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TAE 1 <br /> GROUNDWATER DATA <br /> THRIFTY OIL STATION 9171,STOCKTON,CA <br /> DATE ANALYTICAL PARAMETERS DEPTH TO AEPTU TO PRODUCT CASING GROUNDWATER <br /> SAMPLED TPH-g BENZENE TOLUENE EthylBenzene XYLENE MTBE GROUNDWATER PRODUCT THICKNESS ELEVATION ELEVATION <br /> {ug/L) (ug/L) (U-a) (ag11} (ug/L) (uglL) (feet) (feet) (feet) (feet) (Feet) <br /> 05/24/05 <2 9 <0 32 <0 10 <0 24 <0 30 43 4474 NP 000 l4 63 30 I l <br /> 08/10/05 71 <0 32 <0 10 <0 24 <0 30 42 47 56 NP 000 14 63 -3293 <br /> MONITORING WELL#TB-11 Screen Intervals=S to 30 eet and 35 to 60 eet <br /> 02/25/99 <50 <0 3 <03 <0 3 <0 5 <20 38 05 NP 000 <br /> 05/14/99 - - - DRY - <br /> 08/18/99 DRY - <br /> MONITORING WELL#TB-12 Screen Intervals=5 to 30 eet and 35 to 60feet <br /> 02/25/99 4 400 49 0 81 <0 3 29 12,000 3970 NP 000 <br /> 05/14/99 - - DRY <br /> 08!18/99 1 - - - - DRY <br /> MONITORING WELL#EW-5S Screen Interval=40 to 60 eet <br /> 05!25105 59 300 1,860 3 740 3 260 18 800 924 4421 NP 000 <br /> 08/10/05 46 000 <32 <10 <24 14700 248 4604 NP 000 <br /> MONITORING WELL#EW-5D Screen Interval=65 to 95feet <br /> 05/25/05 72 100 3,120 7 600 2,020 19 000 417 4487 NP 000 <br /> 08/10/05 40 100 1930 1 350 <12 14 100 559 4743 NP 000 <br /> NOTE ND=Nondetectable 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 /> =Not analyzed 1 Not available Methyl-tert Butyl Ether(MTBE)analyzed by EPA method 8020 or 8260 <br /> MTBE by 8020 Beginning 8123100,BTEX and MTBE analyzed by EPA Method 8260B <br /> 171 TAB XLS Page 12 of 12 6/29/2005 <br />