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14 September 2004 <br /> AGE-NC Project No 99-0559 <br />' Page 2 of 8 <br /> Ground water remediation was Initiated at the site during May 2004 in accordance with procedures <br />' outlined in the AGE-prepared Interim Remediation and Site Assessment Work Plan, dated <br /> 25 January 2001 A report on the quarterly monitoring and assessment of ground water extraction <br /> will be provided in a separate, remediation progress report <br /> 1 <br /> 2.0. PROCEDURES <br />' Ground water monitoring and sampling were performed between 08 and 09 June 2004 The work <br /> was performed In accordance with guidelines established by the California Regional Water Quality <br />' Control Board (CRWQCB) - Central Valley Division for subsurface investigation of underground <br /> storage tank (UST) sites, and with the San Joaquin County Environmental Health Department <br />' (EHD)-approved Preliminary Site Assessment Work Plan, dated 12 October 1999, and Interim <br /> Remediation and Site Assessment Work Plan, date 25 January 2001, both prepared by AGE <br />' 2 1 WELL MONITORING AND EVACUATION <br />' Depth to ground water was measured In wells MW-1 through MW-8E from the top of the well <br /> casings to the nearest 0 01-foot utilizing a Slope water level meter, ground water elevations and <br /> gradients in this report are based on the measured depths <br />' After ground water depth measurements, dedicated, disposable polyethylene bailers were utilized <br /> to purge standing water from wells MW-1 through MW-4, all the wells were purged dry after <br />' approximately 2 5 gallons of water and/or free product were removed Free product or sheen was <br /> observed in wells MW-1 through MW-3, and subsequently bailed off <br />' The well chambers of the multi-level monitoring wells MW-5 through MW-8 were purged by <br /> lowering and raising a 318-mch outer diameter, length-discrete polyethylene hose equipped with a <br /> ball-valve water tip through the top chambers Into the specific water-charged screened section <br />' Approximately 0 13 to 4 gallons of ground water (a minimum of three casing-water volumes per <br /> well),when available,were removed from the multi-level monitoring well levels A, B, C, D and E <br />' With the exception of wells MW-1 through MW-3, which contained free product, temperature,pH <br /> and conductivity were measured for stabilization at regular purge-volume intervals during <br />' monitoring using an Oakton water analyzer, field data and logs are Included in Appendix A Purged <br /> ground water was containerized in 55-gallon drums and processed on-site for discharge underpermit <br /> I <br /> Advanced GeoEnvironmental,Inc <br />