ERG practice scenarios, graded step by step

One scenario, start to finish

A placard with the POISON GAS design and an orange panel reading 1017, a cylinder leaking slowly, at night. Here is the lookup the drill grades:

1. Class. The bottom corner of the placard reads 2 and the word is POISON GAS: Division 2.3, toxic gases.
2. Guide. In the yellow section, page 29, 1017 is Chlorine, Guide 124, and the row is highlighted in green.
3. Distance. Green sends you to Table 1. Table 1, small spill: isolate 60 m in all directions, then protect 1.5 km downwind at night.
4. First actions. From Guide 124: keep people upwind and out of low areas, keep combustibles away, and fight any fire with water only.

The common miss is reading the wrong column. Type the day figure for a night scenario and the drill says so: "Protect: night gives 1.5 km; you wrote 0.3. That is the day column."

And when the ID number is on the vehicle, the placard table is the wrong tool. A class 3 placard would send you to Guide 127, but 1203 is Gasoline, Guide 128. The drill names that trap: "127 is the placard table's guide for this placard. With an ID number, use the yellow index instead: 1203 is Guide 128."

Training aid only. In a real incident follow the current printed guidebook and your employer's emergency plan.

Where the numbers come from

Every guide number, highlight, distance and page is typed in from the public 2024 Emergency Response Guidebook and checked twice: the yellow index against the blue index row for row, and each Table 1 row against the book's own text. Every graded step cites the page, so a trainee can open the printed book and see the same line. Placardset is a training aid; in a real incident follow the current printed guidebook and your employer's plan.

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