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Table • <br /> Historical Groundwater Monitoring Results <br /> 7-Eleven Store#17334 <br /> 4501 North Pershing Avenue <br /> Stockton California <br /> Well ID/ Ethyl- MTBE MTBE Dissolved <br /> Elevation Benzene Toluene Benzene Xylene TPH-G TPH-D 8020 8260 TBA DIPE ETBE TAME Oxygen DTW SPT WTE <br /> (roc) Date (pg1L) (pg1L) (pg1L) (pglL) (pg1L) (pglL) (pglL) (pglL) (pglL) (pglL) (pglL) (pg1L) (mglL) (feet) (feet) (feet) <br /> Groundwater Grab Samples - <br /> GP3 02/20/97 21 <0 5 <0 5 065 930 1,700 — -- -- — -- — -- <br /> GP4 02/20/97 9,100 33,000 3,900 24,000 150,000 — 100,000 84,000 - -- -- -- -- -- -- -- <br /> GP7 02/20/97 <0 5 <0 5 <0 5 <0 5 <501 <5 — — -- -- -- -- <br /> Monitoring Well Samples <br /> MW-1 <br /> 7 34 12/19/97 1,200 1,100 580 11500 15,000 - 9,900 14,000 1 <4,000 <1,000 <1,000 <1,0001 02 1893 1000 -11 59 <br /> 03122/98 2,200 3,400 880 3,200 23,000 -- 11,000 <10,000 <5001 <500 <5001 0 2 1430 1000 -696 <br /> 06/15/98 5,000 7,200 1,700 8,800 52,000 - 21,000 <10,000 <500 <500 <5001 15 1443 000 -709 <br /> 08/25/98 -- -- -- -- -- -- -- -- -- — -- -- -- - -- <br /> Well destroyed 08/14/98 and replaced by MW-5A on 08/25/98 <br /> MW-1A. ' <br /> 7 26 12/19197 41 88 56 270 2,600 280 350 <100 <251 <25 <251 01 18 86 0 00 -1162 <br /> 03/22/98 15 61 13 65 560 - 360 <500 <25 <25 <25 02 14 23 0 00 -6 97 <br /> 06/15/98 8 5 89 084 63 <100 - - 31 <100 <5 <5 <5 18 1437 000 -711 <br /> 08/25/98 -- -- -- -- -- -- -- -- -- — -- — -- -- - <br /> Well destroyed 08/14/98 and replaced by MW-58 on 08/25/98 <br /> MW-2 <br /> 8 64 12/19/97 <0 5 <0 5 <0 5 <05 290 <50 <5 <5 <20 <5 <5 <5 0 1 19 89 0 00 -11 25 <br /> 03/22/98 ND 16 068 27 ND - <10 <100 <5 <5 <51 02 15251000 -661 <br /> 06/15198 <0 3 <0 3 <0 5 <06 <100 <10 <100 <5 <5 <5121 1548 000 -684 <br /> 08/25/98 0 363 111 2 54—129 170 <5 <50 <5 <5 <5 -- 1607 000 -743 <br /> 12129/98 <0 3 <0 3 <0 3 <0 6 <50 -- <5 <20 <5 <5 <5 0 7 16 70 0 00 -8 06 <br /> 02/17199 <0 5 <0 51 <0 5 <0 5 <50 - <5 <51 <20 <51 <5 <51 1 2 1584 000 -720 <br /> 05/21/99 073 065 <0 3 115 <50 - — <51 <20 <5 <5 <51 08 1576 -6-00 -7 12 <br /> 08/28/99 <0 3 <0 31 <0 3 <06 78 - <5 <51 <20 <5 <5 <5 0 9 1 1730 000 -866 <br /> 11/24/99 <0-3 <0 31 0 8 076 <50 <5 <51 <20 <51 <5 <5 27 1725 0 00 -861 <br /> 02/02/00 <0 3 <0 3 156 216 156 - <5 <5 <20 <5 <5 <5 13 1680 000 -816 <br /> 05/16/00 <0 5 <0 5 <0 5 <1 <100 - <11 <50 <2 <2 <2 0 5 14 95 0 00 -6 31 <br /> 08108100 <05 <0 5 <0 5 <1 <100 - <1 <50 <2 <2 <2 0 5 16 67 0 00 -8 03 <br /> Page 1 of 3 <br /> I <br />