L15K (REMOVED)

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Station Close-Out Report
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Service Plan

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2021_05_15 Removal (R. Bierma, K. Schroeder)
USArray Station Removal Report Form V1.5
STATION CODE: TA.L15K
STATION LOCALE DESCRIPTION: Ungalak Mountain, AK
STATION REMOVAL LOG DATE: 5/15/21
STATION/SENSOR DOWN TIME (UTC): 22:45
REMOVAL DESCRIPTION: Sensor removed. Casing cut off below grade and capped. Hut removed.
ACTIONS TAKEN: The station was powered down after collecting a final screenshot. Sensor issued "remove" command, log file captured (attached). Sensor orientation measured with Octans on top plate. Sensor pulled free by hand. After the instrument and bags were removed, the metal casing was cut off 6” below grade using the die grinder. The hut, conduit and all remaining materials were slung back to Bethel.

LAT/LONG OF SENSOR HOLE: N 61.67795, W -161.48689, WAAS enabled
Distance and azimuth to Hut from Sensor hole: 187", 140 degrees
Wind turbine: [not present]
CASING CONDITIONS: The casing was in good condition with no damage to the wellcap or conduit. No evidence of frost jacking and no water present in the casing.
SEISMOMETER REMOVAL: 1/3 difficulty. One person using the jack to break tension with easy-moderate pull thereafter.
Bottom of wellcap to grade level: 5”

SENSOR ORIENTATION MEASUREMENTS:
Measured with OCTANS Unit: 0.1 degrees (OCTANS s/n 34531211, b/c 5008931)
Orientation at install: 0.02 degrees using OCTANS

COMMENTS:
Soil temperature sensor was removed. Data loggers labeled and collected for later download.
Vaisala still had active connection to EP

REMOVED:

Q330 TagId – 785; bc – 5000017
Baler 44 sn – 18470; bc – 5008095
STS5A sn – 130760; bc – 5015435
VIE bc – 5009207
QEP sn – 117186; bc – 5003627
infra SETRA sn – 4719283; bc – 5012381
infra NCPA sn - H112080466; bc – 5012182
Regulator Board sn – 231; bc – 5009869
BGAN Modem sn – 353938030194801; bc – 5018286
BGAN SIM sn – 898709916412350479
XI202 sn – 720; bc – 5018242
WXT520 sn – M2810698; bc – 5017740
Power sys 1.6.4
Charge Controller bc – 5016799
LiFePO4 sn – 5345; bc – 5017316
LiFePO4 sn – 5395; bc – 5017353
LiFePO4 sn – 5405; bc – 5017363
LiFePO4 sn – 5857; bc – 5018059
LiFePO4 sn – 5861; bc – 5018062
LiFePO4 sn – 5750; bc – 5017961

DAMAGE: None

LEFT AT SITE: cutoff casing below grade

VISITORS:
1. Bierma
2. Schroeder (Recon)
3. Elsass (Alpine)
4. Bue (Alpine)
2020_07_15 Service (R. Bierma, J. Miner)
USArray Station Service Report
Form V1.0

STATION CODE:
TA.L15K

STATION Locale Description:
Ungalak Mountain, Alaska

STATION SERVICE LOG DATE:
20200715

STATION/SENSOR DOWN TIME (UTC):
Station offline for ~5 minutes, 14:40 for media swap

SERVICE DESCRIPTION:
Trouble shoot BGAN signal quality.
UPON ARRIVAL:
Station in good condition, a bear had separated the conduit from the LB at the hut but the sensor cable was intact. The BGAN signal was on narrow beam, but signal strength was 60-62.
ACTIONS TAKEN:
Verified the station configuration. Tested a new cable for the BGAN system with an increase in 7 signal strength to 67.1.
Baler media swap.
Soil temperature sensor batteries changed and data downloaded.
Added bird spikes to Vaisala.

EQUIPMENT REMOVED:
NA
EQUIPMENT INSTALLED:
NA

COMMENTS:
No other noteworthy issues or obvious sign of corrosion on the BGAN cable.
Door locked and taped prior to departure.

VISITOR:
1. Bierma
2. Miner
3. Bue (Alpine Air)
ON NEXT VISIT:
n/a
CHANGES AFFECT INSTRUMENT RESPONSE:
n/a
2017_05_28 Install (R. Bierma, M. Sanders)