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TABLE 2 Historical Groundwater Monitoring & Analytical Data Former Chevron Service Station No. 94054 2103 Country Club Boulevard, Stockton, California Well No. Date Notes TOC (ft-MSL) Depth to Water 18) SPH (ft) GWE (ft-NISL) TPH- DRO (pg/L) TPH- GRO e (pg/L) T (pg1L) E (pg/L) , X (pg/L) MTBE (pg/L) TEA (pg/L) TAME (pg/L) 1,2- DCA ED B (pg/L) D.O. (mg/L) Comments MW-7 02/23/95 1 40 16 20 0.00 -1480 13,000 2,700 150 310 290 MW-7 05/26/95 1.40 14.67 0.00 -13.27 24,000 3,100 1.700 670 2,000 - MW-7 08/25/95 1.40 15.44 0.00 -14.04 -- 23,000 3,800 1,400 630 1,900 - MW-7 11/30/95 1.40 16.04 0.00 -14.64 - 12,000 3,000 140 480 580 - MW-7 03/26/96 1.21 10.66 0.00 -9.45 9,900 1,700 130 220 220 - MW-7 05/16/96 1.21 10.02 0.00 -8.81 - 16,000 2,800 690 420 900 - MW-7 08/22/96 1.21 12.73 0.00 -11.52 10,000 2,800 120 250 340 - - MW-7 11/05/96 1.21 13.70 0.00 -12.49 10,000 2,700 84 250 380 <125 - MW-7 02/25/97 1.21 7.95 0.00 -6.74 22,000 4,000 830 680 950 790 - - MW-7 05/20/97 1.21 9.08 0.00 -7.87 - 15,000 2,700 200 470 430 <125 - - MW-7 08/26/97 1.21 11.53 0.00 -10.32 14,000 680 43 850 110 160 - - MW-7 11/05/97 1.21 12.35 0.00 -11.14 - 9,900 1,900 65 84 120 590 <1,000 <20 MW-7 02/10/98 1.21 5.15 0.00 -3.94 6,900 1,700 270 220 420 <25 - - - MW-7 05/20/98 0.72 5.60 0.00 -4.88 - 2,000 370 91 18 16 <2.5 <333 <6.7 - MW-7 08/12/98 0.72 7.91 0.00 -7.19 - <1000 260 <10 <10 <10 <50 - - MW-7 12/01/98 0.72 8.85 0.00 -8.13 - 1,500 350 6 <5.0 8.2 39 - - MW-7 02/02/99 0.72 7.21 0.00 -6.49 - <50 <0.5 <0.5 <0.5 <0.5 <2.5 - MW-7 05/20/99 0.72 6.90 0.00 -6.18 - 360 47 <0.5 <0.5 3.3 <2.5 - MW-7 09/01/99 0.72 9.44 aoo -8.72 - 572 25.2 1.1 2.44 1.5 20.9 - - MW-7 12/07/99 0.72 10.11 0.00 -9.39 - 548 31.9 1.7 <1.0 2.1 21 - - - MW-7 02/15/00 0.72 5.55 0.00 -4.83 - 1,120 178 6.6 2.29 8.5 71.1 - - MW-7 05/31/00 0.72 6.77 0.00 -6.05 - 1002 26 1.7 1.3 3.9 3.9 - - MW-7 08/25/00 0.72 9.08 0.00 -8.36 - 962 7.2 <0.50 <0.50 0.88 4.0 - - - MW-7 11/21/00 0.72 9.10 0.00 -8.38 - - - - - - - - - - MW-7 12/02/00 0.72 10.02 0.00 -9.30 - • <50 1.4 <0.50 <0.50 <0.50 <2.5 - - MW-7 02/14/01 0.72 9.05 0.00 -8.33 - 21,203 464 5.06 <5,00 <5.00 <25.0 - - MW-7 05/16/01 0.72 7.16 0.00 -6.44 70.23 2.93 <0.500 <0.500 <0.500 <2.50 - - MW-7 08/21/01 0.72 10.08 0.00 -9.36 <50 <0.50 <0.50 <0.50 <0.50 <2.5 - - MW-7 11/20/01 0.72 11.1 0.00 -10.38 200 4.6 0.51 <0.50 <1.5 <2.5 - - MW-7 02/22102 0.72 - - - - - - - - - - - MW-7 05/24/02 0.72 7.70 0.00 -6.98 150 1.2 <0.50 <0.50 <1.5 <2.5 - - MW-7 08/28/02 0.72 10.47 0.00 -9.75 - 54 <0.5 <0.5 <0.5 3 <2 - - - MW-7 11/14/02 0.63 11.24 0.00 -10.61 - 130 0.6 1 0.8 1 <2 - - - MW-7 02/20/03 0.63 8.14 0.00 -7.51 - 170 0.9 <0.5 0.7 <0.5 <2 - - - - MW-7 05/22/03 0.63 8.06 0.00 -7.43 - 280 <0.5 <0.5 <0.5 <0.5 <2 - - - MW-7 08/21/03 0.63 10.41 0.00 -9.78 - 150 1 <0.5 <0.5 <0.5 <2 - - - MW-7 11/24/03 0.63 10.79 0.00 -10.16 820 5 0.7 5 2 2 - - <2 <2 MW-7 02/16/04 0.63 7.96 0.00 -7.33 - 400 9 <0.5 0.8 1 <2 - <2 <2 MW-7 05/17/04 0.63 8.45 0.00 -7.82 - 350 <0.5 <0.5 <0.5 <0.5 <2 - MW-7 08/23/04 0.63 10.69 0.00 -10.06 - 310 12 0.6 0.6 0.6 3 - MW-7 11/15/04 0.63 10.30 0.00 -9.67 - 570 7 <0.5 <0.5 0.7 <2 - - - - MW-7 02/14/05 0.63 9.43 0.00 -8.80 430 39 0.6 <0.5 1 4 - - - - MW-7 05/16/05 0.63 7.71 0.00 -7.68 280 <0.5 <0.5 <0.5 <0.5 <2 - - - MW-7 08/15/05 0.63 9.64 0.00 -9.01 310 <0.5 <0.5 <0.5 <0.5 <2 - - MW-7 11/14/05 0.63 10.65 0.00 -10.02 370 <0.5 <0.5 <0.5 <0.5 <2 - - MW-7 02/13/06 0.63 7.22 0.00 -6.59 - 140 <0.5 <0.5 <0.5 <0.5 <2 - - MW-7 05/15/06 0.63 6.38 0.00 -5.75 <50 <0.5 <0.5 <0.5 <0.5 <2 - - MW-7 08/14/06 0.63 8.85 0.00 -8.22 <50 <0.5 <0.5 <0.5 <0.5 <2 - - 1 7 MW-7 11/13/06 0.63 9.71 0.00 -9.08 <50 0.6 <0.5 <0.5 <0.5 <2 - - - - 1 5 MW-7 02/12/07 0.63 8.10 0.00 -7.47 51 <0.5 <0.5 <0.5 <0.5 3 - - - 11 MW-7 05/14/07 0.63 8.27 0.00 -7.64 77 <0.5 <0.5 <0.5 <0.5 <2 - - 1 3 94054 GW Tables.xis Page 15 of 28 Stan tec