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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 Re orted in un(EPAT8020): Well ID Date Wellhead Depth to G W Benzene Toluene Ethyl Xylenes TPHgBE Fuel Dissoved Elev Water Elev BenzeneOxygenates Oxygen MW3 11106190 1009 1258 249 18 11 63 98 4 500 - 02/19/91 1009 1131 1 22 270 15 60 110 4 400 — — 10/11/91 1009 1253 244 14 21 30 83 7 400 — 10/29/91 987 12 19 -232 -- — — — -- D3104/92 987 1020 -033 31 17 68 52 17 000 - 03/13/92 987 986 001 — — — — I — - — 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 - — 07/23/93 987 838 149 69 <0 50 29 17 2000 — — 12/27193 987 921 066 31 29 330 460 9 300 - - 03/30/94 987 821 166 — -- -- -- _ 06/24/94 987 944 043 <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 -- -- 06/30/95 987 635 362 81 1 9 <0 50 15 610 -- 09/29/95 987 952 035 22 14 22 19 1 900 -- 12/29/95 987 883 104 36 <0 50 <0 50 29 480 — • 03/29/96 987 455 532 15 27 21 55 940 = = 06/28/96 987 709 278 <0 5 <0 5 <0 5 <0 5 <50 09/30/96 987 1028 -041 1 0 <0 5 <0 5 <0 5 190 — — 12/17/96 987 924 063 48 06 <0 5 1 7 300 — -- 03/25197 987 4 13 574 52 <0 5 <0 5 1 9 140 — — 06125/97 987 794 1 93 <0 5 <0 5 <0 5 20 670 — — 09/18/97 987 11 10 -123 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 65 -- — -- 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 .40500 <50 0 — — 12128/99 987 1042 -055 <0 500 <0 500 <0 500 <0 500 <50 0 — -- 03/21/00 987 780 207 <0 500 <0 500 <0 500 <0 500 <50 0 <2 50 — - 07/13/00 987 939 048 <0 Soo <0 500 <0 500 <0 500 <50 -- — 09/27100 987 1080 -093 <0$ <0 5 <0 5 <0 5 <50 — <MDLs — 12/20/00 987 1062 -075 <0 5 <0 5 <0 5 <0 5 <50 <5 0 - 03/29/01 987 964 023 <0 5 <0 5 <0 5 <0 5 <50 <5 0 — 06/18/01 987 1082 -095 <0 5 <0 5 <0 5 <0 5 <50 <5 0 — — 09/24/01 987 11 94 -207 <0 5 <0 5 <0 5 <0 5 <50 <5 0 — - 01/15/02 987 1058 -071 <0 5 <0 5 <0 5 <1 0 <50 <5 0 — p4103l02 9 87 9 90 0 03 <0 5 <0 5 <05 <1 0 <50 <5 0 — — W 162582%TA9LE5%TAKEGW xls(8/2l/20OZ)