ML20210K283

Final Radiological Surveys of Selected Bldg 2 Labs for Release to Unrestricted Use Group 11

ML20210K283
Person / Time
Site:	07000734
Issue date:	07/31/1999
From:	Lyons B, Maschka P, Stanley C GENERAL ATOMICS (FORMERLY GA TECHNOLOGIES, INC./GENER
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ML20210K279	List: ML20210K275 ML20210K283
References
PROC-990731, NUDOCS 9908060052
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{{#Wiki_filter:I I I k ***"'m dromics I FINAL RADIOLOGICAL SURVEYS I OF i SELECTED BUILDING 2 LABORATORIES l FOR RELEASE TO UNRESTRICTED USE " GROUP 11" s I I l July 1999 j I \\ I Prepared by: Paul R. Maschka, Cornelius Stanley, Barbara Lyons, Phil Poole, Richard Stowell, Steve Finchum, and Laura Gonzales I I I PDR ADO O O O 34 B PDR

+M Building 2 Group 11 TABLE OF CONTENTS Page LIST OF TABLES.. . ii LIST OF FIGURES..............................................................iii INTRODUCTION ..............................................................I I SITE DESCRIPTION .1 CRITERIA FOR RELEASE TO UNRESTRICTED USE.............................. 2 PREVIOUS ACTIVITIES (HISTORY OF USE)......... .2 IN STRUM ENTATI ON........................................................... 3 B ACKGROUND MEAS UREMENTS.............................................. 3 S U R VE Y P L AN........................................................... 4 DECONTA M IN ATION......................................................... 4 RESULTS OF THE FINAL SURVEYS............................... ..5 Comparison of Site Decommissioning Requirements with Survey Performed.......... 5 Scanning............................................................5 F ixed M ea su re m e nts...................................................... 6 Removable Contamination Surveys.......................................... 6 Exposure Rate Measurements........................................... ..6 INTERNAL CONFIRMATORY S URVEY......................................... 6 C ON C L U S I O N.............................................................. 7 TABLES.....................................................................8 FIGURES.... ...........................................................29 APPENDIX A: Results of Supplemental and Internal Confirmatory Surveys Performed I I I g I

I +' M""' Building 2 Group 11 LIST OF TABLES EilEt Table 1: USNRC's Acceptable Surface Contamination Levels. ....9 Table 2: State of CA Acceptable Surface Contamination Levels 10 Table 3: List of Instruments................ ....11 Table 4. Background Measurements and MDA'S......... .. 13 Table 5: Results of Final Surveys in Building 2 Group 11..................... 15 Table 6: Exposure Rate Measurements - Group 11 Labs. .... 24 Table 7: Results of Removable Contamination Surveys....... . 25 Table 8: Comparison of the Site Decommissioning Plan (SDP) with Surveys Performed... 27 l l iii

4W Building 2 Group 11 I IRT OF FIGURFE (Unpaged) Figure 1: General Atomics Site Figure 2: Building 2 Laboratory Locations (Figures 2A,2B and 2C) Figure 3: Lab 216: Alpha Scan , Figure 4: Lab 216: Beta Scan Figure 5: Lab 216: Locations and Results of Fixed Beta Measurements on Floor Figure 6: Lab 216: Locations and Results of Fixed Beta Measurements at Paint Sample Locations Figure 7: Lab 216: Locations of Removable Contamination Survey Figure 8: Lab 216: Locations and results of Exposure Rate Measurements Figure 9: Lab 216: Overhead Light Fixture Survey Figure 10: Lab 238/240: Initial Alpha Floor Scan Figure 11: Lab 238/240: Locations of Beta Scan Measurements on Walls and Floor Figure 12: Lab 238/240: Location and Results of Final Fixed Beta Measurements after Decontamination Figure 13: Lab 238/240: Final Beta Floor Scan Survey After Decontamination Figure 14: Lab 238/240: Locations of Removable Contamination Floor Survey Figure 14A: Lab 238/240: Locations of Final Removable Contamination Floor Survey Figure 15: Lab 238/240: Locations of Removable Contamination Wall Survey Figure 16: Lab 238/240: Locations and Results of Fixed Beta Measurements at Paint Sample Locations Figure 17: Lab 238/240: Locations and Results of Exposure Rate Measurements Figure 17A: Lab 238/240: Locations and Results of Final Exposure Rate Measurements Figure 18: Lab 238/240: 100% Initial Beta Scan on Overhead Fixtures Figure 19: Lab 238/240: Final Beta Scan on Overhead Fixtures Figure 20: Lab 238/240: Locations ofInitial Removable Contamination Survey on the Overhead Fixtures Figure 21: Lab 238/240: Locations of Final Removable Contamination on the Overhead Fixtures Figure 22: Lab 238/240/242: Mezzanine: Initial Beta Scan, Floor and Walls Figure 22A: Lab 238/240/242: Mezzanine: Alpha Floor Scan Figure 23: Lab 238/240/242: Mezzanine Final Beta Wall Scan Figure 24: Lab 238/240/242: Mezzanine: Locations of Fixed Beta Measurements Figure 25: Lab 238/240/242: Mezzanine: Locations of Removable Contamination Floor Survey Figure 26: Lab 238/240/242: Mezzanine: Results of Fixed Beta Measurements at Paint Sample Locations Figure 27: Lab 238/240/242: Mezzanine: 1-Beam and Window Sill Beta Scan Figure 28: Lab 238/240/242: Mezzanine: Initial Beta Scan Results on Overhead Fixtures Figure 29: Lab 238/240/242: Mezzanine: Final Beta Scans on Overhead Fixtures Figure 30: Lab 238/240/242: Mezzanine: Locations ofinitial Removable Contamination Survey on Overhead Fixtures Figure 31: Lab 238/240/242: Mezzanine: Locations of Final Removable Contamination Survey Figure 32: Lab 238/240 Stairs: Beta Scan Results and Locations of Removable Contamination Survey iv

4W Building 2 Group 11 Figure 33: Lab 242: Alpha Floor Scan ~ Figure 34: Lab 242: Floor Beta Scans of Floor and Walls Figure 35: Lab 242: Fixed Beta Measurements Figure 36: Lab 242: Locations of Removable Contamination Survey Figure 37: Lab 242: Locations and Results of Fixed Beta Measurements at Paint Sample Locations on the walls. Figure 38: Lab 242: Locations and Results of Exposure Rate Measurements Figure 39: Lab 242: Beta Scan on Overhead Fixtures Figure 40: Lab 242: Locations of Removable Contamination Survey on the Overhead Fixture Figure 41: Lab 325: Alpha Floor Scan Figure 42: Lab 325: Beta Scans of Floor and Walls Figure 43: Lab 325: Locations and Results of Two Minute Fixed Beta Measurements Figure 44: Lab 325: Locations of Removable Contamination Survey on Floor and Walls Figure 45: Lab 325: Locations and Results of Fixed Beta Measurements at Paint Sample Locations Figure 46: Lab 325: Locations and results of Exposure Rate Measurements Figure 47: Lab 325: Beta Scan and Removable Contamination Survey on Overhead Fixtures Figure 48: Lab 325: Large Area Masslinn Wipe Trench Survey Figure 49: Lab 325: Scan open trench,100% Alpha. Locations and Results of Two minute Beta Fixed measurements Figure 50: Lab 325: Locations of Removable Contamination Survey . Figure 51: Lab 325: Beta and Exposure Rate Measurement Drain Survey Figure 52: Lab 443/445: Alpha Floor Scan Figure 53: Lab 443/455: Beta Scans of Floor and Walls Figure 54: Lab 443/445: Locations and Results of Two Minute Fixed Beta Measurements Figure 55: Lab 443/445: Alpha and Beta Drain Survey Figure 56: Lab 443/445: Locations of Removable Contamination Survey on Floor and Walls Survey Figure 57: Lab 443/445: Location and results of Fixed Beta Measurements on Paint Samples Figure 58: Lab 443/445: Locations and results of Exposure Rate Measurements ' Figure 59: Lab 443/445: Alpha Scan on Overhead Fixtures Figure 60: Lab 443/445: Beta Scans on the Overhead Fixtures and Ceiling Figure 61: Lab 443/445: Locations of Removable Contamination Survey on the Overhead Fixture Figure 62: ' Lab 443/445: Mezzanine: Alpha Floor Scan

Figure 63: Lab 443/445: Mezzanine: Beta Scan of Floor and Walls Figure 64: Lab 443/445: Locations and Results of Fixed Beta Measurements Figure 65: Lab 443/445: Mezzanine: Locations of Removable Contamination Survey on Floor and Walls Figure 66: Lab 443/445: Locations and Results of Fixed Beta Measurements at Paint Sample Locations Figure 67: Lab 443/445: Mezzanine: Overhead Beta Scan Figure 68: Lab 443/445: Overhead Fixtures Locations of Removable Contamination Survey Figure 69: Lab 443/445 Mezzanine: West Window Ledges

. Figure 70: Lab 615: Alpha Floor Scans y

y 4M Building 2 Group 91 Figure 71: Lab 615: Beta Scans of Floor and Walls - Figure 72: Lab 615: Beta Scan, Crack on Floor Figure 73: Lab 615: Fixed Beta Measurements Figure 74: Lab 615: Locations of Removable Contamination Survey Figure 75: Lab 615: Locations of Removable Contamination Wall Survey Figure 76: Lab 615: Locations and Results of Fixed Beta Measurements at Paint Sample Locations Figure 77: Lab 615: Locations and results of Exposure Rate Measurements Figure 78:. Lab 615: Beta Scan and Removable Contamination Survey on Overhead Fixtures Figure _79: Lab 623: Alpha Scan Figure 80: Lab 623: Beta Scan Figure 81: Lab 623: Locations and Results of Fixed Beta Measurements on Floor Figure 82: Lab 623: Locations of Removable Contamination Survey Figure 83: Lab 623: Locations and Results of Fixed Beta Measurements at Paint Sample Locations Figure 84: Lab 623: Locations and results of Exposure Rate Measurements Figure 85: Lab 623: Overhead Light Fixture Survey Figure 86: Supplemental surveys in Labs 238/240/242 and 443/445 1 / i ) 1 vi j j

$M Building 2 Group 11 INTRODUCTION i General Atomics (GA) is continuing its efforts directed at decontaminating, as appropriate, and obtaining the release to unrestricted use of selected laboratories and associated offices in GA's Building 2. The building was built in 1958 for purposes of conducting research and development activities. To date, ten (10) groups oflabs in this building have been decontaminated and released to unrestricted use. . GA has recently surveyed additional laboratories in Building 2 designated as " Group 11" This report summarizes the surveys completed for the " Group i 1" laboratories which consist of nine (9) labs having a total area of 3662 fF. The nine labs are labs 216,238,240,242,325,443,445,615, and 623. Labs 238/240 are combined labs as are labs 443/445. There is a mezzanine above labs 238/240/242 and one above labs 443/445. Labs 325 and 615 also have mezzanines but these mezzanines were released with the " Group 3" labs. Cs-137 was detected in labs 238/240 on the floor and 2 walls and or, the overhead structures (both the lower level and the mezzanine). Uranium contamination was detected on a small (<100 cm ) area of the floor and a small area (<100 cm ) on 2 2 . the wall in labs 443/445. No contamination was detected in any other " Group 11" lab. GA has no plans for conducting any future activities involving radioactive materials in these laboratories and/or mezzanines. (The offices across the hall from these laboratories have never been ) used for work involving radioactive materials). This report documents the results of extensive and comprehensive measurements completed in Building 2 " Group 11" Laboratories to demonstrate that these laboratories meet the approved criteria for release to unrestricted use. Accordingly, GA is j requesting that these laboratories and their associated offices be released to unrestricted use. SITE DESCRIPTION The location of Building 2 with respect to other facilities on the GA Site is shown in Figure 1. A layout of Building 2 and the location of each " Group i1" laboratory is shown in Figure 2. The nine labs are labs 216,238,240,242,325,443,445,615, and 623. Labs 238/240 and labs 443/445 are combined labs. There is a mezzanine above labs 238/240/242 and one above labs 443/445. Labs - 325 and 615 also have mezzanines but these mezzanines were released with the " Group 3" labs. The 2 total area to be released to unrestricted use is 3,662 f1 as follows: " Group 11" Labs I ab ft8 m l L 8 f 216 -336 -31 l l 238/240 -540 -50 l '}242 ~444 ~41 l } 238/240/242 mezzanine ~646 ! I J

4M Building 2 Group 11 t i l325 -276 -26 t l 443/445 -660 -61 l 443/445 mezzanine ~436 -41 l 615 -324 -30 623 -321 -30 j Totals 3.662 340 l CRITERIA FOR RELEASE TO UNRESTRICTED USE Table 1 is taen from U.S. NRC's criteria for releasing facilities and equipment to unrestricted use. It has been incorporated into GA's SNM-696 license. The State of California's guidelines, "DHS Criteria for Release of Facilities and Equipment to Unrestricted Use," also known as "DECON-1," are j summanzed in Table 2. These guidelines have been incorporated into GA's State of California License No. 0145-37. l PREVIOUS ACTIVITIES (HISTORY OF USE) AND CLASSIFICATION GA's Work Authorization logs were researched in order to review the previous activities conducted in l each lab and to identify the radionuclides of concern. Three of the six labs (labs 216,325 and 615) had no history of use involving radioactive materials. The following is a brief summary of the activities performed in each lab and the classification of each lab based on its history. Lab 216 - No history of use of radioactive materials; therefore this lab was classified as an " unaffected area." i Labs 238/240 and Mezzanine above Labs 238/240/242 - Beginning in early 1960's through the 1970's, these labs were used nuclear fuel chemistry and radiochemistry operations. Chemical analyses l was performed on various types of nuclear fuels including Peach Bottom fuel, PSC fuel, HTGR nuclear fuel. This fuel typically contained 93% enriched uranium and thorium. The labs were authorized to have enriched uranium, thorium, mixed fission products, and tritium. Based on this, the labs were classified as a " suspect affected areas." 1 1 Lab 242-Beginning in early 1960's and through the 1970's, this lab was used to analyze nuclear fuel l samples, fuel elements and fuel compacts. The lab was also used to determine fission products and induced activity concentrations in the conduct of other analyses of sleeves, spines, and reflectors of Peach Bottom nuclear fuel elements. Peach bottom fuel contained enriched uranium and thorium. Samples were counted in this lab (i.e., gamma spectroscopy and post irradiation analyses) and-prepared for offsite analyses. The lab was authorized to handle fuel samples containing enriched uranium, thorium, mixed fission products and mixed activation products. The lab was classified as a 2 r k_

ME Building 2 Group 11 "non-suspect affected area". Lab 325 - No history of use of radioactive materials. Therefore, this lab was classified as an " unaffected area." Labs 443/445 and the Memnine above 443/445-Beginning in early 1974 into 1986 this lab was used for storage of Special Nuclear Materials (SNM) and source materials, including enriched uranium, depleted uranium and thorium. Therefore, these labs and mezzanine were classified as "non-suspect affected areas." The labs were re-classified to " suspect affected area" after uranium contamination was detected. The mezzanine above labs 443/445 remained a "non-suspect affected area". Lab 615 - No history of use of radior.ctive materials: therefore, this lab was classified as an " unaffected area." Lab 623 Beginning in early 1988 and up until 1994 this lab was used for storage and use of Special Nuclear Materials and source materials, including enriched uranium, depleted uranium and thorium.. Therefore, these labs were classified as a "non-suspect affected area." INSTRUMENTATION Table 3 lists the instruments used during the radiological surveys. The table includes: (1) a description of the instrument, (2) the model and serial numbers of the meters and detectors, (3) instrument ranges, (4) calibration due dates, (5) typical efficiencies, and (6) typical background count rates. BACKGROUND MEASUREMENTS Six (6) types of surfaces exist in the " Group 1 I" labs. These surfaces are tile over concrete, concrete, concrete block, dry wall, metal, and wood. Building 13 was selected for conducting background measurements due to the age of the building, because radioactive material has never been used in this building, and the various surfaces found in Building 2, could also be found in Building 13. The fixed background measurements are shown in Table 4. The mean and standard deviation for 2 each surface surveyed with the 100 cm detector were calculated using equations 8-11 and 8-12 from NUREG/CR-5849 as shown below: Equation (8-11): c,n r Equation (8-12): 8,3 3

+W Building 2 Group 11 Background measurements and minimum detectable activities (MDA's) for each type of surface and for various counting times are also provided in Table 4. Minimum detectable activities (MDA's) for each type of surface, were calculated using equation (5-2) from NUREG/CR-5849 as shown below: Equation (5-2): 2.71 +4.65 /B,x t MDA= (dpml100cm,) ^ txEx 100 Where: Ba=backgroundrate (cpm) t = count time (min) E = cficiency 2 A = area ofthe detector (cm ) SURVEY PLAN Survey plans which documented the types of surveys to be performed and the locations were developed based upon the physical characteristics of the lab, the radioactive material used, the potential for contamination, and the results of the characterization surveys. The physical characteristics of the labs include the consideration of vents, ducts, whether surfaces are painted or unpainted, overhead structures, Door coverings, etc. Types of surveys performed include scanning, exposure rate measurements and survey measurements (wipes and Dxed measurements). In areas where elevated readings were detected, additional surveys were taken. The nrst surveys performed were surveys of the tile or Door covering. Only one contaminated tile was detected and that was in lab 238/240, all other Door coverings were at or near background levels. All the Door coverings and the mastic or glue were removed before the Gnal surveys were started. The contaminated tile in 238/240 was removed and managed as low level waste before the rest of the tile was removed. A comparison of the Gnal radiological survey requirements in the Site Decommissioning Plan (SDP) with the surveys performed for the " Group 11" labs is provided in Table 8. DECONTAMINATION Contamination in labs 238/240 was found during scanning using a 434 cm beta gas How 2 proportional detector. The maximum contamination level on the Hoor was 48,000 cpm, and the raaximum contamination level on the wall was 10,000 cpm. A Dxed reading was taken of the spot on the Door with the 100 cm beta detector and it measured 6630 dpm/100 cm. A sample of the 2 2 contaminated concrete was analyzed by gamma ray spectroscopy and the contaminant was identined as Cs-137. The Door required aggressive decontamination using a bead blast machine. As mentioned above, small areas of contamination were found on two walls and on the overhead 4 t

l 4W Building 2 Group 'i1 structures (i.e.,1-beams and lights). The contaminated wallboard was removed and disposed of as radioactive waste. The ceiling and fixtures were decontaminated with foaming cleanser and paper towels. Contamination was also detected on the overhead fixtures in the mezzanine above labs 238/240/242. These fixtures were decontaminated and subsequent surveys showed levels below the release criteria. Small areas of contamination (i.e., <100 cm2) were detected in labs 443/445. One area was on the floor and the other area was on the wall A paint sample was collected from the contaminated area on the wall and analyzed for gross alpha / beta activity. The results showed 51 dpm/100 cm alpha 2 activity and 757 dpm/100 cm beta activity. Fixed radiation measurements were taken oefore and 2 after removal of the paint sample. Measurements were 1203 dpm/100 cm before the paint sample 2 2 was removed and 1666 dpm/100 cm after the paint sample was removed. A small section of concrete block was then removed and disposed of as radioactive waste. Subsequent measurements on and around this area showed that the levels were <l89 dpm/100 cm?. The small area on the floor + was decontaminated to levels at or near background levels using a hammer and chisel. No decontamination was required in any other " Group 11" lab. RESULTS OF THE FINAL SURVEYS Comnarison of Site Degommissioning Reauirements with Survey Performed A comparison of the final radiological survey requirements in the Site Decommissioning Plan (SDP) with the surveys performed for the " Group 11" labs is provided in Table 8. The table shows that sufficient surveys were performed in each lab to demonstrate compliance with the release criteria. Scanning in each area where tile was present, the tile was scanned over 100% of the surface using a floor 2 monitor having a 434 cm gas-flow proportional detector. After determining that the tile was clean, the tile was removed for the final survey. Scanning of the floors, walls, and overhead fixtures was performed for alpha and/or beta radiations using a floor monitor with a 434 cm gas-flow proportional detector whenever possible. In areas 2 where the large area detectors could not be used, i.e., overhead structures and window sills, scanning was conducted using 15 cm GM pancake detectors and/or 50 cm alpha detectors. 2 2 In unaffected areas (labs 216,325 and 615),100% of the floors and lower walls (< 2m) were scanned for beta activity and 10% of the upper walls (> 2m) were scanned for beta activity. In addition,10% of the floors were scanned for alpha activity. All results (shown in table 5 and associated figures) were at or near background levels. 5 i

3

• bW Building 2 Group Si in non-suspect affected areas (lab 242, mezzanine above labs 443/445 and lab 623),100% of the floors and lower walls (< 2m) were scanned for beta activity and at least 10% of the Doors were scanned for alpha activity. All results (shown in table 5 and associated figures) were at or near background levels. Initial scans in labs 443/445 showed elevated levels (see table 4 and associated figures). After decontamination, scan results were at or near background levels (see table 5).

In suspect affected areas (labs 238/240, mezzanine above labs 238/240/242 and labs 443/445),100% of the floors and lower walls (< 2m) were scanned for beta activity. In addition,100% of the floors were scanned for alpha activity. In all suspect affected areas,10% of the upper walls were also scanned for beta activity. On walls where contamination was detected on a lower wall (below 2 m), the upper portion of this wall was considered suspect. A supplemental survey of 25% of each of these upper walls was performed and the results (along with the instrument data) are provided in Figure 85. Final surveys in each of these labs after decontamination all showed levels that were at or near background levels (see table 5). Fixed Measurements in most cases, fixed measurements were performed using a beta gas-flow proportional counter 2 having a 100 cm detector. The counting time for the beta fixed measurements was two (2) minutes. 2 In some cases, a 15 cm GM detector was used to obtain fixed measurements primarily on overhead { I-beams, lights, floor drains and other smaller surfaces. Alpha fixed measurements were obtained l 2 using the 50 cm alpha detector. The counting time for each alpha fixed measurements was one mirute. For all fixed measurements, an appropriate background was determined for each type of surface and subtracted from the survey readings. The readings were converted to dpm/100 cm using the 2 efficiency of the detector. The results of the fixed measurements are summarized in Table 5 and the locations are shown in the respective figure noted on Table 5. The location and results of the fixed measurements are also provided in the associated figures. A total of 240 fixed measurements were taken. The results show that all radiation levels were well below the release criteria, and in all cases were below 1000 2 2 dpm/100cm (the maximum activity detected after decontamination was 767 dpm/100 cm ) in labs 238/240 where Cs-137 was the contaminant (the release limit for Cs-137 is 5000 dpm/100 cm ), 2 Removable Contamination Surveys Removable contamination measurements (smears) were performed on all surfaces inch. ding the floors, walls, overhead structures, ducts, lights and support beams. Smear surveys consisted of using a Whatman Filter Paper (4.7 cm diameter) and wiping an area of-100 cm. The smears were 2 counted in GA's Health Physics Laboratory using a Canberra 2404 low level alpha / beta gas flow proportional counter. A total of 377 smears were taken. The approximate locations where smears were collected are 6

$M Building 2 Group 11 shown in the Figures. The results of all removable contamination surveys are provided in Table 7. Removable contamination levels were all below the release criteria (alpha results were all <20 dpm/100 cm and beta results were all <45 dpm/100 cm ), 2 2 Ernosure Rate Measurements Direct radiation exposure rate measurements using a microR meter were taken in every room at randomly chosen areas. A total of 95 measurements were taken. The radiation levels ranged from 9-17 pR/hr, which are at or near normal background radiation levels. l l INTERNAL CONFIRMATORY SURVEY After completing its' final surveys, GA conducted internal confirmatory surveys of the " Group 11" labs. Small areas of additional contamination were detected on the floor in labs 238/240 and the overhead structures in these labs and on the mezzanine above labs 238/240/242. These areas were cleaned to levels below the release criteria and additional surveys performed. These supplemental surveys were in addition to the surveys performed for the confirmatory survey. A summary of each of the confirmatory surveys performed and the results are provided in Appendix A. CONCLUSION The results of the final and confirmatory surveys provided in eis report, demonstrate that the labs, designated as " Group 11", meet the NRC-and State-approved guidelines for release to unrestricted use. e i l l 7 I

i +suas Building 2 Group 11 i i TABLES 4 8

+M Building 2 Group 11 1 l Table 1: USNRC'S ACCEPTABLE SURFACE CONTAMINATION LEVELS Average"^' Maximum * " Removable *^' (dpm/100cm') (dom /100cm88 (dpm/100cm') U-nat, 2 5U,23eU, & associated decay products 5,000 a 15,000 a 1,000 a Transuranics, 22sRa, 22 era, 2' Th, 22eTh, 23'Pa, 100 300 20 22'Ac, '25, i2eg 1 Th-nat, 232Th, "Sr, 223Ra, 224Ra, 232U, iaog, issi, ' 'l 1,000 3,000 200 Beta / gamma emitters (nuclides with decay modes other than alpha emission or 5,000 15,000 1,000 spontaneous fission) except "Sr and other noted above. a Where surface contamination by both alpha-and beta / gamma-emitting nuclides exists, the limits established for alpha-and beta / gamma-emitting nuclides should apply independently. b As used in this table dpm (disintegrations per minute) means the rate of emission by radioactive material as determined by correcting the counts per minute observed by an appropriate detector for background, efficiency, an geometric factors associated with the instrumentation. c Measurements of average contaminant should not be averaged over more than 1 square l meter. For objects of less surface area, the average should be derived for each such object. d The maximum contamination level applies to an area of not more than 100 cm 2 l e The amount of removable radioactive material per 100 cm of surface area should be 2 determined by wiping that area with dry filter or soft absorbent paper, applying moderate pressure, and assessing the amount of radioactive material on the wipe with an appropriate instrument of known efficiency. When removable contamination on objects of less surface area is determined, then pertinent levels should be reduced proportionally and the entire surface should be wiped. l f The average and maximum radiation levels associated with surface contamination resulting from beta-gamma emitters should not exceed 0.2 mrad /hr at 1 cm and 1.0 mrad /hr at 1 cm, respectively, measured through not more than 7 milligrams per square centimeter of total absorber. ' Guidelines For Decontamination of Facilities and Equipment Prior to Release for Unrestricted Use or Termination of Licenses For byproduct, Source, or Special Nuclear Material, USNRC, July 1982, incorporated into GA's SNM 696 license. i 9

I 4W Building 2 Group 11 Table 2: STATE OF CA ACCEPTABLE SURFACE CONTAMINATION LEVELS . Average **' ' Maximum"^' Removable **' 2 (dpm/100cm ) (dpm/100cm:3 2 (dom /100cm > U-nat, 2250,2"U, & associated decay 5,000 15,000 1,000 products Transuranics, 2"Ra, 22'Ra, 2Th, 22eTh, 100 300 20 astp,, 227Ac, as, tag s Th-nat, 222Th, "Sr, 22'Ra, 22'Ra, as:U, *l, '82, 1,000 3,000 200 1 131g Beta / gamma emitters (nuclides with decay modes other than alpha emission or 5,000 15,000 1,000 spontaneous fission) except "Sr and other noted above Where surface contamination by both alpha-and beta / gamma-emitting nuclides exists, the limits a established for alpha-and beta / gamma-emitting nuclides should apply independently, b As used in this table dpm (disintegrations per minute) means the rate of emission by radioactive material as determined by correcting the counts per minute observed by an appropriate detector for background, efficiency, an geometric factors associated with the instrumentation. c Measurements of average contaminant should not be averaged over more than 1 square meter For objects of less surface area, the average should be derived for each such object. d The maximum contamination level applies to an area of not more than 100 cm. 2 The amount of removable radioactive material per 100 cm of surface area should be determined by 2 e wiping that area with dry filter or soft absorbent paper, applying moderate pressure, and assessing the amount of radioactive material on the wipe with an appropriate instrument of known efficiency. When removable contamination on objects ofless surface area is determined, then pertinent levels should be reduced proportionally and the entire surface should be wiped. f The average and maximum radiation levels associated with surface contamination resulting from beta-gamma emitters should not exceed 0.2 mrad /hr at 1 cm and 1.0 mrad /hr at 1 cm, respectively, measured through not more than 7 milligrams per square centimeter of total absorber. Guidelines For Decontaminaten of Facilites and Equipment Prior to Release for Unrestricted Use or Termination of Licenses For byproduct. Source, or Special Nuclear Material, also known as "Decon-1" incorporated into GA's State of CA Radioactive Materials License. 10

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4SNES Building 2 Group 11 { l Table 4: Background Measurements (Obtained from F.uildinc 13) Ludlum Model 222I Rate Meter s/n 84459 With Model 43-37 Probe s/n 086213 Beta Floor Monitor Background Scan 2 Results:434cm Detector (Efliciency=21.27%) Background Material Beta / Gamma Scan Pange in epm Concrete 1858-2036 Sheetrock 770-937 Wood 1061-1262 Glass 787-917 Metal 816-1047 Cement Block i174-1409 \\ Ludlum Model 2221 Rate Meter s/n 84734 With Model 43 37 Probe s/n 086236 Alpha Floor Moniter Background Scan Results: 434 cm' Detector (Efficiency 21.65%) I Background Material Alpha Scan Range (cpm) Concrete 4-24 I Sheetrock 0-20 Ludlum Model 2221 Rate Meter s/n 86302 With Model 43-37 Probe s/n 086215 Alpha Floor Monitor Background Sean 2 Results: 434 cm Detector (Efliciency 21.70%) Background Material Alpha Scan Range (epm) Metal 853-1185 Ludlum Model 2221 Rate Meter s/n 86332 With Model 43-68 Probe s/n 142540 100 cm Beta Detector 2 (Efficiency =25.29%) Background Material Average of 10 MDA (dpm!!00 cm') Measurements 2 minutes each (cpm 120) Concrete 1059 i37 267 Drywall 581 *19 199 Concrete Blocks 919 154 249 3 Ludlum MnM ' 21 Rate Meter s/n 84423 With Model 43-68 Probe s/n i19444 100 cm Beta Detector (Efficiency 27.25%) 2 Background Material Average of 10 MDA (dpm/100cm ) Measurements 2 Minutes each (cpm

• 20)

Concrete 1011 *24 212 Drywall 542 *31 156 13

48315M Building 2 Group 11 Table 4: Background Measurements (Obtained from Building 13) l Metal 655 *35 171 Concrete Blocks 803 132 189 Ludlum Model 3 Rate Meter s/n 138880 With Model 44 9 Probe s/n 145963 2 15 cm Beta Detector (Efficiency =22.05%) l Background Material Beta / Gamma Range in epm Concrete 100-140 Concrete Block 80-140 Drywall 60-100 Metal 80-100 Glass 60-100 Ludlum Model 3 Rate Meter s/n 139168 With Model 44-9 Probe s/n 145981 3 15cm Beta Detector (Efliciency=21.05%) Background Material Beta / Gamma Range in epm Concrete 80-100 Concrete Block 60-100 Drywall 40-60 Metal 60-100 Glass 40-60 Ludlum Model 3 Rate Meter s/n 143349 With Model 44-9 Probe s/n 145967 2 15cm Beta Detector (EfTiciency=21.25%) Background Material Beta / Gamma Range in epm Concrete 80 120 Concrete Block 60-100 Drywall 40-100 Metal 80-120 i Glass 60_100 14

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N A E s Figure 3: Lab 216: Alpha Scan Wall ' *'20 cpm ' - Wall Watt <20'com fb*' <20' cpm l <20 cpro. ,,;i. ? f,. . Doori-e l Wall Notes: 1. Survey results are provided in Table 5. 2. -10% of the floor wa'; scanned for Alpha. Scan results in cross hatched area. 3. All concrete surface. m

m. N A E S Figure 4: Lab 216: Beta Scan 1400 to 1600 cpm above 2m .i Wall 1500 to 1600 cpm Well Wall 900 to 1200 com a ve2m FNr 900 to 1200 cpm 900 to 1 cpm 1700 to 2000 cpm 1 l 1000 ' X1(p3 QQ;' Wall 900 to 1100 cpm above 2m Notes: 1. Survey results are provided in Table S. 2. -100% of the Floor and Walls (2m up) were scanned for Beta. Scan results in cross hatched area. -10% of the walls (above 2m) were scanned for Beta. 3. All concrete, cement block, sheetrock, and drywall surfaces. i i.

1 N W, > 'E S Figure 5: Lab 216: Locations and Results of Fixed Beta Measurements on Floor l 1 Wall <212 <212 <212 <212 l <212 1 <212 Wall Wall j

1. 2I2

<212 Fbor <212 (212 (212 <212 <212 <212 <212

Rj.

Plk[n p, J .: yn-Q w. i q:f

{h';Gb

'l 4 wait i Notes: 1. Survey results are provided in Tables 5 2. The values are in dprn/100cm and indicate the approximate locations of measurements taken. 2 Two minute tcp2m) fixed Beta readings were taken. 3. All concrete surface. L

= 1 1 N A E s Figure 6: Lab 216: Locations and Results of Fixed Beta Measurements at Paint Sarnple Locations Wall 3 IIE

• 185 l

l Wall Wall M 2 *11f 4 Floor <156 <156 I l 1 i_ l ) Two moule Fmed Beta measurements.- N More Pact Removal m com/1W 1 11$$ I Pact sampe. \\/ Ahen Pamt Removal m dpm/1w <158 ) Wall Notes:. 1. Survey results are provided in Table 5. 2. The values are in dpm/100cm and the diamonds indicate the approximate locations of paint samples taken. 2 Two Minute fixed beta readings were taken before and after paint samples were removed. 3. All cement block and drywall surfaces.

1 N vrf >'*E s Figure 7: Lab 216: Locations of Removable Contamination Survey Wall ne O W* Walt Fbor i l l \\ i g y i l Wall I l l Notes' 1. Survey results are provided in Tables 7. 2. The Numbers circled are the approximate locations of wipes taken. 3. All concrete, cement block and drywall surfaces. J

1 ) N & E S Figure 8: Lab 216: Locations and results of Exposure Rate Measurements i Wall 4 13 12 Walt Wall l Floor 13 12 l 13 11 w E gs 5*dj$ Walt Notes: 1. The values are exposure rate measurements in pR/hr at the approximate locations indicated. Each measurement was taken -1m above ground surface. 1 - 2. All concrete surface. l

-1 N

• v

\\ ^E S Figure 9: Lab 216: Overhead Light Fixture Survey l l WeII I sis P e e e u $Q lPg? )ight t91t Fettre Artom Floor l = b p'. jj < 80 cpm - 7 I /

n. /

u%, (< o

j q

I ~ s. Well 1. Survey results are provided in Table 5 2. -25% of Overhead was scanned for Beta. Scan results in cross hatched area 3. The Numbers circled are the approximate locations of wipes taken. Wipe results are in Table 7. 4. All metal surface. f

r. I i N A W4 >E v S Figure 10: Labs 238/240: Initial Alpha Floor Scan j i i 1 2 3 4 5 6-7 8 9 10 11 l. A won B C. ~ 1 l i D l .t E I F' Roor G j <20 We" H wen A i l. l-t .J K' Door Door Wall L Notes-1. Survey results are provided in Table 5.

2.

-100% of the floor was scanned for Alpha with a 434cm2 Alpha detector. Scan results in cross hatched area are in com. 3. All concrete surface. i i

N W4 >E V S Figure 11: Labs 238/240: Locations of Beta Scan Measurements on Walls and Floor 1 2 3 4 5 6 7 8 9 10 11 Above 2m 1600 < A I Wall 1400 to 2100 2400-2800 '2600 74DF-- TJDo l l 300 5000' 3000 D 3000 2400 2400 > 2500 i i E R o j8200 2400 l2600 2300 l F Above 2m 1200 l2600[ J00 - 2400 2300 2300 Above 2m I'00' 3000 2300 2300 '2300 Wall Wall 48,000 '8800 2300 1 2300 i i J 2300 K Door 1100 to 1400 goof p Wall 80 4.__. L Above 2m 1300 Notes-1. Survey results are provided in Table S. 2. Values indicated are locations of measurements that were above the alert levels on the walls and floors. 3. -100% of the floor and walls (2m up) were scanned for Beta. Scan results in cross hatched area. The values (in cpm) indicate the approximate lotions of elevated readings. 4. -10% of the N & E upper walls (above 2m) were scanned for Beta. 5. All concrete, cement block and sheetrock surfaces. J

i l N i A W4h>E v s Figure 12: Labs 238/240: Location and Results of Final Fixed Beta Measurements after Decontamination 1 2 3 4 5 6 7 8 9 10 11. I A Well B C 425 <267 767 D (267 E 348 <1500 dpm/100cm2(15i a

m GM)

F g <2e7 <267 <2e7 ' Fbor G <2s7 Well H WeII <2e7 <2s7 <2e7 l <267 <267 J <267 <287 <2s7 f-K Door Door wou L ( c1500 dpm/100cm3 (15cm GM) 8 Notes: 1. Final survey results are provided in Tables 5. 2. The values are in opm/100cm and indicate the approximate locations of rneasurements taken 2 2 using a 100cm Beta detector except where noted. Two minute (cp2m) fixed Beta readings were taken. 3. All concrete surface. I...

7 l N O W4 >E v s Figure 13: Labs 238/240: Final Beta Floor Scan Survey After Decontamination 1 2 3 4 5 6 7 8 9 10 11 A Wall B C .r-D E F , Floor G was H 1800 to 2500 epm /434cm2 wall 2 , 80 cpm /15cm I J K Door Door Wall L i l Notes: 1. Final survey results are provided in Table 5. 2. -100% of the Floor was post scanned for Beta. Scan results in cross hatched area. -100% of the West and East walls (decontaminated areas only) was scanned for Beta. Scan results in cross hatched area. 3 A!! concrete, cement block and sheetrock surfaces.

N A W4h,>E S Figure 14: Labs 238/240: Locations of Removable Contamination Floor Survey 1 2 3 4 5 6 7 8 9 10 11 1 A Wall a C o e F (3]) @ @) (2 )] (2) @ Floor (25) G H @) @) i a K Door Door Wall \\ L Notes: 1. Survey results are provided in Tables 7. 2. The Numbers circled are the approximate locations of wipes taken. } 3. All concrete surface. I u. J

No W4h,>E 5 Figure 14A: Labs 238/240: Locations of Final Removable Contamination Floor Survey i i 1 -2 3 4 5 6 7 8 9 10 11 j i 3 A' Wall B ) C l O@ o E F ~ o Wall y Wall I a K Wall L I I .Notgg; i 1. Final survey results are provided in Tables 7. 2. The Numbers circled are the approximate locations of wipes taken. 3. All concrete surface. i a

N O l W4h>E Y S Figure 15: Labs 238/240: Locations of Removable Contamination Wall Survey 1 2 3 4 5 6 7 8 9 10 11 A Wall l C D F Fbor G H W*" l- 'h J %r Mr Wall L l Notes: 1. Survey results are provided in Tables 7. 2. The Numbers circled are the approximate locations of wipes taken. l 3. All cement block and drywall surfaces. L. m

r:- N A W4 >E Y Figure 16: Labs 238f240: Locations and Results of Fixed Beta Measurements at Paint Sample Locations 1 1 2 3 4 5 6 7 8 9 10 11 A Wall g <1!9 <189 C 9 E F 'M' <l82 A Floor 3 1 <156 G <18s H W*8 l I J K 4 M158 g g Wall L Pamt Sam @e'= Two moule Fmed Beta measurements: Delore Pard Removal m dom /100cm2 _ After Pant Removal m dpmf100cma Notes: 1. Survey results are provided in Table 5. 2 2. The values are in dpm/100cm and the diamonds indicate the approximate locations of paint samples taken. Two Minute fixed beta readings were taken before and after paint samples were removed. 3. All cement block and drywall surfaces. i k: .]

N h> E W4 v S Figure 17: Labs 238!240: Locations and Results of Exposure Rate Measurements 1 2 3 4 5 6 7 8 9 10 11 A won 8 j C 18 .,16 to D l l E-F 15 14 1s Fbor \\ G H i 14 14 12 j K Door Door Wall L Notes' - 1. The values are exposure rate rnessurements in pR/hr at the approximate locations iridicated. Each measurement was taken -1m above ground surface. 2. All concrete surface. j

N A E i. q l v i ) s i Figure 17A: Labs 238/240: Locations and Results of Final Exposure Rate Measurements ~1 2 3 4 5 6 7 8 9 10 11 1 A i won B { C d D 16 16 1 E i F' 3, 3, 'FMr i 16 j k won H wan i 1 j 14 14 14 K Door Door. wall L Notes: 1. The values are exposure rate rneasurernents in pR/hr at the approximate locations indicated. Each measurement was taken -1m above ground surface. 2. All concrete surface, l~ l 1. i

N A W4 >E Y S Figure 18: Labs 238/240: 100% initial Beta Scan on Overhead Fixtures 1 Wall i 1 100 to 200 cpm 100f s j 180 cpmhw .t3 .3 ss s 200 cptvi - Seem.x s.x s ..s i m .s 1 Wall 280.com h ~' ~ weir

80) cpm--+;<

/ /? l. 200 to 400 cpm ( 4 l ). 'e. e, " ' ' ***( I 1 1 l, 1... \\' Door Door Wall N9 lee 1. Survey results are provded in Table 5. 2. -100% of Overhead Fixtures was scanned for Beta using a 15cnf probe detector, Scan results in cross hatched area. 3. All metal surface.

W N W4 >E 1 s Figure 19: Labs 238/240: Final Beta Scan on Overhead Fixtures Watt 200 com 220 corn (3646 dpm/100cm2) \\ h .,,1 ._x' '.* Seem., s s.a s u m e si 200cp @ Wall 200 com ^ ~ ~ watt e ) A 200 com/ j ) s2. se. ,=, Door Door Wall l 1 i l i j-Notes' 1 1. Final survey results are provided in Table 5. 2. -100% of Overhead fixtures was scanned for Beta using a 15cm probe detector. 2 Scan results in cross hatched area. 3. All metal surface. l!' L-L

I N I W4 >E S Figure 20: Labs 238/240: Locations of Initial Removable Contamination Survey on the Overhead Fixtures I Wall I I I I 1. f5 am W 2 l 2 ) = '.E? >4 -%i y=' 8 "l g,y wan perling G E (10; J f,df) A (12) I j @1 l 1 -i 3 ~ .=. M M Wall I I Notes-1. The Numbers circled are the approximate locations of wipes taken. Wrpe results are provded in Table 7. Survey results are provided in Tables 5. 2. All metal surface. I

[ N A W4 >E v S {. Figure 21: Labs 238/240: Locations of Final Removable Contamination on the Overhead Fixtures [ h

8) aosm.

l' Sn M] m ( k7) L,g ( ('3 j@g@y{"f"i -s ri e a Door Door WeII Notes: 1. Final survey results are provided in Tables 7. 2. The Numbers circled are the approximate locations of wipes taken. 3. All metal surface.

rr N A E j e l v s l Figure 22: Labs 238/240/242 Mezzanine: Initial Beta Scan, Floor and Walls i l i \\ s s s l l%, ' Glass Window . Glass Window ' 900 cpm on glass =\\ ' 900 cpm on glass \\ s 1100 to 1500 cpm Adery M,e#1100 to 1500 cpm c 9, 38 ~e <1- - - - O 1300 to 1700 car 5,200 g O 1300 7 com 1000 to 1500 cpm Wiranne wa# Above 2m 1500 to 1700 cpm 1500 to 17M p i m = j ma*. m ,\\ \\ 4 .r j N { \\ \\ A rrahme We# / /,, ) 800 to 900 cpm on glass NMtE ~ 1. Survey results are provided in Table 5 2. -100% of the floor and walls (2rn up) were scanned for Beta. Scan results in cross hatched area. -10% of the North, South & West Upper Wans (above 2m) were scanned for Beta. l [ 3. Two spots on the East waH were surveyed with a 15cm GM detector. 2 4. All metal surface. r I

I N f W d v l Figure 22A Building 2: Lab 238/240 Mezzanine 't a S 100% 434cm Alpha Floor Scan l 07/29/99 e-Lower Wan Open aren Glass Winddw Glass Window o [ L Mezzarune Fbor Menanone Wan <20 Mezzanine war I' j ll l 1. Mm Mezzansne Wa/I Building 2 Lab 238/240 Menanine [$ "((*df-Model-2221 N/A N/A N/A {k 84734 N/A N/A N/A h_

l 01/26/00 N/A N/A N/A f

I((/ 21.43% N/A N/A N/A f $l)lkhhhNl l s N/A N/A N/A lPMM$j 093599 N/A N/A N/A fNhhf-I-fhkj 4 34c m' N/A N/A N/A l Comments: 100% 434cm2 s Scan on floor. I \\ Signatu re: n i un a. Date n7/79mo

N &hE W4 v ' Figure 23: Labs 238/240: Mezzanine Final Beta Wall Scan aan mm.w aan m.ew as. Mezfanme WeR A <60 cpm " (<1500 dpm/100cm ) 2 i I Mezzanme war Mezzonine wen l l l l Mezzamne Wan L-l- m.u a,a anu l mm.= m.e= me" l Notes: 1. Final sun,ey results are provided in Table 5. 2. Beta scan was taken on the East wall (decontaminated area's only) was scanned for Beta with a 15cm2 detector. Scan results in cross hatched area. 3. All concrete surface.

N A W4 >E v S Figure 24: Labs 238/240/242 Mezzanine: Locations of Fixed Beta Measurements Glass Hindow Glass Wmdow Mez.ranme nlen 'III <171 5171 <171 ,97, ~., <171 <171

• 171 Mettanme WaN Mezzanine Wan

,,7, <171 c171 <171 ,373 cjyj cj71 O O O Mezzensne Wall Notes: 1, Survey results are provided in Tables 5. 2. The values are in dom /100cm and indkate the approximate locatens of measurements taken. 2 Two minute (cp2m) ftxed Beta readings were taken. 3. All metal surface.

N A W4 ye* E 8 Figure 26: Labs 238/240/242 Mezzanine: Locations of Removable: Contamination Floor Survey GJ.ss Wndow Gkss Wmdow Q' h Met.ranme W.0 1e,@ g M n., [ O = = i = \\ Mezz.nme W.N Notes: 1. The Numbers circled are the approxrnate locations of wees taken. Wpe results are provufed in Table 7. 2. All metal and drywall surfaces.

N A h> E W4 V S Figure 26: Labs 238/240/242 Mezzanine: Locations and Results of Fixed Beta Measurements Paint Sample Locations c Giess u1ndow Glass VAndow 3 Mezranme war 03, Cornputer $10.9 5189 Mezzensne Wan Mezzanone WaN $18_.9 <189 own cuan Gmee Two reunute Faed Beta measurements = , O Ahor Part Removal m Opm/100cm2 Before Pont Removal in comr100cm2 pg Mezzanine Wa# Notes: 1. Survey results are provided in Table 5. 2. The values are in dpm/100cm2 and the diamonds indcate the approximate locations of paint samples taken. ' Two Minute ftxed beta readings were taken before and after paint samples were removed. 3. All cement block and drywall surfaces. i.

N &hE W4 v Figure 27: Labs 238/240/242 Mezzanine: 1-Beam and Window Sill Beta Scan

mcw//egymmww/syw ww(myommuy,vga, 6-Beams <60 cpm

\\ we-a " /.. +. '3, s 6 5

?.

/ 5 '.-j. Wndow S'as

f

<60 cc m 'b l

?

y 1 heettanone WaN Mezzanine WeM i 4

7 e

.6 US B 5 I i; Mezzanone WaN m s emu <60 cpm I-Beams (,' - ', 'l, l,' ,, ' l Notes: 1. Final survey results are provided in Table 5. 2. -100% of the I-Beams and Window Sills (North side wall) were scanned for Bets with a 15cm2 detector in cross hatched areas. 3. M metal surfaces. I f.'. l..

N A W4h>E vy S Figure 28: Labs 238/240/242 Mezzanine: Intial Beta Scan Results on Overhead Fixtures l Gless Window Glass Window 60 Meryanme H au ,60 ,7 p~ n--- n / .f / l f q c 7 .g! F \\h; % 30) J p

-p

-+- El / y' i go y o 60) l [ t l ' e-i .e Mezzanine WaN N= N=' ,e k,Au Mezzanine WaH ~ m m i. H0 f ll l i I 0 { h Mezzanine Floor 100 ?' 60 i I.. I m m Bundow gunds. N Mezzanine WaN Notes: 1. Survey results are provided in Table 5. 2. -100% of Overhead fixtures were scanned with a 15cm2 probe detector for Beta. Scan results in cross hatched area. The values are given in cpm. 3. All rnetal surface. .a

I i N A h> E W4 v Figure 29: Labs 238/240/242 Mezzanine: Final Beta Scans on Overhead Fixtures '-] . {' g g! '-Mezqenme ha .l ' q il l g h 'j 1 W j l k l .l. [$ ? I ,L c 5.c a=m' Mezzanone Wall =

• =m

=m =m Mezzanone Wan 1 10' ,/j 1 O O Mezzanine Fbor Mezzanone Wall A A A I I Notes: 1. Final survey results are provided in Table 5. 2. -100% of Overhead fixtures were scanned for Beta with a 15cm detector. r Scan results in cross hatched area. The values are given in cpm. 3. All metal surface. f'

N A W4@> E V S Figure 30: Labs 238/240/242 Mezzanine: Locations of Initial Removable Contamination Survey on Overhead Fixtures - Gl.ss Wondow Glass Wrndow Mez ~ ranine n,dl '-~ 7 i } 9 ~ (1 ) 1 is) +4 ({ 10) ~ ,Q. A =,,,7 =. 97 p=. M.zz =. M.zz MezzYane Floor b@)-- m M O O A Mezz.nme W.R Notes: 1. The Numbers circled are the approximate locatsns of wipes taken. Wipe results are provided in Table 7. 2. All concrete surface. L

N h> E W4 v Figure 31: Labs 238/240/242 Mezzanine: Locations of Final Removable Contamination Survey f p Mezranme H en (' l-a', g 'l Ll -l 3 l l l a L } 1 Mezzanme WaN

• =~

Mezzanme Wen e> e a R@ 6 Mezzanine Floor <18+ (0 ^ h rig g _{ie Mezzanme Wan A wD N9tes: 1. Final survey results are provided in Table 7. 2. The Numbers circled are the approximate locations of wipes taken. 3. All metal surface. (

W i. Figure 32: Lab 238/240 Stairs; Beta Scan Results and Locations of Removable Contamination Survey l l ~ l ) a s /& \\ 1 's ' /d5 /dh '\\ /d8 'r h15) 'k. /$., 'A /di ' AN he '4 m '\\ /d& '\\ f9> \\ - }j} Stairs to the Mezzanine Not to Scale I i Notes: 1, Survey results are provided in Tables 5. 2. -100% of the Stairs (steps) and Handrails were scanned for Beta with 15cm GM. 2 3. The Numbers circled are the approximate locations of wipes taken. Wipe results are provided in Table 7. 4. Painted over metal handrails and partial non-slip pads over painted metal steps.

l N A w*

• E y

S Figure 33: Lab 242: Alpha Floor Scan Wall l Floor ~' well wa <20 l Door Wall Notes: 1. Survey results are provded in Table 5. 2. -100% of the floor was scanned for Alpha with a 434cm Alpha detector. 2 Scan results in crop, hatched area are in cpm. 3. All concT.e surface.

N A E w S Figure 34 : Lab 242: Beta Scans of Floor and Walls 1600 to 1800 cpm above 2m Wan .1800 to 1800 cpm 1100 1 cpm 1100 to 1300 cptr 1600 to 2400 cpm 1600 to 1800 cper WaN Wall 900 to 1300 cpm Door Wall 1100 to 1300 cpm Notes:

1. -

Survey results are provded in Table 5. 2. -100% of the floor and walls ( 2m up) were scanned for Beta. Scan results in cross hatched area. -10% of the walls (above 2m) were scanned for Beta. 3. All concrete, cement block and sheetrock surfaces. f l L t

i N A w* h E v 8 Figure 36: Lab 242: Fixed Beta Measurements won <212 <212 <212 <212 I <212 <212 <212 <212 l i-Wall Well I (212 <212 <212 <212 l <212 (212 <212 <212 J Door Wall Nott3; 1. Survey results are provided in Tables 5. 2.. The values are in dpm/100cm2 and indicate the approximate locations of measutements taken. Two minute (cp2m) fixed Beta readings were taken. 3. All concrete surface. 1 i %I -

N W4 E e S Figure 34: Lab 242: Locations of Removable Contamination Survey t 8 e Wen Well g Door Well Notes: 1. Survey results are provided in Tables 7. 2. The Numbers circled are the approximate locations of wipes taken. 3. All cornent block and G.ywall surfaces.

N A. w*h,>E S l Figure 37: Lab 242: Locations and Results of Fixed Beta Measurements at Paint Sample Locations l l i' l l l WaN 2 <18g <189 l l r \\ i 3

• 188 f.1ES 1 M

<156 Wall WaN i t PargSampe= <156 h 0 WaN Two mnute Fmed Beta measurements i ' Bafore Pont Removalin dom /100cmr { ARor Pont Removal n dpmr100cm2 j Notes: 1. Survey results are provided in Table 5.

2. '

The values are in dpm/100cm2 and the diamonds indicate the approximate locations of paint samples taken. Two Minute fixed beta readings were taken before and after paint samples were removed. 3. All cement block and drywall surfaces e

N AhE W4 v S Figure 38: Lab 242: Locations and Results of Exposure Rate Measurements WeII 1 1 14 12 J l 14 13 Wau w,ii 14 14 15 14 Door W811 ' Notes: l l 1. The values are exposure rate rnessurements in pR/hr at the approximate locations indicated. Each measurement was taken ~1m above ground surface. 2. All concrete surface. i i I.

p- - N @> E W4 l v l S l l l Figure 39: Lab 242: Beta Scan on Overhead Fixtures Wall l l h d <80 l

1. 8#

<*v m..s, s.Bessiil~ C tXTC C Wall ( ) av v=. w l /; w C"" : 1 /,, .d <80 i r~ g 4 a=%.ly h, j 4--- <so I i Door Wall l I Notes: 1. Survey results are provided in Table 5. 2. -100% of the Overhead Fixtures were scanned for Beta using a 15crA GM. Scan results in cross hatched area are in cpm. 3. All concrete surface. i

(- N A W4h, E i 8 I ( Figure 40: Lab 242: Locations of Removable Contamination Survey on the Overhead Fixture l i l l l l Wall 1 l h h l Watt Q _. w,1; w c_,

==, I C": ('j ) ~ \\ s s-l J '!?c=n) L') 8 J <=. e Door Walt l Notes' 1 . Survey results are provided in Tables 7. 2. The Numbers circled are the approximate locatens of wipes taken. 3. All rnetal surface. L.

I i s W E N Figure 41: Lab 325: Alpha Floor Scan C' Wen s Drain 7. <20 Floor Wen wou s Asstat ren:n cover won i i; Notes. I 1. . Survey results are provided in Table 5. 1 1

2.

-100% of the floor was scanned for Alpha. Scan results in cross hatched area. 3. All metal and concrete surfaces.

S w E N Figure 42: Lab 325: Beta Scans of Floor and Walls ADove 2 meters 1300 to 1600 cpm amen m eem one 900 to 1800 cpm Wall . Drain. 7 Cower 1000 to 1200 cprr 1100 to 1200 cptr . Above 3 meters D Aoove 2 meters 1000 to 1300 cpm waff - w,ff 1000 to 1200 com 1200 to 2200 cpm. Metet Tench Cowr ~ Wall ? 900 to 1300 cpm -s s. Above 2 meters 1000 to 1300 com Notes: 1. Survey results are provided in Table 5. 2. -100% Beta scan on the Floor and Walls (up 2 meters) were scanned for Beta Scan results in cross hatched area. I 3. -10% above 2m on the walls were scanned for Beta. As noted, Scan 'enuits above 2m of walls. 4. All metal and concrete surface. I~ _j

P~ S W E N Figure 43: Lab 325: Locations and Results of Two Minute Fixed Beta Measurements amou o sem m f Wall <212 <212 <212 <212 Drain. 7, <212- <212 <212 <212 Fbot Wall <212 <212 <212 <212 Wall <212 <212 <212 <212 Mets l Trench l Cyt l Door- -Door 4,,, L_. l Notes: L 1. The values are in dpm/100cm2 and indcate the approximate locations of measurements taken. Two minute (cp2m) fixed Bett. readings were taken. Survey results are provided in Tables 5. 2. All metal and concrete surface. l l

s W E N Figure 44: Lab 325: Locations of Removable Contamination Survey on Floor and Walls w-S Wei, 1 g g Drain 7, Floor O WeH Well 0r cone Door-..- Door i l-Notes: I ~ 1. _ The Numcers circled are the approximate locatons of wipes taken. Wipe results are provided in Table 7. 2. All concrete, cement block and drywall surfaces. L1

S W E N { Figure 46: Lab 325: Locations and Results of Fixed Beta Measurements at Peint Sample Locations 1 newu m m one f Wall { Metal Drain TW Cover M c156 4 11SE Floor V *189 Well Wan Metal inmch Cont Door-- Door y Two mrude Faed Beta rnessurements: O h PM RmW m W100cm3 Before Purit Removal si dom /100cm2 Pant SamgW e + Notes: ic Survey results are provided in Table 5. 2. The values are in dpm/100cm and the diamonds indicate the approximate locations of paint samples taken. 2 Two Minute fixed beta readings were taken before and after paint samples were removed. 3. All cement block and drywall surfaces. t.

[3 i-5 W t-s E N l l l Figure 46: Lab 325: Locations and results of Exposure Rate Measurements l m=- y' Wen 12 12 wtw Drain 7 Cover Floor WeH WeH l WW 12 12 rmen cover 1

1. ~#

Wan L l 1 i I t Notes: 1. Survey results are provided in Table 6. - 3. The values are pR/hr and indicate the approximate location of Exposure Rate rneasurements taken -im above ground surface. 3. All concrete surface.

I s W E N I Figure 47: Lab 325 Beta Scan and Removable Contamination Survey on Overhead Fixtures I f = = = - e E Open Aten <60 l<80' [ Upper Plationn I<80 ' l _.Drmn (4T Seem v Floor () k j f Walt w E 1 I _=. l Beam \\ l8 Door-Door y,, I I Notes-1. Survey results are provded in Table 7. 2. -25% of Overhead was scanned for Beta using a 15cm2 GM. Scan results in cross hatched area are in cpm. 3. The Numbers circled are the approximate locations of wipes taken. 4. All concrete surface. l -~ W

5 s W I' ,W N L Figure 48: Lab 325: Large Area Masslinn Wipe Trench Survey

w.., -

i g wou t war j Drain rm cnor l I Floor j l. i '.v n . won e t w* 7 mash Cover W i wei Tnmch i weII ~ l l - l f. l l 4 Notes: 1 i 1. The numbered square shows the approximate locaten of large area masslinn wipe taken in the trench. 2. No activity above background was found. . 3. All concrete surface. 1

s W E N Figure 49: Lab 325: Scan open trench,100% Alpha. Locations and Results of Two minute Beta Fixed Measurements won dc meet Drain Tm Coter Floor won won fe_ ira Cener<tr2 ~.s y:;,"l* wtar Trench Cover

1. ~~#

won l ) Notes: 1 1. Survey results are provided in Tables 5. l 2. 100% of Open Trench area was scanned for Alpha. 3.' The values are in dpm/100cm2and indicate the approximate locations of measurements taken. ,Two minute (cp2m) fixed Beta readings were taken in the open trench. 4. All concrete surface.

s W '~ E N l Figure 60: Lab 325: Locations of Removable Contamination Survey I am.u m ww l C' won L l l 1 l Drain 7, f Ceter Fbor l won won Mw -(Dg Toad cear war Trench Com Door-- Door y Notes: 1. . The Numbers circled are the approximate locatens of wipes taken inside the trench. Wipe results are provided in Table 7, 2. All concrete surface. I 1 l i i J

rm S W E N Figure 61: Lab 325: Beta and Exposure Rate Measurement Drain Survey y' Wall i Locaton of wpe and crud sample taken. 71 Drain Trench cow i i l Fkor Wall way; wW Trench com Door-- Door g.,y l Notes: 1. Drain survey results are provided in Table 5. 2 2. The value is in dpm/100cm. A Two minute (cp2m) fixed Beta reading was taken. 3. One wipe and one crud sample was taken for isotopic analysis. Wipe and sample results are provided in Table 7, 4. One Exposure Rate Measurement (micro-R) was taken on the drain (contact). The result was 10pR/hr. S. All concrete surface. - L l

E N4 8 vW Figure 52: Labs 443/445: Alpha Floor Scan (- 1 2 3 4 5 6 7 8 9 10 11 12 A B '<20s C ~ -.s D E F <20 <20 <20 -- Roor-Wall g ~. H , ~ < l J <20 Door-- Door _ Door K N' = 1 meter Notes: 1. Survey results are provided in Table 5. 2. -100% of the floor and walls was scanned for Alpha. Scan results in cross hatched area are in cpm. 3. All concrete surface.

E A N4 >8 vW Figure 53: Labs 443/455: Beta Scans of Floor and Walls 1100 to 1500 cpm above 2m 1 2 3 4 5 6 7 8 9 10 11 12 A 1000 to 1500 cpm B C D l 1 3000 cpm with a 434cm probe detector. 3 E (6 cpm with a 15cm2 GM probe before concrete spot was removed. 2 <100 cpm /15cm afterconcrete spot was removed). / .F 1000 to 1200 corr o 1100 to 1300 cprr siOO to 1300 epm l l above 2m Walt Wall G 1700 to 2400 cpm I E l \\ l l l ,l J Door.. Door Door l 1000 to 1200 cpm L 'l I s \\ \\ N = 1 meter 1000 tb 1200 com 1000 to 1200 cpm above 2m on wall aMve 2m Notes' 1. Survey results are provided in Table 5. 2. -100% of the floor and walls (up 2 meters) were scanned for Beta. Scan results in cross hatched area. -10% of the North, South & West Upper Walls (above 2m) were scanned for Beta. 3. All concrete, cement block and sheetrock surfaces.

E A N4 PS vw Figure 54: Labs 443/445: Locations and Results of Two Minute Fixed Beta Measurements 1 2 3 4 5 6 7 8 9 10 11 12 A <18' <189 <189 cae* WaH B c189 "r189 c189 C <156 <212 <212 <189 D <156 <212 <212 E <212 <212 <212 <189 F <1se <212 <212 <189 Fbor Wall Wall G <156 <212 <212 <212 H <212 <212 <212 <189 l <156 <212 <212 <189 J '17' <156 <156 Door-Door , M_ w,, K miss ,35s <156 l % = 1 meter Notes-1. Survey results are provided in Tables 5. 2. The values are in dpm/100cm and indicate the approximate locations of measurements taken. 2 Two mhute (cp2m) fixed Beta readings were taken. 3. All concrete, cement block, sheatrock and St-';,u: faces. I L /

E a N4

• 8 vW Figure 66: Labs 443/445: Alpha and Beta Drain Survey

(- 1 2 3 4 5 6 7 8 9 10 11 12 A B C D h <171 (MDA) Beta h <171(MDA[Bela Drain <25(MDA) Alpha . Drain <25 (MDA) Alphe F ~ - - Fka G H I J Door-- Door _ Door / K M a 1 meter Notes: 1. Survey results are provided in Table 5. \\ 2. Shaded circles with an X are the approximate locations of the Surveyed Drains. A two minute Beta reading was taken at each drain. Values are in dpm/100cm2 A one minute Alpha readmg was taken from each drain. Values are in dpm/100cm2 No activity was detected. 3. Metal and concrete surface. f

E E A N

• W Figure 56: Labs 443/445: Locations of Removable Contamination Survey on Floor and Walls Survey 1

2 3< 4 5 6 7 8 9 10 11 12 -D ^ m' won B 87 c (37) @6) (22) h h D E. h g g F g g ~" @ a H h l ) (h h) h Door-. Door _ Door p -K % = 1 meter Notes: 1. Survey results are provkled in Tables 7. j 2. The Numbers circled are the approximate locations of wipes taken. 3. All concrete, cernent block and drywall surfaces.

l I E N4

• 8 T

i W Figure 67: Labs 443/445: Locations and Results of Fixed Beta Measurements at Paint Sample Locations Final measurements taken around ekvated area where pamt sample was removed Readwsgs were <189 dpm/100cr# (MDA). 1~ 2 3 4 5 6 -7 8 9 10 11 12 ) i ) A / !RM 2 m 1666* <139 Y B C D E a@ em e Floor-G H I J N 0' N 5 4 <156 V < 56 Door-.-Door .K % = 1 meter Two mnuis Fixed Beta measurements. Pemt Samphp e N Before Pamt Removal n dom /100cm2 g Ahor Pami Removal in dpnV100cm3 Notes: 1. Survey results are provided in Table 5. 2. The values are in dpm/100cm and the diamonds indicate the approximate locations of paint samples taken. 2 Two Minute fixed beta readings were taken before and after paint samples were removed. 3. All cement block and drywall surfaces. 4.

• The concrete surface under the paint measured 1666 dpm/100cm. The concrete was chiseied off 2

until direct measurements were <189 dpm/100ctn2,

E A N4

• 8 vW l

Figure 68: Labs 443/445: Locations and results of Exposure Rate Measurements 1 2 3 4 5 6-7 8 9 10 11 12 'A B C l D 12 12 12 l l E i i F 12 l Floor G H I 10: 10 12 J Door-- Door _ Door K M = 1 meter Notes: 1. The values are exposure rate measurements in pR/hr at the approximate locations indicated. Each measurement was taken -im above ground surface. 2. All concrete surface.

E A N4 >8 YW Figure 59: Labs 443/445 Alpha Scan on Overhead Fixtures 1 2 3 4 5 6 7 8 9 10 11 12 1 A Y B C Open Area D j__---._-..- _ ; ;_..~. Beam 7 .-q--- 73 m 1y E '1 ~ F <20 ' '20 E G l H <20 <20 m J Door Door _ Door B K _% e 1 meter i UpqteL 1. Survey results are provded in Table 5. 2. -100% of Overhead was scanned for Alpha (50cm detector). 2 Scan results in cross hatched area are in epm. 3. All metal surface. L

E A N4

• 8

,W Figure 60: Labs 443/445: Beta Scans on the Overhead Fixtures and Ceiling i 1 2 3 4 5 6 7 8 9 10 11 12 A B C Open Area c__.,., ._g~;_..g._...____7.,s._._7_..,._.,_., E !I F 4 d Wall G Wan soo to 1500 com H i 900 to 1500 com l l J ooor-ooor _ Door K i % e 1 meter Notes: 1. Survey results are provided in Table 5. 2. -50% of the overhead was scanned for Beta. Scan results in cross hatched area. 3. All concrete surface.

7: E A N4

• 8 VW Figure 61: Labs 443/445: Locations of Removable Contamination Survey on the Overhead Fixture 1

2 3 4' 5 6 7 8 9 10 11 12 A g' won C Open Am D r -- - i--(%.-- - - ; - ~ w .r-( 9 1 ..Ib-g ~ wA b (b () ( .F G H l (2) (7) w l i i l J l u, -

oea,

.o-, K %~ = 1 meter Notes: I .1. Survey results are provided in Tables 7. l 2. The Numbers circled are the approximate locations of wtpes taken. 3. All metal surface. t k.

E N4 >S vW Figure 62: Labs 443/445 Mezzanine: Alpha Floor Scan Mezzanone Glass <20 <20 Mezzanone Fbor Mezzanone Wall Mezzanine Wall <20 <20 Door to Mezzanine Wall stairway Notes: 1. Survey results are provided in Table 5 2. -10% of the floor was scanned for Alpha. Scan results in cross hatched area. 3. All metal surface. L I

i E N4 >S V W Figure 63: Labs 443/445 Mezzanine: Beta Scans of Floor and Walls l l I 800 com above 2m j Menanme Glass 800 to 900 cpm i l 1100 to 1300 cptr 1000 to 1100 cpm 800 to 1000 cpm Menanme pw 700 cpm i above 2m Mezzanme WaN Mezzanine Wall above 2m ' 1000 to 1200 cpm 800 to 1000 cpm Door to. Mezzanme war stway 700 cpm above 2m N991tE 1. Survey results are provided in Table 5. 2. -100% of the floor and walls (2m up) were scanned for Beta. Scan results in cross hatched area. -10% of the walls (above 2m) were scanned for Beta. 3. All concrete, cement block, sheetrock and glass surfaces.

E. A TW q Figure 64: Labs 443/445: Locations and Results of Fixed Beta Measurements ) i t!- i Mezzanme Glass i l-c171

• 171
• 171 "171 "171

<171 l <171 <171 ,979 { Mezzanine Floor Mezzanine Way Mezzanne WaN I c171 <171 <171 <171 cg71 c171 <171 Door to Mezzanme war stauway ' Notes: 1. Survey results are provided in Tables 5. 2. The values are in dpm/100cm2 and indicate the approximate locations of measurements taken. Two minute (cp2m) fixed Beta readings were taken. 3. All concrete surface.

E A N4 8 vW ' Figure 65: Labs 443/445 Mezzanine: Locations of Removable Contamination Survey on Floor and Walls - mzz.nm GI.ss l i l %.n-e- ~--~ w.- .zz w., Mezz.nm W.R l Notes: 1. The Numbers circled are the approxwnste locations of wipes taken. Wipo results are provided in Table 7. 2. All concrete, cornent block, shestrock and glass surfaces. l

i E a i N4 >S TW 9 Figure 66: Labs 443/445 Mezzanine: Locations and Results of Fixed Beta Measurements at Paint Sample Locations ! Mezzanine Glass $1E9 i c156 ) Mezzantne Fbor Mezzanine Well Mezzansne WeH $1EE 3- <189 2 IIEE 1 <156 <156 3 Doorlo <156 Mezzanine Wan stamey Two rmnute Faed Beta measurements. Pant Sampe = [ pefore Pamt Removal ti dom /100cm8 Aner Pant Removal m domf100cma Notes-1. Survey results are provided in Table 5. l 2. The values are in dpm/100cm and the diamonds indicate the approximate locations of paint samples taken. 2 Two Minute fixed beta readings were taken before and after paint samples were removed. 3. All cement block and drywall surfaces. l L

PI l' r i t i. E I A N4 S i y W Figure 67: Labs 443/445 Mezzenine: Overhead Beta Scan . Mezzanme Glass irJ _j \\^ / l I n J wnenme won .800 to 1000 com wuena won j; 1 oaare Mezzenme WeH stenway i i - Notes: 1. Survey results are provided in Table 5. 2. -25% of the overhead was scanned for Beta. Scan results in cross hatched area. t 3. All rnetal surface. l. I

p L I E a N4 >S Y w. 1 i i I Figure 68: Labs 443/445; Overhead Fixtures Locations of Removable Contamination Survey l l l Qm lih ({2) .. <isp Mezzanme Glass Y Y \\ !M i \\ e l ) i { x il 1 J f8k Mezzanme was H rsh .T Mezzanone was i j h h h i-Doorto l uezzane was army l l l l l l Notes: 1. Survey results are provided in Tables 7. I 2. The Numbers circled are the approximate locations of wipes taken, 3. All rnetal surface.

i \\ ii 11ll!IlI !i !ll G EAh(gVW 4 N m m pc 0 09 s = e n g m d m e L ro w 3 tc o e t d n e n w d W m q 3 m i 2 00 c t 8 4 s 3 e 4 W l ha e it w n = a i t n m e a w B z r e o 5 f M 5 V le d b e a n 4 T n .s a / n in c e 4 s c m w d a 3 e f 4 q e r r u 4 0 id e s v w 0 o e s 9 r s t b p w e r a e o c r d n L a i c n o s w 9 lt d u e n 6 = s h a g e t la n e a r fo r w g y t u e me g v r 5 l i u 2 l F S A m s m e p t c o 0 N 1 2 3 08 m m pc 0 08 I u M ll

S A E N Figure 70: Lab 615: Alpha Floor Scans Wall i<20.

)0'

. 3 ;. ,9 h),A ' <20 :, ,f.,,lo } pq :- , ;yp-If; b ^..,. ; Crack - /;;,. f:ff,l };;' Wall .r, Wall _ j :-

/

<20 I /- 1 -/; <20 lf. k J/: j s } 7 ./ 4 l Door Door Wall Notes: 1. Survey results are provided in Table 5. l 2. -10% of the floor was scanned for Alpha. Scan results in cross hatched area are in cpm. 3. All concrete surface. 4 1 I l

s W d 'E Figure 71: Lab 615: Beta Scans of Floor and Walls i { Above 2m 1700 to 1900 cpm j 1 i Wall 1 1600 to 1900 cpm { / r \\ N / x 'l ,/ \\ \\, '\\ / gg \\ / Wall l Wall Above 2m 8 1600 to 1800 cpm 1000 to 1100 cpm 1700 2 2000 cpm 1600 to 2000 cprr f 900 to 1300 cpm / \\ Door-Door Wall 1100 to 1400 cpm M* 1. Survey results are provided in Table 5. 2. -100% of the floor and walls (2m up) were scanned for Beta. Scan results in cross hatched area. -10% of the walls (above 2m) were scanned for Beta. 3. All concrete, cement block and sheetrock surfaces. l

i; .8 E N Figure 72: Lab 615: Beta Scan, Crack on Floor Wall i N ] \\ / <q [. g- / x <M ./ '{ i Crack s Wall N Wall / <so l l / / .l / < 8, 0' I / I i. i~ - Door Door-Wall 1 l 1 J N9!*1 1. Survey results are provided in Table 5, 2. -100% of crack in the floor was scanned for Beta with a 15cm GM. 2 2 Scan results in cross hatched area are in cpm.

3. -

' All concrete surface. I 1

i -; ;-. 8 E (. N Figure 73: Lab 615: Fixed Beta Measurements Well [ <212 <212 ' <212 <212 / / / \\ f '212 M ck 4212 <212 <212 \\ s! J . Wen / Wen / / / .<212 <212 <212 <212 j / / / / <212/ <212 <212 <212 / f oaor-- oaar Well Notes: 1 Survey results are provided in Tables 5. - 2. The values are dpm/100ctn2 and indcate the approximate locations of measurements taken. Two minute (cp2m) fixed Beta readings were taken. 3. All concrete surface. A

8 'E N t Figure 74: Lab 615: Locations of Removable Contamination Survey 1 1 J Wall \\ / h / @c @/ 'N x / ~@JRAfD Wall s / Wall '} l / / /. t -/. i '/ l l' { @/ i / Door-Door Wall i Notes: 1. Survey results are provided in Tables 7. 2. . The Numbers circled are the approximate locatens of wipes taken. 3. All concrete surface. 2-

S A E N Figure 75: Lab 615: Locations of Removable Contamination Wall Survey Wan l 's ,/ / N / / s b q ,/ h Crack l \\j c' Wall ,y Wall / h (h 7 ( l Door Door Wall 1. Survey results are provded in Tables 7. 2. The Numbers cirded are the approximate locations of wipes taken. 3. All concrete surface.

S W 4

• E N

Figure 76: Lab 615: Locations and Results of Fixed Beta Measurements at Paint Sample Locations Wall 3 M <189 \\ \\, f' \\, / 's / \\ / N. / ,/ ~ Crack '\\ /N / s, e Wall Wall \\ / N --- j <189\\ s No painted / surface / / / / / / Po:nt Sampe = < v Door-- Door Two nwnne Faed Data rnessurements 1 Wall pefyr Posit Rerm/st m donV100cm? ARer Past Removal m oprnr100cr# N91tt 1. Survey results are provided in Table 5. 2. The values are in dpm/100cm2and the diamonds indicate the approximate locations of paint samples taken. Two Minute fixed beta readings were taken before and after paint samples were removed. 3. All cement block and drywall surfaces. t 1

S W 4 >' E N Figure 77: Lab 615: Locations and results of Exposure Rate Measurements 7 Wall \\ \\ 17 15 / s / s'\\ / s / \\ / \\ Crack / 17 \\ b,/ 15 wa wan 17 14 14, 14 Door - Door Wall Notes: 1. The values are exposure rate measurements in pR/hr at the approximate locations indicated. Each measurement was taken -im above ground surface. 2. All concrete surface.

( S ( W ) E Figure 78: Lab 615: Beta Scan and Removable Contamination Survey on Overhead Fixtures { { Wall U._+. .. i'. l' m. ._.._._.i2i yy a

80 C

Wall Wall d) w .I E w <80 ~ s80

k. _s ss Door Door Wall I

L Notes-1. Survey results are provkied in Table S. 2. -25% of Overhead was scanned for Beta wdh a 15cm GM. 2 Scan results in cross hatched area are in cpm. t 3. The Numbers circled are the approximate locations of wipes taken. Results are provided in Table 7. 4. All metal surface. l

N v 5 Figure 79: Lab 623: Alpha Scan { ~ y s Fbot <20 cpm Wall Wall i -l l Wall Notes: 1. Survey resnNs are provided in Table 5. - 2. - -100% of the floor was scanned for Alpha with a 434cm Alpha detector. 2 f. Scan resuNs in cross hatched area are in epm. 3. All concrete surface.

N E 4 A w s Figure 80: Lab 623: Beta Scan 900 to 1200 com above 2m WMow WMow WMow 900 to 1W com Wall ' Door ' Door 1100 to 1200 cpm 1100 to 1200 cpm 1700 to 2000 com 1000 to 1200 corn Fl00f II I3f,CE* a ve 1100 to 1300 cpm Walt Wall I i

s.w.

900 to 1100 com ca r

. wood e door I Wall 1500 to 1700 com 1500 to 1700 cpm above 2m Notes: 1. Survey results are provn: led in Table 5. 2. -100% of the Floor and Walls (2m up) were scanned for Beta. Scan results in cross hatched area. -10% of the walls (above 2m) were scanned for Beta. 3 All concrete, cement block, plaster, and drywall surfaces. i

N A, S Figure 81: Lab 623: Locations and Results of Fixed Beta Measurements on Floor Mndow nfndow nfndow j Wall Door Door <220 420 368 295 295 338 Fbor Wall Wall 366 368 3M I 290 554 520 cY I I Wall Notes: 1. Survey results are provded in Tables 5. 2. The values are in dpm/100cm and indicate the approximate locations of measurements taken. 2 Two minute (cp2m) fixed Beta readings were taken. 3. All concrete surface.

N A, s Figure 82: Lab 623: Locations of Removable Contamination Survey n ufndow %1ndow ntndow m.m Wall Floor n (A) Wall Wall I ar_. I I Wall Notes' 1. Survey results are provided in Tables 7, 2. The Numbers circled are the approximate locations of wipes taken. 3. All concrete, cement block, drywall and plaster surfaces.

N v S W S Figure 83: Lab 623: Locations and Results of Fixed Beta Measurements at Paint Sample Locations we Wnddw Wndow Wndow pen Wall y <199 i i E ~J <199 Floor Wall Wall I cit.i. ""' 8'"'*' (f) h>SN I I,,,, Two trunute Fmed Beta rneasurements Nore Pad Rernoyalf_dM100cnf After Pad Removal si dpm/10M Notes: 1. Survey results are provided in Table 5. 2. The values are in dpm/100cm2and the diamonds indicate the approximate locations of paint samples taken. Two Minute fLxed beta readings were taken before and after paint samples were removed. 3. All cement block drywall and plaster surfaces. I

N 'w s Figure 84: Lab 623: Locations and results of Exposure Rate Measurements mesm ntndow windomv ntndow mesa W*# poor ; w 12 12 14 13 Fbor Wall 1s 14 Wall 15 15 ed e.ed. I I Wall Notes: 1. The values are exposure rate rneasurements in R/hr at the approximate locations indcated. Each measurement was taken -im above ground surface. 2. All concrete surface.

N E 4 'Ag s Figure 85: Lab 623: Overhead Light Fixture Survey h wndow m oow afndow

• ~

< 80 cpm Door Door l C7l 57 y, i I}) d i igit irgtt Fi(to1 %tuw Fk>or Wall e, Wall a < 80 cpm N s a caeYo e l I Wall 1. Survey results are provided in Table 5. 2. -25% of Overhead was scanned for Beta with a 15cm2 GM. Scan results in cross hatched area are in epm. 3. The Numbers circled are the approxirnate locations of wipes taken. Results provided in Table 7. 4. All metal surface. I l l \\ l

Figure 86: Supplem:ntal Surv:y in Labs 238/240/242 and 443/445 Labs 238G40 N abs 2MM42 Menanine N cc, ment seca W4 E 1000 - 1300 cpm WhE was Gass Gass I l wncew mndow \\ uerzam was \\$ / l ~ -a- \\ WaN way >4aN Wad I s b x I N ~ wa" L__ 1000 - 1100 cpm ~ waaanega cement ama l 700 - 900 cpm Ory wan Labs 443/445 Cement Beck Mew Data I 700 - 1000 cpm u.aw.ao. t oa.,. E u.a.: 2225 ~ N4

• S seso2 g

g ~ m. C.I Do. 01/2499 eme.mme r oseris l l emo. s.a. 43 w [ . 8 v p d f 1 I seu,m, s u n.n.cewn.o e.n amanais. l Wa" won Rom Muuty B.dqpard Scm Raadet Ludurn 2221 i surece eswcenne a:e amo.incan Canuni stock imig I D'Y M eB951 L_ l wan I o Notes 1. 25% of West & South Upper Walls (above 2m) in Labs 238/240 were scanned for Beta 2. 25% of East Upper Wall (above 2m)in Labs 238/240/242 Mezzanine was scanned for Beta. 3 25% of East Upper Wall (above 2m) in Labs 443/445 was scanned for Beta 4. All scans are in cross hatched areas

\\ APPENDIX A Results of Supplemental and Confirmatory Surveys Performed to Final Radiological Survey Report Performed at General Atomics' Selected Building 2 Laboratories for Release to Unrestricted Use " Group 11" l i

APPENDIX A: Results of Supplemental and Internal Confirmatory Surveys Performed in the " Group 11" Laboratories of Building 2 Summary After all Snal surveys were completed, spot check " con 0rmatory" surveys were conducted by two (2) Health Physics Technicians who were not responsible for conducting any of the Onal surveys. These conGrmatory surveys included scans and spot checks of the floors, walls and overhead structures (1-beams, lights and fire sprinkler systems) using a floor monitor, a Geiger counter and a hand-held alpha counter. In addition, smears were collected in random locations. During the conduct of these surveys, small areas of additional contamination were detected on the floor and overhead structures oflabs 238/240 and on the overhead structures of the mezzanine above labs 238/240/242. This appendix summarizes the levels detected before and after decontamination, the supplemental surveys conducted to ensure that all the contamination was found and remediated, and the results of the conGrmatory surveys performed in accordance with the written confirmatory survey plan. Additional Surveys The contaminant had been identified in earlier surveys as Cs-137. The release criteria is: 5,000 dpm/100 cm (averaged over a 1 m area) 2 2 15,000 dpm/100 cm (maximum in a 100 cm area if the average over 1 m is met) 2 2 2 1000 dpm/100 cm (removable activity) 2 The contamination on the floor oflabs 238/240 was detected (using a 15 cm geiger counter) along 2 the floor / wall seam in two locations, both of which had been previously decontaminated. In one location ~1000 cpm was detected along the seam (~ 28,400 dpm/100 cm ) and in the other location, 2 levels up to 500 cpm were detected (~14,200 dpm/100 cm ). These locations are shown in Figure 1. 2 Each location was decontaminated to levels of 100 cpm (< 1,500 dpm/100 cm ), 2 Contamination was also detected in the overhead structures oflabs 238/240 and the mezzanine above labs 238/240/242. The maximum contamination found was ~300 cpm (~6,400 dpm/100 cm ). The 2 areas were decontaminated to levels reading 100 cpm (< 1,500 dpm/100 cm ), 2 As a result, the following additional surveys were performed: 1. Additional scanning along the floor / wall seams (no contamination detected). 2. 100% scan of overhead area oflabs 238/240 for beta contamination and 10% scan of overhead area of labs 238/240 for alpha contamination (Figure 2). 3. 100% beta scan of the metal floor in the mezzanine above labs 238/240/242 (Figure 3). All results were at or near background levels). 4. 100% beta scan of the overhead structures above labs 238/240 (Figure 4). All readings were at or near background levels < 100 cpm (< 1,500 dpm/100 cm ), 2 I 1

5. 10% alpha scan of the overhead structures of the mezzanine above labs 238/240/242 (Figure 5). All readings were < 10 cpm (< 121 dpm/100 cm ) alpha using a 50 cm alpha detector. 2 2 6. A removable contamination survey for tritium was also performed on the floor, the mezzanine and the overhead structures. Tritium had been authorized to be used in these labs in the 1960's and 1970's. The location of the smears are shown in Figures 6,7,8 and 9. The results showed tritium levels to be < 105 dpm/100 cm (background not subtracted); well below the 2 release criteria. 7. A concrete sample was also collected in labs 443/445 (next to the spot on the floor which had been decontaminated). The contaminant in labs 443/445 had been identi6ed as enriched uranium. The U-235 concentration in the concrete sample was 0.35

• 0.17 pCi/g U-235.

The types ofinstruments used for this survey are provided in Table 2A along with the manufacturer, the calibration due date, the ef6ciency, the range and the typical background count rate. Internal Confirmatory Survey fiummary In addition to the " additional surveys" discussed above, the internal conGrmatory survey was performed in accordance with a written plan provided below. A total of 40 beta Oxed measurements,36 alpha Exed measurements,60 smears and 88 exposure rate measurements were taken. The results of these measurements are summarized in Table 1 A. The results confirm that radiation and contamination levels are well below the release criteria. Survey Plan Obiective To perform spot check " con 6rmatory" surveys in the 9 Group i l labs (labs 216,238/240,242,325, 443/445,615 and 623). Combined labs 238/240 are considered 2 labs as are labs 443/445. The surveys will be conducted by an HP Technician (s) who was not responsibb for ccaducting are of the Gnal surveys. These surveys will include scans and spot checks on the Doors and walls us'ng a floor monitor, a geiger counter and a hand-held alpha counter. In addition, smears will be collected in random locations. 13 eta Scans Scan ~10% of the floor surface using the 434 cm beta gas How proportional counter in labs 216, 2 238/240,242,325,615 and 623. Scan -25% of the floor surface using the 434 cm beta gas How proportional counter in labs 238/240 rad 2 labs 443/445. Scan only 10% of the floor surface in the 238/240 mezzanine and in the 443/445 mezzanine. 2

Perform spot check scans on the walls along the floor (the bottom portion of the walls) and scan along any cracks in the floor. Direct Measurements Using the 100 cm beta floor monitor and a hand held alpha counters (50 cm ), take 2 readings in each 2 2 lab with each instrument on the floor. All readings shall be I minute long. Removable Contamination Surveys Collect - 5 smears in each lab in random locations including the floors, ducts, light fixtures and I-beams and count on a low-level alpha / beta proportional counter. Exposure Rate Measurements Scan about 25% of the surface (~6" off the floor surface) in each lab. Take 2 measurements in each lab at I m and record readings. Alert Levels: 2 434 cm beta detector: > 300 cpm above background 2 100 cm beta detector: > 200 cpm above background 2 50 cm alpha detector: > 60 cpm above background 2 15 cm GM detector: > 100 cpm above background MicroR meter: > 25 pR/hr on surface and 20 R/hr at 1 m from surface i I 3

1 iil jil j l i!! re a ) 4 7 6 7 2 3 2 3 6 7 b, u e st 1 1 1 1 1 1 1 1 8 e a R 1 1 pR n 2 4 4 4 0 a p 1 1 1 7 4 4 x ( 1 1 1 1 1 1 1 1 1 1 E R e ts r f u e s o oa 8 8 8 8 8 8 8 8 8 8 8 t pRC 8 8 x E mpc te W 0 a 2 cRn t a ec p 6 9 a 1 t r s n 17 8 5 3 4 8 9 3 1 1 0 1 n u 1 1 1 1 9 1 1 os%i 4 6 5 6 4 0 0 2 7 5 4 e 9 Co5 g 1 1 1 m 1 1 1 1 s x a o 1 1 p2 n b E R fr a m e L p g c n ) 0 a 2 0 0 4 0 r m m 1 1 1 s 10 0 0 0 0 0 0 1 1 7 1 1 1 1 1 1 1 l c l t 1 ut 0 u p mu0 6 s s0 e u ix e1 m R or aR/ o 0 0 0 0 0 0 0 0 m 0 0 r 0 r 1 1 1 1 1 1 1 l G M pa 1 1 f o 1 d e t ( g ce 2 n t a e r d g s s n f a l M r t i oe 5 7 u 6 G 5 7 5 5 5 5 5 5 d 0 l

1. m s

6 e 2 i S u R m B c ro 5 y t 1 e c r e r h v r ls s s t r s s s s ol ol t ol oll r l rl r l r r l r s r ol i s s s s ol e t oa a d a w oa ol ol ol ol rl ol oll u oa o a oa ol ol oa oa l l S l p l w w f f w d f a a l w w w u f l l o l 0 M 0 e w l w w l l w f w 2 f m )m f f f f s 00 l 0 0 2 0 G 0 0 00 0 0 c 00 00 0 0 00 0 f e 00 00 y k 01 00 0 0 00 0 0 0 0 00 00 r Rcp 64 2 8 2 2 4 e 8 6 03 1 1 1 1 1 6 2 4 2 7 0 0 0 75 76 o n 4 (c 1 1 1 0 m 1 2 9 1 1 1 1 1 1 h 1 1 1 0 - t a3 1 0 - c a c4 00 0 0 c 0 0 e 00 00 0 0 00 0 - 0 - 00 00 S 00 6 0 5 6 0 r 0 0 00 0 0 00 0 0 0 0 00 001 4 m 4 0 3 1 1 e 4 2 8 8 9 0 2 0 10 0 6 0 1 1 1 l 1 I r 1 4 2 4 9 8 r 1 1 1 1 1 1 1 1 h e i t f i w n w o m d C e p 2 k c ) l a a m c 0 e 0 mt c ) ) h ) ) ) ) ) ) n lu0 2 8 u 0 A A c A A A A 1 1 1 1 1 1 A A r 1 1 1 2 2 2 2 2 4 0 2 2 9 D D e 1 D D D D 2 8 D D 3 e ms 1 M < M e < M v 1 r e 1 l 1 ie1 1 ( ( o < M 1 M t / xRm < M < M < M 3 8 n 1 r a p e ( ( ( ( b ( ( I M d w a f ( s o m a s p e t r l s c A u at 0 n ) s d e2 r 0 e e mmo 8 m. x e c c 2 2 p t 1 R i u0 e e 2 c 2 2 2 2 6 r f 6 2 2 2 1 t v 3 f sa5 e o 0 o A e( d b 0

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0 I 2 s e a 0 l e 0 b ) ) 2 e i 7 l) ) t a l) l) ) ) A a ml m e t 1 e e a t a t te t T uu0 r c s e t 1 c e e r r n a 9 C e 9 c 1 c ms0 0 o 3 e w 3 8 m 1 1 1 2 2 3

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n 5 n 4i 4i ls b 6 8 0 2 2 n 5 3 5 4 an 3 5 a a a 1 3 4 4 / 2 4 4 / 2 L 2 2 2 2 8 n 3 4 4 3 n 6 6 o 1 t 3 e 4 e T t 2 h 4 h i l lll!ll

{l1ll 1 ) l lllj l ll l ll ,1II l d ee v n 2 r 2. r 2. ii a a m o m o m tcb c c c c c t t amsd r e no 0 e e 0 n o t 0 r af 5 e 5 e 5 t ac u e r f d f d h et f al o o e o e o r t et o t af ol a h a h a iwr b e T e T e f t r e n e a r r r t s e e e ah g a g a t e n e n e nmmg b iy t b m a e o y i b e mle u r e o ot o t r ca sb r p v p v p r n af r r e u e u e y lad i t r n n ne o o v s v s v r e o oah pc i a t a t t t i i c c i e a m m c v it rT at a a t r o ,e n m2 n m2 n r ip ot . sd a t r pc r t a a a a e pe nt i /g m t /g m u c oe a c e h c h c h c eh s r t t a t 5 i a t S D we n oo b b dd nf w e1 w e1 w t 5 i ) l oh u ct g r g r g f ) f ) o Trkh A o o l o o a f ac f A f a A s ig ( a ( ( t a2. l iue e S d er S d er S n gmlo qh c n e a n e a n n Z s s a c r ,e a ue Z ue Z e s4 amh m o isb r sb r r t m n4 ot s o la t i o o 3 ne o o i t r t t r t s t r t yuf l np a np la ef d l e m o e sd e i e e e e i jr l t i l u atnwa p n mvi i uti n n mv t l t ut p t r uoom ic r c c r c i r e c t S t a S t s a ol u s a S p f s u in s h inn a nn a e m c-nm a a h a h b i e od i ai p e p e ta et s s h r nt p lA Th A Th lp h a S T pas mo h a l A e h d 4 n 4 m t la u) le le p c o m b b c r a 5 5 i r a 0 5 pgp T 0 T 0 0 o yk c f Tc( e e 1 0 a e e 0 B S S d 6 es 0 s s s s s 5 r U e0 e0 e0 e0 e0 a e) e s0 g0 g0 g0 g0 g0 g0 n e0 o 0, n 0, n 0, n 0, n 0, n 0, gm i a a a a a n L g 0, L 0 R0 R0 R0 R0 R0 s ap n 0 r a0 e 0 0 0 0 0 t R (c uR 0 n5 r5 r 5 r5 r 5 r5 n o 5 O0 o0 o0 o0 o0 o0 u u u u u e F 5 0 F F F F F m y u c r n e 0 8 5 8 8 t ic 7 1 f 1 15 2 5 2 5 s i 1 1 1 f 2 2 2 2 2 n E I f n o o e 0 0 9 0 0 9 i t t a 0 0 9 0 0 9 t aD 4 3 8 3 3 9 / / / / / / r s b e 2 1 0 1 1 2 i / / / / / / i l u 1 L aD 0 01 1 1 1 9 0 0 0 1 C

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5 9 7 6 1 o t 9 6 9 5 3 2 cN 1 e/ 2 6 9 6 8 5 t S 6 5 5 5 7 0 e 8 4 4 4 e 4 1 D 9 1 1 1 i l ba r 9 5 a a 5 a a T m 6 h 9 m 6 h u e mh m m m3 lp 2 a ml o mle7 mh 2 - p 5 a m42 m42 3 d e 2 lu4 m m m3l t e - c p lu4l cG ldl a u4A le c lud3 c p l d 6 a u4A t d o 4l d o3 lA ud5 / u d cG ldl 2 uM4 u 0 e m ud5 'a u 3 A LM4 e e m d d 5 L o1 a D L 4 L o c L o1 L o c t t M e B M0 M e 5 B M0 5 e a 2 2 9 N 1 t 1 23 / 8 1 20 2 r Rr2 0 m1 7 mS9 m1 8 m38 m1 5 e2 3 eN mt 6 lul 8 u3 4 4 0 u le1 e3 l - 3 lul 8 l d6 d d e d1 d lul 1 te/ ele 8 dd1 dl 3 d e3 e9 S dluMdN M d 4 u u o uo u o/ LM/N L o1 L oN LM/N u oN L M/ u MS S M S S MS / L lll'

N FIGURE 1 a, BUILDING 2 LAB 238/240 s 07/29/99 REMEDIATION OF ELEVATED AREAS 500 cpm Now 100 cpm 1 2 3 4 5 6 7 8 9 10 11 ~ I A I f B 1000 cpm C ~ Now 100 cpm - - - + - l G g H J l L I Background for the Model 3 used for the survey was 80 cpm. Building 2 Lab 238/240 lastrument(s) ' M odel-3 N/A N/A N/A l Serl.l Number f-f 143349 N/A N/A N/A l c.i.w.u.. .e - l >1,-~, N,A N,A N,A l' Efficiency :

f 21.25%

N/A N/A N/A l s '- 1p?.y i f p N/A N/A N/A l Probe Nember !l 145967 N/A N/A N/A l Probe Sise. ".~ l 15cm2 N/A N/A N/A l Comments: A11 readings recorded la counts per minute. e I _m Ps,....u u y~,.. p s._g_ g .,e.., _ u.te e,,,,,,

5 N "W Fl2URE 2 100% Direct Frisk Beta of Overhead Area s BUILDING 2 LAB 238/240 10% Direct Frisk Alpha of Overhead Area 07/29/99 wan I was wau 9 3 3 9M L \\ 'nwaw2enaswwwhVnaswww}wanA G w/// = - _ //////,;/1///1, 4 'E E g l E

• E E E' f

3 p \\ AS Door g Dwr = All areas direct frisked for Beta found to be < or = to Background listed below. i*d = All areas direct frisked for Alpha found to be none detectable. Building 2 Lab 238/240 Overhead Instrument (s) Model 3 M odel-12 N/A N/A l SerialNumberN l143349 138801 N/A N/A l Calibration Due' l ~ 1I/08/99 0I/13/00 N/A N/A lIEfficiency95 5 l 21.25% 21.58% N/A N/A h.es!$hfT[l p a N/A N/A l Probe N' mber 2 l u 145967 145696 N/A N/A p,g 3g.fi v C 15cm2 50cm2 N/A N/A Comments: Alf readings are recorded in counts per minute. Background for the M 3 was l 80 cpm to 100 cpm. The background for the M 12 was Ocpm a. l si,nat.,e. c <. M tt W na, e. o >,,-

N FIGURE 3

• v BUILDING 2: LAB 238/240/242 MEZZANINE

> *E s 07/29/99 2 434cm Beta Floor Scan Floor composed of Metal [ Lower Wan Open ares Glass Win @w Glass Winkw 650 cpm to 850 cpm Mezzanone Wall Mezzanine Wall I i L Mezzanine WaN Building 2 Lab 238/240 lutrummks)? ' Model-2221 N/A N/A N/A l Serial 2%nber -! 'l86.',02 N/A N/A N/A l Calibrati$$ Due ' Ol/24 A)0 N/A N/A N/A l Efficiemey 21.704 N/A N/A N/A ls -$1 - k.i p N/A N/A N/A 'I l Probe Nurhber : 08621$ N/A N/A N/A l Probe Size -7 434cm: N/A N/A N/A f Comments: 100% of the floor surface scanned for Beta. I pagnature:a s. 4I "m* 51 Datenw*mo

N FIGURE 4

• vg BUILDING 2: LAB 238/240/242 MEZZANINE y'e s

100% Beta direct frisk of Overhead 07/29/99 All areas were found to be less than or equal to Background listed below. Lower Wall Background for the Model-3's used for the survey was 80 cpm. j Glass Window Glass Hondow ]

?

2 Y 2^ a D n $ ~$ $ I $ j.s 4 Mezzanine Wall Mezzanine Wall i Mezzanone Floor ~ e rin..,,, Mezzanine Wall Building 2 Lab 238/240 Menanine Oserhead lastrument(s) = - Model.3 Model.3 N/A N/A l SerialNumber _ ) 61488 143349 N/A N/A l Calibration Due l01/13/00 11/08/99 N/A N/A l Efficiency : . l 21.35% 21.25 c4 N/A N/A 'a ; ' p J YJ/ p p N/A N/A l Probe Number :l f 117851 145967 N/A N/A l Probe Size El 15cm2 15cm 2 N/A N/A l Comments: All readings recorded in counts per minute. W l SignatureQ: CAW H l' ns F R a m ire r A (* S t, n le t Date: 07/'9/99

FIGURE 5 BUILDING 2: LAB 238/240/242 MEZZANINE ^E s 10% 50cm' Direct Alpha Overhead Frisk 07/29/99 Lower war e o Opes area e Glass Winabw Glass Window llh L l ~^' [ j. [ jp, g l M _ _. war M. _. war (. i Mezz$ 5 o ansne Floor nn s'"."n g Mezzanine Wan Building 2 Lab 238/240 Mezzanine ..t,.., instrasiM.,fdcfr Ludlum 12 Ludlum 12 N/A N/A e - lSe'rNNe[mk(( 138739 91051 N/A N/A CAkisralMNh I-13 00 9-29-99 N/A N/A Edkidlesyk 21.58 21.58 N/A N/A lk7Mkh($ a a N/A N/A fN hjil 145699 94053 N/A N/A fPMSYah[$h 50cm2 50cm2 N/A N/A f Comments: 10% 50 cm 2 a Direct frisk in overhead of Mezzanine. f All readings were < 10 cpm. = Area scanned. Signature D O~*H-Date n?imoo \\

N FCURE 6 BUILDINS 2: LAB 238/240 e s Smear Survey for Tritium Analysis 07/29/99 h = Denotes smear location Smears taken on floor for . Tritium Analysis 1 2 3 4 5 1 6 7 8 9 10 11 4 I i i Wall A. .l._.__,._...,...I..._._j. B ! I C l o O' O ....._..._.1,.~.. r..-._. Wall I } l Wall E I I ..-.i. ] . L.. F

g g

g y o H i a K f + L I Buddmg 21.ab 238/240 Janumanent(s) ;

• j N/A N/A N/A N/A l SerialNumbNi.l l N/A N/A N/A N/A lCaHbrasionDee l N/A N/A N/A N/A l. Efficaracy c.. *l N/A N/A N/A N/A I

l si 7, $ / ~ y ? l N/A N/A N/A N/A l Prche Nussber @'lN/A N/A N/A N/A l Probe 36ae's ?l N/A N/A N/A N/A l Comments: Triamm Smears taken in overhead. i l o,,, nwwo l i

FIGURE 7 BUILDING 2: LAB 238/240 M w Smear Survey for Tritium Analysis S @ = Denotes smear location Smears taken on floor for Tritium Analysis t{ik. Beam f>L r,r._ .=e . = - .=e k 5 2 m x h <=, a== < =, Door Door Building 2 Lab 238/240 Instrument (s) o N/A N/A N/A N/A l SerialNumber ?l N/A N/A N/A N/A l Calibration Due. l N/A N/A N/A N/A l - Efficiency *. )l N/A N/A N/A N/A [ l.. m el N/A N/A N/A N/A l Probe Number } l N/A N/A N/A N/A l Probe SizeEl N/A N/A N/A N/A l Comments: Tritium Smears taken in overhead. IDW oa,e n,,,,,,,

N FIGURE 8 W, BUILDING 2: LAB 238/240/242 MEZZANINE (

• E s

07/29/99 Floor composed of Metal / Lower Wa/I Smears taken on floor for Tritium Analysis @ = Denotes smear location oy,,,, Glass Wndow Glass Winkw Mezzanine Wall Mezzanine WaN 8 l Mezzanine Wall Building 2 Lab 238/240 Instrument (s) ' - N/A N/A N/A N/A l Seital' Number -l N/A N/A N/A N/A l Calbration Due / l i N/A N/A N/A N/A

l. EfficEncy h l

N/A N/A N/A N/A l a. I SL. J i.;' l N/A N/A N/A N/A l ' Probe Number '. lN/A N/A N/A N/A l Probe Size,. If N/A N/A N/A N/A l Comments: Tritium Smears taken on fhor. I Q t _ct._ l Signature: R I t a a' Date nmo mo

N FIGURE 9 BUILDING 2: LAB 238/240/242 MEZZANINE s 07/29/99 i I Lower Wa/I O - cenotes location of Tritium smear smears taken in overhead Glass %1ndow Glass Window S ,e 2 k k 2 5 a a . a5 a \\ Mezzanine Wa/I

• ='

"=m

• =m

==m ,4=s Mezzanone Wan L @~ 1 Mezzanine Floor ~~ Mezzanine Wall Buddmg 2 Lab 2.18/240 ~ instrument (s) V N/A N/A N/A N/A l SerialNemb4r':s lN/A N/A N/A N/A l Calibration Dee' l N/A N/A N/A N/A l ENiciencyi <l N/A N/A N/A N/A l' a E ' 'p V p-! l N/A N/A N/A N/A l Pwbe Number?l N/A N/A N/A N/A l' Probe Sisel:l N/A N/A N/A N/A l Comments: I IONiure: l Signa n s $^ac Date nim m _ - - - _ _}}