Underground tank leak detection for warehouses in Khafji

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

Before we start: what we know about Khafji

Main roads in or near Khafji: King Abdullah Road. Team note on Khafji: Kashf teams serve this city and its nearby districts with the same documented inspection standard: device-based leak detection without demolition, a written report, and a clear scope before any work begins..

Khafji is about 2 km from the sea coast (OpenStreetMap). The centre of Khafji sits about 9 m above sea level (SRTM open elevation data).

A warehouse owner in Khafji often inherits an underground tank that has been sitting quietly for years. Fuel or chemicals go in and come out through a pump, and the stock records look fine on paper. Then one month the volume figures drift, a damp patch appears near the fill point, or the water level in the tank starts to rise without explanation. By the time the problem is obvious, the owner is already facing questions about soil, groundwater and cleanup costs. Leak detection is far cheaper when it happens early, before a small loss becomes a site-wide problem.

The local geography makes this more than a routine check. The centre of Khafji sits about 9 m above sea level, and the town is about 2 km from the sea coast. That combination means the ground can be close to moisture-bearing layers, and a leak can spread through the soil in ways that are hard to predict from the surface alone. For a warehouse with a buried tank, the practical lesson is simple: do not wait for a visible sign. Monitor stock levels against deliveries every day, and treat any unexplained loss as a warning rather than a bookkeeping error. If the tank's interior has been repaired or relined, remember that tank internal coating is priced at SAR 25–60 per m², so the size of the tank drives the cost of any remedy and makes early detection worthwhile.

A sensible sequence starts with records. Pull together delivery notes, dispensing logs and the last two years of stock reconciliations, and look for any pattern of shortfall. Next, check the surface around the tank, the fill pipe, the vent and the pump sump for staining, odour or wet ground. Then arrange a tightness test or an inventory-based leak check by a qualified contractor, and ask for the results in writing. Finally, set a routine: record the water level in any monitoring well, review the stock figures weekly, and keep a written log that a future buyer or inspector could read. Doing these steps in order gives you a clear answer quickly and a defensible record if one is ever needed.

For warehouses, work is phased around operations and stored goods.

When do you need underground tank leak detection?

The following signs are worth checking before they grow:

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

Where the problem usually comes from

• 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.

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.

Facts and costs — Khafji

Short answers for Khafji

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 get after the work

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.