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4.0 GROUNDWATER ANALYTICAL RESULTS <br />' Groundwater laboratory analytical results are summarized in Table 1 <br />' TPHg was detected in three wells (MW-1, MW-3 and MW-5) with the highest concentration <br /> detected in MW-3 at 73 milligrams per liter (mg/1) Benzene was detected in two wells (MW-1 and <br /> MW-3) with the highest concentration in MW-3 at 910 micrograms per liter (ug/1) MTBE was <br /> detected in one well (MW-5) at a concentration of 15 ug/l Other FOCs were not detected above the <br /> laboratory reporting limits in samples collected from the groundwater monitoring wells Well AS-1 <br /> is located within the source area and is screened from 40 to 45 feet below ground surface (bgs) <br /> (deeper than the monitoring wells) The groundwater sample collected from AS-1 did not contain <br /> concentrations of TPHg, BTEX, or FOCs above the laboratory reporting limits Copies of the <br /> laboratory analytical reports and chain-of-custody documents for the groundwater samples are <br /> included in Appendix C <br /> The water samples collected from domestic wells DW-2R, DW-3, and DW-4 did not contain <br /> detectable concentrations of TPHg, BTEX or FOCs Copies of the laboratory analytical reports and <br />' chain-of-custody documents for the water samples collected from the domestic wells are included in <br /> Appendix C <br /> 1 <br /> Prosect No 58643-06-01 -9- rebruary 14 2005 <br />