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 Kim Kuhn 2600 Bull Street Columbia, SC 29201 Direct tel: 803.647.1920 Direct fax: 803.695.3964 e-mail: joynerdp@westinghouse.com 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 ID Date Sampled Lab Report #

< or =

Result (mg/kg)

Notes C-21-3 9/10/2020 GEL WO 521515

=

0.005040 Systematic excavation required C-21-6 9/10/2020 GEL WO 521515

=

0.001280 Bias C-21-A 11/5/2020 GEL WO 526713

=

0.005630 Bias excavation required C-21-B 11/5/2020 GEL WO 526713

=

0.000827 Bias C-21-a 1/26/2021 GEL WO 533288

=

0.002420 Bias excavation required C-21-b 1/26/2021 GEL WO 533288 0.000387 Bias C-21-a-1 2/8/2021 GEL WO 534641

=

0.002260 Bias C-21-a-2 2/8/2021 GEL WO 534641

=

0.001170 Bias C-21-a-1-North 2/23/2021 GEL WO 525611 0.000308 bias C-21-a-1-South 2/23/2021 GEL WO 525611 0.000320 Bias 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

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

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.

for Page 2 of 25 SDG: 526713

Analytical Detections Summary Client SDG/Report#

526713 Project ID Westinghouse Electric Co, LLC Sealand Soil Sampling Result GEL ID Client Sample ID Method Q

CAS Analyte 526713001 C-21-A SW846 8260D 0.00563 mg/kg Tetrachloroethylene 127-18-4 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

Certificate of Analysis GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Report Date: November 11, 2020 Parameter Result Units Qualifier Analyst Date Time DF Batch Method RL DL PF Volatile Organics 2060807 1951 mg/kg 11/09/20 JP1 0.000877 1

Ms. Cynthia Teague

Contact:

Westinghouse Electric Company, LLC Company :

PO Drawer R Columbia, South Carolina 29205 Address :

Sealand Soil Sampling Project:

526713001 Soil 05-NOV-20 14:07 06-NOV-20 C-21-A WNUCSealand Project:

WNUC009 Client ID:

Client Sample ID:

Receive Date:

Client Sample ID:

Surrogate/Tracer Recovery Matrix:

Collect Date:

Collector:

Recovery%

Moisture:

Test Acceptable Limits 6.42%

0.000292 1

Tetrachloroethylene Totals Tetrachloroethylene VOA only "Dry Weight Corrected" 0.00563 0.821 1,2-Dichloroethane-d4 Bromofluorobenzene Toluene-d8 Totals Tetrachloroethylene VOA only "Dry Weight Corrected" Totals Tetrachloroethylene VOA only "Dry Weight Corrected" Totals Tetrachloroethylene VOA only "Dry Weight Corrected" 98 98 96 (81%-124%)

(70%-130%)

(81%-120%)

The following Prep Methods were performed:

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

1 Method Description SW846 8260D Analyst Comments Nominal 0.0500 0.0500 0.0500 Result 0.0428 0.0432 0.0420 mg/kg mg/kg mg/kg Notes:

Lc/LC: Critical Level PF: Prep Factor RL: Reporting Limit SQL: Sample Quantitation Limit Column headers are defined as follows:

DF: Dilution Factor DL: Detection Limit MDA: Minimum Detectable Activity MDC: Minimum Detectable Concentration Page 4 of 25 SDG: 526713

Certificate of Analysis GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Report Date: November 11, 2020 Parameter Result Units Qualifier Analyst Date Time DF Batch Method RL DL PF Volatile Organics 2060807 1440 mg/kg 11/10/20 PXY1 0.000889 1

Ms. Cynthia Teague

Contact:

Westinghouse Electric Company, LLC Company :

PO Drawer R Columbia, South Carolina 29205 Address :

Sealand Soil Sampling Project:

526713002 Soil 05-NOV-20 14:15 06-NOV-20 C-21-B WNUCSealand Project:

WNUC009 Client ID:

Client Sample ID:

Receive Date:

Client Sample ID:

Surrogate/Tracer Recovery Matrix:

Collect Date:

Collector:

Recovery%

Moisture:

Test Acceptable Limits 4.98%

0.000296 1

J Tetrachloroethylene Totals Tetrachloroethylene VOA only "Dry Weight Corrected" 0.000827 0.845 1,2-Dichloroethane-d4 Bromofluorobenzene Toluene-d8 Totals Tetrachloroethylene VOA only "Dry Weight Corrected" Totals Tetrachloroethylene VOA only "Dry Weight Corrected" Totals Tetrachloroethylene VOA only "Dry Weight Corrected" 96 99 95 (81%-124%)

(70%-130%)

(81%-120%)

The following Prep Methods were performed:

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

1 Method Description SW846 8260D Analyst Comments Nominal 0.0500 0.0500 0.0500 Result 0.0425 0.0439 0.0424 mg/kg mg/kg mg/kg Notes:

Lc/LC: Critical Level PF: Prep Factor RL: Reporting Limit SQL: Sample Quantitation Limit Column headers are defined as follows:

DF: Dilution Factor DL: Detection Limit MDA: Minimum Detectable Activity MDC: Minimum Detectable Concentration Page 5 of 25 SDG: 526713

Certificate of Analysis GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Report Date: November 11, 2020 Parameter Result Units Qualifier Analyst Date Time DF Batch Method RL DL PF Volatile Organics 2060807 2045 mg/kg 11/09/20 JP1 0.000949 1

Ms. Cynthia Teague

Contact:

Westinghouse Electric Company, LLC Company :

PO Drawer R Columbia, South Carolina 29205 Address :

Sealand Soil Sampling Project:

526713003 Soil 05-NOV-20 14:21 06-NOV-20 C-22-C WNUCSealand Project:

WNUC009 Client ID:

Client Sample ID:

Receive Date:

Client Sample ID:

Surrogate/Tracer Recovery Matrix:

Collect Date:

Collector:

Recovery%

Moisture:

Test Acceptable Limits 7.11%

0.000316 1

U Tetrachloroethylene Totals Tetrachloroethylene VOA only "Dry Weight Corrected" ND 0.882 1,2-Dichloroethane-d4 Bromofluorobenzene Toluene-d8 Totals Tetrachloroethylene VOA only "Dry Weight Corrected" Totals Tetrachloroethylene VOA only "Dry Weight Corrected" Totals Tetrachloroethylene VOA only "Dry Weight Corrected" 94 99 97 (81%-124%)

(70%-130%)

(81%-120%)

The following Prep Methods were performed:

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

1 Method Description SW846 8260D Analyst Comments Nominal 0.0500 0.0500 0.0500 Result 0.0446 0.0472 0.0460 mg/kg mg/kg mg/kg Notes:

Lc/LC: Critical Level PF: Prep Factor RL: Reporting Limit SQL: Sample Quantitation Limit Column headers are defined as follows:

DF: Dilution Factor DL: Detection Limit MDA: Minimum Detectable Activity MDC: Minimum Detectable Concentration Page 6 of 25 SDG: 526713

Certificate of Analysis GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Report Date: November 11, 2020 Parameter Result Units Qualifier Analyst Date Time DF Batch Method RL DL PF Volatile Organics 2060807 2112 mg/kg 11/09/20 JP1 0.00109 1

Ms. Cynthia Teague

Contact:

Westinghouse Electric Company, LLC Company :

PO Drawer R Columbia, South Carolina 29205 Address :

Sealand Soil Sampling Project:

526713004 Soil 05-NOV-20 14:29 06-NOV-20 C-22-D WNUCSealand Project:

WNUC009 Client ID:

Client Sample ID:

Receive Date:

Client Sample ID:

Surrogate/Tracer Recovery Matrix:

Collect Date:

Collector:

Recovery%

Moisture:

Test Acceptable Limits 7.12%

0.000363 1

J Tetrachloroethylene Totals Tetrachloroethylene VOA only "Dry Weight Corrected" 0.000839 1.01 1,2-Dichloroethane-d4 Bromofluorobenzene Toluene-d8 Totals Tetrachloroethylene VOA only "Dry Weight Corrected" Totals Tetrachloroethylene VOA only "Dry Weight Corrected" Totals Tetrachloroethylene VOA only "Dry Weight Corrected" 94 98 97 (81%-124%)

(70%-130%)

(81%-120%)

The following Prep Methods were performed:

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

1 Method Description SW846 8260D Analyst Comments Nominal 0.0500 0.0500 0.0500 Result 0.0510 0.0533 0.0530 mg/kg mg/kg mg/kg Notes:

Lc/LC: Critical Level PF: Prep Factor RL: Reporting Limit SQL: Sample Quantitation Limit Column headers are defined as follows:

DF: Dilution Factor DL: Detection Limit MDA: Minimum Detectable Activity MDC: Minimum Detectable Concentration Page 7 of 25 SDG: 526713

Certificate of Analysis GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Report Date: November 11, 2020 Parameter Result Units Qualifier Analyst Date Time DF Batch Method RL DL PF Volatile Organics 2060807 2138 mg/kg 11/09/20 JP1 0.000819 1

Ms. Cynthia Teague

Contact:

Westinghouse Electric Company, LLC Company :

PO Drawer R Columbia, South Carolina 29205 Address :

Sealand Soil Sampling Project:

526713005 Soil 05-NOV-20 14:38 06-NOV-20 C-23-E WNUCSealand Project:

WNUC009 Client ID:

Client Sample ID:

Receive Date:

Client Sample ID:

Surrogate/Tracer Recovery Matrix:

Collect Date:

Collector:

Recovery%

Moisture:

Test Acceptable Limits 6.21%

0.000273 1

U Tetrachloroethylene Totals Tetrachloroethylene VOA only "Dry Weight Corrected" ND 0.768 1,2-Dichloroethane-d4 Bromofluorobenzene Toluene-d8 Totals Tetrachloroethylene VOA only "Dry Weight Corrected" Totals Tetrachloroethylene VOA only "Dry Weight Corrected" Totals Tetrachloroethylene VOA only "Dry Weight Corrected" 98 97 94 (81%-124%)

(70%-130%)

(81%-120%)

The following Prep Methods were performed:

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

1 Method Description SW846 8260D Analyst Comments Nominal 0.0500 0.0500 0.0500 Result 0.0403 0.0397 0.0385 mg/kg mg/kg mg/kg Notes:

Lc/LC: Critical Level PF: Prep Factor RL: Reporting Limit SQL: Sample Quantitation Limit Column headers are defined as follows:

DF: Dilution Factor DL: Detection Limit MDA: Minimum Detectable Activity MDC: Minimum Detectable Concentration Page 8 of 25 SDG: 526713

Certificate of Analysis GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Report Date: November 11, 2020 Parameter Result Units Qualifier Analyst Date Time DF Batch Method RL DL PF Volatile Organics 2060807 2205 mg/kg 11/09/20 JP1 0.000901 1

Ms. Cynthia Teague

Contact:

Westinghouse Electric Company, LLC Company :

PO Drawer R Columbia, South Carolina 29205 Address :

Sealand Soil Sampling Project:

526713006 Soil 05-NOV-20 14:45 06-NOV-20 C-23-F WNUCSealand Project:

WNUC009 Client ID:

Client Sample ID:

Receive Date:

Client Sample ID:

Surrogate/Tracer Recovery Matrix:

Collect Date:

Collector:

Recovery%

Moisture:

Test Acceptable Limits 8.16%

0.000300 1

U Tetrachloroethylene Totals Tetrachloroethylene VOA only "Dry Weight Corrected" ND 0.828 1,2-Dichloroethane-d4 Bromofluorobenzene Toluene-d8 Totals Tetrachloroethylene VOA only "Dry Weight Corrected" Totals Tetrachloroethylene VOA only "Dry Weight Corrected" Totals Tetrachloroethylene VOA only "Dry Weight Corrected" 93 96 96 (81%-124%)

(70%-130%)

(81%-120%)

The following Prep Methods were performed:

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

1 Method Description SW846 8260D Analyst Comments Nominal 0.0500 0.0500 0.0500 Result 0.0421 0.0433 0.0432 mg/kg mg/kg mg/kg Notes:

Lc/LC: Critical Level PF: Prep Factor RL: Reporting Limit SQL: Sample Quantitation Limit Column headers are defined as follows:

DF: Dilution Factor DL: Detection Limit MDA: Minimum Detectable Activity MDC: Minimum Detectable Concentration Page 9 of 25 SDG: 526713

Certificate of Analysis GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Report Date: November 11, 2020 Parameter Result Units Qualifier Analyst Date Time DF Batch Method RL MDC PF Ms. Cynthia Teague

Contact:

Westinghouse Electric Company, LLC Company :

PO Drawer R Columbia, South Carolina 29205 Address :

Sealand Soil Sampling Project:

526713001 Soil 05-NOV-20 14:07 06-NOV-20 C-21-A WNUCSealand Project:

WNUC009 Client ID:

Client Sample ID:

Receive Date:

Client Sample ID:

Matrix:

Collect Date:

Collector:

Moisture:

6.42%

Uncertainty Notes:

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

Lc/LC: Critical Level PF: Prep Factor RL: Reporting Limit SQL: Sample Quantitation Limit Column headers are defined as follows:

DF: Dilution Factor DL: Detection Limit MDA: Minimum Detectable Activity MDC: Minimum Detectable Concentration Page 10 of 25 SDG: 526713

Certificate of Analysis GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Report Date: November 11, 2020 Parameter Result Units Qualifier Analyst Date Time DF Batch Method RL MDC PF Ms. Cynthia Teague

Contact:

Westinghouse Electric Company, LLC Company :

PO Drawer R Columbia, South Carolina 29205 Address :

Sealand Soil Sampling Project:

526713002 Soil 05-NOV-20 14:15 06-NOV-20 C-21-B WNUCSealand Project:

WNUC009 Client ID:

Client Sample ID:

Receive Date:

Client Sample ID:

Matrix:

Collect Date:

Collector:

Moisture:

4.98%

Uncertainty Notes:

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

Lc/LC: Critical Level PF: Prep Factor RL: Reporting Limit SQL: Sample Quantitation Limit Column headers are defined as follows:

DF: Dilution Factor DL: Detection Limit MDA: Minimum Detectable Activity MDC: Minimum Detectable Concentration Page 11 of 25 SDG: 526713

Certificate of Analysis GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Report Date: November 11, 2020 Parameter Result Units Qualifier Analyst Date Time DF Batch Method RL MDC PF Ms. Cynthia Teague

Contact:

Westinghouse Electric Company, LLC Company :

PO Drawer R Columbia, South Carolina 29205 Address :

Sealand Soil Sampling Project:

526713003 Soil 05-NOV-20 14:21 06-NOV-20 C-22-C WNUCSealand Project:

WNUC009 Client ID:

Client Sample ID:

Receive Date:

Client Sample ID:

Matrix:

Collect Date:

Collector:

Moisture:

7.11%

Uncertainty Notes:

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

Lc/LC: Critical Level PF: Prep Factor RL: Reporting Limit SQL: Sample Quantitation Limit Column headers are defined as follows:

DF: Dilution Factor DL: Detection Limit MDA: Minimum Detectable Activity MDC: Minimum Detectable Concentration Page 12 of 25 SDG: 526713

Certificate of Analysis GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Report Date: November 11, 2020 Parameter Result Units Qualifier Analyst Date Time DF Batch Method RL MDC PF Ms. Cynthia Teague

Contact:

Westinghouse Electric Company, LLC Company :

PO Drawer R Columbia, South Carolina 29205 Address :

Sealand Soil Sampling Project:

526713004 Soil 05-NOV-20 14:29 06-NOV-20 C-22-D WNUCSealand Project:

WNUC009 Client ID:

Client Sample ID:

Receive Date:

Client Sample ID:

Matrix:

Collect Date:

Collector:

Moisture:

7.12%

Uncertainty Notes:

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

Lc/LC: Critical Level PF: Prep Factor RL: Reporting Limit SQL: Sample Quantitation Limit Column headers are defined as follows:

DF: Dilution Factor DL: Detection Limit MDA: Minimum Detectable Activity MDC: Minimum Detectable Concentration Page 13 of 25 SDG: 526713

Certificate of Analysis GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Report Date: November 11, 2020 Parameter Result Units Qualifier Analyst Date Time DF Batch Method RL MDC PF Ms. Cynthia Teague

Contact:

Westinghouse Electric Company, LLC Company :

PO Drawer R Columbia, South Carolina 29205 Address :

Sealand Soil Sampling Project:

526713005 Soil 05-NOV-20 14:38 06-NOV-20 C-23-E WNUCSealand Project:

WNUC009 Client ID:

Client Sample ID:

Receive Date:

Client Sample ID:

Matrix:

Collect Date:

Collector:

Moisture:

6.21%

Uncertainty Notes:

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

Lc/LC: Critical Level PF: Prep Factor RL: Reporting Limit SQL: Sample Quantitation Limit Column headers are defined as follows:

DF: Dilution Factor DL: Detection Limit MDA: Minimum Detectable Activity MDC: Minimum Detectable Concentration Page 14 of 25 SDG: 526713

Certificate of Analysis GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Report Date: November 11, 2020 Parameter Result Units Qualifier Analyst Date Time DF Batch Method RL MDC PF Ms. Cynthia Teague

Contact:

Westinghouse Electric Company, LLC Company :

PO Drawer R Columbia, South Carolina 29205 Address :

Sealand Soil Sampling Project:

526713006 Soil 05-NOV-20 14:45 06-NOV-20 C-23-F WNUCSealand Project:

WNUC009 Client ID:

Client Sample ID:

Receive Date:

Client Sample ID:

Matrix:

Collect Date:

Collector:

Moisture:

8.16%

Uncertainty Notes:

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

Lc/LC: Critical Level PF: Prep Factor RL: Reporting Limit SQL: Sample Quantitation Limit Column headers are defined as follows:

DF: Dilution Factor DL: Detection Limit MDA: Minimum Detectable Activity MDC: Minimum Detectable Concentration Page 15 of 25 SDG: 526713

QC Summary GEL LABORATORIES LLC 2040 Savage Road Charleston, SC 29407 - (843) 556-8171 - www.gel.com Volatile-GC/MS 2060807 Batch Tetrachloroethylene 1,2-Dichloroethane-d4 Bromofluorobenzene Toluene-d8 Tetrachloroethylene 1,2-Dichloroethane-d4 Bromofluorobenzene Toluene-d8 Tetrachloroethylene 1,2-Dichloroethane-d4 Bromofluorobenzene Toluene-d8 Tetrachloroethylene Parmname Ms. Cynthia Teague

Contact:

Westinghouse Electric Company, LLC PO Drawer R Columbia, South Carolina November 11, 2020 Report Date:

Units mg/kg ug/L ug/L ug/L mg/kg ug/L ug/L ug/L mg/kg ug/L ug/L ug/L mg/kg Anlst Date Time JP1 PXY1 JP1 11/09/20 16:44 11/10/20 11:33 11/09/20 17:11 11/09/20 18:58 QC 0.0462 52.8 48.7 47.8 0.0543 50.4 49.4 48.7 0.0449 50.5 48.1 47.7 ND NOM Sample Range (68%-129%)

(81%-124%)

(70%-130%)

(81%-120%)

(68%-129%)

(81%-124%)

(70%-130%)

(81%-120%)

(0%-20%)

(81%-124%)

(70%-130%)

(81%-120%)

Qual U

QC1204690065 QC1204691060 QC1204690066 QC1204690064 3

REC%

92 106 97 96 109 101 99 97 90 101 96 95 0.0500 50.0 50.0 50.0 0.0500 50.0 50.0 50.0 0.0500 50.0 50.0 50.0 LCS LCS LCSD MB 526713 Workorder:

RPD%

Page 1 of 3 Page 16 of 25 SDG: 526713

QC Summary GEL LABORATORIES LLC 2040 Savage Road Charleston, SC 29407 - (843) 556-8171 - www.gel.com Volatile-GC/MS 2060807 Batch 1,2-Dichloroethane-d4 Bromofluorobenzene Toluene-d8 Tetrachloroethylene 1,2-Dichloroethane-d4 Bromofluorobenzene Toluene-d8 Parmname Units ug/L ug/L ug/L mg/kg ug/L ug/L ug/L Anlst Date Time JP1 PXY1 11/09/20 18:58 11/10/20 13:20 QC 49.7 49.3 48.6 ND 50.2 49.6 49.3 NOM Sample Range (81%-124%)

(70%-130%)

(81%-120%)

(81%-124%)

(70%-130%)

(81%-120%)

Qual U

QC1204691059 The Qualifiers in this report are defined as follows:

REC%

99 99 97 100 99 99 50.0 50.0 50.0 50.0 50.0 50.0 MB 526713 Workorder:

A B

C D

E H

J J

JNX N

N N/A Analyte is a surrogate compound Result is less than value reported Result is greater than value reported The TIC is a suspected aldol-condensation product The target analyte was detected in the associated blank.

Analyte has been confirmed by GC/MS analysis Results are reported from a diluted aliquot of the sample Concentration of the target analyte exceeds the instrument calibration range Analytical holding time was exceeded See case narrative for an explanation Value is estimated Non Calibrated Compound 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 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 RPD or %Recovery limits do not apply.

RPD%

Notes:

Page 2 of 3 Page 17 of 25 SDG: 526713

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

526713 Workorder:

N1 ND NJ P

Q R

U UJ X

Y

^

h See case narrative Analyte concentration is not detected above the detection limit Consult Case Narrative, Data Summary package, or Project Manager concerning this qualifier Organics--The concentrations between the primary and confirmation columns/detectors is >40% different. For HPLC, the difference is >70%.

One or more quality control criteria have not been met. Refer to the applicable narrative or DER.

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

Compound cannot be extracted Consult Case Narrative, Data Summary package, or Project Manager concerning this qualifier 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.

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.

RPD%

Page 18 of 25 SDG: 526713

QC Summary GEL LABORATORIES LLC 2040 Savage Road Charleston, SC 29407 - (843) 556-8171 - www.gel.com Parmname Ms. Cynthia Teague

Contact:

Westinghouse Electric Company, LLC PO Drawer R Columbia, South Carolina November 11, 2020 Report Date:

Units Anlst Date Time QC NOM Sample Range Qual The Qualifiers in this report are defined as follows:

REC%

526713 Workorder:

BD FA H

J J

K L

M M

N/A N1 ND NJ Q

R U

UI UJ UL X

Y

^

h Analyte is a Tracer compound Result is less than value reported Result is greater than value reported Results are either below the MDC or tracer recovery is low Failed analysis.

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

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

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

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

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

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

Consult Case Narrative, Data Summary package, or Project Manager concerning this qualifier 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.

Preparation or preservation holding time was exceeded RPD%

Notes:

Page 1 of 2 Page 19 of 25 SDG: 526713

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

526713 Workorder:

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.

RPD%

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

State Certification Alabama Alaska Alaska Drinking Water Arkansas CLIA California Colorado Connecticut DoD ELAP/ ISO17025 A2LA Florida NELAP Foreign Soils Permit Georgia Georgia SDWA Hawaii Idaho Illinois NELAP Indiana Kansas NELAP Kentucky SDWA Kentucky Wastewater Louisiana Drinking Water Louisiana NELAP Maine Maryland Massachusetts Massachusetts PFAS Approv Michigan Mississippi Nebraska Nevada New Hampshire NELAP New Jersey NELAP New Mexico New York NELAP North Carolina North Carolina SDWA North Dakota Oklahoma Pennsylvania NELAP Puerto Rico S. Carolina Radiochem Sanitation Districts of L South Carolina Chemistry Tennessee Texas NELAP Utah NELAP Vermont Virginia NELAP Washington 42200 17018 SC00012 880651 42D0904046 2940 SC00012 PH0169 2567.01 E87156 P3301500283, P3301500253 SC00012 967 SC00012 SC00012 200029 CSC01 E10332 90129 90129 LA024 03046 (AI33904) 2019020 270 MSC012 Letter 9976 SC00012 NEOS2613 SC0001220211 2054 SC002 SC00012 11501 233 45709 R158 2019165 6800485 SC00012 10120002 9255651 10120001 TN 02934 T1047042352017 SC00012202033 VT87156 460202 C780 List of current GEL Certifications as of 11 November 2020 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, PM_SIGN_HERE Lindsay Fabra Project Manager Purchase Order: PO 4500778461 Enclosures Page 1 of 12 SDG: 533288 Samuel Hogan for

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

Client SDG: 533288 GEL Work Order: 533288 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.

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.

for Page 2 of 12 SDG: 533288

Certificate of Analysis GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Report Date: February 3, 2021 Parameter Result Units Qualifier Analyst Date Time DF Batch Method RL DL PF Volatile Organics 2087144 1531 mg/kg 02/02/21 PXY1 0.000896 1

Ms. Cynthia Teague

Contact:

Westinghouse Electric Company, LLC Company :

PO Drawer R Columbia, South Carolina 29205 Address :

Sealand Soil Sampling Project:

533288001 Soil 26-JAN-21 14:55 27-JAN-21 C-21-a WNUCSealand Project:

WNUC009 Client ID:

Client Sample ID:

Receive Date:

Client Sample ID:

Surrogate/Tracer Recovery Matrix:

Collect Date:

Collector:

Recovery%

Moisture:

Test Acceptable Limits 9.66%

0.000298 1

Tetrachloroethylene Totals Tetrachloroethylene VOA only "Dry Weight Corrected" 0.00242 0.809 1,2-Dichloroethane-d4 Bromofluorobenzene Toluene-d8 Totals Tetrachloroethylene VOA only "Dry Weight Corrected" Totals Tetrachloroethylene VOA only "Dry Weight Corrected" Totals Tetrachloroethylene VOA only "Dry Weight Corrected" 101 101 100 (76%-127%)

(70%-130%)

(81%-120%)

The following Prep Methods were performed:

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

1 Method Description SW846 8260D Analyst Comments Nominal 0.0500 0.0500 0.0500 Result 0.0454 0.0453 0.0446 mg/kg mg/kg mg/kg Notes:

Lc/LC: Critical Level PF: Prep Factor RL: Reporting Limit SQL: Sample Quantitation Limit Column headers are defined as follows:

DF: Dilution Factor DL: Detection Limit MDA: Minimum Detectable Activity MDC: Minimum Detectable Concentration Page 3 of 12 SDG: 533288

Certificate of Analysis GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Report Date: February 3, 2021 Parameter Result Units Qualifier Analyst Date Time DF Batch Method RL DL PF Volatile Organics 2087144 2038 mg/kg 01/29/21 PXY1 0.00116 1

Ms. Cynthia Teague

Contact:

Westinghouse Electric Company, LLC Company :

PO Drawer R Columbia, South Carolina 29205 Address :

Sealand Soil Sampling Project:

533288002 Soil 26-JAN-21 15:01 27-JAN-21 C-21-b WNUCSealand Project:

WNUC009 Client ID:

Client Sample ID:

Receive Date:

Client Sample ID:

Surrogate/Tracer Recovery Matrix:

Collect Date:

Collector:

Recovery%

Moisture:

Test Acceptable Limits 12.5%

0.000387 1

U Tetrachloroethylene Totals Tetrachloroethylene VOA only "Dry Weight Corrected" ND 1.02 1,2-Dichloroethane-d4 Bromofluorobenzene Toluene-d8 Totals Tetrachloroethylene VOA only "Dry Weight Corrected" Totals Tetrachloroethylene VOA only "Dry Weight Corrected" Totals Tetrachloroethylene VOA only "Dry Weight Corrected" 100 106 100 (81%-124%)

(70%-130%)

(81%-120%)

The following Prep Methods were performed:

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

1 Method Description SW846 8260D Analyst Comments Nominal 0.0500 0.0500 0.0500 Result 0.0578 0.0618 0.0581 mg/kg mg/kg mg/kg Notes:

Lc/LC: Critical Level PF: Prep Factor RL: Reporting Limit SQL: Sample Quantitation Limit Column headers are defined as follows:

DF: Dilution Factor DL: Detection Limit MDA: Minimum Detectable Activity MDC: Minimum Detectable Concentration Page 4 of 12 SDG: 533288

QC Summary GEL LABORATORIES LLC 2040 Savage Road Charleston, SC 29407 - (843) 556-8171 - www.gel.com Volatile-GC/MS 2087144 Batch Tetrachloroethylene 1,2-Dichloroethane-d4 Bromofluorobenzene Toluene-d8 Tetrachloroethylene 1,2-Dichloroethane-d4 Bromofluorobenzene Toluene-d8 Tetrachloroethylene 1,2-Dichloroethane-d4 Bromofluorobenzene Toluene-d8 Tetrachloroethylene Parmname Ms. Cynthia Teague

Contact:

Westinghouse Electric Company, LLC PO Drawer R Columbia, South Carolina February 3, 2021 Report Date:

Units mg/kg ug/L ug/L ug/L mg/kg ug/L ug/L ug/L mg/kg ug/L ug/L ug/L mg/kg Anlst Date Time PXY1 01/29/21 10:28 02/02/21 10:04 01/29/21 10:56 01/29/21 13:22 QC 0.0453 53.5 54.0 52.0 0.0469 50.7 50.3 50.4 0.0459 52.0 52.0 50.9 ND NOM Sample Range (68%-129%)

(81%-124%)

(70%-130%)

(81%-120%)

(70%-125%)

(76%-127%)

(70%-130%)

(81%-120%)

(0%-20%)

(81%-124%)

(70%-130%)

(81%-120%)

Qual U

QC1204743513 QC1204745019 QC1204743514 QC1204743512 1

REC%

91 107 108 104 94 101 101 101 92 104 104 102 0.0500 50.0 50.0 50.0 0.0500 50.0 50.0 50.0 0.0500 50.0 50.0 50.0 LCS LCS LCSD MB 533288 Workorder:

RPD%

Page 1 of 3 Page 5 of 12 SDG: 533288

QC Summary GEL LABORATORIES LLC 2040 Savage Road Charleston, SC 29407 - (843) 556-8171 - www.gel.com Volatile-GC/MS 2087144 Batch 1,2-Dichloroethane-d4 Bromofluorobenzene Toluene-d8 Tetrachloroethylene 1,2-Dichloroethane-d4 Bromofluorobenzene Toluene-d8 Parmname Units ug/L ug/L ug/L mg/kg ug/L ug/L ug/L Anlst Date Time PXY1 01/29/21 13:22 02/02/21 12:32 QC 51.2 51.9 51.4 ND 50.2 50.4 50.7 NOM Sample Range (81%-124%)

(70%-130%)

(81%-120%)

(76%-127%)

(70%-130%)

(81%-120%)

Qual U

QC1204745018 The Qualifiers in this report are defined as follows:

REC%

102 104 103 100 101 101 50.0 50.0 50.0 50.0 50.0 50.0 MB 533288 Workorder:

A B

C D

E H

J J

JNX N

N N/A Analyte is a surrogate compound Result is less than value reported Result is greater than value reported The TIC is a suspected aldol-condensation product The target analyte was detected in the associated blank.

Analyte has been confirmed by GC/MS analysis Results are reported from a diluted aliquot of the sample Concentration of the target analyte exceeds the instrument calibration range Analytical holding time was exceeded See case narrative for an explanation Value is estimated Non Calibrated Compound 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 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 RPD or %Recovery limits do not apply.

RPD%

Notes:

Page 2 of 3 Page 6 of 12 SDG: 533288

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

533288 Workorder:

N1 ND NJ P

Q R

U UJ X

Y

^

h See case narrative Analyte concentration is not detected above the detection limit Consult Case Narrative, Data Summary package, or Project Manager concerning this qualifier Organics--The concentrations between the primary and confirmation columns/detectors is >40% different. For HPLC, the difference is >70%.

One or more quality control criteria have not been met. Refer to the applicable narrative or DER.

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

Compound cannot be extracted Consult Case Narrative, Data Summary package, or Project Manager concerning this qualifier 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.

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.

RPD%

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

State Certification Alabama Alaska Alaska Drinking Water Arkansas CLIA California Colorado Connecticut DoD ELAP/ ISO17025 A2LA Florida NELAP Foreign Soils Permit Georgia Georgia SDWA Hawaii Idaho Illinois NELAP Indiana Kansas NELAP Kentucky SDWA Kentucky Wastewater Louisiana Drinking Water Louisiana NELAP Maine Maryland Massachusetts Massachusetts PFAS Approv Michigan Mississippi Nebraska Nevada New Hampshire NELAP New Jersey NELAP New Mexico New York NELAP North Carolina North Carolina SDWA North Dakota Oklahoma Pennsylvania NELAP Puerto Rico S. Carolina Radiochem Sanitation Districts of L South Carolina Chemistry Tennessee Texas NELAP Utah NELAP Vermont Virginia NELAP Washington 42200 17018 SC00012 880651 42D0904046 2940 SC00012 PH0169 2567.01 E87156 P3301500283, P3301500253 SC00012 967 SC00012 SC00012 200029 CSC01 E10332 90129 90129 LA024 03046 (AI33904) 2019020 270 MSC012 Letter 9976 SC00012 NEOS2613 SC0001220211 2054 SC002 SC00012 11501 233 45709 R158 2019165 6800485 SC00012 10120002 9255651 10120001 TN 02934 T1047042352118 SC00012202034 VT87156 460202 C780 List of current GEL Certifications as of 03 February 2021 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

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

Client SDG: 534641 GEL Work Order: 534641 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.

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.

for Page 2 of 17 SDG: 534641

Analytical Detections Summary Client SDG/Report#

534641 Project ID Westinghouse Electric Co, LLC (4500778461)

Sealand Soil Sampling Result GEL ID Client Sample ID Method Q

CAS Analyte 534641001 C-21-a-1 SW846 8260D 0.00226 mg/kg Tetrachloroethylene 127-18-4 534641002 C-21-a-2 SW846 8260D 0.00117 mg/kg Tetrachloroethylene 127-18-4 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

Certificate of Analysis GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Report Date: February 16, 2021 Parameter Result Units Qualifier Analyst Date Time DF Batch Method RL DL PF Volatile Organics 2092093 0139 mg/kg 02/12/21 JP1 0.000690 1

Ms. Cynthia Teague

Contact:

Westinghouse Electric Company, LLC Company :

PO Drawer R Columbia, South Carolina 29205 Address :

Sealand Soil Sampling Project:

534641001 Soil 08-FEB-21 13:30 10-FEB-21 C-21-a-1 WNUCSealand Project:

WNUC009 Client ID:

Client Sample ID:

Receive Date:

Client Sample ID:

Surrogate/Tracer Recovery Matrix:

Collect Date:

Collector:

Recovery%

Moisture:

Test Acceptable Limits 11.7%

0.000230 1

Tetrachloroethylene Totals Tetrachloroethylene VOA only "Dry Weight Corrected" 0.00226 0.610 1,2-Dichloroethane-d4 Bromofluorobenzene Toluene-d8 Totals Tetrachloroethylene VOA only "Dry Weight Corrected" Totals Tetrachloroethylene VOA only "Dry Weight Corrected" Totals Tetrachloroethylene VOA only "Dry Weight Corrected" 96 97 98 (76%-127%)

(70%-130%)

(81%-120%)

The following Prep Methods were performed:

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

1 Method Description SW846 8260D Analyst Comments Nominal 0.0500 0.0500 0.0500 Result 0.0332 0.0336 0.0339 mg/kg mg/kg mg/kg Notes:

Lc/LC: Critical Level PF: Prep Factor RL: Reporting Limit SQL: Sample Quantitation Limit Column headers are defined as follows:

DF: Dilution Factor DL: Detection Limit MDA: Minimum Detectable Activity MDC: Minimum Detectable Concentration Page 4 of 17 SDG: 534641

Certificate of Analysis GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Report Date: February 16, 2021 Parameter Result Units Qualifier Analyst Date Time DF Batch Method RL DL PF Volatile Organics 2092093 0204 mg/kg 02/12/21 JP1 0.00109 1

Ms. Cynthia Teague

Contact:

Westinghouse Electric Company, LLC Company :

PO Drawer R Columbia, South Carolina 29205 Address :

Sealand Soil Sampling Project:

534641002 Soil 08-FEB-21 13:20 10-FEB-21 C-21-a-2 WNUCSealand Project:

WNUC009 Client ID:

Client Sample ID:

Receive Date:

Client Sample ID:

Surrogate/Tracer Recovery Matrix:

Collect Date:

Collector:

Recovery%

Moisture:

Test Acceptable Limits 14.6%

0.000365 1

Tetrachloroethylene Totals Tetrachloroethylene VOA only "Dry Weight Corrected" 0.00117 0.935 1,2-Dichloroethane-d4 Bromofluorobenzene Toluene-d8 Totals Tetrachloroethylene VOA only "Dry Weight Corrected" Totals Tetrachloroethylene VOA only "Dry Weight Corrected" Totals Tetrachloroethylene VOA only "Dry Weight Corrected" 95 96 99 (76%-127%)

(70%-130%)

(81%-120%)

The following Prep Methods were performed:

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

1 Method Description SW846 8260D Analyst Comments Nominal 0.0500 0.0500 0.0500 Result 0.0522 0.0527 0.0540 mg/kg mg/kg mg/kg Notes:

Lc/LC: Critical Level PF: Prep Factor RL: Reporting Limit SQL: Sample Quantitation Limit Column headers are defined as follows:

DF: Dilution Factor DL: Detection Limit MDA: Minimum Detectable Activity MDC: Minimum Detectable Concentration Page 5 of 17 SDG: 534641

Certificate of Analysis GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Report Date: February 16, 2021 Parameter Result Units Qualifier Analyst Date Time DF Batch Method RL MDC PF Ms. Cynthia Teague

Contact:

Westinghouse Electric Company, LLC Company :

PO Drawer R Columbia, South Carolina 29205 Address :

Sealand Soil Sampling Project:

534641001 Soil 08-FEB-21 13:30 10-FEB-21 C-21-a-1 WNUCSealand Project:

WNUC009 Client ID:

Client Sample ID:

Receive Date:

Client Sample ID:

Matrix:

Collect Date:

Collector:

Moisture:

11.7%

Uncertainty Notes:

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

Lc/LC: Critical Level PF: Prep Factor RL: Reporting Limit SQL: Sample Quantitation Limit Column headers are defined as follows:

DF: Dilution Factor DL: Detection Limit MDA: Minimum Detectable Activity MDC: Minimum Detectable Concentration Page 6 of 17 SDG: 534641

Certificate of Analysis GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407 - (843) 556-8171 - www.gel.com Report Date: February 16, 2021 Parameter Result Units Qualifier Analyst Date Time DF Batch Method RL MDC PF Ms. Cynthia Teague

Contact:

Westinghouse Electric Company, LLC Company :

PO Drawer R Columbia, South Carolina 29205 Address :

Sealand Soil Sampling Project:

534641002 Soil 08-FEB-21 13:20 10-FEB-21 C-21-a-2 WNUCSealand Project:

WNUC009 Client ID:

Client Sample ID:

Receive Date:

Client Sample ID:

Matrix:

Collect Date:

Collector:

Moisture:

14.6%

Uncertainty Notes:

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

Lc/LC: Critical Level PF: Prep Factor RL: Reporting Limit SQL: Sample Quantitation Limit Column headers are defined as follows:

DF: Dilution Factor DL: Detection Limit MDA: Minimum Detectable Activity MDC: Minimum Detectable Concentration Page 7 of 17 SDG: 534641

QC Summary GEL LABORATORIES LLC 2040 Savage Road Charleston, SC 29407 - (843) 556-8171 - www.gel.com Volatile-GC/MS 2092093 Batch Tetrachloroethylene 1,2-Dichloroethane-d4 Bromofluorobenzene Toluene-d8 Tetrachloroethylene 1,2-Dichloroethane-d4 Bromofluorobenzene Toluene-d8 Tetrachloroethylene 1,2-Dichloroethane-d4 Bromofluorobenzene Toluene-d8 Tetrachloroethylene Parmname Ms. Cynthia Teague

Contact:

Westinghouse Electric Company, LLC PO Drawer R Columbia, South Carolina February 16, 2021 Report Date:

Units mg/kg ug/L ug/L ug/L mg/kg ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L Anlst Date Time JP1 02/11/21 18:04 02/11/21 19:45 02/12/21 02:29 02/12/21 02:54 QC 0.0521 48.0 46.9 47.3 ND 47.6 47.4 47.9 45.7 48.0 51.7 51.1 45.2 NOM Sample ND 45.5 50.1 49.2 ND Range (70%-125%)

(76%-127%)

(70%-130%)

(81%-120%)

(76%-127%)

(70%-130%)

(81%-120%)

(46%-134%)

(76%-127%)

(70%-130%)

(81%-120%)

(0%-20%)

Qual U

QC1204752977 QC1204752975 QC1204752978 533811010 QC1204752979 533811010 1

REC%

104 96 94 95 95 95 96 91 96 103 102 90 0.0500 50.0 50.0 50.0 50.0 50.0 50.0 50.0 50.0 50.0 50.0 50.0 LCS MB PS PSD 534641 Workorder:

U U

RPD%

Page 1 of 3 Page 8 of 17 SDG: 534641

QC Summary GEL LABORATORIES LLC 2040 Savage Road Charleston, SC 29407 - (843) 556-8171 - www.gel.com Volatile-GC/MS 2092093 Batch 1,2-Dichloroethane-d4 Bromofluorobenzene Toluene-d8 Parmname Units ug/L ug/L ug/L Anlst Date Time JP1 02/12/21 02:54 QC 47.7 52.3 48.8 NOM Sample 45.5 50.1 49.2 Range (76%-127%)

(70%-130%)

(81%-120%)

Qual The Qualifiers in this report are defined as follows:

REC%

95 105 98 50.0 50.0 50.0 534641 Workorder:

A B

C D

E H

J J

JNX N

N N/A N1 ND NJ P

Q R

U UJ X

Y Analyte is a surrogate compound Result is less than value reported Result is greater than value reported The TIC is a suspected aldol-condensation product The target analyte was detected in the associated blank.

Analyte has been confirmed by GC/MS analysis Results are reported from a diluted aliquot of the sample Concentration of the target analyte exceeds the instrument calibration range Analytical holding time was exceeded See case narrative for an explanation Value is estimated Non Calibrated Compound 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 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 RPD or %Recovery limits do not apply.

See case narrative Analyte concentration is not detected above the detection limit Consult Case Narrative, Data Summary package, or Project Manager concerning this qualifier Organics--The concentrations between the primary and confirmation columns/detectors is >40% different. For HPLC, the difference is >70%.

One or more quality control criteria have not been met. Refer to the applicable narrative or DER.

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

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

Notes:

Page 2 of 3 Page 9 of 17 SDG: 534641

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

534641 Workorder:

^

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

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.

RPD%

Page 10 of 17 SDG: 534641