40 CFR 471.43: 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.