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Historical Groundwater Monitoring Data (9/27/99 through 6/24/04) DATE DTW ELEV B T E X I MTBE TPR-G OXYGENATES/ADDITIVES Detection Limits--> 0.5 0.5 0.5 1.0 0.5 0,05 D.5-5.0 p9/L µg/L pg/L N9fL N81L mg/L V8n- Analytical Methods-* 8260Bt 8260Bt 8260Bt 8260Bt 8260Bt 8015M:- 8260E 1 Monitoring Well& Elevation MW-7(Continued) 3/21/2003 18.33 18.09 Q,0 Q.0 <2.0 <4.0 6,400 <0.05 TAME-33 6/25/2003 20.59 15.83 Q.0 <2.0 <2.0 <4.0 6,800 <0.05 TAME-28 7/22/2003 21.44 14,98 NA NA NA NA 6,800 NA NA 8/19/2003 22.12 14.30 NA NA NA NA 3,700 NA NA 9130/2003* 23.21 13.21 NS NS NS NS NS NS NS ' 10/31/2003 DRY NM NS NS NS NS NS NS NS E /26/2003 23.53 12.89 NS NS NS NS NS NS NS /31/2003 22.46 13.96 <0.5 <0.5 <0.5 <1.0 200 <0.05 TAME-0,8 /4/2004 21.02 15,40 <0.5 /24!2004 22.65 13.77 <0.5 <0.5 <0.5 <1.0 11 <O.OS <0 5-<5.0 MW-8 (34.06) 1/16/2001 16.45 17.61 ND ND ND ND ND ND ND 3/5/2001 16.0E 18.05 ND ND 1.1 0.8 ND ND ND 6/4/2001 17.92 16.14 ND ND ND ND ND ND ND 9/10/2001 20.76 13.30 0.5 0.6 1.8 3.4 4.9 ND ND 12/17/2001 19,30 14.76 ND 0.4 ND ND ND ND ND (36.43#) 9/26/2002 21.79 14.64 <0.5 <0.5 <0.5 <1.0 <0.5 <0.05 <0.5-<5.0 12/27/2002 19,85 16.58 <0.5 <0.5 <0.5 Q.0 93 <0.05 <0.5-<5.0 3/21/2003 18.34 18.09 <0.5 <0.5 <0.5 <1.0 <0.5 <0.05 <0.5-<5.0 6/25/2003 20.73 15,70 <0.5 <0.5 <0.5 <1.0 <0.5 <0.05 <0.5-<5.0 7/22/2003 21.76 14.67 NA NA NA NA <0.5 NA NA 8/19/2003 22.49 13.94 NA NA NA NA <0.5 NA NA 9/30/2003* 23.04 13.39 NS NS I NS NS NS NS NS 10/3112003 23.35 13.08 NS NS NS NS NS NS NS 11/2612003 NM NM NS NS NS NS NS NS NS 12/31/2003 22.72 13.71 <0.5 <0.5 <0.5 <1.0 <0,5 <0,05 <0.5-<5.0 3/4/2004 20,91 15.52 <0.5 <0.5 <0.5 <1.0 1 19 <0.05 <0.5-<5.0 6/24/2004 21.33 1 15.10 <0.5 1 <0.5 <0.5 <1.0 1 <0.5 <0.05 <0,5-<5.0 MW-9 (33.59) 6/15/2001 17.65 15.94 ND ND ND ND 15 ND ND 9/10/2001 19.56 14.03 5.4 5.7 17 30 NO 0.24 ND 12/17/2001 18.66 14.93 0.7 2.4 1.4 5.8 ND 0.06 ' ND ----------- (35.95*) _ 9/26/2002 21.91 14,04 <0.5 <0.5 <0,5 <1.0 0.8 <0.05 <0.5-<5.0 12/27/2002 18.83 17.12 <0.5 <0.5 <0.5 <1.0 2.1 <0,05 <0.5-<5.0 3/2112003 17.91 18.04 <0.5 I <0.5 <0.5 1 <1.0 2.5 <0.05 <0,5-<5.0 6/25/2003 21.28 14.67 <0.5 <0.5 <0.5 <1.0 <0.5 <0.05 <0.5-<5.0 7/22/2003 22.43 13.52 NA NA NA NA 3.2 NA NA 8/19/2003 23.15 12.80 NA NA NA NA 3,7 NA NA 9/30/2003 22.46 13.49 <0.5 <0.5 <0.5 <1.0 4.9 <0.5 <0.5-<5.0 10/31/2003 25.02 10.93 NA NA NA NA 1.4 NA NA 11/26/2003 23,72 12.23 NA NA NA NA 12 NA NA 12/31/2003 2L54 14,41 <0.5 10.5 <0.5 <k.0 4.3 <0.05 <0.5-<5.0 3/4/2004 19.73 16.22 <0.5 <0.5 <0.5 <1,0 2.4 <0.05 <0.5-<5.0 .�,�..�A, 13 44 1' AO n c -n_c it n 'n 5 'n ns j_�_c n • P:13000_prj13761 Boyett Manteca13761A Boyett Work Plans SRS Rep0rtlReportslQMR12Q0413761 Hist.G.W.Data 2004