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Calleguas Creek Watershed Toxicity Work Plan

Calleguas Creek Watershed Toxicity Work Plan. Ashli Cooper Desai Chris Minton Larry Walker Associates. Background-Why are We Here?. Regulatory Requirements to Address Pollutants Impairing Watershed 303(d) List TMDL-Total Maximum Daily Load Calleguas Watershed Planning Process

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Calleguas Creek Watershed Toxicity Work Plan

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  1. Calleguas Creek Watershed Toxicity Work Plan Ashli Cooper Desai Chris Minton Larry Walker Associates

  2. Background-Why are We Here? • Regulatory Requirements to Address Pollutants Impairing Watershed • 303(d) List • TMDL-Total Maximum Daily Load • Calleguas Watershed Planning Process • Phase 2-Get rid of the impairments • Prepare Work Plans • Assign Lead Sub-committees • Get technical consultants and advisors

  3. Agricultural Sub-Committee • Lead Role in Addressing Toxicity Impairments • Identifying, organizing and soliciting input from stakeholders • Providing commitment to Regional Board to complete the work • Guiding, reviewing, and providing input on the process and technical work • Developing solutions to address toxicity impairments

  4. Technical Consultants and Advisors • Larry Walker Associates • Helped develop work plans with a subset of Calleguas watershed group • Provide technical work in support of committee’s activities • Technical Advisory Committee (TAC) • Independent experts • Provide technical review and input into work

  5. TMDL Work Plan Summary • Five Full TMDL Work Plans • Salts • Historic Pesticides and PCBs • Toxicity • Metals • Bacteria • Additional Pollutants and Work Plan Outlines • Administrative and Public Process • TMDL Tools (GIS, Modeling, etc.) • Sediment • Trash

  6. Toxicity Impairment • Why is toxicity an issue? • Impacts aquatic life • What needs to be done? • First need to figure out what pollutant(s) are causing the toxicity • Both in sediment and in water • Figure out the best way to prevent toxicity from occurring

  7. Ideas on Pollutants • Ammonia • POTWs and some agricultural activities • Historic Pesticides and PCBs (DDT, Chlordane, etc.) • Primarily in sediment • Diazinon and Chlorpyrifos • Residential and agricultural pesticide use

  8. Where are the best places to monitor for toxicity and when should monitoring be done? What types of activities may contribute ammonia and pesticides?

  9. What Needs to be Done? • Monitoring to identify pollutants • Pick monitoring locations and monitoring times • Identification of key stakeholders • Develop Toxicity Working Group • Develop MOA or other type of agreement • Pick Agriculture Expertise for TAC • Provide Information • What pesticides and fertilizers used where and when? • Irrigation practices • Spread the Word

  10. Stakeholders and TAC • Possible Stakeholders • Agriculture • Cities • POTWs • Navy • Department of Fish and Game/Wildlife • Environmental Groups • TAC Expertise • Agricultural Practice, BMPs, and Treatment Solutions • Fate and transport of pollutants

  11. Gathering Information • Timing of activities that might contribute to toxicity • Pesticide and fertilizer applications (residential and agriculture) • Irrigation practices-when would we be most likely to see runoff? • Where should monitoring be conducted? • Information is missing or unclear • Toxicity is a possibility

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