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7052.0360 METAL CONVERSION FACTORS.

Metal Conversion Factors
Acute Chronic
Arsenic 1.000 1.000
Cadmium* 0.944 0.909
Chromium (III) 0.316 0.860
Chromium (VI) 0.982 0.962
Copper 0.960 0.960
Lead* 0.791 0.791
Mercury 0.85 N/A
Nickel 0.998 0.997
Silver 0.85 N/A
Zinc 0.978 0.986

*Conversion factors for cadmium and lead are hardness dependent. The values shown are for a hardness of 100 mg/L as calcium carbonate (CaCO3). The methods for determining the conversion factors for cadmium and lead given the hardness are as follows:

Cadmium

Acute: Conversion Factor (CF) = 1.136672 - [ln (hardness) (0.041838)]

Chronic: CF = 1.101672 - [ln (hardness) (0.041838)]

Lead

Acute and Chronic: CF = 1.46203 - [ln (hardness) (0.145712)]

Statutory Authority:

MS s 115.03; 115.44

History:

22 SR 1466

Published Electronically:

June 16, 2005