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TABLE 1 SUMMARY OF GROUNDWATER MONITORING AND ANALYTICAL RESULTS Gardner Property,Thornton,CA . Page 3 of 7 measured in feet MSL (Reported in ug/1) Well ID Date Wellhead Depth to G W Benzene Toluene Ethyl Xylenes TPHg MTBE Fuel Dissoved rlev Water I Elev Benzene EPA 8020 Oxygenates Oxygen MW3 11/06/90 1009 1258 -249 18 11 63 98 4 500 -- 02/19/91 1009 11 31 -1 22 270 15 60 110 4 400 -- 10/11/91 1009 1253 244 14 21 30 83 7 400 10/29/91 987 1219 -232 -- -- -- -- -- 03/04192 987 1020 -033 31 17 68 52 17 000 - 03/13/92 987 986 001 - -- -- -- -- 09/01/92 987 1302 -3 15 27 11 39 10 4 100 12/03/92 987 11 96 209 130 14 26 45 6 000 - 03/24/93 987 658 329 230 25 45 68 13 000 - 07/23/93 987 838 1 49 69 <0 50 29 17 2000 -- - 12/27/93 987 921 066 31 29 330 460 9 300 -- 03/30/94 987 821 166 -- -- - -- -- 06/24194 987 944 043 <0 50 <0 50 290 190 8 400 09/16/94 987 11 77 -1 90 <0 50 11 370 230 8 300 - 12/21/94 987 1060 073 12 <0 50 14 17 3 400 03/30/95 987 519 468 83 60 880 400 5 800 - 06/30/95 987 635 352 8 1 1 9 <0 50 15 610 • 09/29/95 987 952 035 22 1 4 22 19 1 900 -- 12/29/95 987 883 1 04 36 <0 50 <0 50 29 480 -- 03/29/96 987 455 532 15 27 21 55 940 06/28/96 987 709 278 <05 <0 5 <0 5 <0 5 <50 09/30/96 987 1028 -041 10 <0 5 <0 5 <0 5 190 12/17/96 987 924 063 48 06 <0 5 1 7 300 - 03/25/97 987 413 574 52 <0 5 <0 5 1 9 140 06/25/97 987 794 1 93 <0 5 <0 5 <0 5 20 670 09/18/97 987 11 10 -1 23 20 <0 5 <0 5 <0 5 220 <MDLs 12/16/97 987 1014 -027 07 <0 5 <0 5 <0 5 160 03/20/98 987 358 629 <0 5 <0 5 <0 5 <0 5 150 - -- 06/30/98 987 560 427 1 2 <0 50 <0 50 063 85 -- -- 09/29/98 987 1069 -082 1 1 067 <0 50 2 1 170 -- <1 000 12/23/98 987 962 025 1 0 056 <0 50 086 140 <2 5 -- 04/05/99 987 788 1 99 <0 5 <0 5 <0 5 <0 5 110 <5 0 07/09/99 987 944 043 <0 5 <0 5 <0 5 <0 5 <50 <2 5 10/07/99 987 11 25 -1 38 <0 500 <0 500 <0 500 <0 500 <50 0 -- 12/28/99 987 1042 -055 <0 500 <0 500 <0 500 <0 500 <50 0 -- 03/21/00 987 780 2 07 <0 500 <0 500 <0 500 <0 500 <50 0 <2 50 07/13/00 987 939 048 <0 500 <0 500 <0 500 <0 500 <50 -- 09127100 987 1080 -093 <05 <0 5 <0 5 <0 5 <50 -- <MDLs = 12/20/00 987 1 1062 1 -0751 <0 5 1 <0 5 1 <0 5 1 <05 <50 1 <5 0 W\62582\TABLES\7ablegw(312/OI]