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The groundwater samples were contained in laboratory-supplied containers, labeled, and <br /> • <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), MTBE, di-isopropyl ether(DIPS), ethyl-t-butyl <br /> ether (ETBE), tert-amyl methyl ether(TAME), tert-butanol (TBA) and 1,2-DCA by EPA Method <br /> ' 8260B The laboratory reports and chain-of-custody 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 The groundwater sample <br /> collected from MW-3 contained the highest concentrations of TPH-as-gasoline (63 µg/l), MTBE <br /> (220 µg11) and 1,2-DCA (38µg/1) TPH-as-gasoline was not detected in any of the other wells <br /> BTEX compounds were not detected in any of the groundwater samples MTBE was detected in <br /> ' five of the eight monitoring wells sampled As shown on the isoconcentration map for MTBE in <br /> groundwater(Figure 4), the lateral extent of MTBE is not defined The cumulative analytical <br /> ' results are summarized in Table 2 <br /> lie <br /> 1 <br /> • 6 <br />