1、Designation: E1542 10Standard TerminologyRelating to Occupational Health and Safety1This standard is issued under the fixed designation E1542; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in p
2、arentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 The terms in this standard are used in the fields ofoccupational health and of safety. The terms are used todescribe the limits of exposure under
3、different conditions, themeanings of terms used in describing events and the types ofitems measured. They will commonly be used to express theeffect of an event or the limit of a chemical exposure on humanbeings.2. Referenced Documents2.1 ASTM Standards:2E591 Practice for Safety and Health Requireme
4、nts Relatingto Occupational Exposure to Ozone3E752 Practice for Safety and Health Requirements Relatingto Occupational Exposure to Carbon Disulfide3E848 Guide for Safety and Health Requirements Relating toOccupational Exposure to Water-Insoluble ChromatesE849 Practice for Safety and Health Requireme
5、nts Relatingto Occupational Exposure to Asbestos3E1132 Practice for Health Requirements Relating to Occu-pational Exposure to Respirable Crystalline SilicaE1156 Practice for Health Requirements for OccupationalExposure to Synthetic Amorphous SilicaE2523 Terminology for Metalworking Fluids and Opera-
6、tions3. Terminology3.1 Health and safety terms specific to metalworking fluidsand the metalworking environment are found in TerminologyE2523.3.2 Generic Terms and their Definitions:3.2.1 ceiling limitan exposure which shall not be ex-ceeded during any part of the workday. If instantaneousmonitoring
7、is not feasible, then the ceiling limit shall beassessed as a 15-min time-weighted average exposure whichshall not be exceeded at any time over a working day except forsubstances which cause immediate irritation upon short expo-sure.3.2.2 occupational exposure limit XXXXX, “generic”themaximum time w
8、eighted average (TWA) concentration towhich nearly all workers may be repeatedly subjected for anormal 8- to 10-h workday, 40-h workweek without knownadverse health effects.3.2.3 short-term exposure limit (STEL)the 15-min time-weighted average exposure which shall not be exceeded at anytime during a
9、 work day, even if the Occupational ExposureLimit is not exceeded. Exposures above the OccupationalExposure Limit up to the STEL should not be longer than 15min and should not occur more than 4 times per day. Theminimum interval between these exposures should be 60 min.3.2.3.1 DiscussionThe phrase “
10、nearly all workers” onlyexcludes those who are hyper-sensitive to substance exposureor who have known medical conditions which may be aggra-vated by substance exposure. Thus most workers are includedin the group in which no adverse health effects are expected.The phrase “a normal 8 to 10 h workday,
11、40-h workweek”refers to the type of work being done, that is, what is usuallydone from one week to the next or one day to the next. It doesnot refer to length of working time as being the majorconsideration.The following specified periods of time must be addressedeither by determining a value or by
12、stating the “time” is notaddressed:a) workday (number of hours specified)b) workweek (number of hours specified)c) lifetime (that is, cumulative)d) very short term maximum (for example, short-termexposure limit, ceiling, etc.)Other specified periods of time may be addressed.3.3 Terminology Based on
13、Existing E34 Standards:3.3.1 occupational exposure limit to asbestosthe maxi-mum time weighted average (TWA) number of asbestiformfibers to which nearly all workers may be repeatedly subjectedover a normal day or a 40-h week and the peak number ofasbestiform fibers to which an individual may be subj
14、ectedduring 15 min or less, without known adverse health effects.Lifetime exposure is based on 99 % probability of protecting1This terminology is under the jurisdiction of ASTM Committee E34 onOccupational Health and Safety and is the direct responsibility of SubcommitteeE34.01 on Terminology.Curren
15、t edition approved Aug. 1, 2010. Published September 2010. Originallyapproved in 1993. Last previous edition approved in 2004 as E1542 - 93(2004).DOI: 10.1520/E1542-10.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual
16、 Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Withdrawn1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.all workers from acquiring clinically significant disease for aworki
17、ng life of 50 years. E8493.3.2 occupational exposure limit to carbon disulfidethemaximum time weighted average (TWA) of carbon disulfide towhich nearly all workers may be repeatedly subjected over anormal 8-h day or a 40-h week, the ceiling concentration ofcarbon disulfide or the maximum peak above
18、ceiling concen-tration of carbon disulfide that cannot be exceeded, withoutknown adverse health effects. Lifetime exposure is undefined.E7523.3.3 occupational exposure limit to ozonethe maximumtime weighted average (TWA) of ozone to which nearly allworkers may be repeatedly subjected over a normal 8
19、-h day ora 40-h week or the ceiling limit of ozone that cannot beexceeded, without known adverse health effects. Lifetimeexposure is undefined. E5913.3.4 occupational exposure limit to quartz dustthe maxi-mum time weighted average (TWA) concentration of respirablequartz particles to which nearly all
20、 workers may be repeatedlysubjected over a normal 10-h day or a 40-h week withoutknown adverse health effects. Ceiling and lifetime exposuresare undefined. E11323.3.5 occupational exposure limit to synthetic amorphoussilicathe maximum time weighted average (TWA) concen-tration of respirable syntheti
21、c amorphous silica to which nearlyall workers may be repeatedly subjected over a normal 8-h dayor a 40-h week without known adverse health effects. Ceilingand lifetime exposures are undefined. E11563.3.6 occupational exposure limit to water-insolublechromatesthe maximum time weighted average (TWA) c
22、on-centration of water-insoluble chromates as chromium to whichnearly all workers may be repeatedly subjected over a normal8-h day or a 40-h week without known adverse health effects.Ceiling and lifetime exposures are undefined. E8484. BibliographyCode of Federal Regulations (CFR)29 CFR 1910.1000(US
23、) Threshold Limit Values and Biological ExposureIndicesAmerican Conference of Governmental IndustrialHygienistsThis standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comment
24、s are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not
25、 received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copi
26、es) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).E1542 102
