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Former Chemical Works

Sirius demolished this 25 hectare former chemical works and undertook remediation to enable residential development. Careful planning and implementation of both activities enabled recycling of all “hard” materials on the site as part of 200,000 cubic metres of earthworks. A series of fully remediated development platforms were delivered that had been engineered to allow developers a choice of foundation options.

Client Name: Starford Holdings




Project Description

This site comprised a former chemical works occupying some 25 hectares. Works included the remediation of contaminated soil ‘hotspots’, removal of non-licensable asbestos-containing materials and the demolition of extensive above and below ground structures, including former buildings, relict foundations dating back to the First World War, and 24 former settling tanks measuring up to 100m in diameter and 10m deep.

Sirius was responsible for the remediation design, as well as developing and implementing a robust verification strategy. Site levels were subject to re-engineering with all ‘hard’ material processed on site and recycled as part of a 200,000m3 earthworks scheme, which delivered a series of fully remediated development platforms, allowing developers a choice of foundation options.

A key element of the demolition was the removal of a 70m tall reinforced concrete chimney which had dominated the Hartlepool skyline for many years. Sirius engaged a specialist sub-contractor who completed this using a controlled explosion. Naturally, such an event generated a great deal of community interest and, as well as co-ordinating the local media, Sirius, as part of their active Corporate Social Responsibility programme, hosted a charity-fund raising event for the local hospice and RNLI station.


Sirius’ early involvement allowed the remedial works to be designed to retain the maximum amount of material on-site, providing a cost-effective and environmentally sustainable outcome for the vendor and purchaser. Careful programing of the works ensured no disturbance to local sea bird life and ensured that local historians could glean the maximum information from exposed relict foundations

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