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TAB 1 <br /> GROUNDWATER DATA <br /> THRIFTY OIL STATION #172, STOCKTON, CA <br /> DATE ANALYTICAL PARAMETERS DEPTH TO DEPTH TO PRODUCT CASING GROUNDWATEIR <br /> SAMPLED TPII BENZENE TOLUENE EthylBeazeae XYLENE MTBE GROUNDWATER PRODUCT THICKNESS ELEVATION ELEVATION <br /> (ug/L) 09/0 fug/L) fagl) (feet) (feet) (feet) (feet) (feet) <br /> 08/05/92 700 66 17 ND 47 - 5740 NP 000 1220 -4520 <br /> 11/24/92 1,400 720 69 ND 120 5705 NP 000 1220 -4485 <br /> 02/24/93 9 700 1,800 790 210 1 000 - 53 75 NP 000 1220 -41 55 <br /> 05/20/93 35 000 8 000 7 400 290 6200 - 52 85 NP 000 1220 -4065 <br /> 09/09/93 20,000 3200 1 000 400 2,300 - 5483 NP 000 1220 -4263 <br /> 11/30/93 8,000 1 400 270 150 610 - 5258 NP 000 1220 -4038 <br /> 02/23/94 63,000 4,600 3 600 1 400 5,900 58 33 NP 000 1220 -46 13 <br /> 05/31/94 100 000 9,200 11,000 3,000 13 000 47 72 NP 000 1220 -3552 <br /> 08/15/94 62 000 4 500 5 200 1 000 6,700 5034 NP 000 1220 -3814 <br /> 11/08/94 570 26 43 94 35 51 12 NP 000 1220 -3892 <br /> 02/08/95 72 000 5,400 6,400 2,700 9 900 4829 NP 000 1220 -3609 <br /> 05/09/95 - - - - 4662 NP 000 1220 -3442 <br /> 08/08/95 73 000 4 600 7 100 2,400 12 000 - 4768 NP 000 1220 -3548 <br /> 02/29/96 26 000 1 200 3,000 1 600 6 000 *200 5746 NP 000 1220 -4526 <br /> 05/29/96 11 000 580 570 510 2200 *75 51 30 NP 000 1220 -3910 <br /> 08/14/96 <1 000 1200 830 1,500 4,700 *26 000 43 50 NP 000 1220 -3130 <br /> 11/26/96 <50 12 059 <03 <05 *61 42 12 NP 0 00 1220 -2992 <br /> 02/25/97 23 170 27 280 580 *2,700 3920 NP 000 1220 -2700 <br /> 05/28/97 310 47 12 11 59 *59 37 55 NP 000 1220 -2535 <br /> 08/19/97 9 100 340 100 390 1 200 49 4090 NP 000 1220 -2860 <br /> 11/26/97 110 1 9 <0 3 <0 3 <05 26 3900 NP 000 1220 -2680 <br /> 02/18/98 <50 <03 <03 <0 3 <05 46 3438 NP 000 1220 -22 18 <br /> 05/27/98 130 37 32 24 17 27 4200 NP 000 1220 -2980 <br /> 08/26/98 <50 <03 <03 <0 3 <05 40 31 40 NP 000 1220 -1920 <br /> 11/24/98 <50 <03 <03 <03 <05 27 33 80 NP 000 1220 21 60 <br /> 02/18/99 <50 <03 <03 <0 3 <05 1 <20 28 15 NP 000 1220 -1595 <br /> 05/20199 <50 <03 <03 <0 3 <05 <20 3070 NP 000 1220 -1850 <br /> 08118!99 <50 <03 <03 <0 3 <05 <20 3437 NP 000 1220 -22 17 <br /> 11/10/99 <50 <03 <03 <0 3 <05 <20 3745 NP 000 1220 -2525 <br /> 02/23/00 <50 <0 25 <0 25 <0 25 <05 *<5 1 <5 3898 NP 000 1220 -2678 <br /> 05/10/00 <50 <0 25 <0 25 <0 25 <05 <5 3005 NP 000 1220 -1785 <br /> 08/18/00 <50 <5 <5 <5 <5 <5 3390 NP 000 1220 -21 70 <br /> 11/09/00 <50 <0 18 <0 14 <0 18 <0 26 <0 24 34 38 NP 000 1220 -2218 <br /> 02/15/01 <50 <01 <02 <02 <04 <06 3097 NP 000 1220 -1877 <br /> 05/17/01 1 <50 J <03 1 <02 <02 <04 <06 3591 NP 000 1220 -2371 <br /> 172TAB1 XLS Page 2 of 11 12113101 <br />