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• • <br /> TABLE 2A <br /> GROUNDWATER DATA <br /> THRIFTY OIL STATION##171,STOCKTON,CA <br /> DATE ANALYTICAL PARAMETERS DEPTH TO DEPTH TO PRODUCT CASING GROUNDWATER <br /> SAMPLED TPN g BENZENE TOIAJI:NE EthylBemut, XILENE I MTBE GROUNDWATER PRODUCT THICKNESS ELEVATION ELEVATION <br /> (ug/L) (U910 0-0 (feet) (feet) (feet) (feet) <br /> 08/17/04 <15 <0 22 <0 32 <0 31 <0 4 1018 5272 NP 000 1647 -3625 <br /> 11/23/04 180 12 c0 32 <0 31 <0 4 <0 18 53 47 NP 000 1647 1700 <br /> 02/09/05 <15 <0 22 <0 32 <0 31 <04 <0 18 5064 NP 0 00 16 47 34 17 <br /> MONITORING WELL#TB-1 Screen Istervud=40 to 70 feet <br /> 06!08195 15 000 3 600 <25 <25 550 <br /> 11/13/95 16000 4 800 57 340 140 59 86 NP 000 9334 3348 <br /> 02/13/96 130 27 ND ND ND - 59 88 NP 000 93 34 33 46 <br /> 05/14/96 15 000 5 500 48 38 590 5025 NP 000 93 34 43 09 <br /> 08/28/96 5 500 1000 69 170 130 •37 5360 NP 000 9334 3974 <br /> 11/14/96 <50 <0 3 <0 3 056 <0 5 5253 NP 000 93 34 4081 <br /> 02/12/97 SAMPLES LOST 49 10 NP 000 93 34 4424 <br /> 05/14/97 <50 It 14 0 74 16 •<20 51 81 NP 000 93 34 41 53 <br /> 08/13/97 150 <0 3 <0 3 15 <0 5 <20 <br /> 11/13/97 12 000 3 600 95 1,100 l 100 <20 51 40 NP 000 93 34 41 94 <br /> 02/11198 <50 <0 3 049 053 —788 <20 4820 NP 000 9334 45 14 <br /> 05/28/98 100 <0 3 <0 3 <0 3 <0 5 <20 5020 NP 000 9334 43 14 <br /> 08112!98 110 <0 3 <0 3 <0 3 <0 5 <20 40 70 NP 000 9334 5264 <br /> 11/10/98 <50 045 066 <0 3 <0 5 <20 4835 NP 000 9334 4499 <br /> 02125/99 <50 <0 3 075 <0 3 072 <20 3920 NP 000 1480 -2340 <br /> 05/14/99 <50 <0 3 <0 3 <0 3 <0 5 <20 3864 NP 000 1480 23 84 <br /> 08/18/99 <50 <0 3 <0 3 <0 3 <0 5 <20 3846 NP 000 1480 2366 <br /> 11/16/99 7 500 920 12 240 450 <20 41 77 NP 000 1480 -2697 <br /> 02/09/00 190 11 094 1 52 <20 38 64 NP 000 14 80 2384 <br /> 05/17/00 140 06 <0 25 <0 25 07 56 1 41 72 NP 000 1480 2692 <br /> 08/23/00 4200 3 100 99 <0 2 58 <0 6 3963 NP 000 1480 2483 <br /> 11/15/00 <50 58 <0 2 <0 2 <04 <0 6 40 15 NP 000 1480 -25 35 <br /> 02/14/01 <50 <0 3 <0 2 <0 2 <0 4 2 3 4020 NP 000 1480 -2540 <br /> 05/15/01 <50 <0 3 <0 2 <02 <0 4 <0 6 4020 NP 000 1480 2540 <br /> 08115/01 <50 <0 3 <0 2 <0 2 <04 <0 6 43 2l NP 000 E4 80 2841 <br /> 11/06/01 99 24 28 2 2 J 13 5 7 46 15 NP 000 1480 3135 <br /> 02/13/02 6 940 l 130 12 J 872 5 7 <6 0 4306 NP 000 1480 2826 <br /> 05/07/02 3 380 515 <50 <5 0 <10 <15 43 40 NP 000 1480 2960 <br /> 08/07/02 259 <0 08 <018 <017 <0 4 <0 07 4685 NP 000 1490 3205 <br /> 11113102 <50 <0 08 <0 18 <017 <0 4 <0 07 4942 NP 000 14 80 3462 <br /> 02/19/03 <15 <0 22 <0 32 <0 31 <0 4 <0 18 4 4940 NP 000 1480 3460 <br /> 05/14163 <15 <0 22 <4 32 <0 31 <04 <0 18 44 36 NP 000 1480 -29 56 <br /> Page 7 of 12 <br />