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TABg1 • <br /> GROUNDWATER DATA <br /> THRIFTY OIL STATION#171, STOCKTON, CA <br /> DATE ANALYTICAL PARAMETERS DEPTH TO DEPTH TO PRODucr CASING GROUNDWATER <br /> SAMPLED- -'--TPH,-g BENZENE TOLUENE Ethyl$enzene XYLENE MTBE GROUNDWATER PRODUCT TWCI ESS ELEVATION ELEVA'nON <br /> ('&J ) _(.&') €4 €L CUBS? (uwl) (feet) (feet) [feet) (fret) (feet) <br /> 08/23/00 90 92 <02 <02 <04 563 3957 NP 000 1463 -2494 <br /> 11/15/00 <50 <03 <02 <02 <04 31 4350 NP 000 1463 -2887 <br /> 02/14/01 <50 3 8 J <02 <0 2 <04 14 39 75 NP 000 1463 -2512 <br /> 05/15/01 <50 <03 <02 <02 <04 43 39 75 NP 000 1463 -25 12 <br /> 08/15/01 <50 <03 <02 <02 <04 <06 4350 NP 000 1463 2987 <br /> 11106/01 <50 <03 <02 <02 <04 <06 45 75 NP 000 1463 -31 12 <br /> MONITORING WELL#TB-II <br /> 02/25/99 <50 <03 <03 <03 <05 <20 38_05 NP 000 - <br /> 05/14/99 - DRY <br /> 08/I8/99 DRY <br /> MONUMUNG WELL#TB-12 <br /> 02/25/99 44W 49 081 <03 29 12 000 3970 NP 000 <br /> 05/14/99 DRY <br /> 08/18/99 DRY <br /> NOTE ND=Nondetectable Benzene,toluene,ethlybenzene and xylene analyzed by EPA method 8020 <br /> NP=No free hydrocarbon product Total petroleum hydrocarbons(TPH)analyzed by EPA method 8015 modified for gasoline <br /> "=Not analyzed/Not available Methyl-tert Butyl Ether(MTBE)analyzed by EPA method 8020 or 8260 <br /> "•"=MTBE by 8020 Beginning 8123100 BTEX and MTBE analyzed by EPA Method 8260B <br /> 171 TAB1 XLS Page 9 of 9 12/12/01 <br />