40 CFR 421.286: Pretreatment standards for new sources.

Except as provided in 40 CFR 403.7, any new source subject to this subpart which introduces pollutants into a publicly owned treatment works must comply with 40 CFR part 403 and achieve the following pretreatment standards for new sources. The mass of wastewater pollutants in secondary tantalum process wastewater introduced into a POTW shall not exceed the following values:

(a) Tantalum alloy leach and rinse.

PSNS 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 295.200 140.700

Lead 64.570 29.980

Nickel 126.800 85.320

Zinc 235.200 96.850

Tantalum 103.800

(b) Capacitor leach and rinse.

PSNS 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 25.860 12.320

Lead 5.656 2.626

Nickel 11.110 7.474

Zinc 20.600 8.484

Tantalum 9.090

(c) Tantalum sludge leach and rinse.

PSNS 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 262.800 125.200

Lead 57.480 26.690

Nickel 112.900 75.960

Zinc 209.400 86.230

Tantalum 92.390

(d) Tantalum powder acid wash and rinse.

PSNS 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 0.448 0.214

Lead 0.098 0.046

Nickel 0.193 0.130

Zinc 0.357 0.147

Tantalum 0.158

(e) Leaching wet air pollution control.

PSNS 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 6.246 2.977

Lead 1.366 0.634

Nickel 2.684 1.806

Zinc 4.978 2.050

Tantalum 2.196