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TAW I <br /> GROUNDWATER DATA <br /> THRIFTY OIL STATION##172, STOCKTON, CA , <br /> DATE ANALYTICAL PARAMETERS DEPTH TO DEPTH TO PRODUCT" CASING GROUNDWATEE <br /> SAMPLED TPH BENZENE TOLUENE Ethyilleaxene XYLENE MTBE GROUNDWATER PRODUCT THICKNESS ELEVATION ELEVATION <br /> (119(L) tum) (um) (OA) (ugfL) (*L) &00 (fejt) (feet) (feet) (fed) <br /> 08/18/99 DRY = <br /> 11/10/99 <br /> 02123/00 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 /> 05/22/02 <br /> 08/14/02 <br /> 11/20/02 <br /> 02/12/03 <br /> 05/21/03 <br /> NOTE ND=Nondetectable <br /> =Not analyzed J 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 2/15101 BTEX and MTBE analyzed by EPA Method 8260B <br /> 172TABi XLS Page 13 of 13 6/1&/03 <br />