1. South Orange Coastal Ocean Desalination (SOCOD) Project Dana Point/Doheny Beach, California November 2010 Status

2. 2 Local Supplies Groundwater & Recycling Where Southern California Gets Its Water 50% Import - 50% Local Local Supplies LA Aqueduct (1913) Conservation Colorado River Aqueduct (1941) State Water Project Entitlement (1972) Transfers & Storage

3. MWDOC Member Agencies 14 cities 14 cities 11 water districts 11 water districts 1 private water company 1 private water company 1 community service district 1 community service district Orange County Water District Orange County Water District Total = 28 water Total = 28 water Population = 2.3 million Population = 2.3 million

4. Orange County Water Sources Source2009-10 AF% Natural Flows Rivers/Streams 133,000 21 Indirect Recycled (Santa Ana River)86,000 13 GWRS Purified Water 66,000 10 Draw on OCWD Groundwater Storage(23,000) -4 (added storage) Recycled–Direct (landscape irrig.)37,000 6 Imported for Replenishment26,000 4 Imported for Direct Use254,00040 Consumptive Use 579,000 90 Water Use Efficiency Programs 65,000 10 Total without WUE 644,000 100% 46% Local

5. Diemer Filtration Plant Water from the Water Importation Pipeline and South County Pipeline Water from the Joint Regional Water Supply System (JRWSS) Regional Imported Water System to South Orange County

6. Major Water Supply Issues in California Regulatory-imposed pumping restrictions have reduced State Water Project pumping by up to 50%; drought conditions have occurred; water allocations began July 1, 2009 Regulatory-imposed pumping restrictions have reduced State Water Project pumping by up to 50%; drought conditions have occurred; water allocations began July 1, 2009 Long-term resolution of Bay-Delta fix is uncertain at this time, but many years away Long-term resolution of Bay-Delta fix is uncertain at this time, but many years away Water recycling, development of other sources and water conservation are ALL NEEDED to close the supply gap Water recycling, development of other sources and water conservation are ALL NEEDED to close the supply gap Ocean desalination is one new source that needs to be developed in California and along other coastal States of the U.S. Ocean desalination is one new source that needs to be developed in California and along other coastal States of the U.S.

7. South Orange Coastal Ocean Desalination Project Concept Project Layout Layout

8. South Orange Coastal Ocean Desalination Project 15 million gallons per day meets about 25% of the 2025 water demands for: 15 million gallons per day meets about 25% of the 2025 water demands for: 1. Laguna Beach 2. San Clemente 3. San Juan Capistrano 4. Moulton Niguel WD 5. South Coast WD All five agencies can physically receive the water into their systems All five agencies can physically receive the water into their systems 1 5 4 3 2

9. SOCOD Participants Total Water Sources (acre-feet per year) Current%2035% Wells5,0027%9,73612% Recycled Water9,74313%13,42016% Ocean Water00%15,00018% Imported Water60,62180%44,87654% Total75,366100%83,032100%

10. South Orange Coastal Ocean Desalination Project NOT connected to a Coastal Power Plant NOT connected to a Coastal Power Plant Utilizes slant well intake system to be protective of the ocean environment Utilizes slant well intake system to be protective of the ocean environment Utilizes an EXISTING ocean outfall for brine discharge; makes discharge closer in salinity to that of the natural ocean water to improve mixing Utilizes an EXISTING ocean outfall for brine discharge; makes discharge closer in salinity to that of the natural ocean water to improve mixing Could be on-line in 2016 Could be on-line in 2016

11. South Orange Coastal Ocean Desalination Project Construction of a 15 million gallon per day Ocean Desalination Plant using a slant well subsurface intake to produce about 16,000 acre-feet per year of high quality drinking water is FEASIBLE Construction of a 15 million gallon per day Ocean Desalination Plant using a slant well subsurface intake to produce about 16,000 acre-feet per year of high quality drinking water is FEASIBLE Project cost = $136 million (Boyle Engineering, 2007) to $152 million with an allowance for San Juan Basin mitigation Project cost = $136 million (Boyle Engineering, 2007) to $152 million with an allowance for San Juan Basin mitigation Cost of water = $1287 per acre foot (Boyle Engineering, 2007) to $1356 per acre foot with mitigation. Cost of water = $1287 per acre foot (Boyle Engineering, 2007) to $1356 per acre foot with mitigation. MWDOC has an executed contract from MET to provide $250 per AF towards the cost of the water MWDOC has an executed contract from MET to provide $250 per AF towards the cost of the water

12. Test Slant Well Schematic Ocean Surface Land Surface Fresh Water 325 feet Test Slant Well Infiltration Drill Rig Ocean Bottom Main Aquifer 40 to 130 feet ± Salt Water 23 o 350 feet ±

13. Drilling Site at Doheny Beach

14. Dual Rotary Drill Rig

15. Welding Screen Joints

16. Objectives for Three Year Extended Pumping and Pilot Studies Start-up pumping of existing well in June 2010 to conduct study work Start-up pumping of existing well in June 2010 to conduct study work Extended pumping to pull in ocean water – 9 months Extended pumping to pull in ocean water – 9 months Validate groundwater model and beach wellfield capacity Validate groundwater model and beach wellfield capacity Address upstream groundwater impacts Address upstream groundwater impacts Assess water quality and microbial fouling Assess water quality and microbial fouling Confirm alluvial aquifer pretreatment capability Confirm alluvial aquifer pretreatment capability Evaluate water quality and post-treatment options Evaluate water quality and post-treatment options Conduct pilot plant study; develop process treatment specifications Conduct pilot plant study; develop process treatment specifications Conduct materials corrosion tests Conduct materials corrosion tests Refine Project cost estimates Refine Project cost estimates

17. Unloading Test Facility

18. Mobile Test Facility – Transformer and Panel

19. Intuitech Technician Working on RO Unit

20. Corrosion and Microbial Flow Test Apparatus

21. Intuitech – Electrical Control Unit

22. Slant Well Increase in Salinity (June through Oct 2010)

23. Questions? Thank you!