Bulk Diesel Storage Compliance in Australia

01Why compliance is simpler than it looks

Every Australian business that stores diesel on site operates inside three layers of rules: the national standard AS 1940, your state or territory's workplace and dangerous-goods legislation, and your local council's planning controls.

It sounds daunting. In practice, for a typical above-ground installation, the pathway is short and well-trodden. The single biggest cost and delay comes from doing it in the wrong order, specifying a tank first and discovering the compliance obligations afterwards. Tank size, fuel type and placement all drive which rules apply. Get the compliance picture first, then specify the tank, and most installations are operational the moment they are commissioned.

02AS 1940, the national standard

Australian Standard AS 1940:2017 – The storage and handling of flammable and combustible liquids is the technical rulebook for fuel storage in Australia. It is not itself a law, but it is referenced by every state and territory's work-health-and-safety and dangerous-goods legislation, which makes conformance effectively mandatory.

The current edition was published in 2017 and remains in force. If you are reading older guidance, watch for two things it changed: the upper boundary of the C1 combustible class dropped from 150°C to 93°C (to align with the global GHS system), and the standard tightened requirements around safe fill levels and spill response.

03How diesel is classified

Classification is the foundation of everything else, because the setback distances, alarm triggers and placarding volumes all flow from it. AS 1940 sorts liquids by flash point, the temperature at which they give off enough vapour to ignite.

Standard mineral diesel sits in Class C1, with a flash point typically around 62°C and above. That single fact is why diesel is far easier to store than petrol: it needs smaller separation distances, fewer ignition controls, and a higher threshold before placarding and licensing kick in. Always check the product's Safety Data Sheet, because some winter or blended diesels can test lower.

04The key AS 1940 requirements

These are the requirements that decide whether an above-ground diesel installation passes or fails an inspection.

05Separation & setback distances

This is where the "7.5 m" figure gets misquoted. AS 1940 does not require every diesel tank to sit 7.5 m from everything. It sets distances that scale with tank capacity up to a cap, and 7.5 m is the upper end for large C1 tanks. A modest tank on a typical site needs considerably less, and fire-rated tanks can reduce the required distance further.

Because the exact figure depends on tank size, what you are separating from (a protected place, a boundary, an ignition source) and whether the tank is fire-rated, it is worth confirming against the table before you prepare the base. We keep a plain-English reference for this:

06Self-bunded tanks, the shortcut

The self-bunded (double-wall) tank is the single biggest compliance advantage available for above-ground diesel storage. It is a tank within a tank: the space between the inner and outer skins provides the 110% secondary containment AS 1940 requires, with no external civil works.

That matters because the engineered bund, a concrete compound designed, approved and built around a single-skin tank, was historically the most expensive, slowest and most approval-intensive part of any fuel installation. A self-bunded tank removes it entirely. The tank arrives compliant, sits on a prepared hardstand, and can be relocated later.

• Built-in 110% containment, no separate concrete bund to design or build
• Relocatable, so it is usually treated as plant rather than a permanent structure (simpler planning)
• Faster to deploy, often the difference between weeks and months
• Up to 200,000 L permitted for combustible liquids on mine sites under AS 1940:2017

The GO self-bunded range

GO Industrial designs, supplies and installs the full self-bunded range nationally, every tank compliant to AS 1940 from the factory.

GO BOX

Compact workshop & depot tanks

GO STORE

Mid-size stationary storage

GO CON

Containerised & mine-site systems

Fire-Rated

For tight setback distances

Fuel Trailers

Mobile site refuelling

Browse the complete self-bunded tank range.

07Placard, manifest & notification volumes

Above certain stored quantities you must placard the site, hold a manifest, and notify the regulator. These thresholds come from the workplace hazardous-chemicals rules (not AS 1940 itself), and this is the area most commonly misreported online.

08State & territory rules at a glance

AS 1940 is the constant. Who enforces it, and under which instrument, changes at the border. Diesel is captured everywhere, either as a hazardous chemical (in the harmonised WHS states) or as a C1 combustible liquid (in Victoria and WA, which keep a dangerous-goods model).

Instruments are updated periodically. Confirm the current version and your site's obligations with the relevant regulator before installing.

09When you need council approval

10The compliance pathway, step by step

11Ongoing obligations & fuel tax credits

Compliance does not stop at commissioning. Plan for routine visual inspection of the tank, containment, venting and dispensing equipment; maintenance of pumps and meters; replenishing the spill kit after any use; and keeping signage legible. Larger sites, particularly in mining and in WA and the NT, may be audited periodically by the dangerous-goods authority.

Turn records into a bigger fuel tax credit

The ATO requires accurate records of the diesel you dispense and the activities it was used for to substantiate fuel tax credit (FTC) claims. You must keep FTC records for five years, you have four years to claim, and for larger claims the ATO expects a defensible method that apportions litres to each eligible activity.

12Common mistakes to avoid

13Frequently asked questions