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  5. How to use Table 3 – Initial Isolation and Protective Action Distances for Large Spills for Different Quantities of Six Common TIH (PIH in the US) Gases

How to use Table 3 – Initial Isolation and Protective Action Distances for Large Spills for Different Quantities of Six Common TIH (PIH in the US) Gases

Table 3 lists Toxic Inhalation Hazard materials that may be more commonly encountered.

The selected materials are:

The materials are presented in alphabetical order and provide Initial Isolation and Protective Action Distances FOR LARGE SPILLS (more than 208 liters or 55 US gallons) involving different container types (therefore different volume capacities) for day time and night time situations and different wind speeds.

Estimating Wind Speed and Environmental Clues

mph km/h Wind Description Specifications
< 6 < 10 Low wind Wind felt on face; leaves rustle; ordinary vane moved by wind
6 - 12 10 - 20 Moderate wind Raises dust, loose paper; small branches are moved
> 12 > 20 High wind Large branches in motion; whistling heard in telephone wires; umbrella used with difficulty
Date Modified:
2016-08-25