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§ 421.122 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) Subpart L—Film Stripping.
BPT Effluent Limitations
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
---|---|---|
mg/troy ounce of silver from film stripping | ||
Copper | 95.670 | 50.350 |
Zinc | 73.510 | 30.720 |
Ammonia (as N) | 6,712.000 | 2,951.000 |
Total suspended solids | 2,065.000 | 981.800 |
pH | ( 1) | ( 1) |
1 Within the range of 7.5 to 10.0 at all times.
(b) Subpart L—Film Stripping Wet Air Pollution Control and Precipitation and Filtration of Film Stripping Solutions Wet Air Pollution Control.
BPT Effluent Limitations
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
---|---|---|
mg/troy ounce of silver from precipitation and filtration of film stripping solutions | ||
Copper | 1.843 | .970 |
Zinc | 1.416 | .592 |
Ammonia (as N) | 129.300 | 56.840 |
Total suspended solids | 39.770 | 18.920 |
pH | ( 1) | ( 1) |