In 2009, the Taiwanese Environmental Protection Administration Executive Yuan (EPA) found that the soil and the groundwater in the area close to Formosa Plastics' Renwu Plant has been polluted by benzene, chloroform, dichloromethane, 1,1,2-Trichloroethane, 1,1-dichloroethylene, tetrachloroethylene, trichloroethylene, and vinylchloride.