What happens when the risk estimate for a facility exceeds the inhalation health benchmark?
The quantitative threshold of 1.0 for acute and chronic risk and 1/100,000 for cancer risks is not a regulatory “bright line.” Potential calculated risks under these guidelines suggest a very low probability of the health endpoint assessed, however estimated risks above these guidelines do not guarantee health effects. This is a guideline that allows risk assessors and risk managers to determine whether or not further analysis is necessary or if mitigation should be considered. If a facility’s initial AERA assessment shows that a risk that is greater than a quantitative, or Risk Assessment Screening Spreadsheet (RASS), guideline the facility may consider refinements in the toxicity assessment, modeling or emission estimates. This may include fully refined dispersion modeling, limited hours of operation, or separation by health endpoint. If an AERA is submitted with refinements and risk estimates are still significantly above risk guidelines, the MPCA will meet with the project proposer
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- What happens when the risk estimate for a facility exceeds the inhalation health benchmark?
