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' 2006 2aa Quarter Groundwater Q ate Report <br />' Frontier Transportation, Inc. <br /> August 2, 2006 <br /> Page 7 <br />' 5.0) WASTE MANAGEMENT <br />' Any free product, purged groundwater, and decontamination water generated from the <br /> site during sampling activities will be stored in sealed 55-gallon drums for a period not to exceed <br /> 90 days Stored wastes will be profiled for hazardous constituents and characterized as Non- <br /> Hazardous, California Hazardous, or RCRA Hazardous, as appropriate Any transportation of <br /> waste will be under appropriate manifest <br /> 6.0) CONCLUSIONS AND RECOMMENDATIONS <br /> Based on groundwater sample analysis results, the dissolved MTBE plume appears to be <br /> continuing to expand westward The appearance of product (sheen) indicates that a contaminant <br /> source is present and needs to be removed Concentrations of dissolved TPH-g were identified'#1 <br /> mainly near the contaminant source area, with the exception of MW-9 to the west of the area44,( rnf +° <br /> The identification of elevated levels of dissolved MTBE in 7 wells indicates that lateral <br /> migration of MTBE is continuing to occurr beneath the site <br /> 5 �Ob <br /> Migration of MTBE indicates that corrective action needs to be initiated to prevent <br /> additional migration BEA recommends that quarterly groundwater monitoring continue at the <br /> site until constant or decreasing dissolved MTBE concentrations are observed Groundwater <br /> samples will be analyzed for TPH-g using EPA method 8015m and for oxygenates and BTEX <br /> using EPA method 8260 in all future monitoring episodes as directed by the PHS/EHD <br /> r <br />