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Page 22 of 25
<br />Table 1
<br />Historical Groundwater Gauging and Analytical Results
<br />Union OH 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. ams1)
<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 />DIPE
<br />(pg/L)
<br />ETBE
<br />(pg/L)
<br />TAME
<br />(pg/L)
<br />Ethanol Comments
<br />(pg/L)
<br />Mw-la 01/19/09 11.34 30.83 -19.49 3,200 <12 <12 12 <25 4,300 1,700 <12 <12 <12 <12 <12 <6,200
<br />MW-18 04120/09 11.34 30.12 -18.78 3,900 <5.0 <5.0 24 <10 2,600 1,600 <5.0 <5.0 <5.0 <5.0 <5.0 <2,500
<br />MW-18 07/20/09 11.34 31.15 -19.81 2,600 <10 <10 10 <20 1,700 1,800 <10 <10 <10 <10 <10 <5000
<br />MW-18 01/04/10 11.34 31.80 -20.46 3,400 <1.0 <1.0 16 <2.0 1,100 620 <1.0 2.2 <1.0 <1.0 <1.0 <500
<br />MW-18 07/19/10 11.34 29.22 -17.88 6,800 <2.5 <2.5 31 18 2,000 1,100 <2.5 4.1 <2.5 <2.5 <2.5 <1200
<br />MW-18 01/05/11 11.34 29.18 -17.84 3,900 <2.5 <2.5 24 <5.0 880 <50 <2.5 2.7 <2.5 <2.5 <2.5 <1200
<br />MW-18 08/02/11 11.34 27.06 -15.72 600 <0.50 <0.50 1.8 <1.0 38 31 <0.50 <0.50 <0.50 <0.50 <0.50 <250
<br />MW-18 03/27/12 11.34 26.00 -14.66 1,400 <0.50 <0.50 1.1 <1.0 220 92 <0.50 <0.50 <0.50 <0.50 <0.50 <250
<br />MW-18 09/04/12 11.34 26.61 -15.27 690 <0.50 <0.50 0.5 <1.0 100 89 <0.50 <0.50 <0.50 <0.50 <0.50 <250
<br />MW-18 02/25/13 11.34 25.39 -14.05 2,100 <0.50 <0.50 21 8.1 120 350 <0.50 1.6 <0.50 <0.50 <0.50 <250
<br />MW-18 08/13/13 11.34 26.35 -15.01 1,400 <0.50 <0.50 11 2.7 85 290 <0.50 0.85 <0.50 <0.50 <0.50 <250
<br />MW-18 02/07/14 11.34 26.72 -15.38 1,400 <0.50 <0.50 13 <1.0 60 170 <0.50 0.82 <0.50 <0.50 <0.50 <250
<br />MW-18 09/24/14 11.34 28.40 -17.06 770 <0.50 <0.50 3.9 <1.0 33 340 <0.50 1.1 <0.50 <0.50 <0.50 <250
<br />MW-18 03/18/15 11.34 28.85 -17.51 660 <0.50 <0.50 2.2 1.0 28 240 <0.50 <0.50 <0.50 <0.50 <0.50 <250
<br />MW-18 08/28/15 11.34 30.63 -19.29 2,600 <0.50 <0.50 5.3 <1.0 36 <10 <0.50 <0.50 <0.50 <0.50 <0.50 <250
<br />MW-18 03/30/16 11.34 29.99 -18.65 4,300 c <0.50 <0.50 21 11 60 <10 <0.50 1.8 <0.50 <0.50 <0.50 <250
<br />MW-18 08/29/16 11.34 30.05 -18.71 4100 <0.50 <0.50 24 7.0 38 <10 <0.50 <0.50 <0.50 <0.50 <0.50 <250
<br />MW-18 03/10/17 11.34 26.15 -14.81 2,200 <0.50 <0.50 8.8 <1.0 23 <10 <0.50 2.0 <0.50 <0.50 <0.50 <250
<br />MW-18 08/11/17 11.34 23.90 -12.56 4,200 <0.50 <0.50 6.9 2.5 29 <10 <0.50 <0.50 <0.50 <0.50 <0.50 <250
<br />MW-18 02/28/18 11.34 22.89 -11.55 4,600 <0.50 <0.50 13 3.1 35 <10 <0.50 1.3 <0.50 <0.50 <0.50 <250
<br />MW-18 08/31/18 11.34 22.11 -10.77 4,400 <0.50 <0.50 13 2.1 17 <10 <0.50 1.6 <0.50 <0.50 <0.50 <250
<br />MW-18 03/01/19 11.34 20.53 -9.19 1,500 <0.50 <0.50 8.5 1.3 31 <10 <0.50 1.9 <0.50 <0.50 <0.50 <250
<br />MW-18 09/05/19 11.34 18.73 -7.39 1,900 <0.50 0.68 8.9 1.8 29 100 <0.50 <0.50 <0.50 <0.50 <0.50 <250
<br />MW-l8 02/28/20 11.34 18.15 -6.81 700 <0.50 <0.50 4.3 6.4 38 <10 <0.50 2.0 <0.50 <0.50 <0.50 <250
<br />MW-19 01/24/08 11.79 20.50 -13.71 1,100 <0.50 <0.50 <0.50 1.5 8,500 2,600 <0.50 <0.50 <0.50 <0.50 12 <250
<br />MW-19 04/07/08 11.79 28.07 -16.28 6,200 a <0.50 <0.50 <0.50 <1.0 9,100 930 <0.50 5.0 <0.50 <0.50 14 <250
<br />MW-19 07/21/08 11.79 29.45 -17.66 7,100 <10 <10 <10 <20 8,000 <200 <10 <10 <10 <10 <10 <5000
<br />MW-19 10/20/08 11.79 30.90 -19.11 8,000 <12 <12 <12 <25 8,700 <250 <12 <12 <12 <12 <12 <6200
<br />MW-19 01/19/09 11.79 31.26 -19.47 5,500 <5.0 <5.0 <5.0 <10 8,000 4100 <5.0 5.2 <5.0 <5.0 9.8 <2,500
<br />MW-19 04/20/09 11.79 30.56 -18.77 6,100 <12 <12 <12 <25 6,800 970 <12 <12 <12 <12 <12 <6,200
<br />MW-19 07/20/09 11.79 31.66 -19.87 710 30 16 3.0 <5.0 230 <50 <2.5 <2.5 <2.5 <2.5 <2.5 <1200
<br />MW-19 01/04/10 11.79 32.30 -20.51 2,800 <10 <10 <10 <20 2,900 <200 <10 <10 <10 <10 <10 <5000
<br />MW-19 07/19/10 11.79 29.63 -17.84 2,000 <0.50 <0.50 <0.50 <1.0 1,600 550 <0.50 4.1 <0.50 <0.50 1.9 <250
<br />MW-19 01/05/11 11.79 29.61 -17.82 2,100 <0.50 <0.50 <0.50 <1.0 1,200 <10 <0.50 4.2 <0.50 <0.50 <0.50 <250
<br />MW-19 08/02/11 11.79 27.47 -15.68 1,300 <0.50 <0.50 <0.50 <1.0 680 150 <0.50 3.3 <0.50 <0.50 <0.50 <250
<br />MW-19 03/27/12 11.79 26.42 -14.63 280 <0.50 <0.50 <0.50 <1.0 220 160 <0.50 1.9 <0.50 <0.50 <0.50 <250
<br />MW-19 09/04/12 11.79 27.06 -15.27 790 <0.50 <0.50 <0.50 <1.0 450 210 <0.50 3.6 <0.50 <0.50 0.69 <250
<br />MW-19 02/25/13 11.79 25.78 -13.99 200 <0.50 <0.50 <0.50 <1.0 130 160 <0.50 2.7 <0.50 <0.50 <0.50 <250
<br />MW-19 08/13/13 11.79 26.77 -14.98 82 <0.50 <0.50 <0.50 <1.0 82 47 <0.50 1.7 <0.50 <0.50 <0.50 <250
<br />MW-19 02/07/14 11.79 27.14 -15.35 <50 <0.50 <0.50 <0.50 <1.0 33 <10 <0.50 1.4 <0.50 <0.50 <0.50 <250
<br />MW-19 09/24/14 11.79 28.84 -17.05 <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-19 03/18/15 11.79 30.28 -18.49 <50 <0.50 <0.50 <0.50 <1.0 <0.50 <10 <0.50 <0.50 <0.50 <0.50 <0.50 <250
<br />GHD 11193145 (5)
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