Wis. Admin. Code Department of Natural Resources NR 262.31
Except as provided in 40 CFR 125.30 to 125.32, any existing point source subject to this subcategory shall achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable:
BPT effluent limitations
Maximum for any 1 day | Maximum for monthly average | |||
Pollutant or pollutant property | Metal preparation | Coating operation | Metal preparation | Coating operation |
Metric units-mg/m2 of area processed or coated | ||||
Chromium. | 16.34 | 6.32 | 6.63 | 2.56 |
Lead ...... | 5.84 | 2.26 | 5.06 | 1.96 |
Nickel ..... | 54.85 | 21.21 | 38.9 | 15.04 |
Zinc ...... | 51.73 | 20.01 | 21.79 | 8.43 |
Aluminum. | 176.98 | 68.44 | 72.35 | 27.98 |
Iron ....... | 47.85 | 18.5 | 24.51 | 9.48 |
Oil and grease ..... | 777.92 | 300.84 | 466.76 | 108.5 |
TSS....... | 1594.74 | 616.68 | 777.92 | 300.82 |
pH ........ | (1) | (1) | (1) | (1) |
English units-pounds per 1 million ft2 of area processed or coated | ||||
Chromium. | 3.35 | 1.3 | 1.37 | 0.53 |
Lead ...... | 1.2 | 0.47 | 1.04 | 0.4 |
Nickel ..... | 11.24 | 4.35 | 7.97 | 3.08 |
Zinc ...... | 10.6 | 4.1 | 4.46 | 1.73 |
Aluminum. | 36.25 | 14.02 | 14.82 | 5.73 |
Iron ....... | 9.8 | 3.79 | 5.02 | 1.94 |
Oil and | ||||
grease ..... | 159.33 | 61.61 | 95.6 | 36.97 |
TSS ....... | 326.62 | 126.33 | 159.33 | 61.61 |
pH ........ | (1) | (1) | (1) | (1) |
1Within the range 7.5 to 10.0.
Wis. Admin. Code Department of Natural Resources NR 262.31