Final California 2020 Integrated Report (303(d) List/305(b) Report)

Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

California Ocean Plan (SWRCB 2005) states that the single sample maximum for fecal coliform shall not exceed 400 MPN/100 mL.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Data for this line of evidence for Pacific Ocean at Cayucos was collected at one AB411 monitoring site (CAY15)

Temporal Representation:

Data was collected over the time period 1/4/2005 - 12/28/2006. This includes weekly AB411 monitoring between April 1 and October 31 of each year.

Environmental Conditions:

QAPP Information:

QA information not available

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 71723, Fecal Coliform	Region 3
Pacific Ocean at Cayucos (Cayucos Creek Mouth)

LOE ID:

19421

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:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Central Coast Regional Board Staff assessed data for Pacific Ocean at Cayucos (Cayucos Creek Mouth) to determine beneficial use support and results are as follows: 2 of 24 samples exceed the criterion for Coliform, Fecal.

Data Reference:

Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

California Ocean Plan (SWRCB 2005) states that the 30-day geometric mean for fecal coliform shall not exceed 200 MPN/100 mL.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Data for this line of evidence for Pacific Ocean at Cayucos was collected at one AB411 monitoring site (CAY15)

Temporal Representation:

Data was collected over the time period 1/4/2005 - 12/28/2006. This includes weekly AB411 monitoring between April 1 and October 31 of each year.

Environmental Conditions:

QAPP Information:

QA information not available

QAPP Information Reference(s):


DECISION ID	79825	Region 3
Pacific Ocean at Cayucos (Cayucos Creek Mouth)

Pollutant:	Enterococcus
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:	No new data were assessed. This pollutant is being considered for removal from the section 303(d) list under sections 4.2 and 4.3 of the Listing Policy. Under these sections, 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. Six of 24 samples exceeded the geometric mean standard for enterococcus (LOE 19423) and 19 of 118 samples exceeded the single sample maximum for enterococcus (LOE 19424) for the water contact recreation water quality standard (Water Quality Control Plan: Ocean Waters of California, SWRCB, 2005). Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against removing this water segment-pollutant combination from the 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. Six of 24 samples exceeded the geometric mean standard for fecal coliform (LOE 19423) and this exceeds the allowable frequency listed in Table 4.2 of the Listing Policy. 4. Pursuant to section 4.11 of the Listing Policy, no additional data and information are available indicating that standards are met.

Regional Board Decision Recommendation:	This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current cycle. The decision has not changed.

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 79825, Enterococcus	Region 3
Pacific Ocean at Cayucos (Cayucos Creek Mouth)

LOE ID:

19424

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

118

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Central Coast Regional Board Staff assessed data for Pacific Ocean at Cayucos (Cayucos Creek Mouth) to determine beneficial use support and results are as follows: 19 of 118 samples exceed the criterion for Enterococci.

Data Reference:

Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

California Ocean Plan (SWRCB 2005) states that the single sample maximum for Enterococcus shall not exceed 104 MPN/100 mL.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Data for this line of evidence for Pacific Ocean at Cayucos was collected at one AB411 monitoring site (CAY15)

Temporal Representation:

Data was collected over the time period 1/4/2005 - 12/28/2006. This includes weekly AB411 monitoring between April 1 and October 31 of each year.

Environmental Conditions:

QAPP Information:

QA information not available

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 79825, Enterococcus	Region 3
Pacific Ocean at Cayucos (Cayucos Creek Mouth)

LOE ID:

19423

Pollutant:

Enterococcus

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Central Coast Regional Board Staff assessed data for Pacific Ocean at Cayucos (Cayucos Creek Mouth) to determine beneficial use support and results are as follows: 6 of 24 samples exceed the criterion for Enterococci.

Data Reference: