currently available (BPT).
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 practicable control technology currently available.
(a) Galvanizing, terne coating, and other coatings--(1) Strip, sheet, and miscellaneous products.
Subpart L------------------------------------------------------------------------
BPT 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
-------------TSS........................................... 0.175 0.0751O&G...........................................; 0.0751 0.0250Lead.......................................... 0.00113 0.000376Zinc.......................................... 0.00150 0.000500Chromium (hexavalent) \1\..................... 0.000150 0.0000501pH............................................ (\2\) (\2\)------------------------------------------------------------------------\1\ The limitations for hexavalent chromium shall apply 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------------------------------------------------------------------------
BPT effluent
limitations
------------------------
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
-------------TSS............................................ 0.701 0.300O&G............................................; 0.300 0.100Lead........................................... 0.00451 0.00150Zinc........................................... 0.00601 0.00200Chromium (hexavalent) \1\...................... 0.000600 0.000200pH............................................. (\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]
(c) Fume scrubbers.
Subpart L------------------------------------------------------------------------
BPT effluent
limitations
------------------------
Average of
Pollutant or pollutant property daily
Maximum values for
for any 1 30
day consecutive
days------------------------------------------------------------------------
Kg per day
-------------TSS............................................ 38.1 16.3O&G............................................; 16.3 5.45Lead........................................... 0.245 0.0819Zinc........................................... 0.327 0.109
Chromium (hexavalent) \1\...................... 0.0327 0.0109pH............................................. (\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; 47 FR 41739, Sept. 22, 1982, as amended at 49 FR 21036, May 17, 1984]