# Draft 2008 California 303(d)/305(b) Integrated Report

# Supporting Information

## Regional Board 3 - Central Coast Region

Water Body Name: | Pacific Ocean at Stillwater Cove Beach
Water Body ID: | CAC3095004220041214174739
Water Body Type: | Coastal & Bay Shoreline

DECISION ID | 6276
Pollutant: | Indicator Bacteria
Final Listing Decision: | Delist from 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: | List on 303(d) list (TMDL required list)(2006)
Revision Status | Revised
Reason for Delisting: | Change from general pollutant to specific pollutant listing (e.g. metals to copper)
Impairment from Pollutant or Pollution: | Pollutant
Weight of Evidence: | This pollutant is being considered for removal from the section 303(d) list under section 4.1 of the Listing Policy. Under section 4.1 a single line of evidence is necessary to assess listing status. As of 2006, Pacific Ocean at Stillwater Cove Beach, is listed for Indicator Bacteria. It is not possible, in a general listing, to determine which specific pollutant is causing or contributing to a water quality impacts. There is sufficient justification for removing the general listings for Indicator Bacteria from the 303(d) list and replace this general listings with decisions for each of the specific pollutants that apply. See decisions for Enterococcus, E. coli, Fecal Coliform and Total Coliform.
RWQCB Board Decision / Staff Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should be removed from the section 303(d) list because It is not possible, in a general listing, to determine which specific pollutant is causing or contributing to a water quality impacts. This general listings will be replaced with decisions for each of the specific pollutants that apply
SWRCB Board Decision / Staff Recommendation: | N/A
USEPA Decision: | The USEPA final decision for the 2006 303(d) list was to list this water body segment for indicator bacteria.

Lines of Evidence (LOEs) for Decision ID 6276

LOE ID: | 372
Pollutant: | Total Coliform
LOE Subgroup: | Pollutant-Water
Matrix: | Water
Fraction: | Total
Beneficial Use: | Water Contact Recreation
Number of Samples: | 122
Number of Exceedances: |
Data and Information Type: | PATHOGEN MONITORING
Data Used to Assess Water Quality: | Monterey County collected 122 bacteria samples from 2001 through 2004 at Stillwater Cove Beach. None of 122 samples were in exceedance of the single sample criterion for total coliform (CCRWQCB, 2004d).
Data Reference: | Placeholder reference 2006 303(d)
Water Quality Objective/Criterion: |
Objective/Criterion Reference:
Evaluation Guideline: | AB411: The single sample maximum criterion for total coliform in marine waters = 10,000 MPN/100 ml.
Guideline Reference: | Placeholder reference 2006 303(d)
Spatial Representation: | Stillwater Cove Beach is between the Beach Club and the rocky outcropping at the south end of the cove in the community of Pebble Beach.
Temporal Representation: | Samples were collected from 4/2/2001 through 6/7/2004. As an AB411 beach, Stillwater Cove Beach was sampled weekly April 1 - October 31 and monthly November 1 - March 30.
Environmental Conditions: |
QAPP Information: | Monterey County Health Department, Division of Environmental Health QAPP
QAPP Information Reference(s):
LOE ID: | 378
Pollutant: | Enterococcus
LOE Subgroup: | Pollutant-Water
Matrix: | Water
Fraction: | None
Beneficial Use: | Water Contact Recreation
Number of Samples: | 81
Number of Exceedances: | 8
Data and Information Type: | PATHOGEN MONITORING
Data Used to Assess Water Quality: | Monterey County collected 122 bacteria samples from 2001 through 2004 at Stillwater Cove Beach. Thirty-day mean concentrations of Enterococcus were calculated. Eight of 81 means were in exceedance of the criteria (CCRWQCB, 2004d).
Data Reference: | Placeholder reference 2006 303(d)
Water Quality Objective/Criterion: |
Objective/Criterion Reference:
Evaluation Guideline: | AB411: Based on the mean of the logarithms of the results of at least five weekly samples during any 30-day sampling period, the density of Enterococcus in water from any sampling station at a public beach or public water contact sports area, shall not exceed 35 MPN/100 ml.
Guideline Reference: | Placeholder reference 2006 303(d)
Spatial Representation: | Stillwater Cove Beach is between the Beach Club and the rocky outcropping at the south end of the cove in the community of Pebble Beach.
Temporal Representation: | Samples were collected from 4/2/2001 through 6/7/2004. As an AB411 beach, Stillwater Cove Beach was sampled weekly April 1 - October 31 and monthly November 1 - March 30.
Environmental Conditions: |
QAPP Information: | Monterey County Health Department, Division of Environmental Health QAPP
QAPP Information Reference(s):
LOE ID: | 377
Pollutant: | Enterococcus
LOE Subgroup: | Pollutant-Water
Matrix: | Water
Fraction: | None
Beneficial Use: | Water Contact Recreation
Number of Samples: | 122
Number of Exceedances: | 7
Data and Information Type: | PATHOGEN MONITORING
Data Used to Assess Water Quality: | Monterey County collected 122 bacteria samples from 2001 through 2004 at Stillwater Cove Beach. Seven of 122 samples were in exceedance of the single sample criterion for Enterococcus (CCRWQCB, 2004d).
Data Reference: | Placeholder reference 2006 303(d)
Water Quality Objective/Criterion: |
Objective/Criterion Reference:
Evaluation Guideline: | AB411: The single sample maximum criterion for Enterococcus in marine waters = 104 MPN/100 ml.
Guideline Reference: | Placeholder reference 2006 303(d)
Spatial Representation: | Stillwater Cove Beach is between the Beach Club and the rocky outcropping at the south end of the cove in the community of Pebble Beach.
Temporal Representation: | Samples were collected from 4/2/2001 through 6/7/2004. As an AB411 beach, Stillwater Cove Beach was sampled weekly April 1 - October 31 and monthly November 1 - March 30.
Environmental Conditions: |
QAPP Information: | Monterey County Health Department, Division of Environmental Health QAPP
QAPP Information Reference(s):
LOE ID: | 370
Pollutant: | Total Coliform
LOE Subgroup: | Health Advisories
Matrix: | Not Specified
Fraction: | None
Beneficial Use: | Water Contact Recreation
Number of Samples: | 0
Number of Exceedances: | 0
Data and Information Type: | Not Specified
Data Used to Assess Water Quality: | Monterey County posted Rain Advisories for all beaches in the county on 15 occasions from 2000 to 2004. Each advisory was posted for several days surrounding rain events in the county (CCRWQCB, 2004d).
Data Reference: | Placeholder reference 2006 303(d)
Water Quality Objective/Criterion: | Assembly Bill 411: Weekly monitoring is required from April to October at all beaches with more than 50,000 annual visitors or at beaches located in areas adjacent to storm drains that flow during the summer. Some counties continue testing year round. Weekly samples must be tested for three indicator organisms: total coliform, fecal coliform, and enterococcus. Beaches that fail to meet the state's criteria for any one of the three indicators are to be posted with conspicuous warning signs to notify the public of health risks associated with swimming in these areas. Closings and advisories are issued on a discretionary basis. AB 411 requires the State Water Resources Control Board (SWRCB) to post monthly beach data from coastal counties throughout the state. The surveys list beach warnings, beach closures, and rain advisories resulting from bacterial contamination.
Objective/Criterion Reference: | Placeholder reference 2006 303(d)
Evaluation Guideline: |
Guideline Reference:
Spatial Representation: | The rain advisories are issued for all beaches in Monterey County, including Stillwater Cove Beach (between the Beach Club and the rocky outcropping at the south end of the cove in the community of Pebble Beach).
Temporal Representation: | Rain advisories for the beaches were issued from February 2000 through November 2004.
Environmental Conditions: |
QAPP Information: | Monterey County Health Department, Division of Environmental Health QAPP
QAPP Information Reference(s):
LOE ID: | 379
Pollutant: | Indicator Bacteria
LOE Subgroup: | Pollutant-Water
Matrix: | Water
Fraction: | Total
Beneficial Use: | Water Contact Recreation
Number of Samples: | 175
Number of Exceedances: | 18
Data and Information Type: | PATHOGEN MONITORING
Data Used to Assess Water Quality: | Available data indicate sufficient exceedances of bacterial indicator objectives. There were 18 out of 175 samples exceeding the single sample maximum for fecal coliform, and 13 out of 131 exceedances of the geomean for enterococci (USEPA, 2007).
Data Reference: | Placeholder reference 2006 303(d)
Water Quality Objective/Criterion: | Title 17 C.C.R. Section 7958 states: Based on a single sample, the density of bacteria in water from each sampling station at a public beach or public water contact sports area shall not exceed: (A) 1,000 total coliform bacteria per 100 milliliters, if the ratio of fecal/total coliform bacteria exceeds 0.1; or (B) 10,000 total coliform bacteria per 100 milliliters; or (C) 400 fecal coliform bacteria per 100 milliliters; or (D) 104 enterococcus bacteria per 100 milliliters. Based on the mean of the logarithms of the results of at least five weekly samples during any 30-day sampling period, the density of bacteria in water from any sampling station at a public beach or public water contact sports area, shall not exceed: (A) 1,000 total coliform bacteria per 100 milliliters; or (B) 200 fecal coliform bacteria per 100 milliliters; or (C) 35 enterococcus bacteria per 100 milliliters. (DHS, 1999)
Objective/Criterion Reference: | Placeholder reference 2006 303(d)
Evaluation Guideline: |
Guideline Reference:
Spatial Representation: | Station ID# MON70 (at Beach and Tennis Club)
Temporal Representation: | 04/02/2001-10/11/2005
Environmental Conditions: |
QAPP Information: | Data record: 2001-2005, Monterey County Health Dept.
QAPP Information Reference(s):
LOE ID: | 375
Pollutant: | Enterococcus
LOE Subgroup: | Health Advisories
Matrix: | Not Specified
Fraction: | None
Beneficial Use: | Water Contact Recreation
Number of Samples: | 0
Number of Exceedances: | 0
Data and Information Type: | Not Specified
Data Used to Assess Water Quality: | Monterey County posted Rain Advisories for all beaches in the county on 15 occasions from 2000 to 2004. Each advisory was posted for several days surrounding rain events in the county (CCRWQCB, 2004d).
Data Reference: | Placeholder reference 2006 303(d)
Water Quality Objective/Criterion: | Assembly Bill 411: Weekly monitoring is required from April to October at all beaches with more than 50,000 annual visitors or at beaches located in areas adjacent to storm drains that flow during the summer. Some counties continue testing year round. Weekly samples must be tested for three indicator organisms: total coliform, fecal coliform, and enterococcus. Beaches that fail to meet the state's criteria for any one of the three indicators are to be posted with conspicuous warning signs to notify the public of health risks associated with swimming in these areas. Closings and advisories are issued on a discretionary basis. AB 411 requires the State Water Resources Control Board (SWRCB) to post monthly beach data from coastal counties throughout the state. The surveys list beach warnings, beach closures, and rain advisories resulting from bacterial contamination.
Objective/Criterion Reference: | Placeholder reference 2006 303(d)
Evaluation Guideline: |
Guideline Reference:
Spatial Representation: | The rain advisories are issued for all beaches in Monterey County, including Stillwater Cove Beach (between the Beach Club and the rocky outcropping at the south end of the cove in the community of Pebble Beach).
Temporal Representation: | Rain advisories for the beaches were issued from February 2000 through November 2004.
Environmental Conditions: |
QAPP Information: | Monterey County Health Department, Division of Environmental Health QAPP
QAPP Information Reference(s):
LOE ID: | 371
Pollutant: | Total Coliform
LOE Subgroup: | Health Advisories
Matrix: | Not Specified
Fraction: | None
Beneficial Use: | Water Contact Recreation
Number of Samples: | 0
Number of Exceedances: | 0
Data and Information Type: | Not Specified
Data Used to Assess Water Quality: | Monterey County posted 21 warnings and advisories from 1999 through 2004 for high bacteria (fecal, and Enterococcus), log mean exceedances, and total/fecal bacteria ratio exceedances. Additionally, there was one closure due to a sewage spill in 2002. Each lasted for several days (CCRWQCB, 2004d).
Data Reference: | Placeholder reference 2006 303(d)
Water Quality Objective/Criterion: | Assembly Bill 411: Weekly monitoring is required from April to October at all beaches with more than 50,000 annual visitors or at beaches located in areas adjacent to storm drains that flow during the summer. Some counties continue testing year round. Weekly samples must be tested for three indicator organisms: total coliform, fecal coliform, and enterococcus. Beaches that fail to meet the state's criteria for any one of the three indicators are to be posted with conspicuous warning signs to notify the public of health risks associated with swimming in these areas. Closings and advisories are issued on a discretionary basis. AB 411 requires the State Water Resources Control Board (SWRCB) to post monthly beach data from coastal counties throughout the state. The surveys list beach warnings, beach closures, and rain advisories resulting from bacterial contamination.
Objective/Criterion Reference: | Placeholder reference 2006 303(d)
Evaluation Guideline: |
Guideline Reference:
Spatial Representation: | Stillwater Cove Beach is between the Beach Club and the rocky outcropping at the south end of the cove in the community of Pebble Beach.
Temporal Representation: | Warnings and advisories for Stillwater Cove Beach were posted from 1999-2004. One closure occurred in 2002.
Environmental Conditions: |
QAPP Information: | Monterey County Health Department, Division of Environmental Health QAPP
QAPP Information Reference(s):
LOE ID: | 376
Pollutant: | Enterococcus
LOE Subgroup: | Health Advisories
Matrix: | Not Specified
Fraction: | None
Beneficial Use: | Water Contact Recreation
Number of Samples: | 0
Number of Exceedances: | 0
Data and Information Type: | Not Specified
Data Used to Assess Water Quality: | Monterey County posted 21 warnings and advisories from 1999 through 2004 for high bacteria (fecal, and Enterococcus), log mean exceedances, and total/fecal bacteria ratio exceedances. Additionally, there was one closure due to a sewage spill in 2002. Each lasted for several days (CCRWQCB, 2004d).
Data Reference: | Placeholder reference 2006 303(d)
Water Quality Objective/Criterion: | Assembly Bill 411: Weekly monitoring is required from April to October at all beaches with more than 50,000 annual visitors or at beaches located in areas adjacent to storm drains that flow during the summer. Some counties continue testing year round. Weekly samples must be tested for three indicator organisms: total coliform, fecal coliform, and enterococcus. Beaches that fail to meet the state's criteria for any one of the three indicators are to be posted with conspicuous warning signs to notify the public of health risks associated with swimming in these areas. Closings and advisories are issued on a discretionary basis. AB 411 requires the State Water Resources Control Board (SWRCB) to post monthly beach data from coastal counties throughout the state. The surveys list beach warnings, beach closures, and rain advisories resulting from bacterial contamination.
Objective/Criterion Reference: | Placeholder reference 2006 303(d)
Evaluation Guideline: |
Guideline Reference:
Spatial Representation: | Stillwater Cove Beach is between the Beach Club and the rocky outcropping at the south end of the cove in the community of Pebble Beach.
Temporal Representation: | Warnings and advisories for Stillwater Cove Beach were posted from 1999-2004. One closure occurred in 2002.
Environmental Conditions: |
QAPP Information: | Monterey County Health Department, Division of Environmental Health QAPP
QAPP Information Reference(s):
LOE ID: | 373
Pollutant: | Total Coliform
LOE Subgroup: | Pollutant-Water
Matrix: | Water
Fraction: | Total
Beneficial Use: | Water Contact Recreation
Number of Samples: | 79
Number of Exceedances: | 0
Data and Information Type: | PATHOGEN MONITORING
Data Used to Assess Water Quality: | Monterey County collected 122 bacteria samples from 2001 through 2004 at Stillwater Cove Beach. Thirty-day mean concentrations of total coliform were calculated. None of 79 means were in exceedance of the criteria (CCRWQCB, 2004d).
Data Reference: | Placeholder reference 2006 303(d)
Water Quality Objective/Criterion: |
Objective/Criterion Reference:
Evaluation Guideline: | AB411: Based on the mean of the logarithms of the results of at least five weekly samples during any 30-day sampling period, the density of total coliform in water from any sampling station at a public beach or public water contact sports area, shall not exceed 1,000 MPN/100 ml.
Guideline Reference: | Placeholder reference 2006 303(d)
Spatial Representation: | Stillwater Cove Beach is between the Beach Club and the rocky outcropping at the south end of the cove in the community of Pebble Beach.
Temporal Representation: | Samples were collected from 4/2/2001 through 6/7/2004. As an AB411 beach, Stillwater Cove Beach was sampled weekly April 1 - October 31 and monthly November 1 - March 30.
Environmental Conditions: |
QAPP Information: | Monterey County Health Department, Division of Environmental Health QAPP
QAPP Information Reference(s):
LOE ID: | 374
Pollutant: | Total Coliform
LOE Subgroup: | Pollutant-Water
Matrix: | Water
Fraction: | Total
Beneficial Use: | Water Contact Recreation
Number of Samples: | 122
Number of Exceedances: | 3
Data and Information Type: | PATHOGEN MONITORING
Data Used to Assess Water Quality: | Monterey County collected 122 bacteria samples from 2001 through 2004 at Del Monte Beach. 30-day mean concentrations of total coliform were calculated. None of 77 means were in exceedance of the criteria. Three of 122 measurements were in violation of the criterion. All violations occurred in September of 2003 (CCRWQCB, 2004d).
Data Reference: | Placeholder reference 2006 303(d)
Water Quality Objective/Criterion: |
Objective/Criterion Reference:
Evaluation Guideline: | AB411: Based on a single sample, the density of total coliform in water from each sampling station at a public beach or public water contact sports area shall not exceed 1,000 MPN/100 ml, if the ratio of fecal/total coliform bacteria exceeds 0.1.
Guideline Reference: | Placeholder reference 2006 303(d)
Spatial Representation: | Stillwater Cove Beach is between the Beach Club and the rocky outcropping at the south end of the cove in the community of Pebble Beach.
Temporal Representation: | Samples were collected from 4/2/2001 through 6/7/2004. As an AB411 beach, Stillwater Cove Beach was sampled weekly April 1 - October 31 and monthly November 1 - March 30. All violations occurred in September of 2003.
Environmental Conditions: |
QAPP Information: | Monterey County Health Department, Division of Environmental Health QAPP
QAPP Information Reference(s):

DECISION ID | 15616
Pollutant: | Escherichia coli (E. Coli)
Final Listing Decision: | Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: | New Decision
Revision Status | Revised
Impairment from Pollutant or Pollution: | Pollutant
Weight of Evidence: | This pollutant is being considered for placement on the section 303(d) list under section 3.3 of the Listing Policy. Under section 3.3 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. When compared to the Ocean Plan Objectives for Water Contact Recreation, none of 4 samples exceeded the single sample maximum Objective. No geomean assessments were made because no two samples were collected with a given 30-day period. 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 section 303(d) list in the Water Quality Limited Segments category. 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. none of 4 samples exceeded the single sample maximum Objective and this does not exceed the allowable frequency listed in Table 3.2 of the Listing Policy. In addition, the sample size is insufficient to determine if the beneficial use is impaired. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff 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 because it cannot be determined if applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation: |
USEPA Decision: |

Lines of Evidence (LOEs) for Decision ID 15616

LOE ID: | 20003
Pollutant: | Escherichia coli (E. Coli)
LOE Subgroup: | Pollutant-Water
Matrix: | Water
Fraction: | None
Beneficial Use: | Water Contact Recreation
Number of Samples: | 4
Number of Exceedances: | 0
Data and Information Type: | PATHOGEN MONITORING
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed data for Pacific Ocean at Stillwater Cove Beach to determine beneficial use support and results are as follows: 0 of 4 samples exceed the criterion for Escherichia coli.
Data Reference: | AB 411 Data for 2004
| AB 411 Data for 2005
| AB 411 Data for 2006
Water Quality Objective/Criterion: | USEPA Ambient Water Quality Criteria for Bacteria -1986.
Objective/Criterion Reference: | Ambient Water Quality Criteria for Bacteria - 1986. EPA440/5-84-002
Evaluation Guideline: | Single sample maximum allowable density for E. coli in freshwater is 235 MPN/100mL (as stated in Table 4, page 15)
Guideline Reference: | Ambient Water Quality Criteria for Bacteria - 1986. EPA440/5-84-002
Spatial Representation: | Data for this line of evidence for Pacific Ocean at Stillwater Cove Beach was collected at one AB411 monitoring site (Stillwater Cove)
Temporal Representation: | Data was collected over the time period 2/1/2005 - 10/30/2006. 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 | 15618
Pollutant: | Fecal Coliform
Final Listing Decision: | Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: | New Decision
Revision Status | Revised
Impairment from Pollutant or Pollution: | Pollutant
Weight of Evidence: | This pollutant is being considered for placement on the section 303(d) list under section 3.3 of the Listing Policy. Under section 3.3 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. When compared to the Ocean Plan Objectives for Water Contact Recreation, 8 of 59 samples exceeded the single sample maximum Objective, 2 of 15 geomean assessments exceeded the geomean Objective. 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 section 303(d) list in the Water Quality Limited Segments category. 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. Eight of 59 samples exceeded the single sample maximum Objective, 2 of 15 geomean assessments exceeded the geomean Objective. Neither of these 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.
RWQCB Board Decision / Staff 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 because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation: |
USEPA Decision: |

Lines of Evidence (LOEs) for Decision ID 15618

LOE ID: | 19991
Pollutant: | Fecal Coliform
LOE Subgroup: | Pollutant-Water
Matrix: | Water
Fraction: | None
Beneficial Use: | Water Contact Recreation
Number of Samples: | 59
Number of Exceedances: | 8
Data and Information Type: | PATHOGEN MONITORING
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed data for Pacific Ocean at Stillwater Cove Beach to determine beneficial use support and results are as follows: 8 of 59 samples exceed the criterion for Coliform, Fecal.
Data Reference: | AB 411 Data for 2004
| AB 411 Data for 2005
| AB 411 Data for 2006
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 Stillwater Cove Beach was collected at one AB411 monitoring site (Stillwater Cove)
Temporal Representation: | Data was collected over the time period 2/1/2005 - 10/30/2006. 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):
LOE ID: | 19990
Pollutant: | Fecal Coliform
LOE Subgroup: | Pollutant-Water
Matrix: | Water
Fraction: | None
Beneficial Use: | Water Contact Recreation
Number of Samples: | 15
Number of Exceedances: | 2
Data and Information Type: | PATHOGEN MONITORING
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed data for Pacific Ocean at Stillwater Cove Beach to determine beneficial use support and results are as follows: 2 of 15 samples exceed the criterion for Coliform, Fecal.
Data Reference: | AB 411 Data for 2004
| AB 411 Data for 2005
| AB 411 Data for 2006
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 Stillwater Cove Beach was collected at one AB411 monitoring site (Stillwater Cove)
Temporal Representation: | Data was collected over the time period 2/1/2005 - 10/30/2006. 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 | 4679
Pollutant: | Total Coliform
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)(2006)
Revision Status | Revised
Impairment from Pollutant or Pollution: | Pollutant
Weight of Evidence: | This pollutant is being considered for placement on the section 303(d) list under section 3.3 of the Listing Policy. Under section 3.3 a single line of evidence is necessary to assess listing status. Eight lines of evidence are available in the administrative record to assess this pollutant. Five of the LOE summarize the data and information used in the 2006 assessment. The following is a summary of that information. None of 79 means were in exceedance of the criteria, 0 of 122 and 3 of 122 samples were in exceedance of the single sample criterion for Enterococcus, and these do not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. Twenty one advisories/warnings were posted from 1999 to 2003. Rain Advisories for all beaches in the county were posted on 15 occasions from 2000 to 2004. Three additional LOE summarize data collected weekly between February 2005 and October 2006. When compared to the Ocean Plan Objectives for Water Contact Recreation, none of 60 samples exceeded the single sample maximum Objective, none of 15 geomean assessments exceeded the geomean Objective and 2 of 59 exceeded the total to fecal coliform ratio Objective. 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 section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The Assembly Bill 411criteria used complies with the requirements of section 6.1.3 of the Policy. 2. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 3. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 4. Based on section 3.3 the site does not have significant bacterial toxicity and the pollutant is not likely to cause or contribute to the toxic effect. 5. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff 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 because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation: | After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards for the pollutant are not exceeded.
USEPA Decision: |

Lines of Evidence (LOEs) for Decision ID 4679

LOE ID: | 20005
Pollutant: | Total Coliform
LOE Subgroup: | Pollutant-Water
Matrix: | Water
Fraction: | None
Beneficial Use: | Water Contact Recreation
Number of Samples: | 15
Number of Exceedances: | 0
Data and Information Type: | PATHOGEN MONITORING
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed data for Pacific Ocean at Stillwater Cove Beach to determine beneficial use support and results are as follows: 0 of 15 samples exceed the criterion for Coliform, Total.
Data Reference: | AB 411 Data for 2004
| AB 411 Data for 2005
| AB 411 Data for 2006
Water Quality Objective/Criterion: | California Ocean Plan (2005) 30-day geometric mean standard for total coliform states that total coliform density shall not exceed 1,000 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 Stillwater Cove Beach was collected at one monitoring site (Stillwater Cove)
Temporal Representation: | Data was collected over the time period 2/1/2005 - 10/30/2006. 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):
LOE ID: | 20004
Pollutant: | Total Coliform
LOE Subgroup: | Pollutant-Water
Matrix: | Water
Fraction: | None
Beneficial Use: | Water Contact Recreation
Number of Samples: | 60
Number of Exceedances: | 0
Data and Information Type: | PATHOGEN MONITORING
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed data for Pacific Ocean at Stillwater Cove Beach to determine beneficial use support and results are as follows: 0 of 60 samples exceed the criterion for Coliform, Total.
Data Reference: | AB 411 Data for 2004
| AB 411 Data for 2005
| AB 411 Data for 2006
Water Quality Objective/Criterion: | California Ocean Plan (2005) single sample maximum states that total coliform density shall not exceed 10,000 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 Stillwater Cove Beach was collected at one monitoring site (Stillwater Cove)
Temporal Representation: | Data was collected over the time period 2/1/2005 - 10/30/2006. 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):
LOE ID: | 20006
Pollutant: | Total Coliform
LOE Subgroup: | Pollutant-Water
Matrix: | Water
Fraction: | None
Beneficial Use: | Water Contact Recreation
Number of Samples: | 59
Number of Exceedances: | 2
Data and Information Type: | PATHOGEN MONITORING
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed data for Pacific Ocean at Stillwater Cove Beach to determine beneficial use support and results are as follows: 2 of 59 samples exceed the criterion for Coliform, Total.
Data Reference: | AB 411 Data for 2004
| AB 411 Data for 2005
| AB 411 Data for 2006
Water Quality Objective/Criterion: | California Ocean Plan (2005) single sample maximum standard for total coliform states that total coliform density shall not exceed 1,000 MPN/100 mL when the fecal coliform/total coliform ratio exceeds 0.1.
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 Stillwater Cove Beach was collected at one monitoring site (Stillwater Cove)
Temporal Representation: | Data was collected over the time period 2/1/2005 - 10/30/2006. 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):
LOE ID: | 370
Pollutant: | Total Coliform
LOE Subgroup: | Health Advisories
Matrix: | Not Specified
Fraction: | None
Beneficial Use: | Water Contact Recreation
Number of Samples: | 0
Number of Exceedances: | 0
Data and Information Type: | Not Specified
Data Used to Assess Water Quality: | Monterey County posted Rain Advisories for all beaches in the county on 15 occasions from 2000 to 2004. Each advisory was posted for several days surrounding rain events in the county (CCRWQCB, 2004d).
Data Reference: | Placeholder reference 2006 303(d)
Water Quality Objective/Criterion: | Assembly Bill 411: Weekly monitoring is required from April to October at all beaches with more than 50,000 annual visitors or at beaches located in areas adjacent to storm drains that flow during the summer. Some counties continue testing year round. Weekly samples must be tested for three indicator organisms: total coliform, fecal coliform, and enterococcus. Beaches that fail to meet the state's criteria for any one of the three indicators are to be posted with conspicuous warning signs to notify the public of health risks associated with swimming in these areas. Closings and advisories are issued on a discretionary basis. AB 411 requires the State Water Resources Control Board (SWRCB) to post monthly beach data from coastal counties throughout the state. The surveys list beach warnings, beach closures, and rain advisories resulting from bacterial contamination.
Objective/Criterion Reference: | Placeholder reference 2006 303(d)
Evaluation Guideline: |
Guideline Reference:
Spatial Representation: | The rain advisories are issued for all beaches in Monterey County, including Stillwater Cove Beach (between the Beach Club and the rocky outcropping at the south end of the cove in the community of Pebble Beach).
Temporal Representation: | Rain advisories for the beaches were issued from February 2000 through November 2004.
Environmental Conditions: |
QAPP Information: | Monterey County Health Department, Division of Environmental Health QAPP
QAPP Information Reference(s):
LOE ID: | 372
Pollutant: | Total Coliform
LOE Subgroup: | Pollutant-Water
Matrix: | Water
Fraction: | Total
Beneficial Use: | Water Contact Recreation
Number of Samples: | 122
Number of Exceedances: |
Data and Information Type: | PATHOGEN MONITORING
Data Used to Assess Water Quality: | Monterey County collected 122 bacteria samples from 2001 through 2004 at Stillwater Cove Beach. None of 122 samples were in exceedance of the single sample criterion for total coliform (CCRWQCB, 2004d).
Data Reference: | Placeholder reference 2006 303(d)
Water Quality Objective/Criterion: |
Objective/Criterion Reference:
Evaluation Guideline: | AB411: The single sample maximum criterion for total coliform in marine waters = 10,000 MPN/100 ml.
Guideline Reference: | Placeholder reference 2006 303(d)
Spatial Representation: | Stillwater Cove Beach is between the Beach Club and the rocky outcropping at the south end of the cove in the community of Pebble Beach.
Temporal Representation: | Samples were collected from 4/2/2001 through 6/7/2004. As an AB411 beach, Stillwater Cove Beach was sampled weekly April 1 - October 31 and monthly November 1 - March 30.
Environmental Conditions: |
QAPP Information: | Monterey County Health Department, Division of Environmental Health QAPP
QAPP Information Reference(s):
LOE ID: | 373
Pollutant: | Total Coliform
LOE Subgroup: | Pollutant-Water
Matrix: | Water
Fraction: | Total
Beneficial Use: | Water Contact Recreation
Number of Samples: | 79
Number of Exceedances: | 0
Data and Information Type: | PATHOGEN MONITORING
Data Used to Assess Water Quality: | Monterey County collected 122 bacteria samples from 2001 through 2004 at Stillwater Cove Beach. Thirty-day mean concentrations of total coliform were calculated. None of 79 means were in exceedance of the criteria (CCRWQCB, 2004d).
Data Reference: | Placeholder reference 2006 303(d)
Water Quality Objective/Criterion: |
Objective/Criterion Reference:
Evaluation Guideline: | AB411: Based on the mean of the logarithms of the results of at least five weekly samples during any 30-day sampling period, the density of total coliform in water from any sampling station at a public beach or public water contact sports area, shall not exceed 1,000 MPN/100 ml.
Guideline Reference: | Placeholder reference 2006 303(d)
Spatial Representation: | Stillwater Cove Beach is between the Beach Club and the rocky outcropping at the south end of the cove in the community of Pebble Beach.
Temporal Representation: | Samples were collected from 4/2/2001 through 6/7/2004. As an AB411 beach, Stillwater Cove Beach was sampled weekly April 1 - October 31 and monthly November 1 - March 30.
Environmental Conditions: |
QAPP Information: | Monterey County Health Department, Division of Environmental Health QAPP
QAPP Information Reference(s):
LOE ID: | 374
Pollutant: | Total Coliform
LOE Subgroup: | Pollutant-Water
Matrix: | Water
Fraction: | Total
Beneficial Use: | Water Contact Recreation
Number of Samples: | 122
Number of Exceedances: | 3
Data and Information Type: | PATHOGEN MONITORING
Data Used to Assess Water Quality: | Monterey County collected 122 bacteria samples from 2001 through 2004 at Del Monte Beach. 30-day mean concentrations of total coliform were calculated. None of 77 means were in exceedance of the criteria. Three of 122 measurements were in violation of the criterion. All violations occurred in September of 2003 (CCRWQCB, 2004d).
Data Reference: | Placeholder reference 2006 303(d)
Water Quality Objective/Criterion: |
Objective/Criterion Reference:
Evaluation Guideline: | AB411: Based on a single sample, the density of total coliform in water from each sampling station at a public beach or public water contact sports area shall not exceed 1,000 MPN/100 ml, if the ratio of fecal/total coliform bacteria exceeds 0.1.
Guideline Reference: | Placeholder reference 2006 303(d)
Spatial Representation: | Stillwater Cove Beach is between the Beach Club and the rocky outcropping at the south end of the cove in the community of Pebble Beach.
Temporal Representation: | Samples were collected from 4/2/2001 through 6/7/2004. As an AB411 beach, Stillwater Cove Beach was sampled weekly April 1 - October 31 and monthly November 1 - March 30. All violations occurred in September of 2003.
Environmental Conditions: |
QAPP Information: | Monterey County Health Department, Division of Environmental Health QAPP
QAPP Information Reference(s):
LOE ID: | 371
Pollutant: | Total Coliform
LOE Subgroup: | Health Advisories
Matrix: | Not Specified
Fraction: | None
Beneficial Use: | Water Contact Recreation
Number of Samples: | 0
Number of Exceedances: | 0
Data and Information Type: | Not Specified
Data Used to Assess Water Quality: | Monterey County posted 21 warnings and advisories from 1999 through 2004 for high bacteria (fecal, and Enterococcus), log mean exceedances, and total/fecal bacteria ratio exceedances. Additionally, there was one closure due to a sewage spill in 2002. Each lasted for several days (CCRWQCB, 2004d).
Data Reference: | Placeholder reference 2006 303(d)
Water Quality Objective/Criterion: | Assembly Bill 411: Weekly monitoring is required from April to October at all beaches with more than 50,000 annual visitors or at beaches located in areas adjacent to storm drains that flow during the summer. Some counties continue testing year round. Weekly samples must be tested for three indicator organisms: total coliform, fecal coliform, and enterococcus. Beaches that fail to meet the state's criteria for any one of the three indicators are to be posted with conspicuous warning signs to notify the public of health risks associated with swimming in these areas. Closings and advisories are issued on a discretionary basis. AB 411 requires the State Water Resources Control Board (SWRCB) to post monthly beach data from coastal counties throughout the state. The surveys list beach warnings, beach closures, and rain advisories resulting from bacterial contamination.
Objective/Criterion Reference: | Placeholder reference 2006 303(d)
Evaluation Guideline: |
Guideline Reference:
Spatial Representation: | Stillwater Cove Beach is between the Beach Club and the rocky outcropping at the south end of the cove in the community of Pebble Beach.
Temporal Representation: | Warnings and advisories for Stillwater Cove Beach were posted from 1999-2004. One closure occurred in 2002.
Environmental Conditions: |
QAPP Information: | Monterey County Health Department, Division of Environmental Health QAPP
QAPP Information Reference(s):

DECISION ID | 4609
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)(2006)
Revision Status | Original
Impairment from Pollutant or Pollution: | Pollutant
Weight of Evidence: | This pollutant is being considered for placement on the section 303(d) list under section 3.3 of the Listing Policy. Under section 3.3 a single line of evidence is necessary to assess listing status. Six lines of evidence are available in the administrative record to assess this pollutant. Four of the LOEs describe data prior to 2005 and are summarized here. None of 76 means were in exceedance of the criteria, 8 of 81 samples were in exceedance of the single sample criterion for Enterococcus, and these do not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. Twenty one advisories/warnings were posted from 1999 to 2003. Rain Advisories for all beaches in the county were posted on 15 occasions from 2000 to 2004. Two additional LOE summarize weekly data collected between February 2005 and October 2006. Six of 60 samples were in exceedance of the single sample criterion for Enterococcus and 2 of 15 samples were in exceedance of the geomean criterion for Enterococcus. Based on section 3.3 the site does not have significant bacterial toxicity and the pollutant is not likely to cause or contribute to the toxic effect. 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 section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The Assembly Bill 411criteria used complies with the requirements of section 6.1.3 of the Policy. 2. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 3. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 4. Based on section 3.3 the site does not have significant bacterial toxicity and the pollutant is not likely to cause or contribute to the toxic effect. 5. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
RWQCB Board Decision / Staff 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 because applicable water quality standards are not being exceeded.
SWRCB Board Decision / Staff Recommendation: | After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards for the pollutant are not exceeded.
USEPA Decision: |

Lines of Evidence (LOEs) for Decision ID 4609

LOE ID: | 20001
Pollutant: | Enterococcus
LOE Subgroup: | Pollutant-Water
Matrix: | Water
Fraction: | None
Beneficial Use: | Water Contact Recreation
Number of Samples: | 60
Number of Exceedances: | 6
Data and Information Type: | PATHOGEN MONITORING
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed data for Pacific Ocean at Stillwater Cove Beach to determine beneficial use support and results are as follows: 6 of 60 samples exceed the criterion for Enterococci.
Data Reference: | AB 411 Data for 2004
| AB 411 Data for 2005
| AB 411 Data for 2006
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 Stillwater Cove Beach was collected at one AB411 monitoring site (Stillwater Cove)
Temporal Representation: | Data was collected over the time period 2/1/2005 - 10/30/2006. 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):
LOE ID: | 20000
Pollutant: | Enterococcus
LOE Subgroup: | Pollutant-Water
Matrix: | Water
Fraction: | None
Beneficial Use: | Water Contact Recreation
Number of Samples: | 15
Number of Exceedances: | 2
Data and Information Type: | PATHOGEN MONITORING
Data Used to Assess Water Quality: | Central Coast Regional Board Staff assessed data for Pacific Ocean at Stillwater Cove Beach to determine beneficial use support and results are as follows: 2 of 15 samples exceed the criterion for Enterococci.
Data Reference: | AB 411 Data for 2004
| AB 411 Data for 2005
| AB 411 Data for 2006
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 Stillwater Cove Beach was collected at one AB411 monitoring site (Stillwater Cove)
Temporal Representation: | Data was collected over the time period 2/1/2005 - 10/30/2006. 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):
LOE ID: | 375
Pollutant: | Enterococcus
LOE Subgroup: | Health Advisories
Matrix: | Not Specified
Fraction: | None
Beneficial Use: | Water Contact Recreation
Number of Samples: | 0
Number of Exceedances: | 0
Data and Information Type: | Not Specified
Data Used to Assess Water Quality: | Monterey County posted Rain Advisories for all beaches in the county on 15 occasions from 2000 to 2004. Each advisory was posted for several days surrounding rain events in the county (CCRWQCB, 2004d).
Data Reference: | Placeholder reference 2006 303(d)
Water Quality Objective/Criterion: | Assembly Bill 411: Weekly monitoring is required from April to October at all beaches with more than 50,000 annual visitors or at beaches located in areas adjacent to storm drains that flow during the summer. Some counties continue testing year round. Weekly samples must be tested for three indicator organisms: total coliform, fecal coliform, and enterococcus. Beaches that fail to meet the state's criteria for any one of the three indicators are to be posted with conspicuous warning signs to notify the public of health risks associated with swimming in these areas. Closings and advisories are issued on a discretionary basis. AB 411 requires the State Water Resources Control Board (SWRCB) to post monthly beach data from coastal counties throughout the state. The surveys list beach warnings, beach closures, and rain advisories resulting from bacterial contamination.
Objective/Criterion Reference: | Placeholder reference 2006 303(d)
Evaluation Guideline: |
Guideline Reference:
Spatial Representation: | The rain advisories are issued for all beaches in Monterey County, including Stillwater Cove Beach (between the Beach Club and the rocky outcropping at the south end of the cove in the community of Pebble Beach).
Temporal Representation: | Rain advisories for the beaches were issued from February 2000 through November 2004.
Environmental Conditions: |
QAPP Information: | Monterey County Health Department, Division of Environmental Health QAPP
QAPP Information Reference(s):
LOE ID: | 378
Pollutant: | Enterococcus
LOE Subgroup: | Pollutant-Water
Matrix: | Water
Fraction: | None
Beneficial Use: | Water Contact Recreation
Number of Samples: | 81
Number of Exceedances: | 8
Data and Information Type: | PATHOGEN MONITORING
Data Used to Assess Water Quality: | Monterey County collected 122 bacteria samples from 2001 through 2004 at Stillwater Cove Beach. Thirty-day mean concentrations of Enterococcus were calculated. Eight of 81 means were in exceedance of the criteria (CCRWQCB, 2004d).
Data Reference: | Placeholder reference 2006 303(d)
Water Quality Objective/Criterion: |
Objective/Criterion Reference:
Evaluation Guideline: | AB411: Based on the mean of the logarithms of the results of at least five weekly samples during any 30-day sampling period, the density of Enterococcus in water from any sampling station at a public beach or public water contact sports area, shall not exceed 35 MPN/100 ml.
Guideline Reference: | Placeholder reference 2006 303(d)
Spatial Representation: | Stillwater Cove Beach is between the Beach Club and the rocky outcropping at the south end of the cove in the community of Pebble Beach.
Temporal Representation: | Samples were collected from 4/2/2001 through 6/7/2004. As an AB411 beach, Stillwater Cove Beach was sampled weekly April 1 - October 31 and monthly November 1 - March 30.
Environmental Conditions: |
QAPP Information: | Monterey County Health Department, Division of Environmental Health QAPP
QAPP Information Reference(s):
LOE ID: | 377
Pollutant: | Enterococcus
LOE Subgroup: | Pollutant-Water
Matrix: | Water
Fraction: | None
Beneficial Use: | Water Contact Recreation
Number of Samples: | 122
Number of Exceedances: | 7
Data and Information Type: | PATHOGEN MONITORING
Data Used to Assess Water Quality: | Monterey County collected 122 bacteria samples from 2001 through 2004 at Stillwater Cove Beach. Seven of 122 samples were in exceedance of the single sample criterion for Enterococcus (CCRWQCB, 2004d).
Data Reference: | Placeholder reference 2006 303(d)
Water Quality Objective/Criterion: |
Objective/Criterion Reference:
Evaluation Guideline: | AB411: The single sample maximum criterion for Enterococcus in marine waters = 104 MPN/100 ml.
Guideline Reference: | Placeholder reference 2006 303(d)
Spatial Representation: | Stillwater Cove Beach is between the Beach Club and the rocky outcropping at the south end of the cove in the community of Pebble Beach.
Temporal Representation: | Samples were collected from 4/2/2001 through 6/7/2004. As an AB411 beach, Stillwater Cove Beach was sampled weekly April 1 - October 31 and monthly November 1 - March 30.
Environmental Conditions: |
QAPP Information: | Monterey County Health Department, Division of Environmental Health QAPP
QAPP Information Reference(s):
LOE ID: | 376
Pollutant: | Enterococcus
LOE Subgroup: | Health Advisories
Matrix: | Not Specified
Fraction: | None
Beneficial Use: | Water Contact Recreation
Number of Samples: | 0
Number of Exceedances: | 0
Data and Information Type: | Not Specified
Data Used to Assess Water Quality: | Monterey County posted 21 warnings and advisories from 1999 through 2004 for high bacteria (fecal, and Enterococcus), log mean exceedances, and total/fecal bacteria ratio exceedances. Additionally, there was one closure due to a sewage spill in 2002. Each lasted for several days (CCRWQCB, 2004d).
Data Reference: | Placeholder reference 2006 303(d)
Water Quality Objective/Criterion: | Assembly Bill 411: Weekly monitoring is required from April to October at all beaches with more than 50,000 annual visitors or at beaches located in areas adjacent to storm drains that flow during the summer. Some counties continue testing year round. Weekly samples must be tested for three indicator organisms: total coliform, fecal coliform, and enterococcus. Beaches that fail to meet the state's criteria for any one of the three indicators are to be posted with conspicuous warning signs to notify the public of health risks associated with swimming in these areas. Closings and advisories are issued on a discretionary basis. AB 411 requires the State Water Resources Control Board (SWRCB) to post monthly beach data from coastal counties throughout the state. The surveys list beach warnings, beach closures, and rain advisories resulting from bacterial contamination.
Objective/Criterion Reference: | Placeholder reference 2006 303(d)
Evaluation Guideline: |
Guideline Reference:
Spatial Representation: | Stillwater Cove Beach is between the Beach Club and the rocky outcropping at the south end of the cove in the community of Pebble Beach.
Temporal Representation: | Warnings and advisories for Stillwater Cove Beach were posted from 1999-2004. One closure occurred in 2002.
Environmental Conditions: |
QAPP Information: | Monterey County Health Department, Division of Environmental Health QAPP
QAPP Information Reference(s):