This report describes the development of a prototype system for use by firefighters at a fire scene, the rapid dry firefighter field decontamination system (RDFFDS). Some diseases occurring at higher rates in firefighters than in the general population, including cardiovascular disease and certain cancers, may result from firefighters' exposure to hazardous substances in the workplace. The new RDFFDS utilizes air jets to remove particulate contamination from firefighter turnout gear and equipment. Multiple studies have shown that, during fire response, firefighter gear becomes contaminated with hazardous substances including heavy metals, polycyclic aromatic hydrocarbons (PAHs), and volatile organic compounds (VOCs). Many of these substances may be adsorbed onto particulate matter and carried back to firehouses, as shown by analysis of vacuum cleaner dust collected in California fire stations. Field decontamination before entering vehicles may reduce the amount of contamination brought back to the fire station and reduce continuing personnel exposures when the gear is re-worn. Results of laboratory testing of prototype decontamination methods identified several methods capable of removing 70-80% or more of a test soil from cloth swatches. One prototype method field tested during firefighter training activities required only about 1 minute for decontamination of firefighter turnout coat and pants. Further field testing is necessary to confirm the acceptance and effectiveness of this technology.