There are are a number of reasons that you may wish to monitor a particular environment or process.
These may be:
Compliance - to meet the requirements of legislation i.e workplace monitoring, stack monitoring
Performance monitoring- to measure the efficiency of a system. Abatement system
Calibration- Test monitoring is often performed to provide a guidance for a real time continuous monitoring eg triboelectric dust monitors
Research and Development- when developing a new abatement or fuel system
Environmental Monitoring can help you find a solution to your monitoring requirement be it:
Pipeline leak monitoring