Continuous Emission Monitoring System (CEMS) refers to packaged system of gas analyzers, gas sampling system, temperature, flow and opacity monitors that are integrated with a data acquisition system, that is involved in the measurement of gases, particulates and smoke (opacity) emitted from stationary source of air pollutants and to provide a continuous record of air pollution control equipment performance and to determine compliance with emission of operation limits.     

When is the Continuous Emission Monitoring System (CEMS) being enforced?

• Section 18 of the Environmental Quality (Clean Air) Regulations 1978, the occupier of any industrial or trade premises in or on which any smoke emitting facility, including industrial plants or fuel burning equipment is situated must provide some means of facilities so that the person in charge of the premises may at all time readily ascertain without leaving the control room whether or not smoke is discharging from any chimney on such premises. Such means may include a smoke density meter indicator or alarm, installed so as to indicate adequately in the control room the density of smoke being discharged.

• EQA Act 127 Section 31(1) or EQA (clean air) Regulation 42: If so required by the Director-General, an occupier of any trade or industrial premises shall install equipment or device so as to carry out test with respect to the emissions of air impurities on such premises; and shall keep a permanent register of all such tests showing the date of each test and the results obtained. The register shall be available for inspection by the Director-General or any authorized officer at all reasonable hours .