AQS Emergency Response & Preparedness 3 — Questions and Answers
Question 1: Under EPCRA Section 304, facilities must immediately notify the LEPC and SERC when a release of an Extremely Hazardous Substance exceeds its:
- Reportable Quantity (RQ) (Correct answer)
- Threshold Planning Quantity (TPQ)
- Permissible Exposure Limit (PEL)
- Action Level (AL)
Correct answer: Reportable Quantity (RQ)
EPCRA Section 304 requires immediate notification to LEPC and SERC when a release of an EHS exceeds the substance's Reportable Quantity.
Question 2: Which meteorological condition creates the GREATEST potential for a ground-level toxic plume to persist near an emission source during a chemical emergency?
- Temperature inversion with light winds (Correct answer)
- Strong convective mixing with high winds
- Neutral atmospheric stability with moderate winds
- Pre-frontal conditions with gusty winds
Correct answer: Temperature inversion with light winds
A temperature inversion suppresses vertical mixing, trapping pollutants near ground level, especially when winds are light.
Question 3: An air quality emergency response drill that tests only internal agency procedures without notifying external partners is best classified as a:
- Tabletop exercise (Correct answer)
- Functional exercise
- Full-scale exercise
- Drill
Correct answer: Tabletop exercise
A tabletop exercise involves key personnel discussing roles and responses to a scenario without deploying resources or notifying external agencies.
Question 4: Real-time air monitoring during an industrial fire should be positioned relative to the plume in which configuration?
- Downwind at multiple distances along the plume centerline (Correct answer)
- Upwind of the source at a single fixed location
- Directly above the source at stack height
- Crosswind only at the fence line
Correct answer: Downwind at multiple distances along the plume centerline
Placing monitors downwind at multiple distances along the centerline captures concentration gradients to define the impact zone.
Question 5: The Protective Action Decision Guide (PADG) recommends evacuation over shelter-in-place when the expected outdoor exposure duration exceeds the indoor protection factor by more than:
- A factor of 2 to 3 times (Correct answer)
- A factor of 10 times
- Exactly 50%
- A factor of 5 times
Correct answer: A factor of 2 to 3 times
When the toxic load outdoors during evacuation is less than 2–3 times the indoor infiltration dose, evacuation may be preferable to prolonged shelter-in-place.
Question 6: Which type of air sampling media is MOST appropriate for quickly collecting volatile organic compounds during an accidental chemical release in the field?
- Evacuated stainless steel canisters (SUMMA or equivalent) (Correct answer)
- High-volume PM10 filters
- Denuder tubes for semi-volatile organics
- Impingers with sodium hydroxide solution
Correct answer: Evacuated stainless steel canisters (SUMMA or equivalent)
Evacuated canisters capture whole-air samples of VOCs without sorbent breakthrough and are ideal for rapid field collection during emergencies.
Question 7: OSHA's HAZWOPER standard (29 CFR 1910.120) requires that employees at the highest level of hazardous materials response receive a minimum of how many initial training hours?
- 40 hours (Correct answer)
- 8 hours
- 24 hours
- 16 hours
Correct answer: 40 hours
Hazmat technicians and on-scene incident commanders require 40-hour initial HAZWOPER training under 29 CFR 1910.120(e).
AQS Emergency Response & Preparedness 3
Under EPCRA Section 304, facilities must immediately notify the LEPC and SERC when a release of an Extremely Hazardous Substance exceeds its: