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,%Vow <br /> 4th Quarter 2006 Report <br /> Thrifty#172 <br /> Page 2 <br /> Groundwater Conditions: <br /> TPHS concentration ND<5..6 to 316,000 <br /> ... .......... <br /> Benzene concentration (u ND<0.32 to 2,050 <br /> .......—----------------- <br /> Toluene concentration (u& ND<0.10 to 31,200 <br /> ............. <br /> ND<0.24 to 6,680 <br /> Ether enzene concentration(ugh. <br /> Total.,Xlens ........ <br /> yconcentration ND<0.3 to 38,200 <br /> MTBE concentration ug/L): ND<0.63 to 1.09 <br /> DIPE concentration-LU9U' ND<0.29 to <29 <br /> ETBE concentrationL <br /> (u ND<O.17 to <17 <br /> 9 <br /> TAME n concentrati (49/LL <br /> .q— — ND<0.28 to <28 <br /> TBAconcentiati n to 16 <br /> .................. ND<10 <br /> ............ <br /> Remediation Activity: <br /> *e:..—....—...-- MPE <br /> start-up 4/26/200'-1 <br /> ............. <br /> this 145 <br /> ............ <br /> Cumulative Operation(hrs. 33,739 <br /> .......... <br /> GW discharge this None ............. <br /> Total GW discharge .......... <br /> � 582,804 <br /> extracted this quarter (lbs.): 895 <br /> ........................................ .................-.................. <br /> Total.k4r(jcarbops extracted j lbs. : 161,066 <br /> ) <br /> Hydrocarbon removal rate (lbs/hour) from 4.77 _ <br /> ­—----- <br /> Hydrocarbon removal rate (lbs/hour)this 6.17 <br /> ..........----........................ <br />