Drilling into non-friable ACM using an H rated industrial HEPA filter vacuum to control airborne fibres and dust
This safe work procedure describes the preparation, process and work method for drilling holes into non-friable (bonded) asbestos-containing material (ACM) such as fibro, hardiplank, compressed sheeting, tilux, using an H rated industrial HEPA filter vacuum to control airborne fibres and dust.
A range of equipment should be used to control the risk of exposure to airborne asbestos fibres, including:
200 μm plastic drop sheets
rolls of duct or gaffer tape
plastic bags 1200 x 900 mm (200 μm) labelled with a warning (e.g. CAUTION: Asbestos, Do not damage or open bag. Do not inhale dust.)
barricading or hazard tape
bucket three-quarters full of water
atomiser bottle with water
access to a continuous supply of water
cordless drill or hand drill
drill bits suitable for the task
rags or disposable wipes
H rated industrial HEPA filter vacuum that meets AS4260 and AS/NZS 60335.2.69:2003
shadow vacuuming attachments
PVA glue (sealant) and a small paint brush
access to the first aid kit
safety lace less work boots.
Some of the required equipment.
Safe work procedures
Follow the steps depicted below and view the example videos.
1. Place duct tape over intended drilling point. Mark the proposed hole for drilling on the duct tape.
2. Fit a drilling nozzle attachment to the H rated industrial HEPA filter vacuum hose, position the drill bit on the point to be drilled.
3. Turn on the vacuum cleaner and commence drilling the holes, ensure that the drilling nozzle attachment is firmly positioned flat against the sheeting.
4. Do not remove until the drilling is complete. This procedure is called shadow vacuuming.
6. Decontaminate the vacuum and tools by detaching the dust brush from the vacuum hose and vacuum the brush bristles. Seal the vacuum cleaner hose entry point with duct tape.
7. Wet wipe all external surfaces of the vacuum cleaner and hose. All wet wipes and rags are to be disposed of into an approved asbestos waste bag which is correctly labelled and is 200 µm thick.