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Coastal San Luis Obispo County Water Quality Assessment May 15, 2008 Tamara Presser & Matt Thompson Storm Water Program Central Coast Regional Water Quality Control Board
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2 City of San Luis Obispo Coastal San Luis Obispo Communities: Morro Bay Pismo Beach Arroyo Grande Grover Beach Baywood – Los Osos CSD Oceano CSD
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3 Enrollment Schedule for City of San Luis Obispo Apr 17 Feb 27 9 weeks Phase V: Water Board Action Feb 26 Dec 1 13 weeks Phase IV: Water Board Staff Final Review and Posting of SWMP Nov 28 Oct 20 6 weeks Phase III: MS4 SWMP Redraft Oct 17 May 26 21 weeks Phase II: MS4 Finalization of Draft SWMP and Water Board Staff and Public SWMP Review May 23 Now 5 weeks Phase I: Water Board Staff Assessment of Water Quality Challenges EndBegin Length of Process Tasks
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4 Enrollment Schedule for Coastal San Luis Obispo County Feb 6 Dec 8 9 weeks Phase V: Water Board Action Dec 7 Sep 8 14 weeks Phase IV: Water Board Staff Final Review and Posting of SWMP Sep 5 Jul 28 6 weeks Phase III: MS4 SWMP Redraft Jul 25 May 26 9 weeks Phase II: MS4 Finalization of Draft SWMP and Water Board Staff and Public SWMP Review May 23 Now 5 weeks Phase I: Water Board Staff Assessment of Water Quality Challenges EndBegin Length of Process Tasks
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5 Pollutants of Concern (POCs) “POCs consist of any pollutants that exhibit one or more of the following characteristics (Municipal Phase II General Permit): Current loadings or historic deposits of the pollutant are impacting the beneficial uses of a receiving water Elevated levels of the pollutant are found in sediments of a receiving water and/or have the potential to bioaccumulate in organisms therein The detectable inputs of the pollutant are at concentrations or loads considered potentially toxic to humans and/or flora and fauna."
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6 Pollutants of Concern (POCs) Pollutants of concern found in urban runoff include (Municipal Phase II General Stormwater Permit): Sediments Non-sediment solids Nutrients Pathogens Oxygen-demanding substances Petroleum hydrocarbons Heavy metals Floatables Polycyclic aromatic hydrocarbons (PAHs) Trash Pesticides and herbicides
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7 POCs – City of San Luis Obispo Addressed in April 2007 Draft Management Plan Pathogens Nutrients Priority Organics Sediment Chlorine Oil and Grease Surfactants Trash
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8 POCs – City of San Luis Obispo Impaired Waterbodies No Yes – Address in SWMP EPA Approved TMDL Unknown Nitrate as Nitrate (NO3) Prefumo Creek Urban, Human, Birds and Bats Roosting in the Tunnel, Livestock Pathogens SLO WWTP, Agriculture Nutrients SLO WWTP Nitrate as Nitrate (NO3) San Luis Obispo Creek Potential Sources PollutantWaterbody
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9 POCs – City of San Luis Obispo Additional Concerns San Luis Obispo Creek Low Index of Biotic Integrity (IBI measure of biologic health based on the presence and quantity of various species) Organochlorine Pesticides Metals (Chromium) Prefumo Creek Pathogens Stenner Creek Pathogens Low Index of Biotic Integrity
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10 POCs – City of San Luis Obispo Additional Concerns FACACA Avila Beach, projection of San Luis Street FBBADA Avila Beach, projection of San Juan Street WetDryWetDryWetDry 2004 - 2005 2005 – 2006 2006 - 2007 Sampling Site Heal the Ocean: ‘Report Card’
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11 Possible Pollutant Sources – City of SLO Homeless encampments near San Luis Obispo Creek Animals in San Luis Obispo Creek Old sewer laterals Pet waste
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12 Future Projects – City of San Luis Obispo Orcutt Area Specific Plan – 231-acre development Prefumo Creek Commons Project 2007 Bicycle Transportation Plan Update South Broad St. Corridor Plan Margarita Area Transit-Oriented Development SLO Airport Re- Development Downtown Mixed- Use Projects Chinatown Project Chinatown Project Garden St. Garden St.
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13 Discussion What other water quality concerns can you identify that should be addressed in San Luis Obispo’s SWMP? Identify POCs & Sources
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14 POCs – Morro Bay Impaired Waterbodies Yes Agriculture, Channel Erosion, Channelization, Construction/Land Development, Resource Extraction Sedimentation/Siltati on Morro Bay (including Chorro Creek, Los Osos Creek, Morro Bay Estuary) Yes Natural Sources, Nonpoint Source, Range Grazing-Upland, Septage Disposal, Urban Runoff/Storm Sewers Pathogens Morro Bay (including Chorro Creek, Los Osos Creek) NoUnknown Dissolved Oxygen Morro Bay Approved TMDL Potential Sources PollutantWaterbody
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15 POCs – Morro Bay Additional Concerns Morro Creek Pathogens Toro Creek Pathogens Morro Bay Organochlorine Pesticides Metals (Arsenic, Cadmium)
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16 POCs – Morro Bay Additional Concerns CACABA Morro Bay City Beach, Morro Creek WetDryWetDryWetDry 2004 - 2005 2005 – 2006 2006 - 2007 Sampling Site Heal the Ocean: ‘Report Card’
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17 POCs – Morro Bay Additional Concerns Morro Bay National Estuary Program: ‘Stormwater Monitoring Report 2007’ – First Flush Sampling E. coli Turbidity pH Total Dissolved Solids (TDS) Orthophosphates Metals (Zinc, Copper, Nickel)
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18 Possible Pollutant Sources – Morro Bay Restaurant discharges Harbor activities Boat washing Street runoff Landscaping Business maintenance and repairs (ie. Power washing and painting related discharges) Construction Homeless encampments
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19 Discussion What other water quality concerns can you identify that should be addressed in the Morro Bay SWMP? Identify POCs & Sources
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20 POCs – Pismo Beach Impaired Waterbodies NoUnknownIndicatorBacteria Pacific Ocean at Pismo Beach Approved TMDL Potential Sources PollutantWaterbody
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21 POCs – Pismo Beach Additional Concerns Pismo Creek Pathogens Low Index of Biotic Integrity Heal the Ocean: ‘Report Card’ FBDACC Pismo Beach Pier, 50 feet south of pier WetDryWetDryWetDry 2004 - 2005 2005 – 2006 2006 - 2007 Sampling Site
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22 Possible Pollutant Sources – Pismo Beach Birds at Pismo Beach Homeless encampments Septic Systems Construction Landscape fertilizers Discharge of polluted groundwater to storm drains
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23 Future Projects – Pismo Beach Amendment to General Plan Land Use Element to include expansion opportunities for residential land use Mixed-use Developments: Price St. Price St. Five Cities Dr. Five Cities Dr.
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24 Discussion What other water quality concerns can you identify that should be addressed in Pismo Beach’s SWMP? Identify POCs & Sources
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25 POCs – Arroyo Grande Concerns Arroyo Grande Creek High Toxicity Levels Pathogens Index of Biotic Integrity
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26 Possible Pollutant Sources – Arroyo Grande None identified so far.
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27 Future Projects – Arroyo Grande Newsom Springs Regional Master Drainage Plan – Stormwater drainage improvements to reduce city flooding (project area: 1,240 acres)
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28 Discussion What other water quality concerns can you identify that should be addressed in Arroyo Grande’s SWMP? Identify POCs & Sources
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29 POCs – Grover Beach None identified so far.
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30 Discussion What water quality concerns can you identify that should be addressed in Grover’s SWMP? Identify POCs & Sources
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31 POCs – Baywood/Los Osos Impaired Waterbodies Yes Agriculture, Channel Erosion, Channelization, Construction/Land Development, Resource Extraction Sedimentation/Siltation Morro Bay (including Chorro Creek, Los Osos Creek, Morro Bay Estuary) Yes Natural Sources, Nonpoint Source, Range Grazing- Upland, Septage Disposal, Urban Runoff/Storm Sewers Pathogens Morro Bay (including Chorro Creek, Los Osos Creek) NoUnknown Dissolved Oxygen Morro Bay Approved TMDL Potential Sources PollutantWaterbody
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32 POCs – Baywood/Los Osos Additional Concerns Morro Bay Organochlorine Pesticides Metals (Arsenic, Cadmium)
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33 POCs – Baywood/Los Osos Additional Concerns Morro Bay National Estuary Program: ‘Stormwater Monitoring Report 2007’ – First Flush Sampling E. coli Turbidity Total Suspended Solids (TSS) Total Dissolved Solids (TDS) Orthophosphates Dissolved Metals (Zinc, Copper, Nickel)
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34 Possible Pollutant Sources – Baywood/Los Osos High septic system density
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35 Discussion What other water quality concerns can you identify that should be addressed in the Baywood – Los Osos SWMP? Identify POCs & Sources
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36 References CCAMP (http://www.ccamp.org/) 2006 303(d) Listings (http://www.waterboards.ca.gov/water_issues/programs/tmdl/ docs/303dlists2006/epa/state_usepa_combined.pdf) TMDLs (http://www.swrcb.ca.gov/centralcoast/TMDL/303dandTMDLp rojects.htm) Heal the Bay (http://www.healthebay.org/) Morro Bay National Estuary Program’s Implementation Effectiveness Program (http://www.mbnep.org/files/2007%20Stormwater%20Monitori ng%20Report%20final.pdf) County of San Luis Obispo Public Works City of San Luis Community Development
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37 Questions? Tamara Presser (805) 549-3334 TPresser@waterboards.ca.gov MS4 Enrollment Strategy Website: http://www.waterboards.ca.gov/centralcoast/s tormwater/municipal/phase_2/ms4enrollme nt/enrollment_strategy_index.htm
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