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HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br /> UNSATURATED ZONE SOIL GAS <br /> HARNEY LANE SANITARY LANDFILL <br /> GW-91 <br /> Sample Type:Air <br /> Sampling Date 1/28/10 7/19/10 1/24/11 7/28/11 4/12/12 8/7/12 1/30/13 <br /> Monitoring and Field Parameters <br /> Methane Concentration(percent) 0.0 NA 0 _0 0 0 0 <br /> Carbon Dioxide(p(Wcent) 2.4 NA 2.8 2.7 1.9 0.8 1.3 <br /> Oxygen(percent) 18 NA 16.2 16.8 18.2 19.7 19.5 <br /> Volatile Organic Compounds PPB(v/v) <br /> Freon 12 <1.1 0.93 <1.2 <1.2 1.4 1.8 <1.1 <br /> Freon 114 <1.1 <0.82 <1.2 <1.2 <0.74 <0.70 <1.1 <br /> Chloromethane <4.4 <3.3 <4.7 <4.8 <7.4 <2.8 <11 <br /> Vinyl Chloride <1.1 <0.82 <1.2 <1.2 <0.74 <0.70 <1.1 <br /> 1,3-Butadiene <1.1 <0.82 <1.2 <1.2 <0.74 <0.70 <1.1 <br /> Bromomethane <1.1 <0.82 <1.2 <1.2 <7.4 <7.0 <11 <br /> Chloroethane _ <1.1 <0.82 <1.2 <4.8 <2.9 <2.8 <4.3 <br /> Freon 11 <1.1 <0.82 <1.2 <1.2 <0.74 <0.70 <1.1 <br /> Ethanol _ 5.8 28 26 310 <2.9 80 <4.3 <br /> Freon 113 _<1.1 <0.82 <1.2 <1.2 <0.74 <0.70 <1.1 <br /> 1,1-Dichloroethene <1.1 <0.82 <1.2 <1.2 <0.74 <0.70 <1.1 <br /> Acetone 4.8 13 9.8 13 <7.4 10 <11 <br /> 2-Propanol -- <4.4 <3.3 <4.7 <4.8 <2.9 <2.8 <4.3 <br /> Carbon_Disulfide 10 1.9 <1.2 <4.8 <2.9 9.0 <4.3 <br /> 3-Chloropropene <4.4 <3.3 <4.7 <4.8 <2.9 <2.8 <4.3 <br /> Methylene_Chloride <1.1 <0.82 <1.2 <1.2 <7.4 <7.0 <11 <br /> Methyl tert-butyl ether <1.1 <0.82 <1.2 <1.2 <0.74 <0.70 <1.1 <br /> trans-1,2-dichlo_ro_e_thene <1.1 <0.82 <1.2 <1.2 <0.74 <0.70 <1.1 _ <br /> Hexane <1.1 <0.82 <1,2 <1.2 <0.74 0.85 <1.1 <br /> 1,1-Dichloroethane _ <1.1 <0.82 <1.2 <1.2 <0.74 _<0.70 <1.1 <br /> buta <br /> 2- none(Methyl Ethyl Ketone) 7.2 63 4.6 14 <2.9 58 _ 4.7 <br /> cis-1,2-Dichloroethene <1.1 <0.82 <1.2 <1.2 <0.74 <0.70 <1.1 <br />