The geomembrane industry has been buzzing lately with a new interest in geomembrane covers which are left uncovered. It’s advantageous in some situations to leave a rain-shedding cover, over a closed waste or another site, uncovered, at least for some extended period of time. This allows the owner/engineers to perform various in-situ treatment of the underlying material, make modifications to the geomembrane cover, and/or leave the site available for new or anticipated technological advances for long-term site management.
This past June, Seaman Corporation’s Geomembrane group participated in PennTec, the 90th Annual Pennsylvania Water Environment Conference and Tradeshow in Hershey. This group is affiliated with the Water Environment Federation (WEF) and includes many members who are also members of the Pennsylvania Section of the American Water Works Association (PA-AWWA). On display were XR-5® Geomembranes used for wastewater and potable water applications.
Some of the harshest environs in the world are in extreme cold applications. Wastewater operations must be designed with materials and features which ensure those successes. Let’s take a look at one such installation, the 6-acre geomembrane lined wastewater impoundment at the Lowell Point wastewater treatment plant in Seward, Alaska. The reinforced ethylene copolymer has been in service at the facility for over a quarter of a century. Here are five features of the original site design, product selection, and installation, which were essential to its success and longevity.
XR® Geomembranes, a product of Seaman Corporation, will be exhibiting at North America’s leading energy event. Global Petroleum Show (GPS) is set for June 12-14 at Stampede Park in Calgary, Canada.
Spill berms are utilized as barriers that prohibit the spread of contamination into the ground, surface water, and waterways. Unlike a permanent containment liner, spill berms are typically temporary or semi-permanent. In some cases, permanent spill berms are utilized, which require long-term high-performance geomembranes to adequately protect the environment. Temporary spill berms are portable, short-term containment. These types of berms are used for day-to-day activities such as the offloading of trucks, short-term storage, and site preparations to name a few. They resist contaminates, can undergo abrasion and potential punctures during operation, are easily cleanable following a spill, and easy to use.
Like politics, religion, or how to build a fire, everyone has an opinion. There are actually pros and cons to either leaving the geomembrane exposed (no cover) or burying it (complete cover). Let’s look at the issues.
It is vital to consider the effects of a geomembrane’s exposure to weathering to ensure optimal long-term performance. The most important factor in determining performance in any given environment is the type of polymer used in the geomembrane.
When Fairway Energy Partners needed to expand its underground crude oil storage capacity at a facility in Houston, it turned to XR-5 geomembranes. The membrane liners were an ideal solution for containing brine and crude oil on the massive project.
When choosing the correct geomembrane for geofoam coverage in road and bridge construction applications, there are six properties you always need to take into consideration:
1. Puncture Strength/Abrasion Resistance
2. Tensile Strength
4. Vapor Transmission
6. Chemical Resistance