A transport business handles pollution risk every day without thinking about it: diesel in the yard tank, oil in the workshop, AdBlue in IBCs, a ruptured saddle tank at the roadside. GOV.UK’s pollution prevention guidance states the baseline in one sentence: you must not let your business cause or allow pollution - pollution being any substance that harms or could harm people or the environment getting into the air, water or ground. The consequences are not a slap on the wrist: an unlimited fine, up to 5 years in prison, or both, plus the whole cost of the clean-up - and after that, compensation to third parties, higher insurance premiums, and lost contracts.
“Cause or allow” does a lot of work. It is not only the driver who knocks the valve off a tanker who is exposed - the business that allowed the conditions for the spill carries the liability too. A leaking yard tank nobody inspected, a delivery nobody supervised, a drain nobody mapped: each is an “allow” waiting for its incident. And the money is only the start. The guidance lists the follow-on costs plainly: third-party compensation, premium increases, contract losses. For a fleet whose customers increasingly audit environmental credentials, a pollution prosecution is a commercial event as much as a legal one.
Depot fuel and oil storage is where the guidance gets specific, and the numbers are worth putting on the wall. Containers need secondary containment - a drip tray or bund with an impermeable base and walls - and the Environment Agency recommends capacities of at least 25% of the container’s capacity for storage up to 205 litres, and at least 110% for containers over 205 litres. The bund must suit what you store, you must not store other materials inside it, and accumulated rainwater has to be removed regularly - a bund full of rainwater is a bund with no capacity left.
Placement rules are just as concrete: storage should be at least 10 metres from watercourses, open drains, gullies, unsurfaced areas or porous surfaces, and at least 50 metres from wells, springs or boreholes. Underground tanks bring their own regime - they must be suitable for the substance, and heavy lorry routes must not pass over the tanks or their pipework, because vibration causes damage over time. In a working yard that last rule bites: the convenient spot for the tank is often exactly where the artics turn.
The single most important drainage fact in the guidance is this: surface water drains discharge directly to the environment. The puddle of diesel that runs into the yard gully is, legally and literally, on its way to a watercourse. Contaminated water must instead go into the foul drain - with your water company’s permission - or be recycled or removed by a registered waste carrier.
That is why the guidance insists on a drain plan: a map showing where the drains are, which type each one is - surface, foul or combined - and where they leave your property. If you do not know, you may need a full drainage survey. The plan is not bureaucracy; it is the document that decides, in the first ten minutes of a spill, whether the pollution stays on your tarmac or reaches the river. Add the standing rules: never put fats, oil or grease down drains, check drains regularly for blockages, leaks and misconnections, and fix any misconnection - you can be fined for one even without a spill.
The guidance expects a pollution incident response plan whatever your storage type - a written answer to “what happens here if there’s a leak, spill or fire”. Its equipment line is specific: have a spill kit, suitable to the products on your site, near storage, loading areas and transfer routes. And deliveries must be supervised, with the people involved knowing what to do if there’s a spill and how to use the kit safely and effectively. A sealed spill kit in a locked cupboard that the night-shift driver has never seen is compliance theatre, not compliance.
For the vehicle side, the same logic travels. A ruptured truck tank or a load leak at the roadside is your incident even off your premises: the driver needs to know to stop the source if safe, keep material out of drains, and report up the chain immediately.
When it goes wrong, one number matters: the Environment Agency incident hotline, 0800 80 70 60, a 24-hour service. The guidance is direct - call immediately if polluting materials have entered or could enter a watercourse or soak into the ground, for example from a ruptured tank, leaking pipe or uncontained spill. “Could enter” is the trigger, not “has entered”: you do not wait to see how far it spreads. Scotland, Wales and Northern Ireland have their own reporting routes, so multi-depot operators should pin the right route to each site’s plan.
The whole regime compresses into an afternoon’s audit. Walk the yard with the drain plan question: where does water from here actually go? Check every container for containment - 25% or 110%, nothing else stored in the bund, rainwater pumped out. Confirm storage distances from drains and watercourses. Put the right spill kit at each risk point and train everyone who might be first on scene, including drivers. Supervise every fuel delivery. Write the incident response plan with the hotline number on page one.
None of this is exotic, and none of it is expensive next to an unlimited fine plus a clean-up bill plus the customer who reads about it. Pollution law is one of the few regimes where the guidance tells you exactly what good looks like before the incident - the businesses that get prosecuted are usually the ones who never read it.