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Quarterly Report - First Quarter 2003 <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 March 2003 The site <br /> 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 are presented in <br /> Appendix A Results from previous groundwater monitoring events are included in the tables of this <br /> 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 /> 2 1 WELL MONITORING AND EVACUATION <br /> On 03 March 2003, 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-1 through VW-4) <br /> After ground water depth measurements, a minimum of three casing-water volumes of water were <br /> removed from vaporwells VW-1 through VW-4 using a dedicated,disposable polyethylene bailers, <br /> while three casing-water volumes of water were removed from monitoring wells MW-4 through <br /> MW-8 using a dedicated polyethylene foot-bailers (waterra) Former water-table monitoring wells <br /> MW-1 through MW-3 were not purged because they are currently drowned at approximately 15 feet <br /> below water table and consequently were not utilized for ground water sampling <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 B <br /> Purged water was stored on-site in labeled DOT-approved 55-gallon drums <br /> • <br /> Advanced GeoEnrnranm=L-1,Inc <br />