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POTABLE REUSE STUDIES & OTHER EFFORTS (as of Dec.9, 2019) 2019 2020 2021 Estimated Total QUARTER 3rd 4th 1st 2nd 3rd 4th 1st 2nd 3rd 4th Consultant Cost Funding Start End —— Regional Water Demand Study —— — Regional Demand Study $ 186,000 Zone 7 Nov-19 Sep-20 ---- — ---------------------------— - ------ -------------------------------------------------- ------------- ---- Regional Water Supply Updates Conjuctive Use Study Jan-20 Jun-20 — — —— —— $ 200,000 Zone 7 2021 Water Supply Evaluation Update Jun-20 Dec-20 2020 Urban Water Management Plan N/A Zone 7 Jul-20 May-21 --- ------------ ---------- Groundwater/Raw Water Augmentation Chain of Lakes Studies/Plans — — — -DVWTP Treatability Study'(WOTS) $ 24,500 Zone 7 Aug-19 Nov-19 -COLs Hydraulic Modeling/Water Balanceb $ 100,000 Zone 7 Jan-20 Dec-20 Desktop GW Contaminant Mobilization Study $ 100,000 Joint Apr-20 Dec-20 ---------------- ----- Groundwater Investigations(e.g.,leaching study,tracer study) $ 400,000 Joint Jan-21 Dec-21 Injection Well Siting Study $ 100,000 Joint Oct-20 Jun-21 Communications $ 200,000 Joint Mar-20 Dec-21 -------------------- Independent Advisory Panel 100,000 Joint Oct-20 Dec-21 Other Efforts(e.g.,institutional analysis,grants,etc.) 100,000 Joint Oct-20 Dec-21 — �— $ 1,000,000 Total Jointly-Funded Costs a.This is part of the Chain of Lakes Pipeline Project.Since one of the possible uses of the pipeline is to convey purified water to the DVWTP,the study also looks at the impacts of purified water on the DVWTP's ability to treat possible blended supply sources. b.This is part of the Chain of Lakes Master Plan effort,and will look at how various uses of the lakes could be accommodated. In progress/to be completed Planned *Decision points for continuing into next phase.