National Museum of Nuclear Science & History
W. G. Butler worked for the J.A. Jones Construction Company.
Before the war Oswald Greager was a high-ranking DuPont chemist. He took leave from DuPont in 1942 to join the Army's Chemical Warfare Service.
Appears in the 1944 Hanford Telephone Directory as “Petersen” and the 1945 Directory as “Peterson”.