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

Supporting Information

Regional Board 4 - Los Angeles Region

Water Body Name: Santa Clara River Reach 5 (Blue Cut gaging station to West Pier Hwy 99 Bridge) (was named Santa Clara River Reach 7 on 2002 303(d) list)
Water Body ID: CAR4035100019990203102901
Water Body Type: River & Stream
 
DECISION ID
7166
 
Pollutant: Ammonia
Final Listing Decision: Delist from 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)(2006)
Revision Status Revised
Reason for Delisting: State determines water quality standard is being met
TMDL Name: Santa Clara River Nitrogen
TMDL Project Code: 227
Date TMDL Approved by USEPA: 03/18/2004
Impairment from Pollutant or Pollution: Pollutant
 
Weight of Evidence: This pollutant is being considered for removal from the section 303(d) list under section 4.1 of the Listing Policy. Under this section a single line of evidence is necessary to assess listing status.

Three lines of evidence are available in the administrative record to assess this pollutant.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification for removing this water segment-pollutant combination from the section 303(d) list.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. Two of 117 samples exceeded the pH and temperature dependent Basin Plan 30-day average objective for ammonia and this does not exceed the allowable frequency listed in Table 4.1 of the Listing Policy.
4. A remedial program other than a TMDL had been developed, approved, and implemented. This program was expected to result in attainment of the standard.
5. The USEPA final decision for the 2006 303(d) list added this listing to the 'being addressed by USEPA approved TMDL' portion of the 303(d) List because the Santa Clara River Nitrogen TMDL and implementation plan was approved for this water segment-pollutant combination by USEPA on 03/18/2004.
6. Analysis of the data, after USEPA approval of the TMDL and implementation of nitrification and denitrification, indicate that standards are being currently attained.
7. Pursuant to section 4.11 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 removed from the section 303(d) list because applicable water quality standards for the pollutant are not being exceeded.
 
SWRCB Board Decision / Staff Recommendation:
 
USEPA Decision:
 
 
Lines of Evidence (LOEs) for Decision ID 7166
 
LOE ID: 2117
 
Pollutant: Ammonia
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 71
Number of Exceedances: 2
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Two of 71 samples exceeded the 30-day average water quality objective and none of 95 samples exceeded the one-hour average water quality objective (LACSD, 2004b; LACSD, 2006).
Data Reference: Placeholder reference 2006 303(d)
 
Water Quality Objective/Criterion: Los Angeles RWQCB Basin Plan Amendment 2003: The one-hour average objective is dependent on pH and the presence or absence of early life stages of fish (ELS) but not temperature. The 30-day average objective is dependent on pH, temperature and ELS [Tables 3-1 to 3-3].
Objective/Criterion Reference: Placeholder reference 2006 303(d)
 
Evaluation Guideline: USEPA 1999 Update of Ambient Water Quality Criteria for Ammonia.
Guideline Reference: Placeholder reference 2006 303(d)
 
Spatial Representation: Three receiving water stations: RC, RD, and RE.
Temporal Representation: Samples were collected from July 2003 through November 2005. New management practices were begun at the beginning of this period and may have resulted in a change in water quality. Water quality measurements collected before the implementation of management measures were not considered representative of current conditions.
Environmental Conditions:
QAPP Information: QA Info Missing
QAPP Information Reference(s):
 
LOE ID: 2115
 
Pollutant: Ammonia
LOE Subgroup: Narrative Description Data
Matrix: Not Specified
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: An alternative enforceable program is in place that will address ammonia water quality standards exceedances for this Reach. In June 1995, the seven water reclamation plants discharging in the San Gabriel River and Santa Clara River watersheds received NPDES permits containing requirements regarding compliance with the Basin Plan water quality objectives for ammonia. In accordance with these permits, the Los Angeles County Sanitation Districts have been pursuing the addition of
nitrification and denitrification facilities at each of these plants to comply
with the ammonia objectives. By June 2003, it is expected that these new
facilities will be operational and ammonia will be drastically reduced.
Research facility operation shows that the monthly average ammonia
concentration fully complies with the chronic ammonia objective that are
expected to be applicable in June 2003 (SWRCB, 2003).

It is probable that the majority of ammonia discharged to this water body
was contributed by POTWs. Information in the record indicates that the
majority (over 95%) of the ammonia in the Los Angeles River was
contributed by POTWs. It is probable that the contribution in the San
Gabriel River watershed is dominated by contributions from POTWs as
well. Generally, concentrations of ammonia upstream of the treatment
plants is much lower than downstream concentrations (up to an order of
magnitude difference).
Data Reference: Placeholder reference 2006 303(d)
 
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):
 
LOE ID: 30255
 
Pollutant: Ammonia
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Warm Freshwater Habitat
Aquatic Life Use: Freshwater Replenishment | Preservation of Rare & Endangered Species | Wetland Habitat | Wildlife Habitat
 
Number of Samples: 45
Number of Exceedances: 0
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: 0 of 45 samples exceeded the Basin Plan 30-day average objective for ammonia. Water quality samples were taken and analyzed for ammonia in accordance County Sanitation Districts of Los Angeles County Monitoring and Reporting Program.
Data Reference: NPDES receiving water monitoring reports for Saugus Water Reclamation Plant (NPDES No. CA0054313) and Valencia Water Reclamation Plant (NPDES No. CA0054216).
 
Water Quality Objective/Criterion: The Basin Plan states, "In order to protect aquatic life, ammonia concentrations in inland surface waters characteristic of freshwater shall not exceed the values calculated for the appropriate instream conditions shown in Tables 3-1 to 3-3." The one-hour average objective is dependent on pH and the presence or absence of early life stages of fish (ELS) but not temperature. The 30-day average objective is dependent on pH, temperature and ELS in Tables 3-1 to 3-3. The ammonia objectives and the pH and temperature dependent formulas are found in Attachment A of Regional Board Resolution No. 2002-011.
Objective/Criterion Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan
  Basin Plan Amendments to the Water Quality Control Plan Los Angeles Region R4 Basin Plan as of 02/02/2009
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The listed monitoring stations for this water body pollutant combination include: RC located approximately 300 feet upstream of point of discharge 001 to the river, RD located approximately 300 feet downstream of point of discharge 001 to the river, and RE located approximately 1.6 miles upstream of Chiquita Canyon Road.
Temporal Representation: Grab samples were taken and analyzed on a monthly basis from December 2005 to February 2007.
Environmental Conditions:
QAPP Information: Data was collected in compliance with the sampling and monitoring procedures detailed in Sanitation Districts of Los Angeles County's Valencia Water Reclamation Plant (NPDES No. CA0054216) Monitoring and Reporting Program.
QAPP Information Reference(s): Valencia Water Reclamation Plant Monitoring and reporting program for NPDES No. CA0054216 (County Sanitation Districts of Los Angeles County)
 
DECISION ID
4102
 
Pollutant: Nitrate and Nitrite
Final Listing Decision: Delist from 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)(2006)
Revision Status Revised
Reason for Delisting: State determines water quality standard is being met
TMDL Name: Santa Clara River Nitrogen
TMDL Project Code: 227
Date TMDL Approved by USEPA: 03/18/2004
Impairment from Pollutant or Pollution: Pollutant
 
Weight of Evidence: This pollutant is being considered for removal from the section 303(d) list under section 4.1 of the Listing Policy. Under this section a single line of evidence is necessary to assess listing status.

Three lines of evidence are available in the administrative record to assess this pollutant.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification for removing this water segment-pollutant combination from the section 303(d) list.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. Nine of 133 samples exceeded the Basin Plan reach specific water quality objective for nitrate-nitrogen plus nitrite-nitrogen and this does not exceed the allowable frequency listed in Table 4.1 of the Listing Policy.
4. A remedial program other than a TMDL had been developed, approved, and implemented. This program was expected to result in attainment of the standard.
5. The USEPA final decision for the 2006 303(d) list added this listing to the 'being addressed by USEPA approved TMDL' portion of the 303(d) List because the Santa Clara River Nitrogen TMDL and implementation plan was approved for this water segment-pollutant combination by USEPA on 03/18/2004.
6. Analysis of the data, after USEPA approval of the TMDL and implementation of nitrification and denitrification, indicate that standards are being currently attained.
7. Pursuant to section 4.11 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 removed from the section 303(d) list because applicable water quality standards for the pollutant are not being exceeded.
 
SWRCB Board Decision / Staff Recommendation:
 
USEPA Decision:
 
 
Lines of Evidence (LOEs) for Decision ID 4102
 
LOE ID: 2113
 
Pollutant: Nitrate and Nitrite
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 29
Number of Exceedances: 2
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Two of 29 samples exceed the water quality objective (LACSD, 2004b).
Data Reference: Placeholder reference 2006 303(d)
 
Water Quality Objective/Criterion: Los Angeles RWQCB Basin Plan: Water shall not exceed 5 mg/L as nitrate-nitrogen plus nitrite-nitrogen as applicable for the protection of existing water quality conditions [Table 3-8].
Objective/Criterion Reference: Placeholder reference 2006 303(d)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Samples were taken at four samples stations RC, RD, RE, and RB01.
Temporal Representation: Samples were taken from 9/10/03 to 5/12/04 at monthly intervals.
Environmental Conditions: The Districts' Valencia Water Reclamation Plant, which is located in Reach 7, was partially converted to NDN mode starting May 12, 2003, and was fully converted to NDN mode on June 18, 2003. The implementation of NDN at these WRPs represents a significant change in water quality nitrogen conditions in Reach 5 of the Santa Clara River.
QAPP Information: Quality Assurance Document Of The County Sanitation Districts Of Los Angeles County. July 2003.
QAPP Information Reference(s):
 
LOE ID: 2114
 
Pollutant: Nitrate and Nitrite
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Dissolved
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 8
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: None of 8 samples exceed the water quality objective. Data obtained from the United Water Conservation District (LACSD, 2004b).
Data Reference: Placeholder reference 2006 303(d)
 
Water Quality Objective/Criterion: Los Angeles RQWCB Basin Plan: Water shall not exceed 5 mg/L as nitrate-nitrogen plus nitrite-nitrogen as applicable for the protection of existing water quality conditions [Table 3-8].
Objective/Criterion Reference: Placeholder reference 2006 303(d)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Blue Cut sampling site near Los Angeles/ Ventura county line.
Temporal Representation: Samples were taken at monthly intervals from 9/10/03 to 4/27/04.
Environmental Conditions:
QAPP Information: Fruit Growers Laboratory Quality Manual.
QAPP Information Reference(s):
 
LOE ID: 30270
 
Pollutant: Nitrate and Nitrite
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Municipal & Domestic Supply
 
Number of Samples: 96
Number of Exceedances: 7
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: Seven of 96 samples exceeded the Basin Plan reach specific water quality objective for nitrate-nitrogen plus nitrite-nitrogen. Water quality samples were taken and analyzed for nitrate-nitrogen plus nitrite-nitrogen in accordance County Sanitation Districts of Los Angeles County Monitoring and Reporting Program.
Data Reference: NPDES receiving water monitoring reports for Saugus Water Reclamation Plant (NPDES No. CA0054313) and Valencia Water Reclamation Plant (NPDES No. CA0054216).
 
Water Quality Objective/Criterion: The Basin Plan lists a reach specific water quality objective of 5.0 mg/L for nitrate-nitrogen plus nitrite-nitrogen (NO3-N + NO2-N).
Objective/Criterion Reference: Water Quality Control Plan Los Angeles Region R4 Basin Plan
  Basin Plan Amendments to the Water Quality Control Plan Los Angeles Region R4 Basin Plan as of 02/02/2009
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The listed monitoring stations for this water body pollutant combination include: RC located approximately 300 feet upstream of point of discharge 001 to the river, RD located approximately 300 feet downstream of point of discharge 001 to the river, and RE located approximately 1.6 miles upstream of Chiquita Canyon Road.
Temporal Representation: Grab samples were taken and analyzed on a monthly basis from June 2004 to February 2007.
Environmental Conditions:
QAPP Information: Data was collected in compliance with the sampling and monitoring procedures detailed in Sanitation Districts of Los Angeles County's Valencia Water Reclamation Plant (NPDES No. CA0054216) Monitoring and Reporting Program.
QAPP Information Reference(s): Valencia Water Reclamation Plant Monitoring and reporting program for NPDES No. CA0054216 (County Sanitation Districts of Los Angeles County)
 
DECISION ID
9056
 
Pollutant: DDT (Dichlorodiphenyltrichloroethane)
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.

Based on the readily available data and information, the weight of evidence indicates that there is not sufficient justification for placing the water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. One of two SWAMP samples exceed the CTR human health for consumption of water and organisms and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Zero of 18 Valencia WWRP samples that exceed the CTR human health for consumption of water and organisms and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
5. Pursuant to section 4.11 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 9056
 
LOE ID: 30239
 
Pollutant: DDT (Dichlorodiphenyltrichloroethane)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 18
Number of Exceedances: 0
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: Zero of 18 samples exceeded the California Toxics Rule Human Health consumption of water and organisms criteria for DDT.
Data Reference: NPDES receiving water monitoring reports for Saugus Water Reclamation Plant (NPDES No. CA0054313) and Valencia Water Reclamation Plant (NPDES No. CA0054216).
 
Water Quality Objective/Criterion: The California Toxics Rule lists a Human Health consumption of water and organisms criteria of 0.00059 ug/L for DDT.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The listed monitoring stations for this water body pollutant combination include: RC located approximately 300 feet upstream of point of discharge 001 to the river, RD located approximately 300 feet downstream of point of discharge 001 to the river, and RE located approximately 1.6 miles upstream of Chiquita Canyon Road.
Temporal Representation: Grab samples taken and analyzed from July 2004 to February 2007.
Environmental Conditions:
QAPP Information: Data collected for compliance with Valencia WWRP MRP.
QAPP Information Reference(s): Valencia Water Reclamation Plant Monitoring and reporting program for NPDES No. CA0054216 (County Sanitation Districts of Los Angeles County)
 
LOE ID: 8313
 
Pollutant: DDT (Dichlorodiphenyltrichloroethane)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 2
Number of Exceedances: 1
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: One of two samples exceeded the California Toxics Rule Human Health consumption of water and organisms criteria for DDT. Water quality samples were taken and analyzed for DDT in accordance with SWAMP Monitoring and testing parameters.
Data Reference: Surface Water Ambient Monitoring Program data for all watersheds in the Los Angeles Region 2001-2005.
 
Water Quality Objective/Criterion: The California Toxics Rule lists a Human Health consumption of water and organisms criteria of 0.00059 ug/L for DDT.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The listed monitoring stations for this water body pollutant combination include: 403STCCTC located at Castaic Creek (Lat: 34.49668, Long: -118.61228) and 403STCNRB Newhall Ranch Blue Cut (Lat: 34.40177, Long: -118.70119).
Temporal Representation: Grab samples were taken on 11/13/2001 at monitoring stations 403STCCTC and 403STCNRB and on 10/30/2001 at monitoring station 403STCNRB.
Environmental Conditions:
QAPP Information: Data was collected in compliance with the sampling and monitoring procedures detailed in State of California's Surface Water Ambient Monitoring Program Quality Assurance Management Plan.
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
5392
 
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)(2006)
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.

Based on the readily available data and information, the weight of evidence indicates that there is not sufficient justification for placing the 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. There are 1 out of 2 samples that exceed the CTR human health for consumption of water and organisms and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 4.11 of the Listing Policy, no additional data and information are available indicating that standards are 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 5392
 
LOE ID: 21325
 
Pollutant: PCBs (Polychlorinated biphenyls)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
Aquatic Life Use: Freshwater Replenishment | Preservation of Rare & Endangered Species | Wetland Habitat | Wildlife Habitat
 
Number of Samples: 2
Number of Exceedances: 1
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: One of two samples exceeded the California Toxics Rule lists a human health for consumption of water and organisms limit. Water quality samples were taken and analyzed for PCBs in accordance with SWAMP Monitoring and testing parameters.
Data Reference: Surface Water Ambient Monitoring Program data for all watersheds in the Los Angeles Region 2001-2005.
 
Water Quality Objective/Criterion: The California Toxics Rule lists a human health for consumption of water and organisms limit of 0.017 ug/L for Polychlorinated biphenyls (PCBs).
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Monitoring station 403STCNRB Newhall Ranch Blue Cut (Lat: 34.40177, Long: -118.70119).
Temporal Representation: Grab samples were taken on 11/13/2001 and on 10/30/2001.
Environmental Conditions:
QAPP Information: Data was collected in compliance with the sampling and monitoring procedures detailed in State of California's Surface Water Ambient Monitoring Program Quality Assurance Management Plan.
QAPP Information Reference(s): Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)
 
LOE ID: 2123
 
Pollutant: PCBs (Polychlorinated biphenyls)
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial 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: Two summations of all PCB congeners with 1 exceeding the CTR (SWAMP, 2004).
Data Reference: Placeholder reference 2006 303(d)
 
Water Quality Objective/Criterion: California Toxics Rule (CTR) Freshwater Criterion Continuous Concentration 0.014 ug/L (40 CFR Part 131).
Objective/Criterion Reference: Placeholder reference 2006 303(d)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: SWAMP monitoring site Newhall Ranch Blue Cut (403STCCTC).
Temporal Representation: Samples were collected in October and November of 2001.
Environmental Conditions:
QAPP Information: SWAMP Quality Assurance Plan.
QAPP Information Reference(s):
 
DECISION ID
9808
 
Pollutant: Chlorodibromomethane
Final Listing Decision: List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Sources: Source Unknown
Expected TMDL Completion Date: 2021
Impairment from Pollutant or Pollution: Pollutant
 
Weight of Evidence: This pollutant is 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.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification for placing this water segment-pollutant combination on the section 303(d) list 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. Five of 12 samples exceeded the the CTR Human Health Criteria for Water & Organisms for Chlorodibromomethane and this exceeds 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 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 9808
 
LOE ID: 21177
 
Pollutant: Chlorodibromomethane
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 12
Number of Exceedances: 5
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: Five of 12 samples exceeded the CTR Human Health Criteria for Water & Organisms for Chlorodibromomethane. Water quality samples were taken for Chlorodibromomethane in accordance with County Santitation Districts monitoring parameters.
Data Reference: NPDES receiving water monitoring reports for Saugus Water Reclamation Plant (NPDES No. CA0054313) and Valencia Water Reclamation Plant (NPDES No. CA0054216).
 
Water Quality Objective/Criterion: The California Toxics Rule lists a Human Health water and fish consumption criteria of 0.56 ug/L for Chlorodibromomethane to protect human health.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The County Santitation District of Los Angeles County conducted sampling at Santa Clara Reach 5 at the following monitoring stations : RC located approximately 300 feet upstream of point of discharge 001 to the river, RD located approximately 300 feet downstream of point of discharge 001 to the river, and RE located approximately 1.6 miles upstream of Chiquita Canyon Road.
Temporal Representation: Grab samples were taken and analyzed on quarterly basis from July 2004 to February 2007
Environmental Conditions:
QAPP Information: Data was collected in compliance with the sampling and monitoring procedures detailed in NPDES Permit No. CA0054216 Monitoring and Reporting Program.
QAPP Information Reference(s): Valencia Water Reclamation Plant Monitoring and reporting program for NPDES No. CA0054216 (County Sanitation Districts of Los Angeles County)
 
DECISION ID
9068
 
Pollutant: Dichlorobromomethane
Final Listing Decision: List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Sources: Source Unknown
Expected TMDL Completion Date: 2021
Impairment from Pollutant or Pollution: Pollutant
 
Weight of Evidence: This pollutant is 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.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification for placing this water segment-pollutant combination on the section 303(d) list 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. Nine of 17 samples exceeded the CTR Human Health Criteria for Water & Organisms for Dichlorobromomethane and this exceeds 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 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 9068
 
LOE ID: 8346
 
Pollutant: Dichlorobromomethane
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 17
Number of Exceedances: 9
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: Nine of 17 samples exceeded the CTR Human Health Criteria for Water & Organisms for Dichlorobromomethane. Water quality samples were taken for Dichlorobromomethane in accordance with County Sanititation Districts monitoring parameters.
Data Reference: NPDES receiving water monitoring reports for Saugus Water Reclamation Plant (NPDES No. CA0054313) and Valencia Water Reclamation Plant (NPDES No. CA0054216).
 
Water Quality Objective/Criterion: The California Toxics Rule lists a Human Health water and fish consumption criteria of 0.56 ug/L for Dichlorobromomethane to protect human health.
Objective/Criterion Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The listed monitoring stations for this water body pollutant combination include: RC located approximately 300 feet upstream of point of discharge 001 to the river, RD located approximately 300 feet downstream of point of discharge 001 to the river, and RE located approximately 1.6 miles upstream of Chiquita Canyon Road.
Temporal Representation: Grab samples were taken and analyzed on quarterly basis from July 2004 to February 2007
Environmental Conditions:
QAPP Information: Data was collected in compliance with the sampling and monitoring procedures detailed in NPDES Permit No. CA0054216 Monitoring and Reporting Program.
QAPP Information Reference(s): Valencia Water Reclamation Plant Monitoring and reporting program for NPDES No. CA0054216 (County Sanitation Districts of Los Angeles County)
 
DECISION ID
9302
 
Pollutant: Iron
Final Listing Decision: List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Sources: Source Unknown
Expected TMDL Completion Date: 2021
Impairment from Pollutant or Pollution: Pollutant
 
Weight of Evidence: This pollutant is 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.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification for placing this water segment-pollutant combination on the section 303(d) list 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. Nine of 30 samples exceeded the U.S. Environmental Protection Agency National Recommended Water Quality Criteria for Freshwater Aquatic Life Protection for Iron 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 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 9302
 
LOE ID: 4799
 
Pollutant: Iron
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Warm Freshwater Habitat
Aquatic Life Use: Freshwater Replenishment | Preservation of Rare & Endangered Species | Wetland Habitat | Wildlife Habitat
 
Number of Samples: 30
Number of Exceedances: 9
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: Nine of 30 samples exceeded the U.S. Environmental Protection Agency National Recommended Water Quality Criteria for Freshwater Aquatic Life Protection for Iron. Water quality samples were taken for Iron in accordance County Sanitation Districts of Los Angeles County monitoring and reporting program.
Data Reference: NPDES receiving water monitoring reports for Saugus Water Reclamation Plant (NPDES No. CA0054313) and Valencia Water Reclamation Plant (NPDES No. CA0054216).
 
Water Quality Objective/Criterion: The U.S. Environmental Protection Agency National Recommended Water Quality Criteria for Freshwater Aquatic Life Protection is 1 mg/L.
Objective/Criterion Reference: National recommended water quality criteria: 2002. EPA-822-R-02-047 Washington, D.C. USEPA
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The listed monitoring stations for this water body pollutant combination include: RC located approximately 300 feet upstream of point of discharge 001 to the river, RD located approximately 300 feet downstream of point of discharge 001 to the river, and RE located approximately 1.6 miles upstream of Chiquita Canyon Road.
Temporal Representation: Grab samples were taken and analyzed on quarterly basis from July 2004 to February 2007
Environmental Conditions:
QAPP Information: Data collected for compliance with Valencia WWRP Monitoring and Reporting Program.
QAPP Information Reference(s): Valencia Water Reclamation Plant Monitoring and reporting program for NPDES No. CA0054216 (County Sanitation Districts of Los Angeles County)
 
DECISION ID
9316
 
Pollutant: Specific Conductivity
Final Listing Decision: List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Sources: Source Unknown
Expected TMDL Completion Date: 2021
Impairment from Pollutant or Pollution: Pollutant
 
Weight of Evidence: This pollutant is being considered for placement on the section 303(d) list under section 3.2 of the Listing Policy. Under section 3.2 a single line of evidence is necessary to assess listing status.

Two lines of evidence are available in the administrative record to assess this pollutant.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification for placing this water segment-pollutant combination on the section 303(d) list 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. 99 of 104 County Sanitation Distric of Los Angeles County samples exceed the Agricultural Water Quality Goals published by the Food and Agriculture Organization of the United Nations and this exceeds the allowable frequency listed in Table 3.2 of the Listing Policy.
4. Eight of eight SWAMP samples exceed the Agricultural Water Quality Goals published by the Food and Agriculture Organization of the United Nations and this exceeds the allowable frequency listed in Table 3.2 of the Listing Policy.
5. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are met.
 
RWQCB Board Decision / Staff Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should be placed on the section 303(d) list because applicable water quality standards are exceeded and a pollutant contributes to or causes the problem.
 
SWRCB Board Decision / Staff Recommendation:
 
USEPA Decision:
 
 
Lines of Evidence (LOEs) for Decision ID 9316
 
LOE ID: 30230
 
Pollutant: Specific Conductance
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 104
Number of Exceedances: 99
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: 99 of 104 samples exceeded the Agricultural Water Quality Goals published by the Food and Agriculture Organization of the United Nations for specific conductance.
Data Reference: NPDES receiving water monitoring reports for Saugus Water Reclamation Plant (NPDES No. CA0054313) and Valencia Water Reclamation Plant (NPDES No. CA0054216).
 
Water Quality Objective/Criterion: The Agricultural Water Quality Goals published by the Food and Agriculture Organization of the United Nations is 700 umhos/cm for Specific Conductance.
Objective/Criterion Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The listed monitoring stations for this water body pollutant combination include: RC located approximately 300 feet upstream of point of discharge 001 to the river, RD located approximately 300 feet downstream of point of discharge 001 to the river, and RE located approximately 1.6 miles upstream of Chiquita Canyon Road.
Temporal Representation: Grab samples taken and analyzed on monthly basis from June 2004 to February 2007.
Environmental Conditions:
QAPP Information: Data was collected in compliance with the sampling and monitoring procedures detailed in NPDES Permit No. CA0054216 Monitoring and Reporting Program.
QAPP Information Reference(s): Valencia Water Reclamation Plant Monitoring and reporting program for NPDES No. CA0054216 (County Sanitation Districts of Los Angeles County)
 
LOE ID: 8755
 
Pollutant: Specific Conductance
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Agricultural Supply
 
Number of Samples: 8
Number of Exceedances: 8
 
Data and Information Type: Fixed station physical/chemical (conventional plus toxic pollutants)
Data Used to Assess Water Quality: Eight of eight samples exceeded the Agricultural Water Quality Goals published by the Food and Agriculture Organization of the United Nations for specific conductance. Water quality samples were taken for specific conductance in accordance with regional SWAMP Monitoring parameters.
Data Reference: Surface Water Ambient Monitoring Program data for all watersheds in the Los Angeles Region 2001-2005.
 
Water Quality Objective/Criterion: The Agricultural Water Quality Goals published by the Food and Agriculture Organization of the United Nations is 700 umhos/cm for Specific Conductance.
Objective/Criterion Reference: Water Quality for Agriculture, Food and Agriculture Organization of the United Nations - Irrigation and Drainage Paper No. 29, Rev 1, Rome (1985)
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The Los Angeles Regional Board sampled and measured specific conductance at Santa Clara River Reach 5 at the following stations : 403STC004 located near Chiquito Canyon Road-Newhall Property, 403STC029 located at Elizabeth Canyon (Lat: 34.6145, Long: -118.55852), 403STC065 located at Elizabeth Canyon (Lat: 34.63099, Long: -118.5359), 403STC068 located in the river (Lat: 34.40565, Long: -118.67533), 403STCCTC located at Castaic Creek (Lat: 34.49668, Long: -118.61228), and 403STCNRB Newhall Ranch Blue Cut.
Temporal Representation: Grab samples were taken on 02/20/2003 at monitoring stations 403STC029 and 403STC065; on 02/25/2003 at monitoring stations 403STC004 and 403STC068; on 11/13/2001 at monitoring stations 403STCCTC and 403STCNRB; and on 10/30/2001 at monitoring stations 403STC004 and 403STCNRB.
Environmental Conditions:
QAPP Information: Data was collected in compliance with the sampling and monitoring procedures detailed in State of California's Surface Water Ambient Monitoring Program Quality Assurance Management Plan.
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)