Pretreatment standards for existing sources.

  1. Law
  2. CFR 40
  3. Protection of Environment
  4. Environmental Protection Agency
  5. Effluent Guidelines and Standards
  6. Nonferrous Metals Manufacturing Point Source Category
  7. Primary Tungsten Subcategory
  8. Pretreatment standards for existing sources.

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§ 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.

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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
Lead 11.490 5.333
Zinc 41.850 17.230
Ammonia (as N) 5,469.000 2,404.000

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

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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
Lead 1.003 0.466
Zinc 3.653 1.504
Ammonia (as N) 477.400 209.900

(c) Subpart J - Alkali Leach Wash.

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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
Lead 0.000 0.000
Zinc 0.000 0.000
Ammonia (as N) 0.000 0.000

(d) Subpart J - Alkali Leach Wash Condensate.

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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
Lead 5.372 2.494
Zinc 19.570 8.057
Ammonia (as N) 2,557.000 1,124.000

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

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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
Lead 24.780 11.500
Zinc 90.240 37.160
Ammonia (as N) 11,790.000 5,185.000

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

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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
Lead 24.780 11.500
Zinc 90.240 37.160
Ammonia (as N)1 11,790.000 5,185.000

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.

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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
Lead 20.670 9.594
Zinc 75.280 31.000
Ammonia (as N) 9,838.000 4,325.000

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

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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
Lead 0.000 0.000
Zinc 0.000 0.000
Ammonia (as N) 0.000 0.000

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

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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
Lead 0.773 0.359
Zinc 2.817 1.160
Ammonia (as N) 368.200 161.900

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

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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
Lead 0.018 0.008
Zinc 0.064 0.026
Ammonia (as N) 8.398 3.692

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

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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
Zinc 3.142 1.294
Ammonia (as N) 410.600 180.500

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

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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) 65.190 28.660

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

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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
Zinc 2.448 1.008
Ammonia (as N) 319.900 140.700

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

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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 0.000 0.000
Zinc 0.000 0.000
Ammonia (as N) 0.000 0.000

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


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