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_ NRiSTOR UMN of ANA AL RES® <br />UNSATURATED ZONE SOIL GAS <br />FOOTHILL SANITARY LANDFILL <br />SG -121 <br />Sample Type: Air <br />Sampling Date 7/22/04 11117/08 2/14/05 10/3/05 3/13/07 <br />Monitoring and Field Parameters <br />Methane Concen on perces0 0 0 <br />--7Ca n lox NT— NT'— NT --N1 0.5 <br />NR = Not Required <br />NT = Not Tested <br />* = Trace Concentration <br />{1} Parameter also detected in one or more quality control blanks. <br />SG -121; Printed: 7/20/2007 13 of 15 <br />