40 CFR 471.44: Pretreatment standards for existing sources (PSES).

Except as provided in 40 CFR 403.7 and 403.13, any existing source subject to this subpart which introduces pollutants into a publicly owned treatment works must comply with 40 CFR part 403 and by August 23, 1985 achieve the following pretreatment standards for existing sources (PSES). The mass of wastewater pollutants in precious metals forming process wastewater introduced into a POTW shall not exceed the following values:

(a) Rolling spent neat oils—subpart D—PSES. There shall be no discharge of process wastewater pollutants.

(b) Rolling spent emulsions.

Subpart D—PSES

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

(c) Drawing spent neat oils—subpart D—PSES. There shall be no discharge of process wastewater pollutants.

(d) Drawing spent emulsions.

Subpart D—PSES

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 0.016 0.007

Copper 0.091 0.048

Cyanide 0.014 0.006

Silver 0.020 0.008

(e) Drawing spent soap solutions.

Subpart D—PSES

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

(f) Metal powder production atomization wastewater.

Subpart D—PSES

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

(g) Heat treatment contact cooling water.

Subpart D—PSES

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

(h) Semi-continuous and continuous casting contact cooling water.

Subpart D—PSES

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

(i) Stationary casting contact cooling water—subpart D—PSES. There shall be no discharge of process wastewater pollutants.

(j) Direct chill casting contact cooling water.

Subpart D—PSES

Pollutant or pollutant property Maximum for any one 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

(k) Shot casting contact cooling water.

Subpart D—PSES

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

(l) Wet air pollution control scrubber blowdown—subpart D—PSES. There shall be no discharge of process wastewater pollutants.

(m) Pressure bonding contact cooling water.

Subpart D—PSES

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average

mg/off-kg (pounds per million off-pounds) of precious metal 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

(n) Surface treatment spent baths.

Subpart D—PSES

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

(o) Surface treatment rinse.

Subpart D—PSES

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

(p) Alkaline cleaning spent baths.

Subpart D—PSES

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

(q) Alkaline cleaning rinse.

Subpart D—PSES

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 1.12

Cyanide 0.325 0.135

Silver 0.459 0.191

(r) Alkaline cleaning prebonding wastewater.

Subpart D—PSES

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 2.210 1.16

Cyanide 0.337 0.139

Silver 0.476 0.197

(s) Tumbling or burnishing wastewater.

Subpart D—PSES

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 2.300 1.21

Cyanide 0.351 0.145

Silver 0.496 0.206

(t) Sawing or grinding spent neat oils—subpart D—PSES. There shall be no discharge of process wastewater pollutants.

(u) Sawing or grinding spent emulsions.

Subpart D—PSES

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

(v) Degreasing spent solvents—subpart D—PSNS. There shall be no discharge of process wastewater pollutants.