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 230.226 - Pretreatment standards for new sources
Except as provided in s. NR 211.13, any new source subject to this subchapter which introduces pollutants into a POTW shall comply with ch. NR 211 and shall achieve the following PSNS:
Table 34-A
Titanium Dioxide Chloride Process(1)
|
PSNS |
||
|
milligrams per liter |
||
|
Pollutant or |
Maximum for |
Average of daily values |
|
pollutant property |
any 1 day |
for 30 consecutive days |
|
Iron |
8.5 |
2.5 |
|
Chromium |
0.57 |
0.30 |
|
Nickel |
0.38 |
0.20 |
(1) When a POTW finds that mass limitations are necessary, the PSNS shall be the standards set forth in s. NR 230.224 for chromium, iron, and nickel.
Table 35
Titanium Dioxide Chloride Process(1)
|
PSNS |
||
|
milligrams per liter |
||
|
Pollutant or |
Maximum for any 1 |
Average of daily values for 30 |
|
pollutant property |
day |
consecutive days |
|
Iron |
5.3 |
1.6 |
|
Chromium |
0.23 |
0.12 |
(1) When a POTW finds that mass limitations are necessary, the PSNS shall be the standards set forth in s. NR 230.224 for chromium, iron, and nickel.
Table 36
Titanium Dioxide Chloride-Ilmenite Process(1)
|
PSNS |
||
|
milligrams per liter |
||
|
Pollutant or |
Maximum for |
Average of daily values |
|
pollutant property |
any 1 day |
for 30 consecutive days |
|
Iron |
5.3 |
1.6 |
|
Chromium |
0.23 |
0.12 |
|
Nickel |
0.33 |
0.17 |
(1) When a POTW finds that mass limitations are necessary, the PSNS shall be the standards set forth in s. NR 230.224 for chromium, iron, and nickel.
