Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control 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 Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of copper, nickel, and cobalt in the crushed raw material Copper 0.146 0.077 Nickel 0.148 0.098 Ammonia (as N) 10.260 4.512 Cobalt 0.016 0.007 Total suspended solids 3.157 1.502 pH ( 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 Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of nickel powder washed Copper 0.064 0.034 Nickel 0.065 0.043 Ammonia (as N) 4.515 1.985 Cobalt 0.007 0.003 Total suspended solids 1.389 0.660 pH ( 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 Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of nickel produced Copper 24.120 12.700 Nickel 24.370 16.120 Ammonia (as N) 1,692.000 743.900 Cobalt 2.666 1.143 Total suspended solids 520.500 247.600 pH ( 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 Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of cobalt produced Copper 40.660 21.400 Nickel 41.080 27.180 Ammonia (as N) 2,852.000 1,254.000 Cobalt 4.494 1.926 Total suspended solids 877.300 417.300 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times.