Waste Management
Planning, Design, Construction, Compliance and Decommissioning.
About Ayesa Engineering
A global leader in engineering services
For almost 60 years, Ayesa Engineering’s multidisciplinary teams have successfully delivered significant large-scale projects worldwide while staying true to their guiding principles of “making it happen”. Today, the company is a global provider of engineering services, specialising in over 40 disciplines and with an active presence in 16+ countries.
Ayesa Engineering’s expansion into various sectors and geographic locations has played a significant role in its growth, ultimately leading to its position as one of the 50 largest engineering firms globally.
In 2025, Ayesa Engineering grew to 3,200 professionals united in the shared goal of developing solutions that foster a new, improved, sustainable and digitally-oriented world.
World Rankings
#43 ENR 2025 Top 225 International Engineering Design Firms
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#61 WA100 2026, Building Design Top Architects
#18 Geplus.co.uk Top 50 Geotechnical Consultants (UK) 2025
ENR 2025 Top International Design Firms (sector)
#24 Transportation #14 Water Supply
#20 Marine & Port #50 Sewer & Solid Waste
#38 Oil & Gas #35 Industrial Process
#18 Highways #11 Rail and Mass Transit
#18 Water Treatment
Waste Management
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Our Approach
Lasting Positive Impacts
We offer the highest standards of design, project management and stakeholder collaboration to realise optimum project solutions. Our engineering consultants are among the very best in their fields. Continuous involvement in challenging projects maintains and enhances our high standards of technical excellence.
People Centric
We invest in our staff to deliver a positive, enriching, safe and empowering work experience at Ayesa Engineering. We are committed to equality, diversity and inclusion to provide a place where everyone can thrive. We invest significantly in training and development to keep our staff at the cutting edge of their industry. Our focus is on positively influencing those SDGs most applicable to us in our role as a leading engineering consultant. Everything from CO2 emissions, water reduction, social value, health and wellbeing, community engagement, apprenticeships, and safe working.
An End-to End Partner
Our company is built on relationships and superior client care. We deliver on our unwavering commitment to assist our clients in achieving their desired results. We are agile and responsive and build a collaborative framework across stakeholders for project success.
Bridging the Gap
We are seasoned in managing projects and supervising construction phases of projects across the project lifecycle. We help clients “bridge the gap” across all relevant stakeholders within a project. We seek to understand the needs, constraints, opportunities and to optimise solutions.
Utilising Relationships
Getting a project off to the right start and mitigating any delays helps to keep costs down - Our team has forged close working relationships with environmental authorities and regulators throughout the regions we operate in, enabling us to expeditiously progress projects through the permitting, construction, verification and site closure.
Innovation and Sustainability
We offer innovation with a deep understanding of environmental issues such as climate change and sustainability, waste to energy, renewables to deliver maximum value to clients.
Proven Track Record
We have extensive experience across a broad range of sectors. We currently sit on a number of frameworks, such as Irish Water, Port of Cork, Oil and Pipeline Agency, Waterways Ireland, Gas Networks Ireland, Irish Rail, Fusion 21 and Translink.
Client Focused
Our culture focuses on developing strong working relationships with clients who continue to work with us based on the value we provide. Our clients are in both the public and private sector and range from major companies and national regulatory organisations to smaller regional organisations providing optimum solutions for significant infrastructure projects and local sites.
Technical Excellence
We keep our clients informed of the implications of legislative changes to their businesses and manage stakeholder engagement to help progress projects in a profitable yet environmentally compliant manner. Our proactive approach helps you to benefit from our expertise in a constantly changing regulatory environment.
Multi-Disciplinary Safety First
We advance safety, applying rigorous processes that manage technical, environmental and social risks and hold ISO 45001:2018 – the internationally recognised standard for occupational health and safety management systems.
We provide engineering and design consultancy services across ten sectors: marine and coastal, geoscience, buildings, transportation, energy, environment, water, flooding, waste management, and conservation.
Sector: Waste Management
A leading innovator at the forefront of the waste management industry
For over 20 years, our team of professional engineers and environmental experts has delivered world-class advisory, environmental, and engineering consulting services, shaping the waste management industry.
Our integrated, multidisciplinary teams in the UK, Ireland, and the Middle East offer a full spectrum of support:
• Design of waste facilities (landfills and treatment plants)
• Permitting and environmental compliance guidance
• Operational support for waste management facilities, ensuring protection of communities and the environment
• Advisory services for both public and private sector clients
We operate across the commercial, industrial, municipal, radiological, construction and renewable energy sectors. We also provide our clients with practical training and workshops in specialist areas such as landfill engineering, geotechnics, geosynthetics installation, monitoring, compliance and sustainability. For example, we are contracted to the UK Environment Agency to provide their staff with training in Advanced Landfill Engineering.
Supporting clients throughout the full lifecycle of waste management and their facilities:
• New site evaluation
• Detailed design of hazardous and non-hazardous waste facilities
• Operations and permit compliance
• Environmental assessment studies and securing regulatory permits
• Construction support, including contract management, works supervision and Construction Quality Assurance (CQA) services
• Monitoring programmes to analyse impacts to the environment and surrounding ecosystems
At the end of the facility’s lifecycle - we assist in closure, permit surrender and site remediation.
Design and Delivery of Global Landfill Expertise
We have been instrumental in delivering some of the world’s most significant landfill development projects, including the expansive 18-million-cubic-metre triplelandfill complex at Oman’s Sohar Industrial Waste Handling and Treatment Facility (IWHTF).
Our contributions included thorough environmental studies, the development of a 30-year site masterplan, and the detailed design and construction supervision of Class I hazardous, Class II nonhazardous, and inert landfills. This landmark project not only highlights our expertise in large-scale waste management but also underscores our commitment to environmental protection and sustainability.
Waste Management Solutions
Ayesa Engineering delivers comprehensive waste management solutions tailored to both private and public-sector clients, addressing every aspect from waste minimisation and recycling to treatment, disposal, and energy recovery.
Operating in one of the most highly regulated and complex industries, our senior staff, with over 25 years of experience, expertly guide clients through every phase of the waste management lifecycle. Our in-house team includes specialists in waste permitting, chemistry, hydrogeology, geotechnical and civil engineering, geology, ecology, solid and liquid waste treatment, gas management, waste planning, environmental and social impact assessments, as well as environmental monitoring and auditing.
This diverse expertise enables us to provide customised solutions that effectively navigate the most challenging regulatory and operational demands within the waste sector.
Waste Facility Permitting & Licensing
Our understanding of the waste facility permitting and licensing process end-to-end provides a holistic service.
We bridge the gap across all stakeholders, the client, contractors, planning and regulatory authorities and public consultation, where needed.
Helping waste clients meet obligations
European and national environmental legislation impose stringent legislative controls over a wide range of industrial and commercial activities. The legislation requires operators of ‘regulated facilities’ to obtain the appropriate permit to operate or discharge substances to air, water or land. The aim of the legislative regime is to protect the environment and to promote best practice in the operation of the regulated facilities.
Assisting Planning and Construction through permitting and licensing
Our teams have many years of experience in supporting planning applications, obtaining environmental permits, and supporting the construction of regulated facilities in the most costeffective way. We work with operators to provide permit compliance by environmental monitoring and reporting services. In addition, our analyses supports validation operational issues by ensuring compliance with waste acceptance procedures and practices.
Client Due Diligence
We prepare permit variations to comply with changing legislational operational practices and to facilitate change of operator through permit transfers. Our environmental monitoring data can also feed into risk assessment and management strategies to ensure compliance with the permit licence. These monitoring services can form the basis of the eventual permit surrender application.
Assessments to support Permit Processes
To support permit processes we provide environmental risk assessments; landfill gas risk assessments; hydrogeological risk assessments; stability risk assessments; fire prevention plans; odour and pest risk assessments and management plans; and environmental management systems.
Experienced with Hazardous and Non-Hazardous Facilities
We have worked across all developmental phases on behalf of a broad range of facilities, including hazardous, non-hazardous and inert landfill sites, Material Recycling Facilities (MRF), Mechanical Biological Treatment (MBT) facilities, In-Vessel Compositing (IVC) facilities, Authorised Treatment Facilities (ATF) for end-of-life vehicles, and bespoke facilities e.g. ship and oil rig decommissioning. In addition, our permitting experience extends to a wider range of industrial processes, including nonferrous metal melting, wood treatment, wood combustion and mineral extraction and processing.
Site Selection, Permit, Design of Solid Waste Disposal and Modern Waste Facilities
We help clients in many ways, consulting on site selection, permit application, or design new solid waste disposal facilities or upgrade existing facilities, ensuring optimum solutions for capacity, staging and community acceptance. Our team have advised on planning, permitting and construction of modern waste facilities. Our aim is to progress projects on time, on budget and cost-effectively. We consider the impacts of alternative technologies in integrated waste management systems.
When you work with Ayesa Engineering, you can be assured our experts understand the latest technical issues, regulatory drivers and the commercial pressures of the waste industry.
Waste Facility Permitting & Licensing Services
We assist clients in obtaining permits across a diverse range of areas, specialising in waste management and resource recovery
• Solid Waste Management and Disposal Municipal Waste Facility
• Landfill Development and remediation for repurpose
• Waste to Energy Facilities
• Quarry Mines and Tips
• Urban Development
• Water Abstraction and Wastewater Teatment and Discharge
• Air Quality and Emissions to Atmosphere
• Reclamation and Dredging
• Flood Defence, Stormwater Management and Land Drainage
• Mineral and Resources Extraction
Environmental Permitting Services
• Applications for Environment Agency, NRW, SEPA and Local Authority regulated permits and discharge consents
• Air dispersion modelling
• Bioaerosol risk assessments
• Cost/benefit analysis of current post-closure management fees against likely surrender application costs
• Environmental Risk Assessments (ERA)
• Erosion control
• Expert witness support following legal action by the regulator
• Hydrogeological and hydrological risk assessments
• Landfill engineering and waste stability and settlement risk assessments
• Landfill gas risk assessments and carbon dioxide ICoP-based compliance limit reviews
• Management and emissions management plans: e.g. odour, fugitive emissions and noise and vibration
• Master planning and environmental management systems
• Permit variations, consolidation, transfers and surrender
• Post-closure restoration schemes using appropriate regulatory framework and permission
• Pro-active liaison with the environmental regulators, planning authorities and local authorities
• Site closure plans
• Waste assessment and classification
• Waste recovery advice for permit applications
• Review of subsistence fee calculations
• Installation and monitoring of emissions to air, land and water
• Auditing of monitoring infrastructure to ensure it is fit for purpose and recommendation of remedial measures if required
• Auditing and due diligence
• Holistic approach to data management including sampling of monitoring points, chain of custody of analytical data, review against compliance limits (if required), and presentation of data to client or regulator
Environmental Monitoring & Permit Compliance Services Planning And Legal Services
• Design of environmental monitoring schemes per with permit requirements
• Installation of monitoring boreholes including surveying and CQA supervision
• Provision of competent field monitoring technicians with appropriate transport to remote and location-sensitive sites.
• Tendering, instruction and management of competitively costed 3rd party laboratory services
Our established relationships with environmental regulators, planning and local authorities help to progress projects
• Desk-based studies, site investigations and environmental monitoring
• Human Health and Environmental Risk Assessments (HHRA)
• Pilot studies/remediation trials
• Project management support (contract support, resident engineer, verification of works)
• Regulatory support (liaison planning, environmental health, EA, EPA, Supreme Council of the Environment Building Control, NHBC, Coal Authority etc.)
Heathrow Airport Expansion
A ‘first class’ approach to expanding one of the busiest airports in the world
Our Role
Our team was appointed to provide environmental assessment, permitting support for the project as well as landfill remediation and design. The Heathrow Expansion Programme is a £14bn project to construct a third runway and new taxiways linking it to the rest of the airport complex, a new terminal building and satellite, additional stand areas, newairport gateways, carparks and other associated infrastructure. It will involve re-routing the M25, diversion of rivers and substantial earthworks to achieve.
Solution
We provided advice on the remediation of three existing permitted landfill sites located along the line of the proposed new runway and to design and support the permit applications for four new landfills. The new runway is to be constructed on top of three pre-existing landfills posing complex remediation and foundational design issues. The existing leachate and landfill gas control systems needed to be replaced and a new capping system installed.
The four new landflls are being designed to EU/UK standards and need to take account of their close proximity to a working airfield with associated access restrictions. Our Waste team were subcontracted to Jacobs who were appointed as lead earthworks consultant for the project. Our role in this project was multi-disciplinary with our consultants providing a full range of services; earthworks design, site investigation support, hydrogeological risk assessments, stability risk assessments, air quality assessment, design of landfill gas, leachate and odour control systems, environmental monitoring, regulatory compliance and advice on landfill tax.solve outside of the technical parameters.
Location: Heathrow, UK
Client: Jacobs Engineering
Capital Value: £15bn
Ayesa Engineering
/ Waste Management
/ Waste Facility Permitting & Licensing
Brockholes Quarry, Preston
Waste recovery activity in a highly sensitive habitat
Overview
The site operator, Hargreaves North West, engaged Ayesa Engineering to assist with planning and permit applications for the restoration of their 24-hectare quarry in Lancashire. Historically, the quarry was utilized for extracting sand and gravel for the construction industry and is situated within a sensitive groundwater and surface water zone.
The restoration scheme requires approximately 246,000 cubic metres of suitable materials to be imported and placed on-site. Once completed, the reclaimed area will be transformed into a vibrant wet grassland habitat featuring emergent species margins. Additionally, the site will include lakeside fishing lodges, complete with access tracks and parking facilities, enhancing its appeal for recreational use.
Innovation / Value Add
Successfully launching a project is crucial, and our teams excel at bridging gaps among stakeholders. At the outset, we engaged in discussions with the client, local planning authorities, and environmental regulators to define the scope of the application. Our team designed and installed the monitoring boreholes essential for conducting flood risk and hydrogeological assessments, which also contribute to the surface water management plan.
Once Planning Permission and the S106 agreement were secured, we developed a comprehensive Waste Recovery Plan that included environmental site setting and design assessments, an environmental risk assessment, hydrogeological and hydrological risk assessments, and an environmental management system. This application received successful approval from the Environmental Agency.
As operations progress, Ayesa Engineering will continue to monitor ground gas, groundwater, and surface water to evaluate impacts on the sensitive environment, water resources, and ecosystems. This ongoing monitoring is critical, as it lays the foundation for future site closure and permit surrender. Additionally, we will assess waste materials on behalf of the client to ensure their suitability for site restoration.Our involvement will extend through the restoration and closure phases, providing our client with expert guidance to expedite completion and supplying the necessary information to authorities for compliance throughout the entire project lifecycle.
Location: Preston, Lancashire, UK
Client: Hargreaves North West
Capital Value: Undisclosed
Edwin Richards Quarry Restoration & Infill
Permit variation secured for Edwin Richards quarry
Overview
Edwin Richards Quarry, a former hard rock quarry over 80 metres deep, is situated in an urbanised area west of Birmingham in the Midlands, UK. The site had been partially infilled with municipal waste but was mothballed after a decline in waste inputs due to increased recycling efforts and rising landfill taxes. With over 5 million cubic metres of void space remaining, the unrestored quarry posed ongoing stability and safety hazards.
The site is operated by a multinational utilities company, one of the largest waste management firms in the UK. The Ayesa Engineering team provided expert guidance on re-permitting the site for restoration, leveraging a specific range of nonhazardous wastes. Our efforts helped the company optimise the remaining airspace and unlock the broader development potential of the site.
Our Role
Ayesa Engineering partnered closely with the client’s estates team to develop a strategic master plan for the entire site, assist with their planning application, and prepare the permit variation application for the Environment Agency. Our successful acquisition of the permit variation facilitated a highly efficient infilling methodology, resulting in significant savings in both construction costs and landfill taxes.
Innovation / Value Add
The permit variation application was complex, requiring the preparation of quantitative groundwater and geotechnical risk assessments, along with innovative waste acceptance protocols. Following this, we successfully secured a separate permit for a hazardous soil waste treatment facility on the site. Additionally, Ayesa Engineering has installed new environmental monitoring boreholes and continues to provide ongoing regulatory compliance advice.
Location: Birmingham, UK
Client: Waste Recycling UK
Capital Value: Undisclosed
Waste Facility Design
A Leader in Waste Facility Design
Activities carried out at waste facilities include disposal, treatment, recycling and energy generation. They are a crucial part of ensuring we sustainably manage the wastes produced by households, commerce and industry. These facilities are varied and include mechanical, thermal, chemical and biological treatment of wastes, soil remediation plants and landfill disposal. Materials that cannot be recovered or recycled, including the residues from treatment facilities, are disposed of in a landfill. Ayesa Engineering has extensive experience providing complete design services for waste facilities or providing specialist inputs to larger development consortiums.
Our team of multidisciplinary experts has delivered the design and master planning of nationally significant waste management projects in the UK and MENA region, including the 18 million cubic metre capacity, triple landfill Sohar Industrial Waste Handling and Treatment Facility (IWHTF) in Oman and at multiple, extensive scale waste management facilities over 20 years for the two leading waste management operators in the UK.
We can also design the remediation works at former waste management facilities, including treatment plants where soil and water contamination has occurred and historical landfill sites.
Landfill Facility Design Services
• Site selection support, site acquisition / due diligence
• Site investigations, materials testing and baseline environmental monitoring services
• Hydrogeological, stability and gas risk assessments
• Earthworks and geosynthetics design and specification
• Risk-based design of engineered containment lining systems including composite mineral / geosynthetic lining systems and associated leachate drainage & collection systems
Waste Treatment Facility Design Services
From scoping, to concept, to detailed design, ensuring a holistic and risk-based design approach to waste facilities
• Site selection, due diligence, site investigations and baseline environmental monitoring
• Design of hazardous waste treatment plants
• Design support to municipal/industrial waste materials recycling and thermal treatment plants
• Design of effluent treatment systems (biological or chemical)
• Design of facility infrastructure including master planning, layouts, roads, foundations, buildings & surface water management infrastructure
• Design and supervision of preliminary works, including site investigations, risk assessments, design of preparatory earthworks/site remediation, baseline environmental monitoring & Environmental Impact Assessments (EIA)
• Waste assessment and classification
• Waste recovery advice for permit applications
• Review of subsistence fee calculations
• Design of leachate, landfill gas and surface water management/treatment systems
• Design of environmental monitoring systems
• Preparation of operations and closure plans
• Design of remediation of old landfills for pollution control or redevelopment
• Design of low-level radioactive waste disposal facilities
• Project management (contract support, construction supervision, works verification, QA/QC, auditing)
Sohar Industrial Waste Treatment Facility (IWHTF), Kuwait
30-year masterplan for one of the largest waste facilities in the world Ayesa
Sohar IWTF (Industrial Waste Treatment Facility) Oman
Overview
Ayesa Engineering was appointed as the lead landfill design engineers responsible for developing and delivering the 30-year masterplan for the Sohar Industrial Waste Handling and Treatment Facility (IWHTF), one of the largest hazardous waste management facilities in the world. This state-ofthe-art treatment facility is designed to manage a variety of wastes, both hazardous and non-hazardous, and serves as a cornerstone of integrated waste management in Oman, catering to the needs of the entire country. Through the comprehensive masterplan, which spans three decades, Ayesa Engineering’s team outlined the most cost-effective, long-term strategies for future landfill development phases.
The project involved the construction of three landfills, providing 18 million cubic metres of void space within a 50-hectare complex. One of the landfill sites is designated for hazardous waste and features two composite liners, while the other two cells utilize single composite liners for non-hazardous and inert wastes. Ayesa Engineering provided detailed designs for the first cells of each landfill and supervised their construction.
Given the scale of the project, extensive earthworks and the design of a development platform involving over 400,000 cubic metres of soil were necessary, requiring meticulous design and geotechnical expertise. The hazardous waste cell features eight geosynthetic layers in the engineered containment lining system, which includes two sets of HDPE/GCL, drainage layers, and protective geotextiles.
Integrated Risk Based Approach
The scope of this Design & Build contract encompassed a comprehensive range of services, including tender support, site investigations, environmental monitoring, and hydrogeological studies. Ayesa Engineering was also responsible for facility master planning, earthworks design, landfill design, and geosynthetics design, along with surface water management design. Additionally, our team provided on-site construction support, including Construction Quality Assurance (CQA), and prepared the operations, environmental monitoring, and closure plans.
Location: Sohar, Oman
Client: Al Ahlia Environmental Services in contract to Be’ah
Capital Value: £20m
Scale: 50ha Complex | 400,000 m3
Earthworks
Izz Municipal Landfill
Masterplan design for a 20 year, 4.8 million m3 extension to the existing MSW landfill
Overview
Solid waste management is one of the top priorities of the Oman government and Be’ah was established by royal decree to manage and plan the solid waste strategy. As part of their strategy, aging dumpsites were closed and replaced with new large, regional, engineered containment landfills. The Izz Landfill facility services the Al Dakhiliya Governate, some 140km southwest of Muscat with Nizwa as its capital.
Our Role
From 2015-to 2019, Ayesa Engineering worked on behalf of Al Ahlia Environmental Services to provide a masterplan design for a 20 year, 4.8 million m3 extension to the existing MSW landfill and the detailed design for the first two phases of the project. Al Ahlia was contracted to construct these two phases to provide an initial 2 million m3 of sanitary landfill capacity, with associated infrastructure and two new leachate evaporation ponds (4000 m2). Our role included the supervision, quality assurance, and verification of the works and the preparation of the operational, monitoring, and closure plans.
Innovation / Value Add
We also provided the design and specification of the leachate collection, pumping, and treatment systems; the landfill gas management system, environmental monitoring systems and the surface water management plan. In addition, we undertook the design of the additional infrastructure required for both the construction and operational phases of the landfill including 2-way asphalt roads, roundabouts, access ramps, wheel wash, fencing, and storage areas.
Our experts prepared the technical specification and provided construction support to sign off all works to the highest standards. The engineering design included the preliminary / master plan which was pre-approved by Be’ah. This 20-year master plan included best practices for environmental monitoring and operations, as well as procedures and planning for the eventual closure. Throughout the process, our progress was presented to all stakeholders including Be’ah to ensure alignment and collaboration. The site was handed over progressively to the landfill operator as each phase was completed to ensure continuity of service to the local community.
Location: Izz, Oman
Client: Al Ahlia Environmental Services in contract to Be’ah
Capital Value: $8.6m
Construction Support
Sustainable Landfill Construction: Expert Support from Start to Finish
Ayesa Engineering staff have provided construction support on over 100 waste management development projects over two decades. Our team’s practical experience and design expertise allow us to deliver highquality solutions from initial scheme concepts to construction for clients. Our principal staff members have extensive experience in the field, providing a range of services, including site supervision, auditing, quality assurance, environmental monitoring and testing support.
We also provide ongoing construction services to our clients during the operation, restoration and aftercare phases. In some cases, we have provided continued support on waste management facility sites for over 20 years. Our project portfolio has sites located throughout the United Kingdom, the EU, Middle East and North Africa (MENA), West Africa, Central and Southern Asia.
Pre-Construction Services
• Site investigations
• Environmental monitoring
• Discharging pre-construction permit conditions
• Environmental Impact Assessment (EIA)
• Stability Risk Assessment (SRA)
• Hydrogeological Investigations and Risk Assessment (HRA)
• Earthworks design
• Geosynthetics design
• Infrastructure design (roads, buildings, lagoons, surface water drainage)
• Leachate and landfill gas system design
• Earthworks pad trials
Contract Procurement & Project Management Services
• Provision of tender and contract documentation
• Construction cost advice
• Cost-benefit analysis
• Management of the tender process and award of contract
• Construction project management
• Supervision of works / resident engineer
• Construction Quality Assurance (CQA)
• Cost and payment control during the construction stages
• Construction stage progress and programme management
• Verification reporting and regulatory approvals management
• Auditing waste facility construction works for quality and financial control purposes
Other Site Support Services
• Soil sampling and specification/management of geotechnical testing
• Environmental monitoring (Gas, groundwater, surface water, air quality)
• Audits of leachate and gas management systems
• Design of gas generation pumping trials
• Installation / retro-installation of leachate and landfill gas extraction and treatment systems
• Leachate pumping trials
• Design and construction support for wetland treatment systems for leachate
• Expert investigation of slope failures
• Health & Safety support
• Supervision of waste facility pollution clean-up and remediation works
• Topographical surveying
Jameson Road Landfill
20 Years of project management, design and supervision at Jameson Road Landfill
Overview
The Jameson Road facility is a prominent regional landfill in Lancashire, UK, accepting a diverse range of municipal solid waste (MSW), industrial, and commercial wastes. Originally operated by the local council, it is now owned and managed by the multinational utility company SUEZ. For the past 20 years, the Ayesa Engineering UK team has provided comprehensive multidisciplinary construction support, master planning, design, and permitting advice for SUEZ at this site.
The facility required extensive remedial works to meet modern standards, including the design and installation of over 40 hectares of capping and the construction of a significant engineered separation bund to isolate the older sections of the site. Over the course of two decades, the remaining area has been progressively developed with new engineered containment cells constructed to comply with EU Landfill and Groundwater Directives. In addition, advanced landfill gas and leachate management systems have been implemented to ensure environmental protection and regulatory compliance.
Our Role
Ayesa Engineering initially project-managed the remediation of the former council-operated section of the site, overseeing the translocation of 800,000m3 of waste, the construction of a 1-kilometre-long engineered separation bund, and the installation of 40 hectares of geosynthetic capping.
For over two decades, Ayesa Engineering has consistently designed, supervised, and verified the construction of multiple new landfill cells and associated capping works as landfilling has progressed across the remaining 60 hectares of the site. The landfill features a composite mineral clay/HDPE liner and is capped with an LLDPE geomembrane. For each new cell construction and post-infill capping contract, Ayesa Engineering has assisted the operator in procuring the contract and supervising the works. This process begins with detailed design, securing approval from the regulator (UK Environment Agency), preparing the contract specifications, and issuing the tender pack to contractors.
Location: Fleetwood, UK
Client: SITA Suez UK
Capital Value: £25m+
Ayesa Engineering then supports the client throughout the tender evaluation process, contractor appointment, and contract management, providing on-site supervision during construction. Upon completion, we deliver the necessary Construction Quality Assurance (CQA) verification reports to the regulator.
Whinney Hill Landfill
Extensive remediation works to 45m deep hard rock quarry
Overview
The site is a 45-metre-deep hard rock quarry with over 15 million cubic metres of void space. Ayesa Engineering was responsible for designing and project-managing extensive remediation works for the older, former local authority landfill, which accepted municipal solid waste (MSW), industrial, and hazardous wastes. Additionally, Ayesa Engineering designed four new landfill cells.
The remediation efforts included the excavation and translocation of 300,000 cubic metres of waste, as well as the construction of a 40-metre-high engineered separation bund. A risk-based design approach was adopted in compliance with PPC/ EPR regulations and Environment Agency guidance. This comprehensive approach included quantitative assessments of hydrogeology, landfill gas, and stability risks.
Our Role
Ayesa Engineering has served as the lead engineering design consultant on this site for over 20 years, overseeing both Phase 1 remediation works and the Phase 2 development of multiple engineered containment cells. Our team has also provided comprehensive construction contract support, site supervision, and Construction Quality Assurance (CQA) validation for earthworks and containment liner installation.
In 2019, SUEZ commissioned Ayesa Engineering to upgrade the leachate treatment system, beginning with a thorough process design assessment.
To support these design efforts, Ayesa Engineering has conducted extensive hydrogeological and geotechnical investigations, Environmental Impact and Risk Assessments, and provided input for planning applications, along with robust support for Environmental Permitting processes.
Location: Accrington, UK
Client: SITA Suez UK
Capital Value: £30m+
Ayesa Engineering / Waste Management / Construction Support
Project Focus
Kuwait Contaminated Soil Repository
Comprehensive remediation of oil-contaminated soils
Overview
This project is part of a significant clean-up effort addressing oil-contaminated soils resulting from the 1991 Iraq War. During their retreat from Kuwait, the Iraqi army destroyed hundreds of oil wells, leading to the contamination of over 25 million cubic metres of soil. In response, the United Nations initiated a comprehensive clean-up programme that employed a combination of bioremediation, thermal treatment, and landfilling techniques.
Ayesa Engineering served as the lead design engineers for the construction of a one-million-tonne landfill repository, strategically located in the oilfields south of Kuwait City.
The contract was awarded by the Kuwait Oil Company under the Kuwait Environmental Remediation Programme (KERPS) scheme, structured as a design and build project.
Our Role
Ayesa Engineering provided comprehensive tender support to the Design & Build client, who successfully navigated intense international competition.
Their involvement included a wide range of services, such as site selection studies, design and supervision of borehole investigations, environmental monitoring, hydrogeological and geotechnical studies, earthworks and landfill engineering design, leachate management design, surface water management design, construction supervision, and Construction Quality Assurance (CQA). Additionally, Ayesa Engineering prepared operational, monitoring, and post-closure plans.
The project was carried out in two phases: the first phase focused on constructing the base of the repository, followed by infilling, capping, and restoring the site
Location: South East Kuwait
Client: NBTC
Capital Value: £14m
Training Courses
Ayesa Engineering can provide a wide range of training courses relating to waste management, environmental assessment, geotechnics and sustainability.
Many of the technical courses are endorsed by the Geological Society and count towards CPD. We are contracted to the UK Environment Agency to provide their staff with training in Advanced Landfill Engineering. Our training courses are usually run as interactive workshops but other learning styles can be accommodated as required.
Training courses provided:
• Soil and Rock Descriptions to BS5930 (1 day workshops).
• Sustainability awareness.
• Sustainable procurement in construction.
• Stakeholder workshops.
• Waste classification and coding.
• Slope stability to EC7.
• Advanced Landfill Engineering.
• Landfill stability risk assessment.
• Earthworks design and supervision.
• Use of geosynthetics in design.
• Installation of Geosynthetics.
