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• Kiff analyzed the groundwater samples for Total Petroleum Hydrocarbons (TPH)-as-gasoline, <br /> benzene, toluene, ethylbenzene, xylenes (BTEX) and methyl-tertiary-butyl ether(MTBE) by EPA <br /> Method 8260B The laboratory reports and chain-of-custody documents are included as <br /> 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 /> VW-2 contained 1,200 parts per billion (ppb) of TPH-as-gasoline, 16 ppb of benzene and <br /> 950 ppb of MTBE Groundwater sampled from VW-1 contained 260 ppb of TPH-as-gasoline <br /> and 6 7 ppb of MTBE Groundwater sampled from MW-6 and MW-7 did not contain detectable <br /> concentrations of TPH-as-gasoline, BTEX or MTBE The current and historical analytical results <br /> are summarized in Table 2 <br /> �I <br /> r <br /> 5 <br /> r <br />