The Minnesota Department of Health (MDH) re-evaluates all human health risk guidance values developed since 2008 on a routine basis to keep existing health-based guidance values up to date with the most recent MDH risk assessment methodology and the available science. Incorporating new data and updating methodology can result in changes to existing guidance values or result in a recommendation for a more in-depth review.
Re-evaluations of seven contaminants with existing MDH guidance values are planned for the 2018 calendar year. The contaminants are:
• Metolachlor ESA (already completed)
• Metoloachlor OXA
• Benzene
• Toluene
• Xylenes
• 1,1-Dichloroethylene
• Ethylbenzene
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