Draft 2008 California 303(d)/305(b) Integrated Report

Supporting Information

Regional Board 7 - Colorado River Basin Region

Water Body Name:	Salton Sea
Water Body ID:	CAS7280000019990205133504
Water Body Type:	Saline Lake

DECISION ID	6328
Pollutant:	Nutrients
Final Listing Decision:	Do Not Delist from 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	List on 303(d) list (TMDL required list)(2006)
Revision Status	Revised
Sources:	Agricultural Return Flows | Major Industrial Point Source | Out-of-state source
Expected TMDL Completion Date:	2006
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	303(d) listing decisions made prior to 2006 were not held in an assessment database. The Regional Boards will update this decision when new data and information become available and are assessed.
RWQCB Board Decision / Staff Recommendation:	No new data were assessed for 2008. The Regional Board will update this decision when new data and information become available and are assessed.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 6328

LOE ID:	4394
Pollutant:	Nutrients
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	0
Number of Exceedances:	0
Data and Information Type:	Not Specified
Data Used to Asses Water Quality:	Unspecified--This LOE is a placeholder to support a 303(d) listing decision made prior to 2006.
Data Reference:	Placeholder reference pre-2006 303(d)
Water Quality Objective/Criterion:	Unspecified
Objective/Criterion Reference:	Placeholder reference pre-2006 303(d)
Evaluation Guideline:	Unspecified
Guideline Reference:	Placeholder reference pre-2006 303(d)
Spatial Representation:	Unspecified
Temporal Representation:	Unspecified
Environmental Conditions:	Unspecified
QAPP Information:	Unspecified
QAPP Information Reference(s):

DECISION ID	4370
Pollutant:	Salinity
Final Listing Decision:	Do Not Delist from 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not Delist from 303(d) list (TMDL required list)(2006)
Revision Status	Revised
Sources:	Agricultural Return Flows | Out-of-state source | Point Source
Expected TMDL Completion Date:	2019
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for removal from the section 303(d) list under section 4.1 of the Listing Policy. Under section 4.1 a single line of evidence is necessary to assess delisting status. One line of evidence is available in the administrative record to assess this pollutant. A large number of samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against removing this water segment-pollutant combination from the section 303(d) list. This conclusion is based on the staff findings that: 3. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 4. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Eighty-six of 89 samples exceeded the water quality objective and this exceeds the allowable frequency listed in Table 4.1 of the Listing Policy. 4. Pursuant to section 4.11 of the Listing Policy, no additional data and information are available indicating that standards are met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be removed from the section 303(d) list because applicable water quality standards for the pollutant are being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 4370

LOE ID:	3425
Pollutant:	Salinity
LOE Subgroup:	Pollutant-Water
Matrix:	Not Specified
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	89
Number of Exceedances:	86
Data and Information Type:	Not Specified
Data Used to Asses Water Quality:	Samples were collected by IID at 5 locations around the Salton Sea twice annually from 1995 to 2003. A total of 89 measurements were taken and only 3 measurements were less than 35,000 mg/L and 86 exceeded. Two of those measurements were at the "between rivers" site. Salinity data from this site is generally excluded from the IID Salt Balance Report due to possible influence of fresh water from the New and Alamo Rivers (CRBRWQCB, 2004).
Data Reference:	Placeholder reference 2006 303(d)
Water Quality Objective/Criterion:	The water quality objective for Salton Sea is to reduce the present level of salinity, and stabilize it at 35,000 mg/l unless it can be demonstrated that a different level of salinity is optimal for the sustenance of the Sea's wild and aquatic life (California Department of Fish and Game is attempting to make this determination). However, the achievement of this water quality objective shall be accomplished without adversely affecting the primary purpose of the Sea which is to receive and store agricultural drainage, seepage, and storm waters. Also, because of economic considerations, 35,000 mg/l may not be realistically achievable. In such case, any reduction in salinity which still allows for survival of the sea's aquatic life shall be deemed an acceptable alternative or interim objective. Because of the difficulty and predicted costliness of achieving salinity stabilization of Salton Sea, it is unreasonable for the Regional Board to assume responsibility for implementation of this objective. That responsibility must be shared jointly by all of the agencies which have direct influence on the Sea's fate. Additionally, there must be considerable public support for achieving this objective, without which it is unlikely necessary funding for Salton Sea salinity control will ever be realized.
Objective/Criterion Reference:	Placeholder reference 2006 303(d)
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected at 5 locations around the outer edge of the Salton Sea: Bertram Station, Desert Beach, Salton Sea Beach, Sandy Beach, and Between Rivers.
Temporal Representation:	Samples were collected twice annually (spring and fall) from 5/10/1995 through 10/23/2003.
Environmental Conditions:	Samples were collected every spring and fall when irrigation practices may be most common.
QAPP Information:	Imperial Irrigation District (IID) SOPs and Clinical Laboratory of San Bernardino (CLSB) QA Manual.
QAPP Information Reference(s):

DECISION ID	6329
Pollutant:	Selenium
Final Listing Decision:	Do Not Delist from 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	List on 303(d) list (TMDL required list)(2006)
Revision Status	Revised
Sources:	Source Unknown
Expected TMDL Completion Date:	2019
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for removal from the section 303(d) list under sections 4.1, 4.4, and 4.5 of the Listing Policy. Under section 4.1 a single line of evidence is necessary to assess listing status. Two lines of evidence are available in the administrative record to assess Selenium consistent with Listing Policy section 6.1.5.9. One line however is a placeholder line of evidence, containing no data but is used to indicate this was a listing made prior to 2006. The Office of Environmental Health hazard Assessment has issued a Fish Advisory for the Salton Sea. Because of elevated selenium levels, no one should eat more than four ounces of croaker, orangemouth corvina, sargo, or tilapia taken from the Salton Sea in any two-week period. There were no fish tissue samples that exceeded the water quality objectives. When compared to the OEHHA 7400 ug/kg threshold for consumption, there were no exceedances out of 35 total fish tissue samples taken over all the sampling years. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against removing this water segment-pollutant combination from the section 303(d) list. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. At a minimum, the Office of Environmental Health Hazard Assessment has issued a Fish Advisory for the Salton Sea due to selenium concentration in fish tissue. According to Section 4.4 of the Listing Policy the water quality impairment shall not be removed until the health advisory used to list the water segment has been removed. 4. Pursuant to section 4.11 of the Listing Policy, no additional data and information are available indicating that standards are met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be removed from the section 303(d) list because applicable water quality standards for the pollutant are being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 6329

LOE ID:	23499
Pollutant:	Selenium
LOE Subgroup:	Health Advisories
Matrix:	Tissue
Fraction:	Fish whole body
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:
Number of Exceedances:
Data and Information Type:	Not Specified
Data Used to Asses Water Quality:	A fish consumption advisory has been established for selenium in the Salton Sea by the Office of Environmental Health Hazard Assessment. Because of elevated selenium levels, no one should eat more than four ounces of croaker, orangemouth corvina, sargo, or tilapia taken from the Salton Sea in any two-week period.
Data Reference:	Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene
Water Quality Objective/Criterion:
Objective/Criterion Reference:
Evaluation Guideline:	A fish consumption advisory has been established for selenium in the Salton Sea by the Office of Environmental Health Hazard Assessment. Because of elevated selenium levels, no one should eat more than four ounces of croaker, orangemouth corvina, sargo, or tilapia taken from the Salton Sea in any two-week period.
Guideline Reference:	Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene
Spatial Representation:
Temporal Representation:
Environmental Conditions:
QAPP Information:	Assume good Quality Control
QAPP Information Reference(s):
LOE ID:	5430
Pollutant:	Selenium
LOE Subgroup:	Pollutant-Tissue
Matrix:	Tissue
Fraction:	Total
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	35
Number of Exceedances:	0
Data and Information Type:	Fish tissue analysis
Data Used to Asses Water Quality:	Thirty-five fish fillet samples were taken at 3 locations in the sea. The fish samples were generally collected from 8/1985 through 11/2000. Of these total samples, none exceeded the OEHHA Fish Contaminant Goal (TSMP, 2007).
Data Reference:	Data for organic and inorganic chemicals in fish and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7, collected and reported on the Toxic Substances Monitoring Program (TSMP) database. 1978-2000. State Water Resources Control Board (SWRCB). Sacramento, CA.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	Office of Environmental Health Hazard Assessment (OEHHA) Fish Contaminant Goal of 7400 ug/kg to protect human health when consuming fish (OEHHA, 2008).
Guideline Reference:	Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene
Spatial Representation:	Samples were collected from the following Salton Sea locations: from the North end, the South end and the West Side.
Temporal Representation:	Fish samples were generally collected from 6/1984 through 11/2000. Fish samples were not collected from each location every sampling round. Thirty five fish fillet samples of bairdiella, orangemouth corvina, redbelly tilapia, tilapia, and sargo were collected.Five bairdiella fillet composite samples were collected in the years 1985, 1987, (2)1989, and 2000. Ten orangemouth corvina fillet composite samples were collected in the years 1984-87, (4)1991, 1997, and 1999. Six orangemouth corvine single fish fillet samples were collected in the year (6)1986. Two redbelly tilapia fillet composite samples were collected in year (2)1995. Nine tilapia fillet composite samples were collected in the years 1985,1987, (2)1996, 1997, (2)1998, and (2)2000. Three sargo fillet composite samples were collected in the years 1985, 1987, and 1991.
Environmental Conditions:
QAPP Information:	Field procedures described in TSMP Data Reports and associated Appendices. Used CDFG's Laboratory Quality Assurance Program Plan procedures for laboratory Quality Assurance and Quality Control, as described in Rasmussen (1993).
QAPP Information Reference(s):	Toxic Substances Monitoring Program 1991 Data Report. 93-1WQ. State Water Resources Control Board (SWRCB), Division of Water Quality. Sacramento, CA.
LOE ID:	4395
Pollutant:	Selenium
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Not Recorded
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	0
Number of Exceedances:	0
Data and Information Type:	Not Specified
Data Used to Asses Water Quality:	Unspecified--This LOE is a placeholder to support a 303(d) listing decision made prior to 2006.
Data Reference:	Placeholder reference pre-2006 303(d)
Water Quality Objective/Criterion:	Unspecified
Objective/Criterion Reference:	Placeholder reference pre-2006 303(d)
Evaluation Guideline:	Unspecified
Guideline Reference:	Placeholder reference pre-2006 303(d)
Spatial Representation:	Unspecified
Temporal Representation:	Unspecified
Environmental Conditions:	Unspecified
QAPP Information:	Unspecified
QAPP Information Reference(s):

DECISION ID	8440
Pollutant:	.alpha.-BHC (Benzenehexachloride)
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. One line of evidence is available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 36 water samples exceeded the California Toxics Rule criteria and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8440

LOE ID:	5088
Pollutant:	.alpha.-BHC (Benzenehexachloride) | .alpha.-Endosulfan (Endosulfan 1) | .beta.-BHC (Benzenehexachloride) | .beta.-Endosulfan (Endosulfan 2) | Acenaphthene | Anthracene | Endosulfan sulfate | Endrin | Endrin aldehyde | Fluoranthene | Fluorene | Pyrene
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	36
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Thirty-six water quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at eight locations in the Salton Sea. Of these total samples, none exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Criteria for the protection of human health when consuming organisms from aquatic systems were used for the following constituents: 2700 ug/l Acenaphthene, 0.014 ug/l alpha-BHC, 240 ug/l alpha-Endosulfan, 110000 ug/l Anthracene, 0.046 ug/l beta-BHC, 240 ug/l beta-Endosulfan, 240 ug/l Endosulfan Sulfate, 0.81 ug/l Endrin, 0.81 ug/l Endrin Aldehyde, 370 ug/l Fluoranthene, 14000 ug/l Fluorene, and 11000 ug/l Pyrene (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, Salton Sea GS10.
Temporal Representation:	Thirty-six water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sea NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).

DECISION ID	8442
Pollutant:	.alpha.-Endosulfan (Endosulfan 1)
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Two lines of evidence are available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 36 water samples exceeded the California Toxics Rule criteria protecting either aquatic life uses, or human health when consuming organisms from this water. These do not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8442

LOE ID:	5088
Pollutant:	.alpha.-BHC (Benzenehexachloride) | .alpha.-Endosulfan (Endosulfan 1) | .beta.-BHC (Benzenehexachloride) | .beta.-Endosulfan (Endosulfan 2) | Acenaphthene | Anthracene | Endosulfan sulfate | Endrin | Endrin aldehyde | Fluoranthene | Fluorene | Pyrene
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	36
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Thirty-six water quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at eight locations in the Salton Sea. Of these total samples, none exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Criteria for the protection of human health when consuming organisms from aquatic systems were used for the following constituents: 2700 ug/l Acenaphthene, 0.014 ug/l alpha-BHC, 240 ug/l alpha-Endosulfan, 110000 ug/l Anthracene, 0.046 ug/l beta-BHC, 240 ug/l beta-Endosulfan, 240 ug/l Endosulfan Sulfate, 0.81 ug/l Endrin, 0.81 ug/l Endrin Aldehyde, 370 ug/l Fluoranthene, 14000 ug/l Fluorene, and 11000 ug/l Pyrene (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, Salton Sea GS10.
Temporal Representation:	Thirty-six water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sea NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).
LOE ID:	5083
Pollutant:	.alpha.-Endosulfan (Endosulfan 1) | .beta.-Endosulfan (Endosulfan 2) | Aldrin | Chlordane | DDT | Dieldrin | Endrin | Heptachlor | Heptachlor epoxide
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	36
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Thirty-six water quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at eight locations in the Salton Sea. Of these total samples, none exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Criterion Maximum Concentrations (CMCs) for the protection of freshwater aquatic life uses were used for the following constituents: 3 ug/l Aldrin, 0.22 ug/l alpha Endosulfan, 0.22 ug/l beta-Endosulfan, 2.4 ug/l Chlordane, 1.1 ug/l DDT, 0.24 ug/l Dieldrin, 0.086 ug/l Endrin, 0.52 ug/l Heptachlor, and 0.52 ug/l Heptachlor epoxide (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, and Salton Sea GS10.
Temporal Representation:	Thirty-six water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sa NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).

DECISION ID	8441
Pollutant:	.beta.-BHC (Benzenehexachloride)
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. One line of evidence is available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 36 water samples exceeded the California Toxics Rule criteria and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8441

LOE ID:	5088
Pollutant:	.alpha.-BHC (Benzenehexachloride) | .alpha.-Endosulfan (Endosulfan 1) | .beta.-BHC (Benzenehexachloride) | .beta.-Endosulfan (Endosulfan 2) | Acenaphthene | Anthracene | Endosulfan sulfate | Endrin | Endrin aldehyde | Fluoranthene | Fluorene | Pyrene
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	36
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Thirty-six water quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at eight locations in the Salton Sea. Of these total samples, none exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Criteria for the protection of human health when consuming organisms from aquatic systems were used for the following constituents: 2700 ug/l Acenaphthene, 0.014 ug/l alpha-BHC, 240 ug/l alpha-Endosulfan, 110000 ug/l Anthracene, 0.046 ug/l beta-BHC, 240 ug/l beta-Endosulfan, 240 ug/l Endosulfan Sulfate, 0.81 ug/l Endrin, 0.81 ug/l Endrin Aldehyde, 370 ug/l Fluoranthene, 14000 ug/l Fluorene, and 11000 ug/l Pyrene (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, Salton Sea GS10.
Temporal Representation:	Thirty-six water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sea NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).

DECISION ID	8443
Pollutant:	.beta.-Endosulfan (Endosulfan 2)
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Two lines of evidence are available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 36 water samples exceeded the California Toxics Rule criteria protecting either aquatic life uses, or human health when consuming organisms from this water. These do not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8443

LOE ID:	5088
Pollutant:	.alpha.-BHC (Benzenehexachloride) | .alpha.-Endosulfan (Endosulfan 1) | .beta.-BHC (Benzenehexachloride) | .beta.-Endosulfan (Endosulfan 2) | Acenaphthene | Anthracene | Endosulfan sulfate | Endrin | Endrin aldehyde | Fluoranthene | Fluorene | Pyrene
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	36
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Thirty-six water quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at eight locations in the Salton Sea. Of these total samples, none exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Criteria for the protection of human health when consuming organisms from aquatic systems were used for the following constituents: 2700 ug/l Acenaphthene, 0.014 ug/l alpha-BHC, 240 ug/l alpha-Endosulfan, 110000 ug/l Anthracene, 0.046 ug/l beta-BHC, 240 ug/l beta-Endosulfan, 240 ug/l Endosulfan Sulfate, 0.81 ug/l Endrin, 0.81 ug/l Endrin Aldehyde, 370 ug/l Fluoranthene, 14000 ug/l Fluorene, and 11000 ug/l Pyrene (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, Salton Sea GS10.
Temporal Representation:	Thirty-six water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sea NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).
LOE ID:	5083
Pollutant:	.alpha.-Endosulfan (Endosulfan 1) | .beta.-Endosulfan (Endosulfan 2) | Aldrin | Chlordane | DDT | Dieldrin | Endrin | Heptachlor | Heptachlor epoxide
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	36
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Thirty-six water quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at eight locations in the Salton Sea. Of these total samples, none exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Criterion Maximum Concentrations (CMCs) for the protection of freshwater aquatic life uses were used for the following constituents: 3 ug/l Aldrin, 0.22 ug/l alpha Endosulfan, 0.22 ug/l beta-Endosulfan, 2.4 ug/l Chlordane, 1.1 ug/l DDT, 0.24 ug/l Dieldrin, 0.086 ug/l Endrin, 0.52 ug/l Heptachlor, and 0.52 ug/l Heptachlor epoxide (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, and Salton Sea GS10.
Temporal Representation:	Thirty-six water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sa NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).

DECISION ID	8437
Pollutant:	1,1,2,2-Tetrachloroethane
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. One line of evidence is available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 29 samples exceeded the California Toxics Rule criteria and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8437

LOE ID:	5084
Pollutant:	1,1,2,2-Tetrachloroethane
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	29
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Twenty-nine water quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at six locations in the Salton Sea. Of these total samples, none exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Criteria of 11 ug/l for the protection of human health when consuming organisms from aquatic systems (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS7, and Salton Sea GS9.
Temporal Representation:	Twenty-nine water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sea NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).

DECISION ID	8488
Pollutant:	1,1,2-Trichloroethane
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. One line of evidence is available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 29 water samples exceeded the California Toxics Rule criteria and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8488

LOE ID:	5091
Pollutant:	1,1,2-Trichloroethane | 1,2-Dichloroethane | 1,2-Dichloropropane | Bromoform | Chlorobenzene (mono) | Ethylbenzene | Hexachlorobutadiene | Tetrachloroethylene/PCE | Toluene | Trichloroethylene/TCE | m-Dichlorobenzene
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	29
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Twenty-nine water quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at six locations in the Salton Sea. Of these total samples, none exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Criteria for the protection of human health when consuming organisms from aquatic systems were used for the following constituents: 360 ug/l Bromoform, 21000 ug/l Chlorobenzene, 2600 ug/l m-Dichlorobenzene, 99 ug/l 1,2-Dichloroethane, 39 ug/l 1,2-Dichloropropane, 29000 ug/l Ethylbenzene, 50 ug/l Hexachlorobutadiene, 8.85 ug/l Tetrachloroethylene, 200000 ug/l Toluene, 42 ug/l 1,1,2-Trichloroethane, and 81 ug/l Trichloroethylene (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS7, and Salton Sea GS9.
Temporal Representation:	Twenty-nine water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sea NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).

DECISION ID	8438
Pollutant:	1,1-Dichloroethylene (DCE)/ Vinyldine Chloride
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. One line of evidence is available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 25 water samples exceeded the California Toxics Rule criteria and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8438

LOE ID:	5095
Pollutant:	1,1-Dichloroethylene (DCE)/ Vinyldine Chloride
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	25
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Twenty-five water quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at six locations in the Salton Sea. Of these total samples, none exceeded the CTR Criteria (SWAMP, 2007).).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Criteria of 3.2 ug/l for the protection of human health when consuming organisms from aquatic systems (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS7, and Salton Sea GS9.
Temporal Representation:	Twenty-five water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sea NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).

DECISION ID	8482
Pollutant:	1,2-Dichloroethane
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. One line of evidence is available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 29 water samples exceeded the California Toxics Rule criteria and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8482

LOE ID:	5091
Pollutant:	1,1,2-Trichloroethane | 1,2-Dichloroethane | 1,2-Dichloropropane | Bromoform | Chlorobenzene (mono) | Ethylbenzene | Hexachlorobutadiene | Tetrachloroethylene/PCE | Toluene | Trichloroethylene/TCE | m-Dichlorobenzene
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	29
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Twenty-nine water quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at six locations in the Salton Sea. Of these total samples, none exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Criteria for the protection of human health when consuming organisms from aquatic systems were used for the following constituents: 360 ug/l Bromoform, 21000 ug/l Chlorobenzene, 2600 ug/l m-Dichlorobenzene, 99 ug/l 1,2-Dichloroethane, 39 ug/l 1,2-Dichloropropane, 29000 ug/l Ethylbenzene, 50 ug/l Hexachlorobutadiene, 8.85 ug/l Tetrachloroethylene, 200000 ug/l Toluene, 42 ug/l 1,1,2-Trichloroethane, and 81 ug/l Trichloroethylene (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS7, and Salton Sea GS9.
Temporal Representation:	Twenty-nine water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sea NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).

DECISION ID	8483
Pollutant:	1,2-Dichloropropane
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. One line of evidence is available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 29 water samples exceeded the California Toxics Rule criteria and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8483

LOE ID:	5091
Pollutant:	1,1,2-Trichloroethane | 1,2-Dichloroethane | 1,2-Dichloropropane | Bromoform | Chlorobenzene (mono) | Ethylbenzene | Hexachlorobutadiene | Tetrachloroethylene/PCE | Toluene | Trichloroethylene/TCE | m-Dichlorobenzene
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	29
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Twenty-nine water quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at six locations in the Salton Sea. Of these total samples, none exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Criteria for the protection of human health when consuming organisms from aquatic systems were used for the following constituents: 360 ug/l Bromoform, 21000 ug/l Chlorobenzene, 2600 ug/l m-Dichlorobenzene, 99 ug/l 1,2-Dichloroethane, 39 ug/l 1,2-Dichloropropane, 29000 ug/l Ethylbenzene, 50 ug/l Hexachlorobutadiene, 8.85 ug/l Tetrachloroethylene, 200000 ug/l Toluene, 42 ug/l 1,1,2-Trichloroethane, and 81 ug/l Trichloroethylene (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS7, and Salton Sea GS9.
Temporal Representation:	Twenty-nine water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sea NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).

DECISION ID	8439
Pollutant:	Acenaphthene
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. One line of evidence is available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 36 water samples exceeded the California Toxics Rule criteria and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8439

LOE ID:	5088
Pollutant:	.alpha.-BHC (Benzenehexachloride) | .alpha.-Endosulfan (Endosulfan 1) | .beta.-BHC (Benzenehexachloride) | .beta.-Endosulfan (Endosulfan 2) | Acenaphthene | Anthracene | Endosulfan sulfate | Endrin | Endrin aldehyde | Fluoranthene | Fluorene | Pyrene
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	36
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Thirty-six water quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at eight locations in the Salton Sea. Of these total samples, none exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Criteria for the protection of human health when consuming organisms from aquatic systems were used for the following constituents: 2700 ug/l Acenaphthene, 0.014 ug/l alpha-BHC, 240 ug/l alpha-Endosulfan, 110000 ug/l Anthracene, 0.046 ug/l beta-BHC, 240 ug/l beta-Endosulfan, 240 ug/l Endosulfan Sulfate, 0.81 ug/l Endrin, 0.81 ug/l Endrin Aldehyde, 370 ug/l Fluoranthene, 14000 ug/l Fluorene, and 11000 ug/l Pyrene (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, Salton Sea GS10.
Temporal Representation:	Thirty-six water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sea NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).

DECISION ID	8458
Pollutant:	Aldrin
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under sections 3.1 and 3.5 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Three lines of evidence are available in the administrative record to assess this pollutant. One line of evidence received a Use Rating of Insufficient Information because there was only one sample reported in the line of evidence. According to Table 3.1 of the Listing Policy, the minimum number of samples required is 2. The results of this line of evidence will not be used in the Final Use Rating because the criteria does not match with the other lines of evidence. One of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 36 water samples exceeded the California Toxics Rule criteria protecting aquatic life uses. One of 1 water sample exceeded California Toxics Rule criteria protecting human health when consuming organisms from this water. None of 31 fish tissue samples exceeded the NAS fish tissue guidelines. These do not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8458

LOE ID:	5570
Pollutant:	Aldrin
LOE Subgroup:	Pollutant-Tissue
Matrix:	Tissue
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	31
Number of Exceedances:	0
Data and Information Type:	Fish tissue analysis
Data Used to Asses Water Quality:	Thirty-one fish fillet samples were taken at 3 locations in the sea. The fish samples were generally collected from 5/1980 through 11/2000. Of these total samples, none exceeded the NAS tissue guideline. (TSMP, 2007).
Data Reference:	Data for organic and inorganic chemicals in fish and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7, collected and reported on the Toxic Substances Monitoring Program (TSMP) database. 1978-2000. State Water Resources Control Board (SWRCB). Sacramento, CA.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	National Academy of Science (NAS) tissue guideline of 100 ug/kg for the protection of aquatic life uses (NAS, 1973).
Guideline Reference:	National Academy of Sciences. Water Quality Criteria 1972. EPA-R3-73-033. Washington, D.C.: U.S. Environmental Protection Agency
Spatial Representation:	Samples were collected from the following Salton Sea locations: from the North end, the South end, and the West Side.
Temporal Representation:	Fish tissue samples were generally collected from 5/1980 through 11/2000. Fish tissue samples were not collected from each location every sampling round. Thirty-one fish fillet samples of tilapia, bairdiella, orangemouth corvina, redbelly tilapia, Mozambique tilapia, and sargo were collected. Nine tilapia fillet composites samples were collected in the years 1984-85, (2)1996, 1997, (2)1998, and (2)2000. Five bairdiella fillet composite samples were collected in 1980, 1985, (2)1989, and 2000. Ten orangemouth corvina fillet composite samples were collected in the years (2)1981, 1984-87, (2)1991, 1997, and 1999. Two orangemouth corvina single fish fillet samples were collected in the year (2)1991. Two redbelly tilapia fillet composite samples were collected in the year (2)1995. One Mozambique tilapia fillet composite sample was collected in the year 1980. Two sargo fillet composite samples were collected in the years 1985, and 1991.
Environmental Conditions:
QAPP Information:	The field procedures are described in TSMP Data Reports and associated Appendices. CDFG's Laboratory applies Quality Assurance Program Plan procedures for laboratory Quality Assurance and Quality Control, as described in Rasmussen (1993).
QAPP Information Reference(s):	Toxic Substances Monitoring Program 1991 Data Report. 93-1WQ. State Water Resources Control Board (SWRCB), Division of Water Quality. Sacramento, CA.
LOE ID:	5083
Pollutant:	.alpha.-Endosulfan (Endosulfan 1) | .beta.-Endosulfan (Endosulfan 2) | Aldrin | Chlordane | DDT | Dieldrin | Endrin | Heptachlor | Heptachlor epoxide
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	36
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Thirty-six water quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at eight locations in the Salton Sea. Of these total samples, none exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Criterion Maximum Concentrations (CMCs) for the protection of freshwater aquatic life uses were used for the following constituents: 3 ug/l Aldrin, 0.22 ug/l alpha Endosulfan, 0.22 ug/l beta-Endosulfan, 2.4 ug/l Chlordane, 1.1 ug/l DDT, 0.24 ug/l Dieldrin, 0.086 ug/l Endrin, 0.52 ug/l Heptachlor, and 0.52 ug/l Heptachlor epoxide (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, and Salton Sea GS10.
Temporal Representation:	Thirty-six water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sa NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).
LOE ID:	4875
Pollutant:	Aldrin
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Thirty-six water samples were taken at eight locations on the sea. Thirty-five water sample results could not be used in this assessment because the sample results were non-detect and the detection limit was above the criteria concentration. The one acceptable water sample, collected from the Northwest section of the Salton Sea near Mecca, Ca (NW2) on 5/13/2002, exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Criteria of 0.00014 ug/l for the protection of human health when consuming organisms from aquatic systems (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, Salton Sea GS10.
Temporal Representation:	Thirty-six water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sea NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).

DECISION ID	8446
Pollutant:	Anthracene
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. One line of evidence is available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 36 water samples exceeded the California Toxics Rule criteria and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8446

LOE ID:	5088
Pollutant:	.alpha.-BHC (Benzenehexachloride) | .alpha.-Endosulfan (Endosulfan 1) | .beta.-BHC (Benzenehexachloride) | .beta.-Endosulfan (Endosulfan 2) | Acenaphthene | Anthracene | Endosulfan sulfate | Endrin | Endrin aldehyde | Fluoranthene | Fluorene | Pyrene
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	36
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Thirty-six water quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at eight locations in the Salton Sea. Of these total samples, none exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Criteria for the protection of human health when consuming organisms from aquatic systems were used for the following constituents: 2700 ug/l Acenaphthene, 0.014 ug/l alpha-BHC, 240 ug/l alpha-Endosulfan, 110000 ug/l Anthracene, 0.046 ug/l beta-BHC, 240 ug/l beta-Endosulfan, 240 ug/l Endosulfan Sulfate, 0.81 ug/l Endrin, 0.81 ug/l Endrin Aldehyde, 370 ug/l Fluoranthene, 14000 ug/l Fluorene, and 11000 ug/l Pyrene (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, Salton Sea GS10.
Temporal Representation:	Thirty-six water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sea NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).

DECISION ID	8475
Pollutant:	Benzene
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. One line of evidence is available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 29 water samples exceeded the California Toxics Rule criteria and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8475

LOE ID:	5094
Pollutant:	Benzene
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	29
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Twenty-nine water quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at six locations in the Salton Sea. Of these total samples, none exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Criteria of 71 ug/l for the protection of human health when consuming organisms from aquatic systems (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS7, and Salton Sea GS9.
Temporal Representation:	Twenty-nine water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sea NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).

DECISION ID	8456
Pollutant:	Benzo(a)pyrene (PAHs)
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under sections 3.1 and 3.6 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Two lines of evidence are available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 28 water samples exceeded the California Toxics Rule criteria. None of 36 sediment samples exceeded the sediment quality guideline. These do not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8456

LOE ID:	5092
Pollutant:	Benzo(a)pyrene (PAHs) | Benzo[a]anthracene | Benzo[b]fluoranthene | Benzo[k]fluoranthene | Chrysene (C1-C4) | Dibenz[a,h]anthracene | Indeno[1,2,3-cd]pyrene
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	28
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Twenty-eight water quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at eight locations in the Salton Sea. Of these total samples, none exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Criteria for the protection of human health when consuming organisms from aquatic systems were used for the following constituents: 0.049 ug/l Benzo[a]Anthracene, 0.049 ug/l Benzo[a]Pyrene, 0.049 ug/l Benzo[b]Fluoranthene, 0.049 ug/l Benzo[k]Fluoranthene, 0.049 ug/l Chrysene, 0.049 ug/l Dibenzo(a,h)Anthracene, and 0.049 ug/l Indeno(1,2,3-cd) Pyrene (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, and Salton Sea GS10.
Temporal Representation:	Twenty-eight water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sea NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).
LOE ID:	4965
Pollutant:	Benzo(a)pyrene (PAHs)
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	36
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Thirty-six sediment quality samples were generally collected and analyzed biannually from 5/2002 through 5/2005 at 8 locations in the Salton Sea. Of these total samples, none exceeded the PEC (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	Consensus Based Sediment Quality Guideline Probable Effects Concentration (PEC) of 1450 ug/kg for the protection of freshwater organisms to toxic effects (Macdonald et al, 2000).
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, Salton Sea GS10.
Temporal Representation:	Thirty-six sediment samples were collected. Sediment samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sa NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).

DECISION ID	8447
Pollutant:	Benzo[a]anthracene
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. One line of evidence is available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 28 water samples exceeded the California Toxics Rule criteria and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8447

LOE ID:	5092
Pollutant:	Benzo(a)pyrene (PAHs) | Benzo[a]anthracene | Benzo[b]fluoranthene | Benzo[k]fluoranthene | Chrysene (C1-C4) | Dibenz[a,h]anthracene | Indeno[1,2,3-cd]pyrene
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	28
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Twenty-eight water quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at eight locations in the Salton Sea. Of these total samples, none exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Criteria for the protection of human health when consuming organisms from aquatic systems were used for the following constituents: 0.049 ug/l Benzo[a]Anthracene, 0.049 ug/l Benzo[a]Pyrene, 0.049 ug/l Benzo[b]Fluoranthene, 0.049 ug/l Benzo[k]Fluoranthene, 0.049 ug/l Chrysene, 0.049 ug/l Dibenzo(a,h)Anthracene, and 0.049 ug/l Indeno(1,2,3-cd) Pyrene (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, and Salton Sea GS10.
Temporal Representation:	Twenty-eight water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sea NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).

DECISION ID	8453
Pollutant:	Benzo[b]fluoranthene
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. One line of evidence is available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 28 water samples exceeded the California Toxics Rule criteria and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8453

LOE ID:	5092
Pollutant:	Benzo(a)pyrene (PAHs) | Benzo[a]anthracene | Benzo[b]fluoranthene | Benzo[k]fluoranthene | Chrysene (C1-C4) | Dibenz[a,h]anthracene | Indeno[1,2,3-cd]pyrene
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	28
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Twenty-eight water quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at eight locations in the Salton Sea. Of these total samples, none exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Criteria for the protection of human health when consuming organisms from aquatic systems were used for the following constituents: 0.049 ug/l Benzo[a]Anthracene, 0.049 ug/l Benzo[a]Pyrene, 0.049 ug/l Benzo[b]Fluoranthene, 0.049 ug/l Benzo[k]Fluoranthene, 0.049 ug/l Chrysene, 0.049 ug/l Dibenzo(a,h)Anthracene, and 0.049 ug/l Indeno(1,2,3-cd) Pyrene (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, and Salton Sea GS10.
Temporal Representation:	Twenty-eight water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sea NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).

DECISION ID	8454
Pollutant:	Benzo[k]fluoranthene
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. One line of evidence is available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 28 water samples exceeded the California Toxics Rule criteria and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8454

LOE ID:	5092
Pollutant:	Benzo(a)pyrene (PAHs) | Benzo[a]anthracene | Benzo[b]fluoranthene | Benzo[k]fluoranthene | Chrysene (C1-C4) | Dibenz[a,h]anthracene | Indeno[1,2,3-cd]pyrene
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	28
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Twenty-eight water quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at eight locations in the Salton Sea. Of these total samples, none exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Criteria for the protection of human health when consuming organisms from aquatic systems were used for the following constituents: 0.049 ug/l Benzo[a]Anthracene, 0.049 ug/l Benzo[a]Pyrene, 0.049 ug/l Benzo[b]Fluoranthene, 0.049 ug/l Benzo[k]Fluoranthene, 0.049 ug/l Chrysene, 0.049 ug/l Dibenzo(a,h)Anthracene, and 0.049 ug/l Indeno(1,2,3-cd) Pyrene (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, and Salton Sea GS10.
Temporal Representation:	Twenty-eight water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sea NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).

DECISION ID	8477
Pollutant:	Bromoform
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. One line of evidence is available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 29 water samples exceeded the California Toxics Rule criteria and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8477

LOE ID:	5091
Pollutant:	1,1,2-Trichloroethane | 1,2-Dichloroethane | 1,2-Dichloropropane | Bromoform | Chlorobenzene (mono) | Ethylbenzene | Hexachlorobutadiene | Tetrachloroethylene/PCE | Toluene | Trichloroethylene/TCE | m-Dichlorobenzene
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	29
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Twenty-nine water quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at six locations in the Salton Sea. Of these total samples, none exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Criteria for the protection of human health when consuming organisms from aquatic systems were used for the following constituents: 360 ug/l Bromoform, 21000 ug/l Chlorobenzene, 2600 ug/l m-Dichlorobenzene, 99 ug/l 1,2-Dichloroethane, 39 ug/l 1,2-Dichloropropane, 29000 ug/l Ethylbenzene, 50 ug/l Hexachlorobutadiene, 8.85 ug/l Tetrachloroethylene, 200000 ug/l Toluene, 42 ug/l 1,1,2-Trichloroethane, and 81 ug/l Trichloroethylene (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS7, and Salton Sea GS9.
Temporal Representation:	Twenty-nine water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sea NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).

DECISION ID	8463
Pollutant:	Cadmium
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under sections 3.1, 3.5, and 3.6 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Four lines of evidence are available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 36 water samples exceeded the California Toxics Rule criteria. None of 8 fish tissue samples exceeded the Office of Environmental Health Hazard Assessment fish tissue guideline. None of 49 sediment samples exceeded the sediment quality guideline. These do not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8463

LOE ID:	5287
Pollutant:	Cadmium
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	13
Number of Exceedances:	0
Data and Information Type:	Other Agencies/Organizations provided monitoring data
Data Used to Asses Water Quality:	Thirteen sediment quality samples were taken at 10 locations in the Salton Sea, collected between 7/1998 and 10/2001. Out of these total samples, none exceeded the PEC Criteria (USGS, 2007).
Data Reference:	Data for organic and inorganic chemicals in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7, collected and reported on the National Water Information System (NWIS) Water Quality database. 1961-2005.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	Consensus Based Sediment Quality Guideline Probable Effects Concentration (PEC) Criteria 4.98 mg/kg for the protection of aquatic life uses (MacDonald et al, 2000).
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Samples were collected at the following Salton Sea locations: USGS Station No. 333006116031501 near the mouth of the Coachella Valley Storm Water Channel, USGS Station No. 332958116023501 in the Coachella Valley Storm Water Channel Delta, USGS Station No. 332908116011501 between North Basin and Coachella Valley Storm Water Channel, USGS Station No. 332637115512001 in Salt Creek Delta, USGS Station No. 331400115450001 near center of South Basin, USGS Station No. 331215115410001 between South Basin and New and Alamo River Deltas, USGS Station No. 330835115434501 in New River Delta, USGS Station No. 331023115473701 in San Felipe Creek Delta, USGS Station No. 330803115414001 near the mouth of New River, and USGS Station No. 331242115371401 near the mouth of Alamo River.
Temporal Representation:	Thirteen samples were collected. Samples were generally collected from 7/1998 through 10/2001. Seven samples were in 1998, 1 sample was collected in 1999, no samples were collected in 2000, and 5 samples were collected in 2001.
Environmental Conditions:
QAPP Information:	Assume samplers used standard USGS methods for sample collection (Wilde, variously dated). Assume analysts used standard analytical methods and quality assurance as described in (USGS, 2007).
QAPP Information Reference(s):	Data for organic and inorganic chemicals in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7, collected and reported on the National Water Information System (NWIS) Water Quality database. 1961-2005.
	Field measurements: U.S. Geological Survey Techniques of Water-Resources Investigations, book 9, chap. A6. In United States Geological Survey (USGS). Variously dated. National field manual for the collection of water-quality data: U.S. Geological Survey Techniques of Water-Resources Investigations, book 9, chaps. A1-A9, available online at http://pubs.water.usgs.gov/twri9A.
LOE ID:	5078
Pollutant:	Cadmium | Lead | Nickel | Zinc
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	36
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Thirty-six water quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at eight locations in the Salton Sea. Of these total samples, none exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Hardness Dependent Criterion Maximum Concentrations (CMCs) for the protection of freshwater aquatic life uses were used for the following constituents: Cadmium, Lead, Nickel, and Zinc (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, and Salton Sea GS10.
Temporal Representation:	Thirty-six water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sa NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).
LOE ID:	5109
Pollutant:	Arsenic | Benzo[a]anthracene | Cadmium | Chromium (total) | Chrysene (C1-C4) | Copper | Dieldrin | Endrin | Fluoranthene | Fluorene | Lead | Lindane/gamma Hexachlorocyclohexane (gamma-HCH) | Mercury | Naphthalene | Nickel | PCBs (Polychlorinated biphenyls) | Phenanthrene | Pyrene
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	36
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Thirty-six sediment quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at eight locations in the Salton Sea. Of these total samples, none exceeded the PEC (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	Consensus Based Sediment Quality Guideline Probable Effects Concentrations (PECs) for the protection of freshwater organisms to toxic effects were used for the following constituents: 33 mg/kg Arsenic, 1050 ug/kg Benz[a]anthrazene, 4.98 mg/kg Cadmium, 111 mg/kg Chromium, 1290 ug/kg Chrysene, 149 mg/kg Copper, 61.8 ug/g Dieldrin, 207 ug/kg Endrin, 2230 ug/kg Fluoranthene, 536 ug/kg Fluorene, 128 mg/kg Lead, 4.99 ug/kg Lindane/Hexachlorocyclohexane (HCH), 1.06 mg/kg Mercury, 561 ug/kg Naphthalene, 48.6 mg/kg Nickel, 676 ug/kg PCBs (Polychlorinated biphenyls), 1170 ug/kg Phenanthrene , 1520 ug/kg Pyrene (Macdonald et al, 2000).
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, Salton Sea GS10.
Temporal Representation:	Thirty-six sediment samples were collected. Sediment samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sa NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).
LOE ID:	5507
Pollutant:	Cadmium
LOE Subgroup:	Pollutant-Tissue
Matrix:	Tissue
Fraction:	Total
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	8
Number of Exceedances:	0
Data and Information Type:	Fish tissue analysis
Data Used to Asses Water Quality:	Thiry-five fish fillet samples were taken at 3 locations in the sea. Twenty-seven fish fillet sample results could not be used in this assessment because the sample were not analyzed for the analyte. The 8 fish fillet samples that were acceptable were generally collected from 8/1985 through 11/2000 at two locations. Of these total samples, none exceeded the OEHHA Screening Value (TSMP, 2007).
Data Reference:	Data for organic and inorganic chemicals in fish and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7, collected and reported on the Toxic Substances Monitoring Program (TSMP) database. 1978-2000. State Water Resources Control Board (SWRCB). Sacramento, CA.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	Office of Environmental Health Hazard Assessment (OEHHA) Screening Value of 3 mg/kg to protect human health when consuming fish (OEHHA, 1999).
Guideline Reference:	Prevalence of Selected Target Chemical Contaminants in Sport Fish From Two California Lakes: Public health designed screening study. Sacramento, CA: Office of Environmental Health Hazard Assessment
Spatial Representation:	Samples were collected from the following Salton Sea locations: from the North end, the South end, and the West Side.
Temporal Representation:	Fish tissue samples were generally collected from 6/1984 through 11/2000. Fish tissue samples were not collected from each location every sampling round. Thirty five fish fillet samples of bairdiella, orangemouth corvina, redbelly tilapia, tilapia, and sargo were collected.Five bairdiella fillet composite samples were collected in the years 1985, 1987, (2)1989, and 2000. Ten orangemouth corvina fillet composite samples were collected in the years 1984-87, (4)1991, 1997, and 1999. Six orangemouth corvine single fish fillet samples were collected in the year (6)1986. Two redbelly tilapia fillet composite samples were collected in year (2)1995. Nine tilapia fillet composite samples were collected in the years 1985,1987, (2)1996, 1997, (2)1998, and (2)2000. Three sargo fillet composite samples were collected in the years 1985, 1987, and 1991.
Environmental Conditions:
QAPP Information:	The field procedures are described in TSMP Data Reports and associated Appendices. CDFG's Laboratory applies Quality Assurance Program Plan procedures for laboratory Quality Assurance and Quality Control, as described in Rasmussen (1993).
QAPP Information Reference(s):	Toxic Substances Monitoring Program 1991 Data Report. 93-1WQ. State Water Resources Control Board (SWRCB), Division of Water Quality. Sacramento, CA.

DECISION ID	8491
Pollutant:	Carbon tetrachloride
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. One line of evidence is available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 25 water samples exceeded the California Toxics Rule criteria and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8491

LOE ID:	5096
Pollutant:	Carbon tetrachloride
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	25
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Twenty-five water quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at six locations in the Salton Sea. Of these total samples, none exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Criteria of 4.4 ug/l for the protection of human health when consuming organisms from aquatic systems (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS7, and Salton Sea GS9.
Temporal Representation:	Twenty-five water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sea NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).

DECISION ID	8459
Pollutant:	Chlordane
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under sections 3.1, 3.5, and 3.6 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Four lines of evidence are available in the administrative record to assess this pollutant. One line of evidence received a Use Rating of Insufficient Information because there was only one sample reported in the line of evidence. According to Table 3.1 of the Listing Policy, the minimum number of samples required is 2. The results of this line of evidence will not be used in the Final Use Rating because the criteria does not match with other lines of evidence. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 36 water samples exceeded the California Toxics Rule criteria. None of 31 fish tissue samples exceeded National Academy of Sciences fish tissue guideline. None of 5 fish tissue samples exceeded the Office of Environmental Health Hazard Assessment fish tissue guideline. None of 1 sediment sample exceeded the sediment quality guideline. These do not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8459

LOE ID:	5512
Pollutant:	Chlordane
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	Chemical monitoring of sediments
Data Used to Asses Water Quality:	One sediment sample was taken at 1 location in the sea. The sediment sample was collected on 12/10/1987. This sample did not exceed the PEC Criteria (TSMP, 2007).
Data Reference:	Data for organic and inorganic chemicals in fish and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7, collected and reported on the Toxic Substances Monitoring Program (TSMP) database. 1978-2000. State Water Resources Control Board (SWRCB). Sacramento, CA.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	Consensus Based Sediment Quality Guideline Probable Effect Concentration (PEC) of 17.6 ug/g for the protection of freshwater organisms to toxic effects(Macdonald et al, 2000).
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	A sample was collected from the south end of the Salton Sea.
Temporal Representation:	One sediment sample was collected on 12/10/87 .
Environmental Conditions:
QAPP Information:	The field procedures are described in TSMP Data Reports and associated Appendices. CDFG's Laboratory applies Quality Assurance Program Plan procedures for laboratory Quality Assurance and Quality Control, as described in Rasmussen (1993).
QAPP Information Reference(s):	Toxic Substances Monitoring Program 1991 Data Report. 93-1WQ. State Water Resources Control Board (SWRCB), Division of Water Quality. Sacramento, CA.
LOE ID:	5495
Pollutant:	Chlordane
LOE Subgroup:	Pollutant-Tissue
Matrix:	Tissue
Fraction:	Total
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	5
Number of Exceedances:	0
Data and Information Type:	Fish tissue analysis
Data Used to Asses Water Quality:	Thirty-one fish fillet samples were taken at 3 locations in the sea. Twenty-six fish sample results could not be used in this assessment because the sample results were non-detect and the detection limit was above the criteria concentration. The 5 acceptabe fish fillet samples were generally collected from 5/1981 through 11/2000. Of these total samples, none exceeded the OEHHA Fish Contaminant Goal (TSMP, 2007).
Data Reference:	Data for organic and inorganic chemicals in fish and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7, collected and reported on the Toxic Substances Monitoring Program (TSMP) database. 1978-2000. State Water Resources Control Board (SWRCB). Sacramento, CA.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	Office of Environmental Health Hazard Assessment (OEHHA) Fish Contaminant Goal of 5.6 ug/kg to protect human health when consuming fish (OEHHA, 2008).
Guideline Reference:	Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene
Spatial Representation:	Samples were collected from the following Salton Sea locations: from the North end, the South end, and the West Side.
Temporal Representation:	Fish tissue samples were generally collected from 5/1980 through 11/2000. Fish tissue samples were not collected from each location every sampling round. Thirty-one fish fillet samples of tilapia, bairdiella, orangemouth corvina, redbelly tilapia, Mozambique tilapia, and sargo were collected. Nine tilapia fillet composites samples were collected in the years 1984-85, (2)1996, 1997, (2)1998, and (2)2000. Five bairdiella fillet composite samples were collected in 1980, 1985, (2)1989, and 2000. Ten orangemouth corvina fillet composite samples were collected in the years (2)1981, 1984-87, (2)1991, 1997, and 1999. Two orangemouth corvina single fish fillet samples were collected in the year (2)1991. Two redbelly tilapia fillet composite samples were collected in the year (2)1995. One Mozambique tilapia fillet composite sample was collected in the year 1980. Two sargo fillet composite samples were collected in the years 1985, and 1991.
Environmental Conditions:
QAPP Information:	The field procedures are described in TSMP Data Reports and associated Appendices. CDFG's Laboratory applies a Quality Assurance Program Plan procedures for laboratory Quality Assurance and Quality Control, as described in Rasmussen (1993).
QAPP Information Reference(s):	Toxic Substances Monitoring Program 1991 Data Report. 93-1WQ. State Water Resources Control Board (SWRCB), Division of Water Quality. Sacramento, CA.
LOE ID:	5083
Pollutant:	.alpha.-Endosulfan (Endosulfan 1) | .beta.-Endosulfan (Endosulfan 2) | Aldrin | Chlordane | DDT | Dieldrin | Endrin | Heptachlor | Heptachlor epoxide
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	36
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Thirty-six water quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at eight locations in the Salton Sea. Of these total samples, none exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Criterion Maximum Concentrations (CMCs) for the protection of freshwater aquatic life uses were used for the following constituents: 3 ug/l Aldrin, 0.22 ug/l alpha Endosulfan, 0.22 ug/l beta-Endosulfan, 2.4 ug/l Chlordane, 1.1 ug/l DDT, 0.24 ug/l Dieldrin, 0.086 ug/l Endrin, 0.52 ug/l Heptachlor, and 0.52 ug/l Heptachlor epoxide (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, and Salton Sea GS10.
Temporal Representation:	Thirty-six water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sa NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).
LOE ID:	5578
Pollutant:	Chlordane
LOE Subgroup:	Pollutant-Tissue
Matrix:	Tissue
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	31
Number of Exceedances:	0
Data and Information Type:	Fish tissue analysis
Data Used to Asses Water Quality:	Thirty-one fish fillet samples were taken at 3 locations in the sea. The fish samples were generally collected from 5/1980 through 11/2000. Of these total samples, none exceeded the NAS tissue guideline. (TSMP, 2007).
Data Reference:	Data for organic and inorganic chemicals in fish and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7, collected and reported on the Toxic Substances Monitoring Program (TSMP) database. 1978-2000. State Water Resources Control Board (SWRCB). Sacramento, CA.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	National Academy of Science (NAS) tissue guideline of 100 ug/kg for the protection of aquatic life uses (NAS, 1973).
Guideline Reference:	National Academy of Sciences. Water Quality Criteria 1972. EPA-R3-73-033. Washington, D.C.: U.S. Environmental Protection Agency
Spatial Representation:	Samples were collected from the following Salton Sea locations: from the North end, the South end, and the West Side.
Temporal Representation:	Fish tissue samples were generally collected from 5/1980 through 11/2000. Fish tissue samples were not collected from each location every sampling round. Thirty-one fish fillet samples of tilapia, bairdiella, orangemouth corvina, redbelly tilapia, Mozambique tilapia, and sargo were collected. Nine tilapia fillet composites samples were collected in the years 1984-85, (2)1996, 1997, (2)1998, and (2)2000. Five bairdiella fillet composite samples were collected in 1980, 1985, (2)1989, and 2000. Ten orangemouth corvina fillet composite samples were collected in the years (2)1981, 1984-87, (2)1991, 1997, and 1999. Two orangemouth corvina single fish fillet samples were collected in the year (2)1991. Two redbelly tilapia fillet composite samples were collected in the year (2)1995. One Mozambique tilapia fillet composite sample was collected in the year 1980. Two sargo fillet composite samples were collected in the years 1985, and 1991.
Environmental Conditions:
QAPP Information:	The field procedures are described in TSMP Data Reports and associated Appendices. CDFG's Laboratory applies Quality Assurance Program Plan procedures for laboratory Quality Assurance and Quality Control, as described in Rasmussen (1993).
QAPP Information Reference(s):	Toxic Substances Monitoring Program 1991 Data Report. 93-1WQ. State Water Resources Control Board (SWRCB), Division of Water Quality. Sacramento, CA.

DECISION ID	8478
Pollutant:	Chlorobenzene (mono)
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. One line of evidence is available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 29 water samples exceeded the California Toxics Rule criteria and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8478

LOE ID:	5091
Pollutant:	1,1,2-Trichloroethane | 1,2-Dichloroethane | 1,2-Dichloropropane | Bromoform | Chlorobenzene (mono) | Ethylbenzene | Hexachlorobutadiene | Tetrachloroethylene/PCE | Toluene | Trichloroethylene/TCE | m-Dichlorobenzene
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	29
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Twenty-nine water quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at six locations in the Salton Sea. Of these total samples, none exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Criteria for the protection of human health when consuming organisms from aquatic systems were used for the following constituents: 360 ug/l Bromoform, 21000 ug/l Chlorobenzene, 2600 ug/l m-Dichlorobenzene, 99 ug/l 1,2-Dichloroethane, 39 ug/l 1,2-Dichloropropane, 29000 ug/l Ethylbenzene, 50 ug/l Hexachlorobutadiene, 8.85 ug/l Tetrachloroethylene, 200000 ug/l Toluene, 42 ug/l 1,1,2-Trichloroethane, and 81 ug/l Trichloroethylene (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS7, and Salton Sea GS9.
Temporal Representation:	Twenty-nine water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sea NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).

DECISION ID	8464
Pollutant:	Chromium (total)
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under sections 3.1 and 3.6 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Three lines of evidence are available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 36 water samples exceeded the California Toxics Rule criteria. None of 50 sediment samples exceeded the sediment quality guideline. These do not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8464

LOE ID:	5109
Pollutant:	Arsenic | Benzo[a]anthracene | Cadmium | Chromium (total) | Chrysene (C1-C4) | Copper | Dieldrin | Endrin | Fluoranthene | Fluorene | Lead | Lindane/gamma Hexachlorocyclohexane (gamma-HCH) | Mercury | Naphthalene | Nickel | PCBs (Polychlorinated biphenyls) | Phenanthrene | Pyrene
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	36
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Thirty-six sediment quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at eight locations in the Salton Sea. Of these total samples, none exceeded the PEC (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	Consensus Based Sediment Quality Guideline Probable Effects Concentrations (PECs) for the protection of freshwater organisms to toxic effects were used for the following constituents: 33 mg/kg Arsenic, 1050 ug/kg Benz[a]anthrazene, 4.98 mg/kg Cadmium, 111 mg/kg Chromium, 1290 ug/kg Chrysene, 149 mg/kg Copper, 61.8 ug/g Dieldrin, 207 ug/kg Endrin, 2230 ug/kg Fluoranthene, 536 ug/kg Fluorene, 128 mg/kg Lead, 4.99 ug/kg Lindane/Hexachlorocyclohexane (HCH), 1.06 mg/kg Mercury, 561 ug/kg Naphthalene, 48.6 mg/kg Nickel, 676 ug/kg PCBs (Polychlorinated biphenyls), 1170 ug/kg Phenanthrene , 1520 ug/kg Pyrene (Macdonald et al, 2000).
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, Salton Sea GS10.
Temporal Representation:	Thirty-six sediment samples were collected. Sediment samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sa NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).
LOE ID:	5077
Pollutant:	Chromium (total)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	36
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Thirty-six water quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at eight locations in the Salton Sea. Of these total samples, none exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Criterion Maximum Concentration (CMC) of 1724 ug/l for the protection of freshwater aquatic life uses (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, and Salton Sea GS10.
Temporal Representation:	Thirty-six water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sa NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).
LOE ID:	5244
Pollutant:	Chromium (total)
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	14
Number of Exceedances:	0
Data and Information Type:	Other Agencies/Organizations provided monitoring data
Data Used to Asses Water Quality:	Fourteen sediment quality samples were taken at 11 locations in the Salton Sea, generally collected from 7/1998 through 10/2001. Of these total samples , none exceeded the PEC Criteria (USGS, 2007).
Data Reference:	Data for organic and inorganic chemicals in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7, collected and reported on the National Water Information System (NWIS) Water Quality database. 1961-2005.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	Consensus Based Sediment Quality Guideline Probable Effects Concentration (PEC) Criteria 111 mg/kg for the protection of aquatic life uses (MacDonald et al, 2000).
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Samples were collected at the following Salton Sea locations: USGS Station No. 333006116031501 near the mouth of the Coachella Valley Storm Water Channel, USGS Station No. 332958116023501 in the Coachella Valley Storm Water Channel Delta, USGS Station No. 332908116011501 between North Basin and Coachella Valley Storm Water Channel, USGS Station No. 332637115512001 in Salt Creek Delta, USGS Station No. 331400115380001 in Alamo River Delta, USGS Station No. 331400115450001 near center of South Basin, USGS Station No. 331215115410001 between South Basin and New and Alamo River Deltas, USGS Station No. 330835115434501 in New River Delta, USGS Station No. 331023115473701 in San Felipe Creek Delta, USGS Station No. 330803115414001 near the mouth of New River, and USGS Station No. 331242115371401 near the mouth of Alamo River.
Temporal Representation:	Fourteen samples were collected. Samples were generally collected from 7/1998 through 10/2001. Seven samples were collected in 1998, 1 samples was collected in 1999, no samples were collected in 2000, and 6 samples were collected in 2001.
Environmental Conditions:
QAPP Information:	Assume samplers used standard USGS methods for sample collection (Wilde, variously dated). Assume analysts used standard analytical methods and quality assurance as described in (USGS, 2007).
QAPP Information Reference(s):	Data for organic and inorganic chemicals in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7, collected and reported on the National Water Information System (NWIS) Water Quality database. 1961-2005.
	Field measurements: U.S. Geological Survey Techniques of Water-Resources Investigations, book 9, chap. A6. In United States Geological Survey (USGS). Variously dated. National field manual for the collection of water-quality data: U.S. Geological Survey Techniques of Water-Resources Investigations, book 9, chaps. A1-A9, available online at http://pubs.water.usgs.gov/twri9A.

DECISION ID	8465
Pollutant:	Chrysene (C1-C4)
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under sections 3.1 and 3.6 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Two lines of evidence are available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 28 water samples exceeded the California Toxics Rule criteria. None of 36 sediment samples exceeded the sediment quality guideline. These do not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8465

LOE ID:	5109
Pollutant:	Arsenic | Benzo[a]anthracene | Cadmium | Chromium (total) | Chrysene (C1-C4) | Copper | Dieldrin | Endrin | Fluoranthene | Fluorene | Lead | Lindane/gamma Hexachlorocyclohexane (gamma-HCH) | Mercury | Naphthalene | Nickel | PCBs (Polychlorinated biphenyls) | Phenanthrene | Pyrene
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	36
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Thirty-six sediment quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at eight locations in the Salton Sea. Of these total samples, none exceeded the PEC (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	Consensus Based Sediment Quality Guideline Probable Effects Concentrations (PECs) for the protection of freshwater organisms to toxic effects were used for the following constituents: 33 mg/kg Arsenic, 1050 ug/kg Benz[a]anthrazene, 4.98 mg/kg Cadmium, 111 mg/kg Chromium, 1290 ug/kg Chrysene, 149 mg/kg Copper, 61.8 ug/g Dieldrin, 207 ug/kg Endrin, 2230 ug/kg Fluoranthene, 536 ug/kg Fluorene, 128 mg/kg Lead, 4.99 ug/kg Lindane/Hexachlorocyclohexane (HCH), 1.06 mg/kg Mercury, 561 ug/kg Naphthalene, 48.6 mg/kg Nickel, 676 ug/kg PCBs (Polychlorinated biphenyls), 1170 ug/kg Phenanthrene , 1520 ug/kg Pyrene (Macdonald et al, 2000).
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, Salton Sea GS10.
Temporal Representation:	Thirty-six sediment samples were collected. Sediment samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sa NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).
LOE ID:	5092
Pollutant:	Benzo(a)pyrene (PAHs) | Benzo[a]anthracene | Benzo[b]fluoranthene | Benzo[k]fluoranthene | Chrysene (C1-C4) | Dibenz[a,h]anthracene | Indeno[1,2,3-cd]pyrene
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	28
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Twenty-eight water quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at eight locations in the Salton Sea. Of these total samples, none exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Criteria for the protection of human health when consuming organisms from aquatic systems were used for the following constituents: 0.049 ug/l Benzo[a]Anthracene, 0.049 ug/l Benzo[a]Pyrene, 0.049 ug/l Benzo[b]Fluoranthene, 0.049 ug/l Benzo[k]Fluoranthene, 0.049 ug/l Chrysene, 0.049 ug/l Dibenzo(a,h)Anthracene, and 0.049 ug/l Indeno(1,2,3-cd) Pyrene (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, and Salton Sea GS10.
Temporal Representation:	Twenty-eight water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sea NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).

DECISION ID	8466
Pollutant:	Copper
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under sections 3.1 and 3.6 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Four lines of evidence is available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 36 water samples exceeded either the California Toxcis Rule or the U.S. Fish and Wildlife Service criteria. None of 49 sediment samples exceeded sediment quality guideline. These do not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8466

LOE ID:	5099
Pollutant:	Arsenic | Copper
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	36
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Thirty-six water quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at eight locations in the Salton Sea. Of these total samples, none exceeded the USFWS Biological Effects Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	United State Fish and Wildlife Service (USFWS) Biological Effects Criteria for the protection of aquatic life uses were used for the following constituents: 0.25 mg/l Arsenic, and 15 mg/l Copper (USDOI, 1998).
Guideline Reference:	Guidelines for Interpretation of the Biological Effect of Selected Constituents in Biota, Water, and Sediment. US Department of Interior report.
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, Salton Sea GS10.
Temporal Representation:	Thirty-six water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sa NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).
LOE ID:	5109
Pollutant:	Arsenic | Benzo[a]anthracene | Cadmium | Chromium (total) | Chrysene (C1-C4) | Copper | Dieldrin | Endrin | Fluoranthene | Fluorene | Lead | Lindane/gamma Hexachlorocyclohexane (gamma-HCH) | Mercury | Naphthalene | Nickel | PCBs (Polychlorinated biphenyls) | Phenanthrene | Pyrene
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	36
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Thirty-six sediment quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at eight locations in the Salton Sea. Of these total samples, none exceeded the PEC (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	Consensus Based Sediment Quality Guideline Probable Effects Concentrations (PECs) for the protection of freshwater organisms to toxic effects were used for the following constituents: 33 mg/kg Arsenic, 1050 ug/kg Benz[a]anthrazene, 4.98 mg/kg Cadmium, 111 mg/kg Chromium, 1290 ug/kg Chrysene, 149 mg/kg Copper, 61.8 ug/g Dieldrin, 207 ug/kg Endrin, 2230 ug/kg Fluoranthene, 536 ug/kg Fluorene, 128 mg/kg Lead, 4.99 ug/kg Lindane/Hexachlorocyclohexane (HCH), 1.06 mg/kg Mercury, 561 ug/kg Naphthalene, 48.6 mg/kg Nickel, 676 ug/kg PCBs (Polychlorinated biphenyls), 1170 ug/kg Phenanthrene , 1520 ug/kg Pyrene (Macdonald et al, 2000).
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, Salton Sea GS10.
Temporal Representation:	Thirty-six sediment samples were collected. Sediment samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sa NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).
LOE ID:	5288
Pollutant:	Copper
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	13
Number of Exceedances:	0
Data and Information Type:	Other Agencies/Organizations provided monitoring data
Data Used to Asses Water Quality:	Thirteen sediment quality samples were taken at 10 locations in the Salton Sea, collected between 7/1998 and 10/2001. Out of these total samples, none exceeded the PEC Criteria (USGS, 2007).
Data Reference:	Data for organic and inorganic chemicals in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7, collected and reported on the National Water Information System (NWIS) Water Quality database. 1961-2005.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	Consensus Based Sediment Quality Guideline Probable Effects Concentration (PEC) Criteria 149 mg/kg for the protection of aquatic life uses (MacDonald et al, 2000).
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Samples were collected at the following Salton Sea locations: USGS Station No. 333006116031501 near the mouth of the Coachella Valley Storm Water Channel, USGS Station No. 332958116023501 in the Coachella Valley Storm Water Channel Delta, USGS Station No. 332908116011501 between North Basin and Coachella Valley Storm Water Channel, USGS Station No. 332637115512001 in Salt Creek Delta, USGS Station No. 331400115450001 near center of South Basin, USGS Station No. 331215115410001 between South Basin and New and Alamo River Deltas, USGS Station No. 330835115434501 in New River Delta, USGS Station No. 331023115473701 in San Felipe Creek Delta, USGS Station No. 330803115414001 near the mouth of New River, and USGS Station No. 331242115371401 near the mouth of Alamo River.
Temporal Representation:	Thirteen samples were collected. Samples were generally collected from 7/1998 through 10/2001. Seven samples were in 1998, 1 sample was collected in 1999, no samples were collected in 2000, and 5 samples were collected in 2001.
Environmental Conditions:
QAPP Information:	Assume samplers used standard USGS methods for sample collection (Wilde, variously dated). Assume analysts used standard analytical methods and quality assurance as described in (USGS, 2007).
QAPP Information Reference(s):	Data for organic and inorganic chemicals in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7, collected and reported on the National Water Information System (NWIS) Water Quality database. 1961-2005.
	Field measurements: U.S. Geological Survey Techniques of Water-Resources Investigations, book 9, chap. A6. In United States Geological Survey (USGS). Variously dated. National field manual for the collection of water-quality data: U.S. Geological Survey Techniques of Water-Resources Investigations, book 9, chaps. A1-A9, available online at http://pubs.water.usgs.gov/twri9A.
LOE ID:	4949
Pollutant:	Copper
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	36
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Thirty-six water quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at eight locations in the Salton Sea. Of these total samples, none exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule Hardness Dependent Criterion Maximum Concentration (CMC) for the protection of freshwater aquatic life uses (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, Salton Sea GS10.
Temporal Representation:	Thiry-six water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sea NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).

DECISION ID	8492
Pollutant:	DDE
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under section 3.6 of the Listing Policy. Under section 3.6 a single line of evidence is necessary to assess listing status. One line of evidence is available in the administrative record to assess this pollutant. This line of evidence received a Use Rating of Insufficient Information because there was only one sample reported in the line of evidence. According to Table 3.1 of the Listing Policy, the minimum number of samples required is 2. This sample exceeded the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. One of 1 sediment sample exceeded the sediment quality guideline and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8492

LOE ID:	5431
Pollutant:	DDE
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	Other Agencies/Organizations provided monitoring data
Data Used to Asses Water Quality:	One sediment sample was taken at 1 location in the sea. The sediment sample was collected on 12/10/1987. This sample exceeded the PEC Criteria (TSMP, 2007).
Data Reference:	Data for organic and inorganic chemicals in fish and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7, collected and reported on the Toxic Substances Monitoring Program (TSMP) database. 1978-2000. State Water Resources Control Board (SWRCB). Sacramento, CA.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	Consensus Based Sediment Quality Guideline Probable Effect Concentration (PEC) of 31.3 ug/kg for the protection of freshwater organisms to toxic effects(Macdonald et al, 2000).
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	A sample was collected from the south end of the Salton Sea.
Temporal Representation:	One sediment samples was collected on 12/10/87 .The exceedence was found in the sample collected on 12/10/1987.
Environmental Conditions:
QAPP Information:	The field procedures are described in TSMP Data Reports and associated Appendices. CDFG's Laboratory applies a Quality Assurance Program Plan procedures for laboratory Quality Assurance and Quality Control, as described in Rasmussen (1993).
QAPP Information Reference(s):	Toxic Substances Monitoring Program 1991 Data Report. 93-1WQ. State Water Resources Control Board (SWRCB), Division of Water Quality. Sacramento, CA.

DECISION ID	8476
Pollutant:	Dichlorobromomethane
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. One line of evidence is available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 29 water samples exceeded the California Toxics Rule criteria and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8476

LOE ID:	5093
Pollutant:	Dichlorobromomethane
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	29
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Twenty-nine water quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at six locations in the Salton Sea. Of these total samples, none exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Criteria of 46 ug/l for the protection of human health when consuming organisms from aquatic systems (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS7, and Salton Sea GS9.
Temporal Representation:	Twenty-nine water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sea NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).

DECISION ID	8494
Pollutant:	Dichloromethane
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. One line of evidence is available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 4 water samples exceeded the California Toxics Rule criteria and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8494

LOE ID:	5098
Pollutant:	Dichloromethane | Methyl bromide | Vinyl chloride
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	4
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Four water quality samples were collected and analyzed biannually in 5/2002 at four locations in the Salton Sea. Of these total samples, none exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Criteria for the protection of human health when consuming organisms from aquatic systems were used for the following constituents:4000 ug/l Methyl Bromide, 16000 ug/l Dichloromethane, and 525 ug/l Vinyl Chloride (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea GS2, Salton Sea GS7, and Salton Sea GS9.
Temporal Representation:	Four water samples were collected. Water samples were collected and analyzed in 5/2002.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).

DECISION ID	8460
Pollutant:	Dieldrin
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under sections 3.1, 3.5, and 3.6 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Six lines of evidence are available in the administrative record to assess this pollutant. Three lines of evidence received a Use Rating of Insufficient Information because there was only one sample reported in the line of evidence. According to Table 3.1 of the Listing Policy, the minimum number of samples required is 2. The results of one line of evidence will be combined with the results from another line of evidence in the Final Use Rating. The results from the other lines of evidence will not be used in the Final Use Rating because there are no other lines of evidence to combine this data with. Two of the samples exceed the water quality objectives. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 36 water samples exceeded the California Toxics Rule criteria protecting aquatic life uses. One of 1 water sample exceeded the California Toxics Rule criteria protecting human health when consuming organism from this water. One of 1 fish tissue samples exceeded the Office of Environmental Health Hazard Assessment fish tissue guideline. None of 31 fish tissue samples exceeded the National Academy of Sciences fish tissue guideline. None of 37 sediment samples exceeded sediment quality guidelines. These do not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8460

LOE ID:	4877
Pollutant:	Dieldrin
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Thirty-six water samples were taken at eight locations on the sea. Thirty-five water sample results could not be used because the sample results were non-detect and the detection limit was above the criteria concentration. The one acceptible water quality sample, collected on 5/24/2004, was from one location in the Salton Sea (GS9). This sample exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Criteria of 0.00014 ug/l for the protection of human health when consuming organisms from aquatic systems (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, Salton Sea GS10.
Temporal Representation:	Thirty-six water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sea NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. The exceedence was found in a sample collected from 5/24/04.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).
LOE ID:	5109
Pollutant:	Arsenic | Benzo[a]anthracene | Cadmium | Chromium (total) | Chrysene (C1-C4) | Copper | Dieldrin | Endrin | Fluoranthene | Fluorene | Lead | Lindane/gamma Hexachlorocyclohexane (gamma-HCH) | Mercury | Naphthalene | Nickel | PCBs (Polychlorinated biphenyls) | Phenanthrene | Pyrene
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	36
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Thirty-six sediment quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at eight locations in the Salton Sea. Of these total samples, none exceeded the PEC (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	Consensus Based Sediment Quality Guideline Probable Effects Concentrations (PECs) for the protection of freshwater organisms to toxic effects were used for the following constituents: 33 mg/kg Arsenic, 1050 ug/kg Benz[a]anthrazene, 4.98 mg/kg Cadmium, 111 mg/kg Chromium, 1290 ug/kg Chrysene, 149 mg/kg Copper, 61.8 ug/g Dieldrin, 207 ug/kg Endrin, 2230 ug/kg Fluoranthene, 536 ug/kg Fluorene, 128 mg/kg Lead, 4.99 ug/kg Lindane/Hexachlorocyclohexane (HCH), 1.06 mg/kg Mercury, 561 ug/kg Naphthalene, 48.6 mg/kg Nickel, 676 ug/kg PCBs (Polychlorinated biphenyls), 1170 ug/kg Phenanthrene , 1520 ug/kg Pyrene (Macdonald et al, 2000).
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, Salton Sea GS10.
Temporal Representation:	Thirty-six sediment samples were collected. Sediment samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sa NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).
LOE ID:	5428
Pollutant:	Dieldrin
LOE Subgroup:	Pollutant-Tissue
Matrix:	Tissue
Fraction:	Total
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	Fish tissue analysis
Data Used to Asses Water Quality:	Thirty-one fish fillet samples were taken at 3 locations in the sea. Thirty fish fillet samples could not be used in this assessment because the sample results were non-detect and the detection limit was above the criteria concentrations. The 1 fish fillet samples that was acceptable was collected on 5/30/1991. Of these total samples, 1 fish fillet sample collected at one location exceeded the OEHHA Fish Contaminant Goal. At the Salton Sea North location an exceedance was found in 1 sargo fillet composite sample collected on 5/30/1991 (TSMP, 2007).
Data Reference:	Data for organic and inorganic chemicals in fish and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7, collected and reported on the Toxic Substances Monitoring Program (TSMP) database. 1978-2000. State Water Resources Control Board (SWRCB). Sacramento, CA.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	Office of Environmental Health Hazard Assessment (OEHHA) Fish Contaminant Goal of 0.46 ug/kg to protect human health when consuming fish (OEHHA, 20008).
Guideline Reference:	Prevalence of Selected Target Chemical Contaminants in Sport Fish From Two California Lakes: Public health designed screening study. Sacramento, CA: Office of Environmental Health Hazard Assessment
	Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene
Spatial Representation:	Samples were collected from the following Salton Sea locations: from the North end, the South end and the West Side.
Temporal Representation:	Fish tissue samples were generally collected from 5/1980 through 11/2000. Fish tissue samples were not collected from each location every sampling round. Thirty-one fish fillet samples of tilapia, bairdiella, orangemouth corvina, redbelly tilapia, Mozambique tilapia, and sargo were collected. Nine tilapia fillet composites samples were collected in the years 1984-85, (2)1996, 1997, (2)1998, and (2)2000. Five bairdiella fillet composite samples were collected in 1980, 1985, (2)1989, and 2000. Ten orangemouth corvina fillet composite samples were collected in the years (2)1981, 1984-87, (2)1991, 1997, and 1999. Two orangemouth corvina single fish fillet samples were collected in the year (2)1991. Two redbelly tilapia fillet composite samples were collected in the year (2)1995. One Mozambique tilapia fillet composite sample was collected in the year 1980. Two sargo fillet composite samples were collected in the years 1985, and 1991. The exceedance was found in a sample collected on 5/30/1991.
Environmental Conditions:
QAPP Information:	The field procedures are described in TSMP Data Reports and associated Appendices. CDFG's Laboratory applies a Quality Assurance Program Plan procedures for laboratory Quality Assurance and Quality Control, as described in Rasmussen (1993).
QAPP Information Reference(s):	Toxic Substances Monitoring Program 1991 Data Report. 93-1WQ. State Water Resources Control Board (SWRCB), Division of Water Quality. Sacramento, CA.
LOE ID:	5515
Pollutant:	Dieldrin
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	Chemical monitoring of sediments
Data Used to Asses Water Quality:	One sediment sample was taken at 1 location in the sea. The sediment sample was collected on 12/10/1987. This sample did not exceed the PEC Criteria (TSMP, 2007).
Data Reference:	Data for organic and inorganic chemicals in fish and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7, collected and reported on the Toxic Substances Monitoring Program (TSMP) database. 1978-2000. State Water Resources Control Board (SWRCB). Sacramento, CA.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	Consensus Based Sediment Quality Guideline Probable Effect Concentration (PEC) of 61.8 ug/g for the protection of freshwater organisms to toxic effects(Macdonald et al, 2000).
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	A sample was collected from the south end of the Salton Sea.
Temporal Representation:	One sediment samples was collected on 12/10/87 .
Environmental Conditions:
QAPP Information:	The field procedures are described in TSMP Data Reports and associated Appendices. CDFG's Laboratory applies Quality Assurance Program Plan procedures for laboratory Quality Assurance and Quality Control, as described in Rasmussen (1993).
QAPP Information Reference(s):	Toxic Substances Monitoring Program 1991 Data Report. 93-1WQ. State Water Resources Control Board (SWRCB), Division of Water Quality. Sacramento, CA.
LOE ID:	5597
Pollutant:	Dieldrin
LOE Subgroup:	Pollutant-Tissue
Matrix:	Tissue
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	31
Number of Exceedances:	0
Data and Information Type:	Fish tissue analysis
Data Used to Asses Water Quality:	Thirty-one fish fillet samples were taken at 3 locations in the sea. The fish samples were generally collected rom 5/1980 through 11/2000. Of these total samples, none exceeded the NAS tissue guideline. (TSMP, 2007).
Data Reference:	Data for organic and inorganic chemicals in fish and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7, collected and reported on the Toxic Substances Monitoring Program (TSMP) database. 1978-2000. State Water Resources Control Board (SWRCB). Sacramento, CA.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	National Academy of Science (NAS) tissue guideline of 100 ug/kg for the protection of aquatic life uses (NAS, 1973).
Guideline Reference:	National Academy of Sciences. Water Quality Criteria 1972. EPA-R3-73-033. Washington, D.C.: U.S. Environmental Protection Agency
Spatial Representation:	Samples were collected from the Salton Sea from the North end, the South end, and the West Side.
Temporal Representation:	Fish tissue samples were generally collected from 5/1980 through 11/2000. Fish tissue samples were not collected from each location every sampling round. Thirty-one fish fillet samples of tilapia, bairdiella, orangemouth corvina, redbelly tilapia, Mozambique tilapia, and sargo were collected. Nine tilapia fillet composites samples were collected in the years 1984-85, (2)1996, 1997, (2)1998, and (2)2000. Five bairdiella fillet composite samples were collected in 1980, 1985, (2)1989, and 2000. Ten orangemouth corvina fillet composite samples were collected in the years (2)1981, 1984-87, (2)1991, 1997, and 1999. Two orangemouth corvina single fish fillet samples were collected in the year (2)1991. Two redbelly tilapia fillet composite samples were collected in the year (2)1995. One Mozambique tilapia fillet composite sample was collected in the year 1980. Two sargo fillet composite samples were collected in the years 1985, and 1991.
Environmental Conditions:
QAPP Information:	The field procedures are described in TSMP Data Reports and associated Appendices. CDFG's Laboratory applies Quality Assurance Program Plan procedures for laboratory Quality Assurance and Quality Control, as described in Rasmussen (1993).
QAPP Information Reference(s):	Toxic Substances Monitoring Program 1991 Data Report. 93-1WQ. State Water Resources Control Board (SWRCB), Division of Water Quality. Sacramento, CA.
LOE ID:	5083
Pollutant:	.alpha.-Endosulfan (Endosulfan 1) | .beta.-Endosulfan (Endosulfan 2) | Aldrin | Chlordane | DDT | Dieldrin | Endrin | Heptachlor | Heptachlor epoxide
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	36
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Thirty-six water quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at eight locations in the Salton Sea. Of these total samples, none exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Criterion Maximum Concentrations (CMCs) for the protection of freshwater aquatic life uses were used for the following constituents: 3 ug/l Aldrin, 0.22 ug/l alpha Endosulfan, 0.22 ug/l beta-Endosulfan, 2.4 ug/l Chlordane, 1.1 ug/l DDT, 0.24 ug/l Dieldrin, 0.086 ug/l Endrin, 0.52 ug/l Heptachlor, and 0.52 ug/l Heptachlor epoxide (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, and Salton Sea GS10.
Temporal Representation:	Thirty-six water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sa NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).

DECISION ID	8445
Pollutant:	Endosulfan
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under section 3.5 of the Listing Policy. Under section 3.5 a single line of evidence is necessary to assess listing status. Two lines of evidence are available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 31 fish tissue samples exceeded either the Office of Environmental Health Hazard Assessment or National Academy of Sciences fish tissue guidelines. These do not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8445

LOE ID:	5498
Pollutant:	Endosulfan
LOE Subgroup:	Pollutant-Tissue
Matrix:	Tissue
Fraction:	Total
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	31
Number of Exceedances:	0
Data and Information Type:	Fish tissue analysis
Data Used to Asses Water Quality:	Thirty-one fish fillet samples were taken at 3 locations in the sea. The fish samples were generally collected from 5/1980 through 11/2000. Of these total samples, none exceeded the OEHHA Screening Value. (TSMP, 2007).
Data Reference:	Data for organic and inorganic chemicals in fish and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7, collected and reported on the Toxic Substances Monitoring Program (TSMP) database. 1978-2000. State Water Resources Control Board (SWRCB). Sacramento, CA.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	Office of Environmental Health Hazard Assessment (OEHHA) Screening Value of 20,000 ug/kg to protect human health when consuming fish (OEHHA, 1999).
Guideline Reference:	Prevalence of Selected Target Chemical Contaminants in Sport Fish From Two California Lakes: Public health designed screening study. Sacramento, CA: Office of Environmental Health Hazard Assessment
Spatial Representation:	Samples were collected from the following Salton Sea locations: from the North end, the South end, and the West Side.
Temporal Representation:	Fish tissue samples were generally collected from 5/1980 through 11/2000. Fish tissue samples were not collected from each location every sampling round. Thirty-one fish fillet samples of tilapia, bairdiella, orangemouth corvina, redbelly tilapia, Mozambique tilapia, and sargo were collected. Nine tilapia fillet composites samples were collected in the years 1984-85, (2)1996, 1997, (2)1998, and (2)2000. Five bairdiella fillet composite samples were collected in 1980, 1985, (2)1989, and 2000. Ten orangemouth corvina fillet composite samples were collected in the years (2)1981, 1984-87, (2)1991, 1997, and 1999. Two orangemouth corvina single fish fillet samples were collected in the year (2)1991. Two redbelly tilapia fillet composite samples were collected in the year (2)1995. One Mozambique tilapia fillet composite sample was collected in the year 1980. Two sargo fillet composite samples were collected in the years 1985, and 1991.
Environmental Conditions:
QAPP Information:	The field procedures are described in TSMP Data Reports and associated Appendices. CDFG's Laboratory applies a Quality Assurance Program Plan procedures for laboratory Quality Assurance and Quality Control, as described in Rasmussen (1993).
QAPP Information Reference(s):	Toxic Substances Monitoring Program 1991 Data Report. 93-1WQ. State Water Resources Control Board (SWRCB), Division of Water Quality. Sacramento, CA.
LOE ID:	5604
Pollutant:	Endosulfan
LOE Subgroup:	Pollutant-Tissue
Matrix:	Tissue
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	31
Number of Exceedances:	0
Data and Information Type:	Fish tissue analysis
Data Used to Asses Water Quality:	Thirty-one fish fillet samples were taken at 3 locations in the sea. The fish samples were generally collected from 5/1980 through 11/2000. Of these total samples, none exceeded the NAS tissue guideline. (TSMP, 2007).
Data Reference:	Data for organic and inorganic chemicals in fish and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7, collected and reported on the Toxic Substances Monitoring Program (TSMP) database. 1978-2000. State Water Resources Control Board (SWRCB). Sacramento, CA.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	National Academy of Science (NAS) tissue guideline of 100 ug/kg for the protection of aquatic life uses (NAS, 1973).
Guideline Reference:	National Academy of Sciences. Water Quality Criteria 1972. EPA-R3-73-033. Washington, D.C.: U.S. Environmental Protection Agency
Spatial Representation:	Samples were collected from the Salton Sea from the North end, the South end, and the West Side.
Temporal Representation:	Fish tissue samples were generally collected from 5/1980 through 11/2000. Fish tissue samples were not collected from each location every sampling round. Thirty-one fish fillet samples of tilapia, bairdiella, orangemouth corvina, redbelly tilapia, Mozambique tilapia, and sargo were collected. Nine tilapia fillet composites samples were collected in the years 1984-85, (2)1996, 1997, (2)1998, and (2)2000. Five bairdiella fillet composite samples were collected in 1980, 1985, (2)1989, and 2000. Ten orangemouth corvina fillet composite samples were collected in the years (2)1981, 1984-87, (2)1991, 1997, and 1999. Two orangemouth corvina single fish fillet samples were collected in the year (2)1991. Two redbelly tilapia fillet composite samples were collected in the year (2)1995. One Mozambique tilapia fillet composite sample was collected in the year 1980. Two sargo fillet composite samples were collected in the years 1985, and 1991.
Environmental Conditions:
QAPP Information:	The field procedures are described in TSMP Data Reports and associated Appendices. CDFG's Laboratory applies Quality Assurance Program Plan procedures for laboratory Quality Assurance and Quality Control, as described in Rasmussen (1993).
QAPP Information Reference(s):	Toxic Substances Monitoring Program 1991 Data Report. 93-1WQ. State Water Resources Control Board (SWRCB), Division of Water Quality. Sacramento, CA.

DECISION ID	8444
Pollutant:	Endosulfan sulfate
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. One line of evidence is available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 36 water samples exceeded the California Toxics Rule criteria and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8444

LOE ID:	5088
Pollutant:	.alpha.-BHC (Benzenehexachloride) | .alpha.-Endosulfan (Endosulfan 1) | .beta.-BHC (Benzenehexachloride) | .beta.-Endosulfan (Endosulfan 2) | Acenaphthene | Anthracene | Endosulfan sulfate | Endrin | Endrin aldehyde | Fluoranthene | Fluorene | Pyrene
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	36
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Thirty-six water quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at eight locations in the Salton Sea. Of these total samples, none exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Criteria for the protection of human health when consuming organisms from aquatic systems were used for the following constituents: 2700 ug/l Acenaphthene, 0.014 ug/l alpha-BHC, 240 ug/l alpha-Endosulfan, 110000 ug/l Anthracene, 0.046 ug/l beta-BHC, 240 ug/l beta-Endosulfan, 240 ug/l Endosulfan Sulfate, 0.81 ug/l Endrin, 0.81 ug/l Endrin Aldehyde, 370 ug/l Fluoranthene, 14000 ug/l Fluorene, and 11000 ug/l Pyrene (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, Salton Sea GS10.
Temporal Representation:	Thirty-six water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sea NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).

DECISION ID	8449
Pollutant:	Endrin
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under sections 3.1, 3.5, and 3.6 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Six lines of evidence are available in the administrative record to assess this pollutant. One line of evidence received a Use Rating of Insufficient Information because there was only one sample reported in the line of evidence. According to Table 3.1 of the Listing Policy, the minimum number of samples required is 2. The results of this line of evidence will be combined with the results from another line of evidence in the Final Use Rating. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 36 water samples exceeded California Toxics Rule criteria protecting either aquatic life uses, or human health when consuming organisms from this water. None of 31 fish tissue samples exceeded either the Office of Environmental Health Hazard Assessment or National Academy of Sciences fish tissue guidelines. None of 37 sediment samples exceeded the sediment quality guideline. These do not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8449

LOE ID:	5083
Pollutant:	.alpha.-Endosulfan (Endosulfan 1) | .beta.-Endosulfan (Endosulfan 2) | Aldrin | Chlordane | DDT | Dieldrin | Endrin | Heptachlor | Heptachlor epoxide
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	36
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Thirty-six water quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at eight locations in the Salton Sea. Of these total samples, none exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Criterion Maximum Concentrations (CMCs) for the protection of freshwater aquatic life uses were used for the following constituents: 3 ug/l Aldrin, 0.22 ug/l alpha Endosulfan, 0.22 ug/l beta-Endosulfan, 2.4 ug/l Chlordane, 1.1 ug/l DDT, 0.24 ug/l Dieldrin, 0.086 ug/l Endrin, 0.52 ug/l Heptachlor, and 0.52 ug/l Heptachlor epoxide (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, and Salton Sea GS10.
Temporal Representation:	Thirty-six water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sa NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).
LOE ID:	5088
Pollutant:	.alpha.-BHC (Benzenehexachloride) | .alpha.-Endosulfan (Endosulfan 1) | .beta.-BHC (Benzenehexachloride) | .beta.-Endosulfan (Endosulfan 2) | Acenaphthene | Anthracene | Endosulfan sulfate | Endrin | Endrin aldehyde | Fluoranthene | Fluorene | Pyrene
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	36
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Thirty-six water quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at eight locations in the Salton Sea. Of these total samples, none exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Criteria for the protection of human health when consuming organisms from aquatic systems were used for the following constituents: 2700 ug/l Acenaphthene, 0.014 ug/l alpha-BHC, 240 ug/l alpha-Endosulfan, 110000 ug/l Anthracene, 0.046 ug/l beta-BHC, 240 ug/l beta-Endosulfan, 240 ug/l Endosulfan Sulfate, 0.81 ug/l Endrin, 0.81 ug/l Endrin Aldehyde, 370 ug/l Fluoranthene, 14000 ug/l Fluorene, and 11000 ug/l Pyrene (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, Salton Sea GS10.
Temporal Representation:	Thirty-six water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sea NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).
LOE ID:	5109
Pollutant:	Arsenic | Benzo[a]anthracene | Cadmium | Chromium (total) | Chrysene (C1-C4) | Copper | Dieldrin | Endrin | Fluoranthene | Fluorene | Lead | Lindane/gamma Hexachlorocyclohexane (gamma-HCH) | Mercury | Naphthalene | Nickel | PCBs (Polychlorinated biphenyls) | Phenanthrene | Pyrene
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	36
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Thirty-six sediment quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at eight locations in the Salton Sea. Of these total samples, none exceeded the PEC (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	Consensus Based Sediment Quality Guideline Probable Effects Concentrations (PECs) for the protection of freshwater organisms to toxic effects were used for the following constituents: 33 mg/kg Arsenic, 1050 ug/kg Benz[a]anthrazene, 4.98 mg/kg Cadmium, 111 mg/kg Chromium, 1290 ug/kg Chrysene, 149 mg/kg Copper, 61.8 ug/g Dieldrin, 207 ug/kg Endrin, 2230 ug/kg Fluoranthene, 536 ug/kg Fluorene, 128 mg/kg Lead, 4.99 ug/kg Lindane/Hexachlorocyclohexane (HCH), 1.06 mg/kg Mercury, 561 ug/kg Naphthalene, 48.6 mg/kg Nickel, 676 ug/kg PCBs (Polychlorinated biphenyls), 1170 ug/kg Phenanthrene , 1520 ug/kg Pyrene (Macdonald et al, 2000).
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, Salton Sea GS10.
Temporal Representation:	Thirty-six sediment samples were collected. Sediment samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sa NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).
LOE ID:	5499
Pollutant:	Endrin
LOE Subgroup:	Pollutant-Tissue
Matrix:	Tissue
Fraction:	Total
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	31
Number of Exceedances:	0
Data and Information Type:	Fish tissue analysis
Data Used to Asses Water Quality:	Thirty-one fish fillet samples were taken at 3 locations in the sea. The fish samples were generally collected from 5/1980 through 11/2000. Of these total samples, none exceeded the OEHHA Screening Value. (TSMP, 2007).
Data Reference:	Data for organic and inorganic chemicals in fish and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7, collected and reported on the Toxic Substances Monitoring Program (TSMP) database. 1978-2000. State Water Resources Control Board (SWRCB). Sacramento, CA.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	Office of Environmental Health Hazard Assessment (OEHHA) Screening Value of 1000 ug/kg to protect human health when consuming fish (OEHHA, 1999).
Guideline Reference:	Prevalence of Selected Target Chemical Contaminants in Sport Fish From Two California Lakes: Public health designed screening study. Sacramento, CA: Office of Environmental Health Hazard Assessment
Spatial Representation:	Samples were collected from the following Salton Sea locations: from the North end, the South end, and the West Side.
Temporal Representation:	Fish tissue samples were generally collected from 5/1980 through 11/2000. Fish tissue samples were not collected from each location every sampling round. Thirty-one fish fillet samples of tilapia, bairdiella, orangemouth corvina, redbelly tilapia, Mozambique tilapia, and sargo were collected. Nine tilapia fillet composites samples were collected in the years 1984-85, (2)1996, 1997, (2)1998, and (2)2000. Five bairdiella fillet composite samples were collected in 1980, 1985, (2)1989, and 2000. Ten orangemouth corvina fillet composite samples were collected in the years (2)1981, 1984-87, (2)1991, 1997, and 1999. Two orangemouth corvina single fish fillet samples were collected in the year (2)1991. Two redbelly tilapia fillet composite samples were collected in the year (2)1995. One Mozambique tilapia fillet composite sample was collected in the year 1980. Two sargo fillet composite samples were collected in the years 1985, and 1991.
Environmental Conditions:
QAPP Information:	The field procedures are described in TSMP Data Reports and associated Appendices. CDFG's Laboratory applies Quality Assurance Program Plan procedures for laboratory Quality Assurance and Quality Control, as described in Rasmussen (1993).
QAPP Information Reference(s):	Toxic Substances Monitoring Program 1991 Data Report. 93-1WQ. State Water Resources Control Board (SWRCB), Division of Water Quality. Sacramento, CA.
LOE ID:	5516
Pollutant:	Endrin
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	Chemical monitoring of sediments
Data Used to Asses Water Quality:	One sediment sample was taken at 1 location in the sea. The sediment sample was collected on 12/10/1987. This sample did not exceed the PEC Criteria (TSMP, 2007).
Data Reference:	Data for organic and inorganic chemicals in fish and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7, collected and reported on the Toxic Substances Monitoring Program (TSMP) database. 1978-2000. State Water Resources Control Board (SWRCB). Sacramento, CA.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	Consensus Based Sediment Quality Guideline Probable Effect Concentration (PEC) of 207 ug/kg for the protection of freshwater organisms to toxic effects(Macdonald et al, 2000).
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	A sample was collected from the south end of the Salton Sea.
Temporal Representation:	One sediment samples was collected on 12/10/87 .
Environmental Conditions:
QAPP Information:	The field procedures are described in TSMP Data Reports and associated Appendices. CDFG's Laboratory applies Quality Assurance Program Plan procedures for laboratory Quality Assurance and Quality Control, as described in Rasmussen (1993).
QAPP Information Reference(s):	Toxic Substances Monitoring Program 1991 Data Report. 93-1WQ. State Water Resources Control Board (SWRCB), Division of Water Quality. Sacramento, CA.
LOE ID:	5612
Pollutant:	Endrin
LOE Subgroup:	Pollutant-Tissue
Matrix:	Tissue
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	31
Number of Exceedances:	0
Data and Information Type:	Fish tissue analysis
Data Used to Asses Water Quality:	Thirty-one fish fillet samples were taken at 3 locations in the sea. The fish samples were generally collected from 5/1980 through 11/2000. Of these total samples, none exceeded the NAS tissue guideline. (TSMP, 2007).
Data Reference:	Data for organic and inorganic chemicals in fish and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7, collected and reported on the Toxic Substances Monitoring Program (TSMP) database. 1978-2000. State Water Resources Control Board (SWRCB). Sacramento, CA.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	National Academy of Science (NAS) tissue guideline of 100 ug/kg for the protection of aquatic life uses (NAS, 1973).
Guideline Reference:	National Academy of Sciences. Water Quality Criteria 1972. EPA-R3-73-033. Washington, D.C.: U.S. Environmental Protection Agency
Spatial Representation:	Samples were collected from the following Salton Sea locations: from the North end, the South end, and the West Side.
Temporal Representation:	Fish tissue samples were generally collected from 5/1980 through 11/2000. Fish tissue samples were not collected from each location every sampling round. Thirty-one fish fillet samples of tilapia, bairdiella, orangemouth corvina, redbelly tilapia, Mozambique tilapia, and sargo were collected. Nine tilapia fillet composites samples were collected in the years 1984-85, (2)1996, 1997, (2)1998, and (2)2000. Five bairdiella fillet composite samples were collected in 1980, 1985, (2)1989, and 2000. Ten orangemouth corvina fillet composite samples were collected in the years (2)1981, 1984-87, (2)1991, 1997, and 1999. Two orangemouth corvina single fish fillet samples were collected in the year (2)1991. Two redbelly tilapia fillet composite samples were collected in the year (2)1995. One Mozambique tilapia fillet composite sample was collected in the year 1980. Two sargo fillet composite samples were collected in the years 1985, and 1991.
Environmental Conditions:
QAPP Information:	The field procedures are described in TSMP Data Reports and associated Appendices. CDFG's Laboratory applies Quality Assurance Program Plan procedures for laboratory Quality Assurance and Quality Control, as described in Rasmussen (1993).
QAPP Information Reference(s):	Toxic Substances Monitoring Program 1991 Data Report. 93-1WQ. State Water Resources Control Board (SWRCB), Division of Water Quality. Sacramento, CA.

DECISION ID	8450
Pollutant:	Endrin aldehyde
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. One line of evidence is available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 36 water samples exceeded the California Toxics Rule criteria and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8450

LOE ID:	5088
Pollutant:	.alpha.-BHC (Benzenehexachloride) | .alpha.-Endosulfan (Endosulfan 1) | .beta.-BHC (Benzenehexachloride) | .beta.-Endosulfan (Endosulfan 2) | Acenaphthene | Anthracene | Endosulfan sulfate | Endrin | Endrin aldehyde | Fluoranthene | Fluorene | Pyrene
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	36
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Thirty-six water quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at eight locations in the Salton Sea. Of these total samples, none exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Criteria for the protection of human health when consuming organisms from aquatic systems were used for the following constituents: 2700 ug/l Acenaphthene, 0.014 ug/l alpha-BHC, 240 ug/l alpha-Endosulfan, 110000 ug/l Anthracene, 0.046 ug/l beta-BHC, 240 ug/l beta-Endosulfan, 240 ug/l Endosulfan Sulfate, 0.81 ug/l Endrin, 0.81 ug/l Endrin Aldehyde, 370 ug/l Fluoranthene, 14000 ug/l Fluorene, and 11000 ug/l Pyrene (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, Salton Sea GS10.
Temporal Representation:	Thirty-six water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sea NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).

DECISION ID	8497
Pollutant:	Escherichia coli (E. Coli)
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under section 3.2 of the Listing Policy. Under section 3.2 a single line of evidence is necessary to assess listing status. Two lines of evidence are available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 24 water samples exceeded Basin Plan E. coli water quaity objectives and these do not exceed the allowable frequency listed in Table 3.2 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8497

LOE ID:	5111
Pollutant:	Escherichia coli (E. Coli)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Water Contact Recreation
Number of Samples:	24
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Twenty-four water quality samples were collected and analyzed biannually from 5/2002 through 11/2003 at six locations in the Salton Sea. Of these total samples, none exceeded the Basin Plan Objective (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	Basin Plan:In waters designated for water contact recreation (REC I) the maximum allowable E. coli density is 400 MPN/ 100 ml (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS7, Salton Sea GS9, Salton Sea GS10.
Temporal Representation:	Twenty-four water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 10/2004 from the Salton Sa NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).
LOE ID:	5114
Pollutant:	Escherichia coli (E. Coli)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Non-Contact Recreation
Number of Samples:	24
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Twenty-four water quality samples were collected and analyzed biannually from 5/2002 through 11/2003 at six locations in the Salton Sea. Of these total samples, none exceeded the Basin Plan Objective (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	Basin Plan:In waters designated for noncontact water recreation (REC II) the maximum allowable E. coli density is 2000 MPN/ 100 ml (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS7, Salton Sea GS9, Salton Sea GS10.
Temporal Representation:	Twenty-four water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 10/2004 from the Salton Sea NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).

DECISION ID	8498
Pollutant:	Ethion
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under section 3.5 of the Listing Policy. Under section 3.5 a single line of evidence is necessary to assess listing status. One line of evidence is available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 31 fish tissue samples exceeded the Office of Environmental Health Hazard Assessment fish tissue guideline and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8498

LOE ID:	5500
Pollutant:	Ethion
LOE Subgroup:	Pollutant-Tissue
Matrix:	Tissue
Fraction:	Total
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	31
Number of Exceedances:	0
Data and Information Type:	Fish tissue analysis
Data Used to Asses Water Quality:	Thirty-one fish fillet samples were taken at 3 locations in the sea. The fish samples were generally collected from 5/1980 through 11/2000. Of these total samples, none exceeded the OEHHA Screening Value. (TSMP, 2007).
Data Reference:	Data for organic and inorganic chemicals in fish and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7, collected and reported on the Toxic Substances Monitoring Program (TSMP) database. 1978-2000. State Water Resources Control Board (SWRCB). Sacramento, CA.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	Office of Environmental Health Hazard Assessment (OEHHA) Screening Value of 2000 ug/kg to protect human health when consuming fish (OEHHA, 1999).
Guideline Reference:	Prevalence of Selected Target Chemical Contaminants in Sport Fish From Two California Lakes: Public health designed screening study. Sacramento, CA: Office of Environmental Health Hazard Assessment
Spatial Representation:	Samples were collected from the following Salton Sea locations: from the North end, the South end, and the West Side.
Temporal Representation:	Fish tissue samples were generally collected from 5/1980 through 11/2000. Fish tissue samples were not collected from each location every sampling round. Thirty-one fish fillet samples of tilapia, bairdiella, orangemouth corvina, redbelly tilapia, Mozambique tilapia, and sargo were collected. Nine tilapia fillet composites samples were collected in the years 1984-85, (2)1996, 1997, (2)1998, and (2)2000. Five bairdiella fillet composite samples were collected in 1980, 1985, (2)1989, and 2000. Ten orangemouth corvina fillet composite samples were collected in the years (2)1981, 1984-87, (2)1991, 1997, and 1999. Two orangemouth corvina single fish fillet samples were collected in the year (2)1991. Two redbelly tilapia fillet composite samples were collected in the year (2)1995. One Mozambique tilapia fillet composite sample was collected in the year 1980. Two sargo fillet composite samples were collected in the years 1985, and 1991.
Environmental Conditions:
QAPP Information:	The field procedures are described in TSMP Data Reports and associated Appendices. CDFG's Laboratory applies Quality Assurance Program Plan procedures for laboratory Quality Assurance and Quality Control, as described in Rasmussen (1993).
QAPP Information Reference(s):	Toxic Substances Monitoring Program 1991 Data Report. 93-1WQ. State Water Resources Control Board (SWRCB), Division of Water Quality. Sacramento, CA.

DECISION ID	8484
Pollutant:	Ethylbenzene
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. One line of evidence is available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 29 water samples exceeded the California Toxics Rule criteria and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8484

LOE ID:	5091
Pollutant:	1,1,2-Trichloroethane | 1,2-Dichloroethane | 1,2-Dichloropropane | Bromoform | Chlorobenzene (mono) | Ethylbenzene | Hexachlorobutadiene | Tetrachloroethylene/PCE | Toluene | Trichloroethylene/TCE | m-Dichlorobenzene
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	29
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Twenty-nine water quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at six locations in the Salton Sea. Of these total samples, none exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Criteria for the protection of human health when consuming organisms from aquatic systems were used for the following constituents: 360 ug/l Bromoform, 21000 ug/l Chlorobenzene, 2600 ug/l m-Dichlorobenzene, 99 ug/l 1,2-Dichloroethane, 39 ug/l 1,2-Dichloropropane, 29000 ug/l Ethylbenzene, 50 ug/l Hexachlorobutadiene, 8.85 ug/l Tetrachloroethylene, 200000 ug/l Toluene, 42 ug/l 1,1,2-Trichloroethane, and 81 ug/l Trichloroethylene (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS7, and Salton Sea GS9.
Temporal Representation:	Twenty-nine water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sea NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).

DECISION ID	8451
Pollutant:	Fluoranthene
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under sections 3.1, and 3.6 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Two lines of evidence are available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 36 water samples exceeded the California Toxics Rule criteria. None of 36 sediment samples exceeded the sediment quality guideline. These do not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8451

LOE ID:	5088
Pollutant:	.alpha.-BHC (Benzenehexachloride) | .alpha.-Endosulfan (Endosulfan 1) | .beta.-BHC (Benzenehexachloride) | .beta.-Endosulfan (Endosulfan 2) | Acenaphthene | Anthracene | Endosulfan sulfate | Endrin | Endrin aldehyde | Fluoranthene | Fluorene | Pyrene
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	36
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Thirty-six water quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at eight locations in the Salton Sea. Of these total samples, none exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Criteria for the protection of human health when consuming organisms from aquatic systems were used for the following constituents: 2700 ug/l Acenaphthene, 0.014 ug/l alpha-BHC, 240 ug/l alpha-Endosulfan, 110000 ug/l Anthracene, 0.046 ug/l beta-BHC, 240 ug/l beta-Endosulfan, 240 ug/l Endosulfan Sulfate, 0.81 ug/l Endrin, 0.81 ug/l Endrin Aldehyde, 370 ug/l Fluoranthene, 14000 ug/l Fluorene, and 11000 ug/l Pyrene (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, Salton Sea GS10.
Temporal Representation:	Thirty-six water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sea NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).
LOE ID:	5109
Pollutant:	Arsenic | Benzo[a]anthracene | Cadmium | Chromium (total) | Chrysene (C1-C4) | Copper | Dieldrin | Endrin | Fluoranthene | Fluorene | Lead | Lindane/gamma Hexachlorocyclohexane (gamma-HCH) | Mercury | Naphthalene | Nickel | PCBs (Polychlorinated biphenyls) | Phenanthrene | Pyrene
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	36
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Thirty-six sediment quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at eight locations in the Salton Sea. Of these total samples, none exceeded the PEC (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	Consensus Based Sediment Quality Guideline Probable Effects Concentrations (PECs) for the protection of freshwater organisms to toxic effects were used for the following constituents: 33 mg/kg Arsenic, 1050 ug/kg Benz[a]anthrazene, 4.98 mg/kg Cadmium, 111 mg/kg Chromium, 1290 ug/kg Chrysene, 149 mg/kg Copper, 61.8 ug/g Dieldrin, 207 ug/kg Endrin, 2230 ug/kg Fluoranthene, 536 ug/kg Fluorene, 128 mg/kg Lead, 4.99 ug/kg Lindane/Hexachlorocyclohexane (HCH), 1.06 mg/kg Mercury, 561 ug/kg Naphthalene, 48.6 mg/kg Nickel, 676 ug/kg PCBs (Polychlorinated biphenyls), 1170 ug/kg Phenanthrene , 1520 ug/kg Pyrene (Macdonald et al, 2000).
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, Salton Sea GS10.
Temporal Representation:	Thirty-six sediment samples were collected. Sediment samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sa NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).

DECISION ID	8452
Pollutant:	Fluorene
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under sections 3.1 and 3.6 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Two lines of evidence are available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 36 water samples exceeded the California Toxics Rule criteria. None of 36 sediment samples exceeded the sediment quality guideline. These do not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8452

LOE ID:	5088
Pollutant:	.alpha.-BHC (Benzenehexachloride) | .alpha.-Endosulfan (Endosulfan 1) | .beta.-BHC (Benzenehexachloride) | .beta.-Endosulfan (Endosulfan 2) | Acenaphthene | Anthracene | Endosulfan sulfate | Endrin | Endrin aldehyde | Fluoranthene | Fluorene | Pyrene
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	36
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Thirty-six water quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at eight locations in the Salton Sea. Of these total samples, none exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Criteria for the protection of human health when consuming organisms from aquatic systems were used for the following constituents: 2700 ug/l Acenaphthene, 0.014 ug/l alpha-BHC, 240 ug/l alpha-Endosulfan, 110000 ug/l Anthracene, 0.046 ug/l beta-BHC, 240 ug/l beta-Endosulfan, 240 ug/l Endosulfan Sulfate, 0.81 ug/l Endrin, 0.81 ug/l Endrin Aldehyde, 370 ug/l Fluoranthene, 14000 ug/l Fluorene, and 11000 ug/l Pyrene (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, Salton Sea GS10.
Temporal Representation:	Thirty-six water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sea NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).
LOE ID:	5109
Pollutant:	Arsenic | Benzo[a]anthracene | Cadmium | Chromium (total) | Chrysene (C1-C4) | Copper | Dieldrin | Endrin | Fluoranthene | Fluorene | Lead | Lindane/gamma Hexachlorocyclohexane (gamma-HCH) | Mercury | Naphthalene | Nickel | PCBs (Polychlorinated biphenyls) | Phenanthrene | Pyrene
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	36
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Thirty-six sediment quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at eight locations in the Salton Sea. Of these total samples, none exceeded the PEC (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	Consensus Based Sediment Quality Guideline Probable Effects Concentrations (PECs) for the protection of freshwater organisms to toxic effects were used for the following constituents: 33 mg/kg Arsenic, 1050 ug/kg Benz[a]anthrazene, 4.98 mg/kg Cadmium, 111 mg/kg Chromium, 1290 ug/kg Chrysene, 149 mg/kg Copper, 61.8 ug/g Dieldrin, 207 ug/kg Endrin, 2230 ug/kg Fluoranthene, 536 ug/kg Fluorene, 128 mg/kg Lead, 4.99 ug/kg Lindane/Hexachlorocyclohexane (HCH), 1.06 mg/kg Mercury, 561 ug/kg Naphthalene, 48.6 mg/kg Nickel, 676 ug/kg PCBs (Polychlorinated biphenyls), 1170 ug/kg Phenanthrene , 1520 ug/kg Pyrene (Macdonald et al, 2000).
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, Salton Sea GS10.
Temporal Representation:	Thirty-six sediment samples were collected. Sediment samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sa NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).

DECISION ID	8461
Pollutant:	Heptachlor
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Two lines of evidence are available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 36 water samples exceeded the California Toxics Rule criteria. None of 31 fish tissue samples exceeded the National Academy of Sciences fish tissue guideline. These do not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8461

LOE ID:	5083
Pollutant:	.alpha.-Endosulfan (Endosulfan 1) | .beta.-Endosulfan (Endosulfan 2) | Aldrin | Chlordane | DDT | Dieldrin | Endrin | Heptachlor | Heptachlor epoxide
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	36
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Thirty-six water quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at eight locations in the Salton Sea. Of these total samples, none exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Criterion Maximum Concentrations (CMCs) for the protection of freshwater aquatic life uses were used for the following constituents: 3 ug/l Aldrin, 0.22 ug/l alpha Endosulfan, 0.22 ug/l beta-Endosulfan, 2.4 ug/l Chlordane, 1.1 ug/l DDT, 0.24 ug/l Dieldrin, 0.086 ug/l Endrin, 0.52 ug/l Heptachlor, and 0.52 ug/l Heptachlor epoxide (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, and Salton Sea GS10.
Temporal Representation:	Thirty-six water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sa NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).
LOE ID:	5622
Pollutant:	Heptachlor
LOE Subgroup:	Pollutant-Tissue
Matrix:	Tissue
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	31
Number of Exceedances:	0
Data and Information Type:	Fish tissue analysis
Data Used to Asses Water Quality:	Thirty-one fish fillet samples were taken at 3 locations in the sea. The fish samples were generally collected from 5/1980 through 11/2000. Of these total samples, none exceeded the NAS tissue guideline. (TSMP, 2007).
Data Reference:	Data for organic and inorganic chemicals in fish and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7, collected and reported on the Toxic Substances Monitoring Program (TSMP) database. 1978-2000. State Water Resources Control Board (SWRCB). Sacramento, CA.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	National Academy of Science (NAS) tissue guideline of 100 ug/kg for the protection of aquatic life uses (NAS, 1973).
Guideline Reference:	National Academy of Sciences. Water Quality Criteria 1972. EPA-R3-73-033. Washington, D.C.: U.S. Environmental Protection Agency
Spatial Representation:	Samples were collected from the following Salton Sea locations: from the North end, the South end and the West Side.
Temporal Representation:	Fish tissue samples were generally collected from 5/1980 through 11/2000. Fish tissue samples were not collected from each location every sampling round. Thirty-one fish fillet samples of tilapia, bairdiella, orangemouth corvina, redbelly tilapia, Mozambique tilapia, and sargo were collected. Nine tilapia fillet composites samples were collected in the years 1984-85, (2)1996, 1997, (2)1998, and (2)2000. Five bairdiella fillet composite samples were collected in 1980, 1985, (2)1989, and 2000. Ten orangemouth corvina fillet composite samples were collected in the years (2)1981, 1984-87, (2)1991, 1997, and 1999. Two orangemouth corvina single fish fillet samples were collected in the year (2)1991. Two redbelly tilapia fillet composite samples were collected in the year (2)1995. One Mozambique tilapia fillet composite sample was collected in the year 1980. Two sargo fillet composite samples were collected in the years 1985, and 1991.
Environmental Conditions:
QAPP Information:	The field procedures are described in TSMP Data Reports and associated Appendices. CDFG's Laboratory applies Quality Assurance Program Plan procedures for laboratory Quality Assurance and Quality Control, as described in Rasmussen (1993).
QAPP Information Reference(s):	Toxic Substances Monitoring Program 1991 Data Report. 93-1WQ. State Water Resources Control Board (SWRCB), Division of Water Quality. Sacramento, CA.

DECISION ID	8462
Pollutant:	Heptachlor epoxide
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under sections 3.1 and 3.5 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Three lines of evidence are available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 36 water samples exceeded the California Toxics Rule criteria. None of 6 fish tissue samples exceeded the Office of Environmental Health Hazard Assessment fish tissue criteria. None of 31 fish tissue samples exceeded the National Academy of Sciences fish tissue guideline. These do not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8462

LOE ID:	5630
Pollutant:	Heptachlor epoxide
LOE Subgroup:	Pollutant-Tissue
Matrix:	Tissue
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	31
Number of Exceedances:	0
Data and Information Type:	Fish tissue analysis
Data Used to Asses Water Quality:	Thirty-one fish fillet samples were taken at 3 locations in the sea. The fish samples were generally collected from 5/1980 through 11/2000. Of these total samples, none exceeded the NAS tissue guideline. (TSMP, 2007).
Data Reference:	Data for organic and inorganic chemicals in fish and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7, collected and reported on the Toxic Substances Monitoring Program (TSMP) database. 1978-2000. State Water Resources Control Board (SWRCB). Sacramento, CA.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	National Academy of Science (NAS) tissue guideline of 100 ug/kg for the protection of aquatic life uses (NAS, 1973).
Guideline Reference:	National Academy of Sciences. Water Quality Criteria 1972. EPA-R3-73-033. Washington, D.C.: U.S. Environmental Protection Agency
Spatial Representation:	Samples were collected from the Salton Sea from the North end, the South end and the West Side.
Temporal Representation:	Fish tissue samples were generally collected from 5/1980 through 11/2000. Fish tissue samples were not collected from each location every sampling round. Thirty-one fish fillet samples of tilapia, bairdiella, orangemouth corvina, redbelly tilapia, Mozambique tilapia, and sargo were collected. Nine tilapia fillet composites samples were collected in the years 1984-85, (2)1996, 1997, (2)1998, and (2)2000. Five bairdiella fillet composite samples were collected in 1980, 1985, (2)1989, and 2000. Ten orangemouth corvina fillet composite samples were collected in the years (2)1981, 1984-87, (2)1991, 1997, and 1999. Two orangemouth corvina single fish fillet samples were collected in the year (2)1991. Two redbelly tilapia fillet composite samples were collected in the year (2)1995. One Mozambique tilapia fillet composite sample was collected in the year 1980. Two sargo fillet composite samples were collected in the years 1985, and 1991.
Environmental Conditions:
QAPP Information:	The field procedures are described in TSMP Data Reports and associated Appendices. CDFG's Laboratory applies Quality Assurance Program Plan procedures for laboratory Quality Assurance and Quality Control, as described in Rasmussen (1993).
QAPP Information Reference(s):	Toxic Substances Monitoring Program 1991 Data Report. 93-1WQ. State Water Resources Control Board (SWRCB), Division of Water Quality. Sacramento, CA.
LOE ID:	5501
Pollutant:	Heptachlor epoxide
LOE Subgroup:	Pollutant-Tissue
Matrix:	Tissue
Fraction:	Total
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	6
Number of Exceedances:	0
Data and Information Type:	Fish tissue analysis
Data Used to Asses Water Quality:	Thirty-one fish fillet samples were taken at 3 locations in the sea. Twenty-five fish fillet samples could not be used in this assessment because the sample results were non-detect and the detection limit was above the criteria concentrations. The 6 fish fillet samples that were acceptable were generally collected from 11/1998 through 11/2000 collected at two locations. Of these total samples, none exceeded the OEHHA Screening Value (TSMP, 2007).
Data Reference:	Data for organic and inorganic chemicals in fish and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7, collected and reported on the Toxic Substances Monitoring Program (TSMP) database. 1978-2000. State Water Resources Control Board (SWRCB). Sacramento, CA.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	Office of Environmental Health Hazard Assessment (OEHHA) Screening Value of 4 ug/kg to protect human health when consuming fish (OEHHA, 1999).
Guideline Reference:	Prevalence of Selected Target Chemical Contaminants in Sport Fish From Two California Lakes: Public health designed screening study. Sacramento, CA: Office of Environmental Health Hazard Assessment
Spatial Representation:	Samples were collected from the following Salton Sea locations: from the North end, the South end, and the West Side.
Temporal Representation:	Fish tissue samples were generally collected from 5/1980 through 11/2000. Fish tissue samples were not collected from each location every sampling round. Thirty-one fish fillet samples of tilapia, bairdiella, orangemouth corvina, redbelly tilapia, Mozambique tilapia, and sargo were collected. Nine tilapia fillet composites samples were collected in the years 1984-85, (2)1996, 1997, (2)1998, and (2)2000. Five bairdiella fillet composite samples were collected in 1980, 1985, (2)1989, and 2000. Ten orangemouth corvina fillet composite samples were collected in the years (2)1981, 1984-87, (2)1991, 1997, and 1999. Two orangemouth corvina single fish fillet samples were collected in the year (2)1991. Two redbelly tilapia fillet composite samples were collected in the year (2)1995. One Mozambique tilapia fillet composite sample was collected in the year 1980. Two sargo fillet composite samples were collected in the years 1985, and 1991.
Environmental Conditions:
QAPP Information:	The field procedures are described in TSMP Data Reports and associated Appendices. CDFG's Laboratory applies Quality Assurance Program Plan procedures for laboratory Quality Assurance and Quality Control, as described in Rasmussen (1993).
QAPP Information Reference(s):	Toxic Substances Monitoring Program 1991 Data Report. 93-1WQ. State Water Resources Control Board (SWRCB), Division of Water Quality. Sacramento, CA.
LOE ID:	5083
Pollutant:	.alpha.-Endosulfan (Endosulfan 1) | .beta.-Endosulfan (Endosulfan 2) | Aldrin | Chlordane | DDT | Dieldrin | Endrin | Heptachlor | Heptachlor epoxide
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	36
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Thirty-six water quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at eight locations in the Salton Sea. Of these total samples, none exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Criterion Maximum Concentrations (CMCs) for the protection of freshwater aquatic life uses were used for the following constituents: 3 ug/l Aldrin, 0.22 ug/l alpha Endosulfan, 0.22 ug/l beta-Endosulfan, 2.4 ug/l Chlordane, 1.1 ug/l DDT, 0.24 ug/l Dieldrin, 0.086 ug/l Endrin, 0.52 ug/l Heptachlor, and 0.52 ug/l Heptachlor epoxide (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, and Salton Sea GS10.
Temporal Representation:	Thirty-six water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sa NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).

DECISION ID	8499
Pollutant:	Hexachlorobenzene/ HCB
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under section 3.5 of the Listing Policy. Under section 3.5 a single line of evidence is necessary to assess listing status. One line of evidence is available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 31 fish tissue samples exceeded the Office of Environmental Health Hazard Assessment fish tissue guideline and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8499

LOE ID:	5502
Pollutant:	Hexachlorobenzene/ HCB
LOE Subgroup:	Pollutant-Tissue
Matrix:	Tissue
Fraction:	Total
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	31
Number of Exceedances:	0
Data and Information Type:	Fish tissue analysis
Data Used to Asses Water Quality:	Thirty-one fish fillet samples were taken at 3 locations in the sea. The fish samples were generally collected from 5/1980 through 11/2000. Of these total samples, none exceeded the OEHHA Screening Value. (TSMP, 2007).
Data Reference:	Data for organic and inorganic chemicals in fish and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7, collected and reported on the Toxic Substances Monitoring Program (TSMP) database. 1978-2000. State Water Resources Control Board (SWRCB). Sacramento, CA.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	Office of Environmental Health Hazard Assessment (OEHHA) Screening Value of 20 ug/kg to protect human health when consuming fish (OEHHA, 1999).
Guideline Reference:	Prevalence of Selected Target Chemical Contaminants in Sport Fish From Two California Lakes: Public health designed screening study. Sacramento, CA: Office of Environmental Health Hazard Assessment
Spatial Representation:	Samples were collected from the following Salton Sea locations: from the North end, the South end, and the West Side.
Temporal Representation:	Fish tissue samples were generally collected from 5/1980 through 11/2000. Fish tissue samples were not collected from each location every sampling round. Thirty-one fish fillet samples of tilapia, bairdiella, orangemouth corvina, redbelly tilapia, Mozambique tilapia, and sargo were collected. Nine tilapia fillet composites samples were collected in the years 1984-85, (2)1996, 1997, (2)1998, and (2)2000. Five bairdiella fillet composite samples were collected in 1980, 1985, (2)1989, and 2000. Ten orangemouth corvina fillet composite samples were collected in the years (2)1981, 1984-87, (2)1991, 1997, and 1999. Two orangemouth corvina single fish fillet samples were collected in the year (2)1991. Two redbelly tilapia fillet composite samples were collected in the year (2)1995. One Mozambique tilapia fillet composite sample was collected in the year 1980. Two sargo fillet composite samples were collected in the years 1985, and 1991.
Environmental Conditions:
QAPP Information:	The field procedures are described in TSMP Data Reports and associated Appendices. CDFG's Laboratory applies Quality Assurance Program Plan procedures for laboratory Quality Assurance and Quality Control, as described in Rasmussen (1993).
QAPP Information Reference(s):	Toxic Substances Monitoring Program 1991 Data Report. 93-1WQ. State Water Resources Control Board (SWRCB), Division of Water Quality. Sacramento, CA.

DECISION ID	8485
Pollutant:	Hexachlorobutadiene
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. One line of evidence is available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 29 water samples exceeded the California Toxics Rule criteria and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8485

LOE ID:	5091
Pollutant:	1,1,2-Trichloroethane | 1,2-Dichloroethane | 1,2-Dichloropropane | Bromoform | Chlorobenzene (mono) | Ethylbenzene | Hexachlorobutadiene | Tetrachloroethylene/PCE | Toluene | Trichloroethylene/TCE | m-Dichlorobenzene
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	29
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Twenty-nine water quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at six locations in the Salton Sea. Of these total samples, none exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Criteria for the protection of human health when consuming organisms from aquatic systems were used for the following constituents: 360 ug/l Bromoform, 21000 ug/l Chlorobenzene, 2600 ug/l m-Dichlorobenzene, 99 ug/l 1,2-Dichloroethane, 39 ug/l 1,2-Dichloropropane, 29000 ug/l Ethylbenzene, 50 ug/l Hexachlorobutadiene, 8.85 ug/l Tetrachloroethylene, 200000 ug/l Toluene, 42 ug/l 1,1,2-Trichloroethane, and 81 ug/l Trichloroethylene (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS7, and Salton Sea GS9.
Temporal Representation:	Twenty-nine water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sea NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).

DECISION ID	8469
Pollutant:	Hexachlorocyclohexane (HCH) (mixture)
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under section 3.5 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. One line of evidence is available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 31 fish tissue samples exceeded the National Academy of Sciences fish tissue guideline and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8469

LOE ID:	6731
Pollutant:	Hexachlorocyclohexane (HCH) (mixture)
LOE Subgroup:	Pollutant-Tissue
Matrix:	Tissue
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	31
Number of Exceedances:	0
Data and Information Type:	Fish tissue analysis
Data Used to Asses Water Quality:	Thirty-one fish fillet samples were taken at 3 locations in the sea. The fish samples were generally collected from 5/1980 through 11/2000. Of these total samples, none exceeded the NAS tissue guideline. (TSMP, 2007).
Data Reference:	Data for organic and inorganic chemicals in fish and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7, collected and reported on the Toxic Substances Monitoring Program (TSMP) database. 1978-2000. State Water Resources Control Board (SWRCB). Sacramento, CA.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	National Academy of Science (NAS) tissue guideline of 100 ug/kg for the protection of aquatic life uses (NAS, 1973).
Guideline Reference:	National Academy of Sciences. Water Quality Criteria 1972. EPA-R3-73-033. Washington, D.C.: U.S. Environmental Protection Agency
Spatial Representation:	Samples were collected from the Salton Sea from the North end, the South end and the West Side.
Temporal Representation:	Fish tissue samples were generally collected from 5/1980 through 11/2000. Fish tissue samples were not collected from each location every sampling round. Thirty-one fish fillet samples of tilapia, bairdiella, orangemouth corvina, redbelly tilapia, Mozambique tilapia, and sargo were collected. Nine tilapia fillet composites samples were collected in the years 1984-85, (2)1996, 1997, (2)1998, and (2)2000. Five bairdiella fillet composite samples were collected in 1980, 1985, (2)1989, and 2000. Ten orangemouth corvina fillet composite samples were collected in the years (2)1981, 1984-87, (2)1991, 1997, and 1999. Two orangemouth corvina single fish fillet samples were collected in the year (2)1991. Two redbelly tilapia fillet composite samples were collected in the year (2)1995. One Mozambique tilapia fillet composite sample was collected in the year 1980. Two sargo fillet composite samples were collected in the years 1985, and 1991.
Environmental Conditions:
QAPP Information:	The field procedures are described in TSMP Data Reports and associated Appendices. CDFG's Laboratory applies Quality Assurance Program Plan procedures for laboratory Quality Assurance and Quality Control, as described in Rasmussen (1993).
QAPP Information Reference(s):	Toxic Substances Monitoring Program 1991 Data Report. 93-1WQ. State Water Resources Control Board (SWRCB), Division of Water Quality. Sacramento, CA.

DECISION ID	8467
Pollutant:	Lead
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under sections 3.1 and 3.6 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Three lines of evidence are available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 36 water samples exceeded the California Toxics Rule criteria. None of 49 sediment samples exceeded the sediment quality guideline. These do not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8467

LOE ID:	5109
Pollutant:	Arsenic | Benzo[a]anthracene | Cadmium | Chromium (total) | Chrysene (C1-C4) | Copper | Dieldrin | Endrin | Fluoranthene | Fluorene | Lead | Lindane/gamma Hexachlorocyclohexane (gamma-HCH) | Mercury | Naphthalene | Nickel | PCBs (Polychlorinated biphenyls) | Phenanthrene | Pyrene
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	36
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Thirty-six sediment quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at eight locations in the Salton Sea. Of these total samples, none exceeded the PEC (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	Consensus Based Sediment Quality Guideline Probable Effects Concentrations (PECs) for the protection of freshwater organisms to toxic effects were used for the following constituents: 33 mg/kg Arsenic, 1050 ug/kg Benz[a]anthrazene, 4.98 mg/kg Cadmium, 111 mg/kg Chromium, 1290 ug/kg Chrysene, 149 mg/kg Copper, 61.8 ug/g Dieldrin, 207 ug/kg Endrin, 2230 ug/kg Fluoranthene, 536 ug/kg Fluorene, 128 mg/kg Lead, 4.99 ug/kg Lindane/Hexachlorocyclohexane (HCH), 1.06 mg/kg Mercury, 561 ug/kg Naphthalene, 48.6 mg/kg Nickel, 676 ug/kg PCBs (Polychlorinated biphenyls), 1170 ug/kg Phenanthrene , 1520 ug/kg Pyrene (Macdonald et al, 2000).
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, Salton Sea GS10.
Temporal Representation:	Thirty-six sediment samples were collected. Sediment samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sa NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).
LOE ID:	6116
Pollutant:	Lead
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	13
Number of Exceedances:	0
Data and Information Type:	Other Agencies/Organizations provided monitoring data
Data Used to Asses Water Quality:	Thirteen sediment quality samples were taken at 10 locations in the Salton Sea, collected between 7/1998 and 10/2001. Out of these total samples, none exceeded the PEC Criteria (USGS, 2007).
Data Reference:	Data for organic and inorganic chemicals in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7, collected and reported on the National Water Information System (NWIS) Water Quality database. 1961-2005.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	Consensus Based Sediment Quality Guideline Probable Effects Concentration (PEC) Criteria 128 mg/kg for the protection of aquatic life uses (MacDonald et al, 2000).
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Samples were collected at the following Salton Sea locations: USGS Station No. 333006116031501 near the mouth of the Coachella Valley Storm Water Channel, USGS Station No. 332958116023501 in the Coachella Valley Storm Water Channel Delta, USGS Station No. 332908116011501 between North Basin and Coachella Valley Storm Water Channel, USGS Station No. 332637115512001 in Salt Creek Delta, USGS Station No. 331400115450001 near center of South Basin, USGS Station No. 331215115410001 between South Basin and New and Alamo River Deltas, USGS Station No. 330835115434501 in New River Delta, USGS Station No. 331023115473701 in San Felipe Creek Delta, USGS Station No. 330803115414001 near the mouth of New River, and USGS Station No. 331242115371401 near the mouth of Alamo River.
Temporal Representation:	Thirteen samples were collected. Samples were generally collected from 7/1998 through 10/2001. Seven samples were in 1998, 1 sample was collected in 1999, no samples were collected in 2000, and 5 samples were collected in 2001.
Environmental Conditions:
QAPP Information:	Assume samplers used standard USGS methods for sample collection (Wilde, variously dated). Assume analysts used standard analytical methods and quality assurance as described in (USGS, 2007).
QAPP Information Reference(s):	Data for organic and inorganic chemicals in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7, collected and reported on the National Water Information System (NWIS) Water Quality database. 1961-2005.
	Field measurements: U.S. Geological Survey Techniques of Water-Resources Investigations, book 9, chap. A6. In United States Geological Survey (USGS). Variously dated. National field manual for the collection of water-quality data: U.S. Geological Survey Techniques of Water-Resources Investigations, book 9, chaps. A1-A9, available online at http://pubs.water.usgs.gov/twri9A.
LOE ID:	5078
Pollutant:	Cadmium | Lead | Nickel | Zinc
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	36
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Thirty-six water quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at eight locations in the Salton Sea. Of these total samples, none exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Hardness Dependent Criterion Maximum Concentrations (CMCs) for the protection of freshwater aquatic life uses were used for the following constituents: Cadmium, Lead, Nickel, and Zinc (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, and Salton Sea GS10.
Temporal Representation:	Thirty-six water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sa NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).

DECISION ID	8468
Pollutant:	Lindane/gamma Hexachlorocyclohexane (gamma-HCH)
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under sections 3.5 and 3.6 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Four lines of evidence are available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 31 fish tissue samples exceeded the National Academy of Sciences or Office of Environmental Health Hazard Assessment fish tissue guidelines. None of 37 sediment samples exceeded the sediment quality guideline. These do not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8468

LOE ID:	6739
Pollutant:	Lindane/gamma Hexachlorocyclohexane (gamma-HCH)
LOE Subgroup:	Pollutant-Tissue
Matrix:	Tissue
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	31
Number of Exceedances:	0
Data and Information Type:	Fish tissue analysis
Data Used to Asses Water Quality:	Thirty-one fish fillet samples were taken at 3 locations in the sea. The fish samples were generally collected from 5/1980 through 11/2000. Of these total samples, none exceeded the NAS tissue guideline. (TSMP, 2007).
Data Reference:	Data for organic and inorganic chemicals in fish and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7, collected and reported on the Toxic Substances Monitoring Program (TSMP) database. 1978-2000. State Water Resources Control Board (SWRCB). Sacramento, CA.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	National Academy of Science (NAS) tissue guideline of 100 ug/kg for the protection of aquatic life uses (NAS, 1973).
Guideline Reference:	National Academy of Sciences. Water Quality Criteria 1972. EPA-R3-73-033. Washington, D.C.: U.S. Environmental Protection Agency
Spatial Representation:	Samples were collected from the following Salton Sea locations: from the North end, the South end, and the West Side.
Temporal Representation:	Fish tissue samples were generally collected from 5/1980 through 11/2000. Fish tissue samples were not collected from each location every sampling round. Thirty-one fish fillet samples of tilapia, bairdiella, orangemouth corvina, redbelly tilapia, Mozambique tilapia, and sargo were collected. Nine tilapia fillet composites samples were collected in the years 1984-85, (2)1996, 1997, (2)1998, and (2)2000. Five bairdiella fillet composite samples were collected in 1980, 1985, (2)1989, and 2000. Ten orangemouth corvina fillet composite samples were collected in the years (2)1981, 1984-87, (2)1991, 1997, and 1999. Two orangemouth corvina single fish fillet samples were collected in the year (2)1991. Two redbelly tilapia fillet composite samples were collected in the year (2)1995. One Mozambique tilapia fillet composite sample was collected in the year 1980. Two sargo fillet composite samples were collected in the years 1985, and 1991.
Environmental Conditions:
QAPP Information:	The field procedures are described in TSMP Data Reports and associated Appendices. CDFG's Laboratory applies Quality Assurance Program Plan procedures for laboratory Quality Assurance and Quality Control, as described in Rasmussen (1993).
QAPP Information Reference(s):	Toxic Substances Monitoring Program 1991 Data Report. 93-1WQ. State Water Resources Control Board (SWRCB), Division of Water Quality. Sacramento, CA.
LOE ID:	5109
Pollutant:	Arsenic | Benzo[a]anthracene | Cadmium | Chromium (total) | Chrysene (C1-C4) | Copper | Dieldrin | Endrin | Fluoranthene | Fluorene | Lead | Lindane/gamma Hexachlorocyclohexane (gamma-HCH) | Mercury | Naphthalene | Nickel | PCBs (Polychlorinated biphenyls) | Phenanthrene | Pyrene
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	36
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Thirty-six sediment quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at eight locations in the Salton Sea. Of these total samples, none exceeded the PEC (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	Consensus Based Sediment Quality Guideline Probable Effects Concentrations (PECs) for the protection of freshwater organisms to toxic effects were used for the following constituents: 33 mg/kg Arsenic, 1050 ug/kg Benz[a]anthrazene, 4.98 mg/kg Cadmium, 111 mg/kg Chromium, 1290 ug/kg Chrysene, 149 mg/kg Copper, 61.8 ug/g Dieldrin, 207 ug/kg Endrin, 2230 ug/kg Fluoranthene, 536 ug/kg Fluorene, 128 mg/kg Lead, 4.99 ug/kg Lindane/Hexachlorocyclohexane (HCH), 1.06 mg/kg Mercury, 561 ug/kg Naphthalene, 48.6 mg/kg Nickel, 676 ug/kg PCBs (Polychlorinated biphenyls), 1170 ug/kg Phenanthrene , 1520 ug/kg Pyrene (Macdonald et al, 2000).
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, Salton Sea GS10.
Temporal Representation:	Thirty-six sediment samples were collected. Sediment samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sa NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).
LOE ID:	5517
Pollutant:	Lindane/gamma Hexachlorocyclohexane (gamma-HCH)
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	Chemical monitoring of sediments
Data Used to Asses Water Quality:	One sediment sample was taken at 1 location in the sea. The sediment sample was collected on 12/10/1987. This sample did not exceed the PEC Criteria (TSMP, 2007).
Data Reference:	Data for organic and inorganic chemicals in fish and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7, collected and reported on the Toxic Substances Monitoring Program (TSMP) database. 1978-2000. State Water Resources Control Board (SWRCB). Sacramento, CA.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	Consensus Based Sediment Quality Guideline Probable Effect Concentration (PEC) of 4.99 ug/kg for the protection of freshwater organisms to toxic effects(Macdonald et al, 2000)
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	A sample was collected from the south end of the Salton Sea.
Temporal Representation:	One sediment samples was collected on 12/10/87 .
Environmental Conditions:
QAPP Information:	The field procedures are described in TSMP Data Reports and associated Appendices. CDFG's Laboratory applies Quality Assurance Program Plan procedures for laboratory Quality Assurance and Quality Control, as described in Rasmussen (1993).
QAPP Information Reference(s):	Toxic Substances Monitoring Program 1991 Data Report. 93-1WQ. State Water Resources Control Board (SWRCB), Division of Water Quality. Sacramento, CA.
LOE ID:	5503
Pollutant:	Lindane/gamma Hexachlorocyclohexane (gamma-HCH)
LOE Subgroup:	Pollutant-Tissue
Matrix:	Tissue
Fraction:	Total
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	31
Number of Exceedances:	0
Data and Information Type:	Fish tissue analysis
Data Used to Asses Water Quality:	Thirty-one fish fillet samples were taken at 3 locations in the sea. The fish samples were generally collected from 5/1980 through 11/2000. Of these total samples, none exceeded the OEHHA Screening Value. (TSMP, 2007).
Data Reference:	Data for organic and inorganic chemicals in fish and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7, collected and reported on the Toxic Substances Monitoring Program (TSMP) database. 1978-2000. State Water Resources Control Board (SWRCB). Sacramento, CA.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	Office of Environmental Health Hazard Assessment (OEHHA) Screening Value of 30 ug/kg to protect human health when consuming fish (OEHHA, 1999).
Guideline Reference:	Prevalence of Selected Target Chemical Contaminants in Sport Fish From Two California Lakes: Public health designed screening study. Sacramento, CA: Office of Environmental Health Hazard Assessment
Spatial Representation:	Samples were collected from the following Salton Sea locations: from the North end, the South end, and the West Side.
Temporal Representation:	Fish tissue samples were generally collected from 5/1980 through 11/2000. Fish tissue samples were not collected from each location every sampling round. Thirty-one fish fillet samples of tilapia, bairdiella, orangemouth corvina, redbelly tilapia, Mozambique tilapia, and sargo were collected. Nine tilapia fillet composites samples were collected in the years 1984-85, (2)1996, 1997, (2)1998, and (2)2000. Five bairdiella fillet composite samples were collected in 1980, 1985, (2)1989, and 2000. Ten orangemouth corvina fillet composite samples were collected in the years (2)1981, 1984-87, (2)1991, 1997, and 1999. Two orangemouth corvina single fish fillet samples were collected in the year (2)1991. Two redbelly tilapia fillet composite samples were collected in the year (2)1995. One Mozambique tilapia fillet composite sample was collected in the year 1980. Two sargo fillet composite samples were collected in the years 1985, and 1991.
Environmental Conditions:
QAPP Information:	The field procedures are described in TSMP Data Reports and associated Appendices. CDFG's Laboratory applies Quality Assurance Program Plan procedures for laboratory Quality Assurance and Quality Control, as described in Rasmussen (1993).
QAPP Information Reference(s):	Toxic Substances Monitoring Program 1991 Data Report. 93-1WQ. State Water Resources Control Board (SWRCB), Division of Water Quality. Sacramento, CA.

DECISION ID	8435
Pollutant:	Low Dissolved Oxygen
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Sources:	Source Unknown
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under section 3.2 of the Listing Policy. Under section 3.2 a single line of evidence is necessary to assess listing status. One line of evidence is available in the administrative record to assess this pollutant. Three of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Three out of five water samples exceeded the Basin Plan water quality objective and this does not exceed the allowable frequency listed in Table 3.2 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8435

LOE ID:	5236
Pollutant:	Low Dissolved Oxygen
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	5
Number of Exceedances:	3
Data and Information Type:	Other Agencies/Organizations provided monitoring data
Data Used to Asses Water Quality:	Five water quality measurements were taken at 5 locations in the Salton Sea, collected between 7/20/1998 and 7/22/1998. Out of these total measurements, 3 exceeded the Basin Plan Objective. The exceedences were found in measurements collected from 7/20/1998 through 7/21/1998 at 3 locations in the sea, near center of South Basin, between South Basin and New and Alamo River Deltas, and in San Felipe Creek Delta (USGS, 2007).
Data Reference:	Data for organic and inorganic chemicals in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7, collected and reported on the National Water Information System (NWIS) Water Quality database. 1961-2005.
Water Quality Objective/Criterion:	Basin Plan: The dissolved oxygen concentration shall not be reduced below the following minimum levels at any time: Water designated WARM 5 mg/l (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Measurements were collected at the following Salton Sea locations: USGS Station No. 332908116011501 between North Basin and Coachella Valley Storm Water Channel, USGS Station No. 332637115512001 in Salt Creek Delta, USGS Station No. 331400115450001 near center of South Basin, USGS Station No. 331215115410001 between South Basin and New and Alamo River Deltas, and USGS Station No. 331023115473701 in San Felipe Creek Delta.
Temporal Representation:	Five measurements were collected in 7/98. The exceedences were found in measurements collected from 7/20/1998 through 7/21/1998.
Environmental Conditions:
QAPP Information:	Assume samplers used standard USGS methods for sample collection (Wilde, variously dated). Assume analysts used standard analytical methods and quality assurance as described in (USGS, 2007).
QAPP Information Reference(s):	Data for organic and inorganic chemicals in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7, collected and reported on the National Water Information System (NWIS) Water Quality database. 1961-2005.
	Field measurements: U.S. Geological Survey Techniques of Water-Resources Investigations, book 9, chap. A6. In United States Geological Survey (USGS). Variously dated. National field manual for the collection of water-quality data: U.S. Geological Survey Techniques of Water-Resources Investigations, book 9, chaps. A1-A9, available online at http://pubs.water.usgs.gov/twri9A.

DECISION ID	8470
Pollutant:	Mercury
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under sections 3.1, 3.5, and 3.6 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Four lines of evidence are available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 34 water samples exceeded the California Toxics Rule Criteria protecting either aquatic life uses, or human health when consuming organisms from this water. None of 11 fish tissue samples exceeded the Office of Environmental Health Hazard Assessment fish tissue guideline. None of 36 sediment samples exceeded the sediment quality guideline. These do not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8470

LOE ID:	5080
Pollutant:	Mercury
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	34
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Thirty-four water quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at eight locations in the Salton Sea. Of these total samples, none exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Criterion Maximum Concentration (CMC) of 1.4 ug/l for the protection of freshwater aquatic life uses (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, and Salton Sea GS10.
Temporal Representation:	Thirty-four water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sa NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).
LOE ID:	5087
Pollutant:	Mercury
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	34
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Thirty-four water quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at eight locations in the Salton Sea. Of these total samples, none exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Criteria 0.051 ug/l for the protection of human health when consuming organisms from aquatic systems (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, and Salton Sea GS10.
Temporal Representation:	Thirty-four water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sea NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).
LOE ID:	5564
Pollutant:	Mercury
LOE Subgroup:	Pollutant-Tissue
Matrix:	Tissue
Fraction:	Total
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	11
Number of Exceedances:	0
Data and Information Type:	Fish tissue analysis
Data Used to Asses Water Quality:	Thirty-five fish fillet samples were taken at 3 locations in the sea. Twenty-four fish fillet sample results could not be used in this assessment because the sample were not analyzed for the analyte. The 11 fish fillet samples that were acceptable were generally collected from 8/1985 through 11/2000 at two locations. Of these total samples, none exceeded the OEHHA Screening Value (TSMP, 2007).
Data Reference:	Data for organic and inorganic chemicals in fish and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7, collected and reported on the Toxic Substances Monitoring Program (TSMP) database. 1978-2000. State Water Resources Control Board (SWRCB). Sacramento, CA.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	Office of Environmental Health Hazard Assessment (OEHHA) Screening Value of 0.3 mg/kg to protect human health when consuming fish (OEHHA, 1999).
Guideline Reference:	Prevalence of Selected Target Chemical Contaminants in Sport Fish From Two California Lakes: Public health designed screening study. Sacramento, CA: Office of Environmental Health Hazard Assessment
Spatial Representation:	Samples were collected from the following Salton Sea locations: from the North end, the South end, and the West Side.
Temporal Representation:	Fish tissue samples were generally collected from 6/1984 through 11/2000. Fish tissue samples were not collected from each location every sampling round. Thirty five fish fillet samples of bairdiella, orangemouth corvina, redbelly tilapia, tilapia, and sargo were collected.Five bairdiella fillet composite samples were collected in the years 1985, 1987, (2)1989, and 2000. Ten orangemouth corvina fillet composite samples were collected in the years 1984-87, (4)1991, 1997, and 1999. Six orangemouth corvine single fish fillet samples were collected in the year (6)1986. Two redbelly tilapia fillet composite samples were collected in year (2)1995. Nine tilapia fillet composite samples were collected in the years 1985,1987, (2)1996, 1997, (2)1998, and (2)2000. Three sargo fillet composite samples were collected in the years 1985, 1987, and 1991.
Environmental Conditions:
QAPP Information:	The field procedures are described in TSMP Data Reports and associated Appendices. CDFG's Laboratory applies Quality Assurance Program Plan procedures for laboratory Quality Assurance and Quality Control, as described in Rasmussen (1993).
QAPP Information Reference(s):	Toxic Substances Monitoring Program 1991 Data Report. 93-1WQ. State Water Resources Control Board (SWRCB), Division of Water Quality. Sacramento, CA.
LOE ID:	5109
Pollutant:	Arsenic | Benzo[a]anthracene | Cadmium | Chromium (total) | Chrysene (C1-C4) | Copper | Dieldrin | Endrin | Fluoranthene | Fluorene | Lead | Lindane/gamma Hexachlorocyclohexane (gamma-HCH) | Mercury | Naphthalene | Nickel | PCBs (Polychlorinated biphenyls) | Phenanthrene | Pyrene
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	36
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Thirty-six sediment quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at eight locations in the Salton Sea. Of these total samples, none exceeded the PEC (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	Consensus Based Sediment Quality Guideline Probable Effects Concentrations (PECs) for the protection of freshwater organisms to toxic effects were used for the following constituents: 33 mg/kg Arsenic, 1050 ug/kg Benz[a]anthrazene, 4.98 mg/kg Cadmium, 111 mg/kg Chromium, 1290 ug/kg Chrysene, 149 mg/kg Copper, 61.8 ug/g Dieldrin, 207 ug/kg Endrin, 2230 ug/kg Fluoranthene, 536 ug/kg Fluorene, 128 mg/kg Lead, 4.99 ug/kg Lindane/Hexachlorocyclohexane (HCH), 1.06 mg/kg Mercury, 561 ug/kg Naphthalene, 48.6 mg/kg Nickel, 676 ug/kg PCBs (Polychlorinated biphenyls), 1170 ug/kg Phenanthrene , 1520 ug/kg Pyrene (Macdonald et al, 2000).
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, Salton Sea GS10.
Temporal Representation:	Thirty-six sediment samples were collected. Sediment samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sa NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).

DECISION ID	8495
Pollutant:	Methyl bromide
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. One line of evidence is available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 4 water samples exceeded the California Toxics Rule criteria and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8495

LOE ID:	5098
Pollutant:	Dichloromethane | Methyl bromide | Vinyl chloride
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	4
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Four water quality samples were collected and analyzed biannually in 5/2002 at four locations in the Salton Sea. Of these total samples, none exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Criteria for the protection of human health when consuming organisms from aquatic systems were used for the following constituents:4000 ug/l Methyl Bromide, 16000 ug/l Dichloromethane, and 525 ug/l Vinyl Chloride (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea GS2, Salton Sea GS7, and Salton Sea GS9.
Temporal Representation:	Four water samples were collected. Water samples were collected and analyzed in 5/2002.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).

DECISION ID	8471
Pollutant:	Naphthalene
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under section 3.6 of the Listing Policy. Under section 3.6 a single line of evidence is necessary to assess listing status. One line of evidence is available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 36 sediment samples exceeded the sediment qualty guidelines and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8471

LOE ID:	5109
Pollutant:	Arsenic | Benzo[a]anthracene | Cadmium | Chromium (total) | Chrysene (C1-C4) | Copper | Dieldrin | Endrin | Fluoranthene | Fluorene | Lead | Lindane/gamma Hexachlorocyclohexane (gamma-HCH) | Mercury | Naphthalene | Nickel | PCBs (Polychlorinated biphenyls) | Phenanthrene | Pyrene
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	36
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Thirty-six sediment quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at eight locations in the Salton Sea. Of these total samples, none exceeded the PEC (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	Consensus Based Sediment Quality Guideline Probable Effects Concentrations (PECs) for the protection of freshwater organisms to toxic effects were used for the following constituents: 33 mg/kg Arsenic, 1050 ug/kg Benz[a]anthrazene, 4.98 mg/kg Cadmium, 111 mg/kg Chromium, 1290 ug/kg Chrysene, 149 mg/kg Copper, 61.8 ug/g Dieldrin, 207 ug/kg Endrin, 2230 ug/kg Fluoranthene, 536 ug/kg Fluorene, 128 mg/kg Lead, 4.99 ug/kg Lindane/Hexachlorocyclohexane (HCH), 1.06 mg/kg Mercury, 561 ug/kg Naphthalene, 48.6 mg/kg Nickel, 676 ug/kg PCBs (Polychlorinated biphenyls), 1170 ug/kg Phenanthrene , 1520 ug/kg Pyrene (Macdonald et al, 2000).
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, Salton Sea GS10.
Temporal Representation:	Thirty-six sediment samples were collected. Sediment samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sa NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).

DECISION ID	8472
Pollutant:	Nickel
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under sections 3.1 and 3.6 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Four lines of evidence are available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 36 water samples exceeded the California Toxics Rule criteria protecting either aquatic life uses, or human health when consuming organisms from this water. None of 50 sediment samples exceeded the sediment quality guideline. These do not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8472

LOE ID:	5078
Pollutant:	Cadmium | Lead | Nickel | Zinc
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	36
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Thirty-six water quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at eight locations in the Salton Sea. Of these total samples, none exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Hardness Dependent Criterion Maximum Concentrations (CMCs) for the protection of freshwater aquatic life uses were used for the following constituents: Cadmium, Lead, Nickel, and Zinc (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, and Salton Sea GS10.
Temporal Representation:	Thirty-six water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sa NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).
LOE ID:	5245
Pollutant:	Nickel
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	14
Number of Exceedances:	0
Data and Information Type:	Other Agencies/Organizations provided monitoring data
Data Used to Asses Water Quality:	Fourteen sediment quality samples were taken at 11 locations in the Salton Sea, generally collected from 7/1998 through 10/2001. Of these total samples , none exceeded the PEC Criteria (USGS, 2007).
Data Reference:	Data for organic and inorganic chemicals in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7, collected and reported on the National Water Information System (NWIS) Water Quality database. 1961-2005.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	Consensus Based Sediment Quality Guideline Probable Effects Concentration (PEC) Criteria 48.6 mg/kg for the protection of aquatic life uses (MacDonald et al, 2000).
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Samples were collected at the following Salton Sea locations: USGS Station No. 333006116031501 near the mouth of the Coachella Valley Storm Water Channel, USGS Station No. 332958116023501 in the Coachella Valley Storm Water Channel Delta, USGS Station No. 332908116011501 between North Basin and Coachella Valley Storm Water Channel, USGS Station No. 332637115512001 in Salt Creek Delta, USGS Station No. 331400115380001 in Alamo River Delta, USGS Station No. 331400115450001 near center of South Basin, USGS Station No. 331215115410001 between South Basin and New and Alamo River Deltas, USGS Station No. 330835115434501 in New River Delta, USGS Station No. 331023115473701 in San Felipe Creek Delta, USGS Station No. 330803115414001 near the mouth of New River, and USGS Station No. 331242115371401 near the mouth of Alamo River.
Temporal Representation:	Fourteen samples were collected. Samples were generally collected from 7/1998 through 10/2001. Seven samples were collected in 1998, 1 samples was collected in 1999, no samples were collected in 2000, and 6 samples were collected in 2001.
Environmental Conditions:
QAPP Information:	Assume samplers used standard USGS methods for sample collection (Wilde, variously dated). Assume analysts used standard analytical methods and quality assurance as described in (USGS, 2007).
QAPP Information Reference(s):	Data for organic and inorganic chemicals in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7, collected and reported on the National Water Information System (NWIS) Water Quality database. 1961-2005.
	Field measurements: U.S. Geological Survey Techniques of Water-Resources Investigations, book 9, chap. A6. In United States Geological Survey (USGS). Variously dated. National field manual for the collection of water-quality data: U.S. Geological Survey Techniques of Water-Resources Investigations, book 9, chaps. A1-A9, available online at http://pubs.water.usgs.gov/twri9A.
LOE ID:	5109
Pollutant:	Arsenic | Benzo[a]anthracene | Cadmium | Chromium (total) | Chrysene (C1-C4) | Copper | Dieldrin | Endrin | Fluoranthene | Fluorene | Lead | Lindane/gamma Hexachlorocyclohexane (gamma-HCH) | Mercury | Naphthalene | Nickel | PCBs (Polychlorinated biphenyls) | Phenanthrene | Pyrene
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	36
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Thirty-six sediment quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at eight locations in the Salton Sea. Of these total samples, none exceeded the PEC (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	Consensus Based Sediment Quality Guideline Probable Effects Concentrations (PECs) for the protection of freshwater organisms to toxic effects were used for the following constituents: 33 mg/kg Arsenic, 1050 ug/kg Benz[a]anthrazene, 4.98 mg/kg Cadmium, 111 mg/kg Chromium, 1290 ug/kg Chrysene, 149 mg/kg Copper, 61.8 ug/g Dieldrin, 207 ug/kg Endrin, 2230 ug/kg Fluoranthene, 536 ug/kg Fluorene, 128 mg/kg Lead, 4.99 ug/kg Lindane/Hexachlorocyclohexane (HCH), 1.06 mg/kg Mercury, 561 ug/kg Naphthalene, 48.6 mg/kg Nickel, 676 ug/kg PCBs (Polychlorinated biphenyls), 1170 ug/kg Phenanthrene , 1520 ug/kg Pyrene (Macdonald et al, 2000).
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, Salton Sea GS10.
Temporal Representation:	Thirty-six sediment samples were collected. Sediment samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sa NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).
LOE ID:	5086
Pollutant:	Nickel
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	36
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Thirty-six water quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at eight locations in the Salton Sea. Of these total samples, none exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Criteria 4600 ug/l for the protection of human health when consuming organisms from aquatic systems (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, and Salton Sea GS10.
Temporal Representation:	Thirty-six water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sa NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).

DECISION ID	8473
Pollutant:	PCBs (Polychlorinated biphenyls)
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under sections 3.5 and 3.6 of the Listing Policy. Under section 3.5 a single line of evidence is necessary to assess listing status. Three lines of evidence are available in the administrative record to assess this pollutant. One line of evidence received a Use Rating of Insufficient Information because there was only one sample reported in the line of evidence. According to Table 3.1 of the Listing Policy, the minimum number of samples required is 2. The results of this line of evidence will be combined with the results from another line of evidence in the Final Use Rating. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 31 fish tissue samples exceeded the National Academy of Sciences fish tissue guideline. None of 37 sediment samples exceeded the sediment quality guideline. These do not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8473

LOE ID:	5109
Pollutant:	Arsenic | Benzo[a]anthracene | Cadmium | Chromium (total) | Chrysene (C1-C4) | Copper | Dieldrin | Endrin | Fluoranthene | Fluorene | Lead | Lindane/gamma Hexachlorocyclohexane (gamma-HCH) | Mercury | Naphthalene | Nickel | PCBs (Polychlorinated biphenyls) | Phenanthrene | Pyrene
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	36
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Thirty-six sediment quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at eight locations in the Salton Sea. Of these total samples, none exceeded the PEC (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	Consensus Based Sediment Quality Guideline Probable Effects Concentrations (PECs) for the protection of freshwater organisms to toxic effects were used for the following constituents: 33 mg/kg Arsenic, 1050 ug/kg Benz[a]anthrazene, 4.98 mg/kg Cadmium, 111 mg/kg Chromium, 1290 ug/kg Chrysene, 149 mg/kg Copper, 61.8 ug/g Dieldrin, 207 ug/kg Endrin, 2230 ug/kg Fluoranthene, 536 ug/kg Fluorene, 128 mg/kg Lead, 4.99 ug/kg Lindane/Hexachlorocyclohexane (HCH), 1.06 mg/kg Mercury, 561 ug/kg Naphthalene, 48.6 mg/kg Nickel, 676 ug/kg PCBs (Polychlorinated biphenyls), 1170 ug/kg Phenanthrene , 1520 ug/kg Pyrene (Macdonald et al, 2000).
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, Salton Sea GS10.
Temporal Representation:	Thirty-six sediment samples were collected. Sediment samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sa NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).
LOE ID:	5518
Pollutant:	PCBs (Polychlorinated biphenyls)
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	Fish tissue analysis
Data Used to Asses Water Quality:	One sediment sample was taken at 1 location in the sea. The sediment sample was collected on 12/10/1987. This sample did not exceed the PEC Criteria (TSMP, 2007).
Data Reference:	Data for organic and inorganic chemicals in fish and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7, collected and reported on the Toxic Substances Monitoring Program (TSMP) database. 1978-2000. State Water Resources Control Board (SWRCB). Sacramento, CA.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	Consensus Based Sediment Quality Guideline Probable Effect Concentration (PEC) of 676 ug/kg for the protection of freshwater organisms to toxic effects(Macdonald et al, 2000).
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	A sample was collected from the south end of the Salton Sea.
Temporal Representation:	One sediment samples was collected on 12/10/87 .
Environmental Conditions:
QAPP Information:	The field procedures are described in TSMP Data Reports and associated Appendices. CDFG's Laboratory applies Quality Assurance Program Plan procedures for laboratory Quality Assurance and Quality Control, as described in Rasmussen (1993).
QAPP Information Reference(s):	Toxic Substances Monitoring Program 1991 Data Report. 93-1WQ. State Water Resources Control Board (SWRCB), Division of Water Quality. Sacramento, CA.
LOE ID:	5642
Pollutant:	PCBs (Polychlorinated biphenyls)
LOE Subgroup:	Pollutant-Tissue
Matrix:	Tissue
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	31
Number of Exceedances:	0
Data and Information Type:	Fish tissue analysis
Data Used to Asses Water Quality:	Thirty-one fish fillet samples were taken at 3 locations in the sea. The fish samples were generally collected from 5/1980 through 11/2000. Of these total samples, none exceeded the NAS tissue guideline. (TSMP, 2007).
Data Reference:	Data for organic and inorganic chemicals in fish and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7, collected and reported on the Toxic Substances Monitoring Program (TSMP) database. 1978-2000. State Water Resources Control Board (SWRCB). Sacramento, CA.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	National Academy of Science (NAS) tissue guideline of 500 ug/kg for the protection of aquatic life uses (NAS, 1973).
Guideline Reference:	National Academy of Sciences. Water Quality Criteria 1972. EPA-R3-73-033. Washington, D.C.: U.S. Environmental Protection Agency
Spatial Representation:	Samples were collected from the Salton Sea from the North end, the South end, and the West Side.
Temporal Representation:	Fish tissue samples were generally collected from 5/1980 through 11/2000. Fish tissue samples were not collected from each location every sampling round. Thirty-one fish fillet samples of tilapia, bairdiella, orangemouth corvina, redbelly tilapia, Mozambique tilapia, and sargo were collected. Nine tilapia fillet composites samples were collected in the years 1984-85, (2)1996, 1997, (2)1998, and (2)2000. Five bairdiella fillet composite samples were collected in 1980, 1985, (2)1989, and 2000. Ten orangemouth corvina fillet composite samples were collected in the years (2)1981, 1984-87, (2)1991, 1997, and 1999. Two orangemouth corvina single fish fillet samples were collected in the year (2)1991. Two redbelly tilapia fillet composite samples were collected in the year (2)1995. One Mozambique tilapia fillet composite sample was collected in the year 1980. Two sargo fillet composite samples were collected in the years 1985, and 1991.
Environmental Conditions:
QAPP Information:	The field procedures are described in TSMP Data Reports and associated Appendices. CDFG's Laboratory applies Quality Assurance Program Plan procedures for laboratory Quality Assurance and Quality Control, as described in Rasmussen (1993).
QAPP Information Reference(s):	Toxic Substances Monitoring Program 1991 Data Report. 93-1WQ. State Water Resources Control Board (SWRCB), Division of Water Quality. Sacramento, CA.

DECISION ID	8474
Pollutant:	Phenanthrene
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under section 3.6 of the Listing Policy. Under section 3.6 a single line of evidence is necessary to assess listing status. One line of evidence is available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 36 sediment samples exceeded the sediment quality guideline and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8474

LOE ID:	5109
Pollutant:	Arsenic | Benzo[a]anthracene | Cadmium | Chromium (total) | Chrysene (C1-C4) | Copper | Dieldrin | Endrin | Fluoranthene | Fluorene | Lead | Lindane/gamma Hexachlorocyclohexane (gamma-HCH) | Mercury | Naphthalene | Nickel | PCBs (Polychlorinated biphenyls) | Phenanthrene | Pyrene
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	36
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Thirty-six sediment quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at eight locations in the Salton Sea. Of these total samples, none exceeded the PEC (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	Consensus Based Sediment Quality Guideline Probable Effects Concentrations (PECs) for the protection of freshwater organisms to toxic effects were used for the following constituents: 33 mg/kg Arsenic, 1050 ug/kg Benz[a]anthrazene, 4.98 mg/kg Cadmium, 111 mg/kg Chromium, 1290 ug/kg Chrysene, 149 mg/kg Copper, 61.8 ug/g Dieldrin, 207 ug/kg Endrin, 2230 ug/kg Fluoranthene, 536 ug/kg Fluorene, 128 mg/kg Lead, 4.99 ug/kg Lindane/Hexachlorocyclohexane (HCH), 1.06 mg/kg Mercury, 561 ug/kg Naphthalene, 48.6 mg/kg Nickel, 676 ug/kg PCBs (Polychlorinated biphenyls), 1170 ug/kg Phenanthrene , 1520 ug/kg Pyrene (Macdonald et al, 2000).
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, Salton Sea GS10.
Temporal Representation:	Thirty-six sediment samples were collected. Sediment samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sa NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).

DECISION ID	8455
Pollutant:	Pyrene
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under sections 3.1 and 3.6 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Two lines of evidence are available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 36 water samples exceeded the California Toxics Rule criteria, and none of 36 sediment samples exceeded the sediment quality guideline. These do not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8455

LOE ID:	5088
Pollutant:	.alpha.-BHC (Benzenehexachloride) | .alpha.-Endosulfan (Endosulfan 1) | .beta.-BHC (Benzenehexachloride) | .beta.-Endosulfan (Endosulfan 2) | Acenaphthene | Anthracene | Endosulfan sulfate | Endrin | Endrin aldehyde | Fluoranthene | Fluorene | Pyrene
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	36
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Thirty-six water quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at eight locations in the Salton Sea. Of these total samples, none exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Criteria for the protection of human health when consuming organisms from aquatic systems were used for the following constituents: 2700 ug/l Acenaphthene, 0.014 ug/l alpha-BHC, 240 ug/l alpha-Endosulfan, 110000 ug/l Anthracene, 0.046 ug/l beta-BHC, 240 ug/l beta-Endosulfan, 240 ug/l Endosulfan Sulfate, 0.81 ug/l Endrin, 0.81 ug/l Endrin Aldehyde, 370 ug/l Fluoranthene, 14000 ug/l Fluorene, and 11000 ug/l Pyrene (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, Salton Sea GS10.
Temporal Representation:	Thirty-six water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sea NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).
LOE ID:	5109
Pollutant:	Arsenic | Benzo[a]anthracene | Cadmium | Chromium (total) | Chrysene (C1-C4) | Copper | Dieldrin | Endrin | Fluoranthene | Fluorene | Lead | Lindane/gamma Hexachlorocyclohexane (gamma-HCH) | Mercury | Naphthalene | Nickel | PCBs (Polychlorinated biphenyls) | Phenanthrene | Pyrene
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	36
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Thirty-six sediment quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at eight locations in the Salton Sea. Of these total samples, none exceeded the PEC (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	Consensus Based Sediment Quality Guideline Probable Effects Concentrations (PECs) for the protection of freshwater organisms to toxic effects were used for the following constituents: 33 mg/kg Arsenic, 1050 ug/kg Benz[a]anthrazene, 4.98 mg/kg Cadmium, 111 mg/kg Chromium, 1290 ug/kg Chrysene, 149 mg/kg Copper, 61.8 ug/g Dieldrin, 207 ug/kg Endrin, 2230 ug/kg Fluoranthene, 536 ug/kg Fluorene, 128 mg/kg Lead, 4.99 ug/kg Lindane/Hexachlorocyclohexane (HCH), 1.06 mg/kg Mercury, 561 ug/kg Naphthalene, 48.6 mg/kg Nickel, 676 ug/kg PCBs (Polychlorinated biphenyls), 1170 ug/kg Phenanthrene , 1520 ug/kg Pyrene (Macdonald et al, 2000).
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, Salton Sea GS10.
Temporal Representation:	Thirty-six sediment samples were collected. Sediment samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sa NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).

DECISION ID	8501
Pollutant:	Silver
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. One line of evidence is available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 36 water samples exceeded the California Toxics Rule criteria and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8501

LOE ID:	5079
Pollutant:	Silver
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	36
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Thirty-six water quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at eight locations in the Salton Sea. Of these total samples, none exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Hardness Dependent Criterion Maximum Concentration (CMC) for the protection of freshwater aquatic life uses (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, and Salton Sea GS10.
Temporal Representation:	Thirty-six water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sa NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).

DECISION ID	8486
Pollutant:	Tetrachloroethylene/PCE
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. One line of evidence is available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 29 water samples exceeded the California Toxics Rule criteria and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8486

LOE ID:	5091
Pollutant:	1,1,2-Trichloroethane | 1,2-Dichloroethane | 1,2-Dichloropropane | Bromoform | Chlorobenzene (mono) | Ethylbenzene | Hexachlorobutadiene | Tetrachloroethylene/PCE | Toluene | Trichloroethylene/TCE | m-Dichlorobenzene
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	29
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Twenty-nine water quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at six locations in the Salton Sea. Of these total samples, none exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Criteria for the protection of human health when consuming organisms from aquatic systems were used for the following constituents: 360 ug/l Bromoform, 21000 ug/l Chlorobenzene, 2600 ug/l m-Dichlorobenzene, 99 ug/l 1,2-Dichloroethane, 39 ug/l 1,2-Dichloropropane, 29000 ug/l Ethylbenzene, 50 ug/l Hexachlorobutadiene, 8.85 ug/l Tetrachloroethylene, 200000 ug/l Toluene, 42 ug/l 1,1,2-Trichloroethane, and 81 ug/l Trichloroethylene (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS7, and Salton Sea GS9.
Temporal Representation:	Twenty-nine water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sea NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).

DECISION ID	8487
Pollutant:	Toluene
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. One line of evidence is available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 29 water samples exceeded the California Toxics Rule criteria and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8487

LOE ID:	5091
Pollutant:	1,1,2-Trichloroethane | 1,2-Dichloroethane | 1,2-Dichloropropane | Bromoform | Chlorobenzene (mono) | Ethylbenzene | Hexachlorobutadiene | Tetrachloroethylene/PCE | Toluene | Trichloroethylene/TCE | m-Dichlorobenzene
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	29
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Twenty-nine water quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at six locations in the Salton Sea. Of these total samples, none exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Criteria for the protection of human health when consuming organisms from aquatic systems were used for the following constituents: 360 ug/l Bromoform, 21000 ug/l Chlorobenzene, 2600 ug/l m-Dichlorobenzene, 99 ug/l 1,2-Dichloroethane, 39 ug/l 1,2-Dichloropropane, 29000 ug/l Ethylbenzene, 50 ug/l Hexachlorobutadiene, 8.85 ug/l Tetrachloroethylene, 200000 ug/l Toluene, 42 ug/l 1,1,2-Trichloroethane, and 81 ug/l Trichloroethylene (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS7, and Salton Sea GS9.
Temporal Representation:	Twenty-nine water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sea NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).

DECISION ID	8502
Pollutant:	Toxaphene
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under section 3.5 of the Listing Policy. Under section 3.5 a single line of evidence is necessary to assess listing status. Two lines of evidence are available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 6 fish tissue samples exceeded the Office of Environmental Health Hazard Assessment fish tissue guideline. None of 31 fish tissue samples exceeded the National Academy of Sciences fish tissue guideline. These do not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8502

LOE ID:	5505
Pollutant:	Toxaphene
LOE Subgroup:	Pollutant-Tissue
Matrix:	Tissue
Fraction:	Total
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	6
Number of Exceedances:	0
Data and Information Type:	Fish tissue analysis
Data Used to Asses Water Quality:	Thirty-one fish fillet samples were taken at 3 locations in the sea. Twenty-five fish fillet samples could not be used in this assessment because the sample results were non-detect and the detection limit was above the criteria concentrations. The 6 fish fillet samples that were acceptable were generally collected from 11/1998 through 11/2000 collected at two locations. Of these total samples, none exceeded the OEHHA Screening Value (TSMP, 2007).
Data Reference:	Data for organic and inorganic chemicals in fish and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7, collected and reported on the Toxic Substances Monitoring Program (TSMP) database. 1978-2000. State Water Resources Control Board (SWRCB). Sacramento, CA.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	Office of Environmental Health Hazard Assessment (OEHHA) Screening Value of 30 ug/kg to protect human health when consuming fish (OEHHA, 1999).
Guideline Reference:	Prevalence of Selected Target Chemical Contaminants in Sport Fish From Two California Lakes: Public health designed screening study. Sacramento, CA: Office of Environmental Health Hazard Assessment
Spatial Representation:	Samples were collected from the following Salton Sea locations: from the North end, the South end, and the West Side.
Temporal Representation:	Fish tissue samples were generally collected from 5/1980 through 11/2000. Fish tissue samples were not collected from each location every sampling round. Thirty-one fish fillet samples of tilapia, bairdiella, orangemouth corvina, redbelly tilapia, Mozambique tilapia, and sargo were collected. Nine tilapia fillet composites samples were collected in the years 1984-85, (2)1996, 1997, (2)1998, and (2)2000. Five bairdiella fillet composite samples were collected in 1980, 1985, (2)1989, and 2000. Ten orangemouth corvina fillet composite samples were collected in the years (2)1981, 1984-87, (2)1991, 1997, and 1999. Two orangemouth corvina single fish fillet samples were collected in the year (2)1991. Two redbelly tilapia fillet composite samples were collected in the year (2)1995. One Mozambique tilapia fillet composite sample was collected in the year 1980. Two sargo fillet composite samples were collected in the years 1985, and 1991.
Environmental Conditions:
QAPP Information:	The field procedures are described in TSMP Data Reports and associated Appendices. CDFG's Laboratory applies Quality Assurance Program Plan procedures for laboratory Quality Assurance and Quality Control, as described in Rasmussen (1993).
QAPP Information Reference(s):	Toxic Substances Monitoring Program 1991 Data Report. 93-1WQ. State Water Resources Control Board (SWRCB), Division of Water Quality. Sacramento, CA.
LOE ID:	5654
Pollutant:	Toxaphene
LOE Subgroup:	Pollutant-Tissue
Matrix:	Tissue
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	31
Number of Exceedances:	0
Data and Information Type:	Fish tissue analysis
Data Used to Asses Water Quality:	Thirty-one fish fillet samples were taken at 3 locations in the sea. The fish samples were generally collected from 5/1980 through 11/2000. Of these total samples, none exceeded the NAS tissue guideline. (TSMP, 2007).
Data Reference:	Data for organic and inorganic chemicals in fish and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7, collected and reported on the Toxic Substances Monitoring Program (TSMP) database. 1978-2000. State Water Resources Control Board (SWRCB). Sacramento, CA.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	National Academy of Science (NAS) tissue guideline of 100 ug/kg for the protection of aquatic life uses (NAS, 1973).
Guideline Reference:	National Academy of Sciences. Water Quality Criteria 1972. EPA-R3-73-033. Washington, D.C.: U.S. Environmental Protection Agency
Spatial Representation:	Samples were collected from the Salton Sea from the North end, the South end and the West Side.
Temporal Representation:	Fish tissue samples were generally collected from 5/1980 through 11/2000. Fish tissue samples were not collected from each location every sampling round. Thirty-one fish fillet samples of tilapia, bairdiella, orangemouth corvina, redbelly tilapia, Mozambique tilapia, and sargo were collected. Nine tilapia fillet composites samples were collected in the years 1984-85, (2)1996, 1997, (2)1998, and (2)2000. Five bairdiella fillet composite samples were collected in 1980, 1985, (2)1989, and 2000. Ten orangemouth corvina fillet composite samples were collected in the years (2)1981, 1984-87, (2)1991, 1997, and 1999. Two orangemouth corvina single fish fillet samples were collected in the year (2)1991. Two redbelly tilapia fillet composite samples were collected in the year (2)1995. One Mozambique tilapia fillet composite sample was collected in the year 1980. Two sargo fillet composite samples were collected in the years 1985, and 1991.
Environmental Conditions:
QAPP Information:	The field procedures are described in TSMP Data Reports and associated Appendices. CDFG's Laboratory applies Quality Assurance Program Plan procedures for laboratory Quality Assurance and Quality Control, as described in Rasmussen (1993).
QAPP Information Reference(s):	Toxic Substances Monitoring Program 1991 Data Report. 93-1WQ. State Water Resources Control Board (SWRCB), Division of Water Quality. Sacramento, CA.

DECISION ID	8489
Pollutant:	Trichloroethylene/TCE
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. One line of evidence is available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 29 water samples exceeded the California Toxics Rule criteria and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8489

LOE ID:	5091
Pollutant:	1,1,2-Trichloroethane | 1,2-Dichloroethane | 1,2-Dichloropropane | Bromoform | Chlorobenzene (mono) | Ethylbenzene | Hexachlorobutadiene | Tetrachloroethylene/PCE | Toluene | Trichloroethylene/TCE | m-Dichlorobenzene
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	29
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Twenty-nine water quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at six locations in the Salton Sea. Of these total samples, none exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Criteria for the protection of human health when consuming organisms from aquatic systems were used for the following constituents: 360 ug/l Bromoform, 21000 ug/l Chlorobenzene, 2600 ug/l m-Dichlorobenzene, 99 ug/l 1,2-Dichloroethane, 39 ug/l 1,2-Dichloropropane, 29000 ug/l Ethylbenzene, 50 ug/l Hexachlorobutadiene, 8.85 ug/l Tetrachloroethylene, 200000 ug/l Toluene, 42 ug/l 1,1,2-Trichloroethane, and 81 ug/l Trichloroethylene (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS7, and Salton Sea GS9.
Temporal Representation:	Twenty-nine water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sea NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).

DECISION ID	8496
Pollutant:	Vinyl chloride
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. One line of evidence is available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 4 water samples exceeded the California Toxics Rule criteria and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8496

LOE ID:	5098
Pollutant:	Dichloromethane | Methyl bromide | Vinyl chloride
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	4
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Four water quality samples were collected and analyzed biannually in 5/2002 at four locations in the Salton Sea. Of these total samples, none exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Criteria for the protection of human health when consuming organisms from aquatic systems were used for the following constituents:4000 ug/l Methyl Bromide, 16000 ug/l Dichloromethane, and 525 ug/l Vinyl Chloride (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea GS2, Salton Sea GS7, and Salton Sea GS9.
Temporal Representation:	Four water samples were collected. Water samples were collected and analyzed in 5/2002.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).

DECISION ID	8490
Pollutant:	Zinc
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under sections 3.1 and 3.6 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Three lines of evidence are available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 36 water samples exceeded the California Toxics Rule criteria. None of 49 sediment samples exceeded the sediment quality guideline. These do not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8490

LOE ID:	5289
Pollutant:	Zinc
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	13
Number of Exceedances:	0
Data and Information Type:	Other Agencies/Organizations provided monitoring data
Data Used to Asses Water Quality:	Thirteen sediment quality samples were taken at 10 locations in the Salton Sea, collected between 7/1998 and 10/2001. Out of these total samples, none exceeded the PEC Criteria (USGS, 2007).
Data Reference:	Data for organic and inorganic chemicals in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7, collected and reported on the National Water Information System (NWIS) Water Quality database. 1961-2005.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	Consensus Based Sediment Quality Guideline Probable Effects Concentration (PEC) Criteria 459 mg/kg for the protection of aquatic life uses (MacDonald et al, 2000).
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Samples were collected at the following Salton Sea locations: USGS Station No. 333006116031501 near the mouth of the Coachella Valley Storm Water Channel, USGS Station No. 332958116023501 in the Coachella Valley Storm Water Channel Delta, USGS Station No. 332908116011501 between North Basin and Coachella Valley Storm Water Channel, USGS Station No. 332637115512001 in Salt Creek Delta, USGS Station No. 331400115450001 near center of South Basin, USGS Station No. 331215115410001 between South Basin and New and Alamo River Deltas, USGS Station No. 330835115434501 in New River Delta, USGS Station No. 331023115473701 in San Felipe Creek Delta, USGS Station No. 330803115414001 near the mouth of New River, and USGS Station No. 331242115371401 near the mouth of Alamo River.
Temporal Representation:	Thirteen samples were collected. Samples were generally collected from 7/1998 through 10/2001. Seven samples were in 1998, 1 sample was collected in 1999, no samples were collected in 2000, and 5 samples were collected in 2001.
Environmental Conditions:
QAPP Information:	Assume samplers used standard USGS methods for sample collection (Wilde, variously dated). Assume analysts used standard analytical methods and quality assurance as described in (USGS, 2007).
QAPP Information Reference(s):	Data for organic and inorganic chemicals in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7, collected and reported on the National Water Information System (NWIS) Water Quality database. 1961-2005.
	Field measurements: U.S. Geological Survey Techniques of Water-Resources Investigations, book 9, chap. A6. In United States Geological Survey (USGS). Variously dated. National field manual for the collection of water-quality data: U.S. Geological Survey Techniques of Water-Resources Investigations, book 9, chaps. A1-A9, available online at http://pubs.water.usgs.gov/twri9A.
LOE ID:	5078
Pollutant:	Cadmium | Lead | Nickel | Zinc
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	36
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Thirty-six water quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at eight locations in the Salton Sea. Of these total samples, none exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Hardness Dependent Criterion Maximum Concentrations (CMCs) for the protection of freshwater aquatic life uses were used for the following constituents: Cadmium, Lead, Nickel, and Zinc (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, and Salton Sea GS10.
Temporal Representation:	Thirty-six water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sa NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).
LOE ID:	4970
Pollutant:	Zinc
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	36
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Thirty-six sediment quality samples were generally collected and analyzed biannually from 5/2002 through 5/2005 at 8 locations in the Salton Sea. Of these total samples, none exceeded the PEC (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	Consensus Based Sediment Quality Guideline Probable Effects Concentration (PEC) of 459 mg/kg for the protection of freshwater organisms to toxic effects (Macdonald et al, 2000).
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, Salton Sea GS10.
Temporal Representation:	Thirty-six sediment samples were collected. Sediment samples were generally collected and analyzed biannually from 5/2002 through 5/2005. Samples were usually collected in May and October. Samples were not collected from each site every sampling event.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).

DECISION ID	8479
Pollutant:	m-Dichlorobenzene
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. One line of evidence is available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 29 water samples exceeded the California Toxics Rule criteria and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8479

LOE ID:	5091
Pollutant:	1,1,2-Trichloroethane | 1,2-Dichloroethane | 1,2-Dichloropropane | Bromoform | Chlorobenzene (mono) | Ethylbenzene | Hexachlorobutadiene | Tetrachloroethylene/PCE | Toluene | Trichloroethylene/TCE | m-Dichlorobenzene
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	29
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Twenty-nine water quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at six locations in the Salton Sea. Of these total samples, none exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Criteria for the protection of human health when consuming organisms from aquatic systems were used for the following constituents: 360 ug/l Bromoform, 21000 ug/l Chlorobenzene, 2600 ug/l m-Dichlorobenzene, 99 ug/l 1,2-Dichloroethane, 39 ug/l 1,2-Dichloropropane, 29000 ug/l Ethylbenzene, 50 ug/l Hexachlorobutadiene, 8.85 ug/l Tetrachloroethylene, 200000 ug/l Toluene, 42 ug/l 1,1,2-Trichloroethane, and 81 ug/l Trichloroethylene (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS7, and Salton Sea GS9.
Temporal Representation:	Twenty-nine water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sea NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).

DECISION ID	8480
Pollutant:	o-Dichlorobenzene
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. One line of evidence is available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 29 water samples exceeded the California Toxics Rule criteria and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8480

LOE ID:	5097
Pollutant:	o-Dichlorobenzene
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	29
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Twenty-nine water quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at six locations in the Salton Sea. Of these total samples, none exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Criteria of 17000 ug/l for the protection of human health when consuming organisms from aquatic systems (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS7, and Salton Sea GS9.
Temporal Representation:	Twenty-nine water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sea NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).

DECISION ID	8481
Pollutant:	p-Dichlorobenzene (DCB)
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. One line of evidence is available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 29 water samples exceeded the California Toxics Rule criteria and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8481

LOE ID:	5090
Pollutant:	p-Dichlorobenzene (DCB)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	29
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Twenty-nine water quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at six locations in the Salton Sea. Of these total samples, none exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Criteria 2600 ug/l for the protection of human health when consuming organisms from aquatic systems (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS7, and Salton Sea GS9.
Temporal Representation:	Twenty-nine water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sea NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).

DECISION ID	8500
Pollutant:	pH
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under section 3.2 of the Listing Policy. Under section 3.2 a single line of evidence is necessary to assess listing status. Two lines of evidence are available in the administrative record to assess this pollutant. Three of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Three of 56 samples exceeded the Basin plan water quality objective and this does not exceed the allowable frequency listed in Table 3.2 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8500

LOE ID:	4916
Pollutant:	pH (high)
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	35
Number of Exceedances:	3
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Thirty-five water quality measurements were generally collected biannually from 5/2002 through 5/2005, at 8 locations in the Salton Sea. Of these total measurements, 3 exceeded the Basin Plan Objective. The exceedences were found in measurements collected on 4/10/2003, and 5/11/2005 from two different locations in the Salton Sea (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	Basin Plan: Since the regional waters are somewhat alkaline, pH shall range from 6.0-9.0 (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, Salton Sea GS10.
Temporal Representation:	Thirty-five water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sea NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).
LOE ID:	5334
Pollutant:	pH
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	21
Number of Exceedances:	0
Data and Information Type:	Other Agencies/Organizations provided monitoring data
Data Used to Asses Water Quality:	Twenty-one water quality measurements were taken at 10 locations in the Salton Sea, generally collected from 7/1998 through 9/2002. Of these total measurements , none exceeded the Basin Plan Objective (USGS, 2007).
Data Reference:	Data for organic and inorganic chemicals in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7, collected and reported on the National Water Information System (NWIS) Water Quality database. 1961-2005.
Water Quality Objective/Criterion:	Basin Plan: Since the regional waters are somewhat alkaline, pH shall range from 6.0-9.0 (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Measurements were collected at the following Salton Sea locations: USGS Station No. 333006116031501 near the mouth of the Coachella Valley Storm Water Channel, USGS Station No. 332958116023501 in the Coachella Valley Storm Water Channel Delta, USGS Station No. 332908116011501 between North Basin and Coachella Valley Storm Water Channel, USGS Station No. 332637115512001 in Salt Creek Delta, USGS Station No. 331400115450001 near center of South Basin, USGS Station No. 331215115410001 between South Basin and New and Alamo River Deltas, USGS Station No. 330835115434501 in New River Delta, USGS Station No. 331023115473701 in San Felipe Creek Delta, USGS Station No. 330803115414001 near the mouth of New River, and USGS Station No. 331242115371401 near the mouth of Alamo River.
Temporal Representation:	Twenty-one measurements were collected. Measurements were collected from 7/1998 through 9/2002. Seven measurements were collected from 1998, no measurements were collected from 1999, no measurements were collected in 2000, 5 measurements were collected in 2001, and 9 measurements were collected in 2002.
Environmental Conditions:
QAPP Information:	Assume samplers used standard USGS methods for sample collection (Wilde, variously dated). Assume analysts used standard analytical methods and quality assurance as described in (USGS, 2007).
QAPP Information Reference(s):	Data for organic and inorganic chemicals in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7, collected and reported on the National Water Information System (NWIS) Water Quality database. 1961-2005.
	Field measurements: U.S. Geological Survey Techniques of Water-Resources Investigations, book 9, chap. A6. In United States Geological Survey (USGS). Variously dated. National field manual for the collection of water-quality data: U.S. Geological Survey Techniques of Water-Resources Investigations, book 9, chaps. A1-A9, available online at http://pubs.water.usgs.gov/twri9A.

DECISION ID	8493
Pollutant:	ppDDE
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. One line of evidence is available in the administrative record to assess this pollutant. One line of evidence received a Use Rating of Insufficient Information because there was only one sample reported in the line of evidence. According to Table 3.1 of the Listing Policy, the minimum number of samples required is 2. One of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. One of 1 sediment sample exceeded the sediment quality guideline and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8493

LOE ID:	4876
Pollutant:	ppDDE
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Thirty-six water samples were taken at eight locations on the Salton Sea. Thirty-five water sample results could not be used in this assessment because the sample results were non-detect and the detection limit was above the criteria concentration. The one acceptable water sample, collected near the center of the Salton Sea (GS9) location on 4/10/2003, exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Criteria of 0.00059 ug/l for the protection of human health when consuming organisms from aquatic systems (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, Salton Sea GS10.
Temporal Representation:	Thirty-six water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sea NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).

DECISION ID	8431
Pollutant:	Arsenic
Final Listing Decision:	List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Sources:	Source Unknown
Expected TMDL Completion Date:	2021
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is considered for placement on the section 303(d) list under sections 3.1, 3.5, and 3.6 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Five lines of evidence are available in the administrative record to assess this pollutant. No water samples exceed the water quality objective. When compared to the U.S. Fish and Wildlife Service 250 ug/l threshold for aquatic life, there were no exceedances out of 36 total water samples taken over all the sampling years. There were 5 fish tissue samples that exceed the water quality objective. When compared to the OEHHA 1 ug/kg threshold for consumption, there were 5 exceedances out of 9 fish tissue samples taken over all the sampling years. No sediment samples exceed the water quality objective. When compared to the sediment quality guideline 33 mg/kg threshold, there were no exceedances out of 48 total sediment samples taken over all the sampling years Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification for placing this water segment-pollutant combination on the section 303(d) list. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. At a minimum, 5 out of 9 fish tissue samples exceeded the Office of Environmental Health Hazard Assessment fish tissue guideline used to interpret the water quality objective and this exceeds the allowable frequency calculated from the equation in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should be placed on the section 303(d) list because applicable water quality standards are exceeded and a pollutant contributes to or causes the problem.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8431

LOE ID:	5286
Pollutant:	Arsenic
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	12
Number of Exceedances:	0
Data and Information Type:	Other Agencies/Organizations provided monitoring data
Data Used to Asses Water Quality:	Twelve sediment quality samples were taken at 10 locations in the Salton Sea, collected between 7/1998 and 10/2001. Out of these total samples, none exceeded the PEC Criteria (USGS, 2007).
Data Reference:	Data for organic and inorganic chemicals in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7, collected and reported on the National Water Information System (NWIS) Water Quality database. 1961-2005.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	Consensus Based Sediment Quality Guideline Probable Effects Concentration (PEC) Criteria 33 mg/kg for the protection of aquatic life uses (MacDonald et al, 2000).
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Samples were collected at the following Salton Sea locations: USGS Station No. 333006116031501 near the mouth of the Coachella Valley Storm Water Channel, USGS Station No. 332958116023501 in the Coachella Valley Storm Water Channel Delta, USGS Station No. 332908116011501 between North Basin and Coachella Valley Storm Water Channel, USGS Station No. 332637115512001 in Salt Creek Delta, USGS Station No. 331400115450001 near center of South Basin, USGS Station No. 331215115410001 between South Basin and New and Alamo River Deltas, USGS Station No. 330835115434501 in New River Delta, USGS Station No. 331023115473701 in San Felipe Creek Delta, USGS Station No. 330803115414001 near the mouth of New River, and USGS Station No. 331242115371401 near the mouth of Alamo River.
Temporal Representation:	Twelve samples were collected. Samples were generally collected from 7/1998 through 10/2001. Seven samples were in 1998, 1 sample was collected in 1999, no samples were collected in 2000, and 5 samples were collected in 2001.
Environmental Conditions:
QAPP Information:	Assume samplers used standard USGS methods for sample collection (Wilde, variously dated). Assume analysts used standard analytical methods and quality assurance as described in (USGS, 2007).
QAPP Information Reference(s):	Data for organic and inorganic chemicals in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7, collected and reported on the National Water Information System (NWIS) Water Quality database. 1961-2005.
	Field measurements: U.S. Geological Survey Techniques of Water-Resources Investigations, book 9, chap. A6. In United States Geological Survey (USGS). Variously dated. National field manual for the collection of water-quality data: U.S. Geological Survey Techniques of Water-Resources Investigations, book 9, chaps. A1-A9, available online at http://pubs.water.usgs.gov/twri9A.
LOE ID:	5109
Pollutant:	Arsenic | Benzo[a]anthracene | Cadmium | Chromium (total) | Chrysene (C1-C4) | Copper | Dieldrin | Endrin | Fluoranthene | Fluorene | Lead | Lindane/gamma Hexachlorocyclohexane (gamma-HCH) | Mercury | Naphthalene | Nickel | PCBs (Polychlorinated biphenyls) | Phenanthrene | Pyrene
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	36
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Thirty-six sediment quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at eight locations in the Salton Sea. Of these total samples, none exceeded the PEC (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	Consensus Based Sediment Quality Guideline Probable Effects Concentrations (PECs) for the protection of freshwater organisms to toxic effects were used for the following constituents: 33 mg/kg Arsenic, 1050 ug/kg Benz[a]anthrazene, 4.98 mg/kg Cadmium, 111 mg/kg Chromium, 1290 ug/kg Chrysene, 149 mg/kg Copper, 61.8 ug/g Dieldrin, 207 ug/kg Endrin, 2230 ug/kg Fluoranthene, 536 ug/kg Fluorene, 128 mg/kg Lead, 4.99 ug/kg Lindane/Hexachlorocyclohexane (HCH), 1.06 mg/kg Mercury, 561 ug/kg Naphthalene, 48.6 mg/kg Nickel, 676 ug/kg PCBs (Polychlorinated biphenyls), 1170 ug/kg Phenanthrene , 1520 ug/kg Pyrene (Macdonald et al, 2000).
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, Salton Sea GS10.
Temporal Representation:	Thirty-six sediment samples were collected. Sediment samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sa NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).
LOE ID:	5429
Pollutant:	Arsenic
LOE Subgroup:	Pollutant-Tissue
Matrix:	Tissue
Fraction:	Total
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	9
Number of Exceedances:	5
Data and Information Type:	Fish tissue analysis
Data Used to Asses Water Quality:	Thirty-five fish fillet samples were taken at 3 locations in the sea. Twenty-six fish fillet sample results could not be used in this assessment because the sample were not analyzed for the analyte. The 9 fish fillet samples that were acceptable were generally collected from 8/1985 through 11/2000 at two locations. Of these total samples, 5 fillet samples collected at 2 locations exceeded the OEHHA Screening Value. At the South location exceedences were found in 1 bairdiella fillet composite sample collected on 11/09/2000, and 3 tilapia fillet composite samples collected on 11/11/1998, and (2)11/09/2000. At the North location an exceedence was found in 1 tilapia fillet composite sample collected on 11/10/1998 (TSMP, 2007).
Data Reference:	Data for organic and inorganic chemicals in fish and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7, collected and reported on the Toxic Substances Monitoring Program (TSMP) database. 1978-2000. State Water Resources Control Board (SWRCB). Sacramento, CA.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	Office of Environmental Health Hazard Assessment (OEHHA) Screening Value of 1 mg/kg to protect human health when consuming fish (OEHHA, 1999).
Guideline Reference:	Prevalence of Selected Target Chemical Contaminants in Sport Fish From Two California Lakes: Public health designed screening study. Sacramento, CA: Office of Environmental Health Hazard Assessment
Spatial Representation:	Samples were collected from the following Salton Sea locations: from the North end, the South end and the West Side.
Temporal Representation:	Fish tissue samples were generally collected from 6/1984 through 11/2000. Fish tissue samples were not collected from each location every sampling round. Thirty five fish fillet samples of bairdiella, orangemouth corvina, redbelly tilapia, tilapia, and sargo were collected.Five bairdiella fillet composite samples were collected in the years 1985, 1987, (2)1989, and 2000. Ten orangemouth corvina fillet composite samples were collected in the years 1984-87, (4)1991, 1997, and 1999. Six orangemouth corvine single fish fillet samples were collected in the year (6)1986. Two redbelly tilapia fillet composite samples were collected in year (2)1995. Nine tilapia fillet composite samples were collected in the years 1985,1987, (2)1996, 1997, (2)1998, and (2)2000. Three sargo fillet composite samples were collected in the years 1985, 1987, and 1991. The exceedences were found in samples collected from 11/10/1998 through 11/09/2000.
Environmental Conditions:
QAPP Information:	The field procedures are described in TSMP Data Reports and associated Appendices. CDFG's Laboratory applies a Quality Assurance Program Plan procedures for laboratory Quality Assurance and Quality Control, as described in Rasmussen (1993).
QAPP Information Reference(s):	Toxic Substances Monitoring Program 1991 Data Report. 93-1WQ. State Water Resources Control Board (SWRCB), Division of Water Quality. Sacramento, CA.
LOE ID:	5099
Pollutant:	Arsenic | Copper
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	36
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Thirty-six water quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at eight locations in the Salton Sea. Of these total samples, none exceeded the USFWS Biological Effects Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	United State Fish and Wildlife Service (USFWS) Biological Effects Criteria for the protection of aquatic life uses were used for the following constituents: 0.25 mg/l Arsenic, and 15 mg/l Copper (USDOI, 1998).
Guideline Reference:	Guidelines for Interpretation of the Biological Effect of Selected Constituents in Biota, Water, and Sediment. US Department of Interior report.
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, Salton Sea GS10.
Temporal Representation:	Thirty-six water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sa NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).
LOE ID:	5075
Pollutant:	Arsenic
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	36
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Thirty-six water quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at eight locations in the Salton Sea. Of these total samples, none exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Criterion Maximum Concentration (CMC) of 340 ug/l for the protection of freshwater aquatic life uses (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, and Salton Sea GS10.
Temporal Representation:	Thirty-six water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sa NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).

DECISION ID	8432
Pollutant:	Chlorpyrifos
Final Listing Decision:	List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Sources:	Source Unknown
Expected TMDL Completion Date:	2021
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is considered for placement on the section 303(d) list under sections 3.1 and 3.5 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Two lines of evidence are available in the administrative record to assess this pollutant. There were 15 water samples that exceeded the water quality objectives. When compared to the California Department of Fish and Game 0.02 ug/l threshold for aquatic life, there were 15 exceedances out of 22 total water samples taken over all the sampling years. No fish tissue samples exceeded the water quality objective. When compared to the OEHHA 1000 ug/kg threshold for consumption, there were no exceedances out of 31 fish tissue samples taken over all the sampling year. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification for placing this water segment-pollutant combination on the section 303(d) list. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. At a minimum, 15 out of 22 water samples exceeded the California Department of Fish and Game evaluation guideline used to interpret the water quality objective and this exceeds the allowable frequency calculated from the equation in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should be placed on the section 303(d) list because applicable water quality standards are exceeded and a pollutant contributes to or causes the problem.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8432

LOE ID:	5496
Pollutant:	Chlorpyrifos
LOE Subgroup:	Pollutant-Tissue
Matrix:	Tissue
Fraction:	Total
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	31
Number of Exceedances:	0
Data and Information Type:	Fish tissue analysis
Data Used to Asses Water Quality:	Thirty-one fish fillet samples were taken at 3 locations in the sea. The fish samples were generally collected from 5/1980 through 11/2000. Of these total samples, none exceeded the OEHHA Screening Value. (TSMP, 2007).
Data Reference:	Data for organic and inorganic chemicals in fish and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7, collected and reported on the Toxic Substances Monitoring Program (TSMP) database. 1978-2000. State Water Resources Control Board (SWRCB). Sacramento, CA.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	Office of Environmental Health Hazard Assessment (OEHHA) Screening Value of 10000 ug/kg to protect human health when consuming fish (OEHHA, 1999).
Guideline Reference:	Prevalence of Selected Target Chemical Contaminants in Sport Fish From Two California Lakes: Public health designed screening study. Sacramento, CA: Office of Environmental Health Hazard Assessment
Spatial Representation:	Samples were collected from the following Salton Sea locations: from the North end, the South end, and the West Side.
Temporal Representation:	Fish tissue samples were generally collected from 5/1980 through 11/2000. Fish tissue samples were not collected from each location every sampling round. Thirty-one fish fillet samples of tilapia, bairdiella, orangemouth corvina, redbelly tilapia, Mozambique tilapia, and sargo were collected. Nine tilapia fillet composites samples were collected in the years 1984-85, (2)1996, 1997, (2)1998, and (2)2000. Five bairdiella fillet composite samples were collected in 1980, 1985, (2)1989, and 2000. Ten orangemouth corvina fillet composite samples were collected in the years (2)1981, 1984-87, (2)1991, 1997, and 1999. Two orangemouth corvina single fish fillet samples were collected in the year (2)1991. Two redbelly tilapia fillet composite samples were collected in the year (2)1995. One Mozambique tilapia fillet composite sample was collected in the year 1980. Two sargo fillet composite samples were collected in the years 1985, and 1991.
Environmental Conditions:
QAPP Information:	The field procedures are described in TSMP Data Reports and associated Appendices. CDFG's Laboratory applies Quality Assurance Program Plan procedures for laboratory Quality Assurance and Quality Control, as described in Rasmussen (1993).
QAPP Information Reference(s):	Toxic Substances Monitoring Program 1991 Data Report. 93-1WQ. State Water Resources Control Board (SWRCB), Division of Water Quality. Sacramento, CA.
LOE ID:	4806
Pollutant:	Chlorpyrifos
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	22
Number of Exceedances:	15
Data and Information Type:	Other Agencies/Organizations provided monitoring data
Data Used to Asses Water Quality:	Twenty-two water quality samples were collected every few weeks from 8/28/1996 through 4/15/1997 at three locations in the Salton Sea. Of these total samples, 15 exceeded the CDFG Criteria. The exceedences were found in samples collected on 8/28/1996, 9/10/1996, 10/01/1996, 10/31/1996, 11/12/1996, and 3/05/1997 (CDPR, 2007).
Data Reference:	Data for pesticides in water samples collected from waterbodies located in the Colorado River Basin-Region 7. Mar. 1993-Jun. 2005.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses.
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	California Department of Fish and Game (CDFG) Hazardous Assessment Criteria of 0.02 ug/l (1 hr. ave.) for freshwater aquatic life use protection (Siepmann and Finlayson, 2000).
Guideline Reference:	Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game
Spatial Representation:	Samples were collected from three sites in Salton Sea near the mouth of the Alamo River. The sites were approximately 0.14, 0.14, and 0.25 mi. offshore.
Temporal Representation:	The samples were collected every few weeks from 8/28/1996 through 4/15/1997. The exceedences were found in samples collected from 8/28/1996 through 3/05/1997.
Environmental Conditions:	The samples were collected every few weeks from August through November 1996 and from February through April 1997 to coincide with the pesticide application periods in the Imperial Valley (autumn and late winter/early spring) (Crepeau et al, 2002).
QAPP Information:	Investigators used USGS QA/QC in sample collection and analysis. Lab analysis was done by the USGS California District Organic Chemistry Laboratory in Sacramento, California (Crepeau, 2002).
QAPP Information Reference(s):	?Dissolved Pesticides in the Alamo River and the Salton Sea, California, 1996-97.? United States Geological Survey. Sacramento, CA. Open file report No. 02-232. http://water.usgs.gov/pubs/of/ofr02232/

DECISION ID	8433
Pollutant:	DDT
Final Listing Decision:	List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Sources:	Source Unknown
Expected TMDL Completion Date:	2021
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is considered for placement on the section 303(d) list under sections 3.1, 3.5, and 3.6 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Four lines of evidence are available in the administrative record to assess this pollutant. One lines of evidence received a Use Rating of Insufficient Information because there was only one sample reported in each line of evidence. According to Table 3.1 of the Listing Policy, the minimum number of samples required is 2. The results of these lines of evidence will be combined with each other in the Final Use Rating. No water samples exceed a water quality objective. When compared to the CTR 1.1 ug/l threshold for aquatic life, there were no exceedances out of 36 total water samples taken over all the sampling years. There were 23 fish tissue samples that exceeded water quality objectives. When compared to the OEHHA 21 ug/kg threshold for consumption, there were 23 exceedances out of 31 total fish tissue samples taken over all the sampling years. When compared to the NAS 1000 ug/kg threshold for aquatic life, there were no exceedances out of 31 fish tissue samples taken. No sediment samples exceed a water quality objective. When compared to the sediment quality guideline 62.9 ug/kg threshold, there were no exceedance out of 1 total sediment samples taken over all the sampling years. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification for placing this water segment-pollutant combination on the section 303(d) list. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. At a minimum, 23 out of 31 fish tissue samples exceeded the Office of Environmental Health Hazard Assessment fish tissue guideline used to interpret the water quality objective and this exceeds the allowable frequency calculated from the equation in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should be placed on the section 303(d) list because applicable water quality standards are exceeded and a pollutant contributes to or causes the problem.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8433

LOE ID:	5514
Pollutant:	DDT
LOE Subgroup:	Pollutant-Sediment
Matrix:	Sediment
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	Chemical monitoring of sediments
Data Used to Asses Water Quality:	One sediment sample was taken at 1 location in the sea. The sediment sample was collected on 12/10/1987. This sample did not exceed the PEC Criteria (TSMP, 2007).
Data Reference:	Data for organic and inorganic chemicals in fish and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7, collected and reported on the Toxic Substances Monitoring Program (TSMP) database. 1978-2000. State Water Resources Control Board (SWRCB). Sacramento, CA.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	Consensus Based Sediment Quality Guideline Probable Effect Concentration (PEC) of 62.9 ug/kg for the protection of freshwater organisms to toxic effects(Macdonald et al, 2000).
Guideline Reference:	Development and evaluation of consensus-based sediment quality guidelines for freshwater ecosystems. Environmental Contamination and Toxicology. 39: 20-31
Spatial Representation:	A sample was collected from the south end of the Salton Sea.
Temporal Representation:	One sediment samples was collected on 12/10/87 .
Environmental Conditions:
QAPP Information:	The field procedures are described in TSMP Data Reports and associated Appendices. CDFG's Laboratory applies Quality Assurance Program Plan procedures for laboratory Quality Assurance and Quality Control, as described in Rasmussen (1993).
QAPP Information Reference(s):	Toxic Substances Monitoring Program 1991 Data Report. 93-1WQ. State Water Resources Control Board (SWRCB), Division of Water Quality. Sacramento, CA.
LOE ID:	5586
Pollutant:	DDT
LOE Subgroup:	Pollutant-Tissue
Matrix:	Tissue
Fraction:	Total
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	31
Number of Exceedances:	0
Data and Information Type:	Fish tissue analysis
Data Used to Asses Water Quality:	Thirty-one fish fillet samples were taken at 3 locations in the sea. The fish samples were generally collected from 5/1980 through 11/2000. Of these total samples, none exceeded the NAS tissue guideline. (TSMP, 2007).
Data Reference:	Data for organic and inorganic chemicals in fish and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7, collected and reported on the Toxic Substances Monitoring Program (TSMP) database. 1978-2000. State Water Resources Control Board (SWRCB). Sacramento, CA.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	National Academy of Science (NAS) tissue guideline of 1000 ug/kg for the protection of aquatic life uses (NAS, 1973).
Guideline Reference:	National Academy of Sciences. Water Quality Criteria 1972. EPA-R3-73-033. Washington, D.C.: U.S. Environmental Protection Agency
Spatial Representation:	Samples were collected from the Salton Sea from the North end, the South end, and the West Side.
Temporal Representation:	Fish tissue samples were generally collected from 5/1980 through 11/2000. Fish tissue samples were not collected from each location every sampling round. Thirty-one fish fillet samples of tilapia, bairdiella, orangemouth corvina, redbelly tilapia, Mozambique tilapia, and sargo were collected. Nine tilapia fillet composites samples were collected in the years 1984-85, (2)1996, 1997, (2)1998, and (2)2000. Five bairdiella fillet composite samples were collected in the years 1980, 1985, (2)1989, and 2000. Ten orangemouth corvina fillet composite samples were collected in the years (2)1981, 1984-87, (2)1991, 1997, and 1999. Two orangemouth corvina single fish fillet samples were collected in the years (2)1991. Two redbelly tilapia fillet composite samples were collected in the years (2)1995. One Mozambique tilapia fillet composite sample was collected in the year 1980. Two sargo fillet composite samples were collected in the years 1985, and 1991.
Environmental Conditions:
QAPP Information:	The field procedures are described in TSMP Data Reports and associated Appendices. CDFG's Laboratory applies Quality Assurance Program Plan procedures for laboratory Quality Assurance and Quality Control, as described in Rasmussen (1993).
QAPP Information Reference(s):	Toxic Substances Monitoring Program 1991 Data Report. 93-1WQ. State Water Resources Control Board (SWRCB), Division of Water Quality. Sacramento, CA.
LOE ID:	5427
Pollutant:	DDT
LOE Subgroup:	Pollutant-Tissue
Matrix:	Tissue
Fraction:	Total
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	31
Number of Exceedances:	23
Data and Information Type:	Fish tissue analysis
Data Used to Asses Water Quality:	Thirty-one fish fillet samples were taken at 3 locations in the sea. The fish samples were generally collected from 5/1980 through 11/2000. Of these total samples, 23 fillet samples collected at 3 locations exceeded the OEHHA Fish Contaminant Goal. At the South location exceedances were found in; 5 bairdiella fillet composite samples collected on 5/21/1980, 8/06/1985, (2)11/01/1989, and 11/09/2000; 5 orangemouth corvina fillet composite samples collected on 5/24/1981, 8/06/1985, 10/07/1987, 5/15/1991 and 12/06/1999; 3 tilapia fillet composite samples collected on 8/07/1985, 11/20/1997, and 11/11/1998, and; 2 Mozambique tilapia fillet composite samples collected on 5/21/1980, and 8/06/1985. At the West Shore location exceedances were found in 2 orangemouth corvina fillet composite samples collected on 6/20/1984, and 5/19/1986. At the North location exceedances were found in; 3 orangemouth corvina fillet composite samples collected on 5/29/1981, 5/30/1991, and 11/18/1997; 2 orangemouth corvina single fish fillet samples collected on 5/30/1991, and 6/18/1991, and; 1 sargo fillet composite sample collected on 5/30/1991 (TSMP, 2007).
Data Reference:	Data for organic and inorganic chemicals in fish and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7, collected and reported on the Toxic Substances Monitoring Program (TSMP) database. 1978-2000. State Water Resources Control Board (SWRCB). Sacramento, CA.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	Office of Environmental Health Hazard Assessment (OEHHA) Fish Contaminant Goal of 21 ug/kg to protect human health when consuming fish (OEHHA, 2008).
Guideline Reference:	Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene
Spatial Representation:	Samples were collected from the following Salton Sea locations: from the North end, the South end and the West Side.
Temporal Representation:	Fish tissue samples were generally collected from 5/1980 through 11/2000. Fish tissue samples were not collected from each location every sampling round. Thirty-one fish fillet samples of tilapia, bairdiella, orangemouth corvina, redbelly tilapia, Mozambique tilapia, and sargo were collected. Nine tilapia fillet composites samples were collected in the years 1984-85, (2)1996, 1997, (2)1998, and (2)2000. Five bairdiella fillet composite samples were collected in 1980, 1985, (2)1989, and 2000. Ten orangemouth corvina fillet composite samples were collected in the years (2)1981, 1984-87, (2)1991, 1997, and 1999. Two orangemouth corvina single fish fillet samples were collected in the year (2)1991. Two redbelly tilapia fillet composite samples were collected in the year (2)1995. One Mozambique tilapia fillet composite sample was collected in the year 1980. Two sargo fillet composite samples were collected in the years 1985, and 1991. The exceedances were found in samples collected from 5/21/1980 through 11/09/2000.
Environmental Conditions:
QAPP Information:	The field procedures are described in TSMP Data Reports and associated Appendices. CDFG's Laboratory applies a Quality Assurance Program Plan procedures for laboratory Quality Assurance and Quality Control, as described in Rasmussen (1993).
QAPP Information Reference(s):	Toxic Substances Monitoring Program 1991 Data Report. 93-1WQ. State Water Resources Control Board (SWRCB), Division of Water Quality. Sacramento, CA.
LOE ID:	5083
Pollutant:	.alpha.-Endosulfan (Endosulfan 1) | .beta.-Endosulfan (Endosulfan 2) | Aldrin | Chlordane | DDT | Dieldrin | Endrin | Heptachlor | Heptachlor epoxide
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	36
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Thirty-six water quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at eight locations in the Salton Sea. Of these total samples, none exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Criterion Maximum Concentrations (CMCs) for the protection of freshwater aquatic life uses were used for the following constituents: 3 ug/l Aldrin, 0.22 ug/l alpha Endosulfan, 0.22 ug/l beta-Endosulfan, 2.4 ug/l Chlordane, 1.1 ug/l DDT, 0.24 ug/l Dieldrin, 0.086 ug/l Endrin, 0.52 ug/l Heptachlor, and 0.52 ug/l Heptachlor epoxide (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, and Salton Sea GS10.
Temporal Representation:	Thirty-six water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sa NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).

DECISION ID	8434
Pollutant:	Diazinon
Final Listing Decision:	List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Sources:	Source Unknown
Expected TMDL Completion Date:	2021
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is considered for placement on the section 303(d) list under sections 3.1 and 3.5 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Three lines of evidence are available in the administrative record to assess this pollutant. There were 6 water samples that exceeded the water quality objective. When compared to the California Department of Fish and Game 0.16 ug/l threshold for aquatic life, there were 6 exceedances out of 58 total water samples taken over all the sampling years. No fish tissue samples exceeded the water quality objective. When compared to the OEHHA 300 ug/kg threshold for consumption, there were no exceedances out of 31 fish tissue samples taken over all the sampling years. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification for placing this water segment-pollutant combination on the section 303(d) list. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. At a minimum, 6 out of 58 water samples exceeded the California Department of Fish and Game evaluation guideline used to interpret the water quality objective and this exceeds the allowable frequency calculated from the equation in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should be placed on the section 303(d) list because applicable water quality standards are exceeded and a pollutant contributes to or causes the problem.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8434

LOE ID:	5497
Pollutant:	Diazinon
LOE Subgroup:	Pollutant-Tissue
Matrix:	Tissue
Fraction:	Total
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	31
Number of Exceedances:	0
Data and Information Type:	Fish tissue analysis
Data Used to Asses Water Quality:	Thirty-one fish fillet samples were taken at 3 locations in the sea. The fish samples were generally collected from 5/1980 through 11/2000. Of these total samples, none exceeded the OEHHA Screening Value. (TSMP, 2007).
Data Reference:	Data for organic and inorganic chemicals in fish and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7, collected and reported on the Toxic Substances Monitoring Program (TSMP) database. 1978-2000. State Water Resources Control Board (SWRCB). Sacramento, CA.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	Office of Environmental Health Hazard Assessment (OEHHA) Screening Value of 300 ug/kg to protect human health when consuming fish (OEHHA, 1999).
Guideline Reference:	Prevalence of Selected Target Chemical Contaminants in Sport Fish From Two California Lakes: Public health designed screening study. Sacramento, CA: Office of Environmental Health Hazard Assessment
Spatial Representation:	Samples were collected from the following Salton Sea locations: from the North end, the South end, and the West Side.
Temporal Representation:	Fish tissue samples were generally collected from 5/1980 through 11/2000. Fish tissue samples were not collected from each location every sampling round. Thirty-one fish fillet samples of tilapia, bairdiella, orangemouth corvina, redbelly tilapia, Mozambique tilapia, and sargo were collected. Nine tilapia fillet composites samples were collected in the years 1984-85, (2)1996, 1997, (2)1998, and (2)2000. Five bairdiella fillet composite samples were collected in 1980, 1985, (2)1989, and 2000. Ten orangemouth corvina fillet composite samples were collected in the years (2)1981, 1984-87, (2)1991, 1997, and 1999. Two orangemouth corvina single fish fillet samples were collected in the year (2)1991. Two redbelly tilapia fillet composite samples were collected in the year (2)1995. One Mozambique tilapia fillet composite sample was collected in the year 1980. Two sargo fillet composite samples were collected in the years 1985, and 1991.
Environmental Conditions:
QAPP Information:	The field procedures are described in TSMP Data Reports and associated Appendices. CDFG's Laboratory applies a Quality Assurance Program Plan procedures for laboratory Quality Assurance and Quality Control, as described in Rasmussen (1993).
QAPP Information Reference(s):	Toxic Substances Monitoring Program 1991 Data Report. 93-1WQ. State Water Resources Control Board (SWRCB), Division of Water Quality. Sacramento, CA.
LOE ID:	4954
Pollutant:	Diazinon
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	36
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Thirty-six water quality samples were generally collected and analyzed biannually from 5/2002 through 5/2005 at 8 locations in the Salton Sea. Of these total samples, none exceeded the CDFG Hazardous Assessment Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses. There shall be no increase in hazardous chemical concentrations found in bottom sediments or aquatic life (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	California Department of Fish and Game (CDFG) Hazardous Assessment Criteria of 0.16 ug/l for the protection of aquatic life uses (Siepmann and Finlayson, 2000).
Guideline Reference:	Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, Salton Sea GS10.
Temporal Representation:	Thirty-six water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sea NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).
LOE ID:	4807
Pollutant:	Diazinon
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Warm Freshwater Habitat
Number of Samples:	22
Number of Exceedances:	6
Data and Information Type:	Other Agencies/Organizations provided monitoring data
Data Used to Asses Water Quality:	Twenty-two water samples were collected every few weeks from 8/28/1996 through 4/15/1997 at three locations in the Salton Sea. Of these total samples, 6 exceeded the CDFG Criteria. The exceedences were found in samples collected on 10/01/1996 and 10/31/1996. (CDPR, 2007).
Data Reference:	Data for pesticides in water samples collected from waterbodies located in the Colorado River Basin-Region 7. Mar. 1993-Jun. 2005.
Water Quality Objective/Criterion:	Basin Plan: No individual chemical or combination of chemicals shall be present in concentrations that adversely affect beneficial uses.
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:	California Department of Fish and Game (CDFG) Hazardous Assessment Criteria of 0.16 ug/l (1 hr. ave.) for freshwater aquatic life use protection (Siepmann and Finlayson, 2000).
Guideline Reference:	Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game
Spatial Representation:	Samples were collected from three sites in Salton Sea near the mouth of the Alamo River. The sites were approximately 0.14, 0.14, and 0.25 mi. offshore.
Temporal Representation:	The samples were collected every few weeks from 8/28/1996 through 4/15/1997. The exceedences were found in samples collected from 10/01/1996 through 10/31/1996.
Environmental Conditions:	The samples were collected every few weeks from August through November 1996 and from February through April 1997 to coincide with the pesticide application periods in the Imperial Valley (autumn and late winter/early spring) (Crepeau et al, 2002).
QAPP Information:	Investigators used USGS QA/QC in sample collection and analysis. Lab analysis was done by the USGS California District Organic Chemistry Laboratory in Sacramento, California (Crepeau, 2002).
QAPP Information Reference(s):	?Dissolved Pesticides in the Alamo River and the Salton Sea, California, 1996-97.? United States Geological Survey. Sacramento, CA. Open file report No. 02-232. http://water.usgs.gov/pubs/of/ofr02232/

DECISION ID	8436
Pollutant:	Enterococcus
Final Listing Decision:	List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Sources:	Source Unknown
Expected TMDL Completion Date:	2021
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is considered for placement on the section 303(d) list under section 3.2 of the Listing Policy. Under section 3.2 a single line of evidence is necessary to assess listing status. Two lines of evidence are available in the administrative record to assess this pollutant. There were 6 water samples that exceeded the Enterococcus water quality objectives. When compared to the Basin Plan 100 MPN/100ml Enterococcus threshold for RECI beneficial use, there were 5 exceedances out of 24 total water samples taken over all the sampling years. When compared to the Basin Plan 500 MPN/100ml Enterococcus threshold for RECII beneficial use, there was 1 exceedance out of 24 total water samples taken. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification for placing this water segment-pollutant combination on the section 303(d) list. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. At a minimum, 5 out of 24 water samples exceeded the Basin Plan water quality objective and this exceeds the allowable frequency calculated from the equation in Table 3.2 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should be placed on the section 303(d) list because applicable water quality standards are exceeded and a pollutant contributes to or causes the problem.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8436

LOE ID:	4854
Pollutant:	Enterococcus
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Water Contact Recreation
Number of Samples:	24
Number of Exceedances:	5
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Twenty-four water quality samples were generally collected and analyzed biannually from 5/2002 through 4/2003 at 6 locations in the Salton Sea. Of these total samples , 5 exceeded the Basin Plan Objective. The exceedences were found in samples collected on 9/30/2002, 11/04/2003, and 11/05/2003 from four different locations, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS7, and Salton Sea GS10(SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	Basin Plan:In waters designated for water contact recreation (REC I) the maximum allowable Enterococcus density is 100 MPN/ 100 ml (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS7, Salton Sea GS9, Salton Sea GS10.
Temporal Representation:	Twenty-four water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 10/2003, and once in 10/2004 from the Salton Sea NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round. The exceedances were found in samples collected from 9/2002 through 11/2003.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).
LOE ID:	4912
Pollutant:	Enterococcus
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total
Beneficial Use:	Non-Contact Recreation
Number of Samples:	24
Number of Exceedances:	1
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Twenty-four water quality samples were generally collected and analyzed biannually from 5/2002 through 11/2003, at 4 locations in the Salton Sea. Of these total samples, 1 exceeded the Basin Plan Objective. The exceedence was found in a sample collected on 11/04/2003 from the middle of the Salton Sea (GS2) (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	Basin Plan:In waters designated for noncontact water recreation (REC II) the maximum allowable Enterococcus density is 500 MPN/ 100 ml (CRBRWQCB, 2006).
Objective/Criterion Reference:	Water Quality Control Plan (Basin Plan), Colorado River Basin-Region 7. Palm Desert, CA.
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS7, Salton Sea GS9, Salton Sea GS10.
Temporal Representation:	Twenty-four water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sea NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).

DECISION ID	8448
Pollutant:	Dibenz[a,h]anthracene
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Original
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. One line of evidence is available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 28 water samples exceeded the California Toxics Rule criteria and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8448

LOE ID:	5092
Pollutant:	Benzo(a)pyrene (PAHs) | Benzo[a]anthracene | Benzo[b]fluoranthene | Benzo[k]fluoranthene | Chrysene (C1-C4) | Dibenz[a,h]anthracene | Indeno[1,2,3-cd]pyrene
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	28
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Twenty-eight water quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at eight locations in the Salton Sea. Of these total samples, none exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Criteria for the protection of human health when consuming organisms from aquatic systems were used for the following constituents: 0.049 ug/l Benzo[a]Anthracene, 0.049 ug/l Benzo[a]Pyrene, 0.049 ug/l Benzo[b]Fluoranthene, 0.049 ug/l Benzo[k]Fluoranthene, 0.049 ug/l Chrysene, 0.049 ug/l Dibenzo(a,h)Anthracene, and 0.049 ug/l Indeno(1,2,3-cd) Pyrene (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, and Salton Sea GS10.
Temporal Representation:	Twenty-eight water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sea NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).

DECISION ID	8457
Pollutant:	Indeno[1,2,3-cd]pyrene
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Original
Impairment from Pollutant or Pollution:	Pollutant
Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. One line of evidence is available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 28 water samples exceeded the Caifornia Toxics Rule criteria and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation:
USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 8457

LOE ID:	5092
Pollutant:	Benzo(a)pyrene (PAHs) | Benzo[a]anthracene | Benzo[b]fluoranthene | Benzo[k]fluoranthene | Chrysene (C1-C4) | Dibenz[a,h]anthracene | Indeno[1,2,3-cd]pyrene
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Dissolved
Beneficial Use:	Commercial or recreational collection of fish, shellfish, or organisms
Number of Samples:	28
Number of Exceedances:	0
Data and Information Type:	Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Asses Water Quality:	Twenty-eight water quality samples were collected and analyzed biannually from 5/2002 through 5/2005 at eight locations in the Salton Sea. Of these total samples, none exceeded the CTR Criteria (SWAMP, 2007).
Data Reference:	Data for organic and inorganic constituents in water and sediment samples collected from waterbodies located in the Colorado River Basin-Region 7. May 2002-May 2005.
Water Quality Objective/Criterion:	California Toxics Rule (CTR) Criteria for the protection of human health when consuming organisms from aquatic systems were used for the following constituents: 0.049 ug/l Benzo[a]Anthracene, 0.049 ug/l Benzo[a]Pyrene, 0.049 ug/l Benzo[b]Fluoranthene, 0.049 ug/l Benzo[k]Fluoranthene, 0.049 ug/l Chrysene, 0.049 ug/l Dibenzo(a,h)Anthracene, and 0.049 ug/l Indeno(1,2,3-cd) Pyrene (USEPA, 2000).
Objective/Criterion Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from the following Salton Sea location: Salton Sea Drain NW1, Salton Sea Drain NW2, Salton Sea GS2, Salton Sea GS3, Salton Sea GS5, Salton Sea GS7, Salton Sea GS9, and Salton Sea GS10.
Temporal Representation:	Twenty-eight water samples were collected. Water samples were generally collected and analyzed biannually, in May and October, from 5/2002 through 5/2005 from the Salton Sea NW2, GS2, GS7, and GS9 locations. The rest of the locations were sampled in May and October 2002. Samples were not collected from each location every sampling round.
Environmental Conditions:
QAPP Information:	The sampling and analysis portions of this study were conducted in accordance with the SWAMP Quality Assurance Management Plan (QAMP) (Puckett, 2002).
QAPP Information Reference(s):	Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version).