40Protection of Environment282006-07-012006-07-01falseSecondary Aluminum Smelting SubcategoryCSubpart CProtection of EnvironmentENVIRONMENTAL PROTECTION AGENCY (CONTINUED)EFFLUENT GUIDELINES AND STANDARDSNONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORYSubpart C—Secondary Aluminum Smelting Subcategory§ 421.30Applicability: Description of the secondary aluminum smelting subcategory.
The provisions of this subpart are applicable to discharges resulting from the recovery, processing, and remelting of aluminum scrap to produce metallic aluminum alloys.
§ 421.31Specialized definitions.
For the purpose of this subpart:
(a) Except as provided below, the general definitions, abbreviations and methods of analysis set forth in part 401 of this chapter shall apply to this subpart.
(b) The term product shall mean hot aluminum metal.
(c) At-the-source means at or before the commingling of delacquering scrubber liquor blowdown with other process or nonprocess wastewaters.
§ 421.32Effluent 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) The following limitations establish the quantity or quality of pollutants or pollutant properties, which may be discharged by a point source subject to the provisions of this subpart and which uses water for metal cooling, after application of the best practicable control technology currently available: There shall be no discharge of process wastewater pollutants to navigable waters.
(b) The following limitations establish the quantity or quality of pollutants or pollutant properties which may be discharged by a point source subject to the provisions of this subpart and which uses aluminum fluoride in its magnesium removal process (“demagging process”), after application of the best practicable control technology currently available: There shall be no discharge of process wastewater pollutants to navigable waters.
(c) The following limitations establish the quantity or quality of pollutants or pollutant properties controlled by this section, which may be discharged by a point source subject to the provisions of this subpart and which uses chlorine in its magnesium removal process, after application of the best practicable control technology currently available:
Effluent LimitationsEffluent characteristicAverage of daily values for 30 consecutive days shall not exceed—Metric units (kilograms per 1,000 kg magnesium removed)TSS175COD6.5pH(1)1 Within the range of 7.5 to 9.0.
(d) The following limitations establish the quantity or quality of pollutants or pollutant properties which may be discharged by a point source subject to the provisions of this subpart and which processes residues by wet methods, after application of the best practical control technology currently available:
Effluent LimitationsEffluent characteristicAverage of daily values for 30 consecutive days shall not exceed—Metric units (kilograms per 1,000 kg of product)TSS1.5Fluoride0.4Ammonia (as N)0.01Aluminum1.0Copper0.003COD1.0pH(1)1 Within the range of 7.5 to 9.0.§ 421.33Effluent 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 C—Scrap Drying Wet Air Pollution Control.
BAT Effluent LimitationsPollutant or pollutant propertyMaximum for any 1 dayMaximum for monthly averagemg/kg (pound's per million pounds) of aluminum scrap driedLead.000.000Zinc.000.000Aluminum.000.000Ammonia (as N).000.000
(b) Subpart C—Scrap Screening and Milling.
BAT Effluent LimitationsPollutant or pollutant propertyMaximum for any 1 dayMaximum for monthly averagemg/kg (pound's per million pounds) of aluminum scrap screened and milledLead.000.000Zinc.000.000Aluminum.000.000Ammonia (as N).000.000
(c) Subpart C—Dross Washing.
BAT Effluent LimitationsPollutant or pollutant propertyMaximum for any 1 dayMaximum for monthly averagemg/kg (pound's per million pounds) of dross washedLead3.0431.413Zinc11.0904.565Aluminum66.41029.450Ammonia (as N)1,449.000636.900
(d) Subpart C—Demagging Wet Air Pollution Control.
BAT Effluent LimitationsPollutant or pollutant propertyMaximum for any 1 dayMaximum for monthly averagemg/kg (lb/million lbs) of aluminum demaggedLead0.2160.100Zinc0.7860.324Aluminum4.7112.090Ammonia (as N)102.80045.180
(e) Subpart C—Delacquering Wet Air Pollution Control.
BAT Effluent LimitationsPollutant or pollutant propertyMaximum for any 1 dayMaximum for monthly averagemg/kg (pound's per million pounds) of aluminum delacqueredLead0.0930.043Zinc0.3400.140Aluminum2.0350.903Ammonia (as N)44.38919.514Total phenolics (4-AAP method) 10.0041 At the source.
BAT Effluent LimitationsPollutant or pollutant propertyMaximum for any 1 dayMaximum for monthly averagemg/kg (pounds per million pounds) of aluminum castLead.372.173Zinc1.356.558Aluminum8.1203.602Ammonia (as N)177.20077.880
(g) Subpart C—Ingot Conveyor Casting Contact Cooling (When Chlorine Demagging Wet Air Pollution Control is Not Practiced On-Site).
BAT Effluent LimitationsPollutant or pollutant propertyMaximum for any 1 dayMaximum for monthly averagemg/kg (lb/million lbs) of aluminum castLead0.0190.009Zinc0.0680.028Aluminum0.4090.182Ammonia (as N)8.9313.926
(h) Subpart C—Ingot Conveyor Casting Contact Cooling (When Chloride Demagging Wet Air Pollution Control is Practiced On Site).
BAT Effluent LimitationsPollutant or pollutant propertyMaximum for any 1 dayMaximum for monthly averagemg/kg (pounds per million pounds) of aluminum castLead.000.000Zinc.000.000Aluminum.000.000Ammonia (as N).000.000
(i) Subpart C—Stationary Casting Contact Cooling.
BAT Effluent LimitationsPollutant or pollutant propertyMaximum for any 1 dayMaximum for monthly averagemg/kg (pounds per million pounds) of aluminum castLead.000.000Zinc.000.000Aluminum.000.000Ammonia (as N).000.000
(j) Subpart C—Shot Casting Contact Cooling.
BAT Effluent LimitationsPollutant or pollutant propertyMaximum for any 1 dayMaximum for monthly averagemg/kg (pounds per million pounds) of aluminum castLead.000.000Zinc.000.000Aluminum.000.000Ammonia (as N).000.000[49 FR 8796, Mar. 8, 1984; 49 FR 26739, June 29, 1984, as amended at 49 FR 29794, July 24, 1984; 52 FR 25559, July 7, 1987]§ 421.34Standards of performance for new sources.
Any new source subject to this subpart shall achieve the following new source performance standards:
(a) Subpart C—Scrap Drying Wet Air Pollution Control.
NSPSPollutant or pollutant propertyMaximum for any 1 dayMaximum for monthly average.mg/kg (pounds per million pounds) of aluminum scrap driedLead.000.000Zinc.000.000Aluminum.000.000Ammonia (as N).000.000Total suspended solids.000.000Oil and grease.000.000pH(1)(1)1 Within the range of 7.0 to 10.0 at all times
(b) Subpart C—Scrap Screening and Milling.
NSPSPollutant or pollutant propertyMaximum for any 1 dayMaximum for monthly averagemg/kg (pounds per million pounds) of aluminum scrap screened and milledLead.000.000Zinc.000.000Aluminum.000.000Ammonia (as N).000.000Total suspended solids.000.000Oil and grease.000.000pH(1)(1)1 Within the range of 7.0 to 10.0 at all times.
(c) Subpart C—Dross Washing.
NSPSPollutant or pollutant propertyMaximum for any 1 dayMaximum for monthly averagemg/kg (pounds per million pounds) of dross washedLead.000.000Zinc.000.000Aluminum.000.000Ammonia (as N).000.000Total suspended solids.000.000Oil and grease.000.000pH(1)(1)1 Within the range of 7.0 to 10.0 at all times.
(d) Subpart C—Demagging Wet Air Pollution Control.
NSPSPollutant or pollutant propertyMaximum for any 1 dayMaximum for monthly averagemg/kg (lb/million lbs) of aluminum demaggedLead0.2160.100Zinc0.7860.324Aluminum4.7112.090Ammonia (as N)102.80045.180Total suspended solids11.5709.252Oil and grease7.7107.710pH(1)(1)1 Within the range of 7.0 to 10.0 at all times.
(e) Subpart C—Delacquering Wet Air Pollution Control.
NSPSPollutant or pollutant propertyMaximum for any 1 dayMaximum for monthly averagemg/kg (pounds per million pounds) of aluminum delacqueredLead0.0930.043Zinc0.3400.140Aluminum2.0350.903Ammonia (as N)44.38919.514Total phenolics (4-AAP method) 10.004Total suspended solids4.9953.996Oil and grease3.3303.330pH(2)(2)1 At the source.2 Within the range of 7.0 to 10.0 at all times.
NSPSPollutant or pollutant propertyMaximum for any 1 dayMaximum for monthly averagemg/kg (pounds per million pounds) of aluminum castLead.372.173Zinc1.356.558Aluminum8.1203.602Ammonia (as N)177.20077.880Total suspended solids19.94015.950Oil and grease13.29013.290pH(1)(1)1 Within the range of 7.0 to 10.0 at all times.
(g) Subpart C—Ingot Conveyor Casting Contact Cooling (When Chlorine Demagging Wet Air Pollution Control is Not Practiced On-Site).
NSPSPollutant or pollutant propertyMaximum for any 1 dayMaximum for monthly averagemg/kg (lb/million lbs) of aluminum castLead0.0190.009Zinc0.0680.028Aluminum0.4090.182Ammonia (as N)8.9313.926Total suspended solids1.0050.804Oil and grease0.6700.670pH(1)(1)1 Within the range of 7.0 to 10.0 at all times.
(h) Subpart C—Ingot Conveyor Casting Contact Cooling (When Chlorine Demagging Wet Air Pollution Control is Practiced On Site).
NSPSPollutant or pollutant propertyMaximum for any 1 dayMaximum for monthly averagemg/kg (pounds per million pounds) of aluminum castLead.000.000Zinc.000.000Aluminum.000.000Ammonia (as N).000.000Total suspended solids.000.000Oil and grease.000.000pH(1)(1)1Within the range of 7.0 to 10.0 at all times.
(i) Subpart C—Stationary Casting Contact Cooling.
NSPSPollutant or pollutant propertyMaximum for any 1 dayMaximum for monthly averagemg/kg (pounds per million pounds) of aluminum castLead.000.000Zinc.000.000Aluminum.000.000Ammonia (as N).000.000Total suspended solids.000.000Oil and grease.000.000pH(1)(1)1Within the range of 7.0 to 10.0 at all times.
(j) Subpart C—Shot Casting Contact Cooling.
NSPSPollutant or pollutant propertyMaximum for any 1 dayMaximum for monthly averagemg/kg (pounds per million pounds) of aluminum castLead.000.000Zinc.000.000Aluminum.000.000Ammonia (as N).000.000Total suspended solids.000.000Oil and grease.000.000pH(1)(1)1 Within the range of 7.0 to 10.0 at all times.[49 FR 8796, Mar. 8, 1984, as amended at 49 FR 29794, July 24, 1984; 52 FR 25559, July 7, 1987]§ 421.35Pretreatment 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 aluminum process wastewater introduced into a POTW shall not exceed the following values:
(a) Subpart C—Scrap Drying Wet Air Pollution Control.
PSESPollutant or pollutant propertyMaximum for any 1 dayMaximum for monthly averagemg/kg (pounds per million pounds) of aluminum scrap driedLead.000.000Zinc.000.000Ammonia (as N).000.000
(b) Subpart C—Scrap Screening and Milling.
PSESPollutant or pollutant propertyMaximum for any 1 dayMaximum for monthly averagemg/kg (pounds per million pounds) of aluminum scrap screened and milledLead.000.000Zinc.000.000Ammonia (as N).000.000
(c) Subpart C—Dross Washing.
PSESPollutant or pollutant propertyMaximum for any 1 dayMaximum for monthly averagemg/kg (pounds per million pounds) of dross washedLead3.0431.413Zinc11.0904.565Ammonia (as N)1,449.000636.000
(d) Subpart C—Demagging Wet Air Pollution Control.
PSESPollutant or pollutant propertyMaximum for any 1 dayMaximum for monthly averagemg/kg (lb/million lbs) of aluminum demaggedLead0.2160.100Zinc0.7860.324Amomonia (as N)102.80045.180
(e) Subpart C—Delacquering Wet Air Pollution Control.
PSESPollutant or pollutant propertyMaximum for any 1 dayMaximum for monthly averagemg/kg (pounds per million pounds) of aluminum delacqueredLead0.0930.043Zinc0.3400.140Ammonia (as N)44.38919.514Total phenolics (4-AAP) method) 10.0041 At the source.
PSESPollutant or pollutant propertyMaximum for any 1 dayMaximum for monthly averagemg/kg (pounds per million pounds) of aluminum castLead.372.173Zinc1.356.558Ammonia (as N)177.20077.800
(g) Subpart C—Ingot Conveyor Casting Contact Cooling (When Chlorine Demagging Wet Air Pollution Control is Not Practiced On-Site).
PSESPollutant or pollutant propertyMaximum for any 1 dayMaximum for monthly averagemg/kg (lb/million lbs) of aluminum castLead0.0190.009Zinc0.0680.028Amomonia (as N)8.9313.926
(h) Subpart C—Ingot Conveyor Casting Contact Cooling. (When Chlorine Demagging Wet Air Pollution Control is Practiced On Site.)
PSESPollutant or pollutant propertyMaximum for any 1 dayMaximum for monthly averagemg/kg (pounds per million pounds) of aluminum castLead.000.000Zinc.000.000Ammonia (as N).000.000
(i) Subpart C—Stationary Casting Contact Cooling.
PSESPollutant or pollutant propertyMaximum for any 1 dayMaximum for monthly averagemg/kg (pounds per million pounds) of aluminum castLead.000.000Zinc.000.000Ammonia (as N).000.000
(j) Subpart C—Shot Casting Contact Cooling.
PSESPollutant or pollutant propertyMaximum for any 1 dayMaximum for monthly averagemg/kg (pounds per million pounds) of aluminum castLead.000.000Zinc.000.000Ammonia (as N).000.000[49 FR 8796, Mar. 8, 1984, as amended at 49 FR 29794, July 24, 1984; 52 FR 25560, July 7, 1987]§ 421.36Pretreatment 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 introduced in secondary aluminum process wastewater into a POTW shall not exceed the following values:
(a) Subpart C—Scrap Drying Wet Air Pollution Control.
PSNSPollutant or pollutant propertyMaximum for any 1 dayMaximum for monthly averagemg/kg (pounds per million pounds) of aluminum scrap dried
Lead.000.000Zinc.000.000Ammonia (as N).000.000
(b) Subpart C—Scrap Screening and Milling.
PSNSPollutant or pollutant propertyMaximum for any 1 dayMaximum for monthly averagemg/kg (pounds per million pounds) of aluminum scrap screened and milled
Lead.000.000Zinc.000.000Ammonia (as N).000.000
(c) Subpart C—Dross Washing.
PSNSPollutant or pollutant propertyMaximum for any 1 dayMaximum for monthly averagemg/kg (pounds per million pounds) of dross washed
Lead.000.000Zinc.000.000Ammonia (as N).000.000
(d) Subpart C—Demagging Wet Air Pollution Control.
PSNSPollutant or pollutant propertyMaximum for any 1 dayMaximum for monthly averagemg/kg (lb/million lbs) of aluminum demaggedLead0.2160.100Zinc0.7860.324Amomonia (as N)102.80045.180
(e) Subpart C—Delacquering Wet Air Pollution Control
PSNSPollutant or pollutant propertyMaximum for any 1 dayMaximum for monthly averagemg/kg (pounds per million pounds) of aluminum delacquered
Lead0.0930.043Zinc0.3400.140Ammonia (as N)44.38919.514Total phenolics (4-AAP method) 10.0041 At the source.
PSNSPollutant or pollutant propertyMaximum for any 1 dayMaximum for monthly averagemg/kg (pounds per million pounds) of aluminum cast
Lead.372.173Zinc1.356.558Ammonia (as N)177.20077.880
(g) Subpart C—Ingot Conveyor Casting Control Cooling (When Chlorine Demagging Wet Air Pollution Control is Not Practiced On-Site).
PSNSPollutant or pollutant propertyMaximum for any 1 dayMaximum for monthly averagemg/kg (lb/million lbs) of aluminum castLead0.0190.009Zinc0.0680.028Amomonia (as N)8.9313.926
(h) Subpart C—Ingot Conveyor Casting Contact Cooling (When Chlorine Demagging Wet Air Pollution Control Is Practiced on Site).
PSNSPollutant or pollutant propertyMaximum for any 1 dayMaximum for monthly averagemg/kg (pounds per million pounds) of aluminum castLead.000.000Zinc.000.000Ammonia (as N).000.000
(i) Subpart C—Stationary Casting Contact Cooling.
PSNSPollutant or pollutant propertyMaximum for any 1 dayMaximum for monthly averagemg/kg (pounds per million pounds) of aluminum castLead.000.000Zinc.000.000Ammonia (as N).000.000
(j) Subpart C—Shot Casting Contact Cooling.
PSNSPollutant or pollutant propertyMaximum for any 1 dayMaximum for monthly averagemg/kg (pounds per million pounds) of aluminum castLead.000.000Zinc.000.000Ammonia (as N).000.000[49 FR 8796, Mar. 8, 1984, as amended at 49 FR 29794, July 24, 1984; 52 FR 25560, July 7, 1987]§ 421.37[Reserved]