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Page 11 of 25 Table 1 Historical Groundwater Gauging and Analytical Results Union Oil Company of California Former 76 Station No.44091 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.amsl) (pg/L) (pg/L) (pg/L) (Ng/L) (ug/L) (Ng/L) (pg/L) (pg/L) (pg/U (pg/L) (pg/L) (pg/U (Ng/L) MW-8 10/26/04 12.61 36.83 -24.22 240 18 3.8 26 1.4 4.0 <5.0 <0.50 12 <1.0 <0.50 <0.50 <50 MW-8 01/12/05 12.61 35.15 -22.54 88 3.4 1.4 7.6 <1.0 5.7 <5.0 <0.50 23 <1.0 <0.50 <0.50 <50 MW-8 04/12/05 12.61 - - - - - - - - - - - - - - - MW-8 07/12/05 12.61 32.76 -2D.15 170 2.1 <0.50 4.1 <1.0 2.1 <5.D <0.50 4.9 <0.50 <0.50 <0.50 <50 MW-8 10/06/05 12.61 34.41 -21.80 180 1.7 <0.50 6.4 7.0 75 <5.0 <0.50 36 <0.50 <0.50 <0.50 <50 MW-8 01/12/06 12.61 33.38 -20.77 120 <0.50 <0.50 <0.50 <1.0 97 <10 - 42 <0.50 <0.50 <0.50 <250 MW-8 04/12/06 12.61 31.17 -18.56 <50 <0.50 <0.50 <0.50 <1.0 21 <10 - 22 <0.50 <0.50 <0.50 <250 MW-8 07/10/06 12.61 29.41 -16.80 76 <0.50 <0.50 <0.50 <1.0 20 <10 - 2.2 <0.50 <0.50 <0.50 <250 MW-8 10/18/06 12.61 30.60 -17.99 <50 <0.50 <0.50 <0.50 <1.0 9.8 <10 - 2.2 <0.50 <0.50 <0.50 <250 MW-8 03/12/07 12.61 29.78 -17.17 140 <0.50 <0.50 <0.50 <0.50 130 <10 - 13 <0.50 <0.50 <0.50 <250 MW-8 05/15/07 12.61 29.56 -16.95 170 <0.50 <0.50 <0.50 <0.50 140 48 <0.50 9.9 <0.50 <0.50 <0.50 <250 MW-8 08/01/07 12.61 30.23 -17.62 240 <0.50 <0.50 <0.50 <0.50 310 17 <0.50 41 <0.50 <0.50 <0.50 <250 MW-8 11/19/07 12.61 31.08 -18.47 200 0.77 <0.50 0.6 <0.50 230 <10 <0.50 47 <0.50 <0.50 <0.50 <250 MW-8 01/22/08 12.60 30.30 -17.7D <50 <0.50 <0.50 <0.50 0.0 39 <10 <0.50 41 <0.50 <0.50 <0.50 <250 MW-8 04/07/08 12.60 29.22 -16.62 <50 <0.50 <0.50 <0.50 <1.0 40 <10 <0.50 22 <0.50 <0.50 <0.50 <250 MW-8 07/21/08 12.60 30.55 -17.95 76 <0.50 <0.50 <0.50 0.0 60 <10 <0.50 16 <0.50 <0.50 <0.50 <250 MW-8 10/20/08 12.60 32.11 -19.51 92 <0.50 <0.50 <0.50 <1.0 74 <10 <0.50 22 <0.50 <0.50 <0.50 <250 MW-8 01/19/09 12.60 32.44 -19.84 <50 <0.50 <0.50 <0.50 <1.0 46 <10 <0.50 13 <0.50 <0.50 <0.50 <250 MW-8 04/20/09 12.60 31.76 -19.16 92 <0.50 <0.50 <0.50 <1.0 120 18 <0.50 15 <0.50 <0.50 <0.50 <250 MW-8 07/20/09 12.60 32.61 -20.01 170 <0.50 <0.50 <0.50 <1.0 140 56 <0.50 14 <0.50 <0.50 <0.50 <250 MW-8 01/04/10 12.60 33.30 -2D.70 89 <0.50 <0.50 <0.50 <1.0 68 31 <0.50 3.9 <0.50 <0.50 <0.50 <250 MW-8 07/19/10 12.60 30.57 -17.97 - - - - - - - - - - - - - MW-8 01/05/11 12.60 30.57 -17.97 <50 <0.50 <0.50 <0.50 0.0 4.3 <10 <0.50 1.2 <0.50 <0.50 <0.50 <250 MW-8 08/02/11 12.60 28.33 -15.73 - - - - - - - - - - - - - MW-8 03/27/12 12.60 27.29 -14.69 <50 <0.50 <0.50 <0.50 0.0 43 20 <0.50 6.3 <0.50 <0.50 <0.50 <250 MW-8 09/04/12 12.60 27.84 -15.24 - - - - - - - - - - - - - MW-8 02/25/13 12.60 26.60 -14.00 <50 <0.50 <0.50 <0.50 <1.0 23 26 <0.50 6.4 <0.50 <0.50 <0.50 <250 MW-8 08/13/13 12.60 32.04 -19.44 - - - - - - - - - - - - - MW-8 02/07/14 12.60 28.03 -15.43 <50 <0.50 <0.50 <0.50 <1.0 <0.50 <10 <0.50 <0.50 <0.50 <0.50 <0.50 <250 MW-8 09/24/14 12.60 29.74 -17.14 - - - - - - - - - - - - - MW-8 03/18/15 12.60 30.24 -17.64 <50 <0.50 <0.50 <0.50 <1.0 <0.50 <10 <0.50 <0.50 <0.50 <0.50 <0.50 <250 MW-8 OB/28/15 12.60 32.04 -19.44 - - - - - - - - - - - - - MW-8 03/30/16 12.60 31.32 -18.72 <50 <0.50 <0.50 <0.50 <1.0 <0.50 <10 <0.50 <0.50 <0.50 <0.50 <0.50 <250 MW-8 08/29/16 12.60 31.39 -18.79 - - - - - - - - - - - -MW-8 10/29/16 12.60 31.86 -19.26 - - - - - - - - - - - - - MW-8 03/10/17 12.60 27.55 -14.95 <50 <0.50 <0.50 <0.50 0.0 <0.50 <10 <0.50 <0.50 <0.50 <0.50 <0.50 <250 MW-8 08/11/17 12.60 25.24 -12.64 - - - - - - - - - - - - - MW-8 02/28/18 12.60 24.16 -11.56 100 <0.50 <0.50 <0.50 <1.0 40 <10 <0.50 6.0 <0.50 <0.50 <0.50 <250 MW-8 08/31/18 12.60 23.32 -10.72 - - - - - - - - - - - - - MW-8 03/01/19 12.60 21.80 -9.20 <50 <0.50 <0.50 <0.50 0.0 <0.50 <10 <0.50 <0.50 <0.50 <0.50 <0.50 <250 MW-8 09/05/19 12.60 20.26 -7.66 - - - - - - - - - - - - - M W-8 02/28/20 12.60 19.31 -6.71 <50 <0.50 <0.50 <0.50 <1.0 <0.50 <10 <0.50 <0.50 <0.50 <0.50 <0.50 <250 GHD 11193145(6)