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):
Subpart D-BPT
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 | ||
Chromium | 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.
Subpart D-BPT
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 |
Oil and grease | 0.950 | 0.570 |
TSS | 1.95 | 0.926 |
pH | (1) | (1) |
1 Within the range of 7.5 to 10.0 at all times.
Subpart D-BPT
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 | 0.001 | 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.
Subpart D-BPT
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 | 6.70 |
Cyanide | 1.94 | 0.802 |
Silver | 2.70 | 1.14 |
Oil and grease | 134 | 80.2 |
TSS | 274 | 130 |
pH | (1) | (1) |
1 Within the range of 7.5 to 10.0 at all times.
Subpart D-BPT
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
mg/off-kg (pounds per million off-pounds) of extruded precious metals heat treated | ||
Cadmium | 1.42 | 0.626 |
Copper | 7.93 | 4.17 |
Cyanide | 1.21 | 0.501 |
Silver | 1.71 | 0.709 |
Oil and grease | 83.4 | 50.1 |
TSS | 171 | 81.3 |
pH | (1) | (1) |
1 Within the range of 7.5 to 10.0 at all times.
Subpart D-BPT
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 | 3.50 | 1.55 |
Copper | 19.6 | 10.3 |
Cyanide | 2.99 | 1.24 |
Silver | 4.23 | 1.75 |
Oil and grease | 206 | 124 |
TSS | 423 | 209 |
pH | (1) | (1) |
1 Within the range of 7.5 to 10.0 at all times.
Subpart D-BPT
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 | 3.67 | 1.62 |
Copper | 20.5 | 10.8 |
Cyanide | 3.13 | 1.30 |
Silver | 4.43 | 1.84 |
Oil and grease | 216 | 130 |
TSS | 443 | 211 |
pH | (1) | (1) |
1 Within the range of 7.5 to 10.0 at all times.
Subpart D-BPT
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 | 1.25 | 0.551 |
Copper | 6.98 | 3.67 |
Cyanide | 1.07 | 0.441 |
Silver | 1.51 | 0.624 |
Oil and grease | 73.4 | 44.1 |
TSS | 151 | 71.6 |
pH | (1) | (1) |
1 Within the range of 7.5 to 10.0 at all times.
Subpart D-BPT
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.
Subpart D-BPT
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.
Subpart D-BPT
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 | 2.10 | 0.924 |
Copper | 11.7 | 5.16 |
Cyanide | 1.79 | 0.739 |
Silver | 2.53 | 1.05 |
Oil and grease | 123 | 73.9 |
TSS | 253 | 120 |
pH | (1) | (1) |
1 Within the range of 7.5 to 10.0 at all times.
Subpart D-BPT
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 | 1.170 |
pH | (1) | (1) |
1 Within the range of 7.5 to 10.0 at all times.
Subpart D-BPT
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 | 3.81 | 1.68 |
Copper | 21.3 | 11.2 |
Cyanide | 3.25 | 1.35 |
Silver | 4.59 | 1.91 |
Oil and grease | 224 | 135 |
TSS | 459 | 219 |
pH | (1) | (1) |
1 Within the range of 7.5 to 10.0 at all times.
Subpart D-BPT
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 | 3.95 | 1.74 |
Copper | 22.1 | 11.6 |
Cyanide | 3.37 | 1.39 |
Silver | 4.76 | 1.97 |
Oil and grease | 232 | 139 |
TSS | 476 | 226 |
pH | (1) | (1) |
1 Within the range of 7.5 to 10.0 at all times.
Subpart D-BPT
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 | 4.12 | 1.82 |
Copper | 23.0 | 12.1 |
Cyanide | 3.51 | 1.45 |
Silver | 4.96 | 2.06 |
Oil and grease | 242 | 145 |
TSS | 496 | 236 |
pH | (1) | (1) |
1 Within the range of 7.5 to 10.0 at all times.
Subpart D-BPT
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 | 0.039 | 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.
40 C.F.R. §471.41