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TABLE 9 SUMMARY OF GROUNDWATER MONITORING AND ANALYTICAL RESULTS Gardner Property,Thornton,CA . Page 1 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 Dissaved Elev Water Eley Benzene EPA 8020 Ox mates Qx en MUU1 11/06/90 979 1226 -247 <0 5 <05 <0 5 <0 5 <50 - 02/19/91 879 1096 -217 <0 5 <0 5 <0 5 <0 5 <60 - 10/11/91 979 1221 -242 <0 5 <0 5 <0 5 <0 5 <50 - 10/29/91 958 1188 -230 -- -- — -- -- -- - 03/04/92 958 989 -031 <0 5 <0 5 <0 5 <0 5 <50 - 03/13/92 958 954 004 -- -- -- -- -- 09101192 968 1265 -307 <05 <0 5 <0 5 <0 5 <50 -- 12/03192 958 1164 -206 <0 5 <0 5 <0 5 <0 5 <50 -- - 03/24/93 958 626 332 <0 5 <0 5 <0 5 <0 5 <50 -- - 07/23/93 958 804 1 54 <0 50 <0 50 <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 - - - - 09/16/94 958 1145 -1 87 <0 50 <0 50 <0 50 <0 50 <50 12/21/94 958 1028 -070 -- -- -- -- -- -- -- 03/30/95 958 496 462 06/30/95 958 611 347 - . 09/29/95 9 58 934 024 <0 50 <0 50 <0 50 <0 50 <50 - 12/29/95 958 863 095 -- -- -- - -- 03/29/96 958 433 525 - - 06/28/96 958 6 88 270 -- - - 09/30/96 958 1010 -052 <0 50 <0 50 <0 50 <0 50 <50 - - 12/17/96 958 904 054 -- -- -- -- -- - 03/25/97 958 392 566 -- - - - 06/25/97 958 773 1 85 - - - - - 09/18/97 958 1090 -132 <05 <0 5 <0 5 <0 5 <50 <MDLs 12/16/97 958 995 -037 - -- -- -- -- 03/20198 958 338 620 -- 06/30/98 958 538 420 — -- - - 09/29/98 958 1050 092 <0 50 <0 50 <0 50 <0 50 <50 1 000 12/23/98 958 941 017 -- -- -- - -- -- 04/05/99 958 768 1 90 - 07/09/99 958 922 036 -- — 10/07/99 958 1106 -148 <0 500 <0 500 <0 500 <0 500 <50 0 - - 12/28/99 958 10211 -063 -- -- -- - -- 03121/00 958 726 232 - 07/13/00 958 917 041 -- - - 09/27/00 951 1111 -1 01 <0 5 <0 5 115 <0 5 150 -- <MDLS -J 12/20/00 958 1042 -084 W\625a2\TA8LES\Tab1ejw[3/2/01]