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Table 1 <br />VOLATILE ORGANIC COMPOUNDS SPECIFIED IN ARB GUIDELINES <br />Detection Limits (ppb) <br />Compound Air Landfill Gas <br />Chloroethene (vinyl chloride) <br />2 <br />500 <br />Benzene <br />2 <br />500 <br />1,2-Dibromoethene (ethylene dibromide) <br />0.5 <br />1 <br />1,2-Dichloroethene (ethylene dichloride) <br />0.2 <br />20 <br />Dichloromethane (methylene chloride) <br />1 <br />60 <br />Tetrachloroethene (perchloroethylene) <br />0.2 <br />10 <br />Tetrachloromethane carbon tetrachloride <br />0.2 <br />5 <br />1,1,1 -Trichloroethane (methyl chloroform) <br />0.5 <br />10 <br />Trichloroethylene <br />0.6 <br />10 <br />Trichloromethane (chloroform) <br />0.8 <br />2 <br />. �] <br />2 <br />