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Geo-Environmental

  • Renthal, Corrie Way, Bredbury Industrial Estate

Geo-Environmental Investigation

Experienced engineers at Atkinson Peck are regularly commissioned to produce cost effective geo-environmental appraisals to investigate both the geotechnical and contaminated land aspects of a proposed development site. Often the land is already in our client’s ownership however such investigations can also facilitate prospective land acquisition or sale.

Typically the investigation follows a phased approach, with the objective being to discharge planning conditions in respect of potentially contaminated land and to provide sufficient information to allow foundation, highways and drainage design too proceed. A typical phased approach is detailed below:-

• Phase I Report (Desktop Study) – A Desktop Study report is produced by the engineer using information collated from a number of sources including, environmental databases’, geological mapping, the Coal authority and a site walkover etc. At this stage a conceptual model is produced to assess the magnitude of risk from each identified contaminant, looking in each instance at the source, pathway and receptor. Prior to the Phase II investigations taking place, it is usual practise to first provide the Local Authority Environmental department with a copy of the Phase I Report and obtain written approval for the intrusive investigation and contamination testing proposed.

• Phase II Report (Site Investigation) - Utilising the services of local site investigation contractors with whom we have a long standing relationship, we can arrange and coordinate intrusive investigations to include as required, trial pitting, boreholes, in-situ testing, installation of monitoring wells, recovery of soil samples and scheduling of geotechnical analysis or chemical testing on the samples recovered. A site investigation report can then be prepared to include the factual information obtained during the investigation and interpretive reporting to include proposals for substructure design and remediation if necessary.

• Remediation Strategy & Validation Proposals – A separate remediation strategy document is often produced, the purpose of which is to clearly inform the developer of the remediation strategy agreed with the Local Authority Contamination department and to identify the information required from the contractor for incorporation in the validation report.

• Validation Report - Completion of a validation report to provide verification that the remediation has been carried out in accordance with the agreed strategy, including appropriate records provided from site (ie photographs, waste transfer slips, testing results for any imported material) and additional chemical analysis testing as required.

If a proposed development site lies inside the Coal Authority’s newly defined ‘Coal Mining Development Referral Area’, the National Planning Policy requires production of a Coal Mining Risk Assessment to demonstrate to the Local Planning Authority that the application site is currently safe and stable, or can be made such.

If a report is required, Atkinson Peck would be pleased to provide a competitive quotation, using as a basis for the report the model template suggested by The Coal Authority. The report is compiled using an up-to-date Coal Mining report, geological plans, historic mapping, historic borehole logs and pertinent records from previous desk-based assessments and past intrusive site investigation works.

Using the information obtained from a desk based assessment a site specific risk assessment can be completed which enables a mitigation strategy to be proposed to ensure safety and stability of the development or occasionally dictates further intrusive investigation works required.