Two Chimney Stacks Removal of 20 bonded ACM vent pipes from a height of 154m. DBC provided the access consultancy and engineered Husik mobile circumferential temporary platform access system. Climb ascent to establish anchors using IRATA rope access alpine techniques and to enable powered access to the top of both chimneys in order to lift technicians and equipment. Installed rigging and circumferential platforms, then established water and air services to the top and completed the core-drilling through 230mm thick shell to remove ACM vents, lower to ground and sampled surrounds for ACM clearance certificate.