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| Subpart Q | Secondary Indium Subcategory | 421.190 – 421.197 | |||||||||||||||||||||
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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 38353, Sept. 20, 1985, unless otherwise noted.
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50 FR 38353, Sept. 20, 1985, unless otherwise noted.
The provisions of this subpart are applicable to discharges resulting from the production of indium at secondary indium facilities processing spent electrolyte solutions and scrap indium metal raw materials.
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.
Any new source subject to this subpart shall achieve the following new source performance standards:
(a) Displacement Supernatant.
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of indium metal produced | ||
| Cadmium | 2.105 | 0.929 |
| Lead | 2.600 | 1.238 |
| Zinc | 9.037 | 3.776 |
| Indium | 2.724 | 1.114 |
| Total suspended solids | 253.800 | 120.700 |
| pH | (1) | (1) |
| 1 Within the range of 7.5 to 10.0 at all times. | ||
(b) Spent Electrolyte.
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of cathode indium produced | ||
| Cadmium | 12.170 | 5.370 |
| Lead | 15.040 | 7.160 |
| Zinc | 52.270 | 21.840 |
| Indium | 15.750 | 6.444 |
| Total suspended solids | 1,468.000 | 698.100 |
| pH | (1) | (1) |
| 1 Within the range of 7.5 to 10.0 at all times. | ||
Except as provided in 40 CFR 403.7 and 403.13, any existing 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 existing sources. The mass of wastewater pollutants in secondary indium process wastewater introduced into a POTW must not exceed the following values:
(a) Displacement Supernatant.
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of indium metal produced | ||
| Cadmium | 2.105 | 0.929 |
| Lead | 2.600 | 1.238 |
| Zinc | 9.037 | 3.776 |
| Indium | 2.724 | 1.114 |
(b) Spent Electrolyte.
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of cathode indium produced | ||
| Cadmium | 12.170 | 5.370 |
| Lead | 15.040 | 7.160 |
| Zinc | 52.270 | 21.840 |
| Indium | 15.750 | 6.444 |
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 secondary indium process wastewater introduced into a POTW should not exceed the following values:
(a) Displacement Supernatant.
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of indium metal produced | ||
| Cadimum | 2.105 | 0.929 |
| Lead | 2.600 | 1.238 |
| Zinc | 9.037 | 3.776 |
| Indium | 2.724 | 1.114 |
(b) Spent Electrolyte.
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of cathode indium produced | ||
| Cadmium | 12.170 | 5.370 |
| Lead | 15.040 | 7.160 |
| Zinc | 52.270 | 21.840 |
| Indium | 15.750 | 6.444 |