© South Coast Air Quality Management District, Form 500-B (2014.07) Page 2 of 2
Trivial Activities
Combustion emissions from propulsion of mobile sources, except for vessel emissions from Outer
Continental Shelf sources
Air-conditioning units used for human comfort that do not have applicable requirements under Title VI of the
Act
Ventilating units used for human comfort that do not exhaust air pollutants into the ambient air from any
manufacturing/industrial or commercial process
Non-commercial food preparation
Consumer use of office equipment and products, not including printers or businesses primarily involved in
photographic reproduction
Janitorial services and consumer use of janitorial products
Internal combustion engines used for landscaping purposes
Laundry activities, except for dry-cleaning and steam boilers
Bathroom/toilet vent emissions
Emergency (backup) electrical generators at residential locations
Tobacco smoking rooms and areas
Blacksmith forges
Plant maintenance and upkeep activities (e.g., grounds-keeping, general repairs, cleaning, painting, welding,
plumbing, re-tarring roofs, installing insulation, and paving parking lots) provided these activities are not
conducted as part of a manufacturing process, are not related to the source’s primary business activity, and
not otherwise triggering a permit modification
1
Repair or maintenance shop activities not related to the source’s primary business activity, not including
emissions from surface coating or de-greasing (solvent metal cleaning) activities, and not otherwise
triggering a permit modification
Portable electrical generators that can be moved by hand from one location to another
2
Hand-held equipment for buffing, polishing, cutting, drilling, sawing, grinding, turning or machining wood,
metal or plastic
Brazing, soldering and welding equipment, and cutting torches related to manufacturing and construction
activities that do not result in emission of HAP metals
3
Bench-scale laboratory equipment used for physical or chemical analysis, but not lab fume hoods or vents
4
Routine calibration and maintenance of laboratory equipment or other analytical instruments
Equipment used for quality control/assurance or inspection purposes, including sampling equipment used to
withdraw materials for analysis
Hydraulic and hydrostatic testing equipment
Environmental chambers not using hazardous air pollutant (HAP) gasses
Shock chambers
Humidity chambers
Solar simulators
Fugitive emission related to movement of passenger vehicles, provided any required fugitive
dust control plan or its equivalent is submitted
Process water filtration systems and demineralizers
Demineralized water tanks and demineralizer vents Air compressors and pneumatically
operated equipment, including hand tools
Batteries and battery charging stations, except at battery manufacturing plants
Storage tanks, vessels and containers holding or storing liquid substances that will not emit any
VOC or HAP
5
Storage tanks, reservoirs, and pumping and handling equipment of any size containing soaps,
vegetable oil, grease, animal fat and nonvolatile aqueous salt solutions, provided appropriate
lids and covers are utilized
Equipment used to mix and package soaps, vegetable oil, grease, animal fat, and nonvolatile
aqueous salt solutions, provided appropriate lids and covers are utilized
Drop hammers or hydraulic presses for forging or metalworking
Equipment used exclusively to slaughter animals, but not including other equipment at
slaughterhouses, such as rendering cookers, boilers, heating plants, incinerators, and electrical
power generating equipment
Vents from continuous emissions monitors and other analyzers
Natural gas pressure regulator vents, excluding venting at oil and gas production facilities
Hand-held applicator equipment for hot melt adhesives with no VOC in the adhesive
formulation
Equipment used for surface coating, painting, dipping or spraying operations, except those that
will emit VOC or HAP
CO
2
lasers, used only on metals and other materials which do not emit HAP in the process
Consumer use of paper trimmers/binders
Electric or steam-heated drying ovens and autoclaves, but not the emissions from the articles
or substance being processed in the ovens or autoclaves or the boilers delivering the steam
Salt baths using nonvolatile salts that do not result in emissions of any regulated air pollutants
Laser trimmers using dust collection to prevent fugitive emissions
Boiler water treatment operations, not including cooling towers
Oxygen scavenging (de-aeration) of water
Ozone generators
Fire suppression systems
Emergency road flares
Steam vents and safety relief valves
Steam leaks
Steam cleaning operations
Steam sterilizers
1
Cleaning and painting activities qualify as trivial if they are not subject to VOC or HAP control requirements. Asphalt batch plant owners/operators must still get a permit if otherwise required.
2
“Moved by hand” means it can be moved without the assistance of any motorized or non-motorized vehicle, conveyance or device.
3
Brazing, soldering and welding equipment, and cutting torches related to manufacturing and construction activities that emit HAP metals are more appropriate for treatment as unpermitted equipment. Brazing, soldering,
welding and cutting torches directly related to plant maintenance and upkeep and repair or maintenance shop activities that emit HAP metals are treated as trivial and listed separately in this appendix.
4
Many lab fume hoods or vents might qualify for treatment as unpermitted equipment.
5
Exemptions for storage tanks containing petroleum liquids or other volatile organic liquids should be based on size limits such as storage tank capacity and vapor pressure of liquids stored and are not appropriate for this list.