When space allowed, they stored drums on their sides with the bungs (plugs) at the 3 and 9 o'clock positions . This ensured the seals were submerged in oil, preventing air and moisture from being "inhaled".
They used desiccant breathers to filter out dust and moisture every time the pump was used. Chapter 4: The Payoff buy oil by the drum
To actually get the oil out, they had to invest in a rotary hand pump or an air-powered dispensing system. When space allowed, they stored drums on their