CCIL Laboratory Safety Protocols 5 — Questions and Answers
Question 1: Which document must be completed immediately following a laboratory chemical spill that results in worker exposure?
- A purchase order for replacement chemicals
- An incident or accident report form (Correct answer)
- A revised SDS for the spilled material
- A waste manifest for spill cleanup debris only
Correct answer: An incident or accident report form
Any incident involving chemical exposure to workers must be documented immediately through an incident or accident report to ensure proper follow-up and regulatory compliance.
Question 2: The hierarchy of controls in laboratory safety lists which measure as MOST effective at reducing hazard exposure?
- Personal protective equipment
- Administrative controls
- Engineering controls
- Elimination or substitution (Correct answer)
Correct answer: Elimination or substitution
Elimination or substitution of the hazard is always the most effective control because it removes the hazard entirely rather than managing exposure to it.
Question 3: In a CCIL-accredited environmental testing lab, chain of custody (COC) documentation primarily serves to:
- Track the carbon footprint of sample shipping
- Demonstrate sample integrity and traceability from collection to analysis (Correct answer)
- Record the cost allocation for each sample tested
- Authorize disposal of residual sample material
Correct answer: Demonstrate sample integrity and traceability from collection to analysis
COC documentation establishes a traceable, unbroken record of sample possession and handling, which is critical for defensible data quality.
Question 4: Which action is required before performing maintenance on a laboratory instrument that uses high-voltage electricity?
- Wear rubber-soled shoes and proceed carefully
- Perform a lockout/tagout (LOTO) procedure to de-energize the equipment (Correct answer)
- Post a warning sign and continue work quickly
- Wear insulating gloves and work with one hand
Correct answer: Perform a lockout/tagout (LOTO) procedure to de-energize the equipment
Lockout/tagout procedures must be followed to ensure equipment is de-energized and cannot be accidentally restarted during maintenance.
Question 5: What is the maximum volume of flammable liquids typically permitted outside of a flammable storage cabinet in a standard laboratory work area?
- 5 gallons per laboratory (Correct answer)
- 10 gallons per laboratory
- 25 gallons per laboratory
- 50 gallons per laboratory
Correct answer: 5 gallons per laboratory
NFPA 45 and OSHA guidelines generally limit outside-cabinet flammable liquid storage to no more than 5 gallons in a laboratory work area.
Question 6: When working with carcinogenic chemicals in a CCIL laboratory, which additional control beyond standard PPE is typically required?
- Annual medical surveillance and exposure monitoring (Correct answer)
- Daily urine testing for metabolites
- Quarterly equipment calibration audits
- Bi-weekly environmental monitoring only
Correct answer: Annual medical surveillance and exposure monitoring
Workers with potential carcinogen exposure require medical surveillance programs and documented exposure monitoring as part of a comprehensive occupational health program.
Question 7: A laboratory receives a new chemical with GHS pictogram showing an exclamation mark (!). This symbol indicates:
- Explosive or self-reactive hazard
- Acute toxicity, skin/eye irritation, or respiratory sensitization (less severe categories) (Correct answer)
- Carcinogenic or reproductive toxicity hazard
- Environmental aquatic toxicity
Correct answer: Acute toxicity, skin/eye irritation, or respiratory sensitization (less severe categories)
The GHS exclamation mark pictogram covers moderate hazards including acute toxicity (Category 4), skin sensitization, irritation, and narcotic effects.
CCIL Laboratory Safety Protocols 5
Which document must be completed immediately following a laboratory chemical spill that results in worker exposure?