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Ile <br /> 20023 rd Quarter Groundwater Report <br /> Frontier Transportation <br /> 1102-194 <br /> November 26, 2002 <br /> Page 5 <br /> 5.0) CONCLUSIONS AND RECOMMENDATIONS <br /> Based on groundwater sample analysis results, the dissolved TPH-g and BTEX plumes <br /> appear to be localized near the former UST locations No detectable concentrations of dissolved <br /> TPH-d, TPH-g, BTEX, and MTBE were identified in eleven of the thirteen monitoring wells <br /> dedicated to the site However, the identification of dissolved MTBE in MW-1 maybe an <br /> indicator that lateral migration of MTBE may be occurring <br /> BEII recommends that quarterly groundwater monitoring continue at the site until <br /> constant or decreasing dissolved petroleum hydrocarbon concentrations are observed <br /> Groundwater samples 4 will be analyzed for BTEX using EPA method 8020, TPH-d and TPH-g <br /> using EPA method 8015m, and oxygenates using EPA method 8260 in all future monitoring <br /> episodes as directed by the PHS/EHD <br /> I • ' <br /> i <br /> • <br />