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

Supporting Information

Regional Board 3 - Central Coast Region

Water Body Name: Pacific Ocean at Pismo State Beach (San Luis Obispo County), south of Pismo Pier
Water Body ID: CAC3102601420100622164704
Water Body Type: Coastal & Bay Shoreline
 
DECISION ID
77673
Region 3     
Pacific Ocean at Pismo State Beach (San Luis Obispo County), south of Pismo Pier
 
Pollutant: Enterococcus
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: No new data were assessed.

This pollutant is being considered for placement on the CWA section 303(d) List under sections 3.2 and 3.3 of the Listing Policy. Under these sections, 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 38 samples exceeded the geometric mean standard for enterococcus (LOEs 20082 and 32438) and 12 of 174 samples exceeded the single sample maximum for enterococcus (LOEs 20099 and 31439) 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 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 38 samples exceeded the geometric mean standard for enterococcus (LOEs 20082 and 32438) and 12 of 174 samples exceeded the single sample maximum for enterococcus (LOEs 20099 and 31439) for the water contact recreation water quality standard 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: 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 77673, Enterococcus
Region 3     
Pacific Ocean at Pismo State Beach (San Luis Obispo County), south of Pismo Pier
 
LOE ID: 20099
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 111
Number of Exceedances: 10
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Central Coast Regional Board Staff assessed data for Pacific Ocean at Pismo State Beach (San Luis Obispo County), south of Pismo Pier to determine beneficial use support and results are as follows: 10 of 111 samples exceed the criterion for Enterococci.
Data Reference: AB 411 Data for 2004
  AB 411 Data for 2005
  AB 411 Data for 2006
 
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: Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Pacific Ocean at Pismo Beach (San Luis Obispo County) was collected at one AB411 monitoring site (PB4)
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 77673, Enterococcus
Region 3     
Pacific Ocean at Pismo State Beach (San Luis Obispo County), south of Pismo Pier
 
LOE ID: 31439
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 63
Number of Exceedances: 2
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Data was collected from April 2005 through October 2006. A total of 63 dry month (April through October) single samples were collected. Two of the 63 samples exceeded the water quality objective.
Data Reference: AB 411 Data for 2004
  AB 411 Data for 2005
  AB 411 Data for 2006
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: AB 411-California Ocean Plan (SWRCB 2005) states that the single sample maximum for Enterococcus shall not exceed 104 MPN/100 mL.
Objective/Criterion Reference: Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Pacific Ocean at Pismo Beach (San Luis Obispo County) was collected at one AB411 monitoring site (PB4)
Temporal Representation: Data was collected for 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 77673, Enterococcus
Region 3     
Pacific Ocean at Pismo State Beach (San Luis Obispo County), south of Pismo Pier
 
LOE ID: 20082
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 24
Number of Exceedances: 4
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Central Coast Regional Board Staff assessed data for Pacific Ocean at Pismo State Beach (San Luis Obispo County), south of Pismo Pier to determine beneficial use support and results are as follows: 4 of 24 samples exceed the criterion for Enterococci.
Data Reference: AB 411 Data for 2004
  AB 411 Data for 2005
  AB 411 Data for 2006
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2005) states that the geometric mean for Enterococcus shall not exceed 35 MPN/100 mL.
Objective/Criterion Reference: Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Pacific Ocean at Pismo Beach (San Luis Obispo County) was collected at one AB411 monitoring site (PB4)
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 77673, Enterococcus
Region 3     
Pacific Ocean at Pismo State Beach (San Luis Obispo County), south of Pismo Pier
 
LOE ID: 31438
 
Pollutant: Enterococcus
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 14
Number of Exceedances: 1
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Beach monitoring data was collected from April 2005 through October 2006. 14 dry month (April through October) geomeans calculated. 1 of the 14 geomeans exceeded the geomean water quality objective.
Data Reference: AB 411 Data for 2004
  AB 411 Data for 2005
  AB 411 Data for 2006
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: AB 411-California Ocean Plan (SWRCB 2005) states that the geometric mean for Enterococcus shall not exceed 35 MPN/100 mL.
Objective/Criterion Reference: Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Pacific Ocean at Pismo Beach (San Luis Obispo County) was collected at one AB411 monitoring site (PB4)
Temporal Representation: Data was collected for 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
78024
Region 3     
Pacific Ocean at Pismo State Beach (San Luis Obispo County), south of Pismo Pier
 
Pollutant: Fecal Coliform
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 water body was added to the 303(d) list in error in 2010. No new data were assessed for the 2014 listing cycle.

It should be noted that some , if not all, of the data associated with this decision are E. coli results that are evaluated using the Ocean Plan Objective for Fecal Coliform. This objective is higher than the USEPA recreation criteria for E. coli. Evaluation of the data using the Fecal Coliform Objective could result in an erroneous decision to remove the beach segment from the 303(d) List and are not used here as the basis of a decision to de-list.

Four lines of evidence are available in the administrative record to assess this pollutant. Five of 38 samples exceeded the geometric mean standard for fecal coliform (LOEs 20080 and 31436) and 32 of 196 samples exceeded the single sample maximum for fecal coliform (LOEs 20081 and 31437) 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 for removing this water segment-pollutant combination from 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 38 samples exceeded the geometric mean standard for fecal coliform (LOEs 20080 and 31436) and 32 of 196 samples exceeded the single sample maximum for fecal coliform (LOEs 20081 and 31437) for the water contact recreation water quality standard and this does not exceed the allowable frequency listed in Table 4.2 of the Listing Policy, but some of these data are for E. coli and are incorrectly compared to the Fecal Coliform Objective. Therefore the decision must remain Do Not De-List..
4. Pursuant to section 4.11 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 removed from the section 303(d) List because applicable water quality standards for the pollutant are not used in this assessment. Some of the data included here are E. coli data and those data should not be assessed using the Fecal Coliform Objective.
 
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 78024, Fecal Coliform
Region 3     
Pacific Ocean at Pismo State Beach (San Luis Obispo County), south of Pismo Pier
 
LOE ID: 31437
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 74
Number of Exceedances: 13
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Beach monitoring data was collected from April 2005 through October 2006. A total of 74 dry month (April through October) single samples were collected with 13 samples exceeding the water quality objective.
Data Reference: AB 411 Data for 2004
  AB 411 Data for 2005
  AB 411 Data for 2006
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: AB 411-California Ocean Plan (SWRCB 2005) states that the single sample maximum for fecal coliform shall not exceed 400 MPN/100 mL.
Objective/Criterion Reference: Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Pacific Ocean at Pismo Beach (San Luis Obispo County) was collected at one AB411 monitoring site (PB4)
Temporal Representation: Data was collected over the time period April 2005 - October 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 78024, Fecal Coliform
Region 3     
Pacific Ocean at Pismo State Beach (San Luis Obispo County), south of Pismo Pier
 
LOE ID: 20081
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 122
Number of Exceedances: 19
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Central Coast Regional Board Staff assessed data for Pacific Ocean at Pismo State Beach (San Luis Obispo County), south of Pismo Pier to determine beneficial use support and results are as follows: 19 of 122 samples exceed the criterion for Coliform, Fecal.
Data Reference: AB 411 Data for 2004
  AB 411 Data for 2005
  AB 411 Data for 2006
 
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: Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Pacific Ocean at Pismo Beach (San Luis Obispo County) was collected at one AB411 monitoring site (PB4)
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 78024, Fecal Coliform
Region 3     
Pacific Ocean at Pismo State Beach (San Luis Obispo County), south of Pismo Pier
 
LOE ID: 20080
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 24
Number of Exceedances: 3
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Central Coast Regional Board Staff assessed data for Pacific Ocean at Pismo State Beach (San Luis Obispo County), south of Pismo Pier to determine beneficial use support and results are as follows: 3 of 24 samples exceed the criterion for Coliform, Fecal.
Data Reference: AB 411 Data for 2005
  AB 411 Data for 2006
  AB 411 Data for 2004
 
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: Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Pacific Ocean at Pismo Beach (San Luis Obispo County) was collected at one AB411 monitoring site (PB4)
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 78024, Fecal Coliform
Region 3     
Pacific Ocean at Pismo State Beach (San Luis Obispo County), south of Pismo Pier
 
LOE ID: 31436
 
Pollutant: Fecal Coliform
LOE Subgroup: Pollutant-Water
Matrix: Water
Fraction: None
 
Beneficial Use: Water Contact Recreation
 
Number of Samples: 14
Number of Exceedances: 2
 
Data and Information Type: PATHOGEN MONITORING
Data Used to Assess Water Quality: Beach monitoring data was collected from April 2005 through October 2006. A total of 74 dry month (April through October) single samples were collected with 14 dry month geomeans calculated. 2 of the 14 geomeans exceeded the geomean water quality objective.
Data Reference: AB 411 Data for 2005
  AB 411 Data for 2006
  AB 411 Data for 2004
 
SWAMP Data: Non-SWAMP
 
Water Quality Objective/Criterion: AB-411 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: Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation: Data for this line of evidence for Pacific Ocean at Pismo Beach (San Luis Obispo County) was collected at one AB411 monitoring site (PB4)
Temporal Representation: Data was collected over the time period April 2005 - October 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):