PROTECTING OUR AIR AND WATER WITH FLEXIBLE MEMBRANE
LINERS, COVERS, AND FABRICATIONS

Dike Liners

Dike liners—impermeable flexible membranes that cover the area around an aboveground tank or group of tanks—are secondary petroleum / fuel containment systems that prevent leaks from the tanks or their connecting pipes and valves from escaping into the soil. The geomembrane used here must be chosen based on its ability to withstand long term contact with whatever the tanks hold, from unrefined oil to jet fuel. It must have excellent puncture resistance, resistance to UV degradation, and must hold up to thermal expansion and contraction. When it’s necessary to rely on secondary containment, it becomes primary containment. It’s worth repeating that when it’s necessary to rely on secondary containment, it becomes primary containment.

This jobsite is at the Naval Air Station, Cherry Point, North Carolina. MPC crews installed a 12 ounce nonwoven geotextile over the prepared stone surface around the newly built tanks. A PetroGard VI liner was installed over the geotextile and around any fittings that could potentially develop leaks. Containment berms around the area were also protected. Like the diked area liners, the containment berm liners were made from fuel resistant PetroGard Vl, insuring SPCC compliance. PetroGard X was used as a part of the leak detection system under the steel API 650 tank floors.