Laserfiche WebLink
i <br /> Quarterly Report - First Quarter 2003 <br /> PACIFIC PRIDE - SOUTH EL DORADO STREET <br /> 3147 South El Dorado Street, Stockton, California <br /> 10 INTRODUCTION <br /> Advanced GeoEnvironmental, Inc (AGE) has prepared this quarterly report for 3147 South El <br /> Dorado Street(the site),Stockton,California The scope ofwork included performance of a quarterly <br /> ground water monitoring event and preparation of this report The objectives were to monitor <br /> j concentrations of petroleum hydrocarbons in ground water and to characterize ground water flow <br /> ' direction and gradient at the site The site setting is illustrated in Figure 1 Site structures and <br /> monitoring well locations are depicted in Figure 2 <br /> ' This report is prepared in accordance with guidelines issued by the California Regional Water <br /> Quality Control Board-Central Valley Region(RWQCB)for investigation of underground storage <br /> ' tank (UST) sites Background information is summarized in the AGE-prepared Preliminary <br /> Investigation and Evaluation Report-June 1999, dated 26 July 1999 <br /> 2.0. PROCEDURES <br /> lie ,yh On.2f March 2003, ground water monitoring and sampling were performed at the site on wells <br /> MW-1 through MW-7 As-built monitoring well construction details are summarized in Table 1 <br /> Ground water monitoring procedures for the site were outlined in the AGE-prepared Monitoring <br /> i ' Well Installation Work Plan - September 1999, dated 01 September 1999, and approved by San <br /> Joaquin County Environmental Health Department (SJCEHD) letter dated 23 September 1999 <br /> 2 1 WELL MONITORING AND PURGING <br /> ' Depth to ground water was measured in each well from the top of the well casing to the nearest <br /> 0 01-foot utilizing a Solmst water level meter The ground water elevation In each well was <br /> t calculated by subtracting the measured depth to ground water from the surveyed casing elevation <br /> (Table 2) Ground water elevations were plotted and contoured on a scaled site map (Figure 3) <br /> ' After water levels were measured,approximately 4 to 9 gallons of groundwater(a minimum of three <br /> casing-water volumes per well)were purged from wells MW-1 through MW-4, MW-6 and MW-7 <br /> utilizing polyethylene disposable bailers, approximately 28 gallons of ground water were purged <br /> ' from well MW-5 utilizing a Watera Hydro-Lift pump Temperature, pH and conductivity were <br /> measured for stabilization at regular purge-volume intervals from each well using an Oakton water <br /> analyzer Field data and logs are included with Appendix A Purged ground water was containerized <br /> ' in 55-gallon drums and was stored on-site in an area lacking general public access <br /> f <br /> ' Advanced GeoEnvtronmental,Inc <br />