Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable (BAT).

  1. Law
  2. CFR 40
  3. Protection of Environment
  4. Environmental Protection Agency
  5. Effluent Guidelines and Standards
  6. Iron and Steel Manufacturing Point Source Category
  7. Hot Coating Subcategory
  8. Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable (BAT).

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§ 420.123 Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable (BAT).

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 available technology economically achievable.

(a) Galvanizing, terne coating and other coatings -

(1) Strip, sheet, and miscellaneous products scrubbers.

Subpart L

Pollutant or pollutant property BAT effluent limitations
Maximum for any 1 day Average of daily values for 30 consecutive days
Kg/kkg (pounds per 1,000 lb) of product
Lead 0.00113 0.000376
Zinc 0.00150 0.000500
Chromium (hexavalent)1 0.000150 0.0000501

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

(2) [Reserved]

(b) Galvanizing and other coatings -

(1) Wire products and fasteners.

Subpart L

Pollutant or pollutant property BAT effluent limitations
Maximum for any 1 day Average of daily values for 30 consecutive days
Kg/kkg (pounds per 1,000 lb) of product
Lead 0.00451 0.00150
Zinc 0.00601 0.00200
Chromium (hexavalent)1 0.000601 0.000200

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

(2) [Reserved]

(c) Fume scrubbers.

Subpart L

Pollutant or pollutant property BAT effluent limitations
Maximum for any 1 day Average of daily values for 30 consecutive days
Kg per day
Lead 0.0368 0.0123
Zinc 0.0491 0.0164
Chromium (hexavalent)1 0.00490 0.00163

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

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]


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