40 CFR 421.102: Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.

Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this subpart shall achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable technology currently available:

(a) Subpart J—Tungstic Acid Rinse.

BPT Effluent Limitations

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 17.230 8.205

Zinc 59.900 25.030

Ammonia (as N) 5,469.000 2,404.00

Total suspended solids 1,682.000 800.000

pH (1) (1)

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

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

BPT Effluent Limitations

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 15.040 7.162

Zinc 52.280 21.840

Ammonia (as N) 4,773.000 2,098.000

Total suspended solids 1,468.000 698.300

pH (1) (1)

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

(c) Subpart J—Alkali Leach Wash.

BPT Effluent Limitations

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 0.000 0.000

Zinc 0.000 0.000

Ammonia (as N) 0.000 0.000

Total suspended solids 0.000 0.000

pH (1) (1)

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

(d) Subpart J—Alkali Leach Wash Condensate.

BPT Effluent Limitations

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 8.057 3.837

Zinc 28.011 11.700

Ammonia (as N) 2,557.000 1,124.000

Total suspended solids 786.200 374.100

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).

BPT Effluent Limitations

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 37.160 17.700

Zinc 129.200 53.970

Ammonia (as N) 11,790.000 5,185.000

Total Suspended solids 3,627.000 1,726.000

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).

BPT Effluent Limitations

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 37.160 17.700

Zinc 129.200 53.970

Ammonia (as N) (2) 11,790.000 5,185.000

Total suspended solids 3,627.000 1,726.000

pH (1) (1)

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

2 The effluent limitation guideline 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.

BPT Effluent Limitations

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 31.000 14.760

Zinc 107.800 45.020

Ammonia (as N) 9,838.000 4,325.000

Total suspended solids 3,026.000 1,439.000

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.

BPT Effluent Limitations

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

Total suspended solids 0.000 0.000

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.

BPT Effluent Limitations

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 11.600 5.523

Zinc 40.320 16.850

Ammonia (as N) 3,681.000 1,618.000

Total suspended solids 1,132.000 538.500

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.

BPT Effluent Limitations

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 0.026 0.013

Zinc 0.092 0.038

Ammonia (as N) 8.398 3.692

Total suspended solids 2.583 1.229

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.

BPT Effluent Limitations

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average

mg/kg (pounds per million pounds) of tungsten metal produced

Lead 12.940 6.161

Zinc 44.970 18.790

Ammonia (as N) 4,106.000 1,805.000

Total suspended solids 1,263.000 600.700

pH (1) (1)

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

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

BPT Effluent Limitations

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average

mg/kg (pounds per million pounds) of tungsten metal produced

Lead .205 .098

Zinc .714 .298

Ammonia (as N) 65.190 28.660

Total suspended solids 20.050 9.536

pH (1) (1)

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

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

BPT Effluent Limitations

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average

mg/kg (pounds per million pounds) of tungsten metal produced

Lead 1.008 0.48

Zinc 3.504 1.464

Ammonia (as N) 319.900 140.700

Total suspended solids 98.400 46.800

pH (1) (1)

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

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

BPT Effluent Limitations

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average

mg/kg (pounds per million pounds) of tungsten metal produced

Lead .000 .000

Zinc .000 .000

Ammonia (as N) .000 .000

Total suspended solids .000 .000

pH (1) (1)

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