South Orange Coastal Ocean South Orange Coastal Ocean Desalination (SOCOD) ProjectDesalination (SOCOD) Project

Dana Point/Doheny Beach, CaliforniaDana Point/Doheny Beach, California

November 2010 StatusNovember 2010 Status

2

Local Supplies Groundwater & Recycling

Where Southern CaliforniaGets Its Water

50% Import - 50% Local

Local SuppliesLA Aqueduct (1913)

Conservation

Colorado River Aqueduct (1941)

StateWater Project Entitlement (1972)

Transfers & Storage

MWDOC MWDOC Member Member AgenciesAgencies

• 14 cities14 cities• 11 water districts11 water districts• 1 private water company1 private water company• 1 community service 1 community service

districtdistrict• Orange County Water Orange County Water

DistrictDistrict• Total = 28 water Total = 28 water

• Population = 2.3 millionPopulation = 2.3 million

Orange County Water SourcesOrange County Water SourcesSourceSource 2009-10 AF2009-10 AF %%

Natural Flows Rivers/StreamsNatural Flows Rivers/Streams 133,000 133,000 2121

Indirect Recycled (Santa Ana River)Indirect Recycled (Santa Ana River) 86,00086,000 1313

GWRS Purified WaterGWRS Purified Water 66,00066,000 1010

Draw on OCWD Groundwater StorageDraw on OCWD Groundwater Storage (23,000) (23,000) -4 -4 (added (added storage)storage)

Recycled–Direct (landscape irrig.)Recycled–Direct (landscape irrig.) 37,000 37,000 6 6

Imported for ReplenishmentImported for Replenishment 26,00026,000 4 4

Imported for Direct UseImported for Direct Use 254,000254,000 4040

Consumptive Use Consumptive Use 579,000 579,000 9090

Water Use Efficiency ProgramsWater Use Efficiency Programs 65,000 65,000 10 10

Total without WUETotal without WUE 644,000 100% 644,000 100%

46% Local

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

Major Water Supply Issues in CaliforniaMajor Water Supply Issues in California

• Regulatory-imposed pumping restrictions have reduced Regulatory-imposed pumping restrictions have reduced State Water Project pumping by up to 50%; drought State Water Project pumping by up to 50%; drought conditions have occurred; water allocations began July conditions have occurred; water allocations began July 1, 20091, 2009

• Long-term resolution of Bay-Delta fix is uncertain at this Long-term resolution of Bay-Delta fix is uncertain at this time, but many years awaytime, but many years away

• Water recycling, development of other sources and Water recycling, development of other sources and water conservation are water conservation are ALL NEEDEDALL NEEDED to close the supply to close the supply gapgap

• Ocean desalination is one new source that needs Ocean desalination is one new source that needs to be developed in California and along other to be developed in California and along other coastal States of the U.S.coastal States of the U.S.

South Orange South Orange Coastal Ocean Coastal Ocean Desalination Desalination

ProjectProject

Concept ProjectConcept Project LayoutLayout

South Orange South Orange Coastal Ocean Coastal Ocean Desalination Desalination

ProjectProject• 15 million gallons per day 15 million gallons per day

meets about 25% of the meets about 25% of the 2025 water demands for:2025 water demands for:

1. Laguna Beach1. Laguna Beach2. San Clemente2. San Clemente3. San Juan Capistrano3. San Juan Capistrano4. Moulton Niguel WD4. Moulton Niguel WD5. South Coast WD 5. South Coast WD

• All five agencies can All five agencies can physically receive the physically receive the water into their systemswater into their systems

1

5

4

3

2

SOCOD Participants Total Water Sources(acre-feet per year)

Current % 2035 %

Wells 5,002 7% 9,736 12%

Recycled Water 9,743 13% 13,420 16%

Ocean Water 0 0% 15,000 18%

Imported Water 60,621 80% 44,876 54%

Total 75,366 100% 83,032 100%

South Orange Coastal Ocean Desalination South Orange Coastal Ocean Desalination ProjectProject

• NOT connected to a Coastal Power PlantNOT connected to a Coastal Power Plant• Utilizes slant well intake system to be protective of Utilizes slant well intake system to be protective of

the ocean environmentthe ocean environment• Utilizes an EXISTING ocean outfall for brine Utilizes an EXISTING ocean outfall for brine

discharge; makes discharge closer in salinity to that discharge; makes discharge closer in salinity to that of the natural ocean water to improve mixingof the natural ocean water to improve mixing

• Could be on-line in 2016Could be on-line in 2016

South Orange Coastal Ocean Desalination South Orange Coastal Ocean Desalination ProjectProject

• Construction of a 15 million gallon per day Ocean Construction of a 15 million gallon per day Ocean Desalination Plant using a slant well subsurface intake Desalination Plant using a slant well subsurface intake to produce about 16,000 acre-feet per year of high to produce about 16,000 acre-feet per year of high quality drinking water is FEASIBLEquality drinking water is FEASIBLE

• Project cost = $136 million (Boyle Engineering, 2007) to Project cost = $136 million (Boyle Engineering, 2007) to $152 million with an allowance for San Juan Basin $152 million with an allowance for San Juan Basin mitigationmitigation

• Cost of water = $1287 per acre foot (Boyle Engineering, Cost of water = $1287 per acre foot (Boyle Engineering, 2007) to $1356 per acre foot with mitigation.2007) to $1356 per acre foot with mitigation.

• MWDOC has an executed contract from MET to provide MWDOC has an executed contract from MET to provide $250 per AF towards the cost of the water$250 per AF towards the cost of the water

Test Slant Well SchematicTest Slant Well Schematic

Ocean SurfaceLand Surface

Fres

h Wat

er

325 feet

Test Slant Well

Infiltration

Drill Rig

Ocean BottomMain Aquifer 40 to 130 feet ±

Salt

Wat

er

23o 350 feet ±

Drilling Site at Doheny BeachDrilling Site at Doheny Beach

Dual Rotary Drill RigDual Rotary Drill Rig

Welding Screen JointsWelding Screen Joints

Objectives for Three Year Extended Pumping Objectives for Three Year Extended Pumping and Pilot Studiesand Pilot Studies

• Start-up pumping of existing well in June 2010 to conduct study workStart-up pumping of existing well in June 2010 to conduct study work• Extended pumping to pull in ocean water – 9 monthsExtended pumping to pull in ocean water – 9 months• Validate groundwater model and beach wellfield capacityValidate 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 specificationsConduct pilot plant study; develop process treatment specifications• Conduct materials corrosion testsConduct materials corrosion tests• Refine Project cost estimatesRefine Project cost estimates

Unloading Test Facility

Mobile Test Facility – Transformer and Panel

Intuitech Technician Working on RO Unit

Corrosion and Microbial Flow Test Apparatus

Intuitech – Electrical Control Unit

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Slant Well Conductivity and TDS*

Conductivity TDS** Note: TDS calculated by 0.65 x Conductivity

A

A, C :Conductivity Meter Calibrated

B,D, E: Conductivity Meter Cleaned and Calibrated

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C

DE

Slant Well Increase in Salinity (June through Oct 2010)

Questions?Questions?

Thank you!Thank you!