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r <br /> Quarterly Report - December 1996 <br /> GRANT LINE GAS & FOOD <br />' 2420 Grant Line Road, Tracy, California <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 31 December 1996 The <br /> ,' general setting of the site is illustrated in Figure 1 - Location Map Monitoring 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 Repoi t- March 1996, dated 15 April 1996, prepared by AGE 3 <br /> The quarterly monitoring and sampling was performed in accordance with San Joaquin County <br /> Public Health Services - Environmental Health Division (PHS-EHD) and Central Valley Regional <br /> Water Quality Control Board(CVRWQCB)guidelines for investigation of underground storage tank <br /> (UST) sites <br /> r J , <br /> 20. PROCEDURES <br />�} 21 MONITORING WELL PURGE PROCEDURES <br /> On 31 December 1996, the water level m each monitoring well was measured relative to the top of <br /> the casing using a Solinst water level'meter After water levels were measured, a two-stage <br /> submersible pump was used to purge°each well Six gallons (minimum of three well volumes) of <br /> water`were removed from each well Temperature,pH and conductivity were measured at one-gallon <br /> intervals using an ICM water analyzer during purging, and had generally stabilized (Appendix B) <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 newdisposable plastic bailer Each water <br /> - sample was collected in two 40-m1 VOA vials and one 1-liter amber bottle After collection, the f <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 i <br /> Samples were analyzed for total petroleum hydrocarbons quantified as gasoline and as diesel'(TPH-g <br /> and TPH-d) in accordance with EPA Methods 5030/8015m, and for volatile aromatics (benzene, <br /> I toluene, ethyl benzene and total xylenes BTE&X) with methyl-tert-butyl ether (MTBE) in <br /> accordance with EPA Method 602 At the request of the PHS-EHD, ground water samples with <br /> 11 <br /> F I 1 <br /> ti <br />