mg/off-kg (pounds per million off-pounds) of precious metal and base metal pressure bonded mg/off-kg (pounds per million off-pounds) of precious metals cast by the semicontinuous or continuous method Cadmium 0.350 0.155 (n) Surface treatment spent baths. (i) Stationary casting contact cooling water-Subpart D-PSNS. There shall be no discharge of process wastewater pollutants. (j) Direct chill casting contact cooling water. mg/off-kg (pounds per million off-pounds) of precious Cadmium 0.001 0.0005 mg/off-kg (pounds per million off-pounds) of precious metals and base metal cleaned prior to bonding Cadmium Copper Cyanide Silver mg/off-kg (pounds per million off-pounds) of precious Cadmium 0.033 0.015 0.097 0.012 0.017 (s) Tumbling or burnishing wastewater. $ 471.51 Effluent limitations rep resenting 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) Rolling spent neat oils and graphite based lubricants—Subpart E-BPT. There shall be no discharge of process wastewater pollutants. (b) Rolling spent emulsions. (t) Sawing or grinding spent neat oils-Subpart D-PSNS. There shall be no discharge of process wastewater pollutants. (u) Sawing or grinding spent emulsions. SUBPART D-PSNS |
