[Code of Federal Regulations] [Title 40, Volume 29] [Revised as of July 1, 2007] From the U.S. Government Printing Office via GPO Access [CITE: 40CFR436.180] [Page 354] TITLE 40--PROTECTION OF ENVIRONMENT CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 436_MINERAL MINING AND PROCESSING POINT SOURCE CATEGORY --Table of Contents Subpart R_Phosphate Rock Subcategory Sec. 436.180 Applicability; description of the phosphate rock subcategory. Authority: Sec. 306, Federal Water Pollution Control Act, as amended. The provisions of this subpart are applicable to the mining and the processing of phosphate bearing rock, ore or earth for the phosphate content. [43 FR 9809, Mar. 10, 1978]