Where we line
- Wastewater ponds and lagoons
- Balancing basins
- Sludge drying beds
Specification points
- Liner thickness to the approved design and the effluent being held
- Gas venting under the liner where organic matter in the subgrade can generate gas
- Protection where desludging equipment works on the liner
- Inlet, outlet and overflow structures detailed and sealed with extrusion-welded boots
Testing and records
Seams are tested by vacuum box and spark testing, with peel and shear tests on trial welds and seam samples. Test and repair records are handed over with the as-built data.