New source performance standards (NSPS).

  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. 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.

Expand Table

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.

Expand Table

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.

Expand Table

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]


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