Collapse to view only § 421.121 - Specialized definitions.
- § 421.120 - Applicability: Description of the secondary silver subcategory.
- § 421.121 - Specialized definitions.
- § 421.122 - Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
- § 421.123 - Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
- § 421.124 - Standards of performance for new sources.
- § 421.125 - Pretreatment standards for existing sources.
- § 421.126 - Pretreatment standards for new sources.
- § 421.127 - [Reserved]
§ 421.120 - Applicability: Description of the secondary silver subcategory.
The provisions of this subpart are applicable to discharges resulting from the production of silver from secondary silver facilities processing photographic and nonphotographic raw materials.
§ 421.121 - Specialized definitions.
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.
§ 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) |
|---|
1 Within the range of 7.5 to 10.0 at all times.
(c) Subpart L—Precipitation and Filtration of Film Stripping Solutions.
BPT Effluent Limitations
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | 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.
(d) Subpart L—Precipitation and Filtration of Photographic Solutions.
BPT Effluent Limitations
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | 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.
(e) Subpart L—Precipitation and Filtration of Photographic 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 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.
(f) Subpart L—Electrolytic Refining.
BPT Effluent Limitations
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/troy ounce of silver from electrolytic refining | Copper | 1.444 | .760 | Zinc | 1.110 | .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.
(g) Subpart L—Furnace 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 roasted, smelted, or dried | Copper | 1.273 | .670 | Zinc | .978 | .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.
(h) Subpart L—Leaching.
BPT Effluent Limitations
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/troy ounce of silver produced from leaching | Copper | .164 | .086 | Zinc | .126 | .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.
(i) Subpart L—Leaching Wet Air Pollution Control and Precipitation of Nonphotographic 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 produced from leaching or silver 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.
(j) Subpart L—Precipitation and Filtration of Nonphotographic Solutions.
BPT Effluent Limitations
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | 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.
(k) Subpart L—Floor and Equipment Washdown.
BPT Effluent Limitations
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/troy ounce of silver production | Copper | .000 | .000 | Zinc | .000 | .000 | Ammonia (as N) | .000 | .000 | Total suspended solids | .000 | .000 | pH | ( 1) | ( 1) |
|---|
1 Within the range of 7.5 to 10.0 at all times.
§ 421.123 - Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
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) Subpart L—Film Stripping.
BAT Effluent Limitations
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/troy ounce of silver from film stripping | Copper | 64.450 | 30.720 | Zinc | 51.360 | 21.150 | Ammonia (as N) | 6,712.000 | 2,951.000 |
|---|
(b) Subpart L—Film Stripping Wet Air Pollution Control and Precipitation and Filtration of Film Stripping Solutions Wet Air Pollution Control.
BAT 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 | 1.242 | .592 | Zinc | .990 | .408 | Ammonia (as N) | 129.300 | 56.840 |
|---|
(c) Subpart L—Precipitation and Filtration of Film Stripping Solutions.
BAT Effluent Limitations
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/troy ounce of silver precipitated | Copper | 73.690 | 35.120 | Zinc | 58.720 | 24.180 | Ammonia (as N) | 7,674.000 | 3,374.000 |
|---|
(d) Subpart L—Precipitation and Filtration of Photographic Solutions.
BAT Effluent Limitations
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/troy ounce of silver precipitated | Copper | 34.048 | 16.226 | Zinc | 27.132 | 11.172 | Ammonia (as N) | 3,545.000 | 1,559.000 |
|---|
(e) Subpart L—Precipitation and Filtration of Photographic Solutions Wet Air Pollution Control.
BAT 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 photographic solutions | Copper | 15.540 | 7.406 | Zinc | 12.380 | 5.099 | Ammonia (as N) | 1,618.000 | 711.400 |
|---|
(f) Subpart L—Electrolytic Refining.
BAT Effluent Limitations
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/troy ounce of silver from electrolytic refining | Copper | .973 | .464 | Zinc | .775 | .319 | Ammonia (as N) | 101.300 | 44.540 |
|---|
(g) Subpart L—Furnace Wet Air Pollution Control.
BAT Effluent Limitations
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/troy ounce of silver roasted, smelted, or dried | Copper | .000 | .000 | Zinc | .000 | .000 | Ammonia (as N) | .000 | .000 |
|---|
(h) Subpart L—Leaching.
BAT Effluent Limitations
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/troy ounce of silver produced from leaching | Copper | .110 | .053 | Zinc | .088 | .036 | Ammonia (as N) | 11.470 | 5.040 |
|---|
(i) Subpart L—Leaching Wet Air Pollution Control and Precipitation of Nonphotographic Solutions Wet Air Pollution Control.
BAT Effluent Limitations
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/troy ounce of silver produced from leaching or silver precipitated | Copper | 5.671 | 2.703 | Zinc | 4.519 | 1.861 | Ammonia (as N) | 590.500 | 259.600 |
|---|
(j) Subpart L—Precipitation and Filtration of Nonphotographic Solutions.
BAT Effluent Limitations
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/troy ounce of silver precipitated | Copper | 3.930 | 1.873 | Zinc | 3.132 | 1.290 | Ammonia (as N) | 409.300 | 179.900 |
|---|
(k) Subpart L—Floor and Equipment Washdown.
BAT Effluent Limitations
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/troy ounce of silver production | Copper | .000 | .000 | Zinc | .000 | .000 | Ammonia (as N) | .000 | .000 |
|---|
§ 421.124 - Standards of performance for new sources.
Any new source subject to this subpart shall achieve the following new source performance standards:
(a) Subpart L—Film Stripping.
NSPS
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/troy ounce of silver from film stripping | Copper | 64.450 | 30.720 | Zinc | 51.360 | 21.150 | Ammonia (as N) | 6,712.000 | 2,951.000 | Total suspended solids | 755.300 | 604.200 | 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.
NSPS
| 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 | 1.242 | .592 | Zinc | .990 | .408 | Ammonia (as N) | 129.300 | 56.840 | Total suspended solids | 14.550 | 11.640 | pH | ( 1) | ( 1) |
|---|
1 Within the range of 7.5 to 10.0 at all times.
(c) Subpart L—Precipitation and Filtration of Film Stripping Solutions.
NSPS
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/troy ounce of silver precipitated | Copper | 73.690 | 35.120 | Zinc | 58.720 | 24.180 | Ammonia (as N) | 7,674.000 | 3,374.000 | Total suspended solids | 863.600 | 690.900 | pH | ( 1) | ( 1) |
|---|
1 Within the range of 7.5 to 10.0 at all times.
(d) Subpart L—Precipitation and Filtration of Photographic Solutions.
NSPS
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/troy ounce of silver precipitated | Copper | 34.048 | 16.226 | Zinc | 27.132 | 11.172 | Ammonia (as N) | 3,545.000 | 1,559.000 | Total suspended solids | 399.000 | 319.200 | pH | ( 1) | ( 1) |
|---|
1 Within the range of 7.5 to 10.0 at all times.
(e) Subpart L—Precipitation and Filtration of Photographic Solutions Wet Air Pollution Control.
NSPS
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/troy ounce of silver from precipitation and filtration of photographic solutions | Copper | 15.540 | 7.406 | Zinc | 12.380 | 5.099 | Ammonia (as N) | 1,618.000 | 711.400 | Total suspended solids | 182.100 | 145.700 | pH | ( 1) | ( 1) |
|---|
1 Within the range of 7.5 to 10.0 at all times.
(f) Subpart L—Electrolytic Refining.
NSPS
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/troy ounce of silver from electrolytic refining | Copper | .973 | .464 | Zinc | .775 | .319 | Ammonia (as N) | 101.300 | 44.540 | Total suspended solids | 11.400 | 9.120 | pH | ( 1) | ( 1) |
|---|
1 Within the range of 7.5 to 10.0 at all times.
(g) Subpart L—Furnace Wet Air Pollution Control.
NSPS
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/troy ounce of silver roasted, smelted, or dried | Copper | .000 | .000 | Zinc | .000 | .000 | Ammonia (as N) | .000 | .000 | Total suspended solids | .000 | .000 | pH | ( 1) | ( 1) |
|---|
1 Within the range of 7.5 to 10.0 at all times.
(h) Subpart L—Leaching.
NSPS
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/troy ounce of silver produced from leaching | Copper | .110 | .053 | Zinc | .088 | .036 | Ammonia (as N) | 11.470 | 5.040 | Total suspended solids | 1.290 | 1.032 | pH | ( 1) | ( 1) |
|---|
1 Within the range of 7.5 to 10.0 at all times.
(i) Subpart L—Leaching Wet Air Pollution Control and Precipitation of Nonphotographic Solutions Wet Air Pollution Control.
NSPS
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/troy ounce of silver produced from leaching or silver precipitated | Copper | 5.671 | 2.703 | Zinc | 4.519 | 1.861 | Ammonia (as N) | 590.500 | 259.600 | Total suspended solids | 66.450 | 53.160 | pH | ( 1) | ( 1) |
|---|
1 Within the range of 7.5 to 10.0 at all times.
(j) Subpart L—Precipitation and Filtration of Nonphotograhic Solutions.
NSPS
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/troy ounce of silver precipitated | Copper | 3.930 | 1.873 | Zinc | 3.132 | 1.290 | Ammonia (as N) | 409.300 | 179.900 | Total suspended solids | 46.050 | 36.840 | pH | ( 1) | ( 1) |
|---|
1 Within the range of 7.5 to 10.0 at all times.
(k) Subpart L—Floor and Equipment Washdown.
NSPS
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/troy ounce of silver production | Copper | .000 | .000 | Zinc | .000 | .000 | Ammonia (as N) | .000 | .000 | Total suspended solids | .000 | .000 | pH | ( 1) | ( 1) |
|---|
1 Within the range of 7.5 to 10.0 at all times.
§ 421.125 - Pretreatment standards for existing sources.
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 silver process wastewater introduced into a POTW must not exceed the following values.
(a) Subpart L—Film Stripping.
PSES
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/troy ounce of silver from film stripping | Copper | 64.450 | 30.720 | Zinc | 51.360 | 21.150 | Ammonia (as N) | 6,712.000 | 2,951.000 |
|---|
(b) Subpart L—Film Stripping Wet Air Pollution Control and Precipitation and Filtration of Film Stripping Solutions Wet Air Pollution Control.
PSES
| 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 | 1.242 | .592 | Zinc | .990 | .408 | Ammonia (as N) | 129.300 | 56.840 |
|---|
(c) Subpart L—Precipitation and Filtration of Film Stripping Solutions.
PSES
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/troy ounce of silver precipitated | Copper | 73.690 | 35.120 | Zinc | 58.720 | 24.180 | Ammonia (as N) | 7,674.000 | 3,374.000 |
|---|
(d) Subpart L—Precipitation and Filtration of Photographic Solutions.
PSES
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/troy ounce of silver precipitated | Copper | 34.048 | 16.226 | Zinc | 27.132 | 11.172 | Ammonia (as N) | 3,545.000 | 1,559.000 |
|---|
(e) Subpart L—Precipitation and Filtration of Photographic Solutions Wet Air Pollution Control.
PSES
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/troy ounce of silver from precipitation and filtration of photographic solutions | Copper | 15.540 | 7.406 | Zinc | 12.380 | 5.099 | Ammonia (as N) | 1,618.000 | 711.400 |
|---|
(f) Subpart L—Electrolytic Refining.
PSES
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/troy ounce of silver from electrolytic refining | Copper | .973 | .464 | Zinc | .775 | .319 | Ammonia (as N) | 101.300 | 44.540 |
|---|
(g) Subpart L—Furnace Wet Air Pollution Control.
PSES
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/troy ounce of silver roasted, smelted, or dried | Copper | .000 | .000 | Zinc | .000 | .000 | Ammonia (as N) | .000 | .000 |
|---|
(h) Subpart L—Leaching.
PSES
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/troy ounce of silver produced from leaching | Copper | .110 | .053 | Zinc | .088 | .036 | Ammonia (as N) | 11.470 | 5.040 |
|---|
(i) Subpart L—Leaching Wet Air Pollution Control and Precipitation of Nonphotographic Solutions Wet Air Pollution Control.
PSES
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/troy ounce of silver produced from leaching or silver precipitated | Copper | 5.671 | 2.703 | Zinc | 4.519 | 1.861 | Ammonia (as N) | 590.500 | 259.600 |
|---|
(j) Subpart L—Precipitation and Filtration of Nonphotographic Solutions.
PSES
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/troy ounce of silver precipitated | Copper | 3.930 | 1.873 | Zinc | 3.132 | 1.290 | Ammonia (as N) | 409.300 | 179.900 |
|---|
(k) Subpart L—Floor and Equipment Washdown.
PSES
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/troy ounce of silver production | Copper | .000 | .000 | Zinc | .000 | .000 | Ammonia (as N) | .000 | .000 |
|---|
§ 421.126 - Pretreatment standards for new sources.
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 silver process wastewater introduced into a POTW shall not exceed the following values:
(a) Subpart L—Film Stripping.
PSNS
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/troy ounce of silver from film stripping | Copper | 64.450 | 30.720 | Zinc | 51.360 | 21.150 | Ammonia (as N) | 6,712.000 | 2,951.000 |
|---|
(b) Subpart L—Film Stripping Wet Air Pollution Control and Precipitation and Filtration of Film Stripping Solutions Wet Air Pollution Control.
PSNS
| 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 | 1.242 | .592 | Zinc | .990 | .408 | Ammonia (as N) | 129.300 | 56.840 |
|---|
(c) Subpart L—Precipitation and Filtration of Film Stripping Solutions.
PSNS
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/troy ounce of silver precipitated | Copper | 73.690 | 35.120 | Zinc | 58.720 | 24.180 | Ammonia (as N) | 7,674.000 | 3,374.000 |
|---|
(d) Subpart L—Precipitation and Filtration of Photographic Solutions.
PSNS
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/troy ounce of silver precipitated | Copper | 34.048 | 16.226 | Zinc | 27.132 | 11.172 | Ammonia (as N) | 3,545.000 | 1,559.000 |
|---|
(e) Subpart L—Precipitation and Filtration of Photographic Solutions Wet Air Pollution Control.
PSNS
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/troy ounce of silver from precipitation and filtration of photographic solutions | Copper | 15.540 | 7.406 | Zinc | 12.380 | 5.099 | Ammonia (as N) | 1,618.000 | 711.400 |
|---|
(f) Subpart L—Electrolytic Refining.
PSNS
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/troy ounce of silver from electrolytic refining | Copper | .973 | .464 | Zinc | .775 | .319 | Ammonia (as N) | 101.300 | 44.540 |
|---|
(g) Subpart L—Furnace Wet Air Pollution Control.
PSNS
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/troy ounce of silver roasted, smelted or dried | Copper | .000 | .000 | Zinc | .000 | .000 | Ammonia (as N) | .000 | .000 |
|---|
(h) Subpart L—Leaching.
PSNS
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/troy ounce of silver produced from leaching | Copper | .110 | .053 | Zinc | .088 | .036 | Ammonia (as N) | 11.470 | 5.040 |
|---|
(i) Subpart L—Leaching Wet Air Pollution Control and Precipitation of Nonphotographic Solutions Wet Air Pollution Control.
PSNS
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/troy ounce of silver produced from leaching or silver precipitated | Copper | 5.671 | 2.703 | Zinc | 4.519 | 1.861 | Ammonia (as N) | 590.500 | 259.600 |
|---|
(j) Subpart L—Precipitation and Filtration of Nonphotographic Solutions.
PSNS
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/troy ounce of silver precipitated | Copper | 3.930 | 1.873 | Zinc | 3.132 | 1.290 | Ammonia (as N) | 409.300 | 179.900 |
|---|
(k) Subpart L—Floor and Equipment Washdown.
PSNS
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/troy ounce of silver production | Copper | .000 | .000 | Zinc | .000 | .000 | Ammonia (as N) | .000 | .000 |
|---|