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i <br /> TAS 1 — <br /> GROUNDWATER DATA <br /> THRIFTY OIL STATION #171, STOCKTON, CA <br /> DATE ANALYTICAL PARAMETERS DEPTH TO DEPTH TO PRODUCI" CASING GROUNDWATER <br /> SAMPLED TPII g BENZENE TOLUENE ElhylBenzene XYLENE MTBEGROUNDWATER PRODUCT THICKNESS ELEVATION ELEVATION <br /> (ug/L) t ? (u�) (feet) (feet) (feet) (feet) (feet) <br /> 11113/02 <SD <0 08 <0 18 <0 17 <04 3 2 5053 NP 000 15 84 34 69 <br /> 02/19/03 <15 <0 22 <0 32 <0 31 <04 <0 18 50 53 NP 000 15 84 -3469 <br /> 05/14/03 <15 <0 22 <0 32 <0 31 <04 <0 18 45 50 NP 000 15 84 2966 <br /> 08/12/03 90 <0 22 <0 32 <0 31 <04 <0 18 1 4952 NP 000 15 84 -3368 <br /> 11/24/03 <15 <0 22 <032 <0 31 <04 <0 18 51 26 NP 000 1584 3542 <br /> MONITORING WELL#TB-9 Screen Intervals =S to 30 tet and 35 to b/1feet <br /> 02/25199 <50 <03 <03 <0 3 <0 5 <20 3860 NP 000 <br /> � 05/14/99 - - DRY- _ <br /> 08/18199 DRY <br /> MONITORING WELL#TB-10 Screen Interval=20 to 70 eet <br /> 06/08/95 2 200 19 2 9 ND 12 - <br /> 11/13/95 6 000 92 18 14 15 5964 NP 000 93 16 33 52 <br /> 02/13/96 1 700 460 82 ND 57 59 66 NP 000 93 16 33 50 <br /> 05!14!96 1000 49 0 37 0 54 3 0 50 33 NP 000 93 16 42 83 <br /> 08/28196 1 500 I8 0 84 0 46 1 2 *24 53 15 NP 000 93 16 <br /> 4001 <br /> 11/14/96 120 <0 3 <0 3 <0 3 <0 5 *<20 52 18 NP 000 93 16 40 98 <br /> 0T 49 30 NP 000 93 16 4386 <br /> 2112!97 SAMPLES LOS <br /> 05114197 46 000 80 13 000 880 5 900 *<1 000 53 36 NP 000 93 16 39 80 <br /> 081[3197 49 000 8 400 14 000 35 6 400 60 - - <br /> 11/13/97 <50 <0 3 <0 3 <0 3 <05 <20 5160 NP 000 93 16 41 56 <br /> 02111!98 <50 <03 <03 <03 <0 5 40 47 9D NP 000 93 l6 45 26 <br /> 05/28/98 <50 <03 <03 <0 3 <05 50 5040 NP 000 93 16 4276 <br /> 08/12/98 <5D <0 3 <0 3 <0 3 <05 60 4125 NP 000 93 16 5191- <br /> 11/10/98 <50 <03 <03 <03 <05 58 5045 NP 000 93 16 42 71 <br /> 76 38 01 NP 000 1463 -2338 <br /> 02/25/99 <50 <03 <03 <0 3 <0 5 <br /> 05114!99 <50 <0 3 <0 3 <03 <05 <br /> 22 42 00 NP D 00 14 63 27 37 <br /> 08116!99 <50 <03 <03 <03 <05 <20 38 18 NP 000 1463 -2355 <br /> 11!16/99 250 0 31 <0 3 <0 3 <0 5 500 4054 NP 000 1463 <br /> 25 9l <br /> 02/09/00 240 <03 <03 <03 <05 480 4202 NP 000 1463 <br /> -27 39 <br /> 05/17/00 <50 <0 25 <0 25 <025 <0 5 492 4506 NP 000 1463 -3043 <br /> 08123!00 90 92 <02 <0 2 <04 563 39 57 NP 000 1463 -2494 <br /> 11!15100 <50 <0 3 <0 2 <0 2 <0 4 31 43 50 NP D 00 1463 <br /> -2887 <br /> 171TAB1 XLS Page 10 of 11 12/11/03 <br />