Monitoring dates	Minimum (µSv/h)	Maximum (µSv/h)
Range of past usual value	0.020	0.105
January 31 (Tue.)	0.026	0.038
January 30 (Mon.)	0.024	0.026
January 29 (Sun.)	0.025	0.038
January 28 (Sat.)	0.026	0.039
January 27 (Fri.)	0.025	0.035
January 26 (Thur.)	0.026	0.027
January 25 (Wed.)	0.025	0.027
January 24 (Tue.)	0.026	0.040
January 23 (Mon.)	0.026	0.040
January 22 (Sun.)	0.025	0.026
January 21 (Sat.)	0.025	0.028
January 20 (Fri.)	0.025	0.027
January 19 (Thur.)	0.025	0.027
January 18 (Wed.)	0.024	0.026
January 17 (Tue.)	0.024	0.028
January 16 (Mon.)	0.025	0.044
January 15 (Sun.)	0.024	0.025
January 14 (Sat.)	0.024	0.043
January 13 (Fri.)	0.025	0.027
January 12 (Thur.)	0.023	0.036
January 11 (Wed.)	0.023	0.030
January 10 (Tue.)	0.024	0.036
January 9 (Mon.)	0.025	0.032
January 8 (Sun.)	0.025	0.028
January 7 (Sat.)	0.024	0.030
January 6 (Fri.)	0.024	0.045
January 5 (Thur.)	0.026	0.035
January 4 (Wed.)	0.026	0.035
January 3 (Tue.)	0.026	0.032
January 2 (Mon.)	0.025	0.028
January 1 (Sun.)	0.025	0.027
March 13 (Sun.) to Dec 31 (Sat.)	0.027	0.064