Title 40

PART 421 SUBPART B

Secs. 301, 304 (b), (c), (e), and (g), 306 (b) and (c), 307 (b) and (c), 308 and 501 of the Clean Water Act (the Federal Water Pollution Control Act Amendments of 1972, as amended by the Clean Water Act of 1977) and the Water Quality Act of 1987 (the “Act”); 33 U.S.C. 1311, 1314 (b), (c), (e), and (g), 1316 (b) and (c), 1317 (b) and (c), 1318 and 1361; 86 Stat. 816, Pub. L. 92-500; 91 Stat. 1567, Pub. L. 95-217; 101 Stat. 7, Pub. L. 100-4.
49 FR 8790, Mar. 8, 1984, unless otherwise noted.

40:31.0.1.1.21.2.5.1	SECTION 421.20	421.20 Applicability: description of the primary aluminum smelting subcategory.
40:31.0.1.1.21.2.5.2	SECTION 421.21	421.21 Specialized definitions.
40:31.0.1.1.21.2.5.3	SECTION 421.22	421.22 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
40:31.0.1.1.21.2.5.4	SECTION 421.23	421.23 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
40:31.0.1.1.21.2.5.5	SECTION 421.24	421.24 Standards of performance for new sources.
40:31.0.1.1.21.2.5.6	SECTION 421.25	421.25 [Reserved]
40:31.0.1.1.21.2.5.7	SECTION 421.26	421.26 Pretreatment standards for new sources.
40:31.0.1.1.21.2.5.8	SECTION 421.27	421.27 [Reserved]