SWRHL-21r
    FINAL REPORT OF  OFF-SITE  SURVEILLANCE
                  for  the
       DRILL EVENT of December  5,  1964
                    by  the
  Southwestern Radiological  Health  Laboratory
          U.  S.  Public  Health  Service
 Department of Health,  Education, and Welfare
               Las  Vegas, Nevada
                                    -U  MtE.
               October  18,  1965
This surveillance  performed  under  a  Memorandum
       of Understanding  (No.  SF  54 373)
                   for the
        U. S.  ATOMIC  ENERGY  COMMISSION

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     FINAL REPORT OF OFF-SITE SURVEILLANCE
                    FOR THE
        DRILL EVENT OF DECEMBER 5,  1964
                    by the
  Southwestern Radiological  Health Laboratory
          U.  S. Public Health Service
 Department of Health, Education,  and Welfare
               Las Vegas,  Nevada
               October 18,  1965
    Copy No. 25

    Southwestern Radiological  Health Laboratory
        Las Vegas,  Nevada
This surveillance performed under a Memorandum
       of Understanding (No.  SF 54 373)
                    for the
        U. S.  ATOMIC ENERGY COMMISSION

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                                 ABSTRACT

  The Drill Event was an underground nuclear detonation conducted by the
  U. S. Atomic Energy Commission at the Nevada Test Site on December 5,
  1964.  The detonation released radioactivity to the atmosphere and the
,  resulting effluent cloud traveled southwest from the Nevada Test Site,
'.jpa's'sing over Lathrop Wells, Nevada and Shoshone, California.  The U.  S.
  Public Health Service provided radiological surveillance in the off-site
  area in accordance with a Memorandum of Understanding with the Atomic
  Energy Commission.  Analysis of the data collected indicates that the
  radiological safety criteria for the general population, as established
  by the Atomic Energy Commission, were not exceeded as a result of this
  event.

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                           TABLE OF CONTENTS

ABSTRACT     .                                                    i
TABLE OF CONTENTS                                               i i
LIST OF TABLES AND FIGURES                                     iii
I.   INTRODUCTION                                                 1
II. OPERATIONAL PROCEDURES                                       2
    A.  RADIATION MONITORING                                     2
        1.  Monitoring Teams                                     2
        2.  Dose Rate Recorders                                  2
        3.  Aerial Cloud Tracking                                2
    B.  DOSIMETRY                                                3
    C.  ENVIRONMENTAL SAMPLING                                   3
        1.  Air                                                  3
        2.  Milk Samples                                         4
        3.  Water Samples                                        5
        4.  Vegetation Samples                                   5
I  I I.RESULTS                                                      6
    A.  RADIATION MONITORING                                     6
        1.  Ground Monitoring                                    6
        2.  Dose Rate Recorders                                  7
        3.  Aerial Cloud Tracking                                7
    B.  DOSIMETRY  .                                         -7
    C.  ENVIRONMENTAL SAMPLING                                   7
        1.  Air                                                  7
        2.  Mi Ik                                                 1
        3.  Water                                                8
        4.  Vegetat ion                                           8
IV. CONCLUSIONS                                                 '0
APPENDICES
D ISTRIBUTION
                                  i i

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                            LIST OF TABLES
Table 1.  Summary of dose rates observed by monitoring teams,
          December 5, 1964.

Table 2.  Positive air sample results.

Table 3.  Results of vegetation samples  containing fresh
          f i ss ion products.
                            LIST OF FIGURES


Figure 1.  Air sampler and dose rate recorder  locations.          11

Figure 2.  Milk and water sampling locations.                     12
                                  i i i

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                           I.  INTRODUCTION

The Drill Event was an underground nuclear test conducted by the
Lawrence Radiation Laboratory at the Nevada Test Site as a part of
Operation Whetstone.  The event took place on December 5, 1964 and
resulted in a release of radioactive material into the atmosphere.

In accordance with a Memorandum of Understanding (No SF 54 373) with
the Atomic Energy Commission (AEC),  the U. S. Public Health Service
(PHS) provided a program of radiological monitoring and environmental
sampling in the off-site area surrounding the restricted area
enclosed by the Nevada Test Site (NTS) and the Nell is Air Force
Range (NAFR).  This complex includes the Nuclear Rocket Development
Station (NRDS) and the Tonopah Test  Range (TTR) and for simplicity
will be called the test range complex in this report.

PHS monitors begin tracking an effluent cloud close to Its point of
origin to approximate its trajectory and to initiate positive instru-
ment readings.  This report includes descriptions of the methods and
instruments used by the PHS and summaries of the positive data
obtained off-site.

The winds aloft at the time of the event were from the north from
the surface to 7000 feet mean sea level  (MSL) with speeds ranging
from ten to seventeen knots.

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                      II.  OPERATIONAL PROCEDURES

A.   RADIATION MONITORING
     1.   Monitoring Teams
     Five monitoring teams were located off-site and downwind to
     observe any radiation dose rates.  Each team was equipped
     with an Eberline Model E-500B Geiger-Muel1er instrument, a
     Victoreen Radector Model  AGB-50B-SR integrating ion chamber
     and a Precision Model 111 Standard "Scinti1lator".

     The Eberline E-500B has a range of 0 to 200 mi 11iroentgens per
     hour (mR/hr) gamma and beta-gamma detection in  four scales
     with an external halogen filled G.M. tube and a supplementary
     range to 2000 mR/hr (gamma only) from an internal  Anton 302
     tube.  The Precision Model 111 "Scinti1lator" is used pri-
     marily for low level detection and has a range of 0 to 5 mR/hr
     gamma in six scales.  This instrument employs a l"xl" sodium
     iodide crystal as the detector.  The Victoreen Model AGB-50B-SR
     "Radector" has a range of 0.05 to 50,000.mR/hr  gamma or beta :plus
     gamma in two scales and employs an  internal ionization chamber
     detector.  These instruments are accurate to approximately
     +20%.

     2.   Dose Rate Recorders
     Eberline RM-11 dose rate recorders are routinely operated at
     21 locations surrounding the test range complex.  These
     instruments have a Geiger-Muel1er detector with a dose rate
     recorder which logarithmically displays gamma dose  rates from
     0.01 to 100 mR/hr.  The  instrument accuracy is +207ğ.  Locations
     of these recorders are shown  in Figure 1.

     3.   Aerial Cloud Tracking
     Two aircraft were used to sample and track the effluent cloud,
     a C-45 and a U3-A.  The former is primarily for air sampling
                                   2

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and the latter for tracking.   The air sample data collected
by the aircraft are not a  part of this report.

DOSIMETRY
External  gamma dosimetry is  accomplished primarily through the
use of film badges.   DuPont  type 555 film is used with an accuracy
of +50% in the 20 to 100 mR  range and +10% in the 100 to 2000 mR
range.  The PHS maintains  67  film badge stations in the off-site
area.   In addition to these,  there are 139 personnel  badges issued
to people residing in the  areas surrounding the test range
comp1 ex.

ENVIRONMENTAL SAMPLING
1.   Air ;
     There are 43 air sampling stations in continuous operation
     in the vicinity of the  test range complex as shown in
     Figure 1.  Eighteen of  the samplers contain MSA charcoal
     cartridges with a Whatman No.541  prefilter, the remainder
     have the prefilter alone.  Each of the ground monitoring
     teams is equipped with  a generator and air sampler identi-
     cal  to those used for routine sampling stations.  The
     sampler used by the PHS  is a Gelman "Tempest".

     All  prefilter papers  and charcoal cartridges collected
     following the Drill Event were returned to the Southwestern
     Radiological Health Laboratory for analysis.  The Whatman 541
     filters were counted  for gross beta activity with a Beckman
     Wide Beta system.  The  detector is a five  inch (diameter)
     gas  proportional chamber.  The system has a background of
                                                 90
     6 cpm and an efficiency  of 457., for strontium   beta particles,
     Based upon the beta activity, the samples are sorted for
     further gamma spectrum  or radiochemica1 analysis.  After the
     gross beta counts are used to indicate the effluent trajec-
     tory, the samples are stored for five days to allow natural

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     radionuclides  to  decay.   The filters  are  counted  again and,
     after  seven more  days  are again  counted.   The  results are
     extrapolated  to  the  time of  sample collection.   Several
     more active samples  are  selected for  frequent  counting to
     establish  decay  curves.   The resultant  curves  have  the
     general  form.of  y=ax .   In this  case  the  independent vari-
    . able  is  time  and  b  is  the slope  of the  curve plotted
     .logarithmically.

     All charcoal  cartridges  were scanned  for  gamma  emitting
     isotopes  as were  a  few selected  Whatman 541-filters. Each
     sample was placed directly on a  4"x4" Nal(Tl)  crystal, and
     given  a  ten minute  count.  A 400 channel  analyzer was set
     to  "view" gamma  energies from 0  to 2  Mev.  Assuming no
     break  in.the  prefilter,  the activity  on the cartridge should
     represent the gaseous  fission products  only, such as the
     .isotopes  of  iodine.   The detection efficiency  is  1870 for
                                 1 33
     the 0.53  Mev  gamma  ray from     I and  6.47ğ for  the 0.364  Mev
     gamma  ray of     I,   The  detection threshold for    I.,
        I,     I and    I  is 200 picocuries in  the cartridge with
     an  overall accuracy  of +507= for  iodines 131, 132  and 133;
     and +1007o for iodine 135.  An IBM 1620 computer is  pro-
     grammed  for a matrix technique for eight  selected isotopes
     which  allows  other  isotopic activity  to be stripped from
     the spectra.   The program allows variable input so  that  many
     more  than eight  isotopes can be  gleaned by this method.
     Error  analysis of the process'does not allow detection of
     concentrations of less than one  picocurie per  cubic rneter.

2.    Milk  Samples
     Routine  milk  samples are collected monthly from 14  locations
     and weekly from five locations  in the vicinity of the  test
     range  complex as shown by Figure 2.  Other sampling locations

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     have been determined from surveys  made in  cooperation  with
     the State Health Departments  of Nevada,  Utah,  Arizona,  and
     California.   Milk samples are taken for  a  minimum of  5 days
     from locations suspected of  being  in the effluent's  trajectory,

     Each milk sample is  placed in a 3.5 liter  aluminum Marinelli
     beaker,  designed to  fit over  a 4"x4" crystal  which is  coupled
     to a 400 channel analyzer.  The lower limit  of detection  for
     the gamma emitters in milk is 20 picocuries  per liter.  The
     error associated with this method  is +2Q picocuries per 1iter
     (pCi/1)  or 107,,,  whichever'is  greater] •

3.    Water Samples
     Thirty-two water samples are  collected on  a  routine basis
     every month from the locations shown in  Figure 2.   In  the
     event of a release,  additional water samples  are collected
     from locations within the suspected trajectory.  Water
     samples  are analyzed by the  same procedures  employed with
     milk.

4.    Vegetation Samples
     Vegetation samples are not collected on  a  routine basis,
     but only in the event of a release of radioactive material.
     Vegetation analysis  is a good indicator  of cloud path.   Green
     'samples  are superior to dormant or dry vegetation; for ob-
     vious reasons, greater leaf  area is more desirable.  These
     samples  are packed into a beaker and gamma scanned.  The
     detection limit is on the order of 200 picocuries for  the
     ent i re samp 1e.

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                             III.   RESULTS

A.   RADIATION MONITORING
     1.    Ground Monitoring
          Monitoring teams located off-site first  encountered  the
          effluent cloud as it crossed Highway 95  south  of  the
          test range complex.   A maximum dose rate of  0.2 mR/hr
          was noted five miles east of Lathrop Wells at  1830 hours
          PST-on Highway 95.  A reading of 0.01  mR/hr  net gamma
          was observed on Highway 29 seventeen miles south  of
          Lathrop Wells from 1900 to 1903 hours PST.   A  monitoring
          team at Pahrump was  unable to detect any dose  rates
          above background.  Table 1 summarizes the positive
          readings found by the teams.  Appendix A lists the com-
          plete monitoring results.
Table 1.  Summary of dose rates observed by monitoring teams,  December  5,
          1964.
Location Time
(PST)
Hwy. 95, 5 mi E of Lathrop Wells 1810
1820
1825
1830
1831
1845
1850
1855
1900
1905
1915
1920
Hwy. 29, 17 mi S of Lathrop Wells 1900
1901
1902
1903
Net Gamma Dose Rate
(mR/hr)
0.10
0.14
0.08
0.20
0.15
0.08
0.05
0.05
0.04
0.04
0.04
0.04
0.01
0.01
0.01
0.01

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     2.    Dose Rate Recorders
          The only RM-11  Recorder showing a  positive dose rate  in
          relation to background was at Lathrop  Wells.   The  maxi-
          mum dose rate  attributable to the  effluent cloud was
          0.055 mR/hr at  1715  hours PST.   Two  small  peaks (less
          than 0.004 mR/hr)  were observed at 2130 and at 2225.

     3.    Aerial  Cloud Tracking
          Both the C-45  and  the U3-A tracked the effluent cloud  on
          site as the cloud  moved slowly  to  the  south.   The  missions
          were terminated after several hours  due to the imminent
          sunset and lack of fuel.   The EG&G NATS plane  was  able to
          trace the effluent south  over the  Mojave Desert east of
          Bars tow toward  Yuma, Arizona.

B.    DOSIMETRY
     Film badges collected since the event have  shown no exposure
     above the threshold  of  detection (20 mR)  which could be asso-
     ciated with the Drill release..

C.    ENVIRONMENTAL SAMPLING
     1 .    Ai r
          Table 2 lists  the results of  air samples with  positive
          activity..  Quantities are extrapolated to the  end  of  the
          collection period.  Air samples with no detectable concen-
          trations are listed  in Appendix B.

     2.    Milk
          No fresh fission products were  detected in milk samples
          taken at Lathrop Wells, Nevada  from  December 7 to  Decem-
          ber 10.  Based on preliminary information from the EG&G
          NATS flight,  two milk samples were  taken at Summer top,
          Arizona on December  11 with no  activity detected.   The

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          effluent did not pass over any other locations having
          dairy cows; it is for this reason such distant samples
          were taken.
Table 2.  Positive air sample results.
Locat ion
Shoshone, Ca 1 i f .


Lathrop Wei 1 s , Nev.

Death Va 1 1 ey Jet. ,
Cal if .

Samp 1 i ng
Per iod
12/5-1000
12/5-1630
12/5-1630
12/6-1218
12/5-1630
12/6-1218
12/5-1910
12/6-1 114
12/5-1910
12/6-1 114
12/5-0630
12/5-1521
12/5-0630
12/5-1521
Total
Vo 1 ume
132 M3
408
408
330
330
177
177
pC i/m
131j 133!
1.1 <1
N.D. N.D.
N.D. N.D.
N.D. <1 •
N.D. N.D.
<1 <]
N.D. N.D.
Fi Her
135Xe Type
. Whatman
Fi Iter
, „ Whatman
Fi 1 ter
N-D Charcoal
' Ca rt r i dge
, , Whatman
1 . D .- . ,
Fi Iter
N D Charcoal
'Cartridge
. Whatman
Filter
M D. Charcoal
' Car t r i dge
N.D.=Not detectable

     3.    Wa t e r
          Water samples collected on a routine basis since the event  have
          not contained fresh fission products.

     4.    Vegetation
          Fourteen vegetation samples were collected and six of these
          samples contained fresh fission products.  (See Table 3.)

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Table 3.  Results of vegetation samples containing fresh fission products.
Loca t ion
5 mi E. of Lathrop Wells
J-2 mi E of Lathrop Wei Is
Amargosa Farm Area
Shoshone, California


Date
Col 1 ected
12/05
12/05
12/06
12/10
12/10
12/10
132T
Te
60 •
45
N.D.
N.D.
N.D.
N.D.
PC
131,
300
120
150
80
40
N.D.
i/kg
132,
60
45
N.D.
N.D.
N.D.
N.D.
133,
300
150
220
150
70
50
137.
Cs
300
150
390
N.D.
N.D.
N.D.
Appendix C lists the complete vegetation sample results.   N.D.=Not  detectable.

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                           IV.   CONCLUSIONS

The data indicate that the effluent cloud passed in the vicinity  of
Lathrop Wel.ls,  Nevada then crossed Highway 95 in a swath extending
at least twelve miles east and  five miles west of Lathrop Wells.   A
fringe of the cloud passed over Death Valley Junction with the main
path continuing in the direction of Shoshone, California.  Shoshone
was the site of the last positive indication of fission product ac-
tivity although the EG&G NATS preliminary flight information indicated
activity further south.

Lathrop Wells received the highest external gamma dose, estimated at
0.025 mR from the RM-11 recorder there.  The external dose at
Shoshone, California was on the order of the natural  background dose.

Air samples taken from Lathrop  Wells, Nevada and Shoshone, California
showed concentrations of fresh  fission products.  Although positive
results were found in air and vegetation samples taken at Lathrop
Wells, no fresh fission product activity was found in the milk samples
taken there.  Atthis time of year, the ca-ttle are fed from stores of
sheltered dry feed which prevented any uptake in the  milk chain,
thereby eliminating the primary vector.  Also, the water sources  for
the cattle were not exposed.

Higher air concentrations might have been expected at Lathrop Veils
based on the dose rates observed.  Results indicate,  however, that
most of the radionuclides remained airborne  in the effluent cloud as
it passed over Lathrop Wells and the dose rates observed were due to
"shine" from the radioactive isotopes above.

It is concluded that the safety criteria established  by the Atomic Energy
Commission were not exceeded as a result of this event.

                                  10

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            NEVA  DA
                                                              UTAH
• Kolidf I eld
&
                                                                 Dd Knarr^vi ] ]
                                   A I amo
                                     PA HRA NA CA T
                                   Wartr3\   HesquiteD
                                                                           0   10  ;p  30  Ğ0  50

                                                                             5C4LE IN  HILE5
                                                                                 KEY
                                                                     O - Ai r Sampler
                                             )/*)'!   I                 11 - Air Sampler  w/charcoal
    ]Springs
    I
nd i an  Springs
                                                      ARIZONA
Furnace
- NAT. HON. \
                                                                          cartridge
                                                                      • -  Dose Rate Recorder
     Figure 1.  Air sampler  and dose rate recorder  locations.

                                             11

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         NEVA  DA
                                                          UTAH
              Duckwater1 A
AMehhattan    yB|ue Jay
       Warm A
      Spri
                                Warm ASprings Rn.
                                                  ARIZONA
                                                                  A - Milk sampling locations
                                                                  A - Water sampling location
                                  v  i  rs ;
                               rmerjionl  RrK?
   Figure  2.  Milk and water sampling  locations.
                                          12

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       APPENDIX A





GROUND MONITORING RESULTS

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                      GROUND MONITORING RESULTS
LOCATION
Lathrop Wei Is
Lathrop Wells to the Junction of Ash Meadows
Road and Hwy . 95
Junction of Ash Meadows Road and Hwy 95 to
Lathrop Wei 1 s
Lathrop Wells to 5 mi NW on Hwy 95
From 5 mi NW of Lathrop Wells to Jet. of
Ash Meadows Road and Hwy 95 and return
to Lathrop Wei I s
Junction of Ash Meadows Road and Hwy 95
(5 readings).
1 .5 mi E of Lathrop Wei Is
3 mi E of Lathrop Wells (10 readings)
1 mi E of Lathrop Wells
1/2 mi E of Lathrop Wells
Lathrop Wei 1 s
5 mi E of Lathrop Wells
TIME
1415
1430
1445
1500
1500-
1525
1525-
1545
1545-
1550
1550-
1633
1610-
1745
1637
1700-
1745
1750
1751
1755
1810
1810
- 1820
1825
1830
NET GAMMA
DOSE RATE
(mR/hr)
BKG
BKG
BKG
BKG
BKG
BKG
BKG
BKG
BKG
BKG
BKG*
BKG
BKG
BKG*
BKG*
0.1 0
0.14
0.08
0.20 '
*0ccasional  excursions of the scintillator indicated the possible presence
 of airborne contamination.

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GROUND MONITORING RESULTS (cont1)
LOCATION TIME
* 5 mi -E of Lathrop Wells (cont1) 1830
-.- " 1845
1850
1850
1855
1900
1905
1915
1920
Lathrop Wells • 1930
17 mi S of Lathrop Wells on Hwy 29 1730-
(29 readings) 1850
17 mi S of Lathrop Wells on Hwy 29 1900
1901
1902 •
1903
NET GAMMA
DOSE RATE
(mR/hr)
0.15
0.08
0.05
0.05
0.05
0.04
0.04
0.04
0.04
BKG
BKG
0.01
0.01
0.01
0.01
A monitor located at Pahrump,  Nevada during the time following this  event
was unable to detect any dose  rate above background.

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     APPENDIX B





AIR SAMPLING RESULTS

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AIR SAMPLING RESULTS
1. LOCATION DATA
STATION NAME
(Ailmulli and Olilono)
Death Valley Jet . , Cal i f


Shoshone, California

Indian Springs, Nevada
Las Vegas, Nevada
Lathrop Wells, Nevada

Pahrump, Nevada
F=f i 1 ter
Ocar tr i dge
ND=not detectable
II. COLLECTION DATA
UJ
ĞiĞ~
*?*
177
85
227
132
408
477
510
99
330
441


SAMPLING PERIOD
BEGIN
Mo.
12
12
12
12
12
12
12
12
12
12


Doy
05
05
05
05
05
05
05
05
05
05


Time
0630
1521
1930
1000
1630
0832
14)0
1410
1910
1535


END
Mo.
12
12
12
12
12
12
12
12
12
12


Day
05
05
06
05
06
06
06
05
06
06


Time
1521
1930
0630
1630
1218
0742
1500
1905
1 1 14
1200


COLLECTOR
F
C
F
C
F
C
F
F
C
F
C
F
C
F
C
F
C
F
C


III. RADIOASSAY DATA •
GROSS BETA COUNT
DATE-TIME
COUNTED
10 09 1 9
10 0828
11 0835
10 09 1 7
11 0830
1 1 0842
11 0837
10 0826
11 0832
1 1 0840


ACTIVITY
(pCi/m3)
0.32
0.62
0.27
0.30
0.30
0.29
0.24
0.38
0.40
0.27


GAMMA PULSE HEIGHT ANALYSIS
DATE-TIME
COUNTED
06 1739
06 1756
06 1759

06 1744
06 1746
06 1751
06 1736
06 1754
06 1749


ACTIVITYCoCi/mJ)
131. 133. 135. 135V
I 1 I Xe
<1 <1 ND <1
ND ND ND ND
ND ND ND ND
ND ND ND ND
I.I 
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        APPENDIX C






VEGETATION SAMPLING RESULTS

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VEGETATION SAMPLING RESULTS
LOCATION
Summerton, Arizona
0.4 mi W of
0.6 mi W of
Shoshone, Ca
Ogi Iby , Cal i forn ia
Ogilby, Cal i forn i a
1 i forn ia
Selbach Ranch, Lathrop Wells, Nev.
Dansby Ranch
12 mi SE of
, Lathrop Wei 1 s , Nev .
Lathrop Wells, Nev..
5 mi SE of Lathrop Wells, Nev.
DATE
COLLECTED
12/1 1/64
12/1 1/64
12/07/64
12/07/64
12/07/64
12/07/64
12/10/64
12/10/64
,2/10/64
12/07/64
12/06/64
12/06/64
12/05/64
12/05/64
DATE
COUNTED
12/12/64
,2/12/64
12/08/64
12/08/64
12/08/64
12/08/64
12/10/64
12/10/64
12/10/64
12/08/64
12/08/64
12/08/64
12/06/64
12/06/64
132T
Te
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
45
60
131,
ND
ND
ND
ND
ND
ND
ND
40
80
ND
ND
150
120
300
132,
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
45
60
,33,
' ND
ND
ND
ND
ND
ND
50
70
,50
ND
ND
220
,50
300
,35,
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
137Cs
250
155
400
280
580
320
ND
ND
ND
70
800
390
150
300

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                             DISTRIBUTION

James E. Reeves, Manager, NVOO/AEC, Las Vegas, Nevada
Henry G. Vermillion, NVOO/AEC, Las Vegas, Nevada
Otto H. Roehlk, OSD, NVOO/AEC, Las Vegas, Nevada
Col. E. G. Halligan, DASA, NVOO/AEC, Las Vegas, Nevada  (2)
Test Manager, AEC Operations Coordination, Mercury, Nevada
Dr. R.  H.  Goeckermann, LRL, Livermore, California
Dr. Gilbert Potter, LRL,  Livermore, California
Dr. E.  H.  Fleming, LRL, Livermore, California
Wayne R. Woodruff, LRL, CP-1,  Mercury, Nevada
Bryce L. Rich, LRL, Bldg. 101, Mercury, Nevada
Harry Jordan, LASL, Los Alamos, New Mexico
Dr. William E. Ogle, LASL, Los Alamos, New Mexico
Dr. Gordon M. Dunning, DOS, USAEC, Washington, D. C.
Philip  W.  Allen, USWB, NVOO/AEC, Las Vegas, Nevada
Gilbert J. Ferber, USWB,  MRPB  (R-3.3), Washington, D. C.
James G. Terrill, Jr., DRH, PHS, Washington, D. C.
E. C. Anderson, DRH, PHS, Washington, D. C.
D. J. Nelson, TOB, DRH, PHS, Washington, D. C.
A. H. Dahl, DRH, PHS,  Rockville, Maryland
D. L. Snow, DRH, PHS,  Washington, D. C.
Victor  M.  Milligan, REECo, Rad-Safe, Mercury, Nevada
Mail &  Records, NVOO/AEC, Las  Vegas, Nevada
SWRHL,  Las Vegas, Nevada  (2)

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