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KLEINFELDER <br /> I EDB was not detected in any of the six groundwater samples analyzed. The six groundwater <br /> samples showed non-detect concentrations of EDB above the laboratory reporting limit (ND < <br /> JJ 5,0 ug/l). The water PMCL for EDB is 0.05 ug/l. <br /> I <br /> The six groundwater samples were also analyzed for the four oxygenates MTBE, DIPE, ETBE, <br /> j and TAME. The oxygenates DIPE, ETBE, or TAME were not detected in any of the groundwater <br /> samples submitted for laboratory analysis during this sampling event. However, MTBE was <br /> detected in groundwater sampled collected from MW-DIS-14s with a concentration of 7.0 ug/l. <br /> r The PMCL for MTBE is 13 uO and the SMCL for MTBE is 5 ug/l. The detected concentration <br /> of MTBE in MW-DIS-14s does not exceed the PMCL but does exceed the SMCL for MTBE in <br /> water. PMCLs are derived from health based criteria, whereas SMCLs are derived from human <br /> I welfare considerations such as taste and odor. <br /> All 6 groundwater samples were analyzed for TBA. TBA was not detected in any of the <br /> groundwater samples submitted for laboratory analysis. <br /> ! <br /> i <br /> a <br /> I <br /> ,1 <br /> I <br /> 'i <br /> 12280.MON/ST02RI34 Page 10 of 14 <br /> OO 2002,Kleinfelder,Inc July 26,2002 <br /> i <br />