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Woolston Asbestos

Case Study - Woolston Asbestos

Contract In Brief:  
Location: Client: Employers Representative:
Vosper Thornycroft Site,
Southampton
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:  
£90000 Jan—Mar 2007  
HBR Site Management    
Contracts Manager: Project Manager: Site Manager: 
Roger Lyes Godfrey Millinson Mark Wade
Services Included:     
Bioremediation ü Stabilisation ü Complex Screening ü
Water Treatment ü Infrastructure ü  Soils Washing ü 

Contract Summary:

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

Woolston Asbestos - HBR Remediation - 2007

                 Chemical v Physical v Biologicalv Complex Sorting v Water Treatmentsv Complimentary Processes

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