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t <br /> • Quarterly Report - March 1997 <br /> GRANT LINE GAS & FOOD <br /> 2420 Grant Line Road, Tracy, California <br /> r <br /> r <br /> 10. INTRODUCTION <br /> In accordance with a request from Mr Joe Toste, Advanced GeoEnvironmental, Inc (AGE), has <br /> prepared this Quarterly Report for the field activities performed at 2420 Grant Line Road, Tracy, <br /> California Quarterly ground water monitoring activities were conducted on 25 March 1997 The <br /> general setting of the site is illustrated in Figure 1 -Locatton Map Momtoring well locations on the <br /> site are illustrated in Figure 2 -Site Plan A detailed background of previous work performed at the <br /> site was presented in the Quarterly Report- December 1996, dated 28 February 1991t, prepared by <br /> AGE <br /> The quarterly monitoring and sampling was performed in accordance with San Joaquin County <br />' Public Health Services - Environmental Health Division (FHS-EHD) and Central Valley Regional <br /> Water Quality Control Board(CVRWQCB)guidelines for investigation of underground storage tank <br /> (UST) sites <br /> I <br /> 140 2.0. PROCEDURES <br /> 21 - MONITORING WELL PURGE PROCEDURES <br />' On 25 March 1997,the water level in each monitoring well was measured relative to the tope of each <br /> well's casing using a Solinst water level meter After water levels were measured, a two-stage <br /> I submersible pump was used to purge each well Eight gallons (minimum of three well volumes) of <br /> water were removed from each well Temperature,pH and conductivity were measured at two-gallon <br /> intervals using an ICM water analyzer during purging, and had generally stabilized (Appendix A) <br />' by the end of the purging process Purged water was stored on-site in 55-gallon, DOT-approved <br /> drums <br />' 22 COLLECTION OF GROUND WATER SAMPLES <br />' Water samples were collected from-each well using a new disposable plastic bailer Each water <br /> sainple was transferred into two 40-ml VOA vials and one 1-liter amber bottle After collection, the <br /> samples were labeled and placed in a chilled container'for transportation under chain-of-custody to <br />' McCampbell Analytical, Inc ,, (MAI), in Pacheco, California <br />' Samples were analyzed in accordance with EPA Methods 5030/8015m for total petroleum <br /> hydrocarbons quantified as gasoline and as diesel (TPH-g and TPH-d), and in accordance with EPA <br /> Method 8020/602 for volatile aromatics(benzene,toluene,ethyl benzene and total xylenes BTE&X) <br />' and methyl-tert-butyl ether(MTBE) <br /> t <br />