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RADON MITIGATION IN SCHOOLS: CASE STUDIES OF RADON MITIGATION SYSTEMS INSTALLED BY EPA IN FOUR MARYLAND SCHOOLS ARE PRESENTED
Leovic, K, A Craig*, AND D. Saum. RADON MITIGATION IN SCHOOLS: CASE STUDIES OF RADON MITIGATION SYSTEMS INSTALLED BY EPA IN FOUR MARYLAND SCHOOLS ARE PRESENTED. ASHRAE JOURNAL 32(2):20-25, (1990).
The first part of this two-part paper discusses radon entry into schools, radon mitigation approaches for schools, and school characteristics (e.g., heating, ventilation, and air-conditioning -- HVAC-- system design and operation) that influence radon entry and mitigation system design. he second part discusses specific mitigation systems that were installed by the U.S. EPA in four Maryland schools. VAC systems in schools vary considerably and tend to have a greater impact on pressure differentials -- and consequently on radon levels -- than do heating and air conditioning systems in houses. f the HVAC system induces a negative pressure relative to the subsIab area, radon can be "pulled" into the building. f the HVAC system pressurizes the building, it can prevent radon entry as long as the fan is running. owever, school HVAC systems are normally set back or turned off on evenings and weekends and, even if the HVAC system pressurizes the school during operations indoor radon levels may build up during the setback periods. he primary mode of radon entry into a school with significantly elevated radon levels is normally from soil gas that is drawn in by pressure differentials between the soil surrounding the substructure and the building interior. Copy available at NTIS as PB90219700.