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Title 40: Protection of Environment
CHAPTER I: ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
SUBCHAPTER N: EFFLUENT GUIDELINES AND STANDARDS
PART 466: PORCELAIN ENAMELING POINT SOURCE CATEGORY
Subpart B: Cast Iron Basis Material Subcategory
466.21 - Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this subpart must achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
(a) There shall be no discharge of process wastewater pollutants from metal preparation operations.
(b) The discharge of process wasterwater pollutants from all porcelain enameling coating operations shall not exceed the values set forth below:
| Pollutant or pollutant Property | Maximum for any 1 day | Maximum for monthly average | ||
| Mg/m2 (pounds per/1million ft 2) of Area Coated | ||||
| Chromium | 0.29 | (0.06) | 0.12 | (0.024) |
| Lead | 0.11 | (0.02) | 0.09 | (0.02) |
| Nickle | 0.98 | (0.02) | 0.7 | (0.15) |
| Zinc | 0.93 | (0.19) | 0.39 | (0.08) |
| Aluminum | 3.16 | (0.65) | 1.29 | (0.27) |
| Iron | 0.86 | (0.18) | 0.44 | (0.09) |
| Oil and grease | 13.86 | (2.84) | 8.32 | (1.71) |
| TSS | 28.42 | (5.82) | 13.86 | (2.84) |
| pH | (1) | (1) | (1) | (1) |
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