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§ 461.74 Pretreatment standards for existing sources (PSES).
(a) Except as provided in 40 CFR 403.7 and 403.13, any existing source subject to this subpart that introduces pollutants into a publicly owned treatment works must comply with 40 CFR part 403 and achieve the following pretreatment standards for existing sources:
(1) Subpart G—Wet Amalgamated Powder Anode—PSES.
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| Metric units—mg/kg of zinc | ||
| English units—pounds per 1,000,000 pounds of zinc | ||
| Chromium | 0.24 | 0.099 |
| Mercury | 0.14 | 0.055 |
| Silver | 0.23 | 0.093 |
| Zinc | 0.80 | 0.34 |
| Manganese | 0.37 | 0.16 |
(2) Subpart G—Gelled Amalgam Anodes—PSES.
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| Metric units—mg/kg of zinc | ||
| English units—pounds per 1,000,000 pounds of zinc | ||
| Chromium | 0.030 | 0.12 |
| Mercury | 0.017 | 0.006 |
| Silver | 0.028 | 0.012 |
| Zinc | 0.099 | 0.042 |
| Manganese | 0.046 | 0.020 |
(3) Subpart G—Zinc Oxide Formed Anodes—PSES.