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Page 13 of 25 Table 1 Historical Groundwater Gauging and Analytical Results Union Oil Company of California Former 76 Station No.4409/Phillips 66 Site 2469 1502 North El Dorado Street,Stockton,CA Ethyl- Total Sample TOC DTW GWE TPH-g Benzene Toluene benzene Xylenes MTBE TBA EDB 1,2-DCA DIPE ETBE TAME Ethanol Comments Well ID _ Date (ft.amsl) (ft) (ft.amsi) (pg/L) (pg/L) (pg/L) (pg/L) (pg/L) (pg/L) (pg/L) (pg/L) (pg/L) (pg/L) (pg/L) (Pg/L) (pg/L) MW-9 08/28/15 10.86 30.29 -19.43 <50 <0.50 <0.50 <0.50 <1.0 10 94 <0.50 <0.50 <0.50 <0.50 <0.50 <250 MW-9 03/3D/16 10.86 29.59 -18.73 <50 <0.50 <0.50 <0.50 <1.0 13 64 <0.50 <0.50 <0.50 <0.50 <0.50 <250 MW-9 08/29/16 10.86 29.70 -18.84 <50 <0.50 <0.50 0.63 2.0 24 270 <0.50 <0.50 <0.50 <0.50 <0.50 <250 MW-9 10/29/16 10.86 30.11 -19.25 - - - - - - - - - - - - - MW-9 03/10/17 10.86 25.81 -14.95 <50 <0.50 <0.50 <0.50 <1.0 28 <10 <0.50 <0.50 <0.50 <0.50 <0.50 <250 MW-9 08/11/17 10.86 23.48 -12.62 <50 <0.50 <0.50 <0.50 <1.0 <0.50 <10 <0.50 <0.50 <0.50 <0.50 <0.50 <250 MW-9 02/28/18 10.86 22.46 -11.60 <50 <0.50 <0.50 <0.50 <1.0 <0.50 <10 <0.50 <0.50 <0.50 <0.50 <0.50 <250 MW-9 08/31/18 10.86 21.70 -10.84 <50 <0.50 <0.50 <0.50 <1.0 <0.50 <10 <0.50 <0.50 <0.50 <0.50 <0.50 <250 MW-9 03/01/19 10.86 21.12 -10.26 <50 <0.50 <0.50 <0.50 <1.0 <0.50 <10 <0.50 <0.50 <0.50 <0.50 <0.50 <250 MW-9 09/05/19 10.86 18.27 -7.41 <5D <0.50 <0.50 <0.50 <1.0 <0.50 <10 <0.50 <D.50 <0.50 <0.50 <0.50 <250 MW-9 02/28/20 10.86 17.66 -6.79 <5D <0.50 <0.50 <0.50 0.0 <0.50 <10 <0.50 <D.50 <0.50 <0.50 <0.50 <250 MW-10 07/11/00 - 29.81 - 7,200 3.6 <2.5 110 32 <10 <500 - - <10 <10 <10 <2,500 MW-10 10/10/01 11.30 30.93 -19.63 9,200 <20 <20 94 230 <200 <250 <5.0 <5.0 <5.0 <5.0 <5.0 <2,500 MW-10 01/17/02 11.30 29.43 -18.13 5,200 38 5.4 65 16 63 <40 <2.0 3.4 <2.0 <2.0 <2.0 <1,000 MW-10 04/18/02 11.30 28.71 -17.41 5,900 59 <5.0 100 24 100 <250 <5.0 <5.0 <5.0 <5.0 <5.0 <1,2D0 MW-10 07/11/02 11.30 29.81 -18.51 7,200 3.6 <2.5 110 32 <2.0 <25 <2.5 <2.5 <5.0 <2.5 <2.5 <130 MW-10 11/14/02 11.30 32.7D -21.40 3,200 2.2 1.4 54 31 <2.0 <100 <2.0 <2.0 <2.0 <2.0 <2.0 <500 MW-10 01/30/03 11.30 31.70 -20.40 2,700 1.4 0.74 54 30 <2.0 <100 <2.0 <2.0 <2.0 <2.0 <2.0 <500 MW-1D 04/28/03 11.30 30.88 -19.58 6,200 <5.0 <5.0 100 48 40 <1,D00 <20 <20 <20 <20 <20 <5.000 MW-10 07/28/03 11.30 32.40 -21.10 6,300 <2.5 <2.5 98 26 260 <500 <10 <10 <10 <10 <10 <2,500 MW-10 10/08/03 11.30 34.08 -22.78 4,300 <5.0 <5.0 78 22 290 <1,000 <20 <20 <20 <20 <20 <5,00D MW-10 01/12/04 11.30 33.33 -22.03 2,700 <5.0 <5.0 45 15 910 <1,000 <20 <20 <20 <20 <20 <5,000 MW-10 04/26/04 11.30 31.90 -20.60 1,700 <5.0 <5.0 16 <1D 1,300 <50 <5.0 <5.0 <10 <5.D <5.0 <500 MW-1D 07/13/04 11.30 33.21 -21.91 2,100 <5.0 <5.0 <5.0 <1D 1,100 <50 <5.0 <5.0 <10 <5.0 <5.0 <500 MW-1D 10/26/04 11.30 35.20 -23.90 3,900 <13 <13 24 <25 2,700 <130 <13 <13 <25 <13 <13 <1,300 MW-10 01/12/06 11.30 34.52 -23.22 3,600 <0.50 <0.50 6.6 5.8 3,200 <130 <13 <13 <25 <13 <13 <1,300 MW-10 04/12/05 11.30 32.05 -20.75 3,500 <0.50 <0.50 6.6 7.4 2,300 <130 <13 <13 <13 <13 <13 <1,300 MW-10 07/12/05 11.30 31.16 -19.86 2,200 <0.50 <0.50 2.7 2.4 2,600 200 <0.50 <0.50 <0.50 <0.50 3.7 <50 MW-10 10/06/05 11.30 32.79 -21.49 6,800 <13 <13 <13 <13 3,300 600 <13 <13 <13 <13 <13 0,300 MW-10 01/12/06 11.30 31.65 -20.35 4,100 <0.50 <0.50 0.86 4.2 440 1,700 - <0.50 <0.50 <0.50 5.6 <250 MW-10 04/12/06 11.30 29.53 -18.23 3,800 <0.50 <0.50 <5.0 0.0 4,500 1,100 - 0.89 <0.50 <0.50 6.4 <250 MW-10 07/10/06 11.30 27.83 -16.53 11,00 <0.50 <0.50 <50 <100 7,200 7,600 - <50 <50 <50 <50 <26,000 MW-10 10/18/06 11.30 29.02 -17.72 9,200 <0.50 <0.50 <50 <100 8,100 10,000 - <12 <50 <50 <50 <6,200 MW-10 03/12/07 11.30 28.23 -16.93 5,700 <12 <12 <12 <12 8,300 7,000 - <12 <12 <12 <12 <6,200 MW-1D 05/15/07 11.30 28.01 -16.71 6,700 <50 <50 <50 <50 6,200 6,200 <50 <50 <50 <50 <50 <25,000 MW-10 OS/01/07 11.30 28.66 -17.36 7,100 <25 <25 <25 <25 7,000 6,600 <25 <25 <25 <25 <25 <12,000 MW-10 11/19/07 11.30 29.52 -18.22 4,500 <25 <25 <25 <25 7,300 5,700 <25 <25 <25 <25 <25 <12,000 MW-10 01/22/08 11.29 28.70 -17.41 4,700 <12 <12 <12 <25 6,900 7,300 <12 <12 <12 <12 <12 <6,200 MW-10 04/07/08 11.29 27.64 -16.35 5,300 a 1.2 4.5 4.4 27 7,100 6,900 <0.50 1.0 <0.50 <0.50 8.2 <250 MW-10 07/21/08 11.29 29.01 -17.72 6,600 <10 <10 <10 <20 6,300 9,600 <10 <10 <10 <10 <10 <5000 MW-10 10/20/08 11.29 30.49 -19.20 6,900 <12 <12 <12 <25 5,900 6,700 02 <12 <12 <12 <12 <6200 MW-10 01/19/09 11.29 30.84 -19.55 1,100 <10 <10 <10 <20 6,400 8,700 <10 <10 <10 <10 <10 <5,000 GHD 11193145(5)