technology currently available.
Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this subpart shall achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable technology currently available:
(a) Raw Material dust control.
BPT Limitations for the Primary Nickel and Cobalt Subcategory------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/kg (pounds per
million pounds) of
copper, nickel, and
cobalt in the crushed
raw material
--------------
Copper........................................ 0.146 0.077Nickel........................................ 0.148 0.098Ammonia (as N)................................ 10.260 4.512Cobalt........................................ 0.016 0.007Total suspended solids........................ 3.157 1.502pH............................................ (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range of 7.5 to 10.0 at all times.
(b) Nickel wash water.
BPT Limitations for the Primary Nickel and Cobalt Subcategory------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/kg (pounds per
million pounds) of
nickel powder washed
--------------Copper........................................ 0.064 0.034
Nickel........................................ 0.065 0.043Ammonia (as N)................................ 4.515 1.985Cobalt........................................ 0.007 0.003Total suspended solids........................ 1.389 0.660pH............................................ (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range of 7.5 to 10.0 at all times.
(c) Nickel reduction decant.
BPT Limitations for the Primary Nickel and Cobalt Subcategory------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/kg (pounds per
million pounds) of
nickel produced
--------------Copper........................................ 24.120 12.700Nickel........................................ 24.370 16.120Ammonia (as N)................................ 1,692.000 743.900Cobalt........................................ 2.666 1.143Total suspended solids........................ 520.500 247.600pH............................................ (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range of 7.5 to 10.0 at all times.
(d) Cobalt reduction decant.
BPT Limitations for the Primary Nickel and Cobalt Subcategory------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/kg (pounds per
million pounds) of
cobalt produced
--------------Copper........................................ 40.660 21.400Nickel........................................ 41.080 27.180Ammonia (as N)................................ 2,852.000 1,254.000Cobalt........................................ 4.494 1.926Total suspended solids........................ 877.300 417.300pH............................................ (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range of 7.5 to 10.0 at all times.