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M M ® ! M i ® i ® ® i <br /> HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br /> UNSATURATED ZONE SOIL GAS <br /> HARNEY LANE SANITARY LANDFILL <br /> WEST HEADER(TPH 1,6) <br /> Sample Type: Air <br /> Sampling Date 1/28/10 7/19/10 1/24/11 7/15/11 4/12/12 <br /> Monitoring and Field Parameters <br /> Methane Concentration (percent) NA NA 26.4 21.5 18.7 <br /> Carbon Dioxide (percent) NA NA 28.3 23.5 21.7 <br /> Oxygen (percent) NA NA 0.3 0.5 2.4 <br /> Volatile Organic Compounds PPB (v/v) 7/28/11 <br /> Freon 12 350 260 550 120 250 <br /> Freon 114 57 45 68 46 43 <br /> Chloromethane <120 <84 220 <92 <300 <br /> Vinyl Chloride 180 200 340 150 190 <br /> 1,3-Butadiene <30 <21 <19 <23 <30 <br /> Bromomethane <30 <21 <19 <23 <300 <br /> Chloroethane 200 180 270 92 130 <br /> Freon 11 <30 25 37 <23 <30 <br /> Ethanol 7300 4700 6700 1200 610 <br /> Freon 113 <30 <21 <19 <23 <30 <br /> 1,1-Dichloroethene <30 <21 <19 <23 <30 <br /> Acetone 1800 1900 2800 680 1200 <br /> 2-Propanol 2900 2800 4300 1000 1100 <br /> Carbon Disulfide <30 <21 <19 <92 <120 <br /> 3-Chloropropene <120 <84 <78 <92 <120 <br /> Methylene Chloride 300 190 300 66 <300 <br /> Methyl tert-butyl ether <30 <21 <19 <23 <30 <br /> trans-1,2-dichloroethene <30 <21 <19 <23 <30 <br /> Hexane 900 880 1400 660 720 <br /> 1,1-Dichloroethane 69 54 89 <23 44 <br /> 2-butanone (Methyl Ethyl Ketone) 3300 3500 5000 1100 2000 <br /> cis-1,2-Dichloroethene 830 890 1200 810 820 <br /> Tetrahydrofuran 2400 2100 3900 1300 2000 <br /> Chloroform <30 <21 <19 <23 <30 <br /> 1,1,1-Trichloroethane <30 <21 <19 <23 <30 <br /> Cyclohexane 700 730 1000 570 560 <br /> Carbon Tetrachloride <30 <21 <19 <23 <30 <br /> 2,2,4-Trimethylpentane 500 460 720 320 380 <br /> Benzene 490 490 700 340 380 <br /> 1,2-Dichloroethane <30 <21 26 <23 <30 <br />