coatings.txt
coatings.txt — 2.0 KB
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General BACT guideline for coating processes General Painting Facilities Process Controls: Volatile Organic Compound (VOC): Water (H2O)-based coatings, high solids content coatings, low VOC coatings. (Ultraviolet (UV) or powder coatings can be used in very limited cases) Application: Airless, High Volume Low Pressure (HVLP), Electrostatic, dipping, rolling, brushing. Particulate Matter (PM): Filters: at least 95 percent efficiency; 99 percent efficiency if metals. Baghouse: 0.01 grain/standard cubic foot Add on control: Manned booths - may be required if 80 tons per year (TPY). Unmanned booths - may be required if > 40 TPY. Also need good ventilation system to minimize fugitive emissions. Expanded Polystyrene (EPS) Manufacturing General BACT: Low VOC bead content; minimize fugitive emissions with good ventilation design. Add on control required for emissions of pentane 20 TPY. Semiconductor Manufacturing General BACT: Separate emission exhaust streams for acids, caustics, VOCs, and reactive gasses. If cannot separate, use dual- stage scrubber. Acid and caustic gas streams should be routed to scrubbers with a minimum overall control efficiency of 85 percent. Reactive gasses such as silane or arsine shall be vented to a burn box. VOC emissions which will exceed 50 TPY (before controls) from any building (one or more FAB lines) will need add-on control. VOC emissions which will exceed 80 TPY (before controls) from the site (two or more buildings) will need add on control.