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
|
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
|
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
|
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
|
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
|
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
|
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
|
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
|
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
|
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
|
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
|
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
|
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
|
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
|
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
|
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
|
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.
Code of Federal Regulations
[50 FR 34270, Aug. 23, 1985; 51 FR 2886, Jan. 22, 1986]
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
|
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
|
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
|
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
|
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
|
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
|
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
|
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
|
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
|
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
|
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
|
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 |
