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TaPata
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<br /> Groundwater Monitoring and Analytical Results
<br /> Former Unocal Service Station#0187
<br /> 437 East Miner Avenue
<br /> Stockton, California
<br /> Product
<br /> Well ID/ Date DTW GWE Thickness TPH(G) 8 T E X MTBE
<br /> TOC* (ft) (ft) (ft) < ._....._...->
<br /> U-2 11/03197 3302 -21 53 000 <50 <05 <0 5 <05 <05 <5 0
<br /> (cont) 02/13/98 3041 -1892 000 <50 <0 50 <0 50 <0 50 <0 50 <2 5
<br /> 03/09/98 2949 -1800 000 <50 <0 50 <0 50 <0 50 <0 50 <2 5/<2 Q4
<br /> 05/26/98 2708 -1559 000 <50 <0 50 <0 50 <0 50 <0 50 <25
<br /> U-3
<br /> 1125 08/19/94 47 12 -35 87 000 51,000 9,700 1,300 2,100 5,600 --
<br /> 11/17/94 4748 -3623 000 42,000 9,600 1,800 2,000 4,600 --
<br /> 02/17/95 45 57 -3432 000 47,000 9,100 2,100 1,600 5,300 --
<br /> 05/09/95 42 82 -31 57 000 53,000 7,600 3,900 2,600 11,000 --
<br /> 08/09/95 41 15 -2990 000 38,000 4,800 1,900 2,100 9,600 --
<br /> 11/08/95 4103 -2978 000 28,000 2,400 1,400 1,900 4,900 --
<br /> 02/06/96 3942 -28 17 000 36,000 3,700 1,400 1,900 8,000 3
<br /> 05/07196 3669 -2544 000 36,000 4,600 1,800 2,400 10,000 3
<br /> 08/06/96 3647 -2522 000 43,000 2,600 1,000 1,700 7,000 --
<br /> 11/05/96 3605 -24 80 000 43 000 2,400 1,000 1,600 6,300 --
<br /> 02103/97 3244 -21 19 000 39,000 2,100 1,100 1,500 6,100 <500
<br /> 05/01/97 3173 -2048 000 19,000 1,100 660 1,200 5,000 260
<br /> 08/04/97 3202 -2077 000 810 35 21 67 15 <50
<br /> 11/03/97 3300 -2175 000 25,000 960 580 1,500 5,100 <130
<br /> 02/13/98 3022 -18 97 000 41,000 1,700 820 1,900 6,300 <500
<br /> 03/09/98 2940 -18 15 000 28,000 1,300 600 1,200 4,500 <250/<1004
<br /> 05/26/98 2697 -1572 000 2,300 46 31 56 110 <25
<br /> U4
<br /> 11 71 08/09/95 4203 -3032 000 -- -- -- -- --
<br /> 11/08/95 41 72 -3001 000 440 49 12 066 230 --
<br /> 02/06/96 4029 -28 58 000 340 <20 <20 <20 72 --
<br /> 05/07/96 37 25 -25 54 000 320 62 20 14 1 8 --
<br /> 08/06/96 3694 -25 23 000 330 110 068 13 20 -
<br /> 11/05/96 36 81 -25 10 000 190 3 9 <0 5 <0 5 <05 --
<br /> 02103197 3340 -21 69 000 260` 1 9 <0 5 <05 16 85
<br /> 05/01/97 3221 -2050 000 77 <05 089 <0 5 23 <50
<br /> 0187 zlsl#280045 2 As of 05/26/98
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