421.33—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)
Subpart C—Scrap Drying Wet Air Pollution Control.
BAT Effluent Limitations
|
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
|
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
|
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
|
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
|
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
|
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
|
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
|
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
|
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
|
mg/kg (pounds per million pounds) of aluminum cast |
| Lead |
.000 |
.000 |
| Zinc |
.000 |
.000 |
| Aluminum |
.000 |
.000 |
| Ammonia (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]