40 CFR § 421.182 - Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
---
identifier: "/us/cfr/t40/s421.182"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 421.182 - Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available."
title_number: 40
title_name: "Protection of Environment"
section_number: "421.182"
section_name: "Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "N"
subchapter_name: "EFFLUENT GUIDELINES AND STANDARDS"
part_number: "421"
part_name: "NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORY"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
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: "49 FR 8790, Mar. 8, 1984, unless otherwise noted."
cfr_part: "421"
---
# 421.182 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this subpart shall achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable technology currently available:
(a) Still liquor.
BPT Limitations for the Primary and Secondary Germanium and Gallium Subcategory
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
| --- | --- | --- |
| | mg/kg (pounds per million pounds) of germanium chlorinated | |
| Arsenic | 131.700 | 58.590 |
| Lead | 26.460 | 12.600 |
| Zinc | 91.980 | 38.430 |
| Fluoride | 2,205.000 | 1,254.000 |
| Total suspended solids | 2,583.000 | 1,229.000 |
| pH | () | () |
| Within the range of 7.5 to 10.0 at all times. | | |
(b) Chlorinator wet air pollution control.
BPT Limitations for the Primary and Secondary Germanium and Gallium Subcategory
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
| --- | --- | --- |
| | mg/kg (pounds per million pounds) of germanium chlorinated | |
| Arsenic | 27.530 | 12.250 |
| Lead | 5.531 | 2.634 |
| Zinc | 19.230 | 8.034 |
| Fluoride | 461.000 | 262.100 |
| Total suspended solids | 540.000 | 256.800 |
| pH | () | () |
| Within the range of 7.5 to 10.0 at all times. | | |
(c) Germanium hydrolysis filtrate.
BPT Limitations for the Primary and Secondary Germanium and Gallium Subcategory
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
| --- | --- | --- |
| | mg/kg (pounds per million pounds) of germanium hydrolyzed | |
| Arsenic | 39.440 | 17.550 |
| Lead | 7.925 | 3.774 |
| Zinc | 27.550 | 11.510 |
| Fluoride | 660.500 | 375.500 |
| Total suspended solids | 773.700 | 368.000 |
| pH | () | () |
| Within the range of 7.5 to 10.0 at all times. | | |
(d) Acid wash and rinse water.
BPT Limitations for the Primary and Secondary Germanium and Gallium Subcategory
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
| --- | --- | --- |
| | mg/kg (pounds per million pounds) of germanium washed | |
| Arsenic | 325.500 | 144.800 |
| Lead | 65.400 | 31.140 |
| Zinc | 227.400 | 94.990 |
| Fluoride | 5,450.000 | 3,099.000 |
| Total suspended solids | 6,385.000 | 3,037.000 |
| pH | () | () |
| Within the range of 7.5 to 10.0 at all times. | | |
(e) Gallium hydrolysis filtrate.
BPT Limitations for the Primary and Secondary Germanium and Gallium Subcategory
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
| --- | --- | --- |
| | mg/kg (pounds per million pounds) of gallium hydrolyzed | |
| Arsenic | 70.450 | 31.350 |
| Lead | 14.160 | 6.742 |
| Zinc | 49.220 | 20.560 |
| Fluoride | 1,180.000 | 670.800 |
| Total suspended solids | 1,382.000 | 657.300 |
| pH | () | ) |
| Within the range of 7.5 to 10.0 at all times. | | |
(f) Solvent extraction raffinate.
BPT Limitations for the Primary and Secondary Germanium and Gallium Subcategory
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
| --- | --- | --- |
| | mg/kg (pounds per million pounds) of gallium produced by solvent extraction | |
| Arsenic | 39.330 | 17.500 |
| Lead | 7.904 | 3.764 |
| Zinc | 27.480 | 11.480 |
| Fluoride | 658.700 | 374.500 |
| Total suspended solids | 771.600 | 367.000 |
| pH | () | () |
| Within the range of 7.5 to 10.0 at all times. | | |