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® HISL SM& OF IWCALMLTS - <br />UNSATURATED ZONE SOIL GAS <br />FOOTHILL SANITARY LANDFILL <br />Sample Type: Air <br />SG -3 <br />Sampling Date 10/1/03 2/11/04 5/6/04 7/22/04 11/15/04 2/14/05 10/3/05 6/30/06 11/29/06 3/13/07 <br />Monitorina and Field Parameters <br />Methane Concentration (percent 0 0 0 0 0 0 0 0 <br />carbon Dloxide (percent) T NT fNT FIT—NT NT FI`i�—N�T— T 4.5 <br />Required <br />NT = Not Tested <br />* = Trace Concentration <br />(1) Parameter also detected in one or more quality control blanks. <br />SG -3; Printed: 7/20/2007 3 of 15 <br />