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

Supporting Information

Regional Board 5 - Central Valley Region

Water Body Name:	Jawbone Creek (Tuolumne County)
Water Body ID:	CAR5364004020110207143809
Water Body Type:	River & Stream


DECISION ID	85315	Region 5
Jawbone Creek (Tuolumne County)

Pollutant:	Indicator Bacteria
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. Four lines of evidence are available in the administrative record to assess this pollutant. Three of 13 samples exceed the single sample maximum evaluation guideline for Escherichia coli (E. coli). Four of nine calculated geomeans exceed the evaluation guideline for Escherichia coli (E. coli). One of 13 samples exceed the single sample maximum water quality objective for fecal coliform. Four of 13 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 against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Three of 13 samples exceed the evaluation guideline for Escherichia coli (E. coli). Four of nine calculated geomeans exceed the evaluation guideline for Escherichia coli (E. coli). One of 13 samples exceed the water quality objective for fecal coliform. Four of 13 calculated geomeans exceed the water quality objective for fecal coliform. 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. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.

State Board Review of Regional Board Conclusion and Recommendation:

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

Line of Evidence (LOE) for Decision ID 85315, Indicator Bacteria	Region 5
Jawbone Creek (Tuolumne County)

LOE ID:

65127

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:

Four of the nine geomeans exceeded the E. coli evaluation 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:

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 geometric mean for E. coli in freshwater is 126 MPN/100mL. (USEPA. 1986. Ambient Water Quality Criteria for Bacteria)

Guideline Reference:

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

Spatial Representation:

The samples were collected at Jawbone Creek. WBID: CAR5364004020101020133452

Temporal Representation:

Samples were collected between June 2010 and August 2010.

Environmental Conditions:

QAPP Information:

Samples were collected under the Bacteria Contamination of Surface Waters Due to Livestock Grazing in the Stanislaus National Forest, California (Second Year of Study).

QAPP Information Reference(s):

Quality Assurance Project Plan for Stanislaus National Forest.

Line of Evidence (LOE) for Decision ID 85315, Indicator Bacteria	Region 5
Jawbone Creek (Tuolumne County)

LOE ID:

65128

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 the thirteen samples exceeded the fecal coliform 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:

The fecal coliform concentration shall not exceed more than 10 percent of total samples during any 30-day period exceed 400/100 ml. (Water Quality Control Plan for Central Valley Water Quality Control Board, 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:

Guideline Reference:

Spatial Representation:

The samples were collected at Jawbone Creek. WBID: CAR5364004020101020133452

Temporal Representation:

Samples were collected between June 2010 and August 2010.

Environmental Conditions:

QAPP Information:

Samples were collected under the Bacteria Contamination of Surface Waters Due to Livestock Grazing in the Stanislaus National Forest, California (Second Year of Study).

QAPP Information Reference(s):

Quality Assurance Project Plan for Stanislaus National Forest.

Line of Evidence (LOE) for Decision ID 85315, Indicator Bacteria	Region 5
Jawbone Creek (Tuolumne County)

LOE ID:

65129

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 nine calculated geomeans exceeded the fecal coliform 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: The fecal coliform concentration shall not exceed 200/100 ml. (Water Quality Control Plan for Central Valley Water Quality Control Board, 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:

Guideline Reference:

Spatial Representation:

The samples were collected at Jawbone Creek. WBID: CAR5364004020101020133452

Temporal Representation:

Samples were collected between June 2010 and August 2010.

Environmental Conditions:

QAPP Information:

Samples were collected under the Bacteria Contamination of Surface Waters Due to Livestock Grazing in the Stanislaus National Forest, California (Second Year of Study).

QAPP Information Reference(s):

Quality Assurance Project Plan for Stanislaus National Forest.

Line of Evidence (LOE) for Decision ID 85315, Indicator Bacteria	Region 5
Jawbone Creek (Tuolumne County)

LOE ID:

65126

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:

Three of the thirteen samples exceeded the E. coli evaluation 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:

The single-sample, maximum allowable density for E. coli in freshwater is 235 MPN/100mL. (USEPA. 1986. Ambient Water Quality Criteria for Bacteria)

Guideline Reference:

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

Spatial Representation:

The samples were collected at Jawbone Creek.

Temporal Representation:

Samples were collected between June 2010 and August 2010.

Environmental Conditions:

QAPP Information:

Samples were collected under the Bacteria Contamination of Surface Waters Due to Livestock Grazing in the Stanislaus National Forest, California (Second Year of Study).

QAPP Information Reference(s):

Quality Assurance Project Plan for Stanislaus National Forest.