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MW-3 this past quarter Diesel contamination in MW-1 and MW-4 was also found, indicating <br /> Or that diesel contamination is still affecting groundwater quality (Figure 5) J <br />' MW-4 was installed down gradient from MW-2 to detect possible movement of used motor oil <br /> in the groundwater from the contamination source (former waste oil USTs at MW-2) No oil <br /> was detected in the groundwater at MW-4, indicating that used oil contamination has not spread <br /> down gradient from MW-2 as far as MW-4 However, motor oils were detected in MW-3 <br />' indicating moderate spread of contamination Dtf� I"r, <br /> D n�� <br />' MW-4 showed contamination from gasoline, diesel, oxygenates and BTEX <br /> 52 Recommendations <br /> ET recommends <br /> 1 Continued removal of floating oil from MW-2 every two to four weeks, depending upon <br /> re-charge rate, until motor oils no longer appear <br /> 2 Continue quarterly monitoring of the four groundwater monitoring wells at CTL to <br /> accumulate data as a basis for future actions <br /> E <br /> E <br /> E <br /> E <br /> I <br /> • <br /> I <br /> Environeenng,Inc Project No 02 004 15 Page 6 <br /> E <br />