appendix a survey instrumentation qa/qc › docs › ml0619 › ml061990535.pdfappendix a-i-1 ludlum...

APPENDIX A

SURVEY INSTRUMENTATION QA/QC

APPENDIX A-1

SURVEY UNIT KAISER-FSSB-010

C

Appendix A-i, Table A-1-1Final Status Survey Instrument Summary

Survey Unit Kalser-FSSB-010Thorium Remedlation Project

Tulsa, Oklahoma FacilityKaiser Aluminum & Chemical Corporation

C

In-Service PeriodInstrument Model and Instrument Seflal Detector Serial Survey Unit Kaiser-Detector Model/Type Number Number Calibration Period FSSB-010 UsageLudlum 2221 Scaler/ Field analysis, high-energy gamma detection -

Rate Meter with 44-10 Instrument was used to evaluate remediation2" X 2" Nal Scintillation progress and scan land areas for the Final Status

Gamma Detector 216521 PR226935 5/17/05 to 5/17/06 12/09/05 - 12/19/05 Survey.

S:\P4000\PA4072\FSS Reports\Appendix A\Volume VAFSSB-O10\Table A-1-1 I

APPENDIX A-i-1

Ludlum Model 2221 Scaler/Rate MeterWith Model 44-10 2-inch x 2-inch NaI Scintillation Gamma Detector

Serial Nos. 216521 (meter) and PR226935 (detector)

(

Form HPMIM-2-6-1Daily Check Log for Ludium Model 2221 with 44-10 Detector

Instrument 7

C

Instrument Model: 2221

Instrument S/N: 216521

Detector Model: 44-10

Detector S/N: PR226935

Source S/N: Cs-137 sn: 547

Source DPM: N/A

Radiation Detected: gammaAcceptable Range:

(Refer to Penn E&RIHPMM-2-1.1)287,854 + 2a 11293,373 + 3a I

Calibration Due: 5/17/06 CONTACT 265,777- 2a 11260,259 - 3a I

1

2

4

5

6

Background Source Net Source Batt check-Date Count Rate Count Rate Count Rate Technician W/IN +I- 2a (volts) WIIN +/- 3a

7:30 1219/2005 9,417 286,437 277,020 DW YES 5.6 YES

7:20 12/12/2005 9,084 282,927 273,843 DD YES 5.5 YES

7:25 12/13/2005 9,275 296,331 287,056 DD I YES 5.5 YES

6:30 12/15/2005 9,214 298,780 289,566 DD I NO 5.5 YES

7:25 12/16/2005 9,264 297,376 288,112 DD NO I 5.5 YES

7:20 12119/2005 9,368 299,279 289,911 DD YES 5.5 YES

I

Comments: Background 5 minute count Source check 1 minute count.

S:\P4000\PA4072\FSS Reports\Appendix A\Volume V\FSSB-010\FSSB-010 Daily Check Log

C: C

Form HPM/M-2-6-1Daily Check Log for Ludlum Model 2221 with 44-10 Detector

Instrument 7

C




Detector SIN: PR226935

Source S/N: Cs-1 37 sn: 547

Source DPM: N/A

Radiation Detected:

Acceptable Range:(Refer to Penn E&RHPMUM-2-1.1)

gammaII 7,

9,943 + 2a 10,202 + 3aII ii

Calibration Due: 5/17/06 6 INCHES 8,908 - 2a 8,648 - 3a

1

2

3

4

5

6

J Background Source TNet Source Batt check

Tim Date Count Rate Count Rate ICount Ratel Technician W/IN +/- 2a (volts) W/IN +/- 3a

7:30 12/9/2005 9,417 18,713 9,296 DW YES 5.6 YES

7:20 12/12/2005 9,084 18,727 9,643 DD YES 5.5 YES

7:25 12/13/2005 9,275 18,723 9,448 DD YES 5.5 YES

6:30 12/15/2005 9,214 18,723 9,509 DD YES 5.5 YES7:25 12/16/2005 9,264 J 18,739 9,475 DD YES 5.5 YES

7:20 12/19/2005 9,368 18,672 9,304 DD YES 5.5 YES

Comments: Background 5 minute count. Source check I minute count.

S:\P4000\PA4072\FSS Reports\Appendix A\Volume VAFSSB-010\FSSB-010 Daily Check Log

Desigm~ and MorfoclixerSientife~O-f-/ LUDLUM MEASUREMENTS, INC.

Sdnfi anST OFFICE BOX 810 PH. 325-235-5494I•ra•,•nts CERTIFICATE OF CALIBRATION 501 OAKSTREET ' FAX NO.325-235-4672

SWEE1WATER, TEXAS 79556, U.S.A."OMER WAYPOINT TECHNOLOGY GROUP ORDER NO. L235778

Ludrum Measurements. Inc. Model 2221 Serial No. ,// ,2/

,,,fg. Ludlum Measurements. Inc, Model 44-.10 Serial No._ ..

Cal. Dote 17-Moy-05 Cal Due Date 17-May-06 Cal. Interval 1 year Meteroce . 202-159

neck mark 9opp(es to Cvpplcable instr. and/or detector lAW mfg. spec. 1. 71 - OF RH 42 - Alt 701.8 mm Hg

.; NewInsturuent instrument Received r'Within Tole. +-10% ] 10-20% Q] OutorTol. .ReqW.rigRepair Other-See comments

" Mechanical ck. - . Meter Zeroed • Background Subttact " "-p"t Sens. Linearity' F/S Resp. ck 1• Reset ck. f Window Operation .[I Ge)troplSm

_" Audio ck. E] Alarm Setting ck. [ Batt. ck. (Mn. Volt) 4 A.VDC

Calibrated In accordance with LMi SOP 14.8 rev 12/05/89. [ Calibr~ted In accordance with LMI SOP 14.9 rv 102/07/97.ITI~eov91 mvstrumenf Volt Set Comments V Input Sens. Comment mV Det. Oper. Commen ts V oa 4rA&6~V o Ra =tio_

[f IV Readout (2 points) Ref./Inst. 500 ., I ...... V Ref./Inst. L00"'I L.-

:OMMENTS:

High. Voltage:Threshold dial:

Window dial:Window Position:

.esolution for Cs137:

Peak settings625v64240

"IN"S,9.1%

Gross Counts950100 (10mv)•n/a"OUT"n/a

Model 2221 currently set ýor peaking.

High voltage-set with det ýctor connected.

Firmw6re:261072

~'a .........& .E~..A ... A..J..,L~ ., ...- M &,U AlA I., .M-4. ~ 1mf si AId.D I~w~ eniv,,r r~~oREFEENCE UNMUMN REC'D-- - "L,#hhd msRANGE/MULTIPUER

X1KX1KX 100X 100x10

_xI0_XI

XI

-REFERENCE "CAL POINT

Armrnlr •l00kcpm

10kc=m4kcpmI kcpm

400cpm10acorn

AINSFOUM5NTDRECAIG•AS. FOUND REAING'INStROJMENTMETER, READING**4/!

_ Ib/,'

Vam

"1'1.

. nkceohaYMi*± 10% C.F.vAiW**2% ALL Rango(s)$ Calibraled EIeclronICaUYREFERENCE INSTRUMENT INSTRUMENT REFERENCE INSTRUMENT !I INSTRUMENTCAL POINT RECEIVED METER READING* CAL POINT RECEIVED A: METER READING"

)adout 400kcpm llmelc4Lm . _________ -4 4OAm _0cn a'4kp E CPm _ _

4kcpom (/ 9 . kcporn .k

*4Q0.cm 5 l _ __ _

-0p lop. -5- .. J c =~..+~l~4vcIobca~fcteSs~~~wn booIm~l -i.crm~tcst toeISMfel en c0Drmed Dyploroo WoOM lo Kw NWY -A- d S--J -4Td* ~ 4 o o CON60 1.OOW W&Wxo soro tackirds Orooo mofltOfbw or hose bee dwived from cooeped vdo o(nakud OCOd oonsfcrits orttose beon dortyed by #w C2*~Io " (cdAoftoiof mctV*viO5.

I c otions iom ontrm s~o t~o m.LnOrwf of N t4CZ4-21-1994 and NO t23-1978 State O(jeyos OaCIoioUn Likcz No. LO-A963'oference Inslruments and/or Sources:

S ;arnrnaS/N 0 1162 5G1 12 OMW 06 10 DOTIo O D~o 0T879 0 E552 5 E551 [3720 01734 E01616 2Neutron Arn-241 Be SINT-304

.)ha SIN 5 Beta SIN _j Other :.Am241-1.66uC1

mS00 S/N 38120 - Oscilloscope S/rt ( MultimeterSIN 1 78401030

,alibrated By: A L kf~ Date 7iy-, -

Reviewed By. 02 Datei1a .~M O

Bench Test Data For

Detector 44-10 Serial No. "_ •'P€f3

Customer WAYPOINT TECHNOLOGY GROUP

.inter 2221 Serial No. .216 5-Z7Count Tlime ____ 0___z_ _ _ _ _

Other

Defector

i

Order#. _ 235778

Counter Input Sensitivity , ._" mV

Distance Source to Detector _ I ?,n

High'Voltage

Isotope Isotope Isotope_ IsSize Size Size_ _

tOpe_SizeBackground

f~o . 510 It(Mf

i .#o• // 637_11637

ff

~~ t'ba /1/P f8____7_

.u(I--~ AIL. /f1___"___

- fI

__ _ _ _ _ _ _-__ __ _ _ _ _ 1*_ _ _ _ _ _ _ _

_ _.. .. _ _ _i _ _ _

___________ __________________ __________________ * ______,____

SignatureDDate _?•. ,-I r

>.

V-I

04109=2003

APPENDIX A-2


C

Appendix A-2, Table A-2-1Final Status Survey Instrument Summary

Survey Unit Kalser-FSSB-01 IThorium Remediatlon Project


C

In-Service PeriodInstrument Model and Instrument Serial Detector Serial Survey Unit Kaiser-Detector Model/Type Number Number Calibration Period FSSB-011 UsageLudlum 2221 Scaler/ Field analysis, high-energy gamma detection -


Gamma Detector 216521 PR226935 5/17/05 to 5/17/06 2/2/06 to 2/17/06 Survey.

S:\P4000\PA4072\FSS Reports\Appendix A\Volume V\FSSB-01 1\Table A-2-1 I

APPENDIX A-2-1

Ludlum Model 2221 Scaler/Rate MeterWith Model 44-10 2-inch x 2-inch Nal Scintillation Gamma Detector


C

Form HPMIM-2-6-1Daily Check Log for Ludlum Model 2221 with 44-10 Detector

Instrument 7

C





Source SIN: Cs-137 sn: 547

Source DPM: j N/A

Radiation Detected: gamma

Acceptable Range:(Refer to Penn E&RMHPiM.2-1.1)

287,854 + 2a 11293,373 + 3a JCalibration Due: 5117/06 CONTACT 265,777 - 2a 1260,259 - 3a

1

2

3

4

5

265,777 o-r2a II 260,259 -c 3c[Background Source ~Net SourceI Batt checkDate Count Rate Count Rate Count Rate Technician W/IN +/- 2a (volts) WIIN +I- 3a

7:35 2/2/2006 9,494 292,637 283,143 DD YES 5.4 I YES

7:35 2/4/2006 9,312 296,304 286,992 DD YES 5.4 YES

7:40 F2/8/2006 9,425 296,531 287,106 DD YES 5.3 -YES

7:30 2/14/2006 9,334 j 294,644 285,310 DD j YES 5.3 JYES6:50 2/17/2006 9,207 I 295,588 J 286,381 DD YES 6.1 1 YES

Comments: Background 5 minute count. Source check 1 minute count.

S:\P4000\PA4072\FSS Reports\Appendix A\Volume \AFSSB-O 1XFSSB-01 I Daily Check Log

C C


Instrument 7

(






Source DPM: N/A


6 INCHES

Acceptable Range:(Refer to Penn E&RIHPMv2.1-1)

9,943 + 2a 1110,202 + 3a1?

Calibration Due: 5/17106 8,908 - 2a 11 8,648 - 3c

1

2

34

Calibration Due:_ 5117106

I I Background f Source Net Source Batt check 1Date Count Rate Count Rate jCount Ratel Technician WIN +/- 2a (volts) WIN +/- 3a

7:35 2/2/2006 9,494 18,762 9,268 DD YES 5.4 YES

7:35 2/412006 9,312 18,716 9,404 DD YES 5.4 YES

7:40 2/8/2006 9,425 19,019 I 9,594 DD I YES 5.3 YES7:30 2114/2006 9,334 18,751 9,417 DD YES 5.3 YES

6:50 2/17/2006 9,207 18,789 9,582 DD YES 6.1 YES



Desnoer and Maracturerof

Sciantitfc and ndutitdaIIfIsl ntruents

""OMER WAYPOINT TECHNOLOGY GR.I Ludium Measurements. Inc.

CERTIFICATE OF CALIBRATION

OUP

I-.UDLUM MEASUREMENTS, INC.P)ST OFFICE BOX 81.0 PH. 325-235-549401 OAK STREET 1 FAX NO. 325-235-4672"WEE1WATER. TEXAS. 79556. U.S.A.

ORDE NOJ235778

Serial No. 4 • 2/Model

tudium Measurements. Inc. Model 44-10 Serial No..,& 2Z(4 9ISCal. Date 17-Ma-OS Cal Due Date 17-May_,-06 Cal. in-terva I Year Meterface 202-159

neck mark jgapplies to applicable imstr. and/or detector IAW mfg. spec, . 71 . OF RH 42 W Alt 701.8 mml Hg- New Instrunnet In trument Recelved 0 Within Toler. +-10% 10-20% 0 Out of Tol. 0 Requ ring Repair jOther-Seecomments

3' Mecharncclck-'-"" "[ MeterZeroed •- BackgroundSebtact - [ Inpit Sens. Lnearlty" F/S Resp. ck [• Reset ck. J Wndow Operation . ,I Ge tropismSAUdio ck. 0 Alarm Setting ck. I• Batt. ck. (Min. Volt) 4.4AVDCCalibrated In accordance with ILM SOP 14.8 rev 12/05/89. 0 Carlbroted In accordance with LMI SOP 14.9 riv 02/07197.Wehe )ld ýnV

ýfrumant Volt Set Comments V "nut ,ns. -.ment mV Det. Oper. Comments V at &f-,dfrnV DiiRatio =

[Wf I'Readout (2 points) Ref.WInst. 500 L .f'...V Ref./Inst. 2000 , /9•Lr/ V

'OMMENTS:

High. Voltage:,Threshold dial:




•IN"W~9.1

Gross Counts950100 (10mv).n/a"OUT"n/a

Model 2221 currently set ror peaking.

High voltage-set with detector connected.

Firmware:261072

LCJ -AlS A J4- 1.A. f..S W A '' W ~* ~PW~PWr

RANGE/MULIPUERXIKX1Kx 100x100X10X10xIx I

REFERENCE"CAL POINT

Afllrcnm

INSjRUM5NT'RE'D'AS FOUND READING*

1.00c-nm40kcpMlIkCPM4kcpm1 kcpm

400comlO0CPM

INSTRUMENTMETER READING*

AI

"Jnerdolnty vlt•yv M*I0% Ci:F.wfthn *20% A ALL Range(s)j Calibrated Electro•aldcaY

REFERENCE INSTRUMENT INSTRUMENT REFERENCE INSTRUMENT!! INSTRUMENTCAL POINT RECEIVED METER READING' CAL POINT RECEIVED : METER READING'

bitaiI ... Logabdout Mkciarn 2tllow Ie-0 Scale 6 Jf . /ff• _

4Akcpcn- 4/ Yocpm _ _ _

p . pm Ito403cpm . •. 0corn: •"

2urMoafom9WVI. ky-e. l CoIUo otaft COom hsft&Vh0efhS beenoCdbrtxotbystaxdktds frocedija tot*i Noflonc Iistltie o ndtOcrd ocidTedroloW. o tot*3 1 CXoUfifalo kxfos ofof Ionjef~ioaStondaX~Crds 0olcn~merbe nw ce rhave boom WNW'e from aoce~ied vd= of rdur Owdgt od constcuior Cthov boon dewhod b~y #*1 W4I0 1YP0 Of(C06txdOlm W~1*L0111icCkb(0130C3 "ern~f cofl(tomi s 01h0 w04*emw*l of A$3S3NCSL Z540-1-1994 and ANSI N23-1978 State of Texas Oatnratlon Wense-ý No. LO-1 963

•eforence Inslrumeons and/or Sources:Z arrnhaSi 01162 0G112 0565 06105 OT1006 0T87 0ES52 DE551 0720 0734 01616

.h 91a SIN17 Beta SIN [a___________ I~other-

",I

Neutron Am-241 Be SIN T-304:jAm241 -1.,66nCI

1•- rm 500 SIN. 38120 0] OsclfloscopeS/(N [_ WMultimeterS/N 78401030

A_!2_ Date A1Jau. -" -ýalibrated By: __ tun& A&O-<

ýovlewed BY.

Bench Test Data For

Detector 44-10 Serial No.- 7ZhP?".r


.inter 2221 Serial No. ;916,-71/

Dtcor Detector -

tI

Order#•. 235778

Counter Input Sensitivty •! •• .MV

Ditance Source to Detector 2 CMCount Time (3" (A~d

Other

HighVoltage

Isotope p IsotopeSize , Size

Isotope Is MopeSize SizeBackground

_ o o i z,, _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.•/ti - .• 5 I_63 7__ .

i•,•o •~~: 3 0 ! .

-I

____ ___ ____ ___I

Signature

4

Date 17--,I-4A'I7

- °4fr2W3

APPENDIX A-3


C


Survey Unit Kalser-FSSB-012Thorium Remedlatlon Project


C



Gamma Detector 216521 PR226935 5117(05 to 5/17(06 2/15106 - 3/03106 Survey.

S:\P4000\PA4072\FSS Reports\Appendix A\Volume V\FSSB-012\Table A-3-1 I

APPENDIX A-3-1

Ludlum Model 2221 Scaler/Rate MeterWith Model 44-10 2-inch x 2-inch NaI Scintillation Gamma Detector


C


Instrument 7

C






Source DPM: N/A

Radiation Detected: camma4. dl.

Acceptable Range:(Refer to Penn E&R/HPMIM-2.1.1)

287.854 + 2adl.

293,373 + 3(1U260.259 - 3a rCalibration Due: 5/17/06 CONTACT 265,777 - 2a

1

2

34

5

6

7

. . ...... Due: 1 6 259 -__ _--- r 11

[ I Background Source Net Source j Batt checke Date Count Rate Count Rate Count Rate Technician W/IN +1- 2a (volts) MWIN +/- 3a7:15 2/15/2006 9,386 286,107 276,721 DD YES 6.2 YES

8 2/20/2006 9,343 293,865 284,522 DW YES 6.1 YES

7 2/22/2006 9,261 296,665 287404 DD YES 6 YES7:25 2/24/2006 9,246 297,066 287,820 DD YES 6 YES

7:30 2/27/2006 9,248 295,283 286,035 DD YES 6 YES

7:35 3/1/2006 9,442 296,780I 287,33 8 I DD YES 5.9 YES

7:25 3/3/2006 I 9,412 293,792 284,380 DD YES 5.9 YESComments: Background 5 minute count Source check I minute count.


(:


Instrument 7

C


Instrument SIN: 216521



Source SIN: Cs-1 37 sn: 547

Source DPM: N/A


Acceptable Range:(Refer to Penn E&RHPM/M-2.1.1)

9,943 + 2a 10,202 + 3a

Calibration Due: 5/17106 6 INCHES 8,908 - 2a 8,648 - 3a

1

2

3

4

5

6

Background jSource INet Source Batt checkTime Date Count Rate Count Rate ICount Ratej Technician W/IN +/- 2a (volts) WIN +1- 3a

7:15 [ 2/15/2006 9,386 18,773 1__ 9,387 DD __YES I_6.2 I YES

8:20 12120/2006 9,343 18,889 9,596 DW YES 6.1 YES

7:30 2 22/2006 9 9,261 18,449 9188 Do YES 6 I YES

7:25 12124/2006 9,246 ( 18,915 9,669 DD I YES 6 I YES

7:30 2/27/2006 9,248 18,679 9,431 DDo YES 6 I YES=

7:35 3/1/2006 I 9,442 18,821 0,379 DD j YES 5.9 YES

7:25 3/3/2006 9,412 18,761 9,349 DD I YES 5 s.9 J YES


ff ý Designer and Manuifactrer el -Z/1 ' LUDLUM MEASUREMENTS, INC.• an I Srd C T CTO AOSB OFFICE BOX 810 PH. 325-235-5494lmtumnets CERTIFICATE OF CA LIBRA TION 1:OK~E[ ; AXN.352547

01OKSTREET FAX NO. 325-235-4672SWEETWATER, TEXAS 79556. U.S.A.

~~~~~OMER ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ RE ___________________________________________ 235778"-ot.Er WAYPOINT TECHNOLOGY GROUP orDERN.o. _____7 _

-) ludlum Measurements. Inc. Model 2221 Serial No. 2// •2/,14 f. Ludlum Measurements. Inc. Model 44-10 Serial No. j•6$"

Cal. Date 17-May-05 Cal Due Date 17-Moy.-6 Cal. Interval_ 1XYef Meterface 202-159

neck rnork •appWes to pplicable instr. and/or detector VAW mfg. spec. T. 7Z . "F RH_ Z 42. Alt 701.8 mm Hg

• New Instm-nent Instrument Received Within Toler. 4-10% []10-20% Out of Tol. []R eqddng Repo. UOther-See comments" Mechonicalck."- "P Meter Zeroed • - Background Subtract . -Inpbt Sens. Unearity

•' F/S Resp. ck ff Reset ck. f Window Operation . ' GejtroplsmAudo ck. [] Alarm Setting ck. I' Batt. ck. (Min. Volt) 4.4 VDC 1

j Callb(taed In accordance with LMI SOP 14.8 rev 12/05189..- Calobrtfed In accordance with LMI SOP 14.9 r6 02/07/97.

sdtimenlt Volt Set QComents V Input Serm, Qgommfnt mV Dot. Oper. Comments V at _4M'!Aad V Dial Retio =

{ VReadout (2 points) Ref./lWst. 5W0 Lff' ±. V Ref./lnst. 2D00" . L I/ V

;OMMENTS:Model 2221 currently set

I

High. Voltage:Threshold dial:

Window dial:'Window Position:



40"IN"K9.l %

Gross Counts950100 (10mv).n/a"OUT"n/a

Eor peaking.

High voltage-set with detector connected.I

Firmware:261072 I

r K~l1IAR~J ~I~I~W.P4F~ 5J WA~ t~9 *~ ~ ~ ~* ~ -

RANGE/MULTIPUERXIKX1Kx 100X 100X10X13xI

• L,,4x 31

-REFERENCE"CAL POINT

Arrflfnm

10kcpm

4kcpmalkcpm

400cpmlODQPr

'INS.RUMENT'RC'tiAS. FOUND READING

INSIRJMENT'" METER READING*

--. *4•S

ALL Range(s): Calibrated Electronically* -Jrw

REFERENCE INSTRUMENT INSTRUMENT REFERENCE INSTRUMENT -1 INSTRUMENT*CAL POINT RECEIVED METER READING* CAL. POINT RECEIVED :i METER READING*:Log

________ X&p m1110 ie 60kcriL.4Okcom• -'-• . ""'I

4kcpm _ -47-40corn Wp_, 50cPm !

• Mi ,of% , - ,WWW W above hstwknom boon .dbtod bystaidrds ko.cabie So No•oncr hkie c(an,•-nd$c, ý,,Caid Te ic. Ct 10 t a.•Iol •c kon fafUes cCi W-rMtw;a sow- Orgard a•nmoc1• too•- C boon doom1d frn-199 a ed A uN s 0o(fr1c97 owd .cofta ort0 bown dO bV I,ccboax~ Yoei c~orffO t to11 roC#t~orifftS of NC5L750-1-1994 and ANSI 10345978 State otiexoS Cabotio(1 Lk~erm No.10-1963•oference Instruments and/or Sources:

;onm rS/N 0 1162 0-G!12 0 M565 0 5108 OT100a6 0rT879 0-E552 0"E551 0-720 -1734 01616 •Neuoron M-241BeSINT--4.Ala SIN __ Beta SIN___ Other.:Am241-I-66v-I

[; rm 50 SIN 38120 El Osclloscope S/RI Multimeter SIN i13

,aoibrated By:

reviewed By.

---- & 4G ý X-ft3-4 C f--

Date _'7_._ -

Date l1r~J- - - - . I

Bench Test Data For Detector<.

t

t|Detector 44-10 Serial No. "? zhl.%


inter 2221 Serial No. 9Z/652/

Order f. - 235778

Counter Input Sensitivity 3 mV

Distance Source to Detector I C_ A.__"Count Time IP zlmf --

Other

HighVoltage

Isotope A IsotopeSize V/ _,"Z Size

ISizBackgroundIsotope

Size)tope,_____

Size_____MV.1

1/637_

i~-i

"_ _Woe

___________ *~~1 __ _ _ _ _ _ _ _

________________ __________________________ __________________________ __________________________ -_ _ _ __ _ __ _ __ _ _ _ _ _

Signature

D

Date

04109r=

APPENDIX A-4


C

Appendix A4, TableA-4-1Final Status Survey Instrument Summary

Survey Unit Kaiser-FSSB-013Thorium Remediatlon Project


(



Gamma Detector 216521 PR226935 5/17/05 to 5/17/06 3/16/06 - 4/03/06 Survey.

S:IP4000XPA4072XFSS ReportsXAppendix A\Volume WASSB-0147Table A-4-1 1

APPENDIX A-4-1



C


Instrument 7

C






Source DPM: N/A ]Radiation Detected: aamma

'I

Acceptable Range:(Refer to Penn E&RMPWM-2-1-i )

287,854 + 2a 11293,373 + 3o"C~Iihrntion Du~ 5/1 7/0R CONTACT 265.777- 2•

1

2

3

4

5

6

Cairto u:51/6 CONTACT 265,777 - 2a 1260.259 - 3cr I11"• Background Source Net Source Batt check

Time Date Count Rate Count Rate Count Rate Technician W/IN +1- 2a 7 (volts) I W/IN +1- 3a

7:45 3/16/2006 9,263 292,485 283,222 DD YES 5.8 YES

7:40 3122/2006 9,289 293,950 284,661 DW YES 5.7 YES

7:30 3/25/2006 9,265 296,098 286,833 DD YES 5.7 YES

7:45 312812006 9,467 294,150 284,683 j DD YES 5.7 YES

6:45 3/31/2006 9,294 290,932 281,638 DD YES 5.7 YES

6:45 4/312006 9,258 294,703 285,445 DD YES 5.7 YES


S:P40OO\PA4072\FSS Reports•Appendix AVolume \AFSSB-013\FSSB-013 Daily Check Log

C: (


Instrument 7

C


Instrument SIN: 216521




Source DPM: I N/A


6 INCHESAcceptable Range:

(Refer to Penn E&RHPM-.2-1-1)

9,943 + 2a 1I10,202 +3o11 11 -

Calibration Due: 5/17/06 8,908 - 2a I1 8,648 - 3a

Ir

E

. . .. . . . . . .. . . ... . .. . ,, -.. . . . . . .. _ _ _ "l

IBackground Source Net Source 1TBatt checkTIm Date Count Rate Count Rate I Count Ratel Technician WIN +/- 2a (volts) WIN +I- 3a

7:45 3116/2006 r. 9,263 j 18,888 9,625 DD I YES 5.8 YES

7:40 3/22/2006 9,289 18,677 9,388 DW YES 5.7 YES

7:30 F325/2006 9,265 18,994 9,729 DD I YES 5.7 YES

7:45 3/28/2006 9,467 18,589 9,122 DD YES 5.7 YES

6:45 3/31/2006 9,294 18,709 9,415 [ DD I YES 5.7 YES

6:45 4/3/2006 9,258 19,050 I 9,792 I DD I YES 5.7 YES



Designer ornd M1ornifactre, EETIC•ScOr f LUDLUM MEASUREMENTS, INC.Scientific and kirkistdal (OST OFFICE BOX 810 PH. 325-235-5494

instrnents CERTIFICATE OF CALIBRATION 0 OAK STIRET r FAX NO.325-235-4672SWEETWATER, TEXA§: 79556. U.S.A.

""OMER WAYPOINT TECHNOLOGY GROUP ORDER NO._ 235778

•) Ludom Measurements, Inc. Model 2221 Serial No._ _ _ _ _ _ _rg. Ludurn Meosurements, Inc. Model 44-10 Serial No. 2. 5@5

Cal. Date 17-May-05 Cal Due Date 17-May-06 Cal. Interval 1 Year Meterfoce 202-159

neck mark [•applIes to applicable instr. and/or detector lAW mfg. spec. T. 71 • OF RH Q2. W Alt 701.8 mm Hg

;;Newinstrurenet Instrument Received [1WithlnToler.+-I0% []10-20% QOutol¶ToL. QReq~irgRepck DOlther-See comments" Mechanicac ck. " MeterZeroed • Background Subttact "' : InptA Sens. LinearitY

J F/S Resp. ck [• Reset ck. f• Window Operation . Getroplr" Audio ck. 0 Alarm Setting ck. g[ Batt. ck. (Miin. Vol) _ 4.A VDC '

j1 Calibrated In accordonce with LMI SOP 14.8 rev 12/05/89. 0 Colibrmted In accordance with LMI SOP 14.9 rhv 0207/97.

strunent Volt Set CoCTmments V Inputseris. Cifoelt mV Det. Oper. Comments V at _c4mV DRioa__=

Wf HV Readout (2 points) Ref./W-t. WD d..f". .: V Ref./hnst. 200" / 9i V

:,OMMENTS"

High. Voltage:Threshold dial:.




40"IN"'9.l1%

Gross Counts'950100 (l0myv).n/a$OUT"

n/a

Model 2221 currently set ror peaking.

High voltageset with detector connected.

Firmw&re:261072 I!*1

L.- 2 0 If J a L. A&.& b- L-1 Id I- -r W wazqt ~ ~ ~ ~ I Wi so"n uEMz~p~.ua ~9 n .- 0

RANGE/MULTIPLERX 1K

_X1KX 100X 100XlOX10X)X11

REFERENCE'CAL POINT

ArYle'nm100kcpm40kc1m1 l0kcom4kcpmI kcpm

400DomlOOcBM

"INS.RUMIJNTREC'bAAS FOUND READING

"INS'IMENT" METER READING'

MAOA .c5

- -!

All Rranaa(S1. Caflbraled Eleclronlcalty, *Uceddoy 'Mhtn.* 10% C cu*t• - -0 - ......

REFERENCE INSTRUMENT INSTRUMENT REFERENCE INSTRUMENT !l INSTRUMENTCAL POINT RECEIVED METER READING* CAL POINT RECEIVED METER READING"

)bdout 4~~2mwixa Scale 500kcp

4Q= _1A49Af;- I~ .4kcpm:-n ._ kQlM_ .. "'

lXn MoosIIOwft k-r cef1U~tlt W ft ab"V kvtn* I has boon caftated byslandards 1raced*4o to t~o Noflwan hisU of dSlaoclads and TectIObgy. or 10 # ccfto~on kattes orwwornoflnw StanWd'x C0rgx*o~onmfrr*nO or have boon dwod edtrcmoooviedvc*JOS oftololt~,dIAca constant ar haoe boen dwitved bv"1 "ot typoe co CdtXonlf t~dV**kLU5

i cctoltofl systemn caonform to 1tv soqtkenwntsd otNlSbNCL25031-1994 and AM~ W123-197B State of Texas Ooibrotlofl Ucenso No. L0-1 963-oference Instrumenfs and/or Sources:z ;Oarwms$N 0"1162 0-GI12 0rM565 0]5106 T1006"-T879 rE552 'IE651 0"720 0734 01616 ]NeutronAm-241BeS/NI-304

.)iaSIN C] BetaS/N _ _Other :_Am241-1.66

[rmO00S/N 38120 0 OscilloscopeS/IN . • MultimeterS/N 78401030

arobrated By:. _ , 0. A ,. Date _1_ _ _ _ _ __-_ _"

Re-vtewed By.h 1~)o Oj/~i Date _____________'

. a

Bench Test Data For Detector

IDetector - - 44-10 Serial No. A -Z2P733rCustomer WAYPOINT TECHNOLOGY GROUP

.inter 2221 Serial No. -2-/S",-f

Order#. 235778

Counter Input SensitMty L 3 . mV

Distance Source to Detector i .. .2e "Counft Tine I -j01"Other

High,Voltage Isotopp 4 Isotope

Size .fL , . SizeBackgroundIsotope

sizeIs)tope__

Size _____- I-

i6 . SL3 /16i37

.f $ L $30 __i___ ___

J/IL. ______ I /n ,o

-I-i

____ ___ __ _ ___ ____ _ ** __ ___ ____ ___

1*... .. _ _ _ _ _ _ _ _ _ I _ _ _

- !t____ ___ ___ ___ __ ___ ___ ___ ___ ____ ___ ___ ___ ___ ___ ___ __ ___ ___ ____ ___ ___ ___ ___ _ _ ___ ___ ___ ___ ____ ___ ___ '1 ___ ___ ___ ___ ___ ___

__________ ________________ ________________ ________________~ 1 ____________

Signature

D

Date 1-, , I2

.1

I "

/

COW=D

APPENDIX A-5


C C


Survey Unit Kaiser-FSSB-014Thorium Remedlation Project


C:

In-Service PeriodInstrument Model and Instrument Serial Detector Serial Survey Unit Kaiser-Detector Model/Type Number Number Calibration Period FSSB-014 UsageLudlum 2221 Scaler/ Field analysis, high-energy gamma detection -Rate Meter with 44-10 Instrument was used to evaluate remediation

2" X 2" Nal Scintillation progress and scan land areas for the Final StatusGamma Detector 216521 PR226935 4/6106 to 4/6/07 4/18106 - 6/27/06 Survey.

S:\P4000\PA4072\FSS Reports\Appendix A\Valume V\FSSB3-01 4)Table A-S-1 1

APPENDIX A-5-1



C


Instrument 9

C






Source DPM: I N/A

Radiation Detected: aamma4 * -

Acceptable Range:(Refer to Penn E&RHPM/M-2.1-1)

286.555 + 2a II 288.108 + 3c7II41 41 IIC~iibrntion Due: 416107 CONTACT 280,346 - 2a II1278,793 - 3a" 11

1

2

3

4

78

910

11

ClbainDe4//7 CONTACT 280------- - I2873-31. ......... . . ... .. . .. . . .. . .. _ _ " L

Background Source Net Source Batt check TTime Date Count Rate Count Rate Count Ratel Technician WIN +/- 2a (volts) WIIN +/- 3a

6:45 4/18/2006 9,519 294,202 284,683 DD YES 5.9 YES

8:10 4/19/2006 9,423 293,930 284,507 DD YES 5.8 j YES

6:50 4/22/2006 9,460 292,957 283,497 DW YES 5.8 j YES

7:30 I 4/27/2006 9,484 293,443 283,959 DD YES 5.8 YES

7:55 5/12/2006 9,403 291,495 282,092 DD YES 5.7 YES

7:40 I 5/25/2006 9,442 292,961 283,519 DD YES 5.6 f YES

7:20 5/27/2006 9,395 293,969 284,574 DW [ YES 5.5 YES

7:30 6/1/2006 9,578 292,365 282,787 DD I YES 5.6 _ YES I7:35 6/2/2006 9,578 291,552 281,974 DD [ YES 5.5 J YES

7:35 6/5/2006 9,541 294,178 284,637 DD YES 5.6 I YES

7:35 6/15/2006 9,500 293,114 283,614 DD I YES 5.9 YES

6:50 6/27/2006 9,493 295,324 285,831 DD YES 5.7 I YES



C


Instrument 9

C






Source DPM: N/A

Radiation Detected: oammaII -

Acceptable Range:(Refer to Penn E&RIHP/W-2.1-1)

9,482 +2a I1 9,652 +3a I,Ill=I Calibration Due: 4/6/07 6INCHES 8,800 - 2a

1

2

3

4

7

8

1(0

11

12

INCHES. ,11 8..... ..a

4/1Background Source Net Source Batt check W "3Date Count Rate ICount Rate Count Ratel Technician I WIIN +/- 2a (volts) W/IN +/- 3a

6 4/18/2006 9,519 J 18,417 8,898 DD YES 5.9 YES8:10 I 4/19/2006 9,423 18,644 9,221 DD YES 5.8 YES

6:50 4/22/2006 9,460 18,556 9,096 DW YES 5.8 YES

7:30 4/27/2006 9,484 18,563 9,079 DD YES 5.8 YES

7:55 5/12/2006 9,403 18,721 9,318 DD YES 5.7 YES

7:40 5/25/2006 9,442 18,360 8,918 DD YES 5.6 _YES

7:20 5/27/2006 9,395 18,319 8,924 DW YES 5.5 YES

7:30 6/1/2006 9,578 18,676 9,098 DD YES 5.6 YES

7:3516/2/2006 9,578 18,881 9,303 DD YES 5.5 YES

7:35 6/5/2006 9,541 18,718 9,1771 DD YES 5.6 YES

7:35 6/15/2006 9,500 18,600 9,100 DD YES 5.9 YES

6:50 6/27/2006 9,493 18,696 9,203 DD YES 5.7 YES


S:\P4000\PA4072\FSS ReportskAppendix A\Volume VFSSSBO14TSSB-014 Daily Check Log

.o .' -.-: " LUDLUM MEASUREMENTS, INC.n ncaT'AA APOST OFFICE BOXi8I0 PH. 325-235-5494

-Scenfirmic an'd Industrial CERTIFICATE OF CALIBRATION50OASTET FXO.353-4Imlumnls' •50S1 OAr. STREET " FAX NO. 325-235-46

SWEETWATER, TEXAS 79556, U.S.A.CUSTOMER PENN E&R ORDER NO. 2534641301201

Ludlum Measurements, Inc. Model 2221 Serial No. ____4 •g. Ludlum Measurements,. Inc. Model 44-10 Serial No. 7- 2

V,,,. .l. Date 6-Anr-06 Cal Due Date 6-Apt-07 Cal. Interval 1 Year J Melerface 202-159

Check mark fgapplies to applicable instr. and/or detector lAW mfg. spec. T.. 74 OF RH 37 1% Alt 691.8 mm H

O NewInstrument Instrument Received [;Wilhln Toler. +-10% []10-20% [ Out of To[. 5 Requking Repairi [] Other-See comments

(] Mechanical ck. -TMeterZeroed 5 Background Subtract (" Irtpul Sens. Uneadly(• F/S Resp. ck &T Reset ck. (• Window Operation d• deotropism(Z0udio ck. ] Alrm Setting ck. Ball. ck. (Min. Volt) 4.4 VDC .I3Calbraled In accordance with LMI SOP 14.8 rev 12/05189. []Calibrated In accordance wilh -LMI SOP 14.•? rev 02107197.

ThresholdInstrument Volt Set Comments V Input Sens. Comment mY Det. Oper. Comments V at lCny1fD mV Dial Patio 100 10I

SHV Readout (2 points) Ref./Inst. 5oo , V Ref.,•nst. 2000 L "..i•2.... V

COMMENTS:Peak settings Gross Counts Model 2221 currently setrHigh Voltage: 712v 950v for peak settings I

Threshold dial: 642 100(lomv) High voltage set with detectorWindow dial: 40 n/a connected.

Window Position: "IN" "OUT" IResolution for Cs137: wluCi 10% Firmware:26410-72Cal with a 5Ft. cable

3amm~ CaEZ1WL GM debocin pxK5ne pa~cfpnSaixi soumevz hsre MU 44-9 In w"N W li o(pob~e bes smmv.__________

RANGE/MULTIPLIERX119xlKX100.xl00

xl0

xlX1

REFERENCECAL POINT

400kcpm100kr'Pm4okcpm10kcpmAkcpmIkcom

4AOcpm10Ocpm

INSTRUMENT REC'D"AS FOUND READING"

INSTIRUMENTMEILR READING*dcn;/..

Of _1:"j_ A W I e C r. H&J 'V All aicallyREFERENCE

REFERENCECAL POINT

eaIout 400kcom

40{<com4kcpm

. 400cpm40cPm

INSTRUMENTRECEIVED

INSTRUMENTMETER READING* I REFERENCE

CAL POINT

-0fkm-

500cpm5kcpm

INSIREC

INSTRUMENTIETER READING

Agg

iuvM Measurenent. fnc. c&ullles that tNe above Inf*renI has been calxaaed byslondads froceoble so fth Nollonc n-O•ule of slondxds and rechnaler Intemikornal S1andls Orga•raWn asemnbe cr have bmen dered or accepted volues 0( nic&( pt*cal constants orave beem de4'ed by the

ie calbratlon syMlem conWomM to the requlements o(ANSI/NCSL Z540-1-1994 and ANSI H323-I 978 State of Texas

,eference Instruments and/or Sources::s.137GormoasIt 0n1162 0GI-12 0 M -035105 Cl-TO, 'T8779 0ES52 -ESSI 0720 0734 01616 N Neutron Am-241 Be S/N T-3

Alpha SIN

m 500 SIN

C] Beta S/N &T OtherAM-2,91-0 7A, Q

-54683 L Oscilloscope SlN • Multimeter SiN l

_ ~~Date _ _ _

70602489

'.ýk,--ated Bv:

Reviewed BYtAIZ.~ 4 "'I

I

Date 1ý A0I4I

*.T11*ceifircate shoo no be rep d6exceptn .t theMIton 6pa*ono rnMoom••s.ýn ' AC Inst. [j Passed Dielectc (I-r-Pot) and Continuity Test

II~iI * Desziqer and Manufoctuxerof

Scientific and ndursldalnstruments

* . - "LUDLUM MEASUREMENWS' INC.'•PdST OFFICE BOX 810'. PH. 32.5-235-5494501 OAK SIREET FAX NO. 325-235-46SWEETWATER, TEX/S 79556. U.S.A..

Bench Test Data For

Defector 44-10 Serial No..

Customer PENN E&R

Detector

Order#. j 253464/301201

Counter Input Sensitivity mV

Distance Source to Defector

Counter 2221 -Serial No.,

Count rime -6 ec,

2/(, R-(

Other

HighVoltage

Isotopes!7e!,___Background

Isotope IsotopeSize Size

jsotope

Size

)qOc .'It _ )70-62-H coi

__

____________________________ __________________________________________________ I_____________________________ _____________________________________________________ _____________________________________________________ I_____________________________________________I_

_____________________________ _________________________________ _______________________________________________________ ________________________________________________________ _______________________________________________________ _______________________________________________I

J- t , 64cSignature Date

Uc.?. ~ * . *.-- .~ ~ *!.~ - - *tsn

FORM C4A 04109•

APPENDIX A-6


CAppendix A-6, Table A-6-1

Final Status Survey Instrument SummarySurvey Unit Kaiser-FSSB-015Thorium Remediation Project


C

In-Service PeriodInstrument Model and Instrument Serial Detector Serial Survey Unit Kaiser-Detector Model/Type Number Number Calibration Period FSSB-015 UsageLudlum 2221 Scaler/ Field analysis, high-energy gamma detection -Rate Meter with 44-10 Instrument was used to evaluate remediation

2" X 2" Nal Scintillation progress and scan land areas for the Final StatusGamma Detector 216521 PR226935 416/06 to 4/6/07 5/25/06 - 6/27/06 Survey.

S:\P4000\PA4072\FSS Reports\Appendix A\Volume V\FSSB-015\Table A-6-1 I

APPENDIX A-6-1



C

Form HPWM-2-6-1Daily Check Log for Ludlum Model 2221 with 44-10 Detector

Instrument 9

C






Source DPM: N/A

Radiation Detected: gamma*

Acceptable Range:(Refer to Penn E&R/HPM/M-2-1-1)

286,555 + 2a 11288.108 + 3a41 41

Calibration Due: 4/6/07 CONTACT 280,346 - 2u 11278,793 - 3a

1

2

3

4

12

Date Count Rate Count Rate Count Ratel Technician WIN +/- 2a (volts) W/IN +1- 3a

7:40 5/25/2006 9,442 292,961 283,519 DDO YES 5.6 YES

7:20 5/27/2006 9,395 293,969 284,574 DW YES 5.5 YES

7:30 6/1/2006 9,578 292,365 282,787 DD I YES j 5.6 YES7:35 6/2/2006 9,578 291,552 281,974 DD J YES 5.5 YES

7:35 6/5/2006 9,541 294,178 284,637 DD YES 5.6 YES

7:35 6/15/2006 9,500 293,114 283,614 DD YES 5.9 YES

6:50 6/27/2006 9,493 295,324 285,831 D[ YES 5.7 YES


S:\P4000\PA4072\FSS Reports\Appendix A\Volume VAFSSB-01 5FSSB-015 Daily Check Log

C C


Instrument 9

C






Source DPM: I N/A


Acceptable Range:(Refer to Penn E&RPHPMWM-2-1 -1)

9,482 + 2a II 9,652 + 3a II4/6/1n7 6 INCHElS 8.800 - 2a II 8.692 - 3a II

1

2

3

4

5

6

12

.......... ...... 4 . 7 6 I 11 8,69 - 3_ ii

SBackground source Net Source Batt checkTime Date Count Rate Count Rate Count Rate Technician WIN +/- 2a (volts) W/IN +/- 3a]7:40 5/25/2006 9,442 18,360 8,918 DD YES 5.6 YES =7:20 5/27/2006 9,395 18,319 8,924 DW YES 5.5 J YES+17:30 6/1/2006 9,578 18,676 9,098 DD YES 5.6 j YES7:35 6/2/2006 9,578 18,881 9,303 DD YES 5.5 j YES7:35 6/5/2006 9,541 18,718 9,177 DD YES 5.6 J YES7:35 6/15/2006 9,500 18,600 9,100 DD YES 5.9 J YES

6:50 6/27/2006 9,493 18,696 9,203 OD D YES 5.7 J YES


S:\P4000\PA4072\FSS Reports\Appendix A\Volume VAFSSB-015TFSSB-015 Daily Check Log

of-- . -/ LUDLUM MEASUREMENTS, INC.Eci a POST OFFICE BOXiB10 PH. 325-235-5494

Sdenfi& and Indusida CERTIFI'CATE OF CALIBRATION 501 OAK STREE FAX NO. 325-235-46A InstrumentsSWEETWATER, TEXAS 79556, U.S.A.

CUSTOMER PENN E&R ORDER N). 253464/301201

tudlum Measurements, Inc. Model 2221 Seral No. . • i ii/, 'fg. Ludlum Measurements, Inc, Model 44-10 Serial No. !

-it. Date 6-Anr-a6 Cal Due Date &-Apr-97 Cal. Interval I Year J Meterface 202-159

Check mark [gapplies to applicable instr. and/or detector lAW mfg. spec. T.. 7A OF RH 37 -11% Alt 691.8 mm H

o New Instrument Instrument Received (3Within Toler. +-10% C] 10-20% - Out of To(. [] Requiring Repairi 5] Other-See comments

(• Mechanical cLk Meter Zeroed 0 Background Subtract [" Input Sens. Uneodly[• F/S Resp. ck ( Reset ck. " Window Operation [d deotropism[ Udio ck. 0 Alarm Setting ck. ( Balt. ck. (Min. Volt) 4.4 VDC

[ a Clibrated in accordance with LMI SOP 14.8 rev 12/05/89. 5 Calibrated In accordance with LMI SOP 14.? rev 02/07/97.Threshold

Instrument Volt Set Comments V Input Sens. Comment mV Del. Oper. Comments V at Com.-en mV Dial Fafio 100 10

(" IV Readout (2 points) RefJInsl. 500 / . V Ref./Inst. 2000 1 ./ 2 0&3 V

COMMENTS:Peak settings Gross Counts Model 2221 currently seliHigh Voltage: 712v 950v for peak settings I

Threshold dial: 642 100(10mv) High voltage set with dqtectorWindow dial: 40 n/a connected.

Window Position: "IN" "OUT" IResolution for Cs137: -luCi 10% Firmware:26L10-72Cal with a 5Ft. cable

3ima s Ca5n CMI

RANGE/MULTIPLIERxl1KxlKxl00xl00X10x10xlX1

oLuced/intYvni4m± 10% CJ

REFERENCECAL. POINT

400kciom100kcPM40kcp~m10k=p4kcpm

Ikcpm-400cprn1 NIL-r

INSTRUMENT REC'D"AS FOUND READING"

IW

W%=OlkJl | |

REFERENCE INSTRUMENT INSTRUMENT REFERENCE INSTRUMENTi INSTRUMENTCAL POINT RECEIVED METER READING' CAL POINT RECEIVED M METER READING

eadout 40klm Q* Scale ....... pmi L•A 5k1qrA4apm 1 0l 50 om k4kcpm qO •5kcpm t; k•40corn" 50cpm. -r,• I SDI

K'lurn Measurent. inc. kvmi tihes the d above h*men1 has been ea•ated by standords fraceabte to #he tn kum ve of Standads and 'oIr, a the caton kfaies oShe Intetna anOi Slndards 0•uWr*Ogan Inen, ar hafe been deted fro a• ted Values of nalwal pt.od comiants arhve beow =W•yb'e tallo lep o cbe coitxatlofn system confonm lo the requtkements of AtISINCSL Z540-1-1994 and ANSI N323-1978 State of Texas oalrofion Lcense No. LO-1I

Reference Instruments and/or Sources:-s-,37GoammaS/N 0-1162 -IG112JM56s 015105 0ITIo0E8-79 0E-52 -ESs 0l720 0734 [11,16 []NeutronArn-241 BeS/NT-3

Alpha SIN__ _ Beta SIN __ Other i AM-241--0,78uCi

mn 500 SIN k54683 E] oscilloscope Si'( Muttime ter S/tm 70602489

ta'ibrated By: Date (i, -A 4•

Reviewed By:`_r_._______________________he _______n_______s__"__ Dale _Assd _____(____ndo_._____

.T1S lrcat-eshot not bercprodued exc~ept In (ut Ah vvthA lthe Y-sitten 6apio ts,;nc.enen ACi~t Test.*~ ~~~ ~~~~~ nc- AC ~ opto uu Moto InsLi Passed Diclectd~c (tKl-Pot) and ConfniyTs

"9

II~3I De3sgner and Manufacturerof

Scientiri6 and IndustratInstruments

' LUDLUM MEASUREMENtS, INC..POST OFFICE BOX ,'O". PH. 32$-235-5494501 OAK STREET . FAX NO. 325-235-46SWEE•WATER. TEX4S 79556, U.S.A.

Bench Test Data For Detector

Detector 44-10 Serial No.__

Customer PENN E&R Order. #. 253464/301201

Counter 2221 "Serial 1,

Count rime ee.

Other

0.•¢,•• Counter Input Sensitivity /I mV

Distance Source to Detector _

HighVoltage

Isotope_ -ZfSize ' "Background

IsotopeSize

IsotopeSize

IsotopeSize

ID hi io fzoo _

)Ic•3 .,,II• •

ASO_ D e _ _

AcIc2~6~Signature I

I

I J J J • i I

U

D

FORM C.4A 04,V92O=

APPENDIX B

DECOMMISSIONING PLAN CHAPTER 14.0

Table of Contents

-Page

14.0 Facility Radiation Surveys 14-114.1 Release Criteria 14-114.2 Characterization Surveys 14-3

14.2.1 ADA 1994 14-414.2.2 ARS 1995 14-414.2.3 Adjacent Land Remediation Plan Appendix A 14-514.2.4 Summary 14-5

14.3 Remedial Action Support Surveys 14-614.4 Final Status Survey Design 14-9

14.4.1 Survey Objective 14-914.4.2 Basic Design 14-9

14.4.2.1 MARSSIM's Wilcoxon Rank Sum Test 14-914.4.2.2 Discrete Soil Sampling 14-1014.4.2.3 Scanning 14-1114.4.2.4 Null Hypothesis 14-1214.4.2.5 Decision Error Rates 14-12

14.5 Use of a Surrogate Radionuclide 14-1214.6 Establishing Background 14-1314.7 Area Classifications 14-13

14.7.1 Process for Reassignment of Area Classifications 14-1514.7.2 Classification Upgrades 14-1514.7.3 Classification Downgrades 14-1614.7.4 Documentation of Classification Changes 14-16

14.8 Selection of Survey Units 14-1614.9 Field Instrumentation 14-1614.10Laboratory Analysis 14-2014.11 Sampling and Measurement Technique 14-21

14.11.1 Surface Scans 14-2114.11.2 On Site Gamma Spectrometry 14-2114.11.3 Soil Sampling 14-21

14.11.3.1 Surface Sampling 14-2114.11.3.2 Core Sampling 14-21

14.12Final Status Survey Implementation 14-2214.12.1 Postremediation Surveys 14-22

14.12.1.1 Gamma Scans 14-2214.12.1.2 Grids 14-2214.12.1.3 Sample Number 14-2214.12.1.4 Data Evaluation 14-22

14.12.2 Postremediation Surveys for Returned Overburden Material 14-2214.13Data Evaluation 14-23

14.13.1 Preliminary Data Review 14-2314.13.2 Data Evaluation and Conversion 14-2414.13.3 Investigation Levels 14-26

14.14Final Status Survey Report 14-27

(Rev. 9/05)

14.0 Facility Radiation Surveys

This chapter presents the general framework for facility radiation surveys relative to the decommissioning

of the Tulsa facility. The chapter focuses on the 14-acre Pond Parcel area. Supplemental information

relative to facility radiation surveys for the "former operational area" of the facility is provided in Chapter

14.0 of the May 2002 DPA (Revised May 2003).

14.1 Release Criteria

The site will be remediated in accordance with decommissioning criteria of Subpart E, Radiological

Criteria for License Termination of 10 CFR Part 20, Standards of Protection Against Radiation. Specifi-

cally, Subpart E, 10 CFR 20.1402, Radiological Criteria for Unrestricted Use, allows release of a site for

unrestricted use if the residual radioactivity distinguishable from background results in a TEDE to an

average member of the critical group that does not exceed 25 mrem/yr and the residual radioactivity has

been reduced to levels that are ALARA.

Dose modeling is used to estimate the TEDE to the average member of the critical group (that group rea-

sonably expected to receive the greatest exposure to residual radioactivity for any applicable circum-

stances). The concentration of residual radioactivity (per radionuclide) distinguishable from background

that, if distributed uniformly throughout a survey unit, results in a TEDE of 25 mrem in 1 year to an aver-

age member of the critical group is the single-radionuclide DCGLw. Preliminary DCGLw values for the

radionuclides of concern at the Kaiser site have been calculated using the guidance provided in NUREG-

1549, Decision Methods for Dose Assessment to Comply With Radiological Criteria for License Termi-

nation. In order to account for the presence of multiple radionuclides, the Unity Rule was applied, and

DCGLW values adjusted as shown in Table 14-1.

Table 14-1DCGLw Values

AverageConcentration Adjusted

Single Ratio to Th-232 with Th-232 at DCGLw to MeetRadionuclide Assuming Single Rad Unity Rule

Radionuclide DCGLw (pCi/g) Equilibration DCGLw (pCi/g) (pCi/g)Pb-210 1.751 0.043 0.15 0.12Ra-226 5.9 0.082 0.28 0.24Ra-228 4.3 1 3.4 3Th-228 3.4 1 3.4 3Th-230 102 3.5 12 10Th-232 3.4 1 3.4 3

(Rev. 9/05)

14-2

In developing the remedial action plan, a derived cutoff concentration level (DCCL) of 31.1 pCi/g Th-232

has been determined. This value represents the dividing line concentration between material which must

be exported to an off-site disposal facility and material which can remain on site under an unrestricted

release scenario. Based upon kriging analyses (Appendix A), on average, material above the DCCL is

exempt. Moreover, the kriging volume estimates together with the dose assessment presented in Chap-

ter 5.0 demonstrate that unrestricted release dose levels can be achieved when material below the DCCL

is returned to the excavation as described in Chapter 8.0. The average concentration of below-criteria

material remaining on site is termed herein as the Average Derived Concentration Level (ADCL). Based

upon dose evaluations, the ADCL, rounded to 7 pCi/g Th-232, results in a postremediation TEDE well

below I mrem/yr.

The three important threshold concentration criteria and their significance are summarized below in

Table 14-2.

Table 14-2Threshold Concentration Criteria

ValueParameter (pCi/g Th-232) Application

DCGLw 3.0 Release criterion for soilstockpile/processing area

DCCL 31.1 Dividing line for off-site disposalof material

ADCL 7.0 Estimated average concentrationof material left on site as backfill

Table 14-3 presents area factors (based upon MARSSIM guidance) to be used for elevated measurement

comparisons (EMC) and to determine sampling requirements in situations where the scan instrument's

minimum detectable concentration is greater than the DCGLw or DCCL depending on the survey area.

The DCGLEmc values applicable to the stockpile/processing area are calculated by multiplying the

DCGLw by the area factors presented in Table 14-3. DCGLEmc values are presented in Table 14-4.

DCGLEmc = Area Factor * DCGLw

For the segregated material below 31.1 pCi/g of Th-232 left onsite as backfill, the ADCL value was

multiplied by the area factors presented in Table 14-3 and the results are presented in Table 14-5.

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14-3

ADCLEmc = Area Factor * ADCL

However, since the material used as backfill is material below 31.1 pCi/g of Th-232, the elevated

measurement comparison is only applicable to concentrations exceeding 31.1 pCilg of Th-232. The

ADCL value of 7 pCi/g of Th-232 was conservatively used to establish elevated measurement criteria for

the backfill material greater than 31.1 pCi/g of Th-232, to maintain the average concentration of the

backfill material ALARA.

Table 14-3Area Factors

Area Factors

Radio- I M2 3m2 IOm 2 30m 2 100w 2 300m 2 1,000 W2 3,000 m2 10,000 m2

nuclide (11 fi2) (32 ft2) (1080f2) (323 fl2) (1,076 f2) (3,229 f2) (10,764 f2) (32,292 ft2) (107,639 f12)

Th-232 12.5 6.2 3.2 2.3 1.8 1.5 1.1 1.0 1.0

Table 14-4DCGLEMC Values for Processing Area

DCGLEMC (pCi/g)Radio- I M2 3m2 O2 2 300m2 1,000 m2 3,000 m2 10,000 W

nuclide (llft2 ) (32 f2) (108 fi2) (323 f2) (1,076 e) (3,229 )2) (32,292 f2) (107,639 f12)Th-232 37.5 18.6 9.6 6.9 5.4 4.5 3.3 3.0 3.0

Table 14-5ADCLEMC Values for Excavation Areas

ADCL c (pCi/g)

Radio- I 1m2 3m 2 lOre2 30m2 IOOmW 300w 2n 1,000 W 3,000 m2 10,000 m2

nuclide (11 ef2) (32 12) (108 e2) (323 1) (1,076 f1) (3,229 f2) (10,76412) (32,292 ft2 (107,639f 2)Th-232 87.5 43.4 22.4 16.1 12.6 10.5 7.7 7.0 7.0

14.2 Characterization Surveys

A series of radiological characterization surveys of the site have been performed from 1994 to 2001. A

summary of each survey is provided.

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14.2.1 ADA 1994

In February of 1994, the site was divided into eight sections and a gamma walk-over survey was per-

formed. Measurements were taken at 1 m above the ground every 15 feet. A Ludlum Model 3-97 Survey

Meter (internal 1-inch-by-i-inch Nal [TI] scintillator detector) calibrated to read micro-Roentgen per hour

(pR/hr) was used. Background was established as 10 pR/hr, and readings of greater than twice back-

ground were observed in all eight sections of the site including a maximum of 400 pR/hr. Five 18-inch

core boring samples, one background core boring, and four additional soil samples from test digs were

taken. The samples were oven dried at approximately 50TC for 12 hours and then counted for a minimum

of 100 minutes using an ORTEC Multichannel Analyzer connected to a Canberra High Purity Intrinsic

Germanium Detector. Analytical results confirmed the presence of Th-228 in secular equilibrium with

Th-232. Th-230 (from the natural uranium decay chain) also was identified. The Th-230 was 2.4 to 3.4

times the Th-232 activity.

14.2.2 ARS 1995

In October of 1994, a more extensive characterization of the site was performed. Two hundred and fifty

samples were systematically collected from 90 borehole locations. Samples were collected in 500-mil

Marinelli containers, weighed to the nearest 0.1 g, and counted for 10 minutes with a shielded 2-inch-by-

2-inch NaI (TI) scintillator detector. The instrument was a Bicron LabTech Dual Channel Analyzer.

Sixty 200-ml subsamples were taken from the 250 field samples. Subsamples were analyzed using a den-

sity compensating gamma spectroscopy system (Nuclear Fuel Systems, Inc.) for U-234, U-235, U-238,

and Th-232. Referred to as the At Line Solution Assay System (ALSAS), it provided density corrected

pCi/g values. A correlation coefficient (r) of 0.990 relating the total counts of the field 2-inch-by-2-inch

Nal (TI) detector field count to the analytical results (pCi/g) of the same sample was completed. Linear

regression Was used to determine an equation to calculate pCi/g values from counts. The results of the

survey were total thorium (Th-232 + Th-228) pCi/g values ranging from below the MDA of 1 pCi/g to

425.6 pCi/g.

Alpha spectroscopy was performed on 11 of the samples and confirmed the previously established ratio of

Th-232 to Th-230 in dross of between 1:2.4 and 1:3.4. The 11 samples were selected from 60 sample

results that fell in the 1 to 50 pCi/g total thorium range. The 11 samples represented 3 of the 4 main areas

surveyed including the Retention Pond, the Reserve Pond, and the land area between the railroad and the

Retention Pond. The ratios calculated from these data ranged from 1:0.62 to 1:3.15. Data were consistent

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with previous characterization survey results and were used to estimate volumes of contaminated material

and to map contamination at depth.

Surface water from the Retention Pond (two samples) and from Fulton Creek (one sample) were collected

and analyzed by gamma spectroscopy. Results were below the MDA value of approximately 1.0 pCi/i

Th-232.

14.2.3 Adiacent Land Remediation Plan Appendix A

In 1999, 24 samples were selected (on site) to confirm the Th-232 to Th-230 ratio in the dross. The sam-

ples were selected based on geographical distribution and included both the Retention and Reserve ponds

and a range of depths. The data approximate the ratio to be 1:3.5. This ratio was used to calculate the

Th-230 activity based on the measured Th-232 activity during Phase I remediation of adjacent (to Kaiser

property) land.

14.2.4 Summary

NUREG-1575 (MARSSIM) defines areas that have no reasonable potential for residual contamination as

"nonimpacted." These areas have no radiological impact from site operations. Areas with some potential

for residual contamination are defined as "impacted." Impacted areas are further divided into Class 1, 2,

or 3 areas based on the potential for contamination.

The former Freshwater Pond area is nonimpacted. Results of characterization surveys indicate that the

remainder of the pond parcel east of the former Freshwater Pond area is impacted. The land areas have

been classified in accordance with MARSSIM based on the existing characterization survey data. The

classification is provided in the Final Status Survey Design section below. In addition, part of the

adjacent land was impacted and was remediated in 2000-2001. The adjacent land area was surveyed

under NUREG/CR-5849 and the unrestricted release approved by the NRC in 2002. Therefore, the entire

area adjacent to the site as delineated by grids in Figure 2-4, is not addressed in this phase of

decommissioning.

In addition to the characterization events detailed in Sections 14.2.1, 14.2.2, and 14.2.3, composite

samples of characterization core samples and final status samples were taken during adjacent land

remediation surveys. The composite samples were analyzed by alpha spectroscopy to further evaluate the

Th-232 to Th-230 activity ratio. The results yielded Th-232 to Th-230 ratios from 1:0.32 to 1:2.95. A

summary of soil sample analyses performed to calculate the ratio of Th-232 to Th-230 activity is

presented in the table below. A compilation of the analytical data used to calculate the ratio of Th-232 to

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14-6

Th-230 is presented in Appendix E. The established ratio of Th-232 to Th-230 of 1:3.5 will continue to

be used during Phase II of the decommissioning of the site because this is the most conservative

(protective) approach. A summary of sample result Th-232 to Th-230 activity ratios for the Kaiser site is

provided in Table 14-6 below.

Table 14-6

Measured Th-232 to Th-230 Ratios

Number of Minimum Ratio of Maximum Ratio of Average Ratio ofReference Samples Th-232:Th-230 Th-232:Th-230 Th-232:Th-230ADA 1994 3 1:2.4 1:3.4 NAARS 1995 11 1:0.6 1:3.1 1:1.7Kaiser 1999 24 1:1.5 1:6.4 1:3.4ES 2002 14 1:0.32 1:3.0 1:2.1

Characterization activities concerning water sample analysis have also shown that the contaminated

material is not soluble.

The characterization of the site is complete. Extensive characterization surveys and sample analysis have

been reviewed to provide the initial classification of the site open land areas and structural surfaces. The

majority of the land area is impacted and classified as Class 1. The only nonimpacted area is the

Freshwater Pond parcel based on site history and the adjacent land based on final status survey results.

The only identified subsurface structural surface is the spillway. The spillway is classified as impacted

Class 1. All additional subsurface structures discovered during excavation in Class 1 open land areas will

be classified as Class 1. Reclassification of any areas would be based on final status survey

measurements secured as detailed in the following parts of Section 14.0.

14.3 Remedial Action Support Surveys

Segregation of impacted soil during remediation may be aided by an automated system equipped with Nal

(or equivalent) gamma detectors. Alternatively, HPTs may segregate impacted soil using portable survey

instruments equipped with NaI detectors. Both detection methods have the sensitivity to detect Th-232

(surrogate radionuclide) below the most restrictive threshold value of 3 pCi/g above background. Th-232

is an alpha emitter but is in secular equilibrium with several progeny that emit high-energy photons.

Detection of Th-232 is based on the detection of these high-energy photons. Table 14-7 provides MDC

values calculated using the guidance provided in NUREG-1575, MARSSIM, for increasing background

values. The calculation of MDC is based on the detection of high-energy emitting Th-232 progeny.

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14-7

Table 14-7MARSSIM Calculated Minimum Detectable Concentration Values

For Increasing Background (2-inch-by-2-inch Nal Detectors)

Scan MinimumScan Minimum Detectable

Minimum Detectable Detectable Concentration (pCi/gBackground (cpm) Count Rate (ncpm) Concentration (gR/hr) Th-232)

3,000 585 1.00 1.05,000 756 1.29 1.37,000 894 1.52 1.59,000 1,014 1.73 1.711,000 1,121 1.91 1.913,000 1,219 2.08 2.115,000 1,309 2.23 2.216,000 1,352 2.30 2.317,000 1,394 2.37 2.318,000 1,434 2.44 2.419,000 1,473 2.51 2.520,000 1,512 2.58 2.521,000 1,549 2.64 2.6

Remedial action support surveys will be performed while remediation is being conducted and will guide

the remedial action in a real-time mode. These surveys will be used to determine when a survey unit is

ready for the final status survey. The remedial action surveys will rely principally on direct radiation

measurement using gamma-sensitive instrumentation. Scan MDC will be determined for remediation

survey instrumentation using the same protocol as final status surveys. The determination of a survey

unit's readiness for a final status survey will rely on the on-site knowledge of the area (i.e., kriging

information and area classification) and the results from the survey instrumentation.

During remediation, excavated material will be characterized into one of the following four categories

based on physical description and/or radiological survey:

* Contaminated Soil (or soil-like material) - Soil above the DCGLw or DCCL value for theprocessing and Retention Pond areas respectively.

* Acceptable Backfill Soil (or soil-like material) - Soil containing radioactivity above theDCGLw but below the DCCL value.

* Suspect Contaminated Soil (or soil like material) - Soil which requires additionalcharacterization for the determination of whether it is below the DCGLw or DCCL value.

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Debris (Structural Surface Survey Material) - Nonsoil material that is oversized (e.g.,concrete fragments, bricks, and construction debris). Surveys of debris consist of surveysof structural surfaces for total (fixed) and removable contamination in units ofdisintegrations per minute per one hundred centimeters squared (dpm/1 00 cm2).

Debris is subdivided into two categories: 1) removable debris that can be easily removed from an

excavation and 2) permanent structures such as the concrete spillway contained beneath Characterization

Grids 1-4 (ALRP). Removable debris will be segregated from soil to the extent practical by visual

inspection. Debris buried within the dross and soil mixture will be evaluated in accordance with NRC

Fuel Cycle Policy and Guidance Directive FC 83-23 to determine whether they are potential candidates

for clearance surveys considering such factors as volumetric contamination and accessibility of surfaces

for survey. Clearance surveys may be performed if large, nonporous, solid debris with only surface

contamination are uncovered during residue excavation. In this case, clearance surveys for total and loose

alpha will be performed on the debris to ensure that released items are released in accordance with NRC

Fuel Cycle Policy and Guidance Directive FC 83-23. Otherwise, debris material will be packaged to meet

the applicable disposal facility waste acceptance criteria. Permanent structures will be surveyed for

unrestricted release in accordance with the guidance provided in the May 2002 DPA and the May 2005

Technical Addendum for structural surface surveys.

The area containing the Characterization Grids 1-4 (ALRP) is known to contain a concrete spillway. As

shown in Figure 4-1, the spillway starts slightly west of Characterization Grid 1 and runs from west to

east. The spillway turns north at Characterization Grid 4 and proceeds toward the Retention Pond. The

spillway is considered a permanent structure and will be surveyed as a Class 1 structure.

Additional subsurface structures may be encountered during excavation. The structures will first be

categorized as permanent or removable. If the structures are permanent, a final status survey of structural

surfaces will be performed. Since thorium is highly insoluble, it is not anticipated that structures will be

volumetrically contaminated. However, subsurface culverts and/or piping may be encountered.

Structures with internal surfaces will receive final status surveys of both external and internal surfaces.

Consideration will be given to nonaccessible surfaces. Residues, sediments, and/or liquids encountered

will be collected and held for sampling. Based on the results of the sample analysis, the material will be

dispositioned accordingly. Gas proportional detectors will be used to survey structural surfaces when

possible. The final and clearance survey protocols for structures are detailed in subsequent parts of

Chapter 14.0. Soil and/or soil like material surrounding structures will be segregated in accordance with

this plan.

(Rev. 9/05)

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Based on survey instrument DCCL, DCGLw, and ADCL values, survey instrumentation threshold values

will be determined. The lower bound threshold is the value below which surveyed soil is acceptable

backfill soil. The upper bound threshold is the value above which surveyed soil is contaminated soil.

The two threshold values will be conservatively set based on empirical data (e.g., the lower bound thresh-

old value will be set at the average net counts per minute [ncpm] value corresponding to the DCGLw less

one standard deviation and the upper bound threshold will be set at the average plus one standard devia-

tion) to ensure that soil is acceptable backfill or that soil is contaminated. The average ncpm value will be

derived from empirical data and will be continually checked as survey and analytical data are collected.

Soil surveyed with results between the two threshold values will be stockpiled as suspect contaminated

soil and will be sampled for laboratory analysis to determine if the soil is acceptable backfill or

contaminated.

14.4 Final Status Survey Design

14.4.1 Survey Objective

The objective of this survey is to demonstrate that residual radioactivity levels meet the site release

criteria.

14.4.2 Basic Design

14.4.2.1 MARSSIM's Wilcoxon Rank Sum Test

The final status survey will use systematic grid sampling to determine the average radionuclide concen-

tration in a survey unit and gross gamma scans to screen for elevated areas. At least the minimum

number of samples (N/2) will be taken in each survey unit. Since the radionuclides of interest occur

naturally in background, the minimum number of samples (N/2) from the reference background area will

also be used to complete the Wilcoxon Rank Sum (WRS) Test.

Minimum Number of Samples (N12)

When using the WRS test, the minimum number of samples (N/2) is the number of samples required in

the survey unit and in the reference background area. Hence "N" is the total number of samples required

to complete the WRS test. Paramount to determining the minimum number of samples is the

determination of the relative shift, delta over sigma (A/o). Delta is equal to the DCGL minus the lower

bound gray region (LBGR) value. The LBGR value is arbitrarily set at one-half the DCGL value to start

(Rev. 9/05)

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the determination. Sigma is an estimate of the variability in a set of sample analysis results from a survey

unit. The estimate of sigma used is based on the standard deviations in Th-232 activity measured in

survey units during the final status sampling of the adjacent land remediation final survey (0.42). Sigma

may be increased if the spatial variability of contaminants within a given survey unit is expected to be

greater than 0.42. Since the Th-232 activity concentration of 3.0 pCi/g will be used as the surrogate

DCGLw, A is equal to 3.0 - 1.5, or 1.5. Delta divided by the sigma of 0.42 results in a relative shift of

3.57 which is rounded to 3.5 for the purpose of determining the required number of samples. The number

of samples can be calculated using the following formula or looked up in Table 5.3 of MARSSIM:

(Z1'• + Z2 "f)2

3(P, -0.5)2

where:ZIa = percentile represented by selected value of ., Table 5.2 of MARSSIMZI-p = percentile represented by selected value of P, Table 5.2 of MARSSIMPr = value obtained from Table 5.1 of MARSSIM

Based on a relative shift of 3.5, the following number of samples are required to meet the DQOs:

Number of SamplingSize of Survey Unit Class DQOs for a and I3 Locations

> 10 m2 <2,000 m2 1 0.05,0.05 9> 2,000 m 2 and <10,000 m2 2 0.05, 0.05 9

> 10,000 m2 3 0.05,0.05 9

Likewise for surveys of the backfill material the number of samples is 9 corresponding to a relative shift

of 3.5, based on the DCCL value of 31.1, the LBGR of 15.6 and a sigma estimate of 4.4 pCi/g.

The number of samples in the above table includes a factor to increase the number of required samples by

20 percent, as recommended by MARSSIM, to allow for lost or unusable data. The number of required

samples may be further increased to increase the power level of the statistical tests. Additional sampling

locations may also be necessary if characterization data and remedial action surveys and sampling

indicate that there is greater than expected spatial variability (a)of sample results within specific survey

units.

14.4.2.2 Discrete Soil Sampling

The results of discrete soil sampling will be used to verify that the average soil concentration is less than

the appropriate DCGLw or DCCL values. Regardless of the survey unit classification (Class 1, Class 2,

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or Class 3), a predetermined minimum number of samples will be collected in each survey unit. A

random-start triangular grid pattern will be used in Class 1 and Class 2 survey units. This sampling

pattern is generally the most efficient means of identifying small areas of elevated activity. The distance

between the grid nodes (L) will be determined by

L = [AI(0.866 x.n)] V/2

where A is the survey unit area to be covered by the grid pattern and n is the number of samples.

The random start point will be selected by use of readily available random point generators such as

provided by the spreadsheet Excel. Sample points will be located by use of a global positioning system

(GPS) or equivalent survey equipment.

14.4.2.3 Scanning

Scanning surveys will be used to identify small areas of elevated activity. The percentage of the survey

unit to be covered by scans will be based upon the survey unit classification in accordance with the

following table.

Table 14-8

Survey UnitClassification Scanning Coverage

Class 1 100 percent coverageClass 2 10 to 100 percent

Systematic and______________ udgmental

Class 3 Judgmental

One hundred percent coverage means that the entire surface area of the survey unit has been covered by

the field of view of the detector. The scanning coverage for Class 1 areas will be 100 per-cent. The

scanning coverage for Class 2 areas will be adjusted based on the level of confidence supplied by existing

data. Whenever less than 100 percent of the survey unit is scanned, the Data Manager will determine the

degree of scan coverage and which areas are to be scanned based on the information available at the time

of survey. For example, if the potential for contamination in a section of the survey unit is higher than the

rest, i.e., the section that borders a Class I survey unit, this section may receive 100 percent coverage,

while the remaining section may receive 50 percent systematic coverage. If the survey unit has an equally

unlikely potential for contamination, e.g., isolated with no previous history of contamination, a systematic

coverage at 25 percent coverage may be appropriate.

(Rev. 9/05)

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14.4.2.4 Null Hypothesis

The null hypothesis (IL) to be tested is that the residual contamination exceeds the remedial objective

(release criteria are not met) and the alternative hypothesis (HA) is that the residual contamination meets

the remedial objective (release criteria is met).

14.4.2.5 Decision Error Rates

There are two types of decision errors as shown below:

DECISION/OUTCOME OF STATISTICAL TESTReject HI Accept Ho

TRUE CONDITION Meets remedial Incorrectly fail toOF SURVEY UNIT objective (below No decision error release survey unit

DCGLw) (probability = 1 -a) Type II error

(probability = 13)Exceeds remedial Incorrectly releaseobjective (exceeds survey unit No decision error

DCGLw) Type I error (probability = I - 13)(probability = a)

Examination of this table highlights the importance of limiting the Type I error rate (or a) in terms of

protection of human health and the environment. The DQO selected for a is 0.05. The DQO selected for

P3 is 0.05.

14.5 Use of a Surrogate Radionuclide

Characterization activities have verified that the primary radionuclides of concern are isotopes of thorium.

Th-232 and Th-228 are part of the natural thorium decay chain and have been verified to be in secular

equilibrium (i.e., the activity of Th-228 is equal to that of Th-232). Another isotope of thorium, Th-230,

has been identified as a primary radionuclide of concern. Although Th-230 is part of the natural uranium

decay chain, no uranium has been identified. However, in the estimated 55 years since Th-230 was sepa-

rated from the uranium decay chain, some Ra-226, a member of the decay chain below Th-230, has

grown in. The relationship of Th-230 activity to that of Th-232 has been established in previous charac-

terization of the site. The relationship of Th-230 activity is 3.5 times Th-232 activity. Not all of the

radionuclides present can be identified by real-time gamma surveys or by gamma spectroscopy of soil

samples--the most efficient and cost-effective measurements. In addition, each of the radionuclides con-

tributes to the total dose to varying degrees of magnitude. In order to save both time and resources, it is

(Rev. 9/05)

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desirable to select a surrogate radionuclide to demonstrate compliance for all the radionuclides and to

guide remediation activities. Th-232 has been selected as the surrogate radionuclide.

14.6 Establishing Background

Appendix F contains the reference area, surface soil, and background data consisting of two different

reference areas located approximately 1 mile apart. The results of 30 different sampling locations in each

reference area presented in the Adjacent Land Characterization, Kaiser Aluminum Specialty Products,

Appendix A, Estimate of Volume of Off-Site Contaminated Soil, Adjacent Land Characterization Report,

ADA, March 1999. These data were also used for the background determination during the Kaiser

Adjacent Land Area Remediation Project. Based on a review of the data in both reference areas, there

appears to be no significant variability between the two reference areas that were sampled. The mean

Th-232 concentration in the reference area located on the nonimpacted northwest Kaiser property is 0.94

+/- 0.11 pCi/g at the 95 percent confidence level, and mean Th-232 concentration in a reference area

located approximately 1 mile away is 1.06 +/- 0.10 pCi/g at the 95 percent confidence level. The

reference area data standard deviations were 0.30 and 0.28 respectively. According to NUREG 1727,

"When there may be significant difference in backgrounds between different areas, a Kruskal-Wallis

test.. .can be used to determine whether there are, in fact, significant differences in mean background

concentrations among potential reference areas." Based on the agreement between the mean of both

reference areas, it is not necessary to conduct a Kruskal-Wallis test on the reference area data, because

there is no significant variability between the two reference areas that have been sampled. The

established background value was 1.1 pCi/g Th-232.

14.7 Area Classifications

All of the areas have undergone either a characterization study or historical site assessment that is used as

the basis for the initial determination of the area classification established in this section. The former

Freshwater Pond area currently is not impacted. However, DPs call for use of this area (after closure) as a

material processing area. Therefore, all areas in the Pond Parcel with the exception of the clean backfill

cover have been designated as impacted for purposes of classification and survey. In addition, gamma

surveys will be performed in areas adjacent to the dross pond to confirm that elevated gamma levels

measured during the ALRP were due to gamma contribution from the pond.

(Rev. 9/05)

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Definitions

Class Definition Survey Unit SizeI Areas known or expected to have Up to 2,000 in

Land Areas radionuclide concentrations abovethe DCGLw

2 Areas known or expected to have 2,000 to 10,000 mn2

Land Areas radionuclide concentrations abovenormal background concentrationsbut that are not expected to beabove the DCGLw

3 Areas that are not expected to have No limitLand Areas radionuclide concentrations

detectable above normalbackground concentrations

I Areas known or expected to have Up to 100 m2Structural radionuclide concentrations above of floor areaSurfaces the DCGLw

2 Areas known or expected to have 100 to 1,000 m2Structural radionuclide concentrations aboveSurfaces normal background concentrations

but that are not expected to beabove the DCGL w

3 Areas that are not expected to have No limitStructural radionuclide concentrationsSurfaces detectable above normal

background concentrations

NUREG-1575, MARSSIM, recommends a maximum Class 1 survey unit area of 2,000 m to ensureeach survey unit is assigned an adequate number of sample points. For areas larger than 2.000 m2 withuniform conditions, initial classification and exposure pathway modeling assumptions, the survey unitarea may be increased providing the data quality objectives, specifically the sample point density ismaintained. If it is determined during site remedial operations that site conditions warrant a surveyunit to be greater than 2,000 m2 in size, Kaiser will design the survey to comply with the data qualityobjectives of MARSSIM.

(Sept. 2005 Revision)

(Rev. 9/05)

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Initial Area Classifications

Area Description ClassificationProcessing Area currently occupied by a Freshwater I

Area Pond which will be used for(Fresh Water processing/stockpiling excavated

Pond) materials (=9 survey units).Former Area formerly occupied by the dross

Retention Pond Retention Pond and Reserve Pond, postArea Bottom excavation of dross (=21 survey units).

Former Area formerly occupied by the drossRetention Pond Retention Pond and Reserve Pond,

Area backfilled with below-criteria material in2-foot survey lifts (=21 survey units perlift).

Former The triangular parcel of land north ofOperational 41st Street and south of the Union

Area Pacific Railroad right-of-way in whichplant processes and operations occurred.

Spillway/Other Structures (such as the spillway) locatedPermanent where thoriated material is known toStructures exist. The total area of these structures

cannot be determined until uncovered byexcavation.

14.7.1 Process for Reassinmnent of Area Classifications

All areas will not have the same potential for residual contamination and, accordingly, will not need the

same level of survey coverage to achieve the established release criteria. The initial area classifications

are based on a combination of characterization data and historical information. Additional information

obtained during the remediation process may lead to the determination that the initial classifications

established should be revised to be consistent with the definitions given.

14.7.2 Classification Upgrades

Any area classification may be upgraded (e.g., from Class 2 to Class 1) by the Data Manager based on the

receipt of additional survey or measurement information that justifies the need for such action.

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14.7.3 Classification Downgrades

Any area classification may be downgraded (e.g., from Class 1 to Class 2) by the Data Manager based on

the receipt of additional survey or measurement information that justifies the lower classification pro-

vided that the approval of the Kaiser RSO and the NRC is obtained.

14.7.4 Documentation of Classification Changes

All changes to the initial area classifications will be documented and included in the final soil remediation

documentation.

14.8 Selection of Survey Units

Each impacted area will be divided into a number of survey units based on the classification defined

above. Selection of the survey units will be based on areas having similar operational history or similar

potential for residual radioactivity to the extent practical. Survey units also will have relatively compact

shapes unless an unusual shape is appropriate for the site operational history or site conditions.

14.9 Field Instrumentation

The gamma-emitting progeny of the surrogate radionuclide Th-232 emit high-energy photons and are

easily detected using survey instruments equipped with Nal scintillation crystal detectors. Scanning for

gross gamma activity will be used to guide remediation activities and as part of the final status survey

when remediation is complete. The following survey instruments (or equivalents) as appropriate will be

used to scan soil:

Manufacturer and Manufacturer andMeter Detector Model Detector Type Use

Ludlum 2221 Ludlum 44-10 Sodium Iodide Scans for Gamma-2"-x-2" NaI scintillator (unshielded) Emitting Radionuclides

Use of these field instruments or acceptable equivalents are evaluated against the goal of achieving MDCs

of less than 75 percent of the DCGLw for direct measurements and/or scanning measurements. MDCs

were calculated for scanning instruments using the method provided in MARSSIM for calculating MDCs

that control both Type I and Type HI errors (i.e., elimination of false negatives and false positives) as

follows:

(Rev. 9/05)

14-17

Scan MDCRsureyor - MDCR

Where MDCR is the minimum detectable count rate in counts per minute (cpm), E i is the instrument effi-

ciency (cprn/pR/hour), and p is the surveyor efficiency. The value of p has been estimated to be between

0.5 and 0.75. The value of 0.5 is conservative. In addition:

MDCR = six (60/i)

si = d'Fb-i

where si is the minimal number of net source counts required for a specified level of performance for the

interval i, in seconds; d' is the value selected from MARSSIM Table 6.5 based on the required true

positive and false positive rates; and bi is the number of background counts in the intervali. The value of

d' used to calculate the detector sensitivity values is 1.38, corresponding to an alpha of 0.05 and beta of

0.40. This value of d' will result in less than 5 percent false negatives and about 40 percent false

positives. Typical scan MDCs using the MARSSIM two stage scan methodology for survey instruments

equipped with 2-inch-by-2-inch Nal detectors are summarized in Table 14-7 for increasing background

count rates. Static and scan MDCs for surface contamination detectors are presented in Chapter 14.0 and

Appendix D of the May 2002 DPA.

For surface contamination scanning and static measurements, the radionuclides of concern and/or their

progeny emit alpha and/or beta particles that are easily detected using survey instruments equipped with

gas proportional detectors and scalers. Scanning for gross alpha or gross beta activity will be used as part

of status surveys of structural surface survey units to ensure elevated areas of activity are not missed. In

addition, static counts of structural surfaces at predetermined sample points are used to assess total

contamination of structural surfaces. The following survey instruments (or equivalents) will be used to

scan structural surfaces:

(Rev. 9/05)

14-18

Manufacturer and Manufacturer andMeter Detector Model Detector Type Use

Ludlum 43-89 Dual Scans and Static CountsLudlum 2224 Phosphor Alpha/Beta Zinc Sulfide Scintillator for Alpha and Beta

Detector Emitting Radionuclides

Ludlum 43-68 Scans and Static CountsLudlum 2221 Gas Proportional Gas Proportional for Alpha and Beta

Emitting Radionuclides

Use of these field instruments or acceptable equivalents are evaluated against the goal of achieving MDCs

of less than the DCGLs for direct measurements and/or scanning measurements. MDCs will be

calculated for scanning instruments using the method provided in MARSSIM for calculating MDC that

controls both Type I and Type II errors (i.e., elimination of false negatives and false positives) as follows:

Alpha Scan

There are two equations based on the MARSSIM two-stage scan methodology used to determine the

alpha scanning MDC depending on the background level. For a typical alpha background level of less

than 3 cpm, the probability of detecting a single count while passing over the contaminated area is:

-GCd

P(n>l)=l-e 60v

where:

P(n > 1) = probability of observing a single count,G = activity (dpm),E = 41 detector efficiency (cpd),d = width of detector in direction of scan (cm), andv = scan speed (cm/s).

Increase the value of G until the corresponding probability equals the desired confidence level, e.g., 95

percent. For a background level of 3 cpm to about 10 cpm, the probability of detecting two or more

counts while passing over the contaminated area is:

((GE+B~w (GE+B)dP(nŽ_2)= 1- 1 + Bd6 e 60°v

where:

P(n _2) = probability of observing two or more counts,G = activity (dpm),E = 4n detector efficiency (cpd),B = background count rate (cpm),d = width of detector in direction of scan (cm), and

(Rev. 9/05)

14-19

v = scan speed (crn/s).

Increase the value of G until the corresponding probability equals the desired confidence level, e.g., 95

percent.

Beta Scan

Based on the MARSSIM two-stage scan methodology, the beta scanning MDC at a 95 percent confidence

level is calculated using the following equation which is a combination of MARSSIM Equations 6-8, 6-9,

and 6-10:

MDCscan -

101 100cm 2

where:

MDC,,n = MDC level in dpm/100 cm2,d' = desired performance variable (usually 1.38 corresponding to alpha and beta errors

of 0.05),bi = background counts during the residence interval,i = residence interval in seconds,p = surveyor efficiency (0.5 - 0.75, 0.5 is conservative),A = detector probe physical (active) area in cm2, andF-.tt = total detector efficiency for radionuclide emission of

=x ixE,where:

Ei = 2n instrument efficiency in counts per disintegration (cpd) andE, = source (or surface contamination) efficiency.

Note: Es values can be determined or the default values provided in NUREG-1507 can be used as

follows: 0.25 for all alpha energies and beta maximum energies between 0.15 and 0.4 MeV, 0.5 for all

beta maximum energies greater than 0.4 MeV.

Alpha or Beta Static Counts

Minimum counting times for static counts of total and removable contamination will be chosen to provide

a MDC that is a fraction (25 - 75 percent) of the survey unit-specific acceptance criteria. MARSSIM

equations have been modified to convert to units of dpm/100 cm2. Count times are determined using the

following equation. Static counting MDCs at a 95 percent confidence level are calculated using the

following equation which is an expansion of NUREG-l1507, Equation 6-7 (Strom & Stansbury, 1992):

(Rev. 9/05)

14-20

l~ts3+3.29 Bt -t (1+ L)

MD C, Fa7A tbs

t,.~ ,"10--

where:

inCstati, = minimum detectable concentration level in dpm/1 00 cm2,BR = background count rate in counts per minute,tB = background count time in minutes,ts = sample count time in minutes,A = detector probe physical (active) area in cm2, andEtot = total detector efficiency for radionuclide emission of

= EixF-l,where:

Fi = 2n instrument efficiency in counts per disintegration (cpd) and= source (or surface contamination) efficiency.

Note: Es values can be determined or the default values provided in NUREG-1507 can be used as

follows: 0.25 for all alpha energies and beta maximum energies between 0.15 and 0.4 MeV, 0.5 for all

beta maximum energies greater than 0.4 MeV.

14.10 Laboratory Analysis

With the exception of radiation badge service, laboratory analytical services are expected to be provided

by Outreach of Broken Arrow, Oklahoma. In the event that Outreach is not available, Kaiser will select

another qualified analytical laboratory.

Soil samples will be analyzed by gamma spectroscopy. The MDC value required for each gamma spec-

troscopy analysis is 25 percent of the release criteria for Th-232. Characterization survey results confirm

that Th-232 is in secular equilibrium with its short-lived progeny Ac-228 and Th-228. Th-232 activity

will be identified based on the Ac-228 activity (primary gamma energy of 911.1 keV). The Th-228

activity will be calculated by multiplying the Th-232 activity by 1. The Th-230 activity will be calculated

by multiplying the Th-232 activity by 3.5.

A minimum of five of the QC samples taken as part of the final status survey will also be analyzed by

alpha spectroscopy for Th-232, Th-230, and Th-228. The data will be used to confirm the activity ratio of

Th-232 to Th-230 of 1:3.5. The required MDC for the alpha spectroscopy analysis will be 0.5 pCi/g.

(Rev. 9/05)

14-21

14.11 Sampling and Measurement Technique

A combination of the following techniques may be used to achieve the desired survey requirements for an

area.

14.11.1 Surface Scans

Depending on the area classification (Class 1, Class 2, or Class 3), scanning coverage will range in accor-

dance with Table 14-8, Section 14.4.2.3. When scanning soil, the detector is held close to the ground (1

to 2 inches) and moved in a serpentine pattern. A scan rate of 0.5 m per second will be used. In the scan-

ning mode, the audio response will be used to prevent lack of detection of an elevated area due to meter

response time. The "two-stage" scan methodology will be utilized.

14.11.2 On Site Gamma Spectrometry

An on-site gamma-ray spectroscopy system may be utilized to provide qualitative and quantitative

analysis of the Th-232 content in waste samples and final status survey screening samples.

14.11.3 Soil Sampling

14.11.3.1 Surface Sampling

Surface soil sampling will be conducted to evaluate the average remaining activity concentration of

excavation bottom survey units prior to backfill activity. Surface samples will be collected from the top

15 cm (6 inches) of soil that correspond to the soil mixing or plow depth in several environmental

pathway models. Grass, rocks, sticks, and foreign objects will be removed from the soil samples to the

degree practical at the time of sampling. If there is reason to believe these materials contain activity, they

will be retained as separate samples.

14.11.3.2 Core Sampling

Core samples will be collected after backfilling of below-release criteria material is complete. For

purposes of a final status survey, the entire backfilled retention pond area will be considered as a unit and

divided into survey units based on m2, i.e., Class 1 survey units of less than 2,000 mn2. A random start,

triangular grid pattern will be used to take the required number of samples (N/2) in each survey unit. The

sample will consist of a core sample through the approximate 3-meter layer of placed material. The entire

core will be scanned using a 2-inch-by-2-inch NaI detector in a low background area sufficient to achieve

a scan-MDC of less than 3 pCi/g Th-232. The 3 meters will be subdivided into three consecutive 1-meter

segments in accordance with Appendix E of the NMSS Decommissioning Standard Review Plan. Each

(Rev. 9/05)

14-22

1-meter segment will be mixed and containerized. All three segments will be analyzed by gamma

spectroscopy for Th-232. The MDC required will be 3 pCi/g.

14.12 Final Status Survey Implementation

The final status survey will be used to select/verify survey unit classification and to demonstrate that the

objectives have been achieved. Two situations that require final status surveys are detailed in this section.

*The first involves the final status survey of remediated areas (e.g., the Retention/Reserve Pond Area), and

the second involves the final status survey of the processing area. The surveys will be performed using

gamma-sensitive instrumentation and analytical analyses described above.

14.12.1 Postremediation Surveys

The final status survey units will be defined and marked. When remediation activities in a survey unit are

completed, the following will be performed.

14.12.1.1 Gamma Scans

A gamma scan as defined by classification will be performed in accordance with the area classification.

For the Retention Pond area, each 2-foot-thick lift that is placed in an excavation will receive a 100

percent scan to ensure that there are no areas that exceed the elevated measurement comparison.

14.12.1.2 Grids

The sample grid and starting location will be established.

14.12.1.3 Sample Number

The required number of samples will be taken and analyzed as described above.

14.12.1.4 Data Evaluation

The data will be evaluated as described below.

14.12.2 Postremediation Surveys for Returned Overburden Material

When remediation activities in a survey unit that required the excavation of substantial overburden soil

are completed, the following will be performed:

(Rev. 9/05)

14-23

" The bottom of the excavation will be surveyed as detailed in 14.12.1.1 above.

* The sample grid and starting location will be established,

* The number of surface samples required will be taken and analyzed.

" A 2-foot layer of acceptable (below 31.1 pCi/g) backfill material will be placed in theexcavation.

" A gamma scan as defined by classification will be performed.

" The sequence of 2-foot layers of acceptable backfill and subsequent survey will be repeatedas necessary to fill excavation (prior to placement of off-site backfill).

Once the excavation is filled with below-criteria material:

" the sample grid and starting location will be established," the number of core samples required will be taken and analyzed, and" the data will be evaluated as described below.

14.13 Data Evaluation

Data will be reviewed by the Data Manager to ensure that the requirements are implemented as prescribed

and that the results of the data collection activities support the objectives of the survey, or permit a deter-

rmination that these objectives should be modified.

14.13.1 Preliminary Data Review

The Data Manager will review QA and QC reports, prepare graphs of the data, and calculate basic statis-

tical quantities to analyze the structure of the data and identify patterns, relationships, or potential anoma-

lies. The survey data shall be reviewed as it is collected. The preliminary data examination includes the

following:

* Evaluation of data completeness.

* Verification of instrument calibration.

* Verification of sample identification and traceability back to sampling location.

* Measurement of precision using duplicates, replicates, or split samples.

* Measurement of bias using reference materials or spikes examination of blanks forcontamination.

(Rev. 9/05)

14-24

" Assessment of adherence to method specifications and QC limits.

* Evaluation of method performance in the sample matrix.

" Applicability and validation of analytical procedures for site-specific measurements.

* Assessment of external QC measurement results and QA assessments, including the resultsof analytical laboratory QA/QC reports related to the analysis of final status surveysamples.

14.13.2 Data Evaluation and Conversion

For comparison of survey data to DCGLws or DCCLs, the survey data from field and laboratory

measurements will be converted to DCGLw or DCCL units. The Data Manager will ensure data

measurements retain traceability to NIST and conversion factors are appropriate for the radiation quantity.

The preliminary data reports will be reviewed to ensure adequate measurement sensitivity is being

achieved and to resolve any detector sensitivity problems. Analytical reports will be reviewed for proper

MDC values. The results of analytical results will be reported whether the result is above or below the

reported MDC value so that the MDC value is not used in the data assessment. Preliminary scan data will

also be reviewed against the percent coverage requirement of the survey unit.

An evaluation will be made to determine that the data are consistent with the underlying assumptions

made for survey plan statistical procedures. The basic statistical quantities that will be calculated for the

survey unit are the following:

" Mean* Standard deviation* Median* Minimum* Maximum

The parameter of interest is the mean concentration in the survey unit. The two-sample statistical test

(WRS Test) will be used. The two-sample WRS Test will evaluate whether the median of the data is

above or below the DCGLw or DCCL.

(Rev. 9/05)

14-25

Summary of Statistical Tests

Survey Result ConclusionDifference between maximum survey unit measurement and Survey unit meets release criterionminimum reference area measurements is less thanDCGLw/DCCLDifference of survey unit average and reference area average Survey unit does not meet releaseis greater than DCGLw/DCCL criterionDifference between any survey unit measurement and any Conduct WRS Test and elevatedreference area measurement greater than DCGLw/DCCL and measurement comparisonthe difference of survey unit average and reference areaaverage is less than DCGLw/ DCCL

The null hypothesis is assumed to be true unless the WRS test indicates that it should be rejected in favor

of the alternative. The result of the hypothesis test determines whether or not the survey unit as a whole

is deemed to meet the release criterion. The WRS test will be applied as outlined in the following steps.

1. Adjusted reference area measurements will be obtained by adding the DCGLw or DCCL to eachreference area measurement.

2. The m adjusted reference area sample measurements and the n sample measurements from thesurvey unit will be pooled and ranked in order of increasing size from I to N, where N = m + n.

3. If measurements are tied in rank, each of the tied values will be assigned the same average rank

of that group of tied measurements.

4. The ranks from the reference area will be summed as W,.

5. The value of W, will be compared with the critical value given in MARSSIM Table 1.4 for theappropriate values of m and n at the required Type I error decision rate (aX = 0.05). If W, isgreater than the critical value, the null hypothesis that the survey unit exceeds the release criterionwas rejected.

Both the measurements at discrete locations and the scans will be used to identify elevated areas within a

survey unit. Analytical results of soil samples will be used to complete the elevated measurement

comparison. If residual radioactivity is found in a localized area of elevated activity - in addition to the

residual radioactivity distributed relatively uniformly across the survey unit - the unity rule discussed

above will be used to ensure that the release criterion has been met as follows:

8 +n (•c-•_ <1DCGL + IDCGLrmc

where:8 = is the average concentration of Th-232 over the entire survey unit5Mc = the average concentration of Th-232 over the elevated area x within the survey unitDCGL = the DCGLI or DCCL for Th-232

(Rev. 9/05)

14-26

DCGLEMC = (area factor for elevated area x) X (DCGL)x = refers to one of the elevated areas within the survey unitn = the total number of elevated areas within the survey unit

If there is more than one elevated area, a separate term will be included for each area. The result of the

EMC will be used as a trigger for further investigation. The investigation may involve taking further

measurements to determine that the area and level of the elevated residual radioactivity are such that the

resulting dose or risk meets the release criterion. The investigation will provide adequate assurance,

using the DQO process, that there are no other undiscovered areas of elevated residual radioactivity in the

survey unit that might otherwise result in a dose or risk exceeding the release criterion. In some cases,

this may lead to reclassifying a survey unit--unless the results of the investigation indicate that

reclassification is not necessary.

14.13.3 Investigation Levels

The Data Manager will use radionuclide-specific investigation levels to indicate when additional investi-

gations may be necessary. Investigation levels will also serve as a QC check to determine when a

measurement process begins to get out of control. A measurement that exceeds the investigation level

may indicate that the survey unit has been improperly classified or it may indicate a failing instrument.

When an investigation level is exceeded, the first step will be to confinn that the initial measure-

ment/sample actually exceeds the particular investigation level. This may involve taking further meas-

urements to determine that the area and level of the elevated residual radioactivity are such that the

resulting dose or risk meets the release criterion. Depending on the results of the investigation actions,

the survey unit may require reclassification, remediation, and/or resurvey. The following table lists the

investigation levels which will be used by the Data Manager.

Postremediation Survey Investigation Levels

Flag ScanningSurvey Unit Flag Direct Measurement or Measurement Result

Classification Sample Result When: When:Class 1 >DCGLmc / DCCL or >DCGLmc

> DCGLw / DCCL and orthe mean of the survey >DCCLunit is greater than 0.75of the DCGLw / DCCL

Class 2 > DCGLw > DCGLw or>MDC

Class 3 > 0.5 of the DCGLw+ > DCGLw orbackground >MDC

(Rev. 9/05)

14-27

If the data suggest that the survey unit was misclassified, the original DQOs will be redeveloped for the

correct classification. The sampling design and data collection documentation will be reviewed for con-

sistency with the DQOs.

14.14 Final Status Survey Report

A report will be prepared to document the final conditions of the site. The report will include information

concerning the following:

* An overview of the results of the survey.

" A discussion of any changes that were made in the survey from what was proposed in theSoil Remediation Plan.

* A description of the method by which the number of samples was determined for each sur-vey unit.

* A summary of the values used to determine the number of samples and justification forthese values.

The survey results for each survey unit including the following:

The number of samples taken for the survey unit.

A map or drawing of the survey unit showing the reference system and random-start sys-tematic sample locations.

I The measured sample concentrations.

* The statistical evaluation of measured concentrations.

* Judgmental and miscellaneous sample data sets reported separately from those samplescollected for performing the statistical evaluation.

A discussion of anomalous data including any areas of elevated direct radiation detectedduring scanning that exceeded the investigation level or measurement locations in excess ofthe DCGLw or DCCL.

A statement that a given survey unit satisfied the DCGLw or DCCL and the elevatedmeasurement comparison, if any sample points exceeded the DCGLw or DCCL.

A description of any changes in initial survey unit assumptions relative to the extent of

residual radioactivity.

A discussion of a survey unit reclassification including applicable data.

(Rev. 9/05)

14-28

References

1. ADA Consultants, Inc., April 1, 1994, Radiological Survey Report, Kaiser Aluminum & ChemicalCorporation, Tulsa, Oklahoma.

2. Advanced Recovery Systems, 1995, Volume II, Plate 1, Field Characterization Report, Appendix F.

3. Advanced Recovery Systems/Nuclear Fuel Services, Inc., April 25, 1995, Kaiser Aluminum SpecialtyProducts, Field Characterization Report, Tulsa, Oklahoma.

4. Earth Sciences Consultants, Inc., February 2002, Final Status Survey Report, Adjacent Land Area,Tulsa, Oklahoma Facility.

5. Earth Sciences Consultants, Inc., May 2002, Revised May 2003, Decommissioning Plan Addendum,Tulsa Facility, Tulsa, Oklahoma, Kaiser Aluminum & Chemical Corporation, Baton Rouge,Louisiana.

6. Kaiser, August 1998, Adjacent Land Remediation Plan for Kaiser Aluminum & ChemicalCorporation, Tulsa, Oklahoma.

7. NMSS Decommissioning Standard Review Plan Appendix E - Rev 0, September 2000,Implementing the MARSSIM Approach for Conducting Final Radiological Survey.

8. Nuclear Regulatory Commission, July 1998, Draft NUREG-1549: Decision Methods for DoseAssessment to Comply with Radiological Criteria for License Termination.

9. NUREG-1507, December 1997, Minimum Detectable Concentrations with Typical Radiation SurveyInstruments for Various Contaminants and Field Conditions.

10. NUREG/CR-1575, August 2000, MARSSIM, Rev. 1

Q:\P4000\PA4072\Dccommissioning Plan\DP chaptcrl4 1-25-06.doc

(Rev. 9/05)

APPENDIX C

WILCOXON RANK SUM TEST

APPENDIX CEvaluation of Survey Unit Analytical Results

Wilcoxon Rank Sum TestThorium Remediation Project


In-accordance with the DP, final status survey activities included systematic gridsampling to determine the average radionuclide concentration in a survey unit and grossgamma scans to screen for elevated areas. At least the minimum number of samplesrequired (N) was taken in each survey unit. Since the radionuclides of interest occurnaturally in background, the minimum number of samples (N) from a survey unit and anappropriate reference background area.was used to complete the Wilcoxon Rank Sum.(WRS) Test.

Note: When the, WRS Test is used, the minimum number of samples required in thesurvey unit and in the reference area is referred to as N/2 in MARSSIM so that the totalnumber of samples required to complete the WRS test is N.

PROCEDURE

After N systematic samples have been taken within the survey unit, an equal. number ofsamples results is randomly selected from the appropriate reference area data base. Therandom number function in Microsoft Excel is used to select the appropriate number ofsamples. The reference area databases are included in Appendix C as follows:

.1. Appendix C, Table 1. Soil Reference Area Sample Results- The soil sample Th-232 activity concentration results (pCi/g) are from two sets of 30 core samplestaken prior to the onset of decommissioning activities onsite. The first set of 30cores was taken in a non-impacted area of the site. The second set of 30 coreswas taken approximately one mile offsite. Each 6-inch segment of each core was

. .analyzed for .Th-232. There is no significant vaiiability between the two sets ofresults. A discussion of the results and the data can be found in Chapter 14 andAppendix F of the DP.

2. Appendix C, Table 2. Concrete Structural Surface Reference Area Total AlphaContamination Results - The total alpha contamination results (dpni/1.00cm 2)from the concrete floor of the Flux Building (Survey Unit FB-001) final surveywere used as the concrete structural surface reference area. The results of theFlux Building survey were indistinguishable from background in accordance withthe State of Oklahoma's criteria for allowing the concrete to be disposed of offsitein the State of Oklahoma.

Q:\P40WJPAk407ZM'S Yq~UVpait~p CZWS TatdocC- C-1

3. Appendix C. Table 3. Cinderblock Structural Surface Reference Area Total AlphaContamination Results - The total alpha contamination results (dpmf100cm2 )from the cinderblock wall of Flux Building (Survey Unit FB-001) final survey-were used as the cinderblock structural surface reference area. The results of theFlux Building survey were indistinguishable from background in accordance withthe State of Oklahoma's criteria for allowing the cinderblock to be disposed ofoffsite in the State of Oklahoma.

Once the reference area results are selected, the survey unit and reference area results arethen complied in a table with the average, standard deviation, minimum, maximum, andmedian values for both sets of data being calculated. The results are evaluated using thefollowing table.

Survey Result ConclusionIf the difference between the maximum survey unit The survey unit meets releasesample result and the minimum reference area sample criterion.result is less than the appropriate release criteria(DCGLw/DCCLADCGL-GA) then:If the difference of the survey unit sample results The survey unit does not meetaverage and the reference area sample results average is release criterion.greater than the appropriate release criteria (DCGLw/DCCI.DCGL-GA), then:.If the difference between any survey unit sample result Conduct the Wilcoxon Rank Sumand any reference area sample result is greater than the Test and Elevated Measurementappropriate release criteria (DCGLw/DCCI.DCGL.- Comparison (EMC) if necessary, toGA), and the difference of the survey unit average and determine if the unit meets releasereference area average is less than the appropriate criterion.release criteria, then:

The null hypothesis (the survey unit exceeds the release criteria) is assumed to be trueunless the WRS Test indicates that it should be rejected in favor of the alternative. Theresult of the hypothesis test determines whether or not the survey unit as a whole isdeemed to meet the release criterion. The WRS Test is applied as outlined in thefollowing steps.

1. Adjusted reference area measurements are obtained by adding the appropriaterelease criteria (DCGLw /DCCJJDCGL-GA) to each reference area measurement.

2. The m adjusted reference area sample measurements and the n sample measurementsfrom the survey unit are pooled and ranked in order of increasing size from 1 to N,where N = m + n.

3. If measurements are tied in rank, each of the tied values is assigned the.same averagerank of that group of tied measurements.

4. The ranks from the reference area are summed as W,.

QV4000QPA40721SS R A ixcndiz .W•S T"esdoc C-2

5. The value of Wr is compared with the critical value given in MARSSIM Table 1.4for the appropriate values of m and n at the required Type I error decision rate(a = 0.05). (If the values of m and n exceed 20, the &'itical value is calculated usingthe formulas 1.1 and/or 1.2 of MARSSIM Appendix I.) If Wr is greater than thecritical value, the null hypothesis that the survey unit exceeds the release criterion isrejected.

A copy of MARSSIM Table I-4 and MARSSIM Appendix I formulas 1.1 and 1.2 isincluded as part of this appendix.

QP4OQO.PA4O7'SS Rqw&Appmpux M~RS TastdocC- C-3

APPENDIX CTable 1 - Soil Reference Area Sample Results

Reference Core Core Below Th-232Group Location(") LengthlP Surface (pCvg)

Sample.No. Depth

1 1 46" 0"-6" 0.982 2 36" 0" -6" 0.803 3" 40" 0"1-6" 0.354 4 37" 0" -6" 0.615 5 43" 0" - 6" 0.906 6 39" 0"- 6" 0.957 7 40" 0" - 6" 0.708 8 41" 0"- 6" 1.249 9 38" 0"-6" 0.8610 10 37" 0" - 6f .0.5711 11 41" 0"-6" 0.9712 12 39" 0" - 6" 0.9613 13 42" 0"-6" 1.3114 14 46" 0" - 6" 1.1315 15 36" 0" - 6" 1.1116 16 34" O" - 6" 0.5317 17 38" 0" - 6" 0.9118 18 38" 0" - 6" 0.6019 19 40" 0" - 6" 0.3620 20 41" 0"'- 6" 1.3821 21 39" 0" - 6" 1.2522 22 40" 0" - 6" 1.0723 23 46" 0" - 6" 1.0824 24 33". 0" - 6" 0.8525 25 46" 0" - 6" 0.5626 26 42" 0" - 6" 1.4727 27 42" 0" - 6" 1.2428 28 44" 0" - 6" 1.1829 29 39" 0" - 6" 0.9030 30 41" 0" -6" 1.2531 31 42" 0"1-6" 1.3332 32 46" 0" - 6". 1.3633 33 46" 0" - 6" 0.9234 34 46" 0" - 6" 1.1235 35 42" 0" - 6" 1.07.36 36 38" 0" -.6" 0.4137 37 46"1 0" - 6" 0.86

OW.4000%PA4072•SS Reposkppend•xCkTaeosTae1aePage I of 17


Reference Core Core Below Th-232Group Location6i) Length(2) Surface (pCi/g)

Sample No. Depth

38 38 39" 0" - 6" 1.0239 39. 46" .0" - 6" 0.7040 40 46" 0" - 6" 1.1341 41 41" 0".-.6" 0.9242 42 33". 0" - 6" 0.9043 43 46" 0"-6" 0.9644 44 34" 0"-6" 1.2945 45 46" 0" - 6" 1.23.46 46 36" 0" - 6" 0.5847 47 .39" 0" - 6" 0.63

.48 48 40" 0" - 6" 1.1049 49 28" 0" - 6" 0.9950 50 26". 0"- 6" 0.9751 51 46" 0" -6" 61.7252 52 46" 0"- 6" 1.6353 53 46" 0" - 6" 1.2954 54 46" O" - 6" 1.2455 55 46" 0" - 6" 1.3156- 56 46" 0"-6" 1.1757 57 46" 0" - 6" 0.9658 58 46" 0".- 6" 1.0459 59 46" 0"-6" 0.9660 60 46". 0" - 6" 1.0061 1 46" 6" - 12" 0.9262 2 36" 6" - 12" 1.3463 3 40" 6" - 12" 0.6664 4 37" 6"- 12" 1.0665 5 43" 6" - 12" 0.9466 6 39" 6" - 12" 0.8467 7 40" 6"- 12" 1.1868 8 41" 6" - 12" 1.3369 9 38" 6"- 12" 0.8270 10 37". 6"- 12" 0.4771 11 41" 6" -.12" 1.0772 12 39" 6"- 12" 1.2173. 13 42" 6"- 12" 1.09.74 14 46" 6" -12" • 0.87

.-P40PPA4072TFSS ReppleVno"ix CT\Tabee1g Page 2 of 17


Reference Core Core Below Th-232Group. Location(') Length(2) Surface (pCi/g)

Sample No. Depth

75 15 36" 6" - 12" 1.2776 16 34" 6" - 12" 0.9777 17 38" 6" -.12" 0.8078 18 38" 6"- 12" 1.0479 19 40" -6" - 12" 0.5780 20 41" 6" - 12" 1.2581 21 39" 6"- 12" 1.2582 22 40" 6" - 12" 1.4383 23 46" 6" - 12" 1.2284 24 33" 6" - 12" 0.7985 25 46" 6"- 12" 1.18

.86 26 42" 6" - 12" 0.8887- 27 42" 6" - 12" 0.98

.88 " 28 .44" 6"- 12" 1.4689 29 39" 6" - 12" 0.8790. 30 41" 6" - 12" 1.3791 31 42" 6" - 12" 0.9792 32 46" 6" - 12" 1.3793 33. 46" "6" - 12" 0.67.94 34 46" 6" - 12" 1.1795 35 42" 6" - 12" 0.8996 36 38" . 6"- 12" 0.5797 37 46" 6" - 12" 1.0998 38 39" 6"- 12" 1.3999 39 46" 6" - 12" 1.37100 40 46" 6"- 12" 1.01101 41 41" 6" - 12" 0.91102 42 33" 6" - 12" 1.04103 43 46" 6" - 12" 1.12104 44 34" 6" - 12" 1.45105 45 46"" 6" - 12" 0.95106 46 36" 6" - 12" . 0.98107 47 39" 6" - 12" 1.00108 48 40" 6"- 12" 1.01109 49 28" 6"'- 12" 1.27110 50 26" 6" - 12" 1.26111 51 46" 66" -12" 1.16

OQ:N4O0WA4O72\-FSS RepodftApend(x CTablesffabae 3Page 3 of 17

APPENDIX CTable I - Soil Reference Area Sample Results

Reference Core Core Below Th-232Group Location(" Length(2) Surface (pCVg)

Sample No. Depth112 52 46" 61-12" 1.50113 53 46" 6"- 12" 1.28114 54 46" 6" - 12" 0.82115 55 46" 6" - 12" 1.29116 56 46" 6"- 12" 0.65117 57 46" 6" - 12" 1.10118 58 46" 6" - 12" 1.20119 59 46" 6" - 12" 1.32120 60 46" 6"- 12" !.08121 1 46" 12"*- .18" 1.47122 2 36" 12" - 18" 1.24123 3 40" 12" - 18" 0.57124 4 37" 12" - 18" 1.07125 5 43" 12",- 18" 0.81126 6 39" 12"- 18" 1.29127 7 40" 12"- 18" 1.26128 8 41" 12"- 18" 1.07129 9 38" 12" - 18" 0.93130 10 37" 12" - 18" 0.94131 11 41" 12" - 18" 1.26132 12 39" 12" - 18" 1.48133 13 42" 12" - 18" 1.43134 14 46" 12" - 18" 0.75135 "15 36" 12" - 18" 0.99136 16 34" 12" - 18" 1.25137 17 38" 12" - 18" 1.22138 18 38" 12"-18" 0.86139 19 40" 12" - 18"1 0.70140 20 41" 12"- 18" 1.42141 21 39" 12" - 18" 0.97142 22 40" 12"-18" 1.36143 23 46" 12" - 18" 1.03144 24 33" 12" - 18" 1.28145 25 .46" 12" - 18" 0.86146 26 42" 12"-18" 1.23147 27 42" 12"- 18" 1.06148 28 44" 12" - 18" 1.37

O.V4O00PA4072MSFS Repods'VApVeroU CATables\Tablee Page 4 of 17

AIPENDIX CTable 1 - Soil Reference Area Sample Results

Reference Core Core Below Th-232Group Location(") Lengtphz) Surface (pCVg)

Sample No. Depth

149 29 39," 12"- 18" 0.98150 30 41" 12"- 18" 1.50151 .31 42" 12" - 18" 1.52152 32 46" 12"- 18" 1.27153 33 46" 12"- 18" 0.85154 34 46" 12" - 18" 1.06155 35 42" 12"- 18" 1.04156 36 38" 12"- 18" 0.96157 37 46" 12"- 18" 0.91158 38 39" 12"- 18." 1.22159 39 46" 12"- 18" 1.46160 40 46" 12" - 18" 1.20161 41 41" 12"- 18" 1.20162 42 33" 12"- 18" 1.00163 43 46" 12" - 18" 1.091"64 "44 34" 12"- 18" 1.88165 45 46" 12"- 18" 0.54166 46 36" 12"- 18" 1.32167 47 39" 12" - 18" 1.45168 48 40" 12" - 18" .1.30169 49 28" 12"- 18" 1.19170 50 26" 12" - 18" 1.20171 51 46" 12"- 18" 1.16172 52 46" 12" - 18" 1.07173. 53 46" 12"- 18"1 0.86174 54 46" 12" - 18"1 0.78175 55 46" 12"- 18" 1.12176 56 46" 12" - 18" 0.92177 57 46" 12"- 18" 0.64178 58 46" 12"- 18" 0.71179 59 46" 12"-18" 1.24180 60 46". 12" .- 18" 0.96181 1 46" 18" - 24" 1.35182 2 36" 18"1-24" 1.16183 3 40" 18" - 24" 0.81184 4 37" 18" -24" 1.08185 5 43" 18" - 24" 0.90

QSP4 MOOMA4072SS Repojdsopendix CMTables\Table PPage 5 of 17


Reference Core Core Below Th-232Group Location(') Length(2) Surface (pCVg)

Sample No. Depth

186 6 39" 18" - 24" 1.36187 7 40" 18" - 24" 1.30188 8 41" 18";- 24" 1.25189 9 38" 18" - 24" 1.03190 10 37" 18" - 24" 0.49191 11 41" 18"-24" 1.47192 12 39" 18" - 24" 1.32193 13 42" 18" - 24" 1.16194 14 46" 18" - 24" 0.89195 15 36" 18" - 24". 1.48196 16 34" 18" - 24" 0.91197 17 38" 18" - 24" 1.52198 18 38" 18" - 24" 0.92199 19 40" 18" - 24" 0.66200 20 41" 18" - 24" 1.41201 21 39" 18" - 24" 1.03202 22 40"1 18" - 24" 1.51203 23 46" 18" - 24" 1.43204 24 33" 18" - 24" 1.35205 25 46" 18" - 24" 1.05206 26 42" 18" - 24" 1.02207 27 42" 18" - 24" 1.56208 28 44" 18" - 24" 0.79209 29 39" 18" - 24" 0.90210 30 41" 18" - 24" 1.22211 31 42" 18" - 24" 1.62212 32 46" 18" - 24" 1.29213 33 46" 18" - 24"1 0.94214 34 46" 18"1-24" 1.45215 35 42" 18" - 24" 1.13216 36 38" 18" - 24" 0.64217 37 46" 18"1-24" 1.28218 38 39" 18" -24" 1.32219 39 46" 18"1-24" 1.01220 40 46" 18" - 24" 0.86

* 221 41 41" 18"1- 24" 1.19222 42 1 33" 18" - 24" 1.19

QOO4M00•A4072SS Repor d~x CTabaesXTable I Page 6 of 17


Reference Core Core Below Th-232Group Location(') Length() Surface (pCilg)

Sample No. Depth

223 43 46" 18" - 24" 1.02224 44 34" 18" - 24" 1.59225 45 46" 18" - 24" 0.73226 46 36" 18" -24" 0.99227 47 39" 18"1- 24" 2.25228 48 40" 18" - 24" 1.62229 49 28" 18" - 24" 1.22230. 50 26" 18" - 24" 1.31231" 51 46" 18" - 24" 1.38232 52 46" 18" - 24" 1.25.233 53 46" , 18"-- 24" 1.20234 54 46" 18" - 24" 0.57235 55 46" 18"- 24" .1418236 56 46" 18" - 24" 1.14237 57 46" 18" - 24" 0.70238 58 46" 18" - 24" 0.60239 59 46" 18" - 24" 1.29240" 60 46" 18" - 24" 1.08241' 1 46" 24"- 30" 1.49242 2 36" 24" -30" 1.01243 3 40" * 24" - 30" 0.77244 4 37" 24" - 30" 1.50245 5 43" 24" - 30" 1.11246 6 39" 24"1-30" 1.46247 7 40" 24" - 30" 1.33248 8 41" 24" - 30" .1.63249 9 38" 24" - 30" 1.27250 10 37" 24" - 30" -1.18251 11 41" 24"1- 30" 1.32252 12 39" 24" -.30" '1.63253 13 42" 24" - 30" 1.27254 141 46" 24" - 30" 1.16255 15 36" 24" - 30" 1.42256 16 • 34" 24" - 30" 1.49257 17 38"' 24" - 30" 1.31258 18 38" 24" - 30" 0.81259 19 40" 24" - 30" 0.60

Q'P400ONPA4072FSS Repo sVppenx CATablesfablel Page 7 of 17


Reference Core Core Below Th-232• Group Location(". Length(2) Surface (pCilg)

Sample No. Depth.260 20 41" 24" - 30" 2.06261 . 21 39" 24" - 30" 1.30262 22 40" 24" - 30" 1.63263. 23 46" 24" - 30" 1.54264 24 33" 24" - 30" 1.41265 25 46" 24" - 30" 1.18266 26 42" 24" - 30" 1.62267 27 42" 24" - 30" 1.37268 28 44" 24" - 30" 2.32269 29 39" 24" -.30" 0.97.270 30 41" 24" - 30" 1.46271 31 42" 24" - 30" 1.49*272 32 46" 24" - 30" 1.43273 33 46" 24" - 30" 0.84274 34 46" 24" - 30" 1.37275 35 42" 24" - 30" 1.25276 36 38" 24" - 30" 0.70277 37' 46" 24" - 30" 1.12278 .38 39" 24" - 30" 125279 39 46" 24" - 30" 1.03280 40 46" 24" - 30" 1.17281 41 41" 24" - 30" 1.39

.282 42 33" 24" - 30" 0.87283 43 46" 24" - 30" 1.18284 44 34" 24" - 30"1 1.20285 45 46" 24" - 30" " 0.64286 46 36" 24" -130" 1.13287 47 39" 24" - 30" 1.02288 48 40" 24" - 30" 1.37289 51 46" 24" - 30" 1.19290 52 46" 24" -.30" 1.31291 " 53 46" 24" - 30" 1.29292 54 46" 24" - 30" 0.93293 55 46' . 24" - 30" 0.89294 56 46" 24" - 30" 0.96295 57 46" 24" - 30" 1.26296 58 46" 24" - 30" • 0.79

QjP40OOXPM072FSS RepxotsWUpendlx CWTableSTaPe I Page 8 of 17

APPENDIX CTable I - Soil Reference Area Sample Results

Reference Core Core Below Th-232Group Location(') Length{e) Surface (pCi/g)

Sample.No. Depth297 59 46" 24" - 30" 0.85298 60 46" 24" - 30" 1.38299 1 46" 30" - 36" 1.24300 2 36" 30" - 36" 0.67301 3 40" 30" - 36" 0.76302 4 37" 30" - 36" 1.16303 5 43" 30" - 36" 0.98304 6 39" 30" - 36" 0.99305 7 40" 30" - 36" 1.50306 8 41" 30"-36" 1.41307 9 38" 30" - 36" 1.02308 10 37" 30" - 36" 0.38309 11 41" 30" - 36" 2.04310 12 39" 30" - 36" 1.42311- 13 42" 30" -36" 1.42312 14 46" .30" -36" 1.26313 15 36" 30" - 36" 0.56314 17 38" 30" - 36" 1.16315 19 40" 30" - 36" 0.84316 20 41" 30" - 36" 1.13317 21 39". 30" - 36" 1.21318 22 40" 30" - 36" 1.47319' 23 46" 30" - 36" 1.31320 25 46" 30" - 36" 0.93321 26 42" 30" - 3.6" 1.03322 27 42" 30" - 36". 1.38323 28 44". 30" - 36" 0.87324 29 39" -30" - 36" 1.12325 30 41" 30" - 36" 1.50326 31 42" 30" -36" 1.72327 32 46" 30" - 36" 1.32328 33 46" 30" - 36" 1.25329 34 46" 30" - 36" 1.21330 35 42" 30" - 36" 1.22331 36 38" 30" - 36" 0.55332 37 46" 30" - 36" 0.95333 38 39" 30" - 36" 0.89

Q.P40OWM0O72TSFS Mporspe CTade\TabePage 9 7Page 9 of 17.


Reference Core Core Below Th-232Group Location(') Length(2) Surface (pCi/g)

Sample No. Depth

334 39 46" 30" - 36" 0.82335 40 46" 30"1-36" 1.11336 41 41" 30" - 36" 1.36337 43 46" 30"1- 36" 1.21338 45 46" 30" - 36" 1.04339 46 36" 30" - 36" 0.46340 47 39" 30" - 36" 1.10341 48 40" 30" - 36" 1.61342 51 46" 30" - 36" 1.26343 52 46" 30" - 36" .1.14344 53 .46" 30" - 36" 1.61345 54 46" 30" - 36" 0.86346 55 46" 30" - 36" 0.84347 56 46" 30" - 36" 0.90348 57 46". 30" - 36" 0.87349 58 46" 30" - 36" 0.82350 59 46" 30" - 36" 1.16351 60 46" 30" -36" 1.07352 1 46" 36" - 42" -1.09353 5 43" 36" - 42" 0.79354 13 42" 36" - 42" 0.96355 14 46" 36" - 42" 0.96356' 23 46" 36" - 42" 1.45357 25 46" 36" - 42" 0.94358 26 42" 36" - 42" 0.74359 27 42" 36" - 42" 0.74

.360 28 . 44" 36" - 42" 1.08361 31 42" 36" - 42" 0.47362 32 46" 36" - 42"1 1.18363 33 46" 36" - 42" 0.97364 34 46" 36" - 42" 1.31365 35 42" 36" - 42" 0.74366 37 46" 36" - 42" 0.99.367 39 46" 36" - 42" 1.02368 40 46" 36" - 42" "1.26369 43 46" 36" - 42" 1.21370 45 46" 36" - 42" 0.79

Q.-P400OWA4072FSS RPeodtsVpeodix CWTablesfTableP Page 10 of 17


Reference Core Core Below Th-232Group Location(') LengthO2) Surface (pCiUg)

Sample No. Depth

371 51 46" 36" - 42" 0.84372 52 46" 36" - 42" 1.06373 53 46" 36" - 42" 1.32374 54 46" 36" - 42" 0.95375 55 46" 36" - 42" 0.99376 56 46" 36" - 42" 0.96377 57 46" 36" - 42" 0.99378 58 46" 36" - 42" 0.77379 59 46" 36" - 42" 1.02380 60 46" 36" - 42" 1.20

Average:Stdev.:Minimum:Maximum:Median:Count:

1.100.300.352.321.11380

Notes:t 1)Numbers 1 through 30 taken on-site in an non-impacted area.

* Numbers 31 through 60 taken I mile offsite.%')Length is the actual length of the recovered core from a 4-footincrement.

C:.W•40CPQ72WSS P Pagpeds\ 1 xoCf 1e7Tate1Page 11 of 17 --

APPENDIX CTable 2 -Concrete Structural Surface Reference Area Sample Results

Reference Flux Building Location Grid Total AlphaGroup Sample Survey Unit Contamination

No. (dpmnlOOcm2)1 FB-001 Concrete Floor A3 90.62 B13-001 Concrete Floor A4 53.03 FB-001 Concrete Floor A5 92.34 FB-001 Concrete Floor A6 33.45 FB-001 Concrete Floor A7 43.26 B13-001 Concrete Floor B3 1027 FB-001 Concrete Floor B4 60.48 FB-001 Concrete Floor B5 60.49 FB-001 Concrete Floor B6 50.3

10 1FB-001 Concrete Floor B7 60.411 113-001 Concrete.Floor C3 17112 1B13-001 Concrete Floor C4 50.313 FB-001 Concrete Floor C5 141

* 14 FB-001 Concrete Floor C6 16115 P13-001 Concrete Floor C7 62.916 FB-001 Concrete Floor D3 70.517 FB-001 Concrete Floor D4 10218' FB-00.1 Concrete Floor D5 72.719 FB-001 Concrete Floor D6 72.720 FB-001 Concrete Floor D7 92.321 FB-001 Concrete Floor E3 80.5

.22 FBP-001 Concrete Floor 1_4 82.523 FB-001 Concrete Floor E5 72.724 FB-001 Concrete Floor 16 82.525 B13-001 Concrete Floor E7 72.7.26 FB-001 Concrete Floor F3 11127 FB-001 Concrete Floor F4 14128. FB-001 Concrete Flodr F5 16129 FB-001 Concrete Floor F6 26930 FB-001 Concrete'Floor M7 92.331 FB-001 Concrete Floor G3 4-10.132 FB-001 Concrete Floor G4 82.533 1FB-001 Concrete Floor G5 12234 FB-001 Concrete Floor G6 43.235 FB-001 * Concrete Floor G7 43.236 FB-001 Concrete Floor -H3 10137 FB-001 Concrete Floor H4 33.4

Q.-W40007PA4O7FSS RepotsVe",x CTables\TAbe2 PPage 12 of 17

AJENDIX CTable 2 - Concrete Structural Surface Reference Area Sample Results

Reference Flux. Building Location Grid Total AlphaGroup Sample Survey Unit Contamination

No. _(dprn/lOOem2)

38 FB-001 Concrete Floor H5 72.739 FB-001 Concrete Floor H6 33.440 FB-001 Concrete Floor H7. 72.741 FB-001. Concrete Floor 13 80.542 FB-001 Concrete Floor 14 92.343 FB-001 Concrete Floor 15 72.744 FB-001 Concrete Floor 16 10245 FB-001 Concrete Floor 17 62.946 FB-001 Concrete Floor J3 15147 FB-001 Concrete Floor J4 14148 FB-001 Concrete Floor 35 10249 FB-001 Concrete Floor J6 10250 FB-001 Concrete Floor P7 33.451 FB-002 Concrete Floor .FSS-002 10752 FB-002 Concrete Floor FSS-004 56.453 FB-002 Concrete Floor FSS-006 • 66.454 FB-002 Concrete Floor FSS-008 66.455 FB-002 Concrete Floor FSS-010 16.156 FB-002 Concrete Floor FSS-012 36.257. FB-002 Concrete'Floor FSS-014 •66.458 FB-002 Concrete Floor FSS-016 .12759 FB-003 Concrete Floor FSS-001 50.360 FB-003 Concrete Floor FSS-002 30.261 FB-003 Concrete Floor FSS-004 50.362 FB-003 Concrete Floor FSS-005 80.563 FB-003 Concrete Floor FSS-008 40.364 FB-003 Concrete Floor FSS-009 40.365 FB-003 Concrete Floor FSS-012 30.266 FB-003 Concrete Floor FSS-013 80.567- FB-003 Concrete Floor FSS-016 15168 FB-003 Concrete Floor * FSS-017 60.4.69 FB-003 Concrete Floor FSS-003 10270 FB-003 Concrete Floor FSS-006 43.271 FB-003 Concrete Floor FSS-007 72.772 FB-003 Concrete Floor FSS-010 62.973 FB-003 Concrete Floor . FSS-011 11274 FB-003 Concrete Floor FSS-014 13.8"

Q.'400XPA4072WSS Repofstpendx CkTates\TAW4e2 Page 13 of 17

APPENDIXcTable 2 - Concrete Structural Surface Reference Area Sample Results


No. (dpm/LOOcm 2)75 FB-003 Concrete Floor FSS-015 62.976 FB-007 Concrete Floor FSS-004 72.577 FB-007 Concrete Floor FSS-006 82.578 FB-007 Concrete Floor FSS-009 12379 FB-007 Concrete Floor FSS-010. 52:3


79.742.5-10.126972.779

QAP4000%PMO72TFS$ r~ofekperdsxc CQTabe~e\ffe2Pae1of7 Page 14 of 17

APPENDIX CTable 3 - Cinderblock Structural Surface Reference Area Sample Results

Reference Flux Building Location 'Grid Total AlphaGroup Sample Survey Unit Contamination

No. (dpn/lOOcmn)

I FB-001 Painted Cinderblock Wall Al 10.12 FB-001 Painted Cinderblock Wall A2 20.13 FB-001 Painted Cinderblock Wall B1 13.84 FB-001 Painted Cinderblock Wall B2 13.85 B13-001 Painted Cinderblock Wall CI 30.26 FB-001 Painted Cinderblock Wall C2 1117 FB-001' Painted Cinderblock Wall D 1 60.48 .FB-001 Painted Cinderblock Wall D2 30.29 B13-001 Painted Cinderblock Wall El -10.110 B13-001 Painted Cinderblock Wall E2 0.011 FB-001 Painted Cinderblock Wall F1 0.012 FB-001 Painted Cinderblock Wall F2 30.213 FB-001 Painted Cinderblock Wall G1 40.314 FB-001 Painted Cinderblock Wall G2 -10.115 FB-001 Painted Cinderblock Wall HI 20.116 B13-001 Painted Cinderblock Wall H2 80.517 FB-001 Painted Cinderblock Wall I1 40.318 FB-001 Painted Cinderblock Wall 12 20.119 FB-001 Painted Cinderblock Wall Ji 0.020 FB-001 Painted Cinderblock Wall J2 40.321 FB-001 Painted Cinderblock Wall K3 .10.122 FB-001 Painted Cinderblock Wall K4 33.423 FB -001 Painted Cinderblock Wall K5 23.624 FB-001 Painted Cinderblock Wall K6 20.125 FB-001 Painted Cinderblock Wall K7 40.326 FB-001 Painted Cinderblock Wall L3 30.227 P3-001 Painted Cinderblock Wall IA 10.128 FBP-001 Painted Cinderblock Wall L5 10.129 FB.-001 Painted Cinderblock Wall L6 10.130 FB-001 Painted Cinderblock Wall. V7 20.131 FB-002 Painted Cinderblock Wall FSS-001 5.8932 FB-002 Painted Cinderblock Wall FSS-003 15.733 FB--002 Painted Cinderblock Wall FSS-005 25.534 FB-002 Painted Cinderblock Wall FSS-007 15.7

QSP40Nc7PA4O72'SS RepoftAppend1x CWabqes\Tabje3Page 15 of 17

APPENDIX CTable 3 - Cinderblock Structural Surface Reference Area Sample Results


No. (dpni/lO0cm2)

1 FB-001 Painted Cinderblock Wall Al 10.135 FB-002 Painted Cinderblock Wall FSS-009 5.8936. FB-002 Painted Cinderblock Wall FSS-01 1 5.8937 FB-002 Painted Cinderblock Wall FSS-013 15.738 FB--002 Painted Cinderblock Wall FSS-015 45.239 FB-002 Painted Cinderblock Wall FSS-017 45.240 FB-004 Painted Cinderblock Wall 3 20.141 FB-004 Painted Cinderblock Wall 7 0.042 FB-004 Painted Cinderblock Wall 9 40.343 P13-004 Painted Cinderblock Wall 11 -10.144 P3-004 Painted Cinderblock Wall 13 10.145 FB-004. Painted Cinderblock Wall 2 3.9346 B13-004 Painted Cinderblock Wall 6 3.9347 FB-004 Painted Cinderblock Wall 8 62.948 FB-004 Painted Cinderblock Wall 10 43.249 FB-004 Painted Cinderblock Wall 12 33.450 P3-004 Painted Cinderblock Wall 14 3.9351 FB-006 Painted Cinderblock Wall FSS-011 78.652 FB-006 Painted Cinderblock Wall FSS-012 29.553. FB-006 Painted Cinderblock Wall FSS-013 88A54 FB-006 Painted Cinderblock Wall FSS-014 68.855 FB-007 Painted Cinderblock Wall FSS-001 12.156 FB-007 Painted Cinderblock Wall FSS-002 2.01-57 FB-007 Painted Cinderblock Wall FSS-005 32.258 FB-007 Painted Cinderblock Wall FSS-007 2.0159 FB-007 Painted Cinderblock Wall FSS-008 22.160 FB-007 Painted Cinderblock Wall FSS-011 2.0161 FB-007 Painted Cinderblock. Wall FSS-012 12.162 FB-007 Painted Cinderbloek Wall FSS-014 : 12.163 FB-008 Painted Cinderblock Wall FSS-001 6,0464 FB-008 Painted Cinderblock Wall FSS-002 -4.0365 FB-008 Painted Cinderblock Wall FSS-003 26.266 FB-008 Painted Cinderbloek Wall FSS-005 26.267 FB-008 Painted Cinderblock Wall FSS-007 26.2

Q-P4OOW.,4O77r$S Repoftap, MTabbes\Tab(e3Page 16 of 17

AIrENDix CTable 3 - Cinderblock Structural Surface Reference Area Sample Results

Reference Flux Building Location Grid Total AlphaGroup Sample SurveyUnit Contamination

No. (dpm/l00cm2)

1 FB-001 Painted Cinderblock Wall At 10.168 FB-008 Painted Cinderblock Wall FSS-008 36.269 FB 08 Painted Cinderblock Wall FSS-Ol1 26.270 PB-008 Painted Cinderblock Wall FSS-012 16.171 FB-008 Painted Cinderblock Wall FSS-013 6.0472 FB-008 Painted Cinderblock Wall FSS-014 16.1


23.423.4-10.1*111

20.172

Q.-P40QPPA4072TSS ReP• .•A~end, CATabes\Tale3 Page 17 of 17

Appendix I

1.4 Critical Values for the WRS Test

Table 1.4 Critical Values for the WRS test

mn is the number of reference area samples and n is the number of survey unit samples.

11= 2.

m=2'' a-0.001 7a=0.005 7u-0.01 7a.--0.025 7u=0.05 7" w0.1 7

3999998

411111111

10

5131313131211

6 '715 .1715 1715 1715 1714 16"13 15

6724 2724 27"24 2622 2521 2420 .22

8 919 2119 2119. 2118 2017 1916 18

10232323222119.

11 .12 13 1425 27 . 29" 3125 27 29 3125 27 28 3023 25 27 2923 24 26 2721.22 24 26

15333332312927

16 1735 3735 3734. 3633 3431 3329 30

18393938363432

18595755525046

19 2041 4340 4239 4138 4036 3833 35

19 2062 6559 6258" 6055 5752 5448 50

n U= 2 3 4 5m=3 a=O.001 12 15 18 21

4.0.05 12 15 18 21CMzO.01 12'15 18 21a=0.025 12 15 18 20u=0.05 12 14.17 19a-0.-1 I1. 13 -16 18

8303029272624

9 1033 3632 3531 3430 3228 3127 29

11'393837353331

12424039373633

13 1445 4843 4642 4540 4238 4035 37

15 '1651 5448 5147 5045 4743 • 4540 42

17565452504744

2-m=4 e=0.001 18

0=0.005 18

Q=0.01 18a=0.025 18U=0.05 18.- =-O.l 17

n= 2m=5 a=0.001 25

u=O.005 25U-0.O1 25,--0.025 25

a=0.05 24a-=O. 1 23

n- 2m=6 d=0.001 33

u=0.005 33a=0.01 33a=0.025 33.=0.05 32

u4-.1 31

3 422 2622 2622 2622 2521 2420 22

3 430 3530 3530 3429 3328 3227 30

3 439 4539 4439 4337 4236 4135 39

5.303029282725

5403938373534

5514948474543

6 7 834 38- 4233 37 4032.36 3931 34 3730 33. 3628 31 34

6454342413937

6575453514947

7.5O4846444341

7635958565451

8545250484644

8676462605855

9464442413936

9585654525047

9726967646259

10" 1149 5347 5146 4944 4742 4539 42

12. 13 1457 60 6454 -58 6152 56 5950 53 .5648 51 5445 48 50

15686462595753

16716866625956

106360585653SI

10777472696663

I

11 1267 7264 6862. 6660 6357 6154 57

17 1875 7871 .7569 7266 6962 6559 61

"1982787672.6864

20868179757167

13 1476 8172 7770 7467 .7164 6861 64

15 1685 8981 8578 8275 .7971 7567 71

17948986827974

18 19 2098 102 10793. 97 10190 94 9886 90 9482. 86 8977 81 84

11827977737067

"12888381787571

13 .14 15 16 17 18 19 2093 98 103 108 113 118 123 12888 93 98 103 107 112 117'122.86 91 95 100 104 109 114 11882 87 91 95 100 104 109 11379 83 87 '91 96 100 104 10875 79 .83 87 91 94 98 102

MARSSIM, Revision I 1-6 August 2000

Appendix I

Table 1.4 Critical Values for the WRS Test (continued)

n= 2m=7 a=0.O01 42

a=0.005 42u=O.O1 42a -=0.025 42u=O.05 41.-=O.l 40

m=8n= 2a-0.001 52u=0.005 52a,=0.01 52a.=0.025 51a.=0.05 50a=-0.1 .49

3494948474644

3606059575654

3727i70696766

4565554525149

4686665636260

5636159575654

5757371696765

6696665636158

6827977757370

6.969391888683

7757270686563

7898584817875

881777673

.7067

8959290868480

9878381787572

10928886838076

11989492888581

121049997939085

9 10102 10998 10496 10292 9889 9585 91

11 12115 122110 116108 114104 109100 10596 101

13 14 15 16 17 18128 135 141 1 48 154 161122 129 135 141 147 153120 125 131 137 143 149115 121 126 132 137 143111 116 122 127 132 138106"111 1.16 121 126 131

13 14 15 16 17 18 19 20110 116 122 128 133 139 145 151105 110 116 121 127 132 138 143102 108 113 118 123 129 134 13998 103 108 113 118 123 128 13394 99 104 109 113 118 123 12890 94 99 103 108 112 117 121

19 20167 174159 165155 161149 154143 148136 141

19 20190 198182 188177 184170 176164 170157 162

n= 2m=9 uc=0.001 63

-a=0.005 63v;-0.01 63u=0.025 62cc=0.05 61cc=.l 60

n= 2m=10 u=0.001 75

,--O.O05 .75v-0.01 75a;=0.025 74c,-0.05 730,=0.1 71

4 581 8879 8677 8476 8274" 8071 77

7 8 9 10104 111 118 126100 107 114 12198 105 111 11895 101 108 11492 98 104 11089 94 100 106

11 12133 140127 134125 131120 126116 122112 117

13 14 15147 i55 162141 148 155138 144 151133 139 145128 134 140123 129 134

16 17 18169 176 183161 168 175157 164 170151 158 164146 152 158140 145 151

3 4.85 9484 9283 9181 8980 8778 84

.510310098969391

6 7 8 9 10 11 12111 119 128 136 144 152 160108 115 123 131 138 146 153106 113 121 128 135 142 150103 110 117 124 131 138 145100 107 114 120-127 133 14097 103 110 116 122 128 135

13 14 15167 175 183160 168 175157 164 171151 158 165147 153 160141 147 153

13 14 15188 197 206181 189 197177 185 193171 179 186166 173 180160 167 173

16 17 18 19 20191 199 207 215 222183 190 197 205 212178 186 193 200 207172 179 186 192 199166 173 179 186 192160 166 172 178 184

.-- =11 0,--0.001

v-=0.005U=0.01a=0.025a=0.05eV--0.1

2888888878684

3 4 5 6 7 8 9 10 .11 1299 109 118 127 136 145 154 163 171 18098 107 115 124 132 140 148 157 165 17397 105 113 122 130 138 146 153 161 16995 103 111 118 126 134 141 149 156 16493 101 108 115 123 130 137 144 152 15991 98 105 112 119 126 133 139 146 153

16 17 18214 223 231205 213 221200 208 216194 201 208187 195 202180.187 194

19 20240 248229 237224 232216 223209 216201 207

August 2000 I -7 MARSSIM, Revision I

Appendix I


mn=12 a=0.001a=0.005a=0.01* ,a=0.025Q=0.05Ua-0.1

21021021021009997

3 4 5114 125 135112 122 131111 120 129109 118 126108 116 124105 113 120

3 4 5130141 152128 139 148127 137 146125 134 143.123 132 140120 129 137

6145140138135132128

7 8 9 10154 164 173 183149 158 167 176147 156 164 173143 151 159 168140 147 155 165135 143 150 158

n= 2m=13 a=0.001 117

a=O.005 117a--.01 . 116c=0.025- 115a=0.05 114*a=.1 112

21= 2*m=14 a,-0.001 133

a=0.005 133a4=.01 132u=0.025 131aU4.05 129U=4.1 128

n- 2" m=15 U=0.001 150

a=0.005 150c--0.01 149a=0.025 148u--0.05 146

=*0.1 144

n= 2m-=16 c:=0.001 168

v;=0.005 168a=0.01 167c;-0.025 166u=0.05 164u4--.1 162

6 7 8 9163 173 183 193158 168 177 187156 165 174 184152 161 170 179149 157 166 174145 153 161 169

10203196193187183177

11 12192 202185 194181 190176 184171 179165 172

11 12213 223206215202211196 205191 199185 193

11 12236 247228 238224 234218 227212221206214

13 14 15233 243 253225 234 243220 229 238214 222 231208 216 224201 209 217

13 14 15 16 17 18 19 20210 220 230 238 247 256 266 275202211 220 228 237 246 254 263198 207 215 223 232 240 249 257192200208 216 224 232 240 248186 194 202 209 217 225 233 240180 187 194 202 209 216 224 231

16 17 18 19 20263 273 282 292 302253 262 271 280 290247 256 265 274 283239 248 257 265 274233 241 249 257 266224 232 240 248 256

3 4 5 6 7 8 9 10147 159 171 182 193 204 215 225145.156 167 177 187 198 208 218144154 164'175 185 194 204 214141 151 161 171 180 190 199 208139 149 158 167 176 185 194 203136 145 154 163 171 180.189 197

3 4 5 6 7 8 9 10 11 12165 178 190 202 212 225 237 248 260 271162 174 186 197 208 219 230 240 251 262161 172 183 194 205 215 226 236 247 257159 169 180 190 200 210 220 230 240 250157 167 176 186 196 206 215 225 234 244154 163 172 182 191 200 209 218 227 236

3 4 5 6 7 8 9 10 11 12184 197 210 223 236 248 260 272 284 296181 194 206 218 229 241 252 264 275 286180 192 203 215 226 237 248 259 270 281177 188 200 210 221 232 242 253 264 274175 185 196 206 217 227 237 247 257 267172 182 192 202 211 221 231 241 250 260

13 14 15 16 17 18 19 20257268 278 289 299 310 320 330248 258 268 278 288 298 307 317243 253 263 272 282 291 301 311236 245 255 264 273 282 292 301230 239 248 257 265 274 283 292223 231 240 248 257 265 273 282

13 14 15 16 17 18 19 20282 293 304 316 327 338 349 360272 283 293 304 314 325 335 346267 278 288 298 308 319 329 339260 270 280 289 299 309 319 329253 263 272 282 291 301 310319246 255 264 273 282 291 300 309

13 14 15 16 17 18 19 20308 320 332 343 355 367 379 390298 309 320 331 342 353 365 376292303 314 325 336 347 357 368284 295 305 316 326 337 347 357*278 288 298 308 318 328 338 348269 279 289 298 308 317 327 336

MARSSIM, Revision 1 1-8 August 2000

Appendix I


in=17 U=0.001u,=0.005

;=0.0250;=0.05

11=m=Is 0=--0.001

U,-=0.01

a=0.025* U=0.05

2187187186184183180

3 4 5203 218 232201 214 227199 212 224197 209 220194 205 217191 202 212

6 7 8 9 10245 258 271 284 297239 252 264 276 288236 248 260 272 284232 243 254 266 277228 238 249 260 271223 233 243 253 264

11 12310322300312295 307288 299282 292274 284

13 14 15 16 17 18 19 20335 347 360 372 384 397 409 422324 336 347 359 371 383 394-406318 330 341 353 364 376 387 399310 321 332 343 354 365 376 387303 313 324 335 345 356 366 377294 305 315 325 335 345 355 365

13 14 15 16 17 1 19 20362376 389 402 415 428 441 454351 364 376 388 401 413 425 438345 357 370 382 394 406 418 430337 348 360 372 383 395 406418329 340 352 363 374 385 396 407320 331 342.352 363 374 384 395

2 3 4. 5 6 7 8 9 10 11 12207 224 239 254 268 282 296 309 323 336 349207 222 236 249 262 275 288 301 313 326 339206 220 233 246 259 272 284 296 309 321 333204 217 230 242 254 266 278 290 302 313 325202 215 226 238 250 261 273 284 295 307 318200 211 222 233 244 255 266 277 "/2. .299 309

n1=

M--19 a-0.001U,-0.005U=0.01a.=0.025

22282272262275

3 4 5246 262 277243 258 272242 256 269239 252 265

6 7 8 9 10 11 12292 307 321 335 350 364 377286 300 313 327 340 353 366283 296 309 322 335 348 361278 290 303 315 327 340 352273 285 297 309 321 333 345267 279 290 302 313 325 336

13 14 15 16 17 18 19 20391405"419 433 446 460 473 487379392405 419431 444 457 470373 386 399 411 424 437 449 462364 377 389 401 413 425 437 450356368 380 392 403 415 427 439347358 370 381 392 403 415 426

--=0.05 223 236 248 261u-=0.1 220 232 244 256

n-=

rn=20 u=0.001Ux=0.005U=0.01a-0.025,

2250249248247

3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20269 286 302 317 333 348 363 377 392 407 421 435 450 464 479 493 507 521266281 296 311 325 339 353 367 381 395 409422436 450 463 477 490 504264 279 293 307 321 335 349 362 376 389 402 416 429 442 456 469 482 495261 275 289 302 315"329 341 354 367 380 393 406 419 431 444 457 470 482258 271 284 297 310 322 335 347 360 372 385 397 409 422 434 446 459 471254 267 279 291 303 315 327 339 351 363 375 387 399 410 422 434 446 458

u-0.05 245u-O.1 242

August 2000 1-9 A t MARSSIM. Revision 1

Appiendix I

Reject the null hypothesis if the test statistic MW,) is greater than the-table (critical) value.For n or m. greater than 20, the table (critical) value can be calculated from:

m(n+m.1)12.+ zlnm(n+m+l)/12 (1.1)

if there are few or no ties, and from

2m(n+m,.-l)2 + (z 1t(,-+-)-_ (1.2)

12- - j=I(n+mXn+m-1)

if there are many ties, where g is the number of groups of tied measurements and t is the number oftied measurements in the jth group. z is the (1-6) percentile of a standard normal distributiofi, whichcan be found in the following table:

a z

0.001 3.090.005 2.5750.0i 2.3260.025 1.9600.05 1.6450.1 1.282

•Other values can be found in Table I-1.

MARSSIM, Revision I 1-10 August 2000

APPENDIX D

CAVE COUNTER CALIBRATION AND SOIL SAMPLE RESULTS

Appendix DOn-Site Cave Counter

Final Status Survey ReportThorium Remediation Project


Certain soil samples collected as part of the final status survey process are screened for.Th-232 activity concentration using an on-site cave counter (counter). The on-site cavecounter for the Thorium Remediation Project consists of a 2-inch by 2-inch Nal LudlumModel 44-10 detector coupled with a Ludlum Model 2221 Scaler/Ratemeter instrument,mounted inside a shielded box with room for a standard soil sample container to beplaced on the face (bottom, non-wire connecting end) of the detector. Two detectors(numbered NaI # 4 and Nal #8) have been used as part .of the counter. The detectorswere all calibrated annully off-site by a qualified vendor to verify their response to highenergy photons. The detectors, including their use as part of the counter, are utilized toobtain gross gamma readings from soil samples in units of counts per minute (cpm). Thedetector response is checked daily when in use to a Cs-137 source.

In addition to the off site calibration, Detectors Nal #4 and NaI #8 have been calibratedon-site to verify the response of the detector to soil (or soil like material) containing Th-232 in equilibrium with all progeny. A well characterized sample of material used tocalibrate another on-site counter system (the SMCM system) was used to calibrate bothdetectors. The documentation of the calibrations is included in this appendix.

The result of the on-site calibration is a detector specific calibration factor (OF) in unitsof pico-Curies of Th-232 per net counts per minute (pCi/cpm). The inverse of the CF isreferred to as the instrument efficiency in units of cpm/pCi and is. used to convert thegross gamma response of the detector in cpm to pCi/g of Th-232 within a standard soilsample as follows:

1. A standard soil sample of background soil is counted. Usually for 5 minutes eachday the counter is used. The time and total counts are recorded as "1BKG CountTime" and "BKG Counts." In addition, the sample is weighed (net) and theresulting weight is recorded. Since the same sample is used each day, theresulting weight is consistently 570 or 571 grams. The value of 570 grams.yield amore conservative MDC result, and therefore is used daily.

2. A standard soil sample is weighed in units of grams (g) and recorded as "SampleWeight". A standard empty soil container is also weighed. The sample weight isthe net of the soil sample less the empty container weight.

3. The sample is placed inside the lead shielded box (standard repeatable countinggeometry) and the Nal detector is placed on top of the container. Usually, a oneminute count is performed and recorded as "Gross Count Rate Top".

4. The sample is re-placed in the standard counting geometry upside down. Another1 minute count is performed and recorded as "Gross Count Rate Bottom".

Q.\?4O00lA4072•\•$S port-fMA•Padix MkW=&x D - Cawe Coat.udc * D-1

5. The background count rate is subtracted from the average of the top and bottomsample count rates and recorded as "Net Count Rate Average".

6. The net count rate is then converted to pCi/g of Th-232 by dividing the net countrate average by the instrument efficiency (cpm/pCi) and the sample weight (g)and recorded as "Th-232". The instrument efficiency is equal to 1 / CF (in unitsof pCi/cpm).

7. The standard error for the count is then calcuiated and recorded as "95% CLUncertainty" as follows:

1 C. b CR6 CR.tb 1t tb

UnjC9%d.E.Wwhere:

Unc9gs1-CRs,

tst -CRbtb -

WE -

95% confidence level (2 sigma) uncertainty in pCi/g,sample bottom count rate in counts per minute,sample bottom count time in minutes,sample top count rate in counts per minute,sample top count time in minutes,background count rate in counts per minute,background count time in minutes,sample weight in g, anddetector efficiency (- I/CF) in cpm/pCi

8. The minimum detectable concentration is calculated and recorded as "MDC' asfollows:

3 + 3.29Ft -( 1*.(+.i..MDC

t, .E.Wr

'where:

MDCBRt

tB

tsWE

minimum detectable concentration in pCi/g,background count rate in counts per minute,background count time in minutes,sample count time in minutes,sample weight in g, anddetector efficiency in cpm/pCi

A summary of the two instrument/detectors used for cave counts is presented below inTable D-1.

Q.T40MA4072\PS R4ot•n Appmix UfApc*K D - Cave Ccuwcoc D-2

The conversion of count data to a result in pCi/g of Th-232, the 95% confidenceuncertainty (standard 2 sigma error) and the Minimum Detectable Concentration (MDC)for the count, all in units of pCi/g, for various samples (not analyzed by Outreach) are.presented in the attached Appendix D, Table D-2.

Table D-1 - Cave Counter Detector SummaryOn-Site Calibration Efficiency=

Instrument Detector Calibration Factor I/CFNumber Serial #: Serial #: Date (epm/pCi/g) (Pci/gf/pm)

4 172053 PR206815 12/03/04 4.41 0.2278 216513 PPR230093 1 /03/05 4.46 0.224

4OOO\?A4OMM UVMVPýtWudi padiD-ct6 D-3

C (Appendix D, Table D-2

Cave Counter DataFinal Status Survey

Thorium Remediation ProjectTulsa, Oklahoma Facility

Kaiser Aluminum & Chemical Corportion

C

Gross NetDetector Sample Net Gross Count BKG BKG Count

Efficiency Count Sample Count Rate Count Sample Rate 95% CLDet. (cpm/ Sample Sample Time Weight Rate Top Bottom Time BKG Weight Average Th-232 Unc. MDC

Count Date #: pCi) No. Type Survey Unit (min) (g) (cpm) (cpm) (min) Counts (g) (cpm) (pCi/g) (pCi/g) (pCi/g)

1/12/05 4 0.227 K-466 Biased FOA-001 1 752 3,059 3,192 5 14,476 570 230 1.35 0.950 1.52

1/12/05 4 0.227 K-467 Biased FOA-001 1 715 2,817 3,143 5 14,476 570 85 0.523 0.978 1.52

1/12/05 4 0.227 K-468 Biased FOA-001 1 822 3,014 3,330 5 14,476 570 277 1.49 0.875 1.52

1/12/05 4 0.227 K-469 Biased FOA-001 1 817 3,107 3,257 5 14,476 570 287 1.55 0.882 1.52

1/17/05 4 0.227 K-471 Biased FOA-001 1 846 3,028 3,440 5 15,127 570 209 1.09 0.859 1.56

5/16/05 4 0.227 K-658 Biased FOA-005 1 568 2,880 2,952 5 15,215 570 -127 -0.986 1.22 1.56

5/16/05 4 0.227 K-659 Biased FOA-005 1 576 2,861 3,028 5 15,215 570 -99 -0.754 1.21 1.56

5/16/05 4 0.227 K-660 Biased FOA-005 1 666 3,262 3,098 5 15,215 570 137 0.907 1.08 1.56

5/16/05 4 0.227 K-661 Biased FOA-005 1 682 3,066 3,252 5 15,215 570 116 0.750 1.05 1.56

6/1/05 4 0.227 K-710 Biased FOA-005 1 732 3,542 3,562 5 15,360 570 480 2.89 1.04 1.57

5/31/05 4 0.227 K-711 Biased FOA-005 1 718 3,353 3,343 5 15,165 570 315 1.93 1.03 1.56

5/31/05 4 0.227 K-712 Biased FOA-005 1 648 3,142 3,433 5 15,165 570 255 1.73 1.13 1.56

6/28/05 4 0.227 K-755 Biased FOA-006 1 775 2,745 2,882 5 14,865 570 -160 -0.908 0.880 1.54

6/28/05 4 0.227 K-759 Biased FOA-006 1 805 3,359 3,331 5 14,865 570 372 2.04 0.916 1.54

6/28/05 4 0.227 K-772 Biased FOA-006 1 645 3,074 3,141 5 14,865 570 135 0.920 1.11 1.54

6/27/05 4 0.227 K-773 Biased FOA-006 1 653 3,215 3,419 5 15,105 570 296 2.00 1.13 1.56

2/14/05 4 0.227 K-524 Biased FSS-013 1 712 3,573 3,436 5 14,534 570 598 3.70 1.06 1.53

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'¶ CAppendix D, Table D-2




C




12/6/05 8 0.224 K-552 Biased FSS-014 10 696 26,779 28,659 10 28,220 570 -50 -0.321 0.363 0.614

4/14/05 4 0.227 K-570 Biased FSS-015 1 836 3,427 3,105 5 14,870 570 292 1.54 0.873 1.54

4/14/05 4 0.227 K-571 Biased FSS-015 1 838 3,279 3,311 5 14,870 570 321 1.69 0.874 1.54

4/14/05 4 0.227 K-572 Biased FSS-015 1 706 3,122 3,113 5 14,870 570 144 0.896 1.01 1.54

4/18/05 4 0.227 K-574 Biased FSS-015 1 734 3,218 3,273 5 14,703 570 305 1.83 0.991 1.54

4/18/05 4 0.227 K-575 Biased FSS-015 1 616 2,996 3,126 5 14,703 570 121 0.863 1.15 1.544/18/05 4 0.227 K-576 Biased FSS-015 1 635 3,132 3,073 5 14,703 570 162 1.13 1.12 1.54

12/6/05 8 0.224 K-625 Biased FSS-015 10 673 28,765 29,472 10 28,220 570 90 0.595 0.382 0.614

4/26/05 4 0.227 K-626 Biased FSS-015 1 581 3,359 3,397 5 16,175 570 143 1.09 1.28 1.61

12/6/05 8 0.224 K-627 Biased FSS-015 10 539 26,779 28,659 10 28,220 570 -50 -0.415 0.469 0.614

4/26/05 4 0.227 K-630 Biased FSS-015 1 224 3,317 3,225 5 16,175 570 36 0.709 3.27 1.61

6/15/05 4 0.227 K-716 Biased FSS-016 1 825 3,883 3,624 5 15,310 570 692 3.70 0.944 1.57

6/15/05 4 0.227 K-718 Biased FSS-016 1 777 4,169 3,884 5 15,310 570 965 5.47 1.04 1.57

6/15/05 4 0.227 K-720 Biased FSS-016 1 635 3,598 3,886 5 15,310 570 680 4.72 1.22 1.57

6/15/05 4 0.227 K-721 Biased FSS-016 1 644 3,823 3,675 5 15,310 570 687 4.70 1.21 1.57

11/29/05 8 0.224 1K-751 Biased FSS-016 1 849 2,789 2,811 5 13,695 570 61 0.320 0.807 1.50

11/29/05 8 0.224 K-753 Biased FSS-016 1 785 2,702 2,889 5 13,695 570 57 0.321 0.872 1.50

C:ADocuments and SellingsftbennettLocal Settings\Temporary Internet Fites\OLK35•nal App D Table 2 Cave Counter Dataxls 2 of 17

C CAppendix D, Table D-2




C


Efficiency Count Sample Count Rate Count Sample Rate 95% CLDet. (cpm / Sample Sample Time Weight Rate Top Bottom Time BKG Weight Average Th-232 Unc. MDC


11/29/05 8 0.224 K-754 Biased FSS-016 1 883 2,707 2,918 5 13,695 570 74 0.371 0.778 1.50

11/29/05 8 0.224 K-762 Biased FSS-016 1 624 2,696 2,862 5 13,695 570 40 0.286 1.09 1.50

11/29/05 8 0.224 K-763 Biased FSS-016 1 568 2,974 2,766 5 13,695 570 131 1.03 1.22 1.50

11/29/05 8 0.224 K-764 Biased FSS-016 1 570 2,613 2,976 5 13,695 570 56 0.434 1.20 1.50

11/29/05 8 0.224 K-765 Biased FSS-016 1 571 2,689 2,880 5 13,695 570 46 0.355 1.20 1.50

11/29/05 8 0.224 K-766 Biased FSS-016 1 685 2,559 2,809 5 13,695 570 -55 -0.358 0.982 1.50

11/29/05 8 0.224 K-767 Biased FSS-016 1 721 3,000 2,976 5 13,695 570 249 1.54 0.979 1.50

12/6/05 8 0.224 K-799 Biased FSS-017 10 665 29,213 28,894 10 28,220 570 83 0.559 0.386 0.614

12/6/05 8 0.224 K-800 Biased FSS-017 10 677 27,951 29,213 10 28,220 570 36 0.238 0.377 0.614

12/6/05 8 0.224 K-801 Biased FSS-017 10 623 28,764 29,627 10 28,220 570 98 0.698 0.413 0.614

12/6/05 8 0.224 K-945 Biased FSS-018 10 694 28,008 29,067 10 28,220 570 32 0.204 0.368 0.614

12/6/05 8 0.224 K-946 Biased FSS-018 10 703 29,244 29,137 10 28,220 570 97 0.616 0.366 0.614

8/8/05 4 0.227 K-941 Biased FSS-019 1 653 3,255 3,085 5 15,130 570 144 0.972 1.10 1.56

8/8/05 4 0.227 K-942 Biased FSS-019 1 917 3,527 3,235 5 15,130 570 355 1.71 0.809 1.56

8/8/05 4 0.227 K-943 Biased FSS-019 1 738 3,008 3,196 5 15,130 570 76 0.454 0.966 1.56

8/8/05 4 0.227 K-944 Biased FSS-019 1 657 2,930 3,146 5 15,130 570 12 0.081 1.08 1.56

9/29/05 4 0.227 K-1058 Biased FSS-020 1 892 3,632 3,555 5 15,160 570 562 2.78 0.855 1.56

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C

Gross Net

Detector Sample Net Gross Count BKG BKG CountEfficiency Count Sample Count Rate Count Sample Rate 95% CL

Det. (cpm/ Sample Sample Time Weight Rate Top Bottom Time BKG Weight Average Th-232 Unc. MDCCount Date #: pCi) No. Type Survey Unit (min) (g) (cpm) (cpm) (min) Counts (g) (cpm) (pCi/g) (pCi/g) (pCi/g)

9/29/05 4 0.227 K-1059 Biased FSS-020 1 827 3,513 3,256 5 15,160 570 353 1.88 0.898 1.5610/8/05 4 0.227 K-1163 Biased FSS-020 1 665 2,948 3,121 5 14,550 570 125 0.826 1.06 1.5310/8/05 4 0.227 K-1164 Biased FSS-020 1 603 2,911 2,919 5 14,550 570 5 0.037 1.15 1.539/30/05 4 0.227 K-1203 Biased FSS-020 1 612 3,422 3,141 5 15,110 570 260 1.87 1.20 1.569/30/05 4 0.227 K-1204 Biased FSS-020 1 604 3,339 3,159 5 15,110 570 227 1.66 1.21 1.56

10/3/05 4 0.227 K-1205 Biased FSS-020 1 668 3,104 2,983 5 14,975 570 49 0.320 1.06 1.5510/4/05 4 0.227 K-1206 Biased FSS-020 1 616 3,285 2,982 5 14,875 570 159 1.13 1.16 1.5410/4/05 4 0.227 K-1207 Biased FSS-020 1 612 2,995 3,026 5 14,875 570 36 0.256 1.15 1.5410/4/05 4 0.227 K-1208 Biased FSS-020 1 918 3,072 3,222 5 14,875 570 172 0.826 0.782 1.5410/4/05 4 0.227 K-1209 Biased FSS-020 1 719 3,032 3,288 5 14,875 570 185 1.13 1.00 1.54

10/4/05 4 0.227 K-1210 Biased FSS-020 1 698 3,343 3,147 5 14,875 570 270 1.71 1.04 1.54

9/29/05 4 0.227 K-1057 Biased FSS-021 1 660 3,269 3,221 5 14,945 570 256 1.71 1.10 1.55

9/29/05 4 0.227 K-1061 Biased FSS-021 1 627 3,239 3,393 5 14,945 570 327 2.30 1.17 1.55

9/29/05 4 0.227 K-1062 Biased FSS-021 1 598 3,319 3,340 5 14,945 570 341 2.51 1.23 1.55

9/29/05 4 0.227 K-1063 Biased FSS-021 1 648 3,389 3,190 5 14,945 570 301 2.05 1.13 1.55

10/20/05 4 0.227 K-1238 Biased FSS-022 1 623 3,325 3,187 5 15,400 570 176 1.25 1.17 1.57

10/20/05 4 0.227 K-1239 Biased FSS-022 1 886 3,466 3,723 5 15,400 570 515 2.56 0.862 1.57

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Efficiency Count Sample Count Rate Count Sample Rate 95% CLDet. (cpm / Sample Sample Time Weight Rate Top Bottom Time BKG Weight Average Th-232 Unc. MDC

Count Date #: pCi) No. Type Survey Unit (min) (g) (cpm) (cpm) (min) Counts (g) (cpm) (pCi/g) (pCi/g) (pCi/g)10/20/05 4 0.227 K-1240 Biased FSS-022 1 620 3,528 3,304 5 15,400 570 336 2.39 1.20 1.5710/20/05 4 0.227 K-1241 Biased FSS-022 1 609 3,402 3,232 5 15,400 570 237 1.72 1.21 1.5710/20/05 4 0.227 K-1242 Biased FSS-022 1 562 3,184 3,420 5 15,400 570 222 1.74 1.31 1.5710/20/05 4 0.227 K-1243 Biased FSS-022 1 573 3,247 3,413 5 15,035 570 323 2.49 1.29 1.5510/20/05 4 0.227 K-1244 Biased FSS-022 1 540 2,952 3,207 5 15,035 570 73 0.592 1.32 1.5512/1/05 8 0.224 K-1340 Biased FSS-023 1 726 3,030 2,954 5 13,785 570 235 1.44 0.973 1.5012/1/05 8 0.224 K-1341 Biased FSS-023 1 667 2,923 3,122 5 13,785 570 266 1.78 1.06 1.5012/1/05 8 0.224 K-1342 Biased FSS-023 1 695 3,099 3,118 5 13,785 570 352 2.26 1.03 1.5012/1/05 8 0.224 K-1343 Biased FSS-023 1 601 2,949 3,077 5 13,785 570 256 1.90 1.18 1.5012/1/05 8 0.224 K-1344 Biased FSS-023 1 837 3,291 3,231 5 13,785 570 504 2.69 0.878 1.5012/1/05 8 0.224 K-1345 Biased FSS-023 1 967 3,148 3,188 5 13,785 570 411 1.90 0.750 1.501/24/06 8 0.224 K-1408 Biased FSS-024 1 833 2,993 3,098 5 13,920 570 262 1.40 0.856 1.511/24/06 8 0.224 K-1458 Biased FSS-024 1 564 2,803 2,885 5 13,920 570 60 0.474 1.22 1.511/24/06 8 0.224 K-1459 Biased FSS-024 1 788 3,094 3,141 5 13,920 570 334 1.89 0.914 1.513/28/05 4 0.227 K-565 Biased FSSB-003 1 645 7,281 6,352 5 15,035 570 3,810 26.0 1.60 1.554/1/05 4 0.227 K-566 Biased FSSB-003 1 645 8,266 6,922 5 15,336 570 4,527 31.0 1.68 1.57

4/13/05 4 0.227 K-568 Biased FSSB-003 1 645 7,047 6,513 5 14,915 570 3,797 26.0 1.59 1.55

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Efficiency Count Sample Count Rate Count Sample Rate 95% CLDet. (cpmr/ Sample Sample Time Weight Rate Top Bottom Time BKG Weight Average Th-232 Unc. MDC


4/13/05 4 0.227 K-569 Biased FSSB-003 1 645 6,806 6,453 5 14,915 570 3,647 24.9 1.58 1.554/15/05 4 0.227 K-573 Biased FSSB-003 1 645 6,897 6,112 5 14,885 570 3,528 24.1 1.56 1.544/20/05 4 0.227 K-577 Biased FSSB-003 1 645 5,693 5,095 5 14,890 570 2,416 16.5 1.43 1.54

5/10/05 4 0.227 K-635 Biased FSSB-004 1 593 5,492 5,067 5 14,915 570 2,297 17.1 1.54 1.55

5/10/05 4 0.227 K-636 Biased FSSB-004 1 737 7,984 6,028 5 14,915 570 4,023 24.1 1.42 1.555/11/05 4 0.227 K-637 Biased FSSB-004 1 682 7,031 5,437 5 15,210 570 3,192 20.6 1.45 1.56

5/17/05 4 0.227 K-662 Biased FSSB-004 1 520 5,847 5,423 5 15,050 570 2,625 22.3 1.81 1.55

5/17/05 4 0.227 K-663 Biased FSSB-004 1 576 6,812 6,520 5 15,050 570 3,656 28.0 1.77 1.55


5/19/05 4 0.227 K-667 Biased FSSB-004 1 738 5,581 4,696 5 15,770 570 1,985 11.9 1.22 1.59

5/19/05 4 0.227 K-668 Biased FSSB-004 1 606 5,830 5,710 5 15,770 570 2,616 19.0 1.57 1.59

5/19/05 4 0.227 K-669 Biased FSSB-004 1 531 5,855 5,044 5 15,770 570 2,296 19.1 1.75 1.59


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5/20/05 4 0.227 K-673 Biased FSSB-004 1 569 6,395 5,999 5 14,990 570 3,199 24.8 1.73 1.555/23/05 4 0.227 K-674 Biased FSSB-004 1 639 7,146 5,853 5 15,290 570 3,442 23.8 1.58 1.575/24/05 4 0.227 K-725 Biased FSSB-004 1 559 6,576 6,250 5 14,835 570 3,446 27.2 1.79 1.545/24/05 4 0.227 K-726 Biased FSSB-004 1 622 6,256 5,758 5 14,835 570 3,040 21.6 1.56 1.545/24/05 4 0.227 K-727 Biased FSSB-004 1 571 5,873 5,682 5 14,835 570 2,811 21.7 1.67 1.54


7/12/05 4 0.227 K-803 Biased FSSB-005 1 586 6,663 5,995 5 16,210 570 3,087 23.2 1.70 1.617/15/05 4 0.227 K-807 Biased FSSB-005 1 523 6,251 5,548 5 15,250 570 2,850 24.0 1.84 1.567/21/05 4 0.227 K-862 Biased FSSB-006 1 588 5,638 5,582 5 14,825 570 2,645 19.8 1.60 1.548/1/05 4 0.227 K-863 Biased FSSB-006 1 571 7,193 6,697 5 15,245 570 3,896 30.1 1.82 1.568/1/05 4 0.227 K-864 Biased FSSB-006 1 551 6,243 5,306 5 15,245 570 2,726 21.8 1.73 1.568/1/05 4 0.227 K-865 Biased FSSB-006 1 564 6,251 5,522 5 15,245 570 2,838 22.2 1.71 1.568/1/05 4 0.227 K-866 Biased FSSB-006 1 618 6,936 6,660 5 15,245 570 3,749 26.8 1.67 1.568/1/05 4 0.227 K-867 Biased FSSB-006 1 662 7,303 6,939 5 15,245 570 4,072 27.1 1.59 1.568/3/05 4 0.227 K-947 Biased FSSB-006 1 548 6,614 6,420 5 15,155 570 3,486 28.1 1.84 1.568/3/05 4 0.227 1 K-948 Biased FSSB-006 1 576 6,910 6,150 5 15,155 570 3,499 26.8 1.75 1.56

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Efficiency Count Sample Count Rate Count Sample Rate 95% CLDet. (cpm Sample Sample Time Weight Rate Top Bottom Time BKG Weight Average Th-232 Unc. MDC




8/10/05 4 0.227 K-953 Biased FSSB-006 1 597 6,447 6,187 5 15,135 570 3,290 24.3 1.67 1.568/10/05 4 0.227 K-954 Biased FSSB-006 1 581 6,603 6,378 5 15,135 570 3,464 26.3 1.73 1.568/10/05 4 0.227 K-955 Biased FSSB-006 1 516 6,225 6,301 5 15,135 570 3,236 27.7 1.92 1.568/10/05 4 0.227 K-956 Biased FSSB-006 1 562 6,307 5,808 5 15,135 570 3,031 23.8 1.73 1.568/10/05 4 0.227 K-957 Biased FSSB-006 1 551 6,220 5,795 5 15,135 570 2,981 23.9 1.76 1.568/10/05 4 0.227 K-958 Biased FSSB-006 1 593 6,466 6,012 5 15,135 570 3,212 23.9 1.67 1.568/31/05 4 0.227 K-1002 Biased FSSB-007 1 597 6,914 6,104 5 14,775 570 3,554 26.3 1.69 1.548/31/05 4 0.227 K-1003 Biased FSSB-007 1 566 6,316 6,040 5 14,775 570 3,223 25.1 1.74 1.548/31/05 4 0.227 K-1004 Biased FSSB-007 1 542 6,767 5,752 5 14,775 570 3,305 26.9 1.83 1.549/6/05 4 0.227 K-1008 Biased FSSB-007 1 585 6,793 6,152 5 14,775 570 3,518 26.5 1.72 1.54


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9/8/05 4 0.227 K-1018 Biased FSSB-007 1 578 6,442 5,912 5 14,875 570 3,202 24.4 1.70 1.54

9/20/05 4 0.227 K-1029 Biased FSSB-007 1 549 6,664 6,002 5 14,750 570 3,383 27.2 1.81 1.54

9/20/05 4 0.227 K-1030 Biased FSSB-007 1 509 6,324 5,598 5 14,750 570 3,011 26.1 1.90 1.54



9/14/05 4 0.227 KI-1193 Biased FSSB-007 1 659 6,535 5,497 5 15,080 570 3,000 20.1 1.47 1.55

9/12/05 4 0.227 K-1195 Biased FSSB-007 1 522 6,002 5,622 5 15,095 570 2,793 23.6 1.83 1.56

9/12/05 4 0.227 K-1196 Biased FSSB-007 1 567 5,885 5,439 5 15,095 570 2,643 20.6 1.66 1.56

8/31/05 4 0.227 K-1005 Biased FSSB-008 1 629 6,416 5,645 5 14,775 570 3,076 21.6 1.55 1.54

8/31/05 4 0.227 K-1006 Biased FSSB-008 1 587 6,628 6,057 5 14,775 570 3,388 25.4 1.70 1.54

8/31/05 4 0.227 K-1007 Biased FSSB-008 1 559 6,301 5,537 5 14,775 570 2,964 23.4 1.72 1.54

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Efficiency Count Sample Count Rate Count Sample Rate 95% CLDet. (cpmr/ Sample Sample Time Weight Rate Top Bottom Time BKG Weight Average Th-232 Unc. MDC


9/6/05 4 0.227 K-1012 Biased FSSB-008 1 577 6,356 6,335 5 14,775 570 3,391 25.9 1.73 1.54

9/6/05 4 0.227 K-1013 Biased FSSB-008 1 573 6,308 5,707 5 14,775 570 3,053 23.5 1.69 1.54

9/6/05 4 0.227 K-1014 Biased FSSB-008 1 602 6,931 5,708 5 14,775 570 3,365 24.6 1.65 1.54

9/20/05 4 0.227 K-1032 Biased FSSB-008 1 585 6,866 5,991 5 14,750 570 3,479 26.2 1.71 1.54

9/20/05 4 0.227 K-1033 Biased FSSB-008 1 575 6,571 6,474 5 14,750 570 3,573 27.4 1.76 1.54

9/20/05 4 0.227 K-1034 Biased FSSB-008 1 586 7,202 6,529 5 14,750 570 3,916 29.5 1.77 1.54

9/20/05 4 0.227 K-1035 Biased FSSB-008 1 605 7,037 6,364 5 14,750 570 3,751 27.3 1.69 1.54

9/20/05 4 0.227 K-1036 Biased FSSB-008 1 628 7,040 6,722 5 14,750 570 3,931 27.6 1.65 1.54

9/23/05 4 0.227 K-1040 Biased FSSB-008 1 604 4,837 4,993 5 14,545 570 2,006 14.6 1.46 1.53

9/27/05 4 0.227 K-1191 Biased FSSB-008 1 619 5,226 5,146 5 14,760 570 2,234 15.9 1.46 1.54

9/14/05 4 0.227 K-1194 Biased FSSB-008 1 778 5,307 5,034 5 15,080 570 2,155 12.2 1.16 1.55

9/12/05 4 0.227 K-1197 Biased FSSB-008 1 582 5,586 5,308 5 15,095 570 2,428 18.4 1.59 1.56

9/12/05 4 0.227 K-1198 Biased FSSB-008 1 591 5,389 5,338 5 15,095 570 2,345 17.5 1.56 1.56

9/8/05 4 0.227 K-i 199 Biased FSSB-008 1 591 6,971 6,072 5 14,875 570 3,547 26.5 1.71 1.54

9/8/05 4 0.227 K-1200 Biased FSSB-008 1 632 6,391 5,772 5 14,875 570 3,107 21.7 1.54 1.54

9/8/05 4 0.227 K-1201 Biased FSSB-008 1 602 6,921 6,347 5 14,875 570 3,659 26.8 1.69 1.54

9/8/05 4 0.227 K-1202 Biased FSSB-008 1 586 6,242 5,702 5 14,875 570 2,997 22.6 1.65 1.54

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Count Date #: pCi) No. Type Survey Unit (mrin) (g) (cpm) (cpm) (min) Counts (g) (cpm) (pCi/g) (pCi/g) (pCi/g)

11/9/05 4 0.227 K-1268 Biased FSSB-009 1 606 4,706 4,453 5 15,305 570 1,519 11.1 1.41 1.57

11/9/05 4 0.227 K-1269 Biased FSSB-009 1 570 4,767 4,608 5 15,305 570 1,627 12.6 1.52 1.57

11/18/05 8 0.224 K-1270 Biased FSSB-009 1 631 5,564 5,431 5 14,045 570 2,689 19.0 1.49 1.52

11/17/05 8 0.224 K-1292 Biased FSSB-009 1 544 5,864 5,366 5 13,825 570 2,850 23.4 1.74 1.51


11/21/05 8 0.224 K-1334 Biased FSSB-009 1 652 5,875 5,648 5 14,005 570 2,961 20.3 1.47 1.52

11/21/05 8 0.224 K-1335 Biased FSSB-009 1 681 4,150 4,251 5 14,005 570 1,400 9.17 1.22 1.52

5/25/06 8 0.224 K-1705 Biased FSS-025 1 936 2,913 2,899 5 13,670 570 172 0.820 0.745 1.50

5/25/06 8 0.224 K-1706 Biased FSS-025 1 873 2,738 2,791 5 13,670 570 31 0.156 0.781 1.50

5/25/06 8 0.224 K-1707 Biased FSS-025 1 966 3,004 3,000 5 13,670 570 268 1.24 0.732 1.505/26/06 8 0.224 K-1708 Biased FSS-025 1 597 2,828 2,908 5 13,670 570 134 1.00 1.16 1.50

4/11/06 8 0.224 K-1629 Biased FSS-026 1 744 3,056 2,969 5 13,750 569 263 1.57 0.953 1.50

4/11/06 8 0.224 K-1630 Biased FSS-026 1 747 2,907 2,971 5 13,750 569 189 1.13 0.938 1.50

4/11/06 8 0.224 K-1631 Biased FSS-026 1 699 2,757 2,919 5 13,750 569 88 0.561 0.987 1.50

3/13/06 8 0.224 K-1570 Biased FSS-027 1 933 2,809 2,885 5 13,925 570 62 0.296 0.741 1.51

3/13/06 8 0.224 K-1571 Biased FSS-027 1 658 2,812 2,858 5 13,925 570 50 0.339 1.05 1.51

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2/10/06 8 0.224 K-1508 Biased FSS-028 1 934 2,796 2,964 5 14,060 570 68 0.325 0.744 1.52

11/22/05 8 0.224 K-1136 Biased FSS-029 1 676 2,964 3,594 5 13,820 570 515 3.40 1.09 1.51

11/22/05 8 0.224 K-1137 Biased FSS-029 1 576 3,223 3,241 5 14,010 570 430 3.33 1.27 1.52

11/22/05 8 0.224 K-1138 Biased FSS-029 1 825 3,191 3,194 5 14,010 570 391 2.11 0.883 1.52

11/22/05 8 0.224 K-1139 Biased FSS-029 1 738 3,200 3,087 5 14,010 570 342 2.06 0.980 1.52

1/17/06 8 0.224 K-1432 Biased FSS-030 1 672 2,857 2,873 5 13,910 569 83 0.551 1.03 1.51

1/17/06 8 0.224 K-1433 Biased FSS-030 1 695 3,076 2,973 5 13,910 569 243 1.56 1.02 1.51

1/18/06 8 0.224 K-1434 Biased FSS-030 1 569 3,123 3,155 5 13,840 570 371 2.91 1.27 1.51

1/18/06 8 0.224 K-1435 Biased FSS-030 1 695 3,101 3,222 5 13,840 570 394 2.53 1.04 1.51

1/18/06 8 0.224 K-1436 Biased FSS-030 1 632 2,954 3,166 5 13,840 570 292 2.06 1.13 1.51

1/18/06 8 0.224 K-1437 Biased FSS-030 1 664 3,082 2,995 5 13,840 570 271 1.82 1.07 1.51

2/3/06 8 0.224 K-1493 Biased FSS-030 1 633 2,914 2,860 5 13,780 570 131 0.923 1.10 1.50

2/6/06 8 0.224 K-1494 Biased FSS-030 1 701 3,042 3,093 5 13,770 569 314 1.99 1.02 1.51

12/9/2005 8 0.224 K-1326 Biased FSSB-010 1 686 3,761 3,630 5 13,632 570 969 6.30 1.14 1.50

12/9/2005 8 0.224 K-1327 Biased FSSB-010 1 682 4,928 4,552 5 13,632 570 2,014 13.2 1.28 1.50

12/12/2005 8 0.224 K-1328 Biased FSSB-010 1 593 3,271 3,654 5 13,875 570 688 5.17 1.27 1.51

12/12/2005 8 0.224 KI-1329 Biased FSSB-010 1 574 3,813 3,730 5 13,875 570 997 7.74 1.37 1.51

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Count Date #: pCi) No. Type Survey Unit (min) (g) (cpm) (cpm) (min) Counts (g) (cpm) (pCi/g) (pCi/g) (pCi/g)12/12/2005 8 0.224 K-1330 Biased FSSB-010 1 549 3,752 3,836 5 13,875 570 1,019 8.28 1.44 1.5112/13/2005 8 0.224 K-1331 Biased FSSB-010 1 651 4,989 4,898 5 13,935 570 2,157 14.8 1.37 1.51

12/13/2005 8 0.224 K-1332 Biased FSSB-010 1 650 3,806 3,699 5 13,935 570 966 6.62 1.21 1.5112/13/2005 8 0.224 K-1365 Biased FSSB-010 1 608 3,733 3,555 5 13,935 570 857 6.29 1.27 1.5112/15/2005 8 0.224 K-1366 Biased FSSB-010 1 610 5,275 7,364 5 13,930 570 3,534 25.9 1.65 1.51

12/15/2005 8 0.224 K-1367 Biased FSSB-010 1 691 4,590 4,141 5 13,930 570 1,580 10.2 1.22 1.5112/15/2005 8 0.224 K-1368 Biased FSSB-010 1 648 4,465 4,317 5 13,930 570 1,605 11.1 1.30 1.5112/16/2005 8 0.224 K-1409 Biased FSSB-010 1 578 4,077 3,963 5 12,690 570 1,482 11.4 1.40 1.4512/16/2005 8 0.224 K-1410 Biased FSSB-010 1 584 4,149 4,106 5 12,690 570 1,590 12.2 1.40 1.4512/19/2005 8 0.224 K-1411 Biased FSSB-010 1 582 4,579 4,649 5 13,865 570 1,841 14.1 1.49 1.5112/19/2005 8 0.224 K-1412 Biased FSSB-010 1 590 4,019 4,006 5 13,865 570 1,240 9.38 1.37 1.51

2/2/2006 8 0.224 K-1490 Biased FSSB-011 1 616 4,114 4,690 5 14,130 570 1,576 11.4 1.37 1.522/4/2006 8 0.224 K-1491 Biased FSSB-011 1 600 3,595 3,831 5 13,845 570 944 7.02 1.30 1.51


2/14/2006 8 0.224 K-1544 Biased FSSB-01 1 1 550 3,696 4,127 5 13,960 570 1,120 9.09 1.46 1.51

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2/14/2006 8 0.224 K-1545 Biased FSSB-011 1 606 4,639 4,635 5 13,960 570 1,845 13.6 1.43 1.51

2/15/2006 8 0.224 K-1546 Biased FSSB-012 1 668 5,325 4,819 5 14,015 570 2,269 15.2 1.36 1.52

2/15/2006 8 0.224 K-1547 Biased FSSB-012 1 632 3,867 4,345 5 14,015 570 1,303 9.20 1.30 1.52

2/15/2006 8 0.224 K-1548 Biased FSSB-012 1 629 4,631 4,997 5 14,015 570 2,011 14.3 1.40 1.52

2/20/2006 8 0.224 K-1532 Biased FSSB-012 1 695 4,540 4,585 5 13,805 570 1,802 11.6 1.24 1.51

2/20/2006 8 0.224 K-1533 Biased FSSB-012 1 784 5,079 4,303 5 13,805 570 1,930 11.0 1.11 1.51

2/22/2006 8 0.224 K-1534 Biased FSSB-012 1 578 6,233 5,910 5 15,345 570 3,003 23.2 1.71 1.59

2/22/2006 8 0.224 K-1535 Biased FSSB-012 1 619 4,448 4,243 5 15,345 570 1,277 9.21 1.36 1.59

2/24/2006 8 0.224 K-1536 Biased FSSB-012 1 613 6,530 5,273 5 13,755 570 3,151 22.94 1.59 1.50

2/24/2006 8 0.224 K-1537 Biased FSSB-012 1 575 4,933 4,595 5 13,755 570 2,013 15.63 1.53 1.50

2/27/2006 8 0.224 K-1538 Biased FSSB-012 1 615 4,625 4,567 5 13,950 570 1,806 13.11 1.40 1.51

2/27/2006 8 0.224 K-1539 Biased FSSB-012 1 588 4,805 4,559 5 13,950 570 1,892 14.36 1.48 1.51

3/1/2006 8 0.224 K-1540 Biased FSSB-012 1 647 4,610 4,212 5 13,925 570 1,626 11.22 1.31 1.51

3/1/2006 8 0.224 K-1541 Biased FSSB-012 1 592 5,526 4,109 5 13,925 570 2,033 15.33 1.49 1.51

3/3/2006 8 0.224 K-1542 Biased FSSB-012 1 556 5,247 5,083 5 13,825 570 2,400 19.27 1.64 1.51

3/3/2006 8 0.224 K-1543 Biased FSSB-012 1 597 4,325 3,906 5 13,825 570 1,351 10.10 1.37 1.51

3/16/2006 8 0.224 K-1634 Biased FSSB-013 1 545 5,081 5,137 5 13,940 570 2,321 19.01 1.67 1.51

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(

Gross Net


Det. (cpm/ Sample Sample Time Weight Rate Top Bottom Time BKG Weight Average Th-232 Unc. MDCCount Date #: pCi) No. Type - Survey Unit (min) (g) (cpm) (cpm) (min) Counts (g) (cpm) (pCi/g) (pCi/g) (pCi/g)

3/16/2006 8 0.224 K-1635 Biased FSSB-013 1 502 4,613 4,553 5 13,940 570 1,795 15.96 1.72 1.51

3/22/2006 8 0.224 K-1638 Biased FSSB-013 1 672 6,918 5,968 5 13,475 570 3,748 24.90 1.51 1.49

3/22/2006 8 0.224 K-1639 Biased FSSB-013 1 743 6,358 4,978 5 13,475 570 2,973 17.86 1.28 1.49

3/25/2006 8 0.224 K-1621 Biased FSSB-013 1 583 4,017 4,070 5 13,975 570 1,249 9.56 1.40 1.52

3/25/2006 8 0.224 K-1622 Biased FSSB-013 1 585 4,103 3,962 5 13,975 570 1,238 9.44 1.39 1.52

3/28/2006 8 0.224 K-1623 Biased FSSB-013 1 606 4,114 4,159 5 13,685 570 1,400 10.31 1.36 1.50

3/28/2006 8 0.224 K-1624 Biased FSSB-013 1 548 4,144 3,564 5 13,685 570 1,117 9.10 1.45 1.50

3/31/2006 8 0.224 K-1625 Biased FSSB-013 1 579 4,429 4,070 5 13,845 570 1,481 11.42 1.44 1.51

3/31/2006 8 0.224 K-1626 Biased FSSB-013 1 539 4,330 4,366 5 13,845 570 1,579 13.08 1.56 1.51

4/3/2006 8 0.224 K-1627 Biased FSSB-013 1 623 5,659 5,588 5 13,990 570 2,826 20.25 1.53 1.52

4/18/2006 8 0.224 K-1680 Biased FSSB-014 1 553 4,678 5,014 5 13,810 570 2,084 16.82 1.60 1.51

4/18/2006 8 0.224 K-1681 Biased FSSB-014 1 542 5,227 5,129 5 13,810 570 2,416 19.90 1.69 1.51

4/19/2006 8 0.224 K-1682 Biased FSSB-014 1 583 5,351 5,020 5 13,350 570 2,516 19.26 1.57 1.48

4/19/2006 8 0.224 K-1683 Biased FSSB-014 1 597 5,343 5,067 5 13,350 570 2,535 18.96 1.53 1.48

4/22/2006 8 0.224 K-1684 Biased FSSB-014 1 546 4,336 4,176 5 13,534 570 1,549 12.67 1.52 1.49

4/22/2006 8 0.224 (-1685 Biased FSSB-014 1 590 4,758 4,629 5 13,534 570 1,987 15.03 1.48 1.49

4/27/2006 8 0.224 K-1689 Biased FSSB-014 1 589 6,232 5,631 5 13,535 570 3,225 24.44 1.65 1.49

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( CAppendix D, Table D-2




(7

Gross Net


Det. (cpm Sample Sample Time Weight Rate Top Bottom Time BKG Weight Average Th-232 Unc. MDCCount Date #: pCi) No. Type Survey Unit (min) (g) (cpm) (cpm) (min) Counts (g) (cpm) (pCi/g) (pCi/g) (pCi/g)

4/27/2006 8 0.224 K-1690 Biased FSSB-014 1 563 5,237 4,863 5 13,535 570 2,343 18.58 1.60 1.49

5/3/2006 8 0.224 K-1691 Biased FSSB-014 1 592 4,730 4,509 5 13,540 570 1,912 14.41 1.46 1.49

5/3/2006 8 0.224 K-1692 Biased FSSB-014 1 557 5,023 4,347 5 13,540 570 1,977 15.85 1.56 1.49

5/5/2006 8 0.224 K-1693 Biased FSSB-014 1 706 6,134 5,371 5 13,640 570 3,025 19.12 1.36 1.50

5/5/2006 8 0.224 K-1694 Biased FSSB-014 1 657 6,096 5,444 5 13,640 570 3,042 20.67 1.46 1.50

5/25/2006 8 0.224 K-1717 Biased FSSB-015 1 625 4,236 4,212 5 13,650 570 1,494 10.66 1.33 1.50

5/25/2006 8 0.224 K-1718 Biased FSSB-015 1 619 5,373 5,138 5 13,650 570 2,526 18.20 1.48 1.50

5/31/2006 8 0.224 K-1769 Biased FSSB-015 1 553 4,166 4,362 5 13,710 570 1,522 12.28 1.51 1.50

6/2/2006 8 0.224 K-1761 Biased FSSB-015 1 657 6,525 4,918 5 13,575 570 3,007 20.41 1.46 1.49

6/2/2006 8 0.224 K-1762 Biased FSSB-015 1 719 5,909 5,911 5 13,575 570 3,195 19.82 1.35 1.49

6/5/2006 8 0.224 K-1763 Biased FSSB-015 1 613 7,037 6,687 5 13,845 570 4,093 29.78 1.70 1.51

6/5/2006 8 0.224 K-1764 Biased FSSB-015 1 628 4,947 4,784 5 13,845 570 2,097 14.90 1.41 1.51

6/15/2006 8 0.244 K-1800 Biased FSSB-015 1 689 5,852 4,924 5 13,805 570 2,627 15.63 1.24 1.38

6/15/2006 8 0.244 K-1801 Biased FSSB-015 1 717 6,227 5,798 5 13,805 570 3,252 18.59 1.26 1.38

6/15/2006 8 0.244 K-1802 Biased FSSB-015 1 703 5,678 5,128 5 13,805 570 2,642 15.40 1.22 1.38

6/15/2006 8 0.244 K-1803 Biased FSSB-015 1 647 5,198 4,809 5 13,805 570 2,243 14.20 1.28 1.38

6/15/2006 8 0.244 K-1804 Biased FSSB-015 1 739 5,270 4,629 5 13,805 570 2,189 12.14 1.11 1.38

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C (11

Appendix D, Table D-2Cave Counter DataFinal Status Survey



C



Count Date #: pCi) No. Type Survey Unit (min) (g) (cpm) (cpm) (min) Counts (g) (cpm) (pCi/g) (pCi/g) (pCi/g)6/15/2006 8 0.244 K-1805 Biased FSSB-015 1 648 5,838 5,040 5 13,805 570 2,678 16.94 1.33 1.386/15/2006 8 0.244 K-1806 Biased FSSB-015 1 718 5,189 4,725 5 13,805 570 2,196 12.53 1.14 1.386/15/2006 8 0.244 K-1807 Biased FSSB-015 1 664 3,335 3,425 5 13,805 570 619 3.82 1.03 1.386/15/2006 8 0.244 K-1808 Biased FSSB-015 1 697 3,379 3,375 5 13,805 570 616 3.62 0.99 1.38

6/27/2006 8 0.244 K-1878 Biased FSSB-015 1 727 3,715 3,358 5 13,775 570 782 4.41 0.96 1.386/27/2006 8 0.244 K-1879 Biased FSSB-015 1 596 5,064 4,590 5 13,775 570 2,072 14.25 1.36 1.38

6/27/2006 8 0.244 K-1880 Biased FSSB-015 1 742 3,582 3,213 5 13,775 570 643 3.55 0.93 1.386/27/2006 8 0.244 K-1881 Biased FSSB-015 1 786 3,240 3,127 5 13,775 570 429 2.23 0.85 1.386/27/2006 8 0.244 K-1882 Biased FSSB-015 1 764 3,368 3,233 5 13,775 570 546 2.93 0.89 1.386/27/2006 8 0.244. K-1883 Biased FSSB-015 1 705 3,372 3,430 5 13,775 570 646 3.76 0.98 1.386/27/2006 8 0.244 K-1884 Biased FSSB-015 1 696 3,165 3,498 5 13,775 570 577 3.39 0.98 1.38


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Kaiser On-site Cave CounterLudlum 2221/44-10 (NaI # 4) Calibration

Serial Number: 172053/PR206815December 13, 2004

The following documents the calibration of the Kaiser On-site Cave Counter (thecounter) located on the Kaiser Aluminum and Chemical Company Tulsa Oklahoma site.The cave counter was equipped with Detector Number 4.

BackgroundThe Kaiser On-site Cave Counter (the counter) consists of a 2-inch by 2-inch sodiumiodide Ludlum Model 44-10 detector coupled with a Ludlum Model 2221Scaler/Ratemeter instrument, mounted inside a shielded box with room for a standard soil-sample container to be placed on the face (bottom, non-wire connecting end) of thedetector. Four detectors have been used. The four detectors are numbered Nal #1, Nal #

•2, Nal # 3 and Na! # 4. The detectors have been calibrated by Ludlum in the past yearusing a Cs-137 source to verify their response to high energy photons. The detectors,including their use as part of the counter, are used to obtain gross gamma readings from-soil samples in units of counts per minute (cpm). Although the response of a Nal detectorto gamma is energy dependent, the gammaenergy of a Cs-137 source and the averagegamma energy of Thorium 232 (Th-232) in equilibrium with progeny are relatively close,so the difference in response is not considered in the calibration of the counter to screensamples for Th-232 activity concentration. This documents the calibration of Na # 4.

Calibration Standard - Outreach LabsSamples of material used to calibrate the counter are analyzed by Outreach Labs ofBroken Arrow; Oklahoma. Outreach analyzes the samples for Th-232 activityconcentration in units of pico-Curies per gram (pCi/g) based on the Ac-228 gamma line.Outreach maintains a National Institute of Technology (NIST) traceable calibration oftheir gamma spectroscopy systems including daily quality control (QC) checks of thecurrent calibration, and their analyses represent the primary standard for the countercalibration.

Secondary Calibration StandardCalibration of the counter consisted of 20 counts of the secondary calibration standard,Sample K-430. Sample K-430 is a composite sample of Kaiser Site Pile L-003. Pile L-003 is a homogeneous stockpile of site soil like material'of approximately 91 tons. Thematerial has been well mixed and has had two separate sets of equal-distant samplestaken and analyzed to properly characterize the material prior to using the material torecalibrate another onsite counting system (SMCM). The pile was characterized on twoseparate dates by taking a set of equal distant samples and analyzing the samples for Th-232 activity concentration. In addition to the equal-distant samples, a composite sample(K-430) was taken and analyzed by Outreach Labs. The result was 21.5 pCi/g Th-232.

.J

* Na! It 4 CalibrationSample K-430 was used to calibrate the counter (Nal #.4). On December 2 ahd 3, 2004,counts of background and the top and bottom of Sample K-430 were performed using thecave counter and NaI # 4, a total of twenty times. The sample was also weighted (ingrams) each time counted. The results are presented in Table 4.

Table 4 - Detector 4 Calibration Count Results

5 min I rin I minCave Weight Background Top Screen Bottom

Count t (grams) (cpm) (cpm) Screen (cpm)

1 684 2,995- 6,785 5,967

2 684 2,995 6,328 6,363

3 684 2,995. 6,685 6,193

4 683 2,995 6,638 6,144

5 684 2,995 6,652 6,111

6 683 2,995 6,450 6,038

7 684 2,995 6,705 5,982.

.8 684 2,995 6,540 5,983

9 684 2,995 6,726 5,965

10 684 2,995 6,605 5,875

11 684 3,048 6,367 6,221

12 684 3,048 6,644 6,189

13 684 3,048 6,493 * 6,068

14 684 3,048 6,626 5,977

15 684 3,048 6,758 6,304

16 "683 3,048 - 6,845 6,026

17 684 3,048 6,635 6,111

18 683 3,048 6,638 6,200

19 683 3,048 6,763 5,993

20 683 3,048 6,411 6,249

The following calculations were then performed for each count:I The net top count rate was calculated (ncpm).

* The net bottom count rate was calculated (ncpm).* The average (top and bottom) net count rate was calculated (nepm).

* The total pCi in the sample was calculated by multiplying the Outreach activityconcentration result for Sample K-430 (21 pCi/g) by the weight (grams) measuredfor the sample (pCi).

* The calibration factor in units of pCi/ncpm was calculated by dividing the totalpCi for the sample count by the ncpm (average of the top and bottom counts).

The results are presented in Table 5.

Table 5 - Calibration Factor CalibrationI min Cal

.Cave Average Total FactorCount # (ncpm) pCi (pCi/ncpm)

1 3,381 14,706 4.35

- 2 3,351 14,706 4.39

3 3,444 14,706 4.27

4 3,396 14,685 4.32

5 3,387 14,706 4.34

6 3,249 14,685 •4.52

7 ' 3,349 14,706 4.39

8 3,267 14,706 . 4.50

9 3,351 14,706 4.39

10 3,245. 14,706 4.53

11 3,246 14,706 4.53

12 3,369 14,706 4.37

13. 3,233 14,706 4.55

14 3,254 14,706 4.52

15 3,483 14,7Q6 4.22

16 3,388 14,685 4.33

17 3,325. 14,706 4.42

18 3,371 14,685 4.36

19 3,330 14,685 4.41.

20 3,282 14,685 4.47

Average: 3,335 14,700 4.41

Std. Dev.: 71 10 0.09

Minimum: 3,233 14,685 4.22

Maximum: 3,483 14,706 4.55

Median: 3,350 14,706 4.39

Range: 3.5 2.1 3.5

%CV: 2 0.1 2

The average calibration factor of 4.41 pCilnepm can be used to covert the average netcount rate of cave counts to activity concentration in'units of pCi/g, as follows:

Th-232 (pCi/g) = Average net cpm x CF of 4.41 pCi/ncpm / sample weight (grams)

Use of this calibration factor is good for one calendar year (December 3, 2004 throughDecember 2, 2005). Counts of.sample K-430 will be performed as daily QC checks ondays when the counter is in service. Acceptance criteria based on the average .of at least10 counts of sample K-430 plus/minus 3 standard deviations will be established. DailyQC counts that fall outside of this range should be repeated. If the repeat count fails, aninvestigation should be performed and recalibration maybe necessary.

ON-SITE CAVE CO NTEPRNal 0 4 CAMfIRATION CERTIFICATE

Calibration Date:

Calibration Due;

DeccMber 3_and 4. 2004

D ccmbex 3, 2005

Calibration Soure: Sample K-430

Source Activity Concentration: Sample K-430 was counted by Outeach Labs of BrokenArrow, Oklahoma and determined to be 21.5 pCi/g of Th-232. Outrcach Labs analyzedthe sample via gamma speotroscopy using a counting system with National Institute ofTbchmology (NISI) tmrcablo calibration and Quality Control (QC) program.

C-ave Counter Nal i 4 Configuration: Detetor Nal #4 was positioned in the standardcount geometry with in the- hiod. All calibtation counts were performed in the samwgeometry.

- CalibraionFacwr: 4.ALvi/nM (4.41 pCi ofTh-232 per no count per Wnut)

Calibtation Performed By: David Woyant and Danel Baker

Calbration Approved By:

Andrew J. Lombardo, CFP

Debcbr ;3t2004

Kaiser On-site Cave CounterLudlum 2221/44-10 (Nal # 8) Calibration

Serial Number: 216513/PR230093November 14, 2005

The following documents the calibration of the Kaiser On-site Cave Counter (thecounter) located on the Kaiser Aluminum and Chemical Company Tulsa Oklahoma site.The cave counter was equipped with Detector Number 8.

BackgroundThe Kaiser On-site Cave Counter (the counter) consists of a 2-inch by 2-inch sodiumiodide Ludlum Model 44-10 detector coupled with a Ludlum Model 2221Scaler/Ratemeter instrument, mounted inside a shielded box with room for a standard soilsample container to be placed on the face (bottom, non-wire connecting end) of thedetector. Four detectors have been used. The four detectors are numbered Nal #1, Nal #2, Nal # 3 and NaI # 4. All detectors have been' calibrated by Ludlum in the past year anda Cs-137 source has been used to verify their response to high energy photons. Thedetectors, including their use as part of the counter, are used to obtain gross gammareadings from soil samples in units of counts per minute (cpm). Although the response ofa Nal detector to gamma is energy dependent, the gamma energy of a Cs-137 source andthe average gamma energy of Thorium 232 (Th-232) in equilibrium with progeny arerelatively close, so the difference in response is not considered in the calibration of the-counter to screen samples for Th-232 activity concentration. This documents thecalibration of Na # 8.

Calibration Standard - Outreach LabsSamples of material used to calibrate the counter are analyzed by Outreach Labs ofBroken Arrow, Oklahoma. Outreach analyzes the samples for Th-232 activityconcentration in units of pico-Curies per gram (pCi/g) based on the Ac-228 gamma line.Outreach maintains a National Institute of Technology (NIST) traceable calibration oftheir gamma spectroscopy systems including daily quality control (QC) checks of thecurrent calibration, and their analyses represent the primary standard for the countercalibration.

Secondary Calibration StandardCalibration of the counter consisted of 20 counts of the secondary calibration standard,Sample K-1257. Sample K-1257 is a composite sample of Kaiser Site-Pile L-003. Pile L-003 is a homogeneous stockpile of site soil like material of approximately 30 tons. Thematerial has been well mixed and has had a set of nine equal-distant samples taken andanalyzed to properly characterize the material prior .to using the material to recalibrate.another onsite counting system (SMCM). The pile was characterized last year on twoseparate dates by taking a set of equal distant samples and analyzing the samples for Th-232 activity concentration. In addition to the equal-distant samples, a composite sample(K-1257) was taken and analyzed by Outreach Labs. The result was 19.2 pCi/g Th-232.

Nal # 8 CalibrationSample K-1257 was used to calibrate the counter (Na! # 8). On November 3, 2005,counts of background and the top and bottom of Sample K-1257. were perfoe rmed using

-the cave counter and NaI # 8, a total of twenty times. The sample was also weighted (ingrams) each time counted. The results are presented in Table 4.

Table 4 - Detector 8 Calibration Count Results

.Cave WeighCount # (grims

5rmint. Background

(Cpm)

mrinTop Screen

(cpm)Bottom Screen

(cpm)

1

2

3'

4

5

6

7

8

9

10

11

12

13

14

15

.16

17

18

19

20

672

672

672

672

.672

673

673

673

* 673

673

673

673

673

673-

673

673

673

673

673

673

2,760 5,985

2,760 .6,038

2,760 5,925

2,760 5,790

2,760 5,713

2,762 6,008

2,762 5,844

2,762 6,107

2,762 5,885

2,762 5,897

2,759 5,977

2,759 6,000

2,759 5,854

2,759 5,890

2,759 5,844

2,745 5,963

2,745 5,993

2,745 6,026

2,745 6,026

2,745 6,031

5,152

5,122

5,272

5,365

5,287

5,512

5,488

5,516

5,399

5,418

5,340

5,443

5,333

5,347

5,412

5,525

5,266

5,408

5,413

5,394

The following calculations were then performed for each count:* The net top count rate was calculated (ncpm).* The net bottom count rate was calculated (ncpm).

* The average (top and bottom) net count rate was calculated (ncpm)." The total pCi in the sample was calculated by multiplying the Outreach activity

concentration result for Sample K-1257 (19.2 pCi/g) by the weight (grams)measured for the sample (pCi).

" The calibiation factor in units of pCi/ncpm was calculated by dividing the totalpCi for the sample count by the ncpm (average of the top and bottom counts).

The results are presented in Table 5.

Table 5 - Calibration Factor Calibration1 min Cal

Cave Average Total FactorCount # (ncpm) pCi (pCi/ncpm)

1 2,808 12,902 4.59

2 2,820 12,902 4.58

3 2,838 12,902 4.55

4 2,817 12,902 4.58

5 /2,740 12,902 4.71

6 2,998 12,922 4.31

7 2,904 12,922 4.458 3,050 12,922 4.24

9 2,880 12,922 4.49

10. 2,896 12,922 4.46

11 2,900 12,922 4.46

12 2,963 12,922 4.36

13 2,835 12,922 4.56

14 2,860 12,922 4.52.

15 2,869 12,922 4.50

16 2,999 12,922 4.31

17 2,885 12,922 4.48

18 2,972 12,922 4.35

19 2,975 12,922 4.34

20 2,968 12,922 4.35

Average: 2898.6 12,917 4.46

Stdev.: 79.38 8.53 0.12

Minimum: 2739.7 12,902 4.24

Maximum: 3049.5 12,922 4.71

Median: 2890.0 * 12,922 4.47

* Range: 3.90 2.25 3.93

%CV: 2.74 0.07 2.69

The average calibration factor of 4.46 pCilncprm can be used to covert the average netcount rate of cave counts to activity concentration in units of pCi/g, as follows:

Th-232 (pCifg) = Average net cpm x CF of 4.46 pCi/ncpm / sample weight (grams)

Use of this calibration factor is good for one calendar year (November 3, 2005 throughNovember 3, 2006). Counts of sample K-1257 will be performed as daily QC checks ondays when the counter is in service. Acceptance criteria based on the average of at least10 counts of sample K-1257 plus/minus 3 standard deviations will be established. DailyQC counts that fall outside of this range should be repeated. If the repeat count fails, aninvestigation should be performed and recalibration may be necessary.

ON-SiTE CAVE COUNTER N0 # 4 CALIBRATION CERTIFICATE

-Calibration Doce: N~~1q3 2005

CalibrationDlte: -Novembr3.200_

CalIbration Source: Sample K- 257

Source Activity Conocnutxtion: Sample K-1257 was counted by Outreach Labs of BrokenArrow, Oklahoma and dct=Imd to be 19.2 pci/g of Th-232. Outreach Labs anlyz=dthe sample via gamma spoctoscopy using a counting system with. National Institute ofTechnology (,IST) traebIe calh'bration and Quality Control (QC) program.

Cave Counter Nal # 8 Configuration: Detector Na fi8 was positioned in the Vtadardcount geotnetry with in the shieldL All calibration counts were performed in the samegeometry.

CalibtationFavotor 4A.6 yi/n (4.46 pli of Th-232 per net cotmt per minute)

Calibration Performed By: David Wymt

Calibration Approved By: 7 November 14,2005'

'Andrew J. Lombardo, CHP

(