Water Body Name: | Trinity River HU, Middle HA |
Water Body ID: | CAR1063102119990604163706 |
Water Body Type: | River & Stream |
DECISION ID |
44500 |
Region 1 |
Trinity River HU, Middle HA |
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Pollutant: | Aldrin | Atrazine | Azinphos, Ethyl (Ethyl Guthion) | Bolstar | Carbofuran | Chlordane | Chlorothalonil | Chlorpyrifos | Chlorpyrifos, methyl | Ciodrin | Dacthal | Demeton s | Dichlofenthion | Dichlorvos | Dieldrin | Dimethoate | Dioxathion | Dyfonate (Fonofos or Fonophos) | Endrin | Endrin Ketone | Ethion | Ethoprop | Famphur | Fenchlorphos | Fenitrothion | Fensulfothion | Fenthion | Glyphosate | Heptachlor | Heptachlor epoxide | Hexachlorobenzene/ HCB | Hexachlorocyclohexane (HCH), alpha | Hexachlorocyclohexane (HCH), beta | Leptophos | Lindane/gamma Hexachlorocyclohexane (gamma-HCH) | Merphos | Methidathion | Methoxychlor | Methyl Parathion | Mevinphos | Molinate | Naled | Oxadiazon | Oxychlordane | Phorate | Phosmet | Phosphamidon | Prometon (Prometone) | Prometryn | Propazine | Secbumeton | Simazine | Simetryn | Sulfotep | Tedion | Terbufos | Terbuthylazine | Terbutryn | Tetrachlorvinphos | Thiobencarb/Bolero | Thionazin | Tokuthion | Toxaphene | Trichlorfon | Trichloronate | beta-BHC (Benzenehexachloride or beta-HCH) | cis-Nonachlor | delta-BHC (Benzenehexachloride or delta-HCH) | o,p'-DDD (Dichlorodiphenyldichloroethane)) | o,p'-DDE (Dichlorodiphenyldichloroethylene) | p,p'-DDD (Dichlorodiphenyldichloroethane) | p,p'-DDE | p,p'-DDMU | trans-Nonachlor |
Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | Do Not List on 303(d) list (TMDL required list)(2012) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | Regional Water Board conclusion: This pollutant was considered for placement on the section 303(d) List in a previous Integrated Report cycle. No new information was reviewed for this current Integrated Report cycle. Therefore, the previous conclusion remains unchanged, and is as follows:
These pollutants are 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 in LOE #30171 exceed the water quality objective.The pollutants in LOE #30064do not have water quality objectives and, therefore, a decision could not be made. The samples were analyzed for 95 pesticides, pesticide constituents, isomers, or metabolites. For each of the 95 pesticide analytes, 3 to 4 samples were collected. The samples were collected as part of the Surface Water Ambient Water Monitoring Program (SWAMP). The data are found in the 5-Year Monitoring Report (NCRWQCB 2008). 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 738 samples for both LOEs, #30064, without criteria, or LOE #30171 with criteria, exceeded the water quality 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. |
Regional Board Decision Recommendation: | This region was not assessed this cycle. All decisions have been carried over from the previous cycle and remain the same. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
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LOE ID: | 30171 | ||||
Pollutant: | Aldrin | Atrazine | Carbofuran | Chlordane | Chlorpyrifos | Dacthal | Dieldrin | Endrin | Glyphosate | Heptachlor | Heptachlor epoxide | Hexachlorobenzene/ HCB | Hexachlorocyclohexane (HCH), alpha | Hexachlorocyclohexane (HCH), beta | Lindane/gamma Hexachlorocyclohexane (gamma-HCH) | Methoxychlor | Molinate | Simazine | Thiobencarb/Bolero | Toxaphene | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 738 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | None of the 738 pesticide samples collected in the mainstem Trinity River exceed the objective as all of the samples were either measured as non-detect or were measured as detected but not quantified with reporting limits below objectives or evaluation guidelines. The samples were analyzed for 95 pesticides, pesticide constituents, isomers, or metabolites. For each of the 95 pesticide analytes, 3 to 4 samples were collected. The samples were collected as part of the Surface Water Ambient Water Monitoring Program (SWAMP). The data are found in the 5-Year Monitoring Report (NCRWQCB 2008). | ||||
Data Reference: | Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008 | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | Per the Basin Plan (NCRWQCB 2007): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan.
No evaluation guidelines for the dissolved fractions of the pesticides assessed for this waterbody for the Municipal & Domestic Supply beneficial use could be found that meet the requirements of Section 6.1.3 of the Listing Policy. |
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Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - North Coast Region (Region 1) | ||||
Evaluation Guideline: | Hexachlorocyclohexane, alpha (0.0026 ug/l)
Hexachlorocyclohexane, beta (0.0091ug/l) Aldrin (0.000049 ug/l) Atrazine (0.001 ug/l) Carbofuran (0.04 mg/l) Chlordane (0.0001 ug/l) Chlorpyrifos (0.083 ug/l) Dacthal (70 ug/l) Dieldrin (0.00014 ug/l) Endrin (0.002 ug/l) Glyphosate (700 ug/l) Heptachlor (0.01 ug/l) Heptachlor epoxide (0.01 ug/l) Hexachlorobenzene/ HCB (0.001 ug/l) Lindane/gamma Hexachlorocyclohexane (gamma-HCH) (.98 ug/l) Methoxychlor (0.03 mg/l) Molinate (0.02 mg/l) Simazine (0.04 mg/l) Thiobencarb/Bolero (0.07 mg/l) Toxaphene (0.003 mg/l) |
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Guideline Reference: | National recommended water quality criteria: 2002. EPA-822-R-02-047 Washington, D.C. USEPA | ||||
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 | |||||
California Code of Regulations, Title 22, Division 4, Chapter 15. Domestic Water Quality and Monitoring | |||||
Spatial Representation: | Samples were collected from the Trinity River Watershed from 2 locations as follows: (1) from the North Fork Trinity Samples were collected from February 2002 to June 2003. Site visits corresponded to fall, winter, spring and early summer seasonal conditions. | ||||
Temporal Representation: | Samples were collected as grab samples during 23 site visits to each of the three sites from March 2001 to June 2006. Site visits corresponded to fall, winter, spring and early summer seasonal conditions. | ||||
Environmental Conditions: | There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data. | ||||
QAPP Information: | Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002). | ||||
QAPP Information Reference(s): | |||||
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LOE ID: | 30064 | ||||
Pollutant: | Azinphos, Ethyl (Ethyl Guthion) | Bolstar | Carbofuran | Chlorothalonil | Chlorpyrifos, methyl | Ciodrin | Demeton s | Dichlofenthion | Dichlorvos | Dimethoate | Dioxathion | Dyfonate (Fonofos or Fonophos) | Endrin Ketone | Ethion | Ethoprop | Famphur | Fenchlorphos | Fenitrothion | Fensulfothion | Fenthion | Leptophos | Lindane/gamma Hexachlorocyclohexane (gamma-HCH) | Merphos | Methidathion | Methyl Parathion | Mevinphos | Naled | Oxadiazon | Oxychlordane | Phorate | Phosmet | Phosphamidon | Prometon (Prometone) | Prometryn | Propazine | Secbumeton | Simetryn | Sulfotep | Tedion | Terbufos | Terbuthylazine | Terbutryn | Tetrachlorvinphos | Thiobencarb/Bolero | Thionazin | Tokuthion | Trichlorfon | Trichloronate | beta-BHC (Benzenehexachloride or beta-HCH) | cis-Nonachlor | delta-BHC (Benzenehexachloride or delta-HCH) | o,p'-DDD (Dichlorodiphenyldichloroethane)) | o,p'-DDE (Dichlorodiphenyldichloroethylene) | p,p'-DDD (Dichlorodiphenyldichloroethane) | p,p'-DDE | p,p'-DDMU | trans-Nonachlor | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Dissolved | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 738 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | None of the 738 pesticide samples collected in the mainstem Trinity River exceed the objective as all of the samples were either measured as non-detect or were measured as detected but not quantified with reporting limits below objectives or evaluation guidelines. The samples were analyzed for 95 pesticides, pesticide constituents, isomers, or metabolites. For each of the 95 pesticide analytes, 3 to 4 samples were collected. The samples were collected as part of the Surface Water Ambient Water Monitoring Program (SWAMP). The data are found in the 5-Year Monitoring Report (NCRWQCB 2008). | ||||
Data Reference: | Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008 | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | Per the Basin Plan (NCRWQCB 2007): No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. There shall be no bioaccumulation of pesticide concentrations found in bottom sediments or aquatic life. Waters designated for use as domestic or municipal supply shall not contain concentrations of pesticides in excess of the limiting concentrations set forth in California Code of Regulations, Title 22, Division 4, Chapter 15, Article 4, Section 64444, and listed in Table 3.2 of the Basin Plan.
No evaluation guidelines for the dissolved fractions of the pesticides assessed for this waterbody for the Municipal & Domestic Supply beneficial use could be found that meet the requirements of Section 6.1.3 of the Listing Policy. |
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Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - North Coast Region (Region 1) | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Samples were collected from the Trinity River Watershed from 2 locations as follows: (1) from the North Fork Trinity River at Helena (SWAMP Station ID 106TRINFH), and (2) from the mainstem Trinity River at Salyer (SWAMP Station ID 106TRINSL). Samples were collected from well-mixed flows in glides or riffles. | ||||
Temporal Representation: | Samples were collected from February 2002 to June 2003. Site visits corresponded to fall, winter, spring and early summer seasonal conditions. | ||||
Environmental Conditions: | There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data. | ||||
QAPP Information: | Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 2002). | ||||
QAPP Information Reference(s): | |||||
DECISION ID |
38913 |
Region 1 |
Trinity River HU, Middle HA |
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Pollutant: | Aluminum |
Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | Do Not List on 303(d) list (TMDL required list)(2012) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | Regional Water Board conclusion: This pollutant was considered for placement on the section 303(d) List in a previous Integrated Report cycle. No new information was reviewed for this current Integrated Report cycle. Therefore, the previous conclusion remains unchanged, and is as follows:
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 20 aluminum 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 (i.e., sufficient justification to not 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) None of the 20 samples exceeded the aluminum objective, 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. |
Regional Board Decision Recommendation: | This region was not assessed this cycle. All decisions have been carried over from the previous cycle and remain the same. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
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LOE ID: | 25365 | ||||
Pollutant: | Aluminum | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 20 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | None of the 20 aluminum samples collected from the Trinity River Watershed, Middle Trinity Hydrologic Area exceed the objective. The samples were collected as part of the Surface Water Ambient Water Monitoring Program (SWAMP). The data are found in the SWAMP Summary Report for the North Coast Region for Years 2000-2006 (NCRWQCB 2008). | ||||
Data Reference: | Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008 | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | Per the Basin Plan (NCRWQCB 2007): The Maximum Contaminant Level for aluminum is 1.0 mg/l (1,000 ug/L). | ||||
Objective/Criterion Reference: | Title 22. Division 4. Chapter 15. Sections 64400 et seq. California Code of Regulations | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Samples were collected from the Trinity River Watershed from 2 locations as follows: (1) from the North Fork Trinity River at Helena (SWAMP Station ID TRINFH), and (2) from the mainstem Trinity River at Salyer (SWAMP Station ID TRINSL). Samples were collected from well-mixed flows in glides or riffles. | ||||
Temporal Representation: | Samples were collected from February 2002 to June 2003. Site visits corresponded to fall, winter, spring and early summer seasonal conditions. | ||||
Environmental Conditions: | There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data. | ||||
QAPP Information: | Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (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 |
36191 |
Region 1 |
Trinity River HU, Middle HA |
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Pollutant: | Arsenic | Cadmium | Chromium (total) | 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: | Do Not List on 303(d) list (TMDL required list)(2012) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | Regional Water Board Conclusion:
This pollutant was considered for placement on the section 303(d) list in a previous Integrated Report cycle. No new information was reviewed for this current Integrated Report cycle. Therefore, the previous conclusion remains unchanged, and is as follows: 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 200 metals 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 (i.e., sufficient justification to not 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) None of the 200 samples exceeded the metal objectives, and this does not exceed the allowable frequency of 18 per the binomial distribution described in Section 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. |
Regional Board Decision Recommendation: | This region was not assessed this cycle. All decisions have been carried over from the previous cycle and remain the same. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
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LOE ID: | 21513 | ||||
Pollutant: | Arsenic | Cadmium | Chromium (total) | Copper | Lead | Mercury | Nickel | Selenium | Silver | Zinc | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 200 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | None of the 200 metals samples collected in the mainstem Trinity River exceed the objectives. There were 10 samples collected for each of the 10 metal parameters at each of the 2 sites. The samples were collected as part of the Surface Water Ambient Water Monitoring Program (SWAMP). The data are found in the SWAMP Summary Report for the North Coast Region for Years 2000-2006 (NCRWQCB 2008). | ||||
Data Reference: | Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008 | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | Per the Basin Plan (NCRWQCB 2007): Arsenic objective is 0.05 mg/L. Cadmium objective is 0.01 mg/L. Chromium objective is 0.05 mg/L. Lead objective is 0.05 mg/L. Mercury objective is 0.002 mg/L. Selenium objective is 0.01 mg/L. Silver objective is 0.05 mg/L. Per 22 CCR 64431: Nickel maximum contaminant level is 0.1 mg/L. Per 22 CCR 64449: Copper secondary maximum contaminant level is 1.0 mg/L. Zinc secondary maximum contaminant level is 5.0 mg/L. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - North Coast Region (Region 1) | ||||
Title 22. Division 4. Chapter 15. Sections 64400 et seq. California Code of Regulations | |||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Samples were collected from the Trinity River Watershed from 2 locations as follows: (1) from the North Fork Trinity River at Helena (SWAMP Station ID 106TRINFH), and (2) from the mainstem Trinity River at Salyer (SWAMP Station ID 106TRINSL). Samples were collected from well-mixed flows in glides or riffles. | ||||
Temporal Representation: | Samples were collected from February 2002 to June 2003. Site visits corresponded to fall, winter, spring and early summer seasonal conditions. | ||||
Environmental Conditions: | There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data. | ||||
QAPP Information: | Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 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 |
38797 |
Region 1 |
Trinity River HU, Middle HA |
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Pollutant: | Chloride |
Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | Do Not List on 303(d) list (TMDL required list)(2012) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | 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 to assess protection of the municipal and domestic supply (MUN) beneficial use. It should be noted that no new data were assessed this Integrated Report cycle, however the use rating and decision language was edit to reflect that there were an insufficient number of samples available to determine with the power and confidence of the Listing Policy if the MUN beneficial use is being protected.
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 (i.e., sufficient justification to not 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) Zero of twenty samples exceed the objective, however this sample size is insufficient to determine with the power and confidence of the Listing Policy if standards are not met, as a minimum of either (1) 26 samples, or (2) greater than or equal to 5 exceedances of the objective with less than 26 samples is needed for application of Table 3.2. (4) Pursuant to Section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
Regional Board Decision Recommendation: | This region was not assessed this cycle. All decisions have been carried over from the previous cycle and remain the same. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
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LOE ID: | 25418 | ||||
Pollutant: | Chloride | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Not Recorded | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 20 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | None of the 20 chloride samples collected in the mainstem Trinity River exceed the evaluation guideline. The samples were collected as part of the Surface Water Ambient Water Monitoring Program (SWAMP). The data are found in the SWAMP Summary Report for the North Coast Region for Years 2000-2006 (NCRWQCB 2008). | ||||
Data Reference: | Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008 | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | Per the Basin Plan (NCRWQCB 2007): Waters shall not contain taste- or odor-producing substances in concentrations that impart undesirable tastes or odors to fish flesh or other edible products of aquatic origin, or that cause nuisance or adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - North Coast Region (Region 1) | ||||
Evaluation Guideline: | Per 22 CCR 64449: The recommended Secondary Maximum Contaminant Level for chloride is 250 mg/L. | ||||
Guideline Reference: | Title 22. Division 4. Chapter 15. Sections 64400 et seq. California Code of Regulations | ||||
Spatial Representation: | Samples were collected from the Trinity River Watershed from 2 locations as follows: (1) from the North Fork Trinity River at Helena (SWAMP Station ID 106TRINFH), and (2) from the mainstem Trinity River at Salyer (SWAMP Station ID 106TRINSL). Samples were collected from well-mixed flows in glides or riffles. | ||||
Temporal Representation: | Samples were collected from February 2002 to June 2003. Site visits corresponded to fall, winter, spring and early summer seasonal conditions. | ||||
Environmental Conditions: | There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data. | ||||
QAPP Information: | Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 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 |
44171 |
Region 1 |
Trinity River HU, Middle HA |
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Pollutant: | Nitrogen, ammonia (Total Ammonia) |
Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | Do Not List on 303(d) list (TMDL required list)(2012) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | The pollutant name was changed from "Ammonia as Nitrogen" to "Nitrogen, ammonia (Total Ammonia)".
Regional Water Board conclusion: This pollutant was considered for placement on the section 303(d) List in a previous Integrated Report cycle. No new information was reviewed for this current Integrated Report cycle. Therefore, the previous conclusion remains unchanged, and is as follows: 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 20 ammonia as nitrogen samples exceed the 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 (i.e., sufficient justification to not 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) None of the 20 samples exceed the evaluation 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. |
Regional Board Decision Recommendation: | This region was not assessed this cycle. All decisions have been carried over from the previous cycle and remain the same. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
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LOE ID: | 26301 | ||||
Pollutant: | Ammonia as Nitrogen | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Aquatic Life Use: | Fish Migration | Fish Spawning | Freshwater Replenishment | Preservation of Rare & Endangered Species | Wildlife Habitat | ||||
Number of Samples: | 20 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | None of the 20 ammonia as nitrogen samples collected from the Trinity River exceed the objective. The samples were collected as part of the Surface Water Ambient Water Monitoring Program (SWAMP). The data are found in the SWAMP Summary Report for the North Coast Region for Years 2000-2006 (NCRWQCB 2008). | ||||
Data Reference: | Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008 | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | Per the Basin Plan (NCRWQCB 2007): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - North Coast Region (Region 1) | ||||
Evaluation Guideline: | Per the National Recommended Water Quality Criteria (USEPA 2006): The 1-hour average concentration (acute criterion or CMC) of total ammonia nitrogen (in mg N/L) for freshwater where salmonid fish are present, which is not to be exceeded more than once every three years on average, is calculated using the following equation: CMC=0.275/(1+10^(7.204 - pH)) + 39.0/(1+10^(pH - 7.204)). | ||||
Guideline Reference: | National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Office of Science and Technology | ||||
Spatial Representation: | Samples were collected from the Trinity River Watershed from 2 locations as follows: (1) from the North Fork Trinity River at Helena (SWAMP Station ID 106TRINFH), and (2) from the mainstem Trinity River at Salyer (SWAMP Station ID 106TRINSL). Samples were collected from well-mixed flows in glides or riffles. | ||||
Temporal Representation: | Samples were collected from February 2002 to June 2003. Site visits corresponded to fall, winter, spring and early summer seasonal conditions. | ||||
Environmental Conditions: | There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data. | ||||
QAPP Information: | Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (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 |
38979 |
Region 1 |
Trinity River HU, Middle HA |
||
Pollutant: | PCBs (Polychlorinated biphenyls) |
Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | Do Not List on 303(d) list (TMDL required list)(2012) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | Regional Water Board conclusion: This pollutant was considered for placement on the section 303(d) List in a previous Integrated Report cycle. No new information was reviewed for this current Integrated Report cycle. Therefore, the previous conclusion remains unchanged, and is as follows:
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 400 polychlorinated biphenyl (PCB) samples exceed the evaluation guideline. 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 (i.e., sufficient justification to not 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) None of the 400 samples exceeded the PCB evaluation guideline used to interpret the water quality objective, and this does not exceed the allowable frequency of 35 per the binomial distribution described in Section 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. |
Regional Board Decision Recommendation: | This region was not assessed this cycle. All decisions have been carried over from the previous cycle and remain the same. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
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LOE ID: | 25461 | ||||
Pollutant: | PCBs (Polychlorinated biphenyls) | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Total | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 400 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | None of the 400 polychlorinated biphenyl (PCB) analytes collected in the mainstem Trinity River exceed the evaluation guideline. Each of the 8 samples were analyzed for 50 PCB cogeners. The samples were collected as part of the Surface Water Ambient Water Monitoring Program (SWAMP). The data are found in the 5-Year Monitoring Report (NCRWQCB 2008). | ||||
Data Reference: | Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008 | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | Per the Basin Plan (NCRWQCB 2007, p. 3-4.00): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - North Coast Region (Region 1) | ||||
Evaluation Guideline: | Per the "Public Health Goal for Water Soluble Polychlorinated Biphenyls Expected to Found in Drinking Water" (OEHHA 2007): The health-protective concentration of water-soluble PCBs in
drinking water associated with a one in one million extra lifetime cancer risk is 0.09 ug/L. |
||||
Guideline Reference: | Public Health Goal for Water Soluble Polychlorinated Biphenyls Expected to Be Found in Drinking Water. Pesticide and Environmental Toxicology Branch, Office of Environmental Health Hazard Assessment, California Environmental Protection Agency | ||||
Spatial Representation: | Samples were collected from the Trinity River Watershed from 2 locations as follows: (1) from the North Fork Trinity River at Helena (SWAMP Station ID 106TRINFH), and (2) from the mainstem Trinity River at Salyer (SWAMP Station ID 106TRINSL). Samples were collected from well-mixed flows in glides or riffles. | ||||
Temporal Representation: | Samples were collected from February 2002 to June 2003. Site visits corresponded to fall, winter, spring and early summer seasonal conditions. | ||||
Environmental Conditions: | There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data. | ||||
QAPP Information: | Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 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 |
36934 |
Region 1 |
Trinity River HU, Middle HA |
||
Pollutant: | Specific Conductivity |
Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | Do Not List on 303(d) list (TMDL required list)(2012) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | This pollutant is being considered for placement on the section 303(d) list under section 3.2 of the Listing Policy. Under this section of the policy, a minimum of one line of evidence is needed to assess listing status. One line of evidence is available in the administrative record to assess this pollutant.
It should be noted that in the Decision for this water body-pollutant pair from the 2010 Integrated Report cycle a Use Rating of "Fully Supporting" was selected, when it should have been "Insufficient Information" for the reason stated in (3) below. 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) Zero of twenty samples exceed the objective and this sample size is insufficient to determine with the power and confidence of the Listing Policy if standards are not met. A minimum of either (a) 26 samples, or (b) greater than or equal 5 exceedances of the MUN objective with less than 26 samples is needed for application of Table 3.2. (4) Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
Regional Board Decision Recommendation: | This region was not assessed this cycle. All decisions have been carried over from the previous cycle and remain the same. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
|
|||||
LOE ID: | 21226 | ||||
Pollutant: | Specific Conductivity | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 20 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | None of the 20 specific conductivity samples collected from the Trinity River Watershed, Middle Trinity Hydrologic Area exceed the objective. The samples were collected as part of the Surface Water Ambient Water Monitoring Program (SWAMP). The data are found in the SWAMP Summary Report for the North Coast Region for Years 2000-2006 (NCRWQCB 2008). | ||||
Data Reference: | Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008 | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | Per 22 CCR 64449: The recommended secondary Maximum Content Level (MCL) is 900 uS/cm. | ||||
Objective/Criterion Reference: | Title 22. Division 4. Chapter 15. Sections 64400 et seq. California Code of Regulations | ||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | Samples were collected from the Trinity River Watershed from 2 locations as follows: (1) from the North Fork Trinity River at Helena (SWAMP Station ID TRINFH), and (2) from the mainstem Trinity River at Salyer (SWAMP Station ID TRINSL). Samples were collected from well-mixed flows in glides or riffles. | ||||
Temporal Representation: | Samples were collected from February 2002 to June 2003. Site visits corresponded to fall, winter, spring and early summer seasonal conditions. | ||||
Environmental Conditions: | There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data. | ||||
QAPP Information: | Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (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 |
38506 |
Region 1 |
Trinity River HU, Middle HA |
||
Pollutant: | Sulfates |
Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
Last Listing Cycle's Final Listing Decision: | Do Not List on 303(d) list (TMDL required list)(2012) |
Revision Status | Original |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | 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 to assess protection of the municipal and domestic supply (MUN) beneficial use in the mainstem Trinity River (LOE 46937), and one line of evidence is available to assess protection of the MUN beneficial use in the North Fork Trinity River (LOE 46938). It should be noted that no new data were assessed this Integrated Report cycle, however the decisions was changed as follows: (1) the use rating and decision language was edit to reflect that there were an insufficient number of samples available to determine with the power and confidence of the Listing Policy if the MUN beneficial use is being protected, and (2) data from LOE 25526 from the 2010 Integrated Report cycle were re-evaluated this current cycle in LOEs 46937 and 46938.
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 (i.e., sufficient justification to not 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) Zero of 10 samples from the mainstem Trinity River and zero of 10 samples from the North Fork Trinity River exceed the objective, however these sample sizes are insufficient to determine with the power and confidence of the Listing Policy if standards are not met, as a minimum of either (1) 26 samples, or (2) greater than or equal to 5 exceedances of the objective with less than 26 samples is needed for application of Table 3.2. (4) Pursuant to Section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
Regional Board Decision Recommendation: | This region was not assessed this cycle. All decisions have been carried over from the previous cycle and remain the same. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
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LOE ID: | 46937 | ||||
Pollutant: | Sulfates | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Not Recorded | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | None of the 10 sulfate samples collected in the North Fork Trinity River exceed the evaluation guideline. The samples were collected as part of the Surface Water Ambient Water Monitoring Program (SWAMP). The data are found in the 5-Year Monitoring Report (NCRWQCB 2008). This LOE and LOE 46938 replace LOE 25526 from the 2010 Integrated Report cycle. Data were split into two LOEs in order to assess each stream in its own LOE. | ||||
Data Reference: | Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008 | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | Per the Basin Plan (NCRWQCB 2007, p. 3-3.00): Waters shall not contain taste- or odor-producing substances in concentrations that impart undesirable tastes or odors to fish flesh or other edible products of aquatic origin, or that cause nuisance or adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - North Coast Region (Region 1) | ||||
Evaluation Guideline: | Per 22 CCR 64449 (Table 64449-B): The recommended secondary maximum contaminant level for sulfate is 250 mg/L. | ||||
Guideline Reference: | Title 22. Division 4. Chapter 15. Sections 64400 et seq. California Code of Regulations | ||||
Spatial Representation: | Samples were collected from the North Fork Trinity River at Helena (SWAMP Station ID 106TRINFH). Samples were collected from well-mixed flows in glides or riffles. | ||||
Temporal Representation: | Samples were collected from February 2002 to June 2003. Site visits corresponded to fall, winter, spring and early summer seasonal conditions. | ||||
Environmental Conditions: | There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data. | ||||
QAPP Information: | Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 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) | ||||
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|||||
LOE ID: | 25526 | ||||
Pollutant: | Sulfates | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Not Recorded | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 20 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | None of the 20 sulfate samples collected in the mainstem Trinity River exceed the evaluation guideline. The samples were collected as part of the Surface Water Ambient Water Monitoring Program (SWAMP). The data are found in the 5-Year Monitoring Report (NCRWQCB 2008). | ||||
Data Reference: | Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008 | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | Per the Basin Plan (NCRWQCB 2007, p. 3-3.00): Waters shall not contain taste- or odor-producing substances in concentrations that impart undesirable tastes or odors to fish flesh or other edible products of aquatic origin, or that cause nuisance or adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - North Coast Region (Region 1) | ||||
Evaluation Guideline: | Per 22 CCR 64449 (Table 64449-B): The recommended secondary maximum contaminant level for sulfate is 250 mg/L. | ||||
Guideline Reference: | Title 22. Division 4. Chapter 15. Sections 64400 et seq. California Code of Regulations | ||||
Spatial Representation: | Samples were collected from the Trinity River Watershed from 2 locations as follows: (1) from the North Fork Trinity River at Helena (SWAMP Station ID 106TRINFH), and (2) from the mainstem Trinity River at Salyer (SWAMP Station ID 106TRINSL). Samples were collected from well-mixed flows in glides or riffles. | ||||
Temporal Representation: | Samples were collected from February 2002 to June 2003. Site visits corresponded to fall, winter, spring and early summer seasonal conditions. | ||||
Environmental Conditions: | There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data. | ||||
QAPP Information: | Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 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) | ||||
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LOE ID: | 46938 | ||||
Pollutant: | Sulfates | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | Not Recorded | ||||
Beneficial Use: | Municipal & Domestic Supply | ||||
Number of Samples: | 10 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
Data Used to Assess Water Quality: | None of the 10 sulfate samples collected in the mainstem Trinity River exceed the evaluation guideline. The samples were collected as part of the Surface Water Ambient Water Monitoring Program (SWAMP). The data are found in the 5-Year Monitoring Report (NCRWQCB 2008). This LOE and LOE 46937 replace LOE 25526 from the 2010 Integrated Report cycle. Data were split into two LOEs in order to assess each stream in its own LOE. | ||||
Data Reference: | Surface Water Ambient Monitoring Program (SWAMP). Summary Report for the North Coast Region (RWQCB-1) for years 2000-2006. North Coast Regional Water Quality Control Board. March 2008 | ||||
SWAMP Data: | SWAMP | ||||
Water Quality Objective/Criterion: | Per the Basin Plan (NCRWQCB 2007, p. 3-3.00): Waters shall not contain taste- or odor-producing substances in concentrations that impart undesirable tastes or odors to fish flesh or other edible products of aquatic origin, or that cause nuisance or adversely affect beneficial uses. | ||||
Objective/Criterion Reference: | Water Quality Control Plan (Basin Plan) - North Coast Region (Region 1) | ||||
Evaluation Guideline: | Per 22 CCR 64449 (Table 64449-B): The recommended secondary maximum contaminant level for sulfate is 250 mg/L. | ||||
Guideline Reference: | Title 22. Division 4. Chapter 15. Sections 64400 et seq. California Code of Regulations | ||||
Spatial Representation: | Samples were collected from the mainstem Trinity River at Salyer (SWAMP Station ID 106TRINSL). Samples were collected from well-mixed flows in glides or riffles. | ||||
Temporal Representation: | Samples were collected from February 2002 to June 2003. Site visits corresponded to fall, winter, spring and early summer seasonal conditions. | ||||
Environmental Conditions: | There are no known environmental conditions (e.g., seasonality, land use practices, fire events, storms, etc.) that are related to these data. | ||||
QAPP Information: | Quality control was conducted in accordance with the SWAMP Quality Assurance Management Plan (SWAMP 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 |
34198 |
Region 1 |
Trinity River HU, Middle HA |
||
Pollutant: | Sedimentation/Siltation |
Final Listing Decision: | List on 303(d) list (being addressed by USEPA approved TMDL) |
Last Listing Cycle's Final Listing Decision: | List on 303(d) list (being addressed by USEPA approved TMDL)(2012) |
Revision Status | Original |
Sources: | Channel Erosion | Dam Construction | Erosion/Siltation | Flow Alteration/Regulation/Modification | Harvesting, Restoration, Residue Management | Hydromodification | Logging Road Construction/Maintenance | Mine Tailings | Placer Mining | Removal of Riparian Vegetation | Resource Extraction | Silvicultural Point Sources | Silviculture | Streambank Modification/Destabilization | Upstream Impoundment |
TMDL Name: | Trinity River Sediment |
TMDL Project Code: | 505 |
Date TMDL Approved by USEPA: | 12/20/2001 |
Impairment from Pollutant or Pollution: | Pollutant |
Regional Board Conclusion: | Regional Water Board Conclusion:
This pollutant was considered for placement on the section 303(d) List in a previous Integrated Report cycle. No new information was reviewed for this current Integrated Report cycle. Therefore, the previous conclusion remains unchanged, and is as follows: This pollutant is being considered for listing under section 2.2 of the Listing Policy. Under this section of the Policy, a minimum of one line of evidence is needed to assess listing status. US EPA was the lead agency for development of the technical TMDL for the Trinity River TMDL. US EPA established the Trinity River Technical TMDL for Sediment on December 20, 2001. Based on the readily available information, the weight of evidence indicates that there is sufficient justification in favor of placing this water segment-pollutant combination in the Water Quality Limited Segments Being Addressed portion of the section 303(d) list. |
Regional Board Decision Recommendation: | This region was not assessed this cycle. All decisions have been carried over from the previous cycle and remain the same. |
State Board Review of Regional Board Conclusion and Recommendation: | |
State Board Decision Recommendation: | After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board. |
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LOE ID: | 1671 | ||||
Pollutant: | Sedimentation/Siltation | ||||
LOE Subgroup: | Pollutant-Water | ||||
Matrix: | Water | ||||
Fraction: | None | ||||
Beneficial Use: | Cold Freshwater Habitat | ||||
Number of Samples: | 0 | ||||
Number of Exceedances: | 0 | ||||
Data and Information Type: | Not Specified | ||||
Data Used to Assess Water Quality: | Unspecified--This LOE is a placeholder to support a 303(d) listing decision made prior to 2006. | ||||
Data Reference: | Placeholder reference 2006 303(d) | ||||
SWAMP Data: | Non-SWAMP | ||||
Water Quality Objective/Criterion: | |||||
Objective/Criterion Reference: | |||||
Evaluation Guideline: | |||||
Guideline Reference: | |||||
Spatial Representation: | |||||
Temporal Representation: | |||||
Environmental Conditions: | |||||
QAPP Information: | QA Info Missing | ||||
QAPP Information Reference(s): | |||||