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TABLE 2 Historical Groundwater Monitoring & Analytical Data ARCO Service Station No. 2130 7906 N. EL Dorado Street, Stockton, CA TOC DTW SPH GWE GRO B T E X WOE TBA DIPE ETRE TAME Ethanol 1 ,2-DCA EDB rMS-3A PINP &MSL D.O. Commeols ( ) (reef) (hef) Itt-MSL] 1491L) (491L) (491L) (491L) 14gIL) (401L) V191L) (491L) (491L) 149/L) (491L) (49/L) 1491L)12M 1/05 P - 43.35 0.00 - 360 38 9.4 16 36 81 {2] <40 0 .0 <1 .0 <1.0 <200 UJ 2.2 - 4.00 - 03/19/06 P 40.05 0.00 - 150 10 0.0 2.6 1.6 8512] <40 <1 .0 <1 .0 <1.0 <600 1 .2 - 4.40 - 06/13/06 P 39.79 0.00 - 160 2.5 0.72 0.82 6.9 t00 32 <0.50 <0.50 <0.50 <300 0.86 - 4.30 - 09/12/06 P 45.25 0.00 - 340 26 4.1 13 3.5 100 <20 40.50 <0.50 <0.50 <300 <0.50 - 4.50 - 12MV86 P 42.60 OAO 1 400 40.50 40.50 0.71 <0.50 <0.50 420 <0.50 <0.50 40.50 4300 0.75 OM MS-3B 12/19/02 - - 41 .84 0.00 - 1 ,200 26 1 .4 27 <0.50 7.1121 <200 <0.50 <0.50 <0.50 - - - - 03106/03 P 39.23 0.00 - 11100 6.8 3.5 7.1 5.6 19(2] <20 <0.50 <0,50 <0.50 <100 1 .4 <0.50 2.00 06/11/03 NP 38.49 0.00 - <50 <0.50 <0.50 <0.50 40.50 9.4 [2)J <20 <1 .0 <1 .0 <1.0 <100 - - 4.19 - 09/24/03 NP 42.53 0.00 - <50 <0.50 <0.50 <0.50 <0.50 0.65[2] <20 0 .0 <1 .0 <1.0 <100 - - - - 12/10/03 P 41 .86 0.00 - 190 26 30 5.9 37 0.63[2) <20 0 .0 <1 .0 <1.0 <100 1 .4 - - - 03/0994 39.28 0.00 - 11200 35 0.52 7.5 <0.50 3.2[2] <20 <1 .0 <1 .0 <1.0 <100 <0.50 - - - 06/24/04 NP 43.21 0.00 - 120 <2.5 <2.5 <2.5 42.5 <2.5121 <100 <2.5 <2.5 <2.5 <500 120 - 1 .92 WATER 09/20/04 P 48.02 0.00 - <50 25 42.5 <2.5 <2.5 <2.5[2) <100 <5.0 <5.0 <5.0 <500 <2.5 - 0.80 - 12/20104 - _ _ _ _ _ _ _ - _ _ _ _ _ _ _ NS 03/26/05 P 42.50 0.00 - <50 1 .8 <0.50 <0.50 0.64 33[2] <20 <1 .0 <1 .0 <1 .0 3,500 <0.50 - 5.00 - 06120/05 P 42.07 0.00 - 62 4.2 1 .1 1 .6 1 .5 36M <20 <0.50 <0.50 <0.50 <100 <0.50 - 1 .90 WATER 09/11/05 P 46.55 0,00 - 410J 511 37J 22 J 59 J 38 rAJ <20 UJ <0.50 UJ <0.50 UJ <0.50 UJ <100 UJ <0.50 UJ - 3.00 - 12/11/05 P 43.40 0.00 - 75 7.9 7.2 3.7 11 23[21 <20 <0.50 <0.50 <0.50 <100 UJ <0.50 - 3.40 - oaflsO6 P 40.09 0.00 - 97 20 0.73 7.9 4.3 27121 <20 40.50 <0.50 <0.50 <300 <0.50 - 2.40 - 06/14/06 P 39.83 0.00 - 190 11 <0.50 4.0 0.62 29 <20 <0.50 <0.50 <0.50 <300 <0.50 - 3.00 - 09/12/06 P 45.25 0.00 - 240 50 7.6 26 9.8 23 <20 <050 <0.50 <0.50 <300 <0.50 - 2.40 12/14106 P 42.61 0.00 100 40.50 <0.50 <0.50 40.50 40.50 420 40.59 mJiO 40.50 4300 40.50 0.59 MW-1 01/07/92 - 14.58 61 .48 0.00 46.90 18,000 1 ,600 610 140 8.5 - - - - - - - - - 02/24/92 60.76 0.00 46.18 - - - - - - - - - - - - - - - 03/31/92 - 60.56 0.00 -45.98 - - - - - - - - - - - - - - - 04/21/92 60.91 0.00 -46.33 51200 1 ,400 360 53 260 - - - - - - - - - - 05/11/92 - 61 .57 0.00 -46,99 - - - - - - - - - - - - - - - 0623192 - 61 .68 0.00 47.10 - - - - - - - - - - - - - - - 07/0892 62.84 0.00 -48.26 6,500 11900 320 89 230 - - - - - - - - - - 08110/92 63.74 0.00 49.16 - - - - - - - - - - - 09/1592 - 64.37 0.00 49.79 - - - - - - - - - - - - - - - 10/0692 - 64.52 0.00 -49.94 11 ,000 21500 600 210 470 - - - - - - - - - - II/t1/92 63.83 0.00 49.25 - - - - - - - - - - - - - - - 12/04/92 63.10 0.00 48.52 - - - - - - - - - - - - - - - 0120/93 - 61 .83 0.00 47.25 1 ,600 260 100 10 34 - - - - - - - - - - 03/2293 59.95 0.00 -45.37 - - - - - - - - - - - - - - - 04/06/93 59.47 0.00 44.89 11500 250 64 30 76 - - - - - - - - - 07/3093 60.19 0.00 -45.61 21100 390 130 38 79 - - - - - - - - - - 11/29/93 59.29 0.00 44.71 11200 230 12 11 16 - - - - - - - - - - 03123194 54.33 0.00 39.75 1 11900 120 8.2 25 7.5 02130 4006 Tables 1-2.xls Page 3 of 24 SECOR