Container Management Requirements

First, you should have only one "active" bottle to collect hazardous waste from each waste stream. Active means that the bottle is empty or only partially full and is intended to hold additional waste.

This is an issue because some labs accumulate their waste into a small bottle in the hood and then transfer the waste in that bottle to a larger carboy on the floor. This "double transfer" is sometimes easier and safer than transferring directly into the larger carboy each time.

However, double transfer is allowed only if the small bottle is emptied at the end of each day! If the smaller bottle and the bigger carboy are both used for waste storage longer than a day, it is considered "double accumulation". Double accumulation is illegal.

The smaller bottle for the first transfer should not be labeled as waste. But the "active" bottle or carboy must have a UW Hazardous Waste label.

This rule doesn't apply to your full waste containers that you are done filling. It is okay to accumulate more than one full waste bottle per waste stream, as long as the total volume per waste stream is not over 55 gallons.