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} HISTORICAL GROUNDWATER MONITORING DATA (9127199 THROUGH 6125/03) DATE DTW ELEV B T E X MTBE TPH-G OXYGENATES/ADDITIVES Detection Limits-+ 0.5 0.5 0.5 1.0 0.5 0.05 0.5-5.0 Analytical pS/E µg/L µg/L µg/L µg/L mg/L µg/L Methods-+ 8260BT 8260BT 8260Bt 8260Bt 82608t 8015MI- 8260B Monitoring Well& Elevation MW-1 EtOH,EDB,1,2-DCA-NA; 9/27/99 16.64 17.20 ND ND ND ND 2,700 ND (33.84) TBA-98;TAME-7.7 12/10/99 16.00 17.84 ND 0.6 ND ND 5,400 ND NA EtOH,EDB,1,2-DCA-NA; 3/27/00 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 9/8/00 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 6/4101 17.62 16.22 ND ND ND ND 27,000 ND TAME-100 9110/01 20.46 13.38 ND ND ND ND 23,000 0.28 ND 12/17/01 11 19.06 14.78 ND ND ND ND 13,000 ND ND (36.16+) 9126/02 21.81 14.35 <0.5 <0.5 <0.5 <1.0 1,700 <0.05 TAME-2.7 12/27/02 19.33 16.83 <2.0 <2.0 <2.0 <4.0 23,000 <0.05 TBA-63:TAME-75 3/21103 18.08 18-08 <2.0 <2.0 <2.0 <4.0 2,800 <0.05 TAME-5.9 6125/03 20.82 15.34 <2.0 <2.0 <2.0 <4.0 10,000 <0.05 TAME-33 MW-2 4127/99 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 3/27/00 13.82 19.83 8.2 8.7 12 25 1.2 0.24 NA r 6/23/00 15.65 18.00 5.5 1.0 8.2 16 95 0.16 NA 9/8100 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 315101 15.52 18.13 0.5 ND 1.5 0.9 ND 0.05 ND 6/4101 17.30 16.35 ND ND ND ND ND ND ND 9110101 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 (35.97*) 9126/02 21.40 14.57 <0.5 <0.5 <0.5 <1.0 330 <0.05 <0.5-5.0 12/27/02 19.16 16.81 <0.5 <0.5 <0.5 <1.0 1 I <0.05 <0.5-5.0