ML15344A361

Characterization of the Zion Station Independent Spent Fuel Storage Facility (Isfsi), July 30, 2012

ML15344A361
Person / Time
Site:	Zion  File:ZionSolutions icon.png
Issue date:	07/30/2012
From:	Decker R, Horvath S ZionSolutions
To:	Office of Nuclear Material Safety and Safeguards
Shared Package
ML15344A344	List: ML15344A342 ML15344A355 ML15344A356 ML15344A357 ML15344A358 ML15344A359 ML15344A361 ML15344A362 ML15344A363 ML15344A385 ML15344A386 ML15344A388 ML15344A389 ML15344A390 ML15344A391 ML15344A392 ML15344A393 ML15344A394 ML15344A413 ZS-2013-0082, NPDES Permit for Discharge ZS-2015-0163, September 24, 2014 Email to Terry Sullivan
References
ZS-2015-0163
Download: ML15344A361 (84)

Text

Characterization of the Zion Station Independent Spent Fuel Storage Facility (ISFSI)

July 30, 2012 Prepared By: Signature on File Date 7/30/12 Robert F. Decker LTP Radiological Engineering Manager ZionSolutions, LLC Reviewed By: Signature on File Date 7/30/12 Steve Horvath Characterization/License Termination Manager ZionSolutions, LLC

Introduction As part of the Zion Station Restoration Project (ZSRP) all reactor fuel and greater than Class C (GTCC) waste will be placed into casks and transferred to an Independent Spent Fuel Storage Installation (ISFSI) that is to be constructed at the Zion Station site. It is expected that the fuel will remain in dry storage within the ISFSI until it is transferred to the Department of Energy (DOE). The ISFSI will be constructed in the southwest corner of the Zion Nuclear Station, immediately south of the Switchyard. Figure 1-1 presents the approximate location.

Radiological surveys were conducted of the ISFSI area that is to be impacted by the construction process as part of the ISFSI radiological characterization. The survey design focused primarily on the surface and subsurface soil associated within the region. The characterization survey was designed to meet the general requirements of a final status survey in accordance with NUREG-1575 Rev. 1, the Multi-Agency Radiation Survey and Site Investigation Manual (MARSSIM).

Scope A survey plan was developed for the ISFSI (Attachment 1-1) that included the following survey and assessment attributes:

• Data Quality Objectives

• Radionuclides of Concern

• Survey Area

• Survey Design and Methodology

• Sampling Methodology

• Instrumentation

• Sample Handling and Analysis

• Minimum Detectable Concentrations

• Quality Assurance and Quality Control

• Chain of Custody

• Characterization of Survey Data The survey region comprises an area of 23,118 m2. Within the region are two concrete pads and an asphalt roadway that is located immediately south of the Switchyard. The survey area was initially divided into two separate surveys units (10218A and 10218B). The asphalt roadway and two concrete pads within the two survey units were assigned separate survey unit designations (10218C, 10218D and 10218E). The Historical Site Assessment has classified (in accordance with MARSSIM) the survey units in this survey region as Class 3. There are no reasons to classify the associated survey units otherwise.

The assigned survey unit designations and surface area are provided in Table 1-1.

2

Figure 1-1 ISFSI Survey Area Table 1-1 ISFSI Survey Units Survey Unit Type Area (m2) Class 10218A (ISFSI East) Open Land 11,559.0 3 10218B (ISFSI West) Open Land 11,559.0 3 10218C (Asphalt Roadway) Asphalt Roadway 467.5 3 10218D (Mix Plant Pad) Concrete Pad 131.1 3 10218E Concrete Pad 105.4 3 (Hazardous Waste Storage Pad)

Table 1-2 summarizes the surveys and sampling protocols that were conducted in each survey unit. The table does not include information on duplicate samples or investigations that were performed. This information is included in the sections designated for each separate survey unit. It is important to note 3

that the number of samples and survey measurements collected for each of the ISFSI survey units exceed the requirements for a MARSSIM Class 3 survey where the and decision levels are both set at 0.05.

Table 1-2 ISFSI Surveys Survey Unit Media Scan Direct Surface Subsurface SU Area (m2) Asphalt Concrete Gamma Beta Beta Soil* Soil 10218A 11,559.0 N/A N/A 30 30 50% N/A N/A 10218B 11,559.0 N/A N/A 30 30 50% N/A N/A 10218C 467.5 6 N/A 6** 6 50% 23% 20 10218D 131.1 N/A 2 N/A N/A 50% 22% 20 10218E 105.4 N/A 3 N/A N/A 20% 23% 20

• Media collected immediately below the asphalt roadway were designated as surface soil.

All soil, asphalt and concrete samples were subjected to gamma spectroscopy analysis (HPGe). The MDC for the principal gamma-emitting radionuclides (Co-60 and Cs-137) was 0.1 pCi/g. Ten percent of all the soil samples collected were subjected to analysis for the Hard-to-Detect (HTD) radionuclides: Fe-55, Ni-63 and Sr-90. The MDC for the HTD radionuclides was 0.1 pCi/g. Sample analysis results are located in Attachments 1-2 through 1-10 of this document.

Process Surveys and sampling protocols were modeled after the ZionSolutions Draft Characterization Survey Package procedure (ZS-RP-107-001-001 Rev 0). This approach was intended to both capture the attributes required for site characterization and include the features that are necessary for final status surveys. In addition, the measures were intended as test cases for proofing the draft procedure. Survey and sample size determinations were based on the guidance provided by MARSSIM for Class 3 areas.

The survey package for each survey unit consists of:

• Cover sheet o Survey unit designation and name o Type of survey o Classification and, o Review and approval

• Survey Unit (SU) Walk-Down Form o Noting potential hazards o Hazards mitigation o Required preparations o SU classification.

4

• Characterization and Survey Design o SU description o Survey area size o Surfaces and media to be collected o Historical information o Number of measurements and samples to be acquired o Instrumentation required and associated MDC o Sample analysis to be performed and associated MDC o Description of types of samples and surveys o Replicate sample requirements o Scan coverage and justification o Survey instructions and sample identification codes Implementation Following development of the ISFSI Characterization Survey Plan individual survey packages were prepared for each survey unit. A Radiological Engineer/Supervisor from the EnergySolutions Commercial Services Group implemented the plan and individual survey packages. The EnergySolutions Commercial Service Group managed the contracts with the vendors used to support the characterization effort. The vendor support included:

• Asphalt and concrete core collection using core-bores.

• Surface and subsurface soil sampling using direct-push technology.

• Off site gamma spectroscopy and HTD radionuclide analysis of asphalt, concrete and soil samples.

Prior to performing surveys and sampling the responsible personnel were provided training by the EnergySolutions Radiological Engineer/Supervisor relative to the survey instruments to be used in performing the sampling and surveys and the associated procedures. The procedures provided by EnergySolutions were:

• CS-FO-PR-001 Performance of Radiological Surveys

• CS-FO-PR-002 Calibration and Maintenance of Radiological Survey Instruments

• CS-FO-PR-003 Soil Surveys, Collection of Water, Sediment, Vegetation, and Soil Samples; and Chain of Custody

• CS-FO-PR-004 QA/QC of Portable Radiological Survey Instruments

• CS-FO-PR-005 General Operation of Radiological Survey Instruments Daily safety meetings were also conducted by the EnergySolutions Radiological Engineer/Supervisor.

In addition to the above training the responsible ZionSolutions Radiological Engineer provided training to the technicians, EnergySolutions personnel and core bore/direct-push vendors on the survey packages, sampling, survey documentation, instrument response, and instrument alarm set points relative to each survey package. This training was performed in accordance with ZionSolutions Procedure ZS-TQ-100-008, Training Briefs. The Training Briefs are:

• ZS-FT-ISF-TRBR-002 Review of ISFSI Survey Instruction Package SU10218A, 11/8/11 5

• ZS-FT-ISF-TRBR-003 Review of ISFSI Survey Instructions Packages SU10218B, 10218C and 10218D 11/15/11

• ZS-FT-ISF-TRBR-004 Review of ISFSI Survey Instructions Package SU10218E 1/9/12 Survey locations for concrete cores, asphalt cores and soil samples were both judgmental and systematically selected. As practical, GPS technology was used to identify and plot the sample locations.

Figure 1-2 presents the sample locations for ISFSI Survey Units 10218A and 10218B. Sampling and measurement locations are provided for each survey unit in the individual survey unit sections of this document.

Figure 1-2 SU10218A and SU10218B Soil Sample Locations 6

SU10218A East Side of ISFSI (11,599 m2)

Gamma Scan Survey Gamma scan surveys were conducted over 50% of the survey unit. The measurements were conducted by dividing the width of the survey area into one meter survey lanes and assuming that the survey pattern covers a lane width of approximately 0.5 meters. The basis results in scan coverage of 5,780 m2. The instrument used was a Ludlum 2350-1 data logger coupled to a Ludlum Model 44-10 NaI detector. The detector end-cap was maintained at less than 8.0 cm from the soil surface and a scan speed of 0.25 m/s was used. This survey methodology was based on a soil MDC of 4.16 pCi/g for Cs-137. That is, the instrument and surveyors ability to detect 4.16 pCi/g of Cs-137 in the top 15 cm layer of soil. The model assumes a contaminated region 50 cm in diameter. Alarm set points were determined based on preliminary background surveys that were conducted prior to performing gamma scans. The gamma scans for SU10218A were performed using the Ludlum Model 2350-1 and Model 44-10 detector connected to a GPS unit. The instrument register was interrogated every second and a packet of count rate data was stored with the GPS coordinates. The downloaded data was used to create a plot of the survey locations relative to detector count rate. A total of 26,616 data points were recorded. A real time plot of the detector location and cpm data was overlaid on a map of the survey area. Figure 1-3 presents the plot and general statistics associated with the gamma scan survey. In addition to collection of data every one second during the survey the surveyor listens for an increase in count rate that could indicate a region of elevated activity. For any increase in count rate the surveyor slows the scan speed or stops and determines if an increase in count rate has occurred and flags or otherwise marks the area for further investigation. An instrument alarm requires that the suspect alarm region is resurveyed and if a second alarm occurred the area is marked for further investigation.

The gamma scan MDC value, 4.16 pCi/g was derived by assuming a radionuclide soil mixture of 10.0%

Co-60 and 90.0% Cs-137. The assumed soil derived concentration guidelines (DCGL) is based on the NRC Screening Levels found in both Table H-2 of NUREG-1757 Volume 2 Revision 1, Appendix H, and Table 6.91 (Pcrit = 0.10) of NUREG-5512 Volume 3. The listed DCGLs for Co-60 and Cs-137 are 3.8 and 11.0 pCi/g, respectively. Cs-137 is used as the surrogate radionuclide and formula 11-4 from NUREG-1505, Chapter 11was used to determine the surrogate relationship.

and, then, and, Where 50% of the assumed Cs-137surrogate DCGL is 4.16 pCi/g.

7

The assumed Cs-137surrogate DCGL is conservative relative to the expected pathway scenarios at the Zion Station Restoration Project. Figures 1-4 and 1-5 are bar graphs of the gamma scans conducted in SU 10218A. Figure 1-4 displays the cpm frequency for the 26,616 data points collected. Figure 1-5 presents the density of data for the count rates displayed in Figure 1-4. Based on the summary results of Figure 1-3 the observed maximum measured value is ~7400 cpm and relates to an MDC of 4.6 pCi/g Cs-137.

Figure 1-3 SU10218A Gamma Scan Plot 8

Figure 1-4 SU10218A Count Rate frequency (in cpm)

SU 10218A ISFSI East Gamma Scan 6000 1400-1800 5000 1800-2200 2200-2600 4000 2600-3000 3000-3400 frequency 3000 3400-3800 3800-4200 2000 4200-4600 4600-5000 1000 5000-5400 5400-5800 0 5800-6200 1 6600-7000 Data in Interval 7000-7400 Figure 1-5 SU10218A Count Rate Sample Density SU 10218A ISFSI East Gamma Scan 25 4

76 20 404 1037 Frequency (%)

2177 15 3197 3850 10 5504 5267 2932 5 1589 455 99 0

18 1

6 Data in Interval 1 9

Figure 1-6 SU10218A Frequency Chart 1 and 3rd Quartile, 26.616 Measurements st 10218A ISFSI East Gamma Scan Results 8,000 7,000 6,000 0.75 quartile 5,000 cpm 4,000 0.25 quartile 3,000 2,000 1,000 0

0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 frequency Figure 1-6 presents the first (0.25) and third (0.75) quartile of the 26,616 measurements. The measurement results are commensurate with the quartile (cpm) values provided in Figure 1-3.

Gamma scans were also conducted underneath randomly selected Vehicle Barrier System (VBS) barriers located along the switchyard parameter. The scans did not identify any areas of elevated activity. The observed gamma scan count rates ranged from 3,700 to 4,800 cpm that is indicative of surface soil MDCs for Cs-137 that range from of 2.3 to 3.6 pCi/g. It is important to note that the observed cpm range is due to the area background and not Cs-137 soil contamination.

Gamma Scan Investigations The gamma scan surveys did not identify any significant areas of elevated activity. Alarm set points were exceeded over a single area of approximately 23.2 m2. While it is expected that the instrument alarms were due to an increase in the local area background an investigation of the region was performed.

Additional gamma scan surveys were conducted using a Ludlum 2350-1 data logger and 44-10 NaI detector. Two surface and one subsurface soil samples were collected from regions of the highest scan measurement. Vendor laboratory results showed positive values for Cs-137 ranged from 0.11to 0.12 pCi/g for both of the surface soil samples. The positive results for Cs-137 were about 40% higher than any other analytical result for Cs-137 in SU10218A. The observed activity concentrations are not atypical of Cs-137 levels due to world-wide fallout in undisturbed soils. The vendor analysis also reported higher K-40 concentration (15.0 pCi/g) for these surface soil samples. These results were about 27% higher than any other K-40 result reported for the survey unit. The soil samples collected during the investigation were also analyzed for hard-to detect radionuclides expected to be predominant in the Zion Station plant-derived activity; these included Fe-55, Ni-63 and Sr-90. No positive results for these hard-to-detect radionuclides were observed. With the exception of the above noted Cs-137 results (that are expectedly due to world-wide fallout) no plant-derived activity was observed.

10

Soil Sampling Survey unit 10218A comprises an area of 11,559 m2. A total of 30 surface and 30 subsurface soil samples were collected from this survey location. Surface samples consist of the first 15.0 cm of soil.

Subsurface samples consist of samples collected over the next 15.0 to 100 cm of soil depth. If systematic soil sample locations fell on the asphalt roadway the asphalt media was also analyzed and the surface soil sample was collected from the media located directly below the asphalt.

All samples were subjected to gamma spectroscopic analysis (HPGe). Ten percent of the samples were analyzed for the HTD radionuclides Fe-55, Ni-63 and Sr-90. These HTD radionuclides have been observed in the10CFR61 sampling of the Zion Station radiological waste streams.

With the exception of Cs-137 vendor analysis results for the submitted samples did not identify any plant-derived radionuclides. Of the 68 samples analyzed for SU10218A Cs-137 was positively identified in 26 of the samples. The Cs-137 concentration ranged from 1.22E-02 to 1.16E-01 pCi/g. The mean Cs-137 concentration for the positive soil results reported is 4.80E-02 pCi/g. The mean Cs-137 concentration for all the soil samples was determined to be 4.12E-02 pCi/g. These values are consistent with Cs-137 world-wide fallout concentrations for disturbed soils.

Vendor soil results for SU10218A are provided in Attachment 1-2 for the following radionuclides: Ac-228, Am-241, Co-60, Cs-134, Cs-137, Eu-154, Eu-155, I-129, K-40, Pb-214, Tl-208 and U-235.

Duplicate Samples Duplicate media samples from four sample locations were evaluated. Sample comparisons were performed for the following radionuclides: Ac-228, Cs-137, K-40, Pb-2124 and Tl-208. Radionuclides reported at MDC levels are not evaluated. The evaluation method is provided in Section 4.2.2 of the ZionSolutions Quality Assurance Project Plan (for Characterization and FSS). Duplicate samples were randomly selected. The evaluation results are provided in Attachment 1-3. All sample comparisons for the radionuclides subjected for duplicate sample evaluation passed the test criteria found in the Quality Assurance Project Plan.

Hard-to-Detect Radionuclide Analysis As previously stated, ten percent of the media samples were submitted for hard-to-detect radionuclide analysis. HTD samples were randomly selected from the sample population with the exception of samples collected from areas requiring investigations. Vendor analysis was performed for Fe-55, Ni-63 and Sr-90. No HTD radionuclides were observed in the submitted samples. The results for these samples are presented in Attachment 1-4.

SU10218B West Side of ISFSI (11,599 m2)

Gamma Scan Survey Survey unit 10218B comprises an area of 11,559 m2. Gamma scan surveys were conducted over 50% of the survey unit. The measurements were conducted by dividing the width of the survey area into one meter survey lanes and assuming that the survey pattern covers a lane width of approximately 0.5 meters.

The basis results in scan coverage of 5,780 m2. The instrument used was a Ludlum 2350-1 data logger 11

coupled to a Ludlum Model 44-10 NaI detector. The detector end-cap was maintained at less than 8.0 cm from the soil surface and a scan speed of 0.25 m/s was used. This survey methodology was based on a soil MDC of 4.16 pCi/g for Cs-137. That is, the instrument and surveyors ability to detect 4.16 pCi/g of Cs-137 in the top 15 cm layer of soil. The model assumes a contaminated region 50 cm in diameter. The 4.16 pCi/g Cs-137 MDC derivation is the same as that provided for SU 10218A. Alarm set points were determined based on preliminary background surveys that were conducted prior to performing gamma scans. During the scanning process the surveyor listens for any increase in the instrument count rate. If an increase in instrument count rate occurs the surveyor slows or stops the survey in order to determine if the increased count rate is indicative of a region of elevated activity. Suspect areas are marked for later investigation. If instrument alarms occurred the surveyor stopped the survey and resurveyed the region where the alarm was suspected to have occurred. If a second alarm occurs the suspect region is marked for later investigations. The instrument gamma scans for SU 10218B were conducted with the instrument operating in the latching mode. In this configuration the instrument stores the highest measurement in memory until the memory location is reset. In this mode the surveyors are provided a visual indication of the maximum count rate for a given region of the lane being surveyed. The maximum count rate (latching mode value) was saved for every 8 to 10 linear meters of travel during the survey process. The downloaded data was used to create a plot of the survey detector count rates over the survey unit (The same information can be used to locate a specific region where the saved measurement occurred). A total of 1,670 data points were recorded. Figure 1-5 presents a bar graph of the count rate frequency for the survey results. Table 1-3 lists the general statistics associated with the recorded measurements.

Figure 1-5 SU10218B Count Rate Frequency (in cpm) 18.00 3200-3400 16.00 3400-3600 3600-3800 14.00 3800-4000 4000-4200 12.00 4200-4400 4400-4600 Frequency (%)

10.00 4600-4800 4800-5000 5000-5200 8.00 5200-5400 5400-5600 6.00 5600-5800 5800-6000 4.00 6000-6200 6200-6400 2.00 6400-6600 6600-6800 0.00 6800-7000 cpm ==>

12

Table 1-3 SU10218B General Statistics, Gamma Scan Measurements Count 1670.0 Skewness -0.1561 Minimum 3228.0 Kurtosis 0.2248 Maximum 6897.0 Median 5038.0 Mean 5019.0 First Quartile 4708.0 Standard Deviation 507.1 Third Quartile 5355.0 Figure 1-6 is a frequency plot of the gamma scan count rate results showing the first and third quartile.

Figure 1-6 SU10218B First and Third Quartile 7000 6500 6000 5500 0.25 quantile cpm 5000 0.75 quantile 4500 4000 3500 3000 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 Frequency Figure 1-7 presents the gamma scan mean, 95% (1.96) and 99.7% (3) confidence levels for the measurements. The maximum gamma scan value reported for SU10218B was 6897 cpm. This value equates to a Cs-137 MDC of ~3.7 pCi/g based on the survey methodology and assumptions.

Gamma scans were conducted of the soil under randomly selected VBS barriers. The observed count rates ranged from 3,640 to 4390 cpm. No elevated count rates were encountered. The observed count rates relate to a Cs-137 MDC of 2.7 to 3.0 pCi/g.

13

Figure 1-7 SU10218B Gamma Scan Mean, 95 and 99.7% Confidence Levels SU10218B Gamma Scan Measurements 7000 3

6000 1.96 5000 mean cpm 4000 --1.96

-3 3000 2000 1000 0 300 600 900 1200 1500 1800 n

The gamma scan surveys for SU10218B did not detect any areas of elevated activity. One instrument alarm was observed and the location was resurveyed. No elevated count rates or alarms were encountered. The initial alarm was noted as a false positive.

Gamma Scans of SU10218B did not detect any regions of elevated activity. The results of the gamma scans did not exceed a MDC for Cs-137 greater than ~3.7 pCi/g.

Soil Sampling Survey unit 10218B comprises an area of 11,559 m2. A total of 30 surface and 30 subsurface soil samples were collected from this survey location. Surface samples consist of the first 15.0 cm of soil. Subsurface samples consist of samples collected over the next 15.0 to 100 cm of soil depth. If a systematic soil sample location occurred on the asphalt roadway the asphalt media was also analyzed and the surface soil sample was collected from the media located directly below the asphalt.

All samples were subjected to gamma spectroscopic analysis (HPGe). Ten percent of the samples were analyzed for the HTD radionuclides H-3, Fe-55, Ni-63 and Sr-90. These HTD radionuclides have been observed in the10CFR61 sampling of the Zion Station radiological waste streams.

With the exception of Cs-137 vendor analysis results for the submitted samples did not identify any plant-derived radionuclides. Of the 66 samples analyzed Cs-137 was positively identified in 25 of the samples.

The Cs-137 concentration ranged from 2.91-02 to 3.07-01 pCi/g. The mean Cs-137 concentration for the positive soil results reported is 7.90E-02 pCi/g. The mean Cs-137 concentration for all the soil samples was determined to be 5.24E-02 pCi/g.

14

Vendor soil results for SU10218B are provided in Attachment 1-5 for the following radionuclides: Ac-228, Am-241, Co-60, Cs-134, Cs-137, Eu-154, Eu-155, I-129, K-40, Pb-214, Tl-208 and U-235.

With the exception of the Cs-137 results for sample location L310218CSGSSSB003 (3.07E-01 +/-4.94E-02 pCi/g) the reported values are consistent with Cs-137 world-wide fallout concentrations for disturbed soils. Soil sample L310218CSGSSSB003 is a surface soil sample collected from the top 15 cm of soil.

The gamma spectroscopy results for this sample were examined and found to be valid. Gamma scans results did not identify any areas of elevated activity in the region from which the sample was collected.

The sample location reflects the regional flora and that the observed Cs-137 concentration is likely due to world-wide fallout in undisturbed soil. Additional samples were collected from this sample location.

Soil Sample Investigation Based on the soil sample results for surface soil sample location L310218CSGSSSB003 five additional samples were collected from the area associated with the sample location.. Each sample consisted of approximately 1.0 liter of soil (~1,300 g). One surface soil sample was collected from the same location as L310218CSGSSSB003 and one surface sample was collected at a two meter distance from the original sample point for each major compass point (North, South, East and West). The results are provided in Table 1-4.

Table 1-4 Sample Location L310218CSGSSSB003 Investigation Results Sample ID (Location) Cs-137 Activity (in pCi/g)

L310218IIGSSSB003 (Sample Origin) 0.178 +/-0.027 L310218IIGSSSB004 (2.0 m North) 0.225 +/- 0.030 L310218IIGSSSB005 (2.0 m South) 0.188 +/- 0.028 L310218IIGSSSSB006 (2.0 m East) 0.196 +/- 0.031 L310218IIGSSSSB007 (2.0 m West) 0.230 +/- 0.034 A second sample collected at the same location as L310218CSGSSSB003 resulted in value of 1.78E-01 pCi/g. The average of the five samples collected within two meters of the original sample location is 2.03E-01 pCi/g. These samples provide a better estimate of the Cs-137 activity at this location. The results are comparable to the activity that would be associated with world-wide fallout for undisturbed soils. To support the hypothesis that sample location L310218CSGSSSB003 was from undisturbed soil three additional samples were collected along the same southern heading but among the natural flora that exist along the wetland border. Reconnaissance of this region is indicative of undisturbed soils. The results are provided in Table 1-5. Samples L310218IIGSSSB008 through L310218IIGSSSB010 were collected from a region of approximately 3.5 by 3.5 m. The samples were collected from the top 15 cm of soil. The three samples that were collected for this investigation reflect fine dark sandy loam and organics which is consistent with undisturbed soils in the local sample area.

15

Table 1-5 Sample Results for Undisturbed Soil Region Sample ID Cs-137 Activity (Location) (in pCi/g)

L310218IIGSSSB008 0.291 +/- 0.030 L310218IIGSSSB009 0.394 +/- 0.036 L310218IIGSSSB010 0.283 +/- 0.031 The undisturbed soil sample Cs-137 concentration collected among the flora ranged from 0.283 to 0.394 pCi/g. The average Cs-137 concentration is 0.323 pCi/g and is consistent with sample location L310218CSGSSSB003 results (0.307 pCi/g). These latter soil sample results conclude that the Cs-137 concentration observed for sample location L310218CSGSSSB003 is due to world-wide fallout and not plant-derived activity.

Duplicate Samples Duplicate media samples from five sample locations were evaluated. Sample comparisons were performed for the following radionuclides: Ac-228, Cs-137, K-40, Pb-2124 and Tl-208. Radionuclides reported at MDC levels are not evaluated. The evaluation method is provided in Section 4.2.2 of the ZionSolutions Quality Assurance Project Plan (for Characterization and FSS). Duplicate samples were randomly selected. The evaluation results for SU10218B are provided in Attachment 1-6. All sample comparisons for the radionuclides subjected for duplicate sample evaluation passed the test criteria.

Hard-to-Detect Radionuclide Analysis As previously stated, ten percent of the media samples for SU10218B were submitted for hard-to-detect radionuclide analysis. HTD samples were randomly selected from the sample population with the exception of samples collected from areas requiring investigations. Vendor analysis was performed for H-3, Fe-55, Ni-63 and Sr-90. No HTD radionuclides were observed in the submitted samples. The results for these samples are presented in Attachment 1-7.

SU10218C Asphalt Roadway South of Switchyard (467.5 m2)

Survey Unit 10218C consists of the asphalt roadway immediately south of the Switchyard. This survey unit traverses east and west through the north end of SU10218A and SU10218B. The roadway is approximately 5.8 m wide and extends approximately 81 meters west from the southeast corner of the Switchyard fence. Figure 1-8 presents a map of the roadway and the beta direct measurement locations.

Gamma Scan Survey The gamma scan survey for the Asphalt Roadway was included as part of the gamma scan survey for SU10218A and SU10218B. The gamma surveys conducted over the Asphalt Roadway did not detect any areas of elevated activity.

Beta Scan Survey A beta scan survey was conducted over 23% of the survey unit. The survey was conducted using a Ludlum 2350-1 data logger connected to a 43-37 gas-flow proportional detector. The detector window is 16

0.438 m wide and three passes over the entire length (81 m) of the roadway were conducted along each edge and the central region of the roadway resulting in scan coverage of 106.4 m2 or 23% coverage.

Figure 1-8 SU10218C Asphalt Roadway Direct Measurement Sample Locations The beta scan survey did not detect any areas of elevated activity. Table 1-6 presents the results of the beta scan survey for each 10 meter survey increment. The beta survey was conducted using the latching mode of the 2350-1 instrument where the highest count rate for a given scan region is saved to memory until the latching mode is reset. Measurements were recorded approximately every 10 meters of travel resulting in 24 measurements being recorded. . The instrument scan speed was one detector width per second (13.34 cm/s). The total efficiency (t) used was 0.0983 (Tc-99). The source efficiency (0.25) is based on Table 2 of International Standard, ISO-7503-1. The detector window area was conservatively assumed to be 100 cm2 (true detector window area is 584 cm2) to account for any elevated region under 17

the detector window. For example the background MDC calculation for the 43-37 detector results in an MDC of 4.18E+03 dpm/100 cm2 (see Table 1-6). If the actual window area is used the MDC value is 5.84 times lower or 7.15E+02 dpm/100 cm2.

Table 1-6 SU10218C Beta Scan Measurements Ludlum Model 43-37 Parameters

Background:

738 cpm d :1.38 MDC:

4.18E+03 Average t: 0.0983 Scan Speed: 13.34 cm/s 2

dpm/100 cm2 Window Area: 584 cm Surveyor Efficiency: 0.5 Scan dpm/100 Gross cpm Net cpm Results Segment cm2*

1 8.54E+02 1.16E+02 1.18E+03 4.18E+03 2 8.41E+02 1.03E+02 1.05E+03 4.18E+03 3 8.25E+02 8.70E+01 8.87E+02 4.18E+03 4 8.79E+02 1.41E+02 1.44E+03 4.18E+03 5 9.12E+02 1.74E+02 1.77E+03 4.18E+03 6 9.93E+02 2.55E+02 2.60E+03 4.18E+03 7 1.01E+03 2.74E+02 2.79E+03 4.18E+03 8 1.12E+03 3.83E+02 3.90E+03 4.18E+03 9 1.07E+03 3.35E+02 3.41E+03 4.18E+03 10 1.04E+03 2.97E+02 3.03E+03 4.18E+03 11 9.56E+02 2.18E+02 2.22E+03 4.18E+03 12 9.92E+02 2.54E+02 2.59E+03 4.18E+03 13 9.75E+02 2.37E+02 2.42E+03 4.18E+03 14 9.13E+02 1.75E+02 1.78E+03 4.18E+03 15 9.59E+02 2.21E+02 2.25E+03 4.18E+03 16 1.02E+03 2.81E+02 2.86E+03 4.18E+03 17 1.04E+03 2.99E+02 3.05E+03 4.18E+03 18 1.06E+03 3.22E+02 3.28E+03 4.18E+03 19 9.41E+02 2.03E+02 2.07E+03 4.18E+03 20 8.78E+02 1.40E+02 1.43E+03 4.18E+03 21 9.74E+02 2.36E+02 2.41E+03 4.18E+03 22 1.06E+03 3.20E+02 3.26E+03 4.18E+03 23 1.10E+03 3.63E+02 3.70E+03 4.18E+03 24 1.01E+03 2.76E+02 2.81E+03 4.18E+03

• Conservatively assumes 100 cm2 area for 43-37 (584.cm2) detector. If the observed activity is uniformly distributed then the above reported results are 5.84 times lower.

The surveyor efficiency is not used to determine the results.

The result for the beta scan is 4.18E+03 dpm/100 cm2 and assumes a detector area of 100 cm2.

Adjusting for the actual detector window size results in a value of 7.16 E+02 dpm/100 cm2.

The alarm set point for the beta scans was set at the background MDCR plus the background (738 + 290 cpm) or 1030 cpm. No alarms were encountered during the scan survey. During the scan the surveyors also listened for increases in the instrument count rate and slowed or stopped the scan survey if an increase in count rate was detected. The beta scan survey did not detect any areas of elevated activity.

18

Direct Beta Measurements A total of 20 direct beta surface measurements were acquired at systematic locations over the asphalt roadway. Figure 1-8 depicts the location of each of the direct measurements. The measurements were acquired using a Ludlum Model 2350-1 instrument and Model 43-68 gas-flow proportional detector. The MDC was determined using the following formula:

Where, RB = background in cpm [262 cpm] (The background was determined by averaging ten direct Measurements acquired from the concrete background reference area located in the park.)

ts = sample count time (in minutes) [1.0 minute]

tb = background count time (in minutes) [10 minutes]

t = total efficiency [0.1138]

A = detector active window area (in cm2) [126 cm2]

And, Table 1-7 SU310218C Asphalt Roadway Direct Measurements Location Code Gross cpm Net cpm dpm/100 cm2 Results (dpm/100 cm2)

L310218CSPATBC001 2.36E+02 -2.60E+01 MDC 4.08E+02 L310218CSPATBC002 2.52E+02 -1.00E+01 MDC 4.08E+02 L310218CSPATBC003 2.79E+02 8.60E+01 1.19E+02 1.19E+02 L310218CSPATBC004 2.55E+02 -7.00E+00 MDC 4.08E+02 L310218CSPATBC005 2.52E+02 -1.00E+01 MDC 4.08E+02 L310218CSPATBC006 2.40E+02 -1.20E+01 MDC 4.08E+02 L310218CSPATBC007 2.65E+02 3.00E+00 2.09E+01 4.08E+02 L310218CSPATBC008 2.65E+02 3.00E+00 2.09E+01 4.08E+02 L310218CSPATBC009 2.77E+02 1.50E+01 1.05E+02 4.08E+02 L310218CSPATBC010 2.66E+02 4.00E+00 2.79E+01 4.08E+02 L310218CSPATBC011 2.54E+02 -8.00E+00 MDC 4.08E+02 L310218CSPATBC012 2.34E+02 -2.80E+01 MDC 4.08E+02 L310218CSPATBC013 2.65E+02 3.00E+00 2.09E+01 4.08E+02 L310218CSPATBC014 2.71E+02 9.00E+00 6.28+01 4.08E+02 L310218CSPATBC015 2.61E+02 -1.00E+00 MDC 4.08E+02 L310218CDPATBC015 3.01E+02 1.08E+02 2.72E+02 4.08E+02 L310218CSPATBC016 2.72E+02 1.00E+01 6.97E+01 4.08E+02 L310218CSPATBC017 2.71E+02 9.00E+00 6.28E+01 4.08E+02 L310218CSPATBC018 2.79E+02 1.70E+01 1.19E+02 4.08E+02 L310218CSPATBC019 2.60E+02 -2.00+00 MDC 4.08E+02 L310218CSPATBC020 2.39E+02 -2.30E+01 MDC 4.08E+02 19

All direct beta measurements were less than or equal to the MDC of 4.08E+02 dpm/100 cm2.

Generic gross betas DCGLs for surfaces were derived using the 10CFR61 radionuclide results associated with the Zion Station DAW mixture. The NRC screening level DCGL values were obtained from NUREG-5512 Volume 3 Table 5.19 and are consistent with those found in NUREG-1757 Volume 1, Appendix H-1. There are three separate DAW results for Zion Station represents Unit 1, Unit 2 and the Auxiliary Building. The nuclide fraction Co-60 varies significantly between these structures resulting in wide variations in the DCGL for each area. The most conservative gross beta DCGL was 7.30E+03 dpm/100 cm2 and reflects the Co-60 nuclide fraction dominance (87-92% of the mixture) observed for Unit 2 and the Auxiliary Building. This gross beta DCGL derived from the most conservative DAW waste stream is used to examine the direct beta measurements from SU10218C (Asphalt Roadway). The MDC observed for the gross beta measurement from SU10218C is 5.6% of the generic DCGL. It should be noted that the background for the direct beta measurements was determined from measurements acquired from the Park area and represents unaffected media.

Direct Beta Measurement Duplicate Sample A duplicate direct beta measurement was acquired for sample location L310218CSPATBC015 (L310218CDPATBC015). The duplicate sample measurement was randomly selected. The duplicate sample measurement evaluation method is provided in Section 4.2.2 of the ZionSolutions Quality Assurance Project Plan (for Characterization and FSS). The evaluation results for the samples are provided in Table 1-8. The sample comparison for the direct measurement subjected for duplicate sample evaluation passed the test criteria.

Table 1-8 Duplicate Sample Comparison Location Code Gross cpm Net cpm dpm/100 cm2 L310218CSPATBC015 2.61E+02 -1.00E+00 4..08E+02 L310218CDPATBC015 30.1E+02 3.90E+01 2.72E+02 Sigma: 1.97E+02 Resolution: <4.0 Acceptance Ratio: 0.4-2.5 Calculated Acceptance Value: 1.50 Result: Passed MDC is 4.08E+02 dpm/100 cm2 Asphalt and Soil Sampling A total of 18 asphalt and soil samples were acquired from SU10218C. The samples represented six random locations. The samples consisted of the asphalt, the media directly beneath the asphalt (surface soil) and the subsurface soil (15 to 100 centimeters beneath the soil surface). Vendor gamma spectroscopy results for SU10218C are provided in Attachment 1-8 for the following radionuclides: Ac-228, Am-241, Co-60, Cs-134, Cs-137, Eu-154, Eu-155, I-129, K-40, Pb-214, Tl-208 and U-235.

With the exception of Cs-137 the vendor sample analysis did not detect any plant derived radionuclides.

Of the 18 samples analyzed Cs-137 was positively identified in 3 samples. The maximum observed positive Cs-137 activity was 3.16E-02 pCi/g. The positive Cs-137 activity ranged from 9.86E-03 to 20

3.16E-2 pCi/g. The mean Cs-137 concentration for the positive soil results reported is 2.12E-02 pCi/g.

The mean Cs-137 concentration for all the soil samples was determined to be 2.43E-02 pCi/g.

SU10218D Mix Plant Concrete Pad (131.1 m2)

Figure 1-9 SU10218D Mix Plant Pad Concrete Core and Direct Measurement Locations Core D002 Core D001 21

Survey Unit 10218D is the Mix Plant concrete pad. This concrete pad is located about 60 meters south of the Switchyard fence. The pad is located on the east and west boundary of SUs 10218A and 10218B Gamma Scan Survey The gamma scan survey for the Mix Plant concrete pad was included as part of the gamma scan survey for SU10218A and SU10218B. The gamma surveys conducted over the Mix Plant pad did not detect any areas of elevated activity.

Beta Scan Survey A beta scan survey was conducted over 22.3% of the survey unit. The survey was conducted using a Ludlum 2350-1 data logger connected to a 43-37 gas-flow proportional detector. The detector window is 0.438 m wide and three passes over the longest length of each joined section of the pad resulted in scan coverage of 29.24 m2 or 22.3 percent coverage.

Table 1-9 presents the results of the beta scan survey for each 10 meter survey increment. The beta survey was conducted using the latching mode of the 2350-1 instrument where the highest count rate for a given scan region is saved to memory until the latching mode is reset. Measurements were recorded approximately every 10 meters of travel resulting in 20 measurements being recorded. The instrument scan speed was one detector width per second (13.34 cm/s). The total efficiency (t) used was 0.0983 (Tc-99). The source efficiency (0.25) is based on Table 2 of International Standard, ISO-7503-1. The detector window area was conservatively assumed to be 100 cm2 (true detector window area is 584 cm2) to account for any elevated region under the detector window. For example, the background MDC calculation for the 43-37 detector results in an MDC of 4.38E+03 dpm/100 cm2 (see Table 1-9). If the actual window area is used the MDC value is 5.84 times lower or 7.50E+02 dpm/100 cm2. The maximum result for the beta scan is 4.384E+03 dpm/100 cm2 and assumes a detector area of 100 cm2.

The alarm set point for the beta scans was set at the background MDCR plus the background (811 + 304 cpm) or 1115 cpm. Where:

No alarms were encountered during the scan survey. During the scan the surveyors also listened for increases in the instrument count rate and slowed or stopped the scan survey if an increase in count rate was detected. The beta scan survey did not detect any areas of elevated activity.

22

Table 1-9 SU10218D Beta Scan Measurements Ludlum Model 43-37 Parameters

Background:

811 cpm d :1.38 MDC =

4.38E+03 Average t: 0.0983 Scan Speed: 13.34 cm/s 2

dpm/100 cm2 Window Area: 584 cm Surveyor Efficiency: 0.5 Scan Gross cpm Net cpm dpm/100 cm2* Results Segment 1 1.16+03 3.49E+02 3.55E+03 4.38E+03 2 1.14E+03 3.29E+02 3.35E+03 4.38E+03 3 1.18E+03 3.69E+01 3.75E+03 4.38E+03 4 1.20E+03 3.89E+02 3.96E+03 4.38E+03 5 1.15E+03 3.39E+02 3.45E+03 4.38E+03 6 1.19E+03 3.79E+02 3.86E+03 4.38E+03 7 1.13E+03 3.19E+02 3.25E+03 4.38E+03 8 1.09E+03 2.79E+02 3.84E+03 4.38E+03 9 1.14E+03 3.29E+02 3.35E+03 4.38E+03 10 1.21E+03 3.99E+02 4.06E+03 4.38E+03 11 1.18E+03 3.69E+02 3.75E+03 4.38E+03 12 1.19E+03 3.79E+02 3.86E+03 4.38E+03 13 1.19E+03 3.79E+02 3.86E+03 4.38E+03 14 9.90E+02 1.79E+02 2.00E+03 4.38E+03 15 1.08E+03 2.69E+02 2.74E+03 4.38E+03 16 1.06E+03 2.49E+02 2.53E+03 4.38E+03 17 1.07E+03 2.59E+02 2.64E+03 4.38E+03 18 1.11E+03 2.99E+02 3.04E+03 4.38E+03 19 1.13E+03 3.19E+02 3.25E+03 4.38E+03 20 1.20E+03 3.89E+02 3.96E+03 4.38E+03

• Surveyor efficiency is not used in the calculation of the results. Conservatively assumes 100 cm2 area for 43-37 (584.cm2) detector. If the observed activity is uniformly distributed then the above reported results are 5.84 times lower.

Direct Beta Measurements A total of 20 direct beta surface measurements were acquired at systematic locations over the mix plant concrete pad. Figure 1-9 depicts the location of each of the direct measurements. Table 1-10 presents the direct beta measurement results. The measurements were acquired using a Ludlum Model 2350-1 instrument and Model 43-68 gas-flow proportional detector. The MDC was determined using the following formula:

Where, RB = background in cpm [263 cpm]

ts = sample count time (in minutes) [1.0 minute]

tb = background count time (in minutes) [10 minutes]

t = total efficiency [0.1138]

A = detector active window area (in cm2) [126 cm2]

23

And, Table 1-10 SU310218D Mix Plant Concrete Pad Direct Measurements Location Code Gross cpm Net cpm dpm/100 cm2 Results (dpm/100 cm2)

L310218CSFCTBD001 3.02E+02 3.90E+01 2.72E+02 4.09E+02 L310218CSFCTBD002 3.29E+02 6.60E+01 4.60E+02 4.60E+02 L310218CSFCTBD003 3.13E+02 5.00E+01 3.49E+02 4.09E+02 L310218CSFCTBD004 2.88E+02 2.50E+01 1.74E+02 4.09E+02 L310218CSFCTBD005 3.06E+02 4.30E+01 3.00E+02 4.09E+02 L310218CSFCTBD006 2.94E+02 3.10E+01 2.16E+02 4.09E+02 L310218CSFCTBD007 2.92E+02 2.90E+01 2.02E+02 4.09E+02 L310218CSFCTBD008 2.69E+02 6.00E+00 4.18E+01 4.09E+02 L310218CSFCTBD009 2.91E+02 2.80E+01 1.95E+02 4.09E+02 L310218CSFCTBD010 3.18E+02 5.50E+01 3.84E+02 4.09E+02 L310218CSFCTBD011 3.06E+02 4.30E+01 3.00E+02 4.09E+02 L310218CSFCTBD012 3.42E+02 7.90E+01 5.51E+02 5.51E+02 L310218CSFCTBD013 2.92E+02 2.90E+01 2.02E+02 4.09E+02 L310218CSFCTBD014 2.84E+02 2.10E+01 1.47E+02 4.09E+02 L310218CSFCTBD015 3.31E+02 6.80E+01 4.74E+02 4.74E+02 L310218CSFCTBD016 3.25E+02 6.20E+02 4.32E+02 4.32E+02 L310218CSFCTBD017 2.94E+02 3.10E+01 2.16E+02 4.09E+02 L310218CDFCTBD017 3.50E+02 8.70E+01 6.07E+02 6.07E+02 L310218CSFCTBD018 3.21E+02 5.80E+01 405E+02 4.09E+02 L310218CSFCTBD019 2.93E+02 3.00E+01 2.09E+02 4.09E+02 L310218CSFCTBD020 3.00E+02 3.70E+01 2.58E+02 4.09E+02 Positive Direct beta measurements ranged from 4.09E+02 to 6.07E+02 dpm/100 cm2. The mean concentration for positive measurement results was 5.05E+02 dpm/100 cm2. The mean concentration for all the measurements was 4.32E+02 dpm/100 cm2.

Generic gross betas DCGLs for surfaces were derived using the 10CFR61 radionuclide results associated with the Zion Station DAW mixture. The NRC screening level DCGL values were obtained from NUREG-5512 Volume 3 Table 5.19 and are consistent with those found in NUREG-1757 Volume 1, Appendix H-1. There are three separate DAW results for Zion Station represents Unit 1, Unit 2 and the Auxiliary Building. The nuclide fraction Co-60 varies significantly between these structures resulting in wide variations in the DCGL for each area. The most conservative gross beta DCGL was 7.30E+03 dpm/100 cm2 and reflects the C0-60 nuclide fraction dominance (87-92% of the normalize3d mixture) observed for Unit 2 and the Auxiliary Building. This gross beta DCGL derived from the most conservative DAW waste stream is used to examine the direct beta measurements from SU10218C (Asphalt Roadway). The average gross beta measurement from SU10218D is 6.9% of the generic DCGL.

The maximum observed gross beta measurement from SU10218D is 8.3% of the generic DCGL.

24

Direct Beta Measurement Duplicate Sample A duplicate direct beta measurement was acquired for sample location L310218CDFCTBD017 (L310218CDFCTBD017). The duplicate sample was randomly selected. The duplicate sample evaluation method is provided in Section 4.2.2 of the ZionSolutions Quality Assurance Project Plan (for Characterization and FSS). . The evaluation results for the samples are provided in Table 1-11. The sample comparison for the direct measurement subjected for duplicate sample evaluation passed the test criteria.

Table 1-11 SU10218D Duplicate Sample Comparison Location Code Gross cpm Net cpm dpm/100 cm2 L310218CSFCTBD017 2.94E+02 3.10E+01 4.09E+02 L310218CDFCTBD017 3.50E+02 8.70E+01 6.07E+02 Sigma: 1.39E+02 Resolution: <4.0 Acceptance Ratio: 0.4-2.5 Calculated Acceptance Value: 0.67 Result: Passed Concrete Core Sampling Two concrete core samples were acquired from SU10218D (see figure 1-9). The cores consisted of concrete from the pad surface to a depth of 15 cm. Vendor gamma spectroscopy results for SU10218D are provided in Attachment 1-9 for the following radionuclides: Ac-228, Am-241, Co-60, Cs-134, Cs-137, Eu-154, Eu-155, I-129, K-40, Pb-214, Tl-208 and U-235. No plant-derived activity was observed. The maximum Cs-137 results for the concrete cores were 3.92E-02 pCi/g.

SU10218E Hazardous Waste Storage Building Concrete Pad (105.4 m2)

SU10218E is the Hazardous Waste Storage Building Concrete pad. This 8.2 by 12.8 m is located about 18.3 meters west and 7.6 m south of the southwest corner of the Switchyard fence.

Gamma Scan Survey The gamma scan survey for the Hazardous Waste Storage Building pad resulted in a gamma scan coverage of 20.0 percent. The gamma surveys conducted over the concrete pad did not detect any areas of elevated activity.

Table 1-12 presents the results of the gamma scan survey for each 10 meter survey increment and notes the Cs-137 surrogate MDC for each scan segment. The gamma scan survey was conducted using the latching mode of the 2350-1 instrument where the highest count rate for a given scan region is saved to memory until the latching mode is reset. Measurements were recorded approximately every 10 meters of travel resulting in 6 measurements being recorded. The instrument scan speed was 0.25 m/s (~10 inches/s) with the detector 7.62 cm (3.0 inches) from the surface. The general area background was 4.40E+03 cpm. Based on the scan speed, distance of the detector from the concrete surface and surveyor efficiency the alarm set point is equivalent ~3.4 pCi/g using the same Cs-137 and Co-60 mixture as noted for SU10218A and SU10218B. During the scan the surveyors also listened for increases in the 25

instrument count rate and slowed or stopped the scan survey if an increase in count rate was detected.

The gamma scan survey did not detect any areas of elevated activity.

Table 1-12 SU10218E Gamma Scan Results MDC Equivalent Location Gross cpm (pCi/g) 1 4.94E+03 3.15 2 5.25E+03 3.20 3 4.95E+03 3.15 4 4.79E+03 3.08 5 5.09E+03 3.15 6 5.25E+03 3.20 Beta Scan Survey A beta scan survey was conducted over 34.8% of the survey unit. The survey was conducted using a Ludlum 2350-1 data logger connected to a 43-68 gas-flow proportional detector. The 43-68 detector window has a active width of 0.1432 m and twenty passes were conducted over the length of the pad at a rate of one active window width per second (8.8 cm/s) resulted in a scan coverage of 36.6 m2 or 34.8 percent coverage.

Table 1-13 presents the results of the beta scan survey for each 12.8 meter pad length. The beta survey was conducted using the latching mode of the 2350-1 instrument where the highest count rate for a given scan region is saved to memory until the latching mode is reset. Measurements were recorded approximately every 12.8 meters of travel resulting in 20 measurements being recorded. The detector window area for the Model 43-68 is 126 cm2. The instrument scan speed was one detector width per second (8.8 cm/s). The total efficiency (t) used was 0.114 (Tc-99). The source efficiency (0.25) is based on Table 2 of International Standard, ISO-7503-1. The maximum positive result for the beta scan is 1.95+03 dpm/100 cm2.

The alarm set point for the beta scans was set at the background MDCR plus the background (263 +173 cpm) or 436 cpm. One alarm was encountered and upon subsequent surveys the activity decreased significantly indicating the presence of Ra-Th daughters (Initial cpm: 514; Final cpm: 403). The residual activity equated to a scan value that was less than the alarm set point. During the scan the surveyors also listened for increases in the instrument count rate and slowed or stopped the scan survey if an increase in count rate was detected. The beta scan survey did not detect any areas of elevated activity.

26

Table 1-13 SU10218E Beta Scan Measurements

Background:

263 cpm d :1.38 MDC:

Average t: 0.114 Scan Speed: 8.8 cm/s 1.71E+03 Window Area: 126 cm2 Surveyor Efficiency: 0.5 dpm/100 cm2 Scan Gross cpm Net cpm dpm/100 cm2 Results Segment 1 341 78 7.69E+02 1.71E+03 2 337 74 7.30E+02 1.71E+03 3 337 74 7.30E+02 1.71E+03 4 357 94 9.27E+02 1.71E+03 5 407 144 1.42E+03 1.71E+03 6 426 163 1.61E+03 1.71E+03 7 388 125 1.23E+03 1.71E+03 8 395 132 1.30E+03 1.71E+03 9 402 139 1.37E+03 1.71E+03 10 461 198 1.95E+03 1.95E+03 11 390 127 1.25E+03 1.71E+03 12 406 143 1.41E+03 1.71E+03 13 380 117 1.15E+03 1.71E+03 14 398 135 1.33E+03 1.71E+03 15 362 99 9.76E+02 1.71E+03 16 408 145 1.43E+03 1.71E+03 17 401 138 1.36E+03 1.71E+03 18 382 119 1.17E+03 1.71E+03 19 405 142 1.40E+03 1.71E+03 20 378 115 1.13E+03 1.71E+03 Direct Beta Measurements A total of 20 direct beta surface measurements were acquired at systematic locations over the Hazardous Waste Storage Building pad. Figure 1-10 depicts the location of each of the direct measurements. Table 1-14 presents the direct beta measurement results. The measurements were acquired using a Ludlum Model 2350-1 instrument and Model 43-68 gas-flow proportional detector. The MDC was determined using the following formula:

Where, RB = background in cpm [281 cpm]

ts = sample count time (in minutes) [1.0 minute]

tb = background count time (in minutes) [10 minutes]

t = total efficiency [0.1138]

A = detector active window area (in cm2) [126 cm2]

27

And, Table 1-14 SU310218E Hazardous Waste Storage Pad Direct Measurements Location Code Gross cpm Net cpm dpm/100 cm2 Results (dpm/100 cm2)

L310218CSFCTBE001 3.99E+02 1.18E+02 8.23E+02 8.23E+02 L310218CSFCTBE002 3.91E+02 1.10E+02 7.67E+02 7.67E+02 L310218CSFCTBE003 4.13E+02 1.32E+02 9.21E+02 9.21E+02 L310218CSFCTBE004 4.26E+02 1.45E+02 1.01E+03 1.01E+03 L310218CSFCTBE005 3.92E+02 1.11E+02 7.74E+02 7.74E+02 L310218CSFCTBE006 4.27E+02 1.46E+02 1.02E+03 1.02E+03 L310218CSFCTBE007 3.64E+02 8.30E+01 5.79E+02 5.79E+02 L310218CSFCTBE008 3.54E+02 7.30E+02 5.09E+02 5.09E+02 L310218CSFCTBE009 3.75E+02 9.40E+01 6.56E+02 6.56E+02 L310218CSFCTBE010 3.92E+02 1.11E+02 7.74E+02 7.74E+02 L310218CSFCTBE011 3.01E+02 2.00E+01 1.40E+02 4.22E+02 L310218CSFCTBE012 3.74E+02 9.30E+01 6.49E+02 6.49E+02 L310218CSFCTBE013 4.08E+02 1.27E+02 8.86E+02 8.86E+02 L310218CSFCTBE014 3.82E+02 1.01E+02 7.04E+02 7.04E+02 L310218CDFCTBE014 3.38E+02 5.70E+01 3.98E+02 3.98E+02 L310218CSFCTBE015 4.03E+02 1.22E+02 8.51E+02 8.51E+02 L310218CSFCTB\E016 3.68E+02 8.70E+02 6.07E+02 6.07E+02 L310218CSFCTBE017 4.23E+02 1.42E+02 9.90E+02 9.90E+02 L310218CSFCTBE018 4.26E+02 1.45E+02 1.01E+03 1.01E+03 L310218CSFCTBE019 3.80E+02 9.90E+01 6.90E+02 6.90E+02 L310218CSFCTBE020 3.52E+02 7.1E+01 4.95E+02 4.95E+02 Direct beta measurements ranged from <4.22E+02 to 1.01E+03 dpm/100 cm2. The mean concentration was 7.41E+02 dpm/100 cm2.

Generic gross betas DCGLs for surfaces were derived using the 10CFR61 radionuclide results associated with the Zion Station DAW mixture. The NRC screening level DCGL values were obtained from NUREG-5512 Volume 3 Table 5.19 and are consistent with those found in NUREG-1757 Volume 1, Appendix H-1. There are three separate DAW results for Zion Station represents Unit 1, Unit 2 and the Auxiliary Building. The nuclide fraction Co-60 varies significantly between these structures resulting in wide variations in the DCGL for each area. The most conservative gross beta DCGL was 7.30E+03 dpm/100 cm2 and reflects the C0-60 nuclide fraction dominance (87-92% of the normalized mixture) observed for Unit 2 and the Auxiliary Building. This gross beta DCGL derived from the most conservative DAW waste stream is used to examine the direct beta measurements from SU10218C (Asphalt Roadway). The average gross beta measurement from SU10218E is 10.2% of the generic DCGL. The maximum observed gross beta measurement from SU10218E is 14.0% of the generic DCGL.

28

Figure 1-10 SU10218E Hazardous Waste Storage Pad (27 X 42)

Direct Measurement Locations 29

Direct Beta Measurement Duplicate Sample A duplicate direct beta measurement was acquired for sample location L310218CDFCTBE014 (L310218CDFCTBE014). The duplicate sample was randomly selected. The duplicate sample evaluation method is provided in Section 4.2.2 of the ZionSolutions Quality Assurance Project Plan (for Characterization and FSS). The evaluation results for the samples are provided in Table 1-15. The sample comparison for the direct measurement subjected for duplicate sample evaluation passed the test criteria.

Table 1-15 Duplicate Sample Comparison Location Code Gross cpm Net cpm dpm/100 cm2 L310218CSFCTBE014 3.82E+02 1.01E+02 7.04E+02 L310218CDFCTBE014 3.38E+02 5.70E+01 3.98E+02 Sigma: 2.76E+02 Resolution: <4.0 Acceptance Ratio: 0.4-2.5 Calculated Acceptance Value: 1.77 Result: Passed Concrete Core Sampling Three concrete core samples were acquired from SU10218E. The cores consisted of concrete from the pad surface to a depth of 15 cm. The cores had been collected during earlier MARSAME survey operations conducted in the area. Vendor gamma spectroscopy results for SU10218E Concrete cores are provided in Attachment 1-10 for the following radionuclides: Ac-228, Am-241, Co-60, Cs-134, Cs-137, Eu-154, Eu-155, I-129, K-40, Pb-214, Tl-208 and U-235. No plant-derived activity was observed. The maximum Cs-137 result for the concrete cores was 6.18-02 pCi/g. Duplicate samples were not collected for these cores.

Summary The survey design for the ISFSI construction area focused primarily on the surface and subsurface soil associated within the region. The characterization survey was designed to meet the general requirements of a final status survey in accordance with NUREG-1575 Rev. 1, the Multi-Agency Radiation Survey and Site Investigation Manual (MARSSIM). Because spent fuel will be stored on the ISFSI and following its removal in the far future MARSSIM or similar type surveys will be required to release the ISFSI site.

The surveys provided in this report provide strong evidence that no residual plant-derive radioactivity is present in the ISFSI area. Further, if the NRC screening values for surfaces and soil published in NUREG-1757 V2 R1 Appendix H Tables H-1 and H-2 are used to evaluate the survey results the ISFSI region would readily meet that release criteria. It should be noted that the screening values found in NUREG-1757V2R1 are conservative relative to the expected DCGLs that will be developed for unrestricted release and license termination of the Zion Nuclear Power Station.

30

References USNRC, NUREG-1575, Multi-Agency Radiation Survey and Site Investigation Manual (MARSSIM)

Rev 1, 2000.

USNRC, NUREG-1757, Consolidated Decommissioning Guidance, Characterization, Surveys and Determination of Radiological Criteria Vol. 2 Rev. 1, September 2006.

Eberline Analytical Laboratory, Oak Ridge, TN. Report of Analysis WO 11-12022 Feb 2012 Eberline Analytical Laboratory, Oak Ridge, TN. Report of Analysis WO 11-12025 Feb 2012 Eberline Analytical Laboratory, Oak Ridge, TN. Report of Analysis WO 11-12051 Feb 2012 Eberline Analytical Laboratory, Oak Ridge, TN. Report of Analysis WO 11-12063 Feb 2012 Eberline Analytical Laboratory, Oak Ridge, TN. Report of Analysis WO 11-12071 Feb 2012 Eberline Analytical Laboratory, Oak Ridge, TN. Report of Analysis WO 11-12076 Feb 2012 Eberline Analytical Laboratory, Oak Ridge, TN. Report of Analysis WO 11-12080 Feb 2012 Eberline Analytical Laboratory, Oak Ridge, TN. Report of Analysis WO 11-12083 Feb 2012 Eberline Analytical Laboratory, Oak Ridge, TN. Report of Analysis WO 11-12085 Feb 2012 TSD-004, Ludlum Model 44-10 Detector Sensitivity, Revision 0, ZionSolutions, EH&S Technical Basis Document, 1/30/12 31

Attachment 1-1 CHARACTERIZATION SURVEY PLAN FOR THE ZION STATION INDEPENDENT SITE FUEL STORAGE FACILITY (ISFSI) 1

CHARACTERIZATION SURVEY PLAN FOR THE ZION STATION INDEPENDENT SITE FUEL STORAGE FACILITY (ISFSI)

November 2, 2011 Prepared By: _________________________________________ Date: _______________

Bob Decker Reviewed By: _________________________________________ Date: ________________

Doug Schult, CHP Approved By: _________________________________________ Date: ________________

Steve Horvath 2

Table of Contents 1.0 Introduction ...................................................................................................................................... 1 2.0 Scope ................................................................................................................................................. 1 3.0 Organization...................................................................................................................................... 4 4.0 Data Quality Objective.................................................................................................................... 4 4.1 Problem Description........................................................................................................... 4 4.2 Decision Identification ......... 5 4.3 Inputs to Decision ............................................................................................................... 5 4.4 Boundary of the Study ....................................................................................................... 5 4.5 Decision Rule....................................................................................................................... 5 4.6 Limit of Decision Error ...................................................................................................... 6 4.7 Design for Data Collection ................................................................................................. 6 5.0 Radionuclides of Concern ............................................................................................................... 7 6.0 Survey Area...................................................................................................................................... 7 7.0 Survey Design and Methodology .................................................................................................... 8 7.1 Land Surveys ...................................................................................................................... 9 7.2 Structure, Asphalt and Other Media Surveys ............................................................... 10 7.3 Survey Packages .............................................................................................................. 11 8.0 Sampling Methodology ................................................................................................................. 11 8.1 Surface Soil Samples ........................................................................................................ 13 8.2 Subsurface Soil Samples .................................................................................................. 14 9.0 Instrumentation ............................................................................................................................. 15 10.0 Sample Handling and Analysis ....................................................................................................... 16 11.0 Minimum Detectable Concentrations .......................................................................................... 16 11.1 Surface MDC .................................................................................................................... 17 11.2 Action Level for Surfaces................................................................................................. 17 11.4 Direct Measurement MDC................................................................................................. 17 11.5 Gamma Scan MDC................................................................................................................ 18 12.0 Quality Assurance and Quality Control ...................................................................................... 18 12.1 Plans and Procedures ....................................................................................................... 19 12.2 Training ............................................................................................................................. 19 12.3 Instrument Selection, Calibration and Operation ......................................................... 19 12.4 Duplicate Samples ............................................................................................................ 19 12.5 Chain of Custody .............................................................................................................. 20 12.6 Duplicate Review of Survey Results ............................................................................... 20 3

13.0 Characterization Survey Data ...................................................................................................... 20 14.0 Attachments ................................................................................................................................... 21 15.0 References ...................................................................................................................................... 22 4

1.0 Introduction The Zion Nuclear Station is located in the city of Zion, in northeast Illinois, on the western shore of Lake Michigan. The station consisted of 2 pressurized water reactors supplied by Westinghouse. On January 15, 1998 it was announced that the Zion Nuclear Station had been permanently shut down. On March 9, 1998 certification was provided to the Nuclear Regulatory Commission, NRC, that all fuel assemblies had been permanently removed from the reactor vessels and transferred to the spent fuel pool. As a result the 10CFR50 license for the Zion Station was amended to no longer authorize reactor operation or the placement of fuel within the reactor vessels. The Zion Station was placed in a SAFESTOR condition while waiting decommissioning. On January 1, 2010 the Zion Station license was transferred to ZionSolutions LLC a subsidiary of EnergySolutions LLC in order proceed with decommissioning activities and ultimate license termination.

As part of the Zion Station Remediation Project (ZSRP) all reactor fuel and greater than Class C waste will be loaded into casks and transferred to an Independent Spent Fuel Storage Installation, ISFSI, to be constructed at the Zion Station. It is expected that the fuel will remain in dry storage within the ISFSI until it is transferred to the Department of Energy (DOE). The ISFSI will be constructed in the southwest corner of the Zion Nuclear Station, immediately south of the switchyard. Figure 1-1 presents the approximate location.

In order to determine the radiological status of the area to be impacted by the construction of the ISFSI this characterization survey plan will be implemented and the results documented. The characterization survey will focus primarily on surface and subsurface soils. It is intended that the characterization survey be designed to meet the general requirements of a final status survey designed in accordance with the guidance contained in the MARSSIM as the area will be unavailable for this type of survey once the ISFSI is constructed.

2.0 Scope Figure 1-1 shows the approximate location of the ISFSI. Surrounding the ISFSI will be a Vehicle Barrier System, (VBS), which will consist of soil approximately 4 feet high and 5 feet wide.

Surrounding the VBS will be a buffer zone approximately 20 feet wide. The scope of this characterization will include the area within the buffer zone. Where possible, the boundaries of the area to be characterized will be defined by site features such as the Switchyard fence to the north and the restricted area fence to the west. The boundaries of the area to be characterized were surveyed with a global positioning satellite (GPS) device. The resulting coordinates were then used to prepare Figure 2-1.

Currently there are two concrete pads in the area to be characterized, along with two portable buildings, numerous concrete structures/blocks, miscellaneous materials and equipment, and several piles of debris. Prior to initiating the characterization survey these items will be removed.

The Portable buildings are intended to be removed from the area for later disposition following MARSAME surveys.

Figure 1-1 ISFSI Survey Locations Current plans call for the asphalt road/driveway immediately south of the Switchyard fence, to remain following the completion of decommissioning activities.

The west end and southwest corner of the area to be characterized is heavily vegetated. All vegetation and trees less than 6 inches in diameter will also be removed prior to initiating the characterization survey.

Within the area to be characterized the survey will focus on both surface (0 to 15 cm) and subsurface (15 to 100 cm) soils. The survey will consist of gamma scans and the collection of soil samples for analysis. The initial soil sampling locations will be defined based on a systematic design to ensure an unbiased and uniform survey. Biased sampling locations may be identified 6

based on the gamma scanning results or based on the intuition of those conducting the characterization survey. Investigatory sampling may be required based on the initial sampling results.

Figure 2-1 ISFSI Systematic Soil Sample Locations 7

3.0 Organization The characterization of the area to be impacted by the ISFSI will be performed under the direction of the Zion Solution Characterization/License Termination Manager. Radiological Engineers/Health Physicists reporting to the Characterization/License Termination Manager have prepared this plan, will oversee the implementation of the plan, and prepare a final report documenting the results of the characterization survey. Radiation Protection Technicians reporting to the Characterization/License Termination Manager may assist in the implementation of the characterization survey.

A Radiological Engineer/Supervisor from EnergySolutions Commercial Services Group will implement the Characterization Survey Plan. The Radiation Protection Technician support, instrumentation, and procedures required to implement the plan will be provided by the Commercial Services Group. The Commercial Services Group will also be responsible for managing contracts with the vendors used to support this characterization effort.

It is anticipated that two vendors will be required to support this characterization effort. One vendor will be responsible for providing onsite support for coring and direct push activities associated with sample collection. The other vendor will be responsible for the offsite analyses of collected samples.

4.0 Data Quality Objectives The objective of this characterization survey is to perform a radiological characterization of the area to be impacted by the construction of the ISFSI. Once the ISFSI is constructed and the fuel and greater than Class C waste transferred to the ISFSI it will not be possible to perform this type of survey. It is intended that this survey will meet the minimum requirements of a final status survey designed in accordance with the guidance contained in MARSSIM.

4.1 Problem Description Due to the operation of the Zion Station there is a potential for plant-derived activity in the area, primarily fission and activation products resulting from site operations. Prior to the construction of the ISFSI at the Zion Station there is a need to determine and document the radiological status of the area that will be impacted by the construction. It is intended that the characterization surveys to be performed will meet the minimum requirements of a final status survey designed in accordance with the guidance in the MARSSIM as the area will be unavailable for a final status survey once the ISFSI is constructed.

If radiological contamination should be identified in the area to be impacted by the construction of the ISFSI, radionuclide specific analyses will be used to identify the radionuclides present, the activity concentration of each radionuclide present, and the relative fractions of each of the radionuclides present. Biased sampling will be used to bound potential areas of contamination and determine its distribution as a function of depth beneath the surface.

8

4.2 Decision Identification The intent of the characterization survey is to provide the data necessary to document the current radiological status of the area to be impacted by the construction of the ISFSI.

Ideally, the conclusion of the survey will be that the area is not radiologically contaminated. However, if licensed radionuclides are identified, then their activity concentrations will be determined as will their distribution within the area.

4.3 Inputs to the Decision The characterization survey will consist of both qualitative evaluations and quantitative analysis results. The qualitative evaluations will consist of gamma scans. Gamma scanning sensitivities or minimum detectable activities, MDCs, will be estimated based on an assumed geometry and radionuclide mix. Qualitative analysis results will be available from radionuclide specific analysis results using a calibrated counting geometry. Analysis times will be set to achieve the required MDCs.

Initially all samples will be analyzed for gamma emitting radionuclides by gamma spectroscopy A minimum of 10% of all samples collected will be analyzed for Fe-55, Ni-63, and Sr-90.

In addition, any gamma spectroscopy analysis that identifies plant-derived radionuclides in excess of the MDC will be analyzed for Fe-55, Ni-63, and Sr-90.

4.4 Boundaries of the Study This characterization survey will cover the area to be impacted by the construction of the ISFSI. The area is in the southwest corner of the Zion Nuclear Station, immediately south of the Switchyard. Figure 2-1 shows the area to be surveyed. The survey will include surveys of surface (0-15 cm) soils, subsurface (15 to 100cm) soils, and an asphalt road way.

4.5 Decision Rule Initially the sample analysis results associated with plant-derived activity will be compared to the minimum detectable activity associated with each of the analyses to determine if radioactivity was detected in the sample. If radioactivity is detected an evaluation will be made to determine if the radionuclide detected is present in background and if the radionuclide specific activity concentration exceeds the expected background activity concentration. If necessary a material specific (surface soil, subsurface soil, asphalt, etc.) background activity concentrations may be obtained to aid in the evaluation.

Sample analysis results for plant-derived activity that exceed the MDC will be reviewed to ensure that the sample was analyzed for all of the required radionuclides and that the appropriate number of samples was collected to properly bound potential areas of contamination.

9

4.6 Limits on Decision Error Decision errors will be limited by performing the characterization survey in accordance with this plan which specifies the:

• Types of surveys to be performed.

• Instrumentation to be used.

• Number and types of samples to be collected.

• Sample locations.

• Radionuclides to be analyzed.

• Required MDC.

• Decision rules for accessing the data.

• Level of oversight to be provided.

4.7 Design for Data Collection To facilitate data collection, review and evaluation the area to be surveyed will be divided into survey units. Survey packages will be prepared for each survey unit. The survey packages will include:

• A description of the survey unit.

• Provide survey and sampling instructions

• Specify the instrumentation to be used.

• Specify sampling locations.

• Provide sample identification codes for labeling and tracking the samples.

The survey will consist of gamma scans and sampling. Gamma scans will be performed over approximately 50% of the accessible areas and a minimum of 30 systematic sampling locations will be specified in each survey unit. At each sampling location both a surface and subsurface sample will be collected. Samples will be sent to an offsite laboratory for analysis. All samples will be analyzed for gamma emitting radionuclides by gamma spectroscopy. A minimum of 10 percent of the samples will also be analyzed for Fe-55, Ni-63, and Sr-90.

10

5.0 Radionuclides of Concern The predominant observable plant-derived radionuclides found at the Zion Station Remediation Project (ZSRP) are Co-60 and Cs-137. At other power reactor decommissioning sites Cs-137 has been the dominant radionuclide. Other radionuclides may be present in the ZSRP soils including hard to-detect (HTD) radionuclides. These latter radionuclides (Fe-55, Ni-63, Sr-90, etc.)

typically contribute to less than ten percent of the soil radionuclide mixture (and less than 5.0 percent of the dose) and are found in the presence of the mixtures principle radionuclides (Co-60 and Cs-137).

6.0 Survey Area The region designated for the ISFSI is located in survey units 10208, 10218, 10219 102020 and 10221 as defined in the Zion Historical Site Assessment (HSA). The HSA survey unit (SU) descriptions are noted in Table 6-1. Figure 6-1 illustrates the proposed survey region relative to the above survey units.

Figure 6-1 HSA Land Survey Units and Initial Classification The ISFSI region is delineated by the imposed borders. The survey region comprises 23,118 m2 and will be divided into two survey units. The HSA classified the region as a Class 3 survey unit.

If discoveries are made that warrant changing the classification the conditions will be 11

appropriately documented and adjustments made to accommodate any necessary changes to survey design.

Prior to performing the surveys GPS measurements were made to establish the survey unit boundaries (See Figure 2-1). GPS measurements will also be acquired at the Zion site 2000N 2000W Baseline marker to further establish exact coordinates relative to the survey units.

The new survey units for the ISFSI will use the Zion Survey Unit ID of 10218. The survey units and samples will be designated as illustrated in Table 6-2 using the appropriate codes for the samples or surveys acquired.

Table 6-1 HSA Survey Unit Designation Zion HSA ISFSI Survey Zion HSA Locations Area (m2)

Classification Relative Location in Survey Unit Unit ID 10208 South Warehouse Area 3 12,381 Southwest Corner 10218 Near South of ISFSI encompasses nearly all of this 3 17,822 Switchyard SU 10219 Far South of Switchyard 3 12,185 Northern edge of SU Southeast Corner of 102020 Exclusion Area 3 46,964 Northwest Corner of SU Lakeshore South Fenced Area 10221 3 27,297 Western edge of SU Lakeshore 7.0 Survey Design and Methodology The ISFSI land surveys will consist primarily of gamma scan surveys and soil samples. If structures, concrete or asphalt pads remain these locations will be scanned using beta sensitive detectors and direct measurements will be acquired at designated locations. Because debris piles were located in some areas of the survey region additional biased or judgmental samples will be acquired from these locations. Instrument measurement results are assigned sample codes as noted in Table 6-2. The sample code designations are provided in Attachment 14-1 7.1 Land Surveys Land surveys will consist of 50% scan coverage of each survey unit. Judgmental and bias scans will be conducted of debris pile locations, any pads and structure footprints (assuming the material has been removed from the region Land surveys will be conducted using 5.08 by 5.08 cm (2.0 by 2.0 inches) NaI detectors coupled to a Ludlum 2350-1 data logging instrument. When using the NaI detector in scanning mode the instrument time constant will be set to one second and the response time to fast. The detector should be maintained at a constant distance from the survey 12

surface (detector end-cap one to two inches from the soil surface). The scan speed will be 0.25 m/s (~10 inches/s). The scan MDC is 4.16 pCi/g Cs-137.

Note Other detector to surface distances and scan speeds may be used provided that an MDC of 4.16 pCi/g of Cs-137 can be detected.

7.1.1 Gamma scans will include the surveyor listening for an audible change (increase) in the instruments count rate during the scan operation. If the survey area is subject to high noise the use of earphones must be considered. Considerations for conducting audible surveys and responding to increased count rates may include, but is not limited to, slowing the scan speed over the area where the increasing count rate was detected, defining the region of increased count rate and flagging the area for further investigation.

7.1.2 Alarm set points will be used and variations in the local survey area background evaluated, as necessary alarm set points will be adjusted for regions of significant variations (regional background variations of +/-2000 cpm will require new alarm settings). If an alarm is triggered the surveyor should stop the survey, reset the alarm and return to the surface region where the alarm occurred. The region should be re-surveyed without changing the survey performance methodology. Survey speed, detector geometry, alarm set point, and technician should all remain consistent. If the alarm condition is not repeated the surveyor should continue with the survey. If the alarm condition is repeated the surveyor should, note the location and the maximum reading. If locating the alarm area is challenging, flag or otherwise mark the area.

Notify the Radiological Engineer responsible for the ISFSI surveys or the Characterization/License Termination Manager.

7.1.3 If Backpack-GPS gamma scans are conducted the instrument must be capable of detecting 4.16 pCi/g Cs-137. If the surveyor detects a change in count rate during the scan operation that is indicative of an elevated area the location is to be marked for later investigations.

7.2 Structure, Asphalt and Other Media Surveys If structures, asphalt or other similar media exist in the survey area the items will be surveyed using beta scanning and direct measurement techniques. Media samples may be acquired from the pad or structure and consideration given to the collection of media (soils) beneath and immediately adjacent to the pad or structure. Structures or pads will require a separate survey package and be treated as a separate survey unit. More than one pad may be included in a single survey unit.

13

7.2.1 Asphalt Roadway The asphalt roadway adjacent to the Switchyard comprises approximately 700 m2 in area. A For each survey unit a total of 20 percent of the roadway area will be subjected to beta scans surveys. Asphalt sampling is based on the systematic sample locations discussed in Section 8.0. A For each survey unit a total of 20 systematic direct (static) beta measurements will be acquired from the asphalt roadway. The asphalt roadway will be mapped using GPS coordinates and the systematic locations for direct beta measurements will be entered on the map.

These locations may be located on the asphalt surface prior to performing the surveys.

7.2.2 Beta Scan Surveys Beta scans will be performed on asphalt and concrete surfaces to determine if any elevated areas exist. Areas exhibiting count rates in excess of background will be bounded and direct measurements acquired. Samples of the asphalt or other media will be acquired from locations where elevated activity is detected. Beta scanning will be performed at a speed not exceeding one detector window width per second.

Instrumentation may include using beta scintillation or gas-flow proportional detectors.

7.2.3 Direct Beta Measurement Surveys Direct beta (static) measurements will be acquired from systematic locations on structures, asphalt or pad.

7.3 Survey Packages A survey package will be prepared for each survey unit and contain the following information:

• A description of the survey unit.

• The boundaries of the survey unit.

• Instrumentation and detectors including instrument setup details.

• Detailed survey instructions such as, instrument and detector type, scan speed, direct measurement count time, pre and post source check requirements.

• The number, location and type of measurements or samples to be acquired.

• Any action levels or alarm set points

• Sampling codes.

• Any abnormal conditions or safety concerns.

• Any prerequisites that is required prior to sampling or surveys.

• Any individual contact information required prior to or during surveys.

Survey results will be reviewed and summarized for each survey unit and include:

• Identification of surface contamination levels.

• Sample results above any designated action levels.

• Survey results for each direct measurement location.

• Results of each gamma scan grid.

14

• Backgrounds used (determined) for gamma scanning measurements.

• Findings from any investigations performed (separate survey package).

• Instrument alarm findings

• Statistical data if generated.

• The instrument and detector serial numbers used for the surveys.

• Copies of the survey instrument calibration records.

• Copies of the daily source checks and background determination.

• An electronic copy of the raw data collected from instrument downloads.

8.0 Sampling Methodology Multiple sample types will be collected as part of the characterization surveys. This will include systematic samples of surface (0 .0 to 15 cm), subsurface (15 to 100 cm) soils and asphalt.

Depending on the systematic sampling results, gamma scanning results, or surveyor intuition biased samples may also be collected. The biased samples could include surface soils, subsurface soils, asphalt, and miscellaneous debris identified during the ISFSI area surveys. For all samples a minimum of 0.5 liter volume of soil will be collected at each location (~700 g). As necessary, more than one sample may be collected at the same location in order to meet the sample volume requirements. If a second sample is required the sample location should be adjacent and no more than one meter radius of the original sample collection point.

The systematic sampling locations for soil are shown in Figure 2-1. Table 8-1 list the GPS coordinates of each of the systematic sampling locations. The soil sampling locations will be located using the GPS coordinates and a GPS device. If a sample cannot be acquired at a specific location due to structural or utility interferences then the sample locations will be adjusted and the new locations documented.

Table 8-1 Sample Numbers and GPS Coordinates Survey Unit Sample Number* Northing Easting 10218 L310218CSGSSS-A001 343443.8874 641477.2629 10218 L310218CSGSSS -A002 343464.9800 641477.2629 10218 L310218CSGSSS-A003 343412.2485 641495.5296 10218 L310218CSGSSS-A004 343433.3411 641495.5296 10218 L310218CSGSSS-A005 343454.4337 641495.5296 10218 L310218CSGSSS-A006 343401.7022 641513.7963 10218 L310218CSGSSS-A007 343422.7948 641513.7963 10218 L310218CSGSSS-A008 343443.8874 641513.7963 10218 L310218CSGSSS -A009 343464.9800 641513.7963 10218 L310218CSGSSS-A010 343412.2485 641532.0630 10218 L310218CSGSSS -A011 343433.3411 641532.0630 10218 L310218CSGSSS -A012 343454.4337 641532.0630 10218 L310218CSGSSS -A013 343475.5263 641532.0630 10218 L310218CSGSSS-A014 343401.7022 641550.3298 15

Survey Unit Sample Number* Northing Easting 10218 L310218CSGSSS-A015 343422.7948 641550.3298 10218 L310218CSGSSS-A016 343443.8874 641550.3298 10218 L310218CSGSSS-A017 343464.9800 641550.3298 10218 L310218CSGSSS-A018 343412.2485 641568.5965 10218 L310218CSGSSS-A019 343433.3411 641568.5965 10218 L310218CSGSSS-A020 343454.4337 641568.5965 10218 L310218CSGSSS-A021 343475.5263 641568.5965 10218 L310218CSGSSS-A022 343401.7022 641586.8632 10218 L310218CSGSSS-A023 343422.7948 641586.8632 10218 L310218CSGSSS-A024 343443.8874 641586.8632 10218 L310218CSGSSS-A025 343464.9800 641586.8632 10218 L310218CSGSSS-A026 343412.2485 641605.1299 10218 L310218CSGSSS-A027 343433.3411 641605.1299 10218 L310218CSGSSS-A028 343454.4337 641605.1299 10218 L310218CSGSSS-A029 343401.7022 641623.3966 10218 L310218CSGSSS-A030 343422.7948 641623.3966 10218 L310218CSGSSS-B001 343371.5443 641500.8511 10218 L310218CSGSSS-B002 343392.6373 641500.8511 10218 L310218CSGSSS-B003 343318.8117 641519.1182 10218 L310218CSGSSS-B004 343339.9047 641519.1182 10218 L310218CSGSSS-B005 343360.9978 641519.1182 10218 L310218CSGSSS-B006 343382.0908 641519.1182 10218 L310218CSGSSS-B007 343308.2652 641537.3853 10218 L310218CSGSSS-B008 343329.3582 641537.3853 10218 L310218CSGSSS-B009 343350.4512 641537.3853 10218 L310218CSGSSS-B010 343371.5443 641537.3853 10218 L310218CSGSSS-B011 343392.6373 641537.3853 10218 L310218CSGSSS-B012 343318.8117 641555.6524 10218 L310218CSGSSS-B013 343339.9047 641555.6524 10218 L310218CSGSSS-B014 343360.9978 641555.6524 10218 L310218CSGSSS-B015 343382.0908 641555.6524 10218 L310218CSGSSS-B016 343329.3582 641573.9195 10218 L310218CSGSSS-B017 343350.4512 641573.9195 10218 L310218CSGSSS-B018 343371.5443 641573.9195 10218 L310218CSGSSS-B019 343392.6373 641573.9195 10218 L310218CSGSSS-B020 343318.8117 641592.1866 10218 L310218CSGSSS-B021 343339.9047 641592.1866 10218 L310218CSGSSS-B022 343360.9978 641592.1866 10218 L310218CSGSSS-B023 343382.0908 641592.1866 10218 L310218CSGSSS-B024 343329.3582 641610.4537 10218 L310218CSGSSS-B025 343350.4512 641610.4537 16

Survey Unit Sample Number* Northing Easting 10218 L310218CSGSSS-B026 343371.5443 641610.4537 10218 L310218CSGSSS-B027 343392.6373 641610.4537 10218 L310218CSGSSS-B028 343339.9047 641628.7208 10218 L310218CSGSSS-B029 343360.9978 641628.7208 10218 L310218CSGSSS-B030 343382.0908 641628.7208

• Subsurface sample numbers are not included in the above table. Their locations will be the same as the surface soil location. The sample codes will be L310218CSGSSB-A001 through A030 and L310218CSGSSB-B001 through B030.

8.1 Surface Soil Samples A total of 30 systematic surface soil samples will be collected from each survey unit.

Each sample will be collected from a one meter square area horizontal composite to a depth of 15 cm. Surface soil samples (0-15 cm) and samples of any miscellaneous debris will be collected using trowels and similar tools. Surface soil samples will be collected in a manner that excludes the inclusion of vegetation, debris, rocks and other foreign media.

If significant root stock is present the root stock should be removed from the soil mixture prior to counting. Samples may be field sieved prior to packaging using a size 6 or 8 gauge screen.

8.1.1. Large cobble, debris, gravels or other media contained in the sample will be surveyed prior to discarding. The sample should be inspected for other debris such as rust, metals, processed woods or similar media. If debris other than soils is observed it should be noted on the sample collection log or form. All debris discarded shall be surveyed using both beta and gamma sensitive instruments. The survey results are documented and any suspect media preserved for further investigation. The soil sample should also be surveyed using a gamma sensitive detector. Positive survey results above the established detector background should be noted and the sample marked for on-site gamma analysis. All positive survey results will require notification of the ZSRP Radiological Engineer for the ISFSI project or the Characterization/License Termination Manager.

8.2 Subsurface Soil Samples A total of 30 subsurface soil samples will be collected from each survey unit. Subsurface soil samples (15 cm-100 cm) will be collected using a direct push sampling device approximately 2 inches in diameter. The subsurface soil sample will normally be collected from the same location as the surface soil or immediately adjacent to the location. If the subsurface soil sample is collected adjacent to the hole then the top 15 cm of sample should be removed prior to using the push tube. Also see Section 8.1.1.

8.2.1. If a push-tube sample encounters refusal i.e. subsurface media is not collected in the sample tube; additional attempts may be made within one meter radius of the 17

original location. Refusal of any samples will be noted on the sample collection log or form.

8.2.2. The catchers on the ends of direct push samplers and the plastic sample sleeves will be replaced after each push.

8.2.3. Subsurface soil samples may be collected from judgmental and bias locations where debris piles, pads, structures or topographic features are indicative of locations where potential contaminants could reside or have been deposited. Subsurface soils may also be collected in concert with surface soils samples from areas identified as elevated areas due to confirmed elevated gamma scanning measurements.

The location of any biased sampling locations should be marked on an appropriate map.

The coordinates of the biased sampling location should be recorded using a GPS device.

Collection of biased samples should also consider topographic features where runoff, low points and depressions are located.

8.3 Confirmed land survey locations of increased count rates or instrument alarms during scanning surveys will require investigations to be performed. These investigations will require a separate investigation survey package outlining the requirements of the investigation, surveys to be performed and the samples to be collected.

8.4 Asphalt or similar media samples will be collected by coring the media with a coring tool approximately 6 inches in diameter. A one-half liter sample volume (~700 g) should be collected. If systematic soil samples locations include the asphalt roadway, samples of the asphalt roadway (asphalt or concrete) will be required. In addition, a subsurface soil sample will be collected at the same location. Also see section 8.1.

8.5 All sampling tools will be clean prior to use. If necessary, the tools can be cleaned using damp rags, paper towels, putty knifes, wire brushes and similar tools. If conditions warrant, disposable trowels may be used.

8.6 Each sample collected will consist of approximately 0.5 liters of material placed in a 1.0 gallon labeled freezer bag or equivalent and packaged for shipment to an offsite laboratory for analysis. As the samples are collected a sample log will be maintained which provides for each sample collected The log will include:

• Sample ID number

• Sample type (surface soil, subsurface soil, asphalt, etc.)

• Date and time collected

• Name of the Health Physics Technician collecting the sample

• Any other information deemed appropriate at the time of sample collection.

8.7 Prior to shipping the samples to the offsite laboratory chain of custody forms (COC), will be prepared transferring custody of the samples to the offsite laboratory. The COCs will 18

specify the analyses to be performed on each sample and the requested turnaround time for each sample analysis, and to whom the sample analyses should be forwarded.

9.0 Instrumentation Survey instruments and detectors are to be selected based on the energy and type of radiation anticipated in the survey area. The principle radionuclides are Co-60 and Cs-137 (see Section 5.0).

The survey instrument to be used will be the Ludlum 2350-1 data logger. Section 7.1 provides features and settings that will require careful consideration for performing gamma surveys. The detector to be used for gamma scans will be a 5.08 by 5.08 cm NaI (Ludlum Model 44-10 or equivalent). Because the MDC requirement is low (4.16 pCi/g) the normal scan speed (0.5 m/s) may be required to be reduced by fifty percent and the detector distance to the survey surface may also require adjustment.

For surveying structures, asphalt or concrete surfaces the Ludlum 2350-1 instrument will be coupled to either a Model 43-37 or 43-68 gas-flow proportional detectors. The former is a large area detector (584 cm2) floor monitor and the latter is a 126 cm2 hand-held detector. Other beta sensitive detectors may also be used including the Ludlum 43-93 phoswich detector.

The beta sensitive detectors should be calibrated and source checked using a NIST traceable source with beta energies comparable to the principle radionuclides expected to be encountered.

Tc-99 is an acceptable source.

The gamma sensitive instruments should be calibrated and source checked using a check source with gamma energies comparable to the principle radionuclides expected to be encountered. Cs-137 is an acceptable source.

Copies of the source certificates will be included in the report. Daily pre and post survey source checks will be provided for each instrument and detector that is used for ISFSI surveys.

10.0 Sample Handling and Analysis As the samples are collected they will be placed in pre labeled sample containers (1 gallon freezer bags or equivalent). The samples containers will be labeled with individual sample numbers in accordance with the protocol provided in Section 8.0, Table 8-1. For other samples and measurements that may be acquired the protocol found in Attachment 14-1 is used.

Once a Chain of Custody (COC) has been completed the samples will be sent to an offsite laboratory for analysis. The soil samples will be dried and homogenized prior to analysis. Asphalt and debris samples will be homogenized to the extent practical.

All samples will be analyzed by gamma spectroscopy and minimum of 10% of the samples will also be analyzed for Fe-55, Ni-63, and Sr-90. Depending of the sample analysis results, additional samples may also be analyzed for Fe-55, Ni-63, and Sr-90. The offsite laboratory will be 19

instructed to hold the samples for a minimum of 180 days following sample analysis before disposing of them.

11.0 Minimum Detectable Concentration The MDC for beta scanning, direct beta measurements and gamma scanning are provided in Table 11-1.

Table 11-1 Minimum Detectable Concentrations Measurement Type MDC (dpm/100 cm2)

Direct Beta 1.00E+03 Beta Scan 4.00E+03 MDC(pCi/g)

Gamma Scan 4.16 The MDC for gamma spectroscopy and Hard-To-Detect (HTD) radionuclides analysis are listed in Table 11-2 Table 11-2 Analytical MDC Concentrations Radionuclide MDC (pCi/g)

Co-60 <0.1 Cs-137 <0.1 Fe-55 <0.1 Ni-63 <0.1 Sr-90 <0.1 11.1 Beta Scanning MDC The Minimum Detectable Concentration is the detection limit (LD) multiplied by an appropriate conversion factor to give units of activity. The formula used to determine the scanning MDC at the 95% confidence level is:

Where, MDCscan = Minimum Detectable Concentration in dpm/100 cm2 d = index of sensitivity (1.38) bi = background counts per observation interval t = total efficiency p = surveyor efficiency (0.5)

A = detector area in cm2 (not to exceed 126 cm2) 20

The scan speed is based on one detector window width per second however; other scan speeds may be used. For the Ludlum Model 43-68 gas flow proportional detector the window width is 8.8 cm resulting in a scan speed of ~3.5 inches per second. The floor monitor detector is the Ludlum Model 43-37 with a window width of 13.35 cm results in a scan speed of 5.25 inches per second.

11.2 Direct Beta Measurement MDC Direct (static) measurements utilize the following formula:

Where, MDCstatic = Direct (static) measurement MDC in dpm/100 cm2 ts = sample count time tb = background count time Rb = rate of the background (cpm) t = total efficiency A = detector window area (cm2) 11.3 Gamma Scan MDC The gamma scan MDC is discussed in detail in Draft TSD-2011-004, Ludlum Model 44-10 Detector Sensitivity. This Technical Support Document (TSD) examines the gamma sensitivity for 5.08 by 5.08 cm NaI detectors to several radionuclide mixtures of Co-60 and Cs-137 using sand (SiO2) as the soil base. The TSD derives the MDC for the radionuclide mixtures at various detector distances and scan speeds. The TSD model uses essentially the same geometry configuration as the model used in NUREG 1575 (MARSSIM). TSD-2011-004 provides MDC values for the expected ZSRP soil mixture based on detector background condition, scan speed, soil depth (15 cm), soil density (1.6 g/cm3) and detector distance to the suspect surface. The Tables in Attachment 14-2, Cs-137 Scan MDC shows the gamma scan MDC for various background levels where Cs-137 comprises 100 percent of the mixture (or assumed as the surrogate radionuclide).

The parameters are based on a scan speed of 0.25 m/s with the detector end-cap 1.0 to 5 inches from the soil surface. Other parameters are included in the tables.

Based on Attachment 14-2 Table 14-2A for detector background levels of 6.0E+03 to 1.20E+4 cpm the MDC ranges from ~2.8 to 3.95 pCi/g with the detector end cap 1.0 inch from the soil surface. For detector background levels of 6.0E+03 to 1.20E+04 cpm and the end cap 3 inches from the soil surface the MDC ranges from 4.0 to 5.7 pCi/g.

Attachment 14-2 Table 14-2B shows that for a background ranging from 6.00E+03 to 1.0E+04 cpm and the end cap 3.5 inches from the ground the MDC ranges from 3.5 to 21

4.5 pCi/g. As stated earlier, other scan speeds and detector to surface distances may be used provided that the action level of 4.16 pCi/g, Cs-137 can be detected.

12.0 Quality Assurance and Quality Control Numerous assurance and quality control measures will be in place to ensure that all quality requirements related to this characterization survey will be satisfied. All activities that affect quality will be controlled by this plan. The following requirements will help ensure the quality of the results of the characterization survey.

12.1 Plans and Procedures All characterization activities affecting quality will be controlled by approved plans and procedures. In addition to this plan the following EnergySolutions implementing procedures will be used during implementation of the characterization survey.

• CS-FO-PR-001 - Performance of Radiological Surveys

• CS-FO-PR-002 - Calibration and Maintenance of Radiological Survey Instrumentation

• CS-FO-PR-003 - Soil Surveys; Collection of Water, Sediment, Vegetation, and Soil Samples; and Chain- of-Custody

• CS-FO-PR-004 - QA/QC of Portable Radiological Survey Instruments

• CS-FO-PR-005 - General Operation of Radiological Survey Instruments 12.2 Training All personnel participating in this characterization survey will receive site specific training which will include a review of the requirements of this survey plan, a review of the implementing procedures, a review of the survey packages for individual survey units, and a review of any unique features and/or hazards associated with this survey.

12.3 Instrument Selection, Calibration, and Operation The survey instrumentation selected for this characterization survey has proven reliable in the past in detecting the radionuclides of interest. All instrumentation will be calibrated using approved procedures and sources traceable to the National Institute of Standards and Technology (NIST). The minimum detectable activity associated with the use of each instrument will be documented.

Source check criteria will be established for each instrument prior to its initial use for future reference and all instrumentation will be source checked daily, prior to its use and following its use to verify proper operation.

22

12.4 Duplicate Samples A minimum of 5% of all samples to be sent off site for analysis will be split to allow for duplicate analyses. If sufficient activity concentrations are identified in the split sample analyses the results will be evaluated using NRC Inspection Procedure 84750, Radioactive Waste Treatment, And Effluent and Environmental Monitoring, 12.5 Chain of Custodies All samples sent to the offsite laboratory for analysis will be accompanied by a chain of custody (COCs) form to record who is responsible for the samples, what sample analyses is being requested, and the requested turnaround times, TATs. Upon receipt, sample analysis results will be compared to the COCs to ensure all samples were analyzed and that the correct analyses were performed.

12.6 Duplicate Review of Survey Results All survey results will be documented by the Health Physics Technician performing the survey and then reviewed by the Survey Supervisor to ensure the documentation is complete and accurate. A second review of the survey documentation will be performed by a Radiological Engineer/Health Physicist.

13.0 Characterization Survey Data Following the completion of the ISFSI surveys the data will be complied noting the results of the following:

• Radiological surveys of any structures or concrete surfaces and contain for each structure as designated by the survey package:

o A map displaying the systematic direct survey and scan locations.

o Scan survey results of each item and the percent of surfaces scanned.

o The instrumentation used to perform the surveys including calibration data, daily source checks and survey techniques (scan speed).

o Samples acquired and the on-site and/or vendor laboratory results including the MDCs requested for each radionuclide and the analysis methods used.

o A copy of the vendor laboratory QA/QC plan.

o Smear results (if any) including the instrument used, serial number and appropriate QA/QC records and calibration.

o Results of biased or judgmental surveys or samples collected including the reason(s) for acquiring the samples, locations and sampling conditions.

o All results of investigations that may have been performed to qualify surveys, local area conditions, changes in background or instrument response. This includes samples, surveys and logs that may have been collected or created.

o Raw download data if downloads were performed.

o GPS coordinates acquired during the survey process and the reason for their acquisition (relative to mapping or sample locations).

23

o Any locations of elevated survey or sample activity will be noted and bounded on a map and include the activity values and bounding conditions.

• Radiological surveys of land areas as designated by the ISFSI survey plan or established during the survey and sampling operation.

o A map displaying the scan survey region, scan locations and percent of surfaces scanned.

o The instrumentation used to perform the surveys including calibration data, daily source checks and survey techniques (scan speed and detector to surface distance).

o Samples acquired and the on-site and/or vendor laboratory results including the MDCs requested for each radionuclide and the analysis methods used.

o A copy of the vendor laboratory QA/QC plan.

o Results of biased or judgmental surveys or samples collected including the reason(s) for acquiring the samples, locations and sampling conditions.

o Any refusal sample locations and the location of additional samples acquired near the original location.

o All results of investigations that may have been performed to qualify surveys, local area conditions, changes in background or instrument response. This includes samples, surveys and logs that may have been created.

o GPS coordinates acquired during the survey process and the reason for their acquisition (relative to mapping or sample locations).

o Any locations of elevated survey or sample activity will be noted and bounded on a map and include the activity values and bounding condition.

14.0 Attachments 14.1 Sample and Measurement Unique Identification Designation Codes 14.2 Cs-137 Scan MDC for Ludlum 44-10 Detector 15.0 References 15.1 Zion Nuclear Generating Station Historical Site Assessment Summary, ComEd Decommissioning Projects, R. Akers, August 1999.

15.2 Zion Nuclear Station Draft Characterization Survey Plan, September 2011.

15.3 U.S. Nuclear Regulatory Commission, Consolidated Decommissioning Guidance, Characterization, Surveys and Determination of Radiological Criteria, NUREG-1757V2R1, September 2006.

15.4 U.S. Nuclear Regulatory Commission, A Nonparametric Statistical Methodology for the Design and Analysis of Final Status Decommissioning Surveys, NUREG-1505 Revision 1, June 1998.

15.5 U.S. Nuclear Regulatory Commission, Multi-Agency Radiation Survey and Site Investigation Manual (MARSSIM), NUREG-1575, Revision 1, August 2000, with June 2001 updates.

24

15.6 Draft Technical Support Document, Ludlum Model 44-10 Detector Sensitivity, Zion Solutions, September 2011 15.7 U.S. Nuclear Regulatory Commission, NRC Inspection Manual - Inspection Procedure 84750, Radioactive Waste Treatment, and Effluent and Environmental Monitoring, March 15, 1994.

25

Attachment 14-1 Sample and Measurement Unique Identification Designation Codes 4-1 provides the sample and measurement coding identification descriptions for labeling and identifying samples and measurements.

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12) (13) (14) (15) (16) (17)

Survey Sequence Indicator and Classification and Survey Surface Media Measurement Sample or Survey Area Unit ID Type Type Type Measurement Number Example using ISFSI coding (Survey Unit 10218) for a surface soil sample:

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12) (13) (14) (15) (16) (17)

L 3 1 0 2 1 8 C S G S S S A 0 0 1 Classification and Survey Area 1st alphanumeric indicated type of Survey Area L = Open Land Area B = Structure Type Survey S = System 2nd alphanumeric indicated Classification 1 = Class 1 2 = Class 2 3 = Class 3 4 = Non-impacted 3rd, 4th and 5th alphanumeric indicates Survey Area (The ISFSI area is designated 102) from the HSA designation 10218 Survey area number is found in the Characterization Plan.

Survey Unit Number 6th and 7th alphanumeric indicates the Survey Unit Number For the ISFSI the code is 18 Survey and Measurement Type 8th alphanumeric indicates the Survey and Measurement Type 26

B = Background S = Scoping C= Characterization R = Remediation F = FSS I = Investigation V = Verification Q = QA/QC 9th alphanumeric indicates the Type of Measurement B = Background R = Random S = Systematic J = Judgmental I = Investigation V = Verification Q = QA/QC D = Duplicate Surface Type 10th alphanumeric indicates the Type of Surface where the measurement was taken F= Floor W = Wall C = Ceiling S = System R = Roof P= Paved Road G = Ground L = Water 11th alphanumeric indicates the Material Composition where the measurement was taken C = Concrete M = Metal W = Wood B = Cinder Block K + Brick A = Asphalt S = Soil T = Tar L = Liquid Media Type 12th and 13th alphanumeric indicates the Type of Media from which the sample originated SS = Surface Soil SB = Subsurface Soil SM = Sediment WT = Water 27

LQ = Other Liquid besides water OL = Oil CV = Volumetric Concrete AV = Volumetric Asphalt MT = Metal PT = Paint SW = Smear Sample TB = Total Surface Contamination (Static) Beta Measurement TA = Total Surface Contamination (Static) Alpha Measurement GM = Gamma Measurement Sequence indicator and Sample or Measurement Number 14th alphanumeric Is the Sequence Indicator (Sequence A-J) allows the SU to be divided into 10 smaller survey units (Sequence K-Z) allows for up to 16 different survey instructions for a single survey unit.

15th, 16th and 17th alphanumeric is the three digit sequential measurement number Sequentially, 001 through 999 28

Attachment 14-2 Cs-137 Gamma Scan MDC for Ludlum 44-10 Detector Table 14-2A Soil Scan MDC For Ludlum 44-10 NaI Detector Scan Rate = 0.25 m/s 100% Cs-137 1.0 pCi/g Using Sand (SiO2)

Detector end-cap 1" above Soil Surface @ Detector Centerline (5.08 [2.0"])

Detectable Detectable µR/h/pCi/g 11/9/2011 Exp. Rate Exp. Rate Detectable Microshield Counts cpm/uR/h Scan 44-10 Bkg per ==> 430 940 Exp. Rate Results MDC 0.5 Co-60 Cs-137 cpm second MDCR MDCRsurveyor µR/h µR/h Total µR/h @5.08 cm pCi/g 1.00E+03 8.33E+00 2.39E+02 3.38E+02 0.00E+00 3.60E-01 3.60E-01 0.3235 1.1 2.00E+03 1.67E+01 3.38E+02 4.78E+02 0.00E+00 5.09E-01 5.09E-01 0.3235 1.57 4.00E+03 3.33E+01 4.78E+02 6.76E+02 0.00E+00 7.19E-01 7.19E-01 0.3235 2.22 6.00E+03 5.00E+01 5.85E+02 8.28E+02 0.00E+00 8.81E-01 8.81E-01 0.3235 2.72 8.00E+03 6.67E+01 6.76E+02 9.56E+02 0.00E+00 1.02E+00 1.02E+00 0.3235 3.14 1.00E+04 8.33E+01 7.56E+02 1.07E+03 0.00E+00 1.14E+00 1.14E+00 0.3235 3.52 1.20E+04 1.00E+02 8.28E+02 1.17E+03 0.00E+00 1.25E+00 1.25E+00 0.3235 3.85 1.40E+04 1.17E+02 8.94E+02 1.26E+03 0.00E+00 1.35E+00 1.35E+00 0.3235 4.16 1.80E+04 1.50E+02 1.01E+03 1.43E+03 0.00E+00 1.53E+00 1.53E+00 0.3235 4.72 2.00E+04 1.67E+02 1.07E+03 1.51E+03 0.00E+00 1.61E+00 1.61E+00 0.3235 4.97 4.00E+04 3.33E+02 1.51E+03 2.14E+03 0.00E+00 2.27E+00 2.27E+00 0.3235 7.03 6.00E+04 5.00E+02 1.85E+03 2.62E+03 0.00E+00 2.79E+00 2.79E+00 0.3235 8.61 8.00E+04 6.67E+02 2.14E+03 3.02E+03 0.00E+00 3.22E+00 3.22E+00 0.3235 9.94 1.00E+05 8.33E+02 2.39E+03 3.38E+03 0.00E+00 3.60E+00 3.60E+00 0.3235 11.12 6.0 5.0 3.0" from endcap 4.0 pCi/g 3.0 1.0" from endcap 2.0 1.0 0.0 0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 11000 12000 13000 14000 CPM 29

Soil Scan MDC For Ludlum 44-10 NaI Detector Scan Rate = 0.25 m/s 100% Cs-137 1.0 pCi/g Using Sand (SiO2)

Detector end-cap 2.0" above Soil Surface @ Detector Centerline 7.62 cm (3.0")

Detectable Detectable µR/h/pCi/g 11/9/2011 Exp. Rate Exp. Rate Detectable Microshield Counts cpm/uR/h Scan 44-10 Bkg per ==> 430 940 Exp. Rate Results MDC 0.5 Co-60 Cs-137 cpm second MDCR MDCRsurveyor µR/h µR/h Total µR/h @7.62 cm pCi/g 1.00E+03 8.33E+00 2.39E+02 3.38E+02 0.00E+00 3.60E-01 3.60E-01 0.2683 1.3 2.00E+03 1.67E+01 3.38E+02 4.78E+02 0.00E+00 5.09E-01 5.09E-01 0.2683 1.90 4.00E+03 3.33E+01 4.78E+02 6.76E+02 0.00E+00 7.19E-01 7.19E-01 0.2683 2.68 6.00E+03 5.00E+01 5.85E+02 8.28E+02 0.00E+00 8.81E-01 8.81E-01 0.2683 3.28 8.00E+03 6.67E+01 6.76E+02 9.56E+02 0.00E+00 1.02E+00 1.02E+00 0.2683 3.79 1.00E+04 8.33E+01 7.56E+02 1.07E+03 0.00E+00 1.14E+00 1.14E+00 0.2683 4.24 1.20E+04 1.00E+02 8.28E+02 1.17E+03 0.00E+00 1.25E+00 1.25E+00 0.2683 4.64 1.40E+04 1.17E+02 8.94E+02 1.26E+03 0.00E+00 1.35E+00 1.35E+00 0.2683 5.01 1.80E+04 1.50E+02 1.01E+03 1.43E+03 0.00E+00 1.53E+00 1.53E+00 0.2683 5.69 2.00E+04 1.67E+02 1.07E+03 1.51E+03 0.00E+00 1.61E+00 1.61E+00 0.2683 5.99 4.00E+04 3.33E+02 1.51E+03 2.14E+03 0.00E+00 2.27E+00 2.27E+00 0.2683 8.48 6.00E+04 5.00E+02 1.85E+03 2.62E+03 0.00E+00 2.79E+00 2.79E+00 0.2683 10.38 8.00E+04 6.67E+02 2.14E+03 3.02E+03 0.00E+00 3.22E+00 3.22E+00 0.2683 11.99 1.00E+05 8.33E+02 2.39E+03 3.38E+03 0.00E+00 3.60E+00 3.60E+00 0.2683 13.40 Soil Scan MDC For Ludlum 44-10 NaI Detector Scan Rate = 0.25 m/s 100% Cs-137 1.0 pCi/g Using Sand (SiO2)

Detector end-cap 3.0" above Soil Surface @ Detector Centerline 10.16 cm (4.0")

Detectable Detectable µR/h/pCi/g 11/9/2011 Exp. Rate Exp. Rate Detectable Microshield Counts cpm/uR/h Scan 44-10 Bkg per ==> 430 940 Exp. Rate Results MDC 0.5 Co-60 Cs-137 cpm second MDCR MDCRsurveyor µR/h µR/h Total µR/h @10.0 cm pCi/g 1.00E+03 8.33E+00 2.39E+02 3.38E+02 0.00E+00 3.60E-01 3.60E-01 0.225 1.6 2.00E+03 1.67E+01 3.38E+02 4.78E+02 0.00E+00 5.09E-01 5.09E-01 0.225 2.26 4.00E+03 3.33E+01 4.78E+02 6.76E+02 0.00E+00 7.19E-01 7.19E-01 0.225 3.20 6.00E+03 5.00E+01 5.85E+02 8.28E+02 0.00E+00 8.81E-01 8.81E-01 0.225 3.91 8.00E+03 6.67E+01 6.76E+02 9.56E+02 0.00E+00 1.02E+00 1.02E+00 0.225 4.52 1.00E+04 8.33E+01 7.56E+02 1.07E+03 0.00E+00 1.14E+00 1.14E+00 0.225 5.05 1.20E+04 1.00E+02 8.28E+02 1.17E+03 0.00E+00 1.25E+00 1.25E+00 0.225 5.54 1.40E+04 1.17E+02 8.94E+02 1.26E+03 0.00E+00 1.35E+00 1.35E+00 0.225 5.98 1.80E+04 1.50E+02 1.01E+03 1.43E+03 0.00E+00 1.53E+00 1.53E+00 0.225 6.78 2.00E+04 1.67E+02 1.07E+03 1.51E+03 0.00E+00 1.61E+00 1.61E+00 0.225 7.15 4.00E+04 3.33E+02 1.51E+03 2.14E+03 0.00E+00 2.27E+00 2.27E+00 0.225 10.11 6.00E+04 5.00E+02 1.85E+03 2.62E+03 0.00E+00 2.79E+00 2.79E+00 0.225 12.38 8.00E+04 6.67E+02 2.14E+03 3.02E+03 0.00E+00 3.22E+00 3.22E+00 0.225 14.30 1.00E+05 8.33E+02 2.39E+03 3.38E+03 0.00E+00 3.60E+00 3.60E+00 0.225 15.98 30

Attachment 1-2 SU10218A East Side of ISFSI Gamma Spectroscopy Analysis

Attachment 1-2 10218A East Side of ISFSI Area Gam m a Spectroscopy Analysis Results (in pCi/g) 4/12/2012 Collection Sam ple 2.0 2.0 2.0 2.0 2.0 2.0 Sam ple ID Date Media Ac-228 Error Am -241 Error Co-60 Error Cs-134 Error Cs-137 Error Eu-154 Error L310218CSGSSSA001 11/12/2011 Soil 3.74E-01 7.44E-02 < 5.91E-02 < 3.30E-02 < 2.60E-02 < 3.30E-02 < 8.22E-02 L310218CSGSSBA001 11/12/2011 Soil 2.89E-01 6.59E-02 < 4.65E-02 < 3.10E-02 < 2.09E-02 3.08E-02 2.34E-02 < 7.11E-02 L310218CSGSSSA002 11/12/2011 Soil 2.26E-01 8.70E-02 < 6.10E-02 < 3.93E-02 < 2.84E-02 5.86E-02 2.34E-02 < 9.71E-02 L310218CSGSSBA002 11/12/2011 Soil 3.03E-01 8.05E-02 < 6.29E-02 < 4.43E-02 < 2.71E-02 < 3.32E-02 < 9.41E-02 L310218CSGSSSA003 11/14/2011 Soil 3.60E-01 7.81E-02 < 6.02E-02 < 4.64E-02 < 2.72E-02 < 3.70E-02 < 1.06E-01 L310218CDGSSSA003 11/14/2011 Soil 3.09E-01 8.69E-02 < 6.47E-02 < 4.50E-02 < 2.30E-02 4.64E-02 2.28E-02 < 1.14E-01 L310218CSGSSBA003 11/14/2011 Soil 3.90E-01 8.28E-02 < 7.05E-02 < 4.72E-02 < 2.97E-02 < 3.54E-02 < 1.25E-01 L310218CSGSSSA004 11/14/2011 Soil 3.28E-01 7.42E-02 < 5.31E-02 < 4.25E-02 < 2.37E-02 4.14E-02 3.06E-02 < 9.44E-02 L310218CSGSSBA004 11/14/2011 Soil 2.74E-01 1.09E-01 < 5.89E-02 < 3.64E-02 < 2.45E-02 7.96E-02 2.58E-02 < 1.15E-01 L310218CSGSSSA005 11/14/2011 Soil 3.23E-01 7.07E-02 < 6.64E-02 < 3.84E-02 < 2.42E-02 < 3.98E-02 < 8.52E-02 L310218CSGSSBA005 11/14/2011 Soil 2.83E-01 6.93E-02 < 4.83E-02 < 3.62E-02 < 2.10E-02 3.23E-02 2.12E-02 < 7.84E-02 L310218CSGSSSA006 11/14/2011 Soil 2.63E-01 9.10E-02 < 6.07E-02 < 3.66E-02 < 2.66E-02 3.60E-02 2.64E-02 < 1.03E-01 L310218CSGSSBA006 11/14/2011 Soil 4.07E-01 8.01E-02 < 6.69E-02 < 3.77E-02 < 2.46E-02 < 3.01E-02 < 9.16E-02 L310218CSGSSSA007 11/14/2011 Soil 3.38E-01 7.38E-02 < 5.22E-02 < 4.10E-02 < 2.50E-02 < 3.29E-02 < 9.57E-02 L310218CSGSSBA007 11/14/2011 Soil 3.65E-01 7.90E-02 < 6.19E-02 < 4.65E-02 < 2.56E-02 < 3.21E-02 < 1.03E-01 L310218CSGSSSA008 11/14/2011 Soil 2.82E-01 8.08E-02 < 5.77E-02 < 3.36E-02 < 2.30E-02 < 2.96E-02 < 6.68E-02 L310218CSGSSBA008 11/14/2011 Soil 2.93E-01 6.53E-02 < 5.36E-02 < 3.61E-02 < 2.14E-02 < 3.04E-02 < 8.07E-02 L310218CSGSSSA009 11/14/2011 Soil 3.88E-01 9.37E-02 < 6.53E-02 < 3.73E-02 < 2.87E-02 < 3.14E-02 < 9.70E-02 L310218CSGSSBA009 11/14/2011 Soil 3.48E-01 6.57E-02 < 4.69E-02 < 3.48E-02 < 2.21E-02 6.95E-02 2.21E-02 < 7.90E-02 L310218CSGSSSA010 11/14/2011 Soil 1.76E-01 6.21E-02 < 4.66E-02 < 2.99E-02 < 2.34E-02 < 2.56E-02 < 6.88E-02 L310218CSGSSBA010 11/14/2011 Soil 3.60E-01 1.07E-01 < 8.41E-02 < 6.98E-02 < 5.55E-02 < 5.37E-02 < 1.93E-01 4/12/2012 Collection Sam ple 2.0 2.0 2.0 2.0 2.0 2.0 Sam ple ID Date Media Eu-155 Error I-129 Error K-40 Error Pb-214 Error Tl-208 Error U-235 Error L310218CSGSSSA001 11/12/2011 Soil < 7.02E-02 < 5.55E-02 8.78E+00 1.14E+00 2.93E-01 4.99E-02 2.33E-01 5.35E-02 < 1.48E-01 L310218CSGSSBA001 11/12/2011 Soil < 5.87E-02 < 6.39E-02 7.16E+00 8.86E-01 2.34E-01 4.32E-02 2.84E-01 4.83E-02 < 1.40E-01 L310218CSGSSSA002 11/12/2011 Soil < 7.50E-02 < 9.10E-02 6.98E+00 9.34E-01 2.61E-01 6.33E-02 3.06E-01 5.98E-02 < 1.77E-01 L310218CSGSSBA002 11/12/2011 Soil < 7.33E-02 < 7.40E-02 5.09E+00 7.69E-01 2.81E-01 5.13E-02 3.11E-01 1.05E-01 < 1.55E-01 L310218CSGSSSA003 11/14/2011 Soil < 7.55E-02 < 8.15E-02 9.54E+00 1.17E+00 3.51E-01 5.77E-02 3.37E-01 8.59E-02 < 1.76E-01 L310218CDGSSSA003 11/14/2011 Soil < 7.22E-02 < 7.73E-02 8.19E+00 1.09E+00 2.90E-01 4.65E-02 1.93E-01 8.40E-02 < 1.45E-01 L310218CSGSSBA003 11/14/2011 Soil < 7.94E-02 < 8.01E-02 1.01E+01 1.28E+00 5.04E-01 7.04E-02 3.01E-01 6.87E-02 < 1.79E-01 L310218CSGSSSA004 11/14/2011 Soil < 6.87E-02 < 7.54E-02 9.00E+00 1.10E+00 3.32E-01 4.85E-02 2.71E-01 5.28E-02 < 1.57E-01 L310218CSGSSBA004 11/14/2011 Soil < 6.82E-02 < 7.06E-02 6.53E+00 9.05E-01 2.87E-01 4.92E-02 2.17E-01 5.34E-02 < 1.46E-01 L310218CSGSSSA005 11/14/2011 Soil < 7.52E-02 < 6.74E-02 9.26E+00 1.20E+00 3.34E-01 5.17E-02 2.41E-01 5.58E-02 < 1.79E-01 L310218CSGSSBA005 11/14/2011 Soil < 6.00E-02 < 6.66E-02 8.25E+00 9.97E-01 3.34E-01 4.75E-02 3.55E-01 8.19E-02 < 1.44E-01 L310218CSGSSSA006 11/14/2011 Soil < 7.20E-02 < 7.64E-02 9.01E+00 1.16E+00 3.15E-01 6.20E-02 2.39E-01 5.75E-02 < 1.43E-01 L310218CSGSSBA006 11/14/2011 Soil < 6.70E-02 < 6.43E-02 1.18E+01 1.47E+00 4.82E-01 6.46E-02 3.59E-01 6.72E-02 < 1.69E-01 L310218CSGSSSA007 11/14/2011 Soil < 6.44E-02 < 7.56E-02 8.23E+00 1.03E+00 2.86E-01 5.00E-02 2.52E-01 5.79E-02 < 1.53E-01 L310218CSGSSBA007 11/14/2011 Soil < 7.13E-02 < 8.77E-02 7.22E+00 9.71E-01 3.24E-01 4.68E-02 2.35E-01 6.32E-02 < 1.48E-01 L310218CSGSSSA008 11/14/2011 Soil < 7.10E-02 < 6.69E-02 7.48E+00 9.91E-01 3.49E-01 5.06E-02 2.39E-01 5.36E-02 < 1.58E-01 L310218CSGSSBA008 11/14/2011 Soil < 6.21E-02 < 6.57E-02 9.86E+00 1.14E+00 3.00E-01 4.74E-02 2.44E-01 5.15E-02 < 1.43E-01 L310218CSGSSSA009 11/14/2011 Soil < 8.26E-02 < 6.80E-02 9.06E+00 1.18E+00 4.42E-01 6.08E-02 2.66E-01 5.80E-02 < 1.82E-01 L310218CSGSSBA009 11/14/2011 Soil < 6.19E-02 < 6.39E-02 6.81E+00 8.78E-01 3.22E-01 4.65E-02 2.97E-01 5.72E-02 < 1.47E-01 L310218CSGSSSA010 11/14/2011 Soil < 5.21E-02 < 6.11E-02 3.77E+00 5.93E-01 1.35E-01 3.72E-02 1.31E-01 3.90E-02 < 1.16E-01 L310218CSGSSBA010 11/14/2011 Soil < 9.94E-02 < 9.06E-02 1.02E+01 1.59E+00 4.03E-01 8.46E-02 2.69E-01 8.44E-02 < 2.46E-01

Attachment 1-2 10218A East Side of ISFSI Area Gam m a Spectroscopy Analysis Results (in pCi/g) 4/12/2012 Collection Sam ple 2.0 2.0 2.0 2.0 2.0 s 2.0 s Sam ple ID Date Media Ac-228 Error Am -241 Error Co-60 Error Cs-134 Error Cs-137 Error Eu-154 Error L310218CSGSSSA011 11/14/2011 Soil 2.22E-01 6.97E-02 < 4.30E-02 < 3.33E-02 < 2.09E-02 < 2.54E-02 < 7.70E-02 L310218CSGSSBA011 11/14/2011 Soil 2.65E-01 7.38E-02 < 5.17E-02 < 3.25E-02 < 2.64E-02 < 2.85E-02 < 9.34E-02 L310218CSGSSSA012 11/14/2011 Soil 4.03E-01 1.16E-01 < 7.78E-02 < 6.92E-02 < 4.94E-02 < 5.92E-02 < 1.69E-01 L310218CSGSSBA012 11/14/2011 Soil 1.92E-01 8.34E-02 < 5.22E-02 < 3.21E-02 < 2.08E-02 < 2.68E-02 < 7.86E-02 L310218CSGSSSA013 11/12/2011 Soil 3.56E-01 6.46E-02 < 4.95E-02 < 3.80E-02 < 2.37E-02 4.13E-02 2.74E-02 < 8.80E-02 L310218CSGSSBA013 11/12/2011 Soil 2.98E-01 7.53E-02 < 5.69E-02 < 3.68E-02 < 2.60E-02 5.43E-02 2.94E-02 < 1.02E-01 L310218CSGSSSA014 11/12/2011 Soil 3.11E-01 6.55E-02 < 5.31E-02 < 3.22E-02 < 1.99E-02 3.16E-02 2.15E-02 < 7.86E-02 L310218CSGSSBA014 11/12/2011 Soil 3.14E-01 1.01E-01 < 7.31E-02 < 6.09E-02 < 5.00E-02 < 5.58E-02 < 1.47E-01 L310218CSGSSSA015 11/12/2011 Soil 1.46E-01 4.98E-02 < 4.10E-02 < 2.82E-02 < 1.90E-02 < 3.06E-02 < 7.20E-02 L310218CSGSSBA015 11/12/2011 Soil 3.10E-01 7.93E-02 < 5.96E-02 < 4.19E-02 < 2.62E-02 2.93E-02 2.39E-02 < 9.45E-02 L310218CSGSSSA016 11/12/2011 Soil 3.90E-01 1.14E-01 < 8.30E-02 < 7.10E-02 < 4.97E-02 < 6.31E-02 < 2.21E-01 L310218CSGSSBA016 11/12/2011 Soil 2.94E-01 7.04E-02 < 5.35E-02 < 3.18E-02 < 2.33E-02 5.55E-02 3.01E-02 < 8.63E-02 L310218CSGSSSA017 11/12/2011 Soil 2.91E-01 7.71E-02 < 5.43E-02 < 3.17E-02 < 2.05E-02 4.57E-02 2.87E-02 < 8.08E-02 L310218CSGSSBA017 11/12/2011 Soil 3.10E-01 6.66E-02 < 4.58E-02 < 3.18E-02 < 2.22E-02 5.64E-02 1.75E-02 < 8.45E-02 L310218CSGSSSA018 11/12/2011 Soil 2.52E-01 6.89E-02 < 5.57E-02 < 4.08E-02 < 2.35E-02 3.04E-02 3.25E-02 < 1.10E-01 L310218CSGSSBA018 11/12/2011 Soil 2.96E-01 1.00E-01 < 6.57E-02 < 5.25E-02 < 4.60E-02 < 4.40E-02 < 1.24E-01 L310218CSGSSSA019 11/12/2011 Soil < 8.74E-02 < 3.25E-02 < 2.33E-02 < 1.78E-02 < 2.14E-02 < 5.57E-02 L310218CSGSSBA019 11/12/2011 Soil 3.65E-01 7.35E-02 < 6.37E-02 < 3.20E-02 < 2.55E-02 < 3.04E-02 < 9.21E-02 L310218CSDSSBA019 11/12/2011 Soil 3.59E-01 8.82E-02 < 7.18E-02 < 4.73E-02 < 2.94E-02 < 3.68E-02 < 1.23E-01 L310218CSGSSSA020 11/12/2011 Soil 2.74E-01 9.44E-02 < 6.24E-02 < 6.43E-02 < 4.22E-02 < 4.25E-02 < 1.48E-01 L310218CSGSSBA020 11/12/2011 Soil 3.21E-01 7.11E-02 , 4.34E-02 < 2.83E-02 < 1.83E-02 4.87E-02 2.24E-02 < 7.73E-02 4/12/2012 Collection Sam ple 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s Sam ple ID Date Media Eu-155 Error I-129 Error K-40 Error Pb-214 Error Tl-208 Error U-235 Error L310218CSGSSSA011 11/14/2011 Soil < 5.51E-02 < 6.50E-02 6.44E+00 8.09E-01 1.84E-01 3.89E-02 2.17E-01 5.13E-02 < 1.32E-01 L310218CSGSSBA011 11/14/2011 Soil < 6.17E-02 < 6.26E-02 5.41E+00 7.54E-01 1.99E-01 4.99E-02 2.17E-01 5.08E-02 < 1.29E-01 L310218CSGSSSA012 11/14/2011 Soil < 8.83E-02 < 8.13E-02 8.67E+00 1.37E+00 3.52E-01 7.04E-02 2.57E-01 8.80E-02 < 2.30E-01 L310218CSGSSBA012 11/14/2011 Soil < 6.02E-02 < 4.78E-02 8.81E+00 1.11E+00 2.63E-02 4.28E-02 2.75E-01 5.44E-02 < 1.35E-01 L310218CSGSSSA013 11/12/2011 Soil < 6.19E-02 < 6.07E-02 1.04E+01 1.19E+00 3.07E-01 4.49E-02 3.05E-01 5.79E-02 < 1.43E-01 L310218CSGSSBA013 11/12/2011 Soil < 6.85E-02 < 7.23E-02 6.95E+00 9.61E-01 2.62E-01 5.06E-02 2.84E-01 5.49E-02 < 1.47E-01 L310218CSGSSSA014 11/12/2011 Soil < 6.84E-02 < 5.77E-02 7.92E+00 1.05E+00 2.75E-01 4.49E-02 2.23E-01 5.22E-02 < 1.53E-01 L310218CSGSSBA014 11/12/2011 Soil < 8.78E-02 < 7.86E-02 7.24E+00 1.14E+00 4.37E-01 8.82E-02 2.60E-01 9.47E-02 < 2.06E-01 L310218CSGSSSA015 11/12/2011 Soil < 4.78E-02 < 6.63E-02 3.96E+00 5.94E-01 1.77E-01 3.59E-02 1.43E-01 5.81E-02 < 1.21E-01 L310218CSGSSBA015 11/12/2011 Soil < 7.19E-02 < 7.07E-02 8.87E+00 1.13E+00 3.76E-01 5.71E-02 2.21E-01 4.96E-02 < 1.60E-01 L310218CSGSSSA016 11/12/2011 Soil < 9.42E-02 < 9.05E-02 1.01E+01 1.52E+00 4.13E-01 8.36E-02 3.06E-01 8.88E-02 < 2.24E-01 L310218CSGSSBA016 11/12/2011 Soil < 5.93E-02 < 6.28E-02 7.71E+00 9.77E-01 3.00E-01 4.67E-02 2.59E-01 8.55E-02 < 1.36E-01 L310218CSGSSSA017 11/12/2011 Soil < 6.75E-02 < 5.92E-02 8.00E+00 1.03E+00 2.98E-01 4.15E-02 2.36E-01 4.86E-02 < 1.55E-01 L310218CSGSSBA017 11/12/2011 Soil < 5.69E-02 < 5.89E-02 8.02E+00 9.46E-01 3.28E-01 4.40E-02 2.56E-01 5.05E-02 < 1.34E-01 L310218CSGSSSA018 11/12/2011 Soil < 6.27E-02 < 6.74E-02 6.90E+00 9.25E-01 3.01E-01 5.43E-02 1.92E-01 5.33E-02 < 1.44E-01 L310218CSGSSBA018 11/12/2011 Soil < 7.08E-02 < 6.93E-02 8.22E+00 1.23E+00 1.94E-01 6.00E-02 2.17E-01 7.97E-02 < 1.92E-01 L310218CSGSSSA019 11/12/2011 Soil < 3.92E-02 < 6.26E-02 1.41E+00 3.01E-01 1.14E-01 3.18E-02 < 3.00E-02 < 1.06E-01 L310218CSGSSBA019 11/12/2011 Soil < 7.18E-02 < 6.34E-02 9.99E+00 1.27E+00 3.79E-01 5.78E-02 3.29E-01 7.07E-02 < 1.64E-01 L310218CSDSSBA019 11/12/2011 Soil < 7.72E-02 < 8.79E-02 9.79E+00 1.28E+00 3.65E-01 7.24E-02 2.54E-01 5.80E-02 < 1.77E-01 L310218CSGSSSA020 11/12/2011 Soil < 7.18E-02 < 7.18E-02 8.01E+00 1.26E+00 2.65E-01 5.59E-02 1.52E-01 6.35E-02 < 1.76E-01 L310218CSGSSBA020 11/12/2011 Soil < 4.45E-02 < 5.74E-02 8.73E+00 1.00E+00 2.73E-01 4.46E-02 2.28E-01 4.74E-02 < 1.29E-01 3

Attachment 1-2 10218A East Side of ISFSI Area Gam m a Spectroscopy Analysis Results (in pCi/g) 4/12/2012 Collection Sam ple 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s Sam ple ID Date Media Ac-228 Error Am -241 Error Co-60 Error Cs-134 Error Cs-137 Error Eu-154 Error L310218CSGSSSA021 11/12/2011 Soil 3.29E-01 6.21E-02 < 5.48E-02 < 3.74E-02 < 2.13E-02 7.38E-02 2.11E-02 < 7.69E-02 L310218CSGSSBA021 11/12/2011 Soil 1.96E-01 9.15E-02 < 5.34E-02 < 3.69E-02 < 2.45E-02 < 2.97E-02 < 9.91E-01 L310218CDGSSBA021 11/12/2011 Soil 2.67E-01 1.03E-01 < 6.68E-02 < 6.35E-02 < 4.39E-02 < 4.59E-02 < 1.52E-01 L310218CSGSSSA022 11/12/2011 Soil 3.19E-01 1.37E-01 < 6.84E-02 < 4.19E-02 < 3.13E-02 2.02E-02 2.09E-02 < 9.39E-02 L310218CDGSSSA022 11/12/2011 Soil 2.82E-01 1.48E-01 < 7.63E-02 < 4.50E-02 < 3.60E-02 < 4.56E-02 < 1.45E-01 L310218CSGSSBA022 11/12/2011 Soil 3.27E-01 1.86E-01 < 8.32E-02 < 7.01E-02 < 5.53E-02 < 5.85E-02 < 1.71E-01 L310218CSGSSSA023 11/12/2011 Soil 3.62E-01 7.28E-02 < 5.86E-02 < 3.78E-02 < 2.33E-02 < 2.82E-02 < 1.08E-01 L310218CSGSSBA023 11/12/2011 Soil 2.73E-01 6.59E-02 < 5.13E-02 < 2.89E-02 < 2.10E-02 < 2.86E-02 < 7.27E-02 L310218CSGSSSA024 11/12/2011 Soil 2.23E-01 7.76E-02 < 5.58E-02 < 3.74E-02 < 2.45E-02 5.52E-02 2.57E-02 < 9.94E-02 L310218CSGSSBA024 11/12/2011 Soil 2.48E-01 5.01E-02 < 4.07E-02 < 2.16E-02 < 1.47E-02 3.16E-02 2.23E-02 < 6.38E-02 L310218CSGSSSA025 11/12/2011 Soil 3.71E-01 1.08E-01 < 6.69E-02 < 6.64E-02 < 4.21E-02 < 4.45E-02 < 1.47E-01 L310218CSGSSBA025 11/12/2011 Soil 2.74E-01 6.60E-02 < 4.13E-02 < 3.18E-02 < 1.88E-02 1.92E-02 1.45E-02 < 8.04E-02 L310218CSGSSSA026 11/12/2011 Soil 2.15E-01 8.35E-02 < 4.61E-02 < 2.67E-02 < 2.08E-02 < 2.33E-02 < 7.73E-02 L310218CSGSSBA026 11/12/2011 Soil 2.70E-01 8.02E-02 < 3.48E-02 < 3.43E-02 < 2.17E-02 < 2.71E-02 < 8.87E-02 L310218CSGSSSA027 11/12/2011 Soil 2.05E-01 7.16E-02 < 5.69E-02 < 5.19E-02 < 3.00E-02 < 3.12E-02 < 8.71E-02 L310218CSGSSBA027 11/12/2011 Soil 3.36E-01 8.02E-02 < 6.01E-02 < 3.40E-02 < 2.39E-02 < 3.06E-02 < 1.25E-01 L310218CSGSSSA028 11/12/2011 Soil 2.94E-01 9.15E-02 < 5.86E-02 < 5.75E-02 < 3.78E-02 < 3.63E-02 < 1.49E-01 L310218CSGSSBA028 11/12/2011 Soil 2.61E-01 5.29E-02 < 4.47E-02 < 3.05E-02 < 1.89E-02 < 2.59E-02 < 8.37E-02 L310218CSPAAVA029 11/16/2011 Asphalt < 1.82E-01 < 5.08E-02 < 4.42E-02 < 3.63E-02 < 3.38E-02 < 1.27E-01 L310218CSGSSSA029 11/16/2011 Soil 2.90E-01 5.94E-02 < 4.43E-02 < 2.93E-02 < 2.02E-02 1.22E-02 1.24E-02 < 7.81E-02 L310218CSGSSBA029 11/16/2011 Soil 2.83E-01 8.65E-02 < 6.58E-02 < 4.62E-02 < 5.69E-02 < 3.64E-02 < 1.13E-01 L310218CSGSSSA030 11/15/2011 Soil 1.35E-01 6.32E-02 < 5.31E-02 < 2.96E-02 < 1.95E-02 2.18E-02 1.74E-02 < 7.02E-02 L310218CSGSSBA030 11/15/2011 Soil 3.87E-01 1.36E-01 < 9.68E-02 < 6.81E-02 < 6.49E-02 < 6.62E-02 < 2.29E-01 4/12/2012 Collection Sam ple 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s Sam ple ID Date Media Eu-155 Error I-129 Error K-40 Error Pb-214 Error Tl-208 Error U-235 Error L310218CSGSSSA021 11/12/2011 Soil < 6.66E-02 < 5.13E-02 8.91E+00 1.12E+00 3.65E-01 4.75E-02 2.85E-01 5.34E-02 < 1.45E-01 L310218CSGSSBA021 11/12/2011 Soil < 4.72E-02 < 6.72E-02 8.63E+00 1.09E+00 2.65E-01 5.00E-02 1.94E-01 5.20E-02 < 1.37E-01 L310218CDGSSBA021 11/12/2011 Soil < 7.58E-02 < 6.85E-02 9.82E+00 1.38E+00 2.61E-01 5.79E-02 3.98E-01 1.26E-01 < 1.68E-01 L310218CSGSSSA022 11/12/2011 Soil < 8.13E-02 < 7.23E-02 9.25E+00 1.24E+00 2.97E-01 5.96E-02 2.87E-01 6.81E-02 < 1.88E-01 L310218CDGSSSA022 11/12/2011 Soil < 7.35E-02 < 9.37E-02 8.95E+00 1.24E+00 3.71E-01 6.47E-02 2.84E-01 7.15E-02 < 1.90E-01 L310218CSGSSBA022 11/12/2011 Soil < 9.80E-02 < 8.73E-02 1.03E+01 1.50E+00 5.46E-01 1.13E-01 2.82E-01 9.56E-02 < 2.29E-01 L310218CSGSSSA023 11/12/2011 Soil < 6.77E-02 < 6.88E-02 9.25E+00 1.13E+00 4.49E-01 6.14E-02 3.05E-01 5.90E-02 < 1.45E-01 L310218CSGSSBA023 11/12/2011 Soil < 6.25E-02 < 5.09E-02 7.99E+00 1.03E+00 2.60E-01 4.12E-02 2.19E-01 4.53E-02 < 1.40E-01 L310218CSGSSSA024 11/12/2011 Soil < 6.34E-02 < 9.95E-02 6.95E+00 9.34E-01 2.75E-01 5.83E-02 1.64E-01 4.87E-02 < 1.37E-01 L310218CSGSSBA024 11/12/2011 Soil < 4.99E-02 < 3.94E-02 5.30E+00 6.97E-01 2.05E-01 2.90E-02 1.91E-01 3.62E-02 < 1.09E-01 L310218CSGSSSA025 11/12/2011 Soil < 4.73E-02 < 5.97E-02 4.63E+00 6.78E-01 9.80E-02 3.42E-02 1.57E-01 3.92E-02 < 1.06E-01 L310218CSGSSBA025 11/12/2011 Soil < 5.26E-02 , 5.64E-02 7.68E+00 9.04E-01 2.81E-01 3.94E-02 2.08E-01 4.43E-02 < 1.21E-01 L310218CSGSSSA026 11/12/2011 Soil < 5.06E-02 < 5.57E-02 5.43E+00 7.31E-01 1.78E-01 3.62E-02 1.81E-01 4.22E-02 < 1.12E-01 L310218CSGSSBA026 11/12/2011 Soil < 6.99E-02 < 5.64E-02 8.99E+00 1.14E+00 3.60E-01 6.08E-02 2.56E-02 5.67E-02 < 1.62E-01 L310218CSGSSSA027 11/12/2011 Soil < 5.75E-02 < 6.49E-02 6.91E+00 8.67E-01 1.93E-01 4.31E-02 1.72E-01 4.99E-02 < 1.41E-01 L310218CSGSSBA027 11/12/2011 Soil < 7.32E-02 < 6.67E-02 9.52E+00 1.16E+00 4.36E-01 5.79E-02 3.19E-02 5.98E-02 < 1.54E-01 L310218CSGSSSA028 11/12/2011 Soil < 6.83E-02 < 6.23E-02 6.37E+00 1.04E+00 1.20E-01 4.86E-02 1.86E-01 5.76E-02 < 1.62E-01 L310218CSGSSBA028 11/12/2011 Soil < 5.30E-02 < 5.15E-02 1.05E+01 1.16E+00 2.50E-01 4.19E-02 2.26E-01 4.94E-02 < 1.29E-01 L310218CSPAAVA029 11/16/2011 Asphalt < 5.79E-02 < 5.13E-02 3.87E+00 7.15E-01 1.42E-01 3.87E-02 1.30E-01 4.78E-02 < 1.25E-01 L310218CSGSSSA029 11/16/2011 Soil < 5.64E-02 < 5.76E-02 6.43E+00 7.91E-01 2.40E-01 3.76E-02 2.27E-01 5.67E-02 < 1.23E-01 L310218CSGSSBA029 11/16/2011 Soil < 7.91E-02 < 7.73E-02 8.85E+00 1.18E+00 3.90E-01 6.94E-02 2.32E-01 5.63E-02 < 1.67E-01 L310218CSGSSSA030 11/15/2011 Soil < 5.36E-02 < 6.06E-02 5.00E+00 7.20E-02 1.50E-01 4.56E-02 1.57E-01 4.60E-02 < 1.21E-01 4

Attachment 1-2 10218A East Side of ISFSI Area Gam m a Spectroscopy Analysis Results (in pCi/g) 4/12/2012 Collection Sam ple 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s Sam ple ID Date Media Ac-228 Error Am -241 Error Co-60 Error Cs-134 Error Cs-137 Error Eu-154 Error L310218IIGSSSA001 11/21/2011 Soil 6.97E-01 1.01E-01 < 7.60E-02 < 4.38E-02 < 2.57E-02 1.16E-01 3.29E-02 < 1.07E-01 L310218IIGSSSA002 11/21/2011 Soil 7.70E-01 2.40E-01 < 1.03E-01 < 8.28E-02 < 6.02E-02 1.09E-01 6.44E-02 < 2.17E-01 L310218IIGSSBA003 11/21/2011 Soil 4.20E-01 1.39E-01 < 8.19E-02 < 7.02E-02 < 4.97E-02 < 5.59E-02 < 1.68E-01 4/12/2012 Collection Sam ple 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s Sam ple ID Date Media Eu-155 Error I-129 Error K-40 Error Pb-214 Error Tl-208 Error U-235 Error L310218IIGSSSA001 11/21/2011 Soil < 8.90E-02 < 7.06E-02 1.49E+01 1.78E+00 5.72E-01 6.56E-02 4.81E-01 < 1.90E-01 L310218IIGSSSA002 11/21/2011 Soil < 1.25E-01 < 1.07E-01 1.50E+01 2.12E+00 5.94E-01 1.00E-01 4.84E-01 < 2.91E-01 L310218IIGSSBA003 11/21/2011 Soil < 9.27E-02 < 8.30E-02 1.07E+01 1.54E+00 4.13E-01 8.07E-02 3.24E-01 1.35E-01 < 2.28E-01 5

Attachment 1-3 SU10218A East Side of ISFSI Duplicate Soil Samples

Attachment 1-3 10218A East Side of ISFSI Duplicate Comparison (in pCi/g) 4/17/2012 Duplicates: Ac-228 UNC Cs-137 UNC K-40 UNC Pb-214 UNC Tl-208 UNC L310218CSGSSS-A003 3.60E-01 7.81E-02 < 3.70E-02 9.54E+00 1.17E+00 3.51E-01 5.77E-02 3.37E-01 8.59E-02 L310218CDGSSS-A003 3.09E-01 8.69E-02 4.64E-02 2.28E-02 8.19E+00 1.09E+00 2.90E-01 4.65E-02 1.93E-01 8.40E-02 e/Uncertianty 4.61E+00 N/A 8.15E+00 6.08E+00 3.92E+00 Resolution 4-7 8-15 4-7 <4 tance Criteria 0.5-2.5 0.6-1.66 0.5-2.0 0.4-2.5 mple/Duplicate 1.17E+00 Pass 1.16E+00 Pass 1.21E+00 Pass 1.75E+00 Pass L310218CSGSSB-A019 3.65E-01 7.35E-02 < 3.71E-02 9.99E+00 1.27E+00 3.79E-01 5.78E-02 3.29E-01 7.07E-02 L310218CDGSSB-A019 3.59E-01 8.82E-02 < 3.40E-02 9.79E+00 1.28E+00 3.65E-01 7.24E-02 2.54E-01 5.80E-02 e/Uncertianty 4.97E+00 N/A 7.87E+00 6.56E+00 4.65E+00 Resolution 4-7 8-15 4-7 4-7 tance Criteria 0.5-2.5 0.6-1.66 0.5-2.0 0.5-2.0 mple/Duplicate 1.02E+00 Pass 1.02E+00 Pass 1.04E+00 Pass 1.30E+00 Pass L310218CSGSSB-A021 1.96E-01 9.15E-02 < 2.97E-02 8.63E+00 1.09E+00 2.65E-01 5.00E-02 1.94E-01 5.20E-02 L310218CDGSSB-A021 2.67E-01 1.03E-01 < 4.59E-02 9.82E+00 1.38E+00 2.61E-01 5.79E-02 3.98E-01 1.26E-01 e/Uncertianty 2.14E+00 N/A 7.92E+00 5.30E+00 3.73E+00 Resolution <4 8-15 4-7 <4 tance Criteria 0.4-2.5 0.6-1.66 0.5-2.0 0.4-2.5 mple/Duplicate 7.34E-01 Pass 8.79E-01 Pass 1.02E+00 Pass 4.87E-01 Pass L310218CSGSSS-A022 3.19E-01 1.37E-01 < 4.59E-02 9.25E+00 1.24E+00 2.97E-01 5.96E-02 2.87E-01 6.81E-02 L310218CDGSSS-A022 2.82E-01 1.48E-01 2.02E-02 2.09E-02 8.95E+00 1.24E+00 3.71E-01 6.47E-02 2.84E-01 7.15E-02 e/Uncertianty 2.33E+00 N/A 7.46E+00 4.98E+00 4.21E+00 Resolution <4 A cceptance Criteria 8-15 4-7 4-7 Acceptance Resolution tance Criteria 0.4-2.5 Criteria 0.6-1.66 0.5-2.0 0.5-2.0 mple/Duplicate 1.13E+00 Pass <4 0.40-2.50 1.03E+00 Pass 8.01E-01 Pass 1.01E+00 Pass 4-7 0.5-2.00 8-15 0.60-1.66 16-50 0.75-1.33 51-200 0.80-1.25

>200 0.85-1.18 2

Attachment 1-4 SU10218A East Side of ISFSI Hard-To-Detect Radionuclide Analysis Results

Attachment 1-4 10218A East Side of ISFSI Hard To Detect Radionuclide Analysis Results (in pCi/g) 4/17/2012 Collection Sam ple Sam ple ID Date Media Fe-55 Uncertianty Ni-63* Uncertianty Sr-90* Uncertianty 0218CSGSSSA11/14/2011 Soil < 2.37E-01 4.21E-01 1.60E-01 2.83E-01 6.71E-02 0218CSGSSBA11/14/2011 Soil < 2.32E-01 5.97E-01 1.55E-01 < 1.36E-01 0218CSGSSSA11/14/2011 Soil < 2.69E-01 4.19E-01 1.59E-01 1.98E-01 7.87E-02 0218CSGSSBA11/14/2011 Soil < 2.43E-01 3.29E-01 1.64E-01 1.76E-01 6.76E-02 0218CSGSSSA11/12/2011 Soil < 2.30E-01 2.95E+00 2.25E-01 1.88E-01 8.36E-02 0218CSGSSBA11/12/2011 Soil < 2.47E-01 < 2.35E-01 < 1.50E-01 218CSPAAVA11/16/2011 Asphalt < 2.49E-01 4.83E-01 1.49E-01 < 1.48E-01 0218CSGSSSA11/16/2011 Soil < 2.49E-01 7.37E-01 1.92E-01 < 1.68E-01 0218CSGSSBA11/16/2011 Soil < 2.17E-01 8.34E-01 2.57E-01 < 1.21E-01 0218IIGSSSA 11/21/2011 Soil < 2.72E-01 7.39E-01 1.67E-01 3.02E-01 7.42E-02 0218IIGSSSA 11/21/2011 Soil < 2.99E-01 1.21E+00 2.73E-01 3.87E-01 9.30E-02 0218IIGSSBA 11/21/2011 Soil < 2.15E-01 3.09E-01 1.54E-01 < 1.34E-01 As per communications w ith the vendor laboratory the positive results noted for Ni-63 and Sr-90 are due to method noise (noise level equivalent and are therefore false positives.

2

Attachment 1-5 SU10218B West Side of ISFSI Gamma Spectroscopy Analysis 3

Attachment 1-5 10218B West Side of ISFSI Area Gam m a Spectroscopy Analysis Results (in pCi/g) 3/26/2012 Collection Sam ple 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s Sam ple ID Date Media Ac-228 Error Am -241 Error Co-60 Error Cs-134 Error Cs-137 Error Eu-154 Error L310218CSGSSSB001 11/17/2011 Soil 3.78E-01 7.96E-02 < 6.87E-02 < 4.44E-02 < 2.68E-02 < 4.19E-02 < 1.18E-01 L310218CSGSSBB001 11/17/2011 Soil < 2.60E-01 < 8.08E-02 < 5.77E-02 < 5.14E-02 6.95E-02 4.59E-02 < 1.69E-01 L310218CSGSSSB002 11/17/2011 Soil 3.82E-01 1.23E-01 < 5.57E-02 < 3.90E-02 < 2.56E-02 9.08E-02 3.57E-02 < 9.56E-02 L310218CDGSSSB002 11/17/2011 Soil 3.25E-01 8.64E-02 < 6.51E-02 < 3.97E-02 < 2.35E-02 7.13E-02 2.52E-02 < 1.09E-01 L310218CSGSSBB002 11/17/2011 Soil 5.11E-01 1.45E-01 < 9.27E-02 < 7.66E-02 < 5.73E-02 < 5.97E-02 < 2.06E-01 L310218CSGSSSB003 11/17/2011 Soil 2.25E-01 7.70E-02 < 5.50E-02 < 3.67E-02 < 2.56E-02 3.07E-01 4.94E-02 < 8.74E-02 L310218CSGSSBB003 11/17/2011 Soil 2.16E-01 6.79E-02 < 4.79E-02 < 2.59E-02 < 1.93E-02 < 2.69E-02 < 7.18E-02 L310218CSGSSSB004 11/17/2011 Soil 2.48E-01 6.49E-02 < 5.58E-02 < 3.32E-02 < 2.22E-02 1.17E-01 2.97E-02 < 9.38E-02 L310218CSGSSBB004 11/17/2011 Soil 3.32E-01 1.63E-01 < 7.32E-02 < 6.59E-02 < 4.55E-02 7.37E-02 4.57E-02 < 1.72E-01 L310218CSGSSSB005 11/17/2011 Soil 4.37E-01 8.51E-02 < 5.90E-02 < 3.96E-02 < 2.67E-02 < 3.47E-02 < 1.14E-01 L310218CSGSSBB005 11/17/2011 Soil 4.09E-01 1.26E-01 < 6.63E-02 < 4.60E-02 < 2.65E-02 < 3.48E-02 < 1.00E-01 L310218CSGSSSB006 11/17/2011 Soil 1.92E-01 1.11E-01 < 6.63E-02 < 4.35E-02 < 2.77E-02 5.27E-02 3.48E-02 < 1.16E-01 L310218CSGSSBB006 11/17/2011 Soil 3.94E-01 7.92E-02 < 6.29E-02 < 3.40E-02 < 2.34E-02 < 2.81E-02 < 1.02E-01 L310218CSGSSSB007 11/17/2011 Soil 2.44E-01 9.38E-02 < 6.21E-02 < 4.45E-02 < 2.86E-02 8.19E-02 3.11E-02 < 9.65E-02 L310218CSGSSBB007 11/17/2011 Soil 1.51E-01 6.76E-02 < 4.59E-02 < 2.57E-02 < 1.78E-02 3.12E-02 1.92E-02 < 5.05E-02 L310218CSGSSSB008 11/17/2011 Soil 3.23E-01 1.76E-01 < 7.26E-02 < 7.14E-02 < 4.40E-02 < 5.91E-02 < 1.72E-01 L310218CSGSSBB008 11/17/2011 Soil 2.70E-01 7.88E-02 < 4.94E-02 < 2.77E-02 < 2.25E-02 < 2.31E-02 < 7.70E-02 L310218CSGSSSB009 11/17/2011 Soil 3.25E-01 6.96E-02 < 7.45E-02 < 3.73E-02 < 2.27E-02 3.38E-02 2.46E-02 < 1.02E-01 L310218CSGSSBB009 11/17/2011 Soil 3.20E-01 5.90E-02 < 4.35E-02 < 2.87E-02 < 2.16E-02 6.54E-02 2.58E-02 < 7.64E-02 L310218CSGSSSB010 11/17/2011 Soil 2.09E-01 1.05E-01 < 6.31E-02 < 4.00E-02 < 2.79E-02 < 3.87E-02 < 1.10E-01 L310218CSGSSBB010 11/17/2011 Soil 3.15E-01 7.35E-02 < 5.28E-02 < 3.82E-02 < 2.10E-02 < 2.63E-02 < 8.98E-02 3/26/2012 Collection Sam ple 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s Sam ple ID Date Media Eu-155 Error I-129 Error K-40 Error Pb-214 Error Tl-208 Error U-235 Error L310218CSGSSSB001 11/17/2011 Soil < 7.77E-02 < 8.29E-02 9.49E+00 1.25E+00 2.98E-01 6.65E-02 3.03E-01 1.03E-01 < 1.75E-01 L310218CSGSSBB001 11/17/2011 Soil < 8.93E-02 < 8.69E-02 7.27E+00 1.20E+00 2.89E-01 8.48E-02 2.37E-01 7.99E-02 < 2.15E-01 L310218CSGSSSB002 11/17/2011 Soil < 7.10E-02 < 6.86E-02 9.76E+00 1.16E+00 4.46E-01 5.20E-02 3.28E-01 6.28E-02 < 1.58E-01 L310218CDGSSSB002 11/17/2011 Soil < 7.54E-02 < 6.58E-02 9.01E+00 1.18E+00 4.32E-01 5.55E-02 2.28E-01 5.92E-02 < 1.84E-01 L310218CSGSSBB002 11/17/2011 Soil < 1.07E-01 < 9.58E-02 1.26E+01 1.82E+00 5.73E-01 9.59E-02 2.89E-01 9.28E-02 < 2.64E-01 L310218CSGSSSB003 11/17/2011 Soil < 6.71E-02 < 7.35E-02 6.23E+00 8.31E-01 2.17E-01 4.36E-02 2.92E-01 6.30E-02 < 1.52E-01 L310218CSGSSBB003 11/17/2011 Soil < 5.69E-02 < 4.90E-02 6.55E+00 8.68E-01 2.20E-01 3.37E-02 2.04E-01 4.90E-02 < 1.28E-01 L310218CSGSSSB004 11/17/2011 Soil < 6.50E-02 < 6.99E-02 5.32E+00 7.76E-01 1.81E-01 4.55E-02 2.71E-01 8.19E-02 < 1.26E-01 L310218CSGSSBB004 11/17/2011 Soil < 8.43E-02 < 8.15E-02 7.66E+00 1.23E+00 2.35E-01 6.98E-02 < 1.69E-01 < 2.02E-01 L310218CSGSSSB005 11/17/2011 Soil < 7.48E-02 < 7.44E-02 1.29E+01 1.47E+00 4.76E-01 5.56E-02 3.88E-01 7.01E-02 < 1.71E-01 L310218CSGSSBB005 11/17/2011 Soil < 7.41E-02 < 7.61E-02 8.27E+00 1.11E+00 3.91E-01 5.38E-02 2.73E-01 1.00E-01 < 1.59E-01 L310218CSGSSSB006 11/17/2011 Soil < 7.20E-02 < 7.72E-02 8.69E+00 1.14E+00 3.29E-01 6.16E-02 2.23E-01 6.10E-02 < 1.52E-01 L310218CSGSSBB006 11/17/2011 Soil < 7.53E-02 < 6.35E-02 1.10E+01 1.36E+00 4.74E-01 5.63E-02 3.36E-01 6.00E-02 < 1.62E-01 L310218CSGSSSB007 11/17/2011 Soil < 7.34E-02 < 8.40E-02 4.94E+00 7.91E-01 1.56E-01 5.28E-02 1.25E-01 5.11E-02 < 1.51E-01 L310218CSGSSBB007 11/17/2011 Soil < 5.34E-02 < 4.87E-02 5.17E+00 7.16E-02 1.56E-01 3.44E-02 2.24E-01 4.44E-02 < 1.25E-01 L310218CSGSSSB008 11/17/2011 Soil < 8.59E-02 < 8.00E-02 6.20E+00 1.11E+00 2.11E-01 6.74E-02 1.90E-01 9.13E-02 < 2.00E-01 L310218CSGSSBB008 11/17/2011 Soil < 6.06E-02 < 5.27E-02 5.73E+00 7.85E-02 2.21E-01 3.96E-02 2.27E-01 5.17E-02 < 1.42E-01 L310218CSGSSSB009 11/17/2011 Soil < 7.42E-02 < 9.03E-02 9.53E+00 1.21E+00 3.00E-01 4.29E-02 3.02E-01 5.33E-02 < 1.67E-01 L310218CSGSSBB009 11/17/2011 Soil < 5.39E-02 < 6.00E-02 6.88E+00 8.44E-01 2.65E-01 3.67E-02 2.59E-01 6.11E-02 < 1.25E-01 L310218CSGSSSB010 11/17/2011 Soil < 6.79E-02 < 8.76E-02 8.50E+00 1.12E+00 3.01E-01 4.60E-02 2.36E-01 6.68E-02 < 1.50E-01 L310218CSGSSBB010 11/17/2011 Soil < 6.75E-02 < 6.92E-02 8.97E+00 1.07E+00 4.35E-01 6.21E-02 3.38E-01 5.40E-02 < 1.56E-01

Attachment 1-5 10218B West Side of ISFSI Area Gam m a Spectroscopy Analysis Results (in pCi/g) 3/26/2012 Collection Sam ple 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s Sam ple ID Date Media Ac-228 Error Am -241 Error Co-60 Error Cs-134 Error Cs-137 Error Eu-154 Error L310218CSGSSSB011 11/17/2011 Soil 3.38E-01 1.38E-01 < 8.08E-02 < 7.22E-02 < 5.22E-02 7.72E-02 5.29E-02 < 1.67E-01 L310218CSGSSBB011 11/17/2011 Soil 4.31E-01 1.12E-01 < 8.43E-02 < 5.14E-02 < 3.44E-02 < 3.71E-02 < 1.37E-01 L310218CDGSSSB011 11/17/2011 Soil 4.26E-01 1.01E-01 < 6.92E-02 < 4.46E-02 < 2.89E-02 < 3.40E-02 < 1.10E-01 L310218CSGSSSB012 11/17/2011 Soil 2.96E-01 6.61E-02 < 4.50E-02 < 3.05E-02 < 2.14E-02 < 2.54E-02 < 7.32E-02 L310218CSGSSSB012 11/17/2011 Soil 2.58E-01 8.86E-02 < 6.13E-02 < 5.46E-02 < 3.95E-02 < 3.75E-02 < 1.26E-01 L310218CSGSSSB013 11/17/2011 Soil 3.64E-01 1.08E-01 < 6.32E-02 < 3.90E-02 < 2.70E-02 5.17E-02 2.46E-02 < 9.85E-02 L310218CSGSSBB013 11/17/2011 Soil 2.43E-01 6.45E-02 < 4.71E-02 < 3.13E-02 < 1.90E-02 < 2.76E-02 < 8.50E-02 L310218CSGSSSB014 11/17/2011 Soil 3.37E-01 1.32E-01 < 8.08E-02 < 7.58E-02 < 5.32E-02 < 7.74E-02 < 2.11E-01 L310218CSGSSBB014 11/17/2011 Soil 3.20E-01 6.98E-02 < 4.60E-02 < 3.25E-02 < 2.27E-02 6.28E-02 2.22E-02 < 7.52E-02 L310218CSGSSSB015 11/17/2011 Soil 3.35E-01 1.31E-01 < 7.42E-02 < 6.43E-02 < 4.71E-02 < 5.20E-02 < 1.68E-01 L310218CSGSSBB015 11/17/2011 Soil 2.52E-01 7.05E-02 < 5.33E-02 < 3.49E-02 < 2.38E-02 < 3.10E-02 < 8.00E-02 L310218CSGSSSB016 11/17/2011 Soil 1.87E-01 2.14E-01 < 8.53E-02 < 6.85E-02 < 5.93E-02 7.00E-02 4.69E-02 < 1.74E-01 L310218CSGSSBB016 11/17/2011 Soil 3.04E-01 7.23E-02 < 4.31E-02 < 3.03E-02 < 2.06E-02 < 3.20E-02 < 6.64E-02 L310218CSGSSSB017 11/17/2011 Soil 2.28E-01 7.07E-02 < 6.05E-02 < 3.93E-02 < 2.32E-02 8.41E-02 2.64E-02 < 8.67E-02 L310218CSGSSBB017 11/17/2011 Soil 4.11E-01 1.11E-01 < 7.32E-02 < 4.79E-02 < 3.61E-02 < 4.25E-02 < 1.22E-01 L310218CSGSSSB018 11/17/2011 Soil 2.32E-01 1.33E-01 < 6.75E-02 < 5.66E-02 < 4.53E-02 < 5.05E-02 < 1.44E-01 L310218CSGSSBB018 11/17/2011 Soil 2.81E-01 6.19E-02 < 4.79E-02 < 3.03E-02 < 2.12E-02 2.98E-02 2.68E-02 < 7.03E-02 L310218CSGSSSB019 11/17/2011 Soil 1.44E-01 1.38E-01 < 7.59E-02 < 6.86E-02 < 5.60E-02 5.19E-02 5.13E-02 < 2.13E-01 L310218CSGSSBB019 11/17/2011 Soil 3.31E-01 9.72E-02 < 8.40E-02 < 4.48E-02 < 3.20E-02 < 3.81E-02 < 1.14E-01 L310218CSGSSSB020 11/17/2011 Soil < 1.93E-01 < 6.35E-02 < 2.50E-02 < 2.60E-02 4.10E-02 2.60E-02 < 1.13E-01 L310218CSGSSBB020 11/17/2011 Soil < 2.58E-01 < 7.81E-02 < 5.80E-02 < 4.66E-02 < 5.30E-02 < 1.73E-01 3/26/2012 Collection Sam ple 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s Sam ple ID Date Media Eu-155 Error I-129 Error K-40 Error Pb-214 Error Tl-208 Error U-235 Error L310218CSGSSSB011 11/17/2011 Soil < 9.46E-02 < 8.33E-02 8.01E+00 1.30E+00 3.09E-01 7.76E-02 2.39E-01 8.14E-02 < 2.34E-01 L310218CSGSSBB011 11/17/2011 Soil < 9.30E-02 < 9.70E-02 8.57E+00 1.22E+00 4.30E-01 7.29E-02 2.90E-01 7.36E-02 < 1.90E-01 L310218CDGSSSB011 11/17/2011 Soil < 8.23E-02 < 7.14E-02 9.65E+00 1.28E+00 4.61E-01 6.48E-02 3.78E-01 7.02E-02 < 1.92E-01 L310218CSGSSSB012 11/17/2011 Soil < 5.71E-02 < 6.14E-02 6.30E+00 8.01E-01 2.92E-01 3.93E-02 2.35E-01 7.29E-02 < 1.44E-01 L310218CSGSSSB012 11/17/2011 Soil < 7.17E-02 < 6.60E-02 5.48E+00 9.58E-01 2.00E-01 5.67E-02 2.22E-01 7.29E-02 < 1.80E-01 L310218CSGSSSB013 11/17/2011 Soil < 8.04E-02 < 7.04E-02 5.68E+00 8.33E-01 3.41E-01 5.43E-02 2.38E-01 6.24E-02 < 1.68E-01 L310218CSGSSBB013 11/17/2011 Soil < 5.74E-02 < 5.90E-02 5.72E+00 7.38E-01 2.84E-01 4.24E-02 2.48E-01 5.19E-02 < 1.32E-01 L310218CSGSSSB014 11/17/2011 Soil < 1.00E-01 < 8.95E-02 6.98E+00 1.36E+00 3.29E-01 9.16E-02 2.21E-01 8.89E-02 < 2.37E-01 L310218CSGSSBB014 11/17/2011 Soil < 5.88E-02 < 6.34E-02 5.68E+00 7.38E-01 2.79E-01 4.20E-02 2.57E-01 5.10E-02 < 1.36E-01 L310218CSGSSSB015 11/17/2011 Soil < 7.87E-02 < 8.09E-02 8.32E+00 1.29E+00 2.71E-01 7.23E-02 2.56E-01 7.41E-02 < 2.11E-01 L310218CSGSSBB015 11/17/2011 Soil < 6.78E-02 < 7.36E-02 5.69E+00 7.68E-01 2.97E-01 4.34E-02 2.29E-01 5.51E-02 < 1.53E-01 L310218CSGSSSB016 11/17/2011 Soil < 9.91E-02 < 1.91E-01 7.83E+00 1.36E+00 3.27E-01 8.34E-02 2.54E-01 9.49E-02 < 2.47E-01 L310218CSGSSBB016 11/17/2011 Soil < 5.86E-02 < 6.61E-02 5.86E+00 7.67E-01 2.58E-01 4.25E-02 2.61E-01 7.76E-02 < 1.43E-01 L310218CSGSSSB017 11/17/2011 Soil < 6.04E-02 < 6.36E-02 6.78E+00 9.46E-01 2.80E-01 4.86E-02 2.19E-01 5.50E-02 < 1.63E-01 L310218CSGSSBB017 11/17/2011 Soil < 9.01E-02 < 1.12E-01 5.75E+00 8.88E-01 3.32E-01 6.35E-02 1.98E-01 7.49E-02 < 2.15E-01 L310218CSGSSSB018 11/17/2011 Soil < 7.71E-02 < 7.86E-02 7.47E+00 1.22E+00 2.22E-01 5.51E-02 3.48E-01 1.10E-01 < 1.98E-01 L310218CSGSSBB018 11/17/2011 Soil < 5.97E-02 < 6.62E-02 7.36E+00 9.03E-01 3.68E-01 4.89E-02 3.30E-01 7.70E-02 < 1.43E-01 L310218CSGSSSB019 11/17/2011 Soil < 9.09E-02 < 9.12E-02 5.32E+00 1.05E+00 1.71E-01 8.94E-02 2.26E-01 9.46E-02 < 2.24E-01 L310218CSGSSBB019 11/17/2011 Soil < 9.64E-02 < 9.05E-02 9.93E+00 1.34E+00 3.83E-01 6.67E-02 2.35E-01 7.17E-02 < 2.22E-01 L310218CSGSSSB020 11/17/2011 Soil < 7.80E-02 < 8.61E-02 6.10E+00 9.33E-01 2.47E-01 5.50E-02 1.73E-01 4.96E-02 < 1.68E-01 L310218CSGSSBB020 11/17/2011 Soil < 8.18E-02 < 7.74E-02 7.48E+00 1.18E+00 2.91E-01 5.74E-02 2.22E-01 7.56E-02 < 2.17E-01 5

Attachment 1-5 10218B West Side of ISFSI Area Gam m a Spectroscopy Analysis Results (in pCi/g) 3/26/2012 Collection Sam ple 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s Sam ple ID Date Media Ac-228 Error Am -241 Error Co-60 Error Cs-134 Error Cs-137 Error Eu-154 Error L310218CSGSSSB021 11/16/2011 Soil 3.00E-01 6.53E-02 < 4.99E-02 < 3.53E-02 < 2.41E-02 < 3.14E-02 < 7.87E-02 L310218CSGSSBB021 11/16/2011 Soil 3.28E-01 1.90E-01 < 6.92E-02 < 5.30E-02 < 4.71E-02 < 5.21E-02 < 1.30E-01 L310218CSGSSSB022 11/16/2011 Soil 1.85E-01 7.00E-02 < 5.00E-02 < 3.09E-01 < 2.18E-01 < 2.39E-02 < 8.12E-01 L310218CSGSSBB022 11/17/2011 Soil 3.07E-01 7.58E-02 < 5.31E-02 < 3.84E-02 < 2.26E-02 < 2.47E-02 < 9.88E-02 L310218CSGSSSB023 11/17/2011 Soil < 1.49E-01 < 5.04E-02 < 3.31E-02 < 1.79E-02 < 2.47E-02 < 8.95E-02 L310218CSGSSBB023 11/16/2011 Soil 3.29E-01 6.96E-02 < 4.70E-02 < 3.51E-02 < 2.12E-02 7.67E-02 2.58E-02 < 7.00E-02 L310218CSGSSSB024 11/16/2011 Soil 2.79E-01 7.92E-01 < 3.17E-02 < 2.74E-02 < 2.16E-02 2.97E-01 1.99E-01 < 7.63E-02 L310218CSGSSBB024 11/16/2011 Soil 3.01E-01 9.09E-02 < 6.88E-02 < 4.67E-02 < 2.85E-02 < 2.81E-02 < 9.99E-02 L310218CDGSSBB024 11/16/2011 Soil 3.13E-01 1.00E-01 < 6.80E-02 < 6.32E-02 < 4.26E-02 < 4.44E-02 < 1.56E-01 L310218CSGSSSB025 11/16/2011 Soil 2.89E-01 1.17E-01 < 5.48E-02 < 3.62E-02 < 2.20E-02 < 2.96E-02 < 9.00E-02 L310218CSGSSBB025 11/16/2011 Soil 2.36E-01 7.82E-02 < 5.54E-02 < 3.51E-02 < 2.25E-02 3.00E-02 2.50E-02 < 9.46E-02 L310218CSGSSSB026 11/16/2011 Soil 2.20E-01 6.39E-02 < 4.45E-02 < 3.30E-02 < 2.05E-02 < 2.17E-02 < 7.43E-02 L310218CSGSSBB026 11/16/2011 Soil 3.46E-01 1.18E-01 < 6.26E-02 < 3.70E-02 < 2.28E-02 < 2.78E-02 < 8.77E-02 L310218CSGSSSB027 11/17/2011 Soil 2.05E-01 7.16E-02 < 5.69E-02 < 5.19E-02 < 3.00E-02 < 3.12E-02 < 8.12E-02 L310218CSGSSBB027 11/17/2011 Soil 2.72E-01 6.75E-02 < 5.39E-02 < 2.87E-02 < 1.96E-02 3.39E-02 2.62E-02 < 6.67E-02 L310218CSGSSSB028 11/16/2011 Soil < 1.51E-01 < 5.29E-02 < 4.25E-02 < 3.44E-02 4.65E-02 3.13E-02 < 9.39E-02 L310218CSGSSBB028 11/16/2011 Soil 3.75E-01 1.07E-01 < 8.04E-02 < 6.61E-02 < 5.10E-02 < 5.97E-02 < 1.74E-01 L310218CSGSSSB029 11/16/2011 Soil 2.08E-01 7.75E-02 < 5.86E-02 < 4.49E-02 < 2.68E-02 2.91E-02 2.39E-02 < 1.09E-01 L310218CSGSSBB029 11/16/2011 Soil 2.85E-01 6.15E-02 < 0.0396 < 3.07E-02 < 1.89E-02 < 2.06E-02 < 7.56E-02 L310218CSPAAVB030 11/16/2011 Asphalt 2.04E-01 6.69E-02 < 5.50E-02 < 3.69E-02 < 2.58E-02 < 2.31E-02 < 8.73E-02 L310218CDPAAVB030 11/16/2011 Asphalt < 1.31E-01 < 4.57E-02 < 3.69E-02 < 2.48E-02 < 2.57E-02 < 8.99E-02 L310218CSGSSSB030 11/16/2011 Soil 3.45E-01 1.10E-01 < 6.61E-02 < 4.29E-02 < 2.99E-02 < 4.00E-02 < 1.26E-01 L310218CDGSSSB030 11/16/2011 Soil 3.13E-01 7.74E-02 < 5.52E-02 < 3.72E-02 < 2.39E-02 < 3.14E-02 < 1.02E-01 L310218CSGSSBB030 11/16/2011 Soil 3.79E-01 8.98E-02 < 6.87E-02 < 4.24E-02 < 2.67E-02 < 3.05E-02 < 9.91E-02 3/26/2012 Collection Sam ple 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s Sam ple ID Date Media Ac-228 Error Am -241 Error Co-60 Error Cs-134 Error Cs-137 Error Eu-154 Error L310218CSGSSSB021 11/16/2011 Soil < 6.26E-02 < 6.34E-02 9.17E+00 1.07E+00 3.69E-01 4.67E-02 2.66E-01 4.95E-02 < 1.48E-01 L310218CSGSSBB021 11/16/2011 Soil < 7.97E-02 < 7.35E-02 5.13E+00 9.66E-01 2.71E-01 7.16E-02 2.58E-01 7.90E-01 <. 2.01E-01 L310218CSGSSSB022 11/16/2011 Soil < 5.69E-02 < 5.30E-02 5.94E+00 8.19E-01 1.37E-01 3.15E-02 2.52E-01 5.15E-02 < 1.31E-01 L310218CSGSSBB022 11/17/2011 Soil < 6.93E-02 < 6.90E-02 9.59E+00 1.13E+00 3.95E-01 5.91E-02 2.94E-01 7.72E-02 < 1.65E-01 L310218CSGSSSB023 11/17/2011 Soil < 5.32E-02 < 6.55E-02 6.14E+00 8.16E-01 1.73E-01 4.32E-02 1.77E-01 4.65E-02 < 1.19E-01 L310218CSGSSBB023 11/16/2011 Soil < 5.82E-02 < 6.34E-02 6.97E+00 8.58E-01 2.57E-01 4.30E-02 2.37E-01 5.34E-02 < 1.38E-01 L310218CSGSSSB024 11/16/2011 Soil < 6.23E-02 < 5.23E-02 6.45E+00 8.75E-01 2.29E-01 3.87E-02 2.35E-01 5.02E-02 < 1.33E-01 L310218CSGSSBB024 11/16/2011 Soil < 7.61E-02 < 7.87E-02 5.71E+00 8.45E-01 2.17E-01 5.52E-02 2.23E-01 5.77E-02 < 1.50E-01 L310218CDGSSBB024 11/16/2011 Soil < 8.19E-02 < 7.75E-02 6.62E+00 1.11E+00 1.74E-01 6.38E-02 2.11E-01 8.28E-02 < 1.91E-01 L310218CSGSSSB025 11/16/2011 Soil < 6.62E-02 < 7.52E-02 5.04E+00 7.70E-01 2.24E-01 4.82E-02 < 1.34E-01 < 1.41E-01 L310218CSGSSBB025 11/16/2011 Soil < 6.34E-02 < 6.29E-02 7.27E+00 9.60E-01 2.26E-01 4.96E-02 2.20E-01 5.31E-02 < 1.32E-01 L310218CSGSSSB026 11/16/2011 Soil < 5.06E-02 < 5.57E-02 5.43E+00 7.31E-01 1.78E-01 3.62E-02 1.81E-01 4.22E-02 < 1.12E-01 L310218CSGSSBB026 11/16/2011 Soil < 5.65E-02 < 6.31E-02 9.56E+00 1.22E+00 3.96E-01 5.88E-02 3.01E-02 5.08E-02 < 1.60E-01 L310218CSGSSSB027 11/17/2011 Soil < 6.84E-02 < 8.42E-02 5.27E+00 8.45E-01 1.78E-01 5.60E-02 1.56E-01 5.45E-02 < 1.45E-01 L310218CSGSSBB027 11/17/2011 Soil < 6.52E-02 < 5.12E-02 9.08E+00 1.13E+00 3.30E-01 4.80E-02 2.40E-01 5.48E-02 < 1.43E-01 L310218CSGSSSB028 11/16/2011 Soil < 6.05E-02 < 5.58E-02 2.73E+00 5.74E-01 1.80E-01 5.00E-02 8.35E-02 5.52E-02 < 1.52E-01 L310218CSGSSBB028 11/16/2011 Soil < 9.02E-02 < 8.65E-02 8.36E+00 1.34E+00 3.56E-01 7.10E-02 2.92E-01 9.93E-02 < 2.29E-01 L310218CSGSSSB029 11/16/2011 Soil < 6.41E-02 < 7.35E-02 6.07E+00 8.49E-01 2.47E-01 4.75E-02 2.08E-01 4.78E-02 < 1.43E-01 L310218CSGSSBB029 11/16/2011 Soil < 5.15E-02 < 5.15E-02 6.80E+00 8.09E-01 2.25E-01 3.60E-02 2.55E-01 4.49E-02 < 1.28E-01 L310218CSPAAVB030 11/16/2011 Asphalt < 6.43E-02 < 7.54E-02 3.67E+00 6.33E-01 1.15E-01 4.58E-02 1.24E-01 4.78E-02 < 1.25E-01 L310218CDPAAVB030 11/16/2011 Asphalt < 5.45E-02 < 7.46E-02 3.74E+00 5.72E-01 1.46E-01 4.02E-02 1.26E-01 4.88E-02 < 1.39E-01 L310218CSGSSSB030 11/16/2011 Soil < 7.42E-02 < 7.99E-02 6.94E+00 9.84E-01 2.77E-01 5.89E-02 2.46E-01 6.61E-02 < 1.58E-01 L310218CDGSSSB030 11/16/2011 Soil < 6.85E-02 < 7.90E-02 7.59E+00 9.84E-01 2.73E-01 5.14E-02 2.24E-01 5.89E-02 < 1.61E-01 L310218CSGSSBB030 11/16/2011 Soil < 7.28E-02 < 7.50E-02 9.83E+00 1.24E+00 4.49E-01 6.25E-02 3.33E-01 6.62E-02 < 1.65E-01 6

Attachment 1-6 SU10218B West Side of ISFSI Duplicate Soil Samples

Attachment 1-6 10218B West Side of ISFSI Duplicate Com parison (in pCi/g) 3/27/2012 Duplicates: Ac-228 Uncertianty Cs-137 Uncertianty K-40 Uncertianty Pb-214 Uncertianty Tl-208 Uncertianty L310218CSGSSS-B002 3.82E-01 1.23E-01 9.08E-02 3.57E-02 9.76E+00 1.16E+00 4.46E-01 5.20E-02 3.28E-01 6.28E-02 L310218CDGSSS-B002 3.25E-01 8.64E-02 7.13E-02 2.52E-02 9.01E+00 1.18E+00 4.32E-01 5.55E-02 2.28E-01 5.92E-02 e/Uncertianty 3.11E+00 2.54E+00 8.41E+00 8.58E+00 5.22E+00 Resolution <4 <4 8-15 8-15 4-7 tance Criteria 0.4-2.5 0.4-2.5 0.6-1.66 0.6-1.66 0.5-2.0 mple/Duplicate 1.18E+00 Pass 1.27E+00 Pass 1.08E+00 Pass 1.03E+00 Pass 1.44E+00 Pass L310218CSGSSB-B011 4.31E-01 1.12E-01 < 3.71E-02 8.57E+00 1.22E+00 4.30E-01 7.29E-02 2.90E-01 7.36E-02 L310218CDGSSB-B011 4.26E-01 1.01E-01 < 3.40E-02 9.65E+00 1.28E+00 4.61E-01 6.48E-02 3.78E-01 7.02E-02 e/Uncertianty 3.85E+00 N/A 7.02E+00 5.90E+00 3.94E+00 Resolution <4 4-7 4-7 <4 tance Criteria 0.4-2.5 0.5-2.0 0.5-2.0 0.4-2.5 mple/Duplicate 1.01E+00 Pass 8.88E-01 Pass 9.33E-01 Pass 7.67E-01 Pass L310218CSGSSB-B024 3.01E-01 9.09E-02 < 2.81E-02 5.71E+00 8.45E-01 2.17E-01 5.52E-02 2.23E-01 5.77E-02 L310218CDGSSB-B024 3.13E-01 1.00E-01 < 4.44E-02 6.62E+00 1.11E+00 1.74E-01 6.38E-02 2.11E-01 8.28E-02 e/Uncertianty 3.31E+00 N/A 6.76E+00 3.93E+00 3.86E+00 Resolution <4 4-7 <4 <4 tance Criteria 0.4-2.5 0.5-2.0 0.4-2.5 0.4-2.5 mple/Duplicate 9.62E-01 Pass 8.63E-01 Pass 1.25E+00 Pass 1.06E+00 Pass L310218CSPAAV-B030 2.04E-01 6.69E-02 < 2.31E-02 3.67E+00 6.33E-01 1.15E-01 4.58E-02 1.24E-01 4.78E-02 L310218CDP < 1.31E-01 < 2.57E-02 3.74E+00 5.72E-01 1.46E-01 4.02E-02 1.26E-01 4.88E-02 e/Uncertianty 3.05E+00 N/A 5.80E+00 2.51E+00 2.59E+00 Resolution <4 4-7 <4 <4 tance Criteria 0.4-2.5 0.5-2.0 0.4-2.5 0.4-2.5 mple/Duplicate 1.56E+00 Pass 9.81E-01 Pass 7.88E-01 Pass 9.84E-01 Pass L310218CSGSSS-B030 3.45E-01 1.10E-01 < 4.00E-02 6.94E+00 9.84E-01 2.77E-01 5.89E-02 2.46E-01 6.61E-02 L310218CDGSSS-B030 3.13E-01 7.74E-02 < 3.14E-02 7.59E+00 9.84E-01 2.73E-01 5.14E-02 2.24E-01 5.89E-02 e/Uncertianty 3.14E+00 N/A 7.05E+00 4.70E+00 3.72E+00 Resolution <4 Acceptance 4-7 4-7 <4 tance Criteria 0.4-2.5 Resolution Criteria 0.5-2.0 0.5-2.0 0.4-2.5 mple/Duplicate 1.10E+00 Pass <4 0.40-2.50 9.14E-01 Pass 1.01E+00 Pass 1.10E+00 Pass 4-7 0.5-2.00 8-15 0.60-1.66 16-50 0.75-1.33 51-200 0.80-1.25

>200 0.85-1.18 8

Attachment 1-7 SU10218B West Side of ISFSI Hard-To-Detect Radionuclide Analysis Results

Attachment 1-7 10218B West Side of ISFSI HTD Sam ple results (in pCi/g) 3/26/2012 Collection Sample 2.0 s 2.0 s 2.0 s 2.0 s Sample ID Date Media H-3 Uncertianty Fe-55 Uncertianty Ni-63 a Uncertianty Sr-90 a Uncertianty L310218CSGSSSB008 11/17/2011 Soil < 7.03E-01 < 2.61E-01 < 2.35E-01 < 1.34E-01 L310218CSGSSBB008 11/17/2011 Soil < 7.14E-01 < 2.59E-01 < 2.25E-01 1.27E-01 4.89E-02 L310218CSGSSSB013 11/17/2011 Soil < 7.10E-01 < 1.88E-01 < 2.46E-01 5.62E-01 8.90E-02 L310218CSGSSBB013 11/17/2011 Soil < 7.00E-01 < 2.56E-01 3.98E-01 1.51E-01 < 1.42E-01 L310218CSGSSSB020 11/17/2011 Soil < 7.33E-01 < 2.64E-01 2.99E-01 3.83E-01 8.67E-02 L310218CSGSSBB020 11/17/2011 Soil < 7.19E-01 < 2.38E-01 < 1.39E-01 < 1.34E-01 L310218CSGSSSB024 11/16/2011 Soil < 7.19E-01 < 2.87E-01 < 2.29E-01 1.66E-01 7.65E-02 L310218CSGSSBB024 11/16/2011 Soil < 7.19E-01 < 2.74E-01 < 2.30E-01 < 1.06E-01 L310218CDGSSSB024 11/16/2011 Soil < 6.98E-01 < 2.45E-01 < 2.26E-01 < 1.33E-01 L310218CSGSSSB028 11/16/2011 Soil < 7.02E-01 < 2.05E-01 3.74E-01 1.87E-01 2.01E-01 7.85E-02 L310218CSGSSBB028 11/16/2011 Soil < 6.99E-01 < 2.83E-01 < 2.32E-01 1.68E-01 6.60E-02 a

As per communications w ith the vendor laboratory the positive results noted f or Ni-63 and Sr-90 are due to method noise (noise level equivalent) and are therefore f alse positives.

10

Attachment 1-8 SU10218C Asphalt Roadway South of Switchyard Gamma Spectroscopy Analysis

Attachment 1-8 10218C Gamma Spectroscopy Analysis Results (in pCi/g) 2/27/2012 Collection Sample 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s Sample ID Date Media Ac-228 Error Am-241 Error Co-60 Error Cs-134 Error Cs-137 Error Eu-154 Error L310218CJPAAVC001 11/15/2011 Asphalt 1.44E-01 5.17E-02 < 4.03E-02 < 2.23E-02 < 1.69E-02 < 1.98E-02 < 6.06E-02 L310218CJGSSSC001 11/15/2011 Gravel/Soil < 8.25E-02 < 2.83E-02 < 2.11E-02 < 1.19E-02 < 1.55E-02 < 4.42E-02 L310218CJGSSBC001 11/15/2011 Gravel/Soil < 1.66E-01 < 5.33E-02 < 3.82E-02 < 2.28E-02 < 2.46E-02 < 1.04E-01 L310218CJPAAVC002 11/15/2011 Asphalt 1.43E-01 4.76E-02 < 3.84E-02 < 2.49E-02 < 1.64E-02 < 1.92E-02 < 5.64E-02 L310218CJGSSSC002 11/15/2011 Gravel/Soil < 1.11E-01 < 3.24E-02 < 2.41E-02 < 1.45E-02 < 1.78E-02 < 5.06E-02 L310218CJGSSBC002 11/15/2011 Gravel/Soil 3.56E-01 1.00E-01 < 6.69E-02 < 4.75E-02 < 4.50E-02 < 4.31E-02 < 1.33E-01 L310218CJPAAVC003 11/15/2011 Asphalt 1.45E-01 4.35E-02 < 3.98E-02 < 2.31E-02 < 1.96E-02 < 1.72E-02 < 5.34E-02 L310218CJGSSSC003 11/15/2011 Gravel/Soil 2.43E-01 4.37E-02 < 3.56E-02 < 2.22E-02 < 1.53E-02 < 1.82E-02 < 5.66E-02 L310218CJGSSBC003 11/15/2011 Gravel/Soil 2.12E-01 4.94E-02 < 4.50E-02 < 3.09E-02 < 2.06E-02 9.86E-03 1.21E-02 < 8.13E-02 L310218CJPAAVC004 11/16/2011 Asphalt < 1.83E-01 < 5.17E-02 < 4.85E-02 < 3.66E-02 < 4.12E-02 < 1.26E-01 L310218CJGSSSC004 11/16/2011 Gravel/Soil 2.43E-01 5.60E-02 < 4.22E-02 < 2.46E-02 < 1.44E-02 2.22E-02 1.70E-02 < 6.33E-02 L310218CJGSSBC004 11/16/2011 Gravel/Soil 2.10E-01 7.63E-02 < 5.37E-02 < 3.14E-02 < 2.25E-02 < 2.52E-02 < 8.20E-02 L310218CJPAAVC005 11/16/2011 Asphalt 2.31E-01 8.29E-02 < 5.39E-02 < 5.24E-02 < 3.60E-02 < 4.05E-02 < 1.27E-01 L310218CJGSSSC005 11/16/2011 Gravel/Soil 2.37E-01 4.05E-02 < 2.91E-02 < 1.82E-02 < 1.31E-02 < 1.58E-02 < 4.88E-02 L310218CJGSSBC005 11/16/2011 Gravel/Soil 2.02E-01 5.69E-02 < 4.49E-02 < 2.48E-02 < 1.65E-02 < 2.11E-02 < 6.79E-02 L310218CJPAAVC006 11/16/2011 Asphalt 1.90E-01 9.70E-02 < 5.26E-02 < 3.56E-02 < 3.17E-02 < 3.88E-02 < 1.34E-01 L310218CJGSSSC006 11/16/2011 Gravel/Soil 1.92E-01 4.48E-02 < 2.93E-02 < 2.18E-02 < 1.32E-02 < 1.60E-02 < 5.19E-02 L310218CJGSSBC006 11/16/2011 Gravel/Soil < 2.31E-01 < 4.81E-02 < 2.78E-02 < 1.94E-02 3.16E-02 2.42E-02 < 7.28E-02 10218C Gamma Spectroscopy Analysis Results (in pCi/g) Continued Collection Sample 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s Sample ID Date Media Eu-155 Error I-129 Error K-40 Error Pb-212 Error Tl-208 Error U-235 Error L310218CJPAAVC001 11/15/2011 Asphalt < 4.64E-02 < 4.62E-02 3.54E+00 5.40E-01 1.56E-01 3.84E-02 1.15E-01 3.34E-02 < 1.07E-01 L310218CJGSSSC001 11/15/2011 Gravel/Soil < 3.45E-02 < 3.66E-02 4.74E+00 5.66E-01 1.89E-01 3.81E-02 1.34E-01 3.06E-02 < 8.42E-02 L310218CJGSSBC001 11/15/2011 Gravel/Soil < 6.34E-02 < 6.37E-02 7.76E+00 9.93E-01 3.05E-01 4.39E-02 2.09E-01 5.00E-02 < 1.35E-01 L310218CJPAAVC002 11/15/2011 Asphalt < 4.78E-02 < 4.40E-02 3.69E+00 5.63E-01 1.54E-01 2.87E-02 1.21E-01 3.28E-02 < 1.05E-01 L310218CJGSSSC002 11/15/2011 Gravel/Soil < 4.13E-02 < 4.33E-02 5.67E+00 6.77E-01 2.25E-01 3.76E-02 1.57E-01 3.37E-02 < 9.55E-02 L310218CJGSSBC002 11/15/2011 Gravel/Soil < 7.98E-02 < 6.58E-02 7.34E+00 1.14E+00 2.63E-01 4.96E-02 2.80E-01 7.49E-02 < 1.95E-01 L310218CJPAAVC003 11/15/2011 Asphalt < 4.70E-02 < 4.32E-02 3.21E+00 5.33E-01 1.62E-01 2.90E-02 1.22E-01 3.60E-02 < 1.14E-01 L310218CJGSSSC003 11/15/2011 Gravel/Soil < 4.63E-02 < 4.39E-02 5.38E+00 6.73E-01 2.11E-01 3.18E-02 1.80E-01 4.16E-02 < 1.17E-01 L310218CJGSSBC003 11/15/2011 Gravel/Soil < 4.97E-02 < 5.41E-02 5.15E+00 7.15E-01 2.01E-01 3.25E-02 1.48E-01 4.02E-02 < 1.11E-01 L310218CJPAAVC004 11/16/2011 Asphalt < 6.54E-02 < 5.91E-02 3.49E+00 6.94E-01 1.14E-01 4.02E-02 1.08E-01 4.80E-02 < 1.55E-01 L310218CJGSSSC004 11/16/2011 Gravel/Soil < 3.81E-02 < 4.10E-02 6.23E+00 8.05E-01 2.23E-01 3.26E-02 1.82E-01 4.04E-02 < 1.10E-01 L310218CJGSSBC004 11/16/2011 Gravel/Soil < 5.93E-02 < 5.98E-02 6.36E+00 8.49E-01 2.61E-01 4.09E-02 2.21E-01 5.13E-02 < 1.31E-01 L310218CJPAAVC005 11/16/2011 Asphalt < 6.15E-02 < 6.08E-02 3.40E+00 7.22E-01 1.30E-01 5.30E-02 1.22E-01 5.61E-02 < 1.59E-01 L310218CJGSSSC005 11/16/2011 Gravel/Soil < 3.64E-02 < 3.66E-02 4.93E+00 5.83E-01 1.97E-01 2.71E-02 1.69E-01 3.29E-02 < 8.85E-02 L310218CJGSSBC005 11/16/2011 Gravel/Soil < 5.57E-02 < 4.53E-02 6.68E+00 8.75E-01 2.47E-01 3.61E-02 1.62E-01 4.17E-02 < 1.28E-01 L310218CJPAAVC006 11/16/2011 Asphalt < 6.06E-02 < 5.71E-02 3.09E+00 6.55E-01 1.60E-01 5.64E-02 1.45E-01 4.98E-02 < 1.55E-01 L310218CJGSSSC006 11/16/2011 Gravel/Soil < 3.97E-02 < 3.98E-02 4.89E+00 5.89E-01 2.11E-01 2.81E-02 1.32E-01 3.19E-02 < 8.98E-02 L310218CJGSSBC006 11/16/2011 Gravel/Soil < 5.79E-02 < 5.15E-02 6.10E+00 8.50E-01 2.45E-01 3.74E-02 2.40E-01 5.73E-02 < 1.29E-01

Attachment 1-9 SU10218D Mix Plant Foundation Concrete Cores Gamma Spectroscopy Analysis

Attachment 1-9 a Spectroscopy Analysis Results (in pCi/g)

Sample 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s Media Ac-228 Error Am-241 Error Co-60 Error Cs-134 Error Cs-137 Error Eu-154 Error Concrete 2.46E-01 6.93E-02 < 5.20E-02 < 3.31E-02 < 2.16E-02 < 2.32E-02 < 8.72E-02 Concrete < 2.57E-01 8.49E-02 < 6.41E-02 < 5.14E-02 < 3.82E-02 < 3.92E-02 < 1.45E-01 a Spectroscopy Analysis Results (in pCi/g)

Sample 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s Media Eu-155 Error I-129 Error K-40 Error Pb-212 Error Tl-208 Error U-235 Error Concrete < 6.00E-02 < 5.77E-02 4.42E+00 6.69E-01 2.26E-01 3.62E-02 2.26E-01 5.03E-02 < 1.27E-01 Concrete < 7.29E-02 < 6.92E-02 4.26E+00 8.06E-01 2.12E-01 5.28E-02 2.24E-01 7.14E-02 < 1.80E-01

Attachment 1-10 SU10218E Hazardous Waste Storage Pad Concrete Cores Gamma Spectroscopy Analysis

Attachment 1-10 e Storage Pad Gamma Spectroscopy Analysis Results (in pCi/g) sis is based on samples collected from the pad in in August of 2011)

Collection Sample 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s Date Media Ac-228 Error Am-241 Error Co-60 Error Cs-134 Error Cs-137 Error Eu-154 Error 8/162012 Concrete 3.21E-01 1.80E-01 < 9.70E-02 < 6.73E-02 < 5.03E-02 < 5.91E-02 < 1.68E-01 8/162012 Concrete < 2.81E-01 < 9.97E-02 < 6.03E-02 < 4.86E-02 < 6.18E-02 < 1.43E-01 8/162012 Concrete 1.75E-01 7.25E-02 < 5.82E-02 < 4.01E-02 < 3.72E-02 < 4.30E-02 < 1.26E-01 e Storage Pad Gamma Spectroscopy Analysis Results (in pCi/g) sis is based on samples collected from the pad in in August of 2011)

Collection Sample 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s Date Media Eu-155 Error I-129 Error K-40 Error Pb-212 Error Tl-208 Error U-235 Error 8/162012 Concrete < 1.13E-01 < 1.07E-01 6.81E+00 1.29E+00 3.72E-01 7.70E-02 2.20E-01 9.32E-02 < 2.64E-01 8/162012 Concrete < 1.14E-01 < 1.25E-01 8.00E+00 1.39E+00 4.46E-01 8.22E-02 2.20E-01 8.42E-02 < 2.65E-01 8/162012 Concrete < 7.09E-02 < 8.24E-02 8.21E+00 4.42E-01 < 6.93E-02 < 1.35E-01 < 1.92E-01

Characterization of the Zion Station Independent Spent Fuel Storage Facility (ISFSI)

July 30, 2012 Prepared By: Signature on File Date 7/30/12 Robert F. Decker LTP Radiological Engineering Manager ZionSolutions, LLC Reviewed By: Signature on File Date 7/30/12 Steve Horvath Characterization/License Termination Manager ZionSolutions, LLC

Introduction As part of the Zion Station Restoration Project (ZSRP) all reactor fuel and greater than Class C (GTCC) waste will be placed into casks and transferred to an Independent Spent Fuel Storage Installation (ISFSI) that is to be constructed at the Zion Station site. It is expected that the fuel will remain in dry storage within the ISFSI until it is transferred to the Department of Energy (DOE). The ISFSI will be constructed in the southwest corner of the Zion Nuclear Station, immediately south of the Switchyard. Figure 1-1 presents the approximate location.

Radiological surveys were conducted of the ISFSI area that is to be impacted by the construction process as part of the ISFSI radiological characterization. The survey design focused primarily on the surface and subsurface soil associated within the region. The characterization survey was designed to meet the general requirements of a final status survey in accordance with NUREG-1575 Rev. 1, the Multi-Agency Radiation Survey and Site Investigation Manual (MARSSIM).

Scope A survey plan was developed for the ISFSI (Attachment 1-1) that included the following survey and assessment attributes:

• Data Quality Objectives

• Radionuclides of Concern

• Survey Area

• Survey Design and Methodology

• Sampling Methodology

• Instrumentation

• Sample Handling and Analysis

• Minimum Detectable Concentrations

• Quality Assurance and Quality Control

• Chain of Custody

• Characterization of Survey Data The survey region comprises an area of 23,118 m2. Within the region are two concrete pads and an asphalt roadway that is located immediately south of the Switchyard. The survey area was initially divided into two separate surveys units (10218A and 10218B). The asphalt roadway and two concrete pads within the two survey units were assigned separate survey unit designations (10218C, 10218D and 10218E). The Historical Site Assessment has classified (in accordance with MARSSIM) the survey units in this survey region as Class 3. There are no reasons to classify the associated survey units otherwise.

The assigned survey unit designations and surface area are provided in Table 1-1.

2

Figure 1-1 ISFSI Survey Area Table 1-1 ISFSI Survey Units Survey Unit Type Area (m2) Class 10218A (ISFSI East) Open Land 11,559.0 3 10218B (ISFSI West) Open Land 11,559.0 3 10218C (Asphalt Roadway) Asphalt Roadway 467.5 3 10218D (Mix Plant Pad) Concrete Pad 131.1 3 10218E Concrete Pad 105.4 3 (Hazardous Waste Storage Pad)

Table 1-2 summarizes the surveys and sampling protocols that were conducted in each survey unit. The table does not include information on duplicate samples or investigations that were performed. This information is included in the sections designated for each separate survey unit. It is important to note 3

that the number of samples and survey measurements collected for each of the ISFSI survey units exceed the requirements for a MARSSIM Class 3 survey where the and decision levels are both set at 0.05.

Table 1-2 ISFSI Surveys Survey Unit Media Scan Direct Surface Subsurface SU Area (m2) Asphalt Concrete Gamma Beta Beta Soil* Soil 10218A 11,559.0 N/A N/A 30 30 50% N/A N/A 10218B 11,559.0 N/A N/A 30 30 50% N/A N/A 10218C 467.5 6 N/A 6** 6 50% 23% 20 10218D 131.1 N/A 2 N/A N/A 50% 22% 20 10218E 105.4 N/A 3 N/A N/A 20% 23% 20

• Media collected immediately below the asphalt roadway were designated as surface soil.

All soil, asphalt and concrete samples were subjected to gamma spectroscopy analysis (HPGe). The MDC for the principal gamma-emitting radionuclides (Co-60 and Cs-137) was 0.1 pCi/g. Ten percent of all the soil samples collected were subjected to analysis for the Hard-to-Detect (HTD) radionuclides: Fe-55, Ni-63 and Sr-90. The MDC for the HTD radionuclides was 0.1 pCi/g. Sample analysis results are located in Attachments 1-2 through 1-10 of this document.

Process Surveys and sampling protocols were modeled after the ZionSolutions Draft Characterization Survey Package procedure (ZS-RP-107-001-001 Rev 0). This approach was intended to both capture the attributes required for site characterization and include the features that are necessary for final status surveys. In addition, the measures were intended as test cases for proofing the draft procedure. Survey and sample size determinations were based on the guidance provided by MARSSIM for Class 3 areas.

The survey package for each survey unit consists of:

• Cover sheet o Survey unit designation and name o Type of survey o Classification and, o Review and approval

• Survey Unit (SU) Walk-Down Form o Noting potential hazards o Hazards mitigation o Required preparations o SU classification.

4

• Characterization and Survey Design o SU description o Survey area size o Surfaces and media to be collected o Historical information o Number of measurements and samples to be acquired o Instrumentation required and associated MDC o Sample analysis to be performed and associated MDC o Description of types of samples and surveys o Replicate sample requirements o Scan coverage and justification o Survey instructions and sample identification codes Implementation Following development of the ISFSI Characterization Survey Plan individual survey packages were prepared for each survey unit. A Radiological Engineer/Supervisor from the EnergySolutions Commercial Services Group implemented the plan and individual survey packages. The EnergySolutions Commercial Service Group managed the contracts with the vendors used to support the characterization effort. The vendor support included:

• Asphalt and concrete core collection using core-bores.

• Surface and subsurface soil sampling using direct-push technology.

• Off site gamma spectroscopy and HTD radionuclide analysis of asphalt, concrete and soil samples.

Prior to performing surveys and sampling the responsible personnel were provided training by the EnergySolutions Radiological Engineer/Supervisor relative to the survey instruments to be used in performing the sampling and surveys and the associated procedures. The procedures provided by EnergySolutions were:

• CS-FO-PR-001 Performance of Radiological Surveys

• CS-FO-PR-002 Calibration and Maintenance of Radiological Survey Instruments

• CS-FO-PR-003 Soil Surveys, Collection of Water, Sediment, Vegetation, and Soil Samples; and Chain of Custody

• CS-FO-PR-004 QA/QC of Portable Radiological Survey Instruments

• CS-FO-PR-005 General Operation of Radiological Survey Instruments Daily safety meetings were also conducted by the EnergySolutions Radiological Engineer/Supervisor.

In addition to the above training the responsible ZionSolutions Radiological Engineer provided training to the technicians, EnergySolutions personnel and core bore/direct-push vendors on the survey packages, sampling, survey documentation, instrument response, and instrument alarm set points relative to each survey package. This training was performed in accordance with ZionSolutions Procedure ZS-TQ-100-008, Training Briefs. The Training Briefs are:

• ZS-FT-ISF-TRBR-002 Review of ISFSI Survey Instruction Package SU10218A, 11/8/11 5

• ZS-FT-ISF-TRBR-003 Review of ISFSI Survey Instructions Packages SU10218B, 10218C and 10218D 11/15/11

• ZS-FT-ISF-TRBR-004 Review of ISFSI Survey Instructions Package SU10218E 1/9/12 Survey locations for concrete cores, asphalt cores and soil samples were both judgmental and systematically selected. As practical, GPS technology was used to identify and plot the sample locations.

Figure 1-2 presents the sample locations for ISFSI Survey Units 10218A and 10218B. Sampling and measurement locations are provided for each survey unit in the individual survey unit sections of this document.

Figure 1-2 SU10218A and SU10218B Soil Sample Locations 6

SU10218A East Side of ISFSI (11,599 m2)

Gamma Scan Survey Gamma scan surveys were conducted over 50% of the survey unit. The measurements were conducted by dividing the width of the survey area into one meter survey lanes and assuming that the survey pattern covers a lane width of approximately 0.5 meters. The basis results in scan coverage of 5,780 m2. The instrument used was a Ludlum 2350-1 data logger coupled to a Ludlum Model 44-10 NaI detector. The detector end-cap was maintained at less than 8.0 cm from the soil surface and a scan speed of 0.25 m/s was used. This survey methodology was based on a soil MDC of 4.16 pCi/g for Cs-137. That is, the instrument and surveyors ability to detect 4.16 pCi/g of Cs-137 in the top 15 cm layer of soil. The model assumes a contaminated region 50 cm in diameter. Alarm set points were determined based on preliminary background surveys that were conducted prior to performing gamma scans. The gamma scans for SU10218A were performed using the Ludlum Model 2350-1 and Model 44-10 detector connected to a GPS unit. The instrument register was interrogated every second and a packet of count rate data was stored with the GPS coordinates. The downloaded data was used to create a plot of the survey locations relative to detector count rate. A total of 26,616 data points were recorded. A real time plot of the detector location and cpm data was overlaid on a map of the survey area. Figure 1-3 presents the plot and general statistics associated with the gamma scan survey. In addition to collection of data every one second during the survey the surveyor listens for an increase in count rate that could indicate a region of elevated activity. For any increase in count rate the surveyor slows the scan speed or stops and determines if an increase in count rate has occurred and flags or otherwise marks the area for further investigation. An instrument alarm requires that the suspect alarm region is resurveyed and if a second alarm occurred the area is marked for further investigation.

The gamma scan MDC value, 4.16 pCi/g was derived by assuming a radionuclide soil mixture of 10.0%

Co-60 and 90.0% Cs-137. The assumed soil derived concentration guidelines (DCGL) is based on the NRC Screening Levels found in both Table H-2 of NUREG-1757 Volume 2 Revision 1, Appendix H, and Table 6.91 (Pcrit = 0.10) of NUREG-5512 Volume 3. The listed DCGLs for Co-60 and Cs-137 are 3.8 and 11.0 pCi/g, respectively. Cs-137 is used as the surrogate radionuclide and formula 11-4 from NUREG-1505, Chapter 11was used to determine the surrogate relationship.

and, then, and, Where 50% of the assumed Cs-137surrogate DCGL is 4.16 pCi/g.

7

The assumed Cs-137surrogate DCGL is conservative relative to the expected pathway scenarios at the Zion Station Restoration Project. Figures 1-4 and 1-5 are bar graphs of the gamma scans conducted in SU 10218A. Figure 1-4 displays the cpm frequency for the 26,616 data points collected. Figure 1-5 presents the density of data for the count rates displayed in Figure 1-4. Based on the summary results of Figure 1-3 the observed maximum measured value is ~7400 cpm and relates to an MDC of 4.6 pCi/g Cs-137.

Figure 1-3 SU10218A Gamma Scan Plot 8

Figure 1-4 SU10218A Count Rate frequency (in cpm)

SU 10218A ISFSI East Gamma Scan 6000 1400-1800 5000 1800-2200 2200-2600 4000 2600-3000 3000-3400 frequency 3000 3400-3800 3800-4200 2000 4200-4600 4600-5000 1000 5000-5400 5400-5800 0 5800-6200 1 6600-7000 Data in Interval 7000-7400 Figure 1-5 SU10218A Count Rate Sample Density SU 10218A ISFSI East Gamma Scan 25 4

76 20 404 1037 Frequency (%)

2177 15 3197 3850 10 5504 5267 2932 5 1589 455 99 0

18 1

6 Data in Interval 1 9

Figure 1-6 SU10218A Frequency Chart 1 and 3rd Quartile, 26.616 Measurements st 10218A ISFSI East Gamma Scan Results 8,000 7,000 6,000 0.75 quartile 5,000 cpm 4,000 0.25 quartile 3,000 2,000 1,000 0

0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 frequency Figure 1-6 presents the first (0.25) and third (0.75) quartile of the 26,616 measurements. The measurement results are commensurate with the quartile (cpm) values provided in Figure 1-3.

Gamma scans were also conducted underneath randomly selected Vehicle Barrier System (VBS) barriers located along the switchyard parameter. The scans did not identify any areas of elevated activity. The observed gamma scan count rates ranged from 3,700 to 4,800 cpm that is indicative of surface soil MDCs for Cs-137 that range from of 2.3 to 3.6 pCi/g. It is important to note that the observed cpm range is due to the area background and not Cs-137 soil contamination.

Gamma Scan Investigations The gamma scan surveys did not identify any significant areas of elevated activity. Alarm set points were exceeded over a single area of approximately 23.2 m2. While it is expected that the instrument alarms were due to an increase in the local area background an investigation of the region was performed.

Additional gamma scan surveys were conducted using a Ludlum 2350-1 data logger and 44-10 NaI detector. Two surface and one subsurface soil samples were collected from regions of the highest scan measurement. Vendor laboratory results showed positive values for Cs-137 ranged from 0.11to 0.12 pCi/g for both of the surface soil samples. The positive results for Cs-137 were about 40% higher than any other analytical result for Cs-137 in SU10218A. The observed activity concentrations are not atypical of Cs-137 levels due to world-wide fallout in undisturbed soils. The vendor analysis also reported higher K-40 concentration (15.0 pCi/g) for these surface soil samples. These results were about 27% higher than any other K-40 result reported for the survey unit. The soil samples collected during the investigation were also analyzed for hard-to detect radionuclides expected to be predominant in the Zion Station plant-derived activity; these included Fe-55, Ni-63 and Sr-90. No positive results for these hard-to-detect radionuclides were observed. With the exception of the above noted Cs-137 results (that are expectedly due to world-wide fallout) no plant-derived activity was observed.

10

Soil Sampling Survey unit 10218A comprises an area of 11,559 m2. A total of 30 surface and 30 subsurface soil samples were collected from this survey location. Surface samples consist of the first 15.0 cm of soil.

Subsurface samples consist of samples collected over the next 15.0 to 100 cm of soil depth. If systematic soil sample locations fell on the asphalt roadway the asphalt media was also analyzed and the surface soil sample was collected from the media located directly below the asphalt.

All samples were subjected to gamma spectroscopic analysis (HPGe). Ten percent of the samples were analyzed for the HTD radionuclides Fe-55, Ni-63 and Sr-90. These HTD radionuclides have been observed in the10CFR61 sampling of the Zion Station radiological waste streams.

With the exception of Cs-137 vendor analysis results for the submitted samples did not identify any plant-derived radionuclides. Of the 68 samples analyzed for SU10218A Cs-137 was positively identified in 26 of the samples. The Cs-137 concentration ranged from 1.22E-02 to 1.16E-01 pCi/g. The mean Cs-137 concentration for the positive soil results reported is 4.80E-02 pCi/g. The mean Cs-137 concentration for all the soil samples was determined to be 4.12E-02 pCi/g. These values are consistent with Cs-137 world-wide fallout concentrations for disturbed soils.

Vendor soil results for SU10218A are provided in Attachment 1-2 for the following radionuclides: Ac-228, Am-241, Co-60, Cs-134, Cs-137, Eu-154, Eu-155, I-129, K-40, Pb-214, Tl-208 and U-235.

Duplicate Samples Duplicate media samples from four sample locations were evaluated. Sample comparisons were performed for the following radionuclides: Ac-228, Cs-137, K-40, Pb-2124 and Tl-208. Radionuclides reported at MDC levels are not evaluated. The evaluation method is provided in Section 4.2.2 of the ZionSolutions Quality Assurance Project Plan (for Characterization and FSS). Duplicate samples were randomly selected. The evaluation results are provided in Attachment 1-3. All sample comparisons for the radionuclides subjected for duplicate sample evaluation passed the test criteria found in the Quality Assurance Project Plan.

Hard-to-Detect Radionuclide Analysis As previously stated, ten percent of the media samples were submitted for hard-to-detect radionuclide analysis. HTD samples were randomly selected from the sample population with the exception of samples collected from areas requiring investigations. Vendor analysis was performed for Fe-55, Ni-63 and Sr-90. No HTD radionuclides were observed in the submitted samples. The results for these samples are presented in Attachment 1-4.

SU10218B West Side of ISFSI (11,599 m2)

Gamma Scan Survey Survey unit 10218B comprises an area of 11,559 m2. Gamma scan surveys were conducted over 50% of the survey unit. The measurements were conducted by dividing the width of the survey area into one meter survey lanes and assuming that the survey pattern covers a lane width of approximately 0.5 meters.

The basis results in scan coverage of 5,780 m2. The instrument used was a Ludlum 2350-1 data logger 11

coupled to a Ludlum Model 44-10 NaI detector. The detector end-cap was maintained at less than 8.0 cm from the soil surface and a scan speed of 0.25 m/s was used. This survey methodology was based on a soil MDC of 4.16 pCi/g for Cs-137. That is, the instrument and surveyors ability to detect 4.16 pCi/g of Cs-137 in the top 15 cm layer of soil. The model assumes a contaminated region 50 cm in diameter. The 4.16 pCi/g Cs-137 MDC derivation is the same as that provided for SU 10218A. Alarm set points were determined based on preliminary background surveys that were conducted prior to performing gamma scans. During the scanning process the surveyor listens for any increase in the instrument count rate. If an increase in instrument count rate occurs the surveyor slows or stops the survey in order to determine if the increased count rate is indicative of a region of elevated activity. Suspect areas are marked for later investigation. If instrument alarms occurred the surveyor stopped the survey and resurveyed the region where the alarm was suspected to have occurred. If a second alarm occurs the suspect region is marked for later investigations. The instrument gamma scans for SU 10218B were conducted with the instrument operating in the latching mode. In this configuration the instrument stores the highest measurement in memory until the memory location is reset. In this mode the surveyors are provided a visual indication of the maximum count rate for a given region of the lane being surveyed. The maximum count rate (latching mode value) was saved for every 8 to 10 linear meters of travel during the survey process. The downloaded data was used to create a plot of the survey detector count rates over the survey unit (The same information can be used to locate a specific region where the saved measurement occurred). A total of 1,670 data points were recorded. Figure 1-5 presents a bar graph of the count rate frequency for the survey results. Table 1-3 lists the general statistics associated with the recorded measurements.

Figure 1-5 SU10218B Count Rate Frequency (in cpm) 18.00 3200-3400 16.00 3400-3600 3600-3800 14.00 3800-4000 4000-4200 12.00 4200-4400 4400-4600 Frequency (%)

10.00 4600-4800 4800-5000 5000-5200 8.00 5200-5400 5400-5600 6.00 5600-5800 5800-6000 4.00 6000-6200 6200-6400 2.00 6400-6600 6600-6800 0.00 6800-7000 cpm ==>

12

Table 1-3 SU10218B General Statistics, Gamma Scan Measurements Count 1670.0 Skewness -0.1561 Minimum 3228.0 Kurtosis 0.2248 Maximum 6897.0 Median 5038.0 Mean 5019.0 First Quartile 4708.0 Standard Deviation 507.1 Third Quartile 5355.0 Figure 1-6 is a frequency plot of the gamma scan count rate results showing the first and third quartile.

Figure 1-6 SU10218B First and Third Quartile 7000 6500 6000 5500 0.25 quantile cpm 5000 0.75 quantile 4500 4000 3500 3000 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 Frequency Figure 1-7 presents the gamma scan mean, 95% (1.96) and 99.7% (3) confidence levels for the measurements. The maximum gamma scan value reported for SU10218B was 6897 cpm. This value equates to a Cs-137 MDC of ~3.7 pCi/g based on the survey methodology and assumptions.

Gamma scans were conducted of the soil under randomly selected VBS barriers. The observed count rates ranged from 3,640 to 4390 cpm. No elevated count rates were encountered. The observed count rates relate to a Cs-137 MDC of 2.7 to 3.0 pCi/g.

13

Figure 1-7 SU10218B Gamma Scan Mean, 95 and 99.7% Confidence Levels SU10218B Gamma Scan Measurements 7000 3

6000 1.96 5000 mean cpm 4000 --1.96

-3 3000 2000 1000 0 300 600 900 1200 1500 1800 n

The gamma scan surveys for SU10218B did not detect any areas of elevated activity. One instrument alarm was observed and the location was resurveyed. No elevated count rates or alarms were encountered. The initial alarm was noted as a false positive.

Gamma Scans of SU10218B did not detect any regions of elevated activity. The results of the gamma scans did not exceed a MDC for Cs-137 greater than ~3.7 pCi/g.

Soil Sampling Survey unit 10218B comprises an area of 11,559 m2. A total of 30 surface and 30 subsurface soil samples were collected from this survey location. Surface samples consist of the first 15.0 cm of soil. Subsurface samples consist of samples collected over the next 15.0 to 100 cm of soil depth. If a systematic soil sample location occurred on the asphalt roadway the asphalt media was also analyzed and the surface soil sample was collected from the media located directly below the asphalt.

All samples were subjected to gamma spectroscopic analysis (HPGe). Ten percent of the samples were analyzed for the HTD radionuclides H-3, Fe-55, Ni-63 and Sr-90. These HTD radionuclides have been observed in the10CFR61 sampling of the Zion Station radiological waste streams.

With the exception of Cs-137 vendor analysis results for the submitted samples did not identify any plant-derived radionuclides. Of the 66 samples analyzed Cs-137 was positively identified in 25 of the samples.

The Cs-137 concentration ranged from 2.91-02 to 3.07-01 pCi/g. The mean Cs-137 concentration for the positive soil results reported is 7.90E-02 pCi/g. The mean Cs-137 concentration for all the soil samples was determined to be 5.24E-02 pCi/g.

14

Vendor soil results for SU10218B are provided in Attachment 1-5 for the following radionuclides: Ac-228, Am-241, Co-60, Cs-134, Cs-137, Eu-154, Eu-155, I-129, K-40, Pb-214, Tl-208 and U-235.

With the exception of the Cs-137 results for sample location L310218CSGSSSB003 (3.07E-01 +/-4.94E-02 pCi/g) the reported values are consistent with Cs-137 world-wide fallout concentrations for disturbed soils. Soil sample L310218CSGSSSB003 is a surface soil sample collected from the top 15 cm of soil.

The gamma spectroscopy results for this sample were examined and found to be valid. Gamma scans results did not identify any areas of elevated activity in the region from which the sample was collected.

The sample location reflects the regional flora and that the observed Cs-137 concentration is likely due to world-wide fallout in undisturbed soil. Additional samples were collected from this sample location.

Soil Sample Investigation Based on the soil sample results for surface soil sample location L310218CSGSSSB003 five additional samples were collected from the area associated with the sample location.. Each sample consisted of approximately 1.0 liter of soil (~1,300 g). One surface soil sample was collected from the same location as L310218CSGSSSB003 and one surface sample was collected at a two meter distance from the original sample point for each major compass point (North, South, East and West). The results are provided in Table 1-4.

Table 1-4 Sample Location L310218CSGSSSB003 Investigation Results Sample ID (Location) Cs-137 Activity (in pCi/g)

L310218IIGSSSB003 (Sample Origin) 0.178 +/-0.027 L310218IIGSSSB004 (2.0 m North) 0.225 +/- 0.030 L310218IIGSSSB005 (2.0 m South) 0.188 +/- 0.028 L310218IIGSSSSB006 (2.0 m East) 0.196 +/- 0.031 L310218IIGSSSSB007 (2.0 m West) 0.230 +/- 0.034 A second sample collected at the same location as L310218CSGSSSB003 resulted in value of 1.78E-01 pCi/g. The average of the five samples collected within two meters of the original sample location is 2.03E-01 pCi/g. These samples provide a better estimate of the Cs-137 activity at this location. The results are comparable to the activity that would be associated with world-wide fallout for undisturbed soils. To support the hypothesis that sample location L310218CSGSSSB003 was from undisturbed soil three additional samples were collected along the same southern heading but among the natural flora that exist along the wetland border. Reconnaissance of this region is indicative of undisturbed soils. The results are provided in Table 1-5. Samples L310218IIGSSSB008 through L310218IIGSSSB010 were collected from a region of approximately 3.5 by 3.5 m. The samples were collected from the top 15 cm of soil. The three samples that were collected for this investigation reflect fine dark sandy loam and organics which is consistent with undisturbed soils in the local sample area.

15

Table 1-5 Sample Results for Undisturbed Soil Region Sample ID Cs-137 Activity (Location) (in pCi/g)

L310218IIGSSSB008 0.291 +/- 0.030 L310218IIGSSSB009 0.394 +/- 0.036 L310218IIGSSSB010 0.283 +/- 0.031 The undisturbed soil sample Cs-137 concentration collected among the flora ranged from 0.283 to 0.394 pCi/g. The average Cs-137 concentration is 0.323 pCi/g and is consistent with sample location L310218CSGSSSB003 results (0.307 pCi/g). These latter soil sample results conclude that the Cs-137 concentration observed for sample location L310218CSGSSSB003 is due to world-wide fallout and not plant-derived activity.

Duplicate Samples Duplicate media samples from five sample locations were evaluated. Sample comparisons were performed for the following radionuclides: Ac-228, Cs-137, K-40, Pb-2124 and Tl-208. Radionuclides reported at MDC levels are not evaluated. The evaluation method is provided in Section 4.2.2 of the ZionSolutions Quality Assurance Project Plan (for Characterization and FSS). Duplicate samples were randomly selected. The evaluation results for SU10218B are provided in Attachment 1-6. All sample comparisons for the radionuclides subjected for duplicate sample evaluation passed the test criteria.

Hard-to-Detect Radionuclide Analysis As previously stated, ten percent of the media samples for SU10218B were submitted for hard-to-detect radionuclide analysis. HTD samples were randomly selected from the sample population with the exception of samples collected from areas requiring investigations. Vendor analysis was performed for H-3, Fe-55, Ni-63 and Sr-90. No HTD radionuclides were observed in the submitted samples. The results for these samples are presented in Attachment 1-7.

SU10218C Asphalt Roadway South of Switchyard (467.5 m2)

Survey Unit 10218C consists of the asphalt roadway immediately south of the Switchyard. This survey unit traverses east and west through the north end of SU10218A and SU10218B. The roadway is approximately 5.8 m wide and extends approximately 81 meters west from the southeast corner of the Switchyard fence. Figure 1-8 presents a map of the roadway and the beta direct measurement locations.

Gamma Scan Survey The gamma scan survey for the Asphalt Roadway was included as part of the gamma scan survey for SU10218A and SU10218B. The gamma surveys conducted over the Asphalt Roadway did not detect any areas of elevated activity.

Beta Scan Survey A beta scan survey was conducted over 23% of the survey unit. The survey was conducted using a Ludlum 2350-1 data logger connected to a 43-37 gas-flow proportional detector. The detector window is 16

0.438 m wide and three passes over the entire length (81 m) of the roadway were conducted along each edge and the central region of the roadway resulting in scan coverage of 106.4 m2 or 23% coverage.

Figure 1-8 SU10218C Asphalt Roadway Direct Measurement Sample Locations The beta scan survey did not detect any areas of elevated activity. Table 1-6 presents the results of the beta scan survey for each 10 meter survey increment. The beta survey was conducted using the latching mode of the 2350-1 instrument where the highest count rate for a given scan region is saved to memory until the latching mode is reset. Measurements were recorded approximately every 10 meters of travel resulting in 24 measurements being recorded. . The instrument scan speed was one detector width per second (13.34 cm/s). The total efficiency (t) used was 0.0983 (Tc-99). The source efficiency (0.25) is based on Table 2 of International Standard, ISO-7503-1. The detector window area was conservatively assumed to be 100 cm2 (true detector window area is 584 cm2) to account for any elevated region under 17

the detector window. For example the background MDC calculation for the 43-37 detector results in an MDC of 4.18E+03 dpm/100 cm2 (see Table 1-6). If the actual window area is used the MDC value is 5.84 times lower or 7.15E+02 dpm/100 cm2.

Table 1-6 SU10218C Beta Scan Measurements Ludlum Model 43-37 Parameters

Background:

738 cpm d :1.38 MDC:

4.18E+03 Average t: 0.0983 Scan Speed: 13.34 cm/s 2

dpm/100 cm2 Window Area: 584 cm Surveyor Efficiency: 0.5 Scan dpm/100 Gross cpm Net cpm Results Segment cm2*

1 8.54E+02 1.16E+02 1.18E+03 4.18E+03 2 8.41E+02 1.03E+02 1.05E+03 4.18E+03 3 8.25E+02 8.70E+01 8.87E+02 4.18E+03 4 8.79E+02 1.41E+02 1.44E+03 4.18E+03 5 9.12E+02 1.74E+02 1.77E+03 4.18E+03 6 9.93E+02 2.55E+02 2.60E+03 4.18E+03 7 1.01E+03 2.74E+02 2.79E+03 4.18E+03 8 1.12E+03 3.83E+02 3.90E+03 4.18E+03 9 1.07E+03 3.35E+02 3.41E+03 4.18E+03 10 1.04E+03 2.97E+02 3.03E+03 4.18E+03 11 9.56E+02 2.18E+02 2.22E+03 4.18E+03 12 9.92E+02 2.54E+02 2.59E+03 4.18E+03 13 9.75E+02 2.37E+02 2.42E+03 4.18E+03 14 9.13E+02 1.75E+02 1.78E+03 4.18E+03 15 9.59E+02 2.21E+02 2.25E+03 4.18E+03 16 1.02E+03 2.81E+02 2.86E+03 4.18E+03 17 1.04E+03 2.99E+02 3.05E+03 4.18E+03 18 1.06E+03 3.22E+02 3.28E+03 4.18E+03 19 9.41E+02 2.03E+02 2.07E+03 4.18E+03 20 8.78E+02 1.40E+02 1.43E+03 4.18E+03 21 9.74E+02 2.36E+02 2.41E+03 4.18E+03 22 1.06E+03 3.20E+02 3.26E+03 4.18E+03 23 1.10E+03 3.63E+02 3.70E+03 4.18E+03 24 1.01E+03 2.76E+02 2.81E+03 4.18E+03

• Conservatively assumes 100 cm2 area for 43-37 (584.cm2) detector. If the observed activity is uniformly distributed then the above reported results are 5.84 times lower.

The surveyor efficiency is not used to determine the results.

The result for the beta scan is 4.18E+03 dpm/100 cm2 and assumes a detector area of 100 cm2.

Adjusting for the actual detector window size results in a value of 7.16 E+02 dpm/100 cm2.

The alarm set point for the beta scans was set at the background MDCR plus the background (738 + 290 cpm) or 1030 cpm. No alarms were encountered during the scan survey. During the scan the surveyors also listened for increases in the instrument count rate and slowed or stopped the scan survey if an increase in count rate was detected. The beta scan survey did not detect any areas of elevated activity.

18

Direct Beta Measurements A total of 20 direct beta surface measurements were acquired at systematic locations over the asphalt roadway. Figure 1-8 depicts the location of each of the direct measurements. The measurements were acquired using a Ludlum Model 2350-1 instrument and Model 43-68 gas-flow proportional detector. The MDC was determined using the following formula:

Where, RB = background in cpm [262 cpm] (The background was determined by averaging ten direct Measurements acquired from the concrete background reference area located in the park.)

ts = sample count time (in minutes) [1.0 minute]

tb = background count time (in minutes) [10 minutes]

t = total efficiency [0.1138]

A = detector active window area (in cm2) [126 cm2]

And, Table 1-7 SU310218C Asphalt Roadway Direct Measurements Location Code Gross cpm Net cpm dpm/100 cm2 Results (dpm/100 cm2)

L310218CSPATBC001 2.36E+02 -2.60E+01 MDC 4.08E+02 L310218CSPATBC002 2.52E+02 -1.00E+01 MDC 4.08E+02 L310218CSPATBC003 2.79E+02 8.60E+01 1.19E+02 1.19E+02 L310218CSPATBC004 2.55E+02 -7.00E+00 MDC 4.08E+02 L310218CSPATBC005 2.52E+02 -1.00E+01 MDC 4.08E+02 L310218CSPATBC006 2.40E+02 -1.20E+01 MDC 4.08E+02 L310218CSPATBC007 2.65E+02 3.00E+00 2.09E+01 4.08E+02 L310218CSPATBC008 2.65E+02 3.00E+00 2.09E+01 4.08E+02 L310218CSPATBC009 2.77E+02 1.50E+01 1.05E+02 4.08E+02 L310218CSPATBC010 2.66E+02 4.00E+00 2.79E+01 4.08E+02 L310218CSPATBC011 2.54E+02 -8.00E+00 MDC 4.08E+02 L310218CSPATBC012 2.34E+02 -2.80E+01 MDC 4.08E+02 L310218CSPATBC013 2.65E+02 3.00E+00 2.09E+01 4.08E+02 L310218CSPATBC014 2.71E+02 9.00E+00 6.28+01 4.08E+02 L310218CSPATBC015 2.61E+02 -1.00E+00 MDC 4.08E+02 L310218CDPATBC015 3.01E+02 1.08E+02 2.72E+02 4.08E+02 L310218CSPATBC016 2.72E+02 1.00E+01 6.97E+01 4.08E+02 L310218CSPATBC017 2.71E+02 9.00E+00 6.28E+01 4.08E+02 L310218CSPATBC018 2.79E+02 1.70E+01 1.19E+02 4.08E+02 L310218CSPATBC019 2.60E+02 -2.00+00 MDC 4.08E+02 L310218CSPATBC020 2.39E+02 -2.30E+01 MDC 4.08E+02 19

All direct beta measurements were less than or equal to the MDC of 4.08E+02 dpm/100 cm2.

Generic gross betas DCGLs for surfaces were derived using the 10CFR61 radionuclide results associated with the Zion Station DAW mixture. The NRC screening level DCGL values were obtained from NUREG-5512 Volume 3 Table 5.19 and are consistent with those found in NUREG-1757 Volume 1, Appendix H-1. There are three separate DAW results for Zion Station represents Unit 1, Unit 2 and the Auxiliary Building. The nuclide fraction Co-60 varies significantly between these structures resulting in wide variations in the DCGL for each area. The most conservative gross beta DCGL was 7.30E+03 dpm/100 cm2 and reflects the Co-60 nuclide fraction dominance (87-92% of the mixture) observed for Unit 2 and the Auxiliary Building. This gross beta DCGL derived from the most conservative DAW waste stream is used to examine the direct beta measurements from SU10218C (Asphalt Roadway). The MDC observed for the gross beta measurement from SU10218C is 5.6% of the generic DCGL. It should be noted that the background for the direct beta measurements was determined from measurements acquired from the Park area and represents unaffected media.

Direct Beta Measurement Duplicate Sample A duplicate direct beta measurement was acquired for sample location L310218CSPATBC015 (L310218CDPATBC015). The duplicate sample measurement was randomly selected. The duplicate sample measurement evaluation method is provided in Section 4.2.2 of the ZionSolutions Quality Assurance Project Plan (for Characterization and FSS). The evaluation results for the samples are provided in Table 1-8. The sample comparison for the direct measurement subjected for duplicate sample evaluation passed the test criteria.

Table 1-8 Duplicate Sample Comparison Location Code Gross cpm Net cpm dpm/100 cm2 L310218CSPATBC015 2.61E+02 -1.00E+00 4..08E+02 L310218CDPATBC015 30.1E+02 3.90E+01 2.72E+02 Sigma: 1.97E+02 Resolution: <4.0 Acceptance Ratio: 0.4-2.5 Calculated Acceptance Value: 1.50 Result: Passed MDC is 4.08E+02 dpm/100 cm2 Asphalt and Soil Sampling A total of 18 asphalt and soil samples were acquired from SU10218C. The samples represented six random locations. The samples consisted of the asphalt, the media directly beneath the asphalt (surface soil) and the subsurface soil (15 to 100 centimeters beneath the soil surface). Vendor gamma spectroscopy results for SU10218C are provided in Attachment 1-8 for the following radionuclides: Ac-228, Am-241, Co-60, Cs-134, Cs-137, Eu-154, Eu-155, I-129, K-40, Pb-214, Tl-208 and U-235.

With the exception of Cs-137 the vendor sample analysis did not detect any plant derived radionuclides.

Of the 18 samples analyzed Cs-137 was positively identified in 3 samples. The maximum observed positive Cs-137 activity was 3.16E-02 pCi/g. The positive Cs-137 activity ranged from 9.86E-03 to 20

3.16E-2 pCi/g. The mean Cs-137 concentration for the positive soil results reported is 2.12E-02 pCi/g.

The mean Cs-137 concentration for all the soil samples was determined to be 2.43E-02 pCi/g.

SU10218D Mix Plant Concrete Pad (131.1 m2)

Figure 1-9 SU10218D Mix Plant Pad Concrete Core and Direct Measurement Locations Core D002 Core D001 21

Survey Unit 10218D is the Mix Plant concrete pad. This concrete pad is located about 60 meters south of the Switchyard fence. The pad is located on the east and west boundary of SUs 10218A and 10218B Gamma Scan Survey The gamma scan survey for the Mix Plant concrete pad was included as part of the gamma scan survey for SU10218A and SU10218B. The gamma surveys conducted over the Mix Plant pad did not detect any areas of elevated activity.

Beta Scan Survey A beta scan survey was conducted over 22.3% of the survey unit. The survey was conducted using a Ludlum 2350-1 data logger connected to a 43-37 gas-flow proportional detector. The detector window is 0.438 m wide and three passes over the longest length of each joined section of the pad resulted in scan coverage of 29.24 m2 or 22.3 percent coverage.

Table 1-9 presents the results of the beta scan survey for each 10 meter survey increment. The beta survey was conducted using the latching mode of the 2350-1 instrument where the highest count rate for a given scan region is saved to memory until the latching mode is reset. Measurements were recorded approximately every 10 meters of travel resulting in 20 measurements being recorded. The instrument scan speed was one detector width per second (13.34 cm/s). The total efficiency (t) used was 0.0983 (Tc-99). The source efficiency (0.25) is based on Table 2 of International Standard, ISO-7503-1. The detector window area was conservatively assumed to be 100 cm2 (true detector window area is 584 cm2) to account for any elevated region under the detector window. For example, the background MDC calculation for the 43-37 detector results in an MDC of 4.38E+03 dpm/100 cm2 (see Table 1-9). If the actual window area is used the MDC value is 5.84 times lower or 7.50E+02 dpm/100 cm2. The maximum result for the beta scan is 4.384E+03 dpm/100 cm2 and assumes a detector area of 100 cm2.

The alarm set point for the beta scans was set at the background MDCR plus the background (811 + 304 cpm) or 1115 cpm. Where:

No alarms were encountered during the scan survey. During the scan the surveyors also listened for increases in the instrument count rate and slowed or stopped the scan survey if an increase in count rate was detected. The beta scan survey did not detect any areas of elevated activity.

22

Table 1-9 SU10218D Beta Scan Measurements Ludlum Model 43-37 Parameters

Background:

811 cpm d :1.38 MDC =

4.38E+03 Average t: 0.0983 Scan Speed: 13.34 cm/s 2

dpm/100 cm2 Window Area: 584 cm Surveyor Efficiency: 0.5 Scan Gross cpm Net cpm dpm/100 cm2* Results Segment 1 1.16+03 3.49E+02 3.55E+03 4.38E+03 2 1.14E+03 3.29E+02 3.35E+03 4.38E+03 3 1.18E+03 3.69E+01 3.75E+03 4.38E+03 4 1.20E+03 3.89E+02 3.96E+03 4.38E+03 5 1.15E+03 3.39E+02 3.45E+03 4.38E+03 6 1.19E+03 3.79E+02 3.86E+03 4.38E+03 7 1.13E+03 3.19E+02 3.25E+03 4.38E+03 8 1.09E+03 2.79E+02 3.84E+03 4.38E+03 9 1.14E+03 3.29E+02 3.35E+03 4.38E+03 10 1.21E+03 3.99E+02 4.06E+03 4.38E+03 11 1.18E+03 3.69E+02 3.75E+03 4.38E+03 12 1.19E+03 3.79E+02 3.86E+03 4.38E+03 13 1.19E+03 3.79E+02 3.86E+03 4.38E+03 14 9.90E+02 1.79E+02 2.00E+03 4.38E+03 15 1.08E+03 2.69E+02 2.74E+03 4.38E+03 16 1.06E+03 2.49E+02 2.53E+03 4.38E+03 17 1.07E+03 2.59E+02 2.64E+03 4.38E+03 18 1.11E+03 2.99E+02 3.04E+03 4.38E+03 19 1.13E+03 3.19E+02 3.25E+03 4.38E+03 20 1.20E+03 3.89E+02 3.96E+03 4.38E+03

• Surveyor efficiency is not used in the calculation of the results. Conservatively assumes 100 cm2 area for 43-37 (584.cm2) detector. If the observed activity is uniformly distributed then the above reported results are 5.84 times lower.

Direct Beta Measurements A total of 20 direct beta surface measurements were acquired at systematic locations over the mix plant concrete pad. Figure 1-9 depicts the location of each of the direct measurements. Table 1-10 presents the direct beta measurement results. The measurements were acquired using a Ludlum Model 2350-1 instrument and Model 43-68 gas-flow proportional detector. The MDC was determined using the following formula:

Where, RB = background in cpm [263 cpm]

ts = sample count time (in minutes) [1.0 minute]

tb = background count time (in minutes) [10 minutes]

t = total efficiency [0.1138]

A = detector active window area (in cm2) [126 cm2]

23

And, Table 1-10 SU310218D Mix Plant Concrete Pad Direct Measurements Location Code Gross cpm Net cpm dpm/100 cm2 Results (dpm/100 cm2)

L310218CSFCTBD001 3.02E+02 3.90E+01 2.72E+02 4.09E+02 L310218CSFCTBD002 3.29E+02 6.60E+01 4.60E+02 4.60E+02 L310218CSFCTBD003 3.13E+02 5.00E+01 3.49E+02 4.09E+02 L310218CSFCTBD004 2.88E+02 2.50E+01 1.74E+02 4.09E+02 L310218CSFCTBD005 3.06E+02 4.30E+01 3.00E+02 4.09E+02 L310218CSFCTBD006 2.94E+02 3.10E+01 2.16E+02 4.09E+02 L310218CSFCTBD007 2.92E+02 2.90E+01 2.02E+02 4.09E+02 L310218CSFCTBD008 2.69E+02 6.00E+00 4.18E+01 4.09E+02 L310218CSFCTBD009 2.91E+02 2.80E+01 1.95E+02 4.09E+02 L310218CSFCTBD010 3.18E+02 5.50E+01 3.84E+02 4.09E+02 L310218CSFCTBD011 3.06E+02 4.30E+01 3.00E+02 4.09E+02 L310218CSFCTBD012 3.42E+02 7.90E+01 5.51E+02 5.51E+02 L310218CSFCTBD013 2.92E+02 2.90E+01 2.02E+02 4.09E+02 L310218CSFCTBD014 2.84E+02 2.10E+01 1.47E+02 4.09E+02 L310218CSFCTBD015 3.31E+02 6.80E+01 4.74E+02 4.74E+02 L310218CSFCTBD016 3.25E+02 6.20E+02 4.32E+02 4.32E+02 L310218CSFCTBD017 2.94E+02 3.10E+01 2.16E+02 4.09E+02 L310218CDFCTBD017 3.50E+02 8.70E+01 6.07E+02 6.07E+02 L310218CSFCTBD018 3.21E+02 5.80E+01 405E+02 4.09E+02 L310218CSFCTBD019 2.93E+02 3.00E+01 2.09E+02 4.09E+02 L310218CSFCTBD020 3.00E+02 3.70E+01 2.58E+02 4.09E+02 Positive Direct beta measurements ranged from 4.09E+02 to 6.07E+02 dpm/100 cm2. The mean concentration for positive measurement results was 5.05E+02 dpm/100 cm2. The mean concentration for all the measurements was 4.32E+02 dpm/100 cm2.

Generic gross betas DCGLs for surfaces were derived using the 10CFR61 radionuclide results associated with the Zion Station DAW mixture. The NRC screening level DCGL values were obtained from NUREG-5512 Volume 3 Table 5.19 and are consistent with those found in NUREG-1757 Volume 1, Appendix H-1. There are three separate DAW results for Zion Station represents Unit 1, Unit 2 and the Auxiliary Building. The nuclide fraction Co-60 varies significantly between these structures resulting in wide variations in the DCGL for each area. The most conservative gross beta DCGL was 7.30E+03 dpm/100 cm2 and reflects the C0-60 nuclide fraction dominance (87-92% of the normalize3d mixture) observed for Unit 2 and the Auxiliary Building. This gross beta DCGL derived from the most conservative DAW waste stream is used to examine the direct beta measurements from SU10218C (Asphalt Roadway). The average gross beta measurement from SU10218D is 6.9% of the generic DCGL.

The maximum observed gross beta measurement from SU10218D is 8.3% of the generic DCGL.

24

Direct Beta Measurement Duplicate Sample A duplicate direct beta measurement was acquired for sample location L310218CDFCTBD017 (L310218CDFCTBD017). The duplicate sample was randomly selected. The duplicate sample evaluation method is provided in Section 4.2.2 of the ZionSolutions Quality Assurance Project Plan (for Characterization and FSS). . The evaluation results for the samples are provided in Table 1-11. The sample comparison for the direct measurement subjected for duplicate sample evaluation passed the test criteria.

Table 1-11 SU10218D Duplicate Sample Comparison Location Code Gross cpm Net cpm dpm/100 cm2 L310218CSFCTBD017 2.94E+02 3.10E+01 4.09E+02 L310218CDFCTBD017 3.50E+02 8.70E+01 6.07E+02 Sigma: 1.39E+02 Resolution: <4.0 Acceptance Ratio: 0.4-2.5 Calculated Acceptance Value: 0.67 Result: Passed Concrete Core Sampling Two concrete core samples were acquired from SU10218D (see figure 1-9). The cores consisted of concrete from the pad surface to a depth of 15 cm. Vendor gamma spectroscopy results for SU10218D are provided in Attachment 1-9 for the following radionuclides: Ac-228, Am-241, Co-60, Cs-134, Cs-137, Eu-154, Eu-155, I-129, K-40, Pb-214, Tl-208 and U-235. No plant-derived activity was observed. The maximum Cs-137 results for the concrete cores were 3.92E-02 pCi/g.

SU10218E Hazardous Waste Storage Building Concrete Pad (105.4 m2)

SU10218E is the Hazardous Waste Storage Building Concrete pad. This 8.2 by 12.8 m is located about 18.3 meters west and 7.6 m south of the southwest corner of the Switchyard fence.

Gamma Scan Survey The gamma scan survey for the Hazardous Waste Storage Building pad resulted in a gamma scan coverage of 20.0 percent. The gamma surveys conducted over the concrete pad did not detect any areas of elevated activity.

Table 1-12 presents the results of the gamma scan survey for each 10 meter survey increment and notes the Cs-137 surrogate MDC for each scan segment. The gamma scan survey was conducted using the latching mode of the 2350-1 instrument where the highest count rate for a given scan region is saved to memory until the latching mode is reset. Measurements were recorded approximately every 10 meters of travel resulting in 6 measurements being recorded. The instrument scan speed was 0.25 m/s (~10 inches/s) with the detector 7.62 cm (3.0 inches) from the surface. The general area background was 4.40E+03 cpm. Based on the scan speed, distance of the detector from the concrete surface and surveyor efficiency the alarm set point is equivalent ~3.4 pCi/g using the same Cs-137 and Co-60 mixture as noted for SU10218A and SU10218B. During the scan the surveyors also listened for increases in the 25

instrument count rate and slowed or stopped the scan survey if an increase in count rate was detected.

The gamma scan survey did not detect any areas of elevated activity.

Table 1-12 SU10218E Gamma Scan Results MDC Equivalent Location Gross cpm (pCi/g) 1 4.94E+03 3.15 2 5.25E+03 3.20 3 4.95E+03 3.15 4 4.79E+03 3.08 5 5.09E+03 3.15 6 5.25E+03 3.20 Beta Scan Survey A beta scan survey was conducted over 34.8% of the survey unit. The survey was conducted using a Ludlum 2350-1 data logger connected to a 43-68 gas-flow proportional detector. The 43-68 detector window has a active width of 0.1432 m and twenty passes were conducted over the length of the pad at a rate of one active window width per second (8.8 cm/s) resulted in a scan coverage of 36.6 m2 or 34.8 percent coverage.

Table 1-13 presents the results of the beta scan survey for each 12.8 meter pad length. The beta survey was conducted using the latching mode of the 2350-1 instrument where the highest count rate for a given scan region is saved to memory until the latching mode is reset. Measurements were recorded approximately every 12.8 meters of travel resulting in 20 measurements being recorded. The detector window area for the Model 43-68 is 126 cm2. The instrument scan speed was one detector width per second (8.8 cm/s). The total efficiency (t) used was 0.114 (Tc-99). The source efficiency (0.25) is based on Table 2 of International Standard, ISO-7503-1. The maximum positive result for the beta scan is 1.95+03 dpm/100 cm2.

The alarm set point for the beta scans was set at the background MDCR plus the background (263 +173 cpm) or 436 cpm. One alarm was encountered and upon subsequent surveys the activity decreased significantly indicating the presence of Ra-Th daughters (Initial cpm: 514; Final cpm: 403). The residual activity equated to a scan value that was less than the alarm set point. During the scan the surveyors also listened for increases in the instrument count rate and slowed or stopped the scan survey if an increase in count rate was detected. The beta scan survey did not detect any areas of elevated activity.

26

Table 1-13 SU10218E Beta Scan Measurements

Background:

263 cpm d :1.38 MDC:

Average t: 0.114 Scan Speed: 8.8 cm/s 1.71E+03 Window Area: 126 cm2 Surveyor Efficiency: 0.5 dpm/100 cm2 Scan Gross cpm Net cpm dpm/100 cm2 Results Segment 1 341 78 7.69E+02 1.71E+03 2 337 74 7.30E+02 1.71E+03 3 337 74 7.30E+02 1.71E+03 4 357 94 9.27E+02 1.71E+03 5 407 144 1.42E+03 1.71E+03 6 426 163 1.61E+03 1.71E+03 7 388 125 1.23E+03 1.71E+03 8 395 132 1.30E+03 1.71E+03 9 402 139 1.37E+03 1.71E+03 10 461 198 1.95E+03 1.95E+03 11 390 127 1.25E+03 1.71E+03 12 406 143 1.41E+03 1.71E+03 13 380 117 1.15E+03 1.71E+03 14 398 135 1.33E+03 1.71E+03 15 362 99 9.76E+02 1.71E+03 16 408 145 1.43E+03 1.71E+03 17 401 138 1.36E+03 1.71E+03 18 382 119 1.17E+03 1.71E+03 19 405 142 1.40E+03 1.71E+03 20 378 115 1.13E+03 1.71E+03 Direct Beta Measurements A total of 20 direct beta surface measurements were acquired at systematic locations over the Hazardous Waste Storage Building pad. Figure 1-10 depicts the location of each of the direct measurements. Table 1-14 presents the direct beta measurement results. The measurements were acquired using a Ludlum Model 2350-1 instrument and Model 43-68 gas-flow proportional detector. The MDC was determined using the following formula:

Where, RB = background in cpm [281 cpm]

ts = sample count time (in minutes) [1.0 minute]

tb = background count time (in minutes) [10 minutes]

t = total efficiency [0.1138]

A = detector active window area (in cm2) [126 cm2]

27

And, Table 1-14 SU310218E Hazardous Waste Storage Pad Direct Measurements Location Code Gross cpm Net cpm dpm/100 cm2 Results (dpm/100 cm2)

L310218CSFCTBE001 3.99E+02 1.18E+02 8.23E+02 8.23E+02 L310218CSFCTBE002 3.91E+02 1.10E+02 7.67E+02 7.67E+02 L310218CSFCTBE003 4.13E+02 1.32E+02 9.21E+02 9.21E+02 L310218CSFCTBE004 4.26E+02 1.45E+02 1.01E+03 1.01E+03 L310218CSFCTBE005 3.92E+02 1.11E+02 7.74E+02 7.74E+02 L310218CSFCTBE006 4.27E+02 1.46E+02 1.02E+03 1.02E+03 L310218CSFCTBE007 3.64E+02 8.30E+01 5.79E+02 5.79E+02 L310218CSFCTBE008 3.54E+02 7.30E+02 5.09E+02 5.09E+02 L310218CSFCTBE009 3.75E+02 9.40E+01 6.56E+02 6.56E+02 L310218CSFCTBE010 3.92E+02 1.11E+02 7.74E+02 7.74E+02 L310218CSFCTBE011 3.01E+02 2.00E+01 1.40E+02 4.22E+02 L310218CSFCTBE012 3.74E+02 9.30E+01 6.49E+02 6.49E+02 L310218CSFCTBE013 4.08E+02 1.27E+02 8.86E+02 8.86E+02 L310218CSFCTBE014 3.82E+02 1.01E+02 7.04E+02 7.04E+02 L310218CDFCTBE014 3.38E+02 5.70E+01 3.98E+02 3.98E+02 L310218CSFCTBE015 4.03E+02 1.22E+02 8.51E+02 8.51E+02 L310218CSFCTB\E016 3.68E+02 8.70E+02 6.07E+02 6.07E+02 L310218CSFCTBE017 4.23E+02 1.42E+02 9.90E+02 9.90E+02 L310218CSFCTBE018 4.26E+02 1.45E+02 1.01E+03 1.01E+03 L310218CSFCTBE019 3.80E+02 9.90E+01 6.90E+02 6.90E+02 L310218CSFCTBE020 3.52E+02 7.1E+01 4.95E+02 4.95E+02 Direct beta measurements ranged from <4.22E+02 to 1.01E+03 dpm/100 cm2. The mean concentration was 7.41E+02 dpm/100 cm2.

Generic gross betas DCGLs for surfaces were derived using the 10CFR61 radionuclide results associated with the Zion Station DAW mixture. The NRC screening level DCGL values were obtained from NUREG-5512 Volume 3 Table 5.19 and are consistent with those found in NUREG-1757 Volume 1, Appendix H-1. There are three separate DAW results for Zion Station represents Unit 1, Unit 2 and the Auxiliary Building. The nuclide fraction Co-60 varies significantly between these structures resulting in wide variations in the DCGL for each area. The most conservative gross beta DCGL was 7.30E+03 dpm/100 cm2 and reflects the C0-60 nuclide fraction dominance (87-92% of the normalized mixture) observed for Unit 2 and the Auxiliary Building. This gross beta DCGL derived from the most conservative DAW waste stream is used to examine the direct beta measurements from SU10218C (Asphalt Roadway). The average gross beta measurement from SU10218E is 10.2% of the generic DCGL. The maximum observed gross beta measurement from SU10218E is 14.0% of the generic DCGL.

28

Figure 1-10 SU10218E Hazardous Waste Storage Pad (27 X 42)

Direct Measurement Locations 29

Direct Beta Measurement Duplicate Sample A duplicate direct beta measurement was acquired for sample location L310218CDFCTBE014 (L310218CDFCTBE014). The duplicate sample was randomly selected. The duplicate sample evaluation method is provided in Section 4.2.2 of the ZionSolutions Quality Assurance Project Plan (for Characterization and FSS). The evaluation results for the samples are provided in Table 1-15. The sample comparison for the direct measurement subjected for duplicate sample evaluation passed the test criteria.

Table 1-15 Duplicate Sample Comparison Location Code Gross cpm Net cpm dpm/100 cm2 L310218CSFCTBE014 3.82E+02 1.01E+02 7.04E+02 L310218CDFCTBE014 3.38E+02 5.70E+01 3.98E+02 Sigma: 2.76E+02 Resolution: <4.0 Acceptance Ratio: 0.4-2.5 Calculated Acceptance Value: 1.77 Result: Passed Concrete Core Sampling Three concrete core samples were acquired from SU10218E. The cores consisted of concrete from the pad surface to a depth of 15 cm. The cores had been collected during earlier MARSAME survey operations conducted in the area. Vendor gamma spectroscopy results for SU10218E Concrete cores are provided in Attachment 1-10 for the following radionuclides: Ac-228, Am-241, Co-60, Cs-134, Cs-137, Eu-154, Eu-155, I-129, K-40, Pb-214, Tl-208 and U-235. No plant-derived activity was observed. The maximum Cs-137 result for the concrete cores was 6.18-02 pCi/g. Duplicate samples were not collected for these cores.

Summary The survey design for the ISFSI construction area focused primarily on the surface and subsurface soil associated within the region. The characterization survey was designed to meet the general requirements of a final status survey in accordance with NUREG-1575 Rev. 1, the Multi-Agency Radiation Survey and Site Investigation Manual (MARSSIM). Because spent fuel will be stored on the ISFSI and following its removal in the far future MARSSIM or similar type surveys will be required to release the ISFSI site.

The surveys provided in this report provide strong evidence that no residual plant-derive radioactivity is present in the ISFSI area. Further, if the NRC screening values for surfaces and soil published in NUREG-1757 V2 R1 Appendix H Tables H-1 and H-2 are used to evaluate the survey results the ISFSI region would readily meet that release criteria. It should be noted that the screening values found in NUREG-1757V2R1 are conservative relative to the expected DCGLs that will be developed for unrestricted release and license termination of the Zion Nuclear Power Station.

30

References USNRC, NUREG-1575, Multi-Agency Radiation Survey and Site Investigation Manual (MARSSIM)

Rev 1, 2000.

USNRC, NUREG-1757, Consolidated Decommissioning Guidance, Characterization, Surveys and Determination of Radiological Criteria Vol. 2 Rev. 1, September 2006.

Eberline Analytical Laboratory, Oak Ridge, TN. Report of Analysis WO 11-12022 Feb 2012 Eberline Analytical Laboratory, Oak Ridge, TN. Report of Analysis WO 11-12025 Feb 2012 Eberline Analytical Laboratory, Oak Ridge, TN. Report of Analysis WO 11-12051 Feb 2012 Eberline Analytical Laboratory, Oak Ridge, TN. Report of Analysis WO 11-12063 Feb 2012 Eberline Analytical Laboratory, Oak Ridge, TN. Report of Analysis WO 11-12071 Feb 2012 Eberline Analytical Laboratory, Oak Ridge, TN. Report of Analysis WO 11-12076 Feb 2012 Eberline Analytical Laboratory, Oak Ridge, TN. Report of Analysis WO 11-12080 Feb 2012 Eberline Analytical Laboratory, Oak Ridge, TN. Report of Analysis WO 11-12083 Feb 2012 Eberline Analytical Laboratory, Oak Ridge, TN. Report of Analysis WO 11-12085 Feb 2012 TSD-004, Ludlum Model 44-10 Detector Sensitivity, Revision 0, ZionSolutions, EH&S Technical Basis Document, 1/30/12 31

Attachment 1-1 CHARACTERIZATION SURVEY PLAN FOR THE ZION STATION INDEPENDENT SITE FUEL STORAGE FACILITY (ISFSI) 1

CHARACTERIZATION SURVEY PLAN FOR THE ZION STATION INDEPENDENT SITE FUEL STORAGE FACILITY (ISFSI)

November 2, 2011 Prepared By: _________________________________________ Date: _______________

Bob Decker Reviewed By: _________________________________________ Date: ________________

Doug Schult, CHP Approved By: _________________________________________ Date: ________________

Steve Horvath 2

Table of Contents 1.0 Introduction ...................................................................................................................................... 1 2.0 Scope ................................................................................................................................................. 1 3.0 Organization...................................................................................................................................... 4 4.0 Data Quality Objective.................................................................................................................... 4 4.1 Problem Description........................................................................................................... 4 4.2 Decision Identification ......... 5 4.3 Inputs to Decision ............................................................................................................... 5 4.4 Boundary of the Study ....................................................................................................... 5 4.5 Decision Rule....................................................................................................................... 5 4.6 Limit of Decision Error ...................................................................................................... 6 4.7 Design for Data Collection ................................................................................................. 6 5.0 Radionuclides of Concern ............................................................................................................... 7 6.0 Survey Area...................................................................................................................................... 7 7.0 Survey Design and Methodology .................................................................................................... 8 7.1 Land Surveys ...................................................................................................................... 9 7.2 Structure, Asphalt and Other Media Surveys ............................................................... 10 7.3 Survey Packages .............................................................................................................. 11 8.0 Sampling Methodology ................................................................................................................. 11 8.1 Surface Soil Samples ........................................................................................................ 13 8.2 Subsurface Soil Samples .................................................................................................. 14 9.0 Instrumentation ............................................................................................................................. 15 10.0 Sample Handling and Analysis ....................................................................................................... 16 11.0 Minimum Detectable Concentrations .......................................................................................... 16 11.1 Surface MDC .................................................................................................................... 17 11.2 Action Level for Surfaces................................................................................................. 17 11.4 Direct Measurement MDC................................................................................................. 17 11.5 Gamma Scan MDC................................................................................................................ 18 12.0 Quality Assurance and Quality Control ...................................................................................... 18 12.1 Plans and Procedures ....................................................................................................... 19 12.2 Training ............................................................................................................................. 19 12.3 Instrument Selection, Calibration and Operation ......................................................... 19 12.4 Duplicate Samples ............................................................................................................ 19 12.5 Chain of Custody .............................................................................................................. 20 12.6 Duplicate Review of Survey Results ............................................................................... 20 3

13.0 Characterization Survey Data ...................................................................................................... 20 14.0 Attachments ................................................................................................................................... 21 15.0 References ...................................................................................................................................... 22 4

1.0 Introduction The Zion Nuclear Station is located in the city of Zion, in northeast Illinois, on the western shore of Lake Michigan. The station consisted of 2 pressurized water reactors supplied by Westinghouse. On January 15, 1998 it was announced that the Zion Nuclear Station had been permanently shut down. On March 9, 1998 certification was provided to the Nuclear Regulatory Commission, NRC, that all fuel assemblies had been permanently removed from the reactor vessels and transferred to the spent fuel pool. As a result the 10CFR50 license for the Zion Station was amended to no longer authorize reactor operation or the placement of fuel within the reactor vessels. The Zion Station was placed in a SAFESTOR condition while waiting decommissioning. On January 1, 2010 the Zion Station license was transferred to ZionSolutions LLC a subsidiary of EnergySolutions LLC in order proceed with decommissioning activities and ultimate license termination.

As part of the Zion Station Remediation Project (ZSRP) all reactor fuel and greater than Class C waste will be loaded into casks and transferred to an Independent Spent Fuel Storage Installation, ISFSI, to be constructed at the Zion Station. It is expected that the fuel will remain in dry storage within the ISFSI until it is transferred to the Department of Energy (DOE). The ISFSI will be constructed in the southwest corner of the Zion Nuclear Station, immediately south of the switchyard. Figure 1-1 presents the approximate location.

In order to determine the radiological status of the area to be impacted by the construction of the ISFSI this characterization survey plan will be implemented and the results documented. The characterization survey will focus primarily on surface and subsurface soils. It is intended that the characterization survey be designed to meet the general requirements of a final status survey designed in accordance with the guidance contained in the MARSSIM as the area will be unavailable for this type of survey once the ISFSI is constructed.

2.0 Scope Figure 1-1 shows the approximate location of the ISFSI. Surrounding the ISFSI will be a Vehicle Barrier System, (VBS), which will consist of soil approximately 4 feet high and 5 feet wide.

Surrounding the VBS will be a buffer zone approximately 20 feet wide. The scope of this characterization will include the area within the buffer zone. Where possible, the boundaries of the area to be characterized will be defined by site features such as the Switchyard fence to the north and the restricted area fence to the west. The boundaries of the area to be characterized were surveyed with a global positioning satellite (GPS) device. The resulting coordinates were then used to prepare Figure 2-1.

Currently there are two concrete pads in the area to be characterized, along with two portable buildings, numerous concrete structures/blocks, miscellaneous materials and equipment, and several piles of debris. Prior to initiating the characterization survey these items will be removed.

The Portable buildings are intended to be removed from the area for later disposition following MARSAME surveys.

Figure 1-1 ISFSI Survey Locations Current plans call for the asphalt road/driveway immediately south of the Switchyard fence, to remain following the completion of decommissioning activities.

The west end and southwest corner of the area to be characterized is heavily vegetated. All vegetation and trees less than 6 inches in diameter will also be removed prior to initiating the characterization survey.

Within the area to be characterized the survey will focus on both surface (0 to 15 cm) and subsurface (15 to 100 cm) soils. The survey will consist of gamma scans and the collection of soil samples for analysis. The initial soil sampling locations will be defined based on a systematic design to ensure an unbiased and uniform survey. Biased sampling locations may be identified 6

based on the gamma scanning results or based on the intuition of those conducting the characterization survey. Investigatory sampling may be required based on the initial sampling results.

Figure 2-1 ISFSI Systematic Soil Sample Locations 7

3.0 Organization The characterization of the area to be impacted by the ISFSI will be performed under the direction of the Zion Solution Characterization/License Termination Manager. Radiological Engineers/Health Physicists reporting to the Characterization/License Termination Manager have prepared this plan, will oversee the implementation of the plan, and prepare a final report documenting the results of the characterization survey. Radiation Protection Technicians reporting to the Characterization/License Termination Manager may assist in the implementation of the characterization survey.

A Radiological Engineer/Supervisor from EnergySolutions Commercial Services Group will implement the Characterization Survey Plan. The Radiation Protection Technician support, instrumentation, and procedures required to implement the plan will be provided by the Commercial Services Group. The Commercial Services Group will also be responsible for managing contracts with the vendors used to support this characterization effort.

It is anticipated that two vendors will be required to support this characterization effort. One vendor will be responsible for providing onsite support for coring and direct push activities associated with sample collection. The other vendor will be responsible for the offsite analyses of collected samples.

4.0 Data Quality Objectives The objective of this characterization survey is to perform a radiological characterization of the area to be impacted by the construction of the ISFSI. Once the ISFSI is constructed and the fuel and greater than Class C waste transferred to the ISFSI it will not be possible to perform this type of survey. It is intended that this survey will meet the minimum requirements of a final status survey designed in accordance with the guidance contained in MARSSIM.

4.1 Problem Description Due to the operation of the Zion Station there is a potential for plant-derived activity in the area, primarily fission and activation products resulting from site operations. Prior to the construction of the ISFSI at the Zion Station there is a need to determine and document the radiological status of the area that will be impacted by the construction. It is intended that the characterization surveys to be performed will meet the minimum requirements of a final status survey designed in accordance with the guidance in the MARSSIM as the area will be unavailable for a final status survey once the ISFSI is constructed.

If radiological contamination should be identified in the area to be impacted by the construction of the ISFSI, radionuclide specific analyses will be used to identify the radionuclides present, the activity concentration of each radionuclide present, and the relative fractions of each of the radionuclides present. Biased sampling will be used to bound potential areas of contamination and determine its distribution as a function of depth beneath the surface.

8

4.2 Decision Identification The intent of the characterization survey is to provide the data necessary to document the current radiological status of the area to be impacted by the construction of the ISFSI.

Ideally, the conclusion of the survey will be that the area is not radiologically contaminated. However, if licensed radionuclides are identified, then their activity concentrations will be determined as will their distribution within the area.

4.3 Inputs to the Decision The characterization survey will consist of both qualitative evaluations and quantitative analysis results. The qualitative evaluations will consist of gamma scans. Gamma scanning sensitivities or minimum detectable activities, MDCs, will be estimated based on an assumed geometry and radionuclide mix. Qualitative analysis results will be available from radionuclide specific analysis results using a calibrated counting geometry. Analysis times will be set to achieve the required MDCs.

Initially all samples will be analyzed for gamma emitting radionuclides by gamma spectroscopy A minimum of 10% of all samples collected will be analyzed for Fe-55, Ni-63, and Sr-90.

In addition, any gamma spectroscopy analysis that identifies plant-derived radionuclides in excess of the MDC will be analyzed for Fe-55, Ni-63, and Sr-90.

4.4 Boundaries of the Study This characterization survey will cover the area to be impacted by the construction of the ISFSI. The area is in the southwest corner of the Zion Nuclear Station, immediately south of the Switchyard. Figure 2-1 shows the area to be surveyed. The survey will include surveys of surface (0-15 cm) soils, subsurface (15 to 100cm) soils, and an asphalt road way.

4.5 Decision Rule Initially the sample analysis results associated with plant-derived activity will be compared to the minimum detectable activity associated with each of the analyses to determine if radioactivity was detected in the sample. If radioactivity is detected an evaluation will be made to determine if the radionuclide detected is present in background and if the radionuclide specific activity concentration exceeds the expected background activity concentration. If necessary a material specific (surface soil, subsurface soil, asphalt, etc.) background activity concentrations may be obtained to aid in the evaluation.

Sample analysis results for plant-derived activity that exceed the MDC will be reviewed to ensure that the sample was analyzed for all of the required radionuclides and that the appropriate number of samples was collected to properly bound potential areas of contamination.

9

4.6 Limits on Decision Error Decision errors will be limited by performing the characterization survey in accordance with this plan which specifies the:

• Types of surveys to be performed.

• Instrumentation to be used.

• Number and types of samples to be collected.

• Sample locations.

• Radionuclides to be analyzed.

• Required MDC.

• Decision rules for accessing the data.

• Level of oversight to be provided.

4.7 Design for Data Collection To facilitate data collection, review and evaluation the area to be surveyed will be divided into survey units. Survey packages will be prepared for each survey unit. The survey packages will include:

• A description of the survey unit.

• Provide survey and sampling instructions

• Specify the instrumentation to be used.

• Specify sampling locations.

• Provide sample identification codes for labeling and tracking the samples.

The survey will consist of gamma scans and sampling. Gamma scans will be performed over approximately 50% of the accessible areas and a minimum of 30 systematic sampling locations will be specified in each survey unit. At each sampling location both a surface and subsurface sample will be collected. Samples will be sent to an offsite laboratory for analysis. All samples will be analyzed for gamma emitting radionuclides by gamma spectroscopy. A minimum of 10 percent of the samples will also be analyzed for Fe-55, Ni-63, and Sr-90.

10

5.0 Radionuclides of Concern The predominant observable plant-derived radionuclides found at the Zion Station Remediation Project (ZSRP) are Co-60 and Cs-137. At other power reactor decommissioning sites Cs-137 has been the dominant radionuclide. Other radionuclides may be present in the ZSRP soils including hard to-detect (HTD) radionuclides. These latter radionuclides (Fe-55, Ni-63, Sr-90, etc.)

typically contribute to less than ten percent of the soil radionuclide mixture (and less than 5.0 percent of the dose) and are found in the presence of the mixtures principle radionuclides (Co-60 and Cs-137).

6.0 Survey Area The region designated for the ISFSI is located in survey units 10208, 10218, 10219 102020 and 10221 as defined in the Zion Historical Site Assessment (HSA). The HSA survey unit (SU) descriptions are noted in Table 6-1. Figure 6-1 illustrates the proposed survey region relative to the above survey units.

Figure 6-1 HSA Land Survey Units and Initial Classification The ISFSI region is delineated by the imposed borders. The survey region comprises 23,118 m2 and will be divided into two survey units. The HSA classified the region as a Class 3 survey unit.

If discoveries are made that warrant changing the classification the conditions will be 11

appropriately documented and adjustments made to accommodate any necessary changes to survey design.

Prior to performing the surveys GPS measurements were made to establish the survey unit boundaries (See Figure 2-1). GPS measurements will also be acquired at the Zion site 2000N 2000W Baseline marker to further establish exact coordinates relative to the survey units.

The new survey units for the ISFSI will use the Zion Survey Unit ID of 10218. The survey units and samples will be designated as illustrated in Table 6-2 using the appropriate codes for the samples or surveys acquired.

Table 6-1 HSA Survey Unit Designation Zion HSA ISFSI Survey Zion HSA Locations Area (m2)

Classification Relative Location in Survey Unit Unit ID 10208 South Warehouse Area 3 12,381 Southwest Corner 10218 Near South of ISFSI encompasses nearly all of this 3 17,822 Switchyard SU 10219 Far South of Switchyard 3 12,185 Northern edge of SU Southeast Corner of 102020 Exclusion Area 3 46,964 Northwest Corner of SU Lakeshore South Fenced Area 10221 3 27,297 Western edge of SU Lakeshore 7.0 Survey Design and Methodology The ISFSI land surveys will consist primarily of gamma scan surveys and soil samples. If structures, concrete or asphalt pads remain these locations will be scanned using beta sensitive detectors and direct measurements will be acquired at designated locations. Because debris piles were located in some areas of the survey region additional biased or judgmental samples will be acquired from these locations. Instrument measurement results are assigned sample codes as noted in Table 6-2. The sample code designations are provided in Attachment 14-1 7.1 Land Surveys Land surveys will consist of 50% scan coverage of each survey unit. Judgmental and bias scans will be conducted of debris pile locations, any pads and structure footprints (assuming the material has been removed from the region Land surveys will be conducted using 5.08 by 5.08 cm (2.0 by 2.0 inches) NaI detectors coupled to a Ludlum 2350-1 data logging instrument. When using the NaI detector in scanning mode the instrument time constant will be set to one second and the response time to fast. The detector should be maintained at a constant distance from the survey 12

surface (detector end-cap one to two inches from the soil surface). The scan speed will be 0.25 m/s (~10 inches/s). The scan MDC is 4.16 pCi/g Cs-137.

Note Other detector to surface distances and scan speeds may be used provided that an MDC of 4.16 pCi/g of Cs-137 can be detected.

7.1.1 Gamma scans will include the surveyor listening for an audible change (increase) in the instruments count rate during the scan operation. If the survey area is subject to high noise the use of earphones must be considered. Considerations for conducting audible surveys and responding to increased count rates may include, but is not limited to, slowing the scan speed over the area where the increasing count rate was detected, defining the region of increased count rate and flagging the area for further investigation.

7.1.2 Alarm set points will be used and variations in the local survey area background evaluated, as necessary alarm set points will be adjusted for regions of significant variations (regional background variations of +/-2000 cpm will require new alarm settings). If an alarm is triggered the surveyor should stop the survey, reset the alarm and return to the surface region where the alarm occurred. The region should be re-surveyed without changing the survey performance methodology. Survey speed, detector geometry, alarm set point, and technician should all remain consistent. If the alarm condition is not repeated the surveyor should continue with the survey. If the alarm condition is repeated the surveyor should, note the location and the maximum reading. If locating the alarm area is challenging, flag or otherwise mark the area.

Notify the Radiological Engineer responsible for the ISFSI surveys or the Characterization/License Termination Manager.

7.1.3 If Backpack-GPS gamma scans are conducted the instrument must be capable of detecting 4.16 pCi/g Cs-137. If the surveyor detects a change in count rate during the scan operation that is indicative of an elevated area the location is to be marked for later investigations.

7.2 Structure, Asphalt and Other Media Surveys If structures, asphalt or other similar media exist in the survey area the items will be surveyed using beta scanning and direct measurement techniques. Media samples may be acquired from the pad or structure and consideration given to the collection of media (soils) beneath and immediately adjacent to the pad or structure. Structures or pads will require a separate survey package and be treated as a separate survey unit. More than one pad may be included in a single survey unit.

13

7.2.1 Asphalt Roadway The asphalt roadway adjacent to the Switchyard comprises approximately 700 m2 in area. A For each survey unit a total of 20 percent of the roadway area will be subjected to beta scans surveys. Asphalt sampling is based on the systematic sample locations discussed in Section 8.0. A For each survey unit a total of 20 systematic direct (static) beta measurements will be acquired from the asphalt roadway. The asphalt roadway will be mapped using GPS coordinates and the systematic locations for direct beta measurements will be entered on the map.

These locations may be located on the asphalt surface prior to performing the surveys.

7.2.2 Beta Scan Surveys Beta scans will be performed on asphalt and concrete surfaces to determine if any elevated areas exist. Areas exhibiting count rates in excess of background will be bounded and direct measurements acquired. Samples of the asphalt or other media will be acquired from locations where elevated activity is detected. Beta scanning will be performed at a speed not exceeding one detector window width per second.

Instrumentation may include using beta scintillation or gas-flow proportional detectors.

7.2.3 Direct Beta Measurement Surveys Direct beta (static) measurements will be acquired from systematic locations on structures, asphalt or pad.

7.3 Survey Packages A survey package will be prepared for each survey unit and contain the following information:

• A description of the survey unit.

• The boundaries of the survey unit.

• Instrumentation and detectors including instrument setup details.

• Detailed survey instructions such as, instrument and detector type, scan speed, direct measurement count time, pre and post source check requirements.

• The number, location and type of measurements or samples to be acquired.

• Any action levels or alarm set points

• Sampling codes.

• Any abnormal conditions or safety concerns.

• Any prerequisites that is required prior to sampling or surveys.

• Any individual contact information required prior to or during surveys.

Survey results will be reviewed and summarized for each survey unit and include:

• Identification of surface contamination levels.

• Sample results above any designated action levels.

• Survey results for each direct measurement location.

• Results of each gamma scan grid.

14

• Backgrounds used (determined) for gamma scanning measurements.

• Findings from any investigations performed (separate survey package).

• Instrument alarm findings

• Statistical data if generated.

• The instrument and detector serial numbers used for the surveys.

• Copies of the survey instrument calibration records.

• Copies of the daily source checks and background determination.

• An electronic copy of the raw data collected from instrument downloads.

8.0 Sampling Methodology Multiple sample types will be collected as part of the characterization surveys. This will include systematic samples of surface (0 .0 to 15 cm), subsurface (15 to 100 cm) soils and asphalt.

Depending on the systematic sampling results, gamma scanning results, or surveyor intuition biased samples may also be collected. The biased samples could include surface soils, subsurface soils, asphalt, and miscellaneous debris identified during the ISFSI area surveys. For all samples a minimum of 0.5 liter volume of soil will be collected at each location (~700 g). As necessary, more than one sample may be collected at the same location in order to meet the sample volume requirements. If a second sample is required the sample location should be adjacent and no more than one meter radius of the original sample collection point.

The systematic sampling locations for soil are shown in Figure 2-1. Table 8-1 list the GPS coordinates of each of the systematic sampling locations. The soil sampling locations will be located using the GPS coordinates and a GPS device. If a sample cannot be acquired at a specific location due to structural or utility interferences then the sample locations will be adjusted and the new locations documented.

Table 8-1 Sample Numbers and GPS Coordinates Survey Unit Sample Number* Northing Easting 10218 L310218CSGSSS-A001 343443.8874 641477.2629 10218 L310218CSGSSS -A002 343464.9800 641477.2629 10218 L310218CSGSSS-A003 343412.2485 641495.5296 10218 L310218CSGSSS-A004 343433.3411 641495.5296 10218 L310218CSGSSS-A005 343454.4337 641495.5296 10218 L310218CSGSSS-A006 343401.7022 641513.7963 10218 L310218CSGSSS-A007 343422.7948 641513.7963 10218 L310218CSGSSS-A008 343443.8874 641513.7963 10218 L310218CSGSSS -A009 343464.9800 641513.7963 10218 L310218CSGSSS-A010 343412.2485 641532.0630 10218 L310218CSGSSS -A011 343433.3411 641532.0630 10218 L310218CSGSSS -A012 343454.4337 641532.0630 10218 L310218CSGSSS -A013 343475.5263 641532.0630 10218 L310218CSGSSS-A014 343401.7022 641550.3298 15

Survey Unit Sample Number* Northing Easting 10218 L310218CSGSSS-A015 343422.7948 641550.3298 10218 L310218CSGSSS-A016 343443.8874 641550.3298 10218 L310218CSGSSS-A017 343464.9800 641550.3298 10218 L310218CSGSSS-A018 343412.2485 641568.5965 10218 L310218CSGSSS-A019 343433.3411 641568.5965 10218 L310218CSGSSS-A020 343454.4337 641568.5965 10218 L310218CSGSSS-A021 343475.5263 641568.5965 10218 L310218CSGSSS-A022 343401.7022 641586.8632 10218 L310218CSGSSS-A023 343422.7948 641586.8632 10218 L310218CSGSSS-A024 343443.8874 641586.8632 10218 L310218CSGSSS-A025 343464.9800 641586.8632 10218 L310218CSGSSS-A026 343412.2485 641605.1299 10218 L310218CSGSSS-A027 343433.3411 641605.1299 10218 L310218CSGSSS-A028 343454.4337 641605.1299 10218 L310218CSGSSS-A029 343401.7022 641623.3966 10218 L310218CSGSSS-A030 343422.7948 641623.3966 10218 L310218CSGSSS-B001 343371.5443 641500.8511 10218 L310218CSGSSS-B002 343392.6373 641500.8511 10218 L310218CSGSSS-B003 343318.8117 641519.1182 10218 L310218CSGSSS-B004 343339.9047 641519.1182 10218 L310218CSGSSS-B005 343360.9978 641519.1182 10218 L310218CSGSSS-B006 343382.0908 641519.1182 10218 L310218CSGSSS-B007 343308.2652 641537.3853 10218 L310218CSGSSS-B008 343329.3582 641537.3853 10218 L310218CSGSSS-B009 343350.4512 641537.3853 10218 L310218CSGSSS-B010 343371.5443 641537.3853 10218 L310218CSGSSS-B011 343392.6373 641537.3853 10218 L310218CSGSSS-B012 343318.8117 641555.6524 10218 L310218CSGSSS-B013 343339.9047 641555.6524 10218 L310218CSGSSS-B014 343360.9978 641555.6524 10218 L310218CSGSSS-B015 343382.0908 641555.6524 10218 L310218CSGSSS-B016 343329.3582 641573.9195 10218 L310218CSGSSS-B017 343350.4512 641573.9195 10218 L310218CSGSSS-B018 343371.5443 641573.9195 10218 L310218CSGSSS-B019 343392.6373 641573.9195 10218 L310218CSGSSS-B020 343318.8117 641592.1866 10218 L310218CSGSSS-B021 343339.9047 641592.1866 10218 L310218CSGSSS-B022 343360.9978 641592.1866 10218 L310218CSGSSS-B023 343382.0908 641592.1866 10218 L310218CSGSSS-B024 343329.3582 641610.4537 10218 L310218CSGSSS-B025 343350.4512 641610.4537 16

Survey Unit Sample Number* Northing Easting 10218 L310218CSGSSS-B026 343371.5443 641610.4537 10218 L310218CSGSSS-B027 343392.6373 641610.4537 10218 L310218CSGSSS-B028 343339.9047 641628.7208 10218 L310218CSGSSS-B029 343360.9978 641628.7208 10218 L310218CSGSSS-B030 343382.0908 641628.7208

• Subsurface sample numbers are not included in the above table. Their locations will be the same as the surface soil location. The sample codes will be L310218CSGSSB-A001 through A030 and L310218CSGSSB-B001 through B030.

8.1 Surface Soil Samples A total of 30 systematic surface soil samples will be collected from each survey unit.

Each sample will be collected from a one meter square area horizontal composite to a depth of 15 cm. Surface soil samples (0-15 cm) and samples of any miscellaneous debris will be collected using trowels and similar tools. Surface soil samples will be collected in a manner that excludes the inclusion of vegetation, debris, rocks and other foreign media.

If significant root stock is present the root stock should be removed from the soil mixture prior to counting. Samples may be field sieved prior to packaging using a size 6 or 8 gauge screen.

8.1.1. Large cobble, debris, gravels or other media contained in the sample will be surveyed prior to discarding. The sample should be inspected for other debris such as rust, metals, processed woods or similar media. If debris other than soils is observed it should be noted on the sample collection log or form. All debris discarded shall be surveyed using both beta and gamma sensitive instruments. The survey results are documented and any suspect media preserved for further investigation. The soil sample should also be surveyed using a gamma sensitive detector. Positive survey results above the established detector background should be noted and the sample marked for on-site gamma analysis. All positive survey results will require notification of the ZSRP Radiological Engineer for the ISFSI project or the Characterization/License Termination Manager.

8.2 Subsurface Soil Samples A total of 30 subsurface soil samples will be collected from each survey unit. Subsurface soil samples (15 cm-100 cm) will be collected using a direct push sampling device approximately 2 inches in diameter. The subsurface soil sample will normally be collected from the same location as the surface soil or immediately adjacent to the location. If the subsurface soil sample is collected adjacent to the hole then the top 15 cm of sample should be removed prior to using the push tube. Also see Section 8.1.1.

8.2.1. If a push-tube sample encounters refusal i.e. subsurface media is not collected in the sample tube; additional attempts may be made within one meter radius of the 17

original location. Refusal of any samples will be noted on the sample collection log or form.

8.2.2. The catchers on the ends of direct push samplers and the plastic sample sleeves will be replaced after each push.

8.2.3. Subsurface soil samples may be collected from judgmental and bias locations where debris piles, pads, structures or topographic features are indicative of locations where potential contaminants could reside or have been deposited. Subsurface soils may also be collected in concert with surface soils samples from areas identified as elevated areas due to confirmed elevated gamma scanning measurements.

The location of any biased sampling locations should be marked on an appropriate map.

The coordinates of the biased sampling location should be recorded using a GPS device.

Collection of biased samples should also consider topographic features where runoff, low points and depressions are located.

8.3 Confirmed land survey locations of increased count rates or instrument alarms during scanning surveys will require investigations to be performed. These investigations will require a separate investigation survey package outlining the requirements of the investigation, surveys to be performed and the samples to be collected.

8.4 Asphalt or similar media samples will be collected by coring the media with a coring tool approximately 6 inches in diameter. A one-half liter sample volume (~700 g) should be collected. If systematic soil samples locations include the asphalt roadway, samples of the asphalt roadway (asphalt or concrete) will be required. In addition, a subsurface soil sample will be collected at the same location. Also see section 8.1.

8.5 All sampling tools will be clean prior to use. If necessary, the tools can be cleaned using damp rags, paper towels, putty knifes, wire brushes and similar tools. If conditions warrant, disposable trowels may be used.

8.6 Each sample collected will consist of approximately 0.5 liters of material placed in a 1.0 gallon labeled freezer bag or equivalent and packaged for shipment to an offsite laboratory for analysis. As the samples are collected a sample log will be maintained which provides for each sample collected The log will include:

• Sample ID number

• Sample type (surface soil, subsurface soil, asphalt, etc.)

• Date and time collected

• Name of the Health Physics Technician collecting the sample

• Any other information deemed appropriate at the time of sample collection.

8.7 Prior to shipping the samples to the offsite laboratory chain of custody forms (COC), will be prepared transferring custody of the samples to the offsite laboratory. The COCs will 18

specify the analyses to be performed on each sample and the requested turnaround time for each sample analysis, and to whom the sample analyses should be forwarded.

9.0 Instrumentation Survey instruments and detectors are to be selected based on the energy and type of radiation anticipated in the survey area. The principle radionuclides are Co-60 and Cs-137 (see Section 5.0).

The survey instrument to be used will be the Ludlum 2350-1 data logger. Section 7.1 provides features and settings that will require careful consideration for performing gamma surveys. The detector to be used for gamma scans will be a 5.08 by 5.08 cm NaI (Ludlum Model 44-10 or equivalent). Because the MDC requirement is low (4.16 pCi/g) the normal scan speed (0.5 m/s) may be required to be reduced by fifty percent and the detector distance to the survey surface may also require adjustment.

For surveying structures, asphalt or concrete surfaces the Ludlum 2350-1 instrument will be coupled to either a Model 43-37 or 43-68 gas-flow proportional detectors. The former is a large area detector (584 cm2) floor monitor and the latter is a 126 cm2 hand-held detector. Other beta sensitive detectors may also be used including the Ludlum 43-93 phoswich detector.

The beta sensitive detectors should be calibrated and source checked using a NIST traceable source with beta energies comparable to the principle radionuclides expected to be encountered.

Tc-99 is an acceptable source.

The gamma sensitive instruments should be calibrated and source checked using a check source with gamma energies comparable to the principle radionuclides expected to be encountered. Cs-137 is an acceptable source.

Copies of the source certificates will be included in the report. Daily pre and post survey source checks will be provided for each instrument and detector that is used for ISFSI surveys.

10.0 Sample Handling and Analysis As the samples are collected they will be placed in pre labeled sample containers (1 gallon freezer bags or equivalent). The samples containers will be labeled with individual sample numbers in accordance with the protocol provided in Section 8.0, Table 8-1. For other samples and measurements that may be acquired the protocol found in Attachment 14-1 is used.

Once a Chain of Custody (COC) has been completed the samples will be sent to an offsite laboratory for analysis. The soil samples will be dried and homogenized prior to analysis. Asphalt and debris samples will be homogenized to the extent practical.

All samples will be analyzed by gamma spectroscopy and minimum of 10% of the samples will also be analyzed for Fe-55, Ni-63, and Sr-90. Depending of the sample analysis results, additional samples may also be analyzed for Fe-55, Ni-63, and Sr-90. The offsite laboratory will be 19

instructed to hold the samples for a minimum of 180 days following sample analysis before disposing of them.

11.0 Minimum Detectable Concentration The MDC for beta scanning, direct beta measurements and gamma scanning are provided in Table 11-1.

Table 11-1 Minimum Detectable Concentrations Measurement Type MDC (dpm/100 cm2)

Direct Beta 1.00E+03 Beta Scan 4.00E+03 MDC(pCi/g)

Gamma Scan 4.16 The MDC for gamma spectroscopy and Hard-To-Detect (HTD) radionuclides analysis are listed in Table 11-2 Table 11-2 Analytical MDC Concentrations Radionuclide MDC (pCi/g)

Co-60 <0.1 Cs-137 <0.1 Fe-55 <0.1 Ni-63 <0.1 Sr-90 <0.1 11.1 Beta Scanning MDC The Minimum Detectable Concentration is the detection limit (LD) multiplied by an appropriate conversion factor to give units of activity. The formula used to determine the scanning MDC at the 95% confidence level is:

Where, MDCscan = Minimum Detectable Concentration in dpm/100 cm2 d = index of sensitivity (1.38) bi = background counts per observation interval t = total efficiency p = surveyor efficiency (0.5)

A = detector area in cm2 (not to exceed 126 cm2) 20

The scan speed is based on one detector window width per second however; other scan speeds may be used. For the Ludlum Model 43-68 gas flow proportional detector the window width is 8.8 cm resulting in a scan speed of ~3.5 inches per second. The floor monitor detector is the Ludlum Model 43-37 with a window width of 13.35 cm results in a scan speed of 5.25 inches per second.

11.2 Direct Beta Measurement MDC Direct (static) measurements utilize the following formula:

Where, MDCstatic = Direct (static) measurement MDC in dpm/100 cm2 ts = sample count time tb = background count time Rb = rate of the background (cpm) t = total efficiency A = detector window area (cm2) 11.3 Gamma Scan MDC The gamma scan MDC is discussed in detail in Draft TSD-2011-004, Ludlum Model 44-10 Detector Sensitivity. This Technical Support Document (TSD) examines the gamma sensitivity for 5.08 by 5.08 cm NaI detectors to several radionuclide mixtures of Co-60 and Cs-137 using sand (SiO2) as the soil base. The TSD derives the MDC for the radionuclide mixtures at various detector distances and scan speeds. The TSD model uses essentially the same geometry configuration as the model used in NUREG 1575 (MARSSIM). TSD-2011-004 provides MDC values for the expected ZSRP soil mixture based on detector background condition, scan speed, soil depth (15 cm), soil density (1.6 g/cm3) and detector distance to the suspect surface. The Tables in Attachment 14-2, Cs-137 Scan MDC shows the gamma scan MDC for various background levels where Cs-137 comprises 100 percent of the mixture (or assumed as the surrogate radionuclide).

The parameters are based on a scan speed of 0.25 m/s with the detector end-cap 1.0 to 5 inches from the soil surface. Other parameters are included in the tables.

Based on Attachment 14-2 Table 14-2A for detector background levels of 6.0E+03 to 1.20E+4 cpm the MDC ranges from ~2.8 to 3.95 pCi/g with the detector end cap 1.0 inch from the soil surface. For detector background levels of 6.0E+03 to 1.20E+04 cpm and the end cap 3 inches from the soil surface the MDC ranges from 4.0 to 5.7 pCi/g.

Attachment 14-2 Table 14-2B shows that for a background ranging from 6.00E+03 to 1.0E+04 cpm and the end cap 3.5 inches from the ground the MDC ranges from 3.5 to 21

4.5 pCi/g. As stated earlier, other scan speeds and detector to surface distances may be used provided that the action level of 4.16 pCi/g, Cs-137 can be detected.

12.0 Quality Assurance and Quality Control Numerous assurance and quality control measures will be in place to ensure that all quality requirements related to this characterization survey will be satisfied. All activities that affect quality will be controlled by this plan. The following requirements will help ensure the quality of the results of the characterization survey.

12.1 Plans and Procedures All characterization activities affecting quality will be controlled by approved plans and procedures. In addition to this plan the following EnergySolutions implementing procedures will be used during implementation of the characterization survey.

• CS-FO-PR-001 - Performance of Radiological Surveys

• CS-FO-PR-002 - Calibration and Maintenance of Radiological Survey Instrumentation

• CS-FO-PR-003 - Soil Surveys; Collection of Water, Sediment, Vegetation, and Soil Samples; and Chain- of-Custody

• CS-FO-PR-004 - QA/QC of Portable Radiological Survey Instruments

• CS-FO-PR-005 - General Operation of Radiological Survey Instruments 12.2 Training All personnel participating in this characterization survey will receive site specific training which will include a review of the requirements of this survey plan, a review of the implementing procedures, a review of the survey packages for individual survey units, and a review of any unique features and/or hazards associated with this survey.

12.3 Instrument Selection, Calibration, and Operation The survey instrumentation selected for this characterization survey has proven reliable in the past in detecting the radionuclides of interest. All instrumentation will be calibrated using approved procedures and sources traceable to the National Institute of Standards and Technology (NIST). The minimum detectable activity associated with the use of each instrument will be documented.

Source check criteria will be established for each instrument prior to its initial use for future reference and all instrumentation will be source checked daily, prior to its use and following its use to verify proper operation.

22

12.4 Duplicate Samples A minimum of 5% of all samples to be sent off site for analysis will be split to allow for duplicate analyses. If sufficient activity concentrations are identified in the split sample analyses the results will be evaluated using NRC Inspection Procedure 84750, Radioactive Waste Treatment, And Effluent and Environmental Monitoring, 12.5 Chain of Custodies All samples sent to the offsite laboratory for analysis will be accompanied by a chain of custody (COCs) form to record who is responsible for the samples, what sample analyses is being requested, and the requested turnaround times, TATs. Upon receipt, sample analysis results will be compared to the COCs to ensure all samples were analyzed and that the correct analyses were performed.

12.6 Duplicate Review of Survey Results All survey results will be documented by the Health Physics Technician performing the survey and then reviewed by the Survey Supervisor to ensure the documentation is complete and accurate. A second review of the survey documentation will be performed by a Radiological Engineer/Health Physicist.

13.0 Characterization Survey Data Following the completion of the ISFSI surveys the data will be complied noting the results of the following:

• Radiological surveys of any structures or concrete surfaces and contain for each structure as designated by the survey package:

o A map displaying the systematic direct survey and scan locations.

o Scan survey results of each item and the percent of surfaces scanned.

o The instrumentation used to perform the surveys including calibration data, daily source checks and survey techniques (scan speed).

o Samples acquired and the on-site and/or vendor laboratory results including the MDCs requested for each radionuclide and the analysis methods used.

o A copy of the vendor laboratory QA/QC plan.

o Smear results (if any) including the instrument used, serial number and appropriate QA/QC records and calibration.

o Results of biased or judgmental surveys or samples collected including the reason(s) for acquiring the samples, locations and sampling conditions.

o All results of investigations that may have been performed to qualify surveys, local area conditions, changes in background or instrument response. This includes samples, surveys and logs that may have been collected or created.

o Raw download data if downloads were performed.

o GPS coordinates acquired during the survey process and the reason for their acquisition (relative to mapping or sample locations).

23

o Any locations of elevated survey or sample activity will be noted and bounded on a map and include the activity values and bounding conditions.

• Radiological surveys of land areas as designated by the ISFSI survey plan or established during the survey and sampling operation.

o A map displaying the scan survey region, scan locations and percent of surfaces scanned.

o The instrumentation used to perform the surveys including calibration data, daily source checks and survey techniques (scan speed and detector to surface distance).

o Samples acquired and the on-site and/or vendor laboratory results including the MDCs requested for each radionuclide and the analysis methods used.

o A copy of the vendor laboratory QA/QC plan.

o Results of biased or judgmental surveys or samples collected including the reason(s) for acquiring the samples, locations and sampling conditions.

o Any refusal sample locations and the location of additional samples acquired near the original location.

o All results of investigations that may have been performed to qualify surveys, local area conditions, changes in background or instrument response. This includes samples, surveys and logs that may have been created.

o GPS coordinates acquired during the survey process and the reason for their acquisition (relative to mapping or sample locations).

o Any locations of elevated survey or sample activity will be noted and bounded on a map and include the activity values and bounding condition.

14.0 Attachments 14.1 Sample and Measurement Unique Identification Designation Codes 14.2 Cs-137 Scan MDC for Ludlum 44-10 Detector 15.0 References 15.1 Zion Nuclear Generating Station Historical Site Assessment Summary, ComEd Decommissioning Projects, R. Akers, August 1999.

15.2 Zion Nuclear Station Draft Characterization Survey Plan, September 2011.

15.3 U.S. Nuclear Regulatory Commission, Consolidated Decommissioning Guidance, Characterization, Surveys and Determination of Radiological Criteria, NUREG-1757V2R1, September 2006.

15.4 U.S. Nuclear Regulatory Commission, A Nonparametric Statistical Methodology for the Design and Analysis of Final Status Decommissioning Surveys, NUREG-1505 Revision 1, June 1998.

15.5 U.S. Nuclear Regulatory Commission, Multi-Agency Radiation Survey and Site Investigation Manual (MARSSIM), NUREG-1575, Revision 1, August 2000, with June 2001 updates.

24

15.6 Draft Technical Support Document, Ludlum Model 44-10 Detector Sensitivity, Zion Solutions, September 2011 15.7 U.S. Nuclear Regulatory Commission, NRC Inspection Manual - Inspection Procedure 84750, Radioactive Waste Treatment, and Effluent and Environmental Monitoring, March 15, 1994.

25

Attachment 14-1 Sample and Measurement Unique Identification Designation Codes 4-1 provides the sample and measurement coding identification descriptions for labeling and identifying samples and measurements.

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12) (13) (14) (15) (16) (17)

Survey Sequence Indicator and Classification and Survey Surface Media Measurement Sample or Survey Area Unit ID Type Type Type Measurement Number Example using ISFSI coding (Survey Unit 10218) for a surface soil sample:

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12) (13) (14) (15) (16) (17)

L 3 1 0 2 1 8 C S G S S S A 0 0 1 Classification and Survey Area 1st alphanumeric indicated type of Survey Area L = Open Land Area B = Structure Type Survey S = System 2nd alphanumeric indicated Classification 1 = Class 1 2 = Class 2 3 = Class 3 4 = Non-impacted 3rd, 4th and 5th alphanumeric indicates Survey Area (The ISFSI area is designated 102) from the HSA designation 10218 Survey area number is found in the Characterization Plan.

Survey Unit Number 6th and 7th alphanumeric indicates the Survey Unit Number For the ISFSI the code is 18 Survey and Measurement Type 8th alphanumeric indicates the Survey and Measurement Type 26

B = Background S = Scoping C= Characterization R = Remediation F = FSS I = Investigation V = Verification Q = QA/QC 9th alphanumeric indicates the Type of Measurement B = Background R = Random S = Systematic J = Judgmental I = Investigation V = Verification Q = QA/QC D = Duplicate Surface Type 10th alphanumeric indicates the Type of Surface where the measurement was taken F= Floor W = Wall C = Ceiling S = System R = Roof P= Paved Road G = Ground L = Water 11th alphanumeric indicates the Material Composition where the measurement was taken C = Concrete M = Metal W = Wood B = Cinder Block K + Brick A = Asphalt S = Soil T = Tar L = Liquid Media Type 12th and 13th alphanumeric indicates the Type of Media from which the sample originated SS = Surface Soil SB = Subsurface Soil SM = Sediment WT = Water 27

LQ = Other Liquid besides water OL = Oil CV = Volumetric Concrete AV = Volumetric Asphalt MT = Metal PT = Paint SW = Smear Sample TB = Total Surface Contamination (Static) Beta Measurement TA = Total Surface Contamination (Static) Alpha Measurement GM = Gamma Measurement Sequence indicator and Sample or Measurement Number 14th alphanumeric Is the Sequence Indicator (Sequence A-J) allows the SU to be divided into 10 smaller survey units (Sequence K-Z) allows for up to 16 different survey instructions for a single survey unit.

15th, 16th and 17th alphanumeric is the three digit sequential measurement number Sequentially, 001 through 999 28

Attachment 14-2 Cs-137 Gamma Scan MDC for Ludlum 44-10 Detector Table 14-2A Soil Scan MDC For Ludlum 44-10 NaI Detector Scan Rate = 0.25 m/s 100% Cs-137 1.0 pCi/g Using Sand (SiO2)

Detector end-cap 1" above Soil Surface @ Detector Centerline (5.08 [2.0"])

Detectable Detectable µR/h/pCi/g 11/9/2011 Exp. Rate Exp. Rate Detectable Microshield Counts cpm/uR/h Scan 44-10 Bkg per ==> 430 940 Exp. Rate Results MDC 0.5 Co-60 Cs-137 cpm second MDCR MDCRsurveyor µR/h µR/h Total µR/h @5.08 cm pCi/g 1.00E+03 8.33E+00 2.39E+02 3.38E+02 0.00E+00 3.60E-01 3.60E-01 0.3235 1.1 2.00E+03 1.67E+01 3.38E+02 4.78E+02 0.00E+00 5.09E-01 5.09E-01 0.3235 1.57 4.00E+03 3.33E+01 4.78E+02 6.76E+02 0.00E+00 7.19E-01 7.19E-01 0.3235 2.22 6.00E+03 5.00E+01 5.85E+02 8.28E+02 0.00E+00 8.81E-01 8.81E-01 0.3235 2.72 8.00E+03 6.67E+01 6.76E+02 9.56E+02 0.00E+00 1.02E+00 1.02E+00 0.3235 3.14 1.00E+04 8.33E+01 7.56E+02 1.07E+03 0.00E+00 1.14E+00 1.14E+00 0.3235 3.52 1.20E+04 1.00E+02 8.28E+02 1.17E+03 0.00E+00 1.25E+00 1.25E+00 0.3235 3.85 1.40E+04 1.17E+02 8.94E+02 1.26E+03 0.00E+00 1.35E+00 1.35E+00 0.3235 4.16 1.80E+04 1.50E+02 1.01E+03 1.43E+03 0.00E+00 1.53E+00 1.53E+00 0.3235 4.72 2.00E+04 1.67E+02 1.07E+03 1.51E+03 0.00E+00 1.61E+00 1.61E+00 0.3235 4.97 4.00E+04 3.33E+02 1.51E+03 2.14E+03 0.00E+00 2.27E+00 2.27E+00 0.3235 7.03 6.00E+04 5.00E+02 1.85E+03 2.62E+03 0.00E+00 2.79E+00 2.79E+00 0.3235 8.61 8.00E+04 6.67E+02 2.14E+03 3.02E+03 0.00E+00 3.22E+00 3.22E+00 0.3235 9.94 1.00E+05 8.33E+02 2.39E+03 3.38E+03 0.00E+00 3.60E+00 3.60E+00 0.3235 11.12 6.0 5.0 3.0" from endcap 4.0 pCi/g 3.0 1.0" from endcap 2.0 1.0 0.0 0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 11000 12000 13000 14000 CPM 29

Soil Scan MDC For Ludlum 44-10 NaI Detector Scan Rate = 0.25 m/s 100% Cs-137 1.0 pCi/g Using Sand (SiO2)

Detector end-cap 2.0" above Soil Surface @ Detector Centerline 7.62 cm (3.0")

Detectable Detectable µR/h/pCi/g 11/9/2011 Exp. Rate Exp. Rate Detectable Microshield Counts cpm/uR/h Scan 44-10 Bkg per ==> 430 940 Exp. Rate Results MDC 0.5 Co-60 Cs-137 cpm second MDCR MDCRsurveyor µR/h µR/h Total µR/h @7.62 cm pCi/g 1.00E+03 8.33E+00 2.39E+02 3.38E+02 0.00E+00 3.60E-01 3.60E-01 0.2683 1.3 2.00E+03 1.67E+01 3.38E+02 4.78E+02 0.00E+00 5.09E-01 5.09E-01 0.2683 1.90 4.00E+03 3.33E+01 4.78E+02 6.76E+02 0.00E+00 7.19E-01 7.19E-01 0.2683 2.68 6.00E+03 5.00E+01 5.85E+02 8.28E+02 0.00E+00 8.81E-01 8.81E-01 0.2683 3.28 8.00E+03 6.67E+01 6.76E+02 9.56E+02 0.00E+00 1.02E+00 1.02E+00 0.2683 3.79 1.00E+04 8.33E+01 7.56E+02 1.07E+03 0.00E+00 1.14E+00 1.14E+00 0.2683 4.24 1.20E+04 1.00E+02 8.28E+02 1.17E+03 0.00E+00 1.25E+00 1.25E+00 0.2683 4.64 1.40E+04 1.17E+02 8.94E+02 1.26E+03 0.00E+00 1.35E+00 1.35E+00 0.2683 5.01 1.80E+04 1.50E+02 1.01E+03 1.43E+03 0.00E+00 1.53E+00 1.53E+00 0.2683 5.69 2.00E+04 1.67E+02 1.07E+03 1.51E+03 0.00E+00 1.61E+00 1.61E+00 0.2683 5.99 4.00E+04 3.33E+02 1.51E+03 2.14E+03 0.00E+00 2.27E+00 2.27E+00 0.2683 8.48 6.00E+04 5.00E+02 1.85E+03 2.62E+03 0.00E+00 2.79E+00 2.79E+00 0.2683 10.38 8.00E+04 6.67E+02 2.14E+03 3.02E+03 0.00E+00 3.22E+00 3.22E+00 0.2683 11.99 1.00E+05 8.33E+02 2.39E+03 3.38E+03 0.00E+00 3.60E+00 3.60E+00 0.2683 13.40 Soil Scan MDC For Ludlum 44-10 NaI Detector Scan Rate = 0.25 m/s 100% Cs-137 1.0 pCi/g Using Sand (SiO2)

Detector end-cap 3.0" above Soil Surface @ Detector Centerline 10.16 cm (4.0")

Detectable Detectable µR/h/pCi/g 11/9/2011 Exp. Rate Exp. Rate Detectable Microshield Counts cpm/uR/h Scan 44-10 Bkg per ==> 430 940 Exp. Rate Results MDC 0.5 Co-60 Cs-137 cpm second MDCR MDCRsurveyor µR/h µR/h Total µR/h @10.0 cm pCi/g 1.00E+03 8.33E+00 2.39E+02 3.38E+02 0.00E+00 3.60E-01 3.60E-01 0.225 1.6 2.00E+03 1.67E+01 3.38E+02 4.78E+02 0.00E+00 5.09E-01 5.09E-01 0.225 2.26 4.00E+03 3.33E+01 4.78E+02 6.76E+02 0.00E+00 7.19E-01 7.19E-01 0.225 3.20 6.00E+03 5.00E+01 5.85E+02 8.28E+02 0.00E+00 8.81E-01 8.81E-01 0.225 3.91 8.00E+03 6.67E+01 6.76E+02 9.56E+02 0.00E+00 1.02E+00 1.02E+00 0.225 4.52 1.00E+04 8.33E+01 7.56E+02 1.07E+03 0.00E+00 1.14E+00 1.14E+00 0.225 5.05 1.20E+04 1.00E+02 8.28E+02 1.17E+03 0.00E+00 1.25E+00 1.25E+00 0.225 5.54 1.40E+04 1.17E+02 8.94E+02 1.26E+03 0.00E+00 1.35E+00 1.35E+00 0.225 5.98 1.80E+04 1.50E+02 1.01E+03 1.43E+03 0.00E+00 1.53E+00 1.53E+00 0.225 6.78 2.00E+04 1.67E+02 1.07E+03 1.51E+03 0.00E+00 1.61E+00 1.61E+00 0.225 7.15 4.00E+04 3.33E+02 1.51E+03 2.14E+03 0.00E+00 2.27E+00 2.27E+00 0.225 10.11 6.00E+04 5.00E+02 1.85E+03 2.62E+03 0.00E+00 2.79E+00 2.79E+00 0.225 12.38 8.00E+04 6.67E+02 2.14E+03 3.02E+03 0.00E+00 3.22E+00 3.22E+00 0.225 14.30 1.00E+05 8.33E+02 2.39E+03 3.38E+03 0.00E+00 3.60E+00 3.60E+00 0.225 15.98 30

Attachment 1-2 SU10218A East Side of ISFSI Gamma Spectroscopy Analysis

Attachment 1-2 10218A East Side of ISFSI Area Gam m a Spectroscopy Analysis Results (in pCi/g) 4/12/2012 Collection Sam ple 2.0 2.0 2.0 2.0 2.0 2.0 Sam ple ID Date Media Ac-228 Error Am -241 Error Co-60 Error Cs-134 Error Cs-137 Error Eu-154 Error L310218CSGSSSA001 11/12/2011 Soil 3.74E-01 7.44E-02 < 5.91E-02 < 3.30E-02 < 2.60E-02 < 3.30E-02 < 8.22E-02 L310218CSGSSBA001 11/12/2011 Soil 2.89E-01 6.59E-02 < 4.65E-02 < 3.10E-02 < 2.09E-02 3.08E-02 2.34E-02 < 7.11E-02 L310218CSGSSSA002 11/12/2011 Soil 2.26E-01 8.70E-02 < 6.10E-02 < 3.93E-02 < 2.84E-02 5.86E-02 2.34E-02 < 9.71E-02 L310218CSGSSBA002 11/12/2011 Soil 3.03E-01 8.05E-02 < 6.29E-02 < 4.43E-02 < 2.71E-02 < 3.32E-02 < 9.41E-02 L310218CSGSSSA003 11/14/2011 Soil 3.60E-01 7.81E-02 < 6.02E-02 < 4.64E-02 < 2.72E-02 < 3.70E-02 < 1.06E-01 L310218CDGSSSA003 11/14/2011 Soil 3.09E-01 8.69E-02 < 6.47E-02 < 4.50E-02 < 2.30E-02 4.64E-02 2.28E-02 < 1.14E-01 L310218CSGSSBA003 11/14/2011 Soil 3.90E-01 8.28E-02 < 7.05E-02 < 4.72E-02 < 2.97E-02 < 3.54E-02 < 1.25E-01 L310218CSGSSSA004 11/14/2011 Soil 3.28E-01 7.42E-02 < 5.31E-02 < 4.25E-02 < 2.37E-02 4.14E-02 3.06E-02 < 9.44E-02 L310218CSGSSBA004 11/14/2011 Soil 2.74E-01 1.09E-01 < 5.89E-02 < 3.64E-02 < 2.45E-02 7.96E-02 2.58E-02 < 1.15E-01 L310218CSGSSSA005 11/14/2011 Soil 3.23E-01 7.07E-02 < 6.64E-02 < 3.84E-02 < 2.42E-02 < 3.98E-02 < 8.52E-02 L310218CSGSSBA005 11/14/2011 Soil 2.83E-01 6.93E-02 < 4.83E-02 < 3.62E-02 < 2.10E-02 3.23E-02 2.12E-02 < 7.84E-02 L310218CSGSSSA006 11/14/2011 Soil 2.63E-01 9.10E-02 < 6.07E-02 < 3.66E-02 < 2.66E-02 3.60E-02 2.64E-02 < 1.03E-01 L310218CSGSSBA006 11/14/2011 Soil 4.07E-01 8.01E-02 < 6.69E-02 < 3.77E-02 < 2.46E-02 < 3.01E-02 < 9.16E-02 L310218CSGSSSA007 11/14/2011 Soil 3.38E-01 7.38E-02 < 5.22E-02 < 4.10E-02 < 2.50E-02 < 3.29E-02 < 9.57E-02 L310218CSGSSBA007 11/14/2011 Soil 3.65E-01 7.90E-02 < 6.19E-02 < 4.65E-02 < 2.56E-02 < 3.21E-02 < 1.03E-01 L310218CSGSSSA008 11/14/2011 Soil 2.82E-01 8.08E-02 < 5.77E-02 < 3.36E-02 < 2.30E-02 < 2.96E-02 < 6.68E-02 L310218CSGSSBA008 11/14/2011 Soil 2.93E-01 6.53E-02 < 5.36E-02 < 3.61E-02 < 2.14E-02 < 3.04E-02 < 8.07E-02 L310218CSGSSSA009 11/14/2011 Soil 3.88E-01 9.37E-02 < 6.53E-02 < 3.73E-02 < 2.87E-02 < 3.14E-02 < 9.70E-02 L310218CSGSSBA009 11/14/2011 Soil 3.48E-01 6.57E-02 < 4.69E-02 < 3.48E-02 < 2.21E-02 6.95E-02 2.21E-02 < 7.90E-02 L310218CSGSSSA010 11/14/2011 Soil 1.76E-01 6.21E-02 < 4.66E-02 < 2.99E-02 < 2.34E-02 < 2.56E-02 < 6.88E-02 L310218CSGSSBA010 11/14/2011 Soil 3.60E-01 1.07E-01 < 8.41E-02 < 6.98E-02 < 5.55E-02 < 5.37E-02 < 1.93E-01 4/12/2012 Collection Sam ple 2.0 2.0 2.0 2.0 2.0 2.0 Sam ple ID Date Media Eu-155 Error I-129 Error K-40 Error Pb-214 Error Tl-208 Error U-235 Error L310218CSGSSSA001 11/12/2011 Soil < 7.02E-02 < 5.55E-02 8.78E+00 1.14E+00 2.93E-01 4.99E-02 2.33E-01 5.35E-02 < 1.48E-01 L310218CSGSSBA001 11/12/2011 Soil < 5.87E-02 < 6.39E-02 7.16E+00 8.86E-01 2.34E-01 4.32E-02 2.84E-01 4.83E-02 < 1.40E-01 L310218CSGSSSA002 11/12/2011 Soil < 7.50E-02 < 9.10E-02 6.98E+00 9.34E-01 2.61E-01 6.33E-02 3.06E-01 5.98E-02 < 1.77E-01 L310218CSGSSBA002 11/12/2011 Soil < 7.33E-02 < 7.40E-02 5.09E+00 7.69E-01 2.81E-01 5.13E-02 3.11E-01 1.05E-01 < 1.55E-01 L310218CSGSSSA003 11/14/2011 Soil < 7.55E-02 < 8.15E-02 9.54E+00 1.17E+00 3.51E-01 5.77E-02 3.37E-01 8.59E-02 < 1.76E-01 L310218CDGSSSA003 11/14/2011 Soil < 7.22E-02 < 7.73E-02 8.19E+00 1.09E+00 2.90E-01 4.65E-02 1.93E-01 8.40E-02 < 1.45E-01 L310218CSGSSBA003 11/14/2011 Soil < 7.94E-02 < 8.01E-02 1.01E+01 1.28E+00 5.04E-01 7.04E-02 3.01E-01 6.87E-02 < 1.79E-01 L310218CSGSSSA004 11/14/2011 Soil < 6.87E-02 < 7.54E-02 9.00E+00 1.10E+00 3.32E-01 4.85E-02 2.71E-01 5.28E-02 < 1.57E-01 L310218CSGSSBA004 11/14/2011 Soil < 6.82E-02 < 7.06E-02 6.53E+00 9.05E-01 2.87E-01 4.92E-02 2.17E-01 5.34E-02 < 1.46E-01 L310218CSGSSSA005 11/14/2011 Soil < 7.52E-02 < 6.74E-02 9.26E+00 1.20E+00 3.34E-01 5.17E-02 2.41E-01 5.58E-02 < 1.79E-01 L310218CSGSSBA005 11/14/2011 Soil < 6.00E-02 < 6.66E-02 8.25E+00 9.97E-01 3.34E-01 4.75E-02 3.55E-01 8.19E-02 < 1.44E-01 L310218CSGSSSA006 11/14/2011 Soil < 7.20E-02 < 7.64E-02 9.01E+00 1.16E+00 3.15E-01 6.20E-02 2.39E-01 5.75E-02 < 1.43E-01 L310218CSGSSBA006 11/14/2011 Soil < 6.70E-02 < 6.43E-02 1.18E+01 1.47E+00 4.82E-01 6.46E-02 3.59E-01 6.72E-02 < 1.69E-01 L310218CSGSSSA007 11/14/2011 Soil < 6.44E-02 < 7.56E-02 8.23E+00 1.03E+00 2.86E-01 5.00E-02 2.52E-01 5.79E-02 < 1.53E-01 L310218CSGSSBA007 11/14/2011 Soil < 7.13E-02 < 8.77E-02 7.22E+00 9.71E-01 3.24E-01 4.68E-02 2.35E-01 6.32E-02 < 1.48E-01 L310218CSGSSSA008 11/14/2011 Soil < 7.10E-02 < 6.69E-02 7.48E+00 9.91E-01 3.49E-01 5.06E-02 2.39E-01 5.36E-02 < 1.58E-01 L310218CSGSSBA008 11/14/2011 Soil < 6.21E-02 < 6.57E-02 9.86E+00 1.14E+00 3.00E-01 4.74E-02 2.44E-01 5.15E-02 < 1.43E-01 L310218CSGSSSA009 11/14/2011 Soil < 8.26E-02 < 6.80E-02 9.06E+00 1.18E+00 4.42E-01 6.08E-02 2.66E-01 5.80E-02 < 1.82E-01 L310218CSGSSBA009 11/14/2011 Soil < 6.19E-02 < 6.39E-02 6.81E+00 8.78E-01 3.22E-01 4.65E-02 2.97E-01 5.72E-02 < 1.47E-01 L310218CSGSSSA010 11/14/2011 Soil < 5.21E-02 < 6.11E-02 3.77E+00 5.93E-01 1.35E-01 3.72E-02 1.31E-01 3.90E-02 < 1.16E-01 L310218CSGSSBA010 11/14/2011 Soil < 9.94E-02 < 9.06E-02 1.02E+01 1.59E+00 4.03E-01 8.46E-02 2.69E-01 8.44E-02 < 2.46E-01

Attachment 1-2 10218A East Side of ISFSI Area Gam m a Spectroscopy Analysis Results (in pCi/g) 4/12/2012 Collection Sam ple 2.0 2.0 2.0 2.0 2.0 s 2.0 s Sam ple ID Date Media Ac-228 Error Am -241 Error Co-60 Error Cs-134 Error Cs-137 Error Eu-154 Error L310218CSGSSSA011 11/14/2011 Soil 2.22E-01 6.97E-02 < 4.30E-02 < 3.33E-02 < 2.09E-02 < 2.54E-02 < 7.70E-02 L310218CSGSSBA011 11/14/2011 Soil 2.65E-01 7.38E-02 < 5.17E-02 < 3.25E-02 < 2.64E-02 < 2.85E-02 < 9.34E-02 L310218CSGSSSA012 11/14/2011 Soil 4.03E-01 1.16E-01 < 7.78E-02 < 6.92E-02 < 4.94E-02 < 5.92E-02 < 1.69E-01 L310218CSGSSBA012 11/14/2011 Soil 1.92E-01 8.34E-02 < 5.22E-02 < 3.21E-02 < 2.08E-02 < 2.68E-02 < 7.86E-02 L310218CSGSSSA013 11/12/2011 Soil 3.56E-01 6.46E-02 < 4.95E-02 < 3.80E-02 < 2.37E-02 4.13E-02 2.74E-02 < 8.80E-02 L310218CSGSSBA013 11/12/2011 Soil 2.98E-01 7.53E-02 < 5.69E-02 < 3.68E-02 < 2.60E-02 5.43E-02 2.94E-02 < 1.02E-01 L310218CSGSSSA014 11/12/2011 Soil 3.11E-01 6.55E-02 < 5.31E-02 < 3.22E-02 < 1.99E-02 3.16E-02 2.15E-02 < 7.86E-02 L310218CSGSSBA014 11/12/2011 Soil 3.14E-01 1.01E-01 < 7.31E-02 < 6.09E-02 < 5.00E-02 < 5.58E-02 < 1.47E-01 L310218CSGSSSA015 11/12/2011 Soil 1.46E-01 4.98E-02 < 4.10E-02 < 2.82E-02 < 1.90E-02 < 3.06E-02 < 7.20E-02 L310218CSGSSBA015 11/12/2011 Soil 3.10E-01 7.93E-02 < 5.96E-02 < 4.19E-02 < 2.62E-02 2.93E-02 2.39E-02 < 9.45E-02 L310218CSGSSSA016 11/12/2011 Soil 3.90E-01 1.14E-01 < 8.30E-02 < 7.10E-02 < 4.97E-02 < 6.31E-02 < 2.21E-01 L310218CSGSSBA016 11/12/2011 Soil 2.94E-01 7.04E-02 < 5.35E-02 < 3.18E-02 < 2.33E-02 5.55E-02 3.01E-02 < 8.63E-02 L310218CSGSSSA017 11/12/2011 Soil 2.91E-01 7.71E-02 < 5.43E-02 < 3.17E-02 < 2.05E-02 4.57E-02 2.87E-02 < 8.08E-02 L310218CSGSSBA017 11/12/2011 Soil 3.10E-01 6.66E-02 < 4.58E-02 < 3.18E-02 < 2.22E-02 5.64E-02 1.75E-02 < 8.45E-02 L310218CSGSSSA018 11/12/2011 Soil 2.52E-01 6.89E-02 < 5.57E-02 < 4.08E-02 < 2.35E-02 3.04E-02 3.25E-02 < 1.10E-01 L310218CSGSSBA018 11/12/2011 Soil 2.96E-01 1.00E-01 < 6.57E-02 < 5.25E-02 < 4.60E-02 < 4.40E-02 < 1.24E-01 L310218CSGSSSA019 11/12/2011 Soil < 8.74E-02 < 3.25E-02 < 2.33E-02 < 1.78E-02 < 2.14E-02 < 5.57E-02 L310218CSGSSBA019 11/12/2011 Soil 3.65E-01 7.35E-02 < 6.37E-02 < 3.20E-02 < 2.55E-02 < 3.04E-02 < 9.21E-02 L310218CSDSSBA019 11/12/2011 Soil 3.59E-01 8.82E-02 < 7.18E-02 < 4.73E-02 < 2.94E-02 < 3.68E-02 < 1.23E-01 L310218CSGSSSA020 11/12/2011 Soil 2.74E-01 9.44E-02 < 6.24E-02 < 6.43E-02 < 4.22E-02 < 4.25E-02 < 1.48E-01 L310218CSGSSBA020 11/12/2011 Soil 3.21E-01 7.11E-02 , 4.34E-02 < 2.83E-02 < 1.83E-02 4.87E-02 2.24E-02 < 7.73E-02 4/12/2012 Collection Sam ple 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s Sam ple ID Date Media Eu-155 Error I-129 Error K-40 Error Pb-214 Error Tl-208 Error U-235 Error L310218CSGSSSA011 11/14/2011 Soil < 5.51E-02 < 6.50E-02 6.44E+00 8.09E-01 1.84E-01 3.89E-02 2.17E-01 5.13E-02 < 1.32E-01 L310218CSGSSBA011 11/14/2011 Soil < 6.17E-02 < 6.26E-02 5.41E+00 7.54E-01 1.99E-01 4.99E-02 2.17E-01 5.08E-02 < 1.29E-01 L310218CSGSSSA012 11/14/2011 Soil < 8.83E-02 < 8.13E-02 8.67E+00 1.37E+00 3.52E-01 7.04E-02 2.57E-01 8.80E-02 < 2.30E-01 L310218CSGSSBA012 11/14/2011 Soil < 6.02E-02 < 4.78E-02 8.81E+00 1.11E+00 2.63E-02 4.28E-02 2.75E-01 5.44E-02 < 1.35E-01 L310218CSGSSSA013 11/12/2011 Soil < 6.19E-02 < 6.07E-02 1.04E+01 1.19E+00 3.07E-01 4.49E-02 3.05E-01 5.79E-02 < 1.43E-01 L310218CSGSSBA013 11/12/2011 Soil < 6.85E-02 < 7.23E-02 6.95E+00 9.61E-01 2.62E-01 5.06E-02 2.84E-01 5.49E-02 < 1.47E-01 L310218CSGSSSA014 11/12/2011 Soil < 6.84E-02 < 5.77E-02 7.92E+00 1.05E+00 2.75E-01 4.49E-02 2.23E-01 5.22E-02 < 1.53E-01 L310218CSGSSBA014 11/12/2011 Soil < 8.78E-02 < 7.86E-02 7.24E+00 1.14E+00 4.37E-01 8.82E-02 2.60E-01 9.47E-02 < 2.06E-01 L310218CSGSSSA015 11/12/2011 Soil < 4.78E-02 < 6.63E-02 3.96E+00 5.94E-01 1.77E-01 3.59E-02 1.43E-01 5.81E-02 < 1.21E-01 L310218CSGSSBA015 11/12/2011 Soil < 7.19E-02 < 7.07E-02 8.87E+00 1.13E+00 3.76E-01 5.71E-02 2.21E-01 4.96E-02 < 1.60E-01 L310218CSGSSSA016 11/12/2011 Soil < 9.42E-02 < 9.05E-02 1.01E+01 1.52E+00 4.13E-01 8.36E-02 3.06E-01 8.88E-02 < 2.24E-01 L310218CSGSSBA016 11/12/2011 Soil < 5.93E-02 < 6.28E-02 7.71E+00 9.77E-01 3.00E-01 4.67E-02 2.59E-01 8.55E-02 < 1.36E-01 L310218CSGSSSA017 11/12/2011 Soil < 6.75E-02 < 5.92E-02 8.00E+00 1.03E+00 2.98E-01 4.15E-02 2.36E-01 4.86E-02 < 1.55E-01 L310218CSGSSBA017 11/12/2011 Soil < 5.69E-02 < 5.89E-02 8.02E+00 9.46E-01 3.28E-01 4.40E-02 2.56E-01 5.05E-02 < 1.34E-01 L310218CSGSSSA018 11/12/2011 Soil < 6.27E-02 < 6.74E-02 6.90E+00 9.25E-01 3.01E-01 5.43E-02 1.92E-01 5.33E-02 < 1.44E-01 L310218CSGSSBA018 11/12/2011 Soil < 7.08E-02 < 6.93E-02 8.22E+00 1.23E+00 1.94E-01 6.00E-02 2.17E-01 7.97E-02 < 1.92E-01 L310218CSGSSSA019 11/12/2011 Soil < 3.92E-02 < 6.26E-02 1.41E+00 3.01E-01 1.14E-01 3.18E-02 < 3.00E-02 < 1.06E-01 L310218CSGSSBA019 11/12/2011 Soil < 7.18E-02 < 6.34E-02 9.99E+00 1.27E+00 3.79E-01 5.78E-02 3.29E-01 7.07E-02 < 1.64E-01 L310218CSDSSBA019 11/12/2011 Soil < 7.72E-02 < 8.79E-02 9.79E+00 1.28E+00 3.65E-01 7.24E-02 2.54E-01 5.80E-02 < 1.77E-01 L310218CSGSSSA020 11/12/2011 Soil < 7.18E-02 < 7.18E-02 8.01E+00 1.26E+00 2.65E-01 5.59E-02 1.52E-01 6.35E-02 < 1.76E-01 L310218CSGSSBA020 11/12/2011 Soil < 4.45E-02 < 5.74E-02 8.73E+00 1.00E+00 2.73E-01 4.46E-02 2.28E-01 4.74E-02 < 1.29E-01 3

Attachment 1-2 10218A East Side of ISFSI Area Gam m a Spectroscopy Analysis Results (in pCi/g) 4/12/2012 Collection Sam ple 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s Sam ple ID Date Media Ac-228 Error Am -241 Error Co-60 Error Cs-134 Error Cs-137 Error Eu-154 Error L310218CSGSSSA021 11/12/2011 Soil 3.29E-01 6.21E-02 < 5.48E-02 < 3.74E-02 < 2.13E-02 7.38E-02 2.11E-02 < 7.69E-02 L310218CSGSSBA021 11/12/2011 Soil 1.96E-01 9.15E-02 < 5.34E-02 < 3.69E-02 < 2.45E-02 < 2.97E-02 < 9.91E-01 L310218CDGSSBA021 11/12/2011 Soil 2.67E-01 1.03E-01 < 6.68E-02 < 6.35E-02 < 4.39E-02 < 4.59E-02 < 1.52E-01 L310218CSGSSSA022 11/12/2011 Soil 3.19E-01 1.37E-01 < 6.84E-02 < 4.19E-02 < 3.13E-02 2.02E-02 2.09E-02 < 9.39E-02 L310218CDGSSSA022 11/12/2011 Soil 2.82E-01 1.48E-01 < 7.63E-02 < 4.50E-02 < 3.60E-02 < 4.56E-02 < 1.45E-01 L310218CSGSSBA022 11/12/2011 Soil 3.27E-01 1.86E-01 < 8.32E-02 < 7.01E-02 < 5.53E-02 < 5.85E-02 < 1.71E-01 L310218CSGSSSA023 11/12/2011 Soil 3.62E-01 7.28E-02 < 5.86E-02 < 3.78E-02 < 2.33E-02 < 2.82E-02 < 1.08E-01 L310218CSGSSBA023 11/12/2011 Soil 2.73E-01 6.59E-02 < 5.13E-02 < 2.89E-02 < 2.10E-02 < 2.86E-02 < 7.27E-02 L310218CSGSSSA024 11/12/2011 Soil 2.23E-01 7.76E-02 < 5.58E-02 < 3.74E-02 < 2.45E-02 5.52E-02 2.57E-02 < 9.94E-02 L310218CSGSSBA024 11/12/2011 Soil 2.48E-01 5.01E-02 < 4.07E-02 < 2.16E-02 < 1.47E-02 3.16E-02 2.23E-02 < 6.38E-02 L310218CSGSSSA025 11/12/2011 Soil 3.71E-01 1.08E-01 < 6.69E-02 < 6.64E-02 < 4.21E-02 < 4.45E-02 < 1.47E-01 L310218CSGSSBA025 11/12/2011 Soil 2.74E-01 6.60E-02 < 4.13E-02 < 3.18E-02 < 1.88E-02 1.92E-02 1.45E-02 < 8.04E-02 L310218CSGSSSA026 11/12/2011 Soil 2.15E-01 8.35E-02 < 4.61E-02 < 2.67E-02 < 2.08E-02 < 2.33E-02 < 7.73E-02 L310218CSGSSBA026 11/12/2011 Soil 2.70E-01 8.02E-02 < 3.48E-02 < 3.43E-02 < 2.17E-02 < 2.71E-02 < 8.87E-02 L310218CSGSSSA027 11/12/2011 Soil 2.05E-01 7.16E-02 < 5.69E-02 < 5.19E-02 < 3.00E-02 < 3.12E-02 < 8.71E-02 L310218CSGSSBA027 11/12/2011 Soil 3.36E-01 8.02E-02 < 6.01E-02 < 3.40E-02 < 2.39E-02 < 3.06E-02 < 1.25E-01 L310218CSGSSSA028 11/12/2011 Soil 2.94E-01 9.15E-02 < 5.86E-02 < 5.75E-02 < 3.78E-02 < 3.63E-02 < 1.49E-01 L310218CSGSSBA028 11/12/2011 Soil 2.61E-01 5.29E-02 < 4.47E-02 < 3.05E-02 < 1.89E-02 < 2.59E-02 < 8.37E-02 L310218CSPAAVA029 11/16/2011 Asphalt < 1.82E-01 < 5.08E-02 < 4.42E-02 < 3.63E-02 < 3.38E-02 < 1.27E-01 L310218CSGSSSA029 11/16/2011 Soil 2.90E-01 5.94E-02 < 4.43E-02 < 2.93E-02 < 2.02E-02 1.22E-02 1.24E-02 < 7.81E-02 L310218CSGSSBA029 11/16/2011 Soil 2.83E-01 8.65E-02 < 6.58E-02 < 4.62E-02 < 5.69E-02 < 3.64E-02 < 1.13E-01 L310218CSGSSSA030 11/15/2011 Soil 1.35E-01 6.32E-02 < 5.31E-02 < 2.96E-02 < 1.95E-02 2.18E-02 1.74E-02 < 7.02E-02 L310218CSGSSBA030 11/15/2011 Soil 3.87E-01 1.36E-01 < 9.68E-02 < 6.81E-02 < 6.49E-02 < 6.62E-02 < 2.29E-01 4/12/2012 Collection Sam ple 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s Sam ple ID Date Media Eu-155 Error I-129 Error K-40 Error Pb-214 Error Tl-208 Error U-235 Error L310218CSGSSSA021 11/12/2011 Soil < 6.66E-02 < 5.13E-02 8.91E+00 1.12E+00 3.65E-01 4.75E-02 2.85E-01 5.34E-02 < 1.45E-01 L310218CSGSSBA021 11/12/2011 Soil < 4.72E-02 < 6.72E-02 8.63E+00 1.09E+00 2.65E-01 5.00E-02 1.94E-01 5.20E-02 < 1.37E-01 L310218CDGSSBA021 11/12/2011 Soil < 7.58E-02 < 6.85E-02 9.82E+00 1.38E+00 2.61E-01 5.79E-02 3.98E-01 1.26E-01 < 1.68E-01 L310218CSGSSSA022 11/12/2011 Soil < 8.13E-02 < 7.23E-02 9.25E+00 1.24E+00 2.97E-01 5.96E-02 2.87E-01 6.81E-02 < 1.88E-01 L310218CDGSSSA022 11/12/2011 Soil < 7.35E-02 < 9.37E-02 8.95E+00 1.24E+00 3.71E-01 6.47E-02 2.84E-01 7.15E-02 < 1.90E-01 L310218CSGSSBA022 11/12/2011 Soil < 9.80E-02 < 8.73E-02 1.03E+01 1.50E+00 5.46E-01 1.13E-01 2.82E-01 9.56E-02 < 2.29E-01 L310218CSGSSSA023 11/12/2011 Soil < 6.77E-02 < 6.88E-02 9.25E+00 1.13E+00 4.49E-01 6.14E-02 3.05E-01 5.90E-02 < 1.45E-01 L310218CSGSSBA023 11/12/2011 Soil < 6.25E-02 < 5.09E-02 7.99E+00 1.03E+00 2.60E-01 4.12E-02 2.19E-01 4.53E-02 < 1.40E-01 L310218CSGSSSA024 11/12/2011 Soil < 6.34E-02 < 9.95E-02 6.95E+00 9.34E-01 2.75E-01 5.83E-02 1.64E-01 4.87E-02 < 1.37E-01 L310218CSGSSBA024 11/12/2011 Soil < 4.99E-02 < 3.94E-02 5.30E+00 6.97E-01 2.05E-01 2.90E-02 1.91E-01 3.62E-02 < 1.09E-01 L310218CSGSSSA025 11/12/2011 Soil < 4.73E-02 < 5.97E-02 4.63E+00 6.78E-01 9.80E-02 3.42E-02 1.57E-01 3.92E-02 < 1.06E-01 L310218CSGSSBA025 11/12/2011 Soil < 5.26E-02 , 5.64E-02 7.68E+00 9.04E-01 2.81E-01 3.94E-02 2.08E-01 4.43E-02 < 1.21E-01 L310218CSGSSSA026 11/12/2011 Soil < 5.06E-02 < 5.57E-02 5.43E+00 7.31E-01 1.78E-01 3.62E-02 1.81E-01 4.22E-02 < 1.12E-01 L310218CSGSSBA026 11/12/2011 Soil < 6.99E-02 < 5.64E-02 8.99E+00 1.14E+00 3.60E-01 6.08E-02 2.56E-02 5.67E-02 < 1.62E-01 L310218CSGSSSA027 11/12/2011 Soil < 5.75E-02 < 6.49E-02 6.91E+00 8.67E-01 1.93E-01 4.31E-02 1.72E-01 4.99E-02 < 1.41E-01 L310218CSGSSBA027 11/12/2011 Soil < 7.32E-02 < 6.67E-02 9.52E+00 1.16E+00 4.36E-01 5.79E-02 3.19E-02 5.98E-02 < 1.54E-01 L310218CSGSSSA028 11/12/2011 Soil < 6.83E-02 < 6.23E-02 6.37E+00 1.04E+00 1.20E-01 4.86E-02 1.86E-01 5.76E-02 < 1.62E-01 L310218CSGSSBA028 11/12/2011 Soil < 5.30E-02 < 5.15E-02 1.05E+01 1.16E+00 2.50E-01 4.19E-02 2.26E-01 4.94E-02 < 1.29E-01 L310218CSPAAVA029 11/16/2011 Asphalt < 5.79E-02 < 5.13E-02 3.87E+00 7.15E-01 1.42E-01 3.87E-02 1.30E-01 4.78E-02 < 1.25E-01 L310218CSGSSSA029 11/16/2011 Soil < 5.64E-02 < 5.76E-02 6.43E+00 7.91E-01 2.40E-01 3.76E-02 2.27E-01 5.67E-02 < 1.23E-01 L310218CSGSSBA029 11/16/2011 Soil < 7.91E-02 < 7.73E-02 8.85E+00 1.18E+00 3.90E-01 6.94E-02 2.32E-01 5.63E-02 < 1.67E-01 L310218CSGSSSA030 11/15/2011 Soil < 5.36E-02 < 6.06E-02 5.00E+00 7.20E-02 1.50E-01 4.56E-02 1.57E-01 4.60E-02 < 1.21E-01 4

Attachment 1-2 10218A East Side of ISFSI Area Gam m a Spectroscopy Analysis Results (in pCi/g) 4/12/2012 Collection Sam ple 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s Sam ple ID Date Media Ac-228 Error Am -241 Error Co-60 Error Cs-134 Error Cs-137 Error Eu-154 Error L310218IIGSSSA001 11/21/2011 Soil 6.97E-01 1.01E-01 < 7.60E-02 < 4.38E-02 < 2.57E-02 1.16E-01 3.29E-02 < 1.07E-01 L310218IIGSSSA002 11/21/2011 Soil 7.70E-01 2.40E-01 < 1.03E-01 < 8.28E-02 < 6.02E-02 1.09E-01 6.44E-02 < 2.17E-01 L310218IIGSSBA003 11/21/2011 Soil 4.20E-01 1.39E-01 < 8.19E-02 < 7.02E-02 < 4.97E-02 < 5.59E-02 < 1.68E-01 4/12/2012 Collection Sam ple 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s Sam ple ID Date Media Eu-155 Error I-129 Error K-40 Error Pb-214 Error Tl-208 Error U-235 Error L310218IIGSSSA001 11/21/2011 Soil < 8.90E-02 < 7.06E-02 1.49E+01 1.78E+00 5.72E-01 6.56E-02 4.81E-01 < 1.90E-01 L310218IIGSSSA002 11/21/2011 Soil < 1.25E-01 < 1.07E-01 1.50E+01 2.12E+00 5.94E-01 1.00E-01 4.84E-01 < 2.91E-01 L310218IIGSSBA003 11/21/2011 Soil < 9.27E-02 < 8.30E-02 1.07E+01 1.54E+00 4.13E-01 8.07E-02 3.24E-01 1.35E-01 < 2.28E-01 5

Attachment 1-3 SU10218A East Side of ISFSI Duplicate Soil Samples

Attachment 1-3 10218A East Side of ISFSI Duplicate Comparison (in pCi/g) 4/17/2012 Duplicates: Ac-228 UNC Cs-137 UNC K-40 UNC Pb-214 UNC Tl-208 UNC L310218CSGSSS-A003 3.60E-01 7.81E-02 < 3.70E-02 9.54E+00 1.17E+00 3.51E-01 5.77E-02 3.37E-01 8.59E-02 L310218CDGSSS-A003 3.09E-01 8.69E-02 4.64E-02 2.28E-02 8.19E+00 1.09E+00 2.90E-01 4.65E-02 1.93E-01 8.40E-02 e/Uncertianty 4.61E+00 N/A 8.15E+00 6.08E+00 3.92E+00 Resolution 4-7 8-15 4-7 <4 tance Criteria 0.5-2.5 0.6-1.66 0.5-2.0 0.4-2.5 mple/Duplicate 1.17E+00 Pass 1.16E+00 Pass 1.21E+00 Pass 1.75E+00 Pass L310218CSGSSB-A019 3.65E-01 7.35E-02 < 3.71E-02 9.99E+00 1.27E+00 3.79E-01 5.78E-02 3.29E-01 7.07E-02 L310218CDGSSB-A019 3.59E-01 8.82E-02 < 3.40E-02 9.79E+00 1.28E+00 3.65E-01 7.24E-02 2.54E-01 5.80E-02 e/Uncertianty 4.97E+00 N/A 7.87E+00 6.56E+00 4.65E+00 Resolution 4-7 8-15 4-7 4-7 tance Criteria 0.5-2.5 0.6-1.66 0.5-2.0 0.5-2.0 mple/Duplicate 1.02E+00 Pass 1.02E+00 Pass 1.04E+00 Pass 1.30E+00 Pass L310218CSGSSB-A021 1.96E-01 9.15E-02 < 2.97E-02 8.63E+00 1.09E+00 2.65E-01 5.00E-02 1.94E-01 5.20E-02 L310218CDGSSB-A021 2.67E-01 1.03E-01 < 4.59E-02 9.82E+00 1.38E+00 2.61E-01 5.79E-02 3.98E-01 1.26E-01 e/Uncertianty 2.14E+00 N/A 7.92E+00 5.30E+00 3.73E+00 Resolution <4 8-15 4-7 <4 tance Criteria 0.4-2.5 0.6-1.66 0.5-2.0 0.4-2.5 mple/Duplicate 7.34E-01 Pass 8.79E-01 Pass 1.02E+00 Pass 4.87E-01 Pass L310218CSGSSS-A022 3.19E-01 1.37E-01 < 4.59E-02 9.25E+00 1.24E+00 2.97E-01 5.96E-02 2.87E-01 6.81E-02 L310218CDGSSS-A022 2.82E-01 1.48E-01 2.02E-02 2.09E-02 8.95E+00 1.24E+00 3.71E-01 6.47E-02 2.84E-01 7.15E-02 e/Uncertianty 2.33E+00 N/A 7.46E+00 4.98E+00 4.21E+00 Resolution <4 A cceptance Criteria 8-15 4-7 4-7 Acceptance Resolution tance Criteria 0.4-2.5 Criteria 0.6-1.66 0.5-2.0 0.5-2.0 mple/Duplicate 1.13E+00 Pass <4 0.40-2.50 1.03E+00 Pass 8.01E-01 Pass 1.01E+00 Pass 4-7 0.5-2.00 8-15 0.60-1.66 16-50 0.75-1.33 51-200 0.80-1.25

>200 0.85-1.18 2

Attachment 1-4 SU10218A East Side of ISFSI Hard-To-Detect Radionuclide Analysis Results

Attachment 1-4 10218A East Side of ISFSI Hard To Detect Radionuclide Analysis Results (in pCi/g) 4/17/2012 Collection Sam ple Sam ple ID Date Media Fe-55 Uncertianty Ni-63* Uncertianty Sr-90* Uncertianty 0218CSGSSSA11/14/2011 Soil < 2.37E-01 4.21E-01 1.60E-01 2.83E-01 6.71E-02 0218CSGSSBA11/14/2011 Soil < 2.32E-01 5.97E-01 1.55E-01 < 1.36E-01 0218CSGSSSA11/14/2011 Soil < 2.69E-01 4.19E-01 1.59E-01 1.98E-01 7.87E-02 0218CSGSSBA11/14/2011 Soil < 2.43E-01 3.29E-01 1.64E-01 1.76E-01 6.76E-02 0218CSGSSSA11/12/2011 Soil < 2.30E-01 2.95E+00 2.25E-01 1.88E-01 8.36E-02 0218CSGSSBA11/12/2011 Soil < 2.47E-01 < 2.35E-01 < 1.50E-01 218CSPAAVA11/16/2011 Asphalt < 2.49E-01 4.83E-01 1.49E-01 < 1.48E-01 0218CSGSSSA11/16/2011 Soil < 2.49E-01 7.37E-01 1.92E-01 < 1.68E-01 0218CSGSSBA11/16/2011 Soil < 2.17E-01 8.34E-01 2.57E-01 < 1.21E-01 0218IIGSSSA 11/21/2011 Soil < 2.72E-01 7.39E-01 1.67E-01 3.02E-01 7.42E-02 0218IIGSSSA 11/21/2011 Soil < 2.99E-01 1.21E+00 2.73E-01 3.87E-01 9.30E-02 0218IIGSSBA 11/21/2011 Soil < 2.15E-01 3.09E-01 1.54E-01 < 1.34E-01 As per communications w ith the vendor laboratory the positive results noted for Ni-63 and Sr-90 are due to method noise (noise level equivalent and are therefore false positives.

2

Attachment 1-5 SU10218B West Side of ISFSI Gamma Spectroscopy Analysis 3

Attachment 1-5 10218B West Side of ISFSI Area Gam m a Spectroscopy Analysis Results (in pCi/g) 3/26/2012 Collection Sam ple 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s Sam ple ID Date Media Ac-228 Error Am -241 Error Co-60 Error Cs-134 Error Cs-137 Error Eu-154 Error L310218CSGSSSB001 11/17/2011 Soil 3.78E-01 7.96E-02 < 6.87E-02 < 4.44E-02 < 2.68E-02 < 4.19E-02 < 1.18E-01 L310218CSGSSBB001 11/17/2011 Soil < 2.60E-01 < 8.08E-02 < 5.77E-02 < 5.14E-02 6.95E-02 4.59E-02 < 1.69E-01 L310218CSGSSSB002 11/17/2011 Soil 3.82E-01 1.23E-01 < 5.57E-02 < 3.90E-02 < 2.56E-02 9.08E-02 3.57E-02 < 9.56E-02 L310218CDGSSSB002 11/17/2011 Soil 3.25E-01 8.64E-02 < 6.51E-02 < 3.97E-02 < 2.35E-02 7.13E-02 2.52E-02 < 1.09E-01 L310218CSGSSBB002 11/17/2011 Soil 5.11E-01 1.45E-01 < 9.27E-02 < 7.66E-02 < 5.73E-02 < 5.97E-02 < 2.06E-01 L310218CSGSSSB003 11/17/2011 Soil 2.25E-01 7.70E-02 < 5.50E-02 < 3.67E-02 < 2.56E-02 3.07E-01 4.94E-02 < 8.74E-02 L310218CSGSSBB003 11/17/2011 Soil 2.16E-01 6.79E-02 < 4.79E-02 < 2.59E-02 < 1.93E-02 < 2.69E-02 < 7.18E-02 L310218CSGSSSB004 11/17/2011 Soil 2.48E-01 6.49E-02 < 5.58E-02 < 3.32E-02 < 2.22E-02 1.17E-01 2.97E-02 < 9.38E-02 L310218CSGSSBB004 11/17/2011 Soil 3.32E-01 1.63E-01 < 7.32E-02 < 6.59E-02 < 4.55E-02 7.37E-02 4.57E-02 < 1.72E-01 L310218CSGSSSB005 11/17/2011 Soil 4.37E-01 8.51E-02 < 5.90E-02 < 3.96E-02 < 2.67E-02 < 3.47E-02 < 1.14E-01 L310218CSGSSBB005 11/17/2011 Soil 4.09E-01 1.26E-01 < 6.63E-02 < 4.60E-02 < 2.65E-02 < 3.48E-02 < 1.00E-01 L310218CSGSSSB006 11/17/2011 Soil 1.92E-01 1.11E-01 < 6.63E-02 < 4.35E-02 < 2.77E-02 5.27E-02 3.48E-02 < 1.16E-01 L310218CSGSSBB006 11/17/2011 Soil 3.94E-01 7.92E-02 < 6.29E-02 < 3.40E-02 < 2.34E-02 < 2.81E-02 < 1.02E-01 L310218CSGSSSB007 11/17/2011 Soil 2.44E-01 9.38E-02 < 6.21E-02 < 4.45E-02 < 2.86E-02 8.19E-02 3.11E-02 < 9.65E-02 L310218CSGSSBB007 11/17/2011 Soil 1.51E-01 6.76E-02 < 4.59E-02 < 2.57E-02 < 1.78E-02 3.12E-02 1.92E-02 < 5.05E-02 L310218CSGSSSB008 11/17/2011 Soil 3.23E-01 1.76E-01 < 7.26E-02 < 7.14E-02 < 4.40E-02 < 5.91E-02 < 1.72E-01 L310218CSGSSBB008 11/17/2011 Soil 2.70E-01 7.88E-02 < 4.94E-02 < 2.77E-02 < 2.25E-02 < 2.31E-02 < 7.70E-02 L310218CSGSSSB009 11/17/2011 Soil 3.25E-01 6.96E-02 < 7.45E-02 < 3.73E-02 < 2.27E-02 3.38E-02 2.46E-02 < 1.02E-01 L310218CSGSSBB009 11/17/2011 Soil 3.20E-01 5.90E-02 < 4.35E-02 < 2.87E-02 < 2.16E-02 6.54E-02 2.58E-02 < 7.64E-02 L310218CSGSSSB010 11/17/2011 Soil 2.09E-01 1.05E-01 < 6.31E-02 < 4.00E-02 < 2.79E-02 < 3.87E-02 < 1.10E-01 L310218CSGSSBB010 11/17/2011 Soil 3.15E-01 7.35E-02 < 5.28E-02 < 3.82E-02 < 2.10E-02 < 2.63E-02 < 8.98E-02 3/26/2012 Collection Sam ple 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s Sam ple ID Date Media Eu-155 Error I-129 Error K-40 Error Pb-214 Error Tl-208 Error U-235 Error L310218CSGSSSB001 11/17/2011 Soil < 7.77E-02 < 8.29E-02 9.49E+00 1.25E+00 2.98E-01 6.65E-02 3.03E-01 1.03E-01 < 1.75E-01 L310218CSGSSBB001 11/17/2011 Soil < 8.93E-02 < 8.69E-02 7.27E+00 1.20E+00 2.89E-01 8.48E-02 2.37E-01 7.99E-02 < 2.15E-01 L310218CSGSSSB002 11/17/2011 Soil < 7.10E-02 < 6.86E-02 9.76E+00 1.16E+00 4.46E-01 5.20E-02 3.28E-01 6.28E-02 < 1.58E-01 L310218CDGSSSB002 11/17/2011 Soil < 7.54E-02 < 6.58E-02 9.01E+00 1.18E+00 4.32E-01 5.55E-02 2.28E-01 5.92E-02 < 1.84E-01 L310218CSGSSBB002 11/17/2011 Soil < 1.07E-01 < 9.58E-02 1.26E+01 1.82E+00 5.73E-01 9.59E-02 2.89E-01 9.28E-02 < 2.64E-01 L310218CSGSSSB003 11/17/2011 Soil < 6.71E-02 < 7.35E-02 6.23E+00 8.31E-01 2.17E-01 4.36E-02 2.92E-01 6.30E-02 < 1.52E-01 L310218CSGSSBB003 11/17/2011 Soil < 5.69E-02 < 4.90E-02 6.55E+00 8.68E-01 2.20E-01 3.37E-02 2.04E-01 4.90E-02 < 1.28E-01 L310218CSGSSSB004 11/17/2011 Soil < 6.50E-02 < 6.99E-02 5.32E+00 7.76E-01 1.81E-01 4.55E-02 2.71E-01 8.19E-02 < 1.26E-01 L310218CSGSSBB004 11/17/2011 Soil < 8.43E-02 < 8.15E-02 7.66E+00 1.23E+00 2.35E-01 6.98E-02 < 1.69E-01 < 2.02E-01 L310218CSGSSSB005 11/17/2011 Soil < 7.48E-02 < 7.44E-02 1.29E+01 1.47E+00 4.76E-01 5.56E-02 3.88E-01 7.01E-02 < 1.71E-01 L310218CSGSSBB005 11/17/2011 Soil < 7.41E-02 < 7.61E-02 8.27E+00 1.11E+00 3.91E-01 5.38E-02 2.73E-01 1.00E-01 < 1.59E-01 L310218CSGSSSB006 11/17/2011 Soil < 7.20E-02 < 7.72E-02 8.69E+00 1.14E+00 3.29E-01 6.16E-02 2.23E-01 6.10E-02 < 1.52E-01 L310218CSGSSBB006 11/17/2011 Soil < 7.53E-02 < 6.35E-02 1.10E+01 1.36E+00 4.74E-01 5.63E-02 3.36E-01 6.00E-02 < 1.62E-01 L310218CSGSSSB007 11/17/2011 Soil < 7.34E-02 < 8.40E-02 4.94E+00 7.91E-01 1.56E-01 5.28E-02 1.25E-01 5.11E-02 < 1.51E-01 L310218CSGSSBB007 11/17/2011 Soil < 5.34E-02 < 4.87E-02 5.17E+00 7.16E-02 1.56E-01 3.44E-02 2.24E-01 4.44E-02 < 1.25E-01 L310218CSGSSSB008 11/17/2011 Soil < 8.59E-02 < 8.00E-02 6.20E+00 1.11E+00 2.11E-01 6.74E-02 1.90E-01 9.13E-02 < 2.00E-01 L310218CSGSSBB008 11/17/2011 Soil < 6.06E-02 < 5.27E-02 5.73E+00 7.85E-02 2.21E-01 3.96E-02 2.27E-01 5.17E-02 < 1.42E-01 L310218CSGSSSB009 11/17/2011 Soil < 7.42E-02 < 9.03E-02 9.53E+00 1.21E+00 3.00E-01 4.29E-02 3.02E-01 5.33E-02 < 1.67E-01 L310218CSGSSBB009 11/17/2011 Soil < 5.39E-02 < 6.00E-02 6.88E+00 8.44E-01 2.65E-01 3.67E-02 2.59E-01 6.11E-02 < 1.25E-01 L310218CSGSSSB010 11/17/2011 Soil < 6.79E-02 < 8.76E-02 8.50E+00 1.12E+00 3.01E-01 4.60E-02 2.36E-01 6.68E-02 < 1.50E-01 L310218CSGSSBB010 11/17/2011 Soil < 6.75E-02 < 6.92E-02 8.97E+00 1.07E+00 4.35E-01 6.21E-02 3.38E-01 5.40E-02 < 1.56E-01

Attachment 1-5 10218B West Side of ISFSI Area Gam m a Spectroscopy Analysis Results (in pCi/g) 3/26/2012 Collection Sam ple 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s Sam ple ID Date Media Ac-228 Error Am -241 Error Co-60 Error Cs-134 Error Cs-137 Error Eu-154 Error L310218CSGSSSB011 11/17/2011 Soil 3.38E-01 1.38E-01 < 8.08E-02 < 7.22E-02 < 5.22E-02 7.72E-02 5.29E-02 < 1.67E-01 L310218CSGSSBB011 11/17/2011 Soil 4.31E-01 1.12E-01 < 8.43E-02 < 5.14E-02 < 3.44E-02 < 3.71E-02 < 1.37E-01 L310218CDGSSSB011 11/17/2011 Soil 4.26E-01 1.01E-01 < 6.92E-02 < 4.46E-02 < 2.89E-02 < 3.40E-02 < 1.10E-01 L310218CSGSSSB012 11/17/2011 Soil 2.96E-01 6.61E-02 < 4.50E-02 < 3.05E-02 < 2.14E-02 < 2.54E-02 < 7.32E-02 L310218CSGSSSB012 11/17/2011 Soil 2.58E-01 8.86E-02 < 6.13E-02 < 5.46E-02 < 3.95E-02 < 3.75E-02 < 1.26E-01 L310218CSGSSSB013 11/17/2011 Soil 3.64E-01 1.08E-01 < 6.32E-02 < 3.90E-02 < 2.70E-02 5.17E-02 2.46E-02 < 9.85E-02 L310218CSGSSBB013 11/17/2011 Soil 2.43E-01 6.45E-02 < 4.71E-02 < 3.13E-02 < 1.90E-02 < 2.76E-02 < 8.50E-02 L310218CSGSSSB014 11/17/2011 Soil 3.37E-01 1.32E-01 < 8.08E-02 < 7.58E-02 < 5.32E-02 < 7.74E-02 < 2.11E-01 L310218CSGSSBB014 11/17/2011 Soil 3.20E-01 6.98E-02 < 4.60E-02 < 3.25E-02 < 2.27E-02 6.28E-02 2.22E-02 < 7.52E-02 L310218CSGSSSB015 11/17/2011 Soil 3.35E-01 1.31E-01 < 7.42E-02 < 6.43E-02 < 4.71E-02 < 5.20E-02 < 1.68E-01 L310218CSGSSBB015 11/17/2011 Soil 2.52E-01 7.05E-02 < 5.33E-02 < 3.49E-02 < 2.38E-02 < 3.10E-02 < 8.00E-02 L310218CSGSSSB016 11/17/2011 Soil 1.87E-01 2.14E-01 < 8.53E-02 < 6.85E-02 < 5.93E-02 7.00E-02 4.69E-02 < 1.74E-01 L310218CSGSSBB016 11/17/2011 Soil 3.04E-01 7.23E-02 < 4.31E-02 < 3.03E-02 < 2.06E-02 < 3.20E-02 < 6.64E-02 L310218CSGSSSB017 11/17/2011 Soil 2.28E-01 7.07E-02 < 6.05E-02 < 3.93E-02 < 2.32E-02 8.41E-02 2.64E-02 < 8.67E-02 L310218CSGSSBB017 11/17/2011 Soil 4.11E-01 1.11E-01 < 7.32E-02 < 4.79E-02 < 3.61E-02 < 4.25E-02 < 1.22E-01 L310218CSGSSSB018 11/17/2011 Soil 2.32E-01 1.33E-01 < 6.75E-02 < 5.66E-02 < 4.53E-02 < 5.05E-02 < 1.44E-01 L310218CSGSSBB018 11/17/2011 Soil 2.81E-01 6.19E-02 < 4.79E-02 < 3.03E-02 < 2.12E-02 2.98E-02 2.68E-02 < 7.03E-02 L310218CSGSSSB019 11/17/2011 Soil 1.44E-01 1.38E-01 < 7.59E-02 < 6.86E-02 < 5.60E-02 5.19E-02 5.13E-02 < 2.13E-01 L310218CSGSSBB019 11/17/2011 Soil 3.31E-01 9.72E-02 < 8.40E-02 < 4.48E-02 < 3.20E-02 < 3.81E-02 < 1.14E-01 L310218CSGSSSB020 11/17/2011 Soil < 1.93E-01 < 6.35E-02 < 2.50E-02 < 2.60E-02 4.10E-02 2.60E-02 < 1.13E-01 L310218CSGSSBB020 11/17/2011 Soil < 2.58E-01 < 7.81E-02 < 5.80E-02 < 4.66E-02 < 5.30E-02 < 1.73E-01 3/26/2012 Collection Sam ple 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s Sam ple ID Date Media Eu-155 Error I-129 Error K-40 Error Pb-214 Error Tl-208 Error U-235 Error L310218CSGSSSB011 11/17/2011 Soil < 9.46E-02 < 8.33E-02 8.01E+00 1.30E+00 3.09E-01 7.76E-02 2.39E-01 8.14E-02 < 2.34E-01 L310218CSGSSBB011 11/17/2011 Soil < 9.30E-02 < 9.70E-02 8.57E+00 1.22E+00 4.30E-01 7.29E-02 2.90E-01 7.36E-02 < 1.90E-01 L310218CDGSSSB011 11/17/2011 Soil < 8.23E-02 < 7.14E-02 9.65E+00 1.28E+00 4.61E-01 6.48E-02 3.78E-01 7.02E-02 < 1.92E-01 L310218CSGSSSB012 11/17/2011 Soil < 5.71E-02 < 6.14E-02 6.30E+00 8.01E-01 2.92E-01 3.93E-02 2.35E-01 7.29E-02 < 1.44E-01 L310218CSGSSSB012 11/17/2011 Soil < 7.17E-02 < 6.60E-02 5.48E+00 9.58E-01 2.00E-01 5.67E-02 2.22E-01 7.29E-02 < 1.80E-01 L310218CSGSSSB013 11/17/2011 Soil < 8.04E-02 < 7.04E-02 5.68E+00 8.33E-01 3.41E-01 5.43E-02 2.38E-01 6.24E-02 < 1.68E-01 L310218CSGSSBB013 11/17/2011 Soil < 5.74E-02 < 5.90E-02 5.72E+00 7.38E-01 2.84E-01 4.24E-02 2.48E-01 5.19E-02 < 1.32E-01 L310218CSGSSSB014 11/17/2011 Soil < 1.00E-01 < 8.95E-02 6.98E+00 1.36E+00 3.29E-01 9.16E-02 2.21E-01 8.89E-02 < 2.37E-01 L310218CSGSSBB014 11/17/2011 Soil < 5.88E-02 < 6.34E-02 5.68E+00 7.38E-01 2.79E-01 4.20E-02 2.57E-01 5.10E-02 < 1.36E-01 L310218CSGSSSB015 11/17/2011 Soil < 7.87E-02 < 8.09E-02 8.32E+00 1.29E+00 2.71E-01 7.23E-02 2.56E-01 7.41E-02 < 2.11E-01 L310218CSGSSBB015 11/17/2011 Soil < 6.78E-02 < 7.36E-02 5.69E+00 7.68E-01 2.97E-01 4.34E-02 2.29E-01 5.51E-02 < 1.53E-01 L310218CSGSSSB016 11/17/2011 Soil < 9.91E-02 < 1.91E-01 7.83E+00 1.36E+00 3.27E-01 8.34E-02 2.54E-01 9.49E-02 < 2.47E-01 L310218CSGSSBB016 11/17/2011 Soil < 5.86E-02 < 6.61E-02 5.86E+00 7.67E-01 2.58E-01 4.25E-02 2.61E-01 7.76E-02 < 1.43E-01 L310218CSGSSSB017 11/17/2011 Soil < 6.04E-02 < 6.36E-02 6.78E+00 9.46E-01 2.80E-01 4.86E-02 2.19E-01 5.50E-02 < 1.63E-01 L310218CSGSSBB017 11/17/2011 Soil < 9.01E-02 < 1.12E-01 5.75E+00 8.88E-01 3.32E-01 6.35E-02 1.98E-01 7.49E-02 < 2.15E-01 L310218CSGSSSB018 11/17/2011 Soil < 7.71E-02 < 7.86E-02 7.47E+00 1.22E+00 2.22E-01 5.51E-02 3.48E-01 1.10E-01 < 1.98E-01 L310218CSGSSBB018 11/17/2011 Soil < 5.97E-02 < 6.62E-02 7.36E+00 9.03E-01 3.68E-01 4.89E-02 3.30E-01 7.70E-02 < 1.43E-01 L310218CSGSSSB019 11/17/2011 Soil < 9.09E-02 < 9.12E-02 5.32E+00 1.05E+00 1.71E-01 8.94E-02 2.26E-01 9.46E-02 < 2.24E-01 L310218CSGSSBB019 11/17/2011 Soil < 9.64E-02 < 9.05E-02 9.93E+00 1.34E+00 3.83E-01 6.67E-02 2.35E-01 7.17E-02 < 2.22E-01 L310218CSGSSSB020 11/17/2011 Soil < 7.80E-02 < 8.61E-02 6.10E+00 9.33E-01 2.47E-01 5.50E-02 1.73E-01 4.96E-02 < 1.68E-01 L310218CSGSSBB020 11/17/2011 Soil < 8.18E-02 < 7.74E-02 7.48E+00 1.18E+00 2.91E-01 5.74E-02 2.22E-01 7.56E-02 < 2.17E-01 5

Attachment 1-5 10218B West Side of ISFSI Area Gam m a Spectroscopy Analysis Results (in pCi/g) 3/26/2012 Collection Sam ple 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s Sam ple ID Date Media Ac-228 Error Am -241 Error Co-60 Error Cs-134 Error Cs-137 Error Eu-154 Error L310218CSGSSSB021 11/16/2011 Soil 3.00E-01 6.53E-02 < 4.99E-02 < 3.53E-02 < 2.41E-02 < 3.14E-02 < 7.87E-02 L310218CSGSSBB021 11/16/2011 Soil 3.28E-01 1.90E-01 < 6.92E-02 < 5.30E-02 < 4.71E-02 < 5.21E-02 < 1.30E-01 L310218CSGSSSB022 11/16/2011 Soil 1.85E-01 7.00E-02 < 5.00E-02 < 3.09E-01 < 2.18E-01 < 2.39E-02 < 8.12E-01 L310218CSGSSBB022 11/17/2011 Soil 3.07E-01 7.58E-02 < 5.31E-02 < 3.84E-02 < 2.26E-02 < 2.47E-02 < 9.88E-02 L310218CSGSSSB023 11/17/2011 Soil < 1.49E-01 < 5.04E-02 < 3.31E-02 < 1.79E-02 < 2.47E-02 < 8.95E-02 L310218CSGSSBB023 11/16/2011 Soil 3.29E-01 6.96E-02 < 4.70E-02 < 3.51E-02 < 2.12E-02 7.67E-02 2.58E-02 < 7.00E-02 L310218CSGSSSB024 11/16/2011 Soil 2.79E-01 7.92E-01 < 3.17E-02 < 2.74E-02 < 2.16E-02 2.97E-01 1.99E-01 < 7.63E-02 L310218CSGSSBB024 11/16/2011 Soil 3.01E-01 9.09E-02 < 6.88E-02 < 4.67E-02 < 2.85E-02 < 2.81E-02 < 9.99E-02 L310218CDGSSBB024 11/16/2011 Soil 3.13E-01 1.00E-01 < 6.80E-02 < 6.32E-02 < 4.26E-02 < 4.44E-02 < 1.56E-01 L310218CSGSSSB025 11/16/2011 Soil 2.89E-01 1.17E-01 < 5.48E-02 < 3.62E-02 < 2.20E-02 < 2.96E-02 < 9.00E-02 L310218CSGSSBB025 11/16/2011 Soil 2.36E-01 7.82E-02 < 5.54E-02 < 3.51E-02 < 2.25E-02 3.00E-02 2.50E-02 < 9.46E-02 L310218CSGSSSB026 11/16/2011 Soil 2.20E-01 6.39E-02 < 4.45E-02 < 3.30E-02 < 2.05E-02 < 2.17E-02 < 7.43E-02 L310218CSGSSBB026 11/16/2011 Soil 3.46E-01 1.18E-01 < 6.26E-02 < 3.70E-02 < 2.28E-02 < 2.78E-02 < 8.77E-02 L310218CSGSSSB027 11/17/2011 Soil 2.05E-01 7.16E-02 < 5.69E-02 < 5.19E-02 < 3.00E-02 < 3.12E-02 < 8.12E-02 L310218CSGSSBB027 11/17/2011 Soil 2.72E-01 6.75E-02 < 5.39E-02 < 2.87E-02 < 1.96E-02 3.39E-02 2.62E-02 < 6.67E-02 L310218CSGSSSB028 11/16/2011 Soil < 1.51E-01 < 5.29E-02 < 4.25E-02 < 3.44E-02 4.65E-02 3.13E-02 < 9.39E-02 L310218CSGSSBB028 11/16/2011 Soil 3.75E-01 1.07E-01 < 8.04E-02 < 6.61E-02 < 5.10E-02 < 5.97E-02 < 1.74E-01 L310218CSGSSSB029 11/16/2011 Soil 2.08E-01 7.75E-02 < 5.86E-02 < 4.49E-02 < 2.68E-02 2.91E-02 2.39E-02 < 1.09E-01 L310218CSGSSBB029 11/16/2011 Soil 2.85E-01 6.15E-02 < 0.0396 < 3.07E-02 < 1.89E-02 < 2.06E-02 < 7.56E-02 L310218CSPAAVB030 11/16/2011 Asphalt 2.04E-01 6.69E-02 < 5.50E-02 < 3.69E-02 < 2.58E-02 < 2.31E-02 < 8.73E-02 L310218CDPAAVB030 11/16/2011 Asphalt < 1.31E-01 < 4.57E-02 < 3.69E-02 < 2.48E-02 < 2.57E-02 < 8.99E-02 L310218CSGSSSB030 11/16/2011 Soil 3.45E-01 1.10E-01 < 6.61E-02 < 4.29E-02 < 2.99E-02 < 4.00E-02 < 1.26E-01 L310218CDGSSSB030 11/16/2011 Soil 3.13E-01 7.74E-02 < 5.52E-02 < 3.72E-02 < 2.39E-02 < 3.14E-02 < 1.02E-01 L310218CSGSSBB030 11/16/2011 Soil 3.79E-01 8.98E-02 < 6.87E-02 < 4.24E-02 < 2.67E-02 < 3.05E-02 < 9.91E-02 3/26/2012 Collection Sam ple 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s Sam ple ID Date Media Ac-228 Error Am -241 Error Co-60 Error Cs-134 Error Cs-137 Error Eu-154 Error L310218CSGSSSB021 11/16/2011 Soil < 6.26E-02 < 6.34E-02 9.17E+00 1.07E+00 3.69E-01 4.67E-02 2.66E-01 4.95E-02 < 1.48E-01 L310218CSGSSBB021 11/16/2011 Soil < 7.97E-02 < 7.35E-02 5.13E+00 9.66E-01 2.71E-01 7.16E-02 2.58E-01 7.90E-01 <. 2.01E-01 L310218CSGSSSB022 11/16/2011 Soil < 5.69E-02 < 5.30E-02 5.94E+00 8.19E-01 1.37E-01 3.15E-02 2.52E-01 5.15E-02 < 1.31E-01 L310218CSGSSBB022 11/17/2011 Soil < 6.93E-02 < 6.90E-02 9.59E+00 1.13E+00 3.95E-01 5.91E-02 2.94E-01 7.72E-02 < 1.65E-01 L310218CSGSSSB023 11/17/2011 Soil < 5.32E-02 < 6.55E-02 6.14E+00 8.16E-01 1.73E-01 4.32E-02 1.77E-01 4.65E-02 < 1.19E-01 L310218CSGSSBB023 11/16/2011 Soil < 5.82E-02 < 6.34E-02 6.97E+00 8.58E-01 2.57E-01 4.30E-02 2.37E-01 5.34E-02 < 1.38E-01 L310218CSGSSSB024 11/16/2011 Soil < 6.23E-02 < 5.23E-02 6.45E+00 8.75E-01 2.29E-01 3.87E-02 2.35E-01 5.02E-02 < 1.33E-01 L310218CSGSSBB024 11/16/2011 Soil < 7.61E-02 < 7.87E-02 5.71E+00 8.45E-01 2.17E-01 5.52E-02 2.23E-01 5.77E-02 < 1.50E-01 L310218CDGSSBB024 11/16/2011 Soil < 8.19E-02 < 7.75E-02 6.62E+00 1.11E+00 1.74E-01 6.38E-02 2.11E-01 8.28E-02 < 1.91E-01 L310218CSGSSSB025 11/16/2011 Soil < 6.62E-02 < 7.52E-02 5.04E+00 7.70E-01 2.24E-01 4.82E-02 < 1.34E-01 < 1.41E-01 L310218CSGSSBB025 11/16/2011 Soil < 6.34E-02 < 6.29E-02 7.27E+00 9.60E-01 2.26E-01 4.96E-02 2.20E-01 5.31E-02 < 1.32E-01 L310218CSGSSSB026 11/16/2011 Soil < 5.06E-02 < 5.57E-02 5.43E+00 7.31E-01 1.78E-01 3.62E-02 1.81E-01 4.22E-02 < 1.12E-01 L310218CSGSSBB026 11/16/2011 Soil < 5.65E-02 < 6.31E-02 9.56E+00 1.22E+00 3.96E-01 5.88E-02 3.01E-02 5.08E-02 < 1.60E-01 L310218CSGSSSB027 11/17/2011 Soil < 6.84E-02 < 8.42E-02 5.27E+00 8.45E-01 1.78E-01 5.60E-02 1.56E-01 5.45E-02 < 1.45E-01 L310218CSGSSBB027 11/17/2011 Soil < 6.52E-02 < 5.12E-02 9.08E+00 1.13E+00 3.30E-01 4.80E-02 2.40E-01 5.48E-02 < 1.43E-01 L310218CSGSSSB028 11/16/2011 Soil < 6.05E-02 < 5.58E-02 2.73E+00 5.74E-01 1.80E-01 5.00E-02 8.35E-02 5.52E-02 < 1.52E-01 L310218CSGSSBB028 11/16/2011 Soil < 9.02E-02 < 8.65E-02 8.36E+00 1.34E+00 3.56E-01 7.10E-02 2.92E-01 9.93E-02 < 2.29E-01 L310218CSGSSSB029 11/16/2011 Soil < 6.41E-02 < 7.35E-02 6.07E+00 8.49E-01 2.47E-01 4.75E-02 2.08E-01 4.78E-02 < 1.43E-01 L310218CSGSSBB029 11/16/2011 Soil < 5.15E-02 < 5.15E-02 6.80E+00 8.09E-01 2.25E-01 3.60E-02 2.55E-01 4.49E-02 < 1.28E-01 L310218CSPAAVB030 11/16/2011 Asphalt < 6.43E-02 < 7.54E-02 3.67E+00 6.33E-01 1.15E-01 4.58E-02 1.24E-01 4.78E-02 < 1.25E-01 L310218CDPAAVB030 11/16/2011 Asphalt < 5.45E-02 < 7.46E-02 3.74E+00 5.72E-01 1.46E-01 4.02E-02 1.26E-01 4.88E-02 < 1.39E-01 L310218CSGSSSB030 11/16/2011 Soil < 7.42E-02 < 7.99E-02 6.94E+00 9.84E-01 2.77E-01 5.89E-02 2.46E-01 6.61E-02 < 1.58E-01 L310218CDGSSSB030 11/16/2011 Soil < 6.85E-02 < 7.90E-02 7.59E+00 9.84E-01 2.73E-01 5.14E-02 2.24E-01 5.89E-02 < 1.61E-01 L310218CSGSSBB030 11/16/2011 Soil < 7.28E-02 < 7.50E-02 9.83E+00 1.24E+00 4.49E-01 6.25E-02 3.33E-01 6.62E-02 < 1.65E-01 6

Attachment 1-6 SU10218B West Side of ISFSI Duplicate Soil Samples

Attachment 1-6 10218B West Side of ISFSI Duplicate Com parison (in pCi/g) 3/27/2012 Duplicates: Ac-228 Uncertianty Cs-137 Uncertianty K-40 Uncertianty Pb-214 Uncertianty Tl-208 Uncertianty L310218CSGSSS-B002 3.82E-01 1.23E-01 9.08E-02 3.57E-02 9.76E+00 1.16E+00 4.46E-01 5.20E-02 3.28E-01 6.28E-02 L310218CDGSSS-B002 3.25E-01 8.64E-02 7.13E-02 2.52E-02 9.01E+00 1.18E+00 4.32E-01 5.55E-02 2.28E-01 5.92E-02 e/Uncertianty 3.11E+00 2.54E+00 8.41E+00 8.58E+00 5.22E+00 Resolution <4 <4 8-15 8-15 4-7 tance Criteria 0.4-2.5 0.4-2.5 0.6-1.66 0.6-1.66 0.5-2.0 mple/Duplicate 1.18E+00 Pass 1.27E+00 Pass 1.08E+00 Pass 1.03E+00 Pass 1.44E+00 Pass L310218CSGSSB-B011 4.31E-01 1.12E-01 < 3.71E-02 8.57E+00 1.22E+00 4.30E-01 7.29E-02 2.90E-01 7.36E-02 L310218CDGSSB-B011 4.26E-01 1.01E-01 < 3.40E-02 9.65E+00 1.28E+00 4.61E-01 6.48E-02 3.78E-01 7.02E-02 e/Uncertianty 3.85E+00 N/A 7.02E+00 5.90E+00 3.94E+00 Resolution <4 4-7 4-7 <4 tance Criteria 0.4-2.5 0.5-2.0 0.5-2.0 0.4-2.5 mple/Duplicate 1.01E+00 Pass 8.88E-01 Pass 9.33E-01 Pass 7.67E-01 Pass L310218CSGSSB-B024 3.01E-01 9.09E-02 < 2.81E-02 5.71E+00 8.45E-01 2.17E-01 5.52E-02 2.23E-01 5.77E-02 L310218CDGSSB-B024 3.13E-01 1.00E-01 < 4.44E-02 6.62E+00 1.11E+00 1.74E-01 6.38E-02 2.11E-01 8.28E-02 e/Uncertianty 3.31E+00 N/A 6.76E+00 3.93E+00 3.86E+00 Resolution <4 4-7 <4 <4 tance Criteria 0.4-2.5 0.5-2.0 0.4-2.5 0.4-2.5 mple/Duplicate 9.62E-01 Pass 8.63E-01 Pass 1.25E+00 Pass 1.06E+00 Pass L310218CSPAAV-B030 2.04E-01 6.69E-02 < 2.31E-02 3.67E+00 6.33E-01 1.15E-01 4.58E-02 1.24E-01 4.78E-02 L310218CDP < 1.31E-01 < 2.57E-02 3.74E+00 5.72E-01 1.46E-01 4.02E-02 1.26E-01 4.88E-02 e/Uncertianty 3.05E+00 N/A 5.80E+00 2.51E+00 2.59E+00 Resolution <4 4-7 <4 <4 tance Criteria 0.4-2.5 0.5-2.0 0.4-2.5 0.4-2.5 mple/Duplicate 1.56E+00 Pass 9.81E-01 Pass 7.88E-01 Pass 9.84E-01 Pass L310218CSGSSS-B030 3.45E-01 1.10E-01 < 4.00E-02 6.94E+00 9.84E-01 2.77E-01 5.89E-02 2.46E-01 6.61E-02 L310218CDGSSS-B030 3.13E-01 7.74E-02 < 3.14E-02 7.59E+00 9.84E-01 2.73E-01 5.14E-02 2.24E-01 5.89E-02 e/Uncertianty 3.14E+00 N/A 7.05E+00 4.70E+00 3.72E+00 Resolution <4 Acceptance 4-7 4-7 <4 tance Criteria 0.4-2.5 Resolution Criteria 0.5-2.0 0.5-2.0 0.4-2.5 mple/Duplicate 1.10E+00 Pass <4 0.40-2.50 9.14E-01 Pass 1.01E+00 Pass 1.10E+00 Pass 4-7 0.5-2.00 8-15 0.60-1.66 16-50 0.75-1.33 51-200 0.80-1.25

>200 0.85-1.18 8

Attachment 1-7 SU10218B West Side of ISFSI Hard-To-Detect Radionuclide Analysis Results

Attachment 1-7 10218B West Side of ISFSI HTD Sam ple results (in pCi/g) 3/26/2012 Collection Sample 2.0 s 2.0 s 2.0 s 2.0 s Sample ID Date Media H-3 Uncertianty Fe-55 Uncertianty Ni-63 a Uncertianty Sr-90 a Uncertianty L310218CSGSSSB008 11/17/2011 Soil < 7.03E-01 < 2.61E-01 < 2.35E-01 < 1.34E-01 L310218CSGSSBB008 11/17/2011 Soil < 7.14E-01 < 2.59E-01 < 2.25E-01 1.27E-01 4.89E-02 L310218CSGSSSB013 11/17/2011 Soil < 7.10E-01 < 1.88E-01 < 2.46E-01 5.62E-01 8.90E-02 L310218CSGSSBB013 11/17/2011 Soil < 7.00E-01 < 2.56E-01 3.98E-01 1.51E-01 < 1.42E-01 L310218CSGSSSB020 11/17/2011 Soil < 7.33E-01 < 2.64E-01 2.99E-01 3.83E-01 8.67E-02 L310218CSGSSBB020 11/17/2011 Soil < 7.19E-01 < 2.38E-01 < 1.39E-01 < 1.34E-01 L310218CSGSSSB024 11/16/2011 Soil < 7.19E-01 < 2.87E-01 < 2.29E-01 1.66E-01 7.65E-02 L310218CSGSSBB024 11/16/2011 Soil < 7.19E-01 < 2.74E-01 < 2.30E-01 < 1.06E-01 L310218CDGSSSB024 11/16/2011 Soil < 6.98E-01 < 2.45E-01 < 2.26E-01 < 1.33E-01 L310218CSGSSSB028 11/16/2011 Soil < 7.02E-01 < 2.05E-01 3.74E-01 1.87E-01 2.01E-01 7.85E-02 L310218CSGSSBB028 11/16/2011 Soil < 6.99E-01 < 2.83E-01 < 2.32E-01 1.68E-01 6.60E-02 a

As per communications w ith the vendor laboratory the positive results noted f or Ni-63 and Sr-90 are due to method noise (noise level equivalent) and are therefore f alse positives.

10

Attachment 1-8 SU10218C Asphalt Roadway South of Switchyard Gamma Spectroscopy Analysis

Attachment 1-8 10218C Gamma Spectroscopy Analysis Results (in pCi/g) 2/27/2012 Collection Sample 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s Sample ID Date Media Ac-228 Error Am-241 Error Co-60 Error Cs-134 Error Cs-137 Error Eu-154 Error L310218CJPAAVC001 11/15/2011 Asphalt 1.44E-01 5.17E-02 < 4.03E-02 < 2.23E-02 < 1.69E-02 < 1.98E-02 < 6.06E-02 L310218CJGSSSC001 11/15/2011 Gravel/Soil < 8.25E-02 < 2.83E-02 < 2.11E-02 < 1.19E-02 < 1.55E-02 < 4.42E-02 L310218CJGSSBC001 11/15/2011 Gravel/Soil < 1.66E-01 < 5.33E-02 < 3.82E-02 < 2.28E-02 < 2.46E-02 < 1.04E-01 L310218CJPAAVC002 11/15/2011 Asphalt 1.43E-01 4.76E-02 < 3.84E-02 < 2.49E-02 < 1.64E-02 < 1.92E-02 < 5.64E-02 L310218CJGSSSC002 11/15/2011 Gravel/Soil < 1.11E-01 < 3.24E-02 < 2.41E-02 < 1.45E-02 < 1.78E-02 < 5.06E-02 L310218CJGSSBC002 11/15/2011 Gravel/Soil 3.56E-01 1.00E-01 < 6.69E-02 < 4.75E-02 < 4.50E-02 < 4.31E-02 < 1.33E-01 L310218CJPAAVC003 11/15/2011 Asphalt 1.45E-01 4.35E-02 < 3.98E-02 < 2.31E-02 < 1.96E-02 < 1.72E-02 < 5.34E-02 L310218CJGSSSC003 11/15/2011 Gravel/Soil 2.43E-01 4.37E-02 < 3.56E-02 < 2.22E-02 < 1.53E-02 < 1.82E-02 < 5.66E-02 L310218CJGSSBC003 11/15/2011 Gravel/Soil 2.12E-01 4.94E-02 < 4.50E-02 < 3.09E-02 < 2.06E-02 9.86E-03 1.21E-02 < 8.13E-02 L310218CJPAAVC004 11/16/2011 Asphalt < 1.83E-01 < 5.17E-02 < 4.85E-02 < 3.66E-02 < 4.12E-02 < 1.26E-01 L310218CJGSSSC004 11/16/2011 Gravel/Soil 2.43E-01 5.60E-02 < 4.22E-02 < 2.46E-02 < 1.44E-02 2.22E-02 1.70E-02 < 6.33E-02 L310218CJGSSBC004 11/16/2011 Gravel/Soil 2.10E-01 7.63E-02 < 5.37E-02 < 3.14E-02 < 2.25E-02 < 2.52E-02 < 8.20E-02 L310218CJPAAVC005 11/16/2011 Asphalt 2.31E-01 8.29E-02 < 5.39E-02 < 5.24E-02 < 3.60E-02 < 4.05E-02 < 1.27E-01 L310218CJGSSSC005 11/16/2011 Gravel/Soil 2.37E-01 4.05E-02 < 2.91E-02 < 1.82E-02 < 1.31E-02 < 1.58E-02 < 4.88E-02 L310218CJGSSBC005 11/16/2011 Gravel/Soil 2.02E-01 5.69E-02 < 4.49E-02 < 2.48E-02 < 1.65E-02 < 2.11E-02 < 6.79E-02 L310218CJPAAVC006 11/16/2011 Asphalt 1.90E-01 9.70E-02 < 5.26E-02 < 3.56E-02 < 3.17E-02 < 3.88E-02 < 1.34E-01 L310218CJGSSSC006 11/16/2011 Gravel/Soil 1.92E-01 4.48E-02 < 2.93E-02 < 2.18E-02 < 1.32E-02 < 1.60E-02 < 5.19E-02 L310218CJGSSBC006 11/16/2011 Gravel/Soil < 2.31E-01 < 4.81E-02 < 2.78E-02 < 1.94E-02 3.16E-02 2.42E-02 < 7.28E-02 10218C Gamma Spectroscopy Analysis Results (in pCi/g) Continued Collection Sample 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s Sample ID Date Media Eu-155 Error I-129 Error K-40 Error Pb-212 Error Tl-208 Error U-235 Error L310218CJPAAVC001 11/15/2011 Asphalt < 4.64E-02 < 4.62E-02 3.54E+00 5.40E-01 1.56E-01 3.84E-02 1.15E-01 3.34E-02 < 1.07E-01 L310218CJGSSSC001 11/15/2011 Gravel/Soil < 3.45E-02 < 3.66E-02 4.74E+00 5.66E-01 1.89E-01 3.81E-02 1.34E-01 3.06E-02 < 8.42E-02 L310218CJGSSBC001 11/15/2011 Gravel/Soil < 6.34E-02 < 6.37E-02 7.76E+00 9.93E-01 3.05E-01 4.39E-02 2.09E-01 5.00E-02 < 1.35E-01 L310218CJPAAVC002 11/15/2011 Asphalt < 4.78E-02 < 4.40E-02 3.69E+00 5.63E-01 1.54E-01 2.87E-02 1.21E-01 3.28E-02 < 1.05E-01 L310218CJGSSSC002 11/15/2011 Gravel/Soil < 4.13E-02 < 4.33E-02 5.67E+00 6.77E-01 2.25E-01 3.76E-02 1.57E-01 3.37E-02 < 9.55E-02 L310218CJGSSBC002 11/15/2011 Gravel/Soil < 7.98E-02 < 6.58E-02 7.34E+00 1.14E+00 2.63E-01 4.96E-02 2.80E-01 7.49E-02 < 1.95E-01 L310218CJPAAVC003 11/15/2011 Asphalt < 4.70E-02 < 4.32E-02 3.21E+00 5.33E-01 1.62E-01 2.90E-02 1.22E-01 3.60E-02 < 1.14E-01 L310218CJGSSSC003 11/15/2011 Gravel/Soil < 4.63E-02 < 4.39E-02 5.38E+00 6.73E-01 2.11E-01 3.18E-02 1.80E-01 4.16E-02 < 1.17E-01 L310218CJGSSBC003 11/15/2011 Gravel/Soil < 4.97E-02 < 5.41E-02 5.15E+00 7.15E-01 2.01E-01 3.25E-02 1.48E-01 4.02E-02 < 1.11E-01 L310218CJPAAVC004 11/16/2011 Asphalt < 6.54E-02 < 5.91E-02 3.49E+00 6.94E-01 1.14E-01 4.02E-02 1.08E-01 4.80E-02 < 1.55E-01 L310218CJGSSSC004 11/16/2011 Gravel/Soil < 3.81E-02 < 4.10E-02 6.23E+00 8.05E-01 2.23E-01 3.26E-02 1.82E-01 4.04E-02 < 1.10E-01 L310218CJGSSBC004 11/16/2011 Gravel/Soil < 5.93E-02 < 5.98E-02 6.36E+00 8.49E-01 2.61E-01 4.09E-02 2.21E-01 5.13E-02 < 1.31E-01 L310218CJPAAVC005 11/16/2011 Asphalt < 6.15E-02 < 6.08E-02 3.40E+00 7.22E-01 1.30E-01 5.30E-02 1.22E-01 5.61E-02 < 1.59E-01 L310218CJGSSSC005 11/16/2011 Gravel/Soil < 3.64E-02 < 3.66E-02 4.93E+00 5.83E-01 1.97E-01 2.71E-02 1.69E-01 3.29E-02 < 8.85E-02 L310218CJGSSBC005 11/16/2011 Gravel/Soil < 5.57E-02 < 4.53E-02 6.68E+00 8.75E-01 2.47E-01 3.61E-02 1.62E-01 4.17E-02 < 1.28E-01 L310218CJPAAVC006 11/16/2011 Asphalt < 6.06E-02 < 5.71E-02 3.09E+00 6.55E-01 1.60E-01 5.64E-02 1.45E-01 4.98E-02 < 1.55E-01 L310218CJGSSSC006 11/16/2011 Gravel/Soil < 3.97E-02 < 3.98E-02 4.89E+00 5.89E-01 2.11E-01 2.81E-02 1.32E-01 3.19E-02 < 8.98E-02 L310218CJGSSBC006 11/16/2011 Gravel/Soil < 5.79E-02 < 5.15E-02 6.10E+00 8.50E-01 2.45E-01 3.74E-02 2.40E-01 5.73E-02 < 1.29E-01

Attachment 1-9 SU10218D Mix Plant Foundation Concrete Cores Gamma Spectroscopy Analysis

Attachment 1-9 a Spectroscopy Analysis Results (in pCi/g)

Sample 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s Media Ac-228 Error Am-241 Error Co-60 Error Cs-134 Error Cs-137 Error Eu-154 Error Concrete 2.46E-01 6.93E-02 < 5.20E-02 < 3.31E-02 < 2.16E-02 < 2.32E-02 < 8.72E-02 Concrete < 2.57E-01 8.49E-02 < 6.41E-02 < 5.14E-02 < 3.82E-02 < 3.92E-02 < 1.45E-01 a Spectroscopy Analysis Results (in pCi/g)

Sample 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s Media Eu-155 Error I-129 Error K-40 Error Pb-212 Error Tl-208 Error U-235 Error Concrete < 6.00E-02 < 5.77E-02 4.42E+00 6.69E-01 2.26E-01 3.62E-02 2.26E-01 5.03E-02 < 1.27E-01 Concrete < 7.29E-02 < 6.92E-02 4.26E+00 8.06E-01 2.12E-01 5.28E-02 2.24E-01 7.14E-02 < 1.80E-01

Attachment 1-10 SU10218E Hazardous Waste Storage Pad Concrete Cores Gamma Spectroscopy Analysis

Attachment 1-10 e Storage Pad Gamma Spectroscopy Analysis Results (in pCi/g) sis is based on samples collected from the pad in in August of 2011)

Collection Sample 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s Date Media Ac-228 Error Am-241 Error Co-60 Error Cs-134 Error Cs-137 Error Eu-154 Error 8/162012 Concrete 3.21E-01 1.80E-01 < 9.70E-02 < 6.73E-02 < 5.03E-02 < 5.91E-02 < 1.68E-01 8/162012 Concrete < 2.81E-01 < 9.97E-02 < 6.03E-02 < 4.86E-02 < 6.18E-02 < 1.43E-01 8/162012 Concrete 1.75E-01 7.25E-02 < 5.82E-02 < 4.01E-02 < 3.72E-02 < 4.30E-02 < 1.26E-01 e Storage Pad Gamma Spectroscopy Analysis Results (in pCi/g) sis is based on samples collected from the pad in in August of 2011)

Collection Sample 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s 2.0 s Date Media Eu-155 Error I-129 Error K-40 Error Pb-212 Error Tl-208 Error U-235 Error 8/162012 Concrete < 1.13E-01 < 1.07E-01 6.81E+00 1.29E+00 3.72E-01 7.70E-02 2.20E-01 9.32E-02 < 2.64E-01 8/162012 Concrete < 1.14E-01 < 1.25E-01 8.00E+00 1.39E+00 4.46E-01 8.22E-02 2.20E-01 8.42E-02 < 2.65E-01 8/162012 Concrete < 7.09E-02 < 8.24E-02 8.21E+00 4.42E-01 < 6.93E-02 < 1.35E-01 < 1.92E-01