Following the 1966 Palomares B-52 crash , the Savannah River Site received contaminated soil from the environmental clean up and remediation . Soil with radiation contamination levels above 1.2 MBq/m2 was placed in 250-litre ( 66 U.S. gallon ) drums and shipped to the Savannah River Plant for burial . A total of 2.2 hectares ( 5.4 acres ) was decontaminated by this technique , producing 6,000 barrels . 17 hectares ( 42 acres ) of land with lower levels of contamination was mixed to a depth of 30 centimeters ( 12 in ) by harrowing and plowing . On rocky slopes with contamination above 120 kBq/m ² , the soil was removed with hand tools and shipped to the United States in barrels
1966 Palomares B-52 crash
1966 Palomares B-52 crash
Savannah River Site