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

Supporting Information

Regional Board 8 - Santa Ana Region

Water Body Name: Chino Creek Reach 1B (Mill Creek confl to start of concrete lined channel)
Water Body ID: CAR8012100020080715104015
Water Body Type: River & Stream
 
DECISION ID
12647
 
Pollutant: Alachlor | Atrazine | Azinphos-methyl (Guthion) | Carbaryl | Carbofuran | 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 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.

One (1) 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 two (2) samples exceeded the USEPA National Recommended Ambient Water Quality Criteria Aquatic Life Protection Instantaneous Maximum 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 based on only two samples it cannot be determined if applicable water quality standards are not being exceeded.
 
SWRCB Board Decision / Staff Recommendation:
 
USEPA Decision:
 
 
Lines of Evidence (LOEs) for Decision ID 12647
 
LOE ID: 7796
 
Pollutant: Alachlor | Atrazine | Azinphos-methyl (Guthion) | Carbaryl | Carbofuran | DDE
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
Aquatic Life Use: Warm Freshwater Habitat
 
Number of Samples: 2
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Of the 2 samples collected, none exceeded the guidelines.
Data Reference: Concentrations of Pesticides in the waterbodies in the Santa Ana Region
 
Water Quality Objective/Criterion: Santa Ana Region’s Basin Plan Narrative Objective: The concentrations of toxic pollutants in the water column, sediments or biota shall not adversely affect beneficial uses.
Objective/Criterion Reference: Water Quality Control Plan-Santa Ana Region
 
Evaluation Guideline: USEPA National Recommended Ambient Water Quality Criteria Aquatic Life Protection Instantaneous Max: alachlor: 76 ug/l; atrazine: 1 ug/l ; azinphos methyl: 0.01 ug/l ; carbaryl: 0.02 ug/l ; carbofuran: 0.5 ug/l.
Guideline Reference: National recommended water quality criteria: 2002. EPA-822-R-02-047 Washington, D.C. USEPA
  Compilation of Water Quality Goals
 
Spatial Representation: The samples were collected from two locations: Chino C Above Central Ave Near Los Serranos California_USGS NAWQA site and Little Chino C Above Pipeline Ave Near Los Serranos California_USGS NAWQA site
Temporal Representation: The samples were collected on 8/7/00 and 8/11/00.
Environmental Conditions:
QAPP Information: The data's quality is deemed appropriate because the data came from the Department of Pesticide Regulations.
QAPP Information Reference(s):
 
DECISION ID
12685
 
Pollutant: Aluminum | Cadmium | Chromium, hexavalent | Copper | Lead | Mercury | Nickel | Selenium | Silver | 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 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 two samples exceeded the USEPA National Recommended Ambient Water Quality Criteria for Aquatic life protection and the California Toxics Rule 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 it cannot be determined if applicable water quality standards are not being exceeded.
 
SWRCB Board Decision / Staff Recommendation:
 
USEPA Decision:
 
 
Lines of Evidence (LOEs) for Decision ID 12685
 
LOE ID: 8376
 
Pollutant: Cadmium | Copper | Lead | Nickel | Silver | Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
Aquatic Life Use: Warm Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: None of the samples exceeded the standards
Data Reference: 2006 HCMP Database
 
Water Quality Objective/Criterion: Basin Plan objective: The concentrations of toxic pollutants in the water column, sediments, or biota shall not adversely affect beneficial uses.
Objective/Criterion Reference: Water Quality Control Plan-Santa Ana Region
 
Evaluation Guideline: The California Toxics Rule cadmium criteria is hardness dependent and ranged as follows: cadium - 5.09 ppb; copper - 20.55 ppb; lead - 10.32 ppb; nickel - 114.01 ppb; silver - 19.90 ppb; zinc - 262.19 ppb
Guideline 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
 
Spatial Representation: The sample was taken in Chino Creek at Pine Avenue
Temporal Representation: The sample was taken on 8/16/2005
Environmental Conditions:
QAPP Information: The data's quality is deemed acceptable because it was submitted by an NPDES discharger in accordance with its Monitoring and Reporting Requirements.
QAPP Information Reference(s):
 
LOE ID: 8297
 
Pollutant: Aluminum | Chromium, hexavalent | Mercury | Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
Aquatic Life Use: Warm Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: The only sample collected did not exceed the guidelines.
Data Reference: 2006 HCMP Database
 
Water Quality Objective/Criterion: Santa Ana Region’s Basin Plan Narrative Objective: The concentrations of toxic pollutants in the water column, sediments or biota shall not adversely affect beneficial uses.
Objective/Criterion Reference: Water Quality Control Plan-Santa Ana Region
 
Evaluation Guideline: USEPA National Recommended Ambient Water Quality Criteria for Aquatic life protection: Aluminum - 87 ppb, Mercury - 0.77 ppb

CTR Fresh Water Aquatic Life Protection 4 day Average continuous concentration: Chromium VI - 11 ppb, Selenium - 20 ppb
Guideline 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
  Compilation of Water Quality Goals
 
Spatial Representation: The sample was collected in Chino Creek at Pine Avenue.
Temporal Representation: The sample was collected on August 16, 2005.
Environmental Conditions:
QAPP Information: The data's quality is deemed acceptable because it was submitted by an NPDES discharger in accordance with its Monitoring and Reporting Requirements.
QAPP Information Reference(s):
 
DECISION ID
12713
 
Pollutant: 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 3.2 of the Listing Policy. Under section 3.2 a single line of evidence is necessary to assess listing status.

One (1) line of evidence is available in the administrative record to assess this pollutant. Two hundred fifty-three (253) 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 in favor of 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. Two hundred fifty-three (253) of two hundred eighty-nine (289) samples exceed the Basin Plan Objective and this exceeds 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 the GWR beneficial use assessment is more correctlyl assessed using actual groundwater data. The surface water objectives for this constituent (chloride) was tied to groundwater objectives for these constituentsthat were deleted from the Basin Plan (Resolution No. R8-2004-0001). Stakeholders have indicated their intent to re-visit the appropriateness of the surface water objectives for these individual mineral objectives as part of the on-going TDS/Nitrogen Task Force.
 
SWRCB Board Decision / Staff Recommendation:
 
USEPA Decision:
 
 
Lines of Evidence (LOEs) for Decision ID 12713
 
LOE ID: 7889
 
Pollutant: Chloride
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Groundwater Recharge
 
Number of Samples: 289
Number of Exceedances: 253
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Of the 289 samples taken 253 exceeded the Basin Plan's objective.
Data Reference: 2006 HCMP Database
 
Water Quality Objective/Criterion: Santa Ana Region Basin Plan: 75 mg/l
Objective/Criterion Reference: Water Quality Control Plan-Santa Ana Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at one station at Pine Avenue
Temporal Representation: The samples were collected on monthly since 1984 through 2007.
Environmental Conditions:
QAPP Information: The data's quality is deemed acceptable because it was submitted by an NPDES discharger in accordance with its Monitoring and Reporting Requirements.
QAPP Information Reference(s):
 
DECISION ID
12702
 
Pollutant: Chlorpyrifos | Dieldrin | Disulfoton | Malathion | Molinate | Parathion | Simazine | Thiobencarb/Bolero
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 two samples exceeded the California Department of Fish and Game Criteria, the California Toxics Rule Freshwater aquatic life protection Continuous Concentration 4 day average, or the US EPA National Recommended Water Quality Criteria Aquatic Life Protection Instantaneous Maximum 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 12702
 
LOE ID: 7797
 
Pollutant: Chlorpyrifos
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
Aquatic Life Use: Warm Freshwater Habitat
 
Number of Samples: 2
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Of the two samples collected, none exceeded the guideline.
Data Reference: Concentrations of Pesticides in the waterbodies in the Santa Ana Region
 
Water Quality Objective/Criterion: Santa Ana Region’s Basin Plan Narrative Objective: The concentrations of toxic pollutants in the water column, sediments or biota shall not adversely affect beneficial uses.
Objective/Criterion Reference: Water Quality Control Plan-Santa Ana Region
 
Evaluation Guideline: California Department of Fish and Game: 0.014 ppb.
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: The samples were collected from two locations: Chino C Above Central Ave Near Los Serranos California_USGS NAWQA site and Little Chino C Above Pipeline Ave Near Los Serranos California_USGS NAWQA siteThe samples were collected at one station.
Temporal Representation: The samples were collected on 8/7/00 and 8/11/00.
Environmental Conditions:
QAPP Information: The data's quality is deemed appropriate because it came from the Department of Pesticide Regulation.
QAPP Information Reference(s):
 
LOE ID: 7803
 
Pollutant: Dieldrin
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
Aquatic Life Use: Warm Freshwater Habitat
 
Number of Samples: 2
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Of the two samples none exceeded the criteria.
Data Reference: Concentrations of Pesticides in the waterbodies in the Santa Ana Region
 
Water Quality Objective/Criterion: Santa Ana Region’s Basin Plan Narrative Objective: The concentrations of toxic pollutants in the water column, sediments or biota shall not adversely affect beneficial uses.
Objective/Criterion Reference: Water Quality Control Plan-Santa Ana Region
 
Evaluation Guideline: CTR Freshwater aquatic life protection Cont Conc 4 day ave: Dieldrin - 0.056 ppb
Guideline 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
 
Spatial Representation: The samples were collected from two locations: Chino C Above Central Ave Near Los Serranos California_USGS NAWQA site and Little Chino C Above Pipeline Ave Near Los Serranos California_USGS NAWQA site
Temporal Representation: The samples were collected on 8/7/00 and 8/11/00.
Environmental Conditions:
QAPP Information: The data's quality is deemed appropriate because it was submitted by the Department of Pesticide Regulation.
QAPP Information Reference(s):
 
LOE ID: 7802
 
Pollutant: Disulfoton | Malathion | Molinate | Parathion | Simazine | Thiobencarb/Bolero
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
Aquatic Life Use: Warm Freshwater Habitat
 
Number of Samples: 2
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Of the two samples collected, none exceeded the guidelines.
Data Reference: Concentrations of Pesticides in the waterbodies in the Santa Ana Region
 
Water Quality Objective/Criterion: Santa Ana Region’s Basin Plan Narrative Objective: The concentrations of toxic pollutants in the water column, sediments or biota shall not adversely affect beneficial uses.
Objective/Criterion Reference: Water Quality Control Plan-Santa Ana Region
 
Evaluation Guideline: US EPA National Recommended Water Quality Criteria Aquatic Life Protection Instantaneous Max:disulfoton: 0.05 ppb, malathion: 0.01 ppb, simazine: 10 ppb, propachlor: 8 ppb.
California Department of Fish and Game: thiobencarb: 3.1 ppb, molinate: 13 ppb, parathion: 0.08 ppb.
Guideline Reference: National recommended water quality criteria: 2002. EPA-822-R-02-047 Washington, D.C. USEPA
  Compilation of Water Quality Goals
 
Spatial Representation: The samples were collected from two locations: Chino C Above Central Ave Near Los Serranos California_USGS NAWQA site and Little Chino C Above Pipeline Ave Near Los Serranos California_USGS NAWQA site.
Temporal Representation: The samples were collected on 8/7/00 and 8/11/00.
Environmental Conditions:
QAPP Information: The data's quality is deemed appropriate because it was submitted by the Department of Pesticide Regulation.
QAPP Information Reference(s):
 
DECISION ID
12715
 
Pollutant: Diazinon
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 lines of evidence is available in the administrative record to assess this pollutant. One (1) 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 (1) of two (2) samples exceeded the California Department of Fish and Game 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 though this water body is impaired for sediment toxicity, these water body-pollutant combinations should not be placed on the section 303(d) list because applicable water quality standards for these pollutants are not being exceeded
 
SWRCB Board Decision / Staff Recommendation:
 
USEPA Decision:
 
 
Lines of Evidence (LOEs) for Decision ID 12715
 
LOE ID: 7798
 
Pollutant: Diazinon
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
Aquatic Life Use: Warm Freshwater Habitat
 
Number of Samples: 2
Number of Exceedances: 1
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Of the two samples collected, one exceeded the guideline.
Data Reference: Concentrations of Pesticides in the waterbodies in the Santa Ana Region
 
Water Quality Objective/Criterion: Santa Ana Region’s Basin Plan Narrative Objective: The concentrations of toxic pollutants in the water column, sediments or biota shall not adversely affect beneficial uses.
Objective/Criterion Reference: Water Quality Control Plan-Santa Ana Region
 
Evaluation Guideline: California Department of Fish and Game 0.08 ppb
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: The samples were collected from two locations: Chino C Above Central Ave Near Los Serranos California_USGS NAWQA site and Little Chino C Above Pipeline Ave Near Los Serranos California_USGS NAWQA site.
Temporal Representation: The samples were collected on 8/7/00 and 8/11/00
Environmental Conditions:
QAPP Information: The data's quality is deemed appropriate because it came from the Department of Pesticide Regulation.
QAPP Information Reference(s):
 
DECISION ID
12717
 
Pollutant: Salinity/TDS/Chlorides
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.

One line of evidence is available in the administrative record to assess this pollutant. Eghteen 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. Eighteen (18) of two hundred eighty-eight (288) samples exceeded the Basin Plan Objective and this does not exceed the allowable frequency listed in Table 3.2 of the Listing Policy. The surface water objectives for this constituent was tied to groundwater objectives for this an dmany other constiutents theat were deleted from the Basin Plan (Resolution No. R8-2004-0001). Stakeholders have indicated their intent to re-visit the appropriateness of the surface water objectives for this and many other individual mineral objectives as part of the on-going TDS/Nitrogen Task Force.
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 12717
 
LOE ID: 7896
 
Pollutant: Total Dissolved Solids
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Groundwater Recharge
 
Number of Samples: 288
Number of Exceedances: 18
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Of the 288 samples collected 18 exceeded the Basin Plan's objective.
Data Reference: 2006 HCMP Database
 
Water Quality Objective/Criterion: Santa Ana Region's Basin Plan Objective: TDS - 550 mg/l
Objective/Criterion Reference: Water Quality Control Plan-Santa Ana Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at one station at Pine Ave.
Temporal Representation: The samples were collected several times per month over a period of several years starting with 10/8/1984 through 2/22/2007
Environmental Conditions:
QAPP Information: The data's quality is deemed appropriate because it originated from an NPDES discharger in compliance with their monitoring and reporting program.
QAPP Information Reference(s):
 
DECISION ID
16492
 
Pollutant: Sodium
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.

One (1) line of evidence is available in the administrative record to assess this pollutant. Two hundred -seven (207) 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. Two hundred-seven (207) of two hundred sixty-one (261) samples exceeded the Basin Plan Objective and this does exceed the allowable frequency listed in Table 3.2 of the Listing Policy. However, the GWR beneficial use is more correctly assessed using actual groundwater data. The surface water objective for this mineral constituent was tied to groundwater objectives for this constituent that were deleted from the Basin Plan (Resolution No. R8-2004-0001). Stakeholders have indicated their intent to re-visti the appropriateness of the surface water objectives for this and other individual mineral objectives as part of the ongoing TDS/Nitrogen Task Force.
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 16492
 
LOE ID: 7892
 
Pollutant: Sodium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
Aquatic Life Use: Warm Freshwater Habitat
 
Number of Samples: 261
Number of Exceedances: 207
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Of the 261 samples collected, 207 exceeded the Basin Plan's Objective.
Data Reference: 2006 HCMP Database
 
Water Quality Objective/Criterion: Santa Ana Region's Basin Plan: 75 mg/l
Objective/Criterion Reference: Water Quality Control Plan-Santa Ana Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at one station at Pine Avenue.
Temporal Representation: The samples were collected monthly since November 1990 through February 2007
Environmental Conditions:
QAPP Information: The data's quality is deemed appropriate because it originated from an NPDES discharger in compliance with their monitoring and reporting program.
QAPP Information Reference(s):
 
DECISION ID
16493
 
Pollutant: Total Nitrogen as N
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.

One line of evidence is available in the administrative record to assess this pollutant. Seven (7) 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. Seven (7) of forty-two (42) samples exceeded the Basin Plan Objective and this does not exceed the allowable frequency listed in Table 3.2 of the Listing Policy. In addition, the GWR beneficial use assessment is more correctly assessed using actual groundwater data. The surface water objectives for this constituent was tied to groundwater objectives for this an dmany other constiutents theat were deleted from the Basin Plan (Resolution No. R8-2004-0001). Stakeholders have indicated their intent to re-visit the appropriateness of the surface water objectives for this and many other individual mineral objectives as part of the on-going TDS/Nitrogen Task Force.
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 16493
 
LOE ID: 7897
 
Pollutant: Total Nitrogen as N
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Groundwater Recharge
 
Number of Samples: 42
Number of Exceedances: 7
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Of the 42 samples collected 7 exceeded the objective.
Data Reference: 2006 HCMP Database
 
Water Quality Objective/Criterion: Santa Ana Region's Basin Plan Objective: Total Inorganic Nitrogen: 8 mg/l
Objective/Criterion Reference: Water Quality Control Plan-Santa Ana Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at one station at Pine Ave.
Temporal Representation: The samples were collected several times per month since 4/6/2006 through 2/22/2007
Environmental Conditions:
QAPP Information: The data's quality is deemed appropriate because it originated from an NPDES discharger in compliance with their monitoring and reporting program.
QAPP Information Reference(s):
 
DECISION ID
12707
 
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.

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 forty-two (42) samples exceeded the Basin Plan 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 12707
 
LOE ID: 7893
 
Pollutant: pH
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
Aquatic Life Use: Warm Freshwater Habitat
 
Number of Samples: 42
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Of the 42 field measurements taken none exceeded the Basin Plan's Objective
Data Reference: 2006 HCMP Database
 
Water Quality Objective/Criterion: Santa Ana Region's Basin Plan Objective: 6.5 - 8.5 pH units
Objective/Criterion Reference: Water Quality Control Plan-Santa Ana Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The field measurements were collected at one station at Pine Ave.
Temporal Representation: The measurements were taken monthly from 1/18/05 through 2/22/07
Environmental Conditions:
QAPP Information: The data's quality is deemed appropriate because it originated from an NPDES discharger in compliance with their monitoring and reporting program.
QAPP Information Reference(s):
 
DECISION ID
12710
 
Pollutant: Chemical oxygen demand (COD)
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: (LIST - CONVENTIONAL POLLUTANT)
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.

[NUMBER] lines of evidence are available in the administrative record to assess this pollutant. Eighty-one (81) 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 in favor of 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. eighty-one (81) of ninety-nine (99) samples exceed the Basin Plan Objective and this exceeds 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 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 12710
 
LOE ID: 7891
 
Pollutant: Chemical oxygen demand (COD)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
Aquatic Life Use: Warm Freshwater Habitat
 
Number of Samples: 99
Number of Exceedances: 81
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Of the 99 samples collected 81 exceeded the Basin Plan's Objective
Data Reference: 2006 HCMP Database
 
Water Quality Objective/Criterion: Santa Ana Region's Basin Plan Objective: 15 mg/l
Objective/Criterion Reference: Water Quality Control Plan-Santa Ana Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were collected at one station at Pine Ave.
Temporal Representation: The samples were collected monthly since 1990 through 2005.
Environmental Conditions:
QAPP Information: The data's quality is deemed appropriate because it originated from an NPDES discharger in compliance with their monitoring and reporting program.
QAPP Information Reference(s):