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) Rolling spent neat oils and graphite based lubricants—subpart E—BAT. There shall be no discharge of process wastewater pollutants. (b) Rolling spent emulsions. Subpart E—BAT Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) of refractory metals rolled with emulsions Copper 0.549 0.262 Nickel 0.236 0.157 Fluoride 25.5 11.3 Molybdenum 2.16 0.957 (c) Drawing spent lubricants—subpart E—BAT. There shall be no discharge of process wastewater pollutants. (d) Extrusion spent lubricants—subpart E—BAT. There shall be no discharge of process wastewater pollutants. (e) Extrusion press hydraulic fluid leakage. Subpart E—BAT Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) of refractory metals extruded Copper 1.5 0.730 Nickel 0.650 0.440 Fluoride 71.000 31.0 Molybdenum 5.99 2.66 (f) Forging spent lubricants—subpart E—BAT. There shall be no discharge of process wastewater pollutants. (g) Forging contact cooling water. Subpart E—BAT Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) of forged refractory metals cooled with water Copper 0.041 0.020 Nickel 0.018 0.012 Fluoride 1.92 0.853 Molybdenum 0.163 0.072 (h) Equipment cleaning wastewater. Subpart E—BAT Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) of refractory metals formed Copper 0.174 0.083 Nickel 0.075 0.051 Fluoride 8.09 3.59 Molybdenum 0.684 0.303 (i) Metal powder production wastewater. Subpart E—BAT Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) of refractory metals powder produced Copper 0.360 0.172 Nickel 0.155 0.104 Fluoride 16.7 7.42 Molybdenum 1.42 0.627 (j) Metal powder production floor wash wastewater—subpart E—BAT. There shall be no discharge of process wastewater pollutants. (k) Metal powder pressing spent lubricants—subpart E—BAT. There shall be no discharge of process wastewater pollutants. (l) Surface treatment spent baths. Subpart E—BAT Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) of refractory metals surface treated Copper 0.498 0.237 Nickel 0.214 0.144 Fluoride 23.2 10.3 Molybdenum 1.96 0.868 (m) Surface treatment rinse. Subpart E—BAT Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) of refractory metals surface treated Copper 15.5 7.38 Nickel 6.66 4.48 Fluoride 720 320 Molybdenum 60.9 27.0 (n) Alkaline cleaning spent baths. Subpart E—BAT Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) of refractory metals alkaline cleaned Copper 0.428 0.204 Nickel 0.184 0.124 Fluoride 19.9 8.82 Molybdenum 1.68 0.745 (o) Alkaline cleaning rinse. Subpart E—BAT Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) of refractory metals alkaline cleaned Copper 10.5 4.98 Nickel 4.49 3.02 Fluoride 486 216 Molybdenum 41.1 18.2 (p) Molten salt rinse. Subpart E—BAT Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) of refractory metals treated with molten salt Copper 0.810 0.386 Nickel 0.348 0.234 Fluoride 37.7 16.7 Molybdenum 3.19 1.41 (q) Tumbling or burnishing wastewater. Subpart E—BAT Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) of refractory metals tumbled or burnished Copper 1.60 0.763 Nickel 0.688 0.463 Fluoride 74.4 33.0 Molybdenum 6.29 2.79 (r) Sawing or grinding spent neat oils—subpart E—BAT. There shall be no discharge of process wastewater pollutants. (s) Sawing or grinding spent emulsions. Subpart E—BAT Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) of refractory metals sawed or ground with emulsions Copper 0.380 0.181 Nickel 0.164 0.110 Fluoride 17.7 7.84 Molybdenum 1.50 0.663 (t) Sawing or grinding contact cooling water. Subpart E—BAT Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) of refractory metals sawed or ground with contact cooling water Copper 3.11 1.48 Nickel 1.34 0.899 Fluoride 145.0 64.2 Molybdenum 12.2 5.42 (u) Sawing or grinding rinse. Subpart E—BAT Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) of sawed or ground refractory metals rinsed Copper 0.018 0.009 Nickel 0.008 0.005 Fluoride 0.803 0.357 Molybdenum 0.068 0.030 (v) Wet air pollution control scrubber blowdown. Subpart E—BAT Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) of refractory metals sawed, surface coated or surface treated Copper 1.01 0.480 Nickel 0.433 0.291 Fluoride 46.8 20.8 Molybdenum 3.96 1.76 (w) Miscellaneous wastewater sources. Subpart E—BAT Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) of refractory metals formed Copper 0.442 0.211 Nickel 0.190 0.128 Fluoride 20.6 9.11 Molybdenum 1.74 0.770 (x) Dye penetrant testing wastewater. Subpart E—BAT Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) of refractory metals product tested Copper 0.100 0.048 Nickel 0.043 0.029 Fluoride 4.62 2.05 Molybdenum 0.391 0.173 (y) Degreasing spent solvents—subpart E—BAT. There shall be no discharge of process wastewater pollutants. [50 FR 34270, Aug. 23, 1985; 51 FR 2886, Jan. 22, 1986]