scope:

NOTE:

This guide specification covers the requirements for a fuel impermeable liner system intended to serve a diked tank enclosure (petroleum applications only). The liner system typically consists of a combination of a geomembrane (to provide liquid tight containment) and geotextile (to protect the geomembrane). This specification includes requirements for two types of geomembrane: Non-reinforced (HDPE - high-density polyethylene) and fabric reinforced (FML - flexible membrane liner). Non-reinforced (HDPE) is only acceptable for use where completely covered with a material (concrete, aggregate, etc) to avoid the effects of thermal expansion from temperature change, degradation from UV light and environmental stress cracking.