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• TA0 1 <br /> GROUNDWATER DATA <br /> THRIFTY OIL STATION #171, STOCKTON, CA <br /> DATE ANALYTICAL PARAMETERS DEP'T]H TO DEPTH TO PRODUCT CASING GROUNDWATER <br /> SAMPLED TPH-g BENZENE TOLUENE Ethyitienupe XYLENE MTBE GROUNDWATER PRODUCT` THICKNESS ELEVATION ELEVATION <br /> (ugfL) (ug/L) (� 1) (u€�-) (uP�) (:feet) (feet) (feet) (feet) I (fes)(ug/L) <br /> 02!14!01 <50 3 8 J <02 70 2 <04 14 3975 NP 000 1463 -25 12 <br /> 05!15101 <50 <d 3 <0 2 <0 2 <0 4 43 39 75 NP 000 1463 25 12 <br /> 08/15/41 <50 <0 3 <0 2 <0 2 <0 4 <0 6 43 50 NP 000 1463 28 87 <br /> 11/16!01 <50 <0 3 <0 2 <0 2 <0 4 <0 6 45 75 NP 000 1463 -31 12 <br /> NP 000 14 63 -2827 <br /> 02113!02 214 14 <02 <02 <04 114 4290 <br /> 05/07/02 <50 <03 <02 <0 2 <04 <06 4345 NP 000 1463 -2882 <br /> 08107102 <50 <0 08 <0 18 <017 <04 <0 07 4632 NP 000 1463 -31 69 <br /> 11/13/02 <50 <0 08 <0 18 <0 17 <04 75 4905 NP 000 1463 -3442 <br /> 02/19/03 <15 <0 22 <0 32 <0 3E <04 <0 18 4904 NP 006 1463 3441 <br /> 05!14/03 <15 <0 22 <0 32 <0 31 <04 <0 18 44 16 NP 000 1463 -2953 <br /> 05!12113 <15 <0 22 <0 32 <0 31 c0 4 <0 18 48 04 NP 000 1463 -3341 <br /> 11124!03 <l5 <0 22 <0 32 <0 31 <0 4 <D 18 4987 NP 000 1463 -3524 <br /> MONITORING WELL#T&11 Screen Intervals =5 to 30fee and 35 to feet <br /> 02125!99 <50 <03 <03 1 <U3 1 <U:) <20 38 OS NP 000 <br /> 05/14/99 - - DRY <br /> DAY <br /> 08/18/99 <br /> MONITORING WELL#TB-12 Screen Intervals =5 to 30 eet and 35 to 60feet <br /> 02!25199 4 400 49 081 <0 3 29 12 000 3970 NP 000 <br /> 05/14/99 - - - - DRY - <br /> 08/18/94 DRY <br /> DOTE ND=Nondetectable Benzene toluene ethlybenzene and xylene anal}zed 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 I Not avasiable Methy l ten Butyl Ether(MTBE)analyzed by EPA method 8020 or 8260 <br /> #"=MTBE by 8020 Beginning 8/23100 BTEX and MTBE analyzed by EPA Method 8260B <br /> 171 TAB XLS Page 11 of 11 12/19/03 <br />