MAP20071018124 Hazard, William G. Exhaust and ventilation. Part II : specific applications / by William G. Hazard Sumario: Open surface tanks, spray booths, welding, grinding operations, and various exhaust procedures are typical problems requiring special attention for a healthy work environment En: National safety news. - Chicago. - Vol, 118, nº 6, December 1978 ; p. 81-85 1. Higiene industrial . 2. Contaminación atmosférica . 3. Contaminantes químicos . 4. Sprays . 5. Soldadura . 6. Tanques de almacenamiento . 7. Control de la contaminación . 8. Ventilación . 9. Sistemas de ventilación . I. Título. II. Título: National safety news.