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r A r HlsWi AL Su OF LLM R TS <br />UNSATURATED ZONE SOIL GAS <br />FOOTHILL SANITARY LANDFILL <br />SG•10 <br />Sample Type: Air <br />Sampling Date 10/1/03 2/11104 5/7/04 7/22/04 11/17/04 2/14/05 10/3/05 6/30/06 11/29/08 3/13107 <br />Mont dnu and Field Parameters <br />Methane Concentration <br />Carbon io percent—NT— NTRT NTNTNT NT NT 4.5 <br />Not Required <br />NT = Not Tested <br />= Trace Concentration <br />{1} Parameter also detected In one or more quality control hanks. <br />SG -10; Printed: 7/20/2007 10 of 15 <br />