Air Test inspection

SFA-Testsystemen has developed a unique air test method for checking your liquid-tight pavement. The SFA Air Test method can be used to determine the exact condition of your liquid-tight pavement in a simple, accurate and objective manner.

SFA-Testsystemen is the only inspection agency that looks beyond the surface of your liquid-tight pavement alone. We assess the complet structure of a liquid-tight pavement without disturbing the surroundings using our internally developed SFA Air Test System. The SFA Air Test System provides a reliable and objective insight into the condition of the liquid-tight pavement.

SFA-Testsystemen has been separately accredited by the Dutch Accreditation Council to conduct on-site air test inspections for impermeable containment systems or forecourt surfaces.

Air test system protocol

In order to carry out the air test, the system must be set up in the liquid-tight pavement according to a previously made design. This is possible in both existing and new liquid-tight pavements. A mobile air test system is used on the testing points to create a controlled excess pressure under the liquid-tight pavement. A biologically degradable water and foam solution is applied on the top of the liquid-tight pavement

Imperfections found in parts of the liquid-tight pavement that run through the entire floor structure are easily traced as they create air bubbles. It is only then that these imperfections are identified as defects. It is vital that places where surface imperfections are found in the liquid-tight pavement, for which no air leakage is established, are not identified as defects.

The SFA Air Test assesses the entire liquid-tight pavement, which is generally around 20 centimetres thick. The chance of the entire structure meeting the criteria for impermeability is obviously many times bigger than that for the visible surface. The SFA Air Test is an objective inspection in which the result does not depend on the interpretation of the inspector, but is determined by the system. Only actual defects are identified as defects. No test failure for your liquid-tight pavement in doubtful cases or uncertainty and no unnecessary repairs to your liquid-tight pavement.

Our inspectors flag, register and report these defects. You can use this report to have your pavement repaired very specifically.

After completion of the SFA Air Test inspection, the test points are professionally sealed using a specially designed SFA Sealant. The sealants are supplied in various types and material choice is based on the characteristics of the liquids that the liquid-tight pavement is expected to handle. The sealants can be applied at an appropriate depth so that they do not form any obstacles for internal company transport, such as fork-lift trucks.

The SFA Air Test system can be used both indoors and outdoors on all kinds of liquid-tight pavement, such as in situ concrete, impermeable asphalt and impermeable forecourt surfaces or containment systems with a plastic or ceramic overlay.

Air test: the alternative method

A liquid-tight pavement can be assessed using the SFA Air Test inspection. This method can be used instead of the visual inspection. The owner/user of an impermeable containment system or forecourt surface can make savings on inspection costs by directly using the SFA Air Test method. The visual aspect is limited to establishing the objective measurement results. As a result of the executed SFA Air Test inspection, an Impermeable Facility Certificate can also be issued.

SFA-Testsystemen Consultants will define what is the best and financially most attractive solution for your liquid-tight pavement.

The SFA Air Test method has been applied on a large scale on petrol stations and in the chemical and petrochemical industry both domestically and internationally. Significant positive results have appeared with our customers from our experience ranging over several years. Besides the fact that there is a positive feeling due to the system’s objectivity with users of watertight containment systems or surfaces, lots of proven savings on repairs/maintenance of liquid-tight pavements have also been achieved.