1. Western Delta Diversion Gary W. Darling Delta Stewardship Council September 22, 2011 Delta Diablo Sanitation District

2. Who is DDSD? Medium-Sized Wastewater Treatment Plant: Average Flow 13 MGD One of the largest industrial recycled water plants in California 2011 Award: 7 th Year Platinum Peak Performance Award - achieved by less than 1% of wastewater treatment operations of same size or smaller nation-wide. Board of Directors is interested in creating new jobs and leading regional solutions Pacific Ocean DDSD Concord San Francisco

3. Who Am I? Sustainable Resource Developer (Photo of Gary?) Los Vaqueros Reservoir Freeport Regional Water Project 4 Coalitions with 40 Agencies - Regional Water Recycling - Regional Biosolids - East County IRWMP - Household Hazardous Waste Recycled Water Projects SF-EBMUD Intertie Diablo Innovation Alliance

4. May 2008 BDCP Letter When has DDSD been in the Delta Planning Process? February 2011 Delta Stewardship Letter 2008 June 30, 2011 Delta Stewardship “Out of Box” 2011

5. Suisun Bay Sacramento River Antioch San Pablo Bay San Francisco Bay Pittsburg Divert and Treat Small near term project Emergency Supply High Water Quality New Yield or Supplemental What is Our Theme? Include a Western Delta Diversion in the Delta Planning Process North Delta Conveyance

6. Suisun Bay Sacramento River Antioch San Pablo Bay San Francisco Bay Pittsburg Divert and Treat Larger Alternative Shorter Alignment Operational Flexibility High Quality (Recirculation) Potential New Yield What is Our Theme? Include a Western Delta Diversion in the Delta Planning Process North Delta Conveyance

7. Our Recommended Approach: Baby Steps Suisun Bay Sacramento River San Pablo Bay San Francisco Bay Fish Screen

8. This Western Delta Diversion Idea Creates Sustainable Jobs 20,000 10,000 1000 0 Construction Jobs 200 20 Sustainable Operating Jobs On-Going Jobs 20142020Time

9. Regional Assets: Water Technology Companies Regional Assets: Research Institutes And Universities

10. Regional Assets: Water Technology Companies Regional Assets: Research Institutes And Universities

11. Three Common Questions about a Western Delta Diversion What about the Delta and longfin smelt impacts? Isn’t the Western Delta water too salty? RO $CO2 What about the water rights for the agricultural and municipal intakes? Western Delta Other Municipals Agriculture

12. We have studied these issues at smaller scale

13. Study results to date for Western Delta Diversion: Costs to desalinate brackish water 1/3 of cost for seawater $1500 $550 Western Delta O&M Seawater Desal O&M 250 300 Other O&M Power Unit Cost ($/AF) 1200 Power 300 Other O&M Monterey Regional Desal Predesign Report, September 2011 RW Beck Report

14. Costs to desalinate decreasing REPUBLIC of SINGAPORE, July 12, 2011, Siemens announced a new process reducing desalting energy by over 50% compared to best available technology PERTH, AUSTRALIA, Sept. 4, 2011 -- Australia's first dedicated desalination research facility opened …will provide a venue for researching and developing new technologies for desalination, including the use of nanotechnology, solar power, recycling of desalination membranes, and monitoring of marine life.

15. Sacramento River North Study results to date for Western Delta Diversion: Adaptability and Reliability Antioch Pittsburg Suisun Bay San Pablo Bay San Francisco Bay

16. Sacramento River North Study results to date for Western Delta Diversion: Adaptability and Reliability Antioch Pittsburg Suisun Bay San Pablo Bay San Francisco Bay Drought: High

17. Sacramento River North Study results to date for Western Delta Diversion: Adaptability and Reliability Antioch Pittsburg Suisun Bay San Pablo Bay San Francisco Bay Sea Level Rise: High

18. Sacramento River North Study results to date for Western Delta Diversion: Adaptability and Reliability Antioch Pittsburg Suisun Bay San Pablo Bay San Francisco Bay Levee Failure: Very High

19. Sacramento River North Study results to date for Western Delta Diversion: Adaptability and Reliability Antioch Pittsburg Suisun Bay San Pablo Bay San Francisco Bay Drought/Dry Periods: Fish Friendly

20. Western Delta Diversion Alternative: zoned industrial land is available

21. WESTEAST WINWIN Western Delta Intake Provides: Adaptability for a Changing Delta Operational Flexibility to Avoid Fish Impacts

22. Sea Level Rise Levee Fails 0% Dry 100% Water Supply Reliability Reliability

23. Western Delta NEW Replacement CVP Yield (AF/yr) SWP Yield

24. Other Constituents of Concern RAW Other Constituents (ug/l) Treated Detect Non- Detect Water Quality Salts RAW Water Quality TDS (mg/l) Treated 10,000 1,000 10

25. Water Supply Salinity Baseline Salinity Salinity w/ Delta Diversion Less Salt In Less Salt Out Agricultural Salts

26. Brine disposal can be addressed effectively Suisun Bay Sacramento River Antioch San Pablo Bay San Francisco Bay Pittsburg North Salinity Brine At 15 psu ~2 Median x2 at Pittsburg ~25 Constituents of Concern (Metals, Pharmaceuticals, etc.) Intake Water Brine Discharge Mass of Constituents (lbs/day) No increase in mass loading Multi-port diffusers for rapid mixing required

27. Source: Initial Dual Conveyance Assessment - May 2008 California Department of Water Resources Bay-Delta Office BDCP: a Western Delta Alternative Benefits Shorter conveyance Upland soils vs. Delta peat soils Intake in much deeper water with strong flows Challenges Is it “fish friendly” with acceptable costs? Is it an emergency relief measure only? Is it an independent alternative?

28. Recommended Next Steps Delta Stewardship Council: Dedicate funds to the Science Program to independently study the fisheries issues Include in the emergency response planning List the project in the Council’s near-term actions and funding plan Include in the Delta Plan as an adaptive management project Submit it to BDCP as an alternative to big conveyance

29. Gary W. Darling Delta Diablo Sanitation District General Manager garyd@ddsd.org (925) 756-1920 Delta Diablo Sanitation District