breathing zone definition

breathing zone is defined as the area of space in each room of a fumigated structure located anywhere between the floor and ceiling.
breathing zone in relation to a person means the area represented by an imaginary hemisphere 300 mm in radius that—
breathing zone means any place where humans could come into direct contact with contaminated vapour, including indoor and outdoor environments that exist at the time of site investigation or have a reasonable potential to exist after a site investigation is complete.

More Definitions of breathing zone

breathing zone means a hemisphere of 300 millimetres radius extending in front of a person's face measured from the mid-point of an imaginary straight line joining the ears;
breathing zone means the area of a room in which occupants breathe as they stand, sit, or lie down.
breathing zone means a hemisphere of 300 mm radius extending in front of a person's face measured from the midpoint of an imaginary line joining the ears.
breathing zone means a zone described by a hemisphere of 300mm radius, extending in front and measured from the midpoint of an imaginary line joining the ears.