Text

Annual Radiological Environmental Operating Report (PLA-7769)
	ML19105A483
Person / Time
Site:	Susquehanna
Issue date:	04/15/2019
From:	Cimorelli K; Susquehanna
To:	; Document Control Desk, Office of Nuclear Reactor Regulation
References
	PLA-7769
	Download: ML19105A483 (115)
	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 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-7769 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 2018 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:

2018 Annual Radiological Environmental Operating Report Copy: NRC Region I Ms. T. E. Hood, NRC Project Manager Ms. J. Tobin, NRC Project Manager Ms. L. H. Micewski, NRC Sr. Resident Inspector Mr. M. Shields, PA DEP/BRP Mr. J. Furia, NRC Region 1 Health Physicist

Attachment to PLA-7769 2018 Annual Radiological Environmental Operating Report

SUSQUEHANNA STEAM ELECTRIC STATION UNITS 1 and2 Annual Radiological Environmental Operating Report 2018 Prepared by:

2~ ~~*

F.J. Hickey, Sr. Heffthrhysicist Reviewed by:

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

Susquehanna Nuclear, LLC 769 Salem Boulevard Berwick, Pennsylvania 18603

SUSQUEHANNA STEAM ELECTRIC STATION Units 1 & 2 2018 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT JANUARY 1 TO DECEMBER 31, 2018 Susquehanna Nuclear, LLC Berwick, PA April, 2019

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 ............................................................................................ 9 C. Program Changes ............................................................................................... 9 D. Quality Assurance Program .............................................................................. 20 E. Summary of Results - Inter-Laboratory Comparison Program ......................... 20 IV. Results and Discussion ............................................................................................... 23 A. Atmospheric....................................................................................................... 24

1. Air Particulates ........................................................................................ 24

2. Air Iodine ................................................................................................. 25 B. Direct Radiation ................................................................................................. 25 C. Terrestrial .......................................................................................................... 26

1. Milk.......................................................................................................... 26

2. Groundwater ........................................................................................... 27

3. Drinking Water ........................................................................................ 29

4. Food Products......................................................................................... 30 D. Aquatic .............................................................................................................. 31

1. Surface Water ......................................................................................... 31

2. Fish ......................................................................................................... 33

3. Shoreline Sediment................................................................................. 34 E. Land Use Census .............................................................................................. 35 V. Annotations to Previous AREOR .................................................................................. 36 VI. Conclusions ................................................................................................................. 36 VII. References ................................................................................................................. 38

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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-15 Table C-8 Gross Beta, Tritium and Gamma Spectroscopic Analyses of Drinking Water Susquehanna Steam Electric Station ............................................ C-16 Table C-9 Gamma Spectroscopic Analyses of Food Products (Fruits, Vegetables, and Broadleaf) Susquehanna Steam Electric Station .......... C-17 Table C-10 Tritium and Gamma Spectroscopic Analyses of Surface Water Susquehanna Steam Electric Station ....................................................... C-19 Table C-11 Gamma Spectroscopic Analyses of Fish Susquehanna Steam Electric Station ...................................................................................................... C-21 Table C-12 Gamma Spectroscopic Analyses of Shoreline Sediment Susquehanna Steam Electric Station .............................................................................. C-22 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-6 Table D-3 ERA Environmental Radioactivity Cross Check Program Teledyne Brown Engineering Environmental Services ............................................ D-7

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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-23 Figure C-2 Ambient Radiation Levels Based on Environmental Dosimetry Data ............................................................................................................ C-24 Figure C-3 Iodine-131 Activity in Milk ........................................................................... C-25 Figure C-4 Annual Average Tritium Activity in Precipitation and Surface Water Versus Ground Water ...................................................................... C-26

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LIST OF FIGURES (contd)

Figure C-5 Gross Beta Activity in Drinking Water ......................................................... C-27 Figure C-6 Tritium Activity in Surface Water ................................................................. C-28

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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 2018. Teledyne Brown Engineering (TBE) was responsible for the analysis of environmental samples during 2018. The results are discussed in this report. Landauer provided the dosimetry services for SSES during 2018.

This Annual Radiological Environmental Operating Report (AREOR) conducted for SSES covers the period January 1, 2018 through December 31, 2018. During that time period, 1444 analyses were performed on 1234 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 3.17E-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 2018 average concentration of tritium in the cooling tower blowdown water and the 2018 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 2018 was 35.3 curies.

The 2018 average dilution factor for the Susquehanna River was 1,036, based on the annual average river flow of 1.14E+07 gpm and the annual average cooling tower blowdown flow of 1.10E+04 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 2018 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 2018 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 and naturally occurring thorium-228 (Th-228) 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.

Soil sample collection was discontinued in 2018. Historical and preoperational data consistently indicates that Cs-137 previously detected in the soil is due to residual fallout from atmospheric nuclear weapons testing in the 1970s and early 1980s, and the Chernobyl and Fukushima events, and is not attributable to station operations.

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 K-40 and Th-228 was detected in several samples at levels that are 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 Ra-226, 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, 2018, 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.

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 Surface water auto-composite sampler at station 6S6 was removed from service for approximately 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months on the following dates for routine maintenance (sample line cleaning): May 21, 2018; June 18, 2018; September 17, 2018; December 17, 2018. The auto-composite sampler was successfully returned to service following the routine maintenance work on each of the dates referenced above.

See Exceptions Table 2018 REMP Atypical Sampling Occurrences B. Program Changes The program changes for 2018 are as follows. Changes were part of REMP program consolidation efforts by Talen Energy.

Soil collection from all stations was discontinued in 2018.

Precipitation collection from stations 3S2, 12S1, 8G1, and 10S3 was discontinued as of May 30th 2018.

Air particulate and Charcoal collection from station 6G1 was discontinued as of May 30th 2018.

Groundwater collection from stations 12F3, 2S2, 4S4, 6S10, and 11S2 was discontinued as of May 30th 2018.

Surface water collection from stations 4S7, LTAW, 5S12, and 7S12 was discontinued as of May 30th 2018.

Exceptions Table 2018 REMP Atypical Sampling Occurrences Date Sample Location Sample Period Corrective Action Type Code(s) Reason for Occurrence(s)

Air 10S3 12/27/17 to 01/03/18 CA #18-01 CR 2018-00148 Flow rate upon arrival was 1.6 cfm, below the 01/03/18: Loose fitting was tightened, and air procedural range of 2.0-2.4 cfm. This was due to flow restored to 2.2 cfm.

a loose fitting on the pump. 01/03/18: Operability verified @ 0925 hours0.0107 days 0.257 hours 0.00153 weeks 3.519625e-4 months .

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

20,100 cf.

Air 10S3 01/03/18 to 01/10/18 (loss of 0.2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months ) CA #18-03 CR 2018-01082 Power outage date and time unknown. 01/10/18: No action required. Air monitor Loss of 0.2 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.

JAN 01/10/18: Operability verified @ 0919 hours0.0106 days 0.255 hours 0.00152 weeks 3.496795e-4 months .

Non-continuous sampler operation.

Ideal sample collected for sample period:

22,500 cf.

Surface 2S7 01/09/18 to 01/15/18 (week 3 January composite) CA #18-04 CR 2018-01333 Water ACS automatically shut off on 01/14/18 @ 01/15/18: Sample line tubing was cleared of air.

approximately 0300 hours0.00347 days 0.0833 hours 4.960317e-4 weeks 1.1415e-4 months when the float weight Sampler was calibrated to within procedural was tripped. Greater than normal volume of water range.

collected for week, possibly due to air bubbles in 01/15/18: Operability verified @ 1344 hours0.0156 days 0.373 hours 0.00222 weeks 5.11392e-4 months .

the sample line.

Ideal sample collected for sample period.

Exceptions Table (continued)

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

Surface 2S7 01/23/18 to 01/30/18 (week 1 February CA #18-05 CR 2018-02015 Water composite) 01/30/18: Grab samples collected at 2S7 and ACS sample line presumably blocked with 6S6 for comparative analysis.

sediment and will not draw liquid. 02/01/18: FIN unsuccessful in clearing sample JAN (cont.)

Calibration/volume verification not possible due line. Sample line switched to Chemistrys side to lack of water in line. of sampling station. Delayed start for week 2 February composite.

02/01/18: Operability verified @ 1354 hours0.0157 days 0.376 hours 0.00224 weeks 5.15197e-4 months .

Ideal sample collected for sample period.

Air 10S3 01/31/18 to 02/06/18 (loss of 0.8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months ) CA #18-06 CR 2018-02429 Power outage date and time unknown. 02/06/18: No action required. Air monitor Loss of 0.8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months as determined by timer box resumed normal operation when power was during weekly collection. restored.

02/06/18: 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:

19,600 cf.

FEB Surface 6S6 02/13/18 to 02/20/18 (week 4 February CA #18-07 CR 2018-02986 Water composite) 02/20/18: CR generated by I&C. No corrective ACS out of service for approximately 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months for action required since this was routine routine maintenance by I&C. maintenance. PM date will be noted on sample collection form.

02/20/18: Operability verified @ 1132 hours0.0131 days 0.314 hours 0.00187 weeks 4.30726e-4 months Ideal sample collected for sample period.

Exceptions Table (continued)

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

Air 3S2 02/14/18 to 02/21/18 CA #18-08 CR 2018-03069 Timer box #6 failed to advance past 1.0 for 02/21/18: Timer box #6 was replaced with timer sample period. Timer box malfunction did not box #2.

FEB (cont.)

affect normal sample collection. 02/21/18: Operability verified @ 0829 hours0.00959 days 0.23 hours 0.00137 weeks 3.154345e-4 months .

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

21,200 cf.

Air 12S1 02/28/18 to 03/06/18 (loss of 13.3 hours3.472222e-5 days 8.333333e-4 hours 4.960317e-6 weeks 1.1415e-6 months ) CA #18-09 CR 2018-03535 12kV Power outage occurred @ 2200 hours0.0255 days 0.611 hours 0.00364 weeks 8.371e-4 months on 03/02/18: No action required. Air monitor 03/01/18. resumed normal operation when power was Loss of 13.3 hours3.472222e-5 days 8.333333e-4 hours 4.960317e-6 weeks 1.1415e-6 months as determined by timer box. restored.

03/02/18: Operability verified @ 1158 hours0.0134 days 0.322 hours 0.00191 weeks 4.40619e-4 months .

Non-continuous sampler operation.

Ideal sample collected for sample period:

16,400 cf.

MAR Air 12S1 03/06/18 to 03/14/18 (loss of 9.0 hours0 days 0 hours 0 weeks 0 months ) CA #18-10 CR 2018-03856 12kV Power outage due to scheduled repair work 03/10/18: No action required. Air monitor (RLW02158245) occurred on 03/10/18. resumed normal operation when power was Loss of 9.0 hours0 days 0 hours 0 weeks 0 months as determined by timer box. restored.

03/12/18: Operability verified @ 0920 hours0.0106 days 0.256 hours 0.00152 weeks 3.5006e-4 months .

Non-continuous sampler operation.

Ideal sample collected for sample period:

22,700 cf.

Exceptions Table (continued)

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

Air 13S6 & 03/06/18 to 03/14/18 (loss of 4.5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months ) CA #18-11 CR 2018-04011 13S6Q Power outage date and time unknown. 03/14/18: No action required. Air monitors Loss of 4.5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months as determined by timer boxes resumed normal operation when power was during weekly collection. restored.

MAR (cont.)

03/14/18: Operability verified @ 0802 hours0.00928 days 0.223 hours 0.00133 weeks 3.05161e-4 months for Non-continuous sampler operation. 13S6 and 13S6Q.

Ideal samples collected for sample period:

24,800 cf.- 13S6 25,100 cf.- 13S6Q Air 9B1 03/28/18 to 04/04/18 CA #18-12 CR 2018-05238 Air flow verification failure due to defective 04/05/18: All four O-rings and one (quick coupler on air sampler. Defective coupler connect) coupler were replaced. Equipment allowed a small amount of air to bypass the restored to service and air flow verification sample head. Air flow verification of <0.1 cf/30 successfully performed.

APR seconds unachievable. 04/05/18: Operability verified @ 1530 hours0.0177 days 0.425 hours 0.00253 weeks 5.82165e-4 months .

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

22,600 cf.

Air 12S1 04/25/18 to 05/02/18 CA #18-13 CR 2018-07291 Flow rate upon arrival was 1.8 cfm, below the 05/02/18: Pump was replaced, and air flow procedural range of 2.0-2.4 cfm. Procedural verification was performed.

range unachievable with pump settings at 05/02/18: Operability verified @ 0931 hours0.0108 days 0.259 hours 0.00154 weeks 3.542455e-4 months .

MAY maximum due to pump malfunction.

Ideal sample collected for sample period:

Continuous sampling during sample period. 17,000 cf.

Exceptions Table (continued)

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

Air 12S1 05/09/18 to 05/16/18 (momentary loss of 12kV CA #18-14 CR 2018-07883 power) 05/15/18: No action required. Air monitor Momentary loss of power on 05/15/18. resumed normal operation when power was No loss of sampling time as determined by timer restored.

box during weekly collection. 05/16/18: Operability verified @ 0839 hours0.00971 days 0.233 hours 0.00139 weeks 3.192395e-4 months .

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

21,900 cf.

Air 10S3 05/09/18 to 05/16/18 (loss of 3.9 hours1.041667e-4 days 0.0025 hours 1.488095e-5 weeks 3.4245e-6 months ) CA #18-15 CR 2018-07949 Power outage date and time unknown. 05/16/18: No action required. Air monitor Loss of 3.9 hours1.041667e-4 days 0.0025 hours 1.488095e-5 weeks 3.4245e-6 months as determined by timer box resumed normal operation when power was MAY (cont.)

during weekly collection. restored.

05/16/18: Operability verified @ 0852 hours0.00986 days 0.237 hours 0.00141 weeks 3.24186e-4 months .

Non-continuous sampler operation.

Ideal sample collected for sample period:

21,300 cf.

Air 3S2 05/23/18 to 05/30/18 CA #18-16 CR 2018-08622 Timer box failed to advance past 0.1 for sample 05/30/18: Timer box was placed away from period. Due to placement and pump vibration, the pump and was monitored.

power toggle was bumped to the off position. 05/30/18: Operability verified @ 0749 hours0.00867 days 0.208 hours 0.00124 weeks 2.849945e-4 months .

Timer box malfunction did not affect normal sample collection. Ideal sample collected for sample period:

21,700 cf.

Continuous sampling during sample period.

Exceptions Table (continued)

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

Surface 2S7 05/30/18 (week 1 June composite) CA #18-17 OP 142-001 Water CTBD secured on 05/30/18 for clean out of 05/30/18: No corrective action required.

MAY (cont.)

MH-PD-07. Sampler maintained normal operation while blowdown was secured.

No effect on continuous sampler operation. 05/30/18: Operability verified @ 0912 hours0.0106 days 0.253 hours 0.00151 weeks 3.47016e-4 months .

Ideal sample collected for sample periods.

Surface 6S6 06/05/18 to 06/12/18 (week 2 June composite) CA #18-18 CR 2018-09248 Water Diminished sample flow (<0.1 gpm) at ACS as 06/12/18: Adequate sample volume collected discovered during weekly collection. during sample period. Maintenance requested.

06/18/18: Maintenance performed by I&C and sample flow restored to 1.5 gpm.

06/19/18: Operability verified @ 0843 hours0.00976 days 0.234 hours 0.00139 weeks 3.207615e-4 months .

Ideal sample collected for sample periods.

JUN Air 12S1 06/13/18 to 06/20/18 (momentary loss of 12kV CA #18-19 CR 2018-09406 power) 06/14/18: No action required. Air monitor Momentary loss of power on 06/14/18. resumed normal operation when power was No loss of sampling time as determined by timer restored.

box. 06/14/18: Operability verified @ 1512 hours0.0175 days 0.42 hours 0.0025 weeks 5.75316e-4 months .

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

21,700 cf.

Exceptions Table (continued)

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

Air 12S1 06/20/18 to 06/27/18 CA #18-20 CR 2018-09862 Timer box failed to advance for sample period due 06/27/18: Timer box reset button was fixed and to reset button being stuck in depressed state. monitored to ensure it was advancing.

06/27/18: Operability verified @ 0903 hours0.0105 days 0.251 hours 0.00149 weeks 3.435915e-4 months .

Continuous sampling during sample period.

Ideal sample collected for sample period:

21,600 cf.

JUN (cont.)

Air 12S1 06/27/18 to 07/03/18 (loss of 2.3 hours3.472222e-5 days 8.333333e-4 hours 4.960317e-6 weeks 1.1415e-6 months ) CA #18-21 CR 2018-09859 12kV Power outage occurred @ 1023 hours0.0118 days 0.284 hours 0.00169 weeks 3.892515e-4 months on 06/27/18: No action required. Air monitor 06/27/18. resumed normal operation when power was Loss of 2.3 hours3.472222e-5 days 8.333333e-4 hours 4.960317e-6 weeks 1.1415e-6 months as determined by timer box. restored.

06/27/18: Operability verified @ 1334 hours0.0154 days 0.371 hours 0.00221 weeks 5.07587e-4 months .

Non-continuous sampler operation.

Ideal sample collected for sample period:

17,900 cf.

Air 3S2 06/27/18 to 07/03/18 CA #18-22 CR 2018-10132 Timer box #2 failed to advance past 1.8 for 07/03/18: Timer box #2 replaced with timer box sample period. #6.

07/03/18: Operability verified @ 0900 hours0.0104 days 0.25 hours 0.00149 weeks 3.4245e-4 months .

Continuous sampling during sample period.

Ideal sample collected for sample period:

18,500 cf.

JUL Air 12S1 07/11/18 to 07/18/18 (momentary loss of 12kV CA #18-23 CR 2018-10553 power) 07/15/18: No action required. Air monitor Momentary loss of power on 07/15/18 @ 0715 resumed normal operation when power was hours and 0809 hours0.00936 days 0.225 hours 0.00134 weeks 3.078245e-4 months . restored.

07/17/18: Operability verified @ 0900 hours0.0104 days 0.25 hours 0.00149 weeks 3.4245e-4 months .

Non-continuous sampler operation.

Ideal sample collected for sample period:

23,300 cf.

Exceptions Table (continued)

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

Air 12S1 07/11/18 to 07/18/18 CA #18-24 CR 2018-10688 On 07/17/18 timer box #9 was found to be running 07/17/18: Timer box #9 replaced with timer box in reverse while performing operability verification #5.

following a momentary loss of 12 kV power on 07/17/18: Operability verified @ 0943 hours0.0109 days 0.262 hours 0.00156 weeks 3.588115e-4 months .

07/15/18.

Ideal sample collected for sample period:

Non-continuous sampler operation during sample 23,300 cf.

period due to momentary loss of 12 kV power on 07/15/18 (CA #18-23, CR 2018-10553).

Air 12S1 07/18/18 to 07/25/18 (momentary loss of 12kV CA #18-25 CR 2018-10930 power) 07/23/18: No action required. Air monitor Momentary loss of power on 07/23/18 @ 1300 resumed normal operation when power was JUL (cont.)

hours. restored.

No loss of sampling time as determined by timer 07/24/18: Operability verified @ 0925 hours0.0107 days 0.257 hours 0.00153 weeks 3.519625e-4 months .

box.

Ideal sample collected for sample period:

Non-continuous sampler operation. 23,800 cf.

Air 10S3 07/18/18 to 07/25/18 CA #18-26 CR 2018-11048 Flow rate upon arrival was 1.0 cfm, below the 07/25/18: Loose fitting was tightened, and air procedural range of 2.0-2.4 cfm. This was due to flow restored to 2.2 cfm.

a loose fitting on the pump. 07/25/18: Operability verified @ 0825 hours0.00955 days 0.229 hours 0.00136 weeks 3.139125e-4 months .

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

16,400 cf.

Exceptions Table (continued)

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

Air 12S1 07/25/18 to 08/01/18 (loss of 0.2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months ) CA #18-27 CR 2018-11066 12kV Power outage occurred on 07/25/18. 07/25/18: No action required. Air monitor Loss of 0.2 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 JUL (cont.)

restored.

Non-continuous sampler operation. 07/26/18: Operability verified @ 0820 hours0.00949 days 0.228 hours 0.00136 weeks 3.1201e-4 months .

Ideal sample collected for sample period:

23,700 cf.

Air 3S2, 07/25/18 to 08/01/18 CA #18-28 CR 2018-11422 13S6, Power outage dates and times unknown. 08/01/18: No action required. Air monitors 9B1 Loss of 2.5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months at 3S2 and 9B1, and loss of 2.7 resumed normal operation when power was hours at 13S6, as determined by timer boxes restored.

during weekly collection. 08/01/18: Operability verified @ 0801 hours0.00927 days 0.223 hours 0.00132 weeks 3.047805e-4 months for 3S2, @ 0814 hours0.00942 days 0.226 hours 0.00135 weeks 3.09727e-4 months for 13S6, and @ 1118 hours0.0129 days 0.311 hours 0.00185 weeks 4.25399e-4 months AUG Non-continuous sampler operation. for 9B1.

Ideal samples collected for sample period:

22,500 cf.- 3S2 22,200 cf.- 13S6 22,600 cf.- 9B1 Air 8G1 10/31/18 to 11/07/18 (loss of 1.1 hours1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months ) CA #18-29 CR 2018-15506 Power outage date and time unknown. 11/07/18: No action required. Air monitor Loss of 1.1 hours1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months as determined by timer box resumed normal operation when power was during weekly collection. restored.

NOV 11/07/18: Operability verified @ 1038 hours0.012 days 0.288 hours 0.00172 weeks 3.94959e-4 months .

Non-continuous sampler operation.

Ideal sample collected for sample period:

22,800 cf.

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, 164 out of 172 analyses performed met the specified acceptance criteria. Six analyses did not meet the specified acceptance criteria for the following reasons and were addressed through the TBE Corrective Action Program.

1. TBE was unable to report the February 2018 DOE MAPEP vegetation Sr-90 result due to QC failure and limited sample amount. (NCR 18-09)

2. The Analytics September 2018 milk Fe-59 result was evaluated as Not Acceptable (Ratio of TBE to known result at 133%). The reported value was 158 +/- 17.6 pCi/L and the known value was 119 +/- 19.9 pCi/L. No cause for the failure could be determined.

TBE has passed 24 of the previous 27 milk cross-check results since 2012. This sample was run in duplicate on a different detector with comparable results (162 +/- 16 pCi/L). NOTE:

TBEs 4th Qtr. result passed at 105%. (NCR 18-20)

3. The Analytics September milk I-131 result was evaluated as Not Acceptable (Ratio of TBE to known result at 143%). Due to a personnel change in the gamma prep lab, the sample was not prepped/counted in a timely manner such as to accommodate the I-131 8-day half-life. Analysts have been made aware of the urgency for this analysis and it will be monitored more closely by QA. NOTE: TBEs 4th Qtr. result passed at 101%

(NCR 18-24)

4. The Analytics September soil Cr-51 result was evaluated as Not Acceptable (Ratio of TBE to known result at 131%). As with #3 above, the sample was not prepped/counted in a timely manner such as to accommodate the Cr-51 27-day half-life. The same corrective action applies here as in #3. (NCR 18-21)

5. The MAPEP November vegetation Sr-90 result of 0.338 Bq/sample was evaluated as Not Acceptable (Lower acceptable range was 0.554 Bq/sample). It appears that there has been incomplete dissolution of Sr-90 due to the composition of the MAPEP vegetation matrix. To resolve this issue, the TBE-2018 procedure has been modified to add H2O2 to assist in breaking down the organic material that comprises this matrix. This corrective action will be monitored closely by QA. (NCR 18-25).

6. The ERA November 2018 water Sr-90 sample was evaluated as Not Acceptable. TBEs initial reported result of 36.8 pCi/L exceeded the upper acceptance range (22.9 - 36.4 pCi/L).

After reviewing the data for this sample, it was discovered that there was a typographical error at the time the results were entered at the ERA website. The correct result in LIMS of 36.2 should have been submitted instead. This result is within ERAs acceptance limits. In addition to the typo error, ERAs very stringent upper acceptance limit of 116% is not a reflection of TBEs ability to successfully perform this analysis. (NCR 18-23)

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 2018 REMP samples are divided into categories based on exposure pathways: atmospheric, direct radiation, terrestrial, and aquatic. The analytical results for the 2018 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 two control locations (6G1 and 8G1). Station 6G1 was discontinued after May 3th 2018. 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 5 to 23 E-3 pCi/m3 with an average concentration of 12 E-3 pCi/m3, and in 73 of 73 of the control location samples at concentrations ranging from 4 to 24 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 30 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 58 E-3 to 161 E-3 pCi/m3 with an average concentration of 97 E-3 pCi/m3, and in the six control location composites ranging in concentration from 90 to 108 E-3 pCi/m3 with an average concentration of 97 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 two control locations (6G1 and 8G1). Station 6G1 was discontinued after May 3th 2018. 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 2018, 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 16.3 milliroentgen per standard quarter. The annual average dose rate for the control locations was 14.4 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 2018 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 2018 are plotted.

Gamma Spectrometry Naturally occurring K-40 was detected in all 60 samples with concentrations for the 40 indicator location samples ranging from 1,055 to 1,623 pCi/L with an average concentration of 1,268 pCi/L, and the 20 control location sample concentrations ranging from 1,055 to 1,458 pCi/L with an average concentration of 1,277 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 14 indicator locations (2S2, 4S4, 6S10, 11S2, 1S3, 4S8, 4S9, 8S4, 7S10, 13S7, 2S8, 6S11A, 6S12 and 7S11) and one control location, (12F3).Stations 12F3, 2S2, 4S4, 6S10, and 11S2 were discontinued after May 30th 2018. Each sample was analyzed for H-3 and gamma emitters.

Tritium Tritium activity was detected above the minimum detectable concentration in 11 of the 48 indicator location samples with concentrations ranging from 147 to 354 pCi/L with an average concentration of 200 pCi/L. No H-3 was detected in the control location sample. The maximum preoperational level detected was 119 pCi/L. (Table C-6, Appendix C); Figure C Annual Average Tritium Activity (pCi/L) in Precipitation and Surface Water Versus Groundwater results from 2007 to 2018 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)

Naturally occurring Th-228 was detected in one of the 48 indicator samples at a concentration of 9 pCi/L. 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 four of the 12 drinking water samples. Sample concentrations ranged from 2 to 3 pCi/L with an average concentration of 3 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 2018 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 four indicator locations (3S3, 12F7, 11D1, and 11S6) and one control location (8G1) were collected throughout the growing season. All samples (fruit, vegetable, and broadleaf) were analyzed for gamma emitters and included soy beans, field corn, pumpkin, kale, swiss chard and collards.

Gamma Spectrometry Naturally occurring Be-7, attributed to cosmic ray activity in the atmosphere, was detected in 23 of the 34 indicator location samples with concentrations ranging from 313 to 1,038 pCi/kg wet with an average concentration of 581 pCi/kg wet, and in 11 of the control location samples with concentrations ranging from 246 to 850 pCi/kg wet with an average concentration of 540 pCi/kg wet. Preoperational data is not available for comparison.

Naturally occurring K-40 was detected in all 34 indicator location samples with concentrations ranging from 1,688 to 16,720 pCi/kg wet with an average concentration of 4,355 pCi/kg wet, and in all 15 control location samples with concentrations ranging from 2,599 to 4,927 pCi/kg wet with an average concentration of 3,815 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 six indicator locations (6S5, 2S7, LTAW, 4S7, 5S12, 5S9 and 7S12) and one control location (6S6). Stations 4S7, LTAW, 5S12, and 7S12 were discontinued after May 30th 2018. Samples were not collected at station 5S9 in 2018. Each sample was analyzed for H-3 and gamma emitters.

Tritium Tritium activity was detected in 16 of 33 indicator location samples with concentrations ranging from 169 to 6,170 pCi/L with an average concentration of 1,217 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 2018. 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 2018 are plotted.

Gamma Spectrometry Naturally occurring K-40 was detected in two of the indicator location samples with concentrations ranging from 45 pCi/L to 101 pCi/L with an average concentration of 73 pCi/L and one control location sample with a concentration of 47 pCi/L.

Preoperational data is not available for comparison.

Naturally occurring Th-228 was detected in two indicator location samples with concentrations ranging from 5.6 pCi/L to 5.8 pCi/L with an average concentration of 5.7 pCi/L, and was detected in one of the control location samples with a concentration of 12 pCi/L. Preoperational data is not available for comparison. (Table C-10, Appendix C)

Iodine-131 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)

All other gamma emitters were less than the LLD.

2. Fish Edible species of fish were collected in the spring and fall of 2018 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 2,666 to 5,034 pCi/kg wet with an average concentration of 3,597 pCi/kg wet, and in all control location samples at concentrations ranging from 2,913 to 4,598 pCi/kg wet with an average concentration of 3,517 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 7,160 to 10,320 pCi/kg dry with an average concentration of 8,323 pCi/kg dry, and in all of the control location samples with concentrations ranging from 10,830 to 14,350 pCi/kg dry with an average concentration of 12,590 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 detected in three of the indicator location samples with concentrations ranging from 1,524 pCi/kg to 2,800 pCi/kg a concentration of 2,003 pCi/kg dry, and one control location sample with a concentration of 1,547 pCi/kg. 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 605 to 1,024 pCi/kg dry with an average concentration of 835 pCi/kg dry, and in both of the control location samples at concentrations ranging from 912 to 1,184 pCi/kg dry with an average concentration of 1,048 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 776 to 965 pCi/kg dry with an average concentration of 863 pCi/kg dry, and in both of the control location samples at concentrations ranging from 956 and 1,429 pCi/kg dry with an average concentration of 1,193 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 2018 LAND USE CENSUS Applied Ecoscience, Inc. conducted a Land Use Census during the 2018 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, 2018 Sept, 2018 Sept, 2018 Sector miles miles miles 1 N 1.3 3.2 >5.0 2 NNE 1.0 2.3 a,b,c,e >5.0 3 NE 0.9 2.7 >5.0 4 ENE 2.1 2.4 a,c,f >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 0.6 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 d 13 W 1.2 3.2 5.0 14 WNW 1.1 1.3 >5.0 15 NW 0.8 2.3 a,c >5.0 16 NNW 0.6 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 2018 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 2018 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, 2016, prepared by Teledyne Brown Engineering, Knoxville TN.

[2] Final Safety Analysis Report

[3] Final Environmental Statement

[4] Susquehanna Steam Electric Station, 2018 Land Use Census. Prepared for Susquehanna Nuclear, LLC, Berwick, PA. December 2018. 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, 2017 to January 01, 2019 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 385 10 1.202E+01 (312/312) 12E1 1.256E+01 (52/52) 1.167E+01 (73/73) 0 (E-3 pCi/m3) (4.600E+00 - 2.300E+01) 4.7 MILES WSW (4.680E+00 - 2.250E+01) (4.490E+00 - 2.400E+01)

GAMMA 30 BE-7 30 N/A 9.717E+01 (24/24) 9B1 1.055E+02 (4/4) 9.673E+01 (6/6) 0 (5.845E+01 - 1.611E+02) 1.3 MILES SSW (6.403E+01 - 1.315E+02) (8.995E+01 - 1.079E+02)

K-40 30 N/A 1.287E+00 (24/24) 9B1 8.983E+00 (4/4) -1.553E+00 (6/6) 0

(-1.192E+01 - 1.145E+01) 1.3 MILES SSW (3.822E+00 - 1.145E+01) (-1.098E+01 - 6.878E+00)

CS-134 30 50 2.923E-01 (24/24) 3S2 4.285E-01 (4/4) -2.613E-01 (6/6) 0

(-1.188E+00 - 1.044E+00) 0.5 MILES NE (-9.589E 1.044E+00) (-7.604E 5.060E-01)

CS-137 30 60 1.249E-01 (24/24) 12E1 2.268E-01 (4/4) -2.010E-01 (6/6) 0

(-6.628E 6.448E-01) 4.7 MILES WSW (-5.574E 5.511E-01) (-5.804E 1.354E-01)

Charcoal GAMMA 385 (E-3 pCi/m3) I-131 385 70 -4.568E-02 (312/312) 3S2 2.686E-01 (52/52) -7.010E-01 (73/73) 0

(-9.475E+00 - 7.800E+00) 0.5 MILES NE (-9.292E+00 - 7.570E+00) (-9.482E+00 - 6.876E+00)

Ambient Radiation OSLD 227 N/A 1.632E+01 (208/208) 9S2 3.267E+01 (4/4) 1.437E+01 (19/19) 0 (mR/std. qtr.) (7.717E+00 - 3.509E+01) 0.2 MILES S (2.634E+01 - 3.509E+01) (1.049E+01 - 1.820E+01)

Milk I-131 60 1 -1.055E-01 (40/40) 10G1 -7.297E-02 (20/20) -7.297E-02 (20/20) 0 (pCi/Liter) (-9.780E 3.590E-01) 14 MILES SSW (-4.510E 1.870E-01) (-4.510E 1.870E-01)

GAMMA 60 K-40 60 N/A 1.268E+03 (40/40) 10G1 1.277E+03 (20/20) 1.277E+03 (20/20) 0 (1.055E+03 - 1.623E+03) 14 MILES SSW (1.055E+03 - 1.458E+03) (1.055E+03 - 1.458E+03)

CS-134 60 15 -1.382E+00 (40/40) 13E3 -1.141E+00 (20/20) -2.522E+00 (20/20) 0

(-1.143E+01 - 4.901E+00) 5.0 MILES W (-9.320E+00 - 3.501E+00) (-8.041E+00 - 3.629E+00)

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, 2017 to January 01, 2019 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 6.255E-01 (40/40) 5E2 9.618E-01 (20/20) 5.447E-01 (20/20) 0 (pCi/Liter) (-4.459E+00 - 9.184E+00) 4.5 MILES E (-3.355E+00 - 5.406E+00) (-3.411E+00 - 5.147E+00)

BA-140 60 60 -7.073E-01 (40/40) 13E3 2.166E+00 (20/20) -9.601E-01 (20/20) 0

(-1.937E+01 - 1.622E+01) 5.0 MILES W (-1.244E+01 - 1.622E+01) (-2.115E+01 - 1.810E+01)

LA-140 60 15 -2.935E-03 (40/40) 5E2 8.134E-01 (20/20) 1.551E-01 (20/20) 0

(-7.808E+00 - 9.135E+00) 4.5 MILES E (-3.851E+00 - 9.135E+00) (-4.260E+00 - 5.553E+00)

TH-228 60 N/A 5.549E-01 (40/40) 5E2 1.256E+00 (20/20) 1.941E-01 (20/20) 0

(-1.083E+01 - 7.394E+00) 4.5 MILES E (-7.198E+00 - 7.053E+00) (-1.092E+01 - 1.658E+01)

Ground Water H-3 50 2000 9.431E+01 (48/48) 1S3 2.178E+02 (4/4) 8.185E+01 (2/2) 0 (pCi/Liter) (-3.630E+01 - 3.540E+02) 0.1 MILES N (1.360E+02 - 3.540E+02) (7.740E+01 - 8.630E+01)

GAMMA 50 K-40 50 N/A 2.720E+00 (48/48) 4S8 2.470E+01 (4/4) -8.606E+00 (2/2) 0

(-8.691E+01 - 6.754E+01) 0.1 MILES ENE (-3.416E+01 - 6.754E+01) (-1.593E+01 - -1.281E+00)

MN-54 50 15 -6.542E-01 (48/48) 7S10 7.614E-01 (4/4) 3.344E-01 (2/2) 0

(-8.122E+00 - 2.792E+00) 0.3 MILES SE (-7.994E 2.497E+00) (-2.339E 9.027E-01)

CO-58 50 15 -5.217E-01 (48/48) 6S10 1.012E+00 (2/2) -5.037E-01 (2/2) 0

(-5.521E+00 - 2.651E+00) 0.4 MILES ESE (9.705E 1.054E+00) (-7.648E -2.425E-01)

FE-59 50 30 3.626E-01 (48/48) 4S9 4.621E+00 (4/4) 9.365E-01 (2/2) 0

(-1.176E+01 - 1.497E+01) 0.3 MILES ENE (-1.817E+00 - 1.497E+01) (-2.840E 2.157E+00)

CO-60 50 15 5.891E-01 (48/48) 4S4 3.852E+00 (2/2) 6.749E-01 (2/2) 0

(-4.156E+00 - 5.657E+00) 0.5 MILES ENE (2.047E+00 - 5.657E+00) (-7.112E 1.357E+00)

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, 2017 to January 01, 2019 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 50 30 -3.005E+00 (48/48) 2S8 1.161E+00 (4/4) -3.115E+00 (2/2) 0 (pCi/Liter) (-2.447E+01 - 7.517E+00) (-2.974E+00 - 7.517E+00) (-4.430E+00 - -1.800E+00)

NB-95 50 15 1.252E+00 (48/48) 2S8 5.645E+00 (4/4) 3.571E+00 (2/2) 0

(-7.108E+00 - 1.300E+01) (2.184E+00 - 1.189E+01) (1.643E 6.978E+00)

ZR-95 50 30 -1.294E-01 (48/48) 4S4 4.429E+00 (2/2) 2.220E+00 (2/2) 0

(-6.888E+00 - 6.467E+00) 0.5 MILES ENE (2.627E+00 - 6.230E+00) (1.022E+00 - 3.417E+00)

I-131 50 15 -2.183E-01 (48/48) 13S7 2.256E+00 (4/4) -5.720E-01 (2/2) 0

(-5.428E+00 - 7.161E+00) 0.2 MILES W (-1.064E+00 - 7.161E+00) (-1.930E+00 - 7.860E-01)

CS-134 50 15 -7.348E-01 (48/48) 2S8 1.597E+00 (4/4) 1.157E+00 (2/2) 0

(-6.565E+00 - 6.949E+00) (-2.212E+00 - 6.949E+00) (5.294E 1.784E+00)

CS-137 50 18 -6.578E-01 (48/48) 7S11 1.960E+00 (4/4) -3.257E+00 (2/2) 0

(-5.735E+00 - 3.740E+00) (1.182E+00 - 3.449E+00) (-6.390E+00 - -1.240E-01)

BA-140 50 60 -1.363E+00 (48/48) 4S4 8.252E+00 (2/2) 4.441E+00 (2/2) 0

(-2.626E+01 - 1.723E+01) 0.5 MILES ENE (1.893E+00 - 1.461E+01) (2.426E+00 - 6.456E+00)

LA-140 50 15 -2.142E-01 (48/48) 4S4 2.816E+00 (2/2) -1.647E+00 (2/2) 0

(-6.066E+00 - 8.363E+00) 0.5 MILES ENE (1.385E+00 - 4.247E+00) (-2.046E+00 - -1.247E+00)

TH-228 50 N/A 4.919E-01 (48/48) 11S2 7.179E+00 (2/2) 3.380E+00 (2/2) 0

(-2.105E+01 - 1.554E+01) 0.4 MILES SW (7.164E+00 - 7.194E+00) (1.975E+00 - 4.784E+00)

Drinking Water GR-B 12 4 1.493E+00 (12/12) 12H2 1.493E+00 (12/12) .000E+00 0 (pCi/Liter) (-2.210E 3.320E+00) 26 MILES WSW (-2.210E 3.320E+00)

H-3 12 2000 6.120E+01 (12/12) 12H2 6.120E+01 (12/12) .000E+00 0

(-1.640E+01 - 1.410E+02) 26 MILES WSW (-1.640E+01 - 1.410E+02)

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, 2017 to January 01, 2019 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 12 (pCi/Liter) K-40 12 N/A 5.744E+00 (12/12) 12H2 5.744E+00 (12/12) .000E+00 0

(-1.705E+01 - 2.533E+01) 26 MILES WSW (-1.705E+01 - 2.533E+01)

MN-54 12 15 -1.352E-01 (12/12) 12H2 -1.352E-01 (12/12) .000E+00 0

(-9.694E 1.394E+00) 26 MILES WSW (-9.694E 1.394E+00)

CO-58 12 15 -3.226E-01 (12/12) 12H2 -3.226E-01 (12/12) .000E+00 0

(-1.386E+00 - 6.350E-01) 26 MILES WSW (-1.386E+00 - 6.350E-01)

FE-59 12 30 1.386E+00 (12/12) 12H2 1.386E+00 (12/12) .000E+00 0

(-1.437E+00 - 3.170E+00) 26 MILES WSW (-1.437E+00 - 3.170E+00)

CO-60 12 15 8.358E-01 (12/12) 12H2 8.358E-01 (12/12) .000E+00 0

(-1.953E 2.044E+00) 26 MILES WSW (-1.953E 2.044E+00)

ZN-65 12 30 -2.156E+00 (12/12) 12H2 -2.156E+00 (12/12) .000E+00 0

(-4.949E+00 - -5.172E-02) 26 MILES WSW (-4.949E+00 - -5.172E-02)

NB-95 12 15 8.353E-01 (12/12) 12H2 8.353E-01 (12/12) .000E+00 0 (1.403E 2.851E+00) 26 MILES WSW (1.403E 2.851E+00)

ZR-95 12 30 3.198E-02 (12/12) 12H2 3.198E-02 (12/12) .000E+00 0

(-1.829E+00 - 9.189E-01) 26 MILES WSW (-1.829E+00 - 9.189E-01)

I-131 12 15 -1.124E+00 (12/12) 12H2 -1.124E+00 (12/12) .000E+00 0

(-7.265E+00 - 5.808E+00) 26 MILES WSW (-7.265E+00 - 5.808E+00)

CS-134 12 15 -5.774E-01 (12/12) 12H2 -5.774E-01 (12/12) .000E+00 0

(-4.875E+00 - 1.981E+00) 26 MILES WSW (-4.875E+00 - 1.981E+00)

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, 2017 to January 01, 2019 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 12 18 -2.346E-01 (12/12) 12H2 -2.346E-01 (12/12) .000E+00 0 (pCi/Liter) (-1.041E+00 - 9.905E-01) 26 MILES WSW (-1.041E+00 - 9.905E-01)

BA-140 12 60 -4.225E-01 (12/12) 12H2 -4.225E-01 (12/12) .000E+00 0

(-8.566E+00 - 7.367E+00) 26 MILES WSW (-8.566E+00 - 7.367E+00)

LA-140 12 15 -1.624E-01 (12/12) 12H2 -1.624E-01 (12/12) .000E+00 0

(-4.702E+00 - 5.896E+00) 26 MILES WSW (-4.702E+00 - 5.896E+00)

Food/Garden Crops GAMMA 49 (pCi/kg wet) BE-7 49 N/A 4.429E+02 (34/34) 11S6 5.252E+02 (15/15) 4.375E+02 (15/15) 0

(-6.537E+01 - 1.038E+03) 0.5 MILES SW (6.367E+01 - 1.038E+03) (2.411E+01 - 8.497E+02)

K-40 49 N/A 4.355E+03 (34/34) 11D1 7.369E+03 (3/3) 3.815E+03 (15/15) 0 (1.688E+03 - 1.672E+04) 3.3 MILES SW (1.688E+03 - 1.672E+04) (2.599E+03 - 4.927E+03)

MN-54 49 N/A 2.293E+00 (34/34) 12F7 3.774E+00 (1/1) -1.877E+00 (15/15) 0

(-8.966E+00 - 1.514E+01) 8.3 MILES WSW (3.774E+00) (-1.674E+01 - 9.911E+00)

CO-58 49 N/A -1.420E+00 (34/34) 11S6 6.612E-01 (15/15) -1.386E+00 (15/15) 0

(-1.554E+01 - 8.786E+00) 0.5 MILES SW (-6.675E+00 - 7.400E+00) (-1.840E+01 - 1.148E+01)

FE-59 49 N/A -2.839E+00 (34/34) 12F7 2.287E+01 (1/1) 4.330E+00 (15/15) 0

(-6.522E+01 - 4.750E+01) 8.3 MILES WSW (2.287E+01) (-2.334E+01 - 4.061E+01)

CO-60 49 N/A 1.964E+00 (34/34) 11D1 4.858E+00 (3/3) 1.462E+00 (15/15) 0

(-1.059E+01 - 1.531E+01) 3.3 MILES SW (-8.475E+00 - 1.166E+01) (-1.052E+01 - 1.865E+01)

ZN-65 49 N/A -1.647E+01 (34/34) 11S6 -1.233E+01 (15/15) -1.435E+01 (15/15) 0

(-3.965E+01 - 1.609E+01) 0.5 MILES SW (-3.880E+01 - 1.609E+01) (-4.234E+01 - 3.317E+01)

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, 2017 to January 01, 2019 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 49 N/A 2.322E+00 (34/34) 11D1 9.372E+00 (3/3) -1.004E+00 (15/15) 0 (pCi/kg wet) (-1.312E+01 - 1.603E+01) 3.3 MILES SW (2.665E+00 - 1.479E+01) (-1.489E+01 - 1.395E+01)

ZR-95 49 N/A 1.227E+00 (34/34) 12F7 1.439E+01 (1/1) 1.571E+00 (15/15) 0

(-1.885E+01 - 1.931E+01) 8.3 MILES WSW (1.439E+01) (-2.573E+01 - 2.038E+01)

I-131 49 60 -5.852E-01 (34/34) 11S6 1.483E+00 (15/15) -2.953E-01 (15/15) 0

(-2.303E+01 - 2.742E+01) 0.5 MILES SW (-1.547E+01 - 2.742E+01) (-2.710E+01 - 2.024E+01)

CS-134 49 60 -5.875E+00 (34/34) 12F7 4.634E+00 (1/1) -2.020E+00 (15/15) 0

(-3.573E+01 - 2.277E+01) 8.3 MILES WSW (4.634E+00) (-1.448E+01 - 3.668E+01)

CS-137 49 80 1.169E+00 (34/34) 12F7 5.471E+00 (1/1) 2.384E+00 (15/15) 0

(-1.067E+01 - 1.465E+01) 8.3 MILES WSW (5.471E+00) (-7.459E+00 - 1.917E+01)

BA-140 49 N/A 4.286E+00 (34/34) 12F7 7.479E+01 (1/1) 7.165E+00 (15/15) 0

(-4.523E+01 - 7.972E+01) 8.3 MILES WSW (7.479E+01) (-6.188E+01 - 6.115E+01)

LA-140 49 N/A -1.729E+00 (34/34) 12F7 8.278E+00 (1/1) -1.598E-01 (15/15) 0

(-2.133E+01 - 1.483E+01) 8.3 MILES WSW (8.278E+00) (-1.913E+01 - 2.445E+01)

AC-228 49 N/A 1.998E+00 (34/34) 11D1 5.580E+01 (3/3) 3.494E+00 (15/15) 0

(-4.865E+01 - 8.463E+01) 3.3 MILES SW (3.785E+01 - 8.463E+01) (-5.636E+01 - 5.234E+01)

TH-228 49 N/A 3.679E+00 (34/34) 11D1 8.529E+00 (3/3) -5.979E+00 (15/15) 0

(-2.757E+01 - 6.547E+01) 3.3 MILES SW (-6.513E+00 - 2.633E+01) (-2.524E+01 - 1.297E+01)

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, 2017 to January 01, 2019 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 46 2000 6.617E+02 (33/33) 2S7 1.501E+03 (13/13) 5.688E+01 (13/13) 0 (pCi/Liter) (-1.900E+01 - 6.170E+03) 0.1 MILES NNE (1.350E+02 - 6.170E+03) (-3.470E+01 - 1.230E+02)

GAMMA 46 K-40 46 N/A 2.840E+00 (33/33) LTAW 5.772E+01 (2/2) -1.063E+01 (13/13) 0

(-1.138E+02 - 1.008E+02) 0.7 MILES NE (1.463E+01 - 1.008E+02) (-1.611E+02 - 4.680E+01)

MN-54 46 15 3.246E-02 (33/33) 2S7 3.862E-01 (13/13) -1.856E-01 (13/13) 0

(-2.044E+00 - 2.661E+00) 0.1 MILES NNE (-8.110E 1.448E+00) (-1.809E+00 - 1.040E+00)

CO-58 46 15 -2.622E-01 (33/33) 7S12 3.404E-01 (2/2) -2.530E-01 (13/13) 0

(-4.348E+00 - 1.155E+00) 0.3 MILES SE (1.534E 5.274E-01) (-1.538E+00 - 7.882E-01)

FE-59 46 30 9.063E-01 (33/33) 4S7 8.290E+00 (2/2) 2.386E-01 (13/13) 0

(-4.165E+00 - 1.210E+01) 0.4 MILES ENE (4.480E+00 - 1.210E+01) (-2.734E+00 - 3.225E+00)

CO-60 46 15 4.710E-01 (33/33) LTAW 1.097E+00 (2/2) 5.243E-01 (13/13) 0

(-2.090E+00 - 1.501E+00) 0.7 MILES NE (8.236E 1.370E+00) (-6.191E 1.461E+00)

ZN-65 46 30 -1.431E+00 (33/33) 5S12 1.344E+00 (2/2) -2.446E+00 (13/13) 0

(-1.032E+01 - 5.775E+00) 0.4 MILES E (-3.087E+00 - 5.775E+00) (-5.173E+00 - -4.381E-02)

NB-95 46 15 3.281E-01 (33/33) 7S12 2.135E+00 (2/2) 5.375E-01 (13/13) 0

(-1.864E+00 - 2.986E+00) 0.3 MILES SE (1.633E+00 - 2.636E+00) (-5.906E 1.886E+00)

ZR-95 46 30 9.105E-03 (33/33) 7S12 4.766E+00 (2/2) 1.316E-01 (13/13) 0

(-4.492E+00 - 8.268E+00) 0.3 MILES SE (1.264E+00 - 8.268E+00) (-1.011E+00 - 1.767E+00)

I-131 46 15 4.466E-01 (33/33) 5S12 1.961E+00 (2/2) 2.001E-01 (13/13) 0

(-5.021E+00 - 7.821E+00) 0.4 MILES E (1.288E+00 - 2.634E+00) (-6.769E+00 - 1.004E+01)

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, 2017 to January 01, 2019 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 46 15 -5.181E-01 (33/33) 5S12 7.386E-01 (2/2) -1.155E+00 (13/13) 0 (pCi/Liter) (-4.965E+00 - 2.457E+00) 0.4 MILES E (3.832E 1.094E+00) (-3.627E+00 - 5.297E-01)

CS-137 46 18 -1.861E-01 (33/33) 5S12 9.282E-01 (2/2) -1.827E-01 (13/13) 0

(-1.949E+00 - 1.427E+00) 0.4 MILES E (4.294E 1.427E+00) (-1.432E+00 - 6.841E-01)

BA-140 46 60 -1.680E-01 (33/33) 7S12 3.341E+00 (2/2) 9.303E-01 (13/13) 0

(-1.405E+01 - 1.648E+01) 0.3 MILES SE (-9.798E+00 - 1.648E+01) (-1.176E+01 - 1.565E+01)

LA-140 46 15 -1.058E-01 (33/33) 5S12 2.133E+00 (2/2) -1.476E+00 (13/13) 0

(-4.917E+00 - 5.430E+00) 0.4 MILES E (-1.164E+00 - 5.430E+00) (-5.809E+00 - 2.790E+00)

TH-228 46 N/A 5.809E-02 (33/33) 6S6 9.781E-01 (13/13) 9.781E-01 (13/13) 0

(-7.898E+00 - 6.555E+00) 0.8 MILES ESE (-3.632E+00 - 1.199E+01) (-3.632E+00 - 1.199E+01)

Fish GAMMA 14 (pCi/kg wet) K-40 14 N/A 3.597E+03 (8/8) LTAW 3.954E+03 (2/2) 3.517E+03 (6/6) 0 (2.666E+03 - 5.034E+03) 0.7 MILES NE (3.911E+03 - 3.996E+03) (2.913E+03 - 4.598E+03)

MN-54 14 130 9.567E+00 (8/8) LTAW 1.030E+01 (2/2) 8.021E+00 (6/6) 0

(-1.285E+01 - 2.918E+01) 0.7 MILES NE (8.435E+00 - 1.216E+01) (-1.171E+01 - 3.363E+01)

CO-58 14 130 -1.800E+01 (8/8) IND -8.228E+00 (6/6) -8.255E+00 (6/6) 0

(-4.791E+01 - 6.103E+00) 0.9-1.4 MILES ESE (-3.649E+01 - 6.103E+00) (-5.256E+01 - 4.438E+01)

FE-59 14 260 -2.162E+01 (8/8) 2H -8.013E+00 (6/6) -8.013E+00 (6/6) 0

(-1.006E+02 - 5.599E+01) 30 MILES NNE (-9.866E+01 - 1.442E+02) (-9.866E+01 - 1.442E+02)

CO-60 14 130 -8.805E+00 (8/8) 2H -9.345E-01 (6/6) -9.345E-01 (6/6) 0

(-4.541E+01 - 2.389E+01) 30 MILES NNE (-2.854E+01 - 4.128E+01) (-2.854E+01 - 4.128E+01)

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, 2017 to January 01, 2019 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 -4.219E+01 (8/8) LTAW -2.473E+01 (2/2) -4.415E+01 (6/6) 0 (pCi/kg wet) (-1.002E+02 - 4.228E+01) 0.7 MILES NE (-8.039E+01 - 3.094E+01) (-6.566E+01 - -9.410E+00)

CS-134 14 130 -2.136E+01 (8/8) LTAW 5.345E-01 (2/2) -3.161E+01 (6/6) 0

(-7.832E+01 - 1.582E+01) 0.7 MILES NE (-6.943E+00 - 8.012E+00) (-6.360E+01 - -6.567E+00)

CS-137 14 150 1.094E+00 (8/8) IND 6.517E+00 (6/6) 3.592E+00 (6/6)

(-3.277E+01 - 3.311E+01) 0.9-1.4 MILES ESE (-6.778E+00 - 3.311E+01) (-1.703E+01 - 2.624E+01) 0 Sediment GAMMA 6 (pCi/kg dry) K-40 6 N/A 8.323E+03 (4/4) 2B 1.259E+04 (2/2) 1.259E+04 (2/2) 0 (7.160E+03 - 1.032E+04) 1.6 MILES NNE (1.083E+04 - 1.435E+04) (1.083E+04 - 1.435E+04)

CS-134 6 150 3.159E+00 (4/4) 7B 4.225E+00 (2/2) -7.880E+00 (2/2) 0

(-1.176E+01 - 2.021E+01) 1.2 MILES SE (-1.176E+01 - 2.021E+01) (-3.191E+01 - 1.615E+01)

CS-137 6 180 2.873E+01 (4/4) 7B 4.546E+01 (2/2) 1.644E+01 (2/2) 0 (1.025E+01 - 5.042E+01) 1.2 MILES SE (4.050E+01 - 5.042E+01) (9.317E+00 - 2.357E+01)

RA-226 6 N/A 1.587E+03 (4/4) 7B 2.243E+03 (2/2) 1.614E+03 (2/2)

(3.371E+02 - 2.800E+03) 1.2 MILES SE (1.686E+03 - 2.800E+03) (1.547E+03 - 1.681E+03) 0 AC-228 6 N/A 8.346E+02 (4/4) 2B 1.048E+03 (2/2) 1.048E+03 (2/2)

(6.048E+02 - 1.024E+03) 1.6 MILES NNE (9.121E+02 - 1.184E+03) (9.121E+02 - 1.184E+03) 0 TH-228 6 N/A 8.634E+02 (4/4) 2B 1.193E+03 (2/2) 1.193E+03 (2/2)

(7.761E+02 - 9.653E+02) 1.6 MILES NNE (9.564E+02 - 1.429E+03) (9.564E+02 - 1.429E+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 available measure results. 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 Requirments (i.e., when Reporting Levels in Technical Requirements are exceeded).

A-10

Intentionally left blank A-11

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 5S9 0.8 mi.E; 41.093292 -76.130472 Surface water 5S12 0.4 mi.E; 41.092540 -76.138704 Surface water 7S12 0.3 mi.SE; 41.088507 -76.143270 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 Surface water 4S7 0.4 mi.ENE; 41.094418 -76.138236 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 2S2 0.9 mi.NNE; 41.102243 -76.136702 Ground water 4S4 0.5 mi.ENE; 41.095471 -76.138798 Ground water 6S10 0.4 mi.ESE; 41.090511 -76.137802 Ground water 6S11A 0.4 mi.ESE; 41.083448 -76.133412 Ground water 6S11B 0.4 mi.ESE; 41.083448 -76.133411 Ground water 6S12 0.8 mi.ESE; 41.083411 -76.116935 Ground water 7S11 0.3 mi.SE; 41.083527 -76.133513 Ground water 11S2 0.4 mi.SW; 41.088816 -76.152793 Ground water 1S3 0.1 mi N; 41.093640 -76.146076 Ground water

- Control Location B-3

TABLE B-1 (contd)

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

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 3S3 0.9 mi.NE; 41.101856 -76.133090 Broadleaf 5S10 0.7 mi.E; 41.0.93899 -76.132814 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 Site 4 0.1 mi.NW; 41.093321 -76.147316 Precipitation FROM ONE to FIVE MILES FROM THE SSES 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 8C1 2.9 mi.SSE; 41.054518 -76.129027 Broadleaf 10B5 1.3 mi.SSW; 41.075404 -76.157422 Broadleaf 13E3 5.0 mi.W; 41.100259 -76.241102 Milk 11D1 3.3 mi.SW; 41.055212 -76.186797 Food Products 11D2 3.5 mi.SW; 41.054827 -76.205081 Food products

- Control Location B-4

TABLE B-1 (contd)

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

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 6G1 ** 13.5 mi.ESE; 41.018989 -75.906515 Air 8G1 ** 12 mi.SSE; 40.928886 -76.055092 Air, Broadleaf 10G1 ** 14 mi.SSW; 40.934847 -76.284449 Milk 12F3 ** 5.2 mi.WSW; 41.054491 -76.232176 Ground water 12F7 8.3 mi.WSW; 41.036689 -76.286776 Food Products 11F2 5.5 mi.SW; 41.045741 -76.242128 Food products 15G1 ** 11.4 mi.NW; 41.188578 -76.324598 Broadleaf OSLD LOCATIONS LESS THAN ONE MILE FROM THE SSES 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

- Control Location 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.

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 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

Special Interest Area (other than controls)

B-6

TABLE B-1 (contd)

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

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 GREATER THAN FIVE MILES FROM THE SSES 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 (LTAW, 4S7, Applied Ecoscience, Appendix 3, 4, 5, 6, & 7 TBE-2010 Tritium and Carbon-14 Analysis by Liquid Drinking Water 5S12 and 7S12 Scintillation.

Quarterly)

Surface & Gamma Monthly (LTAW, 4S7, Applied Ecoscience, Appendix 3, 4, 5, 6, & 7 TBE-2007 Gamma Emitting Radioisotope Analysis.

Drinking Water 5S12 and 7S12 Quarterly)

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

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

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B-11

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

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

Intentionally left blank B-16

APPENDIX C DATA TABLES C-1

TABLE C-1 GROSS BETA ANALYSES OF AIR PARTICULATE FILTERS SUSQUEHANNA STEAM ELECTRIC STATION, 2018 Results in units of E-03 pCi/cu.m. +/- 2 sigma COLLECTION PERIOD 3S2 *6G1 8G1 12E1 12S1 13S6 01/03/18 - 01/10/18 11 +/- 2 12 +/- 2 12 +/- 2 13 +/- 2 13 +/- 2 11 +/- 2 01/10/18 - 01/16/18 13 +/- 3 13 +/- 3 13 +/- 3 11 +/- 3 12 +/- 3 13 +/- 3 01/16/18 - 01/24/18 18 +/- 2 15 +/- 2 15 +/- 2 16 +/- 2 16 +/- 2 18 +/- 2 01/24/18 - 01/31/18 9 +/- 2 11 +/- 2 9 +/- 2 12 +/- 2 13 +/- 2 9 +/- 2 01/31/18 - 02/06/18 11 +/- 2 12 +/- 2 11 +/- 2 10 +/- 2 12 +/- 2 11 +/- 2 02/06/18 - 02/14/18 12 +/- 2 11 +/- 2 11 +/- 2 14 +/- 2 13 +/- 2 12 +/- 2 02/14/18 - 02/21/18 12 +/- 2 12 +/- 2 11 +/- 2 15 +/- 2 14 +/- 2 16 +/- 2 02/21/18 - 02/28/18 8 +/- 2 9 +/- 2 10 +/- 2 8 +/- 2 9 +/- 2 7 +/- 2 02/28/18 - 03/06/18 11 +/- 2 13 +/- 2 13 +/- 2 14 +/- 2 14 +/- 3 13 +/- 2 03/06/18 - 03/14/18 7 +/- 2 4 +/- 1 5 +/- 1 5 +/- 1 6 +/- 2 6 +/- 2 03/14/18 - 03/20/18 14 +/- 3 14 +/- 2 14 +/- 3 14 +/- 3 14 +/- 3 15 +/- 3 03/20/18 - 03/28/18 9 +/- 2 9 +/- 2 10 +/- 2 9 +/- 2 9 +/- 2 11 +/- 2 03/28/18 - 04/04/18 9 +/- 2 8 +/- 2 10 +/- 2 11 +/- 2 9 +/- 2 10 +/- 2 04/04/18 - 04/11/18 11 +/- 2 11 +/- 2 11 +/- 2 12 +/- 2 11 +/- 2 12 +/- 2 04/11/18 - 04/18/18 9 +/- 2 10 +/- 2 10 +/- 2 12 +/- 2 10 +/- 2 10 +/- 2 04/18/18 - 04/25/18 12 +/- 2 10 +/- 2 14 +/- 2 13 +/- 2 12 +/- 2 9 +/- 2 04/25/18 - 05/02/18 12 +/- 2 14 +/- 2 14 +/- 2 12 +/- 2 12 +/- 3 12 +/- 2 05/02/18 - 05/09/18 14 +/- 2 13 +/- 2 13 +/- 2 13 +/- 2 15 +/- 2 13 +/- 2 05/09/18 - 05/16/18 12 +/- 2 11 +/- 2 15 +/- 2 15 +/- 2 13 +/- 2 13 +/- 2 05/16/18 - 05/23/18 7 +/- 2 7 +/- 2 8 +/- 2 7 +/- 2 10 +/- 2 7 +/- 2 05/23/18 - 05/30/18 14 +/- 2 17 +/- 2 14 +/- 2 14 +/- 2 15 +/- 2 13 +/- 2 05/30/18 - 06/06/18 8 +/- 2 7 +/- 2 6 +/- 2 7 +/- 2 6 +/- 2 06/06/18 - 06/13/18 11 +/- 2 15 +/- 2 12 +/- 2 12 +/- 2 13 +/- 2 06/13/18 - 06/20/18 11 +/- 2 9 +/- 2 10 +/- 2 11 +/- 2 11 +/- 2 06/20/18 - 06/27/18 10 +/- 2 11 +/- 2 10 +/- 2 10 +/- 2 10 +/- 2 06/27/18 - 07/03/18 17 +/- 3 14 +/- 2 16 +/- 3 16 +/- 3 16 +/- 3 07/03/18 - 07/11/18 16 +/- 2 15 +/- 2 15 +/- 2 14 +/- 2 16 +/- 2 07/11/18 - 07/18/18 14 +/- 2 15 +/- 2 17 +/- 2 15 +/- 2 17 +/- 2 07/18/18 - 07/25/18 7 +/- 2 7 +/- 2 9 +/- 2 6 +/- 2 8 +/- 2 07/25/18 - 08/01/18 13 +/- 2 11 +/- 2 11 +/- 2 11 +/- 2 15 +/- 2 08/01/18 - 08/08/18 18 +/- 2 23 +/- 3 22 +/- 3 20 +/- 2 18 +/- 2 08/08/18 - 08/15/18 14 +/- 2 11 +/- 2 14 +/- 2 13 +/- 2 12 +/- 2 08/15/18 - 08/22/18 13 +/- 2 14 +/- 2 14 +/- 2 14 +/- 2 13 +/- 2 08/22/18 - 08/29/18 22 +/- 3 24 +/- 3 23 +/- 3 22 +/- 3 22 +/- 3 08/29/18 - 09/05/18 11 +/- 2 11 +/- 2 12 +/- 2 10 +/- 2 11 +/- 2 09/05/18 - 09/12/18 9 +/- 2 10 +/- 2 11 +/- 2 12 +/- 2 12 +/- 2 09/12/18 - 09/19/18 8 +/- 2 7 +/- 2 9 +/- 2 7 +/- 2 9 +/- 2 09/19/18 - 09/26/18 8 +/- 2 9 +/- 2 11 +/- 2 8 +/- 2 11 +/- 2 09/26/18 - 10/03/18 12 +/- 2 15 +/- 2 17 +/- 2 13 +/- 2 14 +/- 2 10/03/18 - 10/10/18 16 +/- 2 13 +/- 2 14 +/- 2 12 +/- 2 15 +/- 2 10/10/18 - 10/17/18 9 +/- 2 11 +/- 2 10 +/- 2 9 +/- 2 10 +/- 2 10/17/18 - 10/24/18 9 +/- 2 12 +/- 2 11 +/- 2 8 +/- 2 11 +/- 2 10/24/18 - 10/31/18 6 +/- 2 7 +/- 2 9 +/- 2 8 +/- 2 8 +/- 2 10/31/18 - 11/07/18 12 +/- 2 10 +/- 2 15 +/- 2 12 +/- 2 11 +/- 2 11/07/18 - 11/14/18 12 +/- 2 10 +/- 2 12 +/- 2 11 +/- 2 11 +/- 2 11/14/18 - 11/20/18 11 +/- 2 13 +/- 2 13 +/- 2 12 +/- 2 11 +/- 2 11/20/18 - 11/28/18 13 +/- 2 12 +/- 2 14 +/- 2 11 +/- 2 10 +/- 2 11/28/18 - 12/05/18 9 +/- 2 10 +/- 2 9 +/- 2 9 +/- 2 9 +/- 2 12/05/18 - 12/12/18 15 +/- 2 13 +/- 2 18 +/- 2 17 +/- 2 15 +/- 2 12/12/18 - 12/19/18 16 +/- 2 14 +/- 2 19 +/- 3 16 +/- 2 18 +/- 2 12/19/18 - 12/26/18 11 +/- 2 11 +/- 2 12 +/- 2 11 +/- 2 12 +/- 2 12/26/18 - 01/02/19 11 +/- 2 11 +/- 2 12 +/- 2 11 +/- 2 12 +/- 2 AVERAGE 12 +/- 6 11 +/- 6 12 +/- 7 13 +/- 7 12 +/- 6 12 +/- 6

Station 6G1 is discontinued as of 5/30/18.

C-2

TABLE C-1 GROSS BETA ANALYSES OF AIR PARTICULATE FILTERS SUSQUEHANNA STEAM ELECTRIC STATION, 2018 Results in units of E-03 pCi/cu.m. +/- 2 sigma COLLECTION PERIOD 9B1 10S3 01/03/18 - 01/10/18 13 +/- 2 13 +/- 2 01/10/18 - 01/16/18 13 +/- 3 12 +/- 2 01/16/18 - 01/24/18 20 +/- 2 16 +/- 2 01/24/18 - 01/31/18 10 +/- 2 11 +/- 2 01/31/18 - 02/06/18 10 +/- 2 10 +/- 2 02/06/18 - 02/14/18 13 +/- 2 12 +/- 2 02/14/18 - 02/21/18 12 +/- 2 13 +/- 2 02/21/18 - 02/28/18 9 +/- 2 8 +/- 2 02/28/18 - 03/06/18 14 +/- 2 14 +/- 2 03/06/18 - 03/14/18 5 +/- 1 6 +/- 2 03/14/18 - 03/20/18 14 +/- 3 16 +/- 3 03/20/18 - 03/28/18 13 +/- 2 9 +/- 2 03/28/18 - 04/04/18 8 +/- 2 10 +/- 2 04/04/18 - 04/11/18 7 +/- 2 12 +/- 2 04/11/18 - 04/18/18 10 +/- 2 10 +/- 2 04/18/18 - 04/25/18 13 +/- 2 11 +/- 2 04/25/18 - 05/02/18 11 +/- 2 11 +/- 2 05/02/18 - 05/09/18 14 +/- 2 15 +/- 2 05/09/18 - 05/16/18 11 +/- 2 13 +/- 2 05/16/18 - 05/23/18 7 +/- 2 7 +/- 2 05/23/18 - 05/30/18 17 +/- 2 15 +/- 2 05/30/18 - 06/06/18 7 +/- 2 8 +/- 2 06/06/18 - 06/13/18 12 +/- 2 14 +/- 2 06/13/18 - 06/20/18 11 +/- 2 9 +/- 2 06/20/18 - 06/27/18 11 +/- 2 11 +/- 2 06/27/18 - 07/03/18 17 +/- 3 15 +/- 2 07/03/18 - 07/11/18 13 +/- 2 15 +/- 2 07/11/18 - 07/18/18 15 +/- 2 15 +/- 2 07/18/18 - 07/25/18 7 +/- 2 9 +/- 2 07/25/18 - 08/01/18 13 +/- 2 11 +/- 2 08/01/18 - 08/08/18 21 +/- 3 19 +/- 2 08/08/18 - 08/15/18 11 +/- 2 12 +/- 2 08/15/18 - 08/22/18 15 +/- 2 12 +/- 2 08/22/18 - 08/29/18 23 +/- 3 21 +/- 3 08/29/18 - 09/05/18 12 +/- 2 11 +/- 2 09/05/18 - 09/12/18 10 +/- 2 13 +/- 2 09/12/18 - 09/19/18 7 +/- 2 8 +/- 2 09/19/18 - 09/26/18 9 +/- 2 10 +/- 2 09/26/18 - 10/03/18 13 +/- 2 16 +/- 2 10/03/18 - 10/10/18 13 +/- 2 14 +/- 2 10/10/18 - 10/17/18 9 +/- 2 10 +/- 2 10/17/18 - 10/24/18 9 +/- 2 8 +/- 2 10/24/18 - 10/31/18 8 +/- 2 9 +/- 2 10/31/18 - 11/07/18 12 +/- 2 12 +/- 2 11/07/18 - 11/14/18 10 +/- 2 13 +/- 2 11/14/18 - 11/20/18 11 +/- 2 11 +/- 2 11/20/18 - 11/28/18 12 +/- 2 13 +/- 2 11/28/18 - 12/05/18 9 +/- 2 10 +/- 2 12/05/18 - 12/12/18 18 +/- 2 18 +/- 2 12/12/18 - 12/19/18 15 +/- 2 15 +/- 2 12/19/18 - 12/26/18 12 +/- 2 12 +/- 2 12/26/18 - 01/02/19 12 +/- 2 11 +/- 2 AVERAGE 12 +/- 7 12 +/- 6 C-3

TABLE C-2 GAMMA SPECTROSCOPIC ANALYSES OF COMPOSITED AIR PARTICULATE FILTERS SUSQUEHANNA STEAM ELECTRIC STATION, 2018 Results in units of E-03 pCi/cu.m. +/- 2 sigma COLLECTION SITE PERIOD Be-7 K-40 Cs-134 Cs-137

6G1 01/03/18 - 04/04/18 108 +/- 23 < 19 < 1 < 1 04/04/18 - 05/30/18 92 +/- 39 < 25 < 1 < 1 AVERAGE 100 +/- 22 - - -

8G1 01/03/18 - 04/04/18 94 +/- 17 < 13 < 1 < 1 04/04/18 - 07/03/18 90 +/- 23 < 24 < 1 < 1 07/03/18 - 10/03/18 106 +/- 24 < 16 < 2 < 1 10/03/18 - 01/02/19 90 +/- 17 < 18 < 1 < 1 AVERAGE 95 +/- 15 - - -

3S2 01/03/18 - 04/04/18 73 +/- 16 < 14 < 1 < 1 04/04/18 - 07/03/18 114 +/- 26 < 25 < 2 < 2 07/03/18 - 10/03/18 81 +/- 20 < 12 < 1 < 1 10/03/18 - 01/02/19 70 +/- 14 < 18 < 1 < 1 AVERAGE 85 +/- 41 - - -

12E1 01/03/18 - 04/04/18 83 +/- 17 < 15 < 1 < 1 04/04/18 - 07/03/18 127 +/- 24 < 20 < 1 < 1 07/03/18 - 10/03/18 107 +/- 23 < 20 < 1 < 1 10/03/18 - 01/02/19 75 +/- 16 < 22 < 1 < 1 AVERAGE 98 +/- 48 - - -

12S1 01/03/18 - 04/04/18 80 +/- 19 < 17 < 1 < 1 04/04/18 - 07/03/18 123 +/- 21 < 21 < 1 < 1 07/03/18 - 10/03/18 108 +/- 29 < 30 < 2 < 2 10/03/18 - 01/02/19 58 +/- 13 < 18 < 1 < 1 AVERAGE 92 +/- 57 - - -

13S6 01/03/18 - 04/04/18 89 +/- 22 < 20 < 1 < 1 04/04/18 - 07/03/18 161 +/- 29 < 23 < 1 < 1 07/03/18 - 10/03/18 89 +/- 21 < 19 < 1 < 1 10/03/18 - 01/02/19 63 +/- 18 < 15 < 1 < 1 AVERAGE 101 +/- 84 - - -

10S3 01/03/18 - 04/04/18 86 +/- 30 < 22 < 2 < 1 04/04/18 - 07/03/18 139 +/- 22 < 19 < 1 < 1 07/03/18 - 10/03/18 108 +/- 26 < 23 < 2 < 1 10/03/18 - 01/02/19 76 +/- 16 < 11 < 1 < 1 AVERAGE 102 +/- 56 - - -

9B1 01/03/18 - 04/04/18 114 +/- 24 < 34 < 1 < 2 04/04/18 - 07/03/18 132 +/- 24 < 23 < 1 < 1 07/03/18 - 10/03/18 113 +/- 22 < 28 < 2 < 1 10/03/18 - 01/02/19 64 +/- 17 < 16 < 1 < 1 AVERAGE 105 +/- 58 - - -

Station was discontinued as of 05/30/18.

C-4

TABLE C-3 IODINE-131 ANALYSES OF AIR IODINE SAMPLES SUSQUEHANNA STEAM ELECTRIC STATION, 2018 Results in units of E-03 pCi/cu.m. +/- 2 sigma COLLECTION PERIOD 3S2 *6G1 8G1 12E1 12S1 13S6 01/03/18 - 01/10/18 < 10 < 6 < 6 < 7 < 11 < 11 01/10/18 - 01/16/18 < 13 < 7 < 7 < 8 < 13 < 13 01/16/18 - 01/24/18 < 12 < 6 < 8 < 8 < 12 < 11 01/24/18 - 01/31/18 < 18 < 14 < 14 < 15 < 19 < 18 01/31/18 - 02/06/18 < 18 < 10 < 10 < 11 < 19 < 18 02/06/18 - 02/14/18 < 9 < 6 < 7 < 7 < 9 < 9 02/14/18 - 02/21/18 < 18 < 8 < 10 < 10 < 18 < 17 02/21/18 - 02/28/18 < 11 < 8 < 8 < 7 < 12 < 11 02/28/18 - 03/06/18 < 11 < 7 < 7 < 7 < 12 < 10 03/06/18 - 03/14/18 < 16 < 10 < 10 < 9 < 17 < 16 03/14/18 - 03/20/18 < 14 < 9 < 9 < 9 < 14 < 14 03/20/18 - 03/28/18 < 18 < 11 < 12 < 11 < 18 < 17 03/28/18 - 04/04/18 < 5 < 7 < 8 < 8 < 13 < 13 04/04/18 - 04/11/18 < 19 < 10 < 10 < 10 < 19 < 19 04/11/18 - 04/18/18 < 20 < 8 < 10 < 10 < 20 < 20 04/18/18 - 04/25/18 < 17 < 18 < 18 < 15 < 17 < 17 04/25/18 - 05/02/18 < 12 < 17 < 17 < 7 < 15 < 12 05/02/18 - 05/09/18 < 5 < 16 < 16 < 8 < 12 < 12 05/09/18 - 05/16/18 < 8 < 12 < 12 < 12 < 8 < 7 05/16/18 - 05/23/18 < 19 < 19 < 19 < 19 < 19 < 18 05/23/18 - 05/30/18 < 6 < 10 < 10 < 10 < 6 < 6 05/30/18 - 06/06/18 < 9 < 10 < 11 < 9 < 8 06/06/18 - 06/13/18 < 5 < 6 < 6 < 5 < 5 06/13/18 - 06/20/18 < 9 < 6 < 5 < 9 < 8 06/20/18 - 06/27/18 < 6 < 8 < 3 < 8 < 5 06/27/18 - 07/03/18 < 10 < 6 < 7 < 11 < 10 07/03/18 - 07/11/18 < 5 < 8 < 8 < 5 < 5 07/11/18 - 07/18/18 < 15 < 20 < 20 < 14 < 15 07/18/18 - 07/25/18 < 7 < 16 < 17 < 7 < 7 07/25/18 - 08/01/18 < 20 < 16 < 16 < 8 < 20 08/01/18 - 08/08/18 < 15 < 11 < 11 < 19 < 19 08/08/18 - 08/15/18 < 15 < 11 < 11 < 16 < 16 08/15/18 - 08/22/18 < 5 < 9 < 8 < 6 < 6 08/22/18 - 08/29/18 < 15 < 9 < 9 < 15 < 16 08/29/18 - 09/05/18 < 4 < 10 < 10 < 10 < 10 09/05/18 - 09/12/18 < 5 < 8 < 3 < 6 < 6 09/12/18 - 09/19/18 < 5 < 8 < 8 < 5 < 5 09/19/18 - 09/26/18 < 5 < 8 < 8 < 4 < 5 09/26/18 - 10/03/18 < 15 < 16 < 16 < 16 < 16 10/03/18 - 10/10/18 < 16 < 20 < 19 < 17 < 17 10/10/18 - 10/17/18 < 15 < 11 < 11 < 18 < 17 10/17/18 - 10/24/18 < 12 < 6 < 6 < 12 < 12 10/24/18 - 10/31/18 < 6 < 9 < 9 < 6 < 6 10/31/18 - 11/07/18 < 18 < 17 < 17 < 18 < 18 11/07/18 - 11/14/18 < 10 < 18 < 16 < 11 < 10 11/14/18 - 11/20/18 < 17 < 19 < 18 < 17 < 17 11/20/18 - 11/28/18 < 17 < 15 < 15 < 17 < 16 11/28/18 - 12/05/18 < 19 < 16 < 17 < 18 < 19 12/05/18 - 12/12/18 < 6 < 9 < 9 < 6 < 7 12/12/18 - 12/19/18 < 7 < 4 < 10 < 7 < 7 12/19/18 - 12/26/18 < 10 < 5 < 6 < 4 < 10 12/26/18 - 01/02/19 < 5 < 5 < 5 < 5 < 5 AVERAGE - - - - - -

Station 6G1 is discontinued as of 5/30/18.

C-5

TABLE C-3 IODINE-131 ANALYSES OF AIR IODINE SAMPLES SUSQUEHANNA STEAM ELECTRIC STATION, 2018 Results in units of E-03 pCi/cu.m. +/- 2 sigma COLLECTION PERIOD 9B1 10S3 01/03/18 - 01/10/18 < 7 < 10 01/10/18 - 01/16/18 < 8 < 12 01/16/18 - 01/24/18 < 8 < 11 01/24/18 - 01/31/18 < 14 < 17 01/31/18 - 02/06/18 < 10 < 7 02/06/18 - 02/14/18 < 5 < 8 02/14/18 - 02/21/18 < 10 < 17 02/21/18 - 02/28/18 < 8 < 11 02/28/18 - 03/06/18 < 7 < 10 03/06/18 - 03/14/18 < 9 < 15 03/14/18 - 03/20/18 < 7 < 13 03/20/18 - 03/28/18 < 11 < 7 03/28/18 - 04/04/18 < 6 < 12 04/04/18 - 04/11/18 < 8 < 18 04/11/18 - 04/18/18 < 10 < 19 04/18/18 - 04/25/18 < 18 < 16 04/25/18 - 05/02/18 < 17 < 9 05/02/18 - 05/09/18 < 14 < 12 05/09/18 - 05/16/18 < 11 < 8 05/16/18 - 05/23/18 < 17 < 20 05/23/18 - 05/30/18 < 4 < 6 05/30/18 - 06/06/18 < 4 < 9 06/06/18 - 06/13/18 < 4 < 5 06/13/18 - 06/20/18 < 5 < 8 06/20/18 - 06/27/18 < 8 < 5 06/27/18 - 07/03/18 < 5 < 10 07/03/18 - 07/11/18 < 8 < 6 07/11/18 - 07/18/18 < 8 < 15 07/18/18 - 07/25/18 < 16 < 10 07/25/18 - 08/01/18 < 15 < 16 08/01/18 - 08/08/18 < 11 < 19 08/08/18 - 08/15/18 < 10 < 15 08/15/18 - 08/22/18 < 9 < 5 08/22/18 - 08/29/18 < 9 < 4 08/29/18 - 09/05/18 < 10 < 10 09/05/18 - 09/12/18 < 8 < 5 09/12/18 - 09/19/18 < 8 < 5 09/19/18 - 09/26/18 < 8 < 5 09/26/18 - 10/03/18 < 16 < 15 10/03/18 - 10/10/18 < 19 < 16 10/10/18 - 10/17/18 < 11 < 11 10/17/18 - 10/24/18 < 6 < 5 10/24/18 - 10/31/18 < 9 < 6 10/31/18 - 11/07/18 < 17 < 16 11/07/18 - 11/14/18 < 7 < 10 11/14/18 - 11/20/18 < 18 < 19 11/20/18 - 11/28/18 < 15 < 16 11/28/18 - 12/05/18 < 17 < 19 12/05/18 - 12/12/18 < 9 < 6 12/12/18 - 12/19/18 < 10 < 7 12/19/18 - 12/26/18 < 6 < 10 12/26/18 - 01/02/19 < 5 < 5 AVERAGE - -

C-6

TABLE C-4 ENVIRONMENTAL OPTICALLY STIMULATED LUMINESCENCE DOSIMETRY RESULTS SUSQUEHANNA STEAM ELECTRIC STATION, 2018 Results (1) are in mR/std. qtr (2) +/- 2 sigma (3)

First Quarter Second Quarter Third Quarter Fourth Quarter 1/10/2018 to 3/22/2018 3/22/2018 to 7/5/2018 7/5/2018 to 10/9/2018 10/9/2018 to 1/11/2019 LOCATION ONSITE 1S2 20.9 +/- 1.5 15.4 +/- 0.1 23.6 +/- 3.9 22.0 +/- 0.8 2S2 14.5 +/- 0.6 12.8 +/- 1.8 14.6 +/- 1.1 14.6 +/- 0.1 2S3 17.4 +/- 0.6 14.9 +/- 0.7 19.4 +/- 0.4 20.3 +/- 2.6 3S2 13.0 +/- 0.3 12.8 +/- 1.8 15.2 +/- 1.1 14.6 +/- 1.4 3S3 11.6 +/- 0.5 10.1 +/- 0.1 13.6 +/- 0.3 14.3 +/- 0.6 4S3 16.9 +/- 1.9 16.7 +/- 0.0 20.2 +/- 1.0 20.3 +/- 1.5 4S6 13.9 +/- 0.2 12.7 +/- 0.6 13.7 +/- 0.0 15.0 +/- 0.0 5S4 10.7 +/- 0.6 10.7 +/- 0.6 11.5 +/- 0.3 13.3 +/- 1.5 5S7 14.1 +/- 1.8 13.7 +/- 0.8 16.3 +/- 0.1 18.0 +/- 0.4 6S4 24.2 +/- 4.1 19.3 +/- 1.5 22.8 +/- 2.6 23.7 +/- 1.8 6S9 20.6 +/- 0.5 16.7 +/- 0.7 22.9 +/- 1.9 21.9 +/- 0.9 7S6 18.8 +/- 2.8 18.2 +/- 2.4 20.2 +/- 1.5 21.6 +/- 0.8 7S7 12.2 +/- 0.0 11.3 +/- 0.2 12.5 +/- 0.7 13.2 +/- 0.3 8S2 19.0 +/- 1.6 16.5 +/- 0.2 22.4 +/- 0.6 22.0 +/- 1.1 9S2 35.1 +/- 0.4 26.3 +/- 1.7 34.8 +/- 0.3 34.4 +/- 5.7 10S1 13.3 +/- 1.7 11.4 +/- 0.8 13.9 +/- 0.8 14.9 +/- 0.1 10S2 31.7 +/- 1.5 24.8 +/- 1.5 29.4 +/- 0.9 29.6 +/- 0.8 11S7 13.4 +/- 0.5 12.2 +/- 0.6 13.8 +/- 1.1 14.4 +/- 1.9 12S1 15.8 +/- 1.6 13.2 +/- 0.6 16.9 +/- 0.8 16.6 +/- 0.3 12S3 17.0 +/- 3.0 17.8 +/- 0.2 17.9 +/- 0.1 17.7 +/- 3.0 12S7 13.0 +/- 0.5 12.4 +/- 0.1 13.9 +/- 1.3 14.8 +/- 2.4 13S2 24.9 +/- 2.3 21.2 +/- 2.1 26.5 +/- 4.0 22.3 +/- 3.4 13S5 24.0 +/- 1.5 19.2 +/- 0.6 30.6 +/- 3.5 25.4 +/- 3.6 13S6 18.1 +/- 0.1 16.0 +/- 0.8 20.2 +/- 0.8 21.0 +/- 0.8 14S5 17.3 +/- 0.3 17.1 +/- 0.9 19.6 +/- 0.2 20.0 +/- 1.9 15S5 16.3 +/- 1.3 13.7 +/- 0.1 17.8 +/- 3.4 16.6 +/- 2.3 16S1 19.0 +/- 0.3 14.9 +/- 1.3 20.2 +/- 1.1 19.4 +/- 0.4 16S2 18.4 +/- 0.6 15.7 +/- 1.4 19.9 +/- 1.1 20.9 +/- 1.6 See the comments at the end of this table.

C-7

TABLE C-4 ENVIRONMENTAL OPTICALLY STIMULATED LUMINESCENCE DOSIMETRY RESULTS SUSQUEHANNA STEAM ELECTRIC STATION, 2018 Results (1) are in mR/std. qtr (2) +/- 2 sigma (3)

First Quarter Second Quarter Third Quarter Fourth Quarter 1/10/2018 to 3/22/2018 3/22/2018 to 7/5/2018 7/5/2018 to 10/9/2018 10/9/2018 to 1/11/2019 LOCATION 0-1 MILE OFFSITE 6A4 16.8 +/- 1.5 13.5 +/- 1.5 16.1 +/- 1.0 19.3 +/- 0.2 8A3 11.0 +/- 0.3 10.9 +/- 0.0 13.0 +/- 0.7 15.5 +/- 0.5 15A3 11.2 +/- 0.4 11.8 +/- 0.5 13.8 +/- 0.3 13.4 +/- 0.2 16A2 10.9 +/- 1.0 9.8 +/- 0.4 13.2 +/- 1.0 13.0 +/- 0.8 1-2 MILES OFFSITE 8B2 11.3 +/- 2.0 11.7 +/- 1.1 14.6 +/- 2.4 13.7 +/- 1.2 9B1 16.8 +/- 0.8 15.6 +/- 0.2 18.3 +/- 0.3 17.2 +/- 0.1 10B3 12.0 +/- 0.7 10.8 +/- 0.6 13.9 +/- 0.1 13.0 +/- 1.2 3-4 MILES OFFSITE 1D5 14.0 +/- 0.2 14.1 +/- 1.0 16.2 +/- 0.8 16.0 +/- 0.5 8D3 12.2 +/- 1.3 13.0 +/- 0.4 15.4 +/- 1.0 13.3 +/- 0.1 9D4 12.5 +/- 0.9 13.3 +/- 1.0 15.7 +/- 0.7 15.6 +/- 0.8 10D1 13.6 +/- 0.0 13.7 +/- 2.2 15.8 +/- 0.1 14.2 +/- 1.4 12D2 16.8 +/- 0.0 15.7 +/- 0.4 21.3 +/- 1.8 17.8 +/- 0.5 14D1 12.4 +/- 0.1 14.3 +/- 0.2 16.0 +/- 0.3 16.8 +/- 0.2 4-5 MILES OFFSITE 3E1 9.8 +/- 1.1 9.9 +/- 0.2 11.8 +/- 0.9 11.4 +/- 1.4 4E2 13.2 +/- 0.3 14.4 +/- 0.7 14.3 +/- 0.8 14.8 +/- 0.5 5E2 12.1 +/- 0.1 12.4 +/- 1.0 16.5 +/- 2.1 14.6 +/- 2.1 6E1 14.3 +/- 0.9 15.0 +/- 0.3 16.6 +/- 0.7 17.0 +/- 1.1 7E1 13.5 +/- 0.2 13.5 +/- 0.3 16.5 +/- 1.0 15.7 +/- 0.6 11E1 9.7 +/- 0.6 9.6 +/- 0.0 12.8 +/- 1.7 7.7 +/- 4.0 12E1 11.9 +/- 1.0 11.0 +/- 1.1 12.9 +/- 1.3 14.9 +/- 1.6 13E4 17.2 +/- 0.2 15.3 +/- 0.4 17.9 +/- 0.2 18.1 +/- 0.7 See the comments at the end of this table.

C-8

TABLE C-4 ENVIRONMENTAL OPTICALLY STIMULATED LUMINESCENCE DOSIMETRY RESULTS SUSQUEHANNA STEAM ELECTRIC STATION, 2018 Results (1) are in mR/std. qtr (2) +/- 2 sigma (3)

First Quarter Second Quarter Third Quarter Fourth Quarter 1/10/2018 to 3/22/2018 3/22/2018 to 7/5/2018 7/5/2018 to 10/9/2018 10/9/2018 to 1/11/2019 LOCATION 5-10 MILES OFFSITE 2F1 14.1 +/- 0.7 12.2 +/- 0.3 14.4 +/- 0.3 14.7 +/- 0.3 15F1 14.5 +/- 0.8 14.5 +/- 0.1 16.7 +/- 1.6 17.4 +/- 1.9 16F1 17.1 +/- 2.0 14.3 +/- 0.8 17.6 +/- 0.0 18.6 +/- 0.7 10-20 MILES OFFSITE 3G4 15.2 +/- 0.4 14.0 +/- 0.7 16.3 +/- 0.2 16.4 +/- 0.4 4G1 15.7 +/- 1.5 14.7 +/- 0.6 18.2 +/- 1.7 17.5 +/- 0.1 7G1 12.9 +/- 1.2 12.1 +/- 0.3 15.8 +/- 0.3 15.2 +/- 0.4 12G1 11.4 +/- 0.3 10.5 +/- 0.5 14.2 +/- 0.1 13.3 +/- 0.6 12G4 12.7 +/- 0.1 11.4 +/- 0.7 14.5 +/- 0.1 12.9 +/- 2.1 See the comments at the end of this table.

LOCATION INDICATOR Average (5) 15.8 +/- 10.1 14.4 +/- 6.9 17.6 +/- 9.7 17.4 +/- 9.1 CONTROL Average (5) 13.6 +/- 3.7 12.5 +/- 3.5 15.8 +/- 3.2 15.1 +/- 4.0 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, 2018 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 01/08/18 < 0.8 1421 +/- 163 < 6 < 7 < 23 < 7 < 14 02/05/18 < 0.5 1458 +/- 154 < 8 < 9 < 28 < 8 < 16 03/05/18 < 0.4 1330 +/- 223 < 11 < 12 < 41 < 11 < 18 04/09/18 < 0.4 1055 +/- 206 < 8 < 8 < 31 < 11 < 15 04/23/18 < 0.6 1231 +/- 181 < 6 < 8 < 29 < 6 < 15 05/07/18 < 0.5 1239 +/- 161 < 7 < 6 < 33 < 10 < 14 05/21/18 < 0.5 1313 +/- 181 < 6 < 7 < 29 < 7 < 14 06/04/18 < 0.5 1230 +/- 188 < 8 < 9 < 37 < 15 < 14 06/18/18 < 0.4 1224 +/- 183 < 6 < 9 < 28 < 14 < 15 07/02/18 < 0.4 1189 +/- 156 < 6 < 6 < 29 < 9 < 13 07/16/18 < 0.5 1359 +/- 190 < 8 < 9 < 35 < 12 < 16 07/30/18 < 0.5 1368 +/- 180 < 7 < 7 < 29 < 7 < 11 08/13/18 < 0.7 1329 +/- 151 < 6 < 7 < 38 < 10 < 13 08/27/18 < 0.3 1201 +/- 189 < 7 < 9 < 31 < 10 < 15 09/10/18 < 0.8 1228 +/- 187 < 7 < 8 < 38 < 14 < 15 09/24/18 < 0.7 1181 +/- 169 < 8 < 8 < 39 < 13 < 13 10/08/18 < 0.7 1331 +/- 176 < 6 < 9 < 39 < 12 < 14 10/22/18 < 0.6 1296 +/- 114 < 5 < 5 < 22 < 6 < 8 11/05/18 < 0.4 1444 +/- 202 < 8 < 7 < 37 < 10 < 18 12/10/18 < 0.5 1118 +/- 209 < 7 < 8 < 44 < 14 < 15 AVERAGE - 1277 +/- 213 - - - - -

13E3 01/08/18 < 0.5 1623 +/- 212 < 7 < 9 < 31 < 9 < 19 02/05/18 < 0.6 1192 +/- 181 < 6 < 7 < 29 < 8 < 15 03/05/18 < 0.5 1372 +/- 184 < 7 < 8 < 28 < 7 < 15 04/09/18 < 0.5 1223 +/- 174 < 8 < 11 < 26 < 11 < 16 04/23/18 < 0.4 1102 +/- 169 < 8 < 8 < 31 < 10 < 14 05/07/18 < 0.3 1055 +/- 124 < 5 < 6 < 31 < 8 < 11 05/21/18 < 0.2 1297 +/- 124 < 6 < 6 < 23 < 6 < 11 06/04/18 < 0.5 1291 +/- 205 < 8 < 9 < 41 < 12 < 16 06/18/18 < 0.4 1215 +/- 169 < 9 < 7 < 31 < 12 < 16 07/02/18 < 0.6 1184 +/- 133 < 5 < 6 < 21 < 6 < 11 07/16/18 < 0.7 1298 +/- 176 < 8 < 10 < 32 < 6 < 17 07/30/18 < 0.6 1292 +/- 186 < 8 < 8 < 32 < 9 < 16 08/13/18 < 0.4 1217 +/- 188 < 7 < 9 < 38 < 10 < 16 08/27/18 < 0.3 1305 +/- 239 < 7 < 8 < 31 < 6 < 17 09/10/18 < 0.7 1530 +/- 212 < 8 < 8 < 41 < 12 < 15 09/24/18 < 0.5 1256 +/- 163 < 8 < 9 < 40 < 15 < 16 10/08/18 < 0.6 1249 +/- 175 < 7 < 9 < 44 < 13 < 16 10/22/18 < 0.7 1263 +/- 125 < 5 < 5 < 25 < 8 < 8 11/05/18 < 0.5 1308 +/- 199 < 9 < 10 < 48 < 13 < 16 12/10/18 < 0.8 1170 +/- 210 < 8 < 7 < 47 < 10 < 15 AVERAGE - 1272 +/- 257 - - - - -

C-10

TABLE C-5 IODINE-131 AND GAMMA SPECTROSCOPIC ANALYSES OF MILK SUSQUEHANNA STEAM ELECTRIC STATION, 2018 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 01/08/18 < 0.7 1274 +/- 171 < 6 < 8 < 22 < 7 < 14 02/05/18 < 0.4 1228 +/- 172 < 8 < 10 < 32 < 6 < 14 03/05/18 < 0.5 1303 +/- 221 < 9 < 8 < 30 < 11 < 18 04/09/18 < 0.3 1310 +/- 160 < 6 < 9 < 31 < 10 < 15 04/23/18 < 0.3 1284 +/- 140 < 5 < 6 < 25 < 6 < 13 05/07/18 < 0.5 1179 +/- 143 < 6 < 6 < 33 < 9 < 11 05/21/18 < 0.3 1213 +/- 148 < 5 < 7 < 25 < 7 < 13 06/04/18 < 0.5 1235 +/- 148 < 6 < 6 < 28 < 5 < 13 06/18/18 < 0.4 1202 +/- 194 < 7 < 8 < 31 < 10 < 15 07/02/18 < 0.4 1279 +/- 164 < 6 < 8 < 24 < 8 < 13 07/16/18 < 0.7 1411 +/- 206 < 8 < 9 < 36 < 11 < 17 07/30/18 < 0.5 1284 +/- 202 < 8 < 8 < 31 < 12 < 18 08/13/18 < 0.6 1210 +/- 165 < 6 < 8 < 41 < 7 < 14 08/27/18 < 0.4 1349 +/- 171 < 7 < 8 < 32 < 9 < 16 09/10/18 < 0.7 1308 +/- 169 < 7 < 9 < 38 < 12 < 15 09/24/18 < 0.6 1388 +/- 164 < 6 < 7 < 34 < 9 < 15 10/08/18 < 0.5 1248 +/- 162 < 6 < 6 < 30 < 15 < 13 10/22/18 < 0.7 1273 +/- 130 < 4 < 6 < 22 < 8 < 10 11/05/18 < 0.5 1205 +/- 195 < 7 < 9 < 29 < 10 < 13 12/10/18 < 0.5 1077 +/- 171 < 6 < 6 < 31 < 13 < 12 AVERAGE - 1263 +/- 151 - - - - -

C-11

TABLE C-6 TRITIUM AND GAMMA SPECTROSCOPIC ANALYSES OF GROUNDWATER SUSQUEHANNA STEAM ELECTRIC STATION, 2018 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

12F3 01/22/18 < 143 < 106 < 6 < 6 < 13 < 6 < 12 < 8 < 10 < 8 < 7 < 6 < 26 < 7 < 12 05/03/18 < 132 < 55 < 3 < 3 < 11 < 4 < 6 < 4 < 7 < 11 < 3 < 4 < 23 < 7 < 6 AVERAGE - - - - - - - - - - - - - - -

2S2 01/22/18 < 143 < 116 < 7 < 8 < 19 < 10 < 14 < 9 < 14 < 8 < 7 < 9 < 27 < 10 < 14 05/09/18 < 132 < 89 < 5 < 4 < 12 < 5 < 10 < 5 < 9 < 8 < 4 < 4 < 22 < 8 < 9 AVERAGE - - - - - - - - - - - - - - -

2S8 01/22/18 < 140 < 82 < 10 < 10 < 27 < 10 < 24 < 13 < 15 < 13 < 13 < 12 < 34 < 13 < 26 05/01/18 < 143 < 54 < 3 < 3 < 7 < 3 < 6 < 3 < 5 < 5 < 3 < 3 < 15 < 5 < 5 08/02/18 < 140 < 62 < 6 < 7 < 17 < 6 < 12 < 7 < 13 < 11 < 6 < 6 < 31 < 9 < 15 10/31/18 < 148 < 72 < 6 < 6 < 15 < 8 < 13 < 7 < 10 < 10 < 6 < 6 < 29 < 11 < 12 AVERAGE - - - - - - - - - - - - - - -

4S4 01/22/18 < 141 < 151 < 7 < 7 < 26 < 11 < 18 < 10 < 18 < 10 < 9 < 10 < 37 < 14 < 16 05/03/18 < 128 < 43 < 4 < 4 < 13 < 4 < 8 < 4 < 8 < 11 < 4 < 4 < 25 < 10 < 7 AVERAGE - - - - - - - - - - - - - - -

6S10 01/22/18 < 146 < 142 < 5 < 6 < 13 < 6 < 10 < 7 < 10 < 9 < 6 < 7 < 23 < 7 < 11 05/03/18 < 131 < 36 < 5 < 5 < 11 < 3 < 9 < 5 < 10 < 15 < 4 < 5 < 30 < 11 < 8 AVERAGE - - - - - - - - - - - - - - -

11S2 01/22/18 < 140 < 112 < 5 < 8 < 22 < 8 < 10 < 6 < 12 < 9 < 6 < 9 < 27 < 10 < 19 05/03/18 < 131 < 36 < 4 < 4 < 11 < 4 < 8 < 4 < 8 < 13 < 4 < 4 < 28 < 9 < 7 AVERAGE - - - - - - - - - - - - - - -

13S7 01/26/18 151 +/- 92 < 124 < 7 < 8 < 24 < 8 < 16 < 8 < 11 < 11 < 8 < 7 < 29 < 11 < 14 04/30/18 < 145 < 13 < 1 < 1 < 2 < 1 < 2 < 1 < 1 < 2 < 1 < 1 < 5 < 2 < 2 07/30/18 < 149 < 48 < 4 < 5 < 14 < 4 < 8 < 4 < 8 < 10 < 4 < 3 < 23 < 8 < 9 10/30/18 < 150 < 56 < 7 < 7 < 18 < 8 < 13 < 6 < 11 < 12 < 6 < 6 < 31 < 11 < 13 AVERAGE 151 +/- 0 - - - - - - - - - - - - - -

Station was discontinued as of 05/30/18.

C-12

TABLE C-6 TRITIUM AND GAMMA SPECTROSCOPIC ANALYSES OF GROUNDWATER SUSQUEHANNA STEAM ELECTRIC STATION, 2018 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 1S3 01/26/18 354 +/- 103 < 141 < 7 < 7 < 19 < 7 < 14 < 9 < 12 < 11 < 7 < 7 < 36 < 13 < 13 04/30/18 161 +/- 94 < 34 < 3 < 4 < 10 < 4 < 6 < 4 < 6 < 8 < 3 < 3 < 22 < 7 < 7 07/30/18 220 +/- 97 < 104 < 5 < 5 < 15 < 5 < 11 < 6 < 10 < 10 < 5 < 5 < 27 < 8 < 10 10/30/18 < 150 < 44 < 5 < 6 < 13 < 5 < 12 < 5 < 10 < 8 < 5 < 5 < 24 < 8 < 9 AVERAGE 245 +/- 198 - - - - - - - - - - - - - -

4S8 01/26/18 280 +/- 97 < 153 < 10 < 10 < 23 < 9 < 18 < 10 < 15 < 14 < 9 < 9 < 43 < 15 < 17 04/30/18 169 +/- 97 < 32 < 5 < 6 < 15 < 6 < 9 < 6 < 10 < 12 < 5 < 6 < 24 < 10 < 10 07/30/18 198 +/- 96 < 42 < 5 < 5 < 15 < 5 < 8 < 5 < 8 < 10 < 5 < 6 < 27 < 10 < 11 10/30/18 < 149 < 48 < 6 < 5 < 14 < 4 < 11 < 6 < 8 < 9 < 5 < 5 < 26 < 8 < 9 AVERAGE 216 +/- 115 - - - - - - - - - - - - - -

4S9 01/25/18 194 +/- 93 < 104 < 5 < 6 < 18 < 7 < 14 < 7 < 12 < 9 < 6 < 7 < 34 < 10 < 12 04/27/18 < 146 < 24 < 2 < 3 < 7 < 3 < 6 < 3 < 5 < 11 < 3 < 3 < 20 < 7 < 5 07/27/18 < 148 < 51 < 3 < 3 < 10 < 4 < 6 < 4 < 6 < 9 < 3 < 3 < 20 < 7 < 6 10/29/18 < 128 < 64 < 6 < 5 < 21 < 6 < 12 < 7 < 10 < 10 < 6 < 5 < 30 < 10 < 11 AVERAGE 194 +/- 0 - - - - - - - - - - - - - -

6S11A 02/01/18 < 145 < 122 < 5 < 6 < 16 < 5 < 13 < 5 < 11 < 10 < 5 < 6 < 28 < 10 < 13 05/02/18 < 142 < 122 < 6 < 6 < 13 < 6 < 12 < 6 < 11 < 12 < 6 < 5 < 31 < 10 < 13 08/02/18 < 148 < 136 < 5 < 6 < 18 < 7 < 13 < 7 < 12 < 11 < 7 < 7 < 29 < 13 < 13 10/31/18 < 127 < 55 < 6 < 5 < 18 < 6 < 12 < 7 < 10 < 9 < 6 < 6 < 24 < 10 < 12 AVERAGE - - - - - - - - - - - - - - -

6S12 02/08/18 < 146 < 61 < 8 < 10 < 25 < 13 < 18 < 9 < 18 < 11 < 9 < 10 < 33 < 9 < 18 05/01/18 < 147 < 26 < 3 < 3 < 8 < 3 < 5 < 3 < 4 < 6 < 3 < 3 < 14 < 5 9 +/-4 07/26/18 < 145 < 100 < 4 < 5 < 13 < 4 < 10 < 5 < 8 < 15 < 4 < 4 < 36 < 9 < 7 10/29/18 < 149 < 120 < 6 < 6 < 20 < 6 < 12 < 7 < 12 < 12 < 5 < 5 < 29 < 11 < 12 AVERAGE - - - - - - - - - - - - - - 9 +/-0 7S10 01/29/18 176 +/- 94 < 161 < 9 < 8 < 17 < 9 < 20 < 11 < 16 < 10 < 9 < 8 < 33 < 13 < 19 04/27/18 < 145 < 17 < 1 < 1 < 2 < 1 < 1 < 1 < 1 < 2 < 1 < 1 < 5 < 2 < 1 07/31/18 < 138 < 60 < 6 < 5 < 16 < 7 < 15 < 7 < 10 < 12 < 6 < 6 < 32 < 9 < 12 11/01/18 < 130 < 154 < 8 < 7 < 15 < 8 < 15 < 8 < 14 < 13 < 7 < 8 < 33 < 15 < 14 AVERAGE 176 +/- 0 - - - - - - - - - - - - - -

C-13

TABLE C-6 TRITIUM AND GAMMA SPECTROSCOPIC ANALYSES OF GROUNDWATER SUSQUEHANNA STEAM ELECTRIC STATION, 2018 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 7S11 01/29/18 147 +/- 91 < 65 < 8 < 9 < 22 < 8 < 18 < 8 < 12 < 11 < 9 < 9 < 31 < 11 < 17 04/27/18 < 144 < 52 < 3 < 3 < 10 < 3 < 6 < 3 < 6 < 12 < 3 < 3 < 26 < 9 < 6 07/31/18 < 143 < 109 < 5 < 5 < 14 < 6 < 10 < 4 < 10 < 11 < 5 < 7 < 30 < 11 < 12 11/01/18 < 149 < 91 < 8 < 6 < 13 < 7 < 18 < 6 < 10 < 9 < 6 < 9 < 29 < 12 < 13 AVERAGE 147 +/- 0 - - - - - - - - - - - - - -

8S4 01/26/18 155 +/- 95 < 50 < 7 < 7 < 16 < 4 < 16 < 6 < 9 < 9 < 5 < 8 < 31 < 9 < 12 04/30/18 < 144 < 47 < 5 < 5 < 14 < 6 < 11 < 6 < 10 < 12 < 4 < 5 < 28 < 9 < 10 07/30/18 < 148 < 71 < 6 < 5 < 16 < 7 < 13 < 6 < 12 < 12 < 6 < 7 < 34 < 12 < 11 10/30/18 < 150 < 67 < 5 < 5 < 13 < 4 < 9 < 4 < 8 < 8 < 4 < 4 < 24 < 7 < 9 AVERAGE 155 +/- 0 - - - - - - - - - - - - - -

C-14

TABLE C-7 ANNUAL AVERAGE TRITIUM CONCENTRATION IN PRECIPITATION, MONITORING WELLS AND LAKE TOOK-A-WHILE (LTAW) SURFACE WATER DATA SUSQUEHANNA STEAM ELECTRIC STATION, 2018 Results in pCi/Liter +/- 2 sigma SITE 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 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 Precipitation Sites 3 and 4 (onsite, West of Station Reactor Bldgs) 414 404* 350 233 169 151 231 258 197 383 494 1S3 - MW-1 (43') 248 150 252 131 164 197 115 169 175 130 218 4S8 - MW-2 (45') 292 154 190 173 137 202 187 138 154 138 191 4S9 - MW-3 (94') 127 54 150 64 80 135 94 180 125 55 109 8S4 - MW-4 (111') 172 66 105 68 81 109 60 162 145 91 102 7S10 - MW-5 (36') 171 69 96 -6 74 106 68 70 73 51 93 13S7 - MW-6 (16') 142 134 143 34 80 111 71 79 111 107 122 2S8 - MW-7 (85') Not installed Not installed Not installed 22 54 72 70 70 74 56 37 6S11A - MW-8A (14') 177 82 165 58 15 72 103 110 63 38 50 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 6S12 - MW-9 (28') 30 -44 45 18 6 60 21 57 70 5 27 7S11 - MW-10 (132') 3 -27 -9 1 -1 23 29 55 13 1 33

- 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.

- Station was discontinued after 5/30/18.

C-15

TABLE C-8 GROSS BETA, TRITIUM AND GAMMA SPECTROSCOPIC ANALYSES OF DRINKING WATER SUSQUEHANNA STEAM ELECTRIC STATION, 2018 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 12/26/17 - 01/23/18 < 2.0 < 143 < 22 < 2 < 3 < 8 < 3 < 4 < 3 < 5 < 9 < 2 < 2 < 20 < 6 12H2 01/23/18 - 02/27/18 < 2.1 < 130 < 14 < 2 < 2 < 6 < 2 < 3 < 2 < 3 < 12 < 2 < 2 < 19 < 6 12H2 02/27/18 - 03/27/18 < 1.8 < 137 < 17 < 2 < 2 < 6 < 2 < 4 < 2 < 4 < 11 < 2 < 2 < 19 < 6 12H2 03/27/18 - 04/24/18 < 2.1 < 145 < 13 < 1 < 1 < 5 < 1 < 3 < 2 < 3 < 14 < 1 < 1 < 19 < 5 12H2 04/24/18 - 05/29/18 < 2.1 < 137 < 42 < 2 < 2 < 8 < 2 < 4 < 2 < 4 < 15 < 2 < 2 < 24 < 10 12H2 05/29/18 - 06/26/18 2.4 +/- 1.4 < 143 < 29 < 2 < 2 < 5 < 2 < 3 < 2 < 3 < 9 < 1 < 2 < 16 < 6 12H2 06/26/18 - 07/24/18 2.8 +/- 1.6 < 138 < 13 < 1 < 2 < 5 < 1 < 3 < 2 < 3 < 9 < 1 < 1 < 14 < 5 12H2 07/24/18 - 08/28/18 < 2.0 < 144 < 33 < 2 < 2 < 6 < 2 < 4 < 2 < 3 < 15 < 2 < 2 < 22 < 8 12H2 08/28/18 - 09/25/18 3.3 +/- 1.4 < 137 < 38 < 2 < 3 < 7 < 3 < 4 < 3 < 5 < 14 < 2 < 2 < 26 < 8 12H2 09/25/18 - 10/23/18 < 1.9 < 149 < 50 < 3 < 3 < 6 < 3 < 6 < 3 < 5 < 14 < 3 < 3 < 26 < 9 12H2 10/23/18 - 11/27/18 2.2 +/- 1.3 < 149 < 15 < 2 < 2 < 5 < 2 < 4 < 2 < 3 < 13 < 2 < 2 < 21 < 7 12H2 11/27/18 - 12/31/18 < 2.0 < 141 < 33 < 2 < 2 < 7 < 2 < 4 < 2 < 3 < 13 < 2 < 2 < 20 < 9 AVERAGE 2.7 +/- 1.0 - - - - - - - - - - - - - -

C-16

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

SUSQUEHANNA STEAM ELECTRIC STATION, 2018 Results in pCi/kg (wet) +/- 2 sigma COLLECTION SITE DATE Be-7 K-40 I-131 Cs-134 Cs-137 Ac-228 Th-228 8G1 06/25/18 246 +/- 106 2599 +/- 398 < 22 < 17 < 17 < 58 < 33 06/25/18 < 151 4503 +/- 440 < 22 < 15 < 14 < 71 < 33 06/25/18 < 198 4927 +/- 582 < 24 < 17 < 21 < 71 < 32 07/23/18 338 +/- 198 3974 +/- 435 < 26 < 18 < 18 < 72 < 38 07/23/18 < 317 3910 +/- 531 < 44 < 47 < 31 < 142 < 67 07/23/18 408 +/- 201 2975 +/- 643 < 35 < 17 < 28 < 79 < 44 08/27/18 667 +/- 346 4926 +/- 628 < 56 < 29 < 32 < 127 < 54 08/27/18 796 +/- 185 3551 +/- 497 < 47 < 25 < 27 < 111 < 44 08/27/18 850 +/- 253 4630 +/- 634 < 36 < 22 < 15 < 99 < 40 09/17/18 357 +/- 145 2787 +/- 346 < 31 < 16 < 17 < 81 < 35 09/17/18 452 +/- 196 3684 +/- 612 < 45 < 23 < 26 < 111 < 44 09/17/18 706 +/- 190 3504 +/- 494 < 42 < 17 < 22 < 78 < 34 10/15/18 478 +/- 212 3314 +/- 536 < 48 < 19 < 30 < 82 < 39 10/15/18 < 239 3927 +/- 532 < 49 < 24 < 27 < 85 < 37 10/15/18 642 +/- 216 4007 +/- 533 < 50 < 29 < 29 < 108 < 49 AVERAGE 540 +/- 403 3815 +/- 1451 - - - - -

11D1 10/05/18 < 166 1688 +/- 361 < 55 < 22 < 23 < 110 < 37 12/10/18 < 246 3700 +/- 533 < 54 < 25 < 28 < 96 < 40 12/10/18 < 297 16720 +/- 1053 < 58 < 35 < 31 < 132 < 55 AVERAGE - 7369 +/- 16320 - - - - -

11S6 06/25/18 313 +/- 156 2294 +/- 436 < 25 < 13 < 21 < 70 < 32 06/25/18 < 166 5314 +/- 542 < 23 < 17 < 20 < 69 < 33 06/25/18 < 163 4387 +/- 467 < 20 < 14 < 20 < 67 < 26 07/23/18 722 +/- 204 3857 +/- 553 < 28 < 23 < 23 < 69 < 40 07/23/18 593 +/- 309 4828 +/- 573 < 35 < 28 < 27 < 113 < 55 07/23/18 802 +/- 207 4105 +/- 475 < 26 < 19 < 23 < 77 < 38 08/27/18 1038 +/- 228 6022 +/- 579 < 39 < 23 < 22 < 87 < 41 08/27/18 782 +/- 221 5347 +/- 594 < 34 < 14 < 19 < 81 < 35 08/27/18 < 200 3703 +/- 539 < 39 < 19 < 20 < 96 < 39 09/17/18 410 +/- 136 3091 +/- 433 < 29 < 14 < 18 < 69 < 32 09/17/18 762 +/- 185 5980 +/- 511 < 38 < 18 < 18 < 79 < 34 09/17/18 733 +/- 205 3962 +/- 456 < 37 < 21 < 22 < 93 < 39 10/15/18 414 +/- 177 2978 +/- 409 < 52 < 22 < 22 < 92 < 40 10/15/18 < 147 4424 +/- 567 < 40 < 17 < 18 < 88 < 33 10/15/18 422 +/- 228 4015 +/- 548 < 50 < 20 < 24 < 97 < 38 AVERAGE 635 +/- 445 4287 +/- 2153 - - - - -

C-17

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

SUSQUEHANNA STEAM ELECTRIC STATION, 2018 Results in pCi/kg (wet) +/- 2 sigma COLLECTION SITE DATE Be-7 K-40 I-131 Cs-134 Cs-137 Ac-228 Th-228 12F7 01/10/18 < 198 3004 +/- 470 < 29 < 21 < 27 < 90 < 45 AVERAGE - 3004 +/- 0 - - - - -

3S3 06/25/18 < 158 2539 +/- 392 < 26 < 16 < 21 < 62 < 27 06/25/18 < 231 4794 +/- 581 < 30 < 21 < 26 < 84 < 39 06/25/18 < 194 3814 +/- 442 < 28 < 19 < 23 < 91 < 36 07/23/18 702 +/- 167 3492 +/- 485 < 30 < 24 < 23 < 82 < 43 07/23/18 567 +/- 278 4031 +/- 578 < 30 < 23 < 27 < 113 < 36 07/23/18 683 +/- 201 4493 +/- 503 < 36 < 35 < 32 < 119 < 47 08/27/18 639 +/- 207 4063 +/- 490 < 37 < 14 < 20 < 79 < 34 08/27/18 476 +/- 273 5928 +/- 678 < 57 < 27 < 27 < 110 < 53 08/27/18 495 +/- 141 4970 +/- 507 < 28 < 17 < 18 < 79 < 34 09/17/18 458 +/- 157 2286 +/- 417 < 39 < 18 < 23 < 80 < 38 09/17/18 395 +/- 173 4616 +/- 552 < 38 < 21 < 25 < 105 < 43 09/17/18 769 +/- 200 3470 +/- 492 < 29 < 19 < 19 < 74 < 35 10/15/18 386 +/- 160 3094 +/- 431 < 51 < 25 < 27 < 108 < 44 10/15/18 343 +/- 200 3654 +/- 543 < 51 < 24 < 24 < 105 < 43 10/15/18 471 +/- 226 3423 +/- 554 < 47 < 23 < 26 < 109 < 45 AVERAGE 532 +/- 276 3911 +/- 1906 - - - - -

C-18

TABLE C-10 TRITIUM AND GAMMA SPECTROSCOPIC ANALYSES OF SURFACE WATER SUSQUEHANNA STEAM ELECTRIC STATION, 2018 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 12/26/17 - 01/23/18 < 143 < 22 < 2 <2 <6 < 2 < 4 < 3 < 4 < 9 <2 <2 < 18 <5 < 4 01/23/18 - 02/27/18 < 130 < 30 < 2 < 2 <6 < 2 < 4 < 2 < 4 < 15 <2 <2 < 21 <8 12 +/- 3 01/30/18 - 01/30/18 < 134 < 24 < 1 < 1 <3 <1 < 1 < 1 < 2 < 15 < 1 <1 < 16 <5 <2 02/27/18 - 03/27/18 < 137 < 14 <1 <2 < 5 < 2 < 3 <2 <3 < 9 <1 <2 < 16 < 5 <3 03/27/18 - 04/24/18 < 146 47 +/- 28 < 1 <2 <4 < 1 < 3 < 2 < 3 < 15 <1 <1 < 22 <7 <3 04/24/18 - 05/29/18 < 142 < 27 < 1 < 2 < 6 <2 <3 <2 <3 < 14 < 2 <2 < 21 <6 < 4 05/29/18 - 06/26/18 < 144 < 30 < 1 <2 <5 < 2 < 3 < 2 < 3 < 8 <1 <1 < 14 <6 <2 06/26/18 - 07/24/18 < 142 < 32 <2 < 2 < 5 <2 <3 <2 < 3 < 10 < 2 <2 < 17 <5 < 4 07/24/18 - 08/28/18 < 150 < 14 < 2 < 2 <6 < 2 < 3 < 2 < 3 < 14 < 1 <2 < 22 <6 < 3 08/28/18 - 09/25/18 < 148 < 16 <2 <2 <5 <2 <3 < 2 < 4 < 12 <2 <2 < 20 <6 <3 09/25/18 - 10/23/18 < 130 < 35 < 2 < 2 < 7 < 2 < 4 < 2 <4 < 14 <2 < 2 < 23 <7 <3 10/23/18 - 11/27/18 < 149 < 37 < 2 <2 <6 <2 <3 < 2 < 3 < 13 < 1 < 2 < 19 <6 <3 11/27/18 - 12/31/18 < 139 < 29 < 2 < 2 <7 <2 <3 <2 < 3 < 13 < 1 < 2 < 21 < 7 < 3 AVERAGE - 47 +/- 0 - - - - - - - - - - - - 12 +/- 0

- 5S9 - - - - - - - - - - - - - - - - -

AVERAGE - - - - - - - - - - - - - - -

2S7 12/26/17 - 01/23/18 344 +/- 109 < 23 < 2 < 3 < 7 < 3 < 5 < 3 < 5 < 10 < 2 < 3 < 21 < 7 <5 01/23/18 - 02/27/18 438 +/- 108 < 18 < 2 < 2 < 7 < 2 < 3 < 2 < 4 < 13 < 1 < 2 < 21 < 9 6 +/-3 01/30/18 - 01/30/18 < 137 < 19 < 1 < 1 < 3 < 1 < 1 < 1 < 2 < 14 < 1 < 1 < 13 < 5 < 2 02/27/18 - 03/27/18 1140 +/- 176 < 25 < 2 < 2 < 5 < 2 < 3 < 2 < 3 < 10 < 1 < 2 < 16 < 5 < 3 03/27/18 - 04/24/18 6170 +/- 674 < 35 < 1 < 2 < 6 < 2 < 3 < 2 < 3 < 14 < 2 < 2 < 22 < 9 < 3 04/24/18 - 05/29/18 2890 +/- 281 < 10 < 1 < 1 < 4 < 1 < 2 < 1 < 2 < 14 < 1 < 1 < 19 < 6 < 2 05/29/18 - 06/26/18 204 +/- 98 < 35 < 1 < 2 < 5 < 2 < 3 < 2 < 3 < 9 < 1 < 2 < 15 < 5 < 3 06/26/18 - 07/24/18 190 +/- 96 < 18 < 2 < 2 < 7 < 2 < 4 < 2 < 4 < 12 < 2 < 2 < 20 < 6 < 4 07/24/18 - 08/28/18 2890 +/- 276 < 13 < 2 < 2 < 5 < 2 < 3 < 2 < 3 < 13 < 1 < 1 < 20 < 7 < 2 08/28/18 - 09/25/18 3950 +/- 357 < 9 < 1 < 1 < 3 < 1 < 2 < 1 < 2 < 6 < 1 < 1 < 11 < 3 < 2 09/25/18 - 10/23/18 592 +/- 125 < 38 < 2 < 2 < 8 < 2 < 5 < 2 < 5 < 15 < 2 < 2 < 24 < 8 6 +/-3 10/23/18 - 11/27/18 221 +/- 102 < 32 < 2 < 2 < 5 < 2 < 3 < 2 < 3 < 13 < 2 < 2 < 20 < 7 <3 11/27/18 - 12/31/18 354 +/- 100 < 14 < 2 < 2 < 5 < 2 < 3 < 2 < 3 < 15 < 2 < 2 < 22 < 6 < 4 AVERAGE 1615 +/- 3874 - - - - - - - - - - - - - 6 +/-0 6S5 01/02/18 - 01/23/18 < 144 < 55 < 3 < 3 < 9 < 3 < 6 < 3 < 6 < 8 < 3 < 3 < 19 < 6 < 5 01/30/18 - 02/27/18 < 133 < 40 < 2 < 2 < 6 < 2 < 4 < 3 < 5 < 14 < 2 < 2 < 24 < 8 < 4 03/06/18 - 03/27/18 < 137 < 21 < 2 < 3 < 7 < 2 < 5 < 3 < 4 < 10 < 2 < 2 < 19 < 6 < 4 04/03/18 - 04/24/18 < 148 < 16 < 2 < 2 < 6 < 2 < 4 < 2 < 3 < 13 < 2 < 2 < 20 < 6 < 3 05/01/18 - 05/29/18 < 147 45 +/- 26 < 2 < 2 < 6 < 2 < 4 < 2 < 4 < 13 < 2 < 2 < 21 < 7 < 3 06/05/18 - 06/26/18 < 147 < 22 < 1 < 1 < 4 < 1 < 3 < 1 < 3 < 6 < 1 < 1 < 11 < 4 < 2 C-19

TABLE C-10 TRITIUM AND GAMMA SPECTROSCOPIC ANALYSES OF SURFACE WATER SUSQUEHANNA STEAM ELECTRIC STATION, 2018 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 07/02/18 - 07/24/18 < 145 < 14 < 2 <2 < 5 < 2 < 3 < 2 < 3 <7 <1 <2 < 13 <4 <3 (cont'd) 07/31/18 - 08/28/18 210 +/- 94 < 21 < 2 < 2 <7 < 2 < 5 < 2 < 4 < 14 <2 <2 < 23 <8 <4 09/04/18 - 09/25/18 < 143 < 17 < 2 < 2 <6 < 2 < 4 < 2 < 4 <9 < 2 <2 < 17 <5 <3 10/02/18 - 10/23/18 < 150 < 34 <2 < 2 < 6 < 2 <4 <2 <4 < 9 <2 <2 < 18 <6 <4 10/30/18 - 11/27/18 < 145 < 31 < 2 < 2 <7 < 2 < 4 < 2 < 4 < 11 < 2 <2 < 19 < 6 <3 12/04/18 - 12/31/18 < 142 < 24 < 2 <3 < 10 < 4 < 6 < 3 < 6 < 14 <3 <3 < 28 < 11 <5 AVERAGE 210 +/- 0 45 +/- 0 - - - - - - - - - - - - -

4S7 02/15/18 - 02/15/18 390 +/- 100 < 66 < 8 < 7 < 27 < 7 < 15 <6 < 14 < 12 <8 <8 < 39 < 13 < 12 05/03/18 - 05/03/18 187 +/- 87 < 85 < 4 < 4 < 13 < 5 < 10 <4 <8 < 10 < 3 < 4 < 27 < 10 <6 AVERAGE 289 +/- 287 - - - - - - - - - - - - - -

LTAW 02/15/18 - 02/15/18 < 149 101 +/- 42 < 6 < 7 < 20 <7 < 14 < 9 < 14 < 15 < 8 <8 < 39 <9 < 14 05/03/18 - 05/03/18 < 143 < 97 <4 <4 < 10 < 4 < 7 <4 <7 < 13 <4 < 4 < 32 < 8 <8 AVERAGE - 101 +/- 0 - - - - - - - - - - - - -

5S12 02/15/18 - 02/15/18 < 143 < 141 < 8 <6 < 19 <7 < 14 <7 < 9 < 13 < 5 < 6 < 30 < 14 < 13 05/03/18 - 05/03/18 < 143 < 43 < 4 <4 < 10 <5 < 10 < 5 < 8 < 11 <4 <5 < 29 <8 < 8 AVERAGE - - - - - - - - - - - - - - -

7S12 02/15/18 - 02/15/18 < 150 < 115 < 6 < 6 < 13 < 7 < 11 < 7 < 13 < 12 < 6 <6 < 34 < 8 < 12 05/03/18 - 05/03/18 169 +/- 86 < 58 < 4 < 4 < 12 < 3 < 6 < 4 < 7 < 10 <4 < 4 < 22 < 8 <8 AVERAGE 169 +/- 0 - - - - - - - - - - - - - -

Station was discontinued after 5/30/18.

- No samples taken from station in 2018.

C-20

TABLE C-11 GAMMA SPECTROSCOPIC ANALYSIS OF FISH SUSQUEHANNA STEAM ELECTRIC STATION, 2018 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 05/10/18 3059 +/- 690 < 49 < 32 < 142 < 62 < 94 < 52 < 44 Smallmouth Bass 05/10/18 3387 +/- 1208 < 79 < 69 < 162 < 99 < 163 < 77 < 91 Shorthead Redhorse 05/10/18 4598 +/- 978 < 53 < 59 < 158 < 41 < 93 < 48 < 58 Walleye 10/19/18 3693 +/- 1079 < 78 < 58 < 230 < 54 < 148 < 62 < 63 Shorthead Redhorse 10/19/18 2913 +/- 811 < 61 < 59 < 113 < 45 < 116 < 47 < 56 Smallmouth Bass 10/19/18 3453 +/- 951 < 67 < 79 < 155 < 61 < 148 < 61 < 65 AVERAGE 3517 +/- 1198 - - - - - - -

IND Channel Catfish 05/09/18 3440 +/- 877 < 40 < 50 < 171 < 43 < 71 < 45 < 39 Shorthead Redhorse 05/09/18 5034 +/- 1033 < 61 < 63 < 168 < 45 < 123 < 61 < 67 Smallmouth Bass 05/09/18 3009 +/- 1066 < 62 < 58 < 178 < 62 < 149 < 70 < 67 Smallmouth Bass 10/18/18 2988 +/- 812 < 47 < 36 < 119 < 67 < 91 < 49 < 44 Walleye 10/18/18 2666 +/- 1286 < 93 < 76 < 215 < 68 < 168 < 84 < 99 Shorthead Redhorse 10/18/18 3730 +/- 1008 < 62 < 57 < 203 < 75 < 158 < 58 < 62 AVERAGE 3478 +/- 1698 - - - - - - -

LTAW Rainbow Trout 10/19/18 3911 +/- 1003 < 87 < 77 < 249 < 65 < 145 < 76 < 91 Largemouth Bass 10/19/18 3996 +/- 1128 < 80 < 76 < 220 < 78 < 205 < 80 < 89 AVERAGE 3954 +/- 120 - - - - - - -

C-21

TABLE C-12 GAMMA SPECTROSCOPIC ANALYSES OF SHORELINE SEDIMENT SUSQUEHANNA STEAM ELECTRIC STATION, 2018 Results in pCi/kg (dry) +/- 2 sigma COLLECTION SITE DATE K-40 Cs-134 Cs-137 Ra-226 Ac-228 Th-228 2B 04/24/18 10830 +/- 1157 < 44 < 57 1547 +/- 959 912 +/- 238 956 +/- 89 10/25/18 14350 +/- 2345 < 140 < 151 < 2999 1184 +/- 421 1429 +/- 238 AVERAGE 12590 +/- 4978 - - 1547 +/- 0 1048 +/- 385 1193 +/- 668 7B 04/24/18 8009 +/- 1007 < 44 < 62 1686 +/- 980 796 +/- 203 832 +/- 87 10/25/18 10320 +/- 1396 < 70 < 91 2800 +/- 1269 913 +/- 300 965 +/- 143 AVERAGE 9165 +/- 3268 - - 2243 +/- 1575 855 +/- 166 899 +/- 188 12F 04/24/18 7801 +/- 781 < 49 < 55 1524 +/- 778 605 +/- 193 776 +/- 67 10/25/18 7160 +/- 1700 < 115 < 108 < 2656 1024 +/- 485 880 +/- 182 AVERAGE 7481 +/- 907 - - 1524 +/- 0 814 +/- 593 828 +/- 147 C-22

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 Criticality E 09/10/1982 200 C

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

Indicator Control C-23

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 09/10/1982 Criticality Changed from TLD 05/08/1984 to OSLD system 5 01/18/12 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-24

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 30 CHERNOBYL 4/26/86 Unit 1 Criticality 20 09/10/1982 Unit 2 10 Criticality 05/08/1984 B

C 0

Indicator Control C-25

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 2018 Investigation Level MDC C-26

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 Unit 2 1 Criticality 05/08/1984 0

C-27

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-28

Intentionally left blank C-29

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 2018 E12133 Milk Sr-89 pCi/L 76.1 90.1 0.84 A Sr-90 pCi/L 12.2 12.5 0.98 A E12134 Milk Ce-141 pCi/L 77.8 77.0 1.01 A Co-58 pCi/L 105 114 0.92 A Co-60 pCi/L 181 187 0.97 A Cr-51 pCi/L 298 326 0.92 A Cs-134 pCi/L 150 180 0.84 A Cs-137 pCi/L 164 172 0.95 A Fe-59 pCi/L 140 139 1.01 A I-131 pCi/L 105 108.0 0.97 A Mn-54 pCi/L 133 131 1.01 A Zn-65 pCi/L 242 244 0.99 A E12135 Charcoal I-131 pCi 93.7 95.4 0.98 A E12136 AP Ce-141 pCi 92.6 85.3 1.09 A Co-58 pCi 130 126 1.03 A Co-60 pCi 237 207 1.14 A Cr-51 pCi 411 361 1.14 A Cs-134 pCi 194 199 0.98 A Cs-137 pCi 200 191 1.05 A Fe-59 pCi 160 154 1.04 A Mn-54 pCi 152 145 1.05 A Zn-65 pCi 267 271 0.99 A E12137 Water Fe-55 pCi/L 1990 1700 1.17 A E12138 Soil Ce-141 pCi/g 0.148 0.118 1.26 W Co-58 pCi/g 0.171 0.174 0.98 A Co-60 pCi/g 0.297 0.286 1.04 A Cr-51 pCi/g 0.537 0.498 1.08 A Cs-134 pCi/g 0.274 0.275 1.00 A Cs-137 pCi/g 0.355 0.337 1.05 A Fe-59 pCi/g 0.243 0.212 1.15 A Mn-54 pCi/g 0.228 0.201 1.14 A Zn-65 pCi/g 0.395 0.374 1.06 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 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 June 2018 E12205 Milk Sr-89 pCi/L 74.9 84.6 0.89 A Sr-90 pCi/L 10.5 11.4 0.92 A E12206 Milk Ce-141 pCi/L 89.2 82.2 1.08 A Co-58 pCi/L 94.8 89 1.07 A Co-60 pCi/L 125 113 1.10 A Cr-51 pCi/L 256 239 1.07 A Cs-134 pCi/L 112 114 0.99 A Cs-137 pCi/L 107 98.8 1.08 A Fe-59 pCi/L 95.9 86.0 1.12 A I-131 pCi/L 69.8 71.9 0.97 A Mn-54 pCi/L 138 130 1.06 A Zn-65 pCi/L 186 157 1.18 A E12207 Charcoal I-131 pCi 69.6 72.2 0.96 A E12208 AP Ce-141 pCi 151 165 0.92 A Co-58 pCi 174 178 0.98 A Co-60 pCi 290 227 1.28 W Cr-51 pCi 452 478 0.95 A Cs-134 pCi 215 227 0.95 A Cs-137 pCi 206 198 1.04 A Fe-59 pCi 180 172 1.05 A Mn-54 pCi 265 260 1.02 A Zn-65 pCi 280 315 0.89 A E12209 Water Fe-55 pCi/L 1790 1740 1.03 A E12210 AP Sr-89 pCi 77.8 90.3 0.86 A Sr-90 pCi 9.54 12.2 0.78 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-3

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 2018 E12271 Milk Sr-89 pCi/L 79.4 81.7 0.97 A Sr-90 pCi/L 12.2 14.8 0.82 A E12272 Milk Ce-141 pCi/L 152 128 1.19 A Co-58 pCi/L 161 144 1.12 A Co-60 pCi/L 208 190 1.10 A Cr-51 pCi/L 244 265 0.92 A Cs-134 pCi/L 124 123 1.01 A Cs-137 pCi/L 166 147 1.13 A Fe-59 pCi/L 158 119 1.32 N(1)

I-131 pCi/L 83.1 58.2 1.43 N(2)

Mn-54 pCi/L 191 167 1.14 A Zn-65 pCi/L 229 201 1.14 A E12273 Charcoal I-131 pCi 83.0 80.7 1.03 A E12274 AP Ce-141 pCi 101 85.6 1.18 A Co-58 pCi 92.7 96.0 0.97 A Co-60 pCi 142 127 1.12 A Cr-51 pCi 218 177 1.23 W Cs-134 pCi 81.2 81.9 0.99 A Cs-137 pCi 99.0 98.5 1.01 A Fe-59 pCi 93.7 79.7 1.18 A Mn-54 pCi 116 112 1.04 A Zn-65 pCi 139 134 1.04 A E12302 Water Fe-55 pCi/L 2120 1820 1.17 A E12276 Soil Ce-141 pCi/g 0.259 0.221 1.17 A Co-58 pCi/g 0.279 0.248 1.12 A Co-60 pCi/g 0.367 0.328 1.12 A Cr-51 pCi/g 0.597 0.457 1.31 N (3)

Cs-134 pCi/g 0.261 0.212 1.23 W Cs-137 pCi/g 0.376 0.330 1.14 A Fe-59 pCi/g 0.248 0.206 1.20 A Mn-54 pCi/g 0.317 0.289 1.10 A Zn-65 pCi/g 0.407 0.347 1.17 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 18-20 (2) See NCR 18-24 (3) See NCR 18-21 D-4

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 December 2018 E12313 Milk Sr-89 pCi/L 71.9 91.9 0.78 W Sr-90 pCi/L 12.1 13.3 0.91 A E12314 Milk Ce-141 pCi/L 124 133 0.93 A Co-58 pCi/L 110 119 0.93 A Co-60 pCi/L 202 212 0.95 A Cr-51 pCi/L 292 298 0.98 A Cs-134 pCi/L 146 171 0.85 A Cs-137 pCi/L 118 121 0.98 A Fe-59 pCi/L 120 114 1.05 A I-131 pCi/L 94.2 93.3 1.01 A Mn-54 pCi/L 151 154 0.98 A Zn-65 pCi/L 266 264 1.01 A E12315 Charcoal I-131 pCi 94.8 89.9 1.05 A E12316A AP Ce-141 pCi 92.3 94.0 0.98 A Co-58 pCi 73.4 83.8 0.88 A Co-60 pCi 137 150 0.91 A Cr-51 pCi 202 210 0.96 A Cs-134 pCi 115 121 0.95 A Cs-137 pCi 85.0 85.4 1.00 A Fe-59 pCi 83.1 80.8 1.03 A Mn-54 pCi 104 109 0.96 A Zn-65 pCi 168 187 0.90 A E12317 Water Fe-55 pCi/L 2110 1840 1.15 A E12318 AP Sr-89 pCi 81.1 83.0 0.98 A Sr-90 pCi 11.4 12.0 0.95 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 D-5

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 2018 18-MaS38 Soil Ni-63 Bq/kg 9.94 (1) A Sr-90 Bq/kg 0.846 (1) A 18-MaW38 Water Am-241 Bq/L 0.785 0.709 0.496 - 0.922 A Ni-63 Bq/L 12.6 14.0 9.8 - 18.2 A Pu-238 Bq/L 0.0214 0.023 (2) A Pu-239/240 Bq/L 0.544 0.600 0.420 - 0.780 A 18-RdF38 AP U-234/233 Bq/sample 0.111 0.124 0.087 - 0.161 A U-238 Bq/sample 0.123 0.128 0.090 - 0.166 A 18-RdV38 Vegetation Cs-134 Bq/sample 2.46 3.23 2.26 - 4.20 W Cs-137 Bq/sample 3.14 3.67 2.57 - 4.77 A Co-57 Bq/sample 4.12 4.42 3.09 - 5.75 A Co-60 Bq/sample 1.86 2.29 1.60 - 2.98 A Mn-54 Bq/sample 2.21 2.66 1.86 - 3.46 A Sr-90 Bq/sample NR(3)

Zn-65 Bq/sample -0.201 (1) A November 2018 18-MaS39 Soil Ni-63 Bq/kg 703 765 536 - 995 A Sr-90 Bq/kg 137 193 135 - 251 W 18-MaW39 Water Am-241 Bq/L 0.0363 (1) A Ni-63 Bq/L 6.18 7.0 4.9 - 9.1 A Pu-238 Bq/L 0.73 0.674 0.472 - 0.876 A Pu-239/240 Bq/L 0.89 0.928 0.650 - 1.206 A 18-RdF39 AP U-234/233 Bq/sample 0.159 0.152 0.106 - 0.198 A U-238 Bq/sample 0.162 0.158 0.111 - 0.205 A 18-RdV39 Vegetation Cs-134 Bq/sample 1.85 1.94 1.36 - 2.52 A Cs-137 Bq/sample 2.5 2.36 1.65 - 3.07 A Co-57 Bq/sample 3.53 3.31 2.32 - 4.30 A Co-60 Bq/sample 1.6 1.68 1.18 - 2.18 A Mn-54 Bq/sample 2.61 2.53 1.77 - 3.29 A Sr-90 Bq/sample 0.338 0.791 0.554 - 1.028 N(4)

Zn-65 Bq/sample 1.32 1.37 0.96 - 1.78 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 18-09 (4) See NCR 18-25 D-6

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

Number Value (a) Limits Value March 2018 MRAD-28 AP GR-A pCi/sample 65.7 43.4 22.7 - 71.5 A GR-B pCi/sample 57.2 52 31.5 - 78.6 A April 2018 RAD-113 Water Ba-133 pCi/L 91.2 91.5 77.1 - 101 A Cs-134 pCi/L 70.4 75.9 62.0 - 83.5 A Cs-137 pCi/L 122 123 111 - 138 A Co-60 pCi/L 64.8 64.3 57.9 - 73.2 A Zn-65 pCi/L 98.6 86.7 78.0 - 104 A GR-A pCi/L 32.8 28.6 14.6 - 37.5 A GR-B pCi/L 62.9 73.7 51.4 - 81.1 A U-Nat pCi/L 6.7 6.93 5.28 - 8.13 A H-3 pCi/L 17100 17200 15000 - 18900 A Sr-89 pCi/L 38.6 48.8 38.3 - 56.2 A Sr-90 pCi/L 27.1 26.5 19.2 - 30.9 A I-131 pCi/L 26.7 24.6 20.4 - 29.1 A September 2018 MRAD-29 AP GR-A pCi/sample 49.7 55.3 28.9 - 91.1 A AP GR-B pCi/sample 75.3 86.5 52.4 - 131 A October 2018 RAD-115 Water Ba-133 pCi/L 15.2 16.3 11.9 - 19.4 A Cs-134 pCi/L 85.9 93.0 76.4 - 102 A Cs-137 pCi/L 229 235 212 - 260 A Co-60 pCi/L 81.9 80.7 72.6 - 91.1 A Zn-65 pCi/L 348 336 302 - 392 A GR-A pCi/L 38.9 60.7 31.8 - 75.4 A GR-B pCi/L 36.5 41.8 27.9 - 49.2 A U-Nat pCi/L 17.48 20.9 16.8 - 23.4 A H-3 pCi/L 2790 2870 2410 - 3170 A I-131 pCi/L 26.9 27.2 22.6 - 32.0 A Sr-89 pCi/L 57.2 56.9 45.5 - 64.6 A Sr-90 pCi/L 36.8 31.4 22.9- 36.4 N(1)

(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 18-23 D-7

Intentionally left blank D-8

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 Air Particulate 3S2 SSES Backup Met. Tower 99.9 99.3 98.9 99.9 100 99 100 99.9 99.9

& Charcoal 12S1 West Building 99.9 100 99.9 99.9 100 100 100 99.1 99.7 Former Laydown Area, West of Confers 13S6 Lane 100 99.7 99.1 99.9 100 97 100 100 99.9 12E1 Berwick Hospital 100 100 99.9 100.0 100 98 99.1 100 100 6G1 Freeland Substation 100 100 99.9 99.9 100 90* 100 100 100 PPL System Facilities Center, Humboldt 8G1 Industrial Park 99.7 100 99.8 99.9 100 100 99.2 99.9 99.9 E of Confers Lane, 10S3 S of Towers Club - - - - - - 100 99.5 99.9 Transmission Line, 9B1 E of Route 11 - - - - - - 100 99.9 99.9 Drinking Water 12H2 Danville Water Company 100 100 100 100.0 100 100 100 100 100 Surface Water 2S7 Cooling Tower Blowdown Discharge Line 98.0 99.1 98.1 98.1 69** 100 99.1 100 100 6S6 River Water Intake Line 100 95.5 93.4 93.2 93 98 99.7 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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