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) Subpart L—Film Stripping.
| Pollutant or pollutant property
| Maximum for any 1 day
| Maximum for monthly average
|
|---|
| mg/troy ounce of silver from film stripping
|
| Copper | 95.670 | 50.350
|
| Zinc | 73.510 | 30.720
|
| Ammonia (as N) | 6,712.000 | 2,951.000
|
| Total suspended solids | 2,065.000 | 981.800
|
| pH | (
1) | (
1)
|
(b) Subpart L—Film Stripping Wet Air Pollution Control and Precipitation and Filtration of Film Stripping Solutions Wet Air Pollution Control.
| Pollutant or pollutant property
| Maximum for any 1 day
| Maximum for monthly average
|
|---|
| mg/troy ounce of silver from precipitation and filtration of film stripping solutions
|
| Copper | 1.843 | .970
|
| Zinc | 1.416 | .592
|
| Ammonia (as N) | 129.300 | 56.840
|
| Total suspended solids | 39.770 | 18.920
|
| pH | (
1) | (
1)
|
(c) Subpart L—Precipitation and Filtration of Film Stripping Solutions.
| Pollutant or pollutant property
| Maximum for any 1 day
| Maximum for monthly average
|
|---|
| mg/troy ounce of silver precipitated
|
| Copper | 109.400 | 57.570
|
| Zinc | 84.050 | 35.120
|
| Ammonia (as N) | 7,674.000 | 3,374.000
|
| Total suspended solids | 2,361.000 | 1,123.000
|
| pH | (
1) | (
1)
|
(d) Subpart L—Precipitation and Filtration of Photographic Solutions.
| Pollutant or pollutant property
| Maximum for any 1 day
| Maximum for monthly average
|
|---|
| mg/troy ounce of silver precipitated
|
| Copper | 50.540 | 26.600
|
| Zinc | 38.836 | 16.226
|
| Ammonia (as N) | 3,545.000 | 1,559.000
|
| Total suspended solids | 1,090.600 | 518.700
|
| pH | (
1) | (
1)
|
(e) Subpart L—Precipitation and Filtration of Photographic Solutions Wet Air Pollution Control.
| Pollutant or pollutant property
| Maximum for any 1 day
| Maximum for monthly average
|
|---|
| mg/troy ounce of silver from precipitation and filtration of photographic solutions
|
| Copper | 23.070 | 12.140
|
| Zinc | 17.730 | 7.406
|
| Ammonia (as N) | 1,618.000 | 711.400
|
| Total suspended solids | 497.800 | 236.800
|
| pH | (
1) | (
1)
|
(f) Subpart L—Electrolytic Refining.
| Pollutant or pollutant property
| Maximum for any 1 day
| Maximum for monthly average
|
|---|
| mg/troy ounce of silver from electrolytic refining
|
| Copper | 1.444 | .760
|
| Zinc | 1.110 | .464
|
| Ammonia (as N) | 101.300 | 44.540
|
| Total suspended solids | 31.160 | 14.820
|
| pH | (
1) | (
1)
|
(g) Subpart L—Furnace Wet Air Pollution Control.
| Pollutant or pollutant property
| Maximum for any 1 day
| Maximum for monthly average
|
|---|
| mg/troy ounce of silver roasted, smelted, or dried
|
| Copper | 1.273 | .670
|
| Zinc | .978 | .409
|
| Ammonia (as N) | 89.310 | 39.260
|
| Total suspended solids | 27.470 | 13.070
|
| pH | (
1) | (
1)
|
(h) Subpart L—Leaching.
| Pollutant or pollutant property
| Maximum for any 1 day
| Maximum for monthly average
|
|---|
| mg/troy ounce of silver produced from leaching
|
| Copper | .164 | .086
|
| Zinc | .126 | .053
|
| Ammonia (as N) | 11.470 | 5.040
|
| Total suspended solids | 3.526 | 1.677
|
| pH | (
1) | (
1)
|
(i) Subpart L—Leaching Wet Air Pollution Control and Precipitation of Nonphotographic Solutions Wet Air Pollution Control.
| Pollutant or pollutant property
| Maximum for any 1 day
| Maximum for monthly average
|
|---|
| mg/troy ounce of silver produced from leaching or silver precipitated
|
| Copper | 8.417 | 4.430
|
| Zinc | 6.468 | 2.703
|
| Ammonia (as N) | 590.500 | 259.600
|
| Total suspended solids | 181.700 | 86.390
|
| pH | (
1) | (
1)
|
(j) Subpart L—Precipitation and Filtration of Nonphotographic Solutions.
| Pollutant or pollutant property
| Maximum for any 1 day
| Maximum for monthly average
|
|---|
| mg/troy ounce of silver precipitated
|
| Copper | 5.833 | 3.070
|
| Zinc | 4.482 | 1.873
|
| Ammonia (as N) | 409.300 | 179.900
|
| Total suspended solids | 125.900 | 59.870
|
| pH | (
1) | (
1)
|
(k) Subpart L—Floor and Equipment Washdown.
| Pollutant or pollutant property
| Maximum for any 1 day
| Maximum for monthly average
|
|---|
| 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)
|
authority: Secs. 301, 304 (b), (c), (e), and (g), 306 (b) and (c), 307 (b) and (c), 308 and 501 of the Clean Water Act (the Federal Water Pollution Control Act Amendments of 1972, as amended by the Clean Water Act of 1977) and the Water Quality Act of 1987 (the “Act”);
33 U.S.C. 1311,
1314,
c,
e,
and, 1316 (b) and
c, 1317 (b) and
c,
1318; 86 Stat. 816, Pub. L. 92-500; 91 Stat. 1567, Pub. L. 95-217; 101 Stat. 7, Pub. L. 100-4
source: 49 FR 8790, Mar. 8, 1984, unless otherwise noted.
cite as: 40 CFR 421.122