The most critical components of a landfill closure cap are the barrier layer and the drainage layer. The barrier (sealing) layer can be low-permeability soil (clay) and/or made from geosynthetic clay liners (GCLs).

We explain why the landfill CQA engineers involved in CQC and CQA hold a such a vital role as the final link in ensuring that the landfill design is constructed to the specified requirements. CQ Engineers never forget! Future generations depend on you!

Use of HDPE Telescopic Leachate Shafts for leachate collection and extraction are described and explained.

The choice of Geosynthetic Clay Liner (GCL) may be a great option when the more normal Compacted Clay Liner (CCL) option is expensive or is not readily available in a region. Read about GCLs here!

The US Fabricated Geomembrane Institute (FGI) offers its popular short course, "Constructing with Fabricated Geomembranes", on 23 October 2009 in Lakewood, Colorado. Those involved with the design, construction, operation and closure of potable water and irrigation ponds, floating covers, canals, landfills, waste water lagoons, secondary containment, golf course ponds, decorative applications, corrective action activities at closed sites, etc. are encouraged to attend.

Inferior geo-composite membranes which should both provide a low permeability membrane to cap a landfill and replace drainage stone otherwise needed above the low permeability layer are being offered which don't do the job. It is essential to drain the interface and prevent development of a slip plane at the membrane on even quite gentle landfill slopes, but slip failures are inevitable if inadequate geo-composites are used. Find out how to avoid this pitfall.

Landfill engineers are increasingly preoccupied with building landfills which will capture as much landfill gas as possible and use that gas optimally to generate renewable energy. However, this very engineering holds dangers for the environment around a landfill, with raised leachate levels, and extra stress on landfill lining membranes.

Landfill Capping is the most widespread type of remediation since it is in general less pricey than other technologies and actually manages the human being and environmental risks allied with a remediation place. In this article we provide the basics of capping according to the US EPA.

Landfill reclamation is a technique which can be very beneficial and profitable to developers in certain cases. To reclaim the land of an old tip returns it to normal use and the land can then be used for housing and factories etc. Read more about Landfill Reclamation in this article now!

Landfill CQA Actions up to the Start of Construction Once the landfill design engineer has completed the landfill design and the specification has been substantially completed, it is possible to write the landfill Construction Quality Assurance (CQA) Plan, which the construction contractor will then be required to follow, and which will once completed be reported upon [...]