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Table 1 �- Groundwater Monitoring I and Analytical Results 0 Tosco(Unocal) Ser�ce Station#5886 2701 West March Lane Stockton,California W>✓LL 1D1 DATE DTIV SIT, GWIE TP14-D TPH-G B E x MTBI� TOC*(#) (f1') ((i bgs) (nill) (ppb) (ppb) (ppb) (ppb) (,ppb) (ppb) (ppb) MW-2 08120-21/01 702 5 0-25 0 -732 <50 <50 <0 50 <0 50 <0 50 <0 50 3,70013,600' (cont) 09/13/01 699 -729 -- -- -- -- -- -- 1,700 10/19/01 702 -732 -- -- -- -- -- -- 2,600 11119-20/01 657 -687 -- <50 <0 50 <0 50 <0 50 <0 50 3,50014,000 12/13/01 6 18 -648 -- -- -- -- -- -- --16,5007 01/18/02 569 -599 -- -- -- -- -- 7,200 02/11-12/02 622 -652 -- <1,000 <10 <10 <10 <10 4,800/4,6007 03/21/02 605 -635 -- -- -- -- -- -- 150 05/02-03/02 6 15 -645 -- <50 <0 50 <0 50 <0 50 <0 50 41128' 08/01-021022° 658 -688 -- <100 <10 <10 <10 <2 0 200 1 1/20-211022° 643 -673 -- <250 <2 5 <2 5 <2 5 <5 0 290 02/20-21/0320 623 -653 -- <50 <0 50 <0 50 <0 50 <1 0 28 MW-3 -0 14 09/06/96 8 16 5 0-25 0 -830 -- -- -- -- -- "" 09/09/96 810 -824 1301 ND ND ND ND ND 4,100 12/06/96 669 -683 68 ND ND ND ND ND 660 03/07/97 598 -6 12 120; ND ND ND ND ND 16,000/20,000 -065 05/02/97 660 -725 1204 ND 32 ND ND ND 7,900/8,0007 09/02/97 856 -921 ND ND ND ND ND ND 2,100 12/01/97 705 -770 ND NDR NDR NDR NDA NDR 1,700 03/25/98 526 -591 ND NDR NDR NDR NDR NDA 8,20018,5007 06/17/98 608 -673 ND NDR NDA NDA NDR NDR 6,200/7,3007 09/01/98 687 -752 '78/ND' ND ND ND ND ND 6,70014,5007 12/03/98 633 -698 ND" NDR NDA NDR NDR NDR 4,400/5,0007 03/01/99 555 -620 NDR ND ND ND ND ND 27,000/31,0007 -014 " 04/19/99 607 -621 -- -- -- -- — -" 06/01-02199 673 -687 ND NDR NDA NDA NDA NDA 36,000/36,0007 08116-17/99 693 -707 1273/ND6 NDR NDR NDR NDA NDR 20,000117,0007 11/29-30/99 684 -698 1278/ND6 NDA NDR NDR NDA NO 16,000/21,0007 02/28-29/00 469 -483 1458/ND6 ND ND NI) ND ND 41,000/42,000' 05/10-11/00 606 -620 9223/80269 NDR NDR NDA NDA NDR 16101,0001122,0007 5886 xis/41801 37 3 As of 02/21/03