Underground tank leak detection for restaurants in Arqa, Riyadh

Prepared by the technical team · editorial review · last updated 13 November 2026 · Sources

What is specific about Arqa for underground tank leak detection

The centre of Arqa is at 24.6841, 46.5826, about 9.9 km from the centre of Riyadh, with an approximate radius of 3.8 km. The approximate area shown on the map is centred here. The nearest wadi channel is about 2 km from the centre of Arqa (OpenStreetMap).

The centre of Arqa sits about 686 m above sea level (SRTM open elevation data). Main roads in or near Arqa: Western Ring Road, Prince Mishaal bin Abdulaziz Road, Prince Mishaal bin Abdulaziz.

Underground tanks at restaurants most often fail quietly. Grease traps, fuel or water storage tanks and their connecting pipework can leak for months before anyone notices a drop in volume or a damp patch in the yard. For a kitchen-heavy business in Arqa, the first warning is usually a change in consumption that cannot be explained by trading, followed by a smell near drains or unexplained wetness on the ground above the tank. Detection should therefore start with the records you already hold, then move to a physical check of the tank and its lines.

Arqa is a useful place to see how local conditions shape the work. The centre of Arqa is at 24.6841, 46.5826, about 9.9 km from the centre of Riyadh, with an approximate radius of 3.8 km, so most restaurant sites here sit in a compact, built-up area where tanks may be close to neighbouring buildings and service roads. The centre of Arqa sits about 686 m above sea level (SRTM open elevation data), a height that matters for how fluids and groundwater move through the soil around a buried tank. The nearest wadi channel is about 2 km from the centre of Arqa (OpenStreetMap), so water runoff after rain can carry any leaked material toward low ground. Because of this, the inspection should look at surrounding drainage and soil conditions as well as the tank itself, and a leak found here is treated as a possible pathway to the wider area.

Before booking a visit, ask the provider to confirm exactly what will be tested and by what method, and whether the tank will be checked for leaks in its walls, seams and fittings as well as in the pipework. Ask whether the work includes a survey of the surrounding ground and drainage, and how any findings will be recorded and shared with you. If repairs may be needed, ask for the cost basis up front: where internal coating is part of the job, the price is quoted per square metre at SAR 25–70 per m², so request the measured area in writing before work starts. Finally, ask how the site will be left after testing, including any excavation, reinstatement and access arrangements for your kitchen staff.

For restaurants, visits are planned outside service hours and recorded for the premises file.

When do you need underground tank leak detection?

These are the signs most often linked to underground tank leak detection:

• Damp or salt marks on the tiles above the tank
• The tank needs refilling faster than usual
• The pump runs for longer periods

Causes we see in the field

• Cracks in the concrete tank walls or floor.
• Construction joints and corners — we check this before anything else.
• A common cause: a float valve that does not close, so water is wasted.

Tools and methods, and when we use them

The steps in order

1. Safety first: Tank lids and confined spaces are handled with ventilation and a second person on site.
2. Documented level test: Filling and use are stopped and the level is recorded against time.
3. Isolating the tank from the network: This tells us whether the loss is from the tank body or from the supply line.
4. Checking the body and connections: Inlet, outlet and overflow connections are inspected.
5. Recommendation: You get the next step in writing: repair, waterproofing or a line test.

Facts and costs — Arqa

Questions from Arqa

What we advise against

• Ignoring the float valve
• Waterproofing the tank before confirming the loss is from the tank and not the line

The written outputs

The written output: the written level-test result and the recommended next step. The report is numbered and can be checked with its verification code.