Page 730 - Radiation Safety
P. 730
ENVIRONMENTAL MONITORING
MONITORING PARAMETERS
3. Surface contamination, consider contaminate if
• Alpha emitter > 0.04 Bq/cm 2
• Others > 0.4 Bq/cm 2
4. Airborne contamination, must be monitor in dusty working
environment, dust sampled and analyzed for gross alpha and
gross beta activity for determination of U-238 and Th-232. It is
considered contaminate if
• Uranium > 0.01 Bq/m 3
• Thorium > 0.001 Bq/m 3