An official website of the United States government.

We've made some changes to If the information you are looking for is not here, you may be able to find it on the EPA Web Archive or the January 19, 2017 Web Snapshot.

Metallic Mineral Processing Plants New Source Performance Standards (NSPS)

On this page:

Rule Summary

The provisions of this subpart are applicable to the following affected facilities in metallic mineral processing plants:

Each crusher and screen in open-pit mines; each crusher, screen, bucket elevator, conveyor belt transfer point, thermal dryer, product packaging station, storage bin, enclosed storage area, truck loading station, truck unloading station, railcar loading station, and railcar unloading station at the mill or concentrator with the following exceptions.

All facilities located in underground mines are exempted from the provisions of this subpart. At uranium ore processing plants, all facilities subsequent to and including the beneficiation of uranium ore are exempted from the provisions of this subpart. An affected facility under this section that commences construction or modification after August 24, 1982, is subject to the requirements of this part.

Rule History

02/21/1984 – Final Rule

08/24/1982 – Proposed Rule


Applicability Determination Index (ADI).  The ADI is maintained by EPA's Office of Enforcement and Compliance Assurance (OECA) and provides a data base of memoranda dealing with applicability issues.  The database is searchable by Subpart.