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+1 �w <br /> r <br /> t i <br /> Quarterly Report - December 1999 <br /> GRANT LINE GAS & FOOD <br /> 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 Figureµl 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 - Environmental <br /> Health Division (PHS-EHD) guidelines <br /> . 2 1 MONITORING WELL PURGE PROCEDURES <br />' On 21 December 1999 the water level in monitoring wells MW-1 through MW-8 was measured <br /> relative to the tops of the well casings using a Solinst water level meter After water levels were <br />' measured, a two-stage submersible pump was used to purge each well Three to six gallons (a <br /> minimum of three well volumes) of water were removed from each well Temperature, pH and <br />' conductivity of the purged ground water were measured at two-gallon intervals using a Hydac water <br /> analyzer during purging, the measurements had generally stabilized by the end of the purging <br /> process Purged water was stored on-site in 55-gallon, Department of Transportation (DOT)- <br /> approved drums Field logs are included in Appendix A <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% hydrochloric <br /> acid (HCl) as a sample preservative and into one 1-liter amber bottle After collection, the samples <br /> were labeled and placed in a chilled container for transportation under chain-of-custody to <br /> McCampbell Analytical, Inc (MAI), a California Department of Health Services (DHS)-certified <br /> analytical laboratory located in Pacheco, California Each sample was analyzed for <br /> i <br /> Y Advanced GeoEnvironmental Inc <br />