421.115—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 primary columbium-tantalum process wastewater introduced into a POTW shall not exceed the following values:
(a)
Subpart K—Concentrate Digestion Wet Air Pollution Control.
PSES
|
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.
PSES
|
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 |
Code of Federal Regulations
514
|
(c)
Subpart K—Solvent Extraction Wet Air Pollution Control.
PSES
|
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.
PSES
|
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.
PSES
|
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.
PSES
|
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.
PSES
|
mg/kg (pounds per million pounds) of columbium-tantalum oxide dried |
| 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.
PSES
|
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.
PSES
|
mg/kg (pounds per million pounds) of tantalum salt reduced |
| Lead |
.572 |
.266 |
| Zinc |
2.084 |
.858 |
| Ammonia (as N) |
272.400 |
119.700 |
| Fluoride |
71.510 |
40.860 |
(j)
Subpart K—Tantalum Powder Wash.
PSES
|
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.
PSNS
|
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]