Page 92 - Best Practice for Construction Projects
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Identification of underground services
• Documentation required prior to starting any excavation:
Approved SSoW/SOP/risk assessment/underground
service drawings/excavation permit/SPA. To be kept at work
location.
11. Identification and Protection
• All known services to be identified prior to works
commencing.
• All known services to be marked on the ground prior to
excavation work commencing.
• CAT scanner to be used to determine the location of all
underground services.
• Services to be identified by marker posts to confirm the type
of service.
• Manholes and chambers in the vicinity of the work and in
adjacent buildings will be checked for any possible
anomalies before work on any excavation commences.
• Where non-metallic pipes are found a Sonde Transmitter
can be used in conjunction with the CAT scanner to
determine the location of non-metallic pipes.
• When working near exposed services, the services must to
be protected from impact.
• No machine excavation permitted within:
o 1m of HT cables
o 1.5m from natural gas line
o 1m from previously excavated natural gas line
o 600mm from other services
1 Visual Standards | Feb. 2019
