Project Description

Petrochemical Brownfield Remediation, UK

Project Details

CLIENT:  CONFIDENTIAL

petrochemical brownfield remediation
petrochemical brownfield remediation

The Challenge

IKM was appointed to assist our Client with discharge contaminated land conditions associated with their planning application to replace an industrial steam and power plant with a new, modern facility and associated control room.

The development site had been occupied by a plastics manufacturing unit, which had been demolished some 15 years earlier. This process plant used a number of liquid feedstocks which presented potential risks to the new development. IKM was requested to investigate and quantify these risks to inform any potential remedial actions.

As the first stage in assessing risks, IKM recommended that a Phase 1 desk study (preliminary risk assessment) and site visit be undertaken to understand the layout of the former manufacturing site, the ground conditions, and the constraints associated with undertaking future intrusive ground investigation works.

The Solution

The Phase 1 desk study identified potential risks, primarily due to limited historical data on the site. This culminated in a Phase 2, intrusive investigation, followed by a period of soil gas and vapour, groundwater monitoring, and quantitative risk assessment.

IKM prepared the ground investigation specification on behalf of our client and then acted as Investigation Supervisor for the duration of the site works. This included reviewing exploratory hole logs, scheduling all laboratory testing and designing the monitoring wells.

The GI contractor provided a factual report which IKM used to prepare a Phase 2 contaminated land assessment. This included assessment of risk to human health (from soil, groundwater, NAPL, vapour, and ground gas) and the water environment. This was submitted to the Regulator for review. Where necessary, IKM provided support and liaison with SEPA to finalise the report for approval.

IKM also provided advice to the client project team and prepared reuse criteria for the civils contractor to use to determine the suitability of soil for reuse.

From the outset, IKM considered the conditions at the site and developed a pragmatic approach to the contaminated land assessment process, ensuring that the Client was engaged and included at each stage in the process. IKM attended regular progress meetings as part of the project team which helped keep the project on track and allowed sharing of knowledge amongst the wider team.

The scope of each Stage was informed by the findings of the previous Stages. This measured approach not only offered best value to our Client but also permitted collaboration, taking cognizance at all stages of the sensitive nature of the site.

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