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Quarterly Report - Third Quarter 2003 <br /> FORMER STOCKTON PLATING FACILITY <br />' 632 South EI Dorado Street, Stockton, California <br /> , t <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 September 2003 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 are presented in <br /> AppendixA 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 PURGING <br /> On 26 September 2003, a Solinst water level meter was used to measure the depth to ground water <br />' in 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 vapor wells VW-1 through VW-4 using dedicated, disposable polyethylene bailers, <br /> while three casing-water volumes of water were removed from monitoring wells MW-4 through <br /> MW-8 using dedicated polyethylene foot-bailers The tops of the screened intervals in wells MW-1 <br />' through MW-3 were approximately 15 feet below the ground water surface, therefore, these wells <br /> were not purged or sampled <br />' Temperature,pH,and electrical conductivitywere measured at regular purge-volume intervals using <br /> r 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 />' Advanced GeoEnvtronmental,Inc <br />