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TABLE 2 Historical Groundwater Monitoring & Analytical Data ARCO Service Station No. 2130 7906 N. EL Dorado Street, Stockton, CA Well Na. Date P/NP TOC DTW SPH GWE GRO B T E X MTBE TBA DIPE ETBE TAME Ethanol 1,2-DCA EDB DO fAmlogNs [tt-MSL) (feet) (feet) (iPMSL) 14g/L) (4B (P8)L) IP81L) (I181L) (481L) (y81L) IY91L) (MgIL) (PgIL) (Pg/L) (Pg/L) [P91L) VW4 06/24/04 P - 43.96 0.00 - X50 <0.50 <0.50 <0.50 <0.50 <0.50[21 <20 <0.50 <0.50 <0.50 <l D0 51 - 2.44 WATER 0920/04 P 48.13 0.00 - 110 <0.50 <0.50 <0.50 <0.50 <0.50[2] <20 <1 .0 <1 .0 <1.0 <100 2.9 - 1 .50 - 12J20/04 P 44.59 0.00 - 190 J <0.50 <0.50 <0.50 <0.50 <0.50[2] <20 <1 .0 <1 .0 41.0 <100 5.6 - 2.40 - 03/27/05 P 41 .31 0.00 - 150 0.50 <0.50 <0.50 <0.50 <0.50[2] <20 <1 .0 <1 .0 41.0 <100 52 - 1 .60 - 06/19/05 P 41 .83 0.00 - 220J <0.50 <0.50 <0.50 <0.50 <0.50[2] <20 <0.50 <0.50 <0.50 <100 1 .3 - 1 .40 - 09111/05 P 46.31 0.00 - 210 <0.50 <0.50 <0E0 <0.50 <0.5012] <20 <0.50 <0.50 <0.50 <100 1.1 - 1 .20 12/11/05 P 43.03 0.00 - 230 0.50 J <0.50 <0.50 <0.50 <0.50[2] <20 <0.50 <0.50 <0.50 <100 UJ 5.1 - 1 .04 - 03/19/06 P 39.74 0.00 - 370 J <0.50 UJ <0.50 UJ <0.50 W <0.50 UJ <0.50 [2]UJ <20 UJ <0.50 UJ <0.50 UJ <0.50 W <300 UJ 3.7 J - 1 .00 - 06/13/06 P 39.68 0.00 - 170 <0.50 <0.50 <0.50 <0.50 <0.50 <20 <0.50 <0.50 <0.50 <300 0.54 - 1 .20 - 09/12/06 P 16.00 45.00 0.00 -29.00 250 <0.50 <0.50 <0.50 <0.50 <0.50 <20 <0.50 <0.50 <0.50 <300 0.56 - 1 .10 - 12/14106 P 42A2 6.00 -26A2 230 40.50 46.50 <0.50 40.50 40,50 <20 <0.50 40.50 40,50 4300 3.6 m 1.72 VW-5 12/19/02 - 41 .11 0.00 - 110 4.0 1 .1 0.76 0.75 6.0[2] 16 0.67 <0.50 40.50 03/06/03 P 39.61 0.00 - 570 3.0 0.65 <10 <10 5.1 [2] <400 0.91 <10 <10 <21000 660 <10 5.60 - 06/11/03 P 38.77 0.00 - <50 <0.50 <0.50 <0.50 <0.50 <0.50[21 <20 <1 .0 <1 .0 <1.0 <100 - - 3.12 - 09/24/03 P 42.80 0.00 - 110 0.91 <0.50 <0.50 <0.50 <0.50[21 <20 <1 .0 <7.0 <1.0 <100 - - - - 12/10/03 P 41 ,15 0.00 - 260 1 .2 <0.50 <050 <0.50 <0.50[21 <20 <1 .0 <1 .0 41.0 <100 48 - - - 03108/04 P 39.67 0.00 - 150 1 .0 <0.50 <0.50 <0.50 <0.50[2] <20 <1 .0 <1 .0 41 .0 <100 31 - 3.08 - 06/24/04 NP 44.68 0.00 - 110 <25 <25 <25 <2Z <2.5[2] <100 <2.5 <2.5 25 <500 220 - 1 .57 WATER 0920/04 P 48.68 0.00 - 150 <5.0 <5.0 <5.0 <5.0 <5.012] <200 <10 <10 <10 <16000 140 - 1 .10 - 122l/04 P 45.15 0.00 - 380 <25 25 <2.5 <2.5 3.8[2] <100 <5.0 <5.0 <5.0 <500 620 J - 0.70 WATER 0327105 P 42.07 0.00 - 150 <5.0 <5.0 <5.0 <5.0 <5.0[2] <200 <70 <10 <to <1 ,000 170 - 2.10 - 06/19/05 P 42.34 0.00 - 130 J 2.3 J <0.50 <0.50 <0.50 3.4 [2]J <20 1 .2 <0.50 <0.50 <100 100 - 1 .30 - 09/11/05 P 46.93 0.00 - <100 2.0 <ta <1 .0 <1 .0 3.1 [2] <40 <1 .0 <1.0 41.0 <200 110 - 2.00 - 12111/05 P 43.70 0.00 - <250 <2.5 <25 <25 2.8 25[2] <100 <2.5 <2.5 <25 <500 UJ 280 - 1 .70 - 03/19/06 P 43.39 0.00 - 140 J <0.50 W <0.50 UJ <0.50 UJ <0.50 UJ 5.9 [21J <20 UJ 0.90 J <0.50 UJ <0.50 W <300 UJ 190 J - 1 .20 06/13/06 P 40.11 0.00 - 130 1 .2 <0.50 <0.50 <0.50 3.3 <20 0.70 <0.50 <0.50 <300 210 - 1 .50 - 1 09/12/06 P 16.42 45.63 0.00 -29.21 220 <5.0 <5.0 <5.0 <5.0 <5.0 <200 <5.0 45.0 <5.0 <3,000 280 - 1 .80 - 9 12/14106 P 43.00 0.00 -26.50 140 <2.5 42.5 <2.5 Q.5 42.5 425 42.5 42.5 42.5 41,560 270 1.24 VW-6 03106/03 - - _ _ _ _ _ _ - _ _ - _ _ _ _ - - 12J10/03 - - - _ _ _ _ _ - - - - _ _ - - DRY 03108104 _ _ _ _ _ _ _ _ _ _ - - - _ _ - - _ DRY 0623104 NP - - - - - - - - - - - - - - - - - DRY 09/20/04 _ _ - _ _ _ _ _ _ _ - - _ DRY 12/20/04 - - - - - - _ _ _ _ _ _ _ - - _ DRY 0328105 _ _ _ _ _ _ _ - - _ _ DRY 06/19/05 DRY 02130 4QD6 Tables 1-2.xls Page 18 of 24 SECOR