Regulations last checked for updates: Nov 23, 2024
Title 40 - Protection of Environment last revised: Nov 21, 2024
§ 421.230 - Applicability: Description of the primary nickel and cobalt subcategory.
The provisions of this subpart are applicable to discharges resulting from the production of nickel or cobalt by primary nickel and cobalt facilities processing ore concentrate raw materials.
§ 421.231 - Specialized definitions.
For the purpose of this subpart the general definitions, abbreviations, and methods of analysis set forth in 40 CFR part 401 shall apply to this subpart.
§ 421.232 - 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) Raw Material dust control.
BPT Limitations for the Primary Nickel and Cobalt Subcategory
| Pollutant or pollutant property
| Maximum for any 1 day
| Maximum for monthly average
|
|---|
| mg/kg (pounds per million pounds) of copper, nickel, and cobalt in the crushed raw material
|
| Copper | 0.146 | 0.077
|
| Nickel | 0.148 | 0.098
|
| Ammonia (as N) | 10.260 | 4.512
|
| Cobalt | 0.016 | 0.007
|
| Total suspended solids | 3.157 | 1.502
|
| pH | (
1) | (
1)
|
(b) Nickel wash water.
BPT Limitations for the Primary Nickel and Cobalt Subcategory
| Pollutant or pollutant property
| Maximum for any 1 day
| Maximum for monthly average
|
|---|
| mg/kg (pounds per million pounds) of nickel powder washed
|
| Copper | 0.064 | 0.034
|
| Nickel | 0.065 | 0.043
|
| Ammonia (as N) | 4.515 | 1.985
|
| Cobalt | 0.007 | 0.003
|
| Total suspended solids | 1.389 | 0.660
|
| pH | (
1) | (
1)
|
(c) Nickel reduction decant.
BPT Limitations for the Primary Nickel and Cobalt Subcategory
| Pollutant or pollutant property
| Maximum for any 1 day
| Maximum for monthly average
|
|---|
| mg/kg (pounds per million pounds) of nickel produced
|
| Copper | 24.120 | 12.700
|
| Nickel | 24.370 | 16.120
|
| Ammonia (as N) | 1,692.000 | 743.900
|
| Cobalt | 2.666 | 1.143
|
| Total suspended solids | 520.500 | 247.600
|
| pH | (
1) | (
1)
|
(d) Cobalt reduction decant.
BPT Limitations for the Primary Nickel and Cobalt Subcategory
| Pollutant or pollutant property
| Maximum for any 1 day
| Maximum for monthly average
|
|---|
| mg/kg (pounds per million pounds) of cobalt produced
|
| Copper | 40.660 | 21.400
|
| Nickel | 41.080 | 27.180
|
| Ammonia (as N) | 2,852.000 | 1,254.000
|
| Cobalt | 4.494 | 1.926
|
| Total suspended solids | 877.300 | 417.300
|
| pH | (
1) | (
1)
|
§ 421.233 - Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
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 available technology economically achievable:
(a) Raw material dust control.
BAT Limitations for the Primary Nickel and Cobalt Subcategory
| Pollutant or pollutant property
| Maximum for any 1 day
| Maximum for monthly average
|
|---|
| mg/kg (pounds per million pounds) of copper, nickel, and cobalt in the crushed raw material
|
| Copper | 0.099 | 0.047
|
| Nickel | 0.042 | 0.028
|
| Ammonia (as N) | 10.260 | 4.512
|
| Cobalt | 0.011 | 0.005 |
(b) Nickel wash water.
BAT Limitations for the Primary Nickel and Cobalt Subcategory
| Pollutant or pollutant property
| Maximum for any 1 day
| Maximum for monthly average
|
|---|
| mg/kg (pounds per million pounds) of nickel powder washed
|
| Copper | 0.043 | 0.021
|
| Nickel | 0.019 | 0.013
|
| Ammonia (as N) | 4.515 | 1.985
|
| Cobalt | 0.005 | 0.002 |
(c) Nickel reduction decant.
BAT Limitations for the Primary Nickel and Cobalt Subcategory
| Pollutant or pollutant property
| Maximum for any 1 day
| Maximum for monthly average
|
|---|
| mg/kg (pounds per million pounds) of nickel produced
|
| Copper | 16.250 | 7.744
|
| Nickel | 6.982 | 4.697
|
| Ammonia (as N) | 1,692.000 | 743.900
|
| Cobalt | 1.777 | 0.889 |
(d) Cobalt reduction decant.
BAT Limitations for the Primary Nickel and Cobalt Subcategory
| Pollutant or pollutant property
| Maximum for any 1 day
| Maximum for monthly average
|
|---|
| mg/kg (pounds per million pounds) of cobalt produced
|
| Copper | 27.390 | 13.050
|
| Nickel | 11.770 | 7.917
|
| Ammonia (as N) | 2,852.000 | 1,254.000
|
| Cobalt | 2.996 | 1.498 |
§ 421.234 - Standards of performance for new sources.
Any new source subject to this subpart shall achieve the following new source performance standards:
(a) Raw Material Dust Control.
NSPS for the Primary Nickel and Cobalt Subcategory
| Pollutant or pollutant property
| Maximum for any 1 day
| Maximum for monthly average
|
|---|
| mg/kg (pounds per million pounds) of copper, nickel, and cobalt in the crushed raw material
|
| Copper | 0.099 | 0.047
|
| Nickel | 0.042 | 0.028
|
| Ammonia (as N) | 10.260 | 4.512
|
| Cobalt | 0.011 | 0.005
|
| Total suspended solids | 1.155 | 0.924
|
| pH |
1 |
1
|
(b) Nickel wash water.
NSPS for the Primary Nickel and Cobalt Subcategory
| Pollutant or pollutant property
| Maximum for any 1 day
| Maximum for monthly average
|
|---|
| mg/kg (pounds per million pounds) of nickel powder washed
|
| Copper | 0.043 | 0.021
|
| Nickel | 0.019 | 0.013
|
| Ammonia (as N) | 4.515 | 1.985
|
| Cobalt | 0.005 | 0.002
|
| Total suspended solids | 0.508 | 0.406
|
| pH |
1 |
1
|
(c) Nickel reduction decant.
NSPS for the Primary Nickel and Cobalt Subcategory
| Pollutant or pollutant property
| Maximum for any 1 day
| Maximum for monthly average
|
|---|
| mg/kg (pounds per million pounds) of nickel produced
|
| Copper | 16.250 | 7.744
|
| Nickel | 6.982 | 4.697
|
| Ammonia (as N) | 1,692.000 | 743.900
|
| Cobalt | 1.777 | 0.889
|
| Total suspended solids | 190.400 | 152.300
|
| pH |
1 |
1
|
(d) Cobalt reduction decant.
NSPS for the Primary Nickel and Cobalt Subcategory
| Pollutant or pollutant property
| Maximum for any 1 day
| Maximum for monthly average
|
|---|
| mg/kg (pounds per million pounds) of cobalt produced
|
| Copper | 27.390 | 13.050
|
| Nickel | 11.770 | 7.917
|
| Ammonia (as N) | 2,852.000 | 1,254.000
|
| Cobalt | 2.996 | 1.498
|
| Total suspended solids | 321.000 | 256.800
|
| pH |
1 |
1
|
§ 421.235 - [Reserved]
§ 421.236 - Pretreatment standards for new sources.
Except as provided in 40 CFR 403.7, any new source subject to this subpart which introduces pollutants into a publicly owned treatment works must comply with a 40 CFR part 403 and achieve the following pretreatment standards for new sources. The mass of wastewater pollutants in primary nickel and cobalt process wastewater introduced into a POTW shall not exceed the following values:
(a) Raw material dust control.
PSNS for the Primary Nickel and Cobalt Subcategory
| Pollutant or pollutant property
| Maximum for any 1 day
| Maximum for monthly average
|
|---|
| mg/kg (pounds per million pounds) of copper, nickel, and cobalt in the crushed raw material
|
| Copper | 0.099 | 0.047
|
| Nickel | 0.042 | 0.028
|
| Ammonia (as N) | 10.260 | 4.512
|
| Cobalt | 0.011 | 0.005 |
(b) Nickel wash water.
PSNS for the Primary Nickel and Cobalt Subcategory
| Pollutant or pollutant property
| Maximum for any 1 day
| Maximum for monthly average
|
|---|
| mg/kg (pounds per million pounds) of nickel powder washed
|
| Copper | 0.043 | 0.021
|
| Nickel | 0.019 | 0.013
|
| Ammonia (as N) | 4.515 | 1.985
|
| Cobalt | 0.005 | 0.002 |
(c) Nickel reduction decant.
PSNS for the Primary Nickel and Cobalt Subcategory
| Pollutant or pollutant property
| Maximum for any 1 day
| Maximum for monthly average
|
|---|
| mg/kg (pounds per million pounds) nickel produced
|
| Copper | 16.250 | 7.744
|
| Nickel | 6.982 | 4.697
|
| Ammonia (as N) | 1,692.000 | 743.900
|
| Cobalt | 1.777 | 0.889 |
(d) Cobalt reduction decant.
PSNS for the Primary Nickel and Cobalt Subcategory
| Pollutant or pollutant property
| Maximum for any 1 day
| Maximum for monthly average
|
|---|
| mg/kg (pounds per million pounds) of cobalt produced
|
| Copper | 27.390 | 13.050
|
| Nickel | 11.770 | 7.917
|
| Ammonia (as N) | 2,852.000 | 1,254.000
|
| Cobalt | 2.996 | 1.498 |
§ 421.237 - [Reserved]
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,
c,
e,
and, 1316 (b) and
c, 1317 (b) and
c,
1318; 86 Stat. 816, Pub. L. 92-500; 91 Stat. 1567, Pub. L. 95-217; 101 Stat. 7, Pub. L. 100-4
source: 49 FR 8790, Mar. 8, 1984, unless otherwise noted.
cite as: 40 CFR 421.234