The provisions of this subpart apply to discharges of process wastewaters resulting from the chemical milling or etching of ferrous or nonferrous materials.
authority: Secs. 301, 304(g), 307, 308, 309, 402, 405, 501(a), Clean Water Act, as amended, (
33 U.S.C. 1311,
1314,
1317,
1318,
1319,
1322,
1325
source: 46 FR 9467, Jan. 28, 1981, unless otherwise noted.
cite as: 40 CFR 413.60