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U.S. Code of Federal Regulations
Regulations most recently checked for updates: Aug 27, 2025
All Titles
Title 40
Chapter I
Part 60
Subpart NN - Subpart NN—Standards of Performance for Phosphate Rock Plants
§ 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.
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