ARCHIVED REPORTS_XR0008673 CASE 1

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TABLE 1-SUMMARY OF RESULTS OF GROUNDWATER SAMPLING BP OIL COMPANY SERVICE STATION NO 11194 2375 TRACY BOULEVARD,TRACY,CALIFORNIA ALISTO PROJECT NO 10-085 WELL DATE OF CASING DEPTH TO PRODUCT GROUNDWATER TPH-G B T E X MTBE DO LAB ID SAMPLING/ ELEVATION (a) WATER THICKNESS ELEVATION (b) (ug1A) (ugA) (ugA) (ugA) (ugA) (ugA) (ppm) MONITORING (Feet) (Feet) (Feet) (Feet) AMW-3 08/10/90 2529 746 – 1783 90 06 41 28 21 — — SUP AMW-3 08/27/90 2529 746 -- 1783 -- -- -- -- _– — — — AMW-3 11/02/90 2529 -- – — AMW-3 11/05/90 2529 758 – 1771 ND<50 ND<O 3 ND<O 3 ND<O 3 NI?<0 3 - – SUP AMW-3 02/25/91 2529 703 - 1826 ND<50 ND<O 3 ND<O 3 ND<O 3 ND<0 3 – — SUP AMW-3 06/27/91 25 29 760 --- 1769 ND<50 ND<O 5 ND<O 5 ND<0 5 ND<0 5 – -- CHR AMW-3 09/25/91 25 29 792 — 1737 ND<30 ND<0 30 ND<0 30 ND<0 30 ND<O 30 – – SEQ AMW-3 12/10/91 2529 756 --- 1773 ND<30 ND<0 30 ND<0 30 ND<0 30 ND<O 30 --- --- SEQ AMW-3 03/25!92 2529 716 --- 1813 ND<30 ND<0 30 ND<0 30 ND<0 30 ND<O 30 — — SEQ AMW-3 06/25/92 2529 805 – 1724 ND<30 ND<0 30 ND<0 30 ND<0 30 ND<O 30 -- — SEQ AMW-3 12/08/92 2529 737 - 1792 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<0 5 — – ANA AMW-3 03/10/93 2529 709 1820 ND<50 ND<0 5 ND<O 5 ND<O 5 ND<O 5 -- -- PACE AMW-3 06116!93 2529 721 — 1808AMW-3 101'22193 2529 744 – 1785 — AMW-3 01/24/94 2529 722 – 1807 ND<50 ND<0 5 ND<O 5 ND<O 5 ND<O 5 — – PACE AMW,3 06/07/94 2529 770 -- 1759 ND<50 ND<0 5 ND<0 5 ND<O 5 ND<O 5 34 PACE AMW-3 09/13/94 2529 764 -- 1765 -- — – --- — — AMW-3 01/10/95 2529 683 -- 1846 - – _ — — — AMW 3 03/23/9/5 2529 664 – 1865 ND<50 ND<0 50 ND<0 50 ND<O 50 ND AMW-3 10/04/95 2529 759 – 1770 - -- — — -- AMW-3 01/04/96 2529 710 – 1819 – -- – — AMW-3 03/29/96 2529 697 – 1832 ND<50 ND<O 5 ND<1 ND<1 ND AMW-3 07/01/96 2529 753 — 1776 --- -- — -- -- AMW-3 10/151% 2529 775 — 1754 --- — — — -- -- — — AMW-3 04/16/97 2529 635 -- 1894 — -- - — — — — AMW-3 10/15/97 2529 750 — 1779 -- — — - -- -- — — AMW-3 03/17/98 2529 709 — 1820 - --- — — — — -- — I 17-Apr-98 Page 1 i