The provisions of this subpart are applicable to discharges resulting from the manufacture of chromium metal by the electrolytic process. They are not applicable to discharges resulting from the manufacture of chromium metal by aluminothermic or other methods.
For the purpose of this subpart:
(a) Except as provided below, the general definitions, abbreviations and methods of analysis set forth in 40 CFR part 401 shall apply to this subpart.
Except as provided in §§ 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 (BPT):
| Effluent characteristic
| Effluent limitations
|
|---|
| Maximum for any 1 day
| Average of daily values for 30 consecutive days shall not exceed—
|
|---|
| Metric units (kg/kkg of product)
|
| TSS | 5.276 | 2.638
|
| Manganese | 2.111 | 1.055
|
| Chromium | 0.106 | 0.053
|
| Ammonia-N | 10.553 | 5.276
|
| pH | (
1) | (
1)
|
| English units (lb/1,000 lb of product)
|
| TSS | 5.276 | 2.638
|
| Manganese | 2.111 | 1.055
|
| Chromium | 0.106 | 0.053
|
| Ammonia-N | 10.553 | 5.276
|
| pH | (
1) | (
1)
|
The following limitations establish the quantity or quality of pollutants or pollutant properties, controlled by this section, which may be discharged by a point source subject to the provisions of this subpart after application of the best available technology economically achievable:
| Effluent characteristic
| Effluent limitations
|
|---|
| Maximum for any 1 day
| Average of daily values for 30 consecutive days shall not exceed—
|
|---|
| Metric units (kg/kkg of product)
|
| Manganese | 0.530 | 0.265
|
| Chromium | .053 | .027
|
| Ammonia-N | 5.297 | 2.649
|
| English units (lb/1,000 lb of product)
|
| Manganese | 0.530 | 0.265
|
| Chromium | .053 | .027
|
| Ammonia-N | 5.297 | 2.649 |
Except as provided in §§ 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 conventional pollutant control technology (BCT): The limitations shall be the same as those specified for conventional pollutants (which are defined in § 401.16) in § 424.72 of this subpart for the best practicable control technology currently available (BPT).
[51 FR 25000, July 9, 1986]
authority: Secs. 301, 304(b) and (c), 306(b) and (c), 307(c) of the Federal Water Pollution Control Act, as amended;
33 U.S.C. 1251,
1311,
1314,
1316,
1317; 86 Stat. 816
source: 39 FR 6809, Feb. 22, 1974, unless otherwise noted.
cite as: 40 CFR 424.71