ML20126L463

Insp Rept 70-0033/92-04 on 921214-16.No Safety Concerns or Violations Noted.Major Areas Inspected:Survey Conducted by NRC Contractor,Oak Ridge Inst for Science & Education to Verify Survey Results Provided by Licensee

ML20126L463
Person / Time
Site:	07000033
Issue date:	12/30/1992
From:	Roth J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
To:
Shared Package
ML20126L425	List: ML20126L420 ML20126L463
References
70-0033-92-04, 70-33-92-4, NUDOCS 9301080042
Download: ML20126L463 (60)

Text

. . .

J U.S. NUCLEAR REGULATORY COMMISSION -

REGION I Report No. 20-33/92-04 Docket No. 70-33 License No. SNM-23 Priority _L Jategory UHFF  :

Licensee Texas Instruments. IncorDontted 34 Forest Street Attleboro. Massachusetts 02702 Facility Name: }1 FIR Proiect inspection At: Attleboro. Massachusetts Inspection Conducted: December 14-16. 1992 Inspector: - 7 I k J. Rd Project En'gineer 6 ate Facilh/es Radiation Protection Section Facilities Radiological Safety and Safeguards Branch Division of Radiation Safety and Safeguards .

Approved by: hhw, Mhwd /v3e M.

i . Pasciak, $f' bat [

[$ .)ilities Fac Radiation Protection Section Facilities Radiological Safety and Safeguards Branch Division of Radiation Safety and Safeguards-Areas Inspected: Special, announced inspection by a region-based inspector to observe a survey conducted by the NRC contractor, the Oak Ridge Institute for Science and Education (ORISE),

to verify survey results provided by the licensee.

~

'Results: Preliminary results of the ORISE survey indicated that the licensee appeared to have completed cleanup of the bottom _of the excavated area in an appropriate manner. ' However, elevated radiation levels obtained on the walls of the excavated areas indicate that' not all radioactive material, above the NRC-approved guidance values, had been removed. No safety

-concerns or violations of regulatory requirements were identified.

MO#$Nk C

Q3'

DETAILS 1.0 htdhhnis Contacted M. Elliot, Manager, Environmental Engineering M. Griffin, Project Manager T. Gutman, Consultant W. Lorenzen, Health Physicist J. O'Donnell, Corporate IIcalth Physicist W. Schuele, Attleboro Site Manager F. Veale, Jr., Manager, Environmental Engineering / Industrial liygiene Other licensee representatives, employees and remediation contractor employees were also interviewed during this inspection.

2.0 lbidigtound ,

On August 26,1992, NRC issued Amendment No.16 to Facility License SNM-23. This-amendment authorized the licensee to perform remediation of the on-site low level radwaste burial site in accordance with the 'Remediation Plan for the Identified Building 12 Burial Area" (Remediation Plan) and the " Radiological IIcalth and Safety Plan dated July 30,1992." The licensee performed the remediation activities between August 27 and Novernber 13,1992 and provided the NRC with the " Post Excavated Radiological Survey Report" dated November 28,1992. This report, provided as Attachment 1, was used as the basis for preparation of the " Confirmatory Radiological Survey Plan for the Texas Instruments Incorporated 11urial Site, Attleboro, Massachusetts" which was submitted to the NRC Region I office by the NRC contractor, the Oak Ridge Institute for Science and Education (ORISE) by letter dated December 10,1992 (see Attachment 2).

This plan was approved by the NRC and the confirmatory survey was conducted December 14-16, 1992.

3.0 Conduct of the Verifiention Survey ORISE personnel conducted the verification survey discussed in. Paragraph 2.0.

Available surfaces of the excavated and adjacent areas were scanned using gamma scintillation or GM detectors. Soil samples were taken from randomly selected locations within the excavated areas. Additional soil samples also were taken within the excavated ~

areas at locations that exhibited elevated radiation readings during the scanning, or were -

identified as elevated in the licensee's report. Each of these samples was split with the licensee and will be analyzed to verify the licensee's analytical ability. The results will be included in correspondence to the licensee when the analyses are completed.

3 4.0 Preliminnry Survey Results Preliminary results indicated that the licensee appeared to have completed cleanup of the bottom of the excavated area in an appropriate manner. However, elevated radiation levels (ranging from 2% to 40 times background) identined on the walls of the excavation (see Attachment 3) indicated that radioactive material, above the 30 picoeuries total uranium per gram of soil guidance value contained in the NRC-approved Remediation Plan, may not have been removed from the burial site. As a result, the licensee was requested by the inspector to perform additional remediation activ'.iies.

5,0 Additionnt Actimidentiked 5.1 1icensee Upon completion of the additional remediation activities, the licensee is expected to resurvey the excavated areas and provide the NRC with a revised Gnal survey report of the remediated area.

5.2 NRC Upon receipt of the licensee's fmal survey report, the NRC contractor will visit the site, resurvey the applicable areas and will perform Snal confirmatory surveys on the surface of the remediated area.

6.0 Esit Interview The inspector met with the licensee representatives denoted in Paragraph 1.0 at the conclusion of the inspection on December 16, 1992. The ORISE team leader and the-inspector summarized the results of the con 6rmatory survey conducted by ORISE personnel. The inspector thanked the licensee for providing the survey team logistical support and backup when required.

During the exit interview, the inspector provided the licensee with guidance in regard to soil sample result averaging. It was stated that since the soil samples were taken at the grid block intersections, the average residual uranium value for each adjacent four grid blocks also had to meet the 30 picoeuries total uranium per gram of soil criteria. .In-addition, the licensee was reminded that the results of groundwater monitoring for total uranium had to be incorporated into the Gnal report.

AIMn.cr I TEXAS INSTRUMENTE N

Movember 30, 1992 OVERNIGHT MAIL Mr. Jerry Roth U.S. Nuclear Regulatory Commission -

Region I 475 Allendale Road King of Prussia, PA 19406-1415

Dear Mr. Roth:

The attached report is being submitted to the U.S. Nuclear Regulatory Commission (NRC) by Texas Instruments Incorporated (TI), Materials & Controls Group located in Attleboro, Massachusetts. It summarizes the results of radiological surveys performed on TI property at the former burial site location near Building 12.

The radiological survey report documents the effectiveness of remediation activities carried out in accordance with a plan submitted to the NRC on July 30, 1992 and subsequently approved by the NRC on August 26, 1992. -

As we discussed during a site inspection on November 3, 1992, the excavated area will remain exposed to facilitate confirmatory sampling by Oak Ridge Institute of Science and Education.

If there are any questions or concerns regarding the enclosed report, please do not hesitate to call me at (508) 699-1809.

Sincerely yo is 3m.- _

/ .

d' -

p Mi hael J.k lliott Environmental Engineering Manager Attachment cc: Mr. James D. Berger,1 0 RISE Mr. Daniel V. Bartosh, Jr., TI Dallas Mr. Francis J. Veale, Jr., TI Attleboro TE AAS INST AUMEN1 B INCORPORATED

• M FOREST STREET

• ATTLCBOHO. MA 02703 508-6%3800

• TELEX 210001

• CABLE TEXINS

e POST EXCAVATION RADIOLOGICAL SURVEY REPORT-TEXAS INSTRUMENTS INCORPORATED BURIAL SITE Attleboro, Massachusetts Prepared by Creative Pollution Solutions, Inc.

11/28/92

INTRODUCTION 3 The post excavation survey for the Texas Instruments Incorporated Building 12 Burial Site was designed in accordance with the Remediation Plan (approved 8/29/92). The remediation of the site included at least all areas outlined in the initial plan. When necessary, additional areas were excavated. The average depth of the excavated area is approximately 1.5 meters. In many areas groundwater was reached. Excavated material was either processed to remove aggregate and/or staged for disposition. A volume of approximately 90,000 ft' of material was excavated of

which approximately 58,000 ft' was sent to EnviroCare of Utah via rail for final disposition ~.

Figure 1 in Appendix A in this report shows the area of excavation. The excavated area will not be backfilled (except around an exposed fire hydrant) until after ORISE completes necessary sampling to confirm the post excavation survey.

l The post excavation survey consists of two parts: a walkover surface scan of the affected area and surface soil sampling of the excavated area.

SURFACE SOIL SAMPLING WITIIIN TIIE EXCAVATED AREA The soil sampling plan for the excavated area consisted of surface soil samples at each corner and in the middle of each 10 meter x 10 meter grid cell. Wherever possible surface (0-15cm) soil samples of approximately I kg each were collected at these points. In some cases excavation equipment had to be used to extract a sample from beneath the standing water, A map of sample locations along with sample results are shown in Appendix A. All of the samples from the excavated area were analyzed using gross alpha screening. The average of all gross alpha screening samples within the excavated area is less than 30 pCi/g (Note: 30 counts /10 min approximately equals 30 pCi/g as correlated with Babcock and Wilcox gamma spectroscopy data

-- see Appendix C). The gross alpha screening methodology is described in Appendix B.

SURVEY OF AFFECTED AREA A walkover surface scan using portable Nal(TI) gamma scintillation detectors was conducted at 1 meter intervals over the entire affected area. The affected areas consist of any areas in the defined exclusion area (see Health and Safety Plan,8/92). The grid system established in the ORAU Radiological Survey (1985) was used. A walkover of the excavated area was not possible because of the elevated water table and accumulation of surface water run-off in this area. The walkover survey data is provided in Appendix D.

These surveys were conducted with a Ludlum model 44-21" by 1" Nal(TI) probe coupled to-a Ludlum model 2221 Portable Scaler /ratemeter. The purpose of these surveys was to determine and locate any radiological anomalies. The Nal type detectors are inherently highly energy

- . . ... -. . . - - - . - - - -.- - .. - . - - - . . . . - - . - ~ - - - .

\

dependent, but are useful due to_ its general greater sensitivity. LThe use of such instruments are well suited for the identification of anomalies, however; care must be given when interpreting the response in terms of exposure rates ( R/h), In this regard, a linear response check was -

performed using a "Co Source, the results of which are included within Appendix D. The energy distribution of photons encountered in field are characterized by.a much lower photon ,

energy distribution which is further-confounded by a large degradation of this spectral distribution due to the source incorporation in a soil matrix. The interpretation of exposure rate c from this instrument, short of an exhaustive study, is to assume from previous studies (ORAU) that a nominal background exposure rate of 11 R/h exists and that a the NaI(TI) background response correlates to this value. Even under this presumption certain errors will exist such as variation of background with time. Not withstanding a response factor from 0.0039 to 0.0034 with an average of 0.0037 is established.

3 J

, e a - , -n,-m -- - , -n,- m a -

L APPENDIX A-EXCAVATION FLOOR SAMPLING ALPHA SCREENING RESULTS NOIlh East Aloha ScreenJpCi/g) 200 150 29 200 155 7 200 160 16 200 165 19 195 155 11 195 165 10 190 130 17 190 140 12 190 150 28 185 125 l45; I85 135 #0

!S5 145 j8';

185 152 !5d 185 155 M.

I80 125 15 I80 130 14 180 150 4 180 152 48 180 155 11 175 115 14 175 125 12 175 135 14 170 110 53 170 115 22 170- 120 '34 170 130 7 170 140 16 170 180 22 170 190 46

i t

Nenh East Alpha screen (pci/g) 165 110 34 165 115 18 165 125 11 165 135 22 165 185 30

60 110 22 160 120 17 160 130 27 160 140 24 160 180 33 160 190 23 155 125 12 155 135 25 150 110 26 150 120 27 150 130 21 150 140 55 145 105 9 145 115 18 145 120 17 142 110 24 _

140 110 42 140 120 9 Average of values = 23.10 pCi/g Standard deviation = 13.23 l

I

_j l i

. 1 V

C SURFACE S0lt SAMPLING LOCATIONS

^

fl - Sample Locations

> [i._

c. a s %"

--  :.i .

m g%. .

v_

sy .<,~

ne l '.,L.,..

y 4 >,.  ; .,

=_

/6c -

l ~

..e i ,

iss m y-g --

/So ri, -a 40 o Nd V / 6 -

evs-

% s y

no I m

q e

p5 . ..

c w w.

w w

/)u w a e e i e

nc - '

e s s e o N

'2"

- N u, ~

- , a i

lif 3E ms

%f MS %d 'W ito e va c:-

gQ (9 , ,

, i fD- --

i

/00 l DNDid' V d O

N O b 4 e D Q h N 3 N

A s

h s'

n.

s 4

s ks N g

t' APPENDIX II ALPIIA SCREENING METIIODOLOGY The alpha screening technique employed was gross alpha counting of a soil sample in intimate contact with a ZnS(Ag) detector. Usi.,g this method the ZnS(Ag) disc is disposable.

The method employed in the field was as follows:

1) Approximately I kg soil sample obtained

2) Sample homogenized by mixing (in larger container if necessary)

3) An aliquot of the homogenized sample is then (approximately 20-40 grams) dried in an oven at about 100* C for approximately 10 minutes. The sample is then allowed to cool. ,

4) The sample is then sieved and placed in direct contact with the phosphor side of the ZnS dish assembly.

5) The sample is then place in direct contact with a photomultiplier tube and counted for 10 minutes.

The counts obtained have been correlated to bot'a alpha spectroscopy and gamma spectroscopy.

The correlation to gamma spectroscopy is attached in Appendix C and the correlation to alpha spectroscopy has been demonstrated in previous reports.

i l

APPENDIX C COMPARISON OF ALPIIA SCREENING AND GAMMA SPECTROSCOPY Since the post excavation sutvey results were obtained using alpha screening 10 split samples were sent to both ORISE and an outside laboratory to establish a correlation between the gamma spectroscopy data and the alpha screening data. The comparison with one-set of gamma spectroscopy rr,sults are shown below.

1 Notes regarding attached graph:

1) alpha screening resn1t is based on an average of 5-10 samples

2) gamma spec data assumed an activity ratio (U-234/U-235)_of 22, 4

+

1. 'a -m- *- --

e- m-T w P

• e

Comparison of Alpha Screening cnd Gamma Spectrcscopy for Uranium in Soil SAMPLE ID ALPHA SCPEEN GAMMA SPEC (TOTAL U pCl/g)- (TOTAL U pCl/g) 138N 113E 21.4 1.2 51 0 ' + '

134N 118E 12.8 4.05 i t, m MP5 15.9 7.1 d f.'70 MP12 19.2 11.0' 30 235N 15GE 19 12.4 b %bV MP4 14.2 21.82 3 />h7 Rock Pile 25.0 20.90 .i 24

DFP 29.9 30.7011'N RS410/411 75.3 ite.995W RS414 85 W.77CId7 Comparison of Alpha Screening and Gamma Spectroscopy for Uranium in Soll 100 -

$ 30 p

,a 80 70 00 Alpha Screening

[A 50 g 40 j

[ 30 - p Gamma

/

0a\,p a#"

10 - "

,/ Spec.

O@ . . . . .

N $ f 4 E. 1 [ g O  %

; 2 E

2 u a 3

.b h h b  ;[

C  ? .N e Sample ID

APPENDIX D WALKOVEll SURVEY RESULTS NOTE: The attached represents the results of the walk over survey. The results presented are in the units of counts per minute (cpm) ..

i ia si e i a m - - - . . . .. . . ..

. Detennin: tion of flic Respome of tiie Ncl(TI) Detector for R:diologic 1 l'ield Surveys l Dkg 2.5 meter 2.0 meter 1.5 motor 1.0 meteg i 1.00 5200.00 7455.00 8444.00 10938.00 17472.00  !

2.00 5283.00 7277.00 8584.00 10835.00 17040.00 3.00 5143.00 7441.00 8751.00 11107.00 17738.00 4.00 4959.00 7489.00 8552.00 10797.00 17744.00 5.00 5000.00 7589.00 8418.00 10804.00 17790.00 0.00 5105.00 7602.00 8334.00 10542.00 18004.00 Average 5125.33 7475.50 8510.50 10847.17 17742.33 Exp. Err 113.04 118.39 145.98 185.39. 193.97 Th. Err. 71.59 80.40 92.25 104.15 133.20 Chi. Sq. 2.52 1.87 2.50 3.17 2.12 Net Responso, cpm 2350.17 3385.17 5721,83- 12617.00 Dose Rato, uR/h 14.58 28,13 50 112.5 Calibration Factor UR/h/com 0.0002038 0.0083083 0.0087385 0.0089165 Doso Rato Rosponso of Nal(TI) Detector 120 -

m 100 80 -

h a

j 00

a

$ 40 m

20 .

e 0 4  ; 4 , p y 0.00 2000.00 4000.00 6000.00 8000.00 10000.00 12000.00 14000.00 Detector Response (cpm)

Detennination of the lhspome of the Nal(TI) Detector for Itadiological 11 eld Surveys ftegression Statistics Multiple R 0.9902444 R Square 0.9925029 Adjusted R Square 1.333333 Standard I'rror 75'7943 Observations 1 Ar.Jym of Venence di Sum of Squares Mann Severe F Hegression 4 5500.341138 1397.58528 397.10 Residual 3 42.22788077 14.0750003 Total 7 5632.500019 Coetteients Standard Error I Statistic P value lower 95% Ug,per 95 %

intercept 0 Slope 0.0087835 0.000259572 33.8385201 SE-00 0.0079575 0.00961 l

Walk Over Surf:ce Scan Coordinates East 105 106 107 108 109 110 111 112 113 North 120 121 122 123 124 125 126 127 128 3200 3200 2500 129 2600 2800 2800 2500-130 2700 2600 2700 3500 131 3000 2800 2800 2900 132 2800 2500 2500 2500 2500 2500 133 2500 2600 3100 3100 3200 2900 134 tar tar tar 3000 3000 2800 3000 2800 2800 135 tar 3200 2500 3200 3100 3000 3100 3200 3000 136 tar 2900 3000 3300 3000 3000 3300 3100 3100 137 tar 3000 2900 3000 3100 3000 2900 3300 3200 138 2900 2900 3100 3100 3200 3100 3000 3000 3100 139 3500 3200 3000 3300 3000 3200 3000 3200 3200 140 3300 2800 3600 3900 3300 3300 3200 3300 3300 141 3300 3500 3500 3500 3700 3300 3800 3700 3700 142 tar 3300 3500 4000 3300 3000 3200 3100 3200 143 tar 144 tar 145 tar 146 tar 147 tar 148 tar 149 tar 150 tar -

151 tar 152 tar 153 tar 154 tar l

155 tar 156 tar 157 tar 158 tar 159 3200 3500 4000 3200 5500 5000 160 3600 3900 4000 3900 3500 161 3700 3800 40C0 4000 162 4100 4500 4000 3900 163 3500 4000 3700 4000 164- 3900 3900 3900 3800 165 3500 4000 3900 4100

-166- 4000 3900 3500 3800 167 3500 4200 3800 4000 3800 168 3700 3800 3700 3800 3200 Page 1 of 36

Walk Over Surface Scan Coordinates I?nt 105 106 107 108 109 110 111 112 113 North 169 4100 4200 4100 170 3900 3900 3900 171 3400 3500 3700 172 3600 3900 3700 173 3400 3500 3600 174 3300 3400 3500 175 3200 3300 3400 176 3100 3200 3200 177 3300 3500 3500 3200 178 3500 3500 3300 3500 3500 179 3400 3200 3100 3300 3300 3200 180 3000 3600 3503- 3400 181 3200 3200 3100 3700 182 3300 3400 3400 183 4000 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 -1 206 207 208 ,

209 210 211 212 213 214 215-216 217 .

Page 2 of 36

Walk Over Surf ce Sc n 218 219 220 4

Page 3 of 36 l

4 1

- - .. ..-____m-_- __-._..m. ._ _____- .___. -._m.__

Walk Over Surface Sean Coordinates tint 114 115 116 117 118 119 120 121 122 North 120 121 122 123 124 125 126 127 128 2500 2400 2500 2500 129 2500 2900 2500 2800 130 2600 2600 2500 2500 2500 2500 2400 131 2500 2800 2500 2500 2400 2300 3(00 132 2500 2800 2800 2600 2500 2500 2500 133 2900 3000 3100 2900 2500 2500 2500 134 2700 2500 2700 2500 2500 2500 2500 135 2800 3000 3000 3000 2900 2800 2800 ,

136 3300 3100 rock rock 3200 2900 2900 137 3200 3500 rock rock 3100 3200 3000 .

138 3100 3200 3100 2900 3000 3000 2900 139 3100 3200 3100 3200 25(o 3000 3000 140 3500 3400 3400 3100 3000 3000 3000 141 3800 3600 3300 3200 3500 3200 3300 142 3400 3300 3000 3200 2900 2900 ,

143 2800 2800 144 2900 2900 2700 2800 "

145 2800 3000 3100 3000 146 2900 3200 3000 3200 147 3000 3000 3100 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 Page 4 of 36

Walk Over Surface Scan t Coordinates East 114 115 116 117 118 119 120 121 122 i Nutth 169 170 171 172 173 174 175 176 177 178 179 3200 3200 3300 3500 3500 3300 3400 180 3400 3400 3000 3000 3000 3300 3500 3400 181 3300 3200 3600 3200 3200 3000 3500 3600 3400 182 3300 3400 3400 3100 3000 3000 3200 3500 3200 183 3300 3300 3100 3200 3100 3000 3100 3300 3200 184 3100 3400 3000 3100 3200 3100 3100 3300- 3200 185 3500 3200 3100 3300 3000 3200 3500 3200 186 3400 3100 3200 3300 3200 2900 3$00 3500 187 3400 3200 3100 3500 3000 3000 3500 3200 188 3200 3100 3XO 3500 3200 3000 3200 3400 189 3300 3200 3100 3000 -3200 3200 3200 3200 190 3500 3200 3100 3000 3200 3000 3200 3700 191 3500 3200 3100 3200 3100 3500 3200 3700 192 3400 3200 3000 3500 3200 3200 3500 3700 193 3300 3400 3200 3500 3100 3200 3500 3700 194 -3400 3400 3100 3200 3200 3400 3500 3400 195 3400 3400 3100 3000 3200 3500 3300 3300 196 3400 3200 3000 3100 3300 3500 3000 3500 197 3400 3400 3100 3100 3600 3500 3100 3500-198 3200 3300 3300 3400 3000 3100 3100 3300 199 3300 3300 3200 3300 3100 3100 3000 3300 200 3400 3100 3000 3000 3100 3300 3300 3400 201 3300 3400 3300 202 3200 3100 3400 203 3100 3200 3200 204 3200 3200 3100 205 3200 3100 3400 206 3100 3100 3200 207 3000 3100 3500.

208 3000 3300 3500 ,

209 3000 3200 3600 210 3500 3300 3200 211 3400 3200 3200 212 3300 3200 4400 3600 3400 3400 3500 -3200 ,

213 3200 3200 3700 3600 3300 3400 3300 3100 214 3400 3100 3600 3700 3500 3300 3200 3100 215 3300 3800 3600 4600 3400 3300 3300 3400 216 3300 3500 3800 3600 3800 .3400 3400 3600 217 -3900 4100 3900 3600 4000 4000 3S00 3600 Page 5 of 36

Walk Over Surl\sce Sann 218 4100 43C0 4100 4000 38(0 3800 4(00 3600 219 4000 3$00 4200 4100 3B00 39(0 3800 3000 220 4000 4200 4600 4100 3800 3900 3600 3700 i

\.

.Page 6 of 36 t

7 y-

0 Walk Over Surnice Scan Coordi. sates Eas.t 123 124 125 126 127 128 129 130 131 i North 120 -

121 122 123 -

124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 2900 3000 3000 3000 3000 3000 3000 2900 ,

145 3000 3200 3200 3000

• 146 3400 3400 3500 147 3000 3100 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 -

165 166 167

-168 Page 7 of 36

l Walk Over Surface Sean Coonlinates East 123 124 125 126 127 128 129 130 131 North 169 1/0 171 172 173 174 175 -

176 f 177 178 179 180 181 182 3100 183 3400 184 3500 3200 185 3700 32(o 186 3400 3600 187 3500 3700 3400 188 3500 3200 3400 189 3400 3400 3700 3200 190 3700 3400 3200 3600 3600 191 3600 3600 3200 3700 3800 3700 3600 3700 4500 192 3500 3600 3600 3700 4300 3800 4000 5000 6500 193 3500 3900 3700 3600 4100 3S00 4000 4500 3700 194 3300 3700 3600 3600 3600 3600 3500 4000 3600 195 3200 3500 3600 3300 3400 3600 3500 3700 3700 196 3500 3300 3100 3300 3400 3600 3400 35CO 3700 197 3500 3700 3500 3300 3200 3700 3100 35t0 3600 198 3500 3600 3400 3500 3400 3200 3100 3700 3600 199 3200 3200 3000 3300 3300 3200 3100 3600 3500 200 3300 3400 3200 3500 3300 3400 3400 3600 3400 201 3200 3400 3200 3400 3500 3400 3400 3700 3200 202 3300 3300 3800 3100 3600 3200 3200 3900 3100 203 3500 3100 3400 3200 3300 3000 3400 3300 3000 204 3300 3100 3500 3300 3400 3000 3500 3300 3400 205 3200 3200 3500 3400 3600 3200 3500 3600 3500 206 3100 3500 3400 3400 3100 3700 3400 3400 3600 207 3400 3300 3300 3400 3300 3500 3500 3600 3600 208 3400 3200 3400 3200 3700 3400 3400 3400 3200 209 3200 3300 3400 3300 3200 3500 3300 3200 3100 210 3300 3300 3400 3500 3200 3300 3200 3200 3100 211 3200 3200 3!00 3200 3500 3600 3200 3300 3100 212 3200 3200 3300 3300 3300 3500 3100 34l0 3200 213 3300 3300 3XO 3200 3700 3500 3500 3300 3200 214 3300 3600 3300 3500 3200 3400 3500 3200 3400 215 3300 3700 3600 3700 3500 3600 3600 3600 3500 216 3800 3800 3500 3600 3500 3800 3600 3800 3500 217 4200 4000 3800 4000 3800 4000 4100 3800 3500 Page 8 of 36 1

Walk Over Surfr.ce Scan 218 4000 3600 4000 3900 3600 3800 4000 3700 3500 219 4000 3600 3800 4200 3600 3800 3700 4600 3600 220 3600 3800 3600 3400 3600 3400 3600 3300 3100 ;

Page 9 of 36

C' Walk Over Surface Scar Cu>rdinates Ent 132 133 134 135 136 137 138  !)9 140 North 120 121 ,

l 122 123  !

124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 3000 3000 2900 2900 3000 3000 3000 2000. 3000 146 3000 3000 3000 2900 2900 3000 3000 2800 3000 147 3000 3000 2800 3000- 3000 3000 3000 3000 3000 148 3000 3000 3000 3000 3100 3000 3200 2900 3000 149 3200 3200 3000 -3000-150 3300 3200 3200 151 152 153 154 155 156 157

!$8 159 160 161 162 163 164 165 166 167 168 Page 10 of 36 -

Walk Over Surface Sean Coordinates East 132 133 134 135 136 137 138 139 140 North i 169 170 4100 171 4200 172 sw sw sw sw 173 sw sw sw sw 174 sw sw sw sw 175 3500 3400-176 3200 3400 177 3200 3500 178 3400 3500-179 3500 3600 180 3500 3700 181 182 183 184 185 186 187 188 189 190 3600 4300 5500 3900 3700 4000 3700 191 4500 5500 3800 5500 4800 3400 3700 3900 4000 192 6100 000 4100 3500 3800 3200 3700 3500 4000 193 5700 10000 3800 3400 3200 3400 3400 3500 3400 194 4400 4100 3700 3300 3200 3200 3200 3300 3500 195 3300 3400 3700 3200 3000 3300 3200 3400 3500 196 3200 3500 3500 3300 3000 3100 3100 3100 3400 197 3200 3100 3300 3500 3000 3200 3200 3300 3200 198 3500 3300 3400 3600 3200 3200 3300 3100 3300 199 3600 3300 3400 3500 3000 3900 3200. 3200 3500 200 3500 3400 3400 3800 3700- 3500- 3200 3400 3200-20 3400 3400- .3000 4000 3500 3300 3400 3100 3300 202 3600 3700 3400 3800 3400- 3500 3400 3400 3300 203 3500 3600 3700 3900 3700 3200 3400 3400 3500 204 3500 3600- 3800 4400 3500 3300 5800 3200 3400 205 3500 3600 4100 3600 3900 3500 3400 3500 3400 206 3700 3500 3800 3500 3700 -3100 3100 3600 3500 207 3800 3700 3500 3400 3500 3200 3100- 3400 3500 208 3400 3100 3200 3300 3200 3100 3300 3300 3300 ,

209 3100 3200 3300 3500 3400 3300 3500 3400 3400 210 3300. 3300 3400 3500 3300' 3100 3300 3500 3500 211 3100 3100 3100 3200 3200 3200 3200 3200 3300 212 3100 3100 3300. 3400 3300 3400 3600 3200 3400 213 3600 3200 .3500 3600 3600 3400 3600 3300 '3600 214 3500 3200 4000 3500 3800 3800 3800. 3300 3600 215 3600 3400 4000 3600- 3800 4000 3800 3500 3600 216 3700 4100 3700 4000 3900 4400 4100 3800 3800 217 3800 3800 3700 3900 3800 4200 4300 4000 Page 11 of 36

Walk Over Surface Secn 218 3500 3600 3400 3900 3200 4200 42(O 219 3600 3400 3200 3400 3000 3600 220 3300 3100 3300 3100 4

Page 12 of 36 1

Walk Over Surfiice Sean  ;

Cmrdinates East 141 142 143 144 145 146 147 148 149 >

North 120 121 122 123 124 125 126 i 127 i 128 129 130 131 132 133 134 135 136 )

137 138 139 140 141 142 ,

143 144 145 2800 2900 3100 3100 3100 3000 3300 3200 3100 146 2700 3000 3300 3400 2900 3200 3700 3000 3200 ,

147 2800' 3000 3400 3500 2800 3400 3800 3300 3200 148 2800 3200 3300 3300 3100 3900 3700 3400 3300 149 2900 3000 3200 3300 3100 3500 3200 3500 3200-150 3200 3400 3200 3100 3000 3500 3500 3200 30C0 15! 3200 3200 3200 3000 2900 3200 3100 152 3000 3400 3200 3100 -3000 3400 3100 153 3200 3200 3200 3100 3000 3200 3000 154 3500 3200 3300 3200 3400 3100- 3900 ,

155 3400 3200 3000 3200 3400 3100 3000 156 3300 3100 2700 3100 3200 3000 3000 157 3200 3200 2900 3100 3000 3000 3100 158 3400 3000 3000 3000 3000 3000 3200 159 3300 3000 3000 3000 3000 3100- 3000 160 3200 3000 3200 3200 3100 3000 3900 161 3400 2900 3000 3100 3000 2900 3000 162- 3500 3000 2900 3200 3000. 30C0 3000 163 3400 3000 3100 3200 3200. 2900- 3000 164 3500 3100 3000 3300 3400 3000 3200 165 3500- 3300 3000 3300 3300 3200 3300 166 3200 3200 3000 3400 3200 3000 3300 167 3200 3300 3300 3200 3100 3000 3200 168 3000 3100 3200 3200 3200- 3200 3000 Page 13 of 36

l

. 1 i

,' Walk Over Surface Sean C a mlinstes East 141 142 143 144 145 146 147 148' 149

~

North 169 3000 3000 3100 3200 3300 3400 3300 170 3400 3300 3500 3200 3000 3100 3200 30C0 2500 171 3800 3600 3500 3500 3000 3000 3200 3000 2000 172 sw sw sw sw sw sw sw sw sw 173 sw sw sw sw sw sw sw sw sw I 174 sw sw sw sw sw sw sw sw sw l 175 3400 3500 3400 4000 3400 3700 3500 3500 3400 176 3400 3500 3700 3500 3300 3500 3500 3400 3400 177 3500 3500 3600 35tc 3300 3800 3500 4000 3900 178 3200 3700 3500 3800 9300 4000 3500 3800 3900 179 3700 3800 3500 3800 6500 4000 4200 3600 3500 180 3800 40C0 181 182 183 184 185 186 187 188 189 190 3400 3600 3600 3600 3300 3200 3400 191 3600 3700 3800 3400 3300 3400 3600 192 3400 3600 3400 3600 3500 3500 3600 193 3700 3600 3200 35r0 3700 3700 3500 194 3600 3600 3500 3600 3600 3400 3900 195 3200 3700 3500 3500- 3800 3600 4700 196 3300 3500 5700 3500 3900 4200 3500 197 3400 3300 3200 3600 3700 4800 3600 198 3500 3300 3200 3400 3300 3700 3500 3600 3500 199 3500 3500 3300 3400 3400 3800 3200 3400 3400 200 3200 3200 3000 3300 3500 3200 3200 3400 3500 201 3200 3300 3200 3200 3500 3100 3500 3500 3300 202 3000 3400 3200 3100 3400 3200 3400 3300 3600 203 3300 3000 3200 3100 3300 3000 3400 3400 3500 204 3300 3300 3300 3100 3300 3200 3400 3600 3500 205 3400 3400 3400 3400 3400 3500 3700 3400 3000 206 3400 3500 3300 3400 3500 4500 3600 3500 3500 207 3300 3400 3500 3400 3500 3400 3600 3600 3500 208 3500 3400- 3600 3600 3303 3200 3700 3600 3500 209 3600 3600 4200 3600 3500 3400 3700 3500 3400 210 3400 3600 3400 3700 3500 3700 3700 3500 3500 211 3200 3500 3400 3500 3500 3500 3400 3200 3300 212 3200 3300 3600 3600 3400 3400 -3400 213 3400 3300 3500 3400 3300 3600 214 3200 3500 3600 i 215 3300 3600 216 3600 217 Page 14 of 36'

t

, Wtilk Over Surftice Sc:m 218 '

219 220 ,

i f

Page 15 of 36

Walk Over Surfhce Scan  :

t Coordinates East 150 151 152 153 154 155 156 157 158 North 120 121 j 122 123 124 125 126 127 128 129 130 131 132 '

133 134 135 136 137 138 139 140 141 142 143 1 44 145 drive drive . drive drive drive drive drive bldg bldg 146 drive drive drive drive drive drive drive . bldg bidg 147 drive drive drive drive drive . drive drive bldg ' bldg 148 drive drive drive drive drive drive drive bldg bldg 149 drive drive drive drive drive . drive drive bldg bldg 150 drive drive drive drive drive drive, drive bldg bldg 151 drive drive drive drive drive drive drive bldg bldg 152 drive drive drive drive drive drive drive bldg bldg .

153 drive drive drive drive drive drive - drive b!dg ' bldg -

154 drive drive drive drive drive drive drive- bldg ' bidg 155 drive drive drive drive drive . drive drive bldg bldg 156 drive drive drive drive drive drive drive tank tank -

157 drive - drive drive drive drive drive drive tank tank 158 drive drive . drive drive drive drive drive tank tank -

159 drive drive drive ' drive drive drive . drive tank - tank -

160 drive drive drive drive drive drive drive tank -tank 161 drive drive drive drive drive drive drive tank tank 162 drive drive drive drive drive drive - drive tank' tant, 163 drive drive drive diive drive d ive drive ' tank tut -

l- 164 drive drive drive drive drive drive drive tank tank 165 drive drive drive - drive drive - drive drive - tank tank 166 drive drive drive drive drive - drive drive. tank tank l 167 drive drive drive drive drive drive drive ' tank tank l 168 drive drive drive drive drive drive - drive tank ' - tank Page 16 of 36

[ .

. .. u. ,, , - - -- --

o Walk Over Surface Scan Cmrdinates IIast 150 151 152 153 154 155 156 157 158 North '

169 drive drive drive drive drive drive drive tank tank 170 2800 2800 2900 2900 3000 3300 3300 3200 3200 ,

171 2900 3000 3100 3000 3200 .3200 3200 3000 3000 172 sw sw sw sw sw sw sw sw sw 173 sw sw sw sw sw sw sw sw sw 174 sw sw sw sw sw sw sw sw sw 175 3600 3400 3300 3500 3700 ~3800 3300 3200 3300 176 3300 3600 3400 3500 3500 3500 177 3400 3900 3400 3700 3500 3500 178 3700 3700 3500 36CO 179 3600 160 181 182 183 l

184 l 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 3500 3700 4500 4300 200 3700 3800 3600 7000 3800 5500 4000 4100 4200 201 3700 4500 4000 3700 4000 4100 4900 4200 4400 202 3500 3900 4100 3700 4100 4100 3500' 4000 4200-203 3S00 4200 4000 4100 3600 4200 3800 3600 4200-204 3900 3900 3900 $100 3800 .4000 3900 3600 3600-205 3700 3600 3700 4000 4000 3000 3600 3700 3900 206 3500 3600 4200 3600 4600 3800 3600 3400 3600 207 3200 3800 3600 3600 3900 3400 4100 3300- 3900 208 3200 3400 3600 3700 4000 3500 4100 3700 209 3400 3600 3700 3700_ 3900 rockpile 210 320C 3300 3700 3900 rockpile 211 3200 3600 4000-212 213 214 215 216 217 Page 17 of 36

, 1

. t Walk Over Surface Sean l i

i I

218 219 '

220 i

l 1

J i

i l

i t

Page 18 of 36 -

Wall: Over Surface Scan  :

Coordinates

!!ast 159 160 161 162 163 164 165 166 167 North 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 bldg bldg bldg bldg bldg bldg bldg bldg 146 bldg bldg bldg bldg bldg bldg bldg bldg 147 bldg bldg bldg bldg bldg bldg bldg b!dg -

148 bldg b!dg bldg bldg b!de bldg bldg bldg 149 bldg bldg b!dg bldg bldg bldg bldg bldg 150 bldg bldg bldg bldg bldg b!dg bldg . blJg 151 bldg bldg bldg bldg bldg bldg bldg bldg 152 bldg bidg bldg bldg bldg b!dg = bldg bldg 153 bldg bldg bldg bldg bldg bldg bldg _ bldg 154 bldg bldg bldg bldg bldg bldg bldg bldg 155 bldg b!dg bldg bldg ' bldg bldg bldg bldg 156 tank tank tank tank tank tank tank tank 157 tank tank tank . tank tank tank tank tank 158 tank tank tank tank tank - tank tank tank 159 tank tank tank tank tank tank tank tank 160 tank tank tank tank tank tank tank tank tar 161 tank tank tank tank tank tank tank tank' 3700 162 tank tank tank tank tank- tank tank tank 3000 163 tank tank tank tank tank -tank tank - tank ' 4400 164 tank tank tank tank tank tank tank - tank 5500 165 unk tank - tank tank tank tank tank tank 8200 166 tank ' tank tank tank tank tank tank tank 4700 167 tank tank tank tank tank tank tank tank 4000 168 tank tank tank tank tank tank tank tank 4000=

l Page 19 of 36

Walk Over Surface Sean Coordinates Ea.=t 159 160 161 162 163 164 165 166 167 North 169 tank tank tank tank tank tank tank tank 4700 170 3500 3300 3300 3400 3800 3500 3500 3500 3500 171 3500 3400 3400 3200 3800 3300 3400 3600 3203 172 sw sw sw sw sw sw sw sw sw 173 sw sw sw sw sw sw sw sw sw 174 sw sw sw sw sw sw sw sw sw 175 3500 3200 3500 3400 3200 3200 3200 3600 3200 176 3600 3500 3700 3200 3000 2200 3300 3400 3200 177 3300 3500 3400 3400 3000 3300 3300 3500 3500 178 3500 3700 3300 3500 3300 3400 3400 3500 3900 179 3200 3500 3500 3800 3300 3400 3400 3500 4100 180 3200 3400 3600 3400 3300 3500 3500 4200 3800 181 3200 3500 3300 3400 3300 3500 3500 3600 3700 182 3400 3500 3500 3300 3400 3500 3500 3700 3500 183 3500 3400 3400 3800 3400 3400 3500 3500 3500 184 3500 3400 3500 3500 3500 3700 3500 3500 3500 185 3400 3400 3400 3500 3600 3500 3400 3500- 3500 186 3300 3300 3700 4000 3700 3600 3500 3600- 3700 187 3200 3500 3800 4000 3500 3700 3400 3700 3700 188 3200 4000 3700 4000 4000 3700 3300 3800 4000 189 3400 3900 4000 4100 3500 3800 3500 3800 3500 190 4000 3600 3500 3600 4000 3800 4100- 3900 4100 191 4200 4100 4100 192 3800 4100 4100 193 3800 3800 4000 194 3400 '3700 4200 195 3800 4100 4100 196 4300 3900 4200 197 4600 4000 4900 198 4100 3900 4300 199 3800 3900 4100 200 4600 4200 4100 4000 4100 3800 4100 3600-- 4200 201 4500 5000 3700 3200 3700 3500 3500 3000 3500 202 4300 .4200 3700 3200 3600 3500 3500 3500 3700 203 3800 3400 3500 3300 3300 3500 3300 3300 204 3600 3600 3600 3300 3300 3400 3400 205 3600 3300 3400 3300 3400 .3500 206 3500 3600 3300 3500 3400 3600 207 3500 3800 3500 3400 208 209 210 211 212 213 214 215 216 217 Page 20 of 36

, Walk Over Surface Scan 218 <

219 i

220 ,

P

-F V

Page 21 of 36

. . . ~ _ . _ _ . _ _ -_. _ __ .. . . . _ _ .

/ Walk Over Surface Scan i Nrdiriates East , 168 169 170 171 172 l 471 174 175 176 North 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 tar tar tar tar tar tar sw sw sw 161 3200 3200- 3000 3000 3200 3000 sw sw sw 162 3400 3500 3200 3200 3500 3100 sw sw sw 163 3400 3500 3700 3400 3500 3200 sw sw sw 164 3300 3700 3200 3500 3500 3000 sw sw sw .

165 3500 3600 3200 3400 3600 3500 sw sw sw 166 3800 3600 3500 3600 4000 3800 sw sw sw .

167 3600 3600 3400- 3800 3600 3800 rw sw. sw 168 3600 3600 3200 3700 3900 3300- sw sw sw Page 22 of 36

. 1 5

4 Walk Over Surfure Sean Coor litales East 168 169 170 171 172 173 174 175 176 North 169 3500 3500 3200 3200 3500 3200 sw sw sw 170 3200 3400 3400 3000 3?.00 3200 sw sw sw 171 3200 3100 3500 3100 3300 3000 sw sw sw 172 sw sw sw sw sw sw sw sw sw 173 sw sw sw sw sw sw sw sw sw 174 sw sw sw sw sw sw sw sw sw 175 3000 3000 3000 290ie 3100 3000 3200 3700 3000 176 2900 3000 3000 2000 3200 3000 3300 3200 3000 177 3000 3500 3000 3200 3200 3200 3200 3300 3400 178 3000 3700 3000 3200 3200 3800 3300 3700 4000 179 3200 3800 3200 3300 3400 3900 3700 3$00 3400 180 4000 4500 3900 4000 3200 3400 3400 3500 3800 181 3500 4000 3700 3600 3200 3600 3700 4000 3900 182 1500 4000 3700 4000 3400 3600 3500 3600 4000 183 3500 4000 3500 3500 3400 3800 4000 4000 3800 184 3700 3600 3400 3400 3700 4200 3900 4100 3700 185 3900 3500 3500 3400 3900 3900 3800 4100 3900 186 4000 3600 3400 3800 5300 3800 4000 3800 3700 187 4100 3700 3300 3800 4000 3800 3800 3600 3500 188 4000 3700 4000 4000 4000 4000 3500 3700 4400 189 4200 3800 3900 3800 3900 3600 5500 3800 7500 190 3800 4400 3900 4100 3800 3900 3800 4000 3700 191 8000 4000 4000 3900 3900 3900 3800 3900 3900 192 4400 3900 3800 3700 3800 3S00 3900 4100 4100 193 4000 3900 3900 3700 3800 3900 4200 4200 3800 194 4100 4000 4000 3400 3700 3800 3900 4000 3900 195 3800 3900 4000 3500 3700 3400 3700 3700 3800 196 3900 4200 3900 3400 3600 3900 3600 3600 4100 197 3900 4000 3600 3400 3400 3400 3800 3400 3800 198 3300 3500 3300 3900 3800 3600 3800 3600 rockpile 199 3400 3300 3100 rockpile 3700 3600 rockpile rockpile rockpile 200 3300 3200 3300 rockpile 4000 rockpile rockpile rockpile 201 3700 rockpile rockpile rockpile 202 3800 203 204 7

205 206 207 208 ,

209 210 211 212 213 214 215 216 217 i Page 23 of 36

Walk Over Surface Scan 218 219 220 i

f I

Page 24 of 36

i Walk Over Surface Scan l

Coordinates Eat 177 178 179 180 181 182 183 184 185 North 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 $

137 138 139 140 141 142 143 a 144 145 146 147 148 149 150 151 a 152 153 154 155 156 157 158 159 160 3000 3200 3400 3300 3400 3500 3300 3500 3500 161 3300 3100 3200 3200 3300 3300 3400 3700 3600 162 3000 3000 pit pit pit pit pit pit pit 163 3200 3000 pit pit pit pit pit pit pit 164 3000 3000 pit pit pit pit pit pit pit 165 3200 3000 pit pit pit pit pit pit pit 166 3200 3200 pit pit pit pit pit pit - pit 167 3400 3200 pit pit pit pit pit pit pit 168 3000 3000 pit pit pit pit pit pit pit Page 25 of 36 l

u lriu - .

1 -

Walk Over Surface Scan Coordinates East 177 178 179 180 181 182 183 184 185 North 169 3000 3000 pit pit pit pit pit pit pit 170 3100 3500 pit pit pit pit pit pit - pit 171 3000 3400 pit pit pit pit pit pit pit 172 sw sw sw sw sw sw sw sw sw 173 sw sw sw sw sw sw sw sw sw 174 sw sw sw sw sw sw sw sw sw ,

175 3000 3000 3200 3000 3100 3200 3000 3200 3200 176 3000 3000 3300 3100 3100 3000 3000 3400- 3100 177 3000 3300 3000 3200 3200 3200 3100 3500 3000 178 3100 3500 3500 3200 3300 3500 3100 3300 3200 179 3100 3500 3500 3400 3200 3400 3000 3500 3300 180 3800 4100 3600 3400 3400 3500 3400 3400 3700 181 4100 4200 4000 4000 3400 3300 3500 3400 3200 182 3700 4100 4400 4400 3500 3300 3500 3500 3200 183 3900 4100 4200 4200 3800 3300 3400 3400 3200 184 3900 3800 3800 4000 3700 3300 3400 3000 3300 185 4200 3800 3700 3800 3200 3500 3300 3200 3200 186 3800 3800 3800 3700 3300 3300 3300 3400 3300 187 3900 3800 3800 3900 3500 3400 3300 3600 3200 188 4200 4100 4000 4100 3500 3500 3400 3600 3200 189 4400 4400 4100 4000 3500 3600 3200 3500 3200 190 4000 4200 4400 4200 3500 3400 3400 3300 3300 191 4000 4100 3800 4000 3700 3500 3500 3300 3200 192 4000 4100 4000 4600 3700 3500 3200 3500 193 4400 4000 3800 4100 3400 3500 3200 3500 194 4200 3800 4200 3800 3500 3500 195 3900 3900 4500 3500 3700 196 3600 3700 3900 3700 i 197 3700 3600 rockpile rockpile 198 rockpile rockpile rockpile rockpile 199 rockpile 200 201  !

202 203 244 205 206 207 208 209 210 211 212 213 214 215 216 217 Page 26 of 36-

Walk Over Surface Scasi 218 l 219 220 e

l.

Page 27 of 36

Walk Over Surface Scan Coordinates East 186 187 188 189 190 191 192 193 194 North 120 121 122 123 124 125 126 127 128 129 130 131 ~_

132 133 134 135 136 137 138 139 140 141 142 143 -

144 145 146 147 148 149 _

150 151 152 153 154 155 156 157 158 159 160 3300 3200 3300 3700 4400 3200 3200 3200 3200 161 3400 3200 3100 3000 3200 3100 3300 3300 3100 162 pit pit pit 3000 3200 3000 3400 3400 3000 163 pit pit pit 3000 3300 3200 3400 3400 3000 164 pit pit pit 3200 3500 3200 3000 3500 3400 165 pit pit pit 3300 3300 3200 3100 3500 3300 166 pit pit pit 3200 3400 3400 3200 3100 3400 167 pit pit pit 3100 3400- 3700 3400 3200 3400 168 pit pit pit 3200 3300 3400 3300 3200 3300 Page 28 of 36

Walk Over Surface Scan '

Coordinates East 186 187 188 189 190 191 192 193 194 North 169 pit pit pit 3200 3300 3400 3300 3300- 3200 170 pit pit pit 3400 3000 3400 3200 3300 3100 171 pit pit pit - 3200 3200 3000~ 3500 3400- -3300 172 sw sw sw sw sw sw sw sw sw 173 sw sw sw sw sw sw sw ' sw sw 174 sw sw sw sw sw sw sw- sw sw 175 3000- 3000 3000 3000 3200 3000 3000 3300 3000 176 3000 3000 3200 3000 3000 3300 3200 3400 3000 177 3000 3000 3200 3000 3000 2900 3300 3700 3000 178 3200 3000 3000 3000 3100 2900 3400 3400 3200 179 3300 3100 3000 3000 3000 3000 3300 3300 3100 180 3500 3200 3100 3000 3000 3000' 3000- 3500 3200 181 3900 3000 3000 3000 3100 2900 3000 3500 3200 182 3900 3100 3300 2900 3000 2800 3000' 3300 3300 183 3500 3200 3200 2900 3000 3000 3000 3000 3000 184 3200 4500 3400 3000 3000 3000 3200 3000 3000 185 3300 3900 3500 3000 3000 310G 3100 3000. 2800-186 3500 3900 3400 3000 3200 3200 3200 3000 '2800 187 3000 3500 3100 3200 3200 3200 '3400 3000 '3200 188 3000 3200 3200 3200 3000 3200 3300 3100 189 3200 3000 3300 3300 190 3200 3200 3000 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 ,

209 210 211 212 213 214 215 216 217 Page 29 of 36

.' Walk Over Surface Scan 218 219 220 a

l Page 30 of 36 j

l

,' Walk Over Surface Scan l

Coordinates East 195 196 197 198 199 200 201 202 203 North 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 3200 3500 3500 4200 3800 4000 161 3500 3500 3500 3500 3700 3700 3700 162 3500 3300 3400 3500 3200 3500 4000 4000 163 3200 3400 3500 3400 3400 4000 3900 3500 3500 164 3000 3500 3500 3300 3500 4000 3500 3500 3800 165 3000 3400 3400 3300 3400 3900 3500 3500 3800 166 3200 3300 3300 3400 3300 3500 3500 3600 3500 167 3100 3500 3800 3300 3300 3500 3600 3300 3300 168 y 3200 3500 3400 3100 3200 300C 3 3200 3400 3400 Page 31 of 36 1

i

- - - ~ ~ _ . _ _ _ _ _ _ _ . - - - _ - - - - _ - - - . _ _ . - - _ - . _ _ - - _ - . _ _ _ . _ _ - _ - - - _ _ -

,' Walk Over Surface Scan Coordinates East 195 196 197 198 199 200 201 202 203-North 169 3000 3500 3300 3000 3200 3400 3000 3400 -3200 170 3100 3400 3300 3300 3100 3200 3100 3300 3200 171 3200 3200 3300 3200 3000 3200 3200 3100 3200 172 sw sw sw sw sw sw sw sw sw 173 sw sw sw sw sw sw sw sw sw 174 sw sw sw sw sw sw sw sw sw 175 3200 3000 3100 3000 3100 163000 3000 176 3000 3000 3200 3000 3100 3000 3000 177 3100 2800 3000 3200 3200 3100- 4000 178 3100 3000 3000 3000 3200 3100 179 3200 3000 3000 3100 3000 3200 180 3200 3200 3200 3000 3000 3100 3200 3200 181 3200 3300 3100 3400 2800 3200 3100 182 3200 3500 3300 3300 3000 3200 183 3100 3400 3200 3200 3300 184 3100 3400 3200 3500 185 3200 3200 3200 186 3200 3200 187 3200 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 Page 32 of 36

,- Walk Over Surface Scan Coordinates -

East 204 205 North 169 3300 3000 170 3200 3200 171 3200 3300 172 sw sw 173 sw sw 174 sw sw 175  !

l 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191

--192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 Page 35 of 36

9 6

, Walk Over Surface Secn 218 219 220 Page 36 of 36

f&tWWctN _

pl ORISE OAK klDOF INSitfuTE POW SCif NCf AND # DUCAfiON-l' Nt RGY/F NVtRONME NT SY S T E Mb L5WIStCsN

_p 1

December 10,1992

~

Mr. Jerome Roth-Region I U.S. Nuclear Regulatory Commission 475 Allendale Road King of Prussia, PA 19406

SUBJECT:

CONFIRh1ATORY RADIOLOGICAL SURVEY PLAN FOR TILE TEXAS INSTRUh1ENTS INCORPORATED - BURIAL SITE, ATTLEBORO,-

AIASSACllUSETI'S -

Dear Mr. Roth:

Enclosed is a copy of the subject document. As discussed in our earlier phone conversation, on-site activities have been scheduled for December 15-16, 1992.

~

If there are any. questions, please direct them to me at (615) 576-3355 or Michele Landis at-(615) 576-2908.

Sincerely, . _

( -

-- Armin Jabera oansari Project Leader

. Environmental Survey and Site Assessment Program AJ:tte .

cc: J. Parrott, NRC/NMSS, 6H3

T. Mo, NRC/NMSS, 6H3 N

- D. Tiktinsky, .NRC/NMSS, 6H3 -

J. Swift /F. Brown, NRC/NMSS, 6H3 J. Kinneman, NRC/ Region 1 M. Landis, ORISE

-J. Berger, ORISE=

PMDA, 6E6 - 3 File /205 P O. BOX ll7.- OAK RIDGE, TENNESSEE 378310117 :--

Managed and operatai by Cok Ridge Anocicimi Universities Inc the U.S. Department of Energy -

_ _ _ u__ --

i CONFIRMATORY SURVEY PLAN FOR TIIE TEXAS INSTRUMENTS INCORPORATED llURI AL SITE, ATTLEllORO, M ASSACllUSETTS SITE lllSTORY AND DESCRIPTION The Texas Instruments incorporated site at Attleboro, Massachusetts, was owned and operated by Metals and Controls (M&C) until 1959, at which time M&C merged with Texas Instruments, Inc. The General Plate Division of M&C began processing nuclear materials in 1952, and between 1952 and 1959 fabricated uranium foils for reactor experiments and fuel components and complete reactor fuel cores for the U.S. Navy. Source material license D-549 was issued permitting acquisition and title to not more than 22.7 kg (50 pounds) of ref'med source material for use in the production of uranium foils; additional source material was acquired and used under contract with U.S. Government. Special nuclear materials license No. SNM-23 was issued, permitting acquisition and title to 110 kg of enriched uranium for fabrication of the fuel components and cores. After the merger in 1959, Texas Instruments continued fabricating reactor fuel cores, primarily for research and production reactors. Also, source materials, i.e.,

natural uranium and thorium, were still being fabricated for sale to various corporations.

A 1964 Texas Instruments health and safety - manual states that uranium- and _

thorium-contaminated noncombustible scrap material and machinery were collected in 55-gallon steel drums and were disposed of through authorized agencies, or were buried on-site in compliance with 10CFR20.304. Burials were made from 1958 to 1961, and the burial site was closed in 1967. Records indicate two known burials, one in 1958 of contaminated ductwork, and one in 1961 of 28.4 mci of enriched uranium noncombustible scrap. Work with nuclear -

materials was gradually reduced beginning in 1968 and was terminated in 1974. The interior of the facility was decontaminated and released for unrestricted use by the Nuclear Regulatory Commission (NRC) in 1983.

Prepared by the Environmental Survey and Site Assessment Program of Oak Ridge Institute for Science and Education, Oak Ridge, TN, under interagency agreement (NRC Fin. A-9076) between the U.S. Nuclear Regulatory Commission and the U.S. Department of Energy.

Teus huuumems December 10. !W2 )

_ .. ~ _ _ ._

.., 3 l

l 9

The Texas Instruments Inc. Facility, Attleboro, MA is located in North Attleboro, approximately 48 kilometers south of Boston. The Radiological Site Assessment Program, predecessor to the Environmental Survey and Site Assessment Program, of the Oak Ridge Associated Universities -

(ORAU) conducted a radiological survey of portions of the facility's outdoor areas during April and May,1984. The results of that survey indicated several areas with surface and/or subsurface uranium concentrations in excess of guidelines.'

Texas Instruments Inc. has completed the cleanup and final survey _ activities at the burial site located between Buildings 11 and 12. The excavated area at the burial site is approximately-1600 m2 and the average depth of the excavated area is approximately 1.5 meters. The U.S.

Nuclear Regulatory Commission, Region I Office, has requested that the Environmental Survey and Site Assessment Program (ESSAP) of the 0ak Ridge Institute for Science and Education (ORISE) perform an independent confirmatory survey of the excavated area itt the burial site.

OlljECTIVE The objective of a confirmatory survey is to provide independent document reviews and radiological data, for use by the NRC in evaluating the adequacy and accuracy of the licensee's radiological status report, relative to established guidelines.

RESPONSIBILITY-Work described in this survey plan will be performed under the direction of Michele Landis, ,

Project Manager and Armin Jaberaboansari, Project Leader with ESSAP. The cognizant site supervisor has the authority to make appropriate changes to the survey procedures as deemed necessary. After consultation with the NRC site representative, the scope of the survey plan may be altered. Deviations to the survey plan or procedures will be documented in the site log book.

Teus Instnmwnt., - December 10,1992

q .- .

DOCUMENT ItEVIEW ESSAP will review the licensee's radiological survey data. Procedures and methods utilized by the licensee will be reviewed for adequacy and appropriateness, The post-remedial action data will be reviewed for accuracy, completeness and compliance with guidelines.

PltOCEDUltES Survey activities will be conducted in accordance with the ORISE ESSAP Survey Procedures Manual. Specific procedures applicable to this survey are listed on page 4 of this survey plan.

IREFEl(ENCE GillD A 10 m grid was established during ESSAP's radiological survey of the area in 1984 which w subsequently used by the licensee.2 The same reference grid will be used in this survey SUltFACE SCANS 2

Surface scans of the excavated and 'the surrounding ' area (approximately 10,000 m ) will be performed using NaI detectors coupled to countrate meters with audible indicators. Areas of elevated direct radiation will be noted for further investigation.

SOIL SAMPLING

Surface soil samples will be obtained from ten randomly selected grid line intersections. Ten to fifteen samples wil! be obtained from the overburden piles. Additional soil samples will be obtained from locations of elevated direct radiation, identified by surface scans, or at specific ~

locations based on previous ESSAP and/or licensee's survey results.

Tetas Instnanents December 10,1992 3

SAMPLE ANALYSIS AND DATA INTERPRETATION Samples and data will be returned to ORISE's ESSAP laboratory in Oak Ridge, TN for analysis and interpretation. Soil samples will be analyzed by gamma spectrometry. Approximately 10%

l of the soil samples will be analyzed by alpha spectroscopy for isotopic uranium.  ;

The data generated will be compared with the licensee's documentation and NRC guidelines established for release to unrestricted use. Results will be presented in a report and prov i ded to the NRC for review and comment. Data at.d samples collected as a part of this survey will be archived by ESSAP.

GUIDELINES The soil concentration guideline, for enriched uranium, is 30 pCi/g.3 TENTATIVE SCIIEDULE Measurement and Sampling December 14-15, 1992 Sample Analysis January,1993 Draft Report April,1993 LIST OF CURRENT PROCEDURES Applicable procedures from ORISE ESSAP Survey Procedures Manual include:

Section 5.0 Instrument Calibration and Operational Check-Out 5.1 General Information l

5.2 Electronic Calibration of Ratemeters l

! 5.3 Gamma Scintillation Detector Check-Out and Cross Calibration

! 5.4 -Alpha Scintillation Detector Calibration and Check-Out Teus Instnunents . Deccmixt 10.1992 4

[.

5.5 GM Detector Calibration and Check-Out 5.13 Field Measuring Tape Calibration Section 6.0 Site Preparation 6.2 Reference Grid System Section 7.0 Scanning and Measurement Techniques 7.1 Surface Scanning Section 8.0 Sampling Procedures 8.1 Surface Soil Sampling 8.9 Sample Identification and Labeling F

(

Section 9.0 Integrated Survey Procedures 9.1 Background Measurements and Baseline Sampling 9.2 General Survey Approaches and Strategies Section 10.0 Health and Safety and Control of Cross Contamination o

Sectic 'l.0 Quality Assurance and Quality Control Texas Instnutwnts . December 10,1992 5

i P .

~

l REFERENCES

1. " Radiological Survey of the Texas Instruments Site, Attleboro, Massachusetts," Oak ,

Ridge Associated Universities, January,1985.

2. " Post Excavation Radiological Survey Report, Texas Instruments incorporated Burial Site, Attleboro, Massachusetts," Creative Pollution Solutions, Inc., November 28,1992.

3. " Guidelines for Decontamination of Facilities and Equipment Prior to Release for Unrestricted Use or Termination of Licenses for Byproduct, Source or Special Nuclear Material," U.S. Nuclear Regulatory Commission, Division of Fuel Cycle and Material

- Safety, Washington D.C., August 1987.

Texas lastrununu Deermber 10.1992 6

- - - , , ._, c - -

a

APPENDIX A COST ESTIMATE

• CONFiltMATOltY SUltVEY FOlt Tile TEXAS INSTitUMENTS INCOltPOllATED llUlt!AL SITE, ATTLEllOltO, hi ASSACIIUSETTS Plan Prpparation - $4,300 Plan preparation includes the following activities: document reviews, survey plans, trip planning and the cost and time estimates.

On-Site Activities - $18,300 On-site activities will include 6 man-days at the site performing the following: gamma scans and soil sampling, The on-site expenses also include trip preparation (equipment calibration and packing),

travel to and from the site (airlines and rental .nicles), hotel expenses, and per diem, unpacking equipment, and logging in samples.

Sample Analysis - $6,600 Includes analysis of soil samples by gamma spectrometry and analysis of selected samples by alpha spectroscopy for isotopic uranium, esp 2rt Prenaration - $7,700 The report preparation will include the following activities: tabulation of data, illustration, and writing and reviewing the final draft, final or interim report, ' word processing and reproduction.

Tens instnanents December to, IW2 -7

IntaLCmLEsti. mate - 536,900 ,

1 I

• Estimates arefor sun'ey of all areas listed in the NRC Requestfor Technical Assistance l received by ESSA P. Reduction or increase in the number of areas being surveyed would result in changes to the original estimate in the 'on-site activities " and " sample analyses ~  !

I categories. Due to the nature ofthe survey, this estimate is a best guess site and weather conditions and survey findings may change the scope of the survey and increase or decrease the cost estimate. 7he NRC site representative will be nonfled ifmajor changes to the scope of the survey need to be taken, i

l l

Tem insinnnenta - December 10.1992 . 8

V '

508 384 6028-r; 11'19<92 09:12 esos,3s4 8028 . , , Smus E.w n. ,

goo;

-e EXC4VATION AREA AS OF 11/6/92 MEM -

APPROIDfATE EI.EVATIONS 'SU'A'N c

f '

p..,, .

, ,, ,7 s 1 a lN, - ---- -

~~ *

~ -

4.2:1 -

W 16 )

l

-_ l% _

~'

-.J.L$ ,- -

i-y,,,

iw . #

s 4

2

} Y( h hf $ $llp'

.a' e

c A

/ e -

1. l! F

,a  ?

s

-]

h \

p

g. . .;

[

. I

{- g:9.L L -,

I,a s U n.6 9 ' 3w,J,  ; . .i-  :: 4 s

-y g, > w. *

\Y 9. g .

,s.  : -

f.'. .u

_, -< 5 _

'- I.

{ y ,

-  % dias $',I k t; .

W/D1@ % -

I /ntP=Rd, . -

m.

'-t 1

IIl ll [\ \\ (\ 1 is ,.

DNDk'6Vd n n -

- a y

1

.