| scotland
REGENERATION FROM GLASGOW REMEDIATION F
ollowing on from their successes when completing preparation works for the 2014 Commonwealth Games Athletes Village and treating Hexavalant Chromium at Shawfield, specialist remediation contractor VHE secured yet another major regeneration project in Glasgow. The Sighthill Transformational Regeneration Area involved remediation of the largest regeneration area in the UK outside of London.
The ambitious five year project is being delivered by Transforming Communities: Glasgow, a partnership between Glasgow City Council, Glasgow Housing Association and the Scottish Government. The £250 million project aims to transform an existing residential and public open space into a new and improved development encompassing a community centre, low level residential housing, amenity parkland and an education campus to incorporate two schools currently occupying the site. VHE were awarded the contract as Principal Contractor to deliver a major design and build remediation scheme. Contract 1, for which VHE employed WYG as designer, covered 50 hectares and was the first contract awarded for the regeneration and redevelopment of the Sighthill area.
The site, prior to its current use, encompassed numerous industrial activities including chemical works, rail facilities, brickworks and engineering works. VHE carried out classification of materials, site investigation works, site clearance, demolition, deep grouting, drainage diversions and infrastructure works in addition to a major materials management exercise to successfully remediate the site and create the development platform. The works included significant volumes of ex-situ treatment of contaminated soils from historical former uses of the site as well as the in-situ management of Galligu, the waste produced from soda ash (alkali) manufacture. The former St Rollox Chemical
Aerial view of Sighthill
works which produced nearly one million cubic metres of by-product, termed Galligu, is manmade and does not conform to any classification (geo-technically or chemically) as it is variable in nature, colour, properties and composition as the process producing it as waste was developed over time and was not consistent. The methodology of identification was fundamental to the success of the remediation of the site as this material could impact on ground water and potentially generate Hydrogen Sulphide gas. VHE identified value engineering and risk management potential that saw elements of the Contract 2 infrastructure works be incorporated into Contract 1. These elements were relating to geo- environmental aspects of the overall project. Rather than focus on the remediation elements in targeted areas the VHE value engineering proposal suggested widening the scope to encompass all of the available site and therefore being able to utilise all the available material in its most economic and environmentally beneficial location, minimising waste overall, cross
contamination potential and warranty issues.
With over 1.2m3 of material
movements on the site the overall project also benefited from a seamless traceability and verification process. By negotiating an increased scope VHE saved the client both time and money.
Sighthill Picking Station 42
VHE also considered cultural heritage management and mitigation in terms of archaeology and specifically the historical standing stones. The stone circle at Sighthill Park, known as the Sighthill Megalith, were temporarily removed and will be reincorporated into the final development. During the £11 million contract, that commenced in January 2016 and completed in November 2017, VHE received two Performance Beyond Compliance certificates awarded under the rules of the Considerate Contractors programme and have been shortlisted for a 2018 Ground Engineering Award in the Geo- Environmental Project of the Year category. As work at Sighthill continued VHE expanded their team and presence in Scotland. Employing local people is standard operating practice for VHE wherever they have developed long term project opportunities, accordingly in Scotland they recruited and upskilled a number of employees at all levels who continue to be employed by the company. Improvement of this area in Glasgow adds to VHE’s comprehensive portfolio of treating a vast range of industrial legacy ground conditions and further enhances their reputation as one of the UK’s leading remediation contractors. For more information visit
vhe.co.uk or follow VHE Construction on LinkedIn.
COMMERCIAL PROPERTY MONTHLY 2018
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