Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology 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 for the process operations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT): (a) Metal powder production atomization wastewater. Subpart J—BPT 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 Oil and grease 101 60.5 TSS 207 98.3 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (b) Sizing spent emulsion. Subpart J—BPT Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) of powder sized Copper 0.028 0.015 Cyanide 0.004 0.002 Lead 0.006 0.003 Oil and grease 0.292 0.175 TSS 0.599 0.285 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (c) Oil-resin impregnation wastewater—subpart J—BPT. There shall be no discharge of process wastewater pollutants. (d) Steam treatment wet air pollution control scrubber blowdown. Subpart J—BPT Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) of power metallurgy parts steam treated Copper 1.51 0.792 Cyanide 0.230 0.095 Lead 0.333 0.159 Oil and grease 15.9 9.51 TSS 32.5 15.5 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (e) Tumbling, burnishing and cleaning wastewater. Subpart J—BPT 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 tumbled, burnished, or cleaned Copper 8.36 4.40 Cyanide 1.28 0.528 Lead 1.85 0.880 Oil and grease 88.0 52.800 TSS 181 85.8 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (f) Sawing or grinding spent neat oils—subpart J—BPT. There shall be no discharge of process wastewater pollutants. (g) Sawing or grinding spent emulsion. Subpart J—BPT 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 emulsion Copper 0.035 0.018 Cyanide 0.005 0.002 Lead 0.008 0.004 Oil and grease 0.362 0.217 TSS 0.742 0.353 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (h) Sawing or grinding contact cooling water. Subpart J—BPT 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 contact cooling Copper 3.08 1.62 Cyanide 0.470 0.195 Lead 0.681 0.324 Oil and grease 32.4 19.5 TSS 66.4 31.6 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (i) Hot pressing contact cooling water. Subpart J—BPT 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 1.76 Oil and grease 176 106 TSS 361 172 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (j) Mixing wet air pollution control scrubber blowdown. Subpart J—BPT 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 Oil and grease 158 94.8 TSS 324 154 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (k) Degreasing spent solvents—subpart J—BPT. There shall be no discharge of process wastewater pollutants. [50 FR 34270, Aug. 23, 1985; 51 FR 2889, Jan. 22, 1986]