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{ <br /> Quarterly Ground Water Monitoring Report - Third Quarter 2000 <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) prepared this report for 632 South El Dorado Street, Stockton, <br /> ( ) has <br /> California(the site) This report documents the quarterly monitoring results for October 2000 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 />' 2.0. PROCEDURES <br /> iMonitoring and sampling were performed in accordance with guidelines established by the Central <br /> Valley Regional Water Quality Control Board (CVRWQCB) and by the San Joaquin County Public <br /> Health Services-Environmental Health Division(PHS-EHD) In addition,field work was conducted <br />' in accordance with the PHS-EHD-approved work plan Installation of Depth Discrete Wells, dated <br /> 10 December 1999 <br /> 21 MONITORING WELL PURGING PROCEDURES <br />' On 04 October 2000, a Solinst water level meter was used to measure the depth to ground water in <br /> eight monitoring wells (MW-1 through MW-8) and four vapor wells (VW-I through VW-4) The <br /> top of the screened intervals in wells MW-1 through MW-3 are approximately 15 feet below the <br />' ground water surface, however the well were purged and sampled in concurrence with the directive <br /> of the PHS-EHD <br /> After ground water depth measurements, a minimum of three well volumes of water were removed <br /> from wells MW-1 through MW-8 and VW-1 through VW-4 using a submersible pump <br />' Temperature, pH, and electrical conductivity were measured at regular-gallon intervals using a <br /> Hydac water analyzer Purge water stabilization field data sheets are included to Appendix A Purged <br /> water was stored on-site in labeled DOT-approved 55-gallon drums <br />