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` y TABLE 1 SUMMARY OF GROUNDWATER MONITORING AND ANALYTICAL RESULTS Gardner Property,Thornton, CA . Page 5 of 7 (measured in feet M5L} (Reported in ug 1) FMW5 Date Wellhead Depth to G W Benzene Toluene Ethyl Xylenes TPHg MTBE Fuel Dissoved Elev Water Elev Benzene (EPA 8020) Oxygenates Oxygen 10/29/91 925 1162 -237 2 1 <0 30 <0 30 <0 30 <30 -- — — 03/04/92 925 963 -038 <0 5 <0 5 <0 5 <0 5 95 — -- 03/13/92 925 930 -005 -- -- -- — —09101/92 925 1239 -314 <0 5 <0 5 <0 5 <0 5 <50 — - 12/03/92 925 1137 -212 <0 5 <0 5 <0 5 <0 5 <50 — -- '- 03/24/93 9 25 599 326 <0 5 <0 5 <0 5 <0 5 <50 -- -- -- 07/23/93 925 778 147 <0 50 <0 50 <0 50 <0 50 <50 -- — — 12/27/93 925 861 064 -- — -- -" -- -- -- -- 03/30/94 925 762 163 -- 06/24/94 925 8 87 0 38 -- -- "- -- -- -- — 09/24/94 925 11 19 -194 -- -- — -- -_ - - 12/21/94 925 999 -074 -- 03/30/95 925 4 62 4 63 <0 50 <0 50 <0 50 <0 50 <50 — — -' 06/30/95 925 578 347 — -- -- -- — - 09/29/95 925 goo 025 <0 50 <0 50 <0 50 <0 50 <50 -- -- -- • 12/29/95 925 828 0 97 — -- -- __ �- 03/29/96 925 396 529 <0 5 <0 5 <0 5 <0 5 <50 — -- — 06/28/96 925 655 2 70 -- — — — — — 09/30/96 925 975 -050 <0 50 <0 50 <0 50 <0 50 <50 -- -- -- 12/17/96 925 870 0 55 -- -- -- — — -- -- -- 03/25/97 925 355 570 <0 50 <0 50 <0 50 <0 50 <50 — -- 06/25/97 925 742 1 83 -- -- -- — -- -- -- 09/18/97 925 1058 -1 33 <0 5 <0 5 <0 5 <0 5 <50 — <MDLs -- 12/16/97 925 962 -037 — — -- -- -- 03/20/98 925 298 627 <0 5 <0 5 <0 5 <2 <50 <5 -- — 06/30/98 925 503 422 -- — -- — — — -- -- 09/29/98 925 1007 -082 <0 50 <0 50 <0 50 <0 50 <50 -- <1,000 12/23/98 925 905 0 20 -- -- — -- -- -- — -" 04/05/99 925 728 1 97 <0 50 <0 50 <0 50 <0 50 <50 0 <5 0 -- -- 07/09/99 925 887 038 -- — -- — — - 10/07/99 925 1070 -145 <0 500 <0 500 <0 500 <0 500 <50 0 -- -- 12/26/221 925 1 989 -064 -- -- -- — -" — "" W t25821TA13LEMTab1.9.[0111012000[