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M M M M M M M M M M M <br />HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br />UNSATURATED ZONE AIR <br />NORTH COUNTY SANITARY LANDFILL <br />SG -1 Intermediate <br />Sample Type: Air <br />Sampling Date <br />11/14/03 <br />2/11/04 <br />5/7/04 <br />7/22/04 <br />11/8/04 <br />2/10/05 <br />9/29/05 <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 />Ethanol <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 /><5.8 <br /><4.8 <br />Ethylbenzene <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 /><1.4 <br /><1.2 <br />4-Ethyltoluene <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 /><1.4 <br /><1.2 <br />Heptane <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 /><1.4 <br /><1.2 <br />Hexachlorobutadiene <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br /><4.6 <br /><5.8 <br /><4.8 <br />Hexane <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 /><1.4 <br /><1.2 <br />2-Hexanone <br />NT' <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><4.6 <br /><5.8 <br /><4.8 <br />Methylene Chloride <br />{3.6} <br /><1.0 <br /><1.0 <br />{6_5} <br />1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.1 <br /><1.4 <br /><1.2 <br />4-methyl-2pentanone <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><1.1 <br /><1.4 <br /><1.2 <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 /><0.5 <br /><1.1 <br /><1.4 <br /><1.2 <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 /><5.8 <br /><4.8 <br />Propylbenzene <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 /><1.4 <br /><1.2 <br />Styrene <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 /><1.4 <br /><1.2 <br />1,1,2-Trichloro-1,2,2-Trifluoroethane <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 /><1.4 <br /><1.2 <br />1 1 ? ?-TatrarhlnrnPthanP <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 /><1.4 <br /><1.2 <br />1,2,4-Trichlorobenzene <1.0 <1.0 <1.0 9.5 <i.0 <'i.0 <i.0 <i.0 <i.0 --i.0 `4.0 `o.o `4.0 <br /><0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <1.1 <1.4 <1.2 <br />1,1,1 -Trichloroethane <0.5 <0.5 <0.5 <br />1,1,2 -Trichloroethane <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <1.1 <1.4 <1.2 <br />Trirhlnrnathrmna <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.1 <1.4 <1.2 <br />NR = Not Required <br />NT = Not Tested <br />* = Trace Concentration <br />{1} Parameter also detected in one or more quality control blanks. <br />