['Water Programs']
['Water Quality', 'Point Sources']
02/03/2025
Copyright 2025 J. J. Keller & Associate, Inc. For re-use options please contact copyright@jjkeller.com or call 800-558-5011.
...
§421.290 Applicability: Description of the secondary tin subcategory.
The provisions of this subpart are applicable to discharges resulting from the production of tin at secondary tin facilities utilizing either pyrometallurgical or hydrometallurgical processes to recover tin from secondary materials.
§421.291 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.
§421.292 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) Tin smelter SO2 scrubber.
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of crude tapped tin metal produced | ||
| Arsenic | 19.220 | 8.554 |
| Lead | 3.863 | 1.840 |
| Iron | 11.040 | 5.611 |
| Tin | 3.495 | 2.024 |
| Total suspended solids | 377.100 | 179.400 |
| pH | ( 1) | ( 1) |
| 1 Within the range of 7.5 to 10.0 at all times. | ||
(b) Dealuminizing rinse.
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of dealuminized scrap produced | ||
| Lead | 0.015 | 0.007 |
| Cyanide (total) | 0.010 | 0.004 |
| Fluoride | 1.225 | 0.700 |
| Tin | 0.013 | 0.008 |
| Total suspended solids | 1.435 | 0.683 |
| pH | ( 1) | ( 1) |
| 1 Within the range of 7.5 to 10.0 at all times. | ||
(c) Tin mud acid neutralization filtrate.
| Pollutant or pollutant property | Minimum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of neutralized, dewatered tin mud produced | ||
| Lead | 2.120 | 1.009 |
| Cyanide (total) | 1.464 | 0.606 |
| Fluoride | 176.600 | 100.400 |
| Tin | 1.918 | 1.110 |
| Total suspended solids | 206.900 | 98.420 |
| pH | ( 1) | ( 1) |
| 1 Within the range of 7.5 to 10.0 at all times. | ||
(d) Tin hydroxide wash.
| Pollutant or pollutant property | Minimum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of tin hydroxide washed | ||
| Lead | 5.020 | 2.391 |
| Cyanide (total) | 3.466 | 1.434 |
| Fluoride | 418.400 | 237.900 |
| Tin | 4.542 | 2.630 |
| Total suspended solids | 490.100 | 233.100 |
| pH | ( 1) | ( 1) |
| 1 Within the range of 7.5 to 10.0 at all times. | ||
(e) Spent electrowinning solution from new scrap.
| Pollutant or pollutant property | Minimum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of cathode tin produced | ||
| Lead | 7.056 | 3.360 |
| Cyanide (total) | 4.872 | 2.016 |
| Fluoride | 588.000 | 334.300 |
| Tin | 6.384 | 3.696 |
| Total suspended solids | 688.800 | 327.600 |
| pH | ( 1) | ( 1) |
| 1 Within the range of 7.5 to 10.0 at all times. | ||
(f) Spent electrowinning solution from municipal solid waste.
| Pollutant or pollutant property | Minimum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of MSW scrap used as raw material | ||
| Lead | 0.050 | 0.024 |
| Cyanide (total) | 0.035 | 0.014 |
| Fluoride | 4.165 | 2.368 |
| Tin | 0.045 | 0.026 |
| Total suspended solids | 4.879 | 2.321 |
| pH | ( 1) | ( 1) |
| 1 Within the range of 7.5 to 10.0 at all times. | ||
(g) Tin hydroxide supernatant from scrap.
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of tin metal recovered from scrap | ||
| Lead | 23.370 | 11.130 |
| Cyanide (total) | 16.140 | 6.677 |
| Fluoride | 1,947.000 | 1,107.000 |
| Tin | 21.140 | 12.240 |
| Total suspended solids | 2,281.000 | 1,085.000 |
| pH | ( 1) | ( 1) |
| 1 Within the range of 7.5 to 10.0 at all times. | ||
(h) Tin hydroxide supernatant from plating solutions and sludges.
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of tin metal recovered from plating solutions and sludges | ||
| Lead | 48.30 | 23.00 |
| Cyanide (total) | 33.35 | 13.80 |
| Fluoride | 4,025.00 | 2,289.00 |
| Tin | 43.70 | 25.30 |
| Total suspended solids | 4,715.00 | 2,243.00 |
| pH | ( 1) | ( 1) |
| 1 Within the range of 7.5 to 10.0 at all times. | ||
(i) Tin hydroxide filtrate.
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of tin metal produced | ||
| Lead | 10.520 | 5.009 |
| Cyanide (total) | 7.263 | 3.005 |
| Fluoride | 876.500 | 498.400 |
| Tin | 9.517 | 5.510 |
| Total suspended solids | 1,027.000 | 488.400 |
| pH | ( 1) | ( 1) |
| 1 Within the range of 7.5 to 10.0 at all times. | ||
§421.293 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) Tin smelter SO2 scrubber.
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of crude tapped tin produced | ||
| Arsenic | 12.790 | 5.703 |
| Lead | 2.575 | 1.196 |
| Iron | 11.040 | 5.611 |
| Tin | 3.495 | 2.024 |
(b) Dealuminizing rinse.
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of dealuminized scrap produced | ||
| Lead | 0.010 | 0.005 |
| Cyanide (total) | 0.007 | 0.003 |
| Fluoride | 1.225 | 0.697 |
| Tin | 0.013 | 0.008 |
(c) Tin mud acid neutralization filtrate.
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of neutralized dewatered tin mud produced | ||
| Lead | 1.413 | 0.656 |
| Cyanide (total) | 1.009 | 0.404 |
| Fluoride | 176.600 | 100.400 |
| Tin | 1.918 | 1.110 |
(d) Tin hydroxide wash.
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of tin hydroxide washed | ||
| Lead | 3.347 | 1.554 |
| Cyanide (total) | 2.391 | 0.956 |
| Fluoride | 418.400 | 237.900 |
| Tin | 4.542 | 2.630 |
(e) Spent electrowinning solution from new scrap.
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of cathode tin produced | ||
| Lead | 4.704 | 2.184 |
| Cyanide (total) | 3.360 | 1.344 |
| Fluoride | 588.000 | 334.300 |
| Tin | 6.384 | 3.696 |
(f) Spent electrowinning solution from municipal solid waste.
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of MSW scrap used as raw material | ||
| Lead | 0.033 | 0.015 |
| Cyanide (total) | 0.024 | 0.010 |
| Fluoride | 4.165 | 2.368 |
| Tin | 0.045 | 0.026 |
(g) Tin hydroxide supernatant from scrap.
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of tin metal recovered from scrap | ||
| Lead | 15.580 | 7.233 |
| Cyanide (total) | 11.130 | 4.451 |
| Fluoride | 1,947.000 | 1,107.000 |
| Tin | 21.140 | 21.240 |
(h) Tin hydroxide supernatant from plating solutions and sludges.
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of tin metal recovered from plating solutions and sludges | ||
| Lead | 32.20 | 14.95 |
| Cyanide (total) | 23.00 | 9.20 |
| Fluoride | 4,025.00 | 2,289.00 |
| Tin | 43.70 | 25.30 |
(i) Tin hydroxide filtrate.
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of tin metal produced | ||
| Lead | 7.012 | 3.256 |
| Cyanide (total) | 5.009 | 2.004 |
| Fluoride | 876.500 | 498.400 |
| Tin | 9.517 | 5.510 |
§421.294 Standards of performance for new sources.
Any new source subject to this subpart shall achieve the following new source performance standards:
(a) Tin smelter SO2 scrubber.
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of crude tapped tin produced | ||
| Arsenic | 12.790 | 5.703 |
| Lead | 2.575 | 1.196 |
| Iron | 11.040 | 5.611 |
| Tin | 3.495 | 2.024 |
| Total suspended solids | 138.000 | 110.400 |
| pH | ( 1) | ( 1) |
| 1 Within the range of 7.5 to 10.0 at all times. | ||
(b) Dealuminizing rinse.
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of dealuminized scrap produced | ||
| Lead | 0.010 | 0.005 |
| Cyanide (total) | 0.007 | 0.003 |
| Fluoride | 1.225 | 0.697 |
| Tin | 0.013 | 0.008 |
| Total suspended solids | 0.525 | 0.420 |
| pH | ( 1) | ( 1) |
| 1 Within the range of 7.5 to 10.0 at all times. | ||
(c) Tin mud acid neutralization filtrate.
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of neutralized dewatered tin mud produced | ||
| Lead | 1.413 | 0.656 |
| Cyanide (total) | 1.009 | 0.404 |
| Fluoride | 176.600 | 100.400 |
| Tin | 1.918 | 1.110 |
| Total suspended solids | 75.710 | 60.560 |
| pH | ( 1) | ( 1) |
| 1 Within the range of 7.5 to 10.0 at all times. | ||
(d) Tin hydroxide wash.
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of tin hydroxide washed | ||
| Lead | 3.347 | 1.554 |
| Cyanide (total) | 2.391 | 0.956 |
| Fluoride | 418.400 | 237.900 |
| Tin | 4.542 | 2.630 |
| Total suspended solids | 179.300 | 143.400 |
| pH | ( 1) | ( 1) |
| 1 Within the range of 7.5 to 10.0 at all times. | ||
(e) Spent electrowinning solution from new scrap.
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of cathode tin produced | ||
| Lead | 4.704 | 2.184 |
| Cyanide (total) | 3.360 | 1.344 |
| Fluoride | 588.000 | 334.300 |
| Tin | 6.384 | 3.696 |
| Total suspended solids | 252.000 | 201.600 |
| pH | ( 1) | ( 1) |
| 1 Within the range of 7.5 to 10.0 at all times. | ||
(f) Spent electrowinning solution from municipal solid waste.
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of MSW scrap used as raw material | ||
| Lead | 0.033 | 0.015 |
| Cyanide (total) | 0.024 | 0.010 |
| Fluoride | 4.165 | 2.368 |
| Tin | 0.045 | 0.026 |
| Total suspended solids | 1.785 | 1.428 |
| pH | ( 1) | ( 1) |
| 1 Within the range of 7.5 to 10.0 at all times. | ||
(g) Tin hydroxide supernatant from scrap.
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of tin metal recovered from scrap | ||
| Lead | 15.580 | 7.233 |
| Cyanide (total) | 11.130 | 4.451 |
| Fluoride | 1,947.000 | 1,107.000 |
| Tin | 21.140 | 12.240 |
| Total suspended solids | 834.600 | 667.700 |
| pH | ( 1) | ( 1) |
| 1 Within the range of 7.5 to 10.0 at all times. | ||
(h) Tin hydroxide supernatant from plating solutions and sludges.
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of tin metal recovered from plating solutions and sludges | ||
| Lead | 32.20 | 14.95 |
| Cyanide (total) | 23.00 | 9.20 |
| Fluoride | 4,025.00 | 2,289.00 |
| Tin | 43.70 | 25.30 |
| Total suspended solids | 1,725.00 | 1,380.00 |
| pH | ( 1) | ( 1) |
| 1 Within the range of 7.5 to 10.0 at all times. | ||
(i) Tin hydroxide filtrate.
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of tin metal produced | ||
| Lead | 7.012 | 3.256 |
| Cyanide (total) | 5.009 | 2.004 |
| Fluoride | 876.500 | 498.400 |
| Tin | 9.517 | 5.510 |
| Total suspended solids | 375.700 | 300.500 |
| pH | ( 1) | ( 1) |
| 1 Within the range of 7.5 to 10.0 at all times. | ||
§421.295 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 tin process wastewater introduced into a POTW must not exceed the following values:
(a) Tin smelter SO2 scrubber.
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of crude tapped tin produced | ||
| Arsenic | 12.790 | 5.703 |
| Lead | 2.575 | 1.196 |
| Iron | 11.040 | 5.611 |
| Tin | 3.495 | 2.024 |
(b) Dealuminizing rinse.
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of dealuminized scrap produced | ||
| Lead | 0.010 | 0.005 |
| Cyanide (total) | 0.007 | 0.003 |
| Fluoride | 1.225 | 0.697 |
| Tin | 0.013 | 0.008 |
(c) Tin mud acid neutralization filtrate.
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of neutralized dewatered tin mud produced | ||
| Lead | 1.413 | 0.656 |
| Cyanide (total) | 1.009 | 0.404 |
| Fluoride | 176.600 | 100.400 |
| Tin | 1.918 | 1.110 |
(d) Tin hydroxide wash.
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of tin hydroxide washed | ||
| Lead | 3.347 | 1.554 |
| Cyanide (total) | 2.391 | 0.956 |
| Fluoride | 418.400 | 237.900 |
| Tin | 4.542 | 2.630 |
(e) Spent electrowinning solution from new scrap.
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of cathode tin produced | ||
| Lead | 4.704 | 2.184 |
| Cyanide (total) | 3.360 | 1.344 |
| Fluoride | 588.000 | 334.300 |
| Tin | 6.384 | 3.696 |
(f) Spent electrowinning solution from municipal solid waste.
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of MSW scrap used as raw material | ||
| Lead | 0.033 | 0.015 |
| Cyanide (total) | 0.024 | 0.010 |
| Fluoride | 4.165 | 2.368 |
| Tin | 0.045 | 0.026 |
(g) Tin hydroxide supernatant from scrap.
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of tin metal recovered from scrap | ||
| Lead | 15.580 | 7.233 |
| Cyanide (total) | 11.130 | 4.451 |
| Fluoride | 1,947.000 | 1,107.000 |
| Tin | 21.140 | 12.240 |
(h) Tin hydroxide supernatant from plating solutions and sludges.
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of tin metal recovered from plating solutions and sludges | ||
| Lead | 32.20 | 14.95 |
| Cyanide (total) | 23.00 | 9.20 |
| Fluoride | 4,025.00 | 2,289.00 |
| Tin | 43.70 | 25.30 |
(i) Tin hydroxide filtrate.
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of tin metal produced | ||
| Lead | 7.012 | 3.256 |
| Cyanide (total) | 5.009 | 2.004 |
| Fluoride | 876.500 | 498.400 |
| Tin | 9.517 | 5.510 |
§421.296 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 tin process wastewater introduced into a POTW shall not exceed the following values:
(a) Tin smelter SO2 scrubber.
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of crude tapped tin produced | ||
| Arsenic | 12.790 | 5.703 |
| Lead | 2.575 | 1.196 |
| Iron | 11.040 | 5.611 |
| Tin | 3.495 | 2.024 |
(b) Dealuminizing rinse.
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of dealuminized scrap produced | ||
| Lead | 0.010 | 0.005 |
| Cyanide (total) | 0.007 | 0.003 |
| Fluoride | 1.225 | 0.697 |
| Tin | 0.013 | 0.008 |
(c) Tin mud acid neutralization filtrate.
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million of pounds) of neutralized dewatered tin mud produced | ||
| Lead | 1.413 | 0.656 |
| Cyanide (total) | 1.009 | 0.404 |
| Fluoride | 176.600 | 100.400 |
| Tin | 1.918 | 1.110 |
(d) Tin hydroxide wash.
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of tin hydroxide washed | ||
| Lead | 3.347 | 1.554 |
| Cyanide (total) | 2.391 | 0.956 |
| Fluoride | 418.400 | 237.900 |
| Tin | 4.542 | 2.630 |
(e) Spent electrowinning solution from new scrap.
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of cathode tin produced | ||
| Lead | 4.704 | 2.184 |
| Cyanide (total) | 3.360 | 1.344 |
| Fluoride | 588.000 | 334.300 |
| Tin | 6.384 | 3.696 |
(f) Spent electrowinning solution from municipal solid waste.
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of MSW scrap used as raw material | ||
| Lead | 0.033 | 0.015 |
| Cyanide (total) | 0.024 | 0.010 |
| Fluoride | 4.165 | 2.368 |
| Tin | 0.045 | 0.026 |
(g) Tin hydroxide supernatant from scrap.
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of tin metal recovered from scrap | ||
| Lead | 15.580 | 7.233 |
| Cyanide (total) | 11.130 | 4.451 |
| Fluoride | 1,947.000 | 1,107.000 |
| Tin | 21.140 | 12.240 |
(h) Tin hydroxide supernatant from plating solutions and ludges.
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of tin metal recovered from plating solutions and sludges | ||
| Lead | 32.20 | 14.95 |
| Cyanide (total) | 23.00 | 9.20 |
| Fluoride | 4,025.00 | 2,289.00 |
| Tin | 43.70 | 25.30 |
(i) Tin hydroxide filtrate.
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/kg (pounds per million pounds) of tin metal produced | ||
| Lead | 7.012 | 3.256 |
| Cyanide (total) | 5.009 | 2.004 |
| Fluoride | 876.500 | 498.400 |
| Tin | 9.517 | 5.510 |
§421.297 [Reserved]
READ MORESHOW LESS
['Water Programs']
['Water Quality', 'Point Sources']
Load More
J. J. Keller is the trusted source for DOT / Transportation, OSHA / Workplace Safety, Human Resources, Construction Safety and Hazmat / Hazardous Materials regulation compliance products and services. J. J. Keller helps you increase safety awareness, reduce risk, follow best practices, improve safety training, and stay current with changing regulations.
Copyright 2025 J. J. Keller & Associate, Inc. For re-use options please contact copyright@jjkeller.com or call 800-558-5011.