[Code of Federal Regulations]

[Title 40, Volume 28]

[Revised as of July 1, 2006]

From the U.S. Government Printing Office via GPO Access

[CITE: 40CFR422.41]



[Page 637-638]

 

                   TITLE 40--PROTECTION OF ENVIRONMENT

 

         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)

 

PART 422_PHOSPHATE MANUFACTURING POINT SOURCE CATEGORY--Table of Contents

 

           Subpart D_Defluorinated Phosphate Rock Subcategory

 

Sec.  422.41  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 process waste water means any water which, during 

manufacturing or processing, comes into direct contact with or results 

from the production or use of any raw material, intermediate product, 

finished product, by-product, or waste product. The term ``process waste 

water'' does not include contaminated nonprocess waste water, as defined 

below.

    (c) The term contaminated non-process waste water shall mean any 

water including precipitation runoff, which during manufacturing or 

processing, comes into incidental contact with any raw material, 

intermediate product, finished product, by-product or waste product by 

means of: (1) Precipitation runoff, (2) accidental spills, (3) 

accidental leaks caused by the failure of process equipment and which 

are repaired or the discharge of pollutants therefrom contained or 

terminated within the shortest reasonable time which shall not exceed 24 

hours after discovery or when discovery should reasonably have been 

made, whichever is earliest, and (4) discharges from safety showers and 

related personal safety equipment, and from equipment washings for the 

purpose of safe entry, inspection and maintenance; Provided, That all 

reasonable measures have been taken to prevent, reduce, eliminate and 

control to the maximum extent feasible such contact and provided further 

that all reasonable measures



[[Page 638]]



have been taken that will mitigate the effects of such contact once it 

has occurred.

    (d) The term ten-year 24-hour rainfall event shall mean the maximum 

precipitation event with a probable recurrence interval of once in 10 

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.

    (e) The term 25-year 24-hour rainfall event shall mean the maximum 

precipitation event with a probable recurrence interval of once in 25 

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.