Wisconsin Administrative Code
Department of Natural Resources
NR 200-299 - Environmental Protection Wisconsin Pollutant Discharge Elimination System
Chapter NR 254 - Iron and steel manufacturing
Subchapter VIII - Salt Bath Descaling Subcategory
Section NR 254.082 - Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available
Except as provided in 40 CFR 125.30 to 125.32, any existing point source subject to this subchapter shall achieve the following effluent limitations representing the degree of effluent reduction attainable by application of BPT:
Table 63
Sheet And Plate Batch Oxidizing Salt Bath Descaling
| BPT Effluent Limitations | ||
|
Maximum for any 1 day |
Average of daily values for 30 consecutive days |
|
|
Pollutant or pollutant property |
kg/kkg (pounds per 1,000 pounds) of product |
|
|
TSS |
0.204 |
0.0876 |
|
Chromium |
0.00292 |
0.00117 |
|
Nickel |
0.00263 |
0.000876 |
|
pH |
(1) |
(1) |
(1) Within the range of 6.0 to 9.0
Table 64
Rod And Wire Batch Oxidizing Salt Bath Descaling
| BPT Effluent Limitations | ||
|
Maximum for any 1 day |
Average of daily values for 30 consecutive days |
|
|
Pollutant or pollutant property |
kg/kkg (pounds per 1,000 pounds) of product |
|
|
TSS |
0.123 |
0.0526 |
|
Chromium |
0.00175 |
0.000701 |
|
Nickel |
0.00158 |
0.000526 |
|
pH |
(1) |
(1) |
(1) Within the range of 6.0 to 9.0
Table 65
Pipe And Tube Batch Oxidizing Salt Bath Descaling
| BPT Effluent Limitations | ||
|
Maximum for any 1 day |
Average of daily values for 30 consecutive days |
|
|
Pollutant or pollutant property |
kg/kkg (pounds per 1,000 pounds) of product |
|
|
TSS |
0.496 |
0.213 |
|
Chromium |
0.00709 |
0.00284 |
|
Nickel |
0.00638 |
0.00213 |
|
pH |
(1) |
(1) |
(1) Within the range of 6.0 to 9.0
Table 66
Continuous Oxidizing Salt Bath Descaling
| BPT Effluent Limitations | ||
|
Maximum for any 1 day |
Average of daily values for 30 consecutive days |
|
|
Pollutant or pollutant property |
kg/kkg (pounds per 1,000 pounds) of product |
|
|
TSS |
0.0964 |
0.0413 |
|
Chromium |
0.00138 |
0.000551 |
|
Nickel |
0.00124 |
0.000413 |
|
pH |
(1) |
(1) |
(1) Within the range of 6.0 to 9.0
Table 67
Batch Reducing Salt Bath Descaling
| BPT Effluent Limitations | ||
|
Maximum for any 1 day |
Average of daily values for 30 consecutive days |
|
|
Pollutant or pollutant property |
kg/kkg (pounds per 1,000 pounds) of product |
|
|
TSS |
0.0949 |
0.0407 |
|
Cyanide |
0.00102 |
0.000339 |
|
Chromium |
0.00136 |
0.00542 |
|
Nickel |
0.00122 |
0.000407 |
|
pH |
(1) |
(1) |
(1) Within the range of 6.0 to 9.0
Table 68
Continuous Reducing Salt Bath Descaling
| BPT Effluent Limitations | ||
|
Maximum for any 1 day |
Average of daily values for 30 consecutive days |
|
|
Pollutant or pollutant property |
kg/kkg (pounds per 1,000 pounds) of product |
|
|
TSS |
0.532 |
0.228 |
|
Cyanide |
0.00569 |
0.00190 |
|
Chromium |
0.00759 |
0.00304 |
|
Nickel |
0.00683 |
0.00228 |
|
pH |
(1) |
(1) |
(1) Within the range of 6.0 to 9.0
