Waste Designation Decision Matrix - P or U Waste Determination
This matrix is provided as an assistance tool. It cannot be used as a substitute for following applicable city, state, and federal laws.
|Is the waste listed in the P or U lists in 40 CFR 261.33?|
Look to the P and U lists only when the waste chemical is unused. These are ONLY discarded, expired, or off-specification chemical products. The waste must contain the chemical as its sole active ingredient. If you discard any of these listed chemicals, before use, the waste is hazardous.
Review the P and U lists. Make a note of the appropriate code for the waste you have for use later in the decision matrix.
Some examples of "unused" waste chemicals include:
- A bottle of expired hydrofluoric acid (U134) in any concentration.
- A drum of acetone (U002) that is no longer useful in your current process.
- An old, unused laboratory quality assurance standard consisting of 1,000 ppm sodium cyanide (P-106) mixed with water is discarded.