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m `m m m m � m <br />HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br />UNSATURATED ZONE AIR <br />NORTH COUNTY SANITARY LANDFILL <br />SG -2 Deep <br />Sample Type: Air <br />SampUM Date 11/14/03 2112/a4 5/7/04 7/22104 11/8/04 2/10/05 9/29/05 <br />Monitoring and Field Parameters <br />Methane Concentration (percent) <br />Required <br />NT = Not Tested <br />* = Trace Concentration <br />{1) Parameter also detected in one or more quality control blanks <br />SG -2, Deep; Printed: 1/25/2006 6 of 17 <br />