Driven by a strong sustainability agenda, Air Liquide wanted to increase energy efficiency and reduce its carbon footprint by tackling costly leaks of air and nitrogen at its dual mixed refrigerant (DMR) refinery in Syracuse, Sicily. The company chose to carry out measurements every two years on all pipelines around the refinery – 7,000m for compressed air and 9,435m for nitrogen – as well as 5km of interconnecting pipelines. Leak detection and repair (LDAR) checks are also required every 12 months by Italy's environmental regulator ISPRA.