Regulations last checked for updates: Nov 23, 2024
Title 40 - Protection of Environment last revised: Nov 21, 2024
§ 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.
BPT Limitations for the Secondary Tin Subcategory
| 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)
|
(b) Dealuminizing rinse.
BPT Limitations for the Secondary Tin Subcategory
| 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)
|
(c) Tin mud acid neutralization filtrate.
BPT Limitations for the Secondary Tin Subcategory
| 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)
|
(d) Tin hydroxide wash.
BPT Limitations for the Secondary Tin Subcategory
| 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)
|
(e) Spent electrowinning solution from new scrap.
BPT Limitations for the Secondary Tin Subcategory
| 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)
|
(f) Spent electrowinning solution from municipal solid waste.
BPT Limitations for the Secondary Tin Subcategory
| 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)
|
(g) Tin hydroxide supernatant from scrap.
BPT Limitations for the Secondary Tin Subcategory
| 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)
|
(h) Tin hydroxide supernatant from plating solutions and sludges.
BPT Limitations for the Secondary Tin Subcategory
| 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)
|
(i) Tin hydroxide filtrate.
BPT Limitations for the Secondary Tin Subcategory
| 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)
|
§ 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.
BAT Limitations for the Secondary Tin Subcategory
| 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.
BAT Limitations for the Secondary Tin Subcategory
| 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.
BAT Limitations for the Secondary Tin Subcategory
| 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.
BAT Limitations for the Secondary Tin Subcategory
| 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.
BAT Limitations for the Secondary Tin Subcategory
| 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.
BAT Limitations for the Secondary Tin Subcategory
| 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.
BAT Limitations for the Secondary Tin Subcategory
| 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.
BAT Limitations for the Secondary Tin Subcategory
| 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.
BAT Limitations for the Secondary Tin Subcategory
| 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.
NSPS for the Secondary Tin Subcategory
| 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)
|
(b) Dealuminizing rinse.
NSPS for the Secondary Tin Subcategory
| 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)
|
(c) Tin mud acid neutralization filtrate.
NSPS for the Secondary Tin Subcategory
| 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)
|
(d) Tin hydroxide wash.
NSPS for the Secondary Tin Subcategory
| 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)
|
(e) Spent electrowinning solution from new scrap.
NSPS for the Secondary Tin Subcategory
| 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)
|
(f) Spent electrowinning solution from municipal solid waste.
NSPS for the Secondary Tin Subcategory
| 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)
|
(g) Tin hydroxide supernatant from scrap.
NSPS for the Secondary Tin Subcategory
| 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)
|
(h) Tin hydroxide supernatant from plating solutions and sludges.
NSPS for the Secondary Tin Subcategory
| 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)
|
(i) Tin hydroxide filtrate.
NSPS for the Secondary Tin Subcategory
| 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)
|
§ 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.
PSES for the Secondary Tin Subcategory
| 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.
PSES for the Secondary Tin Subcategory
| 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.
PSES for the Secondary Tin Subcategory
| 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.
PSES for the Secondary Tin Subcategory
| 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.
PSES for the Secondary Tin Subcategory
| 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.
PSES for the Secondary Tin Subcategory
| 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.
PSES for the Secondary Tin Subcategory
| 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.
PSES for the Secondary Tin Subcategory
| 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.
PSES for the Secondary Tin Subcategory
| 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.
PSNS for the Secondary Tin Subcategory
| 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.
PSNS for the Secondary Tin Subcategory
| 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.
PSNS for the Secondary Tin Subcategory
| 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.
PSNS for the Secondary Tin Subcategory
| 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.
PSNS for the Secondary Tin Subcategory
| 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.
PSNS for the Secondary Tin Subcategory
| 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.
PSNS for the Secondary Tin Subcategory
| 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.
PSNS for the Secondary Tin Subcategory
| 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.
PSNS for the Secondary Tin Subcategory
| 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]
authority: Secs. 301, 304 (b), (c), (e), and (g), 306 (b) and (c), 307 (b) and (c), 308 and 501 of the Clean Water Act (the Federal Water Pollution Control Act Amendments of 1972, as amended by the Clean Water Act of 1977) and the Water Quality Act of 1987 (the “Act”);
33 U.S.C. 1311,
1314,
c,
e,
and, 1316 (b) and
c, 1317 (b) and
c,
1318; 86 Stat. 816, Pub. L. 92-500; 91 Stat. 1567, Pub. L. 95-217; 101 Stat. 7, Pub. L. 100-4
source: 49 FR 8790, Mar. 8, 1984, unless otherwise noted.
cite as: 40 CFR 421.293