ARCHIVED REPORTS_XR0008044 CASE 1

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Table 1 Groundwater Elevation and Analytical Data Former BP Service Station No 11194 2375 Tracy Blvd, Tracy, CA TOC Depth to Water Level Ethyl- Total Well Date P! Elevation Water Elevation TPHg TPHd Benzene Toluene benzene Xylenes MtBE DO Number Sampled NP (feet msl) (feet bgs) (feet ms I) (pg1L) (pg/L) (pg1L) (pg/L) (pg1L) (jig/L) (pg/L) (mg1L) Comments MW-6 12/8/1992 2563 478 2085 — -- — — -- — Sheen 3/10/1993 -- 2563 4 23 2140 — _ __ __ .. Sheen 6/16/1993 - 2563 478 2085 - — — -- — Sheen 10/22/1993 -- 2563 494 2069 -- — - — — - -- Sheen 1/24/1994 2563 4 65 2098 4 700 -- 320 24 440 100 673 — 6/7/1994 -- 2563 511 2052 -- — -- -- — _ 9/13/1994 2563 571 1992 1/10/1995 2563 322 2241 3/23/1995 2563 386 21 77 10/4/1995 2563 533 2030 1/4/1996 2563 431 21 32 3/29/1996 -- 2563 417 2146 7/1/1996 2563 1 472 2091 10/15/1996 - 2563 499 2064 4/16/1997 -- 2563 363 220G 10/15/1997 — 2563 480 2083 3/17/1998 -- 2563 440 21 23 - 3/17/1998 -- 2563 511 2052 1/6/1999 — 2563 473 2090 31,000 - 220 ND<50 820 150 13,000 — 9/13/1999 - 2563 499 2064 11 000 — 50 54 420 83 14 -- 1/19/2000 2563 437 21 26 33,000 — 100 72 1,100 56 3 600 -- 4/12/2000 - 2563 575 1988 26,000 — 310 58 710 130 480 7/22/2000 - 2563 508 2055 300 000 210 ND<75 1 700 1 100 1 300 -- 10l2612000 -- 2563 475 2088 220 000 580 400 1,400 1 600 1,800 1/17/2001 2563 - 4/12/2001 — 2563 458 2105 13,000 -- 178 57 419 165 528 -- 5/23/2001 2563 480 2083 17,000 -- 259 117 515 272 159 7/31/2001 2563 472 2091 14 000 — 186 458 346 942 301 10/30/2001 2563 4 79 2084 13 000 202 ND<25 100 ND<75 165 1/29/2002 2563 425 2138 12,000 256 836 145 269 344 - 4/30/2002 - 2113 461 2102 8 800 116 ND,12 5 548 ND<25 166 - 7/30/2002 2563 j - I - _ - -- — -- Parked Over-Not Sampled 10/31/2002 P 2563 1 490 2073 44,000 - 270 1,200 510 2 100 1,800 -- Report Date July 13,2004 Page 20 of 25