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mm m ow <br /> TaA <br /> Historical Groundwater Monitoring Data <br /> 7-Eleven Store No 20632 <br /> 4627 DaVinci Drive <br /> Stockton, California <br /> Well Ethyl- MTBE MTBE Dissolved <br /> ID/Elevation Benzene Toluene Benzene Xylene TPH-G 8020 8260 TBA DIPE ETBE TAME Oxygen DTW SPT WTE <br /> (TOC) Date (pg/L) (pg/L) (Iig/L) (pg/L) (IJgIL) (NgIL) (NglL) (pg/L) (pg/L) (tig/L) (pg/L) (mg/L) (feet) (feet) (feet) <br /> MW-2 cont 05/16/00 <5 <5 <5 <10 1,200 -- 4,500 <5,00 <200 <200 <200 07 679 000 -397 <br /> 08/08/00 --70-5— <0 5 <0 5 <1 <100 3,300 <2,500 <100 <100 <100 03 770 000 -488 <br /> 50 <br /> 11115100 <50 <50 c <150 620 — 3,000 <2,500 <100 <100 <100 06 710 000 -428 <br /> 02107!01 <0 5 <0 5 0 6* <1 5 660 — 1,800 <1,200 <50 <50 <50 09 699 000 -699 <br /> MW-3 <br /> 2 82 10/17/97 2 6 1 5 38 110 620 <5 0 -- — — -- -- -- 829 000 -547 <br /> 03/22/98 ND 4 15 31 120 -- NO ND ND NO ND 02 655 000 -373 <br /> 0611519$ <br /> <0 3 1 1 5 3 18 <1 -- <10 <100 <5 <5 <5 10 672 000 -390 <br /> 08/25/98 06 <0 3 936 <0 6 <50 -- <5 <50 <5 <5 <5 — 756 000 -474 <br /> 12/29/98 <0 3 164 239 86 <50 -- <5 <20 <5 <5 <5 04 765 000 -483 <br /> 02!17199 <0 5 <0 5 2 7 <0 5 <50 <5 <5 <20 <5 <5 <5 07 604 000 -322 <br /> 05/21/99 <0 3 108 —341 105 <50 — <5 <20 <5 <5 <5 09 730 000 -448 <br /> 08/28/99 <0 3 <0 3 <0 3 <D 6 50 — <5 <20 <5 <5 <5 09 795 000 -5 13 <br /> 11/24/99 <0 3 <br /> <D 3 <0 3 <06 95 896 <5 <20 <5 <5 <5 1 3 770 000 -488 <br /> 02!02100 <D 3 <0 3 <0 3 <0 6 <50 <5 6 49 <20 <5 <5 <5 12 656 000 -374 <br /> 05!16(00 <5 49 640 2,000 9,500 — <1 <50 <2 <2 <2 0 6 6 60 0 QO -3 78 <br /> 08/08/00 <2 5 <2 5 340 110 4,100 -- <1 <5D <2 <2 <2 0 6 7 60 0 OD -4 78 <br /> 11115!00 66 <5 500 270 3,300 -- <1D <500 <20 <ZO <20 0 4 7 00 0 00 -4 18 <br /> 02107!01 9 8 <2 5 160* 75 1,700 -- <1 0 <50 <2 <2 <2 07 687 000 -687 <br /> MW-4 <br /> 2 58 10/17/97 610 760 320 2,800 20,000 18,000 23,000 — — — -- 6 04 0 00 -5 46 <br /> 03ND 03 627 000 -369 <br /> /22/98 81 5 6 32 27 2,64D -- 26,000 NO NO NO <250 2 1 647 000 -389 <br /> 06/15/98 700 20 WO 73 22,000 — 17,000 <5,000 <250 <250 <br /> 08114/98-Well Abandoned <br /> MW-5 <5 07 579 000 -322 <br /> 257 02/17/99 85 <1 30 110 890 49 62 <20 <5 <5 <br /> D5121l99 242 086 141 172 220 -- 188 <20 <5 <5 <5 09 700 000 -443 <br /> 08/28/99 366 <0 3 321 348 296 64 <20 <5 <5 <5 0 8 6 70 0 00 -4 13 <br /> 11!24199 21 4 1 29 14 2 1 49 257 25 9 281 <20 <5 <5 <5 1 1 7 50 000 -493 <br /> 02/02/00 296 <0 3 266 063 284 35 3 751 <20 <5 <5 <5 1 1 6 50 000 -393 <br /> 05116!00 <0 5 <0 5 0 99 <br /> <1 <100 -- 160 <100 <4 <4 <4 06 6 3! 000 -380 <br /> 08108!00 2 8 <0 5 4 4 2 2 <100 — 160 <120 <5 75 <5 04 7 3� 000 -478 <br /> 11!15/DD 2 9 <0 5 3 6 2 8 170 — 59 <50 <2 <2 <2 0 6 6 75 000 -418 <br /> 02/07/01 <0 5 <05 0 72* <1 5 <100 — 24 <50 <2 <2 <2 07 660 000 -660 <br /> 7-11/20632 tbl xls 2 of 3 3-26-01 <br />