TB 4 - Gasoline Tank Truck-Trailer Incidents Flashcards
Primary consideration of emergency responders shall be the preservation of life, _______, and the environment, in that order.
Property
What are the three basic types of vehicle-tank configurations?
- Single tank truck with two axles (3,000gal) or three axles (5,000gal).
- Tank tractor with semi-trailer connected by fifth-wheel (9,000gal)
- Tank tractor pulling a two-axle trailer (9,000gal)
Tanker incident precautions:
Firefighters should isolate the incident by setting perimeters using what piece of equipment?
Combustible gas indicator
The following general safety precautions shall be taken by all personnel at all tanker incidents:
-Full PPE and SCBA
-Avoid contact with product or vapors
-avoid contact with tank truck
-avoid breaking foam blanket
-isolate area and set perimeters
-approach uphill/upwind
Actions for Gasoline Tanker Incident – No Leak:
• Treat all incidents as if there is a leak until it is confirmed there is not a leak.
• Full PPE with SCBA
• Monitor incident area with combustible gas indicator.
• Perform preliminary container integrity examination
(Construction and design features allow for early tank failure at relatively low temperatures with pressure relief devices designed to maintain 3 to 5 psi. BLEVE should NOT be a consideration.)
Actions for Gasoline Tanker Incident – Leak, No Fire:
• Eliminate potential ignition sources a MINIMUM of 100 feet from the spill.
• Turn off vehicle ignition, if possible
• Use combustible gas indicator to verify atmosphere around BATTERY TERMINAL is below 10% LEL BEFORE disconnecting or disabling.
• Set incident perimeters using 5 gas monitors.
• Contain runoff
• Affected area surrounding the tank shall be covered with foam.
For tanker with only a tire fire use a minimum ______ hose line with a minimum of _____ gpm. Consider vehicle FUEL TANKS as a SECONDARY HAZARD, secure sufficient water supply for potential of incident.
1 1/2” hoseline with 125 gpm
Fire Attack actions for Gasoline Tanker Incident – Fires Involving Spilled Liquid or Tanker:
• Spot apparatus uphill and preferably upwind of incident.
• Secure water supply sufficient for multiple master stream operations.
• DO NOT USE PLAIN WATER UNLESS IT IS TO PERFORM A RESCUE
• Make fire attack using FOAM LINES.
• Use dikes to keep spilled, flowing or burning product from storm drains.
Actions if a tankers product has entered subterranean levels (vaults, storm drains, sewer system, etc.):
• Contact appropriate agencies for mitigation and recovery efforts
• Monitor possible areas that may become explosive or pool flammable vapors
• Use LAFD Hazmat for enhanced surveying
When is the offensive attack used on tanker incidents?
-there is an immediate life hazard
-there is enough personnel, apparatus, equipment and foam on scene to extinguish the fire
When can you use plain water instead of foam during a tanker incident?
-For immediate life hazard/rescue operation. (Use plain water IF foam setup will cause delay)
….Never direct water stream into flames or cargo tank (burning product will overflow)
Offensive Attack Actions for Tanker Fires:
-Never direct cooling stream into flames or cargo tank, product will overflow and spread
-Use alcohol resistant aqueous film forming foam (AR AFFF)
- Plan for 15 min supply of foam concentrate for suppression ops (additional 15 mins for foam blanket maintenance)
- Aggressive deluge to extinguish fire
-Apply foam in a soft arc (do not direct steams below surface of liquid)
-Reapply foam as necessary
Foam tenders are capable of introducing compressed air into the foam lines, increasing reach and minimizing water use and run off.
LAFD foam tenders carry _______ gallons of class B foam.
1000 gallons
When is the defensive attack used on tanker incidents?
- No life, exposure, or environmental hazards
-insufficient staffing and equipment to perform offensive attack
Defensive Attack Actions for Tanker Fires:
When a defensive attack is employed the idea is to let the fire BURN ITSELF OUT.
- No fire extinguishment activities
- Protect personnel, apparatus, and exposures from radiant heat
- Control runoff
-Use dikes to protect storm drains