[Code of Federal Regulations]
[Title 40, Volume 27]
[Revised as ofJuly 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR436.181]

[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. 436.181  Specialized definitions.

    For the purpose of this subpart:
    (a) Except as provided below, the general definitions, abbreviations 
and methods of analysis set forth in 40 CFR part 401 shall apply to this 
subpart.
    (b) The term ``mine dewatering'' shall mean any water that is 
impounded or that collects in the mine and is pumped, drained or 
otherwise removed from the mine through the efforts of the mine 
operator.
    (c) The term ``10-year 24-hour precipitation event'' shall mean the 
maximum 24 hour precipitation event with a probable reoccurrence 
interval of once in 10 years. This information is available in ``Weather 
Bureau Technical Paper No. 40,'' May 1961 and ``NOAA Atlas 2,'' 1973 for 
the 11 Western States, and may be obtained from the National Climatic 
Center of the Environmental Data Service, National Oceanic and 
Atmospheric Administration, U.S. Department of Commerce.
    (d) The term ``mine'' shall mean an area of land, surface or 
underground, actively used for or resulting from the extraction of a 
mineral from natural deposits.
    (e) The term ``process generated waste water'' shall mean any waste 
water used in the slurry transport of mined material, air emissions 
control, or processing exclusive of mining. The term shall also include 
any other water which becomes commingled with such waste water in a pit, 
pond lagoon, mine, or other facility used for settling or treatment of 
such waste water.

[43 FR 9809, Mar. 10, 1978]