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4 <br /> 1 S t 1 <br />' Quarterly Report - January 1998 <br /> GRANT LINE GAS & FOOD <br />' 2420 Grant Line Road,'Tracy, California ; <br />' 1.0. INTRODUCTION Y <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 monitonng activities were conducted on 30 January 1998 The <br /> general setting of the site is illustrated in Figure 1 -Location Map Monitonng 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 - l , prepared by <br /> AGE �'� <br /> 1 , <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 /> 1 <br /> • 2.0. PROCEDURES <br /> 2 1 MONITORING WELL PURGE PROCEDURES <br /> rOn 30 January 1998, the water level to each monitoring well was measured relative to the top of the <br /> well casing in each well using a Solinst water level meter After water levels were measured, a two- <br /> stage submersible pump was used to purge each well Eight to ten gallons (minimum of three well <br /> volumes) of water were removed from each well Temperature, pH and conductivity were measured <br /> at two-gallon intervals using an ICM water analyzer during purging, and had generally stabilized <br />' (Appendix A)by the end of the purging process Purged water was stored on-site in 55-gallon, DOT- <br /> approved drums <br /> t <br /> 22 COLLECTION OF GROUND WATER SAMPLES , <br /> Water samples were-collected from each well using a new disposable plastic bailer Each water <br /> sample was transferred into two 40-m1 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 Each sample was analyzed for <br /> • Total petroleum hydrocarbons quantified as gasoline and as diesel (TPH-g and TPH-d) by- <br /> EPA Method 8015m, <br /> Advanced C,eoEnvironmental Inc <br />