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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 /> 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) (pg/L) (ugIL) WL) WgIL) (ug1L) (ugIL) (pg/L) (mg/L) Comments <br /> MW-6 2/25/1991 -- 2563 410 2153 6,600 — 310 14 410 110 -- -- <br /> 6/27/1991 — 2563 509 2054 170,000 -- 260 61 140 370 — -- <br /> 9/25/1991 - 2563 560 2003 20,000 — 510 19 910 340 — — <br /> 12/10/1991 -- 2563 4 88 2075 7,500 — 170 69 350 60 — -- <br /> 3/25/1992 — 2563 428 2135 5 100 — 920 30 990 360 -- -- <br /> 6/25/1992 -- 2563 679 1954 -- - — -- -- — - — 0 87 ft free product <br /> present,[a] <br /> 12/8/1992 2563 478 2085 -- -- — -- -- - -- Sheen <br /> 3/10/1993 -- 2563 423 2140 -- — -- -- — — Sheen <br /> 6/16/1993 2563 478 2085 — -- -- — -- -- -- Sheen <br /> 10/22/1993 -- 2563 494 2069 -- -- -- — -- — Sheen <br /> 1/24/1994 2563 465 2098 4,700 -- 320 24 440 100_ 673 - <br /> 6/7/1994 -- 25 63 511 2052 -- -- _ — — _ _ <br /> 9/13/1994 -- 2563 571 1992 <br /> 1/10/1995 -- 2563 322 2241 <br /> 3/23/1995 — 2563 386 2177 <br /> 10/4/1995 -- 2563 533 2030 <br /> 1/4/1996 -- 2563 431 2132 <br /> 3/29/1996 -- 2563 4 17 2146 <br /> 7/1/1996 — 2563 472 2091 <br /> 10/15/1996 -- 2563 4 99 2064 <br /> 4/16/1997 -- 2563 363 2200 <br /> 10/15/1997 -- 2563 4 80 2083 <br /> 3/17/1998 2563 440 21 23 <br /> 3/17/1998 - 2563 511 2052 <br /> 1/6/1999 -- 2563 473 2090 31,000 -- 220 ND<50 820 150 13,000 — <br /> 9/13/1999 — 2563 4 99 2064 11,000 50 54 420 83 14 -- <br /> 1/19/2000 2563 437 2126 33,000 100 72 1,100 56 3 600 — <br /> 4/12/2000 - 2563 575 1988 26 000 — 310 58 710 130 480 - <br /> 7/22/2000 -- 2563 508 2055 300,000 -- 210 ND<75 1,700 1,100 1,300 -- <br /> 10/26/2000 — 2563 475 2088 220,000 - 580 400 1,400 1,600 1,800 - <br /> 1/17/2001 -- 2563 — — — -- -- _ _ — __ _ <br /> 4/12/2001 -- 2563 4 58 21 05 1 13 000 — j 178 57 419 165 528 — <br /> Report Date October 13, 2005 Page 22 of 28 <br />