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

Supporting Information

Regional Board 5 - Central Valley Region

Water Body Name:	Bull Meadow Creek (Tuolumne County)
Water Body ID:	CAR5364003220101020160009
Water Body Type:	River & Stream


DECISION ID	100125	Region 5
Bull Meadow Creek (Tuolumne 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. Four lines of evidence are available in the administrative record to assess this pollutant. Five of five samples exceed the evaluation guideline for Escherichia coli (E. coli). One of one calculated geomeans exceed the evaluation guideline for Escherichia coli (E. coli). Five of five samples exceed the water quality objective for fecal coliform. One of one calculated geomeans exceed the water quality objective for fecal coliform. 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. Five of five samples exceed the evaluation guidelines for Escherichia coli (E. coli). Five of Five samples exceed the water quality objective for fecal coliform. 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 100125, Indicator Bacteria	Region 5
Bull Meadow Creek (Tuolumne County)

LOE ID:

96072

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:

Five of the 5 samples exceeded the E. coli SSM guideline. Split samples were not used.

Data Reference:

Data for Fecal Col, E.coli, and Observations in Region 5 for Various Water Bodies, 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:

Single sample maxima (SSM) of allowable density for E. coli in freshwater is 235 MPN/100mL.

Guideline Reference:

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

Spatial Representation:

The 5 samples were collected from Bull Meadow Creek. CAR5364003220101020160009

Temporal Representation:

Samples were collected from June to July of 2010.

Environmental Conditions:

The samples collected after cows were present in the area.

QAPP Information:

Samples were collected under the Surface Water Ambient Monitoring Project in the Stanislaus National Forest Quality Assurance Project Plan.

QAPP Information Reference(s):

Quality Assurance Project Plan for Stanislaus National Forest.

Line of Evidence (LOE) for Decision ID 100125, Indicator Bacteria	Region 5
Bull Meadow Creek (Tuolumne County)

LOE ID:

60957

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:

One of One geometric mean samples exceeded the E. coli guideline.

Data Reference:

Data for Fecal Col, E.coli, and Observations in Region 5 for Various Water Bodies, 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:

Geometric mean for E. coli in freshwater is 100 cfu/100mL.

Guideline Reference:

2012 USEPA Recreational Water Quality Criteria - Bacteria

Spatial Representation:

The samples were collected from Bull Meadow Creek. CAR5364003220101020160009

Temporal Representation:

Samples were collected from June to July of 2010.

Environmental Conditions:

The samples collected after cows were present in the area.

QAPP Information:

Samples were collected under the Surface Water Ambient Monitoring Project in the Stanislaus National Forest Quality Assurance Project Plan.

QAPP Information Reference(s):

Quality Assurance Project Plan for Stanislaus National Forest.

Line of Evidence (LOE) for Decision ID 100125, Indicator Bacteria	Region 5
Bull Meadow Creek (Tuolumne County)

LOE ID:

60972

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:

One of one sample exceeded the fecal coliform geometric mean objective.

Data Reference:

Data for Fecal Col, E.coli, and Observations in Region 5 for Various Water Bodies, 2010.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Geometric mean: In waters designated for contact recreation (REC-1), the fecal coliform concentration 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:

The samples were collected from Bull Meadow Creek. CAR5364003220101020160009

Temporal Representation:

Samples were collected from June to July of 2010.

Environmental Conditions:

The samples were collected after the cows were present in the area.

QAPP Information:

Samples were collected under the Surface Water Ambient Monitoring Project in the Stanislaus National Forest Quality Assurance Project Plan.

QAPP Information Reference(s):

Quality Assurance Project Plan for Stanislaus National Forest.

Line of Evidence (LOE) for Decision ID 100125, Indicator Bacteria	Region 5
Bull Meadow Creek (Tuolumne County)

LOE ID:

60958

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:

Five of the 5 samples exceeded the fecal coliform objective. Split samples were deemed inappropriate for use in assessment based on feedback from the State Board QA team.

Data Reference:

Data for Fecal Col, E.coli, and Observations in Region 5 for Various Water Bodies, 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 10 percent of the time during any 30 day period.

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:

The 5 samples were collected from Bull Meadow Creek.

Temporal Representation:

Samples were collected from June to July of 2010.

Environmental Conditions:

The samples were collected after the cows were present in the area.

QAPP Information:

Samples were collected under the Surface Water Ambient Monitoring Project in the Stanislaus National Forest Quality Assurance Project Plan.

QAPP Information Reference(s):

Quality Assurance Project Plan for Stanislaus National Forest.

Line of Evidence (LOE) for Decision ID 100125, Indicator Bacteria	Region 5
Bull Meadow Creek (Tuolumne County)

LOE ID:

60956

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:

Five of the 5 samples exceeded the E. coli STV guideline. Split samples were not used.

Data Reference:

Data for Fecal Col, E.coli, and Observations in Region 5 for Various Water Bodies, 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:

Statistical Threshold Value (STV) of allowable density for E. coli in freshwater is 320 cfu/100mL.

Guideline Reference:

2012 USEPA Recreational Water Quality Criteria - Bacteria

Spatial Representation:

The 5 samples were collected from Bull Meadow Creek. CAR5364003220101020160009

Temporal Representation:

Samples were collected from June to July of 2010.

Environmental Conditions:

The samples collected after cows were present in the area.

QAPP Information:

Samples were collected under the Surface Water Ambient Monitoring Project in the Stanislaus National Forest Quality Assurance Project Plan.

QAPP Information Reference(s):

Quality Assurance Project Plan for Stanislaus National Forest.

Line of Evidence (LOE) for Decision ID 100125, Indicator Bacteria	Region 5
Bull Meadow Creek (Tuolumne County)

LOE ID:

96073

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:

One of One geometric mean samples exceeded the E. coli guideline.

Data Reference:

Data for Fecal Col, E.coli, and Observations in Region 5 for Various Water Bodies, 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:

Geometric mean for E. coli in freshwater is 126 cfu/100mL.

Guideline Reference:

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

Spatial Representation:

The samples were collected from Bull Meadow Creek. CAR5364003220101020160009

Temporal Representation:

Samples were collected from June to July of 2010.

Environmental Conditions:

The samples collected after cows were present in the area.

QAPP Information:

Samples were collected under the Surface Water Ambient Monitoring Project in the Stanislaus National Forest Quality Assurance Project Plan.

QAPP Information Reference(s):

Quality Assurance Project Plan for Stanislaus National Forest.