ML15188A186

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TSD-12-003, Rev. 0 - Determination of Radionuclide Activity Concentrations in Soil in Non-Impacted Soils Adjacent to the Zion Nuclear Station
ML15188A186
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Site: Zion  File:ZionSolutions icon.png
Issue date: 07/26/2012
From: Schut D
ZionSolutions
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Office of Nuclear Material Safety and Safeguards
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References
ZS-2015-0084 TSD 12-003, Rev 0
Download: ML15188A186 (27)
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TSD 12-003 Revision 0 DETERMINATION OF RADIONUCLIDE ACTIVITY CONCENTRATIONS IN SOILS IN NON-IMPACTED SOILS ADJACENT TO THE ZION NUCLEAR STATION July 2012 Prepared By; ----'-f2J~ . --<--L-----=~~

Doug Schult, CHP

_ _ Date; Radiological Engineer Reviewed By; ",-",-al-","",;£2~,--"B=>.-'~,..Qu-Q'~-A~==--____

_1(->-1 Bob Decker Date; l TP Radiological Engineering Manager ZionSolutions, llC Approved By; &t<{kf1 Steve Horvath '---

Date; Characterization/license Termin~anager ZionSolutions, llC

TSD 12-003 Revision 0 TABLE OF CONTE NETS 1.0 Introduction Page - 1 2.0 Survey Design Page - 3 3.0 Sample Analyses Page - S 4.0 Minimum Detectable Activities Page - 5 5.0 Survey Results Page - 5 5.1 Surface Soil Samples 5.2 Subsurface Soil Samples 5.3 Ludlum Model 44-10 Detector Measurement Results 6.0 Predicted Cs-137 Activity Concentration in Surface Soils Page - 8 List of Attachments;

  • Attachment 1 - Sampling Location GPS Coordinates
  • Attachment 2 - Ludlum Model 44-10 Detector 1 Minute Readings Collected at Various Heights
  • Attachment 3 - Surface Soil Sample Results
  • Attachment 4 - Subsurface Soil Sample Results

TSD 12-003 Revision 0

1.0 INTRODUCTION

In support of the decommissioning of the Zion Nuclear Station in Zion, Illinois a survey was performed to determine the radionuclide activity concentration of key radionuclides in non impacted soils adjacent to the Zion Nuclear Station. The area chosen for the survey was the Zion City Park District's Hosah Park, located north of the Zion Nuclear Station, at the end of Shiloh Blvd. The park consists of open land areas with a small shelter and several asphalt walking trails.

There is evidence of several old foundations present. The land area is covered with native grasses and low lying brush. For the most part the open land area appears not to have been disturbed for a number of years. Figure 1 shows the location of the area chosen for survey relative to the location of the Zion Nuclear Station.

In November of 2011 an open land area adjacent to the southern boundary of Hosah Park was surveyed to confirm that the soils in this area could be free released. An area measuring approximately 600 feet by 275 feet, covering an area of approximately 165,000 ft' (15,300 m')

was surveyed in accordance with Zion Nuclear Station's MARSAME Program. See MARSAME survey package UO-EXT-VCC-592-001. The intent of the survey was to allow soils that may be excavated during constructions activities associated with the Vertical Cask Construction (VCe) area to be moved and/or free released from the site without further radiological concerns. The survey consisted of gamma scans and systematic surface and subsurface soil sampling at 30 sampling locations. The gamma scans failed to identify any areas of elevated activity. The combined data sets, consisting of 60 soil sample analysis results had a mean Cs-137 activity concentration of 1.50E-2 pCi/g and a maximum Cs-137 activity concentration of 1.28E-1 pCi/g.

The mean Cs-137 activity concentration for the 30 surface soil samples was 1.14E-2 pCi/g. The sample analysis results were considered to be consistent with expected Cs-137 activity concentrations in disturbed soils due to global fallout and not due to licensed activities associated with the Zion Nuclear Station. This MARSAME survey provided assurance that the open land areas in Hosah Park were not impacted by licensed activities associated with the Zion Nuclear Station.

The survey in Hosah Park was designed to determine the radionuclide activity concentrations of key radionuclides, both naturally occurring and manmade, in surface and subsurface soil. Of particular interest is the activity concentration of Cs-137 in soil due to global fallout since Cs-137 is also one of the more predominant, and easily identified, radionuclides associated with licensed activities at the Zion Nuclear Station. The results of this survey will be used in the future evaluation of soils associated with the Zion Nuclear Station to help ensure that soils impacted by site operations are identified.

Page 1 of 10

TSD 12-003 Revision 0 Figure 1 Survey Area Relative to Zion Nuclear Station

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Page 2 of 10

TSD 12-003 Revision 0 2.0 Survey Design The survey design included surface and subsurface soil samples as well as static gamma measurements using a Ludlum 44-10 sodium iodide detector at several distances above the surface of the ground. The survey was designed to;

  • Determine the mean activity concentration and related statistical parameters of key radionuclides in surface soils (0 -15 cm) that have not been impacted by Zion Nuclear Station operations.
  • Determine the mean activity concentration and related statistical parameters of key radionuclides in subsurface soils (30 - 60 cm) that have not been impacted by Zion Nuclear Station operations.
  • Determine the mean response and related statistical parameters of a Ludlum Model 44-10 detector at various distances above soils that have not been impacted by site operations.

Prior to the survey, thirty (30) soil sampling locations were identified in Hosah Park. The sampling locations were chosen in areas that appeared to be undisturbed with minimal vegetation. Each sampling location was flagged and labeled with a sequential number beginning with 001. A GPS device was used to record the GPS coordinates of each of the sampling locations. Attachment 1 contains a listing of the GPS coordinates for each of the sampling locations.

Prior to sampling, all vegetation was cleared from an area of approximately 2 ft' surrounding each sample location. Once the vegetation was cleared, a one minute count using a Ludlum Model 44-10 detector was collected in contact with the ground and at a height of 15 cm above the ground's surface at each ofthe sampling locations. Attachment 2 contains a listing of the measurement results collected at each of the sampling locations.

At each sampling location a surface (0 -15 cm) and a subsurface (30 - 60 cm) soil sample was collected. As they were collected each soil sample was screened in the field to remove debris, vegetation, and rocks greater than 1 cm in diameter. Each sample was then placed in a pre labeled sample container and chain of custody paperwork initiated in anticipation of sending the samples to an offsite laboratory for analysis. The surface and subsurface samples collected from two of the sampling locations (01, and 16) were split and submitted to the offsite laboratory as separate samples. A total of 64 samples were submitted to the offsite laboratory for analysis.

Page 3 of 10

TSD 12-003 Revision 0 Sample containers were pre labeled with a 17 digit alpha numeric sample number. The following example is the sample number for a surface soil sample collected at sample location 001; L4BKG01BJGSSA001

  • The first digit "L" designates that the sample came from an open land area.
  • The second digit "4" designates that the sample ca me from a non-impacted area.
  • The third, fourth, and fifth digits indicates the survey area, "BKG" was chosen to designate a survey area for conducting a background study.
  • The sixth and seventh digit indicates the survey unit, "01" was chosen to represent Hosah Park.
  • The eighth digit "B' designates that the sample as a background sample.
  • The ninth digit designates whether the sample is a biased Uudgmental) sample "J" or if the sample is a QC sample "Q".
  • The tenth digit "G" designates that the sample was from the ground.
  • The eleventh digit "5" designates that the sample is a soil sample.
  • The twelfth and thirteenth digits designate whether the sample is a surface "55" or a subsurface "BS" soil sample.
  • The fourteenth digit "A" allows for the survey unit to be subdivided if necessary
  • The fifteenth, sixteenth, and seventeenth digits "001" designate which sample location the sample was obtained from.

At the completion of sampling each sample location was backfilled. Once the GPS data for each of the sampling locations was validated, the flags marking the sample locations were removed.

Page 4 of 10

TSD 12-003 Revision 0 3.0 Sample Analyses Each soil sample was shipped to Teledyne Brown in Knoxville, Tennessee for analysis. Prior to analysis each soil sample was dried and homogenized. Each soil sample was analyzed for gamma emitting nuclides by gamma spectroscopy (Co-60 and Cs-137), Sr-gO, thorium isotopic (Th-228, Th-230, and Th-232), and uranium isotopic (U-234, U-235, and U-238).

Teledyne Brown performed a receipt inspection for each of the samples received and validated that;

  • The sample containers were received in good condition,
  • A chain of custody fonm was received with each sample,
  • All of the samples listed on the chain of custody were received,
  • Each sample container contained a label, and
  • The information on the labels matched the information on the chain of custody form.

Four batches of samples were sent to Teledyne Brown using four separate chain of custody forms. For each batch of samples received for analysis Teledyne Brown analyzed a method blank, a laboratory control sample, and performed a duplicate analysis on an arbitrary sample .

4.0 Minimum Detectable Activity The minimum detectable activity specified for the four required analyses; gamma spectroscopy (Co-60, Cs-137), Sr-gO, thorium isotopic (Th-228, Th-230, and Th-232), and uranium isotopic (U-234, U-235, and U-238) was less than 0.1 pCi/g. In all cases the offsite laboratory was able to achieve this MDA, except in those cases where the radionuclide specific activity concentration in the sample exceeded the MDA.

5.0 Survey Results The sample analysis results for select radionuclides are provided in Attachment 3 for the surface soil samples and in Attachment 4 for the subsurface soil samples. Analysis results associated with the gamma spectroscopy analyses for K-40, Co-60, and Cs-137 are included . While other radionuclides were identified by gamma spectroscopy, none of these other radionuclides could be attributed to licensed activities. The radionuciides identified by the gamma spectroscopy analyses not listed in Attachments 3 and Attachments 4 are primarily due to decay products associated with t he naturally occurring thorium and ura nium decay chains.

Page 5 of 10

TSD 12-003 Revision 0 5.1 Surface Soil Samples Table 5-1 provides a summary of the surface soil sample results; Table 5-1 Surface Soil Samples Mean Activity I Maximum Activity Standard Radionuclide Concentration  ! Concentration Deviation (pCi/g) I (pCi/g) (pCi/g)

K-40 I 8.95E+0 9.0lE-l 6.96E+O Co-60 -3.19E-2 2.87E-2 1.88E-l Sr-90 -6.03E-4 5.26E-2 2.4lE-2 Cs-137 2.11E-l 6.51E-l 1.48E-l Th-228 1.72E-l 4.30E-l 1.18E-l Th-230 3.45E-l 2.07E+0 3.55E-l Th-232 1.53E-l 5.11E-l 1.04E-l U-234 2.03E-l 1.74E+0 3.23E-l U-235 1.40E-2 I 1.37[-1 3.24E-2 U-238 2.11E-l 1.86E+O 3.24E-l With the exception of the naturally occurring radionuclides, the only other radionuclide identified in the surface soil samples was Cs-137. Although Cs-137 is a licensed radionuclide associated with operation/decommissioning of the Zion Nuclear Station it is assumed that the Cs-137 activity concentrations in surface soils summarized in Table 5-1 are due to radioactive fallout.

Page 6 of 10

TSD 12-003 Revision 0 5.2 Subsurface Soil Samples Table 5-2 provides a summary of the subsurface soil sample results; Table 5-2 Subsurface Soil Samples Mean Activity Maximum Activity Standard Radionuclide Concentration Concentration Deviation (pCi/g) (pCi/g) (pCi/g)

K-40 6.62E+{) 8.59E+{) 9.49E-l Co-6O 3.72E-4 3.79E-2 1.38E-2 Sr-90 4.40E-3 5.30E-2 2.16E-2 Cs-137 2.64E-2 2.41E-l 6.00E-2 Th-228 l.26E-l 4.50E-l 1.14E-l Th-230 3.28E-l 8.11E-l 2.09E-l Th-232 l.21E-l 4.05E-l 9.54E-2 U-234 l.25E-l 7.36E-l 1.57E-l U-235 1.05E-2 1.1OE-l 2.43E-2 U-238 1.31E-Ol 6.65E-l 1.47E-l As with the surface soil samples, the only other radionuclide, with the exception of the naturally occurring radionuclides, identified in the subsurface soil samples was Cs-137.

However, Cs-137 was only detected in 5 out of 30 subsurface soil samples as compared to 26 out of 30 of the surface soil samples. For the purpose of this report a radionuclide is considered detected when its radionuclide specific activity concentration exceeds both the MDA for the analysis and the 2 a error term associated with the analysis.

Page 7 of 10

TSD 12-003 Revision 0 5.3 Ludlum Model 44-10 Detector Measurement Result Table 5-3 provides a summary of the, 1 minute, Ludlum Model 44-10 detector measurements at various distances above the ground; Table 5-3 Ludlum 44-10 Detector Measurements Distance Mean Maximum Standard Above (cpm) (cpm) Deviation Ground (cpm)

(cm)

Contact 4,464 4,759 129 15 4,432 4,733 137 The Ludlum Model 44-10 detector measurement results summarized in Table 5-3 show no difference between the contact measurements and the measurements taken at a height of 15 cm. The results also show no indication of elevated activity at any of the measurement locations.

6.0 Predicted Cs-137 Activity Concentration in Surface Soils A review ofthe Cs-137 sample analysis results for surface and subsurface soil samples summarized in Tables S-l and 5-2 show a clear difference in the results. Clearly the sample results can be attributed to two distinct populations. It is postulated that some portions of the open land areas comprising Hosah Park that were sampled during this survey were in fact disturbed areas, allowing surface and subsurface soils to mix. In order to determine the mean activity concentration of Cs-137 in surface soil that have not been impacted by Zion Station operations the surface soil sample analysis results for Cs-137 provided in Attachment 3 have been further analyzed. Of the 32 sample analysis results seven have been eliminated since Cs-137 was not detected in these samples. The analysis results for the remaining 25 samples is provided in Table 6-1 Page 8 of 10

TSD 12-003 Revision 0 Table 6-1 Cs-137 Activity Concentrations in Surface Soil Sample Number Activity (pCi/g) 2 a error (pCi/g) MDA (pCi/g)

L4BKG01BJGSSSA02 1.37E-1 5.77E-2 5.29E-2 l4BKG01BJGSSSA03 8.32E-2 5.16E-2 5.94E-2 l4BKG01BJGSSSA04 1.23E-1 6.75E-2 5 .01E-2 l4BKG01BJGSSSA05 1.72E-1 5.37E-2 4.01E-2 l4BKG01BJGSSSA06 4.97E-1 8.54E-2 5.58E-2 L4BKG01BJGSSSA07 3.34E-1 9 .21E-2 5.27E-2 L4BKG01BJGSSSA09 2.66E-1 5.53E-2 4.46E-2 l4BKG01BJGSSSAlO 1.94E-1 5.57E-2 5.41[-2 l4BKG01BJGSSSA11 1.51E-1 4.74[-2 4.39E-2 L4BKG01BJGSSSA12 3.12E-1 6.09E-2 5.09E-2 l4BKG01BJGSSSA13 3.17E.-1 6.99E-2 4.46E-2 L4BKG01BJGSSSA15 2.80E-1 7.38E-2 5.17[-2 L4BKG01BJGSSSA16 2.18E-1 5.72[-2 5.00[-2 l4BKG01BJGSSSA17 2.52E-1 6.53E-2 6.11E-2 l4BKG01BJGSSSA19 8.06E-2 5.21E-2 4.87E-2 L4BKG01BJGSSSA20 4.02E-1 6.32[-2 4.71E-2 l4BKG01BJGSSSA21 6.51E-1 8.77[-2 5.85E-2 L4BKG01BJGSSSA22 2.53E-1 6.56E-2 5 .56[-2 l4BKG01BJGSSSA23 2.25E-1 7 .19E-2 5.97[-2 l4BKG01BJGSSSA25 2.89E-1 6.11[-2 4.76E-2 L4BKG01BJGSSSA26 2.01E-1 5.81E-2 4.79E-2 I

l4BKG01BJGSSSA27 2.27E-1 6.92[-2 4.40E-2 L4BKGOIBJGSSSA28 I 2.41E-1 6.45E-2 5.01[-2 l4BKG01BJGSSSA29 2.77E-1 7.17[-2 4.90E-2 l4BKG01BJGSSSA30 2.60E-1 6.15E-2 4.13E-2 Number 25 Mean 0.26 Maximum 0.65 Standard Deviation 0.13 UCLmean 0.31 Page 9 of 10

TSD 12-003 Revision 0 Based on the data presented in the Table 6-1 the Upper Confidence Level of the Mean of the Cs-137 activity concentrations in undisturbed surface soil in the vicinity of the Zion Nuclear Station is 3.1E-1 pCi/g. Individual activity concentrations as high as 7.4E-1 (6.51E-1 + 8.77-E-2) pCi/g for Cs-137 in undisturbed surface soil would not be unexpected. These results compare favorable to data contained in an August 2005 Human Health Fact Sheet published by Argonne National Laboratory which stated that "The concentration of cesium-137 is surface soil from fallout ranges from about 0.1 to 1 picocurie (pCi)/g, averaging less than 0.4 pCi/g."

Page 10 oflO

TSD 12-003 Revision 0 Attachment 1 Sampling Location GPS Coordinates Sample Location Number Northing Easting 001 642344.05 343772.12 002 642348.84 343768.87 03 642359.14 343773.78 004 642358.54 343779.18 005 642363 .36 343784.70 006 642366.39 343779.80 007 642371.09 343773.91 008 642376.90 343777.31 009 642378.36 343783.08 010 642378.71 343787.07 011 642378.01 343792.20 012 642358.54 343788.74 I 013 642387.43 343785.62 014 642389.91 343781.38 015 642394.14 343782.44 016 642392 .77 343785.67 017 642392.28 343791.59 018 642394.10 343795.93 019 642395.13 343792.08 020 642395.81 343787.90 I 021 642396.25 343783.63 022 642397.71 343782.46 023 642400.89 343783.64 024 642398.81 343791.63 025 642397 .81 343793.86 026 642395.33 343804.09 027 642399.48 343803.90 028 642400.86 343796.20 029 642401.14 343794.38 030 642405.53 343797.33 Page 1 of 1

TSD 12-003 Revision 0 Attachment 2 Ludlum Model 44-10 Detector 1 Minute Readings Collected at Various Heights Sample Location Number Contact Reading (counts) 15 cm Reading (counts) 001 4318 4279 002 4272 . 4334 003 4540 4402 004 4530 4395 005 4373 4372 006 4384 4403 007 4531 4391 008 4426 4502 009 4759 4733 OlD 4656 4471 011 4573 4719 012 4502 4422 013 4603 4615 014 4453 4390 015 4466 4458 016 4591 4527 I 017 4605 4627 018 4473 4487 019 4451 4326 020 4447 4353 021 4598 4596 022 4353 4407 023 4263 4274 024 4297 4330 025 4507 4386 026 4258 4105 027 4294 4236 028 4587 4516 029 4487 4392 030 4337 4500 Page 1 of 1

TSD 12-003 Revision 0 Attachment 3 Surface Soil Sample Results

SAMPLE ANALYSIS RESULTS FOR SELECT RADIONUCLIDES - SURFACE SOILS Sample Number K-40 Sr-90 Co-60 C5-137 Activity 2 a Error MDA Activity 2 a Error MDA Activity 2 a Error MDA. Activity 2 a Error MDA pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g L4BKG01BJGSSSA01 6.01E+00 7 .26E-Q1 2.77E-01 1.18E-Q2 2.65E-Q2 5.09E-Q2 -1.16E-02 2.20E-02 3.34E-02 -2 .61E-03 2.42E-02 3.97E-02 L4BKG01QJGSSSA01 5.85E+00 1.22E+00 4.25E-01 7.43E-Q3 3.04E-02 5.94E-Q2 1.69E-03 3.44E-02 5.59E-02 3.42E-02 6.20E-02 L4BKG01BJGSSSA02 6.06E+00 1.14E+00 5.50E-01 -7.41E-03 2.69E-02 5.46E-02 -1.66E-03 3.06E-02 4.62E-02 1.37E-01 5.77E-02 5.29E-02 L4BKG01BJGSSSA03 7.20E+00 1.09E+00 4.43E-01 8.74E-03 2.79E-02 5.41E-02 2.87E-02 3.95E-02 7.34E-02 8 .32E-02 5.16E-02 5 .94E-02 L4BKG01BJGSSSA04 5.65E+OO 1.05E+00 5 .48E-01 -3.55E-Q2 2.66E-02 5.75E-02 -2 .71E-02 4.ooE-02 6.02E-Q2 1.23E-Q1 6.75E-02 5 .01E-Q2 L4BKG01BJGSSSA05 7 .97E+00 9 .41E-01 4.37E-01 -7.32E-03 3.30E-Q2 6.67E-02 -4.08E-Q3 2.78E-Q2 4.51E-Q2 1.72E-01 5.37E-02 4.01E-02 L4BKG01BJGSSSA06 6.03E+OO 1.30E+OO 4.04E-Q1 1.05E-Q2 2.87E-Q2 5.56E-Q2 2.49E-03 4.12E-Q2 6.74E-Q2 4.97E-01 8.54E-02 5.58E-02 L4BKG01BJGSSSA07 6.55E+00 1.15E+00 5.80E-01 1.27E-03 2.41E-02 4.77E-02 -4.17E-03 3.96E-02 6.33E-02 3 .34E-01 9.21E-02 5.27E-02 L4BKG01BJGSSSA08 5.80E+00 1.05E+00 4.18E-01 -2.25E-Q2 2.64E-02 5.56E-02 5.72E-03 3.49E-02 5.86E-02 1.22E-02 4.24E-02 6.22E-02 L4BKG01BJGSSSA09 7.47E+00 1.09E+00 5.26E-01 1.42E-02 2.84E-02 5.44E-02 5.08E-03 2.48E-02 . 4.19E-02 2.66E-01 5.53E-02 4.46E-02 L4BKG01BJGSSSA10 8.59E+00 1.23E+00 5.ooE-01 -3.29E-02 2.38E-02 5.21E-02 1.41E-02 3.72E-02 6.38E-02 1.94E-01 5.57E-02 5.41E-02 L4BKG01BJGSSSA11 8.57E+OO 9.90E-Q1 3.45E-Q1 -1.65E-Q2 3.02E-Q2 6.23E-Q2 2.47E-Q2 3.28E-02 6.02E-02 1.51E-Q1 4.74E-Q2 4.39E-02 L4BKGOlBJGSSSA12 6.S5E+OO 9 .55E-Ol 5 .17E-Ql -3 .28E-Q2 2.83E-02 6.08E-02 -1.15E-Q2 3.27E-02 5.09E-Q2 3 .12E-Q1 6.09E-02 5.09E-Q2 L4BKG01BJGSSSA13 7 .98E+00 1.03E+00 3.31E-Ol -6.13E-03 3.30E-Q2 6.63E-02 -5.01E-Q3 3.28E-02 5.23E-Q2 3.17E-Ol 6.99E-02 4.46E-02 L4BKG01BJGSSSA14 6.21E+00 9.90E-01 4.18E-01 1.10E-02 3.21E-02 6.20E-02 -5.28E-03 3.36E-02 5.25E-02 1.05E-02 2.84E-02 4.42E-02 L4BKG01BJGSSSA15 6.89E+00 1.07E+00 4.71E-01 -1.21E-04 2.44E-02 4.85E-02 -1.09E-02 3.64E-02 5.55E-02 2.80E-01 7.38E-02 5.17E-02 L4BKG01BJGSSSA16 6.00E+00 9.82E-01 3.39E-01 2.02E-02 2.91E-02 4.57E-02 -1.06E+00 2.83E-02 4.18E-02 2.18E-01 5.72E-02 5 .00E-02 L4BKG01QJGSSSA16 8.55E+OO 9.11E-01 3 .08E-01 3.41E-02 4.78E-02 7 .49E-02 5.51E-03 2.92E-Q2 4.89E-02 7 .S7E-Q3 3.ooE-02 S.06E-Q2 L4BKG01QJGSSSA17 7.18E+00 9 .89E-Q1 3.79E-Ol -6.22E-03 2.05E-02 3.46E-02 2.24E-02 3.12E-Q2 5 .79E-Q2 2.52E-01 6.53E-02 6. 11E-02 L4BKG01QJGSSSA18 6.63E+00 1.39E+00 5.01E-01 2.96E-03 2.25E-Q2 3.67E-Q2 -2.97E-Q2 3.57E-Q2 4.58E-02 8 .86E-02 4.41E-02 9.22E-02 L4BKG01QJGSSSA19 7.70E+00 1.08E+00 4.03E-01 -4.79E-02 4.74E-02 8.14E-02 -1.22E-02 2.62E-02 3.90E-02 8.06E-02 5.21E-02 4.87E-02 L4BKG01QJGSSSA20 6.83E+00 9.35E-01 4.00E-01 1.45E-02 5.05E-02 9.82E-02 -1.10E-03 2.87E-02 4.77E-02 4.02E-01 6.32E-02 4.71E-02 L4BKG01QJGSSSA21 7.91E+00 1.03+00 3.92E-01 2.55E-02 6.10E-02 9.77E-02 2.87E-02 3.01E-02 5.64E-02 6.51E-01 8.77E-02 5.85E-02 Page 10f6 TSD 12-003 Revision 0

Sample Number K-40 Sr-90 Co-60 Cs-137 Activity 2 CJ Error MDA Activity 2 CJ Error MDA Activity 2 CJ Error MDA Activity 2 CJ Error MDA pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g L41lKG01BJGSSSA22 6.92E+00 1.05E+00 4 .22E-01 5.26E-02 5.78E-02 8.88E-02 7.70E-03 2.98E-02 5.12E-02 2.53E01 6.56E**02 5.56E-02 L4BKG01BJGSSSA23 6.20E+00 9.62E-01 5.43E-01 1.63E-02 1.96E-02 3.68E-02 3.54E-03 2.22E-02 4 .74E-02 2.25E-01 7.19E-02 5.97E-02 L4BKG01BJGSSSA24 7.89E+00 7.50E-01 2.23E-01 -3.71E-02 4. 64E-02 9.79E-02 -1.08E-05 2.14E-02 3.53E-02 -7 .93E-03 2.11E-02 3.35E-02 L4BKG01BJGSSSA25 7.64E+00 9.35E-01 3.71E-01 1.36E-02 4 .12E-02 8.01E-02 -1.47E-02 2.18E-02 2.91E-02 2.89E-01 6.11E-02 4.76E-02 L4BKGD1BJGSSSA26 6.68E+OO 1.03E+OO 4.D2E-01 -2.99E-02 4.31E-02 8.98E-02 2.ooE-02 3.08E-02 5.65E-02 2.01E-01 5.81E-02 4.79E-02 L4BKG01BJGSSSA27 7.31E+OO 9.28E-01 3.42E-01 -2.06E-02 4.61E-02 9.44E-02 7 .11E-03 2.69E-02 4.55E-02 2.27E-01 6.92E-02 4.40E-02 L4 BKG01BJGSSSA28 7.47E+OO 9.46E-01 4 .20E-01 4.79E-02 4.98E-02 9.29E-02 5.69E-03 3.04E-02 S.13E-02 2.41E-01 6.45E-02 5.01E-02 L4BKG01BJGSSSA29 7.05E+OO 9.61E-01 4 .66E-01 -1.15E-03 1.52E-02 3.05E-02 -9 .79E-03 2.18E-02 3.95E-02 2.77E-01 7.17E-02 4 .90E-02 L4BKG01BJGSSSA30 5.44E+OO 8.11E-01 4 .27E-01 -7.83E-03 2.49E-02 5.06E-02 4.48E-03 2.78E-02 5.54E-02 2.60E-01 6.15E-02 4.13E-02 6.96E+00 MEAN -6.03E-04 MEAN -3.19E-02 MEAN 2.11E-01 MEAN 8.59E+00 MAX 5.26E-02 MAX 2.87E-02 MAX 6.51E-01 MAX 9.01E-01 STDEV 2.41E-02 STDEV 1.88E-01 STDEV 1.48E-01 STDEV Page 2 of6 TSD 12-003 Revision 0

SAMPLE ANALYSIS RESULTS FOR THORIUM - SURFACE SOILS Sample Number Th-228 Th-230 Th-232 Activity 20 Error MDA Activity 20 Error MDA Activity 20 Error MDA pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g L4BKG01BJGSSSA01 1.90E-01 9.06E-02 9.97E-02 5.94E-01 1.38E-01 4.94E-02 2.08E-01 8.ooE-02 2.85E-02 L4BKG01QJGSSSAOl 1.91E-01 8.20E-02 6.62E-02 3.52E-01 1.04E-01 3.42E-02 2.18E-01 8.29E-02 4.42E-02 L4BKGOIBJGSSSA02 1.55E-01 8.39E-02 9.16E-02 5.78E-01 1.41E-01 6.05E-02 1.81E-01 7.72E-02 3.02E-02 L4BKG01BJGSSSA03 1.07E-01 7.58E-02 6.11E-02 3 .26E-01 1.25E-01 6.05E-02 8.81E-02 6.25E-02 1.62E-02 L4BKG01BJGSSSA04 1.46E-01 7.33E-02 4.93E-02 2.68E-01 9.85E-02 3.45E-02 1.57E-01 7.22E-02 1.99E-02 L4BKG01BJGSSSA05 1.36E-01 7.88E-02 7.16E-02 2.15E-01 9 .12E-02 3.17E-02 1.52E-Ol 7.50E-02 2.24E-02 L4BKG01BJGSSSA06 2.49E-01 1.03E-01 6.39E-02 3 .50E-01 1.20E-01 1.20E-02 1.87E-Ol 8 .54E-02 3.88E-02 L4BKG01BJGSSSA07 1.59E-02 6.64E-02 4.71E-02 4.75E-02 5.60E-02 5.71E-02 4.80E-02 4.86E-02 1.77E-02 L4BKGOIBJGSSSA08 3.88E-01 2.56E-01 3.07E-01 2.07E+00 5.07E-01 1.01E-01 5.11E-Ol 2.46E-01 1.43E-01 L4BKG01BJGSSSA09 4.94E-02 4.66E-02 3.61E-02 3.06E-01 1. 13 E-01 7.15E-02 1.10E-01 6.76E-02 4.38E-02 L4BKG01BJGSSSAlO 2.46E-01 1.37E-Ol 1.39E-01 2.95E-01 1.40E-Ol 1.08E-01 9.67E-02 8.06E-02 6.61E-02 L4BKG01BJGSSSA11 4 .30E-Ol 1.81E-01 9.99E-02 4 .55E-Ol 1.82E-01 6.99E-02 1.71E-Ol 1.06E-Ol 4.04E-02 L4BKG01BJGSSSA12 6.23E-03 4.61E-02 8.02E-02 3 .54E-01 1.84E-01 7.94E-02 2.18E-Ol 1.41E-Ol 5.62E-02 L4BKGOIBJGSSSAB 2.23E-01 1.24E-Ol 1.01E-01 3.59E-01 1.47E-01 1.89E-02 1.79E-Ol 1.04E-01 6.lOE-02 L4BKGOIBJGSSSA14 2.99E-Ol 1.62E-Ol 2.93E-02 S.23E-02 7.01E-02 5.41E-02 1.31E-01 1.07E-01 5.41E-02 L4BKG01BJGSSSA15 1.27E-01 7.35E-02 6 .68E-02 3.27E-01 1. 13E-01 3 .62E-02 1.27E-01 6.59E-02 2.09E-02 l4BKG01BJGSSSA16 3.19E-01 1.19E-01 1.43E-01 4.58E-01 1.18E-01 6.21E-02 2.18E-01 8.11E-02 4.59E-02 l4BKG01QJGSSSA16 2.53E-01 1.45E-01 1.64E-01 4.74E-01 1.70E-01 9.13E-02 2.76E-01 1.27E-01 5.27E-02 l4BKG01BJGSSSA17 1.97E-02 5.51E-02 9 .09E-02 1.07E-01 7.51E-02 3.40E-02 2.48E-02 3.51E-02 1.83E-02 L4BKG01BJGSSSA18 3.73E-01 1.74E-01 1.88E-01 4.14E-01 1.61E-01 9.31E-02 2.12E-Ol 1.13E-01 5.38E-02 L4BKG01BJGSSSA19 2.44E-01 1.05E-01 9.83E-02 6.09E-01 1.53E-01 7.08E-02 2.69E-Ol 9.88E-02 3.34E-02 l4BKGOIBJGSSSA20 5.11E-02 9.04E-02 8.48E-02 2.00E-02 6.48E-02 8.39E-02 9.17E-02 1.07E-Ol 4.51E-02 L4BKG01BJGSSSA21 1.06E-01 1.24E-01 5.22E-02 3.50E-02 7.03E-02 5.17E-02 O.OOE+OO O.OOE+OO 5.17E-02 Page 3 of6 TSD 12-003 Revision 0

Sample Number Th-228 Th-230 Th-232 Activity 20 Error MDA Activity 20 Error MDA Activity 20 Error MDA pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g L4BKG01BJGSSSA22 9.55E-02 1.28E-01 9.88E-02 O.OOE+OO O.OOE+OO 5.25E-02 O.OOE+OO O.OOE+OO 5.25E-02 L4BKG01BJGSSSA23 3.31E-01 1.92E-01 1.74E-01 3.42E-01 1.78E-01 7.68E-02 2.70E-01 1.55E-01 5.43E-02 L4BKG01BJGSSSA24 -7.29E-03 1.46E-02 5.76E-02 2.91E-01 1.63E-01 3.06E-02 O.OOE+OO O.OOE+OO 3.06E-02 L4BKG01BJGSSSA25 1.70E-01 1.03E-01 9.31E-02 1.38E-01 8.19E-02 4.61E-02 1.88E-01 9.51E-02 4.61E-02 L4BKG01BJGSSSA26 -1.37E-02 4.30E-02 9.68E-02 1.22E-01 7.17E-02 5.87E-02 -1.21E-02 1.21E-02 4.79E-02 L4BKG01BJGSSSA27 1.49E-01 7.67E-02 5.28E-02 2.72E-01 1.02E-01 3.70E-02 1.06E-01 6.06E-02 2.14E-02 L4BKG01BJGSSSA28 1.46E-01 7.89E-02 6.82E-02 2.20E-01 9.04E-02 3.02E-02 1.68E-01 7.74E-02 2.14E-02 L4BKG01BJGSSSA29 1.65E-01 8.63E-02 6.68E-02 2.89E-01 1.09E-01 1.26E-02 1.53E-01 7.85E-02 4.05E-02 L4BKG01BJGSSSA30 1.50E-01 8.67E-02 1.30E-01 3.ooE-01 8.35E-02 3.34E-02 1.59E-01 6.15E-02 3.34E-02 1.72E-01 MEAN 3.45E-01 MEAN 1.53E-01 MEAN 4.30E-01 MAX 2.07E+00 MAX 5.11E-01 MAX 1.18E-01 STDEV 3.55E-01 STDEV 1.04E-01 STDEV Page 4of6 TSD 12-003 Revision 0

SAMPLE ANALYSIS RESULTS FOR URANIUM - SURFACE SOILS Sample Number U-234 U-235 U-238 Activity 2 a Error MDA Activity 2 a Error MDA Activity 2 a Error MDA pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g L4BKG01BJGSSSA01 2.88E-01 l.72E-01 1.60E-01 -8.32E-03 1.67E-02 6.58E-02 2.77E-01 l.61E-01 1.19E-01 L4BKG01QJGSSSA01 6.49E-03 4.73E-02 8.25E-02 1.71E-02 5.56E-02 7.21E-02 6.37E-02 7.39E-02 3 .13E-02 L4BKG01BJGSSSA02 -1.55E-02 2.20E-02 8.67E-02 2.76E-02 5.52E-02 4.07E-02 1.41E-01 1.21E-01 8 .67E-02 L4BKG01BJGSSSA03 4.99E-02 7.81E-02 8.41E-02 O.OOE+OO 2.03E-02 3.95E-02 O.OOE+OO O.ooE+OO 3.19E-02 L4BKGOIBJGSSSA04 -1.07E-02 2.14E-02 8.44E-02 O.OOE+OO 2.95E-02 5.60E-02 6. 14E-02 8.71E-02 4.53E-02 L4BKGOIBJGSSSA05 2.97E-Ol 1.40E-01 6.44E-02 1.67E-02 3.36E-02 2.47E-02 2.34E-Ol 1.22E-01 5.26E-02 L4BKGOIBJGSSSA06 1.49E-01 1.36E-Ol 4.39E-02 O.ooE+OO O.ooE+oo 5.43E-02 1.49E-Ol 1.36E-Ol 4.39E-02 L4BKG01BJGSSSA07 7 .50E-02 7.61E-02 2.77E-02 4.64E-02 6.61E-02 3.42E-02 -1.95E-02 2.28E-02 8.92E-02 L4BKG01BJGSSSA08 1.74E+00 6.75E-01 4.22E-01 O.OOE+OO 2.78E-02 9.34E-02 1.86E+00 6.85E-01 3.15E-Ol L4BKGOIBJGSSSA09 4.37E-01 2.65E-01 2.62E-Ol -1.24E-02 2.48E-02 9.78E-02 3.45E-Ol 2.15E-01 1.37E-Ol L4BKGOIBJGSSSAI0 O.OOE+OO 2.42E-02 4.39E-02 O.OOE+OO 3.00E-02 5.43E-02 3.56E-Ol 2.21E-01 1.42E-01 L4BKGOIBJGSSSAll O.OOE+OO O.OOE+OO 4.35E-02 O.OOE+OO O.OOE+OO 5.38E-02 2.95E-02 5.92E-02 4.35E-02 L4BKGOIBJGSSSA12 9.16E-02 8.25E-02 2.70E-02 -1.57E-02 2.23E-02 8.80E-02 7.25E-02 8.52E-02 8.72E-02 L4BKGOIBJGSSSAB 2.69E-02 4.20E-02 4.53E-02 1.44E-02 2.88E-02 2.12E-02 3.45E-02 4 .88E-02 5.54E-02 L4BKGOIBJGSSSA14 O.ooE+OO 0.00E+00 5.19E-02 O.ooE+OO O.ooE+OO 6.42E-02 O.ooE+oo O.OOE+OO 5.19E-02 L4BKGOIBJGSSSA15 O.ooE+OO 1.53E-02 5.45E-02 1.37E-Ol 1.60E-ol 6.74E-02 O.ooE+oo 1.53E-02 5.45E-02 L4BKGOIBJGSSSA16 2.67E-ol 1.26E-ol 5.66E-02 6.ooE-02 6.07E-02 2.21E-02 2.18E-Ol 1.28E-01 1.13E-01 L4BKG01QJGSSSA16 1.75E-01 9.85E-02 7.83E-02 1.38E-02 2.76E-02 2.03E-02 2.42E-01 1.14E-Ol 7.83E-02 L4BKGOIBJGSSSA17 2.57E-01 1.59E-ol 1.80E-Ol O.ooE+oo 9 .72E-03 2.34E-02 2.57E-ol 1.42E-Ol 1.34E-ol L4BKGOIBJGSSSA18 2.13E-01 1.22E-Ol 1.37E-Ol 1.15E-02 3.97E-02 5.34E-02 2.04E-Ol 1.06E-Ol 9.65E-02 L4BKG01BJGSSSA19 2.99E-01 1.43E-01 1.44E-01 5.10E-02 6.25E-02 5.94E-02 3.51E-01 1.32E-01 8.32E-02 L4BKG01BJGSSSA20 2.51E-01 1.16E-01 1.76E-02 O.OOE+OO O.OOE+OO 6.88E-02 2.39E-Ol 1.13E-01 1.76E-02 L4BKG01BJGSSSA21 8.23E-03 4.19E-02 7.04E-02 O.OOE+OO 1.14E-02 2.36E-02 4.59E-02 5.33E-02 4.07E-02 Page 5 of6 TSD 12-003 Revision 0

Sample Number U-234 U-235 U-238 Activity 2 a Error MDA Activity 2 a Error MDA Activity 2 a Error MDA pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g L4BKG01BJGSSSA22 6.34E-Ol 2.73E-Ol 1.58E-Ol 9.34E-02 1.08E-Ol 4.59E-02 4.01E-Ol 2.39E-Ol 2.37E-Ol L4BKG01BJGSSSA23 2.67E-Ol 1.12E-Ol 7.03E-02 1.09E-03 2.94E-02 5.50E-02 1.66E-Ol 8.74E-02 5.45E-02 L4BKG01BJGSSSA24 1.48E-02 5.13E-02 6.90E-02 -1.83E-02 3.66E-02 8.53E-02 O.OOE+OO 9.25E-03 2.18E-02 L4BKG01BJGSSSA25 4.37E-Ol 1.65E-Ol 1.04E-Ol 1.59E-02 5.50E-02 7.40E-02 2.83E-Ol 1.42E-Ol 1.20E-Ol L4BKG01BJGSSSA26 1.53E-Ol 6.71E-02 1.96E-02 7.70E-03 1.55E-02 1.14E-02 1.53E-Ol 6.71E-02 1.96E-02 L4BKG01BJGSSSA27 1.41E-02 4.89E-02 6.57E-02 O.OOE+OO 1.13E-02 8.13E-02 7.05E-02 6.33E-02 2.08E-02 L4BKG01BJGSSSA28 2.24E-02 7.26E-02 9.41E-02 O.OOE+OO 2.72E-02 6.24E-02 1.71E-01 1.54E-01 5.05E-02 L4BKG01BJGSSSA29 1.85E-Ol 8.61E-02 5.80E-02 O.OOE+OO O.OOE+OO 1.39E-02 1.64E-Ol 7.64E-02 2.37E-02 L4BKG01BJGSSSA30 1.56E-Ol 8.21E-02 4.75E-02 -9.72E-03 1.38E-02 4.80E-02 1.77E-Ol 8.66E-02 3.88E-02 2.03E-Ol MEAN 1.40E-02 MEAN 2.l1E-Ol MEAN 1.74E+00 MAX 1.37E-Ol MAX 1.86E+00 MAX 3.23E-Ol STDEV 3.24E-02 STDEV 3.24E-01 STDEV Page 6of6 TSD 12-003 Revision 0

SAMPLE ANALYSIS RESULTS FOR SELECT RADIONUCLIDES - SUB SURFACE SOILS Sample Number K-40 Sr-90 Co-60 Cs-137 Activity 2 (} Error MDA Activity 2 (} Error MDA Activity 2 (} Error MDA Activity 2 (} Error MDA pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g L4BKG01BJGSBSA01 1

' 6.30E+00 9.26E-01 2.47E-01 4.99E-03 2.70E-02 5.30E-02 1.92E-02 2.88E-02 5.24E-02 1.98E-02 2.95E-02 5.29E-02 L4BKG01QJGSBSA01 6.80E+00 9.55E-01 3.86E-01 2.21E-02 3.41E-02 6.48E-02 -9.67E-03 2.79E-02 4.44E-02 2.19E-02 2.56E-02 4.66E-02 L4BKG01BJGSBSA02 6.82E+OO 8.35E-01 4.03E-01 1.67E-02 2.94E-02 5.61E-02 -1.34E-02 2.89E-02 4.43E-02 1.59E-02 2.87E-02 5.ooE-02 L4BKG01BJGSBSA03 6.41E+OO 9.13E-01 2.80E-01 -2.31E-02 2.59E-02 5.48E-02 -8.91E-03 2.99E-02 4.67E-02 -1.20E-02 2.88E-02 4.46E-02 L4BKG01BJGSBSA04 5.75E+OO 8.92E-01 4.21E-01 -1.35E-02 2.84E-02 5.83E-02 6.79E-03 2.48E-02 4.22E-02 1.94E-02 2.66E-02 4.84E-02 L4BKG01BJGSBSA05 5.79E+OO 1.05E+00 4.90E+00 -2.68E-02 2.78E-02 5.90E-02 -1.59E-02 3.19E-02 4.61E-02 -6.27E-03 3.07E-02 5.02E-02 L4BKG01BJGSBSA06 4.48E+00 8.07E-Ol 3.03E-01 2.50E-03 3.24E-02 6.42E-02 -1.26E-02 3.06E-02 4.81E-02 4.61E-03 3.ooE-02 5.09E-02 L4BKG01BJGSBSA07 5.56E+OO 8.92E-Ol 4.22E-01 -1.10E-03 2.46E-02 4.90E-02 -4.69E-03 2.77E-02 4.44E-02 5.09E-03 2.57E-02 4.33E-02 L4BKGOIBJGSBSA08 6.41E+00 1.20E+00 5.33E-01 9.76E-03 2.76E-02 5.35E-02 -1.08E-02 3.70E-02 5.87E-02 -6.13E-03 4.11E-02 6.52E-02 L4BKG01BJGSBSA09 6.09E+00 8.19E-Ol 2.65E-01 -5.47E-03 2.59E-02 5.23E-02 -9.42E-04 2.18E-02 3.61E-02 -3.70E-03 2.17E-02 3.52E-02 L4BKG01BJGSBSA10 5.17E+00 8.84E-Ol 3.16E-Ol -5.13E-03 3.37E-02 6.77E-02 3.22E-03 2.91E-02 4.83E-02 -2.22E-02 2.69E-02 3.91E-02 L4BKG01BJGSBSAll 8.04E+00 1.08E+00 3.45E-Ol -2.42E-04 2.77E-02 5.51E-02 1.25E-02 3.53E-02 6.09E-02 1.10E-02 3.14E-02 5.48E-02 L4BKG01BJGSBSA12 7.12E+OO 1.03E+00 1.46E-Ol 9.04E-03 3.02E-02 5.88E-02 9.58E-05 3.10E-02 5.21E-02 1.32E-02 3.07E-02 5.27E-02 L4BKG01BJGSBSA13 6.23E+OO 1.08E+00 4.57E-01 -2.03E-02 2.17E-02 4.63E-02 -2.54E-02 3.74E-02 5.57E-02 1.13E-02 3.51E-02 5.91E-02 l4BKG01BJGSBSA14 6.90E+OO 7.14E-01 1.45E-01 2.59E-04 2.54E-02 5.03E-02 1.18E-02 2.03E-02 3.64E-02 9.30E-03 2.26E-02 3.89E-02 l4BKG01BJGSBSA15 I 6.92E+OO 9.77E-01 3.60E-01 I -1.39E-03 2.36E-02 4.71E-02 I -3.15E-04 2.60E-02 4.20E-02 I -2.27E-03 2.50E-02 4.11E-02 l4BKG01BJGSBSA16 6.16E+00 8.69E-01 2.58E-01 -1.30E-02 4.77E-02 7.95E-02 1.70E-02 2.63E-02 4.87E-02 1.05E-01 4.10E-02 4.46E-02 l4BKG01QJGSBSA16 6.45E+OO 8.32E-01 3.85E-01 -4.08E-02 4.96E-02 8.45E-02 -3 .89E-03 2.29E-02 3.62E-02 -6 .13E-03 2.52E-02 3.98E-02 L4BKG01BJGSBSA17 7.13E+00 8.63E-01 2.80E-01 1.97E-02 2.26E-02 3.46E-02 3.98E-03 2.14E-02 3.71E-02 4.03E-02 3.86E-02 3.73E-02 L4BKG01BJGSBSA18 8.59E+00 8.72E-01 3.14E-01 4.96E-02 5.45E-02 8.42E-02 2.89E-03 1.82E-02 3.09E-02 -6.63E-03 2.07E-02 3.30E-02 L4BKG01BJGSBSA19 5.34E+00 9.04E-01 3.86E-01 5.30E-02 6.31E-02 9.76E-02 3.79E-02 2.97E-02 5.93E-02 5.66E-03 2.80E-02 4.77E-02 L4BKG01BJGSBSA20 6.75E+00 1.02E+00 2.03E-01 7.97E-03 5.47E-02 8.91E-02 -8.81E-03 3.20E-02 5.03E-02 -4.67E-03 3.38E-02 5.46E-02 L4BKG01BJGSBSA21 7.24E+00 9.34E-01 3.06E-01 -2.18E-02 5.30E-02 9.03E-02 -2.43E-02 2.59E-02 3.42E-02 1.26E-03 2.65E-02 4.31E-02 Page 1 of6 TSD 12-003 Revision 0

Sample Number K-40 Sr-90 Co-60 C5-137 Activity 20 Error MDA Activity 20 Error MDA Activity 20 Error MDA Activity 20 Error MDA pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g L4BKGOiBJGSBSA22 7.73E+00 1.00E+OO 2.92E-Oi -7.22E-04 1.84E-02 3.0SE-02 -7.79E-03 2.78E-02 4.34E-02 4.8iE-03 3.36E-02 S.S3E-02 L4BKGOiBJGSBSA23 S.44E+OO 1.11E+00 3.i9E-Oi 1.23E-02 1.32E-02 2.4SE-02 1.44E-02 2.5iE-02 S.OlE-02 2.i4E-Ol 6.89E-02 4.78E-02 L4BKGOiBJGSBSA24 8.28E+00 9.91E-Ol 2.69E-Ol 3.88E-02 2.S8E-02 4.59E-02 -S.58E-03 2.92E-02 4.71E-02 1.62E-02 2.S7E-02 S.OSE-02 L4BKGOiBJGSBSA2S 7.82E+OO 7.84E-Oi 2.86E-Oi -3.2SE-03 l.S0E-02 3.02E-02 -1.26E-02 2.00E-02 3.06E-02 1. i7E-03 2.2SE-02 3.67E-02 L4BKGOiBJGSBSA26 7.29E+00 7.71E-Oi 2.SiE-Oi 2.49E-03 l.S2E-02 2.99E-02 3.57E-03 2.03E-02 3.47E-02 -1.S4E-02 2.29E-02 3.S2E-02 L4BKGOiBJGSBSA27 S.96E+00 8.i4E-Oi 1.19E-Oi 1.04E-02 2.84E-02 S.SOE-02 1.97E-03 2.48E-02 4.06E-02 1.07E-Ol 4.i0E-02 4.6SE-02 L4BKG01BJGSBSA28 7.47E+00 9.46E-Oi 4.20E-Oi 4.79E-02 4.98E-02 9.29E-02 S.69E-03 3.04E-02 S.13E-02 2.4iE-Oi 6.4SE-02 S.OlE-02 L4BKG01BJGSBSA29 7.33E+00 l.i7E+00 2.78E+OO 9.44E-03 1.26E-02 2.37E-02 1.60E-02 2.6iE-02 S.03E-02 4.S0E-02 3.S9E-02 6.81E-02 L4BKGOiBJGSBSA30 6.i7E+00 1.39E+00 S.37E-Oi 3.43E-04 1.23E-02 2.44E-02 2.0SE-02 2.8iE-02 S.S2E-02 1.6iE-02 3.33E-02 S.74E-02 6.62E+00 MEAN 4.40E-03 MEAN 3.72E-04 MEAN 2.64E-02 MEAN 8.S9E+OO MAX S.30E-02 MAX 3.79E-02 MAX 2.4iE-Oi MAX 9.49E-Oi STDEV 2.i6E-02 STDEV 1.38E-02 STDEV 6.00E-02 STDEV Page 20f6 TSD 12-003 Revision 0

SAMPLE ANALYSIS RESULTS FOR THORIUM - SUB SURFACE SOILS Sample Number Th-228 Th-230 Th-232 Activity 2 a Error MDA Activity 2 a Error MDA Activity 2 a Error MDA pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g L4BKG01BJGSBSA01 S.79E-02 8.20E-02 4.26E-02 6.74E-01 3.04E-01 2.08E-01 1.62E-01 1.43E-01 7.86E-02 L4BKG01QJGSBSA01 1.99E-02 5.99E-02 9.66E-02 7.79E-02 7.08E-02 2.30E-02 4.67E-02 6.45E-02 2.30E-02 L4BKG01BJGSBSA02 4.19E-02 4.63E-02 4.98E-02 4.51E-01 1.27E-01 5.51E-02 1.32E-01 7.02E-02 2.47E-02 l4BKG01BJGSBSA03 3.30E-02 4.4OE-02 3.42E-02 2.83E-01 1.20E-01 1.83E-02 4.50E-02 5.01E-02 3.38E-02 l4BKG01BJGSBSA04 1.51E-01 7.25E-02 4.35E-02 2.64E-01 9.53E-02 1.93E-02 1.31E-01 6.44E-02 1.93E-02 l4BKG01BJGSBSA05 1.56E-01 8.27E-02 6.79E-02 3.34E-01 1.19E-01 5.49E-02 1.79E-01 8.12E-02 1.20E-02 l4BKG01BJGSBSA06 8.85E-02 9.03E-02 8.48E-02 2.40E-01 1.40E-01 9.70E-02 4 .68E-02 6.25E-02 4.85E-02 L4BKG01BJGSBSA07 3.38E-01 1.88E-01 1.79E-01 3.69E-01 1.78E-01 9.26E-02 2.39E-01 1.50E-01 1.20E-01 L4BKG01BJGSBSA08 3.86E-02 5.50E-02 2.84E-02 5.34E-01 2.20E-01 2.81E-02 3.81E-02 5.43E-02 2.81E-02 L4BKG01BJGSBSA09 3.43E-02 6.08E-02 5.69E-02 6.29E-01 2.52E-01 5.64E-02 4.lOE-02 5.85E-02 3.03E-02 L4BKG01BJGSBSA10 2.64E-01 1.50E-01 1.37E-01 3.98E-01 1.72E-01 1.01E-01 4.05E-01 1.67E-01 4.51E-02 l4BKG01BJGSBSAll 3.03E-01 1.80E-01 1.30E-01 8.11E-01 2.95E-01 5.76E-02 2.24E-01 1.45E-01 5.76E-02 L4BKG01BJG5BSA12 4.50E-01 2.42E-01 1.96E-01 3.99E-01 2.20E-01 1.59E-01 1.42E-01 1.18E-01 3.48E-02 L4BKG01BJGSBSA13 1.45E-01 1.01E-01 6.90E-02 3.68E-01 1.62E-01 7.89E-02 1.91E-01 1.13E-01 5.58E-02 l4BKG01BJGSBSA14 6.07E-02 8~ 65E-02 4.47E-02 5.60E-01 2.80E-01 8.25E-02 1.40E-01 1.38E-01 8.25E-02 l4BKG01BJGSBSA15 3.64E-01 1.41E-01 8.03E-02 7.80E-01 2.18E-01 6.28E-02 3.38E-01 1.29E-01 1.51E-02 l4BKG01BJGSBSA16 7.17E-02 7.99E-02 5.38E-02 5.15E-02 6.87E-02 5.33E-02 1.94E-02 3.88E-02 2.86E-02 l4BKG01QJGSBSA16 1.78E-Ol 1.11E-01 1.14E-Ol 2.39E-01 1.16E-01 7.61E-02 2.02E-01 1.04E-01 4.82E-02 L4BKG01BJGSBSA17 2.25E-01 1.28E-01 1.41E-01 5.07E-01 l.66E-01 7.54E-02 1.92E-01 1.04E-01 6.75E-02 L4BKG01BJGSBSA18 7.18E-02 8.96E-02 8.43E-02 9.99E-02 9.76E-02 5.90E-02 4.30E-02 6.09E-02 3.17E-02 L4BKG01BJGSBSA19 2.95E-02 5.47E-02 8.45E-02 3.74E-01 1.32E-01 8.36E-02 7.77E-02 5.80E-02 2.79E-02 L4BKG01BJGSBSA20 2.02E-01 1.17E-01 7.58E-02 2.68E-01 1.30E-01 3.75E-02 2.14E-01 1.15E-01 3.75E-02 l4BKG01BJGSBSA21 3.17E-02 7.30E-02 9.43E-02 7.35E-03 5.36E-02 9.34E-02 O.OOE+OO O.OOE+OO 3.55E-02 Page 30f6 TSD 12-003 Revision 0

Sample Number Th-228 Th-230 Th-232 Activity 2 a Error MDA Activity 2 a Error MDA Activity 2 a Error MDA pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g l4BKG01BJGSBSA22 9.22E-02 9.3SE-02 3.40E-02 1.7SE-Ol 1.33E-Ol 6.26E-02 -7.92E-03 l.S9E-02 6.26E-02 l4BKG01BJGSBSA23 4.S2E-02 S.47E-02 S.9SE-02 1.79E-Ol 9.S2E-02 7.22E-02 4.47E-02 4.78E-02 4.17E-02 l4BKG01BJGSBSA24 2.39E-02 4.80E-02 3.52E-02 1.10E-Ol 1.09E-Ol 6.49E-02 3.91E-02 6.92E-02 6.49E-02 l4BKG01BJGSBSA2S S.S2E-02 7.80E-02 8.86E-02 1.3SE-Ol 1.06E-Ol 7.16E-02 9.22E-02 8.28E-02 2.72E-02 l4BKG01BJGSBSA26 6.53E-02 7.08E-02 9.1SE-02 3.84E-Ol 1.40E-Ol 9.06E-02 9.47E-02 7.1SE-02 6.04E-02 l4BKG01BJGSBSA27 1.49E-Ol 7.76E-02 S.OlE-02 2.48E-Ol 9.77E-02 2.22E-02 1.27E-Ol 6.77E-02 2.22E-02 l4BKG01BJGSBSA28 4.7SE-03 3.27E-02 6.0SE-02 6.02E-02 4.82E-02 3.20E-02 7.42E-02 S.07E-02 1.22E-02 l4BKG01BJGSBSA29 8.11E-02 6.37E-02 4.8SE-02 2.3SE-Ol 1.06E-Ol 3.92E-02 7.02E-02 S.93E-02 4.80E-02 l4BKG01BJGSBSA30 l.S6E-Ol 7.73E-02 1.09E-Ol 2.66E-Ol 7.4SE-02 3.92E-02 1.04E-Ol 4.88E-02 3.92E-02 1.26E-Ol MEAN 3.28E-Ol MEAN 1.21E-Ol MEAN 4.S0E-Ol MAX 8.11E-Ol MAX 4.0SE-Ol MAX 1.14E-Ol STDEV 2.09E-Ol STDEV 9.S4E-02 STDEV Page 4 of6 TSD 12-003 Revision 0

SAMPLE ANALYSIS RESULTS FOR URANIUM - SUB SURFACE SOILS Sample Number U-234 U-23S U-238 Activity 20 Error MDA Activity 20 Error MDA Activity 20 Error MDA pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g L4BKGOIBJGSBSAOl 3.06E-02 6.14E-02 4.S2E-02 O.OOE+OO 2.79E-02 S.S8E-02 O.OOE+OO O.OOE+OO 4.52E-02 l4BKGOIQJGSBSAOl 4.61E-02 8.13E-02 7.66E-02 O.OOE+OO 2.93E-02 S.08E-02 O.OOE+OO O.OOE+OO 4.11E-02 L4BKGOIBJGSBSA02 -L79E-02 2.54E-02 9.99E-02 -LllE-02 2.22E-02 8.7SE-02 4.26E-02 7.S2E-02 7.08E-02 L4BKGOIBJGSBSA03 -L09E-02 2.19E-02 8.64E-02 O.OOE+OO 2.84E-02 S.73E-02 2.0SE-02 6.66E-02 8.64E-02 L4BKGOIBJGSBSA04 S.86E-02 7.83E-02 6.07E-02 O.OOE+OO L86E-02 4.03E-02 O.OOE+OO LSIE-02 3.26E-02 L4BKGOIBJGSBSAOS 4.38E-02 8.80E-02 6.46E-02 O.OOE+OO O.OOE+OO 7.99E-02 O.OOE+OO O.OOE+OO 6.46E-02 L4BKGOlBJGSBSA06 4.74E-02 8.39E-02 7.87E-02 -l.23E-02 2.47E-02 9.73E-02 L72E-Ol 1.44E-Ol 4.23E-02 L4BKGOlBJGSBSA07 O.OOE+OO 2.26E-02 6.S4E-02 O.OOE+OO 2.79E-02 8.09E-02 O.OOE+OO 2.26E-02 6.54E c 02 L4BKGOlBJGSBSA08 7.36E-Ol 4.07E-Ol 3.23E-Ol L1DE-Ol LS6E-Ol 8.l0E-02 6.6SE-Ol 3.69E-Ol 2.11E-Ol L4BKGOlBJGSBSA09 6.8SE-02 6.69E-02 4.0SE-02 S.S6E-03 4.06E-02 7.07E-02 2.43E-02 4.30E-02 4.0SE-02 L4BKGOlBJGSBSAIO 3.0lE-Ol LSSE-Ol 8.43E-02 2.l9E-02 4.39E-02 3.23E-02 2.88E-Ol L56E-Ol L09E-Ol L4BKGOlBJGSBSAll 5.19E-02 6.48E-02 6.1DE-02 L94E-02 3.89E-02 2.86E-02 9.42E-02 7.74E-02 2.32E-02 L4BKGOlBJGSBSA12 8.09E-02 7.61E-02 7.93E-02 2.64E-02 4.66E-02 4.39E-02 7.30E-02 6.42E-02 3.SSE-02 L4BKGOlBJGSBSA13 3.8SE-02 S.l4E-02 3.98E-02 1.17E-02 3.80E-02 4.92E-02 L89E-02 4.3SE-02 5.63E-02 L4BKGOlBJGSBSAl4 O.OOE+OO O.OOE+OO 4.29E-02 -L2SE-02 2.5lE-02 9.88E-02 l.46E-Ol l.33E-Ol 4.29E-02 L4BKGOlBJGSBSAl5 2.00E-02 6.49E-02 8.4lE-02 O.OOE+OO O.OOE+OO S.S8E-02 6.l2E-02 8.74E-02 4.S2E-02 L4BKGOlBJGSBSAl6 2.S9E-Ol L2lE-Ol L09E-Ol Ll9E-02 2.37E-02 l.7SE-02 3.07E-Ol L20E-Ol 7.74E-02 L4BKGOlQJGSBSAl6 4.68E-Ol L60E-Ol 9.22E-02 1.4lE-02 6.32E-02 9.3lE-02 3.20E-Ol L46E-Ol l.30E-Ol L4BKGOIBJGSBSAl7 2.38E-Ol 1.17E-Ol 1.09E-Ol 2.35E-02 3.33E-02 l.74E-02 2.38E-Ol 1.07E-Ol 7.69E-02 L4BKGOlBJGSBSAl8 1.69E-Ol 9.99E-02 9.79E-02 -1.16E-02 4.02E-02 7.6SE-02 2.2SE-Ol 1.10E-Ol 9.79E-02 L4BKGOlBJGSBSAl9 2.00E-Ol l.33E-Ol l.43E-Ol LSSE-02 3.09E-02 2.28E-02 3.38E-Ol 1.45E-Ol 1.0lE-Ol L4BKGOlBJGSBSA20 LS7E-02 S.46E-02 7.34E-02 O.OOE+OO O.OOE+OO 2.87E-02 4.72E-02 S.SlE-02 2.32E-02 L4BKGOlBJGSBSA21 S.44E-02 6.54E-02 7.l7E-02 4.04E*02 4.67E-02 L98E-02 3.27E-02 4.87E-02 S.07E-02 Page 5 of6 TSD 12-003 Revision 0

Sample Number U-234 U-235 U-238 Activity 20 Error MDA Activity 20 Error MDA Activity 20 Error MDA pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g L4BKG01BJGSBSA22 9.36E-02 7.11E-02 1.97E-02 4.96E-02 7.40E-2 7.71E-02 1.34E-02 4.63E-2 6.23E-2 L4BKG01BJGSBSA23 4.79E-02 4.80E-02 1.77E-02 -2.96E-02 4 .19E-02 9.76E-02 2.40E-02 3.39E-02 1.77E-02 L4BKG01BJGSBSA24 1.64E-01 9.91E-02 9.25E-02 7.47E-03 3.02E-02 4.32E-02 2.29E-01 1.08E-01 6.05E-02 L4BKG01BJGSBSA25 2.42E-01 9.72E-02 6.76E-02 8.86E-04 2.39E-02 4.47E-02 1.96E-01 8.55E-02 5.11E-02 L4BKG01BJGSBSA26 1.42E-01 7.87E-02 6.62E-02 5.35E-03 2.16E-02 3.09E-02 1.73E-01 8.43E-02 5.59E-02 L4BKG01BJGSBSA27 1.75E-01 8.74E-02 4.03E-02 2.26E-02 3.22E-02 1.67E-02 2.11E-01 9.67E-02 4.03E-02 L4BKG01BJGSBSA28 1.86E-01 7.99E-02 5.30E-02 O.ooE+OO 0.00E+00 1.17E-02 1.66E-01 7.40E-02 4.48E-02 L4BKG01BJGSB5A29 5.28E-02 6.59E-02 6.21E-02 2.58E-02 5.92E-02 7.67E-02 6.81E-02 8.23E-02 9.81E-02 L4BKG01BJGSBSA30 -1.04E-02 2.07E-02 8.19E-02 O.ooE+OO 2.84E-02 5.43E-02 O.ooE+oo O.OOE+OO 4.40E-02 1.25E-01 MEAN 1.05E-02 MEAN 1.31E-01 MEAN 7.36E-01 MAX 1.10E-01 MAX 6.65E-01 MAX 1.57E-01 STDEV 2.43E-02 STDEV 1.47E-01 STDEV Page 6of6 TSD 12-003 Revision 0

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