Secondary and Tertiary Containment Design for New Build Tanks

IKM News • Nov 2017

Secondary and Tertiary Containment

IKM are delighted to have been appointed to provide further multi-disciplinary services to one of Europe’s leading independent crude oil refiners, for the construction of two new diesel tanks at an existing fuel storage terminal in north-west England. The additional works will include the design of the civil/structural items associated with the new tank infrastructure, drainage and access.

IKM have initially supported our client through the project planning process by:

  • Submitting successful planning applications
  • Undertaking a fully costed options appraisal to identify a suitable bund configuration, bund lining and drainage system;
  • Undertaking a geo-environmental desk study to inform the site investigation requirements
  • Undertaking a topographical survey

We then delivered the detailed design of the secondary containment structures which included the following:

  •  Intrusive geo-environmental site investigation to determine ground conditions, anticipated settlement and waste classification;
  • Design of reinforced concrete raft foundations with an integral leak detection system
  • Design of the closed internal bund drainage system
  • Design of a reinforced concrete secondary containment system in accordance with industry good practice guidance (CIRIA 736 & PSLG) to the requirements of the COMAH regulations
  • As part of this work, IKM has identified that the site of the new build tanks is constrained by existing adjacent plant and the site boundary. IKM have carried out a risk assessment to identify significant hazards and potential mitigation measures.

This has led to us being appointed to progress a study to determine the requirement for additional tertiary containment outside the new bund. This will include computational fluid dynamic analysis to calculate overtopping volumes for a number of catastrophic tank failure scenarios. This will determine overland flow models, to allow potential improvements to be detailed ensuring the environmental and safety integrity of future site operations.use.

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