40 CFR § 467.25 - Pretreatment standards for existing sources.
---identifier: "/us/cfr/t40/s467.25"source: "ecfr"legal_status: "authoritative_unofficial"title: "40 CFR § 467.25 - Pretreatment standards for existing sources."title_number: 40title_name: "Protection of Environment"section_number: "467.25"section_name: "Pretreatment standards for existing sources."chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"subchapter_number: "N"subchapter_name: "EFFLUENT GUIDELINES AND STANDARDS"part_number: "467"part_name: "ALUMINUM FORMING 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), (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."regulatory_source: "48 FR 49149, Oct. 24, 1983, unless otherwise noted."cfr_part: "467"---
Identifier
/us/cfr/t40/s467.25
Currency
2026-04-05
Positive Law
No
Updated
2026-04-05
Chapter
Environmental Protection Agency
Authority
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 ... 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.
# 467.25 Pretreatment standards for existing sources.Except as provided in 40 CFR 403.7 and 403.13, any existing source subject to this subpart which introduces pollutants into a publicly owned treatment works must comply with 40 CFR part 403 and achieve the following pretreatment standards for existing sources. The mass of wastewater pollutants in aluminum forming process wastewater introduced into a POTW shall not exceed the following values:****Subpart B****Core| | | || --- | --- | --- || | mg/off-kg (lb/million off-lbs) of aluminum rolled with emulsions | || Chromium | 0.057 | 0.024 || Cyanide | 0.038 | 0.016 || Zinc | 0.190 | 0.079 || TTO | 0.090 | || Oil and grease (alternate monitoring parameter) | 6.8 | 3.4 |****Subpart B****Direct Chill Casting Contact Cooling Water| | | || --- | --- | --- || | mg/off-kg (lb/million off-lbs) of aluminum cast by semi-continuous methods | || Chromium | 0.59 | 0.24 || Cyanide | 0.39 | 0.16 || Zinc | 1.94 | 0.81 || TTO | 0.92 | || Oil and grease (alternate monitoring parameter) | 69 | 35 |****Subpart B****Solution Heat Treatment Contact Cooling Water| | | || --- | --- | --- || | mg/off-kg (lb/million off-lbs) of aluminum quenched | || Chromium | 0.90 | 0.37 || Cyanide | 0.59 | 0.25 || Zinc | 2.98 | 1.25 || TTO | 1.41 | || Oil and grease (alternate monitoring parameter) | 110 | 53 |****Subpart B****Cleaning or Etching Bath| | | || --- | --- | --- || | mg/off-kg (lb/million off-lbs) of aluminum cleaned or etched | || Chromium | 0.079 | 0.032 || Cyanide | 0.052 | 0.022 || Zinc | 0.262 | 0.109 || TTO | 0.124 | || Oil and grease (alternate monitoring parameter) | 9.3 | 4.7 |****Subpart B****Cleaning or Etching Rinse| | | || --- | --- | --- || | mg/off-kg (lb/million off-lbs) of aluminum cleaned or etched | || Chromium | 0.61 | 0.25 || Cyanide | 0.41 | 0.17 || Zinc | 2.03 | 0.85 || TTO | 0.96 | || Oil and grease (alternate monitoring parameter) | 73 | 36 |****Subpart B****Cleaning or Etching Scrubber Liquor| | | || --- | --- | --- || | mg/off-kg (lb/million off-lbs) of aluminum cleaned or etched | || Chromium | 0.85 | 0.35 || Cyanide | 0.56 | 0.23 || Zinc | 2.83 | 1.18 || TTO | 1.34 | || Oil and grease (alternate monitoring parameter) | 100 | 50 |[48 FR 49149, Oct. 24, 1983; 49 FR 11631, 11632, 11633, Mar. 27, 1984, as amended at 53 FR 52369, 52370, Dec. 27, 1988]