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M M ® ® ® ® M ® ® ® ® M M ® ® M <br />HISTORICAL SUMMARY OF ANALYI <br />UNSATURATED ZONE SOIL GAS <br />FOOTHILL SANITARY LANDFILL <br />SG -1 <br />Sample Type: Air <br />Sampling Date 1/22/09 7/15/09 3/2/10 9/3/10 1/25/11 7/29/11 4/12/12 8/7/12 1/28/13 9/11/13 3/18/14 <br />Monitoring and Field Parameters <br />Methane concentration (percent) <br />0.5 <br />0.7 <br />0.4 <br />0.2 <br />0.5 <br />0.5 <br />0.4 <br />0.5 <br />0.4 <br />0 <br />0.4 <br />Carbon Dioxide (percent) <br />0.5 <br />0.5 <br />0.9 <br />0.3 <br />0.4 <br />0.5 <br />0.4 <br />0.4 <br />0.5 <br />0 <br />0.3 <br />Oxygen (percent) <br />18.9 <br />16.6 <br />19.3 <br />19.4 <br />17.8 <br />16.3 <br />18.4 <br />18.5 <br />18.7 <br />20.6 <br />19.5 <br />Bromomethane <br /><110 <br /><240 <br /><250 <br /><4.8 <br /><150 <br /><52 <br /><3200 <br /><1600 <br /><1800 <br /><18 <br /><2300 <br />Volatile Organic Compounds PPB (v/v) <br />150 <br /><240 <br /><250 <br />170 <br /><150 <br /><210 <br /><1300 <br /><640 <br /><710 <br /><71 <br /><930 <br />Freon 12 <br /><110 <br /><240 <br /><250 <br />44 <br /><150 <br /><52 <br /><320 <br /><160 <br /><180 <br /><1.8 <br /><230 <br />Freon 114 <br /><110 <br /><240 <br /><250 <br />6.1 <br /><150 <br /><52 <br /><320 <br /><160 <br /><180 <br /><1.8 <br /><230 <br />Chloromethane <br /><450 <br /><960 <br /><990 <br />64 <br /><610 <br /><210 <br /><3200 <br /><640 <br /><1800 <br /><18 <br /><930 <br />Vinyl Chloride <br />570 <br />560 <br />440 <br />620 <br />310 <br />130 <br />840 <br />450 <br />480 <br />2.3 <br />580 <br />1,3 -Butadiene <br /><110 <br /><240 <br /><250 <br /><4.8 <br /><150 <br /><52 <br /><320 <br /><160 <br /><180 <br /><1.8 <br /><230 <br />Bromomethane <br /><110 <br /><240 <br /><250 <br /><4.8 <br /><150 <br /><52 <br /><3200 <br /><1600 <br /><1800 <br /><18 <br /><2300 <br />Chloroethane <br />150 <br /><240 <br /><250 <br />170 <br /><150 <br /><210 <br /><1300 <br /><640 <br /><710 <br /><71 <br /><930 <br />Freon 11 <br /><110 <br /><240 <br /><250 <br /><4.8 <br /><150 <br /><52 <br /><320 <br /><160 <br /><180 <br /><1.8 <br /><230 <br />Ethanol <br /><450 <br /><960 <br /><990 <br /><19 <br /><610 <br /><210 <br />1400 <br /><640 <br /><710 <br />7.7 <br /><930 <br />Freon 113 <br /><110 <br /><240 <br /><250 <br /><4.8 <br /><150 <br /><52 <br /><320 <br /><160 <br /><180 <br /><1.8 <br /><230 <br />1,1-Dichloroethene <br /><110 <br /><240 <br /><250 <br /><4.8 <br /><150 <br /><52 <br /><320 <br /><160 <br /><180 <br /><18 <br /><230 <br />Acetone <br /><450 <br /><960 <br /><990 <br />23 <br /><610 <br />280 <br /><3200 <br /><1600 <br />2000 <br /><18 <br /><2300 <br />2 -Propanol <br /><450 <br /><960 <br /><990 <br /><19 <br /><610 <br />720 <br /><1300 <br /><640 <br /><710 <br /><71 <br /><930 <br />Carbon Disulfide <br /><110 <br /><240 <br /><250 <br />160 <br /><150 <br />230 <br />1400 <br />960 <br /><710 <br /><7.1 <br /><930 <br />3-Chloropropene <br /><450 <br /><960 <br /><990 <br /><19 <br /><610 <br /><210 <br /><1300 <br /><640 <br /><710 <br /><71 <br /><930 <br />Methylene Chloride <br /><110 <br /><240 <br /><250 <br /><4.8 <br /><150 <br /><52 <br /><3200 <br /><1600 <br /><1800 <br /><18 <br /><2300 <br />Methyl tert-butyl ether <br /><110 <br /><240 <br /><250 <br /><4.8 <br /><150 <br /><52 <br /><320 <br /><160 <br /><180 <br /><1.8 <br /><230 <br />trans-1,2-Dichloroethene <br /><110 <br /><240 <br /><250 <br /><4.8 <br /><150 <br /><52 <br /><320 <br /><160 <br /><180 <br /><1.8 <br /><230 <br />Hexane <br /><110 <br /><240 <br /><250 <br />4.8 <br /><150 <br /><52 <br /><320 <br /><160 <br /><180 <br /><1.8 <br /><230 <br />1,1-Dichloroethane <br /><110 <br /><240 <br /><250 <br /><4.8 <br /><150 <br /><52 <br /><320 <br /><160 <br /><180 <br /><1.8 <br /><230 <br />2-Butanone (Methyl Ethyl Ketone) <br /><110 <br /><240 <br /><250 <br /><4.8 <br /><150 <br /><210 <br /><1300 <br /><640 <br /><710 <br /><7.1 <br /><930 <br />cis-1,2-Dichloroethene <br /><110 <br /><240 <br /><250 <br /><4.8 <br /><150 <br /><52 <br /><320 <br /><160 <br /><180 <br /><1.8 <br /><230 <br />Tetrahydrofuran <br /><110 <br /><240 <br /><250 <br /><4.8 <br /><150 <br /><52 <br /><320 <br /><160 <br /><180 <br /><1.8 <br /><230 <br />Chloroform <br /><110 <br /><240 <br /><250 <br /><4.8 <br /><150 <br /><52 <br /><320 <br /><160 <br /><180 <br /><1.8 <br /><230 <br />1,1,1 -Trichloroethane <br /><110 <br /><240 <br /><250 <br /><4.8 <br /><150 <br /><52 <br /><320 <br /><160 <br /><180 <br /><1.8 <br /><230 <br />Cyclohexane <br /><110 <br /><240 <br /><250 <br /><4.8 <br /><150 <br /><52 <br /><320 <br /><160 <br /><180 <br /><1.8 <br /><230 <br />Carbon Tetrachloride <br /><110 <br /><240 <br /><250 <br /><4.8 <br /><150 <br /><52 <br /><320 <br /><160 <br /><180 <br /><1.8 <br /><230 <br />2,2,4-Trimethylpentane <br /><110 <br /><240 <br /><250 <br /><4.8 <br /><150 <br /><52 <br /><320 <br /><160 <br /><180 <br /><1.8 <br /><230 <br />Benzene <br /><110 <br /><240 <br /><250 <br />15 <br /><150 <br /><52 <br /><320 <br /><160 <br /><180 <br /><1.8 <br /><230 <br />