Results of the independent radiological verification survey at 826 Black Oak Ridge Road, Wayne, New Jersey

Abstract

In January 1981 the NRC measured direct radiation levels and radionuclide concentration in soils on the W.R. Grace property. The results of the survey indicated radiation levels ranging from 10 to 1000 microroentgens per hour (..mu..R/h) and /sup 232/Th concentrations as high as 1200 picocuries per gram (pCi/g) of soil. Therefore, the state of New Jersey requested an aerial radiological survey, which was conducted in May 1981. This survey identified elevated radiation levels at 1 m above the surface with average exposure rates greater than 120 ..mu..R/h. It was determined that a more detailed radiological survey of the plant site was needed to provide information on the extent and degree of the contamination. A radiological survey at the processing facility was performed in July 1982 by Oak Ridge Associated Universities (ORAU) for the NRC, and a similar survey was conducted in 1982 by the New Jersey Department of Environmental Protection (NJDEP). Because it was noted that elevated radiation levels extended onto the property adjacent to the W.R. Grace Site on the south (a school bus maintenance facility and depot), this property at 826 Black Oak Ridge Road was surveyed by ORAU. These surveys indicated surface radionuclide concentrations greater than thosemore » acceptable under US Department of Energy (DOE) remedial action guidelines. 11 refs., 3 figs., 6 tabs.« less