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

Supporting Information

Regional Board 8 - Santa Ana Region

Water Body Name: Santa Ana River Reach 6
Water Body ID: CAR8015700020080921214849
Water Body Type: Coastal & Bay Shoreline
 
DECISION ID
16545
 
Pollutant: Arsenic
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Weight of Evidence: This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.

One (1) line of evidence is available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. None of twenty-four (24) samples exceeded the California Toxics Rule and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
RWQCB Board Decision / Staff Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
 
SWRCB Board Decision / Staff Recommendation:
 
USEPA Decision:
 
 
Lines of Evidence (LOEs) for Decision ID 16545
 
LOE ID: 28298
 
Pollutant: Arsenic
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 24
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Of the 24 samples taken, none exceeded the standards/guidelines listed above. This data was obtained from the self monitoring reports submitted by San Bernardino County Flood Control District Storm Water Program.
Data Reference: San Bernardino County Flood Control District data from storm water program.
 
Water Quality Objective/Criterion: Santa Ana Region's Basin Plan Narrative Objective: The concentrations of toxic pollutants in the water column, sediments, or biota shall not adversely affect beneficial uses.
Objective/Criterion Reference: Water Quality Control Plan-Santa Ana Region
 
Evaluation Guideline: California Toxics Rule Aquatic Life: Arsenic 4-day avg. 150 ug/l, and 1-hr avg. 340 ug/l.
Guideline Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
  Compilation of Water Quality Goals
 
Spatial Representation: The samples were taken at one station on the Santa Ana River at the upstream end of the Seven Oaks Dam basin in the unincorporated area of San Bernardino County.
Temporal Representation: The samples were taken on the following dates: 2/17/94, 3/17/94, 11/10/94, 1/23/95, 3/10/95, 12/12/95, 1/31/96, 2/19/96, 3/4/96, 3/13/96, 10/30/96, 11/21/96, 12/9/96, 11/26/97, 1/9/98, 2/3/98, 3/25/98, 1/25/00, 1/24/01, 2/23/01, 4/7/01, 12/26/03, 2/3/04, 2/19/04.
Environmental Conditions: The samples were taken as grabs during the wet weather.
QAPP Information: The data’s quality is deemed appropriate because it originated from an NPDES discharger in compliance with their monitoring and reporting program requirements.
QAPP Information Reference(s):
 
DECISION ID
16551
 
Pollutant: Copper | Lead | Zinc
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Weight of Evidence: This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.

Two lines of evidence are available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. None of 26 samples exceeded the California Toxics Rule and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
RWQCB Board Decision / Staff Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
 
SWRCB Board Decision / Staff Recommendation:
 
USEPA Decision:
 
 
Lines of Evidence (LOEs) for Decision ID 16551
 
LOE ID: 28304
 
Pollutant: Copper | Lead | Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 6
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Of the 6 samples taken, none exceeded the standards/guidelines listed above. This data was obtained from the self monitoring reports submitted by San Bernardino County Flood Control District Storm Water Program.
Data Reference: San Bernardino County Flood Control District data from storm water program.
 
Water Quality Objective/Criterion: Santa Ana Region's Basin Plan Narrative Objective: The concentrations of toxic pollutants in the water column, sediments, or biota shall not adversely affect beneficial uses.
Objective/Criterion Reference: Water Quality Control Plan-Santa Ana Region
 
Evaluation Guideline: California Toxics Rule Aquatic Life: The following criteria varies according to hardness: copper: 11/1/94: 14.92 ug/l, 6/6/95: 11.08 ug/l, 8/14/95:12.68 ug/l, 7/30/96: 17.92 ug/l, 8/20/97: 20.51 ug/l, 7/29/98:11.48 ug/l; lead 11/1/94: 11.08 ug/l, 6/6/95: 59.51 ug/l, 8/14/95: 71.40 ug/l, 7/30/96: 114.02 ug/l, 8/20/97: 136.80 ug/l, 7/29/98: 62.44 ug/l; zinc: 11/1/94: 126.89 ug/l, 6/6/95: 97.07 ug/l, 8/14/95: 109.58 ug/l, 7/30/96: 149.64 ug/l, 8/20/97: 169.93 ug/l, 7/29/98: 100.22 ug/l.
.
Guideline Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Spatial Representation: The samples were taken at one station on the Santa Ana River at the upstream end of the Seven Oaks Dam basin in the unincorporated area of San Bernardino County.
Temporal Representation: The samples were collected on 11/1/94, 6/6/95, 8/14/95, 7/30/96, 8/20/97, 7/29/98
Environmental Conditions: The samples were taken during the dry weather.
QAPP Information: The data’s quality is deemed appropriate because it originated from an NPDES discharger in compliance with their monitoring and reporting program requirements.
QAPP Information Reference(s):
 
LOE ID: 28303
 
Pollutant: Copper | Lead | Zinc
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 20
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Of the 20 samples taken, none exceeded the standards/guidelines listed above. This data was obtained from the self monitoring reports submitted by San Bernardino County Flood Control District Storm Water Program.
Data Reference: San Bernardino County Flood Control District data from storm water program.
 
Water Quality Objective/Criterion: Santa Ana Region's Basin Plan Narrative Objective: The concentrations of toxic pollutants in the water column, sediments, or biota shall not adversely affect beneficial uses.
Objective/Criterion Reference: Water Quality Control Plan-Santa Ana Region
 
Evaluation Guideline: California Toxics Rule Aquatic Life (this criteria varies according to hardness as follows): copper: 2/17/94: 18.31 ug/l, 3/19/94: 945.94 ug/l, 11/10/94: 21.41 ug/l, 1/23/95: 10.94 ug/l, 3/10/95: 10.54 ug/l, 12/12/95: 11.48ug/l, 1/31/96: 19.22 ug/l, 2/19/96: 41.88 ug/l, 3/4/96: 11.48 ug/l, 3/13/96: 10.94 ug/l, 10/30/96: 12.54 ug/l, 11/21/96: 13.6 ug/l, 12/9/96: 13.34 ug/l, 11/26/97: 50.47 ug/l, 1/9/98: 15.31 ug/l, 2/3/98: 13.34 ug/l, 3/25/98: 10.94 ug/l, 12/26/03: 13.47 ug/l, 2/3/04: 12.54 ug/l, 2/19/04: 12.54 ug/l.
Guideline Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Spatial Representation: The samples were taken at one station on the Santa Ana River at the upstream end of the Seven Oaks Dam basin in the unincorporated area of San Bernardino County.
Temporal Representation: The samples were taken on the following dates: 2/17/94, 3/19/94, 11/10/94, 1/23/95, 3/10/95, 12/12/95, 1/31/96, 2/19/96, 3/4/96, 3/13/96, 10/30/96, 11/21/96, 12/9/96, 11/26/97, 1/9/98, 2/3/98, 3/25/98, 12/26/03, 2/3/04, 2/19/04.
Environmental Conditions: The samples were taken as grabs during the wet weather.
QAPP Information: The data’s quality is deemed appropriate because it originated from an NPDES discharger in compliance with their monitoring and reporting program requirements.
QAPP Information Reference(s):
 
DECISION ID
16552
 
Pollutant: Iron
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. One of the samples exceed the water quality objective.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. One of six samples exceeded the CTR criteria and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. There were several exceedances of the chronic criteria during the wet weather but the wet weather is appropriately assessed using acute criteria only. So these exceedances were not taken into consideration.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
RWQCB Board Decision / Staff Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
 
SWRCB Board Decision / Staff Recommendation:
 
USEPA Decision:
 
 
Lines of Evidence (LOEs) for Decision ID 16552
 
LOE ID: 28305
 
Pollutant: Iron
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 6
Number of Exceedances: 1
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Of the 6 samples taken, one exceeded the Califorina Toxics Rule. This data was obtained from the self monitoring reports submitted by San Bernardino County Flood Control District Storm Water Program.
Data Reference: San Bernardino County Flood Control District data from storm water program.
 
Water Quality Objective/Criterion: Santa Ana Region's Basin Plan Narrative Objective: The concentrations of toxic pollutants in the water column, sediments, or biota shall not adversely affect beneficial uses.
Objective/Criterion Reference: Water Quality Control Plan-Santa Ana Region
 
Evaluation Guideline: US EPA National Ambient Water Quality Criteria Toxicity: Iron chronic criteria 4-day avg. 1,000 ug/l.
Guideline Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
  Compilation of Water Quality Goals
 
Spatial Representation: The samples were taken at one station on the Santa Ana River at the upstream end of the Seven Oaks Dam basin in the unincorporated area of San Bernardino County.
Temporal Representation: The samples were collected on 11/1/94, 6/6/95, 8/14/95, 7/30/96, 8/20/97, 7/29/98
Environmental Conditions: The samples were taken during the dry weather.
QAPP Information: The data’s quality is deemed appropriate because it originated from an NPDES discharger in compliance with their monitoring and reporting program requirements.
QAPP Information Reference(s):
 
LOE ID: 28307
 
Pollutant: Iron
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 20
Number of Exceedances: 11
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Of the 20 samples collected, 11 exceeded the chronic criteria. However, there is no acute criteria for iron and the most appropraite criteria to assess wet weather discharges is the acuter criteria. This data was obtained from the self monitoring reports submitted by San Bernardino County Flood Control District Storm Water Program.
Data Reference: San Bernardino County Flood Control District data from storm water program.
 
Water Quality Objective/Criterion: Santa Ana Region's Basin Plan Narrative Objective: The concentrations of toxic pollutants in the water column, sediments, or biota shall not adversely affect beneficial uses.
Objective/Criterion Reference: Water Quality Control Plan-Santa Ana Region
 
Evaluation Guideline: US EPA National Ambient Water Quality Criteria Toxicity: Iron chronic criteria 4-day avg. 1,000 ug/l.
Guideline Reference: Compilation of Water Quality Goals
 
Spatial Representation: The 20 samples were taken at one station in the Santa Ana River at the upstream end of the Seven Oaks Dam basin in the unincorporated area of San Bernardino County.
Temporal Representation: The 20 samples were taken on 2/17/94, 3/17/94, 11/10/94, 1/23/95, 3/10/95, 12/12/95, 1/31/96, 2/19/96, 3/4/96, 3/13/96, 10/30/96, 11/21/96, 12/9/96, 11/26/97, 1/9/98, 2/3/98, 3/25/98, 12/26/03, 2/3/04, 2/19/04.
Environmental Conditions: The samples were taken as wet weather grabs.
QAPP Information: The data’s quality is deemed appropriate because it originated from an NPDES discharger in compliance with their monitoring and reporting program requirements.
QAPP Information Reference(s):
 
DECISION ID
16549
 
Pollutant: Mercury
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Weight of Evidence: This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.

Two lines of evidence are available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. None of 39 samples exceeded the National Ambient Recommended Criteria and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
RWQCB Board Decision / Staff Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
 
SWRCB Board Decision / Staff Recommendation:
 
USEPA Decision:
 
 
Lines of Evidence (LOEs) for Decision ID 16549
 
LOE ID: 28317
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Of the 6 samples taken, none were taking into account for the assessment because these were reported as non detect and the detection limit was above the chronic criteria. This data was obtained from the self monitoring reports submitted by San Bernardino County Flood Control District Storm Water Program.
Data Reference: San Bernardino County Flood Control District data from storm water program.
 
Water Quality Objective/Criterion: Santa Ana Region's Basin Plan Narrative Objective: The concentrations of toxic pollutants in the water column, sediments, or biota shall not adversely affect beneficial uses.
Objective/Criterion Reference: Water Quality Control Plan-Santa Ana Region
 
Evaluation Guideline: US EPA National Ambient Water Quality Criteria Toxicity: Mercury chronic criteria 0.77 ug/l
Guideline Reference: Compilation of Water Quality Goals
 
Spatial Representation: The samples were taken at one station on the Santa Ana River at the upstream end of the Seven Oaks Dam basin in the unincorporated area of San Bernardino County.
Temporal Representation: The samples were collected on 11/1/94, 6/6/95, 8/14/95, 7/30/96, 8/20/97, 7/29/98
Environmental Conditions: The samples were taken during the dry weather.
QAPP Information: The data’s quality is deemed appropriate because it originated from an NPDES discharger in compliance with their monitoring and reporting program requirements.
QAPP Information Reference(s):
 
LOE ID: 28315
 
Pollutant: Mercury
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 39
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Of the 39 samples collected none exceeded the CTR CTR acute criteria listed. This data was obtained from the self monitoring reports submitted by San Bernardino County Flood Control District Storm Water Program.
Data Reference: San Bernardino County Flood Control District data from storm water program.
 
Water Quality Objective/Criterion: Santa Ana Region's Basin Plan Narrative Objective: The concentrations of toxic pollutants in the water column, sediments, or biota shall not adversely affect beneficial uses.
Objective/Criterion Reference: Water Quality Control Plan-Santa Ana Region
 
Evaluation Guideline: US EPA National Ambient Water Quality Criteria Toxicity: Mercury acute criteria 1.4 ug/l.
Guideline Reference: Compilation of Water Quality Goals
 
Spatial Representation: The 24 samples were collected at one station in the Santa Ana River at the upstream end of the Seven Oaks Dam basin in the unincorporated area of San Bernardino County.
Temporal Representation: The 24 samples were collected monthly starting with 2/17/94 through 2/19/2004
Environmental Conditions: These samples were taken as wet weather grabs.
QAPP Information: The data’s quality is deemed appropriate because it originated from an NPDES discharger in compliance with their monitoring and reporting program requirements.
QAPP Information Reference(s):
 
DECISION ID
16548
 
Pollutant: Selenium
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 (2) lines of evidence are available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. None of twenty-five (25) samples exceeded the National Toxics Rule and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
RWQCB Board Decision / Staff Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
 
SWRCB Board Decision / Staff Recommendation:
 
USEPA Decision:
 
 
Lines of Evidence (LOEs) for Decision ID 16548
 
LOE ID: 28310
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 19
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Of the 19 samples taken, none exceeded the standards/guidelines listed above. This data was obtained from the self monitoring reports submitted by San Bernardino County Flood Control District Storm Water Program.
Data Reference: San Bernardino County Flood Control District data from storm water program.
 
Water Quality Objective/Criterion: Santa Ana Region's Basin Plan Narrative Objective: The concentrations of toxic pollutants in the water column, sediments, or biota shall not adversely affect beneficial uses.
Objective/Criterion Reference: Water Quality Control Plan-Santa Ana Region
 
Evaluation Guideline: National Toxics Rule Aquatic Life: Selenium 4-day avg. 5 ug/l and 1-hr avg. 20 ug/l.
Guideline Reference: Compilation of Water Quality Goals
 
Spatial Representation: The samples were taken at one station on the Santa Ana River at the upstream end of the Seven Oaks Dam basin in the unincorporated area of San Bernardino County.
Temporal Representation: The samples were taken on the following dates: 2/17/94, 3/17/94, 11/10/94, 1/23/95, 3/10/95, 12/12/95, 1/31/96, 2/19/96, 3/4/96, 3/13/96, 10/30/96, 11/21/96, 12/9/96, 11/26/97, 1/9/98, 2/3/98, 3/25/98, 12/26/03, 2/3/04, 2/19/04.
Environmental Conditions: The samples were taken as grabs during the wet weather.
QAPP Information: The data’s quality is deemed appropriate because it originated from an NPDES discharger in compliance with their monitoring and reporting program requirements.
QAPP Information Reference(s):
 
LOE ID: 28311
 
Pollutant: Selenium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 6
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Of the 6 samples taken, none exceeded the standards/guidelines listed above. This data was obtained from the self monitoring reports submitted by San Bernardino County Flood Control District Storm Water Program.
Data Reference: San Bernardino County Flood Control District data from storm water program.
 
Water Quality Objective/Criterion: Santa Ana Region's Basin Plan Narrative Objective: The concentrations of toxic pollutants in the water column, sediments, or biota shall not adversely affect beneficial uses.
Objective/Criterion Reference: Water Quality Control Plan-Santa Ana Region
 
Evaluation Guideline: National Toxics Rule Aquatic Life: Selenium 4-day avg. 5 ug/l and 1-hr avg. 20 ug/l.
Guideline Reference: Compilation of Water Quality Goals
 
Spatial Representation: The samples were taken at one station on the Santa Ana River at the upstream end of the Seven Oaks Dam basin in the unincorporated area of San Bernardino County.
Temporal Representation: The samples were collected on 11/1/94, 6/6/95, 8/14/95, 7/30/96, 8/20/97, 7/29/98
Environmental Conditions: The samples were taken during the dry weather.
QAPP Information: The data’s quality is deemed appropriate because it originated from an NPDES discharger in compliance with their monitoring and reporting program requirements.
QAPP Information Reference(s):
 
DECISION ID
16550
 
Pollutant: Silver
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Weight of Evidence: This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status.

Two lines of evidence are available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. None of the four samples exceeded the CTR acute criteria and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
RWQCB Board Decision / Staff Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
 
SWRCB Board Decision / Staff Recommendation:
 
USEPA Decision:
 
 
Lines of Evidence (LOEs) for Decision ID 16550
 
LOE ID: 28308
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 1
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Of the 6 samples only on was considered for the assessment because the rest of the samples were reported as non detect and the detection limit was higher than the criteria. This data was obtained from the self monitoring reports submitted by San Bernardino County Flood Control District Storm Water Program.
Data Reference: San Bernardino County Flood Control District data from storm water program.
 
Water Quality Objective/Criterion: Santa Ana Region's Basin Plan Narrative Objective: The concentrations of toxic pollutants in the water column, sediments, or biota shall not adversely affect beneficial uses.
Objective/Criterion Reference: Water Quality Control Plan-Santa Ana Region
 
Evaluation Guideline: California Toxics Rule Aquatic Life acute criteria varies according to hardness and ranged from
Guideline Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Spatial Representation: The samples were collected at one station in the Santa Ana River at the upstream end of the Seven Oaks Dam basin in the unincorporated area of San Bernardino County.
Temporal Representation: The 6 samples were taken on 11/1/94, 6/6/95, 8/14/95, 7/30/96, 8/20/97, 7/29/98.
Environmental Conditions: The samples were taken during the dry weather.
QAPP Information: The data’s quality is deemed appropriate because it originated from an NPDES discharger in compliance with their monitoring and reporting program requirements.
QAPP Information Reference(s):
 
LOE ID: 28309
 
Pollutant: Silver
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 4
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Of the 20 samples collected, only 4 were used in the assessment because the other 16 were reported as non detect and the detection limit was above the criteria. Of the remaining 4 sampels none exceeded the CTR acute criteria. This data was obtained from the self monitoring reports submitted by San Bernardino County Flood Control District Storm Water Program.
Data Reference: San Bernardino County Flood Control District data from storm water program.
 
Water Quality Objective/Criterion: Santa Ana Region's Basin Plan Narrative Objective: The concentrations of toxic pollutants in the water column, sediments, or biota shall not adversely affect beneficial uses.
Objective/Criterion Reference: Water Quality Control Plan-Santa Ana Region
 
Evaluation Guideline: California Toxics Rule Aquatic Life (this criteria varies according to hardness as follows): 2/17/94: 6.63 ug/l, 3/1/94: 35.53 ug/l, 11/10/94: 8.82 ug/l, 1/23/95: 2.59 ug/l, 3/10/95: 2.42 ug/l, 12/12/95: 2.82 ug/l, 1/31/96: 7.24 ug/l, 2/19/96: 30.01 ug/l, 3/4/96: 2.82 ug/l, 3/13/96: 2.59 ug/l, 10/30/96: 3.32 ug/l, 11/21/96: 3.85 ug/l, 12/9/96: 3.72 ug/l, 11/26/97: 42.17 ug/l, 1/9/98: 4.78 ug/l, 2/3/98: 3.72 ug/l, 3/25/98: 2.59 ug/l, 12/26/03: 3.78 ug/l, 2/3/04: 3.32 ug/l, 2/19/04: 3.32 ug/l.
Guideline Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Spatial Representation: The 20 samples were collected at one station in the Santa Ana River at the upstream end of the Seven Oaks Dam basin in the unincorporated area of San Bernardino County.
Temporal Representation: The 20 samples were taken on 2/17/94, 3/17/94, 11/10/94, 1/23/95, 3/10/95, 12/12/95, 1/31/96, 2/19/96, 3/4/96, 3/13/96, 10/30/96, 11/21/96, 12/9/96, 11/26/97, 1/9/98, 2/3/98, 3/25/98, 12/26/03, 2/3/04, 2/19/04.
Environmental Conditions: The samples were taken as wet weather grabs.
QAPP Information: The data’s quality is deemed appropriate because it originated from an NPDES discharger in compliance with their monitoring and reporting program requirements.
QAPP Information Reference(s):
 
DECISION ID
16547
 
Pollutant: pH
Final Listing Decision: Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: New Decision
Revision Status Revised
Impairment from Pollutant or Pollution: Pollutant
 
Weight of Evidence: This pollutant is being considered for placement on the section 303(d) list under section 3.2 of the Listing Policy. Under section 3.2 a single line of evidence is necessary to assess listing status.

One line of evidence is available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. None of three samples exceeded the Basin Plan Objective and this does not exceed the allowable frequency listed in Table 3.2 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
RWQCB Board Decision / Staff Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.
 
SWRCB Board Decision / Staff Recommendation:
 
USEPA Decision:
 
 
Lines of Evidence (LOEs) for Decision ID 16547
 
LOE ID: 28314
 
Pollutant: pH
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 3
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Of the 3 samples taken, none exceeded the standards/guidelines listed above. This data was obtained from the self monitoring reports submitted by San Bernardino County Flood Control District Storm Water Program.
Data Reference: San Bernardino County Flood Control District data from storm water program.
 
Water Quality Objective/Criterion: Santa Ana Region's Basin Plan Numeric Objective: The pH of inland surface waters shall not be raised above 8.5 or depressed below 6.5 as a result of controllable water quality factors.
Objective/Criterion Reference: Water Quality Control Plan-Santa Ana Region
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: The samples were taken at one station on the Santa Ana River at the upstream end of the Seven Oaks Dam basin in the unincorporated area of San Bernardino County.
Temporal Representation: The samples were taken on the following dates: 12/26/03, 2/3/04, 2/19/04.
Environmental Conditions: The samples were taken as grabs during the wet weather.
QAPP Information: The data’s quality is deemed appropriate because it originated from an NPDES discharger in compliance with their monitoring and reporting program requirements.
QAPP Information Reference(s):
 
DECISION ID
16546
 
Pollutant: Cadmium
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.

Two lines of evidence are available in the administrative record to assess this pollutant. Two of the samples exceed the water quality objective.

Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category.

This conclusion is based on the staff findings that:
1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy.
2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy.
3. Two of eight samples exceeded the California Toxics Rule and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy.
4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
 
RWQCB Board Decision / Staff Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should 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 16546
 
LOE ID: 28247
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 8
Number of Exceedances: 2
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Of the 8 samples collected, 2 exceeded the California Toxics Rule. This data was obtained from the self monitoring reports submitted by San Bernardino County Flood Control District Storm Water Program.
Data Reference: San Bernardino County Flood Control District data from storm water program.
 
Water Quality Objective/Criterion: Santa Ana Region's Basin Plan Narrative Objective: The concentrations of toxic pollutants in the water column, sediments, or biota shall not adversely affect beneficial uses.
Objective/Criterion Reference: Water Quality Control Plan-Santa Ana Region
 
Evaluation Guideline: California Toxics Rule Aquatic Life this criteria varies according to hardness and ranged from 1 to 7 ug/l
Guideline Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Spatial Representation: The samples were collected at one station in the Santa Ana River at the upstream end of the Seven Oaks Dam basin in the unincorporated area of San Bernardino County.
Temporal Representation: The 23 samples were taken on 2monthly starting on 2/17/94 through 2/19/2004
Environmental Conditions: The samples were taken as wet weather grab samples.
QAPP Information: The data’s quality is deemed appropriate because it originated from an NPDES discharger in compliance with their monitoring and reporting program requirements.
QAPP Information Reference(s):
 
LOE ID: 28300
 
Pollutant: Cadmium
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: Total
 
Beneficial Use: Cold Freshwater Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality: Of the 6 samples collected, none were used in the assessment because these were reported as non detect and the detection limit was above the criteria. This data was obtained from the self monitoring reports submitted by San Bernardino County Flood Control District Storm Water Program.
Data Reference: San Bernardino County Flood Control District data from storm water program.
 
Water Quality Objective/Criterion: Santa Ana Region's Basin Plan Narrative Objective: The concentrations of toxic pollutants in the water column, sediments, or biota shall not adversely affect beneficial uses.
Objective/Criterion Reference: Water Quality Control Plan-Santa Ana Region
 
Evaluation Guideline: California Toxics Rule Aquatic Life varies with hardness and it ranged from 0.2 to 0.5 ug/l
Guideline Reference: Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency
 
Spatial Representation: The samples were collected at one station in the Santa Ana River at the upstream end of the Seven Oaks Dam basin in the unincorporated area of San Bernardino County.
Temporal Representation: The 6 samples were taken on 11/194, 6/6/95, 8/14/95, 7/30/96, 8/20/97, 7/29/98.
Environmental Conditions: The samples were collected during the wet season.
QAPP Information: The data’s quality is deemed appropriate because it originated from an NPDES discharger in compliance with their monitoring and reporting program requirements.
QAPP Information Reference(s):