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i <br /> TABLE 2A <br /> GROUNDWATER DATA <br /> THRIFTY OIL STATION 4171,STOCKTON,CA <br /> DATE ANALYTICAL PARAMETERS DEPTH TOFDETf? PRODUCT CASING GROUNDWATER <br /> SAMPLED TPH g BENZENE TOLUENE EthylBegzene XYLEM MTBE GROUNDWATERCT THICKNESS ELEVATION ELEVATION <br /> (° L) (u8 ) 4� L1 fu 3 (u L) (ugfL) ice) (teat) (feet) {feet} <br /> 03/31/05 67 600 2 954 8 250 1 920 11 200 <0 la NP 000 <br /> EXTRACTION HWLL#EW SS Screen interval=44 to OO eet <br /> 04706105 1 85 904 1 1 440 7 560 2 010 l0 804 3 420 NP 0 00 <br /> NOTE ND=Nondetectable Benzene toluene ethlybenzene and xylene analyzed by EPA method 8020 <br /> NP=No free hydrocarbon product Total petroleum hydrocarbons(TPH)anal}zed by FPA method 8015 modified for gasoline <br /> =Not analyzed I Not available Methyl cert Butyl Ether(MTBE)anaiyzed by EPA method 8020 or 8260 <br /> • =MTBE by 8020 Beginning 8123/00 BTEX and MTBE analyzed by EPA Method 8264E <br /> Page 12 of 12 <br />