Decommissioning and Abandonment of unwanted fuel systems

Fuel Systems which are no longer in use, either through redundancy or integrity issues, need to be decommissioned carefully and correctly. Unwanted fuel storage systems including pipework can still contain flammable liquids and vapours. Leaking systems will have caused soil and groundwater contamination.

Consideration must be given to where the tanks are situated and whether removal will interfere with structural integrity of nearby buildings. Excavating a fuel tank can result in a larger than expected “hole” especially if contaminated soil must be removed beyond the size of the tank cavity limits.

Fuel and chemical tanks MUST be totally degassed and made safe before any further work can take place, the risk of explosion from remaining vapour cannot be stressed enough, this is a job for duly qualified competent and experienced fuel systems engineers and technicians.

Our services include:

  • Dial B4 U Dig
  • Ground Search
  • Tank and Line Integrity Testing
  • Residual Product pump out and legal disposal
  • Degassing
  • Safe Tank removal and transport preparation.
  • Legal Disposal Certificate (Old UST’s must not be re-used.)
  • Assessment for possible in-situ abandonment with dry cell foam.

Petrolink Engineering is duly qualified and holds a special Demolition Licence with Chemical Endorsement for the safe and legal removal of Hazardous Chemical systems.


Prior to commencing decommissioning, a Validation Report must be served on the Local Council showing the system has not leaked or, if it has, all contamination has been remediated.

If soil or groundwater sample analysis show signs of contamination above accepted EPA thresholds then the area containing the contamination must be remediated. This may include site bio-remediation or total replacement of the affected soils with virgin material. A Validation Report must be submitted to Local Council within 60 days.

Our services include:

  • Bore Hole drilling
  • Ground Water Monitor Well Installation and Monitoring
  • Ground Water flow direction
  • soil sampling and analysis by NATA Registered Laboratory
  • Remediation Action Planning (RAP) and carrying out the requirements of the RAP.
The Underground Petroleum Storage System Regulations (UPSS Regs) and Australian Standard AS4976-08 detail the correct legal and practical procedures which must be followed to safely decommission abandon and remediate UPSS sites to avoid potentially fatal injuries and severe penalties.

Petrolink Engineering’s Environmental Support Services Team has over 30 years’ experience dealing with soil and groundwater analysis with pragmatic and practical remediation strategies.

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