Commercial applications of radon mitigation techniques.
The Human Equation: Health and Comfort. Proceedings of the ASHRAE/SOEH Conference, IAQ 89, April 17-20, 1989, San Diego, California, American Society of Heating, Refrigerating, and Air-Conditioning Engineers, Inc., Atlanta, Georgia 1989:143-145
Following a self conducted radon (10043922) test by a large corporation, additional testing was conducted which indicated further evaluation was needed by a radon remediation company. The two story building was partially built into a bank of earth and had been constructed in 1955 of 12 inch concrete blocks. It measured 118 feet long and 36 feet wide having 6600 square feet of interior space. There was also a 1500 foot slab/on/grade conference room. No central forced heating or air conditioning existed, with heating from baseboard radiation and the air conditioning consisting of window units. In the laboratory areas there were no fume hoods. As a pressure field could not be developed, remediation had to be through wall ventilation. Channel venting was ruled out due to the large research equipment obstructing the path that could not be disturbed. The only alternative was block wall ventilation on a large scale. A foam insulation contractor foamed the course of block 7 feet from the floor around the entire exterior of the building, as well as the center interior partition. All block cores were drilled and all other entry routes were sealed. The appropriate number of suction points and fans needed was then determined. Cost became a factor at this point so three wall depressurization systems were installed and a pressurization system was installed for the area under the conference room slab. All testing, diagnostic evaluations and subsequent remediation cost the consumer 21,000 dollars, with the foam insulation work costing the contractor 2,400 dollars. It took five men 5 days to install the four systems as well as the sealing process, and roughly two men 2 days for the diagnostic time.
NIOSH-Contract; Radon-daughters; Closed-building-syndrome; Ventilation-systems; Air-quality-control; Control-technology; Air-quality-monitoring
Control Technology and Personal Protective Equipment; Research Tools and Approaches; Control-technology
The Human Equation: Health and Comfort. Proceedings of the ASHRAE/SOEH Conference, IAQ 89, April 17-20, 1989, San Diego, California, American Society of Heating, Refrigerating, and Air-Conditioning Engineers, Inc., Atlanta, Georgia