They can last for a few hours up to weeks at a time. Also within this time frame after quitting, convulsions or seizures can occur, which is the point at which alcohol withdrawal can become dangerous if not medically treated. The symptoms may progress to delirium tremens (DT's) after three to five days without alcohol.
I would like to add that in US most of Instrument Ait pressure is 20-25 psi in the system and Plant (Service) Air pressure is 80-120 psi (about 7 atm). Both system require dryers, filters and some other equipment to do air conditioning.
Soil air differs from the atmosphere above the soil in that it usually contains 10 to 100 times as much carbon dioxide, slightly less oxygen, and is saturated with water vapor. Soil Air Movement: Air enters and leaves the soil through cracks in the soil and through the pores at the surface of the soil.