Hazmat Flashcards
The status of containers involved will likely influence the
Type and extent of defensive practices undertaken
First responders should constantly assess the status of
Any containers that may be involved
First responders must evaluate the ———-where the container is located and any ——- that may be applied to containers
Environment
Stress
Types of stress
Thermal mechanical chemical
When attempting to prevent a release of hazardous materials first responders should always remember that
Pressurized containers usually present the greatest danger
If the valve on a compressed gas cylinder is damaged gas or vapor may be released at a rate and volume
Faster than it would be from a pressure relief device
Physical damage to a container wall may appear as a crease dent or gouge and the extent of damage will influence the extent to which
The integrity of the container has been weekend
Damage is especially troublesome when it occurs at
Weld lines or places where pieces of metal are joined
If a damaged and therefore weakened container cannot withstand its internal pressure immediately after an accident the container will likely
Explode prior to the arrival of first responders
If the internal pressure increases sufficiently to a point just above that which the weakened container wall can resist the container may
Fail without warning
Liquefied gases stored at normal atmospheric temperatures and pressures are already
Boiling inside their containers
Once the liquid inside is above it’s boiling point the containers become
Pressure cookers with the potential for disastrous consequences
The weakening of a container wall from flame impingement usually occurs when the flame contacts
The vapor space which is usually the upper portion of a container
Whenever containers are exposed to a fire with a decrease in container strength and increase of internal pressure first responders must remember that
Operation of a pressure relief valve is no guarantee that the container will not explode
The sound of gas and vapor escaping from an operating pressure relief device during a fire will increase in both ———-as internal pressure continues to rise due to an external heating. This change in sound should serve as a warning to first responders that they may need to——
Volume and pitch
immediately evacuate the area
Containers intended to store liquids at normal temperatures and pressures usually do not
Unless
Present a danger from excessive internal pressure
There is an external heating or chemical reaction of the contents inside the container
External heating can occur from exposure to
Direct sunlight or fire
Long-term incidents have a potential for the internal pressure of containers to fluctuate due to changes in
Weather conditions and time of day
Non-pressure containers with liquid or solid materials may also be subject to excessive internal pressure from chemical reactions that occur as a result of
Improper handling of unstable materials
non pressure containers: Metal containers may develop a ——as internal pressure increases and stresses the container wall
Metallic pinging sound
The ends of ——– are usually the weakest locations and therefore the most dangerous
Non-pressure containers
Non-pressure containers: if the container of liquid burst it will usually do so at——— which may then cause the container to travel in——-
One of its ends
travel in the opposite direction at a high rate of speed
Nonpressure containers: There may be little first responders can do to prevent a release from a container that is
Already under pressure or
when the internal pressure is steadily increasing
Evacuating the area a safe distance may be the only option
Containers under pressure can release their contents
Without warning
——–Used to cool containers usually present a lesser danger to personnel than do handheld lines
Master streams
Using water to cool containers: large amounts of water may be required and the ability of fire departments to meet these demands could be limited especially if
Operations involve the use of water SHUTTLES
During vehicle accidents involving hazardous materials first responders should attempt to learn not only what materials are present but also
The type of container involved
Containers made of glass cardboard or plastic generally have less ———–than metal containers
Structural integrity
A first responder should never assume that no evidence of an external leak from a ———–involved in an accident is actually an indication that no containers in the truck have been damaged
Box truck
If containers of hazardous materials are undamaged they often need to be unloaded before attempting to recover a damaged vehicle in order to prevent these containers from
Leaking during the recovery process
Efforts to remove containers of hazardous materials will likely require a
Hazardous materials team or cleanup contractor to assess the conditions of the containers and conduct the transfer of the containers to another vehicle
In some situations preventing the release of hazardous materials may require overhaul to be conducted in conjunction with
Cleanup contractors
Preventing the release of hazardous materials during ———-requires extreme care
Overhaul of structure fires
When dealing with releases of LIQUIDS any attempt by first responders to control and contain the movement of these materials should be done only if
Their actions will not Expose personnel to the hazards of the material
The dike should be capable of holding the entire contents of the container but first responders should be prepared in the event that
The dike fails
During incidents involving leaking bulk liquid storage containers first responders should always
Monitor the integrity of any dikes and be prepared to react should they suspect impending failure
Whether dikes are used outdoors or inside buildings they will allow hazardous materials ——–to which may result in——-
Form into a pool
large surface area
If a liquid is moving from the site of a release there will be several considerations that will influence the decision of first responders to intervene including
The nature of the spilled material
the quality released
the speed it’s moving
whether the release is ongoing
Some liquid spills may encounter——– that will subsequently contain the release and thereby minimize the amount of effort needed by first responders to construct temporary barriers
Natural barriers
Temporary barriers to contain a spilled liquid can be built from
Soil or absorbants
Anything used to build temporary barriers must be ——–with the hazardous material released
Compatible
The product first responders are attempting to contain must not result in a——— when it contacts the temporary barrier
Violent chemical reaction
Temporary containment barriers built on land: ERG 2004 suggest the use of ————when dealing with spills of certain types of hazardous materials
Dry earth, dry sand, or other noncombustible material
First responders may be able to control the flow of a liquid spill moving downhill using a ———that directs the material to an area where can be contained or result in less harm
Diversion wall
Containment areas could be a depression along a road shoulder or a large hole sometimes referred to as a
Retention basin
dug by first responders for the purpose of containing the runoff
When preparing to dig a retention basin, first responders must always remember that any effort to excavate a containment area must take into consideration
Especially important when
The presence of underground utilities.
Working to contain spills that occur on the shoulders of highways or railroad right-of-way’s since these areas are often the site of underground utilities
The location of some underground utilities maybe marked using ——-that include an______
Aboveground signs
emergency telephone number
Some underground utilities maybe Marked using aboveground signs. many more utilities are not marked and first responders must pay attention to
Obvious indicators that underground utilities are nearby
Obvious indicators that underground utilities are nearby
Pad mounted transformers, manhole covers, valve boxes, and utility poles outfitted with an attached cable that runs from the top of the pole to an underground connection at it base
Most areas of the United States are served by companies whose job it is to locate underground utilities for construction contractors usually within—-
Many of these companies will provide some form of
48 hours of notification
Emergency utility locating service for first responders
Emergency utility locating service:
he must inform the operator of a need for ——-
he should be prepared to provide the operator with his——
Immediate assistance
location and a callback number
The response time of utility representatives will vary so a first responders should
Remind them that they are dealing with an emergency situation
First responders should learn the details of local and state laws in their area that govern
Locating services for underground utilities
Absorbent booms: the material they are attempting to contain will need to have the following characteristics
- cannot be miscible with water
- most float on the surface of water
On bodies of water first responders may be able to contain liquids by using ———designed to float on water
Absorbent booms
A floating absorbent boom would likely be affective to contain a release of ——–the same boom would be useless when attempting to contain a spill of——-
Diesel fuel
Antifreeze solution
Absorbent boobs are generally not intended for use on large bodies of water where there may be
Significant wave action or strong currents
Absorbent brooms usually work well in
Small creeks streams and ponds
Most absorbent booms are manufactured in ——–but they are designed to be——-
10 foot sections
hooked together if needed to cover a greater distance
The ends of absorbent booms must be
This can be accomplished using
Secured to the shoreline
Wood or metal stakes driven through the metal rings normally attached to the each end of the boom
Underflow dams are best used in
Narrow creeks and streams with flowing water
Underflow dam: the hose is placed in the water with only about ——-of the hose in front of where the dam will be built
2 ft
Under flow dam. Steps
- Rocks or tree limbs placed on the bottom of the Creek or stream
- hose placed in water
- soil placed around pipe between each shoreline
When building an underflow dam, any pipe used must be large enough to allow the water to
Flow freely
Underflow dams are subject to ——and must be——
Corrosion from the force of moving water
monitored at all times
An important consideration for first responders to remember when attempting to contain the release of a spilled liquid is
That of redundancy
Redundancy
Whenever possible temporary containment barriers should be backed up by additional barriers
The location of any containment device used in a body of water should always take into consideration
The eventual removal of the material
Removal of a hazardous material that is floating on the surface of water may involve the use of
Absorbent pads
When choosing a location for placement of absorbent booms or underflow dams especially for releases that involve large quantities of product first responders should consider
The means by which a large vehicle can approach the site
First responders who have contained any liquid material must continuously monitor
Temporary barriers to ensure their integrity
When dealing with ——-spills involving some types of —— ERG 2004 recommends applying flooding quantities of water
Small
Oxidizers
While applying large quantities of water can dilute a spill to a safer and more stable concentration before doing so a first responder should remember to FIRST
Check with local and state environmental officials and conduct research to determine potential outcomes
With few exceptions adding water to a spill of hazardous materials will
Move the material to another location creating a larger cleanup problem
First responder should never apply water to a spill of hazardous materials unless they are confident that doing so will
Not cause their efforts to become part of the problem
Dealing with gases and vapors always presents significant challenges since many of these materials
Are odorless and colorless
First responders may be able to identify compressed gas cylinders suspected of leaking since there may be
FROSTING near the discharge opening
Frosting occurs as moisture in the surrounding atmosphere is
Cooled by the escaping gas or vapor
Factors to consider when deciding what steps to take to control a release of gases and vapors
Type of material, quantity, speed, and duration of release
———Pose inhalation hazards as well as a greater threat from fire or explosion since gases and vapors are easily ignited
Airborne hazards
The most difficult form of material to control is a ———-, sense when a material is in this physical state it may———
Gas or vapor
travel unimpeded
Increased temperature can ———-of gases and vapors and for liquids it can increase the rate at which the———produces vapors
Accelerate the activity
surface area
Airborne materials can quickly fill a void space depending upon whether the material is
Heavier or lighter than the surrounding air
Controlling the movement of gases and vapors indoors can be as simple as
Closing a door to a room along with shutting down the ventilation system
Controlling vapors and gases within buildings: if an area where the ventilation controls are located is not safe to enter it may be better to
Have Electric power to the building terminated from a remote site
Natural gas released indoors can migrate upwards into an attic space only to be ignited later by an
Attic fan
Propane can seep into the crawlspace of a house and explode once ignited by a
Floor furnace
Releases of natural gas or propane may be controlled if there is an ——–that can be operated safely by first responders
External valve
External valve/natural gas or propane: this valve must be remote from the source of the release to avoid contamination and must—-
Clearly indicate the position of the valve
First responders should usually not operate——- for———- unless instructed to do so by the local utility company that manages the service
Below grade street valves
natural gas service
Before applying water to a gas or vapor first responders should make sure they
Know what to expect, since some will produce a hazardous water runoff
Attempting to control a release of chlorine gas with water spray may produce a
Corrosive runoff
Water spray applied to flammable gases and vapors will
Not always prevent ignition. air entrained in a fog stream could mix with these materials and cause them to reach their flammable range
During freezing weather large volumes of water spray can produce icy conditions that may require the application of an
Abrasive such as sand
Releases of solid hazardous materials usually occur in the form of a
Powder or granular substance
Containing the release of a solid: large containers constructed of metal or plastic have the potential to release
Several hundred pounds of material
Some hazardous materials may be transported in solid form by——-or———that have the potential to release thousands of pounds powder or granular substance
Dump trucks or dry bulk hopper cars
Containing the release of a solid:————will play a role in determining the actions of first responders
Wind speed and direction
The addition of water to a spill of solid hazardous materials may only create more problems. this is especially important to remember if the material is
Soluble
Containing the release of a solid: ERG2004 recommends covering spills of some materials with a ———–to reduce the potential for the material to spread and to keep the material dry
Plastic sheet or tarp
Whenever operating ventilation systems first responders must remember
Not to expose anyone assigned this task to the hazardous material vapors they are attempting to control
Defensive tactics that can be used by first responders to minimize the exposure of people to hazardous materials
Protective actions
Protective actions include
- Isolating and denied entry to affected areas
- evacuation of these areas
- in place protection a nearby structures
Upon arrival at most hazardous materials incidents first responders will often be faced with the task of
Isolating affected areas
While dealing with transportation emergencies first responders can consult
The ERG
Each orange bordered page of the ERG proves———–under the heading Public Safety
Recommended distances for IMMEDIATE ISOLATION for a spill or leak
ERG 2004 provides recommendations for protecting the public from spills that involve dangerous goods which are considered toxic by inhalation TIH including certain chemical warfare agents or which produce toxic gases upon contact with water. This information is found in the table of initial isolation and protective action distances green border pages and is intended to show areas likely to be affected during the————after materials are released
First 30 minutes
When attempting to determine the size of an ———– first responders should resist the urge to overreact and instead establish a ——–
Initial isolation area
Reasonable area
In order to———— first responders may be able to use existing physical barriers such as highway guardrails or median strips during highway accidents or by closing doors to isolate certain areas inside buildings on some occasions they may elect to use barrier tape
Define isolation areas
First responders should never rely on barrier tape as the only means to
Define an area affected by a hazardous material
———Should be monitored by first responders including law-enforcement officers to ensure compliance
The use of barrier tape
Law-enforcement officers may be requested to block roads or detour traffic when doing so first responders must remember not to place these individuals in areas where they can be affected by
Airborne hazards
Efforts to————– and———-Are effective defensive tactics for most hazardous materials incidents
Isolate affected areas
deny entry
Those incidents associated with————usually require additional defensive tactics in order to protect the public
Airborne hazards
Evacuation involves
The removal of people from an area
The intent of in place protection is to
Have individuals remain in an affected area,
while inside structures with doors and windows CLOSED and SEALED and ventilation equipment SWITCHED OFF
When time allows ————may be the best protective action
Evacuation of buildings in an affected area
Evacuation may also be a preferred method of defensive protective actions if a material released is ——–or———- .such as when——–
Flammable
it will likely take a long time for the material to dissipate
heavier than air gas is released on a day with very little wind
Serious considerations when deciding on evacuation include
- Where to shelter evacuees
- how to get these individuals to shelters
- how to care for them once they arrive
It is entirely possible for first responders to use both evacuation and in place protection simultaneously as a
Defensive protective action
Once first responders decide on either in place protection or evacuation their next challenge is often
To notify individuals in the affected area of suggested actions to take
(Evacuation and in place protection) all of these techniques are easier to accomplish during——-
Daylight and evening hours
as opposed to
late-night or or early morning
(Evacuation and in place protection) some localities have technology that allows emergency officials to contact people in affected areas by telephone using
A special modification to an already established 911 system. they can deliver a recorded message with emergency information
A first responder should always know which people to contact in his———– regarding any actions he may wish to take regarding evacuation or in place protection
Local emergency management office
Emergency management officials are often prepared with the knowledge of
- How to request local media transmit emergency messages
- available shelters, shelter operations, and transportation
- how to operate shelters in a safe and efficient manner
(Evacuation and in place protection) First responder should remember that———- is a serious concern especially when dealing with——–
Accountability for evacuees
children
——-will be unavoidable during the———-of any evacuation and local emergency management officials can provide valuable assistance here
Confusion
initial phase
Accountability is even more challenging when
More than one sheltering site is used
When attempting to document notification of citizens in affected areas, while going door to door one suggestion is to ———————
This indicates that—-
Mark the front door of each building or perhaps a mailbox with a small piece of triage tape
A Public Safety official has already visited that location
(Document notification of citizens) some first responders may elect to use 2 different colors, one to indicate———and another to signify———-
Contact with the occupants
no response
When challenged regarding decisions that involve defensive protective actions first responders should always remember:
An inconvenience is temporary dead is forever
First responders conducting any—————- should always consider the use of full protective clothing and SCBA
Defensive actions to contain or control the release of a hazardous material
Firefighter protective clothing offers limited protection from
Hazardous materials
The best way to decontaminate any protective clothing is to
Avoid contamination
Despite the efforts of first responders to use their protective clothing properly and avoid contamination they should always be prepared to
Decontaminate this clothing
ERG 2004 decontamination is the removal of dangerous goods (hazardous materials) from personnel and equipment to the extent necessary to
Prevent potential adverse health effects
(Decontamination) this should be done with a least a ——————–especially when————
Gross wash prior to leaving the scene of most hazardous materials incidents
they have engaged in certain defensive actions
In addition to a gross wash first responders may need to scrub protective clothing with a———— prior to———
If there is any concern regarding contamination from———
Soap solution
removing the garment
some chemicals
Removal of protective clothing should be done in a manner that
Turns the garment inside out
In garment in need of additional cleaning off-site should be placed into
Large clear trash bags
The manufacturer of the protective clothing should then be consulted to determine
The best method to clean the garment and whether the garment can be returned to service
The garment may be taken to a vendor for cleaning such as a fire equipment supplier who offers this service. if so the first responder must remember to
Provide them with a copy of the MSDS for the material that is the source of the contamination
Water supply for decontamination can be provided by
Hose lines from the fire apparatus
Garden hose adapters
1 3/4” hose line
booster hose
First responders should attempt to contain runoff water during decontamination of ———–at the scene of a hazardous materials incident
Protective clothing
Decontamination of first responders: some departments may use —————–including small plastic swimming pools
Specially designed containment basins
Temporary containment basins can be constructed using
2 sections of hard suction hose
pipe poles or attic ladders
sheets of CLEAR plastic or tarps
Construction of a containment basin: plastic sheet or tarp is laid over the frame and
Tucked underneath each of the four crossmembers
The task of disposing of decontamination runoff water is usually done
In conjunction with the disposal of other hazardous waste generated during the incident
Decontamination runoff water: first responders may be able to dispose of this water on site but representatives from ————should FIRST be consulted to determine if this action is appropriate
Environmental regulatory agencies
While a gas is usually the most difficult form and a material to control ————–will present first responders with hazards similar to a gas
Vapor from liquids and dusts from solids
—–Usually present the greatest danger to first responders
Pressurized containers
First responders who contain the release of a liquid hazardous material may then need to deal with
A surface area capable of producing large amounts of hazardous vapors
Attempts to contain the release of gases and vapors with water may
Produce a hazardous water runoff
First responders should not operate————- unless instructed to do so by the local utility company
Below grade street valves for natural gas service
First responder should resist the urge to wet down to wash away spills of
Hazardous materials in solid form
Individuals assigned the task of traffic control should not be placed in areas where they can be affected by
Airborne hazards
Protective actions used by first responders include
- Isolating and denying entry
- evacuation
- in place protection
———-Include efforts to minimize contamination by avoiding spill materials and resisting the urge to touch or otherwise handle containers
Safe work practices
first responders should always be prepared to decontaminate their protective clothing with ———–prior to leaving the scene of most hazardous materials incidents
At least a gross wash
When dealing with citizen complaints regarding decisions to evacuate people during a hazardous materials incident the first responder should always remember
An inconvenience is temporary. dead is forever
A bobtailed tractor one without the trailer has the potential for a spill of —–gallons of diesel fuel from its fuel tanks
Several hundred
When responding to a ————-first responders must determine if hazardous materials are involved and if there is a release of potential release of these materials
Highway transportation incident
Included in the———- are identification tools known as labels and placards
Code of Federal Regulations-transportation
——–Often allow first responders to detect the presence of a hazardous material from a safe distance
Labels and placards
Labels and Placards
the information provided is usually limited to a materials——- rather than the ——-of the material
Hazard class
name
(Only a materials hazard class) this is generally due to the fact that many highway transportation incidents involve vehicles that
could each contain Numerous types of hazardous material packages
——-may contain only one or two commodities
Large containers such as cargo tanks
——-Are normally applied to non-bulk containers
Labels
Labels usually measure
AT LEAST 3.9” on each side
——Can be printed on the exterior surface of a package or placed on a securely affixed tag. another means to affix labels includes adhesive backings
Labels
Placards are normally affixed to the ———— of transport vehicles such as vans cargo tanks straight body trucks and semi trailers
Front
rear
both sides
First responder should be aware that the ———–of some truck tractors may incorporate a cab configuration intended to direct airflow around the trailer
Aerodynamic design
Placards may also be found on certain———- such as large portable tanks
Large individual packages
Placards usually measure——-
and are generally made of ——–design for placement in a———-
At least 10.8 inches on each side
plastic or tag Board
metal frame or
vinyl with adhesive backing
There are devices mounted on the sides of some transport vehicles with———— that allow for selection of the appropriate placard
Hinged metal panels
Labels and Placards function primarily as an ——— designed to alert first responders to materials assigned——–
Information system
hazard class
Knowing at least the hazard class will enable first responders to make ——-during the ——of an incident involving a transportation mishap.
Better informed decisions
early stages
Label and Placher information system include
Background color
hazard class name
hazard class number
symbol
Label and placard information system displayed in the center
Hazard class name
Label and placard information system single digit number displayed in the lower corner
Hazard class number
Label and Placard information system displayed in the upper corner
Symbol
The determination of a background color, hazard class number, and symbol is usually dependent upon the
Primary hazard class of a material
White background color
Poisonous
Red background color
Flammable (liquid or gas)
Flame symbol
Flammable (solid liquid or gas)
The display of a hazardous materials ————is sometimes required on transport vehicles for various shipments of hazardous materials
Four digit identification number
Four digit identification number: in the———— this number is usually referred to as a——–
Federal transportation regulations
marking
Can help determine the name of the product
identification number
Or at least several products that share similar characteristics
———–Is often displayed in the center of the placard and as such the———— will not be immediately available
Four digit identification number
name of the hazard class
A red placard with a flame signal symbol may display either a———- as a hazard class number
2 or 3
A red Placard with a flame signal and a hazard class number three would represent a
Flammable liquid
A red placard with a flame signal and the hazard class number 2 would represent a
Flammable gas
A placard for a gas that is poisonous by inhalation will display a
hazard class number—–
Back ground color—–
Symbol—–
2
White
skull and cross bones
Hazard class 2 white background color symbol crossbones symbol
Gas that is poisonous by inhalation