Tank loses water or groundwater enters when empty.
Use the site evidence to agree a project-specific method with the responsible engineer, concrete producer, manufacturer or specialist applicator.
Tank loses water or groundwater enters when empty.
Separate plumbing loss from shell leakage; inspect joints, tie holes, cracks and penetrations.
Sustained pressure finds incomplete joints and poorly compacted concrete.
Repair defects and choose a system approved for the stored liquid and pressure direction.
Check surface condition and cure; detail penetrations and joints before field treatment.
Perform the specified water-retention test and document changes in water level.
For potable water, confirm material approval for contact with drinking water.
References inform the topic; they do not endorse a specific product for this project.