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HISTORICAL GROUNDWATER MONITORING DATA(CONTINUED) (9/27/99 THROUGH 2121103) 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 µ911, µg/L µg/L µg/L µg/L mg1L µg/L Methods- 826013t 8260Et 8260Bt 826013t 8260Bt 8015M$- 8260B Monitoring Well& Elevation MW-5 (33.59) 12/29/00 NM NM 2.1 0.6 1.7 1.1 1.2 0.09 ND 1/16/01 15.87 17.72 NS NS NS NS NS NS NS 315/01 15.42 18.17 2.2 0.5 3.3 2.5 ND 0.07 ND 614101 17.40 16.19 1.4 ND 1.1 i.2 ND 0.05 ND 9/10/01 19.01 14.58 NS NS NS NS NS NS NS 12/17/01 18.61 14.98 5.0 9.9 3.3 15 1 ND 0.11 ND ---------------------------------- (35.93*) 9/26/02 DRY NM NS NS NS NS NS NS NS IV27/02 DRY NM NS NS NS NS NS NS NS 3121103 DRY NM NS NS NS NS NS NS NS MW-6 12/29/00 NM NM 0.4 0.4 0.7 ND 4.5 ND ND (33.72) 1/16/01 16.18 17.54 NS NS NS NS NS NS NS 315101 15.10 18.62 0.3 ND 0.8 0.7 ND ND ND 6/4/01 17.60 16.12 ND ND ND ND ND ND ND 9/10/01 19.64 14.08 ND ND ND ND 0.6 ND ND 12/17/01 18.84 14.88 0.4 0.7 0.4 1.9 20 ND ND (36.07*) 9!26102 22.02 14.05 NS NS NS NS NS NS NS 9/30/02 21.97 14.10 <0.5 <0.5 <0.5 <1.0 <0.5 <0.05 <0.5-5.0 12/27/02 19.06 17.01 <0.5 <0.5 <0.5 <1.0 <0.5 <0.05 <0.5-5.0 3/2l/03 18.02 18.05 <0.5 <0.5 <0.5 <1.0 <0.5 <0.05 <0.5-5.0 MW-7 12/29/00 NM NM 0.3 ND 0.9 0.7 1,000 ND TBA-42;TAME-5.8 (34.06) 1/16/01 16.42 17.64 NS NS NS NS NS NS NS 315101 15.98 18.08 ND ND 0.6 0.5 2.2 ND ND 614101 17.94 16.12 ND ND ND ND 8,300 ND TBA-90;TAME-36 9/10/01 19.72 14.34 ND ND ND ND 24,000 ND ND 12/17/01 19.32 14.74 ND ND ND ND 26,500 0.13 ND ------ ------- --------------------------- (36.42+) 9/26/02 21.61 14.81 <0.5 <0.5 <0.5 <1.0 12,000 <0.05 TAME-42 12/27/02 19.98 16.44 <2,0 <2.0 <2.0 <4.0 3,500 <0.05 TAME-18 3/21103 I 18.33 I 18.09 <2.0 I <2.0 <2,0 J <4.0 I 6,400 <0.05 I TAME-331