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The groundwater samples were contained to laboratory-supplied containers, and transported in <br /> an iced cooler with chain-of-custody documentation to Excelchem Environmental Labs <br /> (Excelchem), a state of California certified analytical laboratory (#2119) Excelchem analyzed <br /> the groundwater samples for TPH-as-gasoline, benzene, toluene, ethylbenzene, and xylenes <br /> (BTEX) by EPA Method 802018015M, and for MTBE, di-isopropyl ether (DIPE), ethyl-t-butyl ether <br /> (ETBE), tert-amyl methyl ether (TAME), tert-butanol (TBA) and 1,2-DCA by EPA Method 8260B <br /> Analytical results of the groundwater samples indicate that dissolved concentrations of gasoline <br /> hydrocarbons continue to exist in groundwater beneath the site Consistent with previous <br /> quarterly groundwater sample analytical results BTEX compounds were not detected in any of <br /> the groundwater samples TPH-as-gasoline was detected in two of the wells, at a maximum <br /> concentration of at a concentration of 170 µg11 at MW-7 MTBE was detected in five of the wells, <br /> ata maximum concentration of 150 µg11 at MW-7 1,2-DCA was detected in five wells, at a <br /> maximum concentration of 19 µg/l at MW-5 Groundwater from Irrigation Well #2 did not contain <br /> detectable concentrations of any of the gasoline compounds The cumulative analytical results <br /> are summarized in Table 2, and the laboratory reports are included in Appendix A <br /> 6 <br />