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Sample Type: Air <br />Sampling Date <br />7/22/04 <br />HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br />UNSATURATED ZONE AIR <br />NORTH COUNTY SANITARY LANDFILL <br />SG -3 Deep <br />11/8/04 2/10/05 9/30/05 6/26/06 11/18/06 3/2/07 <br />9/5/07 <br />3/11/08 <br />7/28/08 <br />1/30/09 <br />7/14/09 <br />Bromochloromethane <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><1.1 <br /><1.3 <br /><1.5 <br /><1.2 <br /><1.2 <br />n-butylbenzene <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><1.1 <br /><1.3 <br /><1.5 <br /><1.2 <br /><1.2 <br />sec-butylbenzene <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><1.1 <br /><1.3 <br /><1.5 <br /><1.2 <br /><1.2 <br />tert-butyl benzene <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><1.1 <br /><1.3 <br /><1.5 <br /><1.2 <br /><1.2 <br />2-chloroethyl vinyl ether <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><1.1 <br /><1.3 <br /><1.5 <br /><1.2 <br /><1.2 <br />Chloroprene <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><5.3 <br /><5.9 <br /><4.8 <br />2-chlorotoluene <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><5.3 <br /><5.9 <br /><4.8 <br />4-chlorotoluene <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><5.3 <br /><5.9 <br /><4.8 <br />1,2-dibromo-3-chloropane <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><5.3 <br /><5.9 <br /><4.8 <br />Dibromomethane <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><1.3 <br /><1.5 <br /><1.2 <br /><1.2 <br />trans-1,4-dichloro-2-butene <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><1.3 <br /><1.5 <br /><1.2 <br /><1.2 <br />Dibromochloromethane <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><1.1 <br /><1.3 <br /><1.5 <br /><1.2 <br /><1.2 <br />1,3-dichloropropane <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><1.1 <br /><1.3 <br /><1.5 <br /><1.2 <br /><1.2 <br />2,2-dichloropropane <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><1.1 <br /><1.3 <br /><1.5 <br /><1.2 <br /><1.2 <br />1,1-dichloropropene <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><1.1 <br /><1.3 <br /><1.5 <br /><1.2 <br /><1.2 <br />_ <br />trans- 1,2-_dichloroethene <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 /><1.3 <br /><1.5 <br /><1.2 <br /><1.2 <br />1,1-dichloropropene <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 /><1.3 <br /><1.5 <br /><1.2 <br /><1.2 <br />lodomethane <br />NT <br />NT <br />NT <br /><1.1 <br />Isobutanol <br />NT <br />NT <br />NT <br /><1.1 <br />Isopropylbenzene <br />NT <br />NT <br />NT <br /><1.1 <br />p-isopropyltoluene <br />NT <br />NT <br />NT <br /><1.1 <br />Methacrylonitrile <br />NT <br />NT <br />NT <br /><1.1 <br />Methyl methacrylate <br />NT <br />NT <br />NT <br /><1.3 <br /><1.5 <br /><1.2 <br /><1.2 <br />Naphthalene <br />NT <br />NT <br />NT <br /><1.3 <br /><1.5 <br /><1.2 <br /><1.2 <br />Propionitrile <br />NT <br />NT <br />NT <br /><1.3 <br /><1.5 <br /><1.2 <br /><1.2 <br />n-propylbenzene <br />NT <br />NT <br />NT <br /><1.3 <br /><1.5 <br /><1.2 <br /><1.2 <br />4-methyl-2pentanone <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><1.1 <br /><1.3 <br /><1.5 <br /><1.2 <br /><1.2 <br />1,1,1,2 -Tetrachloroethane <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><1.1 <br /><1.3 <br /><1.5 <br /><1.2 <br /><1.2 <br />1,1,1,2 -Tetrachloroethane <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 /><1.3 <br /><1.5 <br /><1.2 <br /><1.2 <br />1,2,3-Trichlorobenzene <br />NT <br />NT <br />NT <br />NT <br />1,1,2 -Trichloroethane <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 /><1.3 <br /><1.5 <br /><1.2 <br /><1.2 <br />1 2 3-trichloropropane <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><1.1 <br /><1.3 <br /><1.5 <br /><1.2 <br /><1.2 <br />vinyl acetate <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><1.1 <br /><1.3 <br /><1.5 <br /><1.2 <br /><1.2 <br />Total Xylenes <br />NT <br />NR = Not Required <br />NT = Not Tested <br />" = Trace Concentration <br />{1} Parameter also detected in one or more <br />quality control blanks. <br />