[Code of Federal Regulations]
[Title 40, Volume 27]
[Revised as ofJuly 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR436.72]

[Page 355]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 436--MINERAL MINING AND PROCESSING POINT SOURCE CATEGORY--Table of Contents
 
            Subpart G--Asbestos and Wollastonite Subcategory
 
Sec. 436.72  Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control 
          technology currently available.

    Except as provided in Secs. 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 practicable control technology 
currently available (BPT):
    (a) Subject to the provisions of the following paragraphs of this 
section, there shall be no discharge of process generated waste water 
pollutants into navigable waters.
    (b) Only that volume of water resulting from precipitation that 
exceeds the maximum safe surge capacity of a process waste water 
impoundment may be discharged from that impoundment. The height 
difference between the maximum safe surge capacity level and the normal 
operating level must be greater than the inches of rain representing the 
10-year, 24-hour rainfall event as established by the National Climatic 
Center, National Oceanic and Atmospheric Administration for the locality 
in which such impoundment is located.

[40 FR 48657, Oct. 16, 1975, as amended at 60 FR 33967, June 29, 1995]

Subpart H--Lightweight Aggregates Subcategory [Reserved]

Subpart I--Mica and Sericite Subcategory [Reserved]