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® m m m m m man MIM M m m m m m ® m <br />HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br />UNSATURATED ZONE AIR <br />NORTH COUNTY SANITARY LANDFILL <br />SG -2 Shallow <br />Sample Type: Air <br />Sampling Date 11/14/03 2/12/04 5/7/04 7/22/04 11/8/04 2/10/05 9/29/05 6/26/06 11/18/06 3/2/07 9/5/07 <br />Monitoring_ and Field Parameters _ <br />Ethanol NT NT NT NT NT NT NT NT NT <0.05 <4.6 <br />Hexane NT NT NT NT NT NT NT NT NT <0.05 <1.1 <br />2-Hexanone NT NT NT NT NT NT NT NT NT NT <4.6 <br />1.1.12 -Tetrachloroethane <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <1.1 <br />ioiuene <br /><u.3 <br />u.W <br />,.V <br />,.0 <br />,., <br />�u.a <br />w.0 <br />w.a <br />w.a <br />-u.a <br />`I. <br />1,2,4-Trichlorobenzene <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 />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 /><0.5 <br /><0.5 <br /><0.5 <br /><1.1 <br />1,1,1 -Trichloroethane <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 />Trichloroethene <br /><1.0 <br /><1.0 <br />1.2 <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.1 <br />R = Not Required <br />NT = Not Tested <br />* = Trace Concentration <br />{1} Parameter also detected in one or more quality control blanks. <br />