CFR > Title 40 > Chapter I > Subchapter N > Part 436 > Subpart S CFR > Title 40 > Chapter I > Subchapter N > Part 436 > Subpart S – Frasch Sulfur Subcategory Current as of: 2024 | Check for updates | Other versions § 436.190 Applicability; description of the Frasch sulfur subcategory § 436.191 Specialized definitions § 436.192 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available