421.124—Standards of performance for new sources.
Any new source subject to this subpart shall achieve the following new source performance standards:
(a)
Subpart L—Film Stripping.
NSPS
|
mg/troy ounce of silver from film stripping |
| Copper |
64.450 |
30.720 |
| Zinc |
51.360 |
21.150 |
| Ammonia (as N) |
6,712.000 |
2,951.000 |
| Total suspended solids |
755.300 |
604.200 |
| pH |
(1) |
(1) |
|
1 Within the range of 7.5 to 10.0 at all times. |
(b)
Subpart L—Film Stripping Wet Air Pollution Control and Precipitation and Filtration of Film Stripping Solutions Wet Air Pollution Control.
NSPS
|
mg/troy ounce of silver from precipitation and filtration of film stripping solutions |
| Copper |
1.242 |
.592 |
| Zinc |
.990 |
.408 |
| Ammonia (as N) |
129.300 |
56.840 |
| Total suspended solids |
14.550 |
11.640 |
| pH |
(1) |
(1) |
|
1 Within the range of 7.5 to 10.0 at all times. |
(c)
Subpart L—Precipitation and Filtration of Film Stripping Solutions.
NSPS
|
mg/troy ounce of silver precipitated |
| Copper |
73.690 |
35.120 |
| Zinc |
58.720 |
24.180 |
| Ammonia (as N) |
7,674.000 |
3,374.000 |
| Total suspended solids |
863.600 |
690.900 |
| pH |
(1) |
(1) |
|
1 Within the range of 7.5 to 10.0 at all times. |
(d)
Subpart L—Precipitation and Filtration of Photographic Solutions.
NSPS
|
mg/troy ounce of silver precipitated |
| Copper |
34.048 |
16.226 |
| Zinc |
27.132 |
11.172 |
| Ammonia (as N) |
3,545.000 |
1,559.000 |
| Total suspended solids |
399.000 |
319.200 |
| pH |
(1) |
(1) |
|
1 Within the range of 7.5 to 10.0 at all times. |
(e)
Subpart L—Precipitation and Filtration of Photographic Solutions Wet Air Pollution Control.
NSPS
|
mg/troy ounce of silver from precipitation and filtration of photographic solutions |
| Copper |
15.540 |
7.406 |
| Zinc |
12.380 |
5.099 |
| Ammonia (as N) |
1,618.000 |
711.400 |
| Total suspended solids |
182.100 |
145.700 |
| pH |
(1) |
(1) |
|
1 Within the range of 7.5 to 10.0 at all times. |
(f)
Subpart L—Electrolytic Refining.
NSPS
|
mg/troy ounce of silver from electrolytic refining |
| Copper |
.973 |
.464 |
| Zinc |
.775 |
.319 |
| Ammonia (as N) |
101.300 |
44.540 |
| Total suspended solids |
11.400 |
9.120 |
| pH |
(1) |
(1) |
|
1 Within the range of 7.5 to 10.0 at all times. |
(g)
Subpart L—Furnace Wet Air Pollution Control.
NSPS
|
mg/troy ounce of silver roasted, smelted, or dried |
| Copper |
.000 |
.000 |
| Zinc |
.000 |
.000 |
| Ammonia (as N) |
.000 |
.000 |
| Total suspended solids |
.000 |
.000 |
| pH |
(1) |
(1) |
|
1 Within the range of 7.5 to 10.0 at all times. |
NSPS
|
mg/troy ounce of silver produced from leaching |
| Copper |
.110 |
.053 |
| Zinc |
.088 |
.036 |
| Ammonia (as N) |
11.470 |
5.040 |
| Total suspended solids |
1.290 |
1.032 |
| pH |
(1) |
(1) |
|
1 Within the range of 7.5 to 10.0 at all times. |
(i)
Subpart L—Leaching Wet Air Pollution Control and Precipitation of Nonphotographic Solutions Wet Air Pollution Control.
NSPS
|
mg/troy ounce of silver produced from leaching or silver precipitated |
| Copper |
5.671 |
2.703 |
| Zinc |
4.519 |
1.861 |
| Ammonia (as N) |
590.500 |
259.600 |
| Total suspended solids |
66.450 |
53.160 |
| pH |
(1) |
(1) |
|
1 Within the range of 7.5 to 10.0 at all times. |
(j)
Subpart L—Precipitation and Filtration of Nonphotograhic Solutions.
NSPS
|
mg/troy ounce of silver precipitated |
| Copper |
3.930 |
1.873 |
| Zinc |
3.132 |
1.290 |
| Ammonia (as N) |
409.300 |
179.900 |
| Total suspended solids |
46.050 |
36.840 |
| pH |
(1) |
(1) |
|
1 Within the range of 7.5 to 10.0 at all times. |
(k)
Subpart L—Floor and Equipment Washdown.
NSPS
|
mg/troy ounce of silver production |
| Copper |
.000 |
.000 |
| Zinc |
.000 |
.000 |
| Ammonia (as N) |
.000 |
.000 |
| Total suspended solids |
.000 |
.000 |
| pH |
(1) |
(1) |
|
1 Within the range of 7.5 to 10.0 at all times. |
[49 FR 8821, Mar. 8, 1984, as amended at 49 FR 29795, July 24, 1984]