[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: 40CFR422.50]

[Page 649]
 
                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. 422.50  Applicability; description of the defluorinated phosphoric acid subcategory.

    Source: 41 FR 25977, June 23, 1976, unless otherwise noted.


    The provisions of this subpart are applicable to discharges 
resulting from the defluorination of phosphoric acid. Wet process 
phosphoric acid is dehydrated by application of heat and other 
processing acids such as vacuum and air stripping. The acid is 
concentrated up to 70-73% P2 O5 in the 
defluorination process.