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Ta 1A <br /> Historical Groundwater Monitoring Results <br /> 7-Eleven Store#17334 <br /> 4501 North Pershing Avenue <br /> Stockton California <br /> well t131 Ethyl- MTBE MTBE Dissolved <br /> Elevation Benzene Toluene Benzene Xylene TAH-G TPH-D 8020 8260 TSA DIPE ETRE TAME Oxygen BTW SPT WTE <br /> rto} Date /L 1L 1t, 1L g/L 7L /L fL g/ gft iL gfL mgfL (feet) feet (feet) <br /> Groundwater Grab Samples <br /> GP3 10=0197 2.1 <0 51 <0 51 0-55 930 1,IOE3 <br /> GP4 02/20/97 9,100 33,000 3,900 24,000 1 150,000 —1100,0 0 84,000 <br /> GP7 102120197 <0 <0 5 <p 5 <0 51 <501, <br /> Monitoring Well Samples <br /> mW-1 <br /> 734 12/19197 1,200 1,100 580 1,500 15,000 -• 9,900 14,000 <4,000 <1000 <1,003 <,000 02 1893 000 -1159 <br /> 03/22/98 2,200 3,400 880 3,200 23,000 — -- 11,000 <10,000 <500 <500 <500 02 1430 000 -696 <br /> 0&115198 5,006 71200 1,700 8,800 52,400 - 2'1,006 <10,000 - WO <500 <500 15 1443 000 709 <br /> 08/25/98 — -- -- -- — -- -- -- — -- -- -- -- — -- <br /> ell destr4ysd 08/14198 80d replaced Icy MW-5A on t18f25JR8 <br /> IWW-1A <br /> 726 12119197 41 80 56 270 2,800 280 350 <100 <25 <25 <25 01 1888 0.00 -1162 <br /> 03/22/98 15 61 13 65 560 — 360 <500 <25 <25 <25 02 1423 000 -697 <br /> 05115198 $5 8 0 084 8.3 <1 Gb 31 o 00 <5 <5 <5 18 14.37 0 00 -711 <br /> 08/25/98 <br /> Wel E destr� ed 08114198 and replaced by MW 5B on 06125/98 <br /> MW-2 <br /> 864 12119197 <0 5 <0 5 <0 5 <0 5 290 <60 <5 <5 <20 <5 <5 <5 01 1989 000 -1125 <br /> 03/22/98 ND 16 068 27 ND -- <10 <100 <5 <5 <5 02 15 25 0 00 -661 <br /> 08/15198 50 3 <0 3 <0 5 <0 61 <100 <10 <i 00 <5 <51 <5 21 15 48 000 -6.84 <br /> 08/25/98 0 363 1 11 254 129 170 — <5 <50 <5 <5 <5 -- 1607 000 -743 <br /> 12129198 <0 3 <0 3 <0 3 <0 6 <50 <5 <20 <51 <5 <5 0 7 1670 000 -806 <br /> 02/17/99 <0 5 <0 5 <0 5 <0 5 <50 -- <5 <5 <20 <51 <5 <5 12 1584 000 -720 <br /> 05121199 0,78 0,65 <0 3 115. <50 <5 <20 <51 <5 <5 0$ 15,75 p 00 -712 <br /> 08/28/99 <0 3 <0 3 <0 3 <0 6 78 -- <5 <5 <20 <5 <5 <5 09 1730 000 -866 <br /> 11/24199 <0 3 <0 3 0.8 0,76 <50 <5 <5 <20 <5 <5 <51 27 1 1725 000 -8.81 <br /> 02/02/00 <0 31 <0 3 1 56 215 156 <5 <51 <20 <5 <5 <51 1 3 1680 000 -816 <br /> 05/16100 <0 5 <0 5 <0 5 <i <106 <1 450 <2 <2 <2 0 514 95 000 -6-3 <br /> 1 <br /> 08/08/00 <0 5 <0 5 <0 5 <1 <100 - - <1 <50 <2 <2 <2 05 1667 000 -803 <br /> 11114100 092 <0 5 <0 5 <1 5 <100 <1 <50 <21 <2 <2 06 <br /> 1690 0 06 1 -$25 <br /> 02/06/01 1 <0 5 <0 5 0 59* <1 <100 — <1 <50 <2 -715 <br /> <2 <2 1 0 1667 000 -803 <br /> 135123141 <0 5 <(3 5 <0 5 <1 <100 --T--35 <50 <2 <2 <2 0 8 15 99 0<00 <br /> 7-11/17334_tbl As 1 of 4 05-20-02 <br />