Site Decommissioning Services
CSG provides commercial and industrial site decommissioning services across the UK, bringing together industrial cleaning, waste management and tank decommissioning within an agreed project scope.
Whether you are closing a facility, removing redundant tanks, managing legacy waste or preparing for redevelopment, our team coordinates the services required for your project. Supported by specialist vehicles, experienced personnel and waste treatment facilities, we plan the work around your site requirements, programme and agreed responsibilities.
We deliver fully managed site decommissioning programmes combining waste management, industrial cleaning and specialist decommissioning services.
90+
Years
supporting industrial facilities and critical infrastructure
How Does Our Site Decommissioning Service Work?
Tell us about the site, assets, known materials and your reasons for decommissioning. We review the available information and agree any site surveys, waste assessment or sampling needed to define the work.
We then confirm the project scope, responsibilities, access requirements, safety arrangements and programme, including any phased works or shutdown windows.
Our team coordinates the agreed cleaning, waste management and decommissioning activities, provides progress updates and supplies the applicable waste records and completion documentation.
Project Scoping
Supporting identification, assessment and planning of assets and waste streams ahead of decommissioning
Industrial Cleaning
Including tank cleaning, sludge removal, pipework flushing and jetting
Waste & Tank Removal
We’ll manage all waste streams following the waste hierarchy, and support tank and infrastructure removal
Project Management
Get full visibility with dedicated project management, progress reporting and completion documentation
What You Can Expect From Our Site Decommissioning Service
Site decommissioning often involves multiple disciplines, contractors and regulatory requirements. But with CSG, our project team coordinates the agreed services, specialist resources and reporting through a single point of contact.
- Support for planned closures, redevelopment and operational change
- Project-specific risk assessments and method statements (RAMS), with applicable compliance documentation
- Chemist support available where required for classifying waste streams safely
OUR CREDENTIALS
Built On Recognised Standards
Quality, environmental, and safety credentials supporting our site decommissioning, industrial cleaning and waste management services.
DNV-Certified
Quality, Environmental & Health and Safety
SAFE Contractor
SSIP Accredited
Achilles UVDB
Category B2 Assessment
CHAS
Accredited
JOSCAR
Registered Supplier
CIWM
Affiliated Member
Who We Support
Our site decommissioning services support organisations across a wide range of sectors, including:
Manufacturing & Industrial
Plant closures, operational changes, asset removal and redevelopment
Utilities & Infrastructure
Decommissioning activities involving tanks, process systems and waste infrastructure
Fuel & Energy
Cleaning, waste removal and decommissioning for fuel storage facilities and depots
Multi-Site Organisations
Coordinated decommissioning programmes across wider property portfolios
We’ll help you define the scope and plan suitable decommissioning and waste management arrangements. Speak with our team
Complex Site Decommissioning, Coordinated From Start to Finish
Large-scale site closures require careful planning, specialist teams and clear oversight. CSG brings waste removal, industrial cleaning, tank decommissioning and project management together within one coordinated programme.
At Portals International’s 16-acre site, CSG delivered a six-month decommissioning programme and removed more than 2,100 tonnes of waste. Work included cleaning and decommissioning 16 chemical storage tanks and an effluent treatment plant containing more than 1,600 tonnes of non-hazardous effluent.
- Multiple specialist services coordinated by one project team
- Chemist-led hazardous and laboratory waste management
- Storage tank and effluent treatment plant decommissioning
- Regular progress updates and detailed waste reporting
The case study records hazardous waste removal without environmental contamination, supported by weekly progress updates and monthly waste reporting.
Related Blogs & Guides
Frequently Asked Questions About Site Decommissioning
What is site decommissioning?
Site decommissioning is the process of safely closing, clearing, cleaning, removing or making redundant operational assets, infrastructure and waste materials as part of a site closure, redevelopment project or operational change.
What services are commonly included?
Every project is different, but site decommissioning programmes can include a combination of commercial waste services including:
- Industrial cleaning
- Tank cleaning
- Tank decommissioning
- Gas-free certification
- Hazardous waste collection and disposal
- Bulk liquid waste removal
- High-volume tankering
- Sludge removal
- Pipework flushing
- Drain and sewer jetting
- Forecourt cleaning
- Effluent treatment plant decommissioning
- Tank removal (scope dependent)
- Waste packaging and labelling support
- Site clearance and waste segregation
Can CSG manage site decommissioning end-to-end?
We can coordinate the agreed decommissioning programme through a single point of contact, bringing together cleaning, waste management, tank decommissioning and associated specialist activities.
The services included, project responsibilities and any separately arranged works are confirmed during scoping before the programme begins.
Do you handle hazardous waste as part of decommissioning?
Yes. We assess hazardous waste streams and confirm suitable handling, collection and treatment arrangements before removal.
Specialist chemist support can assist with identification, classification, packaging and labelling where required. Acceptance and the appropriate management route depend on the waste’s composition and condition.
Do you decommission tanks as part of site closures?
Yes. This is a common part of many decommissioning projects we manage. We can include cleaning, gas-free certification, waste removal and tank removal where required and within scope.
Can you decommission effluent treatment plant assets and manage high volumes?
We can support the decommissioning of effluent treatment plant assets and associated infrastructure, including high-volume liquid waste removal and tankering services where required.
How do you manage safety and compliance during a site decommissioning project?
Safety is central to every site closure project. To manage this, we develop project-specific RAMS, method statements and operational controls, backed by trained personnel, technical expertise and clear compliance processes throughout delivery.
Is site decommissioning only for full site closures?
Not necessarily. This service can also be used for operational changes, asset replacement and redevelopments.
How long does a site decommissioning project typically take?
Project duration is highly dependent on the scale and complexity of the site. Some projects may be completed within a week, whereas others can run over several weeks or months. Once we’ve scoped the project requirements, we’ll be able to give you a more accurate timeframe for completion.
Can you work to tight deadlines or shutdown windows?
We’ve got lots of experience working towards planned shutdowns and time-sensitive schedules. Let us know as far in advance as possible so we can plan around your deadlines.
Will we receive consolidated reporting, waste summaries and completion documentation?
Yes. We can provide consolidated reporting covering waste volumes, routing information, project progress and completion documentation to support compliance and audit requirements.
Can CSG manage decommissioning in environmentally sensitive locations?
Yes. We assess the site, surrounding environment, waste streams and operational risks before developing the decommissioning programme. Appropriate controls, documentation and specialist resources are then coordinated throughout the project. At Portals International decommissioning site near the River Test, the case study records 2,100 tonnes of hazardous waste removal without environmental contamination.
Does site decommissioning include demolition and land remediation?
The scope depends on the project. Tank and associated infrastructure removal may be included where agreed, but wider building demolition or land remediation should not be assumed to form part of the service.
We confirm the activities included in the decommissioning programme and identify any additional specialist requirements during project scoping.
What information do you need to assess a decommissioning project?
Please provide the site location, reason for decommissioning, target dates and details of the tanks, plant or infrastructure involved.
Existing drawings, asset lists, waste inventories, safety data sheets and previous survey results can help define the scope. Tell us about access restrictions, ongoing operations and known hazards. We can advise what further assessment is needed if information is incomplete.
Get a Free Waste Management Audit
The easiest way to start improving your waste management is with a Free Waste Management Audit from CSG. Our team will assess your current waste streams, identify opportunities to reduce costs and make practical recommendations to improve how you manage your waste.
Safety Built Into Every Service
See how CSG protects people, sites and the environment
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Discuss Your Site Decommissioning Project
Tell us about your site, the assets involved and your proposed timescale. Whether you are exploring options, preparing a tender or planning a closure, our team can help define the cleaning, waste management and decommissioning scope. Include any known materials, ongoing operations or site restrictions so we can discuss suitable next steps.
To discuss your project by phone, call 0800 011 6600.