Redevelopment of brownfield sites for more sensitive residential end uses often requires site wide remedial risk mitigation measures to satisfy regulatory and building control related requirements.
Placing a cost upon these aspects is often one of the most challenging aspects to any potential development company as the degree of uncertainty and associated cost risk is much higher. This reflects the inherent variability of physical and chemical soil characteristics across a site with a long history of previous development and the complexity of site characterisation to inform likely foundation, drainage and infrastructure costs including off site disposal of surplus development arisings.
There are often no simple quick fix solutions where sites contain made ground of mixed origin with differing relative contaminant loadings and different related potential human health risks and the best advice we can give is at the inception where the design can be integrated to offset as much of the residual uncertainty as possible with the aim of minimising specialist remedial works.
T&P has undertaken contracting services across a wide variety of sites using a wide variety of techniques including bio-remediation, excavation and disposal, waste minimisation, segregation and screening, regrading and reprofiling using the CL:AIRE Definition of Waste Code of Practice and ex-situ and in situ groundwater treatment. The majority of these aspects have been carried out as part of an integrated approach and as has been commonly preferred a lump sum basis where T&P take on the residual risk.