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10 June 1998 AGE-NC Protect No 95-0101 Page 5 of 8 blower after approximately 15 minutes of operation A second air sample was collected at the end of the test Air samples were analyzed for TPH-g and BTE&X Organic vapor was not detected with the PID from the blower output during extraction Hydrocarbon odor was not noticed during extraction Xylenes were detected in the 15-minute sample at a concentration of 0 088 ppm TPH-g and xylenes were detected in the 90-minute sample at concentrations of 10 ppm and 0 26 ppm, respectively The analytical results are summarized on Table 5 29 GROUND WATER DISPOSAL On 19 June 1995, samples were collected from seven drums of purge water located on-site and were composited for analysis of TPH-g and BTE&X Permission was subsequently obtained from the City of Lockeford to dispose of the purge water in the city sanitary sewer system On 30 June 1995, the purge water was disposed in the car wash on-site, which is connected to the city sewer system In May 1997,permission was obtained from the City of Lockeford to dispose of the remaining purge water into the city sanitary sewer Final purge water disposal was performed on 28 May 1997 3.0. WELL SURVEY The City of Lockeford Community Service District was contacted regarding municipal wells within the City of Lockeford Two municipal wells are located within the 2,000-foot search radius for the subject property Well #4 is located approximately 1,200 feet northeast of the site on the north side of Highway 88 This well is 445 feet deep and draws water from a minimum depth of 244 feet bsg Well #2 (Tower Well) is located approximately 1,900 feet southwest of the site near the southwest corner of Elliot Road and Church Street Well #2 was installed to a depth of 310 feet and draws water from a minimum depth of 126 feet bsg Well locations are illustrated on Figure 4 The Lockeford Quadrangle topographic map from the US Geological Survey 7 5 minute series illustrates the location of many agricultural and domestic wells No such wells are illustrated near the subject property The Mokelumne River is located approximately 4,000 feet north of the subject property Bear Creek is located approximately 5,000 feet southeast of the site A small pond is located in a depression approximately 2,300 feet west of the site The California Department of Water Resources database and the San Joaquin County Flood Control and Water Conservation District-Well location Base Map did not list/illustrate any additional wells within a 2,000-foot search radius of the subject property Advanced GeoEmtronmtntal,Inc