Following the stockpiling and hand-picking of soils, a visual inspection was carried out and representative samples were taken from both the reduced level void of the site area, the stockpiled material and the surface level immediately surrounding the site area to test for asbestos contamination. This revealed no visual evidence of asbestos containing materials in the vast majority of the void and soils excavated, with the exception of a thin band of materials at ~2.0m depth, where the site levels had been raised.
Given the depth at which these materials were encountered, beyond any zone of influence from end-users and given the end-use was a landscaped garden, it was concluded that the site area where remediation had been undertaken was now safe for its intended use.
Exercising the in-situ method of remediation kept costs and the resulting delay to the client’s move-in date to a minimum. It also significantly reduced the environmental impact by removing the need for road transport to a disposal site.