40 CFR 421.112 - Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.

§ 421.112 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 K—Concentrate Digestion 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 7.5 to 10.0 at all times.
mg/kg (pounds per million pounds) of concentrate digested
Lead 2.612 1.244
Zinc 9.080 3.794
Ammonia (as N) 829.000 364.500
Fluoride 217.700 124.400
Total suspended solids 255.000 121.300
pH (1) (1)
(b) Subpart K—Solvent Extraction Raffinate.
BPT Effluent Limitations
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
AAWithin the range of 7.5 to 10.0 at all times.
mg/kg (pounds per million pounds) of concentrate digested
Lead 3.888 1.851
Zinc 13.520 5.647
Ammonia (as N) 1,233.000 542.500
Fluoride 324.000 185.100
Total Suspended Solids 379.500 189.500
pH (1) (1)
(c) Subpart K—Solvent Extraction 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 7.5 to 10.0 at all times.
mg/kg (pounds per million pounds) of concentrate digested
Lead 1.032 .491
Zinc 3.586 1.498
Ammonia (as N) 327.400 143.900
Fluoride 85.960 49.120
Total suspended solids 100.700 47.890
pH (1) (1)
(d) Subpart K—Precipitation and Filtration.
BPT Effluent Limitations
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
1 Within the range of 7.5 to 10.0 at all times.
mg/kg (pounds per million pounds) of concentrate digested
Lead 5.750 2.738
Zinc 19.990 8.350
Ammonia (as N) 1,825.000 802.200
Fluoride 479.100 273.800
Total suspended solids 561.300 267.000
pH (1) (1)
(e) Subpart K—Precipitation and Filtration 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 7.5 to 10.0 at all times.
mg/kg (pounds per million pounds) of concentrate digested
Lead 26.680 12.700
Zinc 92.730 38.740
Ammonia (as N) 8,466.000 3,722.000
Fluoride 2,223.000 1,270.000
Total suspended solids 2,604.000 1,239.000
pH (1) (1)
(f) Subpart K—Tantalum Salt Drying.
BPT Effluent Limitations
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
1 Within the range of 7.5 to 10.0 at all times.
mg/kg (pounds per million pounds) of tantalum salt dried
Lead 25.430 12.110
Zinc 88.390 36.930
Ammonia (as N) 8,070.000 3,548.000
Fluoride 2,119.000 1,211.000
Total suspended solids 2,482.000 1,181.000
pH (1) (1)
(g) Subpart K—Oxides Calcining 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 7.5 to 10.0 at all times.
mg/kg (pounds per million pounds) of columbium-tantalum oxide dried
Lead 16.140 7.685
Zinc 56.100 23.440
Ammonia (as N) 5,122.000 2,252.000
Fluoride 1,345.000 768.500
Total suspended solids 1,576.000 749.200
pH (1) (1)
(h) Subpart K—Reduction of Tantalum Salt to Metal.
BPT Effluent Limitations
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
1 Within the range of 7.5 to 10.0 at all times.
mg/kg (pounds per million pounds) of tantalum salt reduced
Lead 69.750 33.220
Zinc 242.500 101.300
Ammonia (as N) 22,140.000 9,732.000
Fluoride 5,813.000 3,322.000
Total suspended solids 6,809.000 3,239.000
pH (1) (1)
(i) Subpart K—Reduction of Tantalum Salt to Metal 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 7.5 to 10.0 at all times.
mg/kg (pounds per million pounds) of tantalum salt reduced
Lead .858 .409
Zinc 2.983 1.246
Ammonia (as N) 272.400 119.700
Fluoride 71.510 40.860
Total suspended solids 83.770 39.840
pH (1) (1)
(j) Subpart K—Tantalum Powder Wash.
BPT Effluent Limitations
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
1 Within the range of 7.5 to 10.0 at all times.
mg/kg (pounds per million pounds) of tantalum power washed
Lead 8.582 4.087
Zinc 29.830 12.470
Ammonia (as N) 2,724.000 1,198.000
Fluoride 715.200 408.700
Total suspended solids 837.800 398.500
pH (1) (1)
(k) Subpart K—Consolidation and Casting Contact Cooling.
BPT Effluent Limitations
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
1 Within the range of 7.5 to 10.0 at all times.
mg/kg (pounds per million pounds) of columbium or tantalum cast or consolidated
Lead .000 .000
Zinc .000 .000
Ammonia (as N) .000 .000
Fluoride .000 .000
Total suspended solids .000 .000
pH (1) (1)
[49 FR 8817, Mar. 8, 1984, as amended at 49 FR 29795, July 24, 1984; 50 FR 12253, Mar. 28, 1985]

Title 40 published on 2013-07-01

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