DRC-2018-002369 - 0901a068807c9e15

ENERGYFUELS
Energr Fuels Resources (USA) Inc.
225 Union Blvd. Suite 6fi)
Lakewood, CO, US,80228
3039742L40
www.energyfuels.com
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VIA EMAIL AND OVERNIGHT DELIVERY
March 5,2018
Mr. Bryce C. Bird
Division Director
Utah Department of Environmental Quality
Air Quality Division
195 North 1950 West
Salt Lake City, Utah 84116
Re: White Mesa Uranium MiII National Emissions Standards for Radon Emission from
Operating MiIt Tailings Transmittal of ?,017 Annual Radon Flux Monitoring Report for
Tailings Impoundment 3
Dear Mr. Bird:
This letter transmits Energy Fuels Resources (USA) Inc.'s ("'EFRI's") radon-222 flux monitoring
report for the year 2Ol7 for tailings impoundment 3 ("Cell 3") at the White Mesa Uranium Mill
(the "Mill"). The result of the 2017 radon-222 flux monitoring for Cell 3 was 12.8 pCi/(m2-sec)
(averaged over the four quarterly monitoring events) and therefore was in compliance with the
standard set out in 40 CFR 61.252 of 20 pCi(m2-sec) in 2O17.
Per 40 CFR 61.253, EFRI is permitted to monitor radon flux one or more times per year. For the
2017 operating yetr, EFRI chose to monitor CeIl 3 quarterly as indicated in a letter to the Utah
Division of Air Quality and the U.S Environmental Protection Agency on February 20,2017.
Cell 3 was monitored on March 20 - 23, April 17 - 18, July 16 - L7, and October 10 - 12,2017.
Consistent with 4O CFR 61.253, EFRI notified the Utah Division of Air Quality and the U.S
Environmental Protection Agency 30 days prior to each Cell 3 sampling event, as required, in
letters dated February 20, March 10, June 13, and September 6,2017.
The results from the Cell 3, March, April, July and October 2017 sampling events are included
as Attachment 1, Attachment 2, Attachment 3, and Attachment 4, respectively, to this letter.
Div of Waste Management
and Radiation Control
lllAR - 7 2OIB
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Letter to Bryce Bird
March 5, 2018
Page 2 of 3
Please contact me at 303-389-4134 should you have any questions or need additional
information.
Yours very truly,
t( ffllf ){,-,w.d
ENERGY FUELS RESOURCES (USA) INC.
Kathy Weinel
Quality Assurance Manager
cc: David C. Frydenlund
Phil Goble, Utah DWMRC
Logan Shumway
Scott Anderson, Utah DWMRC
Jay Morris, Utah DAQ
Mark Chalmers
Paul Goranson
David Turk
Scott Bakken
Director, Air and Toxics Technical Enforcement Program, Office of Enforcement, Compliance
and Environmental Justice, U.S. Environmental Protection Agency
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Letter to Bryce Bird
March 5, 2018
Page 3 of 3
Certification:
"I certify under penalty of law that I have personally examined and am familiar with the information
submitted herein and based on my inquiry of those individuals immediately responsible for obtaining
the information, I believe that the submitted information is true, accurate, and complete. I am aware
that there are significant penalties for submitting false information including the possibility of fine
and imp ·s en See, 18 U.S.C.1001."
David C. Frydenlund
Senior Vice President, General Counsel and Corporate Secretary
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Table 1
Cell 3 Quarterly Radon Flux Sampling
Sampling Event Result (pCi/(m2 -sec)) Sampling Dates
First Quarter 10.0 March 20-23, 2017
Second Quarter 11.1 April 17 -18, 2017
Third Quarter 17.8 July 16-17, 2017
Fourth Quarter 12.1 October 10-12, 2017
2017 Average 12.8
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ATTACHMENT 1
Tellco Report for Radon Flux Monitoring
March 2017
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National Emission Standards for Hazardous Air Pollutants
2017 Radon Flux Measurement Program
White Mesa Mill
6425 South Highway 191
Blanding, Utah 84511
1st Quarter 2017 Sampling Results
Cell3
Prepared for: Energy Fuels Resources (USA) Inc.
6425 S. Highway 191
P.O. Box809
Blanding, Utah 84511
Prepared by: Tellco Environmental
P.O. Box 3987
Grand Junction, Colorado 81502
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TABLE OF CONTENTS
Page
1. INTRODUCTION ............................................................................................................................ 1
2. SITE DESCRIPTION ...................................................................................................................... 1
3. REGULATORY REQUIREMENTS FOR THE SITE .................................................................... 1
4. SAMPLING METHODOLOGY ..................................................................................................... 2
5. FIELD OPERATIONS .................................................................................................................... 2
5 .1 Equipment Preparation ....................................................................................................... 2
5.2 Sample Locations, Identification, and Placement ............................................................. 3
5.3 Sample Retrieval ............................................................................................................... 3
5.4 Environmental Conditions ................................................................................................ 3
6. SAMPLE ANALYSIS ..................................................................................................................... 4
6.1 Apparatus ........................................................................................................................... 4
6.2 Sample Inspection and Documentation ............................................................................. 4
6.3 Background and Sample Counting .................................................................................... 4
7. QUALITY CONTROL (QC) AND DATA VALIDATION ........................................................... 5
7 .1 Sensitivity' .............................................. , ............................................................................. 5
7 .2 Precision ............................................................... -.................................. ,, ........... _ ................ 5
7.3 Accuracy ....................................................................... ,Ip, ••••••••••••••••••••••••••••••••• , ....................... 6
7 .4 Completeness ......................................................................... ~ ............................................. 6
8. CALCULATIONS ........................................................................................................................... 6
9. RESULTS ........................................................................................ -. .................................................. 7
9 .1 Mean Radon Flux ................................................. ,. ............................................................. 7
9 .2 Site Results ................. , ................................................................ ,. ....... ~······························· .. 8
References ................................................................................................................................................ 9
Figure 1 ................................................................................................ ,. .............................................................. 10
Appendix A. Charcoal Canister Analyses Support Documents
Appendix B. Recount Data Analyses
Appendix C. Radon Flux Sample Laboratory Data, Including Blanks
Appendix D. Sample Locations Map (Figure 2)
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1. INTRODUCTION
During March 20-23, 2017 Tellco Environmental, LLC (Tellco) of Grand Junction, Colorado,
provided support to Energy Fuels Resources (USA) Inc. (Energy Fuels) to conduct radon flux
measurements at its White Mesa Mill site regarding the required National Emission Standards for
Hazardous Air Pollutants (NESHAPs) Radon Flux Measurements. These measurements are required
of Energy Fuels to show compliance with Federal Regulations (further discussed in Section 3 below).
The standard is not an average per facility, but is an average per radon source. The standard allows
mill owners or operators the option of either making a single set of measurements or making
measurements over a one year period (e.g., weekly, monthly, or quarterly intervals). For the calendar
year 2017, Energy Fuels is conducting the radon flux measurements for Cell 3 at quarterly intervals.
Tellco was contracted to provide radon canisters, equipment and canister placement personnel, as well
as lab analysis of samples. Energy Fuels personnel provided support for loading and unloading
charcoal from the canisters. This report details the procedures employed by Energy Fuels and Tellco
to obtain the results presented in Section 9.0 of this report. This report presents the results of the 1st
Quarter 2017 radon flux measurements for Cell 3.
2. SITE DESCRIPTION
The White Mesa Mill facility is located in San Juan County in southeastern Utah, six miles south of
Blanding, Utah. The mill began operations in 1980 for the purpose of extracting uranium and
vanadium from feed stocks.
At the time of this first quarter 2017 sampling, Cell 3 had a total area of 288,858 m2 and was
comprised of two source regions that require NESHAPs radon flux monitoring: af proximately
257,165 m2 of interim soil cover of varying thickness and approximately 25,696 m of exposed
tailings beaches. The remaining approximately 5,997 m2 was covered by standing liquid in lower
elevation areas.
3. REGULATORY REQUIREMENTS FOR THE SITE
Radon emissions from the uranium mill tailings at this site are regulated by the State of Utah's
Department of Environmental Quality, Division of Air Quality under generally applicable standards
set by the Environmental Protection Agency (EPA) for Operating Mills. Applicable regulations are
specified in 40 CFR Part 61, Subpart W, National Emission Standards for Radon Emissions from
Operating Mill Tailings, with technical procedures in Appendix B. At present, there are no Subpart T
uranium mill tailings at this site. These regulations are a subset of the NESHAPs. According to
subsection 61.252 Standard, (a) radon-222 emissions to ambient air from an existing uranium mill
tailings pile shail not exceed an average of 20 pCi/m2-s for each pile, or cell. Subsection 61.253,
Determining Compliance, states that: "Compliance with the emission standard in this subpart shall be
determined annually through the use of Method 115 of Appendix B."
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4. SAMPLING METHODOLOGY
Radon emissions were measured using Large Area Activated Charcoal Canisters (canisters) in
conformance with 40 CFR, Part 61, Appendix B, Method 115, Restrictions to Radon Flux
Measurements, (EPA, 2016). These are passive gas adsorption sampling devices used to determine
the flux rate of radon-222 gas from a surface. The canisters were constructed using a IO-inch
diameter PVC end cap containing a bed of 180 grams of activated, granular charcoal. The prepared
charcoal was placed in the canisters on a support grid on top of a ~ inch thick layer of foam and
secured with a retaining ring under 1 ~ inches of foam (see Figure 1, page 10).
Two hundred sampling locations were distributed throughout Cell 3 ( comprised of two source regions
requiring monitoring) as depicted on the Sample Locations Map (see Figure 2, Appendix D). Each
charged canister was placed directly onto the surface (open face down) and exposed to the surface for
24 hours. Radon gas adsorbed onto the charcoal and the subsequent radioactive decay of the
entrained radon resulted in radioactive lead-214 and bismuth-214. These radon progeny isotopes emit
characteristic gamma photons that can be detected through gamma spectroscopy. The original total
activity of the adsorbed radon was calculated from these gamma ray measurements using calibration
factors derived from cross-calibration of standard sources containing known total activities of
radium-226 with geometry identical to the counted samples and from the principles of radioactive
decay.
After approximately 24 hours, the exposed charcoal was transferred to a sealed plastic sample
container (to prevent sample loss and/or further exposure during transport), identified and labeled, and
transported to the Tellco laboratory in Grand Junction, Colorado for analysis.
5. FIELD OPERA TIO NS
5.1 Equipment Preparation
All charcoal was dried at 110°C before use in the field. Unused charcoal and recycled charcoal were
treated the same. 180-gram aliquots of dried charcoal were weighed and placed in sample containers.
Proper balance operation was verified daily by checking a standard weight. The balance readout
agreed with the known standard weight to within ± 0.1 percent.
After acceptable balance check, empty containers were individually placed on the balance and the
scale was re-zeroed with the container on the balance. Unexposed and dried charcoal was carefully
added to the container until the readout registered 180 grams. The lid was immediately placed on the
container and sealed with plastic tape. The balance was checked for readout drift between readings.
Sealed containers with unexposed charcoal were placed individually in the shielded counting well,
with the bottom of the container centered over the detector, and the background count rate was
documented. Three five-minute background counts were conducted on ten percent of the containers,
selected at random to represent the "batch". If the background counts were too high to achieve an
acceptable lower limit of detection (LLD), the entire charcoal batch was labeled non-conforming and
recycled through the heating/drying process.
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5.2 Sample Locations, Identification, and Placement
On March 20, 2017, one hundred sampling locations were distributed throughout the Cell 3 Covered
regions; and on March 22, 2016, one hundred sampling locations were distributed throughout the Cell
3 Beaches region. An individual ID was assigned to each sample point, using a sequential
alphanumeric system indicating the charcoal batch and physical location within the region ( e.g.,
AOl ... ClOO). This ID was written on an adhesive label affixed to the top of the canister. The sample
ID, date, and time of placement were recorded on the radon flux measurements data sheets for each
one-hundred measurement set.
Prior to placing a canister at each sample location, the retaining ring, screen, and foam pad of each
canister were removed to expose the charcoal support grid. A pre-measured charcoal charge was
selected from a batch, opened and distributed evenly across the support grid. The canister was then
reassembled and placed face down on the surface at each sampling location. Care was exercised not
to push the device into the soil surface. The canister rim was "sealed" to the surface using a berm of
local borrow material.
Five canister blanks were similarly processed for each sample set (ten blanks total) and the canisters
were kept inside an airtight plastic bag during the 24-hour testing period.
5.3 Sample Retrieval
At the end of each of the 24-hour testing periods, the canisters were retrieved, disassembled and each
charcoal sample was individually poured through a funnel into a container. Identification numbers
were transferred to the appropriate container, which was sealed and placed in a box for transport.
Retrieval date and time were recorded on the same data sheets as the sample placement information.
The blank samples were similarly processed.
During the collection and containerization process, one of the samples (A75) from the Cell 3 Cover
region was lost. All of the remaining radon flux samples and blanks from Cell 3 Cover and Cell 3
Beach regions were successfully retrieved and containerized during the unloading process.
Upon completion of on-site activities, the field equipment was alpha and beta-gamma scanned by
Energy Fuels Radiation Safety personnel and released for unrestricted use.
Tellco personnel maintained custody of the samples from collection through analysis.
5.4 Environmental Conditions
A rain gauge and thermometer were placed by Cell 3 to monitor rainfall and air temperatures during
sampling in order to ensure compliance with the regulatory measurement criteria.
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In accordance with 40 CFR, Part 61, Appendix B, Method 115:
• Measurements were not initiated within 24 hours of rainfall.
• No rainfall occurred during the Cell 3 sampling periods.
• All of the canister seals remained intact during the sampling periods.
• The minimum ambient air temperature measured during the sampling of Cell 3 was
approximately 43° F and the ground was not frozen.
6. SAMPLE ANALYSIS
6.1 Apparatus
Apparatus used for the analysis:
• Single-or multi-channel pulse height analysis system, Ludlum Model 2200 with a
Teledyne 3" x 3" sodium iodide, thallium-activated (Nal(Tl)) detector.
• Lead shielded counting well approximately 40 cm deep with 5-cm thick lead walls and a 7-
cm thick base and 5 cm thick top.
• National Institute of Standards and Technology (NIST) traceable aqueous solution radium-
226 absorbed onto 180 grams of activated charcoal.
• Ohaus Port-0-Gram balance with 0.1-gram sensitivity.
6.2 Sample Inspection and Documentation
Once in the laboratory, the integrity the samples was verified by visual inspection of the sample
containers. Laboratory personnel checked the containers and verified that the data sheet was
complete. As previously mentioned, sample A75 from the Cell 3 Cover region was lost during field
activities.
No damaged or unsealed containers were observed during inspection at the Tellco analytical
laboratory. A total of 199 samples and ten blanks for Cell 3 were ultimately verif1.ed as valid.
6.3 Background and Sample Counting
The gamma ray counting system was checked daily, including background and radium-226 source
measurements prior to and after each counting session. Based on calibration statistics, using two
sources with known radium-226 content, background and source control limits were established for
each Ludlum/Teledyne counting system with shielded well (see Appendix A).
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• The length of count time was determined by the activity of the sample being analyzed,
according to a data quality objective of a minimum of 1,000 accrued counts for any given
sample.
• The sample container was centered on the Nal detector and the shielded well door was
closed.
• The sample was counted over a determined count length and then the mid-sample count
time, date, and gross counts were documented on the radon flux measurements data sheet
and used in the calculations.
• The above steps were repeated for each exposed charcoal sample.
• Approximately 10 percent of the containers counted were selected for recounting. These
containers were recounted within a few days following the original count.
7. QUALITY CONTROL (QC) AND DATA VALIDATION
Charcoal flux measurement QC samples included the following intra-laboratory analytical frequency
objectives:
• Blanks, 5 percent, and
• Recounts, 10 percent
All sample data were subjected to validation protocols that included assessments of sensitivity,
precision, accuracy, and completeness. As described below, all Method 115-required data quality
objectives (EPA, 2016) were attained.
7.1 Sensitivity
A total of ten blanks were analyzed by measuring the radon progeny activity in samples subjected to
all aspects of the measurement process, excepting exposure to the source region. These blank sample
measurements comprised approximately five percent of the field measurements. The results of the
blank sample radon flux rates ranged from -0.01 to 0.03 pCi/m2-s, with an average of approximately
0.01 pCi/m2-s. The lower limit of detection (LLD) was approximately 0.04 pCi/m2-s.
7 .2 Precision
Twenty recount measurements, distributed throughout the sample sets, were performed by replicating
analyses of individual field samples (see Appendix B). These recount measurements comprised
approximately 10 percent of the total number of samples analyzed. The precision of Cell 3 recount
measurements above 1 pCi/m2 -sec, expressed as relative percent difference (RPD), ranged from less
than 0.1 percent to 8.7 percent with an average precision of approximately 2.8 percent RPD. This
complies with the precision objective of 10 percent.
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7 .3 Accuracy
Accuracy of field measurements was assessed daily by counting two laboratory control samples with
known Ra-226 content. Accuracy of these lab control sample measurements, expressed as percent
bias, ranged from approximately -1. 7 percent to + 1.3 percent. The arithmetic average bias of the lab
control sample measurements was approximately -0.4 percent (see Appendix A). This complies with
the accuracy objective of+/-10 percent bias.
7.4 Completeness
A combined total of 199 samples (99 samples from the Cell 3 Cover region and 100 samples from the
Cell 3 Beach regions) were verified, representing approximately 99.5 percent completeness for Cell 3,
which complies with the completeness objective of 85 percent.
8. CALCULATIONS
Radon flux rates were calculated for charcoal collection samples using calibration factors derived
from cross-calibration to sources with known total activity with identical geometry as the charcoal
containers. A yield efficiency factor was used to calculate the total activity of the sample charcoal
containers. Individual field sample result values presented were not reduced by the results of the field
blank analyses.
In practice, radon flux rates were calculated by a database computer program. The algorithms utilized
by the data base program were as follows:
Equation 8.1:
pCi Rn-222/m2sec = [fs• A *b*~.sldl!it7Sj]
where: N = net sample count rate, cpm under 220-662 ke V peak
Ts = sample duration, seconds
b = instrument calibration factor, cpm per pCi; values used:
0.1698, for M-01/D-21 and
0.1697, for M-02/D-20
d = decay time, elapsed hours between sample mid-time and count mid-time
A = area of the canister, m2
Equation 8.2:
Gross Sample, cpm Background Sample, cpm 1--------+---------SampleCount,t,min Background Count,t,min
Error, 2a = 2 x ------------------x Sample Concentration
Net,cpm
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Equation 8.3:
LLD;; 2.71 +(4,6~ ff s• A •b•O.S ·75~
where: 2.71 = constant
4.65 = confidence interval factor
Sb = standard deviation of the background count rate
Ts = sample duration, seconds
b = instrument calibration factor, cpm per pCi; values used:
0.1698, for M-01/D-21 and
0.1697, for M-02/D-20
d = decay time, elapsed hours between sample mid-time and count mid-time
A = area of the canister, m2
9. RESULTS
9.1 Mean Radon Flux
Referencing 40 CFR, Part 61, Subpart W, Appendix B, Method 115 -Monitoring for Radon-222
Emissions, Subsection 2.1.7 -Calculations, "the mean radon flux for each region of the pile and for
the total pile shall be calculated and reported as follows:
(a) The individual radon flux calculations shall be made as provided in Appendix A EPA
86(1 ). The mean radon flux for each region of the pile shall be calculated by summing all
individual flux measurements for the region and dividing by the total number of flux
measurements for the region.
(b) The mean radon flux for the total uranium mill tailings pile shall be calculated as follows:
J.iA.t + · · · Ja,A2 {+] · · · J.iA1
At
Where: Js = Mean flux for the total pile (pCi/m2-s)
Ji = Mean flux measured in region i (pCi/m2-s)
Ai = Area ofregion i (m2)
At = Total area of the pile (m2)"
40 CFR 61, Subpart W, Appendix B, Method 115, Subsection 2.1.8, Reporting states "The results of
individual flux measurements, the approximate locations on the pile, and the mean radon flux for each
region and the mean radon flux for the total stack [pile] shall be included in the emission test report. Any
condition or unusual event that occurred during the measurements that could significantly affect the results
should be reported."
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9.2 Site Results
Site Specific Sample Results (reference Appendix C)
(a) The mean radon flux for each region within Cell 3 is as follows:
Cell 3 -Beaches Region = 65.7 pCi/m2-s (based on 25,696 m2 area)
Cell 3 -Covered Region = 4.7 pCi/m2-s (based on 257,165 m2 area)
Cell 3 -Water Region = 0.0 pCi/m2-s (based on 5,997 m2 area)
Note: Reference Appendix C of this report for the entire summary of individual measurement results.
(b) Using the data presented above, the calculated mean radon flux rate for Cell 3 is as follows:
Cell 3 = 10.0 pCi/m2-s
(65.7)(25,696}+(4.7}(257,16S)+(0.0){5,997} = 10.0
288,858
As shown above, the arithmetic mean radon flux rate for Cell 3 for the first quarter 2017 sampling is
below the NRC and EPA standard of 20 pCi/m2-s. Appendix C ~3 a summary of individual
measurement results, including blank sample analysis.
No condition or unusual event occurred during the measurements that could significantly affect the
reported results.
Sample locations are depicted on Figure 2, which is included in Appendix D. Figure 2 was produced
by Tellco.
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References
U. S. Environmental Protection Agency, Radon Flux Measurements on Gardinier and Royster
Phosphogypsum Piles Near Tampa and Mulberry, Florida, EPA 520/5-85-029, NTIS #PB86-
161874, January 1986.
U.S. Environmental Protection Agency, Title 40, Code of Federal Regulations, July 2016.
U. S. Nuclear Regulatory Com.mission. Radiological Effluent and Environmental Monitoring at
Uranium Mills, Regulatory Guide 4.14, April 1980.
U.S. Nuclear Regulatory Commission, Title JO, Code of Federal Regulations, Part 40, Appendix A,
January 2017.
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Figure 1
Large Area Activated Charcoal Canisters Diagram
t '2 · i11 Ti 1i(ll Cl••rC\:ila•
9"'PP9'1 '"'"11
11a1.11in•r
S1i1in11
" 10-in ...
P\IC fr111 Cap
IfGtlllt
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Appendix A
Charcoal Canister Analyses Support Documents
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-------------------
ENERGY FUELS RESOURCES
WHITE MESA MILL, BLANDING, UTAH
2017 NESHAPs RADON FLUX MEASUREMENTS
CELL3
SAMPLING DATES: 03/20/17-03/23/17
ANALYSIS DATES: 03/24/17-03/25/17
SYSTEM COUNT 8kg Counts {1 min. each)
I.D. DATE #1 #2
M-01/0-21 3/24/2017 129 124
M-01/D-21 3/24/2017 126 128
M-01/D-21 3/25/2017 146 115
M-01/D-21 3/25/2017 140 129
M-01/D-21 3/24/2017 129 124
M-01/D-21 3/24/2017 126 128
M-01/D-21 3/25/2017 146 115
M-01/D-21 3/25/2017 140 129
M-02/D-20 3/24/2017 104 119
M-02/D-20 3/24/2017 135 103
M-02/D-20 3/25/2017 132 109
M-02/D-20 3/25/2017 127 132
M-02/D-20 3/24/2017 104 119
M-02/D-20 3/24/2017 135 103
M-02/D-20 3/25/2017 132 109
M-02/D-20 3/25/2017 127 132
#3
130
108
131
117
130
108
131
117
146
115
124
102
146
115
124
102
ACCURACY APPRAISAL TABLE
FIRST QUARTER 2017
Source Counts {1 min. each) AVG NET
#1 #2 #3 cpm
10213 10254 10142 10075
10094 10097 10168 9999
10092 9983 10072 9918
10363 10306 10314 10199
10077 10121 10101 9972
10095 10195 10025 9984
10264 10224 9962 10019
10151 10104 10182 10017
10276 10173 10158 10079
10226 10188 10104 10055
10278 10204 10106 10074
10233 9951 10231 10018
10106 9995 9953 9895
10182 10203 9980 10004
10207 10121 10073 10012
10212 10176 10155 10061
YIELD FOUND SOURCE
com/pCi pCi ID
0.1698 59336 GS-04
0.1698 58887 GS-04
0.1698 58412 GS-04
0.1698 60065 GS-04
0.1698 58728 GS-05
0.1698 58801 GS-05
0.1698 59007 GS-05
0.1698 58993 GS-05
0.1697 59395 GS-04
0.1697 59252 GS-04
0.1697 59366 GS-04
0.1697 59034 GS-04
0.1697 58309 GS-05
0.1697 58951 GS-05
0.1697 58998 GS-05
0.1697 59285 GS-05
AVERAGE PERCENT BIAS FOR ALL ANALYTICAL SESSIONS:
KNOWN %BIAS
pCi
59300 0.1%
59300 -0.7%
59300 -1.5%
59300 1.3%
59300 -1.0%
59300 -0.8%
59300 -0.5%
59300 -0.5%
59300 0.2%
59300 -0.1%
59300 0.1%
59300 -0.4%
59300 -1.7%
59300 -0.6%
59300 -0.5%
59300 0.0%
-0.4%
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CHARCOAL CANISTER ANALYSIS SYSTEM
SITE LOCATION: w ~ ~ + .e tv' t'S" f'I\ ~ \ \, B{ ~Vl d ·, V\g , 4,
CLIENT: E" er~"{ F \,\ e. \~· t4-e .SolA r c..e 5 ( LA 5 t\)
Calibration Check beJ
Calibration Date: -, / I '-1 / 1 l,, Due Date: ·, / 1 t-4, / 1 '
High Voltage: t I V °,I Window: _ __,4.....,.4_2_ Thrshld: 2.20
System ID: M-0 I / D-1-.. \
Scaler SIN: 5 I 5 "l 1
Detector SIN: 0 '-{ 1 5 3 ·3 Source ID/SN: R:J-7.r(,/ ~5-0 Lf
iO" jL/ Blank Canister Bkgd. Range, cpm: 2 O' = ___ o ___ to _ __;¥' ___ 3 <1 =
Source Activity: 5 9, 3 K f? Ci
'l'i to 11Lf
Gross Source Range, cpm: 2e1= qql.\J to ,ottsB 3cr= '181<-'1 to I 0505
Technician: JZ?-~ yµ-
All counts times are one minute
Date By · Backi! ound Counts (1 min. each) Source Counts l1 min. each) ok?
#1 #2 #3 Ava. #1 #2 #3 Average YIN
jt:2-~/11 j7Z.e.-l'l.O\ ,~4 ,~o i? .'a I 0")...I ~ l~2-5 ... ID1 t.l-? I 02-03 y
3f')...'ffl7 ,vz.G-1'2.. y l·1....B ~ (01 11-l IOOQ) 4 I Oo-oi.;; 7 \()IL.i0 l O 11--0 \I
°?/Z,/1-J iD'U ) Ll,(.o I \6 13 131 /O()a?_ 0,0\~~ J {)0'72.. iOO<t9 "l..
3/7-s-/ 17 vu l~n '-:1-q t 1'"'1 I 'Z-0\ i07,u·~ I O';n lo \ 0'7, 14 103"2..9 'Y
YIN: Y = average background and source cpm falls within the control limits.
N = ave~ge background and source cpm does not fall within the control limits.
The acceptable ranges were determined from prior background and source check data.
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t'rc.
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'f'rt:.
Po~
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CHARCOAL CANISTER ANALYSIS SYSTEM
SITE LOCATION: W Ii\·,-\-,~ ""' ~'5t\ f"\ 'i \ \ 1 l3 { Ol V\ d. ·~ It~ 1 t.{'l
CLIENT: £." e.r~ y F ~ e..l~ ~ e.~o i.A {c.,-t: 5 (_ l.{. ~ ~)
System ID: i"\-0 I /V -2. \
Scaler SIN: '51 5'11
Calibration Check 1-
Calibration Date: 7 / I Lf / I ~ Due Date:'7 / J Lf / 11
High Voltas.e: \ I (e9 Window:_~4...,.,4_2 _ Thrshld: 2.20
Detector SIN: 0 t; I 5 3 3 Source ID/SN: 'f...o?i,.',, /GS· ('~ Source Activity: 5 ~ .3 ~ pl:,
Blank Canister Bkgd. Range, cpm: 2 CJ= l O B to I "' I 3 CJ= °I 'T to l I t..J
Gross Source Range, cprn: 2 CJ= q q O '1 to IO~ G} 1-3 Cf= q· 1 C.,?) to l OU 3 8
Technician: Y?L ~ }7U-
All counts times are one minute
Date By Back11round Counts (1 min. each) Source Counts (1 min. each) ok?
#1 #2 #3 Avg. #1 #2 #3 Avera~e YIN
":J.h.!.ll1i DH_ t·'lA { 'l-~ l: 0 ('2..t? Jf'l07i (O I?-I 10, () \ ; 01 (!)0 y
':\, 1":l-4717 PU,. I '1-l,, t2..0 I C:: IJ? \ 'l..\ tnOO\ C. i"O toii:::; , ou2.::; 10,05 y
'3) .-, <' 1 ,-, './U l '-\" i l ~ l "; ~ l \',' l·o '7,~L '07---2.'-\: °>Gt~?-IO IS-0 "' ?JJ -?/_C: I II ~y l yo 12-, l 7 I ?."t \Ole;-10lll'14 1010-.i.. I 0\41.P y .
YIN: Y = average background and source cpm falls within the control limits.
N = average background and source cpm does not fall within the control limits.
The acceptable ranges were determined from prior background and source check data.
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CHARCOAL CANISTER ANALYSIS SYSTEM
SITE LOCATION:._W_~ __ -,_+_<--'-f',\.....,;,,__e_~ _"-_t'\. ___ ·~_\ \-+l---"i:;c_\;.._~-""'--d_-:·_~+-+-J ul_-r_
CLIENT: E. V\ e ~ '1 ~ I.,\ t: l ~ 13 4!f t'\A rc..e 5 (_ L,\ 5 A)
Calibration Check LQI
SystemID: M -OJ. / y -1-0 Calibration Date: 7 / t 'i { I C:., Due Date: ·; / I "1 / 17
Scaler SIN: S I 5 ~ 3 High Voltage: 925 Window:_...,,4,_,_.42..___ Thrshld: 2.20
Detector SIN: 0 '4 I 5 3 1 Source ID/SN: Ro.7.. 7-f,, / G. 5 -0 L} Source Activity: 50 · 3 Kf Li
Blank Canister Bkgd. Range, cpm: 2 a= _\_0_..:.:l-__ to __ (_"'_3 __ 3 o = 'd'] to 17 8
Gross Source Range, cpm: 2o= OJ")5 0 to (04'53 3o= to i 05 7 8
Technician: ~ ~
All counts times are one minute
Date By Backirround Counts (I min. each) Source Counts (1 min. each) ok?
#1 #2 #3 Avu.. #1 #2 #3 Averas;e YIN
3 '2.1-1 ,1 IV V iU9 1,q f '{ fl '-Z.3 I 0·2. 7 <, iOli~ l~tC p, I 0Z.o'2. y
'3 '-?~· ,, D~ ~ ,.-2, . .-., 103 I I"'> \ t B fD22i, lD I~~\ l()\0'-I iO 17'3 V
3 '25 ,..., l,,1' . D'. 132-,oq \"2-.Y. I :2-"l-I (')2, ts t02.0'+ 10 IO(,., \0\qC, ...,
--z,/2._~J n ~~ 1"1...1 \ ~'l. tD?... \ 'J-D i0"2. "'2....., ~O\ c:; I C 0·7-:3,) 10 {30 V
YIN: Y = average background and source cpm falls within the control limits.
N = average background and source cpm does not fall within the control limits.
The acceptable ranges were determined from prior background and source check data.
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'Pre.
?o~t
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CHARCOAL CANISTER ANALYSIS SYSTEM
sITE LocATION: W ", +-< M ~"' M ~, \ \ J "81 ti1 vi d. r (I~ J L{ '"T
CLIENT: E~~'f F"u.e \f R e~ov.f'e,e5 (, L\ ~A)
System ID: _M __ ~ _o_:i..._/_v_, _-_z._0 __
Calibration Check L9&
Ca;ibration Date: 7 / I'/ / I Y Due Date: 7 / / '-If c 7
Scaler SIN: __ :,_l S-_4'_3 _____ High Voltage: C} '.l. S Window: _ _.4.._.,4..._2 _ Thrshld: 2 20
Detector SIN: 0 L\ I S 3 :J.. Source ID/SN: Ro."1-°"1-y/GS,..o 5" Source Activity: 5" • 3 tl :f L;
Blank Canister Bkgd. Range, cpm: 2 cr = __ I 0_::2. __ to l y 3 3 cr= fS7 to 1·7 8
Gross Source Range, cpm: 2a= o,93t_, to 1oc.;5J 3a= ~80, to ,osBo -----
Technician: J:2L-~'t= ""f}-U,
All counts times are one minute.
Date By Background Counts (1 min. each) Source Counts ( I min. each) ok?
#1 #2 #3 Ave.. #1 #2 #3 Avera2e YIN
'3/2.Y.,, 7 ~ ID4 1,q l't<.., I "2.. "'3 I OLOu qc::,q5 ~t:JS~ I 00\B y
3l~'-flt1 :vµ:.--t-3~ to·~ ll 5"" \I~ 1D\ ~·2-lt:)'203 90J~D \01?--"2-....J
3/-2..s/ • ., vu. I "!;i:2... I() Ct \"2...4 \"2.."" l 0'"2..07 01'2-} I 00-7 3 ,ol~ 'V
3/2-5),1 r?~ 1-:2. 7 1'3:2.. ID;).. \'>-0 CO '-l "l-0 t,<., L01S _c:, ro 1 ~ I v
I
YIN: Y = average background and source cpm falls within the control limits.
N = average background and source cpm does not fall within the control limits.
The acceptable ranges were determined from prior background and source check data.
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BALANCE OPERATION DAILY CHECK
0 V\ o. \As ?o<+ ~ o -<-lf"Wl Set".* I ·;:i. 3 07 Balance Model: __________ .,J-----
Standard Weight (g): -=-3_0_0_._0 _________ _
Date Pre-check (g) Post-check (g) O.K.:1:0.1 %? By
:;/1-'-'/ ,7 ·300.0 '2-0) "' . °} y~s P/4~
"3/2.s/ ,7
f ~~ 300.0 3-00~ D ye5 ~ -
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AppendixB
Recount Data Analyses
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I
-------------------CLIENT: ENERGY FUELS RESOURCES PROJECT: RADON FLUX MEASUREMENTS, WHITE MESA MILL
PILE: 3 BATCH: A SURFACE: SOIL
AREA:COVER DEPLOYED: 3 20 17 RETRIEVED: 3
COUNTED BY: DLC FIELD TECHNICIANS: CE,DLC, WM, TE
COUNTING SYSTEM 1.0.: M01/D21, M02/D20 CAL. DUE: 7/14/17
RECOUNT CANISTER ANALYSIS:
AIR TEMP MIN: 46°F
21 17 CHARCOAL BKG:
DATA ENTRY BY: DLC
143
PROJECT NO.: 17004.01
WEATHER: CLEAR, NO RAIN
cpm Wt. Out:
TARE WEIGHT:
180.0
29.2
g.
g.
GRII, SAMPLE RSTRIV ANALYSIS MID-TIME CNT GRc::,s GF.OfS RADON :t: LLD PRECISION
LOCATION 1 • D. HR MIN HR MIN MO DA YR HR MIN (MIN) COUNTS WT IN pCi/m· 8 pCi/m' 9 pCi/m 2 S % RPD
AlO AlO 7 49 7 59 3 24 17 13 56 2 1354 218.5 1. 4 0.1 0.05
AlO AlO 7 49 7 59 3 25 17 10 45 2 1323 218.5 1.5 0.2 0.05 6.9%
A20 A20 8 1 8 5 3 24 17 14 19 4 1221 215.2 0.4 0.1 0.05
A20 A20 8 1 8 5 3 25 17 10 46 4 1109 215.2 0.4 0.1 0.05 0. 0 %
A30 A30 8 31 8 20 3 24 17 14 38 3 1002 223.1 0.5 0.1 0.05
A30 A30 8 31 8 20 3 25 17 10 52 4 1135 223.1 0.4 0.1 0.05 22.2%
A40 A40 8 43 8 26 3 24 17 14 51 1 2714 220.9 6.7 0.7 0.05
A40 A40 8 43 8 26 3 25 17 10 so 1 2300 220.9 6.5 0.7 0.05 3.0%
A50 ASO 7 55 8 2 3 24 17 15 9 4 1000 220.0 0.3 0.1 0.05
ASO A50 7 55 8 2 3 25 17 10 58 5 1137 220.0 0.3 0.1 0.05 0.0%
A60 A60 7 52 8 1 3 24 17 15 26 2 1003 216.7 0.9 0.1 0.05
A60 A60 7 52 8 1 3 25 17 10 57 3 1288 216.7 0.9 0.1 0.05 0.0%
A70 A70 8 22 8 16 3 24 17 15 40 1 1000 221.4 2.2 0.2 0.05
A70 A70 8 22 8 16 3 25 17 11 3 2 1731 221.4 2.2 0.2 0.05 0.0%
ASO A80 8 19 8 14 3 24 17 15 57 1 1566 213.7 3.7 0.4 0.05
A80 ABO 8 19 8 14 3 25 17 11 2 1 1485 213.7 4.0 0.4 0.05 7.8%
A90 A90 8 52 8 31 3 24 17 16 7 1 1844 212.5 4.5 0.5 0.05
A90 A90 8 52 8 31 3 25 17 11 5 1 1644 212.5 4.5 0.5 0.05 0.0%
AlOO AlOO 9 1 8 35 3 24 17 16 20 2 1185 217.6 1.2 0.1 0.05
AlOO AlOO 9 1 8 35 3 25 17 11 6 2 1020 217.6 1.1 0.1 0.05 8. 7%
AVERAGE PERCENT PRECISION FOR THE CELL 3 COVER REGION: 4.9%
Page 1 of 1
-------------------CLIENT: ENERGY FUELS RESOURCES PROJECT: RADON FLUX MEASUREMENTS, WHITE MESA MILL
PILE: 3 BATCH: C SURFACE: SOIL AIR TEMP MIN: 43°F
AREA: BEACH DEPLOYED: 3 22 17 RETRIEVED: 3 23 17 CHARCOAL BKG:
FIELD TECHNICIANS: CE,DLC, WM, TE COUNTED BY: DLC DATA ENTRY BY: DLC
COUNTING SYSTEM I.D.: M01/D21, M02/D20 CAL. DUE: 7/14/17
RECOUNT CANISTER ANALYSIS:
146
PROJECT NO.: 17004.01
WEATHER: NO RAIN
cpm Wt Out:
TARE WEIGHT:
180.0
29.2
g.
g.
GRL:1 :;AMPLE RETRI\' ANALYSIS Y:ID-TIHE CNT GROSS GROSS RADON ± LLD PRECISION
LOCATION l. D. HR MIN HR MIN MO DA YR HR MIN {MIN) COUNTS WT IN pCi/rn'' s pCi/m' s pCi/rn' s 'I; RPD
ClO ClO 9 47 9 13 3 24 17 12 20 1 41775 223.2 106.5 10.7 0.03
ClO ClO 9 47 9 13 3 25 17 11 10 1 35344 223.2 107.0 10.7 0.04 0.5%
C20 C20 10 2 9 19 3 24 17 12 30 1 80957 222.2 208.1 20.8 0.03
C20 C20 10 2 9 19 3 25 17 11 10 1 67975 222.2 207.3 20.7 0.04 0.4%
C30 C30 9 41 9 32 3 24 17 12 37 1 53150 223.2 133.5 13.4 0.03
C30 C30 9 41 9 32 3 25 17 11 12 1 45965 223.2 136.8 13.7 0.04 2.4%
C40 C40 9 55 9 39 3 24 17 12 46 1 41401 223.3 104.4 10.4 0.03
C40 C40 9 55 9 39 3 25 17 11 12 1 34903 223.3 104.2 10.4 0.04 0.2%
C50 C50 10 10 9 38 3 24 17 12 53 1 24913 219.6 63.4 6.3 0.03 cso C50 10 10 9 38 3 25 17 11 13 1 22112 219.6 66.5 6.7 0.04 4.8%
C60 C60 9 47 9 13 3 24 17 13 0 1 3136 217.8 7.7 0.8 0.03
C60 C60 9 47 9 13 3 25 17 11 13 1 2729 217.8 7.9 0.8 0.04 2.6%
C70 C70 10 2 9 19 3 24 17 13 8 1 22534 219.5 57.9 5.8 0.03
C70 C70 10 2 9 19 3 25 17 11 15 1 19722 219.5 59.9 6.0 0.04 3.4%
C80 cao 9 41 9 9 3 24 17 13 16 1 29233 221.4 74.9 7.5 0.03
cao CBO 9 41 9 9 3 25 17 11 15 1 24784 221.4 74.9 7.5 0.04 0.0%
C90 C90 9 55 9 16 3 24 17 13 23 l 27166 217.4 69.9 7.0 0.03
C90 C90 9 55 9 16 3 25 17 11 16 1 23746 217.4 72.0 7.2 0.04 3.0%
ClOO ClOO 10 10 9 23 3 24 17 13 31 1 75617 219.1 196.3 19.6 0.03
ClOO ClOO 10 10 9 23 3 25 17 11 16 1 64544 219.1 197.4 19.7 0.04 0.6%
AVERAGE PERCENT PRECISION FOR THE CELL 3 BEACH REGION: 1.8%
Page 1 of 1
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AppendixC
Radon Flux Sample Laboratory Data (including Blanks)
C
-------------------CLIENT: ENERGY FUELS RESOURCES PROJECT: RADON FLUX MEASUREMENTS, WHITE MESA MILL
PILE: 3 BATCH: A SURFACE: SOIL
AREA: COVER DEPLOYED: 3 20 17 RETRIEVED: 3
COUNTED BY: DLC FIELD TECHNICIANS: CE,DLC, WM, TE
COUNTING SYSTEM I.D.: M01/021, M02/D20 CAL. DUE: 7/14/17
AIR TEMP MIN: 46°F
21 17 CHARCOAL BKG:
DATA ENTRY BY: DLC
143
PROJECT NO.: 17004.01
WEATHER: CLEAR, NO RAIN
cpm Wt. Out:
TARE WEIGHT:
180.0
29.2
c;;:• I :;,:,11;: u_.; DS'.'LOY RETRIV ANAL YSI::'. MIL' TIME CNT GROSE GROSS RADON ± LLD
g.
g.
LOCATION I. D. HR MIN HR MIN MO DA YR HR MIN (MIN) COUNTS WT IN pCi/m's pCi/.m 2 s pCi/m's COMMENTS:
AOl AOl 7 40 7 55 3 24 17 13 35 2 1770 216.1 1.9 0.2 0.05
A02 A02 7 43 7 56 3 24 17 13 34 1 2257 219.5 5.4 0.5 0.05
A03 A03 7 46 7 58 3 24 17 13 38 3 1413 221. 5 0.8 0.1 0.05
A04 A04 7 49 7 59 3 24 17 13 40 6 1062 222·.3 0.1 0.0 0.05
A05 A05 7 52 8 1 3 24 17 13 46 4 1084 219.9 0.3 0.0 0.05
A06 A06 7 55 8 2 3 24 17 13 46 4 1312 223.4 0.5 0.1 0.05
AO? A07 7 40 7 55 3 24 17 13 51 4 1116 217.4 0.3 0.1 0.05
A08 A08 7 43 7 56 3 24 17 13 51 5 1000 221.5 0.1 0.0 0.05
A09 A09 7 46 7 58 3 24 17 13 57 5 1185 218.2 0.2 0.0 0.05
AlO AlO 7 49 7 59 3 24 17 13 56 2 1354 218.5 1.4 0.1 0.05
All All 7 52 8 1 3 24 17 14 1 2 1227 213.7 1.2 0.1 0.05
A12 A12 7 55 8 2 3 24 17 14 2 4 1181 217.8 0.4 0.1 0.05
Al3 A13 7 58 8 4 3 24 17 14 7 4 1249 221.8 0.4 0.1 0.05
Al4 Al4 8 1 8 5 3 24 17 14 6 2 1633 218.4 1. 7 0.2 0.05
A15 A15 8 4 8 7 3 24 17 14 10 1 6338 218.7 15.8 l. 6 0.05
Al6 Al6 8 7 8 8 3 24 17 14 11 3 1146 220.7 0.6 0.1 0.05
A17 A17 8 10 8 10 3 24 17 14 15 3 1421 221.4 0.8 0.1 0.05
A18 A18 8 13 8 11 3 24 17 14 15 3 1037 220.4 0.5 0.1 0.05
A19 Al9 7 58 8 4 3 24 17 14 19 4 1024 218.5 0.3 0.0 0.05
A20 A20 8 l 8 5 3 24 17 14 19 4 1221 215.2 0.4 0.1 0.05
A21 A21 8 4 8 7 3 24 17 14 24 4 1233 216.0 0.4 0.1 0.05
A22 A22 8 7 8 8 3 24 17 14 24 3 1288 217.2 0.7 0.1 0.05
A23 A23 8 10 8 10 3 24 17 14 28 3 1023 219.6 0.5 0.1 0.05
A24 A24 8 13 8 11 3 24 17 14 28 1 10226 219.7 25.9 2.6 0.05
A25 A25 8 16 8 13 3 24 17 14 31 1 3496 222.0 8.6 0.9 0.05
A26 A26 8 19 8 14 3 24 17 14 32 3 1001 222.1 0.5 0.1 0.05
A27 A27 8 22 8 16 3 24 17 14 35 2 1586 217.7 1. 7 0.2 0.05
A28 A28 8 25 8 17 3 24 17 14 35 2 1073 220.0 l. 0 0.1 0.05
A29 A29 8 28 8 19 3 24 17 14 37 1 4369 221.0 10.9 1.1 0.05
A30 A30 8 31 8 20 3 24 17 14 38 3 1002 223.1 0.5 0.1 0.05
A31 A31 8 16 8 13 3 24 17 14 41 2 1171 219.8 1.1 0.1 0.05
A32 A32 8 19 8 14 3 24 17 14 41 1 2353 222.8 5.7 0.6 0.05
A33 A33 8 22 8 16 3 24 17 14 43 1 1419 220.0 3.3 0.3 0.05
A34 A34 8 25 8 17 3 24 17 14 43 1 3458 218.3 8.6 0.9 0.05
A35 A35 8 28 8 19 3 24 17 14 45 1 6073 219.0 15.3 1. 5 0.05
A36 A36 8 31 8 20 3 24 17 14 46 3 1068 219.7 0.6 0.1 0.05
A37 A37 8 34 8 22 3 24 17 14 49 2 1159 220.8 l. l 0.1 0.05
Page 1 of 3
-------------------CLIENT: ENERGY FUELS RESOURCES PROJECT: RADON FLUX MEASUREMENTS, WHITE MESA MILL
PILE: 3 BATCH: A SURFACE: SOIL AIR TEMP MIN: 46°F
AREA: COVER DEPLOYED: 3 20 17 RETRIEVED: 3 21 17 CHARCOAL BKG:
FIELD TECHNICIANS: CE,DLC, WM, TE COUNTED BY: DLC DATA ENTRY BY: DLC
COUNTING SYSTEM 1.0.: M01/D21, M02/D20 CAL. DUE: 7/14/17
143
PROJECT NO.: 17004.01
WEATHER: CLEAR, NO RAIN
cpm Wt. Out:
TARE WEIGHT:
180.0
29.2
GRID SAMPLE DEPLCY RETRIV AllALYSlD MILl-TIME CNT GRCSS GROSS RADON ± LLD
g.
g.
LOCATION' I. D. HR MIN HR MIN MO DA YR HR MIN (MIN) COUNTS WT IN pCi/m' s pCi/m 0 s pCi/m> s COMMENTS:
A38 A38 8 37 8 23 3 24 17 14 49 1 11764 214.8 30.1 3.0 0.05
A39 A39 8 40 8 25 3 24 17 14 51 1 7059 218.9 17.9 1. 8 0.05
A40 A40 8 43 8 26 3 24 17 14 51 1 2714 220.9 6.7 0.7 0.05
A41 A41 8 40 8 22 3 24 17 14 55 4 1007 220.8 0.3 0.0 0.05
A42 A42 8 43 8 23 3 24 17 14 55 3 1285 220.5 0.7 0.1 0.05
A43 A43 8 34 8 25 3 24 17 14 59 2 1011 221.0 0.9 0 .1 -0.05
A44 A44 8 37 8 26 3 24 17 14 59 1 4889 222.7 12.3 1.2 0.05
A45 A45 7 40 7 55 3 24 17 15 2 2 1709 219.0 1. 8 0.2 0.05
A46 A46 7 43 7 56 3 24 17 15 2 1 6463 221.3 16.2 1.6 0.05
A47 A47 7 46 7 58 3 24 17 15 5 3 1060 211. 8 0.5 0.1 0.05
A48 A48 7 49 7 59 3 24 17 15 5 1 6575 214.7 16.5 1.6 0.05
A49 A49 7 52 8 1 3 24 17 15 8 1 2054 215.2 4.9 0.5 0.05
A50 ASO 7 55 8 2 3 24 17 15 9 4 1000 220.0 0.3 0.0 0.05
ASl ASl 7 58 8 4 3 24 17 15 12 1 3617 218.0 8.9 0.9 0.05
A52 A52 8 l 8 5 3 24 17 15 13 3 1060 216.0 0.5 0.1 0.05
A53 A53 8 4 8 7 3 24 17 15 17 3 1255 217.2 0.7 0.1 0.05
A54 A54 8 7 8 8 3 24 17 15 16 1 3499 219.8 8.7 0.9 0.05
ASS ASS 8 10 8 10 3 24 17 15 20 2 1066 216.9 1. 0 0.1 0.05
A56 A56 7 40 7 55 3 24 17 15 20 1 1573 219.8 3.7 0.4 0.05
A57 A57 7 43 7 56 3 24 17 15 22 1 1013 223.8 2.2 0.2 0.05
ASS ASS 7 46 7 58 3 24 17 15 23 2 1156 215.1 1.1 0.1 0.05
A59 A59 7 49 7 59 3 24 17 15 25 1 1078 214.9 2.4 0.2 0.05
A60 A60 7 52 8 1 3 24 17 15 26 2 1003 216.7 0.9 0.1 0.05
A6l A61 7 55 8 2 3 24 17 15 28 1 3228 216.6 7.9 0.8 0.05
A62 A62 7 58 8 4 3 24 17 15 29 3 1006 221. 8 0.5 0.1 0.05
A63 A63 8 1 8 5 3 24 17 15 32 2 1699 220.1 1. 8 0.2 0.05
A64 A64 8 4 8 7 3 24 17 15 32 2 1298 225.7 1.3 0.1 0.05
A65 A65 8 7 8 8 3 24 17 15 35 3 1317 215.6 0.8 0.1 0.05
A66 A66 8 10 8 10 3 24 17 15 35 2 1966 215.0 2.2 0.2 0.05
A67 A67 8 13 8 11 3 24 17 15 38 2 1267 216.5 1.3 0.1 0.05
A68 A68 8 16 a 13 3 24 17 15 38 2 1834 216.3 2.0 0.2 0.05
A69 A69 a 19 8 14 3 24 17 15 40 1 9525 220.1 24.3 2.4 0.05
A70 A70 8 22 8 16 3 24 17 15 40 1 1000 221.4 2.2 0.2 0.05
A71 A71 8 25 8 17 3 24 17 15 41 1 1882 219.9 4.5 0.5 0.05
A72 A72 8 28 8 19 3 24 17 15 42 2 1261 215.1 1.3 0.1 0.05
A73 A73 8 31 8 20 3 24 17 15 44 1 1244 212.6 2.9 0.3 0.05
A74 A74 8 34 8 22 3 24 17 15 44 1 1100 216.6 2.5 0.2 0.05
Page 2 of 3
-------------------CLIENT: ENERGY FUELS RESOURCES PROJECT: RADON FLUX MEASUREMENTS, WHITE MESA MILL
PILE: 3 BATCH: A SURFACE: SOIL
AREA: COVER DEPLOYED: 3 20 17 RETRIEVED: 3
COUNTED BY: DLC FIELD TECHNICIANS: CE,DLC, WM, TE
COUNTING SYSTEM 1.0.: M01/D21, M02/D20 CAL. DUE: 7/14/17
AIR TEMP MIN: 46°F
21 17 CHARCOAL BKG:
DATA ENTRY BY: DLC
143
PROJECT NO.: 17004.01
WEATHER: CLEAR, NO RAIN
cpm Wt. Out:
TARE WEIGHT:
180.0
29.2
GRIL SAM?LE DSPLOY RETRIV ANALYSIS MID-TIME CNT GROSS GRm;s RADON ± LLD
g.
g.
LOCATION I. D, HR MIN HR MIN MO DA YR HR MIN (MIN) COUNTS WT IN pCi/m' s pCi/m s pCi/m' s COMMENTS: ·~-~~-~----A75 A75 8 37 8 23 3 24 17 15 50 8 1177 NO SAMPLE
A76 A76 8 40 8 25 3 24 17 15 48 4 1084 221.6 0.3 0.1 0.05
A77 A77 8 43 8 26 3 24 17 15 55 1 4203 218.5 10.6 1.1 0.05
A78 A78 8 13 8 11 3 24 17 15 55 1 1004 220.1 2.2 0.2 0.05
A79 A79 8 16 8 13 3 24 17 15 57 1 2818 216.0 6.9 0.7 0.05
A80 ABO 8 19 8 14 3 24 17 15 57 1 1566 213.7 3.7 0.4 0.05
ABl ABl 8 22 8 16 3 24 17 15 58 1 4057 216.2 10.2 1. 0 0.05
A82 AB2 8 25 8 17 3 24 17 15 58 1 5313 220.3 13.5 1.3 0.05
A83 A83 8 28 8 19 3 24 17 16 0 1 4506 215.1 11.4 1.1 0.05
A84 A84 8 31 8 20 3 24 17 16 0 1 4733 219.6 12.0 1.2 0.05
ABS A85 8 34 8 22 3 24 17 16 1 1 8278 217.5 21.2 2.1 0.05
A86 A86 8 37 8 23 3 24 17 16 2 2 1494 218.5 1.6 0.2 0.05
A87 A87 8 40 8 25 3 24 17 16 4 1 2851 212.2 7.1 0.7 0.05
ABB ABB 8 46 8 28 3 24 17 16 5 2 1003 214.4 0.9 0.1 0.05
A89 A89 8 49 8 29 3 24 17 16 7 1 2587 217.4 6.4 0.6 0.05
A90 A90 8 52 8 31 3 24 17 16 7 1 1844 212.5 4.5 0.4 0.05
A91 A91 8 55 8 32 3 24 17 16 9 2 1400 217.2 1. 5 0.1 0.05
A92 A92 8 58 8 34 3 24 17 16 9 2 1177 216.7 1.2 0.1 0.05
A93 A93 9 1 8 35 3 24 17 16 12 2 1303 220.3 1.3 0.1 0.05
A94 A94 8 43 8 26 3 24 17 16 11 1 2500 222.6 6.2 0.6 0.05
A95 A95 8 46 8 28 3 24 17 16 14 1 3061 214.4 7.7 0.8 0.05
A96 A96 8 49 8 29 3 24 17 16 14 1 1172 221.4 2.7 0.3 0.05
A97 A97 8 52 8 31 3 24 17 16 15 1 5301 218.6 13.5 1.4 0.05
A98 A98 8 55 8 32 3 24 17 16 17 3 1053 215.0 0.5 0.1 0.05
A99 A99 8 58 8 34 3 24 17 16 20 2 1154 209.3 1.1 0.1 0.05
AlOO AlOO 9 1 8 35 3 24 17 16 20 2 1185 217.6 1.2 0.1 0.05
AVERAGE RADON FLUX RATE FOR THE CELL 3 COVER REGION: 4.7
BLANK CANISTER ANALYSIS: 30.1 MAX
GRI;:; SAMPLE RETRIV ANALYSIS MID-TIME CNT GRCSS (cROSS RADON ± LLD
LOCATION I. D. HR MIN HR MIN MO DA YR HR MIN (MIN) COUNTS WT IN pCi/m's pCi/m's pCi/m's COMMENTS:
A BLANK 1 A BLANK 1 7 20 7 so 3 24 17 9 so 10 1459 206.8 0.01 0.03 0.04 CONTROL
A BLANK 2 A BLANK 2 7 20 7 50 3 24 17 9 50 10 1438 207.0 0.00 0.03 0.04 CONTROL
A BLANK 3 A BLANK 3 7 20 7 50 3 24 17 10 4 10 1480 207.6 0.01 0.03 0.04 CONTROL
A BLANK 4 A BLANK 4 7 20 7 50 3 24 17 10 4 10 1382 207.8 -0.01 0.03 0.04 CONTROL
A BLANK 5 A BLANK 5 7 20 7 50 3 24 17 10 20 10 1452 207.8 0.01 0.03 0.04 CONTROL
AVERAGE BLANIC CANISTER ANALYSIS FOR THE CELL 3 COVER REGION: 0.00 £Ci/m 2 s
Page 3 of 3
-- - - - - - --- ----- -- --CLIENT: ENERGY FUELS RESOURCES PROJECT: RADON FLUX MEASUREMENTS, WHITE MESA MILL PROJECT NO.: 17004.01
PILE: 3 BATCH:C SURFACE: SOIL AIR TEMP MIN: 43°F WEATHER: NO RAIN
AREA: BEACH DEPLOYED: 3 22 17 RETRIEVED: 3 23 17 CHARCOAL BKG: 146 cpm Wt. Out: 180.0 g.
FIELD TECHNICIANS: CE,DLC, WM, TE COUNTED BY: DLC DATA ENTRY BY: DLC TARE WEIGHT: 29.2 g.
COUNTING SYSTEM I.D.: M01/D21, M02/D20 CAL. DUE: 7/14/17
GRID S1\HPLS DEPLOY RETRIV ANALYSIS MID-TIME CNT GROSS GROS~~ RADON ± LLD
LOCATION I. D. HR MIN HR MIN MO DA YR HR MIN (MIN) COUNTS WT IN pCi/m' s pCi/m" s pCi/m 2 s COMMENTS:
COl COl 9 35 9 7 3 24 17 12 14 1 34273 222.0 60.5 6.1 0.03
CO2 CO2 9 36 9 7 3 24 17 12 14 1 16103 223.6 28.3 2.8 0.03
C03 C03 9 38 9 8 3 24 17 12 16 1 51876 220.3 91. 8 9.2 0.03
C04 C04 9 39 9 9 3 24 17 12 16 1 145005 225.5 257.3 25.7 0.03
cos cos 9 41 9 9 3 24 17 12 17 1 82728 227.2 146.8 14.7 0.03
COG C06 9 42 9 10 3 24 17 12 17 1 49356 221. 5 87.5 8.8 0.03
C07 C07 9 43 9 11 3 24 17 12 19 1 42826 219.9 75.9 7.6 0.03
cos COB 9 44 9 11 3 24 17 12 19 1 58734 219.7 104.3 10.4 0.03
C09 C09 9 46 9 12 3 24 17 12 20 1 81485 223.9 144.8 14.5 0.03
ClO ClO 9 47 9 13 3 24 17 12 20 1 41775 223.2 74.1 7.4 0.03
Cll Cll 9 49 9 13 3 24 17 12 22 1 72379 221. 8 128.8 12.9 0.03
C12 C12 9 50 9 14 3 24 17 12 22 1 69823 221.7 124.3 12.4 0.03
C13 Cl3 9 52 9 15 3 24 17 12 23 1 80582 221.1 143.5 14.3 0.03
Cl4 Cl4 9 53 9 15 3 24 17 12 23 1 39514 219.6 70.3 7.0 0.03
C15 C15 9 55 9 16 3 24 17 12 27 1 23288 220.3 41. 3 4.1 0.03
Cl6 C16 9 56 9 17 3 24 17 12 27 1 13165 219.9 23.3 2.3 0.03
C17 Cl7 9 58 9 17 3 24 17 12 28 1 3287 217.3 5.6 0.6 0.03
Cl8 Cl8 9 59 9 -18 3 24 17 12 28 1 22027 217.5 39.2 3.9 0.03
Cl9 Cl9 10 0 9 19 3 24 17 12 30 1 30558 217.9 54.4 5.4 0.03
C20 C20 10 2 9 19 3 24 17 12 30 1 80957 222.2 144.8 14.5 0.03
C21 C21 10 3 9 20 3 24 17 12 31 1 36619 218.1 65.3 6.5 0.03
C22 C22 10 5 9 21 3 24 17 12 31 1 14176 216.6 25.2 2.5 0.03
C23 C23 10 6 9 21 3 24 17 12 33 1 75830 221. 9 135.7 13.6 0.03
C24 C24 10 8 9 22 3 24 17 12 33 1 76390 216.4 136.9 13.7 0.03
C25 C25 10 10 9 23 3 24 17 12 34 1 7618 222.0 13 .4 1.3 0.03
C26 C26 9 35 9 30 3 24 17 12 34 1 32461 226.7 56.5 5.6 0.03
C27 C27 9 36 9 30 3 24 17 12 36 1 34197 220.3 59.5 6.0 0.03
C28 C28 9 38 9 31 3 24 17 12 36 1 34052 218.6 59.3 5.9 0.03
C29 C29 9 39 9 32 3 24 17 12 37 1 30066 220.9 52.3 5.2 0.03
C30 C30 9 41 9 32 3 24 17 12 37 1 53150 223.2 92.9 9.3 0.03
C31 C31 9 42 9 33 3 24 17 12 40 1 59717 221.1 104.3 10.4 0.03
C32 C32 9 43 9 34 3 24 17 12 40 1 69221 224.8 121.0 12.1 0.03
C33 C33 9 44 9 34 3 24 17 12 41 1 36616 222.8 63.9 6.4 0.03
C34 C34 9 46 9 35 3 24 17 12 41 1 37901 223.3 66.2 6.6 0.03
C35 C35 9 47 9 36 3 24 17 12 43 1 26627 216.4 46.4 4.6 0.03
C36 C36 9 49 9 36 3 24 17 12 43 1 41904 222.5 73.4 7.3 0.03
C37 C37 9 50 9 37 3 24 17 12 44 1 55702 220.5 97.5 9.8 0.03
Page 1 of 3
-- -- - - -- - -- -- - - -- - -CLIENT: ENERGY FUELS RESOURCES PROJECT: RADON FLUX MEASUREMENTS, WHITE MESA MILL PROJECT NO.: 17004.01
PILE: 3 BATCH:C SURFACE: SOIL AIR TEMP MIN: 43°F WEATHER: NO RAIN
AREA:BEACH DEPLOYED: 3 22 17 RETRIEVED: 3 23 17 CHARCOAL BKG: 146 cpm Wt. Out: 180.0 g.
FIELD TECHNICIANS: CE,DLC, WM, TE COUNTED BY: DLC DATA ENTRY BY: DLC TARE WEIGHT: 29.2 g.
COUNTING SYSTEM 1.0.: M01/D21, M02/D20 CAL. DUE: 7/14/17
(~RH: SAM2LS DEPLOY RETRI\l A •. N.P.LYSIS MID-TIME en ;ROSS ,;iws::,; RADON ± LLD
LOCATION I. D. HR MIN HR MIN MO DA YR HR MIN (MIN) COUNTS WT IN pCi/m' s pCi/rn 2 s pCi/m 2 s COMJ>.'.!ENTS:
C38 C38 9 52 9 38 3 24 17 12 44 1 27160 222.0 47.5 4.7 0.03
C39 C39 9 53 9 38 3 24 17 12 46 1 46740 219.4 81. 9 8.2 0.03
C40 C40 9 55 9 39 3 24 17 12 46 1 41401 223.3 72.6 7.3 0.03
C41 C41 9 56 9 40 3 24 17 12 47 1 22663 223.2 39.6 4.0 0.03
C42 C42 9 58 9 40 3 24 17 12 47 1 19629 224.3 34.3 3.4 0.03
C43 C43 9 59 9 34 3 24 17 12 49 1 23358 220.7 41.1 4.1 0.03
C44 C44 10 0 9 34 3 24 17 12 49 1 34090 217.7 60.2 6.0 0.03
C45 C45 10 2 9 35 3 24 17 12 50 1 28870 217.6 50.9 5.1 0.03
C46 C46 10 3 9 36 3 24 17 12 50 1 60454 220.9 107.0 10.7 0.03
C47 C47 10 5 9 36 3 24 17 12 52 1 29214 217.9 51. 6 5.2 0.03
C48 C48 10 6 9 37 3 24 17 12 52 1 27711 218.0 49.0 4.9 0.03
C49 C49 10 8 9 38 3 24 17 12 53 1 18089 221.8 31. 9 3.2 0.03
C50 C50 10 10 9 38 3 24 17 12 53 1 24913 219.6 44.1 4.4 0.03
C51 C51 9 35 9 7 3 24 17 12 55 1 2675 215.2 4.5 0.5 0.03
C52 C52 9 36 9 7 3 24 17 12 55 1 37082 214.B 65.9 6.6 0.03
C53 C53 9 38 9 8 3 24 17 12 56 1 17198 218.3 30.4 3.0 0.03
C54 C54 9 39 9 9 3 24 17 12 56 1 38047 217.8 67.7 6.8 0.03
C55 C55 9 41 9 9 3 24 17 12 57 1 25890 220.1 46.0 4.6 0.03
C56 C56 9 42 9 10 3 24 17 12 57 1 5156 221.2 9.0 0.9 0.03
C57 C57 9 43 9 11 3 24 17 12 59 1 3593 232.1 6.2 0.6 0.03
C58 C58 9 44 9 11 3 24 17 12 59 1 9252 220.1 16.3 1.6 0.03
C59 C59 9 46 9 12 3 24 17 13 0 1 43632 219.4 77.8 7.8 0.03
C60 C60 9 47 9 13 3 24 17 13 0 1 3136 217.8 5.4 0.5 0.03
C61 C61 9 49 9 13 3 24 17 13 2 1 5643 225.6 9.8 1. 0 0.03
C62 C62 9 50 9 14 3 24 17 13 2 1 33517 225.0 59.8 6.0 0.03
C63 C63 9 52 9 15 3 24 17 13 3 1 7932 221.1 14.0 1.4 0.03
C64 C64 9 53 9 15 3 24 17 13 3 1 12120 218.8 21. 5 2.1 0.03
C65 C65 9 55 9 16 3 24 17 13 5 1 27665 216.3 49.4 4.9 0.03
C66 C66 9 56 9 17 3 24 17 13 5 1 17377 220.7 30.9 3.1 0.03
C67 C67 9 58 9 17 3 24 17 13 7 1 8017 216.2 14.1 1.4 0.03
C68 C68 9 59 9 18 3 24 17 13 7 1 24826 217.5 44.4 4.4 0.03
C69 C69 10 0 9 19 3 24 17 13 8 1 9967 219.3 17.7 1. 8 0.03
C70 C70 10 2 9 19 3 24 17 13 8 1 22534 219.5 40.3 4.0 0.03
C71 C71 10 3 9 20 3 24 17 13 10 1 2842 219.0 4.9 0.5 0.03 en C72 10 5 9 21 3 24 17 13 10 1 42833 223.3 76.9 7.7 0.03
C73 C73 10 6 9 21 3 24 17 13 11 1 33910 217.1 60.9 6.1 0.03
C74 C74 10 8 9 22 3 24 17 13 11 1 24322 219.4 43.6 4.4 0.03
Page 2 of 3
- - ---- -- - - -- - -- ----CLIENT: ENERGY FUELS RESOURCES PROJECT: RADON FLUX MEASUREMENTS, WHITE MESA MILL PROJECT NO.: 17004.01
PILE: 3 BATCH:C SURFACE: SOIL AIR TEMP MIN: 43°F WEATHER: NO RAIN
AREA:BEACH DEPLOYED: 3 22 17 RETRIEVED: 3 23 17 CHARCOAL 8KG: 146 cpm Wt. Out: 180.0 g.
FIELD TECHNICIANS: CE,DLC, WM, TE COUNTED BY: DLC DATA ENTRY BY: DLC TARE WEIGHT: 29.2 g.
COUNTING SYSTEM I.D.: M01/D21, M02/D20 CAL. DUE: 7/14/17
GRID s,;H?LE DEPLOY RETRIV ANALYSIS MID-TIME CNT GROS:::· GR0:'3S PADON ± LLD
LOCATION I. D. HR MIN HR MIN MO DA YR HR MIN (MIN) COUNTS WT IN pCi/m s pCi/m· s pCi/rn' s COMMENTS: --·-··--·-------~---~-~-
C75 C75 10 10 9 23 3 24 17 13 13 1 39908 219.9 71.8 7.2 0.03
C76 C76 9 35 9 7 3 24 17 13 13 1 47973 219.6 85.5 8.5 0.03
C77 C77 9 36 9 7 3 24 17 13 14 1 40539 219.5 72.2 7.2 0.03
C78 C78 9 38 9 8 3 24 17 13 14 1 35872 217.8 63.9 6.4 0.03
C79 C79 9 39 9 9 3 24 17 13 16 1 34137 221. 9 60.8 6.1 0.03
CBO CBO 9 41 9 9 3 24 17 13 16 1 29233 221.4 52.1 5.2 0.03
C81 C81 9 42 9 10 3 24 17 13 17 1 15823 221.5 28.1 2.8 0.03
C82 C82 9 43 9 11 3 24 17 13 17 1 25981 219.4 46.3 4.6 0.03
C83 C83 9 44 9 11 3 24 17 13 19 1 39858 221.0 71.2 7.1 0.03
C84 C84 9 46 9 12 3 24 17 13 19 1 28864 219.7 51. 5 5.2 0.03
C85 CBS 9 47 9 13 3 24 17 13 20 1 21467 220.5 38.2 3.8 0.03
C86 C86 9 49 9 13 3 24 17 13 20 1 50804 220.6 91. 0 9.1 0.03
C87 C87 9 50 9 14 3 24 17 13 22 1 28976 219.9 51.8 5.2 0.03
CBS CBS 9 52 9 15 3 24 17 13 22 1 37488 220.9 67.1 6.7 0.03
C89 C89 9 53 9 15 3 24 17 13 23 1 37519 217.9 67.2 6.7 0.03
C90 C90 9 55 9 16 3 24 17 13 23 1 27166 217.4 48.6 4.9 0.03
C91 C91 9 56 9 17 3 24 17 13 25 1 35875 225.6 64.3 6.4 0.03
C92 C92 9 58 9 17 3 24 17 13 25 1 76311 219.9 137.3 13.7 0.03
C93 C93 9 59 9 18 3 24 17 13 26 1 101627 217.3 182.8 18.3 0.03
C94 C94 10 0 9 19 3 24 17 13 26 1 106952 221.3 192.5 19.3 0.03
C95 C95 10 2 9 19 3 24 17 13 28 1 60673 218.6 109.2 10.9 0.03
C96 C96 10 3 9 20 3 24 17 13 28 1 11769 221. 0 21.0 2.1 0.03
C97 C97 10 5 9 21 3 24 17 13 29 1 30053 220.0 54.0 5.4 0.03
C98 C98 10 6 9 21 3 24 17 13 29 1 6636 217.0 11. 7 1.2 0.03
C99 C99 10 8 9 22 3 24 17 13 31 1 24120 220.8 43.3 4.3 0.03
ClOO ClOO 10 10 9 23 3 24 17 13 31 1 75617 219.1 136.6 13.7 0.03
AVERAGE RADON FLUX RATE FOR THE CELL 3 BEACH REGION: i/m 2 s
BLANK CANISTER ANALYSIS: 257.3 MAX
'.,;?.JD ::;.i\M?Li:: RETRIV ANALYSIC; MID -TIME CNT GRGSS GROSS RADON ± LLD
LOCATION I. D. HR MIN HR MIN MO Dl\ YR HR MIN (MIN) COUNTS WT IN pCi/m' s pCi/m' s pCi/m' s COMMENTS:
C BLANK 1 C BLANK 1 9 15 9 10 3 24 17 21 0 10 1608 208.5 0.03 0.03 0.03 CONTROL
C BLANK 2 C BLANK 2 9 15 9 10 3 24 17 21 0 10 1517 209.6 0.01 0.02 0.03 CONTROL
C BLANK 3 C BLANK 3 9 15 9 10 3 24 17 21 11 10 1530 211.7 0.01 0.02 0.03 CONTROL
C BLANK 4 C BLANK 4 9 15 9 10 3 24 17 21 11 10 1439 209.6 0.00 0.02 0.03 CONTROL
C BLANK 5 C BLANK 5 9 15 9 10 3 24 17 21 22 10 1468 202.9 0.00 0.02 0.03 CONTROL
AVERAGE BLANK CANISTER ANALYSIS FOR THE CELL 3 BEACH REGION: 0.01 ,i:,Ci/m2 s
Page 3 of 3
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AppendixD
Sample Locations Map (Figure 2)
D
\ . .
0 A07
Affl 0
0 A24 4s A08 A3 lt, 0
0 A23 0
A09 0 --c~ 1\26 .82 A16 O . licGfON: 0
0 A22 O ' A41
A10 0 A27 0
A15 0 A33 0
0 A2l 0 MO
All 0 A28 0
A14 0 A34 0
A1'2
A20 0 A39
A,3 A29 0
~9 A35 0
0 A3S 0
A30 0 A44
A36 0 A37 0
A43
-CELL48-
0 A42
-cELl 1-
0
AlOO 0
-CELL2-
0
0 A98 ASS
0 A53 0 BEACH REGION
0 A66
AS2 O AS! O 0
A65 0 MO o·
A64 O A49 0 -CELL3-0 0 A63 O A4S
A62
A67 A6S A:9 0 0
BouNo A70 A71
l<\Ry BETWEEN COVEP'B"
O •v, "'ACH A79 Afo 081 0
A AS2 0 A96 0 A95
0 0
A61 A60 Af
9 -covERED REG/ON-O 0
A72 AB 0
A74
0 A83
Af4
0
A47 0
A46
0
ASS 0 A57
0
A7S 0
A76
Al AS A?s 0
AS
AS'i 0 A90
-CELL4A-
A86 0
0 AB9
A87
0 A56
•
\
WHITE MESA MILL
BLANDING. UTAH
NESHAPS 2017
CELL3
FIRST QUARTER 2017
03/20/17-03/23/17
PREPARED FOR
ENERGY FUELS RESOURCES
LEGEND
A01 0 -SAMPLE LOCATION ON
COVERED AREAS
COl • -SAMPLE LOCATION ON
BEACH AREAS
FIGURE 2
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SCALE IN FEET ---200 100 0 200 400 ,,,,,o
ENVIRONMENTAL, LLC
THIS DRAWING ISTHE PROPERTY OFTELLCO
ENVIRONMENTAL, LLC, AND IS NOTTO BE
REPRODUCED, MODIFIED OR USED FOR ANY
OTHER PROJECT OR EXTENSION OF THIS PROJECT
EXCEPT BY AGREEMENT WITH TELLCO.
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ATTACHMENT 2
Tellco Report for Radon Flux Monitoring
April 2017
------------------------------~-----
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National Emission Standards for Hazardous Air Pollutants.
2017 Radon Flux Measurement Program
White Mesa Mill
6425 South Highway 191
Blanding, Utah 84511
2nd Quarter 2017 Sampling Results
Cell3
Prepared for: Energy Fuels Resources (USA) Inc.
6425 S. Highway 191
P.O.Box809
Blanding, Utah 84511
Prepared by: Tellco Environmental
P.O. Box 3987
Grand Junction, Colorado 81502
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TABLE OF CONTENTS
Page
1. INTRODUCTION ........................................................................................................................... 1
2. SITE DESCRIPTION ...................................................................................................................... 1
3. REGULATORY REQUIREMENTS FOR THE SITE .................................................................... 1
4. SAMPLING METHODOLOGY ..................................................................................................... 2
5. FIELD OPERATIONS .................................................................................................................... 2
5. I Equipment Preparation ........................................................................................................ 2
5.2 Sample Locations, Identification, and Placement ............................................................. 3
5.3 Sample Retrieval ................................................................................................................ 3
5.4 Environmental Conditions ................................................................................................ 3
6. SAMPLE ANALYSIS ..................................................................................................................... 4
6.1 Apparatus ..........................................................•......•............•............................................ 4
6.2 Sample Inspection and Documentation ............................................................................. 4
6.3 Background and Sample Counting .................................................................................... 4
7. QUALITY CONTROL (QC) AND DATA VALIDATION ........................................................... 5
7 .1 Sensitivity ........................................................................................................................... 5
7 .2 Precision .............................................................................................................................. 5
7 .3 Accuracy ................................................................................................................... -•.......• 6
7 .4 Completeness ...................................................................................................................... 6
8. CALCULATIONS ..................... ,, ............................................................•....................................... 6
9. RESULTS .......................................................................................................................................... 7
9.1 Mean Radon Flux .... :·········································································································· 7
9 .2 Site Results .......... ···········"'···································································································· 8
References .................................................................................................................................................. 9
Fig-ure I .................................................................................................................................................. 10
Appendix A. Charcoal Canister Analyses Support Documents
Appendix B. Recount Data Analyses
Appendix C. Radon Flux Sample Laboratory Data, Including Blanks
Appendix D. Sample Locations Map (Figure 2)
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1. INTRODUCTION
During April 17-18, 2017 Tellco Environmental, LLC (Tellco) of Grand Junction, Colorado, provided
support to Energy Fuels Resources (USA) Inc. (Energy Fuels) to conduct radon flux measurements at
its White Mesa Mill site regarding the required National Emission Standards for Hazardous Air
Pollutants (NESHAPs) Radon Flux Measurements. These measurements are required of Energy Fuels
to show compliance with Federal Regulations (further discussed in Section 3 below). The standard is
not an average per facility, but is an average per radon source. The standard allows mill owners or
operators the option of either making a single set of measurements or making measurements over a
one year period (e.g., weekly, monthly, or quarterly intervals). For the calendar year 2017, Energy
Fuels is conducting the radon flux measurements for Cell 3 at quarterly intervals.
Tellco was contracted to provide radon canisters, equipment and canister placement personnel, as well
as lab . analysis of samples. Energy Fuels personnel provided support for loading and unloading
charcoal from the canisters. This report details the procedures employed by Energy Fuels and Tellco
to obtain the results presented in Section 9.0 of this report. This report presents the results of the
·second quarter 201 7 radon flux measurements for Cell 3.
2. SITE DESCRIPTION
The White Mesa Mill facility is located in San Juan County in southeastern Utah, six miles south of
Blanding, Utah. The mill began operations in 1980 for the purpose of extracting uranium and
vanadium from feed stocks.
At the time of this second quarter 2017 sampling, Cell 3 had a total area of 288,858 m2 and was
comprised of two source regions that require NESHAPs radon flux monitoring: af proximately
259,292 m2 of interim soil cover of varying thickness and approximately 26,165 m of exposed
tailings beaches. The remaining approximately 3,401 m2 was covered by standing liquid in lower
elevation areas.
3. REGULATORY REQUIREMENTS FOR THE SITE
Radon emissions from the uranium mill tailings at this site are regulated by the State of Utah's
Department of Environmental Quality, Division of Air Quality under generally applicable standards
set by the Environmental Protection Agency (EPA) for Operating Mills. Applicable regulations are
specified in 40 CFR Part 61, Subpart W, National Emission Standards for Radon Emissions from
Operating Mill Tailings, with technical procedures in Appendix B. At present, there are no Subpart T
uranium mill tailings at this site. These regulations are a subset of the NESHAPs. According to
subsection 61.252 Standard, (a) radon-222 emissions to ambient air from an existing uranium mill
tailings pile shall not exceed an average of 20 pCi/m2-s for each pile, or cell. Subsection 61.253,
Determining Compliance, states that: "Compliance with the emission standard in this subpart shall be
determined annually through the use of Method 115 of Appendix B."
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4. SAMPLING METHODOLOGY
Radon emissions were measured using Large Area Activated Charcoal Canisters (canisters) in
conformance with 40 CFR, Part 61, Appendix B, Method 115, Restrictions to Radon Flux
Measurements, (EPA, 2016). These are passive gas adsorption sampling devices used to determine
the flux rate of radon-222 gas from a surface. The canisters were constructed using a 10-inch
diameter PVC end cap containing a bed of 180 grams of activated, granular charcoal. The prepared
charcoal was placed in the canisters on a support grid on top of a Yz inch thick layer of foam and
secured with a retaining ring under 1 Yz jnches of foam (see Figure 1, page 10).
Two hundred sampling locations were distributed throughout Cell 3 ( comprised of two source regions
requiring monitoring) as depicted on the Sample Locations Map (see Figure 2, Appendix D). Each
charged canister was placed directly onto the surface (open face down) and exposed to the surface for
24 hours. Radon gas adsorbed onto the charcoal and the subsequent radioactive decay of the
entrained radon resulted in radioactive lead-214 and bismuth-214. These radon progeny isotopes emit
characteristic gamma photons that can be detected through gamma spectroscopy. The original total
activity of the adsorbed radon was calculated from these gamma ray measurements using calibration
factors derived from cross-calibration of standard sources containing known total activities of
radium-226 with geometry identical to the counted samples and from the principles of radioactive
decay.
After approximately 24 hours, the exposed charcoal was transferred to a sealed plastic sample
container (to prevent sample loss and/or further exposure during transport), identified and labeled, and
transported to the Tellco laboratory in Grand Junction, Colorado for analysis.
5. FIELD OPERATIONS
5.1 Equipment Preparation
All charcoal was dried at 110°C before use in the field. Unused charcoal and recycled charcoal were
treated the same. 180-gram aliquots of dried charcoal were weighed and placed in sample containers.
Proper balance operation was verified daily by checking a standard weight. The balance readout
agreed with the known standard weight to within± 0.1 percent.
After acceptable balance check, empty containers were individually placed on the balance and the
scale was re-zeroed with the container on the balance. Unexposed and dried charcoal was carefully
added to the container until the readout registered 180 grams. The lid was immediately placed on the
container and sealed with plastic tape. The balance was checked for readout drift between readings.
Sealed containers with unexposed charcoal were placed individually in the shielded counting well,
with the bottom of the container centered over the detector, and the background count rate was
documented. Three five-minute background counts were conducted on ten percent of the containers,
selected at random to represent the "batch". If the background counts were too high to achieve an
acceptable lower limit of detection (LLD), the entire charcoal batch was labeled non-conforming and
recycled through the heating/drying process.
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5.2 Sample Locations, Identification, and Placement
On April 17, 2017, one hundred sampling locations were distributed throughout the Cell 3 Covered
regions, and one hundred sampling locations were distributed throughout the Cell 3 Beaches region.
An individual ID was assigned to each sample point, using a sequential alphanumeric system
indicating the charcoal batch and physical location within the region (e.g., D01 ... El00). This ID was
written on an adhesive label affixed to the top of the canister. The sample ID, date, and time of
placement were recorded on the radon flux measurements data sheets for each one-hundred
measurement set.
Prior to placing a canister at each sample location, the retaining ring, screen, and foam pad of each
canister were removed to expose the charcoal support grid. A pre-measured charcoal charge was
selected from a batch, opened and distributed evenly across the support grid. The canister was then
reassembled and placed face down on the surface at each sampling location. Care was exercised not
to push the device into the soil surface. The canister rim was "sealed" to the surface using a berm of
local borrow material.
Five canister blanks were similarly processed for each sample set (ten blanks total) and the canisters
were kept inside an airtight plastic bag during the 24-hour testing period.
5.3 Sample Retrieval
On April 18, 2017, at the end of each of the 24-hour testing periods, the canisters were retrieved,
disassembled and each charcoal sample was individually poured through a funnel into a container.
Identification numbers were transferred to the appropriate container, which was sealed and placed in a
box for transport. Retrieval date and time were recorded on the same data sheets as the sample
placement information. The blank samples were similarly processed.
All of the radon flux samples from the Cell 3 Beach region and all of the radon flux samples from the
Cell 3 Cover regions were successfully retrieved and subsequently containerized during the unloading
process, for a total of 200 radon flux samples.
Upon completion of on-site activities, the field equipment was alpha and beta-gamma scanned by
Energy Fuels Radiation Safety personnel and released for unrestricted use.
Tellco personnel maintained custody of the samples from collection through analysis.
5.4 Environmental Conditions
A rain gauge and thermometer were placed by Cell 3 to monitor rainfall and air temperatures during
sampling in order to ensure compliance with the regulatory measurement criteria.
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In accordance with 40 CFR, Part 61, Appendix B, Method 115:
• Measurements were not initiated within 24 hours of rainfall.
• No rainfall occurred during the Cell 3 sampling periods.
• All of the canister seals remained intact during the sampling periods.
• The minimum ambient air temperature measured during the sampling of Cell 3 was
approximately 41 ° F and the ground was not frozen.
6. SAMPLE ANALYSIS
6.1 Apparatus
6.2
Apparatus used for the analysis:
• Single-or multi-channel pulse height analysis system, Ludlum Model 2200 with a
Teledyne 3" x 3" sodium iodide, thallium-activated (Nal(Tl)) detector.
• Lead shielded counting well approximately 40 cm deep with 5-cm thick lead walls and a 7-
cm thick base and 5 cm thick top.
• National Institute of Standards and Technology (NIST) traceable aqueous solution radium-
226 absorbed onto 180 grams of activated charcoal.
• Ohaus Port-0-Gram balance with 0.1-gram sensitivity.
Sample Inspection and Documentation
Once in the laboratory, the integrity the samples was verified by visual inspection of the sample
containers. Laboratory personnel checked the containers and verified that the data sheet was
complete.
No damaged or unsealed containers were observed during inspection at the Tellco analytical
laboratory. A total of200 samples and ten blanks for Cell 3 were ultimately verified as valid.
6.3 Background and Sample Counting
The gamma ray counting system was checked daily, including background and radium-226 source
measurements prior to and after each counting session. Based on calibration statistics, using two
sources with known radium-226 content, background and source control limits were established for
each Ludlum/feledyne counting system with shielded well (see Appendix A).
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Gamma ray counting of exposed charcoal samples included the following steps:
• The length of count time was determined by the activity of the sample being analyzed,
according to a data quality objective of a minimum of 1,000 accrued counts for any given
sample.
• The sample container was centered on the Nal detector and the shielded well door was
closed.
• The sample was counted over a determined count length and then the mid-sample count
time, date, and gross counts were documented on the radon flux measurements data sheet
and used in the calculations.
• The above steps were repeated for each exposed charcoal sample.
• Approximately 10 percent of the containers counted were selected for recounting. These
containers were recounted within a few days following the original count.
7. QUALITY CONTROL (QC) AND DATA VALIDATION
Charcoal flux measurement QC samples included the following intra-laboratory analytical :frequency
objectives:
• Blanks, 5 percent, and
• Recounts, 10 percent
All sample data were subjected to validation protocols that included assessments of sensitivity,
precision, accuracy, and completeness. As described below, all Method 115-required data quality
objectives (EPA, 2016) were attained.
7.1 Sensitivity
A total of ten blanks were analyzed by measuring the radon progeny activity in samples subjected to
all aspects of the measurement process, excepting exposure to the source region. These blank sample
measurements comprised approximately five percent of the field measurements. The results of the
blank sample radon flux rates ranged from 0.01 to 0.05 pCi/m2-s, with an average of approximately
0.03 pCi/m2-s. The lower limit of detection (LLD) was approximately 0.03 pCi/m2-s.
7 .2 Precision
Twenty recount measurements, distributed throughout the sample sets, were performed by replicating
analyses of individual field samples (see Appendix B). These recount measurements comprised
approximately 10 percent of the total number of samples analyzed. The precision of Cell 3 recount
measurements above 1 pCi/m2-sec, expressed as relative percent difference (RPO), ranged from less
than 0.1 percent to 5.4 percent with an average precision of approximately 2.4 percent RPD. This
.complies with the precision objective of 10 percent.
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7.3 Accuracy
Accuracy of field measurements was assessed daily by counting two laboratory control samples with
known Ra-226 content. Accuracy of these lab control sample measurements, expressed as percent
bias, ranged from approximately -1.3 percent to +0.8 percent. The arithmetic average bias o_f the lab
control sample measurements was approximately +0.1 percent (see Appendix A). This complies with
the accuracy objective of+/-10 percent bias.
7.4 Completeness
A combined total of 200 samples were verified, representing 100 percent completeness for Cell 3,
which complies with the completeness objective of 85 percent.
8. CALCULATIONS
Radon flux rates were calculated for charcoal collection samples using calibration factors derived
from cross-calibration to sources with known total activity with identical geometry as the charcoal
containers. A yield efficiency factor was used to calculate the total activity of the sample charcoal
containers. Individual field sample result values presented were not reduced by the results of the field
blank analyses.
In practice, radon flux rates were calculated by a database computer program. The algorithms utilized
by the data base program were as follows:
Equation 8.1:
where:
pCi Rn-222/m2sec = ffs• A *b*~.5Ml.fflj
N
Ts
b
d
A
= net sample cm.mt rate, cpm under 220-662 ke V peak
= sample duration, seconds
= instrument calibration factor, cpm p_er pCi; values used:
0.1698, for M-01/D-21 and
0.1697, for M-02/D-20
= decay time, elapsed hours between sample mid-time and count mid-time
= area of the canister, m2
Equation 8.2:
Gross Sample, cpm Background Sample,cpm 1--------+---------
SampleCount,t,min Background Count,t,min
Error,2o-= 2X ---------------------x Sample Concentration
Net,cpm
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Equation 8.3:
LLD:; 2,71 +(4,6~ [Ts• A *b*O. ·'S>j
where: 2.71 = constant
4.65 = confidence interval factor
Sb = standard deviation of the background count rate
Ts = sample duration, seconds
b = instrument calibration factor, cpm per pCi; values used:
0.1698, forM-01/D-21 and
0.1697, forM-02/D-20
d = decay time, elapsed hours between sample mid-time and count mid-time
A = area of the canister, m2
9. RESULTS
9.1 Mean Radon Flux
Referencing 40 CFR, Part 61, Subpart W, Appendix B, Method 115 -Monitoring for Radon-222
Emissions, Subsection 2.1.7 -Calculations, "the mean radon flux for each region of the pile and for
the total pile shall be calculated and reported as follows:
(a) The individual radon flux calculations shall be made as provided in Appendix A EPA
86(1 ). The mean radon flux for each region of the pile shall be calculated by summing all
individual flux measurements for the region and dividing by the total number of flux
measurements for the region.
(b) The mean radon flux for the total uranium mill tailings pile shall be calculated as follows:
M! + · · · JzA~ [+]···Ji&
At
Where: Js = Mean flux for the total pile (pCi/m2-s)
Ji = Mean flux measured in region i (pCi/m2 -s)
Ai = Area ofregion i (m2)
Ai = Total area of the pile (m2)"
40 CFR 61, Subpart W, Appendix B, Method 115, Subsection 2.1.8, Reporting states "The results of
individual flux measurements, the approximate locations on the pile, and the mean radon flux for each
region and the mean radon flux for the total stack [pile] shall be included in the emission test report. Any
condition or unusual event that occurred during the measurements that could significantly affect the results
should be reported. 11
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9.2 Site Results
Site Specific Sample Results (reference Appendix C)
(a) The mean radon flux for each region within Cell 3 is as follows:
Cell 3 -Beaches Region = 66.6 pCi/m2-s (based on 26,165 m2 area)
Cell 3 -Covered Region = 5.7 pCi/m2-s (based on 259,292 m2 area)
Cell 3 -Water Region = 0.0 pCi/m2-s (based on 3,401 m2 area)
Note: Reference Appendix C of this report for the entire summary of individual measurement results.
(b) Using the data presented above, the calculated mean radon flux rate for Cell 3 is as follows:
Cell 3 = 11.1 pCi/m2-s
(66.6}(26,165)±(5.7)(259,292)+(0.0}(3,.401) = 11.1
288,858
As shown above, the arithmetic mean radon flux rate for Cell 3 for the second quarter 2017
sampling is below the NRC and EPA standard of 20 pCi/m2-s. Appendix C is a summary of
individual measurement results, including blank sample analysis.
No condition or unusual event occurred during the measurements that could significantly affect the
reported results.
Sample locations are depicted on Figure 2, which is included in Appendix D. Figure 2 was produced
by Tellco.
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Figure 1
Large Area Activated Charcoal Canisters Diagram
1/J.,n. ftJ•c:k
S..:.ri.i:.11~, Pa~
I , 2 • i, 1 Ti 1i,cc Cl1,c1rcva•
Sttpp~l Grcl
' 10.,.n ...
PYCfndC,111
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Appendix A
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Charcoal Canister Analyses Support Documents
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-------------------
ENERGY FUELS RESOURCES
WHITE MESA MILL, BLANDING, UTAH
2017 NESHAPs RADON FLUX MEASUREMENTS
CELL3
SAMPLING DATES: 04/17/17-04/18/17
ANALYSIS DATES: 04/19/17-04/20/17
SYSTEM COUNT Bkg Counts (1 min. each)
1.0. DATE #1 #2
M-01/D-21 4/19/2017 139 116
M-01/D-21 4/19/2017 137 118
M-01/0-21 4/19/2017 136 145
M-01/D-21 4/19/2017 146 135
M-01/0-21 4/20/2017 139 116
M-01/0-21 4/20/2017 137 118
M-01/0-21 4/20/2017 136 145
M-01/0-21 4/20/2017 146 135
M-02/0-20 4/19/2017 119 121
M-02/0-20 4/19/2017 133 119
M-02/0-20 4/19/2017 125 129
M-02/0-20 4/19/2017 131 133
M-02/0-20 4/20/2017 119 121
M-02/D-20 4/20/2017 133 119
M-02/D-20 4/20/2017 125 129
M-02/0-20 4/20/2017 131 133
#3
159
140
132
139
159
140
132
139
123
138
140
122
123
138
140
122
ACCURACY APPRAISAL T"BLE
SECOND QUARTER 2017
Source Counts (1 min. each)
#1 #2 #3
10305 10353 10162
10102 10007 10127
10268 10075 10282
10212 10273 10381
10264 10342 10177
10202 10246 10103
10210 10203 10279
10267 10040 10191
10171 10325 10275
10179 10311 10247
10222 10166 10334
10086 10293 10188
10176 10164 10318
9939 10042 10217
10093 10295 10295
10117 10200 10106
AVG NET YIELD FOUND SOURCE
cpm cpm/pCi pCi ID
10135 0.1698 59690 GS-04
9947 0.1698 58581 GS-04
10071 0.1698 59309 GS-04
10149 0.1698 59768 GS-04
10123 0.1698 59617 GS-05
10052 0.1698 59199 GS-05
10093 0.1698 59441 GS-05
10026 0.1698 59046 GS-05
10136 0.1697 59729 GS-04
10116 0.1697 59609 GS-04
10109 0.1697 59572 GS-04
10060 0.1697 59283 GS-04
10098 0.1697 59507 GS-05
9936 0.1697 58550 GS-05
10096 0.1697 59495 GS-05
10012 0.1697 59000 GS-05
AVERAGE PERCENT BIAS FOR ALL ANALYTICAL SESSIONS:
KNOWN %BIAS
pCi
59300 0.7%
59300 -1.2%
59300 0.0%
59300 0.8%
59300 0.5%
59300 -0.2%
59300 0.2%
59300 -0.4%
59300 0.7%
59300 0.5%
59300 0.5%
59300 0.0%
59300 0.3%
59300 -1.3%
59300 0.3%
59300 -0.5%
0.1%
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Po~+ I, 1'rl-
fos+
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CHARCOAL CANISTER ANALYSIS SYSTEM
SITE LOCATION: w~~+e Mh.;~ ""~''. -a1,,11 J ~ "'i) LA+~"
CLIENT: EV\ -e~7 F~-e\s ResvtAv--ce.s Cu. SA)
Cabmatign Qteck XA&
Calibration Date: / / 14 { I ti' Due Date: I/, '1' L I '1
High Voltage: \ \ la?} Window: 4.42 Thrshld: 2.20
System ID: M .. 0 I / 1J ~ ;2.. l
Scaler SIN: 5 I 5 '1 ;l..
Detector SIN: Q Y l 5 } "3 Source ID/SN: R.~ / &5-0 ~ Source Activity: S'O), 3 'I-. ~c
Blank Canister Bkgd. Range, cpm: 2 a = \Of) to tC,\ 3cr= O)t.\ to 11:f
Gross Source Range, cpm: v)O\L.\1 to I o4 5 ~ 3cr= !:')'o\9 to I 05\35
Technician: __ :;;?..,...__.?,.,.__.-.._ ____ ~~--~--
All counts times are one minute.
Date By Back2round Counts (1 min. each) Source Counts (1 min. each) ok?
#1 #2 #3 Av2. #1 #2 #3 Average YIN
"f/1q I 11 D1L,. l ;o, II Jo 150) I ".la tO~n< 10~<;'~ 1 fJI ID'l-10·2:1 ", " --t/1~/ ,; r:XU, ,--;;,,.-, I I~ t40 I -:.,'"7_ 10, O'J-\0001 I 0t '2-, i 00"101 V
'1/?C>/ 1? VU,, ,-.,,,, .. I U.::;' t '37-[J ,(:\ I 0:1, .. ~ f ()07,:;; 102.~")... I 0"'1../J A V
4/ 'J-() I,-, 'Ol C. JL,H:.W 1:>5 I ""?Gl I l ~n f O?--r"2-la·,,~ I 0301 l 01..f\O) v
'
Y /N: Y = average background and source cpm falls within the control limits.
N = average background and source cpm does not fall within the control limits.
The acceptable ranges were determined from prior background and source check data.
--·---- -------- ---·--CLIENT: ENERGY FUELS RESOURCES PROJECT: RADON FLUX MEASUREMENTS, WHITE MESA MILL PROJECT NO.: 17004.02
PILE:3 BATCH:D SURFACE: SOIL AIR TEMP MIN: 41 °F WEATHER: NO RAIN
AREA:BEACH DEPLOYED: 4 17 17 RETRIEVED: 4 18 17 CHARCOAL 8KG: 146 cpm Wt. Out: 180.0 g.
FIELD TECHNICIANS: CE,DLC, CS, TE COUNTED BY: DLC DATA ENTRY BY: DLC TARE WEIGHT: 29.2 g.
COUNTING SYSTEM I.D.: M01/D21, M02/D20 CAL. DUE: 7/14/17
CF:lT :Si\MFLE DEPLOY RETRIV .lJs.NALYSIS MID-TIME CNT GROSS GROSS RADON ± LLD
LCC,\T.ICN I. D. HR MIN HR MIN MO DA YR HR MIN (MIN) COUNTS WT IN pCi/m•s pC:./m's pCi/m's COMMENTS:
D38 D38 7 59 7 51 4 19 17 12 27 1 18529 213.4 32.6 3.3 0.03
D39 D39 8 1 7 51 4 19 17 12 28 1 36070 217.4 63.7 6.4 0.03
D40 D40 8 2 7 52 4 19 17 12 28 1 30497 217.5 53.8 5.4 0.03
D41 D41 8 4 7 52 4 19 17 12 30 1 19571 208.4 34.5 3.4 0.03
D42 D42 8 6 7 53 4 19 17 12 30 1 24027 215.5 42.4 4.2 0.03
D43 D43 8 7 7 53 4 19 17 12 31 1 29596 218.7 52.3 5.2 0.03
D44 D44 8 9 7 54 4 19 17 12 31 1 30203 213.7 53.5 5.3 0.03
D45 D45 8 10 7 54 4 19 17 12 33 1 23134 213.9 40.9 4.1 0.03
D46 D46 8 12 7 55 4 19 17 12 33 1 41536 217.6 73.7 7.4 0.03
D47 D47 8 14 7 55 4 19 17 12 34 1 26752 214.5 47.4 4.7 0.03
D48 D48 8 15 7 56 4 19 17 12 34 1 13921 212.9 24.6 2.5 0.03
D49 D49 8 17 7 56 4 19 17 12 36 1 19695 213.4 34.9 3.5 0.03
DSO D50 8 18 7 57 4 19 17 12 36 1 24399 217.7 43.3 4.3 0.03
D51 D51 7 40 7 45 4 19 17 12 37 1 22922 217.2 40.1 4.0 0.03
D52 D52 7 42 7 45 4 19 17 12 37 1 27271 217.7 47.8 4.8 0.03
D53 D53 7 43 7 46 4 19 17 12 39 1 9675 221.2 16.8 1. 7 0.03
D54 D54 7 45 7 46 4 19 17 12 39 1 26936 216.7 47.3 4.7 0.03
D55 D55 7 46 7 47 4 19 17 12 40 1 18641 219.4 32.6 3.3 0.03
D56 D56 7 48 7 47 4 19 17 12 40 1 13459 220.2 23.5 2.4 0.03
D57 D57 7 so 7 48 4 19 17 12 42 1 12231 219.9 21.4 2.1 0.03
DSB D58 7 51 7 48 4 19 17 12 42 1 15038 220.8 26.4 2.6 0.03
D59 D59 7 53 7 49 4 19 17 12 43 1 49329 217.8 87.0 8.7 0.03
D60 D60 7 54 7 49 4 19 17 12 43 1 12093 217.4 21.2 2.1 0.03
D61 D61 7 56 7 50 4 19 17 12 45 1 18463 219.0 32.5 3.2 0.03
D62 D62 7 58 7 50 4 19 17 12 45 1 38547 225.2 68.2 6.8 0.03
D63 D63 7 59 7 51 4 19 17 12 46 1 12299 222.5 21. 6 2.2 0.03
D64 D64 8 1 7 51 4 19 17 12 46 l 14811 218.3 26.1 2.6 0.03
D65 D65 8 2 7 52 4 19 17 12 48 1 15765 214.4 27.8 2.8 0.03
D66 D66 8 4 7 52 4 19 17 12 48 1 10721 219.9 18.8 1.9 0.03
D67 D67 8 6 7 53 4 19 17 12 49 1 18084 215.2 31. 9 3.2 0.03
D68 D68 8 7 7 53 4 19 17 12 49 1 11262 216.7 19.8 2.0 0.03
D69 D69 8 9 7 54 4 19 17 12 51 l 13291 218.3 23.4 2.3 0.03
D70 D70 8 10 7 54 4 19 17 12 51 1 24271 217.7 43.1 4.3 0.03
D71 D71 8 12 7 55 4 19 17 12 52 1 10825 227.2 19.1 1.9 0.03
D72 D72 8 14 7 55 4 19 17 12 52 1 38176 222.0 68.0 6.8 0.03
D73 D73 8 15 7 56 4 19 17 12 54 1 50416 218.5 89.9 9.0 0.03
D74 D74 8 18 7 56 4 19 17 12 54 1 49831 218.9 89.0 8.9 0.03
Page 2 of 3
-- --- ---- -- -------CLIENT: ENERGY FUELS RESOURCES PROJECT: RADON FLUX MEASUREMENTS, WHITE MESA MILL PROJECT NO.: 17004.02
PILE:3 BATCH:D SURFACE: SOIL AIR TEMP MIN: 41 °F WEATHER: NO RAIN
AREA:BEACH DEPLOYED: 4 17 17 RETRIEVED: 4 18 17 CHARCOAL BKG: 146 cpm Wt. Out: 180.0 g.
FIELD TECHNICIANS: CE,DLC, CS, TE COUNTED BY: DLC DATA ENTRY BY: DLC TARE WEIGHT: 29.2 g.
COUNTING SYSTEM I.D.: M01/D21, M02/D20 CAL. DUE: 7/14/17
~;r,.. T[,' S}\0~PLE DEPLOY RETf~l~/ .i\t,IJ.:LY9 IS MI!) TIME Ct;JT GROSS (_}Rosg Ri\D0t1 -LLD
L(J(~f>. "~)N t. Li. H!~ ?-·!IN HR MIN ~f,) DA YR HR Ml!.,J (P1Il1} C(iUNTS WT IN !=-:Ci/rn pC1/IT,· ~:: pCi/:m C:'OMMENTS:
D75 D75 8 19 7 57 4 19 17 12 55 1 30260 218.8 53.9 5.4 0.03
D76 D76 7 40 7 45 4 19 17 12 55 1 32241 216.4 56.6 5.7 0.03
D77 D77 7 42 7 45 4 19 17 12 57 1 42078 217.2 74.0 7.4 0.03
D78 D78 7 43 7 46 4 19 17 12 57 1 32869 215.8 57.8 5.8 0.03
D79 D79 7 45 7 46 4 19 17 12 58 1 35482 220.1 62.5 6.2 0.03
D80 D80 7 46 7 47 4 19 17 12 58 1 19565 216.3 34.3 3.4 0.03
D8.l D81 7 48 7 47 4 19 17 13 0 1 22832 215.3 40.2 4.0 0.03
D82 D82 7 so 7 48 4 19 17 13 0 1 41681 219.2 73 .6 7.4 0.03
D83 D83 7 51 7 48 4 19 17 13 1 1 28780 217.6 50.8 5.1 0.03
D84 D84 7 53 7 49 4 19 17 13 1 1 30279 220.3 53.5 5.3 0.03
D85 D85 7 54 7 49 4 19 17 13 3 1 63393 217.1 112.3 11.2 0.03
D86 D86 7 56 7 50 4 19 17 13 3 1 35258 218.2 62.4 6.2 0.03
D87 D87 7 58 7 50 4 19 17 13 4 1 38446 221. 7 68.1 6.8 0.03
D88 D88 7 59 7 51 4 19 17 13 4 1 41660 217.7 73.9 7.4 0.03
D89 D89 8 l 7 51 4 19 17 13 6 1 28886 217.9 51.2 5.1 0.03
D90 D90 8 2 7 52 4 19 17 13 6 1 139727 221.3 248.7 24.9 0.03
D91 D91 8 4 7 52 4 19 17 13 7 1 97971 216.9 174.4 17.4 0.03
D92 D92 8 6 7 53 4 19 17 13 7 1 86134 221.2 153.5 15.4 0.03
D93 D93 8 7 7 53 4 19 17 13 9 1 55399 218.8 98.7 9.9 0.03
.D94 D94 8 9 7 54 4 19 17 13 9 1 12814 216.3 22.6 2.3 0.03
D95 D95 8 10 7 54 4 19 17 13 10 1 24265 214.1 43.1 4.3 0.03
D96 D96 8 12 7 55 4 19 17 13 10 1 8428 220.2 14.8 1. 5 0.03
D97 D97 8 14 7 55 4 19 17 13 12 1 19217 219.7 34.2 3.4 0.03
D98 D98 8 15 7 56 4 19 17 13 12 1 22536 224.6 40.1 4.0 0.03
D99 D99 8 17 7 56 4 19 17 13 13 1 14831 218.8 26.3 2.6 0.03
D100 DlOO 8 18 7 57 4 19 17 13 13 1 59715 216.5 106.9 10.7 0.03
AVERAGE RADON FLUX RATE FOR THE CELL 3 BEACH REGION: 66.6
BLANK CANISTER ANALYSIS: 248.7 MAX
c:rL~L' ::;_:\MPL:~.-HETRI~/ ANALYSl::~ !t,ID-TJME c:NT GROSS GROSS RADON ± LLD
LOCATION I. D. HR MIN HR MIN MO DA YR HR MIN (MIN) COUNTS WT IN pCi /m's pCi/m' s pCi/m' s COMMENTS:
D BLANK 1 D BLANK 1 7 30 8 2 4 19 17 10 33 10 1654 207.2
D BLANK 2 D BLANK 2 7 30 8 2 4 19 17 10 33 10 1680 206.5
D BLANK 3 D BLANK 3 7 30 8 2 4 19 17 10 47 10 1657 209.1
D BLANK 4 D BLANK 4 7 30 8 2 4 19 17 10 47 10 1734 208.3
D BLANK 5 D BLANK 5 7 30 8 2 4 19 17 10 59 10 1656 207.5
AVERAGE BLANK CANISTER ANALYSIS FOR THE CELL 3 BEACH REGION:
Page 3 of 3
0.03 0.02
0.04 0.02
0.03 0.02
0.05 0.02
0.03 0.02
0.04 ~Ci/m 2 s
0.03
0.03
0.03
0.03
0.03
CONTROL,
CONTROL
CONTROL
CONTROL
CONTROL
-
-- -·---- --- - -- ------CLIENT: ENERGY FUELS RESOURCES PROJECT: RADON FLUX MEASUREMENTS, WHITE MESA MILL PROJECT NO.: 17004.02
PILE: 3 BATCH:E SURFACE: SOIL AIR TEMP MIN: 41 °F WEATHER: CLEAR, NO RAIN
AREA:COVER DEPLOYED: 4 17 17 RETRIEVED: 4 18 17 CHARCOAL BKG: 143 cpm Wt. Out: 180.0 g.
FIELD TECHNICIANS: CE,DLC, CS, TE COUNTED BY: DLC DATA ENTRY BY: DLC TARE WEIGHT: 29.2 g.
COUNTING SYSTEM 1.0.: M01/D21, M02/D20 CAL. DUE: 7/14/17
•:;r: r :031\MPL,E DEF1LOY RE'TRI 1/ ;~'tt].:'\L'lSI l"fID-TIME c:rr GROSS (;Ross R]':..Di')l'J ± LL[;
LOCATION I. D. HR MIN HR MIN MO DA YR HR MIN (MIN} CCUNTS WT IN pCi/m 2 s pCi/m 2 s pCi/m's COMMENTS:
, .. ,
EOl EOl 8 20 8 30 4 19 17 1.3 20 1 1370 220.9 2.2 0.2 0.03
E02 E02 8 23 8 31 4 19 17 13 20 1 6377 219.0 10.9 1.1 0.03
E03 E03 8 26 8 32 4 19 17 13 21 1 1690 224.2 2.7 0.3 0.03
E04 E04 8 29 8 33 4 19 17 13 24 6 1102 217.9 0.1 0.0 0.03
E05 E05 8 32 8 34 4 19 17 13 30 3 1199 221.6 0.5 0.0 0.03
E06 E06 8 35 8 35 4 19 17 13 30 3 1083 219.4 0.4 0.0 0.03
E07 E07 8 20 8 30 4 19 17 13 34 3 1298 218.0 0.5 0.1 0.03
E08 E08 8 23 8 31 4 19 17 13 34 3 1088 217.7 0.4 0.0 0.03
E09 E09 8 26 8 32 4 19 17 13 38 4 1121 218.1 0.2 0.0 0.03
ElO ElO 8 29 8 33 4 19 17 13 37 2 1388 216.5 1. 0 0.1 0.03
Ell Ell 8 32 8 34 4 19 17 13 42 2 1444 216.6 1.0 0.1 0.03
E12 E12 8 35 8 35 4 19 17 13 42 3 1156 214.2 0.4 o.o 0.03
E13 E13 8 38 8 37 4 19 17 13 45 3 1349 219.1 0.5 0.1 0.03
E14 E14 8 41 8 38 4 19 17 13 44 1 1011 217.8 1.5 0.2 0.03
E15 E15 8 44 8 39 4 19 17 13 48 1 13687 219.2 24.0 2.4 0.03
E16 E16 8 47 8 40 4 19 17 13 49 3 1390 223.1 0.6 0.1 0.03
El7 E17 8 49 8 41 4 19 17 13 52 2 1178 218.6 0.8 0.1 0.03
E18 E18 8 52 8 42 4 19 17 13 52 2 1714 218.7 1. 3 0.1 0.03
E19 E19 8 38 8 37 4 19 17 13 55 3 1002 218.3 0.3 0.0 0.03
E20 E20 8 41 8 38 4 19 17 13 55 2 1050 220.6 0.7 0.1 0.03
E21 E21 8 44 8 39 4 19 17 13 59 3 1000 215.8 0.3 0.0 0.03
E22 E22 8 47 8 40 4 19 17 13 59 2 1246 217.7 0.9 0.1 0.03
E23 E23 8 49 8 41 4 19 17 14 2 3 1001 219.7 0.3 0.0 0.03
E24 E24 8 52 8 42 4 19 17 14 2 1 20840 217.6 36.9 3.7 0.03
E25 E25 8 55 8 44 4 19 17 14 5 1 6634 216.7 11.6 1.2 0.03
E26 E26 8 58 8 45 4 19 17 14 6 2 1531 219.0 1.1 0.1 0.03
E27 E27 9 1 8 46 4 19 17 14 8 1 1261 219.1 2.0 0.2 0.03
E28 E28 9 3 8 47 4 19 17 14 8 1 3585 220.3 6.2 0.6 0.03
E29 E29 9 6 8 48 4 19 17 14 9 1 6286 218.8 11. 0 1.1 0.03
E30 E30 9 9 8 49 4 19 17 14 10 3 1191 222.7 0.5 0.0 0.03
E31 E31 8 55 8 44 4 19 17 14 13 2 1484 219.2 1.1 0.1 0.03
E32 E32 8 58 8 45 4 19 17 14 13 1 2920 219.6 5.0 0.5 0.03 ', E33 E33 9 1 8 46 4 19 17 14 15 1 2836 219.8 4.8 0.5 0.03
E34 E34 9 3 8 47 4 19 17 14 15 1 7179 220.9 12.6 1.3 0.03
E35 E35 9 6 8 48 4 19 17 14 17 1 13699 220.7 24.3 2.4 0.03
E36 E36 9 9 8 49 4 19 17 14 18 3 1287 218.8 0.5 0.1 0.03
E37 E37 9 12 8 51 4 19 17 14 20 1 1003 220.8 1. 5 0.2 0.03
Page 1 of 3
- --- - - - - - ----- - - - - -CLIENT: ENERGY FUELS RESOURCES PROJECT: RADON FLUX MEASUREMENTS, WHITE MESA MILL PROJECT NO.: 17004.02
PILE: 3 BATCH: E SURFACE: SOIL AIR TEMP MIN: 41 °F WEATHER: CLEAR, NO RAIN
AREA:COVER DEPLOYED: 4 17 17 RETRIEVED: 4 18 17 CHARCOAL 8KG: 143 cpm Wt. Out: 180.0 g.
FIELD TECHNICIANS: CE,DLC, CS, TE COUNTED BY: DLC DATA ENTRY BY: DLC TARE WEIGHT: 29.2 g.
COUNTING SYSTEM 1.D.: M01/D21, M02/D20 CAL. DUE: 7/14/17
;r; :::-:\MPLE DEPLOY RETR IV P.N.1\I/::~r: ! S MID~ 'TIME CNT GROSS GROE?S RADON ± LLD
LOCATION I. D. HR MIN HR MIN MO DA YR HR MIN (MIN) COUNTS WT IN pCi/m's pCi/m's pCi/m's COMMENTS:
E38 E38 9 15 8 52 4 19 17 14 20 1 12277 216.6 21.8 2.2 0.03
E39 E39 9 12 8 51 4 19 17 14 22 1 12840 217.4 22.8 2.3 0.03
E40 E40 9 15 8 52 4 19 17 14 22 1 4322 221.2 7.5 0.8 0.03
E41 E41 9 17 8 53 4 19 17 14 24 2 1170 220.4 0.8 0.1 0.03
E42 E42 9 20 8 54 4 19 17 14 24 2 1131 220.2 0.8 0.1 0.03
E43 E43 9 17 8 54 4 19 17 14 25 2 1133 218.9 0.8 0.1 0.03
E44 E44 9 20 8 55 4 19 17 14 25 1 10651 217.1 18.9 1.9 0.03
E45 E45 8 25 8 30 4 19 17 14 27 2 1148 213.9 0.8 0.1 0.03
E46 E46 8 27 8 31 4 19 17 14 27 1 9769 219.7 17.1 1. 7 0.03
E47 E47 8 29 8 32 4 19 17 14 29 2 1047 216.2 0.7 0.1 0.03
E48 E48 8 31 8 33 4 19 17 14 29 1 13861 214.3 24.4 2.4 0.03
E49 E49 8 33 8 34 4 19 17 14 31 1 3603 218.6 6.2 0.6 0.03
E,50 ESO 8 35 8 35 4 19 17 14 32 3 1026 216.4 0.4 0.0 0.03
ESl ESl 8 37 8 36 4 19 17 14 34 1 10229 215.8 18.0 1.8 0.03
E52 E52 8 39 8 37 4 19 17 14 34 1 1000 221.1 1.5 0.2 0.03
E53 E53 8 41 8 38 4 19 17 14 35 1 1008 213.0 1.5 0.2 0.03
E54 E54 8 43 8 39 4 19 17 14 35 1 6625 215.9 11.6 1.2 0.03
ESS E55 8 45 8 40 4 19 17 14 37 1 1392 219.1 2.2 0.2 0.03
E56 E56 8 25 8 30 4 19 17 14 37 1 2374 219.4 4.0 0.4 0.03
E57 E57 8 27 8 31 4 19 17 14 38 1 1803 218.9 2.9 0.3 0.03
ESB E58 8 29 8 32 4 19 17 14 38 1 1082 215.4 1. 7 0.2 0.03
E59 E59 8 31 8 33 4 19 17 14 40 1 3214 215.7 5.5 0.5 0.03
E60 E60 8 33 8 34 4 19 17 14 41 2 1193 217.2 0.8 0.1 0.03
E61 E61 8 35 8 35 4 19 17 14 43 1 3320 216.4 5.7 0.6 0.03
E62 E62 8 37 8 36 4 19 17 14 43 1 2082 218.7 3.5 0.3 0.03
E63 E63 8 39 8 37 4 19 17 14 45 1 1284 215.2 2.0 0.2 0.03
E64 E64 8 41 8 38 4 19 17 14 45 2 1788 216.9 1.3 0.1 0.03
E65 E65 8 43 8 39 4 19 17 14 47 2 1055 214.6 0.7 0.1 0.03
E66 E66 8 45 8 40 4 19 17 14 47 2 1652 214.5 1.2 0.1 0.03
E67 E67 8 47 8 41 4 19 17 14 50 1 1374 214.8 2.2 0.2 0.03
E68 E68 8 49 8 42 4 19 17 14 50 2 1041 213.2 0.7 0.1 0.03
E69 E69 8 51 8 43 4 19 17 14 52 1 13527 220.3 24.0 2.4 0.03
E70 E70 8 53 8 44 4 19 17 14 52 1 1157 215.l 1.8 0.2 0.03
E71 E71 8 55 8 45 4 19 17 14 53 1 2808 218.7 4.8 0.5 0.03
E72 E72 8 57 8 46 4 19 17 14 53 1 1498 215.4 2.4 0.2 0.03
E73 E73 8 59 8 47 4 J.9 17 14 55 1 10941 213.9 19.4 1.9 0.03
E74 E74 9 1 8 48 4 19 17 14 55 1 1455 214.3 2.4 0.2 0.03
Page 2 of 3
- ---- -- --- - -- -- - --CLIENT: ENERGY FUELS RESOURCES PROJECT: RADON FLUX MEASUREMENTS, WHITE MESA MILL PROJECT NO.: 17004.02
PILE:3 BATCH:E SURFACE: SOIL AIR TEMP MIN: 41 °F WEATHER: CLEAR, NO RAIN
AREA:COVER DEPLOYED: 4 17 17 RETRIEVED: 4 18 17 CHARCOAL BKG: 143 cpm Wt. Out: 180.0 g.
FIELD TECHNICIANS: CE,DLC, CS, TE COUNTED BY: DLC DATA ENTRY BY: DLC TARE WEIGHT: 29.2 g.
COUNTING SYSTEM I.D.: M01/D21, M02/D20 CAL. DUE: 7/14/17
1.~::", I 2',AMf·t .. E l:'Ef,LGY ?.ETRI'l l~.N~h..LYSI~; MIC· TIME CNT f.?rPC<-3S (:}ROf:S Pl\DO!·;; LLD
(\ ·---.;,::: "';r: i . ~:. HF r-1 IN HR !·!IN MO Dli YR HR MIN ( M Ill} COUNT'S ~\T IN i /rn ~ ::::~ .:.. / :n ;;:; pc: i 17;. c~·c1r-11{ENTS:
E75 E75 9 3 8 49 4 19 17 14 57 1 1374 218.1 2.2 0.2 0.03
E76 E76 9 5 8 50 4 19 17 14 58 3 1008 216.4 0.3 0.0 0.03
E77 E77 9 7 8 51 4 19 17 15 0 l 6655 216.7 11. 7 1.2 0.03
E78 E78 8 47 8 41 4 19 17 15 0 1 1702 199.9 2.8 0.3 0.03
E79 E79 8 49 8 42 4 19 17 15 2 1 10998 216.5 19.5 1.9 0.03
EBO EBO 8 51 8 43 4 19 17 15 2 1 3207 218.0 5.5 0.5 0.03
E81 E81 8 53 8 44 4 19 17 15 3 1 6797 216.9 11.9 1.2 0.03
E82 E82 B 55 8 45 4 19 17 15 3 l 4563 218.9 7.9 0.8 0.03
E83 E83 8 57 8 46 4 19 17 15 5 1 4280 215.6 7.4 0.7 0.03
E84 E84 8 59 8 47 4 19 17 15 5 1 6272 218.8 11.0 1.1 0.03
E85 E85 9 1 8 48 4 19 17 15 7 1 9555 214.8 16.9 1. 7 0.03
E86 E86 9 3 8 49 4 19 17 15 7 2 1398 216.7 1.0 0.1 0.03
E87 E87 9 5 8 50 4 19 17 15 9 1 2671 214.3 4.6 0.5 0.03
E88 E88 9 7 8 51 4 19 17 15 9 2 1005 214.3 0.6 0.1 0.03
E89 E89 9 9 8 52 4 19 17 15 11 1 2878 213.1 4.9 0.5 0.03
E90 E90 9 9 8 52 4 19 17 15 11 1 2369 214.5 4.0 0.4 0.03
E91 E91 9 11 8 53 4 19 17 15 13 2 1451 216.6 1.1 0.1 0.03
E92 E92 9 11 8 53 4 19 17 15 13 2 1344 213.8 1. 0 0.1 0. 03
E93 E93 9 13 8 54 4 19 17 15 15 1 1495 219.8 2.4 0.2 0.03
E94 E94 9 13 8 54 4 19 17 15 15 1 3036 217.0 5.2 0.5 0.03
E95 E95 9 15 8 55 4 19 17 15 16 1 3020 213.8 5.2 0.5 0.03
E96 E96 9 15 8 55 4 19 17 15 16 1 1535 215.9 2.5 0.3 0.03
E97 E97 9 17 8 56 4 19 17 15 18 1 8454 215.6 15.0 1.5 0.03
E98 E98 9 19 8 57 4 19 17 15 18 2 1020 213.1 0.7 0.1 0.03
E99 E99 9 20 8 58 4 19 17 15 20 1 3235 212.5 5.6 0.6 0.03
ElOO ElOO 9 21 8 58 4 19 17 15 20 1 1171 220.7 1. 9 0.2 0.03
AVERAGE RADON FLUX RATE FOR THE CELL 3 COVER REGION: 5.7
BLANK CANISTER ANAL YSJS: 36.9 MAX
~~FI!:) S.:\.1:•fF;LE EETF.!\T AJ\Il\.LYSI~? MID-·1'I!0·7E CNT GROSS GROSS RAL10N + LLD
LOCATION I. D. HR MIN HR MIN MO DJ.. YR HR MIN (MIN) COUNTS WT IN pCi/m' s pCi-/m' s /m's COMMEkTs:
E BLANK :l E BLANK 1 7 39 a 25 4 19 17 9 10 10 1467 208.1
E BLANK 2 E BLANK 2 7 39 a 25 4 19 17 9 10 10 1540 208.0
E BLANK 3 E BLANK 3 7 39 8 25 4 19 17 9 23 10 1471 207.3
E BLANK 4 E BLANK 4 7 39 8 25 4 19 17 9 23 10 1486 207.5
E BLANK 5 E BLANK 5 7 39 a 25 4 19 17 9 36 10 1529 208.1
AVERAGE BLANK CANISTER ANALYSIS FOR THE CELL 3 COVER REGION:
Page 3 of 3
0.01 0.02
0.02 0.02
0.01 0.02
0.01 0.02
0.02 0.02
0.01 i,Ci/rn 2 s
0.03
0.03
0.03
0.03
0.03
CONTROL
CONTROL
CONTROL
CONTROL
CONTROL
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AppendixD
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Sample Locations Map (Figure 2)
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WHITE MESA MILL
BLANDING. UTAH
NESHAPS 2017
CELL3
SECOND QUARTER 2017
04/17/17-04/18/17
PREPARED FOR
ENERGY FUELS RESOURCES
LEGEND
E01 O • SAMPLE LOCATION ON
COVERED AREAS
001 • • SAMPLE LOCATION ON
BEACH AREAS
FIGURE2
N
t
SCALE IN FEET ----200 100 0 200 400 ,,,,,,
ENVIRONMENTAL, LLC
THIS DRAWING IS THE PROPERTY OFTELLCO
ENVIRONMENTAL, LLC, AND IS NOTTO BE
REPRODUCED, MODIFIED OR USED FOR ANY
OTHER PROJECT OR EXTENSION OF THIS PROJECT
EXCEPT BY AGREEMENT WITH TELLCO.
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AITACHMENT 3
Tellco Report for Radon Flux Monitoring
July 2017
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National Emission Standards for Hazardous Air Pollutants
2017 Radon Flux Measurement Program
White Mesa Mill
6425 South Highway 191
Blanding, Utah 84511
3rd Quarter 2017 Sampling Results
Cell3
Prepared for: Energy Fuels Resources (USA) Inc.
6425 S. Highway 191
P.O.Box 809
Blanding, Utah 84511
Prepared by: Tellco Environmental
P.O. Box 3987
Grand Junction, Colorado 81502
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TABLE OF CONTENTS
Page
1. INTRODUCTION ........................................................................................................................... 1
2. SITE DESCRIPTION ...................................................................................................................... 1
3. REGULATORY REQUIREMENTS FOR THE SITE .................................................................... 1
4. SAMPLING METHODOLOGY ..................................................................................................... 2
5, FIELD OPERATIONS .................................................................................................................... 2
5.1 Equipment Preparation ....................................................................................................... 2
5.2 Sample Locations, Identification, and Placement. ............................................................ 3
5.3 Sample Retrieval ............................................................................................................... 3
5 .4 Environmental Conditions ................................................................................................ 3
6. SAMPLE ANALYSIS ..................................................................................................................... 4
6.1 Apparatus .......................................................................................................................... ,. 4
6.2 Sample Inspection and Documentation ............................................................................. 4
6.3 Background and Sample Counting .................................................................................... 4
7. QUALITY CONTROL (QC) AND DATA VALIDATION ........................................................... 5
7 .1 Sensitivity ............................................................................................................................. 5
7 .2 Precision .........................•.......... -........................................................................................... 5
7.3 Accuracy ......................................................................................... " ....................................... 6
7 .4 Completeness ..................................................................................................................... 6
8. CALCULATIONS ........................................................................................................................... 6
9. RESULTS., ........................ ., ................................................................................................................. 7
9.1 Mean Radon Flux ................................................................................................................. 7
9.2 Site Results .............................................................................................................................. 8
References .................................................................... 11 ••••••• ,, ................................................................... 9
Figure 1 ............................................................................................................................................ · ... 10
Appendix A. Charcoal Canister Analyses Support Documents
Appendix B. Recount Data Analyses
Appendix C. Radon Flux Sample Laboratory Data, Including Blanks
Appendix D. Sample Locations Map (Figure 2)
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1. INTRODUCTION
During July 16-17, 2017 Tellco Environmental, LLC (Tellco) of Grand Junction, Colorado, provided
support to Energy Fuels Resources (USA) Inc. (Energy Fuels) to conduct radon flux measurements at
its White Mesa Mill site regarding the required National Emission Standards for Hazardous Air
Pollutants (NESHAPs) Radon Flux Measurements. These measurements are required of Energy Fuels
to show compliance with Federal Regulations (fhrther discussed in Section 3 below). The standard is
not an average per facility, but is an average per radon source. The standard allows mill owners or
operators the option of either making a single set of measurements or making measurements over a
one year period (e.g., weekly, monthly, or quarterly intervals). For the calendar year 2017, Energy
Fuels is conducting the radon flux measurements for Cell 3 at quarterly intervals.
Tellco was contracted to provide radon canisters, equipment and canister placement personnel, as well
as lab analysis of samples. Energy Fuels personnel provided support for loading and unloading
charcoal from the canisters. This report details the procedures employed by Energy Fuels and Tellco
to obtain the results presented in Section 9.0 of this report. This report presents the results of the third
quarter 2017 radon flux measurements for Cell 3.
2. SITE DESCRIPTION
The White Mesa Mill facility is located in San Juan County in southeastern Utah, six miles south of
Blanding, Utah. The mill began operations in 1980 for the purpose of extracting uranium and
vanadium from feed stocks.
At the time of this third quarter 2017 sampling, Cell 3 had a total area of 288,858 m2 and was
comprised of two source regions that require NESHAPs radon flux monitoring: af proximately
257,616 m2 of interim soil cover of varying thickness and approximately 29,016 m of exposed
tailings beaches. The remaining approximately 2,226 m2 was covered by standing liquid in lower
elevation areas.
3. REGULATORY REQUIREMENTS FOR THE SITE
Radon emissions from the uranium mill tailings at this site are regulated by the State of Utah's
Department of Environmental Quality, Division of Air Quality under generally applicable standards
set by the Environmental Protection Agency (EPA) for Operating Mills. Applicable regulations are
specified in 40 CFR Part 61, Subpart W, National Emission Standards for Radon Emissions from
Operating Mill Tailings, with technical procedures in Appendix B. At present, there are no Subpart T
uranium mill tailings at this site. These regulations are a subset of the NESHAPs. According to
subsection 61.252 Standard, (a) radon-222 emissions to ambient air from an existing uranium mill
tailings pile shall not exceed an average of 20 pCi/m2-s for each pile, or cell. Subsection 61.253,
Determining Compliance, states that: "Compliance with the emission standard in this subpart shall be
determined annually through the use of Method 115 of Appendix B."
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4. SAMPLING METHODOLOGY
Radon emissions were measured using Large Area Activated Charcoal Canisters (canisters) in
conformance with 40 CFR, Part 61, Appendix B, Method 115, Restrictions to Radon Flux
Measurements, (EPA, 2017). These are passive gas adsorption sampling devices used to determine
the flux rate of radon-222 gas from a surface. The canisters were constructed using a 10-inch
diameter PVC end cap containing a bed of 180 grams of activated, granular charcoal. The prepared
charcoal was placed in the canisters on a support grid on top of a Yi inch thick layer of foam and
secured with a retaining ring under 1 Y2 inches of foam (see Figure 1, page 10).
Two hundred sampling locations were distributed throughout Cell 3 ( comprised of two source regions
requiring monitoring) as depicted on the Sample Locations Map (see Figure 2, Appendix D). Each
charged canister was placed directly onto the surface (open face down) and exposed to the surface for
24 hours. Radon gas adsorbed onto the charcoal and the subsequent radioactive decay of the
entrained radon resulted in radioactive lead-214 and bismuth-214. These radon progeny isotopes emit
characteristic gamma photons that can be detected through gamma spectroscopy. The original total
activity of the adsorbed radon was calculated from these gamma ray measurements using calibration
factors derived from cross-calibration of standard sources containing known total activities of
radium-226 with geometry identical to the counted samples and from the principles of radioactive
decay.
After approximately 24 hours, the exposed charcoal was transferred to a sealed plastic sample
container (to prevent sample loss and/or further exposure during transport), identified and labeled, and
transported to the Tellco laboratory in Grand Junction, Colorado for analysis.
5. FIELD OPERATIONS
5.1 Equipment Preparation
All charcoal was dried at 110°C before use in the field. Unused charcoal and recycled charcoal were
treated the same. 180-gram aliquots of dried charcoal were weighed and placed in sample containers.
Proper balance operation was verified daily by checking a standard weight. The balance readout
agreed with the known standard weight to within± 0.1 percent.
After acceptable balance check, empty containers were individually placed on the balance and the
scale was re-zeroed with the container on the balance. Unexposed and dried charcoal was carefully
added to the container until the readout registered 180 grams. The lid was immediately placed on the
container and sealed with plastic tape. The balance was checked for readout drift between readings.
Sealed containers with unexposed charcoal were placed individually in the shielded counting well,
with the bottom of the container centered over the detector, and the background count rate was
documented. Three five-minute background counts were conducted on ten percent of the containers,
selected at random to represent the "batch". If the background counts were too high to achieve an
acceptable lower limit of detection (LLD), the entire charcoal batch was labeled non-conforming and
recycled through the heating/drying process.
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5.2 Sample Locations, Identification, and Placement
On July 16, 2017, one hundred sampling locations were distributed throughout the Cell 3 Covered
regions, and one hundred sampling locations were distributed throughout the Cell 3 Beaches region.
An individual ID was assigned to each sample point, using a sequential alphanumeric system
indicating the charcoal batch and physical location within the region (e.g., GOl ... HlOO). This ID was
written on an adhesive label affixed to the top of the canister. The sample ID, date, and time of
placement were recorded on the radon flux measurements data sheets for each one-hundred
measurement set.
Prior to placing a canister at each sample location, the retaining ring, screen, and foam pad of each
canister were removed to expose the charcoal support grid. A pre-measured charcoal charge was
selected from a batch, opened and distributed evenly across the support grid. The canister was then
reassembled and placed face down on the surface at each sampling location. Care was exercised not
to push the device into the soil surface. The canister rim was "sealed" to the surface using a berm of
local borrow material.
Five canister blanks were similarly processed for each sample set (ten blanks total) and the canisters
were kept inside an airtight plastic bag during the 24-hour testing period.
5.3 Sample Retri~val
On July 17, 2017, at the end of each of the 24-hour testing periods, the canisters were retrieved,
disassembled and each charcoal sample was individually poured through a funnel into a container.
Identification numbers were transferred to the appropriate container, which was sealed and placed in a
box for transport. Retrieval date and time were recorded on the same data sheets as the sample
placement information. The blank samples were similarly processed.
One of the samples (G73) from the Cell 3 Beach region was spilled during the unloading process. The
remaining 99 radon flux samples from the Cell 3 Beach region and all 100 samples from the Cell 3
Cover regions were successfully retrieved and containerized, for a total of 199 radon flux samples.
Upon completion of on-site activities, the field equipment was alpha and beta-gamma scanned by
Energy Fuels Radiation Safety personnel and released for unrestricted use.
Tellco personnel maintained custody of the samples from collection through analysis.
5.4 Environmental Conditions
A rain gauge and thermometer were placed by Cell 3 to monitor rainfall and air temperatures during
sampling in order to ensure compliance with the regulatory measurement criteria.
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In accordance with 40 CFR, Part 61, Appendix B, Method 115:
6.
6.1
• Measurements were not initiated within 24 hours of rainfall.
• Approximately 0.10 inches of rainfall occurred overnight during the Cell 3 sampling
period, after the canisters had been deployed.
• All of the canister seals were reported intact during the sample retrieval periods, and none
of the canisters were surrounded by water.
• The minimum ambient air temperature measured during the sampling of Cell 3 was
approximately 59° F and the ground was not frozen.
SAMPLE ANALYSIS
Apparatus
Apparatus used for the analysis:
• Single-or multi-channel pulse height analysis system, Ludlum Model 2200 with a
Teledyne 3" x 3" sodium iodide, thallium-activated (Nal(Tl)) detector.
• Lead shielded counting well approximately 40 cm deep with 5-cm thick lead walls and a 7-
cm thick base and 5 cm thick top.
• National Institute of Standards and Technology (NIST) traceable aqueous solution radium-
226 absorbed onto 180 grams of activated charcoal.
• Ohaus Port-0-Gram balance with 0.1-gram sensitivity.
6.2 Sample Inspection and Documentation
Once in the laboratory, the integrity the samples was verified by visual inspection of the sample
containers. Laboratory personnel checked the containers and verified that the data sheet was
complete.
No damaged or unsealed containers were observed during inspection at the Tellco analytical
laboratory. A total of 199 samples and ten blanks for Cell 3 were ultimately verified as valid.
6.3 Background and Sample Counting
The gamma ray counting system was checked daily, including background and radium-226 source
measurements prior to and after each counting session. Based on calibration statistics, using two
sources with known radium-226 content, background and source control limits were established for
each Ludlum/Teledyne counting system with shielded well (see Appendix A).
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• The length of count time was determined by the activity of the sample being analyzed,
according to a data quality objective of a minimum of 1,000 accrued counts for any given
sample.
• The sample container was centered on the Nal detector and the shielded well door was
closed.
• The sample was counted over a determined count length and then the mid-sample count
time, date, and gross counts were documented on the radon flux measurements data sheet
and used in the calculations.
• The above steps were repeated for each exposed charcoal sample.
• Approximately 10 percent of the containers counted were selected for recounting. These
containers were recounted within a few days following the original count.
7. QUALITY CONTROL (QC) AND DATA VALIDATION
Charcoal flux measurement QC samples included the following intra-laboratory analytical :frequency
objectives:
• Blanks, 5 percent, and
• Recounts, 10 percent
All sample data were subjected to validation protocols that included assessments of sensitivity,
precision, accuracy, and completeness. As described below, all Method 115-required data quality
objectives (EPA, 2017) were attained.
7.1 Sensitivity
A total of ten blanks were analyzed by measuring the radon progeny activity in samples subjected to
all aspects of the measurement process, excepting exposure to the source region. These blank sample
measurements comprised approximately five percent of the field measurements. The results of the
blank sample radon flux rates ranged from 0.04 to 0.07 pCi/m2-s, with an average of approximately
0.06 pCi/m2-s. The lower limit of detection (LLD) was approximately 0.03 pCi/m2-s.
7.2 Precision
Twenty recount measurements, distributed throughout the sample sets, were performed by replicating
analyses of individual field samples (see Appendix B). Th€Ese recount measurements comprised
approximately 10 percent of the total number of samples analyzed. The overall precision of Cell 3
recount measurements, expressed as relative percent difference (RPD), ranged from approximately
0.0 percent to 8.8 percent with an average precision of approximately 2.6 percent RPD. This complies
with the precision objective of 10 percent.
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7.3 Accuracy
Accuracy of field measurements was assessed daily by counting two laboratory control samples with
known Ra-226 content. Accuracy of these lab control sample measurements, expressed as percent
bias, ranged from approximately -1. 7 percent to +0.6 percent. The arithmetic average bias of the lab
control sample measurements was approximately -0.7 percent (see Appendix A). This complies with
the accuracy objective of+/-10 percent bias.
7.4 Completeness
A combined total of 199 samples were verified as valid, representing 99.5 percent completeness for
Cell 3, which complies with the completeness objective of 85 percent.
8. CALCULATIONS
Radon flux rates were calculated for charcoal collection samples using calibration factors derived
from cross-calibration to sources with known total activity with identical geometry as the charcoal
containers. A yield efficiency factor was used to calculate the total activity of the sample charcoal
containers. Individual field sample result values presented were not reduced by the results of the field
blank analyses.
In practice, radon flux rates were calculated by a database computer program. The algorithms utilized
by the data base program were as follows:
Equation 8.1:
where:
pCi Rn-222/m2sec = ffs•A•b•~s<iWl.'sSj
N
Ts
b
d
A
= net sample count rate, cpm under 220-662 ke V peak
= sample duration, seconds
= instrument calibration factor, cpm per pCi; values used:
0.1698, for M-01/0-21 and
0.1701, for M-02/0-20
= decay time, elapsed hours between sample mid-time and count mid-time
= area of the canister, m2
Equation 8.2:
Gross Sample, cpm Background Sample, cpm 1-------+---------
SampleCount,t,min Background Count,t,min
Error,2cr = 2X ---------------------x Sample Concentration
Net,cpm
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Equation 8.3:
LLD• 2.71 +l4.6S)(~
[Ts*A*b*0.1 · '>)
where: 2. 71 = constant
4.65 = confidence interval factor
Sh = standard deviation of the background count rate
Ts = sample duration, seconds
b = instrument calibration factor, cpm per pCi; values used:
0.1698, forM-01/0-21 and
0.1701, for M-02/0-20
d = decay time, elapsed hours between sample mid-time and count mid-time
A = area of the canister, m2
9. RESULTS
9.1 Mean Radon Flux
Referencing 40 CFR, Part 61, Subpart W, Appendix B, Method 115 -Monitoring for Radon-222
Emissions, Subsection 2.1. 7 -Calculations, "the mean radon flux for each region of the pile and for
the total pile shall be calculated and reported as follows:
(a) The individual radon flux calculations shall be made as provided in Appendix A EPA
86(1 ). The mean radon flux for each region of the pile shall be calculated by summing all
individual flux measurements for the region and dividing by the total number of flux
measurements for the region.
(b) The mean radon flux for the total uranium mill tailings pile shall be calculated as follows:
At
Where: Js = Mean flux for the total pile (pCi/m2-s)
Ji = Mean flux measured in region i (pCi/m2-s)
A = Area ofregion i (m2)
At = Total area of the pile (m2)"
40 CFR 61, Subpart W, Appendix B, Method 115, Subsection 2.1.8, Reporting states "The results of
individual flux measurements, the approximate locations on the pile, and the inean radon flux for each
region and the mean radon flux for the total stack [pile] shall be included in the emission test report. Any
condition or unusual event that occurred during the measurements that could significantly affect the results
i;;hould be reported."
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9.2 Site Results
Site Specific Sample Results (reference Appendix C)
(a) The mean radon flux for each region within Cell 3 is as follows:
Cell 3 -Beaches Region = 71.2 pCi/m2-s (based on 29,016 m2 area)
Cell 3 -Covered Region = 11.9 pCi/m2-s (based on 257,616 m2 area)
Cell 3 -Water Region = 0.0 pCi/m2-s (based on 2,226 m2 area)
Note: Reference Appendix C of this report for the entire summary of individual measurement results.
(b) Using the data presented above, the calculated mean radon flux rate for Cell 3 is as follows:
Cell 3 = 17.8 pCi/m2-s
(7I.2X29,016)+{11.9)(257,61ili(O.OX2,226) = 17 .8
288,858
As shown above, the arithmetic mean radon flux rate for Cell 3 for the third quarter 2017 sampling
is below the NRC and EPA standard of 20 pCi/m2-s. Appendix C is a summary of individual
measurement results, including blank sample analysis.
No condition or unusual event occurred during the measurements that could significantly affect the
reported results.
Sample locations are depicted on Figure 2, which is included in Appendix D. Figure 2 was produced
byTellco.
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Figure 1
Large Area Activated Charcoal Canisters Diagram
10
1.,., Tn;r~
s~n,bb•• P,'1
\,'::z •• .r. rtt1ck
S.;.rut~I!, Pa-l
I ~2,m Tln.~c Clt--'r(U'1•
~~~ S•.•PP'-'li G•4
1tu1ain<lr
Sp1in9
" 10-,.n ~~
NCl:r>dC.ap
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Appendix A
Charcoal Canister Analyses Support Documents
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I A
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-------------------
ENERGY FUELS RESOURCES
WHITE MESA MILL, BLANDING, UTAH
2017 NESHAPs RADON FLUX MEASUREMENTS
CELL3
SAMPLING DATES: 07/16/17-07/17/17
ANALYSIS DATES: 07/18/17-07/19/17
SYSTEM COUNT Bkg Counts (1 min. each)
I.D. DATE #1 #2
M-01/D-21 7/18/2017 132 132
M-01/D-21 7/18/2017 122 131
M-01/D-21 7/19/2017 124 110
M-01/D-21 7/19/2017 120 119
M-01/D-21 7/18/2017 132 132
M-01/D-21 7/18/2017 122 131
M-01/0-21 7/19/2017 124 110
M-01/D-21 7/19/2017 120 119
M-02/0-20 7/18/2017 128 132
M-02/D-20 7/18/2017 116 154
M-02/D-20 7/19/2017 149 118
M-02/D-20 7/19/2017 119 140
M-02/D-20 7/18/2017 128 132
M-02/D-20 7/18/2017 116 154
M-02/D-20 7/19/2017 149 118
M-02/D-20 7/19/2017 119 140
#3
121
118
141
144
121
118
141
144
151
131
156
112
151
131
156
112
ACCURACY APPRAISAL TABLE
THIRD QUARTER 2017
Source Counts (1 min. each)
#1 #2 #3
10140 10270 10334
10399 10183 10170
10124 10173 9978
10132 10122 10136
9995 10172 9977
9988 10266 10189
10059 10109 9950
9954 10123 10152
10157 10112 10169
10107 10353 10074
10139 10073 9954
9969 10230 10022
10137 10199 10156
10192 10122 10338
10215 10120 10235
10289 10151 10152
AVG NET YIELD FOUND SOURCE
com com/oCi oCi ID
10120 0.1698 59598 GS-04
10127 0.1698 59641 GS-04
9967 0.1698 58697 GS-04
10002 0.1698 58907 GS-04
9920 0.1698 58420 GS-05
10024 0.1698 59034 GS-05
9914 0.1698 58388 GS-05
9949 0.1698 58590 GS-05
10009 0.1701 58842 GS-04
10044 0.1701 59050 GS-04
9914 0.1701 58285 GS-04
9950 0.1701 58495 GS-04
10027 0.1701 58948 GS-05
10084 0.1701 59281 GS-05
10049 0.1701 59077 GS-05
10074 0.1701 59222 GS-05
AVERAGE PERCENT BIAS FOR ALL ANALYTICAL SESSIONS:
KNOWN %BIAS
pCi
59300 0.5%
59300 0.6%
59300 -1.0%
59300 -0.7%
59300 -1.5%
59300 -0.4%
59300 -1.5%
59300 -1.2%
59300 -0.8%
59300 -0.4%
59300 -1.7%
59300 -1.4%
59300 -0.6%
59300 0.0%
59300 -0.4%
59300 -0.1%
-0.7%
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CHARCOAL CANISTER ANALYSIS SYSTEM
SITE LOCATION; W \,(, 4 M-Lz'\ M: \I , '"B I c,i n ch "1.j > Y. +ti h
cLmNT: E n -e.,,. ~ ~ t-==~-{. \ $ is<. Sa \.l.f' c.< s lM s fl)
Ollibration Check Log
System ID: ___ fl,\_-_o_\_._/ .... n"'--·-_2---'-I ---Calibration Date: "1 ) _ 11 / t J Due Date: ' } l 1 / L 6
Scaler S/N: ___ 5_L_S_, ___ 2 ____ High Voltage: I l \,, "3 Window: _....:4..:..:.4=.2 _ Thrsbld: ....... 2.,,...2....,0 __ _
Detector SIN: -~C2-':t.....,._l 5-.-_'3____,°3::;..._ __ Source ID/SN: ~;~ .. (,,/ut;-0 4 t Source Activity: 5q ~ lo'.~ C.i
Blank Canister Bkgd. Range, cpm: 2 cr = --'l,_O___,t,.....__ to l S"" \ 3 cr= CJ 5" to ll/2.
Gross Source Range, cpm: 2 cr= 0)~5"\ to lOL\5 E} 3 cr= qg?-t..\ to lo5"~5"
Technician: --~-=;....l._.-c._Ce-g=..x~c,.~-');rU_...:;;. . ...;;. ;;;__.;..__ I
All counts times are one minute.
Date By Back~round Counts (1 min. each) . Source Counts (1 min. each) ok?
#1 #2 #3 Av2. #1 #2 #3 Averam: YIN
1 ca n l"']l;i·Z,, t3"2-l~"Z--11.I I '2..8 1.n,LJ(l ,_r,-,_-,n i ('.)"7,, ~ 4 lDZ4B 'i
i"7 t.a I Jl'j ,I;'.;i ~ l '"2.. ""l,. ,~ \ tt'i?> \"2-if I n-:a,. (/)0\ ·~· ~...,_ I ,rn -,I\ l 07-.5" I y
/j ~ l "'7 ]7]L_ I "l.4 JJO 14, \ -z.. c:;-IO l 'l...', t"' -J-:,, Qq"i~ l vo:,·-i, '/
7, ,q I J'1 h2L 1"2.k'{ I 10\ uJ't ,~ l Ot """'>-Z-,.-,,21,, IOt~i ... t0130 -.!/ r
YIN: Y = average background and source cpm falls within the control limits.
N = average background and source cpm does not fall within the control limits.
The acceptable ranges were determined from prior background and source check data.
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tv~~
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CHARCOAL CANISTER ANALYSIS SYSTEM
srraLOCATioN, "'-!~\~ M~'>F\ M~I~ :'"~11 ~h
™' E-.fDjJ Ml,,e.\s R-L ::ro~ 4:S
Caboxation Check Loa
System ID: __,,;,,.;M __ -_O_l_/_)J......_·-_2.----a;\ __ Calibration Date: "1 / t, / 1 7 Due Date: 1 J 1-, / 1 8
Scaler S/N: __ __.5 ___ \ __ 5_1-'"-"1-____ High Voltage: \ l (,', Window: 4.42 Thrshld: 2.20
Detector SIN: _O'"""'-'::\_t .... 5...L-..3"-2-"'----Source ID/SN: 1R,q"'l.U LG:5-oS I' Source Activity: So>.3 -" p b l
Blank Canister Bkgd. Range, cpm: 2 cr = ,o(,, to tS:l 3 cr= CJ~ to lv,'2
Gross Source Range, cpm: 2 cr = ~O)L..\ 0 to 10435 3 cr= O)S2]
Technician: :p £... Oe:Q-.__ r
All counts times are one minute.
Date By Background Counts (1 min. each) Source Counts 71 min each)
#1 #2 #3 Av2. #1 #2 #3
,JtBj li ,~ V. { ;r2 .... \ ","2-\ "2-1 1-i.-t, 0,~<" l0111-~~-,-,
"1h0 ,,, v. ~ t "1-"7.,., \°?I l \ F3 l 'l>T U\O\~~ .,,.., , .. (,, IC,\ ~O)
"1' / lq I,, t,; '1_ \"'.J...4-110 I '-l \ \ "2-ei t (li--)1.,'0\ lrnoO\ qQJc:;D
-, I Io /n l>U.. \ 7,.0 \IQ lttY \1--B qq r:;-L.f 1 c,,..,_:-;, 1(')\~
YIN: Y = average background and source cpm falls within the control limits.
N = average background and source cpm does not fall within the control limits.
The acceptable ranges were determined from prior background and source check data.
to tcss-i
ok?
Average YIN
f~'O y
1014-5 'I
(0030J "' /007<.t, ....JI
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it~-1-
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CHARCOAL CANISTER ANALYSIS SYSTEM
SITE LOCATION: 'vJ~~~ M1.'A M~\\.~ f!V\,J ~ ~l Y. bk.
CLIENT: bl:t.:ir~t Fu.~ I :> R :e.So,A.V::U s ( u SA)
Qm1,ratioa Check 1Qg
System ID: -""_ .... _0_1_/_:o ___ -_2._o___ Calibration Date: t / ,., / n __ Due Date: I/ f. 7 / 1'8
Scaler SIN: ____ S ___ l_S_{-_3 ____ High Voltage: 8 f3 9 Window: 4.42 Thrshld: 2.20
Detector SIN: _D_L\..,._l....;~;;..,_L--____ Source ID/SN: ~o?:i.~5-01:l Source Activity: 53-3K.pC:
Blank Canister Bkgd. Range, cpm.: 2 er= LlO to lSJ 3cr= 98 to l(p8
Gross Source Range, cpm: 2 er= 9952. to IOY,SB 3cr= qs\~ to lOL."2"2..
Technician: );n_~ )i,tc
All counts times are one minute.
Date By Backeround Counts (1 min. each) Source Counts (1 min. each ok?
#1 #2 #3 Avg,. #1 #2 #3 Average YIN
7ll0 J t'J P2/_ 1·2..~ \~'2. r::, r I~/ iotS'1 10\\ "'2-lO I CP"'J 10144? 'I
111 t!JI l7 P.il. I I lA I ~Lf \ :, , \ -:s 4 t0h~7 l n::r..:;"'::lt ltl'\OrU t O ,., P\ " "11 PJ 1,-, 'bl./_ 1 Lf,q \ I B IS(p ,~, l()L 'ZO\ ion,~ ~Q)C::W l00SS l...J
..; Jjo{J 11 ! "'r;;;:IU l t 17\ 140 \ 1 "l-lL.-t+ qO)C,') tD--1.":z.t""J 11)0~"'1 t007q " . . r
YIN: Y = average background and source cpm falls within the control limits.
N = average background and source cpm does not fall within the control limits.
The acceptable ranges were determined from prior background and source check data.
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()Y'G-1 tb~t
\>re.
~o~t-
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CHARCOAL CANISTER ANALYSIS SYSTEM
SITELOCATIO~ \JJ k>kM~~ M; \\ ,Bl~~ d\ Vlj) Y. +I\"'
CLIENT: t:V\~i/'~J fu-t\s ~t-$Ou.(U'(. ( u..SA)
Calibration Check Lo&
System ID: -~_.;;....-_0_"2.._...,../_1) ___ -_2_0__ Calibration Date: 1 / L 1 J t J Due Date: '1 / 11 / L 13 I
Scaler SIN: __ _..S'-.......\_S......,l, ....... 3..._ __ High Voltage: 9B8 Window: 4.42 Thrshld: 2.20
Detector SIN: _0 .... -\_._L_S°..__3 __ '2-____ Source ID/SN: %,o."2~/~S ~~ource Activity: sq.7, Kp (..;
Blank Canister Bkgd Range, cpm: 2 a = \LO to l5':J 3cr= '16 to 1"'8
Gross Source Range, cpm: 2 a= OJ0,1 I to 10'-\ <,Q 3 a= q E,L{ 0, to { 05"6 "2..
Technician: J;?Z: ~ }.¢.e.
All cowus times an, one minute
Date By Bacmound Counts (1 min. each) Source Counts (1 min. each> ok?
#1 #2 #3 Avg, #1 #2 #3 AveraQ'e YIN
1. Ul/11 ~u \2~ ,~-i I Sl t '"3"'":' ro \."2,., in,O\ 0\ ,.,.,,c~ 10 f ld.l V
17 j 1GJ1, D'-k tlt .. tc:::L l ?,\ ,~., 1n10\'?_ I n1 -z.. 1-10"2."':Z.tl f/') '21, " -, I IOJ l"7 .~ I'-~ti') ,-u: I S-l. 14 lttz.... \.c:; IOl 7-0 t.0"2..~C 1010)() ..:.,
7, 1gJ n J~L4 l 1" l '-40 \l~ 12c. lt::>t .. ~O"\ \OtS J ,,., (~"2-1n,~, I..J ,
YIN: Y = average background and source cpm falls within the control limits.
N = average background and source cpm does not fall within the control limits.
The acceptable ranges were determined from prior background and source check data.
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BALANCE OPERATION DAILY CHECK
Balance Model: 0 h.~ IA s ? 0 rt-'j),. ~ VP! W\ $ N : / '2. "307
Standard Weight (g}: __ :,_o_o_,.0___,~rJ----------
Date Pre-check (g} Post-check (g} O.K. :t: 0.1 o/o? By
7/,e/,, 3oO .. o ·2-o;c,.°.) '/~ ~~.;;
,J,oiJ,-, f )ry-;{_ ·300.0 300.0 v~s --' f ,
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AppendixB
Recount Data Analyses
B
-------------------CLIENT: ENERGY FUELS RESOURCES PROJECT: RADON FLUX MEASUREMENTS, WHITE MESA MILL PROJECT NO.: 17004.03
PILE: 3 BATCH: G SURFACE: SOIL AIR TEMP MIN: 59°F WEATHER: RAINED 0.10 inches AFTER PLACEMENT
AREA: BEACH DEPLOYED: 7 16 17 RETRIEVED: 7 17 17 CHARCOAL BKG: 144 cpm Wt. Out: 180.0 g.
FIELD TECHNICIANS: CE,DLC, CS, TE, MC COUNTED BY: DLC DATA ENTRY BY: DLC TARE WEIGHT: 29.2 g.
COUNTING SYSTEM I.D.: M01/D21, M02/D20 CAL. DUE: 7/17/18
RECOUNT CANISTER ANALYSIS:
GFID 82\J•lPI:E REtrRI'-.i ANALYSIS !~!D-TI?,1E C:tJ'l" GROSS GROSS ± LLD PRECISION
LOCATION I. D. HR MIN HR MIN MO DA YR HR MIN {MIN} COUNTS WT IN pCi/m' s pCi/m 2 s /m 2 S % RPD
GlO GlO 7 24 7 21 7 18 17 13 1 1 20994 219.3 37.1 3.7 0.03
RECOUNT GlO 7 24 7 21 7 19 17 12 13 1 17253 219.3 36.3 3.6 0.04 2.2%
G20 G20 7 34 7 26 7 18 17 13 8 1 25914 228.3 46.0 4.6 0.03
RECOUNT G20 7 34 7 26 7 19 17 12 13 1 21427 228.3 45.2 4.5 0.04 1.8%
G30 G30 7 19 7 19 7 18 17 13 16 1 75523 234;1 134.2 13.4 0.03
RECOUNT G30 7 19 7 19 7 19 17 12 15 1 63382 234.1 133.9 13.4 0.04 0.2%
G40 G40 7 29 7 24 7 18 17 13 23 1 63252 229.2 112.7 11.3 0.03
RECOUNT G40 7 29 7 24 7 19 17 12 15 1 52396 229.2 110.9 11.1 0.04 1.6%
G50 G50 7 39 7 29 7 18 17 13 31 1 29194 230.3 52.1 5.2 0.03
RECOUNT G50 7 39 7 29 7 19 17 12 22 1 24284 230.3 51.4 5.1 0.04 1.4%
G60 G60 7 24 7 21 7 18 17 13 38 1 9289 230.8 16.4 1.6 0.03
RECOUNT G60 7 24 7 21 7 19 17 12 22 1 7974 230.8 16.6 1. 7 0.04 1.2%
G70 G70 7 34 7 26 7 18 17 13 46 1 4·0942 232.1 73.2 7.3 0.03
RECOUNT G70 7 34 7 26 7 19 17 12 24 1 33877 232.1 71.8 7.2 0.04 1.9%
G80 G80 7 19 7 19 7 18 17 13 53 1 8000 228.7 14.1 1.4 0.03
RECOUNT G80 7 19 7 19 7 19 17 12 24 1 6304 228.7 13 .1 1.3 0 .. 04 7.4%
G90 G90 7 29 7 24 7 18 17 14 1 1 81336 228.7 145.7 14.6 0.03
RECOUNT G90 7 29 7 24 7 19 17 12 26 1 66228 228.7 140.5 14.1 0.04 3.6%
GlOO GlOO 7 39 7 29 7 18 17 14 8 1 31852 236.4 57.1 5.7 0.03
RECOUNT GlOO 7 39 7 29 7 19 17 12 26 1 26515 236.4 56.2 5.6 0.04 1.6%
AVERAGE PERCENT PRECISION FOR THE CELL 3 BEACH REGION: 2.3%
Page 1 of 1
-------------------CLIENT: ENERGY FUELS RESOURCES PROJECT: RADON FLUX MEASUREMENTS, WHITE MESA MILL PROJECT NO.: 17004.03
PILE: 3 BATCH: H SURFACE: SOIL AIR TEMP MIN: 59°F WEATHER: CLEAR, RAINED 0.10 inches AFTER PLACEMENT
AREA: COVER DEPLOYED: 7 16 17 RETRIEVED: 7 17 17 CHARCOAL 8KG: 145 cpm Wt. Out: 180.0 g.
FIELD TECHNICIANS: CE,DLC, CS, TE, MC COUNTED BY: DLC DATA ENTRY BY: DLC TARE WEIGHT: 29.2 g.
COUNTING SYSTEM I.D.: M01/D21, M02/D20 CAL. DUE: 7/17/18
RECOUNT CANISTER ANALYSIS:
GRID SAMPLE RETRIV ANA!..YS:r.s MID-TIME GROSS RADON ± LLD PREC!SION
LOCATION I• D, HR MIN HR MIN MO DA YR HR MIN (MIN} COUNTS WT IN pCi/m~ $ pci/m 2 S pCi/m' S % RPD
HlO HlO 8 7 7 46 7 18 17 18 24 1 2779 224.6 4.9 0.5 0.03
RECOUNT HlO 8 7 7 46 7 19 17 14 4 1 2396 224.6 4.9 0.5 0.04 0.9%
H20 H20 7 57 7 47 7 18 17 18 39 1 3597 229.2 6.4 0.6 0.03
RECOUNT H20 7 57 7 47 7 19 17 14 4 1 3218 229.2 6.6 0.7 0.04 3.0%
H30 H30 8 17 7 49 7 18 17 18 52 2 1159 231. 0 0.8 0.1 0.03
RECOUNT H30 8 17 7 49 7 19 17 18 6 2 1014 231.0 0.8 0.1 0.04 0.7%
H40 H40 8 10 7 50 7 18 17 19 6 2 1730 225.8 1.4 0.1 0.03
RECOUNT H40 8 10 7 50 7 19 17 14 6 2 1556 225.8 1.4 0.1 0.04 1.5%
H50 H50 7 54 8 2 7 18 17 19 17 1 1005 235.1 1.6 0.2 0.03
RECOUNT H50 7 54 8 2 7 19 17 14 9 2 1661 235.1 1. 5 0.1 0.04 8.4%
H60 H60 7 53 8 2 7 18 17 19 27 1 1266 227.7 2.1 0.2 0.03
RECOUNT H60 7 53 8 2 7 19 17 14 9 1 1208 227.7 2.3 0.2 0.04 8.8%
H70 H70 8 8 8 7 7 18 17 19 35 1 2637 231.7 4.6 0.5 0.03
RECOUNT H70 8 8 8 7 7 19 17 14 11 1 2398 231. 7 4.8 0.5 0.04 4 ._0%
HBO HBO 8 6 8 7 7 18 17 19 42 1 19170 233.4 35.3 3.5 0.03
RECOUNT HBO 8 6 8 7 7 19 17 14 11 1 16643 233.4 35.2 3.5 0.04 0.3%
H90 H90 8 20 8 12 7 18 17 19 50 1 1001 228.1 1.6 0.2 0.03
RECOUNT H90 8 20 8 12 7 19 17 14 14 2 1755 228.l 1.6 0.2 0.04 1. 7%
HlOO HlOO 8 31 8 17 7 18 17 19 57 l 46675 227.5 87.3 8.7 0.03
RECOUNT HlOO 8 31 8 17 7 19 17 14 13 1 40687 227.5 87.3 8.7 0.04 0.0%
AVERAGE PERCENT PRECISION FOR THE CELL 3 COVER REGION: 2.9%
Pagel of 1
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Appendix C
Radon Flux Sample Laboratory Data (including Blanks)
C
-------------------CLIENT: ENERGY FUELS RESOURCES PROJECT: RADON FLUX MEASUREMENTS, WHITE MESA MILL PROJECT NO.: 17004.03
PILE: 3 BATCH: G SURFACE: SOIL AIR TEMP MIN: 59°F WEATHER: RAINED 0.10 inches AFTER PLACEMENT
AREA: BEACH DEPLOYED: 7 16 17 RETRIEVED: 7 17 17 CHARCOAL BKG: 144 cpm Wt. Out: 180.0 g.
FIELD TECHNICIANS: CE,DLC, CS, TE, MC COUNTED BY: DLC DATA ENTRY BY: DLC TARE WEIGHT: 29.2 g.
COUNTING SYSTEM I.D.: M01/D21, M02/D20 CAL. DUE: 7/17/18
G-Rif: SA11!PLE: DEl?L0Y RETRIV AN}i:I./'iSIS Z•fIJJ-JI'It·!E CNT f}ROSS Rl~lJON ± LLD
LOCATION I• D, HR .MIN HR MIN MO DA YR HR MIN {MIN} COUNTS WT IN /m2 S pCi/m 2 $ pCi/m 2 $ COMMENTS l
GOl GOl 7 15 7 17 7 18 17 12 55 1 33734 229.1 59.5 6.0 0.03
G02 G02 7 16 7 17 7 18 17 12 55 1 112627 224.5 199.2 19.9 0.03
G03 G03 7 17 7 18 7 18 17 12 56 1 28016 231.4 49.4 4.9 0.03
G04 G04 7 18 7 18 7 18 17 12 56 1 8318 229.6 14.5 1.4 0.03
GOS GOS 7 19 7 19 7 18 17 12 58 1 5378 235.4 9.3 0.9 0.03
G06 G06 7 20 7 19 7 18 17 12 58 1 11949 242.3 20.9 2.1 0.03
G07 G07 7 21 7 20 7 18 17 12 59 1 4080 235.0 7.0 0,7 0.03
GOB GOB 7 22 7 20 7 18 17 12 59 1 11166 231.2 19.6 2.0 0.03
G09 G09 7 23 7 21 7 18 17 13 1 1 16169 229.9 28.5 2.8 0.03
GlO GlO 7 24 7 21 7 18 17 13 1 1 20994 219.3 37.0 3.7 0.03
Gll Gll 7 25 7 22 7 18 17 13 2 1 7877 227.1 13.8 1.4 0.03
Gl2 Gl2 7 26 7 22 7 18 17 13 2 1 93484 213.9 165.8 16.6 0.03
Gl3 Gl3 7 27 7 23 7 18 17 13 4 1 10996 224.9 19.3 1.9 0.03
Gl4 Gl4 7 28 7 23 7 18 17 13 4 1 28435 235.1 50.3 5.0 0.03
G15 GlS 7 29 7 24 7 18 17 13 5 1 59317 237.0 105.4 10.5 0.03
G16 G16 7 30 7 24 7 18 17 13 5 l 31223 226.8 55.3 5.5 0.03
G17 Gl7 7 31 7 25 7 18 17 13 7 1 95035 227.5 169.1 16.9 0.03
G18 G18 7 32 7 25 7 18 17 13 7 1 64855 224.7 115.2 11.5 0.03
G19 G19 7 33 7 26 7 18 17 13 8 1 76401 224.4 136.0 13 .6 0.03
G20 G20 7 34 7 26 7 18 17 13 8 1 25914 228.3 45.9 4.6 0.03
G21 G21 7 35 7 27 7 18 17 13 10 1 76499 226.9 136.3 13.6 0.03
G22 G22 7 36 7 27 7 18 17 13 10 1 71225 229.1 126.7 12.7 0.03
G23 G23 7 37 7 28 7 18 17 13 11 1 92498 226.7 165.0 16.5 0.03
G24 G24 7 38 7 28 7 18 17 13 11 1 105099 227.7 187.3 18.7 0.03
G25 G25 7 39 7 29 7 18 17 13 13 1 88949 224;3 158.7 15.9 0.03
G26 G26 7 15 7 17 7 18 17 13 13 1 18113 230.3 31. 9 3.2 0.03
G27 G27 7 16 7 17 7 18 17 13 14 1 20837 230.0 36.8 3.7 0.03
G28 G28 7 17 7 18 7 18 17 13 14 1 30348 228.5 53.6 5.4 0.03
G29 G29 7 18 7 18 7 18 17 13 16 1 74912 226.0 133.0 13.3 0.03
G30 G30 7 19 7 19 7 l8 17 13 16 1 75523 234.1 133.9 13.4 0.03
G31 G31 7 20 7 19 7 18 17 13 17 1 47207 225.9 83.8 8.4 0.03
G32 G32 7 21 7 20 7 18 17 13 17 1 66635 225.4 118.2 11.8 0.03
G33 G33 7 22 7 20 7 18 17 13 19 l 4664 229.8 8.1 0.8 0.03
G34 G34 7 23 7 21 7 ].8 17 13 19 1 15267 229.5 26.9 2.7 0.03
G35 G35 7 24 7 21 7 l8 l7 13 20 1 61948 227.9 ll0.2 11.0 0.03
G36 G36 7 25 7 22 7 18 l7 13 20 1 26880 230.1 47.6 4.8 0.03
G37 G37 7 26 7 22 7 18 17 13 22 1 39074 229.7 69.5 6.9 0.03
Page 1 of 3
- - - - - - - - - - - - --·--- - -CLIENT: ENERGY FUELS RESOURCES PROJECT: RADON FLUX MEASUREMENTS, WHITE MESA MILL PROJECT NO.: 17004.03
PILE: 3 BATCH: G SURFACE: SOIL AIR TEMP MIN: 59°F WEATHER: RAINED 0.10 inches AFTER PLACEMENT
AREA: BEACH DEPLOYED: 7 16 17 RETRIEVED: 7 17 17 CHARCOAL 8KG: 144 cpm Wt. Out: 180.0 g.
FIELD TECHNICIANS: CE,DLC, CS, TE, MC COUNTED BY: DLC DATA ENTRY BY: DLC TARE WEIGHT: 29.2 g.
COUNTING SYSTEM 1.0.: M01/D21, M02/D20 CAL. DUE: 7/17/18
GRIP SAMPLE DEPLOY P.ETRIV .Z\.NALYSH: MID· TIME C'NT GROSS GROSS R1\DON ± LLD
LOCATION I. D, HR MIN HR MIN MO DA YR HR MIN (MIN) COUNTS WT IN pCi/m 2 S /m2 S /m' 9 COMMENTS:
G38 G38 7 27 7 23 7 18 17 13 22 1 42275 220.0 75.0 7.5 0.03
G39 G39 7 28 7 23 7 18 17 13 23 1 39157 231. 0 6~.7 7.0 0.03
G40 G40 7 29 7 24 7 18 17 13 23 1 63252 229.2 112.5 11.2 0.03
G41 G41 7 30 7 24 7 18 17 13 25 1 8242 222.9 14.5 1.4 0.03
G42 G42 7 31 7 25 7 18 17 13 25 1 2882 224.7 4.9 0.5 0.03
G43 G43 7 32 7 25 7 18 17 13 26 1 20614 224.9 36.6 3.7 0.03
G44 G44 7 33 7 26 7 18 17 13 26 1 41010 240.0 72.9 7.3 0.03
G4S G4S 7 34 7 26 7 18 17 13 28 1 7140 229.7 12.5 1.3 0.03
G46 G46 7 35 7 27 7 18 17 13 28 1 17775 225.6 31.5 3.1 0.03
G47 G47 7 36 7 27 7 18 17 13 29 1 29690 230.2 52.9 5.3 0.03
G4S G4S 7 37 7 28 7 18 17 13 29 1 35014 227.2 62.3 6.2 0.03
G49 G49 7 38 7 28 7 18 17 13 31 1 36537 232.5 65.2 6.5 0.03
G50 G50 7 39 7 29 7 18 17 13 31 1 29194 230.3 52.0 5.2 0.03
GSl G51 7 15 7 17 7 18 17 13 32 1 65959 224.0 117 .2 11. 7 0.03
G52 G52 7 16 7 17 7 18 17 13 32 1 44194 227.2 78.4 7.8 0.03
G53 G53 7 17 7 18 7 18 17 13 34 1 6815 228.2 11.9 1.2 0.03
G54 GS4 7 18 7 18 7 18 17 13 34 1 9176 229.7 16.1 1.6 0.03
GSS G55 7 19 7 19 7 18 17 13 35 1 39485 230.1 70.2 7.0 0.03
G56 GS6 7 20 7 19 7 18 17 13 35 1 32026 228.2 56.8 5.7 0.03
G57 G57 7 21 7 20 7 18 17 13 37 1 12490 223.5 22.0 2.2 0.03
G58 G58 7 22 7 20 7 18 17 13 37 1 21834 223.2 38.7 3.9 0.03
G59 G59 7 23 7 21 7 18 17 13 38 1 41850 224.1 74.5 7.4 0.03
G60 G60 7 24 7 21 7 18 17 13 38 1 9289 230.8 16.3 1.6 0.03
G61 G61 7 25 7 22 7 18 17 13 40 1 8879 222.6 15.6 1. 6 0.03
G62 G62 7 26 7 22 7 18 17 13 40 1 44145 229.6 78.5 7.9 0.03
G63 G63 7 27 7 23 7 18 17 13 41 1 15726 231.5 27.9 2.8 0.03
G64 G64 7 28 7 23 7 18 17 13 41 1 37707 221.7 67.1 6.7 0.03
G65 G65 7 29 7 24 7 18 17 13 43 1 22982 229.5 40.9 4.1 0.03
G66 G66 7 30 7 24 7 18 17 13 43 1 59383 228.0 105.9 10.6 0.03
G67 G67 7 31 7 25 7 18 17 13 44 1 9181 223.1 16.2 1.6 0.03
G68 G68 7 32 7 25 7 18 17 13 44 1 52566 229.2 93.8 9.4 0.03
G69 G69 7 33 7 26 7 18 17 13 46 1 56579 230.3 101.1 10.1 0.03
G70 G70 7 34 7 26 7 18 17 13 46 1 40942 232.1 73 .o 7.3 0.03
G71 G71 7 35 7 27 7 18 17 13 47 1 14454 224.2 25.7 2.6 0.03
G72 G72 7 36 7 27 7 18 17 13 47 1 33189 221.7 59.2 5.9 0.03
G73 G73 7 37 7 28 7 18 17 13 49 1 4514 58.6 LOW WEIGHT -VOID SAMPLE SPILLED.
G74 G74 7 38 7 28 7 18 17 13 49 1 19547 224.9 34.8 3.5 0.03
Page 2 of 3
-------------------CLIENT: ENERGY FUELS RESOURCES PROJECT: RADON FLUX MEASUREMENTS, WHITE MESA MILL PROJECT NO.: 17004.03
PILE: 3 BATCH: G SURFACE: SOIL AIR TEMP MIN: 59°F WEATHER: RAINED 0.10 inches AFTER PLACEMENT
AREA: BEACH DEPLOYED: 7 16 17 RETRIEVED: 7 17 17 CHARCOAL BKG: 144 cpm Wt. Out: 180.0 g.
FIELD TECHNICIANS: CE,DLC, CS, TE, MC COUNTED BY: DLC DATA ENTRY BY: DLC TARE WEIGHT: 29.2 g.
COUNTING SYSTEM I.D.: M01/D21, M02/D20 CAL. DUE: 7/17/18
GP.fr: SAMFLE DgPLOY RETRIV ANAt'iSIS MID-TIME CNT GROSS GROSS RAiJON ± LLD
LOCATION I. D. HR MIN HR MIN MO DA YR HR MIN (MIN) COUNTS WT IN pCi/m' s pC-i/1n2 s pCi/m 2 s COMMENTS:
G75 G75 7 39 7 29 7 18 17 13 50 1 11194 232.5 19.8 2.0 0.03
G76 G76 7 15 7 17 7 18 17 13 50 1 18432 226.3 32.6 3.3 0.03
G77 G77 7 16 7 17 7 18 17 13 52 1 87397 233.3 155.9 15.6 0.03
G78 G78 7 17 7 18 7 18 17 13 52 1 58096 232.8 103.3 10.3 0.03
G79 G79 7 18 7 18 7 18 17 13 53 1 39391 227.8 70.2 7.0 0.03
G80 G80 7 19 7 19 7 18 17 13 53 1 8000 228.7 14.0 1.4 0.03
G81 G81 7 20 7 19 7 18 17 13 55 1 30753 221.3 54.8 5.5 0.03
G82 G82 7 21 7 20 7 18 17 13 55 1 8088 233.2 14.2 1.4 0.03
G83 G83 7 22 7 20 7 18 17 13 56 1 3610 232.3 6.2 0.6 0.03
G84 G84 7 23 7 21 7 18 17 13 56 1 21918 227.3 38.9 3.9 0.03
G85 G85 7 24 7 21 7 18 17 13 58 1 33066 231.9 59.0 5.9 0.03
G86 G86 7 25 7 22 7 18 17 13 58 1 161998 227.5 289.4 28.9 0.03
G87 G87 7 26 7 22 7 18 17 13 59 1 47443 231.1 84.8 8.5 0.03
G88 G88 7 27 7 23 7 18 17 13 59 1 88080 227.7 157.3 15.7 0.03
G89 G89 7 28 7 23 7 18 17 14 1 1 92346 226.2 165.4 16.5 0.03
G90 G90 7 29 7 24 7 18 17 14 1 l 81336 228.7 145.4 14.5 0.03
G91 G91 7 30 7 24 7 18 17 14 2 1 101302 208.7 181.6 18.2 0.03
G92 G92 7 31 7 25 7 18 17 14 2 1 72437 230.2 129.5 13.0 0.03
G93 G93 7 32 7 25 7 18 17 14 4 1 12805 229.6 22.7 2.3 0.03
G94 G94 7 33 7 26 7 18 17 14 4 1 6703 233.9 11. 8 1.2 0.03
G95 G95 7 34 7 26 7 18 17 14 5 1 8062 232.7 14.2 1.4 0.03
G96 G96 ·7 35 7 27 7 18 17 14 5 1 13925 226.1 24.7 2.5 0.03
G97 G97 7 36 7 27 7 18 17 14 7 1 59645 237.8 107.0 10.7 0.03
G98 G98 7 37 7 28 7 18 17 14 7 1 112037 229.3 200.9 20.1 0.03
G99 G99 7 38 7 28 7 18 17 14 8 1 58772 227.9 105.5 10.6 0.03
GlOO GlOO 7 39 7 29 7 18 17 14 8 1 31852 236.4 57.0 5.7 0.03
AVERAGE RADON FLUX RATE FOR THE CELL 3 BEACH REGION: 71.2
BLANK CANISTER ANALYSIS: 289.4 MAX
GRID SAMPLE RETRIV .i'tNALYSIS HID-TIME'. CNT RADON ± LLD
LOChTl\)N I. D. HR HIN HR MIN MO DA YR HR MIN {MIN) COUNTS WT IN pCi/:m· s 's /m'" s C:ONNENTS;
G BLANK 1 G BLANK 1 6 45 6 50 7 18 17 11 53 10 1758 210.0 0.06 0.02 0.03 CONTROL
G BLANK 2 G BLANK 2 6 45 6 50 7 18 17 11 53 10 1729 210.1 0.05 0.02 0.03 CONTROL
G BLANK 3 G BLANK 3 6 45 6 50 7 18 17 11 4 10 1769 210.9 0.06 0.02 0.03 CONTROL
G BLANK 4 G BLANK 4 6 45 6 50 7 18 17 11 4 10 1692 210.8 0.04 0.02 0.03 CONTROL
G BLANK 5 G BLANK 5 6 45 6 50 7 18 17 11 26 10 1701 209.0 0.05 0.02 0.03 CONTROL
AVERAGE BLANK CANISTER ANALYSIS FOR THE CELL 3 BEACH REGION: 0.05 pCi/m 2 s
Page 3 of 3
-------------------CLIENT: ENERGY FUELS RESOURCES PROJECT: RADON FLUX MEASUREMENTS, WHITE MESA MILL PROJECT NO.: 17004.03
PILE: 3 BATCH: H SURFACE: SOIL AIR TEMP MIN: 59°F WEATHER: CLEAR, RAINED 0.10 inches AFTER PLACEMENT
AREA: COVER DEPLOYED: 7 16 17 RETRIEVED: 7 17 17 CHARCOAL BKG: 145 cpm Wt. Out: 180.0 g.
FIELD TECHNICIANS: CE,DLC, CS, TE, MC COUNTED BY: DLC DATA ENTRY BY: DLC TARE WEIGHT: 29.2 g.
COUNTING SYSTEM 1.D.: M01/D21, M02/D20 CAL. DUE: 7/17/18
GRID SAMPLE DEPLOY RETRIV .l'.l,NALYSIS I-HD-TIME CNT GR0~1S RADON ± LLD
LOCATION I. D. HR MIN HR t'1!N MO DA YR HR MIN (MINJ COUNTS WT IN /111• s pCi/m 2 s pCi/mz s COMMENTS:
HOl HOl 7 45 7 45 7 18 17 18 8 1 3890 227.1 6.9 0.7 0.03
H02 H02 7 47 7 45 7 18 17 18 8 1 1379 231.2 2.3 0.2 0.03
H03 H03 7 50 7 46 7 18 17 18 12 2 1000 234.7 0.7 0.1 0.03
H04 H04 7 52 7 46 7 18 17 18 13 5 1016 230.6 0.1 0.0 0.03
HOS HOS 7 55 7 47 7 18 17 18 17 2 1237 234.2 0.9 0.1 0.03
H06 H06 7 57 7 47 7 18 17 18 18 3 1254 234.1 o.s 0.1 0.03
H07 H07 8 0 7 48 7 18 17 18 21 3 1456 234.6 0.6 0.1 0.03
HOS HOS 8 2 7 45 7 18 17 18 21 3 1235 228.4 0.5 0.0 0.03
H09 H09 8 5 7 45 7 18 17 18 24 2 1004 228.0 0.7 0.1 0.03
HlO HlO 8 7 7 46 7 18 17 18 24 1 2779 224.6 4.9 0.5 0.03
Hll Hll 8 10 7 46 7 18 17 18 27 2 1147 230.6 0.8 0.1 0.03
H12 Hl2 8 12 7 47 7 18 17 18 27 2 1001 233.6 0.7 0.1 0.03
H13 Hl3 8 15 7 47 7 18 17 18 30 2 1678 231. 7 1.3 0.1 0.03
H14 H14 8 17 7 48 7 18 17 18 30 1 2856 230.9 5.1 0.5 0.03
HlS HlS 7 45 7 45 7 18 17 18 33 2 1133 232.1 0.8 0.1 0.03
Hl6 Hl6 7 47 7 45 7 18 17 18 33 3 1381 232.2 0.6 0.1 0.03
H17 Hl7 7 50 7 46 7 18 17 18 36 3 1249 229.3 0.5 0.1 0.03
H18 H18 7 52 7 46 7 18 17 18 36 3 1497 232.5 0.7 0.1 0.03
H19 Hl9 7 55 7 47 7 18 17 18 39 2 1333 228.5 1.0 0.1 0.03
H20 H20 7 57 7 47 7 18 17 18 39 1 3597 229.2 6.4 0.6 0.03
H21 H21 8 0 7 48 7 18 17 18 42 2 1634 228.2 1.3 0.1 0.03
H22 H22 8 0 7 45 7 18 17 18 42 1 5492 225.1 10.0 1.0 0.03
H23 H23 7 57 7 45 7 18 17 18 44 1 1791 233.6 3.1 0.3 0.03
H24 H24 7 55 7 46 7 18 17 18 44 1 2208 229.9 3.8 0.4 0.03
H25 H25 7 52 7 46 7 18 17 18 46 2 1045 227.2 0.7 0.1 0.03
H26 H26 7 50 7 47 7 18 17 18 46 2 1312 227.6 0.9 0.1 0.03
H27 H27 7 47 7 47 7 18 17 18 48 1 1613 225.7 2.7 0.3 0.03
H28 H28 7 45 7 · 48 7 18 17 18 49 2 1361 233.7 1.0 0.1 0.03
H29 H29 8 20 7 49 7 18 17 18 52 3 1257 221.6 0.5 0.1 0.03
H30 H30 8 17 7 49 7 18 17 18 52 2 1159 231. 0 0.8 0.1 0.03
H31 H31 8 15 7 50 7 18 17 18 56 3 1107 227.3 0.4 0.0 0.03
H32 H32 8 12 7 50 7 18 17 18 56 2 1210 231.2 0.9 0.1 0.03
H33 H33 8 10 7 49 7 18 17 18 59 l 3101 224.3 5.5 0.6 0.03
H34 H34 8 7 7 49 7 18 17 18 59 1 2523 226.3 4.4 0.4 0.03
H35 H35 8 5 7 so 7 18 17 19 0 1 5555 227.0 10.1 1. 0 0.03
H36 H36 8 2 7 50 7 18 17 19 0 1 1003 229.8 1.6 0.2 0.03
H37 H37 8 2 7 49 7 18 17 19 3 3 1249 228.1 0.5 0.1 0.03
Page 1 of 3
-------------------CLIENT: ENERGY FUELS RESOURCES PROJECT: RADON FLUX MEASUREMENTS, WHITE MESA MILL PROJECT NO.: 17004.03
PILE: 3 BATCH: H SURFACE: SOIL AIR TEMP MIN: 59°F WEATHER: CLEAR, RAINED 0.10 inches AFTER PLACEMENT
AREA: COVER DEPLOYED: 7 16 17 RETRIEVED: 7 17 17 CHARCOAL 8KG: 145 cpm Wt. Out: 180.0 g.
FIELD TECHNICIANS: CE,DLC, CS, TE, MC COUNTED BY: DLC DATA ENTRY BY: DLC TARE WEIGHT: 29.2 g.
COUNTING SYSTEM 1.D.: M01/D21, M02/D20 CAL. DUE: 7/17/18
GR1T SAMPijE DEPLOY RE'TlUV ANALYSIS HlD~TIHE CNT GROSS GROSS RADON ± LLD
LOCATION I. D. HR MIN' HR MIN MO DA YR HR MIN (HIN} COUNTS WT IN pCi/m 2 $ pCi/m 2 $ /1X!,2 $ COMMENTS:
H38 H38 8 5 7 49 7 18 17 19 3 2 1088 223.6 0.7 0.1 0.03
H39 H39 8 7 7 50 7 18 17 19 6 2 1117 231.1 0.8 0.1 0.03
H40 H40 8 10 7 50 7 18 17 19 6 2 1730 225.8 1.3 0.1 0.03
H41 H41 8 12 7 49 7 18 17 19 9 3 1247 220.5 0.5 0.1 0.03
H42 H42 8 15 7 49 7 18 17 19 9 3 1400 225.4 0.6 0.1 0.03
H43 H43 8 17 7 50 7 18 17 19 12 2 1134 231.8 0.8 0.1 0.03
H44 H44 8 20 7 50 7 18 17 19 12 1 1155 227.5 1. 9 0.2 0.03
H45 H45 7 47 8 0 7 18 17 19 14 1 1753 228 .,4 3.0 0.3 0.03
H46 H46 7 48 8 0 7 18 17 19 14 1 26312 228.1 48.0 4.8 0.03
H47 H47 7 50 8 1 7 18 17 19 15 1 10669 219.1 19.4 1.9 0.03
H48 H48 7 51 8 1 7 18 17 19 15 1 8434 228.9 15.2 1.5 0.03
H49 H49 7 53 8 2 7 18 17 19 17 1 6375 234.1 11.5 1.1 0.03
H50 H50 7 54 8 2 7 18 17 19 17 1 1005 235.1 1.6 0.2 0.03
H51 H51 7 56 8 3 7 18 17 19 18 1 72211 236.1 132.9 13 .3 0.03
H52 H52 7 57 8 3 7 18 17 19 18 1 6670 228.4 12.0 1.2 0.03
H53 H53 7 59 8 4 7 18 17 19 20 2 1005 224.9 0.7 0.1 0.03
H54 H54 8 0 8 4 7 18 17 19 20 1 19996 224.6 36.6 3.7 0.03
H55 H55 8 2 8 5 7 18 17 19 23 2 1199 232.4 0.8 0.1 0.03
H56 H56 7 47 8 0 7 18 17 19 23 1 6958 232.2 12.5 1.3 0.03
H57 H57 7 48 8 0 7 18 17 19 26 1 7440 228.1 13.4 1.3 0.03
H58 H58 7 50 8 1 7 18 17 19 26 1 2134 229.1 3.7 0.4 0.03
H59 H59 7 51 8 1 7 18 17 19 27 1 8183 227.2 14.8 1.5 0.03
H60 H60 7 53 8 2 7 18 17 19 27 1 1266 227.7 2.1 0.2 0.03
H61 H61 7 54 8 2 7 18 17 19 29 1 4046 219.3 7.2 0.7 0.03
H62 H62 7 56 8 3 7 18 17 19 29 1 5972 230.0 10.7 1.1 0.03
H63 H63 7 57 8 3 7 18 17 19 30 1 2156 230.1 3.7 0.4 0.03
H64 H64 7 59 8 4 7 18 17 19 30 1 3730 229.4 6.6 0.7 0.03
H65 H65 8 0 8 4 7 18 17 19 32 1 1162 231.1 1.9 0.2 0.03
H66 H66 8 2 8 5 7 18 17 19 32 1 2327 227.3 4.0 0.4 0.03
H67 H67 8 3 8 6 7 18 17 19 33 1 2634 232.0 4.6 0.5 0.03
H68 H68 8 5 8 6 7 18 17 19 33 1 1040 226.2 1. 7 0.2 0.03
H69 H69 8 6 8 7 7 1-8 17 19 35 1 41843 230.9 77.3 7.7 0.03
H70 H70 8 8 8 7 7 18 17 19 35 1 2637 231.7 4.6 0.5 0.03
H71 H71 8 9 8 8 7 18 17 19 36 1 2045 224.7 3.5 0.4 0.03
H72 H72 8 11 8 8 7 18 17 19 36 1 2692 228.6 4.7 0.5 0.03
H73 H73 8 12 8 9 7 18 17 19 38 1 71587 222.0 132. 8 13.3 0.03
H74 H74 8 14 8 9 7 18 17 19 38 1 3142 226.1 5.6 0.6 0.03
Page 2 of 3
-------------------CLIENT: ENERGY FUELS RESOURCES PROJECT: RADON FLUX MEASUREMENTS, WHITE MESA MILL PROJECT NO.: 17004.03
PILE: 3 BATCH: H SURFACE: SOIL AIR TEMP MIN: 59°F WEATHER: CLEAR, RAINED 0.10 inches AFTER PLACEMENT
AREA: COVER DEPLOYED: 7 16 17 RETRIEVED: 7 17 17 CHARCOAL BKG: 145 cpm wt. Out: 180.0 g.
FIELD TECHNICIANS: CE,DLC, CS, TE, MC COUNTED BY: DLC DATA ENTRY BY: DLC TARE WEIGHT: 29.2 g.
COUNTING SYSTEM I.D.: M01/D21, M02/D20 CAL. DUE: 7/17/18
GRID SAMPLE DEPLOY RETR:tV ANALYSTS MID·'l'IME CNT GROSS :t LLD
LOCAT'ION I.. D.. BR !·fIN l!R ?111I ?,10 D2\ YR HR l•Lf..N f':1IN) CCi'!JNTS ;,,tr IN /m:: s pCi B CO~l!{ENTS: ··~~·-·-~-·~·~-~~-·-H75 H75 8
H76 H76 8
H77 H77 8
H78 H78 8
H79 H79 8
H80 H80 8
H81 H81 8
H82 H82 8
H83 H83 8
H84 H84 8
H85 H85 8
H86 H86 8
H87 H87 8
H88 H88 8
H89 H89 8
H90 H90 8
H91 H91 8
H92 H92 8
H93 H93 8
H94 H94 8
H95 H95 8
H96 H96 8
H97 H97 8
H98 H98 8
H99 H99 8
HlOO HlOO 8
BLANK CANISTER ANALYSIS:
15 8 10 7 18 17 19 39 1 3494 222.9
17 8 10 7 18 17 19 39 1 5032 225.7
18 8 11 7 18 17 19 41 1 18156 232.1
3 8 6 7 18 17 19 41 1 2158 222.2
5 8 6 7 18 17 19 42 1 45696 230.7
6 8 7 7 18 17 19 42 1 19170 233.4
8 8 7 7 18 17 19 44 1 22456 231.4
9 8 8 7 18 17 19 44 1 3835 231.3
11 8 8 7 18 17 19 45 1 4405 224.1
12 8 9 7 18 17 19 45 1 7763 232.1
14 8 9 7 18 17 19 47 1 14516 223.4
15 8 10 7 18 17 19 47 1 1066 228.0
17 8 10 7 18 17 19 48 1 2084 226.0
18 8 11 7 18 17 19 48 1 1282 225.8
20 8 12 7 18 17 19 50 1 3951 232.1
20 8 12 7 18 17 19 50 1 1001 228.1
21 8 13 7 18 17 19 51 1 1089 232.8
21 8 13 7 18 17 19 51 l 1164 229.1
23 8 13 7 18 17 19 53 1 1408 222.1
23 8 13 7 18 17 19 53 1 16336 235.7
24 8 14 7 18 17 19 54 1 10157 237.9
24 8 14 7 18 17 19 54 1 3089 229.1
26 8 14 7 18 17 19 56 1 9555 223.6
28 8 16 7 18 17 19 56 1 23134 227.3
29 8 16 7 18 17 19 57 1 6453 221.1
31 8 17 7 18 17 19 57 1 46675 227.5
AVERAGE RADON FLUX RATE FOR THE CELL 3 COVER REGION:
6.2 0.6
9.1 0.9
33.6 3.4
3.7 0.4
84.5 8.5
35.2 3.5
41.5 4.1
6.8 0.7
7.9 0.8
14.1 1.4
26.8 2.7
1. 7 0.2
3.6 0.4
2.1 0.2
7.1 0.7
1.6 0.2
1.8 0.2
1.9 0.2
2.4 0.2
30.2 3.0
18.7 1.9
5.5 0.5
17.6 1.8
43.0 4.3
11. 8 1.2
87.1 8.7
11nci/m 2s
132.9 MAX
0.03
0.03
0.03
0.03
0.03
0.03
0.03
0.03
0.03
0.03
0.03
0.03
0.03
0.03
0.03
0.03
0.03
0.03
0.03
0.03
0.03
0.03
0.03
0.03
0.03
0.03
GRID S1\MPl1E REtrRI'l ANALYSIS !•1ID--TI!•fE C.'N'r CROSS {]ROSS RADON ± LLD
LOCATION r. D. HR MIN HR MIN HO DA YR HR MIN {MIN) COUNTS WT IN pCi./m" s pCi/:m 2 $ pC.i /m1 s COMMENT:.:;!
H BLANK 1 H BLANK 1 6 50 7 50 7 18 17 10 21 10 1856 209.5 0.07 0.02 0.03 CONTROL
H BLANK 2 H BLANK 2 6 50 7 50 7 18 17 10 21 10 1735 205.6 0.05 0.02 0.03 CONTROL
H BLANK 3 H BLANK 3 6 50 7 50 7 18 17 10 42 10 1797 208.3 0.06 0.02 0.03 CONTROL
H BLANK 4 H BLANK 4 6 50 7 50 7 18 17 10 42 10 1829 210.9 0.06 0.02 0.03 CONTROL
H BLANK 5 H BLANK 5 6 50 7 50 7 18 17 10 53 10 1836 209.6 0.06 0.02 0.03 CONTROL
AVERAGE BLANK CANISTER ANALYSIS FOR THE CELL 3 COVER REGION: 0.06 pCi/m2s
Page 3 of 3
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AppendixD
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Sample Locations Map (Figure 2)
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I D
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\ ' '
0 H30
Hi H«l2
CJ
0 H02 H~ 0
0 H04 0
H13 0 Hos 0
H12 0 H06
0 Hll 0
Hl6 0 HlO 0
H17 0 H09 0 ~18 O HOB
0 H19 0
H27 0 11£GJoN H20 0
H26 0 -H21
H25 0
H24 0
0 H23 0
H31 0 H22
H32 0 H33 0 H34 0
0 H35 0
H41 0 H36
H40 0
H39 0
H38 0
H37
.... CELl.411-
0 H07
-CEU.1-
0
H100 0
0
0 H98 H55
BEACH 11£GJON
0
H66
..au.2-
0 H54
0
H65
0
H53
0
H64
0
H52 0 H51
-CELL 3-
0 0
0 H63 0
H62
B'H69 ~ .81
0 ~~ H79 .:, .3
1 0 H82
0
HSO 0
H49 0
H48
0 0
H61 H60 H~
-C01fE.!tEl) RcGJoN-0. 0
H72 Hl3 O
H74
0
•
0 ,:~ H47
H45
0 H58 0
H57 0 H56
0 H75 0
0 H95
H83 0 H76
-CELL4A-
0 H94
H9~
H84
0 H92 0 H91
0 H85
0 H90
0
H86
0
H89
0 H87
-I
WHITE MESA MILL
BLANDING. UTAH
NESHAPS 2017
CELL3
THIRD QUARTER 2017
07 /16/17-07 /17 /17
PREPARED FOR
ENERGY FUELS RESOURCES
Willl.!2
H01 0 -SAMPLE LOCATION ON
COVERED AREAS
GOl • -SAMPLE LOCATION ON
BEACH AREAS
FIGURE2
N
t
SCALE IN FEET ----200 100 0 200 400 ,,,,,o
ENVIRONMENTAL, LLC
THIS DRAWING ISTIHE PROPERTYOFffiLCO
ENVIRONMENTAL. LLC, AND IS NOTTO BE
REPRODUCED, MODIFIED OR USED FOR ANY
OTHER PROJECT OR EXTENSION OFTIHIS PROJECT
EXCEPT BY AGREEMENT WITH TELLCO.
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ATTACHMENT 4
Tellco Report for Radon Flux Monitoring
October 2017
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National Emission Standards for Hazardous Air Pollutants
2017 Radon Flux Measurement Program
White Mesa Mill
6425 South Highway 191
Blanding, Utah 84511
4th Quarter 2017 Sampling Results
Cell3
Prepared for: Energy Fuels Resources (USA) Inc.
6425 S. Highway 191
P.0.Box809
Blanding, Utah 84511
Prepared by: Tellco Environmental
P.O. Box 3987
Grand Junction, Colorado 81502
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TABLE OF CONTENTS
Page
1. INTRODUCTION ........................................................................................................................... 1
2. SITE DESCRIPTION ...................................................................................................................... 1
3. REGULATORY REQUIREMENTS FOR THE SITE .................................................................... l
4. SAMPLING METHODOLOGY ..................................................................................................... 2
5. FIELD OPERATIONS .................................................................................................................... 2
5 .1 Equipment Preparation ....................................................................................................... 2
5 .2 Sample Locations, Identification, and Placement.. ........................................................... 3
5.3 Sample Retrieval ............................................................................................................... 3
5.4 Environmental Conditions ................................................................................................ 3
6. SAMPLE ANALYSIS ...................................................................................................................... 4
6.1 Appararus ............................................................................................................................ 4
6.2 Sample Inspection and Documentation ............................................................................. 4 .
6.3 Background and Sample Counting .................................................................................... 4
7. QUALITY CONTROL (QC) AND DATA VALIDATION ........................................................... 5
7 .1 Sensitivity ... ······························~··································································· ..................... 5
1·.2 Precision ......................... ,. ..................................................................................................... 5
7 .3 Accuracy ............................................................................................................................ 6
7.4 Completeness ..................................................................................................................... 6
8. CALCULAT~ONS .............................................................................................................................. 6
9. RESULTS ......................................................................................................................................... 7
9 .1 Mean Radon Flux ............................................................................................................... 7
9 .2 Site Results .......................................................................................................................... , 8
References ............................................................................................................................................... 9
Figure l ...................................................................................................................................... , ............ 10
Appendix A. Charcoal Canister Analyses Support Documents
Appendix B. Recount Data Analyses
Appendix C. Radon Flux Sample Laboratory Data, Including Blanks
Appendix D. Sample Locations Map (Figure 2)
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1. INTRODUCTION
During October 10-12, 2017 Tellco Environmental, LLC (Tellco) of Grand Junction, Colorado,
provided support to Energy Fuels Resources (USA) Inc. (Energy Fuels) to conduct radon flux
measurements at its White Mesa Mill site regarding the required National Emission Standards for
Hazardous Air Pollutants (NESHAPs) Radon Flux Measurements. These measurements are required
of Energy Fuels to show compliance with Federal Regulations (further discussed in Section 3 below).
The standard is not an average per facility, but is an average per radon source. The standard allows
mill owners or operators the option of either making a single set of measurements or making
measurements over a one year period (e.g., weekly, monthly, or quarterly intervals). For the calendar
year 2017, Energy Fuels is conducting the radon flux measurements for Cell 3 at quarterly intervals.
Tellco was contracted to provide radon canisters, equipment and canister placement personnel, as well
as lab analysis of samples. Energy Fuels personnel provided support for loading and unloading
charcoal from the canisters. This report details the procedures employed by Energy Fuels and Tellco
to obtain the results presented in Section 9.0 of this report for the fourth quarter 2017 radon flux
measurements for Cell 3.
2. SITE DESCRIPTION
The White Mesa Mill facility is situated in San Juan County in southeastern Utah, six miles south of
Blanding, Utah. The mill began operations in 1980 for the purpose of extracting uranium and
vanadium from feed stocks.
At the time of this fourth quarter 2017 sampling, Cell 3 had a total area of 288,858 m2 and was
comprised of two source regions that require NESHAPs radon flux monitoring: af proximately
257,616 m2 of interim soil cover of varying thickness and approximately 29,016 _m of ex.posed
tailings beaches. The remaining approximately 2,226 m2 was covered by standing liquid in lower
elevation areas. These region areas were approximately the same configuration as they were during
the third quarter 2017.
3. REGULATORY REQUIREMENTS FOR THE SITE
Radon emissions from the uranium mill tailings at this site are regulated by the State of Utah's
Department of Environmental Quality, Division of Air Quality under generally applicable standards
set by the Environmental Protection Agency (EPA) for Operating Mills. Applicable regulations are
specified in 40 CFR Part 61, Subpart W, National Emission Standards for Radon Emissions from
Operating Mill Tailings, with technical procedures in Appendix B. At present, there are no Subpart T
uranium mill tailings at this site. These regulations are a subset of the NESHAPs. According to
subsection 61.252 Standard, (a) radon-222 emissions to ambient air from an existing uranium mill
tailings pile shall not exceed an average of 20 pCi/m2-s for each pile, or cell. Subsection 61.253,
Determining Compliance, states that: "Compliance with the emission standard in this subpart shall be
determined annually through the use of Method 115 of Appendix B."
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4. SAMPLING METHODOLOGY
Radon emissions were measured using Large Area Activated Charcoal Canisters (canisters) in
conformance with 40 CFR, Part 61, Appendix B, Method 115, Restrictions to Radon Flux
Measurements, (EPA, 2017). These are passive gas adsorption sampling devices used to determine
the flux rate of radon-222 gas from a surface. The canisters were constructed using a IO-inch
diameter PVC end cap containing a bed of 180 grams of activated, granular charcoal. The prepared
charcoal was placed in the canisters on a support grid on top of a Y2 inch thick layer of foam and
secured with a retaining ring under 1 ~ inches of foam (see Figure 1, page 10).
Two hundred sampling locations were distributed throughout Cell 3 ( comprised of two source regions
requiring monitoring) as depicted on the Sample Locations Map (see Figure 2, Appendix D). Each
charged canister was placed directly onto the surface ( open face down) and exposed to the surface for
24 hours. Radon gas adsorbed onto the charcoal and the subsequent radioactive decay of the
entrained radon resulted in radioactive lead-214 and bismuth-214. These radon progeny isotopes emit
characteristic gamma photons that can be detected through gamma spectroscopy. The original total
activity of the adsorbed radon was calculated from these gamma ray measurements using calibration
factors derived from cross-calibration of standard sources containing known total activities of
radium-226 with geometry identical to the counted samples and from the principles of radioactive
decay.
After approximately 24 hours, the exposed charcoal was transferred to a sealed plastic sample
container (to prevent sample loss and/or further exposure during transport), identified and labeled, and
transported to the Tellco laboratory in Grand Junction, Colorado for analysis.
5. FIELD OPERATIONS
5.1 Equipment Preparation
All charcoal was dried at 110°C before use in the field. Unused charcoal and recycled charcoal were
treated the same. 180-gram aliquots of dried charcoal were weighed and placed in sample containers.
Proper balance operation was verified daily by checking a standard weight. The balance readout
agreed with the known standard weight to within ± 0.1 percent.
After acceptable balance check, empty containers were individually placed on the balance and the
scale was re-zeroed with the container on the balance. Unexposed and dried charcoal was carefully
added to the container until the readout registered 180 grams. The lid was immediately placed on the
container and sealed with plastic tape. The balance was checked for readout drift between readings.
. Sealed containers with unexposed charcoal were placed individually in the shielded counting well,
with the bottom of the container centered over the detector, and the background count rate was
documented. Three five-minute background counts were conducted on ten percent of the containers,
selected at random to represent the "batch". If the background counts were too high to achieve an
acceptable lower limit of detection (LLD), the entire charcoal batch was labeled non-conforming and
recycled through the heating/drying process.
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In accordance with 40 CFR, Part 61, Appendix B, Method 115:
6.
6.1
• Measurements were not initiated within 24 hours of rainfall.
• No rainfall occurred during the Cell 3 sampling after canister placement
• All of the canister seals were observed intact during retrieval of the samples.
• The minimum ambient air temperature measured by Tellco's onsite thermometer during the
Cell 3 sampling was approximately 33° F and occurred during the Beach region sampling
period (10/10/17-10/11/17); the ground was not frozen.
SAMPLE ANALYSIS
Apparatus
Apparatus used for the analysis:
• Single-or multi-channel pulse height analysis system, Ludlum Model 2200 with a
Teledyne 3" x 3" sodium iodide, thallium-activated (Nal(Tl)) detector.
. • Lead shielded counting well approximately 40 cm deep with 5-cm thick lead walls and a 7-
cm thick base and 5 cm thick top.
• National Institute of Standards and Technology (NIST) traceable aqueous solution radium-
226 absorbed onto 180 grams of activated charcoal.
• Ohaus Port-0-Gram balance with 0.1-gram sensitivity.
6.2 Sample Inspection and Documentation
Once in the laboratory, the integrity of the samples was verified by visual inspection of the sample
containers. Laboratory personnel checked the containers and verified that the data sheet was
complete.
No damaged containers were observed during inspection at the Tellco analytical laboratory. A total of
200 samples and ten blanks for Cell 3 were ultimately verified as valid.
6.3 Background and Sample Counting
The gamma ray counting system was checked daily, including background and radium-226 source
measurements prior to and after each counting session. Based on calibration statistics, using two
sources with known radium-226 content, background and source control limits were established for
each Ludlum/Teledyne counting system with shielded well (see Appendix A).
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Gamma ray counting of exposed charcoal samples included the following steps:
• The length of count time was determined by the activity of the sample being analyzed,
according to a data quality objective of a minimum of 1,000 accrued counts for any given
sample.
• The sample container was centered on the Nal detector and the shielded well door was
closed.
• The sample was counted over a determined count length and then the mid-sample count
time, date, and gross counts were documented on the radon flux measurements data sheet
and used in the calculations.
• The above steps were repeated for each exposed charcoal sample.
• Approximately 10 percent of the containers counted were selected for recounting. These
containers were recounted within a few days following the original count.
7. QUALITY CONTROL (QC) AND DATA VALIDATION
Charcoal flux measurement QC samples included the following intra-laboratory analytical frequency
objectives:
• Blanks, 5 percent, and
• Recounts, 10 percent
All sample data were subjected to validation protocols that included assessments of sensitivity,
precision, accuracy, and completeness. As described below, all Method 115-required data quality
objectives (EPA, 2017) were attained.
7.1 Sensitivity
A total of ten blanks were analyzed by measuring the radon progeny activity in samples subjected to
all aspects of the measurement process, excepting exposure to the source region. These blank sample
measurements comprised approximately five percent of the field measurements. The results of the
blank sample radon flux rates ranged from 0.05 to 0.09 pCi/m2-s, with an average of approximately
0.07 pCi/m2-s. The lower limit of detection (LLD) was approximately 0.03 pCi/m2-s.
7.2 Precision
Twenty recount measurements, distributed throughout the sample sets, were performed by replicating
analyses of individual field samples (see Appendix B). These recount measurements comprised
approximately 10 percent of the total number of samples analyzed. The precision, expressed as
relative percent difference (RPD), of the Cell 3 recount measurements that were above 1 pCi/m2-s
ranged from approximately 0.0 percent to 4.7 percent with an average precision of approximately 1.3
percent RPO. This complies with the precision objective of 10 percent.
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7.3 Accuracy
Accuracy of field measurements was assessed daily by counting two laboratory control samples with
known Ra-226 content. Accuracy of these lab control sample measurements, expressed as percent
bias, ranged from approximately -2.4 percentto +0.3 percent. The arithmetic average bias of the lab
control sample measurements was approximately -0.8 percent (see Appendix A). This complies with
the accuracy objective of+/-10 percent bias.
7 .4 Completeness
A combined total of 200 samples were verified as valid, representing 100 percent completeness for
Cell 3, which complies with the completeness objective of 85 percent.
8. CALCULATIONS
Radon flux rates were calculated for charcoal collection samples using calibration factors derived
from cross-calibration to sources with known total activity with identical geometry as the charcoal
containers. A yield efficiency factor was used to calculate _the total activity of the sample charcoal
containers. Individual field sample result values presented were not reduced by the results of the field
blank analyses.
In practice, radon flux rates were calculated by a database computer program. The algorithms utilized
by the data base program were as follows:
Equation 8.1:
pCi Rn-222/m2sec = [Ts* A *b*~slcril.13~
where: N = net sample count rate, cpm under 220-662 keV peak
Ts = sample duration, seconds
b = instrument calibration factor, cpm per pCi; values used:
0.1698, forM-01/D-21 and
0.1701, for M-02/D-20
d = decay time, elapsed hours between sample mid-time and count mid-time
A = area of the canister, m2
Equation 8.2:
Gross Sample, cpm Background Sample, cpm , ___ _....;;__ __ +---------
SampleCount, t, min Background Count,t,min
Error,2u = 2 x --------------------x Sample Concentration
Net,cpm
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Equation 8.3:
2Jl + (4.65~)
LLD• [Ts* A *b•o.st.ts~
where: 2.71 = constant
4.65 = confidence interval factor
Sb = standard deviation of the background count rate
Ts = sample duration, seconds
b = instrument calibration factor, cpm per pCi; values used:
0.1698, forM-01/0-21 and
0.170 l, for M-02/0-20
d = decay time, elapsed hours between sample mid-time and count mid-time
A = area of the canister, m2
9. RESULTS
9.1 Mean Radon Flux
Referencing 40 CFR, Part 61, Subpart W, Appendix B, Method 115 -Monitoring for Radon-222
Emissions, Subsection 2.1. 7 -Calculations, "the mean radon flux for each region of the pile and for
the total pile shall be calculated and reported as follows:
(a) The individual radon flux calculations shall be made as provided in Appendix A EPA
86(1). The mean radon flux for each region of the pile shall be calculated by summing all
individual flux measurements for the region and dividing by the total number of flux
measurements for the region.
(b) The mean radon flux for the total uranium mill tailings pile shall be calculated as follows:
li.A1 + · · · JzA-2 £+] · · · M1
At
Where: J5 = Mean flux for the total pile (pCi/m2-s)
Ji = Mean flux measured in region i (pCi/m2-s)
Ai = Area ofregion i (m2)
At = Total area of the pile (m2)"
40 CFR 61, Subpart W, Appendix B, Method 115, Subsection 2.1.8, Reporting states "The results of
individual flux measurements, the approximate locations on the pile, and the mean radon flux for each
region and the mean radon flux for the total stack [pile] shall be included in the emission test report. Any
condition or unusual event that occurred during the measurements that could significantly affect the results
should be reported."
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9.2 Site Results
Site Specific Sample Results (reference Appendix C)
(a) The mean radon flux for each region within Cell 3 is as follows:
Cell 3 -Beaches Region = 44.7 pCi/m2-s (based on 29,016 m2 area)
Cell 3 -Covered Region = 8.5 pCi/m2-s (based on 257,616 m2 area)
Cell 3 -Water Region = 0.0 pCi/m2-s (based on 2,226 m2 area)
Note: Reference Appendix C of this report for the entire summary of individual measurement results.
(b) Using the data presented above, the calculated mean radon flux rate for Cell 3 is as follows:
Cell 3 = 12.1 pCi/m2-s
(44.7)(29.016)+(8.5)(257.616)+(0.0)(2,226) = 12.1
288,858
As shown above, the arithmetic mean radon flux rate for Cell 3 for the fourth quarter 2017 sampling
is below the NRC and EPA standard of 20 pCi/m2-s. Appendix C is a summary of individual
measurement results, including blank sample analysis.
No condition or unusual event occurred during the measurements that could significantly affect the
reported results.
Sample locations are depicted on Figure 2, which is included in Appendix D. Figure 2 was produced
byTellco.
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References
U. S. Environmental Protection Agency, Radon Flux Measurements on Gardinier and Royster
Phosphogypsum Piles Near Tampa and Mulberry, Florida, EPA 520/5-85-029, NTIS #PB86-
161874, January 1986.
U.S. Environmental Protection Agency, Title 40, Code of Federal Regulations, July 2017.
U. S. Nuclear Regulatory Commission, Radiological Efjluent and Environmental Monitoring at
Uranium Mills, Regulatory Guide 4.14, April 1980.
U.S. Nuclear Regulatory Commission, Title JO, Code of Federal Regulations, Part 40, Appendix A,
January 2017.
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Figure 1
Large Area Activated Charcoal Canisters Diagram
10
1:t2-,.ri. Th.1ck
!krull'ato PU
I '2·in ll·1ica. C•1<1rcuo•
$uppOUI lir"II
f111.111n,r
Sp1in111
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Appendix A
Charcoal Canister Analyses Support Documents
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I Appendix B
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Recount Data Analyses
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AppendixC
Radon Flux Sample Laboratory Data (including Blanks)
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AppendixD
Sample Locations Map (Figure 2)
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Appendix A
Charcoal Canister Analyses Support Documents
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-------------------
ENERGY FUELS RESOURCES
WHITE MESA MILL, BLANDING, UTAH
2017 NESHAPs RADON FLUX MEASUREMENTS
CELL3
SAMPLING DATES: 10/10/17-10/12/17
ANALYSIS DATES: 10/13/17-10/14/17
SYSTEM COUNT Bkg Counts (1 min. each)
I.D. DATE #1 #2
M-01/D-21 7/18/2017 135 148
M-01/D-21 7/18/2017 134 146
M-01/D-21 7/19/2017 141 149
M-01/D-21 7/19/2017 129 137
M-01/D-21 7/18/2017 135 148
M-01/D-21 7/18/2017 134 146
M-01/D-21 7/19/2017 141 149
M-01/D-21 7/19/2017 129 137
M-02/D-20 7/18/2017 147 151
M-02/D-20 7/18/2017 127 133
M-02/D-20 7/19/2017 128 138
M-02/D-20 7/19/2017 149 156
M-02/D-20 7/18/2017 147 151
M-02/D-20 7/18/2017 127 133
M-02/D-20 7/19/2017 128 138
M-02/D-20 7/19/2017 149 156
#3
122
149
136
148
122
149
136
148
148
157
155
135
148
157
155
135
ACCURACY APPRAISAL TABLE
FOURTH QUARTER 2017
Source Counts (1 min. each)
#1 #2 #3
10266 10216 10217
10010 10221 10302
10089 10315 10264
10187 10136 10141
10208 10244 10056
10155 10252 10173
10181 10091 10026
10136 10159 10329
10052 10086 10210
10016 9987 9952
9966 10296 10014
10077 10256 9980
9976 10126 10296
10098 10185 10291
10187 10044 9984
9962 9967 10061
AVG NET YIELD FOUND SOURCE
cpm cpm/pCi pCi ID
10098 0.1698 59470 GS-04
10035 0.1698 59097 GS-04
10081 0.1698 59368 GS-04
10017 0.1698 58991 GS-04
10034 0.1698 59095 GS-05
10050 0.1698 59189 GS-05
9957 0.1698 58642 GS-05
10070 0.1698 59305 GS-05
9967 0.1701 58597 GS-04
9846 0.1701 57884 GS-04
9952 0.1701 58505 GS-04
9958 0.1701 58540 GS-04
9984 0.1701 58695 GS-05
10052 0.1701 59097 GS-05
9931 0.1701 58385 GS-05
9850 0.1701 57907 GS-05
AVERAGE PERCENT BIAS FOR ALL ANALYTICAL SESSIONS:.
KNOWN %BIAS
pCi
59300 0.3%
59300 -0.3%
59300 0.1%
59300 -0.5%
59300 -0.3%
59300 -0.2%
59300 -1.1%
59300 0.0%
59300 -1.2%
59300 -2.4%
59300 -1.3%
59300 -1.3%
59300 -1.0%
59300 -0.3%
59300 -1.5%
59300 -2.3%
-0.8%
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CHARCOAL CANISTER ANALYSIS SYSTEM
calibnttion Check 4-
System ID: M ~ 0 \ / }) --2 I Calibration Date: 7 // 7 / I ·1 Due Date: 7 / l I /1 B ...... ~~--,..~--~--~ ..->
Scaler SIN: __ 5"""-=-'l 5..__7...,__1.. ____ High Voltage: ~ 11..tJ ~ Window: 4.42 Thrshld: 2.20
Detector SIN: _0_'::\..L-:-1 7.,,,_· _3.ac...;:3;c.._ __ Source ID/SN: Rq-Z. Z-7'&.S,.. 04 Source Activity: SO). 3 '6f Ci
Blank Canister Bkgd. Range, cpm: 2 a = I 01.u to I L3'1 30'= 0) 5 to (t;.·-z_
Gross Source Range, cpm: 2a= C)qs-J to IOlJ:58 3a= 0)82--j to 1D5f5
Technician: 322_, C<Jr:: ~
All counts times are one minute
Date By Baclc11mund Counts (l min. each Source Counts C1 min. each) ok?
#1 #2 #3 Av'i!. #1 #2 #3 Avera2e YIN
i Oll'!lf 11 Vlf p ".:• I~ ·'o l "l,. "1, I• ·, fn--.zt .. (,1 I 0"1..1 l, I fJ?_ ,-, ,o~-~·\ "' lC, 1-'!JJ II 171,,..e_ I A ,4 l'· ·c.., l '1 C. I' ~ 1001r l 0":2.."2-1 10·.2n,, ' t') i'7 1:?I {/
\0 11t.O r1 'OI~ -j c.. I I'• ,() ,-~ , 1 L. ...-z_. i.00<; ~" 10~.c I('\·-, ,-:ii I O "'"2,. "'2,.. "3 '..J
/OJ 114111 g-LJ)_. I '"2..-0\ ,~ -J"fJ; ,-.. ,t, \ h \ c:: ~'1 \Q\~l~ lnlU.\ l01SS '1' j .
YIN: Y = average background and source cpm falls within the control limits.
N = average background and source cpm does not fall within the control limits.
The acceptable ranges were detennined from prior baclcground and source check data.
- - - - ----- --------- -CLIENT: ENERGY FUELS RESOURCES PROJECT: RADON FLUX MEASUREMENTS, WHITE MESA MILL PROJECT NO.: 17004.04
PILE:3 BATCH:J SURFACE: SOIL AIR TEMP MIN: 42°F WEATHER: NO RAIN
AREA:COVER DEPLOYED: 10 11 17 RETRIEVED: 10 12 17 CHARCOAL BKG: 149 cpm Wt. Out: 180.0 g.
FIELD TECHNICIANS: CE,DLC, CS, TE COUNTED BY: DLC DATA ENTRY BY: DLC TARE WEIGHT: 29.2 g.
COUNTING SYSTEM I.D.: M01/D21, M02/D20 CAL. DUE: 7/17/18
GRID Sl·J1PLE DEPLOY RETRIV ANALYSIS MID-TIME CNT GROSS GROSS RADON ± LLD
LOCATION I. D. HR MIN HR MIN MO DA YR HR MIN (MIN) COUNTS WT IN pCi/m 2 s pCi/m 2 s pCi/m 2 s COMMENTS;
J75 J75 9 59 9 47 10 13 17 15 27 1 2544 210.7 4.3 0.4 0.03
J76 J76 10 1 9 48 10 13 17 15 27 1 4206 207.7 7.2 0.7 0.03
J77 J77 10 3 9 49 10 13 17 15 28 1 7576 214.2 13.3 1.3 0.03
J78 J78 9 43 9 39 10 13 17 15 28 1 1950 219.0 3.2 0.3 0.03
J79 J79 9 45 9 40 10 13 17 15 30 1 37932 212.4 67.4 6.7 0.03
J80 J80 9 47 9 41 10 13 17 15 30 1 8794 214.7 15.4 1.5 0.03
J81 J81 9 49 9 42 10 13 17 15 31 1 23613 214.5 41. 9 4.2 0.03
J82 J82 9 51 9 43 10 13 17 15 31 1 1481 217.7 2.4 0.2 0.03
J83 J83 9 53 9 44 10 13 17 15 33 1 2729 212.0 4.6 0.5 0.03
J84 J84 9 55 9 45 10 13 17 15 33 1 5053 213 .9 8.8 0.9 0.03
JBS JBS 9 57 9 46 10 13 17 15 34 1 15396 212.8 27.3 2.7 0.03
J86· J86 9 59 9 47 10 13 17 15 35 2 1440 213.8 1.0 0.1 0.03
J87 J87 10 1 9 48 10 13 17 15 37 1 5625 212.4 9.8 1. 0 0.03
J88 J88 10 4 9 so 10 13 17 15 37 1 1090 216.9 1. 7 0.2 0.03
J89 J89 10 6 9 51 10 13 17 15 38 l 1872 214.3 3.1 0.3 0.03
J90 J90 10 6 9 51 10 13 17 15 38 1 1457 210.7 2.3 0.2 0.03
J91 J91 10 8 9 52 10 13 17 15 40 1 1273 213.3 2.0 0.2 0.03
J92 J92 10 8 9 52 10 13 17 15 40 l 4049 214.6 7.0 0.7 0.03
J93 J93 10 10 9 53 10 13 17 15 41 1 2711 212.4 4.6 0.5 0.03
J94 J94 10 10 9 53 10 13 17 15 41 1 12528 213.l 22.2 2.2 0.03
J95 J95 10 18 9 54 10 13 17 15 43 1 10751 217.0 19.1 1. 9 0.03
J96 J96 10 20 9 54 10 13 17 15 43 1 3530 215.0 6.1 0.6 0.03
J97 J97 10 22 9 55 10 13 17 15 44 l 7843 226.6 13.9 1.4 0.03
J98 J98 10 18 10 2 10 13 17 15 44 1 9203 213.7 16.2 1.6 0.03
J99 J99 10 20 10 3 10 13 17 15 45 1 1321 217.6 2.1 0.2 0.03
JlOO JlOO 10 22 10 4 10 13 17 15 45 1 16231 213.2 28.8 2.9 0.03
AVERAGE RADON FLUX RATE FOR THE CELL 3 COVER REGION: snci/m 2 s
BLANK CANISTER ANALYSIS: 76.1 MAX
GRID SAMPLE RETRIV ANALYSIS MID-TIME CNT GROSE.; GROSS RADON ± LLD
LOCATION I. D. HR MIN HR MIN MO DA YR HR MIN (MIN) COUNTS WT IN pCi/m 2 s pCi/m' s pCi/rn' s COMMENTS;
J BLANK l J BLANK l 9 10 9 30 10 13 17 11 0 10 1818 209.0 0.06 0.02 0.03 CONTROL
J BLANK 2 J BLANK 2 9 10 9 30 10 13 17 11 0 10 1802 213.1 0.05 0.02 0.03 CONTROL
J BLANK 3 J BLANK 3 9 10 9 30 10 13 17 11 11 10 1799 209.5 0.05 0.02 0.03 CONTROL
J BLANK 4 J BLANK 4 9 10 9 30 10 13 17 11 11 10 1848 209.2 0.06 0.02 0.03 CONTROL
J BLANK 5 J BLANK 5 9 10 9 30 10 13 17 11 22 10 1869 210.1 0.06 0.02 0.03 CONTROL
AVERAGE BLANIC CANISTER ANALYSIS FOR THE CELL 3 COVER REGION: 0.06 pCi/m 2 s
Page 3 of 3
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I AppendixD
I Sample Locations Map (Figure 2)
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\ . .
0 J30
0 J44 0 J43 ll2
CJ
0 J02 0 J03 0
0 J04 0
J13 0 JOS 0
J12 0 J06
0 Jl 1 0
J16 0 JlO 0
J17 0 J09 0 J18 0 JOB
0 -covEREo J19 0
J27 0 REGION J20 0
J26 0 -J21
J25 0 J24 0
0 J23 0
J31 0 )22
J32 0 J33 · 0 J34 0
J35 0
J!1 0 J36
J40 0
J39 0
J38 0
J37
-CELL48-
0 J07
-<Elt.1-
0
J100 0 0
0 J98 JSS
BEACH REGION
0
J66
-c£ll2-
0 JS4
0
65
0
J53
0
J64
0 J52 0 J51
-CELL3-
0 0
0
J63 .0
J62
J68 J69 0 O
BouNDAR'f lfl:-p,,._ ~ .... ~ _m
0 --· ll'ffElyc, -··"'C.'!Ot
J79 ~ C\ O
JS J82
0
JSO 0
J49 ·o
J48
0 0
J61 J60 J:
-covEREo REG/ON-
O 0
J72 J73 0
J74
0
0
J47
0 J58
0 )75
0 J46
0 J57
0 0
0 J95
J83 0 J76
-c£LL4A ...
0 J94 J9'! 0 J92
J84
0 J91
0 J85
0 )90
0 J86
0
J89
0
)67
•
0 J56
WHITE MESA MILL
BLANDING, UTAH
NESHAPS 2017
CELL3
FOURTH QUARTER 2017
10/10/17-10/12/17
PREPARED FOR
ENERGY FUELS RESOURCES
LEGEND
J01 0 -SAMPLE LOCATION ON
COVERED AREAS
101 • -SAMPLE LOCATION ON
BEACH AREAS
FIGURE2
N
SCM.E IN FEET ----200 100 0 200 400
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