Regulations last checked for updates: May 19, 2024

Title 40 - Protection of Environment last revised: May 16, 2024
All TitlesTitle 40Chapter IPart 421Subpart J - Subpart J—Primary Tungsten Subcategory
View all text of Subpart J [§ 421.100 - § 421.107]
§ 421.104 - Standards of performance for new sources.

Any new source subject to this subpart shall achieve the following new source performance standards:

(a) Subpart J—Tungstic Acid Rinse.

NSPS

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of tungstic acid (as W) produced
Lead11.4905.333
Zinc41.85017.230
Ammonia (as N)5,469.0002,404.000
Total suspended solids615.400492.300
pH( 1)( 1)

1 Within the range of 7.0 to 10.0 at all times.

(b) Subpart J—Acid Leach Wet Air Pollution

NSPS

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of tungstic acid (as W) produced
Lead1.0030.466
Zinc3.6531.504
Ammonia (as N)477.400209.900
Total suspended solids53.72042.970
pH( 1)( 1)

1 Within the range of 7.0 to 10.0 at all times.

(c) Subpart J—Alkali Leach Wash.

NSPS

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of sodium tungstate (as W) produced
Lead0.0000.000
Zinc0.0000.000
Ammonia (as N)0.0000.000
Total suspended solids0.0000.000
pH( 1)( 1)

1 Within the range of 7.0 to 10.0 at all times.

(d) Subpart J—Alkali Leach Wash Condensate.

NSPS

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of sodium tungstate (as W) produced
Lead5.3722.494
Zinc19.5708.057
Ammonia (as N)2,557.0001,124.000
Total suspended solids287.800229.600
pH( 1)( 1)

1 Within the range of 7.0 to 10.0 at all times.

(e) Subpart J—Ion Exchange Raffinate (Commingled With Other Process or Nonprocess Waters).

NSPS

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of ammonium tungstate (as W) produced
Lead24.78011.500
Zinc90.24037.160
Ammonia (as N)11,790.0005,185.000
Total suspended solids1,327.0001,062.000
pH( 1)( 1)

1 Within the range of 7.0 to 10.0 at all times.

(f) Subpart J—Ion Exchange Raffinate (Not Commingled With Other Process or Nonprocess Waters).

NSPS

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of ammonium tungstate (as W) produced
Lead24.78011.500
Zinc90.24037.160
Ammonia (as N) ( 2)11,790.0005,185.000
Total suspended solids1,327.0001,062.000
pH( 1)( 1)

1 Within the range of 7.0 to 10.0 at all times.

2 The new source standard for this pollutant does not apply if (a) the mother liquor feed to the ion exchange process or the raffinate from the ion exchange process contains sulfates at concentrations exceeding 1000 mg/l; (b) this mother liquor or raffinate is treated by ammonia steam stripping; and (c) such mother liquor or raffinate is not commingled with any other process or nonprocess waters prior to steam stripping for ammonia removal.

(g) Subpart J—Calcium Tungstate Precipitate Wash.

NSPS

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of calcium tungstate (as W) produced
Lead20.6709.594
Zinc75.28031.000
Ammonia (as N)9,838.0004,325.000
Total suspended solids1,107.000885.600
pH( 1)( 1)

1 Within the range of 7.0 to 10.0 at all times.

(h) Subpart J—Crystallization and Drying of Ammonium Paratungstate.

NSPS

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of ammonium paratungstate (as W) produced
Lead0.0000.000
Zinc0.0000.000
Ammonia (as N)0.0000.000
Total suspended solids0.0000.000
pH( 1)( 1)

1 Within the range of 7.0 to 10.0 at all times.

(i) Subpart J—Ammonium Paratungstate Conversion to Oxides Wet Air Pollution Control.

NSPS

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pound per million pounds) of tungstic oxide (as W) produced
Lead0.7730.359
Zinc2.8171.160
Ammonia (as N)368.200161.900
Total suspended solids41.43033.150
pH( 1)( 1)

1 Within the range of 7.0 to 10.0 at all times.

(j) Subpart J—Ammonium Paratungstate Conversion to Oxides Water of Formation.

NSPS

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of tungstic oxide (as W) produced
Lead0.0180.008
Zinc0.0640.026
Ammonia (as N)8.3983.692
Total suspended solids0.9450.756
pH( 1)( 1)

1 Within the range of 7.0 to 10.0 at all times.

(k) Subpart J—Reduction to Tungsten Wet Air Pollution Control.

NSPS

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of tungsten metal produced
Lead.862.400
Zinc3.1421.294
Ammonia (as N)410.600180.500
Total suspended solids46.20036.960
pH( 1)( 1)

1Within the range of 7.0 to 10.0 at all times.

(l) Subpart J—Reduction to Tungsten Water of Formation.

NSPS

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of tungsten metal produced
Lead.137.064
Zinc.499.205
Ammonia (as N)65.19028.660
Total suspended solids7.3355.868
pH( 1)( 1)

1Within the range of 7.0 to 10.0 at all times.

(m) Subpart J—Tungsten Power Acid Leach and Wash.

NSPS

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of tungsten metal produced
Lead.672.312
Zinc2.4481.008
Ammonia (as N)319.900140.700
Total suspended solids36.00028.800
pH( 1)( 1)

1Within the range of 7.0 to 10.0 at all times.

(n) Subpart J—Molybdenum Sulfide Precipitation Wet Air Pollution Control.

NSPS

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of tungsten metal produced
Lead.00.000
Zinc.000.000
Ammonia (as N).000.000
Total suspended solids.000.000
pH( 1)( 1)

1Within the range of 7.0 to 10.0 at all times.

[49 FR 8812, Mar. 8, 1984, as amended at 53 FR 1709, Jan. 21, 1988]
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) andc, 1317 (b) andc,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 421.104
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