Air Plan Approval; WA; Updates to Materials Incorporated by Reference

The Environmental Protection Agency (EPA) is updating the materials that are incorporated by reference (IBR) into the Washington State Implementation Plan (SIP). The regulations affected by this update have been previously submitted by the Washington State Department of Ecology (Ecology) and approved by the EPA. In this action, the EPA is also notifying the public of corrections to typographical errors and rearranging the contents for clarity. 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.