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1 <br />' 20 October 200 <br /> AGE-NC Project No 95-0111 <br />' Page 5 of 8 <br /> According to Mr Joe Toste Jr Property owner of Grant Line Gas and Food the two domestic water <br />' wells on Taste Road supply water to Grant Line Gas and Food and the businesses located on Toste <br /> Road The well located at 2450 Toste Road is located approximately 50 feet south of Grant Line Gas <br /> and Food The well is completed to a total depth of 220 feet below surface grade(bsg) and contains <br />' well screen from 195 feet to 220 feet bsg A copy of the well driller's log is included as Appendix C <br /> The well located at 2480 Toste Road is approximately 300 feet southwest of Grant Line Gas and <br />' Food According to Mr Joe Toste this well is completed to a total depth of 200 feet No other <br /> information could be obtained regarding this well or the domestic wells observed at 2040 and 2120 <br /> Grant Line Road The-domestic well located at 2450 Toste Road was sampled and analyzed for the <br />' chemicals of concern during this investigation and no detection were reported A summary of all <br /> visually observed wells located during the reconnaissance is included in Table 3 <br />' No additional wells were located within 2,000 feet of the subject property on the Department of <br /> Water Resources(DWR)database or the San Joaquin County Flood Control and Water Conservation <br /> District (SJCFC&WCD) map No other wells were identified during the physical survey Figure 4 <br />' depicts the approximate location of the domestic water wells and ground water monitoring wells <br /> located during the receptor survey <br />' 5.0. ASSESSMENT OF PETROLEUM HYDROCARBON-IMPACTED SOIL AND <br /> GROUND WATER <br />' Between January 1994 and June 2002,thirteen soil borings were advanced at the site for collection <br /> of soil samples and installation of eight ground water monitoring wells (MW-1 through MW-8) <br />' Thirty-two ground water monitoring and sampling events had been performed at the site between <br /> January 1994 and June 2003 to investigate the extent of hydrocarbon-impacted ground water in the <br />' vicinity of the former USTs <br />' 5 1 HYDROCARBON-IMPACTED SOIL <br /> The greatest concentration of petroleum hydrocarbon-impacted soil was encountered in soil boring <br />' MW-5 at a depth of 5 feet bsg (Table 1), MW-5 is Iocated north of the site along Grant Line Road <br /> (Figure 2) The highest concentration of TPH-d and TPH-g were 1,700 mg/kg and 150 mg/kg at five <br /> feet bsg The highest benzene concentrations was 0 13 mg/kg in sample B7-5, five feet bsg <br /> General hthology, soil sample locations and concentrations of TPH-g, TPH-d and benzene are <br /> depicted in cross sectional views A-A' and B-B' Cross sections are presented in Figures 5 and 6 <br />' The approximate extent of adsorbed TPH concentrations is depicted in plan view in Figure 7 When <br /> . the data collected at the site is plotted In both plan view and cross sectional view, the apparent <br /> IAdvanced GeoEnvirvnmentai Inc <br /> I <br />