Hazardous Materials Operations Refresher 2002

Hazardous Materials Operations Refresher 2002 Instructor Guide Topic: Hazardous Materials Operations Refresher 2002 Time Required: Three Hours Materials:    · Appropriate Audio Visual Support    · Emergency Response...


  6. Initial isolation and protective action distances - green pages

  7. Criminal/terrorist use of chemical/biological agents

E. Risk Factors

  1. People

  2. Property including livestock

  3. Environment

F. Estimate Likely Harm

  1. Gather information

  2. Analyze information

  3. Assess information

  4. Make predictions

  5. Compile estimates

G. Response Objectives

  1. Prevent container failure

  2. Contain hazardous material

  3. Evacuate exposures

  4. Reduce hazard potential

 

II. Personal Protective Equipment (1-2)

A. Structural Firefighter Protective Clothing

  1. Good thermal protection

  2. No chemical protection

  3. Not designed for hazardous materials emergency response

  4. Self-contained positive pressure breathing apparatus provides good respiratory protection

B. Chemical Protective Clothing

Note: Use of chemical protective clothing is generally the training level of the First Responder Operations Level

  1. Level A

      a. Fully encapsulated

      b. Utilizes SCBA

      c. Provides best protection from airborne chemicals

  2. Level B

      a. Provides good protection from materials that are not absorbed through the skin

      b. Utilizes SCBA

      c. Designed for splash protection

  3. Level C

      a. Provides good protection from materials that are not absorbed through the skin

      b. Utilizes cartridge respirator

          1) Require proper cartridge for hazard

          2) Required sufficient oxygen level

     c. Designed for splash protection

  4. Level D

     a. Little or no chemical protection

     b. May utilize cartridge respirator

     c. Street clothes

Note: A separate training session should be conducted to review the protective features offered by the personal protective clothing used by the department and to make sure that everyone knows how to wear it properly, especially the SCBA.

 

III. Basic Terms (1-3)

A. Ignition

  1. Flash point - point at which a material gives off sufficient fuel vapors that can be mixed with air to

      form an ignitable mixture

  2. Autoignition temperature - point at which fuel vapors when mixed with air will ignite without an

      ignition source

  3. Lower explosive limit - point below which there are insufficient vapors to form an ignitable mixture

B. Properties

  1. Vapor density - weight of vapor in relation to an equal volume of air with air having a weight of 1

  2. Specific gravity - weight of a solid or liquid in relation to an equal volume of water with water

      having a weight of 1

  3. Solubility - ability of a product to mix with another

 

IV. Control, Containment, and/or Confinement (1-4)

A. Absorption

  1. Use of absorbent materials such as sorbent to absorb materials

  2. Does not relieve chemical hazard

  3. Absorbent material also flammable

B. Damming

  1. Simple dam - designed to stop flow of water and product

  2. Underflow dam - designed to allow water to flow through lower portion of dam while trapping

      products on top of water (specific gravity of less than 1)

  3. Overflow dam - designed to allow water to flow over the top of the dam while trapping products

      on the bottom of the water (specific gravity greater than 1)

C. Diking - used to contain product in an area

D. Diverting - used to reroute product to a different area

E. Retention - creating a pool or basin where product can be collected for later removal

F. Vapor Dispersion - using water fog to disperse vapors away from ignition source or exposure

G. Vapor Suppression - generally applies to foam being used to suppress the mixture of fuel vapor with air

H. Dilution - generally using water to reduce hazard

Note: If time permits and the resources are available, the students could construct dams, dikes, and retention systems. The instructor may also want to review the operation of the foam equipment and foam fire attack.

 

V. Decontamination Procedures (1-5)

A. Emergency decontamination

  1. Use small hoseline with minimal pressure and flow

  2. Contain runoff

  3. May require removal of contaminated clothing