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' Quarterly Report - June 1997 • GRANT LINE GAS & FOOD ' 2420 Grant Line Road, Tracy, California ' 1.0. INTRODUCTION In accordance with a request from Mr Joe Toste, Advanced GeoEnvironmental, Inc (AGE), has ' prepared this Quarterly Report for the field activities performed at 2420 Grant Line Road, Tracy, California Quarterly ground water monitoring activities were conducted on 13 June 1997 The ' general setting of the site is illustrated in Figure 1 - Location Map Monitoring well locations on the site are illustrated in Figure 2 -Site Plan A detailed background of previous work performed at the site was presented in the Quarterly Report- December 1996, dated 28 Februaiy 199 ; prepared by ' AGE The quarterly monitoring and sampling was performed in accordance with San Joaquin County ' PubIic Health Services - Environmental Health Division (PHS-EHD) and Central Valley Regional Water Quality Control Board(CVRWQCB) guidelines for investigation of underground storage tank (UST) sites 10 2.0. PROCEDURES 2 1 MONITORING WELL PURGE PROCEDURES ' On 13 June 1997, the water level in each monitoring well was measured relative to the top of the well casing using a Solinst water level meter After water levels were measured, a two-stage ' submersible pump was used to purge each %Nell Three to four gallons (minimum of three well volumes) of water were removed from each well Temperature,pH and conductivity were measured at two-gallon intervals using an ICM water analyzer during purging, and had generally stabilized ' (Appendix A)by the end of the purging process Purged water was stored on-site in 55-gallon, DOT- approved drums 1 22 COLLECTION OF GROUND WATER SAMPLES ' Water samples were collected from each well using a new disposable plastic bailer Each water sample was transferred into two 40-m1 VOA vials and one I-liter amber bottle After collection, the samples were labeled and placed in a chilled container for transportation under chain-of-custody to ' McCampbell Analytical, Inc , (MAI), in Pacheco, California ' Samples were analyzed in accordance with -EPA Methods 5030/8015m for total petroleum • hydrocarbons quantified as gasoline and as diesel (TPH-g and TPH-d), and in accordance with EPA Method 8020/602 for volatile aromatics(benzene,toluene,ethyl benzene and total xylenes BTE&X) ' and methyl-tert-butyl ether(MTBE)