By Annette Cary

HANFORD, Wash. _Hanford workers began retrieving radioactive and hazardous chemical waste from Tank C-110 this week.

They're hoping it marks the first sustained effort to retrieve solid waste from leak-prone underground tanks since late July 2007 when a spill of waste stopped operations.

Waste left from the past production of plutonium for the nation's nuclear weapons programs is being pumped from single-shell tanks into 28 sturdier double shell tanks to await treatment and disposal.

Read the full story at tri-cityherald.com.