1. Moab UMTRA Uranium Mill Tailings Remedial Action
July, 2018
looking northeast,
May, 2018 image courtesy of DOE
Second Quarter Review for Steering Committee
by Lee Shenton
Grand County UMTRA Liaison

2. Highlights FY18 funding increased $2.9 mil to ~$38 mil
FY19 funding ~$42 mil by House, pending Senate passage
58% of tailings removed
Defensive wells still protecting river
4 days x 34 railcars x 4 containers x 38 tons average as of Nov, 2012
Observations provided by Grand County UMTRA Liaison on behalf of the Moab Tailings Project Steering Committee, as established by Grand County Resolution 2970A.

3. Non-Defense Environmental Small Projects
Five other DOE
Non-Defense Environmental Small Projects
ARRA*
ARRA*
ARRA*
* American Recovery and Reinvestment Act of 2009, aka “Stimulus”
Tailings shipment and funding information provided by Moab UMTRA. Other observations provided by Grand County UMTRA Liaison on behalf of the Moab Tailings Project Steering Committee, as established by Grand County Resolution 2970A.

4. 201,000 tons per month with ARRA
58% of Tailings Removed
Assumed 40,000 tons for July, 2018
Shipments curtailed Dec 2012 – Feb 2013 due to funding cuts
39,400 tons per month since workforce reduced
Shipments
interrupted
by rock slide
201,000 tons per month with ARRA
Tailings shipments suspended due to lack of adequate funding.
Tailings shipment and funding information provided by Moab UMTRA. Other observations provided by Grand County UMTRA Liaison on behalf of the Moab Tailings Project Steering Committee, as established by Grand County Resolution 2970A.

5. Main Project Goals Move tailings away from Colorado River
Protect river by intercepting ground water contaminants
Remediate vicinity properties (VP)
Reclaim project sites at Moab and Crescent Junction
UNOFFICIAL PROJECTION by Liaison, actual end dates depend on future funding levels
ACTIVE REMEDIATION
1 remaining of 15
Total project costs are estimated at about $1 billion
At the current rate (rolling six month average) the last of the tailings will be shipped in late-2032.
Grand County UMTRA Liaison 2018

6. Impacts Around Moab: 17Q2-18Q1
Per Cent of Allowable Impact
Average for last 4 quarters 8
RADON 13
GAMMA
PARTIC 40 30 48 17 23 1
Guideline
3.7
100% 5 61
Offsite radon
not to exceed 3.0 pCi/L
above background 22
2.5
61% 12
Radon level at northwest boundary
Three exposure risks, OFFSITE stations, 24x7 monitoring, 0=bkgd, 100=NRC max for public exposure. 1
Background
0.7 0%
Impacts Around Moab: 17Q2-18Q1
pCi/L = picoCuries per Liter, radiation from Radon gas in the air, L4Q average

7. Impacts Around CJ: 17Q2-18Q1 Per Cent of Allowable Impact
Average for last 4 quarters
RADON 23
East Rail Bench
GAMMA 17 5
PARTIC 67
Thompson Springs 16
mREM
Guard Hut
192
100%
Gamma Guideline
Nearest Home 1% 1 93 0%
3Q Radon and gamma data installed Nov 27th, radioparticulate data installed Dec 12th, FLS
Background
92 mREM in CJ area
Guideline: Gamma not to exceed 100 mREM/yr above background.
Gamma total for last 12 months at nearest home was 93 mREM,
So 1% above CJ background of 92 mREM.
Impacts Around CJ: 17Q2-18Q1
mREM = milli-Roentgen Equivalents in Man, biological dose equivalent, sum of L4Q

8. Moab Radon CJ Radon pCi/L for quarter pCi/L for quarter
South Boundary
Moab Radon
CJ Radon
Guard Hut
NW Boundary
Total mREM for last four quarters
Total mREM for last four quarters
NW Boundary
Moab: 129 orange, S bdry blue, MEI green, ANP dots CJ: Asay green, Guard Hut purple, rail bench orange, Thompson dots
background
Environmental monitoring data provided by Moab UMTRA. Other observations provided by Grand County UMTRA Liaison on behalf of the Moab Tailings Project Steering Committee, as established by Grand County Resolution 2970A.

9. Airborne Radioparticulates
Total DCG for 17Q2 – 18Q1
DCG = Derived Concentration Guideline, a calculated estimate of radiation levels from radioparticulates
Particulates roughly track rate of tailings shipments during ARRA
SHIPMENTS CURTAILED Dec’12-Feb’13
Background averages 1.5 mREM per year (DCG) based on average of last 9 quarters before excavations began.
Environmental monitoring data provided by Moab UMTRA. Other observations provided by Grand County UMTRA Liaison on behalf of the Moab Tailings Project Steering Committee, as established by Grand County Resolution 2970A.

10. Ground Water Remediation
Extraction wells between pile and river intercept contaminated ground water
Fresh water “curtain” injected when river is low
Side channel habitat protected seasonally with added fresh water
Injection wells between side channel and Riverside Trail
908,000 pounds ammonia
4,880 pounds uranium
extracted through June, 2018
(kept out of river)
Injecting during winter does not protect habitat any better, and tends to clog up wells.
ACTIVE ground water remediation could continue 1-2 years after pile removed. Supplemental standards may be applied for PASSIVE remediation.
Well field data provided by Moab UMTRA. Other observations provided by Grand County UMTRA Liaison on behalf of the Moab Tailings Project Steering Committee, as established by Grand County Resolution 2970A.