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Page 15 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) (R) (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-11 01/22/08 12.39 30.30 -17.91 <50 <0.50 <0.50 <0.50 0.0 3.3 <10 <0.50 16 <0.50 <0.50 <0.50 320 VW-11 04/07/08 12.39 29.32 -16.93 <50 <0.50 <0.50 <0.50 0.0 <0.50 <10 <0.50 14 <0.50 <0.50 <0.50 <250 MW-11 07/21/08 12.39 30.72 -18.33 <50 <0.50 <0.50 <0.50 0.0 <0.50 210 <0.50 13 <0.50 <0.50 <0.50 <250 MW-11 10/20/08 12.39 32.25 -19.86 <50 <0.50 <0.50 <0.50 0.0 <0.50 <10 <0.50 16 <0.50 <0.50 <0.50 <250 MW-11 01/19/09 12.39 32.63 -20.24 <50 <0.50 <0.50 <0.50 0.0 1.4 <10 <0.50 16 <0.50 <0.50 <0.50 <250 MW-11 04/20/09 12.39 32.00 -19.61 <50 0.86 1.2 <0.50 1.1 <0.50 <10 <0.50 17 <0.50 <0.50 <0.50 <250 MW-11 07/20/09 12.39 33.00 -20.61 <50 <0.50 <0.50 <0.50 0.0 <0.50 <10 <0.50 13 <0.50 <0.50 <0.50 <250 MW-11 01/04/10 12.39 33.68 -21.29 <50 <0.50 <0.50 <0.50 0.0 <0.50 <10 <0.50 15 <0.50 <0.50 <0.50 <250 MW-11 07/19/10 12.39 30.94 -18.55 - - - - - - - - - - _ _ - MW-11 01/05/11 12.39 30.87 -18.48 <50 <0.50 <0.50 <0.50 0.0 <0.50 <10 <0.50 10 <0.50 <0.50 <0.50 <250 MW-11 08/02/11 12.39 - - - - - - - - - - - _ _ - _ MW-11 03/27/12 12.39 - - - - - - - - - - - _ _ - _ MW-11 09/04/12 12.39 - - - - - - - - - - _ _ _ - _ MW-11 02/25/13 12.39 - - - - - - - - - - _ _ _ _ _ MW-11 08/13/13 12.39 - - - - - - - - - - - - - _ _ MW-11 02/07/14 12.39 - - - - - - - - - - - - - _ _ MW-11 09/24/14 12.39 - - - - - - - - - _ _ _ _ _ - MW-11 03/18/15 12.39 - - - - - - - - - - - _ _ - _ MW-11 08/28/16 12.39 - - - - - - - - - - - _ _ _ _ MW-11 03/30/16 12.39 - - - - - - - - - - _ _ _ _ _ MW-11 08/29/16 12.39 - - - - - - - - - - _ _ _ - - Unable to access(truck parked) 1AW-11 10/29/16 12.39 32.16 -19.77 <60 <0.50 <0.50 <0.50 <0.50 <0.50 <10 <0.50 5.8 <0.50 <0.50 <0.50 <250 MW-11 03/10/17 12.39 - - - - - - - - - - - - - - _ MW-11 08/11/17 12.39 - - - - - - - - - - - - - _ _ Unable to acres MW-11 08/24/17 12.39 25.40 -13.01 76 <0.50 <0.50 <0.50 <1.0 <0.50 <10 <0.50 6.0 <0.50 <0.50 <0.5D <250 MW-11 02/28/18 12.39 24.33 -11.94 140 <0.50 <0.50 <0.50 0.0 <0.50 <10 <0.50 4.3 <0.50 <0.50 <0.50 <250 MW-11 08/31/18 12.39 23.50 -11.11 <50 <0.50 <0.50 <0.50 0.0 <0.50 <10 <0.50 4.0 <0.50 <0.50 <0.50 <250 MW-11 03/01/19 12.39 21.91 -9.52 <50 <0.50 <0.50 <0.50 0.0 <0.50 <10 <0.50 3.5 <0.50 <0.50 <0.50 <250 MW-11 09/05/19 12.39 19.96 -7.57 <50 <0.50 <0.50 <0.50 0.0 <0.50 <10 <0.50 3.3 <0.50 <0.50 <0.50 <250 MW-11 02/28/20 12.39 19.35 -6.96 <5D <0.50 <0.50 <0.50 0.0 <0.50 <10 <0.50 2.8 <0.50 <0.50 <0.50 <250 MW-12 07/28/03 - - - - - - - - - - - - _ _ _ - Inaccessible MW-12 10/08/03 10.64 33.20 -22.56 <50 <0.50 <0.50 <0.50 <1.0 2.2 <100 <2.0 16 <2.0 <2.0 <2.0 <500 MW-12 01/12/04 10.64 32.76 -22.12 56 <0.50 <0.50 1.7 2.5 3.1 <100 <2.0 13 <2.0 <2.0 <2.0 <500 M W-12 04/26/04 10.64 31.30 -20.66 120 <0.50 <0.50 <0.50 <1.0 1.5 <5.0 <D.50 24 0.0 <0.50 <0.50 <50 MW-12 07/13/04 10.64 32.48 -21.84 <50 <0.50 <0.50 <0.50 0.0 <0.50 <5.0 <0.50 24 1.2 <0.50 <0.50 <50 MW-12 10/26/D4 10.64 34.45 -23.81 63 <0.50 <0.50 <0.50 0.0 6.2 <5.0 <0.50 13 <1.0 <0.50 <0.50 <50 MW-12 01/12/05 10.64 33.79 -23.15 <50 <0.50 <0.50 <0.50 0.0 7.3 <5.0 <0.50 14 0.0 <0.50 <0.50 <50 MW-12 04/12/05 10.64 31.55 -20.91 <50 <0.50 <0.50 <0.50 0.0 1.1 <5.0 <0.50 26 0.65 <0.50 <0.50 <50 MW-12 07/12/05 10.64 30.55 -19.91 <50 <0.50 <0.50 <0.50 <1.0 0.67 <5.0 <0.50 19 <0.50 <0.50 <0.50 <50 MW-12 10/06/06 10.64 32.09 -21.45 62 <0.50 <0.50 0.65 0.0 2.7 <5.0 <0.50 23 <0.50 <0.50 <0.50 <50 MW-12 01/12/06 10.64 30.21 -19.57 <50 <0.50 <0.50 <0.50 <1.0 7.4 <10 - 24 <0.50 <0.50 <0.50 <250 MW-12 04/12/06 10.64 28.31 -17.67 <50 <0.50 <0.50 <0.50 <1.0 3.6 <10 - 14 <0.50 <0.50 <0.50 <250 GHD 11193145(5)