Hydrovac excavation

Hydrovac excavation is a means of soil extraction through vacuum when using pressurized water or air for breaking ground. This method of excavation is referred to as “soft excavation technology” and is commonly accepted as being equivalent or safer than hand digging around underground facilities.

Equipotential bondingElectrical bonding and grounding are crucial safety measure... More is the preferred method of protecting workers and members of the public from injuries due to electrical contact and step voltage potential when working on energised electrical apparatus. The aim is to keep all workers, equipment and plant at the same potential to mitigate the risk of current flow by establishing an equipotential zoneAn equipotential zone (EPZ) is an area where all metal work ... More.

Equipotential bondingElectrical bonding and grounding are crucial safety measure... More is required if electrical underground cables are shown:

• In the intended excavation area or within a perimeter zone of the intended excavation area if the underground cable/cables have been identified using plans only.
• In the intended excavation area or within a smaller perimeter zone of the intended excavation area if the underground electrical cable/cables have been identified using a mark out (using an appropriate location device).