Air monitoring provides the following contaminant concentrations at the approxim

Question

Air monitoring provides the following contaminant concentrations at the approximate center of a fire scene in which acres of automobile tires are burning: Carbon monoxide @ 1700 ppm; Carbon dioxide @ 7000 ppm; and Sulfur dioxide @ 600 ppm. Ignoring synergistic effects between these gases, which individual concentrations are considered life-threatening to the EH&S or FS professional responding to the scene? What combustion products are produced when materials made from polyacrylonitrile smolder and burn?

Explanation / Answer

I think all of the levels are life-threatening... usually a few ppm for a lot of substances are serious.

polyacrylonitrile + O2 ---> Hydrogen cyanide, nitrogen gas, water vapor, carbon dioxide, and nitrogen dioxide.

Trinitrotoluene = TNT

it is insensitive to shock and friction, and will most likely not ignite itself. It also melts far below the temperature it will spontaneously explode at, so it can be melted and mixed with other explosives. It does not absorb or dissolve in water, so it could be used safely in wet environments.

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