The Army Corps of Engineers is beginning a study of hundreds of residential properties near Kingman that may have been contaminated during World War II.
The Corps plans to investigate about 284 residential lots starting next month in a process that could last two years.
They'll be looking at places that were used as shooting ranges during the war. Army officials say more than 36,000 soldiers trained at 15 skeet ranges in the area between 1943 and 1946.
The Kingman Daily Minor reports soldiers used clay pigeons that may have contained toxic material, and shot lead bullets on the sites.
An inspection in 2010 found 59 contaminated properties. The Corps of Engineers says more funding will be needed if it finds further cleanup is required.