Text

Annual Radiological Environmental Operating Report
	ML21133A148
Person / Time
Site:	Quad Cities
Issue date:	05/13/2021
From:	Ohr K; Exelon Generation Co
To:	; Document Control Desk, Office of Nuclear Reactor Regulation
References
	SVP-21-028
	Download: ML21133A148 (110)
	v • d • e

Exelon G neration(w SVP-21-028 May 13, 2021 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C. 20555

Subject:

Quad Cities Nuclear Power Station, Units 1 and 2 Renewed Facility Operating License Nos. DPR-29 and DPR-30 NRC Docket Nos. 50-254 and 50-265 Annual Radiological Environmental Operating Report Pursuant to Technical Specifications Section 5.6.2, enclosed is the 2020 Radiological Environmental Operating Report for Quad Cities Nuclear Power Station. This Report contains the results of the Radiological Environmental Monitoring Program (REMP). In addition, the 2020 Radiological Groundwater Protection Program (RGPP) Report is included as Appendix F of the enclosure.

Should you have any questions concerning this letter, please contact Anna Wilson at (309) 227-3200.

R~ectf,~

/0k Kenneth S. Ohr Site Vice President Quad Cities Nuclear Power Station

Enclosure:

Annual Radiological Environmental Operating Report cc:

Regional Administrator - NRC Region Ill NRC Senior Resident Inspector-Quad Cities Nuclear Power Station

Enclosure Annual Radiological Environmental Operating Report

Docket No: 50-254 50-265 QUAD CITIES NUCLEAR POWER STATION UNITS 1 and 2 Annual Radiological Environmental Operating Report 1 January through 31 December 2020 Prepared By Teledyne Brown Engineering Environmental Services Quad Cities Nuclear Power Station Cordova, IL 61242 May 2021 Exelon Generation

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i Table Of Contents I. Summary and Conclusions.............................................................................................. 1 II. Introduction...................................................................................................................... 3 A. Ojectives of the REMP......................................................................................... 3 B. Implementation of the Objectives........................................................................ 3 C. Radiation and Radioactivity................................................................................. 3 D. Sources of Radiation........................................................................................... 4 III. Program Description....................................................................................................... 6 A. Sample Collection................................................................................................ 6 B. Sample Analysis.................................................................................................. 7 C. Data Interpretation............................................................................................... 8 D. Program Exceptions............................................................................................ 9 E. Program Changes............................................................................................. 10 IV. Results and Discussion............................................................................................... 11 A. Aquatic Environment......................................................................................... 11

1. Surface Water......................................................................................... 11

2. Ground Water......................................................................................... 11

3. Fish......................................................................................................... 12

4. Sediment................................................................................................. 12 B. Atmospheric Environment................................................................................. 12

1. Airborne.................................................................................................. 12

a. Air Particulates............................................................................. 12

b. Airborne Iodine............................................................................. 13

2. Terrestrial................................................................................................ 13

a. Milk............................................................................................... 13

b. Food Products.............................................................................. 13 C. Ambient Gamma Radiation............................................................................... 14 D. Independent Spent Fuel Storage...................................................................... 14 E. Land Use Survey............................................................................................... 14 F. Errata Data......................................................................................................... 15 G. Summary of Results - Inter-laboratory Comparison Program.......................... 15

ii Appendices Appendix A Radiological Environmental Monitoring Report Summary Tables Table A-1 Radiological Environmental Monitoring Program Annual Summary for Quad Cities Nuclear Power Station, 2020 Appendix B Location Designation, Distance & Direction, and Sample Collection &

Analytical Methods Tables Table B-1 Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, Quad Cities Nuclear Power Station, 2020 Table B-2 Radiological Environmental Monitoring Program - Summary of Sample Collection and Analytical Methods, Quad Cities Nuclear Power Station, 2020 Figures Figure B-1 Quad Cities REMP Sampling Locations - 2 Mile Radius, 2020 Figure B-2 Quad Cities REMP Sampling Locations - 9.3 Mile Radius, 2020 Appendix C Data Tables and Figures - Primary Laboratory Tables Table C-I.1 Concentrations of Gross Beta in Surface Water Samples Collected in the Vicinity of Quad Cities Nuclear Power Station, 2020 Table C-I.2 Concentrations of Tritium, Iron-55 and Nickel-63 in Surface Water Samples Collected in the Vicinity of Quad Cities Nuclear Power Station, 2020 Table C-I.3 Concentrations of Gamma Emitters in Surface Water Samples Collected in the Vicinity of Quad Cities Nuclear Power Station, 2020 Table C-II.1 Concentrations of Tritium in Ground Water Samples Collected in the Vicinity of Quad Cities Nuclear Power Station, 2020 Table C-II.2 Concentrations of Gamma Emitters in Ground Water Samples Collected in the Vicinity of Quad Cities Nuclear Power Station, 2020

iii Table C-III.1 Concentrations of Gamma Emitters in Fish Samples Collected in the Vicinity of Quad Cities Nuclear Power Station, 2020 Table C-IV.1 Concentrations of Gamma Emitters in Sediment Samples Collected in the Vicinity of Quad Cities Nuclear Power Station, 2020 Table C-V.1 Concentrations of Gross Beta in Air Particulate Samples Collected in the Vicinity of Quad Cities Nuclear Power Station, 2020 Table C-V.2 Monthly and Yearly Mean Values of Gross Beta Concentrations In Air Particulate Samples Collected in the Vicinity of Quad Cities Nuclear Power Station, 2020 Table C-V.3 Concentrations of Gamma Emitters in Air Particulate Samples Collected in the Vicinity of Quad Cities Nuclear Power Station, 2020 Table C-VI.1 Concentrations of I-131 in Air Iodine Samples Collected in the Vicinity of Quad Cities Nuclear Power Station, 2020 Table C-VII.1 Concentrations of I-131 in Milk Samples Collected in the Vicinity of Quad Cities Nuclear Power Station, 2020 Table C-VII.2 Concentrations of Gamma Emitters in Milk Samples Collected in the Vicinity of Quad Cities Nuclear Power Station, 2020 Table C-VIII.1 Concentrations of Gamma Emitters in Food Product Samples Collected in the Vicinity of Quad Cities Nuclear Power Station, 2020 Table C-IX.1 Quarterly DLR Results for Quad Cities Nuclear Power Station, 2020 Table C-IX.2 Annual DLR Results Quad Cities Nuclear Power Station, 2020 Figures Figure C-1 Surface Water - Gross Beta - Stations Q-33 and Q-34 (C) Collected in the Vicinity of QCNPS, 2000 - 2020 Figure C-2 Surface Water - Tritium - Stations Q-33 and Q-34 (C) Collected in the Vicinity of QCNPS, 2000 - 2020 Figure C-3 Ground Water - Tritium - Stations Q-35 and Q-36 Collected in the Vicinity of QCNPS, 2000 - 2020 Figure C-4 Air Particulates - Gross Beta - Stations Q-01 and Q-02 Collected in the Vicinity of QCNPS, 2000 - 2020 Figure C-5 Air Particulates - Gross Beta - Stations Q-03 and Q-04 Collected in the Vicinity of QCNPS, 2000 - 2020.

Figure C-6 Air Particulates - Gross Beta - Station Q-07 (C) Collected in the Vicinity of QCNPS, 2000 - 2010 Figure C-7 Air Particulates - Gross Beta - Stations Q-13 and Q-16 Collected in the Vicinity of QCNPS, 2005 - 2020

iv Figure C-8 Air Particulates - Gross Beta - Stations Q-37 and Q-38 Collected in the Vicinity of QCNPS, 2005 - 2020 Figure C-9 Air Particulates - Gross Beta - Stations Q-41 and Q-42 (C) Collected in the Vicinity of QCNPS, 2009 - 2020 Appendix D Inter-Laboratory Comparison Program Tables Table D-1 Analytics Environmental Radioactivity Cross Check Program Teledyne Brown Engineering, 2020 Table D-2 DOEs Mixed Analyte Performance Evaluation Program (MAPEP)

Teledyne Brown Engineering, 2020 Table D-3 ERA Environmental Radioactivity Cross Check Program Teledyne Brown Engineering, 2020 Appendix E Errata Data Appendix F Annual Radiological Groundwater Protection Program Report (ARGPPR)

I.

Summary and Conclusions In 2020, the Quad Cities Generating Station released to the environment through the radioactive effluent gaseous pathways, approximately 88.5 curies of noble gas, 2.06E-03 curies of fission and activation products, 29.3 curies of Carbon-14 and approximately 83.3 curies of tritium. The dose from both gaseous effluents was conservatively calculated for the Maximum Exposed Member of the Public. In 2020, Quad Cities Generating Station released to the environment, through the radioactive liquid effluent pathway, approximately 7.06E-01 curies of tritium and 2.45E-03 curies of fission and activation products. Included in the liquid totals are curies released as part of remediation of a 2018 leak. The results of those calculations and their comparison to the allowable limits were as follows:

NOTE: Percent of applicable limits are for Unit 1 and Unit 2 combined (Site)

Gaseous and liquid radiation doses to members of the public at locations Effluents Applicable Organ Estimated Dose Age Group Location

% of Applicable Limit Site Limit Unit Distance (meters)

Direction (toward)

Noble Gas Gamma - Air Dose 1.84E-03 All 1029 NNE 9.20E-03 20 mRad Noble Gas Beta - Air Dose 2.11E-04 All 1029 NNE 5.28E-04 40 mRad Iodine, Particulate C-14 & Tritium Total Body 4.41E-02 Child 1029 NNE 1.76E-01 25 mrem Iodine, Particulate C-14 & Tritium Bone 2.05E-01 Child 1029 NNE 6.83E-01 30 mrem Liquid Total Body 1.86E-04 Adult Mississippi River 3.10E-03 6

mrem Liquid Liver 2.97E-04 Teen Mississippi River 1.49E-03 20 mrem Skyshine Total Body 7.79E+00 All 800 N

3.12E+01 25 mrem 40CFR190 Total Body (Gas + Liq+

Skyshine) 7.84E+00 All 800 N

3.14E+01 25 mrem The doses as a result of the radiological effluents released from the Quad Cities Generating Station were a very small percentage of the allowable limits, with the exception of 40CFR190 whole body radiation which was calculated to be 31.4% of the 25 mrem/yr limit. The largest component of 40CFR190 dose is attributable to BWR skyshine from N-16. This value is conservatively calculated for the hypothetical maximum exposed member of the public.

Nitrogen-16 (N-16) is a byproduct of Hydrogen addition into the Reactor Coolant System (RCS). Hydrogen addition is performed to maintain RCS chemistry parameters that reduce corrosion potential. Due to its short half-life (7.13 seconds),

N-16 is not detectable as a plant effluent as it decays prior to reaching gaseous discharge pathways. Additionally, this dose is conservatively calculated instead of measured because an annual dose of 7.79E+00 mrem is too low to be reliably detected on the environmental dosimetry utilized by the station.

This report on the Radiological Environmental Monitoring Program (REMP) conducted for the Quad Cities Nuclear Power Station (QCNPS) by Exelon covers the period 01 January 2020 through 31 December 2020. During that time period, 1509 analyses were performed on 1455 samples. In assessing all the data gathered for this report and comparing these results with preoperational data, it was concluded that the operation of QCNPS had no adverse radiological impact on the environment.

Surface water samples were analyzed for concentrations of gross beta, tritium, iron, nickel and gamma-emitting nuclides. Ground water samples were analyzed for concentrations of tritium and gamma-emitting nuclides. No fission or activation products were detected. Gross beta activities detected were consistent with those detected in previous years and consistent with the control stations.

Fish (commercially and recreationally important species) and sediment samples were analyzed for concentrations of gamma-emitting nuclides. No fission or activation products were detected above the required LLD in any fish or sediment samples.

Air particulate samples were analyzed for concentrations of gross beta and gamma-emitting nuclides. No fission or activation products were detected.

High sensitivity iodine-131 (I-131) analyses were performed on air samples. No I-131 was detected.

Cow milk samples were analyzed for concentrations of I-131 and gamma-emitting nuclides. No I-131 was detected. Concentrations of naturally-occurring isotopes (K-40 averaging 1197 pCi/L) were consistent with those detected in previous years.

No fission or activation products were detected.

Food product samples were analyzed for concentrations of gamma-emitting nuclides.

No fission or activation products were detected.

Environmental gamma radiation measurements were performed quarterly using Optically Stimulated Luminescence Dosimeters (OSLD). Beginning in 2012, Exelon changed the type of dosimetry used for the Radiological Environmental Monitoring Program (REMP). Optically Stimulated Luminescent Dosimeters were deployed and Thermoluminescent Dosimeters (TLD) were discontinued. The relative comparison to control locations remains valid. OSLD technology is different than that used in a TLD but has the same purpose (to measure direct radiation).

II.

Introduction The Quad Cities Nuclear Power Station (QCNPS), consisting of two 2,957 MWth boiling water reactors owned and operated by Exelon Corporation, is located in Cordova, Illinois along the Mississippi River. Unit No.1 went critical on 16 March 1972. Unit No. 2 went critical on 02 December 1973. The site is located in northwestern Illinois, approximately 182 miles west of Chicago, Illinois.

This report covers those analyses performed by Teledyne Brown Engineering (TBE) and Landauer on samples collected during the period 1 January 2020 through 31 December 2020.

A.

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

1. Provide data on measurable levels of radiation and radioactive materials in 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 B.

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

1. Identifying significant exposure pathways

2. Establishing baseline radiological data of media within those pathways

3. Continuously monitoring those media before and during Station operation to assess Station radiological effects (if any) on man and the environment C.

Radiation and Radioactivity All matter is made of atoms. An atom is the smallest part into which matter can be broken down and still maintain all its chemical properties. Nuclear radiation is energy, in the form of waves or particles that is given off by unstable, radioactive atoms. Radioactive material exists naturally and has always been a part of our environment. The earth's crust, for example, contains radioactive uranium, radium, thorium and potassium. Some radioactivity is a result of nuclear weapons testing. Examples of radioactive fallout that is normally present in environmental samples are cesium-137 and strontium-90. Some examples of radioactive materials released from a nuclear power plant are cesium-137, iodine-131, strontium-90 and cobalt-60.

Radiation is measured in units of millirem; much like temperature is measured in degrees. A millirem is a measure of the biological effect of the energy deposited in tissue. The natural and man-made radiation dose received in one year by the average American is 300 to 400 mrem (References 2, 3, 4 in Table II.D-1 below). Radioactivity is measured in curies. A curie is that amount of radioactive material needed to produce 37,000,000,000 nuclear disintegrations per second. This is an extremely large amount of radioactivity in comparison to environmental radioactivity. That is why radioactivity in the environment is measured in picocuries. One picocurie is equal to one trillionth of a curie.

D.

Sources of Radiation As mentioned previously, naturally-occurring radioactivity has always been a part of our environment. Table II D-1 shows the sources and doses of radiation from natural and man-made sources.

Table II.D-1 Radiation Sources and Corresponding Dose (1)

NATURAL MAN-MADE Source Radiation Dose (millirem/year)

Source Radiation Dose (millirem/year)

Internal, inhalation (2) 228 Medical (3) 300 External, space 33 Consumer (4) 13 Internal, ingestion 29 Industrial(5) 0.3 External, terrestrial 21 Occupational 0.5 Weapons Fallout

<1 Nuclear Power Plants

<1 Approximate Total 311 Approximate Total 314 (1) Information from NCRP Reports 160 and 94 (2) Primarily from airborne radon and its radioactive progeny (3) Includes CT (147 mrem), nuclear medicine (77 mrem), interventional fluoroscopy (43 mrem) and conventional radiography and fluoroscopy (33 mrem)

(4) Primarily from cigarette smoking (4.6 mrem), commercial air travel (3.4 mrem), building materials (3.5 mrem), and mining and agriculture (0.8 mrem)

(5) Industrial, security, medical, educational, and research Cosmic radiation from the sun and outer space penetrates the earth's atmosphere and continuously bombards us with rays and charged particles.

Some of this cosmic radiation interacts with gases and particles in the atmosphere, making them radioactive in turn. These radioactive byproducts from cosmic ray bombardment are referred to as cosmogenic radionuclides.

Isotopes such as beryllium-7 and carbon-14 are formed in this way.

Exposure to cosmic and cosmogenic sources of radioactivity results in about 33 mrem of radiation dose per year.

Additionally, natural radioactivity is in our body and in the food we eat (about 29 millirem/yr), the ground we walk on (about 21 millirem/yr) and the air we breathe (about 228 millirem/yr). The majority of a person's annual dose results from exposure to radon and thoron in the air we breathe. These gases and their radioactive decay products arise from the decay of naturally-occurring uranium, thorium and radium in the soil and building products such as brick, stone and concrete. Radon and thoron levels vary greatly with location, primarily due to changes in the concentration of uranium and thorium in the soil. Residents at some locations in Colorado, New York, Pennsylvania, and New Jersey have a higher annual dose as a result of higher levels of radon/thoron gases in these areas. In total, these various sources of naturally-occurring radiation and radioactivity contribute to a total dose of about 311 mrem per year.

In addition to natural radiation, we are normally exposed to radiation from a number of man-made sources. The single largest doses from man-made sources result from therapeutic and diagnostic applications of x-rays and radiopharmaceuticals. The annual dose to an individual in the U.S. from medical and dental exposure is about 300 mrem. Consumer products, such as televisions and smoke detectors, contribute about 13 mrem/yr. Much smaller doses result from weapons fallout (less than 1 mrem/yr) and nuclear power plants. Typically, the average person in the United States receives about 314 mrem per year from man-made sources.

III.

Program Description A.

Sample Collection Samples for the QCNPS REMP were collected for Exelon Nuclear by ATI Environmental Inc. (Midwest Labs). This section describes the general sampling methods used by Environmental Inc. to obtain environmental samples for the QCNPS REMP in 2020. Sample locations and descriptions can be found in Table B-1 and Figures B-1 and B-2, Appendix B.

Aquatic Environment The aquatic environment was evaluated by performing radiological analyses on samples of surface water, ground water, fish and sediment. Surface water samples were collected weekly from two locations, Q-33 and Q-34 (Control).

Ground water samples were collected quarterly from two locations, Q-35 and Q-36. All water samples were collected in new containers, which were rinsed with source water prior to collection.

Fish samples comprising the edible portions of commercially and recreationally important species were collected semiannually at two locations, Q-24 and Q-29 (Control). Sediment samples composed of Recently-deposited substrate were collected at two locations semiannually, Q-39 and Q-40 (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 at ten locations (Q-01, Q-02, Q-03, Q-04, Q-13, Q-16, Q-37, Q-38, Q-41 and Q-42 (control)). 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 air particulate filters and air iodine samples were replaced weekly and sent to the laboratory for analysis.

Terrestrial Environment The terrestrial environment was evaluated by performing radiological analyses on samples of milk and food product. Milk samples were collected biweekly at one location (Q-26) from May through October, and monthly from November through April. All samples were collected in new plastic containers from the bulk tank, preserved with sodium bisulfite, and shipped promptly to the laboratory.

Food products were collected annually in July at five locations (Q-Control, Q-Quad 1, Q-Quad 2, Q-Quad 3, and Q-Quad 4). Various types of broadleaf and root vegetables were collected and placed in new plastic bags and sent to the laboratory for analysis.

Ambient Gamma Radiation Beginning in 2012, Exelon changed the type of dosimetry used for the Radiological Environmental Monitoring Program (REMP). Optically Stimulated Luminescent Dosimeters (OSLD) were deployed and Thermoluminescent Dosimeters (TLD) were discontinued. The relative comparison to control locations remains valid. OSLD technology is different than that used in a TLD but has the same purpose (to measure direct radiation).

Each location consisted of 2 OSLD sets. The OSLD locations were placed on and around the QCNPS site as follows:

An inner ring consisting of 15 locations (Q-101, Q-102, Q-103, Q-104, Q-105, Q-106, Q-107, Q-108, Q-109, Q-111, Q-112, Q-113, Q-114, Q-115 and Q-116).

These OSLDs are located in 15 of the 16 meteorological sectors in the general area of the site boundary (approximately 0.1 - 3 miles from the site). There are no OSLDs located in the SSW sector because this sector is located over water.

An outer ring consisting of 16 locations (Q-201, Q-202, Q-203, Q-204, Q-205, Q-206, Q-207, Q-208, Q-209, Q-210, Q-211, Q-212, Q-213, Q-214, Q-215 and Q-216). These OSLDs are located in each of the 16 meteorological sectors (approximately 6.0 - 8.0 km from the site)

An other set consisting of 9 locations (Q-01, Q-02, Q-03, Q-04, Q-13, Q-16, Q-37, Q-38 and Q-41). The locations are at each of the air sample stations around the site.

The balance of one location (Q-42) is the control site.

The specific OSLD locations were determined by the following criteria:

1. The presence of relatively dense population;

2. Site meteorological data taking into account distance and elevation for each of the sixteen 22.5 degree sectors around the site, where estimated annual dose from QCNPS, if any, would be most significant;

3. On hills free from local obstructions and within sight of the stack (where practical);

4. Near the closest dwelling to the stack in the prevailing downwind direction.

The OSLDs were exchanged quarterly and sent to Landauer for analysis.

B.

Sample Analysis This section describes the general analytical methodologies used by TBE to analyze the environmental samples for radioactivity for the QCNPS REMP in 2020 and the type of analyses. The analytical procedures used by the TBE laboratory are listed in Table B-2.

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

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

2. Concentrations of gamma emitters in ground and surface water, air particulates, milk, fish, sediment and vegetation

3. Concentrations of tritium (H-3) in ground and surface water

4. Concentrations of I-131 in air and milk

5. Ambient gamma radiation levels at various site environs

6. Concentrations of Iron-55 (Fe-55) and Nickel-63 (Ni-63) in surface water C.

Data Interpretation The radiological and direct radiation data collected prior to Quad Cities Nuclear Power Station becoming operational were used as a baseline with which these operational data were compared. For the purpose of this report, Quad Cities Nuclear Power Station was considered operational at initial criticality. In addition, data were compared to previous years' operational data for consistency and trending. 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 an a priori (a before the fact) estimate of a system (including instrumentation, procedure and sample type) and not as an a posteriori (after the fact) criteria for the presence of activity. All analyses were designed to achieve the required QCNPS detection capabilities for environmental sample analysis.

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

2. Net Activity Calculation and Reporting of Results Net activity for a sample is 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 effecting a negative number. An MDC is reported in all cases where positive activity was not detected.

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

For surface water, groundwater and vegetation 12 nuclides, manganese-54 (Mn-54), cobalt-58 (Co-58), iron-59 (Fe-59),

colbalt-60 (Co-60), zinc-65 (Zn-65), zirconium-95 (Zr-95), niobium-95 (Nb-95), I-131, cesium-134 (Cs-134), Cs-137, barium-140 (Ba-140), and lanthanum-140 (La-140) were reported.

For fish, sediment, air particulate and milk 11 nuclides, Mn-54, Co-58, Fe-59, Co-60, Zn-65, Nb-95, Zr-95, Cs-134, Cs-137 and Ba-140 and La-140 were reported.

For air iodine, one nuclide, I-131 was 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 2020 the QCNPS REMP had a sample recovery rate in excess of 98.0%.

Sample anomalies and missed samples are listed in the tables below:

Table D-1 LISTING OF SAMPLE ANOMALIES Sample Type Location Code Collection Date Reason AP/AI Q-13 01/02/20 Lower reading of 148.1 hrs. due to 6 days run caused by a pump failure; pump exchanged AP/AI Q-01, Q-02, Q-03, Q-04, Q-37, Q-38 01/17/20 Sample shipment misdirected - package recovered intact and resent to the lab 7 days later AI Q-37 04/17/20 Sample originally deemed lost was found in the collectors truck - sent for analysis on 04/28/20 OSLD 310-1/1A 04/30/20 OSLD not checked due to road closure WW Q-35, Q-36 07/10/20 Samples leaked during shipping; remaining amount deemed insufficient for analysis - samples recollected on 07/16/20 AP/AI Q-13 08/13/20 Lower reading of 146.7 hrs. during 7 days collection period due to a power outage caused by severe thunderstorms in the area AP/AI Q-16 08/13/20 Lower reading of 97.2 hrs. during 7 days collection period due to a power outage caused by severe thunderstorms in the area AP/AI Q-41 08/13/20 Lower reading of 136.5 hrs. during 7 days collection period due to a power outage caused by severe thunderstorms in the area AP/AI Q-42 08/13/20 Lower reading of 144.8 hrs. during 7 days collection period due to a power outage caused by severe thunderstorms in the area AP/AI Q-37 08/14/20 Lower reading of 121.2 hrs. during 7 days collection period due to a power outage caused by severe thunderstorms in the area AP/AI Q-38 08/14/20 Lower reading of 121.2 hrs. during 7 days collection period due to a power outage caused by severe thunderstorms in the area AP Q-02 08/14/20 Sample washed out by severe rain and wind Table D-2 LISTING OF MISSED SAMPLES Sample Type Location Code Collection Date Reason AP Q-04 01/03/20 Sample lost in field SW Q-33, Q-34 01/09/20 No sample; water frozen SW Q-33, Q-34 01/16/20 No sample; water frozen SW Q-33, Q-34 01/23/20 No sample; water frozen SW Q-33, Q-34 01/30/20 No sample; water frozen SW Q-33, Q-34 02/06/20 No sample; water frozen SW Q-33, Q-34 02/14/20 No sample; water frozen SW Q-33, Q-34 02/20/20 No sample; water frozen SW Q-33 02/27/20 No sample; water frozen SW Q-33, Q-34 April, 2020 Original sample composite lost during shipment. Sample partially recreated and lab unable to reach LLD due delay; discarded per station request.

AP/AI Q-13 06/18/20 Sample hose found entangled with no suction - filter appears white.

Hose trimmed and reattached. Samples sent but results possibly unreliable OSLD Q-111-1/1A 06/30/20 OSLD found missing during the quarterly exchange; area searched and samples not found OSLD Q-111-1/1A Q-112-2/2A Q-201-2/2A Q-212-2A 09/22/20 OSLDs found missing during the quarterly exchange; area searched and samples not found SW Q-33, Q-34 12/26/20 No sample; water frozen OSLD Q-111-2/2A Q-201-2/2A Q-209-1/1A Q-215-2/2A Q-216-2/2A 12/29/20 OSLDs found missing during the quarterly exchange; area searched and samples not found SW Q-33, Q-34 12/31/20 No sample; water frozen The overall sample recovery rate indicates that the appropriate procedures and equipment are in place to assure reliable program implementation.

E.

Program Changes There were no program changes in 2020.

IV.

Results and Discussion A.

Aquatic Environment

1. Surface Water Samples were taken weekly and composited monthly at two locations (Q-33 and Q-34). Of these locations only Q-33, located downstream, could be affected by Quad Cities effluent releases. The following analyses were performed:

Gross Beta Samples from all locations were analyzed for concentrations of gross beta (Table C-I.1, Appendix C). Gross beta activity was detected in 19 of 23 samples. The values ranged from 2.5 to 10.4 pCi/L. Concentrations detected were consistent with those detected in previous years (Figure C-1, Appendix C). The required LLD was met.

Tritium Quarterly composites of weekly collections were analyzed for tritium activity (Table C-I.2, Appendix C). No tritium activity was detected (Figure C-2, Appendix C). The 2000 pCi/L OCDM and contractually required 200 pCi/L LLDs were met.

Iron and Nickel Quarterly composites of monthly collections were analyzed for Fe-55 and Ni-63 (Table C-I.2, Appendix C). No Fe-55 or Ni-63 were detected. The required LLDs were met.

Gamma Spectrometry Samples from both locations were analyzed monthly for gamma-emitting nuclides (Table C-I.3, Appendix C). No nuclides associated with QCNPS were detected and all required LLDs were met.

2. Ground Water Quarterly grab samples were collected at two locations (Q-35 and Q-36).

Both locations could be affected by Quad Cities effluent releases. The following analyses were performed:

Tritium Quarterly grab samples from the locations were analyzed for tritium activity (Table C-II.1, Appendix C). No tritium activity was detected (Figure C-3, Appendix C). The 2000 pCi/L OCDM and contractually required 200 pCi/L LLDs were met.

Gamma Spectrometry Samples from all locations were analyzed for gamma-emitting nuclides (Table C-II.2, Appendix C). No nuclides associated with QCNPS were detected and all required LLDs were met.

3. Fish Fish samples comprised of various commercially and recreationally important species were collected at two locations (Q-24 and Q-29) semiannually. Location Q-24 could be affected by Quad Cities effluent releases. The following analysis was performed:

Gamma Spectrometry The edible portion of fish samples from both locations were analyzed for gamma-emitting nuclides (Table C-III.1, Appendix C). No nuclides associated with QCNPS were detected and all required LLDs were met.

4. Sediment Aquatic sediment samples were collected at two locations (Q-39 and Q-40) semiannually. The location Q-39, located downstream, could be affected by Quad Cities effluent releases. The following analysis was performed:

Gamma Spectrometry Sediment samples from Q-39 and Q-40 were analyzed for gamma-emitting nuclides (Table C-IV.1, Appendix C). No nuclides potentially associated with QCNPS were detected and all required LLDs were met.

B.

Atmospheric Environment

1. Airborne

a. Air Particulates Continuous air particulate samples were collected from ten locations on a weekly basis. The ten locations were separated into three groups: Near-field samplers within 4 km (2.5 miles) of the site (Q-01, Q-02, Q-03 and Q-04), far-field samplers between 4 and 10 km (2.5 - 6.2 miles) from the site (Q-13, Q-16, Q-37, Q-38 and Q-41) and the Control sampler between 10 and 30 km (6.2 - 18.6 miles) from the site (Q-42). The following analyses were performed:

Gross Beta Weekly samples were analyzed for concentrations of beta emitters (Table C-V.1 and C-V.2, Appendix C).

Comparison of results among the four groups aid in determining the effects, if any, resulting from the operation of QCNPS. The results from the near-field locations (Group I) ranged from 4 to 37E-03 pCi/m3 with a mean of 16E-03 pCi/m3. The results from the far-field locations (Group II) ranged from 5 to 38E-03 pCi/m3 with a mean of 16E-03 pCi/m3. The results from the Control location (Group III) ranged from 8 to 41E-03 pCi/m3 with a mean of 17E-03 pCi/m3. Comparison of the 2020 air particulate data with previous year's data indicate no effects from the operation of QCNPS. In addition comparisons of the weekly mean values for 2020 indicate no notable differences among the three groups. (Figures C-4 through C-9, Appendix C).

Gamma Spectrometry Weekly samples were composited quarterly and analyzed for gamma-emitting nuclides (Table C-V.3, Appendix C). No nuclides associated with QCNPS were detected and all required LLDs were met.

b. Airborne Iodine Continuous air samples were collected from ten locations (Q-01, Q-02, Q-03, Q-04, Q-13, Q-16, Q-37, Q-38, Q-41 and Q-42) and analyzed weekly for I-131 (Table C-VI.1, Appendix C). All results were less than the LLD for I-131.

2. Terrestrial

a. Milk Samples were collected from one location (Q-26) biweekly May through October and monthly November through April. The following analyses were performed:

Iodine-131 Milk samples from the location were analyzed for concentrations of I-131 (Table C-VII.1, Appendix C). No I-131 was detected and the LLD was met.

Gamma Spectrometry Each milk sample was analyzed for concentrations of gamma-emitting nuclides (Table C-VII.2, Appendix C). No nuclides associated with QCNPS were detected and all required LLDs were met.

b. Food Products Food product samples were collected at four locations plus a control location (Q-Control, Q-Quad 1, Q-Quad 2, Q-Quad 3 and Q-Quad 4) annually during growing season. Four locations, (Q-Quad 1, Q-Quad 2, Q-Quad 3 and Q-Quad 4) could be affected by Quad Cities effluent releases. The following analysis was performed:

Gamma Spectrometry Samples from all locations were analyzed for gamma-emitting nuclides (Table C-VIII.1, Appendix C). No nuclides associated with QCNPS were detected and all required LLDs were met.

C.

Ambient Gamma Radiation Ambient gamma radiation levels were measured utilizing optically stimulated luminescence dosimeters. Forty-one OSLD locations were established around the site. Results of OSLD measurements are listed in Tables C-IX.1 and C-IX.2, Appendix C.

All of the OSLD measurements were < 20 mRem/quarter, with a range of 5.2 to 18.5 mRem/quarter. A comparison of the Inner Ring, Outer Ring and Other data to the Control Location data, indicate that the ambient gamma radiation levels from all the locations were comparable.

D.

Independent Spent Fuel Storage Installation QCNPS commenced use of an Independent Spent Fuel Storage Installation (ISFSI) in Dec 2005. There are no measurable changes in ambient gamma radiation levels as a result of ISFSI operations.

E.

Land Use Survey A Land Use Survey conducted during September 2020 around QCNPS was performed by ATI Environmental Inc. (Midwest Labs) for Exelon Nuclear to comply with the Quad Cities Offsite Dose Calculation Manual. The purpose of the survey was to document the nearest resident and milk producing animals in each of the sixteen 22.5 degree sectors around the site. The results from the land use census have not identified any locations, which yield a calculated dose or dose commitment, via the same pathway, that is at least 20% greater than at a location from which samples are currently being obtained. The results of this survey are summarized below:

Distance in Miles from QCNPS Sector Residence Miles Livestock Miles Milk Farm Miles N

0.60 2.7 NNE 1.20 3.1 NE 1.30 3.2 ENE 2.90 2.9 E

2.00 5.5 ESE 2.80 3.1 3.1 SE 1.70 5.3 SSE 1.10 4.5 6.6 S

0.75 4.8 SSW 3.20 3.5 SW 2.90 3.3 WSW 2.20 2.7 W

2.60 4.3 WNW 2.70 3.8 NW 2.60 4.7 NNW 2.10 2.2 Of the above listed Milk Farms, only the farm located at 3.1 miles ESE of QCNPS, listed in the sample results section as Bill Stanley Dairy, has elected to participate in the QCNPS REMP program. Participation by local farmers is voluntary.

F.

Errata Data There is no errata data for 2020.

G.

Summary of Results - Inter-Laboratory Comparison Program Teledyne Brown Engineering Laboratory analyzed Performance Evaluation (PE) samples of air particulate, air iodine, milk, soil, vegetation and water matrices for various analytes (Appendix D). 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 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, 126 out of 133 analyses performed met the specified acceptance criteria. Seven 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 MAPEP February 2020 AP U-233/234 and U-238 results were evaluated as Not Acceptable. The reported value for U-233/234 was 0.0416 +/- 0.0102 Bq/sample and the known result was 0.075 Bq/sample (acceptance range 0.053 - 0.098). The reported value for U-238 was 0.0388 +/- 0.00991 Bq/sample and the known result was 0.078 Bq/sample (acceptance range 0.055 - 0.101). This sample was run as the workgroup duplicate and had RPDs of 10.4% (U-234) and 11.7% (U-238). After the known results were obtained, the sample was relogged. The filter was completely digested with tracer added originally; the R1 results were almost identical. It was concluded that the recorded tracer amount was actually double, causing the results to be skewed. Lab worksheets have been modified to verify actual tracer amount vs. LIMS data. TBE changed vendors for this cross-check to ERA MRAD during the 2nd half of 2020.

Results were acceptable at 97.8% for U-234 and 106% for U-238. (NCR 20-13)

2. The Analytics September 2020 milk Sr-89 result was evaluated as Not Acceptable. The reported value was 62.8 pCi/L and the known result was 95.4 (66%). All QC data was reviewed and there were no anomalies. This was the first failure for milk Sr-89 since 2013 and there have only been 3 upper/lower boundary warnings since that time. It is believed that there may have been some Sr-89 loss during sample prep. The December 2020 result was at 92% of the known. (NCR 20-19)

3. The ERA October 2020 water I-131 result was evaluated as Not Acceptable. The reported value was 22.9 pCi/L and the known result was 28.2 (acceptance range 23.5 - 33.1). The reported result was 81% of the known, which passes TBE QC criteria. This was the first failure for water I-131. (NCR 20-17)

4. The ERA October 2020 water Gross Alpha and Gross Beta results were evaluated as Not Acceptable. The reported/acceptable values and ranges are as follows:

Reported Known Range Gross Alpha 40.0 26.2 13.3 - 34.7 Gross Beta 47.5 69.1 48.0 - 76.0 All QC data was reviewed with no anomalies and a cause for failure could not be determined. This was the first failure for water Gross Beta. A Quick Response follow-up cross-check was analyzed as soon as possible with acceptable results at 96.8% for Gross Alpha and 102% for Gross Beta.

(NCR 20-18)

5. The MAPEP August 2020 soil Ni-63 result was evaluated as Not Acceptable. The reported value was 438 +/- 21.1 Bq/kg and the known result was 980 Bq/kg (acceptance range 686 - 1274). It is believed that some Ni-63 loss occurred during the sample prep step. (NCR 20-20)

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

Intentionally left blank

APPENDIX A RADIOLOGICAL ENVIRONMENTAL MONITORING REPORT

SUMMARY

Intentionally left blank

NAME OF FACILITY:

QUAD CITIES DOCKET NUMBER:

50-254 &50-265 LOCATION OF FACILITY:

CORDOVA, IL REPORTING PERIOD:

2020 INDICATOR CONTROL MEDIUM OR REQUIRED LOCATIONS LOCATION NUMBER OF PATHWAY SAMPLED TYPES OF NUMBER OF LOWER LIMIT MEAN (M)

MEAN (M)

STATION #

NONROUTINE (UNIT OF ANALYSIS ANALYSIS OF DETECTION (F)

(F)

NAME REPORTED MEASUREMENT)

PERFORMED PERFORMED (LLD)

RANGE RANGE RANGE DISTANCE AND DIRECTION MEASUREMENTS SURFACE WATER GR-B 23 4

4.2 5.1 5.1 Q-34 CONTROL 0

(PCI/LITER)

(9/11)

(10/12)

CAMANCHE - UPSTREAM 2.6 - 6.1 2.5 - 10.4 2.5 - 10.4 4.4 MILES NNE OF SITE H-3 8

2000

<LLD

<LLD 0

FE-55 8

200

<LLD

<LLD 0

NI-63 8

5

<LLD

<LLD 0

GAMMA 23 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

CS-137 18

<LLD

<LLD 0

BA-140 60

<LLD

<LLD 0

LA-140 15

<LLD

<LLD 0

GROUND WATER H-3 8

2000

<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

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

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR QUAD CITIES NUCLEAR POWER STATION, 2020 LOCATION WITH HIGHEST ANNUAL MEAN (M)

(M) The Mean Values are calculated using the positive values. (F) Fraction of detectable measurement are indicated in parentheses.

A-1

NAME OF FACILITY:

QUAD CITIES DOCKET NUMBER:

50-254 &50-265 LOCATION OF FACILITY:

CORDOVA, IL REPORTING PERIOD:

2020 INDICATOR CONTROL MEDIUM OR REQUIRED LOCATIONS LOCATION NUMBER OF PATHWAY SAMPLED TYPES OF NUMBER OF LOWER LIMIT MEAN (M)

MEAN (M)

STATION #

NONROUTINE (UNIT OF ANALYSIS ANALYSIS OF DETECTION (F)

(F)

NAME REPORTED MEASUREMENT)

PERFORMED PERFORMED (LLD)

RANGE RANGE RANGE DISTANCE AND DIRECTION MEASUREMENTS TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR QUAD CITIES NUCLEAR POWER STATION, 2020 LOCATION WITH HIGHEST ANNUAL MEAN (M)

FISH GAMMA 8

(PCI/KG WET)

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

NB-95 NA

<LLD

<LLD 0

ZR-95 NA

<LLD

<LLD 0

CS-134 130

<LLD

<LLD 0

CS-137 150

<LLD

<LLD 0

BA-140 NA

<LLD

<LLD 0

LA-140 NA

<LLD

<LLD 0

SEDIMENT GAMMA 4

(PCI/KG DRY)

MN-54 NA

<LLD

<LLD 0

CO-58 NA

<LLD

<LLD 0

FE-59 NA

<LLD

<LLD 0

CO-60 NA

<LLD

<LLD 0

ZN-65 NA

<LLD

<LLD 0

NB-95 NA

<LLD

<LLD 0

ZR-95 NA

<LLD

<LLD 0

CS-134 150

<LLD

<LLD 0

CS-137 180

<LLD

<LLD 0

BA-140 NA

<LLD

<LLD 0

LA-140 NA

<LLD

<LLD 0

AIR PARTICULATE GR-B 520 10 16 17 17 Q-42 CONTROL 0

(E-3 PCI/CU.METER)

(467/468)

(52/52)

LECLAIRE 4 - 38 8 - 41 8 - 41 8.7 MILES SSW OF SITE (M) The Mean Values are calculated using the positive values. (F) Fraction of detectable measurement are indicated in parentheses.

A-2

NAME OF FACILITY:

QUAD CITIES DOCKET NUMBER:

50-254 &50-265 LOCATION OF FACILITY:

CORDOVA, IL REPORTING PERIOD:

2020 INDICATOR CONTROL MEDIUM OR REQUIRED LOCATIONS LOCATION NUMBER OF PATHWAY SAMPLED TYPES OF NUMBER OF LOWER LIMIT MEAN (M)

MEAN (M)

STATION #

NONROUTINE (UNIT OF ANALYSIS ANALYSIS OF DETECTION (F)

(F)

NAME REPORTED MEASUREMENT)

PERFORMED PERFORMED (LLD)

RANGE RANGE RANGE DISTANCE AND DIRECTION MEASUREMENTS TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR QUAD CITIES NUCLEAR POWER STATION, 2020 LOCATION WITH HIGHEST ANNUAL MEAN (M)

AIR PARTICULATE GAMMA 40 (E-3 PCI/CU.METER)

MN-54 NA

<LLD

<LLD 0

CO-58 NA

<LLD

<LLD 0

FE-59 NA

<LLD

<LLD 0

CO-60 NA

<LLD

<LLD 0

ZN-65 NA

<LLD

<LLD 0

NB-95 NA

<LLD

<LLD 0

ZR-95 NA

<LLD

<LLD 0

CS-134 50

<LLD

<LLD 0

CS-137 60

<LLD

<LLD 0

BA-140 NA

<LLD

<LLD 0

LA-140 NA

<LLD

<LLD 0

AIR IODINE GAMMA 520 (E-3 PCI/CU.METER)

I-131 70

<LLD

<LLD 0

MILK I-131 (LOW LVL) 19 1

<LLD NA 0

(PCI/LITER)

GAMMA 19 MN-54 NA

<LLD NA 0

CO-58 NA

<LLD NA 0

FE-59 NA

<LLD NA 0

CO-60 NA

<LLD NA 0

ZN-65 NA

<LLD NA 0

NB-95 NA

<LLD NA 0

ZR-95 NA

<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

(M) The Mean Values are calculated using the positive values. (F) Fraction of detectable measurement are indicated in parentheses.

A-3

NAME OF FACILITY:

QUAD CITIES DOCKET NUMBER:

50-254 &50-265 LOCATION OF FACILITY:

CORDOVA, IL REPORTING PERIOD:

2020 INDICATOR CONTROL MEDIUM OR REQUIRED LOCATIONS LOCATION NUMBER OF PATHWAY SAMPLED TYPES OF NUMBER OF LOWER LIMIT MEAN (M)

MEAN (M)

STATION #

NONROUTINE (UNIT OF ANALYSIS ANALYSIS OF DETECTION (F)

(F)

NAME REPORTED MEASUREMENT)

PERFORMED PERFORMED (LLD)

RANGE RANGE RANGE DISTANCE AND DIRECTION MEASUREMENTS TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR QUAD CITIES NUCLEAR POWER STATION, 2020 LOCATION WITH HIGHEST ANNUAL MEAN (M)

VEGETATION GAMMA 10 (PCI/KG WET)

MN-54 NA

<LLD

<LLD 0

CO-58 NA

<LLD

<LLD 0

FE-59 NA

<LLD

<LLD 0

CO-60 NA

<LLD

<LLD 0

ZN-65 NA

<LLD

<LLD 0

NB-95 NA

<LLD

<LLD 0

ZR-95 NA

<LLD

<LLD 0

I-131 60

<LLD

<LLD 0

CS-134 60

<LLD

<LLD 0

CS-137 80

<LLD

<LLD 0

BA-140 NA

<LLD

<LLD 0

LA-140 NA

<LLD

<LLD 0

DIRECT RADIATION OSLD-QUARTERLY 283 NA 13.1 14.9 17.0 Q-211-2 INDICATOR 0

(MILLI-ROENTGEN/QTR.)

(279/279)

(4/4)

(4/4) 5.2 - 18.5 14.3 - 15.5 16.1 - 18.5 4.5 MILES SW (M) The Mean Values are calculated using the positive values. (F) Fraction of detectable measurement are indicated in parentheses.

A-4

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

Intentionally left blank

TABLE B-1:

Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, Quad Cities Nuclear Power Station, 2020 Location Location Description Distance & Direction From Site A. Surface Water Q-33 Cordova (indicator) 3.1 miles SSW Q-34 Camanche, Upstream (control) 4.4 miles NNE B. Ground/Well Water Q-35 McMillan Well (indicator) 1.5 miles S Q-36 Cordova Well (indicator) 3.3 miles SSW C. Milk - bi-weekly / monthly Q-26 Bill Stanley Dairy (indicator) 3.1 miles ESE D. Air Particulates / Air Iodine Q-01 Onsite 1 (indicator) 0.5 miles N Q-02 Onsite 2 (indicator) 0.4 miles ENE Q-03 Onsite 3 (indicator) 0.6 miles S Q-04 Nitrin (indicator) 1.7 miles NE Q-13 Princeton (indicator) 4.7 miles SW Q-16 Low Moor (indicator) 5.7 miles NNW Q-37 Meredosia Road (indicator) 4.4 miles ENE Q-38 Fuller Road (indicator) 4.7 miles E Q-41 Camanche, Upstream (control) 4.3 miles NNE Q-42 LeClaire (control) 8.7 miles SSW E. Fish Q-24 Pool #14 of Mississippi River, Downstream (indicator) 0.5 miles SW Q-29 Mississippi River, Upstream (control) 1.0 miles N F. Sediment Q-39 Cordova, Downstream on Mississippi River (indicator) 0.8 miles SSW Q-40 North of Albany, Upstream on Mississippi River (control) 8.9 miles NE G. Food Products Quadrant 1 Ken DeBaille 2.3 miles ENE Quadrant 2 Dale Nimmic 3.0 miles ESE Quadrant 3 Amy Johnston 1.8 miles S Quadrant 4 Mike Fawcett 4.5 miles NW Control Charles Leavens 9.5 miles NE H. Environmental Dosimetry - OSLD Inner Ring Q-101-1 / Q-101-1A 0.6 miles N Q-101-2 / Q-101-2A 0.9 miles N Q-102-1 / Q-102-1A 1.3 miles NNE Q-102-3 / Q-102-3A 1.4 miles NNE Q-103-1 / Q-103-1A 1.2 miles NE Q-103-2 / Q-103-2A 1.2 miles NE Q-104-1 / Q-104-1A 1.1 miles ENE Q-104-2 / Q-104-2A 0.9 miles ENE Q-105-1 / Q-105-1A 0.8 miles E Q-105-2 / Q-105-2A 0.8 miles E Q-106-2 / Q-106-2A 0.7 miles ESE Q-106-3 / Q-106-3A 0.7 miles ESE Q-107-2 / Q-107-2A 0.7 miles SE Q-107-3 / Q-107-3A 0.8 miles SE Q-108-1 / Q-108-1A 1.0 miles SSE Q-108-2 / Q-108-2A 0.9 miles SSE Q-109-1 / Q-109-1A 0.9 miles S Q-109-2 / Q-109-2A 1.2 miles S Q-111-1 / Q-111-1A 2.6 miles SW Q-111-2 / Q-111-2A 2.5 miles SW B-1

TABLE B-1:

Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, Quad Cities Nuclear Power Station, 2020

Removed from ODCM in December 2006 and replaced by Q-210-5. Q-210-4 is for trending only Location Location Description Distance & Direction From Site H. Environmental Dosimetry - OSLD (continued)

Inner Ring (continued)

Q-112-1 / Q-112-1A 2.5 miles WSW Q-112-2 / Q-112-2A 2.2 miles WSW Q-113-1 / Q-113-1A 2.5 miles W Q-113-2 / Q-113-2A 2.5 miles W Q-114-1 / Q-114-1A 2.1 miles WNW Q-114-2 / Q-114-2A 2.5 miles WNW Q-115-1 / Q-115-1A 2.6 miles NW Q-115-2 / Q-115-2A 2.3 miles NW Q-116-1 / Q-116-1A 2.3 miles NNW Q-116-3 / Q-116-3A 2.4 miles NNW Outer Ring Q-201-1 / Q-201-1A 4.2 miles N Q-201-2 / Q-201-2A 4.4 miles NNE Q-202-1 / Q-202-1A 4.8 miles NNE Q-203-1 / Q-203-1A 4.7 miles NE Q-203-2 / Q-203-2A 5.0 miles NE Q-204-1 / Q-204-1A 4.7 miles ENE Q-204-2 / Q-204-2A 4.5 miles ENE Q-205-1 / Q-205-1A 4.7 miles E Q-205-4 / Q-205-4A 4.8 miles E Q-206-1 / Q-206-1A 4.8 miles ESE Q-206-2 / Q-206-2A 4.8 miles ESE Q-207-1 / Q-207-1A 4.7 miles SE Q-207-4 / Q-207-4A 4.7 miles SE Q-208-1 / Q-208-1A 4.3 miles SSE Q-208-2 / Q-208-2A 4.9 miles SSE Q-209-1 / Q-209-1A 4.7 miles S Q-209-4 / Q-209-4A 4.7 miles S Q-210-1 / Q-210-1A 4.1 miles SWW Q-210-4* / Q-210-4A*

4.1 miles SSW Q-210-5 / Q-210-5A 3.3 miles SSW Q-211-1 / Q-211-1A 4.5 miles SW Q-211-2 / Q-211-2A 4.5 miles SW Q-212-1 / Q-212-1A 5.4 miles WSW Q-212-2 / Q-212-2A 4.4 miles WSW Q-213-1 / Q-213-1A 4.3 miles W Q-213-2 / Q-213-2A 4.8 miles W Q-214-1 / Q-214-1A 4.7 miles WNW Q-214-2 / Q-214-2A 4.4 miles WNW Q-215-1 / Q-215-1A 5.0 miles NW Q-215-2 / Q-215-2A 4.2 miles NW Q-216-1 / Q-216-1A 4.6 miles NNW Q-216-2 / Q-216-2A 4.3 miles NNW Other Q-01-1 / Q-01-2 Onsite 1 (indicator) 0.5 miles N Q-02-1 / Q-02-2 Onsite 2 (indicator) 0.4 miles ENE Q-03-1 / Q-03-2 Onsite 3 (indicator) 0.6 miles S Q-04-1 / Q-04-2 Nitrin (indicator) 1.7 miles NE Q-13-1 / Q-13-2 Princeton (indicator) 4.7 miles SW Q-16-1 / Q-16-2 Low Moor (indicator) 5.7 miles NNW Q-37-1 / Q-37-2 Meredosia (indicator) 4.4 miles ENE Q-38-1 / Q-38-2 Fuller Road (indicator) 4.7 miles E Q-41-1 / Q-41-2 Camanche (indicator) 4.3 miles NNE Control Q-42-1 / Q-42-2 LeClaire 8.7 miles SSW B-2

TABLE B-2:

Radiological Environmental Monitoring Program - Summary of Sample Collection and Analytical Methods, Quad Cities Nuclear Power Station, 2020 Sample Medium Analysis Sampling Method Analytical Procedure Number Surface Water Gamma Spectroscopy Monthly composite from weekly grab samples TBE, TBE-2007 Gamma emitting radioisotope analysis Surface Water Gross Beta Monthly composite from weekly grab samples TBE, TBE-2008 Gross Alpha and/or gross beta activity in various matrices Surface Water Tritium Quarterly composite from weekly grab samples TBE, TBE-2011 Tritium analysis in drinking water by liquid scintillation Surface Water Iron and Nickel Quarterly composite from weekly grab samples TBE, TBE-2006 Iron-55 in various matrices TBE, TBE-2013 Radionickel in various matrices Ground Water Gamma Spectroscopy Quarterly grab samples TBE, TBE-2007 Gamma emitting radioisotope analysis Ground Water Tritium Quarterly grab samples TBE, TBE-2011 Tritium analysis in drinking water by liquid scintillation Fish Gamma Spectroscopy Semi-annual samples collected via electroshocking or other techniques TBE-2007 Gamma emitting radioisotope analysis Sediment Gamma Spectroscopy Semi-annual grab samples TBE, TBE-2007 Gamma emitting radioisotope analysis Air Particulates Gross Beta One-week composite of continuous air sampling through glass fiber filter paper TBE, TBE-2008 Gross Alpha and/or gross beta activity in various matrices Air Particulates Gamma Spectroscopy Quarterly composite of each station TBE, TBE-2007 Gamma emitting radioisotope analysis Air Iodine Gamma Spectroscopy Weekly composite of continuous air sampling through charcoal filter TBE, TBE-2007 Gamma emitting radioisotope analysis Milk I-131 Bi-weekly grab sample when cows are on pasture.

Monthly all other times TBE, TBE-2012 Radioiodine in various matrices Milk Gamma Spectroscopy Bi-weekly grab sample when cows are on pasture.

Monthly all other times TBE, TBE-2007 Gamma emitting radioisotope analysis Food Products Gamma Spectroscopy Annual grab samples TBE, TBE-2007 Gamma emitting radioisotope analysis OSLD Optically Stimulated Luminescence Dosimetry Quarterly OSLDs comprised of two Al2O3:C Landauer Incorporated elements Landauer Incorporated B-3

2 mi North NE ENE East South SSE SE ESE WNW West SW SSW NW NNW WSW NNE Figure B-1 Map Quad Cities REMP Sampling Locations Mile Radius, 2020 B-4 All dosimeter locations contain two dosimeters, ex. numbering convention 102-1/102-1A

/

e Dosimeters SECTOR 101-1,2 North 102-1,3 NNE 103-1,2 NE 104-1,2 ENE 105-1,2 East 106-2,3 ESE 107-2,3 SE 108-1,2 SSE 109-1,2 South AAIR SAMPLERS/Dosimeters 01

...f!filL 24 29 02 03 04

~

SECTOR SW..... =

SSW PRIMARY ROADS SECONDARY ROADS RIVERS/STR£AMS

... RAILROADS

-FENCE A METEOROLOGICAL TOWER e Doeiml'WQ A NA !W.IPI..ERS/Ooeiml'WQ WATER SAMPLES ill!Q!.

North ENE So,th NE

~,.

g£!!i!!.

I I

1/4 1/2 Mlle ffi

East 9.3 mi 5 mi 2mi NNW North NNE NE ENE ESE SE SSE South SSW SW WSW West WNW NW 0

90 270 o

o o

10 1.2 5 o

o o

o 12 3.7 5 14 6.2 5 16 8.7 5 18 0 o

o o

19 1.25 2 13.75 25 8.75 28 1.25 3 0 3.75 3 26.25 3 4 8.75 78.75 5 6.25 11.25 33.75 o

o o

23 6.2 5 o

Figure B-2 Map Quad Cities REMP Sampling Locations - 9.3-Mile Radius, 2020 B-5 All dosimeter locations contain two dosimeters, ex. numbering convention 102-1/102-1A

Dosimeters SECTOR

AIR SAMPLERS,!Oosimetera SECTOR 101-1,2 North 01 North 102-1,3 NNE 02 ENE 103-1.2 NE 03 South 104-1,2 ENE 04 NE 105-1,2 Eost 13 SW 106-2,3 ESE 16 NNW 107-2,3 SE 37 ENE 108-1,2 SSE 38 Eost 109-1,2 South 41 NNE 111-1,2 SW 42 SSW 112-1,2 WSW 113-1,2 Wut 114-1,2 WNW 115-1,2 NW WATER SAMPLES ~

116-1,3 NNW PRIMARY ROADS 33 SSW 201-1,2 North SECONOARY ROADS 202-1,2 NNE 34 NNE RIVERS/STREAMS 35 Sooth 203-1,2 NE 36 SSW 204-1,2 ENE M RAILROAOS 205-1,4 Eost

-FENCE X

MILK SECTOR 206-1,2 ESE A METEOROLOGICAL TOWER 207-1,4 SE 26 ESE SSE e Dollmet.-.

208-1,2 209-1,4 South

£. AIR SAMPLERS/Doaimet.-.

WATER SAMPLES 210-1,5 SSW

.....E!filL SECTOR 211-1,2 SW X

MILK 24 SW 212-1,2 WSW * ""'

29 North 213-1.2 We,t SEDIMENT 214-1,2 WNW 215-1,2 NW 216-1,2 NNW SEDIMENT SECTOR 39 40 NE

-=-

0 1/4 1/2 Mile

~

DRAWING RELEASE RECORD REV1 CIA.TE I OESCRIPTION IHPSD APPROVAi..

0 4 17 M ORIGINAL FRED OST WIILJAM CARL 1 I 1-99 I 1999 REVS 2 I 2-99 I 1999 REVS l~PRO _APP~

3 !3-22-041 2004 REVS 4 I 11-08 I 2008 REVS 5 112-7-10 I 2010 REVS 6 112-10-1~ 2012 REVS QUAD CITIES STATION FIGURE 6-2 REMP Sample Lacatians EXELON GENERATION CHICAGO IWNOIS CRAWN BY: KATHLEEN E. WILLIAMS

Intentionally left blank

APPENDIX C DATA TABLES AND FIGURES

Intentionally left blank

Table C-I.1 COLLECTION PERIOD Q-33 Q-34 01/02/20 - 01/02/20 4.8 +/- 2.1 10.4 +/- 2.6 02/27/20 - 02/27/20 (1) 4.5 +/- 2.0 03/05/20 - 03/26/20 3.8 +/- 1.9 6.2 +/- 2.1 04/02/20 - 04/30/20 5.5 +/- 1.7 5.3 +/- 1.7 05/07/20 - 05/28/20 6.1 +/- 1.9 4.6 +/- 1.8 06/04/20 - 06/25/20 2.8 +/- 1.5 4.2 +/- 1.7 07/02/20 - 07/30/20 2.6 +/- 1.8

< 2.6 08/06/20 - 08/27/20

< 2.3 3.2 +/- 1.7 09/03/20 - 09/25/20 4.6 +/- 2.0

< 2.5 10/02/20 - 10/31/20 3.1 +/- 1.8 6.1 +/- 2.0 11/07/20 - 11/27/20 4.3 +/- 1.6 4.4 +/- 1.6 12/04/20 - 12/18/20

< 2.5 2.5 +/- 1.7 MEAN +/- 2 STD DEV 4.2 +/- 2.4 5.1 +/- 4.4 Table C-I.2 COLLECTION SITE PERIOD H-3 FE-55 NI-63 Q-33 01/02/20 - 03/26/20

< 159

< 53

< 4.9 04/02/20 - 06/25/20

< 190

< 87

< 4.3 07/02/20 - 09/25/20

< 194

< 91

< 5.0 10/02/20 - 12/18/20

< 180

< 90

< 4.6 MEAN Q-34 01/02/20 - 03/26/20

< 155

< 77

< 5.0 04/02/20

- 06/25/20

< 190

< 69

< 3.9 07/02/20

- 09/25/20

< 196

< 109

< 4.6 10/02/20 -

12/18/20

< 183

< 135

< 4.7 MEAN (1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION CONCENTRATIONS OF GROSS BETA IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF QUAD CITIES NUCLEAR POWER STATION, 2020 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA CONCENTRATIONS OF TRITIUM, IRON, AND NICKEL SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF QUAD CITIES NUCLEAR POWER STATION, 2020 C-1

Table C-I.3 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 Q-33 01/02/20 - 01/02/20

< 2

< 6

< 2

< 4

< 3

< 4

< 10

< 2

< 39

< 14 02/27/20 - 02/27/20 (1) 03/05/20 - 03/26/20

< 6

< 7

< 15

< 8

< 18

< 5

< 12

< 9

< 8

< 36

< 11 04/02/20 - 04/30/20

< 2

< 3

< 9

< 2

< 4

< 3

< 6

< 622

< 2

< 240

< 79 05/07/20 - 05/28/20

< 5

< 11

< 5

< 10

< 6

< 10

< 14

< 5

< 35

< 11 06/04/20 - 06/25/20

< 6

< 12

< 6

< 11

< 6

< 10

< 15

< 6

< 5

< 36

< 9 07/02/20 - 07/30/20

< 6

< 5

< 11

< 6

< 12

< 6

< 7

< 10

< 7

< 6

< 28

< 8 08/06/20 - 08/27/20

< 3

< 6

< 3

< 6

< 3

< 5

< 8

< 3

< 19

< 7 09/03/20 - 09/25/20

< 5

< 6

< 19

< 9

< 20

< 8

< 12

< 11

< 9

< 7

< 33

< 9 10/02/20 - 10/31/20

< 6

< 13

< 7

< 11

< 7

< 12

< 10

< 6

< 7

< 25

< 10 11/07/20 - 11/27/20

< 7

< 4

< 9

< 5

< 11

< 6

< 9

< 14

< 7

< 6

< 35

< 11 12/04/20 - 12/18/20

< 2

< 5

< 2

< 4

< 2

< 4

< 11

< 2

< 19

< 6 MEAN Q-34 01/02/20 - 01/02/20

< 2

< 3

< 7

< 2

< 5

< 3

< 5

< 13

< 3

< 2

< 49

< 16 02/27/20 - 02/27/20

< 8

< 7

< 16

< 7

< 17

< 8

< 13

< 8

< 36

< 12 03/05/20 - 03/26/20

< 5

< 6

< 12

< 7

< 12

< 6

< 10

< 9

< 8

< 6

< 27

< 9 04/02/20 - 04/30/20

< 2

< 3

< 11

< 2

< 4

< 6

< 1201

< 2

< 326

< 113 05/07/20 - 05/28/20

< 7

< 5

< 11

< 7

< 15

< 7

< 9

< 14

< 6

< 7

< 36

< 14 06/04/20 - 06/25/20

< 4

< 8

< 4

< 7

< 4

< 7

< 11

< 4

< 26

< 10 07/02/20 - 07/30/20

< 5

< 6

< 10

< 6

< 11

< 5

< 9

< 6

< 5

< 24

< 7 08/06/20 - 08/27/20

< 3

< 4

< 7

< 3

< 6

< 3

< 6

< 9

< 3

< 23

< 7 09/03/20 - 09/25/20

< 7

< 6

< 14

< 6

< 14

< 9

< 10

< 9

< 7

< 9

< 33

< 6 10/02/20 - 10/31/20

< 4

< 5

< 13

< 6

< 12

< 6

< 8

< 9

< 6

< 25

< 6 11/07/20 - 11/27/20

< 5

< 7

< 12

< 6

< 13

< 6

< 10

< 14

< 6

< 36

< 11 12/04/20 - 12/18/20

< 2

< 4

< 2

< 4

< 2

< 4

< 9

< 2

< 18

< 5 MEAN (1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION BOLD = Lab unable to meet client-required detection limit due to sample age at analysis CONCENTRATIONS OF GAMMA EMITTERS IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF QUAD CITIES NUCLEAR POWER STATION, 2020 RESULTS IN UNITS OF PCI/LITER + 2 SIGMA I-131 C-2

Table C-II.1 CONCENTRATIONS OF TRITIUM IN GROUND WATER SAMPLES COLLECTED COLLECTION PERIOD Q-35 Q-36 01/09/20 - 01/09/20

< 191

< 193 04/09/20 - 04/09/20

< 175

< 176 07/16/20 - 07/16/20

< 180

< 179 10/09/20 - 10/09/20

< 190

< 194 MEAN IN THE VICINITY OF QUAD CITIES NUCLEAR POWER STATION, 2020 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA C-3

Table C-II.2 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 Q-35 01/09/20 - 01/09/20

< 6

< 10

< 8

< 16

< 7

< 11

< 10

< 6

< 7

< 34

< 10 04/09/20 - 04/09/20

< 6

< 9

< 8

< 12

< 7

< 10

< 11

< 6

< 30

< 8 07/16/20 - 07/16/20

< 6

< 7

< 10

< 7

< 17

< 7

< 13

< 9

< 4

< 6

< 34

< 12 10/09/20 - 10/09/20

< 8

< 7

< 12

< 8

< 15

< 7

< 13

< 12

< 9

< 8

< 39

< 9 MEAN Q-36 01/09/20 - 01/09/20

< 6

< 13

< 7

< 15

< 6

< 9

< 11

< 7

< 6

< 34

< 8 04/09/20 - 04/09/20

< 5

< 12

< 7

< 12

< 7

< 9

< 10

< 6

< 28

< 9 07/16/20 - 07/16/20

< 5

< 7

< 13

< 7

< 12

< 7

< 11

< 8

< 7

< 30

< 6 10/09/20 - 10/09/20

< 7

< 15

< 10

< 16

< 8

< 13

< 12

< 9

< 35

< 10 MEAN CONCENTRATIONS OF GAMMA EMITTERS IN GROUND WATER SAMPLES COLLECTED IN THE VICINITY OF QUAD CITIES NUCLEAR POWER STATION, 2020 RESULTS IN UNITS OF PCI/LITER + 2 SIGMA C-4

Table C-III.1 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 Q-24 Channel Catfish 05/21/20

< 52

< 65

< 116

< 58

< 115

< 49

< 101

< 41

< 48

< 281

< 74 Freshwater Drum 05/21/20

< 71

< 61

< 116

< 53

< 130

< 78

< 111

< 72

< 78

< 397

< 78 Common Carp 10/21/20

< 45

< 40

< 122

< 56

< 111

< 45

< 98

< 51

< 48

< 244

< 76 Largemouth Bass 10/21/20

< 42

< 55

< 108

< 64

< 123

< 52

< 112

< 52

< 41

< 211

< 59 MEAN Q-29 Channel Catfish 05/21/20

< 87

< 93

< 202

< 86

< 179

< 94

< 164

< 94

< 83

< 503

< 109 Common Carp 05/21/20

< 51

< 100

< 53

< 100

< 51

< 81

< 59

< 50

< 347

< 149 Channel Catfish 10/21/20

< 44

< 47

< 89

< 45

< 94

< 44

< 84

< 46

< 188

< 64 Common Carp 10/21/20

< 54

< 61

< 111

< 74

< 137

< 55

< 114

< 66

< 56

< 311

< 85 MEAN CONCENTRATIONS OF GAMMA EMITTERS IN FISH SAMPLES COLLECTED IN THE VICINITY OF QUAD CITIES NUCLEAR POWER STATION, 2020 RESULTS IN UNITS OF PC/KG WET + 2 SIGMA C-5

Table C-IV.1 COLLECTED IN THE VICINITY OF QUAD CITIES NUCLEAR POWER STATION, 2020 COLLECTION SITE PERIOD Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Ba-140 La-140 Q-39 05/19/20

< 79

< 74

< 133

< 63

< 152

< 76

< 120

< 86

< 103

< 308 90 10/17/20

< 68

< 141

< 63

< 136

< 67

< 107

< 77

< 74

< 283 57 MEAN Q-40 05/19/20

< 80

< 46

< 151

< 64

< 145

< 79

< 144

< 103

< 96

< 294

< 75 10/17/20

< 70

< 57

< 119

< 69

< 148

< 66

< 116

< 80

< 81

< 264

< 73 MEAN RESULTS IN UNITS OF PC/KG DRY +/- 2 SIGMA CONCENTRATIONS OF GAMMA EMITTERS IN SEDIMENT SAMPLES Cs-137 C-6

Table C-V.1 COLLECTION GROUP I GROUP II GROUP III PERIOD Q-01 Q-02 Q-03 Q-04 Q-13 Q-16 Q-37 Q-38 Q-41 Q-42 01/02/20 - 01/10/20 10 +/- 3 11 +/- 3 7 +/- 3 7 +/- 3 11 +/- 3 11 +/- 3 10 +/- 3 6 +/- 3 12 +/- 3 15 +/- 4 01/09/20 - 01/17/20 24 +/- 4 25 +/- 5 25 +/- 5 29 +/- 5 22 +/- 4 23 +/- 4 19 +/- 4 23 +/- 4 28 +/- 5 27 +/- 5 01/16/20 - 01/24/20 25 +/- 5 24 +/- 5 24 +/- 5 21 +/- 4 27 +/- 5 24 +/- 5 22 +/- 5 23 +/- 5 29 +/- 5 22 +/- 5 01/23/20 - 01/31/20 10 +/- 4 11 +/- 4 11 +/- 4 11 +/- 4 9 +/- 4 11 +/- 4 9 +/- 4 9 +/- 4 11 +/- 4 12 +/- 4 01/30/20 - 02/07/20 10 +/- 3 11 +/- 3 10 +/- 3 13 +/- 4 10 +/- 3 15 +/- 4 12 +/- 4 11 +/- 3 14 +/- 4 13 +/- 3 02/06/20 - 02/14/20 19 +/- 4 16 +/- 4 16 +/- 4 15 +/- 4 13 +/- 4 13 +/- 4 14 +/- 4 16 +/- 4 17 +/- 4 15 +/- 4 02/14/20 - 02/20/20 20 +/- 5 19 +/- 5 17 +/- 4 15 +/- 4 9 +/- 4 13 +/- 5 14 +/- 4 16 +/- 4 13 +/- 5 10 +/- 4 02/20/20 - 02/28/20 15 +/- 4 20 +/- 4 20 +/- 4 18 +/- 4 20 +/- 4 19 +/- 4 19 +/- 4 18 +/- 4 21 +/- 5 19 +/- 4 02/27/20 - 03/06/20 11 +/- 4 13 +/- 4 11 +/- 4 9 +/- 3 11 +/- 4 15 +/- 4 13 +/- 4 10 +/- 4 15 +/- 4 11 +/- 4 03/05/20 - 03/13/20 9 +/- 3 12 +/- 4 13 +/- 4 12 +/- 4 14 +/- 4 17 +/- 4 10 +/- 4 10 +/- 4 21 +/- 4 16 +/- 4 03/12/20 - 03/20/20 19 +/- 4 20 +/- 4 12 +/- 4 17 +/- 4 13 +/- 4 12 +/- 4 19 +/- 4 15 +/- 4 16 +/- 4 15 +/- 4 03/20/20 - 03/26/20 13 +/- 4 18 +/- 4 15 +/- 4 11 +/- 4 18 +/- 5 13 +/- 4 8 +/- 4 14 +/- 4 13 +/- 4 14 +/- 5 03/26/20 - 04/03/20 6 +/- 4 10 +/- 4 7 +/- 4 9 +/- 4 12 +/- 4

< 5 12 +/- 4 7 +/- 4 6 +/- 4 10 +/- 4 04/02/20 - 04/10/20 13 +/- 4 12 +/- 3 14 +/- 4 13 +/- 4 15 +/- 4 9 +/- 3 12 +/- 3 10 +/- 3 13 +/- 4 13 +/- 4 04/09/20 - 04/17/20 12 +/- 3 17 +/- 4 15 +/- 4 13 +/- 3 15 +/- 4 13 +/- 3 8 +/- 3 7 +/- 3 14 +/- 4 15 +/- 4 04/16/20 - 04/24/20 10 +/- 3 11 +/- 4 11 +/- 4 12 +/- 4 10 +/- 3 10 +/- 3 12 +/- 4 12 +/- 4 14 +/- 4 16 +/- 4 04/23/20 - 05/01/20 15 +/- 4 17 +/- 4 17 +/- 4 13 +/- 4 13 +/- 4 16 +/- 4 16 +/- 4 13 +/- 4 17 +/- 4 17 +/- 4 04/30/20 - 05/08/20 7 +/- 3 10 +/- 4 9 +/- 4 10 +/- 4 12 +/- 4 9 +/- 3 8 +/- 3 8 +/- 3 7 +/- 3 12 +/- 4 05/07/20 - 05/15/20 11 +/- 4 11 +/- 4 10 +/- 4 8 +/- 3 11 +/- 4 9 +/- 3 9 +/- 3 11 +/- 4 10 +/- 4 9 +/- 3 05/14/20 - 05/22/20 7 +/- 4 10 +/- 4 9 +/- 4 7 +/- 4 10 +/- 4 9 +/- 4 8 +/- 4 11 +/- 4 8 +/- 4 12 +/- 4 05/21/20 - 05/29/20 13 +/- 4 13 +/- 4 9 +/- 4 15 +/- 4 10 +/- 4 10 +/- 4 8 +/- 3 8 +/- 3 8 +/- 3 11 +/- 4 05/28/20 - 06/05/20 9 +/- 4 10 +/- 4 11 +/- 4 10 +/- 4 11 +/- 4 10 +/- 4 10 +/- 4 12 +/- 4 6 +/- 4 11 +/- 4 06/04/20 - 06/12/20 12 +/- 3 9 +/- 3 13 +/- 3 13 +/- 3 12 +/- 3 13 +/- 3 11 +/- 3 13 +/- 3 14 +/- 4 15 +/- 4 06/11/20 - 06/19/20 19 +/- 4 15 +/- 4 19 +/- 4 12 +/- 3 5 +/- 3 14 +/- 4 16 +/- 4 15 +/- 4 15 +/- 4 15 +/- 4 06/18/20 - 06/26/20 13 +/- 4 12 +/- 4 11 +/- 4 14 +/- 4 13 +/- 4 15 +/- 4 17 +/- 4 13 +/- 4 12 +/- 4 16 +/- 4 06/25/20 - 07/03/20 15 +/- 4 12 +/- 4 18 +/- 4 15 +/- 4 9 +/- 3 17 +/- 4 13 +/- 4 14 +/- 4 16 +/- 4 15 +/- 4 07/02/20 - 07/10/20 19 +/- 4 18 +/- 4 19 +/- 4 20 +/- 4 20 +/- 4 20 +/- 4 22 +/- 4 19 +/- 4 20 +/- 4 16 +/- 4 07/09/20 - 07/17/20 15 +/- 4 14 +/- 4 17 +/- 4 13 +/- 4 13 +/- 4 14 +/- 4 10 +/- 4 10 +/- 4 11 +/- 4 14 +/- 4 07/16/20 - 07/24/20 16 +/- 4 19 +/- 4 16 +/- 4 13 +/- 4 16 +/- 4 17 +/- 4 13 +/- 4 14 +/- 4 15 +/- 4 16 +/- 4 07/23/20 - 07/31/20 13 +/- 4 14 +/- 4 8 +/- 4 12 +/- 4 14 +/- 4 12 +/- 4 12 +/- 4 14 +/- 4 13 +/- 4 11 +/- 4 07/30/20 - 08/07/20 8 +/- 3 13 +/- 4 14 +/- 4 11 +/- 4 15 +/- 4 12 +/- 4 15 +/- 4 14 +/- 4 13 +/- 4 11 +/- 4 08/06/20 - 08/14/20 23 +/- 4 10 +/- 3 18 +/- 4 21 +/- 4 14 +/- 4 26 +/- 6 19 +/- 5 23 +/- 5 17 +/- 4 19 +/- 4 08/13/20 - 08/21/20 17 +/- 4 17 +/- 4 18 +/- 4 16 +/- 4 21 +/- 4 19 +/- 4 13 +/- 4 19 +/- 4 21 +/- 4 25 +/- 5 08/20/20 - 08/28/20 34 +/- 5 37 +/- 6 32 +/- 5 25 +/- 5 35 +/- 5 28 +/- 5 30 +/- 5 30 +/- 5 31 +/- 5 35 +/- 5 08/27/20 - 09/04/20 17 +/- 4 24 +/- 5 19 +/- 4 18 +/- 4 20 +/- 4 18 +/- 4 22 +/- 4 18 +/- 4 18 +/- 4 19 +/- 4 09/03/20 - 09/11/20 10 +/- 3 7 +/- 3 9 +/- 3 8 +/- 3 8 +/- 3 9 +/- 3 7 +/- 3 7 +/- 3 10 +/- 3 8 +/- 3 09/10/20 - 09/18/20 26 +/- 5 19 +/- 4 24 +/- 5 22 +/- 4 13 +/- 3 23 +/- 4 24 +/- 5 20 +/- 4 25 +/- 4 15 +/- 4 09/18/20 - 09/25/20 23 +/- 5 24 +/- 5 20 +/- 5 20 +/- 5 22 +/- 5 25 +/- 5 23 +/- 5 15 +/- 4 12 +/- 4 12 +/- 4 09/25/20 - 10/02/20 13 +/- 4 13 +/- 4 13 +/- 4 9 +/- 4 11 +/- 4 12 +/- 4 12 +/- 4 11 +/- 4 9 +/- 3 17 +/- 4 10/02/20 - 10/09/20 20 +/- 4 9 +/- 3 19 +/- 4 19 +/- 4 20 +/- 4 21 +/- 4 19 +/- 4 21 +/- 4 17 +/- 4 23 +/- 4 10/09/20 - 10/17/20 20 +/- 4 18 +/- 4 19 +/- 4 17 +/- 4 20 +/- 4 20 +/- 4 19 +/- 4 21 +/- 4 16 +/- 4 19 +/- 4 10/17/20 - 10/24/20 14 +/- 4 14 +/- 4 16 +/- 4 11 +/- 4 20 +/- 5 13 +/- 4 13 +/- 4 13 +/- 4 12 +/- 4 16 +/- 4 10/24/20 - 10/31/20 15 +/- 4 18 +/- 4 13 +/- 4 16 +/- 4 17 +/- 4 16 +/- 4 16 +/- 4 16 +/- 4 16 +/- 4 11 +/- 4 10/31/20 - 11/07/20 24 +/- 4 22 +/- 4 24 +/- 5 18 +/- 4 22 +/- 4 19 +/- 4 24 +/- 4 18 +/- 4 20 +/- 4 20 +/- 4 11/07/20 - 11/14/20 4 +/- 3 11 +/- 4 13 +/- 4 11 +/- 3 15 +/- 4 11 +/- 3 12 +/- 4 11 +/- 4 11 +/- 3 13 +/- 4 11/14/20 - 11/20/20 13 +/- 4 6 +/- 3 9 +/- 3 11 +/- 3 14 +/- 4 11 +/- 4 12 +/- 3 9 +/- 3 18 +/- 4 14 +/- 4 11/20/20 - 11/27/20 23 +/- 5 26 +/- 6 25 +/- 6 26 +/- 6 26 +/- 5 28 +/- 5 20 +/- 5 24 +/- 6 22 +/- 5 27 +/- 5 11/27/20 - 12/04/20 20 +/- 5 8 +/- 4 16 +/- 5 18 +/- 5 20 +/- 5 19 +/- 4 13 +/- 4 17 +/- 5 15 +/- 4 24 +/- 5 12/04/20 - 12/11/20 30 +/- 4 20 +/- 4 31 +/- 5 36 +/- 5 36 +/- 5 38 +/- 5 29 +/- 4 31 +/- 5 32 +/- 5 41 +/- 5 12/11/20 - 12/18/20 16 +/- 4 19 +/- 5 22 +/- 5 18 +/- 5 15 +/- 4 14 +/- 4 17 +/- 4 19 +/- 5 16 +/- 4 17 +/- 4 12/18/20 - 12/26/20 31 +/- 5 29 +/- 5 27 +/- 4 30 +/- 5 24 +/- 4 25 +/- 4 27 +/- 4 27 +/- 4 26 +/- 4 24 +/- 4 12/26/20 - 12/31/20 21 +/- 5 27 +/- 6 17 +/- 5 22 +/- 6 23 +/- 6 18 +/- 5 23 +/- 6 20 +/- 6 22 +/- 6 24 +/- 6 MEAN +/- 2 STD DEV 16 +/- 13 16 +/- 13 16 +/- 12 15 +/- 12 16 +/- 13 16 +/- 12 15 +/- 12 15 +/- 12 16 +/- 12 17 +/- 13 THE MEAN AND TWO STANDARD DEVIATION ARE CALCULATED USING THE POSITIVE VALUES CONCENTRATIONS OF GROSS BETA IN AIR PARTICULATE SAMPLES RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA COLLECTED IN THE VICINITY OF QUAD CITIES NUCLEAR POWER STATION, 2020 C-7

Table C-V.2 MONTHLY AND YEARLY MEAN VALUES OF GROSS BETA CONCENTRATIONS IN AIR PARTICULATE GROUP I - NEAR-SITE LOCATIONS GROUP II - FAR-FIELD LOCATIONS GROUP III - CONTROL LOCATION COLLECTION MIN MAX MEAN COLLECTION MIN MAX MEAN COLLECTION MIN MAX MEAN PERIOD

+/- 2SD PERIOD

+/- 2SD 01/03/20 - 01/31/20 7

29 17 +/- 16 01/03/20 - 01/31/20 6

29 18 +/- 16 01/09/20 - 01/30/20 12 27 20 +/- 16 01/31/20 - 02/28/20 10 20 16 +/- 7 01/30/20 - 02/28/20 9

21 15 +/- 7 01/30/20 - 02/27/20 10 19 14 +/- 8 02/28/20 - 04/03/20 6

20 12 +/- 8 02/27/20 - 04/03/20 6

21 13 +/- 7 02/27/20 - 04/02/20 10 16 13 +/- 5 04/03/20 - 05/01/20 10 17 13 +/- 4 04/02/20 - 05/01/20 7

17 12 +/- 5 04/02/20 - 04/30/20 13 17 15 +/- 4 05/01/20 - 05/29/20 7

15 10 +/- 5 04/30/20 - 05/29/20 7

12 9 +/- 3 04/30/20 - 05/28/20 9

12 11 +/- 2 05/29/20 - 07/03/20 9

19 13 +/- 6 05/28/20 - 07/03/20 5

17 13 +/- 6 05/28/20 - 07/02/20 11 16 14 +/- 4 07/03/20 - 07/31/20 8

20 15 +/- 6 07/02/20 - 07/31/20 10 22 15 +/- 7 07/02/20 - 07/30/20 11 16 14 +/- 4 07/31/20 - 09/04/20 8

37 20 +/- 16 07/30/20 - 09/04/20 12 35 20 +/- 13 07/30/20 - 09/03/20 11 35 22 +/- 17 09/04/20 - 10/02/20 7

26 16 +/- 13 09/03/20 - 10/02/20 7

25 15 +/- 13 09/03/20 - 10/02/20 8

17 13 +/- 8 10/02/20 - 10/31/20 9

20 16 +/- 7 10/02/20 - 10/31/20 12 21 17 +/- 6 10/02/20 - 10/31/20 11 23 17 +/- 10 10/31/20 - 12/04/20 4

26 16 +/- 14 10/31/20 - 12/04/20 9

28 17 +/- 11 10/31/20 - 12/04/20 13 27 19 +/- 12 12/04/20 - 12/31/20 16 36 25 +/- 12 12/04/20 - 12/31/20 11 12 24 +/- 14 12/04/20 - 12/31/20 15 15 26 +/- 20 01/03/20 - 12/31/20 4

37 16 +/- 12 01/02/20 - 12/31/20 5

38 16 +/- 12 01/02/20 - 12/31/20 8

41 17 +/- 13 SAMPLES COLLECTED IN THE VICINITY OF QUAD CITIES NUCLEAR POWER STATION, 2020 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA C-8

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 Q-01 01/03/20 - 04/03/20

< 3

< 2

< 5

< 2

< 5

< 3

< 4

< 2

< 14

< 7 04/03/20 - 07/03/20

< 2

< 6

< 3

< 5

< 2

< 4

< 3

< 2

< 16

< 3 07/03/20 - 10/02/20

< 4

< 8

< 2

< 9

< 4

< 7

< 4

< 26

< 14 10/02/20 - 12/31/20

< 2

< 5

< 3

< 5

< 2

< 4

< 2

< 11

< 2 MEAN Q-02 01/03/20 - 04/03/20

< 2

< 4

< 3

< 6

< 2

< 3

< 2

< 10

< 5 04/03/20 - 07/03/20

< 2

< 4

< 3

< 2

< 4

< 2

< 9

< 5 07/03/20 - 10/02/20

< 2

< 3

< 2

< 8

< 2

< 4

< 3

< 2

< 20

< 11 10/02/20 - 12/31/20

< 2

< 4

< 1

< 5

< 2

< 4

< 2

< 11

< 3 MEAN Q-03 01/03/20 - 04/03/20

< 3

< 2

< 5

< 3

< 7

< 3

< 4

< 3

< 2

< 16

< 6 04/03/20 - 07/03/20

< 2

< 3

< 4

< 2

< 3

< 2

< 7

< 5 07/03/20 - 10/02/20

< 2

< 6

< 2

< 5

< 3

< 5

< 2

< 19

< 3 10/02/20 - 12/31/20

< 2

< 4

< 3

< 4

< 3

< 4

< 2

< 11

< 2 MEAN Q-04 01/03/20 - 04/03/20

< 3

< 8

< 5

< 6

< 3

< 6

< 3

< 18

< 7 04/03/20 - 07/03/20

< 2

< 5

< 3

< 6

< 2

< 5

< 3

< 2

< 12

< 3 07/03/20 - 10/02/20

< 1

< 4

< 2

< 4

< 1

< 2

< 14

< 2 10/02/20 - 12/31/20

< 2

< 3

< 6

< 2

< 6

< 3

< 4

< 3

< 2

< 12

< 6 MEAN Q-13 01/02/20 - 04/02/20

< 2

< 3

< 5

< 3

< 9

< 3

< 5

< 3

< 15

< 6 04/02/20 - 07/02/20

< 2

< 4

< 2

< 3

< 2

< 3

< 2

< 9

< 4 07/02/20 - 10/02/20

< 2

< 4

< 2

< 5

< 2

< 4

< 2

< 17

< 6 10/02/20 - 12/31/20

< 2

< 4

< 3

< 5

< 2

< 3

< 2

< 6

< 2 MEAN Table C-V.3 CONCENTRATIONS OF GAMMA EMITTERS IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF QUAD CITIES NUCLEAR POWER STATION, 2020 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA C-9

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 Table C-V.3 CONCENTRATIONS OF GAMMA EMITTERS IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF QUAD CITIES NUCLEAR POWER STATION, 2020 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA Q-16 01/02/20 - 04/02/20

< 2

< 5

< 2

< 6

< 3

< 14

< 6 04/02/20 - 07/02/20

< 2

< 5

< 3

< 5

< 2

< 4

< 2

< 14

< 7 07/02/20 - 10/02/20

< 3

< 5

< 3

< 7

< 3

< 5

< 2

< 20

< 8 10/02/20 - 12/31/20

< 2

< 3

< 6

< 3

< 6

< 2

< 5

< 3

< 2

< 15

< 6 MEAN Q-37 01/03/20 - 04/03/20

< 4

< 7

< 4

< 10

< 3

< 6

< 4

< 3

< 21

< 7 04/03/20 - 07/03/20

< 3

< 8

< 3

< 6

< 4

< 6

< 4

< 3

< 18

< 6 07/03/20 - 10/02/20

< 2

< 6

< 2

< 6

< 2

< 4

< 3

< 2

< 21

< 10 10/02/20 - 12/31/20

< 3

< 4

< 8

< 4

< 8

< 3

< 6

< 3

< 18

< 7 MEAN Q-38 01/03/20 - 04/03/20

< 2

< 4

< 3

< 4

< 2

< 3

< 2

< 1

< 8

< 3 04/03/20 - 07/03/20

< 2

< 3

< 1

< 5

< 2

< 4

< 2

< 13

< 4 07/03/20 - 10/02/20

< 3

< 7

< 3

< 8

< 3

< 6

< 3

< 24

< 4 10/02/20 - 12/31/20

< 2

< 3

< 2

< 7

< 2

< 3

< 2

< 9

< 4 MEAN Q-41 01/02/20 - 04/02/20

< 2

< 3

< 4

< 2

< 5

< 2

< 4

< 2

< 9

< 5 04/02/20 - 07/02/20

< 2

< 5

< 2

< 5

< 2

< 3

< 2

< 10

< 5 07/02/20 - 10/02/20

< 2

< 4

< 2

< 4

< 2

< 3

< 2

< 18

< 5 10/02/20 - 12/31/20

< 2

< 5

< 2

< 4

< 2

< 3

< 2

< 10

< 4 MEAN Q-42 01/02/20 - 04/02/20

< 2

< 5

< 2

< 3

< 2

< 3

< 2

< 1

< 9

< 2 04/02/20 - 07/02/20

< 2

< 4

< 3

< 4

< 2

< 3

< 1

< 2

< 11

< 8 07/02/20 - 10/02/20

< 2

< 5

< 2

< 4

< 2

< 4

< 2

< 16

< 6 10/02/20 - 12/31/20

< 2

< 5

< 3

< 6

< 2

< 4

< 3

< 2

< 13

< 5 MEAN C-10

COLLECTION PERIOD Q-01 Q-02 Q-03 Q-04 Q-13 Q-16 Q-37 Q-38 Q-41 01/02/20 - 01/10/20

< 21

< 49

< 54

< 31

< 29

< 28

< 26

< 31 01/09/20 - 01/17/20

< 48

< 42

< 47

< 45

< 20

< 48 01/16/20 - 01/24/20

< 45

< 21

< 35

< 33

< 15

< 36

< 35 01/23/20 - 01/31/20

< 32

< 33

< 32

< 28

< 24

< 23

< 21

< 24 01/30/20 - 02/07/20

< 27

< 24

< 42

< 41

< 40

< 18

< 42 02/06/20 - 02/14/20

< 21

< 25

< 22

< 42

< 49

< 42

< 17 02/14/20 - 02/20/20

< 23

< 24

< 23

< 13

< 23

< 19

< 18

< 23 02/20/20 - 02/28/20

< 33

< 17

< 33

< 35

< 12

< 25

< 27

< 26 02/27/20 - 03/06/20

< 23

< 55

< 57

< 55

< 59

< 33

< 31

< 25

< 34

< 33 03/05/20 - 03/13/20

< 20

< 17

< 25

< 24

< 11

< 25 03/12/20 - 03/20/20

< 40

< 19

< 41

< 36

< 21

< 36

< 35

< 32

< 31 03/20/20 - 03/26/20

< 32

< 34

< 19

< 46

< 37

< 36

< 46

< 31 03/26/20 - 04/03/20

< 34

< 35

< 16

< 36

< 28

< 27

< 22

< 28 04/02/20 - 04/10/20

< 54

< 53

< 55

< 25

< 37

< 34

< 37

< 18 04/09/20 - 04/17/20

< 31

< 32

< 31

< 40

< 34

< 24

< 39

< 40 04/16/20 - 04/24/20

< 45

< 47

< 45

< 20

< 34

< 32

< 34

< 29 04/23/20 - 05/01/20

< 29

< 30

< 29

< 17

< 34

< 37

< 37 04/30/20 - 05/08/20

< 36

< 62

< 37

< 36

< 18

< 17

< 14

< 19 05/07/20 - 05/15/20

< 30

< 18

< 31

< 30

< 33

< 43

< 40

< 43

< 18 05/14/20 - 05/22/20

< 43

< 19

< 45

< 43

< 46

< 38

< 35

< 21

< 38 05/21/20 - 05/29/20

< 29

< 30

< 29

< 18

< 54

< 50

< 54

< 23 05/28/20 - 06/05/20

< 20

< 31

< 30

< 33

< 15

< 28

< 30

< 30 06/04/20 - 06/12/20

< 47

< 20

< 49

< 47

< 51

< 34

< 31

< 33

< 19 06/11/20 - 06/19/20

< 30

< 17

< 31

< 30

< 32

< 16

< 33

< 35

< 36 06/18/20 - 06/26/20

< 56

< 24

< 58

< 56

< 59

< 56

< 53

< 31

< 56 06/25/20 - 07/03/20

< 23

< 24

< 23

< 14

< 36

< 33

< 15

< 36 07/02/20 - 07/10/20

< 42

< 18

< 44

< 42

< 46

< 38

< 35

< 36

< 22

< 38 07/09/20 - 07/17/20

< 21

< 17

< 35

< 33

< 34

< 35

< 19 07/16/20 - 07/24/20

< 54

< 24

< 56

< 54

< 59

< 26

< 57

< 59

< 62

< 61 07/23/20 - 07/31/20

< 56

< 57

< 56

< 25

< 40

< 16

< 39

< 41

< 40 07/30/20 - 08/07/20

< 37

< 38

< 37

< 17

< 39

< 37

< 39

< 16

< 39 08/06/20 - 08/14/20

< 30

< 31

< 30

< 18

< 31

< 56

< 58

< 53

< 50 08/13/20 - 08/21/20

< 45

< 23

< 45

< 44

< 38

< 45 08/20/20 - 08/28/20

< 55

< 57

< 55

< 26

< 54

< 21

< 51

< 54

< 54 08/27/20 - 09/04/20

< 57

< 25

< 59

< 57

< 61

< 38

< 35

< 36

< 32

< 38 09/03/20 - 09/11/20

< 39

< 40

< 39

< 36

< 48

< 43

< 45

< 47

< 22 09/10/20 - 09/18/20

< 15

< 35

< 31

< 39

< 45

< 16

< 39 09/18/20 - 09/25/20

< 30

< 24

< 31

< 30

< 39

< 40

< 38

< 26 09/25/20 - 10/02/20

< 47

< 20

< 48

< 46

< 53

< 55

< 22

< 53 10/02/20 - 10/09/20

< 26

< 11

< 27

< 26

< 36

< 37

< 36

< 30 10/09/20 - 10/17/20

< 27

< 12

< 28

< 26

< 15

< 8

< 15

< 15 10/17/20 - 10/24/20

< 35

< 24

< 36

< 35

< 32

< 16

< 34

< 32

< 33 10/24/20 - 10/31/20

< 27

< 22

< 28

< 27

< 28

< 29

< 13

< 29 10/31/20 - 11/07/20

< 37

< 19

< 39

< 37

< 30

< 31

< 30

< 16 11/07/20 - 11/14/20

< 33

< 28

< 34

< 33

< 50

< 52

< 50

< 22 11/14/20 - 11/20/20

< 55

< 57

< 64

< 24

< 53

< 64

< 65 11/20/20 - 11/27/20

< 61

< 27

< 63

< 52

< 41

< 48

< 41

< 41 11/27/20 - 12/04/20

< 42

< 18

< 43

< 40

< 36

< 37

< 38

< 36

< 15 12/04/20 - 12/11/20

< 15

< 33

< 41

< 21

< 32

< 33

< 42

< 41 12/11/20 - 12/18/20

< 14

< 31

< 25

< 15

< 18

< 19

< 15

< 15 12/18/20 - 12/26/20

< 47

< 24

< 49

< 46

< 43

< 44

< 46

< 36

< 43 12/26/20 - 12/31/20

< 62

< 29

< 64

< 63

< 61

< 29

< 61

< 62 MEAN Q-42 TABLE C-VI.1 CONCENTRATIONS OF I-131 IN AIR IODINE SAMPLES COLLECTED GROUP III GROUP II IN THE VICINITY OF QUAD CITIES NUCLEAR POWER STATION, 2020 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA GROUP I C-11

Table C-VII.1 COLLECTION PERIOD 01/03/20

< 0.7 02/07/20

< 0.9 03/06/20

< 0.7 04/03/20

< 0.6 05/01/20

< 0.9 05/15/20

< 0.7 05/29/20

< 0.8 06/12/20

< 0.8 06/26/20

< 0.7 07/10/20

< 0.9 07/24/20

< 1.0 08/07/20

< 0.8 08/21/20

< 0.7 09/04/20

< 0.8 09/18/20

< 0.9 10/02/20

< 0.9 10/17/20

< 0.6 11/07/20

< 0.9 12/04/20

< 0.9 MEAN INDICATOR FARM Q-26 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA CONCENTRATIONS OF I-131 IN MILK SAMPLES COLLECTED IN THE VICINITY OF QUAD CITIES NUCLEAR POWER STATION, 2020 C-12

Table C-VII.2 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 Q-26 01/03/20

< 8

< 9

< 24

< 10

< 18

< 8

< 11

< 9

< 37

< 7 02/07/20

< 7

< 14

< 8

< 11

< 7

< 13

< 9

< 33

< 13 03/06/20

< 8

< 18

< 7

< 18

< 6

< 11

< 7

< 6

< 29

< 9 04/03/20

< 8

< 7

< 16

< 9

< 14

< 7

< 12

< 8

< 6

< 28

< 9 05/01/20

< 6

< 15

< 8

< 15

< 7

< 14

< 8

< 34

< 5 05/15/20

< 6

< 16

< 8

< 16

< 7

< 12

< 7

< 6

< 27

< 11 05/29/20

< 7

< 8

< 16

< 7

< 15

< 10

< 12

< 8

< 9

< 37

< 12 06/12/20

< 7

< 6

< 12

< 7

< 15

< 7

< 10

< 7

< 31

< 6.4 06/26/20

< 5

< 6

< 15

< 7

< 15

< 7

< 12

< 6

< 7

< 34

< 9 07/10/20

< 8

< 19

< 5

< 16

< 8

< 12

< 8

< 37

< 13 07/24/20

< 6

< 7

< 15

< 6

< 13

< 7

< 13

< 8

< 7

< 35

< 9 08/07/20

< 7

< 6

< 11

< 8

< 14

< 6

< 12

< 8

< 6

< 34

< 9 08/21/20

< 6

< 16

< 9

< 15

< 7

< 12

< 7

< 6

< 30

< 7 09/04/20

< 6

< 7

< 17

< 6

< 14

< 7

< 14

< 9

< 7

< 28

< 11 09/18/20

< 7

< 9

< 17

< 9

< 19

< 9

< 14

< 9

< 10

< 32

< 12 10/02/20

< 6

< 15

< 6

< 15

< 6

< 12

< 7

< 6

< 30

< 10 10/17/20

< 6

< 5

< 16

< 7

< 16

< 7

< 13

< 7

< 8

< 29

< 11 11/07/20

< 7

< 18

< 6

< 15

< 8

< 13

< 7

< 8

< 31

< 11 12/04/20

< 10

< 12

< 24

< 10

< 25

< 14

< 20

< 12

< 47

< 10 MEAN (1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION CONCENTRATIONS OF GAMMA EMITTERS IN MILK SAMPLES COLLECTED IN THE VICINITY OF QUAD CITIES NUCLEAR POWER STATION, 2020 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA C-13

Table C-VIII.1 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 Q-CONTROL Broccoli 07/20/20

< 28

< 27

< 65

< 33

< 63

< 26

< 50

< 30

< 32

< 27

< 98

< 27 Potatoes 07/20/20

< 15

< 11

< 32

< 13

< 34

< 12

< 25

< 15

< 53

< 10 MEAN Q-QUAD 1 Lettuce/Kale 07/20/20

< 20

< 19

< 51

< 23

< 52

< 19

< 36

< 26

< 30

< 24

< 107

< 14 Turnips 07/20/20

< 19

< 17

< 47

< 22

< 38

< 12

< 34

< 18

< 52

< 19 MEAN Q-QUAD 2 Cabbage/Zucchini/

Cucumber 07/20/20

< 36

< 33

< 81

< 29

< 86

< 37

< 53

< 39

< 36

< 34

< 133

< 20 Carrots/Onions 07/20/20

< 55

< 49

< 94

< 50

< 121

< 50

< 77

< 50

< 57

< 54

< 224

< 58 MEAN Q-QUAD 3 Lettuce 07/20/20

< 25

< 17

< 55

< 19

< 51

< 22

< 35

< 24

< 28

< 30

< 77

< 14 Horseradish 07/20/20

< 44

< 40

< 90

< 50

< 115

< 48

< 65

< 54

< 43

< 55

< 178

< 43 MEAN Q-QUAD 4 Kale 07/20/20

< 22

< 16

< 56

< 18

< 60

< 21

< 32

< 28

< 23

< 26

< 78

< 17 Beets 07/20/20

< 19

< 42

< 20

< 47

< 21

< 31

< 23

< 19

< 80

< 17 MEAN CONCENTRATIONS OF GAMMA EMITTERS IN FOOD PRODUCT SAMPLES COLLECTED IN THE VICINITY OF QUAD CITIES NUCLEAR POWER STATION, 2020 RESULTS IN UNITS OF PCI/KG WET +/- 2 SIGMA C-14

Table C-IX.1 QUARTERLY DLR RESULTS FOR QUAD CITIES NUCLEAR POWER STATION, 2020 1

2 3

4 1

2 3

4 Other Q-01 11.4 15.9 12.7 11.1 12.6 12.7 ND ND ND ND Q-02 11.6 16.1 9.9 11.4 12.0 11.4 ND ND ND ND Q-03 10.5 15.0 10.5 9.9 10.4 11.0 ND ND ND ND Q-04 12.1 16.6 12.0 11.4 14.1 5.2 ND ND ND ND Q-13 13.1 17.6 14.1 13.4 14.5 13.0 ND ND ND ND Q-16 10.8 15.3 10.4 10.4 11.8 11.2 ND ND ND ND Q-37 13.6 18.1 12.6 13.5 15.6 13.1 ND ND ND ND Q-38 14.5 19.0 14.7 15.2 16.3 15.1 ND ND ND ND Q-41 13.4 17.9 13.2 12.5 14.0 12.4 ND ND ND ND Q-42 14.4 18.9 14.3 14.6 15.5 15.0 ND ND ND ND Inner Q-101-1 11.7 16.2 11.6 12.1 13.1 13.4 ND ND ND ND Q-101-2 12.2 16.7 12.6 12.6 13.8 11.4 ND ND ND ND Q-102-1 13 17.5 12.9 14.9 15.1 13.4 ND ND ND ND Q-102-3 12.2 16.7 11.4 11.5 13.3 13.6 ND ND ND ND Q-103-1 10.9 15.4 11.7 12.0 11.3 13.6 ND ND ND ND Q-103-2 11 15.5 9.9 10.5 12.6 10.8 ND ND ND ND Q-104-1 11.2 15.7 11.1 10.4 11.9 11.5 ND ND ND ND Q-104-2 11.8 16.3 10.1 10.7 12.9 12.2 ND ND ND ND Q-105-1 11.3 15.8 12.4 11.8 13.1 12.0 ND ND ND ND Q-105-2 11.7 16.2 10.7 11.1 13.2 11.1 ND ND ND ND Q-106-2 11.9 16.4 11.2 11.9 11.8 11.4 ND ND ND ND Q-106-3 11.5 16.0 10.5 11.7 12.6 12.8 ND ND ND ND Q-107-2 11.5 16.0 12.3 11.5 12.9 14.8 ND ND ND ND Q-107-3 11.6 16.1 12.1 10.8 13.5 12.6 ND ND ND ND Q-108-1 11.7 16.2 11.2 11.9 11.7 12.6 ND ND ND ND Q-108-2 11.5 16.0 11.3 12.3 14.2 10.9 ND ND ND ND Q-109-1 12.1 16.6 10.6 12.0 13.2 11.7 ND ND ND ND Q-109-2 11.8 16.3 11.8 11.6 12.7 12.6 ND ND ND ND Q-111-1 12 16.5 11.6 (1)

(1) 13.2 ND ND ND ND Q-111-2 12.2 16.7 12.4 12.5 12.6 (1)

ND ND ND ND Q-112-1 12 16.5 11.7 11.7 12.6 11.7 ND ND ND ND Q-112-2 11.3 15.8 10.8 12.2 (1) 13.4 ND ND ND ND Q-113-1 11.4 15.9 10.7 11.4 12.4 12.2 ND ND ND ND Q-113-2 10.8 15.3 9.8 10.6 11.5 11.1 ND ND ND ND Q-114-1 10.9 15.4 11.8 10.3 11.5 12.1 ND ND ND ND Q-114-2 12.4 16.9 12.7 12.8 14.7 11.7 ND ND ND ND Q-115-1 12 16.5 12.5 11.8 14.0 12.2 ND ND ND ND Q-115-2 11.3 15.8 12.1 12.7 11.4 11.1 ND ND ND ND Q-116-1 13.3 17.8 13.8 13.3 15.0 14.8 ND ND ND ND Q-116-3 12.3 16.8 12.4 12.5 13.2 14.5 ND ND ND ND Outer Q-201-1 12.6 17.1 12.2 13.2 13.9 13.9 ND ND ND ND Q-201-2 13.6 18.1 13.2 15.2 (1)

(1)

ND ND ND ND Q-202-1 11.5 16.0 11.8 11.8 12.7 12.2 ND ND ND ND Q-202-2 12.8 17.3 12.9 12.8 14.5 14.3 ND ND ND ND Q-203-1 13.1 17.6 13.6 13.2 13.7 13.0 ND ND ND ND Q-203-2 15.6 20.1 16.3 15.0 17.6 17.1 ND ND ND ND Q-204-1 14 18.5 13.8 13.2 15.9 13.5 ND ND ND ND Q-204-2 15.4 19.9 15.4 15.6 17.7 16.5 ND ND ND ND Q-205-1 13.7 18.2 13.6 14.5 15.4 14.2 ND ND ND ND Q-205-4 15.1 19.6 14.8 15.0 16.1 16.2 ND ND ND ND Location Quarterly Baseline, BQ (mrem)

BQ + MDDQ (mrem) 2019 Normalized Net Dose, MQX (mrem/std. Qtr.)

Quarterly Facility Dose, FQ (mrem)

Monitoring Location C-15 I

I I

I

Table C-IX.1 QUARTERLY DLR RESULTS FOR QUAD CITIES NUCLEAR POWER STATION, 2020 1

2 3

4 1

2 3

4 Location Quarterly Baseline, BQ (mrem)

BQ + MDDQ (mrem) 2019 Normalized Net Dose, MQX (mrem/std. Qtr.)

Quarterly Facility Dose, FQ (mrem)

Monitoring Location Outer Q-206-1 12.6 17.1 13.3 12.8 14.5 13.3 ND ND ND ND (cont'd)

Q-206-2 11.8 16.3 12.1 12.9 11.9 12.3 ND ND ND ND Q-207-1 13.1 17.6 13.4 13.3 15.6 12.6 ND ND ND ND Q-207-4 13.7 18.2 13.4 13.8 15.4 12.9 ND ND ND ND Q-208-1 12.9 17.4 13.7 12.4 14.6 14.4 ND ND ND ND Q-208-2 14.4 18.9 14.2 14.9 17.1 14.2 ND ND ND ND Q-209-1 13.9 18.4 13.9 15.2 15.7 (1)

ND ND ND ND Q-209-4 13.4 17.9 11.8 14.5 15.2 14.7 ND ND ND ND Q-210-1 14.9 19.4 13.8 14.3 15.7 16.7 ND ND ND ND Q-210-4 14.6 19.1 14.6 14.5 14.5 16.7 ND ND ND ND Q-210-5 10.6 15.1 11.2 10.3 11.5 9.7 ND ND ND ND Q-211-1 16 20.5 14.0 16.1 17.6 17.1 ND ND ND ND Q-211-2 16.4 20.9 16.1 16.8 18.5 16.4 ND ND ND ND Q-212-1 12.9 17.4 12.1 13.4 12.8 13.8 ND ND ND ND Q-212-2 10.8 15.3 10.0 10.1 10.8 11.2 ND ND ND ND Q-213-1 11.9 16.4 10.8 11.9 13.7 12.9 ND ND ND ND Q-213-2 11.3 15.8 11.1 11.3 12.5 13.2 ND ND ND ND Q-214-1 12.6 17.1 12.3 14.0 14.1 14.1 ND ND ND ND Q-214-2 13.6 18.1 14.3 13.5 14.3 15.3 ND ND ND ND Q-215-1 12.3 16.8 13.2 14.7 14.3 15.0 ND ND ND ND Q-215-2 13.8 18.3 13.7 13.7 16.1 (1)

ND ND ND ND Q-216-1 15.1 19.6 15.2 16.3 17.9 14.6 ND ND ND ND Q-216-2 14.1 18.6 15.6 15.2 15.7 (1)

ND ND ND ND ND = Not Detected (1) Environmental Dosimetry lost for this period - see Program Exceptions, table D-2 for details C-16 I

I I

I

Table C-IX.2 ANNUAL DLR RESULTS FOR QUAD CITIES NUCLEAR POWER STATION, 2020 Annual Baseline, BA (mrem)

BA + MDDA (mrem)

Normalized Annual Dose, MA (mrem/yr)

Annual Facility Dose, FA Other Q-01 49.5 59.3 49.1 ND Q-02 48.1 57.9 44.7 ND Q-03 46.1 55.9 41.8 ND Q-04 50.3 60.1 42.7 ND Q-13 54.5 64.3 55.0 ND Q-16 43.9 53.7 43.8 ND Q-37 56.9 66.7 54.8 ND Q-38 61.2 71.0 61.3 ND Q-41 52.9 62.7 52.1 ND Q-42 59.2 69.0 59.4 ND Inner Q-101-1 49.3 59.1 50.2 ND Q-101-2 52.1 61.9 50.4 ND Q-102-1 52.4 62.2 56.3 ND Q-102-3 52.4 62.2 49.8 ND Q-103-1 48.3 58.1 48.6 ND Q-103-2 48.8 58.6 43.8 ND Q-104-1 48.7 58.5 44.9 ND Q-104-2 48.1 57.9 45.9 ND Q-105-1 49.9 59.7 49.3 ND Q-105-2 47.6 57.4 46.1 ND Q-106-2 51.6 61.4 46.3 ND Q-106-3 49.2 59.0 47.6 ND Q-107-2 50.2 60.0 51.5 ND Q-107-3 49.7 59.5 49.0 ND Q-108-1 49.7 59.5 47.4 ND Q-108-2 49.0 58.8 48.7 ND Q-109-1 52.2 62.0 47.5 ND Q-109-2 49.3 59.1 48.7 ND Q-111-1 52.3 62.1 49.6 ND Q-111-2 49.4 59.2 50.0 ND Q-112-1 48.3 58.1 47.7 ND Q-112-2 46.5 56.3 48.5 ND Q-113-1 46.5 56.3 46.7 ND Q-113-2 44.0 53.8 43.0 ND Q-114-1 45.0 54.8 45.7 ND Q-114-2 54.2 64.0 51.9 ND Q-115-1 49.9 59.7 50.5 ND Q-115-2 49.4 59.2 47.3 ND Q-116-1 54.9 64.7 56.9 ND Q-116-3 53.7 63.5 52.6 ND Outer Q-201-1 52.0 61.8 53.2 ND Q-201-2 55.1 64.9 56.8 ND Q-202-1 46.9 56.7 48.5 ND Q-202-2 53.7 63.5 54.5 ND Q-203-1 54.0 63.8 53.5 ND Q-203-2 64.2 74.0 66.0 ND Q-204-1 59.9 69.7 56.4 ND Q-204-2 63.0 72.8 65.2 ND Q-205-1 59.8 69.6 57.7 ND Q-205-4 64.4 74.2 62.1 ND Monitoring Location C-17

Table C-IX.2 ANNUAL DLR RESULTS FOR QUAD CITIES NUCLEAR POWER STATION, 2020 Annual Baseline, BA (mrem)

BA + MDDA (mrem)

Normalized Annual Dose, MA (mrem/yr)

Annual Facility Dose, FA Monitoring Location Outer Q-206-1 55.6 65.4 53.9 ND (cont'd)

Q-206-2 52.6 62.4 49.2 ND Q-207-1 54.2 64.0 54.9 ND Q-207-4 56.8 66.6 55.5 ND Q-208-1 52.5 62.3 55.1 ND Q-208-2 60.6 70.4 60.4 ND Q-209-1 61.9 71.7 59.7 ND Q-209-4 57.6 67.4 56.2 ND Q-210-1 60.7 70.5 60.5 ND Q-210-4 60.7 70.5 60.3 ND Q-210-5 47.1 56.9 42.7 ND Q-211-1 65.2 75.0 64.8 ND Q-211-2 66.7 76.5 67.8 ND Q-212-1 54.1 63.9 52.1 ND Q-212-2 44.5 54.3 42.1 ND Q-213-1 48.1 57.9 49.3 ND Q-213-2 45.9 55.7 48.1 ND Q-214-1 53.6 63.4 54.5 ND Q-214-2 58.3 68.1 57.4 ND Q-215-1 55.8 65.6 57.2 ND Q-215-2 56.1 65.9 58.0 ND Q-216-1 63.4 73.2 64.0 ND Q-216-2 60.1 69.9 62.0 ND ND = Not Detected (1) Environmental Dosimetry lost for this period - see Program Exceptions, table D-2 for details C-18

FIGURE C-1 Surface Water - Gross Beta - Stations Q-33 and Q-34 (C)

Collected in the Vicinity of QCNPS, 2000 - 2020 DUE TO VENDOR CHANGE, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE 2005 AND MDC VALUES AFTER JULY 2005 0.0 2.0 4.0 6.0 8.0 10.0 12.0 01-01-00 03-14-04 05-26-08 08-07-12 10-19-16 12-31-20 pCi/L Q-33 Cordova 0.0 2.0 4.0 6.0 8.0 10.0 12.0 01-01-00 03-14-04 05-26-08 08-07-12 10-19-16 12-31-20 pCi/L Q-34 (C) Camanche C-19

Collected in the Vicinity of QCNPS, 2000 - 2020 FIGURE C-2 Surface Water - Tritium - Stations Q-33 and Q-34 (C)

DUE TO VENDOR CHANGE, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE 2005 AND MDC VALUES AFTER JULY 2005 0

100 200 300 400 500 01-01-00 03-14-04 05-26-08 08-07-12 10-19-16 12-31-20 pCi/L Q-33 Cordova 0

100 200 300 400 500 01-01-00 03-14-04 05-26-08 08-07-12 10-19-16 12-31-20 pCi/L Q-34 (C) Camanche C-20

FIGURE C-3 Ground Water - Tritium - Stations Q-35 and Q-36 Collected in the Vicinity of QCNPS, 2000 - 2020 DUE TO VENDOR CHANGE, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE 2005 AND MDC VALUES AFTER JULY 2005 0

100 200 300 400 500 12-31-99 03-13-04 05-25-08 08-06-12 10-18-16 12-30-20 pCi/L Q-35 McMillan Well 0

100 200 300 400 500 12-31-99 03-13-04 05-25-08 08-06-12 10-18-16 12-30-20 pCi/L Q-36 Cordova Well C-21

Air Particulates - Gross Beta-Stations Q-01 and Q-02 FIGURE C-4 Collected in the Vicinity of QCNPS, 2000 - 2020 0.0 10.0 20.0 30.0 40.0 50.0 60.0 70.0 01-07-00 03-19-04 05-30-08 08-10-12 10-21-16 01-01-21 10E-03 pCi/m3 Q-02 Onsite No. 2 0.0 10.0 20.0 30.0 40.0 50.0 60.0 70.0 01-07-00 03-19-04 05-30-08 08-10-12 10-21-16 01-01-21 10E-03 pCi/m3 Q-01 Onsite No. 1 C-22

Air Particulates - Gross Beta-Stations Q-03 and Q-04 FIGURE C-5 Collected in the Vicinity of QCNPS, 2000 - 2020 0.0 10.0 20.0 30.0 40.0 50.0 60.0 01-07-00 03-19-04 05-30-08 08-10-12 10-21-16 01-01-21 10E-03 pCi/m3 Q-03 Onsite No. 3 0.0 10.0 20.0 30.0 40.0 50.0 60.0 01-07-00 03-19-04 05-30-08 08-10-12 10-21-16 01-01-21 10E-03 pCi/m3 Q-04 Nitrin C-23

This location was removed from the program in January 2011 due to updated annual average meteorology.

FIGURE C-6 Air Particulates - Gross Beta-Station Q-07 (C)

Collected in the Vicinity of QCNPS, 2000 - 2010 This data is retained in the report for historical comparision.

0.0 10.0 20.0 30.0 40.0 50.0 60.0 70.0 01-07-00 03-19-02 05-29-04 08-09-06 10-19-08 12-30-10 10E-03 pCi/m3 Q-07 (C) Clinton C-24

AIR PARTICULATE GROSS BETA ANALYSES OF FAR FIELD LOCATIONS STARTED IN JULY 2005 FIGURE C-7 Air Particulates - Gross Beta-Stations Q-13 and Q-16 Collected in the Vicinity of QCNPS, 2005 - 2020 0.0 10.0 20.0 30.0 40.0 50.0 60.0 07-08-05 05-22-09 04-05-13 02-17-17 01-01-21 10E-03 pCi/m3 Q-13 Princeton 0.0 10.0 20.0 30.0 40.0 50.0 60.0 07-08-05 05-22-09 04-05-13 02-17-17 01-01-21 Q-16 Low Moor C-25

AIR PARTICULATE GROSS BETA ANALYSES OF FAR FIELD LOCATIONS STARTED IN JULY 2005 FIGURE C-8 Air Particulates - Gross Beta-Stations Q-37 and Q-38 Collected in the Vicinity of QCNPS, 2005 - 2020 0.0 10.0 20.0 30.0 40.0 50.0 60.0 12-31-04 02-28-05 04-30-05 06-30-05 08-31-05 10-31-05 12-31-05 10E-03 pCi/m3 Q-13 Princeton 0.0 10.0 20.0 30.0 40.0 50.0 60.0 12-31-04 02-28-05 04-30-05 06-30-05 08-31-05 10-31-05 12-31-05 Q-13 Princeton 0.0 10.0 20.0 30.0 40.0 50.0 60.0 07-08-05 05-22-09 04-05-13 02-17-17 01-01-21 10E-03 pCi/m3 Q-37 Meredosia Road 0.0 10.0 20.0 30.0 40.0 50.0 60.0 07-01-05 05-17-09 04-02-13 02-16-17 01-02-21 10E-03 pCi/m3 Q-38 Fuller Road C-26

FIGURE C-9 Air Particulates - Gross Beta-Station Q-41 Collected in the Vicinity of QCNPS, 2009 - 2020 Air Particulates - Gross Beta-Station Q-42 (C)

Collected in the Vicinity of QCNPS, 2010 - 2020 0.0 10.0 20.0 30.0 40.0 50.0 60.0 01-03-09 01-04-12 01-04-15 01-04-18 01-04-21 10E-03 pCi/m3 Q-41 Camanche 0.0 10.0 20.0 30.0 40.0 50.0 60.0 12-31-10 07-02-13 01-02-16 07-04-18 01-03-21 10E-03 pCi/m3 Q-42 LeClaire (Control)

C-27

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APPENDIX D INTER-LABORATORY COMPARISON PROGRAM

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Month/Year Identification Number Matrix Nuclide Units TBE Value Known Value (a)

Ratio of TBE to Known Result Evaluation (b)

September 2020 E13247 Milk Sr-89 pCi/L 62.8 95.4 0.66 N(1)

Sr-90 pCi/L 12.0 12.8 0.94 A

E13248 Milk Ce-141 pCi/L 156 150 1.04 A

Co-58 pCi/L 172 180 0.96 A

Co-60 pCi/L 369 379 0.97 A

Cr-51 pCi/L 372 372 1.00 A

Cs-134 pCi/L 171 200 0.85 A

Cs-137 pCi/L 241 250 0.96 A

Fe-59 pCi/L 217 200 1.08 A

I-131 pCi/L 84.6 95.0 0.89 A

Mn-54 pCi/L 175 180 0.97 A

Zn-65 pCi/L 252 270 0.93 A

E13249 Charcoal I-131 pCi 70.2 75.8 0.93 A

E13250 AP Ce-141 pCi 101 101 1.00 A

Co-58 pCi 111 120 0.92 A

Co-60 pCi 249 254 0.98 A

Cr-51 pCi 287 249 1.15 A

Cs-134 pCi 114 134 0.85 A

Cs-137 pCi 159 168 0.95 A

Fe-59 pCi 127 134 0.95 A

Mn-54 pCi 114 121 0.94 A

Zn-65 pCi 168 181 0.93 A

E13251 Soil Ce-141 pCi/g 0.241 0.191 1.26 W

Co-58 pCi/g 0.211 0.228 0.93 A

Co-60 pCi/g 0.466 0.481 0.97 A

Cr-51 pCi/g 0.450 0.472 0.95 A

Cs-134 pCi/g 0.273 0.254 1.07 A

Cs-137 pCi/g 0.370 0.390 0.95 A

Fe-59 pCi/g 0.233 0.254 0.92 A

Mn-54 pCi/g 0.217 0.229 0.95 A

Zn-65 pCi/g 0.368 0.343 1.07 A

E13252 AP Sr-89 pCi 79.9 100.0 0.80 A

Sr-90 pCi 12.1 13.4 0.90 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 20-19 Analytics Environmental Radioactivity Cross Check Program Teledyne Brown Engineering Environmental Services (Page 1 of 2)

Table D-1 D-1

Month/Year Identification Number Matrix Nuclide Units TBE Value Known Value (a)

Ratio of TBE to Known Result Evaluation (b)

Analytics Environmental Radioactivity Cross Check Program Teledyne Brown Engineering Environmental Services December 2020 E13254 Milk Sr-89 pCi/L 82.2 89.7 0.92 A

Sr-90 pCi/L 12.4 13.0 0.96 A

E13255 Milk Ce-141 pCi/L 91.1 100 0.91 A

Co-58 pCi/L 77.5 84.3 0.92 A

Co-60 pCi/L 147 152 0.97 A

Cr-51 pCi/L 259 253 1.02 A

Cs-134 pCi/L 97.1 108 0.90 A

Cs-137 pCi/L 117 127 0.92 A

Fe-59 pCi/L 114 112 1.02 A

I-131 pCi/L 84.3 91.9 0.92 A

Mn-54 pCi/L 137 143 0.96 A

Zn-65 pCi/L 175 190 0.92 A

E13256 Charcoal I-131 pCi 70.2 78.2 0.90 A

E13257A AP Ce-141 pCi 67.4 74.6 0.90 A

Co-58 pCi 57.9 62.9 0.92 A

Co-60 pCi 108 113 0.95 A

Cr-51 pCi 162 189 0.86 A

Cs-134 pCi 68.1 80.4 0.85 A

Cs-137 pCi 82.4 95.0 0.87 A

Fe-59 pCi 80.5 83.7 0.96 A

Mn-54 pCi 102 107 0.95 A

Zn-65 pCi 115 142 0.81 A

E13258 Soil Ce-141 pCi/g 0.167 0.170 0.98 A

Co-58 pCi/g 0.125 0.143 0.87 A

Co-60 pCi/g 0.245 0.257 0.95 A

Cr-51 pCi/g 0.393 0.429 0.92 A

Cs-134 pCi/g 0.147 0.183 0.80 A

Cs-137 pCi/g 0.260 0.288 0.90 A

Fe-59 pCi/g 0.199 0.190 1.05 A

Mn-54 pCi/g 0.229 0.243 0.94 A

Zn-65 pCi/g 0.320 0.322 0.99 A

E13259 AP Sr-89 pCi 85.0 78.6 1.08 A

Sr-90 pCi 13.1 11.4 1.15 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 (Page 2 of 2)

Table D-1 D-2

Month/Year Identification Number Matrix Nuclide Units TBE Value Known Value (a)

Acceptance Range Evaluation (b)

February 2020 20-GrF42 AP Gross Alpha Bq/sample 0.676 1.24 0.37 - 2.11 A

Gross Beta Bq/sample 2.03 2.00 1.00 - 3.00 A

20-MaS42 Soil Ni-63 Bq/kg 0.01 (1)

A Sr-90 Bq/kg 348 340 238 - 442 A

20-MaW42 Water Ni-63 Bq/L 11.6 11.1 7.8 - 14.4 A

Pu-238 Bq/L 0.926 0.94 0.66 - 1.22 A

Pu-239/240 Bq/L 0.712 0.737 0.516 - 0.958 A

20-RdF42 AP U-234/233 Bq/sample 0.0416 0.075 0.053 - 0.098 N(3)

U-238 Bq/sample 0.0388 0.078 0.055 - 0.101 N(3) 20-RdV42 Vegetation Cs-134 Bq/sample 3.23 3.82 2.67 - 4.97 A

Cs-137 Bq/sample 2.64 2.77 1.94 - 3.60 A

Co-57 Bq/sample 0.0281 (1)

A Co-60 Bq/sample 2.62 2.79 1.95 - 3.63 A

Mn-54 Bq/sample 4.3 4.58 3.21 - 5.95 A

Sr-90 Bq/sample 0.396 0.492 0.344 - 0.640 A

Zn-65 Bq/sample 3.93 3.79 2.65 - 4.93 A

August 2020 20-GrF43 AP Gross Alpha Bq/sample 0.267 0.528 0.158 - 0.898 A

Gross Beta Bq/sample 0.939 0.915 0.458 - 1.373 A

20-MaS43 Soil Ni-63 Bq/kg 438 980 686 - 1274 N(4)

Tc-99 Bq/kg 1.11 (1)

A 20-MaW43 Water Ni-63 Bq/L 0.175 (1)

A Tc-99 Bq/L 8.8 9.4 6.6 - 12.2 A

20-RdV43 Vegetation Cs-134 Bq/sample 3.635 4.94 3.46 - 6.42 W

Cs-137 Bq/sample 0.0341 (1)

A Co-57 Bq/sample 5.855 6.67 4.67 - 8.67 W

Co-60 Bq/sample 3.122 4.13 2.89 - 5.37 W

Mn-54 Bq/sample 4.524 5.84 4.09 - 7.59 A

Sr-90 Bq/sample 1.01 1.39 0.97 - 1.81 W

Zn-65 Bq/sample 4.706 6.38 4.47 - 8.29 W

(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 20-13 (4) See NCR 20-20 DOE's Mixed Analyte Performance Evaluation Program (MAPEP)

Teledyne Brown Engineering Environmental Services (Page 1 of 1)

Table D-2 D-3

Month/Year Identification Number Matrix Nuclide Units TBE Value Known Value (a)

Acceptance Limits Evaluation (b)

March 2020 MRAD-32 Water Am-241 pCi/L 52.5 45.3 31.1 - 57.9 A

Fe-55 pCi/L 155 152 89.3 - 221 A

Pu-238 pCi/L 34.0 36.4 21.9 - 47.2 A

Pu-239 pCi/L 30.9 33.6 20.8 - 41.4 A

April 2020 RAD-121 Water Ba-133 pCi/L 41.8 41.8 34.0- 46.7 A

Cs-134 pCi/L 42.9 46.3 37.1 - 50.9 A

Cs-137 pCi/L 226 234 211 - 259 A

Co-60 pCi/L 52.4 50.3 45.3 - 57.9 A

Zn-65 pCi/L 83.3 86.8 78.1 - 104 A

GR-A pCi/L 20.1 23.6 11.9 - 31.6 A

GR-B pCi/L 45.6 60.5 41.7 - 67.2 A

U-Nat pCi/L 18.45 18.6 14.9 - 20.9 A

H-3 pCi/L 14200 14100 12300 - 15500 A

Sr-89 pCi/L 58.0 60.1 48.3 - 67.9 A

Sr-90 pCi/L 34.1 44.7 33.0 - 51.2 A

I-131 pCi/L 27.4 28.9 24.1 - 33.8 A

September 2020 MRAD-33 Soil Sr-90 pCi/Kg 4360 4980 1550 - 7760 A

AP Fe-55 pCi/Filter 189 407 149 - 649 A

U-234 pCi/Filter 17.9 18.3 13.6 - 21.4 A

U-238 pCi/Filter 19.1 18.1 13.7 - 21.6 A

Water Am-241 pCi/L 160 176 121 - 225 A

Fe-55 pCi/L 299 298 175 - 433 A

Pu-238 pCi/L 200 191 115 - 247 A

Pu-239 pCi/L 105 100 61.9 - 123 A

October 2020 RAD-123 Water Ba-133 pCi/L 37.1 37.0 29.8 - 41.6 A

Cs-134 pCi/L 50.6 52.7 42.5 - 58.0 A

Cs-137 pCi/L 131 131 118 - 146 A

Co-60 pCi/L 62.9 60.5 54.4 - 69.1 A

Zn-65 pCi/L 167 162 146 - 191 A

GR-A pCi/L 40.0 26.2 13.3 - 34.7 N(1)

GR-B pCi/L 47.5 69.1 48.0 - 76.0 N(1)

U-Nat pCi/L 17.2 20.3 16.3 - 22.7 A

H-3 pCi/L 23800 23200 20,300 - 25,500 A

Sr-89 pCi/L 41.1 43.3 33.4 - 50.5 A

Sr-90 pCi/L 28.5 30.2 22.0 - 35.0 A

I-131 pCi/L 22.9 28.2 23.5 - 33.1 N(2)

November 2020 QR111920K Water GR-A pCi/L 50.7 52.4 27.3 - 65.6 A

GR-B pCi/L 24.9 24.3 15.0 - 32.3 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 20-18 (2) See NCR 20-17 ERA Environmental Radioactivity Cross Check Program Teledyne Brown Engineering Environmental Services (Page 1 of 1)

Table D-3 D-4

APPENDIX E ERRATA DATA

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There is no errata data for 2020.

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APPENDIX F ANNUAL RADIOLOGICAL GROUNDWATER PROTECTION PROGRAM REPORT (ARGPPR)

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Docket No: 50-254 50-265 QUAD CITIES NUCLEAR POWER STATION UNITS 1 and 2 Annual Radiological Groundwater Protection Program Report 1 January through 31 December 2020 Prepared By Teledyne Brown Engineering Environmental Services Quad Cities Nuclear Power Station Cordova, IL 61242 April 2021 Exelon Generation

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i Table Of Contents I. Summary and Conclusions.............................................................................................. 3 II. Introduction...................................................................................................................... 6 A. Objectives of the RGPP....................................................................................... 6 B. Implementation of the Objectives........................................................................ 6 C. Program Description............................................................................................ 7 III. Program Description....................................................................................................... 8 A. Sample Analysis.................................................................................................. 8 B. Data Interpretation............................................................................................... 8 IV. Results and Discussion.............................................................................................. 10 A. Groundwater Results......................................................................................... 10 B. Summary of Results - Inter-laboratory Comparison Program........................... 11 C. Leaks, Spills, and Releases.............................................................................. 11 C. Trends............................................................................................................... 11 E. Investigations..................................................................................................... 11 F. Actions Taken.................................................................................................... 11

ii Appendices Appendix A Location Designation Tables Table A-1 Radiological Groundwater Protection Program - Sampling Locations, Quad Cities Nuclear Power Station, 2020 Figures Figure A-1 Sampling Locations Near the Site Boundary of the Quad Cities Nuclear Power Station, 2020 Figure A-2 Sentinel Monitoring Point Locations, Quad Cities Nuclear Power Station, 2020 Appendix B Data Tables Tables Table B-I.1 Concentrations of Tritium, Strontium, Gross Alpha and Gross Beta in Groundwater Samples Collected in the Vicinity of Quad Cities Nuclear Power Station, 2020 Table B-I.2 Concentrations of Gamma Emitters in Groundwater Samples Collected in the Vicinity of Quad Cities Nuclear Power Station, 2020 Table B-I.3 Concentrations of Hard-To-Detects in Groundwater Samples Collected in the Vicinity of Quad Cities Nuclear Power Station, 2020 Table B-II.1 Concentrations of Tritium in Groundwater Samples Collected and Analyzed by Quad Cities Station Personnel, 2020

I.

Summary and Conclusions In 2006, Exelon undertook a Fleetwide Assessment of groundwater at and in the vicinity of its nuclear power generating facilities for the presence of radionuclides.

The data collected from the Quad Cities Station as part of the Fleetwide Assessment was summarized in a report entitled "Hydrogeologic Investigation Report, Fleetwide Assessment, Quad Cities Generation Station, Cordova, Illinois", dated September 2006. This report on the Radiological Groundwater Protection Program (RGPP) conducted for the Quad Cities Nuclear Power Station (QCNPS) by Exelon Nuclear covers the period 01 January 2020 through 31 December 2020.

The Quad Cities Nuclear Power Station (QCNPS) has experienced leaks from underground piping and spills from systems containing radioactive water over its 40+ year history. These incidents have created a few areas of localized contamination within the owner-controlled area. The liquid scintillation analyses of groundwater in some of these areas show measurable concentrations of tritium (H-3).

On March 28, 2018, approximately three to four feet of water was observed in a Radwaste Piping Vault, located adjacent to monitoring well QC-GP-18. Samples were collected from the water in the vault as well as the groundwater in QC-GP-

18. Both samples had tritium concentration of approximately 4.5 million pCi/L.

Approximately 5,000 gallons of water was pumped from the vault and processed through the Stations Radwaste System on March 28, 2018. Remediation of the groundwater near the RW Pipe Vault began on March 29, 2018 via pumping from monitoring well QC-GP-18 and processing through the Stations Radwaste System.

On March 29, 2018, the station contacted the Illinois Environmental Protection Agency (IEPA) and Illinois Emergency Management Agency (IEMA) to report a release of a radionuclide pursuant to 35 Ill. Adm. Code 1010.202. The station also notified the Nuclear Regulatory Commission (NRC) of these report to state agencies to satisfy 10CFR50.72(b)(2)(xi), notification of the NRC for any event related to the health and safety of the public for which a notification to other government agencies has been or will be made (EN#53299).

The cause of release into the vault and QC-GP-18 was determined to be a leaking pipe clamp located within the RW Pipe Vault and degraded seams in the concrete vault which allowed water to seep from the vault into the surrounding groundwater. The pipe clamp was repaired and the concrete/degraded seams in the vault sealed.

On April 2, 2018, a remediation well (RW-1) was installed near the vault and QC-GP-18 to assist in remediating the tritium activity in groundwater. The remediation well began pumping groundwater on April 10, 2018 for processing through the Stations Radwaste System. On May 2, 2018 effluent from RW-1 was routed to the Discharge bay for release. On May 7, 2018 effluent from QC-GP-18 was routed to the Discharge Bay for release. On November 24, 2018,

both well remediation pumps were shut down for the winter season.

Remediation of the groundwater tritium activity in vicinity of the RW Pipe Vault resumed on March 12, 2020 via pumping from remediation well QC-RW-1 and QC-GP-18 with pump effluent routed to the Discharge Bay for release. Active pumping for remediation was discontinued for remainder of 2020 on December 22, 2020 due to winter weather. Between March 12, 2020 and December 22, 2020, approximately 1.8 million gallons of groundwater was pumped from the vicinity of the RW Pipe Vault for remediation purposes.

The RGPP designates wells into categories. Well designation categories include background, mid-field, perimeter, source and idle.

This report covers groundwater samples collected from the environment on station property in 2020. During that period, RGPP samples were collected from 34 locations.

2020 sample locations included 29 designated monitoring wells and 4 production wells (two of which are used for site drinking water), and 1 remediation well.

Sample frequency and analysis varies with well designation. Typical frequency/analysis include quarterly for tritium, annual for strontium, biennial for gamma, gross alpha, and every five years for iron-55 (Fe-55) and nickel-63 (Ni-63), depending on the designated well category. Samples from 18 of the designated monitoring wells were collected by a contractor (Environmental Inc.)

and analyzed by a contract lab (Teledyne Brown) and onsite station personnel.

The remaining sample locations were collected by site personnel and analyzed for tritium/gamma onsite by station personnel and by Teledyne Brown for tritium/gamma and other parameters.

In the case of tritium, Exelon specified that its contract laboratories achieve a lower limit of detection 10 times lower than that required by federal regulation.

Most of the tritium that was detected in groundwater at the Station is on the south and west side of the Reactor/Turbine buildings. Tritium concentrations ranged from less than the LLD of 200 pCi/L up to 101,000 pCi/L in a monitoring well.

Gamma-emitting radionuclides associated with licensed plant operations were not detected at concentrations greater than their respective Lower Limits of Detection (LLDs) as specified in the Offsite Dose Calculation Manual (ODCM).

Strontium-89 (Sr-89) was not detected at concentrations greater than the Lower Limit of Detection (LLD) of 10.0 pCi/L. Strontium-90 (Sr-90) was detected at one location with concentrations ranging from 7.2 - 11.5 pCi/L.

Gross Alpha analyses in the dissolved and suspended fractions were performed on groundwater samples in 2020.

Gross Alpha (dissolved) was not detected at concentrations greater than the Lower Limit of Detection (LLD). Gross Alpha (suspended) was not detected at concentrations greater than the Lower Limit of Detection (LLD).

Select Transuranic/Hard-To-Detect analyses were performed on 1 monitoring well. The analyses included Am-241, Cm-242, Cm-243/244, Pu-238, Pu-239/240, U-234, U-235, U-238, Fe-55 and Ni-63. U-234 was detected at one location with a concentration of 0.77 pCi/L. U-238 was detected at one location at a concentration of 0.76 pCi/L. U-234 and U-238 are commonly found in groundwater at low concentrations due to the naturally-occurring Radium (Uranium) Decay Series. All other Select Transuranic/Hard-To-Detect nuclides were not detected at concentrations greater than their respective MDCs.

In assessing all the data gathered for this report, it was concluded that the operation of QCNPS had no adverse radiological impact on the environment offsite of QCNPS.

II.

Introduction The Quad Cities Nuclear Power Station (QCNPS), consisting of two 2957 MWth boiling water reactor owned and operated by Exelon Corporation, is located in Cordova, Illinois along the Mississippi River. Unit No. 1 went critical on 16 March 1972. Unit No. 2 went critical on 02 December 1973. The site is located in northern Illinois, approximately 182 miles west of Chicago, Illinois.

A.

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

1. Identify suitable locations to monitor and evaluate potential impacts from station operations before significant radiological impact to the environment and potential drinking water sources.

2. Understand the local hydrogeologic regime in the vicinity of the station and maintain up-to-date knowledge of flow patterns on the surface and shallow subsurface.

3. Perform routine water sampling and radiological analysis of water from selected locations.

4. Report new leaks, spills, or other detections with potential radiological significance to stakeholders in a timely manner.

5. Regularly assess analytical results to identify adverse trends.

6. Take necessary corrective actions to protect groundwater resources B.

Implementation of the Objectives.

The objectives identified have been implemented at QCNPS as discussed below:

1. Exelon and its consultant identified locations as described in the Phase 1 study. Phase 1 studies were conducted by Conestoga Rovers and Associates (CRA) and the results and conclusions were made available to state and federal regulators in station specific reports.

2. The QCNPS reports describe the local hydrogeologic regime.

Periodically, the flow patterns on the surface and shallow subsurface are updated based on ongoing measurements.

3. QCNPS will continue to perform routine sampling and radiological analysis of water from selected locations.

4. QCNPS has implemented procedures to identify and report leaks, spills, or other detections with potential radiological significance in a timely manner.

5. QCNPS staff and consulting hydrogeologist assess analytical results

on an ongoing basis to identify adverse trends.

C.

Program Description

1. Sample Collection Sample locations can be found in Table A-1 and Figures A-1 & A-2, Appendix A.

Groundwater Samples of water are collected, managed, transported and analyzed in accordance with approved procedures following regulatory methods. 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, analysis and shipment of samples, as well as in documentation of sampling events. Analytical laboratories are subject to internal quality assurance programs, inter-laboratory cross-check programs, as well as nuclear industry audits. Station personnel review and evaluate all analytical data deliverables after initial review by the contractor.

Analytical data results are reviewed by both station personnel and an independent hydrogeologist for adverse trends or changes to hydrogeologic conditions.

III.

Program Description This section covers those analyses performed by Teledyne Brown Engineering (TBE) on samples collected in 2020.

A.

Sample Analysis This section describes the general analytical methodologies used by TBE and station personnel to analyze the environmental samples for radioactivity for the Quad Cities Nuclear Power Station RGPP in 2020.

Sample analysis and frequency is based upon well location, assessed risk, and site hydrogeology as described in the RGPP.

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

1. Concentrations of gamma emitters in groundwater

2. Concentrations of strontium in groundwater

3. Concentrations of tritium in groundwater

4. Concentration of gross alpha in groundwater

5. Concentrations of Am-241 in groundwater

6. Concentrations of Cm-242 and Cm-243/244 in groundwater

7. Concentrations of Pu-238 and PU-239/240 in groundwater

8. Concentrations of U-234, U-235 and U-238 in groundwater

9. Concentrations of Fe-55 in groundwater

10. Concentrations of Ni-63 in groundwater B.

Data Interpretation The radiological data collected prior to QCNPS becoming operational were used as a baseline with which these operational data were compared. For the purpose of this report, QCNPS 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 specified by federal regulation as a minimum sensitivity value that must be achieved routinely by the analytical parameter.

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 in this report for reporting consistency with the Annual Radiological Environmental Operating Report (AREOR) for samples analyzed by TBE.

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

For groundwater 14 nuclides, 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 and La-140 were reported.

IV.

Results and Discussion A.

Groundwater Results Groundwater samples were collected from on-site wells in accordance with the station RGPP. Analytical results and anomalies are discussed below:

Tritium Samples from all locations were analyzed for tritium activity (Table B-I.1 &

B-II.1 Appendix B). Tritium values ranged from less than LLD of 200 pCi/L to 101,000 pCi/L. Samples obtained near the site boundaries were <200 pCi/L. Based on Quad Cities 2017 GHD Hydrogeological Investigation Report, there is no risk of exposure associated with groundwater ingestion off Station property, there is no risk of exposure associated with groundwater ingestion at the Station and there is no current risk of exposure associated with surface water users off the Station property. The location most representative of potential offsite user of drinking water was

<200 pCi/L.

Strontium Sr-89 was not detected above the Lower Limit of Detection of 10.0 pCi/L.

Sr-90 was detected at one location with concentrations ranging from 7.2 - 11.5 pCi/L. All other sample results were not above the Lower Limit of Detection (LLD) of 1.0 pCi/L. (Table B-I.1 Appendix B)

Gross Alpha (dissolved and suspended)

Gross Alpha analyses in the dissolved and suspended fractions were performed on designated groundwater locations in 2020. Gross Alpha (dissolved) was not detected at concentrations greater than the LLD.

Gross Alpha (suspended) was not detected at concentrations greater than the LLD.

Gamma Emitters Naturally occurring K-40 was detected in three sample locations. The concentrations ranged from 38-70 pCi/L. No gamma-emitting nuclides were detected above the LLD. (Table B-I.2, Appendix B).

Select Transuranics/Hard-To-Detect Select Transuranic/Hard-To-Detect analyses were performed on 1 groundwater location. The analyses included Am-241, Cm-242, Cm-243/244, Pu-238, Pu-239/240, U-234, U-235, U-238, Fe-55 and Ni-63.

U-234 was detected at one location with a concentration of 0.77 pCi/L.

U-238 was detected at one location with a concentration of 0.76 pCi/L.

U-234 and U-238 are commonly found in groundwater at low concentrations due to the naturally-occurring Radium (Uranium) Decay

Series. The concentrations of U-234 and U-238 discussed above are considered to be background and are not the result of station effluents. All other Select Transuranic/Hard-To-Detect nuclides were not detected at concentrations greater than their respective MDCs.

(Table B-I.3 Appendix B).

B.

Summary of Results - Inter-Laboratory Comparison Program Inter-Laboratory Comparison Program results for TBE are presented in the Annual Radiological Environmental Operating Report.

C.

Leaks, Spills, and Releases No leaks, spills or releases were identified during the year.

D.

Trends The March 28, 2018 Radwaste Pipe Vault release was >99% remediated as of December 22, 2020. Overall, groundwater tritium concentrations have been decreasing over time at the Station.

E.

Investigations Currently no investigations are on-going.

F.

Actions Taken

1. Compensatory Actions There have been no station events requiring compensatory actions at the Quad Cities Nuclear Power Station in 2020.

2. Actions to Recover/Reverse Plumes Remediation of the groundwater tritium activity in vicinity of the RW Pipe Vault resumed on March 12, 2020 via pumping from remediation well QC-RW-1 and QC-GP-18 with pump effluent routed to the Discharge Bay for release. Active pumping for remediation was discontinued for remainder of 2020 on December 22, 2020 due to winter weather. Between March 12, 2020 and December 22, 2020, approximately 1.8 million gallons of groundwater was pumped from the vicinity of the RW Pipe Vault for remediation purposes. Quad Cities Station Migration Control Plan (MCP) continues to employ Monitored Natural Attenuation for remediation of legacy H-3 plumes.

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APPENDIX A LOCATION DESIGNATION

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TABLE A-1:

Radiological Groundwater Protection Program - Sampling Locations Quad Cities Nuclear Power Station, 2020 Site Site Type Well Designation Minimum Sample Frequency MW-QC-1 Monitoring Well Source Quarterly MW-QC-2 Monitoring Well Mid-Field Semi-Annual MW-QC-3 Monitoring Well Source Quarterly MW-QC-101I Monitoring Well Idle Not Required MW-QC-101S Monitoring Well Idle Not Required MW-QC-102D Monitoring Well Perimeter Annual MW-QC-102I Monitoring Well Mid-Field Semi-Annual MW-QC-102S Monitoring Well Perimeter Annual MW-QC-103I Monitoring Well Source Quarterly MW-QC-104S Monitoring Well Source Quarterly MW-QC-105I Monitoring Well Source Quarterly MW-QC-106I Monitoring Well Mid-Field Semi-Annual MW-QC-106S Monitoring Well Mid-Field Semi-Annual MW-QC-107I Monitoring Well

Background

Annual MW-QC-108D Monitoring Well Perimeter Annual MW-QC-108I Monitoring Well Mid-Field Semi-Annual MW-QC-108S Monitoring Well Perimeter Annual MW-QC-109I Monitoring Well Mid-Field Semi-Annual MW-QC-109S Monitoring Well Perimeter Annual MW-QC-110I Monitoring Well Idle Not Required MW-QC-111D1 Monitoring Well Idle Not Required MW-QC-111D2 Monitoring Well Idle Not Required MW-QC-111I Monitoring Well Idle Not Required MW-QC-112I Monitoring Well Perimeter Annual MW-QC-113I Monitoring Well Idle Not Required MW-QC-114I Monitoring Well Idle Not Required MW-QC-115S Monitoring Well Idle Not Required MW-QC-116S Monitoring Well Idle Not Required SURFACE WATER #1 Surface Water Idle Not Required SURFACE WATER #2 Surface Water Idle Not Required WELL #1 Production Well Idle Not Required WELL #5 Production Well Idle Not Required WELL #6 LITTLE FISH Production Well Idle Not Required WELL #7 BIG FISH WELL Production Well Mid-Field Semi-Annual WELL #8 FIRE TRAINING WELL Production Well Idle Not Required WELL #9 Dry Cask Storage Production Well

Background

Annual WELL #10 FISH HOUSE WELL Production Well Idle Not Required WELL #11 SPRAY CANAL WELL Production Well Idle Not Required STP SAND POINT WELL Production Well Idle Not Required QC-GP-1 Sentinel Well Source Quarterly QC-GP-2 Sentinel Well Source Quarterly QC-GP-3 Sentinel Well Idle Not Required QC-GP-4 Sentinel Well Source Quarterly QC-GP-5 Sentinel Well Source Quarterly QC-GP-6 Sentinel Well Idle Not Required QC-GP-7 Sentinel Well Idle Not Required QC-GP-8 Sentinel Well Idle Not Required QC-GP-9 Sentinel Well Source Quarterly QC-GP-10 Sentinel Well Source Quarterly QC-GP-11 Sentinel Well Idle Not Required QC-GP-12 Sentinel Well Source Quarterly QC-GP-13 Sentinel Well Idle Not Required QC-GP-14 Sentinel Well Mid-Field Semi-Annual QC-GP-15 Sentinel Well Source Quarterly QC-GP-16 Sentinel Well Idle Not Required QC-GP-17 Sentinel Well Source Quarterly QC-GP-18 Sentinel Well Source Quarterly QC-RW-1 Remediation Well Mid-Field Semi-Annual Note: Idle designated wells are not required to be sampled as part of the RGPP A-1

FIGURE A-1 Sampling Locations Near the Site Boundary of the Quad Cities Nuclear Power Station, 2020 A-2 I

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QUAD CITIES GENERATING STATION Cordova, Illinois

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APPENDIX B DATA TABLES

Intentionally left blank

TABLE B-I.1 COLLECTION SITE DATE Sr-89 Sr-90 MW-QC-1 03/09/20 300 +/- 121

< 5.0

< 0.7

< 6.5

< 1.8 MW-QC-1 08/11/20 344 +/- 128 MW-QC-1 10/28/20 222 +/- 120 MW-QC-2 03/10/20

< 173 MW-QC-2 08/11/20

< 179 MW-QC-3 03/09/20 980 +/- 163

< 5.7

< 0.9

< 0.6

< 0.9 MW-QC-3 06/03/20 823 +/- 164 MW-QC-3 08/11/20

< 181 MW-QC-3 10/28/20 881 +/- 160 MW-QC-102D 03/10/20

< 183 MW-QC-102I 03/10/20

< 181 MW-QC-102I 08/12/20

< 183 MW-QC-102S 03/10/20

< 182 MW-QC-103I 03/10/20

< 178

< 6.1

< 0.8

< 0.7

< 0.9 MW-QC-103I 06/03/20

< 192 MW-QC-103I 08/11/20

< 179 MW-QC-103I 10/28/20

< 181 MW-QC-104S 03/10/20

< 179

< 4.2

< 0.7

< 0.9

< 0.9 MW-QC-104S 08/12/20

< 182 MW-QC-104S 10/28/20 404 +/- 128 MW-QC-105I 03/10/20 685 +/- 143

< 6.0

< 0.8

< 0.7

< 1.1 MW-QC-105I 08/12/20 332 +/- 126 MW-QC-105I 10/28/20 1140 +/- 183 MW-QC-106I 03/10/20

< 177 MW-QC-106I 08/11/20

< 188 MW-QC-106S 03/10/20

< 183 MW-QC-106S 08/11/20

< 179 MW-QC-107I 03/10/20

< 175 MW-QC-108D 03/09/20

< 194 MW-QC-108I 03/09/20

< 198 MW-QC-108I 08/11/20

< 187 MW-QC-108S 03/09/20

< 186 MW-QC-109I 03/09/20

< 174 MW-QC-109I 08/11/20

< 181 MW-QC-109S 03/09/20

< 200 MW-QC-112I 03/09/20

< 174 QC-GP-1 03/11/20 1080 +/- 176

< 6.5

< 0.6

< 0.9

< 0.8 QC-GP-1 06/03/20 656 +/- 147 QC-GP-1 08/13/20 1550 +/- 219 QC-GP-1 10/28/20 1520 +/- 219 QC-GP-2 03/12/20 305 +/- 122

< 6.6

< 0.7

< 0.4

< 0.8 QC-GP-2 08/12/20 290 +/- 136 QC-GP-2 10/29/20

< 182 QC-GP-4 03/12/20 8890 +/- 943

< 5.2

< 0.7

< 1.8

< 0.8 QC-GP-4 06/03/20 7100 +/- 763 QC-GP-4 08/13/20 10400 +/- 1090 H-3 Gr-A CONCENTRATIONS OF TRITIUM, STRONTIUM AND GROSS ALPHA IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF QUAD CITIES NUCLEAR POWER STATION, 2020 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA (Sus)

Gr-A (Dis)

B-1

TABLE B-I.1 COLLECTION SITE DATE Sr-89 Sr-90 H-3 Gr-A CONCENTRATIONS OF TRITIUM, STRONTIUM AND GROSS ALPHA IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF QUAD CITIES NUCLEAR POWER STATION, 2020 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA (Sus)

Gr-A (Dis)

QC-GP-4 10/28/20 8000 +/- 853 QC-GP-5 03/11/20 200 +/- 117

< 7.7 11.5 +/- 1

< 1.1

< 0.8 QC-GP-5 06/03/20

< 194

< 8.7 7.2 +/- 1 QC-GP-5 08/13/20 243 +/- 130

< 7.1 10.8 +/- 1 QC-GP-5 10/29/20 226 +/- 123

< 3.5 9.0 +/- 1 QC-GP-9 03/12/20 2750 +/- 335

< 4.4

< 0.7

< 0.8

< 0.8 QC-GP-9 06/03/20 2000 +/- 261 QC-GP-9 08/14/20 2840 +/- 344 QC-GP-9 10/28/20 1770 +/- 243 QC-GP-10 03/12/20

< 175

< 4.1

< 0.9

< 1.0

< 0.8 QC-GP-10 08/14/20

< 184 QC-GP-10 10/29/20

< 183 QC-GP-12 03/12/20 720 +/- 144

< 5.9

< 0.8

< 0.6

< 0.8 QC-GP-12 08/13/20 315 +/- 133 QC-GP-12 10/29/20 239 +/- 124 QC-GP-14 03/12/20

< 179 QC-GP-14 08/14/20 267 +/- 131 QC-GP-15 03/11/20

< 181

< 4.1

< 0.8

< 1.4

< 0.8 QC-GP-15 08/12/20

< 182 QC-GP-15 10/29/20

< 184 QC-GP-17 03/12/20 768 +/- 149

< 5.4

< 0.9

< 0.8

< 0.8 QC-GP-17 08/13/20 1110 +/- 183 QC-GP-17 10/29/20 1780 +/- 245 QC-GP-18 03/09/20 19800 +/- 2030

< 5.7

< 0.8

< 1.0

< 0.8 QC-GP-18 06/01/20 25900 +/- 2650 QC-GP-18 08/13/20 19200 +/- 1970 QC-GP-18 10/28/20 35400 +/- 3590 QC-RW-1 03/09/20 49900 +/- 5030 QC-RW-1 06/01/20 50300 +/- 5080 QC-RW-1 08/13/20 50300 +/- 5080 QC-RW-1 10/28/20 59700 +/- 5110 WELL 7 BIG FISH 03/09/20

< 179 WELL 7 BIG FISH 08/11/20

< 183 WELL #9 DRY 03/13/20

< 177 CASK STORAGE B-2

TABLE B-I.2 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-QC-1 03/09/20

< 14 70 +/- 25

< 2

< 4

< 2

< 4

< 2

< 3

< 4

< 2

< 9

< 3 MW-QC-2 03/10/20

< 12

< 1

< 3

< 1

< 3

< 1

< 2

< 3

< 1

< 8

< 3 MW-QC-3 03/09/20

< 18

< 20

< 2

< 4

< 2

< 4

< 2

< 3

< 4

< 2

< 10

< 4 MW-QC-102D 03/10/20

< 16

< 21

< 2

< 4

< 2

< 4

< 2

< 3

< 4

< 2

< 10

< 4 MW-QC-102I 03/10/20

< 18

< 2

< 4

< 2

< 4

< 2

< 4

< 2

< 10

< 3 MW-QC-102S 03/10/20

< 14

< 27

< 2

< 4

< 2

< 3

< 2

< 3

< 4

< 2

< 9

< 4 MW-QC-103I 03/10/20

< 15

< 16

< 2

< 4

< 2

< 3

< 2

< 3

< 4

< 2

< 10

< 3 MW-QC-104S 03/10/20

< 18

< 2

< 4

< 2

< 4

< 2

< 4

< 2

< 11

< 3 MW-QC-105I 03/10/20

< 15

< 27

< 2

< 4

< 2

< 4

< 2

< 3

< 4

< 2

< 10

< 3 MW-QC-106I 03/10/20

< 14

< 15

< 2

< 3

< 2

< 3

< 2

< 3

< 2

< 9

< 3 MW-QC-106S 03/10/20

< 15

< 17

< 2

< 4

< 2

< 3

< 2

< 3

< 4

< 2

< 9

< 3 MW-QC-107I 03/10/20

< 17

< 38

< 2

< 4

< 2

< 4

< 2

< 3

< 4

< 2

< 11

< 3 MW-QC-108D 03/09/20

< 16

< 33

< 2

< 4

< 2

< 3

< 2

< 3

< 4

< 2

< 10

< 4 MW-QC-108I 03/09/20

< 17

< 32

< 2

< 4

< 2

< 4

< 2

< 3

< 4

< 2

< 10

< 3 MW-QC-108S 03/09/20

< 17 38 +/- 25

< 2

< 4

< 2

< 4

< 2

< 3

< 4

< 2

< 10

< 3 MW-QC-109I 03/09/20

< 16

< 28

< 2

< 4

< 2

< 4

< 2

< 3

< 4

< 2

< 10

< 4 MW-QC-109S 03/09/20

< 17

< 16

< 2

< 4

< 2

< 3

< 2

< 3

< 4

< 2

< 11

< 3 MW-QC-112I 03/09/20

< 15

< 28

< 2

< 4

< 2

< 3

< 2

< 3

< 4

< 2

< 10

< 3 QC-GP-1 03/11/20

< 17

< 37

< 2

< 4

< 2

< 3

< 2

< 3

< 4

< 2

< 10

< 3 QC-GP-2 03/12/20

< 16

< 2

< 4

< 2

< 4

< 2

< 3

< 4

< 2

< 11

< 4 QC-GP-4 03/12/20

< 17

< 16

< 2

< 4

< 2

< 4

< 2

< 3

< 5

< 2

< 11

< 3 QC-GP-5 03/11/20

< 14 65 +/- 20

< 1

< 2

< 3

< 2

< 3

< 2

< 3

< 4

< 2

< 1

< 10

< 3 QC-GP-9 03/12/20

< 14

< 36

< 1

< 3

< 1

< 3

< 2

< 3

< 4

< 2

< 10

< 3 QC-GP-10 03/12/20

< 17

< 14

< 2

< 4

< 2

< 4

< 2

< 3

< 5

< 2

< 12

< 3 QC-GP-12 03/12/20

< 16

< 29

< 2

< 4

< 2

< 3

< 2

< 3

< 4

< 2

< 11

< 4 QC-GP-14 03/12/20

< 15

< 29

< 2

< 4

< 1

< 3

< 2

< 3

< 4

< 2

< 10

< 4 QC-GP-15 03/11/20

< 15

< 2

< 4

< 2

< 3

< 2

< 3

< 5

< 2

< 10

< 3 QC-GP-17 03/12/20

< 16

< 34

< 2

< 4

< 2

< 3

< 2

< 3

< 4

< 2

< 11

< 4 QC-GP-18 03/09/20

< 16

< 2

< 4

< 2

< 3

< 2

< 3

< 5

< 2

< 11

< 3 QC-RW-1 03/09/20

< 14

< 23

< 1

< 3

< 1

< 3

< 2

< 3

< 4

< 2

< 9

< 3 WELL 7 BIG FISH 03/09/20

< 15

< 30

< 2

< 4

< 2

< 3

< 2

< 3

< 4

< 2

< 10

< 3 WELL #9 DRY 03/13/20

< 14

< 2

< 3

< 2

< 3

< 2

< 3

< 4

< 2

< 10

< 3 CASK STORAGE CONCENTRATIONS OF GAMMA EMITTERS IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF QUAD CITIES NUCLEAR POWER STATION, 2020 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA B-3

TABLE B-I.3 COLLECTION SITE DATE Am-241 Cm-242 Cm-243/244 Pu-238 Pu-239/240 U-235 Fe-55 QC-GP-18 03/09/20

< 0.17

< 0.07

< 0.10

< 0.13

< 0.12 0.77 +/- 0.25

< 0.05 0.76 +/- 0.25

< 94

< 4.7 CONCENTRATIONS OF HARD-TO-DETECTS IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF QUAD CITIES NUCLEAR POWER STATION, 2020 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA U-234 U-238 Ni-63 B-4

TABLE B-II.1 COLLECTION SITE DATE ACTIVITY AQUIFER QC-GP-18 03/09/20 17,100 Sentinel Well QC-GP-18 03/13/20 9,150 Sentinel Well QC-GP-18 03/16/20 25,400 Sentinel Well QC-GP-18 03/23/20 21,100 Sentinel Well QC-GP-18 03/30/20 24,600 Sentinel Well QC-GP-18 04/06/20 27,300 Sentinel Well QC-GP-18 04/13/20 34,200 Sentinel Well QC-GP-18 04/20/20 42,900 Sentinel Well QC-GP-18 05/04/20 50,200 Sentinel Well QC-GP-18 05/11/20 44,200 Sentinel Well QC-GP-18 05/18/20 34,700 Sentinel Well QC-GP-18 05/26/20 29,300 Sentinel Well QC-GP-18 06/01/20 26,700 Sentinel Well QC-GP-18 06/08/20 23,400 Sentinel Well QC-GP-18 06/15/20 24,900 Sentinel Well QC-GP-18 06/22/20 24,800 Sentinel Well QC-GP-18 06/29/20 21,900 Sentinel Well QC-GP-18 07/06/20 22,500 Sentinel Well QC-GP-18 07/13/20 20,300 Sentinel Well QC-GP-18 07/20/20 19,000 Sentinel Well QC-GP-18 07/27/20 19,200 Sentinel Well QC-GP-18 08/03/20 18,300 Sentinel Well QC-GP-18 08/13/20 20,000 Sentinel Well QC-GP-18 08/24/20 22,700 Sentinel Well QC-GP-18 09/08/20 25,000 Sentinel Well QC-GP-18 09/21/20 26,400 Sentinel Well QC-GP-18 10/05/20 31,400 Sentinel Well QC-GP-18 10/19/20 36,100 Sentinel Well QC-GP-18 10/28/20 35,200 Sentinel Well QC-GP-18 11/02/20 38,600 Sentinel Well QC-GP-18 11/17/20 15,900 Sentinel Well QC-GP-18 11/30/20 2,020 Sentinel Well QC-GP-18 12/15/20

< 2000 Sentinel Well QC-GP-18 12/21/20

< 2000 Sentinel Well QC-RW-1 03/09/20 50,500 Remediation Well QC-RW-1 03/13/20 56,500 Remediation Well QC-RW-1 03/16/20 101,000 Remediation Well QC-RW-1 03/23/20 66,400 Remediation Well QC-RW-1 03/30/20 41,200 Remediation Well QC-RW-1 04/06/20 41,500 Remediation Well QC-RW-1 04/13/20 44,500 Remediation Well QC-RW-1 04/20/20 40,300 Remediation Well QC-RW-1 05/04/20 71,200 Remediation Well QC-RW-1 05/11/20 51,100 Remediation Well QC-RW-1 05/18/20 48,100 Remediation Well QC-RW-1 05/26/20 44,300 Remediation Well QC-RW-1 06/01/20 49,500 Remediation Well QC-RW-1 06/08/20 65,800 Remediation Well QC-RW-1 06/15/20 62,600 Remediation Well CONCENTRATIONS OF TRITIUM IN GROUNDWATER SAMPLES COLLECTED AND ANALYZED BY QUAD CITIES STATION PERSONNEL, 2020 RESULTS IN UNITS OF PCI/LITER B-5

TABLE B-II.1 COLLECTION SITE DATE ACTIVITY AQUIFER CONCENTRATIONS OF TRITIUM IN GROUNDWATER SAMPLES COLLECTED AND ANALYZED BY QUAD CITIES STATION PERSONNEL, 2020 RESULTS IN UNITS OF PCI/LITER QC-RW-1 06/22/20 62,100 Remediation Well QC-RW-1 06/29/20 58,900 Remediation Well QC-RW-1 07/06/20 60,100 Remediation Well QC-RW-1 07/13/20 55,000 Remediation Well QC-RW-1 07/20/20 50,600 Remediation Well QC-RW-1 07/27/20 47,900 Remediation Well QC-RW-1 08/03/20 48,100 Remediation Well QC-RW-1 08/13/20 49,900 Remediation Well QC-RW-1 08/24/20 52,700 Remediation Well QC-RW-1 09/08/20 48,600 Remediation Well QC-RW-1 09/21/20 54,100 Remediation Well QC-RW-1 10/05/20 58,400 Remediation Well QC-RW-1 10/19/20 55,900 Remediation Well QC-RW-1 10/28/20 58,800 Remediation Well QC-RW-1 11/02/20 60,600 Remediation Well QC-RW-1 11/17/20 64,700 Remediation Well QC-RW-1 11/30/20 49,000 Remediation Well QC-RW-1 12/15/20 48,600 Remediation Well QC-RW-1 12/21/20 48,800 Remediation Well Well #1 05/21/20

<200 Production Well Well #1 10/23/20

<200 Production Well Well #5 05/21/20

<200 Production Well Well #5 10/23/20

<200 Production Well B-6

SVP-21-028, Annual Radiological Environmental Operating Report

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SVP-21-028, Annual Radiological Environmental Operating Report

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