[Code of Federal Regulations]
[Title 40, Volume 26]
[Revised as of July 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR422.57]

[Page 652]
 
                TITLE 40-PROTECTION OF ENVIRONMENT
 
      CHAPTER I-ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 422-PHOSPHATE MANUFACTURING POINT SOURCE CATEGORY--Table of Contents
 
       Subpart E-Defluorinated Phosphoric Acid Subcategory
 
Sec. 422.57  Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best conventional pollutant 
          control technology.

    The following limitations establish the quantity or quality of 
pollutants or pollutant properties, which may be discharged by a point 
source subject to the provisions of this subpart after application of 
the best conventional pollutant control technology:
    (a) Subject to the provisions of paragraphs (b), (c) and (d) of this 
section, the following limitations establish the quantity or quality of 
pollutants or pollutant properties, controlled by this section, which 
may be discharged by a point source subject to the provisions of this 
subpart after application of the best conventional pollutant control 
technology: There shall be no discharge of process waste water 
pollutants to navigable waters.
    (b) Process waste water pollutants from a cooling water 
recirculation system designed, constructed and operated to maintain a 
surge capacity equal to the runoff from the 25-year, 24-hour rainfall 
event may be discharged, after treatment to the standards set forth in 
paragraph (c) of this section, whenever chronic or catastrophic 
precipitation events cause the water level in the pond to rise into the 
surge capacity. Process waste water must be treated and discharged 
whenever the water level equals or exceeds the mid-point of the surge 
capacity.
    (c) The concentration of pollutants discharged in process waste 
water pursuant to the limitations of paragraph (b) of this section shall 
not exceed the values listed in the following table:

                         [Milligrams per liter]
------------------------------------------------------------------------
                                             Effluent limitations
                                     -----------------------------------
                                                     Average of daily
       Effluent characteristic          Maximum        values for 30
                                       for any 1  consecutive days shall
                                          day       not exceed-
                                                         
------------------------------------------------------------------------
TSS.................................         150                   50
pH..................................       (\1\)                (\1\)
------------------------------------------------------------------------
\1\ Within the range 6.0 to 9.5.


The total suspended solid limitation set forth in this paragraph shall 
be waived for process waste water from a calcium sulfate storage pile 
runoff facility, operated separately or in combination with a water 
recirculation system, which is chemically treated and then clarified or 
settled to meet the other pollutant limitations set forth in this 
paragraph.
    (d) The concentration of pollutants discharged in contaminated non-
process waste water shall not exceed the values listed in the following 
table:

                         [Milligrams per liter]
------------------------------------------------------------------------
                                             Effluent limitations
                                     -----------------------------------
                                                     Average of daily
       Effluent characteristic          Maximum        values for 30
                                       for any 1  consecutive days shall
                                          day       not exceed-
                                                         
------------------------------------------------------------------------
pH..................................       (\1\)                (\1\)
------------------------------------------------------------------------
\1\ Within the range 6.0 to 9.5.


[44 FR 50743, Aug. 27, 1979]