40 CFR 421.114: Standards of performance for new sources.

Any new source subject to this subpart shall achieve the following new source performance standards:

(a) Subpart K—Concentrate Digestion Wet Air Pollution Control.

NSPS

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

mg/kg (pounds per million pounds) of concentrate digested

Lead .174 .081

Zinc .635 .261

Ammonia (as N) 82.910 36.450

Fluoride 21.770 12.440

Total suspended solids 9.330 7.464

pH (1) (1)

1 Within the range of 7.5 to 10.0 at all times.

(b) Subpart K—Solvent Extraction Raffinate.

NSPS

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

mg/kg (pounds per million pounds) of concentrate digested

Lead 2.592 1.203

Zinc 9.442 3.888

Ammonia (as N) 1,233.000 542.5000

Fluoride 324.000 185.100

Total Suspended Solids 138.900 111.100

pH (1) (1)

1 Within the range of 7.5 to 10.0 at all times.

(c) Subpart K—Solvent Extraction Wet Air Pollution Control.

NSPS

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

mg/kg (pounds per million pounds) of concentrate digested

Lead .069 .032

Zinc .251 .103

Ammonia (as N) 32.790 14.420

Fluoride 8.610 4.920

Total suspended solids 3.690 2.952

pH (1) (1)

1 Within the range of 7.5 to 10.0 at all times.

(d) Subpart K—Precipitation and Filtration.

NSPS

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

mg/kg (pounds per million pounds) of concentrate digested

Lead 3.833 1.780

Zinc 13.960 5.750

Ammonia (as N) 1,825.000 802.200

Fluoride 479.100 273.800

Total suspended solids 205.400 164.300

pH (1) (1)

1 Within the range of 7.5 to 10.0 at all times.

(e) Subpart K—Precipitation and Filtration Wet Air Pollution Control.

NSPS

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

mg/kg (pounds per million pounds) of concentrate digested

Lead 1.778 .826

Zinc 6.478 2.668

Ammonia (as N) 846.600 372.200

Fluoride 222.300 127.000

Total suspended solids 95.270 76.210

pH (1) (1)

1 Within the range of 7.5 to 10.0 at all times.

(f) Subpart K—Tantalum Salt Drying.

NSPS

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

mg/kg (pounds per million pounds) of tantalum salt dried

Lead 16.950 7.871

Zinc 61.750 25.430

Ammonia (as N) 8,070.000 3,548.000

Fluoride 2,119.000 1,211.000

Total suspended solids 908.200 726.500

pH (1) (1)

1 Within the range of 7.5 to 10.0 at all times.

(g) Subpart K—Oxides Calcining Wet Air Pollution Control.

NSPS

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

mg/kg (pounds per million pounds) of columbium-tantalum oxide dried

Lead 1.076 .500

Zinc 3.919 1.614

Ammonia (as N) 512.200 225.200

Fluoride 134.500 76.840

Total suspended solids 57.630 46.110

pH (1) (1)

1 Within the range of 7.5 to 10.0 at all times.

(h) Subpart K—Reduction of Tantalum Salt to Metal.

NSPS

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

mg/kg (pounds per million pounds) of tantalum salt reduced

Lead 46.500 21.590

Zinc 169.400 69.750

Ammonia (as N) 22,140.000 9,732.000

Fluoride 5,813.000 3,322.000

Total suspended solids 2,491.000 1,993.000

pH (1) (1)

1 Within the range of 7.5 to 10.0 at all times.

(i) Subpart K—Reduction of Tantalum Salt to Metal Wet Air Pollution Control.

NSPS

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

mg/kg (pounds per million pounds) of tantalum salt reduced

Lead .572 .266

Zinc 2.084 .858

Ammonia (as N) 272.400 119.700

Fluoride 71.510 40.860

Total suspended solids 30.650 24.520

pH (1) (1)

1 Within the range of 7.5 to 10.0 at all times.

(j) Subpart K—Tantalum Powder Wash.

NSPS

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

mg/kg (pounds per million pounds) of tantalum powder washed

Lead 5.721 2.656

Zinc 20.840 8.582

Ammonia (as N) 2,724.000 1,198.000

Fluoride 715.200 408.700

Total suspended solids 306.500 245.200

pH (1) (1)

1 Within the range of 7.5 to 10.0 at all times.

(k) Subpart K—Consolidation and Casting Contact Cooling.

NSPS

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

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)

1 Within the range of 7.5 to 10.0 at all times.