In developing an S.O.P. for air monitoring in a Permit Required Confined Space, which two factors should be included?

When developing a Standard Operating Procedure (S.O.P.) for air monitoring in a Permit Required Confined Space, it is crucial to address both the placement of the blower and the weather forecast. The placement of the blower is significant because it can affect air circulation within the confined space, ensuring that any hazardous gases are effectively removed and that fresh air is introduced. Proper placement will optimize the ventilation, which is critical in maintaining safe air quality and preventing the build-up of toxic or flammable gases.

In addition to the blower placement, considering the weather forecast is essential. External weather conditions can influence the air quality inside the confined space. For example, certain weather patterns can lead to changes in barometric pressure or humidity levels, which may impact how gases behave or disperse. Awareness of the weather conditions can help in predicting potential hazards and planning the monitoring process more effectively.

By incorporating these two factors into the S.O.P., operators and safety personnel can ensure that monitoring procedures are robust and take into account the dynamic nature of the environments where confined space work occurs.