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<br /> Table 6
<br /> Joint Groundwater Monitoring Data and Analytical Results
<br /> Former Vintage Car Wash
<br /> 601 East Miner Avenue
<br /> Stockton, California
<br /> Product MTBE MTBE
<br /> WELL ID! DATE DTW S.I. GWE Thickness TPHg B T E X by 8021 by 8260
<br /> TOC-{jt) N) (/tbgs) (-I) (A) (P b) (Ppb) (ppb) Pb) pjb) b) b)
<br /> MW-1
<br /> 12.68 03/22/93 55.32 50-75 -42.64 0.03-1.16 -- -- - __ _
<br /> 06/18/93 52.82 -40.14 Sheen 200,000 51,000 44,000 2,900 18,000 NA
<br /> 12/17/93 52.94 -00.26 0.03 -- -- - -- - - --
<br /> 04/13/94 51.22 -38.54 Sheen - - - - - - --
<br /> 04/24/97 -- -- - - - - - -- --
<br /> 09/30/97 36.59 -23.91 -- - -- -- - -- - --
<br /> 12/30/97 35.88 -23.20 -- -- - -- - -- _ --
<br /> 04/22/98 - - - 168,000 37,500 27,200 3,400 18,600 <5000 -
<br /> 05/18/00 27.17 -14.49 0.00 18,600 1,920 834 348 3,060 47.4 47.4
<br /> 08/04/00 27.53 -14.85 0.00 35,000 3,000 1,500 600 3,600 73 73
<br /> 11/06/00 28.50 -15.82 0.00 14,000 850 210 1,700 4,300 34 34
<br /> 02115-16101 28.44 -15.76 <0.01 21,000 1,500 1,000 230 2,500 <2.0 <2.0
<br /> 05101-02101 27.83 -15.15 0.00 16,000 970 640 220 1,500 <2.0 <2.0
<br /> 08106-07102 28.61 -15.93 0.00 10,000 560 370 200 950 <2.0 <2.0
<br /> 11/26/01 30.17 -17.49 0.00 29,000 400 200 28 4,100 33 36
<br /> 12.08 02/25/02 29.50 -17.42 0.00 12,000 350 390 320 1,420 <2.0 --
<br /> 05/07/02 29.62 -17.54 0.00 13,000 910 580 380 1,500 <20 --
<br /> 08/12/02 31.47 -19.39 0.00 13,000 180 52 35 120 28 28
<br /> 11105-06102 32.55 -20.47 0.00 9,200 460 270 160 550 <20 17
<br /> 02//04/03 32.05 -19.97 0.00 5,300 230 170 64 280 8.8 8.8
<br /> 05127-28103 31.83 -19.75 0.00 7,800 190 410 260 1,100 13 13
<br /> 08/26/03 33.02 -20.94 0.00 6,200 350 250 200 780 8.7 --
<br /> 11/24/2003' 34.05 -21.97 - 11,000 1,800 400 590 1,500 <100 17
<br /> 02/16/04 33.31 -21.23 -- - - -- - -- - --
<br /> 05/11/04 32.86 -20.76 0.00 4,600 280 140 140 520 42 -
<br /> 08/16/04 34.12 -22.04 0.00 NS NS NS NS NS NS NS
<br /> 11/16/04 34.90 -22.82 0.00 11,000 1,000 270 480 1,400 11
<br /> 02J14105 33.96 -21.88 0.00 NS NS NS NS NS NS NS
<br /> 06940-325 1 of 12 ENSR Corporation
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