As a response to numerous failures and poor performance of environmental closures at landfills, engineers have studied new approaches to establish a more physically stable and environmentally sound solution. Traditional landfills require large amounts of soil throughout their lifespan and are often lacking adequate soil to complete closure construction. Many of these landfills experience on-going erosion and sedimentation issues. Traditional covers are highly reliant on trucking soils, heavy civil construction, on-going maintenance and repairs in order to maintain their integrity. Introducing ClosureTurf®, an EPA, Subtitle D Compliant landfill closure solution that is specifically designed to address and solve soil erosion, slope integrity, gas emission, installation and maintenance cost control, EPA regulation compliance, and longevity of structure and appearance.
ClosureTurf is a patented, three component system comprised of a structured geomembrane, an engineered turf, and a specialized sand infill. The foundation of the system is an impermeable, highly transmissive structured geomembrane. It provides for the highest interface friction values available in the market. The engineered turf component gives the system its natural look and feel of grass while protecting the geomembrane from extreme weather conditions for the long term. The specialized sand infill component is placed between the blades of the engineered turf and allows the system to be trafficked while also providing additional protection from weathering. When required, ClosureTurf’s patented surficial gas system is included with the system to vent landfill gas emissions. ClosureTurf is fast and easy to install for an aesthetically pleasing, cost-effective landfill closure solution.
System Configuration Options
AGRU Super Gripnet® (top)
AGRU Super Gripnet® (bottom)
ASTM C-33 Sand
The three durable, high-strength system components ensure a long-life of protection against operational and natural forces while maintaining an excellent appearance with greatly reduced maintenance.
ClosureTurf allows for faster capping during the operational life of the landfill. Faster capping reduces odors, improves gas collection efficiency and enhances compliance with Title V air quality rules.
Soil Cover Savings
ClosureTurf eliminates the need for high maintenance vegetative soil covers and increases weather resistance. Since final cover soils are challenging to locate and expensive to place in the final stages of the landfill’s lifespan, the resulting savings can be significant.
The ClosureTurf system is better for landfills in sensitive areas where soil erosion and sedimentation are a major concern. Soil loss is non-existent during operations and post-closure. Eliminates the need for borrow sources, and siltation ponds can be converted to simple stormwater retention ponds. As a direct result, associated environmental construction impacts are much easier to manage.
Steeper Waste Slopes
Since soil stability problems either through earthquake or gas pressure buildup is reduced, steeper waste slopes can be used.
The components of the ClosureTurf system work in conjunction to seal the waste mass from the destructive forces of high rainfall intensities and hurricane force winds.
Reduced Wildlife Impacts
By reducing organic matter and food sources, fewer animals, including birds, are attracted to the site. This is important at landfills located in coastal areas or near airports. Because the components of the ClosureTurf system do not pass the animals’ smell/taste test, they do not usually bother with it.
Eliminates Cap Infiltration
Since surface water is not restricted by the hydraulic conductivity of a vegetative cover drainage system, and can no longer infiltrate into the waste, leachate production is cut off at the source.
Enhanced Visual Inspection
Because the synthetic materials are not covered with thick soil profiles, they are easily inspected for damage; which, if identified, may be easily and inexpensively repaired. Also, most damage to synthetic caps is done by earthwork equipment during soil placement. By replacing the soil layer with ClosureTurf, this is no longer an issue.
Easier Reclamation Access
Landfill materials are readily accessible in the event of landfill reclamation for future piggyback areas or future waste lifts due to waste settlement or vertical expansion. The composite nature of the ClosureTurf system allows owners access to the waste without having to remove the existing cover soils of a typical and traditional final cover system.
Reduces and sometimes eliminates the need for traditional gas wells or piping.
Eliminates 99.9% of sediment runoff versus traditional practices.
Eliminating thick soil profiles over the geosynthetics provides greater stability on steeper grades and reduces slope rebuilding.