High efficiency particulate air

Beryllium oxides Baghouses or high-efficiency particulate air (HEPA) filters... 

The purpose of open unidirectional airflow benches is to protect products from particulate contaminants by creating a controlled environment. These benches are used, for example, in electronic, biological, pharmaceutical, and food industries. It should be mentioned that within pharmaceutical production, aseptic sterile processes must be carried out in a Class 100 environment (U.S. Federal Standard 209 E, Airborne Particulate Cleanliness Classes in Cleanrooms and Clean Zones). To avoid particle contamination in the bench, horizontal or vertical airflow with high-efficiency particulate air (HEPA)-filtered air is used. The air velocity is normally 0.4-0.5 ra s". Some examples of typical arrangements of open unidirectional airflow benches are shown in Fig. 10.51. 

Air filter A device that removes particulate matter from a gas flowing through it. These are classified as Absolute A high-efficiency particulate air filter that is at least 99.79% efficient in the removal of thermally generated mOnodisperse dioctylphthalate smoke particles with a diameter of 0.3 pm, also known as a HEPA filter. 

HEPA A high-efficiency particulate air filter designed to deal with particles below 1 pm with efficiencies... 

HEPA (high-efficiency particulate air) filters Also known as absolute filters, the large collection filter surface area provides a high collection efficiency for particulate matter. 

HEPA HVAC high-efficiency particulate air heating, ventilation, and air conditioning... 

Small areas Small puddles of liquid can be contained by covering with absorbent material such as vermiculite, diatomaceous earth, clay, sponges, or towels. Place the absorbed material into containers lined with high-density polyethylene. Larger puddles can be collected using vacuum equipment made of materials inert to the released material and equipped with a high-efficiency particulate air (HEPA) filter and appropriate vapor filters. Wash the area with copious amounts of soap and water. Collect and containerize the rinseate. Ventilate the area to remove vapors. 

A number of conditions must be considered when selecting protective equipment for individuals at the scene of a release. For instances such as "anthrax" letters when the mechanism of release is known and it does not involve an aerosol generating device, then responders can use Level C with high-efficiency particulate air (HEPA) filters. 

High-efficiency particulate air filters can remove lightweight particles such as pollens, mold spores, and cat allergen, thereby reducing allergic respiratory symptoms. 

Responders may use full facepiece respirator with a P100 filter or powered air-purifying respirator (PAPR) with high efficiency particulate air (HEPA) filters when it can be determined that ... 

Filter A High-Efficiency Particulate Air (HEPA) filter is at least 99.97 percent efficient in removing particles with a diameter of 0.3 microns. 

Airborne precautions using correct ventilation including negative air-pressure rooms with high-efficiency particulate air filtration should be initiated for hospitalized confirmed or suspected smallpox patients, unless the entire facility has been restricted to smallpox patients and recently vaccinated persons. 

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