40 CFR 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

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.

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.

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.

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).

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).

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.

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.

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.

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.

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.

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.

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.

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.

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