Introduction
The SEL Virtual Curtain Gas Migration System is the ideal solution to intercept, treat and control lateral migrating ground gas. The system has been used on numerous commercial and residential projects where ground gas within or adjacent to the development posed an issue. The system has been successfully installed on many development sites over the last 20 years and is a realistic alternative to a physical gas barrier and gravel vent trench.This unique patented system comprises a series of vertical vent nodes connected together to create a zone of low pressure within the ground that attracts and dilutes ground gases to acceptable levels, provide an appropriate pathway break and conduit for controlled and safe passive venting to atmosphere. The virtual curtain system can form a fundamental part of any remediation strategy to satisfy the requirements of Part 2A of the Environmental Protection Act (1990) determination and enable developments on contaminated land (closed landfill sites) or near it.
