40 CFR 421.125 - Pretreatment standards for existing sources.
§ 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.
| 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.
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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.
| 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 |
| 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 |
| 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 |
Title 40 published on 2012-07-01
no entries appear in the Federal Register after this date.
This is a list of United States Code sections, Statutes at Large, Public Laws, and Presidential Documents, which provide rulemaking authority for this CFR Part.
This list is taken from the Parallel Table of Authorities and Rules provided by GPO [Government Printing Office].
It is not guaranteed to be accurate or up-to-date, though we do refresh the database weekly. More limitations on accuracy are described at the GPO site.
