«vEPA
United States
Environmental Protection
Agency
Annual Water Sampling
and Analysis at the
Salmon Test: Site Area,
Lamar County, Mississippi
April 1995
786RSB.95
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Annual Water Sampling and Analysis
at the Salmon Test Site Area,
Lamar County, Mississippi
April 1995
by
Max G. Davis
Scott H. Faller
U.S. Environmental Protection Agency
Office of Radiation and Indoor Air
Radiation Sciences Laboratory - Las Vegas
P.O. Box 98517
Las Vegas, NV 89193-8517
prepared for the U.S. Department Of Energy
under Interagency Agreement
DE-A108-91NV10963
RADIATION SCIENCES LABORATORY - LAS VEGAS
OFFICE OF RADIATION AND INDOOR AIR
U.S. ENVIRONMENTAL PROTECTION AGENCY
LAS VEGAS, NV 89193-3478
786RSB95
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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 DE-A108-91NV10963 from the United States
Department of Energy (DOE). It has been subject 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.
Subsequent to the completion of this study but prior to publication of this report an internal EPA reor-
ganization resulted in a name change for some organizational elements. The EPA Environmental
Monitoring Systems Laboratory - Las Vegas (EMSL-LV) is now the Characterization Research Division -
Las Vegas (CRD-LV), part of the EPA National Exposure Research Laboratory (NERL). The Radiation
Sciences Division (RSD) is now the ORIA Radiation Sciences Laboratory-Las Vegas, September 30,1995.
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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 directed by the U.S. Environmental Protection Agency conducts annual water sam-
pling on and around the Salmon Test Site Area.
No radioactive materials from the Salmon Test Site Area were detected in any water samples collect-
ed offsite. The highest tritium concentration found in water collected in the offsite area was 33 pCi/L, which
is typical of background tritium levels is 0.16 percent of the National Interim Primary Drinking Water
Regulations (40CFR141). The highest tritium concentration found onsite was 5,110 pCi/L. This was
detected in a water sample collected from Well HM-S, which is a shallow well near surface ground zero.
The water from this well is not available to the public nor is it potable.
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CONTENTS
Page
Notice ii
Abstract iii
Figures v
Acronyms and Abbreviations vi
Acknowledgments vii
Introduction 1
History 1
Historical Monitoring Results 1
Sampling 4
Sample Analysis Procedures 7
Water Analysis Results 7
Conclusion 10
References '. 11
Glossary of Terms 12
Appendices
A. Summary of Analytical Procedures 13
IV
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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 1995 8
10 Offsite locations sampled in 1995 9
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ACRONYMS AND ABBREVIATIONS
DOE U.S. Department of Energy
EMSL-LV Environmental Monitoring Systems Laboratory - Las Vegas
U.S. EPA U.S. Environmental Protection Agency
g gram
Ge(Li) lithium-drifted germanium gamma detector
HpGe High purity germanium gamma detector
keV kilo electron volts = thousand electron volts
kg kilogram, 1000 grams
kt kiloton (TNT equivalent)
LTHMP Long-Term Hydrological Monitoring Program
L liter
m meter
min minute
MDC minimum detectable concentration
MeV million electron volts
mL milliliter = one thousandth of a liter
pCi/L picocuries per liter = 10~12 curies per liter = 1/1,000,000,000,000 curies per liter
PHS . U.S. Public Health Service
SGZ surface ground zero
3H tritium
3H+ enriched tritium
HMH Hydrological Monitoring Hole (1-16)
HM-L, HM-L2 Hydrological Monitoring Well - Local Aquifer
HM-S Hydrological Monitoring Well - Surficial Aquifer
HM-1 Hydrological Monitoring Well - Aquifer 1
HM-2a Hydrological Monitoring Well - Aquifer 2a
HM-2b Hydrological Monitoring Well - Aquifer 2b
HM-3 Hydrological Monitoring Well - Aquifer 3
HT-2c Hydrological Test Hole
HT-4 Hydrological Test Hole
HT-5 Hydrological Test Hole
RSD Radiation Sciences Division
VI
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ACKNOWLEDGMENTS
The authors would like to acknowledge James R. Harris, Herbert Maunu, Kenneth Giles, Julius Barth,
and the staff of the hydrological monitoring group, U.S. Environmental Protection Agency, for their dedica-
tion to quality and their tireless work in the execution of the sampling effort.
Vll
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INTRODUCTION
Under an Interagency Agreement with the U(.S.
Department of Energy (DOE), the Radiation
Sciences Division (RSD) of the U.S.
Environmental Protection Agency (EPA) located in
Las Vegas, NV, conducts a Long-Term
Hydrological Monitoring Program (LTHMP) to
measure radioactivity concentrations 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 1995, on and around the Salmon
Test Site Area, in Lamar County, Mississippi.
History
Project Dribble, consisting of two nuclear explo-
sions, 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. This area is
now called the Salmon Test Site Area (Figure 2)
and contains approximately 1,470 acres located in
Sections 11, 12, 13, and 14, Township 2 North,
Range 16 West.
Test Date
10-22-64
12-03-66
02-02-69
04-19-70
Name
Salmon
Sterling
Diode Tube
Humid Water
Type
Nuclear
Nuclear
Gas
Gas
Yield (kt)
5.3
0.38
0.32
0.32
These tests were part of the Vela Uniform pro-
gram of the U.S. Atomic Energy Commission (now
the DOE). The purpose was to measure and evalu-
ate 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 pro-
gram, 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 contamination.
Historical Monitoring Results
The disposal of drilling mud and fluids near the
surface ground zero (SGZ) is possibly responsible
for tritium ('H) contamination of the nearby ground
water and surficial 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 contami-
nation 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), and is thought to be due
to drilling activities at the site (Fenske and
Humphrey, 1980; Fordham and Fenske, 1985).
Of the twenty-eight wells that are sampled on
the Salmon Site, five regularly have tritium values
1
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Prentiss
—
Monticello
Seminary
Bassfield \ f Moselle
Eatonville
Runnelstown
Bunker Sumrall
Hill
Hattiesburg Richton
Purvis Y Beaumont
Pinebur 9 •Talowah .
Baxterville J 4 Brooklyn
~~\ • Lumberton
Varnado A, •
MISSISSIPPI
LOUISIANA
Bogalusa ^ ,•
Major Highway
Test Site, SGZ
Figure 1. General site location of Project Salmon Test Site Area.
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Wells with significant tritium contamination TATUM DOME TEST AREA
are found within this circle with a radius BOUNDARY
of 1400 feet (430m)
T
w
JCD
1
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HALF MOON CREEK
ALLUVIAL AQUIFER
GROUND
SURFACE
LOCAL AQUIFER
AQUIFER 1
: ili: AQUIFER 2A
AQUIFER 2B
AQUIFER 3A
AQUIFER 3B
AQUIFER 4
AQUIFER 5
FLUID LEVEL
RECRYSTALLIZED
MELT PUDDLE
*The test cavity contains fission and activation products from the detonations plus
10,770 cubic yards of radioactive, contaminated soils and 1.305.OOO gallons of
SANDSTONE contaminated fluids and water from surface cleanup.
Figure 3. Test cavity and aquifers.
above those expected in surface water. 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 Figures 4-8.
The solid line in the graphs represents the normal
radioactive decay of tritium.
Surface water collected from the Half Moon
Creek overflow pond, which lies adjacent to the
SGZarea, has tritium values above background.
Also, the REECo Pit drainage area, used for the
disposal of drilling mud, occasionally shows ele-
vated levels of tritium.
Sampling
According to standard operating procedures
(U.S. DOE 1981), the HMH wells on the test site
were first sampled, pumped dry, and sampled again
the following day. Wells HM-1, HM-2A, HM-2B,
and HM-3, 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 sta-
bility was reached. Well HM-L, which also lies
near SGZ, was initially sampled and then pumped
steadily for 24 hrs, with samples taken at one hour
intervals. 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 loca-
tions in Columbia, Mississippi (not shown). The
sampling results are discussed in the following
sections.
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100
80
WELL HMH-1
Project Dribble
o g
Q. V)
GO
X H 40
20
+ Measured
— Predicted by decay of H-3
80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95
Calendar Year
Figure 4. Tritium concentration vs. sampling year for HMH-1 (depth = 10 ft). The high value in
1983 occurred in a sample taken during the dry fall season.
WELL HMH-2
Project Dribble
40
30
o s
a. 20
-
10
+ Measured
— Predicted by decay of H-3
-f
80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95
Calendar Year
Figure 5. Tritium concentration vs. sampling year for HMH-2 (depth = 10 ft).
5
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12
10
WELL HMH-5
Project Dribble
^
+ Measured
— Predicted by decay of H-3
80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95
Calendar Year
Figure 6. Tritium concentration vs. sampling year for HMH-5 (depth = 10 ft).
Well HM-S
Project Dribble
40
30
o g
S § 20
«? 5 I
10
4- Measured
- Predicted by decay of H-3
4-
- 4-
J 1 L.
80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95
Calendar Year
Figure 7. Tritium concentration vs. sampling year for HM-S (depth = 30 ft).
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WELL HM-L
Project Dribble
3000
2500
-- 2000
O
i 1500
1000
X
x Measured
— Predicted by H-3 decay
X
X
X
X
I t I
500 ' ' ! ' ' ' ' ' ! ' 1 ' L—-
80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95
Calendar Year
Figure 8. Tritium concentration vs. sampling year for HM-L (depth = 200 ft).
Sample Analysis Procedures Water Analysis Results
The procedures for the analysis of samples col-
lected for this report were described by Johns et al.
(1979) and are summarized in Appendix A. These
include gamma spectral analysis and radiochemical
analysis of tritium. The procedures are based on
standard methodology for given analytical proce-
dures. Two methods for tritium analysis are per-
formed: conventional and electrolytic enrichment.
The samples are initially analyzed by the conven-
tional method. If the tritium result is less than
700 pCi/L, the sample is then analyzed by the elec-
trolytic enrichment method which lowers the mini-
mum detectable concentration (MDC) from
approximately 300 pCi/L to 10 pCi/L. Sample
results are corrected for the background radioactiv-
ity in the laboratory.
Gamma-ray spectral analysis results indicated
that no man-made gamma-emitting radionuclides
were present in any onsite or off site samples above
the MDC. The highest tritium concentration (which
is a beta emitter only) above the MDC in water col-
lected from the offsite area was 33 pCi/L. This is
typical of background tritium levels and is 0.16
percent of the National Interim Primary Drinking
Water Regulations (40CFR141), which places the
maximum level of tritium in drinking water at
20,000 pCi/L. The onsite water sample from Well
HM-S had the highest tritium concentration, 5110
pCi/L, which is 25.5 percent of the drinking water
regulation. The well HM-S is less than 30 feet in
depth and is located approximately 5 feet west of
SGZ. The water is not accessible to the public nor
suitable for drinking due to its brackishness.
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HMH-16
Former
Decontamination
Pad Location J~
HMH-12 \ Bridge
\
HMH-5 \
Hunting
Club Well
"N*
\
\Q
• 03
\*
• HMH-11
HMH-2 "HMH-9
\
/
\
Scale in Meters
100
200
• Location/water sample
0 Surface Ground Zero
I Well HT-2C
N
1391gtNR093-5
Figure 9. Locations on the Salmon Test Site Area sampled in 1995.
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I B. Dennis
I M. Dennis
I Columbia City Little Creek #1-,
Well 64B Lee Anderson -j
Tim L. Bilbo -i
Yancy Saucier—|
Philip Gibson -i
Gil Ray's Crawfish Pond
Lower Little Creek #2
i— Willie Surge
I r~Joe Surge
Salt Dome Timber Co.
Herman Gipson
Howard Smi
Howard
Smith Pond
A.C.
Mills
Roy Mills
B. Chambliss R. King*
n'c PnnH J
P.T. Lee
R.H. Anderson
E.Cox
W.H. Noble Jr
G.W. Anderson
Noble's Pond
5Sylvester Graham
Rushing
Purvis City Well
^
G.Ray
E.J. Smith
Lee L. Saul
S. Powers and
_ B. Bond (2)
Noble's Quail
House
Tatum Hunting Club
Regina Anderson
Ray Daniels •_ R.L Anderson Sr.
Daniel's Fish1^ R-L- Anderson Jr
Pond Well #2
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. Off site locations sampled in 1995.
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CONCLUSION
No radioactive materials attributable to the wells located near SGZ. This water is not available
Salmon Test Site Area were detected in samples to the public nor is it fit for human consumption.
collected in the offsite areas. Tritium was the only The tritium concentrations arc well below 20,000 pCi/L
radioactive contaminant detected onsite and was level defined in the EPA National Interim Primary
found in brackish water collected from shallow Drinking Water Regulations (40CFR141).
10
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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.
11
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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 (uCi) is 0.000001 Ci.
Isotope
Atoms of the same element with different num-
bers of neutrons in the nuclei. Thus 12C, 13C, 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 12C
and 13C are stable, I4C is radioactive).
Enrichment Method
A method of electrolytic concentration that
increases the sensitivity of the analysis of tritium in
water. This method is used if the tritium concen-
tration 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 H 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 pre-
cipitation infiltration of the soil. This shallow
ground water is not an aquifer.
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.
PreSample
Fkst 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.
12
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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-
Gamma" calibrated at 0.5 keW
channel (0.04 to 2 MeV
range) individual detector
efficiencies ranging from
15 to 35%.
100 min Radionuclide concen-
tration quantified from
gamma spectral data by
online computer program.
3.5 L
Varies with radionuclides.
3H
3H+
Enrichment
(LTHMP
samples)
Automatic liquid
scintillation counter
with output printer.
Automatic liquid
scintillation counter
with output printer.
300 Sample prepared by
distillation.
300 Sample concentrated by
electrolysis followed by
distillation.
5 to 10 ml 300 to 700x10-'
pCi/L (11-26 Bq/L)
250 ml 10x10-"pCi/L
(3.7 x 10-' Bq/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 per-
cent each (DOE 1981).
Gamma spectrometry using a high purity intrinsic germanium (HpGe) detector.
13
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APPENDIX B
TRITIUM RESULTS FOR
WATER
SAMPLE COLLECTION
LOCATION DATE
1995
Baxterville, MS
Anderson, Billy Ray
Anderson Pond
Anderson, Regina
Anderson, Robert Harvey
Anderson, Robert Lowell, Jr.
Anderson, Robert Lee
Anderson, Tony
Bibo, Timothy L
Burge, Joe
Daniels, Webster, Jr.
Daniels -Well #2 Rsh Pond
Half Moon Creek ' Pre
• Post
Half Moon Creek Pre
Overflow Pre Dup
Post
Post Dup
Hilby, Billy*
Kelly, Gertrude*
Napien, Denice
Lee.P.T.
Little Creek #1
Lower Little Creek #2
McGinnis, Gloria
Mills, A. C.*
Mills, Roy
Nobles Pond
4-25
4-25
4-25
4-25
4-25
4-25
4-24
4-25
4-25
4-24
4-24
4-23
4-25
4-23
4-23
4-25
4-25
4-24
4-24
4-25
4-25
4-25
4-24
4-27
4-25
4-25
4-25
SAMPLES
ENRICHED
pCi/L ± 1 SD
11 ± 2.1
13. ± 1.6
13 ± 1.8
11 ± 1.8
14 ± 2.0
19 ± 2.5
13 ± 1.5
20 ± 1.9
11 ± 1.7
19 ± 1.9
9.3 ± 1.2
11 ± 1.4
19 ± 1.7
13 ± 2.0
13 ± 2
186 ± 2.9
197 ± 3.1
12 ± 1.8
33 ± 2.0
18 ± 1.7
10 ± 1.9
14 ± 1.7
10 ± 2.3
16 ± 1.9
COLLECTED IN APRIL, 1 995
TRITIUM TRITIUM COMMENT
MDC pCi/L ± 1 SD MDC
6.6
5.0
5.4
5.7
6.1
7.8
4.6
5.7
5.2
5.7
3.9
4.4
5.0
4.4
6.4
4.9
5.6
5.6
5.7
5.3
6.0
5.2
4.2
5.9
'Indicates results are less than MDC
(Continued)
14
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APPENDIX B Continued
TRITIUM RESULTS FOR WATER SAMPLES COLLECTED IN APRIL, 1995
SAMPLE
LOCATION
COLLECTION
DATE
1995
ENRICHED TRITIUM
pCi/L ± 1 SD MDC
TRITIUM
pCi/L ± 1 SD MDC
COMMENT
Baxterville, MS (Cont.)
Noble, W.H., Jr. 4-25
Pond West of GZ Pre 4-23
Post 4-25
REECo Pit Drainage-A 4-23
REECo Pit Drainage-B 4-23
REECo Pit Drainage-C 4-23
Salt Dome Hunting Club 4-25
Salt Dome Timber Co. 4-25
Saucier, Dennis 4-24
Saucier, Wilma & Yancy* 4-24
Well Ascot 2 4-26
Baxterville Well City 4-26
Well E-7 4-26
Well HM-1*
Well HM-2A*
Well HM-2B*
Well HM-3*
Pre 4-24
1st30min 4-24
2nd 30 min 4-24
Post 4-24
Pre 4-24
1st 30 min 4-24
2nd 30 min 4-24
3rd 30 min 4-24
4th 30 min 4-24
Post 4-24
Pre 4-24
.1st 30 min 4-24
2nd 30 min 4-24
3rd 30 min 4-24
4th 30 min 4-24
Post 4-24
Pre 4-24
1st 30 min 4-24
2nd 30 min 4-24
3rd 30 min 4-24
4th 30 min 4-24
Post 4-24
31 ± 1.8
10 ± 1.4
8.5 ± 1.6
12 ± 1.5
12 ± 1.5
13 ± 1.6
22 ± 2.0
21 ± 1.9
26 ± 2.1
5.2
4.4
4.9
4.7
4.6
4.9
6.0
5.5
6.3
28 ±1.6 4.3
21 ± 2.0 5.8
8.8 ± 2.1 6.7
'Indicates results are less than MDC
(Continued)
15
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APPENDIX B Continued
TRITIUM RESULTS FOR
SAMPLE
LOCATION
Baxterville,
WellHM-L
Well HM-L2*
Well HM-S
Well HMH-1
WellHMH-2
Well HMH-3
Well HMH-4
Well HMH-5
WATER SAMPLES COLLECTED IN APRIL, 1 995
COLLECTION
DATE
1995
MS (Cont.)
Pre
1st hour
2nd hour
3rd hour
4th hour
5th hour
6th hour
7th hour
8th hour
9th hour
10th hour
11th hour
12th hour
13th hour
14th hour
15th hour
16th hour
17th hour
18th hour
19th hour
20th hour
21st hour
22nd hour
23rd hour
Pre
Post
Pre
Pre Dup
Post
Post Dup
Pre
Pre Dup
Post
Dup Post
Pre
Post
Pre
Pre Dup
Post
Dup Post
Pre
Post
Pre
Pre Dup
Post
Dup Post
4-24
4-24
4-24
4-24
4-24
4-24
4-24
4-24
4-24
4-24
4-24
4-24
4-24
4-24
4-24
4-25
4-25
4-25
4-25
4-25
4-25
4-25
4-25
4-25
4-25
4-25
4-23
4-25
4-23
4-24
4-24
4-23
4-24
4-23
4-24
4-23
4-24
4-23
4-24
ENRICHED TRITIUM
pCi/L ± 1 SD MDC
875 ± 6 4.7
900 ± 5 5.4
950 ± 6 4.8
1090 ± 6 5.4
1330 ± 6.0 5.0
404 ± 3.7 5.5
466 ± 5.0 8.2
458 ± 4.0 4.9
444 ± 4.0 4.8
12 ± 2 6.0
12 ± 1.9 6.0
16 ± 1.7 5.3
12 ±1.5 4.8
14 ±1.5 4.7
11 ± 1.6 4.9
TRITIUM
pCi/L ± 1 SD
1120 ±134
1290 ± 134
1260 ± 134
1080 ± 133
1250 ± 134
1460 ± 135
1310 ±134
1380 ± 135
1730 ±136
1400 ± 135
1680 ± 136
1600 ± 136
1450 ± 135
1570 ± 136
1230 ± 134
1720 ± 136
1390 ± 135
1530 ± 135
1600 ± 136
4700 ± 150
5110 ±150
4570 ± 150
5110 ±150
2380 ± 139
3560 ± 144
2400 ± 137
2000 ± 140
1310 ±134
1310 ±134
COMMENT
MDC
425
425
425
425
425
425
425
425
425
425
425
425
425
425
425
425
425
425
425
425
425
425
425
425
425
425
425
425
425
'indicates results are less than MDC
(Continued)
16
-------
APPENDIX B Continued
TRITIUM RESULTS FOR WATER SAMPLES COLLECTED IN APRIL, 1995
SAMPLE
LOCATION
COLLECTION
DATE
1995
ENRICHED TRITIUM TRITIUM COMMENT
pCi/L 1 1 SD MDC pCi/L ± 1 SD MDC
Baxterville, MS (Cont)
Well HMH-6
Well HMH-7
Well HMH-8
Well HMH-9
Well HMH-10
WellHMH-11
Well HMH-12
Well HMH-13
Well HMH-14
Well HMH-15
Well HMH-16
Well HT-2C
Well HT-4
Well HT-5*
Columbia, MS
Dennis, Buddy*
Dennis, Marvin
Well 64B City
Pre
Post
Pre
Pre Dup
Post
Post Dup
Pre
Post
Pre
Post
Pre
Post
Pre
Pre Dup
Post
Pre Dup
Pre
Post
Pre
Post
Pre
Post
Pre
Post
Pre
Post
4-23
4-24
4-23
4-24
4-23
4-24
4-23
4-24
4-23
4-24
4-23
4-24
4-24
4-23
4-24
4-23
4-24
4-23
4-24
4-23
4-24
4-23
4-24
4-26
4-26
4-26
4-26
4-26
4-26
44 ± 2
52 ± 2
9± 2
6.0 ± 2
10± 2
10 ± 1.8
12 ± 2
14 ± 2
25 ±2
24 ± 2
21 ± 2
23 ± 2
18 ±2.
16 ± 1.7
28 ± 2
24 ± 1.7
9± 2
12 ± 2
16 ± 2
11 ± 2
10 ±2
8.6 ±1.6
12 ± 2
12 ± 2
44± 2
44± 2
12 ± 1
8.4 ± 2
11 ± 2
6.5 ± 1.9
5.1
4.2
5.4
5.7
5.1
5.9
6.1
6.0
5.9
4.9
5.9
5.1
5.0
5.2
5.7
4.8
6.8
5.0
6.8
5.0
5.0
6.0
5.8
5.3
4.4
6.7
6.4
6.1
'Indicates results are less than MDC
17
(Continued)
-------
APPENDIX B Continued
TRITIUM RESULTS FOR
WATER SAMPLES COLLECTED IN APRIL, 1995
SAMPLE COLLECTION
LOCATION DATE ENRICHED TRITIUM TRITIUM COMMENT
1995 pCi/L ± 1 SD MDC pCi/L ± 1 SD MDC
Lumberton, MS
Anderson, Arleene
Anderson, Lee L
Bond, Bradley K.
Robert Rogers
Gil Ray's Crawfish Pond
Gipson, Herman*
Gipson, Hewie
Gipson, Michael D.
Gipson, Philip"'
Graham, Sylvester*
Hartfield, Ray*
Powell, Shannon
Dup
Saul, Rushing, Debra
Saul, Lee L*
Saul, Ola
Smith, E.J.
Smith, Howard*
Smith, Howard - Pond
Thompson, Roswell
Well 2 City*
Purvis, MS
Burge, Willie Ray & Cirace
City Supply*
Gil, Ray -House Well*
Rain Sample
IT Compound
4-25 14 ± 2 4.8
4-24 20 ± 2 4.9
4-24 Moved, Trailer Gone
4-25 16 ± 1 3.9
4-24 11 ±2 5.0
4-24
4-24 No Longer Sampled
4-24 16 ± 1.8 5.4
4-24 19 ±1.9 5.7
4-24
4-24
4-24 15 ±2 4.9
4-24 14 ± 1.4 4.4
4-24 24 ± 2 6.6
4-24
4-24 25 ± 2 5.4
4-24 12 ± 2 4.2
4-24
4-24 1 1 ± 2 4.8
4-24 19 ± 2 5.4
4-26
4-25 15 ±3 8.8
4-26
4-24
4-23 8.5 ± 1.7 5.5
'Indicates results are less than MDC
18
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