40 CFR 421.40
§ 421.40 Applicability: Description of the primary copper smelting subcategory.
United States · 40 CFR — Protection of Environment · Status: effective
Cite this
- Citation
- 40 CFR 421.40, § 421.40 Applicability: Description of the primary copper smelting subcategory, United States, version 1 as recorded 2026-07-09, yourstate.us, https://yourstate.us/provision/188917
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Full text
The provisions of this subpart apply to process wastewater discharges resulting from the primary smelting of copper from ore or ore concentrates. Primary copper smelting includes, but is not limited to, roasting, converting, leaching if preceded by a pyrometallurgical step, slag granulation and dumping, fire refining, and the casting of products from these operations.
Legislative history
This is a federal regulation, adopted through agency rulemaking under the Administrative Procedure Act — not enacted by a recorded vote of Congress.