The Thermoplastic Liners for Detention System technical note is general information with materials, design, installation and estimating liner material.

General information about applications, infiltration of stormwater, cost effective stormwater containment and puncture resistance discussed.

Membrane materials, PVC are an effective liner material, resistant to chemical resistance and includes fillers and plasticizers to reduce cost and UV inhibitors to extend life.

Geotextile material are listed as type, seaming options, with design of general & high flow bypass and buoyancy.

Liner cross sections are shown with notes about calculating bedding thickness, the relationship between bedding thickness and maximum allowable groundwater elevation with bulk density details.

Installation covers tips on installing liners, removing sticks/stones from excavation site and how to place the liners.

Estimating liner material require dimensional details to design panels and provide firm material quotations. The liner and reinforcing fabric quantities should include sidewalls and extra material for anchoring during installation. Diagrams for pipe penetrations and estimating worksheet are included.