Abstract |
On August 4, 1999, the National Institute for Occupational Safety and Health (NIOSH) received a request from the Costa Mesa Fire Department (CMFD), located in Costa Mesa, California, to conduct a health hazard evaluation (HHE). The CMFD was planning to install diesel exhaust filtration systems on some of their apparatus and wanted NIOSH to evaluate the effectiveness of the controls. In response to the request, NIOSH conducted pre- and post-control evaluations of diesel exhaust in two fire stations. The pre-control evaluations were conducted on November 8-11, 1999. Samples were collected to characterize contaminant concentrations at the fire stations, and to provide base line data for determining the effectiveness of the ceramic exhaust filters at controlling these contaminants. Airborne concentrations of elemental carbon, sulfur dioxide, nitric oxide, nitrogen dioxide, and volatile organic compounds were measured. After the ceramic filters were installed on the engines, a follow-up evaluation was conducted on March 14-17, 2000, to determine the controls effectiveness in reducing diesel soot in the fire stations. |