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Quarterly Report - First Quarter 20034 <br /> JIMCO TRUCK PLAZA <br />' 22502 South Highway 99, Ripon, California <br /> 1.0. INTRODUCTION <br /> 1 <br /> At the request of Mr Dan Koch of Olympian Oil Company, Advanced GeoEnvironmental, Inc <br />' (AGE)has prepared this quarterly report for the Jimco Truck Plaza,located at 22502 South Highway <br /> 99,Ripon, California(the site) The scope of work included quarterly ground water monitoring and <br /> preparation of this report The location of the site and the immediately surrounding area are <br />' illustrated on Figure 1 The site structures, boring and monitoring well locations are illustrated on <br /> Figure 2 <br />' This report has been prepared in accordance with guidelines established by the Central Valley <br /> Regional Water Quality Control Board (CVRWQCB) for the subsurface investigation of <br />' underground storage tank (UST) sites Background information, including details of previous site <br /> assessment work, was presented in AGE's report titled Preliminary Investigation and Evaluation <br /> Report (PIER), dated 13 December 1999 <br /> 1 <br /> 2.0 PROCEDURES <br />' • Field work was conducted in accordance with guidelines established by the CVRWQCB for the <br /> investigation of UST sites and the San Joaquin County Environmental Health Department (EHD) <br />' for sampling of ground water monitoring wells <br />' 2 1 WELL MONITORING AND PURGING <br /> On 11 February 2004,a Solinst water level meter was used to measure the depth to ground water <br />' from the well casing tops in wells MW-1 through MW-9 The depths to ground water are <br /> summarized in Table 1 <br />' After water levels were gauged, disposable plastic bailers were used to purge the monitoring wells <br /> of a minimum of three casing-water volumes(approximately 15 to 3 gallons)of ground water Free- <br /> phase product was measured in well MW-6 at less than 0 01 inches thick For wells the temperature, <br />' pH,and conductivity were measured at approximately one or three-gallon intervals using an Oakton <br /> Water Analyzer The field data sheets are included in Appendix A Purged water was stored on site <br /> in 55-gallon drums <br />' Advanced GeoEnvi ron mental,Inc <br />