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Francis Howell North: monitors, smoke tests and rooftop vent redesign planned to stop sewer‑gas odors
Summary
Contractors and district staff reported progress identifying plumbing breaks and installing air monitors at Francis Howell North and said they will relocate rooftop plumbing vents and complete repairs before school starts to prevent sewer‑gas odor from re‑entering the building.
Contractors and district staff reported steps this month to find and fix sources of a persistent noxious odor at Francis Howell North, including installation of continuous air monitors, smoke testing to locate plumbing breaks, and a planned rooftop vent redesign to keep sewer gas from being drawn back into air handlers.
Kevin Roberts, the consultant responsible for air monitoring, told the board the district has installed 10 telemetry monitors that take readings every second and reported “no detections of hydrogen sulfide” and no readings above lower‑explosive‑limit thresholds; brief elevated volatile organic compound readings were attributed to floor‑stripping and waxing activities and to propane‑powered machines, Roberts said. "Oxygen has…
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