Spray painting
Spray painting includes the spray application of paint, paint solvents, varnish, lacquer, dyes, metal oxides, adhesive coatings, elastomer coatings, stains and polishes. Spray painting can result in problems of over-spray, dust, and solvent fumes having adverse effects on the environment. Spray painting is controlled by regional rules in the Regional Air Quality Management Plan.
Discharges to air
Rule 15 of the Regional Air Quality Management Plan permits spray painting from a stationary source at a rate of less than 30 litres (or 30 kg) and not exceeding 3 litres (or 3 kg) per hour, spray painting at any rate from a mobile source, and discharges from the stoving of enamel or baking and drying of other coating materials, subject to compliance with conditions stated in the rule. Rule 15 does not apply to the spray application of materials that contain di-isocyanate-based paints.
Rule 14 of the Regional Air Quality Management Plan permits spray painting with materials containing di-isocyanates or organic plastiscisers, subject to compliance with conditions stated in the rule and provided the di-isocyanate is used at a rate of less than 10 litres (or 10 kg) per day and less than 3 litres (or 3 kg) per hour.
Rule 23 of the Regional Air Quality Management Plan requires a discharge permit for any spray painting unless the discharge is allowed by Rule 14 or Rule 15. This is a discretionary activity.