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I <br /> Table 1 <br /> Groundwater Elevation and Analytical Data <br /> Former BP Retaff Site No 11194 <br /> 2375 Tracy Blvd, Tracy, CA <br /> TOC Depth to Water Level Ethyl- Total <br /> Well Date PI Elevation Water Elevation TPHg TPHd Benzene Toluene benzene Xylenes MtBE DO <br /> Number Sampled NP (feet msl) (feet bgs) (feet msl) WIL) (pg/L) (pg1L) (pg1L) (pg/L) (pg/L) (pg/L) (mglL) Comments <br /> MW-2 6/25/1992 -- 26 33 7 33 ---1-90-0 ND<30 — ND<0 30 ND<0 30 ND<0 30 ND<0 30 -- _ <br /> 12/8/1992 -- 2633 591 2042 61 -- ND<0 5 ND<D 5 ND<0 5 ND<0 5 <br /> 3/10/1993 -- 2633 569 2064220 — 35--06 5 7 92 _ .. <br /> 6/16/1993 - 2633 353 22 80 ND<50 -- ND<0 5 ND<0 5 ND<0 5 ND<0 5 <br /> 10/22/1993 -- — — 460 -- -09 0 7 14 08 1,700 — QC-1 <br /> 10/22/1993 — 26 33 --CO-6 2D 27 460 -- 1 0 6 14 08 1,600 -- <br /> 1/24/1994 -- 2633 563 2070 ND<50 ND<0 5 ND<0 5 ND<0 5 06 209 -- <br /> 6/7/1994 6 08 --2-0-2-5 ND<50 — ND<0 5 ND<0 5 ND<0 5 ND<0 5 ND<5 0 28 <br /> 9/13/1994 = 2633 636 1997 ND<50 — ND<0 5 ND<0 5 ND<0 5 ND<0 5 ND<5 0 81 <br /> 1/10/1995 2633 554 20 79 100 — 6 2 ND<0 5 12 — 52 <br /> 3123!1995 -- 2633 563 2070 ND<50 -- <br /> 053 ND<0 50 051 19 — 89 <br /> 10/4/1995 -- 26 33 637 1996 210 — ND<1 0 ND<1 0 ND<1 0 ND<2 0 840 71 <br /> 1/4/1996 -- 2633 590 2043 3,900 — ND<25 ND<25 ND<25 ND<50 12,000 3 <br /> 3/29/1996 -- -- — -- 11,000 — 37 9 4 5 13,000 -- QC-1 <br /> 3/29/1996 -- 2633 6 59 1974 9,200 — 34 9 3 4 12,000 T6- <br /> 26 <br /> 6 <br /> 7/1/1996 - 26 33 7 16 1917 5,200 -- 5 8 3 3 ND<i ND<1 10,000 31 <br /> 10/15/1996 -- 26 33 7 34 1$99 ND<25D — ND<2 5 ND<5 0 —4D—<-50 —RD—<-50 14,000 4 <br /> 4/16/1997 — 26 33 5 98 20 35 180 — ND<0 5 ND<1 0 ND<i 0 ND<1 0 57 <br /> 42 <br /> 10/15/1997 — -- — ND<50ffND <br /> ND<0 5 ND<l 0 ND<1 0 ND<l 0 120 -- QC-1 <br /> 10/15/1997 — 2633 608 20 25 ND<50 <0 5 ND<1 0 ND<i 0 ND<1 0 12D 54 <br /> 3117!1998 2633 557 2076 170 ND<0 5 ND<i0 ND<1 0 ND<1 0 180 61 <br /> 1/6/1999 — 2633 -- — -- <br /> 9/13/1999 - 2633 561 2072 480 — 35 73 ND<5 0 ND<5 0 99,000191,000 — <br /> 1/19/2000 — 26 33 5 61 2072 800 -- 11 ND<0 5 ND<0 5 12 84,000 _ <br /> 4/12/2000 — 2633 613 2D 20 1,600 — 42 ND<0 5 ND<0 5 ND<0 5 11,000 — <br /> 7/22/2000 -- 2633 —598 20 35 3,800 — 63 0 86 063 72 90,000 -- <br /> 10/26/2000 -- 26 33 501 2132 1,100 — 0 9 ND<0 5 ND<D 5 —069 3,400 — <br /> 1/17/2001 -- 2fi 33 514 21 19 18 000 109 ND<5 0 ND<5 0 ND<5 0 28,200 — <br /> 4/12/2001 — 2633 581 2052 700 -- ND<0 5 ND<0 5 ND<0 5 ND<1 5 946 -- <br /> 5/23/2001 — 2633 581 2052 1,100 - 0 594 ND<0 5 ND<0 5 ND<1 5 1,330 <br /> 7/31/2001 -- 2633 606 2027 1,600 — 203 ND<5 0 ND<5 0 ND<15 1,490 — <br /> 10/30/2001 — 2633 612 2021 420 — 113 575 462 232 363 <br /> 1/29/2002 -- 2633 557 2076 610 — 865 N:[)<7051—ND,0 5 ND<1 0 780 -- <br /> Report Date April 8, 2005 Page 13 of 27 <br />