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Tab* <br /> Historical Groundwater Monitoring Data <br /> 7-Eleven Store No 20632 <br /> 4627 DaVmci Drive <br /> Stockton,California <br /> -well Ethyl- MTBE MTBE Dissolved <br /> IDI well ton t Benzene Toluene Benzene Xylene TPH-G 8020 8260 TBA DIPE ETBE TAME Oxygen DTW SPT WTE <br /> (TOC) Date (pg►L) (Pg/L) - (VgIL) fug/W (RSIL) (NglL) (Pgn-) (Ng/L} (Ng1L) (NglL) (pgtL) (mg1L) (feet) (feet) (feet) <br /> MW-2 cont _ 05/16100 - <5 _ <5 <5 <10 1,200 — 4,500 <5,000 <200 <200 <200 07 679 000 -397 <br /> - - 08/08/00 <0 5 <0 5 <0 5 <1 <100 -- 3,300 <2,500 <100 <100 <100 03 770 0 DD 488 <br /> 11/15/00 <50 <50 <50 <150 620 — 3,000 <2,500 <100 <100 <100 06 -T1 -To-0 <br /> MW-3_µm_ _ _ — 829 0 00 -547 <br /> 2 82 1 D/17197 2 fi _ 1 5 38 170 620 <5 0 — <br /> 03/22/98 ND 4 15 31 120 — ND ND ND ND ND 02 6 55 000 -373 <br /> 0611519$ <0 3 1 { 63 d 18 <1 — <10 <100 <5 <5 <5 1 0 672 0 00 -390 <br /> 08/25/98 0 6 <0 3 9 36 <0 6 <50 — <5 <50 <5 <5 <5 7 56 0 00 4 74 <br /> <0 3 154 2 39 86 <50 -- <5 <20 <5 <5 <5 0 4 7 65 0 00 -4 83 <br /> 12/29/98 <5 <5 0 7 6 04 000 -322 <br /> 02/17/99 <0 5 <0 5 27 <0 5 <50 <5 <5 <20 <5 <br /> <0 3 1 08 3 41 10 5 <50 — <5 <20 <5 <5 <5 09 730 0 00 4 48 <br /> 05121199 <0 6 50 <5 <20 <5 <5 <5 09 795 000 -513 <br /> 08/28/99 <D 3 <03 <03 — <5 <20 <5 <5 <5 13 770 000 -488 <br /> 11/24/99 <0 3' <0 3 <0 3 <06 95 88 fi <20 <5 <5 <5 12 656 000 -374 <br /> 02/02/00 <0 3 <0 3 <0 3 <0 6 <50 <5 6 49 <2 06 660 000 -378 <br /> 05/16/00 <5 49 640 2,000 9,500 _ <1 <50 <2 <2 <br /> 08108/00 <25 <25 340 110 4,100 — <1 <50 <2 <2 <2 06 760 0 DD -4 18 <br /> 11/15/00 5 6 <S 600 270 - <br /> <10 <500 <20 <20 <20 04 7 00 000 <br /> -4 18 <br /> 3,300 <br /> MW-4_c _ _ _ — 804 0 00 -546 <br /> 2 58 10/17/97 610 760 320 2,800 20,000 18,000 23,000 -- <br /> ND ND ND 0 3 6 27 0 00 -369 <br /> 03122198 81 66 32 27 ND <br /> 2,600 -- 26,000 <5, 00 <250 250 <250 2 1 647 000 -389 <br /> 06/15198 700 20 170 73 22,000 — 17,000 <br /> 08114198-Well Abandoned <br /> IVI -- - <20 <5 <5 <5 0 7 TOOO <br /> -322 <br /> 2 57 02117199 85 <1 30 110 890 49 62 <br /> 788 <20 <5 <5 <5 09 -443 <br /> 05/21/99 24 2 0 86 141 17 R 220 — <5 <5 0 8 -413 <br /> 08/28/99 366 <0 3 321 34829664 <20 <511/24/99 214 1 29 i42 149 257 259 281 <20 <5 <5 <5 1 1 <br /> Page 2 of 3 <br />