If a waste generator has an extremely or acutely hazardous waste, there is a limit to the amount that they can store in the lab at one time. One quart of extremely or acutely hazardous waste can be stored before disposal is required. When one quart or more of extremely or acutely hazardous waste accumulates, the waste must be disposed of within three (3) days of reaching that point. If you have less than one quart, you have 90 days to accumulate the waste (same as hazardous chemical waste).
It is suggested that if you are accumulating a waste that falls into this category, you should dispose of it before it reaches the one quart limit. This way you will not have to be restricted by the three day maximum time limit.