DRC-2009-008062 - 0901a068803ff74e

DENISO
Þenlcon lilnor (l,l3A) Corp.
l0å0î?th Stnrt, Sulb 950
0cÉror, GO 80¿66
U8A
www.deribonnlrianco¡rt
MINES
March 26,2009
Mr. Bryce Bird
Division of Air Quality
Utah Department of Environmental Quality
1140 Nor4th 1950 West
P.O. Box 144820
Salt Lake City, UT 84114-4820
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ll/ÁB J0 Z¡¡¡s i
t.,' i..ì !lfl;'ii';;;;', ,l'l ì
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Dear Mr, Bird:
Re: White Mesa Urcnium Mill-National Emission Standards for Radon Emissions
From Operating Uraniurn Mill Tailings, 40 Cþ-R Part 61, Subpart rff-Annual Report
Please find enclosed the annual repoft pertaining to tadon emissions fi'orn the tailings impoundment at
the White Mesa Mill. The results of the 2008 testing indicate that the facility was in compliance with
the2}pCi/m2-sec radon emanation standard at3,9 and 3.1 pCi/m2-sec for Cells 2 and3, respectively.
In accordance with the requirement of the NESHAP standard my signature below affirms the
fu llowing certification :
"I cettify under penalty of law that I have personally examined and am familiar with the
inforrnation subrnitted herein and based on my inquiry of those inclivicluals immediately
responsible for obtaining the information, I believe that the submitted information is
h'ue, accurate and complete. I am aware that there are significant penalties for
submitting false infonnation including the possibility of fine and irnprisonmentl'
If you should have any questions regarding this report please contact Mt. Steven Landau, Denison's
Manager of Environmental Affairs.
Yours very huly,
DENrsoN Mnns (USA) Conr.
Hanor,n R. Rognnrs
Exncurrvn VrcE PnrsronNt, U.S. OpputroNs
TABLE OF CONTENTS
l.INTRODUCTION
2. SITE HISTORY AND DESCRIPTION
3. REGULATORY REQUIREMENTS FOR THE SIT8..........
4. SAMPLING METHODOLOGY
5. FIELD OPERATIONS ............
5. 1 Equipment Preparation...................
5.2 Sample Locations, Identification, and Placement-...
5.3 Sample Retrieval
5.4 Environmental Conditions
6. SAMPLE ANALYSIS
6.1 Apparatus
6.2 Sample lrspection and Documentation.'.
6.3 Background and Sample Counting
7. QUALITY CONTROL (QC) AND DATA VALIDATION
7.1 Sensitivity.....
7.2 Precision........
7.3 Accuracy.......
7.4 Completeness
8. CALCULATIONS......
9. RESULTS..........
9.1 Mean Radon FIux..............
9.2 Site Results
References
Figure I ................
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)
Page
I
Standard, (a) radon-222 emissions to ambient air from an existing uranium mill tailings pile shall not
exceed an average of 20 picoCuries per square meter per second þCi/m2-s) for each pile or region'
Subsection 6l.2i3,Determining Compliance, states that: "Compliance with the emission standard in
this subpart shall be determined annually through the use of Method 1 l5 of Appendix B-"
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, 2008). These are passive gas adsorption sampling devices used to determine
the flux rate of radon222 gas from a surface. The canisters were constructed using a l0-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 gld on top of a Y, inch thick layer of foam and
secured with a retaining ring under 1% inches of foam (see Figure 1, page 10)'
One hundred canisters were placed in each region. Due to worker health and safety concerns,
measurement of the wet beach areas was limited to areas readily accessible by foot. Each charged
canister was placed directly onto the surface (open face down) and exposed to the surface for 24
hours. Radon gas adsorbeã onto the charcoal and the subsequent radioactive decay of the entrained
radon resulted in radioactive lead-214 and bismuth-2l4. These radon progeny isotopes emit
characteristic gamma photons that canbe detected through gamma spectroscopy. The original total
activity of the;dsorbed 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 24 hours, the exposed charcoal was transfened to a sealed plastic sample container (to prevent
radon loss and fuither exposure during transport), identified and labeled, and transported to the Tellco
laboratory in Grand Junótion, Colorado for analysis. Upon completion of on-site .activities, the field
equipment was alpha- and beta-gamma scanned for possible contamination resulting from fieldwork
activities. All field equipment was surveyed by Denison Mines Radiation Safety personnel and
released for unrestricteà ùse. Tellco personnel maintained custody of the samples from collection
through analysis.
5. FIELD OPERATIONS
5.1 Equipment PreParation
All charcoal was dried at 1 10oC before use in the field. Unused charcoal and recycled charcoal were
treated the same. 18g-gram alíquots of dried charcoal were weighed and placed in sample containers.
proper balance operation was verified daily by checking a standard weight. The balance readout
agrãed with the known standard weight to within t 0.1 percent. (Appendix A).
2
In accordance with 40 CFR, Part 61, Appendix B, Method 115:
. Measurements were not initiated within 24 hours of rainfall.
. No rainfall occurred during any of the sampling periods.
. None of the radon measurements presented in this report were perfolned durÌng
temperatures below 35"F or on frozen ground (the minimum air temperature recorded at
the site during the collection periods was 39oF).
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 (NaI(Tl)) detector'
. Lead shielded counting well approximately 40 cm deep with 5-cm thick lead walls and a7-
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 Model C501 balance with O.l-gram sensitivity.
6.2 Sample Inspection and Documentation
Once in the laboratory, the integrity of each charcoal container was verified by visual inspection of the
plastic container. Laboratory staff documented damaged or unsealed containers and verified that the
data sheet was complete.
One sample (C39) was lost in the field due to charcoal spillage. All of the remaining 399 sample
containers received and inspected at the Tellco analytical laboratory were 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).
Gamma ray counting of exposed charcoal samples included the following steps:
o 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.
4
7.4 Completeness
All 100 samples from the Cell2 Region were verified, representing 100 percent completertess for that
regron.
All 100 the samples from the Cell 3 Beaches region were verified, representing 100 percent
completeness for ìhat region. Ninety-nine of the samples from the Cell 3 Covered Region were
veriñed, representing 99 percent completeness for that region'
Altogether, 399 samples from the total 400 sample locations were verified during this sampling
program, representing 99. 8 percent completeness overall'
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 efhciency factor was used to calculate the total activity of the sample charcoal
containers. lndividual field sample result values presented were not reduced by the results of the freld
blank analyses.
ln practice, radon flux rates were calculated by a database computer program. The algorithms utilized
by the data base program \ryere as follows:
Equation 8.1
where
Equation 8.2:
E'rror,2o =2x
pCi Rn-222 I m'zsec : ¡.r*¡ *UJ*O 5 (d/er.75ì
N : net sample count rate, cpm under 220-662 keV peak
Ts : sample duration, seconds
b : instrument calibration factor, cpm per pCi; values used:
0.1714, for M-01/D-21 and
0.1720, forM-021D-20
d : decay time, elapsed hours between sample mid-time and count mid-time
A : area of the canister, m2
cross Sampl-e, cpm----+Background Sample, cpm
Sample CounE , t, min Background Count, t, min X Sample Concentration
Net, cpm
6
9.2 Site Results
Site Specific Sample Results (reference Figure 2 and Appendix C)
(a) The mean radon flux for each region within the site as fbllows:
Cell2 -Cover Area 3.9 pCi/mz-s (based on270,624 m2 area)
Cell3-CoverArea
- Beach A¡eas
- Standing Liquid
: 5.5 pCi/m2-s (based on 147,25I m2 area)
12.2 pCr/nf -s (based on 66,536 mz area)
0 pCi/m2-s (based on75,071mz 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 for each cell þile) is, as follows:
Cell2: 3.9pCilm2-s
(3.9\Q70.624)
270,624
Cell3: 3.1 pCi/m2-s
(s . s\ (,t 47 .2s t\ + fl 2.2)(.6 6.s3 6) + (0)(.1 s .07 1\
288,858
As shown above, the arithmetic mean iadon flux for the each cell at Denison Mines'V/hite Mesa
milling facility is below the NRC and EPA srandard of 20 pCilrt-s. No condition or unusual event
o""rr.rãd during the measurements that could significantly affect the reported results. Appendix C is
a summary of individual measurement results, including blank sample analysis. Sample locations are
depicted on Figure 2, which is included in Appendix D. The map v/as produced by Tellco-
I
Figure 1
Large Area Activated Charcoal Canisters Diagram
Handle l,/4-in. Venl Hols
TIGURE I Large-Area Radon Coììector
l -in. Thick
Scrubber Pad
I /2-in. Ïhich
Scrubber Pad
1.22. rn. Thick Charc<¡¿l
Support Grid
Re¡ a inor
Spring
10-in. dia
PVC End Cap
10
BALANGE OPERATION DAILY CHECK
Ð l.aus lor-l -o -5, h), t23C 1Balance Model:
Standard Weight (g):zoo. o
ByPost-check (g)o.K. r 0.1%?Pre-check (g)Date
ÐL¿vqpzoo' D 94szoo "obl ¡+l o,6
7oO, O /os20Ö, ov lß loØ
VL¿¿q/.-,/ e,S7oo, o 2Oo. oal¡bloø
CHARCOAL CANISTER ANALYSIS SYSTEM
SITE LOCATION:V.l ¡rì+- M.s¡ n'.\\
CLIENT:Ð _e-nì Soø þ4"ì nz-s (rÀ5 A Cor
Calibration Check Log
System ID:W-oz-"->o Calibration Date: G o Due c¿/
Scaler S/1.{; 5 t s(.'3 High Voltage:6oa window: 4.42 Th¡shld:2.20
Detector S/l.I oALS32-Sowce ID/SN:
(a-z'z-ç,
CrS-.o 4 Source Activity:Sq.3 K p(ì
Blank Canistsr Bkgd, Range, qm: 2 o :t1 i 3o:
Gross Sowce Range, cpm: Z c = | OO37 to IOSZ2 3c:qq D1 to ltObsl
Technician:
All oounts times are one minute.
'11 to tqIgl to
P¡^¿-
faâl-
I rt-
P€ó¡-
Pr¿?osl
YAI: Y: avetage background and source cpm falls within the control limits.
N: average background and source cpm does not fall within the control liinits'
The acceptable ranges were determined from prior background and source check data'
l min. each)Sowce CountsBackgror¡nd Counts (1 min. each)ok?
Y/l\f#3 Average#l #2#3 Avg.#l #2
Date By
J OAO7t (ol .ø<tottoÞ,|-lin q4 tao te-J( st3ilfo ¿lo A"L qsrrL90Å,J-).oz1zl;>lzg fo t oøt.t"fÀ t2i,I
I t?vroR4-R tps+zIoao3.þ1ÍrÐ(t r€)t. løì 7 t/t02-s:+,¿, A,'^
^q
lrTtq t@ã33r Oor llt_ c7+L>OWrllsloÈ Vl.¿'2 OA 02_lo,vt ,1--'^t. ttì( LO tal4Dr"4 t:. lao lsl
-o Yler:--l I I {,t¿o Iú î^,'-lt lo>'t b- tÅv3 rLo r,3g
SITELOCATION
CLIENT D ¿ni ga^
System ID:
Scaler S/l'{;
I.,\-o t /Ð --2-l
r 5-? 2-
Detector SN:4t573
Blank Canister Bkgd' Range' cPm: 2 o =
Gross Source Rango, cPm: 2 o:
CHÀRCOAL CANISTER ANALYSIS SYSTEM
K¿E^ì\
\Al,^¿u5 Co
Calibration Check Loe
Calibration Date:(!
\\o to \ bo 3o=
oØ Due ot)Date:b
4.42 Thrshld: 2'20
Source ActivitY:59,3 þ Cì
1Z
qbqL to to ø3
I
q1 tol
q 8V7 to obA-Z 3oI
Tecbnioian:
All couûts times ate
t
t
t
?ne
grø
F*î
Pr¿
1o+
YßI: Y = average background and source cpmfalls within the conbol limits'
N = average b""kg"ä;;; 'ã*t" tip^ ¿""1i"t fall within the control limits'
Theacceptablerangesweredeterminedftompriorbackgroundandsourcecheckdata.
lIì1ll¡CountsSource
ok?
YTNCounts#2#l v#3 c#2 ,4
By -q1at3,T0o4o_
Date
7r3tt!.- ^?t t47D Il?àl î.,A'^t3t IþtI'r-loo
-
) i^^-,ib r-55to ì I¡ oz-ot b
CHARCOAI CANISTER ANALYSIS SYSTEM
SITE LOCATION r/ t^lu i.{ e:^ þtì \ |
CLIENT:
System ID t'4-o\ / D-z-t
t^5 Lor
Calibration Check Log
calibration oatet ù ( OSf o 6
High Voltage:t t50 window:4.42 Thrshld: 2,20
C,'o Sourae Actlvity:5a. B .y-p(.i
I bo 3 o: a)'1 to l1Z
2o- IOO øo to t osqoJ 3o= 9150 to tÐ1zq
Technicianl
Due Date:b/oÇ/ oØ
P(+
Po+r'
1''€-
Scaler S/l'{-z-
Detector SÂ,J: A 4t533 Source ID/SN:
tlO toBlank Canistcr Bkgd. Range, cPm: 2 o:
Gross Source Range, cPm:
All counts times are one minute.
Y/l.i: Y: average background and source cpm falls within the contol limits.
N : average background and source cpm does not fall within the conüol limits.
'fhe acceptable ranges were determined from prior background and source check data,
Source Counts mrn.Background Counts (1 min. eaqh)
#3 A
ok?
Y/l\I#l #2#3 Avs.
By
#1 #2
Date
lo42-")vVUáa^DTLL i o3ê5b3lt¿ç f |95:'6-t3't ir5vt t+o lo2-5-7lì.t 1*r lozoú l.oz-< 'Ç'r (¿t4-z Lo 3Ð'7)*tî.1 l+,,ße rÞzrl t o33aI:l.o3l tl'tL tB+tl< t ,t<3 vtto t3A I Ð7OAiyozot6,t?Ç -v r? I
¿
rl liøt0 vo?bz v
-
vt 1* ¡'-I oÁr&LOzb7 I o3øq141\'3 t'rao t7ç(t lb'o t 03 ?)7)a&1 I 04"+ø)¿^;-tL'loZteS-re-3 I\G t 2-l6bo
CLIENT:DENIS0N MINES PROJECT: RADON FLUX MEASUREMENTS, WHITE MESA MILL
AIR TEMP MIN: 43'F
1O 8 CHARCOAL BKG:
DATA ENTRY BY: DLC
PROJECT NO.: 08004,00
WEATHER:NO RAINcpm Wt. Out:
TARE WEIGHT:
PILE:3 BATCH:A SURFACE:TAILINGS
AREA: BEACH DEPLOYED: 6 9 8 RETRIEVED: 6
FIELD TECHNICIANS: MG,CS,DLC COUNTED BY: DLC
COUNTING SYSTEM l.D.:M01/D21, M02/D20 CAL. DUE:6/05/09
RECOUNT CANISTER ANALYSIS
144 180.0
29.2
Y
o
GRTÐ
LOCÀTXON
AI¡ÀÈYSIS MTD-TIME
MO DÀ YR HR MIN
cMr
(MIN)
GROSS
COI'NTS
GROSS
TI¡T fN
PRECISION2s % RPD
LLÐ
I. Ð. HR MTN HR MIN
x
/m's
RADOIÍ
410
410
A20
A'20
430
A30
440
440
450
A50
460
460
A70
470
410
410
420
420
440
440
A50
A50
460
A60
A70
470
480
480
.A90
A90
A10 0
A10 0
4
4
I
I
I
I
8
I
9
9
I
8
I
I
8
I
I
I
24
24
49
49
6:-4
615
19
11
35
J5
ÊÀ
54
6L4
6 15
813
88
I 1388
r-911 2
3 819
339?
aotr/
2599
1600
L466
279 .6
21_9 .6
22
22
225 .6
225 .6
223.s
223.5
7
t'7 1
L610 : 22O.2 ' !;0,
5
5
1.1
1.1
0.8
0.8
8.4
8.4
0.2r\t2.0
2.Q
1 2?
1.30
0 ,05
0.Q6
29
11
1
1
10
11
o
1
0.05
0.06
430
A30
^Ê
45
55
55
6148
6 15 I
13
I
47
I2
13 37 1, L46L3 222.9 43.0 4.3 0.05
aa
aa
0.05
0.06
59
trÕ
6t4 I
6158
1, .82
0.s%
0.0?
0.0?
2 .52
1
1
9.0
9.0
a1
a1
959
o È. oJJ
2
2
I
I
9
9
9
9
t4
15
15
L4
L4
6 1,4
615 15
0
0
05
05
922922 920
9 2.A
6
6
480
480
o
9
9
9
9
9
a1
34
34
1
1
9
9
9
9
9
9
31
31
5L4
615
8
I
I
8
4.0
?o
0.4
^L
38 2 ,, 1i301 ,'225.,7 ,,i1.5 Q¡?' 0.05rà ,2,; , 1206t:. 225,.7 : r.ä :: ö,:är; i, ö,:oe
1,469
]-288
4569
3936
A90
490
A10 0
410 0
36 6 L4 8
36 6' L5 I
4t
41,
4t
4L
6]-4615
53
10
13
13
3
0
0.05
0.06 2.3"<
ÀVERAGE PERCENT PRECIS]ON FOR TIIE CELL 3 BEÀCHES REGION: 2.02
Page 1 of 1
I
CLIENT: DENISON MINES PROJECT: RADON FLUX MEASUREMENTS, WHITE MESA MILL
9
9
AIR TEMP MIN: 39'F
12 8 CHARCOAL BKG:
DATA ENTRY BY: DLC
.r .1,8
PROJECT N0.: 08004.00
WEATHER:NO RAINcpm Wt,Out:
TARE WEIGHT:
PILE: 3 BATCH: C SURFACE: SOIL
AREA: COVER DEPLOYED: 6 11 I RETRIEVED: 6
FIELD TECHNICIANS: MG, CS, DLC COUNTED BY: DLC
COUNTING SYSTEM l.D.; M01/D21, M02/D20 CAL. DUE: 6/05/09
RECOUNT CAN ISTER ANALYSIS
c10
RECOUNT
c20
RECOUNT
c30
RECOUNT
c40
RECOUNT
c50
RECOI]NT
c60
RECOUNT
c70
RECOUNT
c80
RECOUNT
c90
RECOUNT
c10 0
RECOUNT
c10
c10
c20
c20
c3
C
c40
c40
c50
c50
c60
c60
c70
c70
c90
c90
c10 0
c10 0
2021,
184 0
1309
12 01
I42I7
L2468
147
225 .4
21,8 .6
2L8 .6
180.C
29.2
0 .01
0.0s
4.32
8.0?
0.0%
9.sz
0.0?
5 .42
0
0
15
15
L5
L5
14 34 L4
L4 34 14
t)
6
6 15 .8 'L6
616 B 9
615816
6L6 B 9
6 15 I
6 ,16 ð
27
27
15
15
35
35
15
l_5
61s86t68 1
1
4.5
4.7
I.2
1.3
,, ,'1,:1:' 1,',.0
1.8
1.8
9.6
9.6
0.5
0.5
0.1
0.1
0.1
0.1
0
0
04
05
04
05
0
03
32 ,63¿. u
1-5 8 1s t7 3 128'8" )22,.'t ,0:!9 '' 0.1. o.04
L4
t4
4t
4I
1,4
L4
3t
3t
6 15 I
6L68
15 )
I4
T4
46
46
L4
L4
42
42
6158
6168
L4 52
1A tr'
1-4
14
51
51
5 15
6l-6
1_6
3 i , L:4:7A, 2t-31 5
3 1352 213.5
'0
U.
3
3
8
I
34
?o
L4
1,4
113 1
r041
1,7'72 2L
1564 2r
2L4 .5
)14 <
5 , 22\ :,!: ,
B . :222,,.4.
0.56
0.56
34-6
34.1
3 -46
3 ,41,
0-04
0,05
0
0
L4
t4
57
57
56
56
c80
c80
15
15
15
15
15
15
l_5
15
10
10
15
15
1-1
r'7
15
15
15
15
6 15 I6]-6 I
0.04
0.05
4788 216 .7 ,r 11..4:: , . I. 1 0:.04
4022 2L6'.t.7 1.: :,. :: ' l0 I.r. :,. ': ," 1'.,. 1-, 0 , 05
0
5
5
3
3
9
9
49 0.2
0.22
T7
9
2.5
22
2r6
216
9
9 1.5år
AVERAGE PERCENT PRECISION FOR THE CELL 3 COVERED REGION: 3.22
I . D, iIR MIN HR MIN MO DA YR
MTD-TIME
HR MIN
CNT
(MIN)
GROSS
COT'NTS
GROSS
WT IN
PRECIS'ON
% RPDs
SÀMPLE RADON +RElRIV
/m'çTOCATION
TJTJD
Page 1 of 1
CLIENT:DENISON MINES PROJECT: RADON FLUX MEASUREMENTS, WHITE MESA MILL
PILE: 3 BATCH:A SURFACE:TAILINGS
AREA: BEACH DEPLO'/ED: 6 I I RETRIEVED: 6
FIELD TECHNICIANS: MG,CS,DLC COUNTED BY: DLC
COUNTING SYSTEM l.D.:M01/D21, M02tD20 CAL. DUE:6/05/09
AIR TEMP MIN: 43"F
10 8 CHARCOAL BKG:
DATA ENTRY BY: DLC
144
PROJECT NO.: 08004.00
WEATHER:NO RAINcpm Wt, Out:
TARE WEIGHT:
180,0
29.2
s
g
GRIÐ
IJOCATION
CNT
(MTN)
GROSS
COT'NTS
DEPLOY RETRIV ANALYSTS MID-TTME
HR MIN HR MIN MO DA YR HR MIN
GROSS
WT IN /m's pCí/mzs pCi/m2s COMMENTS:
SÀlrfgIJE
I Ð
RADON +
435
A36
437
-4.3 I
439
.A'40
A4L
A42
443
444
445
A46
A47
Ä'48
A49
450
451
.A'52
^tr?
454
.A55
456
457
^q,a459
A60
A6l_
462
463
¡.64
A65
A66
467
A6B
Ä35
A36
.A37
438
a-ìq
A'40
441
A42
Ä.43
444
445
A46
¡,41
A4 i3
Ä'49
A5Ð
A51
A'52
.A'53
A54
455
A55
457
453
A'59
A6 l
A61
A62
463
A6+
A65
A65
A61
A63
2841
5008
6262
1585
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Page 2 of 3
,05
.05
.05
CLIENT:DENISON MINES PROJECT: RADON FLUX MEASUREMENTS, WHITE MESA MILL
PILE:2 BATCH:B SURFACE:SOIL
AREA: COVER DEPLOYED; 6 10 8 RETRIEVED: 6
FIELD TECHNICIANS: MG,CS DLC COUNTED BY: DLC
COUNTINGSYSTEMI.D.:M0'/D21,lül02lD20 CAL.DUE:6/05/09
AIR TEMP MIN: 51'F
11 8 CHARCOAL BKG
DATA ENTRY BY: DLC
PROJECT NO.: 08004.00
WEATHER:NO RAINcpm Wt. Out:
TARE WEIGHT:
:'1'l!i'''::''i''']',:i::' .. .0 ; 4,.' -.
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1
GRID
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GROSS
COI]NTS
GROSS
WT I¡T ?s
SAMPLE !
I D
RADON
/m's
IrLD
/m2 s
Page 1 of 3
CLIENT: DENISON MINES PROJECT: RADON FLUX MEASUREMENTS, WHITE MESA MILL
AIR TEMP MIN: 39'F
12 8 CHARCOAL BKG:
DATA ENTRY BY: DLC
PROJECT N0.: 08004.00
WEATHER:NO RAINcpm Wt. Out:
TARE WEIGHT:
PILE: 3 BATCH: C SURFACE: SO|L
AREA: COVER DEPLOYED: 6 11 8 RETRIEVED: 6
FIELD TECHNICIANS: MG, CS, DLC COUNTED BY: DLC
COUNTING SYSTEM LD.:M0'/D21, M02/D20 CAL. DUE:6/05/09
147 180,0
2A)s
0
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15 SPILLED
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0
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8.0
Page 2 of 3
CLIENT: DENISON MINES PROJECT: RADON FLUX MEASUREMENTS, WHITE MESA MILL
PILE:2 BATCH: B SURFACE: SOIL
AREA: COVER DEPLOYED: 6 10 I RETRIEVED: 6
FIELD TECHNICIANS: MG,CS DLC COUNTED BY: DLC
COUNTING SYSTEM l.D.:M0'/D21, M02/D20 CAL. DUE:6/05/09
AIR TEMP MIN: 51"F
11 8 CHARCOAL BKG:
DATA ENTRY BY: DLC
BLANK CANISTER ANALYSIS:
144
PROJECT NO.: 08004.00
WEATHER:NO RAINcpm Wt. Out:
TARE WEIGHT:
180.0
29.2
s
s
B BLANK 1
B BI,ANK 2
B BLANK 3
B BLANK 4
B BI,A}IK 1
B BT,ANK 2
B BLA}TK 3
B BLAUK 4
11
11
1l-
11
11
l_1
11
11
35 6
:35 635 635 6
'i4 BL48
748
15
15
0
0
0
0
0
t4 colfTRoL
CO}üTROL
CONTROL
CONTROL
CON.TROfJ
532 10 1540 210 .5 0 . 0243 l_0 1570 2Lr.0 0.03
0.03
0.03
BBLANK5 BBLAI{K5 ]-1
GRID
LOCÀTION
SAT{PLE
t. D-
RETRIV A¡¡Â,TJYSTS MIÐ-TIME
HR ¡IIN IIR MIN MO DA YR HR MIN
CIET
(MIN)
GROSS
COUNTS
GROSS
WÎ IN
l,ΡDRADON
/m" s
ü
/m's
¡-VERAGE BLÀ¡IK CÀNISTER Àì¡ÀLYSIS FOR THE CELL 2 COVERED REGION: 0.03 /m's
Page 1 of 1
Appendix D
Sample Locations Map (Figure 2)
D