Loading (50 kb)...'
(continued)
any 1 day average
------------------------------------------------------------------------
mg/kg
(pound per
million
pounds) of
aluminum
produced
from
electrolyti
c reduction
-------------------------
Benzo(a)pyrene................................ .000 ...........
Antimony...................................... .000 .000
Nickel........................................ .000 .000
Aluminum...................................... .000 .000
Fluoride...................................... .000 .000
Oil and grease................................ .000 .000
Total suspended solids........................ .000 .000
pH............................................ (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.0 to 10.0 at all times.
(g) Subpart B—Potroom Wet Air Pollution Control.
NSPS
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/kg
(pound per
million
pounds) of
aluminum
produced
from
electrolyti
c reduction
-------------------------
Benzo(a)pyrene................................ .000 ...........
Antimony...................................... .000 .000
Nickel........................................ .000 .000
Aluminum...................................... .000 .000
Fluoride...................................... .000 .000
Oil and grease................................ .000 .000
Total suspended solids........................ .000 .000
pH............................................ (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.0 to 10.0 at all times.
(h) Subpart B—Potline SO2 Emissions Wet Air Pollution Control.
NSPS
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/kg
(pound per
million
pounds)
aluminum
produced
from
electrolyti
c reduction
-------------------------
Benzo(a)pyrene................................ 0.045 0.021
Antimony...................................... 2.588 1.153
Nickel........................................ .738 .496
Aluminum...................................... 8.194 3.634
Fluoride...................................... 79.790 35.400
Oil and grease................................ 13.410 13.410
Total suspended solids........................ 20.120 16.090
pH............................................ (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.0 to 10.0 at all times.
(i) Subpart B—Degassing Wet Air Pollution Control.
NSPS
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/kg
(pound per
million
pounds) of
aluminum
produced
from
electrolyti
c reduction
-------------------------
Benzo(a)pyrene................................ .000 ...........
Antimony...................................... .000 .000
Nickel........................................ .000 .000
Aluminum...................................... .000 .000
Fluoride...................................... .000 .000
Oil and grease................................ .000 .000
Total suspended solids........................ .000 .000
pH............................................ (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.0 to 10.0 at all times.
(j) Subpart B—Pot Repair and Pot Soaking.
NSPS
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/kg
(pound per
million
pounds) of
aluminum
produced
from
electrolyti
c reduction
-------------------------
Benzo(a)pyrene................................ .000 ...........
Antimony...................................... .000 .000
Nickel........................................ .000 .000
Aluminum...................................... .000 .000
Fluoride...................................... .000 .000
Oil and grease................................ .000 .000
Total suspended solids........................ .000 .000
pH............................................ (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.0 to 10.0 at all times.
(k) Subpart B—Direct Chill Casting Contact Cooling.
NSPS
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/kg
(pound per
million
pounds) of
aluminum
product
from direct
chill
casting
-------------------------
Benzo(a)pyrene................................ (\1\) (\1\)
Antimony...................................... 2.565 1.143
Nickel........................................ .731 .492
Aluminum...................................... 8.120 3.602
Fluoride...................................... 79.080 35.090
Oil and grease................................ 13.290 13.290
Total suspended solids........................ 19.940 15.950
pH............................................ (\2\) (\2\)
------------------------------------------------------------------------
\1\ There shall be no discharge allowance for this pollutant.
\2\ The pH shall be maintained within the range of 7.0 to 10.0 at all
times except for those situations when this waste is discharged
separately and without commingling with any other waste-water in which
case the pH shall be within the range of 6.0 to 10.0 at all times.
(l) Subpart B—Continuous Rod Casting Contact Cooling.
NSPS
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/kg
(pound per
million
pounds) of
aluminum
product
from rod
casting
-------------------------
Benzo(a)pyrene................................ (\1\) (\1\)
Antimony...................................... .201 .089
Nickel........................................ .057 .038
Aluminum...................................... .636 .282
Fluoride...................................... 6.188 2.746
Oil and grease................................ 1.040 1.040
Total suspended solids........................ 1.560 1.248
pH............................................ (\2\) (\2\)
------------------------------------------------------------------------
\1\ There shall be no discharge allowance for this pollutant.
\2\ Within the range of 7.0 to 10.0 at all times.
(m) Subpart B—Stationary Casting or Shot Casting Contact Cooling.
NSPS
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/kg
(pounds per
million
pounds) of
aluminum
product
from
stationary
casting or
shot
casting
-------------------------
Benzo(a)pyrene................................ .000 ...........
Antimony...................................... .000 .000
Nickel........................................ .000 .000
Aluminum...................................... .000 .000
Fluoride...................................... .000 .000
Oil and grease................................ .000 .000
Total suspended solids........................ .000 .000
pH............................................ (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.0 to 10.0 at all times.
[49 FR 8792, Mar. 8, 1984; 49 FR 26739, June 29, 1984, as amended at 52 FR 25558, July 7, 1987]
§ 421.25 [Reserved]
top
§ 421.26 Pretreatment standards for new sources.
top
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 primary aluminum process wastewater introduced into a POTW shall not exceed the following values:
(a) Subpart B—Anode and Cathode Paste Plant Wet Air Pollution Control.
PSNS
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/kg
(pounds per
million
pounds) of
paste
produced
-------------------------
Benzo(a)pyrene................................ .000 ...........
Nickel........................................ .000 .000
Fluoride...................................... .000 .000
------------------------------------------------------------------------
(b) Subpart B—Anode Contact Cooling and Briquette Quenching.
PSNS
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/kg
(pounds per
million
pounds) of
anodes cast
-------------------------
Benzo(a)pyrene................................ 0.007 0.003
Nickel........................................ .115 .077
Fluoride...................................... 12.440 5.518
------------------------------------------------------------------------
(c) Subpart B—Anode Bake Plant Wet Air Pollution Control.
PSNS
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/kg
(pounds per
million
pounds) of
anodes
baked
-------------------------
Benzo(a)pyrene................................ .000 ...........
Nickel........................................ .000 .000
Fluoride...................................... .000 .000
------------------------------------------------------------------------
(d) Subpart B—Cathode Reprocessing (Operated With Dry Potline Scrubbing and Not Commingled With Other Process or Nonprocess Waters).
PSNS
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/kg
(pounds per
million
pounds) of
cryolite
recovered
-------------------------
Benzo(a)pyrene................................ 1.181 0.547
Cyanide....................................... 157.600 70.060
Nickel........................................ 80.570 35.030
Fluoride...................................... 29,430.000 13,310.000
------------------------------------------------------------------------
(e) Subpart B—Cathode Reprocessing (Operated With Dry Potline Scrubbing and Commingled With Other Process or Nonprocess Waters).
PSNS
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/kg
(pounds per
million
pounds) of
cryolite
recovered
-------------------------
Benzo(a)pyrene................................ 1.181 0.547
Cyanide....................................... 157.600 70.060
Nickel........................................ 19.270 12.960
Fluoride...................................... 2,084.000 924.800
------------------------------------------------------------------------
(f) Subpart B—Potline Wet Air Pollution Control.
PSNS
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/kg
(pounds per
million
pounds) of
aluminum
produced
from
electrolyti
c reduction
-------------------------
Benzo(a)pyrene................................ .000 ...........
Nickel........................................ .000 .000
Fluoride...................................... .000 .000
------------------------------------------------------------------------
(g) Subpart B—Potroom Wet Air Pollution Control.
PSNS
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/kg
(pounds per
million
pounds) of
aluminum
produced
from
electrolyti
c reduction
-------------------------
Benzo(a)pyrene................................ .000 ...........
Nickel........................................ .000 .000
Fluoride...................................... .000 .000
------------------------------------------------------------------------
(h) Subpart B—Potline SO2 Emissions Wet Air Pollution Control.
PSNS
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/kg
(pounds per
million
pounds) of
aluminum
produced
from
electrolyti
c reduction
-------------------------
Benzo(a)pyrene................................ 0.045 0.021
Nickel........................................ .738 .496
Fluoride...................................... 79.790 35.400
------------------------------------------------------------------------
(i) Subpart B—Degassing Wet Air Pollution Control.
PSNS
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/kg
(pounds per
million
pounds) of
aluminum
produced
from
electrolyti
c reduction
-------------------------
Benzo(a)pyrene................................ .000 ...........
Nickel........................................ .000 .000
Fluoride...................................... .000 .000
------------------------------------------------------------------------
(j) Subpart B—Pot Repair and Pot Soaking.
PSNS
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/kg
(pounds per
million
pounds) of
aluminum
produced
from
electrolyti
c reduction
-------------------------
Benzo(a)pyrene................................ .000 ...........
Nickel........................................ .000 .000
Fluoride...................................... .000 .000
------------------------------------------------------------------------
(k) Subpart B—Direct Chill Casting Contact Cooling.
PSNS
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/kg
(pounds per
million
pounds) of
aluminum
product
from direct
chill
casting
-------------------------
Benzo(a)pyrene................................ (\1\) (\1\)
Nickel........................................ .731 .492
Fluoride...................................... 79.080 35.090
------------------------------------------------------------------------
\1\ There shall be no discharge allowance for this pollutant.
(l) Subpart B—Continuous Rod Casting Contact Cooling.
PSNS
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/kg
(pound per
million
pounds) of
aluminum
product
from rod
casting
-------------------------
Benzo(a)pyrene................................ (\1\) (\1\)
Nickel........................................ .057 .038
Fluoride...................................... 6.188 2.746
------------------------------------------------------------------------
\1\ There shall be no discharge allowance for this pollutant.
(m) Subpart B—Stationary Casting or Shot Casting Contact Cooling.
PSNS
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/kg
(pound per
million
pounds) of
aluminum
product
from
stationary
casting or
shot
casting
-------------------------
Benzo(a)pyrene................................ .000 ...........
Nickel........................................ .000 .000
Fluoride...................................... .000 .000
------------------------------------------------------------------------
[49 FR 8792, Mar. 8, 1984; 49 FR 26739, June 29, 1984, as amended at 52 FR 25559, July 7, 1987]
§ 421.27 [Reserved]
top
Subpart C—Secondary Aluminum Smelting Subcategory
top
Source: 49 FR 8796, Mar. 8, 1984, unless otherwise noted.
§ 421.30 Applicability: Description of the secondary aluminum smelting subcategory.
top
The provisions of this subpart are applicable to discharges resulting from the recovery, processing, and remelting of aluminum scrap to produce metallic aluminum alloys.
§ 421.31 Specialized definitions.
top
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.
§ 421.32 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
top
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 Limitations
------------------------------------------------------------------------
Average of daily values for
Effluent characteristic 30 consecutive days shall
not exceed_
------------------------------------------------------------------------
Metric units (kilograms per
1,000 kg magnesium removed)
-----------------------------
TSS....................................... 175
COD....................................... 6.5
pH........................................ (\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 Limitations
------------------------------------------------------------------------
Average of daily values
Effluent characteristic for 30 consecutive days
shall not exceed_
------------------------------------------------------------------------
Metric units (kilograms
per 1,000 kg of
product)
------------------------
TSS............................................ 1.5
Fluoride....................................... 0.4
Ammonia (as N)................................. 0.01
Aluminum....................................... 1.0
Copper......................................... 0.003
COD............................................ 1.0
pH............................................. (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 9.0.
§ 421.33 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
top
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 Limitations
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/kg
(pound's
per million
pounds) of
aluminum
scrap dried
-------------------------
Lead.......................................... .000 .000
Zinc.......................................... .000 .000
Aluminum...................................... .000 .000
Ammonia (as N)................................ .000 .000
------------------------------------------------------------------------
(b) Subpart C—Scrap Screening and Milling.
BAT Effluent Limitations
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/kg
(pound's
per million
pounds) of
aluminum
scrap
screened
and milled
-------------------------
Lead.......................................... .000 .000
Zinc.......................................... .000 .000
Aluminum...................................... .000 .000
Ammonia (as N)................................ .000 .000
------------------------------------------------------------------------
(c) Subpart C—Dross Washing.
BAT Effluent Limitations
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/kg
(pound's
per million
pounds) of
dross
washed
-------------------------
Lead.......................................... 3.043 1.413
Zinc.......................................... 11.090 4.565
Aluminum...................................... 66.410 29.450
Ammonia (as N)................................ 1,449.000 636.900
------------------------------------------------------------------------
(d) Subpart C—Demagging Wet Air Pollution Control.
BAT Effluent Limitations
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/kg (lb/
million
lbs) of
aluminum
demagged
-------------------------
Lead.......................................... 0.216 0.100
Zinc.......................................... 0.786 0.324
Aluminum...................................... 4.711 2.090
Ammonia (as N)................................ 102.800 45.180
------------------------------------------------------------------------
(e) Subpart C—Delacquering Wet Air Pollution Control.
BAT Effluent Limitations
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/kg
(pound's
per million
pounds) of
aluminum
delacquered
-------------------------
Lead.......................................... 0.093 0.043
Zinc.......................................... 0.340 0.140
Aluminum...................................... 2.035 0.903
Ammonia (as N)................................ 44.389 19.514
Total phenolics (4-AAP method) \1\............ 0.004 ...........
------------------------------------------------------------------------
\1\ At the source.
(f) Subpart C—Direct Chill Casting Contact Cooling.
BAT Effluent Limitations
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/kg
(pounds per
million
pounds) of
aluminum
cast
-------------------------
Lead.......................................... .372 .173
Zinc.......................................... 1.356 .558
Aluminum...................................... 8.120 3.602
Ammonia (as N)................................ 177.200 77.880
------------------------------------------------------------------------
(g) Subpart C—Ingot Conveyor Casting Contact Cooling (When Chlorine Demagging Wet Air Pollution Control is Not Practiced On-Site).
BAT Effluent Limitations
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/kg (lb/
million
lbs) of
aluminum
cast
-------------------------
Lead.......................................... 0.019 0.009
Zinc.......................................... 0.068 0.028
Aluminum...................................... 0.409 0.182
Ammonia (as N)................................ 8.931 3.926
------------------------------------------------------------------------
(h) Subpart C—Ingot Conveyor Casting Contact Cooling (When Chloride Demagging Wet Air Pollution Control is Practiced On Site).
BAT Effluent Limitations
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/kg
(pounds per
million
pounds) of
aluminum
cast
-------------------------
Lead.......................................... .000 .000
Zinc.......................................... .000 .000
Aluminum...................................... .000 .000
Ammonia (as N)................................ .000 .000
------------------------------------------------------------------------
(i) Subpart C—Stationary Casting Contact Cooling.
BAT Effluent Limitations
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/kg
(pounds per
million
pounds) of
aluminum
cast
-------------------------
Lead.......................................... .000 .000
Zinc.......................................... .000 .000
Aluminum...................................... .000 .000
Ammonia (as N)................................ .000 .000
------------------------------------------------------------------------
(j) Subpart C—Shot Casting Contact Cooling.
BAT Effluent Limitations
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/kg
(pounds per (continued)