[Code of Federal Regulations] [Title 40, Volume 27] [Revised as ofJuly 1, 2003] From the U.S. Government Printing Office via GPO Access [CITE: 40CFR458.20] [Page 509] TITLE 40--PROTECTION OF ENVIRONMENT CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 458--CARBON BLACK MANUFACTURING POINT SOURCE CATEGORY--Table of Contents Subpart B--Carbon Black Thermal Process Subcategory Sec. 458.20 Applicability: description of the carbon black thermal process subcategory. The provisions of this subpart are applicable to discharges resulting from the production of carbon black by the thermal process.