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9 0 9 <br />HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br />UNSATURATED ZONE SOIL GAS <br />FOOTHILL SANITARY LANDFILL <br />SG -4 <br />Sample Type: Air <br />Sampling Date 8/20/07 1/29/08 7/29/08 1/22/09 7/15/09 3/2/10 9/3/10 1/25/11 7/29/11 4/12/12 <br />Monitoring and Field Parameters <br />Methane on 0 0 0 6.7 0 0 0 0 0 0 <br />Carbon iox1, . <br />xygen (perc 11.1 20 12.9 0 6 18.1 18.2 16.6 11.8 18.9 <br />Volatile Organic Compounds PPB(v/v) <br />29 <br />4.4 <br />19 <br />170 <br />39 <br />15 <br />8.4 <br />9.2 <br />9.9 <br />Freon 12 81 <br />11 <br />22 <br />600 <br />100 <br />26 <br />21 <br />25 <br />31 <br />180 <br />Freon 114 12 <br />2.1 <br />6.7 <br />130 <br />18 <br />4.8 <br />3.3 <br />5.6 <br />5.9 <br />35 <br />hloromethai <0.5 <br /><0.5 <br /><4.8 <br /><8.1 <br /><4.6 <br /><4.7 <br /><4.8 <br /><4.8 <br /><4.3 <br /><6.9 <br />Vinyl Chloride <0.5 <br /><0.5 <br /><1.2 <br />120 <br /><1.2 <br /><1.2 <br /><1.2 <br /><1.2 <br /><1.1 <br /><0.69 <br />1,3-Butadien( NT <br />NT <br /><1.2 <br /><2.0 <br /><1.2 <br /><1.2 <br /><1.2 <br /><1.2 <br /><1.1 <br /><0.69 <br />Bromomethat <0.5 <br /><0.5 <br /><1.2 <br /><2.0 <br /><1.2 <br /><1.2 <br /><1.2 <br /><1.2 <br /><1.1 <br /><6.9 <br />Chloroethane <0.5 <br /><0.5 <br /><1.2 <br /><2.0 <br /><1.2 <br /><1.2 <br /><1.2 <br /><1.2 <br /><4.3 <br /><2.8 <br />Freon 11 <br />29 <br />4.4 <br />19 <br />170 <br />39 <br />15 <br />8.4 <br />9.2 <br />9.9 <br />56 <br />Ethanol <br />NT <br />NT <br />5.3 <br /><8.1 <br /><4.6 <br /><4.7 <br /><4.8 <br />9.6 <br />85 <br /><2.8 <br />Freon 113 <br />1.8 <br /><0.5 <br /><1.2 <br />18 <br />2.3 <br />1.2 <br /><1.2 <br /><1.2 <br /><1.1 <br />4.6 <br />1,1-Dichloroe <br /><0.5 <br /><0.5 <br /><1.2 <br />3.1 <br /><1.2 <br /><1.2 <br /><1.2 <br /><1.2 <br /><1.1 <br /><0.69 <br />Acetone <br />6.8 <br />8 <br />50 <br />12 <br /><4.6 <br />6.4 <br />6.6 <br />5.3 <br />4.2* <br /><6.9 <br />2 -Propanol <br />NT <br />NT <br /><4.8 <br /><8.1 <br /><4.6 <br /><4.7 <br /><4.8 <br /><4.8 <br /><4.3 <br /><2.6 <br />Carbon Disul* <br /><0.5 <br /><0.5 <br /><1.2 <br /><2.0 <br /><1.2 <br /><1.2 <br /><1.2 <br /><1.2 <br />5.0 <br /><2.8 <br />3-Chloroprop <br />NT <br />NT <br /><4.8 <br /><8.1 <br /><4.6 <br /><4.7 <br /><4.8 <br /><4.8 <br /><4.3 <br /><2.8 <br />Methylene C1 <br /><1.0 <br /><1.0 <br /><1.2 <br /><2.0 <br /><1.2 <br /><1.2 <br /><1.2 <br />2.0 <br /><1.1 <br /><6.9 <br />Methyl tert-bL <br />NT <br />NT <br /><1.2 <br /><2.0 <br /><1.2 <br /><1.2 <br /><1.2 <br /><1.2 <br /><1.1 <br /><0.69 <br />trans -1,2 -Dict <br />NT <br />NT <br /><1.2 <br /><2.0 <br /><1.2 <br /><1.2 <br /><1.2 <br /><1.2 <br /><1.1 <br /><0.69 <br />Hexane <br /><1.0 <br /><1.0 <br /><1.2 <br />32 <br /><1.2 <br /><1.2 <br /><1.2 <br /><1.2 <br /><1.1 <br /><0.69 <br />1,1-Dich oroe <br /><0.5 <br /><0.5 <br /><1.2 <br /><2.0 <br /><1.2 <br /><1.2 <br /><1.2 <br /><1.2 <br /><1.1 <br /><0.69 <br />2-Butanone (1 <br />8.8 <br />4.8 <br />4.5 <br /><2.0 <br /><1.2 <br /><1.2 <br />1.7 <br /><1.2 <br /><4.3 <br /><2.8 <br />cis -1 ichlc <br /><0.5 <br /><0.5 <br /><1.2 <br /><2.0 <br /><1.2 <br /><1.2 <br /><1.2 <br /><1.2 <br /><1.1 <br /><0.69 <br />,2- <br />�n r, <br />77 <br /><I <br /><2 n <br /><1.2 <br /><1.2 <br /><1.2 <br /><1.2 <br /><1.1 <br /><0.69 <br />Chloroform <br /><0.5 <br /><0.5 <br /><1.2 <br /><2.0 <br /><1.2 <br /><1.2 <br /><1.2 <br /><1.Z <br /><1.1 <br />9.b <br />1,1,1-Trichlor <br /><0.5 <br /><0.5 <br /><1.2 <br /><2.0 <br /><1.2 <br /><1.2 <br /><1.2 <br /><1.2 <br /><1.1 <br /><0.69 <br />Cyclohexane <br /><1.0 <br /><1.0 <br /><1.2 <br />15 <br /><1.2 <br /><1.2 <br /><1.2 <br /><1.2 <br /><1.1 <br /><0.69 <br />Carbon Tetra <br /><0.5 <br /><0.5 <br /><1.2 <br /><2.0 <br /><1.2 <br /><1.2 <br /><1.2 <br /><1.2 <br /><1.1 <br /><0.69 <br />2.2.4-Trimeth <br /><1.0 <br /><1.0 <br /><1.2 <br />28 <br /><1.2 <br /><1.2 <br /><1.2 <br /><1.2 <br /><1.1 <br /><0.69 <br />