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 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 msl) (pg/L) (pg/L) (pg/L) (pg/L) (pg/L) (pglL) (pg/L) (mg/L) Comments AMW-2 9/25/1991 2645 607 2038 ND<30 ND<O 30 ND<O 30 ND<O 30 ND<O 30 12/10/1991 2645 534 2111 ND<30 ND<O 30 ND<O 30 ND<O 30 ND<O 30 6/25/1992 2645 684 1961 ND<30 ND<O 30 ND<O 30 ND<O 30 ND<O 30 12/8/1992 2645 528 21 17 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 3/10/1993 2645 1 468 21 77 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 6/16/1993 2645 489 2156 -- - 10/22/1993 2645 538 21 07 - 1/24/1994 2645 506 2139 6/7/1994 - 2645 551 2094 ND<50 ND<O 5 ND<O 5 ND,O 5 ND<O 5 ND<5 0 35 9/13/1994 26 45 616 2029 1/10/1995 2645 472 2173 -- 3/23/1995 2645 440 22 05 62 ND<O 50 ND<0 50 ND<O 50 ND<1 0 97 10/4/1995 2645 592 2053 - _ 1/4/1996 2645 490 2155 __ _ 3/29/1996 2645 473 21 72 ND<50 ND<O 5 ND<1 ND<1 ND<1 ND<10 32 7/1/1996 2645 528 21 17 _ 10/15/1996 2645 549 2096 4/16/1997 2645 413 2232 10/15/1997 26 45 567 2078 3/17/1998 2645 5 23 21 22 -- 1/6/1999 2645 523 21 22 9/13/1999 2645 519 21 26 1/19/2000 2645 489 21 56 - T 4/12/2000 2645 509 21 36 7/22/2000 2645 549 2096 10/26/2000 2645 535 21 10 1/17/2001 2645 540 2105 - 4/12/2001 26415 515 21 30 5/23/2001 2645 5 31 21 14 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<1 5 ND<O 5 7/31/2001 - 2645 557 2088 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<1 5 ND<O 5 -- 10/30/2001 2645 1 548 20 97 ND<50 - ND<O 5 ND<O 5 ND<O 5 ND<1 5 ND<O 5 1/29/2002 2645 477 2168 ND<50 ND<O 5 ND<O 5 ND<0 5 ND<1 0 ND<O 5 4/30/2002 2645 513 2132 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<1 0 ND<O 5 Report Date December 1,2005 Page 3 of 29