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

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

Why underground tank leak detection differs in 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 approximate area shown on the map is centred here. 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). Main roads in or near Al Hzm: Dirab Road, Najm al-Din al-Ayyubi Street, Al Sahra Road.

Underground fuel and water tanks in Al Hzm most often fail quietly. A slow seep through a corroded seam, a cracked fill pipe or a loose vent fitting may go unnoticed for months, and by the time the level drops or soil smells of fuel, the damage has spread. Leak detection for this property type starts with checking inventory records against delivery logs, then testing the tank and its pipework rather than assuming the ground around it is clean.

The local setting changes how that work is approached. The centre of Al Hzm sits at 24.5473, 46.6536, about 18.6 km from the centre of Riyadh, with an approximate radius of 1.2 km, so most properties here are a short drive from the city but still well outside its dense core. The centre of Al Hzm sits about 676 m above sea level (SRTM open elevation data), which means the site gets the full range of desert temperature swings that stress steel and coatings over time. The nearest wadi channel is about 0.8 km from the centre of Al Hzm (OpenStreetMap), so during heavy rain any leaking product can move toward low ground, and technicians should check drainage paths and surrounding soil, not only the tank itself. Where a tank's inner coating has degraded, recoating is priced at SAR 25–65 per m², and that cost is often weighed against the risk of contamination reaching groundwater or the wadi.

Before the visit, ask a few clear questions. Find out how long the tank has been in service, when it was last tested, and whether there have been recent changes in fuel use or stock levels that don't match your records. Ask whether the test will cover the tank, the fill and vent lines, and the dispenser connections, and whether the surrounding soil will be checked near the wadi side. Ask for a written summary of findings and any recommended repairs, along with the coating options and their per-square-metre rates, so you can compare choices before any work begins.

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

When do you need underground tank leak detection?

The following signs are worth checking before they grow:

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

Where the problem usually comes from

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

Tools we use in Al Hzm

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.

Quick comparison: facts and costs in Al Hzm

Questions from Al Hzm

What we advise against

• 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.