ARCHIVED REPORTS_XR0008047 CASE 1

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Table 1 Groundwater Elevation and Analytical Data Former BP Retail Site No 11194 2375 Tracy Blvd,Tracy, CA TOG Depth to Water Level Ethyl- Total Well Date P/ Elevation Water Elevation TPHg TPHd Benzene Toluene benzene Xylenes MtBE DO Number Sampled NP (feet ms]) (feet bgs) (feet msl) (Ng/L) (Erg/L) (pg/L) (u9/L) U19/L) Wg/L) WIL) (mg/L) Comments MW-5 10/20/1987 34,000 -- 50 ND<0 5 1,200 11/20/1987 -- - - 8,700 210 6,600 230 3/13/1988 2545 473 2072 -- - -- -- 3/23/1988 25 45 479 2066 6,200 - 420 5 - 600 6/7/1988 2545 485 2060 -- -- -- - - 10/18/1988 2545 545 2000 1,300 34 09 1 170 2/15/1990 - 2545 445 2100 1,900 220 21 330 250 4/26/1990 2545 465 2080 1 - - -- - -- 7/12/1990 2545 472 2073 4,400 140 9 4 130 300 8/27/1990 2545 515 2030 -- -- -- -- 11/2/1990 2545 520 2025 -- - -- - - -- 11/5/1990 2545 521 2024 7,500 430 55 760 1,600 2/25/1991 2545 429 21 16 2,400 160 5 9 120 96 6/27/1991 2545 534 2011 ND<50 67 ND<0 5 ND<0 5 ND<0 5 -- 9/25/1991 2545 574 1971 1,800 120 3 9 79 94 12/10/1991 2545 510 20 3b 720 46 34 38 58 3/25/1992 2545 432 21 13 550 75 033 4 32 - 6/25/1992 2545 -- - -- - 12/8/1992 2545 11 62 1383 3/10/1993 2545 1211 1334 ND<50 ND<O 5 ND<0 5 ND<0 5 ND<0 5 6/16/1993 2545 1013 1532 73 22 21 3 9 57 10/22/1993 2545 499 2046 ND<50 ND<O 5 ND<O 5 ND<0 5 ND<0 5 ND<5 0 - 1/24/1994 2545 891 1664 120 11 06 26 26 ND<5 0 6!7/1994 2545 638 1907 ND<50 - ND<0 5 ND<O 5 N0<0 5 ND<0 5 ND<5 0 9/13/1994 2545 599 1946 ND<50 N0<05 ND<0 5 N0<0 5 ND<0 5 ND<5 0 1/10/1995 2545 435 21 10 ND<50 N0<0 5 ND<0 5 ND<0 5 ND<1 3/23/1995 - -- - 620 20 25 55 53 - -- QC-i 3/23/1995 2545 419 2126 910 23 3 68 65 -- 79 10/4/1995 2545 541 2004 ND<50 22 ND<0 50 069 ND<1 0 78 69 1/4/1996 - 2545 462 2083 130 46 1 1 45 37 87 26 3/29/1996 2545 445 2100 490 - 27 ND<1 20 12 13 2 7 7/1/1996 2545 501 2044 580 35 5 30 13 11 37 10/15/1996 2545 523 2022 380 39 1 2 8 6 12 4 34 55 Report bate December 1,2005 Page 20 of 29