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TABLE 1 SUMMARY OF GROUNDWATER MONITORING AND ANALYTICAL RESULTS Gardner Property,Thornton,CA Pagel of 7 .� measured in feet M (Reported inu /I Well ID Date Wellhead Depth to G W Benzene Toluene Ethyl Xylenes TPHg MTBE Fuel Dissoved lev Water Elev Benzene EPA 8020 Ox enates Ox en MW1 11/06/90 1379 12 26 -247 <0 5 <0 5 <0 5 <0 5 <50 02/19/91 879 1096 -2 17 <05 <05 <0 5 <0 5 <50 10/11/91 979 1221 -242 <0 5 <0 5 <0 5 <0 5 <50 10/29/91 958 11 88 -230 -- -- __ _ 03/04/92 958 989 -031 <0 5 <0 5 <0 5 <0 5 <50 - 03/13/92 958 954 004 -- -- __ _ 09/01/92 958 12$5 -307 <0 5 <0 5 <0 5 <0.5 <50 12/03/92 958 11 64 -206 <0 5 <0 5 <05 <05 <50 03/24/93 958 6 26 3 32 <0 5 <0 5 <0 5 <0 5 <50 07/23/93 958 804 1 54 <0 50 <050 <0 50 <0 50 <50 _ 12/27/93 958 886 072 -- -- __ _ 03/30/94 958 7 87 1 71 _ 06/24/94 958 909 049 -- -- __ -- 09/16194 9 58 1145 1 87 <0 50 <0 50 <0 50 <050 <50 12/21/94 958 1028 -070 -- -- __ -- 03130/95 9 58 4 96 462 - 06/30/95 958 611 347 -- -- __ -- 09/2V95 9 58 9 34 0 24 <0 50 <0 50 <0 50 <0 50 <50 12/29/95 958 863 095 -- -- 03/29/96 1358 4 33 525 06/28/96 958 688 270 -- - -- 09/30196 9 58 1010 D52 <0 50 <0 50 <0 50 <050 <50 12/17/96 958 904 054 -- -- __ -- 03/25197 9 58 3 92 566 06/25/97 958 773 1 85 -- - -- 09118197 958 1090 -1 32 <0 5 <0 5 <0 5 <0 5 <50 <MDLs 12/16/97 958 995 0 37 -- - __ __ _ 03/20/98 9 58 3 38 620 06/30/98 958 538 4 20 -- -- _ -- 09129198 956 1050 -092 <0 50 <0 50 <050 <0 50 <50 -- 1 000 12/23/98 958 941 0 17 -- - _ -- 04/05/99 958 768 190 -- _ 07/09/99 968 922 0 36 — __ __ -- 10107199 958 11 06 148 <0 500 <0 500 <0 500 <0 500 <50 0 12/28/99 958 1021 -063 -- - __ __ _ 03/21/00 9 58 726 232 07/13/00 958 917 041 -- __ __ __ -- 09127/00 958 1059 -1 01 <0 5 <0 5 <0 5 <0 5 <50 <MDLs 12120/00 9 58 1042 084 -- -- __ -- 03/291()l 958 943 015 . 06/18/01 9 58 1060 102 -- __ 09/24/01 9 58 11 73 -215 <0 5 <05 <0 5 <0 5 <50 <5 0 01/15/02 958 1038 -080 -- _ _ 04/03/02 1 958 1 969 1 -0 11 W\62582\TA8LE5\TABLEGW.1s(8/21/2002]