[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: 40CFR421.63]



[Page 480]

 

                   TITLE 40--PROTECTION OF ENVIRONMENT

 

         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)

 

PART 421_NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORY--Table 

of Contents

 

                 Subpart F_Secondary Copper Subcategory

 

Sec.  421.63  Effluent limitations guidelines representing the degree of 

effluent reduction attainable by the application of the best available 

technology economically achievable.



    Except as provided in 40 CFR 125.30 through 125.32, any existing 

point source subject to this subpart shall achieve the following 

effluent limitations representing the degree of effluent reduction 

attainable by the application of the best available technology 

economically achievable:

    (a) Subject to the provisions of paragraph (b) of this section, 

there shall be no discharge of process wastewater pollutants into 

navigable waters.

    (b) a process wastewater impoundment which is designed, constructed, 

and operated so as to contain the precipitation from the 25-year, 24-

hour rainfall event as established by the National Climatic Center, 

National Oceanic and Atmospheric Administration, for the area in which 

such impoundment is located may discharge that volume of process 

wastewater which is equivalent to the volume of precipitation that falls 

within the impoundment in excess of that attributable to the 25-year, 

24-hour rainfall event, when such event occurs.