DRC-1999-001041 - 0901a06880805788

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NESIAPS RADON
White
FLIIX MEASUREMENT PROGRAM
Mesa MiIl, L999
Prepared for:
International Uraniu.m (USA) Corporation
5425 S. Highway 191
Blanding, Utah 8451-1
Prepared by:
Tellco Environmental
1231 N. 23 St., Ste. 205
Grand Junction, Colorado 8L505
October 1999
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1.0
3.0
4.0
5.0
Table of Contents
INTRODUCTION
SITE DESCRIPTION
SAMPLER DESCRfPTION
FIELD OPERATIONS
4.)- General Site Specific Information
4.2 SamPler PlacemenL
4 -3 SamPler Retrieval
4.4 siLe Exit
4.5 Environmental Conditions During Measurement Periods
I,ABORATORY OPERATIONS
5 .1 fntroducti-on
5.2 Apparatus
5.3 Analysis Procedure
5-4 Weighing and Background Countj-ng
5 .5 Receipt and Weighing of Exposed Charcoal
5.5 Gamma RaY Counting
5.7 QualitY Control SamPles
5.8 Data validation
5.9 Calculations
Paqe
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a
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72
13
)-4
4
5.0 SAMPI,E RESULTS/CAI,CUI,A.TIONS
Figure 1, Large Area Activated Charcoal Collector Diagram
APPENDICES:
A - SuPPort Documents
B - Recount Data
c - Radon Flux Sampte Laboratory Data and Field Bl-ank Data
D - MaP Pocket, Figure 5-1
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NESHAPS RADON FLUX MEASUREMEbM PROGRAM
rnternatj-onal uranium (usA) Corporati-on
White Mesa Mil1
6425 S. HwY' 191
Blandinq, Utah 84511
1.0 INTRODUCTION
Tel1co Environmental L'L'C' (Tellco) provided support to Internationaf Uranj-um
(usA) Corporation (hereinafter, IUC) regarding their required National Emissj'on
Standards for Hazardous Air Pollutants (NESI{APs) Radon Flux Measurement effort on
Tailings Cells 2 and 3 at the white Mesa Mi11 uranium processing facility in
Blanding, utah for the calendar year of 1999. These measurements are required of
IUC to show compliance with 40 code of Federal Regulations' Part 51' subpart l^I'
National Emission standards for Radon Emissions from operating Mi11 Taili-ngs' At
present, there are no subpart T uranium mi]l tailings at this site' As required
by the regulations, the NESI{APs monitorj-ng for existing mill tailings piles is a
flux standard that limits the emission of radon from piles ' The standard limits
the amount of radon that can be emitted per uni-t area (m') per unit of time (s) '
Thisstandardj.snotanaverageperfacility,butisanaverageperradonSource.
According to subsection 61.252 standard, (a) radon. 222 emissj-ons to ambient air
from an existlng uranium mi1] tailings pile shall not exceed 20 pCr/m'Z-s of radon-
222. Subsection 6L.253, Determining compJ-iance, states that: "Compliance with
the emission stand.ard in Lhis subpart shalt be determined annually through the use
of Method 115 of APPendix B.''
Tel1co was contracted to prowide radon
placement/retrieval and sample analysis of the
Thi-s report addresses the procedures empJ-oyed
secLion 6.0 of this rePort '
col-lectors, Perform the field
coflectors for caLendar year 1999 '
to obtain the resutts Presented in
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2.0 SITE DESCRIPTION
The white Mesa Mi1I j-s l-ocated south of BJ-anding, utah on Highway 191 - The m111
began operations in 1980 for the purpose of extracti-ng uranium and vanadium from
feed stocks. Processing eff]uents from the operation are deposited in four
,, lined,,cell-s, which vary in depth. Ce11s 1and 4 are used solely for "liquor"
storage, while Cel-Is 2 and 3 are used for sand taifings/liquor deposition"
ce]l 2 has a tota] area of approximately 2'70,624 square meters (m') ' This ce11
was comprised. of two source regions that required NESHAPS radon monitoring:
approximately 252,841 m2 of the cell- had a soil cover of varying thickness, with
approximately 17,?83 m2 of exposed tailings "beaches"- There was no signi-fieant
standing liquid in "1ow" elevation areas within Cel1 2'
CelI 3 has a toLal area of 288,858 m:. This celt was comprised of two source
regions that required NESHAPS radon monit.oring: approximately 85,357 m'of the
cel1 had a soil cover of varying thi-ckness , wi-th approxi-mately 40 ,396 m' of
exposed tailings ,,beaches". The remaining approximately 153,105 m' was covered by
standing liquid in "low" elevation areas'
Due to worker heal-th and safety concerns expressed by both IUC Site personnel and
Te11co moni-tori-ng staff, a smal] portj-on of the areas of the wet beaches of Cel1 2
and Ce11 3 were not sampled due to the exLreme instability of wet taili-ngs
beaches .
3. O SAMPLER DESCRIPTION
The Large Area Activated Charcoal Canj.sters (LAACC) used by Tellco personnel to
perform the required radon measurements were fabricated in conformance with "Radon
Flux Measurements on Gardinier and Royster Phosphogrypsum Pil-es near Tampa and
Mulberry, Florida" (NTIS Document #P885-a6i-874) as referenced in 40 CFR, Part 61,
Method 115, Appendj-x B. This method of performing radon flux measurements
involves the adsorption of radon on acLivated charcoal in a large-area collector'
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The charged collector is placed directly on the
and is allowed to collect radon for a gi-ven time
The radon collected on the activaLed charcoal is
spectroscoPY -
Each LAACC was constructed using a 10-inch
charcoal- distribution grid, retainer screens'
Figure 1).
materiaf surface to be measured
period (aPProximaxelY 24 hours) '
then measured bY means of gamma
diameter PvC end caP/ spacer Pads,
pads, and a steel retainer ring (see
within the cover regions of Cells 2 and 3 ' and
was developed Lo accommodate locating the
prior to deploymenL, each collector was charged with 180 grams of baked charcoal
from sealed individual sample containers (reference section 5 ' 0 bel-ow for
laboratory procedures). After the 24 hour measurement period, Lhe exposed
charcoal- was transferred to the plastic sample containers, seal-ed air-tight (with
tape), labeled as to sample identification al-ong with exposure times/dates' and
transferred to Lhe Te11co laboratory (Grand JuncLion, colorado) facility for
analysis .
4.0
4.1.
FIELD OPERATIONS
General Site Specific lnformation
Tellco personnel laid out baselj-nes
a gri-d coordinate l-ocation system
samplers in the field'
The sampling effort commenced on the morni-ng of July 12, 1999' after site-specific
health and safety training was provided by IUC Health and safety personnel earl-ier
that morning. Teflco field technicians laid out Lhe grid system on ce11 2 and
Cell3usingameasuringtape,pacing,andli.ne_of_sightmarkings.Boundary
distinctions betsween the source regions were establi-shed by visual i-nspection and
so noted on the field maps. Tetl-co personnel placed a minimum/maximum thermometer
j-n the immediate vicinity of the two cells duri-ng sampling, measuring ambient air
temperatures at the site to monj-tor compliance with the 35"F measurement
criterion.
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FIGURE 1
FIGURE 1 Large-Area Radon Collector
I -in Thick
Scrubber Pad
I /2.rn. Thick
Scrubber Pad
I /2 ,n Ihrck Charcool
Support Grid
Retarner
Spttng
l0-in, dia
PvC End Cap
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4.2 Sampler Placement
Radon measuremenEs were made in conformance with methods described in NTIS
Document #pBB5-161g74 for each 100 sample measurement set for each source region.
In addition to the 100 samples, each sample set consisted of 5? field blanks' The
spacing distributlon for each set of 100 measurements was determined by visual
means and a ,'best fit" distribution pattern for each source region" Field
personnel safety was paramount in the distribution of sampJ-ers over 'rwet beach"
regj-ons due to the l-oose, unconsolidated condj-tion of the saturaLed tailings,
which are similar in consistency Lo "quicksand' "
placement/retrievaf of collectors was accomplished using vehi-c1es where possible.
and by foot travef where vehicle travel was not feasible.
A co]lector was chosen and the retaining ring, screen and foam pad removed Lo
expose the charcoal- support grid. A pre-measured charcoal charge was selected
from a batch, opened and distributed evenly across the area of the support grid'
The collector was then re-assembled and gently placed face down on the surface to
be measured. Care was exercised not to "push" the device into the sOil surface'
The collector rim was "sealed" to the surface using a berm of local- borrow
material (either tailings or soif) to reduce dilution due to ai-r or wind currents
withi-n the collector.
A sample identification number was then assigned to the col-lector. Sample numbers
util_ized an a]-pha-numeric system composed of the charcoal, batch letter (i.e', A.
B, C .) followed by a sequential- nurnber indicating the placement (i-e.' 01,
02, . ) . This sample identification number was recorded on an adhesj-ve labe1
and placed. on the top of the collector. The sample ID, date, and time of
placement were recorded on a master data sheet for each set of measurements '
During placement of charcoa] flux collectors, five field blanks were collected-
The procedure for preparing a field blank was to charge a col-IecLor with charcoal,
and place it inside an airtight container. The blank(s) remaj-ned in the sealed
collector for the 24-hour sampJ-e time period'
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4.3 Sampl-er Retrieval
Retrieval- of the collectors followed the same pattern as placement ' The
co]lectors were disassembled and the charged charcoal removed by pouring from the
collector into a large funnel suspended above a sample charge container' The
sample ID number was transferred to the charge container, which was seal-ed and
placed in a box for transport. The date and time of retrieval were recorded on
the same data sheet as the sample placement i-nformation.
Each charged collector was retrieved upon completion of Lhe measuremenL time
period (approximately 24 hours). Upon retrieval of the collectors. the fi-eld
blanks were retrieved and the charged charcoal- returned to a conLainer, sealed,
and labeled as such, and returned for analysis along with the measuremenL set-
Samp1e data sheets accompanied the shipmenL to the laboratory. During retrieval
of LAACCs on CeIl 2 Beach region, one of the coflectors (A29) was dropped whj-Ie
the collector was being handled and the charcoal spi1led, causi-ng the sample Lo be
lost.
Te11co personnel maintained custody and assured tlmely delivery of the samples Eo
the Tellco Grand Junction laboratory for prompt analysis of the charcoal samples.
4.4 Site Exit
Tel1co field personnel and equipment were alpha scanned for possible contaminaEion
resulting from fj-eldwork activities. Al-1 eguipment and field personnel were
surveyed. and released for unrestricted use by IUC's Health and Safety personnel.
(a)
(b)
(c)
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4.5
Referencing 40 CFR, Part 51, Subpart W'
F:adon-222 Emissions, Subsectiot 2 "1'4
"the following restrictions are placed on
Appendix B, Method 115 - Monj-toring for
Restrictions to Radon Ffux Measurements'
making radon flux measuremenLs:
Measurementsshallnotbeinitiatedwithin24hoursofaraj.nfall.
Ifarainfalloccursduringthe24hoursmeasurementperiod,the
measurement is invalid if the seal around the 1ip of the collector
has washed away or if the collector is surrounded by water'
Measurements shaI1 not be performed if the ambient temperature is
below 35"P or if the ground is frozen' "
Site Specific Discussion
(a) prior Lo commencement of any sampler placement. rainfa]l amounts (if
any) were ascertained at the IUC weather station rain gauge and/or at
the raj-n gauge placed in the immediate area by Tel1co field
personnel. A rainfa]]. measuring 0.02,, occurred at the si.te during
the24-hoursamplingperiod(afterplacementoftheco].].ectors)on
the Ce]1 3 Beach region, July 13-14, 7g9g- Additional rainfafl
continued after retrieval- (ceasi-ng at about 1:00 PM on July 14, 1999)
causingadelayoftheplacementofcanistersonCell3Coverregion
until early afternoon on July 15' 1999'
(b) The aforementioned rainfall measuri-ng o.02" did not wash away any of
Lhe seals of collectors a]ready emplaced on the Ce1] 3 Beach region,
nor were any of the collecLors surrounded by water'
(c) During all- 24-rLotlt sample set placements' the minimum ambient air
temperaturerecordedbyTellcoatLhesitewas62"F,recorded
overnight JulY 16-17, 1-999'
5. O LABORATORY OPERATIONS
5.1 Introduction
Activated charcoal gas adsorption col-lectors are passive sampling devices used to
determine the flux rate of radon-222 gas from a surface area' The charcoaL
canj-ster used consists of a 1o-inch pvc cap containing a bed of 180 grams of
activated, granular charcoal- placed in a dj-stribution grid on top of a 1x inch
thick layer of foam and secured under a % inch foam layer and a galvanized steel
screen bY a retaining ri-ng'
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Sample collecLion is initiated by placing 180 grams of unexposed charcoal from a
sealed container inLo the above described canister and, after securing the
retaining ring, placing the canister (open face down) onto the surface to be
tested. Rad.on gas is adsorbed on the contained chareoal and subsequenL
radj-oactive decay of the entrai-ned radon results in t.he occurrence of radioactive
lead-214 and bismuth-2l-4 in the canister.
These radon progeny isotopes emit characteristic gamma photons, which can be
detected. The original total actlvity of the adsorbed radon can be calculated
from these gamma ray measurements using empiri-caI calibration factors derived from
cross-calibration of source standards containing a known total activity of radium-
226 in a geometry identical to the samples to be counted'
5 -2 Apparatus
o Sing1e- or multi-channel pulse height analysis system, Ludlum Model 2200 with
a Teledyne 3" x 3" NaI(Tl) detector-
o Lead shielded counting vrell approximately 40 cm deep with 5 cm thick lead
walls and a 7 cm thick base and 5 cm thick top'
e NfST traceabfe aqueous sol-ution radium-225 absorbed onLo 180 grams of
activated charcoaf calibraLion source.
o ohaus Model C501 bal-ance wi-th 0.1 gram sensitivity.
5 .3 Analvsis Procedure
Inepectsion of the Charcoal Container
Charcoal was received at the analytical laboratory in the sealed sample
containers. Upon receipt, the i-ntegrity of the container was verified by vj-sual
i-nspection of the plastic container"
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Sarp1e Identsification Numbers
Each sample container had a
determined in the fie1d, and
container.
unique sampJ-e identification number, which was
wrj-tten onto a 1abe1 attached to the sample
radon flux measurements.
and for charcoal recYcled
110'C. Drying procedures
Drying and ReeYcling
All- charcoal was dried before use in the field for
Procedures were the same for newly prepared charcoal
after field use. Charcoaf was dried at approximately
were as follows:
Oven temperature seL to 110oC-
Charcoal- placed in the oven in a metal baking tray.
o Baked for 24 hours.
o Immediately after the tray was removed, approximately 180 grams of charcoal
were transferred into clean sample contaj-ners and sealed wit.h plastic tape.
IA weighing and Background Counting
proper ba1ance operation was verifled daily by checking with a standard weighE.
The balance readout shoul-d agree wi-th the known standard weight to wi-thin + 0.1t.
If a discrepant readout was obtained, the balance was re-zeroed, the check weight
wiped with a soft, lint-free cloth, and re-wej-ghed. If the discrepancy persisted,
Lhe balance would have been removed from servj-ce and tagged "Out of Seruice." For
this project, the scale conformed for each day of use (See Appendlx A, Balance
operation Daily Check form).
After acceptable balance checkout, each empty container was individually placed on
the balance and the tare weight of the container was documented to the nearest 0.1
grams on the label-. The scale was re-zeroed with the container on the balance'
Charcoal was carefully added Lo Lhe container untiL the readout registered 180.0
grams. The 1id was immediately placed on the container and seafed wi-th plastic
tape- The tape was stretched s1-ightly while wrapping around the container. The
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end of the tape was
checked for readout
folded to form a tab for easy tape removal. The balance was
drift between each container-weighing step'
Gamma ray countlng system checkout was performed as described in Section 5'6'
Three five-minute background counts were acquired for ten containers selecLed at
random to represent each "batch. " Each sealed container was placed indj-vidual1y
in the shiel-ded counting we11, wiLh the bottom of the container centered on the
detector. Observed empty counting well background counts must fal1 withj-n the
ranges estab]ished for the aforementioned Ludl-um/Teledyne counting system with
shiefded well. The background count rate was then documented for the
representative containers, and subsequently documented on the respective "Radon
Flux Field Data Sheet'r for that batsch. If the background counts were too high to
achieve a sufficiently 1ow sensitj-vity 1evel (Lower Lewel of Detection. LLD), the
entire batch was labeled non-conforming and recycled through the drying process.
5.5 Receipt and Weighj-nq of Exposed Charcoal
containers of exposed charcoal were transported from t.he site and delivered to the
laboraLory for analysis by Tellco personnel. The Telfco laboratory staff was
responsible for weighing and inspecting the exposed canisters; inspectj-ng the
documentation forms,' and entering |he required data documentatj-on Lo database
spreadsheets.
when the containers were received, the following items were inspected:
. Container was closed and sea]ed with tape.
Container was not damaged.
Data sheet was comPlete -
Discrepancies found during this inspection were documented on the data sheet'
containers received open or damaged resulting ln seal failure were considered void
and were not analyzed. A11 sampJ.es that were transported to the Tellco laboratory
were received there in good physical condition; however, as previously mentioned'
one sample from Ce1l 2 Beach region was Lost in the field"
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After receipt inspeetions, conforming containers were weighed on a bafance to the
nearest. 0.1 gram and the gross weight was logged on the "Radon Flux Field Data
Sheet" under the appropriate column'
5.5 Gamma RaY Counti-ng
Source/Background Checks
The charcoal gamma ray counting system
when used. These checks included
measurements. (APPendix A of this
performance check records. )
One sample count
documented on the
The sample counts
was subiected to performance checks daiJ-y
background and radium-225 check source
report contains daily counting system
was accrued and the mid-sample count time and date was
f iel-d data sheet.
were documented on the field data sheet for data reducti-on.
Sample Analysis
r The length of counL time was determined by the activiLy of the sample being
analyzed. A data quality objective establj-shing a mi-nimum accruement of 1000
coultsforanygivensamplewasfollowedduringsampleanalyses.
The sample container was placed in the counting welL with the 1id side up and
the center on Lhe NaI d.etector and the shielded well door was seL into place'
c1
The above steps were repeated for each exposed sample collector'
Approximately 10t of Lhe contaj-ners counted on a given date were selected for
rltounting. These conLainers were recounted on the next day after the
orj,ginal analysis using the procedure described above'
Ouality Control Samples
charcoal- flux measurement QC samples included the following intra-laboratory
analytical objectives as required in 40 CFR, Part 61, Subpart W, Appendix B'
Method 115, 4.0 - Quality Assurance Procedures for Measuring Ra-222 Fl-ux' D':
. recounts, 10t, and
o field bLanks, 5*.
2,
2,
3,
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5.8 Data validation - Recounts/Blanks
Allsamplecanist,erdataweresubjectedtovalidationprotocols
presents the data validation results:
Forty recount measurements were performed by conducLing repli-cate analyses of
individual field samples. These recount measurements comprised approximatefy 10t
of the total number of samples analyzed. The precision of all recount measure-
ments ranged from less than 1t Lo 24* with an overall average precision of
approximately 4.3t. The precision of recount measurements that were above 1
pci/mr-s ranged from less than 1? to 9.1t with an average precision of
approximately 3.98. The aforementioned recount precision val-ues are well within
the expected variability of the analyEi-ca1 method'
Twenty field blanks were analyzed by measuring the radon progeny actj-vity in
samples subjected to all aspects of the measurement process, excepting exposure to
the source reg5-on. These blank sample measurements comprised approximately 58 of
Lhe field measurements. The results of the blank sample analyses measured radon
flux rates, which ranged from 0.00 to o'02 pci/m2-s, with an arj-thmetic average
fh:x rate of O.O1 pC1/m'?-s. This corresponds to approxi-mately O'058 of the
regulatory limit of 20 PCi/m'?-s'
lOO samples = 100t comPleteness
99 samples = 99* comPleteness
- 100 samples = 100t comPleteness
- 100 samples = 100t comPleEeness
actual QC walidation met the obiect.ive
The following
The objectiwe is 100 sampLes to
regulations. The following is
sampling program (EPA rules
objective):
be coll-ected from each region, as specified by the
the acEual completeness attained during Tellco's
and regulations specify an 85t compLeteness
Ce11
Ce11
Ce11
Ce11
Cover
Beach
Cover
Beach
As presented above,parameter requirements
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5.9 Cafculations
Radon flux rates were calcul-ated for charcoal- co1lection samples using calibration
factors derived from cross-calibration Lo sources with known total' activity with
identical geometry as the charcoal conta.iners. A yield efficiency factor was used
to calcuLate the total activity of the sampl-e charcoaf containers '
In practi-ce, radon
algorithms utilized
flux rat.es were calculated by a database computer program. The
by the data base program were as follows:
Equation 5.1:
pCi Rn-222/m'sec =ITS*A*b*0.s@/et'15))
where: N = net sample count rate, cpm under 220-662 keV peak
Ts = samPle durati-on, seconds
b = instrument calibration factor, cpm per pCi-,' values
0.1730, for M-01/o-zt ar]d
0.1595 , fot M-02/D-20
d = decay time, elapsed hours between sample mid-time
mid-time
A = area of the collector, m2
Equation 5.2:
J n.^"" samnl e . r:nm Backqround Samp-l-e ,cpm
! samplecount ,t , min Background Count , t , min
Error,2o=2^
used:
and count
x Sample Concentrat:-on
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Equat,ion 5.3 :
2.71 + (4.6s)(SJ-l'LD = [Ts*A*b*o.u"iusr':srl
where:. 2.71 =
4.65 =
Db
fr^f D -b=
A-
constant
confidence interval factor
standard deviation of the background count raLe
sample durat.ion, seconds
instrument calibrati-on factor, cpm per pCi; values used:
0.1730. for M-01/D-2L and
o -7696, f or M-02 /D-20
decay time, elapsed hours between sample mid-time and count mid-time
area of the collector, m2
6.0 SAMPLE RESULTS/CALCT'LATIONS
Referencing 40 CFR, Part 51, Subpart W, Appendix B, Method 115 - Monltoring for
Radon-222 Emissions, Subsectiorl 2.L.'7 - Calculations, "Lhe mean radon flux for
each region of the pj-le and for the total pile sha1l be calculated and reported as
follows :
(a) The individual radon ffux calculatj-ons shal1 be made as provided j-n
Appendix A EPA 86 (1) . The mean radon flux for each region of the
pile sha1l be calcul-ated by summing all individual flux measurements
for the region and dividj.ng by the total nurnber of flux measurements
for the region-
(b) The mean radon flux for the total uranium mi,ll- taj.l-ings pile sha11 be
calculated as fol-Iows:
Where: J"
Ji
Ai
A,
J,A, + JrA, [+l JiAiUs= q
= Mean flux for the total pile (pCi/m'-s)
= Mean flux measured in region i (pCi/m'?-s)
= Area of region i (m'z)
= Total area of the pile (m')
2.L,8 Reporting. The results of individual flux measuremenLs, the
approximate locati-ons on the pi1e, and the mean radon flux for each
region and the mean radon fh:x for the total stack [pile) shal1 be
inc1uded in the emission test report. Any condition or unusual event
that occurred during the measurements that could significantly affect
the resulLs should be reported' "
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Site Specific Sample ResulLs (reference Figure 5-1)
(a) Tlhe mean radon flux for each region withj-n each cell is as fol-1ows:
Ce]12-CoverArea
- Beach Areas
= a2.4 pCi,/m'z-s (based on 252,841 m2 area)
= 25.7 pC!/m2-s (based on 17,783 m2 area)
Ce]l 3 - Cover Area = 11.9 pCl/m'?-s (based on 85,357 m2 area)
- Beach Areas = 6L.9 pCi,/m'z-s (based. on 40,395 m2 area)
- Standing Liquid Areas = 0 pCl/m'?-s (based on 163,105 m2 area)
Note: Reference Appendix B of this report for entire summary for
individual measurement results and specific sample region maps "
(b) Using the data presented above, we have cafculated the total mean radon flux
for each Pile (ce11) as follows:
Ce112= 13.3pCi/m2-s
(72 .4\ Q52 ,841-) + Q5 .7\ (a7 783\
270,624
Cel1 3 = 1"2.2 pCr/m2-s
(11.9) (8s.357) + (61.9) (40'395) + (0) (153.10s)
288, 858
15
APPENDIX A
Support Documents
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BALANCE OPERATION DAILY CHECK
Ba]ance Model : o hay5 Qo--l'o- Tq'nn c7ol s'N' lz3 oJ
Standard Weight (g)' 3OO'O \t-a'ws
Date Pre-check (S) Post-clreck (S) O.K. t 0-'l% By
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tltsl 3oo- I 300.e9 )24/2.-
1{t,.[?4 3oD-o joo-o t/aS D'q-
l?"bq 300 ,\300' I '/t>>?<-
11u(a\zoo. o joo- o f'a1 >72-
1l^'r("p)3c.0- |j@-[{v5 w
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to,
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fo:l-w
?o*
lR-tctY
SITELOCATION:
CHARCOAL CANISTER ANALYSIS SYSTEM
a tl,l ,o UA Grqn,l J J . L o
Va-ioq1
y\-ol D-"-l calibranoncheckLog
syst m D' L,rf, zzoo/t-^J 4-zocalibrationout.' 5/ ?J:1-5/r" 1o oDue Date:
4-42-ScaturSN: +t alZ- Ctt-'f) HighVolrage: tDSO Window:Thrshld: 2- -z D
ro to515
SOURCE
#2
Dctcctor SN: o 4 t s T (D' z- l) ,o*., iD/sN: P-^'-'/qt:o source Activiry:
(rto>> ':ct q t-t r-
fl{-,.*w*Blcgd.Rargc,cpm:2o= 44qb ro 94f0) 3o= q$ts|
BtetL Gxiskr
€rese-Scuree Range, cpm:
w 1-t-
P"e
Zo= i\l to t5( _lo= lO I ,otbf
sq'3 ?
All counts times arc one minute.
rcchnician: T G^f--
SOURCEtl
yin: y = average backgrorurd and sourcc cpm falls within the contrgl lirnis.
n = averagc background and source cpm does not fall withrn rhe control limrs.
Thc acccptablc rargcs wcre dctermined from prior background and source check data.
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CHARCOAL CANISTER ANALYSIS SYSTEM
/';- ll r
SITE LOCATION:l"lt* L"rb- C,---o.,^) lr$ cD
CLIENT:V ou*i o W5
/\-O\ Q-af CalibrationChecklo8
L,\LlLoo f ul.A 44-zrcalibrarionDate: ;lo (O\Due Date:
4-425, t51 ] Cna-o D Highvoltage: to 5D window:Ttnshld: -L-2o
Systcm ID:
Scalcr SN:
Bla* Csnistcr Bkgd. Range, cpm:
Gross Source Rangc, cpm:
DetccrorSN: o +t53a f u-=\ ro-r.1D/SN: k^ou /ns-o5 Source Activiry, 5q-> 3f (;
ro lrl 3o= lol to lt"l
zo= lo'?-Vo to to11{ 36= loto4 o ioBbl
rechnician: Pt- a**
2a= lll
Q"tu? ott
pf(
,0J.'\J-
QF{-wl
?t'v-
lolr
yln: y = avcrage back;round and source cpm falls within the conrol limis.
n = avcragc background and source cpm does not fall within the conUol limits.
Tbc acccpUblc langcs werc detcrmined from prior background and source cbeck data.
All counts timcs are onc mrnute.
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lnt?}(bt'Prt-
P"{
P,Y
SITE LOCATIoN: [ -C
C}IA, JOAL CANISTER ANALYSIS SYSTEM
ll.o L-rtb- *.qnl J"+, Co
CLIENT: Va-la ta- I
M-OL D - 2-o Calibratron Check I og
L^J z2 oo / t,il44-2-a calibrarion Date: Sl r" { q \Due Date: 5lo lo o
SVStem D: L-A4 z . v\/ / L r^ c: q4+ c !
ScalerSN: StSr" ) Lrq-oz\ Highvolrage: f So window:4-+Z- Thrshld: Z-z o
DerecrorSN: o 4t53zLv'zo1 SourcctD/rN: ?^*b/e-Eo+ Source Activiry:
gq to tz1 3o=Blant Canistcr Bkgd. Rangc, cpm:. 2 o =
Gross Sourcc Raoge, cpm: 2 o =
tz- I 3o= 1q ro t31
1oo 30 ro to\o I c 3 o= otBBS , lo15{
f,mw
{'n-
rcchnician: -22-- *V-
All counts times arc onc minute.
B}.G
A\'G
y.tr: y -- avcragc background and source cpm falls within the conrol limits.
n = avcrage backgrouud and source cpm does not fall withrn the control limls.
The acccptablc ralges were determined from prior background and source check data'
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CTIA, -UAL CANISTER ANALYSIS SYSTEM
srrElocArroN, -T< l.[c., L--,,b - G', qll -\ ;t, C o
CLIENT: \J Av-\ov5
Systcm ID:
i^-o 2- D-zo
L,a I zzoo f tq) 44-z o
Calibranon Cl,cck I og
calibratioaDarc: 5l b lqol Due Date:slbtco
^-ro-7>5
Blanl Csnistcr Bkgd. Rangc, cpm:
Gross Sorircc Rangc, cpm:
2o= 3q
0,t
Qr:i-
?.c
?n'+
?,r<
lc:\-l[
kq
P^eFr
Ut'L
{drY
scalcrsN: tt5u3 (U-oz)High Voltage: 15o Window: 4'41 Thrshld: z'20
Detccror5711: c2 4l53 z (D'-o) SourcctD/ti.t: ko'-'/GS-oS Source AcrtviV: 5\') V f (i
hi l'z-7 3o=1q to lb'7
zo= lOtbl -t" 1O671 36= ioo41 ,.1,""*I'-)Z@
B}-G
A\,\]
Loq
yln: y = avcrage background and source cpm falls within the conrol lrmits.
o = avcragc background and source cpm does not fall wrthm the control linuu.
Thc acccpublc ranS,es wcrc dctcrmined from prior backgrouud aod source check dlta.
All couns timcs arc one minutc.
o 47-11_to?e b
toqTo I ro4
APPENDIX B
Recount Data
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