Except as provided in 40 CFR 403.7 and 403.13, any existing source subject to this subpart which introduces pollutants into a publicly owned treatment works must comply with 40 CFR part 403 and achieve the following pretreatment standards for existing sources.
(a) Galvanizing, terne coating and other coatings--(1) Strip, sheet, and miscellaneous products.
Subpart L------------------------------------------------------------------------
Pollutant or pollutant
property
-------------------------
Average of
Pretreatment standards for existing sources Maximum daily values
for any 1 for 30
day consecutive
days------------------------------------------------------------------------
Kg/kkg (pounds per 1,000
lb) of product
-------------Lead.......................................... 0.00113 0.000376Zinc.......................................... 0.00150 0.000500Chromium (hexavalent) \1\..................... 0.000150 0.0000501------------------------------------------------------------------------\1\ The limitations for hexavalent chromium shall be applicable only to
galvanizing operations which discharge wastewaters from the chromate
rinse step.
(2) [Reserved]
(b) Galvanizing and other coatings--(1) Wire products and fasteners.
Subpart L------------------------------------------------------------------------
Pretreatment standards
for existing sources
------------------------
Average of
Pollutant or pollutant property daily
Maximum values for
for any 1 30
day consecutive
days------------------------------------------------------------------------
kg/kkg (pounds per
1,000 lb) of product
-------------Lead........................................... 0.00451 0.00150Zinc........................................... 0.00601 0.00200Chromium (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------------------------------------------------------------------------
Pretreatment standards
for existing sources
------------------------
Average of
Pollutant or pollutant property daily
Maximum values for
for any 1 30
day consecutive
days------------------------------------------------------------------------
Kg per day
-------------Lead........................................... 0.0368 0.0123Zinc........................................... 0.0491 0.0164Chromium (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 21037, May 17, 1984]