- $1.02 billion state-of-the-art medical center located in southern California
- New 600+ bed facility opened in fall 2008
- Rooftop air intakes located near emergency transport helipad
In the fall of 2008, one of the busiest public hospitals in the western United States opened a new medical center complex. Shortly after its opening, employees began complaining about poor indoor air quality. Exhaust fumes from the rooftop helipad landings set off fire alarms and caused odors within the hospital.
The medical center’s air handling units (AHUs), with outdoor air intakes, are located in the vicinity of the helipad. The air intake vents circulate air throughout the medical center’s diagnostic and treatment tower, which houses emergency and operating rooms. A standard gas-phase filtration system was in place to remove odorous chemical contaminants, such as helicopter exhaust, but failed to provide sufficient protection for the facility’s patients and staff.
After several months of working with the filter manufacturer to find a solution for the failing filtration system, the medical center closed the helipad in early February 2009. Within a few weeks, the State’s Division of Occupational Safety and Health (DOSH) fined the medical center after validating employees’ claims of poor air quality. The problem became so prominent that a local newspaper reported the issue and followed it until the helipad was reopened.
The AAF International Solution
AAF International was contacted to provide an on-site assessment of the affected rooftop AHUs to obtain a viable solution for the medical center.
Testing Confirms Superior Product
The medical center retained a third party environmental consultant who conducted monitoring and sampling for gaseous contaminants associated with helicopter exhaust. The contaminants include sulphur dioxide (S02), nitrogen dioxide (N02), and volatile organic compounds (total and speciated) during a helicopter landing event.
The medical center reviewed the results of the tests and concluded that our SAAF Cassettes with SAAFBlend GP media were superior. As a result, the medical center decided to use SAAF gas-phase filtration systems within all seventeen AHUs with outdoor air intakes in the vicinity of the helipad.