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TABLE 1 SUMMARY OF GROUNDWATER MONITORING AND ANALYTICAL RESULTS Gardner Property,Thornton,CA Page 2 of 7 measured in feet MSL Re orted in u /I Well ID Date Wellhead Depth to G W Benzene Toluene Ethyl Xylenes TPHg MTBE Fuel Dissoved Eley Water Elev Benzene EPA 8020) oxygenates Oxygen MW2 11/06/90 981 1234 -253 4 4 <05 <05 <0 5 <50 -- 02/19/91 9 81 1107 -1 26 17 <0 5 <0 5 1 2 70 — — 10111/91 981 1229 -2 48 <0 5 <05 <0 5 <05 <50 - — 10/29191 9 59 1196 -237 — -- — -- — -- — 03/04/92 9 59 997 -0 38 19 1 0 <0 5 1 0 310 03/13/92 959 962 -003 -- -- — -- — - 09/01192 959 1275 -316 5 0 <0 5 <0 5 0 6 110 - 12103/92 9 59 1172 2 13 38 28 0 8 4 4 830 03/24/93 9 59 634 3 25 120 7 2 22 9 4 1 700 - 07123/93 959 810 1 49 21 1 2 <0 50 3 9 270 -- - 12127/93 9 59 896 0 63 59 12 <0 50 3 6 210 -- — 03130194 959 7 97 1 62 — -- — -- — - 06/24/94 9 59 922 037 <0 50 069 <0 50 21 140 -- - 09/16/94 959 1151 -1 92 6 5 079 <0 50 17 160 - 12/21/44 959 1034 -075 <0 50 <0 50 <0 50 077 50 - i 1 03/30/95 959 4 97 4 62 <0 50 <0 50 06130/95 959 614 345 <0 50 <050 <0 50 8 0 <50 - — 09/29/95 9 59 932 0 27 <0 50 <0 50 <0 50 <0 50 <50 - 12/29/95 959 864 095 <0 50 <0 50 <0 50 1 9 <50 — 03129/96 9 59 434 5 25 <05 <0 5 <05 <0 5 <50 = = 06128/96 9 59 690 269 <0 5 <0 5 <05 <0 5 <50 09130/96 959 1011 -052 <0 50 <0 50 <0 50 <0 50 <50 — - 12/17/96 959 905 0 54 <0 50 <050 <0 50 <0 50 <50 -- 03/25/97 959 392 567 <0 50 <0 50 <0 50 <0 50 <50 - 06/25/97 959 778 1 81 <0 5 <05 <0 5 <0 5 <50 — 09/18197 959 1093 -1 34 <0 5 <0 5 <05 <0 5 <50 — <MDLs 12116/97 959 996 -037 <0 5 <0 5 <05 <2 <50 — - 03/02/98 959 336 623 <0 5 <0 5 <05 <2 <50 <5 06/30/98 9 59 540 419 <0 50 <0 50 <0 50 <050 <50 -- — -- 09/29198 959 1045 -086 <0 50 <0 50 <0 50 <0 50 <50 — - <1 000 12123198 959 942 017 <0 50 <0 50 <0 50 <0 50 <50 <25 — — 04105/99 9 59 765 1 94 <0 50 <0 50 <0 50 <0 50 <50 <50 -- 07/09199 959 925 034 <0 50 <0 50 <0 50 <0 50 <50 <2 5 - — 10/07/99 959 1105 -1 46 <0 500 <0 500 <0 500 <0 500 <50 0 -- 12/28199 9 59 1024 -065 <0 500 <0 500 <0 500 <0 500 <50 0 — -- 03/21/00 959 7 59 2 00 <0 500 <0 500 <0 500 <0 500 <50 0 <2 50 — - 07/13/00 9 59 923 036 <0 500 <0 500 <0 500 <0 500 <50 -- 09127100 959 1062 -1 03 <0 5 <0 5 <05 <0 5 <50 — <MDLs — 12/20/00 959 1045 -086 — — - -- — 03/29101 9 59 945 014 <0 5 <0 5 <0 5 <05 <50 <5 0 - - 06118/01 959 1065 -1 06 <0 5 <G5 <0 5 <05 <50 <5 0 -- - 09/24/01 959 1176 -217 <0 5 <05 <0 5 <05 <50 <5 0 01/15/02 9 59 1039 -080 <0 5 <0 5 <05 <10 <50 <50 04/03102 1 959 9 71 -012 1 <0 5 1 <05 I <05 I <10 1 <50 1 <50 - - W N62582%TABLES\TA8LEGW.1.[8/21120021