DRC-2001-001021 - 0901a06880805789

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NES}IAPS RADON FLUX MEASUREMENT PROGRAM
White Mesa Mill, 2000
Prepared for:
International Uranium (USA) Corporation
6425 S. Ilighway i-9L
Blanding, Utah 84511-
Prepared by:
TeIfco Environmental
L23l- N. 23 St., Ste. 206
Grand Junction, Colorado 81505
February 2001
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2.O
3.0
4.0
5.0
Table of Contents
INTRODUCTION
SITE DESCRIPTION
SAMP],ER DESCRlPTlON
F]ELD OPERATIONS
4.L ceneral Site Specific fnformation
4.2 Sampler Placement
4.3 Sampfer Retrieval
4.4 Site Exit
4.5 Environmental Conditions During Measurement Periods
LABORATORY OPERATIONS
5.1 fntroduction
5.2 Apparatus
5.3 Analysis Procedure
5.4 Weighing and Background Counting
5.5 Receipt and Weighing of Exposed Charcoaf
5.6 Gamma Ray Counting
5.7 Qual-ity Control Sampfes
5.8 Data Val-idation
5 . 9 Calcul-ations
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6.0 SAMPLE RESULTS/CALCUI,ATIONS
Figure 1, Large Area Activated Charcoal Col-fector Di-agram
APPENDICES:
A - Support Documents
B - Recount Data
C - Radon Flux Sample Laboratory Data and Field Blank Data
D - Map Pocket, Figure 6-1
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NESHAPS RADON FIIIIX MEASURE!{EMI PROGRAM
fnternational Uranium (USA) Corporat,ion
white Mesa Mi1I
6425 S. Hwy. 19J-
Blanding, Utah 845L1-
1.0 INTRODUCTION
Te1lco Environmental L.L.C. (Te11co) provided support to fnternationaf Uranium
(usA) Corporatlon (hereinafter, ruc) regardi-ng their required National Emission
SLandards for Hazardous Air Pollutants (NESIIAPs) Radon Ffux Measurement effort on
Tailings Cefls 2 and 3 at the White Mesa MilI uranium processing faciliLy in
Blanding, Utah for the calendar year of 2000. These measurements are required of
IUC to show compliance with 40 Code of Federal Regulations, Part 61, Subpart W,
National Emission Standards for Radon Emissions from Operating Mi11 Taitings. AL
present, there are no Subpart T uranium mj-lI tailings aL this site. As required
by the regulations, the NESHAPs monitoring for existing mill tailings piles is a
flux standard that limits the emission of radon from piIes. The standard limits
the amount of radon that can be emitted per unit area (m') per unit of time (s).
This standard is not an average per faci11ty, but is an average per radon source.
According to subsection 61-.252 Standard, (a) radon-222 emissions to ambient air
from an existing uranium mill tailings pile shafl not exceed 20 pCi/m2-s of radon-
222. Subsection 61.253, Determining Compliance, sLates that: ',Compliance with
the emission standard in this subpart shal-l be determined annually through the use
of Method 115 of Appendix 8."
Telfco was contracted to provide radon cofl-ect.ors, perform the field
placement/retrieval and sampfe analysis of the coffectors for caLendar year 2000.
This report addresses Lhe procedures employed to obtain the resufts presented in
Section 5.0 of this reporL.
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2.0 S]TE DESCRIPTION
The White Mesa Mil-1 is focaLed south of Blanding, Utah on Highway 191. The mi-ll
began operati-ons in 1980 for Lhe purpose of extracting uranium and vanadium from
feed stocks. processing effluents from the operation are deposited in four
"lineclrr celfs, which vary in depth. Cells 1 and 4 are used solel-y for "liquor"
storage, while Celfs 2 and 3 are used for sand tailings/liquor deposition-
Ce1l 2 has a totat area of approximately 270,624 square meters (m') " This cell
was comprised of two source regions that required NESHAPs radon monitoring:
approximately 246,423 m2 of the cel-l had a soil cover of varying thi-ckness, with
approximateTy 24,20a m2 of exposed t.ailj-ngs "beaches". There was no significant
standing liquid in "low" elevation areas within Cell 2 '
Cell 3 has a total area of 288,858 m2. This ce1l was comprised of two source
regions that required NESHAPs radon monitoring: approximately 104,843 m2 of the
celf had a soif cover of varying thickness, with approximately 63,995 m'of
exposed taillngs ,'beaches',. The remaining approximately L20,O2O m2 was covered by
standing liquld in "Iow" elevation areas.
Due to worker health and safety concerns expressed by both fUC site personnel and
Tel-fco monitoring staff, a smaI1 portion of the areas of the wet beaches of Ceff 3
were not sampled due to the extreme instabi-lity of wet taiflngs beaches.
3.0 SA]VIPLER DESCRIPT]ON
The Large Area Activated Charcoal Canisters (LAACC) used by Tel]co personnel to
perform the required radon measurements were fabricated in conformance with "Radon
Ffux Measurements on Gardinier and Royster Phosphogypsum Piles near Tampa and
Mulberry, Fl-orida" (NTIS Document #PBB6-a618'14) as referenced in 40 CFR, Part 61.
Method 115, Appendix B. This method of performing radon flux measurements
involves the adsorption of radon on activated charcoal- in a large-area coflector-
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The charged colfector is placed dlrectly on the
and is aflowed to cofl-ect, radon for a glven time
The radon collected on the activated charcoaf is
spectroscopy.
material surface to be measured
period (approximately 24 hours).
Lhen measured by means of gamma
Each LAACC was constructed using a 1O-inch diameter PVC end cap, spacer pads,
charcoal distribution grid, retainer screens, pads, and a steel- retainer ring (see
Figure 1).
prior to deplo1.rnent, each collector was charged with 180 grams of baked charcoaf
from seafed individual sample containers (reference Section 5.0 below for
laboratory procedures). After the 24 hour measurement peri-od, the exposed
charcoal was transferred to the plastic sample containers, sealed air-tight (with
tape), labeled as to sample identification along with exposure times/dates, and
transferred to the Te11co laboratory (Grand Junction, Colorado) facility for
analysis .
4.0
4.1
FfEI,D OPERATIONS
General Site Speciflc Information
Tellco personnel laid out basel-ines within the cover regions of Cells 2 and 3, and
a grid coordinat-e location system was developed Lo accommodate locaLing the
samplers in the fie1d.
The sampling effort commenced on the morning of September 19, 2000, after site-
specific heafth and safety Lraining was provided by IUC Health and SafeLy
personnel earfier that morning. Tel-l-co field technj-cians 1aj-d out the grid system
on Cel1 2 and Ce]] 3 using a measuring tape, pacing, and line-of-sight markings.
Boundary distinctions between the source regions were estabfished by visual
inspection and so noted on the field maps. Teflco personnel placed a
minimum/maximum thermometer in the immediate vicinity of the two cel-1s duri-ng
sampling, measuring ambient air temperatures at the site to monitor compliance
with the 35oF measurement criterion-
f -in. Thick
Scrubber Pad
1/2-in. Thick
Scrubb*r Pai)
l.r2-in Ihrch Charcool
Support Grrd
ftGURE I Large-Aren Radon Collector
BelarnSr
Spring
\
10-in. dia
PVC End CaP
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4.2 Sampler Placement
Radon measurements were made in conformance with methods described in NTIS
Document #pB85-1518'14 for each 100 sample measurement set for each source region.
In addition to the 100 samples, each sample set consist-ed of 5? field blanks. The
spacing distribut.ion for each set of 100 measurements was determined by visual
means and a I'best. fit" distribution pattern for each source region. Field
personnel safety was paramount in the distribution of samplers over "wet beach[
regions due to the loose, unconsolidated condition of the saturated tailings,
which are simil-ar in consistency to ,rquicksand.',
Placement/retrieval of coffectors was accomplished using vehicles where possible,
and by foot travef where vehicle travel was not feasible.
A coll-ector was chosen and the retaining ring, screen and
and gently placed face
to I'push" the device
the surface using a
material (either tailings or soil) to reduce difution due
within the col-lector.
A sample identification number was then assigned to the collector. Sample numbers
utilized an alpha-numeric system composed of the charcoal batch fetter (i.e., A,
B, C .) followed by a sequential number indicating the placement (i.e., 01,
02, . ) . This sample identification number was recorded on an adhesive 1abel
and placed on the top of the col]ector, The sample ID, date, and time of
placement were recorded on a master data sheet for each seL of measurements "
expose the charcoal support grid.
from a batch, opened and distributed
The coflector was then re-assembl-ed
be measured. Care was exerci-sed not
The collector rim was ,'seaf ed,, to
A pre-measured charcoal
evenly across the area
foam pad removed to
charge was selected
of the support grid.
down on the surface to
int.o the soil surf ace.
berm of locaf borrow
to air or wind currenLs
blanks were coll-ected.
col-fector with charcoal,
remained in the sealed
During placement of charcoaf flux coflectors, five field
The procedure for preparing a field blank was to charge a
and place it inside an airtight container. The blank(s)
collector for the 24-hour sample time period.
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4.3 Sampfer Retriewal
Retrieval of the collectors folfowed the same pattern as placement. The
colfectors were disassembled and the charged charcoal removed by pouri-ng from the
coflector into a large funnel suspended abowe a sample charge container. The
sample ID number was Lransferred to the charge conLainer, whj-ch was seafed and
placed in a box for transport. The date and time of retrieval were recorded on
the same data sheet as the sample placement information.
Each charged coll-ector was retrieved upon completion of Lhe measurement time
period (approximately 24 hours). Upon retrieval of the colfectors, the field
blanks were retrieved and the charged charcoal returned to a conLainer, sealed,
and fabefed as such, and returned for analysis along wit.h the measurement set.
Sample data sheets accompanied the shj-pment to the laboratory. During the
retrieval and containerizatj-on process, a few of Lhe charcoal samples were losL
due to spillage of the charcoal. The l-ost samples were as follows: one sample
(A65) from the Cel1 2 Beach region, one sample (857) from Lhe Celf 3 Beach region,
and three samples (D84, DB5, and D90) from the Ce1f 2 Cover region.
Tellco personnel maintained custody and assured timeJ-y delivery of the samples to
the Tellco Grand Junction laboratory for prompt analysis of Lhe charcoal samples.
4 .4 Site Exit
Tellco field personnel and
resulting from fieldwork
surveyed and released for
eguipment were alpha scanned for possible contamination
activities. A11 equipment and field personnel were
unrestricted use by IUC's Health and Safety personnel.
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I 4.5 Environmental CondiLions durj-ng Measurement periods
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(b)
Referencing 40 cFR, Part 5t-, subpart w, Appendix B, Method 115 - Monitoring for
Radon-222 Emissj-ons, Subsectiori 2.1-4 - Restrictions to Radon Ffux MeasuremenLs,
"Lhe following restricti-ons are placed on making radon flux measuremenLs:
(a) Measurements sha11 not be initiated within 24 hours of a rainfall
If a rainfalf occurs during the 24 hours measurement period, the
measurement is invarid if the seal- around the lip of the collector
has washed away or 1f the collector is surrounded by water.
(c)Measurements shall not be performed if the ambient temperature is
below 35oF or if the ground is frozen.,'
Site Specific Discussion
(a) Prior to commencement of any sampler placement, rainfafl amounts (if
any) were ascertained at the lUC weather staLion rain gauge and/or at
the rain gauge placed in the immediate area by Tellco fie1d
personnel. Rainfall occurred at the site overnight 9/1"7-9/L8/OO
measuring 0.LL", folfowed by a brief shower at about 1:00 pM on
9/aB/O0 measuring 0.02". This caused a delay of the placement of
canisters on Ce11 2 Beach region until 1:00 pM on 9/79/oo. Another
rainfall event measuring 0.05" occurred after the placement of
canisters on the Ce]] 3 Cover region on 9/21,/OO; however, both IUC
site personnel and Utah State personnel concurred that this
precipitation shoufd not. cause a delay the deplo1.'rnent of canisters on
the Ce1l 2 Cover region on 9/22/00-
The aforementioned rainfall measuring 0.05" did not wash away any of
the seals of col1ectors already emplaced on the Cel,1 3 Cover region,
nor were any of the collectors surrounded by water.
(c)During alf 24-hour sample set placements, the minimum ambient air
Lemperature recorded by Teffco at the sj-Le was 41oF, recorded
overnight 9 /22-9 /23 / 00.
5.0 LABORATORY OPERATIONS
5.1 Introduction
(b)
Activated
determine
canister
act ivat.ed,
charcoal gas adsorption collectors are passive sampling devices used to
the f]ux rate of radorr-222 gas from a surface area. The charcoal
used consists of a 10-inch PVC cap containing a bed of 180 grams of
granular charcoal, placed in a distribuLion gri-d on top of a 1% inch
of
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thick layer of foam and secured under a !/z inch foam layer and a gal-vanized steel
screen by a retaining ring"
Sample collecLion is initiated by placing 180 grams of unexposed charcoal from a
sealed container into the above described canj-sLer and, after securing the
retaining ring, placing the canister (open face dovrn) onto the surface to be
tested. Radon gas is adsorbed on the cont.ained charcoal and subseguent
radioactive decay of the entraj-ned radon results in the occurrence of radioactive
lead-214 and bismuth-2l- in the canister.
These radon progeny i-sot.opes emiL characteristic gamma photons, which can be
detected. The original toLaf activity of the adsorbed radon can be calculated
from these gamma ray measurements using empirical cal-ibration factors derived from
cross-cafj-bration of source sLandards containing a known total activity of radium-
226 in a geometry identicaf to the samples to be counted.
a
5.3
Apparatus
Single- or multi-channel pulse height analysis sysLem, Ludlum Model 2200 with
a Teledyne 3" x 3" NaI(Tl) detector.
Lead shiefded counting well approximately 40 cm deep with 5 cm thick lead
walls and a 7 cm thick base and 5 cm thick top-
NIST traceabfe aqueous solution radium-226 absorbed onto 180 grams
activated charcoal caLibration source -
ohaus Model C501 bal-ance with 0.1 gram sensitivity-
Analysis Procedure
rnspection of the Charcoal Container
Charcoal- was received at Lhe analytical
contalners. Upon receipt, the integrity of
i-nspection of the plastic container.
laborat-ory in the seal-ed sample
the container was verified by visual
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Sample Identif ication Numbers
Each sample conLainer had a unique sample identification number, which was
determined in the fie1d, and written onto a label attached to the sample
conLainer.
Drying and Recycling
Afl charcoaf was dried before use in Lhe field for radon flux measurements.
Procedures were the same for newly prepared charcoaf and for charcoal recycled
after field use" Charcoal was dried at approximately 110oC. Drying procedures
were as foflows:
Oven temperature set to 110oC.
Charcoaf placed in the oven in a meta1 baking tray
Baked for 24 hours.
Immediatefy after the tray was removed, approximately 180 grams of charcoal-
were transferred into clean sample containers and sealed with pl-astic tape.
5.4 Weighing and Backqround Counting
Proper balance operation was verified daily by checking with a standard weight.
The balance readout should agree with the known standard weight to within + 0.1?.
If a discrepanL readout was obtained, the bafance was re-zeroed, the check weight
wiped with a soft, lint-free c1oth, and re-weighed. Tf the discrepancy persisted,
the balance would have been removed from service and tagged "Out of Service. " For
this project, the scale conformed for each day of use (See Appendix A, Bafance
operation Daily Check form).
After acceptable bal-ance checkout, each empty container was j-ndividually placed on
the bafance and the tare weight of the conLainer was documented to the nearest 0.1
grams on the labef. The scale was re-zeroed with the container on the balance.
Charcoaf was carefully added to the container until the readout registered 180.0
grams " The lid was immediately placed on the container and seal-ed with plastic
tape. The Lape was stretched slightly while wrapping around the container. The
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end of the tape was folded Lo form a tab for easy Lape removal
checked for readout drift between each container-weighing step-
The balance was
Gamma ray counting system checkout was performed as described in Section 5.5.
Three five-minute background counts were acquired for five containers selected at
random to represent each "batch. " Each sealed container was placed individually
in the shiel-ded counti-ng wel1, with the bottom of the container centered on the
detector. observed empty counting well background counts must fal1 wlthin the
ranges established for the aforementioned l,udlum/teledyne counting system with
shielded we11.The background count rate was then documented for the
representative containers, and subsequently documented on the respective "Radon
Flux Field Data Sheet,' for that batch. If the background counts were too high to
achieve a sufficiently 1ow sensitivity 1eve1 (Lower Level, of Detection, LLD), the
entire batch was labeled non-conforming and recycled through the drying process "
5 .5 Receipt and Weighi-ng of Exposed Charcoal
Containers of exposed charcoal were transported from the site and deliwered to the
laboratory for analysis by Te11co personnef. The Te11co laboratory staff was
responsible for weighing and inspecting the exposed canisters,' inspecting the
documentation forms; and entering the required data documentation to database
spreadsheets .
When the containers were received, the following items were j-nspected:
o Container was closed and sealed with tape.
r Container was not damaged.
. Data sheet was complete.
r Discrepancies found during this inspection were documented on the data sheet
Containers recelved open or
and were noL analyzed. A11
were received there in good
damaged resulting in seal faifure were considered void
samples that were transported to the Tel1co laboratory
physical condi-tlon.
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After receipt inspections, conforming containers were
nearest 0.1 gram and the gross weight was logged on
Sheet" under the appropriate column.
5.6 Gamma Rav Countinq
Source/Background Checks
The charcoal gamma ray counting system
when used. These checks included
measurements. (Appendix A of this
performance check records. )
weighed on a balance to Lhe
the "Radon Flux Fiel-d Data
was subjected to performance checks daily
background and radium-225 check source
report contains daily counti-ng systemI
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Sample Analysis
o The length of count time was determined by the activity of the sample being
analyzed. A data quality objective estabfishing a minimum accruement of 1000
counts for any given sample was followed during sample analyses.
The sample conLainer was placed in the counting welf with the lid side up and
the center on the NaI detector and the shielded well door was set into p1ace.
one sample counL was accrued and the mid-sample count time and date was
documented on the field data sheet.
5-7
The sample counts were documented on the field data sheeL for daLa reduct-ion.
The above steps were repeaLed for each exposed sample collector.
Approximately 10t of the containers counted on a given date were sel-ected for
recounLing. These containers were recounted on the next day after the
original analysi-s using the procedure descrj-bed above.
Oualitv Controf Sampfes
Charcoal ffux measurement QC samples included the following intra-laboratory
analytical objectives as required in 40 CFR, Part 6L, Subpart W, Appendix B,
Method 1-L5, 4.O - Quality Assurance Procedures for Measuring Ra-222 F1ux, D.:
recounts, 10*, and
field bfanks, 5*.
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5.8 Data Vafidation - Recounts/Blanks
A11 sample canister data were subjected Lo valj-dation protocols. The following
presents the data validation resufts:
Forty recount measurements were performed by conducting replicate analyses of
individual field samples. These recount measurement.s comprised approximately 10t
of the total number of samples analyzed. The precision of aff recount measure-
ments ranged from fess than 1t to 7.32 with an overall average precision of
approxlmately 2.3?. The aforementioned recount precision values are well within
the expected variability of the analyticaf method.
Twenty field bfanks were analyzed by measuring the radon progeny activity in
samples subjected to a1l aspects of the measurement process, except.ing exposure to
the source region. These blank sample measurements comprised approximately 5% of
the field measurement.s. The results of the blank sample analyses measured radon
flux rates, which ranged from 0.04 to 0.09 pCi/m'?-s, with an arithmetic average
flux rate of 0.07 pCi/m2-s. This corresponds Lo less t.han 1t of the regulatory
limit of 20 pCi/m'z-s-
The objectiwe is 100 samples to
regulations. The following is
sampling program (EPA rufes
objective) :
be col-fected from each region, as specified by the
the actual completeness attained during Teflco's
and regulations specify an 853 compleLeness
Ce11
Ce11
Cover
Beach
Cover
Beach
2,samples - 9'7*
samples = 99*
- 100 samples = 100?
- 99 samples = 99\
actual OC val-idation
completeness
completeness
completeness
complet.eness
met the objective parameter requirements
2,
o Celf 3,
r Cel-l 3,
As presented above,
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5.9 Calculations
Radon flux rates were calculated for charcoal collection samples using calibration
factors derived from cross-cafibration to sources with known total activity wiLh
identical geometry as the charcoal containers. A yield efficiency factor was used
to calculate the Lotal activity of the sample charcoal conLainers.
In practice, radon flux rates were calculated by a database computer program. The
algorithms utilized by the data base program were as follows:
Equation 5 .1:
pci Rn-2z2/m'sec =ITs*A*b*0 .5 (d'le1 7s) ]
where:N=
Ts=
b=
Equation 5.2:
ErroY,2o:2x
net sample count rate, cpm under 220-662 keV peak
sample duration, seconds
instrumenl calibraLion factor, cpm per pCi; values used:
0.1584, for M-01/D-21 and
o.L734, for M-02/D-2o
d = decay time, elapsed hours between sample mid-time and count
mid-time
A = area of the collector, m2
x Sample Concentrat.ion
Net,cpm
Gross Sampf e, cpm * JryLg."""d S"*pf .,"p*
SampleCount,t , min Background Count ,t , min
(a)
(b)
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Equation 5.3:
_ 2. 7_1_+ _14- 65)_lEbI-LLD=ffi
where: 2 -7a =
n ac
e-
Te
L_
d=
constant
confidence interiral factor
standard deviation of the background count rate
sample duration, seconds
instrument calibration factor, cpm per pCi; values used:
0.1684, for M-01/D-21 and
0.1734, for Nl-02/D-20
decay time, elapsed hours between sample mid-time and count mid-time
area of the colfector, m2
5.0 SAMPI,E RESULTS/CA],CIILATIONS
Referencing 40 CPR, Part 61. Subpart W,
Rador1-222 Emissions, Subsection 2 .'l-.7
each region of the pile and for the toLaf
follows :
Appendix B, Method 115 - Monitorlng for
Calculations, "the mean radon flux for
pile sha11 be calcul-ated and reported as
The individual radon ffux calculations shall be made as provi-ded in
Appendix A EPA 85 (1) . The mean radon flux for each region of the
pile shaI1 be cafcul-ated by summing all indiwidual flux measurements
for the region and dividlng by the totaf number of flux measurements
f or the regi-on.
The mean radon fl-ux for the total uranium mil1 tailings pile shalf be
cafcul-ated as follows:
Where: J= = 1qg4n
Ji = Mean
Ai = Area
A. -- Total
flux for the totaf pile (pci/m'?-s)
flux measured in region i (pci/m'z-s)
of region i (m'z)
area of the pile (m')
2.7.8 Reportlng. The results of individual ffux measurements, the
approximate l-ocations on the pi1e, and the mean radon flux for each
regi,on and the mean radon flux for the totaf stack tpilel shall be
incfuded in the emission test report. Any condition or unusual event
that occurred during the measurements thaL coufd significantly affect
the results should be reported. "
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Site Specific Sarple Results
(a) The mean radon ffux for
(reference Figure
each region within
5-1)
each
on
on
cef f
7 .9 pCi/m'z-s (based
23.5 pCi/m'z-s (based
is as follows:
246t423 m' area)
24,20L m' area)
CeIl2-CoverArea
- Beach Areas
CeI13-CoverArea
- Beach Areas
- Standing Liquid Areas =
14.1 pCi/m'z-s (based on 104,843 m2 area)
22.2 pCi/m2-s (based on 63,995 m2 area)
0 pCi/m'z-s (based on 120,020 m2 area)
Note:Reference Appendix B of this report for entire summary for
individual measurement resulLs and specific sample region maps.
(b) Using the data presented above, we have cal-cufated the total mean radon flux
for each pile (cel1) as follows:
Ce]] 2 = 9.3 pCi,/m'z-s
('1 9\ ()46 421\ + ()1 B) (?4 ?o1)
Cell 3 =
210,624
10.1 pCi/m'?-s
(14.1) (104.843) + (22.2) (53.99s) + (0) (120.020)
288, Bs8
15
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APPENDTX
Support- DocumenLs
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Pre
f05+
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CHARCOAL CANISTER ANALYSIS SYSTEM
srrElocArlel.{. V.{h,*e Mvsa M"ti,E('qrJ""'l , t[T
cunNr, -T a{t r- nr,,J',onrr^ I Vnaq',u, ,n Lq511) ( o rP.
Calibration Check Log
systemlD n-Ot /D-2- I calibrationput"' 4(zc'{Oo DueDate:"-_-_____1
4(=ulet
scaler SA.{: 5 r 5 -l 2- f- Pt - " ,)High Voltage: i O 5 o Window: +'4-L Thrshld: 7' 2 o
Detectorsnr: pl-t533 (D-z\ sourceID/SN, ?^t"/e S o{SourceActiviry: 59.3 KP(;
Blank CanisterBkgd. Range, cpm'. 2 " = I I b to rSf) 3o: lOg to \58
Gross Source Range, cpm:z": 44L\ to ie5<a4. 3a: ot'1"7o to to-? 22-
Technician:
ylr,'. y - average background and source cpm falls within the control limits.
n : average background and source cpm does not fall within the control limits.
The acceptable ranges were determined from prior background and source check data.
All counts times are one minute.
DATE BY BKG
#1
BKG
#2
BKG
#3
BKG
AVG
SOURCE
#1
SOURCE SOURCE
#3
SOTIRCE
AVG.
ok?
yln
9lz-c I oo T)T.Z t3Z t2-1 iz5 tL8 t05o9 y o //-/v r C A-oL t o4s-L Y
ql-? t loo >/-e-t2-+ril r'3 r tLq to5\1 I o A-dtot io5L1 r o51cz
4l-zzloo D/-<-iat rV'7 tAs r3ts to41t to4'1 3 t rtLlt-' r-t -4r 7
4lt-tIoo >14 l4lp i38 rz-4 r.1'k iA z-61 104a7,tO Zvl to 32-1
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CHARCOAL CANISTER ANALYSIS SYSTEM
srrElocArvgN, \Al 1",',1-e Ms+o, IA', l\, BI"^J',.g, t4T
crrnNt, a-^kr n ,i, o n r, I l-\ r,rv, r,',- i"i (q >*\ C o,r P
Calibration Check Log
Systemtr' M-ol / D zf CalibrationDate:4lz-c I oo DreDate: 4lzo lot
ScaterSA.,r: 5t517 (M' or)HighVoltage: \O 5o Window: 4'41- Thrshld: z'z O
Blank Canister Bkgd. Range, cpm:
Gross Source Range, cpm:
Detectorsn'r: a7ar53J [D-z\) SourceID/SN, Rq"bf G* oS sourceActivity: s1,Z (f(;
2c: ll b to l5() 3o= lo8 to t58
2o: iooa5 to to439 3o: l(2oto b io5LZ
rechnician: > / Ar3
y/n: y : average background and source cpm falls within the control limits.
n : average background and source cpm does not fall within the control limits.
The acceptable ranges were determined from prior background and source check data.
All counts times are one minute.
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CHARCOAL CANISTER ANALYSIS SYSTEM
srrEl.ocArroN, vvh,-lt Mz;rr I.{lt(, Blo,,J:-?, r4T
cunNr, -l nJ r r a al ior, "rl l^,ran',u ,a (tI 5 A\ Co r f .
Calibration Check Log
systemm, M-oL/J)-zo calibrationDate:412," l o o
scaler sN; Sr sa 1 ( M- oz) High voltage: 1 5 o window: -4.1-t Thrshtd: z-. za
l)ctcctor S/N: O4t 5 -32.-zd Sou,cctDisN: YoJTef Gr5-o4suurecArirrvrry, 51 '1 rpC:
Blank Canister Bkgd. Range, cpm: 2 o : I lO to t"= 48 rc {\e1
Gross Source Range, cpm:2o: 1o174 to t\oz-j 3o= i(2lll to lr065
rechnician: -- / Cry-
l s7
yln: y = average background and source cpm falls within the control limits.
n = average background and source cpm does not fall within the control limits.
The acceptable ranges were determined tiom prior background and source check data.
Ail counts times are one minute
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CHARCOAL CANISTER ANALYSIS SYSTEM
srrE LocArroN, W I^ i ]-e \Ae<a i(l ['{, E i ,, J','J , t'(-\
c;rnNt, =fq+<c^^+\o*^l l^faa'tu trl ( ut 5t+) C ori -
Calibration Check Log
System:o, $t-Ozf Dt-zo
-
CalibrationDate: 4{z-O loo owoate: 1l*lo)
Scaler SAJ:St suy I vt '" z)HighVoltage: 7 5O Window: 4,42 Thrshld: L' 2-o
Blank Canister Bkgd. Range, cPm:
Gross Source Range, cpm:
Detectors,OI: o4rS 3z ( 1)- zo) SourceID/SN' U"zzcf eS-o{ SourceActivity: 51 3 KP(;
2o: llo to t5a to: ot 8 to lbl
zo: LobbQ rc tolL{ tc: tobo I to too)oiO
==.-- r/ /1
Technician:
All counts times are one minute.
y/n: y : average background and source cpm falls within the control limits'
n : average background and source cpm does not fall within the control limits.
The acceptable ranges were determined from prior background and source check data.
Prc
?ot
?ne
?6
DATE BY BKG
#r
BKG BKG
tti
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AVG
SOT]RCE
#1
SOURCE
#2
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#3
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AVG.
ok?
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qlzvloo b/L r4Q Izt t45 tb7 o743 i 01 Go)t A-72- |o-t 44 Y
tt l'tL". lo rt bL/-rzrl 1A<r Ato 137 t O-7 11 tOlzB ioQ94 iUntO Y
q lhloo Dl-z-(\5 I 2-Z-r4-f,ra5 I OG1<t01 I r t> UB)r fi /^ol I
4 lzt /oo 7>t/u tL1 t4r r?q tlG i r-'t"7t-Cz r>--7 4 -)I OC4 1a t o 1"Zi Y
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BALANCE OPERATIoN DAILY CHECK
BatanceModel:Ohttws'.)r{t'oqru""l4o)l\CSals'N'\La01
t Standard weisht (s): 'Lo 0 ' D
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1 fzt,lo o 7OO.O '2,icO,l)Y €'VA 42a,,--
llznloo z-co, o 2-oo. o /nt,->/Cor^-
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APPENDIX B
Recount Data
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