[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: 40CFR418.11]



[Page 339-340]

 

                   TITLE 40--PROTECTION OF ENVIRONMENT

 

         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)

 

PART 418_FERTILIZER MANUFACTURING POINT SOURCE CATEGORY--Table of Contents

 

                     Subpart A_Phosphate Subcategory

 

Sec.  418.11  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 wastewater 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 

wastewater'' does not include contaminated non-process wastewater, as 

defined below.

    (c) The term, contaminated non-process wastewater 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



[[Page 340]]



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 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 

24-hour 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 in effect as of the effective date of 

this regulation.

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

24-hour 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 in effect, as of the effective date of 

this regulation.

    (f) The term calcium sulfate storage pile runoff shall mean the 

calcium sulfate transport water runoff from or through the calcium 

sulfate pile, and the precipitation which falls directly on the storage 

pile and which may be collected in a seepage ditch at the base of the 

outer slopes of the storage pile, provided such seepage ditch is 

protected from the incursion of surface runoff from areas outside of the 

outer perimeter of the seepage ditch.



[39 FR 12836, Apr. 8, 1974, as amended at 41 FR 20583, May 19, 1976]