222Rn (Bq/L) 214Pb (Bq/L) 214Bi (Bq/L) Radon Exhalation rate (Bq/h)
1019.16 1.36 1.24 1.40 x10-3
827.824 1.46 1.55 1.12 x10-3
1163.28 0.495 0.48 2.24 x10-3
540.46 0.94 0.97 1.04 x10-3
Table 4: Activity concentrations of Radon (Bq/L) and its progenies (Bq/L) and exhalation rate (Bq/h).