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Each of the four monitoring wells (MW-6, MW-7, VW-1 and VW-2) was purged of at least three <br /> ' well volumes using a decontaminated bailer Following purging and recharge, groundwater <br /> samples were collected from the four wells using dedicated and disposable sampling bailers <br /> Irrigation Well #2 was allowed to flow at the wellhead until the downhole pump was automatically <br /> activated A groundwater sample was collected directly at the wellhead through a sample port <br /> The groundwater samples were contained in laboratory-supplied glassware, labeled, and <br /> packed in an iced cooler for transport with chain-of-custody documentation to Kiff Analytical, LLC <br /> (Kiff) a state of California certified analytical laboratory (#2236) <br /> Kiff analyzed the groundwater samples for Total Petroleum Hydrocarbons (TPH)-as-gasoline, <br /> benzene, toluene, ethylbenzene, xylenes (BTEX), methyl-t-butyl ether (MTBE), dnsopropyl ether <br /> (DIPS), ethyl-t-butyl ether (ETBE), tert-amyl methyl ether (TAME), tert-butanol (TBA) and 1,2- <br /> dichloroethane (1,2-DCA) by EPA Method 8260B 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 150 parts per billion (ppb) of TPH-as-gasoline, 0 5 ppb of toluene, 4 4 ppb of <br /> ethylbenzene, 1 2 ppb of xylenes, 210 ppb of MTBE, 13 ppb of TBA and 26 ppb of 1,2-DCA <br /> Groundwater sampled from VW-1 was non-detect for TPH-as-gasoline, but contained 1 4 ppb of <br /> I <br /> MTBE For the first time, groundwater collected from MW-7 contained detectable concentrations <br /> of gasoline hydrocarbons (21 ppb of MTBE and 7 7 ppb of 1,2-DCA) Groundwater sampled <br /> from MW-6 and Irrigation Well #2 did not contain detectable concentrations of TPH-as-gasoline, <br /> BTEX, oxygenates (MTBE, DIPS, ETBE, TAME, TBA), or 1,2-DCA The historical analytical <br /> results from (1990 through 1998) are summarized in Table 2 The current and more recent <br /> analytical results (1999 through 2000) are summarized in Table 3 <br /> 5 <br />