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• TAR 1 s <br /> GROUNDWATER DATA <br /> THRIFTY OIL STATION#172, STOCKTON, CA <br /> DATE ANALYTICAL PARAMETERS DEPTH TO DEPTH TO PRoDucr CASING [GROUNDWATER <br /> SAMPLED TPH SELENE TOLUENE EthylBenaene XYLENE MTBE GROUNDWATER PRODUCT THICKNESS ELEVATION ELEVATION <br /> (Ugf ) (off) (ug/L) (ag/L) (UA) (.WL) (feet) (feet) [fe t (feet) <br /> 05117/01 - <br /> 08/16/01 DRY <br /> NOTE ND=Nondetectable <br /> =Not analyzed/Not available 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 /> "•"=MTBE by 8020 or 8020/8260 Methyl tert Butyl Ether(MTBE)analyzed by EPA method 8020 or 8260 <br /> On 8118100 and beginning 2115101 BTEX and MTBE analyzed by EPA Method 8260B <br /> 172TABI XLS Page 11 of 11 9/13/01 <br />