Home LMS THMG160 – Propane Hot Wash, Part II

THMG160 – Propane Hot Wash, Part II


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    1. (d)  Predict the likely behavior of released materials and their containers when multiple materials are involved
      1. Using the info we had we were able to draw a few basic deductions and predictions.
        1. We didn’t feel that there was any danger of the tanks failing. They all seemed to be in good shape. Based upon our assumption we know the propane would not act like natural gas and go up into the air and dissipate.
        2. If that were the case we would have nothing to really worry about. It would midgate itself. But we are dealing with a product that is much heavier than air. So we predicted it would come out hug the ground.
        3. (e)  Estimate the size of an endangered area using computer modeling, monitoring equipment, or specialists in this field
          1. Our major concern was the leak from each tank at the treads. Knowing that our most likely culprit is propane. How it may not seem like a lot. You come across a tank that is pushing product threw the threads. But imagine one of these leaks then make it 10 times worse. We had a concern that this product would come out of the container and collect on the ground and flow to a source of ignition.
            1. Now think about what we have. We are in a residential neighborhood. There are houses with basements all over. And they are not far apart. They are only separated by 10 feet at the most. Barely enough to get a car between them.
            2. Another concern for sources of ignition are the manholes in the street. These manholes dont are not just covers that lead to sewer but most major utilities. So there are switches and transformers and all types of electrical sparks going on down there. So even as we planned on how to deal with these, This was a major factor we kept in the back of my head.
            3. A third source of ignition was the smoldering guard that was only 10 feet away from the cylinder staging area. This was the garage that had the fire. So naturally anything that is still hot in here can be a source. Now the ground between the house and the garage was relatively flat. I don’t think looking at it we could have determined which way the vapors would have gone.




  1. (2)  Plan a response within the capabilities of available personnel, personal protective equipment, and control equipment by completing the following tasks:
    1. (a)  Describe the response objectives for hazardous materials/WMD incidents
      1. Go home safe
        1. Use our meters to keep us safe
        2. Inspect the cylinders before we move them
      2. Protect life and property
        1. Check areas that the product could be
          1. Use our knowledge of chemical properties
            1. Propane sinks so we need to check low lying area
              1. Basements are a must. Why?
              2. Manhole covers
              3. ditches


    1. (b)  Describe the potential response options available by response objective
      1. Mitigate the hazard
        1. For us the only option is to burn.
        2. Why burn
        3. What we use to burn normally
        4. How we set up the burn
        5. What we did this run for the burn
    2. (c)  Select the personal protective equipment required for a given action option
      1. Bunker gear
        1. Scba, where and when do we use it
    3. (d)  Select a technical decontamination process to minimize the hazard
        1. None and explain why
    4. (e)  Develop an incident action plan for a hazardous materials/WMD incident, including a site safety and control plan, consistent with the emergency response plan or standard operating procedures and within the capability of the available personnel, personal protective equipment, and control equipment
      1. Explain how we ended up with our set up
  1. (3)*  Implement the planned response to favorably change the outcomes consistent with the standard operating procedures and site safety and control plan by completing the following tasks:
    1. (a)  Perform the duties of an assigned hazardous materials branch or group position within the local incident management system (IMS)
    2. (b)  Don’t, work in, and doff personal protective clothing, including, but not limited to, both liquid splash– and vapor–protective clothing with correct respiratory protection
    3. (c)  Perform the control functions identified in the incident action plan
      1. Charged hose line
      2. Person positioned at shut off valves
      3. Standby with flares incase barrel went out
    4. (d)  Perform the decontamination functions identified in the incident action plan
      1. none
  2. (4)  Evaluate the progress of the planned response by completing the following tasks:
    1. (a)  Evaluate the effectiveness of the control functions
    2. (b)  Evaluate the effectiveness of the decontamination process
  3. (5)  Terminate the incident by completing the following tasks:
    1. (a)  Assist in the incident debriefing
    2. (b)  Assist in the incident critique
    3. (c)  Provide reports and documentation of the incident
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