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I location Results of thesampling roundwater >ndicate that TPHG impact to groundwater is <br /> g <br /> limited to the area immediately surrounding boring CPT-2 and wells MW-13, MW-14, and AS-1 <br /> (Figure 2) Concentrations of 1,2-DCA were reported in borings CPT-2 through CPT-5, and <br /> CPT-8, at concentrations ranging from 1 3 micrograms per liter (µg/L) to 140 µg/L The highest <br /> 1,2-DCA concentrations were reported in samples collected from approximately 70 to 80 feet <br /> bgs Benzene or MTBE were not detected in any groundwater samples collected during the CPT <br /> investigation Analytical data from the CPT investigation suggest the vertical limit of 1,2-DCA <br /> impacted groundwater is approximately 100 feet bgs, and has been adequately characterized, <br /> except in the vicinity of CPT-8 The lateral extent of 1,2-DCA impact has been adequately <br /> characterized, except to the east of CPT-5 and to the east and southeast of CPT-8 Additional <br /> Iassessment in these areas is warranted <br /> I <br /> I <br /> 1 ' <br /> 1 <br /> K\TowlenlStockton 1031Reportslscm 04 2006 doe Page 2 5'MATUS <br />