ABSTRACT

Little thought has been given to those features of the liner that, although not a problem at the time of installation, could be used to help assure the durability of the geomembrane. The tests that should be included in conformance testing programs are as follows: During the installation of the geomembrane there are a number of items that should be added to the typical CQA plan, most of which are related to minimizing the potential for stress cracking in HDPE. The method was developed to locate leaks in the geomembranes of uncovered liquid impoundments but has recently been extended to the detection of leaks underneath the soil covers on landfill liners. Prior to constructing a landfill it is, necessary to show that the proposed geomembrane is capable of performing as intended and is capable of containing the specific landfill leachate over the required operating and post-closure periods. The geomembrane requires chemical compatibility with the leachate and mechanical durability.