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HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br />UNSATURATED ZONE SOIL GAS <br />FOOTHILL SANITARY LANDFILL <br />SGA 21 <br />Sample Type: Air <br />Sampling Date 7/22/04 2/14/05 10/3/05 11/17/06 3/13/07 8/20/07 1/29/08 7/29/08 1/23/09 7/15/09 3/2/10 <br />Monitoring and Field Parameters <br />Methane Concentration percent 0 <br />Carbon Dioxide ercent NT NT NT NT 0.5 0.2 0 0 0 NT 0.7 <br />xygen percent 8 20.3 20.6 19.7 20.1 NT 20.6 <br />Volatile Organic Compounds PPB (v/v) <br />Freon 12 0.9 <0.5 <0.5 <0.5 NT NT NT NT NT NT NT <br />Freon 114 <0.5 <0.5 <0.5 <0.5 NT NT NT NT NT NT NT <br />Chloromethane __ < < ' <0.5 NT NT .12F K1- <br />Bromomethane <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />N I <br />N I <br />N 1 <br />1141 <br />IN I <br />IN I <br />IN I <br />Chloroethane <br />I <br /><03 <br />' <br /><0.5 <br />Freon 11 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />Ethanol <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />Freon 113 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />1,1-Dichioroethene <br />Acetone <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 />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />9-Prnnnnol <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />Carbon Disulfide <0.5 <0.5 <0.5 <0.5 NT NT NT NT NT N I N I <br />3-Chloropropene NT NT NT NT NT NT NT NT NT NT NT <br />Meth I tert-but I ether NT NT NT NT NT NT NT NT NT NT NT <br />trans-1,2-Dichloroethene NT NT NT NT NT NT NT NT NT NT NT <br />Hexane <1.0 <1.0 <1.0 <1.0 NT NT NT NT NT NT NT <br />- Ic oroet ane <0.5 < ' <0.5 NT NT NT NT NT NT NT <br />