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Usually not. Most of our work is carried out by divers with the reservoir full and in service, including sediment removal, inspections, leak investigation and fire tank servicing. Ladder, post and pipework replacement can also be completed online in many cases.

Keeping the asset in service avoids draining, refilling and the water loss and supply disruption that come with them. Where a shutdown genuinely is required, we will tell you at the planning stage rather than on the day.

Every item that enters a potable water asset is dedicated to potable water service, cleaned and disinfected before mobilisation, and transported enclosed in a purpose-built truck. On site, equipment is laid out on clean surfaces and never contacts the ground.

Divers work in hygienic dry suits and full face masks on filtered surface supplied air, and all equipment is accounted for before the asset is closed. There is no room for error when working with potable water, so these controls apply on every job regardless of its size.

It depends on the asset. Sediment accumulation varies with catchment, source water, turnover and the age and condition of the structure, and requirements differ between states and territories. Two tanks in the same network can need very different intervals.

The practical answer is to inspect, then set the interval from what is found. We use previous inspection results and asset condition to build maintenance programmes with water managers rather than applying a fixed cycle to everything. Our Knowledge Hub covers cleaning intervals and condition assessment in more detail.

A Cleaning Report and an Asset Condition Report, delivered electronically. These include an executive summary, defect descriptions, condition ratings, prioritised maintenance recommendations and date-stamped photography.

The reporting is written to be used, both by operations staff dealing with an immediate defect and by asset managers planning capital works. If the inspection identifies rectification work, we can quote and carry it out ourselves rather than handing you a report and leaving.

Yes. All diving is planned and conducted in accordance with AS/NZS 2299 using surface supplied breathing apparatus. Divers are ADAS certified to Commercial Diving Level 2 as a minimum, and every dive team includes a qualified dive supervisor and a standby diver.

Personnel also hold confined space, working at heights, rigging and IRATA industrial rope access qualifications for emergency retrieval, along with advanced first aid and oxygen resuscitation training. Competency records, safe work method statements and dive documentation are available for your procurement process.