Groundwater Specialists

Oxford Geotechnica International

Services/Info

Groundwater Management Review

   

Introduction

    

The major advantages of technical reviews are to minimise the cost of the groundwater operations and to ensure that the risks from dewatering or the installation of dewatering equipment are known.

  • To identify the risks associated with the existing groundwater problem.
  • To design a solution to overcome the identified risk from groundwater.
     

Groundwater

    
Independent Groundwater Review Service which provides:  
  • Interpretation of the geological conditions, and the impact that the underlying geology will have on the success of the dewatering operations.
  • Assessment of the most effective method of installation, the wellpoint design, pump and pipe work selection and the method of water discharge.
  • Risk assessment of the dewatering operation and the effect it will have on ground settlement, the movement of groundwater, groundwater pollutants and critical construction site issues.
  • Review of how dewatering or groundwater control would improve the effectiveness of construction processes or material handling operations

Environmental

    
Determining a true picture of the lay of the land requires an analytical look at several ground conditions including topography, existing groundwater situation, collection of water samples and monitoring in the field. The data is then assessed or computer modelled by the OGI technical team, which includes Hydrogeologists, Geotechnical Engineers, Environmental Engineers and Geologists all of whom are experienced and qualified to at least MSc level.
Soil characteristics, groundwater situation and groundwater chemistry can be determined from a combination of investigation and monitoring in the field, along with the collection of water samples to assess the degree of contamination.
     

Risk Assessment Review Service

    
The data for the groundwater risk assessment is accumulated from the following sources. Once the assessment is completed a suitable solution for the remediation of the groundwater problem is designed based on the risk assessment.

1) Desktop study of maps and plans of the local topography, historical maps and geological plans.
These factors are used to assess the likely conditions to be encountered during an investigation or construction process and hence give an indication of the risks without having to visit the site or area to be assessed.
2) Site reconnaissance or walk over
This will confirm or add extra information to the desktop investigation.
3) Ground investigation report
Provides information on the geology and groundwater situation, as well as to sample and record the groundwater quality.
4) Groundwater monitoring and sampling report.
Provides detailed information on degree of groundwater contamination and groundwater levels.
     
From the risk assessment data, the degree of risk can be assessed, whether it is from one of the following, or a combination of more than one.
(a) Flooding
(b) Soft ground
(c) Ground collapse
(d) Ground movement
(e) Contaminated groundwater
(f) Contamination of groundwater
(g) Migration of contaminated groundwater
  
Once the assessment is completed a suitable solution for the remediation of the groundwater problem is designed based on the risk assessment.
     

Consultancy Services

    
OGI is a 16-year-old company that understands the challenges and frustrations you face. We provide a common sense approach and viable solutions that bring cost-effective options to every job.
A number of our senior geotechnical staff have experience acting as Expert Witnesses, giving evidence at arbitration and litigation hearings, at Planning Enquiries and at Parliamentary Committees.
     
     

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© OGI Groundwater Specialists Ltd 2007