Trench Rescue Operations MP204.09

Question 1

For the purpose of emergency response, an excavation shall be defined by ?

Answer 1

any depression, hole, trench, or earth wall, man made or natural, of 4 feet or greater.

Question 2

Trench collapses generally occur due to what ?

Answer 2

unstable soil conditions combined with improper or

inadequate shoring

Question 3

The potential for additional collapse is considered a _______ ________ to personnel.

Answer 3

primary hazard

Question 4

What type of approach should be used for trench rescue operations?

Answer 4

A phased approach
which include; Arrival, Pre-entry operations, Entry operations, and Termination, can be utilized to safely and effectively mitigate these high-risk / low-frequency events.

Question 5

First arriving company officer shall assume Command and begin an immediate size-up of the situation while ensuring that apparatus remains at least
how many feet from the location of the trench failure?

Answer 5

50 feet

Question 6

Remove all non-essential civilian personnel at least how many feet away from the collapse area?

Answer 6

150 feet

Question 7

Command shall announce that Level 1 staging should

take place at least how many feet from the trench failure?

Answer 7

150 feet

Question 8

Re-route all non-essential traffic at least ___ feet from the collapse area.

Answer 8

300 feet

Question 9

Shut down all heavy equipment operating within how many feet of the collapse area?

Answer 9

300 feet

Question 10

Place ingress and egress ladders into the trench. There should be at least 2 ladders placed into the trench no more than how many feet apart?

Answer 10

50 feet