ASTM E1542-10

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Designation: E1542 − 10
Standard Terminology
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Relating to Occupational Health and Safety
This standard is issued under the fixed designation E1542; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 3.2 Generic Terms and their Definitions:
3.2.1 ceiling limit—an exposure which shall not be ex-
1.1 The terms in this standard are used in the fields of
ceeded during any part of the workday. If instantaneous
occupational health and of safety. The terms are used to
monitoring is not feasible, then the ceiling limit shall be
describe the limits of exposure under different conditions, the
assessed as a 15-min time-weighted average exposure which
meanings of terms used in describing events and the types of
shallnotbeexceededatanytimeoveraworkingdayexceptfor
items measured. They will commonly be used to express the
substances which cause immediate irritation upon short expo-
effect of an event or the limit of a chemical exposure on human
sure.
beings.
3.2.2 occupational exposure limit XXXXX, “generic”—the
2. Referenced Documents
maximum time weighted average (TWA) concentration to
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which nearly all workers may be repeatedly subjected for a
2.1 ASTM Standards:
normal 8- to 10-h workday, 40-h workweek without known
E591 Practice for Safety and Health Requirements Relating
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adverse health effects.
to Occupational Exposure to Ozone (Withdrawn 1990)
E752 Practice for Safety and Health Requirements Relating
3.2.3 short-term exposure limit (STEL)—the 15-min time-
to Occupational Exposure to Carbon Disulfide (With-
weighted average exposure which shall not be exceeded at any
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drawn 1995)
time during a work day, even if the Occupational Exposure
E848 Guide for Safety and Health Requirements Relating to
Limit is not exceeded. Exposures above the Occupational
Occupational Exposure to Water-Insoluble Chromates
Exposure Limit up to the STEL should not be longer than 15
E849 Practice for Safety and Health Requirements Relating
min and should not occur more than 4 times per day. The
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to Occupational Exposure toAsbestos (Withdrawn 1991)
minimum interval between these exposures should be 60 min.
E1132 Practice for Health Requirements Relating to Occu-
3.2.3.1 Discussion—The phrase “nearly all workers” only
pational Exposure to Respirable Crystalline Silica
excludes those who are hyper-sensitive to substance exposure
E1156 Practice for Health Requirements for Occupational
or who have known medical conditions which may be aggra-
Exposure to Synthetic Amorphous Silica (Withdrawn
vated by substance exposure. Thus most workers are included
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1999)
in the group in which no adverse health effects are expected.
E2523 Terminology for Metalworking Fluids and Opera-
The phrase “a normal 8 to 10 h workday, 40-h workweek”
tions
refers to the type of work being done, that is, what is usually
done from one week to the next or one day to the next. It does
3. Terminology
not refer to length of working time as being the major
3.1 Health and safety terms specific to metalworking fluids
consideration.
and the metalworking environment are found in Terminology
The following specified periods of time must be addressed
E2523.
either by determining a value or by stating the “time” is not
addressed:
a) workday (number of hours specified)
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This terminology is under the jurisdiction of ASTM Committee E34 on
b) workweek (number of hours specified)
Occupational Health and Safetyand is the direct responsibility of Subcommittee
c) lifetime (that is, cumulative)
E34.01 on Terminology.
d) very short term maximum (for example, short-term
Current edition approved Aug. 1, 2010. Published September 2010. Originally
approved in 1993. Last previous edition approved in 2004 as E1542 - 93(2004).
exposure limit, ceiling, etc.)
DOI: 10.1520/E1542-10.
Other specified periods of time may be addressed.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
3.3 Terminology Based on Existing E34 Standards:
Standards volume information, refer to the standard’s Document Summary page on
3.3.1 occupational exposure limit to asbestos—the maxi-
the ASTM website.
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mum time weighted average (TWA) number of asbestiform
The last approved version of this historical standard is referenced on
www.astm.org. fibers to which nearly all workers may be repeatedly subjected
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E1542 − 10
over a normal day or a 40-h week and t
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