Page 235 - CHEF Guide

Impact Evaluation

Thermal Contact – Thermal burns are skin injuries caused by excessive heat, typically from contact with hot surfaces,
hot liquids, or breathing hot vapors. For Thermal or Chemical Burns, human harm depends upon the fraction of body area
damaged - roughly 10% lethality at 25% body area and 50% lethality at 50% of body area receiving 2 or 3 degree burns
nd
rd
(Table 14-3 and Figure 14-3).
Table 14-3 Scald injury prevention

[71]
American Burn Association - Community Fire & Burn
Air temperature hazard limit curve. Heath and Safety Executive, “Methods of approximation
and determination of human vulnerability for offshore major accident hazard assessment.” Prevention Programs, “Scald Injury Prevention”

Ambient Temperature (Celsius)
[72]
Figure 14-3 Air temperature hazard limit curve

 Exposure to 80-100 C may be a reasonable “threshold” Level of Concern for exposure to hot vapor
 Exposure to 60-70 C may be a reasonable “severe impact” Level of Concern for exposure to hot liquid.

Asphyxiation is the deprivation of oxygen that can result in unconsciousness and often death (Table 14-4).

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