A passive sub-slab gas venting and vapor barrier system was installed for a Groundwater Extraction and Treatment System facility constructed at a Superfund site in Northern New Jersey. The project required a below-slab system designed to support vapor intrusion mitigation while coordinating with broader construction and treatment system requirements.

The project included installation of Drago Wrap Soil Gas Barrier across the 5,850 sq ft building slab. The passive sub-slab ventilation system included 380 linear feet of 6-inch PVC Schedule 80 sub-slab piping, 60 linear feet of 6-inch PVC riser piping, and associated fittings.

Drago Wrap Soil Gas Barrier was selected to support the project’s vapor intrusion protection strategy. Drago Wrap is designed as a high-performance barrier for contaminated sites where vapor intrusion concerns may include volatile organic compounds such as perchloroethylene/tetrachloroethene (PCE), trichloroethylene (TCE), benzene, toluene, ethylbenzene, and xylenes (BTEX), and other contaminants.

For this project, system continuity and installation quality were key considerations. Installation and testing operations were coordinated with the construction manager and other contractors working on-site to support the overall construction schedule while completing barrier placement, venting components, and required detailing.

After installation, smoke testing was performed to visually identify potential leaks and help confirm barrier integrity in accordance with industry standards and best practices. This added quality control step helped provide confidence that the installed system was properly sealed before construction advanced.

With Drago Wrap Soil Gas Barrier and a passive sub-slab venting system in place, the project team addressed vapor intrusion concerns at a sensitive environmental redevelopment site—supporting long-term protection beneath the slab.