TOKYO—Denka Performance Elastomers L.L.C. (DPE) has filed a lawsuit against the Environmental Protection Agency, Japanese parent group Denka Co. Ltd. announced Jan. 13.
Through the lawsuit, filed Jan. 11 in the U.S. District Court for the District of Louisiana, DPE is seeking a review of the agency's toxicity assessment of chloroprene monomer.
In its statement, Denka said that, since its acquisition of the chloroprene rubber manufacturing business from DuPont in 2015, its subsidiary had "consistently operated" in compliance with regulatory emissions standards.
DPE, it insisted, "regularly measures the concentration of substances in the atmosphere" around its plants and provides information on environmental measures to local residents and other stakeholders.
The rubber maker, it added, has invested over $35 million and introduced equipment at its LaPlace, La., plant to reduce chloroprene monomer emissions by 85 percent compared to 2014.