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CONCLUSIONS The information contained in this copyrighted report is for the exclusive use of Linne Estates,LLC, and the San Joaquin County Environmental Health Department. This report does not in any way address well design parameters,required domestic and fire demand,etc.for the CSA-44A well. The primary purpose of this report was to investigate and summarize the information found within the scientific literature, and the documents prepared by the Pacific Municipal Consultants, Bookman- Edmonston Engineering and Kennedy/Jenks/Chilton. • As referenced in the Mitigated Negative Declaration prepared by P.M.C., it is imperative that conjunctive water use of both surface waters and groundwaters must be secured. • Groundwater is of course, a renewable resource. However, it can be temporarily depleted when the underlying aquifers are overdrafted. Excellent management practices such as the installation of the proposed monitoring wells will provide information as to how much water is in storage, how this volume varies with time and the quality of the recharge water. Consequently, it is also imperative that the monitoring wells be installed as recommended. • It is our understanding that there will be two CSA-44A wells: the existing borehole at the south end of Apricot Lane and a proposed well on the east side of MacArthur Road, north of Palmquist Road. • Water conservation must be of the highest priority. It is our understanding that water meters will be, and must be, installed for each of the new houses proposed for both the Castello Estates and Linne Estates projects. Additionally, the use of low flow water fixtures will assist in water conservation efforts. • Groundwater quantity and quality may be seriously impacted by natural forces including,but not limited to, short-term or extended drought,earthquake or other geological/geochemical phenomenon. If water supply to the proposed Castello Estates and Linne Estates projects should become adversely affected,then it will be recommended by PHS-EHD that a Local Agency Formation Commission(LAFCO)annexation be proposed,so that all improvements on CSA-44A wells must connect to the City of Tracy domestic water supply. • It is currently known that the Fairoaks well has lost production capacity according to the Environmental Health Department. A Downhole/Slide Scan Video Tool can be used by a well surveying company to investigate the possibility of structural problems with this well. As illustrated above, the drawdown effect from CSA-44A as determined from the data presented,should theoretically have no effect on the Fairoaks well with respect to well interference. • The sustainable yield, as determined from the Kennedy/Jenks report is 22,000 acre-feet per year, for both the City of Tracy and irrigation demands. The anticipated water usage for CSA-44A is projected to be approximately 280 acre-feet per year. With an estimated 3.45 million acre-feet of water in storage under the Tracy area,sufficient quantities of lower zone water exist. Page -6- tia(.Cey Ag research