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Committee says radon testing in existing school was below EPA guidance; mitigation allowances added to schematic design

Salem High School Building Committee · December 4, 2025

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Summary

A committee member reported that 10 radon samples in the existing Salem High School averaged below EPA guideline levels. The committee plans to carry allowances for increased ventilation in the schematic-design budget and will evaluate a membrane option consistent with the net-zero strategy.

During the Dec. 3 meeting a committee member raised a public concern about radon testing. Rick reported that 10 radon samples taken during the existing-conditions evaluation averaged "well below the EPA guideline, limit," and concluded no immediate action was required for the existing building.

Rick and Margaret discussed possible mitigation steps for the new building site, noting that siting and lower-floor conditions for the new building could present different radon risks. Margaret said the schematic-design budget will include an allowance for increased ventilation as a mitigation measure. She also noted an alternative — a radon membrane — that might be more expensive upfront but could align better with the project's net-zero energy goals by reducing ventilation energy use.

The presenters said they will post the radon-sampling results and mitigation approach on the project FAQ page so residents can find the information.