Written Exposure Control Plan Template Page 6
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16OVERVIEW
Written Exposure
Control Plan
OSHA §1926.1153
4. HEALTH HAZARDS FROM SILICA
d. Employee responsibilities
EXPOSURE
Employees are responsible for understanding the
ECP, the Rule and applicable Safety Data Sheets,
Silica is quartz, and the less common cristobalite and
and where they can be located; and fully and
tridymite. Silica (quartz) is present in many common
properly implementing all Control requirements as
construction materials, including concrete, mortar, block,
contained in this ECP. Employees shall immediately
brick, stone, and asphalt. Airborne dust is created when
notify their supervisor and/or the Competent Person
these materials are disturbed, such as by cutting, coring,
if they have reason to believe excess Silica exposure
drilling, demolishing, or grinding. A portion of this dust is
is occurring, or experience signs or symptoms of
“respirable” (≤10 microns in size — very fine particles which
silica-related illness.
can reach the lungs); and a portion of this respirable dust
is silica. The silica content of dust varies by material and
geography.
Prolonged overexposure to Silica can result in health-related
injury, including silicosis, cancer, tuberculosis, chronic
bronchitis, and immune system and kidney effects. The
Rule has established exposure limits intended to protect
employees from these effects. These limits include an Action
Level (“AL”) of 25 µg/m3 as an 8-hour Time Weighted Average
(“TWA”), and a Permissible Exposure Limit (“PEL”) of 50 µg/
m3 as an 8-hour TWA.
Hilti, Inc. (U.S.) 1-800-879-8000
en español 1-800-879-5000
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