Revised. MOU with City of Santa Ana for Construction and Operation of Four Injection Wells at Centennial Park Water Issues Committee July 9, 2014

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1 Revised MOU with City of Santa Ana for Construction and Operation of Four Injection Wells at Centennial Park Water Issues Committee July 9, 2014

2 GWRS Final Expansion Future Planning Initial Expansion Final Expansion Water Created 100 mgd 130 mgd Barrier Injection mgd mgd MBI Demonstration 3 mgd* 3 mgd* Remaining Water mgd mgd Pipeline Maximum ~85 mgd ~85 mgd Remaining Water N/A 22-7 mgd *Predicted flow rate

3 Four wells ~10 mgd ~10,000 afy of injection capacity Well Locations

4 Finding Injection Well Sites Difficult Can t be too close to existing Production wells Want to cross SAR Paying County $18,000/year for one site ($540,000 over 30 years) Have a willing property owner allowing four wells

5 Centennial Park Transferred to City by Federal Government State Grant to build park improvements MBI Project requires approval by both Federal & State

6 Great Location Injection wells in this site will: Raise local water table Reduce nearby well pumping energy Reduce groundwater flow gradients Potential to reduce deep colored water upwelling into main aquifer Minor benefit regarding seawater intrusion Centennial Park June 2013 Principal Aquifer Contours

7 Memorandum of Understanding (MOU) Site Use Restrictions Maximum 6 month impact to single location General Project Concepts Wells in parking and below grade in vaults Easement Characteristics Easements for wells and pipelines Site Improvements Asphalt Paving Come back to Board with final easement documents

8 Paving Improvements District to remove and overlay 2 of asphalt paving in exchange for 30 year easements Project affects 1.88 acres Paving 9.64 acres Total cost $575,000 Extra cost $460,000 Easements 1.6 acres

9 Fee Consideration $460,000 for four well sites (plus piping) easements for 30 years One time capital project charge vs annual O&M charge Paying $540,000 to county over 30 years for one well site (MBI demonstration well) Zoning park Alternative sites with commercial & residential zoning will cost more than $460,000

10 Recommendation Agendize for July 16 Board Meeting: Approve and authorize execution of MOU with the City of Santa Ana for water injection wells at Centennial Park, subject to nonsubstantive changes approved by the General Manager and District Attorney.

11 End of Presentation

12 Related Issues Approve of GWRS Final Expansion Monitor injection of GWRS water with current demonstration well verify no issues with regulators Process EIR State funding low interest loan County approval to cross Edinger bridge

13 Destinations for GWRS Water Canyon Power Plant Miller Kraemer Miraloma 60 La Palma Up to 85 mgd Injection Wells mgd Future MBI 7-15 mgd (3-5 wells) Artic Demonstration MBI 3 mgd* Centennial Park 78 GWRS 130 mgd MBI 12 mgd*

14 Santa Ana MOU City of Santa Ana staff is supportive City Council approved June 17, 2014 Fed & State preliminary approval

15 Tentative Project Schedule TASK DATE Execute MOU with City of Santa Ana July 2014 Begin Operation of Demonstration MBI Well January 2015 CEQA Documentation for Centennial Wells Jan Jun 2015 Permitting Jul 2015 Feb 2016 MBI Centennial Park Well & Pipeline Design Aug 2015 Feb 2016 Well Construction Mar 2016 Mar 2017 Pipeline Construction & Well Equipping Mar 2016 Oct 2017 Begin Operation of Centennial Park MBI Wells October 2017

16 Tentative Project Budget TASK Design and Permitting $ 1 Estimated Cost (Millions) 4 Injection Wells: Drilling & Construction $ Injection Wells: Equipping & Site Work $ 8 9 Pipeline Connections and Laterals $ 1 2 Monitoring Well: Drilling & Construction $ 1 Oversight/Inspection $ 1 Contingency $ 3 Total $ 21 to 25

17 Drilling Development & Staging

18 Well Drilling Drilling Phase of Demonstration MBI well

19 Barrier Injection Well (I-15) placed below grade in vault Below Grade Well

20 Edinger Bridge Piers Place 36 pipe here. Requires OC Encroachment Permit Feasibility Study completed In discussions with OC staff