Case Study - Woolston Asbestos
|Contract In Brief:|
|Vosper Thornycroft Site,Southampton||SEEDA||Campbell Reith|
|HBR Role:||Form of Contract:||Contract Period:|
|Main Contractor||ICE Minor Works||6 wks|
|Contract Value:||Contract Start:|
|HBR Site Management|
|Contracts Manager:||Project Manager:||Site Manager:|
|Roger Lyes||Godfrey Millinson||Mark Wade|
|Water Treatment||ü||Infrastructure||ü||Soils Washing||ü|
The Vosper Thornycroft site was used for boat and engine construction throughout the 20th century during which time many processes had contaminated the soil and ground water. The owner, SEEDA wished to identify a method of remediating the extensive quantities of asbestos contaminated soils to avoid off site disposal during the programmed site wide remediation contract.
HBR were requested to trial various methods including traditional hand pick, specially designed screening system and soils washing.
The trial was also required to provide a better delineation of the asbestos contamination and to demonstrate the optimum re-use of the screened remediated soils for engineering purposes. This included trials of mixing, moisture conditioning and cement / lime stabilisation.
Trial holes were excavated to depths of up to 9m in order to map the lateral and vertical extent of the contamination, the made ground deposits and the underlying granular materials.
The site was bordered by residential developments on three sides and therefore required detailed discussions with the Regulators to allow the screening of the asbestos contaminated soils. Extensive perimeter and operation monitoring was carried out in order to establish the fibre availability and to measure the effectiveness of water spraying from various applications.
Following the trials HBR prepared a process evaluation report which formed the basis of a treatability report for the tender documents for the site wide remediation phase.
Asbestos in the form of rope, sheets, lagging, Modified baby screener for
fibres and bonded were encountered at various depths first stage separation
|Chemical v Physical v Biologicalv Complex Sorting v Water Treatmentsv Complimentary Processes|