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Phase 2 Intrusive Contaminated Land Site Investigation
Environmental Planning Services
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Are you looking for a Contaminated Land Investigation?
Phase 2 Intrusive Contaminated Land Site Investigations typically follow a Phase 1 Desktop Study and Preliminary Risk Assessment.
The idea of the on-site investigation is to provide quantitative analysis to the generic risk assessment by means of thorough soil sampling and logging.
A Phase 2 is also known as a Land Contamination Risk Management (LCRM) Options Appraisal. Well, especially if you are hoping to be granted planning permission. Local Authorities, Building Control and, Environment Agency need records of all of these things to see if a site is suitable or not.
Learn more about our services below.
Contaminated Land Risk Assessment and On-site Surveys
Contaminated land site investigations are often required in order to establish the properties and contamination characteristics (soil, groundwater and land gas) of a site.
All contaminated land site investigations are designed by our engineers to meet the objectives of BS 10175 “Code of Practice for the Investigation of Potentially Contaminated Sites”, as well as the technical approach presented in Contaminated Land Report 11 “Model Procedures for the Management of Land Contamination” (Environment Agency) for applying a risk management process when dealing with land affected by contamination.
A tiered approach is adopted for assessment of the associated risks from contaminated land to find information and properties of identified contaminants, transport, exposure pathways and receptors that could be harmed.
Ground Investigation and Laboratory Testing
Where plausible possible risks are identified, this preliminary risk assessment forms the basis for the design of further contaminated land investigation to support the next level of risk assessment – generic quantitative risk assessment (GQRA). Usually, ground investigation and laboratory testing is required to provide sufficient data to characterise the site, and to assess relevant pollutant or contaminant linkages.
The contaminated land risk assessment is based on generic criteria. If identified pollutant linkages cannot be adequately assessed using generic criteria, or no such criteria are available that are appropriate for the site conditions, then it may be appropriate or necessary to proceed to detailed quantitative risk assessment (DQRA). Such an assessment is based on site-specific information on the properties and behaviour of identified contaminants, transport, exposure pathways and receptors that could be harmed.
We have a wide range of experience of contaminated land ground investigation and risk assessment for a variety of purposes in many different contexts, covering soil, gas and groundwater contamination: from simple assessments for landscaping cover, to complex multi-contaminant, multi receptor assessments for re-development on heavily contaminated brownfield sites, to groundwater risk assessments for environmental permitting applications.
Intrusive Site Investigation Methods
A Phase 2 Intrusive Investigation might encompass the following activities:
Excavation of trial pits or drilling of boreholes, with a comprehensive material analysis from the boreholes, along with sample testing.
Subsequent sample analysis to identify specific substances or materials outlined in the Phase I Desktop study.
Implementation of gas monitoring if the Phase I study deems it necessary.
Thorough assessment of data collected during the site investigation, sampling, and measurements to identify contamination and assess potential risks associated with the development.
Compilation of a comprehensive report summarizing the study’s methods, findings, and, if required, recommendations for appropriate remediation measures.
Methods used include:
– Hand Dug Trial Pits
– Mechanically Excavated Trial Pits
– Windowless Sampling
– Shell and Auger Drilling
– TRL/ Dynamic Probing
– SPTs
– Monitoring Well/ Borehole Installations