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HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br />UNSATURATED ZONE SOIL GAS <br />FOOTHILL SANITARY LANDFILL <br />SG -7 <br />Sample Type: Air <br />Sam lin Date 8/20/07 1/29/08 7/29/08 1/23/09 7/15/09 3/2/10 9/3/10 1/25/11 7/29/11 <br />Monitoring and Field Parameters <br />Volatile Organic Compounds PPB fv/v) <br />Freon 12 8 130 79 150 170 110 120 79 47 <br />Freon 114 <0.5 2.7 2.4 3.4 3.9 2.8 3.2 2.2 <2.0 <br />Chloromethane <03 ` ` ` <5. ` • ` `4. < <br />7.9 <br />1,3 -Butadiene NT NT <1.3 <1.2 <1.5 <1.8 <2.1 <1.1 <2.0 <br />Bromomethane <br /><0.5 <br /><0.5 <br /><1.3 <br /><1.2 <br /><1.5 <br /><1.8 <br /><2.1 <br /><1.1 <br /><2.0 <br />Chloroethane <br /><0. <br /><.5 <br /><.3 <br /><. <br /><, <br /><.8 <br /><. <br /><, <br />< 7.9 <br />Freon 11 <br />Ethanol <br />2.8 <br />4 <br />59 <br /><.6 <br />44 <br />21 <br />72 <br /><, <br />87 <br /><. <br />94 <br /><7. <br />92 <br /><.5 <br />68 <br />18 <br />48 <br />870 E <br />Freon 113 <br /><0.5 <br />4 <br />2.8 <br />5.7 <br />4.9 <br />6 <br />5 <br />3.3 <br />2.1 <br />1,1-Dichloroethene <br />Acetone <br /><0.5 <br />13 <br /><0.5 <br />6.8 <br />3.2 <br />22 <br /><1.2 <br /><4.8 <br /><1.5 <br />7.7 <br /><1.8 <br /><7.0 <br /><2.1 <br />13 <br /><1.1 <br /><4.5 <br /><2.0 <br /><7.9 <br />2 -Propanol <br />NT <br />NT <br /><5.1 <br /><4.8 <br /><5.9 <br /><7.0 <br /><8.5 <br /><4.5 <br /><7.9 <br />Carbon Disulfide <br /><0.5 <br /><0.5 <br /><1.3 <br /><1.2 <br /><1.5 <br /><1.8 <br /><2.1 <br /><1.1 <br /><7.9 <br />3 -Chloro ro ene <br />NT <br />NT <br /><5.1 <br /><4.8 <br /><5.9 <br /><7.0 <br /><8.5 <br /><4.5 <br /><7.9 <br />Methylene Chloride <br /><1.0 <br /><1.0 <br /><1.3 <br /><1.2 <br /><1.5 <br /><1.8 <br /><2.1 <br /><1.1 <br /><2.0 <br />Methyl tert-butyl ether <br />NT <br />NT <br /><1.3 <br /><1.2 <br /><1.5 <br /><1.8 <br /><2.1 <br /><1.1 <br /><2.0 <br />trans- 1,2-Dichloroethene <br />. <br />NT <br />-4 n <br />NT <br />,-1 n <br /><1.3 <br />e 'A <br /><1.2 <br />c1 9 <br /><1.5 <br /><1 F <br /><1.8 <br /><1 8 <br /><2.1 <br /><21 <br /><1.1 <br /><1.1 <br /><2.0 <br /><2.0 <br />Gn10rOr0rm ��•� - - <br />- ric oroet ane <0.5 <0.5 < < < .5 <1.8 < < <2.0 <br />