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41JieSWee95 0026 ALBANEL010
REPORT ON AN AIRBORNE GEOPHYSICAL SURVEY ELLIOT LAKE (MACE LAKE) AREA. ONTARIO. CANADA
RADIOMETRIC SURVEY23
ATLANTIC RICHFIELD CANADA LTD
r :
Jack C. Zahn Mining Geophysicist
October 1969. ASSESSMENT W ORK
gjgg^y^:'
MM ALBANEL010C
TABLE OF CONTENTS
INTRODUCTIONPage
MAPSMap //l Time MapMap #2 Bismuth 214Map #3 rhalium 208Map /M Potassium 40Map //5 Gross Count Map
AUTHOR'S QUALIFICATIONS ...
APPENDIX A
RADIOLOGICAL SUBSYSTEMS
MAGNETIC "
NAVIGATION "
RECORDING "
ELECTROMAGNETIC "
(In Folder)
Page 5
6
7
8' 9
10
(i) ("" '--.
.2-: --'
February 17, 1970
REPORT ON AN AIRBORNE GEOPHYSICAL SURVEY ELLIOT LAKE (MACE LAKE) AREA, ONTARIO, CANADA
ATLANTIC RICHFIELD CANADA LTD.
INTRODUCTION:
Between October 28 and October 30, 1969, an airborne geophysical
survey was conducted in the Elliot Lake (Mace Lake) Area, Ontario, by
Atlantic Richfield Canada Ltd.
Of the 700 line miles flown, 600 miles cover the actual claim
blocks in this report. The claims covered by this survey are located
In Townships 162, 163, 168 and 169, District of Algoma, Sault Ste.
Marie Mining Division, Ontario, Canada. The area is shown on Map l
which includes the complete outline of all the claim blocks.
The airborne survey was conducted for the purpose of mapping the
distribution of radioactive material in the area and distinguishing
between uranium, thorium, anil potassium sources. The geophysical
instruments used were supplied by EG&G, International, Boulder, Colorado,
and are outlined in Appendix A. The aircraft used to conduct the survey
was a Turbo-Beaver owned and operated by Atlantic Richfield Canada Ltd.
The airborne geophysical survey lines were flown in a north- south
and east-west direction with a line spacing no greater than one quarter
of a mile. The navigation and flight path recovery were accomplished
through the use of doppler radar navigation instruments. This equipment
is outlined in Appendix A. The survey was flown at an altitude of 400'-
and, at an average air speed of 100 miles per hour.
MAPS; '^ SSM-1407Flight Line Map (Time Map)
The locations of the flight lines are shown on the time map. The
scale of this map is l' s 1,320'. The survey was flown in two directions
REPORT ON AN AIRBORNE GEOPHYSICAL SURVEY ELLIOT LAKE (MACE LAKE) AREA, ONTARIO, CANADA
ATLANTIC RICHFIELD CANADA LTD.
INTRODUCTION:
Between October 28 and October 30, 1969, an airborne geophysical
survey was conducted in the Elliot Lake (Mace Lake) Area, Ontario, by
Atlantic Richfield Canada Ltd.
Of the 700 line miles flown, 600 miles cover the actual claim
blocks in this report. The claims covered by this survey are located in
Townships 162, 163, 168 and 169, District of Algoma, Sault Ste. Marie
Mining Division, Ontario, Canada. The area is shown on the maps that
accompany the report and includes the complete outline of all the claim
blocks.
The portion of the airborne survey covered by this report was
conducted for the purpose of mapping the local magnetic and the very' low
frequency (VLF) anomalies. The VLF receiver used was supplied by
McPhar Geophysics Limited, Don Mills, Ontario and is outlined in
Appendix A. The magnetometer used was supplied by EG&G, International,
Boulder, Colorado, and is outlined in Appendix A. The aircraft used to
conduct the survey was a Turbo-Beaver owned and operated by Atlantic
Richfield Canada Ltd.
The airborne geophysical survey lines were flown in a north-south
and east-west direction with a line spacing no greater than one quarter
of a mile. The navigation and flight path recovery were accomplished
through the use of doppler radar navigation instruments. This equipment
is outlined in Appendix A. The survey was flown at an altitude of 400'i
and at an average air speed of 100 miles per hour.
SSM- 1407
-2-
Data Reduction
The VLF data were displayed using a profile format. The profiles
were examined and the VLF anomalies were recorded on the map as small
dots. VLF anomalies that were coincident with magnetic anomalies were
mapped as large dots. VLF anomalies are indicative of a relative increase
in the conductance of the near-surface rocks. The coincidence of magnetic
and VLF anomalies may be indicative of base metal mineralization.
The magnetic data is contoured by computer programming. The Earth's
normal field is removed from the total intensity profiles as recorded in
the field. These resultant data (in line form) are tied by a minimization
technique to provide a smooth, continuous surface that describes the local
magnetic field. This is t3 - In two basic steps, (1) vertical datum
shifts (systematic errors) are determined to minimize mis-ties at all line
intersections, (2) the remaining mis-ties (random errors) are then removed
by being distributed between intersections along the data lines. During
this adjustment process, certain of the data lines may be completely
removed if these lines fail to meet statistical requirements based on the
variance of the mis-ties of the individual lines.
The adjusted set of magnetic profiles is now ready for gridding prior
to contouring. This gridding is accomplished by a proprietary line-oriented
gridding program. The basic requirement is that the survey be flown with
flight lines approximately parallel and more or le"s evenly spaced. The
grid mesh is usually taken as the average line spacing but may be set at
any fixed value. The gridded output is then contoured at an appropriate
contour interval.
i ', M "V tL -:t V' i
-3-
Aeromagnetic Map
The scale of this map is l" = 1 ,320 feet at. l the contour interval is
10 gammas.
There are four major linear features exhibited on this map. The
First lies south of Lease Area 0-41 and Lease Area 0-42 and trends in
a west-northwest direction. This feature is the magnetic expression of a
fault and/or a diabase dike. The second linear feature is oriented east-
northeast and extends through Lease Area 0-35 north of Lease Area 0-36
and intersects the northwest corner of Lease Area 0-32. This is the
magnetic expression of a portion of the Nipissing Diabase. The third
linear feature is situated across the northwest corner of this map. It
extends from Claim Block 103403 through Claim Block 103414, Lease Area
0-44, and through the contoured magnetic maximum located in the vicinity
of the word ( "Township 169." This magnetic maximum trend is the expression
of the fault chat parallels the Little White River. The fourth and
final linear maximum trend located in this area extends through the
feature located in Claim Block 80784 and Claim Block 80798 on the Cominco
Area, Township 162; thence northwest through the maximum at Claim Block
95125, Lease Area 047, thence through the maximum south of Claim Block
84000, Lease Area 0-36, Township 168, thence in a northeastern direction
through the magnetic maximum located in Cluim Blocks 84064 and 84054,
Lease Area 0-32. This feature appears to be associated with the
syncline that trends northwest-southeast across the northeast portion of
this map. It is probably a mineralized faulted zone lieing close to the
surface.
VLF Anomaly Map
The scale of this map is l" = 1,320 feet. The small dots indicate
SSM-1407
-4-
VLF anomalies and the large dots indicate VLF anomalies with aeromagnetic
anomalies coincidences.
The only group of VLF anomalies of any interest are located in Lease
Area 0-47, Township 162. These anomalies appear to be associated with
the magnetic anomaly that is structurally controlled by the local syncline.
The remaining anomalies indicated on this map have no relationship to any
major magnetic trend.
Jack C. Zahn, Mining Geophysicist
SSM-1407' l
-5-
Author's Qualifications - Jack C. Zahn
Graduated with a B.S. in Geology in 1961 and a M.S. in Geology with
a specialty in geophysics in 1965. Both degrees from the Ohio State
University, Columbus, Ohio.
Employed as a consultant geophysicist from 1962-1965 with
George H. Mayhew Si Associates, Powell, Ohio. Projects worked on during
this period were in the fields of highway design geophysics; engineering
design geophysics, both bridge and dam site, and hydrology. Operations
were conducted in the midwest and the province of Ontario, Canada.
From 1963-1965 employed by the Ohio State Engineering Experiment
Station, Ohio State University,and conducted research with and the
evaluation of geophysical tools and techniques to fee used to solve
engineering problems.
From 1965 to the present, employed as a geophysicist by the Atlantic
Richfield Company, From October, 1968 to the present, being employed in
the field of uranium exploration and airborne geophysical techniques.
Jack C. Zahn Mining Geophysicist
-6-
MAGNETIC SUBSYSTEM
The Varian type V-4937A Transportable Magnetometer is operated* - *
in a fixed mode (stinger installation). The magnetometer read out
is directly in gamma in the range of 20, 000 to 100, 000. The slow
mode read out of l second is employed, giving l gamma sensitivity.
A nominal 28V DC power is obtained by operating directly of f the
aircraft battery.
-7-
ELECTROMAGNETIC SUBSYSTEM
The McPhar airborne KEM system using VLF transmission from Cutler,
Maine, 17.8 KHa, as the primary field was operated aboard the Beaver
airdraft. In the absence of conductors, the electromagnetic field is
horizontal and constant in amplitude. A conductor will distort the
horizontal field and often change the amplitude of the received signal.
The KEM system continuously measures the dip of the resultant field in
degrees and may be regarded as a vertical loop system with the trans
mitter located at infinity.
j^* *xv t -- -
-8-
RECORDING SUBSYSTEM
Data are recorded in a digited and analog mode. The principal recorder
is a 7 track Digi-Data Model 1420. The input rate is 0-200 characters
per second. The packing density is 200BPI. The power required is
110V 60cps. A Non-Linear Systems Model 2710 Tape Verifier produces
one full data word every minute to verify the recorded data. Data from
all systems are recorded on a one second basis.
The analog recording system provides a visual display of altitude, mag
netic field, count rate of three isotopes, and gross radiation. These
data are recorded on a six track MFE Strip Chart Recorder that operates
on 110V at 60cps.
-9-
NAVIGATIONAL SUBSYSTEM
The navigational system consists of a GPL Division GPK - 1000
Doppler Navigation Radar Set, Kearfott Gyro Guide Compass System,
Honeywell Electronics Altimeter Set Y G 9000D, and an Automax G 2
camera for a backup system.
GPK - 1000 Doppler Radar Set
Operational Limits
Altitude - from 40 Ft. to 50, 000 Ft. over land or water with
sea state greater than Beaufort 1.
Groundspeed - 80 - 800 knots.
Drift Angle - o0 - 40" right or left.
Temperature - operational from -540 C to 710 C.
Pitch Attitude - 25" nose up or down.
Accuracies (50*fc probability)
Groundspeed - 0. IV/o 4- 0. 35 knots.
Drift Angle - 0.170
Power requirements are 115V at 400cps and 28 V DC.
Kearfott Gyro Guide Compass System
The error of the output signal with reference to gyro heading is
less than l0 . The error of the output signal with reference to
compass transmitter reading when compensated is also less than l0 .
Honeywell Electronic Altimeter Set YG 9000D
This system has an altitude accuracy of * 5ft. * Sfo of actual
altitude. The power requirements are 115V at 400cps and 28V DC
Automax G 2 Camera
This 35 mm airborne camera is used as a back up for the Doppler Radar
Set. In normal operations the camera is triggered on a frame every- ' f :~ - . . '
two seconds basis. Power requirements are 115V at 60cps and 28V DC.
-2-
with flight lines oriented north-south and east-west.
Radiometric Maps
General
All of the contoured radiometric maps have been produced by computer
programming. In order to facilitate 'the contouring program, the data
were subjected to smoothing filters. The weighted formula for this
operation on the Bi2i4 and K/io Maps is:
.2Z + .4Z +.7Z + Z + .7Z + .4Z +.2Z zi z i-3 i-2 i-1 i i+1 i+2 i+3
i+2 (.7* 4-f 2)
The weighted formula for this operation on the T1208 and Gross Count map is:
Zi = . 4Z i -
The lowest contour lines have been deleted from each of the radio
metric maps. Thus, the features contoured represent only those anomalies
that arc of a high grade.
The radiometric data have been corrected for background radiation,
Compton Effect and altitude deviation. These operations were performed
on the data at the computer.
Map # 2 Bismuth 214
The scale of this map is l" ^ 1 ,320'. The contour interval is 2 cps
with the lowest contour line at 8 cps.
There are two prime anomalies on this map. The largest is located
on Claim Block 84232, Lease 0-36, Township 168. The second anomaly is
located north of Claim Block 103414, Lease 0-44, Township 169. This
latter anomaly is located along an anomalous trend that is oriented
northeast-southwest and extends across the northwest corner of this map.
14: O -^
-3-
There arc other scattered anomalous areas in Leases 0-29, 0-47, 0-28, in
Township 162.
Map #3 Thallum 208
The scale of this map is l" ^ 1 ,320'. The contour interval is l cps
and the lowest contour line has a value of 4 cps.
There are three major anomalous areas on the Thaliunt Map. The first
and most important lies along a northeast- southwest trending anomalous area
located in the northwest part of the map. This is the same feature that
was seen on the Bismuth Map. The maximum anomalous highs are located
in Claim Blocks 103414, 103413, east of 103406, in Lease 0-44, Township
169, and southwest of Claim Block 10744, Lease 0-41, Township 168.
The second anomalous area is located in Claim Block 84232, Lease
0-36, Township 168. The third anomalous area is located in Claim Block
98838, Lease 0-28, Township 162.
There is a low grade anomaly that trends cast-west through Leases
0-48, 0-31 and 0-29 of Township 162.
Map #4 Potassium 40
The Potassium Map shows four anomalous areas. The major anomalous
trend is located through Leases 0-48, 0-31, and 0-29 of Township 162.
This trend .that is oriented in an east-west direction, is also represented
by an anomaly positioned north of Claim Block 103824, Lease 0-45,
Township 162. This latter anomaly is actually in the southwest corner
of Township 163. The second anomalous area is located across Lease 0-28,
Township 162 and appears to be oriented in a northeast-southwest direction.
.'' ''' ' ' ' ' ' ' '' '""'''' :'"': ' " ' ' "' "•'•'^''•'•' i'*' J-'- ' *~*''
-4-
The third anomalous area is locate*' in the vicinity of Claim Blocks 80784
and 80785 of the Cominco Lease, Township 162.
The last anomalous trend is oriented northeast-southwest and lies
across the northwest corner of this map in Townships'169 and 168.
Map #5Gross Count Map
The scale of this map is l" = 1,320'. The contour interval is
200 cps and the lowest contour line has a value of 2,200 cps.
There are five gross anomaly trends located on this map. The
longest trend is located in the northwest section of the map, is oriented
northeast-southwest and passes through Townships 168 and 169. This is
the same trend that was seen on the Bismuth and Thalium Maps. The
largest anomalies are located in Claim Blocks 103414, 103413, and
103406, Lease 0-44, Township 169; Claim Block 103426, Lease 0-43,
Township 169; and Claim Block 91714, Lease 0-35, Township 168. The
second and steepest is located in Claim Block.84232, Lease 0-36, Township
168. This anomaly was noted previously on the Bismuth and Thalium
Maps. The third anomalous area is located in Claim Block 34000, Lease
0-36, Township 168. The fourth anomalous area on the Gross Count Map
is located on a trend from Claim Block 98839, Lease 0-28 through Claim
Block 96099, Lease 0-46, Township 162. The last anomalous area is
located through and around the Cominco Lease area in Township 162.
It appears that the anomalies located along the northwest section
of the map and in the vicinity of Claim Block 84232, Lease u-36,
Township 108 warrant a geophysical or^a geological ground survey.
Jack C7 Zann, Mining Geophysicist
- 5 -
Author's Qualifications - Jack C. Zahn
Graduated with a B. S. in Geology in 1961 and a U.S. in Geology with
a specialty in geophysics in 19G5. Both degrees from the Ohio State
University, Columbus, Ohio.
* Employed as a consultant geophysicist from 1962-1965 with
George H. Mayhew fc Associates, Powell, Ohio. Projects worked on during
this period were in the fields of highway design geophysics; engineering
design geophysics, both bridge and dam site, and hydrology. Operations
were conducted in the midwest -and the province of Ontario, Canada.
From 19G3-1965 employed by the Ohio State Engineering Experiment
Station, Ohio State University,and conducted research with and the
evaluation of geophysical tools and techniques to be used to solve
engineering problems.
From 1965 to the present, employed as a geophysicist by the Atlantic
Richfield Company. From October, 1968 to the present, being employed in
the field of uranium exploration and airborne geophysical techniques.
Jack C. Zahn Mining Geophysicist
SSM-1407
- 6 - -
RADIOLOGICAL SUBSYSTEMS
The radiological subsystem is made up of two component parts; the
detectors and the analyzers.
Detectors
The detector package is made up of two arrays of seven crystals each.
The detectors are supplied by Harshaw Chemi cal Company, and con-t
sist of a 4" diameter x 4" thick thallium activated sodium iodide crystal
hermetically sealed in an aluminum container and optically coupled to a
3" RCA photomultiplier tube with a low background tube base assembly.
The detectors have a resolution of 8. 57o with Cesium 137.
Analyzers
Technical Instruments, Inc. Model 404C Pulse Height Analyzer
The Model 404C has 400 Channels with a maximum input rate up to
50, 000 cps with negligible spectrum distorsion. The spectrum rangeg is 3MeV. The memory capacity is 10-1 counts per channel.
Power requirements are 115V at BOcps.
EG&.G Four Channel Pulse Height Analyzer
The windows in this analyzer are set to record:
Gross Radiation (lOOKeV to 3. OMeV)
K40 (1. 37MeV - 1. SOMeV)
Bi214 (1. 65MeV - 1. 88MeV)
Tl208 (2. SOMeV - 2. 74MeV)
The data processor counts the pulses in each of these windows and this
information is read out each second.
Power required is 15V and 19V DC.
- 7 -
MAGNETIC SUBSYSTEM
The Varian type V-4937A Transportable Magnetometer is operated
in a fixed mode (stinger installation). The magnetometer read out
is directly in gamma in the range of 20, 000 to 100, 000. The slow
mode read out of l second is employed, giving l gamma sensitivity.
A nominal 28V DC power is obtained by operating directly off thet
aircraft battery.
- 8 - -
NAVIGATIONAL SUBSYSTEM
The navigational system consists of a GPL Division GPK - 1000
Doppler Navigation Radar Set, Kearfott Gyro Guide Compass System,
Honeywell Electronics Altimeter Set Y G 9000D, and an Automax G 2
camera for a backup system.
GPK - 1000 Doppler Radar Set .
Operational Limits
Altitude - from 40 Ft. to 50, 000 Ft. over land or water with
sea state greater than Beaufort 1.
Groundspeed - 80 - 800 knots.
Drift Angle - o0 - 400 right or left.
Temperature - operational from -540C to 710 C.
Pitch Attitude - 25C nose up or down. *
Accuracies (50*7o probability)
Groundspeed - 0.177o -i- 0. 35 knots.
Drift Angle - 0.170
Power requirements are 115V at 400cps and 28 V DC.
Kearfott Gyro Guide Compass Sy?* .n
The error of the output signal with reference to gyro heading is
less than l0 . The error of the output signal with reference to
compass transmitter reading when compensated is also less than l0.
Honejwell Electronic Altimeter Set YG 9000D
This system has an ?,ltitude accuracy of ^ 5ft. -*- 3fo of actual
altitude. The power requirements are 115V at 400cps and 28V DC
Automax G 2 Camera
This 35 mm airborne camera is used as a back up for tlie Doppler Radar
Set. In normal operations the camera is triggered on a frame every
two seconds basis. Power requirements are 115V at GOcps and 28V DC.
- 9 -
RECORDING SUBSYSTEM
Data are recorded in a digited and analog mode. The principal recorder* . .
is a 7 track Digi-Data Model 1420. The input rate is 0-200 characters
per second. The packing density is 200BPI. The power required is
110V GOcps. A Non-Linear Systems Model 2710 Tape Verifier produces
cue full data word every minute to verify the recorded data. Data fromt
all systems are recorded on a one second basis.
The analog recording system provides a visual display of altitude, mag
netic field, count rate of three isotopes, and gross radiation. These
data are recorded on a six track MFE Strip Chart Recorder that operates
on 110V at GOcps.
•t-#-:\.' . -'.v"'"V;-7, , - ."' ',:?'--
- 10 - :."' : v;;x^-v! : , ,- ' -. ' . " -
ELECTROMAGNETIC SUBSYSTEM
The McPhar airborne KEM system using VLF transmission from Cutler,
Maine, 17.8 KHa, as the primary field was operated aboard the Beaver
aircraft. In the absence of conductors, the electromagnetic field is
horizontal and constant in amplitude. A conductor will distort thel ,
horizontal field and often change the amplitude of the received signal.
The KEM system continuously measures the dip of the resultant field in
degrees and may be regarded as a vertical loop system with the trans
mitter located at infinity.
""' :^''^"^'"v^'"" : ' ' :"" ; - "- ' " '••'~'*.'-'~?f'-i? ^Kf^f^~ .'s;r-?:JW;. ! :.;-..-.-V' •.^"-.•^"sfK^:
AtlanticRichfieldCanadaLtd. Uranium Exploration and Development Suite 1410 Prudential Building 4 King, Street West Toronto l, Ontario, Canada Telephone 416 363 3228
R. D. Rsmsey District Geologist
June 23, 1970.
Mr. F. Matthews Special Projects Department of Mines Parliament Buildings Toronto, Ontario.
Dear Sir: ••86 ALBAHEL900
Enclosed please find two copies each of a geophysical report covering airborne radiometric survey, airborne magnetometer and EM surveys on 226 claims (listed on the attached shnnt) in Townships 162, 168 6 169, Sault Ste. Marie, Ontario, together with a shest giving the geophysical airborne survey costs.
Report of Work forms were submitted to Mr. D. A. Jodouin, Mining Recorder, Sault Ste. Marie and acknowledgement of the filing of this work was received by way of Mr. Jodouin's letters of June 4th and June 15th 1970.
D. S. McPheeActing District Geologist
Enclosure
SEP 28 1970
RESIDENT GEOLOGISTSAULT STE. MARIE
SSM-
p F1111
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GEOPHYSICAL AIRBORNE SURVEY COSTS
Project Name Elliot Lake (Mace Lake) -Project Code 006Flight Dates 28 Oct - ?0 Oct 69Total Flight Line Miles 700Total Flight Line Miles in Government Claim Area 600
Contract equipment rental: 3 .days @ 3 655-74 /day ***
Contract flight line recovery ' 7oo miles @ S 200 /wile s
S 1,967.22
1,400.00
Contract programmer time:
Contract computer time:
Contract plotter time: ^
2. s days @ S 150.00 /day a
Contract systems operator expense:
Aircraft rental: ____ig hours,
40 hours 6 3 125.00 /hour
4^0 hours @ 3 50.00___/hour
______ days @ 3^^ /day
35 minutes @ S /hour
ARCo programmer time:
ARCo computer time:
ARCo drafting time:
7.5 days Q 3 50
3___ hours, ^^
/day *
58 minutes 150.00/hour
____3 days @ .^^—.———
ARCo photo reproduction ~ 75.00
ARCo geophysical evaluation: ___ 2__ days @ S 52.00 /day s
ARCo plotter: ____8
Reproduction costs:
Mobilization charges:
hours @ S 25.00 /hour s
Mobilization charges, Canada:
VLF rental: 3
7 % of $19,408.97
days @ S71.42______/day
Mosaics/maps
375.00
500.00
200-OO
160.97
1.672.50
375.00
595.00
75.00
75. OO
1M .OP
200.00
1.358.63
214.26
C ;Total Cost
Cost/Mile *
SSM-.I407
9.272.58
S 13.25
. /~'--.- ^.:- ",S^.".^xt::^*-y;;i:.a?J :Hy'. : ' vi;'- r*-'.'.\. : :-^,*^l5--^s^'ijife"iv..-'v,-i ..-. ;i-v
MACE LAKE PROSPECT. ONTARIO 226 CLAIMS
CLAIM NO
SSM 83994 - 84003 inclusive
SSM 84022 -39 "SSM 84045 - 75SSM 84215.- 32 "
SSM 88806 - 08 "
SSM 01706 - 21 "
SSM 91974
" "
" "
"
SSM 92428 - 29 SSM 92476 - 77
SSM 94226 - 27SSM 94229SSM 94728 - 30
SSM 95109 - 10 SSM 95124 - 25 SSM 95170 - 71 SSM 95172
SSM 96005 SSM 96009 - 10 SSM 96095 - 96 SSM 96159
SSM 97843
SSM 98154 SSM 98159 SSM 98682 SSM 98814 - 24 SSM 98832 - 55
SSM 99018 - 25 SSM 9 9078 - 89
SSM 101744 - 45
SSM 103393 - 103430 " SSM 103824 - 30 "
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