Hazardous Waste Management

Calculating Your Monthly Hazardous Waste Generation

Counting Hazardous Waste

You know you generate hazardous waste at your facility and you want to keep your disposal costs down. Well, then, you have to keep down the amount of hazardous waste you have on-site each month. If you are a large quantity generator (LQG), your responsibilities and costs will be greater than if you are a small quantity generator (SQG). You’ll have even fewer requirements to follow if you are a conditionally exempt small quantity generator (CESQG).

In some instances, it may be possible to control those unusual circumstances that could cause you to exceed your monthly generation limitation. For example, an SQG may avoid being an LQG one month by scheduling its annual plant maintenance in a week that is in two different months. In the year 2015, for example, the last week in June begins on Monday the 29; Tuesday is also in June, but Wednesday, Thursday, and Friday are the first 3 days of July. If the SQG began its plant maintenance for the week beginning June 29, some of the hazardous wastes generated that week would be counted in June, with the rest counted in July.

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This table shows the volume of hazardous waste that you can have at your facility depending on your generator class, according to EPA’s hazardous waste regulations.  

 Maximum/Minimum Monthly Volumes, Each Class of Generator

 Class of Generator





Waste Volumes

1,000 kg or more of hazardous waste a month; more than 1 kg of acute hazardous waste a month

More than 100 kg but less than 1,000 kg of hazardous waste a month; up to a total of 1 kg of acute hazardous waste a month

Up to 100 kg of hazardous waste a month; up to a total of 1 kg of acute hazardous waste a month; up to 100 kg of any residue or contaminated soil, waste, or debris from the cleanup of a spill, onto land or water, of acute hazardous waste a month

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The EPA hazardous waste regulations, for some reason, show the generated quantities in kilograms (kg). The equivalent quantities in pounds (lb) are:

  • 1 kg = 2.2 lb
  • 100 kg = 220 lb
  • 1,000 kg = 2,205 lb


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