Land Remediation

Completion of an appropriate site investigation will enable the formulation of a robust Conceptual Site Model, which considers plausible pollutant linkages. Where plausible pathways between actual contaminant sources and potential receptors are identified, remediation will be required, either treatment/removal of the source, or “breakage” of the pathway.

In addition, Lithos also consider the need for ground improvement, and\or the earthworks necessary to create a platform on which development can commence.

Choice of the most appropriate remediation option(s) is influenced by:

(a) The Conceptual Ground Model, including:

  • geology, hydrogeology, proximity to watercourses etc;
  • volume and distribution of soil requiring remediation;
  • nature (eg gravely or clayey) of soil requiring remediation;
  • nature of the contaminants – the “mixture”, mobility, volatility, and resistance to degradation.

(b) Classification of the soil for the purposes of disposal to landfill:

  • site’s size – area available for remediation activities;
  • site’s location – consideration of odour, dust and noise associated with remediation activities;
  • redevelopment proposals;
  • estimated costs and timescale associated with the proposed remediation technique;
  • degree of confidence/certainty in proposed remediation technique;
  • views of the Local Authority.

Remediation options for contaminated soils include:

  • isolation beneath cover;
  • ex-situ bioremediation;
  • soil washing;
  • solidification or stabilisation;
  • recovery of coarse fraction;
  • soil vapour extraction;
  • excavation & disposal.

And for contaminated groundwaters include:

  • pump & treat;
  • chemical oxidation;
  • Dual-Phase Vacuum Extraction (DVE);
  • bioremediation;
  • attenuation monitoring.

Remediation Design & Remediation Strategies

Materials Management Plans

Supervision & Verification of Land Remediation