[Code of Federal Regulations]
[Title 40, Volume 29]
[Revised as of July 1, 2007]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR440.13]

[Page 411]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 440_ORE MINING AND DRESSING POINT SOURCE CATEGORY
--Table of Contents
 
                     Subpart A_Iron Ore Subcategory
 
Sec. 440.13  Effluent limitations representing the degree of effluent reduction 
attainable by the application of the best available technology economically 
          achievable (BAT).

    Except as provided in subpart L of this part and 40 CFR 125.30 
through 125.32, any existing point source subject to this subpart must 
achieve the following effluent limitations representing the degree of 
effluent reduction attainable by the application of the best available 
technology economically achievable (BAT):
    (a) The concentration of pollutants discharged in mine drainage from 
mines operated to obtain iron ore shall not exceed:

------------------------------------------------------------------------
                                                  Effluent limitations
                                               -------------------------
                                                              Average of
                                                                daily
            Effluent characteristic             Maximum for   values for
                                                 any 1 day        30
                                                             consecutive
                                                                 days
------------------------------------------------------------------------
                                                  Milligrams per liter
                                               -------------------------
Fe (dissolved)................................          2.0          1.0
------------------------------------------------------------------------

    (b) Except as provided in paragraph (c) of this section the 
concentration of pollutants discharged from mills that employ physical 
(magnetic and nonmagnetic) and/or chemical methods to beneficiate iron 
ore shall not exceed:

------------------------------------------------------------------------
                                                  Effluent limitations
                                               -------------------------
                                                              Average of
                                                                daily
            Effluent characteristic             Maximum for   values for
                                                 any 1 day        30
                                                             consecutive
                                                                 days
------------------------------------------------------------------------
                                                  Milligrams per liter
                                               -------------------------
Fe (dissolved)................................          2.0          1.0
------------------------------------------------------------------------

    (c)(1) Except as provided in paragraph (c) of this section, there 
shall be no discharge of process wastewater to navigable waters from 
mills that employ magnetic and physical methods to beneficiate iron ore 
in the Mesabi Range. The Agency recognizes that the elimination of the 
discharge of pollutants to navigable waters may result in an increase in 
discharges of some pollutants to other media. The Agency has considered 
these impacts and has addressed them in the preamble published on 
December 3, 1982.
    (2) In the event that the annual precipitation falling on the 
treatment facility and the drainage area contributing surface runoff to 
the treatment facility exceeds the annual evaporation, a volume of water 
equal to the difference between annual precipitation falling on the 
treatment facility and the drainage area contributing surface runoff to 
the treatment facility and annual evaporation may be discharged subject 
to the limitations set forth in paragraph (a) of this section.

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