Underground Fuel Tank Excavation & RemovalThe Fuel Tank excavation process begins with a thorough site study including borehole soil tests for contamination and safe dispoal. Following removal all materials are recycled while rigidly observing safety and environmental regulations
Fuel Tank Excavation
Underground fuel tank excavation is not just about digging a lump of metal from the ground; to do it safely requires many special skills. The whole process begins in the office with a thorough study of all available plans, so we can get the best idea possible of what is below ground. As well as the most recently used tanks and pipe work, there may be old disused tanks that need excavating and services that need to be avoided and/or cut off.
We then carry out on-site surveys with a CAT scanner, to add to the information from site plans. Many sites have been in use for decades, so information is often incomplete. We also carry out surface and borehole soil tests before and during excavation, to identify any contamination due to leaks. Contaminated soil is taken to a licensed site for safe disposal, to be replaced by clean material.
If the tank has not already been made safe with water or inert material, it will need de-gassing – usually with Nitro-foam – to expel the potentially explosive fuel/air mix and make it safe to work on.
Safely Removing Fuel Tank
We then expose the top of the tank and cold cut a large hole in the top, so our operative can safely access the tank to remove sludge and clean the tank by scrubbing the interior thoroughly. All contamination is again sent to a licensed site, while the cleaned tank goes for recycling. Personnel who enter the tank are fully trained in confined space working, are attached to a harness and safety-line and wear breathing apparatus with protective clothing at all times while decontaminating tanks.
Our preferred method of tank cleaning is man entry, as we believe this is the most thorough and efficient, but we are also experienced in and equipped for high pressure jet washing without man entry. For this we use a lance with a universal swivelling head to clean without streaking. As much water as possible is cleaned and recycled to reduce disposal costs.
Our cold cutting techniques also mean we can cut up a tank in-situ and remove it piece by piece. Following underground fuel tank removal, all materials are recycled and all safety and environmental regulations are rigidly observed.