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Ventilation contaminants

Mask Hood worn connect ventilated contaminated. [Pg.106]

Caution. The finished compound is inert under ordinary conditions. There have been reports of polymer fume fever, the symptoms of which resemble those of an attack of influenza, in humans exposed to the heated polymer under conditions of inadequate ventilation. Contamination of smoking tobacco with polytetrafluoroethylene, even in small amounts, is to be avoided. [Pg.1208]

In the examples given above, the exposure route is direct and easily quantifiable, but what if, on the other hand, the exposure is indirect Indirect exposures would include the exposure that results when a fish ventilates contaminated water across its gills, or a person inhales secondhand smoke into their lungs. In these cases, the quantitative dose of the chemical exposure is much less certain, and much more difficult to measure. Rather than determining the exposure... [Pg.2]

The following cautions should be observed Do not destroy or remove inhibitor. Do not contaminate with alkaline or strongly acidic materials. Do not store in the presence of a water layer. In the event of spillage or misuse that cause a release of product vapor to the atmosphere, thoroughly ventilate the area, especially near floor levels where vapors will collect. [Pg.129]

Air contaminants are emitted to the indoor air from a wide variety of activities and consumer products, some of which are summarized in Table 11. Most indoor activities produce some types of pollutants. When using volatile products or engaging in the activities Hsted, care should be exercised to minimize exposure through proper use of the product and by providing adequate ventilation. [Pg.382]

Transportation. Ammonium nitrate is safely transported by rad, road, and water. However, its transportation on U.S. navigable waterways is restricted. Good ventilation must be provided and precautions taken against leakage and contamination. The material must be completely isolated from other cargo and must be kept free of extraneous combustible materials. [Pg.220]

Appropriate protective clothing and equipment should be worn to minimize exposure to methacrylate liquids and vapors. Chemically resistant clothes and gloves and splash-proof safety goggles ate recommended. The working area should be adequately ventilated to limit vapors. Should chemical exposure occur, contaminated clothing should be removed and the affected area washed with copious amounts of water. Medical attention should be sought if symptoms appear. Eurther information about methyl methacrylate and other methacrylates is available (141). [Pg.255]

Prevention of carbon monoxide poisoning is best accompHshed by providing good ventilation where contamination is a problem. If good ventilation is not possible, a self-contained breathing apparatus, such as a Scott Air-Pak, must be used. The use of gas masks containing an adsorbent is generally not recommended since it is difficult to know when the adsorbent is exhausted. [Pg.59]

Personnel who must work in areas in which tritium contamination exceeds permitted levels are safeguarded by protective clothing, such as ventilated plastic suits. Detailed descriptions of laboratories suitable for manipulation of tritium can be found in Reference 9. [Pg.16]

In industrial air-conditioning systems, harmful environmental gases, vapors, dusts, and fumes are often encountered. These contaminants can be controlled by exhaust systems at the source, by dilution ventilation, or by a combination of the two methods. When exhaust... [Pg.1104]

High-efficiency air filters are sometimes used for emission control when particulate contaminants are low in concentration but present special hazards cleaning of ventilation air and other gas streams exhausted from nuclear ant operations is an example. [Pg.1606]

For hazardous areas flameproof enclosures alone are recommended, except in areas with moderate intensity of contamination and where such assemblies are located away from the affected area and in a separate well-ventilated room, when pressurized enclosures may also be. safe. The reason for this precaution is that frequent arcing takes place within the enclosure on each switching of a contactor, switch, breaker or an OCR etc. and also during operation of power and auxiliary contactors. [Pg.362]

Since it is not practical to manufacture a llameproof enclosure due to its size and bulk and the number of knockouts and openings on the doors for switches, metering, indicators, and pushbuttons (PBs) etc., it is common practice to locate the.se assemblies some distance from the affected area in a separate well-ventilated room. Depending upon the location and intensity ol contamination, it may be permissible to meet the requirement by using a pressurized enclosure by maintaining a positive pressure inside the enclosure similar to that for motors (Section 7.1.3..3). When there arc many switchgear assemblies, the room itself can be pressurized, which is safer and easier. Small enclosures, however, such as a PB station, switch or a switch fuse unit or an individual starter unit etc., which can be easily made of MS plates or cast iron, as discussed in Section 7.13, can be mounted in the hazardous area while the main MCC can be installed in the control room, away from the contaminated area and from where the process can be monitored. [Pg.363]

The air inside a factory building can be polluted by release of contaminants from industrial processes to the air of the workroom. This is a major cause of occupational disease. Prevention and control of such contamination are part of the practice of industrial hygiene. To prevent exposure of workers to such contamination, industrial hygienists use industrial ventilation systems that remove the contaminated air from the workroom and discharge it, either with or without treatment to remove the contaminants, to the ambient air outside the factory building. [Pg.40]

Biological agents—molds, spores, dander Contaminated ventilation systems, pets... [Pg.385]

Skin proteetion may neeessitate use of full proteetive suits. When eatalysts are dumped from reaetors at the end of a proeess they may prove to be extremely dusty as a result of reduetion in partiele size during the reaetion proeess. Again, depending upon the nature of the hazard, ventilation, personal proteetion, and use of temporary enelosures to prevent contamination of the general work area should be considered. Some catalysts are pyrophoric and some catalyst beds are inerted with the added possibility of fire, or release of inerting gas into the workplace which may cause asphyxiation. [Pg.119]

Control exposures by engineering techniques, e.g. containment, shielding, ventilation (consider need for in-duct filters to remove contamination prior to exhausting to atmosphere), backed up by systems of work and personal protection including approved respirators where necessary. [Pg.394]

In recent years, the use of solvent-borne adhesives has been seriously restricted. Solvents are, in general, volatile, flammable and toxic. Further, solvent may react with other airborne contaminants contributing to smog formation and workplace exposure. These arguments have limited the use of solvent-bome adhesives by different national and European regulations. Although solvent recovery systems and afterburners can be effectively attached to ventilation equipment, many factories are switching to the use of water-borne rubber adhesives, hot melts or 100% solids reactive systems, often at the expense of product performance or labour efficiency. [Pg.577]

If the hypothesis or model does not seem to be a good predictor of what is happening in the building, you probably need to collect more information about the occupants, HVAC system, pollutant pathways, or contaminant sources. Under some circumstances, detailed or sophisticated measurements of pollutant concentrations or ventilation quantities may be required. Outside assistance may be needed if repeated efforts fail to produce a successful hypothesis or if the information required calls for instruments and procedures that are not available in-house. Analysis of the information collected during the LAQ investigation could produce any of the following results ... [Pg.214]

Remove or reduce the source Prohibit smoking indoors or limit smoking to areas from which air is exhausted, not recirculated (NIOSH regards smoking areas as an interim solution). Relocate contaminant-producing equipment to an unoccupied, better ventilated, or exhaust-only ventilated space. Select products which produce fewer or less potent contaminants while maintaining adequate safety and efficiency. Modify other occupant activities. [Pg.228]

Ventilation modification is often used to correct or prevent indoor air quality problems. This approach can be effective either where buildings are underventilated or where a specific contaminant source cannot be identified. Ventilation can be used to control indoor air contaminants by ... [Pg.229]


See other pages where Ventilation contaminants is mentioned: [Pg.612]    [Pg.360]    [Pg.382]    [Pg.67]    [Pg.362]    [Pg.106]    [Pg.229]    [Pg.116]    [Pg.241]    [Pg.96]    [Pg.99]    [Pg.451]    [Pg.439]    [Pg.287]    [Pg.336]    [Pg.535]    [Pg.474]    [Pg.484]    [Pg.487]    [Pg.496]    [Pg.1104]    [Pg.229]    [Pg.390]    [Pg.394]    [Pg.261]    [Pg.371]    [Pg.429]    [Pg.218]    [Pg.227]    [Pg.228]   


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Airborne contamination ventilation

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