Statutes, codes, and regulations
Code of Federal Regulations
Title 40 - PROTECTION OF ENVIRONMENTChapter I - ENVIRONMENTAL PROTECTION AGENCYSubchapter N - EFFLUENT GUIDELINES AND STANDARDSPart 421 - NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORY
Subpart Z - SECONDARY TANTALUM SUBCATEGORY
Section 421.286 - Pretreatment standards for new sources

40 C.F.R. § 421.286

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Current through October 31, 2024
Section 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
Copper295.200140.700
Lead64.57029.980
Nickel126.80085.320
Zinc235.20096.850
Tantalum103.800

(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
Copper25.86012.320
Lead5.6562.626
Nickel11.1107.474
Zinc20.6008.484
Tantalum9.090

(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
Copper262.800125.200
Lead57.48026.690
Nickel112.90075.960
Zinc209.40086.230
Tantalum92.390

(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
Copper0.4480.214
Lead0.0980.046
Nickel0.1930.130
Zinc0.3570.147
Tantalum0.158

(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
Copper6.2462.977
Lead1.3660.634
Nickel2.6841.806
Zinc4.9782.050
Tantalum2.196

40 C.F.R. §421.286