| http://www.w3.org/ns/prov#value | - Sampling from the gas collection system detected 35 chemicals, including the recognized human carcinogens benzene and vinyl chloride and the suspected human carcinogens methylene chloride, chloroform, 1,2-dichloroethane, bromodichloromethane, tetrachloroethylene, 1,4-dichlorobenzene, 1,2-dibromoethane, and carbon tetrachloride.
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