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A Landfill Construction Quality Assurance Primer

The purpose of Landfill Construction Quality Assurance is to ensure that the landfill is constructed in full compliance with the specification. The primary responsibility for ensuring this, rests with the landfill construction (civil engineering) contractor. The CQA Engineer (provided by Rowe Environmental), on site, provides independent inspection and verification of the work, and receives all the contractor’s site construction quality assurance records.

We’ve been asked just where Landfill Construction Quality Assurance fits into the various components and stages of landfill development.

A typical landfill consists of the following subsystems such:

  • Landfill liner
  • Leachate collection and management system
  • Landfill gas management system
  • Landfill gas monitoring & leachate monitoring systems
  • Final landfill cap
  • Drainage system
  • Road network

Their function is to secure the normal landfill operations and to control the anticipated emissions generated mainly by the decomposition of organic matter, such as leachate and landfill gas.

The appointed Landfill CQA Engineer is normally required to inspect all parts of the works constructed during the landfill development contract works which will control the potential emissions from the site. So, from the list above, the CQA Engineer is normally required to inspect, witness test, and verify the recording of all the above listed subsystems except for the road network. Even within the road network he/she would also inspect the work such that the road networks installed for access close to the development works will not be such as to risk damage the integrity of the liner, walls, or capping.

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