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'. Quarterly Ground Water Monitoring Report - First Quarter 2002 <br /> FORMER STOCKTON PLATING FACILITY <br /> ` 632 South El Dorado Street, Stockton, California <br /> 1.0. INTRODUCTION <br /> At the request of Mr Richard Leland of R and L Business Management of Stockton, Advanced <br /> GeoEnvironmental, Inc (AGE) has prepared this report for 632 South El Dorado Street, Stockton, <br /> California(the site) This report documents the quarterly monitoring results for January 2002 The <br /> site setting is illustrated on Figure 1 The locations of structures and monitoring wells on the site are <br /> depicted in Figure 2 <br />' Background information, including details of previous site assessment work, was presented in <br /> previous AGE reports including, Corrective Action Plan, dated 15 November 1995, Quarterly <br />' Report -March 1996, dated 05 April 1996 and in Quarterly Report-June 1998, dated September <br /> 1998 <br /> Results from previous ground water monitoring events are included in the tables of this report <br /> 2.0 PROCEDURES <br />' Monitoring and sampling were performed in accordance with guidelines issued by the Central Valley <br /> Regional Water Quality Control Board (CVRWQCB) and conform to ground water monitoring <br />' guidelines issued by the San Joaquin County Environmental Health Department(EHD) In addition, <br /> field work was conducted in accordance with the EHD-approved work plan Installation of Depth <br /> Discrete Wells, dated 10 December 1999 <br /> 1 <br /> 2 1 WELL MONITORING AND EVACUATION <br />' On 28 January2002 a Solinst water level meter was used to measure the depth to ground water in <br /> P <br /> eight monitoring wells (MW-1 through MW-8) and four vapor wells (VW-1 through VW-4) <br /> After ground water depth measurements, a minimum of three casing-water volumes of water were <br />' removed from wells MW-4 through MW-8 and VW-1 through VW-4 using a submersible pump or <br /> dedicated polyethylene bailers The tops of the screened intervals in wells MW-I through MW-3 are <br /> approximately 15 feet below the ground water surface therefore the wells were not purged or <br />' sampled <br /> Temperature,pH,and electrical conductivity were measured at regular purge-volume intervals using <br />' an Oakton water analyzer Purge water stabilization field data sheets are included in Appendix A <br /> Purged water was stored on-site in labeled DOT-approved 55-gallon drums <br /> r <br />