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TABLE 1 - <br /> GROUNDWATER DATA <br /> THRIFTY OIL STATION#172, STOCKTON, CA <br /> DATE ANALYTICAL PARAMETERS DEPTH TO DEPTH TO PR00UCT CASING GROUNDWAT <br /> SAMPLED TPH BENZENE TOLUENE EthylBmene XYLENE MTBE GROUNDWATER PRODUCT THICKNESS ELEVATION ELEVATION <br /> (UgIL) { ) (UPI) (4w`L) OgfL) (tlg(l) (feet) (feet.) (feet) (feet) (feet) <br /> W22/02 <br /> 08/141o2 <br /> 11/20/02 - - <br /> MONITORING WELL#VW 6B <br /> 02/18/99 1 400 60 20 <03 110 8200 3360 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 /> 08/16/01 DRY <br /> 11108101 <br /> 02/21/02 <br /> 05/22/02 <br /> 08/14/02 <br /> 11/20/02 <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-Cert 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 12 of 12 1219102 <br />