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Growing pressure to re-use browneld sites has stimulated a new wave of expertise in site preparation




WSP Remediation was formed in 1999 and is already one of the UK's leading land-remediation specialists. Growth has been fuelled by a comm itment to innovat ion and customer service.

WSP has responded to developments in brownfield regeneration by developing a range of in-house techniques, including a number of new physical, biological and chemical treatments to improve soil and reduce groundwater contamination.

A typical project is the £2.2 million remediation of a 22.5 ha former industrial site at Breme Park, Bromsgrove, for house builder Persimmon Homes.

Undertaken on a fixed-price basis, the contract required WSP to remove and treat soils saturated with oil and contaminated with asbestos. The company designed an integrated solut ion to recover 15,000 litres of free material from 350 groundwater wells and treat 26,000 cu m of hydrocarbon-impact soil using its own bioremediation method.

What the judges said: 'Excellent bioremediation capability ? the client testimonials were glowing.' 'It's a brave company that gives a fixed price for this kind of work.'

FINALIST: WALRERS UK Aberdare-based Walters has notched up several high-profile remediation projects, especially in its native Wales. One of its most recent successes was the Castlegate development, in Caerphilly, involving the clean-up of a landfill site for the building of affordable housing.

Careful planning and close liaison with the Environment Agency and Caerphilly Borough Council was vital to the success of this difficult project. The remediation strategy included the removal of buried drum waste cells and all other contamination from the upper 2.5 m of the ground , as well as isolated contamination 'hotspots' from below 2.5 m. A vapour and ground gas protection barrier was installed and the whole area capped with clean, imported fill.

FINALIST: SUMO Sumo specialises in sub-surface detection of buried services.

Formed only four years ago, the company has developed new technology incorporating ground-penetrating rada and radio frequency locators to provide an invaluable service to the construction industry.

The company has its origins in the 1980s when, in the wake of the Falklands War, company founder Dr Richard Chignell was asked by the MoD to develop a device that could detect plastic landmines.

The resulting technology evolved into Pipehawk, a GPR system used extensively in construction today.

In 2001, Pipehawk merged with another company, Franchise Concepts, to form Sumo, now the largest supplier of GPR surveys in Europe.