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The groundwater samples were contained in laboratory-supplied containers, 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), MTBE, di-isopropyl ether (DIPE), ethyl-t-butyl <br /> ether (ETRE), 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 TPH-as-gasoline was detected <br /> at 140 µg/l in MW-6, at 93 µgll in MW-5, and at 72 µg/l in MW-3 and VW-2 MTBE was detected <br /> at 190 µg/1 in MW-7, at 150 µg/l in MW-3, at 120 µgll in MW-5, at 55 µgll in VW-2, at 2 9 µg11 in <br /> MW-6, and at 2 8 µgll in MW-2 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 /> 1 <br /> 1 i <br /> 1 <br /> 6 <br />