Hmmm, maybe a master list does exist somewhere, but when my firm went for registration, we had to identify our own. 4.3.1 states that the organization shall establish ... procedure(s) to identify the aspects of its activities ... in order to determine those which ... can have significant impacts. I am not an expert in 14001, but I am quite certain that each company has to pretty much come up with their own list. The "logic" of 14001 is that you "start" by listing your aspects, determine the impacts, define which impacts are "significant", make objectives and targets to address these significant impacts, and on and on.
Because every firm has its own unique processes and systems, it would be difficult to make a master list. Might I suggest, however that you might find some aspects having significant impacts by looking at your maintenance department, how do you handle waste (solid, liquid) and gas emissions, hydraulic oil, solvents, spills, sewers, your building, your grounds. Are your processes "dirty", "noisy" , "smelly", etc. What is your utilisation of utilities: electrical, water, etc. Just a few ideas. Good luck.