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

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(c) Subpart J—Alkali Leach Wash.

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(d) Subpart J—Alkali Leach Wash Condensate.

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

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

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(g) Subpart J—Calcium Tungstate Precipitate Wash.

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

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

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

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

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

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

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

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