The "point of generation" refers to the location where wastes initially accumulate and is under the control of the operator of the waste-generating process. Identifying the point of generation is sometimes difficult, due to the many site specific factors that affect how and when the waste is considered to be generated. For this reason, when a generator is having difficulty identifying the point of generation, it is always a good idea to obtain a site specific determination from the state or implementing agency.

There is no time limit imposed upon waste stored at the point of generation. Up to 55 gallons of hazardous waste or one quart of acutely hazardous waste may be stored at or near the point of generation for any period of time ( 40 CFR §262.34(c) ). Although 55 gallons of waste is allowed by the regulations to be stored in the laboratory -- THIS IS NOT A SAFE PRACTICE.

Although there is no regulatory time limit on hazardous waste, in quantities <55 gallons, stored in the laboratory, there are other requirements which do apply.

Hazardous waste containers in the laboratory must be marked "Hazardous Waste" or with words that identify the contents of the container.