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Table 3 Office location and distribution of radon level

From: Radon level in a Nigerian University Campus

Office location Permissible level N (%) Risky level N (%) Critical level N (%) Total
Basement 12 (85.7) 1 (7.1) 1 (7.1) 14
Ground floor 27 (96.4) 1 (3.5) 0 (0.0) 28
First floor 20 (100) 0 (0.0) 0 (0.0) 20