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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.
49 FR 8790, Mar. 8, 1984, unless otherwise noted.
50 FR 38345, Sept. 20, 1985, unless otherwise noted.
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Subscribe to: 40 CFR Part 421 Subpart N
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50 FR 38345, Sept. 20, 1985, unless otherwise noted.
The provisions of this subpart are applicable to discharges resulting from the production of antimony at primary antimony facilities.
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.
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 control technology currently available:
(a) Sodium Antimonate Autoclave Wastewater.
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of antimony contained in sodium antimonate product | ||
| Antimony | 44.840 | 20.000 |
| Arsenic | 32.650 | 14.530 |
| Mercury | 3.906 | 1.562 |
| Total suspended solids | 640.600 | 304.700 |
| pH | (1) | (1) |
| 1 Within the range of 7.5 to 10.0 at all times. | ||
(b) Fouled anolyte.
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of antimony metal produced by electrowinning | ||
| Antimony | 44.840 | 20.000 |
| Arsenic | 32.650 | 14.530 |
| Mercury | 3.906 | 1.562 |
| Total suspended solids | 640.600 | 304.700 |
| pH | (1) | (1) |
| 1 Within the range of 7.5 to 10.0 at all times. | ||
(c) Cathode Antimony Wash Water.
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of antimony metal produced by electrowinning | ||
| Antimony | 89.680 | 40.000 |
| Arsenic | 65.310 | 29.060 |
| Mercury | 7.812 | 3.125 |
| Total suspended solids | 1,281.000 | 609.300 |
| pH | (1) | (1) |
| 1 Within the range of 7.5 to 10.0 at all times. | ||
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) Sodium Antimonate Autoclave Wastewater.
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of antimony contained in sodium antimonate product | ||
| Antimony | 30.150 | 13.440 |
| Arsenic | 21.720 | 9.687 |
| Mercury | 2.344 | 0.937 |
(b) Fouled Anolyte.
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg pounds per million pounds of antimony metal produced by electrowinning | ||
| Antimony | 30.150 | 13.440 |
| Arsenic | 21.720 | 9.687 |
| Mercury | 2.344 | 0.937 |
(c) Cathode Antimony Wash Water
| Pollutant of pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of antimony metal produced by electrowinning | ||
| Antimony | 60.310 | 26.870 |
| Arsenic | 43.430 | 19.370 |
| Mercury | 4.687 | 1.875 |
Any new source subject to this subpart shall achieve the following new source performance standards:
(a) Sodium Antimonate Autoclave Wastewater.
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of antimony contained in sodium antimonate product | ||
| Antimony | 30.150 | 13.440 |
| Arsenic | 21.720 | 9.687 |
| Mercury | 2.344 | 0.937 |
| Total suspended solids | 234.400 | 187.500 |
| pH | (1) | (1) |
| 1 Within the range of 7.5 to 10.0 at all times. | ||
(b) Fouled Anolyte.
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of antimony metal produced by electrowinning | ||
| Antimony | 30.150 | 13.440 |
| Arsenic | 21.720 | 9.687 |
| Mercury | 2.344 | 0.937 |
| Total suspended solids | 234.400 | 187.500 |
| pH | (1) | (1) |
| 1 Within the range of 7.5 to 10.0 at all times. | ||
(c) Cathode Antimony Wash Water.
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of antimony metal produced by electrowinning | ||
| Antimony | 60.310 | 26.870 |
| Arsenic | 43.430 | 19.370 |
| Mercury | 4.687 | 1.875 |
| Total suspended solids | 468.700 | 375.000 |
| pH | (1) | (1) |
| 1 Within the range of 7.5 to 10.0 at all times. | ||
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 40 CFR part 403 and achieve the following pretreatment standards for new sources. The mass of wastewater pollutants in primary antimony process wastewater introduced into a POTW shall not exceed the following values:
(a) Sodium Antimonate Autoclave Wastewater.
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of antimony contained in sodium antimonate product | ||
| Antimony | 30.150 | 13.440 |
| Arsenic | 21.720 | 9.687 |
| Mercury | 2.344 | 0.937 |
(b) Fouled Anolyte.
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of antimony metal produced by electrowinning | ||
| Antimony | 30.150 | 13.440 |
| Arsenic | 21.720 | 9.687 |
| Mercury | 2.344 | 0.937 |
(c) Cathode Antimony Washwater.
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of antimony metal produced by electrowinning | ||
| Antimony | 60.310 | 26.870 |
| Arsenic | 43.430 | 19.370 |
| Mercury | 4.687 | 1.875 |