Lab Safety - Based On CSMLS
Guidelines Questions And Answers With
Verified Solutions Latest Updated 2024
Threshold Limit Value (TLV) - ANSWER✔✔ the concentration of a given toxic
material that generally may be tolerated without ill effects
Threshold limit value time weighted average (TLV-TWA) - ANSWER✔✔ TLV
for a regular 40-hour work week
Short Term Exposure Limit (STEL) - ANSWER✔✔ Legal limits established by
OSHA to which workers can be exposed continuously for a short period of time
without damage or injury. Exposures at the STEL should not be for more than 15
minutes and not repeated more than 4 times per work day.
TLV: Ceiling Level - ANSWER✔✔ The level of exposure that a worker should
never be exposed to
Engineering controls - ANSWER✔✔ Actions, items or equipment designed to
reduce harmful exposure
Examples of engineering controls - ANSWER✔✔ Self-sheathing needle, splash
shield, sharps container, chemical fume hoods, enclosed tube systems, etc.
Administrative Controls - ANSWER✔✔ actions taken by administrators of an
organization to reduce employee exposure to hazards
, Examples of Administrative Controls - ANSWER✔✔ orientation for new workers,
scheduling of work to avoid a overexposure, training, emergency response plans,
etc.
Personal Controls - ANSWER✔✔ Use of PPE (Personal Protective Equipment)
Heirarchy of Controls - ANSWER✔✔ Implies some types of controls are better
than others at protecting the worker. Engineering controls are considered to be
most effective, then administrative controls and personal controls are deemed to be
the "last line of defence".
Municipal Legislation includes - ANSWER✔✔ fire codes, building codes,
sanitation and waste disposal regulations, water and air emissions
Provincial Legislation includes - ANSWER✔✔ OHSA laws and regulations,
worker's compensation legislation, WHMIS regulations, environmental legislation,
sanitation and waste disposal regulations and TDG regulations (for highway)
Federal Legislation includes - ANSWER✔✔ WHMIS, TDG (for rail and seaway),
Canadian Nuclear Safety and Control Act, Canada Criminal Code, HPTA (Human
Pathogens and Toxins Act)
WHMIS stands for - ANSWER✔✔ Workplace Hazardous Materials Information
System
Three components of WHMIS - ANSWER✔✔ 1. MSDS
2. Labels
3. Training
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