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8. EXPOSURE CONTROLS/PERSONAL PROTECTION
EXPOSURE GUIDELINES
COMPONENTS OSHA PEL MANUFACTURER REG
Refractories, Fibers,
Aluminosilicate None Established* 0.5 f/cc, 8-hr. TWA**
* There is no specific regulatory standard for RCF in the U.S. OSHA’s “Particulate Not Otherwise
Regulated (PNOR)” standard [29 CFR 1910.1000, Subpart Z, Air Contaminants] applies
generally; Total Dust 15 mg/m
³
; Respirable Fraction 5 mg/m
³
.
** The Refractory Ceramic Fibers Coalition (RCFC) has sponsored comprehensive toxicology and
epidemiology studies to identify potential RCF-related health effects [see Section 11 for more
details], consulted experts familiar with fiber and particle science, conducted a thorough review of
the RCF-related scientific literature, and further evaluated the data in a state-of-the-art
quantitative risk assessment. Based on these efforts and in the absence of an OSHA PEL, RCFC
has adopted a recommended exposure guideline, as measured under NIOSH Method 7400 B.
The manufacturers’ REG is intended to promote occupational health and safety through prudent
exposure control and reduction and it reflects relative technical and economic feasibility as
determined by extensive industrial hygiene monitoring efforts undertaken pursuant to an
agreement with the U.S. Environmental Protection Agency.
OTHER OCCUPATIONAL EXPOSURE LEVELS (OEL)
RCF-related occupational exposure limits vary internationally. Regulatory OEL examples include:
Australia – 0.5 f/cc; Austria – 0.5 f/cc; Canada – 0.5 to 1.0 f/cc; Denmark – 1.0 f/cc; France – 0.6
f/cc; Germany – 0.5 f/cc; Netherlands – 1.0 f/cc; New Zealand – 1.0 f/cc; Norway – 2.0 f/cc;
Poland – 2.0 f/cc; Sweden – 1.0 f/cc; United Kingdom – 2.0 f/cc. Non-regulatory OEL examples
include: ACGIH TLV 0.2 f/cc; RCFC REG 0.5 f/cc. The objectives and criteria underlying each of
these OEL decisions also vary. The evaluation of occupational exposure limits and determining
their relative applicability to the workplace is best performed, on a case-by-case basis, by a
qualified Industrial Hygienist.
ENGINEERING CONTROLS
Use engineering controls such as local exhaust ventilation, point of generation dust collection,
down draft work stations, emission controlling tool designs, and materials handling equipment
designed to minimize airborne fiber emissions.
PERSONAL PROTECTION EQUIPMENT
Respiratory Protection – RCF:
When engineering and/or administrative controls are insufficient to maintain workplace
concentrations within the 0.5 f/cc REG, the use of appropriate respiratory protection, pursuant to
the requirements of OSHA Standards 29 CFR 1910.134 and 29 CFR 1926.103, is recommended.
The following information is provided as an example of appropriate respiratory protection for
aluminosilicate fibers. The evaluation of workplace hazards and the identification of appropriate
respiratory protection is best performed, on a case by case basis, by a qualified Industrial
Hygienist.