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

# Supporting Information

## Regional Board 3 - Central Coast Region

Water Body Name: | Pacific Ocean at Marina State Beach
Water Body ID: | CAC3091201120041214182133
Water Body Type: | Coastal & Bay Shoreline

DECISION ID | 4622
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. Three lines of evidence are available in the administrative record to assess this pollutant. 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 AB411 criteria 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. Four of 15 samples exceeded the criteria of 70/100 ml and 0 of 15 samples exceeded the criteria of 230/100 ml; in another sample, 0 of 15 single samples were in exceedance of the criterion and these do not exceed the allowable frequency listed in Table 3.1 of the Listing Policy. The benthic community in this water body is not impacted. 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 4622

LOE ID: | 361
Pollutant: | Total Coliform
LOE Subgroup: | Pollutant-Water
Matrix: | Water
Fraction: | Total
Beneficial Use: | Shellfish Harvesting
Number of Samples: | 15
Number of Exceedances: | 4
Data and Information Type: | PATHOGEN MONITORING
Data Used to Assess Water Quality: | Monterey County collected monthly bacteria samples at Seaside State Beach. Although because samples are monthly there is only 1 sample in each 30-day period, there is no limit as to how many samples must be included in the 30-day median total coliform concentration. A ten percent total coliform concentration could not be calculated either, so this criterion was used as a single (monthly) sample comparison as well. Four of 15 samples exceeded the criteria of 70/100 ml and 0 of 15 samples exceeded the criteria of 230/100 ml (CCRWQCB, 2004d).
Data Reference: | Placeholder reference 2006 303(d)
Water Quality Objective/Criterion: | Central Coast RWQCB Basin Plan: At all areas where shellfish may be harvested for human consumption, the median total coliform concentration throughout the water column for any 30-day period shall not exceed 70/100 ml, nor shall more than ten percent of the samples collected during any 30-day period exceed 230/100 ml for a five-tube decimal dilution test or 330/100 ml when a three-tube decimal dilution test is used.
Objective/Criterion Reference: | Placeholder reference 2006 303(d)
Evaluation Guideline: |
Guideline Reference:
Spatial Representation: | Marina State Beach - West End of Reservation Road, City of Marina.
Temporal Representation: | Samples were collected monthly from 2/4/2003 through 6/1/2004.
Environmental Conditions: |
QAPP Information: | Monterey County Health Department, Division of Environmental Health QAPP
QAPP Information Reference(s):
LOE ID: | 360
Pollutant: | Total Coliform
LOE Subgroup: | Pollutant-Water
Matrix: | Water
Fraction: | Total
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: | Monterey County collected monthly samples at Marina State Beach in 2003 and 2004. None of the 15 single samples were in exceedance of the criterion (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: | Marina State Beach - West End of Reservation Road, City of Marina
Temporal Representation: | Samples were collected monthly from 2/4/2003 through 6/1/2004.
Environmental Conditions: |
QAPP Information: | Monterey County Health Department, Division of Environmental Health QAPP
QAPP Information Reference(s):
LOE ID: | 359
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 Marina State Beach (West End of Reservation Road, City of Marina).
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):