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Preliminary Notice of Violation, CH2M Hill Hanford Group, Inc. - EA-2006-06

November 16, 2006

Issued to CH2M Hill Hanford Group, Inc., related to Radiological Contamination Events at the Hanford Site Tank Farms

On November 16, 2006, the U.S. Department of Energy issued a Preliminary Notice of Violation (EA-2006-06) to CH2M Hill Hanford Group, Inc. for violations of 10 C.F.R. Part 835 related to multiple events and assessments at DOE's Hanford Site Tank Farm including a September 2005 Tank C-202 Mobile Retrieval System multi-personnel contamination event; a March 2006 ER-311 catch tank camera removal radiological event; and additional radiological contamination events that occurred between 2003-2006 as they relate to quality improvement issues discussed in various DOE and CH2M Hill Hanford Group assessment and event reports.