Underground tank leak detection in Al Hzm, Riyadh: emergency

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

Before we start: what we know about Al Hzm

The centre of Al Hzm is at 24.5473, 46.6536, about 18.6 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 Hzm: Dirab Road, Najm al-Din al-Ayyubi Street, Al Sahra Road.

The nearest wadi channel is about 0.8 km from the centre of Al Hzm (OpenStreetMap). The centre of Al Hzm sits about 676 m above sea level (SRTM open elevation data).

A homeowner in Al Hzm notices the water bill has crept up, or the smell of fuel drifts across the yard, or the diesel gauge no longer matches what the pumps should be drawing. Underground tanks are easy to forget until something feels wrong, and by then the question is urgent: is fuel or water escaping, and is it reaching the ground around the house? Owners of villas, farms and small commercial sites in this part of Riyadh often face the same worry at the same time, usually without a clear picture of what is buried beneath the driveway.

The local setting shapes how serious a leak can become. Al Hzm sits at roughly 676 metres above sea level, about 18.6 km from the centre of Riyadh, and its centre lies at 24.5473, 46.6536. The nearest wadi channel runs about 0.8 km from the centre, so during heavy rain water can move across the surface and carry seepage with it. For an owner, this means a leak is not only a loss of product but a possible route for contamination toward low ground. Waiting for the problem to resolve itself is rarely a safe choice, and quick checks matter more here than they might in a flat, enclosed plot.

If you suspect a leak, act in this order. First, stop filling or drawing from the affected tank and keep ignition sources away from the area. Second, record the current gauge reading, the date and the time, and compare it with your last reliable reading to estimate how fast the level is falling. Third, check the surrounding ground and nearby drains for wet patches, staining or odour, and note where they appear. Fourth, arrange a tightness test or inspection by a qualified technician before any repair work begins, so the findings are documented. Finally, if repairs are needed, ask for a written quote that shows the internal coating price per square metre, which typically falls within SAR 25–70 per m², so you can compare the scope of work clearly before approving it.

If water is flowing, close the main valve first, then call or message with photos.

Signs that call for underground tank leak detection

If you notice one of these signs in Al Hzm, it is a good moment to talk to the team:

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

Causes we see in the field

• A float valve that does not close, so water is wasted.
• A common cause: cracks in the concrete tank walls or floor.
• Construction joints and corners.

How we choose the tool in Al Hzm

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.

Al Hzm in facts and sources

Questions from Al Hzm

Mistakes that cost more

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

What you receive

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.