Glossary

AIHA American Industrial Hygiene Association
ACGIH American Conference of Industrial Hygienists
Ceiling Concentration limit for airborne substances that should never be exceeded for any time period.
EPA Environmental Protection Agency (USA)
ERPG Emergency Response Planning Guideline (AIHA)
ERPG-1 The maximum airborne concentration below which it is believed that nearly all individuals could be exposed for up to 1 hour without experiencing other than mild transient adverse health effects or perceiving a clearly defined, objectionable odour (AIHA).
ERPG-2 The maximum airborne concentration below which it is believed that nearly all individuals could be exposed for up to 1 hour without experiencing or developing irreversible or other serious health effects or symptoms which could impair an individual's ability to take protective action (AIHA).
ERPG-3 The maximum airborne concentration below which it is believed that nearly all individuals could be exposed for up to 1 hour without experiencing or developing life-threatening health effects (AIHA).
MEL Maximum exposure limit
NAAQS National Ambient Air Quality Standards (USA)
NIOSH National Institute for Occupational Safety and Health at the Centers for Disease Control and Prevention (USA)
OEL Occupational exposure limit
OSHA US Department of Labor Occupational Safety and Health Administration
Primary Primary standards set limits to protect public health, including the health of "sensitive" populations such as asthmatics, children, and the elderly.
PM Particulate matter. Generally designated by size, with particles with a mean aerodynamic diameter 2.5-10 microns referred to as coarse particles, and those < 2.5 (PM2.5) microns in diameter referred to as fine particles.
PEL Permissible exposure limit
REL Recommended exposure limit
Secondary Secondary standards set limits to protect public welfare, including protection against decreased visibility, damage to animals, crops, vegetation, and buildings.
STEL Short term exposure limit, generally 15 minute time-weighted average that should not be exceeded at any time during a workday.
TWA Time weighted average
 
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PAMPHLETS

Download our pamphlets on preparing for ashfall and on the health hazards of ash. They are designed for mass distribution at the onset of new eruptions. They are now avaiable in English, Japanese, French Spanish, Portuguese, Swahili, Indonesian and Icelandic with Italian versions being available shortly. Please see our Pamphlets page for further infomation.

 

  

 

FACE MASK USE

IVHHN has an article under the Guidelines tab which used to be called 'Recommended Face Masks'. This has now been updated to 'Information on face masks' and is an interim page whilst the Health Interventions in Volcanic Eruptions project investigates which types of respiratory protection are effective in protecting the general population from volcanic ash inhalation. Please note that the translations in Spanish, Japanese and Portuguese have not yet been updated.

 

 

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