Excess amounts of waste and/or unneeded material are not to be allowed to accumulate.

• Waste generated in the process of conducting research or other activities (e.g., spent solvents) will be removed on a routine basis. 
• In no case, will an activity allow more than 50 gallons (~200 kg) of waste to accumulate (no more than 1 quart (~1 kg) of a Highly Toxic Waste) nor will any waste container be retained for longer than one year.
• At the end of any project or prior to the departure of an individual, all research products and other material shall be clearly identified and disposed of.

In addition:

Each laboratory/activity will conduct at least an annual physical survey of their area and dispose of unneeded/expired material. Special attention will be given to the following:

• Refrigerators and freezers.
• Ethers and other peroxide forming substances.
• Materials that become more dangerous due to evaporation such as sodium, organo-metallic compounds in solvents, or picric acid.

And, a responsible individual (e.g., Primary Investigator or Shop Foreman) will review the biannual Right to Know Inventory and attest to the fact that the materials retained are required.  Records will be maintained of these reviews.