ML19065A256

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Unit 1: Final Confirmatory Survey Summary and Results for the Non-Impacted Land Areas (License DPR-40, Docket No. 50-285)
ML19065A256
Person / Time
Site: Fort Calhoun Omaha Public Power District icon.png
Issue date: 02/27/2019
From: Altic N
Oak Ridge Institute for Science & Education
To: Jack Parrott
Office of Nuclear Material Safety and Safeguards
J PARROTT DUWP
References
DCN 5333-SR-01-0, DE-SC0014664, RFTA 19-001
Download: ML19065A256 (70)
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February 27, 2019 Mr. Jack Parrott, Sr. Project Manager U.S. Nuclear Regulatory Commission Office of Nuclear Materials and Safeguards Division of Decommissioning, Uranium Recovery, and Waste Programs Materials Decommissioning Branch TWFN Mail Stop T-8F5 Rockville, MD 20852

SUBJECT:

DOE Contract No. DE-SC0014664 CONFIRMATORY SURVEY

SUMMARY

AND RESULTS FOR THE NON-IMPACTED LAND AREAS ASSOCIATED WITH THE FORT CALHOUN NUCLEAR GENERATING STATION, BLAIR, NEBRASKA DOCKET NO. 50-285; RFTA 19-001; DCN 5333-SR-01-0

Dear Mr. Parrott:

Oak Ridge Institute for Science and Education (ORISE) is pleased to provide the attached final report for confirmatory survey activities of non-impacted land areas associated with the Fort Calhoun Nuclear Generating Station in Blair, Nebraska. Your comments have been incorporated into this final version.

Please feel free to contact me at 865.574.6273 or Erika Bailey at 865.576.6659 if you have any questions or comments.

Sincerely, Nick A. Altic, CHP Health Physicist/

Project Manager ORISE NAA:lw Attachment Electronic distribution: K. Conway, NRC S. Giebel, NRC E. Bailey, ORISE D. Hagemeyer, ORISE File/5333 100 ORAU Way

  • Oak Ridge
  • TN 37830
  • orise.orau.gov

CONFIRMATORY SURVEY

SUMMARY

AND RESULTS FOR THE NON-IMPACTED LAND AREAS ASSOCIATED WITH THE FORT CALHOUN NUCLEAR GENERATING STATION BLAIR, NEBRASKA N. A. Altic, CHP ORISE FINAL REPORT Prepared for the U.S. Nuclear Regulatory Commission February 2019 Further dissemination authorized to NRC only; other requests shall be approved by the originating facility or higher NRC programmatic authority.

ORAU provides innovative scientific and technical solutions to advance research and education, protect public health and the environment and strengthen national security. Through specialized teams of experts, unique laboratory capabilities and access to a consortium of more than 100 major Ph.D.-granting institutions, ORAU works with federal, state, local and commercial customers to advance national priorities and serve the public interest. A 501(c) (3) nonprofit corporation and federal contractor, ORAU manages the Oak Ridge Institute for Science and Education (ORISE) for the U.S. Department of Energy (DOE). Learn more about ORAU at www.orau.org.

NOTICES The opinions expressed herein do not necessarily reflect the opinions of the sponsoring institutions of Oak Ridge Associated Universities.

This report was prepared as an account of work sponsored by the United States Government.

Neither the United States Government nor the U.S. Department of Energy, nor any of their employees, makes any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe on privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, mark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement or recommendation, or favor by the U.S. Government or any agency thereof. The views and opinions of authors expressed herein do not necessarily state or reflect those of the U.S. Government or any agency thereof.

FCS Non-Impacted Land Areas 5333-SR-01-0

CONFIRMATORY SURVEY

SUMMARY

AND RESULTS FOR THE NON-IMPACTED LAND AREAS ASSOCIATED WITH THE FORT CALHOUN NUCLEAR GENERATING STATION BLAIR, NEBRASKA Prepared by Nick A. Altic, CHP FINAL REPORT Prepared for the U.S. Nuclear Regulatory Commission February 2019 This document was prepared for the U.S. Nuclear Regulatory Commission (NRC) by the Oak Ridge Institute for Science and Education (ORISE) through Interagency Agreement 31310018N0014 between the NRC and the U.S. Department of Energy (DOE). ORISE is managed by Oak Ridge Associated Universities under DOE contract number DE-SC0014664.

FCS Non-Impacted Land Areas 5333-SR-01-0

Prepared by: Date:

N. A. Altic, CHP, Health Physicist/Project Manager ORISE Reviewed by: Date:

P. H. Benton, Quality Manager ORISE Reviewed by: Date:

W. F. Smith, Senior Chemist ORISE Reviewed and approved for release by: Date:

E. N. Bailey, Survey and Technical Projects Group Manager ORISE FCS Non-Impacted Land Areas i 5333-SR-01-0

CONTENTS ACRONYM LIST ............................................................................................................................................ iv EXECUTIVE

SUMMARY

.............................................................................................................................. v

1. INTRODUCTION....................................................................................................................................... 1
2. SITE DESCRIPTION ................................................................................................................................. 1
3. DATA QUALITY OBJECTIVES ............................................................................................................. 3 3.1 STATE THE PROBLEM ........................................................................................................................ 3 3.2 IDENTIFY THE DECISION ................................................................................................................. 3 3.3 IDENTIFY INPUTS TO THE DECISION ............................................................................................. 4 3.3.1 Radionuclides of Concern ....................................................................................................... 4 3.4 DEFINE THE STUDY BOUNDARIES ................................................................................................. 5 3.5 DEVELOP A DECISION RULE ........................................................................................................... 5 3.6 SPECIFY LIMITS ON DECISION ERRORS.......................................................................................... 6 3.7 OPTIMIZE THE DESIGN FOR OBTAINING DATA .......................................................................... 7
4. FIELD PROCEDURES .............................................................................................................................. 7 4.1 REFERENCE SYSTEM ......................................................................................................................... 8 4.2 SURFACE SCANS ................................................................................................................................. 8 4.3 SOIL SAMPLING .................................................................................................................................. 8
5. SAMPLE ANALYSIS AND DATA INTERPRETATION ................................................................. 9 5.1 LABORATORY ANALYSIS ................................................................................................................... 9 5.2 GRAPHICAL PLOTS ............................................................................................................................ 9 5.3 STATISTICAL TEST ...........................................................................................................................10
6. FINDINGS AND RESULTS ...................................................................................................................10 6.1 SURFACE SCANS ...............................................................................................................................10 6.2 SOIL SAMPLING ................................................................................................................................11 6.3 EVALUATION OF ANALYTICAL DATA...........................................................................................12
7.

SUMMARY

AND CONCLUSION ........................................................................................................14

8. REFERENCES ...........................................................................................................................................15 APPENDIX A FIGURES APPENDIX B SOIL SAMPLE ANALYTICAL RESULTS APPENDIX C MAJOR INSTRUMENTATION APPENDIX D SURVEY AND ANALYTICAL PROCEDURES FCS Non-Impacted Land Areas ii 5333-SR-01-0

FIGURES Figure 2.1. FCS Site Overview (adapted from TSSD 2017 and Google Maps) ....................................... 2 Figure 2.2. Phase 1 and 2 of Request for Partial Site Release (NRC 2018) ............................................... 2 Figure 6.1. Q-Q Plot for Phase 1 and 2 Gamma Walkover NaI Detector Response ...........................11 Figure 6.2. Q-Plot for Cs-137 Concentration in Confirmatory Soil Samples .........................................12 Figure 6.3. Retrospective Power Analysis of Confirmatory Survey Decision ........................................13 TABLES Table 3.1. FCS Confirmatory Survey Decision Process ............................................................................... 4 Table 6.1. Summary Statistics for Cs-137 in Soil (pCi/g) ..........................................................................12 FCS Non-Impacted Land Areas iii 5333-SR-01-0

ACRONYM LIST AA alternate actions cpm counts per minute Cs-137 Cesium-137 DQO data quality objectives FCS Fort Calhoun Station GPS global positioning system MDC minimum detectable concentration NaI sodium iodide NRC U.S. Nuclear Regulatory Commission OPPD Omaha Public Power District ORISE Oak Ridge Institute for Science and Education pCi/g picocuries per gram PSQ principal study question Q quantile Q-Q quantile-quantile ROC radionuclide of concern SAFSTOR SAFe STORage SU survey unit UPL95 95% upper prediction limit VSP Visual Sample Plan FCS Non-Impacted Land Areas iv 5333-SR-01-0

CONFIRMATORY SURVEY

SUMMARY

AND RESULTS FOR THE NON-IMPACTED LAND AREAS ASSOCIATED WITH THE FORT CALHOUN NUCLEAR GENERATING STATION, BLAIR, NEBRASKA EXECUTIVE

SUMMARY

The U.S. Nuclear Regulatory Commission (NRC) requested that Oak Ridge Institute for Science and Education (ORISE) perform confirmatory survey activities of areas classified by the licensee as non-impacted. The confirmatory survey is intended to generate independent radiological data for the NRCs evaluation of the non-impacted classification assigned to land areas included in the licensees request for partial site release. The confirmatory survey, performed November 27-29, 2018, included surface gamma scanning and collection of randomly selected volumetric soil samples. No elevated direct radiation was identified during surface gamma scanning. Subsequently, no judgmental samples were collected. Radionuclides that were identified in soil samples were attributable to natural sources and not site operations.

Evaluation of the Cs-137 background data set and the ORISE confirmatory data set was performed via the one-sample Sign test. Based on the results of the Sign test, there is no evidence to reject the null hypothesis in favor of the alternativei.e., the mean Cs-137 concentration of the confirmatory samples is not statistically greater than that reported in the background evaluation document.

ORISE did not identify anomalies that would prevent the classification subject areas as non-impacted.

FCS Non-Impacted Land Areas v 5333-SR-01-0

1. INTRODUCTION The Fort Calhoun Station (FCS) is a commercial nuclear power plant, located near Blair, Nebraska, that was operated by the Omaha Public Power District (OPPD) under U.S. Nuclear Regulatory Commission (NRC) license No. DPR-40. FCS is a Combustion Engineering pressurized water reactor, rated at 1,500 megawatt thermal, which operated from 1973 to 2016 (TSSD 2017). After shutdown the fuel was removed from the reactor vessel and the plant was placed in SAFe STORage (SAFSTOR).

OPPD has requested NRCs approval for the removal of approximately 241 hectares (595 acres) from their Code of Federal Regulations Title 10, Part 50 license. OPPD is requesting the partial site release in two Phases: Phase 1 and Phase 2 (OPPD 2018a and 2018b), each of which is a separate land area as described in Section 2. The land areas associated with the requests have been categorized as non-impacted by the licensee and, as such, plant-derived radionuclides in concentrations exceeding background should not be present. Characterization surveys to substantiate the non-impacted classification were performed by the licensee, and results are summarized in the requests for partial site release.

2. SITE DESCRIPTION The FCS is located approximately 32 kilometers (20 miles) north of Omaha, Nebraska, in Washington County; Figure 2.1 provides an overview of the site boundary. The site is approximately 243 hectares (600 acres) and is bounded on the east by the Missouri River and by U.S. Highway 75 on the west. In addition to the primary site, OPPD owns a perpetual easement on 192 hectares (475 acres) of land east of the Missouri River in the state of Iowa.

Figure 2.2 depicts land areas associated with Phase 1 and 2 of the request for partial site releasethe focus of this confirmatory assessment. The surface land is relatively flat and averages approximately 305 meters (1,000 feet) above mean sea level. Land area surrounding the site is primarily used for farming activities, including the land area of Phase 2.

FCS Non-Impacted Land Areas 1 5333-SR-01-0

Figure 2.1. FCS Site Overview (adapted from TSSD 2017 and Google Maps)

Phase 1 Phase 2 Figure 2.2. Phase 1 and 2 of Request for Partial Site Release (NRC 2018)

FCS Non-Impacted Land Areas 2 5333-SR-01-0

3. DATA QUALITY OBJECTIVES The data quality objectives (DQOs) described herein are consistent with the Guidance on Systematic Planning Using the Data Quality Objectives Process (EPA 2006) and provided a formalized method for planning radiation surveys, improving survey efficiency and effectiveness, and ensuring that the type, quality, and quantity of data collected were adequate for the intended decision applications. The seven steps in the DQO process are outlined below:
1. State the problem
2. Identify the decision/objective
3. Identify inputs to the decision/objective
4. Define the study boundaries
5. Develop a decision rule
6. Specify limits on decision errors
7. Optimize the design for obtaining data 3.1 STATE THE PROBLEM The first step in the DQO process defined the problem that necessitated the study. The licensee for the FCS is requesting approval from the NRC to remove non-impacted survey areas from its 10 CFR Part 50 license. The NRC requested ORISE to perform confirmatory surveys at FCS to provide independent contractor documentation and field reviews, and generate radiological data, to assist the NRC in evaluating the licensees request for partial site release. Therefore, the problem statement was as follows:

Confirmatory surveys must be performed to generate independent radiological data to assist the NRC with their assessment of the non-impacted classification of land areas included in the licensees request for partial site release.

3.2 IDENTIFY THE DECISION The second step in the DQO process identified the principal study question (PSQ) and alternate actions (AAs), developed a decision statement, and organized multiple decisions, as appropriate.

This was done by specifying AAs that could result from a yes response to the PSQ and combining FCS Non-Impacted Land Areas 3 5333-SR-01-0

the PSQ and AAs into a decision statement. Table 3.1 presents the PSQ, AAs, and combined decision statement.

Table 3.1. FCS Confirmatory Survey Decision Process Principal Study Question Alternative Actions Yes:

Compile confirmatory data and report results to the NRC for their decision making. Provide independent interpretation that confirmatory field surveys did not identify anomalous areas of residual radioactivity and quantitative laboratory data are consistent with background values, and/or that statistical sample population Are radionuclide concentrations in the examination/assessment conditions are met.

non-impacted land areas consistent with background concentration? No:

Compile confirmatory data and report results to the NRC for their decision making. Provide independent interpretation of confirmatory survey results identifying any anomalous field or laboratory data and/or when statistical sample population examination/assessment conditions are not satisfied for the NRCs determination of the adequacy of the characterization survey.

Decision Statement Confirmatory survey results do/do not identify anomalous results or other conditions that refute the non-impacted classification of the subject land areas.

3.3 IDENTIFY INPUTS TO THE DECISION The third step in the DQO process identified both the information needed and the sources of this information, determined the basis for action levels, and identified sampling and analytical methods to meet data requirements. For this effort, information inputs included the following:

  • OPPD characterization and background study soil sample analytical results
  • ORISE soil sample analytical results
  • ORISE gamma walkover surveys 3.3.1 Radionuclides of Concern The primary radionuclides of concern (ROCs) identified for the FCS are beta-gamma emitters fission and activation productsresulting from reactor operation (OPPD 2018c). Previous review FCS Non-Impacted Land Areas 4 5333-SR-01-0

of the facility operating history, historical events, and the results of radiological surveys documented in the historical site assessment in accordance with 10 CFR 50.83(a)(2) has been completed (OPPD 2018a). As a result of the review, the subject land areas were classified as non-impacted, meaning that any of the plant-derived ROCs should not be present in excess of background.

The only plant-derived fission-product that would be detectable in background is Cs-137, which is due to global fallout (OPPD 2018a and 2018b). A background study to evaluate the Cs-137 concentration in the non-impacted land areas due to global fallout was performed (OPPD 2018d).

The mean Cs-137 concentration in soils surrounding the subject land areas is 0.104 picocuries per gram (pCi/g), with standard deviation of 0.105 pCi/g (OPPD 2018d). It is noted that the mean background concentration was calculated with minimum detectable (MDC) values in lieu of actual sample results, which has the potential to bias the mean high. However, in this case the mean calculated using the OPPD 2018d background data set, excluding the MDC values, yields a value slightly larger than the stated value of 0.104 pCi/g. Therefore, subsequent decision rules were evaluated using the Cs-137 background concentration stated in OPPD 2018d.

3.4 DEFINE THE STUDY BOUNDARIES The fourth step in the DQO process defined targeted populations and spatial boundaries, determined the timeframe for collecting data and making decisions, addressed practical constraints, and determined the smallest subpopulations, area, volume, and time for which separate decisions must be made. The licensee has subdivided the subject land areas into multiple survey units (SUs).

SUs associated with Phase 1 are: L4-001, L4-002, and L4003; Phase 2 is composed of SUs E4-001 and E4-002. Temporal boundaries to complete this survey were limited to two and a half 10-hour days on site. Based on the relatively uniform Cs-137 variability (presented in OPPD 2018e), the five SUs were combined into a single confirmation unit.

3.5 DEVELOP A DECISION RULE The fifth step in the DQO process specified appropriate population parameters (e.g., mean, median), confirmed action levels were above detection limits, and developed an ifthen decision rule statement. As discussed in Section 3.3, Cs-137 was the only plant-derived ROC expected in concentrations above the analytical MDC. Therefore, for this survey effort, the parameter of interest was the mean Cs-137 concentration in the non-impacted land areas. The mean Cs-137 concentration FCS Non-Impacted Land Areas 5 5333-SR-01-0

in the non-impacted land areas was compared against the background mean concentration via a one-sample statistical hypothesis test. Hypothesis testing adopts a scientific approach where the survey data are used to select between the baseline condition (the null hypothesis, H0), and an alternative condition.

The null and alternative hypotheses were stated as:

H0: Non-impacted land-area Cs-137 concentration population mean/median (CU) is less than or equal to the background mean concentration (B).

HA: Non-impacted land-area Cs-137 concentration population mean/median is greater than the background mean concentration.

The Sign test is a non-parametric statistical test of the median concentration and does not account for the magnitude of individual results. Therefore, individual sample results must also be evaluated against an elevated measurement action level threshold. The 95% upper prediction limit (UPL95),

based on the Chebyshev inequality, of the OPPD background Cs-137 concentration data set was used as the action level threshold. The UPL95 based on the Chebyshev inequality was chosen as it does not require any assumptions regarding data distribution. The UPL95 was determined to be equal to 0.599 pCi/g by using ProUCL, version 5.1.

The decision rule was stated as follows:

If the null hypothesis is not rejected and each individual sample result is below the UPL95if applicable, then conclude survey area Cs-137 concentrations are consistent with background; otherwise, perform further evaluation(s) and provide technical comments/recommendations.

3.6 SPECIFY LIMITS ON DECISION ERRORS The sixth step in the DQO process specified the decision makers limits on decision errors, which were then used to establish performance goals for the survey. There are two types of decision errors to consider, Type I (typically designated as alpha or ) and Type II (typically designated as beta or ).

A Type I error occurs when the null hypothesis is rejected when it should not be, also known as a false positive, and reflects the confidence level in the decision. A Type II error is incorrectly failing FCS Non-Impacted Land Areas 6 5333-SR-01-0

to reject the null hypothesis when the alternative hypothesis is true. The ability to reject the null hypothesis when it is false is known as the power of the test (power is defined as 1- ). This is also known as a false negative. Two orders of control were implemented to minimize decision errors regarding decision statements introduced in Table 3.1.

The first order of control was to select decision error rates that were conservative yet still allowed for the project to be completed within the study boundaries. The Type I error rate was set to 0.05, that is, a 5% chance of concluding the survey area is not representative of background when it actually is. The Type II error rate and subsequent power achieved is dependent on the number of samples collected and the concentration variability in the sample set. A discussion of the planned sensitivity of the statistical test relative to actual sensitivity is provided in Section 6.3.

The second order of control was to optimize the confirmatory field measurement and laboratory analytical MDCs. Field scanning MDCs were minimized by following the procedures referenced in Section 4.

3.7 OPTIMIZE THE DESIGN FOR OBTAINING DATA The seventh step in the DQO process included review of the DQO outputs, developing data collection design alternatives, formulating the mathematical expressions for each design, selecting the sample size to satisfy DQOs, deciding on the most resource-effective design of agreed alternatives, and documenting the requisite details. Specific survey procedures are presented in Section 4.

4. FIELD PROCEDURES The ORISE survey team performed visual inspections, measurements, and sampling activities within accessible portions of the Phase 1 and Phase 2 non-impacted open-land areas. Survey activities were conducted in accordance with the ORAU Radiological and Environmental Survey Procedures Manual and the ORAU Environmental Services and Radiation Training Quality Program Manual (ORAU 2016b and 2018).

FCS Non-Impacted Land Areas 7 5333-SR-01-0

4.1 REFERENCE SYSTEM Global positioning system (GPS) coordinates were used for referencing measurement and sampling locations. The specific reference system used was NAD 1983 (CORS96) Nebraska State Plane federal information processing standards 2600 in meters.

4.2 SURFACE SCANS Surface scans of land areas were performed with Ludlum Model 44-10 sodium iodide (NaI) scintillation detectors coupled to Ludlum Model 2221 ratemeter-scalers with audible indicators.

Ratemeter-scalers were also coupled to GPS systems that enabled real time gamma count rate and spatial data capture. A 50 meter x 50 meter area (2,500 m2 grid) was delineated around each random soil sample location. Low to medium density surface scans were performed within each grid. Three grids were located in heavily forested areas, which prevented gamma walkover surveys (see Section 6.1 for further discussion). Scans were also performed in judgmentally selected areas based on the potential for run-off accumulation, migration pathways, and indication of anthropogenic disturbance. Additionally, instrument response was captured when survey personnel navigated to the next sampling location. It is noted that certain randomly selected locations were positioned in forested areas resulting in limitations to scan density.

4.3 SOIL SAMPLING The prospective number of samples required to meet project DQOs was determined using Visual Sample Plan (VSP), version 7.7a, with the licensees characterization data as inputs (ORISE 2018). In all, 25 surface soil sampling locations were randomly selected. One-minute static NaI counts were performed at each sample location pre- and post-sample collection. The static measurement was used to assess if there was a potential for contamination at depth. No elevated radiation levels of concern were noted at depth at any of the sample locations. Appendix A, Figures A.1 and A.2 present soil sampling locations in Phase 1 and Phase 2, respectively.

FCS Non-Impacted Land Areas 8 5333-SR-01-0

5. SAMPLE ANALYSIS AND DATA INTERPRETATION 5.1 LABORATORY ANALYSIS Samples and data collected on site were transferred to the ORISE facility for analysis and interpretation. Sample custody was transferred to the Radiological and Environmental Analytical Laboratory in Oak Ridge, Tennessee. Sample analyses were performed in accordance with the ORAU Radiological and Environmental Analytical Laboratory Procedures Manual (ORAU 2017). Soil samples were crushed, homogenized, and analyzed by gamma spectrometry for gamma-emitting fission and activation products. The spectra were also reviewed for other identifiable photopeaks; in particular, ROCs characterized by multiple direct or progeny photopeaks were compared for concentration consistency to identify those photopeaks that may have had interference by the presence of one or more of the other ROCs. Analytical results are reported as gross concentrations in units of pCi/g.

5.2 GRAPHICAL PLOTS Gamma radiation scan results are presented as gross count per minute (cpm) results. Walkover data were binned, color coded, and presented in posting plots.

Gamma walkover scan data and Cs-137 soil sample results were graphically displayed using quantile-quantile (Q-Q) plots. The Q-Q plot is a graphical technique for evaluating the population distribution of a data set. Population distributional aspects can be evaluated in a single plot, such as:

shifts in scale, changes in symmetry (skewness of data), and the presence of outliers (due to contamination).

Q-Q plots were generated using R, version 3.5.2. In viewing the Q-Q plots, the Y-axis represents the measurement result (in either units of cpm or pCi/g). The X-axis represents the data quantiles about the mean value. A normal distribution that is not skewed by outlierse.g., a background radiation populationwill appear as a straight line, with the slope of the line subject to the degree of variability among the data population. Values less than the mean are represented in the negative quantiles, and the values greater than the mean are represented in the positive quantiles. More than one population distribution, such as multiple background distributions or background plus contamination, will appear as an exponential-shaped function.

FCS Non-Impacted Land Areas 9 5333-SR-01-0

5.3 STATISTICAL TEST The Sign test is performed by subtracting the mean background Cs-137 concentration from each confirmatory soil sample. The number of positive differences are then summed. This value, denoted as S+, is the Sign test statistic. A positive difference corresponds to a measurement above the mean background concentration and evidence that the median decision area concentration may exceed the background value. S+ is then compared to the critical value (k). If S+ is greater than k, then the null hypothesis is rejected in favor of the alternative. If S+ is less than k, then there is insufficient evidence to reject the null hypothesis. It should be noted that failing to reject the null hypothesis does not mean the null is true.

6. FINDINGS AND RESULTS 6.1 SURFACE SCANS Surface scan maps for Phase 1 and Phase 2 are presented in Figures A.3 through A.5 and Figures A.6 through A.12, respectively. NaI detector response ranged from approximately 5,600 cpm to 13,000 cpm with mean of approximately 9,100 cpm in the Phase 1 land area. For the Phase 2 land area, NaI detector response ranged from approximately 4,000 to 12,000 cpm with an average of approximately 8,200 cpm. Figure 6.1 provides a Q-Q plot of the scan data collected from each phase. Based on the straight line of the Q-Q plot, the scan data collected from both phases represent an approximately normally distributed background data set. As indicated by the step-type function in Figure 6.1, the Phase 2 scan data were collected from areas with two different gamma backgrounds, though still normally distributed. No areas in either Phase 1 or Phase 2 were flagged for additional investigation; direct gamma radiation levels were not audibly distinguishable from localized background.

FCS Non-Impacted Land Areas 10 5333-SR-01-0

Figure 6.1. Q-Q Plot for Phase 1 and 2 Gamma Walkover NaI Detector Response Grids associated with sample locations 5333S0019, -21, -22, and -24 were located in areas of heavy vegetation that prevented adequate gamma walkovers. Surveys were initially attempted in grid 5333S0019; however, vegetation posed a personnel safety risk. In lieu of surface scans in the aforementioned grids, areas near the vegetation boundary were scanned. The survey team investigated and sampled 5333S0005 without the GPS equipment due to logistical constraints.

Therefore, scans were performed without real-time data capture. The surveyor did not identify any anomalies and determined that NaI detector response was consistent with the other grids in Phase 1.

6.2 SOIL SAMPLING Individual confirmatory soil sample results are presented in Appendix B. As previously discussed, the primary ROCs identified for the FCS are beta-gamma emittersfission and activation productsresulting from reactor operation (OPPD 2018c), and the only ROC detectable should be Cs-137 (OPPD 2018a and 2018b). Cesium-137 was positively identified, above the analytical MDC, in 16 of the 25 randomly selected confirmatory soil samples.

Table 6.1 presents Cs-137 summary statistics for soil samples collected in Phase 1, Phase 2, and the collective confirmatory unit. The maximum Cs-137 concentration of 0.372 pCi/g was observed in a Phase 2 sample (5333S0024). The average Cs-137 concentration for the confirmatory survey FCS Non-Impacted Land Areas 11 5333-SR-01-0

decision area (Phase 1 and 2 combined) was 0.09 pCi/g, which is less than the mean background concentration. Other radionuclides detected in the soil samples are naturally occurring and not attributable to site operations.

Table 6.1. Summary Statistics for Cs-137 in Soil (pCi/g)

Survey Area Min Max Mean Median SD All -0.005 0.372 0.09 0.05 0.09 Phase 1 0.078 0.224 0.1 0.1 0.05 Phase 2 -0.005 0.372 0.07 0.04 0.09 Figure 6.2 provides a quantile (Q) plot of Cs-137 concentrations in soil samples. As indicated by the exponential-shaped curve, the data are not normally distributed. Further evaluation using ProUCL, version 5.1, concluded that the Cs-137 confirmatory data set follows a lognormal distribution.

Figure 6.2. Q-Plot for Cs-137 Concentration in Confirmatory Soil Samples 6.3 EVALUATION OF ANALYTICAL DATA As stated earlier, a one-sample Sign test was performed using the confirmatory data set relative to a fixed value of 0.104 pCi/gthe mean Cs-137 background concentration reported in the background evaluation. The Sign test statistic (S+), which is the number of values that are above 0.104 pCi/g, was 9 compared to the 95% critical value of 17. Since S+ is less than the critical value, FCS Non-Impacted Land Areas 12 5333-SR-01-0

the null hypothesis cannot be rejected. That is, there is not enough evidence to conclude that the subject area has a mean/median Cs-137 concentration greater than the background mean concentration. Due to the manner in which the hypotheses were statedthe subject area is less than background by defaulta retrospective analysis of the test performance was evaluated. The retrospective power was estimated using the approach outlined in NUREG-1505 (NRC 1998).

Figure 6.3 provides a retrospective power curve for the Sign test relative to the prospective power curvewhich was based on the planned use of the one-sample t-test.

Figure 6.3. Retrospective Power Analysis of Confirmatory Survey Decision Nonparametric tests, such as the Sign test, do not consider the magnitude of individual results.

Therefore, Cs-137 concentrations were compared to a background threshold value (BTV) in order to evaluate the presence of non-background related data points. The maximum Cs-137 result of 0.372 pCi/g was less than the BTV of 0.599 pCi/g, as would be expected from a confirmatory survey data set representative of background.

FCS Non-Impacted Land Areas 13 5333-SR-01-0

7.

SUMMARY

AND CONCLUSION At NRCs request, ORISE conducted independent confirmatory surveys of areas classified by the licensee as non-impacted. The confirmatory survey is intended to ensure, if supported by the data, the non-impacted classification of land areas included in the licensees request for partial site release.

The confirmatory survey, performed November 27-29, 2018, included surface gamma scanning and collection of randomly selected volumetric soil samples All individual confirmatory samples collected from the subject land areas were below the UPL95, based on the background data set. The Cs-137 mean concentration in the Phase 1 and 2 parcels was 0.09 pCi/g, which is less than the mean background concentration reported in OPPD 2018d. Based on the parameters established by project-specific DQOs, confirmatory survey data do not provide sufficient evidence that Cs-137 concentrations in the non-impacted land areas are greater than background.

FCS Non-Impacted Land Areas 14 5333-SR-01-0

8. REFERENCES EPA 2006. Guidance on Systematic Planning Using the Data Quality Objectives Process. EPA QA/G-4.

U.S. Environmental Protection Agency. Washington, D.C. February.

NRC 1998. A Nonparametric Statistical Methodology for the Design and Analysis of Final Status Decommissioning Surveys. NUREG-1505, Rev. 1. U.S. Nuclear Regulatory Commission. Washington D.C. June.

NRC 2018. RE: Fort Calhoun submittal. Email from J. Parrott, NRC to E. Bailey, ORISE.

October 29.

OPPD 2018a. Fort Calhoun Station, Unit 1 Request for Partial Site Release Phase 1. Omaha Public Power District. Omaha, Nebraska. June 29.

OPPD 2018b. Fort Calhoun Station, Unit 1 Request for Partial Site Release Phase 2. Omaha Public Power District. Omaha, Nebraska. November 12.

OPPD 2018c. Potential Radionuclides of Concern during the Decommissioning of Fort Calhoun Station.

FC-18-002. Omaha Public Power District. Omaha, Nebraska. March 18.

OPPD 2018d. Evaluation of Cs-137 Global Fallout in Soils at Fort Calhoun Station. FC-18-003. Omaha Public Power District. Omaha, Nebraska. June 26.

OPPD 2018e. Partial Site Release Radiological Measurements. FC-18-001. Omaha Public Power District.

Omaha, Nebraska. June 26.

ORAU 2014. ORAU Radiation Protection Manual. Oak Ridge Associated Universities. Oak Ridge, Tennessee. October.

ORAU 2016a. ORAU Health and Safety Manual. Oak Ridge Associated Universities. Oak Ridge, Tennessee. January.

ORAU 2016b. ORAU Radiological and Environmental Survey Procedures Manual. Oak Ridge Associated Universities. Oak Ridge, Tennessee. November 10.

ORAU 2017. ORAU Radiological and Environmental Analytical Laboratory Procedures Manual. Oak Ridge Associated Universities. Oak Ridge, Tennessee. August 24.

ORAU 2018. ORAU Environmental Services and Radiation Training Quality Program Manual. Oak Ridge Associated Universities. Oak Ridge, Tennessee. July 20 ORISE 2018. Project-Specific Plan for Confirmatory Survey Activities of Non-impacted Land Areas Associated with The Fort Calhoun Nuclear Generating Station Blair, Nebraska. Oak Ridge Institute for Science and Education. Oak Ridge, Tennessee. November 21.

TSSD 2017. Fort Calhoun Nuclear Station Limited Site Non-Radiological Characterization Survey Report.

TSSD Services, Incorporated. Oakland, Main. January.

FCS Non-Impacted Land Areas 15 5333-SR-01-0

APPENDIX A FIGURES FCS Non-Impacted Land Areas 5333-SR-01-0

Figure A.1 Phase 1 Soil Sampling Locations FCS Non-Impacted Land Areas A-1 5333-SR-01-0

Figure A.2 Phase 2 Soil Sampling Locations FCS Non-Impacted Land Areas A-2 5333-SR-01-0

Figure A.3 Gamma Walkover of Phase 1 (1 of 3)

FCS Non-Impacted Land Areas A-3 5333-SR-01-0

Figure A.4 Gamma Walkover of Phase 1 (2 of 3)

FCS Non-Impacted Land Areas A-4 5333-SR-01-0

Figure A.5 Gamma Walkover of Phase 1 (3 of 3)

FCS Non-Impacted Land Areas A-5 5333-SR-01-0

Figure A.6 Gamma Walkover of Phase 2 (1 of 7)

FCS Non-Impacted Land Areas A-6 5333-SR-01-0

Figure A.7 Gamma Walkover of Phase 2 (2 of 7)

FCS Non-Impacted Land Areas A-7 5333-SR-01-0

Figure A.8 Gamma Walkover of Phase 2 (3 of 7)

FCS Non-Impacted Land Areas A-8 5333-SR-01-0

Figure A.9 Gamma Walkover of Phase 2 (4 of 7)

FCS Non-Impacted Land Areas A-9 5333-SR-01-0

Figure A.10 Gamma Walkover of Phase 2 (5 of 7)

FCS Non-Impacted Land Areas A-10 5333-SR-01-0

Figure A.11 Gamma Walkover of Phase 2 (6 of 7)

FCS Non-Impacted Land Areas A-11 5333-SR-01-0

Figure A.12 Gamma Walkover of Phase 2 (7 of 7)

FCS Non-Impacted Land Areas A-12 5333-SR-01-0

APPENDIX B SOIL SAMPLE ANALYTICAL RESULTS FCS Non-Impacted Land Areas 5333-SR-01-0

Gamma Spectrometry Summary Sheet Report Date: January 07, 2019 Project # : 201215583 COC # : 1812-001 Project Name: Ft Calhoun Batch Number: GS0866 Analyst: iveyw Client Sample ID: 5333S0002 Lab Sample ID: 15583S0001 Smp Qty.: 540.74 Units: g Geometry: 250FM Detector ID: DET07 Live Time(s): 7,200 SOP (Rev. #): CP1 (21)

Count Date: 12/7/2018 Receipt Date: 12/3/2018 Collection Date: 11/27/2018 SDG: 201215583-1 Energy Qualifier Duplicate Meas./Known Signature Energy Error Activity Ratio Analyte (keV) Result TPU (2s) MDC Units (keV) Ratio Am-241 59.54 -0.021 0.029 0.071 pCi/g U N/A N/A Bi-212 727.33 0.82 0.24 0.45 pCi/g 726.99 N/A N/A Bi-214 609.32 0.648 0.069 0.061 pCi/g 609.11 N/A N/A Co-57 122.06 -0.010 0.011 0.024 pCi/g U N/A N/A Co-60 1332.49 -0.014 0.022 0.041 pCi/g U N/A N/A Cs-134 795.86 0.051 0.023 0.056 pCi/g U N/A N/A Cs-137 661.66 0.078 0.017 0.028 pCi/g 661.44 N/A N/A Eu-152 344.28 0.015 0.045 0.101 pCi/g U N/A N/A Eu-154 723.30 -0.235 0.099 0.223 pCi/g U N/A N/A Eu-155 105.31 0.042 0.025 0.057 pCi/g 104.90 U N/A N/A K-40 1460.82 14.5 1.2 0.4 pCi/g 1460.48 N/A N/A Mn-54 834.85 0.004 0.014 0.048 pCi/g U N/A N/A Th-228 by Pb-212 238.63 0.743 0.056 0.050 pCi/g 238.48 N/A N/A Ra-226 by Pb-214 351.93 0.674 0.059 0.051 pCi/g 351.80 N/A N/A Ra-226 186.21 1.49 0.25 0.44 pCi/g 185.76 N/A N/A Se-75 264.66 -0.001 0.018 0.041 pCi/g U N/A N/A U-238 by Th-234 63.29 0.46 0.23 0.48 pCi/g 63.28 U N/A N/A U-235 143.76 0.059 0.058 0.135 pCi/g 143.65 U N/A N/A Zn-65 1115.54 -0.092 0.055 0.114 pCi/g U N/A N/A Qualifier Flags:

U = Analyte not detected (< MDC)

TPU = Total Propagated Uncertainty MDC = Minimum Detectable Concentration FCS Non-Impacted Land Areas B-1 5333-SR-01-0

Gamma Spectrometry Summary Sheet Report Date: January 07, 2019 Project # : 201215583 COC # : 1812-001 Project Name: Ft Calhoun Batch Number: GS0866 Analyst: iveyw Client Sample ID:

Lab Sample ID: 15583S0001Dup Smp Qty.: 540.74 Units: g Geometry: 250FM Detector ID: DET10 Live Time(s): 7,200 SOP (Rev. #): CP1 (21)

Count Date: 12/13/2018 Receipt Date: 12/3/2018 Collection Date:

SDG: 201215583-1 Energy Qualifier Duplicate Meas./Known Signature Energy Error Activity Ratio Analyte (keV) Result TPU (2s) MDC Units (keV) Ratio Am-241 59.54 -0.090 0.065 0.154 pCi/g U 1.88 N/A Bi-212 727.33 0.71 0.21 0.39 pCi/g 727.09 0.65 N/A Bi-214 609.32 0.725 0.077 0.065 pCi/g 609.15 1.46 N/A Co-57 122.06 -0.001 0.012 0.030 pCi/g U 1.05 N/A Co-60 1332.49 -0.014 0.013 0.041 pCi/g U 0.04 N/A Cs-134 795.86 0.040 0.022 0.050 pCi/g U 0.70 N/A Cs-137 661.66 0.086 0.016 0.030 pCi/g 661.53 0.59 N/A Eu-152 344.28 0.005 0.042 0.099 pCi/g U 0.29 N/A Eu-154 723.30 -0.204 0.081 0.170 pCi/g U 0.48 N/A Eu-155 105.31 0.066 0.041 0.092 pCi/g 105.17 U 0.96 N/A K-40 1460.82 14.0 1.1 0.7 pCi/g 1460.34 0.61 N/A Mn-54 834.85 0.0103 0.0093 0.0334 pCi/g 835.03 U 0.72 N/A Th-228 by Pb-212 238.63 0.714 0.053 0.057 pCi/g 238.54 0.75 N/A Ra-226 by Pb-214 351.93 0.789 0.065 0.063 pCi/g 351.85 2.58 N/A Ra-226 186.21 1.50 0.27 0.70 pCi/g 185.87 0.04 N/A Se-75 264.66 0.006 0.021 0.049 pCi/g U 0.45 N/A U-238 by Th-234 63.29 0.84 0.46 0.97 pCi/g 63.05 U 1.43 N/A U-235 143.76 0.04 0.11 0.26 pCi/g U 0.36 N/A Zn-65 1115.54 -0.279 0.073 0.090 pCi/g U 3.99 N/A Qualifier Flags:

U = Analyte not detected (< MDC)

TPU = Total Propagated Uncertainty MDC = Minimum Detectable Concentration FCS Non-Impacted Land Areas B-2 5333-SR-01-0

Gamma Spectrometry Summary Sheet Report Date: January 07, 2019 Project # : 201215583 COC # : 1812-001 Project Name: Ft Calhoun Batch Number: GS0866 Analyst: iveyw Client Sample ID: 5333S0003 Lab Sample ID: 15583S0002 Smp Qty.: 409.74 Units: g Geometry: 250LM Detector ID: DET08 Live Time(s): 7,200 SOP (Rev. #): CP1 (21)

Count Date: 12/7/2018 Receipt Date: 12/3/2018 Collection Date: 11/27/2018 SDG: 201215583-1 Energy Qualifier Duplicate Meas./Known Signature Energy Error Activity Ratio Analyte (keV) Result TPU (2s) MDC Units (keV) Ratio Am-241 59.54 -0.011 0.027 0.072 pCi/g U N/A N/A Bi-212 727.33 1.01 0.23 0.41 pCi/g 726.82 N/A N/A Bi-214 609.32 0.707 0.062 0.057 pCi/g 608.97 N/A N/A Co-57 122.06 -0.0024 0.0094 0.0230 pCi/g U N/A N/A Co-60 1332.49 -0.005 0.022 0.042 pCi/g U N/A N/A Cs-134 795.86 -0.022 0.018 0.058 pCi/g U N/A N/A Cs-137 661.66 0.139 0.020 0.034 pCi/g 661.26 N/A N/A Eu-152 344.28 0.001 0.047 0.105 pCi/g U N/A N/A Eu-154 723.30 -0.091 0.084 0.223 pCi/g U N/A N/A Eu-155 105.31 0.057 0.043 0.100 pCi/g 105.11 U N/A N/A K-40 1460.82 18.2 1.1 0.6 pCi/g 1459.89 N/A N/A Mn-54 834.85 0.003 0.019 0.044 pCi/g U N/A N/A Th-228 by Pb-212 238.63 0.991 0.050 0.053 pCi/g 238.53 N/A N/A Ra-226 by Pb-214 351.93 0.855 0.052 0.055 pCi/g 351.70 N/A N/A Ra-226 186.21 1.89 0.24 0.39 pCi/g 185.87 N/A N/A Se-75 264.66 -0.006 0.018 0.041 pCi/g U N/A N/A U-238 by Th-234 63.29 0.82 0.28 0.47 pCi/g 63.21 N/A N/A U-235 143.76 0.064 0.078 0.197 pCi/g U N/A N/A Zn-65 1115.54 -0.178 0.059 0.141 pCi/g U N/A N/A Qualifier Flags:

U = Analyte not detected (< MDC)

TPU = Total Propagated Uncertainty MDC = Minimum Detectable Concentration FCS Non-Impacted Land Areas B-3 5333-SR-01-0

Gamma Spectrometry Summary Sheet Report Date: January 07, 2019 Project # : 201215583 COC # : 1812-001 Project Name: Ft Calhoun Batch Number: GS0866 Analyst: iveyw Client Sample ID: 5333S0004 Lab Sample ID: 15583S0003 Smp Qty.: 489.00 Units: g Geometry: 250LM Detector ID: DET10 Live Time(s): 7,200 SOP (Rev. #): CP1 (21)

Count Date: 12/7/2018 Receipt Date: 12/3/2018 Collection Date: 11/27/2018 SDG: 201215583-1 Energy Qualifier Duplicate Meas./Known Signature Energy Error Activity Ratio Analyte (keV) Result TPU (2s) MDC Units (keV) Ratio Am-241 59.54 -0.091 0.064 0.170 pCi/g U N/A N/A Bi-212 727.33 1.19 0.24 0.39 pCi/g 727.12 N/A N/A Bi-214 609.32 0.662 0.068 0.065 pCi/g 609.25 N/A N/A Co-57 122.06 0.006 0.013 0.031 pCi/g U N/A N/A Co-60 1332.49 0.010 0.020 0.044 pCi/g U N/A N/A Cs-134 795.86 -0.032 0.015 0.054 pCi/g U N/A N/A Cs-137 661.66 0.224 0.028 0.031 pCi/g 661.48 N/A N/A Eu-152 344.28 -0.009 0.045 0.104 pCi/g U N/A N/A Eu-154 723.30 -0.284 0.095 0.175 pCi/g U N/A N/A Eu-155 105.31 0.046 0.039 0.090 pCi/g 105.39 U N/A N/A K-40 1460.82 16.0 1.2 0.7 pCi/g 1460.40 N/A N/A Mn-54 834.85 0.006 0.012 0.029 pCi/g 835.34 U N/A N/A Th-228 by Pb-212 238.63 0.865 0.063 0.060 pCi/g 238.55 N/A N/A Ra-226 by Pb-214 351.93 0.743 0.064 0.069 pCi/g 351.84 N/A N/A Ra-226 186.21 1.67 0.29 0.54 pCi/g 185.84 N/A N/A Se-75 264.66 0.009 0.021 0.050 pCi/g U N/A N/A U-238 by Th-234 63.29 1.10 0.51 1.01 pCi/g 63.31 N/A N/A U-235 143.76 0.08 0.12 0.28 pCi/g U N/A N/A Zn-65 1115.54 -0.187 0.065 0.101 pCi/g U N/A N/A Qualifier Flags:

U = Analyte not detected (< MDC)

TPU = Total Propagated Uncertainty MDC = Minimum Detectable Concentration FCS Non-Impacted Land Areas B-4 5333-SR-01-0

Gamma Spectrometry Summary Sheet Report Date: January 07, 2019 Project # : 201215583 COC # : 1812-001 Project Name: Ft Calhoun Batch Number: GS0866 Analyst: iveyw Client Sample ID: 5333S0007 Lab Sample ID: 15583S0004 Smp Qty.: 511.39 Units: g Geometry: 250FM Detector ID: DET07 Live Time(s): 7,200 SOP (Rev. #): CP1 (21)

Count Date: 12/7/2018 Receipt Date: 12/3/2018 Collection Date: 11/28/2018 SDG: 201215583-1 Energy Qualifier Duplicate Meas./Known Signature Energy Error Activity Ratio Analyte (keV) Result TPU (2s) MDC Units (keV) Ratio Am-241 59.54 0.007 0.021 0.067 pCi/g U N/A N/A Bi-212 727.33 0.62 0.21 0.39 pCi/g 727.29 N/A N/A Bi-214 609.32 0.440 0.055 0.059 pCi/g 609.14 N/A N/A Co-57 122.06 0.0014 0.0099 0.0233 pCi/g U N/A N/A Co-60 1332.49 -0.014 0.025 0.049 pCi/g U N/A N/A Cs-134 795.86 -0.013 0.015 0.052 pCi/g U N/A N/A Cs-137 661.66 0.018 0.020 0.046 pCi/g U N/A N/A Eu-152 344.28 -0.035 0.043 0.091 pCi/g U N/A N/A Eu-154 723.30 -0.185 0.089 0.194 pCi/g U N/A N/A Eu-155 105.31 0.034 0.028 0.064 pCi/g 105.67 U N/A N/A K-40 1460.82 13.5 1.2 0.4 pCi/g 1460.50 N/A N/A Mn-54 834.85 -0.012 0.020 0.041 pCi/g U N/A N/A Th-228 by Pb-212 238.63 0.517 0.044 0.049 pCi/g 238.52 N/A N/A Ra-226 by Pb-214 351.93 0.509 0.051 0.054 pCi/g 351.89 N/A N/A Ra-226 186.21 1.19 0.23 0.42 pCi/g 185.68 N/A N/A Se-75 264.66 -0.0053 0.0074 0.0390 pCi/g U N/A N/A U-238 by Th-234 63.29 0.65 0.24 0.61 pCi/g 63.17 N/A N/A U-235 143.76 0.160 0.080 0.196 pCi/g U N/A N/A Zn-65 1115.54 -0.115 0.055 0.111 pCi/g U N/A N/A Qualifier Flags:

U = Analyte not detected (< MDC)

TPU = Total Propagated Uncertainty MDC = Minimum Detectable Concentration FCS Non-Impacted Land Areas B-5 5333-SR-01-0

Gamma Spectrometry Summary Sheet Report Date: January 07, 2019 Project # : 201215583 COC # : 1812-001 Project Name: Ft Calhoun Batch Number: GS0866 Analyst: iveyw Client Sample ID: 5333S0008 Lab Sample ID: 15583S0005 Smp Qty.: 469.09 Units: g Geometry: 250LM Detector ID: DET08 Live Time(s): 7,200 SOP (Rev. #): CP1 (21)

Count Date: 12/7/2018 Receipt Date: 12/3/2018 Collection Date: 11/28/2018 SDG: 201215583-1 Energy Qualifier Duplicate Meas./Known Signature Energy Error Activity Ratio Analyte (keV) Result TPU (2s) MDC Units (keV) Ratio Am-241 59.54 -0.016 0.024 0.062 pCi/g U N/A N/A Bi-212 727.33 0.97 0.21 0.37 pCi/g 726.88 N/A N/A Bi-214 609.32 0.644 0.057 0.057 pCi/g 608.92 N/A N/A Co-57 122.06 0.0015 0.0084 0.0210 pCi/g U N/A N/A Co-60 1332.49 -0.013 0.022 0.040 pCi/g U N/A N/A Cs-134 795.86 -0.032 0.015 0.047 pCi/g U N/A N/A Cs-137 661.66 0.085 0.015 0.029 pCi/g 661.28 N/A N/A Eu-152 344.28 -0.032 0.038 0.088 pCi/g U N/A N/A Eu-154 723.30 -0.155 0.066 0.174 pCi/g U N/A N/A Eu-155 105.31 0.049 0.031 0.071 pCi/g 105.16 U N/A N/A K-40 1460.82 15.97 0.93 0.50 pCi/g 1459.91 N/A N/A Mn-54 834.85 0.001 0.019 0.039 pCi/g U N/A N/A Th-228 by Pb-212 238.63 0.857 0.043 0.046 pCi/g 238.50 N/A N/A Ra-226 by Pb-214 351.93 0.776 0.047 0.051 pCi/g 351.73 N/A N/A Ra-226 186.21 1.61 0.21 0.35 pCi/g 185.89 N/A N/A Se-75 264.66 -0.001 0.016 0.037 pCi/g U N/A N/A U-238 by Th-234 63.29 0.80 0.28 0.49 pCi/g 63.45 N/A N/A U-235 143.76 0.049 0.048 0.112 pCi/g 143.62 U N/A N/A Zn-65 1115.54 -0.148 0.053 0.127 pCi/g U N/A N/A Qualifier Flags:

U = Analyte not detected (< MDC)

TPU = Total Propagated Uncertainty MDC = Minimum Detectable Concentration FCS Non-Impacted Land Areas B-6 5333-SR-01-0

Gamma Spectrometry Summary Sheet Report Date: January 07, 2019 Project # : 201215583 COC # : 1812-001 Project Name: Ft Calhoun Batch Number: GS0866 Analyst: iveyw Client Sample ID: 5333S0011 Lab Sample ID: 15583S0006 Smp Qty.: 482.86 Units: g Geometry: 250LM Detector ID: DET10 Live Time(s): 7,200 SOP (Rev. #): CP1 (21)

Count Date: 12/7/2018 Receipt Date: 12/3/2018 Collection Date: 11/28/2018 SDG: 201215583-1 Energy Qualifier Duplicate Meas./Known Signature Energy Error Activity Ratio Analyte (keV) Result TPU (2s) MDC Units (keV) Ratio Am-241 59.54 -0.049 0.068 0.164 pCi/g U N/A N/A Bi-212 727.33 0.77 0.20 0.34 pCi/g 727.06 N/A N/A Bi-214 609.32 0.552 0.061 0.062 pCi/g 609.22 N/A N/A Co-57 122.06 0.006 0.012 0.031 pCi/g U N/A N/A Co-60 1332.49 -0.011 0.019 0.037 pCi/g U N/A N/A Cs-134 795.86 0.016 0.022 0.049 pCi/g U N/A N/A Cs-137 661.66 0.116 0.019 0.030 pCi/g 661.53 N/A N/A Eu-152 344.28 0.021 0.042 0.101 pCi/g U N/A N/A Eu-154 723.30 -0.187 0.078 0.166 pCi/g U N/A N/A Eu-155 105.31 0.026 0.052 0.129 pCi/g U N/A N/A K-40 1460.82 15.1 1.2 0.7 pCi/g 1460.42 N/A N/A Mn-54 834.85 0.0092 0.0084 0.0293 pCi/g 836.08 U N/A N/A Th-228 by Pb-212 238.63 0.698 0.053 0.056 pCi/g 238.55 N/A N/A Ra-226 by Pb-214 351.93 0.636 0.058 0.066 pCi/g 351.87 N/A N/A Ra-226 186.21 1.39 0.27 0.51 pCi/g 185.90 N/A N/A Se-75 264.66 -0.007 0.011 0.049 pCi/g U N/A N/A U-238 by Th-234 63.29 0.68 0.44 0.96 pCi/g 63.49 U N/A N/A U-235 143.76 0.09 0.11 0.27 pCi/g U N/A N/A Zn-65 1115.54 -0.187 0.064 0.093 pCi/g U N/A N/A Qualifier Flags:

U = Analyte not detected (< MDC)

TPU = Total Propagated Uncertainty MDC = Minimum Detectable Concentration FCS Non-Impacted Land Areas B-7 5333-SR-01-0

Gamma Spectrometry Summary Sheet Report Date: January 07, 2019 Project # : 201215583 COC # : 1812-001 Project Name: Ft Calhoun Batch Number: GS0866 Analyst: iveyw Client Sample ID: 5333S0013 Lab Sample ID: 15583S0007 Smp Qty.: 515.76 Units: g Geometry: 250FM Detector ID: DET07 Live Time(s): 7,200 SOP (Rev. #): CP1 (21)

Count Date: 12/10/2018 Receipt Date: 12/3/2018 Collection Date: 11/28/2018 SDG: 201215583-1 Energy Qualifier Duplicate Meas./Known Signature Energy Error Activity Ratio Analyte (keV) Result TPU (2s) MDC Units (keV) Ratio Am-241 59.54 -0.046 0.029 0.069 pCi/g U N/A N/A Bi-212 727.33 0.54 0.20 0.38 pCi/g 727.20 N/A N/A Bi-214 609.32 0.615 0.067 0.057 pCi/g 609.12 N/A N/A Co-57 122.06 0.006 0.011 0.025 pCi/g U N/A N/A Co-60 1332.49 0.013 0.021 0.048 pCi/g U N/A N/A Cs-134 795.86 -0.009 0.015 0.057 pCi/g U N/A N/A Cs-137 661.66 -0.005 0.020 0.043 pCi/g U N/A N/A Eu-152 344.28 -0.030 0.046 0.099 pCi/g U N/A N/A Eu-154 723.30 -0.200 0.084 0.184 pCi/g U N/A N/A Eu-155 105.31 -0.004 0.035 0.087 pCi/g U N/A N/A K-40 1460.82 14.4 1.2 0.4 pCi/g 1460.49 N/A N/A Mn-54 834.85 0.003 0.014 0.045 pCi/g U N/A N/A Th-228 by Pb-212 238.63 0.645 0.051 0.053 pCi/g 238.50 N/A N/A Ra-226 by Pb-214 351.93 0.681 0.059 0.049 pCi/g 351.86 N/A N/A Ra-226 186.21 1.35 0.24 0.44 pCi/g 185.92 N/A N/A Se-75 264.66 0.002 0.018 0.041 pCi/g U N/A N/A U-238 by Th-234 63.29 0.79 0.30 0.53 pCi/g 63.10 N/A N/A U-235 143.76 0.099 0.058 0.131 pCi/g 143.69 U N/A N/A Zn-65 1115.54 -0.091 0.054 0.112 pCi/g U N/A N/A Qualifier Flags:

U = Analyte not detected (< MDC)

TPU = Total Propagated Uncertainty MDC = Minimum Detectable Concentration FCS Non-Impacted Land Areas B-8 5333-SR-01-0

Gamma Spectrometry Summary Sheet Report Date: January 07, 2019 Project # : 201215583 COC # : 1812-001 Project Name: Ft Calhoun Batch Number: GS0866 Analyst: iveyw Client Sample ID: 5333S0016 Lab Sample ID: 15583S0008 Smp Qty.: 455.51 Units: g Geometry: 250LM Detector ID: DET08 Live Time(s): 7,200 SOP (Rev. #): CP1 (21)

Count Date: 12/10/2018 Receipt Date: 12/3/2018 Collection Date: 11/28/2018 SDG: 201215583-1 Energy Qualifier Duplicate Meas./Known Signature Energy Error Activity Ratio Analyte (keV) Result TPU (2s) MDC Units (keV) Ratio Am-241 59.54 0.002 0.023 0.070 pCi/g U N/A N/A Bi-212 727.33 1.23 0.23 0.38 pCi/g 726.82 N/A N/A Bi-214 609.32 0.852 0.068 0.060 pCi/g 608.91 N/A N/A Co-57 122.06 -0.0079 0.0093 0.0225 pCi/g U N/A N/A Co-60 1332.49 0.002 0.021 0.041 pCi/g U N/A N/A Cs-134 795.86 -0.019 0.013 0.052 pCi/g U N/A N/A Cs-137 661.66 0.148 0.019 0.029 pCi/g 661.27 N/A N/A Eu-152 344.28 -0.048 0.045 0.095 pCi/g U N/A N/A Eu-154 723.30 -0.181 0.078 0.203 pCi/g U N/A N/A Eu-155 105.31 0.057 0.025 0.081 pCi/g 105.42 U N/A N/A K-40 1460.82 17.14 0.99 0.50 pCi/g 1459.87 N/A N/A Mn-54 834.85 0.0145 0.0085 0.0302 pCi/g 835.12 U N/A N/A Th-228 by Pb-212 238.63 1.059 0.050 0.051 pCi/g 238.52 N/A N/A Ra-226 by Pb-214 351.93 0.943 0.053 0.056 pCi/g 351.74 N/A N/A Ra-226 186.21 1.77 0.23 0.39 pCi/g 185.89 N/A N/A Se-75 264.66 0.012 0.017 0.042 pCi/g U N/A N/A U-238 by Th-234 63.29 0.83 0.27 0.45 pCi/g 63.31 N/A N/A U-235 143.76 0.030 0.076 0.189 pCi/g U N/A N/A Zn-65 1115.54 -0.169 0.060 0.146 pCi/g U N/A N/A Qualifier Flags:

U = Analyte not detected (< MDC)

TPU = Total Propagated Uncertainty MDC = Minimum Detectable Concentration FCS Non-Impacted Land Areas B-9 5333-SR-01-0

Gamma Spectrometry Summary Sheet Report Date: January 07, 2019 Project # : 201215583 COC # : 1812-001 Project Name: Ft Calhoun Batch Number: GS0866 Analyst: iveyw Client Sample ID: 5333S0017 Lab Sample ID: 15583S0009 Smp Qty.: 505.36 Units: g Geometry: 250FM Detector ID: DET10 Live Time(s): 7,200 SOP (Rev. #): CP1 (21)

Count Date: 12/10/2018 Receipt Date: 12/3/2018 Collection Date: 11/29/2018 SDG: 201215583-1 Energy Qualifier Duplicate Meas./Known Signature Energy Error Activity Ratio Analyte (keV) Result TPU (2s) MDC Units (keV) Ratio Am-241 59.54 -0.049 0.066 0.159 pCi/g U N/A N/A Bi-212 727.33 1.02 0.24 0.41 pCi/g 727.23 N/A N/A Bi-214 609.32 0.694 0.076 0.067 pCi/g 609.19 N/A N/A Co-57 122.06 -0.002 0.013 0.031 pCi/g U N/A N/A Co-60 1332.49 -0.000 0.020 0.042 pCi/g U N/A N/A Cs-134 795.86 0.025 0.022 0.051 pCi/g U N/A N/A Cs-137 661.66 0.0253 0.0098 0.0279 pCi/g 661.61 U N/A N/A Eu-152 344.28 0.013 0.045 0.107 pCi/g U N/A N/A Eu-154 723.30 -0.233 0.090 0.180 pCi/g U N/A N/A Eu-155 105.31 0.048 0.038 0.087 pCi/g 105.67 U N/A N/A K-40 1460.82 15.0 1.2 0.6 pCi/g 1460.46 N/A N/A Mn-54 834.85 0.011 0.013 0.030 pCi/g 835.40 U N/A N/A Th-228 by Pb-212 238.63 0.824 0.060 0.056 pCi/g 238.54 N/A N/A Ra-226 by Pb-214 351.93 0.789 0.067 0.067 pCi/g 351.78 N/A N/A Ra-226 186.21 1.55 0.30 0.58 pCi/g 185.92 N/A N/A Se-75 264.66 0.000 0.021 0.049 pCi/g U N/A N/A U-238 by Th-234 63.29 0.56 0.45 1.01 pCi/g 63.65 U N/A N/A U-235 143.76 0.02 0.12 0.27 pCi/g U N/A N/A Zn-65 1115.54 -0.174 0.065 0.098 pCi/g U N/A N/A Qualifier Flags:

U = Analyte not detected (< MDC)

TPU = Total Propagated Uncertainty MDC = Minimum Detectable Concentration FCS Non-Impacted Land Areas B-10 5333-SR-01-0

Gamma Spectrometry Summary Sheet Report Date: January 07, 2019 Project # : 201215583 COC # : 1812-001 Project Name: Ft Calhoun Batch Number: GS0866 Analyst: iveyw Client Sample ID: 5333S0018 Lab Sample ID: 15583S0010 Smp Qty.: 501.54 Units: g Geometry: 250FM Detector ID: DET07 Live Time(s): 7,200 SOP (Rev. #): CP1 (21)

Count Date: 12/10/2018 Receipt Date: 12/3/2018 Collection Date: 11/28/2018 SDG: 201215583-1 Energy Qualifier Duplicate Meas./Known Signature Energy Error Activity Ratio Analyte (keV) Result TPU (2s) MDC Units (keV) Ratio Am-241 59.54 -0.026 0.029 0.069 pCi/g U N/A N/A Bi-212 727.33 0.67 0.23 0.43 pCi/g 727.11 N/A N/A Bi-214 609.32 0.536 0.062 0.060 pCi/g 609.12 N/A N/A Co-57 122.06 0.001 0.010 0.024 pCi/g U N/A N/A Co-60 1332.49 -0.003 0.021 0.044 pCi/g U N/A N/A Cs-134 795.86 0.038 0.022 0.054 pCi/g U N/A N/A Cs-137 661.66 0.0139 0.0091 0.0302 pCi/g 661.33 U N/A N/A Eu-152 344.28 -0.003 0.045 0.100 pCi/g U N/A N/A Eu-154 723.30 -0.162 0.091 0.202 pCi/g U N/A N/A Eu-155 105.31 0.006 0.019 0.078 pCi/g 105.42 U N/A N/A K-40 1460.82 13.5 1.2 0.5 pCi/g 1460.50 N/A N/A Mn-54 834.85 -0.008 0.019 0.041 pCi/g U N/A N/A Th-228 by Pb-212 238.63 0.598 0.049 0.050 pCi/g 238.50 N/A N/A Ra-226 by Pb-214 351.93 0.621 0.057 0.051 pCi/g 351.83 N/A N/A Ra-226 186.21 1.39 0.24 0.43 pCi/g 185.91 N/A N/A Se-75 264.66 -0.003 0.017 0.040 pCi/g U N/A N/A U-238 by Th-234 63.29 0.50 0.24 0.47 pCi/g 63.00 N/A N/A U-235 143.76 0.079 0.050 0.112 pCi/g 144.42 U N/A N/A Zn-65 1115.54 -0.207 0.077 0.122 pCi/g U N/A N/A Qualifier Flags:

U = Analyte not detected (< MDC)

TPU = Total Propagated Uncertainty MDC = Minimum Detectable Concentration FCS Non-Impacted Land Areas B-11 5333-SR-01-0

Gamma Spectrometry Summary Sheet Report Date: January 07, 2019 Project # : 201215583 COC # : 1812-001 Project Name: Ft Calhoun Batch Number: GS0866 Analyst: iveyw Client Sample ID: 5333S0023 Lab Sample ID: 15583S0011 Smp Qty.: 895.64 Units: g Geometry: FM Detector ID: DET07 Live Time(s): 3,600 SOP (Rev. #): CP1 (21)

Count Date: 12/10/2018 Receipt Date: 12/3/2018 Collection Date: 11/29/2018 SDG: 201215583-1 Energy Qualifier Duplicate Meas./Known Signature Energy Error Activity Ratio Analyte (keV) Result TPU (2s) MDC Units (keV) Ratio Am-241 59.54 -0.062 0.040 0.094 pCi/g U N/A N/A Bi-212 727.33 0.72 0.24 0.42 pCi/g 727.37 N/A N/A Bi-214 609.32 0.550 0.065 0.056 pCi/g 609.07 N/A N/A Co-57 122.06 -0.008 0.012 0.028 pCi/g U N/A N/A Co-60 1332.49 0.002 0.022 0.048 pCi/g U N/A N/A Cs-134 795.86 0.019 0.027 0.059 pCi/g U N/A N/A Cs-137 661.66 0.022 0.019 0.042 pCi/g 662.77 U N/A N/A Eu-152 344.28 -0.020 0.051 0.111 pCi/g U N/A N/A Eu-154 723.30 -0.157 0.100 0.228 pCi/g U N/A N/A Eu-155 105.31 0.042 0.029 0.065 pCi/g 105.00 U N/A N/A K-40 1460.82 15.1 1.3 0.5 pCi/g 1460.46 N/A N/A Mn-54 834.85 -0.013 0.022 0.045 pCi/g U N/A N/A Th-228 by Pb-212 238.63 0.597 0.052 0.055 pCi/g 238.49 N/A N/A Ra-226 by Pb-214 351.93 0.556 0.058 0.055 pCi/g 351.79 N/A N/A Ra-226 186.21 1.23 0.26 0.48 pCi/g 185.91 N/A N/A Se-75 264.66 -0.020 0.015 0.042 pCi/g U N/A N/A U-238 by Th-234 63.29 0.60 0.31 0.63 pCi/g 63.20 U N/A N/A U-235 143.76 0.047 0.055 0.129 pCi/g 144.01 U N/A N/A Zn-65 1115.54 -0.094 0.062 0.133 pCi/g U N/A N/A Qualifier Flags:

U = Analyte not detected (< MDC)

TPU = Total Propagated Uncertainty MDC = Minimum Detectable Concentration FCS Non-Impacted Land Areas B-12 5333-SR-01-0

Gamma Spectrometry Summary Sheet Report Date: January 07, 2019 Project # : 201215583 COC # : 1812-001 Project Name: Ft Calhoun Batch Number: GS0866 Analyst: iveyw Client Sample ID: 5333S0001 Lab Sample ID: 15583S0012 Smp Qty.: 373.90 Units: g Geometry: 250LM Detector ID: DET08 Live Time(s): 7,200 SOP (Rev. #): CP1 (21)

Count Date: 12/10/2018 Receipt Date: 12/3/2018 Collection Date: 11/27/2018 SDG: 201215583-1 Energy Qualifier Duplicate Meas./Known Signature Energy Error Activity Ratio Analyte (keV) Result TPU (2s) MDC Units (keV) Ratio Am-241 59.54 -0.016 0.028 0.073 pCi/g U N/A N/A Bi-212 727.33 1.01 0.25 0.47 pCi/g 726.90 N/A N/A Bi-214 609.32 0.738 0.065 0.059 pCi/g 608.98 N/A N/A Co-57 122.06 -0.0052 0.0098 0.0240 pCi/g U N/A N/A Co-60 1332.49 0.009 0.023 0.047 pCi/g U N/A N/A Cs-134 795.86 -0.023 0.017 0.057 pCi/g U N/A N/A Cs-137 661.66 0.171 0.024 0.034 pCi/g 661.21 N/A N/A Eu-152 344.28 -0.033 0.050 0.108 pCi/g U N/A N/A Eu-154 723.30 -0.173 0.082 0.220 pCi/g U N/A N/A Eu-155 105.31 0.037 0.028 0.064 pCi/g 105.28 U N/A N/A K-40 1460.82 17.4 1.0 0.6 pCi/g 1459.90 N/A N/A Mn-54 834.85 0.021 0.015 0.033 pCi/g 835.31 U N/A N/A Th-228 by Pb-212 238.63 1.024 0.052 0.056 pCi/g 238.52 N/A N/A Ra-226 by Pb-214 351.93 0.818 0.055 0.063 pCi/g 351.74 N/A N/A Ra-226 186.21 1.73 0.24 0.40 pCi/g 185.87 N/A N/A Se-75 264.66 0.008 0.019 0.046 pCi/g U N/A N/A U-238 by Th-234 63.29 0.72 0.27 0.49 pCi/g 63.20 N/A N/A U-235 143.76 0.122 0.057 0.126 pCi/g 143.50 U N/A N/A Zn-65 1115.54 -0.145 0.060 0.148 pCi/g U N/A N/A Qualifier Flags:

U = Analyte not detected (< MDC)

TPU = Total Propagated Uncertainty MDC = Minimum Detectable Concentration FCS Non-Impacted Land Areas B-13 5333-SR-01-0

Gamma Spectrometry Summary Sheet Report Date: January 07, 2019 Project # : 201215583 COC # : 1812-001 Project Name: Ft Calhoun Batch Number: GS0866 Analyst: iveyw Client Sample ID: 5333S0005 Lab Sample ID: 15583S0013 Smp Qty.: 766.48 Units: g Geometry: LM Detector ID: DET08 Live Time(s): 3,600 SOP (Rev. #): CP1 (21)

Count Date: 12/10/2018 Receipt Date: 12/3/2018 Collection Date: 11/27/2018 SDG: 201215583-1 Energy Qualifier Duplicate Meas./Known Signature Energy Error Activity Ratio Analyte (keV) Result TPU (2s) MDC Units (keV) Ratio Am-241 59.54 0.009 0.033 0.088 pCi/g U N/A N/A Bi-212 727.33 1.03 0.25 0.43 pCi/g 726.89 N/A N/A Bi-214 609.32 0.783 0.075 0.056 pCi/g 608.90 N/A N/A Co-57 122.06 -0.0047 0.0096 0.0236 pCi/g U N/A N/A Co-60 1332.49 -0.002 0.021 0.042 pCi/g U N/A N/A Cs-134 795.86 -0.019 0.015 0.054 pCi/g U N/A N/A Cs-137 661.66 0.109 0.020 0.030 pCi/g 661.31 N/A N/A Eu-152 344.28 -0.035 0.046 0.097 pCi/g U N/A N/A Eu-154 723.30 -0.207 0.085 0.207 pCi/g U N/A N/A Eu-155 105.31 0.052 0.030 0.068 pCi/g 105.81 U N/A N/A K-40 1460.82 16.4 1.3 0.5 pCi/g 1459.83 N/A N/A Mn-54 834.85 0.0198 0.0098 0.0318 pCi/g 834.97 U N/A N/A Th-228 by Pb-212 238.63 0.939 0.065 0.055 pCi/g 238.53 N/A N/A Ra-226 by Pb-214 351.93 0.899 0.069 0.055 pCi/g 351.75 N/A N/A Ra-226 186.21 1.83 0.29 0.60 pCi/g 185.87 N/A N/A Se-75 264.66 -0.011 0.018 0.042 pCi/g U N/A N/A U-238 by Th-234 63.29 1.07 0.34 0.53 pCi/g 63.31 N/A N/A U-235 143.76 0.100 0.081 0.208 pCi/g U N/A N/A Zn-65 1115.54 -0.054 0.047 0.150 pCi/g U N/A N/A Qualifier Flags:

U = Analyte not detected (< MDC)

TPU = Total Propagated Uncertainty MDC = Minimum Detectable Concentration FCS Non-Impacted Land Areas B-14 5333-SR-01-0

Gamma Spectrometry Summary Sheet Report Date: January 07, 2019 Project # : 201215583 COC # : 1812-001 Project Name: Ft Calhoun Batch Number: GS0866 Analyst: iveyw Client Sample ID: 5333S0006 Lab Sample ID: 15583S0014 Smp Qty.: 409.62 Units: g Geometry: 250LM Detector ID: DET10 Live Time(s): 7,200 SOP (Rev. #): CP1 (21)

Count Date: 12/10/2018 Receipt Date: 12/3/2018 Collection Date: 11/27/2018 SDG: 201215583-1 Energy Qualifier Duplicate Meas./Known Signature Energy Error Activity Ratio Analyte (keV) Result TPU (2s) MDC Units (keV) Ratio Am-241 59.54 -0.040 0.085 0.207 pCi/g U N/A N/A Bi-212 727.33 1.02 0.26 0.46 pCi/g 727.04 N/A N/A Bi-214 609.32 0.807 0.084 0.085 pCi/g 609.21 N/A N/A Co-57 122.06 -0.001 0.015 0.037 pCi/g U N/A N/A Co-60 1332.49 0.012 0.025 0.055 pCi/g U N/A N/A Cs-134 795.86 -0.022 0.018 0.064 pCi/g U N/A N/A Cs-137 661.66 0.142 0.010 0.045 pCi/g 661.55 N/A N/A Eu-152 344.28 -0.040 0.052 0.119 pCi/g U N/A N/A Eu-154 723.30 -0.27 0.11 0.21 pCi/g U N/A N/A Eu-155 105.31 0.071 0.065 0.163 pCi/g U N/A N/A K-40 1460.82 17.9 1.4 0.8 pCi/g 1460.41 N/A N/A Mn-54 834.85 -0.001 0.015 0.051 pCi/g U N/A N/A Th-228 by Pb-212 238.63 1.215 0.084 0.068 pCi/g 238.56 N/A N/A Ra-226 by Pb-214 351.93 0.903 0.077 0.082 pCi/g 351.84 N/A N/A Ra-226 186.21 1.84 0.34 0.64 pCi/g 185.89 N/A N/A Se-75 264.66 -0.002 0.026 0.060 pCi/g U N/A N/A U-238 by Th-234 63.29 0.87 0.59 1.30 pCi/g 63.39 U N/A N/A U-235 143.76 0.097 0.094 0.219 pCi/g 143.94 U N/A N/A Zn-65 1115.54 -0.306 0.089 0.119 pCi/g U N/A N/A Qualifier Flags:

U = Analyte not detected (< MDC)

TPU = Total Propagated Uncertainty MDC = Minimum Detectable Concentration FCS Non-Impacted Land Areas B-15 5333-SR-01-0

Gamma Spectrometry Summary Sheet Report Date: January 07, 2019 Project # : 201215583 COC # : 1812-001 Project Name: Ft Calhoun Batch Number: GS0866 Analyst: iveyw Client Sample ID: 5333S0009 Lab Sample ID: 15583S0015 Smp Qty.: 937.47 Units: g Geometry: FM Detector ID: DET10 Live Time(s): 3,600 SOP (Rev. #): CP1 (21)

Count Date: 12/10/2018 Receipt Date: 12/3/2018 Collection Date: 11/27/2018 SDG: 201215583-1 Energy Qualifier Duplicate Meas./Known Signature Energy Error Activity Ratio Analyte (keV) Result TPU (2s) MDC Units (keV) Ratio Am-241 59.54 -0.057 0.075 0.181 pCi/g U N/A N/A Bi-212 727.33 0.53 0.18 0.34 pCi/g 727.01 N/A N/A Bi-214 609.32 0.534 0.060 0.056 pCi/g 609.23 N/A N/A Co-57 122.06 0.005 0.012 0.030 pCi/g U N/A N/A Co-60 1332.49 0.001 0.018 0.038 pCi/g U N/A N/A Cs-134 795.86 0.029 0.019 0.046 pCi/g U N/A N/A Cs-137 661.66 0.052 0.015 0.025 pCi/g 661.48 N/A N/A Eu-152 344.28 -0.025 0.040 0.091 pCi/g U N/A N/A Eu-154 723.30 -0.162 0.076 0.158 pCi/g U N/A N/A Eu-155 105.31 0.022 0.051 0.127 pCi/g U N/A N/A K-40 1460.82 14.2 1.1 0.5 pCi/g 1460.45 N/A N/A Mn-54 834.85 0.006 0.014 0.037 pCi/g U N/A N/A Th-228 by Pb-212 238.63 0.609 0.049 0.051 pCi/g 238.56 N/A N/A Ra-226 by Pb-214 351.93 0.624 0.057 0.057 pCi/g 351.86 N/A N/A Ra-226 186.21 1.31 0.26 0.50 pCi/g 185.99 N/A N/A Se-75 264.66 -0.005 0.019 0.044 pCi/g U N/A N/A U-238 by Th-234 63.29 0.95 0.52 1.06 pCi/g 63.39 U N/A N/A U-235 143.76 0.01 0.11 0.25 pCi/g U N/A N/A Zn-65 1115.54 -0.136 0.059 0.088 pCi/g U N/A N/A Qualifier Flags:

U = Analyte not detected (< MDC)

TPU = Total Propagated Uncertainty MDC = Minimum Detectable Concentration FCS Non-Impacted Land Areas B-16 5333-SR-01-0

Gamma Spectrometry Summary Sheet Report Date: January 07, 2019 Project # : 201215583 COC # : 1812-001 Project Name: Ft Calhoun Batch Number: GS0866 Analyst: iveyw Client Sample ID: 5333S0010 Lab Sample ID: 15583S0016 Smp Qty.: 961.80 Units: g Geometry: FM Detector ID: DET07 Live Time(s): 3,600 SOP (Rev. #): CP1 (21)

Count Date: 12/11/2018 Receipt Date: 12/3/2018 Collection Date: 11/27/2018 SDG: 201215583-1 Energy Qualifier Duplicate Meas./Known Signature Energy Error Activity Ratio Analyte (keV) Result TPU (2s) MDC Units (keV) Ratio Am-241 59.54 -0.036 0.039 0.092 pCi/g U N/A N/A Bi-212 727.33 0.70 0.22 0.39 pCi/g 727.02 N/A N/A Bi-214 609.32 0.624 0.069 0.057 pCi/g 609.22 N/A N/A Co-57 122.06 0.009 0.012 0.028 pCi/g U N/A N/A Co-60 1332.49 0.013 0.023 0.053 pCi/g U N/A N/A Cs-134 795.86 0.029 0.025 0.058 pCi/g U N/A N/A Cs-137 661.66 0.018 0.010 0.031 pCi/g 661.08 U N/A N/A Eu-152 344.28 -0.012 0.044 0.102 pCi/g U N/A N/A Eu-154 723.30 -0.102 0.074 0.211 pCi/g U N/A N/A Eu-155 105.31 0.025 0.027 0.063 pCi/g 105.01 U N/A N/A K-40 1460.82 13.6 1.2 0.5 pCi/g 1460.41 N/A N/A Mn-54 834.85 -0.002 0.017 0.041 pCi/g U N/A N/A Th-228 by Pb-212 238.63 0.647 0.054 0.054 pCi/g 238.47 N/A N/A Ra-226 by Pb-214 351.93 0.577 0.058 0.054 pCi/g 351.80 N/A N/A Ra-226 186.21 1.37 0.25 0.62 pCi/g 185.84 N/A N/A Se-75 264.66 -0.006 0.020 0.046 pCi/g U N/A N/A U-238 by Th-234 63.29 0.87 0.33 0.59 pCi/g 63.16 N/A N/A U-235 143.76 0.033 0.096 0.225 pCi/g U N/A N/A Zn-65 1115.54 -0.076 0.060 0.125 pCi/g U N/A N/A Qualifier Flags:

U = Analyte not detected (< MDC)

TPU = Total Propagated Uncertainty MDC = Minimum Detectable Concentration FCS Non-Impacted Land Areas B-17 5333-SR-01-0

Gamma Spectrometry Summary Sheet Report Date: January 07, 2019 Project # : 201215583 COC # : 1812-001 Project Name: Ft Calhoun Batch Number: GS0866 Analyst: iveyw Client Sample ID: 5333S0012 Lab Sample ID: 15583S0017 Smp Qty.: 946.47 Units: g Geometry: FM Detector ID: DET08 Live Time(s): 3,600 SOP (Rev. #): CP1 (21)

Count Date: 12/11/2018 Receipt Date: 12/3/2018 Collection Date: 11/28/2018 SDG: 201215583-1 Energy Qualifier Duplicate Meas./Known Signature Energy Error Activity Ratio Analyte (keV) Result TPU (2s) MDC Units (keV) Ratio Am-241 59.54 -0.002 0.023 0.062 pCi/g U N/A N/A Bi-212 727.33 0.62 0.18 0.33 pCi/g 726.30 N/A N/A Bi-214 609.32 0.633 0.063 0.046 pCi/g 608.89 N/A N/A Co-57 122.06 -0.0009 0.0086 0.0213 pCi/g U N/A N/A Co-60 1332.49 -0.007 0.020 0.038 pCi/g U N/A N/A Cs-134 795.86 -0.013 0.012 0.045 pCi/g U N/A N/A Cs-137 661.66 0.040 0.011 0.027 pCi/g 661.20 N/A N/A Eu-152 344.28 -0.015 0.040 0.087 pCi/g U N/A N/A Eu-154 723.30 -0.035 0.049 0.165 pCi/g U N/A N/A Eu-155 105.31 0.036 0.024 0.055 pCi/g 104.85 U N/A N/A K-40 1460.82 14.7 1.1 0.4 pCi/g 1459.83 N/A N/A Mn-54 834.85 0.0125 0.0099 0.0222 pCi/g 834.72 U N/A N/A Th-228 by Pb-212 238.63 0.695 0.051 0.046 pCi/g 238.51 N/A N/A Ra-226 by Pb-214 351.93 0.686 0.056 0.049 pCi/g 351.74 N/A N/A Ra-226 186.21 1.26 0.22 0.40 pCi/g 185.74 N/A N/A Se-75 264.66 -0.007 0.016 0.036 pCi/g U N/A N/A U-238 by Th-234 63.29 0.71 0.24 0.39 pCi/g 63.25 N/A N/A U-235 143.76 0.069 0.055 0.127 pCi/g 144.38 U N/A N/A Zn-65 1115.54 -0.045 0.036 0.118 pCi/g U N/A N/A Qualifier Flags:

U = Analyte not detected (< MDC)

TPU = Total Propagated Uncertainty MDC = Minimum Detectable Concentration FCS Non-Impacted Land Areas B-18 5333-SR-01-0

Gamma Spectrometry Summary Sheet Report Date: January 07, 2019 Project # : 201215583 COC # : 1812-001 Project Name: Ft Calhoun Batch Number: GS0866 Analyst: iveyw Client Sample ID: 5333S0014 Lab Sample ID: 15583S0018 Smp Qty.: 942.30 Units: g Geometry: FM Detector ID: DET10 Live Time(s): 3,600 SOP (Rev. #): CP1 (21)

Count Date: 12/11/2018 Receipt Date: 12/3/2018 Collection Date: 11/28/2018 SDG: 201215583-1 Energy Qualifier Duplicate Meas./Known Signature Energy Error Activity Ratio Analyte (keV) Result TPU (2s) MDC Units (keV) Ratio Am-241 59.54 0.011 0.077 0.190 pCi/g U N/A N/A Bi-212 727.33 0.76 0.19 0.31 pCi/g 726.88 N/A N/A Bi-214 609.32 0.635 0.066 0.056 pCi/g 609.24 N/A N/A Co-57 122.06 -0.003 0.012 0.030 pCi/g U N/A N/A Co-60 1332.49 0.000 0.012 0.037 pCi/g U N/A N/A Cs-134 795.86 0.020 0.023 0.051 pCi/g U N/A N/A Cs-137 661.66 0.053 0.015 0.025 pCi/g 661.51 N/A N/A Eu-152 344.28 -0.045 0.040 0.089 pCi/g U N/A N/A Eu-154 723.30 -0.202 0.083 0.157 pCi/g U N/A N/A Eu-155 105.31 0.067 0.053 0.134 pCi/g U N/A N/A K-40 1460.82 13.8 1.1 0.5 pCi/g 1460.44 N/A N/A Mn-54 834.85 0.0165 0.0088 0.0272 pCi/g 835.48 U N/A N/A Th-228 by Pb-212 238.63 0.691 0.054 0.052 pCi/g 238.55 N/A N/A Ra-226 by Pb-214 351.93 0.707 0.062 0.061 pCi/g 351.85 N/A N/A Ra-226 186.21 1.38 0.26 0.47 pCi/g 185.88 N/A N/A Se-75 264.66 -0.015 0.019 0.044 pCi/g U N/A N/A U-238 by Th-234 63.29 0.61 0.49 1.10 pCi/g 63.26 U N/A N/A U-235 143.76 0.06 0.11 0.26 pCi/g U N/A N/A Zn-65 1115.54 -0.116 0.050 0.089 pCi/g U N/A N/A Qualifier Flags:

U = Analyte not detected (< MDC)

TPU = Total Propagated Uncertainty MDC = Minimum Detectable Concentration FCS Non-Impacted Land Areas B-19 5333-SR-01-0

Gamma Spectrometry Summary Sheet Report Date: January 07, 2019 Project # : 201215583 COC # : 1812-001 Project Name: Ft Calhoun Batch Number: GS0866 Analyst: iveyw Client Sample ID: 5333S0015 Lab Sample ID: 15583S0019 Smp Qty.: 944.67 Units: g Geometry: FM Detector ID: DET07 Live Time(s): 3,600 SOP (Rev. #): CP1 (21)

Count Date: 12/12/2018 Receipt Date: 12/3/2018 Collection Date: 11/27/2018 SDG: 201215583-1 Energy Qualifier Duplicate Meas./Known Signature Energy Error Activity Ratio Analyte (keV) Result TPU (2s) MDC Units (keV) Ratio Am-241 59.54 -0.047 0.042 0.099 pCi/g U N/A N/A Bi-212 727.33 0.78 0.25 0.44 pCi/g 727.16 N/A N/A Bi-214 609.32 0.705 0.075 0.062 pCi/g 609.08 N/A N/A Co-57 122.06 -0.010 0.012 0.028 pCi/g U N/A N/A Co-60 1332.49 0.005 0.025 0.055 pCi/g U N/A N/A Cs-134 795.86 -0.013 0.015 0.057 pCi/g U N/A N/A Cs-137 661.66 0.028 0.015 0.032 pCi/g 661.43 U N/A N/A Eu-152 344.28 -0.057 0.052 0.108 pCi/g U N/A N/A Eu-154 723.30 -0.17 0.10 0.23 pCi/g U N/A N/A Eu-155 105.31 0.038 0.029 0.067 pCi/g 104.88 U N/A N/A K-40 1460.82 14.4 1.3 0.4 pCi/g 1460.29 N/A N/A Mn-54 834.85 0.0117 0.0077 0.0287 pCi/g 835.34 U N/A N/A Th-228 by Pb-212 238.63 0.704 0.057 0.055 pCi/g 238.51 N/A N/A Ra-226 by Pb-214 351.93 0.767 0.069 0.054 pCi/g 351.83 N/A N/A Ra-226 186.21 1.42 0.27 0.48 pCi/g 185.88 N/A N/A Se-75 264.66 -0.010 0.020 0.046 pCi/g U N/A N/A U-238 by Th-234 63.29 0.75 0.33 0.63 pCi/g 63.06 N/A N/A U-235 143.76 0.025 0.100 0.235 pCi/g U N/A N/A Zn-65 1115.54 -0.159 0.079 0.139 pCi/g U N/A N/A Qualifier Flags:

U = Analyte not detected (< MDC)

TPU = Total Propagated Uncertainty MDC = Minimum Detectable Concentration FCS Non-Impacted Land Areas B-20 5333-SR-01-0

Gamma Spectrometry Summary Sheet Report Date: January 07, 2019 Project # : 201215583 COC # : 1812-001 Project Name: Ft Calhoun Batch Number: GS0866 Analyst: iveyw Client Sample ID: 5333S0019 Lab Sample ID: 15583S0020 Smp Qty.: 452.10 Units: g Geometry: 250LM Detector ID: DET07 Live Time(s): 7,200 SOP (Rev. #): CP1 (21)

Count Date: 12/11/2018 Receipt Date: 12/3/2018 Collection Date: 11/28/2018 SDG: 201215583-1 Energy Qualifier Duplicate Meas./Known Signature Energy Error Activity Ratio Analyte (keV) Result TPU (2s) MDC Units (keV) Ratio Am-241 59.54 0.005 0.026 0.063 pCi/g 59.31 U N/A N/A Bi-212 727.33 1.17 0.27 0.44 pCi/g 727.14 N/A N/A Bi-214 609.32 0.799 0.080 0.067 pCi/g 609.17 N/A N/A Co-57 122.06 0.000 0.012 0.027 pCi/g U N/A N/A Co-60 1332.49 -0.022 0.026 0.047 pCi/g U N/A N/A Cs-134 795.86 -0.033 0.021 0.064 pCi/g U N/A N/A Cs-137 661.66 0.045 0.016 0.031 pCi/g 661.42 N/A N/A Eu-152 344.28 -0.010 0.052 0.114 pCi/g U N/A N/A Eu-154 723.30 -0.31 0.12 0.24 pCi/g U N/A N/A Eu-155 105.31 0.070 0.034 0.075 pCi/g 105.18 U N/A N/A K-40 1460.82 15.6 1.3 0.5 pCi/g 1460.39 N/A N/A Mn-54 834.85 -0.011 0.025 0.051 pCi/g U N/A N/A Th-228 by Pb-212 238.63 0.861 0.064 0.061 pCi/g 238.50 N/A N/A Ra-226 by Pb-214 351.93 0.855 0.071 0.059 pCi/g 351.83 N/A N/A Ra-226 186.21 1.67 0.27 0.64 pCi/g 185.87 N/A N/A Se-75 264.66 0.006 0.019 0.046 pCi/g U N/A N/A U-238 by Th-234 63.29 1.08 0.37 0.63 pCi/g 63.01 N/A N/A U-235 143.76 0.068 0.065 0.153 pCi/g 143.85 U N/A N/A Zn-65 1115.54 -0.232 0.089 0.134 pCi/g U N/A N/A Qualifier Flags:

U = Analyte not detected (< MDC)

TPU = Total Propagated Uncertainty MDC = Minimum Detectable Concentration FCS Non-Impacted Land Areas B-21 5333-SR-01-0

Gamma Spectrometry Summary Sheet Report Date: January 07, 2019 Project # : 201215583 COC # : 1812-001 Project Name: Ft Calhoun Batch Number: GS0866 Analyst: iveyw Client Sample ID: 5333S0020 Lab Sample ID: 15583S0021 Smp Qty.: 983.00 Units: g Geometry: FM Detector ID: DET07 Live Time(s): 3,600 SOP (Rev. #): CP1 (21)

Count Date: 12/13/2018 Receipt Date: 12/3/2018 Collection Date: 11/27/2018 SDG: 201215583-1 Energy Qualifier Duplicate Meas./Known Signature Energy Error Activity Ratio Analyte (keV) Result TPU (2s) MDC Units (keV) Ratio Am-241 59.54 -0.062 0.040 0.094 pCi/g U N/A N/A Bi-212 727.33 0.80 0.24 0.43 pCi/g 726.83 N/A N/A Bi-214 609.32 0.657 0.071 0.061 pCi/g 609.20 N/A N/A Co-57 122.06 -0.004 0.012 0.029 pCi/g U N/A N/A Co-60 1332.49 -0.023 0.026 0.046 pCi/g U N/A N/A Cs-134 795.86 -0.015 0.016 0.059 pCi/g U N/A N/A Cs-137 661.66 0.043 0.017 0.034 pCi/g 662.02 N/A N/A Eu-152 344.28 0.001 0.050 0.113 pCi/g U N/A N/A Eu-154 723.30 -0.127 0.080 0.216 pCi/g U N/A N/A Eu-155 105.31 0.023 0.041 0.103 pCi/g U N/A N/A K-40 1460.82 14.5 1.3 0.5 pCi/g 1460.46 N/A N/A Mn-54 834.85 -0.017 0.012 0.048 pCi/g U N/A N/A Th-228 by Pb-212 238.63 0.735 0.059 0.055 pCi/g 238.50 N/A N/A Ra-226 by Pb-214 351.93 0.728 0.066 0.055 pCi/g 351.78 N/A N/A Ra-226 186.21 1.23 0.26 0.49 pCi/g 185.81 N/A N/A Se-75 264.66 0.010 0.020 0.048 pCi/g U N/A N/A U-238 by Th-234 63.29 0.60 0.31 0.62 pCi/g 62.84 U N/A N/A U-235 143.76 0.16 0.10 0.24 pCi/g U N/A N/A Zn-65 1115.54 0.029 0.026 0.090 pCi/g 1115.78 U N/A N/A Qualifier Flags:

U = Analyte not detected (< MDC) Page 22 of 27 TPU = Total Propagated Uncertainty MDC = Minimum Detectable Concentration FCS Non-Impacted Land Areas B-22 5333-SR-01-0

Gamma Spectrometry Summary Sheet Report Date: January 07, 2019 Project # : 201215583 COC # : 1812-001 Project Name: Ft Calhoun Batch Number: GS0866 Analyst: iveyw Client Sample ID: 5333S0021 Lab Sample ID: 15583S0022 Smp Qty.: 933.21 Units: g Geometry: FM Detector ID: DET10 Live Time(s): 3,600 SOP (Rev. #): CP1 (21)

Count Date: 12/12/2018 Receipt Date: 12/3/2018 Collection Date: 11/28/2018 SDG: 201215583-1 Energy Qualifier Duplicate Meas./Known Signature Energy Error Activity Ratio Analyte (keV) Result TPU (2s) MDC Units (keV) Ratio Am-241 59.54 -0.110 0.077 0.183 pCi/g U N/A N/A Bi-212 727.33 0.84 0.21 0.36 pCi/g 727.24 N/A N/A Bi-214 609.32 0.680 0.070 0.057 pCi/g 609.19 N/A N/A Co-57 122.06 0.003 0.012 0.030 pCi/g U N/A N/A Co-60 1332.49 -0.014 0.020 0.037 pCi/g U N/A N/A Cs-134 795.86 -0.020 0.013 0.050 pCi/g U N/A N/A Cs-137 661.66 0.016 0.014 0.031 pCi/g 661.82 U N/A N/A Eu-152 344.28 0.000 0.040 0.093 pCi/g U N/A N/A Eu-154 723.30 -0.225 0.087 0.158 pCi/g U N/A N/A Eu-155 105.31 0.010 0.052 0.130 pCi/g U N/A N/A K-40 1460.82 14.6 1.1 0.5 pCi/g 1460.37 N/A N/A Mn-54 834.85 -0.006 0.018 0.039 pCi/g U N/A N/A Th-228 by Pb-212 238.63 0.679 0.053 0.052 pCi/g 238.54 N/A N/A Ra-226 by Pb-214 351.93 0.677 0.060 0.056 pCi/g 351.81 N/A N/A Ra-226 186.21 1.47 0.28 0.52 pCi/g 185.97 N/A N/A Se-75 264.66 0.008 0.020 0.047 pCi/g U N/A N/A U-238 by Th-234 63.29 1.00 0.53 1.07 pCi/g 63.34 U N/A N/A U-235 143.76 0.058 0.062 0.145 pCi/g 144.05 U N/A N/A Zn-65 1115.54 -0.223 0.077 0.092 pCi/g U N/A N/A Qualifier Flags:

U = Analyte not detected (< MDC)

TPU = Total Propagated Uncertainty MDC = Minimum Detectable Concentration FCS Non-Impacted Land Areas B-23 5333-SR-01-0

Gamma Spectrometry Summary Sheet Report Date: January 07, 2019 Project # : 201215583 COC # : 1812-001 Project Name: Ft Calhoun Batch Number: GS0866 Analyst: iveyw Client Sample ID: 5333S0022 Lab Sample ID: 15583S0023 Smp Qty.: 782.51 Units: g Geometry: LM Detector ID: DET07 Live Time(s): 3,600 SOP (Rev. #): CP1 (21)

Count Date: 12/12/2018 Receipt Date: 12/3/2018 Collection Date: 11/28/2018 SDG: 201215583-1 Energy Qualifier Duplicate Meas./Known Signature Energy Error Activity Ratio Analyte (keV) Result TPU (2s) MDC Units (keV) Ratio Am-241 59.54 0.005 0.030 0.111 pCi/g U N/A N/A Bi-212 727.33 0.86 0.27 0.47 pCi/g 727.18 N/A N/A Bi-214 609.32 0.717 0.083 0.078 pCi/g 609.08 N/A N/A Co-57 122.06 0.002 0.014 0.033 pCi/g U N/A N/A Co-60 1332.49 -0.017 0.029 0.055 pCi/g U N/A N/A Cs-134 795.86 -0.013 0.016 0.067 pCi/g U N/A N/A Cs-137 661.66 0.208 0.032 0.039 pCi/g 661.33 N/A N/A Eu-152 344.28 -0.031 0.060 0.129 pCi/g U N/A N/A Eu-154 723.30 -0.24 0.12 0.27 pCi/g U N/A N/A Eu-155 105.31 0.040 0.047 0.119 pCi/g U N/A N/A K-40 1460.82 14.6 1.3 0.5 pCi/g 1460.33 N/A N/A Mn-54 834.85 0.001 0.026 0.058 pCi/g U N/A N/A Th-228 by Pb-212 238.63 0.854 0.069 0.064 pCi/g 238.49 N/A N/A Ra-226 by Pb-214 351.93 0.801 0.076 0.070 pCi/g 351.76 N/A N/A Ra-226 186.21 1.61 0.31 0.57 pCi/g 185.81 N/A N/A Se-75 264.66 0.000 0.023 0.054 pCi/g U N/A N/A U-238 by Th-234 63.29 0.92 0.52 1.11 pCi/g 63.09 U N/A N/A U-235 143.76 0.04 0.11 0.27 pCi/g U N/A N/A Zn-65 1115.54 -0.23 0.10 0.15 pCi/g U N/A N/A Qualifier Flags:

U = Analyte not detected (< MDC)

TPU = Total Propagated Uncertainty MDC = Minimum Detectable Concentration FCS Non-Impacted Land Areas B-24 5333-SR-01-0

Gamma Spectrometry Summary Sheet Report Date: January 07, 2019 Project # : 201215583 COC # : 1812-001 Project Name: Ft Calhoun Batch Number: GS0866 Analyst: iveyw Client Sample ID: 5333S0024 Lab Sample ID: 15583S0024 Smp Qty.: 483.36 Units: g Geometry: 250LM Detector ID: DET08 Live Time(s): 7,200 SOP (Rev. #): CP1 (21)

Count Date: 12/13/2018 Receipt Date: 12/3/2018 Collection Date: 11/28/2018 SDG: 201215583-1 Energy Qualifier Duplicate Meas./Known Signature Energy Error Activity Ratio Analyte (keV) Result TPU (2s) MDC Units (keV) Ratio Am-241 59.54 0.006 0.022 0.059 pCi/g U N/A N/A Bi-212 727.33 0.94 0.20 0.32 pCi/g 727.22 N/A N/A Bi-214 609.32 0.580 0.052 0.051 pCi/g 609.29 N/A N/A Co-57 122.06 0.0029 0.0080 0.0200 pCi/g U N/A N/A Co-60 1332.49 -0.014 0.017 0.031 pCi/g U N/A N/A Cs-134 795.86 0.025 0.020 0.044 pCi/g U N/A N/A Cs-137 661.66 0.372 0.034 0.026 pCi/g 661.63 N/A N/A Eu-152 344.28 -0.050 0.040 0.083 pCi/g U N/A N/A Eu-154 723.30 -0.223 0.082 0.166 pCi/g U N/A N/A Eu-155 105.31 0.042 0.023 0.051 pCi/g 105.67 U N/A N/A K-40 1460.82 13.92 0.82 0.40 pCi/g 1460.70 N/A N/A Mn-54 834.85 -0.006 0.018 0.035 pCi/g U N/A N/A Th-228 by Pb-212 238.63 0.732 0.039 0.045 pCi/g 238.64 N/A N/A Ra-226 by Pb-214 351.93 0.694 0.043 0.044 pCi/g 351.91 N/A N/A Ra-226 186.21 1.02 0.18 0.34 pCi/g 185.98 N/A N/A Se-75 264.66 0.002 0.015 0.036 pCi/g U N/A N/A U-238 by Th-234 63.29 0.57 0.21 0.38 pCi/g 63.23 N/A N/A U-235 143.76 0.065 0.064 0.163 pCi/g U N/A N/A Zn-65 1115.54 -0.136 0.065 0.104 pCi/g U N/A N/A Qualifier Flags:

U = Analyte not detected (< MDC)

TPU = Total Propagated Uncertainty MDC = Minimum Detectable Concentration FCS Non-Impacted Land Areas B-25 5333-SR-01-0

Gamma Spectrometry Summary Sheet Report Date: January 07, 2019 Project # : 201215583 COC # : 1812-001 Project Name: Ft Calhoun Batch Number: GS0866 Analyst: iveyw Client Sample ID: 5333S0025 Lab Sample ID: 15583S0025 Smp Qty.: 990.15 Units: g Geometry: FM Detector ID: DET08 Live Time(s): 3,600 SOP (Rev. #): CP1 (21)

Count Date: 12/12/2018 Receipt Date: 12/3/2018 Collection Date: 11/28/2018 SDG: 201215583-1 Energy Qualifier Duplicate Meas./Known Signature Energy Error Activity Ratio Analyte (keV) Result TPU (2s) MDC Units (keV) Ratio Am-241 59.54 0.017 0.022 0.059 pCi/g U N/A N/A Bi-212 727.33 0.67 0.17 0.28 pCi/g 726.79 N/A N/A Bi-214 609.32 0.470 0.050 0.042 pCi/g 608.95 N/A N/A Co-57 122.06 -0.0000 0.0082 0.0204 pCi/g U N/A N/A Co-60 1332.49 0.005 0.019 0.039 pCi/g U N/A N/A Cs-134 795.86 -0.023 0.014 0.044 pCi/g U N/A N/A Cs-137 661.66 0.0080 0.0053 0.0191 pCi/g 661.34 U N/A N/A Eu-152 344.28 -0.024 0.036 0.079 pCi/g U N/A N/A Eu-154 723.30 -0.072 0.059 0.161 pCi/g U N/A N/A Eu-155 105.31 0.015 0.034 0.085 pCi/g U N/A N/A K-40 1460.82 14.2 1.1 0.4 pCi/g 1459.81 N/A N/A Mn-54 834.85 0.0044 0.0098 0.0236 pCi/g 834.84 U N/A N/A Th-228 by Pb-212 238.63 0.685 0.050 0.042 pCi/g 238.50 N/A N/A Ra-226 by Pb-214 351.93 0.583 0.049 0.046 pCi/g 351.71 N/A N/A Ra-226 186.21 0.89 0.18 0.33 pCi/g 185.94 N/A N/A Se-75 264.66 -0.010 0.015 0.035 pCi/g U N/A N/A U-238 by Th-234 63.29 0.62 0.22 0.37 pCi/g 63.24 N/A N/A U-235 143.76 0.029 0.046 0.108 pCi/g 143.67 U N/A N/A Zn-65 1115.54 -0.080 0.037 0.113 pCi/g U N/A N/A Qualifier Flags:

U = Analyte not detected (< MDC)

TPU = Total Propagated Uncertainty MDC = Minimum Detectable Concentration FCS Non-Impacted Land Areas B-26 5333-SR-01-0

APPENDIX C MAJOR INSTRUMENTATION FCS Non-Impacted Land Areas 5333-SR-01-0

The display of a specific product is not to be construed as an endorsement of the product or its manufacturer by the author or his employer.

C.1 SCANNING AND MEASUREMENT INSTRUMENT/DETECTOR COMBINATIONS C.1.1 GAMMA Ludlum NaI Scintillation Detector Model 44-10, Crystal: 5.1 cm x 5.1 cm (Ludlum Measurements, Inc., Sweetwater, Texas) coupled to:

Ludlum Ratemeter-scaler Model 2221 (Ludlum Measurements, Inc., Sweetwater, Texas) coupled to:

Trimble Data Logger (Trimble Navigation Limited, Sunnyvale, California)

C.2 LABORATORY ANALYTICAL INSTRUMENTATION High-Purity, Extended Range Intrinsic High-Purity, Intrinsic Detector Detector EG&G ORTEC Model No. GMX-30P4 Canberra/Tennelec Model No: ERVDS30- Canberra Lynx Multichannel Analyzer 25195 Canberra Gamma-Apex Software Canberra Lynx Multichannel Analyzer (Canberra, Meriden, Connecticut)

Canberra Gamma-Apex Software Used in conjunction with:

(Canberra, Meriden, Connecticut) Lead Shield Model G-11 Used in conjunction with: (Nuclear Lead, Oak Ridge, Tennessee) and Lead Shield Model G-11 Dell Workstation (Nuclear Lead, Oak Ridge, Tennessee) and (Canberra, Meriden, Connecticut)

Dell Workstation (Canberra, Meriden, Connecticut) High-Purity, Intrinsic Detector EG&G ORTEC Model No. CDG-SV-High-Purity, Intrinsic Detector 76/GEM-MX5970-S EG&G ORTEC Model No. GMX-45200-5 Canberra Lynx Multichannel Analyzer Canberra Lynx Multichannel Analyzer Canberra Gamma-Apex Software Canberra Gamma-Apex Software (Canberra, Meriden, Connecticut)

(Canberra, Meriden, Connecticut) Used in conjunction with:

Used in conjunction with: Lead Shield Model G-11 Lead Shield Model G-11 (Nuclear Lead, Oak Ridge, Tennessee) and (Nuclear Lead, Oak Ridge, Tennessee) and Dell Workstation Dell Workstation (Canberra, Meriden, Connecticut)

(Canberra, Meriden, Connecticut)

FCS Non-Impacted Land Areas C-1 5333-SR-01-0

APPENDIX D SURVEY AND ANALYTICAL PROCEDURES FCS Non-Impacted Land Areas 5333-SR-01-0

D.1 PROJECT HEALTH AND SAFETY ORISE performed all survey activities in accordance with the ORAU Radiation Protection Manual, the ORAU Health and Safety Manual, and the ORAU Radiological and Environmental Survey Procedures Manual (ORAU 2014, ORAU 2016a, and ORAU 2016b). Prior to on-site activities, a work-specific hazard checklist was completed for the project and discussed with field personnel. The planned activities were thoroughly discussed with site personnel prior to implementation to identify hazards present.

Additionally, prior to performing work, a pre-job briefing and walk down of the area were completed with field personnel to identify hazards present and discuss safety concerns. Should ORISE have identified a hazard not covered in the ORAU Radiological and Environmental Survey Procedures Manual (ORAU 2016b) or the projects work-specific hazard checklist for the planned survey and sampling procedures, work would not have been initiated or continued until it was addressed by an appropriate job hazard analysis and hazard controls.

D.2 CALIBRATION AND QUALITY ASSURANCE Calibration of all field instrumentation was based on standards/sources, traceable to National Institute of Standards and Technology (NIST).

Field survey activities were conducted in accordance with procedures from the following ORAU documents:

  • ORAU Radiological and Environmental Survey Procedures Manual (ORAU 2016b)
  • ORAU Radiological and Environmental Analytical Laboratory Procedures Manual (ORAU 2017)

Quality control procedures include:

  • Daily instrument background and check-source measurements to confirm that equipment operation is within acceptable statistical fluctuations.
  • Participation in Mixed-Analyte Performance Evaluation Program and Intercomparison Testing Program Laboratory Quality Assurance Programs.
  • Training and certification of all individuals performing procedures.
  • Periodic internal and external audits.

FCS Non-Impacted Land Areas D-1 5333-SR-01-0

D.3 SURVEY PROCEDURES D.3.1 SURFACE SCANS Scans for elevated gamma radiation were performed by passing the detector slowly over the surface.

The distance between the detector and surface was maintained at a minimum. Specific scan minimum detectable concentration (MDCs) for the sodium iodide (NaI) scintillation detectors were not determined as the instruments were used solely as a qualitative means to identify elevated gamma radiation levels in excess of background. Identifications of elevated radiation levels that could exceed background were determined based on an increase in the audible signal from the indicating instrument.

D. 3.3 SOIL SAMPLING Surface (0 to 15 cm) soil samples were collected using a clean garden trowel and placed into individual containers. Each sample was labeled with pertinent information and maintained under direct custody of ORISE personnel for the duration of the trip. Individual samples and external shipping containers were affixed with security seals prior to shipment.

D.4 RADIOLOGICAL ANALYSIS D.4.1 GAMMA SPECTROSCOPY Samples were dried, mixed, crushed, and homogenized. A portion of the prepared sample was sealed in a 0.25-liter Marinelli beaker. The quantity placed in the beaker was chosen to reproduce the calibrated counting geometry. Net material weights were determined and the samples counted using intrinsic, high purity, germanium detectors coupled to a pulse height analyzer system. Background and Compton stripping, peak search, peak identification, and concentration calculations were performed using the computer capabilities inherent in the analyzer system. All total absorption peaks (TAPs) associated with the reported radionuclides were reviewed for consistency of activity. Spectra were also reviewed for other identifiable TAPs. TAPs used for determining the activities of reported radionuclides and the typical associated MDCs, are shown in Table D.1.

FCS Non-Impacted Land Areas D-2 5333-SR-01-0

Table D.1. Typical MDCs for Reported Radionuclides Radionuclidea TAP (keV) MDC (pCi/g)

Am-241 59.54 0.11 Bi-212 727.17 0.46 Bi-214 609.31 0.08 Co-57 122.06 0.03 Co-60 1332.49 0.06 Cs-134 795.84 0.06 Cs-137 661.65 0.05 Eu-152 344.28 0.10 Eu-154 723.30 0.20 Eu-155 105.31 0.09 Mn-54 834.83 0.05 Ra-226 186.21 0.75 Ra-226 by Pb-214 351.92 0.08 Se-75 264.66 0.04 Th-232 by Ac-228 911.07 0.14 Th-228 by Pb-212 238.63 0.06 U-235 143.76 0.24 U-238 63.29 0.75 Zn-65 1115.54 0.15 aSpectra were also reviewed for other identifiable TAPs.

D.4.2 DETECTION LIMITS Detection limits, referred to as MDCs, were based on 95% confidence level. Because of variations in background levels, measurement efficiencies, and contributions from other radionuclides in samples, the detection limits differ from sample to sample and instrument to instrument.

FCS Non-Impacted Land Areas D-3 5333-SR-01-0

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