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Legend (Hazards/RadonLevelsByRockType)

Indoor radon potential (pCi/L) (0)
0.0 - 2.7 0.0 - 2.7
2.71 - 4.0 2.71 - 4.0
4.01 - 8.0 4.01 - 8.0
8.01 - 16.00 8.01 - 16.00
16.01 - 25.30 16.01 - 25.30