Availability and Solicitation of Public Comments on Interagency Steering Committee on Radiation Standards' Reports on Radioactivity in Sewage Sludge and Ash

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This Federal Register notice announces the availability of three reports, prepared by the Sewage Sludge Subcommittee of the Interagency Steering Committee on Radiation Standards (ISCORS), addressing radioactivity in sewage sludge and ash. The first report, "ISCORS Assessment of Radioactivity in Sewage Sludge: Radiological Survey Results and Analysis," summarizes the information on radioactivity found in samples of sewage sludge and ash from 313 publicly owned treatment works (POTWs). This report is being issued as a final document, since it only presents data that has already been collected. The second report, "ISCORS Assessment of Radioactivity in Sewage Sludge: Modeling to Assess Radiation Doses," assesses the potential levels of radiation doses to people by modeling the transport of radioactivity from sludge into the local environment. The report also provides a complete description and justification of the dose assessment methodology. The third report, "ISCORS Assessment of Radioactivity in Sewage Sludge: Recommendations on Management of Radioactive Materials in Sewage Sludge and Ash at Publicly Owned Treatment Works," recommends further actions that may be taken by a POTW oper