CFR > Title 40 > Chapter I > Subchapter C > Part 63 > Subpart QQ CFR > Title 40 > Chapter I > Subchapter C > Part 63 > Subpart QQ – National Emission Standards for Surface Impoundments Current as of: 2024 | Check for updates | Other versions § 63.940 Applicability § 63.941 Definitions § 63.942 Standards–Surface impoundment floating membrane cover § 63.943 Standards–Surface impoundment vented to control device § 63.945 Test methods and procedures § 63.946 Inspection and monitoring requirements § 63.947 Recordkeeping requirements § 63.948 Reporting requirements § 63.949 Implementation and enforcement