Why the site required a terram non woven geotextile membrane

As part of the grow your own planning and construction process and a requirement of the land lease a terram non woven geotextile membrane plus anti dig mesh was required to areas planted during the construction process. This included; planted borders, lawn areas and the north banking area. Planters were also lined with the membrane. As it was established before the construction process began that the previously created banking adjacent to the railway line may; hold contaminants, is home to protected species, and would remain unchanged and not be disturbed or replanted in the future the banking adjacent to the railway line did not require the membrane.

Local environmental officers advised that the membrane had to be installed to all areas which would be planted during construction to provide an easily visible separation of potential contaminants from the old ground mixing with the newly introduced uncontaminated soil in the planted areas, lawns and raised planters. It would prevent the upward movement of any potential contaminant particles. As a condition of the land lease care has to be taken not to compromise the membrane and not to disturb the surface of any pathways. Each delivery of imported soil had to be tested before use to ensure it was to the correct standard.

Reference: Site Remediation Survey and Strategy