421.113—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 K—Concentrate Digestion Wet Air Pollution Control.
BAT Effluent Limitations
|
mg/kg (pounds per million pounds) of concentrate digested |
| Lead |
.174 |
.081 |
| Zinc |
.635 |
.261 |
| Ammonia (as N) |
82.910 |
36.450 |
| Fluoride |
21.770 |
12.440 |
(b)
Subpart K—Solvent Extraction Raffinate.
BAT Effluent Limitations
|
mg/Kg (pounds per million pounds) of concentrate digested |
| Lead |
2.592 |
1.203 |
| Zinc |
9.442 |
3.888 |
| Ammonia (as N) |
1,233.000 |
542.5000 |
| Fluoride |
324.000 |
185.100 |
(c)
Subpart K—Solvent Extraction Wet Air Pollution Control.
BAT Effluent Limitations
|
mg/kg (pounds per million pounds) of concentrate digested |
| Lead |
.069 |
.032 |
| Zinc |
.251 |
.103 |
| Ammonia (as N) |
32.790 |
14.420 |
| Fluoride |
8.610 |
4.920 |
(d)
Subpart K—Precipitation and Filtration.
BAT Effluent Limitations
|
mg/kg (pounds per million pounds) of concentrate digested |
| Lead |
3.833 |
1.780 |
| Zinc |
13.960 |
5.750 |
| Ammonia (as N) |
1,825.000 |
802.200 |
| Fluoride |
479.100 |
273.800 |
(e)
Subpart K—Precipitation and Filtration Wet Air Pollution Control.
BAT Effluent Limitations
|
mg/kg (pounds per million pounds) of concentrate digested |
| Lead |
1.778 |
.826 |
| Zinc |
6.478 |
2.668 |
| Ammonia (as N) |
846.600 |
372.200 |
| Fluoride |
222.300 |
127.000 |
(f)
Subpart K—Tantalum Salt Drying.
BAT Effluent Limitations
|
mg/kg (pounds per million pounds) of tantalum salt dried |
| Lead |
16.950 |
7.871 |
| Zinc |
61.750 |
25.430 |
| Ammonia (as N) |
8,070.000 |
3,548.000 |
| Fluoride |
2,119.000 |
1,211.000 |
(g)
Subpart K—Oxides Calcining Wet Air Pollution Control.
BAT Effluent Limitations
|
mg/kg (pounds per million pounds) of columbium-tantalum oxide |
| Lead |
1.076 |
.500 |
| Zinc |
3.919 |
1.614 |
| Ammonia (as N) |
512.200 |
225.200 |
| Fluoride |
134.500 |
76.840 |
(h)
Subpart K—Reduction of Tantalum Salt to Metal.
BAT Effluent Limitations
|
mg/kg (pounds per million pounds) of tantalum salt reduced |
| Lead |
46.500 |
21.590 |
| Zinc |
169.400 |
69.750 |
| Ammonia (as N) |
22,140.000 |
9,732.000 |
| Fluoride |
5,813.000 |
3,322.000 |
(i)
Subpart K—Reduction of Tantalum Salt to Metal Wet Air Pollution Control.
BAT Effluent Limitations
|
mg/kg (pounds per million pounds) of tantalum salt reduced |
| Lead |
.572 |
.266 |
| Zinc |
2.084 |
.858 |
| Fluoride |
71.510 |
40.860 |
(j)
Subpart K—Tantalum Powder Wash.
BAT Effluent Limitations
|
mg/kg (pounds per million pounds) of tantalum powder washed |
| Lead |
5.721 |
2.656 |
| Zinc |
20.840 |
8.582 |
| Ammonia (as N) |
2,724.000 |
1,198.000 |
| Fluoride |
715.200 |
408.700 |
(k)
Subpart K—Consolidation and Casting Contact Cooling.
BAT Effluent Limitations
|
mg/kg (pounds per million pounds) of columbium or tantalum cast or consolidated |
| Lead |
.000 |
.000 |
| Zinc |
.000 |
.000 |
| Ammonia (as N) |
.000 |
.000 |
| Fluoride |
.000 |
.000 |
[49 FR 8817, Mar. 8, 1984, as amended at 50 FR 12253, Mar. 28, 1985]