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' Kiff analyzed the groundwater samples for Total Petroleum Hydrocarbons (TPH)-as-gasoline, <br /> • benzene, toluene, ethylbenzene, xylenes (BTEX), MTBE, diisopropyl ether (DIPE), ethyl-t-butyl <br /> ether (ETBE), Cert-amyl methyl ether (TAME), tert-butanol (TBA) and 1,2-DCA by EPA Method <br /> 8260B The laboratory reports and chain-of-custody documents are included as Appendix A <br /> ' Analytical results of the groundwater samples indicate that dissolved concentrations of gasoline <br /> hydrocarbons continue to exist in groundwater beneath the site Groundwater sampled from <br /> 1 VW-2 contained 73 µg11 of TPH-as-gasoline, 130 µg11 of MTBE, 5 2 µg11 of TBA and 18 µg11 of <br /> 1,2-DCA MTBE was detected in seven of the nine monitoring wells sampled, at a maximum <br /> ' concentration of 200 µg11 in MW-3 As shown on the isoconcentration map for MTBE in <br /> groundwater (Figure 4), the lateral extent of MTBE is not defined The cumulative analytical <br /> results are summarized in Table 2 <br /> 1 <br /> ! 6 <br />