Underground laboratory Mean  activity
LNGS (3800 m w.e.) 

HALL A                        (26 ± 1)Bq/m3

HALL B                        (21 ± 1)Bq/m3

HALL C                        (87± 5)Bq/m3
LSM    (4800 m w.e.)  
LSC    (2500 m w.e.)  HALL A                        (66.2 ± 0.4) Bq/m3
Boulby  (2805 m w.e.)  
Pyhäsalmi  (3960 m w.e. )