A fuel station is one of the most environmentally sensitive sites in a city. Beneath a forecourt that looks like just another asphalt lot, tens of thousands of liters of fuel are stored a few meters from the soil, from the municipal drainage and sometimes from the groundwater. A small leak that goes undetected can contaminate soil and water for years, cost millions in cleanup and close the station. That is why the environmental regulation around fuel stations is among the strictest in the construction industry, and it affects almost every design decision: which tanks, which piping, how to pave and what equipment goes on the dispensers.
The article has two parts: first what the regulations require and how each protection system works, and then how we at S. Gotovski put it into practice at every station we build or renovate, since 1972.
Part A: two kinds of contamination, two protection systems
The environmental risks at a fuel station fall into two kinds, each with its own protection system:
- Air pollution: Fuel vapors released when a tanker unloads into the tank and when a vehicle is refueled. The vapors contain volatile organic compounds, including benzene, a carcinogen. In high concentrations this is a health hazard for staff and customers.
- Soil and groundwater contamination: Fuel leaking from a tank, from piping, from a fill sump or from a cracked forecourt seeps into the ground. In sandy soil, as in most of the coastal plain, it reaches the groundwater quickly.
Vapor recovery: Stage I and Stage II
Vapor recovery systems capture the vapors and return them to the tank instead of releasing them into the air:
- Stage I, vapor recovery during tank filling: When a tanker unloads fuel into the underground tank, the vapors displaced from the tank are returned to the tanker through a dedicated hose. The requirement applies to the tanks, the fill points and the vapor piping.
- Stage II, vapor recovery during refueling: While a vehicle is refueled, the vapors displaced from its tank are drawn back through the nozzle and the vapor piping into the underground tank. This requires dedicated nozzles, dispensers with a vacuum unit and separate vapor piping from the dispenser to the tank.
In execution terms, Stage II means an additional pipe route that has to be designed and laid together with the fuel piping, plus periodic efficiency tests of the system. In an old-station renovation, the Stage II upgrade is often the reason the forecourt is opened in the first place.
Double-wall tanks
A double-wall tank is built from two walls with a space between them. A leak from the inner wall is stopped by the outer wall, and a sensor in the interstitial space raises an alarm before a single drop reaches the ground. This is the standard for new tanks, and usually the requirement when replacing old ones.
Double-wall piping and leak detection
The same principle applies to the piping: a pipe within a pipe, with the space between them drained or monitored to a detection point. Pipe connections are made inside sealed sumps under the dispensers and above the tanks, so that even a leak at a joint is collected and detected.
Tank monitoring and fuel reconciliation
An electronic monitoring system tracks the fuel level in the tanks and compares what came in, what was sold and what remains. A consistent gap is an indication of a leak, even when the sensors have not triggered. In sensitive locations, monitoring wells around the tank pit are also required.
Sealed paving and an oil and fuel separator
The forecourt and the fill area must be a sealed surface, usually reinforced concrete, with slopes that lead every liquid to collection channels and from there to an oil and fuel separator. The separator separates the fuel and oil from the water before the water continues into the drainage system. Unsealed paving or wrong slopes are among the common defects found in inspections.
Summary of the requirements and their impact on execution
| Requirement | Impact on execution |
|---|---|
| Stage II vapor recovery | Additional vapor piping, suitable dispensers and nozzles, efficiency tests |
| Double-wall tanks | Precise tank pit, anchoring, interstitial sensors, tightness test before backfill |
| Double-wall piping | Sealed sumps under the dispensers, documented pressure tests, leak detection |
| Sealed paving | Reinforced concrete with calculated slopes, collection channels, oil and fuel separator |
| Monitoring and control | Tank gauging system, fuel reconciliation records, sometimes monitoring wells |
Part B: how we protect the environment on every project
This is how the principles above look in our work, at every station we build or renovate:
1. Double-wall tanks and piping, from day one
Every underground tank we set is a double-wall tank, and every fuel line runs inside a containment pipe with connection points inside sealed sumps. At the Nober station in Ashdod, for example, we laid fiberglass fuel piping and a double-wall fill system as part of the station's rebuild.
2. Sealed sumps and a code-compliant spill bucket
The fill points, the submersible pumps and the pipe connections sit inside sealed sumps that collect every drip. The spill bucket under the tanker unloading point is built to catch what spills while the hose is connected and disconnected, in line with the standard's "5 gallon" requirement. At the Gal HaRishonim station in Ashdod we are installing rectangular sumps that prevent fuel leaking into the ground as part of the station's renovation.
3. New vapor recovery piping
We install Stage II vapor recovery piping both in new builds and in upgrades of existing stations. It is an environmental requirement, but also a health one: the station staff breathe that air all day.
4. Drainage channels and fuel separators
Rain and washing of the forecourt carry fuel and oil residues. Instead of letting them run into the municipal drainage, the forecourt drains through channels to a fuel and oil separator. At the Hetzi Hinam station in Holon we built runoff drainage channels and installed a fuel separator as part of the rebuild.
5. Cathodic protection and static electricity
Underground steel tanks corrode over the years, and a corroded tank is a tank that will leak. A cathodic protection system slows that process significantly, and grounding systems against static electricity prevent a spark during fuel unloading. Both systems are a fixed part of every station we hand over.
6. Documented pressure and tightness tests
Before the forecourt is sealed with concrete, every pipe section and every tank undergoes a pressure and tightness test, and the results are documented and handed to the client. This is the stage where every defect is found while it is still cheap to fix, before it becomes a leak under the concrete.
7. Dealing with legacy contaminated soil
When renovating an old station we sometimes meet the result of decades without these standards: fuel-soaked soil around the old tanks. In that case the contaminated soil is excavated and taken to a licensed treatment site, and clean soil is placed instead. That is what we did at the Dor Alon station in Eilot, where we also removed sumps that had collapsed above the tanks and built new concrete sumps to Ministry of Environmental Protection standards.
8. A work site that does not harm the environment
- Waste and fuel residues from the old tanks and piping are removed in a controlled way, not into the construction skip.
- Fencing and separation between the work zone and the positions that stay in operation, so that customers and staff are not exposed to the open excavation.
- Dust and noise are controlled through work phasing and working hours coordinated with the station, especially in residential areas.
- Permanent crews who have completed safety training and know the requirements of the fuel companies and the authorities.
Upgrading an old station without closing it
In an old-station renovation the central question is the sequence of work: how to replace tanks, piping and paving while the station keeps selling fuel. Proper phasing, with some of the positions active at every stage, is the difference between days of downtime and weeks. Most of our upgrades are done this way, at operating stations.
Why it pays off for the station owner too
Beyond the legal obligation, a station built to the environmental standard is a cheaper station over time. It does not get closed over a contamination finding, does not need expensive soil remediation, obtains and renews its business license without delays, and lasts for decades without opening the forecourt again. The major fuel companies demand this of every contractor who works with them, and that is why we have been working alongside them for years.
FAQ
Does every station need Stage II?
The requirement applies under the regulations and the business license conditions, and usually depends on the station's gasoline sales volume. At new stations it is standard practice to design the system in from the start even when the threshold has not yet been reached, because adding it later is far more expensive.
What happens when a leak is found at an existing station?
The competent authorities must be notified, use of the relevant tank or line stopped, and a soil survey carried out. Depending on the findings, soil remediation is required, which can include excavating and removing contaminated soil to a licensed site and replacing the infrastructure.
Can an old single-wall tank be left in place?
It depends on the tank's age, its condition and the requirements that apply to the station. In most cases, once the forecourt is opened for an upgrade, it pays to replace the tanks with double-wall ones and close the matter for decades.
Can a station be upgraded to the environmental standards without closing it?
Yes. The work is done in phases, every work zone is fenced, and some of the fueling positions keep operating throughout the project.
Planning an environmental upgrade of a station, or a new build? Talk to Us, and we will gladly go over the plans and point out what matters most to get right from day one.