Ground Disturbance Level II case studies
Ground Disturbance Level II · Put your knowledge to work in context.
Ground Disturbance Level II is a Canadian industry safety credential for workers who plan, supervise, or carry out activities that disturb the ground - excavating, trenching, augering, and similar work - where buried pipelines, cables, and other underground facilities may be present. It is typically sought by equipment operators, locators, utility and pipeline personnel, construction supervisors, and health and safety coordinators who need a deeper working knowledge than an entry-level awareness course provides. The Ground Disturbance Level II case studies are 5 cases and about 2,760 words.
1Pipeline Crossing on a Tight Municipal Right-of-Way
A utility crew is scheduled to install a 200 mm water service line across a 25 m municipal road allowance. Records show a 323 mm high-pressure gas transmission pipeline running parallel to the road at an offset of 3.0 m from the proposed trench centreline, with a recorded depth of cover of 1.2 m.
616 words, about 3 min2Locate Ticket Discrepancy at a Brownfield Site
A contractor is preparing to excavate a 3 m deep foundation for a small addition on a former industrial site. The one-call locate request was submitted 4 business days ago.
531 words, about 3 min3Sloughing Trench in Thawing Ground
A crew is installing a 2.4 m deep sanitary sewer in a residential back lane in early spring. The soil is a silty clay that was frozen at the start of the job but is now thawing at the surface.
560 words, about 3 min4Supervisor's Duty When a Subcontractor Skips the Locate
A general contractor's superintendent oversees a site where an electrical subcontractor is trenching for conduit. The subcontractor's crew has started digging without a locate ticket, claiming the area was located two weeks ago for a different scope and the paint is still visible.
533 words, about 3 min5Emergency Repair at Night With Incomplete Records
A water main breaks at 23:00 on a commercial street, flooding a basement. The utility's emergency crew arrives with a backhoe.
520 words, about 3 min