The Department of Energy’s Office of Price-Anderson Enforcement at the Hanford Tank Farms issued a Preliminary Notice of Violation (PNOV) citing violations of CH2M Hill Hanford Group “involving four radiological and operational events occurring during 2003 and 2004. The events included (1) the June 2003 multiple personnel contamination event …; (2) the November 2003 Technical Safety Requirement violation during a cross-site waste transfer; (3) the November 2003 valve positioning error during S-112 waste retrieval operations; and (4) the July 2004 extremity exposure during thermocouple removal activities.”