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1 <br />' 27 June 2003 <br /> • AGE-NC Project No. 97-0327 <br /> tPage 4 of 5 <br />' • The ground water elevation at the site was within the screened intervals of wells MW-1, <br /> MW-2, MW-3 and MW-4, which should yield samples fully representative of shallow <br /> ground water conditions. <br />' • A low concentration of dissolved TPH-g was detected in the sample collected from well <br /> MW-2 indicating only a minor impact to ground water in the area assessed. <br /> • TPH-d was not analyzed by the laboratory for the October 2002 monitoring event due to all <br /> four TPH-d sample containers being broken while in custody of the laboratory. <br />' • Low concentrations of dissolved ethylbenzene and xylenes were detected in well MW-2 <br /> indicating a minor impact to ground water in the area assessed. <br /> • Low concentrations of dissolved MTBE and TBA continue to be detected in the sample <br /> collected from well MW-2 indicating only a minor impact to ground water in the area <br /> assessed. <br /> t • Low concentrations of 1,2-DCA continue to be detected in the samples collected from wells <br /> MW-1, MW-2 and MW-4 indicating only a minor impact to ground water in the area <br /> assessed. <br />' 5.0. RECOMMENDATIONS <br /> Based upon data collected during the fourth quarter 2002, AGE recommends: <br />' 0 Continued quarterly ground water monitoring and sampling of wells MW-1 through MW-4 <br /> until notified by the SJCEHD that either a reduction in the ground water monitoring program <br />' is warranted or that no further action is necessary at the site (i.e. site closure). <br /> • Prior to the next quarterly ground water monitoring event AGE will redevelop well MW-4. <br />' Generali only low to non-detect concentrations of petroleum constituents have been reported at the <br /> Y� Y p p <br /> site in wells MW-1 through MW-4,indicating that there is only a minor mass of dissolved petroleum <br />' hydrocarbons. Due to the low to non detectable concentrations of contaminants in the soil and <br /> ground water underlying the site,AGE recommends preparation of a closure summary report for the <br /> site. <br />' Advanced GeoEnvironmental,Inc. <br />