Text

WEC February 2021 CA Progress Report
	ML21187A313
Person / Time
Site:	Westinghouse
Issue date:	03/11/2021
From:	Joyner D; Westinghouse
To:	Kuhn K; Office of Nuclear Material Safety and Safeguards, State of SC, Dept of Health & Environmental Control
	Trefethen, JA
References
	LTR-RAC-21-24
	Download: ML21187A313 (91)
	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-21-24 March 11, 2021

Subject:

February 2021 CA Progress Report Ms. Kuhn:

In accordance with Item 19 of Consent Agreement (CA) 19-02-HW, this progress report is being submitted to you, including the following requested information:

(a) a brief description of the actions which Westinghouse has taken toward achieving compliance with the Consent Agreement during the previous month; (b) results of sampling and tests, in tabular summary format received by Westinghouse during the reporting period; (c) a brief description of all actions which are scheduled for the next month to achieve compliance with the Consent Agreement, and other information relating to the progress of the work as deemed necessary or requested by the Department; and (d) information regarding the percentage of work completed and any delays encountered or anticipated that may affect the approved schedule for implementation of the terms of the Consent Agreement, and a description of efforts made to mitigate delays or avoid anticipated delays.

In response to the above requirements, the following is being reported to the Department since the last progress report submitted on February 15, 2021. The following progress report is for work occurring from February 1- 28, 2021:

(a) Actions during the previous month:

Westinghouse began implementation of the Final Remedial Investigation (RI) Work Plan on 6/10/19. To comply with Item 4 of the CA, the following actions were completed this month.

Completed the following activities to support the Southern Storage Area (SSA) Operable Unit (OU) Work Plan:

Page 2 of 4 o Completed excavation and confirmatory soil sampling under intermodal container C-21 for tetrachloroethylene on February 23, 2021. Additional information is reported in section (b) Results of sampling and tests below.

Completed the following to support the Phase II RI Work Plan:

o Completed installation and development of permanent monitoring well W-106 on the Upper Sunset Lake Dike.

o Redeveloped permanent monitoring well W-25.

o Collected groundwater samples from all 14 newly installed wells (W-98-100, W-102-112).

o Collected the additional Primary Soil Gas Survey Area devices.

o Initiated investigative activities for groundwater screening borings L-48 through L-58 that were proposed in the January 14th teleconference:

Cleared paths to the boring locations.

Conducted underground utility survey.

Completed collection of lithologic data and groundwater screening at borings L-50, L-51 and L-56 through L-58.

Began collecting lithologic data from boring L-49 before drilling operations were postponed because of weather conditions.

o Submitted RI Phase II Work Plan Addendum Sediment Sampling Plan to Bound the Extent of Uranium Around SED-44 (LTR-RAC-21-20) on February 12, 2021.

o Continued East Lagoon closure activities.

(b) Results of sampling and tests:

Soil Sampling Underneath C-21 and Remediation

On September 10, 2020, initial soil sampling was conducted under intermodal container C-21.

o Systematic and bias soil sampling was conducted in accordance with the approved SSAOU Soil Sampling Work Plan.

o Additional soil sampling events were conducted on November 5, 2020 and January 26, 2021.

Results from initial and subsequent soil sampling events indicated that C-21 exceeded the RSL (0.0023 mg/kg) for tetrachloroethylene at locations C-21-A (bias) and C-21-3 (systematic) and at subsequent sampling location C-21a (bias).

Soil that exceeded the RSL for tetrachloroethylene was excavated, and the affected areas were sampled again (confirmatory sampling).

Two confirmatory soil sampling events were conducted underneath intermodal container C-21 on February 8, 2021 and February 23, 2021. All confirmatory results were below the RSL for tetrachloroethylene, meaning that the remedial action was complete.

Analytical results of the soil sampling along with a graphic are included in this monthly report as Attachments A-B.

Primary Soil Gas Survey Area

Results from the additional soil gas screening were received and identify two potential source areas for delineation via soil sampling. The Beacon Environmental Map Report of the Primary Soil Gas Survey Area is included in this monthly report as Attachment C.

Page 3 of 4 Groundwater Screening

Groundwater screening results from borings L-50, L-51 and L-56 through L-58 were received in February 2021. Groundwater from borings L-50 and L-51 was impacted with chlorinated volatile organic compounds (CVOCs) above the maximum contaminant level for tetrachloroethylene. Groundwater screening results from borings L-56 through L-58 indicate that the impacted groundwater does not migrate further to the west towards the property boundary. The groundwater screening analytical results for L-50, L-51 and L-56 through L-58 were tabulated and are included as Attachment D.

(c) Brief description of all actions which are scheduled for the next month:

In accordance with Item 4 of the CA, Westinghouse will continue to implement the Work Plan to include the following actions:

Complete the collection of lithologic data and groundwater screening from borings L-48, L-49 and L-52 through L-55.

Install pressure transducers in the five monitoring wells around the Gator Pond (W-4, W-15, W-16, W-27 and W-92).

Install the three additional staff gauges in the Phase II Remedial Investigation Work Plan

Install pressure transducers and VuLink telemetry systems at each staff gauge location.

Conduct sediment sampling in Upper Sunset Lake to bound impact at location SED-44 and in one additional sediment transect in Upper Sunset Lake approximately 25 feet west of the Upper Sunset Dike.

Host a site visit with DHEC on March 11 to observe sediment sampling in Upper Sunset Lake, East Lagoon closure activities, and groundwater screening.

Survey site installations (monitoring wells, staff gauges, etc) and lithologic borings to support further development of the Conceptual Site Model and the Black Mingo confining clay structure contour map.

Continue East Lagoon closure activities.

(d) Percentage of work completed and any delays encountered or anticipated:

25% of Phase II Work Scope Completed.

Currently there are no anticipated delays.

Respectfully,

Page 4 of 4 Diana P. Joyner Principal Environmental Engineer Westinghouse Electric Company, CFFF 803.497.7062 (m) cc: N. Parr, Environmental Manager J. Ferguson, EH&S Manager J. Grant, AECOM Project Manager ENOVIA Records Attachment A: SSAOU Tabulated Soil Sampling Results and Drawing Attachment B: C-21 Sampling Events and Lab Reports Attachment C: Beacon Environmental Map Report (Soil Gas Surveys)

Attachment D: Tabulated Groundwater Screening Results (L-50, L-51 and L-56 through L-58)

Attachment A SSAOU Tabulated Soil Sampling Results and Drawing Tabulated Soil Sampling Results for Intermodal Containers/Sealands C-21 Sampling Events:

September 10, 2020 November 5, 2020 January 26, 2021 February 8, 2021 February 23, 2021 Drawing with Soil Sampling Results

Sealand Soil Analysis Tetrachloroethylene Results Compilation C-21 Date Sampled ID < or = Result (mg/kg) Notes Lab Report #

9/10/2020 Systematic C-21-3 = 0.005040 GEL WO 521515 excavation required 9/10/2020 C-21-6 = 0.001280 Bias GEL WO 521515 11/5/2020 Bias C-21-A = 0.005630 GEL WO 526713 excavation required 11/5/2020 C-21-B = 0.000827 Bias GEL WO 526713 1/26/2021 Bias C-21-a = 0.002420 GEL WO 533288 excavation required 1/26/2021 C-21-b < 0.000387 Bias GEL WO 533288 2/8/2021 C-21-a-1 = 0.002260 Bias GEL WO 534641 2/8/2021 C-21-a-2 = 0.001170 Bias GEL WO 534641 2/23/2021 C-21-a-1-North < 0.000308 bias GEL WO 525611 2/23/2021 C-21-a-1-South < 0.000320 Bias GEL WO 525611 Residential Use Screening Level (RUSL): 0.0023 mg/kg

Page 2 of 2 Attachment B C-21 Sampling Events and Lab Reports First Sampling Event Reported in Nov 2020 Progress Report Sampling conducted: September 10,12 &15, 2020 GEL Work Order: 521515 Report Date: September 30, 2020 Second Sampling Event Sampling conducted: November 5, 2020 GEL Work Order: 526713 Report Date: November 11, 2020 Third Sampling Event Sampling conducted: January 26, 2021 GEL Work Order: 533288 Report Date: February 3, 2021 Confirmatory Sampling Event Sampling conducted: February 8, 2021 GEL Work Order: 534641 Report Date: February 16, 2021 Confirmatory Sampling Event Sampling conducted: February 23, 2021 GEL Work Order: 535611 Report Date: February 26, 2021

November 11, 2020 Ms. Cynthia Teague Westinghouse Electric Company, LLC PO Drawer R Columbia, South Carolina 29205 Re: Sealand Soil Sampling Work Order: 526713

Dear Ms. Teague:

GEL Laboratories, LLC (GEL) appreciates the opportunity to provide the enclosed analytical results for the sample(s) we received on November 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. 4443.

Sincerely, PM_SIGN_HERE Lindsay Fabra Project Manager Purchase Order: PO 4500778461 Enclosures Page 1 of 25 SDG: 526713

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 (843) 5568171 www.gel.com Certificate of Analysis Report for WNUC009 Westinghouse Electric Co, LLC Client SDG: 526713 GEL Work Order: 526713 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 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, Lindsay Fabra.

Reviewed by USER_SIGN_HERE Page 2 of 25 SDG: 526713

Analytical Detections Summary SDG/Report# 526713 Client Westinghouse Electric Co, LLC Project ID Sealand Soil Sampling GEL ID Client Sample ID Method CAS Analyte Result Q 526713001 C-21-A SW846 8260D 127-18-4 Tetrachloroethylene 0.00563 mg/kg NOTE: This report only lists detections greater than the reporting level. Reporting level is the LOQ, PQL, MDC, or Client-provided limit.

Page 3 of 25 SDG: 526713

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Certificate of Analysis Report Date: November 11, 2020 Company : Westinghouse Electric Company, LLC Address : PO Drawer R Columbia, South Carolina 29205

Contact:

Ms. Cynthia Teague Project: Sealand Soil Sampling Client Sample ID: C-21-A Project: WNUCSealand Sample ID: 526713001 Client ID: WNUC009 Matrix: Soil Collect Date: 05-NOV-20 14:07 Receive Date: 06-NOV-20 Collector: Client Moisture: 6.42%

Parameter Qualifier Result DL RL Units PF DF Analyst Date Time Batch Method Volatile Organics Totals Tetrachloroethylene VOA only "Dry Weight Corrected" Tetrachloroethylene 0.00563 0.000292 0.000877 mg/kg 0.821 1 JP1 11/09/20 1951 2060807 1 The following Prep Methods were performed:

Method Description Analyst Date Time Prep Batch SW846 5035 5035 Prep JP1 11/05/20 1407 2060806 The following Analytical Methods were performed:

Method Description Analyst Comments 1 SW846 8260D Surrogate/Tracer Recovery Test Result Nominal Recovery% Acceptable Limits 1,2-Dichloroethane-d4 Totals Tetrachloroethylene VOA only "Dry Weight 0.0428 mg/kg 0.0500 98 (81%-124%)

Corrected" Bromofluorobenzene Totals Tetrachloroethylene VOA only "Dry Weight 0.0432 mg/kg 0.0500 98 (70%-130%)

Corrected" Toluene-d8 Totals Tetrachloroethylene VOA only "Dry Weight 0.0420 mg/kg 0.0500 96 (81%-120%)

Corrected" 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 25 SDG: 526713

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Certificate of Analysis Report Date: November 11, 2020 Company : Westinghouse Electric Company, LLC Address : PO Drawer R Columbia, South Carolina 29205

Contact:

Ms. Cynthia Teague Project: Sealand Soil Sampling Client Sample ID: C-21-B Project: WNUCSealand Sample ID: 526713002 Client ID: WNUC009 Matrix: Soil Collect Date: 05-NOV-20 14:15 Receive Date: 06-NOV-20 Collector: Client Moisture: 4.98%

Parameter Qualifier Result DL RL Units PF DF Analyst Date Time Batch Method Volatile Organics Totals Tetrachloroethylene VOA only "Dry Weight Corrected" Tetrachloroethylene J 0.000827 0.000296 0.000889 mg/kg 0.845 1 PXY1 11/10/20 1440 2060807 1 The following Prep Methods were performed:

Method Description Analyst Date Time Prep Batch SW846 5035 5035 Prep JP1 11/05/20 1415 2060806 The following Analytical Methods were performed:

Method Description Analyst Comments 1 SW846 8260D Surrogate/Tracer Recovery Test Result Nominal Recovery% Acceptable Limits 1,2-Dichloroethane-d4 Totals Tetrachloroethylene VOA only "Dry Weight 0.0425 mg/kg 0.0500 96 (81%-124%)

Corrected" Bromofluorobenzene Totals Tetrachloroethylene VOA only "Dry Weight 0.0439 mg/kg 0.0500 99 (70%-130%)

Corrected" Toluene-d8 Totals Tetrachloroethylene VOA only "Dry Weight 0.0424 mg/kg 0.0500 95 (81%-120%)

Corrected" 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 25 SDG: 526713

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Certificate of Analysis Report Date: November 11, 2020 Company : Westinghouse Electric Company, LLC Address : PO Drawer R Columbia, South Carolina 29205

Contact:

Ms. Cynthia Teague Project: Sealand Soil Sampling Client Sample ID: C-22-C Project: WNUCSealand Sample ID: 526713003 Client ID: WNUC009 Matrix: Soil Collect Date: 05-NOV-20 14:21 Receive Date: 06-NOV-20 Collector: Client Moisture: 7.11%

Parameter Qualifier Result DL RL Units PF DF Analyst Date Time Batch Method Volatile Organics Totals Tetrachloroethylene VOA only "Dry Weight Corrected" Tetrachloroethylene U ND 0.000316 0.000949 mg/kg 0.882 1 JP1 11/09/20 2045 2060807 1 The following Prep Methods were performed:

Method Description Analyst Date Time Prep Batch SW846 5035 5035 Prep JP1 11/05/20 1421 2060806 The following Analytical Methods were performed:

Method Description Analyst Comments 1 SW846 8260D Surrogate/Tracer Recovery Test Result Nominal Recovery% Acceptable Limits 1,2-Dichloroethane-d4 Totals Tetrachloroethylene VOA only "Dry Weight 0.0446 mg/kg 0.0500 94 (81%-124%)

Corrected" Bromofluorobenzene Totals Tetrachloroethylene VOA only "Dry Weight 0.0472 mg/kg 0.0500 99 (70%-130%)

Corrected" Toluene-d8 Totals Tetrachloroethylene VOA only "Dry Weight 0.0460 mg/kg 0.0500 97 (81%-120%)

Corrected" 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 25 SDG: 526713

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Certificate of Analysis Report Date: November 11, 2020 Company : Westinghouse Electric Company, LLC Address : PO Drawer R Columbia, South Carolina 29205

Contact:

Ms. Cynthia Teague Project: Sealand Soil Sampling Client Sample ID: C-22-D Project: WNUCSealand Sample ID: 526713004 Client ID: WNUC009 Matrix: Soil Collect Date: 05-NOV-20 14:29 Receive Date: 06-NOV-20 Collector: Client Moisture: 7.12%

Parameter Qualifier Result DL RL Units PF DF Analyst Date Time Batch Method Volatile Organics Totals Tetrachloroethylene VOA only "Dry Weight Corrected" Tetrachloroethylene J 0.000839 0.000363 0.00109 mg/kg 1.01 1 JP1 11/09/20 2112 2060807 1 The following Prep Methods were performed:

Method Description Analyst Date Time Prep Batch SW846 5035 5035 Prep JP1 11/05/20 1429 2060806 The following Analytical Methods were performed:

Method Description Analyst Comments 1 SW846 8260D Surrogate/Tracer Recovery Test Result Nominal Recovery% Acceptable Limits 1,2-Dichloroethane-d4 Totals Tetrachloroethylene VOA only "Dry Weight 0.0510 mg/kg 0.0500 94 (81%-124%)

Corrected" Bromofluorobenzene Totals Tetrachloroethylene VOA only "Dry Weight 0.0533 mg/kg 0.0500 98 (70%-130%)

Corrected" Toluene-d8 Totals Tetrachloroethylene VOA only "Dry Weight 0.0530 mg/kg 0.0500 97 (81%-120%)

Corrected" 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 25 SDG: 526713

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Certificate of Analysis Report Date: November 11, 2020 Company : Westinghouse Electric Company, LLC Address : PO Drawer R Columbia, South Carolina 29205

Contact:

Ms. Cynthia Teague Project: Sealand Soil Sampling Client Sample ID: C-23-E Project: WNUCSealand Sample ID: 526713005 Client ID: WNUC009 Matrix: Soil Collect Date: 05-NOV-20 14:38 Receive Date: 06-NOV-20 Collector: Client Moisture: 6.21%

Parameter Qualifier Result DL RL Units PF DF Analyst Date Time Batch Method Volatile Organics Totals Tetrachloroethylene VOA only "Dry Weight Corrected" Tetrachloroethylene U ND 0.000273 0.000819 mg/kg 0.768 1 JP1 11/09/20 2138 2060807 1 The following Prep Methods were performed:

Method Description Analyst Date Time Prep Batch SW846 5035 5035 Prep JP1 11/05/20 1438 2060806 The following Analytical Methods were performed:

Method Description Analyst Comments 1 SW846 8260D Surrogate/Tracer Recovery Test Result Nominal Recovery% Acceptable Limits 1,2-Dichloroethane-d4 Totals Tetrachloroethylene VOA only "Dry Weight 0.0403 mg/kg 0.0500 98 (81%-124%)

Corrected" Bromofluorobenzene Totals Tetrachloroethylene VOA only "Dry Weight 0.0397 mg/kg 0.0500 97 (70%-130%)

Corrected" Toluene-d8 Totals Tetrachloroethylene VOA only "Dry Weight 0.0385 mg/kg 0.0500 94 (81%-120%)

Corrected" 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 25 SDG: 526713

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Certificate of Analysis Report Date: November 11, 2020 Company : Westinghouse Electric Company, LLC Address : PO Drawer R Columbia, South Carolina 29205

Contact:

Ms. Cynthia Teague Project: Sealand Soil Sampling Client Sample ID: C-23-F Project: WNUCSealand Sample ID: 526713006 Client ID: WNUC009 Matrix: Soil Collect Date: 05-NOV-20 14:45 Receive Date: 06-NOV-20 Collector: Client Moisture: 8.16%

Parameter Qualifier Result DL RL Units PF DF Analyst Date Time Batch Method Volatile Organics Totals Tetrachloroethylene VOA only "Dry Weight Corrected" Tetrachloroethylene U ND 0.000300 0.000901 mg/kg 0.828 1 JP1 11/09/20 2205 2060807 1 The following Prep Methods were performed:

Method Description Analyst Date Time Prep Batch SW846 5035 5035 Prep JP1 11/05/20 1445 2060806 The following Analytical Methods were performed:

Method Description Analyst Comments 1 SW846 8260D Surrogate/Tracer Recovery Test Result Nominal Recovery% Acceptable Limits 1,2-Dichloroethane-d4 Totals Tetrachloroethylene VOA only "Dry Weight 0.0421 mg/kg 0.0500 93 (81%-124%)

Corrected" Bromofluorobenzene Totals Tetrachloroethylene VOA only "Dry Weight 0.0433 mg/kg 0.0500 96 (70%-130%)

Corrected" Toluene-d8 Totals Tetrachloroethylene VOA only "Dry Weight 0.0432 mg/kg 0.0500 96 (81%-120%)

Corrected" 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 25 SDG: 526713

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Certificate of Analysis Report Date: November 11, 2020 Company : Westinghouse Electric Company, LLC Address : PO Drawer R Columbia, South Carolina 29205

Contact:

Ms. Cynthia Teague Project: Sealand Soil Sampling Client Sample ID: C-21-A Project: WNUCSealand Sample ID: 526713001 Client ID: WNUC009 Matrix: Soil Collect Date: 05-NOV-20 14:07 Receive Date: 06-NOV-20 Collector: Client Moisture: 6.42%

Parameter Qualifier Result Uncertainty MDC RL Units PF DF Analyst Date Time Batch Method 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 25 SDG: 526713

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Certificate of Analysis Report Date: November 11, 2020 Company : Westinghouse Electric Company, LLC Address : PO Drawer R Columbia, South Carolina 29205

Contact:

Ms. Cynthia Teague Project: Sealand Soil Sampling Client Sample ID: C-21-B Project: WNUCSealand Sample ID: 526713002 Client ID: WNUC009 Matrix: Soil Collect Date: 05-NOV-20 14:15 Receive Date: 06-NOV-20 Collector: Client Moisture: 4.98%

Parameter Qualifier Result Uncertainty MDC RL Units PF DF Analyst Date Time Batch Method 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 25 SDG: 526713

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Certificate of Analysis Report Date: November 11, 2020 Company : Westinghouse Electric Company, LLC Address : PO Drawer R Columbia, South Carolina 29205

Contact:

Ms. Cynthia Teague Project: Sealand Soil Sampling Client Sample ID: C-22-C Project: WNUCSealand Sample ID: 526713003 Client ID: WNUC009 Matrix: Soil Collect Date: 05-NOV-20 14:21 Receive Date: 06-NOV-20 Collector: Client Moisture: 7.11%

Parameter Qualifier Result Uncertainty MDC RL Units PF DF Analyst Date Time Batch Method 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 25 SDG: 526713

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Certificate of Analysis Report Date: November 11, 2020 Company : Westinghouse Electric Company, LLC Address : PO Drawer R Columbia, South Carolina 29205

Contact:

Ms. Cynthia Teague Project: Sealand Soil Sampling Client Sample ID: C-22-D Project: WNUCSealand Sample ID: 526713004 Client ID: WNUC009 Matrix: Soil Collect Date: 05-NOV-20 14:29 Receive Date: 06-NOV-20 Collector: Client Moisture: 7.12%

Parameter Qualifier Result Uncertainty MDC RL Units PF DF Analyst Date Time Batch Method 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 25 SDG: 526713

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Certificate of Analysis Report Date: November 11, 2020 Company : Westinghouse Electric Company, LLC Address : PO Drawer R Columbia, South Carolina 29205

Contact:

Ms. Cynthia Teague Project: Sealand Soil Sampling Client Sample ID: C-23-E Project: WNUCSealand Sample ID: 526713005 Client ID: WNUC009 Matrix: Soil Collect Date: 05-NOV-20 14:38 Receive Date: 06-NOV-20 Collector: Client Moisture: 6.21%

Parameter Qualifier Result Uncertainty MDC RL Units PF DF Analyst Date Time Batch Method 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 25 SDG: 526713

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Certificate of Analysis Report Date: November 11, 2020 Company : Westinghouse Electric Company, LLC Address : PO Drawer R Columbia, South Carolina 29205

Contact:

Ms. Cynthia Teague Project: Sealand Soil Sampling Client Sample ID: C-23-F Project: WNUCSealand Sample ID: 526713006 Client ID: WNUC009 Matrix: Soil Collect Date: 05-NOV-20 14:45 Receive Date: 06-NOV-20 Collector: Client Moisture: 8.16%

Parameter Qualifier Result Uncertainty MDC RL Units PF DF Analyst Date Time Batch Method 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 25 SDG: 526713

GEL LABORATORIES LLC 2040 Savage Road Charleston, SC 29407 - (843) 556-8171 - www.gel.com QC Summary Report Date: November 11, 2020 Westinghouse Electric Company, LLC Page 1 of 3 PO Drawer R Columbia, South Carolina

Contact:

Ms. Cynthia Teague Workorder: 526713 Parmname NOM Sample Qual QC Units RPD% REC% Range Anlst Date Time Volatile-GC/MS Batch 2060807 QC1204690065 LCS Tetrachloroethylene 0.0500 0.0462 mg/kg 92 (68%-129%) JP1 11/09/20 16:44

- 1,2-Dichloroethane-d4 50.0 52.8 ug/L 106 (81%-124%)

- Bromofluorobenzene 50.0 48.7 ug/L 97 (70%-130%)

- Toluene-d8 50.0 47.8 ug/L 96 (81%-120%)

QC1204691060 LCS Tetrachloroethylene 0.0500 0.0543 mg/kg 109 (68%-129%) PXY1 11/10/20 11:33

- 1,2-Dichloroethane-d4 50.0 50.4 ug/L 101 (81%-124%)

- Bromofluorobenzene 50.0 49.4 ug/L 99 (70%-130%)

- Toluene-d8 50.0 48.7 ug/L 97 (81%-120%)

QC1204690066 LCSD Tetrachloroethylene 0.0500 0.0449 mg/kg 3 90 (0%-20%) JP1 11/09/20 17:11

- 1,2-Dichloroethane-d4 50.0 50.5 ug/L 101 (81%-124%)

- Bromofluorobenzene 50.0 48.1 ug/L 96 (70%-130%)

- Toluene-d8 50.0 47.7 ug/L 95 (81%-120%)

QC1204690064 MB Tetrachloroethylene U ND mg/kg 11/09/20 18:58 Page 16 of 25 SDG: 526713

GEL LABORATORIES LLC 2040 Savage Road Charleston, SC 29407 - (843) 556-8171 - www.gel.com QC Summary Workorder: 526713 Page 2 of 3 Parmname NOM Sample Qual QC Units RPD% REC% Range Anlst Date Time Volatile-GC/MS Batch 2060807

- 1,2-Dichloroethane-d4 50.0 49.7 ug/L 99 (81%-124%) JP1 11/09/20 18:58

- Bromofluorobenzene 50.0 49.3 ug/L 99 (70%-130%)

- Toluene-d8 50.0 48.6 ug/L 97 (81%-120%)

QC1204691059 MB Tetrachloroethylene U ND mg/kg PXY1 11/10/20 13:20

- 1,2-Dichloroethane-d4 50.0 50.2 ug/L 100 (81%-124%)

- Bromofluorobenzene 50.0 49.6 ug/L 99 (70%-130%)

- Toluene-d8 50.0 49.3 ug/L 99 (81%-120%)

Notes:

The Qualifiers in this report are defined as follows:

- Analyte is a surrogate compound

< Result is less than value reported

> Result is greater than value reported A The TIC is a suspected aldol-condensation product B The target analyte was detected in the associated blank.

C Analyte has been confirmed by GC/MS analysis D Results are reported from a diluted aliquot of the sample E 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 JNX Non Calibrated Compound N Organics--Presumptive evidence based on mass spectral library search to make a tentative identification of the analyte (TIC). Quantitation is based on nearest internal standard response factor N Presumptive evidence based on mass spectral library search to make a tentative identification of the analyte (TIC). Quantitation is based on nearest internal standard response factor N/A RPD or %Recovery limits do not apply.

Page 17 of 25 SDG: 526713

GEL LABORATORIES LLC 2040 Savage Road Charleston, SC 29407 - (843) 556-8171 - www.gel.com QC Summary Workorder: 526713 Page 3 of 3 Parmname NOM Sample Qual QC Units RPD% REC% Range Anlst Date Time 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 P Organics--The concentrations between the primary and confirmation columns/detectors is >40% different. For HPLC, the difference is >70%.

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.

UJ Compound cannot be extracted X Consult Case Narrative, Data Summary package, or Project Manager concerning this qualifier Y QC Samples were not spiked with this compound

^ 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 18 of 25 SDG: 526713

GEL LABORATORIES LLC 2040 Savage Road Charleston, SC 29407 - (843) 556-8171 - www.gel.com QC Summary Report Date: November 11, 2020 Westinghouse Electric Company, LLC Page 1 of 2 PO Drawer R Columbia, South Carolina

Contact:

Ms. Cynthia Teague Workorder: 526713 Parmname NOM Sample Qual QC Units RPD% REC% Range Anlst Date Time Notes:

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.

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 Page 19 of 25 SDG: 526713

GEL LABORATORIES LLC 2040 Savage Road Charleston, SC 29407 - (843) 556-8171 - www.gel.com QC Summary Workorder: 526713 Page 2 of 2 Parmname NOM Sample Qual QC Units RPD% REC% Range Anlst Date Time 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 20 of 25 SDG: 526713

Technical Case Narrative Westinghouse Electric Co, LLC SDG #: 526713 GC/MS Volatile Product: Volatile Organic Compounds (VOC) by Gas Chromatograph/Mass Spectrometer Analytical Method: SW846 8260D Analytical Procedure: GL-OA-E-038 REV# 28 Analytical Batch: 2060807 Preparation Method: SW846 5035 Preparation Procedure: GL-OA-E-039 REV# 13 Preparation Batch: 2060806 The following samples were analyzed using the above methods and analytical procedure(s).

GEL Sample ID# Client Sample Identification 526713001 C-21-A 526713002 C-21-B 526713003 C-22-C 526713004 C-22-D 526713005 C-23-E 526713006 C-23-F 1204690064 Method Blank (MB) 1204690065 Laboratory Control Sample (LCS) 1204690066 Laboratory Control Sample Duplicate (LCSD) 1204691059 Method Blank (MB) 1204691060 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.

Technical Information Sample Re-extraction/Re-analysis Sample 526713003 (C-22-C) was re-analyzed due to unacceptable surrogate or internal standard recoveries in the initial analysis. The re-analyses confirmed/and or passed and were reported.

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

Preparation Procedure: GL-OA-E-020 REV# 13 Preparation Batch: 2060271 Page 21 of 25 SDG: 526713

The following samples were analyzed using the above methods and analytical procedure(s).

GEL Sample ID# Client Sample Identification 526713001 C-21-A 526713002 C-21-B 526713004 C-22-D 526713005 C-23-E 526713006 C-23-F 1204688783 526713001(C-21-A) 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: Dry Weight Preparation Method: ASTM D 2216 (Modified)

Preparation Procedure: GL-OA-E-020 REV# 13 Preparation Batch: 2060827 The following samples were analyzed using the above methods and analytical procedure(s).

GEL Sample ID# Client Sample Identification 526713003 C-22-C 1204690111 526713003(C-22-C) 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.

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 22 of 25 SDG: 526713

Page 23 of 25 SDG: 526713 Page 24 of 25 SDG: 526713 List of current GEL Certifications as of 11 November 2020 State Certification Alabama 42200 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 SC0001220211 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 SC00012202033 Vermont VT87156 Virginia NELAP 460202 Washington C780 Page 25 of 25 SDG: 526713

February 03, 2021 Ms. Cynthia Teague Westinghouse Electric Company, LLC PO Drawer R Columbia, South Carolina 29205 Re: Sealand Soil Sampling Work Order: 533288

Dear Ms. Teague:

GEL Laboratories, LLC (GEL) appreciates the opportunity to provide the enclosed analytical results for the sample(s) we received on January 27, 2021. 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. 4443.

Sincerely, Samuel PM_SIGN_HERE Hogan for Lindsay Fabra Project Manager Purchase Order: PO 4500778461 Enclosures Page 1 of 12 SDG: 533288

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 (843) 5568171 www.gel.com Certificate of Analysis Report for WNUC009 Westinghouse Electric Co, LLC (4500778461)

Client SDG: 533288 GEL Work Order: 533288 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 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, Lindsay Fabra.

Reviewed by USER_SIGN_HERE Page 2 of 12 SDG: 533288

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Certificate of Analysis Report Date: February 3, 2021 Company : Westinghouse Electric Company, LLC Address : PO Drawer R Columbia, South Carolina 29205

Contact:

Ms. Cynthia Teague Project: Sealand Soil Sampling Client Sample ID: C-21-a Project: WNUCSealand Sample ID: 533288001 Client ID: WNUC009 Matrix: Soil Collect Date: 26-JAN-21 14:55 Receive Date: 27-JAN-21 Collector: Client Moisture: 9.66%

Parameter Qualifier Result DL RL Units PF DF Analyst Date Time Batch Method Volatile Organics Totals Tetrachloroethylene VOA only "Dry Weight Corrected" Tetrachloroethylene 0.00242 0.000298 0.000896 mg/kg 0.809 1 PXY1 02/02/21 1531 2087144 1 The following Prep Methods were performed:

Method Description Analyst Date Time Prep Batch SW846 5035 5035 Prep PXY1 01/26/21 1455 2087142 The following Analytical Methods were performed:

Method Description Analyst Comments 1 SW846 8260D Surrogate/Tracer Recovery Test Result Nominal Recovery% Acceptable Limits 1,2-Dichloroethane-d4 Totals Tetrachloroethylene VOA only "Dry Weight 0.0454 mg/kg 0.0500 101 (76%-127%)

Corrected" Bromofluorobenzene Totals Tetrachloroethylene VOA only "Dry Weight 0.0453 mg/kg 0.0500 101 (70%-130%)

Corrected" Toluene-d8 Totals Tetrachloroethylene VOA only "Dry Weight 0.0446 mg/kg 0.0500 100 (81%-120%)

Corrected" 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 12 SDG: 533288

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Certificate of Analysis Report Date: February 3, 2021 Company : Westinghouse Electric Company, LLC Address : PO Drawer R Columbia, South Carolina 29205

Contact:

Ms. Cynthia Teague Project: Sealand Soil Sampling Client Sample ID: C-21-b Project: WNUCSealand Sample ID: 533288002 Client ID: WNUC009 Matrix: Soil Collect Date: 26-JAN-21 15:01 Receive Date: 27-JAN-21 Collector: Client Moisture: 12.5%

Parameter Qualifier Result DL RL Units PF DF Analyst Date Time Batch Method Volatile Organics Totals Tetrachloroethylene VOA only "Dry Weight Corrected" Tetrachloroethylene U ND 0.000387 0.00116 mg/kg 1.02 1 PXY1 01/29/21 2038 2087144 1 The following Prep Methods were performed:

Method Description Analyst Date Time Prep Batch SW846 5035 5035 Prep PXY1 01/26/21 1501 2087142 The following Analytical Methods were performed:

Method Description Analyst Comments 1 SW846 8260D Surrogate/Tracer Recovery Test Result Nominal Recovery% Acceptable Limits 1,2-Dichloroethane-d4 Totals Tetrachloroethylene VOA only "Dry Weight 0.0578 mg/kg 0.0500 100 (81%-124%)

Corrected" Bromofluorobenzene Totals Tetrachloroethylene VOA only "Dry Weight 0.0618 mg/kg 0.0500 106 (70%-130%)

Corrected" Toluene-d8 Totals Tetrachloroethylene VOA only "Dry Weight 0.0581 mg/kg 0.0500 100 (81%-120%)

Corrected" 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 12 SDG: 533288

GEL LABORATORIES LLC 2040 Savage Road Charleston, SC 29407 - (843) 556-8171 - www.gel.com QC Summary Report Date: February 3, 2021 Westinghouse Electric Company, LLC Page 1 of 3 PO Drawer R Columbia, South Carolina

Contact:

Ms. Cynthia Teague Workorder: 533288 Parmname NOM Sample Qual QC Units RPD% REC% Range Anlst Date Time Volatile-GC/MS Batch 2087144 QC1204743513 LCS Tetrachloroethylene 0.0500 0.0453 mg/kg 91 (68%-129%) PXY1 01/29/21 10:28

- 1,2-Dichloroethane-d4 50.0 53.5 ug/L 107 (81%-124%)

- Bromofluorobenzene 50.0 54.0 ug/L 108 (70%-130%)

- Toluene-d8 50.0 52.0 ug/L 104 (81%-120%)

QC1204745019 LCS Tetrachloroethylene 0.0500 0.0469 mg/kg 94 (70%-125%) 02/02/21 10:04

- 1,2-Dichloroethane-d4 50.0 50.7 ug/L 101 (76%-127%)

- Bromofluorobenzene 50.0 50.3 ug/L 101 (70%-130%)

- Toluene-d8 50.0 50.4 ug/L 101 (81%-120%)

QC1204743514 LCSD Tetrachloroethylene 0.0500 0.0459 mg/kg 1 92 (0%-20%) 01/29/21 10:56

- 1,2-Dichloroethane-d4 50.0 52.0 ug/L 104 (81%-124%)

- Bromofluorobenzene 50.0 52.0 ug/L 104 (70%-130%)

- Toluene-d8 50.0 50.9 ug/L 102 (81%-120%)

QC1204743512 MB Tetrachloroethylene U ND mg/kg 01/29/21 13:22 Page 5 of 12 SDG: 533288

GEL LABORATORIES LLC 2040 Savage Road Charleston, SC 29407 - (843) 556-8171 - www.gel.com QC Summary Workorder: 533288 Page 2 of 3 Parmname NOM Sample Qual QC Units RPD% REC% Range Anlst Date Time Volatile-GC/MS Batch 2087144

- 1,2-Dichloroethane-d4 50.0 51.2 ug/L 102 (81%-124%) PXY1 01/29/21 13:22

- Bromofluorobenzene 50.0 51.9 ug/L 104 (70%-130%)

- Toluene-d8 50.0 51.4 ug/L 103 (81%-120%)

QC1204745018 MB Tetrachloroethylene U ND mg/kg 02/02/21 12:32

- 1,2-Dichloroethane-d4 50.0 50.2 ug/L 100 (76%-127%)

- Bromofluorobenzene 50.0 50.4 ug/L 101 (70%-130%)

- Toluene-d8 50.0 50.7 ug/L 101 (81%-120%)

Notes:

The Qualifiers in this report are defined as follows:

- Analyte is a surrogate compound

< Result is less than value reported

> Result is greater than value reported A The TIC is a suspected aldol-condensation product B The target analyte was detected in the associated blank.

C Analyte has been confirmed by GC/MS analysis D Results are reported from a diluted aliquot of the sample E 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 JNX Non Calibrated Compound N Organics--Presumptive evidence based on mass spectral library search to make a tentative identification of the analyte (TIC). Quantitation is based on nearest internal standard response factor N Presumptive evidence based on mass spectral library search to make a tentative identification of the analyte (TIC). Quantitation is based on nearest internal standard response factor N/A RPD or %Recovery limits do not apply.

Page 6 of 12 SDG: 533288

GEL LABORATORIES LLC 2040 Savage Road Charleston, SC 29407 - (843) 556-8171 - www.gel.com QC Summary Workorder: 533288 Page 3 of 3 Parmname NOM Sample Qual QC Units RPD% REC% Range Anlst Date Time 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 P Organics--The concentrations between the primary and confirmation columns/detectors is >40% different. For HPLC, the difference is >70%.

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.

UJ Compound cannot be extracted X Consult Case Narrative, Data Summary package, or Project Manager concerning this qualifier Y QC Samples were not spiked with this compound

^ 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 7 of 12 SDG: 533288

Technical Case Narrative Westinghouse Electric Co, LLC SDG #: 533288 GC/MS Volatile Product: Volatile Organic Compounds (VOC) by Gas Chromatograph/Mass Spectrometer Analytical Method: SW846 8260D Analytical Procedure: GL-OA-E-038 REV# 28 Analytical Batch: 2087144 Preparation Method: SW846 5035 Preparation Procedure: GL-OA-E-039 REV# 13 Preparation Batch: 2087142 The following samples were analyzed using the above methods and analytical procedure(s).

GEL Sample ID# Client Sample Identification 533288001 C-21-a 533288002 C-21-b 1204743512 Method Blank (MB) 1204743513 Laboratory Control Sample (LCS) 1204743514 Laboratory Control Sample Duplicate (LCSD) 1204745018 Method Blank (MB) 1204745019 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.

Technical Information Sample Re-extraction/Re-analysis Sample 533288001 (C-21-a) was re-analyzed due to unacceptable surrogate or internal standard recoveries in the initial analysis. The re-analyses confirmed/and or passed and were reported.

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

Preparation Procedure: GL-OA-E-020 REV# 13 Preparation Batch: 2086192 The following samples were analyzed using the above methods and analytical procedure(s).

GEL Sample ID# Client Sample Identification Page 8 of 12 SDG: 533288

533288001 C-21-a 533288002 C-21-b 1204741708 533382001(NonSDG) 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.

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 9 of 12 SDG: 533288

Page 10 of 12 SDG: 533288 Page 11 of 12 SDG: 533288 List of current GEL Certifications as of 03 February 2021 State Certification Alabama 42200 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 SC0001220211 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 T1047042352118 Utah NELAP SC00012202034 Vermont VT87156 Virginia NELAP 460202 Washington C780 Page 12 of 12 SDG: 533288

February 16, 2021 Ms. Cynthia Teague Westinghouse Electric Company, LLC PO Drawer R Columbia, South Carolina 29205 Re: Sealand Soil Sampling Work Order: 534641

Dear Ms. Teague:

GEL Laboratories, LLC (GEL) appreciates the opportunity to provide the enclosed analytical results for the sample(s) we received on February 10, 2021. 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. 4443.

Sincerely, PM_SIGN_HERE Lindsay Fabra Project Manager Purchase Order: PO 4500778461 Enclosures Page 1 of 17 SDG: 534641

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 (843) 5568171 www.gel.com Certificate of Analysis Report for WNUC009 Westinghouse Electric Co, LLC (4500778461)

Client SDG: 534641 GEL Work Order: 534641 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 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, Lindsay Fabra.

Reviewed by USER_SIGN_HERE Page 2 of 17 SDG: 534641

Analytical Detections Summary SDG/Report# 534641 Client Westinghouse Electric Co, LLC (4500778461)

Project ID Sealand Soil Sampling GEL ID Client Sample ID Method CAS Analyte Result Q 534641001 C-21-a-1 SW846 8260D 127-18-4 Tetrachloroethylene 0.00226 mg/kg 534641002 C-21-a-2 SW846 8260D 127-18-4 Tetrachloroethylene 0.00117 mg/kg NOTE: This report only lists detections greater than the reporting level. Reporting level is the LOQ, PQL, MDC, or Client-provided limit.

Page 3 of 17 SDG: 534641

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Certificate of Analysis Report Date: February 16, 2021 Company : Westinghouse Electric Company, LLC Address : PO Drawer R Columbia, South Carolina 29205

Contact:

Ms. Cynthia Teague Project: Sealand Soil Sampling Client Sample ID: C-21-a-1 Project: WNUCSealand Sample ID: 534641001 Client ID: WNUC009 Matrix: Soil Collect Date: 08-FEB-21 13:30 Receive Date: 10-FEB-21 Collector: Client Moisture: 11.7%

Parameter Qualifier Result DL RL Units PF DF Analyst Date Time Batch Method Volatile Organics Totals Tetrachloroethylene VOA only "Dry Weight Corrected" Tetrachloroethylene 0.00226 0.000230 0.000690 mg/kg 0.610 1 JP1 02/12/21 0139 2092093 1 The following Prep Methods were performed:

Method Description Analyst Date Time Prep Batch SW846 5035 5035 Prep JP1 02/08/21 1330 2092092 The following Analytical Methods were performed:

Method Description Analyst Comments 1 SW846 8260D Surrogate/Tracer Recovery Test Result Nominal Recovery% Acceptable Limits 1,2-Dichloroethane-d4 Totals Tetrachloroethylene VOA only "Dry Weight 0.0332 mg/kg 0.0500 96 (76%-127%)

Corrected" Bromofluorobenzene Totals Tetrachloroethylene VOA only "Dry Weight 0.0336 mg/kg 0.0500 97 (70%-130%)

Corrected" Toluene-d8 Totals Tetrachloroethylene VOA only "Dry Weight 0.0339 mg/kg 0.0500 98 (81%-120%)

Corrected" 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 17 SDG: 534641

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Certificate of Analysis Report Date: February 16, 2021 Company : Westinghouse Electric Company, LLC Address : PO Drawer R Columbia, South Carolina 29205

Contact:

Ms. Cynthia Teague Project: Sealand Soil Sampling Client Sample ID: C-21-a-2 Project: WNUCSealand Sample ID: 534641002 Client ID: WNUC009 Matrix: Soil Collect Date: 08-FEB-21 13:20 Receive Date: 10-FEB-21 Collector: Client Moisture: 14.6%

Parameter Qualifier Result DL RL Units PF DF Analyst Date Time Batch Method Volatile Organics Totals Tetrachloroethylene VOA only "Dry Weight Corrected" Tetrachloroethylene 0.00117 0.000365 0.00109 mg/kg 0.935 1 JP1 02/12/21 0204 2092093 1 The following Prep Methods were performed:

Method Description Analyst Date Time Prep Batch SW846 5035 5035 Prep JP1 02/08/21 1320 2092092 The following Analytical Methods were performed:

Method Description Analyst Comments 1 SW846 8260D Surrogate/Tracer Recovery Test Result Nominal Recovery% Acceptable Limits 1,2-Dichloroethane-d4 Totals Tetrachloroethylene VOA only "Dry Weight 0.0522 mg/kg 0.0500 95 (76%-127%)

Corrected" Bromofluorobenzene Totals Tetrachloroethylene VOA only "Dry Weight 0.0527 mg/kg 0.0500 96 (70%-130%)

Corrected" Toluene-d8 Totals Tetrachloroethylene VOA only "Dry Weight 0.0540 mg/kg 0.0500 99 (81%-120%)

Corrected" 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 17 SDG: 534641

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Certificate of Analysis Report Date: February 16, 2021 Company : Westinghouse Electric Company, LLC Address : PO Drawer R Columbia, South Carolina 29205

Contact:

Ms. Cynthia Teague Project: Sealand Soil Sampling Client Sample ID: C-21-a-1 Project: WNUCSealand Sample ID: 534641001 Client ID: WNUC009 Matrix: Soil Collect Date: 08-FEB-21 13:30 Receive Date: 10-FEB-21 Collector: Client Moisture: 11.7%

Parameter Qualifier Result Uncertainty MDC RL Units PF DF Analyst Date Time Batch Method 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 6 of 17 SDG: 534641

GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Certificate of Analysis Report Date: February 16, 2021 Company : Westinghouse Electric Company, LLC Address : PO Drawer R Columbia, South Carolina 29205

Contact:

Ms. Cynthia Teague Project: Sealand Soil Sampling Client Sample ID: C-21-a-2 Project: WNUCSealand Sample ID: 534641002 Client ID: WNUC009 Matrix: Soil Collect Date: 08-FEB-21 13:20 Receive Date: 10-FEB-21 Collector: Client Moisture: 14.6%

Parameter Qualifier Result Uncertainty MDC RL Units PF DF Analyst Date Time Batch Method 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 7 of 17 SDG: 534641

GEL LABORATORIES LLC 2040 Savage Road Charleston, SC 29407 - (843) 556-8171 - www.gel.com QC Summary Report Date: February 16, 2021 Westinghouse Electric Company, LLC Page 1 of 3 PO Drawer R Columbia, South Carolina

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Ms. Cynthia Teague Workorder: 534641 Parmname NOM Sample Qual QC Units RPD% REC% Range Anlst Date Time Volatile-GC/MS Batch 2092093 QC1204752977 LCS Tetrachloroethylene 0.0500 0.0521 mg/kg 104 (70%-125%) JP1 02/11/21 18:04

- 1,2-Dichloroethane-d4 50.0 48.0 ug/L 96 (76%-127%)

- Bromofluorobenzene 50.0 46.9 ug/L 94 (70%-130%)

- Toluene-d8 50.0 47.3 ug/L 95 (81%-120%)

QC1204752975 MB Tetrachloroethylene U ND mg/kg 02/11/21 19:45

- 1,2-Dichloroethane-d4 50.0 47.6 ug/L 95 (76%-127%)

- Bromofluorobenzene 50.0 47.4 ug/L 95 (70%-130%)

- Toluene-d8 50.0 47.9 ug/L 96 (81%-120%)

QC1204752978 533811010 PS Tetrachloroethylene 50.0 U ND 45.7 ug/L 91 (46%-134%) 02/12/21 02:29

- 1,2-Dichloroethane-d4 50.0 45.5 48.0 ug/L 96 (76%-127%)

- Bromofluorobenzene 50.0 50.1 51.7 ug/L 103 (70%-130%)

- Toluene-d8 50.0 49.2 51.1 ug/L 102 (81%-120%)

QC1204752979 533811010 PSD Tetrachloroethylene 50.0 U ND 45.2 ug/L 1 90 (0%-20%) 02/12/21 02:54 Page 8 of 17 SDG: 534641

GEL LABORATORIES LLC 2040 Savage Road Charleston, SC 29407 - (843) 556-8171 - www.gel.com QC Summary Workorder: 534641 Page 2 of 3 Parmname NOM Sample Qual QC Units RPD% REC% Range Anlst Date Time Volatile-GC/MS Batch 2092093

- 1,2-Dichloroethane-d4 50.0 45.5 47.7 ug/L 95 (76%-127%) JP1 02/12/21 02:54

- Bromofluorobenzene 50.0 50.1 52.3 ug/L 105 (70%-130%)

- Toluene-d8 50.0 49.2 48.8 ug/L 98 (81%-120%)

Notes:

The Qualifiers in this report are defined as follows:

- Analyte is a surrogate compound

< Result is less than value reported

> Result is greater than value reported A The TIC is a suspected aldol-condensation product B The target analyte was detected in the associated blank.

C Analyte has been confirmed by GC/MS analysis D Results are reported from a diluted aliquot of the sample E 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 JNX Non Calibrated Compound N Organics--Presumptive evidence based on mass spectral library search to make a tentative identification of the analyte (TIC). Quantitation is based on nearest internal standard response factor N Presumptive evidence based on mass spectral library search to make a tentative identification of the analyte (TIC). Quantitation is based on nearest internal standard response factor 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 P Organics--The concentrations between the primary and confirmation columns/detectors is >40% different. For HPLC, the difference is >70%.

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.

UJ Compound cannot be extracted X Consult Case Narrative, Data Summary package, or Project Manager concerning this qualifier Y QC Samples were not spiked with this compound Page 9 of 17 SDG: 534641

GEL LABORATORIES LLC 2040 Savage Road Charleston, SC 29407 - (843) 556-8171 - www.gel.com QC Summary Workorder: 534641 Page 3 of 3 Parmname NOM Sample Qual QC Units RPD% REC% Range Anlst Date Time

^ 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 10 of 17 SDG: 534641

GEL LABORATORIES LLC 2040 Savage Road Charleston, SC 29407 - (843) 556-8171 - www.gel.com QC Summary Report Date: February 16, 2021 Westinghouse Electric Company, LLC Page 1 of 2 PO Drawer R Columbia, South Carolina

Contact:

Ms. Cynthia Teague Workorder: 534641 Parmname NOM Sample Qual QC Units RPD% REC% Range Anlst Date Time Notes:

The Qualifiers in this report are defined as follows:

- Analyte is a Tracer compound