Wis. Admin. Code Department of Natural Resources NR 274.122
Except as provided in 40 CFR 125.30 to 125.32, any existing point source subject to this subchapter shall achieve the following effluent limitations representing the degree of effluent reduction attainable by application of BPT:
Table 12-1
Secondary Silver Film Stripping
BPT Effluent Limitations | ||
Maximum for any 1 day | Maximum for monthly average | |
Pollutant or pollutant property | 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.
Table 12-2
Secondary Silver Film Stripping Wet Air Pollution Control and Precipitation and Filtration of Film Stripping Solutions Wet Air Pollution Control
BPT Effluent Limitations | ||
Maximum for any 1 day | Maximum for monthly average | |
Pollutant or pollutant property | mg/troy ounce precipitation and stripping | of silver from filtration of film solutions |
Copper | 1.843 | 0.970 |
Zinc | 1.416 | 0.592 |
Ammonia (as N) | 129.300 | 56.840 |
Total suspended solids | 39.770 | 18.920 |
pH | (1) | (1) |
(1) Within the range of 7.5 to 10.0 at all times.
Table 12-3
Secondary Silver Precipitation and Filtration of Film Stripping Solutions
BPT Effluent Limitations | ||
Maximum for any 1 day | Maximum for monthly average | |
Pollutant or pollutant property | mg/troy ounce of silver precipitated | |
Copper | 109.400 | 57.570 |
Zinc | 84.050 | 35.120 |
Ammonia (as N) | 7,674.000 | 3,374.000 |
Total suspended solids | 2,361.000 | 1,123.000 |
pH | (1) | (1) |
(1) Within the range of 7.5 to 10.0 at all times.
Table 12-4
Secondary Silver Precipitation and Filtration of Photographic Solutions
BPT Effluent Limitations | ||
Maximum for any 1 day | Maximum for monthly average | |
Pollutant or pollutant property | mg/troy ounce of silver precipitated | |
Copper | 50.540 | 26.600 |
Zinc | 38.836 | 16.226 |
Ammonia (as N) | 3,545.000 | 1,559.000 |
Total suspended solids | 1,090.600 | 518.700 |
pH | (1) | (1) |
(1) Within the range of 7.5 to 10.0 at all times.
Table 12-5
Secondary Silver Precipitation and Filtration of Photographic Solutions Wet Air Pollution Control
BPT Effluent Limitations | ||
Maximum for any 1 day | Maximum for monthly average | |
Pollutant or pollutant property | mg/troy ounce of silver from precipitation and filtration of photographic solutions | |
Copper | 23.070 | 12.140 |
Zinc | 17.730 | 7.406 |
Ammonia (as N) | 1,618.000 | 711.400 |
Total suspended solids | 497.800 | 236.800 |
pH | (1) | (1) |
(1) Within the range of 7.5 to 10.0 at all times.
Table 12-6
Secondary Silver Electrolytic Refining
BPT Effluent Limitations | ||
Maximum for any 1 day | Maximum for monthly average | |
Pollutant or pollutant property | mg/troy ounce of silver from electrolytic refining | |
Copper | 1.444 | 0.760 |
Zinc | 1.110 | 0.464 |
Ammonia (as N) | 101.300 | 44.540 |
Total suspended solids | 31.160 | 14.820 |
pH | (1) | (1) |
(1) Within the range of 7.5 to 10.0 at all times.
Table 12-7
Secondary Silver Furnace Wet Air Pollution Control
BPT Effluent Limitations | ||
Maximum for any 1 day | Maximum for monthly average | |
Pollutant or pollutant property | mg/troy ounce of silver roasted, smelted, or dried | |
Copper | 1.273 | 0.670 |
Zinc | 0.978 | 0.409 |
Ammonia (as N) | 89.310 | 39.260 |
Total suspended solids | 27.470 | 13.070 |
pH | (1) | (1) |
(1) Within the range of 7.5 to 10.0 at all times.
Table 12-8
Secondary Silver Leaching
BPT Effluent Limitations | ||
Maximum for any 1 day | Maximum for monthly average | |
Pollutant or pollutant property | mg/troy ounce of silver produced from leaching | |
Copper | 0.164 | 0.086 |
Zinc | 0.126 | 0.053 |
Ammonia (as N) | 11.470 | 5.040 |
Total suspended solids | 3.526 | 1.677 |
pH | (1) | (1) |
(1) Within the range of 7.5 to 10.0 at all times.
Table 12-9
Secondary Silver Leaching Wet Air Pollution Control and Precipitation of Nonphotographic Solutions Wet Air Pollution Control
BPT Effluent Limitations | ||
Maximum for any 1 day | Maximum for monthly average | |
Pollutant or pollutant property | mg/troy ounce of silver produced from leaching or precipitated | |
Copper | 8.417 | 4.430 |
Zinc | 6.468 | 2.703 |
Ammonia (as N) | 590.500 | 259.600 |
Total suspended solids | 181.700 | 86.390 |
pH | (1) | (1) |
(1) Within the range of 7.5 to 10.0 at all times.
Table 12-10
Secondary Silver Precipitation and Filtration of Nonphotographic Solutions
BPT Effluent Limitations | ||
Maximum for any 1 day | Maximum for monthly average | |
Pollutant or pollutant property | mg/troy ounce of silver precipitated | |
Copper | 5.833 | 3.070 |
Zinc | 4.482 | 1.873 |
Ammonia (as N) | 409.300 | 179.900 |
Total suspended solids | 125.900 | 59.870 |
pH | (1) | (1) |
(1) Within the range of 7.5 to 10.0 at all times.
Table 12-11
Secondary Silver Floor and Equipment Washdown
BPT Effluent Limitations | ||
Maximum for any 1 day | Maximum for monthly average | |
Pollutant or pollutant property | mg/troy ounce of silver production | |
Copper | 0.000 | 0.000 |
Zinc | 0.000 | 0.000 |
Ammonia (as N) | 0.000 | 0.000 |
Total suspended solids | 0.000 | 0.000 |
pH | (1) | (1) |
(1) Within the range of 7.5 to 10.0 at all times.
Wis. Admin. Code Department of Natural Resources NR 274.122