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HISTORICAL GROUNDWATER MONITORING DATA (9/27199 THROUGH 2121103) DATE DTW ELEV B T E X MTBE TPH-G OXYGENATES/ADDITIVES Detection Limits-i 0.5 0.5 0.5 1.0 0.5 0.05 0.5-5.0 Analytical 4g/L µg[L µg/l- µg/L F+g/L mg/L 4g/L Methods-+ 826013f 8260Bt 826013t 8260Bt 8260Bt 8015M$• 8260B Monitoring Well& Elevation MW-1 9/27/99 16.64 17.20 ND ND ND ND 2,700 ND EtOH,EDB,1,2-DCA-NA; (33.84) TBA-98;TAME-7.7 12/10/99 16.00 17.84 ND 0.6 ND ND 5,400 ND NA EtOH,EDS,1,2-DCA--NA; 3127100 14.18 19.66 5.2 2.3 3.0 7.8 11,600 0.19 TBA-1,130;TAME-58 6/23/00 15.62 18.22 2.6 0.6 5.7 7.2 770 0.09 NA 9/8100 17.61 16.23 NS NS NS NS NS NS NS 12/29/00 NM NM ND ND ND ND 8,800 0.09 TAME-28 1/16/01 16.15 17.69 NS NS NS NS NS NS NS 315101 15.74 18.1 ND ND ND ND 16,000 0.07 TAME-51 6/4/01 17.62 16.22 ND ND ND ND 27,000 ND TAME-100 9/10101 20.46 13.38 ND ND ND ND 23,000 0.28 ND 12/17/01 19.06 14.78 ND ND ND ND 13,000 ND ND (36.16#) 9/26102 21.81 14.35 <0.5 <0.5 <0.5 <1.0 1,700 <0.05 TAME-2.7 12/27/02 1933 16.83 <2.0 <2.0 <2.0 <4.0 23,000 <0.05 TBA-63:TAME--75 3121/03 18.08 18.08 <2.0 <2.0 <2.0 <4.0 2,800 <0.05 TAME-5.9 MW-2 9127199 16.32 17.33 ND ND ND ND 5,700 ND EtOH,EDB,1,2-DCA-NA; (33.65) TAME-16 12/10/99 15.70 17.95 1.5 ND 1.0 ND ND ND NA 3/27100 13.82 19.83 8.2 8.7 12 25 1.2 0.24 NA 6/23/00 15.65 18.00 5.5 1.0 8.2 16 95 0.16 NA 918100 17.73 15.92 NS NS NS NS NS NS NS 12/29/00 NM NM 1.0 0.6 2.2 1.6 ND 0.09 ND 1/16/01 15.89 17.76 NS NS NS NS NS NS NS 3/5/01 15.52 18.13 0.5 ND 1.5 0.9 ND 0.05 ND 6/4/01 17.30 16.35 ND ND ND ND NO ND ND 9/10101 19.20 14.45 37 19 53 90 ND 0.63 ND 12/17/01 18.75 14.90 ND 0.7 ND 0.9 4.1 ND ND r -- Y_ ^ 21.40 14.57 <0.5 <0.5 <0.5 <1.0 330 40.05 <0.5-5.0 - - -- - ---`-- - (35.97+) 9/26/02 i.&li7lu2 i y.16 16.01 'u.5 u5 �U.S i.0 s i w_5-5.0 3/21103 17.83 18.14 <0.5 <0.5 <0.5 <1.0 <0.5 <0.05 <0.5-5.0