Contaminated diesel fuel is a major cause of engine failures, which can lead to downtime and expensive repair costs.
Accurate diesel fuel sampling allows you to determine both your fuel quality and your risk status. Knowing the quality of your diesel fuel early provides important information that allows you to act and take preventative measures to avoid costly and premature engine failures.
Sampling your diesel fuel
Most contaminant will settle in the bottom 30% of the tank.To analyse the fuel from your tank, we take samples using an approved diesel fuel sampling device that is appropriate for your tank type and volume. Our special equipment will not create a negative pressure in your tank higher than - 5 HG.
We take our fuel samples from the 'red area" located at the bottom of your diesel tank as close as possible to the nozzle of the tank. The area we sample from is critical because most contaminants settle in the bottom 30% of the tank, and it is from this area that fuel is taken when the diesel engine is running.
After collection, the diesel fuel sample is filled directly into compatible, tamper-proof containers with a capacity of at least 250 ml or 1000 ml, depending on the required laboratory analyses and parameters.
Diesel fuel sampling results
Benchmarking your fuel's performance helps you make the right decisions for your business.After fuel samples are collected, they are independently analysed and a comprehensive report is generated. This process can take 2-5 days depending on the test parameters.
The results of our sampling are related to numerous indicators of diesel fuel, such as:
- Oxidative stability
- Cetane rating
- Water and sediment content
- Sulphur content
The diesel fuel analysis reports we produce are designed to highlight the risk associated with each sample.
These can be supplied by numerous accredited independent laboratories for additional parameters or validation if required.
How often should diesel fuel tanks be sampled and analysed?
Frequent sampling and analysis ensures safety and efficiency.Regular sampling and analysis provides a good overview of fuel quality, so we can trace any problems back to the source before - and even after - they occur.
We recommend sampling and analysis every 6 months to ensure that your tank and the fuel it contains remain intact and operating safely and efficiently.
The DDS process
Our procedures are suitable for any of your site-specific requirements.Fuel sampling by Diesel Decontamination Services utilises recognised, approved equipment and procedures to ensure compliance with all regulatory safety requirements for on-site fuel sampling.
Because we operate in many high-security and highly regulated industries, you can be assured that our fuel sampling procedures are appropriate for your site-specific safety and permitting requirements.
If your fuel samples yield questionable results, Diesel Decontamination Services can also assist you with our mobile fuel tank cleaning and fuel remediation services.
- Agriculture
- Defence
- Facilities Management
- Food
- Government
- Health & Medical Facilities
- Infrastructure & Essential Services
- Manufacturing
- Marine
- Power Generation
- Rail Operators
- Shopping Centres
- Transport
- Utilities
- And many more.
Big or small – we've sampled them all
We have the knowledge and experience that's right for your business.Over the years, we have sampled diesel fuel from tanks of all shapes and sizes. From 200-litre tanks on boats to 240,000-litre tanks for utilities and many different industries:

