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QUARTERLY REPORT <br /> September 1996 <br /> J <br />' Granit Line Gas & Food <br /> 2420 Grant Line Road <br /> Tracy, California r <br /> 1.0 INTRODUCTION <br />' In accordance with a request from om Mr Joe Toste, Advanced GeoEnvironmental, Inc (AGE) has <br /> prepared this Quarterly Report for the field activities performed at 2420 Grant Line Road in Tracy, <br /> ICalifornia Quartei ly ground water monitoring activities were conducted on 12 September 1996 The <br /> general setting of the site is illustrated in Figure 1 - Location Map Structures, the UST area, and <br /> monitoring well locations on the site are illustrated in Figure 2 - Site Plan A detailed background <br />' of previous work performed at the site was presented in the Quarterly Report -March 1996, dated <br /> 15 April 1996, prepared by AGE <br />' The quarterly monitoring and sampling was peifoirned in accordance with both the San Joaquin - <br /> County Public Health SeiVILes - Envnonmental Health Division (PHS-EHD)and the Central Valley <br />' Regional Watei Quality Contiol Boaid (CVRWQCB) guidelines for investigation of underground <br /> storage tank (US1) sites <br /> ' 20. PROCEDURES <br />' 2 1 MONITORING WELL PURGE PROCEDURES <br /> On 12 September 1996, the water le-,e] in each monitoring well was measured relative to the top of <br /> tthe casing using a Solinst water level meter The depths to ground water and relative ground water <br /> elevations are tabulated in Table I Due to technical difficulties with equipment, ground water <br />' stablization paiameters were not measured during the September sampling event Monitoring well <br /> purge volumes are depicted in Appendix A Puiged water was stored on-site in labeled, 55-gallon <br /> DOT drums <br /> After water levels weie mcasuied, a two-stage submersible pump was used to purge each well Ten <br /> gallons (minimum of three well volumes) of water were removed from each well Purged water was <br /> stored on-site in 55-gallon DOT drums <br /> t <br /> 22 COLLECTION OF GROUND WATER SAMPLES <br /> r <br /> Water samples were collected frons each well using a new disposable plastic bailer Each water <br /> sample was collected in 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 /> i l <br />