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TAW 1 9 <br /> GROUNDWATER DATA ' <br /> THRIFTY OIL STATION #172, STOCKTON, CA <br /> DATE ANALYTICAL PARAMETERS DEPTH'l'O DEPTH TO PRODUCT CASINO GROUNDWATER <br /> SAMPLED TPH BENZENE TOLUENE EtbylBenzent XYLENE MTBE GROUNDWATER PRODUCT THICKNESS ELEVATION ELEVATION <br /> (ug(L) (ug/-) (UPS) (ug(L) (ug/L) (ug/w (feet) (feet) (feet) (fcet) (feet) <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-tent Butyl Ether(MTBE)analyzed by EPA method 8020 or 8260 <br /> On 8118100 and beginning 2/15/01 BTEX and MTBE analyzed by EPA Method 8260B <br /> 172TABI XLS Page 13 of 13 12/8/2005 <br />