TB 4 - Gasoline Tank Truck-Trailer Incidents Flashcards

1
Q

Primary consideration of emergency responders shall be the preservation of life, _______, and the environment, in that order.

A

Property

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2
Q

What are the three basic types of vehicle-tank configurations?

A
  1. Single tank truck with two axles (3,000gal) or three axles (5,000gal).
  2. Tank tractor with semi-trailer connected by fifth-wheel (9,000gal)
  3. Tank tractor pulling a two-axle trailer (9,000gal)
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3
Q

Tanker incident precautions:

Firefighters should isolate the incident by setting perimeters using what piece of equipment?

A

Combustible gas indicator

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4
Q

The following general safety precautions shall be taken by all personnel at all tanker incidents:

A

-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

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5
Q

Actions for Gasoline Tanker Incident – No Leak:

A

• 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.)

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6
Q

Actions for Gasoline Tanker Incident – Leak, No Fire:

A

• 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.

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7
Q

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.

A

1 1/2” hoseline with 125 gpm

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8
Q

Fire Attack actions for Gasoline Tanker Incident – Fires Involving Spilled Liquid or Tanker:

A

• 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.

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9
Q

Actions if a tankers product has entered subterranean levels (vaults, storm drains, sewer system, etc.):

A

• 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

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10
Q

When is the offensive attack used on tanker incidents?

A

-there is an immediate life hazard

-there is enough personnel, apparatus, equipment and foam on scene to extinguish the fire

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11
Q

When can you use plain water instead of foam during a tanker incident?

A

-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)

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12
Q

Offensive Attack Actions for Tanker Fires:

A

-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

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13
Q

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.

A

1000 gallons

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14
Q

When is the defensive attack used on tanker incidents?

A
  • No life, exposure, or environmental hazards

-insufficient staffing and equipment to perform offensive attack

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15
Q

Defensive Attack Actions for Tanker Fires:

A

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

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16
Q

Aluminum tanks will melt at about _______°F and the exposed fuel will burn at the liquid level.

A

1,200

17
Q

OVERTURNED gasoline truck/trailer incidents are even more challenging for the following reasons:

A

• Additional stability issues with the overturned vehicle.

• Increased likelihood of a spill, leak and/or fire.

• Automatic necessity for off-loading operation.

18
Q

Overturned Tanker:

Disconnection of the tow bar shall only be performed by ________ personnel and only after product off-loading.

A

-trained heavy wrecker

(Tremendous energy may be stored in an overturned trailer tow bar.)

19
Q

Even after confirming a private clean-up company’s qualifications (appropriate training, documentation, personnel and equipment), ________ shall handle all product off-loading (stinger operations).

A

LAFD Hazardous Materials companies

20
Q

The request of ordering private clean-up resources through MFC requires the approval of?

A

The Deputy Department Commander

21
Q

Tanker incidents on state highways/freeways:

  1. The _______ has AUTHORITY over Hazardous Materials incidents on State roadways.
  2. _________ is responsible for CLEAN-UP of State highways/freeways
A
  1. California Highway Patrol
    (Historically, the CHP abdicates it’s authority to the Los Angeles Fire Department in dynamic incidents with life and fire hazards.)
  2. CalTrans
22
Q

It is imperative that vacuum trucks are ordered early in an incident, because it is not uncommon to have a one- or two-hour wait between when the trucks are requested and when they arrive.

Vacuum trucks are available in multiple sizes, but _____ and ______ gallon capacities are available from most hazardous materials waste haulers.

A

2,500 and 5,000 gal

23
Q

Use the following guidelines when ordering vacuum trucks for spills and/or off-loading:

A

• 1 – 2,500 gallon truck for incidents up to 2,000 gallons

• 1 – 5,000 gallon truck for incidents between 2,000 and 4,500 gallons

• 2 – 5,000 gallon trucks for incidents involving a 4,800 gallon trailer

• 3 – 5,000 gallon trucks for incidents involving tank combinations up to 9,000 gallons

24
Q

Vacuum Trucks are classified by what three tank cleanliness standards?

A
  1. Dirty – Tank is empty of product, but it has not been cleaned.
  2. Clean – Tank is empty of product and has been washed with water, but there is a possible trace of water and product from the previous load.
  3. Super Clean – Tank has been chemically cleaned and is free of product.
25
Q

The IC should order the “______” type vacuum trucks when requesting the appropriate vacuum truck CLEANLINESS CLASSIFICATION.

A

Request “CLEAN” vacuum trucks to PREVENT any possibility of a reaction between a “dirty” tank and the off loaded or cleaned up material.

“Super-clean” trucks are UNNECESSARILY expensive.

26
Q

Non-Pressure Liquid Tank Design and Construction:

A

-Most tanks are made of aluminum

-Tank wall is thickest at bottom (3/16”) and gets thinner towards the top. (Tank is not equally strong in all positions)

-Tanks are designed to carry load in upright position

-Tanks must be off-loaded prior to being uprighted

-tanks usually have 2 to 4 compartments, with single bulkheads separating compartments

-DOUBLE BULKHEADS are required when carrying FLAMMABLE products with different flashpoints

-Void space between double bulkheads contain a leak indicator hole and could contain up to 200 GALLONS of PRODUCT in the void space (NEVER REMOVE ANY PLUG)

-BAFFLES are installed primarily for TANK STRENGTH (do very little to reduce surge of product)

-Even when full, each compartment will have a vapor space

-The individual compartments are generally either full or empty. They are not designed to deliver partial loads.

-All EXTERNAL PIPING is constructed with built-in SHEAR POINTS.

27
Q

The best way to determine the amount of product left in trucks is to gather information from?

A

the driver or consult the shipper’s manifest

28
Q

If product is suspected in a tanks void space, a _______ will drill if necessary and pump out the compartment.

A

Hazardous Materials Task Force (HMTF)

29
Q

the LAFD regulates flammable and combustible liquid tank trucks in Division _____ of the Fire Code.

A

38

30
Q

Gasoline Tanker

The rule of thumb is gasoline will burn at the rate of about _____ foot per hour, vertically, regardless of the surface area.

A

1 foot