Industries that make industrial emissions to air, land and water are regulated under strict international laws, to protect health and the environment. Businesses either monitor their industrial emission all the time, known as continuous monitoring, or at certain times, known as spot tests or periodic monitoring. Both need to meet strict quality requirements. Industrial emissions monitoring from chimney stacks (or stack monitoring) should only be carried out by accredited laboratories or industrial companies with certified employees. Continuous air quality monitoring means that the environment and human health is being properly protected. Portable equipment can be used to monitor pollution from industrial chimney stacks, landfill sites or leaking pipes. Soil sample analysis tells us if local soil contains potentially toxic substances, such as chemicals and/or metals. Continuous water monitoring also has to reach an acceptable standard. Again, this ensures that one of the most important precious commodities for life and health is clean and safe. Continuous emissions monitoring systems (CEMS) monitor flue gas for oxygen, carbon monoxide and carbon dioxide (CO2 emissions) to provide information for combustion control in industrial settings. Facilities employ the use of CEMS to continuously collect, record and report the required emissions data. A system might consist of a sample probe, filter, umbilical sample line, gas conditioning system, calibration gas system, and a series of gas analysers. A list of typical gases would be sulphur dioxide, nitrogen oxides, carbon monoxide, carbon dioxide, hydrogen chloride, particulate matter, mercury, volatile organic compounds, and oxygen. The emissions monitor also measure air flow, flue gas opacity and moisture.
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