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�I kn KLEINFELDER <br /> 1 . <br /> i 5.2. ANALYTICAL METHODS AND REPORTED RANGES <br /> I <br /> Each of the 6 groundwater samples were submitted for analysis. The following is a list of the <br /> requested analyses and the reported ranges for groundwater samples obtained from the 6 <br /> monitoring wells; MW-DIS-11s, MW-DIS-lld, MW-DIS-12, MW-DIS-13, MW-DIS-14, and <br /> MW-DIS-14d: <br /> • Total Petroleum Hydrocarbons as gasoline [non-detect to 76 ug/1] <br /> • Benzene [non-detect to 0.42 ug/1] <br /> Toluene [all non-detect] <br /> • Ethylbenzene [all non-detect <br /> • Xylene [all non-detect] <br /> • 1,2 DCA [non-detect to 180 ug/1] <br /> • EDB [all non-detect] <br /> • TBA [all non-detect] <br /> ? • MTBE [non-detect to 7.0 ug/1] <br /> • DIPE [all non-detect] <br /> • ETBE [all non-detect] <br /> • TAME [all non-detect] <br /> For a summary of analytical data for the analytes listed above, please see Table 2 beneath the <br /> "Tables"tab of this report. <br /> The detected TPH-g was found in the groundwater sample collected from MW-DIS-11S with a <br /> concentration of 76 ug/l. TPH-g was not detected in the other five groundwater samples <br /> analyzed above the laboratory detection limit (<50 ug/1). <br /> Benzene was detected in one of the groundwater samples (1\4W-DIS-11s) analyzed with a <br /> concentration of 0.42 ug/l. The remaining five groundwater samples showed non-detect <br /> i concentrations of benzene above the laboratory reporting limit (ND < 0.3 ug/1), The Primary <br /> Maximum Contaminant Level (PMCL) for benzene is 1 ug/I. The detected concentration of <br /> benzene is below the PMCL for benzene in water in monitoring well MW-DIS-11s. <br /> Toluene, ethylbenzene, and xylene was not detected in any of the six groundwater samples <br /> collected for laboratory analysis. <br /> 1,2-DCA was detected in two of the six groundwater samples analyzed ranging from 7.2 ug/1 <br /> (MW-DIS-14s) to 180 ug/1 (MW-DIS-Ils). The remaining four groundwater samples showed <br /> non-detect concentrations of 1,2-DCA above the laboratory reporting limit (ND < 5.0 ug/1). The <br /> PMCL for 1,2-DCA is 5 ug/l. The detected concentration of 1,2-DCA in MW-DIS-11s and MW- <br /> I <br /> DIS-14s exceeded the PMCL for 1,2-DCA in groundwater. <br /> 12280.MON/3T02R134 Page 9 of 14 <br /> ©2002,Kleinfelder,Inc July 26,2002 <br />