The results of a health hazard evaluation, requested by employees, of an automobile dealership were reported. Three concerns involved health hazards associated with undercoating, fumes from a kerosene steam cleaner, and car exhaust. Workers reported symptoms of headache, nausea, vomiting, and dizziness. Air samples of volatile organic compounds (VOC) were collected to evaluate exposures during undercoating. The tail pipe exhaust ventilation system and exhaust port flow rates were evaluated. The components detected in the samples of undercoating compounds were C9 to C12 aliphatic hydrocarbons, present in less than relevant occupational concentrations. Carbon-monoxide (630080) was measured at 300 parts per million (ppm) in air samples take directly above the exhaust while the steam cleaner operated. Nitrogen-dioxide (10102440) was present at 1ppm and sulfur-dioxide (7446095) at 3ppm. The tail pipe exhaust ventilation system did not effectively remove gases from the service area until temporary modifications were made. There was air leakage into the tail pipe exhaust ventilation system that could not be identified. The authors conclude that the exhaust port covers should be replaced with covers using self closing caps, the exhaust fan should be replaced, exhaust fan discharge should be relocated to the roof, and dilution ventilation should be supplied. The steamer should be used with building doors open or should be vented to the outside.