Final Test – Atmospheric Testing

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%.