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' Additional Site Assessment Report and Request for Closure 4 <br /> 7-Eleven Inc, Store#17647, 1048 W Yosemite Avenue,Manteca,CA August 13, 1999 <br /> so CONCLUSION AND REQUEST FOR CLOSURE <br /> ' The only site area containing detectable concentrations of MTBE and/or elevated TPH-G levels <br /> (benzene was not detected in either soil or groundwater at the sate)was the area of boring GP-3, <br /> directly adjacent to the UST pit As dissolved MTBE concentrations in this vicinity were relatively low <br /> ' and delineated to the northeast, southwest, and southeast by non-detectable concentrations in other <br /> borings, further assessment is not indicated <br /> It is proposed that the extent of hydrocarbons defined by this investigation is very limited, and therefore <br /> poses no to low risk to local groundwater resources Based on these data, no further action/site closure <br /> ' is requested of the SJCEHD Intrinsic biodegradation is expected to continue to reduce dissolved <br /> hydrocarbon levels at the site over time <br /> 1 <br /> 1 <br /> 1 <br /> I <br /> I I <br /> ✓ � i ! II <br /> r i I fli <br /> 1 I �{ I I ill I 4 i I I I II III <br /> 1 <br />