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Valley water supply reliability. The consultant will also provide support in developing the appropriate materials, coordinating efforts amongst retailers and Zone 7 communications staff, conducting workshops, and other related efforts. Regional agencies continue to participate with the consultant on the development of the strategic plan. Zone 7 will also begin the Desktop Groundwater Contaminant Mobilization study in the first quarter of 2021. This study will evaluate the potential for groundwater contaminant mobilization if purified water is introduced into the groundwater and identify potential mitigation strategies. This could involve sampling of native groundwater and prediction of the water quality of purified water, geochemical analysis of soil samples, and evaluation of existing groundwater quality and well operations data. A desktop geochemical model (e.g., using Geochemist's Workbench software) will be used. Other joint studies identified have not been initiated due to the impacts of COVID-19 and have been moved out on the schedule. DISCUSSION One of the City Council's Work Plan items for 2019/2020-2020/2021 under the Environmental Awareness goals is for the City to Continue to Participate with Regional Agencies on Studies of Water Supply Alternatives Including Potable Reuse. To meet this goal, the City has continued to partner with regional water agencies and Tri-Valley cities through the Tri-Valley Water Liaison Committee to explore water supply alternatives to meet future demands and periods of drought, like what was experienced in 2014-2015. Additionally, as part of the FY 2019/20 — 2020/21 budget process, Council approved $300,000 in CIP No. 18151 to fund this effort, specially related to potable reuse efforts. Should City Council decide not to participate in a Task Order to further study potable reuse, the other water agencies; DSRSD, City of Livermore, and Zone 7 will have to increase their funding contribution towards completion of this effort. Per City Council's request at its November 17, 2020 meeting, staff is bringing forward City Council Priority "Continue to participate with regional agencies on studies of water supply alternatives including potable reuse" and CIP No. 18151 funded at $300,000 for discussion. As part of its discussion, Council may want to consider the following options: 1. Eliminate the City's continued participation with regional agencies on studies of water supply alternatives that include potable reuse; and, in regards to CIP No. 18151 return the $300,000 to the Water Fund Balance and priority earmark the funds to be used towards PFAS Treatment. (NOTE: the City would continue to participate in regional efforts to study additional supply alternatives, but not those activities or studies related to potable reuse efforts). 2. Make no changes to the current City Council Priority and CIP No. 18151 . Following City Council's action, the City Manager will inform the Tri-Valley Water Liaison Committee agencies of Council's decision. Page 4 of 5