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Australian and New Zealand Environment and Conservation Council, 2000
Requirements under dangerous goods and occupational health and safety laws must continue to be met.
3.1 Techniques for Pollution Abatement
- Preparation areas should be bunded to ensure accidental spillage cannot escape to water.
- Spillage should be treated with a suitable absorbent and disposed of as a controlled waste.
- Facilities should be well designed and carefully managed. Alternatively, poorly designed existing facilities should be managed to optimise human and environmental protection;
- All plant and equipment from work areas should be subject to regular preventative maintenance programs to ensure optimum performance.
- Stocks of antifouling paint should be held in labelled containers.
- Antifoulants should be stored in secured and preferably bunded areas.
- Preparation of all antifoulants should take place in areas protected from traffic, with overhead cover.
- Site operators should assume any removed coating is contaminated with biocides and dispose of in accordance with requirements of local environmental and/or waste disposal authorities.
- Established written operational procedures should exist.
- Paint spraying should not be performed in high winds.
- Sheeting should be used to prevent spray drift.
3.2 Specific Requirements During Application - All Vessels
- Cleaning using water is preferred to chemicals.
- High pressure liquid cleaners that operate with detergents, solvents, caustic or acid should only be used if a system exists for collection of waste waters.
- Use of degreasers should be avoided.
- Discharge of coloured water to the waterway should be avoided.
- Low pressure, high volume spray guns are preferred over high pressure guns.
- Efficient use of all antifouling paints, during their application, should ensure that total losses due to all causes do not exceed 30% of the coating to be applied to the substrate. Consideration should be given to:
- maximising coating transfer efficiency during application;
- blowing back hose lines to the pump on completion of work;
- using returnable bulk containers;
- careful planning of coating operations to minimise coating residues and losses;
- application during optimal weather conditions, if possible.
3.3 Application Procedures for Small Vessels (<25m)
- All surfaces should be protected from over-spray through the use of tarpaulins and sheeting.
- All work should be carried out above the tidal zone.
- Brushes and rollers are preferred over spray equipment, where environmental conditions could result in spray drift off-site.
- Drop sheets should be placed under all surfaces to be painted.
3.4 Application Procedures for Large Vessels (>25m)
- All application of TBT requires the approval of the State agency and the facility must meet the specific requirements of that agency.