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' Quarterly Report - Second Quarter 2000 <br /> i <br /> PACIFIC PRIDE- SOUTH EL DORADO STREET <br /> ' 3147 South El Dorado Street, Stockton, California <br /> I <br /> ' 1.0. INTRODUCTION <br /> Advanced GeoEnvironmental, Inc (AGE)has prepared this Quarterly Report for the second quarter <br /> ' of the year 2000 for 3147 South El Dorado Street, Stockton, California The site setting is illustrated <br /> on Figure 1 Site 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 is prepared <br /> in accordance with guidelines established by the California Regional Water Quality Control Board- <br /> Central Valley Region for investigation of underground storage tank (UST) sites Background <br /> information is summarized in the Preliminary Investigation and Evaluation Report -June 1999, <br /> ' dated 26 July 1999 and prepared by AGE <br /> ' 2.0. PROCEDURES <br /> • On 15 June 2000, ground water monitoring and sampling was performed at the site on wells MW-1, <br /> ' MW-2, MW-3 and MW-4 Ground water monitoring procedures for the site were outlined in <br /> Monitoring Well Installation Work Plan - September 1999, dated 01 September 1999, prepared by <br /> AGE and approved by the PHS-EHD by letter dated 23 September 1999 <br /> 2 1 MONITORING WELL PURGE PROCEDURES <br /> t <br /> Depths to ground water were measured in each well from the tops of the well casings at the site to <br /> t the nearest 0 01 foot utilizing a Solmst water level meter Ground water elevations in each well at <br /> the site were 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 12 gallons of ground water(a minimum of three <br /> ' casing-water volumes per well)were removed from wells MW-1,MW-2,MW-3 and MW-4 utilizing <br /> a polyethylene disposable bailer Temperature,pH and conductivity were measured for stabilization <br /> at regular purge-volume intervals from each well using an ICM water analyzer Field data and logs <br /> are in Appendix A Purged ground water was containerized in 55-gallon drums and was stored on- <br /> site in an area lacking general public access <br /> ' T Advanced GeoEnvironmental,Inc <br /> I <br />