Minnesota Administrative Rules

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.

C_N 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, C_N is determined by acceptable statistical procedures.

B.

cHRL_N 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