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Services

Contaminated Land & Remediation

Over 30 years of experience in the field

With over 30 years experience of contaminated land investigation, characterisation and remediation in the UK and overseas, RPS fully understands the technical and commercial issues involved.

For planning & development, due diligence, environmental permitting or the result of a particular incident, RPS' contaminated land expertise ranges from small relatively simple site investigations to multidisciplinary assessments of complex industrial sites requiring various different remediation techniques. We excel in providing our clients with advice to manage environmental liabilities at a site whilst ensuring regulatory and other stakeholder acceptance of the strategy.

RPS provides technically robust and commercially focused advice to our clients and we are very experienced with working with clients with very challenging programme requirements. Where appropriate we also provide our clients with ground engineering advise which is often best integrated with managing contaminated land during site development.

Our services include:

Desk Studies and Site Walkovers (Preliminary Risk Assessments)

Intrusive and Non Intrusive Site Investigations

Quantitative Human Health Risk Assessments

Groundwater Contaminant Fate and Transport Modeling

Landfill Gas and Soil Vapour Surveys and Assessments

Geotechnical Investigations and Appraisals

Abnormal Cost Assessments

Radioactivity Surveys

Remediation Option Appraisals and Design

Remediation Specification and Contract Procurement and Management

Remediation Supervision and Verification

GIS and Environmental Data Management

2D and 3D Ground Modeling and Visualisation

Site Waste Management Plans

Material Management Plans

Hazardous Waste Classification

Case Studies

Glevum Court

Glevum Court, Gloucester

Barratt Homes

RPS provided and coordinated technical support for the initial planning application and subsequent discharge of planning conditions for a residential development in Gloucestershire.

RPS undertook a range of services to support redevelopment of a former works site used for various activities including metal fabrication, assembly, turning, paint spraying, degreasing and material storage. In addition the road frontage has served as a petrol filling station. These activities have lead to the contamination of the site with a range of solvents including TCE and DCE. The services included:

Desk top Study and Preliminary Risk Assessment

Geo-environmental ground investigation

Specialist carbon dating and odorant gas analysis

Detailed human health, controlled waters and gas risk assessment

Remedial design and implementation

Remedial Validation.


Due to the identified contaminants, particularly the presence of a range of solvents, the regulators applied a high level of scrutiny to the assessments and subsequent remediation works undertaken at the site. The assessments were required to establish the risk to future site users and adjacent offsite human health receptors that had the potential to be impacted by inhalation of volatiles form contaminated groundwater that may have migrated from the site.

RPS provided a suite of assessments that underpinned the cost effective redevelopment of the site.

Nuclear Licensed Site

Former Site Tip Remediation and Investigation

Nuclear Licensed Site

RPS was appointed for the site investigation and subsequent remediation of a former site tip at a nuclear licensed defence site which was previously a World War II Royal Ordnance Factory. The site investigation and risk assessment confirmed soils within the tip to be impacted with asbestos, chemical contaminants and explosive residues.

As part of the redevelopment proposals, RPS developed the remediation strategy for mitigating contamination risks and prepared a detailed Engineering Design and Remediation Specification. The engineering design included 3D digital terrain modelling, volumetric calculations, CAD engineering drawings and visualisations.

The remediation strategy comprised the excavation and re-profiling of the asbestos contaminated tip material, and the placement of protective engineered capping materials to create a sculptured landscape feature.

To maximise the re-use of materials on site, the remediation strategy also included the adoption of current environmental best practice CL:AIRE 'Definition of Waste: Development Industry Code of Practice' (CoP) which promotes the most sustainable reuse of site derived materials and the use of a Materials Management Plan (MMP).

The remediation was supervised by Remediation Consultants, Radiation Protection supervisors and Explosive Ordnance Detection engineers from RPS. We also undertook a programme of groundwater monitoring and a Verification Report was also prepared to demonstrate compliance with the strategy and the MMP.

The sustainable remediation strategy design allowed 99% of the excavated materials being re-used within the development.

Project Heartlands

Project Heartlands, Merthyr Tydfil

Welsh Government, Merthyr Tydfil Council

RPS was appointed by the Welsh Assembly Government (WAG) and Merthyr Tydfil Council to support Alder King in the marketing of a site in Merthyr Tydfil.

RPS has undertaken ground and groundwater assessments developing a cost effective approach to development constraints management enabling a financially none viable site to be brought back to the market.

RPS undertook a reappraisal of the available information from the previous eight site investigations and assessments. The appraisal included a gap analyses and development of a detailed conceptual model maximizing the value of the available information. Detailed constraints plans were produced to support development of a cost effective programme for development marrying the client and developer objectives for scheme certainty and cash flow.

Reappraisal of the assessments, detailed HRA, and dialogue with the regulator enabled RPS to agree an alternative approach for remediation allowing the contamination remedial approach to focus on protection of human health supporting cost effective redevelopment of the site.

Reuse criteria have been derived based on the likely range of end uses (houses, POS, hardstanding etc) supporting sustainable use of materials across the site and minimising import / export. Contractor meeting were held to ascertain fixed cost site preparation works.

On the basis of the above assessments and appraisals the anticipated remedial reclamation costs (including foundation abnormals) were rationalised by up to 50% enabling a positive scheme value to be achieved.