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' Quarterly Report - Fourth Quarter 2005 RIPON FARM SERVICE . 22871 South Highway 99,Ripon, California 1.0. INTRODUCTION At the request of Mr. Allan Fetters, Advanced GeoEnvironmental, Inc. (AGE) has prepared this report of environmental activities conducted at 22871 South Highway 99, Ripon,California(site). The report documents the procedures and analytical results from' the quarterly ground water monitoring event performed on 21 November 2005; a total of ten ground water monitoring wells ' were monitored and sampled. The location of the site and surrounding area are illustrated on Figure 1. Structures, monitoring wells, and remediation well locations,associated with the site are depicted on Figures 2.Background information,including details of previous site assessment work, ' is presented in Appendix A. 2.0. PROCEDURES Field work was performed in accordance with guidelines established by the Central Valley Regional ' Water Quality Control Board(CVRWQCB)for the investigation of underground storage tank(UST) sites and the San Joaquin County Environmental Health Department (EHD) for the sampling of ' . ground water monitoring wells. 2.1. WELL MONITORING AND EVACUATION A.Solinst water level meter was used to measure the depth to ground water in monitoring wells MW-1 through MW-10 relative to the tops of the well casings;prior to any well purging.The ground water elevations and gradient were determined from these data(Table 1). After recording water level measurements, disposable plastic bailers were used to purge the wells of standing water. Approximately 2.5 to 5 gallons of water (a minimum of three casing water volumes per well)were removed from wells MW-1 and MW-3 through MW-10; well MW-2 drew down after 2 gallons had been purged. Ground water temperature, pH, and conductivity were measured at regular,intervals during purging using an Oakton water analyzer. Purged ground water was containerized in properly labeled, Department of Transportation (DOT)-approved 55-gallon ' drurris and stored on-site. Field sheets and data are included in Appendix B. ,. 2,2. COLLECTION AND ANALYSIS OF GROUND WATER SAMPLES Ground water samples were collected from the purged wells using new disposable plastic bailers 1 after allowing the wells to achieve a minimum 80% recovery of the pre-purge water volume. Each sample was transferred into three,40-milliliter(ml)EPA-approved volatile organic analysis(VOA) ' Advanced GeoEnvironmental,Inc.