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TAB 1 _ <br /> GROUNDWATER DATA <br /> THRIFTY OIL STATION#172, STOCKTON, CA <br /> DATE ANALYTICAL PARAMETERS DEPTH TO DEPTH TO PRODUCT CASING JGROUNDWATE - <br /> SAMPLED TPH BENZENE TOLUENE Ethyl[Benzeae XYLENE MTBE GROUNDWATER PRODUCT THICKNESS ELEVATION ELEVATION <br /> (ug/L) (ug1L) fug/L) (ug/t-) (uta) ()gtl.) Meet) (feet) Geer) (feet) (feet) <br /> MONITORING WELL#V'Fi'-bB <br /> 02/18/99 1 400 60 10 <03 110 8200 33 60 NP 000 <br /> 05/20/99 - - - _ <br /> 08/18/99 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 /> 08116/01 DRY <br /> 11108!01 <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 begmmng 2115/01 BTEX and MTBE analyzed by EPA Method 8260E <br /> I <br /> I i <br /> 172TAB I XL S Page 11 of 11 12/13/01 <br />