Phx Fire Vol 2 (Deck 13) Flashcards
204.04 - 204.10
204.04
Flammable Liquid Incidents
Disposal process for large quantity spills of flammable liquids.
Disposed of by a specialized haz mat clean-up contractor per C99, which may require a fuel transfer pump or vacuum truck and personnel familiar with fuel transfer precautions.
Safety measures should be taken when working in the hazard zone of a flammable liquid spill?
Wear full PPE including SCBA with face piece on. Unless absolutely necessary, personnel shall not work in a spill area. When necessary, the spill must be covered with foam and all possible precautions against ignition must be taken, and the area shall be monitored with a combustible gas indicator.
Role of Car 99 in handling fire code violations related to flammable liquid incidents.
Dispatched to investigate fire code violations take appropriate action.
How should smaller spills of flammable liquids be handled?
Smaller spills, which cannot be picked up with a tanker, must be absorbed if it has not already evaporated. Special Ops carries small amounts of absorbent, but the most often used and preferred method is using sand delivered by the Streets Dept.
Response required for large quantity spills of flammable liquids.
Large quantity spills require the response of a unit from the Haz Mat Response Team in addition to Car 957.
Characteristics of natural gas.
Methane is extremely flammable, lighter than air, colorless, and odorless. Mercaptan is added to help indicate its presence, resulting in an odor like rotten eggs.
Flammable range of natural gas by volume?
4% LEL to 15% UEL by volume.
How should fires involving natural gas be controlled?
Stopping the flow of gas. In most cases, burning natural gas should not be extinguished.
Role of Combustible Gas Indicator in evaluating the presence of natural gas.
Presence of natural gas in its flammable range can be evaluated with the use of a Combustible Gas Indicator, typically done by Haz Mat Response Teams (HMRT) and/or the appropriate utility company.
Approach should be used in managing incidents involving natural gas?
Risk management profile and strategic decision-making model (M.P. 201.01C), while also applying good judgment and experience.
Potential hazards associated with natural gas leaks above ground versus below ground.
Above ground are much easier to manage than below ground leaks. Confined natural gas has the potential for a catastrophic explosion.
204.05
Natural Gas Emergencies
Importance of remaining vigilant in responding to natural gas emergencies?
Prevent complacency due to the extreme flammability and potential hazards associated with natural gas.
Actions of the first arriving unit (non Haz-Mat) in a natural gas emergency.
Scene size up, establish command, attempt to locate the homeowner/RP, evacuate the area, isolate the scene, deny entry, and ensure personnel safety practices are in place.
Actions of the first arriving Haz-Mat unit in a natural gas emergency?
Assign Hazard Sector, ensure FF safety practices, contact initial crews and RP for information, reevaluate the Hot Zone using metering devices, and gather necessary tools and equipment.
Define the term ‘Hot Zone’ in the context of a natural gas emergency.
Area where the natural gas leak is present, requiring specific safety measures and equipment for personnel working within it.
How should the first arriving unit handle a situation that could become dangerous due to gas migration in a natural gas emergency?
Consciously avoid committing apparatus or personnel to the dangerous situation and attempt to gather information while working towards an ‘All Clear’ of the immediate area.
Specific response to incidents involving a reported gas leak with no fire or explosion?
Range from minor to potentially hazardous situations and require appropriate assessment and action.
Safety practices for personnel working in the Hot Zone during a natural gas emergency.
Appropriate PPE with SCBA, having a charged hose line in place, and ensuring personnel safety practices are followed.
First arriving Haz-Mat unit if gas company personnel are needed to assist with mitigation efforts in a natural gas emergency?
Ensure that they are dressed in appropriate PPE, including SCBA’s, and gather necessary tools and equipment.
How should the first arriving unit handle a natural gas emergency if the incident is determined to be a natural gas leak?
Ensure that personnel safety practices are in place, establish a water supply, and have a charged hose line in place, which must be attended when Haz-Mat crews or gas company personnel are securing the leak.
Approach to uncontrolled flammable gas leaks in the context of natural gas emergencies.
Appropriate size up, establishing and controlling the perimeter, and hazard mitigation to ensure safe and effective operations.
Recommended action for the first arriving unit if gas company personnel are on the scene of a natural gas emergency?
Make contact with the on-scene gas company personnel to determine needs.