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HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br />UNSATURATED ZONE SOIL GAS <br />FOOTHILL SANITARY LANDFILL <br />SG -6 <br />Sample Type: Air <br />Sampling 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 <br />Monitoring and Field Parameters <br />Volatile Oraanic Compounds PPB (v/v <br />Freon 12 <br />Freon 114 <br />1900 <br />75 <br />620 <br />24 <br />3000 <br />130 <br />4200 <br />190 <br />3400 <br />120 <br />1900 <br />75 <br />810 <br />36 <br />250 <br />10 <br />___Clord ane <br /><0.5 <br /><0.5 <br /><38. <br /><47.0 <br /><51 <br /><25 <br /><12 <br /><4.7 <br />inyl Chloride <br /><0.5 <br /><0.5 <br /><9.5 <br /><1-T-0 <br />< 3 <br /><6.3 <br /><2.9 <br /><1.2 <br />1,3 -Butadiene <br />NT <br />NT <br /><9.5 <br /><12.0 <br /><13 <br /><6.3 <br /><2.9 <br /><1.2 <br />Bromomethane <br /><0.5 <br /><0.5 <br /><9.5 <br /><12.0 <br /><13 <br /><6.3 <br /><2.9 <br /><1.2 <br />-Chloroethane <br />Freon 11 <br />Ethanol <br />Freon 113 <br />1,1-Dichloroethene <br /><0.5 <br />680 <br />NT <br />41 <br /><0.5 <br /><0.5 <br />240 <br />NT <br />13 <br /><0.5 <br />< <br />1200 <br /><38.0 <br />69 <br /><9.5 <br /><12.0 <br />1300 <br /><47.0 <br />96 <br /><12.0 <br /><13 <br />1000 <br /><51 <br />58 <br /><13 <br /><6.3 <br />910 <br /><25 <br />63 <br /><6.3 <br /><2.9 <br />330 <br /><12 <br />18 <br /><2.9 <br /><1.2 <br />110 <br />17 <br />5.4 <br /><1.2 <br />Acetone <br />5.3 <br /><0.5 <br />48 <br /><47.0 <br /><51 <br /><25 <br /><12 <br />11 <br />2 -Propanol <br />NT <br />NT <br /><38.0 <br /><47.0 <br /><51 <br /><25 <br /><12 <br /><4.7 <br />Carbon Disulfide <br /><0.5 <br />2.8 <br /><9.5 <br /><12.0 <br /><13 <br /><6.3 <br /><2.9 <br /><1.2 <br />3-Chloropropene <br />NT <br />NT <br /><38.0 <br /><47.0 <br /><51 <br /><25 <br /><12 <br /><4.7 <br />Methylene Chloride <1.0 <1.0 <9.5 <12.0 <13 <6.3 <2.9 <1.2 <br />Methyl tert-butyl ether <br />NT <br />NT <br /><9.5 <br /><12.0 <br /><13 <br /><6.3 <br /><2.9 <br /><1.2 <br />trans-1,2-Dichloroethene <br />NT <br />NT <br /><9.5 <br /><12.0 <br /><13 <br /><6.3 <br /><2.9 <br /><1.2 <br />Hexane <br /><1.0 <br /><1.0 <br /><9.5 <br /><12.0 <br /><13 <br /><6.3 <br /><2.9 <br /><1.2 <br />1,1- is oroethane <br /><0.5 <br /><0.5 <br /><9.5 <br /><12.0 <br /><13 <br /><6.3 <br /><2.9 <br /><1.2 <br />2-Butanone (Methyl Ethyl Ketone) <br />19 <br />5.8 <br /><9.5 <br /><12.0 <br /><13 <br /><6.3 <br /><2.9 <br /><1.2 <br />1. 1. 1 -Trichloroethane <0.5 <0.5 <9.5 <12.0 <13 <6. <2.9 <1.2 <br />