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.
| Pollutant or pollutant property
| Maximum for any 1 day
| Maximum for monthly average
|
|---|
| 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.
| Pollutant or pollutant property
| Maximum for any 1 day
| Maximum for monthly average
|
|---|
| 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.
| Pollutant or pollutant property
| Maximum for any 1 day
| Maximum for monthly average
|
|---|
| 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.
| Pollutant or pollutant property
| Maximum for any 1 day
| Maximum for monthly average
|
|---|
| 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.
| Pollutant or pollutant property
| Maximum for any 1 day
| Maximum for monthly average
|
|---|
| 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.
| Pollutant or pollutant property
| Maximum for any 1 day
| Maximum for monthly average
|
|---|
| 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.
| 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 | 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.
| Pollutant or pollutant property
| Maximum for any 1 day
| Maximum for monthly average
|
|---|
| 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.
| Pollutant or pollutant property
| Maximum for any 1 day
| Maximum for monthly average
|
|---|
| 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.
| Pollutant or pollutant property
| Maximum for any 1 day
| Maximum for monthly average
|
|---|
| 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.
| 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 |
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 421.115