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0 9 0 <br />HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br />UNSATURATED ZONE SOIL GAS <br />FOOTHILL SANITARY LANDFILL <br />SG -11 <br />Sample Type: Air <br />Sampling Date 10/1/03 2/11/04 5/6/04 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 />Volatile Organic Compounds PPB (v/v) <br />Freon 12 2.2 491 1299 340 113 500 890 1100 840 1000 780 <br />Freon 114 <0.5 75 269 89 112 193 <0.5 <0.5 290 280 280 <br />Chloromethane <0.5 1.6 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <br />1,3 -Butadiene NT NT NT NT NT NT NT N I NT N I N1 <br />Bromomethane <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 />Chloroethane <br /><0.5 <br /><0.5 <br />0.8 <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 />Freon 11 <br /><0.5 <br />4.3 <br />5.4 <br />12 <br />2.7 <br />5.4 <br /><0.5 <br />6.7 <br />5.7 <br />8.4 <br />4.6 <br />Ethanol <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />32 <br />Freon 113 <br /><0.5 <br />0.90 <br />0.8 <br />1.1 <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 />11 <br />23 <br /><0.5 <br />16 <br />66 <br /><0.5 <br /><0.5 <br />49 <br />39 <br />Acetone <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 />110 <br />2 -Propanol <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT- <br />28 <br />Carbon Disulfide <br />NT <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 />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 />1.2* <br />1.2* <br />1.6 <br />0.9 <br />1.8 <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br />Methyl tert-butyl ether <br />trans-1,2-Dichloroethene <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 />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />Hexane <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br />16 <br />8.6 <br />1 1-r)ieh1nrnafi nna <br /><n A <br /><n A <br /><n A <br /><n A <br /><n A <br /><n.j; <br /><n A <br />79 <br />3.2 <br /><n 5 <br /><n A <br />1.1.1 -Trichloroethane <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <br />Cvclohexane <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 14 12 <br />