1. Moab UMTRA Uranium Mill Tailings Remedial Action
January, 2019
looking northeast,
May, 2018 image courtesy of DOE
Quarterly Review for Steering Committee
by Russ von Koch
Grand County UMTRA Liaison

2. Highlights FY19 funding increased to $45 mil
Project total of about 9.4 million tons (58%) of tailings shipped to Crescent Jct.
Defensive wells protected 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 2992.

3. Non-Defense Environmental Small Projects
Five DOE
Non-Defense Environmental Small Projects
ARRA*
ARRA*
ARRA*
* American Recovery and Reinvestment Act of 2009, aka “Stimulus” 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 2992.

4. 201,000 tons per month with ARRA
About 58% of Tailings Removed
37,965 tons per month since workforce reduced in May 2016 & two trains
Shipments curtailed Dec 2012 – Feb 2013 due to funding cuts
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 2992.

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
INCREASED FUNDING FOR FY19!, Project Evaluating Options
ACTIVE REMEDIATION
1 remaining of 15
Total project costs are estimated at about $1 billion
At the current rolling six month average (40,000 tons / month), tailings removal will be completed around 2033.
Grand County UMTRA Liaison 2018

6. Impacts Around Moab: 17Q4-18Q3
Per Cent of Allowable Impact
Average for last 4 quarters 7
RADON 18
GAMMA 16
PARTIC 43 32 53 26 40 15
Guideline
3.7
100% 62
Offsite radon
not to exceed 3.0 pCi/L
above background
S-128 30
2.5
62% 11 16
S-127 29
Radon level at south boundary
Three exposure risks, OFFSITE stations, 24x7 monitoring, 0=bkgd, 100=NRC max for public exposure. 2 11 9
Background
0.7 0% 11
Impacts Around Moab: 17Q4-18Q3
pCi/L = picoCuries per Liter, radiation from Radon gas in the air, L4Q average

7. Impacts Around CJ: 17Q4-18Q3 Per Cent of Allowable Impact
Average for last 4 quarters
RADON
GAMMA 22
PARTIC 11
Thompson Springs
mREM
192
100%
Gamma Guideline
Nearest Home 9% 9
101 11 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 101 mREM,
or 9% above CJ background of 92 mREM.
Impacts Around CJ: 17Q4-18Q3
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
NW Boundary
S-127, ¾ mi. S
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 2992.

9. Airborne Radioparticulates
Total DCG for 17Q4 – 18Q3
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 2992.

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
Project totals of
> 919,000 pounds of ammonia
& nearly 5,000 pounds uranium
extracted through Nov, 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 2992.