Wisconsin Administrative Code
Department of Natural Resources
NR 200-299 - Environmental Protection - Wisconsin Pollutant Discharge Elimination System
Chapter NR 230 - Inorganic chemicals manufacturing
Subchapter XXII - Titanium dioxide
Section NR 230.222 - 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 29
Titanium Dioxide Sulfate Process
|
BPT Effluent Limitations |
||
|
kg/kkg (pounds per 1,000 pounds) of titanium dioxide |
||
|
Pollutant or pollutant property |
Maximum for any 1 day |
Average of daily values for 30 consecutive days |
|
TSS |
140 |
38 |
|
Chromium |
0.48 |
0.21 |
|
Nickel |
0.29 |
0.14 |
|
pH |
(1) |
(1) |
(1) Within the range of 6.0 to 9.0
Table 30
Titanium Dioxide Chloride Process
|
BPT Effluent Limitations |
||
|
kg/kkg (pounds per 1,000 pounds) of titanium dioxide |
||
|
Pollutant or pollutant property |
Maximum for any 1 day |
Average of daily values for 30 consecutive days |
|
TSS |
23 |
6.4 |
|
Chromium |
0.057 |
0.030 |
|
pH |
(1) |
(1) |
(1) Within the range of 6.0 to 9.0
Table 31
Titanium Dioxide Chloride-Ilmenite Process
|
BPT Effluent Limitations |
||
|
kg/kkg (pounds per 1,000 pounds) of titanium dioxide |
||
|
Pollutant or pollutant property |
Maximum for any 1 day |
Average of daily values for 30 consecutive days |
|
TSS |
35 |
9.6 |
|
Chromium |
0.12 |
0.053 |
|
Nickel |
0.072 |
0.035 |
|
pH |
(1) |
(1) |
(1) Within the range of 6.0 to 9.0
