borehole remediation Articles

  • Modelling to assist risk assessment and remedial strategy development for a petrol spill

    Client: Confidential: Petroleum Retailer Location: Luton, UK Services: Groundwater modelling, contaminant transport modelling, remediation strategy development Summary: Groundwater modelling demonstrated that hydraulic containment of a contaminant plume could effectively protect a public water supply in the medium term, ...

  • Due diligence and remedial cost estimation at a former car manufacturer

    Client: Confidential Location: Coventry, West Midlands, UK Services: Due Diligence, Remedial Cost Estimation Summary: ESI’s review and remedial cost estimation provided our client with reliable information on which to base decisions to sell on, or redevelop, a former car manufacturing site ESI was ...

  • Emergency response and remediation of a petrol leak: petrol filling station

    Project: Emergency Fuel Leak at an Operational Petrol Station Client: Franchised petrol station operator Services: Emergency response/leak management, regulator negotiation, site investigation, remediation and verification Summary: Responsive, pragmatic advice and robust regulator negotiations aided rapid characterisation ...

  • Remediation of chlorinated ethenes, ethanes, and methanes in groundwater using carbon- and iron-based electron donor

    Field-scale pilot tests were performed to evaluate enhanced reductive dechlorination (ERD) of dissolved chlorinated solvents at a former manufacturing facility located in western North Carolina (the site). Results of the site assessment indicated the presence of two separate chlorinated solvent–contaminated groundwater plumes, located in the northern and southern portions of the site. The ...


  • Groundwater monitoring and assessment with ESdat environmental data management software and its use in groundwater remediation plans

    Groundwater investigations, contaminated/industrial sites, landfill and regulatory compliance are all ideal areas for environmental consultants and site managers, specializing in groundwater monitoring and assessment, to use environmental data management software. A successful groundwater ...

  • IEG multi level sampling well (MLSW) case study - IEG Technologie GmbH

    The MLSW-system is used for the recovery of multiple high-quality samples of soil-gas and groundwater from numerous isolated horizons in a single standard borehole. The system is also used to accurately delineate contamination profiles in three dimensions, which is vital or the design, installation and monitoring of remediation systems. MLSWs also can be used for activly dispersing substances ...


    By IEG Technologie GmbH

  • Geodrilling Dec 14: Maintaining Reliable Water Supplies

    This article describes Wessex’s problems with iron contamination and the borehole remediation work it has been doing with BoreSaver and Geoquip Water Solutions over the last four years. Water and sewage-treatment company Wessex water, serving an area of the south-west of England, talks us through its groundwater management programme and rehabilitation efforts. Around half of ...


    By Geoquip Water Solutions

  • Soil and groundwater assessment, south-east England

    Project Remediation Strategies were appointed to undertake a soil and groundwater assessment to assist a client in understanding the potential environmental liabilities associated with the shallow soils beneath part of the site.  The client was undertaking a phased renewal of the site tank farm areas, which required the excavation and replacement of shallow soils to allow for new ...


    By Remediation Strategies Ltd.

  • Emergency response and clean-up of a diesel leak: manufacturing facility

    Project: Emergency response and clean-up of a diesel leak Client: Confidential manufacturing company Services: Emergency response planning, environmental assessment, regulator liaison, remediation design Summary: Through rapid site characterisation and expert decision making ESI minimised the environmental damage ...

  • Horizontal Wells - Technology Overview

    Horizontal well technology has been incorporated into many current environmental remediation applications (and associated contaminants), such as in situ bioremediation, air sparging, vacuum extraction, soil flushing, free product recovery, etc. Ac cording to information reviewed, this technology is most applicable to sites with relatively shallow soil and/or groundwater contamination, and can ...

  • Case study – PCE contamination pilot study

    Site: Dry Cleaner (North Carolina) Contaminant: PCE Soil Type: Saprolite Injection Cost: $35,000 (material & labor) Pilot Treatment Area: approximately 1460 sq. ft. Thickness: 11 to 41 feet bgs Injections: 16 per borehole Groundwater: varies from 13 to 15 feet bgs Site Status: Preparing to proceed with full site treatment – October ...

  • Managanese study: Severn Trent

    Severn Trent Water operates a number of boreholes which abstract water from the underlying Sherwood Sandstone aquifer in the West Midlands.  Prior to 2000, manganese concentrations at one of these sources were reported to be <5µg/l but by 2002 were found to be significantly higher than this.  This posed a possible threat to the source.  Further sampling in 2007 suggested ...

  • Soil and groundwater assessment, North-West England

    Project Remediation Strategies were retained to undertake contamination delineation and assessment work at a logistics depot following an accidental release of a large volume of diesel.  An overnight failure in a joint on a pressurised fuel pipeline had resulted in a loss of 15,000 litres of red diesel. Initial response works identified a small proportion of the diesel had ...


    By Remediation Strategies Ltd.

  • Extraction well design for DNAPL recovery.

    The potential for downward migration of dense nonaqueous phase liquid (DNAPL) into deeper portions of a saturated hydrogeologic unit has important implications for successful groundwater remediation. Little information has been published regarding the design of extraction wells that allow DNAPL recovery without simultaneously creating a conduit for cross contamination by vertical migration ...


    By Hargis + Associates Inc

  • Geostatistical modelling of ground conditions to support the assessment of site contamination

    The pattern of ground contamination across a site depends on the historical pattern of contaminant releases at the surface and the redistribution and the fate of contaminants below the surface. Using these concepts a new site assessment approach (assessment modelling) is proposed based on the development of three stochastic models: a model of the physical structure of the ground materials beneath ...


    By Springer

  • Contaminated land site investigation in Bristol

    Client: Property Developer Location: Bristol, UK Services: Contaminated Land Risk Assessment, Human Health Risk Assessment, Controlled Waters and Ecological Risk Assessment. Summary: ESI’s contaminated land assessment ensured that this former brickworks site was not registered as contaminated land under Part 2A of ...

  • Case study - Multilevel sampling and monitoring, Maryland, USA

    Challenges Volatile Organic Compounds contaminated the groundwater posing a risk to nearby private water supply wells. The traditional approach of drilling and sampling multiple boreholes did not provide adequate data to characterize groundwater flow and contaminant migration in the complex fractured bedrock. Solution Westbay System* was installed ...


  • Evaluating Cleanup at Hamilton Army Airfield Using EQuIS and ArcGIS

    The Sacramento District, US Army Corps of Engineers, is implementing EarthSoft's EQuIS and ArcGIS for better management, analysis, and response to landfill remedial activities being conducted at the former Hamilton Army Airfield. This former Air Force Base located four miles south of the city of Novato, on San Pablo Bay, in Marin County, California, is undergoing environmental clean-up as it is ...


    By EarthSoft, Inc

  • Managing site data and the maintenance of conceptual model and time series outputs at a complex site over an extended period - Case Study

    Background Leakages of TCE and the subsequent groundwater contamination at an industrial facility in Adelaide have led to an ongoing investigation and remediation program conducted since 1999. This work comprised site characterisation and remediation, including borehole drilling, monitoring well installation, soil, groundwater and vapour sampling, laboratory analysis and preliminary ...

  • Spoil, rubble and a soil-tar mix

    National Grid and Wales and West Utilities recently completed their first joint remediation project at the Aberaman Gasworks following the sale of the Wales and south west of England gas network in 2005. Here Scott Lewis from National Grid and Ashley Griffiths from Wales and West Utilities explain the challenges and processes. The project was undertaken using a stabilisation and solidification ...


    By Newzeye Ltd

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