(a) This part applies to any pulp, paper, or paperboard mill that discharges or may discharge process wastewater pollutants to the waters of the United States, or that introduces or may introduce process wastewater pollutants into a publicly owned treatment works.
(b) The following table presents the subcategorization scheme codified in this part, with references to former subpart designations contained in the 1997 edition of 40 CFR parts 425 through 699:
Subcategorization Scheme With References to Former Subparts Contained in the July 1, 1997 Edition of 40 CFR Parts 425 Through 699
| Final codified subpart | Final subcategorization scheme | Types of products covered in the subpart |
|---|---|---|
| A | Dissolving Kraft | Dissolving pulp at kraft mills (Fa) |
| B | Bleached Papergrade Kraft and Soda | Market pulp at bleached kraft mills (Ga); paperboard, coarse paper, and tissue paper at bleached kraft mills (Ha); pulp and fine papers at bleached kraft mills (Ia); and pulp and paper at soda mills (Pa). |
| C | Unbleached Kraft | Pulp and paper at unbleached kraft mills including linerboard or bag paper and other mixed products (Aa); pulp and paper using the unbleached kraft-neutral sulfite semi-chemical (cross recovery) process (Da); and pulp and paper at combined unbleached kraft and semi-chemical mills, wherein the spent semi-chemical cooking liquor is burned within the unbleached kraft chemical recovery system (Va). |
| D | Dissolving Sulfite | Pulp at dissolving sulfite mills for the following grades: nitration, viscose, cellophane, and acetate (Ka). |
| E | Papergrade Sulfite - Calcium-, Magnesium-, or Sodium-based pulps - Ammonium-based pulps. - Specialty grade pulps. |
Pulp and paper at papergrade sulfite mills where blow pit pulp washing techniques are used (Ja) and pulp and paper at papergrade sulfite mills where vacuum or pressure drums are used to wash pulp (Ua). |
| F | Semi-Chemical | Pulp and paper at semi-chemical mills using an ammonia base or a sodium base (Ba). |
| G | Mechanical Pulp | Pulp and paper at groundwood chemi-mechanical mills (La); pulp and paper at groundwood mills through the application of the thermo-mechanical process (Ma); pulp and coarse paper, molded pulp products, and newsprint at groundwood mills (Na); and pulp and fine paper at groundwood mills (Oa). |
| H | Non-Wood Chemical Pulp | Pulp and paper at non-wood chemical pulp mills. |
| I | Secondary Fiber Deink | Pulp and paper at deink mills including fine papers, tissue papers, or newsprint (Qa). |
| J | Secondary Fiber Non-Deink | Paperboard from wastepaper from noncorrugating medium furnish or from corrugating medium furnish (Ea); tissue paper from wastepaper without deinking at secondary fiber mills (Ta); molded products from wastepaper without deinking (Wa); and builders' paper and roofing felt from wastepaper (40 CFR part 431, subpart Aa). |
| K | Fine and Lightweight Papers from Purchased Pulp | Fine Papers at nonintegrated mills using wood fiber furnish or cotton fiber furnish (Ra); and lightweight papers at nonintegrated mills or lightweight electrical papers at nonintegrated mills (Xa). |
| L | Tissue, Filter, Non-woven, and Paperboard from Purchased Pulp | Tissue papers at nonintegrated mills (Sa); filter and non-woven papers at nonintegrated mills (Ya); and paperboard at nonintegrated mills (Za). |