Text

Annual Radiological Environmental Operating Report - PLA-7859
	ML20105A333
Person / Time
Site:	Susquehanna
Issue date:	04/14/2020
From:	Cimorelli K; Susquehanna, Talen Energy
To:	; Document Control Desk, Office of Nuclear Reactor Regulation
References
	PLA-7859
	Download: ML20105A333 (105)
	v • d • e

Kevin Cimorelli Susquehanna Nuclear, LLC Site Vice President 769 Salem Boulevard Berwick, PA 18603 TALEN~

Tel. 570.542.3795 Fax 570.542.1504 Kevin. Cimorelli@TalenEnergy .com ENERGY April 14, 2020 U.S. Nuclear Regulatory Commission 10 CFR 50.4 Attn: Document Control Desk Washington, DC 20555-0001 SUSQUEHANNA STEAM ELECTRIC STATION ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT Docket No. 50-387 PLA-7859 50-388 In accordance with the Susquehanna Steam Electric Station (SSES) Units 1 and 2 Technical Specification 5.6.2, the SSES Annual Radiological Environmental Operating Report is hereby submitted for the 2019 calendar year.

There are no new or revised regulatory commitments contained in this submittal.

If you have any questions regarding this report, please contact Ms. Melisa Krick, Manager- Nuclear Regulatory Affairs, at (570) 542-1818.

Kevin Cimorelli

Attachment:

2019 Annual Radiological Environmental Operating Report Copy: NRC Region I Ms. S. Goetz, NRC Project Manager Ms. L. H. Micewski, NRC Sr. Resident Inspector Mr. M. Shields, PADEP/BRP Mr. R. Rolph, NRC Region 1

Attachment to PLA-7859 2019 Annual Radiological Environmental Operating Report

SUSQUEHANNA STEAM ELECTRIC STATION UNITS 1 and 2 Annual Radiological Environmental Operating Report 2019 Prepared by:

7~c~~

F.J. Hickey, Sr. Heal Physicist Reviewed by:

l(.M. Ervin, Sr. Environmental Scientist Approved by:

(. .UL*

Susquehanna Nuclear, LLC 769 Salem Boulevard Berwick, Pennsylvania 18603

SUSQUEHANNA STEAM ELECTRIC STATION Units 1 & 2 2019 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT JANUARY 1 TO DECEMBER 31, 2019 Susquehanna Nuclear, LLC Berwick, PA April, 2020

TABLE OF CONTENTS I. Summary .......................................................................................................................... 1 II. The Radiological Environmental Monitoring Program..................................................... 5 A. Objectives of the Operational REMP ................................................................... 6 B. Implementation of the Objectives ........................................................................ 6 III. Program Description ...................................................................................................... 8 A. Data Interpretation ............................................................................................... 8 B. Program Exceptions .......................................................................................... 10 C. Program Changes ............................................................................................. 10 D. Quality Assurance Program .............................................................................. 17 E. Summary of Results - Inter-Laboratory Comparison Program ......................... 17 IV. Results and Discussion ............................................................................................... 22 A. Atmospheric....................................................................................................... 22

1. Air Particulates ........................................................................................ 22

2. Air Iodine ................................................................................................. 23 B. Direct Radiation ................................................................................................. 24 C. Terrestrial .......................................................................................................... 25

1. Milk.......................................................................................................... 25

2. Groundwater ........................................................................................... 26

3. Drinking Water ........................................................................................ 28

4. Food Products......................................................................................... 28 D. Aquatic .............................................................................................................. 30

1. Surface Water ......................................................................................... 30

2. Fish ......................................................................................................... 31

3. Shoreline Sediment................................................................................. 32 E. Land Use Census .............................................................................................. 34 V. Annotations to Previous AREOR .................................................................................. 35 VI. Conclusions ................................................................................................................. 35 VII. References ................................................................................................................. 36

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TABLE OF CONTENTS (contd)

Appendix A - Program Summary ..................................................................................... A-1 Appendix B - Sample Designation and Locations ............................................................ B-1 Appendix C - Data Tables ............................................................................................... C-1 Appendix D - Summary of Results from Analytics, Environmental Resource Associates (ERA) and Department of Energy (DOE) - Mixed Analyte Performance Evaluation Program (MAPEP)................................. D-1 Appendix E - REMP Sample Equipment Operability Trending ....................................... E-1

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LIST OF TABLES Exceptions Table................................................................................................................ 11 Appendix A Tables Table A Summary of Data for SSES ........................................................................ A-2 Appendix B Tables Table B-1 Sampling Locations .................................................................................... B-3 Table B-2 Susquehanna Steam Electric Station Radiological Environmental Monitoring Program .................................................................................... B-8 Appendix C Tables Table C-1 Gross Beta Analyses of Air Particulate Filters Susquehanna Steam Electric Station ......................................................................................... C-2 Table C-2 Gamma Spectroscopic Analyses of Composited Air Particulate Filters Susquehanna Steam Electric Station ....................................................... C-4 Table C-3 Iodine-131 Analyses of Air Iodine Samples Susquehanna Steam Electric Station ......................................................................................... C-5 Table C-4 Environmental Optically Stimulated Luminescence Dosimetry Results Susquehanna Steam Electric Station ....................................................... C-7 Table C-5 Iodine-131 and Gamma Spectroscopic Analyses of Milk Susquehanna Steam Electric Station .............................................................................. C-10 Table C-6 Tritium and Gamma Spectroscopic Analyses of Groundwater Susquehanna Steam Electric Station ....................................................... C-12

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LIST OF TABLES (contd)

Table C-7 Annual Average Tritium Concentration in Precipitation, Monitoring Wells and Lake Took-a-While (LTAW) Surface Water Data Susquehanna Steam Electric Station ....................................................... C-14 Table C-8 Gross Beta, Tritium and Gamma Spectroscopic Analyses of Drinking Water Susquehanna Steam Electric Station ............................................ C-15 Table C-9 Gamma Spectroscopic Analyses of Food Products (Fruits, Vegetables, and Broadleaf) Susquehanna Steam Electric Station .......... C-16 Table C-10 Tritium and Gamma Spectroscopic Analyses of Surface Water Susquehanna Steam Electric Station ....................................................... C-17 Table C-11 Gamma Spectroscopic Analyses of Fish Susquehanna Steam Electric Station ...................................................................................................... C-19 Table C-12 Gamma Spectroscopic Analyses of Shoreline Sediment Susquehanna Steam Electric Station .............................................................................. C-20 Appendix D Tables Table D-1 Analytics Environmental Radioactivity Cross Check Program Teledyne Brown Engineering Environmental Services ............................................ D-2 Table D-2 DOEs Mixed Analyte Performance Evaluation Program (MAPEP)

Teledyne Brown Engineering Environmental Services............................. D-4 Table D-3 ERA Environmental Radioactivity Cross Check Program Teledyne Brown Engineering Environmental Services ............................................ D-5

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LIST OF TABLES (contd)

Appendix E Table Table E-1 REMP Sample Equipment Operability Trending Susquehanna Steam Electric Station ......................................................................................... E-2 LIST OF MAPS Map B-1 Direct Radiation Monitoring Locations Within One Mile.............................. B-10 Map B-2 Direct Radiation Monitoring Locations From One to Five Miles.................. B-11 Map B-3 Direct Radiation Monitoring Locations Greater than Five Miles.................. B-12 Map B-4 Environmental Sampling Locations Within One Mile .................................. B-13 Map B-5 Environmental Sampling Locations From One to Five Miles ...................... B-14 Map B-6 Environmental Sampling Locations Greater than Five Miles ...................... B-15 LIST OF FIGURES Figure C-1 Gross Beta Activity in Air Particulates......................................................... C-21 Figure C-2 Ambient Radiation Levels Based on Environmental Dosimetry Data ............................................................................................................ C-22 Figure C-3 Iodine-131 Activity in Milk ........................................................................... C-23 Figure C-4 Annual Average Tritium Activity in Precipitation and Surface Water Versus Ground Water ...................................................................... C-24

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LIST OF FIGURES (contd)

Figure C-5 Gross Beta Activity in Drinking Water ......................................................... C-25 Figure C-6 Tritium Activity in Surface Water ................................................................. C-26

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I. Summary During normal operations of a nuclear power generating station there are permitted releases of small amounts of radioactive material to the environment. To monitor and determine the effects of these releases a Radiological Environmental Monitoring Program (REMP) has been established around the Susquehanna Steam Electric Station (SSES). The results of the REMP are published annually, providing a summary and interpretation of the data collected.

Applied Ecoscience, Inc. was responsible for the collection of environmental samples during 2019. Teledyne Brown Engineering (TBE) was responsible for the analysis of environmental samples during 2019. The results are discussed in this report. Landauer provided the dosimetry services for SSES during 2019.

This Annual Radiological Environmental Operating Report (AREOR) conducted for SSES covers the period January 1, 2019 through December 31, 2019. During that time period, 1330 analyses were performed on 1139 samples.

Tritium (H-3) is the only man-made radionuclide detected in the environment by the Susquehanna Steam Electric Station (SSES) Radiological Environmental Monitoring Program (REMP) that is attributable to station operations. The whole body and organ dose to members of the public attributable to tritium identified in REMP cooling tower blowdown samples was 1.67E-04 mRem. Tritium was included in the dose calculation because it was identified in the REMP samples of permitted water being discharged to the Susquehanna River. The 2019 average concentration of tritium in the cooling tower blowdown water and the 2019 average cooling tower blowdown flow were used to determine the amount of tritium released. The presumed exposure pathways to the public from this radionuclide were drinking water taken from the Susquehanna River at Danville, PA and eating fish caught near the SSES discharge to the river. Dose from ground plane deposition (shoreline exposure) is not applicable because tritium does not emit gamma radiation and the beta radiation emitted by tritium is not sufficiently penetrating to reach an individual on the shore.

Based on the above outlined methodology, the total tritium activity released from the SSES to the Susquehanna River in 2019 was 12.4 curies.

The 2019 average dilution factor for the Susquehanna River was 1,124, based on the annual average river flow of 8.24E+06 gpm and the annual average cooling tower blowdown flow of 7.33E+03 gpm.

The REMP Sample Equipment Operability and year-to-year trend comparison is located in Appendix E, Table E-1.

The REMP was conducted in accordance with the SSES Technical Requirements Manual (TRM) and the respective station Offsite Dose Calculation Manual (ODCM) which are based on the design objectives in 10CFR Part 50, Appendix I, Sections IV.B.2, IV.B.3 and IV.C. The Lower Limit of Detection (LLD) values required by the TRM and SSES ODCM were achieved for the 2019 reporting period. The REMP objectives were also met during this period. The concentration of radioactive material in the environment that could be attributable to SSES operations was only a small fraction of the concentration of naturally occurring and man-made radioactivity. Since these results were comparable to the results obtained during the preoperational phase of the program and combined with historical results collected since commercial operation, it can be concluded that the levels and fluctuations were as expected and that the operation of the SSES had no significant radiological impact on the environment. Additionally, the REMP sample results for 2019 verify the adequacy of the SSES radioactive effluent control systems.

Samples of air particulates, air iodine, milk, groundwater, drinking water, vegetation, surface water, fish and sediment were collected and analyzed.

External radiation dose measurements were also made in the vicinity of SSES using passive dosimeters.

Air particulate samples were analyzed for concentrations of gross beta weekly and gamma emitting nuclides quarterly. Gross beta and cosmogenically produced beryllium-7 (Be-7) were detected at levels consistent with those detected in previous years. No fission or activation products were detected.

High sensitivity iodine-131 (I-131) analyses were performed on weekly air samples. All results were less than the minimum detectable concentration.

Environmental gamma radiation measurements were performed quarterly using optically stimulated luminescent dosimeters (OSLD). The levels of radiation detected were consistent with those observed in previous years.

Cow milk samples were analyzed for concentrations of I-131 and gamma emitting nuclides. All I-131 results were below the minimum detectable concentration. Naturally occurring potassium-40 (K-40) was detected at levels consistent with those detected in previous years. No fission or activation products were detected.

Groundwater samples were analyzed for concentrations of tritium and gamma emitting nuclides. Tritium activities were detected at levels consistent with those detected in previous years. No fission or activation products were detected.

Drinking water samples were analyzed for concentrations of tritium, gross beta and gamma emitting nuclides. Gross beta activities detected were consistent with those detected in previous years. No fission or activation products were detected.

Food product (fruits, vegetables and broadleaf vegetation) samples were analyzed for concentrations of gamma emitting nuclides. Naturally occurring Be-7 and K-40 were detected at levels consistent with those detected in previous years. No fission or activation products were detected.

Surface water samples were analyzed for concentrations of tritium and gamma emitting nuclides. Tritium activities detected were consistent with those detected in previous years. Naturally occurring thorium-228 (Th-228) was detected in one sample at a level consistent with results in previous years. No fission or activation products were detected.

Fish and shoreline sediment samples were analyzed for concentrations of gamma emitting nuclides. Naturally occurring K-40 was detected at levels consistent with those detected in previous years. Naturally occurring actinium-228 (Ac-228) and Th-228 were detected in shoreline sediment at levels consistent with results in previous years. No fission or activation products were detected in fish or sediment samples.

II. The Radiological Environmental Monitoring Program The Susquehanna Steam Electric Station (SSES) is a nuclear electrical generating facility with two boiling-water reactors and generators located just west of the Susquehanna River, approximately 5 miles northeast of Berwick, in Luzerne County, Pennsylvania. The station was constructed in the 1970s, with Unit 1 beginning commercial operation on June 8, 1983, and Unit 2 beginning commercial operation on February 12, 1985. Units 1 and 2 each generate a net 1,350 megawatts (MWe), for a total station output of 2,700 MWe.

In total Susquehanna Nuclear, LLC presently owns 2,347 acres of land on both sides of the Susquehanna River. Generally, this land is characterized by open deciduous woodlands interspersed with grasslands.

On the west side of the river, 1,605 (1,670 minus 65 acre Gould Island) acres of land is jointly owned between Susquehanna Nuclear, LLC (90%) and Allegheny Electric Cooperative (10%). The land use on the west side of the river includes generation and associated maintenance facilities, laydown areas, parking lots, roads, a nature preserve (the Susquehanna Riverlands),

and agricultural leases to local farmers.

To the north of the station along the river, Susquehanna Nuclear, LLC owns 100% of the 65-acre Gould Island. On the east side of the river, and across the river from the station, Susquehanna Nuclear, LLC is the 100% owner of 677 acres that are maintained as undeveloped land, natural recreational areas, wildlife areas, and leases to local farmers.

More specific information on the demography, hydrology, meteorology, and land use characteristics of the area in the vicinity of the SSES can be found in the Environmental Report [Reference 1], the Final Safety Analysis Report

[Reference 2] and the Final Environmental Statement [Reference 3] for the SSES.

Radioanalytical data from samples collected under the REMP were compared with results from the preoperational phase and historical results during operations. Differences between these periods were examined statistically to determine the effects of station operations. This report presents the results from January 1 through December 31, 2019, for the SSES Radiological Environmental Monitoring Program (REMP).

A. Objectives of the Operational REMP The objectives of the Operational REMP are to:

1. Document compliance with SSES REMP Technical Requirements and radiological environmental surveillances.

2. Verify proper implementation of SSES radiological effluent controls.

3. Identify, measure and evaluate trends of radionuclide concentrations in environmental pathways near SSES.

4. Assess impact of SSES Effluents on the Environment and the public.

5. Verify that SSES operations have no detrimental effects on the health and safety of the public or on the environment.

B. Implementation of the Objectives

1. In order to meet the objectives, an operational REMP was developed. Samples of various media were selected for monitoring due to the radiological dose impact to humans and other organisms. The selection of samples was based on:

(a) Established critical pathways for the transfer of radionuclides through the environment to man, and (b) Experience gained during the preoperational phase.

Sampling locations were determined based on site meteorology, Susquehanna River hydrology, local demography, and land uses.

2. Sampling locations were divided into two classes, indicator and control. Indicator locations were sited where it is expected that radiation and radioactive material that might originate from the station would be detectable. Control locations were selected in areas where they would be unaffected by station operations (i.e. Susquehanna River upstream from the station, >10 miles from the station in least prevalent wind directions). Fluctuations in the levels of radionuclides and direct radiation at indicator locations were evaluated with respect to analogous fluctuations at control locations. Indicator and control location data were also evaluated relative to preoperational data.

3. Appendix A, Program Summary, describes and summarizes the analytical results in accordance with the SSES Technical Specifications.

4. Appendix B, Sample Designation and Locations, describes the coding system which identifies sample type and location. Table B-1 lists the location codes, locations, latitude, longitude, and the types of samples collected at each location. Table B-2 contains sample medium, analysis and sampling details.

5. The sampling locations are indicated on the following maps:

Map B-1, Direct Radiation Monitoring Locations Within One Mile Map B-2, Direct Radiation Monitoring Locations From One to Five Miles Map B-3, Direct Radiation Monitoring Locations Greater Than Five Miles Map B-4, Environmental Sampling Locations Within One Mile Map B-5, Environmental Sampling Locations From One to Five Miles Map B-6, Environmental Sampling Locations Greater Than Five Miles III. Program Description A. Data Interpretation Results of analyses are grouped according to sample type and presented in Appendix C, Data Tables. All results above the Lower Limit of Detection (LLD) are at a confidence level of +/- 2 sigma. This represents the range of values into which 95% of repeated analyses of the same sample should fall. As defined in U.S. Nuclear Regulatory Commission Regulatory Guide 4.8, LLD is the smallest concentration of radioactive material in a sample that will yield a net count (above system background) that will be detected with 95% probability, with only 5% probability of falsely concluding that a blank observation represents a "real signal." LLD is normally calculated as 4.66 times the standard deviation of the background counting rate, or of the blank sample count, as appropriate, divided by counting efficiency, sample size, 2.22 (dpm per picocurie), the radiochemical yield when applicable, the radioactive decay constant and the elapsed time between sample collection and time of counting. LLD represents the capability of the measurement system.

The Minimum Detectable Concentration (MDC) is defined as the smallest concentration of radioactive material that can be detected at a given confidence level. The MDC differs from the LLD in that the MDC takes into consideration the interference caused by the presence of other nuclides while the LLD does not. MDC is an indicator of the performance of the measurement system. The MDC is set to be below the LLD.

Summaries of the radionuclide average picocurie activities and ranges are included in Table A. If a radionuclide was not detected, zero was used for that isotope in dose calculations and the activity is listed as

<MDC (less than the minimum detectable concentration) in Table A.

<MDC indicates that no activity was positively detected in any sample when samples were analyzed with techniques which achieved the required Lower Limits of Detection (LLD). The following are typical measurement laboratory MDCs for airborne and waterborne REMP samples.

Airborne REMP Typical MDCs Radionuclide MDC (pCi/cu.m.)

Mn-54 1.2 E-03 Fe-59 7.5 E-03 Co-58 1.9 E-03 Co-60 1.3 E-03 Zn-65 3.0 E-03 Cs-134 1.2 E-03 Cs-137 1.0 E-03 I-131 3.7 E-01 Waterborne REMP Typical MDCs Radionuclide MDC (pCi/L.)

H-3 (DIST) 1.4 E+02 Mn-54 3.7 E+00 Fe-59 1.1 E+01 Co-58 3.8 E+00 Co-60 4.0 E+00 Zn-65 7.8 E+00 Cs-134 3.6 E+00 Cs-137 3.9 E+00 I-131 1.1 E+01 H-3 1.4 E+02 Gross Beta 1.9 E+00 The grouped data were averaged and standard deviations calculated.

Thus, the +/- 2 sigma of the averaged data represent sample and not analytical variability. For reporting and calculation of averages, any result occurring at or below the LLD is considered to be at the LLD level.

B. Program Exceptions See Exceptions Table 2019 REMP Atypical Sampling Occurrences C. Program Changes There were no program changes in 2019.

Exceptions Table 2019 REMP Atypical Sampling Occurrences Date Sample Location Sample Period Corrective Action Type Code(s) Reason for Occurrence(s)

Air 10S3 01/09/19 to 01/16/19 CA #19-02 CR 2019-00772 Timer box failed to advance for sample period. 01/16/19: Timer box was reset and monitored Timer box malfunction did not affect normal to ensure advancement.

sample collection. 01/16/19: Operability verified @ 0938 hours0.0109 days 0.261 hours 0.00155 weeks 3.56909e-4 months .

Continuous sampling during sample period. Ideal sample collected for sample period:

23,100 cf.

JAN Air 12S1 01/16/19 to 01/23/19 (loss of 1.4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months ) CA #19-03 CR 2019-00850 12kV power outage occurred @ 1511 hours0.0175 days 0.42 hours 0.0025 weeks 5.749355e-4 months on 01/17/19: No action required. Air monitor 01/17/19. resumed normal operation when power was Loss of 1.4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months as determined by timer box. restored.

01/18/19: Operability verified @ 0840 hours0.00972 days 0.233 hours 0.00139 weeks 3.1962e-4 months .

Non-continuous sampler operation.

Ideal sample collected for sample period:

23,400 cf.

Air 9B1 03/06/19 to 03/13/19 (loss of 0.5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months ) CA #19-04 CR 2019-03341 Power outage date and time unknown. 03/13/19: No action required. Air monitor Loss of 0.5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months as determined by timer box resumed normal operation when power was during weekly collection. restored.

MAR 03/13/19: Operability verified @ 1153 hours0.0133 days 0.32 hours 0.00191 weeks 4.387165e-4 months .

Non-continuous sampler operation.

Ideal sample collected for sample period:

21,200 cf.

Exceptions Table (continued)

Date Sample Location Sample Period Corrective Action Type Code(s) Reason for Occurrence(s)

Air 10S3 04/10/19 to 04/17/19 (loss of 55.7 hours8.101852e-5 days 0.00194 hours 1.157407e-5 weeks 2.6635e-6 months ) CA #19-05 CR 2019-05462 Air monitor was not operational upon arrival or 04/17/19: Power restored @1142 hours and air departure on 04/17/19 due to local power monitor resumed normal operation.

outage. Power outage began on 04/15/19 @ 04/17/19: Operability verified @ 1306 hours0.0151 days 0.363 hours 0.00216 weeks 4.96933e-4 months 0120 hours as determined by timer box.

Less than ideal sample collected for sample Non-continuous sampler operation. period:

14,800 cf (04/10/19 to 04/17/19).

Volume adequate to support required analysis.

Air 8G1 04/10/19 to 04/17/19 (loss of 0.5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months ) CA #19-06 CR 2019-05464 Power outage due to downed pole maintenance. 04/17/19: No action required. Air monitor Loss of 0.5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months as determined by timer box resumed normal operation when power was APR during weekly collection, and notification from restored.

PPL System Facilities Center. 04/17/19: Operability verified @ 1100 hours0.0127 days 0.306 hours 0.00182 weeks 4.1855e-4 months .

Non-continuous sampler operation. Ideal sample collected for sample period:

22,100 cf.

Air 10S3 04/17/19 to 04/24/19 (loss of 10.6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months ) CA #19-07 CR 2019-05858 Power outage date and time unknown. 04/24/19: No action required. Air monitor Loss of 10.6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months as determined by timer box resumed normal operation when power was during weekly collection. restored.

04/24/19: Operability verified @ 1127 hours0.013 days 0.313 hours 0.00186 weeks 4.288235e-4 months .

Non-continuous sampler operation.

Ideal sample collected for sample period:

20,200 cf.

Exceptions Table (continued)

Date Sample Location Sample Period Corrective Action Type Code(s) Reason for Occurrence(s)

Air 13S6 05/01/19 to 05/08/19 (loss of 5.2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months ) CA #19-08 CR 2019-06501 Power outage date and time unknown. 05/08/19: No action required. Air monitor Loss of 5.2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months as determined by timer box resumed normal operation when power was during weekly collection. restored.

MAY 05/08/19: Operability verified @ 0828 hours0.00958 days 0.23 hours 0.00137 weeks 3.15054e-4 months .

Non-continuous sampler operation.

Ideal sample collected for sample period:

21,000 cf.

Surface 2S7 06/10/19 to 08/27/19 (week 2 June-week 4 CA #19-09 CR 2019-07896 & CR 2019-07882 Water August) 08/27/19: Line work completed and flow CTBD auto composite sampling switched to restored to auto composite sampler.

weekly grab sampling due to line unavailability. 08/27/19: Operability verified @ 1032 hours0.0119 days 0.287 hours 0.00171 weeks 3.92676e-4 months .

Composite sampling turned off 06/10/19 @ 0933 hours0.0108 days 0.259 hours 0.00154 weeks 3.550065e-4 months . Grab samples collected for sample periods.

Line work completed under PCWO 2168089.

JUN Air 12S1 06/05/19 to 06/12/19 (loss of 0.2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months ) CA #19-10 CR 2019-07921 12kV power outage occurred on 06/10/19. Repair 06/10/19 & 06/11/19: No action required. Air work to the 12kV line caused an additional power monitor resumed normal operation when power outage on 06/11/19. was restored.

Loss of 0.2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months total as determined by timer 06/11/19: Operability verified @ 0821 hours0.0095 days 0.228 hours 0.00136 weeks 3.123905e-4 months box. and @ 1400 hours0.0162 days 0.389 hours 0.00231 weeks 5.327e-4 months .

Non-continuous sampler operation. Ideal sample collected for sample period:

21,600 cf.

Exceptions Table (continued)

Date Sample Location Sample Period Corrective Action Type Code(s) Reason for Occurrence(s)

Drinking 12H2 06/25/19 to 07/02/19 (week 1 July) CA #19-11 CR 2019-08837 Water Contractor replacing chlorine lines @ Danville 07/02/19: Flow restored to ACS @ 0720 hours0.00833 days 0.2 hours 0.00119 weeks 2.7396e-4 months .

Water Company shut off valve to automatic 07/02/19: Operability verified @ 0721 hours0.00834 days 0.2 hours 0.00119 weeks 2.743405e-4 months .

composite sampler (ACS) on 06/26/19 (time 07/02/19: Grab sample collected @ 1238 hours0.0143 days 0.344 hours 0.00205 weeks 4.71059e-4 months , unknown). Early stop for week 1 July composite. as per procedure. Valve to ACS tagged directing that Applied Ecoscience is to be notified Non-continuous sampler operation. immediately of any changes to valve or sampler.

Less than ideal sample volume collected for sample period. Grab sample collected.

JUL Air 12S1 07/17/19 to 07/24/19 (momentary losses of 12kV CA #19-12 CR 2019-09436, 2019-09438, &

power) 2019-09544 Momentary losses of power on 07/17/19 @ 1653 07/17/19 & 07/21/19: No action required. Air hours & 07/21/19 @ 1934 hours0.0224 days 0.537 hours 0.0032 weeks 7.35887e-4 months . monitor resumed normal operation when power No loss of sampling time as determined by timer was restored.

box during weekly collection. 07/18/19: Operability verified @ 0903 hours0.0105 days 0.251 hours 0.00149 weeks 3.435915e-4 months .

07/22/19: Operability verified @ 0856 hours0.00991 days 0.238 hours 0.00142 weeks 3.25708e-4 months .

Non-continuous sampler operation.

Ideal sample collected for sample period:

21,100 cf.

Air 12S1 08/07/19 to 08/14/19 (momentary loss of 12kV CA #19-13 CR 2019-10348 power) 08/11/19: No action required. Air monitor Momentary loss of power on 08/11/19. resumed normal operation when power was No loss of sampling time as determined by timer restored.

AUG box during weekly collection. 08/11/19: Operability verified @ 1502 hours0.0174 days 0.417 hours 0.00248 weeks 5.71511e-4 months .

Non-continuous sampler operation. Ideal sample collected for sample period:

21,800 cf.

Exceptions Table (continued)

Date Sample Location Sample Period Corrective Action Type Code(s) Reason for Occurrence(s)

Air 12S1 08/14/19 to 08/21/19 (loss of 0.5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months ) CA #19-14 CR 2019-10587 12kV power outages occurred on 08/16/19 due to 08/16/19: No action required. Air monitor maintenance on the 12kV line from approximately resumed normal operation when power was 08:10-08:30 and 12:31-12:49. restored.

Loss of 0.5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months total as determined by timer 08/16/19: Operability verified @ 1140 hours0.0132 days 0.317 hours 0.00188 weeks 4.3377e-4 months &

box and known outage times. 1343 hours0.0155 days 0.373 hours 0.00222 weeks 5.110115e-4 months .

Non-continuous sampler operation. Ideal sample collected for sample period:

21,300 cf.

Air 10S3 08/14/19 to 08/21/19 (loss of 2.0 hours0 days 0 hours 0 weeks 0 months ) CA #19-15 CR 2019-10773 Power outage date and time unknown. 08/21/19: No action required. Air monitor Loss of 2.0 hours0 days 0 hours 0 weeks 0 months as determined by timer box resumed normal operation when power was AUG (cont.)

during weekly collection. restored.

08/21/19: Operability verified @ 0825 hours0.00955 days 0.229 hours 0.00136 weeks 3.139125e-4 months .

Non-continuous sampler operation.

Ideal sample collected for sample period:

20,700 cf.

Air 12S1 08/28/19 to 09/04/19 (loss of 9.1 hours1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months ) CA #19-16 CR 2019-11016 12kV power outage occurred on 08/31/19 due to 08/31/19: No action required. Air monitor maintenance on the 12kV line. resumed normal operation when power was Loss of 9.1 hours1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months total as determined by timer restored.

box. 08/31/19: Operability verified @ 1743 hours0.0202 days 0.484 hours 0.00288 weeks 6.632115e-4 months .

Non-continuous sampler operation. Ideal sample collected for sample period:

20,700 cf.

Exceptions Table (continued)

Date Sample Location Sample Period Corrective Action Type Code(s) Reason for Occurrence(s)

Air 12S1 10/02/19 to 10/09/19 (momentary loss of 12kV CA #19-17 CR 2019-12465 power) 10/02/19: No action required. Air monitor Momentary loss of power on 10/02/19. resumed normal operation when power was No loss of sampling time as determined by timer restored.

box during weekly collection. 10/03/19: Operability verified @ 0856 hours0.00991 days 0.238 hours 0.00142 weeks 3.25708e-4 months .

Non-continuous sampler operation. Ideal sample collected for sample period:

22,500 cf.

OCT Air 12S1 10/23/19 to 10/30/19 (loss of 0.7 hours8.101852e-5 days 0.00194 hours 1.157407e-5 weeks 2.6635e-6 months ) CA #19-18 CR 2019-13468 12kV power outage occurred on 10/25/19 due to 10/25/19: No action required. Air monitor maintenance on the 12kV line. resumed normal operation when power was Loss of 0.7 hours8.101852e-5 days 0.00194 hours 1.157407e-5 weeks 2.6635e-6 months total as determined by timer box. restored.

10/25/19: Operability verified @ 1645 hours0.019 days 0.457 hours 0.00272 weeks 6.259225e-4 months .

Non-continuous sampler operation.

Ideal sample collected for sample period:

22,600 cf.

Surface 6S6 10/29/19 to 11/05/19 (week 1 November CA #19-19 CR 2019-14030 Water composite) 11/05/19: Adequate sample volume collected Diminished sample flow (<0.5 gpm) at ACS as during sample period. Maintenance requested.

discovered during weekly collection. 11/06/19: Maintenance performed by I&C and sample flow restored to 1.5 gpm.

NOV 11/12/19: Operability verified @ 1111 hours0.0129 days 0.309 hours 0.00184 weeks 4.227355e-4 months .

Ideal sample collected for sample periods.

D. Quality Assurance Program Teledyne Brown Engineering The quality of the results obtained by TBE is ensured by the implementation of the Quality Assurance Program as described in the Teledyne Brown Engineering Quality Assurance Manual and the Teledyne Brown Engineering Procedure Manual.

E. Summary of Results - Inter-Laboratory Comparison Program The TBE Laboratory analyzed Performance Evaluation (PE) samples of air particulate, air iodine, milk, soil, vegetation, and water matrices for various analytes. The PE samples supplied by Analytics Inc.,

Environmental Resource Associates (ERA) and Department of Energy (DOE) Mixed Analyte Performance Evaluation Program (MAPEP),

were evaluated against the following pre-set acceptance criteria:

1. Analytics Evaluation Criteria Analytics evaluation report provides a ratio of TBEs result and Analytics known value. Since flag values are not assigned by Analytics, TBE evaluates the reported ratios based on internal QC requirements based on the DOE MAPEP criteria.

2. ERA Evaluation Criteria ERAs evaluation report provides an acceptance range for control and warning limits with associated flag values. ERAs acceptance limits are established per the USEPA, National Environmental Laboratory Accreditation Conference (NELAC), state-specific Performance Testing (PT) program requirements or ERAs SOP for the Generation of Performance Acceptance Limits, as applicable.

The acceptance limits are either determined by a regression equation specific to each analyte or a fixed percentage limit promulgated under the appropriate regulatory document.

3. DOE Evaluation Criteria MAPEPs evaluation report provides an acceptance range with associated flag values. MAPEP defines three levels of performance:

Acceptable (flag = A) - result within +/- 20% of the reference value

Acceptable with Warning (flag = W) - result falls in the

+/- 20% to +/- 30% of the reference value

Not Acceptable (flag = N) - bias is greater than 30% of the reference value Note: The Department of Energy (DOE) Mixed Analyte Performance Evaluation Program (MAPEP) samples are created to mimic conditions found at DOE sites which do not resemble typical environmental samples obtained at commercial nuclear power facilities.

Teledyne Brown Engineering For the TBE laboratory, 119 out of 129 analyses performed met the specified acceptance criteria. Ten analyses did not meet the specified acceptance criteria for the following reasons and were addressed through the TBE Corrective Action Program.

1. The ERA April 2019 water Cs-134 result was evaluated as Not Acceptable. The reported value was 15.2 pCi/L (error 2.82 pCi/L) and the known result was 12.1 pCi/L (acceptance range of 8.39 - 14.4 pCi/L). With the error, the reported result overlaps the acceptable range. This sample was run as the workgroup duplicate on a different detector with a result of 10.7 pCi/L (within acceptable range). (NCR 19-10)

2. The ERA April 2019 water Sr-89 result was evaluated as Not Acceptable. The reported value was 44.9 pCi/L and the known result was 33.3 pCi/L (acceptance range of 24.5 - 40.1 pCi/L).

The sample was only counted for 15 minutes instead of 200 minutes. The sample was re-prepped in duplicate and counted for 200 minutes with results of 30.7 +/- 5.37 pCi/L and 33.0 +/-

8.71 pCi/L. This was the 1st high failure for Sr-89 in 5 years.

(NCR 19-11)

3. The MAPEP February 2019 soil Sr-90 result was not submitted and therefore evaluated as Not Acceptable. The sample was run in duplicate, with results of -1.32 +/- 4.09 Bq/kg (<6.87) and -

1.030 +/- 3.55 Bq/kg (<5.97). The known result was a false positive test (no significant activity). TBE did not submit a result because it appeared that the results may not be accurate. TBE analyzed a substitute soil Sr-90 sample from another vendor, with a result within the acceptable range.

(NCR 19-12)

4. The MAPEP February 2019 water Am-241 result was evaluated as Not Acceptable. The reported value was 0.764 +/- 0.00725 Bq/L with a known result of 0.582 Bq/L (acceptable range 0.407

- 0.757 Bq/L). TBEs result falls within the upper acceptable range with the error. It appeared that a non-radiological interference was added and lead to an increased mass and higher result. (NCR 19-13)

5. The MAPEP February 2019 vegetation Sr-90 result was evaluated as Not Acceptable. The reported result was -0.1060

+/- 0.0328 Bq/kg and the known result was a false positive test (no significant activity). TBEs result was correct in that there was no activity. MAPEPs evaluation was a statistical failure at 3 standard deviations. (NCR 19-14)

6. The ERA October 2019 water Gross Alpha result was evaluated as Not Acceptable. TBEs reported result was 40.5 +/-

10.3 pCi/L and the known result was 27.6 pCi/L (ratio of TBE to known result at 135%). With the associated error, the result falls within the acceptable range (14.0 - 36.3 pCi/L). The sample was run as the workgroup duplicate on a different detector with a result of 30.8 +/- 9.17 pCi/L (within the acceptable range). This was the first failure for drinking water Gr-A since 2012. (NCR 19-23)

7. The ERA October 2019 water Sr-90 result was evaluated as Not Acceptable. TBEs reported result was 32.5 +/- 2.12 pCi/L and the known result was 26.5 pCi/L (ratio of TBE to known result at 123%). With the associated error, the result falls within the acceptable range (19.2 - 30.9 pCi/L). The sample was run as the workgroup duplicate on a different detector with a result of 20.0 +/- 1.91 pCi/L (within the acceptable range). Both TBE results are within internal QC limits. A substitute quick response sample was analyzed with an acceptable result of 20.1 pCi/L (known range of 13.2 - 22.1 pCi/L). (NCR 19-24)

8. The MAPEP August 2019 soil Ni-63 result of 436 +/- 22.8 Bq/kg was evaluated as Not Acceptable. The known result was 629 Bq/kg (acceptable range 440 - 818 Bq/kg). With the associated error, the TBE result falls within the lower acceptance range.

All associated QC was acceptable. No reason for failure could be found. This is the first failure for soil Ni-63 since 2012.

(NCR 19-25).

9. The MAPEP August 2019 water Am-241 result was not reported and therefore evaluated as Not Acceptable. Initial review of the results showed a large peak where Am-241 should be (same as the February, 2019 sample results). It is believed that Th-228 was intentionally added as an interference. The sample was re-prepped and analyzed using a smaller sample aliquot. The unusual large peak (Th-228) was seen again and also this time a smaller peak (Am-241).

The result was 436 +/- 22.8 Bq/L (acceptable range 0.365 +/-

0.679 Bq/L). Th-228 is not a typical nuclide requested by clients, so there is no analytical purpose to take samples through an additional separation step. TBE will pursue using another vendor for Am-241 water cross-checks that more closely reflects actual customer samples. (NCR 19-26)

10. The Analytics September 2019 soil Cr-51 sample was evaluated as Not Acceptable. TBEs reported result of 0.765 +/-

0.135 pCi/g exceeded the upper acceptance range (140% of the known result of 0.547 pCi/g). The TBE result was within the acceptable range (0.63 - 0.90 pCi/g) with the associated error.

The Cr-51 result is very close to TBEs normal detection limit.

In order to get a reportable result, the sample must be counted for 15 hours1.736111e-4 days 0.00417 hours 2.480159e-5 weeks 5.7075e-6 months (10x longer than client samples). There is no client or regulatory requirement for this nuclide and TBE will remove Cr-51 from the reported gamma nuclides going forward. (NCR 19-27)

The Inter-Laboratory Comparison Program provides evidence of in control counting systems and methods, and that the laboratories are producing accurate and reliable data.

IV. Results and Discussion The analytical results of the 2019 REMP samples are divided into categories based on exposure pathways: atmospheric, direct radiation, terrestrial, and aquatic. The analytical results for the 2019 REMP are summarized in Appendix A, Program Summary. The data for individual samples are presented in Appendix C, Data Tables. The data are compared to the formal preoperational environmental monitoring program data (April 1972 to September 1982) and to data during operations. The data collected demonstrates that the SSES REMP was conducted in compliance with the TRM and the SSES ODCM.

A. Atmospheric Atmospheric REMP sampling included the collection of air particulates, air iodine and direct radiation samples.

1. Air Particulates Air particulate samples were collected weekly at six indicator locations (3S2, 9B1, 10S3, 12E1, 12S1 and 13S6) and one control locations (8G1). Each of the samples collected for the year were analyzed for gross beta. Quarterly composites of the weekly samples from each location were analyzed for specific gamma emitters.

Gross Beta Gross beta activity was detected in 312 of 312 of the indicator location samples at concentrations ranging from 7 to 24 E-3 pCi/m3 with an average concentration of 13 E-3 pCi/m3, and in 52 of 52 of the control location samples at concentrations ranging from 6 to 21 E-3 pCi/m3 with an average of 12 E-3 pCi/m3. The maximum preoperational level detected was 102 E-3 pCi/m3 with an average concentration of 62 E-3 pCi/m3.

(Table C-1, Appendix C); Historical levels of gross beta are shown in Figure C-1. Results for gross beta analysis from 1974 to current year are plotted.

Gamma Spectrometry Gamma spectrometry was performed on each of the 28 quarterly composite samples. Beryllium-7, attributed to cosmic ray activity in the atmosphere, was detected in all 24 indicator location composites at concentrations ranging from 77 E-3 to 160 E-3 pCi/m3 with an average concentration of 114 E-3 pCi/m3, and in the four control location composites ranging in concentration from 93 to 118 E-3 pCi/m3 with an average concentration of 108 E-3 pCi/m3.

The maximum preoperational level detected was 85 E-3 pCi/m3 with an average concentration of 74 E-3 pCi/m3. (Table C-2, Appendix C)

All other gamma emitters were less than the LLD.

2. Air Iodine Filtered air iodine samples were collected weekly at six indicator locations (3S2, 9B1, 10S3, 12E1, 12S1, and 13S6) and one control locations (8G1). Each of the samples collected for the year were analyzed for I-131.

Iodine-131 Iodine-131 was not detected in any indicator location samples or control location samples. Preoperational data is not available for comparison. (Table C-3, Appendix C)

B. Direct Radiation Ambient radiation levels in the environs were measured with a pair of optically stimulated luminescent dosimeters (OSLD) composed of aluminum oxide crystals supplied and processed by Landauer.

Packets containing OSLDs for quarterly exposure were placed in the owner-controlled area and around the site at various distances and in each land-based meteorological sector. Emphasis was placed on special interest areas such as population centers, nearby residences, and schools.

A total of 57 locations were monitored for direct radiation during 2019, including 32 site boundary locations, 14 outer distant locations, six special interest locations and five control locations.

The indicator locations annual average dose rate was 16.8 milliroentgen per standard quarter. The annual average dose rate for the control locations was 14.9 milliroentgen per standard quarter. The preoperational average for the quarterly direct radiation readings was 17.6 milliroentgen per standard quarter. The results of the direct radiation measurements for 2019 confirmed that the radiation levels in the vicinity of the SSES were similar to previous years. (Table C-4, Appendix C); Figure C Ambient Radiation Levels Based on Environmental Dosimetry Data from 1973 to current year are plotted as quarterly averages.

C. Terrestrial Terrestrial REMP sampling included the collection of milk, groundwater, drinking water, and vegetation.

1. Milk Milk samples were collected biweekly when cows were on pasture and monthly when cows were not grazing on pasture.

Animals are considered on pasture from April to October of each year. Samples were collected in new polyethylene containers and transported in ice chests with preservatives added to the milk.

Milk samples were collected at local dairy farms from 2 indicator locations (5E2 and 13E3) and one control location (10G1). Each sample was analyzed for I-131 and gamma emitters.

Iodine-131 Iodine-131 was not detected above minimum detectable concentration in any of the 60 samples analyzed.

Preoperational data is not available for comparison. (Table C-5, Appendix C); Figure C Iodine-131 Activity in Milk results from 1976 to 2019 are plotted.

Gamma Spectrometry Naturally occurring K-40 was detected in all 60 samples with concentrations for the 40 indicator location samples ranging from 1,042 to 1,504 pCi/L with an average concentration of 1,277 pCi/L, and the 20 control location sample concentrations ranging from 1,080 to 1,463 pCi/L with an average concentration of 1,330 pCi/L. The maximum preoperational level detected was 1,500 pCi/L with an average concentration of 1,358 pCi/L.

All other gamma emitters were less than the LLD.

2. Groundwater An expanded groundwater monitoring network was initiated in 2006 for the SSES as part of a site-wide hydrogeological investigation in accordance with the Nuclear Energy Institute (NEI) Groundwater Protection Initiative (GPI). The additional groundwater monitoring wells are sampled as part of the Radiological Environmental Monitoring Program (REMP) to regularly assess groundwater quality and provide early detection of any inadvertent leaks or spills of radioactive materials that could reach groundwater. Groundwater is sampled quarterly and analyzed for H-3 and gamma activity.

Additionally, precipitation sampling was initiated in 2007 and analyzed for H-3 activity to assess the influence of station airborne H-3 emissions on groundwater H-3 activities.

Precipitation washout monitoring data is not used in dose calculations; however, the data does give a gross indication of H-3 which makes its way into surface water and soil where it eventually seeps into shallow groundwater. The annual average H-3 concentrations in precipitation, groundwater monitoring wells and surface water are summarized in Table C-7 and graphically depicted in Figure C Annual Average Tritium Activity (pCi/L) in Precipitation and Surface Water Versus Groundwater.

Groundwater samples were collected quarterly at 9 indicator locations (1S3, 4S8, 4S9, 8S4, 7S10, 2S8, 6S11A, 6S12 and 7S11) and one control station (13S7). Each sample was analyzed for H-3 and gamma emitters.

Tritium Tritium activity was detected above the minimum detectable concentration in 12 of the 36 indicator location samples with concentrations ranging from 154 to 343 pCi/L with an average concentration of 209 pCi/L. Two of the four control location samples had tritium activity above the minimum detectable concentration with a range of 150 to 177 pCi/L and a concentration of 164 pCi/L. The maximum preoperational level detected was 119 pCi/L. (Table C-6, Appendix C); Figure C-4

- Annual Average Tritium Activity (pCi/L) in Precipitation and Surface Water Versus Groundwater results from 2007 to 2019 are plotted.

Gamma Spectrometry Naturally occurring K-40 was not detected in any of the indicator or control samples. Preoperational data is not available for comparison. (Table C-6, Appendix C)

All other gamma emitters were less than the LLD.

3. Drinking Water Drinking water samples were collected monthly from one location (12H2). Each sample was analyzed for gross beta, H-3 and gamma emitters.

Gross Beta Gross beta activity was detected in five of the 13 drinking water samples. Sample concentrations ranged from 2.4 to 2.8 pCi/L with an average concentration of 2.6 pCi/L. The maximum preoperational level detected was 2.8 pCi/L with an average concentration of 1.8 pCi/L. (Table C-8, Appendix C); Figure C Gross Beta Activity in Drinking Water results from 1977 to 2019 are plotted.

Tritium Tritium activity was not detected in any of the samples. The maximum preoperational level detected was 194 pCi/L with an average of 132 pCi/L. (Table C-8, Appendix C)

Gamma Spectrometry Naturally occurring K-40 was not detected in any of the samples. Preoperational data is not available for comparison.

(Table C-8, Appendix C)

All other gamma emitters were less than the LLD.

4. Food Products Food products from two indicator locations (11D1 and 11S6) were collected throughout the growing season. All samples (fruit, vegetable, and broadleaf) were analyzed for gamma emitters and included soy beans, field corn, pumpkin, swiss chard and collards.

Gamma Spectrometry Naturally occurring Be-7, attributed to cosmic ray activity in the atmosphere, was detected in four of the 13 indicator location samples with concentrations ranging from 352 to 958 pCi/kg wet with an average concentration of 594 pCi/kg wet.

Preoperational data is not available for comparison.

Naturally occurring K-40 was detected in all 13 indicator location samples with concentrations ranging from 2,857 to 17,410 pCi/kg wet with an average concentration of 5,325 pCi/kg wet. The maximum preoperational level detected was 4,800 pCi/kg wet with an average concentration of 2,140 pCi/kg wet.

Naturally occurring Ac-228 was not detected in any of the indicator or control locations. Preoperational data is not available for comparison.

Naturally occurring Th-228 was not detected in any of the indicator or control locations. Preoperational data is not available for comparison. (Table C-9, Appendix C)

All other gamma emitters were less than the LLD.

D. Aquatic Aquatic samples include surface water, fish and sediment samples.

1. Surface Water Surface water samples were collected routinely at two indicator locations (6S5 and 2S7) and one control location (6S6). Each sample was analyzed for H-3 and gamma emitters.

Tritium Tritium activity was detected in 12 of 25 indicator location samples with concentrations ranging from 164 to 3,660 pCi/L with an average concentration of 847 pCi/L. The range of H-3 levels in surface water are biased high due to inclusion of samples from the cooling tower blowdown line (CTBD; location 2S7). Routine station operation includes infrequent batch releases of slightly radioactive water which are discharged into the CTBD. When the H-3 concentration from CTBD samples is averaged with those obtained from Susquehanna River downstream monitoring locations, the result is an overall indicator location average that is higher than the actual average H-3 levels of the downstream river water. No radioactivity attributable to station operations was identified above analysis detection levels in any samples from the Susquehanna River in 2019. Tritium was not detected in any of the control location samples. The maximum preoperational level detected was 319 pCi/L, with an average concentration of 140 pCi/L. (Table C-10, Appendix C) Figure C Tritium Activity in Surface Water, results from 1972 to 2019 are plotted.

Gamma Spectrometry Naturally occurring K-40 was not detected in any of the indicator location or control location samples. Preoperational data is not available for comparison.

Iodine-131 was not detected in any of the indicator or control samples. The maximum preoperational level detected was 0.43 pCi/L, with an average concentration of 0.33 pCi/L. (Table C-10, Appendix C)

Naturally occurring Th-228 was detected in one indicator location sample with an average concentration of 8.0 pCi/L.

Preoperational data is not available for comparison. (Table C-10, Appendix C)

All other gamma emitters were less than the LLD.

2. Fish Edible species of fish were collected in the spring and fall of 2019 at two indicator locations (IND [Susquehanna River] and LTAW (only collected in the fall)) and one control location (2H

[Susquehanna River]). Each sample was analyzed for gamma emitters.

Gamma Spectrometry Naturally occurring K-40 was detected in all indicator location samples at concentrations ranging from 3,354 to 4,393 pCi/kg wet with an average concentration of 3,946 pCi/kg wet, and in all control location samples at concentrations ranging from 2,889 to 4,485 pCi/kg wet with an average concentration of 3,681 pCi/kg wet. The maximum preoperational level detected was 3,600 pCi/kg dry with an average concentration of 3,871 pCi/kg dry. (Table C-11, Appendix C)

All other gamma emitters were less than the LLD.

3. Shoreline Sediment Sediment samples were collected from the Susquehanna River in the spring and fall at two indicator locations (7B and 12F) and one control location (2B). Each sample was analyzed for gamma emitters.

Gamma Spectroscopy Naturally occurring K-40 was detected in all four of the indicator location samples at concentrations ranging from 8,495 to 13,510 pCi/kg dry with an average concentration of 10,939 pCi/kg dry, and in all of the control location samples with concentrations ranging from 12,590 to 16,100 pCi/kg dry with an average concentration of 14,345 pCi/kg dry. The maximum preoperational level detected was 11,000 pCi/kg dry with an average concentration of 8,500 pCi/kg dry.

Cesium-137 was not detected in any of the indicator or control location samples. The maximum preoperational level detected was 210 pCi/kg dry with an average concentration of 110 pCi/kg dry.

Naturally occurring Ra-226 was not detected in any of the indicator or control location samples.The maximum preoperational level detected was 1,900 pCi/kg dry with an average concentration of 700 pCi/kg dry.

Naturally occurring Ac-228 was detected in all four indicator location samples at concentrations ranging from 870 to 1,305 pCi/kg dry with an average concentration of 1,035 pCi/kg dry, and in both of the control location samples at concentrations ranging from 1,119 to 1,438 pCi/kg dry with an average concentration of 1,279 pCi/kg dry. Preoperational data is not available for comparison. (Table C-12, Appendix C)

Naturally occurring Th-228 was detected in all of the four indicator location samples at concentrations ranging from 953 to 1,111 pCi/kg dry with an average concentration of 1,020 pCi/kg dry, and in both of the control location samples at concentrations ranging from 1,107 and 1,143 pCi/kg dry with an average concentration of 1,125 pCi/kg dry. The maximum preoperational level detected was 3,200 pCi/kg dry with an average concentration of 1,300 pCi/kg dry.

All other gamma emitters were less than the LLD.

E. Land Use Census SYNOPSIS OF 2019 LAND USE CENSUS Applied Ecoscience, Inc. conducted a Land Use Census during the 2019 growing season around SSES to comply with the ODCM. The purpose of the survey was to document the nearest milk animal, residence and garden greater than 50 m2 (approximately 500 ft2) producing broad leaf vegetation within a distance of 8 km (approximately 5 miles) in each of the 16 meteorological sectors surrounding the SSES.

Distance in Miles from the SUSQUEHANNA NUCLEAR Reactor Buildings Nearest Nearest Nearest Residence Garden Dairy Farm Meteorological Sept, 2019 Sept, 2019 Sept, 2019 Sector miles miles miles 1 N 1.3 3.2 >5.0 2 NNE 1.0 2.3 a,c,e >5.0 3 NE 0.9 2.7 >5.0 4 ENE 2.1 2.4 a,c >5.0 5 E 1.4 4.9 4.5 d 6 ESE 0.5 3.1 >5.0 7 SE 0.6 0.6 >5.0 8 SSE 0.7 2.9 >5.0 9 S 1.0 3.5 >5.0 10 SSW 0.9 1.3 a,c >5.0 d 11 SW 1.5 1.9 >5.0 12 WSW 1.3 1.3 1.7 13 W 1.2 3.2 5.0 14 WNW 1.1 1.9 >5.0 15 NW 0.8 2.3 a,c >5.0 16 NNW 0.7 4.0 >5.0 a Chickens raised for consumption at this location b Ducks raised for consumption at this location c Eggs consumed from chickens at this location d Fruits/vegetables raised for consumption at this location e Beef cattle raised for consumption at this location f Rabbits raised for consumption at this location.

The 2019 Land Use Census results are summarized in the above table.

V. Annotations to Previous AREOR There are no annotations to the previous AREOR.

VI. Conclusions The Radiological Environmental Monitoring Program for SSES was conducted during 2019 in accordance with the SSES TRM and ODCM. The LLD values required by the TRM and ODCM were achieved for this reporting period (See Appendix A and Appendix C). The objectives of the program were also met during this period. The data collected assists in demonstrating that SSES was operated in compliance with TRM and ODCM requirements.

The concentration of radioactive material in the environment that could be attributable to SSES operations was only a small fraction of the concentration of naturally occurring and man-made radioactivity. Since these results were comparable to the results obtained during the preoperational phase of the program, which ran from 1972 to 1982, and with results collected since commercial operation, it is concluded that operation of the SSES had no significant radiological impact on the health and safety of the public or the environment.

From the results obtained, it can be concluded that the levels and fluctuations of radioactivity in environmental samples were as expected for the environment surrounding the SSES.

VII. References

[1] Annual Radiological Environmental Operating Report, January 1 to December 31, 2019, prepared by Teledyne Brown Engineering, Knoxville TN.

[2] Final Safety Analysis Report

[3] Final Environmental Statement

[4] Susquehanna Steam Electric Station, 2019 Land Use Census. Prepared for Susquehanna Nuclear, LLC, Berwick, PA. December 2019. Applied Ecoscience, Inc. Berwick, PA.

[5] Google Earth. 2016. Website: http://earth.google.com.

[6] Pennsylvania Department of Transportation. 1990. Columbia County General Highway Map. PA DOT, Harrisburg, PA.

[7] Pennsylvania Department of Transportation. 1990. Luzerne County General Highway Map. PA DOT, Harrisburg, PA.

[8] Susquehanna Nuclear, LLC. 2015. Radiological Environmental Monitoring Program, ODCM-QA-008, Rev. 18.

[9] Susquehanna Steam Electric Station, 5-mile radius aerial photograph, REMPE-182244-0. Susquehanna Nuclear, Berwick, PA

[10] United States Geological Survey. 1976. Berwick Quadrangle Topographic Map. 7.5 minute series. USGS, Reston, VA.

[11] United States Geological Survey. 1977. Sybertsville Quadrangle Topographic Map. 7.5 minute series. USGS, Reston, VA.

[12] United States Nuclear Regulatory Commission. An Acceptable Radiological Environmental Monitoring Program. Radiological Assessment Branch Technical Position. November 1979, Revision 1. USNRC, Washington, DC.

[13] Susquehanna Nuclear, Engineering Study, EC-ENVR-1012 (Revision 2, February 2013), Interpretation of Environmental Direct Radiation Results.

[14] Susquehanna Nuclear, Tritium Release REMP Calculation (RETDAS)

V.3.6.6) - March 2017.

[15] NCRP Report No. 160, Ionizing Radiation Exposure of the Population of the United States, (2009).

APPENDIX A PROGRAM

SUMMARY

A-1

TABLE A

SUMMARY

OF DATA FOR SSES OPERATIONAL RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM NAME OF FACILITY: SUSQUEHANNA STEAM ELECTRIC STATION LOCATION OF FACILITY: LUZERNE COUNTY, PENNSYLVANIA Reporting Period: December 28, 2018 to January 01, 2020 ANALYSIS AND LOWER LIMIT NUMBER OF MEDIUM OR PATHWAY TOTAL NUMBER OF ALL INDICATOR LOCATIONS LOCATION WITH HIGHEST MEAN CONTROL LOCATION NONROUTINE SAMPLED OF ANALYSIS DETECTION MEAN (3) NAME MEAN (3) MEAN (3) REPORTED (UNIT OF MEASUREMENT) PERFORMED (1) (LLD) (2) RANGE DISTANCE AND DIRECTION RANGE RANGE MEASURMENTS (

Air Particulates GR-B 364 10 1.264E+01 (312/312) 12E1 1.308E+01 (52/52) 1.213E+01 (52/52) 0 (E-3 pCi/m3) (6.800E+00 - 2.350E+01) 4.7 MILES WSW (7.280E+00 - 2.350E+01) (6.270E+00 - 2.060E+01)

GAMMA 28 BE-7 28 N/A 1.139E+02 (24/24) 13S6 1.236E+02 (4/4) 1.081E+02 (4/4) 0 (7.720E+01 - 1.604E+02) 0.4 MILES W (8.970E+01 - 1.604E+02) (9.277E+01 - 1.182E+02)

K-40 28 N/A <MDC (0/24) <MDC <MDC (0/4) 0 CS-134 28 50 <MDC (0/24) <MDC <MDC (0/4) 0 CS-137 28 60 <MDC (0/24) <MDC <MDC (0/4) 0 Charcoal GAMMA 364 (E-3 pCi/m3) I-131 364 70 <MDC (0/312) <MDC <MDC (0/52) 0 Ambient Radiation OSLD 228 N/A 1.677E+01 (208/208) 9S2 3.554E+01 (4/4) 1.492E+01 (20/20) 0 (mR/std. qtr.) (9.777E+00 - 4.188E+01) 0.2 MILES S (2.562E+01 - 4.188E+01) (1.013E+01 - 1.848E+01)

Milk I-131 60 1 <MDC (0/40) <MDC <MDC (0/20) 0 (pCi/Liter)

GAMMA 60 K-40 60 N/A 1.277E+03 (40/40) 10G1 1.330E+03 (20/20) 1.330E+03 (20/20) 0 (1.042E+03 - 1.504E+03) 14 MILES SSW (1.080E+03 - 1.463E+03) (1.080E+03 - 1.463E+03)

CS-134 60 15 <MDC (0/40) <MDC <MDC (0/20) 0 A-2

TABLE A

SUMMARY

OF DATA FOR SSES OPERATIONAL RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM NAME OF FACILITY: SUSQUEHANNA STEAM ELECTRIC STATION LOCATION OF FACILITY: LUZERNE COUNTY, PENNSYLVANIA Reporting Period: December 28, 2018 to January 01, 2020 ANALYSIS AND LOWER LIMIT NUMBER OF MEDIUM OR PATHWAY TOTAL NUMBER OF ALL INDICATOR LOCATIONS LOCATION WITH HIGHEST MEAN CONTROL LOCATION NONROUTINE SAMPLED OF ANALYSIS DETECTION MEAN (3) NAME MEAN (3) MEAN (3) REPORTED (UNIT OF MEASUREMENT) PERFORMED (1) (LLD) (2) RANGE DISTANCE AND DIRECTION RANGE RANGE MEASURMENTS (

Milk (cont'd) CS-137 60 18 <MDC (0/40) <MDC <MDC (0/20) 0 (pCi/Liter)

BA-140 60 60 <MDC (0/40) <MDC <MDC (0/20) 0 LA-140 60 15 <MDC (0/40) <MDC <MDC (0/20) 0 TH-228 60 N/A <MDC (0/40) <MDC <MDC (0/20) 0 Ground Water H-3 40 2000 2.091E+02 (12/36) 1S3 2.525E+02 (4/4) 1.635E+02 (2/4) 0 (pCi/Liter) (1.540E+02 - 3.430E+02) 0.1 MILES N (1.540E+02 - 3.430E+02) ( 1.500E+02 - 1.770E+02)

GAMMA 40 K-40 N/A <MDC (0/36) <MDC <MDC (0/4) 0 MN-54 40 15 <MDC (0/36) <MDC <MDC (0/4) 0 CO-58 40 15 <MDC (0/36) <MDC <MDC (0/4) 0 FE-59 40 30 <MDC (0/36) <MDC <MDC (0/4) 0 CO-60 40 15 <MDC (0/36) <MDC <MDC (0/4) 0 A-3

TABLE A

SUMMARY

OF DATA FOR SSES OPERATIONAL RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM NAME OF FACILITY: SUSQUEHANNA STEAM ELECTRIC STATION LOCATION OF FACILITY: LUZERNE COUNTY, PENNSYLVANIA Reporting Period: December 28, 2018 to January 01, 2020 ANALYSIS AND LOWER LIMIT NUMBER OF MEDIUM OR PATHWAY TOTAL NUMBER OF ALL INDICATOR LOCATIONS LOCATION WITH HIGHEST MEAN CONTROL LOCATION NONROUTINE SAMPLED OF ANALYSIS DETECTION MEAN (3) NAME MEAN (3) MEAN (3) REPORTED (UNIT OF MEASUREMENT) PERFORMED (1) (LLD) (2) RANGE DISTANCE AND DIRECTION RANGE RANGE MEASURMENTS (

Ground Water (cont'd) ZN-65 40 30 <MDC (0/36) <MDC <MDC (0/4) 0 (pCi/Liter)

NB-95 40 15 <MDC (0/36) <MDC <MDC (0/4) 0 ZR-95 40 30 <MDC (0/36) <MDC <MDC (0/4) 0 I-131 40 15 <MDC (0/36) <MDC <MDC (0/4) 0 CS-134 40 15 <MDC (0/36) <MDC <MDC (0/4) 0 CS-137 40 18 <MDC (0/36) <MDC <MDC (0/4) 0 BA-140 40 60 <MDC (0/36) <MDC <MDC (0/4) 0 LA-140 40 15 <MDC (0/36) <MDC <MDC (0/4) 0 TH-228 40 N/A <MDC (0/36) <MDC <MDC (0/4) 0 Drinking Water GR-B 13 4 2.558E+00 (5/13) 12H2 2.558E+00 (5/13) N/A 0 (pCi/Liter) (2.380E+00 - 2.760E+00) 26 MILES WSW (2.380E+00 - 2.760E+00)

H-3 13 2000 <MDC (0/12) <MDC N/A 0 A-4

TABLE A

SUMMARY

OF DATA FOR SSES OPERATIONAL RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM NAME OF FACILITY: SUSQUEHANNA STEAM ELECTRIC STATION LOCATION OF FACILITY: LUZERNE COUNTY, PENNSYLVANIA Reporting Period: December 28, 2018 to January 01, 2020 ANALYSIS AND LOWER LIMIT NUMBER OF MEDIUM OR PATHWAY TOTAL NUMBER OF ALL INDICATOR LOCATIONS LOCATION WITH HIGHEST MEAN CONTROL LOCATION NONROUTINE SAMPLED OF ANALYSIS DETECTION MEAN (3) NAME MEAN (3) MEAN (3) REPORTED (UNIT OF MEASUREMENT) PERFORMED (1) (LLD) (2) RANGE DISTANCE AND DIRECTION RANGE RANGE MEASURMENTS (

Drinking Water (cont'd) GAMMA 13 (pCi/Liter) K-40 13 N/A <MDC (0/12) <MDC N/A 0 MN-54 13 15 <MDC (0/12) <MDC N/A 0 CO-58 13 15 <MDC (0/12) <MDC N/A 0 FE-59 13 30 <MDC (0/12) <MDC N/A 0 CO-60 13 15 <MDC (0/12) <MDC N/A 0 ZN-65 13 30 <MDC (0/12) <MDC N/A 0 NB-95 13 15 <MDC (0/12) <MDC N/A 0 ZR-95 13 30 <MDC (0/12) <MDC N/A 0 I-131 13 15 <MDC (0/12) <MDC N/A 0 CS-134 13 15 <MDC (0/12) <MDC N/A 0 A-5

TABLE A

SUMMARY

OF DATA FOR SSES OPERATIONAL RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM NAME OF FACILITY: SUSQUEHANNA STEAM ELECTRIC STATION LOCATION OF FACILITY: LUZERNE COUNTY, PENNSYLVANIA Reporting Period: December 28, 2018 to January 01, 2020 ANALYSIS AND LOWER LIMIT NUMBER OF MEDIUM OR PATHWAY TOTAL NUMBER OF ALL INDICATOR LOCATIONS LOCATION WITH HIGHEST MEAN CONTROL LOCATION NONROUTINE SAMPLED OF ANALYSIS DETECTION MEAN (3) NAME MEAN (3) MEAN (3) REPORTED (UNIT OF MEASUREMENT) PERFORMED (1) (LLD) (2) RANGE DISTANCE AND DIRECTION RANGE RANGE MEASURMENTS (

Drinking Water (cont'd) CS-137 13 18 <MDC (0/12) <MDC N/A 0 (pCi/Liter)

BA-140 13 60 <MDC (0/12) <MDC N/A 0 LA-140 13 15 <MDC (0/12) <MDC N/A 0 Food/Garden Crops GAMMA 13 (pCi/kg wet) BE-7 13 N/A 5.942E+02 (4/13) 11S6 5.942E+02 (4/10) N/A 0 (3.524E+02 - 9.583E+02) 0.5 MILES SW (3.524E+02 - 9.583E+02)

K-40 13 N/A 5.325E+03 (13/13) 11D1 7.743E+03 (3/3) N/A 0 (2.857E+03 - 1.741E+04) 3.3 MILES SW (2.857E+03 - 1.741E+04)

MN-54 13 N/A <MDC (0/13) <MDC N/A 0 CO-58 13 N/A <MDC (0/13) <MDC N/A 0 FE-59 13 N/A <MDC (0/13) <MDC N/A 0 CO-60 13 N/A <MDC (0/13) <MDC N/A 0 ZN-65 13 N/A <MDC (0/13) <MDC N/A 0 A-6

TABLE A

SUMMARY

OF DATA FOR SSES OPERATIONAL RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM NAME OF FACILITY: SUSQUEHANNA STEAM ELECTRIC STATION LOCATION OF FACILITY: LUZERNE COUNTY, PENNSYLVANIA Reporting Period: December 28, 2018 to January 01, 2020 ANALYSIS AND LOWER LIMIT NUMBER OF MEDIUM OR PATHWAY TOTAL NUMBER OF ALL INDICATOR LOCATIONS LOCATION WITH HIGHEST MEAN CONTROL LOCATION NONROUTINE SAMPLED OF ANALYSIS DETECTION MEAN (3) NAME MEAN (3) MEAN (3) REPORTED (UNIT OF MEASUREMENT) PERFORMED (1) (LLD) (2) RANGE DISTANCE AND DIRECTION RANGE RANGE MEASURMENTS (

Food/Garden Crops (cont'd) NB-95 13 N/A <MDC (0/13) <MDC N/A 0 (pCi/kg wet)

ZR-95 13 N/A <MDC (0/13) <MDC N/A 0 I-131 13 60 <MDC (0/13) <MDC N/A 0 CS-134 13 60 <MDC (0/13) <MDC N/A 0 CS-137 13 80 <MDC (0/13) <MDC N/A 0 BA-140 13 N/A <MDC (0/13) <MDC N/A 0 LA-140 13 N/A <MDC (0/13) <MDC N/A 0 AC-228 13 N/A <MDC (0/13) <MDC N/A 0 TH-228 13 N/A <MDC (0/13) <MDC N/A 0 A-7

TABLE A

SUMMARY

OF DATA FOR SSES OPERATIONAL RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM NAME OF FACILITY: SUSQUEHANNA STEAM ELECTRIC STATION LOCATION OF FACILITY: LUZERNE COUNTY, PENNSYLVANIA Reporting Period: December 28, 2018 to January 01, 2020 ANALYSIS AND LOWER LIMIT NUMBER OF MEDIUM OR PATHWAY TOTAL NUMBER OF ALL INDICATOR LOCATIONS LOCATION WITH HIGHEST MEAN CONTROL LOCATION NONROUTINE SAMPLED OF ANALYSIS DETECTION MEAN (3) NAME MEAN (3) MEAN (3) REPORTED (UNIT OF MEASUREMENT) PERFORMED (1) (LLD) (2) RANGE DISTANCE AND DIRECTION RANGE RANGE MEASURMENTS (

Surface Water H-3 37 2000 8.465E+02 (12/25) 2S7 8.465E+02 (12/13) <MDC (0/12) 0 (pCi/Liter) (1.640E+02 - 3.660E+03) 0.1 MILES NNE (1.640E+02 - 3.660E+03)

GAMMA 37 K-40 37 N/A <MDC (0/25) <MDC <MDC (0/12) 0 MN-54 37 15 <MDC (0/25) <MDC <MDC (0/12) 0 CO-58 37 15 <MDC (0/25) <MDC <MDC (0/12) 0 FE-59 37 30 <MDC (0/25) <MDC <MDC (0/12) 0 CO-60 37 15 <MDC (0/25) <MDC <MDC (0/12) 0 ZN-65 37 30 <MDC (0/25) <MDC <MDC (0/12) 0 NB-95 37 15 <MDC (0/25) <MDC <MDC (0/12) 0 ZR-95 37 30 <MDC (0/25) <MDC <MDC (0/12) 0 I-131 37 15 <MDC (0/25) <MDC <MDC (0/12) 0 A-8

TABLE A

SUMMARY

OF DATA FOR SSES OPERATIONAL RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM NAME OF FACILITY: SUSQUEHANNA STEAM ELECTRIC STATION LOCATION OF FACILITY: LUZERNE COUNTY, PENNSYLVANIA Reporting Period: December 28, 2018 to January 01, 2020 ANALYSIS AND LOWER LIMIT NUMBER OF MEDIUM OR PATHWAY TOTAL NUMBER OF ALL INDICATOR LOCATIONS LOCATION WITH HIGHEST MEAN CONTROL LOCATION NONROUTINE SAMPLED OF ANALYSIS DETECTION MEAN (3) NAME MEAN (3) MEAN (3) REPORTED (UNIT OF MEASUREMENT) PERFORMED (1) (LLD) (2) RANGE DISTANCE AND DIRECTION RANGE RANGE MEASURMENTS (

Surface Water (cont'd) CS-134 37 15 <MDC (0/25) <MDC <MDC (0/12) 0 (pCi/Liter)

CS-137 37 18 <MDC (0/25) <MDC <MDC (0/12) 0 BA-140 37 60 <MDC (0/25) <MDC <MDC (0/12) 0 LA-140 37 15 <MDC (0/25) <MDC <MDC (0/12) 0 TH-228 37 N/A 7.982E+00 (1/25) 6S5 7.982E+00 (1/12) <MDC (0/12) 0 (7.982E+00) 0.9 MILES ESE (7.982E+00)

Fish GAMMA 14 (pCi/kg wet) K-40 14 N/A 3.946E+03 (8/8) LTAW 4.086E+03 (2/2) 3.681E+03 (6/6) 0 (3.354E+03 - 4.393E+03) 0.7 MILES NE-ESE (3.953E+03 - 4.219E+03) (2.889E+03 - 4.485E+03)

MN-54 14 130 <MDC (0/8) <MDC <MDC (0/6) 0 CO-58 14 130 <MDC (0/8) <MDC <MDC (0/6) 0 FE-59 14 260 <MDC (0/8) <MDC <MDC (0/6) 0 CO-60 14 130 <MDC (0/8) <MDC <MDC (0/6) 0 A-9

TABLE A

SUMMARY

OF DATA FOR SSES OPERATIONAL RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM NAME OF FACILITY: SUSQUEHANNA STEAM ELECTRIC STATION LOCATION OF FACILITY: LUZERNE COUNTY, PENNSYLVANIA Reporting Period: December 28, 2018 to January 01, 2020 ANALYSIS AND LOWER LIMIT NUMBER OF MEDIUM OR PATHWAY TOTAL NUMBER OF ALL INDICATOR LOCATIONS LOCATION WITH HIGHEST MEAN CONTROL LOCATION NONROUTINE SAMPLED OF ANALYSIS DETECTION MEAN (3) NAME MEAN (3) MEAN (3) REPORTED (UNIT OF MEASUREMENT) PERFORMED (1) (LLD) (2) RANGE DISTANCE AND DIRECTION RANGE RANGE MEASURMENTS (

Fish (cont'd) ZN-65 14 260 <MDC (0/8) <MDC <MDC (0/6) 0 (pCi/kg wet)

CS-134 14 130 <MDC (0/8) <MDC <MDC (0/6) 0 CS-137 14 150 <MDC (0/8) <MDC <MDC (0/6) 0 Sediment GAMMA 6 (pCi/kg dry) K-40 6 N/A 1.094E+04 (4/4) 2B 1.435E+04 (2/2) 1.435E+04 (2/2) 0 (8.495E+03 - 1.351E+04) 1.6 MILES NNE (1.259E+04 - 1.610E+04) (1.259E+04 - 1.610E+04)

CS-134 6 150 <MDC (0/4) <MDC <MDC (0/2) 0 CS-137 6 180 <MDC (0/4) <MDC <MDC (0/2) 0 RA-226 6 N/A <MDC (0/4) <MDC <MDC (0/2) 0 AC-228 6 N/A 1.035E+03 (4/4) 2B 1.279E+03 (2/2) 1.279E+03 (2/2)

(8.695E+02 - 1.305E+03) 1.6 MILES NNE (1.119E+03 - 1.438E+03) (1.119E+03 - 1.438E+03) 0 TH-228 6 N/A 1.020E+03 (4/4) 2B 1.125E+03 (2/2) 1.125E+03 (2/2)

(9.525E+02 - 1.111E+03) 1.6 MILES NNE (1.107E+03 - 1.143E+03) (1.107E+03 - 1.143E+03) 0

1. The total number of analyses does not include duplicates, splits or repeated analyses.

2. The Technical Requirement LLDs are shown when applicable.

3. The mean and range are based on all results above MDC. The ratio indicated in parentheses is the total number of results used to calculate the mean to the total number of samples.

4. USNRC Reporting Levels are specified in the Technical Requirements (i.e., when Reporting Levels in Technical Requirements are exceeded).

A-10

APPENDIX B SAMPLE DESIGNATION AND LOCATIONS B-1

SAMPLE DESIGNATION All distances from the SSES to monitoring locations are measured from the standby gas treatment vent at 44200/N34117 (Pa. Grid System). The location codes are based on both distance and direction from the SSES. The letters in the location codes indicate if the monitoring locations are on site (within the site boundary) or, if they are not on site, the approximate distances of the location from the SSES as described below:

S = On site E = 4 - 5 miles A = < 1 mile F = 5 - 10 miles B = 1 - 2 miles G = 10 - 20 miles C = 2 - 3 miles H = > 20 miles D = 3 - 4 miles The numbers preceding the letters in the location codes provide the direction of the monitoring locations from the SSES by indicating the sectors in which they are located. A total number of 16 sectors (numbered one through 16) equally divide an imaginary circle on a map of the SSES and its vicinity, with the SSES at the center of the circle. The middle of sector one is directed due North (N). Moving clockwise from sector one, the sector immediately adjacent to sector one is sector two, the middle of which is directed due north, north east (NNE). Continuing to move clockwise the sector number increases to 16, which is the north northwest sector (NNW).

B-2

TABLE B-1 SAMPLING LOCATIONS Specific information about the individual sampling locations are given in Table B-1. Maps B-1 through B-6 show the locations of sampling stations with respect to the Site. A Portable Global Positioning System (GPS) was used to provide the coordinates of sampling locations.

STATION CODE STATION LOCATION LATITUDINAL LONGITUDINAL SAMPLE TYPE LESS THAN ONE MILE FROM THE SSES DEG. DEG.

2S7 0.1 mi.NNE 41.093540 -76.144773 Surface water 6S5 0.9 mi.ESE; 41.084639 -76.130642 Surface water 6S6 ** 0.8 mi.ESE; 41.088115 -76.131637 Surface water LTAW 0.7 mi.NE-ESE; 41.098356 -76.135401 Fish 10S3 0.6 mi. SSW; 41.085264 -76.152128 Air 12S1 0.4 mi.WSW; 41.088436 -76.154314 Air 13S6 0.4 mi.W; 41.091771 -76.153869 Air 3S2 0.5 mi NE; 41.095716 -76.140207 Air 2S8 0.1 mi.NNE; 41.094991 -76..044207 Ground water 6S11A 0.4 mi.ESE; 41.083448 -76.133412 Ground water 6S12 0.8 mi.ESE; 41.083411 -76.116935 Ground water 7S11 0.3 mi.SE; 41.083527 -76.133513 Ground water 1S3 0.1 mi N; 41.093640 -76.146076 Ground water 4S8 0.1 mi.ENE; 41.092306 -76.144283 Ground water 4S9 0.3 mi.E; 41.093369 -76.141644 Ground water 8S4 0.1 mi.SSE; 41.091424 -76.145531 Ground water 7S10 0.3 mi.SE; 41.089736 -76.142783 Ground water 13S7 0.2 mi.W; 41.091236 -76.149647 Ground water 11S6 0.5 mi.SW; 41.085305 -76.152022 Broadleaf Site 1 0.1 mi.ESE; 41.092275 -76.145022 Precipitation Site 2 0.1 mi.SSE; 41.091309 -76.145708 Precipitation Site 3 0.1 mi.WSW; 41.091243 -76.147345 Precipitation 0.1 mi.NW; Site 4 41.093321 -76.147316 Precipitation

- Control Location B-3

TABLE B-1 (contd)

SAMPLING LOCATIONS STATION CODE STATION LOCATION LATITUDINAL LONGITUDINAL SAMPLE TYPE FROM ONE to FIVE MILES FROM THE SSES DEG. DEG.

IND 0.9 mi.ESE; 41.085141 -76.130174 Fish IND 1.4 mi.ESE; 41.075618 -76.132682 Fish 2B ** 1.6 mi.NNE; 41.112441 -76.134758 Sediment 7B 1.2 mi.SE; 41.078924 -76.131548 Sediment 9B1 1.3 mi. SSW; 41.085264 -76.152128 Air 12E1 4.7 mi.WSW; 41.072418 -76.230554 Air 5E2 4.5 mi.E; 41.085184 -76.061099 Milk 13E3 5.0 mi.W; 41.100259 -76.241102 Milk 11D1 3.3 mi.SW; 41.055212 -76.186797 Food Products

- Control Location GREATER THAN FIVE MILES FROM THE SSES 12H2 26 mi.WSW; 40.947192 -76.604524 Drinking water 2H ** 30 mi.NNE; 41.459508 -75.853096 Fish 12F 6.9 mi.WSW; 41.041323 -76.255396 Sediment 8G1 ** 12 mi.SSE; 40.928886 -76.055092 Air 10G1 ** 14 mi.SSW; 40.934847 -76.284449 Milk B-4

TABLE B-1 (contd)

SAMPLING LOCATIONS STATION CODE STATION LOCATION LATITUDINAL LONGITUDINAL SAMPLE TYPE OSLD LOCATIONS LESS THAN ONE MILE FROM THE SSES DEG. DEG.

1S2 0.2 mi.N; 41.09566 -76.146121 OSLD 2S2 0.9 mi.NNE; 41.10207 -76.141192 OSLD 2S3 0.2 mi.NNE; 41.09486 -76.144101 OSLD 3S2 0.5 mi.NE; 41.09574 -76.140086 OSLD 3S3 0.9 mi.NE; 41.10183 -76.133127 OSLD 4S3 0.2 mi.ENE; 41.09322 -76.141934 OSLD 4S6 0.7 mi.ENE; 41.09687 -76.133807 OSLD 5S4 0.8 mi.E; 41.09286 -76.131604 OSLD 5S7 0.3 mi.E; 41.09199 -76.141165 OSLD 6S4 0.2 mi.ESE; 41.09132 -76.142616 OSLD 6S9 0.2 mi.ESE; 41.09067 -76.142966 OSLD 7S6 0.2 mi.SE; 41.08972 -76.14359 OSLD 7S7 0.4 mi.SE; 41.08745 -76.142033 OSLD 8S2 0.2 mi.SSE; 41.08907 -76.14437 OSLD 9S2 0.2 mi.S; 41.08952 -76.14322 OSLD 10S1 0.4 mi.SSW; 41.08663 -76.150082 OSLD 10S2 0.2 mi.SSW; 41.08894 -76.147881 OSLD 11S7 0.4 mi.SWN; 41.08832 -76.15297 OSLD 12S1 0.4 mi.WSW; 41.0887 -76.154112 OSLD 12S3 0.4 mi.WSW; 41.08968 -76.153192 OSLD 13S2 0.4 mi.W; 41.09198 -76.153166 OSLD 13S5 0.4 mi.W; 41.09179 -76.153167 OSLD 13S6 0.4 mi.W; 41.09177 -76.154073 OSLD 14S5 0.5 mi.WNW; 41.09503 -76.153787 OSLD 15S5 0.4 mi.NW; 41.09576 -76.15103 OSLD 16S1 0.3 mi.NNW; 41.09611 -76.147388 OSLD 16S2 0.3 mi.NNW; 41.09599 -76.148922 OSLD 6A4

0.6 mi.ESE; 41.08791 -76.136795 OSLD B-5

TABLE B-1 (contd)

SAMPLING LOCATIONS STATION CODE STATION LOCATION LATITUDINAL LONGITUDINAL SAMPLE TYPE LESS THAN ONE MILE FROM THE SSES DEG. DEG.

8A3 0.9 mi.SSE; 41.07982 -76.1139078 OSLD 15A3

0.9 mi.NW; 41.10003 -76.1585 OSLD 16A2

0.8 mi.NNW; 41.1025 -76.151595 OSLD FROM ONE to FIVE MILES FROM THE SSES 12S7 1.1 mi.WSW; 41.08621 -76.165914 OSLD 8B2

1.4 mi.SSE; 41.07483 -76.130724 OSLD 9B1 1.3 mi.S; 41.07356 -76.147874 OSLD 10B3

1.7 mi.SSW; 41.07064 -76.156646 OSLD 1D5 4.0 mi.N; 41.14936 -76.144346 OSLD 8D3 4.0 mi.SSE; 41.03824 -76.121683 OSLD 9D4 3.6 mi.S; 41.04015 -76.144529 OSLD 10D1 3.0 mi.SSW; 41.05446 -76.175026 OSLD 12D2 3.7 mi.WSW; 41.07363 -76.213306 OSLD 14D1 3.6 mi.WNW; 41.10706 -76.211891 OSLD 3E1 4.7 mi NE; 41.13953 -76.082398 OSLD 4E2 4.7 mi.ENE; 41.12157 -76.064115 OSLD 5E2 4.5 mi. E; 41.08539 -76.060486 OSLD 6E1 4.7 mi.ESE; 41.07275 -76.059529 OSLD 7E1 4.2 mi.SE; 41.04891 -76.090309 OSLD 11E1 4.7 mi. SW; 41.05188 -76.218713 OSLD 12E1

4.7 mi.WSW; 41.0725 -76.230331 OSLD 13E4 4.1 mi.W; 41.08962 -76.223726 OSLD

Special Interest Area (other than controls)

B-6

TABLE B-1 (contd)

SAMPLING LOCATIONS STATION CODE STATION LOCATION LATITUDINAL LONGITUDINAL SAMPLE TYPE GREATER THAN FIVE MILES FROM THE SSES DEG. DEG.

2F1 5.9 mi.NNE; 41.16796 -76.09146 OSLD 15F1 5.4 mi.NW; 41.15595 -76.202506 OSLD 16F1 7.8 mi.NNW; 41.18985 -76.229283 OSLD 3G4 ** 17 mi.NE; 41.23431 -76.869061 OSLD 4G1 ** 14 mi.ENE; 41.13898 -75.885121 OSLD 7G1 ** 14 mi.SE; 40.94636 -76.974184 OSLD 12G1 ** 15 mi.WSW; 41.0262 -76.411566 OSLD 12G4 ** 10 mi. WSW; 40.03868 -76.327731 OSLD

Special Interest Area (other than controls)

- Control Location B-7

TABLE B-2 SUSQUEHANNA STEAM ELECTRIC STATION RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM Sample Analysis Sampling Method Collection Procedure Number Analytical Procedure Number Medium Ambient Dosimeter Quarterly SSES, HP-TP-205 Landauer Procedure L313, Inlight Dosimeter Analysis Radiation Air Gross Beta Weekly Applied Ecoscience, Appendix 2 TBE-2008 Gross Alpha and/or Gross Beta Activity in Various Matrices.

Air I-131 Weekly Applied Ecoscience, Appendix 2 TBE-2012 Radioiodine in Various Matrices Air Gamma Quarterly Applied Ecoscience, Appendix 2 TBE-2007 Gamma Emitting Radioisotope Analysis Drinking Water Gross Beta Monthly Applied Ecoscience, Appendix 5 TBE-2008 Gross Alpha and/or Gross Beta Activity in Various Matrices.

Surface & Tritium Monthly Applied Ecoscience, Appendix 3, 4, 5, 6, & 7 TBE-2010 Tritium and Carbon-14 Analysis by Liquid Drinking Water Scintillation.

Surface & Gamma Monthly Applied Ecoscience, Appendix 3, 4, 5, 6, & 7 TBE-2007 Gamma Emitting Radioisotope Analysis.

Drinking Water Ground Water Tritium Quarterly Applied Ecoscience, Appendix 8 TBE-2010 Tritium and Carbon-14 Analysis by Liquid Scintillation Ground Water Gamma Quarterly Applied Ecoscience, Appendix 8 TBE-2007 Gamma Emitting Radioisotope Analysis B-8

TABLE B-2 (cont'd)

SUSQUEHANNA STEAM ELECTRIC STATION RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM Sample Analysis Sampling Method Collection Procedure Number Analytical Procedure Number Medium Precipitation Tritium Monthly (Apr - Nov) / Applied Ecoscience, Appendix 10 TBE-2010 Tritium and Carbon-14 Analysis by Liquid Quarterly Scintillation Milk Gamma Monthly/Bi-Weekly Applied Ecoscience, Appendix 9 TBE-2007 Gamma Emitting Radioisotope Analysis Milk I-131 Monthly/Bi-Weekly Applied Ecoscience, Appendix 9 TBE-2012 Radioiodine in Various Matrices Fish Gamma Semi-Annually Applied Ecoscience, Appendix 11 TBE-2007 Gamma Emitting Radioisotope Analysis (Spring/Fall)

Sediment Gamma Semi-Annually Applied Ecoscience, Appendix 12 TBE-2007 Gamma Emitting Radioisotope Analysis (Spring/Fall)

Fruits & Gamma In Season (When Applied Ecoscience, Appendix 13 TBE-2007 Gamma Emitting Radioisotope Analysis Vegetables available) Applied Ecoscience, Appendix 15 B-9

MAP 8-1 Direct Radiation Monitoring Locations Within One Mile B-10

MAP B-2 Direct Radiation Monitoring Locations From One to Five Miles ipo

,l**

I

\. .......

- - . ~--\'*-**

- .,~

J .., ~

~--.J B-11

MAP 8-3 Direct Radiation Monitoring Locations Greater Than Five Miles B-12

MAP B-4 Environmental Sampling Locations Within One Mile B-13

MAP 8-5 Environmental Sampling Locations From One to Five Miles B-14

MAP 8-6 Environmental Sampling Locations Greater Than Five Miles B-15

APPENDIX C DATA TABLES C-1

TABLE C-1 GROSS BETA ANALYSES OF AIR PARTICULATE FILTERS SUSQUEHANNA STEAM ELECTRIC STATION, 2019 Results in units of E-03 pCi/cu.m. +/- 2 sigma COLLECTION PERIOD 3S2 8G1 12E1 12S1 13S6 9B1 01/02/19 - 01/09/19 12 +/- 2 11 +/- 2 12 +/- 2 11 +/- 2 13 +/- 2 13 +/- 2 01/09/19 - 01/16/19 10 +/- 2 10 +/- 2 11 +/- 2 12 +/- 2 11 +/- 2 9 +/- 2 01/16/19 - 01/23/19 11 +/- 2 11 +/- 2 13 +/- 2 11 +/- 2 11 +/- 2 12 +/- 2 01/23/19 - 01/30/19 15 +/- 2 15 +/- 2 16 +/- 2 13 +/- 2 15 +/- 2 14 +/- 2 01/30/19 - 02/06/19 17 +/- 2 18 +/- 2 21 +/- 3 17 +/- 2 14 +/- 2 16 +/- 2 02/06/19 - 02/13/19 10 +/- 2 10 +/- 2 11 +/- 2 9 +/- 2 11 +/- 2 12 +/- 2 02/13/19 - 02/20/19 14 +/- 2 15 +/- 2 14 +/- 2 13 +/- 2 13 +/- 2 13 +/- 2 02/20/19 - 02/27/19 16 +/- 2 15 +/- 2 18 +/- 3 17 +/- 2 16 +/- 3 18 +/- 3 02/27/19 - 03/06/19 12 +/- 2 11 +/- 2 12 +/- 2 11 +/- 2 10 +/- 2 13 +/- 2 03/06/19 - 03/13/19 16 +/- 2 17 +/- 3 18 +/- 3 17 +/- 2 15 +/- 2 16 +/- 3 03/13/19 - 03/20/19 13 +/- 2 16 +/- 2 17 +/- 3 15 +/- 2 18 +/- 3 15 +/- 2 03/20/19 - 03/27/19 10 +/- 2 11 +/- 2 11 +/- 2 12 +/- 2 14 +/- 2 9 +/- 2 03/27/19 - 04/03/19 11 +/- 2 10 +/- 2 10 +/- 2 11 +/- 2 13 +/- 2 12 +/- 2 04/03/19 - 04/10/19 9 +/- 2 10 +/- 2 11 +/- 2 10 +/- 2 12 +/- 2 11 +/- 2 04/10/19 - 04/17/19 8 +/- 2 7 +/- 2 9 +/- 2 9 +/- 2 10 +/- 2 9 +/- 2 04/17/19 - 04/24/19 8 +/- 2 8 +/- 2 12 +/- 2 12 +/- 2 9 +/- 2 12 +/- 2 04/24/19 - 05/01/19 9 +/- 2 7 +/- 2 9 +/- 2 8 +/- 2 8 +/- 2 7 +/- 2 05/01/19 - 05/08/19 11 +/- 2 7 +/- 2 8 +/- 2 10 +/- 2 8 +/- 2 9 +/- 2 05/08/19 - 05/15/19 8 +/- 2 6 +/- 2 7 +/- 2 8 +/- 2 8 +/- 2 7 +/- 2 05/15/19 - 05/22/19 14 +/- 2 17 +/- 2 16 +/- 2 12 +/- 2 13 +/- 2 13 +/- 2 05/22/19 - 05/29/19 10 +/- 2 9 +/- 2 11 +/- 2 10 +/- 2 10 +/- 2 10 +/- 2 05/29/19 - 06/05/19 9 +/- 2 8 +/- 2 8 +/- 2 10 +/- 2 8 +/- 2 9 +/- 2 06/05/19 - 06/12/19 14 +/- 2 13 +/- 2 12 +/- 2 14 +/- 2 12 +/- 2 12 +/- 2 06/12/19 - 06/19/19 10 +/- 2 11 +/- 2 13 +/- 2 11 +/- 2 11 +/- 2 11 +/- 2 06/19/19 - 06/26/19 11 +/- 2 10 +/- 2 8 +/- 2 11 +/- 2 10 +/- 2 9 +/- 2 06/26/19 - 07/03/19 12 +/- 2 13 +/- 2 15 +/- 2 11 +/- 2 13 +/- 2 13 +/- 2 07/03/19 - 07/10/19 13 +/- 2 11 +/- 2 13 +/- 2 12 +/- 2 12 +/- 2 12 +/- 2 07/10/19 - 07/17/19 9 +/- 2 8 +/- 2 12 +/- 2 9 +/- 2 12 +/- 2 9 +/- 2 07/17/19 - 07/24/19 9 +/- 2 10 +/- 2 11 +/- 2 10 +/- 2 9 +/- 2 9 +/- 2 07/24/19 - 07/31/19 13 +/- 2 18 +/- 2 16 +/- 2 17 +/- 2 18 +/- 3 18 +/- 2 07/31/19 - 08/07/19 15 +/- 2 19 +/- 3 19 +/- 3 17 +/- 2 15 +/- 2 17 +/- 2 08/07/19 - 08/14/19 12 +/- 2 12 +/- 2 11 +/- 2 12 +/- 2 11 +/- 2 13 +/- 2 08/14/19 - 08/21/19 17 +/- 3 21 +/- 3 19 +/- 3 19 +/- 3 20 +/- 3 15 +/- 2 08/21/19 - 08/28/19 10 +/- 2 13 +/- 2 13 +/- 2 12 +/- 2 11 +/- 2 13 +/- 2 08/28/19 - 09/04/19 15 +/- 2 17 +/- 2 15 +/- 2 17 +/- 3 15 +/- 2 15 +/- 2 09/04/19 - 09/11/19 15 +/- 2 12 +/- 2 17 +/- 2 16 +/- 2 14 +/- 2 14 +/- 2 09/11/19 - 09/18/19 17 +/- 2 17 +/- 2 18 +/- 3 19 +/- 3 16 +/- 2 17 +/- 2 09/18/19 - 09/25/19 20 +/- 3 16 +/- 2 16 +/- 2 16 +/- 2 17 +/- 2 17 +/- 2 09/25/19 - 10/02/19 17 +/- 2 15 +/- 2 18 +/- 2 17 +/- 2 16 +/- 2 17 +/- 2 10/02/19 - 10/09/19 10 +/- 2 9 +/- 2 11 +/- 2 11 +/- 2 8 +/- 2 11 +/- 2 10/09/19 - 10/16/19 16 +/- 2 17 +/- 2 17 +/- 2 15 +/- 2 17 +/- 2 16 +/- 2 10/16/19 - 10/23/19 9 +/- 2 7 +/- 2 9 +/- 2 7 +/- 2 9 +/- 2 8 +/- 2 10/23/19 - 10/30/19 14 +/- 2 11 +/- 2 12 +/- 2 13 +/- 2 12 +/- 2 13 +/- 2 10/30/19 - 11/06/19 10 +/- 2 9 +/- 2 9 +/- 2 11 +/- 2 12 +/- 2 12 +/- 2 11/06/19 - 11/13/19 13 +/- 2 13 +/- 2 14 +/- 2 14 +/- 2 11 +/- 2 12 +/- 2 11/13/19 - 11/20/19 13 +/- 2 10 +/- 2 12 +/- 2 12 +/- 2 11 +/- 2 12 +/- 2 11/20/19 - 11/26/19 12 +/- 2 13 +/- 2 11 +/- 2 14 +/- 2 14 +/- 2 13 +/- 2 11/26/19 - 12/04/19 8 +/- 2 7 +/- 1 9 +/- 2 11 +/- 2 8 +/- 2 8 +/- 2 12/04/19 - 12/11/19 12 +/- 2 13 +/- 2 12 +/- 2 13 +/- 2 12 +/- 2 13 +/- 2 12/11/19 - 12/18/19 11 +/- 2 9 +/- 2 9 +/- 2 11 +/- 2 9 +/- 2 11 +/- 2 12/18/19 - 12/26/19 23 +/- 3 19 +/- 2 24 +/- 2 20 +/- 2 21 +/- 2 22 +/- 2 12/26/19 - 01/02/20 13 +/- 2 13 +/- 2 13 +/- 2 15 +/- 2 14 +/- 2 14 +/- 2 AVERAGE 12 +/- 7 12 +/- 7 13 +/- 7 13 +/- 6 13 +/- 6 13 +/- 6 C-2

TABLE C-1 GROSS BETA ANALYSES OF AIR PARTICULATE FILTERS SUSQUEHANNA STEAM ELECTRIC STATION, 2019 Results in units of E-03 pCi/cu.m. +/- 2 sigma COLLECTION PERIOD 10S3 01/02/19 - 01/09/19 15 +/- 2 01/09/19 - 01/16/19 9 +/- 2 01/16/19 - 01/23/19 11 +/- 2 01/23/19 - 01/30/19 16 +/- 2 01/30/19 - 02/06/19 16 +/- 2 02/06/19 - 02/13/19 11 +/- 2 02/13/19 - 02/20/19 15 +/- 2 02/20/19 - 02/27/19 17 +/- 2 02/27/19 - 03/06/19 14 +/- 2 03/06/19 - 03/13/19 17 +/- 2 03/13/19 - 03/20/19 15 +/- 2 03/20/19 - 03/27/19 11 +/- 2 03/27/19 - 04/03/19 13 +/- 2 04/03/19 - 04/10/19 11 +/- 2 04/10/19 - 04/17/19 10 +/- 3 04/17/19 - 04/24/19 12 +/- 2 04/24/19 - 05/01/19 8 +/- 2 05/01/19 - 05/08/19 10 +/- 2 05/08/19 - 05/15/19 8 +/- 2 05/15/19 - 05/22/19 13 +/- 2 05/22/19 - 05/29/19 10 +/- 2 05/29/19 - 06/05/19 8 +/- 2 06/05/19 - 06/12/19 13 +/- 2 06/12/19 - 06/19/19 11 +/- 2 06/19/19 - 06/26/19 12 +/- 2 06/26/19 - 07/03/19 14 +/- 2 07/03/19 - 07/10/19 12 +/- 2 07/10/19 - 07/17/19 10 +/- 2 07/17/19 - 07/24/19 8 +/- 2 07/24/19 - 07/31/19 19 +/- 3 07/31/19 - 08/07/19 17 +/- 2 08/07/19 - 08/14/19 12 +/- 2 08/14/19 - 08/21/19 17 +/- 3 08/21/19 - 08/28/19 13 +/- 2 08/28/19 - 09/04/19 14 +/- 2 09/04/19 - 09/11/19 14 +/- 2 09/11/19 - 09/18/19 18 +/- 3 09/18/19 - 09/25/19 19 +/- 3 09/25/19 - 10/02/19 18 +/- 2 10/02/19 - 10/09/19 9 +/- 2 10/09/19 - 10/16/19 14 +/- 2 10/16/19 - 10/23/19 7 +/- 2 10/23/19 - 10/30/19 12 +/- 2 10/30/19 - 11/06/19 9 +/- 2 11/06/19 - 11/13/19 13 +/- 2 11/13/19 - 11/20/19 12 +/- 2 11/20/19 - 11/26/19 11 +/- 2 11/26/19 - 12/04/19 9 +/- 2 12/04/19 - 12/11/19 11 +/- 2 12/11/19 - 12/18/19 10 +/- 2 12/18/19 - 12/26/19 19 +/- 2 12/26/19 - 01/02/20 18 +/- 2 AVERAGE 13 +/- 7 C-3

TABLE C-2 GAMMA SPECTROSCOPIC ANALYSES OF COMPOSITED AIR PARTICULATE FILTERS SUSQUEHANNA STEAM ELECTRIC STATION, 2019 Results in units of E-03 pCi/cu.m. +/- 2 sigma COLLECTION SITE PERIOD Be-7 K-40 Cs-134 Cs-137 8G1 01/02/19 - 04/03/19 104 +/- 21 < 12 < 1 < 1 04/03/19 - 07/03/19 117 +/- 21 < 10 < 1 < 1 07/03/19 - 10/02/19 118 +/- 22 < 19 < 1 < 1 10/02/19 - 01/02/20 93 +/- 15 < 11 < 1 < 1 AVERAGE 108 +/- 24 - - -

3S2 01/02/19 - 04/03/19 99 +/- 20 < 14 < 1 < 1 04/03/19 - 07/03/19 104 +/- 18 < 15 < 1 < 1 07/03/19 - 10/02/19 132 +/- 21 < 16 < 1 < 1 10/02/19 - 01/02/20 106 +/- 19 < 20 < 1 < 1 AVERAGE 110 +/- 30 - - -

12E1 01/02/19 - 04/03/19 116 +/- 27 < 15 < 1 < 1 04/03/19 - 07/03/19 122 +/- 23 < 11 < 2 < 2 07/03/19 - 10/02/19 127 +/- 18 < 14 < 1 < 1 10/02/19 - 01/02/20 86 +/- 17 < 16 < 1 < 1 AVERAGE 113 +/- 37 - - -

12S1 01/02/19 - 04/03/19 113 +/- 21 < 16 < 1 < 1 04/03/19 - 07/03/19 123 +/- 23 < 19 < 2 < 1 07/03/19 - 10/02/19 140 +/- 19 < 14 < 1 < 1 10/02/19 - 01/02/20 81 +/- 16 < 15 < 1 < 1 AVERAGE 114 +/- 49 - - -

13S6 01/02/19 - 04/03/19 160 +/- 28 < 17 < 1 < 1 04/03/19 - 07/03/19 121 +/- 21 < 19 < 1 < 1 07/03/19 - 10/02/19 123 +/- 19 < 13 < 1 < 1 10/02/19 - 01/02/20 90 +/- 17 < 13 < 1 < 1 AVERAGE 124 +/- 58 - - -

9B1 01/02/19 - 04/03/19 125 +/- 22 < 13 < 1 < 1 04/03/19 - 07/03/19 111 +/- 17 < 16 < 1 < 1 07/03/19 - 10/02/19 133 +/- 17 < 18 < 1 < 1 10/02/19 - 01/02/20 77 +/- 15 < 19 < 1 < 1 AVERAGE 112 +/- 49 - - -

10S3 01/02/19 - 04/03/19 119 +/- 25 < 21 < 1 < 1 04/03/19 - 07/03/19 117 +/- 22 < 12 < 1 < 1 07/03/19 - 10/02/19 123 +/- 19 < 17 < 1 < 1 10/02/19 - 01/02/20 85 +/- 19 < 23 < 1 < 1 AVERAGE 111 +/- 35 - - -

C-4

TABLE C-3 IODINE-131 ANALYSES OF AIR IODINE SAMPLES SUSQUEHANNA STEAM ELECTRIC STATION, 2019 Results in units of E-03 pCi/cu.m. +/- 2 sigma COLLECTION PERIOD 3S2 8G1 12E1 12S1 13S6 9B1 01/02/19 - 01/09/19 < 5 < 3 < 8 < 5 < 5 < 8 01/09/19 - 01/16/19 < 19 < 19 < 19 < 19 < 20 < 19 01/16/19 - 01/23/19 < 8 < 5 < 5 < 8 < 8 < 5 01/23/19 - 01/30/19 < 17 < 11 < 14 < 17 < 17 < 14 01/30/19 - 02/06/19 < 7 < 12 < 14 < 7 < 7 < 14 02/06/19 - 02/13/19 < 4 < 18 < 18 < 10 < 10 < 19 02/13/19 - 02/20/19 < 7 < 5 < 5 < 7 < 7 < 6 02/20/19 - 02/27/19 < 3 < 6 < 6 < 7 < 8 < 6 02/27/19 - 03/06/19 < 8 < 5 < 6 < 8 < 8 < 6 03/06/19 - 03/13/19 < 8 < 7 < 7 < 8 < 8 < 7 03/13/19 - 03/20/19 < 6 < 7 < 7 < 6 < 6 < 3 03/20/19 - 03/27/19 < 17 < 15 < 15 < 16 < 18 < 12 03/27/19 - 04/03/19 < 7 < 9 < 9 < 7 < 7 < 4 04/03/19 - 04/10/19 < 16 < 16 < 16 < 13 < 16 < 16 04/10/19 - 04/17/19 < 14 < 18 < 18 < 13 < 13 < 19 04/17/19 - 04/24/19 < 14 < 7 < 8 < 13 < 13 < 8 04/24/19 - 05/01/19 < 17 < 12 < 15 < 16 < 16 < 15 05/01/19 - 05/08/19 < 17 < 16 < 13 < 16 < 16 < 17 05/08/19 - 05/15/19 < 6 < 3 < 7 < 6 < 6 < 7 05/15/19 - 05/22/19 < 8 < 5 < 5 < 3 < 7 < 5 05/22/19 - 05/29/19 < 6 < 4 < 9 < 6 < 6 < 9 05/29/19 - 06/05/19 < 16 < 10 < 10 < 13 < 15 < 10 06/05/19 - 06/12/19 < 19 < 18 < 18 < 18 < 19 < 15 06/12/19 - 06/19/19 < 8 < 8 < 6 < 8 < 8 < 3 06/19/19 - 06/26/19 < 16 < 10 < 10 < 16 < 16 < 4 06/26/19 - 07/03/19 < 6 < 8 < 8 < 6 < 6 < 7 07/03/19 - 07/10/19 < 10 < 11 < 4 < 10 < 10 < 11 07/10/19 - 07/17/19 < 14 < 4 < 16 < 16 < 16 < 10 07/17/19 - 07/24/19 < 15 < 20 < 17 < 17 < 17 < 8 07/24/19 - 07/31/19 < 9 < 15 < 15 < 15 < 16 < 12 07/31/19 - 08/07/19 < 6 < 3 < 7 < 7 < 7 < 7 08/07/19 - 08/14/19 < 16 < 16 < 19 < 19 < 19 < 13 08/14/19 - 08/21/19 < 11 < 8 < 8 < 12 < 12 < 8 08/21/19 - 08/28/19 < 10 < 4 < 9 < 10 < 10 < 10 08/28/19 - 09/04/19 < 18 < 15 < 16 < 19 < 19 < 15 09/04/19 - 09/11/19 < 8 < 19 < 16 < 8 < 8 < 19 09/11/19 - 09/18/19 < 5 < 7 < 7 < 5 < 5 < 3 09/18/19 - 09/25/19 < 15 < 14 < 14 < 15 < 16 < 12 09/25/19 - 10/02/19 < 14 < 6 < 17 < 17 < 17 < 6 10/02/19 - 10/09/19 < 7 < 5 < 7 < 7 < 6 < 12 10/09/19 - 10/16/19 < 9 < 6 < 9 < 4 < 9 < 6 10/16/19 - 10/23/19 < 7 < 3 < 8 < 8 < 7 < 8 10/23/19 - 10/30/19 < 19 < 18 < 19 < 19 < 19 < 15 10/30/19 - 11/06/19 < 18 < 19 < 15 < 18 < 18 < 8 11/06/19 - 11/13/19 < 6 < 6 < 7 < 7 < 7 < 6 11/13/19 - 11/20/19 < 5 < 6 < 5 < 4 < 4 < 3 11/20/19 - 11/26/19 < 11 < 11 < 11 < 10 < 13 < 12 11/26/19 - 12/04/19 < 11 < 4 < 5 < 6 < 11 < 5 12/04/19 - 12/11/19 < 13 < 14 < 18 < 19 < 12 < 19 12/11/19 - 12/18/19 < 14 < 7 < 9 < 10 < 15 < 9 12/18/19 - 12/26/19 < 12 < 14 < 12 < 12 < 9 < 15 12/26/19 - 01/02/20 < 15 < 11 < 17 < 17 < 15 < 4 AVERAGE - - - - - -

C-5

TABLE C-3 IODINE-131 ANALYSES OF AIR IODINE SAMPLES SUSQUEHANNA STEAM ELECTRIC STATION, 2019 Results in units of E-03 pCi/cu.m. +/- 2 sigma COLLECTION PERIOD 10S3 01/02/19 - 01/09/19 < 5 01/09/19 - 01/16/19 < 19 01/16/19 - 01/23/19 < 8 01/23/19 - 01/30/19 < 17 01/30/19 - 02/06/19 < 7 02/06/19 - 02/13/19 < 19 02/13/19 - 02/20/19 < 3 02/20/19 - 02/27/19 < 6 02/27/19 - 03/06/19 < 8 03/06/19 - 03/13/19 < 8 03/13/19 - 03/20/19 < 6 03/20/19 - 03/27/19 < 16 03/27/19 - 04/03/19 < 7 04/03/19 - 04/10/19 < 16 04/10/19 - 04/17/19 < 20 04/17/19 - 04/24/19 < 14 04/24/19 - 05/01/19 < 16 05/01/19 - 05/08/19 < 16 05/08/19 - 05/15/19 < 6 05/15/19 - 05/22/19 < 7 05/22/19 - 05/29/19 < 6 05/29/19 - 06/05/19 < 15 06/05/19 - 06/12/19 < 18 06/12/19 - 06/19/19 < 8 06/19/19 - 06/26/19 < 10 06/26/19 - 07/03/19 < 6 07/03/19 - 07/10/19 < 10 07/10/19 - 07/17/19 < 16 07/17/19 - 07/24/19 < 17 07/24/19 - 07/31/19 < 16 07/31/19 - 08/07/19 < 7 08/07/19 - 08/14/19 < 19 08/14/19 - 08/21/19 < 12 08/21/19 - 08/28/19 < 10 08/28/19 - 09/04/19 < 19 09/04/19 - 09/11/19 < 3 09/11/19 - 09/18/19 < 5 09/18/19 - 09/25/19 < 14 09/25/19 - 10/02/19 < 17 10/02/19 - 10/09/19 < 7 10/09/19 - 10/16/19 < 9 10/16/19 - 10/23/19 < 8 10/23/19 - 10/30/19 < 16 10/30/19 - 11/06/19 < 18 11/06/19 - 11/13/19 < 7 11/13/19 - 11/20/19 < 5 11/20/19 - 11/26/19 < 11 11/26/19 - 12/04/19 < 5 12/04/19 - 12/11/19 < 18 12/11/19 - 12/18/19 < 9 12/18/19 - 12/26/19 < 11 12/26/19 - 01/02/20 < 16 AVERAGE - -

C-6

TABLE C-4 ENVIRONMENTAL OPTICALLY STIMULATED LUMINESCENCE DOSIMETRY RESULTS SUSQUEHANNA STEAM ELECTRIC STATION, 2019 Results (1) are in mR/std. qtr (2) +/- 2 sigma (3)

First Quarter Second Quarter Third Quarter Fourth Quarter 1/11/2019 to 3/21/2019 3/21/2019 to 7/22/2019 7/22/2019 to 10/9/2019 10/9/2019 to 1/17/2020 LOCATION ONSITE 1S2 16.9 +/- 1.0 22.2 +/- 1.4 22.9 +/- 1.8 20.7 +/- 0.7 2S2 12.7 +/- 1.2 12.9 +/- 0.1 12.5 +/- 0.2 13.6 +/- 5.3 2S3 16.4 +/- 0.3 19.2 +/- 1.0 18.8 +/- 0.9 20.9 +/- 4.7 3S2 11.6 +/- 0.2 14.2 +/- 0.2 13.7 +/- 0.6 14.0 +/- 2.1 3S3 10.0 +/- 0.5 14.4 +/- 0.5 13.3 +/- 0.2 11.5 +/- 1.9 4S3 17.9 +/- 1.6 19.9 +/- 0.6 17.6 +/- 0.2 20.2 +/- 2.8 4S6 12.3 +/- 2.6 14.1 +/- 0.3 13.7 +/- 1.1 15.7 +/- 1.6 5S4 10.8 +/- 0.9 12.0 +/- 0.5 12.1 +/- 0.5 13.2 +/- 1.5 5S7 14.1 +/- 0.6 17.4 +/- 0.8 16.8 +/- 0.7 16.2 +/- 1.6 6S4 20.5 +/- 0.0 23.2 +/- 1.1 23.3 +/- 0.3 22.5 +/- 2.3 6S9 17.0 +/- 0.6 21.2 +/- 1.3 23.5 +/- 1.1 22.6 +/- 0.5 7S6 16.9 +/- 0.3 20.5 +/- 0.5 22.4 +/- 0.1 20.8 +/- 2.3 7S7 10.8 +/- 0.0 13.3 +/- 0.5 12.3 +/- 0.6 13.2 +/- 0.8 8S2 19.4 +/- 0.6 21.0 +/- 2.1 23.3 +/- 1.3 24.7 +/- 7.0 9S2 25.6 +/- 1.6 34.5 +/- 0.2 40.1 +/- 1.2 41.9 +/- 1.3 10S1 12.4 +/- 2.2 14.5 +/- 2.0 13.7 +/- 0.7 12.1 +/- 0.1 10S2 25.6 +/- 1.6 30.0 +/- 0.7 29.3 +/- 0.7 30.8 +/- 4.1 11S7 11.0 +/- 1.9 14.0 +/- 1.4 14.7 +/- 0.5 14.9 +/- 1.9 12S1 13.5 +/- 2.7 15.1 +/- 0.5 15.0 +/- 0.3 16.3 +/- 0.3 12S3 17.0 +/- 0.6 20.5 +/- 0.0 17.8 +/- 0.2 20.6 +/- 0.1 12S7 11.7 +/- 0.6 15.0 +/- 1.2 15.5 +/- 0.0 13.3 +/- 2.3 13S2 22.2 +/- 1.1 23.7 +/- 1.5 28.8 +/- 4.7 22.7 +/- 5.7 13S5 22.7 +/- 0.4 26.5 +/- 2.5 29.2 +/- 0.6 28.6 +/- 0.6 13S6 16.5 +/- 1.9 19.5 +/- 0.1 20.8 +/- 0.2 19.1 +/- 0.8 14S5 15.1 +/- 0.4 17.6 +/- 0.8 19.3 +/- 0.3 18.9 +/- 0.5 15S5 15.3 +/- 1.5 15.2 +/- 0.2 14.3 +/- 1.9 14.6 +/- 0.3 16S1 16.6 +/- 1.1 20.6 +/- 2.2 21.0 +/- 1.8 16.0 +/- 3.4 16S2 16.7 +/- 2.0 19.6 +/- 1.1 20.6 +/- 1.1 14.4 +/- 2.7 See the comments at the end of this table.

C-7

TABLE C-4 ENVIRONMENTAL OPTICALLY STIMULATED LUMINESCENCE DOSIMETRY RESULTS SUSQUEHANNA STEAM ELECTRIC STATION, 2019 Results (1) are in mR/std. qtr (2) +/- 2 sigma (3)

First Quarter Second Quarter Third Quarter Fourth Quarter 1/11/2019 to 3/21/2019 3/21/2019 to 7/22/2019 7/22/2019 to 10/9/2019 10/9/2019 to 1/17/2020 LOCATION 0-1 MILE OFFSITE 6A4 14.1 +/- 1.0 17.7 +/- 0.7 16.2 +/- 1.5 15.9 +/- 4.7 8A3 14.1 +/- 0.3 14.7 +/- 0.9 15.1 +/- 0.7 14.7 +/- 1.4 15A3 11.0 +/- 0.2 12.9 +/- 0.9 12.0 +/- 0.4 11.5 +/- 1.4 16A2 9.8 +/- 0.7 12.2 +/- 0.1 12.6 +/- 0.3 10.7 +/- 4.7 1-2 MILES OFFSITE 8B2 12.9 +/- 1.3 13.5 +/- 0.1 13.1 +/- 4.2 15.3 +/- 2.5 9B1 15.6 +/- 0.2 18.9 +/- 1.5 18.8 +/- 0.2 19.3 +/- 0.3 10B3 12.2 +/- 1.2 13.2 +/- 0.4 12.2 +/- 1.0 11.0 +/- 1.2 3-4 MILES OFFSITE 1D5 14.3 +/- 0.5 16.2 +/- 0.1 16.6 +/- 0.3 15.5 +/- 1.2 8D3 13.8 +/- 0.7 13.2 +/- 1.1 15.4 +/- 1.2 15.1 +/- 1.3 9D4 14.8 +/- 0.5 15.3 +/- 0.9 18.1 +/- 0.8 16.0 +/- 1.2 10D1 14.0 +/- 0.6 14.9 +/- 1.7 15.0 +/- 0.9 15.1 +/- 0.5 12D2 15.5 +/- 0.6 18.2 +/- 0.7 18.1 +/- 0.5 18.1 +/- 1.7 14D1 11.3 +/- 1.9 15.5 +/- 0.8 14.5 +/- 0.9 16.4 +/- 1.2 4-5 MILES OFFSITE 3E1 12.1 +/- 0.9 11.2 +/- 0.5 12.8 +/- 1.1 14.7 +/- 1.1 4E2 13.4 +/- 1.0 14.8 +/- 1.0 17.3 +/- 0.1 16.9 +/- 3.8 5E2 14.6 +/- 2.6 15.5 +/- 0.3 16.3 +/- 0.5 15.6 +/- 0.3 6E1 17.1 +/- 1.0 16.4 +/- 0.7 18.4 +/- 0.2 18.3 +/- 1.4 7E1 14.5 +/- 0.1 14.5 +/- 0.7 16.9 +/- 0.0 18.0 +/- 3.5 11E1 10.0 +/- 0.4 10.9 +/- 0.0 12.6 +/- 0.6 13.4 +/- 0.7 12E1 11.3 +/- 1.5 13.0 +/- 0.3 12.0 +/- 0.0 15.5 +/- 0.6 13E4 16.0 +/- 0.3 16.7 +/- 1.1 15.1 +/- 0.2 19.5 +/- 0.8 See the comments at the end of this table.

C-8

TABLE C-4 ENVIRONMENTAL OPTICALLY STIMULATED LUMINESCENCE DOSIMETRY RESULTS SUSQUEHANNA STEAM ELECTRIC STATION, 2019 Results (1) are in mR/std. qtr (2) +/- 2 sigma (3)

First Quarter Second Quarter Third Quarter Fourth Quarter 1/11/2019 to 3/21/2019 3/21/2019 to 7/22/2019 7/22/2019 to 10/9/2019 10/9/2019 to 1/17/2020 LOCATION 5-10 MILES OFFSITE 2F1 12.8 +/- 0.1 14.6 +/- 0.1 16.4 +/- 0.8 12.8 +/- 0.1 15F1 16.0 +/- 1.1 15.9 +/- 2.2 14.7 +/- 0.4 17.3 +/- 0.6 16F1 14.9 +/- 0.3 18.4 +/- 0.3 16.6 +/- 1.1 20.0 +/- 1.0 10-20 MILES OFFSITE 3G4 15.0 +/- 0.9 15.6 +/- 0.0 17.7 +/- 0.1 17.9 +/- 3.6 4G1 16.9 +/- 0.8 17.0 +/- 0.6 18.3 +/- 1.1 18.5 +/- 0.6 7G1 13.6 +/- 0.9 13.8 +/- 0.2 17.4 +/- 0.6 13.6 +/- 2.3 12G1 10.7 +/- 0.4 12.5 +/- 0.5 15.5 +/- 2.4 10.1 +/- 1.3 12G4 13.4 +/- 0.1 13.7 +/- 0.2 15.1 +/- 1.2 12.1 +/- 0.3 See the comments at the end of this table.

LOCATION INDICATOR Average (5) 14.9 +/- 7.3 17.1 +/- 9.2 17.6 +/- 10.9 17.5 +/- 10.8 CONTROL Average (5) 13.9 +/- 4.6 14.7 +/- 4.0 16.8 +/- 2.8 14.5 +/- 7.3 COMMENTS (1) Individual monitor location results are normally the average of the elemental doses of four elements from the two dosimeters assigned to each monitoring location.

(2) A standard (std.) quarter (qtr.) is considered to be 91.25 days. Results obtained for monitoring periods of other durations are normalized by multiplying them by 91.25/x, where x is the actual duration in days of the period.

(3) Uncertainties for individual monitoring location results are two standard deviations of the elemental doses of four elements from the two dosimeters assigned to each monitoring location, representing the variability between the elemental doses of each of the four dosimeter elements.

(4) No measurement could be made at this location because the dosimeters were lost, stolen, or damaged. Refer to Section III, Program Description.

of the Annual Radiological Environmental Operating Report for an explanation of program exceptions to REMP.

(5) Uncertainties associated with quarterly indicator and control averages are two standard deviations, representing the variability between the results of the individual monitoring locations.

C-9

TABLE C-5 IODINE-131 AND GAMMA SPECTROSCOPIC ANALYSES OF MILK SUSQUEHANNA STEAM ELECTRIC STATION, 2019 Results in pCi/Liter +/- 2 sigma COLLECTION <----------GAMMA EMITTERS---------->

SITE DATE I-131 K-40 Cs-134 Cs-137 Ba-140 La-140 Th-228 10G1 01/07/19 < 1.0 1384 +/- 164 < 11 < 10 < 38 < 9 < 20 02/04/19 < 0.3 1281 +/- 134 < 8 < 8 < 25 < 7 < 15 03/04/19 < 0.8 1411 +/- 144 < 5 < 6 < 27 < 8 < 11 04/08/19 < 0.7 1356 +/- 147 < 6 < 7 < 24 < 9 < 11 04/22/19 < 0.4 1463 +/- 207 < 8 < 8 < 28 < 10 < 17 05/06/19 < 0.5 1348 +/- 159 < 5 < 6 < 22 < 5 < 12 05/20/19 < 0.7 1408 +/- 152 < 6 < 7 < 20 < 8 < 11 06/03/19 < 0.5 1257 +/- 207 < 7 < 9 < 40 < 11 < 18 06/16/19 < 0.7 1209 +/- 148 < 7 < 6 < 26 < 10 < 13 07/01/19 < 0.9 1433 +/- 147 < 7 < 7 < 31 < 11 < 11 07/15/19 < 0.9 1301 +/- 174 < 6 < 8 < 30 < 10 < 13 07/29/19 < 0.9 1080 +/- 182 < 8 < 8 < 30 < 10 < 14 08/12/19 < 0.6 1372 +/- 176 < 6 < 8 < 39 < 10 < 17 08/26/19 < 0.9 1274 +/- 215 < 7 < 8 < 39 < 10 < 15 09/09/19 < 0.9 1429 +/- 219 < 9 < 10 < 47 < 12 < 20 09/23/19 < 0.7 1377 +/- 185 < 7 < 8 < 36 < 12 < 16 10/07/19 < 0.7 1324 +/- 179 < 8 < 8 < 27 < 11 < 16 10/21/19 < 0.9 1263 +/- 198 < 7 < 9 < 38 < 10 < 20 11/04/19 < 0.9 1374 +/- 161 < 6 < 7 < 31 < 8 < 12 12/09/19 < 0.5 1264 +/- 153 < 6 < 7 < 29 < 9 < 13 AVERAGE - 1330 +/- 183 - - - - -

13E3 01/07/19 < 0.5 1349 +/- 164 < 6 < 7 < 26 < 8 < 13 02/04/19 < 0.4 1372 +/- 147 < 10 < 8 < 33 < 9 < 18 03/04/19 < 0.6 1466 +/- 172 < 6 < 6 < 33 < 10 < 14 04/08/19 < 0.5 1292 +/- 148 < 5 < 6 < 24 < 6 < 11 04/22/19 < 0.4 1317 +/- 195 < 6 < 8 < 31 < 7 < 14 05/06/19 < 0.9 1262 +/- 159 < 6 < 5 < 23 < 4 < 13 05/20/19 < 0.8 1247 +/- 171 < 5 < 6 < 24 < 7 < 11 06/03/19 < 0.6 1306 +/- 164 < 8 < 9 < 34 < 11 < 13 06/16/19 < 0.8 1425 +/- 174 < 7 < 6 < 27 < 6 < 16 07/01/19 < 0.6 1504 +/- 167 < 6 < 6 < 31 < 10 < 12 07/15/19 < 0.9 1361 +/- 179 < 6 < 8 < 27 < 9 < 13 07/29/19 < 0.6 1190 +/- 199 < 8 < 11 < 35 < 12 < 17 08/12/19 < 1.0 1422 +/- 132 < 4 < 6 < 20 < 6 < 10 08/26/19 < 0.9 1210 +/- 153 < 8 < 9 < 32 < 9 < 15 09/09/19 < 0.8 1306 +/- 114 < 6 < 6 < 21 < 8 < 11 09/23/19 < 0.8 1357 +/- 191 < 8 < 10 < 37 < 8 < 20 10/07/19 < 0.7 1337 +/- 93 < 3 < 4 < 13 < 4 < 6.9 10/21/19 < 0.8 1227 +/- 128 < 9 < 8 < 34 < 8 < 15 11/04/19 < 0.8 1275 +/- 166 < 7 < 7 < 28 < 10 < 13 12/09/19 < 0.5 1313 +/- 182 < 6 < 9 < 29 < 11 < 13 AVERAGE - 1327 +/- 167 - - - - -

C-10

TABLE C-5 IODINE-131 AND GAMMA SPECTROSCOPIC ANALYSES OF MILK SUSQUEHANNA STEAM ELECTRIC STATION, 2019 Results in pCi/Liter +/- 2 sigma COLLECTION <----------GAMMA EMITTERS---------->

SITE DATE I-131 K-40 Cs-134 Cs-137 Ba-140 La-140 Th-228 5E2 01/07/19 < 0.6 1042 +/- 182 < 9 < 9 < 34 < 12 < 16 02/04/19 < 0.4 1187 +/- 135 < 9 < 8 < 29 < 10 < 17 03/04/19 < 0.5 1322 +/- 177 < 6 < 5 < 26 < 8 < 11 04/08/19 < 0.5 1336 +/- 126 < 4 < 4 < 19 < 5 < 8.3 04/22/19 < 0.4 1428 +/- 180 < 7 < 8 < 29 < 10 < 15 05/06/19 < 0.6 1069 +/- 178 < 6 < 6 < 23 < 5 < 12 05/20/19 < 0.8 1127 +/- 138 < 6 < 7 < 21 < 6 < 11 06/03/19 < 0.5 1132 +/- 202 < 9 < 9 < 34 < 8 < 17 06/16/19 < 0.8 1208 +/- 188 < 6 < 9 < 28 < 14 < 14 07/01/19 < 0.6 1222 +/- 166 < 6 < 6 < 37 < 10 < 14 07/15/19 < 0.9 1070 +/- 172 < 6 < 5 < 34 < 8 < 10 07/29/19 < 0.7 1210 +/- 202 < 6 < 8 < 31 < 10 < 18 08/12/19 < 0.7 1106 +/- 137 < 5 < 5 < 24 < 9 < 12 08/26/19 < 0.8 1238 +/- 193 < 7 < 7 < 29 < 8 < 17 09/09/19 < 0.8 1288 +/- 128 < 6 < 7 < 23 < 7 < 13 09/23/19 < 0.9 1312 +/- 204 < 8 < 11 < 33 < 8 < 17 10/07/19 < 0.8 1428 +/- 199 < 6 < 8 < 29 < 7 < 15 10/21/19 < 0.7 1278 +/- 152 < 6 < 7 < 23 < 9 < 13 11/04/19 < 0.8 1411 +/- 178 < 6 < 7 < 28 < 9 < 14 12/09/19 < 0.8 1146 +/- 156 < 6 < 8 < 24 < 8 < 14 AVERAGE - 1228 +/- 241 - - - - -

C-11

TABLE C-6 TRITIUM AND GAMMA SPECTROSCOPIC ANALYSES OF GROUNDWATER SUSQUEHANNA STEAM ELECTRIC STATION, 2019 Results in pCi/Liter +/- 2 sigma COLLECTION <----------GAMMA EMITTERS---------->

SITE DATE H-3 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 I-131 Cs-134 Cs-137 Ba-140 La-140 Th-228 2S8 01/25/19 < 143 < 115 < 6 < 7 < 23 < 6 < 16 < 8 < 11 < 12 < 7 < 5 < 34 < 8 < 13 04/25/19 < 147 < 73 < 6 < 6 < 16 < 7 < 13 < 7 < 11 < 13 < 6 < 8 < 32 < 10 < 14 07/18/19 < 142 < 75 < 6 < 6 < 17 < 7 < 17 < 8 < 12 < 11 < 6 < 8 < 29 < 9 < 17 10/09/19 < 144 < 125 < 5 < 7 < 19 <8 < 15 < 8 < 15 < 12 < 7 < 6 < 34 < 12 < 12 AVERAGE - - - - - - - - - - - - - - -

13S7 01/28/19 177 +/- 92 < 133 < 5 < 5 < 17 < 7 < 13 < 8 < 12 < 10 < 7 < 6 < 30 < 13 < 12 04/29/19 < 148 < 58 < 5 < 6 < 14 < 6 < 12 < 6 < 10 < 11 < 5 < 6 < 32 < 8 < 12 07/16/19 150 +/- 95 < 51 < 6 < 6 < 16 < 6 < 12 < 7 < 10 < 9 < 6 < 6 < 29 < 10 < 10 10/08/19 < 149 < 75 < 7 < 8 < 23 <7 < 12 < 6 < 12 < 13 < 6 < 6 < 34 < 11 < 12 AVERAGE 164 +/- 38 - - - - - - - - - - - - - -

1S3 01/28/19 303 +/- 100 < 100 < 5 < 6 < 17 < 6 < 11 < 7 < 9 < 8 < 5 < 6 < 24 < 12 < 12 04/29/19 343 +/- 104 < 69 < 8 < 6 < 16 < 7 < 16 < 6 < 12 < 11 < 6 < 6 < 27 < 9 < 13 07/15/19 210 +/- 97 < 137 < 5 < 6 < 18 < 7 < 10 < 7 < 10 < 11 < 6 < 6 < 25 < 10 < 12 10/08/19 154 +/- 97 < 97 < 5 < 7 < 12 <7 < 10 < 7 < 11 < 11 < 5 < 6 < 30 < 11 < 13 AVERAGE 253 +/- 172 - - - - - - - - - - - - - -

4S8 01/28/19 205 +/- 93 < 114 < 6 < 6 < 18 < 6 < 14 < 8 < 11 < 9 < 5 < 7 < 27 < 6 < 13 04/29/19 203 +/- 98 < 90 < 6 < 6 < 16 < 6 < 11 < 6 < 12 < 10 < 5 < 5 < 29 < 10 < 11 07/16/19 206 +/- 96 < 52 < 6 < 6 < 18 < 7 < 13 < 5 < 11 < 10 < 6 < 6 < 26 < 10 < 11 10/08/19 169 +/- 97 < 105 < 5 < 4 < 12 <8 < 15 < 9 < 10 < 10 < 6 < 7 < 30 < 15 < 11 AVERAGE 196 +/- 36 - - - - - - - - - - - - - -

4S9 01/24/19 < 145 < 106 < 6 < 6 < 16 < 6 < 17 < 9 < 12 < 13 < 7 < 7 < 31 < 13 < 14 04/22/19 < 147 < 59 < 5 < 4 < 10 < 7 < 12 < 5 < 7 < 10 < 6 < 5 < 28 < 12 < 11 07/17/19 192 +/- 95 < 99 < 5 < 5 < 12 < 6 < 12 < 6 < 12 < 10 < 5 < 5 < 26 < 7 < 11 10/09/19 < 145 < 138 < 4 < 5 < 23 <8 < 18 < 7 < 11 < 13 < 5 < 8 < 33 < 9 < 14 AVERAGE 192 +/- 0 - - - - - - - - - - - - - -

6S11A 01/25/19 < 145 < 59 < 5 < 6 < 20 < 6 < 12 < 6 < 12 < 13 < 5 < 5 < 38 < 12 < 10 04/25/19 < 147 < 86 < 5 < 4 < 15 < 6 < 9 < 5 < 8 < 9 < 5 < 5 < 23 < 8 < 9 07/17/19 < 142 < 44 < 5 < 6 < 17 < 6 < 14 < 6 < 8 < 10 < 5 < 5 < 24 < 10 < 10 10/09/19 < 143 < 61 < 7 < 8 < 26 <8 < 14 < 8 < 12 < 13 < 8 < 8 < 36 < 12 < 15 AVERAGE - - - - - - - - - - - - - - -

C-12

TABLE C-6 TRITIUM AND GAMMA SPECTROSCOPIC ANALYSES OF GROUNDWATER SUSQUEHANNA STEAM ELECTRIC STATION, 2019 Results in pCi/Liter +/- 2 sigma COLLECTION <----------GAMMA EMITTERS---------->

SITE DATE H-3 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 I-131 Cs-134 Cs-137 Ba-140 La-140 Th-228 6S12 01/24/19 < 142 < 127 < 6 < 8 < 18 < 7 < 15 < 8 < 12 < 11 < 7 < 7 < 38 < 12 < 14 04/22/19 < 150 < 102 < 6 < 6 < 16 < 6 < 12 < 7 < 11 < 14 < 6 < 7 < 37 < 14 < 12 07/17/19 < 146 < 57 < 5 < 7 < 16 < 7 < 12 < 7 < 10 < 9 < 6 < 7 < 28 < 9 < 11 10/09/19 < 145 < 149 < 9 < 8 < 16 <8 < 20 < 8 < 14 < 14 < 10 < 8 < 38 < 13 < 16 AVERAGE - - - - - - - - - - - - - - -

7S10 01/24/19 < 144 < 44 < 5 < 5 < 14 < 6 < 10 < 7 < 11 < 11 < 5 < 7 < 29 < 9 < 10 04/22/19 170 +/- 96 < 48 < 6 < 6 < 18 < 6 < 15 < 6 < 11 < 13 < 6 < 6 < 31 < 10 < 12 07/15/19 < 145 < 110 < 5 < 5 < 13 < 5 < 12 < 6 < 10 < 11 < 5 < 6 < 31 < 9 < 11 10/07/19 < 145 < 106 < 6 < 5 < 19 <8 < 14 < 6 < 13 < 14 < 6 < 6 < 31 < 11 < 14 AVERAGE 170 +/- 0 - - - - - - - - - - - - - -

7S11 01/24/19 < 141 < 115 < 5 < 6 < 13 < 6 < 13 < 6 < 11 < 13 < 5 < 6 < 29 < 11 < 11 04/22/19 < 147 < 135 < 6 < 6 < 19 < 7 < 10 < 9 < 12 < 14 < 5 < 6 < 38 < 8 < 12 07/15/19 < 141 < 81 < 4 < 5 < 11 < 6 < 8 < 6 < 9 < 10 < 5 < 5 < 21 < 6 < 12 10/07/19 < 142 < 122 < 5 < 6 < 17 <6 < 12 < 8 < 11 < 14 < 5 < 6 < 37 < 12 < 12 AVERAGE - - - - - - - - - - - - - - -

8S4 01/28/19 < 137 < 115 < 6 < 5 < 20 < 7 < 12 < 8 < 11 < 10 < 6 < 5 < 27 < 10 < 13 04/29/19 195 +/- 96 < 114 < 6 < 6 < 18 < 6 < 15 < 6 < 11 < 12 < 7 < 7 < 30 < 9 < 14 07/16/19 < 134 < 100 < 5 < 5 < 16 < 6 < 11 < 5 < 10 < 10 < 6 < 5 < 25 < 8 < 11 10/08/19 159 +/- 95 < 168 < 8 < 8 < 18 <6 < 16 < 8 < 12 < 14 < 5 < 7 < 34 < 12 < 15 AVERAGE 177 +/- 51 - - - - - - - - - - - - - -

C-13

TABLE C-7 ANNUAL AVERAGE TRITIUM CONCENTRATION IN PRECIPITATION, MONITORING WELLS AND LAKE TOOK-A-WHILE (LTAW) SURFACE WATER DATA SUSQUEHANNA STEAM ELECTRIC STATION, 2019 Results in pCi/Liter +/- 2 sigma SITE 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 Precip Sites 3S2**, 12S1**, 8G1** (offsite, controls) 62* 49 40 38 82 63 51 39 45 32 45 **

Precip Sites 1 and 2 (onsite, East of Station Reactor Bldgs) 370 230* 193 216 242 182 142 250 206 251 325 333 Precipitation Sites 3 and 4 (onsite, West of Station Reactor Bldgs) 414 404* 350 233 169 151 231 258 197 383 494 355 1S3 - MW-1 (43') 248 150 252 131 164 197 115 169 175 130 218 253 4S8 - MW-2 (45') 292 154 190 173 137 202 187 138 154 138 191 196 4S9 - MW-3 (94') 127 54 150 64 80 135 94 180 125 55 109 92 8S4 - MW-4 (111') 172 66 105 68 81 109 60 162 145 91 102 155 7S10 - MW-5 (36') 171 69 96 -6 74 106 68 70 73 51 93 125 13S7 - MW-6 (16') 142 134 143 34 80 111 71 79 111 107 122 120 2S8 - MW-7 (85') Not installed Not installed Not installed 22 54 72 70 70 74 56 37 71 6S11A - MW-8A (14') 177 82 165 58 15 72 103 110 63 38 50 83 6S11B - MW-8B (19') Dry well Dry well Dry well Dry well Dry well Dry well Dry well Dry well Dry well Dry well Dry well Dry well 6S12 - MW-9 (28') 30 -44 45 18 6 60 21 57 70 5 27 50 7S11 - MW-10 (132') 3 -27 -9 1 -1 23 29 55 13 1 33 16

- 12F3 - Groundwater Control 26 -53 -2 5 -6 45 -26 20 41 61 82 **

- LTAW- Surface Water 179 104 110 132 132 145 27 73 89 77 135 **

Revised values to reflect full scope of precipitation data.

- Stations were discontinued after 5/30/18.

C-14

TABLE C-8 GROSS BETA, TRITIUM AND GAMMA SPECTROSCOPIC ANALYSES OF DRINKING WATER SUSQUEHANNA STEAM ELECTRIC STATION, 2019 Results in pCi/Liter +/- 2 sigma COLLECTION PERIOD <----------GAMMA EMITTERS---------->

SITE START STOP Gr-B H-3 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 I-131 Cs-134 Cs-137 Ba-140 La-140 12H2 12/31/18 - 01/28/19 < 2.0 < 143 < 29 < 2 < 2 < 6 < 2 < 3 < 2 < 4 < 10 < 2 < 2 < 18 < 6 12H2 01/28/19 - 02/26/19 < 1.8 < 134 < 33 < 1 < 2 < 4 < 2 < 3 < 2 < 3 < 9 < 2 < 2 < 17 < 6 12H2 02/26/19 - 03/26/19 < 2.1 < 150 < 29 < 2 < 2 < 5 < 2 < 4 < 2 < 3 < 9 < 2 < 2 < 16 < 6 12H2 03/26/19 - 04/30/19 < 1.7 < 149 < 31 < 2 < 2 < 6 < 2 < 3 < 2 < 3 < 12 < 2 < 2 < 19 < 7 12H2 04/30/19 - 05/28/19 < 2.0 < 139 < 15 < 2 < 2 < 6 < 2 < 4 < 2 < 4 < 10 < 2 < 2 < 17 < 6 12H2 05/28/19 - 06/25/19 < 2.0 < 141 < 35 < 2 < 2 < 6 < 2 < 4 < 2 < 4 < 10 < 2 < 2 < 18 < 6 12H2 06/25/19 - 07/30/19 2.4 +/- 1.4 < 147 < 16 < 2 < 2 < 6 < 2 < 3 < 2 < 3 < 12 < 1 < 2 < 20 < 6 12H2 07/02/19 - 07/02/19 < 1.9 < 146 < 35 < 2 < 2 < 8 < 2 < 4 < 2 < 4 < 10 < 2 < 2 < 37 < 12 12H2 07/30/19 - 08/27/19 2.4 +/- 1.4 < 133 < 14 < 2 < 2 < 6 < 2 < 4 < 2 < 3 < 10 < 2 < 2 < 18 < 6 12H2 08/27/19 - 09/24/19 2.7 +/- 1.6 < 147 < 16 < 2 < 2 < 6 < 2 < 4 < 2 < 4 < 9 < 2 < 2 < 17 < 5 12H2 09/24/19 - 10/29/19 2.8 +/- 1.5 < 141 < 18 < 2 < 2 < 5 < 2 < 3 < 2 < 3 < 9 < 1 < 2 < 16 < 6 12H2 10/29/19 - 11/25/19 2.5 +/- 1.3 < 137 < 27 < 2 < 2 < 5 < 2 < 3 < 2 < 3 < 9 < 1 < 2 < 16 < 5 12H2 11/25/19 - 12/31/19 < 1.8 < 138 < 16 < 2 < 2 < 6 < 2 < 4 < 2 < 4 < 14 < 2 < 2 < 22 < 8 AVERAGE 2.6 +/- 0.3 - - - - - - - - - - - - - -

C-15

TABLE C-9 GAMMA SPECTROSCOPIC ANALYSES OF FOOD PRODUCTS (FRUITS, VEGETABLES AND BROADLEAF)

SUSQUEHANNA STEAM ELECTRIC STATION, 2019 Results in pCi/kg (wet) +/- 2 sigma COLLECTION SITE DATE Be-7 K-40 I-131 Cs-134 Cs-137 Ac-228 Th-228 11D1 11/26/19 < 196 2857 +/- 449 < 46 < 22 < 24 < 101 < 47 11/26/19 < 213 17410 +/- 1072 < 52 < 22 < 28 < 115 < 44 11/26/19 < 185 2962 +/- 584 < 46 < 18 < 23 < 88 < 44 AVERAGE - 7743 +/- 16744 - - - - -

11S6 06/25/19 < 333 5230 +/- 708 < 30 < 23 < 26 < 100 < 52 06/25/19 < 237 4336 +/- 625 < 34 < 21 < 26 < 72 < 39 07/15/19 352 +/- 102 4398 +/- 410 < 18 < 15 < 17 < 72 < 23 07/15/19 < 170 4828 +/- 422 < 20 < 16 < 17 < 62 < 32 08/19/19 958 +/- 277 4194 +/- 688 < 36 < 28 < 26 < 122 < 42 08/19/19 461 +/- 201 4681 +/- 621 < 31 < 21 < 23 < 104 < 45 09/16/19 < 331 4240 +/- 556 < 38 < 40 < 34 < 131 < 57 09/16/19 < 263 4552 +/- 651 < 30 < 28 < 29 < 89 < 48 10/14/19 606 +/- 271 5314 +/- 687 < 38 < 26 < 29 < 106 < 47 10/14/19 < 327 4218 +/- 692 < 39 < 27 < 31 < 145 < 55 AVERAGE 594 +/- 528 4599 +/- 821 - - - - -

C-16

TABLE C-10 TRITIUM AND GAMMA SPECTROSCOPIC ANALYSES OF SURFACE WATER SUSQUEHANNA STEAM ELECTRIC STATION, 2019 Results in pCi/Liter +/- 2 sigma COLLECTION <----------GAMMA EMITTERS---------->

SITE PERIOD H-3 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 I-131 Cs-134 Cs-137 Ba-140 La-140 Th-228 6S6 12/31/18 - 01/28/19 < 146 < 19 < 2 <2 <6 < 2 < 4 < 2 < 3 < 10 <2 <2 < 18 <6 < 3 01/28/19 - 02/26/19 < 147 < 15 < 2 < 2 <5 < 2 < 4 < 2 < 4 < 10 <2 <2 < 18 <5 <3 02/26/19 - 03/26/19 < 148 < 16 < 2 < 2 <7 < 2 < 4 < 2 < 4 < 10 < 2 <2 < 20 <6 <3 03/26/19 - 04/30/19 < 149 < 32 <2 < 2 < 6 < 2 < 3 <2 <3 < 12 <1 <2 < 19 < 6 <3 04/30/19 - 05/28/19 < 140 < 15 < 2 <2 <6 <2 <4 <2 < 3 < 10 < 2 <2 < 18 <6 < 3 05/28/19 - 06/25/19 < 141 < 15 <2 <2 < 5 < 2 < 3 < 2 < 3 < 10 <2 < 2 < 17 <5 <3 06/25/19 - 07/30/19 < 143 < 17 < 2 <2 <5 <2 <4 < 2 < 4 < 15 < 2 <2 < 23 <7 < 3 07/30/19 - 08/27/19 < 141 < 15 <2 <2 < 5 < 2 < 3 < 2 <3 < 10 <1 < 2 < 16 <6 <3 08/27/19 - 09/24/19 < 143 < 24 <1 <2 <4 < 2 < 3 < 2 < 3 <6 <1 < 1 < 12 < 4 < 3 09/24/19 - 10/29/19 < 144 < 40 < 2 <2 <5 < 2 < 3 < 2 < 3 <9 <2 < 2 < 17 < 5 <3 10/29/19 - 11/25/19 < 140 < 32 <2 <2 < 6 <2 <3 <2 < 3 < 10 < 2 <2 < 16 < 6 < 3 11/25/19 - 12/31/19 < 141 < 33 < 2 <2 <6 <2 < 3 < 2 < 3 < 13 <2 < 2 < 21 <7 <3 AVERAGE - - - - - - - - - - - - - -

2S7 12/31/18 - 01/28/19 342 +/- 103 < 15 < 2 < 2 < 6 < 2 < 4 < 2 < 4 < 12 < 2 < 2 < 21 < 6 < 4 01/28/19 - 02/26/19 164 +/- 95 < 25 < 1 < 2 < 5 < 1 < 3 < 2 < 3 < 8 < 1 < 2 < 14 < 5 < 3 02/26/19 - 03/26/19 723 +/- 121 < 16 < 2 < 2 < 6 < 2 < 3 < 2 < 3 < 9 < 1 < 2 < 15 < 5 < 3 03/26/19 - 04/30/19 2050 +/- 217 < 16 < 2 < 2 < 5 < 2 < 3 < 2 < 3 < 12 < 2 < 2 < 20 < 6 < 3 04/30/19 - 05/28/19 899 +/- 156 < 14 < 2 < 2 < 5 < 2 < 3 < 2 < 3 < 11 < 2 < 2 < 18 < 6 < 3 05/28/19 - 06/10/19 287 +/- 102 < 32 < 1 < 2 < 5 < 2 < 3 < 2 < 3 < 14 < 1 < 1 < 22 < 7 < 3 06/11/19 - 06/25/19 195 +/- 98 < 16 < 2 < 2 < 5 < 2 < 3 < 2 < 3 < 6 < 2 < 2 < 13 < 4 < 3 07/02/19 - 07/30/19 312 +/- 107 < 18 < 2 < 2 < 6 < 2 < 4 < 2 < 4 < 13 < 2 < 2 < 23 < 6 < 4 08/06/19 - 08/27/19 165 +/- 94 < 15 < 2 < 2 < 6 < 2 < 4 < 2 < 4 < 8 < 2 < 2 < 16 < 6 < 3 08/27/19 - 09/24/19 3660 +/- 421 < 14 < 1 < 2 < 5 < 2 < 3 < 2 < 3 < 7 < 1 < 2 < 13 < 4 < 3 09/24/19 - 10/29/19 752 +/- 145 < 15 < 2 < 2 < 5 < 2 < 3 < 2 < 3 < 8 < 1 < 2 < 15 < 5 < 3 10/29/19 - 11/25/19 609 +/- 117 < 17 < 2 < 2 < 6 < 2 < 4 < 2 < 4 < 11 < 2 < 2 < 19 < 6 < 3 11/25/19 - 12/31/19 < 145 < 16 < 2 < 2 < 6 < 2 < 4 < 2 < 3 < 13 < 2 < 2 < 20 < 7 < 3 AVERAGE 847 +/- 2059 - - - - - - - - - - - - - -

C-17

TABLE C-10 TRITIUM AND GAMMA SPECTROSCOPIC ANALYSES OF SURFACE WATER SUSQUEHANNA STEAM ELECTRIC STATION, 2019 Results in pCi/Liter +/- 2 sigma COLLECTION <----------GAMMA EMITTERS---------->

SITE PERIOD H-3 K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 I-131 Cs-134 Cs-137 Ba-140 La-140 Th-228 6S5 01/08/19 - 01/28/19 < 145 < 33 < 3 <3 < 11 < 4 < 6 < 3 < 5 < 14 <3 <3 < 28 < 10 <5 02/05/19 - 02/26/19 < 149 < 53 < 3 < 4 < 10 < 3 <7 <4 <6 < 11 < 4 <4 < 25 <7 <7 03/05/19 - 03/26/19 < 147 < 29 < 2 < 2 < 6 < 2 <4 <2 <3 < 7 < 2 <2 < 14 <5 <3 04/02/19 - 04/30/19 < 150 < 20 < 2 <2 <7 < 2 < 4 < 2 < 4 < 12 <2 <2 < 20 <7 <4 05/07/19 - 05/28/19 < 141 < 29 < 2 < 2 < 5 <2 <3 <2 <3 < 7 < 2 <2 < 14 <5 < 3 06/04/19 - 06/25/19 < 145 < 32 < 3 <4 < 10 <4 <7 < 4 < 7 < 13 < 3 <3 < 28 < 10 <6 07/02/19 - 07/30/19 < 147 < 31 < 2 < 2 <6 <2 <3 < 2 < 4 < 10 < 2 <2 < 17 <6 <3 08/06/19 - 08/27/19 < 139 < 30 <2 <2 < 6 < 2 < 4 < 2 <3 <8 <2 < 2 < 15 <6 <3 09/03/19 - 09/24/19 < 145 < 26 <2 <2 < 5 < 2 < 3 < 2 < 3 <5 <1 < 2 < 10 <4 8 +/-4 10/01/19 - 10/29/19 < 144 < 25 <2 <2 <6 < 2 < 4 < 2 < 3 <6 <2 < 2 < 13 < 5 < 3 11/05/19 - 11/25/19 < 137 < 32 < 2 <2 <6 < 2 < 4 < 2 < 4 <8 <2 < 2 < 16 < 6 <4 12/03/19 - 12/31/19 < 139 < 26 <1 <2 < 5 <2 <3 <2 < 3 < 9 < 1 <2 < 16 < 6 < 3 AVERAGE - - - - - - - - - - - - - 8 +/- 0 C-18

TABLE C-11 GAMMA SPECTROSCOPIC ANALYSIS OF FISH SUSQUEHANNA STEAM ELECTRIC STATION, 2019 Results in pCi/kg (wet) +/- 2 sigma COLLECTION SITE DATE K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Cs-134 Cs-137 2H Channel Catfish 05/22/19 3669 +/- 803 < 55 < 54 < 149 < 57 < 96 < 48 < 43 Smallmouth Bass 05/22/19 3728 +/- 764 < 43 < 42 < 134 < 49 < 95 < 43 < 43 White Sucker 05/22/19 3890 +/- 913 < 51 < 40 < 153 < 52 < 104 < 42 < 49 Channel Catfish 10/11/19 2889 +/- 988 < 53 < 51 < 175 < 51 < 93 < 53 < 52 Smallmouth Bass 10/11/19 3422 +/- 1108 < 65 < 65 < 167 < 66 < 142 < 59 < 76 Shorthead Redhorse 10/11/19 4485 +/- 1165 < 76 < 89 < 231 < 67 < 222 < 88 < 77 AVERAGE 3681 +/- 1053 - - - - - - -

IND Channel Catfish 05/21/19 4393 +/- 957 < 42 < 57 < 182 < 63 < 119 < 52 < 51 White Sucker 05/21/19 3354 +/- 909 < 55 < 46 < 201 < 58 < 89 < 47 < 49 Smallmouth Bass 05/21/19 3880 +/- 1020 < 67 < 43 < 186 < 60 < 124 < 60 < 50 Shorthead Redhorse 10/10/19 3870 +/- 669 < 41 < 45 < 91 < 49 < 66 < 31 < 43 Smallmouth Bass 10/10/19 4034 +/- 1129 < 70 < 62 < 202 < 62 < 136 < 64 < 71 Channel Catfish 10/10/19 3863 +/- 921 < 33 < 55 < 107 < 54 < 104 < 55 < 44 AVERAGE 3899 +/- 670 - - - - - - -

LTAW Largemouth Bass 10/11/19 4219 +/- 1036 < 49 < 44 < 177 < 66 < 130 < 51 < 62 Gizzard Shad 10/11/19 3953 +/- 1134 < 61 < 76 < 199 < 74 < 170 < 86 < 68 AVERAGE 4086 +/- 376 - - - - - - -

C-19

TABLE C-12 GAMMA SPECTROSCOPIC ANALYSES OF SHORELINE SEDIMENT SUSQUEHANNA STEAM ELECTRIC STATION, 2019 Results in pCi/kg (dry) +/- 2 sigma COLLECTION SITE DATE K-40 Cs-134 Cs-137 Ra-226 Ac-228 Th-228 2B 04/30/19 16100 +/- 2265 < 78 < 120 < 1686 1438 +/- 366 1143 +/- 203 09/30/19 12590 +/- 1434 < 61 < 80 < 1160 1119 +/- 273 1107 +/- 132 AVERAGE 14345 +/- 4964 - - - 1279 +/- 451 1125 +/- 51 7B 04/30/19 13510 +/- 1849 < 78 < 110 < 1882 870 +/- 295 953 +/- 201 09/30/19 10610 +/- 1392 < 64 < 84 < 1772 965 +/- 347 980 +/- 171 AVERAGE 12060 +/- 4101 - - - 917 +/- 136 966 +/- 38 12F 04/30/19 8495 +/- 1252 < 116 < 94 < 2106 1002 +/- 338 1035 +/- 131 09/30/19 11140 +/- 1201 < 86 < 85 < 1855 1305 +/- 246 1111 +/- 162 AVERAGE 9818 +/- 3741 - - - 1154 +/- 429 1073 +/- 107 C-20

FIGURE C GROSS BETA ACTIVITY IN AIR PARTICULATES E-3 pCi/m3 500 450 PREOPERATIONAL CHINESE OPERATIONAL WEAPONS TEST A - 06/17/74 400 A B - 09/26/76 C - 11/17/76 350 D - 09/17/77 E - 03/14/78 300 F - 10/15/80 D

250 Unit 1 E Criticality 200 09/10/1982 C

150 CHERNOBYL Unit 2 100 F Criticality 4/26/86 B 05/08/1984 50 0

Indicator Control C-21

FIGURE C AMBIENT RADIATION LEVELS Dose Rate (mrem/STD Qtr)

BASED ON ENVIRONMENTAL DOSIMETRY DATA 50 45 PREOPERATIONAL OPERATIONAL 40 35 30 25 20 15 10 Unit 1 Criticality Unit 2 Changed from TLD 09/10/1982 Criticality to OSLD system 05/08/1984 01/18/12 5

0 1973 1975 1977 1979 1981 1983 1985 1987 1989 1991 1993 1995 1997 1999 2001 2003 2005 2007 2009 2011 2013 2015 2017 2019 Indicator Control C-22

FIGURE C IODINE-131 ACTIVITY IN MILK pCi/L 100 A

90 PRE-OPERATIONAL OPERATIONAL CHINESE 80 WEAPONS TEST A - 09/12/77 B - 03/14/78 70 C - 10/15/80 60 50 40 CHERNOBYL 4/26/86 30 Unit 1 20 Criticality Unit 2 09/10/1982 Criticality 05/08/1984 10 B C 0

Indicator Control C-23

FIGURE C ANNUAL AVERAGE TRITIUM ACTIVITY IN PRECIPITATION AND SURFACE WATER VERSUS GROUND WATER pCi/L 1200 1100 1000 900 800 700 600 500 400 300 200 100 0

-100 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2017 2018 2019 Investigation Level MDC C-24

FIGURE C GROSS BETA ACTIVITY IN DRINKING WATER pCi/L 10 9

PREOPERATIONAL OPERATIONAL 8

7 6

5 4

3 2

Unit 1 Criticality 09/10/1982 1

Unit 2 Criticality 05/08/1984 0

C-25

FIGURE C TRITIUM ACTIVITY IN SURFACE WATER pCi/L 3500 PREOPERATIONAL OPERATIONAL 2500 1500 500 Unit 1 Unit 2 Criticality Criticality 09/10/1982 05/08/1984

-500 Indicator Control C-26

APPENDIX D

SUMMARY

OF RESULTS FROM ANALYTICS, ENVIRONMENTAL RESOURCE ASSOCIATES (ERA),

AND DEPARTMENT OF ENERGY (DOE) - MIXED ANALYTE PERFORMANCE EVALUATION PROGRAM (MAPEP)

D-1

Table D-1 Analytics Environmental Radioactivity Cross Check Program Teledyne Brown Engineering Environmental Services TBE Identification Known Ratio of TBE to Month/Year Matrix Nuclide Units Reported Evaluation (b)

Number Value (a) Analytics Result Value March 2019 E12468A Milk Sr-89 pCi/L 87.1 96 0.91 A Sr-90 pCi/L 12.6 12.6 1.00 A E12469A Milk Ce-141 pCi/L 113 117 0.97 A Co-58 pCi/L 153 143 1.07 A Co-60 pCi/L 289 299 0.97 A Cr-51 pCi/L 233 293 0.80 A Cs-134 pCi/L 147 160 0.92 A Cs-137 pCi/L 193 196 0.98 A Fe-59 pCi/L 153 159 0.96 A I-131 pCi/L 91.5 89.5 1.02 A Mn-54 pCi/L 149 143 1.04 A Zn-65 pCi/L 209 220 0.95 A E12470 Charcoal I-131 pCi 77.5 75.2 1.03 A E12471 AP Ce-141 pCi 60.7 70.2 0.87 A Co-58 pCi 87.9 85.8 1.02 A Co-60 pCi 175 179 0.98 A Cr-51 pCi 165 176 0.94 A Cs-134 pCi 91.2 95.9 0.95 A Cs-137 pCi 120 118 1.02 A Fe-59 pCi 108 95.3 1.13 A Mn-54 pCi 94.2 85.7 1.10 A Zn-65 pCi 102 132 0.77 W E12472 Water Fe-55 pCi/L 2230 1920 1.16 A E12473 Soil Ce-141 pCi/g 0.189 0.183 1.03 A Co-58 pCi/g 0.209 0.224 0.93 A Co-60 pCi/g 0.481 0.466 1.03 A Cr-51 pCi/g 0.522 0.457 1.14 A Cs-134 pCi/g 0.218 0.250 0.87 A Cs-137 pCi/g 0.370 0.381 0.97 A Fe-59 pCi/g 0.263 0.248 1.06 A Mn-54 pCi/g 0.248 0.223 1.11 A Zn-65 pCi/g 0.371 0.344 1.08 A E12474 AP Sr-89 pCi 88.3 95.2 0.93 A Sr-90 pCi 11.7 12.5 0.94 A August 2019 E12562 Soil Sr-90 pCi/g 4.710 6.710 0.70 W (a) The Analytics known value is equal to 100% of the parameter present in the standard as determined by gravimetric and/or volumetric measurements made during standard preparation (b) Analytics evaluation based on TBE internal QC limits:

A = Acceptable - reported result falls within ratio limits of 0.80-1.20 W = Acceptable with warning - reported result falls within 0.70-0.80 or 1.20-1.30 N = Not Acceptable - reported result falls outside the ratio limits of < 0.70 and > 1.30 D-2

Table D-1 Analytics Environmental Radioactivity Cross Check Program Teledyne Brown Engineering Environmental Services TBE Identification Known Ratio of TBE to Month/Year Matrix Nuclide Units Reported Evaluation (b)

Number Value (a) Analytics Result Value September 2019 E12475 Milk Sr-89 pCi/L 70.0 93.9 0.75 W Sr-90 pCi/L 12.0 12.9 0.93 A E12476 Milk Ce-141 pCi/L 150 167 0.90 A Co-58 pCi/L 170 175 0.97 A Co-60 pCi/L 211 211 1.00 A Cr-51 pCi/L 323 331 0.98 A Cs-134 pCi/L 180 207 0.87 A Cs-137 pCi/L 147 151 0.97 A Fe-59 pCi/L 156 148 1.05 A I-131 pCi/L 81.1 92.1 0.88 A Mn-54 pCi/L 160 154 1.04 A Zn-65 pCi/L 303 293 1.03 A E12477 Charcoal I-131 pCi 95.9 95.1 1.01 A E12478 AP Ce-141 pCi 129 138 0.93 A Co-58 pCi 128 145 0.88 A Co-60 pCi 181 174 1.04 A Cr-51 pCi 292 274 1.07 A Cs-134 pCi 166 171 0.97 A Cs-137 pCi 115 125 0.92 A Fe-59 pCi 119 123 0.97 A Mn-54 pCi 129 128 1.01 A Zn-65 pCi 230 242 0.95 A E12479 Water Fe-55 pCi/L 1810 1850 0.98 A E12480 Soil Ce-141 pCi/g 0.305 0.276 1.10 A Co-58 pCi/g 0.270 0.289 0.93 A Co-60 pCi/g 0.358 0.348 1.03 A Cr-51 pCi/g 0.765 0.547 1.40 N(1)

Cs-134 pCi/g 0.327 0.343 0.95 A Cs-137 pCi/g 0.308 0.321 0.96 A Fe-59 pCi/g 0.257 0.245 1.05 A Mn-54 pCi/g 0.274 0.255 1.07 A Zn-65 pCi/g 0.536 0.485 1.11 A E12481 AP Sr-89 pCi 95.9 91.9 1.04 A Sr-90 pCi 12.3 12.6 0.97 A E12563 Soil Sr-90 pCi/g 0.392 0.360 1.09 A (a) The Analytics known value is equal to 100% of the parameter present in the standard as determined by gravimetric and/or volumetric measurements made during standard preparation (b) Analytics evaluation based on TBE internal QC limits:

A = Acceptable - reported result falls within ratio limits of 0.80-1.20 W = Acceptable with warning - reported result falls within 0.70-0.80 or 1.20-1.30 N = Not Acceptable - reported result falls outside the ratio limits of < 0.70 and > 1.30 (1) See NCR 19-27 D-3

Table D-2 DOE's Mixed Analyte Performance Evaluation Program (MAPEP)

Teledyne Brown Engineering Environmental Services TBE Identification Known Acceptance Month/Year Matrix Nuclide Units Reported Evaluation (b)

Number Value (a) Range Value February 2019 19-GrF40 AP Gross Alpha Bq/sample 0.184 0.528 0.158 - 0.898 A Gross Beta Bq/sample 0.785 0.948 0.474 - 1.422 A 19-MaS40 Soil Ni-63 Bq/kg 420 519.0 363 - 675 A Sr-90 Bq/kg (1) NR(3) 19-MaW40 Water Am-241 Bq/L 0.764 0.582 0.407 - 0.757 N(4)

Ni-63 Bq/L 4.72 5.8 4.1 - 7.5 A Pu-238 Bq/L 0.443 0.451 0.316 - 0.586 A Pu-239/240 Bq/L -0.00161 0.0045 (2) A 19-RdF40 AP U-234/233 Bq/sample 0.1138 0.106 0.074 - 0.138 A U-238 Bq/sample 0.107 0.110 0.077 - 0.143 A 19-RdV40 Vegetation Cs-134 Bq/sample 2.14 2.44 1.71 - 3.17 A Cs-137 Bq/sample 2.22 2.30 1.61 - 2.99 A Co-57 Bq/sample 2.16 2.07 1.45 - 2.69 A Co-60 Bq/sample 0.02382 (1) A Mn-54 Bq/sample -0.03607 (1) A Sr-90 Bq/sample -0.1060 (1) N(5)

Zn-65 Bq/sample 1.35 1.71 1.20 - 2.22 W August 2019 19-GrF41 AP Gross Alpha Bq/sample 0.192 0.528 0.158 - 0.898 W Gross Beta Bq/sample 0.722 0.937 0.469 - 1.406 A 19-MaS41 Soil Ni-63 Bq/kg 436 629 440 - 818 N(6)

Sr-90 Bq/kg 444 572 400 - 744 W 19-MaW41 Water Am-241 Bq/L NR(7)

Ni-63 Bq/L 7.28 9.7 6.8 - 12.6 W Pu-238 Bq/L 0.0207 0.0063 (2) A Pu-239/240 Bq/L 0.741 0.727 0.509 - 0.945 A 19-RdF41 AP U-234/233 Bq/sample 0.0966 0.093 0.065 - 0.121 A U-238 Bq/sample 0.0852 0.096 0.067-0.125 A 19-RdV41 Vegetation Cs-134 Bq/sample 0.0197 (1) A Cs-137 Bq/sample 3.21 3.28 2.30 - 4.26 A Co-57 Bq/sample 4.62 4.57 3.20 - 5.94 A Co-60 Bq/sample 4.88 5.30 3.71 - 6.89 A Mn-54 Bq/sample 4.54 4.49 3.14 - 5.84 A Sr-90 Bq/sample 0.889 1.00 0.70 - 1.30 A Zn-65 Bq/sample 2.78 2.85 2.00 - 3.71 A (a) The MAPEP known value is equal to 100% of the parameter present in the standard as determined by gravimetric and/or volumetric measurements made during standard preparation (b) DOE/MAPEP evaluation:

A = Acceptable - reported result falls within ratio limits of 0.80-1.20 W = Acceptable with warning - reported result falls within 0.70-0.80 or 1.20-1.30 N = Not Acceptable - reported result falls outside the ratio limits of < 0.70 and > 1.30 (1) False positive test (2) Sensitivity evaluation (3) See NCR 19-12 (4) See NCR 19-13 (5) See NCR 19-14 (6) See NCR 19-25 (7) See NCR 19-26 D-4

Table D-3 ERA Environmental Radioactivity Cross Check Program Teledyne Brown Engineering Environmental Services TBE Identification Known Acceptance Month/Year Matrix Nuclide Units Reported Evaluation (b)

Number Value (a) Limits Value April 2019 Rad-117 Water Ba-133 pCi/L 26.3 24.1 18.6 - 27.8 A Cs-134 pCi/L 15.2 12.1 8.39 - 14.4 N(1)

Cs-137 pCi/L 33.6 33.1 28.8 - 39.4 A Co-60 pCi/L 11.9 11.5 8.67 - 15.5 A Zn-65 pCi/L 87.1 89.2 80.3 - 107 A GR-A pCi/L 19 19.3 9.56 - 26.5 A GR-B pCi/L 20.2 29.9 19.1 - 37.7 A U-Nat pCi/L 55.5 55.9 45.6 - 61.5 A H-3 pCi/L 21500 21400 18700 - 23500 A (2)

Sr-89 pCi/L 44.9 33.3 24.5 - 40.1 N Sr-90 pCi/L 24.5 26.3 19.0 - 30.7 A I-131 pCi/L 28.9 28.4 23.6 - 33.3 A October 2019 Rad-119 Water Ba-133 pCi/L 42.7 43.8 35.7 - 48.8 A Cs-134 pCi/L 53.5 55.9 45.2 - 61.5 A Cs-137 pCi/L 77.7 78.7 70.8 - 89.2 A Co-60 pCi/L 51.5 53.4 48.1 - 61.3 A Zn-65 pCi/L 36.6 34.0 28.5 - 43.1 A GR-A pCi/L 40.5 27.6 14.0 - 36.3 N(3)

GR-B pCi/L 36.3 39.8 26.4 - 47.3 A U-Nat pCi/L 27.66 28.0 22.6 - 31.1 A H-3 pCi/L 22800 23400 20500 - 25700 A Sr-89 pCi/L 47.1 45.5 35.4 - 52.7 A Sr-90 pCi/L 32.5 26.5 19.2 - 30.9 N(4)

I-131 pCi/L 26.0 23.9 19.8 - 28.4 A December 2019 QR 120419D Water Sr-90 pCi/L 20.1 18.6 13.2 - 22.1 A (a) The ERA known value is equal to 100% of the parameter present in the standard as determined by gravimetric and/or volumetric measurements made during standard preparation.

(b) ERA evaluation:

A = Acceptable - Reported value falls within the Acceptance Limits N = Not Acceptable - Reported value falls outside of the Acceptance Limits (1) See NCR 19-10 (2) See NCR 19-11 (3) See NCR 19-23 (4) See NCR 19-24 D-5

APPENDIX E REMP SAMPLE EQUIPMENT OPERABILITY TRENDING E-1

TABLE E-1 REMP SAMPLING EQUIPMENT OPERABILITY TRENDING SUSQUEHANNA STEAM ELECTRIC STATION Percent (%) Operability SAMPLING MEDIA SAMPLE LOCATION DESCRIPTION 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 Air Particulate 3S2 SSES Backup Met. Tower 99.9 99.3 98.9 99.9 100 99 100 99.9 99.9 100.0

& Charcoal 12S1 West Building 99.9 100 99.9 99.9 100 100 100 99.1 99.7 99.9 Former Laydown Area, West of Confers 13S6 Lane 100 99.7 99.1 99.9 100 97 100 100 99.9 99.9 12E1 Berwick Hospital 100 100 99.9 100.0 100 98 99.1 100 100 100 No longer 6G1 Freeland Substation 100 100 99.9 99.9 100 90* 100 100 100 in service PPL System Facilities Center, Humboldt 8G1 Industrial Park 99.7 100 99.8 99.9 100 100 99.2 99.9 99.9 99.9 E of Confers Lane, 10S3 S of Towers Club - - - - - - 100 99.5 99.9 99.2 Transmission Line, 9B1 E of Route 11 - - - - - - 100 99.9 99.9 99.9 Drinking Water 12H2 Danville Water Company 100 100 100 100.0 100 100 100 100 100 98.1 Surface Water 2S7 Cooling Tower Blowdown Discharge Line 98.0 99.1 98.1 98.1 69** 100 99.1 100 100 99.9 6S6 River Water Intake Line 100 95.5 93.4 93.2 93 98 99.7 99.9 99.9 99.9

Planned power outage by Electric Utilities

- Auto- Compsite sampler problems, March through June. New Auto- Compsite sampler installed in July.

E-2

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