40 CFR 471.102: 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.