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.

§ 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
1 Within the range of 7.0 to 10.0 at all times.
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)
(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
1 Within the range of 7.0 to 10.0 at all times.
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)
(c) Subpart J—Alkali Leach Wash.
BPT Effluent Limitations
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
1 Within the range of 7.0 to 10.0 at all times.
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)
(d) Subpart J—Alkali Leach Wash Condensate.
BPT Effluent Limitations
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
1 Within the range of 7.0 to 10.0 at all times.
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)
(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
1 Within the range of 7.0 to 10.0 at all times.
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)
(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
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.
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)
(g) Subpart J—Calcium Tungstate Precipitate Wash.
BPT Effluent Limitations
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
1 Within the range of 7.0 to 10.0 at all times.
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)
(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
1 Within the range of 7.0 to 10.0 at all times.
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)
(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
1 Within the range of 7.0 to 10.0 at all times.
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)
(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
1 Within the range of 7.0 to 10.0 at all times.
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)
(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
1 Within the range of 7.0 to 10.0 at all times.
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)
(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
1 Within the range of 7.0 to 10.0 at all times.
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)
(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
1 Within the range of 7.0 to 10.0 at all times.
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)
(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
1 Within the range of 7.0 to 10.0 at all times.
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)
[49 FR 8812, Mar. 8, 1984, as amended at 53 FR 1706, Jan. 21, 1988]

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