[Code of Federal Regulations]
[Title 40, Volume 27]
[Revised as ofJuly 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR430.51]

[Page 150]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 430--THE PULP, PAPER, AND PAPERBOARD POINT SOURCE CATEGORY--Table of Contents
 
                Subpart E--Papergrade Sulfite Subcategory
 
Sec. 430.51  Specialized definitions.

    (a) Except as provided in paragraphs (b) and (c) of this section, 
the general definitions, abbreviations, and methods of analysis set 
forth in 40 CFR part 401 and Sec. 430.01 of this part apply to this 
subpart.
    (b) Sulfite cooking liquor is defined as bisulfite cooking liquor 
when the pH of the liquor is between 3.0 and 6.0 and as acid sulfite 
cooking liquor when the pH is less than 3.0.
    (c) For this subpart, the segments for the papergrade sulfite 
subcategory are defined as follows:
    (1) The calcium-, magnesium-, or sodium-based sulfite pulp segment 
consists of papergrade sulfite mills where pulp and paper are produced 
using an acidic cooking liquor of calcium, magnesium, or sodium sulfite, 
unless those mills are specialty grade sulfite mills;
    (2) The ammonium-based sulfite pulp segment consists of papergrade 
sulfite mills where pulp and paper are produced using an acidic cooking 
liquor of ammonium sulfite, unless those mills are specialty grade 
sulfite mills;
    (3) The specialty grade sulfite pulp segment consists of those 
papergrade sulfite mills where a significant portion of production is 
characterized by pulp with a high percentage of alpha cellulose and high 
brightness sufficent to produce end products such as plastic molding 
compounds, saturating and laminating products, and photographic papers. 
The specialty grade segment also includes those mills where a major 
portion of production is 91 ISO brightness and above.