States Back Environmentalists’ Bid To Preserve IRIS’ EtO Value For Air Rules

State regulators are joining environmentalists in urging EPA to continue using strict risk values for ethylene oxide (EtO), developed by its embattled Integrated Risk Information System (IRIS) program, in its air toxics rules for hydrochloric acid (HCl) plants, though the states stop short of threatening to sue over the issue as environmentalists are. In its March 28 comments , the National Association of Clean Air Agencies (NACAA), representing air regulators from 41 states, says “it is correct and appropriate for...