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

Supporting Information

Regional Board 8 - Santa Ana Region

Water Body Name:	City Creek
Water Body ID:	CAR8015200020080714143541
Water Body Type:	River & Stream


DECISION ID	12736

Pollutant:	Arsenic \| Copper \| Iron \| Lead \| Mercury \| Selenium \| Zinc
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant

Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. 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 six (6) samples exceeded the California Toxics Rule and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.

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

SWRCB Board Decision / Staff Recommendation:

USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 12736


LOE ID:	5769

Pollutant:	Arsenic \| Copper \| Iron \| Lead \| Mercury \| Selenium \| Zinc
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total

Beneficial Use:	Wildlife Habitat

Number of Samples:	6
Number of Exceedances:	0

Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Of the 6 samples collected, none exceeded the standards/guidelines.
Data Reference:	San Bernardino County Flood Control District data from storm water program.

Water Quality Objective/Criterion:	Santa Ana Region's Basin Plan narrative objective: The concentrations of toxic pollutants in the water column, sediments, or biota shall not adversely affect beneficial uses.
Objective/Criterion Reference:	Water Quality Control Plan-Santa Ana Region

Evaluation Guideline:	CTR aquatic life: Arsenic 4-day avg. 150 ug/l, and 1-hr avg. 340 ug/l; the hardness dependent metals are as follows: Copper on 11/1/94: 14.92 ug/l, 6/6/95: 11.08 ug/l, 8/14/95: 12.68 ug/l, 7/30/96: 17.92 ug/l, 8/20/97: 20.51 ug/l, 7/29/98: 11.48 ug/l. Lead: 11/1/94: 88.99 ug/l, 6/6/95: 59.51 ug/l, 8/14/95: 71.40 ug/l, 7/30/96: 114.02 ug/l, 8/20/97: 136.80 ug/l, 7/29/98: 62.44 ug/l. Zinc: 11/1/94: 126.89 ug/l, 6/6/95: 97.07 ug/l, 8/14/95: 109.58 ug/l, 7/30/96: 149.64 ug/l, 8/20/97: 169.93 ug/l, 7/29/98: 100.22 ug/l. NTR aquatic life: Selenium 4-day avg. 5 ug/l and 1-hr avg. 20 ug/l. USEPA National Ambient Water Quality Criteria Toxicity: Iron 4-day avg. 1,000 ug/l and Mercury 1-hr avg. 1.4 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 6 samples were collected at one station on City Creek 2.7 miles north of Highland Avenue (north of mile post 32.35) at City Creek Bridge; at 1/4 mile d/s of confluence of West and East Forks of City Creek. Four hundred thirty five feet east of Highway 330.
Temporal Representation:	The 6 samples were taken on 11/1/1994, 6/6/1995, 8/14/1995, 7/30/1996, 8/20/1997, 7/29/1998.
Environmental Conditions:	the samples were collected as grab samples in the dry weather
QAPP Information:	The datas quality is deemed appropriate because it originated from an NPDES discharger in compliance with their monitoring and reporting program requirements.
QAPP Information Reference(s):


DECISION ID	12770

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

Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. 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 eighteen (18) samples exceeded the California Toxics Rule and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.

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

SWRCB Board Decision / Staff Recommendation:

USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 12770


LOE ID:	5770

Pollutant:	Arsenic \| Mercury
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total

Beneficial Use:	Wildlife Habitat

Number of Samples:	18
Number of Exceedances:	0

Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Of the 18 samples collected in the water column, none exceeded the standards.
Data Reference:	San Bernardino County Flood Control District data from storm water program.

Water Quality Objective/Criterion:	Santa Ana Region's Basin Plan Narrative Objective: The concentrations of toxic pollutants in the water column, sediments, or biota shall not adversely affect beneficial uses.
Objective/Criterion Reference:	Water Quality Control Plan-Santa Ana Region

Evaluation Guideline:	CTR Aquatic Life: Arsenic 4-day avg. 150 ug/l and 1-hr avg. 340 ug/l; U.S. EPA National Ambient Water Quality Criteria Toxicity: Mercury 1-hr avg. 1.4 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 18 samples were collected at one station on City Creek, 2.7 miles north of Highland Avenue (north of mile post 32.35) at City Creek Bridge; at 1/4 mile directly south of confluence of West and East Forks of City Creek; 435 feet East of Highway 330.
Temporal Representation:	The 18 samples were taken on 2/17/94, 3/17/94, 11/10/94, 1/23/94, 3/10/95, 12/12/95, 1/31/96, 2/19/1986, 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
Environmental Conditions:	the samples were obtained as grab samples during the wet weather
QAPP Information:	The datas quality is deemed appropriate because it originated from an NPDES discharger in compliance with their monitoring and reporting program requirements.
QAPP Information Reference(s):


DECISION ID	12795

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

Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Two lines of evidence are available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of twenty-three of the samples exceeded the US EPA National Recommended Ambient Water Quality Criteria for Fresh Water Aquatic Life protection Maximum Concentration and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.

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

SWRCB Board Decision / Staff Recommendation:

USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 12795


LOE ID:	5776

Pollutant:	Chloride
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None

Beneficial Use:	Wildlife Habitat

Number of Samples:	6
Number of Exceedances:	0

Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Of the 6 samples collected, none exceeded the standards/guidelines listed above.
Data Reference:	Compilation of Water Quality Goals

Water Quality Objective/Criterion:	Santa Ana Region's Basin Plan Narrative Objective: The concentrations of toxic pollutants in the water column, sediments, or biota shall not adversely affect beneficial uses.
Objective/Criterion Reference:	Water Quality Control Plan-Santa Ana Region

Evaluation Guideline:	US EPA National Recommended Ambient Water Quality Criteria Freshwater Aquatic Life Protection Maximum Concentration 1-hr average: 860 mg/l
Guideline Reference:	National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Office of Science and Technology. 4304T

Spatial Representation:	The 6 samples were collected at one station on City Creek, 2.7 miles north of Highland Ave (north of mile post 32.35) at City Creek Bridge; at 1/4 mile directly south of confluence of West and East Forks of City Creek and 435 feet east of Highway 330.
Temporal Representation:	The 6 samples were taken on 11/1/94, 1/6/95, 8/14/95, 7/30/96, 8/20/97, 7/29/98.
Environmental Conditions:	The samples were taken as grab during the dry weather.
QAPP Information:	The datas quality is deemed appropriate because it originated from an NPDES discharger in compliance with their monitoring and reporting program requirements.
QAPP Information Reference(s):


LOE ID:	5783

Pollutant:	Chloride
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None

Beneficial Use:	Wildlife Habitat

Number of Samples:	17
Number of Exceedances:	0

Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Of the 17 samples collected, none exceeded the standards. This data was obtained from the self monitoring reports submitted by San Bernardino County Flood Control District for their sewage treatment plant.
Data Reference:	San Bernardino County Flood Control District data from storm water program.

Water Quality Objective/Criterion:	Santa Ana Region's Basin Plan Narrative Objective: The concentrations of toxic pollutants in the water column, sediments, or biota shall not adversely affect beneficial uses.
Objective/Criterion Reference:	Water Quality Control Plan-Santa Ana Region

Evaluation Guideline:	US EPA National Recommended Ambient Water Quality Criteria for Freshwater Aquatic LIfe Protection Maximum Concentration (1-hr avg) 860 mg/l
Guideline Reference:	National Recommended Water Quality Criteria. United States Environmental Protection Agency. Office of Water. Office of Science and Technology. 4304T

Spatial Representation:	The 17 samples were collected at one station on City Creek 2.7 miles north of Highland Ave. (north of mile post 32.35) at City Creek Bridge; at 1/4 mile directly south of confluence of West and East Forks of City Creek and 435 feet east of Highway 330.
Temporal Representation:	The 17 samples were collected on 2/17/94, 3/17/94, 11/10/94, 1/23/95, 3/10/95, 12/12/95, 1/31/96, 2/19/86, 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 as grabs during the wet weather.
QAPP Information:	The datas quality is deemed appropriate because it originated from an NPDES discharger in compliance with their monitoring and reporting program requirements.
QAPP Information Reference(s):


DECISION ID	12800

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

Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. 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 seventeen (17) samples exceeded the California Toxics Rule and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.

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

SWRCB Board Decision / Staff Recommendation:

USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 12800


LOE ID:	5772

Pollutant:	Copper \| Iron \| Lead \| Selenium \| Zinc
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total

Beneficial Use:	Wildlife Habitat

Number of Samples:	17
Number of Exceedances:	0

Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Of the 17 samples collected, none exceeded the standards/guidelines.
Data Reference:	San Bernardino County Flood Control District data from storm water program.

Water Quality Objective/Criterion:	Santa Ana Region's Basin Plan Narrative Objective: The concentrations of toxic pollutants in the water column, sediments, or biota shall not adversely affect beneficial uses.
Objective/Criterion Reference:	Water Quality Control Plan-Santa Ana Region
	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency

Evaluation Guideline:	California Toxics Rule Aquatic Life: Copper: 2/17/94: 12.68 ug/l, 3/19/94: 13.47 ug/l, 11/10/94: 16.10 ug/l, 1/23/95: 10.54 ug/l, 3/10/95: 8.24 ug/l 12/12/95 13.6 ug/l, 1/31/96: 12.68 ug/l, 2/19/96: 9.33 ug/l, 3/4/96: 11.61 ug/l, 3/13/96: 11.61 ug/l, 3/13/96: 11.61 ug/l, 10/30/96: 17.92 ug/l, 11/21/96: 16.62 ug/l, 12/9/96: 15.31 ug/l, 11/26/97: 179.56 ug/l, 1/9/98: 16.62 ug/l, 2/3/98: 15.31 ug/l, 3/25/98: 10.41 ug/l; Lead 2/17/94: 71.4 ug/l, 3/19/94: 77.51 ug/l, 11/10/94: 98.62 ug/l, 1/23/95: 55.65 ug/l, 3/10/95 39.92 ug/l, 12/12/95: 78.54 ug/l, 1/31/96: 71.40 ug/l, 2/19/96 ug/l: 47.18 ug/l, 3/4/96: 63.42 ug/l, 3/13/96: 63.42 ug/l, 10/30/96: 114.02 ug/l, 11/21/96 102.97 ug/l, 12/9/96:92.18 ug/l, 11/26/97:2,565.04 ug/l, 1/9/98: 102.97 ug/l, 2/3/98: 92.18 ug/l, 3/25/98: 54.69 ug/l. Zinc: 2/17/94: 109.58 ug/l, 3/19/94: 115.74 ug/l, 11/10/94: 135.87 ug/l, 1/23/95: 92.84 ug/l, 3/10/95: 74.42 ug/l, 12/12/95: 116.76 ug/l, 1/31/96: 109.58 ug/l, 2/19/96: 83.18 ug/l, 3/4/96: 101.27 ug/l, 3/13/96: 101.27 ug/l, 10/30/96: 149.64 ug/l, 11/21/96: 139.83 ug/l, 12/9/96: 129.89 ug/l, 11/26/97: 1,188.55 ug/l, 1/9/98: 139.83 ug/l, 2/3/98: 129.89 ug/l, 3/25/98: 91.77 ug/l. National Toxics Rule Aquatic Life: Selenium 4-day avg. 5 ug/l, and 1-hr avg. 20 ug/l. USEPA National Ambient Water Quality Criteria Toxicity: iron 4-day avg. 1,000 ug/l.
Guideline Reference:	Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency

Spatial Representation:	The 17 samples were collected at one station on City Creek, 2.7 miles north of Highland Avenue (north of mile post 32.35 ug/l) at City Creek, at 1/4 mile directly south of confluence of West and East Forks of City Creek; 435 feet east of Highway 330 ug/l.
Temporal Representation:	The 17 samples were taken on 2/17/94, 3/17/94, 11/10/94, 1/23/95, 3/10/95, 12/12/95, 1/31/96, 2/19/96, 3/4/96, 3/13/96, 10/30/96, 11/21/96, 12/9/96, 11/26/97, 1/9/98, 2/3/98, 3/25/98,
Environmental Conditions:	The samples were collected as grabs during the wet weather.
QAPP Information:	The datas quality is deemed appropriate because it originated from an NPDES discharger in compliance with their monitoring and reporting program requirements.
QAPP Information Reference(s):


DECISION ID	12803

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

Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. One (1) line of evidence is available in the administrative record to assess this pollutant. Of the Twenty-four (24) samples taken, none 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 (0) of twenty-four (24) 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.

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

SWRCB Board Decision / Staff Recommendation:

USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 12803


LOE ID:	5784

Pollutant:	Mercury
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total

Beneficial Use:	Wildlife Habitat

Number of Samples:	24
Number of Exceedances:	0

Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Of the 24 samples collected, none exceeded the standard listed. This data was obtained from the self monitoring reports submitted by San Bernardino County Flood Control District.
Data Reference:	San Bernardino County Flood Control District data from storm water program.

Water Quality Objective/Criterion:	Santa Ana Region's Basin Plan Narrative Objective: The concentrations of toxic pollutants in the water column, sediments, or biota shall not adversely affect beneficial uses.
Objective/Criterion Reference:	Water Quality Control Plan-Santa Ana Region

Evaluation Guideline:	U.S. EPA National Ambient Water Quality Criteria Toxicity: Mercury 1-hr avg. 1.4 ug/l.
Guideline Reference:	Compilation of Water Quality Goals

Spatial Representation:	The 18 samples were collected at one station on City Creek 2.7 miles north of Highland Ave. (north of mile post 32.35) at City Creek Bridge; at 1/4 mile directly south of confluence of West and East Forks of City Creek and 435 feet east of Highway 330.
Temporal Representation:	The 18 samples were taken on 2/17/94, 3/17/94, 11/10/94, 1/23/95, 3/10/95, 12/12/95, 1/31/96, 2/19/86, 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.
Environmental Conditions:	The samples were collected as grab during the wet weather.
QAPP Information:	The datas quality is deemed appropriate because it originated from an NPDES discharger in compliance with their monitoring and reporting program requirements.
QAPP Information Reference(s):


DECISION ID	16571

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

Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Two lines of evidence are available in the administrative record to assess this pollutant. None of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. None of 7 samples exceeded the California Toxics Rule and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.

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

SWRCB Board Decision / Staff Recommendation:

USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 16571


LOE ID:	5787

Pollutant:	Silver
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total

Beneficial Use:	Wildlife Habitat

Number of Samples:	1
Number of Exceedances:	0

Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Of the 17 samples collected, all were reported as non-detect and only one of these had the detection limit below the standard. So only one sample was counted. This data was obtained from the self monitoring reports submitted by San Bernardino County Flood Control District.
Data Reference:	San Bernardino County Flood Control District data from storm water program.

Water Quality Objective/Criterion:	Santa Ana Region's Basin Plan Narrative Objective: The concentrations of toxic pollutants in the water column, sediments, or biota shall not adversely affect beneficial uses.
Objective/Criterion Reference:	Water Quality Control Plan-Santa Ana Region

Evaluation Guideline:	California Toxics Rule Aquatic Life ( the criteria changes from day to day because it is dependent on hardness) silver: 2/17/94: 3.39 ug/l, 3/19/94: 3.78 ug/l, 11/10/94: 5.24 ug/l, 1/23/95: 2.42 ug/l, 3/10/95: 1.54 ug/l, 12/12/95: 3.85 ug/l, 1/31/96: 3.39 ug/l, 2/19/96: 1.93 ug/l, 3/4/96:2.86 ug/l, 3/13/96:2.86 ug/l, 10/30/96: 6.37 ug/l, 11/21/96: 5.55 ug/l, 12/9/96: 4.78 ug/l, 11/26/97: 427.84 ug/l, 1/9/98: 5.55 ug/l, 2/3/98: 4.78 ug/l, 3/25/98: 2.36 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 17 samples were collected at one station on City Creek 2.7 miles north of Highland Ave. (north of mile post 32.35) at City Creek Bridge; at 1/4 mile directly south of confluence of West and East Forks of City Creek and 435 feet east of Highway 330.
Temporal Representation:	The 17 samples were collected on 2/17/94, 3/17/94, 11/10/94, 1/23/95, 3/10/95, 12/12/95, 1/31/96, 2/19/96, 3/4/96, 3/13/96, 10/30/96, 11/21/96, 12/9/96, 11/26/97, 1/9/98, 2/3/98, 3/25/98.
Environmental Conditions:	The samples were collected as wet weather grabs.
QAPP Information:	The datas quality is deemed appropriate because it originated from an NPDES discharger in compliance with their monitoring and reporting program requirements.
QAPP Information Reference(s):


LOE ID:	5780

Pollutant:	Silver
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total

Beneficial Use:	Wildlife Habitat

Number of Samples:	6
Number of Exceedances:	0

Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Of the 6 samples collected all were reported as non detect and the detection limit was below the standard and therefore all the samples were counted as none exceeding the standards.
Data Reference:	San Bernardino County Flood Control District data from storm water program.

Water Quality Objective/Criterion:	Santa Ana Region's Basin Plan Narrative Objective: The concentrations of toxic pollutants in the water column, sediments, or biota shall not adversely affect beneficial uses.
Objective/Criterion Reference:	Water Quality Control Plan-Santa Ana Region

Evaluation Guideline:	CTR Aquatic Life: Silver 11/1/94: 4.56 ug/l, 6/6/95: 2.65 ug/l, 8/14/95: 3.39 ug/l, 7/30/96: 6.37 ug/l, 8/20/97: 8.15 ug/l, 7/29/98: 2.82 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 6 samples were collected at one station on City Creek, 2.7 miles north of Highland Ave. (north of mile post 32.35) at City Creek Bridge; at 1/4 mile directly south of confluence of West and East Forks of City Creek and 435 feet east of Highway 330.
Temporal Representation:	The 6 samples were collected on 11/1/94, 6/6/95, 8/14/95, 7/30/96, 8/20/97, 7/29/98.
Environmental Conditions:	The samples were taken as grabs during the dry weather.
QAPP Information:	The datas quality is deemed appropriate because it originated from an NPDES discharger in compliance with their monitoring and reporting program requirements.
QAPP Information Reference(s):


DECISION ID	12779

Pollutant:	Cadmium
Final Listing Decision:	List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Sources:	Source Unknown
Expected TMDL Completion Date:	2022
Impairment from Pollutant or Pollution:	Pollutant

Weight of Evidence:	This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. One line of evidence is available in the administrative record to assess this pollutant. Seventeen (17) of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification in favor of placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Seventeen (17) of eighteen (18) samples exceed the California Toxics Rule 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.

RWQCB Board Decision / Staff Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should be placed on the section 303(d) list because applicable water quality standards are exceeded and a pollutant contributes to or causes the problem.

SWRCB Board Decision / Staff Recommendation:

USEPA Decision:

Lines of Evidence (LOEs) for Decision ID 12779


LOE ID:	5782

Pollutant:	Cadmium
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	Total

Beneficial Use:	Wildlife Habitat

Number of Samples:	18
Number of Exceedances:	17

Data and Information Type:	PHYSICAL/CHEMICAL MONITORING
Data Used to Assess Water Quality:	Of the 18 samples collected, 17 exceeded the standards/guidelines. This data was obtained from the self monitoring reports submitted by San Bernardino County Flood Control District.
Data Reference:	San Bernardino County Flood Control District data from storm water program.

Water Quality Objective/Criterion:	Santa Ana Region's Basin Plan Narrative Objective: The concentrations of toxic pollutants in the water column, sediments, or biota shall not adversely affect beneficial uses.
Objective/Criterion Reference:	Water Quality Control Plan-Santa Ana Region

Evaluation Guideline:	California Toxics Rule Aquatic Life (this criteria changes day to day because it is hardness dependent): 2/17/94: 4.01 ug/l, 3/19/94: 4.31 ug/l, 11/10/94: 5.34 ug/l, 1/23/95: 3.22 ug/l, 3/10/95: 2.40 ug/l, 12/12/95: 4.36 ug/l, 1/31/96: 4.01 ug/l, 2/19/96: 2.78 ug/l, 3/4/96: 3.61 ug/l, 3/13/96: 3.61 ug/l, 10/30/96: 6.07 ug/l, 11/21/96: 5.55 ug/l, 12/9/96: 5.03 ug/l, 11/26/97: 95.83 ug/l, 1/9/98: 5.55 ug/l, 2/3/98: 5.03 ug/l, 3/25/98: 3.17 ug/l, 1/25/00: 4.26 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 18 samples were collected at one station (station 9) on City Creek, 2.7 miles north of Highland Avenue (north of mile post 32.35) at City Creek Bridge and at 1/4 mile due south of confluence of West and East Forks of City Creek and at 435 feet east of Highway 330.
Temporal Representation:	The 18 samples were taken on 2/17/94, 3/17/94, 11/10/94, 1/23/95, 3/10/95, 12/12/95, 1/31/96, 2/19/86, 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, 1/25/200.
Environmental Conditions:	The samples were collected as grab samples during the wet weather.
QAPP Information:	The datas quality is deemed appropriate because it originated from an NPDES discharger in compliance with their monitoring and reporting program requirements.
QAPP Information Reference(s):