ML22069A339

Supporting Documents for Response to Request for Additional Information Related to Partial Site Release and Recent Site Survey Activities, TSD-13-004 Rev 0, Examination of Cs-137 Global Fallout in Soils at Zion Station

ML22069A339
Person / Time
Site:	Zion  File:ZionSolutions icon.png
Issue date:	05/29/2013
From:	ZionSolutions
To:	Office of Nuclear Material Safety and Safeguards
Shared Package
ML22069A328	List: ML22069A329 ML22069A330 ML22069A331 ML22069A332 ML22069A333 ML22069A334 ML22069A335 ML22069A336 ML22069A337 ML22069A338 ML22069A339 ML22069A340 ML22069A341
References
ZS-2022-005 TSD-13-004, Rev 0
Download: ML22069A339 (38)

Text

ZionSolutions, Inc.

EH&S Technical Support Document ZIONSOLUTIONSLC TSD # 13-004 Examination of Cs-137 Global Fallout In Soils At Zion Station Revision 00 Originator:

4 Date: /Z 67- /3 Harvey Farr RSC Radiological Engineer Reviewer: Date: S12-97/3 Robert Decker ZionSolutions LTP Radiological Engineer Approval: Date: 5- .27 /_,.?

Steve Horvath ZionSolution haracterization/License Termination Manager

EH&S TSD # 13-004 Revision 00 Page 2 of 38 1.0 Introduction This TSD provides a review of information from published global fallout studies and ZionSolutions soil sample data. The TSD establish the technical basis for anticipated soil concentrations attributable to fallout and establishes criteria for investigating soil Cs-137 concentrations that are higher than those anticipated due to word-wide fallout.

2.0 Table of Contents 1.0 Introduction ..................................................................................................................................2 2.0 Table of Contents.........................................................................................................................2 3.0 Background ..................................................................................................................................2 4.0 Definitions ....................................................................................................................................2 5.0 Calculations and Evaluations .......................................................................................................2 5.1 Background Cs-137 Levels from Nuclear Weapons Testing .......................................................2 5.2 Background Cs-137 Levels in Zion Soils ...................................................................................15 6.0 Conclusion .................................................................................................................................26 7.0 Attachments ...............................................................................................................................26 7.1 Attachment A - Zion Site Layout with Future ISFSI Location .....................................................27 7.2 Attachment B - All Soil Sample Results Background Studies and Class 3 Southwest Survey Units ..........................................................................................................................................27 8.0 References.................................................................................................................................27 3.0 Background For confirmation surveys of non-impacted land areas and MARSSIM Class 2 and 3 land areas it is important to distinguish licensed materials originating from facility operations from world-wide fallout in order to establish reasonable action levels requiring further investigation. In order to establish investigation criteria indicative of Cs-137 contamination levels in soil that are distinguishable from background levels, a review of predicted fallout levels and results of studies is provided and ZionSolutions soil sample results for Cs-137 in soils to date are compared to those anticipated from world-wide fallout based upon the literature.

4.0 Definitions Investigation criterion- An activity limit at which further evaluation of the survey data is required for a MARSSIM Class 1 survey area. The investigation criterion is typically set at a value that ensures that the DCGLEMC will not be exceeded. [1]

World-Wide Fallout - The descent and deposition of radioactive material in the atmosphere onto the earth following a nuclear explosion, incident, or accident.

5.0 Calculations and Evaluations 5.1 Background Cs-137 Levels from Nuclear Weapons Testing As noted in a Historical Overview of Atmospheric Nuclear Weapons Testing and Estimates of Fallout In the Continental United States by Beck and Bennet [2]. from 1945 to 1980, over 500 weapons tests were conducted in the atmosphere at a number of locations around the world.

These tests resulted in the release of substantial quantities of radioactive debris to the environment. The amount of fallout and its geographical distribution was a function of the location, yield, height of burst, and meteorological conditions associated with the various tests.

[2] As seen in Figure 1 only Cs-137 is readily detectable by gamma spectroscopy and has a long enough half-life to remain present in the environment from fallout.

EH&S TSD # 13-004 Revision 00 Page 3 of 38 Figure 1 - Beck Summary of Some of the More Important Fission and Activation Nuclides Produced In Weapons Tests [2].

As Beck and Bennet point illustrate in Figure 2, Cs-137 fall out is predominantly from nuclear weapons tests in comparison to accidental releases from accidents such as Chernobyl and Windscale.

Figure 2 - Activity of Cs-137, I-131, and Pu-239, 240 (PBq) produced by atmospheric weapons tests compared with reported releases that occurred as a result of accidents or production of fuels.

Deposition of cesium from fallout peaked in the United States in the mid-1960s and contributions following 1980 are generally insignificant. The possible exception was depositions resulting from the Chernobyl nuclear reactor accident in 1986. However, while small increases could be measured in the United States, the increases were not significant in comparison to depositions from weapons testing fallout. [3] A PBq (petabecquerel) is 1015 Bq.

Estimates of the Cs-137 released into the atmosphere from the March 2011 Fukushima Daichii accident range from 13 x 1015 Bq (13 PBq) up to 50 x 1015 Bq (50 PBq) [4]

Thus Cs-137 fallout in the U.S. is still predominantly from nuclear weapons testing in comparison to releases from nuclear accidents. Most of the fallout in the eastern United States from Nevada tests resulted from precipitation scavenging when the fallout clouds intersected rain clouds. [2] In the fall of 1951 the Health and Safety Laboratory (HASL) established a network of fixed stations throughout the world using a semiquantitative system based on deploying trays filled with water and/or trays of gummed film at weather stations. The gummed film and precipitation sampling provided estimates of daily or weekly deposition at a fairly large number of sites and allowed estimates to be made of the total global deposition. [2]

EH&S TSD # 13-004 Revision 00 Page 4 of 38 Fallout data is typically reported as activity per unit surface area (e.g., Bq/m2, nCi/m2, etc.).

Note that 1 Bq equals approximately 27 pCi. This provides a more accurate depiction of the total deposition since the results are not influenced by the density of the soil or other medium on which the fall out deposits. In addition, results reported as activity per surface area are not influenced by the rate at which the nuclide migrates through the soil to as great an extent as typical environmental sample measurements based upon activity per unit mass. For example, two different locations with identical depositions in Bq/m2 could have drastically different soil concentrations if ones soil was rich in organic material, and thus had a lower bulk density, and the other was clay like or sand like material, with a high bulk density. Even if the nuclide was distributed to the same depth, the difference in the densities of the soil types would yield different soil concentrations in pCi/g.

Estimates of Nevada Test Site (NTS) fallout depositions were confirmed by large-scale soil sample surveys carried out by HASL and U.S. Department of Agriculture (USDA) investigators. Large-scale soil sampling was carried out every few years beginning in the early 1950s with the last survey occurring in the late 1960s. Generally about 50 to 100 sites were sampled during each survey. Over 500 samples were collected over the testing period. Many sites were resampled several times allowing estimates to be made of the deposition since the previous sampling. The samples were at first analyzed only for Sr-90. Many of the early samples were retained at HASL and later reanalyzed for long-lived radionuclides, such as plutonium isotopes and Cs-137. [2] The total deposition of Sr-90 from all tests as a function of latitude, based on the soil sample and deposition data, is shown in Figure 3. As can be seen, the deposition varied with latitude, peaking in the 40 to 50 degree north latitude band. This apparently reflects preferential stratospheric to troposphere transfer at the mid latitudes.

Figure 3 - Variation of total Sr-90 deposition with latitude. [2]

It also reflects the fact that most of the debris was injected into the stratosphere in the northern hemisphere, and that the transfer from the northern hemisphere to the southern hemisphere is very slow. About 460 PBq of the estimated total 604 PBq of Sr-90 deposited globally was

EH&S TSD # 13-004 Revision 00 Page 5 of 38 deposited in the northern hemisphere. Zion Illinois has a latitude of 42.4461° N which corresponds to the latitude with the highest fallout deposition.

Figure 4 - Cesium-137 deposition density in the northern and southern hemispheres [5]

As seen in Figure 4 Cs-137 fallout peaked in the 1963 to 1964 time frame in the 40 to 50 degrees north latitude region of the northern hemisphere. UNSCEAR [5] reports provide estimates of total deposition of various radionuclides from global fallout. While such reports are suitable for estimating the overall or average hemispheric impact, they do not reflect the actual geographical variation across the continental United States. [2] It is well established that the major mechanism for the deposition of global fallout was precipitation scavenging and rainout. Numerous studies demonstrated that in any particular area the deposition was generally proportional to the amount of rain experienced. [2] Fallout depositions vary longitudinally across the Continental U.S. due to washout and rainfall patterns. Zion is located at 87.8328° W longitude and would have a correction factor of 0.8 for NTS related fallout. [2]

Figure 5 - Estimated Longitudinal Variation in NTS Fallout by Longitude Over the United States

[2]

This does not account for variation in fallout deposition patterns for non-NTS weapons testing global fallout.

Local or regional measurements of Cs-137 are typically compared to baseline estimates of Cs-137 concentrations world-wide which are calculated from deposition measurements of Sr-90.

EH&S TSD # 13-004 Revision 00 Page 6 of 38 These estimates use a well-established Cs-137 to Sr-90 deposition ratio of 1.6 for fallout. [3]

Table 2.1 (Figure 6 of this TSD) of a 1994 report on Cs-137 distributions in residential areas

[3] provides such estimates of Cs-137 depositions by latitude integrated to 1980 and decay corrected to 1991.

Figure 6 - Estimated Soil Fallout Concentrations by Latitude Based Upon Estimates of Global Fall Out [3]

The calculated soil concentration in the 40 to 50 degrees north latitude where Zion is located is 0.16 pCi/g for a 0 - 30 cm core length of soil with a bulk density of 1.6 g/cm3. [3] As noted in the report, such generalized estimates of soil concentrations from global fallout do not adequately address the variations in actual fallout depositions and variability in Cs-137 concentration and redistribution in the environment. [3] The authors of the referenced study [3]

state that within the region of interest (40º to 50º North Latitudes) and given normal soil variability, soil Cs-137 concentration would be expected to range from about less than 0.2 pCi/g to 1 pCi/g. These estimates assume an average soil density of 1.6 g/cm3 which is reasonable for U.S. soils. However, soil density can vary significantly in local areas and may commonly range from about 1 to more than 2 g/cm3. Such variations can cause concentrations to vary several fold or more even with the same fallout depositions. For instance, varying the

EH&S TSD # 13-004 Revision 00 Page 7 of 38 soil density over this range changes the estimated range of Cs-137 concentrations in the soils from 0.1 pCi/g to 2.0 pCi/g. However, cesium migrates slowly and is not evenly distributed by depth. Using Cs-137 soil migration measurements, the study [3] predicted a up to 0.8 pCi/g [30 Bq/kg] in the first 0.5 cm of surface soil and about 0.1 pCi/g [3.7 Bq/kg] in soil at the 5 to 30 cm depth. [3]

The study from which the above information was obtained was published in 1994. [3] The study examined natural variation in fallout Cs-137 concentrations in residential areas in comparison to the predicted range of concentrations of 0.1 to 0.8 pCi/g Cs-137 concentrations from fallout. [3] The study data included about 600 sample locations from over 200 properties in central New York, 26 properties in Beverly, Massachusetts, and 10 properties in northeastern Pennsylvania. The specific sites reviewed in this study all are in the 40º to 50º North Latitudinal region as is Zion. All the data was decay corrected to 1991.As seen in Figure 7, for Central New York the range of and geometric mean of Cs-137 concentrations were higher than the predicted 0.10. to 0.8 pCi/g range in drainage areas and the upper 95%

confidence levels of the non-drainage areas was 3 times higher than the predicted 0.8 pCi/g value. [3]

1 - Conditions include drainage areas (locations that collect water) and nondrainage areas (open areas such as lawns and fields. 2 - Subsurface samples where [sic] taken from high concentration area, and, hence, are biased high in comparison to surface samples. 3 - About 40% of the samples contained cesium-137 at levels below detectable limits.

Figure 7 - Colonie New York Residential Soil Concentrations The Beverly MA (Figure 8) and Luzerne County PA (Figure 9) data had somewhat lower geometric means and upper 95% confidence ranges. However they were still well above the predicted concentrations based upon overall world-wide fallout deposition in the 40 to 50 degree North latitude.

EH&S TSD # 13-004 Revision 00 Page 8 of 38 1 - Conditions include drainage areas (areas that collect water) and nondrainage areas (open areas such as lawns and fields).

Wet areas are those that are frequently under water (tidal and beach front areas).

Figure 8 - Beverly MA Residential Soil Concentrations

EH&S TSD # 13-004 Revision 00 Page 9 of 38 1 - Conditions include Drainage areas (areas that collect rain water) and nondrainage areas (open areas such as lawns and fields). Some areas were also classified as disturbed and undisturbed Figure 9 - Luzerne County PA Residential Soil Concentrations All three locations found Cs-137 concentrations in drainage areas were two to three times higher than in non-drainage areas. As seen in Figure 10, evaluation of the Luzerne County data relative to whether the soil was disturbed or undisturbed showed that the highest concentrations were found in the upper 5 to 10 cm of undisturbed soil as would be expected.

Since the highest levels are found in the upper 5 cm, mixing of the soil lowers the overall average concentration. Disturbed soils included tilled locations and locations where fill was used.

EH&S TSD # 13-004 Revision 00 Page 10 of 38 1 - Conditions include drainage and nondrainage areas and disturbed (normally flower beds or areas where there was evidence of fill material) and undisturbed areas (those with no evidence that the soil was excavated or filled).

Figure 10 - Luzerne County PA Disturbed and Undisturbed Residential Soil Concentrations The analysis indicates that cesium moves slowly in the soil and unless physically disturbed and remains in the surface layer. The data also indicated that Cs-137 concentrations in drainage areas (e.g., roof driplines and drain spout discharge locations) are significantly higher than concentrations in open areas. More specifically, the study resulted in 5 general conclusions or findings:

• The analysis indicates that fallout deposition data do not adequately predict the variability in local background concentrations for Cs-137 in soil. Surface samples from undisturbed soil produce the greatest variability and can differ by several orders of magnitude. The 1991 surface sample geometric mean concentrations were in the range from 0.3 to 3 pCi/g

[10 to 110 Bq/kg] with the range of the 95th percentile concentrations extending to about 20 pCi/g [700 Bq/kg]. [3]

• Areas that collect rain water have significantly higher concentrations of Cs-137 in soil than open areas. The geometric mean concentrations in drainage areas are typically 3 times that of non-drainage areas. [3]

• The concentration of Cs-137 in soil decrease significantly with depth. In general, most of the cesium is contained in the top 15 cm of undisturbed soil. [3]

• Surface samples taken from the 0 to 5 cm depth in undisturbed soil had significantly higher concentrations than those taken at the same depth in disturbed soil. However, surface

EH&S TSD # 13-004 Revision 00 Page 11 of 38 samples taken over the 0 to 10 cm or 0 to 15 cm range were less sensitive to soil disturbance. [3]

• The lognormal distribution is generally more representative of environmental concentrations of Cs-137 than the normal distribution. [3]

The study concluded that in general, fallout deposition data can be used to predict total surface inventory in a large area but it does not provide a good measure of central tendency and variability for background Cs-137 concentrations for remedial action or decontamination planning activities in residential, commercial or industrial areas. A reasonable estimate of such background variability can only be obtained by direct sampling and measurement of local data from a nearby area (with like soil and drainage conditions) that has not been affected by the operating facility. [3]

The study reinforces that in addition to local variations due to atmospheric dispersion and washout, factors such as the land-use characteristics, soil bulk density, amount of organic material and drainage affect the Cs-137 levels from fallout in the soil. Transport of the cesium in the soil, once it is deposited, is affected by many site specific factors including soil type, rainfall, drainage, terrain, vegetation and local activities and conditions. Furthermore, local meteorological conditions can have significant impact on the fallout deposition and transport in a given area. Finally, sampling protocol significantly effects the reported soil concentrations.

[3] Once in contact with the soil, Cs-137 is tightly bound by the clay-size soil fraction and organic matter, and its further movement by natural chemical processes in the environment is limited. [6] Soils that have been disturbed since the peak depositions in the 1960s, such as those from agricultural tilling, construction work or made ground (e.g., fill) would have lower overall fallout concentrations than natural undisturbed locations due to the variation in concentrations with soil depth. Undisturbed soils in forested areas tend to have higher Cs-137 concentration in the upper 5 to 10 cm due to root uptake and leaf litter deposition which continuously re-deposits Cs-137 on the surface of the forest floor. Drainage areas or areas where water tends to accumulate and evaporate are locations that concentrate Cs-137 in soil.

These factors apply to more natural forested and agricultural areas as well as residential areas. A study of Cs-137 fallout redistribution in soils was conducted in 1974 and 1975 for the Brunner Creek watershed of White Clay Lake in Shawano County Wisconsin. [6] As noted in Figure 11, White Clay Lake is located northwest of Green Bay Wisconsin approximately 190 miles from Zion at Latitude 44-48'05 N and Longitude: 088-24'15 W. It is in the same zone of higher fallout deposition between 40 and 50 degrees North as Zion Station.

EH&S TSD # 13-004 Revision 00 Page 12 of 38 Figure 11 - White Clay Lake Shawano County, WI Location The study [6] measured fallout Cs-137 levels (nCi/m2) for undisturbed woodland, pasture and marsh soils as well disturbed corn and alfalfa field soils. Major soil types in the watershed area were Onaway loam, Salona loam, and Shiocton silt loam. Land use types sampled were from a 40- to 50- year old upland oak-maple forest that showed no evidence of soil erosion, from corn and alfalfa fields, from pastures, and from a low marshy area where Brunner Creek enters White Clay Lake. Samples of the sediment in the delta area where Brunner Creek enters White Clay Lake were also collected. [6] The data from the reported results are provided in Figure 12.

EH&S TSD # 13-004 Revision 00 Page 13 of 38 Figure 12 - Average concentrations and standard error of the mean of Cs-137 (nCi/m2) in soil profiles under different conditions.

The data indicates that Cs-137 is retained in the upper 15 cm of undisturbed soils and that collection by marsh and lake sediments of eroded soils can lead to high concentrations similar to the upper layers of undisturbed soils. Although the data set is limited, it can be corrected to pCi/g based upon 1000 pCi/nCi and an average soil bulk density of 1.63 g/cm3 which equates to 8000 grams of material for every 5 cm of depth over a 1 m2 area. Assuming sample dates of January 1, 1975 for the samples collected in 1974 and 1975 this a 38.4 year decay time to June 1, 2013 which is just over the 30 year half-life of Cs-137. The decay corrected values in pCi/g at an average bulk density of 1.63 g/cm3 are provided in Table 1.

EH&S TSD # 13-004 Revision 00 Page 14 of 38 Table 1 - Brunner Creek Drainage Basin Decay Corrected Cs-137 Concentrations OakMaple Pasture Corn Alfalfa Marsh Sediment Activity Error Activity Error Activity Error Activity Error Activity Error Activity Error Depth cm pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g pCi/g 0 5 2.8E01 +/- 1.0E02 2.8E01 +/- 1.8E02 9.9E02 +/- 4.1E03 9.6E02 +/- 4.1E03 2.0E01 +/- 2.1E02 2.7E01 +/- 5.9E02 510 2.1E01 +/- 1.4E02 2.1E01 +/- 4.1E03 1.0E01 +/- 4.1E03 1.0E01 +/- 4.1E03 2.3E01 +/- 2.4E02 8.9E02 +/- 2.6E02 1015 9.3E02 +/- 1.4E02 7.4E02 +/- 5.1E04 1.0E01 +/- 3.1E03 1.0E01 +/- 4.1E03 1.7E01 +/- 3.0E02 1.5E02 +/- 6.7E03 1520 3.4E02 +/- 4.6E03 1.9E02 +/- 8.2E03 1.0E01 +/- 2.6E03 9.3E02 +/- 4.6E03 1.5E01 +/- 3.6E02 1.5E02 +/- 6.7E03 2025 1.6E02 +/- 5.7E03 1.3E02 +/- 2.1E03 9.0E02 +/- 4.6E03 7.6E02 +/- 7.2E03 1.5E01 +/- 4.2E02 4.1E03 +/- 2.6E03 2530 No Sample No Sample 4.9E02 +/- 7.2E03 5.0E02 +/- 7.7E03 4.7E02 +/- 1.4E02 4.1E03 +/- 2.6E03 30 35 No Sample No Sample 3.9E02 +/- 8.2E03 4.6E02 +/- 6.2E03 No Sample No Sample 3540 No Sample No Sample 1.6E02 +/- 4.1E03 1.7E02 +/- 3.6E03 No Sample No Sample 4045 No Sample No Sample 8.2E03 +/- 4.1E03 4.6E03 +/- 1.0E03 No Sample No Sample Total 0.636 +/- 0.026 0.592 +/- 0.003 0.566 +/- 0.021 0.554 +/- 0.026 0.946 +/- 0.091 0.359 +/- 0.086 015 cm Average 0.194 +/- 0.013 0.187 +/- 0.008 0.100 +/- 0.004 0.101 +/- 0.004 0.200 +/- 0.025 0.124 +/- 0.031 30 45 cm Average No Sample No Sample 0.021 +/- 0.005 0.023 +/- 0.004 No Sample No Sample Range 0.525 0.725 0.586 0.597 0.453 0.658 0.350 0.725 0.458 1.316 0.159 0.905 Number of Samples 6 2 23 23 7 9

EH&S TSD # 13-004 Revision 00 Page 15 of 38 The concentration of Cs-137 was highest in the marsh community where concentrations up to 256 nCi/m2 (e.g., 1.32 pCi/g decay corrected) where some evaporative concentration would be expected. This is also a deposition area for soil particles eroded from the upland.

Concentrations of Cs-137 were lowest in the alfalfa and corn fields where erosion had occurred, removing some soil and its associated Cs-137. [6] Tilling of the soil which mixes soils homogeneously over a 30 cm to 40 cm depth also would have contributed to lower overall concentrations although this was not noted in the study. Fill material from local gravel/sand pits or construction activities that mix soils over a deeper horizon than 15 cm would result even lower overall concentrations.

5.2 Background Cs-137 Levels in Zion Soils Two studies on soil type and background fallout levels have been conducted in the immediate vicinity of Zion Station. These studies have focused on areas in the eastern portions of the property near Lake Michigan. These areas have consisted of Hosah Park non-impacted areas

[7] and areas located north and northwest of the facility. [8] It was determined that the best location for measuring background would be outside the restricted area boundary toward the north as based in part on Reference 6.1 of one of the studies [8], Annual Report on the Meteorological Monitoring Program at Zion Nuclear Power Station for 2010, Murray and Trettel, Inc. 2/21/2011. The reference demonstrates that winds are predominately from the west and northwest. As a result, locations north and northwest of the restricted area are less likely to be impacted by airborne particulate and gaseous effluents from past plant operations.

An initial determination of background Cs-137 levels was conducted to determine the radionuclide activity concentration of key radionuclides in non-impacted soils adjacent to the Zion Nuclear Station. [7] The area chosen for the survey was the Zion City Park District's Hosah Park, located north east of the Zion Nuclear Station, at the end of Shiloh Blvd. [7], as seen in Attachment A. The park consists of open land areas with a small shelter and several asphalt walking trails. There is evidence of several old foundations present indicating some potential soil disturbance since the.1960s. The land area is covered with native grasses and low lying brush. For the most part the open land area appeared not to have been disturbed for a number of years. Prior to the survey, thirty (30) soil sampling locations were identified in Hosah Park. The sampling locations were chosen in areas that appeared to be undisturbed with minimal vegetation as shown in Figure 13.

EH&S TSD # 13-004 Revision 00 Page 16 of 38 Figure 13 - Hosah Park Background Soil Evaluation Location [7]

The sampling protocols, analyses and results are described in the technical report Determination of Radionuclide Activity Concentrations In Soils In Non-Impacted Soils Adjacent to the Zion Nuclear Station, July 2012. [7] At each sampling location a surface (0 -15 cm) and a subsurface (30 - 60 cm) soil sample was collected. As they were collected each soil sample was screened in the field to remove debris, vegetation, and rocks greater than 1 cm in diameter. A total of 64 samples were submitted to an offsite laboratory for analysis. Each soil sample was analyzed for gamma emitting nuclides by gamma spectroscopy. These included (Co-60 and Cs-137), Sr-90, thorium isotopic (Th-228, Th-230, and Th-232), and uranium isotopic (U-234, U-23S, and U-238). The sample analysis results for select radionuclides are provided in Attachment 3 for the surface soil samples and in for the subsurface soil samples of the report [7]. The Cs-137 results for the surface (SSS) and subsurface (SSB) Hosah Park samples are provided in Table 2 below.

EH&S TSD # 13-004 Revision 00 Page 17 of 38 Table 2 - Hosah Park Surface (SSS) and Subsurface (SSB) Cs-137 Results in pCi/g Sample Sample Type Type SSS = SSB =

Cs137 Surface Cs137 Subsurface Activity Soil Activity Soil Sample ID pCi/g Detected Sample Sample ID pCi/g Detected Sample L4BKG01BJGSSSA01 2.61E03 NO SSS L4BKG01BJGSBSA01 1.98E02 NO SSB L4BKG01QJGSSSA01 2.49E02 NO SSS L4BKG01QJGSBSA01 2.19E02 NO SSB L4BKG01BJGSSSA02 1.37E01 YES SSS L4BKG01BJGSBSA02 1.59E02 NO SSB L4BKG01BJGSSSA03 8.32E02 YES SSS L4BKG01BJGSBSA03 1.20E02 NO SSB L4BKG01BJGSSSA04 1.23E01 YES SSS L4BKG01BJGSBSA04 1.94E02 NO SSB L4BKG01BJGSSSA05 1.72E01 YES SSS L4BKG01BJGSBSA05 6.27E03 NO SSB L4BKG01BJGSSSA06 4.97E01 YES SSS L4BKG01BJGSBSA06 4.61E03 NO SSB L4BKG01BJGSSSA07 3.34E01 YES SSS L4BKG01BJGSBSA07 5.09E03 NO SSB L4BKG01BJGSSSA08 1.22E02 NO SSS L4BKG01BJGSBSA08 6.13E03 NO SSB L4BKG01BJGSSSA09 2.66E01 YES SSS L4BKG01BJGSBSA09 3.70E03 NO SSB L4BKG01BJGSSSA10 1.94E01 YES SSS L4BKG01BJG5BSA10 2.22E02 NO SSB L4BKG01BJGSSSA11 1.51E01 YES SSS L4BKG01BJGSBSA11 1.10E02 NO SSB L4BKG01BJGSSSA12 3.12E01 YES SSS L4BKG01BJGSBSA12 1.32E02 NO SSB L4BKG01BJGSSSA13 3.17E01 YES SSS L4BKG01BJGSBSA13 1.13E02 NO SSB L4BKG01BJGSSSA14 1.05E02 NO SSS L4BKG01BJGSBSA14 9.30E03 NO SSB L4BKG01BJGSSSA15 2.80E01 YES SSS L4BKG01BJGSBSA15 2.27E03 NO SSB L4BKG01BJGSSSA16 2.18E01 YES SSS L4BKG01BJGSBSA16 1.05E01 YES SSB L4BKG01QJGSSSA16 7.57E03 NO SSS L4BKG01QJGSBSA16 6.13E03 NO SSB L4BKG01QJGSSSA17 2.52E01 YES SSS L4BKG01BJGSBSA17 4.03E02 YES SSB L4BKG01QJGSSSA18 8.86E02 NO SSS L4BKG01BJGSBSA18 6.63E03 NO SSB L4BKG01QJGSSSA19 8.06E02 YES SSS L4BKGOIBJGSBSA19 5.66E03 NO SSB L4BKG01QJGSSSA20 4.02E01 YES SSS L4BKG01BJG5BSA20 4.67E03 NO SSB L4BKG01QJGSSSA21 6.51E01 YES SSS L4BKG01BJGSBSA21 1.26E03 NO SSB L4BKG01BJGSSSA22 2.53E01 YES SSS L4BKG01BJGSBSA22 4.81E03 NO SSB L4BKG01BJGSSSA23 2.25E01 YES SSS L4BKG01BJGSBSA23 2.14E01 YES SSB L4BKG01BJGSSSA24 7.93E03 NO SSS L4BKG01BJGSBSA24 1.62E02 NO SSB L4BKG01BJGSSSA25 2.89E01 YES SSS L4BKG01BJGSBSA2S 1.17E03 NO SSB L4BKG01BJGSSSA26 2.01E01 YES SSS L4BKG01BJGSBSA26 1.54E02 NO SSB L4BKG01BJGSSSA27 2.27E01 YES SSS L4BKG01BJGSBSA27 1.07E01 YES SSB L4BKG01BJGSSSA28 2.41E01 YES SSS L4BKG01BJGSBSA28 2.41E01 YES SSB L4BKG01BJGSSSA29 2.77E01 YES SSS L4BKG01BJGSBSA29 4.50E02 NO SSB L4BKG01BJGSSSA30 2.60E01 YES SSS L4BKG01BJGSBSA30 1.61E02 NO SSB When the Hosah Park data is sorted by the Cs-137 activity in pCi/g and assigned a rank order, the resulting plot shows several background distributions as seen in Figure 14. A frequency plot of the data, provided as Figure 15, also shows several background distributions.

EH&S TSD # 13-004 Revision 00 Page 18 of 38 Rank Order Plot All Hosah Park Cs137 Result pCi/g 7.00E01 6.00E01 5.00E01 All Hosa Cs137 Result pCi/g 4.00E01 3.00E01 2.00E01 1.00E01 0.00E+00 0 10 20 30 40 50 60 70 1.00E01 Figure 14 - Rank Order Plot of All Hosah Park Cs-137 Soil Sample Results in pCi/g Frequency Plot All Hosah Park Cs137 Results pCi/g 35 30 25 20 Frequency 15 10 5

0 0.10 0.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70 pCi/g Figure 15 - Frequency Plot of All Hosah Park Cs-137 Soil Sample Results The Hosah Park concentrations align well with the decay corrected Brunner Creek concentrations for undisturbed forest and pasture soils and disturbed corn and alfalfa field data in Table 1. As expected the range and distribution of the subsurface 30 - 45 cm Cs-137 concentrations (Figure 17) is lower than the 0-15 cm surface samples (Figure 16).

EH&S TSD # 13-004 Revision 00 Page 19 of 38 Frequency Plot Hosah Park Surface Soil Samples Cs137 pCi/g 8

Undisturbed Frequency 7

6 Disturbed 5

4 Bulk Density, Organic Content and Drainage 3 Areas 2

1 0

0.10 0.00 0.10 0.20 0.30 0.40 0.50 0.60 pCi/g Figure 16 - Frequency Plot of Hosah Park Cs-137 Surface Soil Sample Results Frequency Plot Subsurface Hosah Park Cs137 Results pCi/g 16 14 Frequency 12 10 8

6 4

2 0

0.05 0.00 0.05 0.10 0.15 0.20 0.25 0.30 2

pCi/g Figure 17 - Frequency Plot of Hosah Park Cs-137 Subsurface Soil Sample Results The surface sample results are indicative of a lower disturbed soil concentration mingled with a higher undisturbed concentration that ranges out to just over twice the Undisturbed mean concentration of 0.3 pCi/g. This is consistent with the ranges relative to the mean reported for

EH&S TSD # 13-004 Revision 00 Page 20 of 38 the residential soils [3]and agrarian soils at Brunner Creek [6]. The overall surface sample data had a mean Cs-137 concentration of 0.211 pCi/g and a standard deviation of 0.148 reflecting the overall mean and standard deviation for disturbed and undisturbed soils. When only positively identified results that were above the two sigma error and minimum detectable activity (MDA) were included in the sample set the mean concentration was 0.26 pCi/g, a standard deviation of 0.13 pCi/g and an upper confidence level of 0.31 pCi/g were calculated for the positive results. The report concluded that individual activity concentrations as high as 0.74 pCi/g (e.g., 6.51E-1 pCi/g maximum + 2 error 8.77-E-2 pCi/g) for Cs-137 in undisturbed surface soil would not be unexpected. This is in the range of the Brunner Creek forest and pasture maximum undisturbed surface soil sample data in Table 1 but is lower than the maximum concentration observed in the marsh samples (up to 1.3 pCi/g) and sediment sample (up to 0.9 pCi/g). It is also lower than the undisturbed soil data 95% confidence level for Luzerne County PA in Figure 10 of 1.3 pCi/g for 0 - 10 cm of undisturbed non-drainage area samples. Although the Hosah Park data set fits well within the expected soil concentration from fallout Cs-137 from the residential soils [3]and the Brunner Creek [6] data, undisturbed forested soils could be expected to have 0 - 15 cm average concentration of 1 to 2 pCi/g and drainage areas could have concentrations of 3 to 6 pCi/g as seen in Figure 10.

The Zion Background reference area study [8] consisted of a description of the survey activities performed and their results in order to assess the levels of natural radioactivity within the environment and building materials at the Zion Nuclear Power Station. The materials of concern were asphalt, concrete and soil. The focus included the unconditional release and potential re-use of concrete and soils originating at the Zion Nuclear Power Station as backfill materials. The soil Cs-137 sample data from the study was examined for this TSD. The study focused on areas north and northwest of the Zion Unit 1 and 2 plant area as shown in Figure

18. The Cs-137 sample surface (SSS) and subsurface (SSB) results are summarized in Table 3.

Table 3 - Energy Solutions Background Reference Study Soil sample Results Cs-137 Result Sample Positive Study Sample pCi/g Type ID ES Ref ZBKGSOILDP01 1.54E02 SSB NO ES Ref ZBKGSOILDP02 1.23E02 SSB NO ES Ref ZBKGSOILDP03 6.58E03 SSB NO ES Ref ZBKGSOILDP04 9.48E03 SSB NO ES Ref ZBKGSOILDP05 3.47E02 SSB NO ES Ref ZBKGSOILDP06 4.71E03 SSB NO ES Ref ZBKGSOILDP07 2.80E03 SSB NO ES Ref ZBKGSOILDP08 1.46E02 SSB NO ES Ref ZBKGSOILDP09 1.48E02 SSB NO ES Ref ZBKGSOILDP10 1.83E02 SSB NO ES Ref ZBKGSOILDP11 4.04E03 SSB NO ES Ref ZBKGSOILDP12 8.59E03 SSB NO ES Ref ZBKGSOILDP13 1.10E02 SSB NO ES Ref ZBKGSOILDP14 3.91E02 SSB NO ES Ref ZBKGSOILDP15 2.14E02 SSB NO ES Ref ZBKGSOILSF01 1.05E02 SSS NO

EH&S TSD # 13-004 Revision 00 Page 21 of 38 Cs-137 Result Sample Positive Study Sample pCi/g Type ID ES Ref ZBKGSOILSF02 8.53E03 SSS NO ES Ref ZBKGSOILSF03 2.82E02 SSS NO ES Ref ZBKGSOILSF04 1.27E02 SSS NO ES Ref ZBKGSOILSF05 6.60E02 SSS YES ES Ref ZBKGSOILSF06 1.84E03 SSS NO ES Ref ZBKGSOILSF07 9.25E03 SSS NO ES Ref ZBKGSOILSF08 1.17E02 SSS NO ES Ref ZBKGSOILSF09 6.62E03 SSS NO ES Ref ZBKGSOILSF10 1.49E02 SSS NO ES Ref ZBKGSOILSF11 5.31E03 SSS NO ES Ref ZBKGSOILSF12 9.79E03 SSS NO ES Ref ZBKGSOILSF13 2.93E02 SSS NO ES Ref ZBKGSOILSF14 1.13E02 SSS NO ES Ref ZBKGSOILSF15 3.82E03 SSS NO Figure 18 - Reference Study Area [8] (Soil Location Marked in Blue)

EH&S TSD # 13-004 Revision 00 Page 22 of 38 The frequency plot Figure 19 of the Table 3 data for the Energy Solutions reference background study [8] indicates several background Cs-137 distributions that are an order of magnitude lower than the Hosah Park data in Figure 15, Figure 16, and Figure 17. This indicates that the sample area was highly disturbed soil with much lower overall Cs-137 concentrations from fallout.

Frequency Plot All ES Reference Study Cs137 Soil Results Frequency 7.00 6.00 5.00 4.00 3.00 2.00 1.00 0.00 4.00E02 2.00E02 0.00E+00 2.00E02 4.00E02 6.00E02 8.00E02 1.00 Figure 19- Frequency Plot of All Energy Solution Reference Background Study Soil Cs-137 Results It is not surprising that the Energy Solutions Reference Area has lower overall Cs-137 concentrations than the Hosah Park data given the sampling locations proximity to site structures and roads.

The Hosah Park and Energy Solutions sample data is representative of well drained disturbed and undisturbed soils adjacent to the Lake. As noted in the residential area and Brunner Creek soil study results, these locations are not necessarily indicative of the Cs-137 levels that would be expected in drainage areas, wetlands, or undisturbed forest areas of the Zion Station property where characterization measurements will be conducted.

Extensive soil sampling has also been conducted to date in ISFSI impacted MARSSIM Class 3 areas and adjacent ISFSI in survey units 10218, 10219, 10220, 10221. Results from these additional study areas and the Hosah Park and Energy Solutions Reference Background Study are provided in Attachment B and comprise a Zion Facility on-site sample set of 635 surface (0-15 cm) and subsurface (30-45 cm) soil sample results.

EH&S TSD # 13-004 Revision 00 Page 23 of 38 Figure 20 - Site Class 1 through 3 Survey Units Showing ISFSI Area 10218 and Adjacent Survey Units The overall sample results range from a non-detect of -9.86E-3 pCi/g for sample L310218CJGSSB-C003 from Survey Unit 10218 to 1.14 pCi/g for sample L310220CIGSSSC017 of Bull Creek sediment in survey Unit 10220. It should be noted that this is within the range of the Cs-137 anticipated fallout levels in the 40 to 50 degrees north latitude region based upon the residential soil [3] Figure 10 and decay corrected Brunner Creek [6] data Table 1.

As seen in Figure 21 the 635 sample data set is heavily weighted to results at the lower end of the spectrum which is indicative of non-detected sample results or very low results that correspond to undisturbed subsurface soils or highly disturbed surface and subsurface soils. Of the 635 sample results 177 had detectable Cs-137 concentrations that exceeded both the MDA and 2 sigma error associated with the measurement. The frequency plot of the positive identification results is provided as Figure 22.

EH&S TSD # 13-004 Revision 00 Page 24 of 38 Figure 21 - Frequency Plot of All 635 Soil Sample Cs-137 Results Figure 22 - Frequency Plot of 177 Soils Samples with Positive Identification of Cs-137 Most undisturbed subsurface soil has undetectable levels of Cs-137 at the 30 to 45 cm depth.

As seen in Figure 22 the bulk of the soil sample results to date are indicative of disturbed soils

EH&S TSD # 13-004 Revision 00 Page 25 of 38 since most areas sampled are in the vicinity of the facility rather than at remote locations on the property. Some data indicates that the results are from undisturbed soils in the 0.2 to 1 pCi/g range indicative of non-drainage soils similar to the Hosah Park data shown in Figure 16. As seen in Figure 23 the bias created by a preponderance of data lacking positive Cs-137 identification and with disturbed soil results artificially weights the data set to levels that are well below the 95% confidence levels reported in residential soils (Figure 7, Figure 8, Figure 9, Figure 10) and the range of Cs-137 concentrations observed in surface samples in the environment such as those from Brunner Creek Table 1.

Figure 23 - Empirical Fit of All Soil Sample Data Surface and Subsurface Using Model Risk Software Given the lack of ZionSolutions sample results from undisturbed drainage and non-drainage areas and that all sample data to date aligns well with observed fallout Cs-137 background concentrations, the decay corrected 0-10 cm 95% confidence values for the Luzerne County, PA - Cesium-137 in Soil Summary Data and Statistics Disturbed and Undisturbed Soils in Figure 10 can be used to identify Cs-137 concentrations that are outside the range of fallout background. As noted in the text below Figure 5, the residential soil study data [3] was decay corrected to 1991. The Figure 10 values were decay corrected for 22.4 years of decay from January 1, 1991 to June 1, 2013. The upper bound of the decay corrected 95% confidence Cs-137 concentrations are shown in the last column of Table 5 - Decay Corrected Luzerne County PA Summary Data for Disturbed and Undisturbed Soils at 0 - 10 cm.

EH&S TSD # 13-004 Revision 00 Page 26 of 38 Table 4 - Original Luzerne County PA Summary Data for Disturbed and Undisturbed Soils at 0 -

10 cm Original Data Condition Number Arithmetic Geometric Range (pCi/g)

& Depth of Measured Mean (pCi/g) Mean for 95% of (cm) Samples Range pCi/g +/- (1 sigma) (pCi/g) Distribution Drainage Areas Surface 0-10 cm Undisturbed 6 0 - 4.7 2.4 1.4 2.1 0.75 -

+/- 6.1 Disturbed 4 0 - 2.8 3.9 +/- 0.81 1.7 0.59 - 4.8 Non-Drainage Areas Surface 0-10 cm Undisturbed 6 0.39 - 1.1 0.61 0.26 0.57 0.26 -

+/- 1.3 Disturbed 2 0.45 - 0.57 0.51 0.08 0.51 0.39 -

+/- 0.7 Table 5 - Decay Corrected Luzerne County PA Summary Data for Disturbed and Undisturbed Soils at 0 - 10 cm Decay Corrected Data Condition Number Arithmetic Geometric Range (pCi/g)

& Depth of Measured Mean (pCi/g) +/- Mean for 95% of (cm) Samples Range pCi/g (1 sigma) (pCi/g) Distribution Drainage Areas Surface 0-10 cm Undisturbed 6 -

0 2.80 1.43 +/- 0.83 1.25 0.45 - 3.63 Disturbed 4 0 - 1.67 2.32 +/- 0.48 1.01 0.35 - 2.86 Non-Drainage Areas Surface 0-10 cm Undisturbed 6 0.23 - 0.66 0.36 +/- 0.15 0.34 0.15 - 0.77 Disturbed 2 0.27 - 0.34 0.30 +/- 0.05 0.30 0.23 - 0.42 The decay corrected upper 95% value of the distribution in Table 5 can be used to identify Cs-137 concentrations that are outside the range of expected soil concentrations due to world-wide fallout.

6.0 Conclusion The soil sample data indicates that the majority of the Class 3 area soil samples are from disturbed soils. The Hosah Park data [7] and overall sample data fit well with fallout levels predicted using the decay corrected Brunner Creek [6] study data and the decay corrected residential soils study of background levels in New York, Massachusetts, and Pennsylvania

[3]. Given this the Table 5 - Decay Corrected Luzerne County PA Summary Data for Disturbed and Undisturbed Soils at 0 - 10 cm upper 95th percentile levels for drainage and non-drainage, disturbed and undisturbed soil Cs-137 levels should be used as investigation levels for non-impacted, and Class 2 and 3 land area survey units. The investigation levels should be specified in the Survey Plan, Survey Package or Work Plan.

7.0 Attachments

EH&S TSD # 13-004 Revision 00 Page 27 of 38 7.1 Attachment A - Zion Site Layout with Future ISFSI Location 7.2 Attachment B - All Soil Sample Results Background Studies and Class 3 Southwest Survey Units 8.0 References

[1] "DTBD-06-003, Revision No. 0, Use of In Situ Gamma Spectroscopy for Final Site Survey, Rancho Seco Nuclear Generating Station Decommissioning Technical Basis Document, May 26, 2006".

[2] "Historical Overview of Atmospheric Nuclear Weapons Testing and Estimates of Fallout In the Continental United States, Harold L. Beck and Burton G. Bennett, Health Physics, Vol. 82, No. 5, May 2002.".

[3] "Investigations of Natural Variations of Cesium137 Concentrations In Residential Soils, Prepared for the Health Physics Society 39th Annual Meeting Student III -

Environmental and Radon Session June 28, 1994".

[4] "Tracking the Fukushima Radionuclides, Naohiro Yoshida and Jota Kanda, Science 336, 1115 (2012); June 1, 2012".

[5] "UNSCEAR 2000 Report Vol. I, Sources and Effects of Ionizing Radiation, Annex C, Exposures to the public from man-made sources of radiation, 2000.".

[6] "Redistribution of Fallout 137Cs In Brunner Creek Watershed In Wisconsin, Jerry C.

Ritchie, J. Roger McHenry, and Gary D. Bubenzer USDA-ARS, Beltsville, MD, and Durant, OK and the University of Wisconsin-Madison, WI, 1982".

[7] "Determination of Radionuclide Activity Concentrations In Soils In Non-Impacted Soils Adjacent to the Zion Nuclear Station, July 26, 2012".

[8] "CS-RS-PN-028, Revision 0, Background Reference Area Report Zion Nuclear Power Station Zion, I, February 7, 2012".

Attachment A EH&S TSD # 13-004 Revision 00 Zion Site Layout with Future ISFSI Location Page 28 of 38

Attachment B EH&S TSD # 13-004 Revision 00 All Soil Sample Results Background Studies and Class 3 Southwest Survey Units Page 29 of 38 Cs137 Cs137 Result Sample Positive Result Sample Positive Study Sample ID pCi/g Type ID Study Sample ID pCi/g Type ID Hosah L4BKG01BJGSSSA01 2.61E03 SSS NO Hosah L4BKG01BJGSBSA06 4.61E03 SSB NO Hosah L4BKG01QJGSSSA01 2.49E02 SSS NO Hosah L4BKG01BJGSBSA07 5.09E03 SSB NO Hosah L4BKG01BJGSSSA02 1.37E01 SSS YES Hosah L4BKG01BJGSBSA08 6.13E03 SSB NO Hosah L4BKG01BJGSSSA03 8.32E02 SSS YES Hosah L4BKG01BJGSBSA09 3.70E03 SSB NO Hosah L4BKG01BJGSSSA04 1.23E01 SSS YES Hosah L4BKGOIBJG5BSA10 2.22E02 SSB NO Hosah L4BKG01BJGSSSA05 1.72E01 SSS YES Hosah L4BKG01BJGSBSA11 1.10E02 SSB NO Hosah L4BKG01BJGSSSA06 4.97E01 SSS YES Hosah L4BKG01BJGSBSA12 1.32E02 SSB NO Hosah L4BKG01BJGSSSA07 3.34E01 SSS YES Hosah L4BKG01BJGSBSA13 1.13E02 SSB NO Hosah L4BKG01BJGSSSA08 1.22E02 SSS NO Hosah L4BKG01BJGSBSA14 9.30E03 SSB NO Hosah L4BKG01BJGSSSA09 2.66E01 SSS YES Hosah L4BKG01BJGSBSA15 2.27E03 SSB NO Hosah L4BKG01BJGSSSA10 1.94E01 SSS YES Hosah L4BKG01BJGSBSA16 1.05E01 SSB YES Hosah L4BKG01BJGSSSA11 1.51E01 SSS YES Hosah L4BKG01QJGSBSA16 6.13E03 SSB NO Hosah L4BKG01BJGSSSA12 3.12E01 SSS YES Hosah L4BKG01BJGSBSA17 4.03E02 SSB YES Hosah L4BKG01BJGSSSA13 3.17E01 SSS YES Hosah L4BKG01BJGSBSA18 6.63E03 SSB NO Hosah L4BKG01BJGSSSA14 1.05E02 SSS NO Hosah L4BKGOIBJGSBSA19 5.66E03 SSB NO Hosah L4BKG01BJGSSSA15 2.80E01 SSS YES Hosah L4BKG01BJG5BSA20 4.67E03 SSB NO Hosah L4BKG01BJGSSSA16 2.18E01 SSS YES Hosah L4BKG01BJGSBSA21 1.26E03 SSB NO Hosah L4BKG01QJGSSSA16 7.57E03 SSS NO Hosah L4BKGOiBJGSBSA22 4.81E03 SSB NO Hosah L4BKG01QJGSSSA17 2.52E01 SSS YES Hosah L4BKGOiBJGSBSA23 2.14E01 SSB YES Hosah L4BKG01QJGSSSA18 8.86E02 SSS NO Hosah L4BKGOiBJGSBSA24 1.62E02 SSB NO Hosah L4BKG01QJGSSSA19 8.06E02 SSS YES Hosah L4BKGOiBJGSBSA2S 1.17E03 SSB NO Hosah L4BKG01QJGSSSA20 4.02E01 SSS YES Hosah L4BKGOiBJGSBSA26 1.54E02 SSB NO Hosah L4BKG01QJGSSSA21 6.51E01 SSS YES Hosah L4BKGOiBJGSBSA27 1.07E01 SSB YES Hosah L4BKG01BJGSSSA22 2.53E01 SSS YES Hosah L4BKG01BJGSBSA28 2.41E01 SSB YES Hosah L4BKG01BJGSSSA23 2.25E01 SSS YES Hosah L4BKG01BJGSBSA29 4.50E02 SSB NO Hosah L4BKG01BJGSSSA24 7.93E03 SSS NO Hosah L4BKGOiBJGSBSA30 1.61E02 SSB NO Hosah L4BKG01BJGSSSA25 2.89E01 SSS YES Hosah L4BKG01BJGSBSA02 1.59E02 SSB NO Hosah L4BKG01BJGSSSA26 2.01E01 SSS YES Hosah L4BKG01BJGSBSA03 1.20E02 SSB NO Hosah L4BKG01BJGSSSA27 2.27E01 SSS YES Hosah L4BKG01BJGSBSA04 1.94E02 SSB NO Hosah L4BKG01BJGSSSA28 2.41E01 SSS YES Hosah L4BKG01BJGSBSA05 6.27E03 SSB NO Hosah L4BKG01BJGSSSA29 2.77E01 SSS YES ES Ref ZBKGSOILDP01 1.54E02 SSB NO Hosah L4BKG01BJGSSSA30 2.60E01 SSS YES ES Ref ZBKGSOILDP02 1.23E02 SSB NO Hosah L4BKG01BJGSBSA01 1.98E02 SSB NO ES Ref ZBKGSOILDP03 6.58E03 SSB NO Hosah L4BKG01QJGSBSA01 2.19E02 SSB NO ES Ref ZBKGSOILDP04 9.48E03 SSB NO

Attachment B EH&S TSD # 13-004 Revision 00 All Soil Sample Results Background Studies and Class 3 Southwest Survey Units Page 30 of 38 Cs137 Cs137 Result Sample Positive Result Sample Positive Study Sample ID pCi/g Type ID Study Sample ID pCi/g Type ID ES Ref ZBKGSOILDP05 3.47E02 SSB NO ISFSI VCCSYSTA018SS 2.97E02 SSB YES ES Ref ZBKGSOILDP06 4.71E03 SSB NO ISFSI VCCSYSTA019SS 3.17E03 SSB NO ES Ref ZBKGSOILDP07 2.80E03 SSB NO ISFSI VCCSYSTA020SS 3.24E03 SSB NO ES Ref ZBKGSOILDP08 1.46E02 SSB NO ISFSI VCCSYSTA021SS 1.13E02 SSB NO ES Ref ZBKGSOILDP09 1.48E02 SSB NO ISFSI VCCSYSTA022SS 3.22E02 SSB NO ES Ref ZBKGSOILDP10 1.83E02 SSB NO ISFSI VCCSYSTA023SS 1.68E02 SSB NO ES Ref ZBKGSOILDP11 4.04E03 SSB NO ISFSI VCCSYSTA024SS 2.57E02 SSB YES ES Ref ZBKGSOILDP12 8.59E03 SSB NO ISFSI VCCSYSTA025SS 2.36E03 SSB NO ES Ref ZBKGSOILDP14 3.91E02 SSB NO ISFSI L310218CSGSSBA001 3.08E02 SSB YES ES Ref ZBKGSOILDP15 2.14E02 SSB NO ISFSI L310218CSGSSBA002 4.62E03 SSB NO ES Ref ZBKGSOILSF01 1.05E02 SSS NO ISFSI L310218CSGSSBA003 3.07E03 SSB NO ES Ref ZBKGSOILSF02 8.53E03 SSS NO ISFSI L310218CSGSSBA004 7.96E02 SSB YES ES Ref ZBKGSOILSF03 2.82E02 SSS NO ISFSI L310218CSGSSBA005 3.23E02 SSB YES ES Ref ZBKGSOILSF04 1.27E02 SSS NO ISFSI L310218CSGSSBA006 3.41E03 SSB NO ES Ref ZBKGSOILSF05 6.60E02 SSS YES ISFSI L310218CSGSSBA007 2.75E04 SSB NO ES Ref ZBKGSOILSF06 1.84E03 SSS NO ISFSI L310218CSGSSBA008 1.57E02 SSB NO ES Ref ZBKGSOILSF07 9.25E03 SSS NO ISFSI L310218CSGSSBB005 2.25E03 SSB NO ES Ref ZBKGSOILSF08 1.17E02 SSS NO ISFSI L310218CSGSSBB006 8.73E04 SSB NO ES Ref ZBKGSOILSF09 6.62E03 SSS NO ISFSI L310218CSGSSBB002 1.62E03 SSB NO ES Ref ZBKGSOILSF10 1.49E02 SSS NO ISFSI L310218CSGSSBB003 1.82E02 SSB NO ES Ref ZBKGSOILSF11 5.31E03 SSS NO ISFSI L310218CSGSSBB007 3.12E02 SSB YES ES Ref ZBKGSOILSF12 9.79E03 SSS NO ISFSI L310218CSGSSBB001 6.95E02 SSB YES ES Ref ZBKGSOILSF13 2.93E02 SSS NO ISFSI L310218CSGSSBB004 7.37E02 SSB YES ES Ref ZBKGSOILSF14 1.13E02 SSS NO ISFSI L310218CSGSSBB025 3.00E02 SSB YES ES Ref ZBKGSOILSF15 3.82E03 SSS NO ISFSI L310218CSGSSBB026 6.86E03 SSB NO ISFSI L310218CSGSSBB009 6.54E02 SSB YES ISFSI L310218CSGSSBB027 3.39E02 SSB YES ISFSI L310218CSGSSBB010 6.20E03 SSB NO ISFSI L310218CSGSSBB029 8.91E03 SSB NO ISFSI L310218CSGSSBB011 1.26E02 SSB NO ISFSI L310218CSGSSBB030 9.28E03 SSB NO ISFSI L310218CDGSSBB011 1.33E02 SSB NO ISFSI L310218CSGSSBA017 5.64E02 SSB YES ISFSI L310218CSGSSBB012 8.03E03 SSB NO ISFSI L310218CSGSSBA018 4.20E03 SSB NO ISFSI L310218CSGSSBB013 1.18E02 SSB NO ISFSI L310218CSGSSBA019 2.00E02 SSB NO ISFSI L310218CSGSSBB014 6.28E02 SSB YES ISFSI L310218CDGSSBA019 6.95E03 SSB NO ISFSI L310218CSGSSBB015 2.61E04 SSB NO ISFSI L310218CSGSSBA020 4.87E02 SSB YES ISFSI L310218CSGSSBB016 1.78E02 SSB NO ISFSI L310218CSGSSBA021 3.64E03 SSB NO

Attachment B EH&S TSD # 13-004 Revision 00 All Soil Sample Results Background Studies and Class 3 Southwest Survey Units Page 31 of 38 Cs137 Cs137 Result Sample Positive Result Sample Positive Study Sample ID pCi/g Type ID Study Sample ID pCi/g Type ID ISFSI L310218CDGSSBA021 1.85E02 SSB NO ISFSI VCCSYSTA012SS 5.07E03 SSB NO ISFSI L310218CSGSSBA022 3.12E02 SSB NO ISFSI VCCSYSTA015SS 8.69E03 SSB NO ISFSI L310218CSGSSBB017 6.30E03 SSB NO ISFSI VCCSYSTA011SS 1.53E02 SSB NO ISFSI L310218CSGSSBB018 2.98E02 SSB YES ISFSI VCCSYSTA009SS 2.11E02 SSB NO ISFSI L310218CSGSSBB019 9.49E03 SSB NO ISFSI VCCSYSTA016SS 2.44E02 SSB NO ISFSI L310218CSGSSBB021 3.10E02 SSB NO ISFSI VCCSYSTA014SS 2.70E02 SSB NO ISFSI L310218CSGSSBB022 2.27E02 SSB NO ISFSI VCCSYSTA010SS 5.61E02 SSB YES ISFSI L310218CSGSSBB023 7.67E02 SSB YES ISFSI VCCSYSTA017SS 1.25E02 SSB NO ISFSI L310218CSGSSBA025 1.92E02 SSB NO ISFSI L310218CJGSSBC004 9.11E04 SSB NO ISFSI L310218CSGSSBA026 5.51E03 SSB NO ISFSI L310218CJGSSBC005 8.91E04 SSB NO ISFSI L310218CSGSSBA010 3.35E03 SSB NO ISFSI L310218CJGSSBC004 2.34E03 SSB NO ISFSI L310218CSGSSBA030 1.45E03 SSB NO ISFSI VCCSYSTA008SS 1.10E02 SSB NO ISFSI L310218CSGSSBA026 4.85E03 SSB NO ISFSI VCCSYSTA027SS 1.72E02 SSB NO ISFSI L310218CSGSSBA012 5.43E03 SSB NO ISFSI VCCSYSTA026SS 3.07E02 SSB YES ISFSI L310218CSGSSBA028 1.43E02 SSB NO ISFSI L310218CJGSSBC006 3.16E02 SSB YES ISFSI L310218CSGSSBA011 1.45E02 SSB NO ISFSI VCCSYSTA029SS 1.56E02 SSB NO ISFSI L310218CSGSSBA027 1.52E02 SSB NO ISFSI VCCSPL1A029SS 8.50E04 SSB NO ISFSI L310218CSGSSBA013 5.42E02 SSB YES ISFSI VCCSYSTA030SS 5.20E03 SSB NO ISFSI L310218CSGSSBA009 6.95E02 SSB YES ISFSI L310218CDGSSBB024 2.51E02 SSB NO ISFSI L310218CJGSSBC002 8.38E03 SSB NO ISFSI L310218CSGSSBB024 1.40E02 SSB NO ISFSI L310218CJGSSBC001 2.77E03 SSB NO ISFSI L310218CSGSSBB008 5.84E03 SSB NO ISFSI L310218CJGSSBC003 9.86E03 SSB YES ISFSI L310218CSGSSBA029 4.55E03 SSB NO ISFSI L310218CSGSSBA014 1.96E02 SSB NO ISFSI L310218CSGSSBB020 8.35E03 SSB NO ISFSI L310218CSGSSBA015 2.93E02 SSB YES ISFSI L310218CSGSSBA023 1.94E02 SSB NO ISFSI L310218CSGSSBA016 5.55E02 SSB YES ISFSI L310218IIGSSBA003 1.99E02 SSB NO ISFSI VCCSYSTA007SS 7.48E03 SSB NO ISFSI L310218CSGSSBB028 2.56E02 SSB NO ISFSI VCCSYSTA005SS 1.62E03 SSB NO ISFSI L310218CSGSSSB009 9.23E02 SSS YES ISFSI VCCSYSTA004SS 4.89E03 SSB NO ISFSI L310218CSGSSSB009 3.38E02 SSS YES ISFSI VCCSYSTA001SS 3.12E02 SSB YES ISFSI L310218CSGSSSB010 2.14E02 SSS NO ISFSI VCCSYSTA003SS 3.49E02 SSB YES ISFSI L310218CSGSSSB011 7.77E02 SSS YES ISFSI VCCSYSTA006SS 5.03E02 SSB YES ISFSI L310218CSGSSSB012 3.45E03 SSS NO ISFSI VCCSPL1A002SS 6.27E02 SSB YES ISFSI L310218CSGSSSB013 5.17E02 SSS YES ISFSI VCCSYSTA002SS 8.45E02 SSB YES ISFSI L310218CSGSSSB014 8.05E02 SSS YES ISFSI VCCSYSTA013SS 2.60E03 SSB NO ISFSI L310218CSGSSSB015 7.03E03 SSS NO

Attachment B EH&S TSD # 13-004 Revision 00 All Soil Sample Results Background Studies and Class 3 Southwest Survey Units Page 32 of 38 Cs137 Cs137 Result Sample Positive Result Sample Positive Study Sample ID pCi/g Type ID Study Sample ID pCi/g Type ID ISFSI L310218CSGSSSB016 7.00E02 SSS YES ISFSI L310218CSGSSSB030 1.37E02 SSS NO ISFSI VCCSYSTA018SF 8.51E03 SSS NO ISFSI L310218CDGSSSB030 8.06E03 SSS NO ISFSI VCCSYSTA018SF 1.73E02 SSS NO ISFSI L310218CSGSSSA017 2.73E02 SSS YES ISFSI VCCSYSTA019SF 7.32E03 SSS NO ISFSI L310218CSGSSSA017 4.57E02 SSS YES ISFSI VCCSYSTA020SF 2.86E02 SSS NO ISFSI L310218CSGSSSA018 3.04E02 SSS NO ISFSI VCCSYSTA021SF 1.77E02 SSS NO ISFSI L310218CSGSSSA019 6.53E04 SSS NO ISFSI VCCSYSTA022SF 1.80E02 SSS NO ISFSI L310218CSGSSSA020 1.06E02 SSS NO ISFSI VCCSYSTA023SF 7.90E03 SSS NO ISFSI L310218CSGSSSA021 7.83E02 SSS YES ISFSI VCCSYSTA024SF 3.32E02 SSS YES ISFSI L310218CSGSSSA022 2.02E02 SSS NO ISFSI VCCSYSTA025SF 2.95E03 SSS NO ISFSI L310218CDGSSSA022 1.17E02 SSS NO ISFSI L310218CSGSSSA001 2.59E02 SSS YES ISFSI L310218CSGSSSB017 8.02E02 SSS YES ISFSI L310218CSGSSSA001 2.05E02 SSS NO ISFSI L310218CSGSSSB017 8.41E02 SSS YES ISFSI L310218CSGSSSA002 5.86E02 SSS YES ISFSI L310218CSGSSSB018 1.16E02 SSS NO ISFSI L310218CSGSSSA003 1.90E02 SSS NO ISFSI L310218CSGSSSB019 5.19E02 SSS YES ISFSI L310218CDGSSSA003 4.64E02 SSS YES ISFSI L310218CSGSSSB021 2.34E02 SSS NO ISFSI L310218CSGSSSA004 4.14E02 SSS YES ISFSI L310218CSGSSSB022 4.35E03 SSS NO ISFSI L310218CSGSSSA005 3.65E02 SSS NO ISFSI L310218CSGSSSB023 2.55E03 SSS NO ISFSI L310218CSGSSSA006 3.60E02 SSS YES ISFSI L310218CSGSSSA024 5.52E02 SSS YES ISFSI L310218CSGSSSA007 8.25E03 SSS NO ISFSI L310218CSGSSSA025 2.86E03 SSS NO ISFSI L310218CSGSSSA008 9.34E03 SSS NO ISFSI L310218CSGSSSA026 7.86E04 SSS NO ISFSI L310218CSGSSSB005 1.74E02 SSS NO ISFSI L310218CSGSSSA028 8.44E03 SSS NO ISFSI L310218CSGSSSB001 3.12E02 SSS NO ISFSI L310218CSGSSSA012 3.57E03 SSS NO ISFSI L310218CSGSSSB001 3.25E02 SSS YES ISFSI L310218CSGSSSA011 1.07E03 SSS NO ISFSI L310218CSGSSSB006 5.27E02 SSS YES ISFSI L310218CSGSSSA010 1.19E02 SSS NO ISFSI L310218CDGSSSB002 7.13E02 SSS YES ISFSI L310218CSGSSSA009 1.49E02 SSS NO ISFSI L310218CSGSSSB007 8.19E02 SSS YES ISFSI L310218CSGSSSA030 2.18E02 SSS YES ISFSI L310218CSGSSSB002 9.08E02 SSS YES ISFSI L310218CSGSSSA027 3.43E02 SSS YES ISFSI L310218CSGSSSB004 1.17E01 SSS YES ISFSI L310218CSGSSSA013 4.13E02 SSS YES ISFSI L310218CSGSSSB003 3.07E01 SSS YES ISFSI L310218CJGSSSC003 5.62E03 SSS NO ISFSI L310218CSGSSSB025 6.81E04 SSS NO ISFSI L310218CJGSSSC001 2.72E04 SSS NO ISFSI L310218CSGSSSB025 3.60E03 SSS NO ISFSI L310218CJGSSSC002 2.61E03 SSS NO ISFSI L310218CSGSSSB026 1.34E03 SSS NO ISFSI L310218CSGSSSA016 1.97E02 SSS NO ISFSI L310218CSGSSSB027 8.50E04 SSS NO ISFSI L310218CJGSSSC004 2.22E02 SSS YES ISFSI L310218CSGSSSB029 2.91E02 SSS YES ISFSI L310218CSGSSSA014 2.64E02 SSS NO

Attachment B EH&S TSD # 13-004 Revision 00 All Soil Sample Results Background Studies and Class 3 Southwest Survey Units Page 33 of 38 Cs137 Cs137 Result Sample Positive Result Sample Positive Study Sample ID pCi/g Type ID Study Sample ID pCi/g Type ID ISFSI L310218CSGSSSA015 2.88E02 SSS NO ISFSI L310218CSGSSSB024 2.97E02 SSS YES ISFSI L310218CSGSSSA014 3.16E02 SSS YES ISFSI L310218CSGSSSB008 3.56E02 SSS NO ISFSI VCCSYSTA004SF 2.80E02 SSS NO ISFSI L310218CSGSSSB020 4.10E02 SSS YES ISFSI VCCSYSTA006SF 2.21E03 SSS NO ISFSI L310218CSGSSSB028 4.65E02 SSS YES ISFSI VCCSYSTA007SF 2.20E04 SSS NO ISFSI L310218IIGSSSA002 1.09E01 SSS YES ISFSI VCCSYSTA002SF 2.12E03 SSS NO ISFSI L310218IIGSSSA001 1.16E01 SSS YES ISFSI VCCSYSTA005SF 3.38E03 SSS NO SW L310220CJGSSSB001 2.74E01 SSB YES ISFSI VCCSYSTA001SF 9.04E03 SSS NO SW L310220CJGSSSB002 1.02E01 SSB YES ISFSI VCCSYSTA003SF 1.41E02 SSS NO SW L310220CJGSSSB003 1.30E01 SSB YES ISFSI VCCSPL1A002SF 2.43E02 SSS NO SW L310220CJGSSSB004 3.18E02 SSS NO ISFSI VCCSYSTA001SF 2.85E02 SSS YES SW L310220CJGSSSB005 6.57E02 SSB NO ISFSI VCCSYSTA008SF 1.28E01 SSS YES SW L310220CJGSSSB006 6.84E02 SSB NO ISFSI VCCSYSTA017SF 8.30E03 SSS NO SW L310220CJGSSSB007 3.37E02 SSB NO ISFSI VCCSYSTA014SF 5.49E03 SSS NO SW L310220CJGSSSB008 7.69E02 SSB NO ISFSI VCCSYSTA012SF 3.74E03 SSS NO SW L310220CQGSSSB008 6.77E02 SSB YES ISFSI VCCSYSTA010SF 1.35E03 SSS NO SW L310220CJGSSBB001 5.81E02 SSB NO ISFSI VCCSYSTA011SF 6.64E03 SSS NO SW L310220CJGSSBB002 1.13E01 SSB YES ISFSI VCCSYSTA016SF 7.89E03 SSS NO SW L310220CJGSSBB003 4.09E02 SSS NO ISFSI VCCSYSTA015SF 1.10E02 SSS NO SW L310220CJGSSBB004 1.24E01 SSS YES ISFSI VCCSYSTA009SF 1.66E02 SSS NO SW L310220CJGSSBB005 8.06E04 SSB NO ISFSI VCCSYSTA009SF 2.08E02 SSS NO SW L310220CJGSSBB006 9.77E03 SSS NO ISFSI VCCSYSTA013SF 5.91E02 SSS YES SW L310220CJGSSBB007 4.08E02 SSB NO ISFSI VCCSYSTA027SF 6.62E03 SSS NO SW L310220CJGSSBB008 1.87E02 SSB NO ISFSI VCCSYSTA026SF 6.47E03 SSS NO SW L310220CQGSSBB008 8.98E03 SSB NO ISFSI L310218CJGSSSC005 5.62E04 SSS NO SW L310220CJGSSSA001 3.93E02 SSS NO ISFSI L310218CJGSSSC006 3.19E03 SSS NO SW L310220CJGSSSA002 1.32E02 SSB NO ISFSI VCCSYSTA028SF 5.99E03 SSS NO SW L310220CJGSSSA003 2.54E02 SSS NO ISFSI VCCSPL1A029SF 5.77E03 SSS NO SW L310220CJGSSSA004 2.43E01 SSS YES ISFSI VCCSYSTA030SF 5.41E03 SSS NO SW L310220CJGSSSA005 1.93E01 SSB YES ISFSI VCCSYSTA029SF 2.89E04 SSS NO SW L310220CJGSSSA006 4.91E02 SSS NO ISFSI VCCSYSTA029SF 1.25E02 SSS NO SW L310220CQGSSSA006 5.45E02 SSS NO ISFSI L310218CSGSSSA023 4.09E03 SSS NO SW L310220CJGSSBA001 2.05E02 SSB NO ISFSI L310218CSGSSSA023 8.40E04 SSS NO SW L310220CJGSSBA002 1.42E02 SSS NO ISFSI L310218CSGSSSA029 1.22E02 SSS NO SW L310220CJGSSBA003 7.52E03 SSB NO

Attachment B EH&S TSD # 13-004 Revision 00 All Soil Sample Results Background Studies and Class 3 Southwest Survey Units Page 34 of 38 Cs137 Cs137 Result Sample Positive Result Sample Positive Study Sample ID pCi/g Type ID Study Sample ID pCi/g Type ID SW L310220CJGSSBA004 4.10E02 SSS NO SW L310221CSGSSBA018 2.42E02 SSS NO SW L310220CJGSSBA005 1.10E01 SSS YES SW L310221CSGSSBA019 5.81E03 SSB NO SW L310220CJGSSBA006 2.96E02 SSB NO SW L310221CSGSSBA020 8.22E03 SSB NO SW L310220CQGSSBA006 6.55E03 SSB NO SW L310221CSGSSBA021 2.77E02 SSS NO SW L310220CJGSSSA001 3.37E01 SSB YES SW L310221CSGSSBA022 8.72E03 SSB NO SW L310220CJGSSSA002 1.11E01 SSB NO SW L310221CSGSSBA023 4.70E02 SSB NO SW L310220CJGSSSA003 1.79E01 SSS YES SW L310221CSGSSBA024 1.31E02 SSB NO SW L310220CJGSSSA004 1.20E01 SSB YES SW L310221CSGSSBA025 8.74E03 SSB NO SW L310220CJGSSSA005 1.09E01 SSB YES SW L310221CSGSSBA026 1.43E02 SSB NO SW L310220CQGSSSA005 1.64E01 SSB YES SW L310221CSGSSBA027 3.46E03 SSB NO SW L310220CJGSSBA001 1.48E03 SSB NO SW L310221CSGSSBA028 1.69E02 SSB NO SW L310220CJGSSBA002 1.52E01 SSB YES SW L310221CSGSSBA029 5.33E03 SSS NO SW L310220CJGSSBA003 1.27E01 SSS YES SW L310221CSGSSBA030 8.51E03 SSB NO SW L310220CJGSSBA004 1.90E02 SSS NO SW L310221CQGSSSA001 8.29E03 SSB NO SW L310220CJGSSBA005 2.42E02 SSB NO SW L310221CQGSSSA016 1.79E02 SSB NO SW L310220CQGSSBA005 3.16E03 SSB NO SW L310221CSGSSSA001 1.88E02 SSS NO SW L310221CQGSSBA001 3.03E02 SSB NO SW L310221CSGSSSA002 2.48E03 SSS NO SW L310221CQGSSBA016 1.30E02 SSB NO SW L310221CSGSSSA003 5.03E02 SSB NO SW L310221CSGSSBA001 6.07E02 SSB NO SW L310221CSGSSSA004 4.22E02 SSS NO SW L310221CSGSSBA002 5.28E04 SSS NO SW L310221CSGSSSA005 1.14E02 SSS NO SW L310221CSGSSBA003 4.41E02 SSS YES SW L310221CSGSSSA006 3.98E02 SSB NO SW L310221CSGSSBA004 1.74E02 SSS NO SW L310221CSGSSSA007 2.79E02 SSB NO SW L310221CSGSSBA005 7.05E03 SSS NO SW L310221CSGSSSA008 1.40E03 SSB NO SW L310221CSGSSBA006 1.69E02 SSS NO SW L310221CSGSSSA009 8.10E03 SSB NO SW L310221CSGSSBA007 7.52E04 SSS NO SW L310221CSGSSSA010 2.07E02 SSS NO SW L310221CSGSSBA008 8.18E03 SSB NO SW L310221CSGSSSA011 7.35E03 SSB NO SW L310221CSGSSBA009 2.11E02 SSB NO SW L310221CSGSSSA012 4.90E02 SSS NO SW L310221CSGSSBA011 6.02E04 SSS NO SW L310221CSGSSSA013 1.15E01 SSS YES SW L310221CSGSSBA012 1.08E03 SSB NO SW L310221CSGSSSA013 1.29E01 SSB YES SW L310221CSGSSBA013 4.27E02 SSS NO SW L310221CSGSSSA015 1.94E02 SSB NO SW L310221CSGSSBA014 5.21E03 SSB NO SW L310221CSGSSSA016 2.03E02 SSB NO SW L310221CSGSSBA015 3.23E03 SSB NO SW L310221CSGSSSA017 2.57E02 SSS NO SW L310221CSGSSBA016 4.90E03 SSS NO SW L310221CSGSSSA018 5.27E03 SSS NO SW L310221CSGSSBA017 6.13E03 SSB NO SW L310221CSGSSSA019 2.02E02 SSS NO

Attachment B EH&S TSD # 13-004 Revision 00 All Soil Sample Results Background Studies and Class 3 Southwest Survey Units Page 35 of 38 Cs137 Cs137 Result Sample Positive Result Sample Positive Study Sample ID pCi/g Type ID Study Sample ID pCi/g Type ID SW L310221CSGSSSA020 4.15E02 SSS NO SW L310220CQGSSSC024 1.19E01 SSS YES SW L310221CSGSSSA021 2.32E01 SSB YES SW L310220CRGSSSC007 2.35E01 SSB YES SW L310221CSGSSSA021 1.90E01 SSS YES SW L310220CRGSSSC008 3.03E01 SSB YES SW L310221CSGSSSA022 9.25E02 SSS YES SW L310220CRGSSSC012 3.80E02 SSS NO SW L310221CSGSSSA022 1.17E01 SSS YES SW L310220CRGSSSC016 1.49E01 SSS YES SW L310221CSGSSSA023 9.46E03 SSS NO SW L310220CRGSSSC024 9.97E02 SSB YES SW L310221CSGSSSA024 2.13E02 SSS NO SW L310220CRGSSSC001 1.27E01 SSS YES SW L310221CSGSSSA025 6.27E02 SSB NO SW L310220CRGSSSC002 1.45E02 SSB NO SW L310221CSGSSSA026 5.75E02 SSS NO SW L310220CRGSSSC003 9.79E03 SSB NO SW L310221CSGSSSA02 1.83E02 SSB NO SW L310220CRGSSSC004 2.78E01 SSB YES SW L310221CSGSSSA028 9.88E04 SSB NO SW L310220CRGSSSC00 2.86E02 SSS NO SW L310221CSGSSSA029 2.32E02 SSS NO SW L310220CRGSSSC006 2.10E01 SSS YES SW L310221CSGSSSA030 1.65E02 SSS NO SW L310220CRGSSSC009 2.63E02 SSS NO SW L310220CJGSSS001 5.55E03 SSS NO SW L310220CRGSSSC010 8.59E02 SSS YES SW L310220CJGSSS001 1.13E02 SSS NO SW L310220CRGSSSC011 2.58E03 SSB NO SW L310220CJGSSS002 9.53E02 SSS YES SW L310220CRGSSSC013 2.94E02 SSB NO SW L310220CJGSSS003 1.13E01 SSB YES SW L310220CRGSSSC014 3.07E01 SSB YES SW L310220CJGSSS004 2.41E01 SSS YES SW L310220CRGSSSC017 1.05E01 SSS YES SW L310220CJGSSS008 3.90E01 SSS YES SW L310220CRGSSSC018 1.04E01 SSS YES SW L310220CIGSSSB001 1.37E02 SSS NO SW L310220CRGSSSC019 5.00E01 SSS YES SW L310220CIGSSSB002 1.01E02 SSB NO SW L310220CRGSSSC021 9.23E02 SSB NO SW L310220CIGSSBB001 2.10E02 SSS NO SW L310220CRGSSSC022 7.28E01 SSB YES SW L310220CIGSSBB002 1.99E02 SSB NO SW L310220CRGSSSC023 1.64E01 SSS YES SW L310220CIGSSS010 2.87E01 SSB YES SW L310220CRGSSSC025 3.25E03 SSB NO SW L310220CIGSSS011 2.25E01 SSB YES SW L310220CRGSSSC026 1.19E02 SSB NO SW L310220CIGSSS012 3.71E01 SSB YES SW L310220CRGSSSC027 8.20E02 SSB NO SW L310220CIGSSS013 1.29E01 SSB YES SW L310220CRGSSSC028 2.80E01 SSS YES SW L310220CIGSSS014 2.79E01 SSB YES SW L310220CRGSSSC029 1.66E01 SSS YES SW L310220CIGSSSC015 9.03E01 SSS YES SW L310220CRGSSSC030 5.12E02 SSS NO SW L310220CIGSSSC016 2.40E01 SSB YES SW L310220CRGSSSC031 2.07E01 SSS YES SW L310220CIGSSSC017 1.14E+00 SSS YES SW L310220CRQSSSC025 1.07E02 SSB NO SW L310220CIGSSSC018 1.35E01 SSS YES SW L310220CJGSSSB001 2.71E01 SSS YES SW L310220CIGSSSC019 2.90E01 SSS YES SW L310220CJGSSSB001 2.74E01 SSS YES SW L310220CIGSSSC020 3.23E01 SSS NO SW L310220CJGSSBB001 5.81E02 SSS NO

Attachment B EH&S TSD # 13-004 Revision 00 All Soil Sample Results Background Studies and Class 3 Southwest Survey Units Page 36 of 38 Cs137 Cs137 Result Sample Positive Result Sample Positive Study Sample ID pCi/g Type ID Study Sample ID pCi/g Type ID SW L310220CJGSSSB002 1.02E01 SSB YES SW L310220CSGSSSB017 1.80E02 SSB NO SW L310220CJGSSBB002 1.13E01 SSS YES SW L310220CSGSSSB018 4.42E03 SSB NO SW L310220CJGSSSB003 1.30E01 SSB YES SW L310220CSGSSSB019 5.41E02 SSB NO SW L310220CJGSSBB003 4.09E02 SSS NO SW L310220CSGSSSB020 2.91E03 SSB NO SW L310220CJGSSSB004 3.18E02 SSS NO SW L310220CSGSSSB021 2.74E02 SSS NO SW L310220CJGSSBB004 1.24E01 SSB YES SW L310220CSGSSSB022 1.66E03 SSS NO SW L310220CJGSSSB005 6.57E02 SSS NO SW L310220CJGSSSA001 3.00E02 SSS NO SW L310220CJGSSBB005 8.06E04 SSS NO SW L310220CJGSSSA001 3.93E02 SSS NO SW L310220CJGSSSB006 6.84E02 SSS NO SW L310220CJGSSBA001 2.05E02 SSB NO SW L310220CJGSSBB008 9.77E03 SSB NO SW L310220CJGSSSA002 1.32E02 SSB NO SW L310220CJGSSSB007 3.37E02 SSB NO SW L310220CJGSSBA002 1.42E02 SSB NO SW L310220CJGSSBB007 4.08E02 SSS NO SW L310220CJGSSSA006 4.91E02 SSB NO SW L310220CJGSSSB008 7.69E02 SSS NO SW L310220CQGSSSA006 5.45E02 SSS NO SW L310220CQGSSSB008 6.77E02 SSS YES SW L310220CJGSSBA006 2.96E02 SSS NO SW L310220CIGSSBB001 2.10E02 SSB NO SW L310220CQGSSBA006 6.55E03 SSS NO SW L310220CIGSSBB002 1.99E02 SSS NO SW L310220CJGSSSA003 2.54E02 SSS NO SW L310220CIGSSSB001 1.37E02 SSS NO SW L310220CJGSSBA003 7.52E03 SSS NO SW L310220CIGSSSB002 1.01E02 SSS NO SW L310220CJGSSSA004 2.43E01 SSS YES SW L310220CQGSSBB014 3.30E02 SSS NO SW L310220CJGSSBA004 4.10E02 SSS NO SW L310220CSGSSSB001 3.48E02 SSS NO SW L310220CJGSSSA005 1.93E01 SSS YES SW L310220CSGSSSB002 4.09E02 SSS NO SW L310220CJGSSBA005 1.10E01 SSS YES SW L310220CSGSSSB003 3.84E03 SSS NO SW L310220CJGSSB8008 1.87E01 SSB YES SW L310220CSGSSSB004 1.10E02 SSB NO SW L310220CQGSSB8008 8.98E03 SSS NO SW L310220CSGSSSB005 1.42E02 SSS NO SW L310220CQGSSBA014 1.89E02 SSB NO SW L310220CSGSSSB006 3.96E03 SSS NO SW L310220CSGSSBA001 4.27E03 SSS NO SW L310220CSGSSSB007 4.14E02 SSS NO SW L310220CSGSSBA002 1.35E02 SSS NO SW L310220CSGSSSB008 2.22E02 SSS NO SW L310220CSGSSBA003 4.12E02 SSS NO SW L310220CSGSSSB009 1.88E03 SSS NO SW L310220CSGSSBA004 2.31E02 SSB NO SW L310220CSGSSSB010 5.28E02 SSS NO SW L310220CSGSSBA005 1.32E02 SSB NO SW L310220CSGSSSB011 1.72E02 SSB NO SW L310220CSGSSBA006 6.68E04 SSS NO SW L310220CSGSSSB013 7.68E02 SSB YES SW L310220CSGSSBA007 4.78E03 SSB NO SW L310220CSGSSSB014 2.32E02 SSB NO SW L310220CSGSSBA008 7.76E02 SSS NO SW L310220CSGSSSB015 4.04E02 SSB NO SW L310220CSGSSBA009 0.00E+00 SSS NO SW L310220CSGSSSB016 7.54E03 SSS NO SW L310220CSGSSBA010 9.42E03 SSS NO

Attachment B EH&S TSD # 13-004 Revision 00 All Soil Sample Results Background Studies and Class 3 Southwest Survey Units Page 37 of 38 Cs137 Cs137 Result Sample Positive Result Sample Positive Study Sample ID pCi/g Type ID Study Sample ID pCi/g Type ID SW L310220CSGSSBA011 3.76E02 SSS NO SW L310220CSGSSSA022 1.79E02 SSS NO SW L310220CSGSSBA012 5.68E03 SSS NO SW L310219CJGSSSA001 2.39E01 SSS YES SW L310220CSGSSBA013 2.32E03 SSS NO SW L310219CJGSSSA001 3.37E01 SSS YES SW L310220CSGSSBA014 3.91E03 SSS NO SW L310219CJGSSBA001 1.48E03 SSS NO SW L310220CSGSSBA015 1.85E02 SSS NO SW L310219CJGSSSA002 1.11E01 SSB NO SW L310220CSGSSBA016 1.63E02 SSS NO SW L310219CJGSSBA002 1.52E01 SSB YES SW L310220CSGSSBA017 1.04E02 SSS NO SW L310219CJGSSSA003 1.79E01 SSB YES SW L310220CSGSSBA018 1.70E02 SSS NO SW L310219CJGSSBA003 1.27E01 SSS YES SW L310220CSGSSBA019 1.67E02 SSS NO SW L310219CJGSSSA004 1.20E01 SSB YES SW L310220CSGSSBA020 3.00E02 SSS NO SW L310219CJGSSBA004 1.90E02 SSS NO SW L310220CSGSSBA021 2.57E02 SSB NO SW L310219CJGSSSA005 1.09E01 SSS YES SW L310220CSGSSBA022 1.94E02 SSS NO SW L310219CQGSSSA005 1.64E01 SSS YES SW L310220CQGSSSA014 3.33E02 SSS NO SW L310219CJGSSBA005 2.42E02 SSS NO SW L310220CSGSSSA001 2.19E03 SSB NO SW L310219CQGSSBA005 3.16E03 SSS NO SW L310220CSGSSSA002 5.32E02 SSS NO SW L310219CQGSSBA009 5.33E02 SSS NO SW L310220CSGSSSA003 6.49E02 SSS YES SW L310219CSGSSBA001 5.44E02 SSB NO SW L310220CSGSSSA004 9.49E02 SSS YES SW L310219CSGSSBA002 4.64E02 SSB NO SW L310220CSGSSSA005 2.66E02 SSS NO SW L310219CSGSSBA003 7.44E03 SSS NO SW L310220CSGSSSA006 2.07E04 SSS NO SW L310219CSGSSBA004 1.37E03 SSS NO SW L310220CSGSSSA007 7.12E02 SSS NO SW L310219CSGSSBA005 1.22E03 SSS NO SW L310220CSGSSSA008 4.76E02 SSS NO SW L310219CSGSSBA006 3.05E02 SSS NO SW L310220CSGSSSA009 2.02E02 SSS NO SW L310219CSGSSBA007 1.69E02 SSS NO SW L310220CSGSSSA010 1.38E02 SSS NO SW L310219CSGSSBA008 8.75E02 SSS NO SW L310220CSGSSSA011 0.00E+00 SSS NO SW L310219CSGSSBA009 1.68E02 SSB NO SW L310220CSGSSSA012 1.30E02 SSS NO SW L310219CSGSSBA0010 3.87E03 SSS NO SW L310220CSGSSSA013 4.84E03 SSS NO SW L310219CSGSSBA0011 2.92E02 SSS NO SW L310220CSGSSSA014 9.09E03 SSB NO SW L310219CSGSSBA0012 7.74E04 SSS NO SW L310220CSGSSSA015 1.47E02 SSB NO SW L310219CSGSSBA0013 4.05E02 SSS NO SW L310220CSGSSSA016 8.58E03 SSS NO SW L310219CSGSSBA0014 1.57E02 SSS NO SW L310220CSGSSSA017 5.49E03 SSS NO SW L310219CSGSSBA0015 2.23E02 SSS NO SW L310220CSGSSSA018 6.82E03 SSB NO SW L310219CSGSSBA0016 4.06E03 SSS NO SW L310220CSGSSSA019 3.49E02 SSS NO SW L310219CSGSSBA0017 6.96E03 SSS NO SW L310220CSGSSSA020 3.75E03 SSB NO SW L310219CSGSSBA0018 9.52E03 SSS NO SW L310220CSGSSSA021 2.38E03 SSS NO SW L310219CSGSSBA0019 2.68E02 SSS NO

Attachment B EH&S TSD # 13-004 Revision 00 All Soil Sample Results Background Studies and Class 3 Southwest Survey Units Page 38 of 38 Cs137 Cs137 Result Sample Positive Result Sample Positive Study Sample ID pCi/g Type ID Study Sample ID pCi/g Type ID SW L310219CSGSSBA0020 9.09E03 SSS NO SW L310219CSGSSSA010 1.83E02 SSS NO SW L310219CQGSSSA009 1.35E02 SSS NO SW L310219CSGSSSA011 2.13E02 SSS NO SW L310219CSGSSSA001 1.06E01 SSS NO SW L310219CSGSSSA012 5.19E02 SSS NO SW L310219CSGSSSA002 1.49E02 SSS NO SW L310219CSGSSSA013 2.63E02 SSS NO SW L310219CSGSSSA003 3.30E02 SSS NO SW L310219CSGSSSA014 6.41E02 SSS NO SW L310219CSGSSSA004 4.21E02 SSS NO SW L310219CSGSSSA015 3.08E02 SSS NO SW L310219CSGSSSA005 5.82E02 SSS NO SW L310219CSGSSSA016 2.53E02 SSS NO SW L310219CSGSSSA006 3.84E02 SSS NO SW L310219CSGSSSA017 2.93E02 SSS NO SW L310219CSGSSSA007 3.66E02 SSS NO SW L310219CSGSSSA018 9.14E03 SSS NO SW L310219CSGSSSA008 1.30E02 SSS NO SW L310219CSGSSSA019 1.02E02 SSS NO SW L310219CSGSSSA009 1.88E02 SSS NO SW L310219CSGSSSA020 4.20E03 SSS NO