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HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br />UNSATURATED ZONE SOIL GAS <br />FOOTHILL SANITARY LANDFILL <br />SG -10 <br />Sample Type: Air <br />Sampling Date 10/1/03 2/11/04 5/7/04 7/22/04 11/17/04 2/14/05 10/3/05 6/30/06 11/29/06 3/13/07 8/20/07 <br />Monitoring and Field Parameters <br />Methane Concentration percent <br />Carbon Dioxide (percent) NT NT NT NT NT NT NT NT 1.2 4.5 3.4 <br />Oxygen (percent) NT NT NT NT NT NT NT NT 10.6 4.5 11.5 <br />Volatile Organic Compounds PPB(v/v) <br />NT <br />NT <br />NT <br />NT <br />NT <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />10 <br /><u.5 <br />Freon 12 <br /><0.5 <br />660 <br />155 <br />757 <br />155 <br />429 <br />458 <br />460 <br />420 <br />570 <br />120 <br />Freon 114 <br /><0.5 <br />110 <br />26 <br />162 <br />27 <br />80 <br />103 <br /><0.5 <br />89 <br />110 <br />27 <br />Chloromethane <br /><0.5 <br />< <br /><0.5 <br /><0. <br />< <br /><0.5 <br />< <br />< <br />< <br />< <br /><0.5 <br />Vinyl one <br />< <br />< <br /><0.5 <br /><.5 <br /><0.5 <br />< <br /><• - <br /><.5 <br /><.5 <br /><0.5 <br /><.5 <br />1,3 -Butadiene <br />Bromomethane <br />NT <br /><0.5 <br />NT <br /><0.5 <br />NT <br /><0.5 <br />NT <br /><0.5 <br />NT <br /><0.5 <br />NT <br /><0.5 <br />NT <br /><0.5 <br />NT <br /><0.5 <br />NT <br /><0.5 <br />NT <br /><0.5 <br />NT <br /><0.5 - <br />Chloroethane <br /><.5 <br />< <br /><. <br />< <br /><. <br /><.5 <br />< <br />< <br />< <br />< <br />< GT <br />Freon 11 <br /><0.5 <br />22 <br />8.1 <br />33• <br />5.2 <br />15 <br />13 <br />12 <br />13 <br />10 <br />3.4 <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 />2.1 <br /><0.5 <br />2.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />1,1-Dichloroethene <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 /><0.5 <br /><0.5 <br /><0.5 <br />Acetone <br />NT <br />NT <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 /><0.5 <br />2-Pronanol <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 <br />NT <br />NT <br />NT <br />NT <br />NT <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />10 <br /><u.5 <br />3-Chloropropene <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />Methylene Chloride <br />6.5 <br />1.1* <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br />3.5 <br /><1.0 <br />Methyl tert-butyl ether <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT _ <br />NT <br />trans-1,2-Dichloroethene <br />Hexane <br />NT <br /><1.0 <br />NT <br /><1.0 <br />NT <br /><1.0 <br />NT <br /><1.0 <br />NT <br /><1.0 <br />NT <br /><1.0 <br />NT <br /><1.0 <br />NT <br /><1.0 <br />NT <br /><1.0 <br />NT <br /><1.0 <br />NT <br /><1.0 <br />- is oroe ane <br />< <br /><.5 <br />< <br /><.5 <br /><.5 <br />< <br />< <br /><.5 <br /><0, <br />< <br />< 0.5 <br />2- Butanone (Methyl Ethyl Ketone <br />NT <br />NT <br />NT <br />NT <br />NT <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />2.4 <br />cis- - is oroetene <br />< <br /><.5 <br /><.5 <br /><. <br /><.5 <br /><.5 <br />< <br /><0.5 <br />8. <br /><.5 <br />< <br />