[Code of Federal Regulations] [Title 40, Volume 26] [Revised as of July 1, 2003] From the U.S. Government Printing Office via GPO Access [CITE: 40CFR411.10] [Page 191] TITLE 40-PROTECTION OF ENVIRONMENT CHAPTER I-ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 411-CEMENT MANUFACTURING POINT SOURCE CATEGORY--Table of Contents Subpart A-Nonleaching Subcategory Sec. 411.10 Applicability; description of the nonleaching subcategory. The provisions of this subpart are applicable to discharges resulting from the process in which several mineral ingredients (limestone or other natural sources of calcium carbonate, silica, alumina, and iron together with gypsum) are used in the manufacturing of cement and in which kiln dust is not contracted with water as an integral part of the process and water is not used in wet scrubbers to control kiln stack emissions.