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TABLE 1 <br /> GROUNDWATER DATA <br /> THRIFTY OIL STATION#171, STOCKTON, CA <br /> DATE ANALYTICAL PARAMETERS DEPTH TO DEPTH TO PRODUCT CASING GROUNDWATER <br /> SAMPLED TPI/-g BENZENE TOLUENE EthylBenzene XYLENE MTBE GROUNDWATER PRODUCT THICKNESS ELEVATION ELEVATION <br /> (40 (UVL) (ug L) (UgIL) (,gtL) 091 ) (feet) (feet) (feet) (feet) (feet) <br /> 08/13/97 64 12 074 <0 3 11 31 <br /> 11/13/97 92 000 10 000 27,000 2 800 15,000 470 5170 NP 000 93 68 41 98 <br /> 02/11/98 65 000 7 400 17 000 1 100 6 900 670 4820 NP 000 93 68 4548 <br /> 05/28/98 470 16 11 <0 3 24 460 5055 NP 000 9368 43 13 <br /> 08/12/98 190 <03 <03 <03 <05 390 4745 NP 000 9168 4623 <br /> 11/10/98 110 <0 3 1 <03 <03 <05 260 5275 NP 000 93 68 4093 <br /> 02/25/99 98 <0 3 <03 <03 <05 160 38 35 NP 000 15 11 -2324 <br /> 05/14/99 4 000 <03 <0 3 <0 3 <05 7200 40 38 NP 000 15 11 -2527 <br /> 08/18/99 <50 <03 <03 <03 <05 <20 3906 NP 000 15 11 -2395 <br /> 11/16/99 59 000 3 900 11,000 1 000 8 900 1 000 41 26 NP 000 15 11 -2615 <br /> 02/09/00 25,000 2,300 5 400 <30 3 400 420 4076 NP 000 15 11 -2565 <br /> 05/17/00 11 000 852 1 700 <6 1,400 415 41 90 NP 000 15 11 -2679 <br /> 08/23/00 9 430 1 260 563 <02 1 670 884 4055 NP 000 15 11 -2544 <br /> 11/15/00 <50 <03 <02 <02 <04 150 4189 NP 000 15 11 -2678 <br /> 02/14/01 <50 <03 <02 <02 <04 149 4050 NP 000 15 11 -2539 <br /> 05/15/01 148 <03 <02 <02 <04 227 4050 NP 000 15 11 2539 <br /> MONITORING WELL#TB-S <br /> 06/08/95 75 000 6,500 8 100 270 14 000 - - <br /> 08/16/95 2,700 1,100 480 ND 3,700 6103 NP 000 9438 33 35 <br /> 11/13/95 4 000 610 27 28 46 61 12 NP 000 9438 3326 <br /> 02/13/96 2 100 150 66 12 47 61 15 NP 000 9438 33 23 <br /> 05/14/96 1 300 84 70 10 22 - 5143 NP 000 94 38 1 4295 <br /> 08/28/96 740 84 29 099 11 *31 5470 NP 000 9438 3968 <br /> 11/14/96 <50 <03 <0 3 <0 3 <05 *<20 53 50 NP 000 9438 4088 <br /> 02/12/97 SAMPLES LOST 50 10 NP 000 9438 4428 <br /> 05/14/97 180 <03 <0 3 0 37 0 86 *<20 53 68 NP 000 9438 4070 <br /> 08/13/97 64 <03 <03 <0 3 <0 5 <20 - - <br /> 11/13/97 810 15 3 9 17 46 <20 5260 NP 000 94 38 41 78 <br /> 02/11/98 <50 <03 049 <0 3 16 <20 4922 NP 000 9438 4516 <br /> 05/28/98 <50 <0 3 <0 3 <0 3 <05 1 <20 5140 t NP 000 9438 4299 <br /> 171 TAB I XLS Page 7 of 9 6/6/01 <br />