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← Recognizing and Identifying Hazards

Hazmat Awareness · Chapter 3 · Review · Awareness track

Recognizing and Identifying Hazards

Referencing the content of hazardous materials awareness and operations at the awareness level

Correct identification drives defensive perimeters; the ERG gives first-cut isolation and protective action distances before specialist resources arrive.

Learning objectives (6)

  1. Use ERG 2024 lookup sequence — Identify material by UN/NA, name, or placard; open orange guide; apply isolation and protective action tables.

  2. Read placard hazard class — Determine primary class and subsidiary risks using DOT Chart 17 symbology.

  3. Apply initial isolation distance — Establish first-cut perimeter from ERG table before specialist modeling.

  4. Explain protective action distance — Downwind or vulnerable-area distance for shelter-in-place or evacuation decisions.

  5. Recognize WMD indicators — Multiple victims, unusual containers, or dispersal devices suggest intentional release.

  6. Use NIOSH Pocket Guide — Look up IDLH, exposure limits, and PPE guidance when chemical identity is known.

Chapter outline

  1. Engage: sensory clues and container damage
  2. Containers: cylinders, drums, cargo tanks, packages
  3. Placards, labels, subsidiary risk, UN/NA numbers
  4. ERG orange guides and green/blue tables
  5. Initial isolation and protective action distances
  6. WMD / criminal indicators at awareness depth
  7. Night and multi-product unknowns
  8. Tabletop ERG lookup from photo boards

When sources disagree (9 topics to verify before you teach from this chapter alone)

Printable study sheetPrintable study sheetRead first, then practise the track.

Showing Awareness track material. Switch tracks on the chapter page.

Vocabulary · 18

Sequences · 2

  • Recognizing and Identifying Hazards — Put these awareness-level steps in a logical order.
  • Learning objectives — Order these chapter objectives from first recognition steps toward notification and handoff.