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SCS ENGINEERS- <br /> TABLE 2. ANALYTICAL DETECTION LIMITS FOR LFG TRACE CONSTITUENTS <br /> Compound Detection <br /> Limits (ppb) <br /> Chloroethene (Vinyl Chloride) 500 <br /> Benzene 500 <br /> 1 ,2-Dibromoethane (Ethylene Dibromide) 1 <br /> 1,2-Dichloroethane (Ethylene Dichloride) 20 <br /> Dichloromethane (Methylene Chloride) 60 <br /> Tetrachloroethene (Perchloroethylene) 10 <br /> Tetrachloromethane (Carbon Tetrachloride) 5 <br /> 1,1 ,1-Trichloroethane (Methyl Chloroform) 10 <br /> Trichloroethylene 10 <br /> Trichloromethane (Chloroform) 2 <br /> Note: Sampling to be performed only if field testing indicates subsurface methane <br /> levels exceed the LEL on two successive events. <br /> 12 <br />