Text

Decontamination of Selected Ga Co Science Labs for Release to Unrestricted Use (Group 4)
	ML20248F085
Person / Time
Site:	07000734
Issue date:	09/12/1989
From:	; GENERAL ATOMICS (FORMERLY GA TECHNOLOGIES, INC./GENER
To:	;
Shared Package
ML20248C689	List: ML20248C688; ML20248F085;
References
	NUDOCS 8910060210
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rwnrrMINATIN T mrFIED GElNE:RAL A'IIMICS' SCII!1CE IABGuntRIES ETR RE2ASE

'ID IEEES'IRICIED USE (Group f},

SEPTEMBER 12, 1989 m

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TABLE _OF CONTENTS Page LIST OF ATTACHMENTS....................................... i INTRODUCTION............................................. 1 SITE DESCRIPTION.......................................... 2 CRITERIA FOR RELEASE 'IO UNRESTRICTED USE.................. 3 INSTRUMENTATION AND MEASUREMENT LIMITS FOR RELEASE........ 3 PREVIOUS LABORATORY ACTIVITIES AND EFFORT OF DECONTAMINATION REgu.ue u........................... 5 FINAL RADIATION SURVEYS...................................

7 FINAL CONTAMINATION SURVEYS............................... 8 CCt@LIANCE WITH THE TARGET CRITERIA.......................

9 CONCLUSION................................................ 9 l

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LIST OF ATI'ACHMENTS Att eh = nt 1:

Plan View of Site Attehe nt 2:

L Building Ccuplex (Building 2) :

Selected Science Labs (Group 4) to be Released to Unrestricted Use Attehent 4A:

Table I Guidelines for Release of Equipnent and Facilities to Unrestricted Use (NRC) B:

Table I Guidelines for Release of Equipnent and Facilities to Unrestricted Use (State of California Decon-1) :

Final ParHation Survey of Lab 317 and Mezzanine above Lab 317 Atte h= nt 6:

Final Survey of Walls of Iab 317 Atte hent 7:

Final Survey of Ccunbined Iabs 355/357 Att eh e nt 8:

Final Survey of Walls of Cambined Labs 355/357 :

Initial Survey of Ccubined Labs 359/361 A:

Final Survey of Cambined Labs 359/361 Atte h= nt 10:

Initial Survey of Walls of Cambined Labs 359/361

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Atte h=nt 10A: Final Survey of Walls of Cambined Labs 359/361 Atte h=nt 11:

Final Survey of Mezzanines above Ccrubined Iabs 359/361 Atteh=nt 12:

Final Survey of Combined Labs 554/556/558/560 3:

Final Survey of Walls of Combined Labs 554/556 Atte h e nt 13A: Final Survey of Walls of Lab 558 Att e h = nt 13B: Final Survey of Walls of Lab 560 4:

Final Survey of Cambined Iabs 562/564 Attehent 15:

Final Survey of Walls of Combined Labs 562/564 Attehmnt 16:

Contamination Survey Results for Iab 317 (Floor and Walls) and Mezzanine above Lab 317 (1 page) 7:

Contamination Survey Results for Labs 355/357 and 359/361 and Mezzanines above Labs 359/361 (2 pages) 8:

Contamination Su m y Results for Labs 554/556/558/560 (2 pages)

Atteh=nt 19:

Contamination Survey Results for Labs 562/564 (1 page) i

1 INTROIXCTICN General Atcmics has been involved in the process of decontaminating

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and obtaining the release to unrestricted use of selected laboratories and associated offices in GA's Building 2 (also known as the Science Laboratories Building or "L" Building). Thirty-eight (38) such laboratories were released in 1988 in two groups designated as " Group 1" and " Group 2".

Group 1 involved the release of twenty-five (25) laboratories and Group 2 involved the release of thirteen (13) laboratories.

In Decteder 1988, GA requested the release of another group of labs and associated offices designated as " Group 3".

This group consists of seventeen (17) laboratories; including laboratory 315 and roams 1 and 2 of laboratory 309 which were added as an addendum to the Group 3 final report. Taelve (12) of these laboratories had mezzanines and nine (9) other mezzanines were located above laboratories which were not requested to be released. These later laboratories are currently occupied, however, none of the activities in these laboratories involve the use of rMiretive material. Group 3 laboratories were released to unrestricted use in 1989.

GA has recently decontaminated another group of laboratories in Building 2.

GA has no plans for conducting any future activities involving radioactive materials in these laboratories and/or mezzanines designated as " Group 4".

The offices across the hall frcm these laboratories have never been used for work involving radioactive materials. Accordingly, GA is requesting a confirmatory survey of these laboratories and mezzanines and their associated offices in support of their release to unrestricted use.

The 11 laboratories (3 have mezzanines) in " Group 4" consist of a total area of about 3749 ft to be released to unrestricted use. A brief history of the use of these laboratories is provided.

The primary radionuclides previously used in these laboratories were depleted, natural and enriched uranium, thorium, tritium and other fission products. Most of the laboratories did not require decontamination beyond

the removal / decontamination of sources and contaminated equipnent (including glove boxes, hoods, filter plenums and associated ducting).

Five (5) small areas of contamination were identified in these labs; two areas on the floor and two areas on the southeast wall of cambined labs 2

359/361 and one small, i.e. less than 100 cn, area on the floor in laboratory 556. Each of these areas were decontaminated to levels well below the relecse criteria.

GA has decontaminated equipnent and facilities consistent with the State of California's and U. S. Nuclear Regulatory Camu.ssion's guidelines for Release of Facilities and Equipnent to Unrestricted Use. The results of the final radiation and contamination surveys are included in this report to demonstrate compliance with the guidelines.

SITE DESCRIPTICH The location of Building 2 with respect to other facilities on the GA Site is shown in Attachment 1.

A layout of Building 2 is shown in.

The building is divided into three Laboratory sections; Laboratory B, C, and A.

Iaboratory B includes offices and laboratories fram 102 through 243. Laboratory C includes offices and laboratories fran 300 through 445 and Laboratory A includes offices and laboratories from 502 through 651. The laboratories and mezzanines in the Group 4 laboratories to be released to unrestricted use are located in two of the laboratory sections (Sections C and A) as shown in Attachment 3.

Group 4 laboratories consist of a total of eleven (11) laboratories (3 with mezzanines). These labs and mezzanines are: Iab 317 (and the mezzanine above the lab), cambined lab 355/357 (no rezzanine), cambined lab 359/361 (with a mezzanine above the labs), cambined lab 554/556/558/560 (no mezzanine), and caabined lab 562/564 (no mezzanine). The approximate area in ft is prenented below:

2 Laboratory / Mezzanine Acoroxirate f_t Lab 317 288 Mezzanine above Lab 317 112 2

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w_______-____-______

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k Labs 355/357 (Ccubined Lab) 576 Labs 359/361 -(Ccrobined Iabs).

576 Mezzanines above labs 359/361 385 Iabs 554/556/558/5G0 (Canbined Iab without a mezzanine) 1152 Labs 562/564 (rrmbinM1 lab without a mezzanine) 660

'IUI'ALS 3749 CRITERIA POR RELEASE p_ UNRESTRICTED USE Table I (AMebnt 4A) is taken from USNRC's criteria for releasing ~

fe414 ties and egninnant t.o unrestricted use. It has been incorporated into our SNM-696 license.- The State of california's limits for release of facilities and equipment to unrestricted use are identical to these limits for the radionuclides of concern (pra+=inmitly U-238, Cs-137, U-235 and Co-60).. These guidelines, "DHS Criteria for Release of Facilities and Equipnent to Unrestricted Use," are also known as "DECCN-1" are suntnarized in Table I (Attachment 4B). GA has decontaminated the laboratories and mezzanines to levels below these guidelines.

INSTRUMENTATION AND MEASUREMENT LIMITS FOR RELEASE Instrumentation

1.. Beta /ganma counters - Model TBM-28 and Model TBM-15 geiger counters manufactured by Technical Associates were used to survey surfaces for beta /ganma contamination. The instruments contain a pancake Geiger-Mueller (GM) detector which has a window thickness of less than 2

7 mg/cm. The instrument has three ranges covering from 0-50,000 counts per minute (cpm). The inoi.a.wents are cr.librated semiannually uning a Cs-137 standard or a pulser.

2.

Alpha counters - Model 12 rate meters with Model 43-44 air pwportional alpha probes manufactured by Ludlum Measurements Inc.

were used to survey for alpha contamination. The instrument has four 3

,o ranges covering frczn 0-500,000 counts per minute. Alpha counters are calibrated se:niannually using an alpha source traceable to NBS.

3.

Ganna Detectors - Model 19 microR meters with NaI scintillation detectors manufactured by Ludlum Measurements Inc. were used. in all locations. The in=L.er_nt has three ranges frczn 0 - 5 mR/hr. The microR meters are normally returned to the manufacturer for calibration annually. Gar:ma spectral analyris on selected samples were performed using a high purity germanium detector manufactured by Canberra Industries, Inc.

4.

Iow level Alpha / Beta counting systems manufactured by Canberra were used to analy::e wipe samples.

The alpha / beta systems and the germanium detector system have been calibrated for various types of samples. This calibration is checked on a daily or weekly basis depending on usage.

Measurement Limits for Release The final survey results have been converted from cpn (counts per 2

minute) for a particular detector to dpn/100 cm. Detector " background" cpn are subtracted frczn measured readings. The values are then corrected for efficiency and geanetric factors associated with the instrumentation.

1.

Backcround A " standard" natural background was dete.rmined for each instrument and subtracted frcrn the survey readings. The surface beta / gar:ma readings were ccupleted using the TBM Model 28 and Model 15 GM counters which have a background concrete reading of about 89 plus or minus 20 counts per minute.

2.

Efficiency l

NBS traceable standards were used to calibrate instruments for various efficiencies. The standards consist of concrete blocks (one for each radionuclides) having an area of approximately 25 cm x 25 cm spiked with an NBS traceable standard liquid solution of the specific 1

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i; radionuclides i.e. Cs-137, 93% enriched uranium, depleted uranium and-

' thorium. ' ids maximum allowable level is 15,000 dpn for. an area less.

than 100 ch and the average allowable level for an a 1 meter by'l meter or less is 5000 dpa/100 cn (Attachments 4A and *d).

Surface measurements of the blocks were obtained with'the instruments and percent efficiencies were obtained. The readings were corrected for efficiency by multiplying by the appropriate correction factor.

3.

GecacL./ Correction 2

'Ihe acceptable values listed in Table 1 are in dpn/100 cr, therefore,

'a correction factor was applied to the measured values to correct for the smaller area of the detector. The Model TBM-28 and Model TBM-15 (geige-Santers) have a 5 cm diameter detxtor which abssures a 19.6 2

The rearHng is therefore coucc.ed by multiplying by 5.1.

.cm ares.

The alpha detectors used for the surveys "see", at any given time, an 2

area of about 78.7 on, which then requires a correction factor of 1.27.

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PREVIOUS LABORA'IORY ACTIVITIES AND EFFDRT OF, DEO:NTAMINATICH REQUIRED A brief description of the previous use of the 11 laboratories (and the 3 mezzanines) over the past approximately 20 years is provided below.

Since not all our records were reviewed, it was assumed that radioactive materials could have been used in each of the Inboratories.

Information is also provided below on the results of initial curveys and on the work involved in cleaning these labs.

Tahrwatory 317 (and the -miw above T3J -aL.ay 317)

. Laboratory 317 was used fran at least 11/25/74 to 11/25/75 (NA #2059) for adsorption isotherm studies using pseudo-isopiestic techniques. Ten millicuries (10 nci) of each of the following isotopes were used; Cs-137, I-131, Ag-110, and Te-127. Records after 1975 indicate that these labs were no longer used for these type of studies. Surveys using geiger counters, alpha counters and microR neters showed no contamination on the 5

- l, floor (tiled), drains or walls of the laboratory or the mercanine. The tile was removed and the concrete underneath the tile was also surveyed; no contamination was detected.

TM-- aimles 355/357 (rywhinad lab without a -"im) and Ta-W

!aa 359/361 and the Me m nines above Labs 359/361 Health Physics records show that work in these laboratories with radiw-tive materials began as early as 12/17/68 ( R #1361). The work involved " capsule instrumentation and encapsulation outgasing" using various enrichments of U-235 with a 500 gram limit.

These labs were used again frcan at least 8/13/75 (m#2116) until around 4/85

( R #2641). The work originally began in 1975, was for fuel kernel development and fuel coating development. Studies of diffusion of tritium through H'IGR steam generator materials also was conducted in these labs.

The labs were originally authorized for 350 grams of U-235 (there is also a notation in the records that as nuch as 3 kg's of U-235 may have been authorized), 20 kg's of U-238, 50 kg's of Th-232 and 2.1 Curies of H-3 to conduct these studies.

Since 1985, no work with radi = tive materials has been conducted in these labs. Laboratories 355/357 had a contaminated hood and glove box. These items as well as other equipnent in the laboratory which were found to be x ntaminated were transferred to another facility to be decontaminated or disposed of as radinae3tive waste. No contamination was detected on the floor (tiled) in this laboratory. The floor tiles were removed and the 2

concrete underneath was surveyed. Two " spots", i.e. less than 100 cm, were found to be contaminated on the concrete floor; the cont minant was identified as thorium. One spot measured ~2000-3000 counts per minute (c;xn) beta /gama and about 50 cpn alpha. The other spot measured about 140 cpm beta /ganma and 50 cpm alpha before being decontaminated. Attehmnt 9 provides the results of the initial survey of the floor areas. During the survey of the walls of ccr:bined laboratory 359/361, two small areas were found to be slightly contaminated. The cont minant was also identified as thorium. The initial survey is provided in Att ehmnt 10.

One area (~100 6

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2 cm ) measured about 1000 cpn beta /gama and about 50 cpn alpha. The other 2

area '(~ 1 ft ) measured about 600 cpn beta /gama and about 50 cpn alpha.

The concrete floor areas and the wall surfaces were cleaned /scabbled until the levels were at normal background levels i.e. well below the allowable release criteria.

TM - ai les 554/556/558/560 (&=hinari Iab without a serranine)

Several Work Authorizations were issued for work in these labs over the years. Frcan at least 1975 - 1979 (hWs 2062..

2309), work involving the

.use of tritium was authorized in these laboratories. For the past several years, the lab had been used for non-radioactive work involving stress testing of ccanponents. Surveys using geiger counters, alpha counters and microR meters in the laboratories and mezzanines showed only one small

" spot" of contamination. The " spot" was in Lab 556; the contamination levels were ~300 cpn (beta /ganma) and ~250 cpn (alpha). The surface was cleaned to meet release criteria. Ganma spw.uscopy measurements identified the contaminant as U-235.

No other contamination was detected on the floors or walls of these labs.

TA. :

Ia= 562/564 (rywhinari lab without a newrariine)

No evidence of work involving radioactive materials could be found during a review of the records over the past 20 years. The lab had been used until recently as a welding develognent lab. Surveys using geiger counters, alpha counters and microR meters in the laboratories and mezzanines showed no contamination on the floors or walls of these laboratories.

FINAL RADIATION SURVEYS Final surveys of all laboratories and associated mezzanines were conducted using the Model TBM-28 and Model TBM-15 geiger counters. The results of these surveys are shown in the attehmants as described below.

2 The measurements of average contamination were averaged over 1 meter and 2

are given in dpn/100 cm. The maximum contamination level applies to an 2

area of not more than 100 an,

7

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Final Radiation Survey of Lab 317 and Mezzanine above lab 317 :

Final Survey of Walls (First Floor) of Lab 317 :

Final Survey of Cambined Labs 355/357 :

Final Survey of Walls of CernhinM Labs 355/357 A:

Final Survey of Cambined Labs 359/361 Attachnent 10A: Final Survey of Walls of Cambined Labs 359/361 1:

Final Survey of Mezzanines above Cambined Labs 359/361 2:

Final Survey of Combined Labs 554/556/558/560 3:

Final Survey of Walls of Cambined Labs 554/556 3A: Final Survey of Walls of Lab 558 Attar b nt 13B: Final Survey of Walls of Lab 560 4:

Final Survey of Cambined Labs 562/564 Attar b nt 15:

Final Survey of Walls of Cmbined Labs 562/564 A microR meter was also used to survey the laboratories and to measure floor radiation levels; results are provided in the attachments described above. These levels were all within normal background levels.

Very low alpha (less than 300 cpn) contamination levels were detected in the five (5) areas identified as requiring decontamination in cmbined lab 359/361 (two floor areas and two wall areas) and lab 556 (one floor area).

These areas were decontaminated to natural background alpha levels i.e.

neasured alpha levels after decontamination were undetectable.

FINAL CatfI'AMINATTON SURVEYS Table 1 (Attachments 4A and 4B) provides limits for acceptable removable surface contamination le/els. Contamination surveys (wipes) were conducted although no removable contamination was suspected i.e. the labs had not been used for several years and no fixed contamination was detected. The wipes were collected on the floors and the walls of the laboratories. The wipe sample locations are shown in the attachments described above and the results are shown in Atre b nts 16 through 19 as described below.

8

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l Att e b nt 16:

Contamination Survey Results for Lab 317 and Mezzanine above Lab 317 (1 page) 7:

Contamination Survey Results for Labs 355/357 and 359/361 and Mezzanine above labs 359/361 (2 pages) 1 8:

Contamination Surrey Results for Labs 554/556/558/560, (2 pages)

Actachment 19:

Contamination Survey Results for Labs 562/564 (1 page) 2 The contamination levels in every location were ( 20 dpn/100 cm area, and well below the Table 1 limits (Attachments 4A and 4B) for renovable contamination.

CCEPLIANCE WITH THE TARGET CRITERIA The laboratories were cleared of all radioactive materials and contaminated equipnent.

All floors, walls and concrete surfaces were surveyed and found to be below the release levels specified in Table 1 (Attachments 4A and 4B).

The final surveys provided in this report denenstrate compliance with the criteria for release to unrestricted use.

COtCLUSICN Final contamination and radiation surveys provided in this report for the 11 laboratories (3 of which have mezzmines) designated as " Group 4" deonstrate that the levels meet the approved guidelines for release to unrestricted use.

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otiod ao C

3p 2a1 e-ro re ng trc ae a mlr n mns A

2 p-SU e rSv o-oa h

t ei e n a m

T y

a,1 tso o ca scf ft n rfto dda Ua H

te tb t

i o,

o a

y nlr T

c 8, 24 id n pa ee h yc c

f y m nl aug A

,e E5 32 mooe cb tbi sa or ol oi 5d s22 223 e mi cd a

r te m d ei a ehl 3

c1 3

sxe fd ndt nr u t vtn gsl 2d ih-h a1 a ys et rn iee ea m nhiao a i a

e nT1 TR-mai o ua nm m i u t t ni rsm S

Ut a

,1 mcm)n s

dio ee x oi cit er E

a r,

aeen eme rc a mwamr ve7 D

l u07 t3, gd os ea srg ua m a oao at I

tc s32 a21 alr rh ue sf ait p tn L

ao n22 n23 ahhse ep td ar e eedno eia C

ns a- -

1 tt psh hl sen eu h hraor h mh U

s rhc ha-eilit Wa Ada Ms T Tarcp T et N

Ua TTA TR1 Bwafo a

b c

d

I

l liliI!!

jI ll

= ATTACHMENT 4B

.c.

ABLEI l

ACEPTABLE SUFFAE CONTAMINATION LP_El.S1/W

~

IUCLIE" AVtRAC#,*

FAXIM N d E70/ABLE

b 2

(dpm/100 cm')

- (dpm/100 cm )

(dpm/100 c=2)

. a ) ~ U-na t, U-235, U-238, and 5,000 15,000 1,000 ccrociated decay products b) Trcnsuranics, Ra-226, Ra-228, 100 300 20 Th-230, Th-228, Pa-231 Ac-227, I-122, I-170

) Th-nac, Th-232, Sr-90 1,000 3,000-200 Ra-2 2 3, Ra-2 2 4, U-232, I-126, I-131, I-133 i) Data-gac.na emitters (nuclides 5,000 15,000 1,000 with decay modes other than alpha emission or spontaneous fission) except Sr-90 and othars noted above.

e)

H-3, C-14 excep: as ONA 20,000 60,000 4.000

-crscurscrs _f./

where su: face contamina:Lon by both alpha-and beca-gamma-emit:ing nuclides exis::, :ne li= :

established i:: alpna-and beca-ga=ns-emi::ing nuclides should apply inde;enden: y.

'.2 used in :his cable, dpm (disin:eg:ations per minu:e) means :he :a:e ci emission by radicac ::

a:erial as dece:=ined by cc::ec:ing the c:en:s pe: zinu:e cbserved bu en app::p:ia:e derec ::

'!:: backg::und, e!!iciency, and gecme::ic fac:::: ass: cia:ed wi:h :ne ins : :en a:i::.

Measurements of average concaninan: :hould nc: he averaged ove: =cre :han i square me:er.

I::

bfects of less su: face a:ea, :he average shocid be derived !:: each sucn :::ec:.

'The maximum con =aminacien level applies := an area of no more :han 100 cm.

' 'ha a mo un of removable :adicac::ve mater:al.ce: 100 c=

of su:! ace area should be de e:=====

y wiping tha t area vi:n dry filter or sof: coscrben: paper, applying mcderace Pres 3 :* *

G=.

sssessing the amount of radicac:ive material cn the wipe wi:n an appropriate ins := men; 5 kn="'*

e!!iciency.

When removable contamination en objects of less surface a:ea is dece:=ined* ;ne pe::inen levels shculd be : educed p:cporricnally and the entire su: face shculd be wiped.

nA precursors mean molecules. or compounds that are di:ectly incorpora:ed into che :NA molecule during DNA biosynthesis, e.g.

pu:ine and pyrimidine bases and their analogs, nucleotides and n ucl e'osides.

The acceptable su:! ace contandnation levels !c: H-3 and C-14 in DNA precurscrs a:e as tabulated in paragrapn (d) for beta-gamma-emitters.

~ USNRC Regulatory Guide 1.86 Termination of Operatinc Licenses !ct Nuclear Reactors, Washing C7 D.C.

(June 1974)

/ ANSI, Cant:ci of Radioactive surface Contamination on Materials. Ecuicment and Facilities

- To Be Released for Uncone:ciled Use. final draft. 2: posed Amer:can.Nac: anal Scandard N "u 8 -

Acom:c Indus::ial F um, :nc.,

N.Y.

(June 1974)

.: q P

ATTACHMENT 5 FINAL SURVEY OF LAB 317 AND LAB 317 MEZZANINE Lab 317 (first floor) 4 ----11'------w 0

0 0

0 Ob0

~

0 0

+

0 0

050 0

0 0@0 0 4 0

0 0

0 317 Mezzanine 13 0

0 0 13 0 24' 0[

0 0

h 0 13 0 0 Stairs 0

0 0

0 0-0 0 0

y ceak

-O 0

0 0

._-8' 13 81" O

O O

0 0

0 0 - 0 12'

~'

0 0

0 0-0

~ OP 13 0

0 0

0 00 0

I 0

l 0@0 0

0 0

0 13 0 4'

O h 0 [< 0 0 13 0 0

0 0

p p

m-------12'------w

+ ------12'----

Notes:

1.

Final survey completed August 29, 1989 using geiger counter TBM-28

108113, calibrated May 2, 1989 and Model 19 microR meter #34915, calibrated June 28, 1989.

2.

Each unit represents a three foot by three foot area or less.

3.

Top value is the average beta / gamma contamination in DPM/100 cm2 in a three foot by three foot area or less.

4.

Bottom value is the maximum beta / gamma contamination in DPM for an area 2

less than 100 cm,

5.

Circled numbers are wipe locations.

6.

Numbers in squares are measured microR/hr radiation levels.

7.

No contamination was detected on the floors (first floor or mezzanine) or the walls of this room.

v v_,

i-ATTACHMENT 6 FINAL SURVEYS OF LABORATORY 317 ROOM WALLS INITIAL AND FINAL SURVEY OF THE NORTHWEST WALL

24'--------------- w

.l[

O' 0

0 0

h 2 meters 13 0

0 0

0 0.

0 0

0 p

INITIAL AND FINAL SURVEY OF THE SOUTHEAST WALL r-----------------24'-----------------i E

O O

0 0

0@0 h

2 meters 0

0 0

INITIAL AND FINAL SURVEY INITIAL AND FINAL SURVEY OF,THE NORTHEAST WALL OF THE SOUTHWEST WALL w-----11'---------e

+ -----12'------->

0 0

h 0

0 0

0 l

h @0 0

0 0

h 2 meters 2 meters 13 l

0 0

l 0

0 0

0 1,

0 0

y Notes:

1 -. Levels were measured on concrete floor.

2.

Final surveys completed August 30, 1989 using TBM-28 geiger counter (# 108113) calibrated calibrated May 2, 1989.

3.

Each unit represents a three foot by three foot area or less.

2 4.

Top value is the average beta / gamma contamination in DPM/100 cm in a three foot by three foot area or less.

5.

Bottom value is the maximum beta / gamma contamination in DPM for 2

an area less than 100 cm,

6.

Circled numbers are wipe locations.

7.

Numbers in squares are microR/ hour surface radiation levels.

8.

No contamination was detected on any of the walls.

}.,.

y; j.,

[.

o ATTACHMENT 7-FINAL SURVEY OF COMBINED LABS 355/357.

l-* - - - - - - - --- - - - 2 2.1 / 2 ' - - -- -- -- -- - - +1

-d.

0 0-0 0

0 0

0

-0 0

0-0 0

0 0

Ob0 Oh0 Oh0 0

0 0

0

'0h0 0

0 0

0 4

0 0

0-0 0

0 0

0 24'

's Os 0

0 0

0 0g0 0

0 0

O 0

0 O

y 0

0 0

0 0QO O

O O

O Ov0 0

0 0,

0 0

2 o ' ? \\o(Do o 'Nt o

o Lab 357 Lab 355

%-----------------24'----------------+-l Notes:

1.

Final survey of labs completed August 30, 1989 using geiger counter TBM-15

108113, calibrated May 2, 1989 and Model 19 microR meter #34915, calibrated June 28, 1989.

2.

Each unit represents a three foot by three foot area or less.

2 in a three 3.

Top value is the average beta / gamma contamination in DPM/100 cm foot by three foot area or less.

4.

Bottom value is the maximum beta / gamma contamination in DPM for an area 2

less than 100 cm,

5.

Circled numbers are wipe locations.

6.

Numbers in squares are measured microR/hr radiation levels.

7.

No contamination was detected on the floors or the walls of this room.

____________-____--___-___________Q

,z

' ATTACHMENT 8 FINAL SURVEY OF THE WALLS OF LABORATORIES 355/357 INITIAL AND FINAL SURVEY OF THE NORTHWEST WALL w

2(----------->

A 0

0 0

0 00 0

0 0

0 00 h

2 meters 13 1

0 0

00 y

0 0

00 INITIAL AND FINAL SURVEY OF THE NORTHEAST WALL

+

24'-------------- +

A 0

0 0-0 0

0 0

0 h

h 1

2 meters 0

0 0

0 Y

INITIAL AND FINAL SURVEY OF THE SOUTHWEST WALL

- ------------------24>-------------- -

A 0

0 0

0 2 meters 1

1 0

0 0

0 INITIAL AND FINAL SURVEY g THE SOUTHEAST WALL

.-----------------22'----------------

A 0

0 0

0 2 meters h

13 0

0 0

0 y

Notes:

1.

Final surveys completed August 30, 1989 on the concrete floor using TBM-28 geiger counter (# 108113) calibrated calibrated May 2, 1989.

2.

Each unit represents a three foot by three foot area or less.

3.

Top value is the average beta / gamma contamination in DPM/100 cm2 in a three foot by three foot area or less.

4.

Bottom value is the maximum beta / gamma contamination in DPM for an 2

area less than 100 cm,

5.

Circled numbers are wipe locations.

6.

Numbers in squares are microR/ hour surface radiation levels.

7.

No contamination was detected on any of the walls.

l

[.. ;

i' - -

[i.!

I ATTACHMEtff 9 I,'~

INITIAL SORVEY CF CGEINED IABS 359/361' 22'1/2' r;

ic I

O O

0 0

0 '.

0 0

0 0-0 0

0 0

0 24' O

O O

0 0

0

\\

0 0

0 0[

0 0

W 24'--

+1 Notes:

1.

Initial survey of labs completed September 11, 1989 using geiger counter

TBM-28 #92238, calibrated July 20, 1989 and Model 19 microR meter #34915, calibrated June 28, 1989.

2.

Each unit represents a three foot by three foot area or less.

3.

Values are reported in counts per minute (cpn) beta / gamna. Background levels have been subtracted frcan tge readings.

4.

'ho " spots", i.e. less than 100 cm, were found to be contaminated; cont minant was identified as thorium. One spot measured ~2000-3000 cpn beta /ganma and about 50 cpn alpha; the other spot measured 140 cpn beta /gamua and ~50 cpn alpha before cleanup. Both spots were decontaminated to background levels (see Attachnent 9A for final survey results).

=__ _ ___- _ ___ __ _ --___ ____ _- _ _

EDC19ENP 9A FINAL SURVEY CF CDEINED IABS 359/361 W

22 1/2' H

0 0

13 0

0 0

0 13 13 0

0 0

0-0 0

0 0

0

-0 0

0 0

040 0

0 OQO O

l 0

OW0 0

0 0v0 0

0 0

24' O

O O

O' O

O O

eo o

o o

24' y

Notes:

1.

Final survey of labs completed September 11, 1989 using geiger counter TBM-28 #92238, Calibrated July 20, 1989 and Model 19 microR meter #34915, calibrated June 28, 1989, 2.

Each unit represents a three foot by three foot area or less.

3.

Top value is the average beta / gamma contamination in DPM/100 cm in a three foot by three foot area or less.

4.

Botte value is pe maxinum beta / gamna contamination in DPM for an area less than 100 cm.

5.

Circled numbers are wipe locations.

Numbers in squares are measured g'croR/hr radiation levels.

6.

7.

The two small areas (each ~100 cm ) found to be slightly contaminated (see At w h nt 9) were decontaminated to background levcls.

t ATTACHMENT 10 INITIAL SURVEY T 'NE MAILS T LABORA'KRIES 359/361 INITIAL SURVEY & 'NE NCEMBEST MAIL

-+

24' 0

0 0

0 2 meters 0

0 0

0 i

0 0

y INITIAL SORVEY T 'EE NCIMEAST MALL

-22 1/2' L

0 0

0 0 0

0 0

0 0 0 2 meters 0

0 0

0 0 0 0

0 0

0 0 0 F

INITIAL SURVEY T 'EE S0[mMEST MAIL 24' 0

0 0

0 2 meters 0

0 0

0 p

INITIAL SORVEY T 'EE S0[MEAST MAIL 24'

=

A 0

0 0

0 1000 0

0 0

0 8'

O O

600 0

0 V

Notes:

1.

Final surveys completed September 11, 1989 on the concrete rloor using TBM-28 geiger counter (# 92238) calibratt.d July 20, 1989.

2.

Each unit represents a three foot by three foot area or less.

3.

Values provided are counts per minute (cpn) beta /ganma measurements using a TBM-28 geiger counter. Conenminant was identified as thorium.

2 4.

The area identified as 1000 cpu beta /ganma represents an area ~100 cm ;

the other area identified as reading 600 cpn beta /ga:::na represents an 2

area of ~ 1 ft. Both areas were decontaminated to background levels (see Attachment 10A).

F..

. =,

ATf1CHMENT 10A FINAL SURVEY T 'DE MILLS T LABCEUERIES 359/361 FINAL SURVEY T DE NCR& DEST MALL 24' 0

0 0

0 0{0 2 meTrs 13 0

0 0

0!

P l

FINAL SURVEY T 'DE NtRDEAST MALL 22 1/2' b

0 0

0 0 00 0

0 0

0 0 0 0] 0 2 meters 13 O """ 0 0

0 0

0 0I y

l FINAL SURVEY T 'HE S0[MMEST MALL 24 '-

0 0

0 0]

0]0 2 meters j

0 0

FINAL SURVEY T 'HE SU[MEAST MALL

'=

2 4 ' --

d 0

0 0

0 0-0 0

h 3

8 8

0 0

f Notes:

1.

Final surveys completed September 11, 1989 on the concrete floor using TBM-28 geiger counter (#92238) calibrated July 20, 1989.

2.

Each unit represents a three foot by three foot area or less.

2 3.

'Ibp value is the average beta /c:ma contamination in DPM/100 cm in a three foot by three foot area or less.

4.

Bottam value is ghe neximum beta /gama contamination in DPM for an area less than 100 cm.

5.

Circled numbers are wipe locations.

6.

Numbers in squares are microR/ hour surface radiation levels.

7.

The two small area on the southeast wall (see Attachment 10A) were j

decontaminated to background levels.

4 a

e' t

[-

L ATTACHMENT 11 FINAL SURVEY T EZZANINE ADOVE CIM3INED LABS 359/361 23' 1"

w a

0 0

0 D Platform (connects to stairs) 0"-

1 0

0 Catwalk--+-

0 Y

0 y-Stairs 0

T 0

T S

l 0

0 0

0 b

0 0

O 24-0 0

0 0

Wipe 16'2" g o ipe Location 0

0 0

v

' Location on North 0

0 0

0 on Southeast Wall West Wall 0

0 0

0 1

1 0

0 0

0

-24'6" z

Notes:

1.

Final survey of labs ccx:pleted August 30, 1989 using geiger counter

~

TBM-15 #108113, calibrated May 2, 1989 and Model 19 microR meter

34915, calibrated June 28, 1989.

2.

Each unit represents a three foot by three foot area or less.

3.

Top value is the average beta /gama conthtion in DPM/100 cm in a three foot by three foot area or less.

4.

BottcIn value is pe maximum beta /gama contamination in DPM for an area less than 100 cn.

5.

Circled numbers are wipe locations.

6.

Numbers in squares are measured microR/hr radiation levels.

7.

No contamination was detected on the floors or the walls of this room.

c,

ATDCHMENT 12 FINAL SURVEY & CCNBINED IABS 554/556/558/560

~45 2/3' c

~11' ac

~11' m-

~23 2/3' 88: :e: :e:

ge: 44 ge:

0 0

'O O

3 34 1

34 O

O O

C 0

0 0

0 5

14 0

0 0

C 0

0 0

0 1 0 17 0 0

0 0

0 2o o

1 14 24 '

O O

O 1 0 0

0 0

0 7

34 0

0 0

0 pO 0@0 0@0 O

O O

1 0 0

6 0

0 0

0 34 IAB 560 LAB 558 LAB 556 LAB 554

=

12' r :

-12' r

25' r

49' 4

=

Notes:

1.

I4vels were measured on the surface of the concrete floor.

2.

Final surveys completed September 7, 1989 using TBM-28 geiger counter

(#108113) calibrated calibrated May 2, 1989 and Model 10 microR meter #34915, calibrated June 28, 1989.

3.

Each unit represents a three foot by three foot area or less.

2 4.

'Ibp value is the average beta /gama contamination in DPM/100 cm in a three foot by three foot area or less.

5.

Bottan valug is the maximum beta /gama contamination in DPM for an area less than 100 c.

6.

CiIrled numbers are wipe locations.

7.

Numbers in squares are microR/ hour surface radiation levels.

8.

No contamination was detected on any of the floors or walls, except for a 2

small spot (about 100 cm ) indicated as #

which measured about 350 cpm (beta / gamma) and about 250 cpm (alpha).

It was decontam-inated to less than 1000 dpm/100 cm2,

M"lX3ENT 13 FINAL SURVEYS T 1@ ILLS T CX24BINED LADORA'ICRIES 554/556 INITIAL AND FINAL SURVEY CF HE MR& DEST MAIL 23 2/3' h

0 0

0-0 0

0_0 O

O O

O O -0 0

l3 2 meters 13 22 00 0

0 0

0 p

INITIAL AND FINAL SORVEY T 'UE MRDEAST MALL 24'-

A 0

0 0

0 0-0 0

0 0

0 00 2 meters

),3 23 13 0

0 0

g INITIAL AND FINAL SORVEY T 'DE S00'DDEST MAIL

-15 ' 9 " '

J 0

0 0

0 00 1

0 _0 0

0 00 2 meters 13 25 0 TO O

OO 0

0 0

0 00 p

INITIAL AND FINAL SURVEY & 'DE SODIEEAST MALL

25 ' --

a 0

0 0

00 1

0 0

0 h

0 0

0 00 2 meters Tf 13 24 0 -0 0

0 0

0 00 0

0 0

00 Notes:

1.

Final surveys cmpleted September 7,1989 on the concrete floor using TBM-28 geiger counter (# 108113) calibrated calibrated May 2, 1989 and Model 19 microR meter #34915 calibrated June 28, 1989.

2.

Eacn unit represents a three foot by three foot area or less.

3.

'Ibp value is the average beta /ga::ma contamination in DPM/100 cm in a l

three foot by three foot area or less.

4.

Bottcru value is the mwimm beta /gamia contamination in DPM for an area less than 100 cm#.

i 5.

Circled numbers are wipe locations.

6.

Numbers in squares are microR/ hour surface radiation levels.

7.

No contamination war detected on any of the walls.

I

$l KITACIDENT 13A FINAL SURVEYS T MALIS T LABCRKLMY 558 -

INITIAL AND FINAL SORVEY T 'ITE N3mDEST MALL c

11' 0

0 0

'O O

O_0 0

2 meters 14 0

0 0

0 INITIAL AND FINAL SDRVEY T TIE N3mEAST MALIr 15'9" r:

I O

O O

O OO O

O O

O OO 2 metern 14 26

~

0 0

0 00 0

0 0

0 00 V

INITIAL AND FINAL SURVEY T 'HE SO[THDEST WALL e*

15' 9"'

--m E

O O

OO O_0 0

0 00 2 meters

. 14 27 0~0 0

0 00 0

0 0

0 00

- INITIAL AND FINAL SURVEY T 'HE S0[THEAST MALL w

12'

=

E O

O O

O 2 meters G

0 0-0 0

0 0

U Notes:

1.

Final. surveys completed September 1, 1989 on the concrete floor using TBM-28 geiger counter (# 108113) calibrated calibrated May 2, 1989 and Model 19 microR meter #34915 calibrated June 28, 1989.

2.

Each unit represents a three foot by three foot area or less.

2 3.

'Ibp value is the average beta /gamra contamination in DPM/100 cm in a three foot by three foot area or less.

4.

Bottcan value is the mavimm beta /gamra contamination in DPM for an area less than 100 cm#.

5.

Circled numbers are wipe locations.

6.

Numbers in squares are microR/ hour surface radiation levels.

7.

No contamination was detected on any of the walls.

Q."

MTACHEN1' 13B FDGL SURVEYS T MALLS T LABCRMUE 560 INITIAL AND FINAL SORVEY T DE NCRHDEST MALL

=

11' A

0 0

l 0

0 0

0 2 neters

"' 1 0

O bo O

0 0

p INITIAL AND FINAL SORVEY T DE NCRHEAST MALL 15'9"-

u d

0 0

00 0

0 0

0 00 2 meters 14 28 0- 0 0

0 00 0

0 0

0 00 p

INITIAL AND FINAL SURVEY T DE SOUHDEST MALL

!=

24' m

d 0

0 0

O_0 0

0 0

I4 2 neters 14 2*

0 0

0

.v.

INITIAL AND FINAL SURVEY T DE NORHDEST MALL l=

11' d

0 0

2 neters 14 0

00 0

0 0

q Notes:

1.

Final surveys completed September 1, 1989 on the concrete floor using TBM-28 geiger counter (# 108113) calibrated calibrated May 2, 1989 and Model 19 microR neter #34915 calibrated June 28, 1989.

2.

Each unit represents a three foot by three foot area or less.

3.

Top value is the average beta /ganma contamination in DPM/100 cm in a three foot by three foot area or less.

Bottom value is the @m.

beta /ganma contamination in DPM for an 4.

area less than 100 c I

l 5.

Circled numbers are wipe locations.

6.

Numbers in squares are microR/ hour surface radiation levels.

7.

No contamination was detected on any of the walls, t

p

,e G.

ATDCEMENI' 14 FINAL SORVET & CD EINED LABS 562/564 re-----

26 1/3' M

O O

O Oho ogo O

O O

-0 0

0 0

0 0-0 0

0 0

0 2

16 0

0 0

0-0 0

0 0

1 0

0 0

24' 0

0 0

N 0

0 0

d 0

0 0

1 0

0 0

0 _0 0-0 0

0 0

0 Og 0 0

0 0

LAB 564 LAB 562 W

28 2/3' M

Notes:

1.

Final survey of labs ccmpleted September 1,1989 using geiger counter TBM-15 #108113, calihrated May 2,1989 and Model 19 microR meter #34915, calibrated June 28, 1989.

2.

Each unit represents a three foot by three fact area or less.

2 3.

'Ibp value is the average beta /gama contamination in DPM/100 cm in a three foot by three foot area or less.

4.

Bottczn value is tpe maxinum beta /gama contamination in DPM for an area less than 100 cm.

5.

Circled numbers are wipe locations.

6.

Numbers in squares are measured microR/hr radiation levels.

7.

No contamination was detected on the floors or the walls of this room.

o

[y,,4 i.

p MTRCNENT 15 FINAL SORVEYS T MRILS T CGEINED LABNA'ItatIES 562/564 INMAL AND FINAL SORVEY T M NORDI 1 GEL W

2 6 ' 4 "-----

I I

.0 0

0 1 0 0

0 0

0 2 meters 0

0 0

0 0-0 0

0 INMAI, AND FINAI. SURVEY T M W:ST MRLI.

!=

24'-

O O

2 meters 0

0 1 0

0 0

0 y

INITIAL AND FINAL SORVEY T M EAST MRLL l=

24'

--M 7'

O O

2 meters 0

0 0

0 3

INMAL AND FINAL SURVEY T M SOUM MALI.

W

--2 8 ' 8 "-----

y 0

0 0

0 0 0 0

0 0

0 0 0 2 meters 0

0 0

0 0 0 0

Og 0 0

0 0

0 0 34 Notes:

1.

Final surveys completed September 1, 1989 on the concrete floor using TBM-28 geiger counter (# 108113) calibrated calibrated May 2, 1989 and Model 19 microR meter #34915 calibrated June 28, 1989.

2.

Each unit represents a three foot by three foot area or less.

2 3.

Top value is the average beta /gama contamination in DPM/100 cm in a three foot by three foot area or less.

4.

Bottczn value is pe maximum beta /gama contamination in DPM for an area less than 100 cm.

5.

Circled numbers are wipe locations.

6.

Numbers in sqaares are microR/ hour surface radiation levels.

7.

No contamination was detected on any of the walls.

7-_,-_-

6 s GROSS ALPHA / BETA COUNTING RESULTS FOR t'IPE SAMPLES

. AUS 3 019BE ALPHA BETA COUNT SAMPLE ID LENGTH DPM/100 SG.CM.

% ERROR DPM/100 SD.CM.

% ERROR MIN 95% CL 95% CL L317W-1 Lab 317 1.

<1.049E-02 95.00

<3 727E-01 95.00 2 8/30/85 Lab 317 1.

<1.049E-02 75.00

<3.727E-01 95.00

.3 Lab 317 1.

<1.049E-02 95.00

<3.727E-01 95.00 4

Lab 317 1.

<1.049E-02 75.00

<3.277E-02 95.00 5

NE Wall Lab 3171.

<1.049E-02 95.00

<3.277E-02 95.00 6

NW Wall Lab 317 1.

<1.049E-02 75.00 0.130E-01 156 02 7

SW Wall Lab 3171.

<1.049E-02 95.00 (9.194E-01 95.00 8

SE Wall Lab 3171.

<1.047E-02 95.00

<3.277E-02 95.00 9

Lab 317 Mezzaniqq

<1.049E-02 95.00

<9.194E-01 95.00 10 Lab 317 Mezz 1.

<1.047E-02 75.00

<3.727E-01 Y5.00 AVERAGE 1.049E-02 4.241E-01 HIGH 1.049E-02 9.194E-01 LOW 1.049E-02 3.277E-02 NOTE: THE ERRORS DO NOT INCLUDE INHERENT EFFICIENCY CALIBRATION UNCERTt.INTIES.

SEE ATTACHMENTS 5 and 6 FOR WIPE LOCATIONS:

1-4 (Attachment 5)

5-3 (Attachment 6)

9-10 (Attachment 5)

ATTACHMENT 16:

CONTAMINATION SURVEY RESULTS FOR LAB 317 AND LAB 317 MEZZANINE l

l-

p. :.7.;

GROSS ALPHA / BET A: COUNTING RESULTS FOR WIPE St.MPLES.

Page'l of12 f

N [ @ 3,6. h ipt ALPHA

. BETA

?

' COUNT H

SAMPLE'ID LENGTH DPM/100 SD.CM.

%' ERROR DPM/100 SG.CM.

% ERROR-

-MIN-

95% CL 95% CL-102-357,359,3.

1.

<1.049E-02 95'.00

<3.277E-02 95.00 2BN/b 359/.iB1

<1.049E-02 95.00

<3.277E-02 95.00:

1 Lab' 359/361~

1.

2 79BE-01 230.60

<3.277E-02 95.00' i, 4 2 ; Lab ' 359 /361 1 '.

2.790E-01 230.60

<3.727E-01

'95,00 5 Labs'355/357 1.

<1.049E-02 95.00

<3.277E-02 95.00

~

6" Labs 355/357 1.

<1'.049E-02 95.00-

<1 415E 00 95.00 7 Labs 355/357

~1.

<1.049E-02 95.00

<3.277E-02 95.00 0

Labs 355/357.

1.-

<1.049E-02 95.00

<9.194E-01 95.00 9l. Walls of Labs 1.

<1.049E-02 95.00

<3.727E-01 95.00^

355/357 (NW) 10 Walls-Labs 355/1.

<1.049E-02 95.00 (9.194E-01 95.00 357' (SW)'

1 11 Halls-Labs 355/1.

<1.049E-02 95.00

<3.727E-01 95.00 357 (SE) 12 Walla-Labs 355/1.

<1.049E-02 95.00

<3.727E-01 95.00

357 (NE) 13 Wa{1s-359/361

1. (SW)

<1.049E-02

-95.00 (3.277E-02 95.00

~

114 1.

2.798E-01 230.60

<9.194E-01 95.00 E

15 Walls-359/361 1.

2 798E-01 230.60

<9.194E-01 95.00

.(NE) 16 Walls-359/361 1.

2.798E-01 230.60

<3.727E-01 95.00 (NW) 17 Walls-359/361 1.

<1.049E-02 95.00

<3.277E-02 95,00 (SW).

18. NE Wall-3 55 / 3 5 71.

9.382E-01 119.12

<1 415E 00 95 00 (NE)'

19 359/361 Mezz 1.

<1.049E-02 75.00

<3.727E-01 95.00

' 20 359/361 Mezz 1.

<1.049E-02 95.00

<3.727E-01 95.00

-21 359/361 Mezz 1.

2.798E-01 230.60

<3.277E-02 95.00 22 359/361 Mezz 1.

2.790E-01 230.60

<1.415E 00 95.00

23 SE' Wall of 1.

<1.049E-02 95 00

<3.727E-01 95.00 359/361 Mezz NOTE: -THE ERRORS DO NOT INCLUDE INHERENT EFFICIENCY CALIBRATION UNCERTAINTIES.

(SEE ATTACHMENTS 7, 8

9. AND 10 FOR WIPE LOCATIONS)

ATTACHMENT 17:

CONTAMINATION SURVEY RESULTS FOR LABS 355/357 and 359/361

- _ _ _ _ _ - _ _ _ - _ _ _ _ _ _ - _ _ _ _ - _ _ _ _ _ - _ _ _ _ _ _ _ _ _ _ = _

y,s ;,*. ;.

I GROSS ALPHA / BETA COUNTIMG RESULTS FOR WIPE SAMPLES Page 2 of 2

.% P H A -

BETA COUNT

'S MPLE ID-LENG1H DPM/100 SG.CM.

% ERROR DPM/100 SG.CM.

ERROR MIN 95% CL 95% CL 124' -West Wall 1.

<1.049E-02 95.00

<3.277E-02 95.00 359/361 Mezz AV,ERAGE 1.277E-01 4.666E-01 HIGH 9.382E-01 1.415E 00 LOW 1.049E-02 3.277E-02 NOTE: THE ERRORS DO NOT INCLUDE INHERENT EFFICIENCY Cf,LIBRATION UNCERTAINTIES.

ATTACHMENT'17:

CONTAMINATION. SURVEY RESULTS FOR-LABS 355/357 and LABS 359/361 L

I I

L_______________.___________

i

! ; s o..

CROSS ALPHA / BETA COUNTING RESULTS FOR WIPE SAMPLES Page 1 of 2

= SEP.0 7.1989 ALPHA BETA i

f COUNT SAMPLE ID LENOTH DPM/100 SG.CM.

% ERROR DPM/100 SG.CM.

% E?.ROR MIN 95% CL 95% CL L554-560 W-1 1.

2.798E-01 230.60

<3.277E-02 95.00 I

Lebs 554/556 i

2 9/7/89 1.

<1.047E-02 75.00

<3.727E-01 95.00 Labs 554/556 3 Lcbs 554/556 1.

<1.049E-02 95.00

<9.194E-01 95.00 4 Lcbs 554/556 1.

<1.047E-02 75.00

<1.415E 00 95.00

'5 Lebs 554/556 1.

<1.049E-02 95.00

<3.277E-02 95.00 6 Labs 554/556 1.

<1.047E-02 75.00

<3.727E-01 75.00 7 Labs 554/556 1.

<1.049E-02 95.00

<3.277E-02 95.00 8 Labs 554/556 1.

2.790E-01 230.60

<3.277E-02 95.00 9 Labs 554/556 1.

<1.049E-02 95.00

<3.277E-02 95.00 10~ Lab 558 1.

<1.047E-02 75.00

<3.727C-01 95.00 11 Lab 558 1.

<1.049E-02 95.00

<3.727E-01 95.00 12 Lab 558 1.

2.798E-01 230.60

<3.277E-02 95.00 Lab 558 1.

<'. "?E-02 75.00

<9.194E-01 95.00 13 14 Lab 558 1.

<1.049E-02 95.00

<3.727E-01 95.00 15 Lab 558 1.

<1.049E-02 95.00

<3.277E-02 95.00 16 Lab 560 1.

<1.049E-02 75.00

<3.727E-01 95.00 17 Lab 560 1.

<1.049E-02 95.00

<i.415E 00 95.00 18 Lab 560 1.

<1.049E-02 95.00

<3.727E-01 95.00 19 Lab 560 1.

<1.049E-02 75.00

<3.277E-02 95.00 20 Lab 560 1.

<1.049E-02 95.00

<3.277E-02 95.00 21 SW Wall 560 1.

<1.049E-02 95.00

<3.277E-02 95.00 22 NW Wall 554/554.

<1.047E-02 75.00

<3.727E-01 95.00 23 NE Wall 554/5561.

<1.049E-02 95.00 (3.727E-01 95.00 NOTE: THE ERRORS DO NOT INCLUDE INHERENT EFFICIENCY CALIBRATION UNCERTAINTIES.

(SEE ATTACHMENTS 12, 13, 13A and 13B'for WIPE LOCATIONS)

ATTACHMENT 18:

CONTAMINATION SURVEY RESULTS FOR LABS 554/556/558/560 i

> o.*. 9.

' GROSS ALPHA / BETA COUNTING RESULTS FOR WIPE SAMPLE 0 Pag 6 2 of 2.

ALPHA BETA-COUNT SAMPLE ID LENGTH DPM/10v SG.CM.

% ERROR

'DPM/100 SG.CM.

% ERROR MIN 95% rf.

95% CL 24 SE Wall Lab 1.

<1.049E-02 95.00

<9.194E-01 95.00 554/556 25SW Wall 554/556 1.

<1.047E-02 75.00

<3.277E-02 95.00 26 NE Wall 554/556,

<1,049E-02 95.00

<3.277E-02 95.00 1

27 SU Wall 558 1.

<1.049E-02

'75.00

<3.277E-02 95.00 28 NE Wall. Lab 5601.

'2.798E-01 230.60

<3.727E-01

'95.00 AVERAGE 4.896E-02 3.479E-Oi IIIGH

-2.790E-01 1.415E 00 LOW 1.049E-02 3.277E-02 NOTE: THE ERRORS DO NOT INCLUDE INHERENT EFFICIENCY CALIBRATION UNCERTAINTIES.

(SEE' ATTACHMENTS'12, 13, 13A and 13B-for WIPE LOCATIONS)

ATTACHMENT 18:

CONTAMINATION SURVEY RESULTS FOR LABS 554/556/558/560 l

a l

,A>.,.

GROSS ALPHA / BETA COUNTING RESULTS FOR WIPE SAMPLES

'hf,Pt61000 ALPHA BETA COUNT SAMPLE ID LENGTH DPM/100 SG.CM.

% ERROR DPM/100 SQ.CM.

% ERROR MIN 95% CL 95% CL L562/564 W-1 1.

<1.049E-02 95.00

<1.415E 00 95.00 Labs 562/564 2 9/5/89 Labs 562/1.

2.79BE-01 230.60 7.827E-01 163.07 564 3 Lebs 562/564 1.

<1.049E-02 95.00

<3.277E-02 95.00 4 Labs 562/564 1.

<1.049E-02 95.00

<3.277E-02 95.00 5 Lebs 562/564 1.

2.798E-01 230.60

<?.194E-01 95.00 6 Labs 562/564 1.

6.090E-01 149.83

<3.277E-02 95.00 7 Labs 562/564 1.

<1.049E-02 95.00

<3.727E-01 95.00 8 Labs 562/564 1.

<1.049E-02 95.00 (3.727E-01 95.00 9 Labs 562/564 1.

<1.049E-02 95.00

<3.277E-02 95.00 10Ecot Wall 1.

9.382E-01 119.12

<3.277E-02 95.00 11 North Wall 1.

<1.049E-02 95.00

<3.277E-02 95.00 12 West Wall 1.

<1.049E-02 95.00

<3.277E-02 95.00 I

13 South Wall 1.

<i.049E-02 95.00

<9.194E-01 95.00 AVERAGE 1.693E-01 3.855C-01 HIGH 9.382E-01 1.415E 00 LOW 1.049E-02 3.277E-02 NOTE: THE ERRORS DO NOT INCLUDE INHERENT ETFICIENCY CALIBRATION UNCERTAINTIES.

(SEE ATTACHMENTS 14 and 15 FOR WIPE LOCATIONS)

ATTACHMENT 19:

CONTAMINATION SURVEY RESULTS FOR LABS 562/564 i

L___----_-----_-----__..______

-__

ML20248F085

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