[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: 40CFR411.31]

[Page 194]
 
                TITLE 40-PROTECTION OF ENVIRONMENT
 
      CHAPTER I-ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 411-CEMENT MANUFACTURING POINT SOURCE CATEGORY--Table of Contents
 
       Subpart C-Materials Storage Piles Runoff Subcategory
 
Sec. 411.31  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 10 year, 24 hour rainfall event shall mean a rainfall 
event with a probable recurrence interval of once in ten years as 
defined by the National Weather Service in Technical Paper No. 40, 
``Rainfall Frequency Atlas of the United 
States,'' May 1961, and subsequent amendments, or 
equivalent regional or state rainfall probability information developed 
therefrom.