OP 4530 Trench Rescue Flashcards
Types of Soil
Compact
Running
Saturated
Competent Person requirements and responsibilities
Shall continuously monitor trench.
Training, Knowledge and experience.
Ability to detect conditions, failures, hazards, etc.
Authority to stop or prompt corrective measures.
Rescue incident Command
On Scene -
- location
- description
- condition
- key phrase
Rescue incident Size Up
of victims, last know location
Operation mode - Rescue or recovery
Type of collapse & depth, width, length
Soil (compact, saturated, running)
Other hazards… water, sewer, gas, elect.
Rescue Incident Progress Report
Rescue Incident Progress Report
Hazard Control Group responsibilities…
Lighting and ventilation in trench
Mark utilities
Control leaking utilities
Rescue Doctrine Incident Priorities…
Firefighter safety Victim Access Medical Treatment Rescue Fire / hazard control Hazard Stabilization
Rescue Group
Control entry Provide emergency egress Edge protection Shoring Victim extrication, trapped or injured.
Competent person shall
be equipped with sounding / signal device
District personnel shall not enter to rescue depths greater than for what types of soil…
Greater than 5 feet for compact soil.
Greater than 4 feet for saturated or running soil.
Fall protection required when…
Retrieval System required when…
Trench deeper than 20 feet
Water in trench
Bell-bottom pier holes
permit required confined space.
Reasons contractors avoid OSHA shoring requirements
Cut costs Save time Misjudge soil Defective equipment Failure to see weather coming Lack of knowledge experience Lack of employee condition or skills
3 types of Shoring
Temporary Emergency Shoring
Emergency Shoring
Construction Grade Shoring
For recovery mode what type of shoring?
Construction Grade shoring
Describe Temporary Emergency Trench Shoring
ladders, backboards, cribbing
