| Water Body Name: | Pacific Ocean at Muir Beach |
| Water Body ID: | CAC2013001320070321192155 |
| Water Body Type: | Coastal & Bay Shoreline |
DECISION ID |
19253 |
Region 2 |
Pacific Ocean at Muir Beach |
||
| Pollutant: | Indicator Bacteria |
| 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)(2010) |
| Revision Status | Original |
| Sources: | Source Unknown |
| Expected TMDL Completion Date: | 2013 |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | Region 2 data was not included in the 2012 Integrated Report so all decisions are carried over from the 2010 listing cycle. |
| Regional Board Decision Recommendation: | No new data were assessed for 2012. The decision has not changed. |
| State Board Staff 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. |
|
|||||
| LOE ID: | 352 | ||||
| Pollutant: | Indicator Bacteria | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | Total | ||||
| Beneficial Use: | Water Contact Recreation | ||||
| Number of Samples: | 67 | ||||
| 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 12 out of 67 samples exceeding the geomean for total coliform, and 18 out of 67 exceedances of the geomean for enterococci (USEPA, 2007). | ||||
| Data Reference: | Placeholder reference 2006 303(d) | ||||
| SWAMP Data: | Non-SWAMP | ||||
| 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# MC200 | ||||
| Temporal Representation: | 04/03/2003-10/25/2005 | ||||
| Environmental Conditions: | |||||
| QAPP Information: | Data record: summers 2003-2005, Marin County Health Dept. | ||||
| QAPP Information Reference(s): | |||||