40 CFR § 464.25
Pretreatment standards for existing sources
June 9, 2020
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
Open Table
| 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) | 0.0307 | 0.0168 |
| Lead (T) | 0.0211 | 0.0104 |
| Zinc (T) | 0.0303 | 0.0116 |
| TTO | 0.0335 | 0.0109 |
| Oil and grease (for alternate monitoring) | 1.2 | 0.399 |
(b) Direct Chill Casting Operations.
PSES
Open Table
| 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) | 0.928 | 0.506 |
| Lead (T) | 0.639 | 0.314 |
| Zinc (T) | 0.916 | 0.35 |
(c) Dust Collection Scrubber Operations.
PSES
Open Table
| 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) | 0.552 | 0.301 |
| Lead (T) | 0.38 | 0.187 |
| Zinc (T) | 0.545 | 0.208 |
| Total phenols | 0.617 | 0.215 |
| TTO | 1.65 | 0.54 |
| Oil and grease (for alternate monitoring) | 21.5 | 7.18 |
(d) Grinding Scrubber Operations. No discharge of process wastewater pollutants to a POTW.
(e) Investment Casting.
PSES
Open Table
| 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) | 8.48 | 4.63 |
| Lead (T) | 5.84 | 2.86 |
| Zinc (T) | 8.37 | 3.19 |
| TTO | 25.4 | 8.29 |
| Oil and grease for alternate monitoring) | 330 | 110 |
(f) Melting Furnace Scrubber Operations.
PSES
Open Table
| 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) | 1.81 | 0.988 |
| Lead (T) | 1.25 | 0.612 |
| Zinc (T) | 1.79 | 0.673 |
| Total phenols | 2.02 | 0.706 |
| TTO | 5.41 | 1.77 |
| Oil and grease (for alternate monitoring) | 70.6 | 23.5 |
(g) Mold Cooling Operations.
PSES
Open Table
| 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) | 0.392 | 0.214 |
| Lead (T) | 0.27 | 0.132 |
| Zinc (T) | 0.387 | 0.148 |
| TTO | 0.428 | 0.14 |
| Oil and grease (for alternate monitoring) | 15.3 | 5.09 |
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