Text

Westinghouse Columbia Fuel Fabrication Facility Hf Spiking Station 1 Assessment Report
	ML20294A056
Person / Time
Site:	Westinghouse
Issue date:	07/30/2020
From:	Joyner D; Westinghouse
To:	Kuhn K; Office of Nuclear Material Safety and Safeguards, State of SC, Dept of Health & Environmental Control
References
	LTR-RAC-20-65
	Download: ML20294A056 (154)
	v • d • e

Westinghouse Electric Company Nuclear Fuel Columbia Fuel Fabrication Facility 5801 Bluff Road Hopkins, South Carolina 29061 USA SCDHEC, BLWM Direct tel: 803.647.1920 Kim Kuhn Direct fax: 803.695.3964 2600 Bull Street e-mail: joynerdp@westinghouse.com Columbia, SC 29201 Your ref:

Our ref: LTR-RAC-20-65 July 30, 2020

Subject:

HF Spiking Station #1 Soil Sampling Assessment Report Mrs. Kuhn:

Attached for your review and approval are the Westinghouse Columbia Fuel Fabrication Facility (CFFF or Site) assessment report (Assessment) for the Hydrofluoric Acid Spiking Station (HFSS) #1 as well as the Technical Basis Document (TBD). The Assessment and TBD were prepared by AECOM Technical Services (AECOM) and Leidos, respectively, and document the investigation activities, results and conclusions from completion of the Work Plan which was approved by South Carolina Department of Health and Environmental Controls (SCDHEC or Department) on March 30, 2020. Based on these submittals, CFFF concludes that HFSS #1 is protective of employee health and safety and poses no threat to the public.

Background

CFFF uses two independent spiking stations referred to as Hydrofluoric Acid Spiking Stations 1 or 2 (HFSS

1 or HFSS #2). The stations are adjacent to each other and mix hydrofluoric acid with uranyl nitrate (UN) for the conversion process. Previous assessment of HFSS #2 after the discovery in 2018 of a release from this station indicated the presence of uranium (U) within sub-slab soils beneath HFSS #2. Subject to DHECs review and approval, the station was subsequently remediated and returned to normal operation.

Following the HFSS #2 assessment, CFFF completed the following actions to mitigate future issues at the spiking stations in the plant.

Developed an improved design for both spiking stations and diked areas that prevents spills of process solution from impacting the concrete, protects the concrete with a floor coating that is impervious to acidic materials and guards against undetected deterioration of the concrete floor.

o The improved design for HFSS #2 was implemented and also included a new preventive maintenance strategy.

Page 2 of 4 Our ref: LTR-RAC-20-65 July 30, 2020 To comprehensively assess potential environmental impacts at the CFFF from current and historical operations, the Site also:

Entered into Consent Agreement (CA) 19-02-HW with SCDHEC in February of 2019 to address environmental impacts originating from facility operations. This included the establishment of eight operational units (OUs) and the installation of sentinel wells. One OU (Chemical Area) includes the portions of the manufacturing building where liquid uranium processing and handling operations occur. A network of sentinel wells was installed around the Chemical Area OU to detect a potential leak or contaminant migration from this area.

Completed the first phase of a comprehensive Remedial Investigation (RI) performed under the CA, with a final summary report submitted to SCDHEC on July 15, 2020. The results of this assessment show there is no off-site impact from CFFF operations, and the extent of the existing impact is limited, generally well-defined and poses no significant threat to plant workers, the general public or the environment.

Developed procedure RA-433, Environmental Remediation, using industry best practices to standardize a risk-based, decision-making process for analysis of environmental data and facility response to a release with potential environmental impact. This procedure uses best practices from an industry groundwater protection initiative to prevent migration of material off-site and to minimize decommissioning impacts.

Developed and implemented a Conceptual Site Model (CSM) to assist CFFF with the assessment of environmental data. The CSM was enhanced using the data from the first phase of the RI, making it a more effective decision-making tool. The CSM coupled with improved environmental monitoring and the remediation procedure provide a robust environmental protection program.

HFSS #1 Investigation Due to the conditions found in HFSS #2 CFFF investigated the conditions of HFSS #1. CFFF submitted for SCDHECs approval a Work Plan for the subsurface investigation of the HFSS #1 area in a letter (LTR-RAC-20-31) dated March 20, 2020. The Department subsequently approved the plan on March 30, 2020.

In accordance with the aforementioned plan and as part of implementation of the improved HFSS #1 design, the concrete floor was removed to construct the new containment dike. Soil samples were collected from May 4-6 of 2020 to evaluate the subsurface conditions. The results of the sampling are included within the Assessment Report prepared by AECOM (Attachment 1).

Page 3 of 4 Our ref: LTR-RAC-20-65 July 30, 2020 Calculations of Dose and Risk Following the Sites Environmental Remediation procedure, RA-433 and AECOMs recommendations, CFFF contracted Leidos to evaluate risk and dose to the industrial worker at HFSS #1 resulting from residual uranium beneath the concrete floor. The Technical Basis Document prepared by Leidos and dated July 28, 2020 is attached to this cover letter (Attachment 2).

Conclusions and Further Environmental Evaluation Based on the data provided in the AECOM HFSS #1 Assessment Report and the Leidos TBD, the following conclusion were made:

Neither fluoride nor nitrate exceeded the CFFF action levels delineated in the Sites Remediation Procedure.

Tc-99 results were non-detect and further evaluation of Tc-99 was not warranted.

Uranium results showed exceedances of the remedial action levels, triggering an evaluation of the residual contamination.

Based on the operating configuration of the HF Spiking Station, the concrete floor slab provides an adequate barrier between the residual U and an industrial worker under current conditions.

Over the course of the 100-year timeframe that was modeled, the highest dose was calculated at 0.324 mRem/year and the highest Total Excess Cancer Risk (TR) was calculated at 6.47E-6.

Based on the TBD results, it is acceptable to leave the material in place beneath a 6-in concrete cover at present time and for the next 100 years.

The current decommissioning cost estimate includes funding for the removal of material beneath the process-building slab in the Chemical Area OU, including the area where the Spiking Stations are located.

Leaving the residual contamination in-place, with the existing controls and monitoring program poses no risk for off-site impacts.

Based on the Final Interim RI Data Summary Report, the potential for U to migrate with groundwater has been shown to be limited at the Site.

Closing We look forward to continuing work with SCDHEC to finalize this assessment. CFFF is committed to protecting the safety of its employees, the community, and the environment, and we believe the transparency and ongoing activities being performed under the Consent Agreement demonstrate this commitment. If you have any questions or comments, or if we can be of further assistance, please do not hesitate to contact me or Nancy Parr at (803) 647-3338 or parrnb@westinghouse.com.

Page 4 of 4 Our ref: LTR-RAC-20-65 July 30, 2020 Respectfully, Diana P. Joyner Principal Environmental Engineer Westinghouse Electric Company, CFFF 803.497.7062 (m) joynerdp@westinghouse.com cc: M. Annacone, VP Columbia Fuel J. Ferguson, EH&S Manager V. Kelmeckis, Corporate Environmental Manager N. Parr, Environmental Protection Manager J. Grant, AECOM Project Manager K. Harris, Leidos ENOVIA Records Attachments:

1. HF Spiking Station #1 Assessment Report dated July 22, 2020 prepared by AECOM

2. Technical Basis Document dated July 28, 2020 prepared by Leidos

HF Spiking Station #1 Assessment Report Westinghouse Columbia Fuel Fabrication Facility 5801 Bluff Road Hopkins, South Carolina Prepared for:

Westinghouse Columbia Fuel Fabrication Facility 5801 Bluff Road Hopkins, South Carolina 29061-9121 Prepared by:

AECOM Technical Services, Inc.

101 Research Drive Columbia, SC 29203 AECOM Project No. 60633543 July 22, 2020

HF Spiking Station #1 Assessment Report Westinghouse Columbia Fuel Fabrication Facility 5801 Bluff Road Hopkins, South Carolina Prepared By Jeremy Grant, Senior Project Manager Reviewed By Scott Ross, P.G., Senior Project Manager

HF Spiking Station #1 Assessment Report Westinghouse Columbia Fuel Fabrication Facility AECOM Project No. 60633543 Hopkins, South Carolina TABLE OF CONTENTS Section Page LIST OF TABLES .......................................................................................................................................... i LIST OF FIGURES ........................................................................................................................................ i LIST OF APPENDICES ................................................................................................................................. i LIST OF ACRONYMS .................................................................................................................................. ii

1.0 INTRODUCTION

.............................................................................................................................. 1-1 1.1 Site Background ..................................................................................................................... 1-1 1.1.1 Site Description ................................................................................................... 1-1 1.1.2 Site History .......................................................................................................... 1-2 1.2 Site Investigation Objective .................................................................................................... 1-2 2.0 SITE INVESTIGATION ACTIVITIES ............................................................................................... 2-1 2.1 Field Investigation Activities ................................................................................................... 2-1 2.1.1 Soil Assessment.................................................................................................. 2-1 2.1.2 Soil Analytical Results ......................................................................................... 2-2

3.0 CONCLUSION

S ............................................................................................................................... 3-1

4.0 REFERENCES

................................................................................................................................. 4-1 TABLES Table 1 Soil Analytical Results FIGURES Figure 1 Site Location Map Figure 2 Site Map Figure 3 HF Spiking Station #1 Soil CoC Map LIST OF APPENDICES Appendix A Boring Logs Appendix B Laboratory Analytical Data 2020-07-22_final_hfss 1 assessment report_aecom.docx i July 2020

HF Spiking Station #1 Assessment Report Westinghouse Columbia Fuel Fabrication Facility AECOM Project No. 60633543 Hopkins, South Carolina LIST OF ACRONYMS AECOM AECOM Technical Services, Inc.

bss Below Soil Surface CSM Conceptual Site Model CA Consent Agreement CFFF Columbia Fuel Fabrication Facility GEL GEL Laboratories, LLC HF Hydrofluoric Acid HFSS HF Spiking Station OU Operable Unit RAL Remedial Action Level RI Remedial Investigation SCDHEC South Carolina Department of Health and Environmental Control Tc-99 Technetium 99 U Uranium 2020-07-22_final_hfss 1 assessment report_aecom.docx ii July 2020

HF Spiking Station #1 Assessment Report Westinghouse Columbia Fuel Fabrication Facility AECOM Project No. 60633543 Hopkins, South Carolina

1.0 INTRODUCTION

The Westinghouse Columbia Fuel Fabrication Facility (CFFF) uses two spiking stations, located directly adjacent to each other, where hydrofluoric acid (HF) is mixed with uranyl nitrate for the conversion process. Previous assessment of HF Spiking Station (HFSS) #2 in 2018 after the discovery of a potential release from this station indicated the presence of uranium (U) within subslab soils beneath HFSS #2.

Approximately 76 metric tons of soil from beneath HFSS #2 were excavated and disposed prior to HFSS

2 being rebuilt. As part of CFFFs extent of condition review, the facility is also upgrading the HFSS #1 to the new design which includes investigation of subslab soil quality beneath HFSS #1 under the Consent Agreement (CA) with the South Carolina Department of Health and Environmental Control (SCDHEC).

The CA, Conceptual Site Model (CSM) and a risk-based site remediation procedure were not in place when the HFSS #2 issue was discovered. This report documents assessment activities related to HFSS

1.

1.1 Site Background 1.1.1 Site Description The CFFF (the Site") is located at 5801 Bluff Road (SC Hwy 48) near Hopkins, South Carolina (Figure 1). The Site includes approximately 1,151 acres, the majority of which is undeveloped. The developed portion of the property including the plant building, an employee parking area, several smaller support buildings, outdoor supply staging areas, and wastewater lagoons encompasses approximately 75 acres.

The developed area is located approximately 2,700 feet southwest of Bluff Road within the north-central portion of the property. The position of the developed area within the Site creates a substantial buffer from downgradient, adjoining properties. HFSS #1 is located in the south central portion of the plant building.

A manmade dike approximately 1,850 feet south of HFSS #1 backs up water in Mill Creek, creating Lower Sunset Lake. A second manmade dike cuts across Mill Creek creating Upper Sunset Lake. Upper and Lower Sunset Lake are located approximately 1,250 feet southwest of the HFSS #1 (Figure 2) within a natural oxbow of Mill Creek. A small, man-made pond known as the Gator Pond is also located approximately 900 feet southwest of HFSS #1. Surface water drainage on the developed portion of the property is managed by several ditches which empty into Upper Sunset Lake.

The southern portion of the property, including the Gator Pond, and both portions of Sunset Lake (part of Mill Creek) are located within the floodplain of the Congaree River. The plant and the floodplain are separated by a bluff, approximately 20 feet high, located immediately south of the east-west trending dirt road on the plant property.

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HF Spiking Station #1 Assessment Report Westinghouse Columbia Fuel Fabrication Facility AECOM Project No. 60633543 Hopkins, South Carolina 1.1.2 Site History The CFFF plant was constructed in 1969 to manufacture fuel assemblies and components for the commercial nuclear power industry. Prior to construction the Site consisted of farmland, woodlands, and floodplain.

As a result of historical operations and the need to further assess environmental impacts, the Site entered into a CA with SCDHEC on February 26, 2019. As discussed in the Final Remedial Investigation Work Plan (AECOM, 2019), CFFF records indicate historic releases in the Chemical Area of the manufacturing building. This area was established as the Chemical Area Operable Unit (OU). The soil underneath this portion of the manufacturing building is known to be radiologically impacted with residual quantities of U.

Because of this, a Chemical Area OU groundwater monitoring well network was established in 2018-2019. Collectively, the monitoring wells and the CSM provide a robust early detection program to monitor the OU for migration of potential impacts from past or future manufacturing operations for the life of the plant.

The HFSS #1 system and containment dike were last replaced in March 2002 following an above ground piping leak in October 2001. The previous containment dike, with interior dimensions of 112 inches by 84 inches, used the exterior manufacturing building wall as one of its four sides. The replacement project included moving the south wall of the dike approximately 12 inches from the exterior building wall.

Seventeen 55-gallon drums of concrete floor and subsurface soils were removed to install the new containment dike. The event was documented in the Sites decommissioning records in 2001 and was incorporated into the initial CSM included with the Final Remedial Investigation (RI) Work Plan approved in June 2019 (AECOM, 2019).

1.2 Site Investigation Objective As part of the CA, CFFF is performing an RI to understand the source, nature and extent of impacts, resulting from current and historical operations at the Site. The first phase of the investigation has been completed and supported the conclusion that there are no known offsite impacts from plant operations.

CFFF is currently developing the scope of work to be proposed to SCDHEC for the second phase of the RI.

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HF Spiking Station #1 Assessment Report Westinghouse Columbia Fuel Fabrication Facility AECOM Project No. 60633543 Hopkins, South Carolina 2.0 SITE INVESTIGATION ACTIVITIES This section discusses the rationale and methods used during the soil investigation. AECOM Technical Services, Inc (AECOM) performed the soil assessment in HFSS #1 from May 4, 2020 to May 6, 2020.

The investigative efforts were performed to determine if subsurface soils and plant building footers have been impacted by potential releases from HFSS #1.

2.1 Field Investigation Activities Field investigation activities included the following:

Installation of 5 vertical hand auger borings (HF1-B1 through HF1-B5) to collect soil samples from beneath HFSS #1 footprint; and

Installation of 2 angled hand auger borings (HF1-B6 and HF1-B7) to collect soil samples within and adjacent to the HFSS #1 footprint that were also in close proximity to the building footer for structural engineering evaluation.

2.1.1 Soil Assessment To protect CFFF workers outside of the HFSS #1 study area from potential exposure to dust generated during concrete removal and soil disturbance, a tented structure was set up around the work station. A temporary berm was also installed on the floor to keep potential spills from outside of the study area from reaching the exposed subslab soil.

Seven (7) borings (HF1-B1 through HF-B7) were advanced using dedicated stainless steel hand augers within the HFSS #1 study area (Figure 3). These borings were advanced to hand auger refusal or a depth of 10 feet below soil surface (bss), whichever was less. The depth to the water table below HFSS

1 is approximately 12 feet bss. Boreholes HF1-B4, HF1-B6, and HF1-B7 encountered hand auger refusal at depths ranging from 5.08 feet to 5.37 feet bss.

Composite soil samples were collected from the following intervals: 1-2 feet bss, 3-4 feet bss, 5-6 feet bss, 7-8 feet bss, and 8-10 feet bss, with the exception of borings where hand auger refusal was encountered at shallower depths. The top foot of soil generated at each boring was discarded because the surface of the soil beneath the concrete was likely cross contaminated with Uranium (U) during the cutting and removal of the concrete floor. The concrete floor in this area is known to contain elevated U concentrations.

When pulling the hand auger bucket out of the borehole and pushing the hand auger bucket back into the borehole, soil from the sidewalls of the borehole could have collapsed into the bottom of the borehole. To ensure that representative samples were collected from the desired depths, AECOM personnel used a tape measure before and after each advancement of the hand auger bucket within the sample interval to document how much soil within each retrieved hand auger bucket was native soil at a given depth. Soil from the top of the hand auger bucket was emptied into 3-gallon plastic bags until only the measured increase in the total borehole depth remained within the hand auger bucket.

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HF Spiking Station #1 Assessment Report Westinghouse Columbia Fuel Fabrication Facility AECOM Project No. 60633543 Hopkins, South Carolina One grab sample (HF1-B7 REFUSAL) was collected at the refusal depth of borehole HF1-B7 to assess pH at the depth that is believed to be the top of the plant buildings footer.

Soil from the composite sample intervals was emptied from the hand auger bucket onto a 3 foot by 3 foot 4-mil polyethylene plastic mixing square, dedicated to the specified sampling interval, and homogenized.

Homogenized soil samples were placed in pre-cleaned, laboratory-provided sample bottles.

After the soil samples were collected from HF1-B6 and HF1-B7, CFFF and AECOM personnel used the hand auger extension rods and a plumb bob to obtain measurements that would allow for the assessment of the angle at which boreholes B-6 and B-7 extended into the subsurface, the depth below soil surface of the sampling intervals, and how far from the borehole opening each borehole extended towards the plant buildings footer.

Subsurface lithology from each borehole was logged by an AECOM geologist. Boring logs are included in Appendix A.

2.1.2 Soil Sample Analysis and Results Soil samples were submitted to GEL Laboratories, LLC (GEL) for analysis of percent moisture using ASTM D 2216 (Modified), fluoride and nitrate using EPA Method 9056A, isotopic U using EPA DOE EML HASL-300 (U-02-RC Modified), technetium 99 (Tc-99) using DOE EML HASL-300 (Tc-02-RC Modified) and pH using EPA Method 9045D. Soil analytical results and the depth bss of the samples are summarized in Table 1 and displayed on Figure 3. Laboratory analytical results are contained in Appendix B.

Soil from borings HF1-B1, HF1-B3, HF1-B5, and HF1-B7 contained uranium above the Site-specific remediation action level (RAL), as documented in the facilitys Procedure RA-433 Environmental Remediation Revision 1 (CFFF, 2020), with the greatest impact encountered in soil samples from boreholes HF1-B1 and HF1-B3 at depths ranging from two feet bss to eight feet bss. The Site-specific RAL incorporates established regulatory screening levels that are protective of human health and the environment for decision making purposes. Impact in soil within boreholes HF1-B1 and HF1-B3 increased from the surface to the greatest impact in the 4-6 feet sampling interval and decreased thereafter.

Surficial soils from the two angled borings (HF1-B6 0-2 foot and HF1-B7 0-2 foot) were intended to be analyzed for pH only due to potential cross contamination with U impacted concrete from the floor.

However, the chain of custody for the surficial composite soil sample from HFSS1-B7 0-2 foot was errantly marked to also analyze soil from this interval for fluoride, nitrate, Tc-99 and U. Analytical results from the 0-2 foot interval in samples HFSS-1 B6 and HFSS-1 B-7 are similar to the analytical for the surface soil samples from the 1-2 foot interval for HFSS-1 B1 through HF1-B5.

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HF Spiking Station #1 Assessment Report Westinghouse Columbia Fuel Fabrication Facility AECOM Project No. 60633543 Hopkins, South Carolina

3.0 CONCLUSION

S Based upon the results of this assessment, AECOM concludes the following:

Some of the soil below the concrete floor within the HFSS #1 area is impacted with fluoride, nitrate, and uranium, and has areas of low pH (<5 standard units). This data is representative of other soils below the Chemical Area OU.

In general, surficial soils (0-2 feet bss) had minimal impact from the operations of HFSS #1. This is likely due to the dike replacement early 2002. Based on the minimal impact in the shallow surficial soil beneath the concrete slab, operations of HFSS #1 do not appear to have impacted these soils since this replacement.

Soil from borings HFSS1-B1, HFSS1-B3, HFSS1-B5, and HFSS1-B7 exceed the Site-specific remedial action levels. Based upon the facilitys Procedure RA-433 Environmental Remediation Revision 1, the following evaluations should be undertaken:

1. Complete dose/risk assessment under current circumstances (industrial worker scenario).

2. Determine the potential for off-site impacts if the impacted soil is left in place.

3. Complete an assessment of Site conditions and future use of the area.

The results of these evaluations are documented in the Technical Basis Document prepared by Leidos (Leidos, 2020).

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HF Spiking Station #1 Assessment Report Westinghouse Columbia Fuel Fabrication Facility AECOM Project No. 60633543 Hopkins, South Carolina

4.0 REFERENCES

AECOM, 2013. Final Remedial Investigation Work Plan, Westinghouse Columbia Fuel Fabrication Facility, June 2019.

Leidos, 2020. Technical Basis Document - Evaluation of Dose and Risk from Uranium in Soil at HF Spiking Station #1 at the Westinghouse Columbia Fuel Fabrication Facility (CFFF), July 2020.

RA-433, Rev 1 - CFFF Environmental Remediation Procedure, dated January 16, 2020.

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HF Spiking Station #1 Assessment Report Westinghouse Columbia Fuel Fabrication Facility AECOM Project No. 60633543 Hopkins, South Carolina TABLES hfss 1 assessment report_july 2020.docx July 2020

Table 1 Westinghouse Columbia Fuel Fabrication Facility HF Spiking Station #1 Soil Analytical Results Analyte pH Fluoride Nitrate Technetium99 Uranium233/234 Uranium235/236 Uranium238 Unit SU mg/kg mg/kg pCi/g pCi/g pCi/g pCi/g Sample Sample ID Depth Depth BSS Sample Date HF1B1(12) 1 2 ft 1 2 ft 5/4/2020 4.81 28.3 180 0.447 U 13.2 0.828 3.22 HF1B1(24) 2 4 ft 2 4 ft 5/4/2020 4.02 706 707 0.88 U 8,310 465 1,620 HF1B1(46) 4 6 ft 4 6 ft 5/4/2020 3.88 1500 1240 0.0772 U 10,100 436 1,680 HF1B1(68) 6 8 ft 6 8 ft 5/4/2020 4.03 936 971 0.871 U 4,500 252 802 HF1B1(810) 8 10 ft 8 10 ft 5/4/2020 4.26 96.4 303 0.656 U 1,440 79.4 263 HF1B2(12) 1 2 ft 1 2 ft 5/5/2020 6.38 1.28 76.5 0 4.65 0.455 1.39 HF1B2(24) 2 4 ft 2 4 ft 5/5/2020 5.16 0.623 J 90.8 0 0.847 0.107 U 0.785 HF1B2(46) 4 6 ft 4 6 ft 5/5/2020 6.05 1.09 94 0 1.5 0.0943 U 0.955 HF1B2(68) 6 8 ft 6 8 ft 5/5/2020 5.98 1.1 45.9 0.00658 U 0.926 0.0131 U 0.218 HF1B2(810) 8 10 ft 8 10 ft 5/5/2020 6.17 0.8 J 23.4 0 1.52 0.0407 U 0.421 HF1B3(12) 1 2 ft 1 2 ft 5/5/2020 4.82 6.24 285 0 3.52 0.0795 U 1.13 HF1B3(24) 2 4 ft 2 4 ft 5/5/2020 4.08 683 589 0 3,510 159 582 HF1B3(46) 4 6 ft 4 6 ft 5/5/2020 3.96 1020 1290 0 5,600 264 948 HF1B3(68) 6 8 ft 6 8 ft 5/5/2020 4.11 546 700 0 2,790 171 632 HF1B3(810) 8 10 ft 8 10 ft 5/5/2020 4.25 343 398 0 2,600 139 636 HF1B4(12) 1 2 ft 1 2 ft 5/6/2020 5.46 65.8 69.3 0 563 29 110 HF1B4(24) 2 4 ft 2 4 ft 5/6/2020 3.97 335 70.4 0.171 U 511 22.1 105 HF1B4(45.33) 4 5.33 ft 4 5.33 ft 5/6/2020 3.29 359 82.5 2.6 U 700 31.9 139 HF1B5(12) 1 2 ft 1 2 ft 5/6/2020 5.07 1.55 232 0 9.36 0.396 2.56 HF1B5(24) 2 4 ft 2 4 ft 5/6/2020 4.39 135 288 0 1,520 82.8 246 HF1B5(46) 4 6 ft 4 6 ft 5/6/2020 4.28 21.7 440 0 1,250 50.9 224 HF1B5(68) 6 8 ft 6 8 ft 5/6/2020 5.67 1.11 150 0 9.67 0.587 1.61 HF1B5(810) 8 10 ft 8 10 ft 5/6/2020 4.35 0.879 J 54.3 0 2.65 0.294 1.02 HF1B6(02) 0 2 ft 01.90 ft 5/6/2020 8.09 NA NA NA NA NA NA HF1B6(24) 2 4 ft 1.903.79 ft 5/6/2020 6.35 5.67 14.5 0 403 19.3 78.5 HF1B6(45.67) 4 5.67 ft 3.795.37 ft 5/6/2020 6.22 43.8 38 0 226 9.66 41.6 HF1B7(02) 0 2 ft 01.88 ft 5/6/2020 4.72 40.4 127 0 2,140 93.5 313 HF1B7(24) 2 4 ft 1.883.75 ft 5/6/2020 4.41 158 178 3.15 U 2,020 92 355 HF1B7(45.42) 4 5.42 ft 3.755.08 ft 5/6/2020 5.21 121 83 0.627 U 799 46.5 158 HF1B7REFUSAL 5.42 5.42 ft 5.08 ft 5/6/2020 4.58 NA NA NA NA NA NA Industrial Use Remedial Action Level 3,100 130,000 89,400 3,310 39 179 Notes: SU standard units ft feet mg/kg milligram per kilogram U not detected above the minimum detectible concentration pCi/g picocuries per gram Shaded cells exceed the remedial action screening level BSS below soil surface

HF Spiking Station #1 Assessment Report Westinghouse Columbia Fuel Fabrication Facility AECOM Project No. 60633543 Hopkins, South Carolina FIGURES hfss 1 assessment report_july 2020.docx July 2020

Legend Locations Property Line Topographic Quadrangle Boundary ID Topographic Quadrangle Name 1 Southwest Columbia 2 Gaston 3 Fort Jackson South 4 Saylors Lake 5 Congaree 6 Gadsden Dominion Energy Substation 1 CFFF 3 5 2

q 0 2,000 4,000 Feet 1:48,000 Map Projection: NAD 1983, South Carolina State Plane, FIPS 3900, Feet Datum: North American 1983 Data Source: Esri/USGS

^ 101 Research Drive Columbia, SC 29203 T: (803) 254-4400 F: (803) 771-6676 Site Location Map WESTINGHOUSE COLUMBIA FUEL FABRICATION FACILITY 4 6 HOPKINS, SOUTH CAROLINA PROJECT NO. PREPARED BY: DATE:

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Sample Data Collection Results HF1 - B1 Sample Data 05-04-2020 HFSS #2 Depth BSS ft.

Corrosivity SU Fluoride mg/kg Nitrate mg/kg Technetium-99 Uranium-233/234 Uranium-235/236 Uranium-238 pCi/g pCi/g pCi/g pCi/g HF1 - B2 Sample Data 05-05-2020 Depth BSS Corrosivity Fluoride Nitrate Technetium-99 Uranium-233/234 Uranium-235/236 Uranium-238 ft. SU mg/kg mg/kg pCi/g pCi/g pCi/g pCi/g HF1 - B3 Sample Data 05-05-2020 Depth BSS Corrosivity Fluoride Nitrate Technetium-99 Uranium-233/234 Uranium-235/236 Uranium-238 ft. SU mg/kg mg/kg pCi/g pCi/g pCi/g pCi/g HF1 - B4 Sample Data 05-06-2020 Nitrate HF1-B1 HF1-B2 Depth BSS ft.

Corrosivity SU Fluoride mg/kg mg/kg Technetium-99 Uranium-233/234 Uranium-235/236 Uranium-238 pCi/g pCi/g pCi/g pCi/g HF1 - B5 Sample Data 05-06-2020 HFSS #1 Depth BSS ft.

Corrosivity SU Fluoride mg/kg Nitrate mg/kg Technetium-99 Uranium-233/234 Uranium-235/236 Uranium-238 pCi/g pCi/g pCi/g pCi/g c b a HF1-B6 HF1 - B7 Sample Data (Sample collected @ angle - a,b,c)05-06-2020 HF1-B3 Depth BSS ft.

Corrosivity SU Fluoride mg/kg Nitrate mg/kg Technetium-99 Uranium-233/234 Uranium-235/236 Uranium-238 pCi/g pCi/g pCi/g pCi/g HF1 - B7 Sample Data (Sample collected @ angle - d,e,f) 05-06-2020 Depth BSS Corrosivity Fluoride Nitrate Technetium-99 Uranium-233/234 Uranium-235/236 Uranium-238 ft. SU mg/kg mg/kg pCi/g pCi/g pCi/g pCi/g f e d HF1-B7 Fluoride Nitrate Technetium-99 Uranium-233/234 Uranium-235/236 Uranium-238 REMEDIAL ACTION mg/kg mg/kg pCi/g pCi/g pCi/g pCi/g SCREENING LEVEL NOTES:

HF1-B4 BSS - BELOW SOIL SURFACE FT. - FEET SU - STANDARD UNITS HF1-B5 mg/kg - MILLIGRAM PER KILOGRAM pCi/g - PICOCURIES PER GRAM U - NOT DETECTED ABOVE THE METHOD DETECTION CONCENTRATION N/S - NOT SAMPLED

- SHADED CELLS EXCEED THE REMEDIAL ACTION SCREENING LEVEL

- GEL LABORATORY WORK ORDERS : 510581, 510757, 510807 101 Research Drive Columbia, South Carolina 29203 Telephone (803) 254-4400 : Fax (803) 771-6676 PLAN VIEW - HF SPIKING STATION www.AECOM.com LEGEND - SOIL SAMPLING Figure 3 SYMBOL DESCRIPTION HF Spiking Station #1 REMOVED DIKE OUTLINE, HF SPIKING STATION 1 Soil CoC Map CONCRETE REMOVAL FOR REPLACEMENT SPIKING STATION SOIL SAMPLING LOCATIONS FOR SCDHEC WORK PLAN WESTINGHOUSE COLUMBIA FUEL FABRICATION FACILITY SOIL SAMPLING LOCATIONS FOR STRUCTURAL ENGINEERING, HOPKINS, SOUTH CAROLINA (SAMPLES COLLECTED @ AN ANGLE) PROJECT NO. PREPARED BY: CAV CHECKED BY: JG APPROVED BY: JG 60533543 DATE: JULY 15, 2020 DATE: JULY 15, 2020 SHEET: 1 OF 1

HF Spiking Station #1 Assessment Report Westinghouse Columbia Fuel Fabrication Facility AECOM Project No. 60633543 Hopkins, South Carolina APPENDIX A BORING LOGS hfss 1 assessment report_july 2020.docx July 2020

Soil Boring Report BORING NO.

PAGE 1 OF HF1-B1 1

PROJECT: HF Spiking Station #1 PROJECT NO: 60633543 CLIENT: Westinghouse LOCATION: Hopkins, SC CONTRACTOR: AECOM ELEVATION:

EQUIPMENT: Stainless Steel Hand Auger NORTHING:

GROUNDWATER DRILLING INFORMATION EASTING:

DATE HRS WATER METHOD CASING TEMP / PERM DATE START: 5/4/2020 HOLE DIA. CASING DIA. CASING TYPE DATE FINISH: 5/4/2020 DEPTH CASING DEPTH GROUT TYPE DRILLER: Not Applicable SAMPLING HAMMER WT HAMMER FALL OVERSIGHT: Jeremy Grant ORGANIC SAMPLER DEPTH SAMPLE VAPOR BLOWS SAMPLE IN SCREENING PER NUMBER DEPTH FIELD CLASSIFICATION AND REMARKS FEET RANGE (PPM) 6 INCHES SOIL CLASSIFICATION: USCS Light tan to brown fine to medium grained sand. Slightly moist.

1 Brown fine to medium grained sand. Some silt. Slightly moist..

2 Tan fine grained sand. Few silt. Dry.

Tan fine grained sandy silt. Slightly moist.

5.0 3 Light yellow clayey silt. Some fine sand. Slightly moist.

Tan fine to medium grained silty sand. Slightly moist.

4 Light tan fine grained sand. Some silt. Slightly moist.

5 Light tan fine grained silty sand. Moist.

10.0 15.0 20.0 BLOWS/FT. DENSITY BLOWS/FT. CONSISTENCY SAMPLER ID. DESCRIPTIONS NOTES 0-4 VERY LOOSE 0-2 VERY SOFT SS SPLIT SPOON MOSTLY 50-100% WD WHILE DRILLING 5-10 LOOSE 3-4 SOFT ST SHELBY TUBE SOME 30-45% NE NOT ENCOUNTERED 11-30 MEDIUM DENSE 5-8 MEDIUM STIFF G GRAB SAMPLE LITTLE 15-25% UR NOT READ 31-50 DENSE 9-15 STIFF MC MACRO-CORE FEW 5-10% NR NO RECOVERY 50+ VERY DENSE 16-30 VERY STIFF TRACE <5%

31+ HARD

Soil Boring Report BORING NO.

PAGE 1 OF HF1-B2 1

PROJECT: HF Spiking Station #1 PROJECT NO: 60633543 CLIENT: Westinghouse LOCATION: Hopkins, SC CONTRACTOR: AECOM ELEVATION:

EQUIPMENT: Stainless Steel Hand Auger NORTHING:

GROUNDWATER DRILLING INFORMATION EASTING:

DATE HRS WATER METHOD CASING TEMP / PERM DATE START: 5/5/2020 HOLE DIA. CASING DIA. CASING TYPE DATE FINISH: 5/5/2020 DEPTH CASING DEPTH GROUT TYPE DRILLER: Not Applicable SAMPLING HAMMER WT HAMMER FALL OVERSIGHT: Jeremy Grant ORGANIC SAMPLER DEPTH SAMPLE VAPOR BLOWS SAMPLE IN SCREENING PER NUMBER DEPTH FIELD CLASSIFICATION AND REMARKS FEET RANGE (PPM) 6 INCHES SOIL CLASSIFICATION: USCS Light tan fine to medium grained sand.Dry.

Dark brown fine to medium grained silty sand. Slightly moist.

1 Reddish brown silty clay. Some fine sand. Slightly moist.

Light brown fine to medium grained sand. Few silt. Slightly moist.

2 Tan fine grained sand. Few silt. Dry.

Light brown fine grained sandy silt. Few clay. Slightly moist.

5.0 3 Light brown fine grained sandy silt. Few clay. Slightly moist.

Tan fine grained sand. Few silt. Slightly moist.

4 Grey and tan fine to medium grained silty sand. Moist.

5 10.0 15.0 20.0 BLOWS/FT. DENSITY BLOWS/FT. CONSISTENCY SAMPLER ID. DESCRIPTIONS NOTES 0-4 VERY LOOSE 0-2 VERY SOFT SS SPLIT SPOON MOSTLY 50-100% WD WHILE DRILLING 5-10 LOOSE 3-4 SOFT ST SHELBY TUBE SOME 30-45% NE NOT ENCOUNTERED 11-30 MEDIUM DENSE 5-8 MEDIUM STIFF G GRAB SAMPLE LITTLE 15-25% UR NOT READ 31-50 DENSE 9-15 STIFF MC MACRO-CORE FEW 5-10% NR NO RECOVERY 50+ VERY DENSE 16-30 VERY STIFF TRACE <5%

31+ HARD

Soil Boring Report BORING NO.

PAGE 1 OF HF1-B3 1

PROJECT: HF Spiking Station #1 PROJECT NO: 60633543 CLIENT: Westinghouse LOCATION: Hopkins, SC CONTRACTOR: AECOM ELEVATION:

EQUIPMENT: Stainless Steel Hand Auger NORTHING:

GROUNDWATER DRILLING INFORMATION EASTING:

DATE HRS WATER METHOD CASING TEMP / PERM DATE START: 5/5/2020 HOLE DIA. CASING DIA. CASING TYPE DATE FINISH: 5/5/2020 DEPTH CASING DEPTH GROUT TYPE DRILLER: Not Applicable SAMPLING HAMMER WT HAMMER FALL OVERSIGHT: Jeremy Grant ORGANIC SAMPLER DEPTH SAMPLE VAPOR BLOWS SAMPLE IN SCREENING PER NUMBER DEPTH FIELD CLASSIFICATION AND REMARKS FEET RANGE (PPM) 6 INCHES SOIL CLASSIFICATION: USCS Light tan fine grained sand. Dry.

Brown fine to medium grained sand. Some silt. Slightly moist.

1 Orangish brown clayey sit. Few fine grained sand. Slightly moist.

2 Tan fine grained sand. Few silt. Slightly moist.

Tan fine grained silty sand. Slightly moist.

5.0 3 Tan fine grained sandy silt. Slightly moist.

Tan fine to medium grained silty sand. Slightly moist.

4 Light brown and grey fine to medium grained sand. Some silt.Slightly moist.

5 Light tan medium to coarse grained sand. Some silt. Moist.

10.0 15.0 20.0 BLOWS/FT. DENSITY BLOWS/FT. CONSISTENCY SAMPLER ID. DESCRIPTIONS NOTES 0-4 VERY LOOSE 0-2 VERY SOFT SS SPLIT SPOON MOSTLY 50-100% WD WHILE DRILLING 5-10 LOOSE 3-4 SOFT ST SHELBY TUBE SOME 30-45% NE NOT ENCOUNTERED 11-30 MEDIUM DENSE 5-8 MEDIUM STIFF G GRAB SAMPLE LITTLE 15-25% UR NOT READ 31-50 DENSE 9-15 STIFF MC MACRO-CORE FEW 5-10% NR NO RECOVERY 50+ VERY DENSE 16-30 VERY STIFF TRACE <5%

31+ HARD

Soil Boring Report BORING NO.

PAGE 1 OF HF1-B4 1

PROJECT: HF Spiking Station #1 PROJECT NO: 60633543 CLIENT: Westinghouse LOCATION: Hopkins, SC CONTRACTOR: AECOM ELEVATION:

EQUIPMENT: Stainless Steel Hand Auger NORTHING:

GROUNDWATER DRILLING INFORMATION EASTING:

DATE HRS WATER METHOD CASING TEMP / PERM DATE START: 5/6/2020 HOLE DIA. CASING DIA. CASING TYPE DATE FINISH: 5/6/2020 DEPTH CASING DEPTH GROUT TYPE DRILLER: Not Applicable SAMPLING HAMMER WT HAMMER FALL OVERSIGHT: Jeremy Grant ORGANIC SAMPLER DEPTH SAMPLE VAPOR BLOWS SAMPLE IN SCREENING PER NUMBER DEPTH FIELD CLASSIFICATION AND REMARKS FEET RANGE (PPM) 6 INCHES SOIL CLASSIFICATION: USCS Light tan to brown fine to medium grained sand. Slightly moist.

1 2

5.0 3

Hand auger refusal at 5.33 feet.

10.0 15.0 20.0 BLOWS/FT. DENSITY BLOWS/FT. CONSISTENCY SAMPLER ID. DESCRIPTIONS NOTES 0-4 VERY LOOSE 0-2 VERY SOFT SS SPLIT SPOON MOSTLY 50-100% WD WHILE DRILLING 5-10 LOOSE 3-4 SOFT ST SHELBY TUBE SOME 30-45% NE NOT ENCOUNTERED 11-30 MEDIUM DENSE 5-8 MEDIUM STIFF G GRAB SAMPLE LITTLE 15-25% UR NOT READ 31-50 DENSE 9-15 STIFF MC MACRO-CORE FEW 5-10% NR NO RECOVERY 50+ VERY DENSE 16-30 VERY STIFF TRACE <5%

31+ HARD

Soil Boring Report BORING NO.

PAGE 1 OF HF1-B5 1

PROJECT: HF Spiking Station #1 PROJECT NO: 60633543 CLIENT: Westinghouse LOCATION: Hopkins, SC CONTRACTOR: AECOM ELEVATION:

EQUIPMENT: Stainless Steel Hand Auger NORTHING:

GROUNDWATER DRILLING INFORMATION EASTING:

DATE HRS WATER METHOD CASING TEMP / PERM DATE START: 5/6/2020 HOLE DIA. CASING DIA. CASING TYPE DATE FINISH: 5/6/2020 DEPTH CASING DEPTH GROUT TYPE DRILLER: Not Applicable SAMPLING HAMMER WT HAMMER FALL OVERSIGHT: Jeremy Grant ORGANIC SAMPLER DEPTH SAMPLE VAPOR BLOWS SAMPLE IN SCREENING PER NUMBER DEPTH FIELD CLASSIFICATION AND REMARKS FEET RANGE (PPM) 6 INCHES SOIL CLASSIFICATION: USCS Light tan to brown fine to medium grained sand. Dry.

Brown fine to medium grained silty sand. Slightly moist.

1 Brown fine to medium grained sand. Few silt. Slightly moist.

Reddish brown silty clay. Some fine grained sand. Slightly moist.

2 Brown fine to medium grained sand. Some silt. Slightly moist.

Tan fine grained sandy silt. Some clay. Slightly moist.

5.0 3 Light brown fine grained sandy silt. Few clay. Slightly moist.

Tan clayey silt. Few fine grained sand. Slightly moist.

Tan fine grained silty sand. Slightly moist.

4 Light tan fine grained sand. Some silt. Slightly moist.

Grey and tan fine to coarse grained silty sand. Moist.

5 10.0 15.0 20.0 BLOWS/FT. DENSITY BLOWS/FT. CONSISTENCY SAMPLER ID. DESCRIPTIONS NOTES 0-4 VERY LOOSE 0-2 VERY SOFT SS SPLIT SPOON MOSTLY 50-100% WD WHILE DRILLING 5-10 LOOSE 3-4 SOFT ST SHELBY TUBE SOME 30-45% NE NOT ENCOUNTERED 11-30 MEDIUM DENSE 5-8 MEDIUM STIFF G GRAB SAMPLE LITTLE 15-25% UR NOT READ 31-50 DENSE 9-15 STIFF MC MACRO-CORE FEW 5-10% NR NO RECOVERY 50+ VERY DENSE 16-30 VERY STIFF TRACE <5%

31+ HARD

Soil Boring Report BORING NO.

PAGE 1 OF HF1-B6 1

PROJECT: HF Spiking Station #1 PROJECT NO: 60633543 CLIENT: Westinghouse LOCATION: Hopkins, SC CONTRACTOR: AECOM ELEVATION:

EQUIPMENT: Stainless Steel Hand Auger NORTHING:

GROUNDWATER DRILLING INFORMATION EASTING:

DATE HRS WATER METHOD CASING TEMP / PERM DATE START: 5/6/2020 HOLE DIA. CASING DIA. CASING TYPE DATE FINISH: 5/6/2020 DEPTH CASING DEPTH GROUT TYPE DRILLER: Not Applicable SAMPLING HAMMER WT HAMMER FALL OVERSIGHT: Jeremy Grant ORGANIC SAMPLER DEPTH SAMPLE VAPOR BLOWS SAMPLE IN SCREENING PER NUMBER DEPTH FIELD CLASSIFICATION AND REMARKS FEET RANGE (PPM) 6 INCHES SOIL CLASSIFICATION: USCS Light tan to brown fine to medium grained sand. Slightly moist.

1 2

5.0 3

Hand auger refusal at 5.67 feet.

10.0 15.0 20.0 BLOWS/FT. DENSITY BLOWS/FT. CONSISTENCY SAMPLER ID. DESCRIPTIONS NOTES 0-4 VERY LOOSE 0-2 VERY SOFT SS SPLIT SPOON MOSTLY 50-100% WD WHILE DRILLING 5-10 LOOSE 3-4 SOFT ST SHELBY TUBE SOME 30-45% NE NOT ENCOUNTERED 11-30 MEDIUM DENSE 5-8 MEDIUM STIFF G GRAB SAMPLE LITTLE 15-25% UR NOT READ 31-50 DENSE 9-15 STIFF MC MACRO-CORE FEW 5-10% NR NO RECOVERY 50+ VERY DENSE 16-30 VERY STIFF TRACE <5%

31+ HARD

Soil Boring Report BORING NO.

PAGE 1 OF HF1-B7 1

PROJECT: HF Spiking Station #1 PROJECT NO: 60633543 CLIENT: Westinghouse LOCATION: Hopkins, SC CONTRACTOR: AECOM ELEVATION:

EQUIPMENT: Stainless Steel Hand Auger NORTHING:

GROUNDWATER DRILLING INFORMATION EASTING:

DATE HRS WATER METHOD CASING TEMP / PERM DATE START: 5/6/2020 HOLE DIA. CASING DIA. CASING TYPE DATE FINISH: 5/6/2020 DEPTH CASING DEPTH GROUT TYPE DRILLER: Not Applicable SAMPLING HAMMER WT HAMMER FALL OVERSIGHT: Jeremy Grant ORGANIC SAMPLER DEPTH SAMPLE VAPOR BLOWS SAMPLE IN SCREENING PER NUMBER DEPTH FIELD CLASSIFICATION AND REMARKS FEET RANGE (PPM) 6 INCHES SOIL CLASSIFICATION: USCS Light tan to brown fine to medium grained sand. Slightly moist.

1 2

5.0 3

Hand auger refusal at 5.42 feet. Grab sample also collected at refusal depth.

10.0 15.0 20.0 BLOWS/FT. DENSITY BLOWS/FT. CONSISTENCY SAMPLER ID. DESCRIPTIONS NOTES 0-4 VERY LOOSE 0-2 VERY SOFT SS SPLIT SPOON MOSTLY 50-100% WD WHILE DRILLING 5-10 LOOSE 3-4 SOFT ST SHELBY TUBE SOME 30-45% NE NOT ENCOUNTERED 11-30 MEDIUM DENSE 5-8 MEDIUM STIFF G GRAB SAMPLE LITTLE 15-25% UR NOT READ 31-50 DENSE 9-15 STIFF MC MACRO-CORE FEW 5-10% NR NO RECOVERY 50+ VERY DENSE 16-30 VERY STIFF TRACE <5%

31+ HARD

HF Spiking Station #1 Assessment Report Westinghouse Columbia Fuel Fabrication Facility AECOM Project No. 60633543 Hopkins, South Carolina APPENDIX B LABORATORY ANALYTICAL RESULTS hfss 1 assessment report_july 2020.docx July 2020

May 28, 2020 Ms. Cynthia Logsdon Westinghouse Electric Company, LLC PO Drawer R Columbia, South Carolina 29205 Re: Soil and Vegetation Analysis Work Order: 510581

Dear Ms. Logsdon:

GEL Laboratories, LLC (GEL) appreciates the opportunity to provide the enclosed analytical results for the sample(s) we received on May 05, 2020. This original data report has been prepared and reviewed in accordance with GELs standard operating procedures.

Test results for NELAP or ISO 17025 accredited tests are verified to meet the requirements of those standards, with any exceptions noted. The results reported relate only to the items tested and to the sample as received by the laboratory. These results may not be reproduced except as full reports without approval by the laboratory.

Copies of GELs accreditations and certifications can be found on our website at www.gel.com.

Our policy is to provide high quality, personalized analytical services to enable you to meet your analytical needs on time every time. We trust that you will find everything in order and to your satisfaction. If you have any questions, please do not hesitate to call me at (843) 556-8171, ext. 4707.

Sincerely, PM_SIGN_HERE Katelyn Gray Project Manager Purchase Order: 4500799254 Enclosures Page 1 of 26 SDG: 510581

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 (843) 5568171 www.gel.com Certificate of Analysis Report for WNUC008 Westinghouse Electric Co, LLC (4500775170)

Client SDG: 510581 GEL Work Order: 510581 The Qualifiers in this report are defined as follows:

A quality control analyte recovery is outside of specified acceptance criteria

- Analyte is a Tracer compound

- Analyte is a surrogate compound H Analytical holding time was exceeded U Analyte was analyzed for, but not detected above the MDL, MDA, MDC or LOD.

Where the analytical method has been performed under NELAP certification, the analysis has met all of the requirements of the NELAC standard unless qualified on the Certificate of Analysis.

The designation ND, if present, appears in the result column when the analyte concentration is not detected above the limit as defined in the U qualifier above.

This data report has been prepared and reviewed in accordance with GEL Laboratories LLC standard operating procedures. Please direct any questions to your Project Manager, Katelyn Gray.

Reviewed by USER_SIGN_HERE Page 2 of 26 SDG: 510581

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Certificate of Analysis Report Date: May 28, 2020 Company : Westinghouse Electric Company, LLC Address : PO Drawer R Columbia, South Carolina 29205

Contact:

Ms. Cynthia Logsdon Project: Soil and Vegetation Analysis Client Sample ID: HF1-B1-(1-2) Project: WNUC00821 Sample ID: 510581001 Client ID: WNUC008 Matrix: Soil Collect Date: 04-MAY-20 13:13 Receive Date: 05-MAY-20 Collector: Client Moisture: 7.46%

Parameter Qualifier Result DL RL Units PF DF Analyst Date Time Batch Method Ion Chromatography SW846 9056A Fluoride and Nitrate "Dry Weight Corrected" Fluoride 28.3 0.366 1.08 mg/kg 9.95 1 JLD1 05/05/20 1932 1994861 1 Nitrate-N 180 1.77 5.38 mg/kg 9.95 5 JLD1 05/06/20 0110 1994861 2 Titration and Ion Analysis SW9045D Corrosivity (pH<2or>14) "As Received" Corrosivity H 4.81 0.0100 0.100 SU 1 RXB5 05/07/20 1446 1994735 3 The following Prep Methods were performed:

Method Description Analyst Date Time Prep Batch SW846 9056A SW846 9056A Total Anions in Soil CJ2 05/05/20 1814 1994849 The following Analytical Methods were performed:

Method Description Analyst Comments 1 SW846 9056A 2 SW846 9056A 3 SW846 9045D Notes:

Column headers are defined as follows:

DF: Dilution Factor Lc/LC: Critical Level DL: Detection Limit PF: Prep Factor MDA: Minimum Detectable Activity RL: Reporting Limit MDC: Minimum Detectable Concentration SQL: Sample Quantitation Limit Page 3 of 26 SDG: 510581

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Certificate of Analysis Report Date: May 28, 2020 Company : Westinghouse Electric Company, LLC Address : PO Drawer R Columbia, South Carolina 29205

Contact:

Ms. Cynthia Logsdon Project: Soil and Vegetation Analysis Client Sample ID: HF1-B1-(2-4) Project: WNUC00821 Sample ID: 510581002 Client ID: WNUC008 Matrix: Soil Collect Date: 04-MAY-20 13:43 Receive Date: 05-MAY-20 Collector: Client Moisture: 7.57%

Parameter Qualifier Result DL RL Units PF DF Analyst Date Time Batch Method Ion Chromatography SW846 9056A Fluoride and Nitrate "Dry Weight Corrected" Fluoride 706 7.38 21.7 mg/kg 10.0 20 JLD1 05/06/20 0243 1994861 1 Nitrate-N 707 7.16 21.7 mg/kg 10.0 20 Titration and Ion Analysis SW9045D Corrosivity (pH<2or>14) "As Received" Corrosivity H 4.02 0.0100 0.100 SU 1 RXB5 05/07/20 1448 1994735 2 The following Prep Methods were performed:

Method Description Analyst Date Time Prep Batch SW846 9056A SW846 9056A Total Anions in Soil CJ2 05/05/20 1814 1994849 The following Analytical Methods were performed:

Method Description Analyst Comments 1 SW846 9056A 2 SW846 9045D Notes:

Column headers are defined as follows:

DF: Dilution Factor Lc/LC: Critical Level DL: Detection Limit PF: Prep Factor MDA: Minimum Detectable Activity RL: Reporting Limit MDC: Minimum Detectable Concentration SQL: Sample Quantitation Limit Page 4 of 26 SDG: 510581

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Certificate of Analysis Report Date: May 28, 2020 Company : Westinghouse Electric Company, LLC Address : PO Drawer R Columbia, South Carolina 29205

Contact:

Ms. Cynthia Logsdon Project: Soil and Vegetation Analysis Client Sample ID: HF1-B1-(4-6) Project: WNUC00821 Sample ID: 510581003 Client ID: WNUC008 Matrix: Soil Collect Date: 04-MAY-20 14:58 Receive Date: 05-MAY-20 Collector: Client Moisture: 11.8%

Parameter Qualifier Result DL RL Units PF DF Analyst Date Time Batch Method Ion Chromatography SW846 9056A Fluoride and Nitrate "Dry Weight Corrected" Fluoride 1500 19.1 56.1 mg/kg 9.90 50 JLD1 05/06/20 0314 1994861 1 Nitrate-N 1240 18.5 56.1 mg/kg 9.90 50 Titration and Ion Analysis SW9045D Corrosivity (pH<2or>14) "As Received" Corrosivity H 3.88 0.0100 0.100 SU 1 RXB5 05/07/20 1449 1994735 2 The following Prep Methods were performed:

Method Description Analyst Date Time Prep Batch SW846 9056A SW846 9056A Total Anions in Soil CJ2 05/05/20 1814 1994849 The following Analytical Methods were performed:

Method Description Analyst Comments 1 SW846 9056A 2 SW846 9045D Notes:

Column headers are defined as follows:

DF: Dilution Factor Lc/LC: Critical Level DL: Detection Limit PF: Prep Factor MDA: Minimum Detectable Activity RL: Reporting Limit MDC: Minimum Detectable Concentration SQL: Sample Quantitation Limit Page 5 of 26 SDG: 510581

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Certificate of Analysis Report Date: May 28, 2020 Company : Westinghouse Electric Company, LLC Address : PO Drawer R Columbia, South Carolina 29205

Contact:

Ms. Cynthia Logsdon Project: Soil and Vegetation Analysis Client Sample ID: HF1-B1-(6-8) Project: WNUC00821 Sample ID: 510581004 Client ID: WNUC008 Matrix: Soil Collect Date: 04-MAY-20 16:10 Receive Date: 05-MAY-20 Collector: Client Moisture: 11.6%

Parameter Qualifier Result DL RL Units PF DF Analyst Date Time Batch Method Ion Chromatography SW846 9056A Fluoride and Nitrate "Dry Weight Corrected" Fluoride 936 9.45 27.8 mg/kg 9.83 25 JLD1 05/06/20 0345 1994861 1 Nitrate-N 971 9.17 27.8 mg/kg 9.83 25 Titration and Ion Analysis SW9045D Corrosivity (pH<2or>14) "As Received" Corrosivity H 4.03 0.0100 0.100 SU 1 RXB5 05/07/20 1450 1994735 2 The following Prep Methods were performed:

Method Description Analyst Date Time Prep Batch SW846 9056A SW846 9056A Total Anions in Soil CJ2 05/05/20 1814 1994849 The following Analytical Methods were performed:

Method Description Analyst Comments 1 SW846 9056A 2 SW846 9045D Notes:

Column headers are defined as follows:

DF: Dilution Factor Lc/LC: Critical Level DL: Detection Limit PF: Prep Factor MDA: Minimum Detectable Activity RL: Reporting Limit MDC: Minimum Detectable Concentration SQL: Sample Quantitation Limit Page 6 of 26 SDG: 510581

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Certificate of Analysis Report Date: May 28, 2020 Company : Westinghouse Electric Company, LLC Address : PO Drawer R Columbia, South Carolina 29205

Contact:

Ms. Cynthia Logsdon Project: Soil and Vegetation Analysis Client Sample ID: HF1-B1-(8-10) Project: WNUC00821 Sample ID: 510581005 Client ID: WNUC008 Matrix: Soil Collect Date: 04-MAY-20 17:02 Receive Date: 05-MAY-20 Collector: Client Moisture: 12.8%

Parameter Qualifier Result DL RL Units PF DF Analyst Date Time Batch Method Ion Chromatography SW846 9056A Fluoride and Nitrate "Dry Weight Corrected" Fluoride 96.4 3.90 11.5 mg/kg 10.0 10 JLD1 05/06/20 0415 1994861 1 Nitrate-N 303 3.79 11.5 mg/kg 10.0 10 Titration and Ion Analysis SW9045D Corrosivity (pH<2or>14) "As Received" Corrosivity H 4.26 0.0100 0.100 SU 1 RXB5 05/07/20 1451 1994735 2 The following Prep Methods were performed:

Method Description Analyst Date Time Prep Batch SW846 9056A SW846 9056A Total Anions in Soil CJ2 05/05/20 1814 1994849 The following Analytical Methods were performed:

Method Description Analyst Comments 1 SW846 9056A 2 SW846 9045D Notes:

Column headers are defined as follows:

DF: Dilution Factor Lc/LC: Critical Level DL: Detection Limit PF: Prep Factor MDA: Minimum Detectable Activity RL: Reporting Limit MDC: Minimum Detectable Concentration SQL: Sample Quantitation Limit Page 7 of 26 SDG: 510581

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Certificate of Analysis Report Date: May 28, 2020 Company : Westinghouse Electric Company, LLC Address : PO Drawer R Columbia, South Carolina 29205

Contact:

Ms. Cynthia Logsdon Project: Soil and Vegetation Analysis Client Sample ID: HF1-B1-(1-2) Project: WNUC00821 Sample ID: 510581001 Client ID: WNUC008 Matrix: Soil Collect Date: 04-MAY-20 13:13 Receive Date: 05-MAY-20 Collector: Client Moisture: 7.46%

Parameter Qualifier Result Uncertainty MDC RL Units PF DF Analyst Date Time Batch Method Rad Alpha Spec Analysis Alphaspec U, Soil/Veg "Dry Weight Corrected" Uranium-233/234 13.2 +/-0.986 0.221 0.500 pCi/g HAKB 05/09/20 1307 1994680 1 Uranium-235/236 0.828 +/-0.286 0.186 0.500 pCi/g Uranium-238 3.22 +/-0.486 0.111 0.500 pCi/g Rad Liquid Scintillation Analysis Liquid Scint Tc99, Soil "As Received" Technetium-99 U 0.447 +/-1.94 3.34 5.00 pCi/g JJ3 05/10/20 0542 1994733 2 The following Prep Methods were performed:

Method Description Analyst Date Time Prep Batch Dry Soil Prep Dry Soil Prep GL-RAD-A-021 CXC1 05/05/20 1018 1994664 The following Analytical Methods were performed:

Method Description Analyst Comments 1 DOE EML HASL-300, U-02-RC Modified 2 DOE EML HASL-300, Tc-02-RC Modified Surrogate/Tracer Recovery Test Result Nominal Recovery% Acceptable Limits Uranium-232 Tracer Alphaspec U, Soil/Veg "Dry Weight Corrected" 81.9 (15%-125%)

Technetium-99m Tracer Liquid Scint Tc99, Soil "As Received" 97.3 (15%-125%)

Notes:

Counting Uncertainty is calculated at the 95% confidence level (1.96-sigma).

Column headers are defined as follows:

DF: Dilution Factor Lc/LC: Critical Level DL: Detection Limit PF: Prep Factor MDA: Minimum Detectable Activity RL: Reporting Limit MDC: Minimum Detectable Concentration SQL: Sample Quantitation Limit Page 8 of 26 SDG: 510581

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Certificate of Analysis Report Date: May 28, 2020 Company : Westinghouse Electric Company, LLC Address : PO Drawer R Columbia, South Carolina 29205

Contact:

Ms. Cynthia Logsdon Project: Soil and Vegetation Analysis Client Sample ID: HF1-B1-(2-4) Project: WNUC00821 Sample ID: 510581002 Client ID: WNUC008 Matrix: Soil Collect Date: 04-MAY-20 13:43 Receive Date: 05-MAY-20 Collector: Client Moisture: 7.57%

Parameter Qualifier Result Uncertainty MDC RL Units PF DF Analyst Date Time Batch Method Rad Alpha Spec Analysis Alphaspec U, Soil/Veg "Dry Weight Corrected" Uranium-233/234 8310 +/-213 11.4 0.500 pCi/g HAKB 05/11/20 1159 1995912 1 Uranium-235/236 465 +/-56.2 5.28 0.500 pCi/g Uranium-238 1620 +/-94.3 8.12 0.500 pCi/g Rad Liquid Scintillation Analysis Liquid Scint Tc99, Soil "As Received" Technetium-99 U 0.880 +/-2.19 3.75 5.00 pCi/g JJ3 05/10/20 0603 1994733 2 The following Prep Methods were performed:

Method Description Analyst Date Time Prep Batch Dry Soil Prep Dry Soil Prep GL-RAD-A-021 CXC1 05/05/20 1018 1994664 The following Analytical Methods were performed:

Method Description Analyst Comments 1 DOE EML HASL-300, U-02-RC Modified 2 DOE EML HASL-300, Tc-02-RC Modified Surrogate/Tracer Recovery Test Result Nominal Recovery% Acceptable Limits Uranium-232 Tracer Alphaspec U, Soil/Veg "Dry Weight Corrected" 62 (15%-125%)

Technetium-99m Tracer Liquid Scint Tc99, Soil "As Received" 94.5 (15%-125%)

Notes:

Counting Uncertainty is calculated at the 95% confidence level (1.96-sigma).

Column headers are defined as follows:

DF: Dilution Factor Lc/LC: Critical Level DL: Detection Limit PF: Prep Factor MDA: Minimum Detectable Activity RL: Reporting Limit MDC: Minimum Detectable Concentration SQL: Sample Quantitation Limit Page 9 of 26 SDG: 510581

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Certificate of Analysis Report Date: May 28, 2020 Company : Westinghouse Electric Company, LLC Address : PO Drawer R Columbia, South Carolina 29205

Contact:

Ms. Cynthia Logsdon Project: Soil and Vegetation Analysis Client Sample ID: HF1-B1-(4-6) Project: WNUC00821 Sample ID: 510581003 Client ID: WNUC008 Matrix: Soil Collect Date: 04-MAY-20 14:58 Receive Date: 05-MAY-20 Collector: Client Moisture: 11.8%

Parameter Qualifier Result Uncertainty MDC RL Units PF DF Analyst Date Time Batch Method Rad Alpha Spec Analysis Alphaspec U, Soil/Veg "Dry Weight Corrected" Uranium-233/234 10100 +/-239 9.20 0.500 pCi/g HAKB 05/11/20 1159 1995912 1 Uranium-235/236 436 +/-55.3 7.65 0.500 pCi/g Uranium-238 1680 +/-97.6 8.76 0.500 pCi/g Rad Liquid Scintillation Analysis Liquid Scint Tc99, Soil "As Received" Technetium-99 U 0.0772 +/-2.09 3.63 5.00 pCi/g JJ3 05/10/20 0625 1994733 2 The following Prep Methods were performed:

Method Description Analyst Date Time Prep Batch Dry Soil Prep Dry Soil Prep GL-RAD-A-021 CXC1 05/05/20 1018 1994664 The following Analytical Methods were performed:

Method Description Analyst Comments 1 DOE EML HASL-300, U-02-RC Modified 2 DOE EML HASL-300, Tc-02-RC Modified Surrogate/Tracer Recovery Test Result Nominal Recovery% Acceptable Limits Uranium-232 Tracer Alphaspec U, Soil/Veg "Dry Weight Corrected" 67.1 (15%-125%)

Technetium-99m Tracer Liquid Scint Tc99, Soil "As Received" 95.8 (15%-125%)

Notes:

Counting Uncertainty is calculated at the 95% confidence level (1.96-sigma).

Column headers are defined as follows:

DF: Dilution Factor Lc/LC: Critical Level DL: Detection Limit PF: Prep Factor MDA: Minimum Detectable Activity RL: Reporting Limit MDC: Minimum Detectable Concentration SQL: Sample Quantitation Limit Page 10 of 26 SDG: 510581

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Certificate of Analysis Report Date: May 28, 2020 Company : Westinghouse Electric Company, LLC Address : PO Drawer R Columbia, South Carolina 29205

Contact:

Ms. Cynthia Logsdon Project: Soil and Vegetation Analysis Client Sample ID: HF1-B1-(6-8) Project: WNUC00821 Sample ID: 510581004 Client ID: WNUC008 Matrix: Soil Collect Date: 04-MAY-20 16:10 Receive Date: 05-MAY-20 Collector: Client Moisture: 11.6%

Parameter Qualifier Result Uncertainty MDC RL Units PF DF Analyst Date Time Batch Method Rad Alpha Spec Analysis Alphaspec U, Soil/Veg "Dry Weight Corrected" Uranium-233/234 4500 +/-119 4.20 0.500 pCi/g HAKB 05/07/20 2115 1994680 1 Uranium-235/236 252 +/-31.3 4.22 0.500 pCi/g Uranium-238 802 +/-50.2 3.97 0.500 pCi/g Rad Liquid Scintillation Analysis Liquid Scint Tc99, Soil "As Received" Technetium-99 U 0.871 +/-2.06 3.53 5.00 pCi/g JJ3 05/10/20 0647 1994733 2 The following Prep Methods were performed:

Method Description Analyst Date Time Prep Batch Dry Soil Prep Dry Soil Prep GL-RAD-A-021 CXC1 05/05/20 1018 1994664 The following Analytical Methods were performed:

Method Description Analyst Comments 1 DOE EML HASL-300, U-02-RC Modified 2 DOE EML HASL-300, Tc-02-RC Modified Surrogate/Tracer Recovery Test Result Nominal Recovery% Acceptable Limits Uranium-232 Tracer Alphaspec U, Soil/Veg "Dry Weight Corrected" 15 (15%-125%)

Technetium-99m Tracer Liquid Scint Tc99, Soil "As Received" 96.1 (15%-125%)

Notes:

Counting Uncertainty is calculated at the 95% confidence level (1.96-sigma).

Column headers are defined as follows:

DF: Dilution Factor Lc/LC: Critical Level DL: Detection Limit PF: Prep Factor MDA: Minimum Detectable Activity RL: Reporting Limit MDC: Minimum Detectable Concentration SQL: Sample Quantitation Limit Page 11 of 26 SDG: 510581

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Certificate of Analysis Report Date: May 28, 2020 Company : Westinghouse Electric Company, LLC Address : PO Drawer R Columbia, South Carolina 29205

Contact:

Ms. Cynthia Logsdon Project: Soil and Vegetation Analysis Client Sample ID: HF1-B1-(8-10) Project: WNUC00821 Sample ID: 510581005 Client ID: WNUC008 Matrix: Soil Collect Date: 04-MAY-20 17:02 Receive Date: 05-MAY-20 Collector: Client Moisture: 12.8%

Parameter Qualifier Result Uncertainty MDC RL Units PF DF Analyst Date Time Batch Method Rad Alpha Spec Analysis Alphaspec U, Soil/Veg "Dry Weight Corrected" Uranium-233/234 1440 +/-43.8 1.98 0.500 pCi/g HAKB 05/07/20 2115 1994680 1 Uranium-235/236 79.4 +/-11.5 1.79 0.500 pCi/g Uranium-238 263 +/-18.7 1.69 0.500 pCi/g Rad Liquid Scintillation Analysis Liquid Scint Tc99, Soil "As Received" Technetium-99 U 0.656 +/-2.13 3.65 5.00 pCi/g JJ3 05/10/20 0708 1994733 2 The following Prep Methods were performed:

Method Description Analyst Date Time Prep Batch Dry Soil Prep Dry Soil Prep GL-RAD-A-021 CXC1 05/05/20 1018 1994664 The following Analytical Methods were performed:

Method Description Analyst Comments 1 DOE EML HASL-300, U-02-RC Modified 2 DOE EML HASL-300, Tc-02-RC Modified Surrogate/Tracer Recovery Test Result Nominal Recovery% Acceptable Limits Uranium-232 Tracer Alphaspec U, Soil/Veg "Dry Weight Corrected" 31.5 (15%-125%)

Technetium-99m Tracer Liquid Scint Tc99, Soil "As Received" 92.7 (15%-125%)

Notes:

Counting Uncertainty is calculated at the 95% confidence level (1.96-sigma).

Column headers are defined as follows:

DF: Dilution Factor Lc/LC: Critical Level DL: Detection Limit PF: Prep Factor MDA: Minimum Detectable Activity RL: Reporting Limit MDC: Minimum Detectable Concentration SQL: Sample Quantitation Limit Page 12 of 26 SDG: 510581

GEL LABORATORIES LLC 2040 Savage Road Charleston, SC 29407 - (843) 556-8171 - www.gel.com QC Summary Report Date: May 28, 2020 Westinghouse Electric Company, LLC Page 1 of 2 PO Drawer R Columbia, South Carolina

Contact:

Ms. Cynthia Logsdon Workorder: 510581 Parmname NOM Sample Qual QC Units RPD% REC% Range Anlst Date Time Ion Chromatography Batch 1994861 QC1204556272 510581001 DUP Fluoride 28.3 37.9 mg/kg 29.1 (0%-109%) JLD1 05/05/20 23:07 Nitrate-N 180 238 mg/kg 28 (0%-104%) 05/06/20 01:41 QC1204556271 LCS Fluoride 25.3 24.1 mg/kg 95.6 (90%-110%) 05/05/20 22:36 Nitrate-N 25.3 24.8 mg/kg 98.2 (90%-110%)

QC1204556270 MB Fluoride U ND mg/kg 05/05/20 22:05 Nitrate-N U ND mg/kg QC1204556273 510581001 MS Fluoride 26.9 28.3 40.8 mg/kg 46.8 * (75%-125%) 05/05/20 23:38 Nitrate-N 26.9 180 221 mg/kg N/A (75%-125%) 05/06/20 02:12 Titration and Ion Analysis Batch 1994735 QC1204556044 510581001 DUP Corrosivity H 4.81 H 5.15 SU 6.83 (0%-10%) RXB5 05/07/20 14:47 QC1204556042 LCS Corrosivity 7.00 7.00 SU 100 (95%-105%) 05/07/20 14:42 Notes:

The Qualifiers in this report are defined as follows:

< Result is less than value reported Page 13 of 26 SDG: 510581

GEL LABORATORIES LLC 2040 Savage Road Charleston, SC 29407 - (843) 556-8171 - www.gel.com QC Summary Workorder: 510581 Page 2 of 2 Parmname NOM Sample Qual QC Units RPD% REC% Range Anlst Date Time

> Result is greater than value reported B The target analyte was detected in the associated blank.

E General Chemistry--Concentration of the target analyte exceeds the instrument calibration range H Analytical holding time was exceeded J See case narrative for an explanation J Value is estimated N/A RPD or %Recovery limits do not apply.

N1 See case narrative ND Analyte concentration is not detected above the detection limit NJ Consult Case Narrative, Data Summary package, or Project Manager concerning this qualifier Q One or more quality control criteria have not been met. Refer to the applicable narrative or DER.

R Per section 9.3.4.1 of Method 1664 Revision B, due to matrix spike recovery issues, this result may not be reported or used for regulatory compliance purposes.

R Sample results are rejected U Analyte was analyzed for, but not detected above the MDL, MDA, MDC or LOD.

X Consult Case Narrative, Data Summary package, or Project Manager concerning this qualifier Z Paint Filter Test--Particulates passed through the filter, however no free liquids were observed.

^ RPD of sample and duplicate evaluated using +/-RL. Concentrations are <5X the RL. Qualifier Not Applicable for Radiochemistry.

d 5-day BOD--The 2:1 depletion requirement was not met for this sample e 5-day BOD--Test replicates show more than 30% difference between high and low values. The data is qualified per the method and can be used for reporting purposes h Preparation or preservation holding time was exceeded N/A indicates that spike recovery limits do not apply when sample concentration exceeds spike conc. by a factor of 4 or more or %RPD not applicable.

^ The Relative Percent Difference (RPD) obtained from the sample duplicate (DUP) is evaluated against the acceptance criteria when the sample is greater than five times (5X) the contract required detection limit (RL). In cases where either the sample or duplicate value is less than 5X the RL, a control limit of +/- the RL is used to evaluate the DUP result.

Indicates that a Quality Control parameter was not within specifications.

For PS, PSD, and SDILT results, the values listed are the measured amounts, not final concentrations.

Where the analytical method has been performed under NELAP certification, the analysis has met all of the requirements of the NELAC standard unless qualified on the QC Summary.

Page 14 of 26 SDG: 510581

GEL LABORATORIES LLC 2040 Savage Road Charleston, SC 29407 - (843) 556-8171 - www.gel.com QC Summary Report Date: May 28, 2020 Westinghouse Electric Company, LLC Page 1 of 3 PO Drawer R Columbia, South Carolina

Contact:

Ms. Cynthia Logsdon Workorder: 510581 Parmname NOM Sample Qual QC Units RPD% REC% Range Anlst Date Time Rad Alpha Spec Batch 1994680 QC1204555898 510581001 DUP Uranium-233/234 13.2 12.1 pCi/g 9.25 (0%-20%) HAKB 05/07/20 20:55 Uncertainty +/-0.986 +/-1.02 Uranium-235/236 0.828 0.575 pCi/g 36.1 * (0%-20%)

Uncertainty +/-0.286 +/-0.253 Uranium-238 3.22 2.27 pCi/g 34.6 * (0%-20%)

Uncertainty +/-0.486 +/-0.450 QC1204555899 LCS Uranium-233/234 12.2 pCi/g 05/07/20 20:55 Uncertainty +/-0.829 Uranium-235/236 0.933 pCi/g Uncertainty +/-0.257 Uranium-238 12.9 12.0 pCi/g 93.5 (75%-125%)

Uncertainty +/-0.821 QC1204555897 MB Uranium-233/234 0.428 pCi/g 05/09/20 13:07 Uncertainty +/-0.164 Uranium-235/236 0.0679 pCi/g Uncertainty +/-0.0763 Uranium-238 U 0.0889 pCi/g Uncertainty +/-0.0914 Batch 1995912 QC1204558442 510581002 DUP Uranium-233/234 8310 8000 pCi/g 3.74 (0%-20%) HAKB 05/11/20 11:59 Uncertainty +/-213 +/-253 Uranium-235/236 465 379 pCi/g 20.5 * (0%-20%)

Uncertainty +/-56.2 +/-61.4 Uranium-238 1620 1420 pCi/g 13.5 (0%-20%)

Uncertainty +/-94.3 +/-107 Page 15 of 26 SDG: 510581

GEL LABORATORIES LLC 2040 Savage Road Charleston, SC 29407 - (843) 556-8171 - www.gel.com QC Summary Workorder: 510581 Page 2 of 3 Parmname NOM Sample Qual QC Units RPD% REC% Range Anlst Date Time Rad Alpha Spec Batch 1995912 QC1204558443 LCS Uranium-233/234 162 pCi/g HAKB 05/11/20 11:59 Uncertainty +/-27.6 Uranium-235/236 17.4 pCi/g Uncertainty +/-10.6 Uranium-238 160 168 pCi/g 105 (75%-125%)

Uncertainty +/-28.1 QC1204558441 MB Uranium-233/234 U -1.59 pCi/g 05/11/20 11:59 Uncertainty +/-2.31 Uranium-235/236 U -0.163 pCi/g Uncertainty +/-2.70 Uranium-238 U 0.176 pCi/g Uncertainty +/-3.14 Rad Liquid Scintillation Batch 1994733 QC1204556036 510581001 DUP Technetium-99 U 0.447 U 0.433 pCi/g N/A N/A JJ3 05/10/20 07:52 Uncertainty +/-1.94 +/-2.00 QC1204556037 LCS Technetium-99 57.1 49.8 pCi/g 87.1 (75%-125%) 05/10/20 08:14 Uncertainty +/-3.28 QC1204556035 MB Technetium-99 U 2.16 pCi/g 05/10/20 07:30 Uncertainty +/-2.07 Notes:

Counting Uncertainty is calculated at the 95% confidence level (1.96-sigma).

The Qualifiers in this report are defined as follows:

- Analyte is a Tracer compound

< Result is less than value reported

> Result is greater than value reported BD Results are either below the MDC or tracer recovery is low FA Failed analysis.

H Analytical holding time was exceeded J See case narrative for an explanation Page 16 of 26 SDG: 510581

GEL LABORATORIES LLC 2040 Savage Road Charleston, SC 29407 - (843) 556-8171 - www.gel.com QC Summary Workorder: 510581 Page 3 of 3 Parmname NOM Sample Qual QC Units RPD% REC% Range Anlst Date Time J Value is estimated K Analyte present. Reported value may be biased high. Actual value is expected to be lower.

L Analyte present. Reported value may be biased low. Actual value is expected to be higher.

M M if above MDC and less than LLD M REMP Result > MDC/CL and < RDL N/A RPD or %Recovery limits do not apply.

N1 See case narrative ND Analyte concentration is not detected above the detection limit NJ Consult Case Narrative, Data Summary package, or Project Manager concerning this qualifier Q One or more quality control criteria have not been met. Refer to the applicable narrative or DER.

R Sample results are rejected U Analyte was analyzed for, but not detected above the MDL, MDA, MDC or LOD.

UI Gamma Spectroscopy--Uncertain identification UJ Gamma Spectroscopy--Uncertain identification UL Not considered detected. The associated number is the reported concentration, which may be inaccurate due to a low bias.

X Consult Case Narrative, Data Summary package, or Project Manager concerning this qualifier Y Other specific qualifiers were required to properly define the results. Consult case narrative.

^ RPD of sample and duplicate evaluated using +/-RL. Concentrations are <5X the RL. Qualifier Not Applicable for Radiochemistry.

h Preparation or preservation holding time was exceeded N/A indicates that spike recovery limits do not apply when sample concentration exceeds spike conc. by a factor of 4 or more or %RPD not applicable.

^ The Relative Percent Difference (RPD) obtained from the sample duplicate (DUP) is evaluated against the acceptance criteria when the sample is greater than five times (5X) the contract required detection limit (RL). In cases where either the sample or duplicate value is less than 5X the RL, a control limit of +/- the RL is used to evaluate the DUP result.

Indicates that a Quality Control parameter was not within specifications.

For PS, PSD, and SDILT results, the values listed are the measured amounts, not final concentrations.

Where the analytical method has been performed under NELAP certification, the analysis has met all of the requirements of the NELAC standard unless qualified on the QC Summary.

Page 17 of 26 SDG: 510581

Technical Case Narrative Westinghouse Electric Co, LLC SDG #: 510581 General Chemistry Product: Ion Chromatography Analytical Method: SW846 9056A Analytical Procedure: GL-GC-E-086 REV# 27 Analytical Batches: 1994861 and 1994849 The following samples were analyzed using the above methods and analytical procedure(s).

GEL Sample ID# Client Sample Identification 510581001 HF1-B1-(1-2) 510581002 HF1-B1-(2-4) 510581003 HF1-B1-(4-6) 510581004 HF1-B1-(6-8) 510581005 HF1-B1-(8-10) 1204556270 Method Blank (MB) 1204556271 Laboratory Control Sample (LCS) 1204556272 510581001(HF1-B1-(1-2)) Sample Duplicate (DUP) 1204556273 510581001(HF1-B1-(1-2)) Matrix Spike (MS)

The samples in this SDG were analyzed on a "dry weight" basis.

Data Summary:

All sample data provided in this report met the acceptance criteria specified in the analytical methods and procedures for initial calibration, continuing calibration, instrument controls and process controls where applicable, with the following exceptions.

Quality Control (QC) Information Matrix Spike (MS)/Post Spike (PS) Recovery Statement The percent recoveries (%R) obtained from the spike analyses are evaluated when the sample concentration is less than four times (4X) the spike concentration added. The matrix spike recovered outside of the established acceptance limits due to matrix interference and/or non-homogeneity.

Analyte Sample Value Fluoride 1204556273 (HF1-B1-(1-2)MS) 46.8* (75%-125%)

Technical Information Sample Dilutions The following samples 1204556272 (HF1-B1-(1-2)DUP), 1204556273 (HF1-B1-(1-2)MS), 510581001 (HF1-B1-(1-2)), 510581002 (HF1-B1-(2-4)), 510581003 (HF1-B1-(4-6)), 510581004 (HF1-B1-(6-8)) and 510581005 (HF1-B1-(8-10)) were diluted because target analyte concentrations exceeded the calibration range.

Dilutions may be required for many reasons, including to minimize matrix interferences or to bring over range target analyte concentrations into the linear calibration range.

Page 18 of 26 SDG: 510581

510581 Analyte 001 002 003 004 005 Fluoride 1X 20X 50X 25X 10X Nitrate 5X 20X 50X 25X 10X Product: pH Analytical Method: SW846 9045D Analytical Procedure: GL-GC-E-008 REV# 24 Analytical Batch: 1994735 The following samples were analyzed using the above methods and analytical procedure(s).

GEL Sample ID# Client Sample Identification 510581001 HF1-B1-(1-2) 510581002 HF1-B1-(2-4) 510581003 HF1-B1-(4-6) 510581004 HF1-B1-(6-8) 510581005 HF1-B1-(8-10) 1204556042 Laboratory Control Sample (LCS) 1204556044 510581001(HF1-B1-(1-2)) Sample Duplicate (DUP)

The samples in this SDG were analyzed on an "as received" basis.

Data Summary:

All sample data provided in this report met the acceptance criteria specified in the analytical methods and procedures for initial calibration, continuing calibration, instrument controls and process controls where applicable, with the following exceptions.

Technical Information Holding Times Samples (See Below) were received by the laboratory outside of the method specified holding time. The data is qualified.

Sample Analyte Value 1204556044 (HF1-B1-(1-2)DUP) Received 05-MAY-20, out of holding 04-MAY-20 510581001 (HF1-B1-(1-2)) Received 05-MAY-20, out of holding 04-MAY-20 510581002 (HF1-B1-(2-4)) Received 05-MAY-20, out of holding 04-MAY-20 510581003 (HF1-B1-(4-6)) Received 05-MAY-20, out of holding 04-MAY-20 510581004 (HF1-B1-(6-8)) Received 05-MAY-20, out of holding 04-MAY-20 510581005 (HF1-B1-(8-10)) Received 05-MAY-20, out of holding 04-MAY-20 Radiochemistry Page 19 of 26 SDG: 510581

Product: Alphaspec U, Soil/Veg Analytical Method: DOE EML HASL-300, U-02-RC Modified Analytical Procedure: GL-RAD-A-011 REV# 27 Analytical Batch: 1994680 Preparation Method: Dry Soil Prep Preparation Procedure: GL-RAD-A-021 REV# 23 Preparation Batch: 1994664 The following samples were analyzed using the above methods and analytical procedure(s).

GEL Sample ID# Client Sample Identification 510581001 HF1-B1-(1-2) 510581004 HF1-B1-(6-8) 510581005 HF1-B1-(8-10) 1204555897 Method Blank (MB) 1204555898 510581001(HF1-B1-(1-2)) Sample Duplicate (DUP) 1204555899 Laboratory Control Sample (LCS)

The samples in this SDG were analyzed on a "dry weight" basis.

Data Summary:

All sample data provided in this report met the acceptance criteria specified in the analytical methods and procedures for initial calibration, continuing calibration, instrument controls and process controls where applicable, with the following exceptions.

Quality Control (QC) Information Method Blank Criteria The blank result (See Below) is greater than the MDC but less than the required detection limit.

Sample Analyte Value 1204555897 (MB) Uranium-233/234 Result: 0.428 pCi/g > MDA: 0.138 pCi/g <= RDL: 0.500 pCi/g Uranium-235/236 Result: 0.0679 pCi/g > MDA: 0.0509 pCi/g <= RDL: 0.500 pCi/g Duplication Criteria between QC Sample and Duplicate Sample The Sample and the Duplicate, (See Below), did not meet the relative percent difference requirement; however, they do meet the relative error ratio requirement with the value listed below.

Sample Analyte Value 1204555898 (HF1-B1-(1-2)DUP) Uranium-235/236 RPD 36.1* (0.00%-20.00%) RER 1.24 (0-3)

Uranium-238 RPD 34.6* (0.00%-20.00%) RER 2.31 (0-3)

Technical Information Recounts Samples 1204555897 (MB) and 510581001 (HF1-B1-(1-2)) were recounted due to high MDCs. The recounts are reported.

Page 20 of 26 SDG: 510581

Product: Alphaspec U, Soil/Veg Analytical Method: DOE EML HASL-300, U-02-RC Modified Analytical Procedure: GL-RAD-A-011 REV# 27 Analytical Batch: 1995912 Preparation Method: Dry Soil Prep Preparation Procedure: GL-RAD-A-021 REV# 23 Preparation Batch: 1994664 The following samples were analyzed using the above methods and analytical procedure(s).

GEL Sample ID# Client Sample Identification 510581002 HF1-B1-(2-4) 510581003 HF1-B1-(4-6) 1204558441 Method Blank (MB) 1204558442 510581002(HF1-B1-(2-4)) Sample Duplicate (DUP) 1204558443 Laboratory Control Sample (LCS)

The samples in this SDG were analyzed on a "dry weight" basis.

Data Summary:

All sample data provided in this report met the acceptance criteria specified in the analytical methods and procedures for initial calibration, continuing calibration, instrument controls and process controls where applicable, with the following exceptions.

Quality Control (QC) Information Duplication Criteria between QC Sample and Duplicate Sample The Sample and the Duplicate, (See Below), did not meet the relative percent difference requirement; however, they do meet the relative error ratio requirement with the value listed below.

Sample Analyte Value 1204558442 (HF1-B1-(2-4)DUP) Uranium-235/236 RPD 20.5* (0.00%-20.00%) RER 1.05 (0-3)

RDL Met The blank (See Below) did not meet the detection limit due to keeping the blank volume consistent with the other sample aliquots.

Sample Analyte Value 1204558441 (MB) Uranium-233/234 Result -1.59 < MDA 7.84 > RDL 0.5 pCi/g Uranium-235/236 Result -0.163 < MDA 5.72 > RDL 0.5 pCi/g Uranium-238 Result 0.176 < MDA 6.81 > RDL 0.5 pCi/g Technical Information Page 21 of 26 SDG: 510581

Sample Re-prep/Re-analysis Samples were reprepped due to low carrier/tracer yield. The re-analysis is being reported.

Product: Dry Weight Preparation Method: ASTM D 2216 (Modified)

Preparation Procedure: GL-OA-E-020 REV# 13 Preparation Batch: 1994664 Preparation Method: Dry Soil Prep Preparation Procedure: GL-RAD-A-021 REV# 23 Preparation Batch: 1994664 The following samples were analyzed using the above methods and analytical procedure(s).

GEL Sample ID# Client Sample Identification 510581001 HF1-B1-(1-2) 510581002 HF1-B1-(2-4) 510581003 HF1-B1-(4-6) 510581004 HF1-B1-(6-8) 510581005 HF1-B1-(8-10) 1204555869 510581001(HF1-B1-(1-2)) Sample Duplicate (DUP)

The samples in this SDG were analyzed on an "as received" basis.

Data Summary:

There are no exceptions, anomalies or deviations from the specified methods. All sample data provided in this report met the acceptance criteria specified in the analytical methods and procedures for initial calibration, continuing calibration, instrument controls and process controls where applicable.

Product: Liquid Scint Tc99, Soil Analytical Method: DOE EML HASL-300, Tc-02-RC Modified Analytical Procedure: GL-RAD-A-059 REV# 5 Analytical Batch: 1994733 The following samples were analyzed using the above methods and analytical procedure(s).

GEL Sample ID# Client Sample Identification 510581001 HF1-B1-(1-2) 510581002 HF1-B1-(2-4) 510581003 HF1-B1-(4-6) 510581004 HF1-B1-(6-8) 510581005 HF1-B1-(8-10) 1204556035 Method Blank (MB)

Page 22 of 26 SDG: 510581

1204556036 510581001(HF1-B1-(1-2)) Sample Duplicate (DUP) 1204556037 Laboratory Control Sample (LCS)

The samples in this SDG were analyzed on an "as received" basis.

Data Summary:

There are no exceptions, anomalies or deviations from the specified methods. All sample data provided in this report met the acceptance criteria specified in the analytical methods and procedures for initial calibration, continuing calibration, instrument controls and process controls where applicable.

Certification Statement Where the analytical method has been performed under NELAP certification, the analysis has met all of the requirements of the NELAC standard unless otherwise noted in the analytical case narrative.

Page 23 of 26 SDG: 510581

Page 24 of 26 SDG: 510581 Page 25 of 26 SDG: 510581 List of current GEL Certifications as of 28 May 2020 State Certification Alaska 17018 Alaska Drinking Water SC00012 Arkansas 880651 CLIA 42D0904046 California 2940 Colorado SC00012 Connecticut PH0169 DoD ELAP/ ISO17025 A2LA 2567.01 Florida NELAP E87156 Foreign Soils Permit P3301500283, P3301500253 Georgia SC00012 Georgia SDWA 967 Hawaii SC00012 Idaho SC00012 Illinois NELAP 200029 Indiana CSC01 Kansas NELAP E10332 Kentucky SDWA 90129 Kentucky Wastewater 90129 Louisiana Drinking Water LA024 Louisiana NELAP 03046 (AI33904)

Maine 2019020 Maryland 270 Massachusetts MSC012 Massachusetts PFAS Approv Letter Michigan 9976 Mississippi SC00012 Nebraska NEOS2613 Nevada SC0001220201 New Hampshire NELAP 2054 New Jersey NELAP SC002 New Mexico SC00012 New York NELAP 11501 North Carolina 233 North Carolina SDWA 45709 North Dakota R158 Oklahoma 2019165 Pennsylvania NELAP 6800485 Puerto Rico SC00012 S. Carolina Radiochem 10120002 Sanitation Districts of L 9255651 South Carolina Chemistry 10120001 Tennessee TN 02934 Texas NELAP T1047042352017 Utah NELAP SC00012202032 Vermont VT87156 Virginia NELAP 460202 Washington C780 Page 26 of 26 SDG: 510581

June 01, 2020 Ms. Cynthia Logsdon Westinghouse Electric Company, LLC PO Drawer R Columbia, South Carolina 29205 Re: Soil and Vegetation Analysis Work Order: 510757

Dear Ms. Logsdon:

GEL Laboratories, LLC (GEL) appreciates the opportunity to provide the enclosed analytical results for the sample(s) we received on May 06, 2020. This original data report has been prepared and reviewed in accordance with GELs standard operating procedures.

Test results for NELAP or ISO 17025 accredited tests are verified to meet the requirements of those standards, with any exceptions noted. The results reported relate only to the items tested and to the sample as received by the laboratory. These results may not be reproduced except as full reports without approval by the laboratory.

Copies of GELs accreditations and certifications can be found on our website at www.gel.com.

Our policy is to provide high quality, personalized analytical services to enable you to meet your analytical needs on time every time. We trust that you will find everything in order and to your satisfaction. If you have any questions, please do not hesitate to call me at (843) 556-8171, ext. 4707.

Sincerely, PM_SIGN_HERE Katelyn Gray Project Manager Purchase Order: 4500799254 Enclosures Page 1 of 39 SDG: 510757

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 (843) 5568171 www.gel.com Certificate of Analysis Report for WNUC008 Westinghouse Electric Co, LLC (4500775170)

Client SDG: 510757 GEL Work Order: 510757 The Qualifiers in this report are defined as follows:

A quality control analyte recovery is outside of specified acceptance criteria

- Analyte is a Tracer compound

- Analyte is a surrogate compound H Analytical holding time was exceeded J See case narrative for an explanation J Value is estimated U Analyte was analyzed for, but not detected above the MDL, MDA, MDC or LOD.

Where the analytical method has been performed under NELAP certification, the analysis has met all of the requirements of the NELAC standard unless qualified on the Certificate of Analysis.

The designation ND, if present, appears in the result column when the analyte concentration is not detected above the limit as defined in the U qualifier above.

This data report has been prepared and reviewed in accordance with GEL Laboratories LLC standard operating procedures. Please direct any questions to your Project Manager, Katelyn Gray.

Reviewed by USER_SIGN_HERE Page 2 of 39 SDG: 510757

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Certificate of Analysis Report Date: June 1, 2020 Company : Westinghouse Electric Company, LLC Address : PO Drawer R Columbia, South Carolina 29205

Contact:

Ms. Cynthia Logsdon Project: Soil and Vegetation Analysis Client Sample ID: HF1-B2-(1-2) Project: WNUC00821 Sample ID: 510757001 Client ID: WNUC008 Matrix: Soil Collect Date: 05-MAY-20 09:12 Receive Date: 06-MAY-20 Collector: Client Moisture: 8.89%

Parameter Qualifier Result DL RL Units PF DF Analyst Date Time Batch Method Ion Chromatography SW846 9056A Fluoride and Nitrate "Dry Weight Corrected" Fluoride 1.28 0.376 1.11 mg/kg 10.1 1 LXA2 05/07/20 0024 1995237 1 Nitrate-N 76.5 0.730 2.21 mg/kg 10.1 2 LXA2 05/07/20 1557 1995237 2 Titration and Ion Analysis SW9045D Corrosivity (pH<2or>14) "As Received" Corrosivity H 6.38 0.0100 0.100 SU 1 RXB5 05/07/20 1453 1994735 3 The following Prep Methods were performed:

Method Description Analyst Date Time Prep Batch SW846 9056A SW846 9056A Total Anions in Soil CJ2 05/06/20 1859 1995236 The following Analytical Methods were performed:

Method Description Analyst Comments 1 SW846 9056A 2 SW846 9056A 3 SW846 9045D Notes:

Column headers are defined as follows:

DF: Dilution Factor Lc/LC: Critical Level DL: Detection Limit PF: Prep Factor MDA: Minimum Detectable Activity RL: Reporting Limit MDC: Minimum Detectable Concentration SQL: Sample Quantitation Limit Page 3 of 39 SDG: 510757

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Certificate of Analysis Report Date: June 1, 2020 Company : Westinghouse Electric Company, LLC Address : PO Drawer R Columbia, South Carolina 29205

Contact:

Ms. Cynthia Logsdon Project: Soil and Vegetation Analysis Client Sample ID: HF1-B2-(2-4) Project: WNUC00821 Sample ID: 510757002 Client ID: WNUC008 Matrix: Soil Collect Date: 05-MAY-20 09:40 Receive Date: 06-MAY-20 Collector: Client Moisture: 7.14%

Parameter Qualifier Result DL RL Units PF DF Analyst Date Time Batch Method Ion Chromatography SW846 9056A Fluoride and Nitrate "Dry Weight Corrected" Fluoride J 0.623 0.365 1.07 mg/kg 9.98 1 LXA2 05/07/20 0157 1995237 1 Nitrate-N 90.8 1.77 5.37 mg/kg 9.98 5 LXA2 05/07/20 1730 1995237 2 Titration and Ion Analysis SW9045D Corrosivity (pH<2or>14) "As Received" Corrosivity H 5.16 0.0100 0.100 SU 1 RXB5 05/07/20 1456 1994735 3 The following Prep Methods were performed:

Method Description Analyst Date Time Prep Batch SW846 9056A SW846 9056A Total Anions in Soil CJ2 05/06/20 1859 1995236 The following Analytical Methods were performed:

Method Description Analyst Comments 1 SW846 9056A 2 SW846 9056A 3 SW846 9045D Notes:

Column headers are defined as follows:

DF: Dilution Factor Lc/LC: Critical Level DL: Detection Limit PF: Prep Factor MDA: Minimum Detectable Activity RL: Reporting Limit MDC: Minimum Detectable Concentration SQL: Sample Quantitation Limit Page 4 of 39 SDG: 510757

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Certificate of Analysis Report Date: June 1, 2020 Company : Westinghouse Electric Company, LLC Address : PO Drawer R Columbia, South Carolina 29205

Contact:

Ms. Cynthia Logsdon Project: Soil and Vegetation Analysis Client Sample ID: HF1-B2-(4-6) Project: WNUC00821 Sample ID: 510757003 Client ID: WNUC008 Matrix: Soil Collect Date: 05-MAY-20 10:43 Receive Date: 06-MAY-20 Collector: Client Moisture: 8.79%

Parameter Qualifier Result DL RL Units PF DF Analyst Date Time Batch Method Ion Chromatography SW846 9056A Fluoride and Nitrate "Dry Weight Corrected" Fluoride U ND 0.372 1.09 mg/kg 9.98 1 LXA2 05/07/20 0227 1995237 1 Nitrate-N 94.0 1.80 5.47 mg/kg 9.98 5 LXA2 05/07/20 1800 1995237 2 Titration and Ion Analysis SW9045D Corrosivity (pH<2or>14) "As Received" Corrosivity H 6.05 0.0100 0.100 SU 1 RXB5 05/07/20 1457 1994735 3 The following Prep Methods were performed:

Method Description Analyst Date Time Prep Batch SW846 9056A SW846 9056A Total Anions in Soil CJ2 05/06/20 1859 1995236 The following Analytical Methods were performed:

Method Description Analyst Comments 1 SW846 9056A 2 SW846 9056A 3 SW846 9045D Notes:

Column headers are defined as follows:

DF: Dilution Factor Lc/LC: Critical Level DL: Detection Limit PF: Prep Factor MDA: Minimum Detectable Activity RL: Reporting Limit MDC: Minimum Detectable Concentration SQL: Sample Quantitation Limit Page 5 of 39 SDG: 510757

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Certificate of Analysis Report Date: June 1, 2020 Company : Westinghouse Electric Company, LLC Address : PO Drawer R Columbia, South Carolina 29205

Contact:

Ms. Cynthia Logsdon Project: Soil and Vegetation Analysis Client Sample ID: HF1-B2-(6-8) Project: WNUC00821 Sample ID: 510757004 Client ID: WNUC008 Matrix: Soil Collect Date: 05-MAY-20 11:30 Receive Date: 06-MAY-20 Collector: Client Moisture: 9.81%

Parameter Qualifier Result DL RL Units PF DF Analyst Date Time Batch Method Ion Chromatography SW846 9056A Fluoride and Nitrate "Dry Weight Corrected" Fluoride U ND 0.375 1.10 mg/kg 9.95 1 LXA2 05/07/20 0400 1995237 1 Nitrate-N 45.9 0.364 1.10 mg/kg 9.95 1 Titration and Ion Analysis SW9045D Corrosivity (pH<2or>14) "As Received" Corrosivity H 5.98 0.0100 0.100 SU 1 RXB5 05/07/20 1459 1994735 2 The following Prep Methods were performed:

Method Description Analyst Date Time Prep Batch SW846 9056A SW846 9056A Total Anions in Soil CJ2 05/06/20 1859 1995236 The following Analytical Methods were performed:

Method Description Analyst Comments 1 SW846 9056A 2 SW846 9045D Notes:

Column headers are defined as follows:

DF: Dilution Factor Lc/LC: Critical Level DL: Detection Limit PF: Prep Factor MDA: Minimum Detectable Activity RL: Reporting Limit MDC: Minimum Detectable Concentration SQL: Sample Quantitation Limit Page 6 of 39 SDG: 510757

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Certificate of Analysis Report Date: June 1, 2020 Company : Westinghouse Electric Company, LLC Address : PO Drawer R Columbia, South Carolina 29205

Contact:

Ms. Cynthia Logsdon Project: Soil and Vegetation Analysis Client Sample ID: HF1-B2-(8-10) Project: WNUC00821 Sample ID: 510757005 Client ID: WNUC008 Matrix: Soil Collect Date: 05-MAY-20 12:30 Receive Date: 06-MAY-20 Collector: Client Moisture: 13.1%

Parameter Qualifier Result DL RL Units PF DF Analyst Date Time Batch Method Ion Chromatography SW846 9056A Fluoride and Nitrate "Dry Weight Corrected" Fluoride J 0.800 0.388 1.14 mg/kg 9.93 1 LXA2 05/07/20 0431 1995237 1 Nitrate-N 23.4 0.377 1.14 mg/kg 9.93 1 Titration and Ion Analysis SW9045D Corrosivity (pH<2or>14) "As Received" Corrosivity H 6.17 0.0100 0.100 SU 1 RXB5 05/07/20 1500 1994735 2 The following Prep Methods were performed:

Method Description Analyst Date Time Prep Batch SW846 9056A SW846 9056A Total Anions in Soil CJ2 05/06/20 1859 1995236 The following Analytical Methods were performed:

Method Description Analyst Comments 1 SW846 9056A 2 SW846 9045D Notes:

Column headers are defined as follows:

DF: Dilution Factor Lc/LC: Critical Level DL: Detection Limit PF: Prep Factor MDA: Minimum Detectable Activity RL: Reporting Limit MDC: Minimum Detectable Concentration SQL: Sample Quantitation Limit Page 7 of 39 SDG: 510757

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Certificate of Analysis Report Date: June 1, 2020 Company : Westinghouse Electric Company, LLC Address : PO Drawer R Columbia, South Carolina 29205

Contact:

Ms. Cynthia Logsdon Project: Soil and Vegetation Analysis Client Sample ID: HF1-B3-(1-2) Project: WNUC00821 Sample ID: 510757006 Client ID: WNUC008 Matrix: Soil Collect Date: 05-MAY-20 14:13 Receive Date: 06-MAY-20 Collector: Client Moisture: 7.09%

Parameter Qualifier Result DL RL Units PF DF Analyst Date Time Batch Method Ion Chromatography SW846 9056A Fluoride and Nitrate "Dry Weight Corrected" Fluoride 6.24 0.370 1.09 mg/kg 10.1 1 LXA2 05/14/20 2320 1996294 1 Nitrate-N 285 3.59 10.9 mg/kg 10.1 10 LXA2 05/14/20 2347 1996294 2 Titration and Ion Analysis SW9045D Corrosivity (pH<2or>14) "As Received" Corrosivity H 4.82 0.0100 0.100 SU 1 RXB5 05/07/20 1502 1994735 3 The following Prep Methods were performed:

Method Description Analyst Date Time Prep Batch SW846 9056A SW846 9056A Total Anions in Soil CJ2 05/14/20 2018 1996293 The following Analytical Methods were performed:

Method Description Analyst Comments 1 SW846 9056A 2 SW846 9056A 3 SW846 9045D Notes:

Column headers are defined as follows:

DF: Dilution Factor Lc/LC: Critical Level DL: Detection Limit PF: Prep Factor MDA: Minimum Detectable Activity RL: Reporting Limit MDC: Minimum Detectable Concentration SQL: Sample Quantitation Limit Page 8 of 39 SDG: 510757

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Certificate of Analysis Report Date: June 1, 2020 Company : Westinghouse Electric Company, LLC Address : PO Drawer R Columbia, South Carolina 29205

Contact:

Ms. Cynthia Logsdon Project: Soil and Vegetation Analysis Client Sample ID: HF1-B3-(2-4) Project: WNUC00821 Sample ID: 510757007 Client ID: WNUC008 Matrix: Soil Collect Date: 05-MAY-20 14:44 Receive Date: 06-MAY-20 Collector: Client Moisture: 8.9%

Parameter Qualifier Result DL RL Units PF DF Analyst Date Time Batch Method Ion Chromatography SW846 9056A Fluoride and Nitrate "Dry Weight Corrected" Fluoride 683 18.7 55.0 mg/kg 10.0 50 LXA2 05/15/20 0229 1996294 1 Nitrate-N 589 18.2 55.0 mg/kg 10.0 50 Titration and Ion Analysis SW9045D Corrosivity (pH<2or>14) "As Received" Corrosivity H 4.08 0.0100 0.100 SU 1 RXB5 05/07/20 1501 1994735 2 The following Prep Methods were performed:

Method Description Analyst Date Time Prep Batch SW846 9056A SW846 9056A Total Anions in Soil CJ2 05/14/20 2018 1996293 The following Analytical Methods were performed:

Method Description Analyst Comments 1 SW846 9056A 2 SW846 9045D Notes:

Column headers are defined as follows:

DF: Dilution Factor Lc/LC: Critical Level DL: Detection Limit PF: Prep Factor MDA: Minimum Detectable Activity RL: Reporting Limit MDC: Minimum Detectable Concentration SQL: Sample Quantitation Limit Page 9 of 39 SDG: 510757

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Certificate of Analysis Report Date: June 1, 2020 Company : Westinghouse Electric Company, LLC Address : PO Drawer R Columbia, South Carolina 29205

Contact:

Ms. Cynthia Logsdon Project: Soil and Vegetation Analysis Client Sample ID: HF1-B3-(4-6) Project: WNUC00821 Sample ID: 510757008 Client ID: WNUC008 Matrix: Soil Collect Date: 05-MAY-20 15:35 Receive Date: 06-MAY-20 Collector: Client Moisture: 13.9%

Parameter Qualifier Result DL RL Units PF DF Analyst Date Time Batch Method Ion Chromatography SW846 9056A Fluoride and Nitrate "Dry Weight Corrected" Fluoride 1020 19.9 58.7 mg/kg 10.1 50 LXA2 05/15/20 0417 1996294 1 Nitrate-N 1290 19.4 58.7 mg/kg 10.1 50 Titration and Ion Analysis SW9045D Corrosivity (pH<2or>14) "As Received" Corrosivity H 3.96 0.0100 0.100 SU 1 RXB5 05/07/20 1502 1994735 2 The following Prep Methods were performed:

Method Description Analyst Date Time Prep Batch SW846 9056A SW846 9056A Total Anions in Soil CJ2 05/14/20 2018 1996293 The following Analytical Methods were performed:

Method Description Analyst Comments 1 SW846 9056A 2 SW846 9045D Notes:

Column headers are defined as follows:

DF: Dilution Factor Lc/LC: Critical Level DL: Detection Limit PF: Prep Factor MDA: Minimum Detectable Activity RL: Reporting Limit MDC: Minimum Detectable Concentration SQL: Sample Quantitation Limit Page 10 of 39 SDG: 510757

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Certificate of Analysis Report Date: June 1, 2020 Company : Westinghouse Electric Company, LLC Address : PO Drawer R Columbia, South Carolina 29205

Contact:

Ms. Cynthia Logsdon Project: Soil and Vegetation Analysis Client Sample ID: HF1-B3-(6-8) Project: WNUC00821 Sample ID: 510757009 Client ID: WNUC008 Matrix: Soil Collect Date: 05-MAY-20 16:20 Receive Date: 06-MAY-20 Collector: Client Moisture: 12.3%

Parameter Qualifier Result DL RL Units PF DF Analyst Date Time Batch Method Ion Chromatography SW846 9056A Fluoride and Nitrate "Dry Weight Corrected" Fluoride 546 9.79 28.8 mg/kg 10.1 25 LXA2 05/15/20 0511 1996294 1 Nitrate-N 700 9.50 28.8 mg/kg 10.1 25 Titration and Ion Analysis SW9045D Corrosivity (pH<2or>14) "As Received" Corrosivity H 4.11 0.0100 0.100 SU 1 RXB5 05/07/20 1504 1994735 2 The following Prep Methods were performed:

Method Description Analyst Date Time Prep Batch SW846 9056A SW846 9056A Total Anions in Soil CJ2 05/14/20 2018 1996293 The following Analytical Methods were performed:

Method Description Analyst Comments 1 SW846 9056A 2 SW846 9045D Notes:

Column headers are defined as follows:

DF: Dilution Factor Lc/LC: Critical Level DL: Detection Limit PF: Prep Factor MDA: Minimum Detectable Activity RL: Reporting Limit MDC: Minimum Detectable Concentration SQL: Sample Quantitation Limit Page 11 of 39 SDG: 510757

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Certificate of Analysis Report Date: June 1, 2020 Company : Westinghouse Electric Company, LLC Address : PO Drawer R Columbia, South Carolina 29205

Contact:

Ms. Cynthia Logsdon Project: Soil and Vegetation Analysis Client Sample ID: HF1-B3-(8-10) Project: WNUC00821 Sample ID: 510757010 Client ID: WNUC008 Matrix: Soil Collect Date: 05-MAY-20 17:22 Receive Date: 06-MAY-20 Collector: Client Moisture: 12.6%

Parameter Qualifier Result DL RL Units PF DF Analyst Date Time Batch Method Ion Chromatography SW846 9056A Fluoride and Nitrate "Dry Weight Corrected" Fluoride 343 3.91 11.5 mg/kg 10.1 10 LXA2 05/15/20 0605 1996294 1 Nitrate-N 398 3.80 11.5 mg/kg 10.1 10 Titration and Ion Analysis SW9045D Corrosivity (pH<2or>14) "As Received" Corrosivity H 4.25 0.0100 0.100 SU 1 RXB5 05/07/20 1505 1994735 2 The following Prep Methods were performed:

Method Description Analyst Date Time Prep Batch SW846 9056A SW846 9056A Total Anions in Soil CJ2 05/14/20 2018 1996293 The following Analytical Methods were performed:

Method Description Analyst Comments 1 SW846 9056A 2 SW846 9045D Notes:

Column headers are defined as follows:

DF: Dilution Factor Lc/LC: Critical Level DL: Detection Limit PF: Prep Factor MDA: Minimum Detectable Activity RL: Reporting Limit MDC: Minimum Detectable Concentration SQL: Sample Quantitation Limit Page 12 of 39 SDG: 510757

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Certificate of Analysis Report Date: June 1, 2020 Company : Westinghouse Electric Company, LLC Address : PO Drawer R Columbia, South Carolina 29205

Contact:

Ms. Cynthia Logsdon Project: Soil and Vegetation Analysis Client Sample ID: HF1-B2-(1-2) Project: WNUC00821 Sample ID: 510757001 Client ID: WNUC008 Matrix: Soil Collect Date: 05-MAY-20 09:12 Receive Date: 06-MAY-20 Collector: Client Moisture: 8.89%

Parameter Qualifier Result Uncertainty MDC RL Units PF DF Analyst Date Time Batch Method Rad Alpha Spec Analysis Alphaspec U, Soil/Veg "Dry Weight Corrected" Uranium-233/234 4.65 +/-0.740 0.316 0.500 pCi/g BXA4 05/09/20 0839 1995261 1 Uranium-235/236 0.455 +/-0.268 0.201 0.500 pCi/g Uranium-238 1.39 +/-0.409 0.228 0.500 pCi/g Rad Liquid Scintillation Analysis Liquid Scint Tc99, Soil "As Received" Technetium-99 U -1.41 +/-1.95 3.51 5.00 pCi/g JJ3 05/12/20 0610 1995247 2 The following Prep Methods were performed:

Method Description Analyst Date Time Prep Batch Dry Soil Prep Dry Soil Prep GL-RAD-A-021 CXB7 05/06/20 1726 1995223 The following Analytical Methods were performed:

Method Description Analyst Comments 1 DOE EML HASL-300, U-02-RC Modified 2 DOE EML HASL-300, Tc-02-RC Modified Surrogate/Tracer Recovery Test Result Nominal Recovery% Acceptable Limits Uranium-232 Tracer Alphaspec U, Soil/Veg "Dry Weight Corrected" 99.6 (15%-125%)

Technetium-99m Tracer Liquid Scint Tc99, Soil "As Received" 99.5 (15%-125%)

Notes:

Counting Uncertainty is calculated at the 95% confidence level (1.96-sigma).

Column headers are defined as follows:

DF: Dilution Factor Lc/LC: Critical Level DL: Detection Limit PF: Prep Factor MDA: Minimum Detectable Activity RL: Reporting Limit MDC: Minimum Detectable Concentration SQL: Sample Quantitation Limit Page 13 of 39 SDG: 510757

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Certificate of Analysis Report Date: June 1, 2020 Company : Westinghouse Electric Company, LLC Address : PO Drawer R Columbia, South Carolina 29205

Contact:

Ms. Cynthia Logsdon Project: Soil and Vegetation Analysis Client Sample ID: HF1-B2-(2-4) Project: WNUC00821 Sample ID: 510757002 Client ID: WNUC008 Matrix: Soil Collect Date: 05-MAY-20 09:40 Receive Date: 06-MAY-20 Collector: Client Moisture: 7.14%

Parameter Qualifier Result Uncertainty MDC RL Units PF DF Analyst Date Time Batch Method Rad Alpha Spec Analysis Alphaspec U, Soil/Veg "Dry Weight Corrected" Uranium-233/234 0.847 +/-0.345 0.285 0.500 pCi/g BXA4 05/09/20 0839 1995261 1 Uranium-235/236 U 0.107 +/-0.154 0.186 0.500 pCi/g Uranium-238 0.785 +/-0.321 0.206 0.500 pCi/g Rad Liquid Scintillation Analysis Liquid Scint Tc99, Soil "As Received" Technetium-99 U -0.842 +/-2.14 3.79 5.00 pCi/g JJ3 05/12/20 0626 1995247 2 The following Prep Methods were performed:

Method Description Analyst Date Time Prep Batch Dry Soil Prep Dry Soil Prep GL-RAD-A-021 CXB7 05/06/20 1726 1995223 The following Analytical Methods were performed:

Method Description Analyst Comments 1 DOE EML HASL-300, U-02-RC Modified 2 DOE EML HASL-300, Tc-02-RC Modified Surrogate/Tracer Recovery Test Result Nominal Recovery% Acceptable Limits Uranium-232 Tracer Alphaspec U, Soil/Veg "Dry Weight Corrected" 87 (15%-125%)

Technetium-99m Tracer Liquid Scint Tc99, Soil "As Received" 97.6 (15%-125%)

Notes:

Counting Uncertainty is calculated at the 95% confidence level (1.96-sigma).

Column headers are defined as follows:

DF: Dilution Factor Lc/LC: Critical Level DL: Detection Limit PF: Prep Factor MDA: Minimum Detectable Activity RL: Reporting Limit MDC: Minimum Detectable Concentration SQL: Sample Quantitation Limit Page 14 of 39 SDG: 510757

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Certificate of Analysis Report Date: June 1, 2020 Company : Westinghouse Electric Company, LLC Address : PO Drawer R Columbia, South Carolina 29205

Contact:

Ms. Cynthia Logsdon Project: Soil and Vegetation Analysis Client Sample ID: HF1-B2-(4-6) Project: WNUC00821 Sample ID: 510757003 Client ID: WNUC008 Matrix: Soil Collect Date: 05-MAY-20 10:43 Receive Date: 06-MAY-20 Collector: Client Moisture: 8.79%

Parameter Qualifier Result Uncertainty MDC RL Units PF DF Analyst Date Time Batch Method Rad Alpha Spec Analysis Alphaspec U, Soil/Veg "Dry Weight Corrected" Uranium-233/234 1.50 +/-0.493 0.341 0.500 pCi/g BXA4 05/09/20 0839 1995261 1 Uranium-235/236 U 0.0943 +/-0.162 0.141 0.500 pCi/g Uranium-238 0.955 +/-0.391 0.251 0.500 pCi/g Rad Liquid Scintillation Analysis Liquid Scint Tc99, Soil "As Received" Technetium-99 U -2.60 +/-1.99 3.66 5.00 pCi/g JJ3 05/12/20 0643 1995247 2 The following Prep Methods were performed:

Method Description Analyst Date Time Prep Batch Dry Soil Prep Dry Soil Prep GL-RAD-A-021 CXB7 05/06/20 1726 1995223 The following Analytical Methods were performed:

Method Description Analyst Comments 1 DOE EML HASL-300, U-02-RC Modified 2 DOE EML HASL-300, Tc-02-RC Modified Surrogate/Tracer Recovery Test Result Nominal Recovery% Acceptable Limits Uranium-232 Tracer Alphaspec U, Soil/Veg "Dry Weight Corrected" 90.6 (15%-125%)

Technetium-99m Tracer Liquid Scint Tc99, Soil "As Received" 97.2 (15%-125%)

Notes:

Counting Uncertainty is calculated at the 95% confidence level (1.96-sigma).

Column headers are defined as follows:

DF: Dilution Factor Lc/LC: Critical Level DL: Detection Limit PF: Prep Factor MDA: Minimum Detectable Activity RL: Reporting Limit MDC: Minimum Detectable Concentration SQL: Sample Quantitation Limit Page 15 of 39 SDG: 510757

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Certificate of Analysis Report Date: June 1, 2020 Company : Westinghouse Electric Company, LLC Address : PO Drawer R Columbia, South Carolina 29205

Contact:

Ms. Cynthia Logsdon Project: Soil and Vegetation Analysis Client Sample ID: HF1-B2-(6-8) Project: WNUC00821 Sample ID: 510757004 Client ID: WNUC008 Matrix: Soil Collect Date: 05-MAY-20 11:30 Receive Date: 06-MAY-20 Collector: Client Moisture: 9.81%

Parameter Qualifier Result Uncertainty MDC RL Units PF DF Analyst Date Time Batch Method Rad Alpha Spec Analysis Alphaspec U, Soil/Veg "Dry Weight Corrected" Uranium-233/234 0.926 +/-0.396 0.327 0.500 pCi/g BXA4 05/09/20 0839 1995261 1 Uranium-235/236 U 0.0131 +/-0.137 0.286 0.500 pCi/g Uranium-238 0.218 +/-0.198 0.182 0.500 pCi/g Rad Liquid Scintillation Analysis Liquid Scint Tc99, Soil "As Received" Technetium-99 U 0.00658 +/-2.05 3.57 5.00 pCi/g JJ3 05/12/20 0659 1995247 2 The following Prep Methods were performed:

Method Description Analyst Date Time Prep Batch Dry Soil Prep Dry Soil Prep GL-RAD-A-021 CXB7 05/06/20 1726 1995223 The following Analytical Methods were performed:

Method Description Analyst Comments 1 DOE EML HASL-300, U-02-RC Modified 2 DOE EML HASL-300, Tc-02-RC Modified Surrogate/Tracer Recovery Test Result Nominal Recovery% Acceptable Limits Uranium-232 Tracer Alphaspec U, Soil/Veg "Dry Weight Corrected" 86 (15%-125%)

Technetium-99m Tracer Liquid Scint Tc99, Soil "As Received" 97.2 (15%-125%)

Notes:

Counting Uncertainty is calculated at the 95% confidence level (1.96-sigma).

Column headers are defined as follows:

DF: Dilution Factor Lc/LC: Critical Level DL: Detection Limit PF: Prep Factor MDA: Minimum Detectable Activity RL: Reporting Limit MDC: Minimum Detectable Concentration SQL: Sample Quantitation Limit Page 16 of 39 SDG: 510757

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Certificate of Analysis Report Date: June 1, 2020 Company : Westinghouse Electric Company, LLC Address : PO Drawer R Columbia, South Carolina 29205

Contact:

Ms. Cynthia Logsdon Project: Soil and Vegetation Analysis Client Sample ID: HF1-B2-(8-10) Project: WNUC00821 Sample ID: 510757005 Client ID: WNUC008 Matrix: Soil Collect Date: 05-MAY-20 12:30 Receive Date: 06-MAY-20 Collector: Client Moisture: 13.1%

Parameter Qualifier Result Uncertainty MDC RL Units PF DF Analyst Date Time Batch Method Rad Alpha Spec Analysis Alphaspec U, Soil/Veg "Dry Weight Corrected" Uranium-233/234 1.52 +/-0.453 0.248 0.500 pCi/g BXA4 05/09/20 0839 1995261 1 Uranium-235/236 U 0.0407 +/-0.114 0.122 0.500 pCi/g Uranium-238 0.421 +/-0.253 0.231 0.500 pCi/g Rad Liquid Scintillation Analysis Liquid Scint Tc99, Soil "As Received" Technetium-99 U -2.27 +/-2.18 3.97 5.00 pCi/g JJ3 05/12/20 0716 1995247 2 The following Prep Methods were performed:

Method Description Analyst Date Time Prep Batch Dry Soil Prep Dry Soil Prep GL-RAD-A-021 CXB7 05/06/20 1726 1995223 The following Analytical Methods were performed:

Method Description Analyst Comments 1 DOE EML HASL-300, U-02-RC Modified 2 DOE EML HASL-300, Tc-02-RC Modified Surrogate/Tracer Recovery Test Result Nominal Recovery% Acceptable Limits Uranium-232 Tracer Alphaspec U, Soil/Veg "Dry Weight Corrected" 87.2 (15%-125%)

Technetium-99m Tracer Liquid Scint Tc99, Soil "As Received" 94.7 (15%-125%)

Notes:

Counting Uncertainty is calculated at the 95% confidence level (1.96-sigma).

Column headers are defined as follows:

DF: Dilution Factor Lc/LC: Critical Level DL: Detection Limit PF: Prep Factor MDA: Minimum Detectable Activity RL: Reporting Limit MDC: Minimum Detectable Concentration SQL: Sample Quantitation Limit Page 17 of 39 SDG: 510757

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Certificate of Analysis Report Date: June 1, 2020 Company : Westinghouse Electric Company, LLC Address : PO Drawer R Columbia, South Carolina 29205

Contact:

Ms. Cynthia Logsdon Project: Soil and Vegetation Analysis Client Sample ID: HF1-B3-(1-2) Project: WNUC00821 Sample ID: 510757006 Client ID: WNUC008 Matrix: Soil Collect Date: 05-MAY-20 14:13 Receive Date: 06-MAY-20 Collector: Client Moisture: 7.09%

Parameter Qualifier Result Uncertainty MDC RL Units PF DF Analyst Date Time Batch Method Rad Alpha Spec Analysis Alphaspec U, Soil/Veg "Dry Weight Corrected" Uranium-233/234 3.52 +/-0.714 0.281 0.500 pCi/g BXA4 05/09/20 0839 1995261 1 Uranium-235/236 U 0.0795 +/-0.156 0.217 0.500 pCi/g Uranium-238 1.13 +/-0.414 0.256 0.500 pCi/g Rad Liquid Scintillation Analysis Liquid Scint Tc99, Soil "As Received" Technetium-99 U -0.758 +/-2.03 3.59 5.00 pCi/g JJ3 05/12/20 0732 1995247 2 The following Prep Methods were performed:

Method Description Analyst Date Time Prep Batch Dry Soil Prep Dry Soil Prep GL-RAD-A-021 CXB7 05/06/20 1726 1995223 The following Analytical Methods were performed:

Method Description Analyst Comments 1 DOE EML HASL-300, U-02-RC Modified 2 DOE EML HASL-300, Tc-02-RC Modified Surrogate/Tracer Recovery Test Result Nominal Recovery% Acceptable Limits Uranium-232 Tracer Alphaspec U, Soil/Veg "Dry Weight Corrected" 74.2 (15%-125%)

Technetium-99m Tracer Liquid Scint Tc99, Soil "As Received" 101 (15%-125%)

Notes:

Counting Uncertainty is calculated at the 95% confidence level (1.96-sigma).

Column headers are defined as follows:

DF: Dilution Factor Lc/LC: Critical Level DL: Detection Limit PF: Prep Factor MDA: Minimum Detectable Activity RL: Reporting Limit MDC: Minimum Detectable Concentration SQL: Sample Quantitation Limit Page 18 of 39 SDG: 510757

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Certificate of Analysis Report Date: June 1, 2020 Company : Westinghouse Electric Company, LLC Address : PO Drawer R Columbia, South Carolina 29205

Contact:

Ms. Cynthia Logsdon Project: Soil and Vegetation Analysis Client Sample ID: HF1-B3-(2-4) Project: WNUC00821 Sample ID: 510757007 Client ID: WNUC008 Matrix: Soil Collect Date: 05-MAY-20 14:44 Receive Date: 06-MAY-20 Collector: Client Moisture: 8.9%

Parameter Qualifier Result Uncertainty MDC RL Units PF DF Analyst Date Time Batch Method Rad Alpha Spec Analysis Alphaspec U, Soil/Veg "Dry Weight Corrected" Uranium-233/234 3510 +/-99.5 5.06 0.500 pCi/g MP2 05/19/20 1147 1997576 1 Uranium-235/236 159 +/-23.6 2.72 0.500 pCi/g Uranium-238 582 +/-40.5 3.73 0.500 pCi/g Rad Liquid Scintillation Analysis Liquid Scint Tc99, Soil "As Received" Technetium-99 U -0.638 +/-2.39 4.21 5.00 pCi/g JJ3 05/12/20 0429 1995246 2 The following Prep Methods were performed:

Method Description Analyst Date Time Prep Batch Dry Soil Prep Dry Soil Prep GL-RAD-A-021 CXB7 05/06/20 1723 1995224 The following Analytical Methods were performed:

Method Description Analyst Comments 1 DOE EML HASL-300, U-02-RC Modified 2 DOE EML HASL-300, Tc-02-RC Modified Surrogate/Tracer Recovery Test Result Nominal Recovery% Acceptable Limits Uranium-232 Tracer Alphaspec U, Soil/Veg "Dry Weight Corrected" 66.5 (15%-125%)

Technetium-99m Tracer Liquid Scint Tc99, Soil "As Received" 93.3 (15%-125%)

Notes:

Counting Uncertainty is calculated at the 95% confidence level (1.96-sigma).

Column headers are defined as follows:

DF: Dilution Factor Lc/LC: Critical Level DL: Detection Limit PF: Prep Factor MDA: Minimum Detectable Activity RL: Reporting Limit MDC: Minimum Detectable Concentration SQL: Sample Quantitation Limit Page 19 of 39 SDG: 510757

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Certificate of Analysis Report Date: June 1, 2020 Company : Westinghouse Electric Company, LLC Address : PO Drawer R Columbia, South Carolina 29205

Contact:

Ms. Cynthia Logsdon Project: Soil and Vegetation Analysis Client Sample ID: HF1-B3-(4-6) Project: WNUC00821 Sample ID: 510757008 Client ID: WNUC008 Matrix: Soil Collect Date: 05-MAY-20 15:35 Receive Date: 06-MAY-20 Collector: Client Moisture: 13.9%

Parameter Qualifier Result Uncertainty MDC RL Units PF DF Analyst Date Time Batch Method Rad Alpha Spec Analysis Alphaspec U, Soil/Veg "Dry Weight Corrected" Uranium-233/234 5600 +/-137 6.49 0.500 pCi/g MP2 05/19/20 1147 1997576 1 Uranium-235/236 264 +/-33.1 5.06 0.500 pCi/g Uranium-238 948 +/-56.3 3.66 0.500 pCi/g Rad Liquid Scintillation Analysis Liquid Scint Tc99, Soil "As Received" Technetium-99 U -0.0340 +/-2.23 3.89 5.00 pCi/g JJ3 05/12/20 0445 1995246 2 The following Prep Methods were performed:

Method Description Analyst Date Time Prep Batch Dry Soil Prep Dry Soil Prep GL-RAD-A-021 CXB7 05/06/20 1723 1995224 The following Analytical Methods were performed:

Method Description Analyst Comments 1 DOE EML HASL-300, U-02-RC Modified 2 DOE EML HASL-300, Tc-02-RC Modified Surrogate/Tracer Recovery Test Result Nominal Recovery% Acceptable Limits Uranium-232 Tracer Alphaspec U, Soil/Veg "Dry Weight Corrected" 61.5 (15%-125%)

Technetium-99m Tracer Liquid Scint Tc99, Soil "As Received" 93 (15%-125%)

Notes:

Counting Uncertainty is calculated at the 95% confidence level (1.96-sigma).

Column headers are defined as follows:

DF: Dilution Factor Lc/LC: Critical Level DL: Detection Limit PF: Prep Factor MDA: Minimum Detectable Activity RL: Reporting Limit MDC: Minimum Detectable Concentration SQL: Sample Quantitation Limit Page 20 of 39 SDG: 510757

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Certificate of Analysis Report Date: June 1, 2020 Company : Westinghouse Electric Company, LLC Address : PO Drawer R Columbia, South Carolina 29205

Contact:

Ms. Cynthia Logsdon Project: Soil and Vegetation Analysis Client Sample ID: HF1-B3-(6-8) Project: WNUC00821 Sample ID: 510757009 Client ID: WNUC008 Matrix: Soil Collect Date: 05-MAY-20 16:20 Receive Date: 06-MAY-20 Collector: Client Moisture: 12.3%

Parameter Qualifier Result Uncertainty MDC RL Units PF DF Analyst Date Time Batch Method Rad Alpha Spec Analysis Alphaspec U, Soil/Veg "Dry Weight Corrected" Uranium-233/234 2790 +/-98.0 5.36 0.500 pCi/g MP2 05/19/20 1147 1997576 1 Uranium-235/236 171 +/-27.1 3.32 0.500 pCi/g Uranium-238 632 +/-46.6 4.21 0.500 pCi/g Rad Liquid Scintillation Analysis Liquid Scint Tc99, Soil "As Received" Technetium-99 U -1.07 +/-2.20 3.92 5.00 pCi/g JJ3 05/12/20 0502 1995246 2 The following Prep Methods were performed:

Method Description Analyst Date Time Prep Batch Dry Soil Prep Dry Soil Prep GL-RAD-A-021 CXB7 05/06/20 1723 1995224 The following Analytical Methods were performed:

Method Description Analyst Comments 1 DOE EML HASL-300, U-02-RC Modified 2 DOE EML HASL-300, Tc-02-RC Modified Surrogate/Tracer Recovery Test Result Nominal Recovery% Acceptable Limits Uranium-232 Tracer Alphaspec U, Soil/Veg "Dry Weight Corrected" 50.9 (15%-125%)

Technetium-99m Tracer Liquid Scint Tc99, Soil "As Received" 94.8 (15%-125%)

Notes:

Counting Uncertainty is calculated at the 95% confidence level (1.96-sigma).

Column headers are defined as follows:

DF: Dilution Factor Lc/LC: Critical Level DL: Detection Limit PF: Prep Factor MDA: Minimum Detectable Activity RL: Reporting Limit MDC: Minimum Detectable Concentration SQL: Sample Quantitation Limit Page 21 of 39 SDG: 510757

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Certificate of Analysis Report Date: June 1, 2020 Company : Westinghouse Electric Company, LLC Address : PO Drawer R Columbia, South Carolina 29205

Contact:

Ms. Cynthia Logsdon Project: Soil and Vegetation Analysis Client Sample ID: HF1-B3-(8-10) Project: WNUC00821 Sample ID: 510757010 Client ID: WNUC008 Matrix: Soil Collect Date: 05-MAY-20 17:22 Receive Date: 06-MAY-20 Collector: Client Moisture: 12.6%

Parameter Qualifier Result Uncertainty MDC RL Units PF DF Analyst Date Time Batch Method Rad Alpha Spec Analysis Alphaspec U, Soil/Veg "Dry Weight Corrected" Uranium-233/234 2600 +/-83.9 5.25 0.500 pCi/g MP2 05/19/20 1147 1997576 1 Uranium-235/236 139 +/-21.6 3.66 0.500 pCi/g Uranium-238 636 +/-41.5 4.19 0.500 pCi/g Rad Liquid Scintillation Analysis Liquid Scint Tc99, Soil "As Received" Technetium-99 U -2.17 +/-2.15 3.92 5.00 pCi/g JJ3 05/12/20 0518 1995246 2 The following Prep Methods were performed:

Method Description Analyst Date Time Prep Batch Dry Soil Prep Dry Soil Prep GL-RAD-A-021 CXB7 05/06/20 1723 1995224 The following Analytical Methods were performed:

Method Description Analyst Comments 1 DOE EML HASL-300, U-02-RC Modified 2 DOE EML HASL-300, Tc-02-RC Modified Surrogate/Tracer Recovery Test Result Nominal Recovery% Acceptable Limits Uranium-232 Tracer Alphaspec U, Soil/Veg "Dry Weight Corrected" 64.6 (15%-125%)

Technetium-99m Tracer Liquid Scint Tc99, Soil "As Received" 96.1 (15%-125%)

Notes:

Counting Uncertainty is calculated at the 95% confidence level (1.96-sigma).

Column headers are defined as follows:

DF: Dilution Factor Lc/LC: Critical Level DL: Detection Limit PF: Prep Factor MDA: Minimum Detectable Activity RL: Reporting Limit MDC: Minimum Detectable Concentration SQL: Sample Quantitation Limit Page 22 of 39 SDG: 510757

GEL LABORATORIES LLC 2040 Savage Road Charleston, SC 29407 - (843) 556-8171 - www.gel.com QC Summary Report Date: June 1, 2020 Westinghouse Electric Company, LLC Page 1 of 3 PO Drawer R Columbia, South Carolina

Contact:

Ms. Cynthia Logsdon Workorder: 510757 Parmname NOM Sample Qual QC Units RPD% REC% Range Anlst Date Time Ion Chromatography Batch 1995237 QC1204557123 510757001 DUP Fluoride 1.28 J 0.471 mg/kg 92.1 ^ (+/-1.10) LXA2 05/07/20 00:55 Nitrate-N 76.5 103 mg/kg 29.9 (0%-104%) 05/07/20 16:28 QC1204557122 LCS Fluoride 25.1 27.1 mg/kg 108 (90%-110%) 05/06/20 22:20 Nitrate-N 25.1 26.6 mg/kg 106 (90%-110%)

QC1204557121 MB Fluoride U ND mg/kg 05/06/20 21:49 Nitrate-N U ND mg/kg QC1204557125 510757001 MS Fluoride 27.4 1.28 10.7 mg/kg 34.2 * (75%-125%) 05/07/20 01:26 Nitrate-N 27.4 76.5 108 mg/kg 116 (75%-125%) 05/07/20 16:59 Batch 1996294 QC1204559298 510757006 DUP Fluoride 6.24 5.79 mg/kg 7.5 (0%-109%) LXA2 05/15/20 00:14 Nitrate-N 285 278 mg/kg 2.37 (0%-104%) 05/15/20 00:41 QC1204559297 LCS Fluoride 24.7 24.8 mg/kg 100 (90%-110%) 05/14/20 22:51 Nitrate-N 24.7 25.0 mg/kg 101 (90%-110%)

Page 23 of 39 SDG: 510757

GEL LABORATORIES LLC 2040 Savage Road Charleston, SC 29407 - (843) 556-8171 - www.gel.com QC Summary Workorder: 510757 Page 2 of 3 Parmname NOM Sample Qual QC Units RPD% REC% Range Anlst Date Time Ion Chromatography Batch 1996294 QC1204559296 MB Fluoride U ND mg/kg LXA2 05/14/20 21:55 Nitrate-N U ND mg/kg QC1204559300 510757006 MS Fluoride 26.8 6.24 12.7 mg/kg 24.1 * (75%-125%) 05/15/20 01:08 Nitrate-N 26.8 285 302 mg/kg N/A (75%-125%) 05/15/20 01:35 Titration and Ion Analysis Batch 1994735 QC1204556044 510581001 DUP Corrosivity H 4.81 H 5.15 SU 6.83 (0%-10%) RXB5 05/07/20 14:47 QC1204556042 LCS Corrosivity 7.00 7.00 SU 100 (95%-105%) 05/07/20 14:42 Notes:

The Qualifiers in this report are defined as follows:

< Result is less than value reported

> Result is greater than value reported B The target analyte was detected in the associated blank.

E General Chemistry--Concentration of the target analyte exceeds the instrument calibration range H Analytical holding time was exceeded J See case narrative for an explanation J Value is estimated N/A RPD or %Recovery limits do not apply.

N1 See case narrative ND Analyte concentration is not detected above the detection limit NJ Consult Case Narrative, Data Summary package, or Project Manager concerning this qualifier Q One or more quality control criteria have not been met. Refer to the applicable narrative or DER.

R Per section 9.3.4.1 of Method 1664 Revision B, due to matrix spike recovery issues, this result may not be reported or used for regulatory compliance purposes.

R Sample results are rejected Page 24 of 39 SDG: 510757

GEL LABORATORIES LLC 2040 Savage Road Charleston, SC 29407 - (843) 556-8171 - www.gel.com QC Summary Workorder: 510757 Page 3 of 3 Parmname NOM Sample Qual QC Units RPD% REC% Range Anlst Date Time U Analyte was analyzed for, but not detected above the MDL, MDA, MDC or LOD.

X Consult Case Narrative, Data Summary package, or Project Manager concerning this qualifier Z Paint Filter Test--Particulates passed through the filter, however no free liquids were observed.

^ RPD of sample and duplicate evaluated using +/-RL. Concentrations are <5X the RL. Qualifier Not Applicable for Radiochemistry.

d 5-day BOD--The 2:1 depletion requirement was not met for this sample e 5-day BOD--Test replicates show more than 30% difference between high and low values. The data is qualified per the method and can be used for reporting purposes h Preparation or preservation holding time was exceeded N/A indicates that spike recovery limits do not apply when sample concentration exceeds spike conc. by a factor of 4 or more or %RPD not applicable.

^ The Relative Percent Difference (RPD) obtained from the sample duplicate (DUP) is evaluated against the acceptance criteria when the sample is greater than five times (5X) the contract required detection limit (RL). In cases where either the sample or duplicate value is less than 5X the RL, a control limit of +/- the RL is used to evaluate the DUP result.

Indicates that a Quality Control parameter was not within specifications.

For PS, PSD, and SDILT results, the values listed are the measured amounts, not final concentrations.

Where the analytical method has been performed under NELAP certification, the analysis has met all of the requirements of the NELAC standard unless qualified on the QC Summary.

Page 25 of 39 SDG: 510757

GEL LABORATORIES LLC 2040 Savage Road Charleston, SC 29407 - (843) 556-8171 - www.gel.com QC Summary Report Date: June 1, 2020 Westinghouse Electric Company, LLC Page 1 of 3 PO Drawer R Columbia, South Carolina

Contact:

Ms. Cynthia Logsdon Workorder: 510757 Parmname NOM Sample Qual QC Units RPD% REC% Range Anlst Date Time Rad Alpha Spec Batch 1995261 QC1204557184 510752001 DUP Uranium-233/234 1.56 1.31 pCi/g 17.7 (0% - 100%) BXA4 05/09/20 08:39 Uncertainty +/-0.476 +/-0.436 Uranium-235/236 U 0.0219 U 0.0496 pCi/g N/A N/A Uncertainty +/-0.122 +/-0.136 Uranium-238 1.60 1.06 pCi/g 40.4 * (0%-20%)

Uncertainty +/-0.470 +/-0.376 QC1204557186 LCS Uranium-233/234 11.9 pCi/g 05/09/20 08:39 Uncertainty +/-1.09 Uranium-235/236 0.344 pCi/g Uncertainty +/-0.228 Uranium-238 12.5 13.2 pCi/g 106 (75%-125%)

Uncertainty +/-1.15 QC1204557183 MB Uranium-233/234 U -0.0435 pCi/g 05/09/20 08:39 Uncertainty +/-0.0855 Uranium-235/236 U -0.0501 pCi/g Uncertainty +/-0.0808 Uranium-238 U 0.0146 pCi/g Uncertainty +/-0.0813 Batch 1997576 QC1204562383 510757007 DUP Uranium-233/234 3510 2820 pCi/g 21.9 * (0%-20%) MP2 05/19/20 11:47 Uncertainty +/-99.5 +/-85.0 Uranium-235/236 159 128 pCi/g 21.6 * (0%-20%)

Uncertainty +/-23.6 +/-20.2 Uranium-238 582 417 pCi/g 33 * (0%-20%)

Uncertainty +/-40.5 +/-32.7 Page 26 of 39 SDG: 510757

GEL LABORATORIES LLC 2040 Savage Road Charleston, SC 29407 - (843) 556-8171 - www.gel.com QC Summary Workorder: 510757 Page 2 of 3 Parmname NOM Sample Qual QC Units RPD% REC% Range Anlst Date Time Rad Alpha Spec Batch 1997576 QC1204562384 LCS Uranium-233/234 71.6 pCi/g MP2 05/19/20 11:47 Uncertainty +/-16.2 Uranium-235/236 4.52 pCi/g Uncertainty +/-5.03 Uranium-238 97.3 97.1 pCi/g 99.8 (75%-125%)

Uncertainty +/-18.7 QC1204562382 MB Uranium-233/234 U 0.523 pCi/g 05/19/20 11:47 Uncertainty +/-1.70 Uranium-235/236 U 0.147 pCi/g Uncertainty +/-1.49 Uranium-238 U -0.153 pCi/g Uncertainty +/-0.856 Rad Liquid Scintillation Batch 1995246 QC1204557146 510757007 DUP Technetium-99 U -0.638 U -1.41 pCi/g N/A N/A JJ3 05/12/20 05:51 Uncertainty +/-2.39 +/-2.24 QC1204557147 LCS Technetium-99 59.9 52.9 pCi/g 88.3 (75%-125%) 05/12/20 06:08 Uncertainty +/-3.84 QC1204557145 MB Technetium-99 U -1.73 pCi/g 05/12/20 05:35 Uncertainty +/-2.25 Batch 1995247 QC1204557150 510757001 DUP Technetium-99 U -1.41 U -0.0762 pCi/g N/A N/A JJ3 05/12/20 08:22 Uncertainty +/-1.95 +/-2.19 QC1204557151 LCS Technetium-99 57.2 57.2 pCi/g 100 (75%-125%) 05/12/20 08:38 Uncertainty +/-3.64 QC1204557148 MB Technetium-99 U -1.52 pCi/g 05/12/20 07:49 Uncertainty +/-1.89 Page 27 of 39 SDG: 510757

GEL LABORATORIES LLC 2040 Savage Road Charleston, SC 29407 - (843) 556-8171 - www.gel.com QC Summary Workorder: 510757 Page 3 of 3 Parmname NOM Sample Qual QC Units RPD% REC% Range Anlst Date Time Notes:

Counting Uncertainty is calculated at the 95% confidence level (1.96-sigma).

The Qualifiers in this report are defined as follows:

- Analyte is a Tracer compound

< Result is less than value reported

> Result is greater than value reported BD Results are either below the MDC or tracer recovery is low FA Failed analysis.

H Analytical holding time was exceeded J See case narrative for an explanation J Value is estimated K Analyte present. Reported value may be biased high. Actual value is expected to be lower.