40 C.F.R. § 421.105

Current through September 30, 2024
Section 421.105 - Pretreatment standards for existing sources

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 tungsten process wastewater introduced into a POTW shall not exceed the following values:

(a) Subpart J-Tungstic Acid Rinse.

PSES

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

(b) Subpart J-Acid Leach Wet Air Pollution Control.

PSES

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

(c) Subpart J-Alkali Leach Wash.

PSES

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

(d) Subpart J-Alkali Leach Wash Condensate.

PSES

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

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

PSES

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

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

PSES

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)111,790.0005,185.000

1 The pretreatment 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.

PSES

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

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

PSES

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

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

PSES

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
Lead0.7730.359
Zinc2.8171.160
Ammonia (as N)368.200161.900

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

PSES

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

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

PSES

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

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

PSES

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

(m) Subpart J-Tungsten Powder Acid Leach and Wash.

PSES

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

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

PSES

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds of tungsten metal produced
Lead0.0000.000
Zinc0.0000.000
Ammonia (as N)0.0000.000

40 C.F.R. §421.105

49 FR 8812, Mar. 8, 1984, as amended at 53 FR 1711, Jan. 21, 1988