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r rl rt -' September <br /> . Qua to y Repo1999 <br /> GRANT LINE GAS & FOOD <br />' w 2420 Grant Line Road, Tracy, California <br /> 1.0. INTRODUCTION <br /> At the request of Mr Joe Toste Jr , Advanced GeoEnvironmental, Inc (AGE), has prepared this <br />' Quarterly Report for field activities performed at 2420 Grant Line Road, Tracy, California The site <br /> setting is illustrated in Figure 1 Monitoring well locations on the site are illustrated in Figure 2 A <br />' detailed background of previous work performed at the site was presented in Quarterly Report - <br /> December 1996, dated 28 February 1996, prepared by AGE <br />' 2.0. PROCEDURES <br /> The ground water monitoring activities were conducted in accordance with Central Valley Regional <br />' Water Quality Control Board and San Joaquin County Public Health Services - Envirom-rental <br /> Health Division (PHS-EHD) guidelines <br /> I <br /> 2 1 MONITORING WELL PURGE PROCEDURES <br /> • On 20 September 1999 the water level in monitoring wells MW-1 through MW-3 and MW-5 <br /> through MW-8 was measured relative to the tops of the well casings using a Solinst water level <br />' meter After water levels were measured, a two-stage submersible pump was used to purge each <br /> well Four to five gallons(a minimum of three well volumes)of water were removed from each well <br /> Temperature,pH and conductivity of the purged ground water were measured at two-gallon intervals <br />' using an ICM water analyzer during purging, the measurements had generally stabilized by the end <br /> of the purging process Purged water was stored on-site in 55-gallon, Department of Transportation <br /> (DOT)-approved drums Field logs are included in Appendix A <br /> r , <br /> 22 COLLECTION OF GROUND WATER SAMPLES <br /> Prior to collection of ground water samples, the depth to ground water was measured in each purged <br />' well to ensure that a minimum of 80% of the well volume had recharged Water samples were <br /> collected from each well using a new disposable plastic bailer Each water sample was transferred <br /> into three chilled 40-m1 volatile organic analysis (VOA) vials containing 0 5 ml 18% HCL as a <br /> sample preservative and into one 1- amber liter bottle After collection, the samples were labeled <br /> and placed in a chilled container for transportation under chain-of-custody to McCampbell <br /> Analytical, Inc (MAI), a California Department-of Health Services (DHS)-certified analytical <br /> laboratory located in Pacheco, California Each sample was analyzed for <br /> IAdvanced GenEnvironmental Inc <br /> I ' <br />