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Officials say courthouse air-quality tests are within EPA/KDHE thresholds; winter sampling recommended

Miami County Board of County Commissioners · August 12, 2026

Summary

Project manager told commissioners that air-quality testing at the courthouse showed readings under EPA and KDHE thresholds and that consultants recommend wintertime air sampling to check for potential vapor intrusion under different barometric conditions.

When asked about the courthouse environmental study, project manager Mattelord said the air-quality testing results were emailed to commissioners and that the engineer would be scheduled to walk the board through the report. He said consultants concluded the readings were within regulatory thresholds and that no immediate personnel relocation was needed. "Really the report gives us the clear now everything's under thresholds for from the EPA and KDHE stand," Mattelord told the commission.

Mattelord said consultants recommended continuing air sampling during winter months because heavier barometric pressure could influence vapor intrusion where the courthouse lacks a vapor barrier. He said that recommendation will be presented with the engineer's review for the commission to decide any follow-up sampling or mitigation steps.

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