tank integrity testing failIntegrity testing or otherwise known tank tightness testing is the most accurate method to ensure the ability of a bulk storage unit to be integral or complete. By pressure differentiation testing for a non-integral system DTTA can ensure that the system is complete by monitoring for allowed pressure drops over time.

Acoustic signature data collection during the pressure differentiation test provides data which can link any pressure drops to specific characteristics, allowing DTTA the ability to determine the likely causes of the pressure deviation.

DTTA’s unique testing systems have been tailored from USPS systems to suit the Australian market, with the ability to assess the integrity of underground and surface bulk storage tanks including surge units and day tanks as well as piping networks for ventilation, fuel feed and return systems and pump circuits.

Tank integrity testing allows DTTA technicians to provide accurate assessment and reporting on the integrity of the bulk storage unit and the surrounding components.


isi diesel fuel tank integrity inspection‘ISI’ servicing gives you a visual assessment of your bulk storage tanks interior.

Using remote camera technology, the internal surface inspection service allows DTTA technicians to visually inspect and provide accurate assessment of the internal surfaces of the bulk storage unit.

The ISI service allows your DTTA technician access to accurate data and imagery of any imperfections found in the internal surfaces as well as any corrosion or damage to your bulk storage unit.

ISI also provides a visual indication of the bulk stored diesel cleanliness and condition, allowing DTTA to record and provide documentation for any imperfections and monitor or rectify any potential hazards.

On-site inspection services are a cost effective method of ensuring the compliance of your bulk storage system.

DTTA on-site inspection services are available for all bulk storage units both above and below ground as well as infill and supply piping networks and auxiliaries.

On-site integrity inspections are mandatory for compliance and certification of bulk storage systems every 12 months after any new installations, changes or upgrades. decommission or removal works also require an on-site integrity inspection to ensure environmental stability and prevent any environmental liability once completed.

On site inspection services allow DTTA technicians to assess the installed system and auxiliaries, identify any potential hazards and provide in depth reporting of the system components and quality.

Using a water finding paste that turns purple with any evidence of water in the fuel is our first test to determine the integrity of the tank and also gives an instant indication of the quality of the fuel.

Test your own diesel fuel with our Free Water Test Kit here!

This type of tank is not visible to the naked eye; they are located underground usually beneath a car park basement, road or concreted area. As these tanks are not visible they are easily overlooked.

As outlined by the EPA “All practicable measures must be taken to prevent pollution of groundwater and pollution of land. This includes measures taken to prevent leakage of product from any UPSS (Underground Petroleum Storage Tanks) , irrespective of age.” - Publication number 888.4

Day tanks, also known as Auxiliary tanks, are a secondary fuel tank located between the main fuel tanks and the pump/generators.

It is essential that day tanks are well maintained and regularly serviced as they are a key component in the successful functioning of the diesel generator system.

Day tanks need to be tested for internal alarm systems, damage, contamination, cleanliness and corrosion.

This type tank is located above ground and is generally easier to inspect visually.

While you may think that a visible inspection of the tank exterior will clearly display signs of weathering or leaking, this is not always the case. Small leaks or unseen damage may be present in hidden or covered areas.

Transfer systems are unique to each facility installation and are the main issues of diesel generator failure. This is mainly due to mismanagement and poor maintenance causing system failure due to lack of provision of back-up fuel to the generating facility.

From this it can be seen that proper inspection and testing of transfer systems should be conducted to reduce chances of equipment failure.

Pipework’s are the pipes that run the diesel from the main tanks, to the day tank and into the generator. They are also the ventilation pipes and disposal pipes.

It is essential that integrity tests are performed on pipework to check for any leakage, blockages and rust corrosion.