Central Walk is a new 19m wide underground pedestrian concourse at Central Station that will connect passengers to trains, light rail, and new Sydney Metro underground platforms. Direct access to existing and new platforms will be through an extensive escalator system. The development of Central Station and the landmark Central Walk were awarded to international contractor Laing O’Rourke who proposed an innovative design with numerous benefits, including satisfying a key requirement that construction works needed to take place while keeping the existing station and train services operational.

At Breedon Quarry valuable aggregates need to be extracted close to the nearby community of Breedon on the Hill. After reaching the limits of drilling and blasting that could be done without creating excessive vibration and dust implications for the surrounding environment, Breedon needed to find another viable solution.

City Rail Link (CRL) is Auckland’s first underground rail line and the largest transport infrastructure project ever undertaken in New Zealand. Ventilation and dust control are needed to keep workers’ exposure to fumes and dust at safe, acceptable levels. Grydale provided ventilation design consulting to develop an extract ventilation system for the excavation of K-Road Station

Sandblasting generates large volumes of dust that can be toxic and small enough to be inhaled into lungs and thus can be hazardous to workers. Coastal Powdercoating decided to invest in a facilities upgrade programme to expand their operations. A core part of the programme was a larger blast room to enable larger powder coating projects to be undertaken more efficiently in-house, without affecting the quality of the end product.

A critical aspect of any tunnel construction is ventilation design and dust control, so that workers exposure to fumes and dust are reduced to safe, acceptable levels. New health and safety regulations specifically relating to the control of respirable crystalline silica (RCS), have been introduced to bring it into line with asbestos.

The Metro Tunnel provided some unique challenges for the ventilation design, including space and noise constraints plus the location on excavation works within the CBD. The design was created using Ventsim Design 5 to simulate ventilation, airflows, pressures, heat, gases, radon, fire and other key ventilation data to be considered, along with managing the financial constraints of the project.

Green Civil rented a JMS-20-MDT from Grydale Rental to work alongside a Vermeer Trencher to manage the dust creating from completing trenching work in Sydney.

The Greenbank Sewer Rising Main project was undertaken by Diona in November 2019, for the Logan Water Infrastructure Alliance and involved the installation of 5.6 kilometres of sewer rising main pipeline. They hired a JMS-20-MDT (Diesel, Track) dust collector from Grydale Rental to manage the silica dust created as a result of trenching through sandstone.