Wisconsin Administrative Code
Department of Natural Resources
NR 200-299 - Environmental Protection Wisconsin Pollutant Discharge Elimination System
Chapter NR 274 - Nonferrous metals manufacturing
Subchapter XIX - Secondary Indium
Section NR 274.194 - New source performance standards

Universal Citation: WI Admin Code ยง NR 274.194
Current through August 26, 2024

Any new source subject to this subchapter shall achieve the following standards:

Table 19-1

Secondary Indium Displacement Supernatant

NSPS

Maximum for any 1 day

Maximum for monthly average

Pollutant or pollutant property

mg/kg (pounds per million pounds) of indium metal produced

Cadmium

2.105

0.929

Lead

2.600

1.238

Zinc

9.037

3.776

Indium

2.724

1.114

Total suspended solids

253.800

120.700

pH

(1)

(1)

(1) Within the range of 7.5 to 10.0 at all times.

Table 19-2

Secondary Indium Spent Electrolyte

NSPS

Maximum for any 1 day

Maximum for monthly average

Pollutant or pollutant property

mg/kg (pounds per million pounds) of cathode indium produced

Cadmium

12.170

5.370

Lead

15.040

7.160

Zinc

52.270

21.840

Indium

15.750

6.444

Total suspended solids

1,468.000

698.100

pH

(1)

(1)

(1) Within the range of 7.5 to 10.0 at all times.

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