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Quarterly Report - Second Quarter 2006 <br /> . RIPON FARM SERVICE <br /> ' <br /> 32A South Highway 99,Ripon, California <br /> 2 <br /> 1.0. INTRODUCTION v 71 all <br /> At the request of Mr Allan Fetters, Advanced Ge pyironinental, Inc (AGE) has prepared this <br /> report of environmental activities conducted at 22 South Highway 99, Ripon, California(site) <br /> The report documents the procedures and analytical results from the quarterly ground water <br /> monitoring event performed on 15 May 2006, a total of ten ground water monitoring wells were <br /> ' monitored and sampled The location of the site and surrounding area are illustrated on Figure 1 r <br /> Structures,monitoring wells,and remediation well locations associated with the site are depicted on <br /> Figures 2 Background information,including details of previous site assessment work,is presented <br /> in Appendix A <br /> ' 2.0. PROCEDURES <br /> ' Field work was performed in accordance with guidelines established by the Central Valley Regional <br /> Water Quality Control Board(CVRWQCB)for the investigation of underground storage tank(UST) <br /> sites and the San Joaquin County Environmental Health Department (EHD) for the sampling of <br /> 10 <br /> ground water monitoring wells <br /> 1 2 1 WELL MONITORING AND EVACUATION <br /> A Solmst water level meter was used to measure the depth to ground water in monitoring wells <br /> ' MW-1 through MW-10 relative to the tops of the well casings,prior to any well purging The ground <br /> water elevations and gradient were determined from these data(Table 1) <br /> After recording water level measurements, disposable plastic bailers were used to purge the wells <br /> of standing water Approximately 3 5 to 6 gallons of water (a minimum of three casing water <br /> ' volumes per well)were removed from wells MW-1 through MW-10 Ground water temperature,pH, <br /> and conductivity were measured at regular intervals during purging using an Oakton water analyzer <br /> Purged ground water was containerized in properly labeled, Department of Transportation <br /> ' (DOT)-approved 55-gallon drums and stored on-site Field sheets and data are included in r <br /> Appendix B <br /> ' 2 2 COLLECTION AND ANALYSIS OF GROUND WATER SAMPLES <br /> ' Ground water samples were collected from the purged wells using new disposable plastic bailers <br /> after allowing the wells to achieve a minimum 80%recovery of the pre-purge water volume Each <br /> sample was transferred into three,40-milliliter(ml)EPA-approved volatile organic analysis(VOA) <br /> Advanced GcoEnvlronmental,Inc <br />