SUMMARY
The right interval depends on diameter, load, sediment rate and incident history.
01Assess the actual operating conditions
Frequency and method should be based on load, sediment characteristics, access and historical incidents—not a fixed calendar alone.
02Prepare the site and records
Confirm the work boundary, access route, isolation conditions, contacts and evidence needed for acceptance.
03Verify completion
Review the agreed scope, site condition, process records and the handling route for removed material.