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 Code of Federal Regulations (Last Updated: November 8, 2024)
 Title 40 - Protection of Environment
 Chapter I - Environmental Protection Agency
 SubChapter N - Effluent Guidelines and Standards
 Part 420 - Iron and Steel Manufacturing Point Source Category
 Subpart L - Hot Coating Subcategory

  § 420.124 - New source performance standards (NSPS).  

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  • § 420.124 New source performance standards (NSPS).

    The discharge of wastewater pollutants from any new source subject to this subpart shall not exceed the standards set forth below.

    (a) Galvanizing, terne coating and other coatings -

    (1) Strip, sheet, and miscellaneous products.

    Subpart L

    Pollutant or pollutant property New source performance standards
    Maximum for any 1 day Average of daily values for 30 consecutive days
    Kg/kkg (pounds per 1,000 lb) of product
    TSS 0.0438 0.0188
    O&G 0.0188 0.00626
    Lead 0.000282 0.0000939
    Zinc 0.000376 0.000125
    Chromium (hexavalent)1 0.0000376 0.0000125
    pH (2) (2)

    1 The limitations for hexavalent chromium shall be applicable only to galvanizing operations which discharge wastewaters from the chromate rinse step.

    2 Within the range of 6.0 to 9.0.

    (2) [Reserved]

    (b) Galvanizing and other coatings -

    (1) Wire products and fasteners.

    Subpart L

    Pollutant or pollutant property New source performance standards
    Maximum for any 1 day Average of daily values for 30 consecutive days
    Kg/kkg (pounds per 1,000 lb) of product
    TSS 0.175 0.0751
    O&G 0.0751 0.0250
    Lead 0.00113 0.000376
    Zinc 0.00150 0.000500
    Chromium (hexavalent)1 0.000150 0.0000501
    pH (1) (1)

    1 The limitations for hexavalent chromium shall be applicable only to galvanizing operations which discharge wastewaters from the chromate rinse step.

    2 Within the range of 6.0 to 9.0.

    (2) [Reserved]

    (c) Fume scrubbers.

    Subpart L

    New source performance standards Pollutant or pollutant property
    Maximum for any 1 day Average of daily values for 30 consecutive days
    kg/per day
    TSS 5.72 2.45
    O&G 2.45 0.819
    Lead 0.0368 0.0123
    Zinc 0.0491 0.0164
    Chromium (hexavalent)1 0.00490 0.00163
    pH (2) (2)

    1 The limitations for hexavalent chromium shall be applicable only to galvanizing operations which discharge wastewaters from the chromate rinse step.

    2 Within the range of 6.0 to 9.0.

    The above limitations shall be applicable to each fume scrubber associated with any of the coating operations specified above.

    [47 FR 23284, May 27, 1982, as amended at 49 FR 21036, May 17, 1984]