Average gamma exposure rates, fourth quarter, 2017, from HPIC network

Average gamma exposure rates, fourth quarter, 2017, from HPIC network.

Station Location	Exposure Rate (µR/hr)
Station Location	Quarterly Average	± 2 SD
On-site Locations
Base of Howe	15.7	1.4
Big Lost River Rest Area	15.1	1.2
Rover	15.5	1.4
Sand Dunes Tower	13.2	0.9
Boundary Locations
Atomic City	12.0	5.8
¹Big Southern Butte	14.6	1.8
Howe Met Tower	13.0	0.9
²Monteview	--	--
Mud Lake / Terreton	14.4	1.4
Distant Locations
Fort Hall	12.5	1.2
Idaho Falls	12.6	1.4
¹Big Southern Butte has experienced multiple electronic malfunctions in this quarter. Corrections for these anomalies can be applied when necessary by the data analyst. This location has experienced larger than normal electronic interference this quarter. The reported values for this location without these corrections are: 19.5 uR/hr average exposure rate, and a standard deviation of 84.4. Further justification for removing these anomalies from the data set includes the co-located EICs result of 12.2 ± 2.0 µR/hr average exposure rate for the same quarter at the same location (see ‘Big Southern Butte’ in Table 8). ²No data available for this location for fourth quarter 2017 due to electronic malfunctions in instrumentation.