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TA* 1 <br /> GROUNDWATER DATA <br /> THRIFTY OIL STATION #172, STOCKTON, CA <br /> DATE ANALYTICAL PARAMETERS DEPTH TO DEPTH TO PRODUCT CASING GROUNDWATEIR <br /> SAMPLED TPH BENZENE TOLUENE EthylBenzene XYLENE NITRE GROUNDWATER PRODUCE THICKNESS ELEVATION ELEVATION <br /> (ttgf[} (ug1L) (uglL) (ugP 0911) fail) (]feet) (feet) (fed) (feet) (feet) <br /> MONITORING WELL# VW-6A <br /> 02/18/99 1,200 42 21 <03 87 7 100 33 60 NP 000 <br /> 05/20/99 - - - - - - <br /> 08/18/99 DRY <br /> 11/10199 - - - - <br /> 02123l00 - 3526 NP 000 <br /> 05/10/00 DRY <br /> 08/18/00 3342 NP 000 <br /> 11/09100 - <br /> 02/15/01 <br /> 05/17/01 <br /> MONITORING WELL# <br /> 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 /> NOTE ND=Nondetectable <br /> ' '=Not analyzed/Not avaN[able 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 8/18/00 and beginning 2115101 BTEX and MTBE analyzed by EPA Method 8260B <br /> 172TABI XLS Page 10 of 10 8/13101 <br />