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wells using dedicated and disposable sampling bailers The groundwater samples were <br /> contained in laboratory-supplied glassware, labeled, and packed in an iced cooler for transport <br /> under chain-of-custody documentation to Kiff Analytical, LLC (Kiff) a state of California certified <br /> analytical laboratory (#2236) <br /> 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 8015/8020 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 continue to exist in groundwater beneath the site Groundwater sampled from <br /> VW-2 contained 3,200 parts per billion (ppb) of TPH-as-gasoline, 70 ppb of benzene and 870 <br /> ppb of MTBE Groundwater sampled from VW-1 contained 4,100 ppb of TPH-as-gasoline and <br /> 10 ppb of MTBE The TPH-as-gasoline result for VW-1 was reported as atypical of gasoline <br /> According to the laboratory manager, the detected concentrations of gasoline-range <br /> ' hydrocarbons may be associated with the glues used to connect the remediation system piping <br /> Groundwater sampled from MW-6 and MW-7 did not contain detectable concentrations of TPH- <br /> as-gasoline, BTEX or MTBE The current and historical analytical results are summarized in <br /> Table 2 <br /> 4 <br />