APDG 6472v1 - Guidance for Rescission of the Environmental Protection Agency’s “Once In, Always In (OIAI)” Policy for Maximum Achievable Control Technology (MACT) Standards

APDG 6472v1 - Guidance for Rescission of the Environmental Protection Agency’s “Once In, Always In (OIAI)” Policy for Maximum Achievable Control Technology (MACT) Standards, revised 11/18