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<br />Table 1
<br />Historical Groundwater Gauging and Analytical Results
<br />Union Oil Company of California
<br />Former 76 Station No. 4409 / Phillips 66 Site 2469
<br />1502 North El Dorado Street, Stockton, CA
<br />Well ID
<br />Sample
<br />Date
<br />TOC
<br />(ft. amsl)
<br />DTW
<br />(ft)
<br />GWE
<br />(ft. amsl)
<br />TPH-g
<br />(pg/L)
<br />Benzene
<br />(pg/L)
<br />Toluene
<br />(pg/L)
<br />Ethyl-
<br />benzene
<br />(pg/L)
<br />Total
<br />Xylenes
<br />(pg/L)
<br />MTBE
<br />(pg/L)
<br />TBA
<br />(pg/L)
<br />EDB
<br />(pg/L)
<br />1,2-DCA
<br />(pg/L)
<br />WE
<br />(pg/L)
<br />ETBE
<br />(pg/L)
<br />TAME
<br />(pg/L)
<br />Ethanol Comments
<br />(pg/L)
<br />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
<br />MW-9 03/30/16 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
<br />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
<br />MW-9 10/29/16 10.86 30.11 -19.25 - - - - - - - - - - - - -
<br />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
<br />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
<br />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
<br />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
<br />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
<br />MW-9 09/05/19 10.86 18.27 -7.41 <50 <0.50 <0.50 <0.50 <1.0 <0.50 <10 <0.50 <0.50 <0.50 <0.50 <0.50 <250
<br />MW-9 02/28/20 10.86 17.65 -6.79 <50 <0.50 <0.50 <0.50 <1.0 <0.50 <10 <0.50 <0.50 <0.50 <0.50 <0.50 <250
<br />MW-10 07/11/00 - 29.81 - 7,200 3.5 <2.5 110 32 <10 <500 - - <10 <10 <10 <2,500
<br />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
<br />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
<br />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 <1,200
<br />MW-10 07/11/02 11.30 29.81 -18.51 7,200 3.5 <2.5 110 32 <2.0 <25 <2.5 <2.5 <5.0 <2.5 <2.5 <130
<br />MW-10 11/14/02 11.30 32.70 -21.40 3,200 2.2 1.4 54 31 <2.0 <100 <2.0 <2.0 <2.0 <2.0 <2.0 <500
<br />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
<br />MW-10 04/28/03 11.30 30.88 -19.58 5,200 <5.0 <5.0 100 48 40 <1,000 <20 <20 <20 <20 <20 <5,000
<br />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
<br />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 <5,000
<br />MW-10 01/12/04 11.30 33.33 -22.03 2,700 <5.0 <5.0 46 15 910 <1,000 <20 <20 <20 <20 <20 <5,000
<br />MW-10 04/26/04 11.30 31.90 -20.60 1,700 <5.0 <5.0 15 <10 1,300 <50 <5.0 <5.0 <10 <5.0 <5.0 <500
<br />MW-10 07/13/04 11.30 33.21 -21.91 2,100 <5.0 <5.0 <5.0 <10 1,100 <50 <5.0 <5,0 <10 <5.0 <5.0 <500
<br />MW-10 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
<br />MW-10 01/12/05 11.30 34.52 -23.22 3,600 <0.50 <0.50 5.6 5.8 3,200 <130 <13 <13 <25 <13 <13 <1,300
<br />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
<br />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
<br />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 <1,300
<br />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 5.5 <250
<br />MW-10 04/12/06 11.30 29.53 -18.23 3,800 <0.50 <0.50 <5.0 <1.0 4,500 1,100 - 0.89 <0.50 <0.50 6.4 <250
<br />MW-10 07/10/06 11.30 27.83 -16.53 11,000 <0.50 <0.50 <50 <100 7,200 7,600 - <50 <50 <50 <50 <25,000
<br />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
<br />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
<br />MW-10 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
<br />MW-10 08/01/07 11.30 28.66 -17.36 7,100 <25 <25 <25 <25 7,000 6,500 <25 <25 <25 <25 <25 <12,000
<br />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
<br />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
<br />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
<br />MW-10 07/21/08 11.29 29.01 -17.72 5,600 <10 <10 <10 <20 6,300 9,600 <10 <10 <10 <10 <10 <5000
<br />MW-10 10/20/08 11.29 30.49 -19.20 5,900 <12 <12 <12 <25 5,900 6,700 <12 <12 <12 <12 <12 <6200
<br />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
<br />GHD 11193145 (5)
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