CFR > Title 40 > Chapter I > Subchapter N > Part 454 > Subpart B CFR > Title 40 > Chapter I > Subchapter N > Part 454 > Subpart B – Gum Rosin and Turpentine Subcategory Current as of: 2024 | Check for updates | Other versions § 454.20 Applicability; description of the manufacture of gum rosin and turpentine subcategory § 454.21 Specialized definitions § 454.22 Effluent limitations and guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available