Collision Repair - Reducing Air Emissions 12-1 (a).ppt

Collision Repair - Reducing Air Emissions 12-2 (a) Air Emissions from Autobody Repair Activities Two basic kinds of air emmissions Volatile Organic Compounds (VOCs) Particulate (solids) Volatile Organic Compounds (VOCs) Volatile means the compounds “evaporate rapidly at a low air temperature”. VOCs are chemicals, such as paint thinner, that evaporate rapidly Air Emissions from Autobody Repair Activities VOCs contribute to the formation of smog in the lower atmosphere. Material Safety Data Sheet will indicate a product’s VOC content. Particulate Solid part of paint Contains the binder, pigments, and other additives. Air Emissions from Autobody Repair Activities Some paint particulates are easy to see in the air, while others are not. Nonetheless, all particulates decrease the air quality of our environment. Factors Affecting Air Emissions Paint Booths Paint booths control particulates If equipped with paint arrestors (exhaust filters) If used with a ventilation system Can filter incoming air and remove dust that can ruin a finish. Transfer Efficiency Improved transfer efficiency Less paint waste Factors Affecting Air Emissions Less overspray Lower air emissions. Improve spraying techniques Using equipment that is capable of a higher transfer efficiency. Closed Solvent Storage Containers Reduce evaporation Keep used solvent-soaked rags in closed fire-proof waste container. Factors Affecting Air Emissions Sanding/Blasting Dust is potentially hazardous because it is contaminated with paint. Use portable sandblasters with a vacuum attachment. Keeps the air in the shop cleaner. Worker exposure to dust reduced Less dust reaches the outdoor air where it can cause pollution problems. Factors Affecting Air Emissions Choice of Coating Materials Choose low VOC, high solids surface coating materials. VOC content is normally listed on Material Safety Data Sheets (MSDSs). Reducing Air Emissions From Autobody Repair Activities Prep Coats Use versatile products such a