EPA Finalizes Revisions to Montana's Regional Haze Federal Implementation Plan

Summary

The Environmental Protection Agency (EPA) is finalizing revisions to the Federal Implementation Plan (FIP) for regional haze in Montana, addressing a cement kiln owned by Oldcastle Materials Cement Holdings, Inc. The EPA is revising the nitrogen oxides emission limit for the Trident cement kiln, following a request from Oldcastle and new information that was not available at the time the original FIP was promulgated.