GroundRules
40 CFR 421.92: Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
Where this section sits in the code
- Title 40—Protection of Environment
- CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY
- SUBCHAPTER N—EFFLUENT GUIDELINES AND STANDARDS
- PART 421—NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORY
- Subpart I—Metallurgical Acid Plants Subcategory
Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this subpart must achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT):
Subpart I—Metallurgical Acid Plant
Pollutant or pollutant property BPT effluent limitations
Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds of 100% sulfuric acid capacity
Cadmium 0.180 0.090
Copper 5.000 2.000
Lead 1.800 0.790
Zinc 3.600 0.900
Fluoride 1 212.800 121.000
Molybdenum 1 40.180 20.790
Total suspended solids 304.000 152.000
pH 2 2
1 For Molybdenum Acid Plants Only.
2 Within the range of 6.0 to 9.0 at all times.
Collected 2026-08-27T02:26:04Z. Source file · JSON