Technical Note
ORP/LV-77-1
OUTDOOR RADON STUDY (1974-1975):
AN EVALUATION OF AMBIENT RADON—222
CONCENTRATIONS IN GRAND JUNCTION,
COLORADO
APRIL 1977
XI
•z
al
U.S. ENVIRONMENTAL PROTECTION AGENCY
OFFICE OF RADIATION PROGRAMS
LAS VEGAS FACILITY
LAS VEGAS, NEVADA 89114
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Technical Note
ORP/LV-77-1
OUTDOOR RADON STUDY (1974-1975):
AN EVALUATION OF AMBIENT RADON-222
CONCENTRATIONS IN GRAND JUNCTION, COLORADO
April 1977
David L. Duncan Lee Grossman
George A. Boysen Colorado Department of Health
Denver, Colorado 80220
Office of Radiation Programs Gustav A. Franz, III
Las Vegas Facility Colorado Department of Health
U.S. Environmental Protection Grand Junction, Colorado 81501
Agency
Las Vegas, Nevada 89114
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DISCLAIMER
This report has been reviewed by the Office of Radiation
Programs-Environmental Analysis Division and Las Vegas Facility,
U.S. Environmental Protection Agency, and approved for publica-
tion., Mention of trade names or commercial products does not
constitute endorsement or recommendation for their use.
11
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PREFACE
The Office of Radiation Programs of the U.S. Environmental
Protection Agency carries out a national program designed to
evaluate population exposure to ionizing and nonionizing radia-
tion, and to promote development of controls necessary to protect
the public health and safety. This report describes a survey
conducted in Grand Junction, Colorado, to evaluate outdoor radon
concentrations on and around the inactive uranium mill site
located in Grand Junction. Readers of this report are encouraged
to inform the Office of Radiation Programs of any omissions or
errors. Comments or requests for further information are also
invited.
Donald W. Hendricks
Director, Office of
Radiation Programs, LVF
111
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CONTENTS
/ -
Page
PREFACE iii
LIST OF FIGURES vi
LIST OF TABLES vi
ACKNOWLEDGMENT vii
INTRODUCTION 1
Background 3
CONCLUSIONS 5
DESCRIPTION OF STUDY 7
Sampling Locations 7
Sampling Techniques and Frequency 7
Analytical Procedures 12
RESULTS 14
DISCUSSION . . . 2Q
Sampling Technique 20
Station Results 20
REFERENCES 23
APPENDIX 25
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LIST OF FIGURES
Number . Page
1 Station Number and Location of Radon Sampling
Stations 8
2 Sampling Equipment for the Outdoor Radon
Collection Stations 10
3 Outdoor Radon Sampler , 11
4 Mean Radon Concentration (pCi/1) for 1974-75
Outdoor Radon Study and 1967-68 U.S. Public
Health Service (USPHS) Study 18
LIST OF TABLES
Number Page
1 Outdoor Radon Study Sampling Stations 9
2 Radon Analytical Sample Results and Station Means
(pCi/1) for the 1974-75 Outdoor Radon Study 15
3 Summary of 1974-75 On-pile and Off-pile Radon
Collection Stations 19
VI
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ACKNOWLEDGMENTS
The authors would like to extend their grateful appreciation
to Mr. Toni Mastrovich, Manager, AMAX Site, Grand Junction,
Colorado; Messrs. Frank McGinley and John Themelis of the
Grand Junction Office, U.S. Energy Research and Development
Administration (ERDA); Messrs: Robert Siek and Al Hazel, Colorado
Department of Health (CDH), Denver; Messrs. G. Harold Langner,
Bruce Peterson, and George Carr, CDH, Grand Junction; and
Mr. J. Tell Tappan of Grand Junction, Colorado. Without their
efforts, support, and understanding this study could not have
been completed. The assistance of Messrs. Fred Johns,
Jim Mullins, and Jerry Branca and the cooperation of the
employees of the Enviromental Monitoring and Support Laboratory
(EMSL-Las Vegas) for maintaining the sampling equipment and
conducting air freight pickup and return is gratefully acknowl-
edged. The assistance of Dr. Robert Kinnison of EMSL-Las Vegas
for the statistical analysis is also gratefully acknowledged.
vn
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INTRODUCTION
Large volumes of solid and liquid wastes are produced
during the uranium milling process since the uranium content of
the ore is usually less than a few tenths of one percent. After
crushing and chemical leaching, the waste volume will usually
exceed the mill feed volume and these wastes contain essentially
all of the naturally occurring .radionuclides that were present
in the ore, including small quantities of unremoved uranium.
The radionuclides present occur in three natural decay chains
headed by uranium-238, uranium-235, and thorium-232.
During the constant radioactive decay occurring in all of
the three radionuclide chains, an inert or noble gas element
named radon is formed. The isotopes formed are radon-219
called, historically, actinon from the uranium-235 chain;
radon-220 called thoron from the thorium-232 chain; and radon-
222 called radon from the uranium-238 chain.
Uranium-235 is normally present in very small quantities
and the half-life of actinon (radon-219) is 4.0 seconds; thus,
there will never be much actinon exhaled from the tailings
material. Similarly, thoron (radon-220) also has a short half-
life (55 seconds), so thoron would not diffuse very far through
tailings material. The daughters of radon are particulates;
thus, upon formation, they will be trapped in the tailings
matrix. Because of the low abundance and very short half-lives,
actinon and thoron are not normally considered to contribute
significantly to the health effects calculated for uranium
mining and uranium mill tailings. Should ores at a particular
site contain significant quantities of thorium, it may be necessary
to evaluate thoron levels.
Radon-222 has a relatively long half-life (3.8 days) and is
formed by the decay of radium-226, a nuclide in the uranium-238
series. As the radon* is formed, a fraction (about 20 percent)
of the total inventory emanates from the radium crystal and can
migrate or diffuse to the surface of the tailings pile. Part of
the 20 percent that is released from the tailings grains decays
prior to diffusion to the surface of the pile. Thus, the actual
radon release is reduced from the radon produced by radioactive
decay both within the tailings grains and decay during transit
Unless designated otherwise, radon will refer to the isotope
radon-222.
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within the pile. Atmospheric conditions and soil moisture
content affect the rate of diffusion through the soil. The radon
that escapes the surface of the tailings pile is said to be
exhaled from the pile and is transported off-site with the
surface winds.
The airborne radon will undergo radioactive decay in transit
and produce short-lived decay products called radon-daughters.
These daughters are called radium-A, radium-B, radium-C, and
radium-C1, (polonium-218, lead-214, bismuth-214, and polonium-
214, respectively). They attach to other airborne particulate
material and become a source of inhalation exposure to population
groups residing in the uranium mill site vicinity.
Radon can diffuse through porous construction materials,
into structures that are in the vicinity of the tailings pile.
Low ventilation rates inside the structure allow the air to age
(produce more radon-daughters by radioactive decay) and a higher
working level* exposure will usually result inside the structure
than in an ambient environment with the same radon concentration.
The alpha particle produced by the decay of radon only
contributes about 0.3 percent of the total alpha energy;
(Tsivouglou et al., 1953); thus, only the alpha energy from the
radon-daughter decay is considered to produce a biological
hazard. Even though radon does not contribute to the exposure,
radon analysis provides a useful environmental screening tech-
nique. If 100 pCi of radon per liter of air are in equilibrium
with its daughters, then the ultimate alpha decay energy produced
will equal 1.3 x 105 MeV or 1 WL. Thus, if a WL guide is estab-
lished, such as 0.01 WL, the guide cannot be exceeded unless the
radon concentration exceeds 100 times the numerical value of the
WL, i.e., 1 pCi/1. In this case, only those locations exceeding
1 pCi per liter radon would have to be sampled to determine the
actual WL exposure.
A study conducted in Grand Junction, Colorado, by the U.S.
Environmental Protection Agency, Office of Radiation Programs -
Las Vegas Facility (ORP-LVF) and the Colorado Department of
Health (CDH), was made to determine what effect, if any, stabili-
zing a tailings pile would have on local radon concentrations.
This study involved the collection of post-stabilization radon
samples at locations used in a previous study when the pile was
unstabilized (U.S. Public Health Service, 1969). Additional
samples were also collected during this study to further document
radon concentrations near the pile. This report presents the
results of this study, which was conducted during the period
April 27, 1974 to April 9, 1975.
Working level (WL) is defined as any mixture of short half-
life radon daughters in a liter of air which will ultimately
produce 1.3 x 105 MeV of alpha decay energy.
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BACKGROUND
In 1966, atmospheric concentrations of radon were measured
in the vicinity of several uranium mill tailings piles. The
sampling program, however, was not definitive due to the limited
number of samples collected (U.S. Public Health Service, 1969).
A larger joint study between the U.S. Public Health Service
(PHS) and the U.S. Atomic Energy Commission (AEC) was begun in
June 1967, in cooperation with the CDH and the Utah State Division
of Health. The 1967 study evaluated the radon concentrations in
the communities of Durango and Grand Junction, Colorado, and
Monticello and Salt Lake City, Utah. The tailings pile in
Monticello had been stabilized .with a soil cover in 1961, and
the other three piles were unstabilized.
Samples were collected from 13 on-pile and 44 off-pile
stations in four communities and the following conclusions were
stated in the report of the study (U.S. Public Health Service,
1969) .
"1. The background radon-222 concentration at Grand
Junction averages 0.83 pCi/liter and is approxi-
mately double the background concentration at the
other three study sites." (Durango, 0.51 pCi/1;
Monticello, 0.34 pCi/1; and Salt Lake City, 0.38
pCi/1)
"2. The tailings at the four study sites are not signi-
ficantly affecting the atmospheric radon concentra-
tions beyond a distance of one-half mile in the
prevailing wind directions.
"3. Of the 44 off-pile stations, exclusive of Station
82 at Salt Lake City, only two exhibited an average
radon concentration (above background) equal to or
higher than the 1 pCi/liter screening value adopted
for this study.
"4. The measured concentrations of radon over the
stabilized tailings at Monticello are less than
those over the other tailings in this study. Deter-
mination of the precise effect of stabilization
would require sampling before and after stabiliza-
tion at a specific site."
Based upon the above conclusions, the following general
conclusions were also stated in the report (U.S. Public Health
Service, 1969).
"1. A technique for taking integrated air samples for
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radon near uranium tailings piles has been developed,
tested, and proven through use in the field.
"2. Atmospheric concentrations of radon in areas near
uranium tailings piles have been evaluated as an
index to radiation exposure of the population. The
results indicate no significant radiation exposure
to the public from this source.
"3. Stabilization and covering of tailings piles in
theory should reduce the emanation of radon from
the piles; however, the evidence for this is not
conclusive from data obtained during this study.
"4. Development of point recommendations to control
public exposure to radon from uranium tailings
piles is not necessary, as no significant public
exposure was indicated by the results of the
study."
Since the completion of the above study in 1968, the CDH,
The PHS, the U.S. Environmental Protection Agency (EPA), .and the
AEC (now the U.S. Energy Research and Development Administration
[ERDA]) have conducted additional studies and surveys in Grand
Junction, Colorado. These studies involved the detection and
location of tailings use in and around structures; the evaluation
of biological hazards from tailings use; and the evaluation of
remedial actions required to eliminate any hazards existing
because of tailings use (Congress of the United States, 1971;
Culot, 1973; and Olson, et al., 1974).
The AMAX Uranium Company (a unit of American Metals Climax,
Incorporated), the operational owner .of the Grand Junction mill
site, submitted a stabilization plan for the mill site to the
State of Colorado in 1970. This plan was approved and the
contouring and stabilization of the pile with six inches of
clean soil was completed in 1970. An irrigation system was
installed on the pile, the covered surface was seeded, and the
area was irrigated during the summers of 1971 and 1972 (U.S.
Atomic Energy Commission, 1974).
In November 1971, the CDH requested assistance from the EPA
for conducting a joint study to determine the radon levels
around the AMAX stabilized pile and compare those levels to the
levels existing before stabilization.
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CONCLUSIONS
1, The original 1967 Public Health Service study concluded that
the background radon concentration in Grand Junction was
higher than the backgrounds at the other three sites
(Durango, Monticello, and Salt Lake City). The mean of the
ambient radon concentrations at sampling locations away from
the pile in Grand Junction (0.74 pCi/1) for the present
study is not statistically different from the 1968 study.
2. The mean annual radon concentration measured above the
tailings pile after stabilization is three times higher than
before stabilization.
3. In the present study radon concentrations above background
were measured only at stations in the predominant daytime
wind direction. Station No. eight, which is at the end of
the pile in the drainage wind direction, is an exception.
The results from the other off-pile stations were not
statistically different from background.
4. In the predominant daytime wind direction, there was a
significant power curve relationship of radon concentrations
to distance out to about one and one-half miles from the
center of the tailings pile. This conclusion, which is
based on a statistical analysis of combined data from both
the 1968 and the 1975 studies, is different from the con-
clusion reached in the 1968 study report, where it was
concluded that radon levels were not elevated further than
one-half mile from the tailings pile.
5. Proper stabilization and maintenance of a tailings pile will
usually prevent the tailings from being eroded by wind and
water, and decrease the gamma radiation from the pile; but
stabilization as currently practiced does not necessarily
decrease the radon exhalation from the pile. Therefore, any
development near a uranium mill tailings pile should take
into account the possibility of an increase in the measured
radon concentrations if the pile is not stabilized at the
time of development.
6. Stabilization, specifically for radon, may be necessary to
minimize unnecessary radiation exposures to persons living
or working near present inactive uranium mill tailings
piles.
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DESCRIPTION OF STUDY
SAMPLING LOCATIONS
The study was designed to allow comparison of the radon
concentration from this study with the radon concentration
collected during the original'1968 Public Health Service study.
Therefore, as many as possible of the sampling locations used in
the previous study were incorporated into this study. Additional
close-in stations were also selected. Permission to sample at
twenty locations was obtained by the CDH. These sampling loca-
tions are shown in Figure 1 and listed in Table 1. Five of
these stations were installed directly on the pile at the same
locations used in the previous study and the electricity and
installation were provided by the AMAX Company. One station
(Number 6) was located about one-quarter mile north of the
center of the pile; five stations (Numbers 8, 11, 12, 16, and
17) were located between one-quarter and one-half mile from the
center of the pile; six stations (Numbers 7, 10, 15, 18, 19, and
20) were located between one-half and one mile from the center
of the pile; and the remaining three stations (Numbers 9, 13,
and 14) were located further than one mile from the center of
the pile.
SAMPLING TECHNIQUES AND FREQUENCY
The sampling system used for this study was essentially the
same as that used for the original Public Health Service study.
A few of the original samplers were available, but were not
operational, and new samplers were fabricated. The sampler con-
sisted of an air mover which pumped air at a constant flow rate
into a flexible 30-liter bag. This sampler was housed in a ply-
wood shed which was large enough to also hold the bag and its
cardboard shipping box. The complete sampling station is shown
in Figure 2.
The air mover was a small diaphragm-type aquarium aerator
pump which was sealed inside a plastic case with holes for the
intake and the outlet (Figure 3). The encased pump was mounted
on the inside of the lid of the plywood box. An in-line filter
was screwed into the intake hole of the encased pump and a
rubber tube (surgical tubing) was connected to the filter and
the other end was routed outside the box with the open end about
three feet above the ground. A precision needle valve was
fitted to the outlet of the pump and the inlet of the bag was
connected directly to the valve. The bag was therefore suspended
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GRAND JUNCTIONjCOLORADO
rv >—' i =1 MILE
[V)- STATION NUMBER
Q-1974-1975 ONLY
- BOTH
<*--PREVAILING WINDS
Figure 1. Station number and location of radon sampling stations
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TABLE 1. OUTDOOR RADON STUDY SAMPLING STATIONS
Station
Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
.17
18
19
20
(a)
(b)
Location
SE Corner, Climax Tailings Pile
NE Corner, Climax Tailings Pile
Center, Climax Tailings Pile
SW Corner, Climax Tailings Pile
NW Corner, Climax Tailings Pile
1005 Winters Avenue
567 S. 15th Street
347 27 1/2 Road
241 N. 4th Street
645 E. 4th Avenue
805 Struthers Avenue
318 27 3/8 Road (b)
325 West Avenue (b)
2795 D. Road
1600 Ute' Avenue
606 S. 9th Street
1000 S. 9th Street
1761 Palisade Street
287 Mountain View Street (b)
2785 Laguna Drive
309 Pitkin Avenue
2005 N. 17th Street
961 Chipeta (b)
469 Sherwood Drive (b)
AEC Compound Redlands
428 28 Road
172 Shamrock (b)
Special Background Station
Distance and
Direction from
Center of Pile
—
—
—
—
1/4 N
5/8 NE
3/8 E
1-1/4 NW
5/8 WNW
3/8 W
1/2 SE
1-3/4 WNW
1-1/8 ENE
3/4 NNE
1/2 NNW
3/8 NW
5/8 SSW
3/4 SE
3/4 ESE
1-1/4 WNW
2 NNE
1-1/4 NW
2 NW
1-1/2 SW
1-3/4 NE
—
5 N
Unable to correlate station location and number from
No tailings on property
1975 Study
Mean Radon
Cone.
(pCi/1)
30
22
15
38
26
6.5
1.3
1.6
0.63
2.0
7.2
0.95
0.77
0.89
0.59
1.1
3.0
0.82
0.63
0.61
—
—
—
—
—
—
—
"""
original report,
1968 PHS
Mean Radon
Cone.
CpCi/1)
...(a)
—
4.7
—
11
—
1.1
0.75
1.8
3.4
0.78
0.69
0.88
0.77
1.3
—
0.84
0.82
0.88
1.1
0.84
0.70
0.78
. 1.1
0.82
0.74
0.79
except for Stations
Study
Old
Station
Number
...(a)
—
12
—
11
—
—
16
32
33
23
24
41
36
21
22 •
—
25
26
35
31
34
42
43
44
45
46
47
3 and 5
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TT
Figure 2. Sampling equipment for the outdoor radon collection stations
10
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Figure 3. Outdoor radon sampler
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from the pump, and as the lid was placed on the box, the bag slid
down inside the cardboard shipping box. The flow rate of the
pump was calibrated by water displacement and the needle valve
was adjusted to give a:flow rate of approximately 8 ml/min.
None of the Mylar bags from the original study were available
and a commercial outlet for Mylar bags could not be located. A
substitute 30-liter Saran bag was located and several were ordered
for testing. Testing showed that the Saran bags retained radon,
so it was decided to use them for the study. During an attempt
to start the study in September 1972, it was found that several
of the Saran bags failed to hold air when used a second time.
After consultation with the manufacturer, it was decided to seal
all four edges instead of just folding one edge and sealing the
other thr.ee; however, the modified bags developed pinhole leaks
wherever the bag had been creased when the bag was deflated.
Since it was obvious that the Saran bags would be inadequate for
reuse and were too expensive to use once and discard, it was
decided to buy a roll of Mylar and sealing tape and fabricate the
Mylar bags. These bags proved to be reasonably durable and the .
study was re-started in April 1974.
Each sample was collected over a 48-hour period in order to
include two complete diurnal cycles. A sample was collected at
each station.once every three weeks for one year. This was done
to minimize any bias created by daily and seasonal meteorological
variations. Due. to limited 'analytical equipment, it was not
practical to collect samples at all 20 locations simultaneously
since only eight samples per day could be concentrated for
analysis. The five samples collected on the pile had high enough
levels of radon that they did not have to be concentrated.
Therefore, during the first two days of the sampling week, the
five on-pile locations and seven other locations were sampled.
When these samples were picked up, the sampling at the other
eight locations was started. At the beginning of each sampling
period, the flow rate was checked. At the end of the sampling
period the cardboard boxes with the inflated Mylar bags inside,
were removed from the sheds. The bag was taped to the inside
of the box arid the box was taped shut. The samples were air
freighted to Las Vegas on the same day that they were picked up.
ANALYTICAL PROCEDURES
Since the samples were air freighted from Grand Junction to
Las Vegas on the day they were removed from the sampling stations,
they were available for analysis the following day thus keeping
radon decay to a minimum. The samples were analyzed by concen-
trating the radon and counting in scintillation cells as described
in EPA's "Handbook of Radiochemical Analytical Methods" (Johns,
1975). An aliquot of .the sample was transferred to a gas separa-
tion apparatus where it passed through traps to remove carbon
dioxide and water vapor, and then passed through two charcoal
12
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traps at dry ice-acetone temperature to collect the radon. After
the sample had passed through the apparatus, the dry ice-acetone
(-80°C) bath was removed from the traps and a furnace preheated
to 350°C was put around the traps. The radon was then emanated
from the traps with helium and collected in scintillation cells.
The radon and daughters were allowed to reach equilibrium (approxi
mately 4-1/2 hours) and then the cell was counted for 30 minutes.
The samples from the pile contained radon concentrations high
enough to allow an aliquot of the sample to be transferred
directly into the scintillation cells. The radon was allowed to
reach equilibrium with its daughters, and then the cell was
counted on a photomultiplier tube for thirty minutes. The count-
ing and sampling information were coded for computer processing.
The computer printout presents the radon concentration in pCi/1
and also shows the two-sigma counting error (Appendix A). The
air volumes were corrected for average ambient conditions in
Grand Junction (638 mm Hg and 11°C).
13
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RESULTS
This study included 17 sampling periods between April 27j
1974 and April 9, 1975. The September 1972 data that were col-
lected while originally trying to get the study started were not
included in this study, because of the desire to sample over one
continuous year. During the seventeen sampling periods, 357
samples were collected at the 20 stations, but only 329 samples
were analyzed because some of the bags leaked in transit or were
lost in transit. In four cases, two samples were collected in
the same sampling period; they were averaged, resulting in 325
data points. The complete data for each sample are listed in
Appendix A.
The radon concentration of each sample and the mean annual
radon concentration for each station are shown in Table 2. Eight
stations had 17 samples to average for the annual mean, nine
stations had 16 samples and the other three stations had only 15
samples. In Figure 4, the mean annual radon concentrations of
these stations are also shown and compared to the 1967 concentra-
tion at the duplicated stations.
The 20 stations in this study have been combined into four
groups which are shown in Table 3: (1) on-pile, (2) within one-
half mile of pile, (3) between one-half mile and three-quarters
mile of pile, and (4) more than three-quarters mile from the
pile.
15
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TABLE 2. RADON ANALYTICAL SAMPLE RESULTS AND STATION
MEANS (pCl/1) FOR THE 1974-1975 OUTDOOR RADON STUDY,
Samp le
Period
1
2
3
4
5
6
7
3
9
10
11
12
13
14
15
16
17
Number
Mean ±
Percent
Year Sample
Start
4/27
4/29
5/18
5/21
6/08
6/10
6/24
6/28
6/30
7/03
7/20
7/22
lilt,
8/06
8/10
8/12
'
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TABLE 2. (continued) RADO.N ANALYTICAL SAMPLE RESULTS AND STATION
MEANS (pCi/1) H1R THE 1974-1975 OUTDOOR PvADON STUDY,
St.'iLion Numbor
Sample
Period
1
" 2
3
. 4
5
6
7
3
9
10
11
12
13
14
15
16
17
Number
Mean ±
Percent
Yuar Sample
Start
4/27
4/29
5/18
5/21
6/08
6/10
6/24
6/28
6/30
7/08
7/20
7/22
7/24
8/06
8/10
8/12
£ 8/19
S 9/01
9/03
9/09
9/21
9/23
9/30
10/13
10/15
10/21
11/02
11/04
11/11
11/22
11/24
12/02
12/15
12/31
1/04
1/07
1/14
1/25
1/27
2/03
m
£ 2/16
^ 2/18
2/24
3/08
3/10
3/17
3/29
3/31
4/07
of Samples
1 Sigma Error
Variance
Sample
Stop 8 9 10 11 L2
4/29 1.2 0.21 1.3 ' 4.7 0.62
5/01 ...
(b)
. 5/20 0.86 NS 0.87 . 3.1 0.46
5/23
6/10 0.66 0.56 2.4 ' 7.1 0.81
6/12
6/26 ' '
6/30 1.1 0.49 .3.4 9.3 0.77
7/02
7/10
7/22 0.39 0.39 NS NS 0.68
7/24
7/26 3.6
8/08 1.2 'a>
8/12 0.57 0.52 0.80 ' 3.6 0.47
8/14
8/21
9/03 0.95 NS 1.4 3.3 0.51
9/05
9/11 0.49
9/23 1.4 NS 17 1.6
9/25
10/02 0.89 5.3
10/15 1.9 11
10/17
10/23 O-50 NS 0.90
11/04 1.9 0.58 0.97 11 1.5
11/06
11/13
11/24 1.1 0.68 1.7 5-6 °-82
11/26
12/04
12/17 2.2 0.78 2.2 7a °-91
1/02
1/06 4.1 0.77 2.0 6'7 1-6
1/09
1/16
1/27 3.8 1.4 2.8 " 2-0
1/29
2/05
2/18 2.6 0.28 5-8 1-1
2/20
2/26 3.6
3/10 0.63 0.43 0.43 °'44 '
3/12 1-2
3/19
3/31 1.7 0.53 8-9 1-0
4/02 0.68
4/09
17 16 15 17 17
1.6 ± 1.1 .63 ± 0.34 2.0 ± 1.3 7.2 ± 4.1 .95 ± .46
69 54 65 57 48
13 ' 14
0.41 0.98
0.89 NS
1.1 0.85
0.32 0.63
0.24
0.38
NS
2.1
NS 0.61
0.46
0.80 0.52
1.5 0.75
0.94 0.35
1.7 1.9
0.93 1.2
NS 1.0
1.5
0.37 0.53
0.46 0.89
0.41 NS
0.49
0.24 0.54
16 16
.77 ± .48 .89 ± .<
62 ' 55
(a) Average used for samples collected in s;uuc s.-unplinj; period.
(b) NS - No sample
1.7
-------
TAHl.r, ?.. (continued) RADON ANALYTICAL SAMI'I.K HKSULTS AND STATION
IIKANS (|iCI/l) I'CW Till'. l')74-l<)7'> OUTDOOR ItADON STUDY,
Scat ion Numb^ r
Sample Year Sample S;imple
Period
1
2
3
4
5
6
7
8
9
10
11
12
13
14
r^.
S
15
16
17
Start
4/27
i 4/29
5/18
5/21
6/08
6/10
6/24
6/28
6/30
7/08
7/20
7/22
7/24
8/06
8/10
8/12
8/19
9/01
9/03
9/09
9/21
9/23
9/30
10/13
10/15
10/21
11/02
11/04
11/11
11/22
11/24
12/02
12/15
12/31
1/04
1/07
1/14
1/25
1/27
2/03
2/16
• 2/18
2/24
3/08
3/10
3/17
3/29
3/31
Stop
4/29
5/01
5/20
5/23
6/10
6/12
6/26
6/30
7/02
7/10
7/22
7/24
7/26
8/08
8/12 .
8/14
8/21
9/03
. 9/05
9/11
9/23
9/25
10/02
10/15
10/17
10/23
11/04
11/06
11/13
11/24
11/26
12/04
12/17
1/02
1/06
1/09
1/16
1/27
1/29
2/05
2/18
2/20
2/26
3/10
3/12
3/19
3/31
4/02
15 16 17 18 19 20
(b)
0.90 . 1.4 1.7 US 0.67 0.93
0.51 1.8 6.0 0.50 0.036 0.57
0.56 0.90 3.1 0.82 0.54
°-43 (a)
0.38
0.46 0.54 2.6 0.34 0.31
0.70
0.45 1.2
0.46 0.48 0.45 0.36
0.55 0.74 2.4 0.50 0.39 0.50
NS 1.1 0.67 NS
0.35 2.2 0.92
0.53 0.86 4.0 0.89 0.49
0.54
1.8 0.96 0.96
0.66 3.3 0.56
1.2 0.43
1.3 2.7 5.2 1.1
0.044 7.6 1.2 i i
3.0 2.7
... _ . — - " NS
0.90 1.2 NS 1.1 0.84
NS NS 1.2 0.94 0.97 0.62
0.14
NS 1.1 1.4 0.40 0.63 0.43
0.56
0.70 0.84 2.1 0.80 0.67 0.67
0.44 0.55 1.1 0.33 0.49
0.60
0.46
0.20 1.0 0.27 0.46 0.39
4/07 4/09
Number of Samples 16 17 16 16 16 15
Mean ± 1 Sigma Error .59 i .23 1.1 ± .80 3.0 ± 1.9 .82 ± .57 .63 ± .29 .61 ± .25
Percent Variance „ 73 63 7Q 46 41
(a) Average used for samples collected in same sampling period.
(1)) NS - No sJimulo
-------
GRAND JUNCT ION,COLORADO
WNW
WSW
ENE
1967-1968
SCALE:13/8"=1 MILE
QJ-1967-1968
-<- PREVAILING WINDS _________
Figure 4. Mean radon concentration (pCi/1) for 1974-75 outdoor radon
study and 1967-68 U.S. Public Health Service (USPHS) study
19
-------
TABLE 3. SUMMARY OF 1974-1975 ON-PILE AND OFF-PILE
RADON COLLECTION STATIONS
Concentration
Number of
Location Stations
On -pile
fal
Near-pile^ }
Near-pile\ *
Near-pile^ '
Other(d)
°ther(e)
5
4
6
6
3
8
Number of
Samples
81
66
101
95
48
128
of Radon
Average
26
3.
3.
0.
0.
0.
0
4
99
76
74
8.
0.
0.
0.
0.
0.
(pCi/1)
Range
2 -
14 -
14 -
04 -
21 -
04 -
66
17
17
5
2
2
.3
.1
.7
(a) Near-pile stations same as 1967-1968 near-pile locations
(Nos. 8, 10, 11, and 16)
(b) Near-pile stations to 1/2 mile from the center of the pile
(Nos. 6, 8, 11, 12, 16, and 17)
(c) Near-pile stations from 1/2 to 3/4 mile from the center of
the pile (Nos. 7, 10, 15, 18, 19, and 20)
(d) Stations greater than 3/4 mile from the center of the pile
(Nos. 9, 13, and 14)
(e) Other stations included in 1967-1968 other locations
(Nos. 9, 12, 13, 14, 15, 18, 19, and 20)
20
-------
DISCUSSION
SAMPLING TECHNIQUE
. In general, the sampling technique was good, but a number of
bags failed during the study. The failures occurred either
during sampling or during transit. In either case, an attempt
was made to collect another sample from the station where the
sample was lost. This was not possible in all instances, but no
station had less than fifteen samples to average for the annual
mean radon concentration.
STATION RESULTS
The data from each station for each year were plotted on
normal probability plots of distribution. From these plots it
was decided that the data are best described as following a log-
normal statistical distribution, which is consistent with the
findings on radioisotopic data. Since most statistical tests
assume normal distribution, it was necessary to use the loga-
rithms of the radon values in the tests.
The data were analyzed using the analysis of variance and
covariance (Kinnison, 1976). The analysis of variance is a
general purpose statistical technique that tests for the exis-
tence of any unknown pattern of responses within a data set.
The first analysis of variance test considered all the data
from all the stations for both years, and showed a significant
difference between the data for the years of 1968 and 1975, a
significant difference between stations, and a significant
interaction. Further tests were conducted on sub-groups created
by separating the data into on-pile and off-pile groups, in order
to find the source of interaction.
The analysis of variance of the on-pile stations showed a
significant increase in radon levels from 1968 to 1975, and a
significant difference between the on-pile stations. The mean
annual radon concentration for the five on-pile stations was 26
pCi/1 for 1975 (Table 3) compared to 7.8 pCi/1 for 1968 (Table
4). The exact cause of this increase of radon concentration by
a factor of three after stabilization of the pile cannot be
determined. In addition to the stabilization of the pile, a
number of changes affecting the tailings pile had occurred
between the original study and this study. Before the pile was
21
-------
stabilized, it was re-contoured which could have changed the
distribution of the tailings and high radium content slimes in
the pile, the depth of tailings, and the surface area of the
pile. During the original study, the mill was active and portions
of the surface of the pile were covered by a pond; but during
this study, the only moisture the pile received was natural
precipitation and occasional irrigation. The roots of the vegeta-
tion used to cover the pile probably penetrated the soil cover
and went into the tailings, thus creating channels for radon
movement. During the period of this survey, tailings which had
been removed from homes as part of the remedial action and on-
going building permit program were brought back to the millsite
and placed in a repository at the east end of the stabilized
tailings pile. The volume of these tailings was small compared
to the original pile, and probably did not contribute signifi-
cantly to the observed radon levels.
Any or all of these changes could account for some of the
increased levels of radon detected on the pile during the second
study. It is not possible to determine exactly what caused the
increased radon levels, but the most likely cause appears to be
the decreased moisture content of the pile which would change the
diffusion coefficient and allow more radon to diffuse to the
surface.
The analysis of all of the data for the off-pile stations
showed no significant differences in radon levels between 1968
and 1975, except for station number eleven. The same analysis
showed that there were significant differences between stations.
Station eleven is located very close to the end of the tailings
pile in one of the major downwind directions. Since the radon
concentrations on the pile increased significantly, it was
logical that the close-in stations in the downwind direction
would also have significantly increased radon concentrations as
was the case with station eleven. As shown in Table 1, stations
six and seventeen were close-in stations which had high radon
concentrations during the 1975 study, but unfortunately they.were
not used in the 1968 study so no comparison can be made to see if
the radon concentration increased.
Examination of the off-pile data suggested that the stations
fell into groups depending upon compass direction and distance
from the tailings pile. Several trial plots of the data sug-
gested a linear relationship of radon concentrations to distance
from the pile on log-log graph paper; this is equivalent to a
power curve relationship. This relationship was incorporated
into the analysis by including the logarithm of distance from the
pile as a regression variable for the analysis of covariance.
The comparison of stations in different directions was done
by dividing the stations into eight groups on the basis of 45-
degree sectors from true north. This comparison showed that for
the sectors from 0 to 270 degrees from north (clockwise) there
22
-------
was no power curve effect due to distance and the stations were
considered as members of one population with a mean radon con-
centration of 0.71 pCi/liter. An exception is station number
eight, which has radon concentrations greater than background.
This station is very close to the end of the pile and lies in the
direction of the drainage wind from the pile. The data from the
two sectors from 270 to 360 degrees showed a significant power
curve relationship of radon to distance. There was also a
significant difference between the two sectors and also between
the sectors and the other data. The power function extends to
about one and one-half miles from the pile. This is in the
downwind direction during the predominant daytime winds. Because
of minimal data in the southerly direction, several sectors had
to be combined for the analysis of covariance.
23
-------
REFERENCES
Congress of the United States, Use of Uranium Mill Tailings for
Construction Purposes, Hearings before the Subcommittee on Raw
Materials of the Joint Committee on Atomic Energy, Ninety-Second
Congress, October 28 and 29, 1971, U.S. Government Printing
Office (Stock No. 5270-1395), Washington, D.C. (1971).
Culot, M.V.J., H.G. Olson and K.J. Schiager, Radon Progeny Control
in Buildings: Final Report EPA Grant No. R01EC00153, Colorado
State University, Fort Collins, Colorado (May 1973).
Johns, F. B. (ed.), Handbook of Radiochemical Analytical Methods,
EPA-680/4-75-001, Las Vegas, Nevada, February, 1975.
Kinnison, R. R., Memo to R. L. Douglas, (1976), Review of Grand
Junction Radon Data, U.S. Environmental Protection Agency,
Environmental Monitoring and Support Laboratory - Las Vegas,
September 9, 1976.
Olson, H.G. and J.T. Tappan, The Sealant Demonstration Program,
Colorado State University, Department of Mechanical Engineering,
Fort Collins, Colorado (September 1974).
Tsivouglou, E.G., H.E. Ayer and D.A. Holaday, "Occurrences of
Radon and its daughters", Nucleonics, Vol. 2, pp 40-45, 1953.
U.S. Atomic Energy Commission, Phase I - Reports on Conditions
of Inactive Uranium Millsites and Tailings in the Western United
States^Grand Junction OperationsOffice,Grand Junction,
Colorado (1974).
U.S. Public Health Service, Evaluation of Radon-222 Near Uranium
Tailings Piles, DER 69-1, Rockville, Maryland, March, 1969.
24
-------
APPENDIX A
SAMPLE COLLECTION AND ANALYSIS INFORMATION
25
-------
GRAND JCT COLOPADO 2?2*N KfbULTS
COI OPAOO PEPOWTFt) 7S/07/08
...... •.._-.„ . ...... ANALYSIS—•-HF;SULt----2SlGMS---UNiTS
GRAND JCT COLO SP CORNER OF PTLT ??.?*^ ^X^0.1 ?«3JTOO PC1/L
?«T 02'iT1 "or?" !)!>""« ~'7 74
"orr'T lii""^*'7"<»
§if~C"0PNPR""6F""PiLE ". ~ 2?" .
077 OS 8 P7 2
o£bZ~ T 7" ~ " '""" ~ " "
»>01 ON- 0^ OH 7
-------
JCT COLORADO ???&N RESULTS
REPORTED 75/07/08
'"C^LO" srcoPNEP: OF PILE 22TEN2.4rO~TZiSTUfiPcT/t
25 0240 077 05 8 97 ?.
"ni7.T3~^W65~0~OT O.N- 07 ?4 74 1350
_ SIZE- OFF- 07 ?6 74 1135
GRAND JCT COLO SE CONNER UFPJLE ^??^ _?_!^E_?! ll2L°^_ PilI_/L
ODR06 01 OfJ- 1? 15 74 0925 "
_SJZF- OFF- 12 17 74 1015
GRAND JCT COLO SE CORNER OF PILE 222RN 3^^J 3.1FOQ PCI/L
14I70I OOR11 001 ON- 01 04 75 1010
5T7F-" "'OFF-' "01 06 75 0935 "~
GRAMD JCT COLO SE-CORNER Of olLF; ?2?"N 4.6ED1 3,5EOO PCI/I
?5 0?40 077 05 R 97 ?
-T4Zini 00'R'1'4"""'OI" - ON- r.l ?5 75 0950 ""~ """ "
SIZE- OFF- 01 27 75 1010
GRAND JCT COLO SF CORNER OF e»ILf. 222RN 407K01 3.5FOO PCI/L
"25"0240 077 05 6 97 ? -- - —"
14?901 ODR15 001 ON- 0? 16 75 1010
OFF- 0? in 75 1130 '
27
-------
JCL COLORADO 222RN RESULTS
COLORADO REPORTED 75/07/08
'ANALYSTS—~RESULT—--2S1GMA---UNIT
<
sE ""c6'RNl;P~or""PiLE ........ ........ ""' 222"SN ~ T.TEOI SVTtfRF PCI/I
25_ 02^1)^77 OS 8 97 2 __ ____
143201 pOR 16 00 \ ~ ON- 03 08 75 0955
____ SIZE- ... ................... .OFF- 03 10 75 1210 _ _._ _ _______ _____________ ......
GRAND JCT COLO SE CORNER OF PILE 222RN 3?7E01 3.1EOO PC I /I
"~~"" ~
.
144001 ODRJ7 001 ON- 03 29 75 1040
OF?- T3 131 75
PC171
25 0240 077 05 8 97 2
___ _
130594 QDROl 002 ON-~
SIZE- OFF- 04 29 74 0932
JJRAND JCT COLO NE CORNER OF PILE _ _ _222«N .L»*EOJ_: U9EOO PCI/L
25T240" OT1TW 8 97 Z
131410 ODE02 002 ON- 05 18 74 J 043
SIZE- OFT^~fV5~?0"T4 095T~
PcT7i
2? 0240_077 05 B 97 ?
"l3l9"55"~07bR03 002 ON-" ~#6""Oft "t'4 114S " "' " "~
SIZE- OFF- 06 10 74 1150
GRAND JCT COLO NE CORNER OF PILE 222KN 1.6E01 2.0EOO PCI/t
~UT7"T5""8 '9"T~ ? """"
QOR04 OQ2 ____ ON- 06 ?H 74 1445 __ ____ ____
" OFr-"06 30 74 Ti"45~" ~~ "
JCT COLO Nf CT3RNTR or PILTT ??2fRR 2T4TTJT ?.«>fu« PTI/l
25 0?AO 077 05 B 97 2 _ _
00«05 0~6I ON- 07 ?0 74~l400 ~
SIZE- OFF- 07 ??. 74 U45
_ JCT_COLO ^_CQRNER OF PILE _________ 222WN ____ 2V3E01 2.3EOO PC!/l
?5 024U 077 Ob 8 97 ?
133236 OOR05 00? ON- 07 ?4 74 1355
^ 07" ?6 74 1 140
OF PILE 222RM1,9EOY 272r(T9PCT/l
25 0240 077 05 8 97 2
SIZE- OFF- 08 12 74 1055
GRAND JCT COLO NE CORNER OF PILE 222^N 2.5E01 2.6EOO PCI/I
-25-8240 077 05 6 97 ^
1341flfe QDK07 002 ON- O1^ 01 74 0930
SUF- ~ OFT-" 09 "03 74 "ft9^0
„ - 28 ~ —
-------
GRAND JCT COLORADO 2P2RN RESULTS
REPORTED 7=1/07/08
COLORADO
GRAND JCT COLO NE CORNER OF ~PTLY
29 0340 077 05 6 97 2_
a34747 OOROfiHSOZ ON- 09 21 74 "1052"
SIZE- OFF- 09 33 74 0957
-ANALYSIS RESULT-
4.1E01
GRAND JCT COLO NE CORNER OF PILE
25 0240 077 05 6 97
136 ODR09 06?
222RN
2.9E01
SXZE-
«T
ON- 10 13 74 1000
OFF-- 10 re 7
-------
COLORADO
REPORTED 75/07/08
GRAND JCT COLO CENTER OF PILE
25 0240 077 058 97 ?
T30S9~5 bDRoTooS W- 04 27 74
SIZE- OFF- 04 29 74 0937
•A NAL VS1S-—RE SUL f'----2SIGMA—UN IT «•
222RN172E01r*8JEOSPcT/l.
GRAND JCT COLO CENTER OF PILE
25 024TT*7T 05 8 97 T
131*11 ODR02 003 ON- 05 18 74 1052
-" 05 27 2
133656" 00^01T~0~03 T ON- OS Id 74 TOlO
SIZE- OFF- 08 12 74 1115
1 • 6EiOT PcT/T
GRAND JCT COLO CENTER OF PILE
25 0240 077 OS 8 97 2
134187 OOR07 003
222RN
1«4E01
1.9EOO PCI/I
ON- 09 01 74 0910
arQ™0"3"~ 74
GRAND TCT'COCO rERTFff'DF PILE
35 0?40 077 05 8 97 ?
OH-~0"9~21741
1.9EOT
PC 17!
31
S1ZE-
OFF- 09 23 74 0953
GRAND_JCT COLO CENTER OF
135137 OOH09 003 ON- 10 13 74
222RN
1.7EOI
2.1EOO PCI/l
30
-------
GRAND JCT COLORADO 222RN RESULTS
COLORADO REPORTED 75/07/08
GRANO JCT COLO CENTER OF PILE
£S 0240 077 OS 8 97 ?
H^5479 OOP 10 003 ON- 11 0? 74 0900
SIZE- OFF- 11 04 74 1010
GRAND JCT COLO CENTER OF PILf
25 0240 077 09 8 97 2
HE005 OOR11 003 ON- 11 22 74 0930
SIZE- OFF- 11 24 74 0945
GRAND JCT COLO CENTER OF PILE
23 ©240 077 05 8 97 2
U&H003 ODR12 093 ON- iZ 15 74 0920
SIZE- OFF- 12 17 74 1035
GRANO JCT COLO CENTER OF PILE
H&703 OOR13 003 ON- 01 04 75 1005
5XZE- OFF- 01 06 >5 0945
25 0240 077 85 8 97 2
SIZE- OFF- 01 27 75 1005
ORAND JCT COLO CENTER OF PILE
S42903 OOR15 003 ON- 02 16 75 1005
SIZE- OFF- 02 18 75 1135
GRAND JCT COLO CENTER OF PILE.
25 0240 077 05 8 97 ?
B43Z03 OORI6 003 ON- 03 08 75 0950
SIZE- OFF- 03 10 75 1220
GRANO JCT COLO CENTER OF PILF
25 0240 077 05 8 97 £
144003 OOR17 003 ON- 04 07 75 0945
SIZE- OFF- Q<« 09 7b 104b
flffSND" JCT COLTT 5W CORNER OF PILF
25 0240 077 OS 8 97 ?
)TJIIdl64b OHR01 004 ON- 04 W 14 0950
SIZC- OFF- 05 01 74 1020
GRANO JCT COLO SW CORNER OF PJLr
13H13.00R02 004 ON- 05 18 74 1123
SIZE- OFF- 05 ?0 74 1028
>•»— AtJAI Y *i T C-.««— UF
-------
GRAND JCT COLORADO 2?2RN RESULTS
COLORADO REPORTED 75/07/08
•ANALYSIS RESULT ?SK>MA UNIT'
GRAND JCT COLO SW CORNER OF PILE
!_5_P2*p 077 05 8 97 ?
131947 66«03 004 ON- 0 6
. SIZE- OFF- 06
06 74 l<>00
10 74 1125
_ .J_CT_C9_LO 5W CORNER OF
"25 "0?40 077 05 8 97 ?
11?494 OOR04 004 ON- 06
"~"ST?E-™ '" OFF- 06
PILE
28 74 1505
10 74 1135
JCT cOLO sw CORNER of
2? 0240 077 05 8 97 2
T3321o"bO"So5™6~64 ON-" 07
SIZE-OFF- 07
GRAND JCT COLO $W CORNER OF
~25 0240 0?765 "8 97 i»
133338 OOR05 004 ON- 07
—SIZE-' OFF- 07
PlLK
20 74 1415
2? 74 1125
PILE
JCT COLO SW CORNER OF
25 0?40 077 05 8 97 ?
I3365t 6f)P06 004 ON- 68
SIZE- OFF- 08
24 74 1415
26 74 1155
PILE
10 74 1000
12 74 1110
GRAND JCT COLO SW CORNER OF PILE
_I34_I_95 OOP07 004
SIZE-
ON- 09
OFF- 09
JCT CTOL~a"5w"CORNEfi OF
25 0240 077 05 8 97 2
"" oDPOH""tf05 ON- 09
SIZE- OFF- 09
01 74 0920
03 74 1615
?1 74 1000
?3 74 0948
GRAND JCT COLO SW CORNER OF PILE
222HN
PCI XL
222KN
3.9E01
3.2EOO PCI/l
NO-SAMPLE
222HN
2.6E01
2.6EOO PCI/L
2.7E01
2Y5F.OO PCI/l
NO-SAMP
135138 OD&09 004
517F-
(IN- 1C
OFF- 10
'GRAND'" Jf.T COLO SW CORNER" OF
?5 0?4C) 077 05 8 97 ?
T354TTO OOP 10 U flT4" oM- 11
SIZE- OFF- 11
GRAND JCT COLO SW CORNER OF
~2T~6~?4"0" 67T 05 fi 97 2
141006 O/K-ll 004 ON- 11
slTF- " OFF- 11
13 74 1040
15 74 1025
par
0? 74 "5945
04 74 10<>C
7<» 0940
74 0955
222KN
6.2E01 4.0EOO PCI/I
3 o 9E 01 " "3 . 2F(TO " PCI /i
2.7EOO PCT/I
32
-------
OPAND JCT COLORADO ..222HM PESULTS
CpLOPAOO _ REPORTER 7^/07/08
«-»--«-.——.«,-— --- .. ---- .«, --- — — . .-..- -ANALYS I S--«RESULT-«--2S f CVMA---UN t T -'
'' COLO""SW''~COPNF:R'' OF"PI In 2~2T&N 27$E6T ~2T&Ftf7j PcT/i.
0240 077 05 8 i 97 2
oORi"-?""6o4" " "' "ON- 12 15 74 6940 """ ....... "~" ........ """ " ............
SIZE- OFF- i? 17 74 1030
GRAND JCT COLO Stf CORNER OF PILF. NOSAMPLF _
njTTnjs^r^T 2 " ~ .........
OOP 13 004 ON- 01 25 75 1015
SITE- ......... "" ......... ~ OFF- 6127 75 0955 ....... ~ " " ...... ............ ""
JTT COLO" ^W C.CRNEfi OF PILE" " ' " 222W SoBETOI TdFOO " PCl/l
25 0240 077 05 8 97 2
T*2334"~0?3S14-3ff4 ----- ....... 6N-"""02"ff3"75~TTrZ5' -------------------------- ---- --------- ........
SUE- ___ __ OFF- 02 05 75 0950 _____
GRAND JCT COLO SW CO«NFR OF PILF. 222HN 4.2F01 303EOO Pri/l
Z5~V?i.D 077 05 g «7 2 -------
S42904 OOR15 004 ON- 02 24 75 1055
STTF^"- — -------------- ^rr- 07 26 75-1005 ------------------------------------ " --------------------
{5ffA'MO"".TCr 'COL 0"5W CORNER OF' PILF. 222RN 3V*EOI"" T.OEOO PCI/L
25 024e 077 OS 6 97 2
141^04 OOPl^ 004 ON- 03 17 75 U05
SIZE- ____________________ OFF- 03 19 _75 U>45___ ____________________________________________
GRAND JCT COLO SW CORNFR OF PILE 222«N l.flFHl 202F.OO PCI/1
25 0240 077 fi* 8 "97" 2 " ....... """"" """ ..... "~" .........
44004 OOP 17 004 ON- O-i 07 75 0950 __
" ................... ~""dFF-"04 09 75 1046 - "~"
cot'QTTjvf COPNTP OF PILE ~ ------- ..... """7?7RFr~ ............ i . ^roi ?73nyo FCT'/I
25 0240 077 05 ft 97 ?
130597 "OriRO 1^ 005 ON- 04 27 74 '1040 ..... """ ~ ....... " ........
SIZE- OFF- U4 ?9 74 0955
OPAfv'O JCT COLO NW CORNFW OF PILF. 222HN 1.7F01 __f^f0P PC I /I
75~-074r~07? IT5~ff~9T ?. " ~ '.
131412 OOP02 005 ON- 05 18 74 1115
517?.=""" " ....... ~ ...... " ..... OFF- 05 20 7A lOTB" ..... ...... '" ...... ' ..... " .......... " ..... .
GRASD "JCT COLO NW~ CORNER OF PILE 222PN PVIEOI ?V3TO;0'" "PCT/l
25 0?40 077 05 8 97 2
03"ITD5- ........ ON- "36 08 74 1205 ~ ........ ..... "" " ........ .....
SJ7E- OFF- 06 10 74 1130
JCT COLO NW COHNKR OF PRP NO-SAMPLF
25" 0240 077 05 '8 Q7 ? "
133221 ODR05 005 ON- 07 20 74 1420
STIE- "OFF- 07 '22 74 II JO ...... """ " ........... """ .........
33
-------
GRAND JCT COLORADO 222RN RESULTS
COLOWADp RFPORTEO 75/07/OB
.".—^...—.—..—— —- ANALYSIS—RESULT-—2SIGMA —
GPATJo""Jcf"COLO NW "CORNER""OF"Pi LE 22~2RN ~a.iJtol 2.4F.ooPCT/i
?.? •?*." ?77 os ? 97 *
33?34 ohPGS cos ON- 07 ?4 74 1425 ""
OFF- 07 26 74 1200
_. COLOJNW CORNER OF PILK_ 22ZKN _ l.?EOl__ 3.3F.-01 PQt/L
25 0~2~40 077 65 8 97" ? " 7 •
13365ft QOP-06 005 ON- 0« 10 74 0945
' r»rr- o« 1274 1045 " ~~
COLO~M COPNCR Or PlLt! 222RR 1.9EDT 2.3EOO" "PC1/L
25 0?40 077 05 8 07 ?
~T341B*T ofTPHFTinre" dW"-"?'9""01 74 "0850
SIZE- OFF- 09 03 74 0955 __ _
GRAND JCT COLO NW CORNER OF PILF. ?22*N 3.8E01 3«?EOO_ PCI/L
•?'5~5'2i"0 677 65 8 97 2
134750 ODR08 005 ON- OW 21 74 1125
5TZT- orr-~&g P3 74 1025 ™
"SRANn""JCT COLO Kiw COPNtW Of PRr 22"2RN" 3.6T01 3VIFOO Pcf/l
25 0?40 077 05 8 97 ?
135139 6f)«69"o65 ON- 10 13 74 V655 """ "~
_S_I ZE_- _ OFF- 10 15741040
C7RAMD JCT COLO MW COHNFP OF PILF _
?5T?40 677 05 897 ? "~ ~ ~ ". ""•"
1_1?.4?1 ofl.??V °95 ow~ U 0? 7"» 093°
si?r- ""OFF- 11 04 74 iu25 " "" "" r
"6if7rfj!r7CT~c"(yar'Nw—cTiPTirft or PILE —2?zw " I.TFOT 2nrmr~-pCT7L
25 0240 077 05 8 97 £
i«rnro»7'oOp:ir"o"6S'" ON- 11 2? 74 ovso ~ "~
SIZE- OFF- 11 24 74 1000
GRAND JCT COLO NW COPNF.P OF PIL^ 222«N 3.7E01 ?«7f°° _ PCI/l
•?5~C7«rn~~077 "05 8""0~7 ^ ~ " " "•"" "~
141405 OOP 12 "05 ON- 1? }5 74 093S
""SI7F.- " OFF- 1? 17 74 1030 "
"GRAND JCT COLO N'v roRN^fc OF PILL ?22RN 3.5F.01 3.1TOO " PCT/I
25 0?40 077 OS 8 «7 <>
14X705 5DR131RJ5 ON- 01 04 75 1020 " " ~~~ ."
SHE- ?IrJ^H ?6 7? ^55
toAW jC!_g°*-g NM CORNER OF PILE 222RM S,2E51 3.7C90 PCI/t
•gg 0240 977 55 8 9~7 2
142305 OOR14 005 ON- 01 25 75 1005
-------
GRAND JCT COLOPAOO 2??RN HESULTS
___ _ _ _____
£R ANfi"~Dc T" ~CO~LO ~N iTcoWE % OT~ "P" I LC 22"ZW 277E 01 ~2T6TQO P'cT/T
i?5 OJ?40 077 05 8 97 2
I4?^05~OT)P15~P9? ON- 0? 16 7C/ 1026 ........ " ...... .........
SIZE- OFF- 0? 18 75 1150
GRAND JCT COLO NW CORNER OF PlLf: 222RN _ Q,2EQO ioSF.QQ PCl/L
g™ ~ ..... "" ~~"~
143205 OOP16 005 ON- 03 08 75 1005 ____
" ~' '~
~ PCT/I.
25 '0240 077 05 8 97 ?
6N=~TJ3'"7'9 75 TITO
SI7E- OFF- 03 11 75 1100
133222 OHR05 006 ON- 07 20 74 1430
OFF- 37 ?? 74 1340
OR AND JCT COLO 222KN 15.9EOO U9F-01 PC I /I.
?5"~0'^A'C""0'77~0"5"~B~"«J'7 ?"~ "" " ......... ....... " ........... """ ..... ...........
I305*»ft 00?*0l P06 ON- 04 ?7 7'+ 1105
JCT COLT*' "???TM "3V3E1W" " 1T5E-OT"" P'C"I/L
25 024 <> 077 05 8 «7 p
" ..... " ...... 0"fl-'65 IB 74 113? ......... " ...... "" ................... ........ " ............. ......
OFF- 05 ?0 74 1039
GRAND JCT COLO -??2HN 5.0E.OO 1.7E-01 PCl/l.
?«;- o?t-r O7r 05 "F 9T •?• ...... • • •••" ...... " ...... •" ....... ...... • : ......
131949 DDK 03 006 ON- 0^ 08 7<» 1130
TTT/I
25 02/*0 077 05 fl 077 T>5 fl 97 2 J
134196 OOR07 006 ON- 09 01 74 0840
^I7F^ T)FF- 0'5 03 74 1015
—- - - - - - ' 35 .-.--
-------
. C.7 COLORADO 222RN RESULTS
COLORADO REPORTED 75/07/08
•ANALYSIS RESULT-—2SIGMA UNITS
"flRAMO TJcf COLO
25 0240 077 05 8 «7 2
1351'fQ" ni.)H07"b06 ON- 09 09 74 loOl
SIZE- OFF- 09 li 74 0906
GRAND JCT COLO
~2"?~6?47'"~8"?7""05" 8 97 2 ' :•""
134751 OOROfl 006 ON- 09 21 74 0944
?TZE- OFF- C9 ?3 74 093?
1.3E01 2.8f>01 PCI/L
TCT COLO
25 0?fcO 077 05 8 97
"2P2RW"'
1V4TO1 TV9T 07J P (! J / L
$ZE-
OFF- li) 15 74 1100
GRAND JCT COLO
" ~?5 " $24 0 U7 7058 97 ?
1354B? ODR10 006 ON- 11 02 74 0825
5T7r- "~ "OFF- II fl4 74 1040
3.7EOO 1.5F.-01 PCI/L
6ITA"ND JCT COLO" "
25 0?40 077 05 8 97 ?
~"l4TOO~8~'60Ril"006 ON- 11 22 74 1005
SIZE- OFF- 11 ?4 74 1010
4.8F.OO
PCI/L
GRAND JCT COLO
222HN
7,OEOO U4F.OO PCI/l
141406 OOP1? 006
STZF-"; •"'"
ON- 12 15 74 0950
OFT- 1? 17 74 1045
25 024U 077 05 8 97 ?
T4TT06~ ODM3 \ft6 ON- 01 04 75 0940
SIZE- OFF- (;1 06 75 1005
GRAND JCT COLO
6.3F.OTJ
222JiN
1.4E01 2.9F-01 PCI/l
25
142306 OOR14 006
~ SIZE- " ~
ON- 01 25 75 0925
OFF- 01 ?7 75 1030
"CP'AND" JCT COLO
25 0240 077 05 8 97 2
^4T9W~OT)Er15"W6 ON-"02 16 75 0950
_5IZE- OFF- 02 18 7S 1200
GRAND JCT COLO
~25"D?40 077 05 fi *7 }?
143206 OD^16 006 ON- 03 08 75 0930
SIZE- " "OFF- 03 I'D 75 1250"
5.6EOO 1.8F-OI PCI/l
7.H-01 6.7F-02 PCI/L
36
-------
..... JPT...COLORA_00 222RN RESULTS
COLORADO REPORTEO 7s/07/oe
GRAND JCT" COLO ~
2* ?**.c. 077 05 8
~T*40&6 b'Mi7~IT06
GRAND JCT COLO
~2?lR"N~ 8,TE<>6
P'cT/L
ON- 03 2$ 75 1025
OFF- 03 31 75 1030
222&N
l.OEOO 8.1E-02 PCI/l,
°°WOl 007
ON- 04 27 74 1203
OFF- 64 29 74
GRAND JCT ~COCO~~
25 0240 077 05 8 97 2
OW^r 05 18 74 1144
OFF- 05 ?0 74 1056
22ZRH
6a5F-OT~ 674^-02"
GRAND JCT COLO
-0-71r •05-B
00^03 007
222KN
7.5K-01 6.BE-02 PCI/l
ON- 06 08 74 1145
~0"6 10 74
GRTBn~JCT COLO"
^_9?AO 9.7.1. .os .?
13P496 "onPQ4 007
SIZE-
I.6F.OO
ON- 06 " ?B 74' 1555
OFF- 06 30 74 1405
GRAND JCT COLO
NO-SAMPLE
133223
SITE"-
S 007
O^i- 07 ?0 74 144C
-D? 2? 74~X6'50
25 0?40 077 05 ft 97 2
I3'J?4-0'""onP'D5~Tr(J7 ON- 07 ?4 74 1 130
SI7F- OFF- 07 ?6 74 1225
GRAND JCT COLO
2.8E-01 4.1F-02 PCJ/t
1336S9 ODH06 007 ON- 08 10 74 1105
5T7E- .......... DFF- 08 12 74'JOIS
JCT COLO "
25 0240 077 05 8 P7
?22^N
«9.6I-01 "T.6F-02 "PCI/i.
SIZE-
OM- • Cf«> ^T 74 "0955
OFF- UO
-------
GRAND JCT COLORADO ???RN RESULTS
COLORADO REPORTED 75/07/08
•ANAL YSI S—RESULT——2S t GMA—UN IT S
GRAND JCT "COLO"" ~ 2?2W ~ 4.'fEOO~T.6F-OTPCI/L
25 0240 077 OS 8 97 2 _
OOP1T008ON- oi 04 75 O93o
SIZE- OFF- 01 06 75 0920
GRAND JCT COLO 222RN 3.8EOO 1.7F.-01 PCl/l
~2~S 02VO77 d5~8~97 2 "~ ' ~~~
142308 ODP14 008 ON- 01 25 75 0910
577F-- OFF- 01 21 75 0940 "~ " ~"~ ~"~
<5R~AW JCT COLO -------- ---------- 222RN ----- ^2 . 5C0~0 I T3T-OT~ PCT/l
25 0240 077 OS 8 97 2
OR- 02 16 75
SIZE- OFF- 02 16 75 0945
GRAND JCT COLO 222RN 6.3E-01 7.5E-02 PCI/L
25" 0240 677 05 8"9? 2 ~~ ~"
143208 OOP16 008 ON- 03 08 75 0915
OFF- 03 19""75
"~ "SB AND" JCT COLO 222RN I. TCO'flT ITTE-OT~ PC t/l
25 o?AO 9.7.7. •?. fl 97 ? _ ___
T44008 oORl7"f»08 ON- 03 ?9 75 I0l5 " ................ "" ....... .....
SIZE- -3 31 °
GRAND JCT COLO 222«N 2.1E-01 3.7F-02 PC I /I
^ 0240 077 05 fl 4fi "" '" ~
.. - 40 - - - - —-
-------
,'CT COLORADO .. 222»M _ RESULTS
COLORADQ _ __ REPORTEO 75/07/08
.^-.ii---^-.-..-.--...--^....--..-^^
GRANO~JCT coTo" ~ ............. "i-fsw STR'-OI STST-DI? "PCI/L
25_°J»40 077 05 8 57 ?. _____ __ _ ____
133661 OOR06 Q6<3j ~ ........ ON- Od 10 74 1136 " " ........ ...... ""
SIZE- J OFF- 08 I?. 74 0805
GRAND JCT COLO NO- SAMP
sirna^iT "TjT7~o"5~E "~9T z ..... "~ ..... ~" ...... " "; ...... ...... ............
134192 00907 009 ON- 09 01 74 0745
" "OFF- 09 03 74 0<*VO " ' .......... ........ ~~~ "
COTCT ?22*N 4.
-------
r.PANO JCT COLORAnO ?2?*N RESULTS
COLORADO _ REPOWTFD 75/07/08
"«i'.".ii..~... ~-....; . ;..... ANALYSIS—-RESULf----2SiGMA---l
G~RAND~JCT C0ln ?22^N 2»8F-oT'" 4.3F-02 "PCI/L
?5 0240 077 05 8 97 ?
"142^09 OHR15 009 "' ON- 0? If. 75 1130
SIZjr- OFF-.02 18 7S 1050
GRA_NfL JCT COLO _ . 2_22_RN A».Mr°J. 5o7E-Q2 PCI/L
143209 OORlfS 009 ON- 03 08 75 1110
-STZ>- OFF-OS 10 75 1145 " """ ~
6R"A~NOJCT COLO" 222RN """5", S'C^Ol57BF^? PCI/L
25 0?4?_077 ??. 8_?7 2
TWoT9"oT5ffI7"6'd~9" " ON-" 03 ?9 75 I24"o
SIZE- OFF- 03 31 75 1220 _
GRANO JCT COLO 222&N 1.3EOO 9,Qt:-02 PCI/L
"25024067705897 2 " "~ "'
130602 OOROl 010 ON- 04 21 74 1430
OFF- T-4."29 74 0900
JfT'"COLO" ~ '222RN 2,4EOD I72T-01" ~PT.i/l
"T!IW5'3"OT5R03~F10" ON- 06 68 74 niO
SIZE- OFF- 06^ 10 74 U00
GRAND JCT COLO 222KN 3«^tOO 1.7F.-01 PCI/l
T!»~0"2~4')""5"7T 05 a 97" ? " " ' " ""
TfZ¥- ~ OFF- 06 ?0 74 1305 " ""
"GRAND JcT~c:oTO "" NO-1?A~MPLF~ :
25 0240 077 05 8 97 ? •__
•ry5&?G~QW$5"TFlti ON- 07 ?i) 74 1520 ""
SJZE- OFF- 07 22 74 1010
C.RAND JCT COLO 222^N 1«?EOO 6.2E-02 PCI/l
25 0240 d77~"05 6 97 2""" " ~
133596 ODR_0_ft__OlO ON^OB 06 74 1355
^p._^8 gp 74 y35o
jcre.ouo 222RN ft.oE-oi 7;ir-o? PCI/I
r5 0?40 077 05 fl 97 2
5nPTir5'~010 O'M-" OR 10 74 Ofl50 ~
SI7K- OFF- 09 12 74 0745 _ __
ORANO JCT COLO 222^ 1.4t'00 9.4F-02 PCI/l
"25"0740 077 05~8 97 ? ' ~
13419Q 00^07 010 ON- 09 01 74 0615
Sl/b'- "" "~ "" OFF-"09 '01 74 0750
-..'..... 42 -. - ._ _....
-------
GRAND JCT COLORAf)0??^RN RESULTS
COLORADO _ REPp»Tf_0 75/07/08
"^«. .»-.«._;...«;:..;_..;. ..-.—..— ..—-.-^-
OR ATlfT~Jr T "COL o NO^'SAMP'LE
2l_P?^r' o?7 0 ___ OFF- 09 23 74 104JB______ _
^PAJ:L0 J..9I 901=0 2?_?!_!i s»J_L°-°. 1»BE"°.| PCI/L
25" 024Ti 077 05 8 97 2 " r " "" ~ "~~ "~
13494 6_pWp_8_010 ON- 09 30 74 1000
"5T?E-""~ OFF- "10 02 74
JCT" C'OCO
d 077 05 8 97 ?.
" ON-"IP n ?*
_SIZ§- OFF- 10 ?3 T* 1055
GRAMO JCT COLO 2?2WN 9.7E-01 7.8F-0? PCF/L
?5~6"24'0'"077 05 fl <57 2 ~"- "' ~
17S486 OOK10 010 ON- 11 02 74 1055
~ ~ <5FF-"Tr"0"4- 74 1155 ;
~ "«'2PN 1.7FO"0
_ 2? 0_?40 077 05 fl Q7 ^ _
T4i"oii?"onc?ii oio""" ON- 11"?? 7*'Toi5 "" "
SI7.E- OFF^ 11 2^ 7^._L215
GRAMO JCT COLO_ _
~'~25~0?40"~«F7'7~"fli5 8"<>7 ?
_K1410 00«li? 010 ON- 1? 15 74 1040
""S1ZF.- ~ OFF- 12 17 74 1115
^^ND~jc"T""c7JL"cr —
25 0240 077 05 8 97 ?
mTlTroTWTT"1>TO~ ON- 01 G^» 75 HOC
_SI?£"" _ OFF" Ol °6 75 lo35 _ _
GRAND JCT COLO 2WN -?.8FOO U4F-01 PCI/I
JT5"~0?4T 077 {J5TT97 ?"" "" ~ """ " "
142310 00*14 010 ON- 01 ?S 75 1035
:5TT7[^- "•""" 'OFF- "01 ?7 75 1055 ' ~ "~;
—GRTN"D"J'C'T COLO" " 222T«l l.f.^00 T.5C-OT' PCI/I
25 0?4i 077 05 8 97 ?
—T*7.nr~(5nRI5-TTO ON- C? 24 75 1015
SlZr- OFF- 02 26 75 1015
GRAND JCT COLO 222«N 4.3t'-01 6.0F-0? PCl/l
•~'?5"0'24'T>'"077~05~8'<»7" 2 -
141210 OJ>P16_(UO ON- 03 08 75 1025
~ " ~" OFF-"01 10 75 Io40 "" " "~"~ """
-------
GRAND JCT COLORADO 222RN RESULTS
COLORADO REPORTED 75/07/08
•ANALYSIS—RESULT 2SlCiMA—UN I T!=
c:
GRAND JCT "COLO " "" ~22"2KN"" 6«fiE-Cl " T.OE-H2 P'Cl/1
25_024i 077 05 fl 07 2
J440TO or>Pl7 OlO ON- 03 31 75 1115
SIZE- OFF- 04 02 75 1010
_ _ 4.7j:00 1.7E-01 PCI/!
25 0240 "077 0"S"~8 97" 2 " "" " " " ~
130603 OHR01 Oil ON- 04 27 74 1415
"""s"I2€- OFF- 04 29 74 H22 " " ~" ~ ;
25 0240 077 05 8 97 2
..... "ON- "05 10 74 1210"
SIZE- OFF- 05 20 74
G R A NO JCT COL 0 2! 2 2 r< N 7. 1 £ 0 0 1.3E 0 0 P CI / L
25 0240 07705 8 97 ?
_1JJ954 pOR03 Oil ON- 06 00 74 1125
SHE- "~" ' OFF- 06 10 74 1246 ~" :
JCT COLO
_?? P?4(; 077 05 8 97 ?
132499 bOP04 Oil ON- 06 2H 74 1120
SIZE- OFF- 06 30 74 1255
GRAND JCT COLO Np-b_AMPLE
"25 02^6 "077 05 8 97 2
13322T 0_lV05_ 011 _ OM- 07 ?0 74 1525
ST7E-""" ~OFF-' 07 22 74 1025
"JCT~CT)LO "
25 02^0 077 05 8 97 ?
T35232 bDROS Oil ON- 07 ?4 74 1115
SIZE- OFF- 07 26 74 1240
GRAND JCT COLO 222«*N 3»6.f:0.P 1.5E-OI PCl/l
216; 0240 T7T""55~8 "9"T"" ?
133663 00^06 011_ ON- 00 10 74 0910
"~ "" " OFF- 06 12 74 0755 ~
GRAND "JCT COLO 2?2'R"67""OTI ON- 04 OJ 74 0825 ~
SIZE- OFF-,09 03 74 0800
GRAND JCT COLO 2?2^U 1.7E01 2.1F.OO PCI/I.
25 0240 077 05 rt 97 ?
134755 OD»Oft_On ON- 09 ?i 74 1219
5T7!T-' " ••;FF-'o«y 23 74 1100 " " """ "
.__ _.. .- 44 ... . _. .
-------
______ TS
COLORADO REPORTED 7S/07/08
•ANALYSIS RESULT——2SI6MA-—UNIT*
GRAND Jcf'cOLO " ~2l2KN~ T.lEOTT. JoTFOO PCT/l
?5 0?»0 077 0_5_8 97_ ? _ ____ . _ __ ____ _
T3?1>3"QORW "till ON- 10 13 74 0825 "
SIZE" ___________ '" _____________ OFt-J.° 15 74 0855 _____________________ ..... __ _ __________ _ ____ _ ____________________________
GRAND JCT COLO 222KN 1.1E31 _ 205r.=01 PCI/1
25 02^0 ~5T7 05 8 97 ? "'
35*8(BOO.R10_01_1 __ ON-_1 1 04 74 11 IS
" ..... " " "" o~FT- l\ 66 74" 09
7VRAND JCT COLO" ZZ'ZffR TT. 6rOU Io'9E=in PUT/L
141013 OORll 7T1 6R-"~n~"2? 74
SIZE- OFF- 11 24 74 1035
GRAND .JCT COLO 222RN 7.1LOO K4FOO PCI/l
141»U QDP12 Qll ON- 12 IF 74 1035
5IZC_ OFT-~T?
r.RANU~UCT C0ro~ 222KN *'.7E1FO 2.0F»01l PCTXL
25 0240 077 05 8 97 t
U1711 OORn Ofl ON- 01 04 75 lOSO
SIZE- OFF- 01 06 75 1025
GRAND-JCT COLO ^"^L _J«?EOJ 2»8E°01 PCI/L
25 0240 OT7"ff5~l~~$T ?
142311 OORJ4 OH ON- 01 25 75 1025
SIZE- "" ~~OFP- 01 27 75 1045 ""~ "
GRAND JCT COLO 777RT5 5"."5ETJ7r I.9E-01 PCT/l
25 Q240 077 05 8_97 ?
142911 ODPT5"CT1 ON- 0? 16 75"T045 ~~" "
SI7E- OFF- U2 18 75 0955
•GRAND JCT COLO _ _ 222KN _ U2KOO ft00g°02 PCI/l
25 OZ<»0 U7T"05 8 9T ? ~ .....
143211 OOK16_01J ___ ON- 03 10 75 1035
5T7F.- ~ OFF- 03 1? 75 1010
FCT71
25 0240 077 OS & 97 • 2 •
OR- OT 79 75 1135 ......... ...... -------- ............ "~ ...... ------- - --- ~ ------ T"~
SI_Z_E- OFF- 03 31 75 1120 ' ' . __ ___
GRAND JCT COLO 222«N 602t-01 603E°02 PCI/l
DWU~-»77 05 fl 97 ^ ----------- ----------------------
130604 OOROl 012 ON- 04 27 74 1346
STTF- ........ "'~ " ' '"' ..... OFF- 04 ?9 74 1333 . ...... ~> ......... ' .......... -------- - ...... ~ .............. " ......
i
" ......... ................ • ' 45 ' "' ............... "• ..... : - ~~
-------
_ JCT COLORADO ??2«N RESULTS
COLORADO _ REPORTED 75/07/08
...„-.-.-. .................-.....^.ANALYSiS RESULT—-2StGHA—UNm
GRANOT JCT"COLO~V"~ ~ ~ ~222RN ~4.6IE>OT ~5V5f>02PCI/L
25_0?/*0 077 05 8 97 ?
131428 66R02 012 ON- 05 18 74 1330
;SIZC-_ __.. .._ OFF- OS 20 74 1345
GRAND JCT^COLO 12JKN _ ^•IE-01 7.1E-02 PCI/l.
25 0240 077 05 8 97 ~ "2 "" '"'" "
131955 ODR03 012 ON- 06 08 74 1325
SITE- " OF?- 06 10 74 1345 " ~~
GRAW"JCT~COLO ~ 222KN ~T,"7E-0~r6".~9F^"0?""~15CT/'L
25 0240 077 05 8 97 2
T32"§0~0 oW&4-~o"T2~ - ON- $6"?8 74~ 1266
J5m> OFF- 06 30 74 1415
_G&AND JCT COLO ?2?RN _ ft.flt'-01 6.5F-02 PCI/L
25^0240 077 OS 8 97 ? "" "" " ~ " ~
OOR05 0^2 ON- 07 ?0 7*» 1555
"" " OFF-"0"? "22 74 140(5 -—•- -
"r.RANO" JCt COLO 2?"2WN" " 4.7F-01 "5."6^-0"2~ PCI/I.
?5JiL*.P P7.7 ?5_9 97 ?
133664"ODR06~01? OM- C« 10 74 0335
SITZ^
GRAND^JCT COLO ??2»JN ^»^-01 6.2F.-02 PC IA
25 0?<»6 6?7 05 R 97 ^
OU- 09 01 7<» 0«00
OFF- 09 03 74 0740 " ~ " """
077 05_8 97 ? _• _ _
T34756 "66R"08'~CV12" ON- 09 ?\ 74 124i
_^I_ZF- OFF- 09 ?3 74 1201
GRAND JCT COLO 222HN 9.0E-01 6.6E-0? PCI/t
25 0?40 0"77 05~8 97 "jT " " " ' " " "~
135151 00^09 01? ON- 10 ?1 74 1110
iy K w\\& - ; -
JCT COLO 222SN "'IVS'E'OO""" ~^S^-0"2 PCI/1
25 0240 077 05 8 97 *
T354"9T~OD^I5 612' ON- 11 0? 74 UlO" " ~
Sl/F- OFF- 11 04 74 U50 _ _
fiRANO JCT COLO ??2*N M.2E-01 7.2E-0? PCI/l
25 6?40 677 05 ei 97 p -
!MO_U OOP 11 012 ON- 11 22 74 1145
" """ OFF- li 24 74 IUG """ '~ "~ ""
46
-------
T COLORAPQ ??2«N RESULTS
7iV07/08
GRAND JC.T COLO
_ 25 0240 077 0<3_8 97 2
' 14l4 IT'OOP I• OFF- 1? 17 74 1150
•ANALYSIS RESULT—--2SIGMA UMlTr>
"2~22"R"N
GRAND JCT COLO
222RN
UfcEOO 90<»E-02 PCI/L
25 0?40 077 05 8 97
?
P.* '75
06 7s
GRAND JCT COLO
25 02*0 077 05 8 7
2".OEOO " 1 .2F.-01 ~ PCI/L
SIZE-
_ _
OIM- cl "?5 "7*5"To"45"
OFF- 01 37 75 1130
GRAND JCT COLO
"2T"T)2~iO~"~67'7 OS 8"07 i»
ODR15 01? ON- 0? 16 7b 1110
"OFT-"-O
1.1EOO 8.3E-02 PCI/L
25 Q?<>0 077 ^5 8 97 t'
143212 "6"OR"F6 01? ...... " "OM- 01 6»"7*i'"ioSO
S1ZF- OFF- Q3 10 7S 5
GRAND JCT COLO
677
222HN
l.OfOO BeOF.-02
SIZE-
ON- 03 ^^ 7S 1200
"OFF- 03 31 ' 7 S U55
GRAND" JCT"C01T)
25 0?AO 077 OS 8 97 ?
1306*6 ODP6T~^I3 ON- 04 ?0 7V V,
SI7E- OFF- OS 01 7* 1100
GRAND JCT COLO
322>-N
R.9E-01 7o2H°02 PCI/L
13S5B1
013 ON- 05 ?1 74 1340
OFT- C5 ?3 74
"COLO
25 0?40 077 OS 8 97 ^>
nr?I^'on'p"'c:r3i3~"~ ...... ON- 06 10 74 i
SIZE- OFF- 06 1? 74
1.H.OO
GRAND JCT COLO
T5"~&2"40 077 05 Q 97 ?
S32586 OOR04 013 ON- 06 30 74 1210
3«2E-01
PCI/l
47
-------
.... 222PN RESULTS
COLORADO REPO«TEf) 75/07/08
•ANALYSIS—RESULT—-2S lr»MA---UNi T S
"GRAND JCT" COLO ~ 222RN " 2.4E-01 "7.9E-02 PCI/L
_?J5_PJ!*2 JL77. J?5 P 97 ? ________ ______
133230 60~P05"OI3 "ON- 07 22" 74 0956
OFF- 07 24 74 1050
GRAND JCT COLO NO-SAMPLE
05 a"97 ............. >: ........ -"• • .......
134197 00*07 Or.? ON- 09 03 74 1110
OFF- "09" w 74 nod
"G"K?SNO"~JCT COCO "?2^RN" ""4."6E-OT SVSI^O"? PCT/L
25 0240 077 05 B 97 ? _ _
TSJ342"~6DP'OTini ON- "09 "09 70!
077 0?""8'97' ?
135489 ODP10 013 ON- 11 04 74 1320
SIZE- OFF- 11 0* 74 1020
OR AMD JCT COLO 522~KN "T.7EOO "T70"^-0~I PC I /I
25 0240 077 OS 8 97 ?.
"141015 oD'ftrr 017" "' "ON- II 24 74 1100
SIZE- OFF- 11 26 74 1105
GRAND JCT COLO 222KN 9.3E-01 7,5F:-0? PCI/l
25 024!> 077 05 8 97 2
1 P.P_PJ ? _(M1. _ P.N" l* 31 74 0955
5T7E"- "OFF- Or 02 75 0940"
GRAND" JCT""COLO"" S'AM'PL'E-LOST
?5 Q?<* > 077 05 fl <>7 ;>
"T4T7T3" ODftl'j"""T'TI""" ON- 01 07 75 1635 " "
SI7E- OFF- 01 09 75 1010
GRAND JCT COLO *-?.2HN ! •1.IL0_E- " " "OFF-"••)! ift 75 lobs
" 48 " '
-------
.GRAND. JCJ COLOR ADO _222«N &E. SUL T S
REROUTED 7*3/07/08
•ANALYSIS—-RESULT-.-—?SIOMA—UH
GRAND JCT COLO "" 222HN"~ 3.?E-Ol "4.TF-S? PcT/L
25 °.?.4^ P.1.7 9_!?JL07. ?.
14?3T3 nfykl"4" 013 ~" ON- 01 *? 75 U55 " : """" "~
SI7F.- : OFF- 01 29 75 1025
GRAND JCT COLO 222&N 4»frtf-01 S + 4F.-02 PCI/l
6-77-05-8-97 T" ~ ~~
142913 OOR13 013 __ ON- 02 18 75 _ 1115
STfT- " ""OFF- 0?" 20" 75 "TlI5
.15r-02 PCT/i.
25 02^»0 077 05 8 97 ?
IA3Z1S OT5RT6~75TJ -------- -Qff- o T~T'(T f^ "T3IQ>
SIZF.- OFF- U3 1? 75 1050
GRAND JCT COLO 222RN 2.4E-01 3.8F-02 PCI/L
"05" 8^ <57 2 " "" " ~ "
ODf^l7 013 ON- 03 31 75 1240 _
Ofr--T*~TJ?' "75" "1 1 15 ----------------------------
"GR'A'NU" JCT COOT"
25 0240 077 05 £ 97 2
"~T3Tb57""oO»or"nr4" " ON- 6<» ^9 7^ .1641
SIZE- OFF- 05 01 74 0958
GRAND JCT COLO
T*T~0~?4& 677"05 6 ^7 ~2
131582 OORO? f'14 ON- 05 ?1 74
- §T7E- .................. "OFF- OS 23 74'1426
.JCT "TOUT 7Z2TTN" ...... "P75r=TTI T. IF.-OZ
25'0?*»0 077 Ob 8 97 ?
~I"3T9'T7~onRiT3~'CI4' OKI- 06" 10 74 UI5 ...... "
S!?F- OFF- 06 1? 74 0955
GRAND JCT COLO 222HN fc>3L-01 7.4E-0? PCI/l
n?5fl7 ODW04 014 ON- 06 30 74 1350
'~"l»I7r- ............ "'" .......... ""•• OFF- "07 0? 74 1025
jCT c.OLO"" 222r
-------
GRAND JCT COLORADO 222RJN RESULTS
COLORADO REPORTED 75/07/08
ANALYSIS— RESULT— 25 IGMA— UNITS
GRAND c COLO ~222KN~" 6 . lT- 01 6.EM)? PcT/L
25 _0240 077 05 8 9.7 P __ ___
134198 ODR07 01* ON- 09 03 74 0925
, _SIZj> _ OFF- 09 05 74 0910 _____ _____
GRAND JCT ; COLO ?2?WN _5»?E-01 ?«^fT°.? _ PCT/L
25 0240 077 05 8 97 ...... £ .......... •"" ................. ~'~ ..... ..... " ..... ~ ..... "" " ................. ' ......... "~
134758 OORpa 01* _ ON- 09 ?3 74 0905
SHE- ................ OFF- 09 25 74 0900 ........ ~ ........ " ................. .............. ~ .......... "
~GPANO JCT COLO " -' 222RN 7.5F-OI 6".~6T-^r PCI/L
25 02*0 077 OS 8 97 2
"~T35T£5 OOK09 "ffl* "ON- 16 15 74 lOOO
OFF- 10 17 74 0940
r,RAND JCT COLO 222«N 8.5E-01 7.2^-02 PCI/L
25 ""02*6" 077 05 ~8 97 Z ~
135*90 ODR10 014 ON- 11 04 74 0915
...... ..... - orr- 11 06 74-0926 " ......... ------------ ~ — ...... --------------------- ..... --------------
GRAND JCT COLO ......... 222&N ......... I'iSEW lilT-fll PCI/L
.._.. ._. -
141016 ..... ODRl"i""Ol4' " ~ON- 11 ?4 74 0905
SIZE-
GRAND JCT COLO _ 222KN 1.2EOO 8.2?:-02 PCI/L
^ ^4(5 57705 e "97 ? " : ""-
Ul*l* OOR12 01* ON- 12 31 74 1015
"SlYF"-"" ............ " ..... ~~ ..... ""OFF- 01 0? 75" 1015 ........... '."'" ..................... .........
?5 _0?40 077 05 8^97 ?.
141714^ ODRITOU "" ON- Or 07 75 0940
SIZE- OFF- 01 09 75 0910
JCT COLO 222»2f-02 PCI/t
"~"" "
14?314 00^14 C14 ON- 01 ?7 75 0930
Tr/F-; """ ' OFF"-" 01 ?Q 75 0925
JCT "COLO .......... "2?"2>TN ......... 8."9E=D"l 7"."«F=0"2 P?!"f/i
25 0?4(> 077 05 8 97 ?. _
r*"2^T*~"oo*<'i5"irr*" ...... ON- o? ie 75 0935 ....... ....... -
_SIZE- OFF- 0? ?0 75 1000 __ _ ___
GRAND JCT COLO NOS'-MPu:
""2^0^4007705897 --...- --------------------------- -
J4SQ71 00^1^_''14 ON- 03 10 75 1010 _______ _
SI?F'-~" .............................. OFF-" 03 "12 7? 0940 ....... -.-—-.- .....
_ .... 50 ' _ _ _________
-------
CpLp^AOp REPdHTEO 7S/07/08
•".•«----—- .—_—— —... ANALYSIS—RESULT™-?SlGMA—Ur^IT'
.GRAMD JCT COLO 2?2*N 4.9E-01 6,OE-0? PCI/L
_J?.5_'0.?*° °77 P.5. * *-7 ? - ____ _ _
143?14~OORl(S ~CJ4~ """ON- 03)7 75 J035 .......... .......... """
• _____ jRiz-E-.. .-. ............ ill....... off- .9.3 i9 .7V MA?
GRAND JCT COLO _ 222«N S.2E-01 S.6E-02 PCI/L
""25 024TT ~OTf"05~ 3~Q7 ? ..........
. I* 5P*17_?>* ___ QN- 03 31 75 1005 ___ ___ __
"SUE- " oW- o<» 02 75 "0950"
GR~ AW~ Jc T COLO r~ - ' 2" 2 2~R~N T.TF- fiT~ T. 4"E -*"?"•" PC"i/i
25 02^>0 077 05 8 97 2
130646 OORQ1 01S ON- T)4 7»9~T4 "TBTfl """
SIZE- OFF- 05 01 74 J035
__ _
25 "0240" 07 7 0^897 ?
S315R3 ODR02 015 ON- 05 21 74 1450
222RN 5.1E-01 5.6C-02 PCIL
COLO~ "'~?22RN S7SE-iSiT 57Br^T2 ~ PcT/L
25 0240 077 05 ft 97 ? _ ______ _
OS "615 " ON- 06 10 74 1230 ...... ~ " ................. "
5I2!E- OFF- 06 1? 74 0920
GRAND JCT COLO 222WN 4.6l>01 6.4E-02 PCI/t
-
OFF- 07 02 74 0955
JCt COLO " ?22KN .^.'SE^TTI 5.3P-02 PCI/L
25 02^0 077 05 B 97 ?
n"5Z3^~Ofifc~0™5™OT5" ON- 6 724 741 '335 ..... ---------- ~ --------------------- 7 ---------
____SIZF- __________ OFF- 07 26 74 \ .32.5 _ ______ ____ _
, 'GRAND JCT COLO 222«N 5.5E-01 6,&F-02 PCI/L
133666 QORQ6 015 ON- OH \? 74 0930
SITE"-" ...... " T " flfF- W 14 74 "OWJT
JCT COLO"
25 0?4(J 077 OS 6 97 2
O5T99; o"OROT"in^" ON- no 03 74'"o's
SIZE- OFF- 09 OS 74 0845
GRAND JCT COLO 2?2^N :.U5E-01 4.6E-02 PCI/L
"~ 25 C?40 077 05 A
-------
.JCTCOLORADO 222RN RESULTS
.COLORAOp REPOfTKO 75/07/08
•ANALYSIS RESULT—-2SIGMA—UNITS
GRAND JCT COLO 222*N 5.3E-01 5.7F-02 PCI/L
?5 02.* 0 077 05 8 07 2 _ _
" 13475"9~60HO"« 015 ON- 09 ?3 74 12'ifl ...... ....................... ""
I SIZE- OFF- 09 «?5 7* 1040 .............
_ COLO ____ ?22WN 6.6F-01 5.8F>02 PCI/l
25 "02*£~'6>7" 05 « 97 •" "? ....... "" ..... •"-• ....... ~ ..... " ...... ~ ...... "
135152 OOR09 015 ON- 10 ?\ 7* 0935 _ _
-"10" ?374 1025 ........... ........ " ......
GRAND" JCT COLO 222'RNf IV-lEOO9TIF-OT" PCT/l.
?S 0?*0 077 05. 0 97 2
oow'iT oTs """ON-' 11 11 74 01 5.9E-02 PCl/l
'2«5"0240 077 05 8 07 :>
1440IS 00'^ 17 01S ON- «>3 ?? 7b 1225
SI7F.- OFF- 03 31 75
52-
-------
GRAND JCT COLORADO ??2i16 ON- Ofc 30 74
(Tr PC I/I
^_ JL^40 °77 _os « 97 ?
3323 j"o!)POrr" Gift ..... ON- 07 2^ 74 } 04S ..... " ...... " ...... ...... "" ....... ""'
JCT COLO ??2I?N 7.4F-01 6.8F-02 PCI/l
' ~f>T7 '"05""« 9/ ,?" "" ' ' " "" ........ " ................................. ......... """
1_3JI667 or)i<06 0|6_ _ ON- OP 1?.' 74 094$
ST'7l-""" ....... """ "" " ...... OFF-'CP 14 74 OBIS """" " ......... ~ ..... ...... ........ ""
T.'TOTJ
?5 02<»!)_ 077 OS 0 07 ?
TT*215(r o'i')R07"~?JlfV"" "" ...... ON- 0<5' 03 '74 "6^10 ................. ............
SIZ.- OFF- 09 05 74 0905
09ANP JCT COLO 222*v'N B.fet-01 7,»r-02 PCI/L
25
OOPOB lfr_ OM- 0V 23 74 0930
" - ""5'Q 25 74 O'<)"15
Ti'PANO" JCT COLO 222K^ ~ l.^iTOO ITOF^DT "PcT/i
25 0240 077 05 h 97 ?
T35r*IToO'PW""'lT6"~"" ON- 10 15 74 f» 935 ............. ' ................ '
SJZF- OFF- 10 17 74 QS»30
GRAND JCT COLO 222^N 2.7^00 1.3F-01 ^CI/L
?5""(J'?SG"077 OS 8 97 ?
OFF- U 13 74 io4&
c: 7
, *.' ^J
-------
_ COLORADO ^?2RN RESULTS
COLOR ADO - !*Ep.PHTED 75/07/08
__._..
GWAND - 12 02 74 1000
___ .SIZE- ;.. OFF- 12 04 7,4 1150
222&N
3.0EOO
1.4F-01 PCI/L
_ COLO _ _ __
~?VO?4D 07705897" ?"""" ' ;
J.*!*1.!*. ODR12 916 ON- 12 31 74 1010
Tl/F- ~ OFF- 01 02 75 lOTO
222RH
-2EOO
PCI/L
"TiftA"NO"'JC'f"COLO
?5 0?40 077 05 8 97 2
SAMPLE-LOST
SIZ-
OFF- 01 09 75 0920
_ COLO _•
25 0240 077 05 « 97 ? •-•--•-
141921 ODR13 016 ON- 01 14 75 1025
OFF1- 3116 7$ "1 020"
JCT COLO
222PN
?22RN
PCI
.1? _--
K?316 or>R14
SIZE-
ON- 01 27 75 0950
OFF- 01 29 75 0935
GRAND JCT COLO ______
25~024"» 07 71)5 8 97 ?~
.1*291 * OORl_S_ 016 __ ON- 02 18 75 0920
SIZE- " OFF- 02 20 75 1005
222«N
&.4E-01 « 11~
O
222RN"
2S 0240 077 05 8 97 2
"l45?T?rb0»"r6'~OT6~"" ........ ON- 03 10 7S 1625
OFF- 03 12 75 0950
GRAND JCT COLO
22WN
3.flF.-Q3 PC II
25
144016 OOP 17 016
ON- 03 31 75 0950
OFF- 04 02 75 0955
GBANO" JCT' COLO'"
25 0240 077 05 8 97 ?
317 ........ ON- 04 ?5 ?3 74 1335
222^N
6. Of.' 00
1.2F.OO PC I /I
54
-------
...._. COLORADO ??2RN RESULTS
COLORADO REPORTED 75/07/08
ANALYSIS—RESULT— — ZSI5MA --- UNITS
-
GRAND JCT COLO 222TJN3«1EOO To4E»Ol PCI/L
25 0240 077 05 0 97 2 _ _
"OOROJ ".
~nT35P53" ~OOW3 TIT ON- 1621 74 4950 """ ~~' ~"r
SI7E- OFF- 10 23 74 1035
_GRAND JCT COLO _ _ 222^N 5_.2EOO lo6E-Oi PCI/L
55~~6~?4D 577 05 fl 97 ?
J354^5 ODP10 017 ON- 11 11 74 1005
5T7E-" " " "~T)FF- VI 13 74 1045 " " " ~
JCT COLO" • 222TN 7.SEOO I'^TOff" PCI/L
25 0?40 077 05 8 97 £
~"I«T3T9"oniPl'I"~aTr"~" "ON- 11 ?4 74 1045 " ~"~ """ :
SI7f- OFF- 11 ?6 74 1020
GRAND JCT COLO
"T5~0"?47J 077 05 8 97 £
141417 ODP12 H17 ON- 12 31 74 1005
SfTE- ~" OFF- 01 62 75 lOOO
55-
-------
JCT COLORADO.. 222RN RESULTS
COLORADO REPORTED 75/07/08
•ANALYSIS RESULT 2SIGMA-—
GRAND JCT COLO • .. 222PN 1.2EOO 8.8E-02 PCI/L
25_024.9_ 07j_05_8 9r Z __ __ __ __ _
"141717 00^13" 017 ON- 01 07 75 0955
°l °9 7S
JCT_ COLO - _ H?.^* L_ __ l'AM*L ?**f."0? pCI/L
25 0240 Of 7"W 8" 97" ? 77
.I*??1 7 on.?14 °l.Z_ °N- °.1 ?7 7S l°*° ___ _ _ ___ _______
SITE"- " orF- Of ?0 75 6940
OR AND "JCT ~ COlO" " """ "~" 2?2R"N "" 7.TO6 " ~\ .TE-OT PCT/L
250240 077 05 8 97 ? __
T4?9l7""b"DRlS' 017 ON-"0?~W7?~m"5" " "" " "~
SIZE- OFF« 02 20 75 1010
JCT COLO _ .??.?WN _ _ l±l?_00 ____ 9. l_Ej-02 PCI/L
25 ^0240 077 OS 8 97 2 ""
143217 ODP16 017 ON- 03 10 75 1200 _
___ 077 05 8 9 7 _ ?
144017 09«lT~rT7 ON- 03 31 75 1025
SIZE- OFF- 04 02 75 1000
GRAND JCT COLO ?.?_2RN_ 5»?i.~?i. _ ^iSJ[-02_ _PC I XL
25 ^^4P" OT7""05" 8 97 "2 """ " "~ "~ " "
°8 ON~ °5 ?1 7<*
SIZE- OFF- 05 23 74 1125
GRAND JCT~C"OLO"7~ ~ 1?22"*"N$~."2£^5\ 7.3E-02 PCT/i
25 0?4C 077 05 R 97 t _
nr?61 "0fV&~OT~"Jl8~ " "ON- 06 10 74 1340 " """ " "" " ".""
__SI7f:^ OFF- 0Y8 ON- 07 ,''4 74 120
OFF- 07 ?h 7<* 1340
GRAND JCT COLO
~25"024?, 077 05 8 97 p
111669 Of)k06 018 ON- 08 12 74 1355
S17F- OFK- lift 14 74 0915
- —- • 56
-------
JCT COl.pPAOp. 222RW PE
_COJLP_HAPQ._ RF.POPTED 7S/07/08
•ANALYSIS PP.SULT—-i?Sir,MA—UNITS
" GPANO""JCT "COLO" "~ " "?2?~RN 9.2F.-0"1 " 7."§r-OT~ PCI/L
25 0240 077 05 8 97 ?
~T34345TOOROT""018 ON- 09 09 1* 1058
SIZf- _.PFF- 09 11 74 0947
GRAND JCT COLO ?2?p>! 5»^.E"01 5.8F.-02 PCI/L
~^~52^0""fl7"7~"0!T8'~97 ? " ~~ "" ~"" " " " ~ " " ~ ' "
134947 ppPOa 018 ON- 09 30 74 1025
" ""SIZE-" "~ OFF- 10 02 74 1025 " " " """ "" "
T,TflfNTT JcT'TCLO"' 222W" S.SE-'O'I7o7f>02 PcT/L
25 0240 077 05 8 97 ?
T35T5T-OD~309~1H8" OH-TO" 15 74 113G" ~~ "
SIZE- OFF- 10 17 74 1020
GRAND JCT COLO 222&N U2EOO 8.8E-02 PCF/L
'"077""05"&""97" """2 "" ~" " ;
OOR10 018 ON- 11 04 74 1245
~ OFF- 11 06 74 1005 "~ ~~"
GRAUD "JCT COLO " ?2?RN 2.7COO"" V.3F-01 PCf/L
25 0240 077 05 8 97 ? _
l4lO?0 ODPil 018 "ON- 12 02 74 1010 """ "
SIZE- OFF- 12 04 74 1155
GRAND JCT COLO 222HN 1.1EOO 8,2F-02 PCI/L
1414J8 ODP12 fi!8_ ON- 12 31 74 0920
" "" ~~~6FP-""6l' 0^ 75 0925
25 0240 077 05 8 97 ?.
141L718"l>TWn VTB ON-"01~07 75 1005
SIZE- OFF- 01 09 75 1000
GWANO JCT COLO 2??^N 4.0E-01 5*5^-02 PCI/L
^^~U?47r"077"l}5"7ri37"" ?""" * ~"" " " " ""
14?31R OOP1* 018 QW- 01 27 75 1105
01 ?9 75
25 0?40 077 0^ 6 97 ?
~T4T9TB~'n!fPli;"iyV8~"" "ON- 02 lh 75 1010 " " ~ ~ """
^IZF- OFF- 0? 20 75 1100
GRAND JCT COLO 222KN 3.3F.-01 4.9F.-02 PCI/L
25 "02*& 077 "05"~A <57 t ''"
143^18 00^16 018 ON- 03 10 75 1130
~~S"T7r- — OFF- 03 1? 75 i040 " " •""""
— -- 57 - ^
-------
COLORADO 222RN RESULTS
COLORADO REPORTED 75/07/08
....-.—.—----———...—...- . ...ANALY5Is.,.RpSULf~--2SIGMA---UNlTS
GPANO~'~JCT COLO" .. "" 222HN"~ 2.7E-OT4V5E^02' PCI/L
_?!> 0240 077 05 8 97 ? _
144018""ODH"17" 018" ON- 03 31 75 1210 "~ "" ' """
SJ7E- OFF- 04 02 75 1100
__GRAND_JCT COLO _ _ 222RN _ S,7E>OJI _ 6,5*>02 PC_IA
25 6240""077~"65~8"97~ 2"" -.-•— - ----- - -
130651 OOP 01 019 ON- 04 29 74 1328 __
SIZE- " " OFF- 05 01 74~ii3o- ~'~ "" "" " ". •'"
GRAND" JCT ~COl_~0" 222KN 3i6E-02 ~ H7!T^02~ PC I/L.
_ 2^_?_?_4f! P_77. °.r * ?.I ?.
131587"ODR02 019 ON- 05 21 74--JJJQ-- - "" - -- -
S.IZE^__ OFF- 05 23 74 1117
_ <*MM> JCT COLO ???RN *• ?.?•?! 5•?!"?.? 'jPCI/L
"25 0240 077 05 6 9? ?
13?395 ODR03 019 .9^06 24 74 1550
SI7E- "" OFF- ~0~6 ?6 T4~~fl25~
""GRAND JCT COLO ~ ~~222^N 3«4E-Oi S,6E-0?!'~ PCI/l
__^.? 0240 077 05 8 97 2 __
132591 ODR04 019 ON- 06 30 74 1550
SIZE- OFF- 07 02 7^_1315
GRAND JCT COLO ?2?_RN *»?E_-pl 5.3E-j02_ JPCI/L
250240 077 05 8 97 2
L3324_l_onwO_5 019 ON- 07 24 74 1310
"SIZE-"""^ " " OFF- 07 26 74 1350 "" " ." "" "" "". •
GRAND"~JCf'~cb'LO " "2'2"^'»"N " .V.W-^OT 5~."W=TJ2~""P"CI/I
25 0240 077 05_fl_97 •? _ _ _
13367 7<> 0935
Jj"AMO__JCT COLO _ 222PN _ 6.»7f--01 6.4F-02 PCT/t.
^34?01 pp»07 01*5 ON- 00 03 74 1135 _
""SHE'-"" "" OFF- "09 05 74 lo3S "'" ""
GRAND" JCT COLO " ' '' 2'22'KN ?V.9i:-Ci fl,UT-02 "PCl/l
• ?5 0?4U 077 05 6 97 ?
T3'S7?;F~of>»"0"B"'0"i'9 • ON- 00 ^3 74" 1155 "" %
_^_ Sj_7e_- OFF- 09 25 74 0955
GRAND JCT COLO 222>M ^«^-^J _ l»T!l'?.? ^I/!
^25 0240 077 0*5 8 97 ^
L35148 OD' 09 019 __ CM- 10 IS 7^ 1210 __
Sl7F-"~ " ' ()FF- "1 0'1 7 74 1030
58
-------
GRAND JCT COI..OWADO .??2«N RESULTS
COLORADO REPORTED 7S/07/08
GRAND JCT'COLO
0 077 05 8 97
"' ~
•A N A L Y SI S—T' F. S UL t—- ? S! ^ M A—U n \ T S
222"«"N 4V3f:-61 5^"2E-02~ Pcf/L
SIZE-____;__•,__'_:;
GRAND JCT COLO
ON!-~ 11 0V 74 1145
OFF- 11 06 7<» 1000
222«N
U2EOO 8.SF-02 PCI/L
25 02*0 077 OS 8 97 ?
?L9ot?1l 01_9_ ON- 11 ?<» 74 U25
SIZE"- " ~~ OFF- 11 ?6 7<» 1605
222RN
~PfT/L
25 0240 077 05 8_ 97 ?
19 00^17 ~iTT^ ' ON-
SZE-
s
JCT COLO
25'0?40 077 05 8 97 ?
HI 7 19 OORU 019 ON- 01 07 75 1020
ST7F- .....
*" PCI/L
OFF-
JCT COLO ~ "
25 02/*«) 077 05 8 97 ?
tt'iQ~ ..... " ON- 01 ?7 75 1125
PCl/L
GPAND JCT COLO
077 OS fe 97 ....... 2 "
QO_R|5 019 ON- 02 16 75 1025
SI7F- " OFF- 02 20 75 1050"
222RN
PCI/l
25 0240 077 05 8 9> ?
I5"32T*~oOPl6~'Or9' ...... ON- 03 "I'O ?5
r,izr:- OFF- 03 i? 75
GRAND JCT COLO
— 25 ..... tf'?4Tr077
i 00fjl7 019
ON- 03 31 75
OFF- Ou C? 75
1 100
1030
1150
1055
222WN
^.6E-01 5.5F-02 PCl/L
"6WNO JCT COLO
25 0?'-»0 077 05 6 97
222«N
9.3F-01 7.7F-0?" PCI/I
SIZf-
"ON- 04 ?9 7A
OFF- 05 01 7^
1318
1120
GRANH JCT COLO
~?5"<}.>U' 077 05 B 97 ?
1315PM p'l^flc 020 ON- Qt tl 7<»
SHF- " ......... " " OFF- 05 23 74
?22f-
-------
_f'RAMQ JCT.COLORADO 222RN RESULTS
COLORADO REPORTED 75/07/08
GRANO JCT COLO
j?5 . _0.?*P 077 Q5_ 8 97 2
•ANALYSIS'—RESULT 2SIGMA UNP
222RN Si4EH)T5T8l>02PcT/
. _. _
131962 ODROlC20 ON- 06 10 74 1645
SI7E>__ OFF- 06 12 74 1045
222RN
3,lt-0l 5.3E-02' PCI/
__. _ _
"?5'0?40"077"05""8~9"7 2 ..... " ....... - - -•
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...... SIZE- " ~ OFT- 07 62 74
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__ COLO___;
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5.0E-01
F02. PCI/
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25 0240 077 05 8 97 ?
134202 "onROTopO ON- 09 03 74 1145
SIZE- OFF- 09 05 74 1045
NO-5AMPLE
J..CT C0.LP ___ ___ _ _
25 024TT"OT7 05 8 97 2"
__ 134763 pnfJQ8 020 ___ ON- 09
JCT COLO
OFF'- 11 ?6 7<» 0955
_
25
_
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f;?0 ON- 01 07 75 1015
...... "
6.2O01
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60'
-------
. .-.tQ.T.COLpPADO..?22_HN RFSi'-LTS
COLORADO HEPOHIF.;) 7S/07/08
ANALYSIS --- WfSULT ---- 2SIOMA-- -
T" COLO ................. ..... ~'~ 2T2HNT 473T-01 5o~2T-0?~ PC!/!
0?»0 077 05 8 97 ? __ ___
()0»15" p>6 ON- 01 ?7 75 1120
SIZE- ______________________________ OFF- Ul 29 75 1000
GPAND JCT COLO 222RN 6.7E-01 603F-02 PCI/L
25
OOHl5_0?_q ON- 0? IB 75 1035
SIZE- " ......... " OFF- M "?0 75
O4C 077 05 8 97 2_
'OR- OTT7" 75
OFF- 03 19 75 0920
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01
-------
TECHNICAL REPORT DATA
(Please read Instructions on the reverse before completing)
1. REPORT NO.
ORP/LV-77-1
2.
3. RECIPIENT'S ACCESSION-NO.
4. TITLE ANDSUBTITLE
Outdoor Radon Study - An Evaluation of Ambient
Radon-222 Concentrations in Grand Junction, Colorado
5. REPORT DATE
April 1977
6. PERFORMING ORGANIZATION CODE
7. AUTHOR(S)
David L. Duncan
George A. Boysen
8. PERFORMING ORGANIZATION REPORT NO.
Lee Grossman
Gustav A. Franz III
9. PERFORMING ORG \NIZATION NAME AND ADDRESS
Office of Radiation Programs;- Las Vegas Facility
U.S. Environmental Protection Agency
P. 0. Box 15027
Las Vegas, NV 89114
10. PROGRAM ELEMENT NO.
11. CONTRACT/GRANT NO.
12. SPONSORING AGENCY NAME AND ADDRESS
DAA for Radiation Programs
Office of Air & Waste Management
U.S. Environmental Protection Agency
Washington, D. C. 20460
13. TYPE OF REPORT AND PERIOD COVERED
Final
14. SPONSORING AGENCY CODE
200/03
15. SUPPLEMENTARY NOTES
16. ABSTRACT
This report presents the results of measurements of ambient
outdoor radon concentrations around the Grand Junction, Colorado,
uranium mill tailings pile during the period of April 27, 1974 to
April 2, 1975. A similar study was done by the U.S. Public
Health Service in 1967 and 1968 before the pile was stabilized,
and this study was done after the pile was stabilized to determine
the effects of stabilization. Air samples were collected over a
48-hour period in a Mylar bag which was sent to the laboratory
for radon analysis, using alpha scintillation cells. Samples
were collected at each of 20 stations every three weeks for one
year. The samples collected on the pile had higher radon concen-
trations following stabilization, and the exact cause for this is
not known. Radon concentrations in the predominant daytime wind
direction had elevated radon concentrations which are a power
function with distance. Samples collected in other directions
away from the pile contained background concentrations of radon.
17.
KEY WORDS AND DOCUMENT ANALYSIS
DESCRIPTORS
b.lDENTIFIERS/OPEN ENDED TERMS
c. COSATI Field/Group
Radon
Radon progeny
uranium mining & milling
radiation surveys
environmental surveys
0705
1807
1808
18. DISTRIBUTION STATEMENT
Release to public
19. SECURITY CLASS (ThisReport/
Unclassified
21. NO. OF PAGES
68
20. SECURITY CLASS (Thispage)
Unclassified
22. PRICE
EPA Form 2220-1 (9-73)
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EPA Form 2220-1 (9-73) (Reverse)
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