Classifications of Hazardous Materials
What class do corrosives belong to?
What is Class 8: Corrosives?
What are initial safety risks to evaluate?
Potential secondary explosions, structural damage, and hazards from debris.
Why is it important to document investigation steps?
To maintain a clear record of actions taken and findings.
What details should be recorded in a log?
Dates, times, scene descriptions, activities conducted.
What is an evidence recovery log?
A log detailing item numbers, descriptions, locations, and collectors of evidence.
What are Division 5.1 materials?
Materials that enhance combustion
Why is securing communication devices important?
To prevent triggering explosions.
What should you discuss with responders before evidence collection?
The scope of the investigation, Evidence handling, Potential witnesses or victims, specific items or areas of interest for evidence collection, and safety measures.
How should you document witness relationships?
By recording their connection to the scene and any pertinent information.
Why is it important to photograph evidence?
To create a visual record of the evidence as it was found before any handling.
What is the flash point of flammable liquids?
Flammable Liquid: Flash point less than or equal to 60°C/140°F.
Combustible Liquid: Flash point between greater than 60°C/140°F.
What does assessing the scene involve?
Understanding the situation and identifying hazards.
What is needed in the introduction and safety assessment?
Identification to the incident commander and ensuring secondary device searches.
Who should be prioritized for interviews?
Witnesses who have direct knowledge of the incident, first responders, bystanders, individuals with expertise, and victims.
How should evidence be documented?
By creating a detailed log and ensuring items are labeled and stored properly.
What distinguishes Class 2.1 gases?
Flammable gases that ignite easily.
Describe a safety measure for responders.
Park safely away from the scene, use protective gear (PPE), establish a secure perimeter, Ensure proper communication protocols, and conduct a risk assessment.
What should you do during a scene walkthrough?
Assess the area and locate explosion sources for evidence collection.
Why is visual documentation important?
To provide evidence of the scene's condition before any items are disturbed.
How do you control scene contamination?
By using clean protective clothing and following strict evidence handling procedures.
What are Division 1.1 explosives?
Explosives with mass explosion potential affecting most of the load.
What is the first step for first responders?
Evaluate the scene and identify safety risks.
What is the purpose of maintaining scene integrity?
To avoid contaminating evidence and to ensure accurate investigation
What should be included in written documentation?
A record of all activities, including descriptions of the scene and actions taken.
What should the evidence team consist of?
Bomb disposal technicians, forensic specialists, medical examiners, and safety specialists.