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Environmental services for a proposed housing development on a vacant industrial site.
Housing - London
Iceland Wharf is a mixed-use development on a vacant industrial site of 1.25 acres in Hackney Wick, London E3. The scheme comprised 120 new homes (35% affordable) and 41,000 sq ft of commercial space.
Following successful planning in 2018, Curtins were commissioned by the housing association to support the discharge of pre-commencement planning conditions, relating to geo-environmental services comprising a contamination risk assessment and remediation strategy.
Up to this point, the development site had ‘stalled’ with previous consultants and developers unable to secure discharge of pre-commencement conditions.
The site was historically an Ammonia Works with the presence of historical gasworks by-products (ammoniacal liquor, tars and blue spent oxide) onsite, and a considerable legacy of contamination, located directly adjacent to the River Lea (canal).
A comprehensive review of previous information highlighted insufficient information to design a Remediation Strategy.
Curtins designed and undertook robust further ground investigation works to inform the planning data gaps and to further assess the potential contamination risk. The results of the works were able to refine the existing contaminant sources areas onsite, and areas of the site where potential gross or mobile phase contamination were present.
Given this determined risk assessment and robust further investigation, the subsequent Remediation Strategy did not require active remediation of contaminant sources. Only the following recommendations during enabling works were required to form a suitable development site:
Removal of all potentiawl underground storage tanks, outfalls/drainage, sub-surface features and structures.
Removal of any free phase product or organic solids (Tar – solid/globules), if encountered.
As part of the Remediation Strategy, Curtins derived site-specific vapour contaminant trigger values during the remedial works programme to ensure no contaminant vapour risks to adjacent residents.
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