40 CFR § 421.184 - Standards of performance for new sources.
---
identifier: "/us/cfr/t40/s421.184"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 421.184 - Standards of performance for new sources."
title_number: 40
title_name: "Protection of Environment"
section_number: "421.184"
section_name: "Standards of performance for new sources."
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"
---
# 421.184 Standards of performance for new sources.
Any new source subject to this subpart shall achieve the following new source performance standards:
(a) Still liquor.
NSPS 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 | 131.70 | 58.59 |
| Lead | 26.46 | 12.60 |
| Zinc | 91.98 | 38.43 |
| Fluoride | 2,205.00 | 1,254.00 |
| Total suspended solids | 2,583.00 | 1,229.00 |
| pH | () | () |
| Within the range of 7.5 to 10.0 at all times. | | |
(b) Chlorinator wet air pollution control.
NSPS 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.
NSPS for the Primary and Secondary Germanium and Gallium Subcategory
| Pollutant or pollutant property | Maximum for 1 one 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.
NSPS 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 | 325.50 | 144.80 |
| Lead | 65.40 | 31.14 |
| Zinc | 227.40 | 94.99 |
| Fluoride | 5,450.00 | 3,099.00 |
| Total suspended solids | 6,385.00 | 3,037.00 |
| pH | () | () |
| Within the range of 7.5 to 10.0 at all times. | | |
(e) Gallium hydrolysis filtrate.
NSPS 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.
NSPS 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. | | |