40 CFR Chapter 1 Part 63 (Section 63.8980 to 63.11499/End) continues coverage on the United States Environmental Protection Agency. In this volume, you will find rules, processes, procedures, and regulations relating to air programs, including national emission standards for hazardous air pollutants for source categories, including hydrochloric acid production refractory manufacturing, primary magnesium refining and more. Within these source categories information relating to manufacturing plants, emissions limitations, work practice standards, compliance requirements, installation, operations, maintenance, performance tests and testing, general provisions, notifications, reports, records, and more can be found. Code of Federal Regulations Title 40, Volume 15, July 1, 2015 Containing parts Part 63, § 63.8980 to end of part 63 Part 63; NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS FOR SOURCE CATEGORIES (CONTINUED)