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  2. Airborne particulate radioactivity monitoring - Wikipedia

    en.wikipedia.org/wiki/Airborne_particulate...

    The countrate of the monitor varies dynamically, so that a measurement time interval must be specified. Also, these are integrating devices, meaning that some finite time is required to accumulate radioactivity onto the filter medium. The input to the monitor is, in general, a time-dependent concentration in air of the specified nuclide.

  3. Continuous emissions monitoring system - Wikipedia

    en.wikipedia.org/wiki/Continuous_emissions...

    CEMS equipment is expensive and not always affordable for a facility. In such cases, a facility will install non-EPA compliant analysis equipment at the emissions point. Once yearly, for the equipment evaluation, a mobile CEMS company measures emissions with compliant equipment. The results are then compared to the non-compliant analyzer system ...

  4. Outline of air pollution dispersion - Wikipedia

    en.wikipedia.org/wiki/Outline_of_air_pollution...

    Air pollution emission source. Types of air pollutant emission sources – named for their characteristics Sources, by shape – there are four basic shapes which an emission source may have. They are: Point source – single, identifiable source of air pollutant emissions (for example, the emissions from a combustion furnace flue gas stack ...

  5. Flue-gas stack - Wikipedia

    en.wikipedia.org/wiki/Flue-gas_stack

    A flue gas stack at GRES-2 Power Station in Ekibastuz, Kazakhstan, the tallest of its kind in the world (420 meters or 1,380 feet) [1]. A flue-gas stack, also known as a smoke stack, chimney stack or simply as a stack, is a type of chimney, a vertical pipe, channel or similar structure through which flue gases are exhausted to the outside air.

  6. Transportation Research Center - Wikipedia

    en.wikipedia.org/wiki/Transportation_Research_Center

    Both chassis dynamometers are AC motoring and meet EPA requirements for chassis based exhaust emission and Deterioration Factor Service accumulation testing. Exhaust emissions are measured using a 2013 model year AVL iGem i60 CVS dilute emissions bench. The bench is capable of measuring tailpipe exhaust emissions produced by gasoline and diesel ...

  7. Atmospheric dispersion modeling - Wikipedia

    en.wikipedia.org/wiki/Atmospheric_dispersion...

    Emissions or release parameters such as source location and height, type of source (i.e., fire, pool or vent stack) and exit velocity, exit temperature and mass flow rate or release rate. Terrain elevations at the source location and at the receptor location(s), such as nearby homes, schools, businesses and hospitals.

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  9. Portable emissions measurement system - Wikipedia

    en.wikipedia.org/wiki/Portable_emissions...

    A CATI PEMS being strapped down inside a vehicle. A portable emissions measurement system (PEMS) is a vehicle emissions testing device that is small and light enough to be carried inside or moved with a motor vehicle that is being driven during testing, rather than on the stationary rollers of a dynamometer that only simulates real-world driving.