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Cecchins, Cecchuu, and&ovannons, Fueling Island <br /> 4e® ResuIls <br /> 4A Ground nd Wateir Mevafion Data <br /> Ground water elevations measured in monitoring wells UST-1 through UST-5 on October <br /> 4, 1996 are presented in Table 1 The average depth to ground water (as measured from <br /> the top of casing for each monitoring well) was approximately 68 feet below ground <br /> surface (bgs) The ground water level recorded this quarter has fallen approximately 6 <br /> feet since last quarter No free product was observed in any of the wells <br /> Figure 3 - Ground Water Elevations shows ground water flow beneath the site on October <br /> 4, 1996, to be toward the no at a radient of 7 foot per foot (35 <br /> feet per mile) The gradient appears flatter in the western portion of the site The <br /> ifindings are consistent with the data of previous monitoring events This flow direction <br /> is similar to the regional flow direction interpreted from San Joaquin County Spring 1995 <br /> Ground Water Report Maps (San Joaquin County Flood Control and Water Conservation <br /> District, 1995). <br /> 4.2 Ground Walteir AnaR cO Resu hs <br /> o � <br /> The ground water samples collected from monitoring wells UST-2 through UST-5 were <br /> analyzed at the laboratory for <br /> 0 Total Petroleum Hydrocarbons as diesel (TPH-D) using EPA Method <br /> 3550/8015 Modified, and <br /> 0 Total Petroleum Hydrocarbons as gasoline (TPH-G) using EPA Method <br /> 503018015, and <br /> o Benzene, Toluene, Ethylbenzene, and Xylenes (BTEX) using EPA Method <br /> 5030/8020 The trip blank was only analyzed for BTEX; and <br /> 0 Methyl Tert-Butyl Ether (MTBE) by EPA Method 5030/8020 <br /> ef 169254W\gtrly rpt13qu96 rpt 6 Favnronwnral Science&Enguseenng, Inc <br />