April 24, 2001

Issued to CH2M Hill Hanford Group, Inc., related to Nuclear Safety Management at the Hanford Site Tank Farms.

On April 24, 2001, the U.S. Department of Energy (DOE) issued a nuclear safety Enforcement Letter to CH2M Hill Hanford Group, Inc. for failures to perform technical safety requirements for gas monitoring and failure to enter a Limiting Condition for Operation associated with a ventilation system failure at the Hanford Tank Farms.