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CIW) ®W® ® (W ® ® ® CD am FAW ® Am W <br />`t <br />{ <br /> r <br /> Table 2 <br /> Historical Groundwater Monitoring Data <br /> u <br /> i 7-Eleven Store No 20632 <br /> 4627 DaVinci Drive <br /> Stockton, California <br /> Well IDI Ethyl- MTBE MTBE Dissolved <br /> Elevation Benzene Toluene Benzene Xylene TPH-G 8020 8260 TBA DIPE ETBE TAME Oxygen D7W SRT IIUTE <br /> (TOC) Date (Ng/L) (pg/L) (Ng/L) (Ng/L) (wg/L) (ug/L) (4rg/L) (Ng/L) (ug/L) (Ng/L) (pgIL) (mgIL (feet) (feet) (feet) <br /> MW-2 <br /> 282 10/17197 <0 5 <0 5 <0 5 <0 5 440 1,800 2,300 - - - - -- 83 0 00 -5 55 <br /> 03/22/98 ND ND ND 078 ND 2,000 ND ND ND ND 02 661 000 -379 <br /> 06/15/98 <03 <0 3 <0 5 <0 6 1,300 - 1,600 <2,000 <100 <100 <100 15 684 000 -402 <br /> 08/25/98 06 <0 3 <0 5 <06 1,550 - 1,610 <2 000 <200 <200 <200 - 770 000 -488 <br /> 12/29198 <0 3 <0 3 <0 3 <0 6 2,130 - 5,280 <800 <200 <200 <2,000 04 776 000 -494 <br /> 02/17/99 <0 5 <0 5 <0 5 <6-5 770 3,300 4,900 <1,000 <250 <250 <250 09 613 000 -331 <br /> 05121199 385 <1 5 <1 5 <3 1,180 -- 5,340 <400 <100 <100 <100 08 737 000 -456 <br /> 08/28/99 <0 3 <0 3 <0 3 <0 6 2,100 - 5,130 <800 <200 <200 <200 08 795 000 -513 <br /> 11/24199 04 288 <0 3 177 3,490 5,830 7,450 <800 <200 <200 <200 18 785 000 -503 <br /> 02/02/00 <0 3 <0 3 <0 3 <06 2,010 4,000 407 2,090 <10 <10 <10 10 695 000 -413 <br /> 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 03 770 000 -488 <br /> 11/15/00 <50 <50 <50 <150 620 -- 3,000 <2,500 <100 <100 <100 06 710 000 -428 <br /> 02/07/01 <0 5 <0 5 0 V <1 5 660 - 1,800 <1,200 <50 <50 <50 09 699 000 -4 17 <br /> 05/23/01 <0 5 <0 5 <05 <1 640 2,100 <2,500 <100 <100 <100 10 730 000 -448 <br /> 08/21/01 1 11 069 1 940 - 2,800 <2,500 <100 <100 <100 0 4 785 000 -503 <br /> 11/05/01 21 74 34 13 680 6,600 <2,000 <500 <500 <500 1 1 780 000 -498 <br /> 01/09/02 <5 <5 <5 <5 2,630 -- 8,950 <20 <5 <5 9 10 532 000 -250 <br /> E 04/10/02 <1 <1 <1 <1 <100 2,200 1,900 <620 <62 <62 <62 10 730 000 -448 <br /> MW-3 <br /> 282 10/17/97 26 16 38 110 620 <5 0 -- -- -- - - - 829 000 -547 <br /> 03/22/98 ND 4 15 31 120 -- ND ND ND ND ND 02 655 000 -373 <br /> 06/15198 <0 3 11 63 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 3 154 239 86 <50 -- <5 <20 <5 1 <5 <5 04 1 765 1 000 -483 <br /> 02/17/99 <0 5 <0 5 27 <0 5 <50 <5 <5 <20 <5 <5 <5 07 604 000 -322 <br /> 05121/99 <03 1 08 341 105 <50 - <5 <20 <5 <5 <5 09 7 30 0 00 4 48 <br /> I <br /> 7-11120632 tbl As 2 of 4 05-31-02 <br />