Ambient Industrial hygienists

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. 

How does the range of concentrations of air pollutants of concern to the industrial hygienist differ from that of concern to the air pollution specialist To what extent are air sampling and analytical methods in factories and in the ambient air the same or different ... 

AAC = acceptable ambient concentration ACGIH = American Conference of Governmental Industrial Hygienists ADEQ = Arizona Department of Environmental Quality SNA = Bureau of National Affairs CDC = Center for Disease Control CERCLA = Comprehensive Environmental Response, Compensation, and Liability Act CFR = Code of Federal Regulations DNR = Department of Natural Resources DWEL = drinking water equivalent level ... 

American Conference of Govermnental Industrial Hygienists, have established exposure limits for some substances and some exposures (e.g., workplace or ambient air quality), these limits are not easily or directly translated into emergency exposure limits for exposures at high levels but of short duration, usually less than 1 hr, and only once in a lifetime for the general population, which includes infants, children, the elderly, and persons with diseases, such as asthma, heart disease, or lung disease. 

The USEPA standards for 24-h PM, and PM2.5 concentrations in ambient environments are 150 and 65 pg/m , respectively. Indeed in some settings the levels exceed what is considered acceptable for even occupational exposures. The threshold limit value adopted by the American Conference of Governmental Industrial Hygienists for respirable dusts is 5,000 pg/m and for carbon monoxide is 29 mg/m The comparison with these health-based standards (although currently available for settings other than indoor household environments) indicates the potential for significant health risks. 

U.S. National Institute for Occupational Safety and Health (NIOSH) is 35 ppm with a ceiling value of 200 ppm. The U.S. Environmental Protection Agency (EPA) has set an ambient air quality standard of 9 ppm, averaged over an 8-h period, and 35 ppm for 1 h, not to be exceeded more than once a year. The American Conference of Governmental and Industrial Hygienists (ACGIH) has set a threshold limit value for CO of 25 ppm. ... 

AAC = acceptable ambient concentrations ACGIH = American Conference of Governmental Industrial Hygienists BEI = biological exposure index BNA = Bureau of National Affairs CDC = Center for Disease Control ... 

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