ML20121A143

Transmittal of Annual Radioactive Environmental Operating Report for 2019

ML20121A143
Person / Time
Site:	Oyster Creek
Issue date:	04/30/2020
From:	Holtec Decommissioning International, Teledyne Brown Engineering Environmental Services
To:	Office of Nuclear Reactor Regulation
Shared Package
ML20121A141	List: ML20121A142 ML20121A143
References
HDI-20-OC-037
Download: ML20121A143 (162)

Text

Docket No: 50-219 OYSTER CREEK GENERATING STATION UNIT 1 Annual Radiological Environmental Operating Report 1 January through 31 December 2019 Prepared By Teledyne Brown Engineering Environmental Services Oyster Creek Generating Station Forked River, NJ 08731 April 2020 2019 OCGS AREOR

Intentionally left blank 2019 OCGS AREOR

Table of Contents Preface ................................................................................................................................. 1 I. Summary and Conclusions ............................................................................................ 12 II. Introduction ................................................................................................................... 14 A. Objectives of the REMP .................................................................................... 14 B. Implementation of the Objectives ...................................................................... 14 C. Discussion ......................................................................................................... 15 III. Program Description .................................................................................................... 17 A. Sample Collection ............................................................................................. 17 B. Sample Analysis ................................................................................................ 19 C. Data Interpretation ............................................................................................ 19 D. Program Exceptions .......................................................................................... 20 E. Program Changes ............................................................................................. 23 IV. Results and Discussion ............................................................................................... 24 A. Aquatic Environment ......................................................................................... 24 B. Atmospheric Environment ................................................................................. 28 C. Ambient Gamma Radiation ............................................................................... 31 D. Land Use Survey............................................................................................... 32 E. Summary of Results - Inter-laboratory Comparison Program .......................... 33 V. References ................................................................................................................... 37 VI. Errata ........................................................................................................................... 37 i

2019 OCGS AREOR

Appendices Appendix A Radiological Environmental Monitoring Report Summary Tables Table A-1 Radiological Environmental Monitoring Program Annual Summary for the Oyster Creek Generating Station, 2019 Appendix B Location Designation, Distance & Direction, and Sample Collection &

Analytical Methods Tables Table B-1 Location Designation and Identification System for the Oyster Creek Generating Station Table B-2 Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, Oyster Creek Generating Station, 2019 Table B-3 Radiological Environmental Monitoring Program - Summary of Sample Collection and Analytical Methods, Oyster Creek Generating Station, 2019 Figures Figure B-1 Locations of REMP Stations within a 1-mile radius of the Oyster Creek Generating Station Figure B-2 Locations of REMP Stations within a 1 to 5-mile radius of the Oyster Creek Generating Station Figure B-3 Locations of REMP Stations greater than 5 miles from the Oyster Creek Generating Station Appendix C Data Tables and Figures - Primary Laboratory Tables Table C-I.1 Concentrations of Tritium in Surface Water Samples Collected in the Vicinity of Oyster Creek Generating Station, 2019 Table C-I.2 Concentrations of Gamma Emitters in Surface Water Samples Collected in the Vicinity of Oyster Creek Generating Station, 2019 Table C-II.1 Concentrations of Tritium in Drinking Water Samples Collected in the Vicinity of Oyster Creek Generating Station, 2019 Table C-II.2 Concentrations of Gross Beta in Drinking Water Samples Collected in the Vicinity of Oyster Creek Generating Station, 2019 ii 2019 OCGS AREOR

Table C-II.3 Concentrations of I-131 in Drinking Water Samples Collected in the Vicinity of Oyster Creek Generating Station, 2019 Table C-II.4 Concentrations of Gamma Emitters in Drinking Water Samples Collected in the Vicinity of Oyster Creek Generating Station, 2019 Table C-III.1 Concentrations of Tritium in Groundwater Samples Collected in the Vicinity of Oyster Creek Generating Station, 2019 Table C-III.2 Concentrations of Gamma Emitters in Groundwater Samples Collected in the Vicinity of Oyster Creek Generating Station, 2019 Table C-IV.1 Concentrations of Gamma Emitters in Predator and Bottom Feeder (Fish) Samples Collected in the Vicinity of Oyster Creek Generating Station, 2019 Table C-IV.2 Concentrations of Gamma Emitters in Clam and Crab Samples Collected in the Vicinity of Oyster Creek Generating Station, 2019 Table C-V.1 Concentrations of Gamma Emitters in Sediment Samples Collected in the Vicinity of Oyster Creek Generating Station, 2019 Table C-VI.1 Concentrations of Gross Beta in Air Particulate Samples Collected in the Vicinity of Oyster Creek Generating Station, 2019 Table C-VI.2 Monthly and Yearly Mean Values of Gross Beta Concentrations in Air Particulate Samples Collected in the Vicinity of Oyster Creek Generating Station, 2019 Table C-VI.3 Concentrations of Strontium in Air Particulate Samples Collected in the Vicinity of Oyster Creek Generating Station, 2019 Table C-VI.4 Concentrations of Gamma Emitters in Air Particulate Samples Collected in the Vicinity of Oyster Creek Generating Station, 2019 Table C-VII.1 Concentrations of I-131 in Air Iodine Samples Collected in the Vicinity of Oyster Creek Generating Station, 2019 Table C-VIII.1 Concentrations of Strontium and Gamma Emitters in Vegetation Samples Collected in the Vicinity of Oyster Creek Generating Station, 2019 Table C-IX.1 Quarterly OSLD Results for Oyster Creek Generating Station, 2019 Table C-IX.2 Mean Quarterly OSLD Results for the Site Boundary, Intermediate, Special Interest, and Control Locations for Oyster Creek Generating Station, 2019 Table C-IX.3 Summary of the Ambient Dosimetry Program for Oyster Creek Generating Station, 2019 Figures Figure C-1 Mean Cobalt-60 Concentration in Clams Oyster Creek Generating Station, 1983 - 2019 iii 2019 OCGS AREOR

Figure C-2 Mean Cobalt-60 Concentration in Aquatic Sediment Oyster Creek Generating Station, 1984 - 2019 Figure C-3 Mean Cesium-137 Concentration in Aquatic Sediment Oyster Creek Generating Station, 1984 - 2019 Figure C-4 Mean Weekly Gross Beta Concentrations in Air Particulates Oyster Creek Generating Station, 2008 - 2019 Figure C-5 Mean Monthly Gross Beta Concentrations in Air Particulates Oyster Creek Generating Station, 1984 - 2019 Figure C-6 Mean Quarterly OSLD Gamma Dose Oyster Creek Generating Station, 2019 Appendix D Data Tables - QC Laboratory Tables Table D-I.1 Concentrations of Tritium in Surface Water Samples Collected in the Vicinity Of Oyster Creek Generating Station, 2019 Table D-I.2 Concentrations of Gamma Emitters in Surface Water Samples Collected in the Vicinity of Oyster Creek Generating Station, 2019 Table D-II.1 Concentrations of Tritium in Drinking Water Samples Collected in the Vicinity of Oyster Creek Generating Station, 2019 Table D-II.2 Concentrations of I-131 in Drinking Water Samples Collected in the Vicinity of Oyster Creek Generating Station, 2019 Table D-II.3 Concentrations of Gamma Emitters in Drinking Water Samples Collected in the Vicinity of Oyster Creek Generating Station, 2019 Table D-III.1 Concentrations of Tritium in Groundwater Samples Collected in the Vicinity of Oyster Creek Generating Station, 2019 Table D-III.2 Concentrations of Gamma Emitters in Groundwater Samples Collected in the Vicinity of Oyster Creek Generating Station, 2019 Table D-IV.1 Concentrations of Gamma Emitters in Clam Samples Collected in the Vicinity of Oyster Creek Generating Station, 2019 Table D-V.1 Concentrations of Gamma Emitters in Sediment Samples Collected in the Vicinity of Oyster Creek Generating Station, 2019 Table D-VI.1 Concentrations of Strontium and Gamma Emitters in Vegetation Samples Collected in the Vicinity of Oyster Creek Generating Station, 2019 iv 2019 OCGS AREOR

Appendix E Inter-Laboratory Comparison Program Tables Table E-1 Analytics Environmental Radioactivity Cross Check Program Teledyne Brown Engineering, 2019 Table E-2 DOEs Mixed Analyte Performance Evaluation Program (MAPEP)

Teledyne Brown Engineering, 2019 Table E-3 ERA Environmental Radioactivity Cross Check Program Teledyne Brown Engineering, 2019 Table E-4 Interlaboratory Comparison Crosscheck Program, New York Department of Health (ELAP), Environmental, Inc., 2019 Table E-5 DOEs Mixed Analyte Performance Evaluation Program (MAPEP),

Environmental, Inc., 2019 Table E-6 Interlaboratory Comparison Crosscheck Program, Environmental Resource Associates (ERA) RAD Study, Environmental, Inc., 2019 Appendix F Errata Data Appendix G Annual Radiological Groundwater Protection Program Report (ARGPPR) v 2019 OCGS AREOR

Preface The nuclear power industry uses terms and concepts that may be unfamiliar to all readers of this report. This section of the report is intended to help the reader better understand some of these terms and concepts. In this section, we will discuss radiation and exposure pathways. This section is intended only to give a basic understanding of these subjects to hopefully allow the reader to better understand the data provided within the report.

Every nuclear power station is required to submit two reports annually, the Annual Radioactive Effluents Release Report (ARERR) and the Annual Radiological Environmental Operating Report (AREOR). The following information is provided in both reports for Oyster Creek Generating Station.

Understanding Radiation Radiation is simply defined as the process of emitting radiant energy in the form of waves or particles. Radiation can be categorized as ionizing or non-ionizing radiation.

If the radiation has enough energy to displace electrons from an atom it is termed ionizing radiation. Typically you will see a warning sign where there is a potential to be exposed to man-made ionizing radiation. These signs normally have the trefoil symbol on a yellow background.

Example Radiological warning signs People do not always recognize non-ionizing radiation as a form of radiation, such as light, heat given off from a stove, radiowaves and microwaves. In our report we focus on the ionizing radiation that is produced at a nuclear power plant though it is important to note that ionizing radiation comes from many sources. In fact, the amount of ionizing 1

2019 OCGS AREOR

radiation an average person is exposed to due to operation of a nuclear power plant is a very small fraction of the total ionizing radiation they will be exposed to in their lifetime and will be discussed later.

From this point forward we will only be discussing ionizing radiation but we will just use the term radiation.

Since this report discusses radiation in different forms and different pathways we first need to understand where the radiation comes from that we report. Radiation comes from atoms. So, what are atoms and how does radiation come from atoms?

You may have seen a Periodic Table of the Elements This table lists all the elements found on earth. An atom is the smallest part of an element that maintains the characteristics of that element. An atom is made up of three parts, protons, neutrons and electrons.

2 2019 OCGS AREOR

The number of protons in an atom determines the element. A hydrogen atom will always have one proton while an oxygen atom will always have eight protons. The protons are clustered with the neutrons at the center of the atom and this is called the nucleus. Orbiting around the nucleus are the relatively small electrons. Neutrons do not have an electrical charge, protons have a positive charge while electrons have a negative charge. In an electrically neutral atom, the negative and positive charges are balanced. Atoms of the same element that have a different number of neutrons in their nucleus are called isotopes.

Isotopes are atoms that have the same number of protons but different number of neutrons. They all have the same chemical properties and many isotopes are nonradioactive or stable while other isotopes may be unstable and are radioactive.

Radioactive isotopes can be called a radionuclide, a radioisotope or simply called a radioactive atom. A radionuclide usually contains an excess amount of energy in the nucleus usually due to a deficit or excess of neutrons in the nucleus.

There are two basic ways radionuclides are produced at a nuclear power plant. The first way is a direct result of the fission process and the radionuclides created through this process are termed fission products. Fission occurs when a very large atom, such as U-235 (Uranium-235) and Pu-239 (Plutonium-239), absorbs a neutron into its nucleus making the atom unstable. In this instance the atom can actually split into smaller atoms, this splitting of the atom is called fission. When fission occurs there is also a large amount of energy released from the atom in the form of heat which is what is used to produce the steam that will spin the turbines to produce electricity at a nuclear power plant.

3 2019 OCGS AREOR

The second way a radionuclide is produced at a nuclear power plant is through a process called activation and the radionuclides produced in this method are termed activation products. Water passes through the core where the fission process is occurring. This water is used to both produce the steam to turn the turbines and to cool the reactor. Though the water passing through the core is considered to be very pure water, there is always some other material within the water. This material typically comes from the material used in the plants construction. As the water passes through the core, the material is exposed to the fission process and the radiation within the core can react with the material causing it to become unstable, creating a radionuclide. The atoms in the water itself can become activated and create radionuclides.

Over time, radioactive atoms will reach a stable state and no longer be radioactive. To do this they must release the excess energy. The release of excess energy can be in different forms and is called radioactive decay and the energy released is called radiation. The time it takes for a radionuclide to become stable is measured in units called half-lives. A half-life is the amount of time it takes for half of the original radioactivity to decay. Each radionuclide has a specific half-life. Some half-lives can be very long and are measured in years while others may be very short and are measured in seconds.

4 2019 OCGS AREOR

In this report, you will see radionuclides listed such as K-40 (potassium-40) and Co-60 (cobalt-60). The letter(s) represents the element and the number represents the specific isotope of that element and is the number of nuetrons in the nucleus of that radionuclide. You may hear the term naturally occurring radionuclide which refers to radionuclides that naturally occur in nature such as K-40. There are man-made radionuclides such as Co-60 that we are concerned with since these man-made radionuclides result as a by-product when generating electricity at a nuclear power plant. There are other ways man-made radionuclides are produced, such as detonating nuclear weapons, and this is important to note since nuclear weapons testing deposited these man-made radionuclides into the environment and some are still present today.

There is a discussion in the AREOR for the radionculides Cs-137, Sr-89 and Sr-90.

The reason we only see some of the radionuclides today is due to the fact that some of the radionuclides released into the environment had relatively short half-lives and all the atoms have decayed to a stable state while other radionuclides have relatively long half-lives and will be measurable in the environment for years to come.

5 2019 OCGS AREOR

Sources of Radiation People are exposed to radiation every day of their lives and have been since the dawn of mankind. Some of this radiation is naturally occurring while some is man-made.

There are many factors that will determine the amount of radiation an individual will be exposed to such as where you live, medical treatments, etc. Below are examples of some of the typical sources of radiation an individual is exposed to in a year.

Adapted with permission of the National Council on Radiation Protection and Measurements, http://NCRPonline.org As you can see from the graph, the largest natural source of radiation is due to Radon.

That is because essentially all air contains Radon. Cosmic and Internal make up the next largest natural sources of radiation. Cosmic radiation comes from the sun and stars and there are multiple factors which can impact the amount of cosmic radiation you are exposed to such as the elevation at which you live and the amount of air travel you take a year. The internal natural source of radiation mainly comes from two sources. Technically, all organic material is slightly radioactive due to C-14 (Carbon-14), including humans and the food we eat. C-14 makes up a percentage of the carbon in all organic material. Another contributor to the internal natural source is K-40 (Potassium-40). Potassium is present in many of the foods we eat, such as brazil nuts, bananas, carrots and red meat. The smallest natural source listed is terrestrial. Soil and rocks contain radioactive materials such as Radium and Uranium. The amount of terrestrial radiation you are exposed to depends on where you live. The map below shows terrestrial exposure levels across the United States. The radiation released from 6

2019 OCGS AREOR

nuclear power plants is included in the Industrial and Occupational slice and is listed as

<0.1%.

Exposure Pathways Radiological exposure pathways define the methods by which people may become exposed to radioactive material. The major pathways of concern are those which could cause the highest calculated radiation dose. These projected pathways are determined from the type and amount of radioactive material released into the environment and how the environment is used. The way radioactive material is transported in the environment includes consideration of physical factors, such as the hydrological (water) and meteorological (weather) characteristics of the area. An annual average of the water flow, wind speed, and wind direction are used to evaluate how the radionuclides will be distributed in an area for gaseous or liquid releases. An important factor in evaluating the exposure pathways is the use of the environment. Many factors are considered such as dietary intake of residents, recreational use of the area, and the locations of homes and farms in the area.

The external and internal exposure pathways considered are shown in Figure 2.1. The release of radioactive gaseous effluents involves pathways such as external whole-body exposure, deposition of radioactive material on plants, deposition on soil, 7

2019 OCGS AREOR

inhalation by animals destined for human consumption, and inhalation by humans.

The release of radioactive material in liquid effluents involves pathways such as drinking water, fish, and direct exposure from the water at the shoreline while swimming.

Although radionuclides can reach humans by many different pathways, some result in more dose than others. The critical pathway is the exposure route that will provide, for a specific radionuclide, the greatest dose to a population, or to a specific group of the population called the critical group. The critical group may vary depending on the radionuclides involved, the age and diet of the group, or other cultural factors. The dose may be delivered to the whole body or to a specific organ. The organ receiving the greatest fraction of the dose is called the critical organ.

Figure 2.1 External and Internal Exposure Pathways This simple diagram demonstrates some potential exposure pathways from Oyster Creek Generating Station.

8 2019 OCGS AREOR

Radiation Risk U.S. radiation protection standards are based on the premise that any radiation exposure carries some risk. There is a risk whether the radiation exposure is due to man-made sources or natural sources. There have been many studies performed trying to determine the level of risk. The following graph is an example of one study that tries to relate risk from many different factors. This graph represents risk as Days of Lost Life Expectancy. All the categories are averaged over the entire population except Male Smokers, Female Smokers and individuals that are overweight. Those risks are only for people that fall into those categories. The category for Nuclear Power is a government estimate based on all radioactivity releases from nuclear power, including accidents and wastes.

Adapted from the article by Bernard L. Cohen, Ph.D. in the Journal of American Physicians and Surgeons Volume 8 Number 2 Summer 2003.

The full article can be found at http://www.jpands.org/vol8no2/cohen.pdf 9

2019 OCGS AREOR

Annual Reports All nuclear power plants are required to perform sampling of both the potential release paths from the plant and the potential exposure pathways in the environment. The results of this sampling are required to be reported annually to the Nuclear Regulatory Commission (NRC) and made available to the public. There are two reports generated annually, the Annual Radioactive Effluents Release Report (ARERR) and the Annual Radiological Environmental Operating Report (AREOR). The ARERR summarizes all of the effluents released from the plant and quantifies the doses to the public from these effluents. The AREOR summarizes the results of the samples obtained in the environment looking at all the potential exposure pathways by sampling different media such as air, vegetation, direct radiation, etc. These two reports are related in that the results should be aligned. The AREOR should validate that the effluent program is accurate. The ARERR and AREOR together ensure Nuclear Power Plants are operating in a manner that adequately protects the public.

In the reports, there are four different but interrelated units for measuring radioactivity, exposure, absorbed dose, and dose equivalent. Together, they are used to properly capture both the amount of radiation and its effects on humans.

• Radioactivity refers to the amount of ionizing radiation released by a material.

The units of measure for radioactivity used within the AREOR and ARERR are the curie (Ci). Small fractions of the Ci often have a prefix, such as Ci that means 1/1,000,000. That means there are 1,000,000 Ci in one Ci.

• Exposure describes the amount of radiation traveling through the air. The units of measure for exposure used within the AREOR and ARERR are the roentgen (R). Traditionally direct radiation monitors placed around the site are measured in milliroentgen (mR), 1/1,000 of one R.

• Absorbed dose describes the amount of radiation absorbed by an object or person. The units of measure for absorbed dose used within the AREOR and ARERR are the rad. Noble gas air doses are reported by the site are measured in millirad (mrad), 1/1,000 of one rad.

• Dose equivalent (or effective dose) combines the amount of radiation absorbed and the health effects of that type of radiation. The units used within the AREOR and ARERR are the roentgen equivalent man (rem). Regulations require doses to the whole body, specific organ, and direct radiation to be reported in millirem (mrem), 1/1,000 of one rem.

10 2019 OCGS AREOR

Typically releases from nuclear power plants are so low that the samples taken in the environment are below the detection levels required to be met by all nuclear power plants. There are some radionuclides identified in the environment during the routine sampling but this is typically background radiation from nuclear weapons testing and events such as Chernobyl and these radionuclides are discussed in the AREOR.

Each report lists the types of samples that are collected and the analyses performed.

Different types of media may be used at one sample location looking for specific radionuclides. For example, at our gaseous effluent release points we use different media to collect samples for particulates, iodines, noble gases and tritium. There are also examples where a sample collected on one media is analyzed differently depending on the radionuclide for which the sample is being analyzed.

These annual reports, and much more information related to nuclear power, are available on the NRC website at www.nrc.gov.

11 2019 OCGS AREOR

I. Summary and Conclusions On July 1st 2019, ownership of the Oyster Creek Nuclear Power Station and transfer of the station and decommissioning license from Exelon Generation Company, LLC to Oyster Creek Environmental Protection, LLC (OCEP) as the licensed owner and Holtec Decommissioning International, LLC (HDI) as the licensed operator, was completed. Exelon had determined that transitioning operational nuclear plants to decommissioning nuclear plants targeted for permanent shutdown was not aligned with its core objectives and actively sought buyers who would assume ownership and complete decommissioning and license termination.

This report on the Radiological Environmental Monitoring Program (REMP) conducted for the Oyster Creek Generating Station (OCGS) by Holtec Decommissioning International, LLC (HDI) covers the period 01 January 2019 through 31 December 2019. During that time period, a total of 1,778 analyses were performed on 1,460 samples. In assessing all the data gathered for this report and comparing these results with historical data, it was concluded that the operation of OCGS had no adverse radiological impact on the environment.

REMP-designated surface water samples were analyzed for concentrations of tritium and gamma-emitting nuclides. No tritium, fission or activation products were detected in any of the surface water samples collected as part of the Radiological Environmental Monitoring Program during 2019.

REMP-designated drinking water samples were analyzed for concentrations of gross beta, tritium, Iodine-131 (I-131), and gamma-emitting nuclides. The preoperational environmental monitoring program did not include analysis of drinking water for gross beta. No tritium, I-131, or fission or activation products were detected in any of the drinking water samples collected.

REMP-designated groundwater samples were analyzed for concentrations of tritium and gamma-emitting nuclides. No tritium and no fission or activation products were detected in REMP groundwater samples.

Fish (predator and bottom feeder), clams, crabs, and sediment samples were analyzed for concentrations of gamma-emitting nuclides. No OCGS-produced fission or activation products were detected in fish, clams, or crabs. Cesium-137 (Cs-137) was not detected in any sediment samples.

Air particulate samples were analyzed for concentrations of gross beta, gamma-emitting nuclides, Strontium-89 (Sr-89), and Strontium-90 (Sr-90). Gross beta and cosmogenic Beryllium-7 (Be-7) were detected at levels consistent with those detected in previous years. No fission or activation products were detected.

Sr-89 and Sr-90 analyses were performed on quarterly composites of air particulate samples. All Sr-89 and Sr-90 results were below the minimum detectable activity.

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

12 2019 OCGS AREOR

Vegetation samples were analyzed for gamma-emitting nuclides, Sr-89, and Sr-90. Concentrations of naturally occurring Potassium-40 (K-40) were consistent with those detected in previous years. No fission or activation products were detected. All Sr-89 results were below the minimum detectable activity. Sr-90 activity was at levels consistent with those detected in previous years at both control and indicator stations, and can be attributed to historical nuclear weapons testing and the Chernobyl accident.

Environmental gamma radiation measurements were performed quarterly using Optically Stimulated Luminescence Dosimeters (OSLD). Beginning in calendar year 2012, Exelon (the previous plant owner) began using OSLDs and discontinued the use of Thermoluminescent Dosimetry (TLD). There were two main reasons for this change. First, OSLDs have minimal fade over a quarterly time period. Fade is where the dose on the dosimeter drifts lower over time.

Second, OSLDs may be re-read if necessary. TLDs are reset to zero after they are read. Levels detected were consistent with those observed in previous years.

The maximum dose to any member of the public attributable to radioactive effluents and direct radiation from the OCGS was less than the 25 mRem/year limit established by the United States Environmental Protection Agency (EPA).

13 2019 OCGS AREOR

II. Introduction The Oyster Creek Generating Station (OCGS) is a non-operational single unit nuclear power plant owned and operated by HDI. OCGS is located on the Atlantic Coastal Plain Physiographic Province in Ocean County, New Jersey, about 60 miles south of Newark, 9 miles south of Toms River, and 35 miles north of Atlantic City. It lies approximately 2 miles inland from the Barnegat Bay. The property, covering approximately 781 acres, is situated partly in Lacey Township and, to a lesser extent, in Ocean Township. Access is provided by U.S. Route 9, passing through the ~150-acre site and separating a 637-acre eastern portion from the balance of the property west of the highway. The station is about 1/4 mile west of the highway and 11/4 miles east of the Garden State Parkway. The site property extends about 21/2 miles inland from the bay; the maximum width in the north-south direction is almost 1 mile. The site location is part of the New Jersey shore area with its relatively flat topography and extensive freshwater and saltwater marshlands. The South Branch of Forked River runs across the northern side of the site and Oyster Creek partly borders the southern side.

A preoperational Radiological Environmental Monitoring Program (REMP) for OCGS was established in 1966, and continued prior to the plant becoming operational in 1969. This report covers those analyses performed by Teledyne Brown Engineering (TBE), Landauer and Environmental Inc. (Midwest Labs) on samples collected during the period 01 January 2019 through 31 December 2019.

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

1. Provide data on measurable levels of radiation and radioactive materials in and beyond the site environs

2. Evaluate the relationship between quantities of radioactive material released from the plant and resultant radiation doses to individuals from principal pathways of exposure

3. Validate the effluent computer model that predicts radioactive material concentrations at populated off-site locations

4. Fulfill the obligations of the radiological surveillance sections of Oyster Creeks Offsite Dose Calculation Manual (ODCM)

B. Implementation of the Objectives The implementation of the objectives is accomplished by:

1. Identifying significant exposure pathways 14 2019 OCGS AREOR

2. Establishing baseline radiological data for media within those pathways

3. Continuously monitoring those media before, during and after terminating Station operation to assess Station radiological effects (if any) on the public, plant workers and the environment C. Discussion

1. General Program The Radiological Environmental Monitoring Program (REMP) was established in 1966, before the plant became operational. This preoperational surveillance program was established to describe and quantify the radioactivity, and its variability, in the area prior to the operation of OCGS. After OCGS became operational in 1969, the operational surveillance program continued to measure radiation and radioactivity in the surrounding areas.

A variety of environmental samples are collected as part of the REMP at OCGS. The selection of sample types is based on the established pathways for the transfer of radionuclides through the environment to humans. The selection of sampling locations is based on sample availability, local meteorological and hydrological characteristics, local population characteristics, and land usage in the area of interest. The selection of sampling frequencies for the various environmental media is based on the radionuclides of interest, their respective half-lives, and their behavior in both the biological and physical environment.

2. Preoperational Surveillance Program The federal government requires nuclear facilities to conduct radiological environmental monitoring prior to constructing the facility. This preoperational surveillance program is aimed at collecting the data needed to identify pathways, including selection of the radioisotope and sample media combinations to be included in the environmental surveillance program conducted after facility operation begins.

Radiochemical analyses performed on the environmental samples should include not only those nuclides expected to be released during facility operation, but should also include typical radionuclides from nuclear weapons testing and natural background radioactivity. All environmental media with a potential to be affected by facility operation as well as those media directly in the major pathways, should be sampled on at least an annual basis during the preoperational phase of the environmental surveillance program.

The preoperational surveillance design, including nuclide/media combinations, sampling frequencies and locations, collection techniques, 15 2019 OCGS AREOR

and radioanalyses performed, should be carefully considered and incorporated in the design of the operational surveillance program. In this manner, data can be compared in a variety of ways (for example, from year to year, location to location, etc.) in order to detect any radiological impact the facility has on the surrounding environment. Data collection during the preoperational phase should be planned to provide a comprehensive database for evaluating any future changes in the environment surrounding the nuclear facility.

OCGS began its preoperational environmental surveillance program three years before the plant began operating in 1969. Data accumulated during those early years provide an extensive database from which environmental monitoring personnel are able to identify trends in the radiological characteristics of the local environment. The environmental surveillance program at OCGS will continue after the plant has reached the end of its economically useful life and decommissioning has begun.

3. Consideration of Plant Effluents Effluents are strictly monitored to ensure that radioactivity released to the environment is as low as reasonably achievable and does not exceed regulatory limits. Effluent control includes the operation of monitoring systems, in-plant and environmental sampling and analyses programs, quality assurance programs for effluent and environmental programs, and procedures covering all aspects of effluent and environmental monitoring.

Both radiological environmental and effluent monitoring indicate that the operation of OCGS does not result in significant radiation exposure of the people or the environment surrounding OCGS and is well below the applicable levels set by the Nuclear Regulatory Commission (NRC) and the EPA.

Environmental sampling of airborne iodine and particulates showed no radioactivity attributable to the operation of OCGS.

16 2019 OCGS AREOR

III. Program Description A. Sample Collection Samples for the OCGS REMP were collected for HDI by on-site personnel and Normandeau Associates, Incorporated. This section describes the general collection methods used to obtain environmental samples for the OCGS REMP in 2019. Sample locations and descriptions can be found in Tables B-1 and B-2, and Figures B-1, B-2, and B-3, Appendix B. The collection procedures are listed in Table B-3.

Aquatic Environment The aquatic environment was evaluated by performing radiological analyses on samples of surface water, drinking water, groundwater, fish, clams, crabs, and sediment. One gallon water samples were collected monthly from two surface locations (33 and 94), semiannually at two surface water locations (23 and 24), monthly from five drinking water wells (1N, 1S, 37, 38, and 114) and quarterly from 2 groundwater stations (MW-24-3A and W-3C). Control locations were 94 and 37. All samples were collected in plastic bottles, which were rinsed at least twice with source water prior to collection. Fish samples comprising the flesh of two groups, bottom feeder and predator, were collected semiannually at three locations (33, 93 and 94 [control]). Clams were collected semiannually from three locations (23, 24, and 94 [control]).

Two annual crab samples were collected from two locations (33 and 93).

Sediment samples were collected at four locations semiannually (23, 24, 33, and 94 [control]).

Atmospheric Environment The atmospheric environment was evaluated by performing radiological analyses on samples of air particulate and airborne iodine. Airborne iodine and particulate samples were collected and analyzed weekly at eight locations (C, 3, 20, 66, 71, 72, 73, and 111). The control location was C. Airborne iodine and particulate samples were obtained at each location, using a vacuum pump with charcoal and glass fiber filters attached. The pumps were run continuously and sampled air at the rate of approximately one cubic foot per minute. The filters were replaced weekly and sent to the laboratory for analysis.

Terrestrial Environment The terrestrial environment was evaluated by performing radiological analyses on samples of garden vegetation. No commercial dairy operations and no dairy animals producing milk for human consumption are located within a 5-mile radius of the plant. Therefore, vegetation samples were collected in lieu of milk. Vegetation samples were collected, when available, at four locations 17 2019 OCGS AREOR

(35, 36, 66 and 115). Station 36 is the control location as it is 24 miles northwest of the plant in the lowest X/Q sector, beyond any influence of the plant when the plant was operating, and while it is permanently shut down for decommissioning. All samples were collected in 18 x 24 new unused plastic bags and shipped promptly to the laboratory.

Ambient Gamma Radiation Direct radiation measurements were made using Al2O3:C Optically Stimulated Luminescence Dosimetry (OSLD). Exelon Nuclear (the previous plant owner) changed the dosimetry used for environmental monitoring. Beginning in calendar year 2012, Exelon began using OSLDs and discontinued the use of Thermoluminescent Dosimetry (TLD). There were two main reasons for this change. First, OSLDs are subject to minimal fade. Fade is where the dose on the dosimeter drifts lower over time. Second, OSLDs may be re-read if necessary. TLDs are reset to zero after they are read. The OSLDs were placed on and around the OCGS site and were categorized as follows:

An inner ring consisting of 19 locations (1, T1, 51, 52, 53, 54, 55, 56, 57, 58, 59, 61, 62, 63, 64, 65, 66, 112, and 113) near the site boundary.

An outer ring consisting of 31 locations (4, 5, 6, 8, 9, 22, 46, 47, 48, 68, 73, 74, 75, 78, 79, 82, 84, 85, 86, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 109, and 110) extending to approximately 5 miles from the site designed to measure possible exposures to close-in population.

Special interest stations consisting of 9 locations (3, 11, 71, 72, 81, 88, 89, 90, and 92) representing special interest areas such as population centers, state parks, etc.

Background (Control) stations consisting of two locations (C and 14) greater than 20 miles distant from the site.

Indicator OSLDs were placed systematically, with at least one station in each of 16 meteorological compass sectors in the general area of the site boundary. OSLDs were also placed in each meteorological sector in the 1 to 5 mile range, where reasonable highway access would permit, in areas of public interest and population centers. Background locations were located greater than twenty miles distant from the OCGS and generally in an upwind direction from the OCGS.

Two OSLDs were placed at each location approximately three to eight feet above ground level. The OSLDs were exchanged quarterly and sent to Landauer for analysis.

18 2019 OCGS AREOR

B. Sample Analysis This section describes the general analytical methodologies used by TBE and Environmental Inc. (Midwest Labs) to analyze the environmental samples for radioactivity for the OCGS REMP in 2019. The analytical procedures used by the laboratories are listed in Table B-3.

In order to achieve the stated objectives, the current program includes the following analyses:

1. Concentrations of beta emitters in air particulates and drinking water

2. Concentrations of gamma emitters in surface, drinking water, groundwater, fish, clams, crabs, sediment, air particulates and vegetation

3. Concentrations of tritium in REMP-designated surface, drinking water and groundwater

4. Concentrations of I-131 in air iodine cartridges and drinking water

5. Concentrations of strontium in air particulates and vegetation

6. Ambient gamma radiation levels at various locations around the OCGS C. Data Interpretation For trending purposes, the radiological and direct radiation data collected during 2019 were compared with data from past years. The results of environmental sampling show that radioactivity levels have not increased from the background radioactivity detected prior to the operation of OCGS. The operation of OCGS continues to have no measurable radiological impact upon the environment.

Several factors were important in the interpretation of the data:

1. Lower Limit of Detection and Minimum Detectable Concentration The lower limit of detection (LLD) is defined as the smallest concentration of radioactive material in a sample that would yield a net count (above background) that would be detected with only a 5% probability of falsely concluding that a blank observation represents a "real" signal. The LLD is intended as a before the fact estimate of a system (including instrumentation, procedure and sample type) and not as an after the fact criterion for the presence of activity. All analyses were designed to achieve the required OCGS detection capabilities for environmental sample analysis.

19 2019 OCGS AREOR

The minimum detectable concentration (MDC) is defined above with the exception that the measurement is an after the fact estimate of the presence of activity.

2. Net Activity Calculation and Reporting of Results Net activity for a sample was calculated by subtracting background activity from the sample activity. Since the REMP measures extremely small changes in radioactivity in the environment, background variations may result in sample activity being lower than the background activity, which results in a negative number. A less than MDC was reported in all cases where positive activity was not detected.

Gamma spectroscopy results for each type of sample were grouped as follows:

For surface, drinking water, and groundwater - 12 nuclides: Mn-54, Co-58, Fe-59, Co-60, Zn-65, Zr-95, Nb-95, I-131, Cs-134, Cs-137, Ba-140, and La-140 were reported For fish - eight nuclides: K-40, Mn-54, Co-58, Fe-59, Co-60, Zn-65, Cs-134, and Cs-137 were reported For clams - eight nuclides: K-40, Mn-54, Co-58, Fe-59, Co-60, Zn-65, Cs-134, and Cs-137 were reported For crabs - eight nuclides: K-40, Mn-54, Co-58, Fe-59, Co-60, Zn-65, Cs-134, and Cs-137 were reported For sediment - nine nuclides: Be-7, K-40, Mn-54, Co-58, Co-60, Cs-134, Cs-137, Ra-226, and Th-228 were reported For air particulate - six nuclides: Be-7, Mn-54, Co-58, Co-60, Cs-134, and Cs-137 were reported For air iodine cartridges - one nuclide: I-131 was reported For vegetation - seven nuclides: Be-7, K-40, I-131, Cs-134, Cs-137, Ba-140, and La-140 were reported Means and standard deviations of the results were calculated. The standard deviations represent the variability of measured results for different samples rather than single analysis uncertainty.

D. Program Exceptions For 2019, the OCGS REMP had a sample recovery rate in excess of 97%.

Exceptions are listed below:

20 2019 OCGS AREOR

Environmental Dosimetry

1. July, 2019: Station 6 (Lane Place, Lacey) - No 2nd quarter results due to both dosimeters missing - reason unknown. 3rd quarter Station 6 dosimeters placed in holder.

2. October, 2019: Station 5 (GSP Rest Area) - No 3rd quarter results due to dosimeters and holder being removed (construction at the rest area).

Dosimeters could not be located. New dosimeter holder & dosimeters were installed on 10/29/19 at the rest area.

Air

1. 01/09/19 & 01/16/19: Station 20 - No valid samples for Weeks 1 & 2 due to no power to station. Sampler restarted on 1/14, but not enough run time to constitute a valid sample. Connector fitting on pump and timer replaced on 01/14/19. (AR 04209785)

2. 02/14/19: Station 73 - No valid sample for Week 6 due to pump not running at time of collection (timer running normally). Pump replaced 02/15/19.

3. 04/24/19: Station C - No valid sample for Week 16 due to pump not running (but timer was) at time of collection. As per procedure, sample not valid and not sent to lab; replaced pump the same day.

4. 05/29/19: Station 71 - Main power breaker switch had been turned off.

Pump ran long enough to constitute a valid sample; reset breaker switch.

5. 06/12/19: Station 72 - Shorter run time than expected - samples are valid; will monitor timer.

6. 06/19/19: Station C - No valid sample for Week 24 due to pump not running (but timer was) at time of collection. As per procedure, sample not valid and not sent to lab; pump replaced 06/21/19.

7. 09/18/19: Station 20 - No valid sample for Week 37 due to a tripped breaker. Pump did not run long enough to constitute a valid sample; reset breaker and replaced timer on 10/1719.

8. 01/20/20: All Stations - No iodine results for Week 52 of 2019 due to lack of replacement cartridges. Normandeau had been told that the number of air stations would be reduced in 2020 and did not resupply cartridges. CDI Task Manager was informed and Normandeau was 21 2019 OCGS AREOR

instructed to keep AI cartridges in place for a 2-week run. Additional iodine cartridges ordered until air station changes take effect. No iodine was detected in effluents released from the plant or in the field in 2019.

Drinking Water Note: Stations 1S and 1N are on-site drinking water wells. Typically, only one well is in service at a time. They are only listed as deviations when there is not a sample for every week of the composite period.

1. 2019: Station 1S was not operational for the entire year.

2. March, 2019: Station 38 composite 3 of 4 weeks. 3rd week of the month treatment plant offline for maintenance.

3. April, 2019: Station 114 was operational 3 of 5 weeks. Pump out of service during this period.

4. May, 2019: Station 114 taken out of service permanently.

Fish

1. Spring & Fall, 2019: Control Station 94 - no fish for spring & fall sampling. Local fisherman that had supplied sample fish for many years had passed away. Normandeau fishing efforts unsuccessful.

Hired a charter boat in June to fish, but still no success. Asked other local fishermen - no fish. (Fall note - Likely to use different methods going forward)

2. Spring, 2019: Stations 93 & 33 collected only 2 species, each likely due to lack of warm water in canal from the plant not producing.

3. Fall, 2019: Station 93 - no fish for fall sampling likely due to the lack of warm water in discharge canal. Fished discharge area with rod and reel for approximately 20 man-hours but no fish.

Vegetation

1. June - October, 2019: Station 66 - No crops produced for entire growing season. Fertilizer & top soil added but still no production.

Garden sits in low spot and is often too wet for plants. Garden is no longer a tech spec location.

2. September - October, 2019: Station 15 - Only 2 of 3 species of 22 2019 OCGS AREOR

vegetation were collected due to lateness of growing season.

Program exceptions are tracked by Oyster Creek staff and Normandeau and investigated to understand the causes of the program exception. Sampling and maintenance errors are reviewed with the personnel involved to prevent recurrence.

The overall sample recovery rate indicates that the appropriate procedures and equipment are in place to assure reliable program implementation.

E. Program Changes To address the accumulated water inventory at Oyster Creek following permanent plant shutdown (with the transition to decommissioning), permitted batch processing and discharge of treated water was re-introduced with revision 9 to the ODCM. This over boarding of treated water using a permitted process implements controls specified in NUREG 1302. Aquatic sampling was evaluated and increased where warranted to assure pathways to man are monitored.

23 2019 OCGS AREOR

IV. Results and Discussion A. Aquatic Environment

1. Surface Water Samples were taken via grab sample methodology at two locations (33 and 94) on a monthly schedule. In addition, grab samples were collected semi-annually at two locations (23 and 24). Of these locations 23, 24, and 33, located downstream, could be affected by Oyster Creeks effluent releases. The following analyses were performed:

Tritium Surface water sampling began in 1966, and the samples were analyzed for tritium as well as other radioactivity. During this preoperational program, tritium was detected at an average concentration of 1,050 pCi/L.

At that time, counting instrumentation was not as sensitive as it now, and the minimum detectable concentration was 1,000 pCi/L versus 200 pCi/L used today. By comparing the 2019 sampling results to the decay-corrected average preoperational concentration reported in the 2007 Annual Radiological Environmental Operating Report (111 pCi/L), it can be seen that the inventory of tritium in the environment is due to fallout from past atmospheric nuclear weapons testing, and is decreasing with time.

Samples from all locations were analyzed for tritium activity. No tritium activity was detected. (Table C-I.1, Appendix C)

Gamma Spectrometry Samples from all locations were analyzed for gamma-emitting nuclides.

All nuclides were less than the MDC. (Table C-I.2, Appendix C)

2. Drinking water Monthly samples were composited from monthly grab samples from six drinking water wells (1N, 1S, 37, 38, and 114). Station 1, because it is located on the OCGS site, could potentially be affected by radioactive releases from the plant. Station 1 was split into two separate locations, 1N and 1S. Station 38, the Ocean Township Municipal Utility Authority Well, could potentially be affected by effluent releases from the OCGS.

Given its distance from the facility (1.6 miles) and depth (approximately 360 feet), however, the probability of any OCGS-related impacts is very small. Stations 37 and 39, Lacey Township Municipal Utility Authority wells, are not likely to be impacted by effluents from the OCGS. These wells are located generally up-gradient of the regional groundwater flow direction (southeast). In addition, because of their depth (> 200 feet) and 24 2019 OCGS AREOR

distance from the site (2.2 and 3.5 miles respectively), they are unlikely to be affected by OCGS operations. The following analyses were performed:

Tritium Monthly samples from all locations were analyzed for tritium activity. No tritium activity was detected. Drinking water was sampled during the preoperational program and throughout the almost 50 years of the plants operational program. Tritium sampling results during the preoperational years, yielded results all less than the minimum detectable concentration of 1000 pCi/L. The 2019 results are all less than the current MDC of 200 pCi/L. (Table C-II.1, Appendix C)

Gross Beta Monthly samples from all locations were analyzed for concentrations of total gross beta activity. Gross beta was detected in 27 of 40 samples and is attributed to natural sources and fallout residual from previous bomb testing residual fallout. The values ranged from 1.6 to 11.8 pCi/L.

(Table C-II.2, Appendix C)

The investigation level for gross beta in water is 15 pCi/L. Drinking water sample 1N result for gross beta exceeded the investigation level beginning in January 2012.

The initial result for gross beta was 15.1 pCi/L in 2012. This issue was entered into the Corrective Action Program (CAP) and an investigation initiated. The 1N water sample was analyzed for known beta-emitters Sr-89, Sr-90, Iron-55 (Fe-55) and Nickel-63 (Ni-63). These analyses results were all <MDC. It was also identified that the 1N well treatment system was upgraded the previous month and a potassium chloride softener system was added as part of the upgrade. Samples were obtained pre-and post-treatment. The pre-treatment result for gross beta was 3.6 pCi/L, which is a value that has been seen previously in drinking water samples. The post-treatment sample result for gross beta was 22.2 pCi/L.

Based on the fact that there were no typical plant-produced beta-emitters detected and that natural potassium is a known beta- emitter, along with the results of the pre- and post-sampling, the gross beta values obtained for 1N can be attributed to the addition of the water softener system installed during the system upgrade in December of 2011.

Iodine Monthly samples from all locations were analyzed for I-131 by the low level method to detect down to 1.0 pCi/L. All results were less than the 25 2019 OCGS AREOR

MDC. (Table C-II.3, Appendix C)

Gamma Spectrometry Samples from all locations were analyzed for gamma-emitting nuclides.

All nuclides were less than the MDC. (Table C-II.4, Appendix C)

3. Groundwater The following analyses were performed:

Tritium Samples from all locations were analyzed for tritium activity. No tritium activity was detected. (Table C-III.1, Appendix C)

Gamma Spectrometry Samples from all locations were analyzed for gamma-emitting nuclides (Table C-III.2, Appendix C). All nuclides were less than the MDC.

4. Fish Fish samples comprised of bottom feeder (American eel, winter flounder, tautaug, summer flounder) and predator (bluefish, striped bass, white perch) were collected at three locations (33, 93, and 94) semiannually.

Locations 93 and 33 could be affected by Oyster Creeks effluent releases. The following analysis was performed:

Gamma Spectrometry The edible portions of fish samples from three locations were analyzed for gamma-emitting nuclides. Naturally occurring K-40 was found at all stations and ranged from 2,467 to 5,932 pCi/kg wet and was consistent with levels detected in previous years. No fission or activation products were found. (Table C-IV.1, Appendix C)

No fish were sampled during the preoperational sampling program for OCGS.

5. Clams and Crabs Clams were collected at three locations (23, 24, and 94) semiannually.

Crabs were collected at two locations (33 and 93) annually. Locations 23, 24, 33, and 93 could be affected by Oyster Creeks effluent releases.

The following analysis was performed:

26 2019 OCGS AREOR

Gamma Spectrometry The edible portions of clam samples from all three locations were analyzed for gamma-emitting nuclides. Naturally occurring K-40 was found at all stations and ranged from 1,041 to 1,704 pCi/kg wet and was consistent with levels detected in previous years. No fission or activation products were found. (Table C-IV.2, Appendix C) Historical levels of Co-60 in clams are shown in Figure C-1, Appendix C. After 1986, all results were less than the Lower Limit of Detection (LLD).

Preoperational clam sample results for naturally occurring K-40 ranged from 600 to 9,800 pCi/kg wet, which are consistent with current sample results.

The edible portions of crab samples from 2 locations were analyzed for gamma-emitting nuclides. Naturally occurring K-40 was found at both stations and ranged from 2,587 to 2,731 pCi/kg wet, consistent with levels detected in previous years. No fission or activation products were found.

(Table C-IV.2, Appendix C)

Crabs were not sampled during the preoperational years of the OCGS environmental monitoring program.

6. Sediment Aquatic sediment samples were collected at four locations (23, 24, 33, and 94) semiannually. Of these locations, stations 23, 24, and 33 located downstream, could be affected by Oyster Creeks effluent releases. The following analysis was performed:

Gamma Spectrometry Sediment samples from all four locations were analyzed for gamma-emitting nuclides. Naturally occurring K-40 was found at all stations and ranged from 1,010 to 18,160 pCi/kg dry. Naturally occurring Ra-226 was found at one location at a concentration of 866 pCi/kg dry. Naturally occurring Th-228 was found at 7 of 8 stations and ranged from 110 to 8,666 pCi/kg wet. Cs-137 was not detected in any of the samples. No fission or activation products were found. (Table C-V.1, Appendix C)

The Figure C-3, Appendix C graph shows Cs-137 concentrations in sediment from 1984 through 2019 and Figure C-2, Appendix C graph shows Co-60 concentrations in sediment from 1984 through 2019.

The requirement for sampling sediment is a requirement of ODCM 3.12.1, Table 3.12.1-1.d. ODCM Table 3.12.1-2, Reporting Levels for Radioactive Concentrations in Environmental Samples Reporting Levels does not include requirements for sediment. CY-AA-170-1000, 27 2019 OCGS AREOR

Radiological Environmental Monitoring Program and Meteorological Program Implementation, Attachment 1, Analytical Results Investigation Levels, includes sediment investigation level for Cs-137 of 1000E+00 pCi/kg dry.

While aquatic sediment sampling was part of the preoperational program, samples were not analyzed for gamma-emitting nuclides until 1981.

In conclusion, the 2019 aquatic monitoring results for surface water, drinking water, groundwater, fish, clams, crabs, and sediment showed only naturally occurring radioactivity and were consistent with levels measured prior to the operation of OCGS, and with levels measured in past years. No radioactivity attributable to activities at OCGS was detected in any aquatic samples during 2019 and no adverse long-term trends are shown in the aquatic monitoring data.

B. Atmospheric Environment

1. Airborne

a. Air Particulates Continuous air particulate samples were collected from eight locations on a weekly basis. The eight locations were separated into three groups: Group I represents locations near the OCGS site boundary (20, 66 and 111), Group II represents the locations at an intermediate distance from the OCGS site (71, 72, and 73), and Group III represents the control and locations at a remote distance from OCGS (C and 3). The following analyses were performed:

Gross Beta Weekly samples were analyzed for concentrations of beta emitters.

Detectable gross beta activity was observed at all locations.

Comparison of results among the three groups aids in determining the effects, if any, resulting from the operation of OCGS. The results from the Site Boundary locations (Group I) ranged from 6.00E-03 to 50.00E-03 pCi/m3 with a mean of 13.00E-03 pCi/m3. The results from the Intermediate Distance locations (Group II) ranged from 5.00E-03 to 27.00E-03 pCi/m3 with a mean of 1200E-03 pCi/m3. The results from the Distant locations (Group III) ranged from 6.00E-03 to 25.00E-03 pCi/m3 with a mean of 12.00E-03 pCi/m3.

(Table C-VI.1 and C-VI.2, Appendix C)

The similarity of the results from the three groups indicates that there is no relationship between gross beta activity and distance from OCGS. These results are consistent with data from previous years 28 2019 OCGS AREOR

and indicate no effects from the operation of OCGS (Figures C-4 and C-5, Appendix C).

Air sample filters have been analyzed for gross beta activity since the inception of the preoperational environmental monitoring program in 1966. The preoperational data values ranged from 1.90E-02 to 2.77E-01 pCi/m3. The 2019 gross beta activity values ranged from

<5.00E-03 to 28.00E-03 pCi/m3. The 2019 results are consistent with historical operational data (Figure C-5, Appendix C) and fall within the range of results observed during the preoperational period.

Strontium-89 and Strontium-90 Weekly samples were composited quarterly and analyzed for Sr-89 and Sr-90. No strontium was detected in any of the samples.

(Table C-VI.3, Appendix C) These results are consistent with historical operational data. The preoperational environmental monitoring program did not include analysis of air samples for Sr-89 and Sr-90.

Gamma Spectrometry Weekly samples were composited quarterly and analyzed for gamma-emitting nuclides. Naturally occurring Be-7 due to cosmic ray activity was detected in 32 of 32 samples. The values ranged from 27.00E-03 to 113E-03 pCi/m3. All other nuclides were less than the MDC.

(Table C-VI.4, Appendix C) These results are consistent with historical operational data. The preoperational environmental monitoring program did not include analysis of air samples for gamma-emitting nuclides.

b. Airborne Iodine Continuous air samples were collected from eight (C, 3, 20, 66, 71, 72, 73, 111) locations and analyzed weekly for I-131. Consistent with historical operational data, all results were less than the MDC for I-131. (Table C-VII.1, Appendix C) The preoperational environmental monitoring program for OCGS did not include analysis of air media for I-131.

In conclusion, the atmospheric monitoring data are consistent with preoperational and prior operational data and show no long-term trends in the environment attributable to the operation of OCGS.

29 2019 OCGS AREOR

2. Terrestrial

a. Vegetation Samples were collected from four locations (35, 36, 66 and 115) when available. The following analyses were performed:

Strontium-89 and Strontium-90 Vegetation samples from all locations were analyzed for concentrations of Sr-89 and Sr-90. All Sr-89 results were less than the MDC. Sr-90 was detected in 16 of 33 samples. The values ranged from 2.7 to 13.8 pCi/kg wet, which is consistent with historical data.

(Table C-VIII.1, Appendix C)

The following information on Sr-90 is available on the NRC web page under Backgrounder Radiation Protection and the Tooth Fairy Issue published in December of 2004:

The largest source of Sr-90 in the environment (~99%) is from weapons testing fallout. Approximately 16.8 million curies of Sr-90 were produced and globally dispersed in atmospheric nuclear weapons testing until 1980. As a result of the Chernobyl accident, approximately 216,000 curies of Sr-90 were released into the atmosphere. With a 28-year half-life, Sr-90 still remains in the environment at nominal levels.

The total annual release of Sr-90 into the atmosphere from all 103 commercial nuclear power plants operating in the United States is typically 1/1000th of a curie. (NUREG/CR-2907 Vol.12). At an individual nuclear power plant, the amount of Sr-90 is so low that it is usually at or below the minimum detectable activity of sensitive detection equipment.

Oyster Creek did not report any Sr-90 released in the Annual Radioactive Effluent Release Report as all analyses for Sr-90 performed were less than the minimum detectable activity.

Gamma Spectrometry Vegetation samples from locations 35, 36, and 115 were analyzed for concentrations of gamma-emitting nuclides. Naturally occurring K-40 activity was found in all samples and ranged from 743 to 5,420 pCi/kg wet. Naturally occurring Be-7 was detected in 6 of 33 samples and ranged from 195 to 859 pCi/kg wet. All other nuclides were less than the MDC. (Table C-VIII.1, Appendix C)

Preoperational vegetation sample analyses did not include strontium analyses or gamma spectroscopy.

30 2019 OCGS AREOR

Oyster Creek conducted a Cs-137 study in 2006/2007. A report was generated titled "Evaluation of Cesium-137 in Environmental Samples from the Amergen Property East of the Oyster Creek Generating Station". Below is an excerpt from that report:

The levels of Cs-137 observed in the soil and vegetation samples are consistent with environmental concentrations known to be attributable to fallout from historic nuclear weapons testing and the Chernobyl accident. In addition, the variability of Cs-137 concentrations in soil and vegetation on the farm property appears to be driven by a number of environmental factors. Cs-137 concentrations in soil were non-detectable. Vegetation samples exhibited Cs-137 concentrations from non-detectable to 0.130 pCi/g, with a mean concentration of 0.078 pCi/g. For comparison, in the year 2000, as part of the confirmatory release survey for the adjacent Forked River site to the west of OCGS, the NRC reported that the maximum observed soil concentration of 0.53 pCi/g was not distinguishable from the variation in Cs-137 in the environment due to these fallout sources. The NRC also reported background Cs-137 concentrations in New Jersey coastal plain soils as high as 1.5 and 2.8 pCi/g. In addition, decay-corrected historic REMP data from a predominantly upwind location, nearly four miles from the OCGS, yields present-day Cs-137 concentrations ranging from 0.862 to 1.68 pCi/g.

In 2019, there was no Cs-137 identified in REMP soil samples, but it was detected in 3 vegetation samples. The concentrations ranged from 29 to 68 pCi/kg wet. It is not unusual for Cs-137 to be identified given the known environmental levels of this radionuclide attributable to atmospheric nuclear weapons testing and the Chernobyl accident.

In conclusion, terrestrial monitoring results for vegetation samples during 2019 showed only naturally-occurring radioactivity and radioactivity associated with fallout from past atmospheric nuclear weapons testing and Chernobyl. The radioactivity levels detected were consistent with levels measured in past years, and no radioactivity attributable to activities at OCGS was detected in any terrestrial samples. The terrestrial monitoring data show no adverse long-term trends in the terrestrial environment.

C. Ambient Gamma Radiation Ambient gamma radiation levels were measured using Optically Stimulated Luminenscence Dosimeters (OSLD). Sixty-one OSLD locations were monitored around the site with all measurements below 25 mRem/yr. Results of background corrected OSLD measurements are summarized in Tables C-IX.1 to C-IX.3 and Figure C-6.

31 2019 OCGS AREOR

The non-background corrected OSLD measurements ranged from 17.0 to 42.7 mR/standard quarter. In order to correct these results for background radiation, the mean of the dose rates measured at the background OSLD station (C) was subtracted from the dose measured at each indicator station.

The preoperational environmental monitoring program utilized film badges, the results of which are not comparable with the doses measured using thermoluminescent dosimeters or optically stimulated dosimeters during the operational REMP. In conclusion, the 2019 OSLD results are consistent with past operational measurements of direct radiation, and demonstrate that the OCGS continues to be in compliance with the 40 CFR 190 limit on maximum dose to the public.

D. Land Use Survey A Land Use Survey, conducted in August 2019 around the Oyster Creek Generating Station (OCGS), was performed by Normandeau Associates, Inc.

for HDI. The survey is conducted annually to identify any changes from the previous year. The purpose of the survey is to identify all milk animals and their locations, within each meteorological sector, at a distance of 5 miles from the plant. Additionally, the survey also identifies the location in each of the 16 meteorological sectors of the nearest milk animal, residence and garden greater than 500 feet2 in size producing broadleaf vegetation within 5 miles.

The census shall also identify within a distance of 3 miles the location in each of the 16 meteorological sectors all milk animals and gardens greater than 500 feet2 producing broadleaf vegetation. For animals producing milk for human consumption in each of the 16 meteorological sectors out to a distance of 5 miles from the OCGS, none were observed. The distance and direction of all locations from the OCGS Reactor Building were determined using Global Positioning System (GPS) technology. A new garden was found at the same distance from the site as the current garden sampled in the ENE sector; no action was necessary. The results of this survey are summarized below:

32 2019 OCGS AREOR

Distance in Feet from the OCGS Reactor Building Sector Residence (ft.) Garden* (ft.)

1 N 5,655 6,434 2 NNE 3,240 4,557 3 NE 3,245 3,932 4 ENE 5,704 6,386 5 E 6,549 1,758 6 ESE 3,189 2,081 7 SE 3,073 2,321 8 SSE 4,666 5,248 9 S 7,971 8,303 10 SSW 8,344 9,618 11 SW 9,285 9,776 12 WSW 10,713 12,354 13 W 22,191 None 14 WNW None None 15 NW 27,985 None 16 NNW 7,506 12,159

• Greater than 500 ft2 in size producing broad leaf vegetation 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:

A. 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.

B. 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 33 2019 OCGS AREOR

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

C. 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.

For the TBE laboratory, 119 out of 129 analyses performed met the specified acceptance criteria. Ten analyses did not meet the specified acceptance criteria for the following reasons and were addressed through the TBE Corrective Action Program. A summary is found below:

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

(NCR 19-10)

2. The ERA April 2019 water Sr-89 result was evaluated as Not Acceptable. The reported value was 44.9 pCi/L and the known result was 33.3 pCi/L (acceptance range of 24.5 - 40.1 pCi/L). The sample was only counted for 15 minutes instead of 200 minutes. The sample was re-prepped in duplicate and counted for 200 minutes with results of 30.7 +/- 5.37 pCi/L and 33.0 +/- 8.71 pCi/L. This was the 1st high failure for Sr-89 in 5 years. (NCR 19-11)

3. The MAPEP February 2019 soil Sr-90 result was not submitted and therefore evaluated as Not Acceptable. The sample was run in duplicate, with results of -1.32 +/- 4.09 Bq/kg (<6.87) and -1.030 +/- 3.55 34 2019 OCGS AREOR

Bq/kg (<5.97). The known result was a false positive test (no significant activity). TBE did not submit a result because it appeared that the results may not be accurate. TBE analyzed a substitute soil Sr-90 sample from another vendor, with a result within the acceptable range. (NCR 19-12)

4. The MAPEP February 2019 water Am-241 result was evaluated as Not Acceptable. The reported value was 0.764 +/- 0.00725 Bq/L with a known result of 0.582 Bq/L (acceptable range 0.407 - 0.757 Bq/L).

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

5. The MAPEP February 2019 vegetation Sr-90 result was evaluated as Not Acceptable. The reported result was -0.1060 +/- 0.0328 Bq/kg and the known result was a false positive test (no significant activity).

TBEs result was correct in that there was no activity. MAPEPs evaluation was a statistical failure at 3 standard deviations.

(NCR 19-14)

6. The ERA October 2019 water Gross Alpha result was evaluated as Not Acceptable. TBEs reported result was 40.5 +/- 10.3 pCi/L and the known result was 27.6 pCi/L (ratio of TBE to known result at 135%).

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

7. The ERA October 2019 water Sr-90 result was evaluated as Not Acceptable. TBEs reported result was 32.5 +/- 2.12 pCi/L and the known result was 26.5 pCi/L (ratio of TBE to known result at 123%).

With the associated error, the result falls within the acceptable range (19.2 - 30.9 pCi/L). The sample was run as the workgroup duplicate on a different detector with a result of 20.0 +/- 1.91 pCi/L (within the acceptable range). Both TBE results are within internal QC limits. A substitute quick response sample was analyzed with an acceptable result of 18.6 pCi/L (known range of 13.2 - 22.1 pCi/L). (NCR 19-24)

8. The MAPEP August 2019 soil Ni-63 result of 436 +/- 22.8 Bq/kg was evaluated as Not Acceptable. The known result was 629 Bq/kg (acceptable range 440 - 818 Bq/sample). With the associated error, the TBE result falls within the lower acceptance range. All associated QC was acceptable. No reason for failure could be found. This is the first failure for soil Ni-63 since 2012. (NCR 19-25) 35 2019 OCGS AREOR

9. The MAPEP August 2019 water Am-241 result was not reported and therefore evaluated as Not Acceptable. Initial review of the results showed a large peak where Am-241 should be (same as the February, 2019 sample results). It is believed that Th-228 was intentionally added as an interference. The sample was re-prepped and analyzed using a smaller sample aliquot. The unusual large peak (Th-228) was seen again and also this time a smaller peak (Am-241). The result was 436 +/- 22.8 Bq/L (acceptable range 0.365 +/- 0.679 Bq/L). Th-228 is not a typical nuclide requested by clients, so there is no analytical purpose to take samples through an additional separation step. TBE will pursue using another vendor for Am-241 water cross-checks that more closely reflects actual customer samples. (NCR 19-26)

10. The Analytics September 2019 soil Cr-51 sample was evaluated as Not Acceptable. TBEs reported result of 0.765 +/- 0.135 pCi/g exceeded the upper acceptance range (140% of the known result of 0.547 pCi/g).

The TBE result was within the acceptable range (0.63 - 0.90 pCi/g) with the associated error. The Cr-51 result is very close to TBEs normal detection limit. In order to get a reportable result, the sample must be counted for 15 hours1.736111e-4 days <br />0.00417 hours <br />2.480159e-5 weeks <br />5.7075e-6 months <br /> (10x longer than client samples). There is no client or regulatory requirement for this nuclide and TBE will remove Cr-51 from the reported gamma nuclides going forward. (NCR 19-27)

For the secondary QC samples, Environmental Inc., Midwest Laboratories (EIML) analyzed samples for H-3, Sr-89/90 and gamma nuclides. For these analyses, 43 of 44 analyses met the specified acceptance criteria.

One analysis did not meet the specified acceptance criteria for the following reason:

1. The July 2019 ERA water H-3 sample result was evaluated as Not Acceptable. The reported result was 8,630 +/- 0.135 pCi/L and the known result was 16,700 (range of 14,600 - 18,400). EIML's routine analysis does include a blank sample. The ERA-provided blank was paired with a H-3 standard vial and EIML's blank was also paired with a standard vial. Inadvertently, the efficiency was overestimated by a factor of 2, which caused the calculated result to be half of the actual value. The result of reanalysis (17,400 pCi/L) is within the control limits for the study.

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

36 2019 OCGS AREOR

V. References

1. HDI Offsite Dose Calculation Manual for Oyster Creek Generating Station, Procedure CY-OC-170-301.

2. United States Nuclear Regulatory Commission Branch Technical Position, An Acceptable Radiological Environmental Monitoring Program, Revision 1, November 1979.

3 Pre-Operational Environmental Radiation Survey, Oyster Creek Nuclear Electric Generating Station, Jersey Central Power and Light Company, March 1968.

VI. Errata There was no errata data for 2019.

37 2019 OCGS AREOR

APPENDIX A RADIOLOGICAL ENVIRONMENTAL MONITORING REPORT

SUMMARY

2019 OCGS AREOR

Intentionally left blank 2019 OCGS AREOR

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE OYSTER CREEK GENERATING STATION, 2019 NAME OF FACILITY: OYSTER CREEK GENERATING STATION DOCKET NUMBER: 50-219 LOCATION OF FACILITY: OCEAN COUNTY, NJ REPORTING PERIOD: 2019 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

MEDIUM OR REQUIRED LOCATIONS LOCATION NUMBER OF PATHWAY SAMPLED TYPES OF NUMBER OF LOWER LIMIT MEAN (M) MEAN (M) MEAN (M) STATION # NONROUTINE (UNIT OF ANALYSIS ANALYSIS OF DETECTION (F) (F) (F) NAME REPORTED MEASUREMENT) PERFORMED PERFORMED (LLD) RANGE RANGE RANGE DISTANCE AND DIRECTION MEASUREMENTS SURFACE WATER H-3 30 200 <LLD <LLD - 0 (PCI/LITER)

GAMMA 30 MN-54 15 <LLD <LLD - 0 CO-58 15 <LLD <LLD - 0 FE-59 30 <LLD <LLD - 0 CO-60 15 <LLD <LLD - 0 ZN-65 30 <LLD <LLD - 0 NB-95 15 <LLD <LLD - 0 ZR-95 30 <LLD <LLD - 0 I-131 15 <LLD <LLD - 0 CS-134 15 <LLD <LLD - 0 A-1 CS-137 18 <LLD <LLD - 0 BA-140 60 <LLD <LLD - 0 LA-140 15 <LLD <LLD - 0 DRINKING WATER H-3 40 NA <LLD <LLD - 0 (PCI/LITER)

GR-B 40 4 3.7 2.5 7.7 1N INDICATOR 0 (19/28) (8/12) (3/12) ON-SITE DOMESTIC WELL AT OCGS 1.8 - 11.8 1.6 - 5.3 2.9 - 11.8 0.2 MILES N OF SITE I-131 (LOW LVL) 40 1 <LLD <LLD - 0 GAMMA 40 MN-54 15 <LLD <LLD - 0 CO-58 15 <LLD <LLD - 0 FE-59 30 <LLD <LLD - 0 CO-60 15 <LLD <LLD - 0 ZN-65 30 <LLD <LLD - 0 NB-95 15 <LLD <LLD - 0 ZR-95 30 <LLD <LLD - 0 CS-134 15 <LLD <LLD - 0 CS-137 18 <LLD <LLD - 0 BA-140 60 <LLD <LLD - 0 2019 OCGS AREOR LA-140 15 <LLD <LLD - 0 (M) The Mean Values are calculated using the positive values. (F) Fraction of detectable measurement are indicated in parentheses.

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE OYSTER CREEK GENERATING STATION, 2019 NAME OF FACILITY: OYSTER CREEK GENERATING STATION DOCKET NUMBER: 50-219 LOCATION OF FACILITY: OCEAN COUNTY, NJ REPORTING PERIOD: 2019 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

MEDIUM OR REQUIRED LOCATIONS LOCATION NUMBER OF PATHWAY SAMPLED TYPES OF NUMBER OF LOWER LIMIT MEAN (M) MEAN (M) MEAN (M) STATION # NONROUTINE (UNIT OF ANALYSIS ANALYSIS OF DETECTION (F) (F) (F) NAME REPORTED MEASUREMENT) PERFORMED PERFORMED (LLD) RANGE RANGE RANGE DISTANCE AND DIRECTION MEASUREMENTS GROUNDWATER H-3 8 200 <LLD NA - 0 (PCI/LITER)

GAMMA 8 MN-54 15 <LLD NA - 0 CO-58 15 <LLD NA - 0 FE-59 30 <LLD NA - 0 CO-60 15 <LLD NA - 0 ZN-65 30 <LLD NA - 0 NB-95 15 <LLD NA - 0 ZR-95 30 <LLD NA - 0 A-2 I-131 15 <LLD NA - 0 CS-134 15 <LLD NA - 0 CS-137 18 <LLD NA - 0 BA-140 60 <LLD NA - 0 LA-140 15 <LLD NA - 0 BOTTOM FEEDER GAMMA 4 (PCI/KG WET) K-40 NA 3290 NA 3290 33 INDICATOR 0 (4/4) (4/4) EAST OF RT 9 BRIDGE IN OCGS DISCHARGE 2467 - 4717 2467 - 4717 0.4 MILES ESE OF SITE MN-54 130 <LLD NA - 0 CO-58 130 <LLD NA - 0 FE-59 260 <LLD NA - 0 CO-60 130 <LLD NA - 0 ZN-65 260 <LLD NA - 0 CS-134 130 <LLD NA - 0 CS-137 150 <LLD NA - 0 2019 OCGS AREOR (M) The Mean Values are calculated using the positive values. (F) Fraction of detectable measurement are indicated in parentheses.

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE OYSTER CREEK GENERATING STATION, 2019 NAME OF FACILITY: OYSTER CREEK GENERATING STATION DOCKET NUMBER: 50-219 LOCATION OF FACILITY: OCEAN COUNTY, NJ REPORTING PERIOD: 2019 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

MEDIUM OR REQUIRED LOCATIONS LOCATION NUMBER OF PATHWAY SAMPLED TYPES OF NUMBER OF LOWER LIMIT MEAN (M) MEAN (M) MEAN (M) STATION # NONROUTINE (UNIT OF ANALYSIS ANALYSIS OF DETECTION (F) (F) (F) NAME REPORTED MEASUREMENT) PERFORMED PERFORMED (LLD) RANGE RANGE RANGE DISTANCE AND DIRECTION MEASUREMENTS PREDATOR GAMMA 3 (PCI/KG WET) K-40 NA 4748 NA 5087 93 INDICATOR 0 (3/3) (2/2) OCGS DISCHARGE CANAL 4070 - 5932 4241 - 5932 0.1 MILES WSW OF SITE MN-54 130 <LLD NA - 0 CO-58 130 <LLD NA - 0 FE-59 260 <LLD NA - 0 CO-60 130 <LLD NA - 0 ZN-65 260 <LLD NA - 0 CS-134 130 <LLD NA - 0 CS-137 150 <LLD NA - 0 A-3 CLAMS GAMMA 6 (PCI/KG WET) K-40 NA 1192 1496 1496 94 CONTROL 0 (4/4) (2/2) (2/2) GREAT BAY/LITTLE EGG HARBOR 1041 - 1475 1288 - 1704 1288 - 1704 20.0 MILES SSW OF SITE MN-54 130 <LLD <LLD - 0 CO-58 130 <LLD <LLD - 0 FE-59 260 <LLD <LLD - 0 CO-60 130 <LLD <LLD - 0 ZN-65 260 <LLD <LLD - 0 CS-134 130 <LLD <LLD - 0 CS-137 150 <LLD <LLD - 0 CRABS GAMMA 2 (PCI/KG WET) K-40 NA 2659 NA 2731 33 INDICATOR 0 (2/2) (1/1) EAST OF RT 9 BRIDGE IN OCGS DISCHARGE 2587 - 2731 0.4 MILES ESE OF SITE MN-54 130 <LLD NA - 0 CO-58 130 <LLD NA - 0 FE-59 260 <LLD NA - 0 CO-60 130 <LLD NA - 0 ZN-65 260 <LLD NA - 0 130 - 0 2019 OCGS AREOR CS-134 <LLD NA CS-137 150 <LLD NA - 0 (M) The Mean Values are calculated using the positive values. (F) Fraction of detectable measurement are indicated in parentheses.

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE OYSTER CREEK GENERATING STATION, 2019 NAME OF FACILITY: OYSTER CREEK GENERATING STATION DOCKET NUMBER: 50-219 LOCATION OF FACILITY: OCEAN COUNTY, NJ REPORTING PERIOD: 2019 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

MEDIUM OR REQUIRED LOCATIONS LOCATION NUMBER OF PATHWAY SAMPLED TYPES OF NUMBER OF LOWER LIMIT MEAN (M) MEAN (M) MEAN (M) STATION # NONROUTINE (UNIT OF ANALYSIS ANALYSIS OF DETECTION (F) (F) (F) NAME REPORTED MEASUREMENT) PERFORMED PERFORMED (LLD) RANGE RANGE RANGE DISTANCE AND DIRECTION MEASUREMENTS SEDIMENT GAMMA 8 (PCI/KG DRY) BE-7 NA <LLD <LLD - 0 K-40 NA 8340 16150 17160 24 INDICATOR 0 (6/6) (2/2) (2/2) BARNEGAT BAY 1010 - 18160 15000 - 17300 16160 - 18160 2.1 MILES E OF SITE MN-54 NA <LLD <LLD - 0 CO-58 NA <LLD <LLD - 0 CO-60 NA <LLD <LLD - 0 CS-134 150 <LLD <LLD - 0 CS-137 180 <LLD <LLD - 0 Ra-226 NA 866 NA 866 33 INDICATOR 0 (1/6) (1/2) EAST OF RT 9 BRIDGE IN OCGS DISCHARGE A-4 0.4 MILES ESE OF SITE Th-226 NA 478 642 806 24 INDICATOR (6/6) (1/2) (2/2) BARNEGAT BAY 0 110 - 866 745 - 866 2.1 MILES E OF SITE AIR PARTICULATE GR-B 410 10 12 12 14 C CONTROL 0 (E-3 PCI/CU.METER) (282/308) (92/102) (48/50) JCP&L OFFICE - COOKSTOWN NJ 6 - 50 6 - 25 7 - 25 24.7 MILES NW OF SITE SR-89 32 10 <LLD <LLD - 0 SR-90 32 10 <LLD <LLD - 0 GAMMA 32 BE-7 NA 60 68 78 66 INDICATOR 0 (24/24) (8/8) (4/4) EAST OF RT 9 AND SOUTH OF OCGS DISCHG 27 - 113 41 - 90 47 - 113 0.4 MILES SE OF SITE MN-54 NA <LLD <LLD - 0 CO-58 NA <LLD <LLD - 0 CO-60 NA <LLD <LLD - 0 CS-134 50 <LLD <LLD - 0 CS-137 60 <LLD <LLD - 0 2019 OCGS AREOR (M) The Mean Values are calculated using the positive values. (F) Fraction of detectable measurement are indicated in parentheses.

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE OYSTER CREEK GENERATING STATION, 2019 NAME OF FACILITY: OYSTER CREEK GENERATING STATION DOCKET NUMBER: 50-219 LOCATION OF FACILITY: OCEAN COUNTY, NJ REPORTING PERIOD: 2019 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

MEDIUM OR REQUIRED LOCATIONS LOCATION NUMBER OF PATHWAY SAMPLED TYPES OF NUMBER OF LOWER LIMIT MEAN (M) MEAN (M) MEAN (M) STATION # NONROUTINE (UNIT OF ANALYSIS ANALYSIS OF DETECTION (F) (F) (F) NAME REPORTED MEASUREMENT) PERFORMED PERFORMED (LLD) RANGE RANGE RANGE DISTANCE AND DIRECTION MEASUREMENTS AIR IODINE GAMMA 402 (E-3 PCI/CU.METER) I-131 70 <LLD <LLD - 0 VEGETATION SR-89 33 25 <LLD <LLD - 0 (PCI/KGWET)

SR-90 33 5 6.4 9.2 9.2 36 CONTROL 0 (8/21) (8/12) (8/12) U-PICK FARM - NEW EGYPT NJ 2.7 - 13.8 3.1 - 13.7 3.1 - 13.7 23.1 MILES NW OF SITE GAMMA 33 BE-7 NA 420 <LLD 447 115 INDICATOR 0 A-5 (6/21) (3/10) EAST OF SITE 195 - 859 210 - 859 0.4 MILES SE OF SITE K-40 NA 2202 3651 3651 36 CONTROL 0 (21/21) (12/12) (12/12) U-PICK FARM - NEW EGYPT NJ 743 - 4926 1425 - 5240 1425 - 5240 23.1 MILES NW OF SITE I-131 60 <LLD <LLD - 0 CS-134 60 <LLD <LLD - 0 CS-137 80 48 <LLD 48 115 INDICATOR 0 (3/21) (3/10) EAST OF SITE 29 - 68 29 - 63 0.3 MILES E OF SITE BA-140 NA <LLD <LLD - 0 LA-140 NA <LLD <LLD - 0 DIRECT RADIATION OSLD-QUARTERLY 516 NA 24.6 22.6 32.8 55 INDICATOR 0 (MILLIREM/STD.MO.) (492/492) (24/24) (16/16) SOUTHERN AREA STORES SECURITY FENCE 17.0 - 42.7 19.4 - 25.9 26.3 - 42.7 0.3 MILES W 2019 OCGS AREOR (M) The Mean Values are calculated using the positive values. (F) Fraction of detectable measurement are indicated in parentheses.

Intentionally left blank 2019 OCGS AREOR

APPENDIX B LOCATION DESIGNATION, DISTANCE & DIRECTION, AND SAMPLE COLLECTION & ANALYTICAL METHODS 2019 OCGS AREOR

Intentionally left blank 2019 OCGS AREOR

TABLE B-1: Location Designation and Identification System for the Oyster Creek Generating Station Sample Medium - APT = Air Particulate Clam = Clam AIO = Air Iodine OSLD = Optically Stimulated DW = Drinking Water Dosimetry VEG = Vegetation Fish = Fish SWA = Surface Water Crab = Crab AQS = Aquatic Sediment GW = Ground Water Station Code - Stations Designation Distance - Distance from the OCGS in miles Azimuth - Azimuth with respect to the OCGS in degrees Description - Meteorological sector in which the station is located and a narrative description B-1 2019 OCGS AREOR

TABLE B-2: Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, Oyster Creek Generating Station, 2019 Sample Station Distance Azimuth Medium Code (miles) (degrees) Description OSLD 1 0.4 219 SW of site at OCGS Fire Pond, Forked River, NJ DW 1S 0.1 209 On-site southern domestic well at OCGS, Forked River, NJ DW 1N 0.2 349 On-site northern domestic well at OCGS, Forked River, NJ APT, AIO, OSLD 3 6.0 97 East of site, near old Coast Guard Station, Island Beach State Park OSLD 4 4.6 213 SSW of site, Route 554 and Garden State Parkway, Barnegat, NJ OSLD 5 4.2 353 North of site, at Garden State Parkway Rest Area, Forked River, NJ OSLD 6 2.1 13 NNE of site, Lane Place, behind St. Pius Church, Forked River, NJ OSLD 8 2.3 177 South of site, Route 9 at the Waretown Substation, Waretown, NJ OSLD 9 2.0 230 WSW of site, west of where Route 532 and the Garden State Parkway meet, Waretown, NJ B-2 APT, AIO, OSLD C 24.7 313 NW of site, JCP&L office in rear parking lot, Cookstown, NJ th OSLD 11 8.2 152 SSE of site, 80 and Anchor Streets, Harvey Cedars, NJ OSLD 14 20.8 2 North of site, Larrabee Substation on Randolph Road, Lakewood, NJ APT, AIO 20 0.7 95 East of site, on Finninger Farm on south side of access road, Forked River, NJ OSLD 22 1.6 145 SE of site, on Long John Silver Way, Skippers Cove, Waretown, NJ SWA, CLAM, AQS 23 3.6 64 ENE of site, Barnegat Bay off Stouts Creek, approximately 400 yards SE of Flashing Light 1 SWA, CLAM, AQS 24 2.1 101 East of site, Barnegat Bay, approximately 250 yards SE of Flashing Light 3 SWA, AQS, 33 0.4 123 ESE of site, east of Route 9 Bridge in OCGS Discharge Canal FISH, CRAB VEG 35 0.4 111 ESE of site, east of Route 9 and north of the OCGS Discharge Canal, Forked River, NJ 2019 OCGS AREOR VEG 36 23.1 319 NW of site, at "U-Pick" Farm, New Egypt, NJ

TABLE B-2: Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, Oyster Creek Generating Station, 2019 Sample Station Distance Azimuth Medium Code (miles) (degrees) Description DW 37 2.2 18 NNE of Site, off Boox Road at Lacey MUA Pumping Station, Forked River, NJ DW 38 1.6 197 SSW of Site, on Route 532, at Ocean Township MUA Pumping Station, Waretown, NJ OSLD 46 5.6 323 NW of site, on Lacey Road, adjacent to utility pole BT 259 65, Forked River, NJ OSLD 47 4.6 26 NNE of site, Route 9 and Harbor Inn Road, Bayville, NJ OSLD 48 4.5 189 South of site, at intersection of Brook and School Streets, Barnegat, NJ OSLD 51 0.4 358 North of site, on the access road to Forked River site, Forked River, NJ OSLD 52 0.3 333 NNW of site, on the access road to Forked River site, Forked River, NJ OSLD 53 0.3 309 NW of site, at sewage lift station on the access road to the Forked River site, Forked River, NJ B-3 OSLD 54 0.3 288 WNW of site, on the access road to Forked River site, Forked River, NJ OSLD 55 0.3 263 West of site, on Southern Area Stores security fence, west of OCGS Switchyard, Forked River, NJ OSLD 56 0.3 249 WSW of site, on utility pole east of Southern Area Stores, west of the OCGS Switchyard, Forked River, NJ OSLD 57 0.2 206 SSW of site, on Southern Area Stores access road, Forked River, NJ OSLD 58 0.2 188 South of site, on Southern Area Stores access road, Forked River, NJ OSLD 59 0.3 166 SSE of site, on Southern Area Stores access road, Waretown, NJ OSLD 61 0.3 104 ESE of site, on Route 9 south of OCGS Main Entrance, Forked River, NJ 2019 OCGS AREOR

TABLE B-2: Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, Oyster Creek Generating Station, 2019 Sample Station Distance Azimuth Medium Code (miles) (degrees) Description OSLD 62 0.2 83 East of site, on Route 9 at access road to OCGS Main Gate, Forked River, NJ OSLD 63 0.2 70 ENE of site, on Route 9, between main gate and OCGS North Gate access road, Forked River, NJ OSLD 64 0.3 42 NE of site, on Route 9 North at entrance to Finninger Farm, Forked River, NJ OSLD 65 0.4 19 NNE of site, on Route 9 at Intake Canal Bridge, Forked River, NJ APT, AIO, 66 0.4 133 SE of site, east of Route 9 and south of the OCGS Discharge Canal, inside fence, Waretown, NJ OSLD, VEG OSLD 68 1.3 266 West of site, on Garden State Parkway North at mile marker 71.7, Lacey Township, NJ APT, AIO, OSLD 71 1.6 164 SSE of site, on Route 532 at the Waretown Municipal Building, Waretown, NJ APT, AIO, OSLD 72 1.9 25 NNE of site, on Lacey Road at Knights of Columbus Hall, Forked River, NJ APT, AIO, OSLD 73 1.8 108 ESE of site, on Bay Parkway, Sands Point Harbor, Waretown, NJ B-4 OSLD 74 1.8 88 East of site, Orlando Drive and Penguin Court, Forked River, NJ OSLD 75 2.0 71 ENE of site, Beach Blvd. and Maui Drive, Forked River, NJ OSLD 78 1.8 2 North of site, 1514 Arient Road, Forked River, NJ OSLD 79 2.9 160 SSE of site, Hightide Drive and Bonita Drive, Waretown, NJ OSLD 81 3.5 201 SSW of site, on Rose Hill Road at intersection with Barnegat Boulevard, Barnegat, NJ OSLD 82 4.4 36 NE of site, Bay Way and Clairmore Avenue, Lanoka Harbor, NJ OSLD 84 4.4 332 NNW of site, on Lacey Road, 1.3 miles west of the Garden State Parkway on siren pole, Lacey Township, NJ OSLD 85 3.9 250 WSW of site, on Route 532, just east of Wells Mills Park, Waretown, NJ 2019 OCGS AREOR OSLD 86 5.0 224 SW of site, on Route 554, 1 mile west of the Garden State Parkway, Barnegat, NJ

TABLE B-2: Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, Oyster Creek Generating Station, 2019 Sample Station Distance Azimuth Medium Code (miles) (degrees) Description OSLD 88 6.6 125 rd SE of site, eastern end of 3 Street, Barnegat Light, NJ OSLD 89 6.1 108 ESE of site, Job Francis residence, Island Beach State Park OSLD 90 6.3 75 ENE of site, parking lot A-5, Island Beach State Park OSLD 92 9.0 108 NE of site, at Guard Shack/Toll Booth, Island Beach State Park FISH, CRAB 93 0.1 242 WSE of site, OCGS Discharge Canal between Pump Discharges and Route 9, Forked River, NJ SWA, AQS, 94 20.0 198 SSW of site, in Great Bay/Little Egg Harbor CLAM, FISH OSLD 98 1.6 318 NW of site, on Garden State Parkway North at mile marker 73, Lacey Township, NJ OSLD 99 1.5 310 NW of site, on Garden State Parkway at mile marker 72.8, Lacey Township, NJ B-5 OSLD 100 1.4 43 NE of site, Yacht Basin Plaza South off Lakeside Dr., Lacey Township, NJ OSLD 101 1.7 49 NE of site, end of Lacey Rd. East, Lacey Township, NJ OSLD 102 1.6 344 NNW of site, end of Sheffield Dr., Barnegat Pines, Lacey Township, NJ OSLD 103 2.4 337 NNW of site, Llewellyn Pkwy., Barnegat Pines, Lacey Township, NJ OSLD 104 1.8 221 SW of site, Rt. 532 West, before Garden State Parkway, Ocean Township, NJ OSLD 105 2.8 222 SW of site, Garden State Parkway North beside mile marker 69.6, Ocean Township, NJ OSLD 106 1.2 288 WNW of site, Garden State Parkway North beside mile marker 72.2, Lacey Township, NJ OSLD 107 1.3 301 WNW of site, Garden State Parkway North beside mile marker 72.5, Lacey Township, NJ OSLD 109 1.2 141 SE of site, Lighthouse Dr., Waretown, Ocean Township, NJ 2019 OCGS AREOR

TABLE B-2: Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, Oyster Creek Generating Station, 2019 Sample Station Distance Azimuth Medium Code (miles) (degrees) Description OSLD 110 1.5 127 SE of site, Tiller Dr. and Admiral Way, Waretown, Ocean Township, NJ APT, AIO 111 0.3 64 ENE of site, Finninger Farm property along access road, Lacey Township, NJ OLSD 112 0.2 176 S of site, along southern access road OLSD 113 0.3 90 E of site, along Rt.9, North DW 114 0.8 267 Well at Bldg 25 on Forked River site VEG 115 0.3 96 E of Site, on Finninger Farm OSLD T1 0.4 219 SW of site, at OCGS Fire Pond, Forked River, NJ GW MW-24-3A 0.8 97 ESE of site, Finninger Farm on South side of access road, Lacey Township, NJ GW W-3C 0.4 112 ESE of site, Finninger Farm adjacent to Station 35, Lacey Township, NJ B-6 2019 OCGS AREOR

TABLE B-3: Radiological Environmental Monitoring Program - Summary of Sample Collection and Analytical Methods, Oyster Creek Generating Station, 2019 Sample Medium Analysis Sampling Method Collection Procedure Number Sample Size Analytical Procedure Number ER-OCGS-06, Collection of water samples for TBE, TBE-2007 Gamma-Emitting Radioisotopes Analysis radiological analysis Drinking Water Gamma Spectroscopy Monthly samples 1 gallon Env. Inc., GS-01 Determination of gamma emitters by CY-OC-120-1200, REMP sample collection gamma spectroscopy procedure - well water ER-OCGS-06, Collection of water samples for TBE, TBE-2011 Tritium in Drinking Water by Liquid radiological analysis Scintillation Drinking Water Tritium Monthly samples 1 gallon CY-OC-120-1200, REMP sample collection Env. Inc., T-02 Determination of tritium in water (direct procedure - well water method)

ER-OCGS-06, Collection of water samples for TBE, TBE-2012 Radioiodine in Various Matrices radiological analysis Drinking water Iodine Monthly Samples 1 gallon Env. Inc., I-131-01 Determination of I-131 in water by CY-OC-120-1200, REMP sample collection anion exchange procedure - well water ER-OCGS-06, Collection of water samples for radiological analysis TBE, TBE-2008 Gross Alpha and/or Gross Beta Activity Drinking Water Gross Beta Monthly Samples 1 gallon B-7 CY-OC-120-1200, REMP sample collection in Various Matrices procedure - well water ER-OCGS-06, Collection of water samples for TBE, TBE-2007 Gamma-Emitting Radioisotopes Analysis Surface Water Gamma Spectroscopy Grab Sample radiological analysis 1 gallon Env. Inc., GS-01 Determination of gamma emitters by gamma spectroscopy TBE, TBE-2011 Tritium in Drinking Water by Liquid ER-OCGS-06, Collection of water samples for Scintillation Surface Water Tritium Grab Sample radiological analysis 1 gallon Env. Inc., T-02 Determination of tritium in water (direct method)

ER-OCGS-06, Collection of water samples for TBE, TBE-2011 Tritium in Drinking Water by Liquid Groundwater Tritium Grab Sample 1 gallon Scintillation radiological analysis TBE, TBE-2007 Gamma-Emitting Radioisotopes Analysis ER-OCGS-06, Collection of water samples for Groundwater Gamma Grab Sample 1 gallon Env. Inc., GS-01 Determination of gamma emitters by radiological analysis gamma spectroscopy Semi-annual samples ER-OCGS-14, Collection of fish samples for Fish Gamma Spectroscopy collected via hook and radiological analysis 250 grams (wet) TBE, TBE-2007 Gamma-Emitting Radioisotopes Analysis 2019 OCGS AREOR line technique and traps

TABLE B-3: Radiological Environmental Monitoring Program - Summary of Sample Collection and Analytical Methods, Oyster Creek Generating Station, 2019 Sample Analysis Sampling Method Collection Procedure Number Sample Size Analytical Procedure Number Medium Semi-annual and annual ER-OCGS-16, Collection of clam and crab Clams and Gamma Spectroscopy samples collected using samples for radiological analysis 300 grams (wet) TBE, TBE-2007 Gamma-Emitting Radioisotopes Analysis Crabs clam tongs and traps.

TBE, TBE-2007 Gamma-Emitting Radioisotopes Analysis ER-OCGS-03, Collection of aquatic sediment Semi-annual grab Sediment Gamma Spectroscopy samples for radiological analysis 1000 grams (dry) samples Env. Inc., GS-01 Determination of gamma emitters by gamma spectroscopy One-week composite of ER-OCGS-05, Collection of air iodine and air 1 filter (approximately continuous air sampling TBE, TBE-2008 Gross alpha and/or beta activity in Air Particulates Gross Beta particulate samples for radiological analysis 300 cubic meters through glass fiber filter various matrices weekly) paper TBE, TBE-2023 Compositing of samples 13 filters Quarterly composite of Env. Inc., AP-03 Procedure for compositing air Air Particulates Gamma Spectroscopy (approximately 4000 TBE, TBE-2007 Gamma-Emitting Radioisotopes Analysis each station particulate filters for gamma spectroscopic cubic meters) analysis B-8 ER-OCGS-05, Collection of air iodine and air 13 filters Quarterly composite of TBE, TBE-2018 Radiostrontium Analysis by Chemical Air Particulates Strontium-89/90 particulate samples for radiological analysis (approximately 4000 each station Separation cubic meters)

One-week composite of ER-OCGS-05, Collection of air iodine and air 1 filter (approximately Air Iodine Gamma Spectroscopy continuous air sampling particulate samples for radiological analysis 300 cubic meters TBE, TBE-2007 Gamma-Emitting Radioisotopes Analysis through charcoal filter weekly)

ER-OCGS-04, Collection of food products and TBE, TBE-2007 Gamma-Emitting Radioisotopes Analysis Grab sample during broadleaf vegetation samples for radiological Vegetation Gamma Spectroscopy 1000 grams growing season analysis Env. Inc., GS-01 Determination of gamma emitters by gamma spectroscopy ER-OCGS-04, Collection of food products and TBE, TBE-2018 Radiostrontium Analysis by Chemical Grab sample during broadleaf vegetation samples for radiological Separation Vegetation Strontium-89/90 1000 grams growing season analysis Env. Inc., SR-05 Determination of Sr-89 and Sr-90 in Ashed Samples Quarterly OSLDs Optically Stimulated comprised of two ER OCGS-02, Collection/Exchange of Field OSLD Luminescence 2 dosimeters Landauer Incorporated Al2O3:C Landauer Dosimeters for Radiological Analysis Dosimetry 2019 OCGS AREOR Incorporated elements.

Figure B-1 Locations of REMP Stations within a 1-mile radius of the Oyster Creek Generating Station B-9 2019 OCGS AREOR

Figure B-2 Locations of REMP Stations within a 1 to 5-mile radius of the Oyster Creek Generating Station B-10 2019 OCGS AREOR

Figure B-3 Locations of REMP Stations greater than 5 miles from the Oyster Creek Generating Station B-11 2019 OCGS AREOR

Intentionally left blank 2019 OCGS AREOR

APPENDIX C DATA TABLES AND FIGURES PRIMARY LABORATORY 2019 OCGS AREOR

Intentionally left blank 2019 OCGS AREOR

Table C-I.1 CONCENTRATIONS OF TRITIUM IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF OYSTER CREEK GENERATING STATION, 2019 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION PERIOD 23 24 33 94 01/07/19 - 01/31/19 < 197 < 191 02/05/19 - 02/28/19 < 188 < 188 03/06/19 - 03/26/19 < 196 < 194 04/01/19 - 05/01/19 < 188 < 186 05/09/19 - 05/31/19 < 182 < 184 06/03/19 - 06/26/19 < 193 < 191 < 194 < 184 07/01/19 - 07/31/19 < 192 < 198 08/06/19 - 08/28/19 < 197 < 199 09/05/19 - 09/30/19 < 180 < 188 < 191 10/01/19 - 10/29/19 < 180 < 184 < 184 11/05/19 - 11/25/19 < 190 < 190 12/06/19 - 01/02/20 < 185 < 188 MEAN - - - -

C-1 2019 OCGS AREOR

Table C-I.2 CONCENTRATIONS OF GAMMA EMITTERS IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF OYSTER CREEK GENERATING STATION, 2019 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE PERIOD Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 I-131 Cs-134 Cs-137 Ba-140 La-140 23 06/03/19 - 06/03/19 < 7 < 7 < 16 < 6 < 14 < 10 < 11 < 13 < 8 < 5 < 30 < 11 10/01/19 - 10/01/19 < 7 < 6 < 14 < 6 < 12 < 5 < 9 < 8 < 6 < 7 < 27 < 7 MEAN - - - - - - - - - - - -

24 06/03/19 - 06/03/19 < 6 < 7 < 11 < 5 < 19 < 7 < 12 < 11 < 8 < 8 < 35 < 10 09/30/19 - 09/30/19 < 6 < 6 < 14 < 7 < 10 < 5 < 7 < 8 < 5 < 4 < 24 < 8 MEAN - - - - - - - - - - - -

33 01/09/19 - 01/31/19 < 7 < 5 < 11 < 6 < 11 < 6 < 11 < 9 < 6 < 7 < 22 < 7 02/06/19 - 02/27/19 < 6 < 6 < 12 < 6 < 13 < 7 < 12 < 13 < 7 < 6 < 33 < 10 03/06/19 - 03/26/19 < 6 < 5 < 15 < 6 < 10 < 7 < 9 < 12 < 6 < 7 < 31 < 6 04/03/19 - 05/01/19 < 6 < 7 < 13 < 8 < 11 < 7 < 11 < 11 < 7 < 6 < 28 < 9 C-2 05/09/19 - 05/31/19 < 5 < 5 < 13 < 5 < 14 < 6 < 10 < 10 < 5 < 6 < 25 < 8 06/04/19 - 06/26/19 < 7 < 6 < 17 < 6 < 13 < 8 < 11 < 12 < 8 < 7 < 33 < 11 07/01/19 - 07/31/19 < 7 < 7 < 17 < 9 < 16 < 8 < 13 < 15 < 8 < 8 < 39 < 11 08/06/19 - 08/28/19 < 7 < 6 < 16 < 6 < 16 < 6 < 10 < 12 < 7 < 7 < 32 < 14 09/05/19 - 09/25/19 < 5 < 6 < 12 < 6 < 10 < 5 < 8 < 8 < 5 < 5 < 23 < 10 10/01/19 - 10/29/19 < 3 < 3 < 7 < 4 < 8 < 4 < 6 < 6 < 4 < 3 < 18 < 5 11/05/19 - 11/25/19 < 6 < 8 < 13 < 7 < 13 < 8 < 12 < 13 < 8 < 8 < 35 < 12 12/06/19 - 01/02/20 < 7 < 6 < 11 < 5 < 11 < 7 < 11 < 10 < 7 < 8 < 33 < 14 MEAN - - - - - - - - - - - -

94 01/07/19 - 01/28/19 < 6 < 6 < 14 < 7 < 17 < 8 < 11 < 13 < 6 < 7 < 40 < 14 02/05/19 - 02/28/19 < 6 < 7 < 18 < 10 < 17 < 8 < 14 < 15 < 10 < 9 < 38 < 11 03/07/19 - 03/26/19 < 5 < 5 < 11 < 5 < 10 < 4 < 9 < 8 < 6 < 5 < 27 < 10 04/01/19 - 05/01/19 < 5 < 5 < 10 < 5 < 12 < 5 < 8 < 8 < 6 < 6 < 23 < 7 05/09/19 - 05/31/19 < 6 < 6 < 13 < 8 < 11 < 8 < 11 < 9 < 7 < 6 < 28 < 10 06/04/19 - 06/25/19 < 5 < 6 < 11 < 6 < 13 < 6 < 10 < 10 < 7 < 6 < 23 < 6 07/01/19 - 07/30/19 < 6 < 7 < 14 < 7 < 14 < 5 < 13 < 13 < 7 < 6 < 28 < 13 08/06/19 - 08/27/19 < 7 < 7 < 16 < 7 < 11 < 8 < 11 < 11 < 7 < 7 < 39 < 12 09/05/19 - 09/24/19 < 6 < 5 < 11 < 6 < 12 < 7 < 11 < 11 < 6 < 6 < 30 < 9 10/01/19 - 10/28/19 < 3 < 4 < 7 < 4 < 9 < 4 < 7 < 6 < 4 < 4 < 14 < 6 11/05/19 - 11/25/19 < 6 < 6 < 17 < 5 < 15 < 9 < 12 < 12 < 8 < 7 < 30 < 13 12/06/19 - 01/02/20 < 6 < 5 < 11 < 6 < 11 < 5 < 12 < 9 < 6 < 6 < 25 < 8 2019 OCGS AREOR MEAN - - - - - - - - - - - -

Table C-II.1 CONCENTRATIONS OF TRITIUM IN DRINKING WATER SAMPLES COLLECTED IN THE VICINITY OF OYSTER CREEK GENERATING STATION, 2019 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION PERIOD 114 1N 1S 37 38 01/07/19 - 01/31/19 < 190 < 186 (1) < 185 < 189 02/04/19 - 03/06/19 < 190 < 190 (1) < 191 < 188 03/06/19 - 03/27/19 < 195 < 193 (1) < 196 < 198 04/01/19 - 05/01/19 < 190 < 189 (1) < 189 < 186 05/06/19 - 05/31/19 (1) < 185 (1) < 185 < 185 06/04/19 - 06/26/19 (1) < 197 (1) < 196 < 191 07/01/19 - 07/31/19 (1) < 191 (1) < 197 < 192 08/06/19 - 08/28/19 (1) < 198 (1) < 198 < 196 09/04/19 - 09/26/19 (1) < 195 (1) < 190 < 188 10/02/19 - 10/30/19 (1) < 191 (1) < 186 < 186 11/05/19 - 11/29/19 (1) < 188 (1) < 189 < 182 12/04/19 - 01/02/20 (1) < 191 (1) < 188 < 185 MEAN - - - - -

Table C-II.2 CONCENTRATIONS OF GROSS BETA IN DRINKING WATER SAMPLES COLLECTED IN THE VICINITY OF OYSTER CREEK GENERATING STATION, 2019 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION PERIOD 114 1N 1S 37 38 01/07/19 - 01/31/19 3.3 +/- 1.4 11.8 +/- 1.9 (1) < 1.7 2.3 +/- 1.2 02/04/19 - 03/06/19 3.5 +/- 1.2 8.5 +/- 1.7 (1) < 1.6 2.3 +/- 1.1 03/06/19 - 03/27/19 4.1 +/- 1.3 < 1.8 (1) 1.8 +/- 1.0 1.8 +/- 1.0 04/01/19 - 05/01/19 4.2 +/- 1.4 < 1.7 (1) 3.0 +/- 1.2 2.2 +/- 1.2 05/06/19 - 05/31/19 (1) < 1.7 (1) < 1.6 2.9 +/- 1.2 06/04/19 - 06/26/19 (1) < 1.6 (1) < 1.6 1.8 +/- 1.1 07/01/19 - 07/31/19 (1) < 1.8 (1) 2.5 +/- 1.3 2.9 +/- 1.3 08/06/19 - 08/28/19 (1) < 1.9 (1) 1.6 +/- 1.1 2.9 +/- 1.2 09/04/19 - 09/26/19 (1) < 1.8 (1) 2.3 +/- 1.2 3.1 +/- 1.2 10/02/19 - 10/30/19 (1) 2.9 +/- 1.4 (1) 1.8 +/- 1.2 2.7 +/- 1.3 11/05/19 - 11/29/19 (1) < 1.7 (1) 5.3 +/- 1.4 4.3 +/- 1.4 12/04/19 - 01/02/20 (1) < 1.6 (1) 1.7 +/- 1.1 2.1 +/- 1.1 MEAN +/- 2 STD DEV 3.8 +/- 0.9 7.7 +/- 9.0 - 2.5 +/- 2.5 2.6 +/- 1.4 Table C-II.3 CONCENTRATIONS OF I-131 IN DRINKING WATER SAMPLES COLLECTED IN THE VICINITY OF OYSTER CREEK GENERATING STATION, 2019 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION PERIOD 114 1N 1S 37 38 01/07/19 - 01/31/19 < 0.6 < 0.6 (1) < 0.7 < 0.4 02/04/19 - 03/06/19 < 0.7 < 0.4 (1) < 0.7 < 0.7 03/06/19 - 03/27/19 < 0.5 < 0.6 (1) < 0.5 < 0.8 04/01/19 - 05/01/19 < 0.9 < 0.5 (1) < 0.5 < 0.5 05/06/19 - 05/31/19 (1) < 0.7 (1) < 0.6 < 0.8 06/04/19 - 06/26/19 (1) < 0.9 (1) < 0.8 < 0.7 07/01/19 - 07/31/19 (1) < 0.9 (1) < 0.7 < 0.7 08/06/19 - 08/28/19 (1) < 0.8 (1) < 0.8 < 0.8 09/04/19 - 09/26/19 (1) < 1.0 (1) < 0.9 < 0.8 10/02/19 - 10/30/19 (1) < 0.9 (1) < 0.7 < 0.8 11/05/19 - 11/29/19 (1) < 0.9 (1) < 0.9 < 0.7 12/04/19 - 01/02/20 (1) < 0.5 (1) < 0.5 < 0.8 MEAN - - - - -

THE MEAN AND TWO STANDARD DEVIATION ARE CALCULATED USING THE POSITIVE VALUES (1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION C-3 2019 OCGS AREOR

Table C-II.4 CONCENTRATIONS OF GAMMA EMITTERS IN DRINKING WATER SAMPLES COLLECTED IN THE VICINITY OF OYSTER CREEK GENERATING STATION, 2019 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE PERIOD Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140 La-140 114 01/07/19 - 01/28/19 < 4 < 5 < 11 < 5 < 9 < 6 < 11 < 6 < 5 < 29 < 8 02/05/19 - 02/27/19 < 7 < 7 < 13 < 7 < 15 < 7 < 13 < 7 < 8 < 37 < 10 03/07/19 - 03/26/19 < 5 < 5 < 10 < 4 < 11 < 5 < 10 < 7 < 6 < 24 < 8 04/01/19 - 04/17/19 < 2 < 2 < 5 < 2 < 4 < 2 < 4 < 2 < 2 < 19 < 5 05/06/19 - 05/31/19 (1) - - - - - - - - - - -

06/04/19 - 06/26/19 (1) - - - - - - - - - - -

07/01/19 - 07/31/19 (1) - - - - - - - - - - -

08/06/19 - 08/28/19 (1) - - - - - - - - - - -

09/04/19 - 09/26/19 (1) - - - - - - - - - - -

10/02/19 - 10/30/19 (1) - - - - - - - - - - -

11/05/19 - 11/29/19 (1) - - - - - - - - - - -

12/04/19 - 01/02/20 (1) - - - - - - - - - - -

MEAN - - - - - - - - - - -

1N 01/07/19 - 01/28/19 < 4 < 6 < 11 < 4 < 11 < 4 < 10 < 5 < 5 < 29 < 8 02/04/19 - 03/06/19 < 2 < 2 < 4 < 2 < 3 < 2 < 3 < 2 < 2 < 7 < 3 03/06/19 - 03/27/19 < 7 < 8 < 12 < 8 < 16 < 7 < 14 < 8 < 7 < 28 < 14 C-4 04/01/19 - 05/01/19 < 4 < 3 < 8 < 3 < 8 < 3 < 6 < 4 < 4 < 21 < 6 05/06/19 - 05/29/19 < 4 < 5 < 11 < 6 < 12 < 6 < 11 < 7 < 7 < 28 < 6 06/05/19 - 06/26/19 < 5 < 5 < 9 < 6 < 11 < 6 < 9 < 6 < 5 < 28 < 10 07/03/19 - 07/29/19 < 4 < 6 < 11 < 8 < 11 < 7 < 7 < 5 < 6 < 29 < 10 08/07/19 - 08/28/19 < 4 < 5 < 10 < 4 < 8 < 5 < 9 < 5 < 4 < 30 < 9 09/04/19 - 09/26/19 < 5 < 4 < 13 < 5 < 11 < 5 < 10 < 5 < 6 < 27 < 10 10/03/19 - 10/30/19 < 3 < 4 < 9 < 4 < 7 < 4 < 6 < 4 < 4 < 27 < 10 11/06/19 - 11/27/19 < 6 < 6 < 11 < 6 < 13 < 6 < 9 < 7 < 5 < 34 < 9 12/04/19 - 01/02/20 < 7 < 5 < 9 < 6 < 9 < 6 < 11 < 7 < 6 < 25 < 6 MEAN - - - - - - - - - - -

1S 01/07/19 - 01/31/19 (1) - - - - - - - - - - -

02/04/19 - 02/28/19 (1) - - - - - - - - - - -

03/06/19 - 03/27/19 (1) - - - - - - - - - - -

04/01/19 - 05/01/19 (1) - - - - - - - - - - -

05/06/19 - 05/31/19 (1) - - - - - - - - - - -

06/04/19 - 06/26/19 (1) - - - - - - - - - - -

07/01/19 - 07/31/19 (1) - - - - - - - - - - -

08/06/19 - 08/28/19 (1) - - - - - - - - - - -

09/04/19 - 09/26/19 (1) - - - - - - - - - - -

10/02/19 - 10/30/19 (1) - - - - - - - - - - -

11/05/19 - 11/29/19 (1) - - - - - - - - - - -

2019 OCGS AREOR 12/04/19 - 01/02/20 (1) - - - - - - - - - - -

MEAN - - - - - - - - - - -

(1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION

Table C-II.4 CONCENTRATIONS OF GAMMA EMITTERS IN DRINKING WATER SAMPLES COLLECTED IN THE VICINITY OF OYSTER CREEK GENERATING STATION, 2019 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE PERIOD Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140 La-140 37 01/07/19 - 01/28/19 < 6 < 7 < 12 < 5 < 12 < 6 < 9 < 6 < 6 < 31 < 10 02/06/19 - 02/27/19 < 7 < 7 < 15 < 7 < 16 < 8 < 13 < 7 < 7 < 35 < 12 03/06/19 - 03/26/19 < 7 < 7 < 16 < 8 < 11 < 9 < 12 < 10 < 7 < 42 < 14 04/01/19 - 05/01/19 < 5 < 4 < 6 < 5 < 10 < 5 < 8 < 5 < 5 < 19 < 6 05/07/19 - 05/31/19 < 4 < 5 < 12 < 6 < 11 < 5 < 11 < 5 < 5 < 36 < 11 06/04/19 - 06/26/19 < 5 < 5 < 10 < 7 < 11 < 5 < 12 < 4 < 7 < 29 < 6 07/01/19 - 07/31/19 < 7 < 4 < 17 < 7 < 13 < 9 < 13 < 7 < 9 < 29 < 13 08/06/19 - 08/27/19 < 7 < 7 < 14 < 8 < 13 < 4 < 10 < 7 < 6 < 29 < 9 09/05/19 - 09/24/19 < 4 < 4 < 9 < 4 < 10 < 4 < 7 < 5 < 4 < 21 < 7 10/04/19 - 10/28/19 < 3 < 3 < 8 < 4 < 7 < 4 < 6 < 4 < 3 < 16 < 6 11/05/19 - 11/25/19 < 5 < 6 < 12 < 8 < 13 < 6 < 11 < 7 < 6 < 30 < 10 12/06/19 - 01/02/20 < 7 < 7 < 11 < 8 < 14 < 7 < 10 < 8 < 7 < 26 < 9 MEAN - - - - - - - - - - -

38 01/09/19 - 01/31/19 < 6 < 6 < 13 < 7 < 16 < 8 < 10 < 7 < 7 < 29 < 14 02/06/19 - 02/28/19 < 9 < 7 < 15 < 8 < 18 < 8 < 14 < 8 < 9 < 38 < 11 03/06/19 - 03/20/19 < 5 < 5 < 12 < 7 < 12 < 5 < 9 < 5 < 5 < 35 < 9 C-5 04/03/19 - 05/01/19 < 5 < 6 < 12 < 6 < 11 < 7 < 9 < 7 < 7 < 28 < 8 05/09/19 - 05/31/19 < 8 < 8 < 16 < 7 < 17 < 8 < 12 < 8 < 8 < 36 < 8 06/05/19 - 06/26/19 < 5 < 4 < 14 < 7 < 10 < 7 < 12 < 7 < 6 < 27 < 8 07/02/19 - 07/31/19 < 7 < 6 < 13 < 9 < 9 < 7 < 12 < 7 < 7 < 29 < 14 08/07/19 - 08/28/19 < 8 < 8 < 14 < 9 < 18 < 8 < 13 < 9 < 7 < 41 < 13 09/11/19 - 09/24/19 < 4 < 4 < 11 < 5 < 7 < 4 < 8 < 5 < 5 < 21 < 9 10/02/19 - 10/29/19 < 4 < 5 < 10 < 4 < 11 < 5 < 8 < 5 < 5 < 23 < 7 11/06/19 - 11/29/19 < 2 < 2 < 4 < 2 < 4 < 2 < 3 < 2 < 2 < 15 < 4 12/06/19 - 01/02/20 < 6 < 6 < 14 < 6 < 12 < 6 < 9 < 7 < 6 < 28 < 8 MEAN - - - - - - - - - - -

2019 OCGS AREOR

Table C-III.1 CONCENTRATIONS OF TRITIUM IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF OYSTER CREEK GENERATING STATION, 2019 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION PERIOD MW-24-3A W-3C 01/16/19 - 01/16/19 < 191 < 193 04/17/19 - 04/17/19 < 189 < 186 07/23/19 - 07/23/19 < 183 < 184 10/09/19 - 10/09/19 < 178 < 182 MEAN - -

C-6 2019 OCGS AREOR

Table C-III.2 CONCENTRATIONS OF GAMMA EMITTERS IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF OYSTER CREEK GENERATING STATION, 2019 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE PERIOD Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 I-131 Cs-134 Cs-137 Ba-140 La-140 MW-24-3A 01/16/19 - 01/16/19 < 6 < 6 < 11 < 4 < 10 < 6 < 10 < 8 < 6 < 6 < 25 < 9 04/17/19 - 04/17/19 < 6 < 7 < 12 < 6 < 14 < 6 < 10 < 12 < 6 < 6 < 29 < 8 07/23/19 - 07/23/19 < 8 < 7 < 15 < 10 < 14 < 7 < 12 < 15 < 9 < 7 < 39 < 10 10/09/19 - 10/09/19 < 9 < 9 < 15 < 8 < 25 < 9 < 14 < 12 < 10 < 8 < 40 < 11 MEAN - - - - - - - - - - - -

W-3C 01/16/19 - 01/16/19 < 5 < 4 < 11 < 6 < 13 < 5 < 11 < 7 < 6 < 7 < 26 < 6 04/17/19 - 04/17/19 < 7 < 6 < 15 < 8 < 10 < 5 < 11 < 12 < 9 < 7 < 32 < 11 07/23/19 - 07/23/19 < 6 < 6 < 14 < 8 < 14 < 7 < 15 < 13 < 8 < 7 < 30 < 15 10/09/19 - 10/09/19 < 5 < 8 < 9 < 4 < 17 < 8 < 15 < 11 < 9 < 6 < 29 < 14 MEAN - - - - - - - - - - - -

C-7 2019 OCGS AREOR

Table C-IV.1 CONCENTRATIONS OF GAMMA EMITTERS IN PREDATOR AND BOTTOM FEEDER (FISH)

SAMPLES COLLECTED IN THE VICINITY OF OYSTER CREEK GENERATING STATION, 2019 RESULTS IN UNITS OF PCI/KG WET +/- 2 SIGMA COLLECTION SITE PERIOD K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Cs-134 Cs-137 33 PREDATOR 09/27/19 4070 +/- 1285 < 82 < 89 < 187 < 100 < 209 < 96 < 81 MEAN +/- 2 STD DEV 4070 +/- 0 - - - - - - -

33 BOTTOM FEEDER 06/04/19 3482 +/- 1226 < 70 < 93 < 162 < 83 < 151 < 87 < 76 06/04/19 2495 +/- 760 < 43 < 48 < 100 < 43 < 78 < 45 < 50 09/27/19 4717 +/- 1215 < 66 < 72 < 119 < 84 < 137 < 66 < 83 09/27/19 2467 +/- 726 < 43 < 50 < 119 < 57 < 89 < 50 < 37 MEAN +/- 2 STD DEV 3290 +/- 2124 - - - - - - -

93 PREDATOR 06/05/19 5932 +/- 1522 < 90 < 80 < 196 < 76 < 201 < 88 < 90 06/05/19 4241 +/- 1036 < 36 < 45 < 70 < 25 < 92 < 50 < 51 C-8 09/27/19 (1)

MEAN +/- 2 STD DEV 5087 +/- 2391 - - - - - - -

93 BOTTONFEEDER 06/05/19 (1) 09/27/19 (1) 94 PREDATOR 06/05/19 (1) 09/27/19 (1) 94 BOTTONFEEDER 06/05/19 (1) 09/27/19 (1) 2019 OCGS AREOR THE MEAN AND TWO STANDARD DEVIATION ARE CALCULATED USING THE POSITIVE VALUES (1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION

Table C-IV.2 CONCENTRATIONS OF GAMMA EMITTERS IN CLAM AND CRAB SAMPLES COLLECTED IN THE VICINITY OF OYSTER CREEK GENERATING STATION, 2019 RESULTS IN UNITS OF PCI/KG WET +/- 2 SIGMA COLLECTION SITE PERIOD K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Cs-134 Cs-137 23 Clams 06/03/19 1155 +/- 716 < 37 < 42 < 86 < 65 < 82 < 54 < 39 10/01/19 1041 +/- 641 < 45 < 41 < 95 < 47 < 93 < 51 < 44 MEAN +/- 2 STD DEV 1098 +/- 161 - - - - - - -

24 Clams 06/03/19 1475 +/- 929 < 62 < 51 < 110 < 70 < 87 < 31 < 57 09/30/19 1097 +/- 546 < 41 < 40 < 69 < 38 < 73 < 41 < 42 MEAN +/- 2 STD DEV 1286 +/- 535 - - - - - - -

33 C-9 Crabs 09/27/19 2731 +/- 907 < 69 < 57 < 92 < 53 < 132 < 72 < 61 MEAN +/- 2 STD DEV 2731 +/- 0 - - - - - - -

93 Crabs 09/27/19 2587 +/- 1246 < 67 < 63 < 147 < 83 < 156 < 86 < 84 MEAN +/- 2 STD DEV 2587 +/- 0 - - - - - - -

94 Clams 06/05/19 1704 +/- 831 < 47 < 47 < 89 < 42 < 125 < 47 < 42 10/02/19 1288 +/- 804 < 56 < 45 < 88 < 60 < 114 < 62 < 50 MEAN +/- 2 STD DEV 1496 +/- 588 - - - - - - -

2019 OCGS AREOR THE MEAN AND TWO STANDARD DEVIATION ARE CALCULATED USING THE POSITIVE VALUES

Table C-V.1 CONCENTRATIONS OF GAMMA EMITTERS IN SEDIMENT SAMPLES COLLECTED IN THE VICINITY OF OYSTER CREEK GENERATING STATION, 2019 RESULTS IN UNITS OF PCI/KG DRY +/- 2 SIGMA COLLECTION SITE PERIOD Be-7 K-40 Mn-54 Co-58 Co-60 Cs-134 Cs-137 Ra-226 Th-228 23 06/03/19 < 339 1571 +/- 566 < 35 < 40 < 40 < 43 < 39 < 728 249 +/- 61 10/01/19 < 926 10500 +/- 1813 < 110 < 95 < 99 < 98 < 108 < 1811 570 +/- 170 MEAN +/- 2 STD DEV - 6036 +/- 12628 - - - - - - 409 +/- 454 24 06/03/19 < 695 18160 +/- 1586 < 83 < 64 < 83 < 88 < 79 < 1931 866 +/- 144 09/30/19 < 677 16160 +/- 2025 < 96 < 69 < 92 < 103 < 74 < 1455 745 +/- 179 MEAN +/- 2 STD DEV - 17160 +/- 2828 - - - - - - 806 +/- 171 33 06/04/19 < 252 2636 +/- 583 < 38 < 34 < 30 < 49 < 43 866 +/- 702 331 +/- 59 09/30/19 < 446 1010 +/- 546 < 56 < 51 < 53 < 56 < 55 < 1112 110 +/- 91 C-10 MEAN +/- 2 STD DEV - 1823 +/- 2300 - - - - - 866 +/- 0 220 +/- 313 94 06/05/19 < 538 17300 +/- 1633 < 60 < 62 < 63 < 85 < 57 < 1463 642 +/- 122 10/01/19 < 731 15000 +/- 1775 < 94 < 104 < 91 < 110 < 106 < 1987 < 231 MEAN +/- 2 STD DEV - 16150 +/- 3253 - - - - - - 642 +/- 0 2019 OCGS AREOR THE MEAN AND TWO STANDARD DEVIATION ARE CALCULATED USING THE POSITIVE VALUES

Table C-VI.1 CONCENTRATIONS OF GROSS BETA IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF OYSTER CREEK GENERATING STATION, 2019 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA COLLECTION GROUP I GROUP II GROUP III PERIOD 20 66 111 71 72 73 3 C 01/02/19 - 01/09/19 (1) 12 +/- 5 16 +/- 5 15 +/- 5 19 +/- 5 11 +/- 5 13 +/- 5 17 +/- 5 01/09/19 - 01/16/19 (1) 9 +/- 4 7 +/- 4 6 +/- 4 10 +/- 4 7 +/- 4 8 +/- 4 9 +/- 5 01/16/19 - 01/23/19 50 +/- 16 15 +/- 4 12 +/- 4 14 +/- 4 15 +/- 4 15 +/- 5 14 +/- 4 11 +/- 4 01/23/19 - 01/31/19 15 +/- 4 15 +/- 4 17 +/- 4 16 +/- 4 16 +/- 4 17 +/- 4 14 +/- 4 15 +/- 4 01/31/19 - 02/06/19 18 +/- 5 17 +/- 5 15 +/- 5 17 +/- 5 15 +/- 5 22 +/- 5 21 +/- 5 22 +/- 5 02/06/19 - 02/14/19 8 +/- 4 9 +/- 4 10 +/- 4 6 +/- 3 9 +/- 3 (1) 6 +/- 3 12 +/- 4 02/14/19 - 02/21/19 13 +/- 4 15 +/- 4 12 +/- 4 14 +/- 4 14 +/- 4 13 +/- 5 17 +/- 5 14 +/- 5 02/21/19 - 02/27/19 20 +/- 6 15 +/- 5 16 +/- 5 15 +/- 5 20 +/- 6 13 +/- 5 14 +/- 5 19 +/- 6 02/27/19 - 03/06/19 15 +/- 4 13 +/- 4 11 +/- 4 17 +/- 5 13 +/- 5 12 +/- 4 16 +/- 5 15 +/- 5 03/06/19 - 03/13/19 12 +/- 4 8 +/- 4 9 +/- 4 < 6 7 +/- 4 7 +/- 4 11 +/- 4 7 +/- 4 03/13/19 - 03/20/19 21 +/- 5 18 +/- 4 21 +/- 4 23 +/- 5 21 +/- 5 27 +/- 5 8 +/- 4 25 +/- 5 03/20/19 - 03/27/19 9 +/- 4 11 +/- 4 6 +/- 4 11 +/- 4 9 +/- 4 6 +/- 4 8 +/- 4 14 +/- 5 03/27/19 - 04/03/19 11 +/- 5 10 +/- 4 9 +/- 4 10 +/- 5 8 +/- 5 7 +/- 4 8 +/- 4 9 +/- 5 04/03/19 - 04/09/19 9 +/- 5 7 +/- 5 11 +/- 5 7 +/- 5 10 +/- 5 8 +/- 5 < 7 11 +/- 6 04/09/19 - 04/17/19 8 +/- 4 6 +/- 3 8 +/- 3 13 +/- 4 7 +/- 4 7 +/- 4 < 5 11 +/- 4 04/17/19 - 04/24/19 11 +/- 5 9 +/- 4 6 +/- 4 8 +/- 4 9 +/- 5 7 +/- 4 7 +/- 4 (1) 04/24/19 - 05/01/19 6 +/- 4 7 +/- 4 11 +/- 4 11 +/- 4 12 +/- 4 9 +/- 4 8 +/- 4 8 +/- 4 05/01/19 - 05/09/19 6 +/- 4 6 +/- 4 8 +/- 4 8 +/- 4 < 6 < 5 < 5 7 +/- 4 05/09/19 - 05/15/19 < 7 < 7 7 +/- 4 < 7 < 7 < 7 8 +/- 5 < 8 05/15/19 - 05/21/19 22 +/- 6 19 +/- 6 21 +/- 5 25 +/- 6 22 +/- 6 16 +/- 5 18 +/- 5 20 +/- 6 05/21/19 - 05/29/19 9 +/- 4 10 +/- 4 8 +/- 4 11 +/- 6 9 +/- 4 9 +/- 4 8 +/- 4 8 +/- 4 05/29/19 - 06/05/19 12 +/- 4 9 +/- 4 9 +/- 4 9 +/- 4 12 +/- 4 6 +/- 4 < 6 11 +/- 4 06/05/19 - 06/12/19 11 +/- 5 8 +/- 5 10 +/- 4 10 +/- 5 9 +/- 5 10 +/- 5 7 +/- 4 11 +/- 5 06/12/19 - 06/19/19 8 +/- 4 8 +/- 4 7 +/- 4 7 +/- 4 9 +/- 4 8 +/- 4 7 +/- 4 (1) 06/19/19 - 06/25/19 < 7 7 +/- 5 9 +/- 5 10 +/- 5 < 7 < 7 8 +/- 5 15 +/- 8 06/25/19 - 07/02/19 19 +/- 4 19 +/- 5 15 +/- 4 12 +/- 4 15 +/- 4 8 +/- 4 14 +/- 4 16 +/- 4 07/02/19 - 07/10/19 11 +/- 4 7 +/- 3 11 +/- 3 14 +/- 4 9 +/- 4 9 +/- 3 10 +/- 3 13 +/- 4 07/10/19 - 07/16/19 10 +/- 5 8 +/- 5 9 +/- 5 < 7 < 8 10 +/- 5 < 8 < 8 07/16/19 - 07/24/19 12 +/- 4 12 +/- 5 10 +/- 4 12 +/- 4 11 +/- 4 12 +/- 4 13 +/- 4 14 +/- 5 07/24/19 - 07/30/19 15 +/- 5 14 +/- 4 14 +/- 4 10 +/- 4 12 +/- 4 15 +/- 5 12 +/- 4 14 +/- 5 07/30/19 - 08/07/19 15 +/- 5 13 +/- 5 15 +/- 5 14 +/- 5 10 +/- 5 13 +/- 5 7 +/- 4 17 +/- 5 08/07/19 - 08/15/19 18 +/- 4 18 +/- 4 13 +/- 4 13 +/- 4 18 +/- 4 11 +/- 4 8 +/- 4 17 +/- 4 08/15/19 - 08/21/19 12 +/- 6 15 +/- 6 11 +/- 5 < 8 9 +/- 6 < 8 11 +/- 5 14 +/- 6 08/21/19 - 08/27/19 11 +/- 5 9 +/- 5 9 +/- 5 < 7 9 +/- 5 12 +/- 5 < 8 16 +/- 6 08/27/19 - 09/04/19 11 +/- 4 9 +/- 4 9 +/- 4 7 +/- 4 13 +/- 4 12 +/- 4 9 +/- 4 15 +/- 4 09/04/19 - 09/11/19 20 +/- 5 15 +/- 5 15 +/- 4 11 +/- 4 17 +/- 5 8 +/- 4 11 +/- 4 17 +/- 5 09/11/19 - 09/18/19 (1) 13 +/- 5 10 +/- 4 12 +/- 5 14 +/- 5 11 +/- 5 10 +/- 4 20 +/- 5 09/18/19 - 09/24/19 17 +/- 5 15 +/- 5 12 +/- 5 12 +/- 5 14 +/- 5 10 +/- 5 7 +/- 4 20 +/- 5 09/24/19 - 10/02/19 11 +/- 4 16 +/- 4 17 +/- 4 13 +/- 4 15 +/- 5 14 +/- 4 8 +/- 4 19 +/- 5 10/02/19 - 10/09/19 7 +/- 4 6 +/- 4 7 +/- 4 8 +/- 4 < 7 < 6 < 6 9 +/- 5 10/09/19 - 10/17/19 13 +/- 4 13 +/- 4 11 +/- 4 13 +/- 4 11 +/- 4 14 +/- 4 11 +/- 4 13 +/- 4 10/17/19 - 10/23/19 14 +/- 5 12 +/- 4 9 +/- 4 10 +/- 4 11 +/- 5 7 +/- 4 7 +/- 4 14 +/- 5 10/23/19 - 10/29/19 13 +/- 5 12 +/- 5 10 +/- 5 12 +/- 5 < 7 9 +/- 5 9 +/- 5 11 +/- 5 10/29/19 - 11/05/19 < 5 7 +/- 4 < 5 < 5 7 +/- 4 6 +/- 4 < 5 11 +/- 4 11/05/19 - 11/13/19 19 +/- 4 16 +/- 4 16 +/- 4 20 +/- 4 10 +/- 4 16 +/- 4 16 +/- 4 14 +/- 4 11/13/19 - 11/20/19 10 +/- 4 15 +/- 5 11 +/- 4 10 +/- 4 10 +/- 5 10 +/- 4 12 +/- 5 14 +/- 5 11/20/19 - 11/26/19 15 +/- 5 12 +/- 5 15 +/- 5 12 +/- 5 10 +/- 5 19 +/- 6 15 +/- 5 11 +/- 5 11/26/19 - 12/04/19 9 +/- 4 7 +/- 4 7 +/- 3 < 5 8 +/- 4 < 5 8 +/- 4 13 +/- 4 12/04/19 - 12/11/19 13 +/- 5 9 +/- 5 11 +/- 5 11 +/- 5 14 +/- 5 9 +/- 5 11 +/- 5 13 +/- 5 12/11/19 - 12/18/19 12 +/- 5 8 +/- 4 11 +/- 4 < 6 11 +/- 5 < 6 9 +/- 4 12 +/- 5 12/18/19 - 12/26/19 24 +/- 5 21 +/- 5 24 +/- 5 17 +/- 4 17 +/- 5 22 +/- 5 19 +/- 5 21 +/- 5 12/26/19 - 01/02/20 13 +/- 5 15 +/- 5 14 +/- 4 14 +/- 5 8 +/- 4 13 +/- 5 7 +/- 4 17 +/- 5 MEAN +/- 2 STD DEV 14 +/- 14 12 +/- 8 12 +/- 8 12 +/- 8 12 +/- 8 12 +/- 9 11 +/- 8 14 +/- 8 13 12 THE MEAN AND TWO STANDARD DEVIATION ARE CALCULATED USING THE POSITIVE VALUES (1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION C-11 2019 OCGS AREOR

Table C-VI.2 MONTHLY AND YEARLY MEAN VALUES OF GROSS BETA CONCENTRATIONS IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF OYSTER CREEK GENERATING STATION, 2019 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA GROUP I - ON-SITE LOCATIONS GROUP II - INTERMEDIATE DISTANCE LOCATIONS GROUP III - CONTROL LOCATIONS COLLECTION MEAN COLLECTION MEAN COLLECTION MEAN PERIOD MIN MAX +/- 2SD PERIOD MIN MAX +/- 2SD PERIOD MIN MAX +/- 2SD 01/02/19 - 01/31/19 7 50 17 +/- 24 01/02/19 - 01/31/19 6 19 13 +/- 8 01/02/19 - 01/31/19 8 17 13 +/- 6 01/31/19 - 02/27/19 8 20 14 +/- 7 01/31/19 - 02/27/19 6 22 14 +/- 9 01/31/19 - 02/27/19 6 22 16 +/- 10 02/27/19 - 04/03/19 6 21 12 +/- 9 02/27/19 - 04/03/19 6 27 13 +/- 13 02/27/19 - 04/03/19 7 25 12 +/- 11 04/03/19 - 05/01/19 6 11 8 +/- 4 04/03/19 - 05/01/19 7 13 9 +/- 4 04/03/19 - 05/01/19 7 11 9 +/- 4 05/01/19 - 05/29/19 6 22 12 +/- 13 05/01/19 - 05/29/19 8 25 14 +/- 14 05/01/19 - 05/29/19 7 20 11 +/- 12 05/29/19 - 07/02/19 7 19 11 +/- 8 05/29/19 - 07/02/19 6 15 10 +/- 5 05/29/19 - 07/02/19 7 16 11 +/- 7 07/02/19 - 07/30/19 7 15 11 +/- 5 07/02/19 - 07/30/19 9 15 11 +/- 4 07/02/19 - 07/30/19 10 14 13 +/- 3 07/30/19 - 09/04/19 9 18 13 +/- 6 07/30/19 - 09/04/19 7 18 12 +/- 5 07/30/19 - 09/04/19 7 17 13 +/- 8 09/04/19 - 10/02/19 10 20 15 +/- 6 09/04/19 - 10/02/19 8 17 13 +/- 5 09/04/19 - 10/02/19 7 20 14 +/- 11 C-12 10/02/19 - 10/29/19 6 14 11 +/- 5 10/02/19 - 10/29/19 7 14 11 +/- 5 10/02/19 - 10/29/19 7 14 10 +/- 5 10/29/19 - 12/04/19 7 19 12 +/- 8 10/29/19 - 12/04/19 6 20 11 +/- 9 10/29/19 - 12/04/19 8 16 13 +/- 5 12/04/19 - 01/02/20 8 24 15 +/- 11 12/04/19 - 01/02/20 8 22 13 +/- 8 12/04/19 - 01/02/20 7 21 13 +/- 10 01/02/19 - 01/02/20 6 50 12 +/- 10 01/02/19 - 01/02/20 6 27 12 +/- 8 01/02/19 - 01/02/20 6 25 12 +/- 9 2019 OCGS AREOR THE MEAN AND TWO STANDARD DEVIATION ARE CALCULATED USING THE POSITIVE VALUES

Table C-VI.3 CONCENTRATIONS OF STRONTIUM IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF OYSTER CREEK GENERATING STATION, 2019 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA COLLECTION SITE PERIOD SR-89 SR-90 3 01/03/18 - 03/28/18 < 6 < 5 03/28/18 - 07/03/18 < 4 < 4 07/03/18 - 10/03/18 < 6 < 4 10/03/18 - 01/02/19 < 5 < 7 MEAN - -

20 01/11/18 - 03/28/18 < 8 < 6 03/28/18 - 07/03/18 < 5 < 4 07/03/18 - 10/03/18 < 6 < 3 10/03/18 - 12/27/18 < 9 < 8 MEAN - -

66 01/03/18 - 03/28/18 < 6 < 4 03/28/18 - 07/03/18 < 5 < 5 07/11/18 - 10/03/18 < 7 < 4 10/03/18 - 01/02/19 < 5 < 5 MEAN - -

71 01/03/18 - 03/28/18 < 6 < 5 03/28/18 - 07/03/18 < 5 < 4 07/03/18 - 10/03/18 < 5 < 3 10/03/18 - 01/02/19 < 7 < 9 MEAN - -

72 01/03/18 - 03/28/18 < 5 < 5 03/28/18 - 07/03/18 < 6 < 7 07/03/18 - 10/03/18 < 6 < 4 10/03/18 - 01/02/19 < 7 < 10 MEAN - -

73 01/11/18 - 03/28/18 < 9 < 7 03/28/18 - 07/03/18 < 6 < 7 07/03/18 - 10/03/18 < 6 < 3 10/03/18 - 01/02/19 < 6 < 6 MEAN - -

111 01/03/18 - 03/28/18 < 6 < 6 03/28/18 - 07/03/18 < 5 < 5 07/03/18 - 10/03/18 < 7 < 4 10/03/18 - 01/02/19 < 6 < 5 MEAN - -

C 01/03/18 - 03/28/18 < 6 < 5 03/28/18 - 07/03/18 < 6 < 5 07/03/18 - 10/03/18 < 6 < 3 10/03/18 - 01/02/19 < 6 < 9 MEAN - -

C-13 2019 OCGS AREOR

Table C-VI.4 CONCENTRATIONS OF GAMMA EMITTERS IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF OYSTER CREEK GENERATING STATION, 2019 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA COLLECTION SITE PERIOD Be-7 Mn-54 Co-58 Co-60 Cs-134 Cs-137 3 01/02/19 - 04/03/19 71 +/- 12 < 2 < 2 < 2 < 2 < 2 04/03/19 - 07/02/19 44 +/- 14 < 3 < 3 < 3 < 3 < 2 07/02/19 - 10/02/19 47 +/- 13 < 2 < 2 < 2 < 2 < 2 10/02/19 - 01/02/20 39 +/- 13 < 2 < 3 < 2 < 2 < 2 MEAN +/- 2 STD DEV 50 +/- 28 - - - - -

20 01/16/19 - 04/03/19 98 +/- 16 < 2 < 2 < 2 < 2 < 2 04/03/19 - 07/02/19 79 +/- 24 < 2 < 2 < 3 < 2 < 2 07/02/19 - 10/02/19 64 +/- 22 < 2 < 2 < 1 < 2 < 2 10/02/19 - 01/02/20 42 +/- 18 < 2 < 2 < 3 < 3 < 3 MEAN +/- 2 STD DEV 71 +/- 47 - - - - -

66 01/02/19 - 04/03/19 87 +/- 15 < 2 < 2 < 2 < 2 < 2 04/03/19 - 07/02/19 113 +/- 20 < 2 < 2 < 2 < 2 < 2 07/02/19 - 10/02/19 65 +/- 15 < 2 < 3 < 3 < 2 < 2 10/02/19 - 01/02/20 47 +/- 17 < 2 < 2 < 3 < 2 < 2 78 +/- 57 - - - - -

71 01/02/19 - 04/03/19 58 +/- 10 < 1 < 1 < 2 < 1 < 1 04/03/19 - 07/02/19 58 +/- 24 < 3 < 3 < 3 < 2 < 3 07/02/19 - 10/02/19 54 +/- 16 < 2 < 3 < 2 < 2 < 2 10/02/19 - 01/02/20 36 +/- 13 < 2 < 2 < 2 < 2 < 2 MEAN +/- 2 STD DEV 52 +/- 21 - - - - -

72 01/02/19 - 04/03/19 82 +/- 13 < 1 < 1 < 1 < 2 < 1 04/03/19 - 07/02/19 52 +/- 22 < 2 < 3 < 3 < 3 < 2 07/02/19 - 10/02/19 57 +/- 17 < 2 < 3 < 2 < 3 < 3 10/02/19 - 01/02/20 27 +/- 12 < 2 < 2 < 2 < 2 < 2 50 +/- 42 - - - - -

73 01/02/19 - 04/03/19 62 +/- 16 < 2 < 2 < 2 < 2 < 2 04/03/19 - 07/02/19 52 +/- 26 < 2 < 3 < 4 < 2 < 2 07/02/19 - 10/02/19 56 +/- 23 < 3 < 2 < 2 < 3 < 2 10/02/19 - 01/02/20 44 +/- 12 < 2 < 2 < 2 < 2 < 2 MEAN +/- 2 STD DEV 54 +/- 15 - - - - -

111 01/02/19 - 04/03/19 72 +/- 15 < 2 < 2 < 2 < 2 < 2 04/03/19 - 07/02/19 81 +/- 23 < 2 < 3 < 4 < 3 < 3 07/02/19 - 10/02/19 52 +/- 16 < 2 < 2 < 2 < 2 < 3 10/02/19 - 01/02/20 41 +/- 14 < 2 < 2 < 2 < 2 < 2 MEAN +/- 2 STD DEV 61 +/- 37 - - - - -

C 01/02/19 - 04/03/19 90 +/- 20 < 2 < 3 < 3 < 2 < 2 04/03/19 - 07/02/19 74 +/- 33 < 4 < 4 < 3 < 3 < 4 07/02/19 - 10/02/19 89 +/- 19 < 2 < 2 < 2 < 2 < 2 10/02/19 - 01/02/20 48 +/- 23 < 3 < 4 < 5 < 3 < 4 MEAN +/- 2 STD DEV 75 +/- 39 - - - - -

THE MEAN AND TWO STANDARD DEVIATION ARE CALCULATED USING THE POSITIVE VALUES C-14 2019 OCGS AREOR

Table C-VII.1 CONCENTRATIONS OF I-131 IN AIR IODINE SAMPLES COLLECTED IN THE VICINITY OF OYSTER CREEK GENERATING STATION, 2019 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA COLLECTION GROUP I GROUP II GROUP III PERIOD 20 66 111 71 72 73 3 C 01/02/19 - 01/09/19 (1) < 46 < 46 < 19 < 44 < 47 < 18 < 23 01/09/19 - 01/16/19 (1) < 30 < 30 < 25 < 28 < 30 < 38 < 41 01/16/19 - 01/23/19 < 46 < 28 < 28 < 27 < 5 < 29 < 12 < 46 01/23/19 - 01/31/19 < 39 < 38 < 38 < 37 < 36 < 39 < 36 < 39 01/31/19 - 02/06/19 < 35 < 33 < 34 < 28 < 56 < 34 < 22 < 56 02/06/19 - 02/14/19 < 23 < 22 < 22 < 18 < 21 (1) < 15 < 38 02/14/19 - 02/21/19 < 50 < 39 < 40 < 39 < 46 < 47 < 48 < 52 02/21/19 - 02/27/19 < 42 < 53 < 51 < 53 < 45 < 54 < 43 < 46 02/27/19 - 03/06/19 < 30 < 32 < 26 < 32 < 32 < 32 < 30 < 30 03/06/19 - 03/13/19 < 40 < 27 < 11 < 27 < 43 < 27 < 41 < 45 03/13/19 - 03/20/19 < 32 < 39 < 37 < 38 < 35 < 39 < 33 < 35 03/20/19 - 03/27/19 < 47 < 41 < 39 < 41 < 51 < 41 < 48 < 51 03/27/19 - 04/03/19 < 28 < 46 < 16 < 46 < 30 < 47 < 28 < 28 04/03/19 - 04/09/19 < 63 < 64 < 61 < 27 < 45 < 64 < 37 < 48 04/09/19 - 04/17/19 < 42 < 35 < 34 < 35 < 44 < 36 < 41 < 42 04/17/19 - 04/24/19 < 59 < 60 < 20 < 59 < 45 < 59 < 42 (1) 04/24/19 - 05/01/19 < 47 < 48 < 45 < 20 < 30 < 48 < 35 < 38 05/01/19 - 05/09/19 < 38 < 39 < 16 < 39 < 18 < 39 < 40 < 41 05/09/19 - 05/15/19 < 36 < 37 < 35 < 15 < 25 < 37 < 28 < 31 05/15/19 - 05/21/19 < 54 < 54 < 22 < 54 < 28 < 55 < 32 < 32 05/21/19 - 05/29/19 < 23 < 23 < 19 < 33 < 16 < 24 < 37 < 41 05/29/19 - 06/05/19 < 53 < 54 < 51 < 22 < 27 < 54 < 31 < 33 06/05/19 - 06/12/19 < 49 < 49 < 47 < 20 < 24 < 49 < 52 < 55 06/12/19 - 06/19/19 < 14 < 14 < 6 < 14 < 59 < 14 < 56 (1) 06/19/19 - 06/25/19 < 54 < 55 < 22 < 54 < 39 < 54 < 37 < 50 06/25/19 - 07/02/19 < 34 < 34 < 18 < 34 < 37 < 35 < 35 < 38 07/02/19 - 07/10/19 < 40 < 40 < 16 < 40 < 29 < 40 < 26 < 27 07/10/19 - 07/16/19 < 64 < 54 < 62 < 64 < 64 < 23 < 62 < 28 07/16/19 - 07/24/19 < 33 < 16 < 32 < 33 < 29 < 34 < 27 < 18 07/24/19 - 07/30/19 < 49 < 49 < 48 < 27 < 57 < 49 < 55 < 60 07/30/19 - 08/07/19 < 45 < 45 < 43 < 45 < 24 < 19 < 26 < 27 08/07/19 - 08/15/19 < 36 < 15 < 35 < 36 < 23 < 36 < 23 < 19 08/15/19 - 08/21/19 < 44 < 44 < 43 < 44 < 36 < 19 < 32 < 35 08/21/19 - 08/27/19 < 49 < 48 < 47 < 49 < 34 < 21 < 34 < 31 08/27/19 - 09/04/19 < 33 < 18 < 32 < 33 < 26 < 33 < 29 < 31 09/04/19 - 09/11/19 < 36 < 36 < 35 < 36 < 32 < 15 < 36 < 38 09/11/19 - 09/18/19 (1) < 38 < 36 < 37 < 17 < 38 < 35 < 31 09/18/19 - 09/24/19 < 30 < 30 < 29 < 30 < 24 < 13 < 27 < 28 09/24/19 - 10/02/19 < 17 < 40 < 38 < 40 < 27 < 40 < 26 < 27 10/02/19 - 10/09/19 < 44 < 44 < 42 < 43 < 27 < 19 < 25 < 26 10/09/19 - 10/17/19 < 25 < 26 < 25 < 22 < 54 < 26 < 52 < 23 10/17/19 - 10/23/19 < 34 < 34 < 32 < 34 < 23 < 14 < 26 < 28 10/23/19 - 10/29/19 < 46 < 46 < 44 < 45 < 27 < 19 < 29 < 30 10/29/19 - 11/05/19 < 17 < 18 < 17 < 17 < 19 < 7 < 19 < 16 11/05/19 - 11/13/19 < 36 < 37 < 35 < 36 < 16 < 15 < 19 < 19 11/13/19 - 11/20/19 < 32 < 32 < 31 < 32 < 31 < 15 < 30 < 25 11/20/19 - 11/26/19 < 34 < 34 < 28 < 34 < 46 < 35 < 43 < 46 11/26/19 - 12/04/19 < 20 < 25 < 24 < 24 < 23 < 25 < 26 < 27 12/04/19 - 12/11/19 < 37 < 37 < 35 < 37 < 44 < 17 < 41 < 25 12/11/19 - 12/18/19 < 35 < 36 < 34 < 35 < 17 < 30 < 35 < 37 12/18/19 - 12/26/19 < 18 < 18 < 17 < 18 < 14 < 7 < 13 < 13 12/26/19 - 01/02/20 (1) (1) (1) (1) (1) (1) (1) (1)

MEAN - - - - - - - -

(1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION C-15 2019 OCGS AREOR

Table C-VIII.1 CONCENTRATIONS OF STRONTIUM AND GAMMA EMITTERS IN VEGETATION SAMPLES COLLECTED IN THE VICINITY OF OYSTER CREEK GENERATING STATION, 2019 RESULTS IN UNITS OF PCI/KG WET +/- 2 SIGMA COLLECTION SITE PERIOD Sr-89 Sr-90 Be-7 K-40 I-131 Cs-134 Cs-137 Ba-140 La-140 115 Cabbage 06/26/19 < 17 < 3.3 < 335 1597 +/- 534 < 43 < 35 < 45 < 151 < 24 Collards 06/26/19 < 18 < 3.4 < 258 743 +/- 336 < 34 < 26 < 34 < 105 < 24 Kale 06/26/19 < 19 4.6 +/- 2.3 < 174 1249 +/- 274 < 30 < 14 29 +/- 13 < 77 < 15 Cabbage 07/31/19 < 24 13.8 +/- 3.6 < 278 1193 +/- 375 < 34 < 29 < 37 < 99 < 41 Collards 07/31/19 < 14 6.3 +/- 2.9 210 +/- 115 2304 +/- 266 < 25 < 14 48 +/- 12 < 69 < 18 Kale 07/31/19 < 21 < 4.2 272 +/- 123 3182 +/- 316 < 32 < 19 68 +/- 17 < 87 < 25 Cabbage 09/25/19 < 21 < 2.5 < 221 1376 +/- 333 < 32 < 24 < 31 < 105 < 35 Collards 09/25/19 < 14 < 2.9 < 402 1239 +/- 470 < 54 < 41 < 39 < 140 < 42 Cabbage 10/24/19 < 15 < 4.6 < 391 1866 +/- 529 < 55 < 39 < 43 < 151 < 47 Collards 10/24/19 < 19 3.5 +/- 1.2 859 +/- 328 2739 +/- 550 < 55 < 34 < 43 < 145 < 40 MEAN +/- 2 STD DEV - 7.1 +/- 9.3 447 +/- 716 1749 +/- 1542 - - 48 +/- 39 - -

35 Cabbage 06/26/19 < 20 < 4.2 < 267 2687 +/- 558 < 45 < 41 < 30 < 116 < 54 Collards 06/26/19 < 21 < 4.2 < 334 3377 +/- 616 < 53 < 40 < 39 < 173 < 44 Kale 06/26/19 < 23 6.2 +/- 2.8 < 284 4926 +/- 813 < 48 < 22 < 37 < 125 < 42 Cabbage 07/31/19 < 19 9.5 +/- 3.1 < 224 1866 +/- 462 < 37 < 18 < 31 < 68 < 21 Collards 07/31/19 < 18 < 4.7 195 +/- 106 2351 +/- 258 < 29 < 15 < 15 < 73 < 19 C-16 Kale 07/31/19 < 19 < 4.7 < 119 3146 +/- 222 < 23 < 13 < 14 < 61 < 15 Cabbage 09/25/19 < 23 < 3.6 < 211 979 +/- 359 < 36 < 28 < 27 < 107 < 36 Collards 09/25/19 < 19 4.5 +/- 2.2 594 +/- 298 1825 +/- 524 < 54 < 32 < 40 < 152 < 47 Kale 09/25/19 < 22 < 4.3 387 +/- 129 2627 +/- 281 < 22 < 17 < 17 < 68 < 20 Cabbage 10/24/19 < 21 2.7 +/- 1.0 < 276 1869 +/- 430 < 42 < 35 < 29 < 114 < 30 Kale 10/24/19 < 20 < 1.9 < 196 3102 +/- 393 < 26 < 25 < 23 < 86 < 26 MEAN +/- 2 STD DEV - 5.7 +/- 5.8 392 +/- 399 2614 +/- 2091 - - - - -

36 (Control)

Cabbage 06/26/19 < 24 3.1 +/- 1.8 < 117 1425 +/- 293 < 21 < 17 < 15 < 64 < 15 Collards 06/26/19 < 19 6.1 +/- 2.5 < 161 3911 +/- 436 < 21 < 14 < 15 < 61 < 19 Kale 06/26/19 < 19 < 4.2 < 234 4237 +/- 469 < 34 < 21 < 22 < 92 < 30 Cabbage 07/31/19 < 16 9.6 +/- 3.1 < 280 2640 +/- 546 < 44 < 29 < 26 < 129 < 24 Collards 07/31/19 < 17 < 4.7 < 306 5237 +/- 594 < 46 < 37 < 29 < 143 < 30 Kale 07/31/19 < 21 < 4.6 < 283 5240 +/- 749 < 45 < 28 < 33 < 147 < 29 Cabbage 09/25/19 < 25 11.9 +/- 2.9 < 227 3462 +/- 436 < 32 < 19 < 21 < 86 < 31 Collards 09/25/19 < 24 11.1 +/- 2.9 < 174 4716 +/- 528 < 27 < 16 < 15 < 90 < 23 Kale 09/25/19 < 25 12.8 +/- 2.6 < 256 4695 +/- 702 < 25 < 32 < 19 < 113 < 40 Cabbage 10/24/19 < 21 5.6 +/- 1.9 < 150 2416 +/- 436 < 29 < 18 < 22 < 78 < 31 Collards 10/24/19 < 23 < 4.5 < 288 3090 +/- 528 < 37 < 27 < 26 < 113 < 40 Kale 10/24/19 < 21 13.7 +/- 3.6 < 230 2742 +/- 502 < 25 < 20 < 23 < 84 < 25 2019 OCGS AREOR MEAN +/- 2 STD DEV - 9.2 +/- 7.7 - 3651 +/- 2439 - - - - -

THE MEAN AND TWO STANDARD DEVIATION ARE CALCULATED USING THE POSITIVE VALUES

Table C-IX.1 QUARTERLY OSLD RESULTS FOR OYSTER CREEK GENERATING STATION, 2019(1)

RESULTS IN UNITS OF MILLIREM/STD. QUARTER +/- 2 STANDARD DEVIATION STATION MEAN CODE +/- 2 S.D. JAN - MAR APR - JUN JUL - SEP OCT - DEC 1 27.2 +/- 12.1 21.9 35.6 27.7 23.7 3 19.8 +/- 4.4 17.0 19.0 21.8 21.3 4 26.9 +/- 13.7 20.8 36.4 27.2 23.4 5 24.8 +/- 4.4 24.4 27.2 (1) 22.8 6 21.1 +/- 5.4 18.1 (1) 23.1 22.3 8 25.5 +/- 13.3 19.4 34.9 25.1 22.8 9 26.2 +/- 17.7 18.5 38.7 25.6 21.9 C 21.8 +/- 3.6 19.4 21.8 23.6 22.6 11 25.9 +/- 11.6 19.7 33.7 25.9 24.3 14 23.5 +/- 4.8 20.8 22.1 ` 25.9 25.1 22 28.4 +/- 12.2 22.7 36.2 30.4 24.5 46 24.7 +/- 14.7 17.7 34.8 24.9 21.4 47 21.2 +/- 4.5 18.5 20.3 23.2 22.9 48 26.3 +/- 13.2 19.7 35.3 26.3 23.9 51 27.9 +/- 11.0 22.1 34.8 29.5 25.3 52 29.2 +/- 10.9 23.2 35.8 31.1 27.0 53 28.6 +/- 14.7 21.4 38.6 29.0 25.4 54 26.5 +/- 16.6 18.6 38.0 26.0 23.4 55 32.8 +/- 15.1 26.3 42.7 34.8 27.6 56 30.7 +/- 13.8 24.9 39.8 32.4 25.8 57 25.8 +/- 13.8 19.7 35.5 25.9 22.3 58 25.0 +/- 14.6 18.0 35.3 24.2 22.8 59 28.6 +/- 14.0 20.2 37.2 27.4 29.6 61 20.6 +/- 5.0 18.4 18.8 23.7 21.7 62 21.8 +/- 6.2 18.1 20.7 25.2 23.4 63 21.3 +/- 5.8 17.9 20.2 24.6 22.5 64 20.9 +/- 4.3 18.3 20.2 22.4 22.9 65 21.0 +/- 5.9 17.5 20.4 24.6 21.5 66 20.6 +/- 4.2 19.6 18.3 22.9 21.7 68 24.9 +/- 14.0 18.1 34.5 25.3 22.0 71 26.2 +/- 13.3 20.3 35.7 25.8 23.2 72 21.0 +/- 5.0 18.0 20.0 23.1 23.0 73 25.4 +/- 11.2 19.2 32.7 25.9 23.9 74 21.1 +/- 5.0 18.5 19.4 23.5 23.0 75 22.1 +/- 5.0 19.3 21.3 25.3 22.5 78 21.4 +/- 4.6 19.0 20.5 24.5 21.6 79 27.5 +/- 13.3 21.6 36.6 28.2 23.8 81 26.8 +/- 12.7 20.7 35.4 27.5 23.9 82 21.3 +/- 5.2 18.5 19.9 24.1 22.8 84 27.1 +/- 13.1 20.1 35.5 28.5 24.4 85 26.0 +/- 14.9 19.2 36.6 25.0 23.4 86 26.2 +/- 11.1 20.3 32.8 28.6 23.3 88 24.2 +/- 11.0 18.4 31.5 24.5 22.5 89 19.3 +/- 4.3 17.0 18.2 21.6 20.7 90 19.9 +/- 4.6 17.3 18.6 22.0 21.6 92 21.4 +/- 4.1 19.3 20.3 23.9 22.3 98 25.7 +/- 10.9 19.6 32.6 26.7 23.8 99 24.5 +/- 9.9 19.6 31.4 23.9 23.3 T1 27.1 +/- 12.5 20.4 35.1 28.4 24.4 100 23.6 +/- 0.0 23.6 23.6 23.6 23.6 101 20.9 +/- 5.2 18.2 19.2 23.5 22.7 102 21.9 +/- 4.4 18.9 21.9 23.9 23.1 103 20.7 +/- 4.3 18.1 19.9 22.8 22.2 104 28.1 +/- 19.0 19.1 41.5 27.3 24.7 105 24.6 +/- 13.6 18.3 34.2 24.1 21.9 106 24.2 +/- 0.4 24.1 24.1 24.5 24.1 107 25.2 +/- 12.1 19.1 33.5 25.1 23.3 109 26.6 +/- 10.7 21.2 33.4 27.9 23.7 110 26.6 +/- 13.2 19.9 35.3 27.6 23.8 112 28.3 +/- 14.0 21.6 38.1 27.8 25.7 113 20.7 +/- 4.5 18.1 19.7 22.7 22.6 (1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION (1)

Note: There are two (2) OSLD's posted at each indicator station for redunancy and data revcovery. In reporting results, the average of the gross mean for the two readings is reported. There are four (4) single OSLD's posted at Control Station C and the the average of the gross mean for the four readings is reported.

C-17 2019 OCGS AREOR

TABLE C-IX.2 MEAN QUARTERLY OSLD RESULTS FOR THE SITE BOUNDARY, INTERMEDIATE, SPECIAL INTEREST, AND CONTROL LOCATIONS FOR OYSTER CREEK GENERATING STATION, 2019(1)

RESULTS IN UNITS OF MILLIREM PER STANDARD QUARTER +/- 2 STANDARD DEVIATION STANDARD DEVIATIONS OF THE STATION DATA COLLECTION SITE BOUNDARY INTERMEDIATE SPECIAL INTEREST CONTROL PERIOD +/- 2 S.D. +/- 2 S.D. +/- 2 S.D. +/- 2 S.D.

JAN-MAR 20.3 +/- 5.0 19.8 +/- 3.6 18.6 +/- 2.9 20.1 +/- 2.0 APR-JUN 30.8 +/- 17.7 30.1 +/- 14.1 25.8 +/- 15.9 22.0 +/- 0.4 JUL-SEP 26.8 +/- 6.9 25.5 +/- 3.9 24.0 +/- 4.2 24.7 +/- 3.2 OCT-DEC 24.2 +/- 4.5 23.1 +/- 1.7 22.5 +/- 2.4 23.9 +/- 3.5 TABLE C-IX.3

SUMMARY

OF THE AMBIENT DOSIMETRY PROGRAM FOR OYSTER CREEK GENERATING STATION, 2019 RESULTS IN UNITS OF MILLIREM/STD. QUARTER SAMPLES PERIOD PERIOD PERIOD MEAN LOCATION ANALYZED MINIMUM MAXIMUM +/- 2 S.D.

C-18 SITE BOUNDARY 160 17.5 42.7 25.5 +/- 12.5 INTERMEDIATE 260 17.7 41.5 24.6 +/- 10.6 SPECIAL INTEREST 72 17.0 35.7 22.7 +/- 9.7 CONTROL 24 18.8 25.1 22.6 +/- 4.3 SITE BOUNDARY STATIONS - 1, 51, 52, 53, 54, 55, 56, 57, 58, 59, 61, 62, 63, 64, 65, 66, 112, 113, T1 INTERMEDIATE STATIONS - 4, 5, 6, 8, 9, 22, 46, 47, 48, 68, 73, 74, 75, 78, 79, 82, 84, 85, 86, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 109, 110 SPECIAL INTEREST STATIONS - 3, 11, 71, 72, 81, 88, 89, 90, 92 CONTROL STATIONS - 14, C (1)

Note: There are two (2) OSLD's posted at each indicator station for redunancy and data revcovery. In reporting results, the average of the gross mean for the two readings is reported. There are four (4) single OSLD's posted at Control Station C and the average of the gross mean for the four readings 2019 OCGS AREOR is reported.

FIGURE C-1 MEAN COBALT-60 CONCENTRATION IN CLAMS OYSTER CREEK GENERATING STATION, 1983 - 2019 20 INDICATOR STATION BACKGROUND STATION 15 C-19 10 picoCuries per kilogram (wet) 5 0

2019 OCGS AREOR 1983 1988 1993 1998 2004 2009 2014 2019 YEAR

• The year designations on the x-axis reflect multiple sampling periods in a given year, as well as historical changes in the number of sampling periods per year.

FIGURE C-2 MEAN COBALT-60 CONCENTRATION IN AQUATIC SEDIMENT OYSTER CREEK GENERATING STATION, 1984 - 2019 300 INDICATOR STATION MEAN 250 BACKGROUND STATION MEAN 200 C-20 150 100 picoCuries per kilogram (dry) 50 0

1984 1985 1987 1989 1992 1998 2008 2019 2019 OCGS AREOR YEAR

• The year designations on the x-axis reflect multiple sampling periods in a given year, as well as historical changes in the number of sampling periods per year.

FIGURE C-3 MEAN CESIUM-137 CONCENTRATION IN AQUATIC SEDIMENT OYSTER CREEK GENERATING STATION, 1984 - 2019 600 INDICATOR BACKGROUND 400 C-21 200 picoCuries per kilogram (dry) 0 2019 OCGS AREOR 1984 1985 1987 1989 1992 1998 2008 2019 YEAR

• The year designations on the x-axis reflect multiple sampling periods in a given year, as well as historical changes in the number of sampling periods per year.

FIGURE C-4 MEAN WEEKLY GROSS BETA CONCENTRATIONS IN AIR PARTICULATES OYSTER CREEK GENERATING STATION, 2008 - 2019 0.05 Indicator Background 0.04 0.03 C-22 0.02 picoCuries per cubic meter 0.01 0

2019 OCGS AREOR Date

FIGURE C-5 MEAN MONTHLY GROSS BETA CONCENTRATIONS IN AIR PARTICULATES OYSTER CREEK GENERATING STATION, 1984 - 2019 0.18 CHERNOBYL ACCIDENT Indicator Stations Background Station*

0.16 0.14 0.12 C-23 0.1 0.08 0.06 picoCuries per cubic meter 0.04 0.02 0

2019 OCGS AREOR YEAR

• Data from Cookstown station ONLY after December 1996

FIGURE C-6 MEAN QUARTERLY OSLD GAMMA DOSE OYSTER CREEK GENERATING STATION, 2019 35.0 30.0 25.0 20.0 C-24 15.0 10.0 millirem per Standard Quarter 5.0 0.0 0 TO 2 MILES 2 TO 5 MILES OVER 5 MILES DISTANCE RING FROM PLANT 1Q19 2Q19 3Q19 4Q19 2019 OCGS AREOR Oyster Creek's dosimetry changed from TLD to OSLD in 2012.

APPENDIX D DATA TABLES QC COMPARISON SAMPLES 2019 OCGS AREOR

The following section presents the results of data analysis performed by the QC laboratory, Environmental Inc. Duplicate samples were obtained from several locations and media and were split with the primary laboratory, Teledyne Brown Engineering (TBE) and the QC Laboratory.

Comparison of the results for all media were within expected ranges.

2019 OCGS AREOR

Table D-I.1 CONCENTRATIONS OF TRITIUM IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF OYSTER CREEK GENERATING STATION, 2019 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION PERIOD 24 (TBE) QCA (TBE) QC-24 (EIML) 06/26/19 < 191 < 190 (1) 09/30/19 < 180 < 181 < 147 (1) No sample collected or analyzed D-1 2019 OCGS AREOR

Table D-I.2 CONCENTRATIONS OF GAMMA EMITTERS IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF OYSTER CREEK GENERATING STATION, 2019 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE PERIOD Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140 La-140 24 06/26/19 < 6 < 7 < 11 < 5 < 19 < 7 < 12 < 8 < 8 < 35 < 10 (TBE) 09/30/19 < 6 < 6 < 14 < 7 < 10 < 5 < 7 < 5 < 4 < 24 < 8 QCA 06/03/19 < 6 < 7 < 10 < 7 < 15 < 5 < 9 < 8 < 6 < 31 < 13 (TBE) 09/30/19 < 5 < 5 < 14 < 7 < 13 < 6 < 8 < 7 < 5 < 27 < 7 D-2 QC-24 06/26/19 (1)

(EIML) 09/30/19 < 2 < 2 < 4 < 3 < 7 < 3 < 5 < 3 < 2 < 16 < 3 2019 OCGS AREOR (1) No sample collected or analyzed

Table D-II.1 CONCENTRATIONS OF TRITIUM IN DRINKING WATER SAMPLES COLLECTED IN THE VICINITY OF OYSTER CREEK GENERATING STATION, 2019 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION PERIOD 1N (TBE) QC1N (EIML) 09/04/19 - 09/26/19 < 195 < 148 10/02/19 - 10/30/19 < 191 < 154 11/05/19 - 11/29/19 < 188 < 150 TABLE D-II.2 CONCENTRATIONS OF I-131 IN DRINKING WATER SAMPLES COLLECTED IN THE VICINITY OF OYSTER CREEK GENERATING STATION, 2019 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION PERIOD 1N (TBE) QC1N (EIML) 09/04/19 - 09/26/19 < 1.0 < 0.4 10/02/19 - 10/30/19 < 0.9 < 0.3 11/05/19 - 11/29/19 < 0.9 < 0.4 D-3 2019 OCGS AREOR

Table D-II.3 CONCENTRATIONS OF GAMMA EMITTERS IN DRINKING WATER SAMPLES COLLECTED IN THE VICINITY OF OYSTER CREEK GENERATING STATION, 2019 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA SITE COLLECTION PERIOD Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140 La-140 1N 09/04/19 - 09/26/19 < 5 < 4 < 13 < 5 < 11 < 5 < 10 < 5 < 6 < 27 < 10 (TBE) 10/03/19 - 10/30/19 < 3 < 4 < 9 < 4 < 7 < 4 < 6 < 4 < 4 < 27 < 10 11/06/19 - 11/27/19 < 6 < 6 < 11 < 6 < 13 < 6 < 9 < 7 < 5 < 34 < 9 QC1N 09/04/19 - 09/26/19 < 3 < 2 < 7 < 2 < 5 < 3 < 7 < 3 < 4 < 27 < 6 (EIML) 10/03/19 - 10/30/19 < 2 < 2 < 5 < 1 < 4 < 4 < 5 < 2 < 2 < 11 < 4 11/06/19 - 11/27/19 < 2 < 2 < 4 < 3 < 6 < 4 < 5 < 3 < 3 < 17 < 5 D-4 2019 OCGS AREOR

Table D-III.1 CONCENTRATIONS OF TRITIUM IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF OYSTER CREEK GENERATING STATION, 2019 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION PERIOD W-3C QC-W-3C (EIML) 10/09/19 - 10/09/19 < 182 < 151 D-5 2019 OCGS AREOR

Table D-III.2 CONCENTRATIONS OF GAMMA EMITTERS IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF OYSTER CREEK GENERATING STATION, 2019 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE PERIOD Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 I-131 Cs-134 Cs-137 Ba-140 La-140 W-3C 10/09/19 - 10/09/19 < 5 < 8 < 9 < 4 < 17 < 8 < 15 < 11 < 9 < 6 < 29 < 14 (TBE)

QC -W-3C 10/31/18 - 10/31/18 < 4 < 4 < 6 < 5 < 7 < 3 < 6 < 7 < 3 < 4 < 23 < 3 (EIML)

D-6 2019 OCGS AREOR

Table D-IV.1 CONCENTRATIONS OF GAMMA EMITTERS IN CLAM SAMPLES COLLECTED IN THE VICINITY OF OYSTER CREEK GENERATING STATION, 2019 RESULTS IN UNITS OF PCI/KG WET +/- 2 SIGMA COLLECTION SITE PERIOD K-40 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Cs-134 Cs-137 24 06/03/19 1475 +/- 929 < 62 < 51 < 110 < 70 < 87 < 31 < 57 (TBE)

QCA 06/03/19 1124 +/- 597 < 57 < 35 < 61 < 30 < 120 < 52 < 56 (TBE)

QC-24 (1) 06/03/19 (EIML)

D-7 2019 OCGS AREOR (1) No sample collected or analyzed

Table D-V.1 CONCENTRATIONS OF GAMMA EMITTERS IN SEDIMENT SAMPLES COLLECTED IN THE VICINITY OF OYSTER CREEK GENERATING STATION, 2019 RESULTS IN UNITS OF PCI/KG DRY +/- 2 SIGMA COLLECTION SITE PERIOD Be-7 K-40 Mn-54 Co-58 Co-60 Cs-134 Cs-137 Ra-226 Th-228 24 06/03/19 < 695 18160 +/- 1586 < 83 < 64 < 83 < 88 < 79 < 1931 866 +/- 144 (TBE) 09/30/19 < 677 16160 +/- 2025 < 96 < 69 < 92 < 103 < 74 < 1455 745 +/- 179 QCA 06/03/19 < 611 11300 +/- 1468 < 54 < 62 < 68 < 65 < 62 2767 +/- 1548 542 +/- 182 (TBE) 09/30/19 < 650 17330 +/- 2093 < 104 < 92 < 73 < 113 < 87 < 1880 721 +/- 155 QC-24 06/03/19 (1)

(EIML) 09/30/19 < 295 13165 +/- 639 < 20 < 25 < 18 < 13 < 18 1523 +/- 639 < 1661 D-8 2019 OCGS AREOR (1) No sample collected or analyzed

TABLE D-VI.1 CONCENTRATIONS OF STRONTIUM AND GAMMA EMITTERS IN VEGETATION SAMPLES COLLECTED IN THE VICINITY OF OYSTER CREEK GENERATING STATION, 2019 RESULTS IN UNITS OF PCI/KG WET +/- 2 SIGMA COLLECTION SITE PERIOD Sr-89 Sr-90 Be-7 K-40 I-131 Cs-134 Cs-137 Ba-140 La-140 36 (TBE)

Cabbage 09/25/19 < 25 12 +/- 2.9 < 227 3462 +/- 436 < 32 < 19 < 21 < 86 < 31 Collard Greens 09/25/19 < 24 11.1 +/- 2.9 < 174 4716 +/- 528 < 27 < 16 < 15 < 90 < 23 Kale 09/25/19 < 25 13 +/- 2.6 < 256 4695 +/- 702 < 25 < 32 < 19 < 113 < 40 QC-36 (EIML)

Cabbage 09/25/19 < 5 < 3 395 +/- 204 2822 +/- 327 < 29 < 12 < 10 < 54 < 16 Collard Greens 09/25/19 < 5 < 3 41 +/- 45 3945 +/- 295 < 21 < 10 < 8 < 57 < 14 Rape 09/25/19 < 4 < 2 225 +/- 124 4600 +/- 386 < 18 < 13 < 13 < 46 < 14 D-9 2019 OCGS AREOR

Intentionally left blank 2019 OCGS AREOR

APPENDIX E INTER-LABORATORY COMPARISON PROGRAM 2019 OCGS AREOR

Intentionally left blank 2019 OCGS AREOR

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

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

A = Acceptable - reported result falls within ratio limits of 0.80-1.20 W = Acceptable with warning - reported result falls within 0.70-0.80 or 1.20-1.30 N = Not Acceptable - reported result falls outside the ratio limits of < 0.70 and > 1.30 (Page 1 of 2)

E-1 2019 OCGS AREOR

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

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

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

A = Acceptable - reported result falls within ratio limits of 0.80-1.20 W = Acceptable with warning - reported result falls within 0.70-0.80 or 1.20-1.30 N = Not Acceptable - reported result falls outside the ratio limits of < 0.70 and > 1.30 (1) See NCR 19-27 (Page 2 of 2)

E-2 2019 OCGS AREOR

DOE's Mixed Analyte Performance Evaluation Program (MAPEP)

Table E.2 Teledyne Brown Engineering Environmental Services TBE Identification Known Acceptance Month/Year Matrix Nuclide Units Reported Evaluation (b)

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

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

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

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

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

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

(7) See NCR 19-26 E-3 2019 OCGS AREOR

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

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

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

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

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

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

(b) ERA evaluation:

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

E-4 2019 OCGS AREOR

TABLE E.4 Interlaboratory Comparison Crosscheck Program, New York Department of Health (ELAP)a Environmental, Inc., Midwest Laboratory (Relevant Nuclides Only)

Laboratory Known Acceptance Lab Code Date Analysis Acceptance Result Activity Limits NYW-3472 09/17/19 H-3 5,250 +/- 229 4,991 4,280 - 5,490 Pass NYW-3472 09/17/19 I-131 18.7 +/- 1.8 15.6 12.8 - 19.3 Pass NYW-3472 09/17/19 Co-60 63.9 +/- 4.0 63.0 56.7 - 71.8 Pass NYW-3472 09/17/19 Zn-65 108 +/- 9.0 113 97.2 - 129 Pass NYW-3472 09/17/19 Cs-134 47.2 +/- 3.4 55.8 45.1 - 61.4 Pass NYW-3472 09/17/19 Cs-137 52.0 +/- 4.6 53.8 48.4 - 62.0 Pass a

Results obtained by Environmental, Inc., Midwest Laboratory as a participant in the crosscheck program for proficiency testing in drinking water conducted by the New York Department of Health Laboratory Approval Program (NY ELAP)

E-5 2019 OCGS AREOR

TABLE E.5 DOE's Mixed Analyte Performance Evaluation Program (MAPEP)

Environmental, Inc., Midwest Laboratory (Relevant Nuclides Only)

Concentration a Reference Laboratory Known Lab Code b Analysis Control Limits c Acceptance Date Result Activity MASO-605 02/01/19 Cs-134 0.45 +/- 2.52 0 NA c Pass MASO-605 02/01/19 Cs-137 1273.1 +/- 13.0 1,164 815 - 1,513 Pass MASO-605 02/01/19 Co-60 857.96 +/- 8.52 855 599 - 1,112 Pass MASO-605 02/01/19 Mn-54 1138 +/- 13.5 1027 719 - 1,335 Pass MASO-605 02/01/19 K-40 676 +/- 47 585 410 - 761 Pass MAW-613 02/01/19 Cs-134 5.49 +/- 0.18 5.99 4.19 - 7.79 Pass MAW-613 02/01/19 Cs-137 0.089 +/- 0.080 0 NA c Pass MAW-613 02/01/19 Co-60 6.78 +/- 0.19 6.7 4.7 - 8.7 Pass MAW-613 02/01/19 Mn-54 8.98 +/- 0.17 8.4 5.9 - 10.9 Pass MAW-613 02/01/19 Zn-65 0.096 +/- 0.141 0 NA c Pass MAVE-607 02/01/19 Cs-134 2.33 +/- 0.10 2.44 1.71 - 3.17 Pass MAVE-607 02/01/19 Cs-137 2.62 +/- 0.13 2.30 1.61 - 2.99 Pass MAVE-607 02/01/19 Sr-90 0.013 +/- 0.022 0 NA c Pass MASO-3297 08/01/19 Cs-134 881.98 +/- 903 1,020 714 - 1,326 Pass MASO-3297 08/01/19 Cs-137 871.50 +/- 10.83 789 552 - 1,026 Pass MASO-3297 08/01/19 Co-60 783.69 +/- 8.21 760 532 - 988 Pass MASO-3297 08/01/19 Mn-54 834.48 +/- 11.29 745 522 - 969 Pass MASO-3297 08/01/19 K-40 662.91 +/- 42.65 555 389 - 722 Pass MAW-3240 08/01/19 Cs-134 -0.08 +/- 0.06 0 NA c Pass MAW-3240 08/01/19 Cs-137 18.48 +/- 0.90 18.4 12.9 - 23.9 Pass MAW-3240 08/01/19 Co-60 8.67 +/- 0.39 8.8 6.2 - 11.4 Pass MAW-3240 08/01/19 Mn-54 20.72 +/- 0.93 20.6 14.4 - 26.8 Pass MAW-3240 08/01/19 Zn-65 20.52 +/- 1.05 20.3 14.2 - 26.4 Pass MAW-3240 08/01/19 H-3 179.52 +/- 3.32 175 123 - 228 Pass MAVE-3295 08/01/19 Cs-134 0.02 +/- 0.02 0 NA c Pass MAVE-3295 08/01/19 Cs-137 3.38+/- 0.32 3.28 2.30 - 4.26 Pass a

Results are reported in units of Bq/kg (soil), Bq/L (water) or Bq/total sample (vegetation) b Laboratory codes as follows: MAW (water), MASO (soil), MAVE (vegetation) c MAPEP results are presented as the known values and expected laboratory precision (1 sigma, 1 determination) and control limits as defined by the MAPEP. A known value of "zero" indicates an analysis was included in the testing series.

as a "false positive". MAPEP does not provide control limits.

d Provided in the series for "sensitivity evaluation". MAPEP does not provde control limits.

E-6 2019 OCGS AREOR

TABLE E.6 Interlaboratory Comparison Crosscheck Program, Environmental Resource Associates (ERA)a RAD Study Environmental, Inc., Midwest Laboratory (Relevant Nuclides Only)

Laboratory Lab Code Date Analysis ERA Result Control Limits Acceptance Result ERW-71 01/07/19 Cs-134 45.4 +/- 3.1 49.1 39.5 - 54.0 Pass ERW-71 01/07/19 Cs-137 129 +/- 6.0 125 112 - 140 Pass ERW-71 01/07/19 Co-60 98.1 +/- 4.1 96 86.8 - 108 Pass ERW-71 01/07/19 Zn-65 80.4 +/- 7.8 77.4 69.5 - 93.2 Pass ERW-71 01/07/19 H-3 2,129 +/- 158 2,110 1,740 - 2,340 Pass ERW-397 02/11/19 I-131 27.2 +/- 1.0 25.9 25.1 - 30.6 Pass ERW-2471 07/08/19 Cs-134 29.6 +/- 2.6 32.0 25.1 - 35.2 Pass ERW-2471 07/08/19 Cs-137 21.3 +/- 3.6 21.4 17.6 - 26.7 Pass ERW-2471 07/08/19 Co-60 99.9 +/- 4.4 95.1 85.6 - 107 Pass ERW-2471 07/08/19 Zn-65 43.7 +/- 6.2 41.2 35.3 - 51.4 Pass ERW-2471 07/08/19 H-3 8,630 +/- 200 16,700 14,600 - 18,400 Failb ERW-2471 07/08/19 I-131 33.6 +/- 1.3 29.6 24.6 - 34.6 Pass a

Results obtained by Environmental, Inc., Midwest Laboratory as a participant in the crosscheck program for proficiency testing in drinking water conducted by Environmental Resources Associates (ERA).

b EIML's routine analysis does include a blank sample. The ERA-provided blank was paired with a H-3 standard vial and EIML's blank was also paired with a standard vial. Inadvertently, the efficiency was overestimated by a factor of 2, which caused the calculated result to be half of the actual value. The result of reanalysis (17,400 pCi/L) is within the control limits for the study.

E-7 2019 OCGS AREOR

Intentionally left blank 2019 OCGS AREOR

APPENDIX F ERRATA DATA 2019 OCGS AREOR

Intentionally left blank 2019 OCGS AREOR

There is no errata data for 2019.

2019 OCGS AREOR

Intentionally left blank 2019 OCGS AREOR

APPENDIX G ANNUAL RADIOLOGICAL GROUNDWATER PROTECTION PROGRAM REPORT (ARGPPR) 2019 OCGS AREOR

Intentionally left blank 2019 OCGS GWPPR

Docket No: 50-219 OYSTER CREEK GENERATING STATION UNIT 1 Annual Radiological Groundwater Protection Program Report 1 January through 31 December 2019 Prepared By Teledyne Brown Engineering Environmental Services Oyster Creek Generating Station Forked River, NJ 08731 April 26, 2020 2019 OCGS GWPPR

Intentionally left blank 2019 OCGS GWPPR

Table of Contents I. Summary and Conclusions .............................................................................................. 1 II. Introduction ..................................................................................................................... 2 A. Objectives of the RGPP ...................................................................................... 4 B. Implementation of the Objectives ........................................................................ 5 C. Program Description ........................................................................................... 5 D. Characteristics of Tritium (H-3) ........................................................................... 6 III. Program Description ...................................................................................................... 7 A. Sample Analysis .................................................................................................. 7 B. Data Interpretation............................................................................................... 7 C. Background Analysis........................................................................................... 8 IV. Results and Discussion ............................................................................................... 10 A. Program Exceptions .......................................................................................... 10 B. Groundwater Results......................................................................................... 10 C. Surface Water Results ...................................................................................... 11 D. Precipitation Water Results............................................................................... 11 E. Summary of Results - Inter-laboratory Comparison Program .......................... 11 F. Leaks, Spills, and Releases .............................................................................. 11 G. Trends ............................................................................................................... 12 H. Investigations .................................................................................................... 12 I. Actions Taken ..................................................................................................... 12 V. References ................................................................................................................... 13 i

2019 OCGS GWPPR

Appendices Appendix A Location Designation Tables Table A-1 Radiological Groundwater Protection Program - Sampling Locations, Oyster Creek Generating Station, 2019 Figures Figure A-1 Sampling locations - Selected Cohansey and Cape May Formation Wells, Oyster Creek Generating Station, 2019 Security-Related Information: Detailed maps of the Oyster Creek Generating Station have been withheld from public disclosure under 10 CFR 2.390 and N.J.S.A. 47:1A-1.1 Appendix B Data Tables Tables Table B-I.1 Concentrations of Tritium, Strontium, Gross Alpha and Gross Beta in Groundwater Samples Collected as Part of the Radiological Groundwater Protection Program, Oyster Creek Generating Station, 2019 Table B-I.2 Concentrations of Gamma Emitters in Groundwater Samples Collected as Part of the Radiological Groundwater Protection Program, Oyster Creek Generating Station, 2019 Table B-I.3 Concentrations of Hard-To-Detects in Groundwater Samples Collected as Part of the Radiological Groundwater Protection Program, Oyster Creek Generating Station, 2019 Table B-II.1 Concentrations of Tritium in Surface Water Samples Collected as Part of the Radiological Groundwater Protection Program, Oyster Creek Generating Station, 2019 Table B-II.2 Concentrations of Gamma Emitters in Surface Water Samples Collected as Part of the Radiological Groundwater Protection Program, Oyster Creek Generating Station, 2019 Table B-II.3 Concentrations of Hard-To-Detects in Surface Water Samples Collected as Part of the Radiological Groundwater Protection Program, Oyster Creek Generating Station, 2019 Table B-III.1 Concentrations of Tritium in Precipitation Water Samples Collected as Part of the Radiological Groundwater Protection Program, Oyster Creek Generating Station, 2019 ii 2019 OCGS GWPPR

I. Summary and Conclusions This report on the Radiological Groundwater Protection Program (RGPP) conducted for the Oyster Creek Generating Station (OCGS) by Holtec Decommissioning International (HDI) covers the period 01 January 2019 through 31 December 2019.

This report covers groundwater and surface water samples collected from the environment, both on and off station property in 2019. In 2019, 393 analyses were performed on 155 samples from 46 locations.

There were three inadvertent releases of contaminated water into the groundwater during 2009 resulting in a plume located west of the turbine building, which is monitored via a series of monitoring wells.

Gamma-emitting radionuclide Potassium-40 (K-40) was detected in 2 of the 55 groundwater well samples. The concentrations ranged from 90 to 100 pCi/L.

K-40 was not detected in any surface water sample.

In the case of tritium, HDI specified that its laboratories achieve a lower limit of detection 100 times lower than the drinking water limit specified by the United States Environmental Protection Agency (USEPA) (200 pCi/l versus 20,000 pCi/l). As expected, tritium was detected in groundwater samples, although tritium concentrations have decreased substantially since 2009. The 2019 tritium concentrations varied from <172 to 1,590 pCi/l. The well with the highest concentration was MW-56I.

Surface water samples were collected from onsite and offsite monitoring locations during 2019. Tritium was detected in 1 of 23 samples at a concentration of 211 pCi/L. No detectable tritium (greater than the MDC) was found in precipitation water samples.

Strontium-89 (Sr-89) and Strontium-90 (Sr-90) were not detected in any groundwater samples during 2019.

Gross Alpha and Gross Beta analyses in the dissolved and suspended fractions were performed on groundwater samples during the second and third quarters in 2019. There were 30 samples taken from 20 groundwater well locations. Gross Alpha (dissolved) was detected in 3 samples. The concentrations ranged from 1.2 to 2.2 pCi/L. Gross Alpha (suspended) was detected in 14 samples and ranged from 1.7 to 35.4 pCi/L. Gross Beta (dissolved) was detected in 24 samples and ranged from 1.1 to 22.1 pCi/L. Gross Beta (suspended) was detected in 16 samples and ranged from 2.5 to 52.1 pCi/L.

Hard-To-Detect analyses were not performed on any surface or groundwater samples in 2019.

2019 OCGS GWPPR

II. Introduction On July 1st 2019, ownership of the Oyster Creek Nuclear Power Station and transfer of the station and decommissioning license from Exelon Generation Company, LLC to Oyster Creek Environmental Protection, LLC (OCEP) as the licensed owner and Holtec Decommissioning International, LLC (HDI) as the licensed operator, was completed. Exelon had determined that transitioning operational nuclear plants to decommissioning nuclear plants targeted for permanent shutdown was not aligned with its core objectives and actively sought buyers who would assume ownership and complete decommissioning and license termination.

The Oyster Creek Nuclear Generating Station consists of a single boiling water reactor (BWR) and turbine generator was capable of producing 650 megawatts of electricity. The Station operates under Nuclear Regulatory Commission (NRC) renewed facility operating license number DPR-16. Brackish water from Barnegat Bay is supplied to the circulating water system. The circulating water system is designed to supply a continuous flow of water from Barnegat Bay through the plant to remove the waste heat released by the power cycle in the Main Condenser. The circulating water system is comprised of the intake canal from Barnegat Bay to the plant, the Main Condenser Circulating Water System, the dilution plant, and the discharge canal to Barnegat Bay. The dilution plant portion of the system minimizes the adverse effects of hot discharge water on aquatic life in the discharge canal and Barnegat Bay to meet the conditions of the Oyster Creek New Jersey Pollutant Discharge Elimination system (NJPDES)

Permit No. NJ0005550. Approximately 125,000 gallons per minute of water were withdrawn, and reduced to 35,000 gallons per minute by the 2nd quarter of 2019, from the intake canal for dilution and station use and returned to the discharge canal.

The Station is located in the Atlantic Coastal Plain physiographic province.

Topography in the region of the Station is a slightly undulating coastal plain having low relief. The land surface gradually rises from sea level at Barnegat Bay, which is located east of the Station, to approximately 50 feet above mean sea level (AMSL) 2 miles inland. This region of the coastal plain has numerous tidal marshes and is incised by easterly flowing streams and creeks. Elevations at the Station property west of Route 9 range from approximately 0 to 15 feet AMSL immediately adjacent to the intake and discharge canals to slightly more than 30 feet AMSL in the northwest portion of the Station property. The 150-acre developed portion of the Site located within the "horseshoe" formed by the intake and discharge canals west of Route 9 has an approximate average elevation of 20 feet AMSL. In the immediate vicinity of the intake and discharge canals, the Station property slopes steeply down to the canal. The average elevation of the surface water level in the intake and discharge canals is approximately 1-foot AMSL. The ground surface is relatively level except for the steep slopes at areas adjacent to the intake and discharge canals.

2019 OCGS GWPPR

The three shallowest stratigraphic units in the vicinity of the Oyster Creek area in descending order are the Cape May Formation, the Cohansey Formation, and the Kirkwood Formation. Some of the Station structures are constructed to depths of approximately 50 feet below ground surface (bgs). Excavations were completed from grade, through the fill, Cape May Formation, Upper Clay, and into the Cohansey Formation during construction. Consequently, the bottoms of some Station structures are completed within the Cohansey Formation and some structures breach the Upper Clay.

The Cape May Formation regionally has an average thickness of 40 feet and at OCGS, the Cape May is described as a light gray to tan, medium- to fine-grained sand, with trace to some silt and occasional coarse sand. It is generally poorly compacted. The Cape May Formation varies from 0 to 21 feet in thickness based on historical boring logs. The variation principally is due to the varying amount of material excavated and replaced by fill during Station construction.

When present, the thickness of the Cape May generally ranges from 15 to 20 feet thick. The base of the Cape May generally is defined by the presence of a dark clay unit referred to as the Upper Clay unit. The Upper Clay is a stiff to hard, gray, plastic organic clay containing inclusions (also described as lenses or partings) of dense fine sand with trace to some organic silt. The deposits of fine sand within the Upper Clay layer have high relative densities and occur as lenses or inclusions.

The Cohansey Formation is primarily composed of a light-colored, fine- to very coarse-grained quartzose sand with lenses of silt and clay. Although most borings at the Station do not penetrate the entire Cohansey Formation, this formation appears to be approximately 60 to 80 feet thick at OCGS. A clay sequence, referred to at the Station as the "Lower Clay", marks the base of the Cohansey, which generally is present to approximately 90 to 100 feet bgs. The lower clay is a dense gray medium- to fine-grained sand containing trace to some organic silt and layers or inclusions of very stiff to hard gray organic clay.

The thickness of the lower clay is estimated to be approximately 10 to 20 feet in the vicinity of OCGS.

The Cohansey Formation is underlain by the Kirkwood Formation which consists of several stratigraphic units. The Kirkwood Formation is described as a medium- to fine-grained sand with trace silt. The thickness of this formation beneath the Station is unknown. The south domestic supply well terminates in the Kirkwood at a depth of 310 feet bgs. The Kirkwood thickness in Ocean County ranges from approximately 300 to 400 feet.

This report covers those analyses performed by Teledyne Brown Engineering (TBE) and Environmental Inc. (Midwest Labs) on samples collected in 2019.

2019 OCGS GWPPR

A. Objectives of the RGPP The long-term objectives of the RGPP are as follows:

Ensure that the site characterization of geology and hydrology provides an understanding of predominant ground water gradients based upon current site conditions Identify site risk based on plant design and work practices Evaluate all SSCs that contain or could contain licensed material and for which there is a credible mechanism for the licensed material to reach groundwater Evaluate work practices that involve licensed material and for which there is a credible mechanism for the licensed material to reach groundwater Perform on-site monitoring to ensure timely detection of inadvertent radiological releases to ground water Understand background concentrations of radioactive analytes outside of the REMP, as required Evaluate return/re-use of previously discharged radioactive effluents in gaseous or liquid effluents that are returned from the environment to the operating nuclear power facility Ensure controls are established for the selection, installation and retirement of monitoring wells Perform remediation protocols to prevent migration of licensed material off-site and to minimize decommissioning impacts Ensure that records of leaks, spills, remediation efforts are retained and retrievable to meet the requirements of 10 CFR 50.75(g)

Ensure periodic communications are held on the RGPP with the designated State/Local officials Ensure timely verbal and written reporting occurs if there is an inadvertent release of licensed materials to the soil, groundwater or surface water Document and report all applicable RGPP data 2019 OCGS GWPPR

Identify and resolve deficiencies via the Corrective Action Process as delineated in PI- DC-125, Decommissioning Corrective Action Program Perform program oversight to ensure effective implementation of the voluntary RGPP B. Implementation of the Objectives The objectives identified have been implemented at the Oyster Creek Generating Station through compliance with approved procedures EN-AA-408-4000, Radiological Groundwater Protection Program Implementation, and site specific procedure EN-OC-408-4160, RGPP Reference Material, for Oyster Creek Generating Station.

C. Program Description Samples for the OCGS site were collected for HDI by on-site personnel and Normandeau Associates, Inc. This section describes the general collection methods used to obtain environmental samples for the OCGS RGPP in 2019. Sample locations can be found in Table A-1, Appendix A.

1. Sample Collection Samples of water are collected, managed, transported and analyzed in accordance with approved procedures. Both groundwater and surface water are collected. Sample locations, sample collection frequencies and analytical frequencies are controlled in accordance with approved station procedures. Contractor and/or station personnel are trained in the collection, preservation management, and shipment of samples, as well as in documentation of sampling events.

2. Sample Analysis Samples are analyzed in accordance with approved procedures that are based on industry standards.

3. Quality Control Analytical laboratories are subject to internal quality assurance programs, industry cross-check programs, nuclear industry audits, as well as being certified by the State of New Jersey.

4. Data Interpretation Station personnel review and evaluate all analytical data deliverables as data is received. Analytical data results are reviewed by both 2019 OCGS GWPPR

station personnel and independent consultants, including a hydrogeologist, for adverse trends or changes to hydrogeologic conditions.

D. Characteristics of Tritium (H-3)

Tritium (chemical symbol H-3) is a radioactive isotope of hydrogen. The most common form of tritium is tritium oxide, which is also called "tritiated water." The chemical properties of tritium are essentially those of ordinary hydrogen.

Tritiated water behaves the same as ordinary water in both the environment and the body. Tritium can be taken into the body by drinking water, breathing air, eating food, or absorption through the skin. Once tritium enters the body, it disperses quickly and is uniformly distributed throughout the body. Tritium is excreted primarily through urine with a clearance rate characterized by an effective biological half-life of about 10 days.

Tritium is produced naturally in the upper atmosphere when cosmic rays strike air molecules. Tritium is also produced during nuclear weapons explosions, as a by-product in reactors producing electricity, and in special production reactors. Also, tritium was released into the atmosphere from Chernobyl in 1986. Like normal water, tritiated water is colorless and odorless. Tritiated water behaves chemically and physically like non-tritiated water in the subsurface, and therefore tritiated water will travel at the same velocity as the average groundwater velocity.

Tritium has a half-life of approximately 12.3 years. It decays spontaneously to Helium-3 (He-3). This radioactive decay releases a beta particle (18.6 keV low-energy electron). The radioactive decay of tritium is the source of the health risk from exposure to tritium. Tritium is one of the least dangerous radionuclides because it emits very weak radiation and leaves the body relatively quickly. Since tritium is almost always found as water, it goes directly into soft tissues and organs. The associated dose to these tissues is generally uniform and is dependent on the water content of the specific tissue.

2019 OCGS GWPPR

III. Program Description A. Sample Analysis This section describes the general analytical methodologies used by TBE to analyze the environmental samples for radioactivity for the Oyster Creek Generating Station RGPP in 2019. The sampling frequencies are increased if activity is detected.

In order to achieve the stated objectives, the current program includes the following analyses for groundwater, surface water, and precipitation water:

1. Gamma emitters

2. Strontium-89 and Strontium-90

3. Tritium

4. Gross Alpha (Dissolved and Suspended) and Gross Beta (Dissolved and Suspended)

5. Selected transuranics

6. Fe-55

7. Ni-63 B. Data Interpretation The radiological data collected prior to Oyster Creek Generating Station becoming operational, as well as background data from publicly available databases, were used as a baseline with which these operational data were compared. For the purpose of this report, Oyster Creek Generating Station was considered operational at initial criticality. Several factors were important in the interpretation of the data:

1. Lower Limit of Detection and Minimum Detectable Concentration The lower limit of detection (LLD) is defined as the smallest concentration of radioactive material in a sample that would yield a net count (above background) that would be detected with only a 5%

probability of falsely concluding that a blank observation represents a "real" signal. The LLD is intended as a before the fact estimate of a system (including instrumentation, procedure and sample type) and not as an after the fact criterion for the presence of activity. All analyses were designed to achieve the required OCGS detection capabilities for environmental sample analysis.

2019 OCGS GWPPR

The minimum detectable concentration (MDC) is defined as the smallest concentration of radioactive material in a sample that would yield a net count (above background) that would be detected with only a 5% probability of falsely concluding that a blank observation represents a "real" signal as an after the fact estimate of the presence of activity.

2. Laboratory Measurements Uncertainty The estimated uncertainty in measurement of tritium in environmental samples is frequently on the order of 50% of the measurement value.

Statistically, the exact value of a measurement is expressed as a range with a stated level of confidence. The convention is to report results with a 95% level of confidence. The uncertainty comes from calibration standards, sample volume or weight measurements, sampling uncertainty and other factors. Exelon reports the uncertainty of a measurement created by statistical process (counting error) as well as all sources of error (Total Propagated Uncertainty or TPU). Each result has two values calculated. Exelon reports the TPU by following the result with plus or minus (+/-) the estimated sample standard deviation, as TPU, that is obtained by propagating all sources of analytical uncertainty in measurements.

Analytical uncertainties are reported at the 95% confidence level.

C. Background Analysis

1. Background Concentrations of Tritium The purpose of the following discussion is to summarize background measurements of tritium in various media performed by others.

Additional detail may be found by consulting references.

a. Tritium Production Tritium is created in the environment from naturally occurring processes both cosmic and subterranean, as well as from anthropogenic (i.e., man-made) sources. In the upper atmosphere, cosmogenic tritium is produced from the bombardment of stable nuclides and combines with oxygen to form tritiated water, which will then enter the hydrologic cycle.

Below ground, lithogenic tritium is produced by the bombardment of natural lithium present in crystalline rocks by neutrons produced by the radioactive decay of naturally abundant uranium and thorium. Lithogenic production of tritium is usually negligible compared to other sources due to the limited abundance of lithium in rock. The lithogenic tritium is introduced directly to groundwater.

2019 OCGS GWPPR

A major anthropogenic source of tritium and Sr-90 comes from the former atmospheric testing of thermonuclear weapons.

Levels of tritium in precipitation increased significantly during the 1950s and peaked in 1963 with the signing of the limited test ban treaty. The Canadian heavy water nuclear power reactors, other commercial power reactors, nuclear research and weapons production continue to influence tritium concentrations in the environment. Also, tritium was released into the atmosphere from Chernobyl in 1986.

b. Precipitation Data Precipitation samples are routinely collected at stations around the world for the analysis of tritium and other radionuclides. One publicly available database that provides tritium concentrations in precipitation is the USEPAs RadNet database. RadNet provides tritium precipitation concentration data for samples collected at stations throughout the U.S. from 1978 up to and including 1996.

Tritium concentrations in precipitation in New Jersey from 1978 through 1996 have ranged from 600 pCi/L in 1979 to 0 pCi/L in 1996, with an average of 185 pCi/L. Tritium concentrations in wells may still be above the 200 pCi/l detection limit from the external causes described above. Water from previous years and decades is naturally captured in groundwater, so some well water sources today are affected by the surface water from the 1960s that was elevated in tritium.

c. Surface Water Data Tritium concentrations are routinely measured in surface water bodies, including Oyster Creek and the Delaware River. New Jersey surface water data between 1978 and 1998 averaged 185 pCi/L.

The USEPA RadNet surface water data typically has a reported Combined Standard Uncertainty of 2 standard deviations. This corresponds to a +/- 36 to +/-100 pCi/L confidence bound on each given reported measurement so that the typical surface water background data provided by RadNet may be subject to measurement uncertainty of up to 100 pCi/L.

The radio-analytical laboratory counts tritium results to an HDI-specified LLD of 200 pCi/L with a typical uncertainty of +/-100 pCi/L. Therefore, sample results reported by TBE near this LLD cannot be distinguished from natural background concentrations in surface water.

2019 OCGS GWPPR

IV. Results and Discussion A. Program Exceptions There were no program exceptions in 2019.

B. Groundwater Results Samples were collected from on-site locations in accordance with the station radiological groundwater protection program. As reported in GHDs 2019 Hydrogeologic Investigation Report, groundwater flow in the vicinity of the Torus Water Storage Tank and the Condensate Storage Tank is towards the intake and discharge canals.

Tritium Samples from 34 locations were analyzed for tritium activity. Tritium was detected in 10 of 108 samples. The values ranged from <172 to 1,590 pCi/L. The well with the highest concentration was MW-56I.

(Table B-I.1, Appendix B)

Strontium Strontium-89 and Strontium-90 were not detected in any location sampled in 2019. (Table B-I.1, Appendix B)

Gross Alpha and Gross Beta (dissolved and suspended)

Gross Alpha and Gross Beta analyses in the dissolved and suspended fractions were performed on groundwater samples during the second and third quarters in 2019. There were 30 samples taken from 20 groundwater well locations. Gross Alpha (dissolved) was detected in 3 samples. The concentrations ranged from 1.2 to 2.2 pCi/L. Gross Alpha (suspended) was detected in 14 samples and ranged from 1.7 to 35.4 pCi/L. Gross Beta (dissolved) was detected in 24 samples and ranged from 1.1 to 22.1 pCi/L. Gross Beta (suspended) was detected in 16 samples and ranged from 2.5 to 52.1 pCi/L. (Table B-I.1, Appendix B)

Gamma Emitters The naturally occurring gamma-emitting nuclide K-40 was detected in 2 of 55 samples analyzed during 2019. The concentrations ranged from 90 to 100 pCi/L. (Table B-I.2, Appendix B).

Hard-To-Detect Hard-To-Detect analyses were not performed on groundwater samples in 2019. (Table B-I.3, Appendix B) 2019 OCGS GWPPR

C. Surface Water Results Samples were collected from on-site locations in accordance with the station radiological groundwater protection program. Analytical results and anomalies are discussed below:

Tritium Samples from 7 locations were analyzed for tritium activity. Tritium was found in 1 of 23 samples at a concentration of 211 pCi/L.

(Table B-II.1, Appendix B)

Gross Alpha and Gross Beta (dissolved and suspended)

Gross Alpha and Gross Beta analyses in the dissolved and suspended fractions are not required on a routine basis and were not analyzed in 2019.

Gamma Emitters No gamma-emitting nuclides were detected in any surface water sample in 2019. (Table B-II.2, Appendix B)

Hard-To-Detect Hard-To-Detect analyses are not required on a routine basis and were not analyzed in 2019.

D. Precipitation Water Results Precipitation samples were collected from onsite and offsite locations in accordance with the station radiological groundwater protection program.

Analytical results and anomalies are discussed below:

Tritium Samples from five locations were collected from onsite and offsite monitoring locations and analyzed for tritium activity. No detectable tritium (greater than the MDC) was found in any precipitation water sample during 2019. (Table B-III.1, Appendix B)

E. Summary of Results - Inter-Laboratory Comparison Program Inter-Laboratory Comparison Program results for TBE and Environmental Inc. (Midwest Labs) are presented in the 2019 Oyster Creek AREOR.

This report is part of the AREOR.

F. Leaks, Spills, and Releases There were no abnormal liquid releases during 2019.

2019 OCGS GWPPR

G. Trends Active remediation of tritium in groundwater due to the spills that occurred in 2009 was initiated in October 2010. Trending of the data due to active remediation is on-going. Continuous remediation was terminated in October 2019 with State of New Jersey concurrence. Overall, the station has seen a decreasing trend in tritium values to the point where ground water tritium is below the ODCM LLD.

H. Investigations GHD Services Inc. performed an independent assessment of the tritium plume. The results of their assessment can be found in References 1, 2 and 3.

I. Actions Taken

1. Compensatory Actions Active remediation of tritium in groundwater due to the spills that occurred in 2009 was initiated in October, 2010.

2. Installation of Monitoring Wells The following wells were installed in 2010 to better characterize and monitor the tritium plume and site hydrology:

Well Number Formation Well Installation Date W-58 I Cohansey July W-59 I Cohansey March W-60 I Cohansey July W-61 I Cohansey July W-62 Cape May March W-63 I Cohansey July W-64 Cape May March W-65 Cape May March W-66 I Cohansey July W-67 Cape May March W-68 I Cohansey July W-69 I Cohansey July W-70 I Cohansey July W-71 Cape May August W-72 Cape May August W-73 Cohansey October Pumping well 2019 OCGS GWPPR

3. Actions to Recover/Reverse Plumes Oyster Creek Generating Station addressed the tritium in groundwater through continuous pumping of groundwater from of W-73 to the intake structure. Remediation of groundwater progressed to the stage where this program was terminated in the 4th quarter of with State of New Jersey concurrence. Should groundwater tritium levels regress initiating an adverse trend, the ODCM has provisions to restore ground water remediation using well 73 in batch or continuous mode.

V. References

1. Conestoga Rovers and Associates, Hydrogeologic Investigation Report, Fleetwide Assessment, Oyster Creek Generating Station, Forked River, New Jersey, Ref. No. 055875 (6), April 2011

2. Conestoga Rovers and Associates, Site Investigation Report, Oyster Creek Generating Station, Forked River, New Jersey, Ref. No. 055875 (4), August 2009

3. Conestoga Rovers and Associates, Remedial Investigation Workplan, Oyster Creek Generating Station, Forked River, New Jersey, Ref. No. 055875 (5),

October 2009 2019 OCGS GWPPR

Intentionally left blank 2019 OCGS GWPPR

APPENDIX A LOCATION DESIGNATION 2019 OCGS GWPPR

Intentionally left blank 2019 OCGS GWPPR

TABLE A-1: Radiological Groundwater Protection Program - Sampling Locations, Oyster Creek Generating Station, 2019 Oyster Creek Generating Station RGPP Sample Point List RGPP Aquifer or Sample Well GPS Tritium Depth Sample Water Identification Location Coordinates Alert (ft) Point Body Number (Northing/Easting) Value Designation Monitored North 358373.33 2,000 DWN Domestic 300.0 B Kirkwood 574672.98 pCi/L Well South 356955.90 2,000 DWS Domestic 145.0 B Kirkwood 574616.69 pCi/L Well E of ISFSI

- 357632.49 21.0 2,000 LW-1 I Cape May (microwave 575569.96 pCi/L zone)

E of ISFSI

- 357645.30 21.0 2,000 LW-2 I Cape May (microwave 575581.92 pCi/L zone)

E of ISFSI

- 357630.20 21.0 2,000 LW-3 D Cape May (microwave 575575.52 pCi/L zone)

East of ISFSI - 357652.78 49.0 2,000 LW-4 D Cohansey (microwave 575573.75 pCi/L zone)

SW of 357380.76 2,000 MW-1A-2A MFOT 24.0 D Cape May 575043.44 pCi/L Moat East of 358551.94 2,000 MW-1G-1A fueling 20.0 I Cape May 575308.91 pCi/L station East of 358550.57 45.0 2,000 MW-1G-1B fueling I Cohansey 575316.19 pCi/L station Roadway -

357598.17 2,000 MW-1I-1A NW of 19.0 D Cape May 574412.70 pCi/L TWST Roadway -

357574.80 2,000 MW-1I-2A SE of 17.5 D Cape May 574493.50 pCi/L TWST Roadway - 357297.90 2,000 MW-15K-1A 19.0 D Cape May Intake 574469.50 pCi/L Yard - W 357573.30 2,000 MW-16D of MAC 25.0 D Cape May 574746.50 pCi/L Building 2019 OCGS GWPPR

TABLE A-1: Radiological Groundwater Protection Program - Sampling Locations, Oyster Creek Generating Station, 2019 Oyster Creek Generating Station RGPP Sample Point List RGPP Aquifer or Sample Well GPS Tritium Depth Sample Water Identification Location Coordinates Alert (ft) Point Body Number (Northing/Easting) Value Designation Monitored Finninger 2,000 MW-24-2A Farm - 356838.52 18.0 I Cape May pCi/L near DSB 579470.94 Finninger 356828.49 2,000 MW-24-3A Farm - 17.0 I Cape May 578969.05 pCi/L near DSB Main 2,000 Surface MCD Condenser N/A N/A SW pCi/L Water Discharge Intake 2,000 Surface SW-1 N/A N/A SW Canal pCi/L Water RT 9 2,000 Surface SW-2 South N/A N/A SW pCi/L Water Bridge 2,000 Surface SW-3 Fire Pond N/A N/A SW pCi/L Water Dilution Pump 357029.86 2,000 W-1 50.0 I Cohansey Area - 574140.61 pCi/L West Bank North Yard 358311.70 2,000 W-1A 50.0 B Cohansey Area 574679.00 pCi/L North Yard 358312.80 2,000 W-1B 20.0 I Cape May Area 574685.40 pCi/L West end 357149.22 60.0 2,000 W-1C I Cohansey of backsite 572741.00 pCi/L West end 357151.55 150.0 2,000 W-1K of I Kirkwood 572728.77 pCi/L backsite S of EDG 356965.65 57.0 2,000 W-2 I Cohansey Bldg 574555.73 pCi/L Field - W 358105.00 2,000 W-2A of North 50.0 I Cohansey 574348.60 pCi/L Yard Bldg 2019 OCGS GWPPR

TABLE A-1: Radiological Groundwater Protection Program - Sampling Locations, Oyster Creek Generating Station, 2019 Oyster Creek Generating Station RGPP Sample Point List RGPP Aquifer or Sample Well GPS Tritium Depth Sample Water Identification Location Coordinates Alert (ft) Point Body Number (Northing/Easting) Value Designation Monitored Field - W of North 358110.30 2,000 W-2B 20.0 B Cape May Yard 574348.50 pCi/L Building Forked 357923.67 60.0 2,000 W-2C River CT I Cohansey 573809.92 pCi/L Site Forked 358030.88 150.0 2,000 W-2K River CT I Kirkwood 573762.54 pCi/L Site Intake -

357173.00 24.0 2,000 W-3 Access D Cape May 574499.10 pCi/L Road Plant 358067.92 50.0 2,000 W-3A Access I Cohansey 575664.22 pCi/L Road Plant 358070.58 2,000 W-3B Access 20.0 I Cape May 575656.25 pCi/L Road Finninger Farm - N 356595.30 60.0 2,000 W-3C I Cohansey of 576663.33 pCi/L Discharge Finninger Farm - N 356602.17 2,000 W-3K 100.0 I Kirkwood of 576675.04 pCi/L Discharge Intake -

357176.40 2,000 W-4 Access 55.0 D Cohansey 574497.70 pCi/L Road SE of 356913.30 2,000 W-4A OCAB 575387.10 50.0 B Cohansey pCi/L Building SE of 356916.40 2,000 W-4B OCAB 20.0 B Cape May 575388.90 pCi/L Building Finninger 359305.61 60.0 2,000 W-4C Farm - S of I Cohansey 575867.58 pCi/L Intake Finninger 359321.83 2,000 W-4K Farm - S of 100.00 I Kirkwood 575874.07 pCi/L Intake 2019 OCGS GWPPR

TABLE A-1: Radiological Groundwater Protection Program - Sampling Locations, Oyster Creek Generating Station, 2019 Oyster Creek Generating Station RGPP Sample Point List RGPP Aquifer or Sample Well GPS Tritium Depth Sample Water Identification Location Coordinates Alert (ft) Point Body Number (Northing/Easting) Value Designation Monitored NW Yard area, near 357510.95 2,000 W-5 20.5 D Cape May Fire Water 574374.05 pCi/L Tank Finninger Farm - E 356758.59 2,000 W-5C 60.0 B Cohansey of dredge 580642.26 pCi/L spoils Finninger Farm - E 356743.81 2,000 W-5K 150.0 B Kirkwood of dredge 580646.48 pCi/L spoils NW Yard -

near Fire 357514.02 2,000 W-6 52.0 D Cohansey Water 574373.77 pCi/L Tank NE - 357074.46 2,000 W-7 20.0 D Cape May Building 4 574713.08 pCi/L Roadway -

357289.29 2,000 W-9 NE of SAS 20.0 D Cape May 574892.74 pCi/L Building NW of SAS 357286.29 2,000 W-10 60.0 D Cohansey Building 574890.61 pCi/L Yard - NW 357669.10 2,000 W-12 of DWPC 20.0 D Cape May 574755.60 pCi/L Building Yard - NW 357666.00 2,000 W-13 of DWPC 50.0 D Cohansey 574755.90 pCi/L Building Yard - SW 357702.41 2,000 W-14 of 53.0 D Cohansey 575018.75 pCi/L Warehouse Yard - SW 357705.83 2,000 W-15 of 20.0 D Cape May 575017.70 pCi/L Warehouse Yard - E of 357967.26 2,000 W-16 20.0 D Cape May LLRW 574933.03 pCi/L Road/ Exit 358078.05 2,000 W-17 150.0 I Kirkwood Near W-3A 575667.14 pCi/L 2019 OCGS GWPPR

TABLE A-1: Radiological Groundwater Protection Program - Sampling Locations, Oyster Creek Generating Station, 2019 Oyster Creek Generating Station RGPP Sample Point List RGPP Aquifer or Sample Well GPS Tritium Depth Sample Water Identification Location Coordinates Alert (ft) Point Body Number (Northing/Easting) Value Designation Monitored Near 357005.78 2,000 W-18 EDG 20.0 I Cape May 574621.6 pCi/L Building Near 357077.91 2,000 W-19 EDG 20.0 I Cape May 574633.23 pCi/L Building SW of 356927.46 2,000 W-20 EDG 20.0 I Cape May 574542.59 pCi/L Building Near 357009.15 2,000 W-21 EDG 20.0 I Cape May 574518.22 pCi/L Building Near 357024.50 2,000 W-22 EDG 39.0 I Cape May 574590.19 pCi/L Building Near 357054.89 2,000 W-23 EDG 20.0 I Cape May 574564.88 pCi/L Building South of TB 357128.94 2,000 W-24 W of old 19.0 D Cape May 574650.77 pCi/L Machine Shop Near 356962.59 2,000 W-25 EDG 20.0 I Cape May 574677.59 pCi/L Building Near 357006.60 2,000 W-26 EDG 20.0 I Cape May 574644.03 pCi/L Building Near 357042.43 2,000 W-27 EDG 20.0 I Cape May 574636.35 pCi/L Building Near 356991.29 2,000 W-28 EDG 19.5 I Cape May 574573.64 pCi/L Building Near 357012.62 2,000 W-29 EDG 19.5 I Cape May 574568.69 pCi/L Building Near 357058.00 2,000 W-30 EDG 19.5 I Cape May 574516.71 pCi/L Building 2019 OCGS GWPPR

TABLE A-1: Radiological Groundwater Protection Program - Sampling Locations, Oyster Creek Generating Station, 2019 Oyster Creek Generating Station RGPP Sample Point List RGPP Aquifer or Sample Well GPS Tritium Depth Sample Water Identification Location Coordinates Alert (ft) Point Body Number (Northing/Easting) Value Designation Monitored Near 357051.78 2,000 W-31 EDG 19.5 I Cape May 574495.62 pCi/L Building Near 356978.58 2,000 W-32 EDG 19.5 I Cape May 574528.44 pCi/L Building Near 357026.93 2,000 W-33 EDG 19.5 I Cape May 574499.17 pCi/L Building South of TB 357196.14 2,000 W-34 W of old 40.0 D Cohansey 574649.43 pCi/L Machine Shop Between CST and 357368.21 2,000 MW-50 20.0 E Cape May Intake 574436.80 pCi/L Structure Near 357378.30 2,000 MW-51 20.0 E Cape May CST 574480.80 pCi/L Near 357400.90 2,000 MW-52 Intake 20.0 D Cape May 574353.00 pCi/L Structure Near end of CW 357272.80 2,000 MW-53 20.0 D Cape May discharge 574447.60 pCi/L piping Near 357276.20 2,000 MW-54 Intake 20.0 E Cape May 574311.70 pCi/L Structure Between CST and 357354.88 2,000 MW-55 30.0 E Cape May Intake 574440.07 pCi/L Structure By 357305.30 2,000 MW-56I NaOCl 52.0 E Cohansey 574465.50 pCi/L tanks Near 357343.71 2,000 MW-57I Intake 50.0 E Cohansey 574373.89 pCi/L Structure Near 357346.70 2,000 MW-58I Intake 72.0 D Cohansey 574377.28 pCi/L Structure 2019 OCGS GWPPR

TABLE A-1: Radiological Groundwater Protection Program - Sampling Locations, Oyster Creek Generating Station, 2019 Oyster Creek Generating Station RGPP Sample Point List RGPP Aquifer or Sample Well GPS Tritium Depth Sample Water Identification Location Coordinates Alert (ft) Point Body Number (Northing/Easting) Value Designation Monitored Intake Roadway 357422.14 2,000 MW-59I 44.0 D Cohansey

- NW of 574406.38 pCi/L CST Near 357346.55 2,000 MW-60I Intake 92.0 D Cohansey 574373.88 pCi/L Structure Between CST and 357328.64 2,000 MW-61I 72.0 E Cohansey Intake 574444.45 pCi/L Structure NW Corner of 357467.93 2,000 MW-62 25.0 D Cape May Turbine 574524.10 pCi/L Bldg Between CST and 357329.40 2,000 MW-63I 92.0 D Cohansey Intake 574447.67 pCi/L Structure Near 357343.96 2,000 MW-64 Intake 25.0 E Cape May 574377.88 pCi/L Structure Intake Roadway 357421.00 2,000 MW-65 25.0 D Cape May

- NW of 574402.55 pCi/L CST SE of 357320.44 2,000 MW-66I Reactor 80.0 D Cohansey 574889.18 pCi/L Bldg West side of 357401.99 2,000 MW-67 25.0 E Cape May Turbine 574540.38 pCi/L Bldg SE of 357323.83 2,000 MW-68I Reactor 100.0 D Cohansey 574897.64 pCi/L Bldg Yard -

NW of 357664.03 2,000 MW-69I 78.0 D Cohansey DWPC 574760.93 pCi/L Building Yard -

NW of 357670.57 2,000 MW-70I 98.0 D Cohansey DWPC 574759.18 pCi/L Building S of 357365.52 2,000 MW-71 Reactor 25.0 D Cape May 574841.89 pCi/L Bldg 2019 OCGS GWPPR

TABLE A-1: Radiological Groundwater Protection Program - Sampling Locations, Oyster Creek Generating Station, 2019 Oyster Creek Generating Station RGPP Sample Point List RGPP Aquifer or Sample Well GPS Tritium Depth Sample Water Identification Location Coordinates Alert (ft) Point Body Number (Northing/Easting) Value Designation Monitored N of Reactor 357549.87 2,000 MW-72 25.0 D Cape May Bldg 574788.52 pCi/L Remediation MW-73 N/A N/A N/A N/A N/A System

• Tritium sampling frequency based upon agreement made with the NJDEP on 04/26/13.

D = Daily W = Weekly M = Monthly S = Semi-annual B = Biennial 2019 OCGS GWPPR

Figure A-1 Sampling Locations - Selected Cohansey and Cape May Formation Wells, Oyster Creek Generating Station, 2019 2019 OCGS GWPPR

Figure A-1 Sampling Locations - Selected Cohansey and Cape May Formation Wells, Oyster Creek Generating Station, 2019 2019 OCGS GWPPR

APPENDIX B DATA TABLES 2019 OCGS GWPPR

Intentionally left blank 2019 OCGS GWPPR

TABLE B-I.1 CONCENTRATIONS OF TRITIUM, STRONTIUM, GROSS ALPHA, AND GROSS BETA IN GROUNDWATER SAMPLES COLLECTED AS PART OF THE RADIOLOGICAL GROUNDWATER PROTECTION PROGRAM, OYSTER CREEK GENERATING STATION, 2019 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 Sr-89 Sr-90 Gr-A (Dis) Gr-A (Sus) Gr-B (Dis) Gr-B (Sus)

MW-1A-2A 04/18/19 < 173 MW-1I-1A 01/15/19 < 196 MW-1I-1A 04/16/19 < 193 < 5.6 < 0.4 < 0.4 < 1.4 1.1 +/- 0.6 < 1.5 MW-1I-1A 07/23/19 < 192 MW-1I-1A 10/08/19 < 192 MW-1I-2A 01/15/19 < 194 MW-1I-2A 04/16/19 < 180 < 9.4 < 0.8 < 0.3 < 1.3 < 0.9 < 1.5 MW-1I-2A 07/23/19 < 194 MW-1I-2A 10/08/19 < 192 MW-15K-1A 01/15/19 < 199 MW-15K-1A 04/16/19 < 193 < 7.3 < 0.5 < 0.7 < 3.9 < 2.0 6.4 +/- 3.0 MW-15K-1A 04/16/19 Duplicate < 193 < 5.3 < 0.5 < 0.7 7.6 +/- 1.5 < 2.1 6.3 +/- 1.7 MW-15K-1A 07/23/19 < 191 MW-15K-1A 10/08/19 < 190 < 4.3 < 0.5 < 0.7 8.0 +/- 4.5 4.6 +/- 1.3 26.4 +/- 5.1 MW-16D 01/16/19 < 197 MW-16D 04/17/19 < 194 < 7.4 < 0.4 < 0.7 < 1.3 2.2 +/- 0.9 < 1.5 MW-16D 07/24/19 < 194 MW-16D 10/09/19 < 188 MW-52 04/17/19 < 179 MW-53 04/18/19 < 178 MW-54 04/16/19 < 181 MW-55 01/15/19 < 195 MW-55 04/16/19 < 178 < 4.7 < 0.6 < 0.5 2.4 +/- 1.2 7.4 +/- 1.1 3.6 +/- 1.3 MW-55 07/23/19 < 189 MW-55 10/08/19 < 187 < 5.6 < 0.8 < 0.6 2.3 +/- 1.1 2.4 +/- 0.6 2.5 +/- 1.2 MW-56I 01/15/19 793 +/- 157 MW-56I 04/16/19 1140 +/- 184 < 6.1 < 0.7 < 0.5 < 0.6 4.8 +/- 1.0 < 1.8 MW-56I 07/23/19 1590 +/- 230 MW-56I 10/08/19 815 +/- 160 < 5.0 < 0.7 < 0.8 < 1.4 5.4 +/- 0.8 < 1.6 MW-57I 01/15/19 704 +/- 151 MW-57I 04/16/19 693 +/- 143 < 3.2 < 0.6 < 0.6 3.2 +/- 1.2 16.9 +/- 1.5 3.0 +/- 1.2 MW-57I 07/23/19 676 +/- 150 MW-57I 10/08/19 582 +/- 139 < 4.9 < 0.7 < 0.7 1.7 +/- 1.0 15.2 +/- 1.3 3.4 +/- 1.3 MW-59I 01/15/19 < 192 MW-59I 04/16/19 < 193 < 2.9 < 0.7 < 0.6 < 0.9 3.4 +/- 1.0 < 2.4 MW-59I 07/23/19 < 189 MW-59I 10/08/19 < 187 MW-61I 01/15/19 < 192 MW-61I 04/16/19 < 191 < 6.7 < 0.4 < 0.3 < 0.5 1.3 +/- 0.5 < 1.4 MW-61I 07/23/19 < 197 MW-61I 10/08/19 < 187 MW-61I 10/08/19 Duplicate < 188 MW-61I 10/08/19 EIML < 151 MW-62 01/15/19 < 195 MW-62 04/16/19 < 191 < 4.5 < 0.4 < 0.8 7.0 +/- 2.9 2.9 +/- 1.4 8.4 +/- 3.1 MW-62 07/23/19 < 191 MW-62 10/08/19 < 188 MW-64 01/15/19 < 193 MW-64 01/15/19 Duplicate < 196 MW-64 04/16/19 < 190 < 3.7 < 0.7 < 2.7 35.4 +/- 7.3 < 7.6 52.1 +/- 8.0 MW-64 04/16/19 Duplicate < 191 < 3.8 < 0.6 1.2 +/- 0.7 7.9 +/- 1.6 4.8 +/- 1.5 8.9 +/- 1.7 MW-64 07/23/19 < 196 MW-64 07/23/19 Duplicate < 179 MW-64 10/08/19 < 188 MW-64 10/08/19 Duplicate < 189 MW-64 10/08/19 EIML < 151 Bolded values indicate LLD was not met due to high solid content in the sample B-1 2019 OCGS GWPPR

TABLE B-I.1 CONCENTRATIONS OF TRITIUM, STRONTIUM, GROSS ALPHA, AND GROSS BETA IN GROUNDWATER SAMPLES COLLECTED AS PART OF THE RADIOLOGICAL GROUNDWATER PROTECTION PROGRAM, OYSTER CREEK GENERATING STATION, 2019 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 Sr-89 Sr-90 Gr-A (Dis) Gr-A (Sus) Gr-B (Dis) Gr-B (Sus)

MW-65 01/15/19 < 189 MW-65 04/16/19 < 191 < 6.2 < 0.6 2.2 +/- 1.1 5.3 +/- 1.2 4.8 +/- 1.9 6.1 +/- 1.6 MW-65 07/23/19 < 174 MW-65 10/08/19 < 192 < 4.5 < 0.6 1.9 +/- 0.9 < 6.0 22.1 +/- 2.1 18.8 +/- 4.4 MW-67 01/15/19 223 +/- 130 MW-67 04/16/19 295 +/- 131 < 7.1 < 0.7 < 0.3 2.0 +/- 1.3 4.1 +/- 0.8 3.4 +/- 1.6 MW-67 07/23/19 < 178 MW-67 10/08/19 < 188 < 5.2 < 0.7 < 0.4 1.7 +/- 1.0 2.8 +/- 0.6 2.5 +/- 1.2 MW-71 01/16/19 < 199 MW-71 01/16/19 Duplicate < 200 MW-71 04/18/19 < 189 < 3.5 < 0.6 < 0.4 2.9 +/- 1.3 2.2 +/- 0.7 2.6 +/- 1.3 MW-71 04/18/19 Duplicate < 189 < 6.4 < 0.4 < 0.4 < 0.8 2.5 +/- 0.8 < 1.7 MW-71 07/24/19 < 175 MW-71 07/24/19 Duplicate < 179 MW-71 10/09/19 < 190 MW-71 10/09/19 Duplicate < 189 MW-71 10/09/19 EIML < 151 MW-72 01/15/19 < 197 MW-72 04/17/19 < 190 < 6.1 < 0.6 < 0.3 < 0.7 2.2 +/- 0.7 < 1.6 MW-72 07/24/19 < 180 MW-72 10/09/19 < 189 W-1A 04/18/19 < 187 W-3 01/15/19 < 198 W-3 04/16/19 < 192 < 5.2 < 0.7 < 0.9 < 3.2 < 2.3 < 3.6 W-3 07/23/19 < 196 W-3 10/08/19 < 200 W-4 04/16/19 < 179 W-4A 04/18/19 < 189 W-5 01/15/19 < 191 W-5 01/15/19 Duplicate < 194 W-5 04/17/19 < 178 < 6.4 < 0.4 < 2.9 < 0.9 5.0 +/- 1.5 < 1.5 W-5 04/17/19 Duplicate < 176 < 8.8 < 0.8 < 0.3 < 0.9 1.7 +/- 0.6 < 1.5 W-5 07/23/19 < 192 W-5 07/23/19 Duplicate < 194 W-5 10/08/19 < 197 W-5 10/08/19 Duplicate < 192 W-5 10/08/19 EIML < 151 W-6 04/17/19 < 175 W-9 01/16/19 < 194 W-9 04/18/19 < 172 < 3.4 < 0.8 < 0.6 < 0.9 10.0 +/- 1.3 < 1.5 W-9 07/24/19 < 188 W-9 10/09/19 < 181 W-10 04/18/19 < 173 W-12 01/16/19 < 195 W-12 04/17/19 < 177 < 4.2 < 0.6 < 0.7 2.2 +/- 0.8 < 2.7 4.2 +/- 1.7 W-12 07/24/19 < 190 W-12 10/09/19 < 185 W-13 04/17/19 < 176 W-14 04/18/19 < 183 W-15 04/18/19 < 178 W-16 04/17/19 < 178 W-24 04/18/19 < 175 W-34 01/16/19 < 195 W-34 04/18/19 < 180 < 5.2 < 0.8 < 0.5 < 0.9 8.0 +/- 1.1 < 1.5 W-34 07/23/19 < 197 W-34 10/08/19 < 184 B-2 2019 OCGS GWPPR

TABLE B-I.2 CONCENTRATIONS OF GAMMA EMITTERS IN GROUNDWATER SAMPLES COLLECTED AS PART OF THE RADIOLOGICAL GROUNDWATER PROTECTION PROGRAM, OYSTER CREEK GENERATING STATION, 2019 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE Be-7 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 MW-1A-2A 04/18/19 < 73 < 60 < 7 < 8 < 15 < 7 < 17 < 9 < 14 < 13 < 8 < 8 < 36 < 11 MW-1I-1A 04/16/19 < 46 < 104 < 6 < 6 < 15 < 8 < 11 < 6 < 11 < 10 < 6 < 5 < 32 < 10 MW-1I-2A 04/16/19 < 47 < 47 < 6 < 6 < 11 < 6 < 10 < 6 < 9 < 10 < 6 < 7 < 28 < 12 MW-15K-1A 01/15/19 < 61 < 48 < 4 < 7 < 14 < 8 < 17 < 8 < 11 < 11 < 5 < 6 < 33 < 12 MW-15K-1A 04/16/19 < 44 < 55 < 5 < 6 < 9 < 6 < 12 < 5 < 7 < 11 < 5 < 5 < 24 < 8 MW-15K-1A 04/16/19 Duplicate < 40 < 99 < 4 < 4 < 11 < 5 < 10 < 5 < 8 < 10 < 6 < 5 < 25 < 7 MW-15K-1A 07/23/19 < 69 < 134 < 7 < 7 < 15 < 6 < 16 < 8 < 13 < 14 < 7 < 8 < 34 < 9 MW-15K-1A 10/08/19 < 41 < 77 < 4 < 4 < 9 < 4 < 8 < 4 < 7 < 8 < 5 < 3 < 24 < 7 MW-16D 04/17/19 < 50 < 88 < 5 < 5 < 12 < 6 < 10 < 7 < 9 < 9 < 6 < 5 < 23 < 7 MW-52 04/17/19 < 48 < 43 < 5 < 5 < 10 < 5 < 8 < 5 < 8 < 9 < 6 < 5 < 21 < 8 MW-53 04/18/19 < 64 < 139 < 6 < 7 < 11 < 6 < 15 < 8 < 15 < 11 < 7 < 8 < 31 < 10 MW-54 04/16/19 < 47 < 114 < 6 < 7 < 12 < 7 < 14 < 5 < 13 < 12 < 6 < 6 < 27 < 10 MW-55 01/15/19 < 78 < 57 < 8 < 8 < 15 < 7 < 16 < 8 < 14 < 13 < 9 < 8 < 33 < 9 MW-55 04/16/19 < 51 < 153 < 6 < 6 < 13 < 7 < 17 < 7 < 13 < 13 < 8 < 6 < 30 < 10 B-3 MW-55 07/23/19 < 47 < 110 < 5 < 8 < 13 < 5 < 17 < 7 < 13 < 12 < 7 < 7 < 32 < 14 MW-55 10/08/19 < 37 < 106 < 5 < 6 < 13 < 7 < 15 < 7 < 11 < 12 < 5 < 5 < 34 < 14 MW-56I 01/15/19 < 46 < 142 < 6 < 4 < 14 < 6 < 15 < 7 < 13 < 11 < 7 < 7 < 26 < 9 MW-56I 04/16/19 < 54 < 114 < 5 < 5 < 17 < 7 < 13 < 6 < 11 < 13 < 7 < 6 < 35 < 11 MW-56I 07/23/19 < 58 < 54 < 7 < 7 < 14 < 7 < 13 < 7 < 11 < 14 < 7 < 8 < 28 < 8 MW-56I 10/08/19 < 40 < 79 < 5 < 5 < 10 < 5 < 8 < 5 < 7 < 8 < 4 < 5 < 21 < 9 MW-57I 01/15/19 < 44 < 134 < 6 < 6 < 16 < 6 < 16 < 6 < 11 < 11 < 8 < 7 < 28 < 11 MW-57I 04/16/19 < 55 < 60 < 6 < 6 < 15 < 7 < 11 < 7 < 10 < 10 < 6 < 7 < 35 < 14 MW-57I 07/23/19 < 59 < 125 < 7 < 8 < 16 < 6 < 22 < 8 < 10 < 14 < 8 < 9 < 38 < 12 MW-57I 10/08/19 < 59 < 132 < 7 < 6 < 15 < 7 < 15 < 8 < 13 < 13 < 8 < 8 < 39 < 15 MW-59I 04/16/19 < 64 < 61 < 7 < 7 < 14 < 7 < 16 < 7 < 10 < 12 < 7 < 7 < 31 < 12 MW-61I 04/16/19 < 68 < 119 < 4 < 6 < 14 < 5 < 17 < 6 < 14 < 12 < 8 < 6 < 27 < 14 MW-62 04/16/19 < 54 < 50 < 7 < 4 < 14 < 7 < 13 < 6 < 9 < 12 < 7 < 7 < 31 < 13 MW-64 04/16/19 < 57 < 143 < 6 < 7 < 14 < 7 < 15 < 7 < 12 < 13 < 7 < 7 < 28 < 14 MW-64 04/16/19 Reanalysis < 32 < 20 < 2 < 3 < 8 < 2 < 5 < 3 < 6 < 168 < 2 < 2 < 106 < 37 MW-64 04/16/19 < 57 < 132 < 6 < 6 < 12 < 7 < 9 < 7 < 10 < 10 < 7 < 6 < 36 < 7 MW-64 04/16/19 Reanalysis < 26 < 15 < 2 < 2 < 7 < 2 < 4 < 3 < 5 < 129 < 2 < 2 < 95 < 26 MW-65 01/15/19 < 53 < 124 < 5 < 6 < 13 < 6 < 11 < 7 < 11 < 9 < 7 < 7 < 23 < 7 MW-65 04/16/19 < 55 < 117 < 7 < 6 < 10 < 7 < 12 < 7 < 9 < 12 < 9 < 6 < 35 < 11 MW-65 07/23/19 < 47 < 100 < 7 < 6 < 12 < 6 < 12 < 7 < 12 < 10 < 6 < 6 < 25 < 11 MW-65 10/08/19 < 54 < 143 < 6 < 7 < 11 < 8 < 16 < 7 < 9 < 13 < 7 < 5 < 29 < 13 2019 OCGS GWPPR Bolded values indicate LLD was not met due to the age of the sample at the time of receipt at the laboratory

TABLE B-I.2 CONCENTRATIONS OF GAMMA EMITTERS IN GROUNDWATER SAMPLES COLLECTED AS PART OF THE RADIOLOGICAL GROUNDWATER PROTECTION PROGRAM, OYSTER CREEK GENERATING STATION, 2019 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE Be-7 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 MW-67 03/14/19 < 50 < 98 < 6 < 7 < 12 < 5 < 10 < 6 < 12 < 9 < 7 < 8 < 29 < 8 MW-67 04/16/19 < 50 < 69 < 7 < 8 < 14 < 7 < 12 < 7 < 13 < 12 < 7 < 7 < 36 < 9 MW-67 07/23/19 < 70 < 140 < 7 < 8 < 13 < 7 < 15 < 8 < 13 < 15 < 9 < 8 < 38 < 12 MW-67 10/08/19 < 56 < 92 < 6 < 7 < 14 < 8 < 12 < 8 < 13 < 13 < 8 < 8 < 33 < 9 MW-71 04/18/19 < 74 < 95 < 7 < 8 < 17 < 9 < 17 < 7 < 16 < 13 < 8 < 9 < 39 < 10 MW-71 04/18/19 Duplicate < 46 90 +/- 51 < 5 < 5 < 12 < 4 < 10 < 6 < 8 < 8 < 6 < 5 < 22 < 6 MW-72 04/17/19 < 49 < 116 < 7 < 7 < 9 < 2 < 10 < 7 < 10 < 10 < 8 < 7 < 36 < 14 W-1A 04/18/19 < 65 < 131 < 7 < 7 < 14 < 8 < 11 < 6 < 13 < 12 < 6 < 7 < 30 < 9 W-3 04/16/19 < 49 < 78 < 6 < 6 < 13 < 7 < 11 < 6 < 7 < 12 < 6 < 5 < 31 < 9 W-4 04/16/19 < 47 < 118 < 5 < 6 < 12 < 6 < 9 < 6 < 9 < 10 < 6 < 6 < 28 < 12 W-4A 04/18/19 < 46 < 106 < 6 < 5 < 10 < 3 < 11 < 5 < 10 < 8 < 6 < 5 < 27 < 9 W-5 04/17/19 < 68 < 107 < 9 < 7 < 17 < 11 < 12 < 7 < 11 < 14 < 8 < 8 < 37 < 14 W-5 04/17/19 Duplicate < 54 < 51 < 5 < 6 < 13 < 7 < 12 < 6 < 11 < 12 < 8 < 6 < 32 < 8 W-6 04/17/19 < 73 100 +/- 62 < 9 < 9 < 16 < 7 < 20 < 9 < 15 < 15 < 11 < 9 < 42 < 12 B-4 W-9 04/18/19 < 65 < 79 < 8 < 8 < 14 < 9 < 14 < 9 < 13 < 14 < 9 < 8 < 36 < 11 W-10 04/18/19 < 72 < 57 < 9 < 8 < 14 < 9 < 18 < 9 < 16 < 14 < 10 < 9 < 31 < 11 W-12 04/17/19 < 65 < 123 < 6 < 7 < 16 < 8 < 13 < 6 < 10 < 9 < 5 < 8 < 26 < 6 W-13 04/17/19 < 44 < 58 < 4 < 5 < 9 < 5 < 10 < 5 < 9 < 9 < 5 < 5 < 24 < 9 W-14 04/18/19 < 43 < 93 < 5 < 5 < 10 < 6 < 10 < 5 < 7 < 8 < 5 < 6 < 26 < 8 W-15 04/18/19 < 56 < 115 < 7 < 6 < 12 < 8 < 13 < 6 < 13 < 13 < 8 < 6 < 33 < 14 W-16 04/16/19 < 47 < 53 < 5 < 5 < 12 < 5 < 9 < 6 < 9 < 11 < 5 < 6 < 25 < 8 W-24 04/18/19 < 76 < 105 < 6 < 5 < 15 < 9 < 11 < 6 < 10 < 11 < 6 < 8 < 28 < 10 W-34 04/18/19 < 62 < 134 < 8 < 7 < 13 < 7 < 12 < 7 < 10 < 11 < 10 < 6 < 26 < 12 2019 OCGS GWPPR

TABLE B-I.3 CONCENTRATIONS OF HARD-TO-DETECTS IN GROUNDWATER SAMPLES COLLECTED AS PART OF THE RADIOLOGICAL GROUNDWATER PROTECTION PROGRAM, OYSTER CREEK GENERATING STATION, 2019 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE Am-241 Cm-242 Cm-243/244 Pu-238 Pu-239/240 U-234 U-235 U-238 Fe-55 Ni-63 NONE FOR 2019 B-5 2019 OCGS GWPPR

TABLE B-II.1 CONCENTRATIONS OF TRITIUM IN SURFACE WATER SAMPLES COLLECTED AS PART OF THE RADIOLOGICAL GROUNDWATER PROTECTION PROGRAM, OYSTER CREEK GENERATING STATION, 2019 RESULTS IN UNITS OF PCI/LITER + 2 SIGMA COLLECTION SITE DATE H-3 MCD 01/16/19 < 198 SEWER PIT 01/28/19 < 196 SEWER PIT 04/18/19 < 188 SEWER PIT 07/11/19 < 179 SEWER PIT 10/07/19 < 184 STORM DRAIN EAST 01/28/19 < 195 STORM DRAIN EAST 08/01/19 < 193 STORM DRAIN EAST 10/09/19 < 189 STORM DRAIN OUTFALL #2 01/28/19 < 190 STORM DRAIN OUTFALL #2 08/01/19 < 191 STORM DRAIN OUTFALL #2 11/19/19 < 197 SW-1 01/16/19 < 196 SW-1 04/15/19 < 192 SW-1 08/08/19 < 195 SW-1 10/07/19 < 190 SW-2 01/15/19 < 195 SW-2 04/17/19 211 +/- 125 SW-2 07/23/19 < 177 SW-2 10/07/19 < 187 SW-3 01/15/19 < 199 SW-3 04/17/19 < 191 SW-3 07/23/19 < 180 SW-3 10/07/19 < 191 B-6 2019 OCGS GWPPR

TABLE B-II.2 CONCENTRATIONS OF GAMMA EMITTERS IN SURFACE WATER SAMPLES COLLECTED AS PART OF THE RADIOLOGICAL GROUNDWATER PROTECTION PROGRAM, OYSTER CREEK GENERATING STATION, 2019 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE Be-7 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 SW-1 04/15/19 < 38 < 99 < 5 < 5 < 10 < 5 < 13 < 4 < 7 < 10 < 6 < 5 < 24 < 9 SW-2 04/17/19 < 54 < 58 < 5 < 6 < 14 < 7 < 15 < 7 < 8 < 11 < 7 < 7 < 29 < 10 SW-3 04/17/19 < 55 < 62 < 6 < 6 < 13 < 8 < 13 < 7 < 10 < 11 < 8 < 7 < 33 < 9 B-7 2019 OCGS GWPPR

TABLE B-II.3 CONCENTRATIONS OF HARD TO DETECTS IN SURFACE WATER SAMPLES COLLECTED AS PART OF THE RADIOLOGICAL GROUNDWATER PROTECTION PROGRAM, OYSTER CREEK GENERATING STATION, 2019 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE Am-241 Cm-242 Cm-243/244 Pu-238 Pu-239/240 U-234 U-235 U-238 Fe-55 Ni-63 NONE FOR 2019 B-8 2019 OCGS GWPPR

TABLE B-III.1 CONCENTRATIONS OF TRITIUM IN PRECIPITATION WATER SAMPLES COLLECTED AS PART OF THE RADIOLOGICAL GROUNDWATER PROTECTION PROGRAM, OYSTER CREEK GENERATING STATION, 2019 RESULTS IN UNITS OF PCI/LITER + 2 SIGMA COLLECTION SITE DATE H-3 2 01/08/19 < 188 2 04/02/19 < 192 2 07/23/19 < 176 2 10/08/19 < 185 3 01/08/19 < 190 3 04/02/19 < 191 3 07/23/19 < 178 3 10/08/19 < 188 4 01/08/19 < 188 4 04/02/19 < 191 4 07/23/19 < 180 4 10/08/19 < 183 5 01/08/19 < 189 5 04/02/19 < 193 5 07/23/19 < 181 5 10/08/19 < 186 6 01/08/19 < 190 6 04/02/19 < 196 6 07/23/19 < 185 6 10/08/19 < 186 B-9 2019 OCGS GWPPR

Intentionally left blank 2019 OCGS GWPPR