What is Silica?
The dangerous form of silica that can scar the lungs is called ________ silica.
Crystalline
3 different types of silicosis include: ______, ______, ______
Chronic, accelerated, acute
Mandatory limit set by OSHA on the amount of a substance a worker can be exposed to.
Permissible Exposure Limit (PEL)
HEPA Machines remove ______% of airborne particulates at ______ microns or larger in diameter.
99.97%
0.3 microns
The _____ _____ will implement the exposure control plan on-site.
Competent Person
List 5 products that contain respirable crystalline silica.
Concrete, brick, glass bead, fiber cement board, etc.
5 illnesses known to be caused by over-exposure to silica.
Silicosis, lung cancer, COPD, kidney disease, Auto immune disease - Rheumatoid Arthritis, Lupus
Highest recommended amount of a chemical to which a worker should be exposed to, set by NIOSH.
This level is often more restrictive than OSHA's limits.
Recommended Exposure Limit (REL)
The 5 components of the Hierarchy of Controls
Elimination, Substitution, Engineering Controls, Administrative Controls, PPE
_____ must be worn whenever engineering and work practice controls cannot lower the worker's exposure below the PEL and whenever specified in Table 1.
Respirators
Airborne silica ranges in size from ____ to ___ microns.
0.1-25 microns
_____ silicosis is the result of prolonged inhalation of excessive levels of respirable silica dust. This develops 10-30 years after exposure
Chronic
A technical bulletin that provides detailed health and safety information about a product or chemical in a standardized format.
***DAILY DOUBLE***
Safety Data Sheets (SDS)
3 examples of Engineering Controls to prevent over exposure to respirable silica.
Wetting materials, ventilation, dust collection equipment, HEPA vacuums, etc...
_____ _____ is required for employees who will be required to wear a respirator for 30 or more days in a year.
***DAILY DOUBLE***
Medical Surveillance
Incident that brought national attention, in the US, to Silicosis in the 1930's.
Hawk's Nest Tunnel disaster
Exposure to respirable silica can occur through two types of exposure, ______ and ______.
Direct and indirect
The worker's average airborne exposure to a substance in any 8-hour workday. It describes the DURATION of exposure.
Time-Weighted Average (TWA)
3 examples of Work Practice Controls to prevent over exposure to respirable silica.
Engineering controls, operating & maintaining tools in accordance to manufacturers' specifications, restricting access to the area, wearing respiratory protection and other PP, disposing of dust in a safe manner, washing hands, etc.
3 reasons why respirators are considered the last line of defense.
***DAILY DOUBLE***
1. Must be worn correctly/continuously
2. Must fit properly
3. Must be worn by EVERY individual worker exposed
List 5 ways that silica can be made respirable.
Dry sawing/cutting/chipping, blasting, demo, dry sweeping, jackhammering, pouring/mixing dry powders containing silica, etc...
A 2013 research survey found that, of all UBC members, __________ may be at highest risk of silica exposure due to the amount of time spent working in direct contact with cured concrete.
Floor coverers
Time-Weighted Average is calculated by dividing the _______ by _______.
Amount of exposure, 8 hours
For an exposure assessment, an employer can monitor exposure by using a personal sampling device or utilize _____ _____, provided by OSHA.
Table 1
The _____ _____ _____ is used to protect the workers by determining the methods that will be used to control exposures in advance and communicating that info to employees if Table 1 is not applicable.
Exposure Control Plan