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QUARTERLY REPORT <br /> June1996 <br /> Stockton Plating <br /> 632 South El Dorado Street <br />' Stockton, California <br /> r <br />' 1.0. INTRODUCTION <br /> In accordance with the request of Stockton Plating,Advanced Geo Environmental, Inc (AGE)has <br />' prepared this Quarterly Report of ground water monitoring activities at 632 South El Dorado Street <br /> in Stockton, California (the site) This report details the sampling of three monitoring wells on 03 <br /> June 1996 at the site The location of the site is illustrated in Figure 1 - Location Map A plan of the <br />' site is depicted in Figure 2 - Site Plan <br /> Monitoring and sampling procedures were performed in accordance with guidelines established by <br />' the San Joaquin County Public Health Services - Environmental Health Division(PHS-EHD) and <br /> the Central Valley Regional Water Quality Control Board (CVRWQCB) for investigation of <br />' underground storage tank (UST) sites <br /> Background information, including details of previous site assessment work, was presented in the <br /> Quarterly Report - March 1996 and Corrective Action Plan - December 1995, both prepared by <br /> AGE <br /> 2.0. PROCEDURES <br /> 21 WATER PURGING PROCEDURES <br /> The scope of work included the monitoring and sampling of one ground water monitoring well and <br />' two soil vapor extraction wells(VW) At the request of the PHS-EHD, wells VW-1 and VW-2 were <br /> sampled in lieu of wells MW-1 and MW-3 <br />' On 03 June 1996, a Solinst water level meter was used to measure the depth to ground water in wells <br /> MW-I through MW-4, VW-1 and VW-2 The relative ground water elevation in each well and <br /> hydraulic gradient were determined from these data points (Table 1) <br /> After depth to water measurements, approximately 10 gallons of water (a minimum of three well <br />' volumes) were removed from MW-4, VW-I and VW-2 using a two-stage submersible pump <br /> Temperature,pH, and conductivity were measured at regular intervals using an ICM water analyzer <br /> Monitoring well stabilization data and field data sheets are included in Appendix A Purged water <br />' was stored on-site in 55-gallon drums <br /> 1 <br />