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

Station Location

Exposure Rate (µR/hr)

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.