[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: 40CFR421.65]



[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.  421.65  Pretreatment standards for existing sources.



    Except as provided in 40 CFR 403.7 and 403.13, any existing source 

subject to this subpart which introduces pollutants into a publicly 

owned treatment works must comply with 40 CFR part 403 and achieve the 

following pretreatment standards for existing sources. The mass of 

wastewater pollutants in secondary copper process wastewater introduced 

into a POTW shall not exceed the following values:

    (a) There shall be no discharge of process wastewater pollutants 

into a publicly owned treatment works subject to the provisions of 

paragraph (b) of this section.

    (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 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.



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