Final California 2020 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	76485	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:	Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status	Original
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	There was no new data considered in the 2014 Listing Cycle, this previously made decision will carryover. The following description applies to an earlier Listing Cycle. 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:	This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current. The decision has not changed.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 76485, 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 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	100440	Region 8
Santa Ana River Reach 6

Pollutant:	Benthic Community Effects
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status	Original
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	Benthic Community Effects is being considered for placement on the CWA section 303(d) List under sections 3.9 and 3.1 of the Listing Policy. Under section 3.9, an additional line of evidence associating Benthic Community Effects with a water or sediment concentration of pollutant(s) is necessary to assess listing status. Six lines of evidence are available in the administrative record to assess this indicator. Zero of the 2 benthic macroinvertebrate samples exceed (fall below) the California Streams Condition Index (CSCI) threshold for likely altered biological condition. The water segment does have associated pollutant(s) samples that exceed water quality criteria. Based on the readily available data and information, the weight of evidence provides sufficient justification for not placing Benthic Community Effects in this water segment on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Pursuant to section 3.9 of the Listing Policy, the water segment does not exhibit significant degradation in biological populations and/or communities as compared to reference site(s) using the California Stream Condition Index. 4. Pursuant to section 3.9 of the Listing Policy, the water segment does have associated pollutant(s) samples that exceed water quality criteria. 5. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not being met. The California Stream Condition Index is a new scoring tool for bioassessment data that is applicable statewide, accounts for a much wider range of natural variability, and provides equivalent scoring thresholds in all regions of the state. The CSCI has been used in some assessments this reporting cycle and will be used in the future for water quality assessment purposes statewide over the regional indices of biologic integrity (IBIs). If CSCI scores have not been calculated for data and only IBI scores are available, IBI scores will still be used to interpret the data.

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. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.

State Board Review of Regional Board Conclusion and Recommendation:	The California Stream Condition Index is a new scoring tool for bioassessment data that is applicable statewide, accounts for a much wider range of natural variability, and provides equivalent scoring thresholds in all regions of the state. The CSCI has been used in some assessments this reporting cycle and will be used in the future for water quality assessment purposes statewide over the regional indices of biologic integrity (IBIs). If CSCI scores have not been calculated for data and only IBI scores are available, IBI scores will still be used to interpret the data.

State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 100440, Benthic Community Effects	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 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 100440, Benthic Community Effects	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 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 100440, Benthic Community Effects	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 100440, Benthic Community Effects	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 100440, Benthic Community Effects	Region 8
Santa Ana River Reach 6

LOE ID:

82371

Pollutant:

Benthic-Macroinvertebrate Bioassessments

LOE Subgroup:

Population/Community Degradation

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

Benthic macroinvertebrate surveys

Data Used to Assess Water Quality:

Three samples were collected from two different sites on the Santa Ana River, Reach 6 during 2007 to assess benthic macroinvertebrates. Sampling location 801SAR168 (SMCR8_168) had one sample and one replicate with CSCI scores of 0.99 and 1.1. To meet the temporal independence in Section 6.1.5.6 of the Listing Policy, the scores were averaged. The average CSCI score for this site is 1.0. This site is above the 0.79 threshold and therefore meets the water quality objective for the aquatic life beneficial use. Sampling location 801HNC203 (SMCR8_203) has a CSCI score of 1.0. This site is above the 0.79 threshold and therefore meets the water quality objective for the aquatic life beneficial use.

Data Reference:

Data for Various Pollutants in the Streams of Region 8, 2009.

Region 8 CSCI scores and data.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Inland surface water communities and populations, including vertebrate, invertebrate, and plant species, shall not be degraded as a result of the discharge of waste. Degradation is damage to an aquatic community or population with the result that balanced community no longer exists. 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 River Basin

Evaluation Guideline:

The California Stream Condition Index (CSCI) is a biological scoring tool that helps aquatic resource managers translate complex data about benthic macroinvertebrates found living in a stream into an overall measure of stream health. The CSCI score is calculated by comparing the expected condition with actual (observed) results (Rehn, A.C. et al., 2015). CSCI scores range from 0 (highly degraded) to greater than 1 (equivalent to reference). CSCI scoring of biological condition are as follows (per the scientific paper supporting the development of the CSCI scoring tool): greater than or equal to 0.92 = likely intact condition, 0.91 to 0.80 = possibly altered condition, 0.79 to 0.63 = likely altered condition, less than or equal to 0.62 = very likely altered condition. Sites with scores below 0.79 are considered to have exceeded the water quality objective for the aquatic life beneficial use.

Guideline Reference:

Bioassessment in complex environments: designing an index for consistent meaning in different settings

Spatial Representation:

The samples were collected from Santa Ana River station 801SAR168 (SMCR8_168) and station 801HNC203 (SMCR8_203).

Temporal Representation:

The samples were collected in May and June 2007 at stations 801HNC203 (SMCR8_203) and 801SAR168 (SMCR8_168).

Environmental Conditions:

QAPP Information:

Samples were collected for the RWB8's Probabilistic Stream Survey CY2007 following SWAMP protocols. Data is from Region 8 CSULB database and formatted in SWAMP format. Taxonomic data is good.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 100440, Benthic Community Effects	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):


DECISION ID	97239	Region 8
Santa Ana River Reach 6

Pollutant:	Chloride
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status	Original
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence are necessary to assess listing status. One (1) line of evidence is available in the administrative record to assess this pollutant. Zero (0) of the one sample exceed the OBJECTIVE. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero (0) of one sample exceeded the OBJECTIVE and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1. 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. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 97239, Chloride	Region 8
Santa Ana River Reach 6

LOE ID:

82372

Pollutant:

Chloride

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total Dissolved

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

The sample collected did not exceed the site-specific objective.

Data Reference:

Data for Various Pollutants in the Streams of Region 8, 2009.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The site-pecific objective for Chloride at Santa Ana River Reach 6 according to table 4-1 of the Santa Ana Basin plan is 10 mg/L.

Objective/Criterion Reference:

Water Quality Control Plan, Santa Ana River Basin

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Data was collected from the SMCR8_124 station.

Temporal Representation:

Data was collected on the following dates: 6/24/2009

Environmental Conditions:

QAPP Information:

The data was analyzed by CSULB and follows California's Surface Water Ambient Monitoring Program protocols. No QAPP provided.

QAPP Information Reference(s):


DECISION ID	73837	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:	Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status	Original
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	There was no new data considered in the 2014 Listing Cycle, this previously made decision will carryover. The following description applies to an earlier Listing Cycle. 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:	This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current. The decision has not changed.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 73837, 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:

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:

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):

Line of Evidence (LOE) for Decision ID 73837, 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 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	77878	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:	Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status	Original
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	There was no new data considered in the 2014 Listing Cycle, this previously made decision will carryover. The following description applies to an earlier Listing Cycle. 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:	This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current. The decision has not changed.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 77878, 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

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 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 77878, 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 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	96364	Region 8
Santa Ana River Reach 6

Pollutant:	Nitrogen, Nitrate
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status	Original
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	This pollutant is being considered for placement on the CWA 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. Zero (0) of the two (2) samples exceed the beneficial use criterion. 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 CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero (0) of the two (2) samples exceed the beneficial use criterion and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples are needed to determine if a beneficial use is fully supported using table 3.1. 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. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 96364, Nitrogen, Nitrate	Region 8
Santa Ana River Reach 6

LOE ID:

82373

Pollutant:

Nitrogen, Nitrate

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

0 of the 2 samples do not exceed the water quality objective for Nitrate (as N) at 10 mg/L. 1 of the 2 samples is reported as underneath the quantitation limit. This quantitation limit is less than or equal to the water quality standard, the value will be considered as meeting the water quality standard, objective, criterion, or evaluation guideline.

Data Reference:

Data for Various Pollutants in the Streams of Region 8, 2009.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Santa Ana Region (1995): Waters designated for MUN shall not contain concentrations of chemical constituents in excess of the MCL specified in Title 22 of the California Code of Regulations. The Nitrate (as N) MCL is 10 mg/L.

Objective/Criterion Reference:

Maximum Contaminant Levels for organic and inorganic chemicals. CCR Title 22

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Sample was collected at 'SMCR8_344 and SMCR8_376, Santa Ana Reach 6.

Temporal Representation:

Samples were collected on 6/17/2009.

Environmental Conditions:

QAPP Information:

No quality assurance information was provided.

QAPP Information Reference(s):


DECISION ID	96365	Region 8
Santa Ana River Reach 6

Pollutant:	Nitrogen, Nitrite
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status	Original
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	This pollutant is being considered for placement on the CWA 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. Zero (0) of the two (2) samples exceed the beneficial use criterion. 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 CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero (0) of the two (2) samples exceed the beneficial use criterion and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples are needed to determine if a beneficial use is fully supported using table 3.1. 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. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 96365, Nitrogen, Nitrite	Region 8
Santa Ana River Reach 6

LOE ID:

82374

Pollutant:

Nitrogen, Nitrite

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

0 of the 2 samples do not exceed the water quality objective for Nitrite (as N) at 1 mg/L. The 2 samples are reported as non-detects. These are less than or equal to the water quality standard, the value will be considered as meeting the water quality standard, objective, criterion, or evaluation guideline.

Data Reference:

Data for Various Pollutants in the Streams of Region 8, 2009.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Maximum Contaminant Levels for organic and inorganic chemicals. CCR Title 22

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Sample was collected at 'SMCR8_344 and SMCR8_376, Santa Ana Reach 6.

Temporal Representation:

Samples were collected on 6/17/2009.

Environmental Conditions:

QAPP Information:

No quality assurance information was provided.

QAPP Information Reference(s):


DECISION ID	76594	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:	Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status	Original
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	There was no new data considered in the 2014 Listing Cycle, this previously made decision will carryover. The following description applies to an earlier Listing Cycle. 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:	This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current. The decision has not changed.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 76594, 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 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 76594, 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

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 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	84240	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:	Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status	Original
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	There was no new data considered in the 2014 Listing Cycle, this previously made decision will carryover. The following description applies to an earlier Listing Cycle. 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 sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples are needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.

Regional Board Decision Recommendation:	This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current. The decision has not changed.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 84240, 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 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 84240, 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 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	95896	Region 8
Santa Ana River Reach 6

Pollutant:	Sulfates
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status	Original
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	This pollutant is being considered for placement on the CWA 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. Zero (0) of the one (1) sample exceeds 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 CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero (0) of the one (1) sample exceeds the water quality objective and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1. 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. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 95896, Sulfates	Region 8
Santa Ana River Reach 6

LOE ID:

82375

Pollutant:

Sulfates

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total Dissolved

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Numeric data generated from 1 sample collected had 0 exceedences of the site-specific objective.

Data Reference:

Data for Various Pollutants in the Streams of Region 8, 2009.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The objectives listed in Table 4-1 shall not be exceeded as a result of controllable water quality factors. The site-specific objective for Sulfates at Santa Ana River Reach 6 according to table 4-1 of the Santa Ana Basin plan is 20 mg/L.

Objective/Criterion Reference:

Water Quality Control Plan, Santa Ana River Basin

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Data was collected from the SMCR8_124 station.

Temporal Representation:

Data was collected on the following dates: 6/24/2009.

Environmental Conditions:

QAPP Information:

The data was analyzed by CSULB and follows California's Surface Water Ambient Monitoring Program protocols. No QAPP provided.

QAPP Information Reference(s):


DECISION ID	95045	Region 8
Santa Ana River Reach 6

Pollutant:	Total Nitrogen as N
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status	Original
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	This pollutant is being considered for placement on the CWA 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. Zero (0) of the two (2) 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 CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero (0) of the two (2) samples exceed the water quality objective and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1. 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. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 95045, Total Nitrogen as N	Region 8
Santa Ana River Reach 6

LOE ID:

82376

Pollutant:

Total Nitrogen as N

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:

0 of 2 samples did not exceed the Total Nitrogen water quality objective at 1 mg/L. The data are reported as non-detects. These non-detects are less than or equal to the water quality standard, the value will be considered as meeting the water quality standard, objective, criterion, or evaluation guideline.

Data Reference:

Data for Various Pollutants in the Streams of Region 8, 2009.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Table 4-1 of the Santa Ana Basin Plan (1995) states that the water quality objective for Total Nitrogen for Santa Ana River (Reach 6), is 1 mg/L.

Objective/Criterion Reference:

Water Quality Control Plan, Santa Ana River Basin

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Sample was collected at 'SMCR8_344 and SMCR8_376, Santa Ana River (Reach 6).

Temporal Representation:

Samples were collected on 6/17/2009.

Environmental Conditions:

QAPP Information:

No quality assurance information was provided.

QAPP Information Reference(s):


DECISION ID	96101	Region 8
Santa Ana River Reach 6

Pollutant:	Toxicity
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status	Original
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	This pollutant is being considered for placement on the CWA section 303(d) List under section 3.6 of the Listing Policy. Under section 3.6 at least one line of evidence is necessary to assess listing status for toxicity, and waters may be placed on the CWA section 303(d) List for toxicity alone. One line of evidence is available in the administrative record to assess this pollutant. Zero of the 1 samples exhibit water toxicity. 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 CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of the 1 samples exhibit water toxicity and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1. 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. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 96101, Toxicity	Region 8
Santa Ana River Reach 6

LOE ID:

82377

Pollutant:

Toxicity

LOE Subgroup:

Toxicity

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

TOXICITY TESTING

Data Used to Assess Water Quality:

One sample was collected to evaluate water toxicity. The sample did not exhibit significant toxicity. The toxicity tests included survival and reproduction of Ceriodaphnia dubia.

Data Reference:

Data for Various Pollutants in the Streams of Region 8, 2009.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Toxic substances shall not be discharged at levels that will bioaccumulate in aquatic resources to levels which are harmful to human health. Region 8 Basin Plan.

Objective/Criterion Reference:

Water Quality Control Plan, Santa Ana River Basin

Evaluation Guideline:

Toxicity is defined as a statistically significant effect in the sample exposure compared to the control using EPA-recommended hypothesis testing. The t-test is used to determine if there is a statistically significant decrease in organism response in the sample as compared to the control.

Guideline Reference:

Short-term Methods for Estimating the Chronic Toxicity of Effluents and Receiving Waters to Freshwater Organisms. Fourth Edition. Office of Water, U.S. Environmental Protection Agency. Washington, D.C. EPA-821-R-02-013

Spatial Representation:

The samples were collected in Santa Ana River Reach 6 at this site SMCR8_124.

Temporal Representation:

The samples were collected in June 2009.

Environmental Conditions:

QAPP Information:

The data was analyzed by CSULB and follows California's Surface Water Ambient Monitoring Program protocols. No QAPP provided.

QAPP Information Reference(s):


DECISION ID	76486	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:	Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status	Original
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	There was no new data considered in the 2014 Listing Cycle, this previously made decision will carryover. The following description applies to an earlier Listing Cycle. 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:	This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current. The decision has not changed.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 76486, 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 76486, 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	76750	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:	Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status	Original
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	There was no new data considered in the 2014 Listing Cycle, this previously made decision will carryover. The following description applies to an earlier Listing Cycle. 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:	This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current. The decision has not changed.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 76750, 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 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	77586	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:	List on 303(d) list (TMDL required list)(2016)
Revision Status	Original
Sources:	A Source Unknown
Expected TMDL Completion Date:	2021
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	There was no new data considered in the 2014 Listing Cycle, this previously made decision will carryover. The following description applies to an earlier Listing Cycle. 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:	This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current. The decision has not changed.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 77586, 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:

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 77586, 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:

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 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 77586, 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 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	77920	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:	List on 303(d) list (TMDL required list)(2016)
Revision Status	Original
Sources:	A Source Unknown
Expected TMDL Completion Date:	2021
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	There was no new data considered in the 2014 Listing Cycle, this previously made decision will carryover. The following description applies to an earlier Listing Cycle. 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:	This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current. The decision has not changed.

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:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 77920, 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):

Line of Evidence (LOE) for Decision ID 77920, 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 77920, 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 77920, 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:

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):


DECISION ID	77671	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:	List on 303(d) list (TMDL required list)(2016)
Revision Status	Original
Sources:	A Source Unknown
Expected TMDL Completion Date:	2021
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	There was no new data considered in the 2014 Listing Cycle, this previously made decision will carryover. The following description applies to an earlier Listing Cycle. 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:	This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current. The decision has not changed.

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:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 77671, 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 77671, 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 77671, 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:

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 77671, 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):