CH-TRUContract-Handled Transuranic Waste
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Depending on the level of radioactivity, the waste was packaged for disposition in lower-level contact-handled waste containers (CH-TRU) or higher-level remote-handled waste containers (RH-TRU).
Both the RH-TRU and CH-TRU disposed of at the WIPP consist of tools, rags, protective clothing and other materials "contaminated with radioactive elements that have atomic numbers greater than uranium (transuranic)," DOE explained.