New source performance standards (NSPS).

Any new source subject to this subpart must achieve the following new source performance standards (NSPS): (a) Rolling Spent Neat Oils—subpart D—NSPS. There shall be no discharge of process wastewater pollutants. (b) Rolling spent emulsions. Subpart D—NSPS Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) of precious metals rolled with emulsions Cadmium 0.026 0.012 Copper 0.147 0.077 Cyanide 0.023 0.010 Silver 0.032 0.013 Oil and grease 1.54 0.925 TSS 3.16 1.51 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (c) Drawing spent neat oils—subpart D—NSPS. There shall be no discharge of process wastewater pollutants. (d) Drawing spent emulsions. Subpart D—NSPS Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) of precious metals drawn with emulsions Cadmium 0.017 0.007 Copper 0.091 0.048 Cyanide 0.014 0.006 Silver 0.020 0.008 Oil and grease 0.950 0.570 TSS 1.95 0.927 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (e) Drawing spent soap solutions. Subpart D—NSPS Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) of precious metals drawn with soap solutions Cadmium 0.001 0.0005 Copper 0.006 0.003 Cyanide 0.0009 0.0004 Silver 0.002 0.0006 Oil and grease 0.063 0.038 TSS 0.128 0.061 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (f) Metal powder production atomization wastewater. Subpart D—NSPS Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) of precious metals powder wet atomized Cadmium 2.27 1.00 Copper 12.7 6.68 Cyanide 1.94 0.802 Silver 2.74 1.14 Oil and grease 134 80.2 TSS 274 131 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (g) Heat treatment contact cooling water. Subpart D—NSPS Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) of precious metals heat treated Cadmium 0.142 0.063 Copper 0.793 0.417 Cyanide 0.121 0.050 Silver 0.171 0.071 Oil and grease 8.34 5.01 TSS 17.1 8.13 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (h) Semi-continuous and continuous casting contact cooling water. Subpart D—NSPS Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) of precious metals cast by the semi-continuous or continuous method Cadmium 0.350 0.155 Copper 1.96 1.03 Cyanide 0.299 0.124 Silver 0.423 0.175 Oil and grease 20.6 12.4 TSS 42.3 20.1 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (i) Stationary casting contact cooling water—subpart D—NSPS. There shall be no discharge of process wastewater pollutants. (j) Direct chill casting contact cooling water. Subpart D—NSPS Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) of precious metals cast by the direct chill method Cadmium 0.367 0.162 Copper 2.05 1.08 Cyanide 0.313 0.130 Silver 0.443 0.184 Oil and grease 21.6 13.0 TSS 44.3 21.1 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (k) Shot casting contact cooling water. Subpart D—NSPS Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) of precious metals shot cast Cadmium 0.125 0.055 Copper 0.698 0.367 Cyanide 0.107 0.044 Silver 0.151 0.063 Oil and grease 7.34 4.41 TSS 15.1 7.16 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (l) Wet air pollution control scrubber blowdown—subpart D—NSPS. There shall be no discharge of process wastewater pollutants. (m) Pressure bonding contact cooling water. Subpart D—NSPS Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) of precious metals and base metal pressure bonded Cadmium 0.029 0.013 Copper 0.159 0.084 Cyanide 0.024 0.010 Silver 0.034 0.014 Oil and grease 1.67 1.00 TSS 3.43 1.63 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (n) Surface treatment spent baths. Subpart D—NSPS Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) of precious metals surface treated Cadmium 0.033 0.015 Copper 0.183 0.097 Cyanide 0.028 0.012 Silver 0.040 0.017 Oil and grease 1.93 1.16 TSS 3.95 1.88 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (o) Surface treatment rinse. Subpart D—NSPS Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) of precious metals surface treated Cadmium 0.210 0.093 Copper 1.17 0.616 Cyanide 0.179 0.074 Silver 0.253 0.105 Oil and grease 12.3 7.39 TSS 25.3 12.0 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (p) Alkaline cleaning spent baths. Subpart D—NSPS Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) of precious metals alkaline cleaned Cadmium 0.021 0.009 Copper 0.114 0.060 Cyanide 0.018 0.007 Silver 0.025 0.010 Oil and grease 1.20 0.720 TSS 2.46 1.17 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (q) Alkaline cleaning rinse. Subpart D—NSPS Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) of precious metals alkaline cleaned Cadmium 0.381 0.168 Copper 2.13 1.112 Cyanide 0.325 0.135 Silver 0.459 0.191 Oil and grease 22.4 13.5 TSS 45.9 21.9 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (r) Alkaline cleaning pre-bonding wastewater. Subpart D—NSPS Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) of precious metals and base metal cleaned prior to bonding Cadmium 0.400 0.174 Copper 2.21 1.16 Cyanide 0.337 0.139 Silver 0.476 0.197 Oil and grease 23.2 13.9 TSS 47.6 22.6 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (s) Tumbling or burnishing wastewater. Subpart D—NSPS Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) of precious metals tumbled or burnished Cadmium 0.412 0.182 Copper 2.30 1.21 Cyanide 0.351 0.145 Silver 0.496 0.206 Oil and grease 24.2 14.5 TSS 49.6 23.6 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (t) Sawing or grinding spent neat oils—subpart D—NSPS. There shall be no discharge of process wastewater pollutants. (u) Sawing or grinding spent emulsions. Subpart D—NSPS Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) of precious metals sawed or ground with emulsions Cadmium 0.032 0.014 Copper 0.178 0.094 Cyanide 0.027 0.011 Silver 0.038 0.016 Oil and grease 1.87 1.12 TSS 3.83 1.82 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (v) Degreasing spent solvents—subpart D—NSPS. There shall be no discharge of process wastewater pollutants. [50 FR 34270, Aug. 23, 1985; 51 FR 2886, Jan. 22, 1986]