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i <br /> Quarterly Report - Second Quarter 2001 <br /> PACIFIC PRIDE - SOUTH ELDORADO STREET <br /> 3147 South El Dorado Street, Stockton, California <br /> ' 1.0. INTRODUCTION <br /> ' Advanced GeoEnvironmental, Inc (AGE) has prepared this quarterly report for 3147 South El <br /> Dorado Street (the site), Stockton, California The site setting is illustrated on Figure 1 Site <br /> ' structures and monitoring well locations are depicted on Figure 2 <br /> The objective of the work was to monitor dissolved petroleum hydrocarbon concentrations in ground <br /> ' water and to characterize ground water flow direction and gradient on the site This report has been <br /> prepared in accordance with guidelines established by the California Regional Water Quality Control <br /> Board - Central Valley Region for investigation of underground storage tank (UST) sites <br /> ' Background information is summarized in the Preliminary Investigation and Evaluation Report- <br /> June 1999, dated 26 July 1999, prepared by AGE <br /> ' 2.0. PROCEDURES <br /> U S <br /> On 27 June 2001, ground water monitoring and sampling was performed at the site on wells MW-1, <br /> MW-2,MW-3 MW-4,MW-5,MW-6 and MW-7(MW-1 through MW-7) Ground water monitoring <br /> ' procedures for the site were outlined in Monitoring Well Installation Work Plan -September 1999, <br /> dated 01 September 1999, prepared by AGE and approved by the PHS-EHD by letter dated 23 <br /> September 1999 <br /> ' A coordinated effort was made between the Pacific Pride- South El Dorado and the California Tank <br /> Line Inc (3105 South El Dorado Street) sites to conduct ground water monitoring activities <br /> ' concurrently, the California Tank-Line Inc tabulated ground water elevation results are included in <br /> Appendix A <br /> ' 2 1 MONITORING WELL PURGE PROCEDURES <br /> Depth to ground water was measured in each well at the site from the tops of the well casings to the <br /> nearest 0 01-foot utilizing a Solmst water level meter Ground water elevation in each well at the site <br /> was calculated by subtracting the measured depth to ground water from the surveyed casing <br /> ' elevations (Table 1) Ground water elevations were plotted and contoured on a scaled site map <br /> (Figure 3) <br /> ' After water levels were measured, approximately 6 to 30 gallons of ground water (a minimum of <br /> three casing-water volumes per well) were removed from wells MW-1 through MW-7 utilizing a <br /> Advanced GeoEnvironmental,Inc <br /> I <br />