The Office of Environmental Management (EM) tank waste program consists of safely storing of 90 million gallons of radioactive liquid waste at the Savannah River Site (SRS), Idaho National laboratory (INL) and the Office of River Protection (ORP) at Hanford, Wash. Of the approximately 90 million gallons, 36 million gallons (250 x 10 6 Ci ) is stored at SRS, approximately 56 million gallons ...