Final California 2018 Integrated Report (303(d) List/305(b) Report)

Supporting Information

Regional Board 5 - Central Valley Region

Water Body Name:	Rock Creek (Placer County)
Water Body ID:	CAR5142201120090105143038
Water Body Type:	River & Stream


DECISION ID	94950	Region 5
Rock Creek (Placer County)

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

Regional Board Conclusion:	This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1, a single line of evidence is necessary to assess listing status. Two lines of evidence are available in the administrative record to assess this pollutant. Zero of the 169 samples exceed the calculated CCC applicable to the Fish Spawning beneficial use. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List 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. Zero of the 169 samples exceed the calculated CCC applicable to the Fish Spawning beneficial use, and this does not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.

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

State Board Review of Regional Board Conclusion and Recommendation:

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

Line of Evidence (LOE) for Decision ID 94950, Nitrogen, ammonia (Total Ammonia)	Region 5
Rock Creek (Placer County)

LOE ID:

69461

Pollutant:

Nitrogen, ammonia (Total Ammonia)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Fish Spawning

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

None of the samples exceed the water USEPA Temperature and pH-Dependent values of the CCC (Chronic Criterion) for Fish Early Life Stages Present for ammonia. 62 of the 78 data are reported as non-detects. These non-detects are less than or equal to the water quality standard, the value will be considered as meeting the water quality standard, objective, criterion, or evaluation guideline.

Data Reference:

Data for Various Pollutants at Placer County Utilities, 2005-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Sacramento and San Joaquin Region (CVRWQCB 2007): All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. There is no water quality objective for ammonia in the Water Quality Control Plan, Central Valley Basin. Instead, the USEPA criteria for ammonia was used as Temperature and pH-Dependent Values of the CCC (Chronic Criterion) for Fish Early Life Stages Present.

Objective/Criterion Reference:

1999 Update of Ambient Water Quality Criteria for Ammonia

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Samples were collected at R3.

Temporal Representation:

Samples were collected from Jan to July 2005, Nov to Dec 2007, Jan 2008, Jan to Nov 2009, and the month of March 2010.

Environmental Conditions:

QAPP Information:

A signed QAPP was not submitted.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 94950, Nitrogen, ammonia (Total Ammonia)	Region 5
Rock Creek (Placer County)

LOE ID:

69455

Pollutant:

Nitrogen, ammonia (Total Ammonia)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Fish Spawning

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

None of the samples exceed the water USEPA Temperature and pH-Dependent values of the CCC (Chronic Criterion) for Fish Early Life Stages Present for ammonia. 71 of the 91 data are reported as non-detects. These non-detects are less than or equal to the water quality standard, the value will be considered as meeting the water quality standard, objective, criterion, or evaluation guideline.

Data Reference:

Data for Various Pollutants at Placer County Utilities, 2005-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

1999 Update of Ambient Water Quality Criteria for Ammonia

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Samples were collected at R1.

Temporal Representation:

Samples were collected from Jan to Sept 2005, April to Oct 2006, June to Dec 2007, Jan to Aug 2008, Jan to Nov 2009, and the month of March 2010.

Environmental Conditions:

QAPP Information:

A signed QAPP was not submitted.

QAPP Information Reference(s):


DECISION ID	93205	Region 5
Rock Creek (Placer County)

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

Regional Board Conclusion:	This pollutant is being considered for placement on the CWA section 303(d) List under section 3.2 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. 72 of the 1799 samples exceed the Criteria/Objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List 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. 72 of 1799 samples exceeded the Criteria/Objective and this does not exceed the allowable frequency listed in Table 3.2 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.

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

State Board Review of Regional Board Conclusion and Recommendation:

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

Line of Evidence (LOE) for Decision ID 93205, Oxygen, Dissolved	Region 5
Rock Creek (Placer County)

LOE ID:

59329

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

1799

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

There were 72 out of 1799 daily averaged samples collected between January 2005 and April 2010 that exceeded the water quality objective for dissolved oxygen in this water body.

Data Reference:

Data for Various Pollutants at Placer County Utilities, 2005-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

From the Basin Plan, the minimum level for dissolved oxygen is 7 mg/L for waters designated as COLD.

Objective/Criterion Reference:

Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Samples collected at station SDM-1 (Lat. 38º 57 56 N Lon. 121º 06 36 W)

Temporal Representation:

Daily samples collected between January, 2005 and April, 2010. It should be noted that samples were not collected on every single day during this time period.

Environmental Conditions:

QAPP Information:

Data were collected in order to comply with NPDES permit CA0079316.

QAPP Information Reference(s):


DECISION ID	93206	Region 5
Rock Creek (Placer County)

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

Regional Board Conclusion:	This pollutant is being considered for placement on the CWA section 303(d) List under section 3.2 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. One of the 1800 samples exceed the Criteria/Objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. One of 1800 samples exceeded the Criteria/Objective and this does not exceed the allowable frequency listed in Table 3.2 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.

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

State Board Review of Regional Board Conclusion and Recommendation:

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

Line of Evidence (LOE) for Decision ID 93206, Specific Conductivity	Region 5
Rock Creek (Placer County)

LOE ID:

59331

Pollutant:

Specific Conductivity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

1800

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

There was 1 out of 1800 daily averaged samples collected between January 2005 and April 2010 that exceeded the water quality objective for electrical conductivity.

Data Reference:

Data for Various Pollutants at Placer County Utilities, 2005-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The secondary MCLs for electrical conductivity provide a range of values including a recommended level (900 uS/cm), upper level (1600 uS/cm) and a short-term level (2200 uS/cm). The 'recommended' level of 900 uS/cm was used as it is intended to be protective of all drinking water uses.

Objective/Criterion Reference:

Secondary Maximum Contaminant Levels and Compliance. CCR Title 22 section 64449.

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Samples collected at station SDM-1 (Lat. 38º 57 56 N Lon. 121º 06 36 W)

Temporal Representation:

Daily samples collected between January, 2005 and April, 2010. It should be noted that samples were not collected on every single day during this time period.

Environmental Conditions:

QAPP Information:

Data were collected in order to comply with NPDES permit CA0079316.

QAPP Information Reference(s):


DECISION ID	92348	Region 5
Rock Creek (Placer County)

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

Regional Board Conclusion:	This pollutant is being considered for placement on the CWA section 303(d) List under section 3.2 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. 177 of the 1802 samples exceed the Evaluation Guideline. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List 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. 177 of 1802 samples exceeded the Evaluation Guideline and this does not exceed the allowable frequency listed in Table 3.2 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.

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

State Board Review of Regional Board Conclusion and Recommendation:

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

Line of Evidence (LOE) for Decision ID 92348, Temperature, water	Region 5
Rock Creek (Placer County)

LOE ID:

69462

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

1802

Number of Exceedances:

177

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

There were 177 out of 1802 daily samples collected between January 2005 and April 2010 that exceeded the water quality objective for temperature in this water body.

Data Reference:

Data for Various Pollutants at Placer County Utilities, 2005-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The natural receiving water temperature of intrastate waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Water Board that such alteration in temperature does not adversely affect beneficial uses. In determining compliance with the water quality objectives for temperature, appropriate averaging periods may be applied provided that beneficial uses will be fully protected. (Central Valley Regional Board Basin Plan, Pg. III-8.00, Water Quality Objectives)

Objective/Criterion Reference:

Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

Inland Fishes of California (1976)

Spatial Representation:

Samples collected at station SDM-1 (Lat. 38º 57 56 N Lon. 121º 06 36 W)

Temporal Representation:

Daily samples collected between January, 2005 and April, 2010. It should be noted that samples were not collected on every single day during this time period.

Environmental Conditions:

QAPP Information:

Data were collected in order to comply with NPDES permit CA0079316.

QAPP Information Reference(s):


DECISION ID	99035	Region 5
Rock Creek (Placer County)

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

Regional Board Conclusion:	This pollutant is being considered for placement on the CWA 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. One of the 1799 samples exceed the Criteria/Objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. One of 1799 samples exceeded the Criteria/Objective and this does not exceed the allowable frequency listed in Table 3.2 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.

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

State Board Review of Regional Board Conclusion and Recommendation:

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

Line of Evidence (LOE) for Decision ID 99035, pH	Region 5
Rock Creek (Placer County)

LOE ID:

59330

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

1799

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

There were 2 out of 1799 daily averaged samples collected between January 2005 and April 2010 that exceeded the water quality objective for pH in this water body (they measured above 8.5).

Data Reference:

Data for Various Pollutants at Placer County Utilities, 2005-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

From the Basin Plan, pH levels should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Samples collected at station SDM-1 (Lat. 38º 57 56 N Lon. 121º 06 36 W)

Temporal Representation:

Daily samples collected between January, 2005 and April, 2010. It should be noted that samples were not collected on every single day during this time period.

Environmental Conditions:

QAPP Information:

Data were collected in order to comply with NPDES permit CA0079316.

QAPP Information Reference(s):


DECISION ID	95228	Region 5
Rock Creek (Placer County)

Pollutant:	Indicator Bacteria
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:	2027
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	This pollutant is being considered for placement on the CWA section 303(d) List under section 3.2 of the Listing Policy. Under section 3.2 a single line of evidence is necessary to assess listing status. Six lines of evidence are available in the administrative record to assess this pollutant. 65 of 254 water samples exceed the fecal coliform water quality objective for REC-1. 153 of 179 water samples exceed the E. coli evaluation guideline for REC-1. 85 of 442 water samples exceed the total coliform evaluation guideline for REC-1. 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 CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. 65 of 254 water samples exceed the fecal coliform water quality objective for REC-1, and this exceeds the allowable frequency listed in Table 3.2 of the Listing Policy. 153 of 179 water samples exceed the E. coli evaluation guideline for REC-1, and this exceeds the allowable frequency listed in Table 3.2 of the Listing Policy. 85 of 442 water samples exceed the total coliform evaluation guideline for REC-1, and this exceeds the allowable frequency listed in Table 3.2 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.

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

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	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 95228, Indicator Bacteria	Region 5
Rock Creek (Placer County)

LOE ID:

59242

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

120

Number of Exceedances:

Data and Information Type:

Not Specified

Data Used to Assess Water Quality:

Ninety-four of the 120 samples exceeded the E. coli objective.

Data Reference:

Data for Various Pollutants at Placer County Utilities, 2005-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Waters shall not contain chemical constituents in concentrations that adversely affect beneficial uses. (Water Quality Control Plan, Central Valley Region, Sacramento River and San Joaquin River Basins)

Objective/Criterion Reference:

Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed

Evaluation Guideline:

The E. coli concentration shall not exceed more than 235/100 ml. USEPA Ambient Water Quality Criteria for Bacteria - 1986.

Guideline Reference:

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

Spatial Representation:

The samples were collected at RSW001 in Rock Creek upstream of the discharge location, RSW002 in Rock Creek downstream of the discharge location, RSW003 in Dry Creek and RSW004 in Dry Creek downstream of the confluence of Rock Creek and Dry Creek.

Temporal Representation:

The samples were collected from July 2005 to April 2010.

Environmental Conditions:

QAPP Information:

The data was collected for the NPDES permit CA0079316, Waste Discharge Requirments for the Placer County Department of Facility Services. No QAPP was provided.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 95228, Indicator Bacteria	Region 5
Rock Creek (Placer County)

LOE ID:

59244

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:

Nine of the fourteen samples exceeded the fecal coliform objective.

Data Reference:

Data for Various Pollutants at Placer County Utilities, 2005-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

In waters designated for contact recreation (REC-1), the geometric mean for fecal coliform shall not exceed 200/100ml.

Objective/Criterion Reference:

Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Temporal Representation:

The samples were collected from July 2005 to April 2010.

Environmental Conditions:

QAPP Information:

The data was collected for the NPDES permit CA0079316, Waste Discharge Requirments for the Placer County Department of Facility Services. No QAPP was provided.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 95228, Indicator Bacteria	Region 5
Rock Creek (Placer County)

LOE ID:

59243

Pollutant:

Escherichia coli (E. coli)

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:

Fifty-nine of the 59 samples exceeded the E. coli objective.

Data Reference:

Data for Various Pollutants at Placer County Utilities, 2005-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed

Evaluation Guideline:

The geometric mean for E. coli shall not exceed more than 126/100 ml. USEPA Ambient Water Quality Criteria for Bacteria - 1986.

Guideline Reference:

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

Spatial Representation:

Temporal Representation:

The samples were collected from July 2005 to April 2010.

Environmental Conditions:

QAPP Information:

The data was collected for the NPDES permit CA0079316, Waste Discharge Requirments for the Placer County Department of Facility Services. No QAPP was provided.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 95228, Indicator Bacteria	Region 5
Rock Creek (Placer County)

LOE ID:

59241

Pollutant:

Fecal Coliform

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

240

Number of Exceedances:

Data and Information Type:

Not Specified

Data Used to Assess Water Quality:

Fifty-six of the 240 samples exceeded the fecal coliform objective.

Data Reference:

Data for Various Pollutants at Placer County Utilities, 2005-2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

In waters designated for contact recreation (REC-1), the fecal coliform concentration shall not exceed 400/100ml.

Objective/Criterion Reference:

Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Temporal Representation:

The samples were collected from July 2005 to April 2010.

Environmental Conditions:

QAPP Information:

The data was collected for the NPDES permit CA0079316, Waste Discharge Requirments for the Placer County Department of Facility Services. No QAPP was provided.

QAPP Information Reference(s):