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r TAO 1 • <br /> GROUNDWATER DATA <br /> THRIFTY OIL STATION#172, STOCKTON, CA <br /> DATE ANALYTICAL PARAMETERS DEPTH TO DEPTH TO PRODUCT CASING GROUNDWATER <br /> SAMPLED TPH BENZENE TOLUENE EthylElenzene XYLENE MTBE GROUNDWATER PRODUCT "THICKNESS ELEVATION ELEVATION <br /> (ug/L) (e€/L) (ul#L) (ug/L) 4 'Ll (ug1L) (feel) (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 1000 53 75 NP 0 00 1220 -4155 <br /> 05/20/93 35 000 8 000 7 400 290 6200 5285 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 4613 <br /> 05/31/94 100 000 9200 11 000 3 000 13,000 4772 NP 000 1220 35 52 <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 /> 02108195 72 000 5 400 6 400 2 700 9 900 48 29 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 5130 NP 000 1220 -39 10 <br /> 08/14/96 <1 000 1200 830 1 500 4 700 *26 000 43 50 NP 000 1220 -31 30 <br /> 11/26/96 <50 1 2 059 <0 3 <05 *61 42 12 NP 000 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 1 1 59 *59 37 55 NP 000 1220 -2535 <br /> 08/19/97 9 100 340 100 390 1,200 49 4080 NP 000 1220 2860 <br /> 11/26/97 110 19 <03 <0 3 <05 26 3900 NP 000 1220 2680 <br /> 02/19199 <50 <03 <03 <0 3 <0 5 46 3438 NP 000 1220 22 18 <br /> 05/27/98 130 3 7 32 24 17 27 4200 NP 000 1220 -2980 <br /> 08/26/98 <50 <0 3 <03 <03 <0 5 40 3140 NP 000 1220 1920 <br /> 11/24/98 <50 <03 <03 <0 3 <0 5 27 33 80 NP 000 1220 2160 <br /> 02/18/99 <50 <0 3 <0 3 <0 3 <0 5 <20 28 15 NP 000 12 20 15 95 <br /> 05/20/99 <50 <0 3 <0 3 <03 <05 <20 3070 NP 000 1220 1850 <br /> 08/18/99 <50 <0 3 <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 25 25 <br /> 02/23/00 <50 <0 25 <0 25 <0 25 <0 5 *<51 <5 3898 NP 000 1220 -2678 <br /> 05110100 <50 <0 25 <0 25 <0 25 <05 <5 3005 NP 000 1220 -17 85 <br /> 08/18/00 <50 <5 <5 <5 <5 <5 3390 NP 000 1220 21 70 <br /> 11109/00 <50 <0 18 <0 14 <0 18 <0 26 <0 24 3438 NP 000 12 20 -22 18 <br /> 02/15/01 <50 <03 <02 <02 <04 <06 3097 NP 000 12 20 -1977 <br /> 05/17/01 <50 <03 <02 <02 <04 <06 3591 NP 000 1220 2371 <br /> 172TAB i XL 5 Page 2 of 10 6113101 <br />