| Water Body Name: | MacKerricher State Park (near Mill Creek) |
| Water Body ID: | CAC1132005220081013230607 |
| Water Body Type: | Coastal & Bay Shoreline |
DECISION ID |
121603 |
Region 1 |
MacKerricher State Park (near Mill Creek) |
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| Pollutant: | Trash |
| 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 |
| Regional Board Conclusion: | This pollutant is being considered for placement on the CWA section 303(d) List under section 3.7 of the Listing Policy. One line of evidence is available to assess this pollutant. For trash data, there is no appropriate interpretive evaluation guideline that meets the requirements set forth in Section 6.1.3 of the Listing Policy for ocean beaches in the North Coast Region. Without an appropriate evaluation guideline, it is not possible to determine if the quantity of trash collected on the beach constitutes an exceedance of the trash water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is insufficient information to place this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. It is unknown if the data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. It is unknown if the data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. An evaluation guideline meeting the requirements of Section 6.1.3 of the Listing Policy was unavailable. 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 decision was made by SWRCB staff. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | After review of the available data and information, SWCRB staff conclude that there is insufficient information to place this waterbody-pollutant combination on the 303(d) list. |
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| LOE ID: | 198734 | ||||
| Pollutant: | Trash | ||||
| LOE Subgroup: | Pollutant-Nuisance | ||||
| Matrix: | -N/A | ||||
| Fraction: | None | ||||
| Beneficial Use: | Non-Contact Recreation | ||||
| Number of Samples: | 0 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | Not Specified | ||||
| Data Used to Assess Water Quality: | Volunteers collected trash, categorized the types, and provided the total weight of all trash in pounds, during one-day cleanup events on 09/25/2010, 09/15/2012, 09/21/2013, 09/20/2014, and 9/19/2015, with totals of 86, 46, 45, 70, and 3 lbs., respectively. There were counts of numbers of pieces of 41 separate categories of trash (e.g., cigarette butts, bottles, grocery bags). | ||||
| Data Reference: | Dataset provided by the Center for Biological Diversity. Contains trash data from California Coastal Comission-sponsored beach cleanup days in the North Coast Region at nine sites: Clam Beach County Park, North Jetty/Samoa Dunes Recreation Area, South Jetty/South Spit, Trinidad State Beach, Glass Beach, MacKerricher State Park, Ten Mile Beach, North Salmon Creek Beach, and South Salmon Creek Beach. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | Trash shall not be present in ocean waters, along shorelines or adjacent areas in amounts that adversely affect beneficial uses or cause nuisance. (California Ocean Plan, 2019). | ||||
| Objective/Criterion Reference: | SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019 | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | A single set of coordinates was provided, representing an unspecified area of MacKerricker State Park: Latitude, 39.4943; longitude, -123.793. | ||||
| Temporal Representation: | Samples were taken on five different one-day cleanup events on 9/25/2010, 09/15/2012, 09/21/2013, 09/20/2014, and 9/19/2015. | ||||
| Environmental Conditions: | |||||
| QAPP Information: | A "Site Captain Guide" document was provided, which included instructions to volunteers for a trash clean-up day. The document does not meet Listing Policy guidelines as a QAPP document. | ||||
| QAPP Information Reference(s): | Site Captain Guide 2017 | ||||
DECISION ID |
168861 |
Region 1 |
MacKerricher State Park (near Mill Creek) |
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| 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)(2018) |
| Revision Status | Original |
| Reason for Delisting: | Applicable WQS attained; according to new assessment method |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Conclusion: | In accordance with section 6.1.5.3 of the Listing Policy, data should be representative of the critical timing that the pollutant is expected to impact the waterbody. Lacking constant inputs, indicator bacteria do not persist in the environment for a long period and effects are of relatively short duration. As a result, the historic levels of bacteria in the waterbody may be a poor indicator of current risks to human health, particularly when more recent data are available to sufficiently assess the water quality standard. Historic lines of evidence for data collected prior to October 21, 2012 were evaluated pursuant to these considerations and were not used to assess water quality standards attainment because they do not meet the temporal representation requirements of section 6.1.5.3 of the Listing Policy. This pollutant is being considered for removal from the CWA section 303(d) List under section 4.2 of the Listing Policy. Under this section a single line of evidence is necessary to assess listing status. Thirteen lines of evidence are available in the administrative record to assess this pollutant. Geometric means are used to assess the data for the REC-1 beneficial use. Where geometric means are not available, statistical threshold values are used. Geometric means are available for MacKerricher State Park near Mill Creek and will be used for the assessment. Four line of evidence are available in the administrative record. Two lines of evidence are available in the administrative record to assess the REC-1 beneficial use. All Enterococcus data was collected prior to 2012. For the REC-1 beneficial use historic data, 2 of 186 geometric means exceed the Enterococcus objective. Two lines of evidence are available in the administrative record to assess the SHELL beneficial use. Data was collected on or after October 21, 2012. For the SHELL beneficial use, 2 of 4 medians exceed the Total Coliform objective. For the SHELL beneficial use, 0 of 4 SSMs exceed the Total Coliform objective. 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. For the REC-1 beneficial use enterococcus geomean, 2 of 186 samples exceed the objective; for the SHELL beneficial use total coliform median concentration, 2 of 4 medians exceed the objective; and for the SHELL beneficial use total coliform SSM, 0 of 4 SSMs exceed the objective, and this does not exceed 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 not met. |
| Regional Board Decision 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 applicable water quality standards for the pollutant are not being exceeded. |
| State Board Review of Regional Board Conclusion and Recommendation: | |
| State Board Decision Recommendation: | |
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| LOE ID: | 353469 | ||||
| Pollutant: | Total Coliform | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | Median | ||||
| Beneficial Use: | Shellfish Harvesting | ||||
| Number of Samples: | 4 | ||||
| Number of Exceedances: | 2 | ||||
| Data and Information Type: | PATHOGEN MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Beachwatch_Mendocino County data to determine beneficial use support and the results are as follows: 2 of the 4 samples exceeded the water quality standard for Total Coliform. The water quality standard for shellfish is based on the median concentration of Total Coliform at each station, and is calculated on a monthly basis. | ||||
| Data Reference: | Mendocino County Beachwatch data reformatted and renamed to match CEDEN fields. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | California Ocean Plan (SWRCB 2018) states that the median concentration of total coliform samples shall not exceed 70 per 100 ml. | ||||
| Objective/Criterion Reference: | California Ocean Plan Water Quality Control Plan Ocean Waters of California 2009 | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | The samples were collected at 1 monitoring site(s), station(s): MacKerricher | ||||
| Temporal Representation: | The samples were assessed for the ten years before the close of data solicitation (2012-10-21 to 2022-10-21). | ||||
| Environmental Conditions: | |||||
| QAPP Information: | Data exempt from QAPP requirement. Draft QAPP for Mendocino County Beachwatch data used instead. Represents data collection procedure prior to development of a formal QAPP. | ||||
| QAPP Information Reference(s): | Draft QAPP for Mendocino County Beachwatch. Represents data collection procedure prior to development of a formal QAPP. | ||||
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| LOE ID: | 25320 | ||||
| Pollutant: | Enterococcus | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | Total | ||||
| Beneficial Use: | Water Contact Recreation | ||||
| Number of Samples: | 74 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PATHOGEN MONITORING | ||||
| Data Used to Assess Water Quality: | None of the 74 single samples of enterococcus collected at MacKerricher State Park exceed the objective. Additionally, none of the 24 30-day geomean values exceed the objective. The single sample and geomean values are two different matrices used Mendocino County Division of Environmental Health in accordance with AB411 (Chapter 765, Statutes of 1997) requirements. Data is maintained by the State Water Board's Beach Watch program. Data is summarized by the North Coast Regional Water Board (North Coast RWQCB 2007). | ||||
| Data Reference: | North Coast Beach Watch Data. Bacteria data collected by Del Norte County, Humboldt County, Mendocino County Environmental Health Division, Sonoma County Division of Environmental Health, and Marin County in accordance with AB411. Data managed by the State Water Resources Control Board's Beach Watch program at beachwatch.waterboards.ca.gov. Includes data from 2004 to 2006 | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | Per the Ocean Plan (SWRCB 2005): The following bacterial objectives shall be maintained throughout the water column. The following standard is based on the 30-day geometric mean of the 5 most recent samples from each site: Enterococcus density shall not exceed 35 MPN per 100ml. The following standard is for the single sample maximum: Enterococcus density shall not exceed 104 per 100 ml. *Note: MPN is the most probable number of coliform units. | ||||
| 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: | Samples were collected at MacKerricher State Park . | ||||
| Temporal Representation: | Samples were collected weekly from July to October 2005 and April to October 2006. | ||||
| Environmental Conditions: | Samples were collected during the dry season. Otherwise, there are no known environmental conditions (e.g., land use practices, fire events, storms, etc.) that are related to these data. | ||||
| QAPP Information: | Samples were collected and analyzed in accordance with the Sampling and Analysis Plan and the Laboratories and Laboratory Analyses procedures described in the "Draft Guidance for Salt Water Beaches" (DHS 2006). | ||||
| QAPP Information Reference(s): | Draft Guidance for Salt Water Beaches. Last Update: April 10, 2006. Initial Draft: November 1997. Division of Drinking Water and Environmental Management, California Department of Health Services | ||||
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| LOE ID: | 353470 | ||||
| Pollutant: | Total Coliform | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | Percent | ||||
| Beneficial Use: | Shellfish Harvesting | ||||
| Number of Samples: | 4 | ||||
| Number of Exceedances: | 0 | ||||
| Data and Information Type: | PATHOGEN MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Beachwatch_Mendocino County data to determine beneficial use support and the results are as follows: 0 of the 4 samples exceeded the water quality standard for Total Coliform. The water quality standard for shellfish is based on the percent of Total Coliform at each station that exceed 230 per 100 mL, and is calculated on a monthly basis. | ||||
| Data Reference: | Mendocino County Beachwatch data reformatted and renamed to match CEDEN fields. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | California Ocean Plan (SWRCB 2018) states that not more than 10 percent of the samples shall exceed 230 per 100 mL. | ||||
| Objective/Criterion Reference: | California Ocean Plan Water Quality Control Plan Ocean Waters of California 2009 | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | The samples were collected at 1 monitoring site(s), station(s): MacKerricher | ||||
| Temporal Representation: | The samples were assessed for the ten years before the close of data solicitation (2012-10-21 to 2022-10-21). | ||||
| Environmental Conditions: | |||||
| QAPP Information: | Data exempt from QAPP requirement. Draft QAPP for Mendocino County Beachwatch data used instead. Represents data collection procedure prior to development of a formal QAPP. | ||||
| QAPP Information Reference(s): | Draft QAPP for Mendocino County Beachwatch. Represents data collection procedure prior to development of a formal QAPP. | ||||
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| LOE ID: | 133669 | ||||
| Pollutant: | Enterococcus | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Water Contact Recreation | ||||
| Number of Samples: | 112 | ||||
| Number of Exceedances: | 2 | ||||
| Data and Information Type: | PATHOGEN MONITORING | ||||
| Data Used to Assess Water Quality: | Water Board staff assessed Beachwatch_Mendocino County data for MacKerricher State Park (near Mill Creek) to determine beneficial use support and the results are as follows: 2 of the 112 samples exceeded the geomean water quality standard for Enterococcus. This is a six week rolling geomean that is calculated weekly. | ||||
| Data Reference: | Mendocino County Beachwatch data reformatted and renamed to match CEDEN fields. | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The bacteria water quality objective to protect the REC-1 beneficial for all ocean waters , is a six-week rolling GM of Enterococci not to exceed 30 cfu/100mL (calculated weekly). | ||||
| Objective/Criterion Reference: | California Ocean Plan Water Quality Control Plan Ocean Waters of California 2009 | ||||
| Evaluation Guideline: | |||||
| Guideline Reference: | |||||
| Spatial Representation: | The samples were collected at 1 monitoring site(s), station(s): MacKerricher | ||||
| Temporal Representation: | The samples were collected between the days of 2003-01-15 and 2011-04-05 . | ||||
| Environmental Conditions: | |||||
| QAPP Information: | Data exempt from QAPP requirement. Draft QAPP for Mendocino County Beachwatch data used instead. Represents data collection procedure prior to development of a formal QAPP. | ||||
| QAPP Information Reference(s): | Draft QAPP for Mendocino County Beachwatch. Represents data collection procedure prior to development of a formal QAPP. | ||||