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HISTORICAL GROUNDWATER MONITORING DATA (CONTINUED) (9/27/99 THROUGH 6125/03) DATE DTW ELEV B T• E X MTBE TPH-G OXYGENATES/ADDITYVES v Detection Limits-i 0.5 0.5 0.5 1.0 0.5 0.05 0.5-5.0 Analytical ggfL µg/L µg/L µg/L µg/L mg/L gg/L Methods-). 8260Bt 826013t 8260BT 826013t 8260131 8015M:• 8260B Monitoring Well Bt Elevation MW-2 3121/03 17.83 18.14 <0.5 <0.5 <0.5 <1.0 <0.5 <0.05 <0.5-5.0 (35.970 6125/03 20.55 15.42 <0.5 <0.5 <0.5 <1.0 18 <0.05 <0.5-5.0 MW-3 EtOH,EDB,1,2-DCA,TAME-NA; (33.81) 4/27/99 16.61 17.20 ND 0.4 ND ND ND ND ND 12/10/99 15.92 17.89 ND ND 0.4 ND 2,100 ND NA 3127100 14.81 19.00 5.2 2.7 3.5 8.8 7,300 ND NA 6/23/00 15.66 18.15 11 1.3 12 22 940 0.22 NA 9/8/00 17.57 16.24 NS NS NS NS NS NS NS 12/29/00 NM NM ND ND ND ND 130 ND ND 1/16/01 16.13 17.68 NS NS NS NS NS NS NS 3/5/01 15.74 18.07 ND ND ND ND 290 ND ND 614101 17,59 16.22 ND ND ND ND 3.3 ND ND 9110/01 19.38 14.43 ND ND ND ND ND ND ND 12/17/01 19.06 14.75 ND ND ND ND 9.6 ND ND ------------- (36.18+) 9/26/02 21.26 14.92 <0.5 <0.5 <0.5 <1.0 _ <0.5-W <0.05 <0.5-5.0 _ �- i 12/27/02 19.68 16.50 <0.5 <0.5 <0.5 <1.0 12 <0.05 <0.5-5.0 3121/03 18.03 18.15 <0.5 <0.5 <0.5 <1.0 <0.5 <0.05 <0.5-5.0 6125103 20.27 15.91 <0.5 <0.5 <0.5 <1.0 <0.5 <0.05 <0.5-5.0 MW-4 EtOH,EDB,1,2-DCA,TAME-NA; 9127/99 15.74 17.32 ND ND ND ND 140 ND ND (33.06) 12/10/99 15.17 17.89 0.5 ND 0.4 ND 34 ND NA 3127/00 13.21 19.85 1.5 2.9 4.0 9.2 43 0.11 NA 6123100 14.98 18.08 3.9 0.9 7.2 14 81 0.13 NA 9/8100 16.62 16.44 NS NS NS NS NS NS NS 12/29/00 NM NM 0.7 0.5 1.8 1.5 110 0.13 ND 1116101 15.31 17.75 NS NS NS NS NS NS NS 3/5/01 14.93 18.13 0.4 ND 1.5 0.9 83 0.06 ND 6/4/01 16.68 16.38 ND ND ND ND 130 ND ND 9/10/01 18.56 14.50 5.5 4.0 14 24 47 0.18 ND 12/17/01 18.18 1 14.88 2.0 6.0 1 2.3 11 1 174 1 0.09 1 ND