CFR > Title 40 > Chapter I > Subchapter C > Part 60 > Subpart NN CFR > Title 40 > Chapter I > Subchapter C > Part 60 > Subpart NN – Standards of Performance for Phosphate Rock Plants Current as of: 2024 | Check for updates | Other versions § 60.400 Applicability and designation of affected facility § 60.401 Definitions § 60.402 Standard for particulate matter § 60.403 Monitoring of emissions and operations § 60.404 Test methods and procedures