The scheme comprises the redevelopment of a former mixed use site in Kent. The project involves the demolition of the former furniture factory and its infrastructure, and the construction of a residential development including terraces of two and three storey houses with private domestic gardens and seven four storey blocks of flats. A building containing a large gymnasium at first floor level with car parking below is proposed and the remainder is planned as new accessible public facility. The proposed development will also include new access roads, permeable hard surfaced parking areas and soft landscaping.

The remediation required is for the removal of asbestos containing materials and hydrocarbon contamination (total petroleum hydrocarbon; TPH; and polycyclic aromatic hydrocarbons: PAH), associated with the made ground at the former factory site

Cognition’s proposal will carefully segregate and treat the materials being excavated to ensure the correct treatment. The MTL is for stockpiling, screening, stabilisation and bioremediation to achieve the above.

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Material on site will be excavated to form stockpiles. In order to ensure the integrity and containment of the treatment area, Cognition will take samples of the treatment area pre and post works being carried out on site. This will ensure that levels of contamination have not changed over the course of the works.

Hand-picking of stockpiled materials for profiled asbestos sheet will be carried out by hand and excavator. The areas to be excavated will be damped down using a hand held sprayer fed by a portable bowser or similar. Suspected ACM will be removed and double bagged in plastic bags and placed in a locked skip prior to licensed disposal.

The material will be then assessed by Cognition chemists using olfactory methods and laboratory tests. If the material requires treatment then bioremediation will be carried out on the contaminated material depending on the levels of contamination. Metal contaminated materials will be stabilised with lime or cement for engineering purposes. The material will be stabilised using a rotavator type plant to ensure a heterogeneous mix through the material; for smaller volumes of material stabilisation will be achieved by mixing the lime with an excavator.