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WATER SYSTEM MANAGEMENT PLAN OCTOBER 2024 / CAROLLO <br />CITY OF PLEASANTON WATER SYSTEM MANAGEMENT PLAN 13 <br />5.3.3 Other Projects <br />5.3.3.1 DER Piloting Projects <br />SP-3 DER Piloting Projects: Distributed Energy Resources projects (DER) include a range of options <br />related to energy management at above ground facilities. The Energy Master Plan (Appendix G) identified <br />four potential sites for piloting of DER projects. The City is planning to move forward with DER system <br />piloting at the Tassajara Tank site and Turnout No. 3. For the Tassajara site the piloting options include <br />roof mounted solar panels, ground mounted solar arrays, and a solar canopy. For Turnout No. 3 the <br />options include the potential for roof mounted panels, and a solar canopy. <br />5.4 Priority C Project Descriptions <br />5.4.1 Water Supply Projects <br />WS-3 Long Term Groundwater Supply Treatment: This project is a placeholder for additional costs <br />related to groundwater treatment to address increasingly stringent water quality regulations in the future <br />and/or to support sustainability of the groundwater basin. <br />WS-4 Permanent Residual Control System (RCS) Installation: This project includes moving the existing <br />RCS equipment inside a building (not container type structure) and evaluating switching to bulk chemical <br />from self-generation process at both the Foothill and Sycamore reservoirs. The RCS system has shown to <br />improve the chlorine residual in the system and has allowed the City to minimize the draining and manual <br />cycling of the water storage tanks. The City would like to make the RCS system improvements at both the <br />Foothill and Sycamore reservoirs. Carollo conducted an evaluation of the performance of the RCS system. <br />The evaluation is documented in Appendix I. <br />5.4.2 Distribution Projects <br />DS-10 Priority C Fire Flow Improvements. The WDSCMP categorized fire flow capacity deficiencies less <br />than 15% as Priority C improvements. The fire flow improvements are documented in the WDSCMP. <br />DS-11 Upper Zone Tank Mixers. Distribution system water quality analysis has identified the potential <br />need for tank mixers in the upper zones to mitigate the reduction in chlorine residual. Preliminary <br />estimates included five mixers in the upper zone reservoirs. The evaluation of distribution system <br />nitrification are included in the Nitrification Evaluation Project Memorandum (Appendix I). <br />5.4.3 Rehabilitation and Replacement Projects <br />RR-14 Other Facility Rehabilitation: Priority A and B projects for facility rehabilitation was developed <br />based on the grouping of asset replacement and rehabilitation recommendations into capital projects <br />based on facilities. There are many other assets identified in the Condition Assessment report that were <br />not grouped into capital projects. Those asset replacement costs are captured in this project description <br />as a placeholder for the additional funds needed in the long term. <br />RR-16 Pipeline Rehabilitation: Cost for the rehabilitation or replacement of the underground pipelines <br />(approximately 3 miles/year) to extend the overall useful life of the City's water system piping. <br />Identification of the specifics of these projects will be completed later. <br />Page 444 of 658