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.
AIR IS PRESENT IN SOIL. There are animals that live in water and there are animals that live in the soil, under the surface. These animals also require air to live. The following activity demonstrates the presence of air in the soil. Dig out a small lump of soil from your garden. Place this lump of soil in a small vessel. Pour a small amount of water on it. Bubbles are observed coming out of the soil. This is because the water particles displaces the air, present between the soil particles and the air rises and escapes from the surface as bubbles. This air is used by insects such ants, beetles and earthworms to respire.