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Liners

The landfill liner system and its components, including the HDPE (high density polyethylene) liner are designed to provide maximum protection to the environment. Installation of the liner system is supervised and inspected to ensure that it meets or exceeds environmental standards.

Preparation of the existing ground surface is performed prior to construction of the liner system to achieve the design subgrade configuration and remove rocks that could penetrate the liner. Two feet of compacted clay or a geosyntheic clay liner (GCL) is then placed over the prepared subgrade surface and the 60 mil HDPE liner is installed over the clay or GCl material. Finally, a drainage geocomposite is placed above the HDPE liner. The HDPE liner is fabricated, installed, tested and repaired in accordance with approved guidelines. All manufacturer's recommendations and installation procedures are overseen by independent Quality Assurance personnel. Prior to implementation, Quality Assurance/Quality Control (QA/QC) consultants certified that the geosynthetic materials have been properly installed.