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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 IR) SPH (ft) OWE (ft-MSL) TPH- (pg/L) 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 EDB (pg/L) D.O. (mg/ L) Comments MW-8 08/14/06 1 02 920 000 -8 18 1,000 10 <05 0.6 <0.5 <2 1.2 MW-8 11/13/06 102 10.03 0.00 -901 850 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 co.5 0.6 MW-8 02/11/08 1.02 7.18 0.03 -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 8 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 1,200 5 0.7 10 1 0.6 - - - 1.5 MW-8 08/02111 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 08/09/12 361 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 <0.5 - - -- 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 03/18/14 361 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 09/27/15 361 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-8 03/27/17 3.61 6.10 0.00 -2.49 890 21 <0.5 <0.5 <0.5 <2 - <2 <2 1.3 MW-8 09125/17 3.61 10.29 0.00 -6.68 - 640 31 <0.6 <0.5 <0.6 <2 - <2 <2 - 1.6 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 16.51 000 -14.84 3,100 1,100 <10 <10 <10 - - MW-9 03/26/96 1.68 11.04 0.00 -9.36 <50 2.0 <0.5 <0.5 <0.5 - - - MW-9 05/16/96 1.68 10.30 000 -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 - MW-9 11/05/96 168 -- - -- - - -- - - - - - - MW-9 02/25/97 1 68 9.36 0.00 -7.68 710 34 <2.0 <2.0 <2_0 45 - - MW-9 05/20/97 1.68 9.57 0.00 -7.89 690 14 3.5 1.6 0.7 39 - - - - MW-9 05/20/97 168 9.57 0.00 -7.89 - - -- -- -- <2.0 - - MW-9 08/26/97 1.68 1203. 000 -10.35 15,000 740 76 870 130 170 -- -- - MW-9 11/05/97 1.68 12.95 0.00 -11.27 120 <0.5 <0.5 <0.5 <0.5 13 <100 <2.0 - - MW-9 02/10/98 1.68 4.43 0.00 -2.75 <50 <0.5 <0.5 <0.5 <0.5 <2.5 -- - - MW-9 05/20/98 1.20 5.93 0.00 -4.73 <50 <0.5 <0.5 <0.5 <0.5 <2.5 <100 <2.0 - - MW-9 08/12/98 1.20 8.38 0.00 -7.18 <50 <0.5 <0.5 <0.5 <0.5 <5.0 -- - - - MW-9 12/01/98 1.20 9.19 0.00 -7.99 - <50 <0.5 <0,5 <0.5 <0.5 <2.5 - - MW-9 02/02/99 1.20 7.81 0.00 -6.61 <50 <0.5 <0.5 <0.5 <0.5 <2.5 - MW-9 05/20/99 1.20 7.32 0.00 -6.12 <50 <0.5 <0.5 <0.5 <0.5 <2.5 MW-9 09/01/99 1.20 8.86 0.00 -7.66 - <50 <0.5 <0.5 <0.5 <0.5 <5.0 MW-9 12/07/99 1.20 9.96 0.00 -8.76 - <50 <0.5 <0.5 <0.5 <0.5 <5.0 - MW-9 02/15/00 1.20 5.95 0.00 -4.75 - <50 <0.5 <0.5 <0.5 <05 <2.5 MW-9 05/31/00 1.20 7.15 0.00 -5.95 <50 <0.50 <0.50 <0.50 <050 <2.5 - - 94054 GW Tables.xls Page 18 of 29 Stan tec