Air Plan Approval; Maryland; Update to Materials Incorporated by Reference

The Environmental Protection Agency (EPA) is updating the materials that are incorporated by reference (IBR) into the Maryland state implementation plan (SIP). The regulations affected by this update have been previously submitted by the Maryland Department of the Environment (MDE) and approved by EPA. This update affects the SIP materials that are available for public inspection at the National Archives and Records Administration (NARA) and the EPA Regional Office.