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Any employee can enter a permit required confined space to carry out necessary repairs or maintenance
What does the acronym IDLH stand for with respect to confined spaces?
Atmospheres that contain a flammable component above what percent of its Lower Explosive Limit (LEL) are considered hazardous for confined space entry?
Entry Supervisors must verify all tests, including atmospheric testing, are conducted before entry into a PRCS is allowed.
The use of continuous forced air ventilation can be used to eliminate potential and actual atmospheric hazards.
Meters for testing LEL levels read in percentages of the LEL?
What does PEL stand for?
Short Term Exposure Limit (STEL) is usually
The Acronym TWA stand for?
NIOSH Recommend the following
In summary IDLH means
TLV is a reserved term of the American Conference of Governmental Industrial Hygienists
The National Institute of Occupational Safety and Health (NIOSH) publishes RELs (recommended exposure limits) which OSHA takes into consideration when promulgating new regulatory exposure limits.
Atmospheric Testing is performed for two purposes:
LEL Gas Monitors can detect benzene, toluene, diesel and hexane.
Most meters are calibrated to measure oxygen concentrations between:
Reliable measurements of airborne contaminants are useful for:
The atmosphere within a confined space must be tested using equipment that is designed to detect the chemicals that may be present at levels that are well below the defined exposure limits
Verification for atmosphere in the following order
Layered Atmosphere Testing?
Most atmospheric hazards in a confined space are invisible to the naked eye as well as odorless.
Gases have three characteristic properties
Ventilation of the space is determined by
Oxygen (O2) levels need to stay between 19.5% and 22%.