Title 40
SECTION 471.51
471.51 Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT).
§ 471.51 Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT).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):
(a) Rolling spent neat oils and graphite based lubricants - subpart E - BPT. There shall be no discharge of process wastewater pollutants.
(b) Rolling spent emulsions.
Subpart E - BPT
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/off-kg (pounds per million off-pounds) of refractory metals rolled with emulsions | ||
| Copper | 0.815 | 0.429 |
| Nickel | 0.824 | 0.545 |
| Fluoride | 25.5 | 11.3 |
| Molybdenum | 2.84 | 1.47 |
| Oil and grease | 8.58 | 5.15 |
| TSS | 17.6 | 8.37 |
| pH | ( 1) | ( 1) |
1 Within the range of 7.5 to 10.0 at all times.
(c) Drawing spent lubricants - subpart E - BPT. There shall be no discharge of process wastewater pollutants.
(d) Extrusion spent lubricants - subpart E - BPT. There shall be no discharge of process wastewater pollutants.
(e) Extrusion press hydraulic fluid leakage.
Subpart E - BPT
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/off-kg (pounds per million off-pounds) of refractory metals extruded | ||
| Copper | 2.26 | 1.19 |
| Nickel | 2.29 | 1.51 |
| Fluoride | 70.8 | 31.4 |
| Molybdenum | 7.87 | 4.07 |
| Oil and grease | 23.8 | 14.3 |
| TSS | 48.8 | 23.2 |
| pH | ( 1) | ( 1) |
1 Within the range of 7.5 to 10.0 at all times.
(f) Forging spent lubricants - subpart E - BPT. There shall be no discharge of process wastewater pollutants.
(g) Forging contact cooling water.
Subpart E - BPT
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/off-kg (pounds per million off-pounds) of forged refractory metals cooled with water | ||
| Copper | 0.614 | 0.323 |
| Nickel | 0.620 | 0.410 |
| Fluoride | 19.2 | 8.53 |
| Molybdenum | 2.14 | 1.11 |
| Oil and grease | 6.46 | 3.88 |
| TSS | 13.3 | 6.30 |
| pH | ( 1) | ( 1) |
1 Within the range of 7.5 to 10.0 at all times.
(h) Equipment cleaning wastewater.
Subpart E - BPT
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/off-kg (pounds per million off-pounds) of refractory metals formed | ||
| Copper | 2.59 | 1.36 |
| Nickel | 2.61 | 1.73 |
| Fluoride | 80.9 | 35.9 |
| Molybdenum | 8.99 | 4.65 |
| Oil and grease | 27.2 | 16.3 |
| TSS | 55.8 | 26.5 |
| pH | ( 1) | ( 1) |
1 Within the range of 7.5 to 10.0 at all times.
(i) Metal powder production wastewater.
Subpart E - BPT
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/off-kg (pounds per million off-pounds) of refractory metals powder produced | ||
| Copper | 0.534 | 0.281 |
| Nickel | 0.540 | 0.357 |
| Fluoride | 16.70 | 7.42 |
| Molybdenum | 1.86 | 0.961 |
| Oil and grease | 5.62 | 3.37 |
| TSS | 11.5 | 5.48 |
| pH | ( 1) | ( 1) |
1 Within the range of 7.5 to 10.0 at all times.
(j) Metal powder production floor wash wastewater - subpart E - BPT. There shall be no discharge of process wastewater pollutants.
(k) Metal powder pressing spent lubricants - subpart E - BPT. There shall be no discharge of process wastewater pollutants.
(l) Surface treatment spent baths.
Subpart E - BPT
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/off-kg (pounds per million off-pounds) of refractory metals surface treated | ||
| Copper | 0.739 | 0.389 |
| Nickel | 0.747 | 0.494 |
| Fluoride | 23.2 | 10.3 |
| Molybdenum | 2.57 | 1.33 |
| Oil and grease | 7.78 | 4.68 |
| TSS | 16.0 | 7.59 |
| pH | ( 1) | ( 1) |
1 Within the range of 7.5 to 10.0 at all times.
(m) Surface treatment rinse.
Subpart E - BPT
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/off-kg (pounds per million off-pounds) of refractory metals surface treated | ||
| Copper | 230 | 121 |
| Nickel | 232 | 154 |
| Fluoride | 7,200 | 3,200 |
| Molybdenum | 800 | 414 |
| Oil and grease | 2,420 | 1,450 |
| TSS | 4,960 | 2,360 |
| pH | ( 1) | ( 1) |
1 Within the range of 7.5 to 10.0 at all times.
(n) Alkaline cleaning spent baths.
Subpart E - BPT
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/off-kg (pounds per million off-pounds) of refractory metals alkaline cleaned | ||
| Copper | 0.635 | 0.334 |
| Nickel | 0.641 | 0.424 |
| Fluoride | 19.9 | 8.82 |
| Molybdenum | 2.21 | 1.14 |
| Oil and grease | 6.68 | 4.01 |
| TSS | 13.7 | 6.51 |
| pH | ( 1) | ( 1) |
1 Within the range of 7.5 to 10.0 at all times.
(o) Alkaline cleaning rinse.
Subpart E - BPT
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/off-kg (pounds per million off-pounds) of refractory metals alkaline cleaned | ||
| Copper | 1,550 | 816 |
| Nickel | 1,570 | 1,040 |
| Fluoride | 48,600 | 21,600 |
| Molybdenum | 5,400 | 2,790 |
| Oil and grease | 16,300 | 9,790 |
| TSS | 33,500 | 15,900 |
| pH | ( 1) | ( 1) |
1 Within the range of 7.5 to 10.0 at all times.
(p) Molten salt rinse.
Subpart E - BPT
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/off-kg (pounds per million off-pounds) of refractory metals treated with molten salt | ||
| Copper | 12.1 | 6.33 |
| Nickel | 12.2 | 8.04 |
| Fluoride | 377 | 167 |
| Molybdenum | 41.9 | 21.7 |
| Oil and grease | 127 | 76.0 |
| TSS | 260 | 124 |
| pH | ( 1) | ( 1) |
1 Within the range of 7.5 to 10.0 at all times.
(q) Tumbling or burnishing wastewater.
Subpart E - BPT
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/off-kg (pounds per million off-pounds) of refractory metals tumbled or burnished | ||
| Copper | 23.8 | 12.5 |
| Nickel | 24.0 | 15.9 |
| Fluoride | 744 | 330 |
| Molybdenum | 82.7 | 42.8 |
| Oil and grease | 250 | 150 |
| TSS | 513 | 244 |
| pH | ( 1) | ( 1) |
Within the range of 7.5 to 10.0 at all times.
(r) Sawing or grinding spent neat oils - subpart E - BPT. There shall be no discharge of process wastewater pollutants.
(s) Sawing or grinding spent emulsions.
Subpart E - BPT
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/off-kg (pounds per million off-pounds) of refractory metals sawed or ground with emulsions | ||
| Copper | 0.565 | 0.297 |
| Nickel | 0.570 | 0.377 |
| Fluoride | 17.7 | 7.84 |
| Molybdenum | 1.97 | 1.02 |
| Oil and grease | 5.94 | 3.57 |
| TSS | 12.2 | 5.79 |
| pH | ( 1) | ( 1) |
1 Within the range of 7.5 to 10.0 at all times.
(t) Sawing or grinding contact cooling water.
Subpart E - BPT
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/off-kg (pounds per million off-pounds) of refractory metals sawed or ground with contact cooling water | ||
| Copper | 46.2 | 24.3 |
| Nickel | 46.7 | 30.9 |
| Fluoride | 1450 | 642 |
| Molybdenum | 161 | 83.1 |
| Oil and grease | 486 | 292 |
| TSS | 997 | 474 |
| pH | ( 1) | ( 1) |
1 Within the range of 7.5 to 10.0 at all times.
(u) Sawing or grinding rinse.
Subpart E - BPT
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/off-kg (pounds per million off-pounds) of sawed or ground refractory metals rinsed | ||
| Copper | 0.257 | 0.135 |
| Nickel | 0.259 | 0.172 |
| Fluoride | 8.03 | 3.57 |
| Molybdenum | 0.893 | 0.462 |
| Oil and grease | 2.70 | 1.62 |
| TSS | 5.54 | 2.63 |
| pH | ( 1) | ( 1) |
1 Within the range of 7.5 to 10.0 at all times.
(v) Wet air pollution control scrubber blowdown.
Subpart E - BPT
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/off-kg (pounds per million off-pounds) of refractory metals sawed or ground, surface coated or surface treated | ||
| Copper | 1.50 | 0.787 |
| Nickel | 1.51 | 1.00 |
| Fluoride | 46.8 | 20.8 |
| Molybdenum | 5.20 | 2.69 |
| Oil and grease | 15.8 | 9.45 |
| TSS | 32.3 | 15.4 |
| pH | ( 1) | ( 1) |
1 Within the range of 7.5 to 10.0 at all times.
(w) Miscellaneous wastewater sources.
Subpart E - BPT
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/off-kg (pounds per million off-pounds) of refractory metals formed | ||
| Copper | 0.656 | 0.345 |
| Nickel | 0.663 | 0.438 |
| Fluoride | 20.6 | 9.11 |
| Molybdenum | 2.28 | 1.18 |
| Oil and grease | 6.9 | 4.14 |
| TSS | 14.2 | 6.73 |
| pH | ( 1) | ( 1) |
1 Within the range of 7.5 to 10.0 at all times.
(x) Dye penetrant testing wastewater.
Subpart E - BPT
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/off-kg (pounds per million off-pounds) of refractory metals tested | ||
| Copper | 0.150 | 0.078 |
| Nickel | 0.150 | 0.099 |
| Fluoride | 4.60 | 2.00 |
| Molybdenum | 0.513 | 0.266 |
| Oil and grease | 1.60 | 0.930 |
| TSS | 3.20 | 1.50 |
| pH | ( 1) | ( 1) |
1 Within the range of 7.5 to 10.0 at all times.
(y) Degreasing spent solvents - subpart E - BPT. There shall be no discharge of process wastewater pollutants.
[50 FR 34270, Aug. 23, 1985; 51 FR 2886, Jan. 22, 1986]