Moab UMTRA Uranium Mill Tailings Remedial Action

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1 Moab UMTRA Uranium Mill Tailings Remedial Action October, 218 looking northeast, May, 218 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 (started FY 18 with $35.1) 58% of tailings removed Defensive wells still protecting river Observations provided by Grand County UMTRA Liaison on behalf of the Moab Tailings Project Steering Committee, as established by Grand County Resolution 297A.

3 ARRA* ARRA* ARRA* Tailings Removed (Millions of Tons per Year) 2.5 Funding (Million $) 2 2 FY 19 $144 m for four other non-defense sites. Moab has second highest $ of 5 non-defense Tons up! FY9 FY1 FY11 FY12 FY13 FY14 FY15 FY16 FY17 FY18 FY 19 * American Recovery and Reinvestment Act of 29, 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 297A.

4 58% of Tailings Removed 25 Tailings Removed ( tons per month) , tons per month with ARRA Shipments curtailed Dec 212 Feb 213 due to funding cuts Shipments interrupted by rock slide 37,965 tons per month since workforce reduced in May 216 & two trains 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 297A.

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 Move Tailings GW Remediation VP Remediation Site Reclamation ACTIVE REMEDIATION 1 remaining of 15 INCREASED FUNDING FOR FY19!, Project Evaluating Options 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 2??. 5 Grand County UMTRA Liaison 218

6 Per Cent of Allowable Impact Guideline Radon level at south boundary RADON GAMMA PARTIC 3.7 Offsite radon not to exceed 3. pci/l above background Background % 62% % S-128 S-127 Average for last 4 quarters Impacts Around Moab: 17Q3-18Q2 pci/l = picocuries per Liter, radiation from Radon gas in the air, L4Q average

7 Per Cent of Allowable Impact RADON GAMMA PARTIC Average for last 4 quarters 18 1 mrem 192 1% Thompson Springs Gamma Guideline 3% 95 % 3 1 Nearest Home Background 92 mrem in CJ area Guideline: Gamma not to exceed 1 mrem/yr above background. Gamma total for last 12 months at nearest home was 95 mrem, So 3% above CJ background of 92 mrem. Impacts Around CJ: 17Q3-18Q2 mrem = milli-roentgen Equivalents in Man, biological dose equivalent, sum of L4Q

8 4.5 pci/l, most recent quarter pci/l for quarter 4.5 pci/l, most recent quarter pci/l for quarter Moab Radon NW Boundary CJ Radon S-127, ¾ mi. S background.5. background Total mrem L4Q Total mrem for last four quarters background Moab 2 Gamma Total mrem L4Q Total mrem for last four quarters background CJ Gamma 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 297A.

9 Total mrem L4Q Airborne Radioparticulates Total DCG for 17Q3 18Q2 Particulates roughly track rate of tailings shipments during ARRA SHIPMENTS CURTAILED Dec 12-Feb 13 DCG = Derived Concentration Guideline, a calculated estimate of radiation levels from radioparticulates Started reporting top 6 (prev top 4); no comparable background or guideline. Thompson Arches NP Mill E (Sta 12) Mill NW (Sta 129) 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 297A.

10 Ground Water Remediation Injection wells between side channel and Riverside Trail 918, pounds ammonia 4,9 pounds uranium extracted through Sept, 218 (kept out of river) 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 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 297A.