40 CFR 421.282: 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) Tantalum alloy leach and rinse.

BPT Limitations for the Secondary Tantalum Subcategory

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

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

Copper 438.100 230.600

Lead 96.850 46.120

Nickel 442.800 292.900

Zinc 336.700 140.700

Tantalum 103.800

Total suspended solids 9,455.000 4,497.000

pH (1) (1)

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

(b) Capacitor leach and rinse.

BPT Limitations for the Secondary Tantalum Subcategory

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

mg/kg (pounds per million pounds) of tantalum powder produced from leaching

Copper 38.380 20.200

Lead 8.484 4.040

Nickel 38.780 25.650

Zinc 29.490 12.320

Tantalum 9.090

Total suspended solids 828.200 393.900

pH (1) (1)

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

(c) Tantalum sludge leach and rinse.

BPT Limitations for the Secondary Tantalum Subcategory

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

mg/kg (pounds per million pounds) of equivalent pure tantalum powder produced

Copper 390.100 205.300

Lead 86.230 41.060

Nickel 394.200 260.700

Zinc 299.700 125.200

Tantalum 92.390

Total suspended solids 8,417.000 4,003.000

pH (1) (1)

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

(d) Tantalum powder acid wash and rinse.

BPT Limitations for the Secondary Tantalum Subcategory

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

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

Copper 0.665 0.350

Lead 0.147 0.070

Nickel 0.672 0.445

Zinc 0.511 0.214

Tantalum 0.158

Total suspended solids 14.350 6.825

pH (1) (1)

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

(e) Leaching wet air pollution control.

BPT Limitations for the Secondary Tantalum Subcategory

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

mg/kg (pounds per million pounds) of equivalent pure tantalum powder produced

Copper 9.272 4.880

Lead 2.050 0.976

Nickel 9.370 6.198

Zinc 7.125 2.977

Tantalum 2.196

Total suspended solids 200.100 95.160

pH (1) (1)

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