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TRI-VALLEY WATER AGENCIES I ES I Joint Tri-Valley Potable Reuse Technical Feasibility Study <br /> PRELIMINARY <br /> Step Description Timing <br /> Consultant Cost' <br /> allow comparison of potable <br /> reuse to other water supply <br /> options based on yield,cost, <br /> reliability,and other metrics. <br /> Subtotal $300,000-$450,000 <br /> Narrow Projects by End Use <br /> Groundwater Injection <br /> Identify most promising <br /> candidate injection well <br /> locations in coordination with <br /> Siting Study 6-8 months $100,000 <br /> Conjunctive Use Study, <br /> Contaminant Mobilization <br /> Study,and Leaching Study <br /> Desktop <br /> Contaminant Geochemical analysis of soil 4 months $50,000 $70,000 <br /> Mobilization samples/computer modeling <br /> Study <br /> Two core samples, Four <br /> Leaching Study columns(two for each site),1- <br /> 6-8 months $250,000-$310,000 <br /> month study and weekly <br /> sampling <br /> Groundwater Augmentation and Raw Water Augmentation(COU DVWTP1 <br /> Independent advisory panel <br /> comprised of water supply, <br /> Inde pendent quality and treatment experts to <br /> p provide scientific and 12 months or $50000 <br /> Advisory Panel longer ' <br /> engineering review and <br /> validation of raw water <br /> augmentation. <br /> Characterization of Lake <br /> COLs Water H/I/Cope water quality <br /> Quality Analysis throughout the year,and 8 months $50,000 <br /> projected potential water <br /> quality impacts of various <br />