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radiation-contaminated sites that have been concealed by new construction, erosion of riverbanks and other slopes, and other construction-related activities. Ensuring radiation safety for the public demands that such hot spots be discovered and eliminated.

In preparing for work aimed at rehabilitating sites in the city of Moscow, it must be kept in mind that ignorance of what awaits construction workers carrying out site preparation work, especially at locations formerly used as industrial dump sites, not only could lead to significant expense but also could be a potential source of radioactive contamination for the surrounding area. Moscow currently has about 2,000 facilities in operation that work with ionizing radiation sources and radioactive substances. However, the city has no comprehensive database about enterprises that previously worked with ionizing radiation sources but closed or changed orientation as a result of economy policy changes during the past 15 years.

From the above-mentioned points, we may conclude that systematic data are needed on a citywide scale regarding the locations of potentially hazardous radiation-contaminated sites. Therefore, it is proposed that a program be developed to conduct a comprehensive radiation study of facilities where work with radioactive substances has been carried out since the late 1980s. Such a program should also include studies of known and suspected sites of soil contamination at specific facilities and other areas of the city.

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