Health hazard evaluation report: HETA 97-0045-2676, Cle Elum-Roslyn High School, Cle Elum, Washington.
On May 8, 1997, the National Institute for Occupational Safety and Health (NIOSH) received a request from the Kittitas County Health Department for technical assistance in the evaluation of potential microbial contamination in the Cle Elum-Rosyln High School, Cle Elum, Washington. A similar request had been previously received by NIOSH from employees of the school. On May 28-29, 1997, NIOSH investigators conducted an initial visit to the school. Bulk samples of building materials were collected to assess potential areas of microbial contamination and measurements were made of general indoor air quality comfort parameters. On September 15-16, 1997, NIOSH investigators conducted a follow-up evaluation during which air samples were collected for culturable fungi and spores, and measurements were repeated for general indoor air quality parameters. Fungal concentrations from the bulk material samples ranged from none detected (ND) to 6.4xten to the sixth power colony forming units per gram of material (CFU/gm). The predominant fungi identified included Aspergillus versicolor, Chaetomium, Penicillium, Paecilomyces, Stachybotrys chartarum (a.k.a., S. atra), Rhodotorula, Sporobolomyces, and unidentified yeasts.