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• • • <br />HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br />UNSATURATED ZONE AIR <br />NORTH COUNTY SANITARY LANDFILL <br />SG -8 Shallow <br />Sample Type: Air <br />Sampling Date 7/28/08 1/30/09 7/14/09 1/29/10 <br />Monitoring and Field Parameters <br />-M efh-a-ne Concentration (percent) 0 0 0 0 <br />Carbon Dioxide (percent) 2.4 2 1.8 2.2 <br />12.8 14.3 15 16.5 <br />Volatile Organic Compounds PPB (v/v) <br /><4.5 <br />Acetone <br />25 <br />7.5 <br />8 <br /><4.5 <br />Alpha-Chlorotoluene <br /><1.1 <br /><1.2 <br /><1.2 <br /><1.1 <br />Benzene <br /><1.1 <br /><1.2 <br /><1.2 <br /><1.1 <br />Bromodichloromethane <br /><1.1 <br /><1.2 <br /><1.2 <br /><1.1 <br />Bromoform <br /><1.1 <br /><1.2 <br /><1.2 <br /><1.1 <br />_ Benzyl hloride <br />Bromomethane <br /><1.1 <br /><1.2 <br /><1.2 <br /><1.1 <br />Carbon Disulfide <br /><1.1 <br /><1.2 <br /><1.2 <br /><1.1 <br />1,3-13utadiene <br />2-6utanone <br /><1.1 <br />2.2 <br /><1.2 <br />2.7 <br /><1.2 <br />2.3 <br /><1.1 <br /><1.1 <br />Car on Tetrachloride <br />- Chforobenzene <br /><1.1 <br /><1.2 <br /><1.2 <br /><1.1 <br />Chloroethane <br /><1.1 <br /><1.2 <br /><1.2 <br /><1.1 <br />Chloromethane <br /><4.5 <br />3-Chlhloropropene <br /><4.5 <br /><4.8 <br /><4.8 <br /><4.5 <br />_ <br />Cumeme <br /><1.1 <br /><1.2 <br /><1.2 <br /><1.1 <br />1,2-Dibromoethane <br />-- 1,2-D0chloropropane <br /><1.1 <br />< .2 <br /><1.2 <br /><1.1 <br />Dibromochloromethane <br /><1.1 <br /><1.2 <br /><1.2 <br /><1.1 <br />1,2 -Dichlorobenzene <br /><1.1 <br /><1.2 <br /><1.2 <br /><1.1 <br />1,3 -Dichlorobenzene <"i • "� -- -I,/- I- i •/- ` 1 •' <br />EEEDic4-Dichorobenzene <1.1 <2hlorodifluoromethane <1.1 <1.2 <1.2 <1.1 <br /><1 1 <1.2 <1.2 <1.1 <br />