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 XII - Hot Coating Subcategory
Section NR 254.122 - 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 the application of BPT:
Table 197
Strip, Sheet, and Miscellaneous Products Galvanizing, Terne Coating, and Other Coatings
|
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 |
0.175 |
0.0751 |
|
O&G |
0.0751 |
0.0250 |
|
Lead |
0.00113 |
0.000376 |
|
Zinc |
0.00150 |
0.000500 |
|
Hexavalent chro-mium(1) |
0.000150 |
0.0000501 |
|
pH |
(2) |
(2) |
(1) The limitations for hexavalent chromium apply to galvanizing operations which discharge wastewaters from the chromate rinse step.
(2) Within the range of 6.0 to 9.0
Table 198
Wire Products and Fasteners Galvanizing and Other Coatings
|
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 |
0.701 |
0.300 |
|
O&G |
0.300 |
0.100 |
|
Lead |
0.00451 |
0.00150 |
|
Zinc |
0.00601 |
0.00200 |
|
Hexavalent chro-mium(1) |
0.000600 |
0.000200 |
|
pH |
(2) |
(2) |
(1) The limitations for hexavalent chromium apply to galvanizing operations which discharge wastewaters from the chromate rinse step.
(2) Within the range of 6.0 to 9.0
Fume Scrubbers
|
BPT Effluent Limitations |
||
|
Maximum for any 1 day |
Average of daily values for 30 consecutive days |
|
|
Pollutant or pollutant property |
kg per day for each fume scrubber |
|
|
TSS |
38.1 |
16.3 |
|
O&G |
16.3 |
5.45 |
|
Lead |
0.245 |
0.0819 |
|
Zinc |
0.327 |
0.109 |
|
Hexavalent chro-mium(1) |
0.0327 |
0.0109 |
|
pH |
(2) |
(2) |
(1) The limitations for hexavalent chromium apply to galvanizing operations which discharge wastewaters from the chromate rinse step.
(2) Within the range of 6.0 to 9.0
