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

Supporting Information

Regional Board 5 - Central Valley Region

Water Body Name:	Jawbone Creek, unnamed tributary (Tuolumne County)
Water Body ID:	CAR5364004020101020133452
Water Body Type:	River & Stream


DECISION ID	99995	Region 5
Jawbone Creek, unnamed tributary (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 of 9 individual sample results exceed the acute evaluation guideline for Escherichia coli (E. coli). Three of 6 calculated geomean results exceed the chronic evaluation guideline for Escherichia coli (E. coli). Three of 9 individual sample results exceed the acute water quality objective for fecal coliform. Four of 6 calculated geomean results exceed the chronic water quality objective for fecal coliform. Based on the readily available data and information, the weight of evidence indicates that there is insufficient 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. Four of 9 individual sample results exceed the acute evaluation guideline for Escherichia coli (E. coli). Three of 6 calculated geomean results exceed the chronic evaluation guideline for Escherichia coli (E. coli). Three of 9 individual sample results exceed the acute water quality objective for fecal coliform. Four of 6 calculated geomean results exceed the chronic water quality objective for fecal coliform. These sample and exceedance counts do 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 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 99995, Indicator Bacteria	Region 5
Jawbone Creek, unnamed tributary (Tuolumne County)

LOE ID:

96078

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 samples exceeded the SSM for the E. coli evaluated.

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 single sample maxima (SSM) 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 samples were collected from a tributary to Jawbone Creek where it flows out of Boggy Meadow. Sample site Bog 1 is outside a fenced area where livestock are present and Bog 2 is inside the fenced area where there are no livestock. These sites were reported as 100 ft apart and therefore were averaged for temporal independence.

Temporal Representation:

Samples were collected between July and August of 2010.

Environmental Conditions:

All of the exceedances were from the site Bog 1 where livestock were present.

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 99995, Indicator Bacteria	Region 5
Jawbone Creek, unnamed tributary (Tuolumne County)

LOE ID:

65171

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 six calculated geomeans exceeded the fecal coliform geomean 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 geometric mean 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:

Temporal Representation:

Samples were collected from July to August of 2010. Samples were collected from the two sites on the same day.

Environmental Conditions:

All of the exceedances were from the site Bog 1 where livestock were present. If the sites were not averaged, Bog 1 would have 6 out of 6 exceedances and Bog 2 would have zero of 6 exceedances.

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 99995, Indicator Bacteria	Region 5
Jawbone Creek, unnamed tributary (Tuolumne County)

LOE ID:

96079

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 six samples exceeded the calculated E. coli geometric mean 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 geometric mean objective for E. coli in freshwater is 126cfu/100mL.

Guideline Reference:

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

Spatial Representation:

Temporal Representation:

Samples were collected from July to August of 2010.

Environmental Conditions:

All of the exceedances were from the site Bog 1 where livestock were present.

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 99995, Indicator Bacteria	Region 5
Jawbone Creek, unnamed tributary (Tuolumne County)

LOE ID:

65172

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:

Three of the nine 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:

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

Temporal Representation:

Samples were collected from July to August of 2010. Samples were collected from the two sites on the same day.

Environmental Conditions:

All of the exceedances were from the site Bog 1, where livestock were present. If the data for the two sites were not averaged, Bog 1 would have 5 out of 9 exceedances and Bog 2 would have zero of 9 exceedances.

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 99995, Indicator Bacteria	Region 5
Jawbone Creek, unnamed tributary (Tuolumne County)

LOE ID:

65170

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 nine samples exceeded the STV for the E. coli evaluated.

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 statistical threshold value (STV) allowable density for E. coli in freshwater is 320 cfu/100mL. (USEPA. 2012 Recreational Water Quality Criteria for Bacteria)

Guideline Reference:

2012 USEPA Recreational Water Quality Criteria - Bacteria

Spatial Representation:

Temporal Representation:

Samples were collected between July and August of 2010.

Environmental Conditions:

All of the exceedances were from the site Bog 1 where livestock were present.

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 99995, Indicator Bacteria	Region 5
Jawbone Creek, unnamed tributary (Tuolumne County)

LOE ID:

65169

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 six samples exceeded the calculated E. coli geometric mean 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 geometric mean objective for E. coli in freshwater is 100 cfu/100mL. (USEPA. 2012. Recreational Water Quality Criteria for Bacteria)

Guideline Reference:

2012 USEPA Recreational Water Quality Criteria - Bacteria

Spatial Representation:

Temporal Representation:

Samples were collected from July to August of 2010.

Environmental Conditions:

All of the exceedances were from the site Bog 1 where livestock were present.

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.