HAZMAT Air Supply Consumption
The duration of the air supply must be considered before planning any HAZMAT Level 3 SCBA-assisted work activity. The anticipated operating time of an SCBA is clearly indicated on the breathing apparatus. This designated operating time is based on a moderate work rate, e.g., some lifting, carrying, and/or heavy equipment operation.
In actual operation, however, several factors can reduce the rated operating time when planning an SCBA-assisted work mission, the following variables should be considered and work actions and operating time adjusted accordingly:
• Work rate. The actual in-use duration of SCBAs may be reduced by one-third to one-half during strenuous work, e.g., drum handling, major lifting, or any task requiring repetitive speed of motion.
Suit/Ensemble Permeation and Penetration
The possibility of chemical permeation or penetration of CPC ensembles during the work mission is always a matter of concern and may limit mission duration. Possible causes of ensemble penetration are:
Also, when considering mission duration, it should be remembered that no single clothing material is an effective barrier to all chemicals or all combinations of chemicals, and no material is an effective barrier to prolonged chemical exposure.
Other HAZMAT Level 3 Links of Interest
©Copyright 2013 hazmatlevel3.com, All Rights Reserved