Asbestos and hazardous waste management

Keltbray’s specialist capabilities comprehensively cover the management and removal of asbestos and other hazardous waste materials, such as lead, radiological, chemical and biological contamination, and operate within a wide range of sectors, including defence, Government, transport, heritage, leisure and energy including nuclear, commercial and retail.

– Full service coverage throughout the UK from a number of regional offices, many now with accredited training facilities. – Holders of a full 3-year HSE asbestos licence – Three-way ISO accredited for quality, environmental and health and safety standards – Innovation-driven to create real customer value, delivering programme, cost, sustainability and safety benefits.

Asbestos was a popular post-war building material and is still found in many aspects of ageing structures due to its flexibility of form and function. Asbestos and the dust it emits is extremely hazardous and it is essential that the levels and types of asbestos that exist within a project locality are quickly and accurately determined, and then monitored by qualified technicians who can safely handle all industrial asbestos waste categories. Keltbray has a highly experienced, qualified and client-focused team of specialists, and the capability to design an asbestos risk/ hazardous waste assessment and management plan in line with industry regulations. The company has all the required Health & Safety Executive (HSE) licences in place to achieve full regulatory compliance and peace of mind. In addition to the necessary HSE asbestos licences, Keltbray is also ISO accredited for Quality, Environmental and Health and Safety standards, and operates its own licensed transfer stations under Environment Agency Guidelines. Keltbray’s Asbestos Management team offers a dedicated 24-hour Emergency Response service and can quickly mobilise teams of experts to manage and mitigate risk in crises situations.

KELTBRAY’S TREATMENT SOLUTIONS COVER:

Technical delivery

Ensuring all organisations are complying with all necessary regulations.

Removal and encapsulation

All projects we undertake are managed to comply with industry legislation, approved codes of practice and HSE guidance notes.

Emergency response

Our technical staff are on hand to provide advice and have specialised equipment and vehicles ready to mobilise from strategic centres throughout the UK.

Waste Transfer Station

Keltbray operates EA licensed waste transfer stations, offering local practical solutions for the disposal of asbestos waste.

Management and training

Asbestos awareness is an essential part of training for any person likely to come into contact with asbestos containing materials (ACMs).

Industry accreditation

Keltbray holds maximum term Asbestos Licenses both in Great Britain with the HSE and in Northern Ireland with the HSENI and have full UK coverage.

Our project portfolio

DECOMMISSIONING Ferrybridge Power Station

Following an intensive tendering process assessed by Scottish and Southern Electricity on a SafetyQuality-Cost basis, Keltbray’s decommissioning team was awarded the 30-month contract as Principal Designer and Contractor. Work commenced on site in October 2018, employing up to 220 staff including subcontractors. The works scope involves the removal of all hazardous materials, mainly asbestos, and the phased demolition of all other structures to grade level. Demolition of the main heavy steel structures is being carried out utilising a combination of heavy demolition machinery and the controlled use of Linear Shaped Cutting Charge (LSC’s) explosives. Only five of the eight cooling towers are to be demolished – the first being carried out in July 2019 by blasting both the Shell and Legs to enhance directional control of the collapsing structure. This tower was in a relatively unconstrained location and was demolished in advance of the main event to trial the proposed Shell and Legs demolition methodology. Having proven the design, the remaining 4 towers, two of which were very close to overhead HV lines, were demolished in October 2019 with test blasting of LSC’s also carried out that day. The Cooling Towers all collapsed in accordance with the design, 95% of the shell superstructures falling inside the base pond perimeter walls. The LSC test blasting on representative box columns with steel thickness up to 68mm also yielded the required results. The material from the Cooling Towers, in line with Keltbray’s recycling philosophy, will be crushed and reused on site. A program of works will see the demolition of the remaining structures including the main boiler house, two 198-metre tall chimneys and the barge unloader, which is situated nearby on the banks of the River Aire. The success of the project thus far has been the result of close collaboration between the project teams of Keltbray and SSE and the good co-operation of the major subcontractors.

SOIL AND CONSTRUCTION WASTE MANAGEMENT

Keltbray provides a full range of outlet options for construction materials using transparent audit trails. Following chemical analysis to determine composition and identify any hazardous components, materials are classified in accordance with the waste classification codes, including List of Waste (LoW), the European Waste Catalogue (EWC) and Hazardous Waste Regulations. As a forward thinking organisation, we utilise innovative techniques that are project-bespoke depending on treatment requirements, and can include physical separation (screening), chemical or biological methods. Keltbray’s team of scientists and professionals are qualified in line with CIWM/WAMITAB Operator Competence scheme in waste management and provide independent laboratory testing services that are accredited to UKAS ISO 17025 Standard and the Environment Agency MCERTS (for soils) scheme for quality and compliance purposes. While road transport will always be integral to its service offering, the company is increasingly exploring a range of diverse sustainable ways to service customers. In London, the convenience and effectiveness of the River Thames is exploited with waste being barged to treatment sites to reduce carbon emissions and save resources. This methodology has proved highly efficient and effective on the Thames Tideway Tunnel Project.

REMEDIATION Worthy Down Barracks

Keltbray successfully completed the complex remedial works at the Worthy Down Barracks (5km north of Winchester, Hampshire), consisting of approximately 52 hectares of land occupied by an existing MOD facility and an area of adjacent agricultural land. The works were part of Project Wellesley, the MOD’s redevelopment of land and the existing military training camp (Worthy Down Camp). Numerous historic investigations and studies dating back to 2009 identified widespread Asbestos Containing Materials (ACM) and free asbestos fibres in excess of acceptable human health concentrations in the made ground and shallow soils across the site. Hotspots associated to specific point sources such as underground storage tanks were also identified with elevated concentrations (above relevant screening criteria) of Poly Aromatic Hydrocarbons (PAHs), Total Petroleum Hydrocarbons (TPHs) and Lead were also identified as requiring remedial measures to mitigate the ongoing and future risks from these contaminants. The remediation strategy involved breaking the Pollutant Linkages (PLs) through the widespread excavation of the impacted made ground, which in turn allowed for the installation of a certified break / engineered cover system to be installed within the construction makeup. Earthworks levels required to facilitate onward redevelopment of the site were used to guide excavation depth with reference to the minimum thickness of engineered cover system that was required. In addition to the engineered cover system, remediation was delivered within ‘service corridors’ to allow third party contractors to install services and general utilities without the risk of encountering potential asbestos containing materials. The Worthy Down ‘Project Wellesley’ Scheme represents the largest of a number of enabling and remediation schemes delivered by Keltbray as a specialist remediation service provider.

ASBESTOS AND HAZARDOUS WASTE MANAGEMENT Battersea Power Station

Keltbray was contracted to undertake both licensed and non-licensed asbestos works which included removing Durasteel panels, asbestos pipe lagging and asbestos dust residue and debris from various pipeworks, floor penetrations, floors and walls throughout the Power Station complex. Quantities of asbestos removed: – Pipe lagging: 5000 linear metres – Asbestos residue to walls and floors: 10,000m² – Durasteel panels 5,000m²

Much of the works were undertaken within the confines of sealed enclosures, placed under negative pressure and whilst the magnitude of the site afforded us the opportunity to create expansive enclosures (the largest = 10,000m³), we also needed to ensure that we would be able to control air flow so we remained compliant with HSE requirements and our own internal procedures. Works were undertaken within a live environment with many contractors on site, which required pre-commencement and inprocess communications with all other associated stakeholders to ensure all were aware of the extent of our works. We also ensured suitable barriers, warning signs and information boards were put in place. The confined space elements of work require extensive pre-commencement training and permit to work protocol. All equipment was in accordance with our procedures and fully maintained throughout our works. As additional works were discovered throughout the project, our management team required the necessary resources on a daily basis to ensure all works were completed in accordance with our works programme.

Sustainability framework

To redefine the way sustainable development is delivered.

Keltbray’s clear and guiding Purpose closely aligns with our long-standing reputation for innovation and delivery certainty, and with the millions of people who rely on our products every day. At Keltbray we are working to create a sustainable future by combining integrity and smart innovation to meet, to the greatest extent possible, the balanced needs of all our stakeholders. We are focused on enhancing the quality and value of our business through the disciplined allocation of our resources to meet the demands and expectations of our changing world, so that we grow our business safely, sustainably and responsibly, for the benefit of all.

Darren James

Chief Executive Officer Sustainability runs through everything we do. From the people we support, the company we sustain, the local communities we work in, the industry we represent and the planet we live on.

The construction and infrastructure industry is very materials and resource intensive, with huge pressures exerted on the natural environment at every stage of a project’s lifecycle. Sustainability is therefore mutually beneficial to both the natural environment and our business, aiding us to use resources efficiently to create longterm sustainable value, build resilience to environmental and social pressures, as well as minimise risks throughout our supply chain to drive economic growth. Managing the environmental, social and economic pillars holistically is key to protecting our environment, supporting local communities, serving our customers, sustaining the economy and helping wider society thrive. The areas of focus opposite have been identified as being integral to Keltbray, based on a materiality assessment of their impact on our business, and they therefore set the framework for the Group’s Sustainability approach and programmes of work.

* The UK construction industry accounts for:

45%

of the UK’s total carbon emissions, 60% of material use while creating a third of waste generated

3.1m

employment opportunities created

9%

of the UK’s total economy as defined by Gross Domestic Product (GDP)

* Source: The Office for National Statistics

Environment review

OBJECTIVES AND SMART KPIS

Decarbonise our operations to achieve Net Zero and assist our clients in meeting their individual pledges – Set science based target 2020 – Achieve Net Zero by 2050 – Assist our clients in meeting their own

Net Zero timeline

Protect the environment and enhance biodiversity to ensure we leave a better environment than the one we found – Zero major environmental incidents – Our business and projects to have a zero net biodiversity loss and identify opportunities for biodiversity net gain

Use resources more efficiently, maximising their life cycle to drive circular economy – Zero non-hazardous waste to landfill – Define scope of water and material usage and set reduction targets for all divisions of Keltbray Group

ACTION AGENDA

– Climate action – Carbon footprint and energy efficiency – Biodiversity – Waste and the circular economy – Water usage – Materials and responsible sourcing Keltbray's sustainability pledge is to provide innovative building and infrastructure engineering solutions that generate value to our customers and support their own sustainability commitments, whilst playing our own part in addressing the global challenges determined by the UN Sustainable Development Goals

This report was written, designed and produced by Keltbray Group Proposals and Corporate Communications Team. No part of it may be reproduced without the prior permission of Keltbray Holdings Limited.

INNOVATION IN ENGINEERING

St Andrew’s House Portsmouth Road Esher, Surrey KT10 9TA

T: +44 (0) 20 7643 1000 E: enquiries@keltbray.com

www.keltbray.com

© This document is the copyright of Keltbray Holdings Limited.

Any unauthorised reproduction or usage by any person other than the addressee is strictly prohibited.