Laserfiche WebLink
4.0 DISCUSSION <br /> 4.1 MW-4 <br /> IGroundwater from MW-4 shows continued contamination from TPH-gasoline, oxygenates and <br />' BETX It remains free from TPH-diesel and motor oil contamination, indicating that MW-4 has <br /> not been affected by contamination from the former diesel and used oil USTs The source of the <br />' gasoline contamination is unknown at this time <br />' 4.2 Waste Oil USTs <br /> Analysis of MW-2 sampled on 28 March 2001 shows a significant decrease in contamination <br /> from motor oils, TPH-gasoline and MTBE BETX and DIPE remain at low levels The former <br /> waste oil USTs continue to be an apparent source of groundwater contamination from a number <br />' of petroleum hydrocarbons <br /> 4.3 Diesel USTs <br /> MW-1 (site of the former diesel USTs) continues to show contamination from diesel The TPH- <br /> diesel contamination levels are decreasing significantly, as shown in Figure 5 No other targeted <br /> contaminates are evident <br /> MW-2 continues to be free of diesel contamination, and MW-3 remains uncontaminated It <br /> appears that contamination from diesel remains confined to the location of the former diesel <br /> USTs, and does not pose a significant threat to groundwater downstream <br /> 4.4 Floating Oil <br />' A September 1998 sample of groundwater monitoring well MW-2 found black, floating oil that <br /> appeared to be typical of used motor oil Floating oil has been removed from MW-2, using <br /> disposable bailers, periodically Approximately 9 1 gallons of floating oil have been removed <br /> through 28 March 2001 <br /> I <br /> Environeenng,Inc Project No 01-003 10 Page 4 <br /> I <br />