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(BTEX) with Methyl tert-Butyl Ether {MTBE) by EPA Method 8020 <br />'. Fuel oxygenated compounds — di-isopropyl <br /> ether (DIPE), ethyl-t-butyl ether (ETBE), <br />' tert-amyl methyl ether(TAME), t-butanol (TBA) by EPA Method 8260 <br /> 3.3 Floating Oil <br /> Floating oil has been removed from MW-2 periodically, starting in January 2000 A total of <br /> approximately 13 4 gallons of oil has been removed and the results are summarized in Table 3 <br />' 4.0 DISCUSSION <br />' 4.1 MW-4 <br /> Groundwater from MW-4 shows new contamination from TPH-diesel It is now apparently free <br />' from TPH-gasoline, oxygenates, BETX and motor oil contamination <br /> 4.2 Waste Oil USTs <br /> Analysis of MW-2 sampled on 19 September 2001 shows no change in contamination from <br /> TPH-gasoline and MTBE BETX and DIPE increased slightly MW-2 showed indication of <br /> motor oils present as reflected in the amount of floating oil removed during the past quarter, <br /> however, the analytical results indicated that motor oils are no longer present MW-1, MW-3 <br /> and MW-4 continue to remain free of motor oil contamination <br /> 4.3 Diesel USTs <br /> MW-1 (site of the farmer diesel USTs) showed contamination from diesel The TPH-diesel <br /> t <br /> ontamination levels have increased from zero to 59 ppm, as shown in Figure 5 No other <br /> argeted contaminates are evident <br /> MW-2 continues to be free of diesel contamination, and MW-3 remains uncontaminated <br /> However, diesel contamination did appear in MW-4 <br /> Environeering,Inc Project No 01-009 012 Page 4 <br />