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TAR 1 <br /> GROUNDWATER DATA <br /> THRIFTY OIL STATION #171, STOCKTON, CA <br /> DATE ANALYTICAL PARAMETERS DEPTH TO DEP'T'H TO PRODUCT CASING GROUNDWATER <br /> SAMPLED TPH-g I BENZENE TOLUENE EthylBenzene XYLENE MTBE GROUNDWATER PRODUCT THICKNESS ELEVATION ELEVATION <br /> (ug/L) (uP/L) (u€/L) (ug/L) (ug/L) {ugll) {feet) (feet) (fcet) (feet) (feet) <br /> MONITORING WELL M-IQ Screen Interval = 20 to 70 feet <br /> 06/08/95 2200 l9 29 ND 12 _ <br /> 11/13/95 6 000 92 18 14 15 5964 NP 000 93 l6 3352 <br /> 02/13/96 1 700 460 82 ND 57 5966 NP 000 93 16 3350 <br /> 05/14/96 1 000 49 037 054 3 0 - 5033 NP 000 93 16 4283 <br /> 08/28/96 1 500 18 0 84 046 12 #24 53 15 NP 000 93 16 4001 <br /> 11/14/96 120 <0 3 <03 <0 3 <05 *<20 52 18 NP 000 93 16 4098 <br /> 02/12/97 SAMPLES LOST 4930 NP 000 93 16 4386 <br /> 05/14/97 46 000 80 13 000 880 5 900 *<1 000 53 36 NP 000 93 16 3980 <br /> 08/13/97 49220__ 8 400 14 000 35 6 400 60 <br /> 11/13/97 <50 <0 3 <03 <03 <0 5 <20 5160 NP 000 93 16 41 56 <br /> 02/11/98 <50 <0 3 <0 3 <03 <0 5 40 4790 NP 000 93 16 4526 <br /> 05/28/98 <50 <0 3 <0 3 <0 3 <0 5 50 5040 NP 000 93 16 4276 <br /> 08/12/98 <50 <0 3 <03 <0 3 <05 60 4125 NP 000 93 16 5191 <br /> 11/10/98 <50 <03 <03 <0 3 <05 58 5045 NP 000 93 16 4271 <br /> 02/25/99 <50 <0 3 <03 <0 3 <0 5 76 3801 NP 000 1463 -2338 <br /> 05/14/99 <50 <0 3 <03 <03 <0 5 22 4200 NP 000 1463 2737 <br /> 08/18/99 <50 <03 <03 <03 <05 <20 38 18 NP 000 1463 23 55 <br /> 11/16/99 250 031 <03 <0 3 <05 500 40 54 NP 000 1463 -2591 <br /> 02/09/00 240 <03 <03 <03 <05 480 4202 NP 000 1463 2739 <br /> 05/17/00 <50 <0 25 <0 25 <0 25 <05 492 4506 NP 000 1463 3043 <br /> 08/23/00 90 92 <02 <02 <04 563 3957 NP 000 1463 -2494 <br /> 11/15/00 <50 <0 3 <02 <0 2 <04 31 43 50 NP 000 1463 -28 87 <br /> 02/14/01 <50 381 <02 <02 <04 14 3975 NP 000 1463 2512 <br /> 05/15/01 <50 <03 <02 <02 <04 43 3975 NP 000 1463 -2512 <br /> O8/15/01 <50 <0 3 <02 <0 2 <04 <06 43 50 NP 000 1463 -28 87 <br /> 11/06/01 <50 <0 3 <02 <0 2 <04 <06 45 75 NP 000 1463 3112 <br /> 02/13/02 214 14 <02 <02 <04 114 4290 NP 000 1463 -2827 <br /> 05/07/02 <50 <03 <02 <02 1 <04 <06 43 45 NP 000 1463 2882 <br /> 08/07/02 <50 <0 08 <0 18 <017 <04 <0 07 4632 NP 000 1463 -31 69 <br /> 11/13/02 <50 <0 08 <0 18 <017 <04 75 4905 NP 000 1463 3442 <br /> 02/19/03 <15 <0 22 <0 32 <0 31 <04 <0 18 4904 NP 000 14 63 3441 <br /> 05/14/03 <t5 <0 22 <0 32 <0 31 <0 4 <0 18 44 16 NP 000 14 63 -2953 <br /> 08/12/03 <l5 <0 22 <0 32 <0 31 <0 4 <0 l8 48 04 NP 0 00 1463 -3341 <br /> 171 TAB Xl_S Page 10 of 11 10/20/03 <br />