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Charting a course to

Charting a course to . Lake Tahoe TMDL Implementation Workshop 29 January 2008. Clarity. Describe overall TMDL process and review research effort and findings Introduce TMDL allocation, crediting, and regulatory concepts. Workshop Goals. Agenda.

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Charting a course to

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  1. Charting a course to Lake Tahoe TMDL Implementation Workshop 29 January 2008 Clarity

  2. Describe overall TMDL process and review research effort and findings Introduce TMDL allocation, crediting, and regulatory concepts Workshop Goals

  3. Agenda 9:30 AM - Welcome, Introductions, and Agenda Review 9:40 AM - Context –TMDL Process? 10.00 AM - Baseline Loading Estimates with Q & A 11:00 AM - Clarity Model Overview and Findings with Q & A 11:30 AM - Load Reduction Estimates with Q & A 12:30 – 1:30 Lunch (on your own) 1:30 PM - Continued Question & Answer Period 2:30 PM - TMDL Implementation & Allocation Components with Q & A 2:45 PM - Allocation Approach with Q & A 3:30 PM - Break 3:45 PM - TMDL Crediting, Tracking, and Verification 4:15 PM - Overarching Q & A and Next Steps 4:30 PM - adjourn

  4. The Lake Tahoe Total Maximum Daily Load A science-based plan for restoring Lake Tahoe’s famed clarity

  5. What pollutants are causing Lake Tahoe’s clarity loss? How much of each pollutant is reaching Lake Tahoe? How much of each pollutant can Lake Tahoe accept and still achieve the clarity goal? TMDL Core Questions Phase One – Pollutant Capacity and Existing Inputs

  6. What are the options for reducing pollutant inputs to Lake Tahoe? What strategy should we implement to reduce pollutant inputs to Lake Tahoe? TMDL Core Questions Phase Two – Pollutant Reduction Analysis and Planning

  7. Are the expected reductions of each pollutant to Lake Tahoe being achieved? Is the clarity of Lake Tahoe improving in response to actions to reduce pollutants? Can innovation and new information improve our strategy to reduce pollutants? TMDL Core Questions Phase Three – Implementation and Operation

  8. What the TMDL provides Watershed scale restoration planning Basin wide assessment of pollutant sources Relative estimates of load reduction potential Basin wide implementation concepts Load reduction targets and Secchi depth milestones Monitoring framework

  9. What the TMDL does not provide Regulatory requirements and permit details Jurisdiction specific implementation plans Prescriptive load reduction measures Detailed implementation costs Identified funding sources

  10. What will we do with the TMDL information? Identify load reduction and clarity milestones Set load and waste load allocations for fine sediment, nitrogen, and phosphorus Establish crediting/accounting mechanisms Guide future permit requirements

  11. Where are we in the TMDL process? 2007 – Technical Report & Pollutant Reduction Opportunity Report 2008 – Drafting Load Allocations with Stakeholder input and Peer Review on Final TMDL ; amend CA Municipal NPDES Permits with regard to the numeric concentration effluent limits and the compliance date 2009 – TMDL Adoption 2010 – Renew CA Municipal NPDES Permits

  12. 1st Clarity Challenge Existing Condition standard The Clarity Challenge: Reverse clarity decline and measurably improve clarity METERS FEET 60 20 80 30 100 120 40 1968 1988 2008 2028 20XX Year

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