CFR > Title 40 > Chapter I > Subchapter N > Part 415 > Subpart AD CFR > Title 40 > Chapter I > Subchapter N > Part 415 > Subpart AD – Calcium Carbonate Production Subcategory Current as of: 2024 | Check for updates | Other versions § 415.300 Applicability; description of the calcium carbonate production subcategory § 415.301 Specialized definitions § 415.302 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT)