Annual Water Sampling and Analysis
at the Salmon Test Site Area
Lamar County, Mississippi
April 1998
by
Max G. Davis
Prepared for the U.S. Department of Energy
under Interagency Agreement
DE-A108-96NV11969
RADIATION AND INDOOR ENVIRONMENTS NATIONAL LABORATORY
OFFICE OF RADIATION AND INDOOR AIR
U.S. ENVIRONMENTAL PROTECTION AGENCY
P.O. BOX 98517
LAS VEGAS, NV 89193-8517
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NOTICE
The information in this document has been funded wholly or in part by the United States
Environmental Protection Agency (EPA) through Interagency Agreement (IAG) DE-A108- .
96NV11969 from the United States Department of Energy (DOE). It has been subjected to the
Agency's peer and administrative review, and it has been approved for publication as an EPA
document. Mention of trade names or commercial products does not constitute endorsement or
recommendation for use.
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ABSTRACT
In 1964 and 1966, nuclear explosives were detonated approximately 2,700 feet (823 m)
underground in the Salmon Test Site Area located in Lamar County, Mississippi. Drilling and
clean-up activities have resulted in tritium contamination in close proximity to the surface
ground .zero. The Long-Term Hydrological Monitoring Program (LTHMP), directed by the EPA,
conducts annual water sampling on and around the Salmon Test Site Area and monitors
radiological sampling equipment on the site throughout the year.
In this report the 1998 annual water sampling at the Salmon Site is described, and the
analytical results of the collected samples are given. The highest tritium concentration onsite
was 2.99 x 104 pCi/L in water from one of the new wells added in 1997, see Appendix B, Page
16. No radioactivity attributable to the test site was found in any offsite water samples. The
highest tritium concentration offsite was 24 ± 3.4 pCi/L at the Ascot Well #2. The lower levels
of activity were determined using a tritium enrichment analytical method.
All samples, with the exception of HMH-1 through HMH-16. HM-S and the 15 wells that
were added in 1997, plus the addition of 14 Wells that were added in 1998 (see Appendix B),
were analyzed for presence of gamma-ray emitting radionuclides. None were detected above the
minimum detectable concentration (MDC).
in
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This page is left blank intentionally.
IV
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CONTENTS
Page
Notice ii
Abstract ......... ...,..,... iii
Figures .. vi
Acronyms and Abbreviations vii
Acknowledgments viii
Introduction 1
History 1
Historical Monitoring Results 1
Sampling 4
Sample Analysis Procedures 7
Water Analysis Results 10
Conclusions 11
References 12
Glossary of Terms 13
Appendices
A. Summary of Analytical Procedures 15
B. Tritium Results for Water Samples Collected in April, 1998 16
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FIGURES
Figure Number Page
1 General site location of Project Salmon Test Site Area 2
.2 Topographic map of the .Salmon Test Site Area showing the Surface
Ground Zero and outline of Test Area at 2,700 feet below land surface 3
3 Test cavity and aquifers 4
4 Tritium concentration vs. sampling year for HMH-1 (depth = 10 ft) 5
5 Tritium concentration vs. sampling year for HMH-2 (depth = 10 ft) 5
6 Tritium concentration vs. sampling year for HMH-5 (depth = 10 ft) 6
7 Tritium concentration vs. sampling year for HM-S (depth = 30 ft) 6
8 Tritium concentration vs. sampling year for HM-L (depth = 200 ft) 7
9 Locations on the Salmon Test Site Area sampled in 1998 8
10 Offsite locations sampled in 1998 9
VI
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ACRONYMS AND ABBREVIATIONS
DCG
DOE
EPA
g
HpGe
IAG
keV
kg
kt
L
LTHMP
m
MDC
MeV
min
mL
ORIA
pCi/L
PHS
R&ffi
SGZ
uses
3H
3H+
HMH
HM-L, HM-L2
HM-S
HM-1
HM-2a
HM-2b
HM-3
HT-2c
HT-4
HT-5
SA Wells
Derived Concentration Guide
U.S. Department of Energy
U. S. Environmental Protection Agency
gram
high purity germanium gamma detector
Interagency Agreement
kilo electron volts = thousand electron volts
kilogram, 1000 grams
kiloton (TNT equivalent)
liter
Long Term Hydrological Monitoring Program
meter
minimum detectable concentration
million electron volts
minute
milliliter = one thousandth of a liter
Office of Radiation and Indoor Air
picocuries per liter = 10"12 curies per liter = 1/1,000,000,000,000 curies per
liter
U.S. Public Health Service
Radiation and Indoor Environments National Laboratory
surface ground zero
U.S. Geological Survey
Tritium
Enriched Tritium
Hydrological Monitoring Hole (1-16)
Hydrological Monitoring Well - Local Aquifer
Hydrological Monitoring Well - Surficial Aquifer
Hydrological Monitoring Well - Aquifer 1
Hydrological Monitoring Well - Aquifer 2a
Hydrological Monitoring Well - Aquifer 2b
Hydrological Monitoring Well - Aquifer 3
Hydrological Test Hole
Hydrological Test Hole
Hydrological Test Hole
Source Area Wells
vn
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ACKNOWLEDGMENTS
The author would like to acknowledge James Harris, Donald James, Kenny Giles>
Dennis Farmer, Julius Earth, Richard Flptard, Brian Moore, Kitty .Houston, and the staff of the.
hydrological monitoring group, EPA, for their dedication to quality and their tireless work in the
execution of the sampling effort. .The author would also like to thank Terry Mouck for her .
outstanding support in preparing the graphics and for providing the desktop publishing in the
production of this report.
vm
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INTRODUCTION
Under an Interagency Agreement (IAG) with
the DOE, the EPA's Radiation and Indoor
Environments National Laboratory (R&IE)
located ' in Las Vegas, NV, conducts a
LTHMP to measure radioactivity concen-
trations in water sources near the sites of
underground nuclear explosions. The results
of the LTHMP provide assurance that
radioactive materials from the tests have not
migrated into drinking water supplies. This
report presents the results for the samples col-
lected in April 1998, on and around the
Salmon Test Site Area, in Lamar County,
Mississippi.
History
Project Dribble, consisting of two nuclear
explosions, and Project Miracle Play,
consisting of two non-nuclear gas explosions,
were conducted in the Salmon Test Site Area,
near Baxterville, Lamar County, Mississippi,
between 1964 and 1970. The general area is
depicted in Figure 1. The Salmon Test Site
Area (Figure 2) contains approximately 1,470
acres located in Sections 11, 12, 13, and 14,
Township 2 North, Range 16 West.
Test Date Name
Type
Yield
(kt)
10-22-64 Salmon Nuclear 5.3
12-03-66 Sterling Nuclear 0.38
02-02-69 Diode Tube Gas 0.32
04-19-70 Humid Water Gas 0.32
These tests were part of the Vela Uniform pro-
gram of the U.S. Atomic Energy Commission
(a predecessor agency of the DOE). The
purpose was to measure and evaluate the
phenomena of seismic waves that are induced
from the explosions as compared to those that
occur naturally from earthquakes.
The first explosion, the Salmon Event, created
a cavity in the Salt Dome underlying the
Salmon Test Site Area that was used for the
following three explosions. The top of the
cavity is 1,160 feet (360 m) below the top of
the salt dome which lies 1,500 feet (460 m)
below the land surface (Figure 3).
Following each detonation, the surrounding
area was closely monitored by the U.S. Public
Health Service (PHS). Radiological
monitoring became the responsibility of the
EPA at its inception in 1970, and after the
second site cleanup operation in 1971-72, the
LTHMP was instituted. In this program, all
potable aquifers, several wells, public water
supplies, and some surface waters in the
vicinity of the Salmon Test Site are sampled
and analyzed to determine the presence of
tritium and other radioactive contaminants.
Historical Monitoring Results
The disposal of drilling mud and fluids near
the surface ground zero (SGZ) is possibly
responsible for tritium (3H) contamination of
the soil zone and underlying shallow aquifer.
These waters lie at depths of 4 to 10 feet (1.3
to 3 m) and 30 feet (9 m), respectively, and are
not potable. Tritium contamination is also
present in the potable water of the Local
Aquifer which lies at about 200 feet (62 m).
The observed concentration of 3H at that depth
is well below the concentration specified in
the National Interim Primary Drinking Water
Regulations (40CFR141), which places the
maximum level of tritium in drinking water at
20,000 pCi/L, and is thought to be due to
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Prentiss
—
Monticello
Ellisville
Seminary
Moselle
Eatonville
Runnelstown
*—*
63
Hattiesburg Richton
Bunker Sumrall
Hill
Improve
Columbia
—'
Cheraw
Purvis
Talowah
Pmebur
Baxterville
MISSISSIPPI
LOUISIANA
Major Highway
Test Site, SGZ
16
MIS
LAMAR
COUNTY
LOCATION MAP
Figure 1 General site location of Project Salmon Test Site Area.
2
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Wells with significant tritium contamination SALMON TEST SITE AREA
are found within this circle with a radius BOUNDARY
of 1400 feet (430m)
T
CO
JD
CM
I
Q.
Q.
CO
Half Moon
/ Creek
— r~ Overflow
I Pond
Baxtervtlle
•300
approx. 11/2 miles
N
SCALE IN FEET
0 1000 2000 3000
••
=•1
0 500 1000
SCALE IN METERS
4000 5000
Figure 2 Topographic map of the Salmon Test Site Area showing the Surface Ground Zero and
outline of Test Area at 2,700 feet below land surface.
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CITRONELLE
AQUIFER
HALF MOON CREEK
ALLUVIAL AQUIFER
WELL
HT-2
TEST CAVITY
SALT DOME*
GROUND
SURFACE
LOCAL AQUIFER
AQUIFER 1
AQUIFER 2A
AQUIFER 2B
AQUIFER 3A
AQUIFER 38
AQUIFER 4
AQUIFER 5
HIGHLY
RADIOACTIVE
MATERIAL
FLUID LEVEL
RECRYSTALLIZED
MELT PUDDLE
LIMESTONE *The test cavity contains fission and activation products from the detonations plus
10,770 cubic yards of radioactive, contaminated soils and 1.305.000 gallons of
SANDSTONE contaminated fluids and water from surface cleanup.
Figure 3 Test cavity and aquifers.
drilling activities at the site (Fenske and
Humphrey, 1980; Fordham and Fenske, 1985).
Of the 55 wells that are sampled on the Salmon
Site, five regularly have tritium values above
those expected in surface water values. These
include surface ground water wells HMH-1,
HMH-2, HMH-5, Local Aquifer well HM-L,
and Surficial Aquifer Well HM-S. Plots of
tritium concentration vs. time for these wells
are shown in Figure 4 to 8. The solid line in the
graph represents the normal radioactive decay
of tritium. Surface water collected from the
Half Moon Creek overflow pond, which lies
adjacent to the SGZ area, has tritium values
above background. Also, the REECo Pit
drainage area, used for the disposal of drilling
mud, occasionally shows elevated levels of
tritium.
Sampling Collection
According to standard operating procedures
agreed to by DOE (U.S. DOE 1981), the HMH
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90
80
70
60
?! 50
\-s CO
Q. «
I 1 40
co H
30
20
10
0
+• Measured
Predicted by 3H
. ..• decay
-t- 4-
4-
4-
4- -t-
t i"" i T
eg3
Calendar Year
Figure 4 Tritium concentration vs. sampling year for HMH-1 (depth = 10ft).
CO
40
30
20
10
*""
±
t i t
Measured
Predicted by 3H
decay
4-
I I I I I
4-
I I J. J_
/
V o>
-------
12
10
+- Measured
-'- Predicted by 3H decay
-t-
-I-
I I I I I
-t-
-r- -I-
-I-
I I I
Calendar Year
Figure 6 Tritium concentration vs. sampling year for HMH-5 (depth = 10 ft).
40
30
20
10
-r-
-f-
•f Measured
Predicted by 3H decay
H-
1 -t-
I I I
Calendar Year
Figure 7 Tritium concentration vs. sampling year for HM-S (depth = 30 ft).
6
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.3000
2500 .
G" 2000
O
1500
1000
500
X
X Measured
Predicted by 3H decay
X
X
X
'"X -X
I I I I I
Calendar Year
Figure 8 Tritium concentration vs. sampling year for HM-L (depth = 200 ft).
wells on the test site were first sampled,
pumped-dry, and sampled on the following
day as were the 15 new wells added in 1997.
The 14 new wells added in 1998 were purged
three volumes of water and then sampled.
Wells HM-1, HM-2A, HM-2B, HM-3, and
HM-L, which lie adjacent to SGZ were first
sampled and then pumped steadily while
further samples were taken at 30 min
intervals until the pH and conductivity of the
water stabilized. A final sample was taken
from each well 30 min after stability was
reached. Water samples were taken from
sources near the SGZ area (i.e. Half Moon
Creek, Half Moon Creek Overflow, and the
Pond west of SGZ) before and after the
pumping operations to identify any resulting
changes in tritium concentration. Well HM-L2
was first sampled and then pumped for one
hour before a second sample was taken. All
other water supplies of this study were
sampled only once.
The locations of all sampling sites are shown
in Figures 9 - 10. Sampling also included
three locations in Columbia, Mississippi (not
shown). The sampling results are discussed in
the following sections.
For wells with operating pumps, the samples
are collected at the nearest convenient outlet.
If the well has no pump, a truck-mounted
sampling unit is used. With this unit it is
possible to collect three-liter samples from
wells as deep as 1800 meters (5,900 ft.). At
the sample collection sites, the pH,
conductivity, water temperature, and sampling
depth are measured and recorded when the
sample is collected.
Sample Analysis Procedures
The procedures for the analysis of samples
collected for this report were described by
Johns et al. (1979) and are summarized in
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• Well HM-L2
' ' ,
'SA4-1-M
>SA2-4-L
• SA2-3-L
SA2-5-L S/V2-2--L
REECo Pit i
HMH-10
HalfMoonM-
Creek Overflow *"
\
SA3-8-1
-H-S
SA3-10-2
N
)SA5-4-4
SA"5-3-M SA5-2-M
• Weil HT-2C
SA5-5-4
Surface Ground Zero
Water Sampling Locations
New Wells Added in 1998
This map is not to scale
Scale in Feet
1000
2000 MISSISSIPPI
0 100 200 300 400 500
Scale in Meters
LAMAR
COUNTY
LOCATION MAP
Figure 9 Locations on the Salmon Test Site Area sampled in 1998.
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• B. Dennis
• M. Dennis
• Columbia City Little Creek #1n
Well 64B
Lee Anderson "
Lower Little Creek #2 -,
Gil Ray's Crawfish Pond
G. Kelly
i— vv
I r~JoeBurge
Salt Dome Timber Co.
Howard
Smith Pond
P.T. Lee
R.H. Anderson
R. Rogers
W.H. Noble Jr
Arleene Anderson
Noble's Pond
„ u-,, • R°yMills
B. Hibley
Anderson's.Pgnd _
B.R. A'ncferso'n":
Purvis City Well
*•-
G. Ray
Dennis
Saucier Jr.
Ola Saul
Ray Hartfield
Steve Cockerham
Ray Daniels • R-L. Anderson Sr
Daniel's Fish
Pond Well #2
R.L. Anderson Jr.
W. Daniel Jr.
Baxterville
City Well
Lumberton
City Well 2
Surface Ground Zero
Water Sampling Locations
Tatum Dome Test Area
Scale in Miles
1 2
01234
Scale in Kilometers
Figure 10 Offsite locations sampled in 1998.
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Appendix A. These include gamma spectral
analysis and radiochemical analysis of tritium.
The procedures are based on standard
methodology for given analytical procedures.
Two methods for tritium analysis are
performed: conventional and electrolytic
enrichment. The samples are initially analyzed
by the conventional method. If the tritium
result is less than 700 pCi/L, the selected
sample is then analyzed by the electrolytic
enrichment method which lowers the
minimum detectable concentration (MDC)
from approximately 300 pCi/L to about 5
pCi/L. The upper level of 700 pCi/L has been
established for the tritium enrichment method
as sample cross contamination becomes a
problem at higher ranges. In late 1995, it was
decided that only 25% of all tritium samples
collected would be analyzed by the
enrichment method, due to budget constraints
and the time required to do the analysis as
well as past results indicating low levels of
tritium. All samples are screened to determine
which ones may be analyzed by the
enrichment method. Sample results are
corrected for the background radioactivity in
the laboratory. The first time samples are
collected from a well, 89-90Sr, "8,239+2^ and
uranium isotopes are determined by
radiochemistry. At least one of the cubitainers
from each site is analyzed by gamma
spectrometry. At this time, only sampling
locations that are in position to show
migration are selected for enrichment.
Water Analysis Results
Gamma-ray spectral analysis results indicated
that no man-made gamma-emitting
radionuclides were present in any onsite or
offsite samples above the MDC. Long-term
decreasing trends in tritium concentrations are
evident for those locations that had detectable
tritium activity at the beginning of the
LTHMP, such as in the samples from the
Baxterville City Well depicted in Figure 10
and Well HM-S shown in Figure 7. Due to
the high rainfall in the area, the normal
sampling procedure is modified for some of
the onsite wells as stated below. The second
samples may be representative of formation
water, whereas the first samples may be more
indicative of recent rainfall. Of the 55
locations sampled onsite, 34 sites sampled
twice (pre-and post-pumping), 25 yielded
tritium activities greater than the MDC in
either the first or second sample. Of these, 16
yielded results higher than normal background
(approximately 60 pCi/L [2.2 Bq/L]) as shown
in Appendix B. The locations where the
highest tritium activities were measured
generally correspond to areas of known
contamination. Decreasing trends are evident
for the wells where high tritium activities have
been found, such as Well HM-S depicted in
Figure 7. No tritium concentrations above
normal background values were detected in
any offsite samples.
In 1998 an additional 14 shallow wells were
added to the annual sampling, which range in
depth of 195' to 2100', increasing the total
wells sampled onsite to 55. Five of the
previous locations regularly have tritium
values above those expected in surface water
samples; of the 14 new wells, tritium values
were all below the MDC. The water in these
wells is not accessible to the public, nor
suitable for drinking due to its brackishness.
Only five wells were above the MDC in the
samples collected from the offsite sampling
locations, tritium activity ranged from less
than the MDC to 24 ± 3.4 pCi/L at the Ascot
Well in Baxterville, 0.14 percent of the DCG.
10
-------
These results do not exceed the natural tritium
activity expected in rain water in this area.
Conclusions
No radioactive materials from the Salmon
Test Site Area were detected in any water
samples collected offsite. The highest tritium
concentration found in water collected in the
offsite area was 21 ± 3.4 pCi/L, which is
typical of background tritium levels, and is
0.12 percent of the National Interim Primary
Drinking Water Regulations (40CFR141).
The highest tritium concentration found onsite
was 29,900 pCi/L. This was detected in a
water sample collected from Well SA1-1H
which is a shallow well (40') near SGZ. The
water from this well is not available to the
public nor is it potable.
The tritium concentrations, except for Well
SA1-1H, were all well below the 20,000
pCi/L level defined in the EPA Drinking
Water Regulations (40CFR141).
Tritium concentrations of water samples
collected onsite and offsite are consistent'with
those of past studies at the Salmon Site.
All samples were analyzed for presence of
gamma-ray emitting radionuclides with the
exception of HMH-1 though HMH-16 and the
15 shallow wells that were added to the
LTHMP program in 1997. None were
detected above the MDC (see Appendix B on
page 16).
11
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REFERENCES
Code of Federal Regulations, Vol. 41, title 40,
Part 141, July 9, 1976, National Interim
Primary Drinking Water Regulations.
A Guide for Environmental Radiological
Surveillance at U.S. Dept. of Energy
Installations, July 1981,Office of Operational
Safety Report. Las Vegas, NV: U.S.
Department of Energy; DOE/EP-0023.
Fenske, P. R.; Humphrey, T. M., Jr. The
Tatum Dome Project Lamar County,
Mississippi. Las Vegas, NV: U.S. Department
of Energy, Nevada Operations Office; NVO-
225; 1980.
Fordham, J. W. Fenske, P. R. Tatum Dome
Field Study Report and Monitoring Data
Analysis, Las Vegas, NV: U.S. Department of
Energy, Nevada Operations Office;
DOE/NV/10384-03; 1985.
Johns, F., et al. 1979. Radiochemical and
Analytical Procedures for Analysis of
Environmental Samples. Las Vegas, NV:
U.S. Environmental Protection Agency;
EMSL-LV-0539-17-1979.
12
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GLOSSARY OF TERMS
Background Radiation
The radiation in man's environment, including
cosmic rays and radiation from naturally-
occurring and man-made radioactive elements,
both outside and inside the bodies of humans
and animals. The usually quoted average
individual exposure from background
radiation is 125 millirem per year in mid-
latitudes at sea level (Shein & Terplak, 1984).
Curie (Ci)
The basic unit used to describe the rate of
radioactive disintegration. The curie is equal
to 37 billion disintegrations per second, which
is the equivalent of 1 gram of radium. Named
for Marie and Pierre Curie who discovered
radium in 1898. One microcurie OuCi) is one
millionth of a Ci.
Isotope
Atoms of the same element with different
numbers of neutrons in the nuclei. Thus 12C,
I3C, and 14C are isotopes of the element
carbon, the numbers denoting the approximate
atomic weights. Isotopes have very nearly the
same chemical properties, but often different
physical properties (for example 12 C and l3 C
are stable, l4 C is radioactive).
Enrichment Method
A method of electrolytic concentration.-, that
increases the sensitivity .of the analysis of
tritium in water. This method is used by R&IE
if the tritium concentration is less than 700
pCi/L.
Minimum Detectable Concentration
(MDC)
The smallest amount of radioactivity that can be
reliably detected with a probability of Type I and
Type II errors at 5 percent each (DOE 1981).
Offsite
Areas exclusive of the immediate Salmon Test
Site Area.
Onsite
Refers to the immediate vicinity of the
Salmon Test Site Area.
Shallow ground water
Water found near the soil surface, caused by
precipitation infiltration of the soil. This
shallow ground water is not an aquifer.
13
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GLOSSARY OF TERMS
(Continued)
Surficial Aquifer
The ground water layer located closest to the
surface, generally at a depth of approximately
30 feet at SGZ.
Tritium
A radioactive isotope of hydrogen that decays
by beta emission. Its half-life is about 12.5
years.
Pre Sample
First sample taken from wells onsite (before
pumping).
Post Sample
Last sample taken from wells onsite (after
recharge).
Type I Error
The statistical error of accepting the presence
of radioactivity when none is present.
Sometimes called alpha error.
Type II Error
The statistical error of failing to recognize the
presence of radioactivity when it is present.
Sometimes called beta error.
14
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APPENDIX A
Summary of Analytical Procedures
Type of
Analysis
Analytical
Equipment
Counting
Period (Min)
Analytical
Procedures .
Sample
Size
Approximate
Detection Limit" .
HpGe HpGe detector -150
Gamma" calibrated at 0.5 keV/
channel (0.04 to 2 MeV
range). Individual detector
efficiencies ranging from
15 to 35%.
3H Automatic liquid 300
scintillation counter
3H+ Automatic liquid 300
Enrichment scintillation counter
Radionuclide concen-
tration quantified from
gamma spectral data by
online computer program.
3.5L Varies with radionuclides
and detector used, nbrrnally
counted to a MDC of
approx. 5 pCi/L for Cs-137
Sample prepared by
distillation.
Sample concentrated by 5 mL
electrolysis followed by
distillation.
5 to 10 mL 300 to 700 pCi/L
5pCi/L
" The detection limit is defined as the smallest amount of radioactivity that can be reliably detected, i.e., probability
of Type I and Type II error at 5 percent each (DOE 1981).
b Gamma spectrometry using a high purity intrinsic germanium (HpGe) detector.
Typical MDA Values for Gamma Spectroscopy
(100 minute count time)
Geometry
Matrix
Volume
Marinelli
Water
3.5 liter
Model
Density
Units
430G
l.Og/ml
pCi/L
Isotope
MDA
Isotope
MDA
Ru-106
Be-7
K-40
Cr-51
Mn-54
Co-57
Co-58
Fe-59
Co-60
Zn-65
Nb-95
Zr-95
4.76E+01
4.56E+01
4.92E+01
5.88E+01
4.55E+01
9.65E+00
4.71E+00
1.07E+01
5.38E+00
1.24E+01
5.64E+00
9.06E+00
Sn-113
Sb-125
1-131
Ba-133
Cs-134
Cs-137
Ce-144
Eu-152
Ra-226
U-235
Am-241
8.32E+00
1.65E+01
8.28E+00
9.16E+00
6.12E+00
6.43E+00
7.59E+01
2.86E+01
1.58E+01
1.01E+02
6.60E+01
Disclaimer
The MDA's provided are for background matrix samples presumed to contain no known analytes and no decay
time. All MDA's provided here are for one specific Germanium detector and the geometry of interest. The MDA's
in no way should be used as a source of reference for determining MDA's for any other type of detector. All
gamma spectroscopy MDA's will vary with different types of shielding, geometries, counting times and decay time
of sample.
15
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APPENDIX B
TRITIUM RESULTS FOR WATER SAMPLES COLLECTED
Sample
Location
Baxterville, MS
Anderson, Billy Ray
Anderson Pond
Steve Cockerham
Anderson, Robert Harvey
O'Quinn, Jim
Anderson, Robert Lowell, Jr.
Anderson, Robert Lee
Anderson, Tony
Burge, Joe
Daniels, Webster, Jr.
Daniels - Well #2 Fish Pond
Thompson, Mike
Half Moon Creek Pre
Post
Half Moon Creek Pre
Overflow Post
Hibley, Billy
Napier, Denice
Lee, Perry T., Jr.
Collection Enriched
Date Tritium
1998 pCi/L ± 2 SD (MDC)
4-22 11 ±3.2 (4.9)
4-20 12 ±3.3 (5.1)
4-22
4-22
4-20
4-22
4-22
4-21
4-22
4-21
4-21
4-21 Hub water
4-20 14 ± 3.6 (5.4)
4-21 15 ±3.1 (4.7)
4-20
4-21
4-20
4-20
4-20
Tritium
pCi/L ± 2 SD
-38± 137(a)
-76±137(a)
-76 ±137°"
-76±137(a)
191 ± 141(a)
-76±137 No gamma radionuclides detected above MDC.
ND Non-detected. Value in parenthesis represents '37Cs MDC (pCi/L).
16
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APPENDIX B (Continued)
TRITIUM RESULTS FOR WATER SAMPLES COLLECTED IN APRIL. 1998
Sample
Location
Baxterville, MS (Cont)
Lower Little Creek #1
Lower Little Creek #2
Mills, Roy
Nobles Pond
Noble, Evelyn
Pond West of GZ Pre
Post
REECo Pit Drainage-A
REECo Pit Drainage-B
REECo Pit Drainage-C
REECo Pit Drainage-C Dup
Salt Dome Hunting Club
Salt Dome Timber Co.
Saucier, Dennis
Well Ascot 2
Baxterville Well City
Well E-7
Well HM-1 Pre
IstSOMin
2nd 30 Min
Post
Collection Enriched Gamma
Date Tritium Tritium Spectrometry (b)
1998 pCi/L ± 2 SD (MDC) pCi/L ± 2 SD (MDC) Comments (MDC)
4-20
4-20
4-20
4-22
4-22
4-20 13 ±3.5 (5.4)
4-21 12 ±4.0 (6.2)
4-21 11 ±3.5 (5.3)
4-21 72 ±4.1 (4.8)
4-21 70 ±4.2 (4.9)
4-21 344 ±7.7 (6.2)
4-20
4-20
4-20
4-21 24 ± 3.4 (4.9)
4-21 16 ±3.7 (5.5)
4-21 -1.2±2.8(a) (4.7)
4-20
4-20
4-20
4-20
-38±137(a) (227)
38±139(a) (227)
-153±135(a) (227)
38±139(a) (227)
-38±137(a) (227)
No Sample
No Sample
0.00 ± 138(a) (227)
-1.36±166(a) (276)
-65 ±167(a) (276)
-76 ±166°° (276)
57 ±168(a) (276)
ND (5.0)
ND (5.0)
ND (4.8)
ND (4.8)
.ND (4.6)
ND (4.7)
ND (4.6)
- moved
- business closed
ND (4.7)
ND (5.0)
ND (4.5)
ND (4.7)
ND (4.6)
ND (5.0)
ND (4.9)
ND (5.0)
(a) Indicates results are less than MDC.
(h) No gamma radionuclides detected above MDC.
ND Non-detected. Value in parenthesis represents 137Cs MDC (pCi/L)
17
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APPENDIX B (Continued)
TRITIUM RESULTS FOR WATER SAMPLES COLLECTED
Sample
Location
Collection Enriched
Date Tritium Tritium
1998 pCi/L ± 2 SD (MDC) pCi/L ± 2 SD
IN APRIL. 1998
(MDC)
Gamma
Spectrometry (h)
Comments (MDC)
Baxterville, MS (cont.)
Well HM-2A
Well HM-2B
Well HM-3
Well HM-L
Well HM-L2
Well HM-S
Well HMH-1
Well HMH-2
Well HMH-3
Pre
1st 30 Min
2nd 30 Min
Post
Pre
1st 30 Min
Post
Pre
1st 30 Min
2nd 30 Min
3rd 30 Min
Post
Pre
1st 30 Min
2nd 30 Min
3rd 30 Min
4th 30 Min
Post
Pre
Post
Pre
Post
Pre
Post
Pre
Post
Pre
Post
4-20
4-20
4-20
4-20
4-20
4-20
4-20
4-20 1.2±2.9
-------
APPENDIX B (Continued)
TRITIUM RESULTS
Sample
Location
Baxterville, MS
Well HMH-4
Well HMH-5
Well HMH-6
Well HMH-7
Well HMH-8
Well HMH-9
WellHMH-10
WellHMH-11
Well HMH-12
Well HMH-13
Well HMH-14
Well HMH-15
FOR WATER SAMPLES
COLLECTED IN APRIL. 1998
Collection Enriched .
Date Tritium Tritium
1998 pCi/L ± 2 SD (MDC) pCi/L ± 2 SD (MDC)
(cont.)
Pre
Post
Pre
Post
Pre
Post
Pre
Post
Pre
Post
Pre
Post
Pre
Post
Pre
Post
Pre
Post
Pre
Post
Pre
Post
Pre
Post
4-19 9.8 ±3.0 (4.7)
4-20
4-19
4-20
4-19 59 ±4.3 (5.3)
4-20
4-20
4-21
4-20
4-21
4-20 29 ±4.3 (6.1)
4-21
4-19
4-20
4-19
4-20
4-19
4-20
4-19
4-20
4-19
4-20
4-19
4-20
130 ± 160 Indicates results are less than MDC.
(b) No gamma radionuclides detected above MDC.
ND Non-detected. Value in parenthesis represents '37Cs MDC (pCi/L).
19
-------
APPENDIX B (Continued)
TRITIUM RESULTS FOR WATER SAMPLES COLLECTED IN APRIL. 1998
Sample
Location
Baxterville, MS (cont.)
Well HMH-16 Pre
Post
SA1-1H Pre
Post
SA1-2H Pre
Post
SA1-3H Pre
Post
SA1-4H Pre
Post
SA1-5H Pre
Post
SA1-6H Pre
Post
SA1-7H Pre
Post
SA1-8-L
SA1-9-2A
SA1-10-2B
SA1-11-3
SA2-1-L
SA2-2-L
Collection Enriched . Gamma
Date Tritium Tritium Spectrometry (b)
1998 pCi/L ± 2 SD (MDC) pCi/L ± 2 SD (MDC) Comments (MDC)
4-19 57 ±4.3
4-20 67 ±4.3
4-19
4-20
4-19
4-20
4-19
4-20
4-19
4-20
4-19
4-20
4-19
4-20
4-19 33 ±3.9
4-20 30 ±3.5
4-22 1.6 ±2.9(a)
4-23 .09 ± 2.8(a)
4-22 -2.4 ± 3.2(a)
4-22 -1.8±3.0(a>
4-22 1.4 ±3.0(a)
4-22 1.7 ±3.2(a>
(5.3)
(5-1)
29900 ± 447 (276)
27500 ± 399 (227)
3820 ±205 (276)
3950 ±206 (276)
1170 ±180 (276)
939 ± 177 (276)
267 ±170(a) (276)
196 ± 169(a) (276)
701 ± 175 (276)
712 ± 175 (276)
41 ±168 (276)
-68 ±166(a) (276)
(5.4)
(4.8)
(4.8)
(4.7)
(5.4)
(5.0)
(4.9)
(5.1)
ND (5.0)
ND (4.9)
ND (5.0)
ND (5.0)
ND (4.8)
ND (5.0)
-------
APPENDIX B (Continued)
TRITIUM
Sample
Location
RESULTS FOR WATER SAMPLES COLLECTED IN APRIL. 1998
Collection Enriched Gamma
Date Tritium Tritium Spectrometry ih)
1998 pCi/L ± 2 SD (MDC) pCi/L ± 2 SD (MDC) Comments (MDC)
Baxterville, MS (cont.)
SA2-3-L
SA2-4-L
SA2-5-L
SA3-1M
SA3-3M
SA3-4H
SA3-8-1
S A3- 10-2
SA3-11-3
SA4-1M
SA5-1M
SA5-2M
SA5-3M
4-22
4-22
4-23
Pre 4-19
Post 4-20
Pre 4-19
Post 4-20
Pre 4-19
Post 4-20
4-23
4-22
4-23
Pre 4-19
Post 4-20
Pre 4-19
Post 4-20
Pre 4-19
Post 4-20
Pre 4-19
Post 4-20
0.38
0.09
-1.3
10
7.4
11
16
20
21
-0.10
-1.2
0.43
1.7
1.7
12
9.9
14
19
7.2
± 3.0(a)
±3.1(a)
± 5.8(a)
±3.1
±3.3
±3.0
±3.1
±3.3
±3.4
± 3.2(a)
± 3.5°°
±3.4""
± 3.0(a)
± 3.0(a)
±3.1(a)
±3.0
±3.5
±3.3
±3.0
(4.9)
(5.1)
(5.3)
(4.7)
(5-2)
(4.7)
(4.7)
(4.7)
(4.9)
(5.3)
(5.9)
(5.6)
(4.9)
(4.9)
(4.6)
(4.7)
(5.3)
(4.9)
(4.7)
65 ± 167(a) (276)
ND (4.8)
ND (5.1)
ND (4.8)
ND (5.0)
ND (4.5)
ND (4.9)
(a) Indicates results are less than MDC
(h) No gamma radionuclides detected above MDC
ND Non-detected, MDC for gamma represents 137Cs (pCi/L)
21
-------
APPENDIX B (Continued)
TRITIUM RESULTS
Sample
Location
Baxterville, MS (cont.)
SA5-4-4
SA5-5-4
Well HT-2C
Well HT-4
Well HT-5
Columbia, MS
Dennis, Buddy
Dennis, Marvin
Well 64B City
Lumberton, MS
Anderson, Arleene
Anderson, Lee L.
Ron Boren
Ron Boren
Crawfish Pond
Hartfield, Ray
Powell, Shannon
Ladner, Debra Rushing,
Saul O/A
FOR WATER SAMPLES COLLECTED
Collection Enriched
Date Tritium Tritium
1 998 pCi/L ± 2 SD (MDC) pCi/L ± 2 SD
4-22 -0.54 ±2.9°° (4.7)
4-22 2.3 ±2.9(a) (4.7)
4-21 2.2 ±2.9(a) (4.6)
•4-21 -0.81 ±3.2°° (5.3)
4-24 -41 ± 167
4-20 -38 ± 139°°
4-20 38 ± 139°"
4-20 -38 ± 139(a)
4-20 0.00 ± 122
(MDC)
ND (5.0)
ND (4.7)
ND (5.0)
ND (4.6)
ND (5.0)
Water System*
Did not want to participate
(6.3)
(227)
(227)
(227)
(227)
(227)
(202)
No sample; HUB
No sample; HUB
ND (5.0)
ND (4.8)
ND (5.0)
ND (4.9)
ND (5.0)
ND (5.0)
ND (4.2)
Water System*
Water System*
(a> Indicates results are less than MDC.
(b) No gamma radionuclides detected above MDC.
ND Non-detected. Value in parenthesis represents l37Cs MDC (pCi/L).
* Several of the old sampling locations are now on a community water system (HUB).
22
-------
APPENDIX B (Continued)
TRITIUM RESULTS FOR WATER SAMPLES COLLECTED IN APRIL. 1998
Collection Enriched Gamma
Sample Date Tritium Tritium Spectrometry (227) ND (4.9)
76 ±139(a) (227) ND (4.8)
38 ± 139(a) (227) ND (5.0)
38 ± 139(a) (227) ND (5.0)
ND (4.4)
No sample
(h) Indicates results are less than MDC.
(h) No gamma radionuclides detected above MDC.
ND Non-detected. Value in parenthesis represents 137Cs MDC (pCi/L).
23
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