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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 (6) SPH (ft) GWE (ft-MSL) TPH- DRO TPH- GRO B (pg/L) T (pg/L) E (pg/L) X (pg/L) MTBE (pg/L) TBA (pg/L) TAME (pg/L) 1,2- DCA (pg/L) EDB (pg/L) D.O. (mg/L) Comments MW-8 02/22/02 1 74 901 000 -727 4,200 180 12 82 53 <10 1 6 MW-8 05/24/02 1.74 8.69 0.00 -6.95 2.800 120 42 35 16 <10 2.3 MW-8 08/28/02 1.74 11.45 0.00 -9.71 620 10 <05 2 <0.5 <2 - 2.6 MW-8 11/14/02 1.63 12.46 0.00 -10.83 2.100 84 5 9 6 <2 - 14.3 MW-8 02/20/03 1.63 9.12 0.00 -7.49 2,700 70 4 35 15 <2 - 0.8 MW-8 05/22/03 1.63 9.05 0.00 -7.42 1,800 50 2 22 8 <2 - MW-8 08/21/03 1.63 11.03 0.130 -9.40 560 4 <0.5 1 <0.5 <2 - <2 <2 1.7 MW-8 11/24/03 - 9.30 0.00 - - 620 9 1 6 2 <2 - <2 <2 2.8 TOC altered; unable to determine OWE MW-8 02/16/04 1.02 8.35 0.00 -7.33 2,600 21 1 14 2 <2 - -- 1.7 MW-8 05/17/04 1.02 8.80 0.00 -7.78 1,500 11 06 4 0.8 <2 2,4 MW-8 08/23/04 1.02 10.95 0.00 -9.93 790 3 <05 2 0.6 <2 - 2.6 MW-8 11/15/04 INA 1.02 - - - - -- - - - -- - Locked fence MW-8 02/14/05 1.02 11.16 0.00 -10.14 2,100 58 8 55 39 <2 1.9 MW-8 05/16/05 1.02 8.15 0.00 -7.13 2,600 180 22 12 57 <2 - - - 1.7 MW-8 08/15/05 1.02 9.93 0.00 -8.91 730 10 <0.5 <0.5 <0.5 <2 - - - 1.4 MW-8 11/14/05 1.02 10.97 0.00 -9.95 420 1 <0.5 <0.5 <0.5 <2 - - -- 1.6 MW-8 02/13/06 1.02 7.68 0.00 -6.66 700 1 <0.5 1 <0.5 <2 - - - - 1.3 MW-8 05/15/06 1.02 6.82 0.00 -5.80 1,700 170 4 8 8 <2 - - - - 1.5 MW-8 08/14/00 1.02 9.20 0.00 -8.18 1,000 10 <0.5 0.6 <0.5 <2 - - - 1.2 MW-8 11/13/06 1.02 10.03 0.00 -9.01 850 3 <0.5 3 0.7 <2 - - - - 1.5 MW-8 02/12/07 1.02 8.39 0.00 -7.37 600 2 0.6 1 0.8 <0.5 - - - - 1.7 MW-8 05/14/07 1.02 8.64 0.00 -7.62 1,100 7 0.7 8 2 <2 - - - - 1.8 MW-8 08/13/07 1.02 10.58 0.00 -9.56 690 2 <0.5 4 0.8 <0.5 - - - - 0.9 MW-8 11/12/07 1.02 10.97 0.00 -9.95 160 <0.5 <0.5 <0.5 <0.5 <0.5 - - - - 0.6 MW-8 02/11/08 1.02 7.18 0.00 -6.16 550 1 <0.5 <0.5 <0.5 <2 - - - - 1.3 MW-8 05/12/08 1.02 8.47 0.00 -7.45 1,000 <0.5 1 <0.5 1 <0.5 - - - - 0.9 MW-8 08/11/08 1.02 10.57 0.00 -9.55 1,600 10 1 23 5 <2 - - - - 1.0 MW-8 11/10/08 3.57 10.88 0.00 -7.31 - 91 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 - 0.9 MW-8 02/09/09 3.57 11.59 0.00 -8.02 520 0.8 <0.5 <0.5 <0.5 <0.5 - <0.5 <0.5 - 0.7 MW-8 05/11/09 3.57 8.91 0.00 -5.34 1,400 a 1 15 3 <0.5 - <0.5 <0.5 - 0,9 MW-8 11/23/09 3.57 11.17 0.00 -7.60 93 <0.5 <0.5 <0.5 <0.5 0.5 - <0.5 <0.5 - 0.7 MW-8 05/17/10 3.57 7.88 0.00 -4.31 1,400 33 6 1 10 1 - <0.5 <0.5 - 1.5 MW-8 11/03/10 3.61 10.71 0.00 -7.10 1.000 2 <0. 5 4 0.7 0.7 - - - - 0.9 MW-8 01/05/11 3.61 7.60 0.00 -3.99 1200, 5 0.7 10 1 0.6 - - - - 1.5 MW-8 08/02/11 3.61 9.08 0.00 -5.47 - 1,100 92 2 <0.5 2 2 - - - - 0.7 MW-8 02/03/12 3.61 9.33 0.00 -5.72 - 440 <0.5 <0.5 <0.5 <0.5 0.8 - - - - 1.3 MW-8 08/09/12 3.61 10.44 0.00 -6.83 - 1,700 1 <0.5 2 <0.5 <0.5 - - - - 1.1 MW-8 03/14/13 3.61 8.26 0.00 -4.65 - 750 1 <0.5 <0.5 0.9 <15 - - - - - MW-8 09/25/13 3.61 10.90 0.00 -7.29 - 580 0.7 <0.5 1 <0.5 <0.5 - - - - 1.0 MW-8 03/18/14 3.61 8.85 0.00 -5.24 - 160 <0.5 <0.5 <0.5 <0,5 <0.5 - - - - 1.0 MW-8 09/29/14 3.61 12.11 0.00 -8.50 - 300 <0.5 <0.5 <0.5 <0.5 <0.5 - - - - 1.4 MW-8 03/25/15 3.61 9.07 0.00 -5.46 120 <0.5 <0.5 <0.5 <0.5 <0.5 - - - - 1.6 MW-8 09/27/15 3.61 12.69 0.00 -9.08 100 <0.5 <0.5 <0.5 <0.5 <2 - <2 <2 - 2.3 MW-8 03/28/16 3.61 8.23 0.00 -4.62 260 <0.5 <0.5 <0.5 <0.5 <2 - <2 <2 - 1.1 MW-8 09/26/16 3.61 12.38 0.00 -8.77 150 <0.5 <0.5 <0.5 <0.5 <2 - <2 <2 - 1.3 MW-9 05/26/95 1.67 14,96 0.00 -13.29 180 16 <0.5 1.3 0.5 - - - - - MW-9 08/25/95 1.67 15.84 0.00 -14.17 2,100 780 25 65 35 - - - - MW-9 11/30/95 1.67 16.51 0.00 -14.84 - 3,100 1,100 <10 <10 <10 - - - - MW-9 03/26/96 1.68 11.04 0.00 -9.36 - <50 20 <0.5 <0.5 <0.5 - - - - - MW-9 05/16/96 1.68 10.30 0.00 -8.62 - 770 32 <1.2 1.5 <1.2 -- - - - MW-9 08/22/96 1.68 13.18 0.00 -11.50 - <50 24 <0.5 <0.5 <0.5 -- - - - 94054 GW Tables xls Page 17 of 28 Stantec