40 CFR § 411.20 - Applicability; description of the leaching subcategory.
---identifier: "/us/cfr/t40/s411.20"source: "ecfr"legal_status: "authoritative_unofficial"title: "40 CFR § 411.20 - Applicability; description of the leaching subcategory."title_number: 40title_name: "Protection of Environment"section_number: "411.20"section_name: "Applicability; description of the leaching subcategory."chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"subchapter_number: "N"subchapter_name: "EFFLUENT GUIDELINES AND STANDARDS"part_number: "411"part_name: "CEMENT MANUFACTURING POINT SOURCE CATEGORY"positive_law: falsecurrency: "2026-04-05"last_updated: "2026-04-05"format_version: "1.1.0"generator: "[email protected]"authority: "Secs. 301, 304 (b) and (c), 306 (b) and (c), and 307(c) of the Federal Water Pollution Control Act, as amended; 33 U.S.C. 1251, 1311, 1314 (b) and (c), 1316 (b) and (c), and 1317(c); 86 Stat. 816 Pub. L., 92-500; 91 Stat. 1567, Pub. L. 95-217."regulatory_source: "39 FR 6591, Feb. 20, 1974, unless otherwise noted."cfr_part: "411"---
Identifier
/us/cfr/t40/s411.20
Currency
2026-04-05
Positive Law
No
Updated
2026-04-05
Chapter
Environmental Protection Agency
Authority
Secs. 301, 304 (b) and (c), 306 (b) and (c), and 307(c) of the Federal Water Pollution Control Act, as amended; 33 U.S.C. 1251, 1311, 1314 (b) and (c), 1316 (b) and (c), and 1317(c); 86 Stat. 816 Pub... Secs. 301, 304 (b) and (c), 306 (b) and (c), and 307(c) of the Federal Water Pollution Control Act, as amended; 33 U.S.C. 1251, 1311, 1314 (b) and (c), 1316 (b) and (c), and 1317(c); 86 Stat. 816 Pub. L., 92-500; 91 Stat. 1567, Pub. L. 95-217.
# 411.20 Applicability; description of the leaching subcategory.The provisions of this subpart are applicable to discharges resulting from the process in which several mineral ingredients (limestone or other natural sources of calcium carbonate, silica, alumina, and iron together with gypsum) are used in the manufacturing of cement and in which kiln dust is contacted with water as an integral part of the process or water is used in wet scrubbers to control kiln stack emissions.