Table 11283 Removable External

RADIOACTIVE CONTAMINATION: WIPE LIMITS

Maximum Permissible Limits

Contaminant uCi/cm2 dpm/cm2

Beta/gamma-emitting radionuclides: all radionuclides with half-lives less than ten days; natural uranium; natural thorium; uranium-235; uranium-238; thorium-232; thorium-228 and thorium-230 when contained in ores or physical concentrates 10~5 22

All other alpha-emitting radionuclides 10~6 2.2

uCi/cm2 = microcuries per square centimeter.

dpm/cm2 = disintegrations per minute per square centimeter.

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