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HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br /> UNSATURATED ZONE SOIL GAS <br /> HARNEY LANE SANITARY LANDFILL <br /> EAST HEADER <br /> Sample Type:Air <br /> Sampling Date 1/28/10 7/19/10 1/24/11 7/28/11 4/12/12 <br /> Monitoring and Field Parameters <br /> Methane Concentration(percent) NA NA 26.9 27 27.7 <br /> Carbon Dioxide(percent) NA NA 26.8 23.5 24.4 <br /> Oxygen(percent) NA NA 0 0.7 0.4 <br /> Volatile Organic Compounds PPB(v/v) <br /> Freon 12 580 <5.7 320 380 240 <br /> Freon 114 140 <5.7 120 90 82 <br /> Chloromethane <110 <23 <45 <29 <83 <br /> Vinyl Chloride 680 <5.7 800 420 430 <br /> 1,3-Butadiene <28 <5.7 <11 <7.2 <8.3 <br /> Bromomethane <28 <5.7 <11 <7.2 <83 <br /> Chloroethane 50 <5.7 51 <29 <33 <br /> Freon 11 <28 <5.7 <11 <7.2 <8.3 <br /> Ethanol 3700 <23 500 340 <33 <br /> Freon 113 <28 <5.7 <11 <7.2 <8.3 <br /> 1,1-Dichloroethene <28 <5.7 <11 <7.2 <8.3 <br /> Acetone 150 <23 340 55 <83 <br /> 2-Propanol <110 <23 87 <29 <33 <br /> Carbon Disulfide <28 <5.7 16 <29 <33 <br /> 3-Chloropropene <110 <23 <45 <29 <33 <br /> Methylene Chloride <28 <5.7 19 12 <83 <br /> Methyl tert-butyl ether <28 <5.7 <11 <7.2 <8.3 <br /> trans-1,2-dichloroethene <28 <5.7 <11 <7.2 <8.3 <br /> Hexane 510 <5.7 640 380 390 <br /> 1,1-Dichloroethane <28 <5.7 <11 <7.2 <8.3 <br /> 2-butanone(Methyl Ethyl Ketone) 120 <5.7 350 49 70 <br /> cis-1,2-Dichloroethene 88 <5.7 140 67 80 <br />