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HISTORICAL GROUNDWATER MONITORING DATA (CONTINUED) <br /> (9/27/99 THROUGH 9130/02) <br />' DATE DTW ELEV B T E X MTBE TPH-G OXYGENATES/ADDITIVES <br />' Detection Limits-> 0.5 0.5 0.5 1.0 0.5 0.05 0.5-5.0 <br /> Analytical IM µg/1 µgel µg/l 4g/1 rng/1 gg/1 <br /> Methods-+ 826013t 8260Bt 8260Bt 826013t 8260Bt 8015M: 8260B <br />' Monitoring Well& <br /> EIevation <br /> MW-9 6/15/01 17.65 15.94 1 ND ND ND ND 15 ND ND <br /> (33.59) <br /> 9110101 19.56 14.03 5.4 5.7 17 30 ND 0.24 ND <br /> 12/17/01 18.66 14.93 0.7 2.4 1.4 5.8 ND 0.06ND <br /> - (35.95[•) .. M x9/26/02 21.91 14.04 <0.5 <0.5 <0.5 <I.0 0.8 <0.05 - - -<0.5 5.0 .. <br /> 9127/99 through 12/17/01 Groundwater Data Collected by Others <br /> (ELEV)=Groundwater elevation relative to NAVD 88 damn <br /> Well collar elevation resurveyed on September 30,2GG2 <br /> (ELEV+)=Groundwater elevation relative to NAVD 88 datum <br /> DTW=Depth to water in feet below top of casing <br /> Unit Conversions: Analytical: <br /> pg/1:parts per billion(ppb) B,'r,E,X=benzene,toluene,Ethyl benzene,and total xylenes. <br /> mg/I:parts per million(ppm) TPH-G=total petroleum hydrocarbons,quantified as gasoline. <br /> Oxygenates/additives include: Methyl-t-Butyl Ether(MTBE),Ethanol(EtOW,t-Butanol(TSA), <br /> Di-Isopropyl Ether (DIPS), Ethyl-t-Butyl Ether (STBE), t-Amyl Methyl Ether (TAME), l,2- <br /> NA-not analy(EDB),and 1,2-Dichloroethane(1,2-DCA). <br /> NA®not analyzed. <br /> ND=not detected. <br /> NM=not measured. <br /> NS=not sampled. <br /> t=BTEX constituents collected prior to 9!26/02 were analyzed by EPA Method 8021 B. <br /> =Samples collected prior to 9/26/02 were analyzed for'rPH-G by Method 5030/Luft <br />