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TABLE 1 HISTORICAL ANALYTICAL RESULTS OF QUARTERLY GROUND WATER SAMPLES QUICK N SAVE #1 1901 South El Dorado Street, Stockton, California (µ9/1) Sample ID Depthto Water TPH-g Benzene Toluene Ethyl Total MTBE TBA DIPE ETBE TAME 1 ,2-DCA EDB (screen interval -ft Date (ft btoc) benzene Xylenes bsg) 8015M EPA Method 8260B 03/30/04 29. 18 930 670 9.2 9.1 30 2 <10 <1 .0 <1 .0 <1 .0 <0.5 <0.5 06/28/04 29.76 27000 1,200 5.9 18 11 <1 .0 <10 <1 .0 <1 .0 <1 .0 <0.5 <0.5 -- 08/30/04 31 .24 19000 790 4.9 6.9 9 11/17/04 32.09 1,100 19100 3 <0.5 4 <1 .0 <10 02/I4/05 30.39 750 160 340 3 10 160 <10 <1 .0 <1 .0 <1 .0 <0.5 <0.5 05/17/05 27.59 11500 19400 3 <0.5 5 5 <10 <1.0 <1 .0 36 17 <0.5 08/23/05 28.97 400 300 <0.5 <0.5 <0.6 38 <10 <1.0 <1.0 <1 .0 3.2 <0.5 11/16/05 - 900 590 3 <0.5 <0.6 71 ap 02/06/06 29.46 600 130 <0.5 <0.5 <0.6 10 <10 MW4 05/10/06 25.98 520 130 3 <0.5 <0.6 <1 .0 <10 <1 .0 <1 .0 7.1 5.4 <0.5 (30-50 bsg) 08/07/06 25.75 <50 50 <0.5 <0.5 <0.6 <1 .0 <10 <1 .0 <1 .0 <1 .0 <0,5 <0.5 11/07/06 26.6 400 230 <0.5 <0.5 <0.6 37 <10 <1 .0 4 .0 12 8.5 <0.5 02/07/07 26.45 430 190 10 <0.5 11 38 <10 <1 .0 4 .0 26 5 <0.5 05/07/07 25.87 400 160 <0.5 <0.5 <0.6 5 <10 <1 <1 8.3 4.7 <0.5 08/07/07 26.41 400 150 <0.5 <0.5 <0.6 5 <10 <1 <1 8.1 5.5 <0.5 11/07/07 26.87 260 130 9 <0.5 <0.6 27 <10 <1 <1 23 3.7 <0.5 02/07/08 25.68 300 280 3 <0.5 <0.6 11 <10 <1 <1 38 7.5 <0.5 05/07/08 24.65 300 78 <0.5 <0.5 <0.6 7 <10 <1 08/05/08 25.36 <50 23 <0.5 <0.5 <0.6 <1 .0 <10. <1 <1 <1.0 <0.5 <0.5 10/30/08 1 26.27 1 <50 1 12 <0.5 <0.5 1 <0.5 1 15 1 <10 I <t <1 <I.0 <0.5 <0.5 Notes. bsg: below surface grade TPH-g: Total petroleum hydrocarbons quantified as gasoline 112-DCA: 1,2-Dichloroethane MTBE: Methyl tertiary Butyl Ether EDB: 1,2-Dibromoethane TBA: t-Butyl Alcohol DIPE: Di-isopropyl Ether ETBE: Ethyl-t-butyl ether TAME: tertiary-Amyl Methyl Ether Advanced GeoEnvironmental, Inc.