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0 9 0 <br />HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br />UNSATURATED ZONE AIR <br />NORTH COUNTY SANITARY LANDFILL <br />SG -6 <br />Sample Type: Air <br />Sam lin Date <br />9/29/03 <br />2/11/04 <br />5/7/04 <br />7/22/04 <br />11/9/04 <br />2/10/05 <br />9/30/05 <br />6/26/06 <br />11/18/06 <br />3/2/07 <br />9/5/07 <br />3/11/08 <br />7/28/08 <br />Monitoring and Field Parameters <br />Methane Concentration (percent) <br />38.4 <br />59.7_ <br />44.2 <br />54.8 <br />45.9 <br />55.4 <br />50.3 <br />57.4 <br />3.5 <br />46.1 <br />44.8 <br />28.1 <br />1.2 <br />Carbon Dioxide (percent) <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />31.6 <br />44.6 <br />27.7 <br />26.1 <br />Oxygen (percent) <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />0 <br />0 <br />0.4 <br />2.1 <br />Volatile Organic Compounds PPB (v/v) <br />Freon 12 (Dichlorodifluoromethane) <br />30 <br />3116 <br />1765.0 <br />119 <br /><0.5 <br />932 <br />1128 <br />670 <br />26 <br />340 <br />13000 <br />2700 <br />41 <br />Freon 114 (1,2-Dichloro-1,1,2,2-Tetr, <br />6.1 <br />213 <br />47 <br /><0.5 <br /><0.5 <br />132 <br />205 <br /><0.5 <br />5.9 <br />52 <br />130 <br />42 <br />8.6 <br /><0.5 <br /><0.5 <br /><0.5 <br />3.3 <br /><0.5 <br /><0.5 <br /><0.5 <br />190 <br /><0.5 <br /><0.5 <br /><4.6 <br /><42 <br /><15 <br />_Chloromethane <br />Vinyl Chloride <br />6.3 <br />158 <br />206 <br />155 <br /><0.5 <br />890 <br />1216 <br />550 <br />14 <br />280 <br />400 <br />39 <br />12 <br />1,3 -Butadiene <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><1.1 <br /><10 <br /><3.8 <br />Bromomethane <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />1.3 <br /><0.5 <br /><1.1 <br /><10 <br /><3.8 <br />Chloroethane <br />17 <br />239 <br />286 <br />185 <br /><0.5 <br />771 <br />685 <br /><0.5 <br />10 <br />140 <br />140 <br />29 <br />10 <br />Freon 11 (Trichlorofluoromethane) <br />2.8 <br />84 <br />49 <br />7.7 <br />2.7 <br />10 <br /><0.5 <br />18 <br /><0.5 <br />6.7 <br /><1.1 <br /><10 <br /><3.8 <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><0.05 <br /><4.6 <br /><42 <br /><15 <br />_Ethanol <br />Freon 113 <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><10 <br /><3.8 <br />1,1-Dichloroethene (1,1-Dichloroethy <br />1 <br /><0.5 <br /><0.5 <br />11 <br />15 <br />23 <br /><0.5 <br />6.9 <br /><0.5 <br />5.8 <br /><1.1 <br /><10 <br /><3.8 <br />Acetone <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />6.9 <br /><4.6 <br /><42 <br />26 <br />2 -Propanol <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><4.6 <br /><42 <br /><15 <br />Carbon Disulfide <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><1.1 <br /><10 <br /><3.8 <br />3-Chloropropene <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><4.6 <br /><42 <br /><15 <br />Methylene Chloride <br />3 <br />59 <br />41" <br />(67) <br />27.0 <br />86 <br />141 <br />31 <br /><0.5 <br />12 <br /><1.1 <br /><3.8 <br />Methyl tert-butyl ether <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />130 <br />80 <br />64 <br />51 <br />trans-1,2-dichloroethene <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />Hexane <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />720 <br />260 <br />93 <br />24 <br />1,1-Dichloroethane <br />11 <br />85 <br />100 <br />129 <br />90 <br />126 <br />150 <br />30 <br />4 <br />38 <br /><1.1 <br />14 <br />12 <br />2-butanone (Methyl Ethyl Ketone) <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><1.1 <br /><10 <br /><3.8 <br />cis-1,2-Dichloroethene <br />33 <br />896 <br />414 <br />903 <br />423 <br />1374 <br />1348 <br />590 <br />19 <br />260 <br />400 <br />80 <br />31 <br />Tetrahydrofuran <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><0.05 <br /><1.1 <br /><10 <br /><3.8 <br />Chloroform <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><1.1 <br /><10 <br /><3.8 <br />1,1,1 -Trichloroethane <br /><0.5 <br /><0.5 <br /><0.5 <br />3.8 <br />1.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />4.4 <br /><1.1 <br /><10 <br /><3.8 <br />Cyclohexane <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />260 <br />140 <br />61 <br />34 <br />r.arhnn TatrarhlnridP <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><1.1 <br /><10 <br /><3.8 <br />