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TABLE 2 Historical Groundwater Monitoring 6 Analytical Data ARCO Service Station No. 2130 7906 N. EL Dorado Street, Stockton, CA Well Na Dam P/NP TOC DTw BPH OWE ORO B T E X MTBE TBA DIPS ETBE TAME Ethanol 1 ,2ACA EDB D.O-. Comments (B-MBL) (fee!) (Poet) (01,111111L) (1190-) (pg/L) (Pg1L) (100-) (RAIL) (40/L) WL) IP9E-) (p0&) (pg/L) (p91L) WIL) (P91L). VW-10 06124/04 NP - 44.02 0.00 - 150 42.5 <2.5 <2.5 <2.5 28[2] 4100 <2.5 <2.5 25 <500 290 - - WATER 0920104 P 48.15 0.00 - 640 84 76 37 140 <2.5[2] <100 <5.0 <5.0 <5.0 <500 <25 - 0.80 - 12/21/04 P 44.57 0.00 - 34,000 2,600 J 41400 J 2,300 J 71000 J <60 [2]UJ <2,000 UJ <100W <100 UJ <100 UJ <10,000 UJ <50 UJ - 0.30 WATER 03127/05 P 41 .42 0.00 - 124000 2,600 11100 1 ,500 2,600 <50rA <21000 <100 <100 <100 <102000 <50 - 0.60 - 06/19/05 P 41 .72 0.00 - 10,000J 700J 1 ,100 700J 1 ,700 <12rA <500 <12 <12 <12 <21500 <12 - 0.50 - 09111/05 P 46.43 0.00 - 41000 300 260 470 520 <12M <500 <12 <12 <12 <2,500 <12 - 0.40 12/11/05 P 43.40 0.00 - 250000 11900 11500 1900, 4,600 <26[2] <11000 <25 <25 <25 <51000 <25 - 0.40 - : 03/19/06 P 40.09 0.00 - 25,000 J 2,400 J 11700 J 1 ,900 J 31800 J <25 [2]UJ 01000W <25 UJ <25 W <25 UJ <15,000 UJ <25 UJ - 0.40 - _ 06/13/06 P 39.74 0.00 - 81400 960 170 850 980 <25 <14000 <25 <25 <25 <160000 <25 - 0.60 - 09/12/06 P 16.00 45.00 0.00 -29.00 21 ,000 770 1 ,600 1 ,100 3,100 <25 <1 ,000 <25 <25 <25 <15,000 <25 - 3.60 - 12(14/06 P 42.45 0.00 46.45 26,000 11300 19400 11600 4,100 410 400 410 <10 410 6,W0 17 1.67 VW-11 12/19/02 - - 41 .28 0.00 - 55 5. 1 <0.50 0.64 <0.50 0.98(2] <5.0 <0.50 <0.50 <0.50 - - - - - 03/06/03 P 39.04 0.00 - 110 1 .2 <0.50 0.51 1 .8 <0.50[2) <20 <0,50 <0.50 <0.50 <100 2.7 <0.50 1 .80 - 06/11/03 P 38.57 0.00 - 450 40.50 40.50 40.50 40.50 40.50[2] 420 47 .0 41 .0 41 .0 4100 - - 3.96 - 0924/03 P 42.61 0.00 - 74 <0.50 <0.50 <0.50 <0.50 8.0[2] <20 <1 .0 <1 .0 <1 .0 <100 - - - - 12110/03 P 41 .32 0.00 - 180 1 .3 <0.50 2.1 1.3 12[2] 34 41 .0 <1 .0 <1.0 <100 2.3 - - 03/08/04 P 39. 11 0.00 - 460 0.55 J <0.50 1 .6 J 9.0 J 20 [2]J <20 <1 .0 <1 .0 <1.0 <100 1 .3 J - 2.51 - 0623/04 P 44.00 0.00 - <50 <0.50 <0.50 <0.50 <0.50 <0.50[2] <20 <0.50 <0.50 <0.50 <100 40.50 - 1 .41 0920104 P 48.16 0.00 - 420 27 <0.50 32 13 0.63[2] <20 <1 .0 <1 .0 <1 .0 <100 5.3 - 1 .00 - 1220104 P 45.27 0.00 - 12000 J 48 J <0.50 120 J 55 0.69[2] <20 <1 .0 <1 .0 <1.0 <100 4.5 - 1 .99 - 0328105 P 42.25 0.00 - <50 0.75 <0.50 1 .6 <0.50 <0.50[2] <20 <1 .0 <7.0 <1.0 <100 <050 - 3.00 - 06/20/05 P 42.58 0.00 - <50 2.4 J <0.50 4.3 J <Ua <0.50(2] <20 <0.50 <0.50 <0.50 <100 <0.50 - 1 .90 WATER 09/12/05 P 47.05 0.00 - 450 36 <0.50 43 24 <0.50[2] <20 <0.50 <0,50 <0.50 <100 0.64 - 1 .80 WATER 12111/05 P 43.67 0.00 - 41500 40 <25 58 45 <26M <11000 <25 <25 25 <51000 <25 - 1 .99 - 03/19/06 P 40.55 0.00 - <50 UJ 1 .6 J <0.50 UJ 2.4 J 0.72 J <0.50 [2]UJ <20 UJ <0.50 UJ <0.50 UJ <0.50 W <300 UJ <0.50 UJ - 2.50 - 06/14/06 P 40.42 0.00 - <50 1 .9 <0.50 2.6 0.74 <0.50 <20 <0.50 <0.50 <0.50 <300 <0.50 - 1 .30 - 09/14/06 P 16.59 45.81 0.00 -29.22 700 48 <1.0 82 42 <1 .0 <40 <1 .0 41 .0 <1 .0 <600 <1 .0 - 0.90 12/13106 P 43.17 am -2656 600 16 6.50 51 10 6.50 420 6.50 40.50 6150 4300 0.72 1.87 VW-12 05/20/97 - - 43.78 0.00 - 11500 150 1 .0 58 <1 .0' <6.0' - - - - - - - - - 09/01/98 40.65 0.00 _ _ _ 12/02/98 - 37.66 0.00 0321/99 - 37.57 0.00 - - - - - - - - - - - - - - - - 06/04/99 35.36 0.00 _ _ _ 1 W I 09/02/99 - 39.93 0.00 - - - - - - - - - - - - - - - - 1129/99 38.09 0.00 - - - - - - - - - - - - - - - - 03/16/00 - 34.23 0.00 - - - - - - - - - - - - - - - 0626/00 36.68 0.00 - - - - - - - - - - - - - - - - 0928/00 40.94 0.00 - - - - - - - - - - - - - - - 12/19/02 40.50 0.00 - <200 120 <0.50 <0.50 <0.50 2.6[2] <200 <0.50 <0.50 <0.50 - - - - - OV06/03 P 38.27 0.00 440 R <0.50 <0.50 <0.50 <0.50 098[2] <20 <0.50 <0.50 <0.50 <100 310 <0.50 02130 4Q06 Tables 1-2xls Page 21 of 24 SECOR