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4717.7890 MULTIPLE CHEMICAL HEALTH RISK LIMITS: CANCER.

Subpart 1.

Scope.

To evaluate the risk of cancer from multiple chemicals detected in groundwater, a cancer health risk index must be calculated using the procedure specified in this part.

Subp. 2.

Equation.

To evaluate the risk of cancer from multiple chemicals detected in groundwater, a cancer index must be calculated using the following equation:

Cancer health risk index=C1/cHRL1+C2/cHRL2+...+CN/cHRLN

Where:

A.

CN represents the concentration expressed as µg/L of the first through Nth chemical. In the case of a chemical that is detected but cannot be quantified, CN is determined by acceptable statistical procedures.

B.

cHRLN represents the cancer health risk limit for the first through Nth chemical, as specified in part 4717.7860.

Statutory Authority:

MS s 103H.201

History:

33 SR 1792

Published Electronically:

May 11, 2009

Official Publication of the State of Minnesota
Revisor of Statutes