CFR > Title 40 - Protection of Environment > CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY > SUBCHAPTER N—EFFLUENT GUIDELINES AND STANDARDS (Parts 400–471) > PART 430—THE PULP, PAPER, AND PAPERBOARD POINT SOURCE CATEGORY > SUBPART B—Bleached Papergrade Kraft and Soda Subcategory (§430.20 to §430.28) > 430.28—Best management practices (BMPs).