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------------------------------------------------------------------------
BAT effluent limitations
---------------------------
Average of
Pollutant or pollutant property daily values
Maximum for for 30
any 1 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 wastewater from the chromate
rinse step.
(2) [Reserved]
(b) Galvanizing and other coatings--(1) Wire products and fasteners.
Subpart L------------------------------------------------------------------------
BAT effluent limitations
-------------------------
Average of
Pollutant or pollutant property Maximum daily values
for any 1 for 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------------------------------------------------------------------------
BAT effluent
limitations
------------------------
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 21036, May 17, 1984]