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 K—Concentrate Digestion Wet Air Pollution Control.
| Pollutant or pollutant property
| Maximum for any 1 day
| Maximum for monthly average
|
|---|
| mg/kg (pounds per million pounds) of concentrate digested
|
| Lead | 2.612 | 1.244
|
| Zinc | 9.080 | 3.794
|
| Ammonia (as N) | 829.000 | 364.500
|
| Fluoride | 217.700 | 124.400
|
| Total suspended solids | 255.000 | 121.300
|
| pH | (
1) | (
1)
|
(b) Subpart K—Solvent Extraction Raffinate.
| Pollutant or pollutant property
| Maximum for any 1 day
| Maximum for monthly average
|
|---|
| mg/kg (pounds per million pounds) of concentrate digested
|
| Lead | 3.888 | 1.851
|
| Zinc | 13.520 | 5.647
|
| Ammonia (as N) | 1,233.000 | 542.500
|
| Fluoride | 324.000 | 185.100
|
| Total Suspended Solids | 379.500 | 189.500
|
| pH | (
1) | (
1)
|
(c) Subpart K—Solvent Extraction Wet Air Pollution Control.
| Pollutant or pollutant property
| Maximum for any 1 day
| Maximum for monthly average
|
|---|
| mg/kg (pounds per million pounds) of concentrate digested
|
| Lead | 1.032 | .491
|
| Zinc | 3.586 | 1.498
|
| Ammonia (as N) | 327.400 | 143.900
|
| Fluoride | 85.960 | 49.120
|
| Total suspended solids | 100.700 | 47.890
|
| pH | (
1) | (
1)
|
(d) Subpart K—Precipitation and Filtration.
| Pollutant or pollutant property
| Maximum for any 1 day
| Maximum for monthly average
|
|---|
| mg/kg (pounds per million pounds) of concentrate digested
|
| Lead | 5.750 | 2.738
|
| Zinc | 19.990 | 8.350
|
| Ammonia (as N) | 1,825.000 | 802.200
|
| Fluoride | 479.100 | 273.800
|
| Total suspended solids | 561.300 | 267.000
|
| pH | (
1) | (
1)
|
(e) Subpart K—Precipitation and Filtration Wet Air Pollution Control.
| Pollutant or pollutant property
| Maximum for any 1 day
| Maximum for monthly average
|
|---|
| mg/kg (pounds per million pounds) of concentrate digested
|
| Lead | 26.680 | 12.700
|
| Zinc | 92.730 | 38.740
|
| Ammonia (as N) | 8,466.000 | 3,722.000
|
| Fluoride | 2,223.000 | 1,270.000
|
| Total suspended solids | 2,604.000 | 1,239.000
|
| pH | (
1) | (
1)
|
(f) Subpart K—Tantalum Salt Drying.
| Pollutant or pollutant property
| Maximum for any 1 day
| Maximum for monthly average
|
|---|
| mg/kg (pounds per million pounds) of tantalum salt dried
|
| Lead | 25.430 | 12.110
|
| Zinc | 88.390 | 36.930
|
| Ammonia (as N) | 8,070.000 | 3,548.000
|
| Fluoride | 2,119.000 | 1,211.000
|
| Total suspended solids | 2,482.000 | 1,181.000
|
| pH | (
1) | (
1)
|
(g) Subpart K—Oxides Calcining Wet Air Pollution Control.
| Pollutant or pollutant property
| Maximum for any 1 day
| Maximum for monthly average
|
|---|
| mg/kg (pounds per million pounds) of columbium-tantalum oxide dried
|
| Lead | 16.140 | 7.685
|
| Zinc | 56.100 | 23.440
|
| Ammonia (as N) | 5,122.000 | 2,252.000
|
| Fluoride | 1,345.000 | 768.500
|
| Total suspended solids | 1,576.000 | 749.200
|
| pH | (
1) | (
1)
|
(h) Subpart K—Reduction of Tantalum Salt to Metal.
| Pollutant or pollutant property
| Maximum for any 1 day
| Maximum for monthly average
|
|---|
| mg/kg (pounds per million pounds) of tantalum salt reduced
|
| Lead | 69.750 | 33.220
|
| Zinc | 242.500 | 101.300
|
| Ammonia (as N) | 22,140.000 | 9,732.000
|
| Fluoride | 5,813.000 | 3,322.000
|
| Total suspended solids | 6,809.000 | 3,239.000
|
| pH | (
1) | (
1)
|
(i) Subpart K—Reduction of Tantalum Salt to Metal Wet Air Pollution Control.
| Pollutant or pollutant property
| Maximum for any 1 day
| Maximum for monthly average
|
|---|
| mg/kg (pounds per million pounds) of tantalum salt reduced
|
| Lead | .858 | .409
|
| Zinc | 2.983 | 1.246
|
| Ammonia (as N) | 272.400 | 119.700
|
| Fluoride | 71.510 | 40.860
|
| Total suspended solids | 83.770 | 39.840
|
| pH | (
1) | (
1)
|
(j) Subpart K—Tantalum Powder Wash.
| Pollutant or pollutant property
| Maximum for any 1 day
| Maximum for monthly average
|
|---|
| mg/kg (pounds per million pounds) of tantalum power washed
|
| Lead | 8.582 | 4.087
|
| Zinc | 29.830 | 12.470
|
| Ammonia (as N) | 2,724.000 | 1,198.000
|
| Fluoride | 715.200 | 408.700
|
| Total suspended solids | 837.800 | 398.500
|
| pH | (
1) | (
1)
|
(k) Subpart K—Consolidation and Casting Contact Cooling.
| Pollutant or pollutant property
| Maximum for any 1 day
| Maximum for monthly average
|
|---|
| 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
|
| 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 421.112