ASTM E1718-95(2004)

Standard Guide for Administrative and Engineering Controls for Silicon Carbide Whisker Work Areas (Withdrawn 2010)

ABSTRACT
This guide applies to workplaces where unbound silicon carbide whiskers are manufactured, processed into products, or otherwise used; it offers guidance for controlling workplace exposures to airborne silicon carbide whiskers. The following controls should be followed for areas where unbound silicon carbide whiskers are handled outside of closed containers, or where silicon carbide whisker airborne concentrations are known or expected to be present in any quantity, regardless of duration: administrative controls, personnel protective equipment, engineering controls, cleaning, and exposure monitoring.
SCOPE
1.1 This guide applies to workplaces where unbound silicon carbide whiskers are manufactured, processed into products, or otherwise used.
1.2 This guide offers guidance for controlling workplace exposures to airborne silicon carbide whiskers.
1.3 All applicable federal, state, county, and local regulations must be complied with when this guide is used.
This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
WITHDRAWN RATIONALE
This guide applied to workplaces where unbound silicon carbide whiskers are manufactured, processed into products, or otherwise used.
Formerly under the jurisdiction of Committee E34 on Occupational Health and Safety, this guide was withdrawn in April 2010 due to its discontinued use by industry.

General Information

• Status: Withdrawn
• Publication Date: 31-Jan-2004
• Withdrawal Date: 31-Mar-2010
• Technical Committee: E34 - Occupational Health and Safety

Relations

• Replaces: ASTM E1718-95 - Standard Guide for Administrative and Engineering Controls for Silicon Carbide Whisker Work Areas
• Effective Date: 01-Feb-2004

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:E1718–95 (Reapproved 2004)
Standard Guide for
Administrative and Engineering Controls for Silicon Carbide
Whisker Work Areas
This standard is issued under the fixed designation E1718; 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 3.1.1 respirable silicon carbide—a crystalline silicon car-
bidematerial,approximatelycylindricalinshape,whiskersand
1.1 This guide applies to workplaces where unbound silicon
fibers with an aspect ratio equal to or greater than 5, and a
carbide whiskers are manufactured, processed into products, or
diameter less than 3.0 µm with the potential to become
otherwise used.
airborne.
1.2 This guide offers guidance for controlling workplace
3.1.2 silicon carbide whisker work area—a hood, labora-
exposures to airborne silicon carbide whiskers.
tory, room, building, facility, or other defined area where
1.3 All applicable federal, state, county, and local regula-
unbound silicon carbide whiskers are handled, and to which
tions must be complied with when this guide is used.
potential airborne silicon carbide whiskers can be reasonably
1.4 This standard does not purport to address all of the
restricted.
safety concerns, if any, associated with its use. It is the
3.1.3 unbound silicon carbide whiskers and fibers—
responsibility of the user of this standard to establish appro-
whiskers and fibers with the potential to become airborne.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
4. Controls for Unbound Silicon Carbide Whisker Work
Areas
2. Referenced Documents
4.1 Application—The following controls should be fol-
2.1 ASTM Standards:
lowed for areas where unbound silicon carbide whiskers are
E1437 Practice for Handling Silicon Carbide Whiskers
handled outside of closed containers, or where silicon carbide
E1451 Guide for Disposal of Wastes Containing Respirable
whisker airborne concentrations are known or expected to be
Silicon Carbide Whiskers
present in any quantity, regardless of duration.
E1716 Guide for Selection and Use of Personal Protective
4.2 Administrative Controls:
Equipment for Humans Working With Respirable Silicon
3 4.2.1 All employees associated with a silicon carbide whis-
Carbide Whiskers
ker workplace should be trained in accordance with Guide
E1717 Guide for Personnel Training for Health and Safety
E1717 and Practice E1437.
Aspects of Working in Environments Containing Respi-
4.2.2 Eating, drinking, or smoking are not permitted in
rable Silicon Carbide Whiskers
silicon carbide whisker work areas.
3. Terminology
4.2.3 Shoe cleaners, tacky mats, or other type of control for
materials tracked by shoes, should be provided at appropriate
3.1 Definitions of Terms Specific to This Standard:
locations to prevent introduction of unbound silicon carbide
whiskers to non-work areas.
4.2.4 Rotation of workers to reduce 8-h time weighted
This guide is under the jurisdiction ofASTM Committee E34 on Occupational
average exposures to silicon carbide whiskers is not recom-
Health and Safety and is the direct responsibility of Subcommittee E34.70 on Single
Crystal Ceramic Whiskers.
mended.
Current edition approved February 1, 2004. Published March 2004. Originally
4.3 Personal Protective Equipment—Consult Guide E1716.
approved in 1995. Last previous edition approved in 1995 as E1718 - 95. DOI:
4.4 Engineering Controls:
10.1520/E1718-95R04.
4.4.1 Local exhaust controls engineered for a process are
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
preferred. General exhaust controls are acceptable, but gener-
Standards volume information, refer to the standard’s Document Summary page on
ally less effective than local exhaust. Exhaust air from central
the ASTM website.
collection points should be externally exhausted, filtered as
Withdrawn. The last approved version of this historical standard is referenced
on www.astm.org. appropriate to meet applicable standards. Small self-contained
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E1718–95 (2004)
units may be exhausted to the work area, if the air stream is 5.1.2 Administrative Controls—Employees with transient,
first HEPA filtered before reintroduction to the work area. noncontactdutiesinasiliconcarbidewhiskerworkareaarenot
4.4.2 Vaporcapturevelocityparametersaresufficientforthe required to wear protective outer clothing.
design of exhaust controls for silicon carbide whisker work 5.1.3 Exposure Monitoring—A representative sample(s) of
areas or points of operations. Higher design velocities may be specific operations, general work areas, or personnel, or
needed
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