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TAR I <br /> GROUNDWATER DATA <br /> THRIFTY OIL STATION#172, STOCKTON, CA <br /> DATE ANALYTICAL PARAMETERS DEPTff TO DEPTH TO PRODUCT CASING GROUNDWAj <br /> SAMPLED TPH BENZENE iOLUCk Ethyl�zene XYLENE MTBE GROUNDVVAfVU PRODUCT THICKNESS ELEVATION ELEVATION <br /> (UPS) (UZ(1.) (WO (ugly) (arm) ft/L) (feet) 00e0 (feet) (feet) (feet) <br /> 11/08/01 <br /> 02/21/02 <br /> MONITORING WELL#VW-6B <br /> 02/18/99 1,400 60 20 <03 110 8,200 33 60 NP 000 <br /> 05/20/99 - - - - - - <br /> 08118/99 - DRY <br /> 11/10/99 <br /> 02/23/00 DRY <br /> 05/10/00 DRY <br /> 08/18/00 DRY <br /> 11/09/00 <br /> 02/15/01 <br /> 05/17/01 <br /> 08/16/01 DRY <br /> 11/08/01 <br /> 02/21102 <br /> NOTE ND=Nondetectable <br /> =Not analyzed I 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 7115/01 BTEX and MTBE analyzed by EPA Method 8260B <br /> 172TAB I XLS Page 11 of 11 3114/02 <br />