ASTM E1718-95

Standard Guide for Administrative and Engineering Controls for Silicon Carbide Whisker Work Areas

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.  
1.4 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.

General Information

• Status: Historical
• Publication Date: 31-Dec-1994
• ICS: 13.100 - Occupational safety. Industrial hygiene
• Technical Committee: E34 - Occupational Health and Safety

Relations

• Replaced By: ASTM E1718-95(2004) - Standard Guide for Administrative and Engineering Controls for Silicon Carbide Whisker Work Areas (Withdrawn 2010)
• 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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: E 1718 – 95
Standard Guide for
Administrative and Engineering Controls for Silicon Carbide
Whisker Work Areas
This standard is issued under the fixed designation E 1718; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope 3.1.3 unbound silicon carbide whiskers and fibers—
whiskers and fibers with the potential to become airborne.
1.1 This guide applies to workplaces where unbound silicon
carbide whiskers are manufactured, processed into products, or
4. Controls for Unbound Silicon Carbide Whisker Work
otherwise used.
Areas
1.2 This guide offers guidance for controlling workplace
4.1 Application—The following controls should be fol-
exposures to airborne silicon carbide whiskers.
lowed for areas where unbound silicon carbide whiskers are
1.3 All applicable federal, state, county, and local regula-
handled outside of closed containers, or where silicon carbide
tions must be complied with when this guide is used.
whisker airborne concentrations are known or expected to be
1.4 This standard does not purport to address all of the
present in any quantity, regardless of duration.
safety concerns, if any, associated with its use. It is the
4.2 Administrative Controls:
responsibility of the user of this standard to establish appro-
4.2.1 All employees associated with a silicon carbide whis-
priate safety and health practices and determine the applica-
ker workplace should be trained in accordance with Guide
bility of regulatory limitations prior to use.
E 1717 and Practice E 1437.
2. Referenced Documents 4.2.2 Eating, drinking, or smoking are not permitted in
silicon carbide whisker work areas.
2.1 ASTM Standards:
4.2.3 Shoe cleaners, tacky mats, or other type of control for
E 1437 Practice for Handling Silicon Carbide Whiskers
materials tracked by shoes, should be provided at appropriate
E 1451 Guide for Disposal of Wastes Containing Silicon
locations to prevent introduction of unbound silicon carbide
Carbide Whiskers and Fibers
whiskers to non-work areas.
E 1716 Guide for the Selection and Use of Personal Protec-
4.2.4 Rotation of workers to reduce 8-h time weighted
tive Equipment for Humans Working with Respirable
average exposures to silicon carbide whiskers is not recom-
Silicon Carbide Whiskers
mended.
E 1717 Guide for Workplace Health and Safety Training for
2 4.3 Personal Protective Equipment—Consult Guide
Respirable Silicon Carbide Whiskers
E 1716.
3. Terminology 4.4 Engineering Controls:
4.4.1 Local exhaust controls engineered for a process are
3.1 Definitions of Terms Specific to This Standard:
preferred. General exhaust controls are acceptable, but gener-
3.1.1 respirable silicon carbide—a crystalline silicon car-
ally less effective than local exhaust. Exhaust air from central
bide material, approximately cylindrical in shape, whiskers and
collection points should be externally exhausted, filtered as
fibers with an aspect ratio equal to or greater than 5, and a
appropriate to meet applicable standards. Small self-contained
diameter less than 3.0 μm with the potential to become
units may be exhausted to the work area, if the air stream is
airborne.
first HEPA filtered before reintroduction to the work area.
3.1.2 silicon carbide whisker work area—a hood, labora-
4.4.2 Vapor capture velocity parameters are sufficient for the
tory, room, building, facility, or other defined area where
design of exhaust controls for silicon carbide whisker work
unbound silicon carbide whiskers are handled, and to which
areas or points of operations. Higher design velocities may be
potential airborne silicon carbide whiskers can be reasonably
needed if other particulate material is a health concern or
restricted.
nuisance. For additional information, consult ACGIH Indus-
trial Ventilation—A Manual of Recommended Practice.
4.5 Cleaning:
This guide is under the jurisdiction of ASTM Committee E-34 on Occupational
Health and Safety and is the direct responsibility of Subcommittee E34.70 on Single
Crystal Ceramic Whiskers.
Current edition approved Aug. 15, 1995. Published October 1995. American Conference of Government Industrial Hygienists, 6500 Glenway
Annual Book of ASTM Standards, Vol 11.03. Ave., Bldg. D-3, Cincinnati, OH 45211.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
E 1718
4.5.1 Good housekeeping should be maintained to prevent airborne respirable silicon carbide whiskers on an annual basis,
accumulations of silicon carbide whiskers. or following process changes, if more frequent.
4.5.2 C
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