Underground tank leak detection in Al Nasrya, Riyadh: without breaking

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

Why underground tank leak detection differs in Al Nasrya

The centre of Al Nasrya is at 24.6474, 46.6788, about 7.4 km from the centre of Riyadh, with an approximate radius of 1.2 km. The service-area circle on the map below is drawn from this point. Main roads in or near Al Nasrya: Prince Talal bin Abdulaziz Road, King Saud Road, Prince Sattam bin Abdulaziz Road.

The centre of Al Nasrya sits about 607 m above sea level (SRTM open elevation data). The nearest wadi channel is about 2.3 km from the centre of Al Nasrya (OpenStreetMap).

Is there a fuel or water tank under my property in Al Nasrya, Riyadh, and could it be leaking? Owners here often ask this after noticing a sudden drop in stored volume, a damp patch near the yard, or a smell that comes and goes. Al Nasrya sits at 24.6474, 46.6788, about 7.4 km from the centre of Riyadh, and the district covers an approximate radius of 1.2 km. The centre of the area sits about 607 m above sea level, and the nearest wadi channel lies about 2.3 km away. Those facts matter because ground conditions and drainage paths differ across the district, so a leak check should be tailored to the specific site rather than assumed from the neighbourhood.

The inspection starts with a review of the tank's history, including its age, its capacity and any past repairs or coating work. The technician then checks the fill and vent lines, the dispensing points and the surrounding ground for signs of seepage. Where the internal condition is in doubt, the tank may need to be examined from inside, and if the interior surface is worn or corroded, internal coating is one of the options discussed. Internal coating is priced per square metre, typically SAR 25–65 per m², so the tank's surface area determines the likely range. Each step is recorded so the owner can see exactly what was tested and what was found.

Before the visit, gather any records you have: installation papers, previous inspection reports, and stock-level logs showing how your fuel or water use has changed over recent weeks. Note when you first noticed the problem, where any wet ground or odour appears, and whether the tank is above or below the surface. Clear access to the tank cover, the pump area and the piping route will save time on site. Tell the technician whether the property is near the drainage path toward the nearby wadi, since rainfall runoff can affect what is seen on the ground. Having this information ready helps the inspection focus on the right areas from the start.

The aim is to locate the cause with instruments first, so any opening is limited to one point.

Signs worth paying attention to

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

• A noticeable drop in the water level overnight
• The pump runs for longer periods
• The tank needs refilling faster than usual
• Damp or salt marks on the tiles above the tank

The most common causes

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

Tools and methods, and when we use them

From the first visit to the report

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.

Al Nasrya in facts and sources

Questions from Al Nasrya

Common mistakes we see

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

What you receive

You receive: the written level-test result and the recommended next step, in a technical report with a verification code.