CFR > Title 40 > Chapter I > Subchapter N > Part 436 > Subpart V CFR > Title 40 > Chapter I > Subchapter N > Part 436 > Subpart V – Bentonite Subcategory Current as of: 2024 | Check for updates | Other versions § 436.220 Applicability; description of the bentonite subcategory § 436.221 Specialized definitions § 436.222 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available