Text

Annual Radiological Environmental Operating Report
	ML14135A214
Person / Time
Site:	LaSalle
Issue date:	05/15/2014
From:	Karaba P; Exelon Generation Co
To:	; Document Control Desk, Office of Nuclear Reactor Regulation
References
	RA14-016
	Download: ML14135A214 (183)
	v • d • e

Adwmw 2601 North 21st Road Marseilles, IL 61341 Exeton Generation 815 415 2000 Telephone www.exeloncorp.com 10 CFR 50 Appendix I RA14-016 May 15, 2014 U. S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, D.C. 20555 LaSalle County Station, Units 1 and 2 Facility Operating License Nos. NPF-11 and NPF-18 NRC Docket Nos. 50-373 and 50-374

Subject:

2013 Annual Radiological Environmental Operating Report Enclosed is the Exelon Generation Company, LLC, LaSalle County Station 2013 Annual Radiological Environmental Operating Report, submitted in accordance with Technical Specification 5.6.2, "Annual Radiological Environmental Operating Report." This report contains the results of the Radiological Environmental and Meteorological Monitoring Programs. This report is enclosed as an attachment.

In addition, this attachment contains the results of groundwater monitoring conducted in accordance with Exelon's Radiological Groundwater Protection Program, which is a voluntary program implemented in 2006. This information is being reported in accordance with a nuclear industry initiative.

Should you have any questions concerning this letter, please contact Mr. Guy V. Ford, Regulatory Assurance Manager, at (815) 415-2800.

Respectfully, Peter J. Karaba Site Vice President LaSalle County Station

Docket No: 50-373 50-374 LASALLE COUNTY STATION UNITS 1 and 2 Annual Radiological Environmental Operating Report 1 January Through 31 December 2013 Prepared By Teledyne Brown Engineering Environmental Services LaSalle County Station Marseilles, IL 61341 May 2014 Page 1 of 182

Table Of Contents I. Summary and Conclusions .............................................................................................. 1 II. Introduction ..................................................................................................................... 2 A. Objectives of the REMP ...................................................................................... 2 B. Implementation of the Objectives ........................................................................ 2 III. Program Description ...................................................................................................... 2 A. Sample Collection ............................................................................................... 2 B. Sample Analysis .................................................................................................. 5 C. Data Interpretation .............................................................................................. 5 D. Program Exceptions ............................................................................................ 6 E. Program Changes ............................................................................................... 7 IV. Results and Discussion ................................................................................................. 8 A. Aquatic Environment ........................................................................................... 8

1. Surface Water........................................................................................... 8

2. Ground/Well Water ................................................................................... 8

3. Fish ........................................................................................................... 9

4. Sediment................................................................................................... 9 B. Atmospheric Environment ................................................................................. 10

1. Airborne .................................................................................................. 10

a. Air Particulates............................................................................. 10

b. Airborne Iodine ............................................................................ 11

2. Terrestrial ................................................................................................ 11

a. Milk............................................................................................... 11

b. Food Products ............................................................................. 11 C. Ambient Gamma Radiation ............................................................................... 12 D. Land Use Survey............................................................................................... 12 E. Errata Data ........................................................................................................ 13 F. Summary of Results - Inter-laboratory Comparison Program .......................... 14 i

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Appendices Appendix A Radiological Environmental Monitoring Report Annual Summary Tables Table A-1 Radiological Environmental Monitoring Program Annual Summary for the LaSalle County Station, 2013 Appendix B Location Designation, Distance & Direction, and Sample Collection &

Analytical Methods Tables Table B-1 Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, LaSalle County Station, 2013 Table B-2 Radiological Environmental Monitoring Program - Summary of Sample Collection and Analytical Methods, LaSalle County Station, 2013 Figures Figure B-1 Inner Ring OSLD Locations of the LaSalle County Station, 2013 Figure B-2 Outer Ring OSLD Locations and Fixed Air Sampling Locations of the LaSalle County Station, 2013 Figure B-3 Ingestion and Waterborne Exposure Pathway Sample Locations of the LaSalle County Station, 2013 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 LaSalle County Station, 2013.

Table C-I.2 Concentrations of Tritium in Surface Water Samples Collected in the Vicinity of LaSalle County Station, 2013.

Table C-I.3 Concentrations of Gamma Emitters in Surface Water Samples Collected in the Vicinity of LaSalle County Station, 2013.

Table C-II.1 Concentrations of Tritium in Ground/Well Water Samples Collected in the Vicinity of LaSalle County Station, 2013 Table C-II.2 Concentrations of Gamma Emitters in Ground/Well Water Samples Collected in the Vicinity of LaSalle County Station, 2013.

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Table C-III.1 Concentrations of Gamma Emitters in Fish Samples Collected in the Vicinity of LaSalle County Station, 2013.

Table C-IV.1 Concentrations of Gamma Emitters in Sediment Samples Collected in the Vicinity of LaSalle County Station, 2013.

Table C-V.1 Concentrations of Gross Beta in Air Particulate Samples Collected in the Vicinity of LaSalle County Station, 2013.

Table C-V.2 Monthly and Yearly Mean Values of Gross Beta Concentrations (E-3 pCi/cu meter) in Air Particulate Samples Collected in the Vicinity of LaSalle County Station, 2013.

Table C-V.3 Concentrations of Gamma Emitters in Air Particulate Samples Collected in the Vicinity of LaSalle County Station, 2013.

Table C-VI.1 Concentrations of I-131 in Air Iodine Samples Collected in the Vicinity of LaSalle County Station, 2013.

Table C-VII.1 Concentrations of I-131 in Milk Samples Collected in the Vicinity of LaSalle County Station, 2013.

Table C-VII.2 Concentrations of Gamma Emitters in Milk Samples Collected in the Vicinity of LaSalle County Station, 2013.

Table C-VIII.1 Concentrations of Gamma Emitters in Food Product Samples Collected in the Vicinity of LaSalle County Station, 2013.

Table C-IX.1 Quarterly OSLD Results for LaSalle County Station, 2013.

Table C-IX.2 Mean Quarterly OSLD Results for the Inner Ring, Outer Ring, Other and Control Locations for LaSalle County Station, 2013.

Table C-IX.3 Summary of the Ambient Dosimetry Program for LaSalle County Station, 2013.

Figures Figure C-1 Surface Water - Gross Beta - Stations L-21 (C) and L-40 Collected in the Vicinity of LSCS, 2005 - 2013.

Figure C-2 Surface Water - Tritium - Stations L-21 (C) and L-40 Collected in the Vicinity of LSCS, 2005 - 2013.

Figure C-3 Air Particulate - Gross Beta - Stations L-01 and L-03 Collected in the Vicinity of LSCS, 2005 - 2013.

Figure C-4 Air Particulate - Gross Beta - Stations L-05 and L-06 Collected in the Vicinity of LSCS, 2005 - 2013.

Figure C-5 Air Particulate - Gross Beta - Station L-10 (C) Collected in the Vicinity of LSCS, 2005 - 2013.

Figure C-6 Air Particulate - Gross Beta - Station L-04 and L-07 Collected in the Vicinity of LSCS, 2005 - 2013.

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Figure C-7 Air Particulate - Gross Beta - Station L-08 and L-11 Collected in the Vicinity of LSCS, 2005 - 2013.

Appendix D Inter-Laboratory Comparison Program Tables Table D-1 Analytics Environmental Radioactivity Cross Check Program Teledyne Brown Engineering, 2013 Table D-2 ERA Environmental Radioactivity Cross Check Program Teledyne Brown Engineering, 2013 Table D-3 DOEs Mixed Analyte Performance Evaluation Program (MAPEP)

Teledyne Brown Engineering, 2013 Table D-4 ERA Statistical Summary Proficiency Testing Program Environmental, Inc., 2013 Table D-5 DOEs Mixed Analyte Performance Evaluation Program (MAPEP)

Environmental, Inc., 2013 Appendix E Effluent Data Appendix F Meteorological Data Appendix G Errata Data Appendix H Annual Radiological Groundwater Protection Program Report (ARGPPR) iv Page 5 of 182

I. Summary and Conclusions This report on the Radiological Environmental Monitoring Program conducted for the LaSalle County Station (LSCS) by Exelon covers the period 1 January 2013 through 31 December 2013. During that time period, 1,453 analyses were performed on 1,353 samples. In assessing all the data gathered for this report and comparing these results with preoperational data, it was concluded that the operation of LSCS had no adverse radiological impact on the environment.

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

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

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

High sensitivity I-131 analyses were performed on weekly air samples. All results were less than the minimum detectable activity for I-131.

Cow milk samples were analyzed for concentrations of I-131 and gamma emitting nuclides. All I-131 results were below the minimum detectable activity.

Concentrations of naturally occurring K-40 were consistent with those detected in previous years. No fission or activation products were found.

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 the first quarter of 2012, Exelon changed the type of dosimetry used for the Radiological Environmental Monitoring Program (REMP). Optically Stimulated Luminescent Dosimetry were deployed and Thermo-luminescent Dosimetry (TLD) were discontinued. This change may result in a step change in readings, up or down, depending on site characteristics. 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).

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II. Introduction The LaSalle County Station (LSCS), consists of two boiling water reactors, each rated for 3,546 MWt. Both units are owned and operated by Exelon Corporation and are located in LaSalle County, Illinois. Unit 1 went critical on 16 March 1982. Unit 2 went critical on 02 December 1983. The site is located in northern Illinois, approximately 75 miles southwest of Chicago, Illinois.

A Radiological Environmental Monitoring Program (REMP) for LSCS was initiated in 1982 (the preoperational period for most media covers the periods 1 January 1979 through 26 December 1981 and was summarized in a separate report.). This report covers those analyses performed by Teledyne Brown Engineering (TBE) and Landauer on samples collected during the period 1 January 2013 through 31 December 2013.

A. Objective 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.

III. Program Description A. Sample Collection Samples for the LSCS REMP were collected for Exelon Nuclear by Environmental Inc. (Midwest Labs). This section describes the general Page 7 of 182

collection methods used by Environmental Inc. (Midwest Labs) to obtain environmental samples for the LSCS REMP in 2013. Sample locations and descriptions can be found in Tables B-1 and B-2, and Figures B-1 through B-4, Appendix B.

Aquatic Environment The aquatic environment was evaluated by performing radiological analyses on samples of surface water, ground/well water, fish, and sediment. Two gallon water samples were collected weekly from two surface water locations (L-21 and L-40) and composited for monthly and quarterly required analyses. Control location was L-21. Two ground/well water locations (L-27 and L-28) were also grab sampled quarterly. All samples were collected via grab sample. The samples were then transferred to new unused plastic containers. Both the grab container and the sample containers were rinsed with source water prior to actual sample collection. Fish samples were collected semiannually at three locations, L-34, L-35 and L-36 (Control). Sediment samples composed of recently deposited substrate were collected at three locations semiannually, L-21 (Control), L-40 and L-41.

Atmospheric Environment The atmospheric environment was evaluated by performing radiological analyses on samples of airborne particulate and iodine. Airborne particulate and iodine samples were collected and analyzed weekly at nine locations (L-01, L-03, L-04, L-05, L-06, L-07, L-08, L-10 and L-11).

The control location was L-10. Airborne particulate and iodine samples were obtained at each location, using a vacuum pump to pull air through a glass fiber particulate filter and iodine cartridge. The pumps were run continuously and sampled air at the rate of approximately one cubic foot per minute. The particulate filters and iodine cartridges 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. Samples were collected biweekly at one milk location (L-42) from May through October, and monthly from November through April. The control location was L-42. All samples were collected in new unused two gallon plastic bottles from the bulk tank at each location, preserved with sodium bisulfite, and shipped promptly to the laboratory.

Food products were collected annually in September at five locations (L-Quad C, L-Quad 1, L-Quad 2, L-Quad 3 and L-Quad 4). The control Page 8 of 182

location was L-Quad C. Various types of samples were collected and placed in new unused plastic bags, and sent to the laboratory for analysis.

Ambient Gamma Radiation Beginning in the first quarter of 2012, Exelon changed the type of dosimetry used for the Radiological Environmental Monitoring Program (REMP). Optically Stimulated Luminescent Dosimetry (OSLD) were deployed and Thermo-luminescent Dosimetry (TLD) were discontinued.

This change may cause step changes in readings, up or down, depending on site characteristics. However, 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 OSLDs were exchanged quarterly and sent to Landauer for analysis. The OSLD locations were placed on and around the LSCS site as follows:

An inner ring consisting of 16 locations (L-101, L-102, L-103, L-104, L-105, L-106, L-107, L-108, L-109, L-110, L-111B, L-112, L-113A, L-114, L-115 and L-116) near and within the site perimeter representing fence post doses (i.e., at locations where the doses will be potentially greater than maximum annual off-site doses) from LSCS release.

An outer ring consisting of 16 locations (L-201, L-202, L-203, L-204, L-205, L-206, L-207, L-208, L-209, L-210, L-211, L-212, L-213, L-214, L-215 and L-216) extending to approximately 5 miles from the site designed to measure possible exposures to nearby population.

An other set consisting of eight locations (L-01, L-03, L-04, L-05, L-06, L-07, L-08 and L-11).

The balance of one location (L-10) representing the control area.

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 1/2 degree sectors around the site, where estimated annual dose from LSCS, if any, would be most significant;

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

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4. And near the closest dwelling to the vents in the prevailing downwind direction.

(Two OSLDs were placed at each location approximately six feet above ground level.)

B. Sample Analysis This section describes the general analytical methodologies used by TBE and Environmental Inc. (Midwest Labs) to analyze the environmental samples for radioactivity for the LSCS REMP in 2013. The analytical procedures used by the laboratories 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/well and surface water, air particulates, milk, fish, sediment and vegetation.

3. Concentrations of tritium in ground/well and surface water.

4. Concentrations of I-131 in air and milk.

5. Ambient gamma radiation levels at various site environs.

C. Data Interpretation The radiological and direct radiation data collected prior to LaSalle County Station becoming operational were used as a baseline with which these operational data were compared. For the purpose of this report, LaSalle County 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 a before the fact (a priori) estimate of a system (including instrumentation, Page 10 of 182

procedure and sample type) and not as an after the fact (a posteriori) criteria for the presence of activity. All analyses were designed to achieve the required LSCS detection capabilities for environmental sample analysis.

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

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

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

For surface water and food product 12 nuclides, Mn-54, Co-58, Fe-59, Co-60, Zn-65, Zr-95, Nb-95, I-131, Cs-134, Cs-137, Ba-140 and La-140 were reported.

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

Means and standard deviations of the results were calculated. The standard deviations represent the variability of measured results for different samples rather than single analysis uncertainty.

D. Program Exceptions For 2013, the LSCS REMP had a sample recovery rate in excess of 99%.

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

Table D-1 LISTING OF SAMPLE ANOMALIES Sample Location Collection Reason Type Code Date A/I L-03 04/25/13 Low reading of 75.6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months due to pump malfunction; collector replaced pump.

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Table D-1 LISTING OF SAMPLE ANOMALIES (continued)

Sample Location Collection Reason Type Code Date A/I L-01 05/30/13 Low reading of 128.8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months due to blown fuse; possibly storm related. Collector replaced fuse.

A/I L-05 07/11/13 Low reading of 96.5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months due to power outages related to the repair of a broken pole on the local power distribution system.

A/I L-06 07/11/13 Low reading of 160.5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months due to power outages related to the repair of a broken pole on the local power distribution system.

Table D-2 LISTING OF MISSED SAMPLES Sample Location Collection Reason Type Code Date OSLD L115-2 03/27/13 OSLD found missing in field during quarterly exchange; collector placed new nd 2 quarter OSLD.

OSLD L214-4 06/27/13 OSLD found missing during quarterly rd exchange; collector placed new 3 quarter OSLD.

OSLD L208-1 12/26/13 OSLD found missing during quarterly exchange; collector placed new 1st quarter OSLD.

Each program exception was reviewed to understand the causes of the program exception. Occasional equipment breakdowns and power outages were unavoidable.

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 changes to the program in 2013.

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IV. Results and Discussion A. Aquatic Environment

1. Surface Water Samples were taken weekly and composited monthly at two locations (L-21 and L-40). Of these locations only L-40 located downstream, could be affected by LaSalles 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 was detected in all 24 samples with a range of 4.7 to 10.5 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). Tritium was detected in four of eight samples. The concentrations ranged from 528 to 1,790 pCi/l. Concentrations detected were consistent with those detected in previous years through the first three quarters. Fourth quarter control and indicator sample results were both slightly higher than previous years. However, because both control and indicator results were statistically equivalent, the elevated results were not attributed to LaSalle effluent releases (Figure C-2, Appendix C). The 2000 pCi/L OCDM and contractually required 200 pCi/L LLDs were met.

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

2. Ground/Well Water Quarterly grab samples were collected at two locations (L-27 and L-28). Wells 4, 5 and 6 are associated with L-28. L-27 and L-28 well 6 could be affected by LaSalles effluent releases. The following analyses were performed:

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Tritium Quarterly grab samples from the locations were analyzed for tritium activity (Table C-II.1, Appendix C). No tritium was detected and 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 were detected, and all required LLDs were met.

3. Fish Fish samples were collected at three locations (L-34, L-35 and L-36) semiannually. Locations L-34 and L-35 could be affected by LaSalles effluent releases. The following analysis was performed:

Gamma Spectrometry The edible portion of fish samples from both locations was analyzed for gamma emitting nuclides (Table C-III.1, Appendix C).

Naturally occurring K-40 was found at all stations and ranged from 2,720 to 5,090 pCi/kg wet. No fission or activation products were found.

4. Sediment Aquatic sediment samples were collected at three locations (L-21, L-40 and L-41) semiannually. Locations L-40 and L-41, located downstream, could be affected by LaSalles effluent releases. The following analysis was performed:

Gamma Spectrometry Sediment samples from both locations were analyzed for gamma emitting nuclides (Table C-IV.1, Appendix C). Nuclides detected were naturally occurring K-40. Potassium-40 was found at all stations and ranged from 13,100 to 21,700 pCi/kg dry. Cesium-137 was detected in one sample at a concentration of 122 pCi/L. No LaSalle fission or activation products were found.

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B. Atmospheric Environment

1. Airborne

a. Air Particulates Continuous air particulate samples were collected from nine locations on a weekly basis. The nine locations were separated into four groups: Group I (onsite) represents locations within the LSCS site boundary (L-03 and L-05),

Group II (near site) represents the locations near the LSCS site (L-01 and L-06), Group III (far field) represents the control location at an intermediate distance from LSCS (L-04, L-07, L-08 and L-11) and Group IV (Control) represents the control location at a remote distance (L-10).

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).

Detectable gross beta activity was observed at all locations.

Comparison of results among the four groups aid in determining the effects, if any, resulting from the operation of LSCS. The results from the OnSite locations (Group I) ranged from 8 to 52 E-3 pCi/m3 with a mean of 20 E-3 pCi/m3. The results from the near site location (Group II) 3 ranged from 8 to 54 E-3 pCi/m with a mean of 21 E-3 3

pCi/m . The results from the far field locations (Group III) ranged from 5 to 57 E-3 pCi/m3 with a mean of 20 E-3 3

pCi/m . The results from the Control location (Group IV) ranged from 7 to 52 E-3 pCi/m3 with a mean of 20 E-3 pCi/m3. Comparison of the 2013 air particulate data with previous years data indicate no effects from the operation of LSCS (Figures C-3 through C-7, Appendix C). In addition, comparisons of the weekly mean values for 2013 indicate no notable differences among the four groups.

Gamma Spectrometry Weekly samples were composited quarterly and analyzed for gamma emitting nuclides (Table C-V.3, Appendix C).

Naturally occurring Be-7 due to cosmic ray activity was detected in all samples. These values ranged from 75 to 178 E-3 pCi/m3. Naturally occurring K-40 was not detected in any samples. All other nuclides were less than the MDC.

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b. Airborne Iodine Continuous air samples were collected from nine locations (L-01, L-03, L-04, L-05, L-06, L-07, L-08, L-10 and L-11) and analyzed weekly for I-131 (Table C-VI.1, Appendix C). No I-131 was detected. All required LLDs were met.

2. Terrestrial

a. Milk Samples were collected from one location (L-42) 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 nuclides were detected, and all required LLDs were met.

Gamma Spectrometry Each milk sample was analyzed for concentrations of gamma emitting nuclides (Table C-VII.2, Appendix C).

Naturally occurring K-40 activity was found in all samples and ranged from 1,140 to 1,470 pCi/l. No other nuclides were detected, and all required LLDs were met.

b. Food Products Food product samples were collected at five locations (L-Quad C, L-Quad 1, L-Quad 2, L-Quad 3 and L-Quad 4) when available. Four locations, (L-Quad 1, L-Quad 2, L-Quad 3 and L-Quad 4) could be affected by LaSalles 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 were detected, and all required LLDs were met.

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C. Ambient Gamma Radiation Ambient gamma radiation levels were measured utilizing Optically Stimulated Luminescence Dosimeters (OSLD). Forty-one OSLD locations were established around the site. Results of OSLD measurements are listed in Tables C-IX.1 to C-IX.3, Appendix C.

All OSLD measurements were below 30 mrem/quarter, with a range of 16.1 to 27.4 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 the Control Location L-10 were comparable.

D. Land Use Survey A Land Use Survey conducted during the August 2013 growing season around the LaSalle County Station (LSCS) was performed by Environmental Inc. (Midwest Labs) for Exelon Nuclear to comply with Radiological Effluent Control 12.5.2 of the LaSalles Offsite Dose Calculation Manual. The purpose of the survey was to document the nearest resident, milk producing animal and garden of greater than 500 ft2 in each of the sixteen 22 1/2 degree sectors around the site. The distance and direction of all locations from the LSCS reactor buildings were positioned using Global Positioning System (GPS) technology. There were no changes required to the LSCS REMP as a result of this survey.

The results of this survey are summarized below.

Distance in Miles from the LSCS Reactor Buildings Sector Residence Livestock Milk Farm Miles Miles Miles AN 3.9 4.0 -

B NNE 1.6 1.7 -

C NE 2.1 3.5 -

D ENE 3.3 3.8 -

EE 3.2 - 14.2 F ESE 1.4 - -

G SE 1.7 4.7 -

H SSE 1.8 4.7 -

JS 1.5 4.7 -

K SSW 0.7 - -

L SW 1.0 5.8 -

M WSW 1.5 - -

NW 1.5 3.0 -

P WNW 0.9 3.0 -

Q NW 1.8 4.0 -

R NNW 1.7 4.6 -

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E. Errata Data Teledyne Brown Engineering (TBE) provides data results (activity, uncertainty, and minimum detectable concentration [MDC]). We are required to calculate the MDC using the following equation that includes the 4.66 multiplier:

4.66 MDA = t 2.22 (v) ( y ) (a ) ( )

Where:

t = counting time for sample (minutes)

= background rate of instrument blank (cpm) 2.22 = dpm/pCi or : 2.22 x 106 dpm/µCi v = volume or mass of sample analyzed y = chemical yield

= efficiency of the counter

= radioactive decay constant for the particular radionuclide a = exp (-t)

The formulas used to determine activity, uncertainty, and MDC are contained in the software of the TBE counting equipment. For the gamma system, when the new TBE detector 08 was added to the system in January of 2012, the default multiplier of 3.29 was mistakenly entered into the calculations for MDC values on detector 08. On April 15th, 2013, the multiplier was updated from 3.29 to the correct value of 4.66. When the MDCs were recalculated using the 4.66 multiplier, the MDC values increased by 41.6%. The greatest impact was on the short-lived nuclides that have LLD requirements, e.g. I-131, Ba-140, and La-140. The activity and uncertainty calculations were not affected. Several results were affected for LaSalle Station and are listed in Appendix G, Errata Data.

All samples from LaSalle Station that were analyzed on TBE detector 08, during the above mentioned timeframe, are identified in Appendix G, Errata Data. All sample results that were affected by the error are identified in Appendix G, noting the affected nuclide, the required MDC, the actual MDC, and the units. The sample results that were not affected by the incorrect multiplier are noted with

in the appropriate locations of Appendix G.

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F. Summary of Results - Inter-Laboratory Comparison Program The primary and secondary laboratories analyzed Performance Evaluation (PE) samples of air particulate, air iodine, milk, soil, vegetation and water matrices (Appendix D). The PE samples, supplied by Analytics Inc., Environmental Resource Associates (ERA) and DOEs Mixed Analyte Performance Evaluation Program (MAPEP), were evaluated against the following pre-set acceptance criteria:

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

2. ERA Evaluation Criteria ERAs evaluation report provides an acceptance range for control and warning limits with associated flag values. ERAs acceptance limits are established per the USEPA, NELAC, state specific PT program requirements or ERAs SOP for the Generation of Performance Acceptance Limits, as applicable. The acceptance limits are either determined by a regression equation specific to each analyte or a fixed percentage limit promulgated under the appropriate regulatory document.

3. DOE Evaluation Criteria MAPEPs evaluation report provides an acceptance range with associated flag values.

The MAPEP defines three levels of performance: Acceptable (flag = A), Acceptable with Warning (flag = W), and Not Acceptable (flag = N). Performance is considered acceptable when a mean result for the specified analyte is +/- 20% of the reference value. Performance is acceptable with warning when a mean result falls in the range from +/- 20% to +/- 30% of the reference value (i.e., 20% < bias < 30%). If the bias is greater than 30%, the results are deemed not acceptable.

For the TBE laboratory, 178 out of 185 analyses performed met the specified acceptance criteria. Seven analyses (Sr-89 and Sr-90 in milk, Co-57, Zn-65 and Sr-90 in soil, Cs-134 in air particulate and Sr-90 in vegetation [two low warning in a row]) did not meet the specified acceptance criteria or internal QA requirements for the following reason:

Page 19 of 182

1. Teledyne Brown Engineerings Analytics September 2013 Sr-89 in milk result of 63.9 pCi/L was lower than the known value of 96.0 pCi/L. The failure was a result of analyst error and was specific to the Analytics sample. Client samples for the associated time period were evaluated and no client samples were affected by this failure. NCR 13-15

2. Teledyne Brown Engineerings Analytics September 2013 Sr-90 in milk result of 8.88 pCi/L was lower than the known value of 13.2 pCi/L. The failure was a result of analyst error and was specific to the Analytics sample. Client samples for the associated time period were evaluated and no client samples were affected by this failure. NCR 13-15

3. & 4. Teledyne Brown Engineerings MAPEP September 2013 Co-57 and Zn-65 in soil were evaluated as failing the false positive test.

While MAPEP evaluated the results as failures, the gamma software listed the results as non identified nuclides. The two nuclides would never have been reported as detected nuclides to a client. MAPEP does not allow laboratories to put in qualifiers for the submitted data nor less than results. MAPEP evaluates results based on the relationship between the activity and the uncertainty. MAPEP spiked the soil sample with an extremely large concentration of Eu-152, which was identified by the gamma software as an interfering nuclide, resulting in forced activity results that were evaluated by MAPEP as detected Co-57 and Zn-65. No client samples were affected by these failures. NCR 13-14

5. Teledyne Brown Engineerings MAPEP September 2013 Sr-90 in soil result of 664 Bq/kg was higher than the known value of 460 Bq/kg, exceeding the upper control limit of 598 Bq/kg. An incorrect Sr-90 result was entered into the MAPEP database. The correct Sr-90 activity of 322 Bq/kg would have been evaluated as acceptable with warning. No client samples were affected by this failure. NCR 13-14

6. Teledyne Brown Engineerings MAPEP September 2013 Cs-134 in air particulate activity of -0.570 Bq/sample was evaluated as a failed false positive test, based on MAPEPs evaluation of the result as a significant negative value at 3 standard deviations. A negative number would never have been reported as a detected nuclide to a client, therefore no client samples were affected by this failure.

NCR 13-14

7. Teledyne Brown Engineerings MAPEP September 2013 Sr-90 in vegetation result was investigated due to two low warnings in a row. It appears the September sample was double spiked with carrier, resulting in a low activity. With a recovery of around 50%

Page 20 of 182

lower, the Sr-90 result would have fallen within the acceptance range. No client samples were affected by this issue. NCR 13-14 For the EIML laboratory, 89 of 92 analyses met the specified acceptance criteria. Three analyses (AP - Gross Alpha, Soil - Sr-90 and Co-57) did not meet the specified acceptance criteria for the following reasons:

1. Environmental Inc., Midwest Laboratorys MAPEP February 2013 air particulate gross alpha result of 0.14 Bq/total sample was lower than the known value of 1.20 Bq/total sample, exceeding the lower control limit of 0.36 Bq/total sample. The filter was recounted overnight. No significant activity could be detected. The failure was specific to the MAPEP sample, therefore there was no impact to client samples as a result of this issue.

2. Environmental Inc., Midwest Laboratorys MAPEP February 2013 soil Co-57 result of 408.40 Bq/kg was lower than the known value of 628.0 Bq/kg, exceeding the lower control limit of 440.0 Bq/kg. The sample was reanalyzed using additional fuming nitric separations. The reanalysis result of 574.4 fell within the control limits.

3. Environmental Inc., Midwest Laboratorys MAPEP August 2013 soil Co-57 result of 699.60 Bq/kg was higher than the known value of 0.00 Bq/kg, exceeding the upper control limit of 5.00 Bq/kg. Interference from Eu-152 resulted in misidentification of Co-57. The failure was specific to the MAPEP sample, therefore there was no impact to client samples as a result of this issue.

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

Page 21 of 182

APPENDIX A RADIOLOGICAL ENVIRONMENTAL MONITORING REPORT

SUMMARY

Page 22 of 182

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE LASALLE COUNTY STATION, 2013 NAME OF FACILITY: LASALLE DOCKET NUMBER: 50-373 & 50-374 2013 LOCATION OF FACILITY: MARSEILLES, IL REPORTING PERIOD: ANNUAL INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN (M) MEAN (M) MEAN (M) STATION # NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS SURFACE WATER GR-B 24 4 8.2 7.9 8.2 L-40 INDICATOR 0 (PCI/LITER) (12/12) (12/12) (12/12) ILLINOIS RIVER - DOWNSTREAM (6.9/8.9) (4.7/10.5) (6.9/8.9) 5.2 MILES NNW OF SITE H-3 8 200 1109 1175 1175 L-21 CONTROL 0 (2/4) (2/4) (2/4) ILLINOIS RIVER AT SENECA - UPSTREAM (528/1690) (559/1790) (559/1790) 4.0 MILES NE OF SITE GAMMA 24 A-1 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 Page 23 of 182 NB-95 15 <LLD <LLD - 0

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE LASALLE COUNTY STATION, 2013 NAME OF FACILITY: LASALLE DOCKET NUMBER: 50-373 & 50-374 2013 LOCATION OF FACILITY: MARSEILLES, IL REPORTING PERIOD: ANNUAL INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN (M) MEAN (M) MEAN (M) STATION # NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS SURFACE WATER ZR-95 30 <LLD <LLD - 0 (PCI/LITER)

I-131 15 <LLD <LLD - 0 CS-134 15 <LLD <LLD - 0 A-2 CS-137 18 <LLD <LLD - 0 BA-140 60 <LLD <LLD - 0 LA-140 15 <LLD <LLD - 0 GROUND WATER H-3 12 200 <LLD <LLD - 0 (PCI/LITER)

GAMMA 12 Page 24 of 182 MN-54 15 <LLD <LLD - 0

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE LASALLE COUNTY STATION, 2013 NAME OF FACILITY: LASALLE DOCKET NUMBER: 50-373 & 50-374 2013 LOCATION OF FACILITY: MARSEILLES, IL REPORTING PERIOD: ANNUAL INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN (M) MEAN (M) MEAN (M) STATION # NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS GROUND WATER CO-58 15 <LLD <LLD - 0 (PCI/LITER)

FE-59 30 <LLD <LLD - 0 CO-60 15 <LLD <LLD - 0 A-3 ZN-65 30 <LLD <LLD - 0 NB-95 15 <LLD <LLD - 0 ZR-95 30 <LLD <LLD - 0 CS-134 15 <LLD <LLD - 0 CS-137 18 <LLD <LLD - 0 Page 25 of 182

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE LASALLE COUNTY STATION, 2013 NAME OF FACILITY: LASALLE DOCKET NUMBER: 50-373 & 50-374 2013 LOCATION OF FACILITY: MARSEILLES, IL REPORTING PERIOD: ANNUAL INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN (M) MEAN (M) MEAN (M) STATION # NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS GROUND WATER BA-140 60 <LLD <LLD - 0 (PCI/LITER)

LA-140 15 <LLD <LLD - 0 FISH GAMMA 12 A-4 (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 Page 26 of 182 NB-95 NA <LLD <LLD - 0

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE LASALLE COUNTY STATION, 2013 NAME OF FACILITY: LASALLE DOCKET NUMBER: 50-373 & 50-374 2013 LOCATION OF FACILITY: MARSEILLES, IL REPORTING PERIOD: ANNUAL INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN (M) MEAN (M) MEAN (M) STATION # NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS FISH ZR-95 NA <LLD <LLD - 0 (PCI/KG WET)

CS-134 130 <LLD <LLD - 0 CS-137 150 <LLD <LLD - 0 A-5 BA-140 NA <LLD <LLD - 0 LA-140 NA <LLD <LLD - 0 SEDIMENT GAMMA 6 (PCI/KG DRY) MN-54 NA <LLD <LLD - 0 CO-58 NA <LLD <LLD - 0 Page 27 of 182 FE-59 NA <LLD <LLD - 0

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE LASALLE COUNTY STATION, 2013 NAME OF FACILITY: LASALLE DOCKET NUMBER: 50-373 & 50-374 2013 LOCATION OF FACILITY: MARSEILLES, IL REPORTING PERIOD: ANNUAL INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN (M) MEAN (M) MEAN (M) STATION # NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS SEDIMENT CO-60 NA <LLD <LLD - 0 (PCI/KG DRY)

ZN-65 NA <LLD <LLD - 0 NB-95 NA <LLD <LLD - 0 A-6 ZR-95 NA <LLD <LLD - 0 CS-134 150 <LLD <LLD - 0 CS-137 180 <LLD 122 122 L-21 CONTROL 0 (1/2) (1/2) ILLINOIS RIVER AT SENECA - UPSTREAM 4.0 MILES NE OF SITE BA-140 NA <LLD <LLD - 0 LA-140 NA <LLD <LLD - 0 Page 28 of 182

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE LASALLE COUNTY STATION, 2013 NAME OF FACILITY: LASALLE DOCKET NUMBER: 50-373 & 50-374 2013 LOCATION OF FACILITY: MARSEILLES, IL REPORTING PERIOD: ANNUAL INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN (M) MEAN (M) MEAN (M) STATION # NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS AIR PARTICULATE GR-B 468 10 20 20 21 L-11 INDICATOR 0 (E-3 PCI/CU.METER) (414/416) (52/52) (52/52) RANSOM (5/57) (7/52) (10/46) 6.0 MILES S OF SITE GAMMA 36 MN-54 NA <LLD <LLD - 0 A-7 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 Page 29 of 182 ZR-95 NA <LLD <LLD - 0

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE LASALLE COUNTY STATION, 2013 NAME OF FACILITY: LASALLE DOCKET NUMBER: 50-373 & 50-374 2013 LOCATION OF FACILITY: MARSEILLES, IL REPORTING PERIOD: ANNUAL INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN (M) MEAN (M) MEAN (M) STATION # NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS AIR PARTICULATE CS-134 50 <LLD <LLD - 0 (E-3 PCI/CU.METER)

CS-137 60 <LLD <LLD - 0 BA-140 NA <LLD <LLD - 0 A-8 LA-140 NA <LLD <LLD - 0 AIR IODINE GAMMA 468 (E-3 PCI/CU.METER) I-131 70 <LLD <LLD - 0 MILK I-131 20 1 NA <LLD - 0 (PCI/LITER)

GAMMA 20 MN-54 NA NA <LLD - 0 Page 30 of 182 CO-58 NA NA <LLD - 0

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE LASALLE COUNTY STATION, 2013 NAME OF FACILITY: LASALLE DOCKET NUMBER: 50-373 & 50-374 2013 LOCATION OF FACILITY: MARSEILLES, IL REPORTING PERIOD: ANNUAL INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN (M) MEAN (M) MEAN (M) STATION # NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS MILK FE-59 NA NA <LLD - 0 (PCI/LITER)

CO-60 NA NA <LLD - 0 ZN-65 NA NA <LLD - 0 A-9 NB-95 NA NA <LLD - 0 ZR-95 NA NA <LLD - 0 CS-134 15 NA <LLD - 0 CS-137 18 NA <LLD - 0 BA-140 60 NA <LLD - 0 Page 31 of 182

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE LASALLE COUNTY STATION, 2013 NAME OF FACILITY: LASALLE DOCKET NUMBER: 50-373 & 50-374 2013 LOCATION OF FACILITY: MARSEILLES, IL REPORTING PERIOD: ANNUAL INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN (M) MEAN (M) MEAN (M) STATION # NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS MILK LA-140 15 NA <LLD - 0 (PCI/LITER)

VEGETATION GAMMA 10 (PCI/KG WET) MN-54 NA <LLD <LLD - 0 A-10 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 Page 32 of 182 ZR-95 NA <LLD <LLD - 0

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE LASALLE COUNTY STATION, 2013 NAME OF FACILITY: LASALLE DOCKET NUMBER: 50-373 & 50-374 2013 LOCATION OF FACILITY: MARSEILLES, IL REPORTING PERIOD: ANNUAL INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN (M) MEAN (M) MEAN (M) STATION # NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS VEGETATION I-131 60 <LLD <LLD - 0 (PCI/KG WET)

CS-134 60 <LLD <LLD - 0 CS-137 80 <LLD <LLD - 0 A-11 BA-140 NA <LLD <LLD - 0 LA-140 NA <LLD <LLD - 0 DIRECT RADIATION OSLD-QUARTERLY 333 NA 22.9 20.5 25.8 L-102-2 INDICATOR 0 (MREM/QTR.) (325/325) (8/8) (4/4)

(16.1/27.4) (19.0/22.3) (25.1/26.3) 0.6 MILES NNE Page 33 of 182

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

APPENDIX B LOCATION DESIGNATION, DISTANCE & DIRECTION, AND SAMPLE COLLECTION & ANALYTICAL METHODS Page 34 of 182

TABLE B-1: Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, LaSalle County Station, 2013 Location Location Description Distance & Direction From Site A. Surface Water L-21 Illinois River at Seneca, Upstream (control) 4.0 miles NE L-40 Illinois River, Downstream (indicator) 5.2 miles NNW B. Ground/Well Water L-27 LSCS Onsite Well (indicator) 0 miles at station L-28-W4 Marseilles Well (control) 7.0 miles NNW L-28-W5 Marseilles Well (control) 6.7 miles NNW L-28-W6 Marseilles Well (indicator) 4.1 miles N C. Milk - bi-weekly / monthly L-42 Biros Farm (control) 14.2 miles E D. Air Particulates / Air Iodine L-01 Nearsite 1 (indicator) 1.5 miles NNW L-03 Onsite 3 (indicator) 1.0 miles ENE L-04 Rte. 170 (indicator) 3.2 miles E L-05 Onsite 5 (indicator) 0.3 miles ESE L-06 Nearsite 6 (indicator) 0.4 miles W L-07 Seneca (indicator) 5.2 miles NNE L-08 Marseilles (indicator) 6.0 miles NNW L-10 Streator (control) 13.5 miles SW L-11 Ransom (indicator) 6.0 miles S E. Fish L-34 LaSalle Cooling Lake (indicator) 2.0 miles E L-35 Marseilles Pool of Illinois River, Downstream (indicator) 6.5 miles NNW L-36 Illinois River, Upstream of Discharge (control) 4.3 miles NE F. Sediment L-21 Illinois River at Seneca, Upstream (control) 4.0 miles NE L-40 Illinois River, Downstream (indicator) 5.2 miles NNW L-41 Illinois River, Downstream (indicator) 4.6 miles N G. Food Products Quadrant 1 Diane Partridge 4.5 miles NE Quadrant 2 Mike and Gina Welbourne 3.8 miles ESE Quadrant 3 Michael Olson 1.5 miles WSW Quadrant 4 Robert Eisers 4.5 miles NW Control Eugene Clements 10.0 miles NW B-1 Page 35 of 182

TABLE B-1: Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, LaSalle County Station, 2013 Location Location Description Distance & Direction From Site H. Environmental Dosimetry - OSLD Inner Ring L-101-1 and -2 0.5 miles N L-102-1 and -2 0.6 miles NNE L-103-1 and -2 0.7 miles NE L-104-1 and -2 0.8 miles ENE L-105-1 and -2 0.7 miles E L-106-1 and -2 1.4 miles ESE L-107-1 and -2 0.8 miles SE L-108-1 and -2 0.5 miles SSE L-109-1 and -2 0.6 miles S L-110-1 and -2 0.6 miles SSW L-111b-1 and -2 0.8 miles SW L-112-1 and -2 0.9 miles WSW L-113a-1 and -2 0.8 miles W L-114-1 and -2 0.9 miles WNW L-115-1 and -2 0.7 miles NW L-116-1 and -2 0.6 miles NNW Outer Ring L-201-3 and -4 4.0 miles N L-202-3 and -4 3.6 miles NNE L-203-1 and -2 4.0 miles NE L-204-1 and -2 3.2 miles ENE L-205-1 and -2 3.2 miles ESE L-205-3 and -4 5.1 miles E L-206-1 and -2 4.3 miles SE L-207-1 and -2 4.5 miles SSE L-208-1 and -2 4.5 miles S L-209-1 and -2 4.0 miles SSW L-210-1 and -2 3.3 miles SW L-211-1 and -2 4.5 miles WSW L-212-1 and -2 4.0 miles W L-213-3 and -4 4.9 miles W L-214-3 and -4 5.1 miles WNW L-215-3 and -4 5.0 miles NW L-216-3 and -4 5.0 miles NNW Other L-01-1 and -2 Nearsite 1 (indicator) 1.5 miles NNW L-03-1 and -2 Onsite 3 (indicator) 1.0 miles ENE L-04-1 and -2 Rte. 170 (indicator) 3.2 miles E L-05-1 and -2 Onsite 5 (indicator) 0.3 miles ESE L-06-1 and -2 Nearsite 6 (indicator) 0.4 miles W L-07-1 and -2 Seneca (indicator) 5.2 miles NNE L-08-1 and -2 Marseilles (indicator) 6.0 miles NNW L-11-1 and -2 Ransom (indicator) 6.0 miles S Control and Special Interest L-10-1 and -2 Streator 13.5 miles SW B-2 Page 36 of 182

TABLE B-2: Radiological Environmental Monitoring Program - Summary of Sample Collection and Analytical Methods, LaSalle County Station, 2013 Sample Medium Analysis Sampling Method Analytical Procedure Number Surface Water Gamma Monthly composite TBE, TBE-2007 Gamma emitting radioisotope analysis Spectroscopy from weekly grab samples. Env. Inc., GS-01 Determination of gamma emitters by gamma spectroscopy Surface Water Gross Beta Monthly composite TBE, TBE-2008 Gross Alpha and/or gross beta activity in from weekly grab various matrices samples.

Env. Inc., W(DS)-01 Determination of gross alpha and/or gross beta in water (dissolved solids or total residue)

Surface Water Tritium Quarterly composite TBE, TBE-2011 Tritium analysis in drinking water by liquid from weekly grab scintillation samples.

Env. Inc., T-02 Determination of tritium in water (direct method)

Ground/Well Water Gamma Quarterly grab TBE, TBE-2007 Gamma emitting radioisotope analysis Spectroscopy samples.

Env. Inc., GS-01 Determination of gamma emitters by gamma spectroscopy Ground/Well Water Tritium Quarterly grab TBE, TBE-2011 Tritium analysis in drinking water by liquid samples. scintillation Env. Inc., T-02 Determination of tritium in water (direct method)

Fish Gamma Semi-annual samples TBE-2007 Gamma emitting radioisotope analysis Spectroscopy collected via electroshocking or Env. Inc., GS-01 Determination of gamma emitters by other techniques gamma spectroscopy Sediment Gamma Semi-annual grab TBE, TBE-2007 Gamma emitting radioisotope analysis Spectroscopy samples Env. Inc., GS-01 Determination of gamma emitters by gamma spectroscopy Air Particulates Gross Beta One-week composite TBE, TBE-2008 Gross Alpha and/or gross beta activity in of continuous air various matrices sampling through glass fiber filter paper Env. Inc., AP-02 Determination of gross alpha and/or gross beta in air particulate filters Air Particulates Gamma Quarterly composite of TBE, TBE-2007 Gamma emitting radioisotope analysis Spectroscopy each station Env. Inc., GS-01 Determination of gamma emitters by gamma spectroscopy Air Iodine Gamma Bi-weekly composite of TBE, TBE-2007 Gamma emitting radioisotope analysis Spectroscopy continuous air sampling through Env. Inc., I-131-02 Determination of I-131 in charcoal charcoal filter canisters by gamma spectroscopy (batch method)

Milk I-131 Bi-weekly grab sample TBE, TBE-2012 Radioiodine in various matrices when cows are on pasture. Monthly all Env. Inc., I-131-01 Determination of I-131 in milk by an other times ion exchange Milk Gamma Bi-weekly grab sample TBE, TBE-2007 Gamma emitting radioisotope analysis Spectroscopy when cows are on pasture. Monthly all Env. Inc., GS-01 Determination of gamma emitters by other times gamma spectroscopy Food Products Gamma Annual grab samples. TBE, TBE-2007 Gamma emitting radioisotope analysis Spectroscopy Env. Inc., GS-01 Determination of gamma emitters by gamma spectroscopy OSLD Optically Stimulated Quarterly OSLDs Landauer Incorporated Luminescence comprised of two Dosimetry Al2O3:C Landauer Incorporated elements.

B-3 Page 37 of 182

B-4 Figure B-1 Inner Ring OSLD Locations of the LaSalle County Station, 2013 Page 38 of 182

Figure B-2 Outer Ring OSLD Locations and Fixed Air Sampling Locations of the LaSalle County Station, 2013 B-5 Page 39 of 182

Figure B-3 Ingestion and Waterborne Exposure Pathway Sample Locations of the LaSalle County Station, 2013 B-6 Page 40 of 182

APPENDIX C DATA TABLES AND FIGURES PRIMARY LABORATORY Page 41 of 182

Table C-I.1 CONCENTRATIONS OF GROSS BETA IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2013 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION L-21 L-40 PERIOD 01/03/13 - 01/31/13 9.3 +/- 2.1 8.9 +/- 2.0 02/07/13 - 02/28/13 7.3 +/- 2.1 8.1 +/- 2.2 03/07/13 - 03/27/13 8.1 +/- 2.1 8.2 +/- 2.1 04/04/13 - 04/25/13 6.5 +/- 1.7 6.9 +/- 1.6 05/02/13 - 05/30/13 4.7 +/- 1.9 6.9 +/- 2.0 06/06/13 - 06/27/13 8.4 +/- 1.6 8.0 +/- 1.6 07/04/13 - 07/25/13 6.6 +/- 1.6 8.1 +/- 1.7 08/01/13 - 08/29/13 8.8 +/- 1.7 8.5 +/- 1.6 09/05/13 - 09/25/13 7.2 +/- 2.0 8.6 +/- 2.0 10/03/13 - 10/31/13 10.5 +/- 1.8 8.5 +/- 1.7 11/07/13 - 11/27/13 7.6 +/- 1.6 8.3 +/- 1.6 12/05/13 - 12/26/13 9.7 +/- 1.9 8.9 +/- 1.8 MEAN 7.9 +/- 3.2 8.2 +/- 1.3 Table C-I.2 CONCENTRATIONS OF TRITIUM IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2013 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION L-21 L-40 PERIOD 01/03/13 - 03/27/13 < 197 < 192 04/04/13 - 06/27/13 < 193 < 184 07/04/13 - 09/25/13 1790 +/- 227 1690 +/- 219 10/03/13 - 12/26/13 559 +/- 146 528 +/- 145 MEAN 1175 +/- 1741 1109 +/- 1643 THE MEAN AND TWO STANDARD DEVIATION ARE CALCULATED USING THE POSITIVE VALUES C-1 Page 42 of 182

Table C-I.3 CONCENTRATIONS OF GAMMA EMITTERS IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2013 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA SITE COLLECTION Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 I-131 Cs-134 Cs-137 Ba-140 La-140 PERIOD L-21 01/03/13 - 01/31/13 < 1 < 1 < 2 < 1 < 1 < 1 < 2 < 15 < 1 < 1 < 16 < 4 02/07/13 - 02/28/13 < 2 < 2 < 6 < 2 < 4 < 2 < 4 < 13 < 2 < 2 < 24 < 8 03/07/13 - 03/27/13 < 2 < 2 < 6 < 2 < 4 < 2 < 4 < 13 < 2 < 2 < 23 < 9 04/04/13 - 04/25/13 < 2 < 2 < 4 < 2 < 3 < 2 < 3 < 11 < 2 < 2 < 18 < 6 05/02/13 - 05/30/13 < 2 < 2 < 5 < 2 < 4 < 2 < 4 < 3 < 2 < 2 < 30 < 9 06/06/13 - 06/27/13 < 1 < 1 < 3 < 1 < 2 < 1 < 2 < 13 < 1 < 1 < 17 < 6 07/04/13 - 07/25/13 < 2 < 2 < 5 < 2 < 4 < 2 < 4 < 13 < 2 < 2 < 23 < 8 08/01/13 - 08/29/13 < 1 < 1 < 3 < 1 < 2 < 1 < 3 < 13 < 1 < 1 < 18 < 5 09/05/13 - 09/25/13 < 2 < 2 < 5 < 1 < 3 < 2 < 4 < 6 < 2 < 2 < 43 < 12 10/03/13 - 10/31/13 < 1 < 1 < 3 < 1 < 2 < 1 < 3 < 11 < 1 < 1 < 17 < 6 11/07/13 - 11/27/13 < 1 < 1 < 3 < 1 < 2 < 1 < 2 < 12 < 1 < 1 < 16 < 5 12/05/13 - 12/26/13 < 2 < 2 < 5 < 2 < 3 < 2 < 3 < 13 < 2 < 2 < 19 < 7 C-2 MEAN - - - - - - - - - - - -

L-40 01/03/13 - 01/31/13 < 1 < 1 < 3 < 1 < 2 < 1 < 2 < 15 < 1 < 1 < 17 < 5 02/07/13 - 02/28/13 < 2 < 2 < 5 < 2 < 3 < 2 < 4 < 13 < 2 < 2 < 21 < 6 03/07/13 - 03/27/13 < 1 < 2 < 4 < 1 < 3 < 2 < 3 < 12 < 1 < 2 < 19 < 5 04/04/13 - 04/25/13 < 2 < 3 < 6 < 2 < 5 < 3 < 5 < 14 < 2 < 2 < 25 < 9 05/02/13 - 05/30/13 < 2 < 2 < 6 < 2 < 4 < 2 < 4 < 8 < 2 < 2 < 30 < 10 06/06/13 - 06/27/13 < 1 < 1 < 3 < 1 < 2 < 1 < 2 < 14 < 1 < 1 < 17 < 6 07/04/13 - 07/25/13 < 2 < 2 < 5 < 2 < 4 < 2 < 4 < 12 < 2 < 2 < 21 < 7 08/01/13 - 08/29/13 < 1 < 1 < 3 < 1 < 2 < 1 < 2 < 14 < 1 < 1 < 19 < 6 09/05/13 - 09/25/13 < 2 < 2 < 5 < 2 < 3 < 2 < 3 < 7 < 1 < 2 < 37 < 14 10/03/13 - 10/31/13 < 1 < 1 < 3 < 1 < 2 < 1 < 2 < 11 < 1 < 1 < 14 < 4 11/07/13 - 11/27/13 < 1 < 1 < 2 < 1 < 2 < 1 < 2 < 13 < 1 < 1 < 17 < 5 12/05/13 - 12/26/13 < 2 < 2 < 4 < 1 < 3 < 2 < 3 < 13 < 1 < 2 < 20 < 5 MEAN - - - - - - - - - - - -

Page 43 of 182

Table C-II.1 CONCENTRATIONS OF TRITIUM IN GROUND/WELL WATER SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2013 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION L-27 L-28-W4 L-28-W5 L-28-W6 PERIOD 01/10/13 - 01/10/13 < 172 < 170 < 170 04/11/13 - 04/11/13 < 177 < 177 < 176 07/11/13 - 07/11/13 < 191 < 190 < 193 10/10/13 - 10/10/13 < 171 < 177 < 177 MEAN - - - -

C-3 Page 44 of 182

Table C-II.2 CONCENTRATIONS OF GAMMA EMITTERS IN GROUND/WELL WATER SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2013 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA SITE COLLECTION Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140 La-140 PERIOD L-27 01/10/13 - 01/10/13 < 4 < 4 < 9 < 5 < 9 < 5 < 7 < 5 < 5 < 31 < 8 04/11/13 - 04/11/13 < 5 < 6 < 11 < 5 < 10 < 6 < 10 < 4 < 6 < 32 < 9 07/11/13 - 07/11/13 < 6 < 6 < 14 < 6 < 12 < 6 < 12 < 6 < 7 < 32 < 12 10/10/13 - 10/10/13 < 2 < 2 < 6 < 2 < 4 < 3 < 4 < 2 < 2 < 24 < 8 MEAN - - - - - - - - - - -

L-28-W4 04/11/13 - 04/11/13 < 5 < 5 < 9 < 5 < 11 < 5 < 9 < 4 < 5 < 33 < 12 10/10/13 - 10/10/13 < 2 < 2 < 4 < 2 < 3 < 2 < 3 < 2 < 2 < 18 < 6 MEAN - - - - - - - - - - -

L-28-W5 01/10/13 - 01/10/13 < 4 < 4 < 10 < 4 < 7 < 5 < 8 < 4 < 4 < 27 < 10 C-4 07/11/13 - 07/11/13 < 4 < 4 < 9 < 3 < 9 < 4 < 7 < 4 < 4 < 27 < 8 MEAN - - - - - - - - - - -

L-28-W6 01/10/13 - 01/10/13 < 4 < 4 < 10 < 4 < 10 < 5 < 9 < 4 < 5 < 28 < 10 04/11/13 - 04/11/13 < 5 < 5 < 11 < 5 < 11 < 6 < 9 < 4 < 5 < 36 < 12 07/11/13 - 07/11/13 < 4 < 4 < 10 < 5 < 9 < 5 < 7 < 4 < 4 < 26 < 9 10/10/13 - 10/10/13 < 2 < 2 < 4 < 2 < 4 < 2 < 4 < 1 < 2 < 18 < 6 MEAN - - - - - - - - - - -

Page 45 of 182

Table C-III.1 CONCENTRATIONS OF GAMMA EMITTERS IN FISH SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2013 RESULTS IN UNITS OF PC/KG WET +/- 2 SIGMA SITE COLLECTION Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140 La-140 PERIOD L-34 Common Carp 05/02/13 < 59 < 72 < 168 < 75 < 99 < 88 < 136 < 63 < 53 < 904 < 310 Largemouth Bass 05/02/13 < 44 < 36 < 127 < 42 < 81 < 58 < 91 < 47 < 37 < 800 < 236 Channel Catfish 10/02/13 < 55 < 71 < 121 < 69 < 140 < 66 < 122 < 47 < 57 < 571 < 198 Common Carp 10/02/13 < 71 < 59 < 160 < 61 < 137 < 67 < 109 < 49 < 58 < 549 < 147 MEAN - - - - - - - - - - -

L-35 Channel Catfish 05/02/13 < 53 < 60 < 147 < 48 < 106 < 64 < 110 < 47 < 53 < 787 < 220 Smallmouth Buffalo 05/02/13 < 61 < 81 < 195 < 69 < 133 < 61 < 123 < 59 < 67 < 1020 < 276 Common Carp 10/03/13 < 56 < 64 < 123 < 51 < 103 < 59 < 87 < 51 < 62 < 450 < 119 C-5 Smallmouth Buffalo 10/03/13 < 56 < 52 < 125 < 61 < 138 < 72 < 118 < 66 < 58 < 589 < 115 MEAN - - - - - - - - - - -

L-36 Channel Catfish 05/02/13 < 57 < 61 < 135 < 68 < 128 < 64 < 135 < 54 < 59 < 949 < 237 Smallmouth Buffalo 05/02/13 < 52 < 70 < 151 < 62 < 126 < 74 < 115 < 56 < 56 < 945 < 231 Smallmouth Bass 10/03/13 < 50 < 53 < 105 < 69 < 108 < 60 < 98 < 44 < 61 < 422 < 130 Smallmouth Buffalo 10/03/13 < 48 < 51 < 101 < 48 < 100 < 58 < 109 < 51 < 53 < 470 < 119 MEAN - - - - - - - - - - -

Page 46 of 182

Table C-IV.1 CONCENTRATIONS OF GAMMA EMITTERS IN SEDIMENT SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2013 RESULTS IN UNITS OF PC/KG DRY +/- 2 SIGMA SITE COLLECTION Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140 La-140 PERIOD L-21 05/09/13 < 76 < 94 < 214 < 114 < 178 < 123 < 184 < 82 < 118 < 882 < 285 10/03/13 < 79 < 107 < 262 < 92 < 192 < 124 < 186 < 67 122 +/- 75 < 1642 < 530 MEAN - - - - - - - - - - -

L-40 05/09/13 < 65 < 68 < 175 < 73 < 156 < 88 < 141 < 60 < 76 < 659 < 187 10/03/13 < 77 < 81 < 270 < 91 < 156 < 100 < 167 < 69 < 75 < 1520 < 424 MEAN - - - - - - - - - - -

L-41 05/09/13 < 49 < 58 < 154 < 61 < 144 < 57 < 108 < 40 < 53 < 485 < 123 10/03/13 < 45 < 58 < 156 < 52 < 112 < 68 < 112 < 42 < 49 < 1022 < 224 C-6 MEAN - - - - - - - - - - -

Page 47 of 182

Table C-V.1 CONCENTRATIONS OF GROSS BETA IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2013 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA COLLECTION GROUP I GROUP II GROUP III GROUP IV PERIOD L-03 L-05 L-01 L-06 L-04 L-07 L-08 L-11 L-10 01/03/13 - 01/10/13 52 +/- 6 48 +/- 6 54 +/- 6 48 +/- 6 48 +/- 6 49 +/- 6 57 +/- 6 46 +/- 6 52 +/- 6 01/10/13 - 01/17/13 24 +/- 5 24 +/- 5 31 +/- 5 25 +/- 5 22 +/- 5 27 +/- 5 28 +/- 5 23 +/- 5 28 +/- 5 01/17/13 - 01/24/13 18 +/- 4 20 +/- 5 21 +/- 5 21 +/- 5 18 +/- 4 17 +/- 4 21 +/- 5 16 +/- 4 14 +/- 4 01/24/13 - 01/31/13 24 +/- 5 29 +/- 5 23 +/- 5 25 +/- 5 24 +/- 5 24 +/- 5 30 +/- 5 27 +/- 5 21 +/- 5 01/31/13 - 02/07/13 36 +/- 5 32 +/- 5 29 +/- 5 34 +/- 5 29 +/- 5 34 +/- 5 32 +/- 5 32 +/- 5 31 +/- 5 02/07/13 - 02/14/13 17 +/- 4 14 +/- 4 22 +/- 5 29 +/- 5 18 +/- 4 22 +/- 5 20 +/- 4 20 +/- 4 15 +/- 4 02/14/13 - 02/21/13 15 +/- 4 17 +/- 4 15 +/- 4 19 +/- 5 14 +/- 4 18 +/- 4 20 +/- 5 16 +/- 4 14 +/- 4 02/21/13 - 02/28/13 12 +/- 4 11 +/- 4 14 +/- 4 25 +/- 5 10 +/- 4 16 +/- 4 15 +/- 4 14 +/- 4 13 +/- 4 02/28/13 - 03/07/13 12 +/- 4 11 +/- 4 16 +/- 4 11 +/- 4 12 +/- 4 15 +/- 4 11 +/- 4 13 +/- 4 13 +/- 4 03/07/13 - 03/14/13 21 +/- 5 18 +/- 5 15 +/- 4 15 +/- 4 16 +/- 5 16 +/- 5 19 +/- 5 15 +/- 5 20 +/- 5 03/14/13 - 03/21/13 20 +/- 5 21 +/- 4 21 +/- 5 21 +/- 5 17 +/- 4 21 +/- 5 18 +/- 4 15 +/- 4 19 +/- 4 03/21/13 - 03/27/13 11 +/- 4 13 +/- 4 12 +/- 4 11 +/- 4 11 +/- 4 8 +/- 4 8 +/- 4 22 +/- 5 9 +/- 4 03/27/13 - 04/04/13 13 +/- 3 18 +/- 4 19 +/- 4 15 +/- 4 16 +/- 4 18 +/- 4 17 +/- 4 19 +/- 4 15 +/- 4 04/04/13 - 04/11/13 10 +/- 4 22 +/- 5 14 +/- 4 15 +/- 4 12 +/- 4 12 +/- 4 16 +/- 4 17 +/- 4 14 +/- 4 04/11/13 - 04/18/13 8 +/- 4 < 5 11 +/- 4 10 +/- 4 10 +/- 4 5 +/- 3 8 +/- 4 10 +/- 4 7 +/- 4 04/18/13 - 04/25/13 < 9 (1) 14 +/- 4 16 +/- 4 17 +/- 4 17 +/- 4 13 +/- 4 14 +/- 4 14 +/- 4 15 +/- 4 04/25/13 - 05/02/13 25 +/- 5 21 +/- 4 23 +/- 5 24 +/- 5 21 +/- 4 18 +/- 4 22 +/- 4 21 +/- 4 26 +/- 5 05/02/13 - 05/09/13 12 +/- 4 13 +/- 4 15 +/- 4 9 +/- 4 12 +/- 4 11 +/- 4 14 +/- 4 13 +/- 4 8 +/- 4 05/09/13 - 05/16/13 20 +/- 5 15 +/- 5 15 +/- 5 13 +/- 4 18 +/- 5 18 +/- 5 14 +/- 4 18 +/- 5 15 +/- 5 05/16/13 - 05/23/13 17 +/- 4 18 +/- 4 19 +/- 4 19 +/- 4 17 +/- 4 17 +/- 4 15 +/- 4 20 +/- 5 15 +/- 4 05/23/13 - 05/30/13 15 +/- 5 11 +/- 4 8 +/- 4 (1) 12 +/- 4 20 +/- 5 11 +/- 4 9 +/- 4 14 +/- 4 13 +/- 4 05/30/13 - 06/06/13 10 +/- 4 8 +/- 4 8 +/- 4 9 +/- 4 10 +/- 4 7 +/- 4 7 +/- 4 10 +/- 4 10 +/- 4 06/06/13 - 06/13/13 19 +/- 4 18 +/- 4 18 +/- 4 16 +/- 4 20 +/- 4 15 +/- 4 17 +/- 4 19 +/- 4 19 +/- 4 06/13/13 - 06/20/13 10 +/- 4 11 +/- 4 12 +/- 4 14 +/- 4 9 +/- 4 13 +/- 4 11 +/- 4 12 +/- 4 12 +/- 4 06/20/13 - 06/27/13 20 +/- 4 19 +/- 4 20 +/- 4 16 +/- 4 17 +/- 4 17 +/- 4 18 +/- 4 20 +/- 4 17 +/- 4 06/27/13 - 07/04/13 11 +/- 4 11 +/- 4 11 +/- 4 11 +/- 4 13 +/- 4 9 +/- 4 11 +/- 4 13 +/- 4 13 +/- 4 07/04/13 - 07/11/13 20 +/- 4 29 +/- 7 (1) 17 +/- 4 16 +/- 4 (1) 17 +/- 4 18 +/- 4 16 +/- 4 23 +/- 4 17 +/- 4 07/11/13 - 07/18/13 13 +/- 4 10 +/- 4 12 +/- 4 12 +/- 4 12 +/- 4 14 +/- 4 11 +/- 4 12 +/- 4 14 +/- 4 07/18/13 - 07/25/13 17 +/- 5 16 +/- 4 10 +/- 4 14 +/- 4 12 +/- 4 12 +/- 4 16 +/- 5 14 +/- 4 14 +/- 4 07/25/13 - 08/01/13 15 +/- 4 14 +/- 4 13 +/- 4 16 +/- 4 11 +/- 4 15 +/- 4 10 +/- 4 14 +/- 4 15 +/- 4 08/01/13 - 08/08/13 18 +/- 4 17 +/- 4 17 +/- 4 20 +/- 5 14 +/- 4 19 +/- 4 19 +/- 4 21 +/- 5 18 +/- 4 08/08/13 - 08/14/13 20 +/- 5 22 +/- 5 15 +/- 4 19 +/- 5 17 +/- 4 16 +/- 4 18 +/- 4 22 +/- 5 23 +/- 5 08/14/13 - 08/22/13 28 +/- 5 26 +/- 5 24 +/- 5 26 +/- 5 27 +/- 5 28 +/- 5 27 +/- 5 35 +/- 5 32 +/- 5 08/22/13 - 08/29/13 27 +/- 5 24 +/- 5 23 +/- 5 27 +/- 5 19 +/- 5 30 +/- 5 24 +/- 5 24 +/- 5 22 +/- 5 08/29/13 - 09/05/13 20 +/- 5 19 +/- 5 22 +/- 5 18 +/- 4 16 +/- 4 21 +/- 5 20 +/- 5 20 +/- 5 27 +/- 5 09/05/13 - 09/12/13 40 +/- 6 35 +/- 5 35 +/- 5 40 +/- 6 32 +/- 5 38 +/- 5 41 +/- 6 34 +/- 5 37 +/- 5 09/12/13 - 09/19/13 22 +/- 5 22 +/- 5 20 +/- 4 24 +/- 5 19 +/- 4 18 +/- 4 15 +/- 4 21 +/- 5 23 +/- 5 09/19/13 - 09/25/13 13 +/- 4 14 +/- 4 12 +/- 4 18 +/- 5 14 +/- 4 16 +/- 5 16 +/- 5 15 +/- 4 19 +/- 5 09/25/13 - 10/03/13 23 +/- 4 25 +/- 5 24 +/- 4 27 +/- 5 25 +/- 5 23 +/- 4 20 +/- 4 25 +/- 5 26 +/- 5 10/03/13 - 10/10/13 22 +/- 5 18 +/- 4 18 +/- 4 20 +/- 5 19 +/- 5 20 +/- 5 20 +/- 5 17 +/- 4 17 +/- 4 10/10/13 - 10/17/13 21 +/- 5 18 +/- 5 21 +/- 5 19 +/- 5 20 +/- 5 23 +/- 5 21 +/- 5 19 +/- 5 22 +/- 5 10/17/13 - 10/23/13 18 +/- 5 15 +/- 5 17 +/- 5 18 +/- 5 17 +/- 5 22 +/- 5 15 +/- 5 15 +/- 5 17 +/- 5 10/23/13 - 10/31/13 21 +/- 4 17 +/- 4 21 +/- 5 21 +/- 5 19 +/- 4 23 +/- 5 20 +/- 4 23 +/- 5 22 +/- 5 10/31/13 - 11/07/13 24 +/- 5 25 +/- 5 23 +/- 5 25 +/- 5 27 +/- 5 25 +/- 5 23 +/- 5 23 +/- 5 22 +/- 5 11/07/13 - 11/14/13 20 +/- 5 18 +/- 5 21 +/- 5 18 +/- 5 16 +/- 4 23 +/- 5 20 +/- 5 19 +/- 5 17 +/- 5 11/14/13 - 11/21/13 19 +/- 4 16 +/- 4 18 +/- 4 22 +/- 5 18 +/- 4 21 +/- 4 13 +/- 4 24 +/- 5 13 +/- 4 11/21/13 - 11/27/13 18 +/- 5 17 +/- 5 24 +/- 5 22 +/- 5 21 +/- 5 21 +/- 5 18 +/- 5 18 +/- 5 18 +/- 5 11/27/13 - 12/05/13 34 +/- 5 33 +/- 5 34 +/- 5 39 +/- 5 36 +/- 5 42 +/- 5 38 +/- 5 42 +/- 5 40 +/- 5 12/05/13 - 12/12/13 36 +/- 5 39 +/- 6 39 +/- 6 38 +/- 6 36 +/- 5 41 +/- 6 33 +/- 5 43 +/- 6 40 +/- 6 12/12/13 - 12/19/13 29 +/- 5 28 +/- 5 32 +/- 5 33 +/- 5 24 +/- 5 31 +/- 5 35 +/- 5 32 +/- 5 30 +/- 5 12/19/13 - 12/26/13 29 +/- 5 26 +/- 5 30 +/- 5 33 +/- 5 26 +/- 5 30 +/- 5 28 +/- 5 31 +/- 5 28 +/- 5 12/26/13 - 01/02/14 27 +/- 5 31 +/- 5 30 +/- 5 21 +/- 5 28 +/- 5 28 +/- 5 30 +/- 5 26 +/- 5 27 +/- 5 MEAN 20 +/- 17 20 +/- 16 20 +/- 17 21 +/- 17 19 +/- 15 21 +/- 18 20 +/- 19 21 +/- 16 20 +/- 18 THE MEAN AND TWO STANDARD DEVIATION ARE CALCULATED USING THE POSITIVE VALUES (1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION C-7 Page 48 of 182

Table C-V.2 MONTHLY AND YEARLY MEAN VALUES OF GROSS BETA CONCENTRATIONS IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2013 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA GROUP I - NEAR-SITE LOCATIONS GROUP II - FAR-FIELD LOCATIONS GROUP III - FAR-FIELD LOCATIONS GROUP IV - CONTROL LOCATION COLLECTION MIN MAX MEAN +/- COLLECTION MIN MAX MEAN +/- COLLECTION MIN MAX MEAN +/- COLLECTION MIN MAX MEAN +/-

PERIOD 2SD PERIOD 2SD PERIOD 2SD PERIOD 2SD 01/03/13 - 01/31/13 18 52 30 +/- 26 01/03/13 - 01/31/13 21 54 31 +/- 25 01/03/13 - 01/31/13 16 57 30 +/- 26 01/03/13 - 01/31/13 14 52 29 +/- 33 01/31/13 - 02/28/13 11 36 19 +/- 19 01/31/13 - 02/28/13 14 34 23 +/- 14 01/31/13 - 02/28/13 10 34 21 +/- 15 01/31/13 - 02/28/13 13 31 18 +/- 18 02/28/13 - 04/04/13 11 21 16 +/- 8 02/28/13 - 04/04/13 11 21 16 +/- 8 02/28/13 - 04/04/13 8 22 15 +/- 8 02/28/13 - 04/04/13 9 20 15 +/- 9 04/04/13 - 05/02/13 8 25 16 +/- 14 04/04/13 - 05/02/13 10 24 16 +/- 10 04/04/13 - 05/02/13 5 22 14 +/- 10 04/04/13 - 05/02/13 7 26 15 +/- 15 05/02/13 - 05/30/13 11 20 15 +/- 7 05/02/13 - 05/30/13 8 19 14 +/- 8 05/02/13 - 05/30/13 9 20 15 +/- 7 05/02/13 - 05/30/13 8 15 13 +/- 7 05/30/13 - 07/04/13 8 20 14 +/- 9 05/30/13 - 07/04/13 8 20 13 +/- 8 05/30/13 - 07/04/13 7 20 13 +/- 8 05/30/13 - 07/04/13 10 19 14 +/- 7 07/04/13 - 08/01/13 10 29 17 +/- 11 07/04/13 - 08/01/13 10 17 14 +/- 5 07/04/13 - 08/01/13 10 23 14 +/- 6 07/04/13 - 08/01/13 14 17 15 +/- 3 08/01/13 - 08/29/13 17 28 23 +/- 8 08/01/13 - 08/29/13 15 27 21 +/- 9 08/01/13 - 08/29/13 14 35 22 +/- 12 08/01/13 - 08/29/13 18 32 24 +/- 12 08/29/13 - 10/03/13 13 40 23 +/- 17 08/29/13 - 10/03/13 12 40 24 +/- 17 08/29/13 - 10/03/13 14 41 23 +/- 16 08/29/13 - 10/03/13 19 37 26 +/- 14 10/03/13 - 10/31/13 15 22 19 +/- 4 10/03/13 - 10/31/13 17 21 19 +/- 3 10/03/13 - 10/31/13 15 23 20 +/- 5 10/03/13 - 10/31/13 17 22 20 +/- 6 10/31/13 - 11/27/13 16 25 20 +/- 7 10/31/13 - 11/27/13 18 25 22 +/- 5 10/31/13 - 11/27/13 13 27 21 +/- 7 10/31/13 - 11/27/13 13 22 17 +/- 8 11/27/13 - 01/02/14 26 39 31 +/- 8 11/27/13 - 01/02/14 21 39 33 +/- 11 11/27/13 - 01/02/14 24 43 33 +/- 12 11/27/13 - 01/02/14 27 40 33 +/- 13 C-8 01/03/13 - 1/2/2014 8 52 20 +/- 16 01/03/13 - 01/02/14 8 54 21 +/- 17 01/03/13 - 01/02/14 5 57 20 +/- 17 01/03/13 - 01/02/14 7 52 20 +/- 18 Page 49 of 182

Table C-V.3 CONCENTRATIONS OF GAMMA EMITTERS IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2013 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA SITE COLLECTION Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140 La-140 PERIOD L-01 01/03/13 - 04/04/13 < 3 < 5 < 16 < 3 < 10 < 6 < 11 < 3 < 3 < 594 < 260 04/04/13 - 07/04/13 < 4 < 5 < 17 < 3 < 8 < 5 < 12 < 3 < 3 < 448 < 137 07/04/13 - 10/03/13 < 4 < 7 < 21 < 3 < 11 < 6 < 10 < 5 < 3 < 1069 < 256 10/03/13 - 01/02/14 < 2 < 5 < 14 < 2 < 7 < 4 < 9 < 3 < 2 < 286 < 125 MEAN - - - - - - - - - - -

L-03 01/03/13 - 04/04/13 < 4 < 8 < 21 < 3 < 9 < 7 < 11 < 4 < 3 < 670 < 153 04/04/13 - 07/04/13 < 5 < 7 < 35 < 5 < 10 < 10 < 13 < 5 < 4 < 669 < 294 07/04/13 - 10/03/13 < 3 < 4 < 19 < 3 < 9 < 7 < 10 < 3 < 3 < 837 < 308 10/03/13 - 01/02/14 < 3 < 5 < 14 < 3 < 7 < 5 < 10 < 3 < 2 < 298 < 97 MEAN - - - - - - - - - - -

C-9 L-04 01/03/13 - 04/04/13 < 3 < 5 < 18 < 3 < 8 < 7 < 11 < 4 < 3 < 756 < 248 04/04/13 - 07/04/13 < 3 < 5 < 13 < 3 < 8 < 5 < 7 < 3 < 3 < 486 < 208 07/04/13 - 10/03/13 < 3 < 4 < 17 < 3 < 7 < 5 < 8 < 3 < 2 < 776 < 281 10/03/13 - 01/02/14 < 5 < 6 < 22 < 4 < 11 < 9 < 14 < 4 < 4 < 537 < 152 MEAN - - - - - - - - - - -

L-05 01/03/13 - 04/04/13 < 3 < 5 < 17 < 3 < 6 < 7 < 12 < 3 < 2 < 610 < 251 04/04/13 - 07/04/13 < 4 < 5 < 17 < 2 < 8 < 6 < 9 < 3 < 3 < 463 < 165 07/04/13 - 10/03/13 < 3 < 5 < 16 < 2 < 7 < 5 < 8 < 3 < 2 < 769 < 358 10/03/13 - 01/02/14 < 2 < 4 < 12 < 2 < 8 < 4 < 7 < 3 < 2 < 328 < 108 MEAN - - - - - - - - - - -

L-06 01/03/13 - 04/04/13 < 3 < 6 < 16 < 3 < 9 < 6 < 12 < 3 < 2 < 611 < 237 04/04/13 - 07/04/13 < 4 < 7 < 15 < 4 < 9 < 7 < 12 < 4 < 3 < 497 < 175 07/04/13 - 10/03/13 < 4 < 9 < 19 < 5 < 15 < 10 < 16 < 4 < 3 < 902 < 541 10/03/13 - 01/02/14 < 3 < 5 < 18 < 3 < 8 < 6 < 9 < 3 < 3 < 397 < 108 Page 50 of 182 MEAN - - - - - - - - - - -

Table C-V.3 CONCENTRATIONS OF GAMMA EMITTERS IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2013 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA SITE COLLECTION Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140 La-140 PERIOD L-07 01/03/13 - 04/04/13 < 4 < 6 < 19 < 3 < 9 < 7 < 10 < 4 < 3 < 660 < 281 04/04/13 - 07/04/13 < 2 < 4 < 15 < 3 < 5 < 5 < 6 < 2 < 2 < 291 < 182 07/04/13 - 10/03/13 < 4 < 7 < 22 < 3 < 10 < 7 < 12 < 4 < 3 < 978 < 158 10/03/13 - 01/02/14 < 4 < 6 < 20 < 4 < 10 < 6 < 10 < 4 < 3 < 460 < 131 MEAN - - - - - - - - - - -

L-08 01/03/13 - 04/04/13 < 4 < 7 < 18 < 4 < 11 < 7 < 12 < 5 < 4 < 796 < 352 04/04/13 - 07/04/13 < 2 < 3 < 13 < 2 < 6 < 4 < 7 < 2 < 2 < 363 < 185 07/04/13 - 10/03/13 < 2 < 4 < 18 < 2 < 6 < 7 < 9 < 3 < 2 < 869 < 319 10/03/13 - 01/02/14 < 2 < 3 < 10 < 3 < 5 < 5 < 7 < 2 < 2 < 304 < 76 MEAN - - - - - - - - - - -

C-10 L-10 01/03/13 - 04/04/13 < 4 < 5 < 17 < 4 < 9 < 5 < 10 < 4 < 3 < 652 < 299 04/04/13 - 07/04/13 < 3 < 4 < 12 < 2 < 6 < 4 < 7 < 2 < 2 < 369 < 112 07/04/13 - 10/03/13 < 3 < 5 < 22 < 3 < 8 < 9 < 11 < 4 < 3 < 835 < 401 10/03/13 - 01/02/14 < 3 < 4 < 13 < 3 < 4 < 4 < 9 < 3 < 3 < 330 < 158 MEAN - - - - - - - - - - -

L-11 01/03/13 - 04/04/13 < 3 < 5 < 13 < 2 < 9 < 5 < 8 < 3 < 3 < 473 < 213 04/04/13 - 07/04/13 < 3 < 3 < 14 < 2 < 7 < 6 < 11 < 2 < 2 < 430 < 230 07/04/13 - 10/03/13 < 2 < 4 < 19 < 2 < 7 < 4 < 8 < 3 < 2 < 727 < 380 10/03/13 - 01/02/14 < 3 < 4 < 11 < 3 < 7 < 4 < 7 < 2 < 2 < 328 < 149 MEAN - - - - - - - - - - -

Page 51 of 182

Table C-VI.1 CONCENTRATIONS OF I-131 IN AIR IODINE SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2013 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA COLLECTION GROUP I GROUP II GROUP III GROUP IV PERIOD L-03 L-05 L-01 L-06 L-04 L-07 L-08 L-11 L-10 01/03/13 - 01/10/13 < 55 < 55 < 23 < 55 < 55 < 43 < 43 < 43 < 43 01/10/13 - 01/17/13 < 53 < 54 < 53 < 55 < 52 < 53 < 51 < 55 < 33 01/17/13 - 01/24/13 < 45 < 45 < 15 < 45 < 44 < 33 < 33 < 33 < 33 01/24/13 - 01/31/13 < 39 < 39 < 39 < 49 < 39 < 49 < 49 < 19 < 49 01/31/13 - 02/07/13 < 50 < 50 < 21 < 49 < 51 < 47 < 46 < 45 < 46 02/07/13 - 02/14/13 < 56 < 56 < 33 < 55 < 55 < 57 < 57 < 70 < 70 02/14/13 - 02/21/13 < 27 < 27 < 14 < 27 < 27 < 39 < 39 < 39 < 39 02/21/13 - 02/28/13 < 20 < 45 < 44 < 44 < 44 < 49 < 48 < 48 < 48 02/28/13 - 03/07/13 < 38 < 38 < 16 < 38 < 38 < 25 < 25 < 25 < 25 03/07/13 - 03/14/13 < 55 < 55 < 54 < 55 < 54 < 70 < 70 < 70 < 70 03/14/13 - 03/21/13 < 52 < 51 < 31 < 52 < 52 < 61 < 61 < 61 < 61 03/21/13 - 03/27/13 < 46 < 27 < 46 < 46 < 46 < 62 < 62 < 62 < 62 03/27/13 - 04/04/13 < 42 < 42 < 25 < 42 < 42 < 66 < 66 < 66 < 66 04/04/13 - 04/11/13 < 41 < 42 < 41 < 16 < 41 < 29 < 29 < 29 < 29 04/11/13 - 04/18/13 < 65 < 64 < 65 < 27 < 65 < 51 < 51 < 50 < 51 04/18/13 - 04/25/13 < 41 (1) < 44 < 44 < 39 < 44 < 17 < 39 < 39 < 39 04/25/13 - 05/02/13 < 60 < 58 < 24 < 58 < 58 < 41 < 40 < 41 < 41 05/02/13 - 05/09/13 < 65 < 65 < 65 < 65 < 65 < 67 < 28 < 65 < 65 05/09/13 - 05/16/13 < 67 < 67 < 28 < 67 < 67 < 44 < 45 < 45 < 45 05/16/13 - 05/23/13 < 45 < 45 < 45 < 69 < 45 < 69 < 69 < 69 < 29 05/23/13 - 05/30/13 < 52 < 52 < 20 (1) < 52 < 52 < 45 < 46 < 46 < 46 05/30/13 - 06/06/13 < 46 < 46 < 46 < 49 < 46 < 49 < 49 < 21 < 49 06/06/13 - 06/13/13 < 52 < 52 < 20 < 52 < 51 < 40 < 41 < 41 < 41 06/13/13 - 06/20/13 < 63 < 63 < 24 < 63 < 62 < 64 < 65 < 65 < 65 06/20/13 - 06/27/13 < 58 < 58 < 22 < 58 < 58 < 60 < 59 < 59 < 59 06/27/13 - 07/04/13 < 11 < 28 < 28 < 28 < 28 < 34 < 34 < 34 < 34 07/04/13 - 07/11/13 < 65 < 44 (1) < 27 < 68 (1) < 64 < 64 < 64 < 64 < 64 07/11/13 - 07/18/13 < 62 < 62 < 62 < 62 < 24 < 62 < 62 < 62 < 62 07/18/13 - 07/25/13 < 56 < 57 < 22 < 56 < 56 < 52 < 52 < 52 < 52 07/25/13 - 08/01/13 < 70 < 26 < 70 < 70 < 70 < 64 < 70 < 70 < 70 08/01/13 - 08/08/13 < 19 < 20 < 8 < 19 < 19 < 22 < 22 < 22 < 22 08/08/13 - 08/14/13 < 64 < 61 < 63 < 24 < 63 < 56 < 56 < 56 < 56 08/14/13 - 08/22/13 < 46 < 47 < 46 < 57 < 46 < 58 < 58 < 22 < 58 08/22/13 - 08/29/13 < 56 < 56 < 56 < 55 < 56 < 29 < 55 < 55 < 55 08/29/13 - 09/05/13 < 34 < 34 < 13 < 33 < 33 < 29 < 29 < 29 < 29 09/05/13 - 09/12/13 < 35 < 33 < 34 < 39 < 34 < 39 < 17 < 39 < 39 09/12/13 - 09/19/13 < 22 < 22 < 22 < 20 < 22 < 21 < 21 < 9 < 21 09/19/13 - 09/25/13 < 34 < 35 < 34 < 53 < 34 < 56 < 56 < 55 < 22 09/25/13 - 10/03/13 < 44 < 44 < 44 < 24 < 44 < 63 < 61 < 61 < 64 10/03/13 - 10/10/13 < 67 < 67 < 66 < 67 < 66 < 68 < 68 < 28 < 68 10/10/13 - 10/17/13 < 64 < 65 < 25 < 64 < 64 < 65 < 64 < 63 < 63 10/17/13 - 10/23/13 < 62 < 62 < 24 < 62 < 62 < 54 < 54 < 55 < 55 10/23/13 - 10/31/13 < 30 < 30 < 12 < 30 < 30 < 35 < 34 < 34 < 34 10/31/13 - 11/07/13 < 14 < 33 < 33 < 33 < 33 < 37 < 37 < 37 < 37 11/07/13 - 11/14/13 < 64 < 64 < 27 < 64 < 64 < 57 < 57 < 56 < 56 11/14/13 - 11/21/13 < 52 < 52 < 52 < 52 < 22 < 51 < 53 < 52 < 52 11/21/13 - 11/27/13 < 57 < 57 < 31 < 57 < 57 < 69 < 69 < 68 < 69 11/27/13 - 12/05/13 < 28 < 11 < 28 < 28 < 28 < 26 < 26 < 26 < 26 12/05/13 - 12/12/13 < 66 < 66 < 25 < 66 < 66 < 69 < 69 < 69 < 69 12/12/13 - 12/19/13 < 65 < 65 < 65 < 25 < 65 < 65 < 65 < 64 < 65 12/19/13 - 12/26/13 < 41 < 41 < 41 < 42 < 41 < 43 < 43 < 42 < 42 12/26/13 - 01/02/14 < 54 < 54 < 54 < 60 < 54 < 21 < 60 < 60 < 60 MEAN - - - - - - - - -

(1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION C-11 Page 52 of 182

Table C-VII.1 CONCENTRATIONS OF I-131 IN MILK SAMPLES IN THE VICINITY OF LASALLE COUNTY STATION, 2013 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA CONTROL FARM COLLECTION L-42 PERIOD 1/4/2013 < 0.5 02/07/13 < 0.7 03/07/13 < 0.7 04/04/13 < 0.8 05/02/13 < 0.7 05/16/13 < 0.7 05/30/13 < 0.6 06/13/13 < 0.6 06/27/13 < 0.8 07/11/13 < 0.6 07/25/13 < 0.7 08/08/13 < 0.7 08/22/13 < 0.6 09/05/13 < 0.8 09/19/13 < 0.9 10/03/13 < 0.8 10/17/13 < 0.9 10/31/13 < 0.6 11/14/13 < 0.7 12/05/13 < 0.8 MEAN -

C-12 Page 53 of 182

Table C-VII.2 CONCENTRATIONS OF GAMMA EMITTERS IN MILK SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2013 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA SITE COLLECTION Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140 La-140 PERIOD L-42 01/04/13 < 7 < 8 < 20 < 10 < 16 < 8 < 13 < 5 < 7 < 46 < 16 02/07/13 < 5 < 6 < 14 < 7 < 11 < 7 < 10 < 5 < 5 < 39 < 9 03/07/13 < 5 < 6 < 13 < 6 < 13 < 6 < 10 < 5 < 6 < 36 < 7 04/04/13 < 6 < 5 < 14 < 8 < 12 < 6 < 13 < 6 < 6 < 46 < 12 05/02/13 < 5 < 6 < 15 < 7 < 15 < 6 < 11 < 5 < 6 < 40 < 12 05/16/13 < 6 < 7 < 15 < 7 < 14 < 7 < 9 < 5 < 6 < 44 < 13 05/30/13 < 6 < 5 < 13 < 7 < 13 < 5 < 9 < 6 < 6 < 27 < 8 06/13/13 < 6 < 7 < 15 < 8 < 13 < 7 < 11 < 5 < 7 < 28 < 9 06/27/13 < 5 < 6 < 14 < 7 < 13 < 7 < 10 < 6 < 6 < 39 < 10 07/11/13 < 5 < 5 < 11 < 5 < 10 < 5 < 9 < 4 < 5 < 33 < 8 07/25/13 < 6 < 6 < 14 < 7 < 13 < 7 < 11 < 6 < 6 < 44 < 14 08/08/13 < 7 < 7 < 16 < 7 < 15 < 8 < 13 < 6 < 7 < 49 < 13 C-13 08/22/13 < 5 < 5 < 10 < 6 < 10 < 5 < 9 < 5 < 5 < 36 < 8 09/05/13 < 6 < 7 < 16 < 9 < 15 < 7 < 13 < 6 < 6 < 39 < 11 09/19/13 < 6 < 7 < 13 < 8 < 14 < 7 < 11 < 6 < 6 < 42 < 11 10/03/13 < 7 < 7 < 14 < 7 < 15 < 7 < 10 < 5 < 6 < 45 < 8 10/17/13 < 2 < 2 < 6 < 3 < 5 < 3 < 4 < 2 < 2 < 20 < 6 10/31/13 < 7 < 7 < 16 < 7 < 14 < 7 < 14 < 6 < 7 < 42 < 15 11/14/13 < 5 < 6 < 15 < 6 < 12 < 6 < 12 < 4 < 6 < 51 < 14 12/05/13 < 7 < 6 < 17 < 9 < 15 < 6 < 12 < 6 < 7 < 45 < 9 MEAN - - - - - - - - - - -

Page 54 of 182

Table C-VIII.1 CONCENTRATIONS OF GAMMA EMITTERS IN FOOD PRODUCT SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2013 RESULTS IN UNITS OF PCI/KG WET +/- 2 SIGMA SITE COLLECTION Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 I-131 Cs-134 Cs-137 Ba-140 La-140 PERIOD L-CONTROL Potatoes 09/07/13 < 11 < 17 < 38 < 13 < 35 < 15 < 28 < 52 < 11 < 11 < 107 < 19 Swiss Chard 09/07/13 < 13 < 16 < 39 < 19 < 38 < 16 < 25 < 42 < 10 < 13 < 101 < 30 MEAN - - - - - - - - - - - -

L-QUAD 1 Celery root 09/07/13 < 13 < 15 < 39 < 18 < 29 < 12 < 23 < 39 < 12 < 11 < 75 < 34 Kale 09/07/13 < 12 < 15 < 32 < 16 < 30 < 14 < 22 < 42 < 11 < 11 < 76 < 27 MEAN - - - - - - - - - - - -

L-QUAD 2 Beets 09/07/13 < 10 < 14 < 34 < 17 < 31 < 13 < 25 < 41 < 12 < 12 < 101 < 27 Cabbage 09/07/13 < 11 < 11 < 29 < 13 < 27 < 13 < 23 < 42 < 10 < 11 < 87 < 26 C-14 MEAN - - - - - - - - - - - -

L-QUAD 3 Cabbage 09/07/13 < 11 < 11 < 26 < 14 < 25 < 12 < 21 < 34 < 10 < 11 < 81 < 24 Radishes 09/07/13 < 12 < 14 < 35 < 15 < 28 < 14 < 21 < 46 < 13 < 12 < 89 < 18 MEAN - - - - - - - - - - - -

L-QUAD 4 Beet greens 09/07/13 < 9 < 11 < 27 < 15 < 26 < 11 < 19 < 38 < 9 < 10 < 83 < 13 Beets 09/07/13 < 10 < 12 < 30 < 16 < 28 < 13 < 20 < 40 < 9 < 11 < 82 < 23 MEAN - - - - - - - - - - - -

Page 55 of 182

Table C-IX.1 QUARTERLY OSLD RESULTS FOR LASALLE COUNTY STATION, 2013 RESULTS IN UNITS OF MREM/QUARTER +/- 2 STANDARD DEVIATIONS STATION MEAN JAN - MAR APR - JUN JUL - SEP OCT - DEC CODE +/- 2 S.D.

L-01-1 24.8 +/- 2.3 23.4 24.8 24.8 26.2 L-01-2 24.2 +/- 3.6 26.1 23.3 22.1 25.1 L-03-1 21.9 +/- 2.3 22.1 22.0 20.3 23.1 L-03-2 23.2 +/- 1.7 22.7 22.7 24.5 22.9 L-04-1 22.7 +/- 1.5 22.4 21.8 22.8 23.6 L-04-2 22.6 +/- 3.4 22.7 24.8 22.3 20.7 L-05-1 22.4 +/- 1.0 22.5 21.7 22.8 22.6 L-05-2 22.9 +/- 1.1 22.3 23.4 22.6 23.3 L-06-1 23.5 +/- 1.8 22.7 24.7 22.9 23.7 L-06-2 24.0 +/- 2.7 25.3 24.8 22.3 23.5 L-07-1 24.1 +/- 2.2 23.2 24.9 23.0 25.1 L-07-2 23.9 +/- 3.4 23.1 26.2 22.2 23.9 L-08-1 23.1 +/- 1.9 22.8 23.6 21.9 24.1 L-08-2 22.8 +/- 2.0 22.9 23.4 21.4 23.6 L-10-1 20.4 +/- 1.9 20.9 21.3 19.1 20.4 L-10-2 20.7 +/- 2.7 20.5 20.8 19.0 22.3 L-11-1 20.4 +/- 2.5 20.0 22.1 19.2 20.1 L-11-2 20.9 +/- 3.6 20.7 22.7 18.5 21.8 L-101-1 24.3 +/- 4.2 21.3 25.7 24.6 25.7 L-101-2 23.3 +/- 2.3 23.3 24.6 21.8 23.5 L-102-1 25.3 +/- 2.4 25.0 26.7 23.8 25.7 L-102-2 25.8 +/- 1.1 26.3 25.1 26.1 25.6 L-103-1 22.6 +/- 2.0 22.5 23.2 21.3 23.5 L-103-2 23.3 +/- 2.3 23.6 23.9 21.6 24.0 L-104-1 22.2 +/- 4.1 21.6 24.6 19.8 22.9 L-104-2 21.1 +/- 1.2 20.3 21.3 21.2 21.7 L-105-1 23.6 +/- 2.6 22.9 24.3 22.2 25.0 L-105-2 23.5 +/- 0.5 23.3 23.2 23.8 23.5 L-106-1 22.0 +/- 3.3 21.8 23.4 19.7 23.0 L-106-2 21.4 +/- 2.1 22.4 22.0 20.1 21.0 L-107-1 23.0 +/- 2.3 22.6 24.5 21.8 22.9 L-107-2 23.4 +/- 3.3 22.6 24.3 21.6 25.2 L-108-1 24.1 +/- 1.8 24.3 24.9 24.2 22.8 L-108-2 19.5 +/- 3.4 19.6 20.3 17.1 21.0 L-109-1 23.0 +/- 3.6 21.2 24.4 21.6 24.6 L-109-2 23.7 +/- 4.6 24.5 22.9 21.0 26.4 L-110-1 22.8 +/- 1.3 22.8 23.7 22.5 22.2 L-110-2 22.6 +/- 2.8 21.4 23.5 21.3 24.0 L-112-1 22.4 +/- 2.3 22.0 23.8 21.0 22.6 L-112-2 23.9 +/- 1.4 23.6 24.8 23.2 23.8 L-114-1 23.0 +/- 1.2 22.1 22.9 23.5 23.3 L-114-2 22.3 +/- 2.9 22.8 23.0 20.1 23.2 L-115-1 22.1 +/- 4.2 20.8 25.2 20.7 21.8 L-115-2 21.3 +/- 2.6 (1) 22.7 20.9 20.2 (1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION C-15 Page 56 of 182

Table C-IX.1 QUARTERLY OSLD RESULTS FOR LASALLE COUNTY STATION, 2013 RESULTS IN UNITS OF MREM/QUARTER +/- 2 STANDARD DEVIATIONS STATION MEAN JAN - MAR APR - JUN JUL - SEP OCT - DEC CODE +/- 2 S.D.

L-116-1 20.8 +/- 3.2 20.2 21.3 18.9 22.6 L-116-2 22.4 +/- 4.1 20.4 25.2 22.4 21.7 L-201-3 18.4 +/- 3.2 18.8 19.4 16.1 19.4 L-201-4 23.4 +/- 1.2 23.4 22.8 23.1 24.2 L-202-3 20.7 +/- 2.6 20.7 22.2 19.0 21.0 L-202-4 20.2 +/- 3.7 21.0 20.2 17.7 22.0 L-203-1 23.9 +/- 2.2 24.1 23.9 22.4 25.0 L-203-2 22.9 +/- 4.8 23.0 24.2 19.4 24.8 L-204-1 23.2 +/- 2.0 22.1 22.7 24.2 23.9 L-204-2 23.9 +/- 4.4 22.9 26.8 21.6 24.1 L-205-1 23.3 +/- 0.7 23.6 23.5 23.1 22.9 L-205-2 22.8 +/- 1.4 23.4 23.0 21.8 23.1 L-205-3 22.6 +/- 1.8 21.7 22.8 22.2 23.8 L-205-4 23.0 +/- 3.5 22.2 22.4 21.7 25.5 L-206-1 23.6 +/- 1.8 23.3 22.8 23.5 24.9 L-206-2 21.3 +/- 4.7 20.9 22.7 18.2 23.5 L-207-1 22.1 +/- 1.5 21.5 22.8 21.3 22.6 L-207-2 22.8 +/- 2.4 21.1 22.8 23.4 23.8 L-208-1 22.4 +/- 3.1 22.8 23.7 20.7 (1)

L-208-2 24.6 +/- 2.6 24.4 26.3 24.7 23.1 L-209-1 23.1 +/- 1.5 23.4 23.7 22.0 23.3 L-209-2 23.0 +/- 1.0 22.9 23.7 22.6 22.6 L-210-1 24.1 +/- 1.8 23.4 24.6 25.1 23.3 L-210-2 25.0 +/- 3.7 24.5 27.4 22.9 25.2 L-211-1 23.1 +/- 2.0 22.5 22.3 22.9 24.5 L-211-2 23.7 +/- 1.4 22.7 24.3 23.7 23.9 L-212-1 23.9 +/- 4.1 24.2 26.6 21.8 23.1 L-212-2 23.0 +/- 1.7 22.5 24.1 22.1 23.1 L-213-3 23.9 +/- 1.7 22.7 23.9 24.7 24.3 L-213-4 21.5 +/- 2.2 20.3 22.0 20.8 22.7 L-214-3 22.1 +/- 1.2 22.4 22.8 21.6 21.6 L-214-4 20.7 +/- 0.9 20.9 (1) 21.1 20.2 L-215-3 24.5 +/- 1.5 25.2 24.8 24.6 23.4 L-215-4 23.7 +/- 2.7 21.9 24.2 23.7 25.1 L-216-3 23.4 +/- 3.7 21.1 23.8 23.1 25.6 L-216-4 24.7 +/- 2.8 25.1 24.2 23.0 26.3 L-111B-1 23.1 +/- 2.4 21.4 24.0 23.9 23.2 L-111B-2 24.0 +/- 5.1 24.4 26.4 20.4 24.8 L-113A-1 24.8 +/- 2.3 23.9 26.0 23.7 25.5 L-113A-2 24.1 +/- 2.0 24.1 25.5 23.2 23.6 (1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION C-16 Page 57 of 182

TABLE C-IX.2 MEAN QUARTERLY OSLD RESULTS FOR THE INNER RING, OUTER RING, OTHER AND CONTROL LOCATIONS FOR LASALLE COUNTY STATION, 2013 RESULTS IN UNITS OF MREM/QUARTER +/- 2 STANDARD DEVIATION OF THE STATION DATA COLLECTION INNER RING OUTER RING OTHER CONTROL PERIOD +/- 2 S.D.

JAN-MAR 22.5 +/- 3.1 22.5 +/- 2.9 22.8 +/- 2.9 20.7 +/- 0.6 APR-JUN 24.0 +/- 3.0 23.6 +/- 3.3 23.6 +/- 2.7 21.1 +/- 0.7 JUL-SEP 21.8 +/- 3.7 22.1 +/- 4.1 22.1 +/- 3.3 19.1 +/- 0.1 OCT-DEC 23.5 +/- 3.1 23.5 +/- 3.0 23.3 +/- 3.1 21.4 +/- 2.7 TABLE C-IX.3

SUMMARY

OF THE AMBIENT DOSIMETRY PROGRAM FOR LASALLE COUNTY STATION, 2013 RESULTS IN UNITS OF MREM/QUARTER LOCATION SAMPLES PERIOD PERIOD PERIOD MEAN ANALYZED MINIMUM MAXIMUM +/- 2 S.D.

INNER RING 127 17.1 26.7 23.0 +/- 3.6 OUTER RING 134 16.1 27.4 22.9 +/- 3.6 OTHER 64 18.5 26.2 22.9 +/- 3.1 CONTROL 8 19.0 22.3 20.5 +/- 2.2 INNER RING STATIONS - L-101-1, L-101-2, L-102-1, L-102-2, L-103-1, L-103-2, L-104-1, L-104-2, L-105-1, L-105-2, L-106-1, L-106-2, L-107-1, L-107-2, L-108-1, L-108-2, L-109-1, L-109-2, L-110-1, L-110-2, L-111B-1, L-111B-2, L-112-1, L-112-2, L-113A-1, L-113A-2, L-114-1, L-114-2, L-115-1, L-115-2, L-116-1, L-116-2 OUTER RING STATIONS - L-201-3, L-201-4, L-202-3, L-202-4, L-203-1, L-203-2, L-204-1, L-204-2, L-205-1, L-205-2, L-205-3, L-205-4, L-206-1, L-206-2, L-207-1, L-207-2, L-208-1, L-208-2, L-209-1, L-209-2, L-210-1, L-210-2, L-211-1, L-211-2, L-212-1, L-212-2, L-213-3, L-213-4, L-214-3, L-214-4, L-215-3, L-215-4, L-216-3, L-216-4 OTHER STATIONS - L-01-1, L-01-2, L-03-1, L-03-2, L-04-1, L-04-2, L-05-1, L-05-2, L-06-1, L-06-2, L-07-1, L-07-2, L-08-1, L-08-2, L-11-1, L-11-2 CONTROL STATIONS - L-10-1, L-10-2 C-17 Page 58 of 182

FIGURE C-1 Surface Water - Gross Beta - Stations L-21 (C) and L-40 Collected in the Vicinity of LSCS, 2005 - 2013 L-21 (C) Illinois River at Seneca 14.0 12.0 10.0 8.0 pCi/L 6.0 4.0 2.0 0.0 01-27-05 11-10-06 08-23-08 06-06-10 03-19-12 12-31-13 L-40 Illinois River Downstream 12.0 10.0 8.0 pCi/L 6.0 4.0 2.0 0.0 01-27-05 11-10-06 08-23-08 06-06-10 03-19-12 12-31-13 C-18 Page 59 of 182

FIGURE C-2 Surface Water - Tritium - Stations L-21 (C) and L-40 Collected in the Vicinity of LSCS, 2005 - 2013 L-21 Illinois River at Seneca 2000 1600 1200 pCi/L 800 400 0

03-31-05 12-30-06 09-29-08 06-30-10 03-30-12 12-29-13 L-40 Illinois River Downstream 2000 1600 1200 pCi/L 800 400 0

03-31-05 12-30-06 09-29-08 06-30-10 03-30-12 12-29-13 C-19 Page 60 of 182

FIGURE C-3 Air Particulate - Gross Beta - Stations L-01 and L-03 Collected in the Vicinity of LSCS, 2005 - 2013 L-01 Nearsite No. 1 60.0 50.0 40.0 10E-03 pCi/m3 30.0 20.0 10.0 0.0 01-06-05 10-24-06 08-10-08 05-28-10 03-14-12 12-30-13 L-03 Onsite No. 3 60.0 50.0 10E-03 pCi/m3 40.0 30.0 20.0 10.0 0.0 01-06-05 10-24-06 08-10-08 05-28-10 03-14-12 12-30-13 C-20 Page 61 of 182

FIGURE C-4 Air Particulate - Gross Beta - Stations L-05 and L-06 Collected in the Vicinity of LSCS, 2005 - 2013 L-05 Onsite No. 5 60.0 50.0 10E-03 pCi/m3 40.0 30.0 20.0 10.0 0.0 01-06-05 10-24-06 08-10-08 05-28-10 03-14-12 12-30-13 L-06 Nearsite No. 6 70.0 60.0 50.0 10E-03 pCi/m3 40.0 30.0 20.0 10.0 0.0 01-06-05 10-24-06 08-10-08 05-28-10 03-14-12 12-30-13 C-21 Page 62 of 182

FIGURE C-5 Air Particulate - Gross Beta - Station L-10 (C)

Collected in the Vicinity of LSCS, 2005 - 2013 L-10 (C) Streator 60.0 50.0 10E-03 pCi/m3 40.0 30.0 20.0 10.0 0.0 01-06-05 10-24-06 08-10-08 05-28-10 03-14-12 12-30-13 C-22 Page 63 of 182

FIGURE C-6 Air Particulate - Gross Beta - Stations L-04 and L-07 Collected in the Vicinity of LSCS, 2005 - 2013 L-04 Rte. 170 60.0 50.0 10E-03 pCi/m3 40.0 30.0 20.0 10.0 0.0 07-07-05 03-19-07 11-28-08 08-10-10 04-21-12 01-01-14 L-07 Seneca 60.0 50.0 10E-03 pCi/m3 40.0 30.0 20.0 10.0 0.0 07-07-05 03-19-07 11-28-08 08-10-10 04-21-12 01-01-14 C-23 Page 64 of 182

FIGURE C-7 Air Particulate - Gross Beta - Stations L-08 and L-11 Collected in the Vicinity of LSCS, 2005 - 2013 L-08 Marseilles 60.0 50.0 10E-03 pCi/m3 40.0 30.0 20.0 10.0 0.0 07-07-05 03-19-07 11-28-08 08-10-10 04-21-12 01-01-14 L-11 Ransom 60.0 50.0 10E-03 pCi/m3 40.0 30.0 20.0 10.0 0.0 07-07-05 03-19-07 11-28-08 08-10-10 04-21-12 01-01-14 C-24 Page 65 of 182

APPENDIX D INTER-LABORATORY COMPARISON PROGRAM Page 66 of 182

TABLE D-1 ANALYTICS ENVIRONMENTAL RADIOACTIVITY CROSS CHECK PROGRAM TELEDYNE BROWN ENGINEERING, 2013 (PAGE 1 OF 3)

Identification Reported Known Ratio (c)

Month/Year Number Matrix Nuclide Units Value (a) Value (b) TBE/Analytics Evaluation (d)

March 2013 E10477 Milk Sr-89 pCi/L 120 99.7 1.20 A Sr-90 pCi/L 9.21 11.0 0.84 A E10478 Milk I-131 pCi/L 87.1 100 0.87 A Ce-141 pCi/L 186 187 0.99 A Cr-51 pCi/L 463 472 0.98 A Cs-134 pCi/L 201 214 0.94 A Cs-137 pCi/L 262 266 0.98 A Co-58 pCi/L 200 208 0.96 A Mn-54 pCi/L 215 208 1.03 A Fe-59 pCi/L 266 252 1.06 A Zn-65 pCi/L 311 301 1.03 A Co-60 pCi/L 384 400 0.96 A E10480 AP Ce-141 pCi 95.3 95.6 1.00 A Cr-51 pCi 264 241 1.10 A Cs-134 pCi 123 109 1.13 A Cs-137 pCi 142 136 1.04 A Co-58 pCi 112 106 1.06 A Mn-54 pCi 115 106 1.08 A Fe-59 pCi 139 129 1.08 A Zn-65 pCi 163 153 1.07 A Co-60 pCi 212 204 1.04 A E10479 Charcoal I-131 pCi 90.1 92.6 0.97 A E10481 Water Fe-55 pCi/L 1840 1890 0.97 A June 2013 E10564 Milk Sr-89 pCi/L 110 95.0 1.16 A Sr-90 pCi/L 15.8 17.0 0.93 A E10545 Milk I-131 pCi/L 92.6 95.5 0.97 A Ce-141 pCi/L 83.1 90.4 0.92 A Cr-51 pCi/L 253 250 1.01 A Cs-134 pCi/L 118 125 0.94 A Cs-137 pCi/L 143 151 0.95 A Co-58 pCi/L 87.1 94.0 0.93 A Mn-54 pCi/L 171 172 0.99 A Fe-59 pCi/L 125 120 1.04 A Zn-65 pCi/L 220 217 1.01 A Co-60 pCi/L 169 175 0.97 A E10547 AP Ce-141 pCi 56.8 56.7 1.00 A Cr-51 pCi 168 157 1.07 A Cs-134 pCi 85.2 78.4 1.09 A Cs-137 pCi 101 94.6 1.07 A Co-58 pCi 62.7 58.9 1.06 A Mn-54 pCi 125 108 1.16 A Fe-59 pCi 85.7 75.0 1.14 A Zn-65 pCi 169 136 1.24 W Co-60 pCi 116 110 1.05 A E10546 Charcoal I-131 pCi 86.5 89.7 0.96 A D-1 Page 67 of 182

TABLE D-1 ANALYTICS ENVIRONMENTAL RADIOACTIVITY CROSS CHECK PROGRAM TELEDYNE BROWN ENGINEERING, 2013 (PAGE 2 OF 3)

Identification Reported Known Ratio (c)

Month/Year Number Matrix Nuclide Units Value (a) Value (b) TBE/Analytics Evaluation (d)

June 2013 E10549 Water Fe-55 pCi/L 1610 1610 1.00 A September 2013 E10646 Milk Sr-89 pCi/L 63.9 96.0 0.67 N (1)

Sr-90 pCi/L 8.88 13.2 0.67 N (1)

E10647 Milk I-131 pCi/L 93.9 98.3 0.96 A Ce-141 pCi/L NA (2)

Cr-51 pCi/L 272 277 0.98 A Cs-134 pCi/L 150 172 0.87 A Cs-137 pCi/L 125 131 0.95 A Co-58 pCi/L 105 108 0.97 A Mn-54 pCi/L 138 139 0.99 A Fe-59 pCi/L 125 130 0.96 A Zn-65 pCi/L 264 266 0.99 A Co-60 pCi/L 187 196 0.95 A E10672 AP Ce-141 pCi NA (2)

Cr-51 pCi 208 223 0.93 A Cs-134 pCi 143 139 1.03 A Cs-137 pCi 106 105 1.01 A Co-58 pCi 97.0 86.5 1.12 A Mn-54 pCi 116 112 1.04 A Fe-59 pCi 98.6 105 0.94 A Zn-65 pCi 219 214 1.02 A Co-60 pCi 166 158 1.05 A E10648 Charcoal I-131 pCi 76.3 71.7 1.06 A E10673 Water Fe-55 pCi/L 1790 1690 1.06 A December 2013 E10774 Milk Sr-89 pCi/L 97.3 93.8 1.04 A Sr-90 pCi/L 13.3 12.9 1.03 A E10775 Milk I-131 pCi/L 89.7 96.1 0.93 A Ce-141 pCi/L 99.8 110 0.91 A Cr-51 pCi/L 297 297 1.00 A Cs-134 pCi/L 129 142 0.91 A Cs-137 pCi/L 126 126 1.00 A Co-58 pCi/L 116 112 1.04 A Mn-54 pCi/L 167 168 0.99 A Fe-59 pCi/L 117 110 1.06 A Zn-65 pCi/L 757 741 1.02 A Co-60 pCi/L 141 147 0.96 A E10777 AP Ce-141 pCi 85.1 88.0 0.97 A Cr-51 pCi 278 238 1.17 A Cs-134 pCi 123 114 1.08 A Cs-137 pCi 102 101 1.01 A Co-58 pCi 84.4 89.9 0.94 A Mn-54 pCi 132 135 0.98 A Fe-59 pCi 101 88.3 1.14 A Zn-65 pCi 506 595 0.85 A Co-60 pCi 118 118 1.00 A D-2 Page 68 of 182

TABLE D-1 ANALYTICS ENVIRONMENTAL RADIOACTIVITY CROSS CHECK PROGRAM TELEDYNE BROWN ENGINEERING, 2013 (PAGE 3 OF 3)

Identification Reported Known Ratio (c)

Month/Year Number Matrix Nuclide Units Value (a) Value (b) TBE/Analytics Evaluation (d)

December 2013 E10776 Charcoal I-131 pCi 84.7 80.5 1.05 A E10778 Water Fe-55 pCi/L 2010 1910 1.05 A (1) Milk, Sr-89/90 - The failure was due to analyst error. No client samples were affected by this failure. NCR 13-15 (2) The sample was not spiked with Ce-141.

(a) Teledyne Brown Engineering reported result.

(b) 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.

(c) Ratio of Teledyne Brown Engineering to Analytics results.

(d) Analytics evaluation based on TBE internal QC limits: A= Acceptable, reported result falls within ratio limits of 0.80-1.20.

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

D-3 Page 69 of 182

TABLE D-2 ERA ENVIRONMENTAL RADIOACTIVITY CROSS CHECK PROGRAM TELEDYNE BROWN ENGINEERING, 2013 (PAGE 1 OF 1)

Identification Reported Known Acceptance Month/Year Number Media Nuclide Units Value (a) Value (b) Limits Evaluation (c)

May 2013 RAD-93 Water Sr-89 pCi/L 48.3 41.3 31.6 - 48.4 A Sr-90 pCi/L 19.3 23.9 17.2 - 28.0 A Ba-133 pCi/L 81.9 82.1 69.0 - 90.3 A Cs-134 pCi/L 40.9 42.8 34.2 - 47.1 A Cs-137 pCi/L 44.0 41.7 37.0 - 48.8 A Co-60 pCi/L 61.9 65.9 59.3 - 75.0 A Zn-65 pCi/L 202 189 170 - 222 A Gr-A pCi/L 34.2 40.8 21.1 - 51.9 A Gr-B pCi/L 18.0 21.6 13.0 - 29.7 A I-131 pCi/L 23.8 23.8 19.7 - 28.3 A U-Nat pCi/L 60.4 61.2 49.8 - 67.9 A H-3 pCi/L 3970 4050 3450 - 4460 A MRAD-18 Filter Gr-A pCi/filter Lost during processing November 2013 RAD-95 Water Sr-89 pCi/L 25.5 21.9 14.4 - 28.2 A Sr-90 pCi/L 14.3 18.1 12.8 - 21.5 A Ba-133 pCi/L 57.2 54.2 44.7 - 59.9 A Cs-134 pCi/L 83.3 86.7 71.1 - 95.4 A Cs-137 pCi/L 201 206 185 - 228 A Co-60 pCi/L 104 102 91.8 - 114 A Zn-65 pCi/L 361 333 300 - 389 A Gr-A pCi/L 29.5 42.8 22.2 - 54.3 A Gr-B pCi/L 30.1 32.2 20.8 - 39.9 A I-131 pCi/L 23.1 23.6 19.6 - 28.0 A U-Nat pCi/L 5.53 6.24 4.70 - 7.44 A H-3 pCi/L 17650 17700 15500 - 19500 A MRAD-19 Filter Gr-A pCi/filter 33.0 83.0 27.8 - 129 A (a) Teledyne Brown Engineering reported result.

(b) 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.

(c) ERA evaluation: A=acceptable. Reported result falls within the Warning Limits. NA=not acceptable. Reported result falls outside of the Control Limits. CE=check for Error. Reported result falls within the Control Limits and outside of the Warning Limit.

D-4 Page 70 of 182

TABLE D-3 DOE'S MIXED ANALYTE PERFORMANCE EVALUATION PROGRAM (MAPEP)

TELEDYNE BROWN ENGINEERING, 2013 (PAGE 1 OF 2)

Identification Reported Known Acceptance Month/Year Number Media Nuclide Units Value (a) Value (b) Range Evaluation (c)

March 2013 13-MaW28 Water Cs-134 Bq/L 21.0 24.4 17.1 - 31.7 A Cs-137 Bq/L 0.0446 (1) A Co-57 Bq/L 28.3 30.9 21.6 - 40.2 A Co-60 Bq/L 18.2 19.56 13.69 - 25.43 A H-3 Bq/L 506 507 355 - 659 A Mn-54 Bq/L 25.7 27.4 19.2 - 35.6 A K-40 Bq/L 2.09 (1) A Sr-90 Bq/L 10.5 10.5 7.4 - 13.7 A Zn-65 Bq/L 29.2 30.4 21.3 - 39.5 A 13-GrW28 Water Gr-A Bq/L 2.74 2.31 0.69 - 3.93 A Gr-B Bq/L 15.6 13.0 6.5 - 19.5 A 13-MaS28 Soil Cs-134 Bq/kg 859 887 621 - 1153 A Cs-137 Bq/kg 633 587 411 - 763 A Co-57 Bq/kg 0.256 (1) A Co-60 Bq/kg 738 691 484 - 898 A Mn-54 Bq/kg 0.671 (1) A K-40 Bq/kg 714 625.3 437.7 - 812.9 A Sr-90 Bq/kg 442 628 440 - 816 W Zn-65 Bq/kg 1057 995 697 - 1294 A 13-RdF28 AP Cs-134 Bq/sample 1.73 1.78 1.25 - 2.31 A Cs-137 Bq/sample 2.73 2.60 1.82 - 3.38 A Co-57 Bq/sample 2.38 2.36 1.65 - 3.07 A Co-60 Bq/sample 0.0302 (1) A Mn-54 Bq/sample 4.36 4.26 2.98 - 5.54 A Sr-90 Bq/sample 1.43 1.49 1.04 - 1.94 A Zn-65 Bq/sample 3.14 3.13 2.19 - 4.07 A 13-GrF28 AP Gr-A Bq/sample 0.767 1.20 0.36 - 2.04 A Gr-B Bq/sample 0.871 0.85 0.43 - 1.28 A 13-RdV28 Vegetation Cs-134 Bq/sample -0.197 (1) A Cs-137 Bq/sample 7.39 6.87 4.81 - 8.93 A Co-57 Bq/sample 9.87 8.68 6.08 - 11.28 A Co-60 Bq/sample 6.08 5.85 4.10 - 7.61 A Mn-54 Bq/sample -0.0104 (1) A Sr-90 Bq/sample 1.28 1.64 1.15 - 2.13 W Zn-65 Bq/sample 6.84 6.25 4.38 - 8.13 A September 2013 13-MaW29 Water Cs-134 Bq/L 29.1 30.0 21.0 - 39.0 A Cs-137 Bq/L 34.5 31.6 22.1 - 41.1 A Co-57 Bq/L 0.0358 (1) A Co-60 Bq/L 24.6 23.58 16.51 - 30.65 A H-3 Bq/L 2.45 (1) A Mn-54 Bq/L 0.0337 (1) A K-40 Bq/L 0.193 (1) A Sr-90 Bq/L 9.12 7.22 5.05 - 9.39 W Zn-65 Bq/L 38.1 34.6 24.2 - 45.0 A 13-GrW29 Water Gr-A Bq/L 1.13 0.701 0.210 - 1.192 A Gr-B Bq/L 7.61 5.94 2.97 - 8.91 A D-5 Page 71 of 182

TABLE D-3 DOE'S MIXED ANALYTE PERFORMANCE EVALUATION PROGRAM (MAPEP)

TELEDYNE BROWN ENGINEERING, 2013 (PAGE 2 OF 2)

Identification Reported Known Acceptance Month/Year Number Media Nuclide Units Value (a) Value (b) Range Evaluation (c)

September 2013 13-MaS29 Soil Cs-134 Bq/kg 1150 1172 820 - 1524 A Cs-137 Bq/kg 1100 977 684 - 1270 A Co-57 Bq/kg 670 (1) N (2)

Co-60 Bq/kg 502 451 316 - 586 A Mn-54 Bq/kg 758 674 472 - 876 A K-40 Bq/kg 796 633 443 - 823 W Sr-90 Bq/kg 664 460 322 - 598 N (2)

Zn-65 Bq/kg 210 (1) N (2) 13-RdF29 AP Cs-134 Bq/sample -0.570 (1) N (2)

Cs-137 Bq/sample 2.85 2.7 1.9 - 3.5 A Co-57 Bq/sample 3.30 3.4 2.4 - 4.4 A Co-60 Bq/sample 2.41 2.3 1.6 - 3.0 A Mn-54 Bq/sample 3.65 3.5 2.5 - 4.6 A Sr-90 Bq/sample 1.40 1.81 1.27 - 2.35 W Zn-65 Bq/sample 2.90 2.7 1.9 - 3.5 A 13-GrF29 AP Gr-A Bq/sample 0.872 0.9 0.3 - 1.5 A Gr-B Bq/sample 1.57 1.63 0.82 - 2.45 A 13-RdV29 Vegetation Cs-134 Bq/sample 5.29 5.20 3.64 - 6.76 A Cs-137 Bq/sample 7.48 6.60 4.62 - 8.58 A Co-57 Bq/sample 0.0129 (1) A Co-60 Bq/sample 0.0523 (1) A Mn-54 Bq/sample 8.78 7.88 5.52 - 10.24 A Sr-90 Bq/sample 1.63 2.32 1.62 - 3.02 W (2)

Zn-65 Bq/sample 3.18 2.63 1.84 - 3.42 W (1) False positive test.

(2) Soil, Co-57 & Zn-65 identified by gamma software as not detected, MAPEP evaluated as failing the false positive test. A large concentration of Eu-152 was spiked into the sample, causing interference in the analysis. Gamma software recognized the interference and identified them as not detected. MAPEP does not allow clients to enter non-detect designation. NCR 13-04 Soil, Sr incorrect results were submitted to MAPEP. Actual result was 332 bq/kg, which is with the acceptance range. NCR 13-04 AP, Cs-134 - MAPEP evaluated the -0.570 as a failed false positive test. No client samples were affected by these failures. NCR 13-04 Vegetation, Sr it appears that the carrier was double spiked into the sample, resulting in the low activity for this sample. NCR 13-04 (a) Teledyne Brown Engineering reported result.

(b) 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.

(c) DOE/MAPEP evaluation: A=acceptable, W=acceptable with warning, N=not acceptable.

D-6 Page 72 of 182

TABLE D-4 ERA (a) STATISTICAL

SUMMARY

PROFICIENCY TESTING PROGRAM ENVIRONMENTAL, INC., 2013 (Page 1 of 1)

Concentration (pCi/L)

Lab Code Date Analysis Laboratory ERA Control Result (b) Result (c) Limits Acceptance ERW-1593 04/08/13 Sr-89 43.6 +/- 4.3 41.30 31.6 - 48.4 Pass ERW-1593 04/08/13 Sr-90 23.2 +/- 1.7 23.90 17.2 - 28.0 Pass ERW-1596 04/08/13 Ba-133 74.80 4.00 82.10 69.00 90.30 Pass ERW-1596 04/08/13 Co-60 65.50 3.42 65.90 59.30 75.00 Pass ERW-1596 04/08/13 Cs-134 41.10 3.47 42.80 34.20 47.10 Pass ERW-1596 04/08/13 Cs-137 42.30 4.03 41.70 37.00 48.80 Pass ERW-1596 04/08/13 Zn-65 200.3 +/- 10.1 189.0 170.0 - 222.0 Pass ERW-1598 04/08/13 Gr. Alpha 34.30 1.98 40.80 21.10 51.90 Pass ERW-1598 04/08/13 Gr. Beta 18.70 0.98 21.60 13.00 29.70 Pass ERW-1600 04/08/13 I-131 23.00 +/- 1.10 23.80 19.70 - 28.30 Pass ERW-1600 04/08/13 I-131(Gamma) 23.48 +/- 9.44 23.80 19.70 +/- 28.30 Pass ERW-1606 04/08/13 H-3 4041 +/- 194 4050 3450 - 4460 Pass ERW-6009 10/07/13 Sr-89 22.00 2.80 21.90 14.40 28.20 Pass ERW-6009 10/07/13 Sr-90 17.10 2.55 18.10 12.80 21.50 Pass ERW-6012 10/07/13 Ba-133 48.20 4.29 54.20 44.70 59.90 Pass ERW-6012 10/07/13 Co-60 100.8 +/- 4.7 102.0 91.8 - 114.0 Pass ERW-6012 10/07/13 Cs-134 87.30 4.35 86.70 71.10 95.40 Pass ERW-6012 10/07/13 Cs-137 199.6 +/- 7.4 206.0 185.0 - 228.0 Pass ERW-6012 10/07/13 Zn-65 356.2 +/- 13.2 333.0 300.0 - 389.0 Pass ERW-6015 10/07/13 Gr. Alpha 30.70 11.90 42.80 22.20 54.30 Pass ERW-6015 10/07/13 Gr. Beta 25.70 6.48 32.20 20.80 39.90 Pass ERW-6019 10/07/13 I-131 22.50 1.01 23.60 19.60 28.00 Pass ERW-6024 10/07/13 H-3 18397 695 17700 15500 19500 Pass a Results obtained by Environmental, Inc., Midwest Laboratory as a participant in the crosscheck program for proficiency testing in drinking water conducted by Environmental Resources Associates (ERA).

b Unless otherwise indicated, the laboratory result is given as the mean +/- standard deviation for three determinations.

c Results are presented as the known values, expected laboratory precision (1 sigma, 1 determination) and control limits as provided by ERA.

D-7 Page 73 of 182

TABLE D-5 DOE'S MIXED ANALYTE PERFORMANCE EVALUATION PROGRAM (MAPEP)

ENVIRONMENTAL, INC., 2013 (Page 1 of 2)

Concentration (a)

Known Control Lab Code (b) Date Analysis Laboratory result Activity Limits (c) Acceptance MAAP-738 02/01/13 Co-57 2.58 +/- 0.06 2.36 1.65 - 3.07 Pass MAAP-738 02/01/13 Co-60 0.01 +/- 0.03 0.00 0.00 - 0.10 Pass MAAP-738 02/01/13 Cs-134 1.82 +/- 0.13 1.78 1.25 - 2.31 Pass MAAP-738 02/01/13 Cs-137 2.93 +/- 0.10 2.60 1.82 - 3.38 Pass MAAP-738 02/01/13 Mn-54 4.87 +/- 0.13 4.26 2.98 - 5.54 Pass MAAP-738 02/01/13 Sr-90 1.39 +/- 0.14 1.49 1.04 - 1.94 Pass MAAP-738 02/01/13 Zn-65 3.84 +/- 0.20 3.13 2.19 - 4.07 Pass MAAP-738 d 02/01/13 Gr. Alpha 0.14 +/- 0.03 1.20 0.36 - 2.04 Fail (1)

MAAP-738 02/01/13 Gr. Beta 0.93 +/- 0.06 0.85 0.43 - 1.28 Pass MAW-806 02/01/13 Co-57 31.20 0.40 30.90 21.60 40.20 Pass MAW-806 02/01/13 Co-60 19.70 +/- 0.30 16.56 13.69 - 25.43 Pass MAW-806 02/01/13 Cs-134 23.20 +/- 0.50 24.40 17.10 - 31.70 Pass MAW-806 02/01/13 Cs-137 0.03 +/- 0.12 0.00 0.00 - 1.00 Pass MAW-806 02/01/13 Fe-55 34.00 +/- 3.30 44.00 30.80 - 57.20 Pass MAW-806 02/01/13 H-3 511.60 +/- 12.50 507.00 355.00 - 659.00 Pass MAW-806 02/01/13 K-40 2.20 +/- 0.90 0.00 0.00 - 5.00 Pass MAW-806 02/01/13 Mn-54 27.60 +/- 0.50 27.40 19.20 - 35.60 Pass MAW-806 02/01/13 Sr-90 9.30 +/- 0.80 10.50 7.40 - 13.70 Pass MAW-806 02/01/13 Zn-65 31.60 +/- 0.80 30.40 21.30 - 39.50 Pass MAW-811 02/01/13 Gr. Alpha 1.87 +/- 0.09 2.31 0.69 - 3.93 Pass MAW-811 02/01/13 Gr. Beta 13.04 +/- 0.13 13.00 6.50 - 19.50 Pass MASO-739 02/01/13 Co-57 0.60 +/- 0.50 0.00 0.00 - 5.00 Pass MASO-739 02/01/13 Co-60 739.20 +/- 28.50 691.00 484.00 - 898.00 Pass MASO-739 02/01/13 Cs-134 863.30 +/- 34.10 887.00 621.00 - 1153.00 Pass MASO-739 02/01/13 Cs-137 661.80 +/- 25.70 587.00 411.00 - 763.00 Pass MASO-739 02/01/13 K-40 745.80 +/- 33.30 625.30 437.70 - 812.90 Pass MASO-739 02/01/13 Mn-54 1.10 +/- 1.00 0.00 0.00 - 5.00 Pass MASO-739 02/01/13 Zn-65 1109.60 +/- 44.10 995.00 697.00 - 1294.00 Pass MASO-744 e 02/01/13 Sr-90 408.40 +/- 14.00 628.00 440.00 - 816.00 Fail (2)

MAVE-747 02/01/13 Co-57 10.37 +/- 0.17 8.68 6.08 - 11.28 Pass MAVE-747 02/01/13 Co-60 6.48 +/- 0.17 5.85 4.10 - 7.61 Pass MAVE-747 02/01/13 Cs-134 0.02 +/- 0.04 0.00 0.00 - 0.10 Pass MAVE-747 02/01/13 Cs-137 7.79 +/- 0.21 6.87 4.81 - 8.93 Pass MAVE-747 02/01/13 Mn-54 0.00 +/- 0.05 0.00 0.00 - 0.10 Pass MAVE-747 02/01/13 Zn-65 7.29 +/- 0.33 6.25 4.38 - 8.13 Pass MASO-5043 f 08/01/13 Co-57 699.60 +/- 3.90 0.00 0.00 - 5.00 Fail (3)

MASO-5043 08/01/13 Cs-134 1191.70 +/- 23.00 1172.00 820.00 - 1524.00 Pass MASO-5043 08/01/13 Cs-137 1072.00 +/- 5.10 977.00 684.00 - 1270.00 Pass MASO-5043 08/01/13 K-40 760.00 +/- 16.20 633.00 443.00 - 823.00 Pass MASO-5043 08/01/13 Mn-54 753.80 +/- 4.90 674.00 472.000 - 876.000 Pass D-8 Page 74 of 182

TABLE D-5 DOE'S MIXED ANALYTE PERFORMANCE EVALUATION PROGRAM (MAPEP)

ENVIRONMENTAL, INC., 2013 (Page 2 of 2)

Concentration (a)

Known Control Lab Code (b) Date Analysis Laboratory result Activity Limits (c) Acceptance MASO-5043 08/01/13 Sr-90 383.90 +/- 14.50 460.00 322.00 - 598.00 Pass MASO-5043 08/01/13 Zn-65 -351.50 +/- 5.50 0.00 0.00 - 0.00 Pass MAW-5094 08/01/13 Co-57 0.01 +/- 0.09 0.00 0.00 - 5.00 Pass MAW-5094 08/01/13 Co-60 23.20 +/- 0.32 23.58 16.51 - 30.65 Pass MAW-5094 08/01/13 Cs-134 27.60 +/- 0.58 30.40 21.00 - 39.00 Pass MAW-5094 08/01/13 Cs-137 32.31 +/- 0.52 31.60 22.10 - 41.10 Pass MAW-5094 08/01/13 Fe-55 39.20 +/- 3.50 53.30 37.30 - 69.30 Pass MAW-5094 08/01/13 Gr. Alpha 0.54 +/- 0.05 0.70 0.21 - 1.19 Pass MAW-5094 08/01/13 Gr. Beta 5.85 +/- 0.09 5.94 2.97 - 8.91 Pass MAW-5094 08/01/13 H-3 1.20 +/- 3.00 0.00 0.00 - 5.00 Pass MAW-5094 08/01/13 K-40 2.22 +/- 0.90 0.00 0.00 - 5.00 Pass MAW-5094 08/01/13 Mn-54 0.010 +/- 0.11 0.00 0.00 - 5.00 Pass MAW-5094 08/01/13 Sr-90 6.40 +/- 0.60 7.22 5.05 - 9.39 Pass MAW-5094 08/01/13 Zn-65 35.30 +/- 0.90 34.60 24.20 - 45.00 Pass MAVE-5046 08/01/13 Co-57 0.01 +/- 0.03 0.00 0.00 - 0.00 Pass MAVE-5046 08/01/13 Co-60 0.00 +/- 0.04 0.00 0.00 - 0.00 Pass MAVE-5046 08/01/13 Cs-134 5.71 +/- 0.23 5.20 3.64 - 6.76 Pass MAVE-5046 08/01/13 Cs-137 7.64 +/- 0.20 6.60 4.62 - 8.58 Pass MAVE-5046 08/01/13 Mn-54 9.08 +/- 0.24 7.88 5.52 - 10.24 Pass MAVE-5046 08/01/13 Zn-65 2.92 +/- 0.25 2.63 1.84 - 3.42 Pass MAAP-5046 08/01/13 Co-57 3.48 +/- 0.14 3.40 1.90 - 3.50 Pass MAAP-5046 08/01/13 Co-60 2.44 +/- 0.08 3.40 1.60 - 3.00 Pass MAAP-5046 08/01/13 Cs-134 0.01 +/- 0.03 0.00 0.02 - 0.04 Pass MAAP-5046 08/01/13 Cs-137 3.09 +/- 0.13 2.70 1.90 - 3.50 Pass MAAP-5046 08/01/13 Gr. Alpha 0.28 +/- 0.04 0.90 0.27 - 1.53 Pass MAAP-5046 08/01/13 Gr. Beta 1.90 +/- 0.08 1.63 0.82 - 2.45 Pass MAAP-5046 08/01/13 Mn-54 3.95 +/- 0.12 3.50 2.50 - 4.60 Pass MAAP-5046 08/01/13 Sr-90 1.69 +/- 4.10 1.81 1.27 - 2.35 Pass MAAP-5046 08/01/13 Zn-65 3.27 +/- 0.18 2.70 2.50 - 4.60 Pass a Results are reported in units of Bq/kg (soil), Bq/L (water) or Bq/total sample (filters, vegetation).

b Laboratory codes as follows: MAW (water), MAAP (air filter), MASO (soil), MAVE (vegetation).

c MAPEP results are presented as the known values and expected laboratory precision (1 sigma, 1 determination) and control limits as defined by the MAPEP. A known value of "zero" indicates an analysis was included in the testing series as a "false positive". MAPEP does not provide control limits.

(1) The filter was recounted overnight, no significant alpha activity could be detected.

(2) The sample was reanalyzed using additional fuming nitric separations. Result of reanalysis: 574.4 +/- 35.2 Bq/kg.

(3) Interference from Eu-152 resulted in misidentification of Co-57.

D-9 Page 75 of 182

APPENDIX E EFFLUENT DATA Page 76 of 182

TABLE OF CONTENTS INTRODUCTION ................................................................................................................. 1

SUMMARY

........................................................................................................................... 2 1.0. EFFLUENTS ..................................................................................................... 3 1.1. Gaseous Effluents to the Atmosphere .................................................. 3 1.2. Liquids Released to Illinois River........................................................... 3 2.0. SOLID RADIOACTIVE WASTE ....................................................................... 3 3.0. DOSE TO MAN................................................................................................. 3 3.1. Gaseous Effluent Pathways .................................................................. 3 3.1.1. Noble Gases ............................................................................ 4 3.1.1.1. Gamma Dose Rates.................................................. 4 3.1.1.2. Beta Air and Skin Dose Rate .................................... 4 3.1.2. Radioactive Iodine ................................................................... 5 3.1.2.1. Dose to Thyroid ......................................................... 5 3.2. Liquid Effluent Pathways ....................................................................... 5 3.3. Assessment of Dose to Member of Public ............................................ 5 4.0. SITE METEOROLOGY .................................................................................... 6 i

Page 77 of 182

Table of Contents (cont.)

APPENDIX E-1 DATA TABLES AND FIGURES ............................................................. E-1.1 Station Releases Table 1.1-1 Gaseous Effluents Summation of all Releases ............................ E-1.2 Table 1.2-1 Summation of all Liquid Releases................................................ E-1.3 Table 2.0-1 Solid Radwaste Annual Report .................................................... E-1.4 Table 3.1-1 Maximum Doses Resulting from Airborne Releases.................... E-1.5 Table 3.2-1 Maximum Doses Resulting from Liquid Effluents.......................... E-1.6 Table 3.3.1 10CFR20 Compliance Assessment .............................................. E-1.7 Table 3.4-1 Maximum Doses Resulting from Airborne Releases Based On Concurrent Meteorological Data ............................................. E-1.8 ii Page 78 of 182

INTRODUCTION LaSalle County Station, a two-unit BWR, is located near Marseilles, Illinois in LaSalle County, 3.5 miles south of the Illinois River. Both units are rated at 3546 MWt. Unit 1 loaded fuel in March 1982. Unit 2 loaded fuel in late December 1983. The Station is designed to keep releases to the environment at levels below those specified in the regulations.

Liquid effluents, although no longer released from LaSalle County Station, were designed to be released to the Illinois River in controlled batches after radioassay of each batch. Gaseous effluents are released to the atmosphere after delay allowing time for short-lived (noble) gases to decay. Releases to the atmosphere are sampled and analyzed on a routine basis. The gaseous effluent samples are analyzed for particulate, iodine, noble gas, and tritium activity. The particulate and iodine sample results are obtained from continuously collected composite samples. The noble gas and tritium sample results are obtained from routine grab samples. The results of effluent analyses are summarized on a monthly basis and reported to the Nuclear Regulatory Commission as required per Technical Specifications. Airborne concentrations of noble gases, tritium, I-131, and particulate radioactivity in offsite areas are calculated using effluent and meteorological data.

Environmental monitoring is conducted by sampling at indicator and control (background) locations in the vicinity of LaSalle County Station to measure changes in radiation or radioactivity levels that may be attributable to station operations. If significant changes attributable to LaSalle County Station are measured, these changes are correlated with effluent releases. External gamma radiation exposure from noble gases and internal dose from I-131 in milk are the critical pathways at this site; however, an environmental monitoring program is conducted which also includes these and many other pathways which are less significant in terms of radiation protection.

1 Page 79 of 182

SUMMARY

Gaseous effluents for the period contributed to only a small fraction of the LaSalle County Station Radiological Effluent Controls Limits. Liquid effluents had no contribution to offsite dose, as no liquid radioactive discharges were conducted. Calculations of environmental concentrations based on effluent, Illinois River flow, and meteorological data for the period indicate that consumption by the public of radionuclides attributable to LaSalle County Station does not exceed regulatory limits. Radiation exposure from radionuclides released to the atmosphere represented the critical pathway for the period with a maximum individual total dose estimated to be 1.05E+00 mrem for the year, where a shielding and occupancy factor of 0.7 is assumed. The assessment of radiation doses is performed in accordance with the Offsite Dose Calculation Manual (ODCM), specifically, a comparison of preoperational studies with operational controls or with previous environmental surveillance reports and an assessment of the observed impacts of the plant operation on the environment.

Control locations are basis for preoperational data. The results of analysis confirm that the station is operating in compliance with 10CFR50 Appendix I, 10CFR20 and 40CFR190.

2 Page 80 of 182

1.0 EFFLUENTS 1.1 Gaseous Effluents to the Atmosphere Measured concentrations of noble gases, radioiodine, and particulate radioactivity released to the atmosphere during the year, are listed in Table 1.1-1. A total of 1.55E+03 curies of fission and activation gases were released with an average release rate of 9.38E+01 µCi/sec.

A total of 6.29E-02 curies of I-131 were released during the year with an average release rate of 1.99E-03 µCi/sec.

A total of 1.59E-02 curies of beta-gamma emitters were released as airborne particulate matter with an average release rate of 5.05E-04 µCi/sec. Alpha-emitting radionuclides were below the lower limit of detection (LLD). Carbon-14 released in 2013 was calculated separately with a total of 3.37E+01 curies released with an average release rate of 1.07E+00 µCi/sec.

A total of 5.75E+00 curies of tritium were released with an average release rate of 4.01E-01 µCi/sec.

1.2 Liquids Released to Illinois River There were no liquid batch releases in 2013. Continuous release path activity was below applicable Lower Limits of Detection.

2.0 SOLID RADIOACTIVE WASTE Solid radioactive wastes were shipped by truck to a disposal facility or to a waste processor. For further detail, refer the LaSalle 2013 Annual Radioactive Effluent Release Report (ARERR). This report was submitted to the USNRC by the required date of May 1st, 2014.

3.0 DOSE TO MAN 3.1 Gaseous Effluent Pathways Table 3.1-1 summarizes the doses resulting from releases of airborne radioactivity via the different exposure pathways.

3 Page 81 of 182

3.1.1 Noble Gases 3.1.1.1 Gamma Dose Rates Unit 1 and Unit 2 gaseous releases at LaSalle County Station are reported as Unit 1 releases due to a single station vent stack (SVS) release point. Offsite Gamma air and whole body dose rates are shown in Table 3.1-1 and were calculated based on measured release rates, isotopic composition of the noble gases and average meteorological data for the period.

Doses based on concurrent meteorological data are shown in Table 3.4-1. Based on measured effluents and meteorological data, the maximum total body dose to an individual would be 1.29E-02 mrem (Table 3.1-1) for the year, with an occupancy or shielding factor of 0.7 included. The maximum total body dose based on measured effluents and concurrent meteorological data would be 1.70E-02 mrem (Table 3.4-1).

The maximum gamma air dose was 1.94E-02 mrad from Table 3.1-1, and the maximum gamma air dose from concurrent meterorological data was 2.47E-03 mrad (Table 3.4-1).

3.1.1.2 Beta Air and Skin Rates The range of beta particles in air is relatively small (on the order of a few meters or less);

consequently, plumes of gaseous effluents may be considered "infinite" for purpose of calculating the dose from beta radiation incident on the skin.

However, the actual dose to sensitive skin tissues is difficult to calculate due to the effect of the beta particle energies, thickness of inert skin and clothing covering sensitive tissues. For purposes of this report the skin is taken to have a thickness of 7.0 mg/cm2 and an occupancy factor of 1.0 is used. The skin dose (from beta and gamma radiation) for the year was 2.18E-02 mrem from Table 3.1-1, and the skin dose from concurrent meteorological data was 2.42E-03 mrem (Table 3.4-1). The maximum offsite beta dose for the 4

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year was 9.26E-04 mrad from Table 3.1-1, and the maximum offsite beta dose from concurrent meteorological data was 6.96E-04 mrad (Table 3.4-1).

3.1.2 Radioactive Iodine The human thyroid exhibits a significant capacity to concentrate ingested or inhaled iodine. The radioiodine, I-131, released during routing operation of the plant, may be made available to man resulting in a dose to the thyroid.

The principal pathway of interest for this radionuclide is ingestion of radioiodine in milk.

3.1.2.1 Dose to Thyroid The hypothetical thyroid dose to a maximum exposed individual living near the station via ingestion of milk was calculated. The radionuclide considered was I-131 and the source of milk was taken to be the nearest dairy farm with the cows pastured from May through October. The maximum thyroid does due to I-131 was 3.10E-01 mrem for the year.

3.2 Liquid Effluent Pathways The three principal pathways through the aquatic environment for potential doses to man from liquid waste are ingestion of potable water, eating aquatic foods, and exposure while on the shoreline.

Not all of these pathways are significant or applicable at a given time but a reasonable approximation of the dose can be made by adjusting the dose formula for season of the year or type and degree of use of the aquatic environment. NRC developed equations* were used to calculate the doses to the whole body, lower gastro-intestinal tracts, thyroid, bone and skin; specific parameters for use in the equations are given in the Offsite Dose Calculation Manual. The maximum whole body dose was 0.00E+00 mrem and organ dose was 0.00E+00 for the year mrem (Table 3.2-1).

3.3 Assessment of Dose to Member of Public During the period January to December 2013, LaSalle County Station did not exceed these limits as shown in Table 3.1-1 and 5

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Table 3.2-1 (based on annual average meteorological data), and as shown in Table 3.3-1:

The Radiological Effluent Technical Standards (RETS) limits on dose or dose commitment to an individual due to radioactive materials in liquid effluents from each reactor unit (1.5 mrem to the whole body or 5 mrem to any organ during any calendar year; 3 mrem to the whole body or 10 mrem to any organ during the calendar year).

The RETS limits on air dose in noble gases released in gaseous effluents to a member of the public from each reactor unit (5 mrad for gamma radiation or 10 mrad for beta radiation during any calendar quarter; 10 mrads for gamma radiation or 20 mrad for beta radiation during a calendar year).

The RETS limits on dose to a member of the public due to iodine-131, iodine-133, tritium and radionuclides in particulate form with half-lives greater than eight days in gaseous effluents released from each reactor unit (7.5 mrem to any organ during any calendar quarter; 15 mrem to any organ during any calendar year).

The 10CFR20 limit on Total Effective Dose Equivalent to individual members of the public (100 mrem).

4.0 SITE METEOROLOGY A summary of the site meteorological measurements taken during each calendar quarter of the year is given in Appendix F. The data are presented as cumulative joint frequency distributions of the wind direction for the 375 level and wind speed class by atmospheric stability class determined from the temperature difference between the 375 and 33 levels. Data recovery for these measurements was 99.7% during 2013.

Nuclear Regulatory Commission, Regulatory Guide 1.109 (Rev. 1) 6 Page 84 of 182

APPENDIX E-1 DATA TABLES AND FIGURES E - 1.1 Page 85 of 182

Table 1.1-1 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2013)

UNIT 1 AND UNIT 2 DOCKET NUMBERS 50-373 AND 50-374 GASEOUS EFFLUENTS SUMMATION OF ALL RELEASES Est. Total A. Fission & Activation Gases Unit Quarter 1 Quarter 2 Quarter 3 Quarter4 Error %

1. Total Release Ci 3.17E+02 1.56E+02 4.67E+02 6.14E+02 2.50E+01

2. Average release rate for the period µCi/sec 4.02E+01 1.98E+02 5.92E+01 7.79E+01

3. Percent of ODCM limit % * * *

B. Iodine

1. Total Iodine - 131 Ci 2.53E-02 4.74E-03 7.63E-03 2.52E-02 1.50E+01

2. Average release rate for the period µCi/sec 3.20E-03 6.02E-04 9.67E-04 3.20E-03

3. Percent of ODCM limit % * * *

C. Particulates

1. Particulates with half-lives > 8 days Ci 4.40E-03 1.83E-03 3.09E-03 6.61E-03 3.50E+01

2. Average release rate for the period µCi/sec 5.66E-04 2.32E-04 3.89E-04 8.32E-04

3. Percent of ODCM limit % * * *

D. Tritium

1. Total Release Ci 2.41E-01 3.60E-01 1.56E+00 3.59E+00 1.50E+01

2. Average release rate for the period µCi/sec 1.30E+00 2.27E-01 5.91E-02 1.65E-02

3. Percent of ODCM limit % * * *

E. Gross Alpha

1. Total Release Ci <LLD <LLD <LLD <LLD 3.50E+01

2. Average release rate for the period µCi/sec <LLD <LLD <LLD <LLD

3. Percent of ODCM limit % * * *

F. Carbon-14

1. Total Release Ci 8.42E+00 8.43E+00 8.42E+00 8.42E+00

2. Average release rate for the period µCi/sec 1.08E+00 1.07E+00 1.06E+00 1.06E+00

3. Percent of ODCM limit % * * * *

"*" This information is contained in the Radiological Impact on Man section of the report.

"<" Indicates activity of sample is less than LLD given in µCi/ml E-1.2 Page 86 of 182

Table 1.2-1 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2013)

LIQUID RELEASES UNIT 1 AND UNIT 2 SUMMATION OF ALL LIQUID RELEASES Quarter Quarter Quarter Est. Total Error A. Fission & Activation Products Unit Quarter4 1 2 3 %

1. Total Release (not including tritium, Ci <LLD <LLD <LLD <LLD N/A gases & alpha)

2. Average diluted concentration during

µCi/mL <LLD <LLD <LLD <LLD period

3. Percent of applicable limit % * * *

B. Tritium

1. Total Release Ci <LLD <LLD <LLD <LLD N/A

2. Average diluted concentration during

µCi/mL <LLD <LLD <LLD <LLD period

3. Percent of applicable limit % * * *

C. Dissolved & Entrained Gases

1. Total Release Ci <LLD <LLD <LLD <LLD N/A

2. Average diluted concentration during

µCi/mL <LLD <LLD <LLD <LLD period

3. Percent of applicable limit % * * *

D. Gross Alpha Activity

1. Total Release Ci <LLD <LLD <LLD <LLD N/A

2. Average release rate for the period µCi/mL <LLD <LLD <LLD <LLD

3. Percent of ODCM limit % * * *

E. Volume of Waste Released (prior to Liters 0.00E+00 0.00E+00 0.00E+00 0.00E+00 dilution)

F. Volume of Dilution Water Used Liters 0.00E+00 0.00E+00 0.00E+00 0.00E+00 During Period

"*" This information is contained in the Radiological Impact on Man section of the report.

"<" Indicates activity of sample is less than LLD given in µCi/ml E-1.3 Page 87 of 182

Table 2.1-1 SOLID RADWASTE ANNUAL REPORT LaSalle County Station Table 2.1-1 deliberately deleted. For solid waste disposal detail, refer to the LaSalle County Station 2013 Annual Radiological Effluent Release Report (ARERR).

E-1.4 Page 88 of 182

Table 3.1-1 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2013)

RADIOLOGICAL IMPACT ON MAN MAXIMUM DOSES RESULTING FROM GASEOUS RELEASES AND COMPLIANCE STATUS rd Quarterly 1st % of 2nd % of 3 % of 4th % of Annual % of Units Infant Receptor Limit Quarter Limit Quarter Limit Quarter Limit Quarter Limit Limit Limit Gamma Air 5.00E+00 mRad 3.84E-03 0.08 2.22E-03 0.04 6.33E-03 0.13 6.98E-03 0.14 1.00E+01 0.19 Beta Air 1.00E+01 mRad 1.98E-04 0.00 9.52E-05 0.00 2.85E-04 0.00 3.48E-04 0.00 2.00E+01 0.01 NG Total Body 2.50E+00 mRem 2.56E-03 0.10 1.48E-03 0.06 4.22E-03 0.17 4.66E-03 0.19 5.00E+00 0.26 NG Skin 7.50E+00 mRem 4.33E-03 0.06 2.49E-03 0.03 7.12E-03 0.09 7.86E-03 0.11 1.50E+01 0.15 NNG Organ 7.50E+00 mRem 1.24E-01 1.65 2.43E-02 0.32 3.82E-02 0.51 1.24E-01 1.65 1.50E+01 2.07 rd Quarterly 1st % of 2nd % of 3 % of 4th % of Annual % of Units Child Receptor Limit Quarter Limit Quarter Limit Quarter Limit Quarter Limit Limit Limit Gamma Air 5.00E+00 mRad 3.84E-03 0.08 2.22E-03 0.04 6.33E-03 0.13 6.98E-03 0.14 1.00E+01 0.19 Beta Air 1.00E+01 mRad 1.98E-04 0.00 9.52E-05 0.00 2.85E-04 0.00 3.48E-04 0.00 2.00E+01 0.01 NG Total Body 2.50E+00 mRem 2.56E-03 0.10 1.48E-03 0.06 4.22E-03 0.17 4.66E-03 0.19 5.00E+00 0.26 NG Skin 7.50E+00 mRem 4.33E-03 0.06 2.49E-03 0.03 7.12E-03 0.09 7.86E-03 0.11 1.50E+01 0.15 E-1.5 NNG Organ 7.50E+00 mRem 5.11E-02 0.68 1.01E-02 0.13 1.59E-02 0.21 5.11E-02 0.68 1.50E+01 0.85 rd Teenager Quarterly 1st % of 2nd % of 3 % of 4th % of Annual % of Units Receptor Limit Quarter Limit Quarter Limit Quarter Limit Quarter Limit Limit Limit Gamma Air 5.00E+00 mRad 3.84E-03 0.08 2.22E-03 0.04 6.33E-03 0.13 6.98E-03 0.14 1.00E+01 0.19 Beta Air 1.00E+01 mRad 1.98E-04 0.00 9.52E-05 0.00 2.85E-04 0.00 3.48E-04 0.00 2.00E+01 0.01 NG Total Body 2.50E+00 mRem 2.56E-03 0.10 1.48E-03 0.06 4.22E-03 0.17 4.66E-03 0.19 5.00E+00 0.26 NG Skin 7.50E+00 mRem 4.33E-03 0.06 2.49E-03 0.03 7.12E-03 0.09 7.86E-03 0.11 1.50E+01 0.15 NNG Organ 7.50E+00 mRem 2.58E-02 0.34 5.07E-03 0.07 7.98E-03 0.11 2.58E-02 0.34 1.50E+01 0.43 rd Quarterly 1st % of 2nd % of 3 % of 4th % of Annual % of Units Adult Receptor Limit Quarter Limit Quarter Limit Quarter Limit Quarter Limit Limit Limit Gamma Air 5.00E+00 mRad 3.84E-03 0.08 2.22E-03 0.04 6.33E-03 0.13 6.98E-03 0.14 1.00E+01 0.19 Beta Air 1.00E+01 mRad 1.98E-04 0.00 9.52E-05 0.00 2.85E-04 0.00 3.48E-04 0.00 2.00E+01 0.01 NG Total Body 2.50E+00 mRem 2.56E-03 0.10 1.48E-03 0.06 4.22E-03 0.17 4.66E-03 0.19 5.00E+00 0.26 NG Skin 7.50E+00 mRem 4.33E-03 0.06 2.49E-03 0.03 7.12E-03 0.09 7.86E-03 0.11 1.50E+01 0.15 NNG Organ 7.50E+00 mRem 1.63E-02 0.22 3.19E-03 0.04 5.03E-03 0.07 1.63E-02 0.22 1.50E+01 0.27 The LaSalle County Nuclear Power Station maximum expected annual dose from Carbon-14 has been calculated using the maximum gross thermal capacity at full power operation. The resultant bounding Page 89 of 182 doses are based upon site specific assumptions of source term.

Table 3.2-1 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2013)

RADIOLOGICAL IMPACT ON MAN MAXIMUM DOSES RESULTING FROM LIQUID RELEASES AND COMPLIANCE STATUS rd Infant Quarterly 1st % of 2nd % of 3 % of 4th % of Annual % of Units Receptor Limit Quarter Limit Quarter Limit Quarter Limit Quarter Limit Limit Limit 10CFR50 Appendix I compliance Total Body 1.50E+00 mRem 0.00E+00 0.00 0.00E+00 0.00 0.00E+00 0.00 0.00E+00 0.00 3.00E+00 0.00 Organ 5.00E+00 mRem 0.00E+00 0.00 0.00E+00 0.00 0.00E+00 0.00 0.00E+00 0.00 1.00E+01 0.00 40CFR141 compliance (nearest public drinking water)

Total Body mRem 0.00E+00 0.00E+00 0.00E+00 0.00E+00 4.00E+00 0.00 Organ mRem 0.00E+00 0.00E+00 0.00E+00 0.00E+00 4.00E+00 0.00 rd Child Quarterly 1st % of 2nd % of 3 % of 4th % of Annual % of Units Receptor Limit Quarter Limit Quarter Limit Quarter Limit Quarter Limit Limit Limit 10CFR50 Appendix I compliance Total Body 1.50E+00 mRem 0.00E+00 0.00 0.00E+00 0.00 0.00E+00 0.00 0.00E+00 0.00 3.00E+00 0.00 Organ 5.00E+00 mRem 0.00E+00 0.00 0.00E+00 0.00 0.00E+00 0.00 0.00E+00 0.00 1.00E+01 0.00 40CFR141 compliance (nearest public drinking water)

E-1.6 Total Body mRem 0.00E+00 0.00E+00 0.00E+00 0.00E+00 4.00E+00 0.00 Organ mRem 0.00E+00 0.00E+00 0.00E+00 0.00E+00 4.00E+00 0.00 rd Teenager Quarterly 1st % of 2nd % of 3 % of 4th % of Annual % of Units Receptor Limit Quarter Limit Quarter Limit Quarter Limit Quarter Limit Limit Limit 10CFR50 Appendix I compliance Total Body 1.50E+00 mRem 0.00E+00 0.00 0.00E+00 0.00 0.00E+00 0.00 0.00E+00 0.00 3.00E+00 0.00 Organ 5.00E+00 mRem 0.00E+00 0.00 0.00E+00 0.00 0.00E+00 0.00 0.00E+00 0.00 1.00E+01 0.00 40CFR141 compliance (nearest public drinking water)

Total Body mRem 0.00E+00 0.00E+00 0.00E+00 0.00E+00 4.00E+00 0.00 Organ mRem 0.00E+00 0.00E+00 0.00E+00 0.00E+00 4.00E+00 0.00 rd Adult Quarterly 1st % of 2nd % of 3 % of 4th % of Annual % of Units Receptor Limit Quarter Limit Quarter Limit Quarter Limit Quarter Limit Limit Limit 10CFR50 Appendix I compliance Total Body 1.50E+00 mRem 0.00E+00 0.00 0.00E+00 0.00 0.00E+00 0.00 0.00E+00 0.00 3.00E+00 0.00 Organ 5.00E+00 mRem 0.00E+00 0.00 0.00E+00 0.00 0.00E+00 0.00 0.00E+00 0.00 1.00E+01 0.00 40CFR141 compliance (nearest public drinking water)

Page 90 of 182 Total Body mRem 0.00E+00 0.00E+00 0.00E+00 0.00E+00 4.00E+00 0.00 Organ mRem 0.00E+00 0.00E+00 0.00E+00 0.00E+00 4.00E+00 0.00

Table 3.3-1 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2013)

RADIOLOGICAL IMPACT ON MAN MAXIMUM DOSES RESULTING FROM RELEASES AND COMPLIANCE STATUS 10CFR20 / 40CFR190 Compliance st nd rd th 1 2 3 4 %

Quarter Quarter Quarter Quarter Annual Annual Annual Dose Dose Dose Dose Dose Limit Limit (mRem) (mRem) (mRem) (mRem) (mRem) (mRem/yr)

Unit 1 40CFR190 Compliance Ex U1 D 9.93E-02 8.53E-02 1.00E-01 1.03E-01 3.88E-01 25 1.55 10CFR20 Compliance Tot U1 D 2.23E-01 1.10E-01 1.39E-01 2.27E-01 6.98E-01 100 0.70 40CFR190 Compliance Bone 7.18E-03 6.89E-03 6.94E-03 7.19E-03 2.82E-02 25 0.11 Liver 1.86E-03 1.54E-03 1.59E-03 1.87E-03 6.87E-03 25 0.03 Thyroid 1.24E-01 2.43E-02 3.82E-02 1.24E-01 3.10E-01 75 0.41 Kidney 1.93E-03 1.56E-03 1.61E-03 1.93E-03 7.03E-03 25 0.03 Lung 1.49E-03 1.47E-03 1.48E-03 1.49E-03 5.93E-03 25 0.02 GI-LLI 1.50E-03 1.48E-03 1.48E-03 1.51E-03 5.97E-03 25 0.02 Unit 2 40CFR190 Compliance Ex U2 D 7.07E-02 8.37E-02 9.57E-02 9.86E-02 3.49E-01 25 1.39 10CFR20 Compliance Tot U2 D 7.07E-02 8.37E-02 9.57E-02 9.86E-02 3.49E-01 100 0.35 40CFR190 Compliance Bone 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 25 0.00 Liver 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 25 0.00 Thyroid 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 75 0.00 Kidney 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 25 0.00 Lung 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 25 0.00 GI-LLI 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 25 0.00 E-1.7 Page 91 of 182

Table 3.4-1 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2013)

RADIOLOGICAL IMPACT ON MAN MAXIMUM GAMMA AIR DOSE E-1.8 Page 92 of 182

APPENDIX F METEOROLOGICAL DATA Page 93 of 182

LaSalle County Generating Station Period of Record: January - March 2013 Stability Class - Extremely Unstable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 S 0 0 0 0 0 0 0 SSW 0 0 0 0 0 0 0 SW 0 0 0 0 0 0 0 WSW 0 0 0 0 0 0 0 W 0 0 0 0 0 0 0 WNW 0 0 0 0 0 0 0 NW 0 0 0 1 0 0 1 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 0 0 1 0 0 1 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 F-1 Page 94 of 182

LaSalle County Generating Station Period of Record: January - March 2013 Stability Class - Moderately Unstable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 S 0 0 2 1 0 0 3 SSW 0 0 0 0 0 0 0 SW 0 0 0 0 0 0 0 WSW 0 0 0 1 0 0 1 W 0 0 0 3 0 0 3 WNW 0 0 0 0 1 0 1 NW 0 0 0 2 0 0 2 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 0 2 7 1 0 10 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 F-2 Page 95 of 182

LaSalle County Generating Station Period of Record: January - March 2013 Stability Class - Slightly Unstable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 1 0 0 1 ESE 0 0 1 0 0 0 1 SE 0 0 0 0 0 0 0 SSE 0 1 1 0 0 0 2 S 0 2 0 1 0 0 3 SSW 0 0 1 3 2 0 6 SW 0 0 1 0 0 0 1 WSW 0 0 1 1 2 0 4 W 0 0 0 5 0 0 5 WNW 0 0 5 3 4 0 12 NW 0 0 2 3 1 0 6 NNW 0 0 0 1 0 0 1 Variable 0 0 0 0 0 0 0 Total 0 3 12 18 9 0 42 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 F-3 Page 96 of 182

LaSalle County Generating Station Period of Record: January - March 2013 Stability Class - Neutral - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 8 44 41 0 0 94 NNE 0 10 12 2 0 0 24 NE 2 2 6 10 5 0 25 ENE 2 8 15 21 12 3 61 E 0 4 13 24 9 1 51 ESE 2 7 6 13 1 0 29 SE 1 7 12 10 1 0 31 SSE 1 3 9 9 0 1 23 S 0 5 4 5 1 0 15 SSW 1 10 21 8 11 2 53 SW 0 7 18 12 5 0 42 WSW 1 12 14 29 10 0 66 W 0 16 26 34 15 3 94 WNW 0 15 68 85 37 8 213 NW 0 13 57 33 3 0 106 NNW 0 15 78 93 9 0 195 Variable 1 0 0 0 0 0 1 Total 12 142 403 429 119 18 1123 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 F-4 Page 97 of 182

LaSalle County Generating Station Period of Record: January - March 2013 Stability Class - Slightly Stable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 20 6 0 0 0 27 NNE 7 13 0 0 0 0 20 NE 3 3 1 1 0 0 8 ENE 2 2 4 8 0 0 16 E 1 13 4 5 1 0 24 ESE 2 8 17 10 0 0 37 SE 1 5 27 16 2 0 51 SSE 1 4 12 21 3 0 41 S 1 2 4 12 6 3 28 SSW 5 6 13 28 19 0 71 SW 3 10 6 24 11 0 54 WSW 1 5 19 20 1 5 51 W 3 15 18 11 9 12 68 WNW 4 20 40 14 40 33 151 NW 4 13 14 2 2 1 36 NNW 1 5 8 3 0 0 17 Variable 0 0 0 0 0 0 0 Total 40 144 193 175 94 54 700 Hours of calm in this stability class: 1 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 F-5 Page 98 of 182

LaSalle County Generating Station Period of Record: January - March 2013 Stability Class - Moderately Stable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 4 0 0 0 0 4 NNE 1 2 0 0 0 0 3 NE 0 0 0 0 0 0 0 ENE 0 1 0 0 0 0 1 E 0 8 7 0 0 0 15 ESE 0 7 4 1 0 0 12 SE 1 4 7 3 0 0 15 SSE 1 1 2 1 0 0 5 S 0 2 2 2 0 0 6 SSW 0 4 17 5 0 0 26 SW 0 5 8 3 3 0 19 WSW 0 9 13 6 0 0 28 W 0 8 13 2 1 0 24 WNW 0 10 1 1 0 1 13 NW 0 2 0 0 0 0 2 NNW 0 5 1 0 0 0 6 Variable 0 0 0 0 0 0 0 Total 3 72 75 24 4 1 179 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 F-6 Page 99 of 182

LaSalle County Generating Station Period of Record: January - March 2013 Stability Class - Extremely Stable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 1 0 0 0 0 1 E 0 7 8 0 0 0 15 ESE 1 10 0 0 0 0 11 SE 1 4 5 2 0 0 12 SSE 0 2 3 0 0 0 5 S 0 1 0 1 0 0 2 SSW 0 5 13 0 0 0 18 SW 0 6 8 0 0 0 14 WSW 0 7 2 0 0 0 9 W 0 4 2 0 0 0 6 WNW 0 6 2 0 0 0 8 NW 0 0 0 0 0 0 0 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 2 53 43 3 0 0 101 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 F-7 Page 100 of 182

LaSalle County Generating Station Period of Record: January - March 2013 Stability Class - Extremely Unstable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 S 0 0 0 0 0 0 0 SSW 0 0 0 0 0 0 0 SW 0 0 0 0 0 0 0 WSW 0 0 0 0 0 0 0 W 0 0 0 0 0 0 0 WNW 0 0 0 0 1 0 1 NW 0 0 0 0 0 0 0 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 0 0 0 1 0 1 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 F-8 Page 101 of 182

LaSalle County Generating Station Period of Record: January - March 2013 Stability Class - Moderately Unstable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 S 0 0 0 0 0 0 0 SSW 0 0 0 0 0 0 0 SW 0 0 0 0 0 0 0 WSW 0 0 0 0 0 0 0 W 0 0 0 0 0 0 0 WNW 0 0 0 0 1 0 1 NW 0 0 0 0 0 1 1 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 0 0 0 1 1 2 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 F-9 Page 102 of 182

LaSalle County Generating Station Period of Record: January - March 2013 Stability Class - Slightly Unstable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 S 0 0 0 0 1 0 1 SSW 0 0 0 0 0 0 0 SW 0 0 0 0 0 0 0 WSW 0 0 0 0 1 0 1 W 0 0 0 0 1 0 1 WNW 0 0 0 0 0 0 0 NW 0 0 0 0 2 0 2 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 0 0 0 5 0 5 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 F-10 Page 103 of 182

LaSalle County Generating Station Period of Record: January - March 2013 Stability Class - Neutral - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 4 7 51 24 2 88 NNE 2 4 7 6 3 1 23 NE 0 3 6 9 7 3 28 ENE 1 1 10 12 21 16 61 E 3 2 11 6 18 15 55 ESE 2 6 2 7 14 2 33 SE 0 4 2 16 4 1 27 SSE 1 5 8 13 6 0 33 S 1 6 7 5 4 1 24 SSW 0 6 12 14 8 24 64 SW 0 5 9 16 10 9 49 WSW 1 5 7 25 22 14 74 W 0 5 17 27 36 31 116 WNW 1 9 30 75 57 71 243 NW 2 12 39 53 60 15 181 NNW 0 12 24 39 29 15 119 Variable 1 0 0 0 0 0 1 Total 15 89 198 374 323 220 1219 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 72 Hours of missing stability measurements in all stability classes: 3 F-11 Page 104 of 182

LaSalle County Generating Station Period of Record: January - March 2013 Stability Class - Slightly Stable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 5 7 2 1 0 15 NNE 0 11 4 3 0 0 18 NE 0 5 10 1 1 0 17 ENE 0 5 9 4 4 1 23 E 1 1 6 3 0 0 11 ESE 0 5 2 15 6 5 33 SE 2 4 2 13 14 10 45 SSE 0 5 3 6 25 22 61 S 0 2 5 1 5 25 38 SSW 2 5 4 5 12 47 75 SW 0 3 2 12 4 32 53 WSW 1 7 4 11 14 23 60 W 8 2 6 10 21 35 82 WNW 1 5 8 30 5 44 93 NW 0 5 6 20 5 1 37 NNW 2 1 6 5 7 0 21 Variable 0 0 0 0 0 0 0 Total 17 71 84 141 124 245 682 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 6 Hours of missing stability measurements in all stability classes: 3 F-12 Page 105 of 182

LaSalle County Generating Station Period of Record: January - March 2013 Stability Class - Moderately Stable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 2 1 0 0 3 NNE 0 0 1 0 0 0 1 NE 0 1 1 0 0 0 2 ENE 0 1 0 0 0 0 1 E 1 1 3 0 0 0 5 ESE 0 2 7 5 2 0 16 SE 0 0 2 5 2 2 11 SSE 0 1 1 2 3 5 12 S 0 1 0 1 2 7 11 SSW 0 0 0 2 3 1 6 SW 0 0 3 4 9 6 22 WSW 1 0 5 9 1 6 22 W 0 1 6 2 5 2 16 WNW 0 0 1 5 2 0 8 NW 0 0 3 3 0 0 6 NNW 0 0 5 0 0 0 5 Variable 0 0 0 0 0 0 0 Total 2 8 40 39 29 29 147 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 F-13 Page 106 of 182

LaSalle County Generating Station Period of Record: January - March 2013 Stability Class - Extremely Stable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 1 3 0 0 4 SE 0 0 0 2 0 0 2 SSE 0 0 1 2 0 0 3 S 0 0 0 0 0 0 0 SSW 0 0 0 1 0 0 1 SW 0 0 0 2 1 1 4 WSW 0 0 0 1 3 0 4 W 0 1 0 0 0 0 1 WNW 0 0 0 0 0 0 0 NW 1 0 2 1 0 0 4 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 1 1 4 12 4 1 23 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 F-14 Page 107 of 182

LaSalle County Generating Station Period of Record: April - June 2013 Stability Class - Extremely Unstable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 2 4 1 0 0 7 NNE 0 0 3 0 0 0 3 NE 0 0 1 2 0 0 3 ENE 0 0 0 5 0 0 5 E 0 0 0 0 0 0 0 ESE 0 0 2 4 1 0 7 SE 0 1 1 2 1 0 5 SSE 0 0 1 0 0 0 1 S 0 0 1 1 0 0 2 SSW 0 1 1 4 4 0 10 SW 0 1 0 5 0 0 6 WSW 0 1 1 0 0 0 2 W 0 0 2 0 0 0 2 WNW 0 0 1 0 0 0 1 NW 0 0 0 0 0 0 0 NNW 0 3 1 1 0 0 5 Variable 0 0 0 0 0 0 0 Total 0 9 19 25 6 0 59 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 2 F-15 Page 108 of 182

LaSalle County Generating Station Period of Record: April - June 2013 Stability Class - Moderately Unstable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 3 7 4 0 0 14 NNE 0 1 7 2 0 0 10 NE 0 2 5 6 1 0 14 ENE 0 1 2 3 1 0 7 E 0 0 3 2 0 0 5 ESE 0 0 4 2 1 0 7 SE 0 1 1 2 4 0 8 SSE 0 0 1 1 2 1 5 S 0 0 2 5 2 0 9 SSW 0 1 0 8 0 0 9 SW 0 0 2 10 4 0 16 WSW 0 0 2 3 1 4 10 W 0 0 3 4 1 1 9 WNW 0 0 2 7 0 0 9 NW 0 1 1 4 0 0 6 NNW 0 0 5 0 0 0 5 Variable 0 0 0 0 0 0 0 Total 0 10 47 63 17 6 143 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 2 F-16 Page 109 of 182

LaSalle County Generating Station Period of Record: April - June 2013 Stability Class - Slightly Unstable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 3 16 5 0 0 24 NNE 0 8 7 2 0 0 17 NE 0 2 10 19 2 0 33 ENE 0 0 2 8 1 1 12 E 0 0 1 3 1 0 5 ESE 0 1 7 4 1 0 13 SE 0 1 2 4 3 0 10 SSE 0 0 4 3 0 0 7 S 0 0 5 5 4 1 15 SSW 0 1 9 9 1 0 20 SW 1 0 6 7 3 0 17 WSW 0 0 5 6 3 0 14 W 0 4 12 4 2 0 22 WNW 0 2 13 13 0 0 28 NW 0 0 8 9 3 0 20 NNW 0 1 10 4 0 0 15 Variable 0 0 0 0 0 0 0 Total 1 23 117 105 24 2 272 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 2 F-17 Page 110 of 182

LaSalle County Generating Station Period of Record: April - June 2013 Stability Class - Neutral - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 19 20 1 0 0 40 NNE 0 29 32 1 0 0 62 NE 0 15 35 17 1 0 68 ENE 0 21 24 27 2 0 74 E 0 14 23 8 4 0 49 ESE 0 13 24 7 0 0 44 SE 3 16 9 8 1 0 37 SSE 0 3 16 5 4 0 28 S 4 17 21 23 15 3 83 SSW 2 18 30 24 3 1 78 SW 2 7 20 25 5 0 59 WSW 2 11 32 11 3 3 62 W 2 11 40 21 20 2 96 WNW 1 10 27 13 5 0 56 NW 1 11 10 6 1 0 29 NNW 0 8 17 17 3 0 45 Variable 1 1 0 0 0 0 2 Total 18 224 380 214 67 9 912 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 2 F-18 Page 111 of 182

LaSalle County Generating Station Period of Record: April - June 2013 Stability Class - Slightly Stable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 19 10 0 0 0 30 NNE 1 14 9 0 0 0 24 NE 0 5 14 2 0 0 21 ENE 1 2 9 5 0 0 17 E 4 20 41 15 0 0 80 ESE 0 13 8 4 0 0 25 SE 0 6 5 7 0 0 18 SSE 0 2 5 15 3 0 25 S 1 10 16 18 6 1 52 SSW 2 11 21 9 3 2 48 SW 2 7 12 5 0 0 26 WSW 1 5 9 10 3 0 28 W 1 8 12 3 1 1 26 WNW 0 7 11 4 8 0 30 NW 0 2 21 2 0 0 25 NNW 1 8 6 0 0 0 15 Variable 0 1 0 0 0 0 1 Total 15 140 209 99 24 4 491 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 2 F-19 Page 112 of 182

LaSalle County Generating Station Period of Record: April - June 2013 Stability Class - Moderately Stable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 5 0 0 0 0 5 NNE 0 0 0 0 0 0 0 NE 2 0 0 0 0 0 2 ENE 1 1 0 0 0 0 2 E 1 10 11 0 0 0 22 ESE 1 22 3 0 0 0 26 SE 1 12 8 0 0 0 21 SSE 2 2 3 1 0 0 8 S 2 14 10 2 0 0 28 SSW 1 6 14 1 1 0 23 SW 1 4 14 5 0 0 24 WSW 1 9 2 0 0 0 12 W 0 10 2 0 0 0 12 WNW 0 5 7 0 0 0 12 NW 0 2 1 0 0 0 3 NNW 0 4 1 0 0 0 5 Variable 0 0 0 0 0 0 0 Total 13 106 76 9 1 0 205 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 2 F-20 Page 113 of 182

LaSalle County Generating Station Period of Record: April - June 2013 Stability Class - Extremely Stable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 5 0 0 0 0 5 NNE 0 1 0 0 0 0 1 NE 1 0 0 0 0 0 1 ENE 0 0 0 0 0 0 0 E 1 4 0 0 0 0 5 ESE 0 8 0 0 0 0 8 SE 0 19 6 0 0 0 25 SSE 0 9 7 0 0 0 16 S 0 8 3 0 0 0 11 SSW 0 3 4 0 0 0 7 SW 0 1 0 0 0 0 1 WSW 0 1 0 0 0 0 1 W 0 7 1 0 0 0 8 WNW 0 8 0 0 0 0 8 NW 0 1 0 0 0 0 1 NNW 0 2 0 0 0 0 2 Variable 0 0 0 0 0 0 0 Total 2 77 21 0 0 0 100 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 2 F-21 Page 114 of 182

LaSalle County Generating Station Period of Record: April - June 2013 Stability Class - Extremely Unstable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 S 0 0 0 0 0 0 0 SSW 0 0 0 0 0 0 0 SW 0 0 0 0 0 0 0 WSW 0 0 0 0 0 0 0 W 0 0 0 0 0 0 0 WNW 0 0 0 0 0 0 0 NW 0 0 0 0 0 0 0 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 0 0 0 0 0 0 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 2 F-22 Page 115 of 182

LaSalle County Generating Station Period of Record: April - June 2013 Stability Class - Moderately Unstable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 1 0 0 1 NNE 0 0 0 0 0 0 0 NE 0 0 0 2 1 0 3 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 0 1 0 1 SE 0 0 0 0 1 0 1 SSE 0 0 0 0 0 0 0 S 0 0 0 0 0 0 0 SSW 0 0 0 0 1 2 3 SW 0 0 0 0 1 1 2 WSW 0 0 0 0 0 0 0 W 0 0 0 0 0 0 0 WNW 0 0 0 0 0 0 0 NW 0 0 0 0 0 0 0 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 0 0 3 5 3 11 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 2 F-23 Page 116 of 182

LaSalle County Generating Station Period of Record: April - June 2013 Stability Class - Slightly Unstable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 1 3 1 0 5 NNE 0 1 3 3 1 0 8 NE 0 0 0 5 2 0 7 ENE 0 0 0 1 0 0 1 E 0 0 0 1 0 0 1 ESE 0 0 1 2 1 0 4 SE 0 0 1 5 5 0 11 SSE 0 0 0 0 1 1 2 S 0 0 0 2 3 1 6 SSW 0 0 1 2 11 4 18 SW 0 0 2 3 1 2 8 WSW 0 0 0 1 0 2 3 W 0 0 0 0 1 1 2 WNW 0 0 0 4 3 0 7 NW 0 0 0 0 4 0 4 NNW 0 0 1 0 0 0 1 Variable 0 0 0 0 0 0 0 Total 0 1 10 32 34 11 88 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 2 F-24 Page 117 of 182

LaSalle County Generating Station Period of Record: April - June 2013 Stability Class - Neutral - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 6 23 22 10 1 62 NNE 0 8 34 27 8 3 80 NE 0 11 34 46 43 3 137 ENE 0 13 17 21 31 8 90 E 0 7 18 14 16 9 64 ESE 1 6 19 15 8 1 50 SE 0 8 9 17 15 0 49 SSE 0 3 14 18 6 3 44 S 2 6 20 16 22 34 100 SSW 1 4 15 18 31 29 98 SW 0 6 8 23 31 11 79 WSW 1 5 14 27 23 12 82 W 1 8 22 36 29 27 123 WNW 0 10 24 27 11 3 75 NW 0 7 12 26 21 7 73 NNW 0 0 13 30 8 0 51 Variable 1 1 0 0 0 0 2 Total 7 109 296 383 313 151 1259 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 2 F-25 Page 118 of 182

LaSalle County Generating Station Period of Record: April - June 2013 Stability Class - Slightly Stable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 3 0 6 6 8 0 23 NNE 1 2 9 16 4 0 32 NE 0 1 3 15 2 1 22 ENE 0 1 6 12 6 2 27 E 1 5 7 18 24 3 58 ESE 0 1 9 11 9 2 32 SE 0 4 2 9 9 6 30 SSE 0 7 2 6 4 10 29 S 0 1 4 13 18 33 69 SSW 0 3 11 17 21 28 80 SW 0 1 8 20 10 8 47 WSW 0 4 4 12 8 7 35 W 0 1 6 8 7 12 34 WNW 0 3 8 9 6 13 39 NW 0 2 2 19 13 5 41 NNW 0 1 3 3 3 0 10 Variable 0 1 0 0 0 0 1 Total 5 38 90 194 152 130 609 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 2 F-26 Page 119 of 182

LaSalle County Generating Station Period of Record: April - June 2013 Stability Class - Moderately Stable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 1 1 0 2 0 4 NNE 0 0 0 2 1 0 3 NE 0 1 1 2 2 0 6 ENE 0 1 4 1 0 0 6 E 0 2 1 3 6 1 13 ESE 0 0 3 10 4 3 20 SE 0 0 5 10 7 4 26 SSE 0 0 3 8 10 1 22 S 0 0 3 13 7 3 26 SSW 0 1 6 11 4 2 24 SW 0 0 3 7 4 0 14 WSW 0 1 1 2 0 0 4 W 0 0 1 0 0 0 1 WNW 0 0 6 9 0 0 15 NW 0 1 5 1 3 0 10 NNW 0 0 0 1 0 0 1 Variable 0 0 0 0 0 0 0 Total 0 8 43 80 50 14 195 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 2 F-27 Page 120 of 182

LaSalle County Generating Station Period of Record: April - June 2013 Stability Class - Extremely Stable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 0 0 0 NNE 0 1 0 0 0 0 1 NE 0 0 0 0 0 0 0 ENE 0 0 1 0 0 0 1 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 1 0 1 SSE 0 0 1 3 1 0 5 S 0 0 1 3 1 2 7 SSW 0 0 2 1 0 0 3 SW 0 0 0 0 0 0 0 WSW 0 0 0 0 0 0 0 W 0 0 0 0 0 0 0 WNW 0 1 0 0 0 0 1 NW 0 1 0 0 0 0 1 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 3 5 7 3 2 20 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 2 F-28 Page 121 of 182

LaSalle County Generating Station Period of Record: July - September 2013 Stability Class - Extremely Unstable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 S 0 0 1 1 0 0 2 SSW 0 0 6 3 0 0 9 SW 0 0 8 1 0 0 9 WSW 0 0 2 2 0 0 4 W 0 0 1 2 0 0 3 WNW 0 0 1 7 0 0 8 NW 0 0 1 2 0 0 3 NNW 0 1 0 0 0 0 1 Variable 0 0 0 0 0 0 0 Total 0 1 20 18 0 0 39 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 F-29 Page 122 of 182

LaSalle County Generating Station Period of Record: July - September 2013 Stability Class - Moderately Unstable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 1 2 0 0 0 3 NNE 0 0 2 0 0 0 2 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 1 0 0 1 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 2 0 0 0 0 2 S 0 0 2 0 0 0 2 SSW 0 4 7 1 0 0 12 SW 0 5 14 1 0 0 20 WSW 0 4 18 8 0 0 30 W 0 4 3 1 0 0 8 WNW 0 1 2 5 0 0 8 NW 0 4 2 1 0 0 7 NNW 0 2 3 2 0 0 7 Variable 0 0 0 0 0 0 0 Total 0 27 55 20 0 0 102 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 F-30 Page 123 of 182

LaSalle County Generating Station Period of Record: July - September 2013 Stability Class - Slightly Unstable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 6 7 1 0 0 14 NNE 0 1 4 0 0 0 5 NE 0 1 8 0 0 0 9 ENE 0 0 8 0 0 0 8 E 0 4 11 0 0 0 15 ESE 0 2 9 0 0 0 11 SE 0 1 1 1 0 0 3 SSE 0 7 4 0 0 0 11 S 0 4 8 0 0 0 12 SSW 0 9 8 2 0 0 19 SW 0 16 8 3 0 0 27 WSW 0 8 11 4 0 0 23 W 0 13 15 0 0 0 28 WNW 0 8 11 3 0 0 22 NW 0 3 14 2 0 0 19 NNW 0 8 9 7 0 0 24 Variable 0 0 0 0 0 0 0 Total 0 91 136 23 0 0 250 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 F-31 Page 124 of 182

LaSalle County Generating Station Period of Record: July - September 2013 Stability Class - Neutral - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 3 20 20 2 0 0 45 NNE 0 41 20 4 0 0 65 NE 3 20 28 3 0 0 54 ENE 1 22 30 7 0 0 60 E 0 27 28 0 0 0 55 ESE 1 26 26 0 0 0 53 SE 0 18 11 2 0 0 31 SSE 6 16 7 3 0 0 32 S 3 14 11 0 0 0 28 SSW 1 25 12 2 0 0 40 SW 2 25 24 5 0 0 56 WSW 2 16 26 8 0 0 52 W 0 16 3 4 0 0 23 WNW 1 12 8 2 0 0 23 NW 0 7 11 1 0 0 19 NNW 1 14 26 7 0 0 48 Variable 1 0 0 0 0 0 1 Total 25 319 291 50 0 0 685 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 F-32 Page 125 of 182

LaSalle County Generating Station Period of Record: July - September 2013 Stability Class - Slightly Stable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 37 10 0 0 0 49 NNE 0 24 9 0 0 0 33 NE 2 6 11 1 0 0 20 ENE 1 11 26 4 0 0 42 E 1 31 27 0 0 0 59 ESE 3 10 3 0 0 0 16 SE 1 7 0 0 0 0 8 SSE 2 5 3 0 0 0 10 S 2 16 11 0 0 0 29 SSW 1 14 17 0 0 0 32 SW 4 21 33 1 0 0 59 WSW 0 14 36 4 0 0 54 W 2 18 7 1 0 0 28 WNW 2 15 15 0 0 0 32 NW 1 14 5 0 0 0 20 NNW 0 7 9 0 0 0 16 Variable 1 0 0 0 0 0 1 Total 25 250 222 11 0 0 508 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 F-33 Page 126 of 182

LaSalle County Generating Station Period of Record: July - September 2013 Stability Class - Moderately Stable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 9 0 0 0 0 11 NNE 1 0 0 0 0 0 1 NE 3 1 0 0 0 0 4 ENE 0 2 1 0 0 0 3 E 2 36 15 0 0 0 53 ESE 3 27 1 0 0 0 31 SE 4 16 1 0 0 0 21 SSE 3 16 0 0 0 0 19 S 1 20 1 0 0 0 22 SSW 5 25 9 0 0 0 39 SW 5 25 23 0 0 0 53 WSW 4 14 7 4 0 0 29 W 3 6 4 0 0 0 13 WNW 7 11 0 1 0 0 19 NW 3 3 0 0 0 0 6 NNW 2 10 0 0 0 0 12 Variable 0 0 0 0 0 0 0 Total 48 221 62 5 0 0 336 Hours of calm in this stability class: 1 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 F-34 Page 127 of 182

LaSalle County Generating Station Period of Record: July - September 2013 Stability Class - Extremely Stable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 0 0 0 0 0 1 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 2 14 2 0 0 0 18 ESE 1 27 0 0 0 0 28 SE 0 29 0 0 0 0 29 SSE 1 22 0 0 0 0 23 S 1 23 0 0 0 0 24 SSW 0 70 15 0 0 0 85 SW 0 34 1 0 0 0 35 WSW 3 12 0 0 0 0 15 W 0 17 1 0 0 0 18 WNW 1 4 0 0 0 0 5 NW 1 2 0 0 0 0 3 NNW 1 2 0 0 0 0 3 Variable 0 0 0 0 0 0 0 Total 12 256 19 0 0 0 287 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 F-35 Page 128 of 182

LaSalle County Generating Station Period of Record: July - September 2013 Stability Class - Extremely Unstable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 S 0 0 0 0 0 0 0 SSW 0 0 0 0 0 0 0 SW 0 0 0 0 0 0 0 WSW 0 0 0 0 0 0 0 W 0 0 0 0 0 0 0 WNW 0 0 0 0 0 0 0 NW 0 0 0 0 0 0 0 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 0 0 0 0 0 0 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 F-36 Page 129 of 182

LaSalle County Generating Station Period of Record: July - September 2013 Stability Class - Moderately Unstable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 1 0 0 1 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 S 0 0 0 0 1 0 1 SSW 0 0 2 2 0 2 6 SW 0 0 1 2 1 0 4 WSW 0 0 0 2 0 0 2 W 0 0 0 0 0 0 0 WNW 0 0 0 2 2 0 4 NW 0 0 0 0 3 0 3 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 0 3 9 7 2 21 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 F-37 Page 130 of 182

LaSalle County Generating Station Period of Record: July - September 2013 Stability Class - Slightly Unstable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 1 0 0 0 1 NNE 0 0 2 1 0 0 3 NE 0 0 1 1 0 0 2 ENE 0 0 1 1 0 0 2 E 0 0 1 0 0 0 1 ESE 0 0 1 0 0 0 1 SE 0 0 0 0 0 0 0 SSE 0 0 0 1 0 0 1 S 0 0 1 2 0 0 3 SSW 0 1 14 1 1 1 18 SW 0 1 13 6 1 0 21 WSW 0 3 5 5 2 0 15 W 0 2 4 2 0 0 8 WNW 0 0 2 2 4 0 8 NW 0 0 1 4 1 0 6 NNW 0 0 1 3 1 0 5 Variable 0 0 0 0 0 0 0 Total 0 7 48 29 10 1 95 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 F-38 Page 131 of 182

LaSalle County Generating Station Period of Record: July - September 2013 Stability Class - Neutral - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 10 30 15 2 1 59 NNE 0 17 28 19 7 3 74 NE 1 12 25 30 4 2 74 ENE 0 18 13 35 6 0 72 E 1 10 39 10 0 0 60 ESE 0 14 35 11 0 0 60 SE 0 16 12 9 0 0 37 SSE 2 7 21 10 0 0 40 S 1 11 18 10 1 0 41 SSW 1 13 28 12 5 2 61 SW 1 15 25 38 10 1 90 WSW 1 19 27 29 12 1 89 W 0 11 22 14 2 1 50 WNW 0 13 10 10 6 0 39 NW 0 8 20 16 4 0 48 NNW 2 12 12 26 11 0 63 Variable 0 1 0 0 0 0 1 Total 11 207 365 294 70 11 958 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 F-39 Page 132 of 182

LaSalle County Generating Station Period of Record: July - September 2013 Stability Class - Slightly Stable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 1 3 20 6 0 30 NNE 1 4 7 19 8 1 40 NE 1 4 15 22 10 2 54 ENE 1 6 19 24 3 0 53 E 0 4 12 29 15 0 60 ESE 0 2 11 17 3 0 33 SE 1 8 13 8 1 0 31 SSE 5 1 10 4 0 0 20 S 3 0 11 10 5 0 29 SSW 1 3 8 15 20 1 48 SW 1 3 13 38 35 5 95 WSW 0 2 13 22 22 4 63 W 3 2 7 14 8 5 39 WNW 1 6 10 14 4 0 35 NW 0 3 9 9 10 0 31 NNW 2 1 5 10 4 0 22 Variable 0 0 0 0 0 0 0 Total 20 50 166 275 154 18 683 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 F-40 Page 133 of 182

LaSalle County Generating Station Period of Record: July - September 2013 Stability Class - Moderately Stable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 3 1 0 0 4 NNE 0 0 4 2 0 0 6 NE 0 3 4 1 0 0 8 ENE 0 4 4 0 1 0 9 E 0 0 3 8 7 0 18 ESE 0 1 8 13 9 1 32 SE 2 1 11 12 8 3 37 SSE 1 2 8 12 1 0 24 S 0 5 7 14 8 0 34 SSW 1 5 12 27 16 3 64 SW 0 1 14 34 17 4 70 WSW 5 2 5 8 3 5 28 W 2 2 2 4 0 0 10 WNW 1 1 4 9 0 1 16 NW 1 1 1 2 0 0 5 NNW 1 1 7 2 0 0 11 Variable 0 0 0 0 0 0 0 Total 14 29 97 149 70 17 376 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 F-41 Page 134 of 182

LaSalle County Generating Station Period of Record: July - September 2013 Stability Class - Extremely Stable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 0 2 0 2 SE 0 0 1 9 3 0 13 SSE 0 0 5 4 4 0 13 S 0 0 0 0 10 0 10 SSW 0 0 3 4 3 0 10 SW 0 1 0 12 5 0 18 WSW 0 0 1 0 0 0 1 W 0 0 0 4 0 0 4 WNW 0 0 0 2 0 0 2 NW 0 0 1 1 0 0 2 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 1 11 36 27 0 75 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 F-42 Page 135 of 182

LaSalle County Generating Station Period of Record: October - December 2013 Stability Class - Extremely Unstable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 1 0 0 0 0 1 NNE 0 0 2 1 0 0 3 NE 0 0 2 1 0 0 3 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 1 1 S 0 1 2 0 0 0 3 SSW 0 0 2 0 0 0 2 SW 0 0 0 1 0 0 1 WSW 0 0 0 0 0 0 0 W 0 0 0 8 1 0 9 WNW 0 1 0 4 1 0 6 NW 0 0 0 0 0 0 0 NNW 0 1 4 0 0 0 5 Variable 0 0 0 0 0 0 0 Total 0 4 12 15 2 1 34 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 2 F-43 Page 136 of 182

LaSalle County Generating Station Period of Record: October - December 2013 Stability Class - Moderately Unstable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 3 3 3 0 0 9 NNE 0 2 7 0 0 0 9 NE 0 0 1 1 0 0 2 ENE 0 0 1 2 0 0 3 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 2 0 0 0 2 SSE 0 0 2 2 0 0 4 S 0 0 4 1 3 2 10 SSW 0 1 5 2 0 0 8 SW 0 0 3 1 0 0 4 WSW 0 0 0 1 0 0 1 W 0 0 2 7 2 0 11 WNW 0 0 4 4 0 0 8 NW 0 0 2 2 0 0 4 NNW 0 2 11 6 1 0 20 Variable 0 0 0 0 0 0 0 Total 0 8 47 32 6 2 95 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 2 F-44 Page 137 of 182

LaSalle County Generating Station Period of Record: October - December 2013 Stability Class - Slightly Unstable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 1 5 3 0 0 9 NNE 0 2 4 0 0 0 6 NE 0 0 5 0 0 0 5 ENE 0 0 4 1 0 0 5 E 0 1 3 0 0 0 4 ESE 0 1 0 0 0 0 1 SE 0 0 1 1 0 0 2 SSE 0 0 1 9 0 0 10 S 0 1 9 0 1 0 11 SSW 0 7 2 9 2 0 20 SW 0 0 10 2 0 0 12 WSW 0 0 5 9 0 0 14 W 0 0 4 14 2 0 20 WNW 0 1 10 14 1 0 26 NW 0 1 7 0 0 0 8 NNW 0 2 1 2 1 0 6 Variable 0 0 0 0 0 0 0 Total 0 17 71 64 7 0 159 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 2 F-45 Page 138 of 182

LaSalle County Generating Station Period of Record: October - December 2013 Stability Class - Neutral - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 7 3 4 0 0 14 NNE 0 6 3 0 0 0 9 NE 0 5 15 2 0 0 22 ENE 0 3 19 5 1 0 28 E 1 8 27 10 0 0 46 ESE 2 11 27 2 0 0 42 SE 1 10 20 7 0 0 38 SSE 1 7 14 14 3 0 39 S 0 12 19 16 5 1 53 SSW 1 17 19 21 8 1 67 SW 1 10 21 33 7 0 72 WSW 0 19 37 30 7 1 94 W 2 23 57 52 11 1 146 WNW 1 14 39 37 8 0 99 NW 1 5 27 24 0 0 57 NNW 0 11 55 51 7 0 124 Variable 0 0 0 0 0 0 0 Total 11 168 402 308 57 4 950 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 2 F-46 Page 139 of 182

LaSalle County Generating Station Period of Record: October - December 2013 Stability Class - Slightly Stable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 8 0 0 0 0 8 NNE 0 5 0 0 0 0 5 NE 0 2 0 1 0 0 3 ENE 0 6 2 1 0 0 9 E 0 15 9 0 0 0 24 ESE 0 10 10 0 0 0 20 SE 0 11 7 6 0 0 24 SSE 0 7 7 6 2 0 22 S 2 12 20 8 1 0 43 SSW 0 8 33 18 4 0 63 SW 0 5 29 29 11 0 74 WSW 0 10 27 6 2 0 45 W 1 8 34 18 13 3 77 WNW 1 13 32 15 15 3 79 NW 3 8 9 0 0 0 20 NNW 0 8 10 2 0 0 20 Variable 0 0 0 0 0 0 0 Total 7 136 229 110 48 6 536 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 4 Hours of missing stability measurements in all stability classes: 2 F-47 Page 140 of 182

LaSalle County Generating Station Period of Record: October - December 2013 Stability Class - Moderately Stable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 4 0 0 0 0 4 NNE 1 1 0 0 0 0 2 NE 0 0 0 0 0 0 0 ENE 1 0 0 0 0 0 1 E 0 8 3 0 0 0 11 ESE 3 4 10 0 0 0 17 SE 0 6 9 0 0 0 15 SSE 0 4 10 0 0 0 14 S 1 2 8 2 0 0 13 SSW 1 7 17 14 0 0 39 SW 1 14 11 21 3 0 50 WSW 0 5 29 3 0 0 37 W 1 12 22 0 0 0 35 WNW 0 5 7 0 1 0 13 NW 0 3 1 0 0 0 4 NNW 0 3 0 0 0 0 3 Variable 0 0 0 0 0 0 0 Total 9 78 127 40 4 0 258 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 7 Hours of missing stability measurements in all stability classes: 2 F-48 Page 141 of 182

LaSalle County Generating Station Period of Record: October - December 2013 Stability Class - Extremely Stable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 2 0 0 0 0 2 NNE 0 1 0 0 0 0 1 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 1 4 0 0 0 0 5 ESE 0 13 4 0 0 0 17 SE 3 13 7 0 0 0 23 SSE 0 11 4 0 0 0 15 S 2 2 2 0 0 0 6 SSW 1 16 10 1 0 0 28 SW 0 9 8 0 0 0 17 WSW 0 14 14 0 0 0 28 W 0 12 3 0 0 0 15 WNW 0 4 2 0 0 0 6 NW 0 0 0 0 0 0 0 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 7 101 54 1 0 0 163 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 2 F-49 Page 142 of 182

LaSalle County Generating Station Period of Record: October - December 2013 Stability Class - Extremely Unstable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 S 0 0 0 0 0 0 0 SSW 0 0 0 0 0 0 0 SW 0 0 0 0 0 0 0 WSW 0 0 0 0 0 0 0 W 0 0 0 0 0 0 0 WNW 0 0 0 0 0 0 0 NW 0 0 0 0 0 0 0 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 0 0 0 0 0 0 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 2 F-50 Page 143 of 182

LaSalle County Generating Station Period of Record: October - December 2013 Stability Class - Moderately Unstable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 S 0 0 0 0 0 0 0 SSW 0 0 0 0 0 0 0 SW 0 0 0 0 0 0 0 WSW 0 0 0 0 0 0 0 W 0 0 0 1 0 1 2 WNW 0 0 0 0 0 0 0 NW 0 0 0 0 0 0 0 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 0 0 1 0 1 2 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 2 F-51 Page 144 of 182

LaSalle County Generating Station Period of Record: October - December 2013 Stability Class - Slightly Unstable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 2 0 0 2 NNE 0 0 0 2 0 0 2 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 S 0 0 0 0 0 0 0 SSW 0 0 0 0 1 0 1 SW 0 0 0 2 2 0 4 WSW 0 0 0 0 0 0 0 W 0 0 0 2 4 0 6 WNW 0 0 0 1 0 5 6 NW 0 0 0 0 0 2 2 NNW 0 0 1 1 0 0 2 Variable 0 0 0 0 0 0 0 Total 0 0 1 10 7 7 25 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 2 F-52 Page 145 of 182

LaSalle County Generating Station Period of Record: October - December 2013 Stability Class - Neutral - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 6 6 5 3 0 20 NNE 0 5 10 9 3 0 27 NE 0 1 6 21 10 0 38 ENE 0 0 13 16 9 0 38 E 0 1 9 16 9 0 35 ESE 0 1 17 12 7 0 37 SE 0 5 14 10 5 1 35 SSE 1 5 10 17 19 4 56 S 0 1 18 20 16 23 78 SSW 1 6 18 23 21 24 93 SW 0 2 16 32 29 5 84 WSW 1 9 12 47 24 9 102 W 1 11 21 60 47 28 168 WNW 0 7 17 59 32 23 138 NW 0 5 26 60 35 6 132 NNW 1 3 16 32 31 7 90 Variable 0 0 0 0 0 0 0 Total 5 68 229 439 300 130 1171 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 37 Hours of missing stability measurements in all stability classes: 2 F-53 Page 146 of 182

LaSalle County Generating Station Period of Record: October - December 2013 Stability Class - Slightly Stable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 1 7 4 0 0 12 NNE 0 0 11 0 0 0 11 NE 0 0 4 1 0 0 5 ENE 0 3 4 2 0 1 10 E 0 2 5 10 3 1 21 ESE 0 2 3 9 2 0 16 SE 0 2 3 12 3 8 28 SSE 0 0 7 19 7 10 43 S 0 1 5 13 15 17 51 SSW 0 0 4 25 36 24 89 SW 0 4 9 22 23 49 107 WSW 0 3 7 27 15 9 61 W 0 0 7 21 14 14 56 WNW 0 2 5 22 27 28 84 NW 0 0 12 21 16 3 52 NNW 0 0 1 12 1 0 14 Variable 0 0 0 0 0 0 0 Total 0 20 94 220 162 164 660 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 29 Hours of missing stability measurements in all stability classes: 2 F-54 Page 147 of 182

LaSalle County Generating Station Period of Record: October - December 2013 Stability Class - Moderately Stable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 3 1 1 0 5 NNE 0 0 1 3 0 0 4 NE 0 1 2 2 0 0 5 ENE 0 0 4 1 0 0 5 E 0 0 1 1 0 0 2 ESE 0 0 0 3 1 0 4 SE 0 0 2 4 14 3 23 SSE 0 0 1 0 7 4 12 S 0 1 1 2 8 7 19 SSW 0 0 2 3 7 10 22 SW 0 3 6 11 6 6 32 WSW 0 0 6 6 6 1 19 W 1 0 3 7 4 1 16 WNW 0 1 4 13 7 2 27 NW 0 1 4 5 0 0 10 NNW 0 0 1 4 1 0 6 Variable 0 0 0 0 0 0 0 Total 1 7 41 66 62 34 211 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 4 Hours of missing stability measurements in all stability classes: 2 F-55 Page 148 of 182

LaSalle County Generating Station Period of Record: October - December 2013 Stability Class - Extremely Stable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 1 0 0 0 1 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 1 3 1 2 7 SSE 0 0 2 2 1 0 5 S 0 0 5 1 9 2 17 SSW 0 0 2 0 0 0 2 SW 0 0 2 1 0 0 3 WSW 0 0 4 11 2 0 17 W 0 0 3 2 2 1 8 WNW 0 0 2 3 0 0 5 NW 0 0 1 1 0 0 2 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 0 23 24 15 5 67 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 2 F-56 Page 149 of 182

APPENDIX G ERRATA DATA Page 150 of 182

1. Summary Due to an incorrect setting on Detector 08 at Teledyne Brown Engineering (TBE),

a default multiplier of 3.29 was mistakenly used in the calculations for MDC for several analyses. The error was isolated to Detector 08. Non-conformance 13-07 was initiated and corrective actions have been implemented to address the issue at TBE. All samples analyzed on Detector 08 from January 2012 through April 15th, 2013, were reprocessed using the correct factor of 4.66. As a result, all MDCs for the affected samples have increased by 41.6%. The previously reported activities and uncertainties for samples analyzed in the above mentioned timeframe were not affected. The increased MDCs caused several LLDs to be missed.

All samples from LaSalle Station that were analyzed on TBE Detector 08, during the above mentioned timeframe, are identified in the following tables. All sample results that were affected by the error are identified with the affected nuclide, the required MDC, the actual MDC, and the units. The sample results that were not affected by the error are noted with

in the appropriate locations of the tables.

G-1 Page 151 of 182

2011 START END REQUIRED REVISED CLIENT ID DATE DATE MATRIX NUCLIDE MDC MDC UNITS 4Q11 L-10 09/28/11 12/29/11 Air Particulate * * * *

Required LLDs were achieved.

G-2 Page 152 of 182

2012 START END REQUIRED REVISED CLIENT ID DATE DATE MATRIX NUCLIDE MDC MDC UNITS 1Q12 L-03 12/29/11 03/29/12 Air Particulate * * *

1Q12 L-11 12/29/11 03/29/12 Air Particulate * * *

L-40 01/05/12 01/26/12 Surface Water * * *

L-28-W4 01/12/12 01/12/12 Ground Water I-131 <15 <15.16 pCi/L L-28-W4 01/12/12 01/12/12 Ground Water La-140 <15 <15.44 pCi/L L-42 03/01/12 03/01/12 Milk * * *

L-40 03/01/12 03/29/12 Surface Water * * *

L-42 05/17/12 05/17/12 Milk * * *

L-42 06/26/12 06/26/12 Milk * * *

3Q12 L-10 06/28/12 09/27/12 Air Particulate * * *

L-42 07/12/12 07/12/12 Milk La-140 <15 <17.34 pCi/L L-40 08/02/12 08/30/12 Surface Water I-131 <15 <16.48 pCi/L L-42 08/09/12 08/09/12 Milk * * *

L-42 09/06/12 09/06/12 Milk * * *

L-QUAD 3 09/15/12 09/15/12 Vegetation * * *

4Q12 L-01 09/27/12 01/03/13 Air Particulate * * *

4Q12 L-04 09/27/12 01/03/13 Air Particulate * * *

4Q12 L-06 09/27/12 01/03/13 Air Particulate * * *

L-40 10/04/12 10/25/12 Surface Water * * *

L-28-W4 10/11/12 10/11/12 Ground Water I-131 <15 <18.26 pCi/L L-28-W4 10/11/12 10/11/12 Ground Water La-140 <15 <16.7 pCi/L L-42 10/18/12 10/18/12 Milk La-140 <15 <16.27 pCi/L L-42 11/01/12 11/01/12 Milk La-140 <15 <17.01 pCi/L L-40 11/01/12 11/29/12 Surface Water I-131 <15 <15.34 pCi/L SW-LS-103 12/05/12 RGPP * * *

L-40 12/06/12 12/27/12 Surface Water * * *

L-42 12/07/12 12/07/12 Milk * * * *

Required LLDs were achieved.

G-3 Page 153 of 182

2013 START END REQUIRED REVISED CLIENT ID DATE DATE MATRIX NUCLIDE MDC MDC UNITS L-42 01/04/13 01/04/13 Milk La-140 <15 <16.26 pCi/L L-21 02/07/13 02/28/13 Surface Water * * *

L-42 03/07/13 03/07/13 Milk * * * *

Required LLDs were achieved.

G-4 Page 154 of 182

APPENDIX H ANNUAL RADIOLOGICAL GROUNDWATER PROTECTION PROGRAM REPORT (ARGPPR)

Page 155 of 182

Docket No: 50-373 50-374 LASALLE COUNTY STATION UNITS 1 and 2 Annual Radiological Groundwater Protection Program Report 1 January Through 31 December 2013 Prepared By Teledyne Brown Engineering Environmental Services LaSalle County Station Marseilles, IL 61341 May 2014 Page 156 of 182

Table Of Contents I. Summary and Conclusions .............................................................................................. 1 II. Introduction ..................................................................................................................... 3 A. Objectives of the RGPP ...................................................................................... 3 B. Implementation of the Objectives ........................................................................ 3 C. Program Description ........................................................................................... 4 D. Characteristics of Tritium (H-3) ........................................................................... 4 III. Program Description ...................................................................................................... 5 A. Sample Analysis .................................................................................................. 5 B. Data Interpretation............................................................................................... 6 C. Background Analysis........................................................................................... 7

1. Background Concentrations of Tritium ..................................................... 7 IV. Results and Discussion ................................................................................................. 9 A. Groundwater Results........................................................................................... 9 B. Surface Water Results ...................................................................................... 11 C. Drinking Water Well Survey .............................................................................. 12 D. Summary of Results - Inter-laboratory Comparison Program.......................... 12 E. Leaks, Spills, and Releases .............................................................................. 12 F. Trends................................................................................................................ 12 G. Investigations .................................................................................................... 12 H. Actions Taken ................................................................................................... 13 i

Page 157 of 182

Appendices Appendix A Location Designation & Distance Tables Table A-1 LaSalle County Station Groundwater Monitoring Sample Point List Figures Figure A-1 LaSalle County Station Map of Groundwater Monitoring Sample Locations.

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 LaSalle County Station, 2013.

Table B-I.2 Concentrations of Gamma Emitters in Groundwater Samples Collected in the Vicinity of LaSalle County Station, 2013.

Table B-I.3 Concentrations of Hard-to-Detects in Groundwater Samples Collected in the Vicinity of LaSalle County Station, 2013.

Table B-II.1 Concentrations of Tritium, Strontium, Gross Alpha and Gross Beta in Surface Water Samples Collected in the Vicinity of LaSalle County Station, 2013.

Table B-II.2 Concentrations of Gamma Emitters in Surface Water Samples Collected in the Vicinity of LaSalle County Station, 2013.

ii Page 158 of 182

I. Summary and Conclusions In 2006, Exelon instituted a comprehensive program to evaluate the impact of station operations on groundwater and surface water in the vicinity of LaSalle County Station. This evaluation involved numerous station personnel and contractor support personnel. Following baseline sampling and subsequent recommendations, LaSalles Radiological Groundwater Protection Program (RGPP) program now consists of the four surface water and eighteen groundwater well sampling locations. The results for LaSalles RGPP sampling efforts in 2013 are included in this report.

This is the eighth in a series of annual reports on the status of the RGPP conducted at LaSalle County Station. This report covers groundwater and surface water samples, collected from the environment, both on and off station property in 2013. During that time period, 216 analyses were performed on 91 samples from 23 locations (4 surface water and 19 groundwater monitoring locations). The monitoring was conducted by Station personnel.

In assessing all the data gathered for this report, it was concluded that the operation of LaSalle County Station had no adverse radiological impact on the environment, and there are no known active releases into the groundwater at LaSalle County Station.

Strontium-89 and Strontium-90 were not detected in any groundwater or surface water samples during 2013.

All gamma-emitting radionuclides attributable to licensed plant operations were not detected in any of the groundwater or surface water samples.

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

Tritium was not detected in surface water samples at concentrations greater than the United States Environmental Protection Agency (USEPA) drinking water standard (and the Nuclear Regulatory Commission Reporting Limit) of 20,000 pCi/L. Levels of tritium were detected at concentrations greater than the LLD of 200 pCi/L in 7 of 19 groundwater monitoring locations. The tritium concentrations ranged from <LLD to 209,000 +/- 20,800 pCi/L. Elevated tritium levels (>200 pCi/L) observed are associated with the U1 CY tank leak, which occurred in June - July, 2010, and historic elevated tritium believed to be associated with the 2001 CY tank leak, as documented in the Stations 10CFR50.75(g) report.

Gross Alpha and Gross Beta analyses in the dissolved and suspended fractions were performed on groundwater samples during the third and fourth quarter Page 159 of 182

sampling in 2013. Gross Alpha (dissolved) was not detected at any groundwater locations. Gross Alpha (suspended) was detected in 6 of 12 samples affecting 5 of 8 groundwater locations analyzed. The concentrations ranged from 2.0 to 12.6 pCi/L. Gross Beta (dissolved) was detected in 9 of 12 samples affecting 7 of 8 groundwater locations analyzed. The concentrations ranged from 2.4 to 22.0 pCi/L. Gross Beta (suspended) was detected in 7 of 12 samples affecting 4 of 8 groundwater locations analyzed. The concentrations ranged from 3.1 to 52.6 pCi/L.

Gross Alpha and Gross Beta analyses in the dissolved and suspended fractions were performed on surface water samples during the third sampling in 2013.

Gross Alpha (dissolved) was not detected at any surface water locations. Gross Alpha (suspended) was not detected at any surface water locations. Gross Beta (dissolved) was detected at both of the surface water locations analyzed. The concentrations ranged from 12.2 to 14.3 pCi/L. Gross Beta (suspended) was not detected at any of the four surface water locations analyzed.

Hard-To-Detect analyses were performed on six of the groundwater sampling locations in accordance with the LaSalle RGPP and to aid in establishing background levels. The analyses included Fe-55, Ni-63, Am-241, Cm-242, Cm-243/244, Pu-238, Pu-239/240, U-234, U-235, and U-238. The isotopes of U-234 and U-238 were detected in five samples affecting 5 of 6 groundwater locations. The U-234 concentrations ranged from 0.49 to 21.2 pCi/L. The U-238 concentrations ranged from 0.61 to 11.6 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 isotope U-235 was detected in one groundwater sample at a concentration of 0.86 pCi/L. U-235 can be found in groundwater at low concentrations due to the naturally occurring Actinium Decay Series.

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Introduction The LaSalle County Station (LSCS), consisting of two boiling water reactors, each rated for 3,546 MWt, owned and operated by Exelon Corporation, is located in LaSalle County, Illinois. Unit No. 1 went critical on 16 March 1982.

Unit No. 2 went critical on 02 December 1983. The site is located in northern Illinois, approximately 75 miles southwest of Chicago, Illinois.

This report covers those analyses performed by Teledyne Brown Engineering (TBE) on samples collected in 2013.

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 LaSalle County Station as discussed below:

Exelon and its consultant identified locations as described in the 2006 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.

1. The LaSalle County Station reports describe the local hydrogeologic regime. Periodically, the flow patterns on the Page 161 of 182

surface and shallow subsurface are updated based on ongoing measurements.

2. LaSalle County Station will continue to perform routine sampling and radiological analysis of water from selected locations.

3. LaSalle County Station has implemented procedures to identify and report new leaks, spills, or other detections with potential radiological significance in a timely manner.

4. LaSalle County Station 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, Appendix A.

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

Analytical laboratories are subject to internal quality assurance programs, industry cross-check programs, as well as nuclear industry audits. Station personnel review and evaluate all analytical data deliverables as data are received.

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

D. Characteristics of Tritium (H-3)

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

Tritiated water behaves the same as ordinary water in both the Page 162 of 182

environment and the body. Tritium can be taken into the body by drinking water, breathing air, eating food, or absorption through skin. Once tritium enters the body, it disperses quickly and is uniformly distributed throughout the body. Tritium is excreted primarily through urine with a clearance rate characterized by an effective biological half-life of about 14 days. Within one month or so after ingestion, essentially all tritium is cleared. Organically bound tritium (tritium that is incorporated in organic compounds) can remain in the body for a longer period.

Tritium is produced naturally in the upper atmosphere when cosmic rays strike air molecules. Tritium is also produced during nuclear weapons explosions, as a by-product in reactors producing electricity, and in special production reactors, where the isotopes lithium-7 and/or boron-10 are activated to produce tritium. Like normal water, tritiated water is colorless and odorless. Tritiated water behaves chemically and physically like non-tritiated water in the subsurface, and therefore tritiated water will travel at the same velocity as the average groundwater velocity.

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

III. Program Description A. Sample Analysis This section describes the general analytical methodologies used by TBE to analyze the environmental samples for radioactivity for the LaSalle County Station RGPP in 2013. Sample and 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 and surface water.

2. Concentrations of strontium in groundwater and surface water.

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3. Concentrations of tritium in groundwater and surface water.

4. Concentrations of Gross Alpha, Dissolved and Suspended and Gross Beta, Dissolved and Suspended in groundwater and surface water.

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 LaSalle County Station becoming operational were used as a baseline with which these operational data were compared. For the purpose of this report, LaSalle County Station was considered operational at initial criticality. Several factors were important in the interpretation of the data:

1. Lower Limit of Detection and Minimum Detectable Concentration The lower limit of detection (LLD) is 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 Page 164 of 182

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 AREOR.

C. Background Analysis A pre-operational radiological environmental monitoring program (pre-operational REMP) was conducted to establish background radioactivity levels prior to operation of the Station. The environmental media sampled and analyzed during the pre-operational REMP were atmospheric radiation, fall-out, domestic water, surface water, precipitation, marine life, and foodstuffs. The results of the monitoring were detailed in the report entitled, Environmental Radiological Monitoring for LaSalle County Nuclear Power Station, Commonwealth Edison Company, Annual Reports for the years 1979 and 1981. The pre-operational REMP contained analytical results from samples collected from the surface water and groundwater.

1. Background Concentrations of Tritium The purpose of the following discussion is to summarize background measurements of tritium in various media performed by others. Additional detail may be found by consulting references (CRA 2006).

a. Tritium Production Tritium is created in the environment from naturally occurring processes both cosmic and subterranean, as well as from anthropogenic (i.e., man-made) sources. In the upper atmosphere, Cosmogenic tritium is produced from the bombardment of stable nuclides and combines with oxygen to form tritiated water, which will then enter the hydrologic cycle. Below ground, lithogenic tritium is produced by the bombardment of natural lithium present in crystalline rocks by neutrons produced by the radioactive decay of naturally abundant uranium and thorium. Lithogenic production of tritium is usually negligible compared to other sources due to the limited abundance of lithium in rock. The lithogenic tritium is introduced directly to groundwater.

A major anthropogenic source of tritium and strontium-90 Page 165 of 182

comes from the former atmospheric testing of thermonuclear weapons. Levels of tritium in precipitation increased significantly during the 1950s and early 1960s, and later with additional testing, resulting in the release of significant amounts of tritium to the atmosphere. The Canadian heavy water nuclear power reactors, other commercial power reactors, nuclear research and weapons production continue to influence tritium concentrations in the environment.

b. Precipitation Data Precipitation samples are routinely collected at stations around the world for the analysis of tritium and other radionuclides. Two publicly available databases that provide tritium concentrations in precipitation are Global Network of Isotopes in Precipitation (GNIP) and USEPAs RadNet database. GNIP provides tritium precipitation concentration data for samples collected world wide from 1960 to 2006.

RadNet provides tritium precipitation concentration data for samples collected at stations throughout the U.S. from 1960 up to and including 2006. Based on GNIP data for sample stations located in the U.S. Midwest, tritium concentrations peaked around 1963. This peak, which approached 10,000 pCi/L for some stations, coincided with the atmospheric testing of thermonuclear weapons. Tritium concentrations in surface water showed a sharp decline up until 1975 followed by a gradual decline since that time. Tritium concentrations in Midwest precipitation have typically been below 100 pCi/L since around 1980. LaSalles 1979 or 1981 pre-operational REMP showed precipitation tritium concentrations >300 pCi/L. Tritium concentrations in wells may still be above the 200 pCi/L detection limit from the external causes described above. Water from previous years and decades is naturally captured in groundwater, so some well water sources today are affected by the surface water from the 1960s that was elevated in tritium.

Surface Water Data Tritium concentrations are routinely measured in large surface water bodies, including Lake Michigan and the Mississippi River. Illinois surface water data were typically less than 100 pCi/L. Illinois River H-3 results have shown

>200 pCi/L, as evidenced in LaSalles REMP program sample results. This could be attributable to releases from Braidwood and Dresden upstream.

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The USEPA RadNet surface water data typically has a reported Combined Standard Uncertainty of 35 to 50 pCi/L.

According to USEPA, this corresponds to a +/- 70 to 100 pCi/L 95% confidence bound on each given measurement.

Therefore, the typical background data provided may be subject to measurement uncertainty of approximately +/- 70 to 100 pCi/L.

The radio-analytical laboratory is counting tritium results to an Exelon specified LLD of 200 pCi/L. Typically, the lowest positive measurement will be reported within a range of 40 -

240 pCi/L or 140 +/- 100 pCi/L. Clearly, these sample results cannot be distinguished as different from background at this concentration.

IV. Results and Discussion A. Groundwater Results Groundwater Samples were collected from onsite wells throughout the year in accordance with the station radiological groundwater protection program. Analytical results and anomalies are discussed below.

Tritium Samples from 19 locations were analyzed for tritium activity.

Tritium values ranged from <LLD to 209,000 pCi/L at well MW-LS-104S. Based on the hyrogeological study conducted at LaSalle, there is no feasible pathway into a drinking water supply.

Based on established aquifer flow paths the location most representative of potential offsite release into groundwater was also less than the detection limit (Table B-I.1, Appendix B).

Strontium Thirteen samples from 9 groundwater locations were analyzed for Strontium-89 and Strontium-90. The results were less than the required detection limit of 10 pCi/liter for Strontium-89 and less than the required detection limit of 1.0 pCi/liter for Strontium-90 (Table B-I.1, Appendix B).

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Gross Alpha and Gross Beta (dissolved and suspended)

Gross Alpha and Gross Beta analyses in the dissolved and suspended fractions were performed on groundwater samples during the third and fourth sampling in 2013. Gross Alpha (dissolved) was not detected at any groundwater locations. Gross Alpha (suspended) was detected in 6 of 12 samples affecting 5 of 8 groundwater locations analyzed. The concentrations ranged from 2.0 to 12.6 pCi/L. Gross Beta (dissolved) was detected in 9 of 12 samples affecting 7 of 8 groundwater locations analyzed. The concentrations ranged from 2.4 to 22.0 pCi/L. Gross Beta (suspended) was detected in 7 of 12 samples affecting 4 of 8 groundwater locations analyzed. The concentrations ranged from 3.1 to 52.6 pCi/L. These concentrations of Gross Alpha and Gross Beta, which are slightly above detectable levels, are considered to be background and are not the result of plant effluents (Table B-I.1, Appendix B).

Gamma Emitters Naturally occurring K-40 was detected in four of 23 samples analyzed. The concentration ranged from 36 to 52 pCi/L. No other gamma emitting nuclides were detected in any of the samples analyzed (Table B-I.2, Appendix B).

Hard-To-Detect Hard-To-Detect analyses were performed on six of the groundwater sampling locations in accordance with the LaSalle RGPP and were used to establish background levels. The analyses included Fe-55, Ni-63, Am-241, Cm-242, Cm-243/244, Pu-238, Pu-239/240, U-234, U-235, and U-238. The isotopes of U-234 and U-238 were detected in five samples affecting 5 of 6 groundwater locations.

The U-234 concentrations ranged from 0.49 to 21.2 pCi/L. The U-238 concentrations ranged from 0.61 to 11.6 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 isotope U-235 was detected in one groundwater sample at a concentration of 0.86 pCi/L. U-235 can be found in groundwater at low concentrations due to the naturally occurring Actinium Decay Series. The concentrations of U-234, U-235, and U-238 discussed above are considered to be background and are not the result of plant effluents (Table B-1.3, Appendix B).

All other hard-to-detect nuclides were not detected at concentrations greater than their respective MDCs.

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B. Surface Water Results Surface Water Samples were collected from on and off-site surface water locations throughout the year in accordance with the station radiological groundwater protection program. Analytical results and anomalies are discussed below.

Tritium Samples from four locations were analyzed for tritium activity.

Fourteen of 18 samples from 4 surface water locations did show activity above 200 pCi/L. The concentrations ranged from 193 to 3,290 pCi/L. Based on the hyrogeological study conducted at LaSalle, there is no feasible pathway into a drinking water supply.

Based on established aquifer flow paths the location most representative of potential offsite release into groundwater was also less than the detection limit. (Table B-II.1, Appendix B).

Strontium Two samples from 2 surface water locations were analyzed for Strontium-89 and Strontium-90. The results were less than the required detection limit of 10 pCi/liter for Strontium-89 and less than the required detection limit of 1.0 pCi/liter for Strontium-90 (Table B-II.1, Appendix B).

Gross Alpha and Gross Beta (dissolved and suspended)

Gross Alpha and Gross Beta analyses in the dissolved and suspended fractions were performed on surface water samples during the third sampling in 2013. Gross Alpha (dissolved) was not detected at any surface water locations. Gross Alpha (suspended) was not detected at any surface water locations. Gross Beta (dissolved) was detected at both of the surface water locations analyzed. The concentrations ranged from 12.2 to 14.3 pCi/L.

Gross Beta (suspended) was not detected at any of the four surface water locations analyzed. These concentrations of Gross Beta, which are slightly above detectable levels, are considered to be background and are not the result of plant effluents (Table B-II.1, Appendix B).

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Gamma Emitters Naturally occurring K-40 was detected in one of seven samples analyzed at a concentration of 49 pCi/L. No other gamma emitting nuclides were detected in any of the samples analyzed. (Table B-II.2, Appendix B).

C. Drinking Water Well Survey A drinking water well survey was conducted during the summer 2006 by CRA (CRA 2006) around the LaSalle County Station. This survey concluded that no residents in the vicinity of the plant utilize the shallow water aquifer as a drinking water supply. Site hydrological studies of aquifer flow and permeation rates from the shallow aquifer to the deep aquifer concluded that there is no feasible dose receptor via a ground water pathway at LaSalle.

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

E. Leaks, Spills, and Releases There were no new leaks identified at LaSalle Station during the reporting period.

F. Trends Analysis results from samples continue to be trended in order to assess impact to groundwater at LaSalle Station. There were no new leaks identified in the reporting period. Sample data from the plume arising from the 2010 U1 CY tank leak is being trended per the LaSalle RGPP.

The plume had been dispersing with groundwater flow, and an extraction well has been installed to provide additional control of the plume migration (see Section H.3). Currently, no tritium has migrated offsite, and tritium migration offsite is not expected.

G. Investigations No new investigations were carried out during the reporting period.

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H. Actions Taken

1. Compensatory Actions No compensatory actions were taken during the reporting period.

2. Installation of Monitoring Wells No new monitoring wells have been installed during the reporting period.

3. Actions to Recover/Reverse Plumes An extraction well (RW-LS-100S), to control the migration of the tritium plume near the U1 CY tank, was installed and became operational in October 2012.

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APPENDIX A LOCATION DESIGNATION Page 172 of 182

TABLE A-1 LaSalle County Station Groundwater Monitoring Sample Point List, 2013 Site Site Type SW-LS-101 Surface Water SW-LS-102 Surface Water SW-LS-103 Surface Water SW-LS-104 Surface Water SW-LS-105 Surface Water SW-LS-106 Surface Water MW-LS-101S Monitoring Well MW-LS-102S Monitoring Well MW-LS-103S Monitoring Well MW-LS-104S Monitoring Well MW-LS-105S Monitoring Well MW-LS-106S Monitoring Well MW-LS-107S Monitoring Well MW-LS-108S Monitoring Well MW-LS-109S Monitoring Well MW-LS-110S Monitoring Well MW-LS-111S Monitoring Well MW-LS-112S Monitoring Well MW-LS-113S Monitoring Well HP-2 Monitoring Well HP-5 Monitoring Well HP-7 Monitoring Well HP-10 Monitoring Well RW-LS-100S Extraction Well TW-LS-114S Monitoring Well TW-LS-115S Monitoring Well TW-LS-116S Monitoring Well TW-LS-117S Monitoring Well TW-LS-118S Monitoring Well TW-LS-119S Monitoring Well TW-LS-120S Monitoring Well TW-LS-121S Monitoring Well Page 173 of 182

APPENDIX A-1 LASALLE COUNTY STATION MAP OF GROUNDWATER MONITORING SAMPLE LOCATIONS Page 174 of 182

Page 175 of 182 APPENDIX B DATA TABLES Page 176 of 182

TABLE B-I.1 CONCENTRATIONS OF TRITIUM, STRONTIUM, GROSS ALPHA, AND GROSS BETA IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2013 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 Sr-89 Sr-90 Gr-A (Dis) Gr-A (Sus) Gr-B (Dis) Gr-B (Sus)

HP-10 03/27/13 < 168 HP-10 06/25/13 < 188 HP-10 09/25/13 < 173 < 3.9 < 0.6 < 4.2 2.0 +/- 1.3 < 7.0 < 4.1 HP-10 12/09/13 < 192 < 3.5 < 0.5 3.7 +/- 1.5 < 1.5 HP-2 03/27/13 < 165 HP-2 06/25/13 < 188 HP-2 09/24/13 < 174 < 7.1 < 0.6 < 1.0 < 0.8 6.0 +/- 1.0 < 1.6 HP-2 12/09/13 < 170 HP-5 03/24/13 < 169 HP-5 06/25/13 < 189 HP-5 09/25/13 < 176 < 5.4 < 0.6 < 1.5 6.5 +/- 1.5 3.6 +/- 1.1 3.1 +/- 1.3 HP-5 12/09/13 < 189 HP-7 03/27/13 < 167 HP-7 06/25/13 < 187 HP-7 09/25/13 < 172 < 6.8 < 0.6 < 1.8 < 1.1 9.8 +/- 1.4 < 3.2 HP-7 12/09/13 < 191 MW-LS-104S 03/27/13 209000 +/- 20800 MW-LS-104S 06/25/13 131000 +/- 13100 < 4.2 < 0.9 MW-LS-104S 09/25/13 169000 +/- 16800 < 0.9 < 1.1 < 1.4 < 1.6 MW-LS-104S 12/06/13 126000 +/- 12600 MW-LS-105S 03/27/13 < 179 MW-LS-105S 06/25/13 269 +/- 130 MW-LS-105S 09/24/13 223 +/- 118 < 3.4 < 0.6 < 0.7 2.8 +/- 1.5 3.9 +/- 0.9 8.3 +/- 1.9 MW-LS-105S 12/06/13 329 +/- 137 < 8.1 < 0.5 < 1.2 5.5 +/- 2.5 2.4 +/- 1.4 34.9 +/- 3.7 MW-LS-106S 03/29/13 < 180 MW-LS-106S 06/26/13 < 189 MW-LS-106S 09/25/13 < 174 MW-LS-107S 03/27/13 < 178 MW-LS-107S 06/25/13 < 188 MW-LS-107S 09/24/13 < 163 < 5.1 < 0.7 < 5.6 12.6 +/- 3.0 16.5 +/- 6.2 52.6 +/- 4.8 MW-LS-107S 12/06/13 < 191 < 7.4 < 0.5 < 23.7 < 6.7 < 11.5 17.9 +/- 3.7 MW-LS-111S 03/29/13 < 166 MW-LS-111S 06/26/13 < 189 MW-LS-111S 09/25/13 < 176 < 3.5 < 0.5 < 11.5 4.2 +/- 1.4 20.6 +/- 6.5 16.2 +/- 3.0 MW-LS-111S 12/19/13 < 188 < 6.7 < 0.6 < 7.2 < 1.7 22.0 +/- 6.4 8.2 +/- 2.7 OIL SEPARATOR 03/27/13 5600 +/- 603 OIL SEPARATOR 06/25/13 2670 +/- 320 OIL SEPARATOR 09/26/13 16300 +/- 1680 OIL SEPARATOR 12/06/13 15500 +/- 1590 RW-LS-100 03/27/13 69800 +/- 6100 RW-LS-100S 06/25/13 25500 +/- 2600 < 4.6 < 0.9 RW-LS-100S 09/24/13 49800 +/- 5000 < 2.9 < 0.8 RW-LS-100S 12/05/13 49100 +/- 4940 TW-LS-114S 03/27/13 < 166 TW-LS-114S 06/25/13 < 190 TW-LS-114S 09/24/13 < 170 TW-LS-114S 12/06/13 < 192 TW-LS-115S 03/27/13 < 169 TW-LS-115S 06/25/13 < 189 TW-LS-115S 09/24/13 < 193 TW-LS-115S 12/06/13 < 191 TW-LS-116S 03/27/13 11100 +/- 1150 TW-LS-116S 06/25/13 16500 +/- 1690 TW-LS-116S 09/24/13 11100 +/- 1160 B-1 Page 177 of 182

TABLE B-I.1 CONCENTRATIONS OF TRITIUM, STRONTIUM, GROSS ALPHA, AND GROSS BETA IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2013 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 Sr-89 Sr-90 Gr-A (Dis) Gr-A (Sus) Gr-B (Dis) Gr-B (Sus)

TW-LS-116S 12/05/13 11800 +/- 1220 TW-LS-117S 03/27/13 < 168 TW-LS-117S 06/25/13 < 189 TW-LS-117S 09/24/13 < 195 TW-LS-117S 12/06/13 < 185 TW-LS-118S 03/27/13 114000 +/- 11400 TW-LS-118S 06/25/13 71000 +/- 7110 TW-LS-118S 09/24/13 67000 +/- 6730 TW-LS-118S 12/05/13 52700 +/- 5290 TW-LS-119S 03/27/13 < 164 TW-LS-119S 06/25/13 6810 +/- 727 TW-LS-119S 09/24/13 11000 +/- 1140 TW-LS-119S 12/05/13 10100 +/- 1050 TW-LS-120S 03/27/13 < 165 TW-LS-120S 06/25/13 < 195 TW-LS-120S 09/24/13 < 196 TW-LS-120S 12/09/13 < 190 TW-LS-121S 03/27/13 < 167 TW-LS-121S 06/25/13 < 186 TW-LS-121S 09/24/13 < 193 TW-LS-121S 12/06/13 < 189 B-2 Page 178 of 182

TABLE B-I.2 CONCENTRATIONS OF GAMMA EMITTERS IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2013 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA SITE COLLECTION 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 DATE HP-10 06/25/13 < 12 < 24 < 1 < 1 < 3 < 1 < 2 < 1 < 2 < 20 < 1 < 1 < 22 < 7 HP-10 09/25/13 < 17 < 14 < 2 < 2 < 4 < 1 < 3 < 2 < 3 < 14 < 1 < 2 < 23 < 7 HP-2 06/25/13 < 12 < 9 < 1 < 1 < 3 < 1 < 2 < 1 < 2 < 18 < 1 < 1 < 21 < 7 HP-2 09/24/13 < 18 45 +/- 25 < 2 < 2 < 5 < 2 < 4 < 2 < 3 < 11 < 2 < 2 < 20 < 6 HP-5 06/25/13 < 14 < 9 < 1 < 1 < 3 < 1 < 2 < 1 < 2 < 20 < 1 < 1 < 23 < 7 HP-5 09/25/13 < 17 < 13 < 2 < 2 < 4 < 1 < 3 < 2 < 3 < 10 < 1 < 2 < 17 < 5 HP-7 06/25/13 < 12 < 25 < 1 < 1 < 4 < 1 < 2 < 1 < 2 < 18 < 1 < 1 < 22 < 8 HP-7 09/25/13 < 19 < 18 < 2 < 2 < 4 < 2 < 3 < 2 < 4 < 11 < 2 < 2 < 18 < 6 MW-LS-104S 06/25/13 < 12 < 11 < 1 < 1 < 3 < 1 < 2 < 1 < 2 < 12 < 1 < 1 < 18 < 5 MW-LS-104S 12/06/13 < 45 < 53 < 5 < 5 < 10 < 5 < 9 < 6 < 8 < 15 < 4 < 6 < 34 < 10 MW-LS-105S 06/25/13 < 15 46 +/- 28 < 1 < 1 < 3 < 1 < 2 < 1 < 3 < 18 < 1 < 1 < 22 < 7 MW-LS-105S 09/24/13 < 17 52 +/- 24 < 1 < 2 < 4 < 2 < 3 < 2 < 3 < 10 < 1 < 2 < 17 < 5 MW-LS-106S 06/26/13 < 13 < 34 < 1 < 1 < 3 < 1 < 2 < 1 < 3 < 17 < 1 < 1 < 22 < 6 B-3 MW-LS-106S 09/25/13 < 22 < 21 < 2 < 2 < 5 < 2 < 5 < 2 < 4 < 13 < 2 < 2 < 22 < 8 MW-LS-107S 06/25/13 < 15 < 13 < 1 < 2 < 4 < 1 < 3 < 2 < 3 < 22 < 1 < 1 < 27 < 7 MW-LS-107S 09/24/13 < 18 < 17 < 2 < 2 < 5 < 2 < 4 < 2 < 4 < 12 < 2 < 2 < 20 < 7 MW-LS-111S 06/26/13 < 12 < 10 < 1 < 1 < 3 < 1 < 2 < 1 < 2 < 18 < 1 < 1 < 21 < 7 MW-LS-111S 09/25/13 < 23 < 21 < 2 < 3 < 6 < 2 < 4 < 3 < 5 < 14 < 2 < 2 < 24 < 8 RW-LS-100S 06/25/13 < 12 36 +/- 24 < 1 < 1 < 3 < 1 < 2 < 1 < 2 < 13 < 1 < 1 < 16 < 5 RW-LS-100S 12/05/13 < 53 < 98 < 5 < 5 < 10 < 5 < 11 < 6 < 10 < 14 < 4 < 5 < 35 < 10 TW-LS-116S 12/05/13 < 47 < 50 < 4 < 5 < 11 < 4 < 9 < 6 < 10 < 15 < 5 < 5 < 36 < 11 TW-LS-118S 12/05/13 < 33 < 80 < 4 < 4 < 7 < 4 < 8 < 4 < 8 < 12 < 4 < 4 < 25 < 8 TW-LS-119S 12/05/13 < 47 < 106 < 5 < 5 < 15 < 6 < 11 < 6 < 10 < 13 < 5 < 5 < 32 < 12 BOLDED VALUES INDICATE LLD COULD NOT BE MET DUE TO AGE OF SAMPLE AT TIME OF RECEIPT AT THE LABORATORY Page 179 of 182

TABLE B-I.3 CONCENTRATIONS OF HARD TO DETECTS IN GROUNDWATER SAMPLES COLLECTED AS PART OF THE RADIOLOGICAL GROUNDWATER PROTECTION PROGRAM, LASALLE COUNTY STATION, 2013 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA SITE COLLECTION Am-241 Cm-242 Cm-243/244 Pu-238 Pu-239/240 U-234 U-235 U-238 Fe-55 Ni-63 DATE HP-5 12/09/13 < 0.09 < 0.04 < 0.02 < 0.11 < 0.13 0.49 +/- 0.24 < 0.12 0.61 +/- 0.26 MW-LS-104S 06/25/13 < 0.09 < 0.06 < 0.07 < 0.12 < 0.07 0.88 +/- 0.25 < 0.02 0.97 +/- 0.27 < 64 < 3.4 MW-LS-105S 12/06/13 < 0.08 < 0.06 < 0.09 < 0.06 < 0.12 1.86 +/- 0.53 < 0.10 0.96 +/- 0.36 < 148 < 5.0 MW-LS-107S 12/06/13 < 0.02 < 0.02 < 0.02 < 0.13 < 0.14 5.64 +/- 0.82 < 0.04 3.11 +/- 0.56 < 108 < 4.7 MW-LS-111S 12/19/13 < 0.09 < 0.07 < 0.02 < 0.11 < 0.12 21.2 +/- 1.88 0.86 +/- 0.26 11.6 +/- 1.17 < 137 < 4.1 RW-LS-100S 06/25/13 < 0.09 < 0.05 < 0.02 < 0.15 < 0.11 < 0.02 < 0.04 < 0.02 < 104 < 3.3 RW-LS-100S 09/24/13 < 0.14 < 0.08 < 0.09 < 0.09 < 0.16 < 0.14 < 0.10 < 0.20 < 82 < 3.9 B-4 Page 180 of 182

TABLE B-II.1 CONCENTRATIONS OF TRITIUM, STRONTIUM, GROSS ALPHA AND GROSS BETA IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2013 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 Sr-89 Sr-90 Gr-A (Dis) Gr-A (Sus) Gr-B (Dis) Gr-B (Sus)

SW-LS-101 03/29/13 < 173 SW-LS-101 06/26/13 < 190 SW-LS-101 09/25/13 < 173 SW-LS-101 12/05/13 Original 263 +/- 129 SW-LS-101 12/05/13 Recount 221 +/- 126 SW-LS-101 12/05/13 Reanalysis 193 +/- 123 SW-LS-102 03/29/13 692 +/- 144 SW-LS-102 06/26/13 < 185 SW-LS-102 09/25/13 3290 +/- 375 SW-LS-102 12/05/13 1320 +/- 190 SW-LS-103 03/29/13 315 +/- 125 SW-LS-103 06/26/13 235 +/- 131 SW-LS-103 09/25/13 927 +/- 153 < 3.9 < 0.7 < 1.2 < 0.8 14.3 +/- 1.5 < 1.6 SW-LS-103 12/05/13 1020 +/- 173 SW-LS-106 03/29/13 283 +/- 124 SW-LS-106 06/25/13 284 +/- 133 SW-LS-106 09/25/13 1060 +/- 167 < 3.5 < 0.5 < 1.2 < 0.9 12.2 +/- 1.4 < 1.7 SW-LS-106 12/11/13 1050 +/- 177 B-5 Page 181 of 182

TABLE B-II.2 CONCENTRATIONS OF GAMMA EMITTERS IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2013 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA SITE COLLECTION 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 DATE SW-LS-101 06/26/13 < 20 < 17 < 2 < 2 < 5 < 2 < 4 < 2 < 4 < 23 < 2 < 2 < 29 < 10 SW-LS-101 09/25/13 < 19 < 15 < 2 < 2 < 4 < 2 < 3 < 2 < 4 < 9 < 2 < 2 < 18 < 5 SW-LS-102 06/26/13 < 10 < 8 < 1 < 1 < 2 < 1 < 2 < 1 < 2 < 13 < 1 < 1 < 15 < 5 SW-LS-103 06/26/13 < 13 < 26 < 1 < 1 < 4 < 1 < 2 < 1 < 2 < 18 < 1 < 1 < 22 < 8 SW-LS-103 09/25/13 < 20 49 +/- 28 < 2 < 2 < 5 < 2 < 4 < 2 < 4 < 10 < 2 < 2 < 19 < 5 SW-LS-106 06/25/13 < 16 < 31 < 1 < 1 < 3 < 1 < 2 < 1 < 3 < 25 < 1 < 1 < 25 < 6 SW-LS-106 09/25/13 < 25 < 19 < 2 < 3 < 5 < 2 < 5 < 3 < 5 < 13 < 2 < 2 < 22 < 7 B-6 BOLDED VALUES INDICATE LLD COULD NOT BE MET DUE TO AGE OF SAMPLE AT TIME OF RECEIPT AT THE LABORATORY Page 182 of 182

RA14-016, Annual Radiological Environmental Operating Report

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RA14-016, Annual Radiological Environmental Operating Report

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