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Home My WebLink About05.a.1) Presentation by RMC on Recycled Water Wholesaling Studys tral t. RMC 0 CcnSani Cont— t—t rr...... tary Di stract Recycled Water Wholesale Opportunities Central Contra Costa Sanitary District Board Meeting November 5, 2015 Complex Challenges Innovative Solutions 1 • Mgd Million gallons per day • MF Microfiltration • RO Reverse osmosis • AOP Advanced oxidation • CNWS Concord Naval Weapons Station CCWD Contra Costa Water District • DERWA DSRSD -EBMUD Recycled Water Authority • EBMUD East Bay Municipal Utilities District DSRSD Dublin San Ramon Services District CVP Central Valley Project DMC Delta Mendota Canal SLDMWA San Luis Delta Mendota Water Authority SWP State Water Project �. ► i 3 50.00 45.00 40.00 35.00 30.00 25.00 O 20.00 LL 15.00 10.00 5.00 0.00 ca cJa� air P��\ �aA owe` Oec sec CP Aecc eel �eQ ,o <e —Avg Daily Effluent Zone 1 —Zone 1 Futur„ CNWS Future —In -plant —Shell Refinery 10/29/15 2 w. G use for Di ge C Reduced Delta Diversions o+—w or o� Increased Exports °a'N� sari 2I to Customem Water Supply Benefit for Delta z D Recycled Water Production -v �t d Average Dry Weather Flow — 30.4 mgd In-plant— 1.1 mgd Current Zone 1 (S) — 0.5 mgd Zone 1 Future Commitment (S) — 0.1 mgd Concord Naval Weapons Station (S) — 2.5 mgd Shell Refinery (CCWD) — 0.5 mgd Potential Available Recycled Water 25.7 mgd (S) = seasonal 5 6 10/29/15 3 Recycled Water (ReW) Tertiary treatment (assumed to include nitrification and denitrification) No brine disposal About 25.7 mgd (average dry weather flow) available for wholesale Indirect Potable (IPR) Full advanced treated water— MF /RO /AOP Environmental buffer — groundwater aquifer or surface reservoir • Brine rejection = 20% (5.1 mgd) ■ About 20.6 mgd available for wholesale Direct Potable (DPR) Full advanced treated water — MF /RO /AOP • Some additional redundant treatment • Engineered storage likely required • Brine rejection = 20% (5.1 mgd) • About 20.6 mgd available for sale /distribution 10/29/15 a] IPR to EBMUD DPR Laf Res IPR to DSRSD GW IPR to (100%) EBMUD USL OR to CC. WD Los Vaq mz IPR to EBMUD ppC 4 IPR Aqueduct wP Cr ` IPR to CCWD Q) Clayton GW o Nitrified IPR to DSRSD GW (40%) RW IPR to EBMUD San Pablo CL Tertiary CJND Raw W W to °p Raw WW DSRSD 50 Distance from CCCSD WWTP (miles) r EBMU' •CtWD • DSRSP • CVP 10/29/15 5 Favor year -round over seasonal options to meet zero dry- weather discharge goal in the long -term Favor smaller number of large potential users over multiple smaller solutions in the long- term 11 . Potable Potable • CCWD Canal EBMUD Mokelumne EBMUD Mokelumne • Local Golf Courses Aqueduct #1 or #2 Aqueduct #1, 2, or 3 • Local refineries EBMUD San Pablo Res. CCWD Mallard Reservoir • Export to Ag - DMC EBMUD Briones Res. Bollman WTP • Export to DERWA EBMUD Upper San • Export to Delta Leandro Res Diablo Lafayette Reservoir • Los Vaqueros Reservoir • CCWD Clayton groundwater recharge • Send San Ramon DSRSD groundwater Pump Station to recharge DSRSD 12 10/29/15 N limp I Utilizes existing infrastructure 20 mgd demand ^« 14 10/29/15 7 15 L:10259S�Z Evaluation Notes Customer • CCWD Treatment • Tertiary treatment with nitrification /denitrification Infrastructure • Utilizes existing infrastructure Treatment • Los Vaqueros Expansion Needed for max yield (160 -240 K AF) Volume • 20 mgd Place of Use • No change in place of use • No change in purpose of use Institutional • CCWD has other water supply options Regulatory • Potential concern over longevity of refinery operations in CA 15 L:10259S�Z Evaluation Notes Customer • DSRSD —total potable demand is 15.6 mgd • CCWD — remainder 4.4 mgd Treatment • Tertiary treatment with nitrification and denitrification Infrastructure • Utilizes existing infrastructure to refineries • May require the Transfer - Bethany pipeline (conceptual) • Los Vaqueros Expansion Needed for max yield (160 -240 K AF) Volume • 20 mgd Place of Use • No change in place of use • No change in purpose of use Institutional • CCWD would wheel raw water in exchange — may need to address place of use issues • Wheeled through SWP — requires SCVWD, Zone 7, or ACWD Regulatory • Potential concern over longevity of refinery operations in CA 16 10/29/15 I n- • Approximately 40 miles to CVP pump facility P Could potentially utilize all of CCCSD's effluent 17 18 10/29/15 Evaluation . Customer • CVP contractor — TBD, possibly SLDMWA or member agency Treatment • Tertiary treatment — will require nitrification /denitrification Infrastructure • Approximately 40 miles, large diameter pipe (42 -in diam.) • May be able to utilize 6 -mi. abandoned pipeline ROW between CCCSD and Pittsburg Volume • 25.7 mgd —full average annual flow from CCCSD Place of Use • Would need to change order for place of use to export water to Central Valley • No change in purpose of use (irrigation) Institutional • Warren Act Contract with Reclamation • Right -of -way for construction Regulatory • Will need NPDES permit, CEQA, and NEPA 18 10/29/15 CCCSD partnered with Delta - Diablo, Iron House SD, and City of Brentwood KqMfTM!2642� Evaluation Notes Customer • CVP contractor — TBD, possibly SLDMWA or Del Puerto Treatment • Tertiary treatment — will require nitrification /denitrification Infrastructure • Approximately 40 miles, large diameter pipe (42 -in diam.) • May be able to utilize 6 -mi. abandoned pipeline ROW between CCCSD and Pittsburg Volume • > 40 mgd —full average annual flow from partner agencies Place of Use • Exports Water to Central Valley Institutional • Warren Act Contract with Reclamation • Right -of -way for construction • Look at abandoned pipeline to DDSD service area Regulatory Will need NPDES permit, CEQA, and NEPA ►/ — 19 • DSRSD Regional Reliability Partners CCWD EBMUD San Francisco PUC Alameda Co. WD Santa Clara Valley WD Zone 7 Marin Municipal WD Bay Area Water Suppliers & Conservation Agencies (BAWSCA) 20 10/29/15 10 Customer Evaluation Regional Reliability Partner(s) - • CCWD • DSRSD Treatment • Brine created (5.1 mgd) Indirect Potable Reuse • 3 -mi. pipeline to Mallard Reservoir and Bollman WTP • Brine created (5.1 mgd) Infrastructure • No change in place of use 31 -mi. pipeline to Transfer Station for Los Vaqueros • CCWD has other water supply options • Los Vaqueros Expansion needed for max yield (160 -240 K AF) • Need new interties • WTP upgrades may be required, customer dependent Volume 20.6 mgd —full avg. annual flow from CCCSD, minus brine Place of Use No change in place of use Institutional CCWD or EBMUD as partner /wheeler — already part of Regional Reliability partnership Regulatory Need discharge permit for surface water reservoirs • Surface water regulations anticipated in 2016 • May require additional dilution water for the brine __ =_,.r 10/29/15 11 Evaluation Customer - • CCWD Treatment • Direct Potable Reuse — Purified Water • Brine created (5.1 mgd) Infrastructure • 3 -mi. pipeline to Mallard Reservoir and Bollman WTP Volume • 20.6 mgd —full avg. annual flow from CCCSD, minus brine Place of Use • No change in place of use Institutional • CCWD has other water supply options Regulatory • No regulations for DPR, DDW feasibility assessment in 2016 • May require additional dilution water for the brine 10/29/15 11 • Complete ReW Wholesale Opportunities Report Initiate Discussions to Continue Evaluation DSRSD - Refinery RW exchange with CCWD for raw water DPR augmentation through EBMUD San Luis Delta Mendota Water Authority & Reclamation Regional Reliability Partners IPR /DPR as a local reliable supply alternative CCWD Can serve as partner in all alternatives through exchanges 10/29/15 12 Customer Regional Reliability Partner(s) • DSRSD Treatment Direct Potable Reuse — Finished Water • Brine created (5.1 mgd) Infrastructure 3 miles to EBMUD Aqueduct intertie • Additional interties and infrastructure may be required, customer dependent Volume 20.6 mgd —full avg. annual flow from CCCSD, minus brine Place of Use No change in place of use • Change in purpose of use Institutional CCWD or EBMUD as partner /wheeler — already part of Regional Reliability partnership Regulatory No regulations for DPR, DDW feasibility assessment in 2016 • May require additional dilution water for the brine • Complete ReW Wholesale Opportunities Report Initiate Discussions to Continue Evaluation DSRSD - Refinery RW exchange with CCWD for raw water DPR augmentation through EBMUD San Luis Delta Mendota Water Authority & Reclamation Regional Reliability Partners IPR /DPR as a local reliable supply alternative CCWD Can serve as partner in all alternatives through exchanges 10/29/15 12 10/29/15 13