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i <br /> k"q KLEINFELDER <br /> 5.2. ANALYTICAL METHODS AND REPORTED RANGES <br /> Each of the groundwater samples collected were submitted for analysis. The following is a list of <br /> the requested analyses and the reported ranges for groundwater samples obtained from the <br /> h monitoring wells sampled; <br /> • Total Petroleum Hydrocarbons as gasoline [all non-detect< 50 µg/l] <br /> • Benzene . [all non-detect <0.50 gg/1] <br /> Toluene _ [all non-detect< 0.50 µg/1] - <br /> • Ethylbenzene [all non-detect< 0.50 gg/lj <br /> • Xylene [all non-detect<0.50 [tg11] <br /> • 1,2 DCA [non-detect<0.50 µg/1 to 110 µg/l] <br /> • EDB [all non-detect<0.50 µg/11 <br /> • TBA [all non-detect <5.0 µg/1] <br /> • MTBE [non-detect<0.50 µg/1 to 0.78 µg/1] <br /> • DIPE [non-detect <0.50 µg/1] <br /> • ETBE [non-detect<0.50 µg/1] <br /> • TAME [non-detect <0.50 µg/1] <br /> For a summary of analytical data for the analytes listed above, please see Table 2 behind the <br /> "Tables"tab of this report. <br /> There was no TPH-g detected in the seven groundwater samples collected at the site at or above <br /> the laboratory reporting limit of 50 µg/1. Similarly, no BTEX compounds were detected in the <br /> groundwater samples collected. <br /> 1,2-DCA was detected in 4 of the 7 groundwater samples. The detected concentrations ranged <br /> from 0.53 µg/l (MW-DIS-I Id) to 110 gg/l (MW-DIS-11s). It should be noted that 1,2-DCA was <br /> detected in the new monitoring well MW-DIS-15 with a concentration of 8.2 gg/l. The detected <br /> concentrations of 1,2-DCA exceeded the Primary Maximum Contaminant Level (PMCL) for 1,2- <br /> DCA of 5 µg/1 in 2 of the 4 samples. <br /> There were no detectable concentrations at or above the laboratory reporting limit for the <br /> oxygenates TBA, MTBE, DIPS, ETBE, and TAME in the groundwater sample collected from <br /> MW-DIS-15. However, MTBE was detected in MW-DIS-14s with a concentration of 0.78 gg/l. <br /> The Primary Maximum Contaminant Level (PMCL) for MTBE is 13 µg11 and the Secondary <br /> Maximum Contaminant Level (SMCL) for MTBE is 5 gg/l. The detected concentration of <br /> MTBE in MW-DIS-14s does not exceed the PMCL or the SMCL for MTBE. <br /> 12280.MON/ST03R897 Page 9 of 12. <br /> ©2003,Kleinfelder,Inc July 1,2003 <br />