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k" KLEIN FELDER <br /> 1,2-DCA was detected in seven of the twelve groundwater samples analyzed ranging from 0.90 <br /> ug/l (MW-DIS-12) to 1,500 ug/l (NP-1-80'). This sampling event marks the first time 1,2-DCA <br /> was detected in MW-DIS-12. The remaining five groundwater samples showed non-detect <br /> concentrations of 1,2-DCA at or above the laboratory reporting limit(ND < 0.5 ug/1). The <br /> PMCL for 1,2-DCA is 5 ug/l. <br /> EDB was detected in one groundwater samples analyzed (NP-1-80'). The detected concentration <br /> of EDB was 1,100 ug/l. The remaining eleven groundwater samples showed non-detect <br /> concentrations of EDB at or above the laboratory reporting limit(ND <0.5 ug/1). <br /> The six groundwater samples were also analyzed for the four oxygenates MTBE, DIPE, ETBE, <br /> and TAME. MTBE was detected in the groundwater sample collected from MW-DIS-14s with a <br /> concentration of 9.9 ug/l. This marks the second consecutive time that MTBE has been detected <br /> in MW-DIS-14s. MTBE was not detected in the remaining eleven samples. No other <br /> oxygenates were detected at or above the laboratory reporting limits. <br /> All 12 groundwater samples were analyzed for TBA. TBA was not detected in any of the <br /> groundwater samples submitted for laboratory analysis. <br /> I • <br /> 12280-MON 1 STO2R519 Page 10 of 14 <br /> ©2002,Kleinfelder,Inc September 19,2002 <br />