Bespoke sampling strategy for waste characterisation brings significant financial savings

Site Assessments Geotechnical Support Materials Management Remediation Environmental Management & Compliance

A bespoke sampling strategy was designed to map the extent of hazardous soils around known areas of contamination at a former train depot and with these results a sampling grid was created, made up of cells, to provide the client an easy way of isolating and removing the affected areas. This mapping enabled the client to isolate the areas that fell within the hazardous waste threshold and allowed them to significantly reduce the cost of disposal of the soils by screening out the non-hazardous material that EPS’ additional testing and the grid mapping identified.

Project: EPS was commissioned to undertake a ground investigation and provide further waste characterisation in an attempt to delineate the extent of hazardous soils at a former train maintenance depot and to ensure the imported aggregate met the strict highways standards.

Nature of Site: Roughly 1.2ha site of an old Train Maintenance Depot (TMD) which provided stabling, servicing and maintenance for class 730 trains, stabling for class 230 trains and additional minor works.

Scope: Ground investigation consisted of 23 trial pits to a maximum depth of 1.5m and 23 composite waste analysis suites from each of the 23 tested cells around the grid. Analysis and delineation of two separate stockpiles for removal.

Client: Demolition contractor

Duration of works: Over 5 months as the groundworks were carried out