Approached by a Melbourne consultant, SGS was engaged to map air flows through the M5 tunnel in Sydney.
One of the challenges encountered in this process, was creating a method that analysed air samples for sulphur hexafluoride down to PPT (parts per trillion) level. At the time, no Australian lab could reach the detection limits required for the study. To combat this, the project team adopted some slight modifications to a gas chromatographer so it could easily detect 10 ppb in the air samples.
This meant the client only needed to release a few litres of gas in the tunnel for its diffusion to be detected and mapped over several kilometres.
SGS is consistently striving for innovation in every field we work in. No job is too big, too small or too difficult.
About SGS
SGS is the world's leading inspection, verification, testing and certification company. We are recognised as the global benchmark for quality and integrity. With more than 89,000 employees, we operate a network of more than 2,600 offices and laboratories around the world.
