Land contamination assessment is a sequential
process of gathering and assessing successively more detailed data about the
contamination regime at a site with the aim of excluding low risk sites from
further consideration at the earliest practical point in the assessment process.
Desk Top Studies
(Preliminary Risk Assessment): A Desk Top Study is typically the first
tier of geo-environmental assessment for our clients and provides an initial
understanding and assessment of the potential risk associated with a site. This
understanding is know as a Conceptual Site Model and is used to design the scope
of the subsequent investigation stage.
Site Investigationis used to physically investigate the potential risks identified by the Desk Top Study.
Generic Quantitative Risk Assessmentsuses the data gathered from the Site Investigation to refine the land contamination risks associated with a site by using Generic Assessment Criteria.
Assessmentsinvolve monitoring of ground gas in wells installed
during Site Investigations with specialist equipment and assessing the results
against criteria within published best practice guidance.
Detailed Quantitative Risk Assessmentsinvolve a more detailed assessment of the data gathered from the Site Investigation and the Generic Quantitative Risk Assessment to further refine the land contamination risks associated with a site by generating and using Site Specific Assessment Criteria.
Remediation Options Appraisals: If land contamination risks are assessed by the Generic and/or Detailed Quantitative Risk Assessment to be unacceptable, remediation of the site is proposed and potential remediation options are assessed to determine the most appropriate option or combination of options.
Remediation Strategies: Following the selection of an appropriate remedial option or options, a strategy is produced outlining how the option(s) is to be implemented in relation to the site with appropriate remediation and validation criteria.
Remediation Validation: Following the implementation of the remediation strategy by a competent contractor, usually engaged directly by the client with consideration of our advice, we undertake verification that the remediation strategy has been implemented as designed and provide a record of this verification for our client’s records and frequently to meet regulatory requirements.
Ground Conditions Chapters for Environmental Statements: These chapters form part of Environmental Impact Assessments and incorporate summaries of ground condition assessments under taken for sites with an assessment of the implications proposed developments on ground conditions.