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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 TOG (ft-MSL) Depth to Water (R) SPH (ft) GWE (ft-MSL) TPH- DRO TPH- GRO s (pg/L) T (pg/L) E (pg/L) X (pg/L) MTBE (pg/L) TBA (pg/L) TAME (pg/L) 1,2- DCA EDB (pg/L) D.O. (mg/L) Comments MW-2 02/16/04 056 793 0.00 -737 510 21 7 14 73 <2 2.2 MW-2 05/17/04 0.56 8.35 0.00 -7.79 360 33 3 5 24 <2 1.9 MW-2 08/23/04 0.56 10.60 0.00 -10.04 1,600 110 10 25 70 2 2.8 MW-2 11/15/04 INA 0.56 - - - -- - - - - - - - Locked fence MW-2 02/14/05 0.56 9.64 0.00 -9.08 420 21 5 12 49 <2 - - 2.1 MW-2 05/16/05 0.56 7.58 0.00 -702 110 2 <0.5 0.6 0.7 <2 - - - - 1.7 MW-2 08/15/05 0.56 9.92 0.00 -939 570 24 2 2 7 <2 - - - - 1.5 MW-2 11/14/05 0,56 10.55 0.00 -999 380 18 0.7 0.6 3 <2 - - - - 1.9 MW-2 02/13/06 0.56 7.12 0.00 -6.56 170 2 <0.5 1 2 <2 - - - - 1.6 MW-2 05/15/06 0.56 8.15 0.00 -559 810 32 4 17 53 <2 - - - - 1.8 MW-2 08/14/06 0.56 8.75 0.00 -819 710 14 1 4 10 <2 - - - - 2.1 MW-2 11/13/06 0.56 9.57 0.00 -9.01 1,700 66 5 25 56 <2 - - - - 1.9 MW-2 02/12/07 0.56 7.93 0.00 -7.37 950 32 1 9 13 0.6 - - - 1.8 MW-2 05/14/07 0.56 8.11 0.00 -7.55 1,100 24 1 8 12 <2 -- - - - 0.5 MW-2 08/13/07 0.56 10.11 0.00 -9.55 280 11 <0.5 <0.5 <0.5 3 - - - - 0.9 MW-2 11/12/07 0.56 10.57 0.00 -10.01 2,900 270 10 32 81 3 - - - - 1.2 MW-2 02/11/08 0.56 6.63 0.00 -6.07 <50 1 <0.5 <0.5 <0.5 <2 - - - - 1.4 MW-2 05/12/08 0.56 7.93 0.00 -7.37 950 50 5 23 56 2 - - - - 1.2 MW-2 08/11/08 0.56 10.10 0.00 -9.54 6.000 480 36 200 380 5 - - - - 1.4 MW-2 11/10/08 0.56 10_41 0.00 -9.85 2,400 290 5 <5 <5 <5 - <5 <5 - 1.1 MW-2 02/09/09 INA 0.56 - - -- - - - - - - - - - - Unable to locate MW-2 05/11/09 INA 0.56 - - - - - - - - - - Unable to locate MW-2 11/23/09 INA 0.56 - - - - - - - - - - Unable to locate MW-2 05/17/10 INA 0.56 - - - - - - - - - - - - - Unable to locate MW-2 11/03/10 3.01 10.15 000 -7_14 1,200 69 1 0.7 2 1 - - - - 1.3 MW-2 01/05/11 3.01 6.88 000 -3.87 1,800 180 3 21 11 3 - - - - 1.7 MW-2 08/02/11 3.01 8.53 0.00 -5.52 51 <0.5 <0.5 <0.5 <0.5 <0.5 - - - - 1.0 MW-2 02/03/12 3.01 8.82 000 -5.81 <50 1 <0.5 <0.5 <0.5 <0.5 - - - - 1.1 MW-2 08109/12 3.01 10.02 000 -7.01 3,000 250 7 <5 6 <5 - - - - 1.2 MW-2 03/14/13 3.01 7.62 000 -4.61 82 <0.5 <0.5 <0.5 <0.5 <0.5 - - - - 1.1 MW-2 09/25/13 3.01 10.42 000 -7.41 4,200 390 19 93 100 4 - - 0.9 MW-2 03/18/14 3.01 8.91 000 -5.90 140 2 1 <0.5 <0.5 <0.5 - - - 0.8 MW-2 09/29/14 3.01 11.81 000 -8.60 4,900 280 26 7 36 4 - - - 1.1 MW-2 03/25/15 .3.01 8.56 000 -5.56 2,500 100 9 2 14 2 - - - - 2.2 MW-2 09/27/15 3.01 12.25 0.00 -9.24 2,600 180 4 <0.5 3 <2 <2 <2 - 2.0 MW-2 03/28/16 3.01 7.75 0.00 -4.74 150 2 <05 <0.5 <0.5 <2 <2 <2 - 1.2 MW-2 09/26/16 3.01 11.90 0.00 -8.89 1,800 110 05 0.7 <0.5 <2 <2 <2 - 1.5 MW-2 03/27/17 3.01 5.20 000 -2.19 120 5 <0.5 <0.5 <0.5 <2 <2 <2 - 1.2 MW-2 09/26/17 3.01 9.53 0.00 -6.82 - 620 12 <0.5 <0.6 <0.5 <2 - <2 <2 - 1.4 MW-28 11/10/06 3.91 11.68 0.00 -7.77 --- --- --- - - -- Well development performed MW-28 11/13/06 3.91 10.72 0.00 -6.81 14,000 2,500 47 16 49 <5 - 1.9 MW-2B 02/12/07 3.91 9.02 0.00 -5.11 12,000 2,900 44 13 43 <5 - 2.1 MW-2I3 05/14/07 3.91 9.15 0.00 -5.24 9,900 3,500 50 14 46 <3 - 1.1 MW-2B 08/13/07 3.91 11.29 0.00 -7.38 9,500 2,700 24 11 25 <3 - 0.8 MW-2B 11/12/07 3.91 11.62 0.00 -7.71 7,800 2,200 15 6 9 <3 - - 1.1 MW-213 02/11/08 3.91 7.50 0.00 -3.59 5,900 1,800 17 3 15 <2 - 0.9 MW-2B 05/12/08 3.91 8.97 0.03 -5.06 8,500 2,800 46 7 37 <3 - 1.0 MW-2B 08/11/08 3.91 11.30 0.00 -7.39 7,800 2,000 27 5 17 <2 -- -- - 1.7 MW-2I3 11/10/08 3.91 11.49 0.00 -7.58 6,500 1,700 <25 <25 <25 <25 <25 <25 - 1.3 MW-2I3 02/09/09 3.91 10.15 0.00 -6.24 1,600 340 4 <05 6 <05 <05 <0.5 - 0.6 MW-29 05/11/09 3.91 9.39 0.00 -5.48 _ 4,400 960 18 3 15 <1 <1 <1 - 0.3 94054 GW TablesAls Page 5 of 29 Stan tec