Draft California 2020 Integrated Report (303(d) List/305(b) Report)

Ambient Water Quality Criteria for Bacteria - 1986. EPA440/5-84-002

Evaluation Guideline:

The single sample entercoccus concentration shall not exceed more than 61/100ml. USEPA Ambient Water Quality Criteria for Bacteria 1986.

Guideline Reference:

Spatial Representation:

The samples were collected at stations CK-MILL-01, and CK-CUCAMONGA-02.

Temporal Representation:

The samples were collected once a year in August from 2006 to 2009.

Environmental Conditions:

QAPP Information:

The samples were collected under the Orange County Water District Main Laboratory Quality Assurance Manual. November 2009.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 94368, Indicator Bacteria	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

81439

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Non-Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

Not Specified

Data Used to Assess Water Quality:

Zero of the seven samples exceeded the proposed E.coli target.

Data Reference:

Data for Metals and Other Inorganic Pollutants in Orange County Water District, 1994-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The concentrations of toxic pollutants in the water column, sediments or biota shall not adversely affect beneficial uses. Water Quality Control Plan for the Santa Ana River Basin.

Objective/Criterion Reference:

Ambient Water Quality Criteria for Bacteria - 1986. EPA440/5-84-002

Evaluation Guideline:

The single sample E. coli concentration shall not exceed the proposed anti-degradation target of 1,104/100ml.

Guideline Reference:

Spatial Representation:

The samples were collected at stations CK-CUCAMONGA-02 and CK-MILL-01.

Temporal Representation:

The samples were collected once a year in August from 2006 to 2009.

Environmental Conditions:

QAPP Information:

The samples were collected under the Orange County Water District Main Laboratory Quality Assurance Manual. November 2009.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 94368, Indicator Bacteria	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

81440

Pollutant:

Fecal Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

Not Specified

Data Used to Assess Water Quality:

Four of the seven samples exceeded the fecal coliform objectve.

Data Reference:

Data for Metals and Other Inorganic Pollutants in Orange County Water District, 1994-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The fecal coliform concentration shall not exceed more than 400/100 ml. Water Quality Control Plan for the Santa Ana River Basin.

Objective/Criterion Reference:

Data for Metals and Other Inorganic Pollutants in Orange County Water District, 1994-2010.

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at stations CK-CUCAMONGA-02 and CK-MILL-01.

Temporal Representation:

The samples were collected once a year in August from 2006 to 2009.

Environmental Conditions:

QAPP Information:

The samples were collected under the Orange County Water District Main Laboratory Quality Assurance Manual. November 2009.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 94368, Indicator Bacteria	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

81441

Pollutant:

Total Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

Not Specified

Data Used to Assess Water Quality:

One of the seven samples exceeded the total coliform guideline.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The concentrations of toxic pollutants in the water column, sediments or biota shall not adversely affect beneficial uses. Water Quality Control Plan for the Santa Ana River Basin.

Objective/Criterion Reference:

Draft Guidance for Fresh Water Beaches. Last Update: May 8, 2006. Initial Draft: November 1997. California Department of Public Health.

Evaluation Guideline:

The single sample total coliform concentration shall not exceed more than 10,000/100ml. Guidance for Fresh Water Beaches (CDPH 2011).

Guideline Reference:

Spatial Representation:

The samples were collected at stations CK-CUCAMONGA-02 and CK-MILL-01.

Temporal Representation:

The samples were collected once a year in August from 2006 to 2009.

Environmental Conditions:

QAPP Information:

The samples were collected under the Orange County Water District Main Laboratory Quality Assurance Manual. November 2009.

QAPP Information Reference(s):


DECISION ID	73864	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

Pollutant:	Alachlor \| Atrazine \| Azinphos-methyl (Guthion) \| Carbaryl \| Carbofuran \| Chlorpyrifos \| DDE (Dichlorodiphenyldichloroethylene) \| Dieldrin \| Disulfoton \| Malathion \| Methyl Parathion \| Molinate \| Thiobencarb/Bolero
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 three (3) samples exceeded the US EPA National Recommended Ambient Water Quality Criteria Aquatic Life Protection Instantaneous Maximum 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 73864, Multiple Pollutants	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

7813

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Limited Warmwater

Number of Samples:

Number of Exceedances:

Data and Information Type:

Not Specified

Data Used to Assess Water Quality:

Of the three samples collected none exceeded the guidelines.

Data Reference:

Concentrations of Pesticides in the waterbodies in the Santa Ana Region

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:

USEPA National Recommended Ambient Water Quality Criteria Aquatic Life Protection Instantaneous Max - alachlor: 76 ppb, atrazine: 1 ppb, azinphos methyl: 0.01 ppb, carbaryl: 0.02 ppb, carbofuran: 0.5 ppb, disulfoton: 0.05 ppb, malathion: 0.01 ppb.
California Department of Fish and Game: chlropyrifos: 0.014 ppb, parathion: 0.08 ppb, molinate: 13 ppb, permethrin: 0.03 ppb, thiobencarb: 3.1 ppb. USEPA National Recommended Ambient Water Quality Criteria Aquatic Life Protection Cont Conc 4 day ave: DDE: 0.001 ppb. CTR Freshwater aquatic life protection Cont Conc 4 day ave - dieldrin: 0.056 ppb

Guideline Reference:

Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game

Spatial Representation:

The samples were collected at the following locations: Cucamonga Creek Near Upland California_USGS NAWQA site; Cucamonga Creek Main Channel at Chino ave Near Ontario California_USGS NAWQA site; Cucamonga Creek Near Mira Loma California_USGS NAWQA site.

Temporal Representation:

The samples were collected on 8/8/00, 8/9/00, 8/16/00.

Environmental Conditions:

QAPP Information:

The data's quality is deemed appropriate because it came from the Department of Pesticide Regulation.

QAPP Information Reference(s):


DECISION ID	74125	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

Pollutant:	Aluminum \| Arsenic \| Nickel \| Selenium \| 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 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Twenty-three 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 two hundred sixty-four (264) samples exceeded the California Toxics Rule Criteria, the Basin Plan Objective, and USEPA National Recommended Ambient Water Quality Criteria for Aquatic life protection 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 74125, Multiple Pollutants	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

8301

Pollutant:

Aluminum | Selenium

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

There was only one sample collected and it did not exceed the guidelines.

Data Reference:

Water Quality Control Plan for the Santa Ana River Basin

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:

Evaluation Guideline:

USEPA National Recommended Ambient Water Quality Criteria for Aquatic life protection 4 day avg: Aluminum: 87 ppb (expressed as total recoverable), and 1 hr concentration: 750 ppb;
CTR Fresh Water Aquatic Life Protection 4 day Average continuous concentration

National Toxics Rule Aquatic Life: Selenium 4-day avg. 5 ug/l and 1-hr avg. 20 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 sample was collected in Cucamonga Creek near Mira Loma

Temporal Representation:

The sample was collected on August 16, 2005.

Environmental Conditions:

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 74125, Multiple Pollutants	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

5904

Pollutant:

Arsenic | Selenium

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Of the 7 samples taken, none exceeded the standards/guidelines 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:

California Toxics Rule Aquatic Life: Arsenic 4-day avg. 150 ug/l, and 1-hr avg. 340 ug/l.
National Toxics Rule Aquatic Life: Selenium 4-day avg. 5 ug/l and 1-hr avg. 20 ug/l.

Guideline Reference:

Spatial Representation:

The 7 samples were collected at the Baseline Road at Alta Cuesta Avenue. The samples were collected from one gauging station 20 feet south of Baseline Road on the west side of Cucamonga Creek Channel in the City of Rancho Cucamonga.

Temporal Representation:

The samples were taken on the following dates: 6/8/94, 8/16/94, 6/6/95, 8/14/95, 7/30/96, 8/20/97, 7/29/98.

Environmental Conditions:

The samples were collected 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 74125, Multiple Pollutants	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

5909

Pollutant:

Arsenic | Selenium

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Of the 16 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: Arsenic 4-day avg. 150 ug/l and 1-hr avg. 340 ug/l.
National Toxics Rule Aquatic Life: Selenium 4-day avg. 5 ug/l and 1-hr avg. 20 ug/l.

Guideline Reference:

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

Spatial Representation:

The 16 samples were collected at the Baseline Road at Alta Cuesta Avenue. The samples were collected from one gauging station 20 feet south of Baseline Road on the west side of Cucamonga Creek Channel in the City of Rancho Cucamonga.

Temporal Representation:

The samples were collected on: 2/17/94, 3/19/94, 11/10/94, 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.

Environmental Conditions:

The samples were collected in the wet weather's first flush.

QAPP Information:

The data was provided by an NPDES discharger in compliance with the permit's monitoring requirements.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 74125, Multiple Pollutants	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

5929

Pollutant:

Arsenic

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm 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:

Spatial Representation:

The samples were taken from one station located 75 feet east of the Hellman Avenue Bridge, between Pine Avenue/Schleisman Road and Chino Corona Road/Chandler Street on the south side of Cucamonga Creek Channel near the City of Chino in San Bernardino County.

Temporal Representation:

The samples were taken on 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, 11/21/96, 12/9/96, 11/26/97, 1/9/98, 2/3/98, 3/25/98, 1/25/00, 1/8/01, 1/24/01, 2/23/01, 4/7/01, 12/25/03, 2/2/04, 2/18/04.

Environmental Conditions:

The samples were collected in the wet weather's first flush.

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 74125, Multiple Pollutants	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

5926

Pollutant:

Arsenic

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm 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: Arsenic 4-day avg. 150 ug/l and 1-hr avg. 340 ug/l.

Guideline Reference:

Spatial Representation:

The samples were taken from the Cucamonga Creek Channel at the gauging station located 400 feet south of Highway 60 across from the Chino Basin Municipal Water District Wastewater Treatment Plant on the east side of Cucamonga Creek Channel in the City of Ontario.

Temporal Representation:

The samples were taken on 2/17/94, 3/19/94, 11/10/94, 1/23/95, 3/10/95, 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, 1/8/01, 1/24/01, 2/23/01, 4/7/01, 12/24/03, 2/2/04, 2/18/04.

Environmental Conditions:

The samples were taken 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 74125, Multiple Pollutants	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

5932

Pollutant:

Arsenic

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm 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: Arsenic 4-day avg. 150 ug/l and 1-hr avg. 340 ug/l.

Guideline Reference:

Spatial Representation:

Temporal Representation:

Environmental Conditions:

The samples were taken 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 74125, Multiple Pollutants	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

5910

Pollutant:

Arsenic

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Of the 16 samples taken, 0 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:

Spatial Representation:

Temporal Representation:

The samples were collected on: 2/17/94, 3/19/94, 11/10/94, 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.

Environmental Conditions:

The samples were taken 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 74125, Multiple Pollutants	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

5913

Pollutant:

Arsenic

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Limited Warmwater

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Of the 23 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:

Spatial Representation:

Temporal Representation:

The samples were taken on the following dates: 3/19/94, 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, 1/8/01, 1/24/01, 2/23/01, 4/7/01, 12/24/03, 2/2/04, 2/18/04.

Environmental Conditions:

The samples were collected in the wet weather's first flush.

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 74125, Multiple Pollutants	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

5911

Pollutant:

Arsenic | Selenium | pH

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm 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 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 units or depressed below 6.5 units as a result of controllable water quality factors.
For the metals, the following objective applies:
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: Arsenic 4-day avg. 150 ug/l and 1-hr avg. 340 ug/l.

National Toxics Rule Aquatic Life: Selenium 4-day avg. 5 ug/l and 1-hr avg. 20 ug/l.

Guideline Reference:

Spatial Representation:

Temporal Representation:

The samples were taken on the following dates: 6/8/94, 8/16/94, 11/1/94, 6/6/95, 8/14/95, 7/30/96, 8/20/97, 7/29/98.

Environmental Conditions:

The samples were collected in the wet weather's first flush.

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 74125, Multiple Pollutants	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

5928

Pollutant:

Arsenic | Selenium | pH

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm 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 Numeric Objective pH: 6.5 - 8.5 units.
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: Arsenic 4-day avg. 150 ug/l and 1-hr avg. 340 ug/l;

National Toxics Rule Aquatic Life: Selenium 4-day avg. 5 ug/l and 1-hr avg. 20 ug/l.

Guideline Reference:

Spatial Representation:

Temporal Representation:

The samples were taken on the following dates: 6/8/94, 8/16/94, 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 74125, Multiple Pollutants	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

5927

Pollutant:

Arsenic | Selenium | pH

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm 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 Numeric Objective: pH 6.5 - 8.5 units.
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.

National Toxics Rule Aquatic Life: Selenium 4-day avg. 5 ug/l and 1-hr avg. 20 ug/l.

Guideline Reference:

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

Spatial Representation:

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, 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, 12/24/03, 2/2/04, 2/18/04.

Environmental Conditions:

The samples were taken 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 74125, Multiple Pollutants	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

8374

Pollutant:

Nickel

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

None of the samples taken exceeded the standard. This data came from the database compiled by Wildermouth Environmental Consulting Services on behalf of the sewage treatment dischargers in the upper Santa An River watershed.

Data Reference:

Water Quality Control Plan for the Santa Ana River Basin

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Basin Plan objective: The concentrations of toxic pollutants in the water column, sediments, or biota shall not adversely affect beneficial uses.

Objective/Criterion Reference:

Evaluation Guideline:

The California Toxics Rule criteria is hardness dependent and ranged as follows: nickel - 60.43 ppb.

Guideline Reference:

Spatial Representation:

The sample was taken in Cucamonga Creek near Mira Loma

Temporal Representation:

The sample was taken on 8/16/2005

Environmental Conditions:

The sample was taken during the dry season conditions.

QAPP Information:

The data's quality is deemed acceptable because it was submitted by an NPDES discharger in accordance with its Monitoring and Reporting Requirements.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 74125, Multiple Pollutants	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

5914

Pollutant:

Selenium

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Of the 18 samples taken, 0 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.
California Toxics Rule Aquatic Life (this criteria varies according to hardness as follows): 3/19/94: 25.43 ug/l, 11/10/94: 247.53 ug/l, 1/23/95: 29.54 ug/l, 3/10/95: 20.68 ug/l, 1/31/96: 32.93 ug/l, 2/19/96: 197.31 ug/l, 3/4/96: 52.79 ug/l, 3/13/96: 49.04 ug/l, 10/30/96: 248.85 ug/l, 11/21/96: 102.97 ug/l, 12/9/96: 36.39 ug/l, 11/26/97: 40.81 ug/l, 1/9/98: 14.7 ug/l, 2/3/98: 15.42 ug/l, 3/25/98: 125.3 ug/l, 12/24/03: 114 ug/l, 2/2/04: 41.21 ug/l, 2/18/04: 35.51 ug/l.

Guideline Reference:

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

Spatial Representation:

Temporal Representation:

The samples were taken on the following dates: 3/19/94, 11/10/94, 1/23/95, 3/10/95, 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, 12/24/03, 2/2/04, 2/18/04.

Environmental Conditions:

The samples were collected in the wet weather's first flush.

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 74125, Multiple Pollutants	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

5931

Pollutant:

Selenium

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Of the 17 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:

San Bernardino County Flood Control District data from storm water program

Spatial Representation:

Temporal Representation:

The samples were taken on the following dates: 2/17/94, 3/19/94, 11/10/94, 3/10/95, 1/31/96, 2/19/96, 3/4/96, 3/13/96, 11/21/96, 12/9/96, 11/26/97, 1/9/98, 2/3/98, 3/25/98, 12/25/03, 2/2/04, 2/18/04.

Environmental Conditions:

The samples were collected in the wet weather's first flush.

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 74125, Multiple Pollutants	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

5925

Pollutant:

Selenium

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Of the 18 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:

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:

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

Spatial Representation:

Temporal Representation:

The samples were taken on 2/17/94, 3/19/94, 11/10/94, 3/10/95, 12/12/95, 1/31/96, 2/19/96, 3/4/96, 3/13/96, 11/21/96, 12/9/96, 11/26/97, 1/9/98, 2/3/98, 3/25/98, 12/25/03, 2/3/04, 2/19/04.

Environmental Conditions:

The samples were taken 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 74125, Multiple Pollutants	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

5924

Pollutant:

Selenium

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm 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:

National Toxics Rule Aquatic Life: Selenium 4-day avg. 5 ug/l and 1-hr avg. 20 ug/l.

Guideline Reference:

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

Spatial Representation:

Temporal Representation:

The samples were taken on 2/17/94, 3/19/94, 11/10/94, 3/10/95, 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, 12/24/03, 2/2/04, 2/18/04.

Environmental Conditions:

The samples were taken 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 74125, Multiple Pollutants	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

5915

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Warm 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:

Temporal Representation:

The samples were taken on the following dates: 12/25/03, 2/3/04, 2/19/04.

Environmental Conditions:

The samples were taken 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 74125, Multiple Pollutants	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

5905

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Warm 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 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 3 samples were collected at the Baseline Road at Alta Cuesta Avenue. The samples were collected from one gauging station 20 feet south of Baseline Road on the west side of Cucamonga Creek Channel in the City of Rancho Cucamonga.

Temporal Representation:

The samples were collected on 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 74125, Multiple Pollutants	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

5930

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Water Quality Control Plan for the Santa Ana River Basin

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Santa Ana Region's Basin Plan Numeric Objective: 6.5-8.5 units

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Temporal Representation:

The samples were taken on 12/25/03, 2/2/04, 2/18/04

Environmental Conditions:

The samples were collected in the wet weather's first flush.

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	73545	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

Pollutant:	Chemical oxygen demand (COD)
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 ten 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 73545, Chemical oxygen demand (COD)	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

7958

Pollutant:

Chemical oxygen demand (COD)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Of the ten samples collected none exceeded the Basin Plan's objective.

Data Reference:

Water Quality Control Plan for the Santa Ana River Basin

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Santa Ana Region's Basin Plan Objective: 30 mg/l

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at one station in Cucamonga Creek Near Mira Loma.

Temporal Representation:

The samples were collected multiple times during the month for a period of several years beginning with 6/20/2000 through 2/21/2007.

Environmental Conditions:

QAPP Information:

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

QAPP Information Reference(s):


DECISION ID	73340	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

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:	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. Ten 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 one hundred forty-two (142) samples exceeded the Basin Plan Objective and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.

Regional Board Decision Recommendation:	This 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 73340, Chloride	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

7956

Pollutant:

Chloride

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

142

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Of the 142 samples taken, none exceeded the Basin Plan's objective.

Data Reference:

Water Quality Control Plan for the Santa Ana River Basin

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:

Evaluation Guideline:

US EPA National Recommended Ambient Water Quality Criteria Freshwater Aquatic Life Protection Recommended Criteria Maximum Concentration 1-hr avg 860 mg/l

Guideline Reference:

Spatial Representation:

The samples were collected at one station in Cucamonga Creek Near Mira Loma.

Temporal Representation:

The samples were collected multiple times during the month for a period of several years beginning with 6/20/2000 through 2/21/2007.

Environmental Conditions:

QAPP Information:

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

QAPP Information Reference(s):


DECISION ID	76585	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

Pollutant:	Diazinon
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 line of evidence is available in the administrative record to assess this pollutant. One (1) 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 (1) of three (3) samples exceeded the California Department of Fish and Game 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 76585, Diazinon	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

7816

Pollutant:

Diazinon

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

of the three samples collected only one exceeded the guideline.

Data Reference:

Concentrations of Pesticides in the waterbodies in the Santa Ana Region

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 Department of Fish and Game 0.08 ppb

Guideline Reference:

Water quality criteria for diazinon and chlorpyrifos. Administrative Report 00-3. Rancho Cordova, CA: Pesticide Investigations Unit, Office of Spills and Response. CA Department of Fish and Game

Spatial Representation:

The samples were collected at the following stations: Cucamonga Creek Near Upland California_USGS NAWQA site, Cucamonga Creek Main Channel at Chino ave Near Ontario California_USGS NAWQA site, Cucamonga Creek Near Mira Loma California_USGS NAWQA site.

Temporal Representation:

The samples were collected on 8/8/00, 8/9/00, 8/16/00.

Environmental Conditions:

QAPP Information:

The data's quality is deemed appropriate because it came from the Department of Pesticide Regulation.

QAPP Information Reference(s):


DECISION ID	73815	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

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. Nine (9) 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 twenty three (23) samples exceeded the EPA National Recommended Criteria during the dry season and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. Several other samples were collected that exceed the recommended criteria but these samples were collected during the wet weather and the chronic recommended criteria does not apply. 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:	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. Nine (9) 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 twenty three (23) samples exceeded the EPA National Recommended Criteria during the dry season and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. Several other samples were collected that exceed the recommended criteria but these samples were collected during the wet weather and the chronic recommended criteria does not apply. 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 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 73815, Iron	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

25681

Pollutant:

Iron

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm 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 taken, one exceeded the reccomended criteria 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:

US EPA National Ambient Water Quality Criteria Toxicity: reccomended chroinic criteria for iron 4-day avg. 1000 ug/l.

Guideline Reference:

Spatial Representation:

Temporal Representation:

The samples were taken on the following dates: 6/8/94, 8/16/94, 11/1/94, 6/6/95, 8/14/95, 7/30/96, 8/20/97, 7/29/98.

Environmental Conditions:

The samples were collected in 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 73815, Iron	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

25664

Pollutant:

Iron

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Of the 7 samples taken, one exceeded the standards/guidelines 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: chronic reccomended criteria for iron 4-day avg. 1000 ug/l.

Guideline Reference:

San Bernardino County Flood Control District data from storm water program

Spatial Representation:

Temporal Representation:

The samples were taken on the following dates: 6/8/94, 8/16/94, 6/6/95, 8/14/95, 7/30/96, 8/20/97, 7/29/98.

Environmental Conditions:

The samples were collected 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 73815, Iron	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

25676

Pollutant:

Iron

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

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 reccomended chronic criteria 4-day avg. 1000 ug/l.

Guideline Reference:

Spatial Representation:

Temporal Representation:

The samples were taken on the following dates: 6/8/94, 8/16/94, 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 73815, Iron	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

5990

Pollutant:

Iron

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Of the 38 samples taken, 37 exceeded the reccomended 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: chronic reccomended criteria for iron 4-day avg. 1000 ug/l.

Guideline Reference:

Spatial Representation:

Temporal Representation:

The samples were taken monthly since 2/17/1994 through 2/19/2004.

Environmental Conditions:

The samples were collected in the wet weather's first flush.

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 73815, Iron	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

5964

Pollutant:

Iron

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Of the 22 samples taken, 22 exceeded the reccomended criteria 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:

US EPA National Ambient Water Quality Criteria Toxicity: chronic reccomended criteria iron 4-day avg. 1000 ug/l.

Guideline Reference:

San Bernardino County Flood Control District data from storm water program

Spatial Representation:

The samples were collected at Baseline Road and Alta Cuesta Avenue from the gauging station located 20 feet south of Baseline Road on the west side of Cucamonga Creek Channel in the City of Rancho Cucamonga.

Temporal Representation:

The samples were taken monthly starting with 2/17/1994 through 4/17/2000 during the wet weather's first flush.

Environmental Conditions:

The samples were collected in the wet weather's first flush.

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 73815, Iron	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

6013

Pollutant:

Iron

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Of the 37 samples taken, 34 exceeded the reccomended criteria listed. This data was obtained from the self monitoring reports submitted by San Bernardino County Flood Control District Storm Water Program.

Data Reference:

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 4-day avg. 1000 ug/l.

Guideline Reference:

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

Spatial Representation:

Temporal Representation:

The samples were collected monthly since 2/17/94, through 2/18/2004.

Environmental Conditions:

The samples were collected in the wet weather's first flush.

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 73815, Iron	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

5980

Pollutant:

Iron

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Of the 20samples taken, all exceeded the reccomended criteria 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:

US EPA National Ambient Water Quality Criteria Toxicity: reccomended chronic criteria for iron 4-day avg. 1000 ug/l.

Guideline Reference:

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

Spatial Representation:

Temporal Representation:

The samples were collected monthly since 2/17/1994 through 4/17/2000 during the wet weather.

Environmental Conditions:

The samples were taken 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 73815, Iron	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

6021

Pollutant:

Iron

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Of the 38 samples taken, 35 exceeded the reccomended 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: chronic recommended criteria for iron 4-day avg. 1000 ug/l.

Guideline Reference:

Spatial Representation:

Temporal Representation:

The samples were taken monthly since 2/17/94 through 2/19/2004.

Environmental Conditions:

The samples were taken 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 73815, Iron	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

6007

Pollutant:

Iron

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Of the 41 samples taken, 39 exceeded the reccomended criteria 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:

US EPA National Ambient Water Quality Criteria Toxicity: chronic reccomended criteria for iron 4-day avg. 1000 ug/l.

Guideline Reference:

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

Spatial Representation:

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, 11/21/96, 12/9/96, 11/26/97, 1/9/98, 2/3/98, 3/25/98, 12/25/03, 2/3/04, 2/19/04.

Environmental Conditions:

The samples were taken 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	73728	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

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. Ten (10) lines of evidence are available in the administrative record to assess this pollutant. Four (4) 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. Four (4) of 195 samples exceeded the EPA's National 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 73728, Mercury	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

25666

Pollutant:

Mercury

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Of the 7 samples taken, all were reported as non detect and the detection limit was above the recommended criteria so none of the samples were counted to determine the rate of exceedances. 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 4-day avg. 0.77 ug/l.

Guideline Reference:

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

Spatial Representation:

Temporal Representation:

The samples were taken on the following dates: 6/8/94, 8/16/94, 6/6/95, 8/14/95, 7/30/96, 8/20/97, 7/29/98.

Environmental Conditions:

The samples were collected during the dry weather.

QAPP Information:

The data was provided by an NPDES discharger in compliance with the permit's monitoring requirements.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 73728, Mercury	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

5987

Pollutant:

Mercury

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm 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 taken, all were reported as non detect and the detection limit was higher than the recommended criteria so non onf the samples were used to determine the rate of exceedance. 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 4-day avg. 0.77 ug/l.

Guideline Reference:

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

Spatial Representation:

Temporal Representation:

The 7 samples were taken on 6/8/94, 8/16/94, 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 was provided by an NPDES discharger in compliance with the permit's monitoring requirements.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 73728, Mercury	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

6020

Pollutant:

Mercury

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm 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 taken, the detection limit was higher than the criteria used to assess the beneficial use. That is why none of the samples were taken into account when determining the rate of exceedance. 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 4-day avg. acute criteria 0.77 ug/l.

Guideline Reference:

Spatial Representation:

Temporal Representation:

The samples were taken monthly since June 1994 through July 1998 in the dry season.

Environmental Conditions:

The samples were taken during the dry weather.

QAPP Information:

The data was provided by an NPDES discharger in compliance with the permit's monitoring requirements.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 73728, Mercury	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

5992

Pollutant:

Mercury

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Of the 38 samples taken, all were non detect and the detection limit was below the recommended criteria so none of them exceeded the reccommended 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 recommended criteria 1.4 ug/l.

Guideline Reference:

Spatial Representation:

Temporal Representation:

The samples were collected on: 2/17/94, 3/19/94, 11/10/94, 1/23/95, 3/10/95, 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, 1/8/01, 2/24/01, 2/23/01, 4/7/01, 12/24/03, 2/2/04, 2/18/04.

Environmental Conditions:

The samples were taken during the wet weather.

QAPP Information:

The data was provided by an NPDES discharger in compliance with the permit's monitoring requirements.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 73728, Mercury	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

29114

Pollutant:

Mercury

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

There was only one sample collected and it did not exceed the guidelines.

Data Reference:

Water Quality Control Plan for the Santa Ana River Basin

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:

Evaluation Guideline:

US EPA National Ambient Water Quality Criteria Toxicity: Mercury 4-day avg. acute criteria 0.77 ug/l

Guideline Reference:

San Bernardino County Flood Control District data from storm water program

Spatial Representation:

The sample was collected in Cucamonga Creek near Mira Loma

Temporal Representation:

The sample was collected on August 16, 2005

Environmental Conditions:

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 73728, Mercury	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

5982

Pollutant:

Mercury

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm 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, one exceeded the reccomended criteria listed. This data was obtained from the self monitoring reports submitted by San Bernardino County Flood Control District Storm Water Program.

Data Reference:

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 reccomended criteria 1.4 ug/l.

Guideline Reference:

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

Spatial Representation:

Temporal Representation:

The samples were taken monthly in the wet weather beginningn with 2/17/1994 through 4/17/2000

Environmental Conditions:

The samples were taken during the wet weather.

QAPP Information:

The data was provided by an NPDES discharger in compliance with the permit's monitoring requirements.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 73728, Mercury	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

6006

Pollutant:

Mercury

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Of the 38 samples taken, 1 exceeded the recommended criteria 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:

US EPA National Ambient Water Quality Criteria Toxicity: Mercury acute recommended criteria 1.4 ug/l.

Guideline Reference:

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

Spatial Representation:

Temporal Representation:

The samples were taken monthly in the wet season from February 17,1994 through February 18, 2004

Environmental Conditions:

The samples were taken during the wet weather.

QAPP Information:

The data was provided by an NPDES discharger in compliance with the permit's monitoring requirements.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 73728, Mercury	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

5967

Pollutant:

Mercury

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm 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, 1 exceeded the recommended criteria listed. More samples than 24 were collected at the station but only 24 had reported values that were higher than the detection limit and could be compared to the recommended criteria. The other values were reported as non detect and the detection limit was higher than the recommended 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 acute criteria 1.4 ug/l.

Guideline Reference:

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

Spatial Representation:

Temporal Representation:

The samples were taken on the following dates: 3/19/1994
11/10/1994, 1/23/1995, 3/10/1995, 12/12/1995, 1/31/1996, 2/19/1996, 3/4/1996, 3/13/1996, 10/30/1996, 11/21/1996, 12/9/1996, 11/26/1997,, 1/9/1998, 2/3/1998, 3/25/1998, 11/8/1998, 1/25/1999, 2/9/1999, 3/16/1999, 4/7/1999
1/25/2000, 2/27/2000, 3/4/2000, 4/17/2000, 1/8/2001,1/24/2001, 2/23/2001, 4/7/2001, 11/13/2001, 11/24/2001, 1/27/2002, 3/17/2002, 11/8/2002, 2/11/2003
3/15/2003, 12/24/2003, 2/2/2004, 2/18/2004,

Environmental Conditions:

The samples were collected in the wet weather's first flush.

QAPP Information:

The data was provided by an NPDES discharger in compliance with the permit's monitoring requirements.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 73728, Mercury	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

25682

Pollutant:

Mercury

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Of the 36 samples taken, none exceeded the recommended cirteria 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:

US EPA National Ambient Water Quality Criteria Toxicity: Mercury acute recommended criteira of 1.4 ug/ll.

Guideline Reference:

Spatial Representation:

Temporal Representation:

The samples were taken monthly since 2/17/1994 thorugh 2/18/2004 during the wet season.

Environmental Conditions:

The samples were collected in the wet weather's first flush.

QAPP Information:

The data was provided by an NPDES discharger in compliance with the permit's monitoring requirements.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 73728, Mercury	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

6014

Pollutant:

Mercury

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Of the 34 samples taken, 1 exceeded the recommended 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 acute recommended criteria of 1.4 ug/l.

Guideline Reference:

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

Spatial Representation:

Temporal Representation:

The samples were collected on: 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, 11/21/96, 12/9/96, 11/26/97, 1/9/98, 2/3/98, 3/25/98, 1/25/00, 1/8/01, 1/24/01, 2/23/01, 4/7/01, 12/25/03, 2/2/04, 2/18/04.

Environmental Conditions:

The samples were collected in the wet weather's first flush.

QAPP Information:

The data was provided by an NPDES discharger in compliance with the permit's monitoring requirements.

QAPP Information Reference(s):


DECISION ID	76542	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

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. Ten (10) 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 (1) of 37 samples exceeded the CTR 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 76542, Silver	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

5988

Pollutant:

Silver

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Eight samples were taken at this station and all of these were reported as non detect. The detection limit was above the CTR criteria so none of the samples were used in the assessment. 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): 6/8/94: 11.58 ug/l, 8/16/94: 10 ug/l, 11/1/94: 8.63 ug/l, 6/6/95: 10 ug/l, 8/14/95: 7.97 ug/l, 7/30/96: 8.15 ug/l, 8/20/97: 8.15 ug/l, 7/29/98: 7.24 ug/l.

Guideline Reference:

Spatial Representation:

Temporal Representation:

The samples were taken on 6/8/94, 8/16/94, 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 76542, Silver	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

6000

Pollutant:

Silver

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

18 samples were taken but only 10 of these were used in the assessment because out of all the samples that were reported as non detect, only 10 had detection lmiits below the criteria. Of these 10, none exceeded 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 (this criteria varies according to hardness as follows): 3/19/94: 7.15 ug/l, 11/10/94: 9.11 ug/l, 1/23/95: 28.89 ug/l, 3/10/95: 1.88 ug/l, 12/12/95: 101.27 ug/l, 1/31/96: 4.78 ug/l, 2/19/96: 10.11 ug/l, 3/4/96: 12.24 ug/l, 3/13/96: 4.78 ug/l, 11/21/96: 8.15 ug/l, 12/9/96: 2.59 ug/l, 11/26/97: 3.19 ug/l, 1/9/98: 2.71 ug/l, 2/3/98: 2.14 ug/l, 3/25/98: 6.37 ug/l, 12/25/03: 5.55 ug/l, 2/2/04: 4.78 ug/l, 2/18/04: 22.41 ug/l.

Guideline Reference:

Spatial Representation:

Temporal Representation:

The samples were taken on the following dates: 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, 11/21/96, 12/9/96, 11/26/97, 1/9/98, 2/3/98, 3/25/98, 12/25/03, 2/2/04, 2/18/04.

Environmental Conditions:

The samples were collected in the wet weather's first flush.

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 76542, Silver	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

25686

Pollutant:

Silver

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Water Quality Control Plan for the Santa Ana River Basin

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Basin Plan objective: The concentrations of toxic pollutants in the water column, sediments, or biota shall not adversely affect beneficial uses.

Objective/Criterion Reference:

Evaluation Guideline:

The California Toxics Rule cadmium criteria is hardness dependent and ranged as follows: silver - 5.47 ppb

Guideline Reference:

Spatial Representation:

The sample was taken in Cucamonga Creek near Mira Loma

Temporal Representation:

The sample was taken on 8/16/2005

Environmental Conditions:

The sample was taken during the dry season conditions.

QAPP Information:

The data's quality is deemed acceptable because it was submitted by an NPDES discharger in accordance with its Monitoring and Reporting Requirements.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 76542, Silver	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

5977

Pollutant:

Silver

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Sixteen samples were taken and these were reported as non detect. Of these only one had a detection limit below the CTR standard. 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): silver: 2/17/94: 0.48 ug/l, 3/19/94: 0.35 ug/l, 11/10/94: 2.04 ug/l, 3/10/95: 0.28 ug/l, 12/12/95: 20.44 ug/l, 1/31/96: 0.54 ug/l, 2/19/96: 3.26 ug/l, 3/4/96: 1.36 ug/l, 3/13/96: 2.65 ug/l, 10/30/96: 11.15 ug/l, 11/21/96: 1.07 ug/l, 12/9/96: 1.27 ug/l, 11/26/97: 0.77 ug/l, 1/9/98: 0.51 ug/l, 2/3/98: 0.37 ug/l, 3/25/98: 0.60 ug/l.

Guideline Reference:

Spatial Representation:

Temporal Representation:

The samples were taken on the following dates: 2/17/94, 3/19/94, 11/10/94, 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

Environmental Conditions:

The samples were taken 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 76542, Silver	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

5991

Pollutant:

Silver

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm 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, all were reported as non detect and of these only one was used in the assessmnet because the detection limit of this one was below 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 (this criteria varies according to hardness as follows): 2/17/94: 0.40 ug/l, 3/19/94: 0.84 ug/l , 11/10/94: 4.41 ug/l, 1/23/95: 0.30 ug/l, 3/10/95: 0.51 ug/l, 1/31/96: 0.54 ug/l, 2/19/96; 6.37 ug/l, 3/4/96: 1.07 ug/l, 3/13/96: 0.28 ug/l, 10/30/96: 33.31 ug/l, 11/21/96: 1.54 ug/l, 12/9/96: 1.11 ug/l, 11/26/97: 1.23 ug/l, 1/9/98: 0.70 ug/l, 2/3/98: 0.57 ug/l, 3/25/98: 3.32 ug/l, 12/24/03: 4.78 ug/l, 2/2/04: 2.89 ug/l, 2/18/04: 0.91 ug/l.

Guideline Reference:

Spatial Representation:

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, 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, 12/24/03, 2/2/04, 2/18/04.

Environmental Conditions:

The samples were taken 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 76542, Silver	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

5995

Pollutant:

Silver

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Of the 18 samples taken, most were reported as non detect and of these only 3 had detection limits below the criteria and only one was reported above the detection limit and it exceeded 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 (this criteria varies according to hardness as follows): silver 3/19/94: 0.84 ug/l, 11/10/94: 18.17 ug/l, 1/23/95: 1.03 ug/l, 3/10/95: 0.63 ug/l, 1/31/96: 1.19 ug/l, 2/19/96: 13.37 ug/l, 3/4/96: 2.25 ug/l, 3/13/96: 2.04 ug/l, 10/30/96: 18.30 ug/l, 11/21/96: 5.55 ug/l, 12/9/96: 1.36 ug/l, 11/26/97: 1.59 ug/l, 1/9/98: 0.40 ug/l, 2/3/98: 0.43 ug/l, 3/25/98: 7.24 ug/l, 12/24/03: 6.37 ug/l, 2/2/04: 1.64 ug/l, 2/18/04: 1.32 ug/l.

Guideline Reference:

Spatial Representation:

Temporal Representation:

Environmental Conditions:

The samples were collected in the wet weather's first flush.

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 76542, Silver	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

6005

Pollutant:

Silver

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Nineteen samples were taken butt of these 14 were reported as non detect and the detection limit was above the CTR criteria. Of the remaining 5 samples, non exceeded the CTR 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: 1.99 ug/l, 3/19/94: 1.88 ug/l, 11/10/94: 3.65 ug/l, 1/23/95: 49.49 ug/l, 3/10/95: 1.41 ug/l, 12/12/95: 21.84 ug/l, 1/31/96: 7.24 ug/l, 2/19/96: 5.55 ug/l, 3/4/96: 9.11 ug/l, 3/13/96: 4.78 ug/l, 11/21/96: 2.47 ug/l, 12/9/96: 2.09 ug/l, 11/26/97: 1.54 ug/l, 1/9/98: 2.59 ug/l, 2/3/98: 1.36 ug/l, 3/25/98: 8.15 ug/l, 12/25/03: 2.65 ug/l, 2/3/04: 11.15 ug/l, 2/19/04: 3.99 ug/l.

Guideline Reference:

Spatial Representation:

Temporal Representation:

Environmental Conditions:

The samples were taken 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 76542, Silver	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

5968

Pollutant:

Silver

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

15 samples were collected and all were reported as non detect and of these only three had detection limits bekiw the criteria. So only three were used in the assessment.. 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 with hardness as folows:) 3/19/94: 1.32 ug/l, 11/10/94: 21 ug/l, 3/10/95: 0.14 ug/l, 12/12/95: 97.8 ug/l, 1/31/96: 1.32 ug/l, 2/19/96: 9.11 ug/l, 3/4/96: 0.99 ug/l, 3/13/96: 0.88 ug/l, 10/30/96: 71.48 ug/l, 11/21/96: 3.45 ug/l, 12/9/96: 1.99 ug/l, 11/26/97: 2.28 ug/l, 1/9/98: 0.32 ug/l, 2/3/98: 0.4 ug/l, 3/25/98: 0.60 ug/l.

Guideline Reference:

Spatial Representation:

Temporal Representation:

The samples were taken on the following dates: 3/19/94, 11/10/94, 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.

Environmental Conditions:

The samples were collected in the wet weather's first flush.

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 76542, Silver	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

25678

Pollutant:

Silver

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm 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 taken, only 5 were used in the assessment because the other 3 were reported as non detect and the detection limit was above the criteria. Of the 5 remaining, none exceeded the criteria. This data was obtained from the self monitoring reports submitted by San Bernardino County Flood Control District Storm Water Program.

Data Reference:

Final Data File used for assessment: ESNERR (Elkhorn Slough National Reserve) Water Quality Data from 2006

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: this criteria varies according to hardness as follows: Silver: 6/8/94: 7.60 ug/l, 8/16/94: 15.14 ug/l, 11/1/94: 7.06 ug/l, 6/6/95: 13.14 ug/l, 8/14/95: 21.42 ug/l, 7/30/96: 6.37 ug/l, 8/20/97: 17 ug/l, 7/29/98: 19.63 ug/l;

Guideline Reference:

Spatial Representation:

Temporal Representation:

The samples were taken on the following dates: 6/8/94, 8/16/94, 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 76542, Silver	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

25668

Pollutant:

Silver

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm 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: silver: 6/8/94: 27.48 ug/l, 8/16/94: 14.19 ug/l, 6/6/95: 20.72 ug/l, 8/14/95: 22.41 ug/l, 7/30/96: 15.75 ug/l, 8/20/97: 15.75 ug/l, 7/29/98: 22.41 ug/l;

Guideline Reference:

Spatial Representation:

Temporal Representation:

The samples were taken on the following dates: 6/8/94, 8/16/94, 6/6/95, 8/14/95, 7/30/96, 8/20/97, 7/29/98.

Environmental Conditions:

The samples were collected 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	73588	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

Pollutant:	Sodium
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 (1) line of evidence are available in the administrative record to assess this pollutant. Five (5) 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. Five (5) of one hundred forty-three (143) 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 73588, Sodium	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

7959

Pollutant:

Sodium

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

143

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Of the 143 samples five exceeded the Basin Plan's objective.

Data Reference:

Water Quality Control Plan for the Santa Ana River Basin

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Santa Ana Region's Basin Plan Objective: 110 mg/l
Please note that the Basin Plan does not have specific criteria for sodium in this reach and that the sodium criteria for the Santa Ana River Reach 3 was used to determine exceedances per the tributary rule.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at one station in Cucamonga Creek Near Mira Loma.

Temporal Representation:

The samples were collected multiple times during the month for a period of several years beginning with 6/20/2000 through 2/21/2007.

Environmental Conditions:

QAPP Information:

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

QAPP Information Reference(s):


DECISION ID	73868	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

Pollutant:	Sulfates \| 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:	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 one hundred forty-one samples for sulfate and none of forty-three samples for total nitrogen exceeded the Basin Plan Objectives 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 73868, Multiple Pollutants	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

7968

Pollutant:

Sulfates

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

141

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Of the 141 samples collected none exceeded the Basin Plan's objective. Please note that the Basin Plan does not have specific criteria for sulfates in this reach and that the sulfates criteria for the Santa Ana River Reach 3 was used to determine exceedances per the tributary rule.

Data Reference:

Water Quality Control Plan for the Santa Ana River Basin

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Santa Ana Region's Basin Plan Objective: 150 mg/l

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at one station in Cucamonga Creek Near Mira Loma.

Temporal Representation:

The samples were collected once and twice per month for a period of several years beginning with 6/20/2000 through 2/21/2007.

Environmental Conditions:

QAPP Information:

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

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 73868, Multiple Pollutants	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

7975

Pollutant:

Total Nitrogen as N

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Of the 43 samples collected none exceeded the Basin Plan's objective.

Data Reference:

Water Quality Control Plan for the Santa Ana River Basin

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Santa Ana Region's Basin Plan Objective: 10 mg/lPlease note that the Basin Plan does not have specific criteria for Total Inorganic Nitrogen in this reach and that the Total Inorganic Nitrogen criteria for the Santa Ana River Reach 3 was used to determine exceedances per the tributary rule.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at one station in Cucamonga Creek Near Mira Loma.

Temporal Representation:

The samples were collected multiple times during the month for a period of several years beginning with 4/5/2006 through 2/21/2007

Environmental Conditions:

QAPP Information:

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

QAPP Information Reference(s):


DECISION ID	73543	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

Pollutant:	Total Dissolved Solids
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 (1) line of evidence is available in the administrative record to assess this pollutant. One (1) 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 (1) of one hundred forty (140) 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 73543, Total Dissolved Solids	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

7972

Pollutant:

Total Dissolved Solids

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

140

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Of the 140 samples collected only one exceeded the Basin Plan's objective.

Data Reference:

Water Quality Control Plan for the Santa Ana River Basin

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Santa Ana Region's Basin Plan Objective: 700 mg/l
Please note that the Basin Plan does not have specific criteria for total dissolved solids in this reach and that the total dissolved solids criteria for the Santa Ana River Reach 3 was used to determine exceedances per the tributary rule.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at one station in Cucamonga Creek Near Mira Loma.

Temporal Representation:

The samples were collected multiple times during the month for a period of several years beginning with 6/20/2000 through 2/21/2007.

Environmental Conditions:

QAPP Information:

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

QAPP Information Reference(s):


DECISION ID	77440	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

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. Ten (10) lines of evidence are available in the administrative record to assess this pollutant. Three 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 10 samples collected during the dry weather exceeded the chronic CTR criteria and three (3) of ninety-two (92) samples collected during the wet weather exceeded the CTR acute criteria and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. 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 5998, 5979, 5971, 5962, 6016, 6003, 5974, 25674, and 25662 have been replaced during State Board review. Four lines of evidence are available in the administrative record to assess this pollutant with the CTR chronic criteria. None of 2 samples exceed the CTR criteria during the dry season. Three of 27 first flush samples exceed during the wet season. Three of 27 main program samples exceed during the wet season. 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. Three of 27 wet weather first flush program 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 77440, Cadmium	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

31390

Pollutant:

Cadmium

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

One sample collected did not exceed the CTR chronic criterion. Total metals data were converted to compare with dissolved metals criteria.

This line of evidence replaces LOEs 5979, 5962, 5971, 5974, 25674, 5998, 6003, 6016, 25684, and 25662. 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:

Water Quality Control Plan for the Santa Ana River Basin

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:

Evaluation Guideline:

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

Guideline Reference:

Spatial Representation:

The sample was collected in Mill Creek at Chino.

Temporal Representation:

The sample was collected on 8/16/2005.

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 77440, Cadmium	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

25684

Pollutant:

Cadmium

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Water Quality Control Plan for the Santa Ana River Basin

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Basin Plan objective: The concentrations of toxic pollutants in the water column, sediments, or biota shall not adversely affect beneficial uses.

Objective/Criterion Reference:

Evaluation Guideline:

The California Toxics Rule cadmium criteria is hardness dependent and ranged as follows: cadmium - 2.82 ppb

Guideline Reference:

Spatial Representation:

The sample was taken in Cucamonga Creek near Mira Loma

Temporal Representation:

The sample was taken on 8/16/2005

Environmental Conditions:

The sample was taken during the dry season conditions.

QAPP Information:

The data's quality is deemed acceptable because it was submitted by an NPDES discharger in accordance with its Monitoring and Reporting Requirements.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 77440, Cadmium	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

25674

Pollutant:

Cadmium

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Eight samples were collected and analyzed for Cadmium. But of the 8 samples, 4 were reported as non detect and the detection limit was above the criteria. So only the remaining 4 samples that had a detection limit below the criteria were used for the assessment. Of the 4 samples taken, none exceeded the CTR criteria listed above. This data was obtained from the self monitoring reports submitted by San Bernardino County Flood Control District Storm Water Program. The cadmium data was reported as total recoverable. In order to compare it to a dissolved metals acute criterion, the concentrations reported were multiplied by a total to dissolved ratio of 2.6 that is site specific for the Santa Ana River and its tributaries. A direct comparison of the data without this adjustment would have resulted in several exceedances resulting in the unnecessary need to list this waterbody for cadmium.

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 chronic criteria. This criteria changes based on the hardness. as follows: cadmium - 6/8/94: 6.82 ug/l, 8/16/94: 10.71 ug/l, 11/1/94: 6.50 ug/l, 6/6/95: 9.76 ug/l, 8/14/95: 13.45 ug/l, 7/30/96: 6.07 ug/l, 8/20/97: 11.56 ug/l, 7/29/98: 12.70 ug/l.

Guideline Reference:

Spatial Representation:

Temporal Representation:

The samples were taken on the following dates: 6/8/94, 8/16/94, 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 77440, Cadmium	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

5974

Pollutant:

Cadmium

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Of the 7 samples taken, all were reported as non detect and the detection limit was above the criteria so none of the samples were used in the assessment. 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): cadmium 6/8/94: 8.99 ug/l, 8/16/94: 8.16 ug/l, 11/1/94: 7.41 ug/l, 6/6/95: 8.16 ug/l, 8/14/95: 7.03 ug/l, 7/30/96: 7.14 ug/l, 8/20/97: 7.14 ug/l, 7/29/98: 6.60 ug/l.

Guideline Reference:

Spatial Representation:

Temporal Representation:

The 7 samples were taken on 6/8/1994
8/16/1994, 11/1/1994, 6/6/1995, 8/14/1995, 7/30/1996, 8/20/1997, 7/29/1998

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 77440, Cadmium	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

5962

Pollutant:

Cadmium

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm 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, one exceeded the CTR standard listed. This data was obtained from the self monitoring reports submitted by San Bernardino County Flood Control District Storm Water Program. The cadmium data was reported as total recoverable. In order to compare it to a dissolved metals acute criterion, the concentrations reported were multiplied by a total to dissolved ratio of 2.6 that is site specific for the Santa Ana River and its tributaries. A direct comparison of the data without this adjustment would have resulted in several exceedances resulting in the need to list this waterbody.

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 acute criteria, which varies according to hardness, was used in determining compliance. The data set included more than 7 samples. A few of these were non detect. However, the detection limit for several of these dates was higher than the criteria. The non detect results for all but 7 entries were the only ones considered during the data analyses.

Guideline Reference:

Spatial Representation:

Temporal Representation:

The samples were taken on the following dates: 3/19/94, 11/10/94, 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. However, since the detection limit was higher than the criteria, only 7 of the samples were considered for the data analyses and this listing.

Environmental Conditions:

The samples were collected in the wet weather's first flush.

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 77440, Cadmium	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

6003

Pollutant:

Cadmium

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Thirty-seven samples were collected and analyzed for cadmium but of these only 22 were used for the assessment because the remaining samples were reported as non detect and the detection limit was below the CTR criteria. Of the 22 samples taken, none exceeded the CTR standard listed. This data was obtained from the self monitoring reports submitted by San Bernardino County Flood Control District Storm Water Program. The cadmium data was reported as total recoverable. In order to compare it to a dissolved metals acute criterion, the concentrations reported were multiplied by a total to dissolved ratio of 2.6 that is site specific for the Santa Ana River and its tributaries. A direct comparison of the data without this adjustment would have resulted in several exceedances resulting in the need to list this waterbody.

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.

Guideline Reference:

Spatial Representation:

Temporal Representation:

The samples were taken monthly since 1994 through 2004.

Environmental Conditions:

The samples were collected in 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 77440, Cadmium	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

5971

Pollutant:

Cadmium

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm 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, 1 exceeded the acute CTR criteria. This data was obtained from the self monitoring reports submitted by San Bernardino County Flood Control District Storm Water Program. The cadmium data was reported as total recoverable. In order to compare it to a dissolved metals acute criterion, the concentrations reported were multiplied by a total to dissolved ratio of 2.6 that is site specific for the Santa Ana River and its tributaries. A direct comparison of the data without this adjustment would have resulted in several exceedances resulting in the unnecessary need to list this waterbody for cadmium.

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 (this criteria varies according to hardness as follows): cadmium: 3/19/94: 1.61 ug/l, 11/10/94: 12.07 ug/l, 1/23/95: 1.84 ug/l, 3/10/95: 1.34 ug/l, 1/31/96: 2.02 ug/l, 2/19/96: 9.87 ug/l, 3/4/96: 3.07 ug/l, 3/13/96: 2.88 ug/l, 10/30/96: 12.13 ug/l, 11/21/96: 5.55 ug/l, 12/9/96: 2.21 ug/l, 11/26/97: 2.44 ug/l, 1/9/98: 0.99 ug/l, 2/3/98: 1.03 ug/l, 3/25/98: 6.60 ug/l, 12/24/03: 114.0 ug/l, 2/2/04: 41.21 ug/l, 2/18/04: 35.51 ug/l.

Guideline Reference:

Spatial Representation:

Temporal Representation:

Environmental Conditions:

The samples were collected in the wet weather's first flush.

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 77440, Cadmium	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

6016

Pollutant:

Cadmium

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Of the 30 samples taken, none exceeded the CTR criteria listed above. This data was obtained from the self monitoring reports submitted by San Bernardino County Flood Control District Storm Water Program. The cadmium data was reported as total recoverable. In order to compare it to a dissolved metals acute criterion, the concentrations reported were multiplied by a total to dissolved ratio of 2.6 that is site specific for the Santa Ana River and its tributaries. A direct comparison of the data without this adjustment would have resulted in several exceedances resulting in the unnecessary need to list this waterbody for cadmium.

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 (this criteria varies according to hardness as follows): 3/19/94: 6.55 ug/l, 11/10/94: 7.68 ug/l, 3/10/95: 2.73 ug/l, 12/12/95: 37.25 ug/l, 1/31/96: 5.03 ug/l, 2/19/96: 8.22 ug/l, 3/4/96: 9.32 ug/l, 3/13/96: 5.03 ug/l, 11/21/96: 7.14 ug/l, 12/9/96: 3.36 ug/l, 11/26/97: 3.86 ug/l, 1/9/98: 3.46 ug/l, 2/3/98: 2.97 ug/l, 3/25/98: 6.07 ug/l, 1/25/00: 32.17 ug/l, 1/8/01: 7.14 ug/l, 1/24/01: 6.07 ug/l, 2/23/01: 4.52 ug/l, 4/7/01; 7.68 ug/l, 12/25/03: 5.55 ug/l, 2/2/04: 5.03 ug/l, 2/18/04: 13.85 ug/l.

Guideline Reference:

Spatial Representation:

Temporal Representation:

The samples were collected on: 3/19/94, 11/10/94, 3/10/95, 12/12/95, 1/31/96, 2/19/96, 3/4/96, 3/13/96, 11/21/96, 12/9/96, 11/26/97, 1/9/98, 2/3/98, 3/25/98, 1/25/00, 1/8/01, 1/24/01, 2/23/01, 4/7/01, 12/25/03, 2/2/04, 2/18/04.

Environmental Conditions:

The samples were collected in the wet weather's first flush.

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 77440, Cadmium	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

31354

Pollutant:

Cadmium

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Eighty-nine samples were collected for this data set. Only 27 samples however have results above the criterion or non-detect results with sample detection limits below the criterion. Three of 27 samples exceed the CTR chronic criterion. Total metals data were converted to compare with dissolved metals criteria.

This line of evidence replaces LOEs 5979, 5962, 5971, 5974, 25674, 5998, 6003, 6016, 25684, and 25662. 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 2 - Cucamonga Creek @ Hwy 60 and Site 3 - Cucamonga Creek @ Hellman Ave.

Temporal Representation:

Samples were collected during wet weather conditions from 1994 to 2006 as part of First Flush sampling. A single composite First Flush sample consists of two samples at 1 minute intervals (discarded); then 12 samples at 4 minute intervals.

Environmental Conditions:

Wet weather sampling are collected at 4 or more intervals during the rainy season (October 15 through April 15). Sampling is triggered during storm events that are predicted to yield .25" of rain. At least 72 hours must precede the storm event with no samples collected closer than 2 weeks apart.

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 77440, Cadmium	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

31367

Pollutant:

Cadmium

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Ninety samples were collected for this data set. Only 27 samples however have results above the criterion or non-detect results with sample detection limits below the criterion. Three of 27 samples exceed the CTR chronic criterion. Total metals data were converted to compare with dissolved metals criteria.

This line of evidence replaces LOEs 5998, 5979, 5971, 5962, 6016, 6003, 5974, 25674, and 25662. 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 2 - Cucamonga Creek @ Hwy 60 and Site 3 - Cucamonga Creek @ Hellman Ave.

Temporal Representation:

Samples were collected during wet weather conditions from 1994 to 2006 as part of Main Program composite sampling. Main Program sampling follows First Flush sampling.

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 77440, Cadmium	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

5979

Pollutant:

Cadmium

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Twenty-four samples were collected and analyzed for cadmium but all except for two were reported as non detect and the detection limit was higher than the criteria so only 2 samples were used in the assessment. Of the 2 samples taken, none exceeded the CTR criteria listed. This data was obtained from the self monitoring reports submitted by San Bernardino County Flood Control District Storm Water Program. The cadmium data was reported as total recoverable. In order to compare it to a dissolved metals acute criterion, the concentrations reported were multiplied by a total to dissolved ratio of 2.6 that is site specific for the Santa Ana River and its tributaries. A direct comparison of the data without this adjustment would have resulted in several exceedances resulting in the unnecessary need to list this waterbody for cadmium.

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): cadmium: 2/17/94: 1.12 ug/l, 3/19/94: 0.90 ug/l, 11/10/94: 2.88 ug/l, 3/10/95: 0.78 ug/l, 12/12/95: 13.04 ug/l, 1/31/96: 1.21 ug/l, 2/19/96: 3.91 ug/l, 3/4/96: 2.21 ug/l, 3/13/96; 3.41 ug/l, 10/30/96: 8.77 ug/l, 11/21/96: 1.88 ug/l, 12/9/96: 2.11 ug/l, 11/26/97: 1.52 ug/l, 1/9/98: 1.16 ug/l, 2/3/98: 0.95 ug/l, 3/25/98: 1.29 ug/l.

Guideline Reference:

Spatial Representation:

Temporal Representation:

The samples were taken on the following dates: 2/17/94, 3/19/94, 11/10/94, 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.

Environmental Conditions:

The samples were taken 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 77440, Cadmium	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

25662

Pollutant:

Cadmium

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm 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. This data was obtained from the self monitoring reports submitted by San Bernardino County Flood Control District Storm Water Program. The cadmium data was reported as total recoverable. In order to compare it to a dissolved metals acute criterion, the concentrations reported were multiplied by a total to dissolved ratio of 2.6 that is site specific for the Santa Ana River and its tributaries. A direct comparison of the data without this adjustment would have resulted in several exceedances resulting in the unnecessary need to list this waterbody for cadmium.

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:

The following criteria varies according to hardness: cadmium: 6/8/94: 15.83 ug/l, 8/16/94: 10.26 ug/l, 6/6/95: 13.16 ug/l, 8/14/95: 13.85 ug/l, 7/30/96: 10.99 ug/l, 8/20/97: 10.99 ug/l, 7/29/98: 13.85 ug/l.

Guideline Reference:

Spatial Representation:

Temporal Representation:

The samples were taken on the following dates: 8/16/1994
6/6/1995, 8/14/1995, 7/30/1996, 8/20/1997, 7/29/1998

Environmental Conditions:

The samples were collected 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 77440, Cadmium	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

5998

Pollutant:

Cadmium

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

38 samples were collected and analyzed for cadmium. However, of all the 38 samples, only 11 were used in the assessment because the rest of the samples were reported as non detect and the detection limit was higher than the CTR criteria. Of the 11 samples taken, one exceeded the CTR standard listed. This data was obtained from the self monitoring reports submitted by San Bernardino County Flood Control District Storm Water Program. The cadmium data was reported as total recoverable. In order to compare it to a dissolved metals acute criterion, the concentrations reported were multiplied by a total to dissolved ratio of 2.6 that is site specific for the Santa Ana River and its tributaries. A direct comparison of the data without this adjustment would have resulted in several exceedances resulting in the unnecessary need to list this waterbody for cadmium.

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): cadmium 2/17/94: 0.99 ug/l, 3/19/94: 1.61 ug/l, 11/10/94: 4.77 ug/l, 1/23/95: 0.82 ug/l, 3/10/95: 1.16 ug/l, 1/31/96: 1.21 ug/l, 2/19/96: 6.07 ug/l, 3/4/96: 1.88 ug/l, 3/13/96: 0.78 ug/l, 10/30/96: 17.96 ug/l, 11/21/96: 2.40 ug/l, 12/9/96: 1.93 ug/l, 11/26/97: 2.07 ug/l, 1/9/98: 1.43 ug/l, 2/3/98: 1.25 ug/l, 3/25/98: 3.96 ug/l, 1/25/00: 7.14 ug/l, 1/8/01: 4.52 ug/l, 1/24/01: 1.84 ug/l, 2/23/01: 0.82 ug/l, 4/7/01: 1.07 ug/l, 12/24/03: 5.03 ug/l, 2/2/04: 3.61 ug/l, 2/18/04: 1.70 ug/l.

Guideline Reference:

Spatial Representation:

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, 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, 1/8/01, 1/24/01, 2/23/01, 4/7/01, 12/24/03, 2/2/04, 2/18/04.

Environmental Conditions:

The samples were taken 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	74065	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

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. : 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. Nine lines of evidence are available in the administrative record to assess this pollutant. One hundred thirty-six (136) of the samples exceed the acute CTR criteria during the wet season. Two (2) out of 23 samples exceed the chronic CTR criteria during the dry season. 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. One hundred thirty-six (136) of one hundred ninety-one (191) samples exceed the California Toxics Rule acute criteria and 2 out of 23 samples exceed the 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. The CTR metals criteria, which are the applicable basis for impairment assessment, are expressed in the dissolved form. However, the metals data available for the Santa Ana River and its tributaries are in the total recoverable form. To convert the data to the dissolved form for comparison to the CTR criteria, total-dissolved translators developed for the Santa Ana River and its tributaries as part of use attainability analyses conducted in the early 1990¿s were employed (for cadmium and copper, the translator is 2.6; for lead, the translator is 6.1). These translators have been employed since their development in the early 1990¿s, together with the CTR metals criteria, to develop total recoverable effluent limitations for these metals in NPDES permits issued to POTWs that discharge to the River and its tributaries. The River/tributaries are effluent dominated: most of the flow in this system is comprised of treated municipal wastewater. It is thus reasonable and appropriate to apply the established translators to the conversion of ambient total recoverable metals data to dissolved values for comparison to the CTR criteria. State Water Board Decision Recommendation (prior to USEPA approval): The April 19, 2010 State Water Board staff report for the 2010 Integrated Report recommended to place this water body on the 303(d) list for copper based on the re-evaluation of the data using different data translators: In the original Regional Board assessment, staff translated the total recoverable copper data to the dissolved form for comparison to the CTR criteria using total-dissolved translators developed for the Santa Ana River and its tributaries as part of use attainability analyses conducted in the early 1990's. For cadmium and copper, the translator is 2.6; for lead, the translator is 6.1. State Water Board staff re-evaluated the copper data using a default CTR translator to translate the data from total recoverable to dissolved copper. This is because the translators developed for the Use Attainability Analysis in the 1990's were superseded in 2000 by the federal promulgation of the California Toxics Rule. In addition, the 1990 translator was approved by USEPA for use with effluent data in NPDES permits only. As a result of the re-evaluation, there are 5 new LOEs that replace the original group of LOEs. The original LOEs were: 5978, 5997, 5965, 6001, 5965, 5970, 6004, 5975, 25663, and 25675. The revised recommendation is: 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. Five lines of evidence are available in the administrative record to assess this pollutant. Eight of 18 samples exceed the CTR criteria during the dry season. Seventy-five of 79 first flush samples exceed during the wet season. Eighty of 86 main program samples exceed during the wet season. 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. Seventy-five of 79 wet weather first flush samples exceed the California Toxics Rule chronic criteria and this exceeds the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. At the June 15, 2010 State Water Board meeting for approval of the 2010 Integrated Report, the State Water Board directed staff to reevaluate the listing recommendation for this water body-pollutant combination. Based on this reevaluation, State Water Board staff continued to recommend placing this water body on the 303(d) list for copper. At the August 4, 2010 State Water Board's follow-up Board meeting for approval of the 2010 Integrated Report, the State Water Board did not approve the State Water Board staff recommendation to evaluate these data using CTR translators.

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 Water Board Decision Recommendation (prior to USEPA approval): The April 19, 2010 State Water Board staff report for the 2010 Integrated Report recommended to place this water body on the 303(d) list for copper based on the re-evaluation of the data using different data translators: In the original Regional Board assessment, staff translated the total recoverable copper data to the dissolved form for comparison to the CTR criteria using total-dissolved translators developed for the Santa Ana River and its tributaries as part of use attainability analyses conducted in the early 1990's. For cadmium and copper, the translator is 2.6; for lead, the translator is 6.1. State Water Board staff re-evaluated the copper data using a default CTR translator to translate the data from total recoverable to dissolved copper. This is because the translators developed for the Use Attainability Analysis in the 1990's were superseded in 2000 by the federal promulgation of the California Toxics Rule. In addition, the 1990 translator was approved by USEPA for use with effluent data in NPDES permits only. As a result of the re-evaluation, there are 5 new LOEs that replace the original group of LOEs. The original LOEs were: 5978, 5997, 5965, 6001, 5965, 5970, 6004, 5975, 25663, and 25675. The revised recommendation is: 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. Five lines of evidence are available in the administrative record to assess this pollutant. Eight of 18 samples exceed the CTR criteria during the dry season. Seventy-five of 79 first flush samples exceed during the wet season. Eighty of 86 main program samples exceed during the wet season. 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. Seventy-five of 79 wet weather first flush samples exceed the California Toxics Rule chronic criteria and this exceeds the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. At the June 15, 2010 State Water Board meeting for approval of the 2010 Integrated Report, the State Water Board directed staff to reevaluate the listing recommendation for this water body-pollutant combination. Based on this reevaluation, State Water Board staff continued to recommend placing this water body on the 303(d) list for copper. At the August 4, 2010 State Water Board's follow-up Board meeting for approval of the 2010 Integrated Report, the State Water Board did not approve the State Water Board staff recommendation to evaluate these data using CTR translators.

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 74065, Copper	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

25663

Pollutant:

Copper

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Of the 7 samples taken, one exceeded the CTR criteria. This data was analyzed using the total to dissolved ratio translators that were derived from the Use Attainability Analyses for the Santa Ana River and its tributaries. This data was obtained from the self monitoring reports submitted by San Bernardino County Flood Control District Storm Water Program.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: The following criteria varies according to hardness: copper: 6/8/94: 39.91 ug/l, 8/16/94: 27.78 ug/l, 6/6/95: 34.14 ug/l, 8/14/95: 35.69 ug/l, 7/30/96: 29.43 ug/l, 8/20/97: 29.43 ug/l, 7/29/98: 35.69 ug/l.

Guideline Reference:

Spatial Representation:

Temporal Representation:

The samples were taken on the following dates: 6/8/94, 8/16/94, 6/6/95, 8/14/95, 7/30/96, 8/20/97, 7/29/98.

Environmental Conditions:

The samples were collected 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 74065, Copper	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

31353

Pollutant:

Copper

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Eighty-six samples were collected for this data set. Only 79 samples however have results above the criterion or non-detect results with sample detection limits below the criterion. Seventy-five of 79 samples exceed 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 5 new LOEs that replace the original group of LOEs. The original LOEs were: 5978, 5997, 5965, 6001, 5965, 5970, 6004, 5975, 25663, and 25675.

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 2 - Cucamonga Creek @ Hwy 60 and Site 3 - Cucamonga Creek @ Hellman Ave.

Temporal Representation:

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 74065, Copper	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

31356

Pollutant:

Copper

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Eight of 16 samples exceed 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 5 new LOEs that replace the original group of LOEs. The original LOEs were: 5978, 5997, 5965, 6001, 5965, 5970, 6004, 5975, 25663, and 25675.

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 2 - Cucamonga Creek @ Hwy 60 and Site 3 - Cucamonga Creek @ Hellman Ave.

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 74065, Copper	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

31357

Pollutant:

Copper

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

One sample collected did not exceed 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 5 new LOEs that replace the original group of LOEs. The original LOEs were: 5978, 5997, 5965, 6001, 5965, 5970, 6004, 5975, 25663, and 25675.

Data Reference:

Water Quality Control Plan for the Santa Ana River Basin

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:

Evaluation Guideline:

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

Guideline Reference:

Spatial Representation:

The sample was collected in Cucamonga Creek near Mira Loma

Temporal Representation:

The sample was collected on 8/16/2005.

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 74065, Copper	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

31388

Pollutant:

Copper

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Water Quality Control Plan for the Santa Ana River Basin

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:

Evaluation Guideline:

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

Guideline Reference:

Spatial Representation:

The sample was collected in Mill Creek at Chino.

Temporal Representation:

The sample was collected on 8/16/2005.

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 74065, Copper	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

6001

Pollutant:

Copper

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Of the 33 samples taken, 15 exceeded the CTR criteria. This data was analyzed using the total to dissolved ratio translators that were derived from the Use Attainability Analyses for the Santa Ana River and its tributaries. This data was obtained from the self monitoring reports submitted by San Bernardino County Flood Control District Storm Water Program. 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): 3/19/94: 19.09 ug/l, 11/10/94: 21.8 ug/l, 1/23/95: 41.02 ug/l, 3/10/95: 9.19 ug/l, 12/12/95: 81.54 ug/l, 1/31/96: 15.31 ug/l, 2/19/96: 23.08 ug/l, 3/4/96: 25.63 ug/l, 3/13/96: 15.31 ug/l, 11/21/96: 20.51 ug/l, 12/9/96: 10.94 ug/l, 11/26/97: 12.28 ug/l, 1/9/98:11.21 ug/l, 2/3/98: 9.87 ug/l, 3/25/98: 17.92 ug/l, 12/25/03: 16.6 ug/l, 2/2/04: 15.3 ug/l, 2/18/04: 35.7 ug/l.

Guideline Reference:

Spatial Representation:

Temporal Representation:

The samples were taken monthly starting on 2/17/1994 through 2/18/2004.

Environmental Conditions:

The samples were collected in the wet weather's first flush.

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 74065, Copper	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

5978

Pollutant:

Copper

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Of the 23 samples taken, 16 exceeded the CTR criteria. This data was analyzed using the total to dissolved ratio translators that were derived from the Use Attainability Analyses for the Santa Ana River and its tributaries. This data was obtained from the self monitoring reports submitted by San Bernardino County Flood Control District Storm Water Program. 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: 4.36 ug/l, 3/19/94: 3.65 ug/l, 11/10/94: 9.6 ug/l, 3/10/95: 3.22 ug/l, 12/12/95: 33.94 ug/l, 1/31/96: 4.64 ug/l, 2/19/96: 12.41 ug/l, 3/4/96: 7.7 ug/l, 3/13/96: 11.08 ug/l, 10/30/96: 24.36 ug/l, 11/21/96: 6.74 ug/l, 12/9/96: 7.42 ug/l, 11/26/97: 5.63 ug/l, 1/9/98: 4.50 ug/l, 2/3/98: 3.79 ug/l, 3/25/98: 4.93 ug/l.

Guideline Reference:

Spatial Representation:

Temporal Representation:

The samples were taken on the following dates: monthly starting with 2/17/94 through 4/17/2000.

Environmental Conditions:

The samples were taken 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 74065, Copper	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

5997

Pollutant:

Copper

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Of the 36 samples taken, all 32 exceeded the CTR criteria. This data was assessed using the total to dissolved ratio translators that were derived from the Use Attainability Analyses for the Santa Ana River and its tributaries. 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: 3.93 ug/l, 3/19/94: 5.90 ug/l, 11/10/94: 14.66 ug/l, 1/23/95: 3.36 ug/l, 3/10/95: 4.50 ug/l, 1/31/96: 4.64 ug/l, 2/19/96: 17.92 ug/l, 3/4/96: 6.74 ug/l, 3/13/96: 3.22 ug/l, 10/30/96: 44.35 ug/l, 11/21/96: 8.24 ug/l, 12/9/96: 6.87 ug/l, 11/26/97: 7.29 ug/l, 1/9/98: 5.35 ug/l, 2/3/98: 4.78 ug/l, 3/25/98: 12.54 ug/l, 12/24/03: 15.31 ug/l, 2/2/04: 11.61 ug/l, 2/18/04: 6.18 ug/l.

Guideline Reference:

Spatial Representation:

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, 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, 12/24/03, 2/2/04, 2/18/04.

Environmental Conditions:

The samples were taken 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 74065, Copper	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

6004

Pollutant:

Copper

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm 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 taken, 18 exceeded the CTR criteria. This data was analyzed using the total to dissolved ratio translators that were derived from the Use Attainability Analyses for the Santa Ana River and its tributaries. This data was obtained from the self monitoring reports submitted by San Bernardino County Flood Control District Storm Water Program.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: 9.46 ug/l, 3/19/94: 9.19 ug/l, 11/10/94: 13.21 ug/l, 1/23/95: 55.09 ug/l, 3/10/95: 7.83 ug/l, 12/12/95: 35.19 ug/l, 1/31/96: 19.22 ug/l, 2/19/96: 16.62 ug/l, 3/4/96: 21.8 ug/l, 3/13/96: 15.31 ug/l, 11/21/96: 10.68 ug/l, 12/9/96: 9.73 ug/l, 11/26/97: 8.24 ug/l, 1/9/98: 10.94 ug/l, 2/3/98: 7.70 ug/l, 3/25/98: 20.51 ug/l, 12/25/03: 11.08 ug/l, 2/3/04: 24.36 ug/l, 2/19/04: 13.86 ug/l.

Guideline Reference:

Spatial Representation:

Temporal Representation:

The samples were taken monthly starting with : 2/17/94 through 2/19/04.

Environmental Conditions:

The samples were taken 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 74065, Copper	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

5965

Pollutant:

Copper

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Of the 23 samples taken, 20 exceeded the CTR criteria. This data was analyzed using the total to dissolved ratio translators that were derived from the Use Attainability Analyses for the Santa Ana River and its tributaries. This data was obtained from the self monitoring reports submitted by San Bernardino County Flood Control District Storm Water Program. 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 .

Guideline Reference:

Spatial Representation:

Temporal Representation:

The samples were taken monthly starting on 6/8/1994 through 7/29/1998.

Environmental Conditions:

The samples were collected in the wet weather's first flush.

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 74065, Copper	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

5970

Pollutant:

Copper

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Of the 37 samples taken, 35 exceeded the CTR criteria. This data was analyzed using the total to dissolved ratio translators that were derived from the Use Attainability Analyses for the Santa Ana River and its tributaries. This data was obtained from the self monitoring reports submitted by San Bernardino County Flood Control District Storm Water Program. 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.

Guideline Reference:

Spatial Representation:

Temporal Representation:

The samples were taken monthly starting with 2/17/1994 through 2/18/2004.

Environmental Conditions:

The samples were collected in the wet weather's first flush.

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 74065, Copper	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

5975

Pollutant:

Copper

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm 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 taken, 1 exceeded the CTR criteria. This data was analyzed using the total to dissolved ratio translators that were derived from the Use Attainability Analyses for the Santa Ana River and its tributaries. This data was obtained from the self monitoring reports submitted by San Bernardino County Flood Control District Storm Water Program.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): 6/8/94: 24.87 ug/l, 8/16/94: 22.95 ug/l, 11/1/94: 21.16 ug/l, 6/6/95: 22.95 ug/l, 8/14/95: 20.25 ug/l, 7/30/96: 20.51 ug/l, 8/20/97: 20.51 ug/l, 7/29/98: 19.74 ug/l.

Guideline Reference:

Spatial Representation:

Temporal Representation:

The 7 samples were taken monthly starting on 6/8/94 through 7/29/1998.

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 74065, Copper	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

25675

Pollutant:

Copper

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm 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 taken, none exceeded the CTR criteria. This data was analyzed using the total to dissolved ratio translators that were derived from the Use Attainability Analyses for the Santa Ana River and its tributaries. This data was obtained from the self monitoring reports submitted by San Bernardino County Flood Control District Storm Water Program.

Data Reference:

Final Data File used for assessment: ESNERR (Elkhorn Slough National Reserve) Water Quality Data from 2006

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: the criteria for varies according to hardness as follows: Copper: 6/8/94: 19.74 ug/l, 8/16/94: 28.8 ug/l, 11/1/94: 18.96 ug/l, 6/6/95: 26.65 ug/l, 8/14/95: 34.82 ug/l, 7/30/96: 17.92 ug/l, 8/20/97: 30.68 ug/l, 7/29/98: 33.19 ug/l.

Guideline Reference:

Spatial Representation:

Temporal Representation:

The samples were taken on the following dates: 6/8/94, 8/16/94, 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 74065, Copper	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

31351

Pollutant:

Copper

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Eighty-nine samples were collected for this data set. Only 80 samples however have results above the criterion or non-detect results with sample detection limits below the criterion. Eighty of 86 samples exceed 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 5 new LOEs that replace the original group of LOEs. The original LOEs were: 5978, 5997, 5965, 6001, 5965, 5970, 6004, 5975, 25663, and 25675.

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 2 - Cucamonga Creek @ Hwy 60 and Site 3 - Cucamonga Creek @ Hellman Ave.

Temporal Representation:

Samples were collected during wet weather conditions from 1994 to 2006 as part of Main Program composite sampling. Main Program sampling follows First Flush sampling.

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	78536	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

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 Cucamonga Creek Reach 1 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 79 samples, 76 exceeded the CTR criteria. An additional 54 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 3644, titled "USEPA data summary for Cucamonga Creek Reach 1 for adding lead to California 2010 303(d) list ".

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 3644, titled "USEPA data summary for Cucamonga Creek Reach 1 for adding lead to California 2010 303(d) list ".

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 78536, Lead	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

5917

Pollutant:

Lead

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm 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:

California Toxics Rule Aquatic Life (this criteria varies according to hardness as follows): 2/17/94: 14.7 ug/l, 3/19/94: 25.43 ug/l, 11/10/94: 88.88 ug/l, 1/23/95: 11.88 ug/l, 3/10/95: 17.63 ug/l, 1/31/96: 18.38 ug/l, 2/19/96: 114.02 ug/l, 3/4/96: 30.38 ug/l, 3/13/96: 11.20 ug/l, 10/30/96: 387.71 ug/l, 11/21/96: 39.92 ug/l, 12/9/96: 31.23 ug/l, 11/26/97: 33.78 ug/l, 1/9/98: 22.24 ug/l, 2/3/98: 19.14 ug/l, 3/25/98: 70.39 ug/l, 12/24/03: 92.17 ug/l, 2/2/04: 63.42 ug/l, 2/18/04: 27.06 ug/l.

Guideline Reference:

Spatial Representation:

Temporal Representation:

Environmental Conditions:

The samples were taken 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 78536, Lead	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

25661

Pollutant:

Lead

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Of the 15 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): 3/19/94: 35.51 ug/l, 11/10/94: 275.54 ug/l, 3/10/95: 6.68 ug/l, 12/12/95: 860 ug/l, 1/31/96: 35.51 ug/l, 2/19/96: 148.52 ug/l, 3/4/96: 28.71 ug/l, 3/13/96: 26.24 ug/l, 10/30/96: 682.23 ug/l, 11/21/96: 72.41 ug/l, 12/9/96: 48.11 ug/l, 11/26/97: 51.85 ug/l, 1/9/98: 12.57 ug/l, 2/3/98: 14.70 ug/l, 3/25/98: 19.91 ug/l.

Guideline Reference:

Spatial Representation:

The 15 samples were collected at the Baseline Road at Alta Cuesta Avenue. The samples were collected from one gauging station 20 feet south of Baseline Road on the west side of Cucamonga Creek Channel in the City of Rancho Cucamonga.

Temporal Representation:

The samples were collected on: 3/19/94, 11/10/94, 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.

Environmental Conditions:

The samples were collected in the wet weather's first flush.

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 78536, Lead	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

31352

Pollutant:

Lead

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Forty-four samples were collected for this data set. Only 29 samples however have results above the criterion or non-detect results with sample detection limits below the criterion. All 29 samples exceed 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 5 new LOEs that replace the original group of LOEs. The original LOEs were: 5917, 5933, 25661, and 5916.

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 2 - Cucamonga Creek @ Hwy 60.

Temporal Representation:

Samples were collected during wet weather conditions from 1994 to 2006 as part of Main Program composite sampling. Main Program sampling follows First Flush sampling.

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 78536, Lead	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

31391

Pollutant:

Lead

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Water Quality Control Plan for the Santa Ana River Basin

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:

Evaluation Guideline:

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

Guideline Reference:

Spatial Representation:

The sample was collected in Mill Creek at Chino.

Temporal Representation:

The sample was collected on 8/16/2005.

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 78536, Lead	Region 8
Cucamonga Creek Reach 1 (Valley Reach)

LOE ID:

31389

Pollutant:

Lead

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference: