Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically 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 (BAT): (a) Metal powder production atomization wastewater. Subpart J—BAT Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) of powder wet atomized Copper 9.58 5.04 Cyanide 1.46 0.605 Lead 2.12 1.01 (b) Sizing spent emulsions. Subpart J—BAT Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) or powder sized Copper 0.028 0.015 Cyanide 0.004 0.002 Lead 0.006 0.003 (c) Oil-resin impregnation wastewater—subpart J—BAT. There shall be no discharge of process wastewater pollutants. (d) Steam treatment wet air pollution control scrubber blowdown. Subpart J—BAT Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) of powder metallurgy parts steam treated Copper 1.51 0.792 Cyanide 0.230 0.095 Lead 0.333 0.159 (e) Tumbling, burnishing and cleaning wastewater. Subpart J—BAT Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) or powder metallurgy parts tumbled, burnished, or cleaned Copper 8.36 4.40 Cyanide 1.28 0.528 Lead 1.850 0.880 (f) Sawing or grinding spent neat oils—subpart J—BAT. There shall be no discharge of process wastewater pollutants. (g) Sawing or grinding spent emulsions. Subpart J—BAT Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) of powder metallurgy parts sawed or ground with emulsions Copper 0.0035 0.018 Cyanide 0.005 0.002 Lead 0.008 0.004 (h) Sawing or grinding contact cooling water. Subpart J—BAT Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) of powder sawed or ground with contact cooling Copper 3.08 1.62 Cyanide 0.470 0.195 Lead 0.681 0.324 (i) Hot pressing contact cooling water. Subpart J—BAT Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) of powder cooled after pressing Copper 16.7 8.80 Cyanide 2.55 1.06 Lead 3.70 1.760 (j) Mixing wet air pollution control scrubber blowdown. Subpart J—BAT Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) of powder mixed Copper 15.0 7.90 Cyanide 2.29 0.948 Lead 3.32 1.58 (k) Degreasing spent solvents—subpart J—BAT. There shall be no discharge of process wastewater pollutants. [50 FR 34270, Aug. 23, 1985; 51 FR 2889, Jan. 22, 1986]