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Fuel Storage for Construction and Civil Projects: Mobile vs Fixed Solutions
A construction site is temporary, it changes shape every few weeks, and its machines are rarely parked in one place. The fuel storage has to keep up with all three.
- Fixed
- Relocatable
- Mobile
- Fuel Control
Fuel storage on a construction or civil project is chosen by how long the job runs, how far the machinery is spread and how often the work moves. A relocatable self-bunded tank at the site compound suits a project that stays in one place for months, because the containment is built into the tank and nothing has to be constructed around it. Fuel trailers and ute tanks suit work that is spread out or moving, such as roads and pipelines, because they take the diesel to the machine. Most larger projects use both: a bulk tank as the site hub and a mobile unit running fuel out to the plant. With several contractors drawing from the same supply, locking, metering and a fuel management system matter as much as capacity. Storage of diesel is addressed by AS 1940 alongside state and local requirements and the principal contractor's site rules.
On a construction site, fuel is the thing nobody notices until it runs out. An excavator that walks back to a fixed tank, or a dozer that waits for a delivery, is expensive plant earning nothing. At the same time, fuel left in the wrong place, unlocked and unrecorded, is a spill risk, a theft risk and a line on the project cost that nobody can explain.
This guide covers how construction fuel use differs from a depot or a farm, the fixed, relocatable and mobile options, how to match them to the project, and how to keep control of the fuel once several contractors are drawing from it.
1,000 to 10,000L The A-FLO Fuelcube self-bunded range, with forklift and crane lifting points as standard
10 to 48 ft The ISO shipping container sizes that Fueltainer self-bunded tanks are built to
Who, what, when What a fuel management system records at every draw, which matters most on a multi-contractor site
Why Construction Fuel Is Different
A transport depot has one fuel point, one operator and the same demand every week. A construction project has none of those. The site is temporary, the fuel demand changes with each stage of the programme, and the plant is spread across the job rather than lined up at a bowser.
| What changes |
On a fixed depot |
On a construction project |
| How long the storage stays |
Years, often permanently |
Months, then it moves to the next job |
| Where the fuel is used |
Vehicles come to the fuel point |
Plant is spread across the site, and some of it barely moves |
| Demand over time |
Steady from week to week |
Heavy during bulk earthworks, lighter once structures go up |
| Who draws fuel |
The company's own drivers |
Several contractors, subcontractors and hire plant |
| Main risks |
Wear, water and fuel ageing |
Theft, impact from plant, dust, and spills reaching stormwater |
Fixed, Relocatable or Mobile
There are three broad ways to hold fuel on a project, and the right answer is often a combination. A-FLO's self-bunded fuel and diesel tanks and fuel trailers and mobile refuelling cover each of them.
Relocatable
Self-bunded cube
Fuelcube tanks run from 1,000 to 10,000 litres, with a lockable equipment cabinet, forklift and crane lifting points, and provisions for generator refuelling.
Large, still movable
Container tank
Fueltainer tanks are built to ISO shipping container dimensions, so they can be moved by truck, rail or container handling equipment without a crane.
To the machine
Fuel trailers
FUELTRANS self-bunded and single skin trailers take the diesel to plant that cannot come to the tank.
Light and quick
Ute tanks
UTECUBE self-bunded tanks sit on a ute tray for topping up light plant, generators and lighting towers around the site.
The difference between fixed and relocatable is mostly about the bund. A single skin tank needs containment built around it, which is a reasonable investment on a site that will be there for years and a poor one on a site that will be gone in six months. A self-bunded tank carries its containment in a second skin, so when the job moves, the tank moves with it and there is nothing left behind to demolish. For very large or long-running projects, Fuelbox self-bunded tanks start at 10,000 litres.
Matching Storage to the Project
The shape of the project decides more than its size does. A compact building site and a 20 kilometre road upgrade can burn similar amounts of diesel and need completely different storage.
| Project |
Setup that usually suits it |
| Short job, a few machines, one location |
A ute tank or a small relocatable cube, refilled by delivery |
| Building or civil project in one place for several months |
A relocatable self-bunded tank at the compound, with fuel management |
| Linear work such as roads, pipelines or rail |
Fuel trailers or service vehicles that move with the work front |
| Large project with plant spread over a big footprint |
A bulk tank as the site hub, and a trailer running fuel out to the plant |
| Generators running site offices, pumps or lighting |
A tank set up for generator refuelling, sized for continuous running |
Generators bring their own sizing questions, which are covered in diesel storage for backup generators.
Sizing for the Programme, Not the Average
Fuel demand on a project follows the programme. Bulk earthworks burn the most diesel, and the volume drops once the heavy plant leaves. Size the storage for the stage that uses the most, then decide whether it stays or moves on when that stage ends.
List the plant for the heaviest stage
Excavators, dozers, rollers, trucks, generators and pumps. Include subcontractor and hire plant if they fill from the site supply.
Estimate the daily burn for that stage
Use records from a similar project if you have them, or ask the plant owners. Real figures for your machines are better than a rule of thumb.
Agree the delivery pattern
How often can a tanker reach the site, and how much notice does the supplier need? Access may change as the site develops, so check it for each stage.
Work out the usable volume, then add a margin
Daily burn multiplied by the days between deliveries is the usable fuel you need. Add the volume the pump cannot reach and a margin for a late delivery, then round up.
Plan the next move
Decide where the tank goes when the stage or the project ends. A tank that can be lifted out and reused on the next job is worth more than one sized perfectly for a site that closes next year.
Where to Put It on Site
The site layout changes as the work progresses, so the fuel point needs a spot that will still work in three months. None of these points replaces the requirements that apply to the project, but each one makes the storage safer and easier to run.
- Inside the compound, and lockable. Fuel left out on the job overnight is an invitation. A lockable cabinet and a fenced compound are the first line of defence.
- Away from haul roads and turning plant. Bollards or barriers protect the tank from the machinery it serves.
- Clear of stormwater drains and waterways. Construction sites already manage sediment and runoff. A fuel spill should stay where the spill kit can reach it. A-FLO's spill containment range covers the response side.
- Reachable by the tanker at every stage. Check that access survives the next stage of works, not just this one.
- Room to lift it out. Leave space for the forklift or crane that will relocate the tank when the job moves on.
Keeping Control of the Fuel
On a site with several contractors, the fuel is shared and the cost usually is not. Without a record, nobody can say which machine or which subcontractor used what, and a missing few hundred litres looks the same as a busy week.
- Lock it. Fuelcube tanks have a lockable equipment cabinet on the front, and Fueltainer tanks have a lockable pump bay.
- Meter every draw. A fuel management system records who drew fuel, into which machine and when, so the fuel can be allocated to the contractor or the cost code that used it.
- Watch the level remotely. Tank level monitoring shows the level without a site visit and helps catch both run-outs and losses.
- Reconcile against deliveries. Delivered litres minus metered litres should match the change in the tank. When it does not, you find out this week rather than at the end of the project.
Moving the Tank Between Stages
Relocatability is the main reason self-bunded tanks suit construction. Because the bund is part of the tank, there is no containment to dismantle and rebuild at the new location. A move still needs care.
Before every move
Check with the transport contractor whether the tank needs to be emptied or partly emptied first. Lift only from the designated forklift pockets or lifting points. Inspect the tank, fittings and connections after the move and record it. Then confirm that the new location meets the requirements that apply there, because a compliant spot on one site says nothing about the next.
Moving fuel by road is a separate question from moving an empty tank. How much diesel you can legally transport and diesel fuel trailers cover what applies.
Fuel Quality on a Dusty Site
Construction sites are hard on fuel. Dust gets into fill points and open containers, tanks are moved and disturbed, and a tank that sits partly full over a long shutdown collects condensation. The damage shows up later, in blocked filters and injector wear.
Compliance
Diesel is a combustible liquid, and its storage is addressed in Australia by AS 1940, alongside state and territory work health and safety and environmental requirements and local council conditions. On a construction project there is usually another layer: the principal contractor's site rules and the project's environmental management plan. What applies depends on how much is stored, how it is contained and where it sits. This article does not state quantity thresholds, separation distances or bunding specifications, because they depend on the site and the jurisdiction, and they change.
A-FLO's plain English guide to AS 1940, EPA and council approvals and the article on council or EPA approval for an above-ground diesel tank are the place to start. Confirm the position for each site before the tank arrives.
What Goes Wrong
- Making plant walk to the fuel. Every trip back to a fixed tank is fuel and hours spent going nowhere.
- A tank sized for the average month. It runs dry in the middle of bulk earthworks.
- Building a bund for a six month job. A self-bunded tank would have moved on with the work.
- No meter, no record. Fuel cannot be allocated to contractors, and losses go unnoticed.
- Siting the tank where the next stage goes. It has to be moved again before the job is half done.
- Leaving it unlocked overnight. Fuel theft from construction sites is common and easy to prevent.
- Assuming the last site's approval carries over. Each site is assessed on its own.
Frequently Asked Questions
What is the best way to store diesel on a construction site?
It depends on how long the project runs and how spread out the plant is. A relocatable self-bunded tank at the compound suits a project in one place for several months. Fuel trailers and ute tanks suit work that is spread out or moving. Larger projects often use a bulk tank as the hub and a mobile unit to take fuel to the plant.
Should I use a fixed tank or a fuel trailer on a construction project?
A fixed or relocatable tank holds more fuel and suits plant that can come to it. A fuel trailer takes the diesel to machines that cannot, such as excavators working far from the compound or crews on linear works. Many projects use a tank for bulk storage and a trailer for distribution.
Why are self-bunded tanks used on construction sites?
A self-bunded tank carries its secondary containment in a second skin, so no bund has to be built around it. When the stage or the project ends, the tank can be lifted out and moved to the next site without leaving any containment structure behind.
How do I size a fuel tank for a construction project?
Size it for the stage of the programme that uses the most diesel, usually bulk earthworks. Multiply the daily burn of the plant in that stage by the days between deliveries, add the volume the pump cannot reach and a margin, then round up. Plan where the tank goes once that stage ends.
How do I stop fuel theft on a construction site?
Keep the tank in a fenced compound with its cabinet or pump bay locked, meter every draw with a fuel management system, and reconcile deliveries against metered use. Remote tank level monitoring shows unexpected drops without anyone having to visit the tank.
Can a self-bunded tank be moved with fuel in it?
Check with the transport contractor first, because some require the tank to be emptied or partly emptied before it is moved. Always lift from the designated lifting points, and inspect the tank and fittings after the move. Moving fuel by road is subject to its own requirements.
Do I need approval for a diesel tank on a construction site?
It depends on the quantity, the tank and the jurisdiction. Diesel storage is addressed by AS 1940 alongside state and territory requirements and local council conditions, and the principal contractor's site rules usually apply as well. Confirm the position for each site before the tank arrives.