Minnesota Administrative Rules
Agency 144 - Health Department
Chapter 4717 - ENVIRONMENTAL HEALTH
HEALTH RISK VALUES
Part 4717.8350 - EQUATION FOR CALCULATION OF MHRV FOR NONCARCINOGENIC EFFECTS OF TOXICANTS
Universal Citation: MN Rules 4717.8350
Current through Register Vol. 48, No. 39, March 25, 2024
Subpart 1. Scope.
This part establishes the method for determining the multimedia health risk value (MHRV) for a noncarcinogenic effect of a toxicant emitted to the air.
Subp. 2. Equation for MHRV for noncarcinogenic effect of toxicant.
The equation for calculating a MHRV for a noncarcinogenic effect of a toxicant is:
| NOAEL or LOAEL or BMD | ||
| MHRV = | -------------------------------------------------- | X 1,000 |
| (Uncertainty factor) (Modifying factor) |
Where:
A. MHRV is
expressed in units of micrograms of chemical or defined mixture of chemicals
per kilogram of body weight per day ( µg/kg-day);
B. NOAEL, LOAEL, or BMD is expressed in units
of milligrams of chemical or defined mixture of chemicals per kilogram body
weight per day (mg/kg-day);
C.
uncertainty factor and modifying factor are unitless;
D. the default value for modifying factor is
one unless otherwise specified in part
4717.8250; and
E. 1,000 is a factor to convert milligrams to
micrograms.
Statutory Authority: MS s 144.12
Disclaimer: These regulations may not be the most recent version. Minnesota may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.
This site is protected by reCAPTCHA and the Google
Privacy Policy and
Terms of Service apply.
