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Types of Waste

• Paint

• Paint filters

• Paint solvents

• Masking

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Types of Waste

• Used coolant• Used oil• Oil filters• Spill dry• Shop rags• Cleaning solvents• Spray solvent

• Washwater• Refrigerants• Scrap parts• Batteries• Tires

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Transfer Efficiency

• How much paint actually coats surface vs. paint sprayed

• Benefits– Buy less paint– Replace filter less frequently– Easier and less booth clean-up

• Factors: training, equipment, maintenance, geometry

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Paint Formulation & Mixing

• Solids content

• Water-based primers (& topcoats?)

• Don’t add excess thinner

• Better estimate amount needed

• Provide excess as touch-up paint

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Paint Equipment

• Spray guns– conventional– High-Volume Low-Pressure– air-assisted airless

• Electrostatics

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Painter Training

• Clean and maintain equipment

• Minimum air pressure for correct atomization

• Perpendicular to surface (no arcs)

• Uniform distance,speed, and overlap

• Personal Protective Equipment

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Paint Booths

• Painting and priming in booth

• Filter intake air and exhaust air

• Keep booth clean– no other work (e.g. sanding)– damp clean– no drain holes to ground– dust off workers entering

• Design criteria

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Paint &Paint &

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There is always a better way!There is always a better way!

Paint Booth Filters

• Increase transfer efficiency

• Use non-hazardous paint

• Use graduated density filters

• Use baffles in front of filters

• Use Styrofoam filters

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Paint &Paint &

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Line Cleaning

• Schedule painting from light to dark

• Use paint cups or shorter lines

• Blow paint out of lines and reuse

• Use “dirty” solvent for first cleaning

• Use recirculating gun washer

• Evaluate distillation unit

• Water-based formulations

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Paint &Paint &

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Washwater (from floor cleaning)

• Use better housekeeping and spill prevention

• Use less water– dry cleanup when possible– mop and bucket– high-pressure low-flow nozzle

• Use vacuum floor cleaner

• Watch out: emulsifying cleaner

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Paint &Paint &

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Washwater (from vehicle cleaning)

• Wash only when needed

• Reuse– recirculating wash system– fresh water rinse as makeup water– old wash water for engine cleaning

• Watch out: emulsifying cleaners

• Covered collection pad

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Hand Washing

• Wipe in rags first

• Solvents strip natural oils

• Are you on septic tank?

• Use gloves

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Fluid Spills (“spill dry”)

• Prevent spills

• Practice better housekeeping

• Use drip pans

• Use absorbent booms ("pigs")

• Use reusable absorbents

• Investigate peat absorbent

• Wipe up as much as possible

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Shop rags/towels

• Use inventory control

• Segregate from liquid wastes

• Use industrial laundry

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Spray Cleaners (brake, carb...)

• Use only when needed

• Use inventory control

• Try pump sprays

• Use alternative cleaners

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There is always a better way!There is always a better way!

R12CFC

Refrigerants

• Repair A/C leaks

• Use recovery / recycle equipment

• Technician certification

• Use alternative refrigerant

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There is always a better way!There is always a better way!

Used and Scrap Parts

• Store properly– remove and collect fluids– keep out of the weather

• Recycle old parts as scrap metal– brake drums– tire weights– etc.

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Paint &Paint &

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There is always a better way!There is always a better way!