hazardous materials protective actions. chapter 5: overview introduction incident management systems...
TRANSCRIPT
Hazardous Materials
Protective Actions
Chapter 5: Overview
• Introduction• Incident management systems• Hazardous materials management processes• Common incidents• Decontamination• Methods of decontamination• Summary
Basic Concept
• Do not allow others to become part of the incident (includes responders).
• Protect those already involved (rescue).• Protect those who may become effected by
the incident if it progresses (exposures).
Incident Management
• OSHA requires some form of incident management.
• Three current systems– Incident Command System (ICS)– Incident Management System (IMS)– Firescope
• All three have similarities– Management system for emergencies
Incident Management
• Focused on span of control– 4-6 people work for 1 supervisor
• Provides unity of command• Provides chain of command• Goal oriented– Strategic goals– Tactical objectives– Tactical methods
Command Positions
• Incident commander– Safety officer– Public information– Liaison officer
• Finance• Logistics• Operations• Planning
Incident Commander
• Runs the entire operation• Responsible for overall strategy• Delegates responsibility• Command staff assists• Unified command assists with decision making
Finance
• Responsible for bill paying• Tracks expenses• Records overtime• Handles all financial aspects of the incident
Logistics
• Responsible for obtaining and coordinating equipment
• Tracks available resources• Coordinates holding and storage of resources
Operations
• Directs the people who have “hands on” with the actual event
• Implements the tactical objectives• Assigns the tactical methods used to mitigate
the incident
Planning
• Plans for future needs• Must anticipate future logistical needs• For long-term incidents– Food– Shelter– Toilets– Rehab facilities
Branch Positions
• Under a management system, the span of control dictates the addition of other specified tasks.
• Under operations, the HAZMAT team will fill a number of positions known as branches.
Branch Positions
• Entry – at least 2 people• Backup – at least 2 people• Decontamination – decon leader and crew
members• Information and research• Reconnaissance• Resources (HAZMAT logistics)
HAZMAT Branch Leader
• Leads the HAZMAT team– Runs tactical portion of the incident– Reports to operations leader
• Assisted by HAZMAT safety officer– Assists overall safety officer– Looks for HAZMAT-specific concerns
Management Processes
• Used to organize HAZMAT-specific issues• Provide framework to set up an incident– 8 step process®
– GEDAPER©
– DECIDE process
8 Step Process®
• Site management and control
• Identify the problem• Hazard and risk
identification• Select PPE
• Information management and resource coordination
• Implement response objectives
• Decontamination• Terminate the
incident
GEDAPER©
• Gather information• Estimate potential
course and harm• Determine strategic
goals• Assess tactical
options and resources
• Plan and implement actions decided upon
• Evaluate• Review
DECIDE
• Detect the presence of hazardous materials• Estimate the likely harm• Choose a response objective
• Identify the action• Do the best that you can• Evaluate your progress
Isolation
• When arriving at a suspected chemical release, isolate the area from other persons who may inadvertently wander into a hazardous environment.
Rescue
• Emergency response work and rescue is inherently risky.
• Our best hope is to use methods to identify that risk and safely manage it.
Rescue
• Use a simple risk/benefit analysis when rescuing victims. A lot of risk is taken when a lot is at stake. No risk is taken when the benefit is little.
• Always wear protective clothing which includes the use of SCBA.
Top Ten Chemicals Released
• Sulfuric acid• Hydrochloric acid• Chlorine• Ammonia• Sodium hydroxide
• Gasoline • Natural gas• Propane• Oil • Methanol
Risk-Based Response
• Focuses on basic risk categories– Fire– Corrosive– Toxic– Radioactive
• Based on benefit• Used to rescue live victims or protect
endangered persons
Site Management
• For success, establish isolation areas.• Prevent movement of responders or victims
into hazard areas.– Hazard areas are known as zones, sectors, or other
area designation.
Hazard Area Designations
• Hot zone = exclusion zone = contaminated area= isolation area
• Warm zone = contamination reduction = set up area
• Cold zone = support zone = incident command area
Zones
Isolation Areas
• First responders need to establish the area.• To be wrong initially by being too large is
better than to be wrong by being too small.– Use technical resources to assist with exact size.– Use air monitors to establish hazard areas.– Adjust when resources are adequate.
Isolation Considerations
• Topography• Incoming resources• Weather conditions• Size of release• Type of material• Public exposure potential• Other exposures – water
sources
Evacuation and Sheltering
• Downwind and downhill at-risk areas• Two response actions– Evacuation– Shelter in place
• Determined by type of release and risk• Always use evacuation with large fires and
explosive risk.
Evacuation
• Time consuming• Mass notification difficult• Not always mandatory (state specific)• Difficult to evacuate large numbers of people– Road crowding– Panic– Shelter issues
Shelter in Place
• Usually preferred option• Difficult to inform everyone• Shut off HVAC system, windows, and doors• Notify and keep sheltered victims informed• Best for short-term releases
Reasons to Not Shelter in Place
• Large, fast moving fire situation• Explosion potential• Long-term release where chemical exposure
could rise in the building– Evacuation would result in lesser exposure
Types of Vapor Clouds
Types of Container Breaches
Common Incidents — Explosives
• The general rule with explosives is if the fire is near or is affecting the explosives, then emergency responders should isolate the area and back away.
• Life safety is the top priority.
Explosives Standoff Distances
Explosives
• All explosives should be handled by a bomb technician.
• Bombs brought into the fire station should only be handled by a bomb technician.
• Potentially explosive chemicals should only be handled by a bomb technician.
• There is a theme running through here………
Gases
• Natural gas– Very flammable– Rises quickly– Easily ignited by static
• Propane– Very flammable– Sinks and stays low– Easily ignited by static
Gas Cylinders
• BLEVE hazards• Usually contain liquids
which are liquid by pressurization
• Many cars, trucks, and other vehicles are powered by natural gas or propane.
Alternate Fuel Source
Flammable and Combustible Liquids
• Gasoline– Leading chemical
causing fatalities– Many are complacent
with gasoline
• Diesel fuel
Flammable and Combustible Liquids
Flammable Solids
• Burn readily• Burn quickly and with high heat– Highway warning flares
Water Reactives
• Can react with water or moisture in the air• May react violently– Sodium– Lithium
• May have minor reaction– Calcium carbide (acetylene)– Heat– Bubbling– Off-gasing (flammable or toxic gases)
Water Reactives
Spontaneously Combustible
• May be stored to prevent violent reaction• White phosphorus stored in water is stable– Exposed to air, violently reacts and ignites
Oxidizers
• Release oxygen molecules
• Increases fire risk• Most explosive
materials are oxidizers
Organic Peroxides
• Can react to light, heat, shock, and contamination
• May polymerize• Can be explosive or
violently reactive
Poisons
• Pesticides– Technical grade (almost pure)– Household grade (very dilute)
• Inhalation poisons• Environmental hazards
Radioactive Materials
• The key to safety is keeping the material contained.
• Limit your time, keep your distance, and wear some form of shielding when dealing with radiation.
Corrosives
• Most common– Sulfuric acid– Hydrochloric acid– Sodium hydroxide– Ammonia
Other Incidents
• The absence of a vapor cloud or odor does not mean that a potentially deadly material is not present.– Odorless– Colorless
Decontamination
• Removal of a chemical or material from a person, equipment, or environment
• May be performed by first responders• Crucial to overall safety• Chemical specific
Types of Decontamination
• Gross decontamination• Formal decontamination• Fine decontamination • Emergency
decontamination– Mass decontamination
Emergency Decontamination
• Responders should always be prepared for emergency decontamination.
• Runoff control is important, but do not delay decontamination to establish runoff control.
• Persons lives are always the priority.
Gross Decontamination
• Gets the majority of the contamination off– Gets the big chunks
• Usually the first wet step in the decon process– May involve showers or
hose set ups
Formal Decontamination
• Scrubbing and rinsing• Introduction of a decon
solution– Soap and water are good
• Steps usually repeated• Involves removal of PPE• Done by decon team
members
Fine Decontamination
• Hospital-based• After formal decontamination• For the more intricate parts of the body• Hospital personnel need HAZMAT training and
equipment.
Mass Decontamination
• Most decon setups are for the HAZMAT team.• Mass decon is for large numbers of people.– More than 10 is usually mass numbers.
• It is usually water-based.• Clothing removal provides more than 80%
removal of the contaminant.
Methods of Decontamination
Methods of Decontamination
Methods of Decontamination
Methods of Decontamination
Full Decontamination Process
• Tool drop• Gross
decontamination• Formal
decontamination• PPE removal
• SCBA removal• Clothing removal• Body wash
(emergency only)• Dry off• Medical evaluation
Full Decontamination Process
Full Decontamination Process
Methods of Decontamination
• Absorption• Adsorption• Covering• Dilution• Disinfection• Disposal
• Emulsification• Neutralization• Overpacking• Removal• Solidification• Vacuuming• Vapor dispersion
Methods of Decontamination
Summary
• Incident management systems• Hazardous materials management processes• Common incidents• Decontamination• Methods of decontamination