Statutes, codes, and regulations
Code of Federal Regulations
Title 40 - PROTECTION OF ENVIRONMENTChapter I - ENVIRONMENTAL PROTECTION AGENCYSubchapter N - EFFLUENT GUIDELINES AND STANDARDSPart 464 - METAL MOLDING AND CASTING POINT SOURCE CATEGORY
Subpart B - COPPER CASTING SUBCATEGORY
Section 464.25 - Pretreatment standards for existing sources

40 C.F.R. § 464.25

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Current through October 31, 2024
Section 464.25 - Pretreatment standards for existing sources

Except as provided in 40 CFR 403.7 and 403.13 , any existing 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 existing sources.

(a)Casting Quench Operations.

PSES

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
kg/1000 kkg (pounds per million pounds) of metal poured
Copper (T)0.03070.0168
Lead (T)0.02110.0104
Zinc (T)0.03030.0116
TTO0.03350.0109
Oil and grease (for alternate monitoring)1.20.399

(b)Direct Chill Casting Operations.

PSES

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
kg/1,000 kkg (pounds per million pounds) of metal poured
Copper (T)0.9280.506
Lead (T)0.6390.314
Zinc (T)0.9160.35

(c)Dust Collection Scrubber Operations.

PSES

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
kg/62.3 million Sm3 (pounds per billion SCF) of air scrubbed
Copper (T)0.5520.301
Lead (T)0.380.187
Zinc (T)0.5450.208
Total phenols0.6170.215
TTO1.650.54
Oil and grease (for alternate monitoring)21.57.18

(d)Grinding Scrubber Operations. No discharge of process wastewater pollutants to a POTW.
(e)Investment Casting.

PSES

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
kg/1,000 kkg (pounds per million pounds) of metal poured
Copper (T)8.484.63
Lead (T)5.842.86
Zinc (T)8.373.19
TTO25.48.29
Oil and grease for alternate monitoring)330110

(f)Melting Furnace Scrubber Operations.

PSES

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
kg/62.3 million Sm3 (pounds per billion SCF) of air scrubbed
Copper (T)1.810.988
Lead (T)1.250.612
Zinc (T)1.790.673
Total phenols2.020.706
TTO5.411.77
Oil and grease (for alternate monitoring)70.623.5

(g)Mold Cooling Operations.

PSES

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
kg/1,000 kkg (pounds per million pounds) of metal poured
Copper (T)0.3920.214
Lead (T)0.270.132
Zinc (T)0.3870.148
TTO0.4280.14
Oil and grease (for alternate monitoring)15.35.09

40 C.F.R. §464.25