Groundwater Issue Case Studies

Case Study One

Project type: Escape of kerosene within a Source Protection Zone (SPZ1)
Project reserve: £100,000
Project duration: 3 years

In this incident around 1775 litres of kerosene were estimated to have been lost to ground with an Environment Agency Source Protection Zone (SPZ1). A public water extraction point located only 270m away from the spill origin, down gradient, was at risk.

The remediation pursued two aspects. Firstly, the remediation of buildings which consisted of contaminated garage walls, foundations, floors and sub-floors; and secondly the risks of impacting controlled waters in the form of a water table at 10-20m below ground level and a public water extraction point within 270m.

Deep excavations were required to remove superficial contamination to over 2m below ground level and in-situ bioremediation techniques were also employed. A monitoring programme was implemented for 3 years after the incident date utilising deep groundwater monitoring bore holes.

Case Study Two

Project type: Fuel line leak in an environmentally sensitive hill top location
Project reserve: £210,000
Project duration: 18 months

In this incident, around 1,000 litres of kerosene were estimated to have escaped to ground next to the property with walls, foundations, floors and sub-floors impacted. The nature of the ground facilitated deep penetration of fuel to a water table at around 6m below ground level, putting at risk local private water extraction points and a nearby stream.

Groundwater remediation took place with an extended monitoring period of 18 months from the incident, utilising deep bore holes for groundwater monitoring purposes and for contaminated water extraction.

  • "Everyone was so courteous and helpful! "

    Angela – Christchurch
  • "Once again thank you for your marvellous help and support through this difficult year."

    Caroline - Mawnan
  • "Thank you for all of your assistance and advice."

    Nic - St. Agnes
  • "I would say I was mighty impressed with the work today and the tidy way in which the area was left, please let your team know. They completed what they had planned and left the property very tidy. If I required other groundwork, I would certainly use them."

    David – Woolton Hill
  • "It was great to see the site returned to normal and thank you for your efforts on our behalf, many thanks"

    Clare – Thruxton
  • "Thank you very much for dealing with our escape of fuel. We are very pleased with all that you and your team have done."

    Ben – Newquay
  • "Once again, many thanks for how you have conducted your business and the ongoing updates."

    Neil – Glastonbury
  • "Thank you for all your hard work and diplomacy over the past few months. Your team have been fantastic, really flexible, accommodating and the owners are very pleased with the finish."

    Bella – Lewis
  • "Thanks for being so considerate, we really appreciated it."

    Luke – Cranborne
  • "Your team did a great job and we are really pleased with the work."

    Andrew – Furners Green
  • "I would also like to say how impressed I am with your team who are undertaking the work, they have worked very hard in quite testing conditions with minimum damage to the garden."

    James – Tintagel
  • "Thanks for all your help with the co-ordination and keeping me informed of the progress along the line. I am so happy to be back home."

    Susanna - Charlton
  • "From start to finish the care and attention paid to minimising our inconvenience and the standard of workmanship was exceptional."

    Roger - Fernhurst
  • "Thank you for all of your assistance with this claim. It's great to have such a happy customer."

    Sue - Dunstable
  • "Thanks to all those involved in the work associated with this claim - From our point of view it could not have been handled better."

    Roger - Bosham
  • "I have been very impressed by the professionalism and helpfulness of the OLM team. "

    Richard - Kencot
  • "We were fearing disruption and possible permanent disfiguring of our historic property. However, once work started it became apparent that we were in very safe hands."

    Roger - Fernhurst
  • "A huge thank you for all your help and guidance. You’ve been so helpful, I wouldn’t really have known what to do without you telling me who to speak to and what to say."

    Helen - Stoner
  • "Thanking you for your efforts in bringing this to a successful conclusion."

    Brian - Queen Camel
  • "OLM have looked after the project well. We are very impressed with all the workforce involved. Many thanks."

    David - Eaton
  • "We really appreciated not just your professionalism but also the support and understanding of our predicament, and the care and concern with which you approached the task. Your guidance meant a lot"

    Stephanie - Much Marcle

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