The contamination of drinking water near shale gas sites has been caused by the faulty construction of wells, not the fracking process, according to a study.

Infrared images allow inspectors to detect any faulty construction, problems with ventilation, leaks, water intrusion and so on.

Rumours of faulty construction could not be proven in the subsequent legal action.

The problem was with the boat itself, either faulty engineering or faulty construction.

But faulty construction work led to the district suing the bonding company, architects and construction company.