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Table 1 Groundwater Monitoring Data and Analytical Results Former Chevron Service Station#9-8632 575 Grant Line Road Tracy,California WELL ID/ TOC* GWE DTW TPA-D TPfl-Cx B T E X MTBE Tm DATE (A) (msl) (ji:) (ppb) (Ppb) (PFb) (ppb) (Ppb) (PPb) (ppb) (ppb) MW-1 (cont) 10/31/02'9 2638 1958 680 <50 <50 <0 5 <0 5 <0 5 <0 5 10 -- 01/30/03�9 2638 1923 715 <50 <50 <0 5 <0 5 <0 5 <0 5 13 -- 04/30/03" 2638 1996 642 <50 <50 <0 5 <0 5 <0 5 <0 5 17 -- MW-2 05/12/95 2693 2005 688 -- -- -- -- -- -- -- -- 09/07/95 2693 1940 753 190' 1,300 340 <2 5 55 13 -- -- 12/01/95 2693 1981 712 1,500' 13,000 3,800 <25 960 110 -- 02/07/96 2693 21 33 560 140' 120 30 <0 5 11 52 21 -- 05/07/96 2693 2003 690 690' 1,800 440 <2 5 170 15 480 -- 08/20/96 2693 19 12 781 100 1 5,100 1,600 <12 470 110 880 -- 11/05/96 2693 2013 680 280' 2,600 790 <10 250 34 310 01/07/97 2693 2097 596 77' 100 26 <0 5 62 068 85 -- 06/05/97 2693 2003 690 941 110 19 <0 5 86 <0 5 77 -- 09/02/97 2693 1958 735 350' 3,300 540 <5 0 390 67 560 -- 11/19/97 2693 2025 668 110' 110 17 <0 5 69 086 38 -- 02/12/98 2693 21 19 574 91 1 230 27 <0 5 10 25 52 -- 06/I0/98 2693 2050 643 140` 54,000 3,100 <50 2,900 480 1,600 -- 08/10/98 2693 19 83 710 250' 1,000 130 30 130 20 240 -- 11/24/98 2693 1989 704 1601 550 110 <2 5 58 16 260 -- 03/05/99 2693 2032 661 5481 104 12 <0 5 8 16 0 731 524 — 06/01/99 2693 2015 678 7531 832 109 <1 0 926 286 928 -- 08/30/99 2693 1978 7 15 110' 172 276 <0 5 274 335 143 -- 11/24/99 2693 2031 662 317 723 114 <1 0 102 226 270 -- 02/03/00 2693 1991 702 <50 <50 57 <0 50 <0 50 <0 50 671777 -- 06/26/00 2693 2024 669 598 2403 20 <0 50 25 27 160 — 08/11/00 2693 1965 728 <50 <50 074 <0 50 065 <0 50 250 -- 10/31/00 2690 2007 683 3306 898" 129 192 102 820 430 -- 02/22/01 2690 2027 663 1185 5723 505 <0 500 562 994 814 -- 05/25/01 2690 1998 692 756 6303 43 <0 50 130 98 140 07/31/01 2690 1965 725 <50 <50 <0 50 <0 50 <0 50 <0 50 140/1607 -- 9-8632 x 86855 9 A /30/D3