[Code of Federal Regulations] [Title 40, Volume 27] [Revised as ofJuly 1, 2003] From the U.S. Government Printing Office via GPO Access [CITE: 40CFR436.180] [Page 358] 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]