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TAVI <br /> GROUNDWATER DATA <br /> THRIFTY OIL STATION#171, STOCKTON, CA <br /> DATE ANALYTICAL PARAMETERS DEPTH TO DEPTH TO PRODUCT CASING GROTINl714ATER <br /> SAMPLED TPH-g BENZENE TOLUENE EthylTlenzeue XYLENE MTBEGROUN1D%ATER PRODUCT' THICKNESS ELEVATION ELEVATION <br /> (uglL) (ug/L) (ugll-) 091L) E 919) (u�) (feet) (feet) (feet) (feet) (feet) <br /> 11/13/97 12 000 3 600 95 1 100 1 100 <20 5140 NP 000 93 34 41 94 <br /> 02/11/98 <50 <0 3 049 053 088 <20 48 20 NP 000 93 34 4514 <br /> 05/28/98 100 <0 3 <03 <0 3 <0 5 <20 5020 NP 000 9334 43 14 <br /> 08/12/98 110 <0 3 <03 <0 3 <0 5 <20 4070 NP 000 9334 5264 <br /> 11/10/98 <50 045 066 <0 3 <05 <20 48 35 NP 000 9334 4499 <br /> 02/25/99 <50 <0 3 075 <0 3 0 72 <20 38 20 NP 000 1480 -2340 <br /> 05/14/99 <50 <0 3 <03 <0 3 <05 <20 3964 NP 000 1480 -2394 <br /> 08/18/99 <50 <0 3 <03 <03 <05 <20 3846 NP 000 1480 -2366 <br /> 11/16199 7 500 920 12 240 450 <20 41 77 NP 000 1480 -2697 <br /> 02/09/00 190 11 084 1 5 2 <20 38 64 NP 000 14 80 2384 <br /> 05/17/00 140 06 <0 25 <0 25 07 56 41 72 NP 000 14 80 2692 <br /> 08/23/00 4200 3 100 99 <02 58 <06 3963 NP 000 14 80 2483 <br /> 11/15/00 <50 5 8 <02 <02 <04 <06 40 15 NP 000 14 80 2535 <br /> 02/14/01 <50 <03 <02 <02 <04 23 40 20 NP 000 14 80 -2540 <br /> 05/15101 <50 <03 <02 <02 <04 <06 4020 NP 000 1480 2540 <br /> 08115/01 <50 <03 <02 <02 <04 <06 4321 NP 000 1480 -2841 <br /> 11/06/01 99 24 28 1 2 2 J 13 57 46 15 NP 000 1480 -3135 <br /> 02/13/02 6 940 1 130 12 I 872 51 <60 43 06 NP 000 1480 -2926 <br /> 05/07/02 3 380 515 <50 <5 0 <10 <15 4340 NP 000 1480 -2861) <br /> 08/07/02 259 <0 08 <0 18 <017 <04 <0 07 4685 NP 000 1480 -3205 <br /> 11/13102 <50 <0 08 <0 18 <017 <04 <0 07 4942 NP 000 1480 -3462 <br /> 02/19103 <15 <0 22 <0 32 <0 31 <04 <018 4940 NP 000 14 80 3460 <br /> 05/14/03 <15 <0 22 <0 32 <0 31 <0 4 <018 4436 NP 000 14 80 -2956 <br /> 08112!03 <15 <0 22 <0 32 <0 31 <04 <0 18 48 52 NP 000 14 80 33 72 <br /> MONITORING WELL#TB-7 Screen Interval =25 to 75 feet <br /> 06/08/95 110 000 11 000 17 000 640 16 000 <br /> 08/16/95 83 000 15 000 9 500 l 250 13 000 6022 NP 000 93 68 3346 <br /> 11/13/95 92 000 19 000 23 000 l 700 9 800 - 6023 NP 000 9368 3345 <br /> 02/13/96 9,000 2 500 12 22 140 6024 NP 000 93 68 3344 <br /> 05/14/96 69 000 20 000 22 000 1 900 9 400 50 72 NP 000 1 93 68 4296 <br /> 08/28/96 84 000 16000 19,000 1 500 8 700 *1 500 53 80 NP 000 93 68 3988 <br /> 11/14/96 6 100 1 53 1 900 <6 1 000 *1 200 5262 NP 000 93 68 41 06 <br /> 02/12/97 SAMPLES LOST 48 80 NP 000 93 68 4488 <br /> 171 TAB i XLS Page 7 of 11 10/20/03 <br />