Final California 2010 Integrated Report (303(d) List/305(b) Report)

Supporting Information

Regional Board 8 - Santa Ana Region

Water Body Name:	Santa Ana River Reach 6
Water Body ID:	CAR8015700020080921214849
Water Body Type:	River & Stream


DECISION ID	16545	Region 8
Santa Ana River Reach 6

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

Regional Board Conclusion:	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.

Regional Board Decision 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.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	After review of the available data and information, SWRCB 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 exceeded.

USEPA Action (if applicable):

Line of Evidence (LOE) for Decision ID 16545, Arsenic	Region 8
Santa Ana River Reach 6

LOE ID:

28298

Pollutant:

Arsenic

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

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

SWAMP Data:

Non-SWAMP

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 for the Santa Ana River Basin

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

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 datas 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	Region 8
Santa Ana River Reach 6

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

Regional Board Conclusion:	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.

Regional Board Decision 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.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	After review of the available data and information, SWRCB 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.

USEPA Action (if applicable):

Line of Evidence (LOE) for Decision ID 16552, Iron	Region 8
Santa Ana River Reach 6

LOE ID:

28307

Pollutant:

Iron

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

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

SWAMP Data:

Non-SWAMP

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 for the Santa Ana River Basin

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 datas quality is deemed appropriate because it originated from an NPDES discharger in compliance with their monitoring and reporting program requirements.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 16552, Iron	Region 8
Santa Ana River Reach 6

LOE ID:

28305

Pollutant:

Iron

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

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

SWAMP Data:

Non-SWAMP

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 for the Santa Ana River Basin

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; Establishment of Numeric Criteria for Priority Toxic Pollutants; States' Compliances

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 datas 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	Region 8
Santa Ana River Reach 6

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

Regional Board Conclusion:	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.

Regional Board Decision 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.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards for the pollutant are not exceeded.

USEPA Action (if applicable):

Line of Evidence (LOE) for Decision ID 16549, Mercury	Region 8
Santa Ana River Reach 6

LOE ID:

28317

Pollutant:

Mercury

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

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

SWAMP Data:

Non-SWAMP

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 for the Santa Ana River Basin

Evaluation Guideline:

US EPA National Ambient Water Quality Criteria Toxicity: Mercury chronic criteria 0.77 ug/l

Guideline Reference:

Compilation of Water Quality Goals

Water Quality Standards; Establishment of Numeric Criteria for Priority Toxic Pollutants; States' Compliances

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 datas quality is deemed appropriate because it originated from an NPDES discharger in compliance with their monitoring and reporting program requirements.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 16549, Mercury	Region 8
Santa Ana River Reach 6

LOE ID:

28315

Pollutant:

Mercury

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

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

SWAMP Data:

Non-SWAMP

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 for the Santa Ana River Basin

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 datas 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	Region 8
Santa Ana River Reach 6

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

Regional Board Conclusion:	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.

Regional Board Decision 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.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards for the pollutant are not exceeded.

USEPA Action (if applicable):

Line of Evidence (LOE) for Decision ID 16548, Selenium	Region 8
Santa Ana River Reach 6

LOE ID:

28311

Pollutant:

Selenium

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

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

SWAMP Data:

Non-SWAMP

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 for the Santa Ana River Basin

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

Water Quality Standards; Establishment of Numeric Criteria for Priority Toxic Pollutants; States' Compliances

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 datas quality is deemed appropriate because it originated from an NPDES discharger in compliance with their monitoring and reporting program requirements.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 16548, Selenium	Region 8
Santa Ana River Reach 6

LOE ID:

28310

Pollutant:

Selenium

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

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

SWAMP Data:

Non-SWAMP

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 for the Santa Ana River Basin

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:

Environmental Conditions:

The samples were taken as grabs during the wet weather.

QAPP Information:

The datas 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	Region 8
Santa Ana River Reach 6

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

Regional Board Conclusion:	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.

Regional Board Decision 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.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards for the pollutant are not exceeded.

USEPA Action (if applicable):

Line of Evidence (LOE) for Decision ID 16550, Silver	Region 8
Santa Ana River Reach 6

LOE ID:

28309

Pollutant:

Silver

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

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

SWAMP Data:

Non-SWAMP

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 for the Santa Ana River Basin

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:

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:

Environmental Conditions:

The samples were taken as wet weather grabs.

QAPP Information:

The datas quality is deemed appropriate because it originated from an NPDES discharger in compliance with their monitoring and reporting program requirements.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 16550, Silver	Region 8
Santa Ana River Reach 6

LOE ID:

28308

Pollutant:

Silver

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

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

SWAMP Data:

Non-SWAMP

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 for the Santa Ana River Basin

Evaluation Guideline:

California Toxics Rule Aquatic Life acute criteria varies according to hardness and ranged from

Guideline Reference:

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 datas 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	Region 8
Santa Ana River Reach 6

Pollutant:	Zinc
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	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.

Regional Board Decision 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.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	Copper and Lead has been removed from this assessment and are assessed separately. After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards for the pollutant are not exceeded.

USEPA Action (if applicable):

Line of Evidence (LOE) for Decision ID 16551, Zinc	Region 8
Santa Ana River Reach 6

LOE ID:

28304

Pollutant:

Copper | Lead | Zinc

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

San Bernardino County Flood Control District data from storm water program

SWAMP Data:

Non-SWAMP

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 for the Santa Ana River Basin

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:

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):

Line of Evidence (LOE) for Decision ID 16551, Zinc	Region 8
Santa Ana River Reach 6

LOE ID:

28303

Pollutant:

Copper | Lead | Zinc

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

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

SWAMP Data:

Non-SWAMP

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 for the Santa Ana River Basin

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:

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	16547	Region 8
Santa Ana River Reach 6

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

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 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.

Regional Board Decision 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.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	After review of the available data and information, SWRCB 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.

USEPA Action (if applicable):

Line of Evidence (LOE) for Decision ID 16547, pH	Region 8
Santa Ana River Reach 6

LOE ID:

28314

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

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

SWAMP Data:

Non-SWAMP

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 for the Santa Ana River Basin

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 datas 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	Region 8
Santa Ana River Reach 6

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

Regional Board Conclusion:	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. State Board Staff Review 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. Default CTR translators were used to evaluate total metals data with dissolved metals criteria since the translators developed for the Use Attainability Analysis in the 1990's were superseded in 2000 by the federal promulgation of the California Toxics Rule. Following the provisions of the State Policy for Implementation of Toxics Standards for Inland Surface Waters, Enclosed Bays, and Estuaries of California of 2005, USEPA conversion factors (translators) are to be used to convert total metals criteria to dissolved metals criteria. As a result, LOEs 28300 and 28247 have been replaced during State Board review. One line of evidence is available in the administrative record to assess this pollutant with the CTR chronic criteria. Four of the 26 wet season samples exceed the criteria. No usable data for dry weather was available. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification in favor of placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Four of the 26 wet season samples exceed the California Toxics Rule chronic criteria 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 not met.

Regional Board Decision Recommendation:	The CTR metals criteria, which are the applicable basis for impairment assessment, are expressed in the dissolved form. However, the metals data available for the Santa Ana River and its tributaries are in the total recoverable form. To convert the data to the dissolved form for comparison to the CTR criteria, total-dissolved translators developed for the Santa Ana River and its tributaries as part of use attainability analyses conducted in the early 1990s were employed (for cadmium and copper, the translator is 2.6; for lead, the translator is 6.1). These translators have been employed since their development in the early 1990s, together with the CTR metals criteria, to develop total recoverable effluent limitations for these metals in NPDES permits issued to POTWs that discharge to the River and its tributaries. The River/tributaries are effluent dominated: most of the flow in this system is comprised of treated municipal wastewater. It is thus reasonable and appropriate to apply the established translators to the conversion of ambient total recoverable metals data to dissolved values for comparison to the CTR criteria. 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.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	State Water Board staff, after review, concurs with RWQCB Decision to place this water body-pollutant combination on the 303(d) List, however, staff does not concur with all the reasons contained in the Regional Board Weight of Evidence and Recommendation. After review of the available data and information, SWRCB 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.

USEPA Action (if applicable):	USEPA approved the listing of this water body as a water quality limited segment requiring a TMDL for this pollutant.

Line of Evidence (LOE) for Decision ID 16546, Cadmium	Region 8
Santa Ana River Reach 6

LOE ID:

31377

Pollutant:

Cadmium

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Forty-five samples were collected for this data set. However, only 26 had results above the criterion or non-detect results with sample detection limits below the criterion.

Four of the 26 samples exceeded the CTR chronic criterion. Total metals data were converted to compare with dissolved metals criteria.

This line of evidence replaces LOEs 28247 and 28300. These LOEs have been replaced as a result of the State Board review and revision of the Regional Board assessment of these monitoring data.

Data Reference:

San Bernardino County Flood Control District data from storm water program

SWAMP Data:

Non-SWAMP

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 for the Santa Ana River Basin

Evaluation Guideline:

California Toxics Rule Criterion Continuous Concentration (CCC) for freshwater aquatic life for cadmium. Numeric criterion varies with hardness.

Guideline Reference:

Spatial Representation:

Samples were collected at Site 10: Santa Ana River - 6 miles upstream of 7 Oaks Dam.

Temporal Representation:

Samples were collected during wet weather conditions from 1994 to 2006.

Environmental Conditions:

QAPP Information:

Data originated from an NPDES discharger in compliance with their monitoring and reporting program requirements.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 16546, Cadmium	Region 8
Santa Ana River Reach 6

LOE ID:

28300

Pollutant:

Cadmium

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

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

SWAMP Data:

Non-SWAMP

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 for the Santa Ana River Basin

Evaluation Guideline:

California Toxics Rule Aquatic Life varies with hardness and it ranged from 0.2 to 0.5 ug/l

Guideline Reference:

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 datas quality is deemed appropriate because it originated from an NPDES discharger in compliance with their monitoring and reporting program requirements.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 16546, Cadmium	Region 8
Santa Ana River Reach 6

LOE ID:

28247

Pollutant:

Cadmium

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

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

SWAMP Data:

Non-SWAMP

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 for the Santa Ana River Basin

Evaluation Guideline:

California Toxics Rule Aquatic Life this criteria varies according to hardness and ranged from 1 to 7 ug/l

Guideline Reference:

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 datas 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	17974	Region 8
Santa Ana River Reach 6

Pollutant:	Copper
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

Regional Board Conclusion:	USEPA Final Approval Decision Details: The November 12, 2010 USEPA partial approval letter and the October 11, 2011 final approval letter both from Alexis Strauss, USEPA Region 9, to Tom Howard, SWRCB, concluded the following: USEPA has added Santa Ana River Reach 6 to the list of water quality limited segments requiring a TMDL for copper. USEPA determined that the metals criteria established in the California Toxics Rule (CTR) apply to this segment and that using the 40 CFR 131.38(b) conversion factors for lead and copper is appropriate in this action. The numeric criteria in 40 CFR 131.38 applicable to lead and copper are themselves products of the conversion factors. Before developing the criteria that EPA is now assessing, the agency established, pursuant to Clean Water Act section 304, Guidance Values for copper and lead expressed in the total recoverable fraction. Using those "total recoverable" Guidance Values, EPA then calculated the current "dissolved" criteria for those metals by applying the conversion factors in 40 CFR 131.38(b). See, 40 CFR 131.38(b)(1), footnote m. USEPA concludes that the same factors that EPA used to convert "total recoverable" to "dissolved" values can be appropriately used to convert the current "total recoverable" data to a "dissolved" equivalent. USEPA evaluated data using the criteria and default conversion factors established in the CTR, and found impairment of this water body by copper. Of the 8 samples, 5 exceeded the CTR criteria. An additional 28 samples were collected with detection limits that were inadequate to assess the standard and may represent additional exceedances. Observed exceedances are greater than the 3% exceedance threshold for toxicants as expressed in Table 3.1 of the State Listing Policy. The data included sampling results from both wet and dry periods. EPA notes that the subject criteria apply regardless of season, and EPA concludes that the sampling data are sufficiently representative. For clarification, the Regional and State Water Board decision recommendations made prior to USEPA's final decision are presented below: Note: All lines of evidence (LOEs) previously made by the Regional Boards have NOT been revised. USEPA's worksheet has been included in the administrative record as reference number 3646, titled "USEPA Region 9 data summary for addition of copper and lead to California 2010 303(d) list for Santa Ana River Reach 6".

Regional Board Decision Recommendation:	Regional Water Board Decision Recommendation (prior to State Water Board approval): The original Regional Board decision for copper was part of a Do Not List -multiple pollutant decision which stated: 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.

State Board Review of Regional Board Conclusion and Recommendation:	For clarification, the Regional and State Water Board decision recommendations made prior to USEPA's final decision are presented below: Note: All lines of evidence (LOEs) previously made by the Regional Boards have NOT been revised. USEPA's worksheet has been included in the administrative record as reference number 3646, titled "USEPA Region 9 data summary for addition of copper and lead to California 2010 303(d) list for Santa Ana River Reach 6".

State Board Decision Recommendation:	State Water Board Decision Recommendation (prior to USEPA approval): The original Regional Board decision for copper was part of a Do Not List -multiple pollutant decision. As a result of the State Water Board review, copper has been removed from the assessment in Decision 16551 and is being assessed in this decision separately. The April 19, 2010 State Water Board staff report for the 2010 Integrated Report recommended to place this water body on the 303(d) list for copper based on the re-evaluation of the data using different data translators: In the original Regional Board assessment, staff translated the total recoverable copper data to the dissolved form for comparison to the California Toxics Rule (CTR) criteria using total-dissolved translators developed for the Santa Ana River and its tributaries as part of use attainability analyses conducted in the early 1990's. For cadmium and copper, the translator is 2.6; for lead, the translator is 6.1. State Water Board staff re-evaluated the copper data using a default CTR translator to translate the data from total recoverable to dissolved copper. This is because the translators developed for the Use Attainability Analysis in the 1990's were superseded in 2000 by the federal promulgation of the California Toxics Rule. In addition, the 1990 translator was approved by USEPA for use with effluent data in NPDES permits only. As a result of the re-evaluation, there are 2 new LOEs that replace the original group of LOEs. The original LOEs were: 28303 and 28304. Two lines of evidence are available in the administrative record to assess this pollutant. Eleven of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification in favor of placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Eleven of 21 samples exceed the California Toxics Rule chronic criteria 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 not met. At the June 15, 2010 State Water Board meeting for approval of the 2010 Integrated Report, the State Water Board directed staff to reevaluate the listing recommendation for this water body-pollutant combination. Based on this reevaluation, State Water Board staff continued to recommend to place this water body on the 303(d) list for copper. At the August 4, 2010 State Water Board's follow-up Board meeting for approval of the 2010 Integrated Report, the State Water Board did not approve the State Water Board staff recommendation and decided to not place this water body on the 303(d) list for copper. The State Water Board recommends that this 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 being exceeded.

USEPA Action (if applicable):	USEPA identified this water body as a water quality limited segment requiring a TMDL for this pollutant.

Line of Evidence (LOE) for Decision ID 17974, Copper	Region 8
Santa Ana River Reach 6

LOE ID:

28303

Pollutant:

Copper | Lead | Zinc

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

San Bernardino County Flood Control District data from storm water program

SWAMP Data:

Non-SWAMP

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 for the Santa Ana River Basin

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:

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):

Line of Evidence (LOE) for Decision ID 17974, Copper	Region 8
Santa Ana River Reach 6

LOE ID:

28304

Pollutant:

Copper | Lead | Zinc

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

San Bernardino County Flood Control District data from storm water program

SWAMP Data:

Non-SWAMP

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 for the Santa Ana River Basin

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 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):

Line of Evidence (LOE) for Decision ID 17974, Copper	Region 8
Santa Ana River Reach 6

LOE ID:

31379

Pollutant:

Copper

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Forty-six samples were collected for this data set. However, only 19 had results above the criterion or non-detect results with sample detection limits below the criterion.

Eleven of the 19 samples exceeded the CTR chronic criterion. Total metals data were converted to compare with dissolved metals criteria.

This line of evidence is a result of re-evaluation of data using USEPA conversion factors (translators) to convert dissolved metals criteria to total metals criteria. There are 2 new LOEs that replace the original group of LOEs. The original LOEs were: 28303 and 28304.

Data Reference:

San Bernardino County Flood Control District data from storm water program

SWAMP Data:

Non-SWAMP

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 for the Santa Ana River Basin

Evaluation Guideline:

California Toxics Rule Criterion Continuous Concentration (CCC) for freshwater aquatic life for copper. Numeric criterion varies with hardness.

Guideline Reference:

Spatial Representation:

Samples were collected at Site 10: Santa Ana River - 6 miles upstream of 7 Oaks Dam.

Temporal Representation:

Samples were collected during wet weather conditions from 1994 to 2006.

Environmental Conditions:

QAPP Information:

Data originated from an NPDES discharger in compliance with their monitoring and reporting program requirements.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 17974, Copper	Region 8
Santa Ana River Reach 6

LOE ID:

31378

Pollutant:

Copper

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Six samples were collected for this data set. However, only 2 had results above the criterion or non-detect results with sample detection limits below the criterion.

None of the 2 samples exceeded the CTR chronic criterion. Total metals data were converted to compare with dissolved metals criteria.

This line of evidence is a result of re-evaluation of data using USEPA conversion factors (translators) to convert dissolved metals criteria to total metals criteria. There are 2 new LOEs that replace the original group of LOEs. The original LOEs were: 28303 and 28304.

Data Reference:

San Bernardino County Flood Control District data from storm water program

SWAMP Data:

Non-SWAMP

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 for the Santa Ana River Basin

Evaluation Guideline:

California Toxics Rule Criterion Continuous Concentration (CCC) for freshwater aquatic life for copper. Numeric criterion varies with hardness.

Guideline Reference:

Spatial Representation:

Samples were collected at Site 10: Santa Ana River - 6 miles upstream of 7 Oaks Dam.

Temporal Representation:

Samples were collected during dry weather conditions (mid-summer) from 1994 to 1998.

Environmental Conditions:

During dry weather season, storm drain systems do not experience continuous flows.

QAPP Information:

Data originated from an NPDES discharger in compliance with their monitoring and reporting program requirements.

QAPP Information Reference(s):


DECISION ID	17975	Region 8
Santa Ana River Reach 6

Pollutant:	Lead
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

Regional Board Conclusion:	USEPA Final Approval Decision Details: The November 12, 2010 USEPA partial approval letter and the October 11, 2011 final approval letter both from Alexis Strauss, USEPA Region 9, to Tom Howard, SWRCB, concluded the following: USEPA has added Santa Ana River Reach 6 to the list of water quality limited segments requiring a TMDL for lead. USEPA determined that the metals criteria established in the California Toxics Rule (CTR) apply to this segment and that using the 40 CFR 131.38(b) conversion factors for lead and copper is appropriate in this action. The numeric criteria in 40 CFR 131.38 applicable to lead and copper are themselves products of the conversion factors. Before developing the criteria that EPA is now assessing, the agency established, pursuant to Clean Water Act section 304, Guidance Values for copper and lead expressed in the total recoverable fraction. Using those "total recoverable" Guidance Values, EPA then calculated the current "dissolved" criteria for those metals by applying the conversion factors in 40 CFR 131.38(b). See, 40 CFR 131.38(b)(1), footnote m. USEPA concludes that the same factors that EPA used to convert "total recoverable" to "dissolved" values can be appropriately used to convert the current "total recoverable" data to a "dissolved" equivalent. USEPA evaluated data using the criteria and default conversion factors established in the CTR, and found impairment of this water body by lead. Of the 3 samples, 3 exceeded the CTR criteria. An additional 33 samples were collected with detection limits that were inadequate to assess the standard and may represent additional exceedances. Observed exceedances are greater than the 3% exceedance threshold for toxicants as expressed in Table 3.1 of the State Listing Policy. The data included sampling results from both wet and dry periods. EPA notes that the subject criteria apply regardless of season, and EPA concludes that the sampling data are sufficiently representative. For clarification, the Regional and State Water Board decision recommendations made prior to USEPA's final decision are presented below: Note: All lines of evidence (LOEs) previously made by the Regional Boards have NOT been revised. USEPA's worksheet has been included in the administrative record as reference number 3646, titled "USEPA Region 9 data summary for addition of copper and lead to California 2010 303(d) list for Santa Ana River Reach 6".

Regional Board Decision Recommendation:	Regional Water Board Decision Recommendation (prior to State Water Board approval): The original Regional Board decision for lead was part of a Do Not List -multiple pollutant decision which stated: 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.

State Board Review of Regional Board Conclusion and Recommendation:	For clarification, the Regional and State Water Board decision recommendations made prior to USEPA's final decision are presented below: Note: All lines of evidence (LOEs) previously made by the Regional Boards have NOT been revised. USEPA's worksheet has been included in the administrative record as reference number 3646, titled "USEPA Region 9 data summary for addition of copper and lead to California 2010 303(d) list for Santa Ana River Reach 6".

State Board Decision Recommendation:	State Water Board Decision Recommendation (prior to USEPA approval): The original Regional Board decision for copper was part of a Do Not List -multiple pollutant decision. As a result of the State Water Board review, lead has been removed from the assessment in Decision 16551 and is being assessed in this decision separately. The April 19, 2010 State Water Board staff report for the 2010 Integrated Report recommended to place this water body on the 303(d) list for lead based on the re-evaluation of the data using different data translators: In the original Regional Board assessment, staff translated the total recoverable lead data to the dissolved form for comparison to the California Toxics Rule (CTR) criteria using total-dissolved translators developed for the Santa Ana River and its tributaries as part of use attainability analyses conducted in the early 1990's. For cadmium and copper, the translator is 2.6; for lead, the translator is 6.1. State Water Board staff re-evaluated the lead data using a default CTR translator to translate the data from total recoverable to dissolved lead. This is because the translators developed for the Use Attainability Analysis in the 1990's were superseded in 2000 by the federal promulgation of the California Toxics Rule. In addition, the 1990 translator was approved by USEPA for use with effluent data in NPDES permits only. As a result of the re-evaluation, there are 2 new LOEs that replace the original group of LOEs. The original LOEs were: 28303 and 28304. Two lines of evidence are available in the administrative record to assess this pollutant. Five of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification in favor of placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Five of 6 samples exceed the California Toxics Rule chronic criteria 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 not met. At the June 15, 2010 State Water Board meeting for approval of the 2010 Integrated Report, the State Water Board directed staff to reevaluate the listing recommendation for this water body-pollutant combination. Based on this reevaluation, State Water Board staff continued to recommend to place this water body on the 303(d) list for lead. At the August 4, 2010 State Water Board's follow-up Board meeting for approval of the 2010 Integrated Report, the State Water Board did not approve the State Water Board staff recommendation and instead recommended to not place this water body on the 303(d) list for lead. The State Water Board recommends that this 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 being exceeded.

USEPA Action (if applicable):	USEPA identified this water body as a water quality limited segment requiring a TMDL for this pollutant.

Line of Evidence (LOE) for Decision ID 17975, Lead	Region 8
Santa Ana River Reach 6

LOE ID:

31381

Pollutant:

Lead

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Forty-six samples were collected for this data set. However, only 5 samples have results above the criterion or non-detect results with sample detection limits below the criterion.

All 5 samples exceeded the CTR chronic criterion. Total metals data were converted to compare with dissolved metals criteria.

This line of evidence is a result of re-evaluation of data using USEPA conversion factors (translators) to convert dissolved metals criteria to total metals criteria. There are 2 new LOEs that replace the original group of LOEs. The original LOEs were: 28303 and 28304.

Data Reference:

San Bernardino County Flood Control District data from storm water program

SWAMP Data:

Non-SWAMP

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 for the Santa Ana River Basin

Evaluation Guideline:

California Toxics Rule Criterion Continuous Concentration (CCC) for freshwater aquatic life for lead. Numeric criterion varies with hardness.

Guideline Reference:

Spatial Representation:

Samples were collected at Site 10: Santa Ana River - 6 miles upstream of 7 Oaks Dam.

Temporal Representation:

Samples were collected during wet weather conditions from 1994 to 2006.

Environmental Conditions:

QAPP Information:

Data originated from an NPDES discharger in compliance with their monitoring and reporting program requirements.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 17975, Lead	Region 8
Santa Ana River Reach 6

LOE ID:

31380

Pollutant:

Lead

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Six samples were collected for this data set. However, only one sample had results above the criterion or non-detect results with sample detection limits below the criterion.

The one sample did not exceeded the CTR chronic criterion. Total metals data were converted to compare with dissolved metals criteria.

This line of evidence is a result of re-evaluation of data using USEPA conversion factors (translators) to convert dissolved metals criteria to total metals criteria. There are 2 new LOEs that replace the original group of LOEs. The original LOEs were: 28303 and 28304.

Data Reference:

San Bernardino County Flood Control District data from storm water program

SWAMP Data:

Non-SWAMP

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 for the Santa Ana River Basin

Evaluation Guideline:

California Toxics Rule Criterion Continuous Concentration (CCC) for freshwater aquatic life for lead. Numeric criterion varies with hardness.

Guideline Reference:

Spatial Representation:

Samples were collected at Site 10: Santa Ana River - 6 miles upstream of 7 Oaks Dam.

Temporal Representation:

Samples were collected during dry weather conditions (mid-summer) from 1994 to 1998.

Environmental Conditions:

During dry weather season, storm drain systems do not experience continuous flows.

QAPP Information:

Data originated from an NPDES discharger in compliance with their monitoring and reporting program requirements.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 17975, Lead	Region 8
Santa Ana River Reach 6

LOE ID:

28303

Pollutant:

Copper | Lead | Zinc

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

San Bernardino County Flood Control District data from storm water program

SWAMP Data:

Non-SWAMP

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 for the Santa Ana River Basin

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:

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):

Line of Evidence (LOE) for Decision ID 17975, Lead	Region 8
Santa Ana River Reach 6

LOE ID:

28304

Pollutant:

Copper | Lead | Zinc

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

San Bernardino County Flood Control District data from storm water program

SWAMP Data:

Non-SWAMP

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 for the Santa Ana River Basin

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 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):