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1 <br />' Quarterly Report - Second Quarter 2004 <br /> • Former MEL BOKIDES PETROLEUM- Linden <br />' 8203 East Highway 26, Stockton, California <br />' 1.0. INTRODUCTION <br /> At the request ofMr Nick Bokides ofMel Bokides Petroleum(MBP),Advanced GeoEnvironmental, <br />' Inc (AGE) has prepared this quarterly report for the property located at 8203 East Highway 26, <br /> Stockton, California (site) The scope of work included quarterly ground water monitoring, a well <br />' casing survey and preparation of this report The report was prepared in accordance with guidelines <br /> issued by the Central Valley Regional Water Quality Control Board (CVRWQCB) for subsurface <br /> investigations of former underground storage tank(UST)systems The site location and site plan are <br />' illustrated on Figures 1 and 2, respectively, the site background information is summarized in <br /> Appendix A <br />' 2.0 PROCEDURES <br />' All field work procedures and reporting requirements are in accordance with guidelines issued by <br /> the Central Valley Region of the Regional Water Quality Control Board (CVRWQCB) for <br /> subsurface investigation ofunderground storage tank(UST)system sites and the San Joaquin County <br />' • Environmental Health Department (EHD) for sampling of ground water monitoring wells <br /> i <br />' 2 1 MONITORING WELL EVACUATION AND MONITORING <br /> On 30 June 2004,the water level in each of three monitoring wells was measured relative to the top <br /> tof the well casing using a Solinst water level meter After water levels were measured, a dedicated, <br /> disposable plastic bailer was used to purge each well Three gallons (a minimum of three well <br /> volumes) of water were removed from the wells Temperature, pH and conductivity of the purged <br /> water were measured at one-gallon intervals using an Oakton water analyzer during purging The <br /> values had generally stabilized by the end of the purging process (Appendix B) Purged water was <br /> stored on-site in 55-gallon, DOT-approved drums <br /> 2 2 COLLECTION AND ANALYSIS OF GROUND WATER SAMPLES <br /> Prior to collection of ground water samples, the depth to ground water was re-measured in each <br /> I purged well to ensure that a minimum of 80% of the well volume had recharged Then a water <br /> sample was collected from each well using a new disposable plastic bailer Each water sample was <br /> transferred into three chilled 40-ml volatile organic analysis (VOA) vials containing 0 5-ml <br /> hydrochloric acid(18%) as a sample preservative and one I-liter amber bottle After collection,the <br /> • samples were labeled and placed in a chilled container for transportation under chain of custody to <br /> Cal Tech Environmental Laboratories, a Califomia Department of Health Services(DHS)-certified <br /> Advanced GeoEnvlronmental,Inc <br />