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Page 7 of 25
<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. mei)
<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 />TEA
<br />(pg/L)
<br />FOB
<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-5 07/13/04 12.17 34.15 -21.98 1,800 <2.5 <2.5 140 270 13 <25 <2.5 2.6 <5.0 <2.5 <2.5 <250
<br />MW-5 10/26/04 12.17 36.16 -23.99 4,200 <2.5 <2.5 270 530 100 <25 <2.5 <2.5 <5.0 <2.5 <2.5 <250
<br />MW-5 01/12/05 12.17 35.50 -23.33 9,600 <2.5 3.0 430 1200 290 <25 <2.5 <2.5 <5.0 <2.5 <2.5 <250
<br />MW-5 04/12/05 12.17 33.01 -20.84 7,100 <2.5 <2.5 290 650 300 <25 <2.5 <2.5 <2.5 <2.5 <2.5 <250
<br />MW-5 07/12/05 12.17 32.12 -19.95 6,400 <2.5 2.6 210 640 280 <25 <2.5 <2.5 <2.5 <2.5 <2.5 <250
<br />MW-5 10/06/05 12.17 33.76 -21.58 980 <2.0 <2.0 37 90 210 66 <2.0 <2.0 <2.0 <2.0 <2.0 <200
<br />MW-5 01/12/06 12.17 32.61 -20.44 1,600 <0.50 <0.50 4.6 120 320 84 - <0.50 <0.50 <0.50 <0.50 <250
<br />MW-5 04/12/06 12.17 30.51 -18.34 120 3.2 1.9 3.1 8.3 22 <25 - <0.50 <0.50 <0.50 <0.50 <250
<br />MW-5 07/10/06 12.17 28.79 -16.62 21,000 11 7.0 310 550 12,000 3,500 - <5.0 <5.0 <5.0 12 <2,500
<br />MW-5 10/18/06 12.17 29.08 -16.91 14,000 <25 <25 130 320 11,000 7,600 - <25 <5.0 <5.0 <25 <2,500
<br />MW-5 03/12/07 12.17 29.17 -17.00 15,000 <0.50 <0.50 240 390 18,000 <1,000 - <50 <50 <50 <50 <25,000
<br />MW-5 05/15/07 12.17 28.96 -16.79 16,000 15 15 47 100 17,000 2,800 <0.50 0.91 <0.50 <0.50 14 <250
<br />MW-5 08/01/07 12.17 29.64 -17.47 16,000 <12 <12 53 120 13,000 3,800 <12 <12 <12 <12 16 <6,200
<br />MW-5 11/19/07 12.17 30.45 -18.28 21,000 <50 <50 430 610 22,000 <1,000 <50 <50 <50 <50 <50 <25,000
<br />MW-5 01/22/08 12.17 29.70 -17.53 18,000 <25 <25 110 190 29,000 1,100 <25 <25 <25 <25 <25 <12,000
<br />MW-5 04/07/08 12.17 28.62 -16.45 18,000 a <25 <25 130 270 25,000 1,200 <25 <25 <25 <25 27 <12,000
<br />MW-5 07/21/08 12.17 29.93 -17.76 20,000 2.6 7.6 250 440 20,000 5,700 <0.50 <0.50 <0.50 <0.50 33 <250
<br />MW-5 10/20/08 12.17 31.44 -19.27 27,000 <50 <50 580 870 20,000 3,300 <50 <50 <50 <50 <50 <25000
<br />MW-5 01/19/09 12.17 31.80 -19.63 24,000 <50 <50 590 680 4,400 12,000 <50 <50 <50 <50 <50 <25,000
<br />MW-5 04/20/09 12.17 31.11 -18.94 14,000 <5.0 <5.0 380 620 14,000 4,400 <5.0 <5.0 <5.0 <5.0 24 <2,500
<br />MW-.5 07/20/09 12.17 32.19 -20.02 1,400 <50 <50 <50 <100 7,300 <1000 <50 <50 <50 <50 <50 <25000
<br />MW-5 01/04/10 12.17 32.83 -20.66 13,000 <50 <50 320 390 13,000 <1000 <50 <50 <50 <50 <50 <25000
<br />MW-5 07/19/10 12.17 30.20 -18.03 8,100 <0.50 1.7 320 190 6,100 3,400 <0.50 2.0 <0.50 <0.50 9.6 <250
<br />MW-5 01/05/11 12.17 30.13 -17.96 3,000 <0.50 <0.50 2.2 3.2 3,600 1,700 <0.50 1.2 <0.50 <0.50 5.6 <250
<br />MW-5 08/02/11 12.17 28.01 -15.84 580 <0.50 <0.50 <0.50 1.9 500 48 <0.50 <0.50 <0.50 <0.50 <0.50 <250
<br />MW-5 03/27/12 12.17 26.95 -14.78 1,700 <0.50 <0.50 12 210 98 72 <0.50 <0.50 <0.50 <0.50 <0.50 <250
<br />MW-5 09/04/12 12.17 27.56 -15.39 <50 <0.50 <0.50 <0.50 <1.0 17 17 <0.50 <0.50 <0.50 <0.50 <0.50 <250
<br />MW-5 02/25/13 12.17 26.28 -14.11 640 <0.50 <0.50 3.0 60 110 340 <0.50 0.54 <0.50 <0.50 <0.50 <250
<br />MW-5 08/13/13 12.17 27.30 -15.13 1,700 <0.50 <0.50 5.9 130 120 450 <0.50 <0 50 <0.50 <0.50 <0.50 <250
<br />MW-5 02/07/14 12.17 27.65 -15.48 1,500 <0.50 <0.50 6.8 170 180 1,200 <0.50 1.2 <0.50 <0.50 <0.50 <250
<br />MW-5 09/24/14 12.17 29.54 -17.37 2,200 <0.50 <0.50 6.6 130 270 1,400 <0.50 1.9 <0.50 <0.50 <0.50 <250
<br />MW-5 03/18/15 12.17 29.82 -17.65 850 <0.50 <0.50 2.1 64 170 630 <0.50 1.0 <0.50 <0.50 <050 <250
<br />MW-5 08/28/15 12.17 31.64 -19.47 2,000 <0.50 <0.50 5.5 68 610 <10 <0.50 <0.50 <0.50 <0.50 <0.50 <250
<br />MW-5 03/30/16 12.17 30.94 -18.77 2,200 c <0.50 <0.50 1.1 36 59 <10 <0.50 0.62 <0.50 <0.50 <0.50 <250
<br />MW-5 08/29/16 12.17 31.02 -18.85 2,000 <0.50 <0.50 4.1 46 85 <10 <0.50 <0.50 <0.50 <0.50 <0.50 <250
<br />MW-5 10/29/16 12.17 31.46 -19.29 - - - -- - - - - - - - - -
<br />MW-5 03/10/17 12.17 27.10 -14.93 1,500 <0.50 <0.50 1.0 25 70 <10 <0.50 <0.50 <0.50 <0.50 <0.50 <250
<br />MW-5 08/11/17 12.17 24.87 -12.70 330 <0.50 <0.50 <0.50 <1.0 40 <10 <0.50 <0.50 <0.50 <0.50 <0.50 <250
<br />MW-5 02/28/18 12.17 23.81 -11.64 1,400 <0.50 <0.50 1.0 11 34 <10 <0.50 <0.50 <0.50 <0.50 <0.50 <250
<br />MW-5 08/31/18 12.17 23.09 -10.92 1,400 <0.50 <0.50 0.95 10 30 <10 <0.50 <0.50 <0.50 <0.50 <0.50 <250
<br />MW-5 03/01/19 12.17 21.50 -9.33 1,300 <0.50 <0.50 0.87 6 110 24 <0.50 1.7 <0.50 <0.50 <0.50 <250
<br />MW-5 09/05/19 12.17 19.65 -7.48 1,200 <0.50 <0.50 0.48 J 3.9 200 <10 <0.50 3.8 <0.50 <0.50 <0.50 <250
<br />MW-5 02/28/20 12.17 19.02 -6.85 1,500 <1.0 <1.0 0.32 J 2.6 150 <20 <1.0 2.3 <1.0 <1.0 <1.0 <500
<br />GHD 11193145(5)
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