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Regional Approach to Maximize Reuse Opportunities in North San Diego County

Regional Approach to Maximize Reuse Opportunities in North San Diego County. Mitch Dion Rincon del Diablo Municipal Water District. October 19, 2011 ACWA Region 8, 9, 10. Overview of Presentation. Participating Agencies Goals of the Project Available Recycled Water Supplies

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Regional Approach to Maximize Reuse Opportunities in North San Diego County

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  1. Regional Approach to Maximize Reuse Opportunities in North San Diego County Mitch Dion Rincon del Diablo Municipal Water District October 19, 2011 ACWA Region 8, 9, 10

  2. Overview of Presentation • Participating Agencies • Goals of the Project • Available Recycled Water Supplies • Potential Recycled Water Demands • Long-Term (2030) Regional Options • Short-Term (2020) Projects • Recommendations/Next Steps

  3. Understanding San Diego Water Cheap and Easy are all Sold Out Diversification Is In

  4. San Diego County Water Authority

  5. Study Area / Location Map Oceanside Vista Carlsbad San Marcos Escondido Encinitas Solano Beach San Diego County

  6. Participating North County Agencies

  7. Wastewater Agencies (7)

  8. Water Agencies (8)

  9. Project Goals • Investigate opportunities for expanded use of Recycled Water • Involve multiple agencies from North County • Document effort in Facility Plan Report to use for pursuit of local, State, and Federal funding opportunities

  10. Scope of Planning Study • Compare supplies with projected demands • Consider regulatory requirements • Develop regional concepts to expand use of RW • Utilize existing systems • Seasonal Storage • Groundwater IPR • Reservoir Augmentation IPR • Prepare Recycled Water Facility Plan • Long-Term (2030) • Short-Term (2020)

  11. Regulatory Considerations Hydrologic Units/Subunits TDS Limits

  12. Current Recycled Water Setting • Available Recycled Water Supplies • Potential Non-Potable Water Demands • Existing Recycled Water Systems • Planned Recycled Water Systems

  13. Projected Wastewater Flow

  14. Planned Recycled Water Production

  15. Existing Recycled Water Use

  16. Build on Current Efforts Existing Recycled Water Systems

  17. Build on Current Efforts Planned Recycled Water Systems

  18. Potential Recycled Water Demand * Includes Indirect Potable Reuse demand

  19. Regional Long Term (2030) Options • Option A: Decentralized Supply • Use satellite WPRs • Option B: Centralized Supply • Utilize central/larger WWTP/WPRs • Option C: Seasonal Storage • 7 potential sites identified • Option D: Indirect Potable Reuse (IPR) • Groundwater • Surface Water Augmentation

  20. Option A: Decentralized Supply – Matching with demand

  21. Option B: Centralized Supply – Matching with demand

  22. Decentralized versus Centralized - Selection Criteria • Maximize Reuse • System Reliability • Adaptability • Institutional Complexity • Proximity of Supplies and Demands

  23. Decentralized versus Centralized - Evaluation Results Option A: Decentralized Preferred o

  24. Regional Long Term Option A: Decentralized Approach

  25. Long Term (2030) Option A Costs

  26. Option C - Seasonal Storage Figure 4-5Seasonal Non-Potable Recycled Water Demand Balanced with Wastewater Supply

  27. Potential Surface Storage Sites

  28. North Broadway (2,200 af) Squires Reservoir (1,100 af) Option A with Seasonal Storage Sites South Lake (500 af)

  29. Option D: Indirect Potable Reuse

  30. Mission Basin (10,000 af) Lake Wohlford (7,000 af) San Marcos Basin (4,600 af) Option A with Indirect Potable Reuse Sites San Dieguito Basin (4,500 af)

  31. Mission Basin (10,000 af) Lake Wohlford (7,000 af) North Broadway (2,200 af) San Marcos Basin (4,600 af) Squires Reservoir (1,100 af) Option A with Seasonal Storage and IPR Sites South Lake (500 af) San Dieguito Basin (4,500 af)

  32. Short Term (2020) Projects – Matching with demand

  33. Short-Term (2020) Projects

  34. Short Term (2020) Project Costs

  35. Recommendations • Additional study on seasonal storage sites • Additional study on IPR sites • Agencies to update individual planning for consistency with regional plan • Hydraulic analysis of regional system • Develop or refine existing inter-agency agreements • Consider programmatic type environmental document for regional project

  36. Current Status • Approved for $1.5 million to be included in San Diego regional grant application to State • Agencies began Federal lobbying funding efforts • Currently updating Regional Approach to include Camp Pendleton

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