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Table 1 <br /> Groundwater Elevation and Analytical Data <br /> Former BP Retail Site No 11194 <br /> 2375 Tracy Blvd, Tracy, CA <br /> TOG 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 msi) (pg/L) (pg/L) (i►g/L) (pg/L) (pg/L) (pglL) (pg1L) (mg1L) Comments <br /> --WW-4 12/10/1991 25 90 5 43 20 47 1,300 -- 100 14 62 110 <br /> 3/25/1992 — 25 90 4 89 21 01 1,400 — 500 40 210 320 <br /> 6/25/1992 -- 2590 711 1910 — — - -- — 0 40 ft free product <br /> 12/8/1992T <br /> 5 90 5 39 20 51 _ present,[a] <br /> - -- — Sheen <br /> 3/10/19935 90 4 95 20 95 -- -- -- — — Sheen <br /> 6/16/1993 5 90 5 47 20 43 — — - - — Sheen <br /> 10/22/1993 -- 25 90 5 50 20 40 -- - - — Sheen <br /> 1/24/1994 — 2590 554 20 36 6,900 88 16 130 340 582 _ <br /> 6/7!1994 -- 2590 598 1992 23,000 -- 210 30 720 1,200 138 32 <br /> 9/13/1994 -- -- .- -- 5 600 -- 21 13 220 500 — -- QC-1 <br /> 9/13/1994 — 2590 483 2107 5,100 — 86 1 280 510 _ —62 <br /> 9!1311994 -- 25 90 6 42 19 48 9 000 15 240— 20 550 68 7 <br /> 1/10/1995 -- — 2,300 - 74 1 220 380 — QC-1 <br /> 3/23/1995 — 25 90 4 72 j1_2—5 -- — -. .. -- -- -- -- 0 09 ft free product <br /> 10/4/1995 -- 25—90 ---594 2007 — _ present,[a] <br /> -- -- '- -- -- -- 0 14 ft free product <br /> 11411996 -- 25 90 5 12 2D 78 1,700 __ present,[a] <br /> 27 2 5 36 58 25 0 8 <br /> 3/29/1996 -- 25 90 4 97 20 93 7 6 1,300 — ND<i 36 32 ND<10 24 <br /> 711/1996 -- 25 90 5 57 20 33 11,000 _ 160 49 590 836 ND<100 4 <br /> 10/15/1996 — -- -- -- 1,100 — 22 ND<5 0 75 85 ND<50 4 7 QG1 <br /> 10/15/1996 -- 2590 5 77 —2013 2,100 -- 39 ND<10 160 190 ND<100 47 <br /> 4/16/1997 25 90 5 33 20 57 5 000 - 173 ND<5 0 775 767 131 37 <br /> 10/15/1997 2590 571 2019 510 — 29 ND<1 0 91 63 6 25 7 3 <br /> 3/17/1998 - 25 90 4 87 21 03 890 — 36 ND<1 0 51 88 620 6 3 <br /> 1/6/1999 2590 542 2048 4,100 -- 11 19 180 110 84 <br /> 9/13/1999 2590 562 2028 2,400 42 65 89 21 330 _ <br /> 1/19/2000 -- 2590 515 2075 5,200 -- 7 2 ND<0 5 93 37 29 <br /> 4/12/2000 -- 25 90 5 80 20 10 8,300 -- 7 1 5 5 200 61 55 _ <br /> 7/22/2000 — 25 90 5 67 20 23 2 900 — 8 1 2 8 63 19 46 <br /> 10/26/2000 25 90 5 20 2D 70 2,000 -- 1 6 ND<0 5 27 24 23 _ <br /> 1/17/2001 -- 2590 535 2055 820 — 949 1 35 587 135 401 _ <br /> 4/12/2001 -- <br /> 2590 5 3520 55 1,600 — 14 556 786 113 556 <br /> Report Date October 13,2005 <br /> Page 18 of 28 <br />