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The laboratory analyzed the groundwater samples for Total Petroleum Hydrocarbons (TPH)-as- <br /> gasoline, benzene, toluene, ethylbenzene, xylenes (BTEX) and methyl tertiary butyl ether <br /> (MTBE) by modified EPA Method 801518020. The laboratory reports and chain-of-custody <br /> documents are included as Appendix A. <br /> Analytical results of the groundwater samples indicate that dissolved concentrations of gasoline <br /> hydrocarbons mcontinue to exist in groundwater beneath the site. Groundwater sampled from <br /> } VW-2 contained 4,200 parts per billion (ppb) of TPH-as-gasoline, 470 ppb of benzene and 1,000 <br /> ppb of MTBE. Groundwater sampled from VW-1, MW-6 and MW-7 did not contain detectable <br /> concentrations of TPH-as-gasoline or BTEX. MTBE was detected in VW-1 at a concentration of <br /> 20 ppb. MTBE was not detected in MW-6 and MW-7. The current and historical analytical <br /> { results are summarized in Table 2. <br /> �F <br /> r <br /> R <br /> 1 <br /> I <br /> d <br /> III <br /> E �4 <br /> 4 <br />