Methods to decrease lead (7439921) exposures in radiator repair shops were described. Ventilation principles involved in the design of effective ventilation systems and current OSHA lead standards were described. Three types of ventilation designs tested by NIOSH were examined, including ventilated enclosures, ventilated booths, and movable exhaust hoods. Lead exposures using ventilated enclosures decreased from 453 micrograms/cubic meter to 10 micrograms/cubic meter and no outside pollution resulting from the use of this system could be detected. Use of the ventilated booths reduced employee lead exposure by 91%, again with no resulting outdoor pollution. The last ventilation method described, the movable exhaust hood, decreased employee exposure levels from 193 micrograms/cubic meter to 13 micrograms/cubic meter. A checklist for use when planning a ventilation system was presented.