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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 Exeton Generation 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 Attachment cc:Regional Administrator - NRC Region III NRC Senior Resident Inspector - LaSalle County Station 2601 North 21st Road Marseilles, IL 61341 815 415 2000 Telephone www.exeloncorp.com 10 CFR 50 Appendix I LASALLE COUNTY STATION UNITS 1 and 2 Annual Radiological Environmental Operating Report

1 January Through 31 December 2013 Prepared By May 2014 LaSalle County Station Marseilles, IL 61341 Docket No:

50-374 50-373 Teledyne Brown Engineering Environmental Services

i Table Of Contents I. Summary and Conclusions

..............................................................................................

1 II. Introduction

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2 A. Objectives of the REMP

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2 B. Implementation of the Objectives

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2 III. Program Description

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2 A. Sample Collection

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2 B. Sample Analysis

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5 C. Data Interpretation

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5 D. Program Exceptions

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6 E. Program Changes

...............................................................................................

7 IV. Results and Discussion

................................................................................................. 8 A. Aquatic Environment

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8 1. Surface Water

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8 2. Ground/Well Water

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8 3. Fish ...........................................................................................................

9 4. Sediment

...................................................................................................

9 B. Atmospheric Environment

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10 1. Airborne

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10 a. Air Particulat es .............................................................................

10 b. Airborne Iodine

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11 2. Terrestrial

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

11 b. Food Products

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11 C. Ambient Gamma Radiati on ...............................................................................

12 D. Land Use Survey

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12 E. Errata Data

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13 F. Summary of Results - Inter-laboratory Comparison Program

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

Analytical Methods Table B-1 Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, LaSalle County Station, 2013 Tables Table B-2 Radiological Environmental Monitoring Program - Summary of Sample Collection and Analytical Methods, LaSalle County Station, 2013 Figure B-1 Inner Ring OSLD Locations of the LaSalle County Station, 2013 Figures 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 Table C-I.1 Concentrations of Gross Beta in Surface Water Samples Collected in the Vicinity of LaSalle County Station, 2013. Tables 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.

iii 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 L SCS, 2005 - 2013. Figure C-2 Surface Water - Tritium - Stations L

-21 (C) and L

-40 Collected in the Vicinity of L SCS, 2005 - 2013. Figure C-3 Air Particulate - Gross Beta - Stations L

-01 and L-03 Collected in the Vicinity of L SCS, 2005 - 2013. Figure C-4 Air Particulate - Gross Beta - Stations L

-05 and L-06 Collected in the Vicinity of L SCS, 2005 - 2013. Figure C-5 Air Particulate - Gross Beta - Station L-10 (C) Collected in the Vicinity of L SCS, 2005 - 2013. Figure C-6 Air Particulate - Gross Beta - Station L-04 and L-07 Collected in the Vicinity of L SCS, 2005 - 2013.

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

Appendix D Inter-Laboratory Comparison Program Table D-1 Analytics Environmental Radioactivity Cross Check Program Tables Teledyne Brown Engineering, 2013 Table D-2 ERA Environmental Radioactivity Cross Check Program Teledyne Brown Engineering, 2013 Table D-3 DOE's 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 DOE's 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)

I. Summary and Conclusions This report on the Radiological Environmental Monitoring Program conducted for the LaSalle County Station (L SCS) by Exelon covers the period 1 January 2013 through 31 December 2013. During that time period, 1, 4 53 analyses were performed on 1,3 53 samples. In assessing all the data gathered for this report and comparing these results with preoperational data, it was concluded that the operation of L SCS 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

).

II. Introduction The LaSalle County Station (L SCS), consist s 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 L SCS 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 L SCS REMP were collected for Exelon Nuclear by Environmental Inc. (Midwest Labs). This section describes the general collection methods used by Environmental Inc. (Midwest Labs) to obtain environmental samples for the L SCS 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.

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. Aquatic 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.

Atmospheric 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.

Terrestrial Environment

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 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 201 2, 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 change s 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 L SCS 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 L SCS 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 L SCS, if any, would be most significant;

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

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 L SCS REMP in 201 3. 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, 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 L SCS 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 L SCS 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.

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 03/2 7/13 OSLD found missing in field during quarterly exchange; collector placed new

2 nd quarter OSLD.

OSLD L 214-4 06/27/13 OSLD found missing during quarterly exchange; collector placed new 3 rd 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 201 3.

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 LaSalle's 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 sample s. The concentration s 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 LaSalle's effluent releases. The following analyses were performed:

Tritium Quarterly grab samples from the locations were analyzed for tritium activity (Table C

-II.1, Appendix C).

No tritium 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 LaSalle's 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 LaSalle's effluent releases. T he 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.

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 L SCS site boundary (L-03 and L-05), Group II (near site) represents the locations near the L SCS site (L-01 and L-06), Group III (far field) represents the control location at an intermediate distance from L SCS (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 L SCS. The results from the OnSite locations (Group I) ranged from 8 to 52 E-3 pCi/m 3 with a mean of 20 E-3 pCi/m 3. The results from the near site location (Group II) ranged from 8 to 54 E-3 pCi/m 3 with a mean of 21 E-3 pCi/m 3. The results from the far field locations (Group III) ranged from 5 to 57 E-3 pCi/m 3 with a mean of 20 E-3 pCi/m 3. The results from the Control location (Group IV) ranged from 7 to 52 E-3 pCi/m 3 with a mean of 20 E-3 pCi/m 3. 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/m 3. Naturally occurring K

-40 was not detected in any sample s. All other nuclides were less than the MDC.

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 LaSalle's 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.

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 (L SCS) was performed by Environmental Inc. (Midwest Labs) for Exelon Nuclear to comply with Radiological Effluent Control 12.5.2 of the LaSalle's Offsite Dose Calculation Manual. The purpose of the survey was to document the nearest resident, milk producing animal and garden of greater than 500 ft 2 in each of the sixteen 22 1/2 degree sectors around the site. The distance and direction of all locations from the L SCS reactor buildings were positioned using Global Positioning System (GPS) technology. There were no changes required to the L SCS REMP as a result of this survey.

The results of this survey are summarized below.

Distance in Miles from the L SCS Reactor Buildings Sector Residence Miles Livestock Miles Milk Farm Miles A N 3.9 4.0 - B NNE 1.6 1.7 - C NE 2.1 3.5 - D ENE 3.3 3.8 - E E 3.2 - 1 4.2 F ESE 1.4 - - G SE 1.7 4.7 - H SSE 1.8 4.7 - J S 1.5 4.7 - K SSW 0.7 - - L SW 1.0 5.8 - M WSW 1.5 - - N W 1.5 3.0 - P WNW 0.9 3.0 - Q NW 1.8 4.0 - R NNW 1.7 4.6 -

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: )()()()(22.266.4ayv tMDA Where: t = counting time for sample (minutes)

= background rate of instrument blank (cpm) 2.22 = dpm/pCi or : 2.22 x 10 6 dpm/ Ci v = volume or mass of sample analyzed y = chemical yield active 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 15 th, 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.

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 DOE's 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 ERA's evaluation report provides an acceptance range for control and warning limits with associated flag values. ERA's acceptance limits are established per the USEPA, NELAC, state specific PT program requirements or ERA's 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 MAPEP's 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, 1 78 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:

1. Teledyne Brown Engineering's 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 Engineering's 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 Engineering's 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 5. Teledyne Brown Engineering's 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 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 6. Teledyne Brown Engineering's MAPEP September 2013 Cs-134 in air particulate activity of

-0.570 Bq/sample was evaluated as a failed false positive test, based on MAPEP's 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 Engineering's 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%

lower, the Sr

-90 result would have fallen within the acceptance range. No client samples were affected by this issue. NCR 13

-14 For th e EIML laboratory, 89 of 92 analy ses met the specified acceptance criteria. Three analy ses (AP - Gross Alpha, Soil - Sr-90 and Co-57) did not meet the specified acceptance criteria for the following reasons:

1. Environmental Inc., Midwest Laboratory's 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 Laboratory's 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 Laboratory's 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.

APPENDIX A RADIOLOGICAL ENVIRONMENTAL MONITORING REPORT

SUMMARY

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUESFRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FORTHE LASALLE COUNTY STATION, 2013NAME OF FACILITY:LASALLEDOCKET NUMBER:50-373 & 50-374 2013LOCATION OF FACILITY:MARSEILLES, ILREPORTING PERIOD:

ANNUALINDICATORCONTROLLOCATION WITH HIGHEST ANNUAL MEAN (M)LOCATIONSLOCATIONMEDIUM ORTYPES OFNUMBER OFREQUIREDMEAN (M)MEAN (M)MEAN (M)STATION #NUMBER OFPATHWAY SAMPLEDANALYSISANALYSISLOWER LIMIT(F)(F)(F)NAMENONROUTINE(UNIT OFPERFORMEDPERFORMEDOF DETECTIONRANGERANGERANGEDISTANCE AND DIRECTIONREPORTEDMEASUREMENT)(LLD)MEASUREMENTSSURFACE WATERGR-B24 48.27.98.2L-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 SITEH-3 8200110911751175L-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 SITEGAMMA24MN-5415<LLD<LLD- 0CO-5815<LLD<LLD- 0FE-5930<LLD<LLD- 0CO-6015<LLD<LLD- 0ZN-6530<LLD<LLD- 0NB-9515<LLD<LLD- 0

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUESFRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FORTHE LASALLE COUNTY STATION, 2013NAME OF FACILITY:LASALLEDOCKET NUMBER:50-373 & 50-374 2013LOCATION OF FACILITY:MARSEILLES, ILREPORTING PERIOD:

ANNUALINDICATORCONTROLLOCATION WITH HIGHEST ANNUAL MEAN (M)LOCATIONSLOCATIONMEDIUM ORTYPES OFNUMBER OFREQUIREDMEAN (M)MEAN (M)MEAN (M)STATION #NUMBER OFPATHWAY SAMPLEDANALYSISANALYSISLOWER LIMIT(F)(F)(F)NAMENONROUTINE(UNIT OFPERFORMEDPERFORMEDOF DETECTIONRANGERANGERANGEDISTANCE AND DIRECTIONREPORTEDMEASUREMENT)(LLD)MEASUREMENTSSURFACE WATERZR-9530<LLD<LLD- 0(PCI/LITER)I-13115<LLD<LLD- 0CS-13415<LLD<LLD- 0CS-13718<LLD<LLD- 0BA-14060<LLD<LLD- 0LA-14015<LLD<LLD- 0GROUND WATERH-312200<LLD<LLD- 0(PCI/LITER)GAMMA12MN-5415<LLD<LLD- 0

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUESFRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FORTHE LASALLE COUNTY STATION, 2013NAME OF FACILITY:LASALLEDOCKET NUMBER:50-373 & 50-374 2013LOCATION OF FACILITY:MARSEILLES, ILREPORTING PERIOD:

ANNUALINDICATORCONTROLLOCATION WITH HIGHEST ANNUAL MEAN (M)LOCATIONSLOCATIONMEDIUM ORTYPES OFNUMBER OFREQUIREDMEAN (M)MEAN (M)MEAN (M)STATION #NUMBER OFPATHWAY SAMPLEDANALYSISANALYSISLOWER LIMIT(F)(F)(F)NAMENONROUTINE(UNIT OFPERFORMEDPERFORMEDOF DETECTIONRANGERANGERANGEDISTANCE AND DIRECTIONREPORTEDMEASUREMENT)(LLD)MEASUREMENTSGROUND WATERCO-5815<LLD<LLD- 0(PCI/LITER)FE-5930<LLD<LLD- 0CO-6015<LLD<LLD- 0ZN-6530<LLD<LLD- 0NB-9515<LLD<LLD- 0ZR-9530<LLD<LLD- 0CS-13415<LLD<LLD- 0CS-13718<LLD<LLD- 0

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUESFRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FORTHE LASALLE COUNTY STATION, 2013NAME OF FACILITY:LASALLEDOCKET NUMBER:50-373 & 50-374 2013LOCATION OF FACILITY:MARSEILLES, ILREPORTING PERIOD:

ANNUALINDICATORCONTROLLOCATION WITH HIGHEST ANNUAL MEAN (M)LOCATIONSLOCATIONMEDIUM ORTYPES OFNUMBER OFREQUIREDMEAN (M)MEAN (M)MEAN (M)STATION #NUMBER OFPATHWAY SAMPLEDANALYSISANALYSISLOWER LIMIT(F)(F)(F)NAMENONROUTINE(UNIT OFPERFORMEDPERFORMEDOF DETECTIONRANGERANGERANGEDISTANCE AND DIRECTIONREPORTEDMEASUREMENT)(LLD)MEASUREMENTSGROUND WATERBA-14060<LLD<LLD- 0(PCI/LITER)LA-14015<LLD<LLD- 0FISHGAMMA12(PCI/KG WET)MN-54130<LLD<LLD- 0CO-58130<LLD<LLD- 0FE-59260<LLD<LLD- 0CO-60130<LLD<LLD- 0ZN-65260<LLD<LLD- 0NB-95 NA<LLD<LLD- 0

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUESFRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FORTHE LASALLE COUNTY STATION, 2013NAME OF FACILITY:LASALLEDOCKET NUMBER:50-373 & 50-374 2013LOCATION OF FACILITY:MARSEILLES, ILREPORTING PERIOD:

ANNUALINDICATORCONTROLLOCATION WITH HIGHEST ANNUAL MEAN (M)LOCATIONSLOCATIONMEDIUM ORTYPES OFNUMBER OFREQUIREDMEAN (M)MEAN (M)MEAN (M)STATION #NUMBER OFPATHWAY SAMPLEDANALYSISANALYSISLOWER LIMIT(F)(F)(F)NAMENONROUTINE(UNIT OFPERFORMEDPERFORMEDOF DETECTIONRANGERANGERANGEDISTANCE AND DIRECTIONREPORTEDMEASUREMENT)(LLD)MEASUREMENTSFISHZR-95 NA<LLD<LLD- 0(PCI/KG WET)CS-134130<LLD<LLD- 0CS-137150<LLD<LLD- 0BA-140 NA<LLD<LLD- 0LA-140 NA<LLD<LLD- 0SEDIMENTGAMMA 6(PCI/KG DRY)MN-54 NA<LLD<LLD- 0CO-58 NA<LLD<LLD- 0FE-59 NA<LLD<LLD- 0

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUESFRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FORTHE LASALLE COUNTY STATION, 2013NAME OF FACILITY:LASALLEDOCKET NUMBER:50-373 & 50-374 2013LOCATION OF FACILITY:MARSEILLES, ILREPORTING PERIOD:

ANNUALINDICATORCONTROLLOCATION WITH HIGHEST ANNUAL MEAN (M)LOCATIONSLOCATIONMEDIUM ORTYPES OFNUMBER OFREQUIREDMEAN (M)MEAN (M)MEAN (M)STATION #NUMBER OFPATHWAY SAMPLEDANALYSISANALYSISLOWER LIMIT(F)(F)(F)NAMENONROUTINE(UNIT OFPERFORMEDPERFORMEDOF DETECTIONRANGERANGERANGEDISTANCE AND DIRECTIONREPORTEDMEASUREMENT)(LLD)MEASUREMENTSSEDIMENTCO-60 NA<LLD<LLD- 0(PCI/KG DRY)ZN-65 NA<LLD<LLD- 0NB-95 NA<LLD<LLD- 0ZR-95 NA<LLD<LLD- 0CS-134150<LLD<LLD- 0CS-137180<LLD122122L-21 CONTROL 0(1/2)(1/2)ILLINOIS RIVER AT SENECA - UPSTREAM4.0 MILES NE OF SITEBA-140 NA<LLD<LLD- 0LA-140 NA<LLD<LLD- 0

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUESFRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FORTHE LASALLE COUNTY STATION, 2013NAME OF FACILITY:LASALLEDOCKET NUMBER:50-373 & 50-374 2013LOCATION OF FACILITY:MARSEILLES, ILREPORTING PERIOD:

ANNUALINDICATORCONTROLLOCATION WITH HIGHEST ANNUAL MEAN (M)LOCATIONSLOCATIONMEDIUM ORTYPES OFNUMBER OFREQUIREDMEAN (M)MEAN (M)MEAN (M)STATION #NUMBER OFPATHWAY SAMPLEDANALYSISANALYSISLOWER LIMIT(F)(F)(F)NAMENONROUTINE(UNIT OFPERFORMEDPERFORMEDOF DETECTIONRANGERANGERANGEDISTANCE AND DIRECTIONREPORTEDMEASUREMENT)(LLD)MEASUREMENTSAIR PARTICULATEGR-B46810202021L-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 SITEGAMMA36MN-54 NA<LLD<LLD- 0CO-58 NA<LLD<LLD- 0FE-59 NA<LLD<LLD- 0CO-60 NA<LLD<LLD- 0ZN-65 NA<LLD<LLD- 0NB-95 NA<LLD<LLD- 0ZR-95 NA<LLD<LLD- 0

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUESFRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FORTHE LASALLE COUNTY STATION, 2013NAME OF FACILITY:LASALLEDOCKET NUMBER:50-373 & 50-374 2013LOCATION OF FACILITY:MARSEILLES, ILREPORTING PERIOD:

ANNUALINDICATORCONTROLLOCATION WITH HIGHEST ANNUAL MEAN (M)LOCATIONSLOCATIONMEDIUM ORTYPES OFNUMBER OFREQUIREDMEAN (M)MEAN (M)MEAN (M)STATION #NUMBER OFPATHWAY SAMPLEDANALYSISANALYSISLOWER LIMIT(F)(F)(F)NAMENONROUTINE(UNIT OFPERFORMEDPERFORMEDOF DETECTIONRANGERANGERANGEDISTANCE AND DIRECTIONREPORTEDMEASUREMENT)(LLD)MEASUREMENTSAIR PARTICULATECS-13450<LLD<LLD- 0(E-3 PCI/CU.METER)CS-13760<LLD<LLD- 0BA-140 NA<LLD<LLD- 0LA-140 NA<LLD<LLD- 0AIR IODINEGAMMA468(E-3 PCI/CU.METER)I-13170<LLD<LLD- 0MILKI-13120 1 NA<LLD- 0(PCI/LITER)GAMMA20MN-54 NA NA<LLD- 0CO-58 NA NA<LLD- 0

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUESFRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FORTHE LASALLE COUNTY STATION, 2013NAME OF FACILITY:LASALLEDOCKET NUMBER:50-373 & 50-374 2013LOCATION OF FACILITY:MARSEILLES, ILREPORTING PERIOD:

ANNUALINDICATORCONTROLLOCATION WITH HIGHEST ANNUAL MEAN (M)LOCATIONSLOCATIONMEDIUM ORTYPES OFNUMBER OFREQUIREDMEAN (M)MEAN (M)MEAN (M)STATION #NUMBER OFPATHWAY SAMPLEDANALYSISANALYSISLOWER LIMIT(F)(F)(F)NAMENONROUTINE(UNIT OFPERFORMEDPERFORMEDOF DETECTIONRANGERANGERANGEDISTANCE AND DIRECTIONREPORTEDMEASUREMENT)(LLD)MEASUREMENTSMILKFE-59 NA NA<LLD- 0(PCI/LITER)CO-60 NA NA<LLD- 0ZN-65 NA NA<LLD- 0NB-95 NA NA<LLD- 0ZR-95 NA NA<LLD- 0CS-13415 NA<LLD- 0CS-13718 NA<LLD- 0BA-14060 NA<LLD- 0

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUESFRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FORTHE LASALLE COUNTY STATION, 2013NAME OF FACILITY:LASALLEDOCKET NUMBER:50-373 & 50-374 2013LOCATION OF FACILITY:MARSEILLES, ILREPORTING PERIOD:

ANNUALINDICATORCONTROLLOCATION WITH HIGHEST ANNUAL MEAN (M)LOCATIONSLOCATIONMEDIUM ORTYPES OFNUMBER OFREQUIREDMEAN (M)MEAN (M)MEAN (M)STATION #NUMBER OFPATHWAY SAMPLEDANALYSISANALYSISLOWER LIMIT(F)(F)(F)NAMENONROUTINE(UNIT OFPERFORMEDPERFORMEDOF DETECTIONRANGERANGERANGEDISTANCE AND DIRECTIONREPORTEDMEASUREMENT)(LLD)MEASUREMENTSMILKLA-14015 NA<LLD- 0(PCI/LITER)VEGETATIONGAMMA10(PCI/KG WET)MN-54 NA<LLD<LLD- 0CO-58 NA<LLD<LLD- 0FE-59 NA<LLD<LLD- 0CO-60 NA<LLD<LLD- 0ZN-65 NA<LLD<LLD- 0NB-95 NA<LLD<LLD- 0ZR-95 NA<LLD<LLD- 0

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUESFRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FORTHE LASALLE COUNTY STATION, 2013NAME OF FACILITY:LASALLEDOCKET NUMBER:50-373 & 50-374 2013LOCATION OF FACILITY:MARSEILLES, ILREPORTING PERIOD:

ANNUALINDICATORCONTROLLOCATION WITH HIGHEST ANNUAL MEAN (M)LOCATIONSLOCATIONMEDIUM ORTYPES OFNUMBER OFREQUIREDMEAN (M)MEAN (M)MEAN (M)STATION #NUMBER OFPATHWAY SAMPLEDANALYSISANALYSISLOWER LIMIT(F)(F)(F)NAMENONROUTINE(UNIT OFPERFORMEDPERFORMEDOF DETECTIONRANGERANGERANGEDISTANCE AND DIRECTIONREPORTEDMEASUREMENT)(LLD)MEASUREMENTSVEGETATIONI-13160<LLD<LLD- 0(PCI/KG WET)CS-13460<LLD<LLD- 0CS-13780<LLD<LLD- 0BA-140 NA<LLD<LLD- 0LA-140 NA<LLD<LLD- 0DIRECT RADIATIONOSLD-QUARTERLY333 NA22.920.525.8L-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 APPENDIX B LOCATION DESIGNATION, DISTANCE & DIRECTION, AND SAMPLE COLLECTION & ANALYTICAL METHODS 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 N N W L-28-W5 Marseilles Well (control) 6.7 miles N N W 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 N N W L-36 Illinois River, Upstream of Discharge (control) 4.3 miles N E 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

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 - OS LD 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

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 Spectroscopy Monthly composite from weekly grab samples. TBE, TBE-2007 Gamma emitting radioisotope analysis Env. Inc., GS

-01 Determination of gamma emitters by gamma spectroscopy Surface Water Gross Beta Monthly composite from weekly grab samples. TBE, TBE-2008 Gross Alpha and/or gross beta activity in various matrices 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 from weekly grab samples. TBE, TBE-2011 Tritium analysis in drinking water by liquid scintillation

Env. Inc., T

-02 Determination of tritium in water (direct method) Ground/Well Water Gamma Spectroscopy Quarterly grab samples. TBE, TBE-2007 Gamma emitting radioisotope analysis

Env. Inc., GS

-01 Determination of gamma emitters by gamma spectroscopy Ground/Well Water Tritium Quarterly grab samples. TBE, TBE-2011 Tritium analysis in drinking water by liquid scintillation

Env. Inc., T

-02 Determination of tritium in water (direct method) Fish Gamma Spectroscopy Semi-annual samples collected via electroshocking or other techniques TBE-2007 Gamma emitting radioisotope analysis

Env. Inc., GS

-01 Determination of gamma emitters by gamma spectroscopy Sediment Gamma Spectroscopy Semi-annual grab samples TBE, TBE-2007 Gamma emitting radioisotope analysis Env. Inc., GS-01 Determination of gamma emitters by gamma spectroscopy Air Particulates Gross Beta One-week composite of continuous air sampling through glass fiber filter paper TBE, TBE-2008 Gross Alpha and/or gross beta activity in various matrices Env. Inc., AP-02 Determination of gross alpha and/or gross beta in air particulate filters Air Particulates Gamma Spectroscopy Quarterly composite of each station TBE, TBE-2007 Gamma emitting radioisotope analysis Env. Inc., GS

-01 Determination of gamma emitters by gamma spectroscopy Air Iodine Gamma Spectroscopy Bi-weekly composite of continuous air sampling through charcoal filter TBE, TBE-2007 Gamma emitting radioisotope analysis

Env. Inc., I

-131-02 Determination of I

-131 in charcoal canisters by gamma spectroscopy (batch method)

Milk I-131 Bi-weekly grab sample when cows are on pasture. Monthly all other times TBE, TBE-2012 Radioiodine in various matrices

Env. Inc., I

-131-01 Determination of I

-131 in milk by an ion exchange Milk Gamma Spectroscopy Bi-weekly grab sample when cows are on pasture. Monthly all other times TBE, TBE-2007 Gamma emitting radioisotope analysis Env. Inc., GS

-01 Determination of gamma emitters by gamma spectroscopy Food Products Gamma Spectroscopy Annual grab samples.

TBE, TBE-2007 Gamma emitting radioisotope analysis Env. Inc., GS

-01 Determination of gamma emitters by gamma spectroscopy OSLD Optically Stimulated Luminescence Dosimetry Quarterly OSLDs comprised of two

Al 2 O 3:C Landauer Incorporated elements.

Landauer Incorporated

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

Table C-I.1CONCENTRATIONS OF GROSS BETA IN SURFACE WATER SAMPLESCOLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2013RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMACOLLECTIONL-21L-40PERIOD01/03/13-01/31/139.3+/-2.18.9+/-2.002/07/13-02/28/137.3+/-2.18.1+/-2.203/07/13-03/27/138.1+/-2.18.2+/-2.104/04/13-04/25/136.5+/-1.76.9+/-1.605/02/13-05/30/134.7+/-1.96.9+/-2.006/06/13-06/27/138.4+/-1.68.0+/-1.607/04/13-07/25/136.6+/-1.68.1+/-1.708/01/13-08/29/138.8+/-1.78.5+/-1.609/05/13-09/25/137.2+/-2.08.6+/-2.010/03/13-10/31/1310.5+/-1.88.5+/-1.711/07/13-11/27/137.6+/-1.68.3+/-1.612/05/13-12/26/139.7+/-1.98.9+/-1.8MEAN7.9+/-3.28.2+/-1.3Table C-I.2CONCENTRATIONS OF TRITIUM IN SURFACE WATER SAMPLESCOLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2013RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMACOLLECTIONL-21L-40PERIOD01/03/13-03/27/13<197<19204/04/13-06/27/13<193<18407/04/13-09/25/13 1790+/-227 1690+/-21910/03/13-12/26/13 559+/-146 528+/-145MEAN 1175+/-1741 1109+/-1643THE MEAN AND TWO STANDARD DEVIATION ARE CALCULATED USING THE POSITIVE VALUES Table C-I.3CONCENTRATIONS OF GAMMA EMITTERS IN SURFACE WATER SAMPLESCOLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2013RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMASITECOLLECTIONMn-54Co-58Fe-59Co-60Zn-65Nb-95Zr-95I-131Cs-134Cs-137Ba-140La-140PERIODL-2101/03/13-01/31/13<1<1<2<1<1<1<2<15<1<1<16<402/07/13-02/28/13<2<2<6<2<4<2<4<13<2<2<24<803/07/13-03/27/13<2<2<6<2<4<2<4<13<2<2<23<904/04/13-04/25/13<2<2<4<2<3<2<3<11<2<2<18<605/02/13-05/30/13<2<2<5<2<4<2<4<3<2<2<30<906/06/13-06/27/13<1<1<3<1<2<1<2<13<1<1<17<607/04/13-07/25/13<2<2<5<2<4<2<4<13<2<2<23<808/01/13-08/29/13<1<1<3<1<2<1<3<13<1<1<18<509/05/13-09/25/13<2<2<5<1<3<2<4<6<2<2<43<1210/03/13-10/31/13<1<1<3<1<2<1<3<11<1<1<17<611/07/13-11/27/13<1<1<3<1<2<1<2<12<1<1<16<512/05/13-12/26/13<2<2<5<2<3<2<3<13<2<2<19<7MEAN------------L-4001/03/13-01/31/13<1<1<3<1<2<1<2<15<1<1<17<502/07/13-02/28/13<2<2<5<2<3<2<4<13<2<2<21<603/07/13-03/27/13<1<2<4<1<3<2<3<12<1<2<19<504/04/13-04/25/13<2<3<6<2<5<3<5<14<2<2<25<905/02/13-05/30/13<2<2<6<2<4<2<4<8<2<2<30<1006/06/13-06/27/13<1<1<3<1<2<1<2<14<1<1<17<607/04/13-07/25/13<2<2<5<2<4<2<4<12<2<2<21<708/01/13-08/29/13<1<1<3<1<2<1<2<14<1<1<19<609/05/13-09/25/13<2<2<5<2<3<2<3<7<1<2<37<1410/03/13-10/31/13<1<1<3<1<2<1<2<11<1<1<14<411/07/13-11/27/13<1<1<2<1<2<1<2<13<1<1<17<512/05/13-12/26/13<2<2<4<1<3<2<3<13<1<2<20<5MEAN------------

Table C-II.1CONCENTRATIONS OF TRITIUM IN GROUND/WELL WATER SAMPLESCOLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2013RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMACOLLECTIONL-27L-28-W4L-28-W5L-28-W6PERIOD01/10/13-01/10/13<172<170<17004/11/13-04/11/13<177<177<17607/11/13-07/11/13<191<190<19310/10/13-10/10/13<171<177<177MEAN----

Table C-II.2CONCENTRATIONS OF GAMMA EMITTERS IN GROUND/WELL WATER SAMPLESCOLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2013RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMASITECOLLECTIONMn-54Co-58Fe-59Co-60Zn-65Nb-95Zr-95Cs-134Cs-137Ba-140La-140PERIODL-2701/10/13-01/10/13<4<4<9<5<9<5<7<5<5<31<804/11/13-04/11/13<5<6<11<5<10<6<10<4<6<32<907/11/13-07/11/13<6<6<14<6<12<6<12<6<7<32<1210/10/13-10/10/13<2<2<6<2<4<3<4<2<2<24<8MEAN-----------L-28-W404/11/13-04/11/13<5<5<9<5<11<5<9<4<5<33<1210/10/13-10/10/13<2<2<4<2<3<2<3<2<2<18<6MEAN-----------L-28-W501/10/13-01/10/13<4<4<10<4<7<5<8<4<4<27<1007/11/13-07/11/13<4<4<9<3<9<4<7<4<4<27<8MEAN-----------L-28-W601/10/13-01/10/13<4<4<10<4<10<5<9<4<5<28<1004/11/13-04/11/13<5<5<11<5<11<6<9<4<5<36<1207/11/13-07/11/13<4<4<10<5<9<5<7<4<4<26<910/10/13-10/10/13<2<2<4<2<4<2<4<1<2<18<6MEAN-----------

Table C-III.1CONCENTRATIONS OF GAMMA EMITTERS IN FISH SAMPLES COLLECTEDIN THE VICINITY OF LASALLE COUNTY STATION, 2013RESULTS IN UNITS OF PC/KG WET +/- 2 SIGMASITECOLLECTIONMn-54Co-58Fe-59Co-60Zn-65Nb-95Zr-95Cs-134Cs-137Ba-140La-140PERIODL-34Common Carp05/02/13<59<72<168<75<99<88<136<63<53<904<310Largemouth Bass05/02/13<44<36<127<42<81<58<91<47<37<800<236Channel Catfish10/02/13<55<71<121<69<140<66<122<47<57<571<198Common Carp10/02/13<71<59<160<61<137<67<109<49<58<549<147MEAN-----------L-35 Channel Catfish05/02/13<53<60<147<48<106<64<110<47<53<787<220Smallmouth Buffalo05/02/13<61<81<195<69<133<61<123<59<67<1020<276Common Carp10/03/13<56<64<123<51<103<59<87<51<62<450<119Smallmouth Buffalo10/03/13<56<52<125<61<138<72<118<66<58<589<115MEAN-----------L-36 Channel Catfish05/02/13<57<61<135<68<128<64<135<54<59<949<237Smallmouth Buffalo05/02/13<52<70<151<62<126<74<115<56<56<945<231Smallmouth Bass10/03/13<50<53<105<69<108<60<98<44<61<422<130Smallmouth Buffalo10/03/13<48<51<101<48<100<58<109<51<53<470<119MEAN-----------

Table C-IV.1CONCENTRATIONS OF GAMMA EMITTERS IN SEDIMENT SAMPLESCOLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2013RESULTS IN UNITS OF PC/KG DRY +/- 2 SIGMASITECOLLECTIONMn-54Co-58Fe-59Co-60Zn-65Nb-95Zr-95Cs-134Cs-137Ba-140La-140PERIODL-2105/09/13<76<94<214<114<178<123<184<82<118<882<28510/03/13<79<107<262<92<192<124<186<67 122+/-75<1642<530MEAN-----------L-4005/09/13<65<68<175<73<156<88<141<60<76<659<18710/03/13<77<81<270<91<156<100<167<69<75<1520<424MEAN-----------L-4105/09/13<49<58<154<61<144<57<108<40<53<485<12310/03/13<45<58<156<52<112<68<112<42<49<1022<224MEAN-----------

Table C-V.1CONCENTRATIONS OF GROSS BETA IN AIR PARTICULATE SAMPLESCOLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2013RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMACOLLECTIONGROUP IGROUP IIGROUP IIIGROUP IVPERIODL-03L-05L-01L-06L-04L-07L-08L-11L-1001/03/13-01/10/13 52+/-6 48+/-6 54+/-6 48+/-6 48+/-6 49+/-6 57+/-6 46+/-6 52+/-601/10/13-01/17/13 24+/-5 24+/-5 31+/-5 25+/-5 22+/-5 27+/-5 28+/-5 23+/-5 28+/-501/17/13-01/24/13 18+/-4 20+/-5 21+/-5 21+/-5 18+/-4 17+/-4 21+/-5 16+/-4 14+/-401/24/13-01/31/13 24+/-5 29+/-5 23+/-5 25+/-5 24+/-5 24+/-5 30+/-5 27+/-5 21+/-501/31/13-02/07/13 36+/-5 32+/-5 29+/-5 34+/-5 29+/-5 34+/-5 32+/-5 32+/-5 31+/-502/07/13-02/14/13 17+/-4 14+/-4 22+/-5 29+/-5 18+/-4 22+/-5 20+/-4 20+/-4 15+/-402/14/13-02/21/13 15+/-4 17+/-4 15+/-4 19+/-5 14+/-4 18+/-4 20+/-5 16+/-4 14+/-402/21/13-02/28/13 12+/-4 11+/-4 14+/-4 25+/-5 10+/-4 16+/-4 15+/-4 14+/-4 13+/-402/28/13-03/07/13 12+/-4 11+/-4 16+/-4 11+/-4 12+/-4 15+/-4 11+/-4 13+/-4 13+/-403/07/13-03/14/13 21+/-5 18+/-5 15+/-4 15+/-4 16+/-5 16+/-5 19+/-5 15+/-5 20+/-503/14/13-03/21/13 20+/-5 21+/-4 21+/-5 21+/-5 17+/-4 21+/-5 18+/-4 15+/-4 19+/-403/21/13-03/27/13 11+/-4 13+/-4 12+/-4 11+/-4 11+/-4 8+/-4 8+/-4 22+/-5 9+/-403/27/13-04/04/13 13+/-3 18+/-4 19+/-4 15+/-4 16+/-4 18+/-4 17+/-4 19+/-4 15+/-404/04/13-04/11/13 10+/-4 22+/-5 14+/-4 15+/-4 12+/-4 12+/-4 16+/-4 17+/-4 14+/-404/11/13-04/18/13 8+/-4<5 11+/-4 10+/-4 10+/-4 5+/-3 8+/-4 10+/-4 7+/-404/18/13-04/25/13<9(1)14+/-4 16+/-4 17+/-4 17+/-4 13+/-4 14+/-4 14+/-4 15+/-404/25/13-05/02/13 25+/-5 21+/-4 23+/-5 24+/-5 21+/-4 18+/-4 22+/-4 21+/-4 26+/-505/02/13-05/09/13 12+/-4 13+/-4 15+/-4 9+/-4 12+/-4 11+/-4 14+/-4 13+/-4 8+/-405/09/13-05/16/13 20+/-5 15+/-5 15+/-5 13+/-4 18+/-5 18+/-5 14+/-4 18+/-5 15+/-505/16/13-05/23/13 17+/-4 18+/-4 19+/-4 19+/-4 17+/-4 17+/-4 15+/-4 20+/-5 15+/-405/23/13-05/30/13 15+/-5 11+/-4 8+/-4(1)12+/-4 20+/-5 11+/-4 9+/-4 14+/-4 13+/-405/30/13-06/06/13 10+/-4 8+/-4 8+/-4 9+/-4 10+/-4 7+/-4 7+/-4 10+/-4 10+/-406/06/13-06/13/13 19+/-4 18+/-4 18+/-4 16+/-4 20+/-4 15+/-4 17+/-4 19+/-4 19+/-406/13/13-06/20/13 10+/-4 11+/-4 12+/-4 14+/-4 9+/-4 13+/-4 11+/-4 12+/-4 12+/-406/20/13-06/27/13 20+/-4 19+/-4 20+/-4 16+/-4 17+/-4 17+/-4 18+/-4 20+/-4 17+/-406/27/13-07/04/13 11+/-4 11+/-4 11+/-4 11+/-4 13+/-4 9+/-4 11+/-4 13+/-4 13+/-407/04/13-07/11/13 20+/-4 29+/-7(1)17+/-4 16+/-4(1)17+/-4 18+/-4 16+/-4 23+/-4 17+/-407/11/13-07/18/13 13+/-4 10+/-4 12+/-4 12+/-4 12+/-4 14+/-4 11+/-4 12+/-4 14+/-407/18/13-07/25/13 17+/-5 16+/-4 10+/-4 14+/-4 12+/-4 12+/-4 16+/-5 14+/-4 14+/-407/25/13-08/01/13 15+/-4 14+/-4 13+/-4 16+/-4 11+/-4 15+/-4 10+/-4 14+/-4 15+/-408/01/13-08/08/13 18+/-4 17+/-4 17+/-4 20+/-5 14+/-4 19+/-4 19+/-4 21+/-5 18+/-408/08/13-08/14/13 20+/-5 22+/-5 15+/-4 19+/-5 17+/-4 16+/-4 18+/-4 22+/-5 23+/-508/14/13-08/22/13 28+/-5 26+/-5 24+/-5 26+/-5 27+/-5 28+/-5 27+/-5 35+/-5 32+/-508/22/13-08/29/13 27+/-5 24+/-5 23+/-5 27+/-5 19+/-5 30+/-5 24+/-5 24+/-5 22+/-508/29/13-09/05/13 20+/-5 19+/-5 22+/-5 18+/-4 16+/-4 21+/-5 20+/-5 20+/-5 27+/-509/05/13-09/12/13 40+/-6 35+/-5 35+/-5 40+/-6 32+/-5 38+/-5 41+/-6 34+/-5 37+/-509/12/13-09/19/13 22+/-5 22+/-5 20+/-4 24+/-5 19+/-4 18+/-4 15+/-4 21+/-5 23+/-509/19/13-09/25/13 13+/-4 14+/-4 12+/-4 18+/-5 14+/-4 16+/-5 16+/-5 15+/-4 19+/-509/25/13-10/03/13 23+/-4 25+/-5 24+/-4 27+/-5 25+/-5 23+/-4 20+/-4 25+/-5 26+/-510/03/13-10/10/13 22+/-5 18+/-4 18+/-4 20+/-5 19+/-5 20+/-5 20+/-5 17+/-4 17+/-410/10/13-10/17/13 21+/-5 18+/-5 21+/-5 19+/-5 20+/-5 23+/-5 21+/-5 19+/-5 22+/-510/17/13-10/23/13 18+/-5 15+/-5 17+/-5 18+/-5 17+/-5 22+/-5 15+/-5 15+/-5 17+/-510/23/13-10/31/13 21+/-4 17+/-4 21+/-5 21+/-5 19+/-4 23+/-5 20+/-4 23+/-5 22+/-510/31/13-11/07/13 24+/-5 25+/-5 23+/-5 25+/-5 27+/-5 25+/-5 23+/-5 23+/-5 22+/-511/07/13-11/14/13 20+/-5 18+/-5 21+/-5 18+/-5 16+/-4 23+/-5 20+/-5 19+/-5 17+/-511/14/13-11/21/13 19+/-4 16+/-4 18+/-4 22+/-5 18+/-4 21+/-4 13+/-4 24+/-5 13+/-411/21/13-11/27/13 18+/-5 17+/-5 24+/-5 22+/-5 21+/-5 21+/-5 18+/-5 18+/-5 18+/-511/27/13-12/05/13 34+/-5 33+/-5 34+/-5 39+/-5 36+/-5 42+/-5 38+/-5 42+/-5 40+/-512/05/13-12/12/13 36+/-5 39+/-6 39+/-6 38+/-6 36+/-5 41+/-6 33+/-5 43+/-6 40+/-612/12/13-12/19/13 29+/-5 28+/-5 32+/-5 33+/-5 24+/-5 31+/-5 35+/-5 32+/-5 30+/-512/19/13-12/26/13 29+/-5 26+/-5 30+/-5 33+/-5 26+/-5 30+/-5 28+/-5 31+/-5 28+/-512/26/13-01/02/14 27+/-5 31+/-5 30+/-5 21+/-5 28+/-5 28+/-5 30+/-5 26+/-5 27+/-5MEAN 20+/-17 20+/-16 20+/-17 21+/-17 19+/-15 21+/-18 20+/-19 21+/-16 20+/-18THE MEAN AND TWO STANDARD DEVIATION ARE CALCULATED USING THE POSITIVE VALUES(1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION Table C-V.2MONTHLY AND YEARLY MEAN VALUES OF GROSS BETA CONCENTRATIONS IN AIRPARTICULATE SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2013RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMAGROUP I - NEAR-SITE LOCATIONSGROUP II - FAR-FIELD LOCATIONSGROUP III - FAR-FIELD LOCATIONSGROUP IV - CONTROL LOCATIONCOLLECTIONMINMAXMEAN +/-COLLECTIONMINMAXMEAN +/-COLLECTIONMINMAXMEAN +/-COLLECTIONMINMAXMEAN +/-PERIOD2SDPERIOD2SDPERIOD2SDPERIOD2SD01/03/13-01/31/13 18 52 30+/-2601/03/13-01/31/13 21 54 31+/-2501/03/13-01/31/13 16 57 30+/-2601/03/13-01/31/13 14 52 29+/-3301/31/13-02/28/13 11 36 19+/-1901/31/13-02/28/13 14 34 23+/-1401/31/13-02/28/13 10 34 21+/-1501/31/13-02/28/13 13 31 18+/-1802/28/13-04/04/13 11 21 16+/-802/28/13-04/04/13 11 21 16+/-802/28/13-04/04/13 8 22 15+/-802/28/13-04/04/13 9 20 15+/-904/04/13-05/02/13 8 25 16+/-1404/04/13-05/02/13 10 24 16+/-1004/04/13-05/02/13 5 22 14+/-1004/04/13-05/02/13 7 26 15+/-1505/02/13-05/30/13 11 20 15+/-705/02/13-05/30/13 8 19 14+/-805/02/13-05/30/13 9 20 15+/-705/02/13-05/30/13 8 15 13+/-705/30/13-07/04/13 8 20 14+/-905/30/13-07/04/13 8 20 13+/-805/30/13-07/04/13 7 20 13+/-805/30/13-07/04/13 10 19 14+/-707/04/13-08/01/13 10 29 17+/-1107/04/13-08/01/13 10 17 14+/-507/04/13-08/01/13 10 23 14+/-607/04/13-08/01/13 14 17 15+/-308/01/13-08/29/13 17 28 23+/-808/01/13-08/29/13 15 27 21+/-908/01/13-08/29/13 14 35 22+/-1208/01/13-08/29/13 18 32 24+/-1208/29/13-10/03/13 13 40 23+/-1708/29/13-10/03/13 12 40 24+/-1708/29/13-10/03/13 14 41 23+/-1608/29/13-10/03/13 19 37 26+/-1410/03/13-10/31/13 15 22 19+/-410/03/13-10/31/13 17 21 19+/-310/03/13-10/31/13 15 23 20+/-510/03/13-10/31/13 17 22 20+/-610/31/13-11/27/13 16 25 20+/-710/31/13-11/27/13 18 25 22+/-510/31/13-11/27/13 13 27 21+/-710/31/13-11/27/13 13 22 17+/-811/27/13-01/02/14 26 39 31+/-811/27/13-01/02/14 21 39 33+/-1111/27/13-01/02/14 24 43 33+/-1211/27/13-01/02/14 27 40 33+/-1301/03/13-1/2/2014 8 52 20+/-1601/03/13-01/02/14 8 54 21+/-1701/03/13-01/02/14 5 57 20+/-1701/03/13-01/02/14 7 52 20+/-18 Table C-V.3CONCENTRATIONS OF GAMMA EMITTERS IN AIR PARTICULATE SAMPLESCOLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2013RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMASITECOLLECTIONMn-54Co-58Fe-59Co-60Zn-65Nb-95Zr-95Cs-134Cs-137Ba-140La-140PERIODL-0101/03/13-04/04/13<3<5<16<3<10<6<11<3<3<594<26004/04/13-07/04/13<4<5<17<3<8<5<12<3<3<448<13707/04/13-10/03/13<4<7<21<3<11<6<10<5<3<1069<25610/03/13-01/02/14<2<5<14<2<7<4<9<3<2<286<125MEAN-----------L-0301/03/13-04/04/13<4<8<21<3<9<7<11<4<3<670<15304/04/13-07/04/13<5<7<35<5<10<10<13<5<4<669<29407/04/13-10/03/13<3<4<19<3<9<7<10<3<3<837<30810/03/13-01/02/14<3<5<14<3<7<5<10<3<2<298<97MEAN-----------L-0401/03/13-04/04/13<3<5<18<3<8<7<11<4<3<756<24804/04/13-07/04/13<3<5<13<3<8<5<7<3<3<486<20807/04/13-10/03/13<3<4<17<3<7<5<8<3<2<776<28110/03/13-01/02/14<5<6<22<4<11<9<14<4<4<537<152MEAN-----------L-0501/03/13-04/04/13<3<5<17<3<6<7<12<3<2<610<25104/04/13-07/04/13<4<5<17<2<8<6<9<3<3<463<16507/04/13-10/03/13<3<5<16<2<7<5<8<3<2<769<35810/03/13-01/02/14<2<4<12<2<8<4<7<3<2<328<108MEAN-----------L-0601/03/13-04/04/13<3<6<16<3<9<6<12<3<2<611<23704/04/13-07/04/13<4<7<15<4<9<7<12<4<3<497<17507/04/13-10/03/13<4<9<19<5<15<10<16<4<3<902<54110/03/13-01/02/14<3<5<18<3<8<6<9<3<3<397<108MEAN-----------

Table C-V.3CONCENTRATIONS OF GAMMA EMITTERS IN AIR PARTICULATE SAMPLESCOLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2013RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMASITECOLLECTIONMn-54Co-58Fe-59Co-60Zn-65Nb-95Zr-95Cs-134Cs-137Ba-140La-140PERIODL-0701/03/13-04/04/13<4<6<19<3<9<7<10<4<3<660<28104/04/13-07/04/13<2<4<15<3<5<5<6<2<2<291<18207/04/13-10/03/13<4<7<22<3<10<7<12<4<3<978<15810/03/13-01/02/14<4<6<20<4<10<6<10<4<3<460<131MEAN-----------L-0801/03/13-04/04/13<4<7<18<4<11<7<12<5<4<796<35204/04/13-07/04/13<2<3<13<2<6<4<7<2<2<363<18507/04/13-10/03/13<2<4<18<2<6<7<9<3<2<869<31910/03/13-01/02/14<2<3<10<3<5<5<7<2<2<304<76MEAN-----------L-1001/03/13-04/04/13<4<5<17<4<9<5<10<4<3<652<29904/04/13-07/04/13<3<4<12<2<6<4<7<2<2<369<11207/04/13-10/03/13<3<5<22<3<8<9<11<4<3<835<40110/03/13-01/02/14<3<4<13<3<4<4<9<3<3<330<158MEAN-----------L-1101/03/13-04/04/13<3<5<13<2<9<5<8<3<3<473<21304/04/13-07/04/13<3<3<14<2<7<6<11<2<2<430<23007/04/13-10/03/13<2<4<19<2<7<4<8<3<2<727<38010/03/13-01/02/14<3<4<11<3<7<4<7<2<2<328<149MEAN-----------

Table C-VI.1CONCENTRATIONS OF I-131 IN AIR IODINE SAMPLES COLLECTEDIN THE VICINITY OF LASALLE COUNTY STATION, 2013RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMACOLLECTIONGROUP IGROUP IIGROUP IIIGROUP IVPERIODL-03L-05L-01L-06L-04L-07L-08L-11L-1001/03/13-01/10/13<55<55<23<55<55<43<43<43<4301/10/13-01/17/13<53<54<53<55<52<53<51<55<3301/17/13-01/24/13<45<45<15<45<44<33<33<33<3301/24/13-01/31/13<39<39<39<49<39<49<49<19<4901/31/13-02/07/13<50<50<21<49<51<47<46<45<4602/07/13-02/14/13<56<56<33<55<55<57<57<70<7002/14/13-02/21/13<27<27<14<27<27<39<39<39<3902/21/13-02/28/13<20<45<44<44<44<49<48<48<4802/28/13-03/07/13<38<38<16<38<38<25<25<25<2503/07/13-03/14/13<55<55<54<55<54<70<70<70<7003/14/13-03/21/13<52<51<31<52<52<61<61<61<6103/21/13-03/27/13<46<27<46<46<46<62<62<62<6203/27/13-04/04/13<42<42<25<42<42<66<66<66<6604/04/13-04/11/13<41<42<41<16<41<29<29<29<2904/11/13-04/18/13<65<64<65<27<65<51<51<50<5104/18/13-04/25/13<41(1)<44<44<39<44<17<39<39<3904/25/13-05/02/13<60<58<24<58<58<41<40<41<4105/02/13-05/09/13<65<65<65<65<65<67<28<65<6505/09/13-05/16/13<67<67<28<67<67<44<45<45<4505/16/13-05/23/13<45<45<45<69<45<69<69<69<2905/23/13-05/30/13<52<52<20(1)<52<52<45<46<46<4605/30/13-06/06/13<46<46<46<49<46<49<49<21<4906/06/13-06/13/13<52<52<20<52<51<40<41<41<4106/13/13-06/20/13<63<63<24<63<62<64<65<65<6506/20/13-06/27/13<58<58<22<58<58<60<59<59<5906/27/13-07/04/13<11<28<28<28<28<34<34<34<3407/04/13-07/11/13<65<44(1)<27<68(1)<64<64<64<64<6407/11/13-07/18/13<62<62<62<62<24<62<62<62<6207/18/13-07/25/13<56<57<22<56<56<52<52<52<5207/25/13-08/01/13<70<26<70<70<70<64<70<70<7008/01/13-08/08/13<19<20<8<19<19<22<22<22<2208/08/13-08/14/13<64<61<63<24<63<56<56<56<5608/14/13-08/22/13<46<47<46<57<46<58<58<22<5808/22/13-08/29/13<56<56<56<55<56<29<55<55<5508/29/13-09/05/13<34<34<13<33<33<29<29<29<2909/05/13-09/12/13<35<33<34<39<34<39<17<39<3909/12/13-09/19/13<22<22<22<20<22<21<21<9<2109/19/13-09/25/13<34<35<34<53<34<56<56<55<2209/25/13-10/03/13<44<44<44<24<44<63<61<61<6410/03/13-10/10/13<67<67<66<67<66<68<68<28<6810/10/13-10/17/13<64<65<25<64<64<65<64<63<6310/17/13-10/23/13<62<62<24<62<62<54<54<55<5510/23/13-10/31/13<30<30<12<30<30<35<34<34<3410/31/13-11/07/13<14<33<33<33<33<37<37<37<3711/07/13-11/14/13<64<64<27<64<64<57<57<56<5611/14/13-11/21/13<52<52<52<52<22<51<53<52<5211/21/13-11/27/13<57<57<31<57<57<69<69<68<6911/27/13-12/05/13<28<11<28<28<28<26<26<26<2612/05/13-12/12/13<66<66<25<66<66<69<69<69<6912/12/13-12/19/13<65<65<65<25<65<65<65<64<6512/19/13-12/26/13<41<41<41<42<41<43<43<42<4212/26/13-01/02/14<54<54<54<60<54<21<60<60<60MEAN---------(1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION Table C-VII.1CONCENTRATIONS OF I-131 IN MILK SAMPLES IN THEVICINITY OF LASALLE COUNTY STATION, 2013RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA CONTROL FARMCOLLECTIONL-42PERIOD 1/4/2013<0.502/07/13<0.703/07/13<0.704/04/13<0.805/02/13<0.705/16/13<0.705/30/13<0.606/13/13<0.606/27/13<0.807/11/13<0.607/25/13<0.708/08/13<0.708/22/13<0.609/05/13<0.809/19/13<0.910/03/13<0.810/17/13<0.910/31/13<0.611/14/13<0.712/05/13<0.8MEAN-Table C-VII.2CONCENTRATIONS OF GAMMA EMITTERS IN MILK SAMPLESCOLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2013RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMASITECOLLECTIONMn-54Co-58Fe-59Co-60Zn-65Nb-95Zr-95Cs-134Cs-137Ba-140La-140PERIODL-4201/04/13<7<8<20<10<16<8<13<5<7<46<1602/07/13<5<6<14<7<11<7<10<5<5<39<903/07/13<5<6<13<6<13<6<10<5<6<36<704/04/13<6<5<14<8<12<6<13<6<6<46<1205/02/13<5<6<15<7<15<6<11<5<6<40<1205/16/13<6<7<15<7<14<7<9<5<6<44<1305/30/13<6<5<13<7<13<5<9<6<6<27<806/13/13<6<7<15<8<13<7<11<5<7<28<906/27/13<5<6<14<7<13<7<10<6<6<39<1007/11/13<5<5<11<5<10<5<9<4<5<33<807/25/13<6<6<14<7<13<7<11<6<6<44<1408/08/13<7<7<16<7<15<8<13<6<7<49<1308/22/13<5<5<10<6<10<5<9<5<5<36<809/05/13<6<7<16<9<15<7<13<6<6<39<1109/19/13<6<7<13<8<14<7<11<6<6<42<1110/03/13<7<7<14<7<15<7<10<5<6<45<810/17/13<2<2<6<3<5<3<4<2<2<20<610/31/13<7<7<16<7<14<7<14<6<7<42<1511/14/13<5<6<15<6<12<6<12<4<6<51<1412/05/13<7<6<17<9<15<6<12<6<7<45<9MEAN-----------

Table C-VIII.1CONCENTRATIONS OF GAMMA EMITTERS IN FOOD PRODUCT SAMPLESCOLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2013RESULTS IN UNITS OF PCI/KG WET +/- 2 SIGMASITECOLLECTIONMn-54Co-58Fe-59Co-60Zn-65Nb-95Zr-95I-131Cs-134Cs-137Ba-140La-140PERIODL-CONTROLPotatoes09/07/13<11<17<38<13<35<15<28<52<11<11<107<19Swiss Chard09/07/13<13<16<39<19<38<16<25<42<10<13<101<30MEAN------------L-QUAD 1 Celery root09/07/13<13<15<39<18<29<12<23<39<12<11<75<34Kale09/07/13<12<15<32<16<30<14<22<42<11<11<76<27MEAN------------L-QUAD 2 Beets09/07/13<10<14<34<17<31<13<25<41<12<12<101<27Cabbage09/07/13<11<11<29<13<27<13<23<42<10<11<87<26MEAN------------L-QUAD 3 Cabbage09/07/13<11<11<26<14<25<12<21<34<10<11<81<24Radishes09/07/13<12<14<35<15<28<14<21<46<13<12<89<18MEAN------------L-QUAD 4 Beet greens09/07/13<9<11<27<15<26<11<19<38<9<10<83<13Beets09/07/13<10<12<30<16<28<13<20<40<9<11<82<23MEAN------------

Table C-IX.1QUARTERLY OSLD RESULTS FOR LASALLE COUNTY STATION, 2013RESULTS IN UNITS OF MREM/QUARTER +/- 2 STANDARD DEVIATIONSSTATIONMEAN JAN - MAR APR - JUN JUL - SEP OCT - DECCODE+/- 2 S.D.L-01-124.8+/-2.323.424.824.826.2L-01-224.2+/-3.626.123.322.125.1L-03-121.9+/-2.322.122.020.323.1L-03-223.2+/-1.722.722.724.522.9L-04-122.7+/-1.522.421.822.823.6L-04-222.6+/-3.422.724.822.320.7L-05-122.4+/-1.022.521.722.822.6L-05-222.9+/-1.122.323.422.623.3L-06-123.5+/-1.822.724.722.923.7L-06-224.0+/-2.725.324.822.323.5L-07-124.1+/-2.223.224.923.025.1L-07-223.9+/-3.423.126.222.223.9L-08-123.1+/-1.922.823.621.924.1L-08-222.8+/-2.022.923.421.423.6L-10-120.4+/-1.920.921.319.120.4L-10-220.7+/-2.720.520.819.022.3L-11-120.4+/-2.520.022.119.220.1L-11-220.9+/-3.620.722.718.521.8L-101-124.3+/-4.221.325.724.625.7L-101-223.3+/-2.323.324.621.823.5L-102-125.3+/-2.425.026.723.825.7L-102-225.8+/-1.126.325.126.125.6L-103-122.6+/-2.022.523.221.323.5L-103-223.3+/-2.323.623.921.624.0L-104-122.2+/-4.121.624.619.822.9L-104-221.1+/-1.220.321.321.221.7L-105-123.6+/-2.622.924.322.225.0L-105-223.5+/-0.523.323.223.823.5L-106-122.0+/-3.321.823.419.723.0L-106-221.4+/-2.122.422.020.121.0L-107-123.0+/-2.322.624.521.822.9L-107-223.4+/-3.322.624.321.625.2L-108-124.1+/-1.824.324.924.222.8L-108-219.5+/-3.419.620.317.121.0L-109-123.0+/-3.621.224.421.624.6L-109-223.7+/-4.624.522.921.026.4L-110-122.8+/-1.322.823.722.522.2L-110-222.6+/-2.821.423.521.324.0L-112-122.4+/-2.322.023.821.022.6L-112-223.9+/-1.423.624.823.223.8L-114-123.0+/-1.222.122.923.523.3L-114-222.3+/-2.922.823.020.123.2L-115-122.1+/-4.220.825.220.721.8L-115-221.3+/-2.6(1)22.720.920.2(1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION Table C-IX.1QUARTERLY OSLD RESULTS FOR LASALLE COUNTY STATION, 2013RESULTS IN UNITS OF MREM/QUARTER +/- 2 STANDARD DEVIATIONSSTATIONMEAN JAN - MAR APR - JUN JUL - SEP OCT - DECCODE+/- 2 S.D.L-116-120.8+/-3.220.221.318.922.6L-116-222.4+/-4.120.425.222.421.7L-201-318.4+/-3.218.819.416.119.4L-201-423.4+/-1.223.422.823.124.2L-202-320.7+/-2.620.722.219.021.0L-202-420.2+/-3.721.020.217.722.0L-203-123.9+/-2.224.123.922.425.0L-203-222.9+/-4.823.024.219.424.8L-204-123.2+/-2.022.122.724.223.9L-204-223.9+/-4.422.926.821.624.1L-205-123.3+/-0.723.623.523.122.9L-205-222.8+/-1.423.423.021.823.1L-205-322.6+/-1.821.722.822.223.8L-205-423.0+/-3.522.222.421.725.5L-206-123.6+/-1.823.322.823.524.9L-206-221.3+/-4.720.922.718.223.5L-207-122.1+/-1.521.522.821.322.6L-207-222.8+/-2.421.122.823.423.8L-208-122.4+/-3.122.823.720.7(1)L-208-224.6+/-2.624.426.324.723.1L-209-123.1+/-1.523.423.722.023.3L-209-223.0+/-1.022.923.722.622.6L-210-124.1+/-1.823.424.625.123.3L-210-225.0+/-3.724.527.422.925.2L-211-123.1+/-2.022.522.322.924.5L-211-223.7+/-1.422.724.323.723.9L-212-123.9+/-4.124.226.621.823.1L-212-223.0+/-1.722.524.122.123.1L-213-323.9+/-1.722.723.924.724.3L-213-421.5+/-2.220.322.020.822.7L-214-322.1+/-1.222.422.821.621.6L-214-420.7+/-0.920.9(1)21.120.2L-215-324.5+/-1.525.224.824.623.4L-215-423.7+/-2.721.924.223.725.1L-216-323.4+/-3.721.123.823.125.6L-216-424.7+/-2.825.124.223.026.3L-111B-123.1+/-2.421.424.023.923.2L-111B-224.0+/-5.124.426.420.424.8L-113A-124.8+/-2.323.926.023.725.5L-113A-224.1+/-2.024.125.523.223.6(1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION TABLE C-IX.2MEAN QUARTERLY OSLD RESULTS FOR THE INNER RING, OUTER RING,OTHER AND CONTROL LOCATIONS FOR LASALLE COUNTY STATION, 2013RESULTS IN UNITS OF MREM/QUARTER +/- 2 STANDARD DEVIATION OF THE STATION DATACOLLECTIONINNER RING OUTER RING OTHER CONTROLPERIOD+/- 2 S.D.JAN-MAR22.5+/-3.122.5+/-2.922.8+/-2.920.7+/-0.6APR-JUN24.0+/-3.023.6+/-3.323.6+/-2.721.1+/-0.7JUL-SEP21.8+/-3.722.1+/-4.122.1+/-3.319.1+/-0.1OCT-DEC23.5+/-3.123.5+/-3.023.3+/-3.121.4+/-2.7TABLE C-IX.3

SUMMARY

OF THE AMBIENT DOSIMETRY PROGRAM FOR LASALLECOUNTY STATION, 2013RESULTS IN UNITS OF MREM/QUARTERLOCATIONSAMPLESPERIODPERIOD PERIOD MEANANALYZEDMINIMUMMAXIMUM +/- 2 S.D.INNER RING 12717.126.723.0+/-3.6OUTER RING 13416.127.422.9+/-3.6OTHER 6418.526.222.9+/-3.1CONTROL 819.022.320.5+/-2.2INNER 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-116-2OUTER 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-216-4OTHER 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-11-2CONTROL STATIONS - L-10-1, L-10-2 FIGURE C-1 Surface Water - Gross Beta - Stations L-21 (C) and L-40Collected in the Vicinity of LSCS, 2005 - 20130.0 2.0 4.0 6.0 8.0 10.0 12.0 14.0 01-27-05 11-10-06 08-23-08 06-06-10 03-19-12 12-31-13 pCi/L L-21 (C) Illinois River at Seneca 0.0 2.0 4.0 6.0 8.0 10.0 12.0 01-27-05 11-10-06 08-23-08 06-06-10 03-19-12 12-31-13 pCi/L L-40 Illinois River Downstream

FIGURE C-2Surface Water - Tritium - Stations L-21 (C) and L-40Collected in the Vicinity of LSCS, 2005 - 20130 400 800 1200 1600 2000 03-31-05 12-30-06 09-29-08 06-30-10 03-30-12 12-29-13 pCi/L L-21 Illinois River at Seneca 0 400 800 1200 1600 2000 03-31-05 12-30-06 09-29-08 06-30-10 03-30-12 12-29-13 pCi/L L-40 Illinois River Downstream

Air Particulate - Gross Beta - Stations L-01 and L-03FIGURE C-3Collected in the Vicinity of LSCS, 2005 - 20130.0 10.0 20.0 30.0 40.0 50.0 60.0 01-06-05 10-24-06 08-10-08 05-28-10 03-14-12 12-30-13 10E-03 pCi/m3 L-01 Nearsite No. 1 0.0 10.0 20.0 30.0 40.0 50.0 60.0 01-06-05 10-24-06 08-10-08 05-28-10 03-14-12 12-30-13 10E-03 pCi/m3 L-03 Onsite No. 3

Air Particulate - Gross Beta - Stations L-05 and L-06FIGURE C-4Collected in the Vicinity of LSCS, 2005 - 20130.0 10.0 20.0 30.0 40.0 50.0 60.0 01-06-05 10-24-06 08-10-08 05-28-10 03-14-12 12-30-13 10E-03 pCi/m3 L-05 Onsite No. 5 0.0 10.0 20.0 30.0 40.0 50.0 60.0 70.0 01-06-05 10-24-06 08-10-08 05-28-10 03-14-12 12-30-13 10E-03 pCi/m3 L-06 Nearsite No. 6

FIGURE C-5Air Particulate - Gross Beta - Station L-10 (C)Collected in the Vicinity of LSCS, 2005 - 20130.0 10.0 20.0 30.0 40.0 50.0 60.0 01-06-05 10-24-06 08-10-08 05-28-10 03-14-12 12-30-13 10E-03 pCi/m3 L-10 (C) Streator

FIGURE C-6Air Particulate - Gross Beta - Stations L-04 and L-07Collected in the Vicinity of LSCS, 2005 - 20130.0 10.0 20.0 30.0 40.0 50.0 60.0 07-07-05 03-19-07 11-28-08 08-10-10 04-21-12 01-01-14 10E-03 pCi/m3 L-04 Rte. 170 0.0 10.0 20.0 30.0 40.0 50.0 60.0 07-07-05 03-19-07 11-28-08 08-10-10 04-21-12 01-01-14 10E-03 pCi/m3 L-07 Seneca FIGURE C-7Air Particulate - Gross Beta - Stations L-08 and L-11Collected in the Vicinity of LSCS, 2005 - 20130.0 10.0 20.0 30.0 40.0 50.0 60.0 07-07-05 03-19-07 11-28-08 08-10-10 04-21-12 01-01-14 10E-03 pCi/m3 L-08 Marseilles 0.0 10.0 20.0 30.0 40.0 50.0 60.0 07-07-05 03-19-07 11-28-08 08-10-10 04-21-12 01-01-14 10E-03 pCi/m3 L-11 Ransom APPENDIX D INTER-LABORATORY COMPARISON PROGRAM IdentificationReportedKnownRatio (c)Month/YearNumberMatrixNuclideUnitsValue (a)Value (b)TBE/AnalyticsEvaluation (d)March 2013E10477MilkSr-89pCi/L 12099.71.20 ASr-90pCi/L9.2111.00.84 AE10478MilkI-131pCi/L87.1 1000.87 ACe-141pCi/L 186 1870.99 ACr-51pCi/L 463 4720.98 ACs-134pCi/L 201 2140.94 ACs-137pCi/L 262 2660.98 ACo-58pCi/L 200 2080.96 AMn-54pCi/L 215 2081.03 AFe-59pCi/L 266 2521.06 AZn-65pCi/L 311 3011.03 ACo-60pCi/L 384 4000.96 AE10480 APCe-141pCi95.395.61.00 ACr-51pCi 264 2411.10 ACs-134pCi 123 1091.13 ACs-137pCi 142 1361.04 ACo-58pCi 112 1061.06 AMn-54pCi 115 1061.08 AFe-59pCi 139 1291.08 AZn-65pCi 163 1531.07 ACo-60pCi 212 2041.04 AE10479CharcoalI-131pCi90.192.60.97 AE10481WaterFe-55pCi/L 1840 18900.97 AJune 2013E10564MilkSr-89pCi/L 11095.01.16 ASr-90pCi/L15.817.00.93 AE10545MilkI-131pCi/L92.695.50.97 ACe-141pCi/L83.190.40.92 ACr-51pCi/L 253 2501.01 ACs-134pCi/L 118 1250.94 ACs-137pCi/L 143 1510.95 ACo-58pCi/L87.194.00.93 AMn-54pCi/L 171 1720.99 AFe-59pCi/L 125 1201.04 AZn-65pCi/L 220 2171.01 ACo-60pCi/L 169 1750.97 AE10547 APCe-141pCi56.856.71.00 ACr-51pCi 168 1571.07 ACs-134pCi85.278.41.09 ACs-137pCi 10194.61.07 ACo-58pCi62.758.91.06 AMn-54pCi 125 1081.16 AFe-59pCi85.775.01.14 AZn-65pCi 169 1361.24 WCo-60pCi 116 1101.05 AE10546CharcoalI-131pCi86.589.70.96 ATABLE D-1 ANALYTICS ENVIRONMENTAL RADIOACTIVITY CROSS CHECK PROGRAMTELEDYNE BROWN ENGINEERING, 2013(PAGE 1 OF 3)

IdentificationReportedKnownRatio (c)Month/YearNumberMatrixNuclideUnitsValue (a)Value (b)TBE/AnalyticsEvaluation (d)June 2013E10549WaterFe-55pCi/L 1610 16101.00 ASeptember 2013E10646MilkSr-89pCi/L63.996.00.67 N (1)Sr-90pCi/L8.8813.20.67 N (1)E10647MilkI-131pCi/L93.998.30.96 ACe-141pCi/LNA (2)Cr-51pCi/L 272 2770.98 ACs-134pCi/L 150 1720.87 ACs-137pCi/L 125 1310.95 ACo-58pCi/L 105 1080.97 AMn-54pCi/L 138 1390.99 AFe-59pCi/L 125 1300.96 AZn-65pCi/L 264 2660.99 ACo-60pCi/L 187 1960.95 AE10672 APCe-141pCiNA (2)Cr-51pCi 208 2230.93 ACs-134pCi 143 1391.03 ACs-137pCi 106 1051.01 ACo-58pCi97.086.51.12 AMn-54pCi 116 1121.04 AFe-59pCi98.6 1050.94 AZn-65pCi 219 2141.02 ACo-60pCi 166 1581.05 AE10648CharcoalI-131pCi76.371.71.06 AE10673WaterFe-55pCi/L 1790 16901.06 ADecember 2013E10774MilkSr-89pCi/L97.393.81.04 ASr-90pCi/L13.312.91.03 AE10775MilkI-131pCi/L89.796.10.93 ACe-141pCi/L99.8 1100.91 ACr-51pCi/L 297 2971.00 ACs-134pCi/L 129 1420.91 ACs-137pCi/L 126 1261.00 ACo-58pCi/L 116 1121.04 AMn-54pCi/L 167 1680.99 AFe-59pCi/L 117 1101.06 AZn-65pCi/L 757 7411.02 ACo-60pCi/L 141 1470.96 AE10777 APCe-141pCi85.188.00.97 ACr-51pCi 278 2381.17 ACs-134pCi 123 1141.08 ACs-137pCi 102 1011.01 ACo-58pCi84.489.90.94 AMn-54pCi 132 1350.98 AFe-59pCi 10188.31.14 AZn-65pCi 506 5950.85 ACo-60pCi 118 1181.00 ATABLE D-1 ANALYTICS ENVIRONMENTAL RADIOACTIVITY CROSS CHECK PROGRAM(PAGE 2 OF 3)TELEDYNE BROWN ENGINEERING, 2013 IdentificationReportedKnownRatio (c)Month/YearNumberMatrixNuclideUnitsValue (a)Value (b)TBE/AnalyticsEvaluation (d)December 2013E10776CharcoalI-131pCi84.780.51.05 AE10778WaterFe-55pCi/L 2010 19101.05 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.TABLE D-1 ANALYTICS ENVIRONMENTAL RADIOACTIVITY CROSS CHECK PROGRAMTELEDYNE BROWN ENGINEERING, 2013(PAGE 3 OF 3)

IdentificationReportedKnownAcceptanceMonth/YearNumberMediaNuclideUnitsValue (a)Value (b)LimitsEvaluation (c)May 2013RAD-93WaterSr-89pCi/L48.341.331.6 - 48.4 ASr-90pCi/L19.323.917.2 - 28.0 ABa-133pCi/L81.982.169.0 - 90.3 ACs-134pCi/L40.942.834.2 - 47.1 ACs-137pCi/L44.041.737.0 - 48.8 ACo-60pCi/L61.965.959.3 - 75.0 AZn-65pCi/L 202 189170 - 222 AGr-ApCi/L34.240.821.1 - 51.9 AGr-BpCi/L18.021.613.0 - 29.7 AI-131pCi/L23.823.819.7 - 28.3 AU-NatpCi/L60.461.249.8 - 67.9 AH-3pCi/L 3970 40503450 - 4460 AMRAD-18FilterGr-ApCi/filterLost during processingNovember 2013RAD-95WaterSr-89pCi/L25.521.914.4 - 28.2 ASr-90pCi/L14.318.112.8 - 21.5 ABa-133pCi/L57.254.244.7 - 59.9 ACs-134pCi/L83.386.771.1 - 95.4 ACs-137pCi/L 201 206185 - 228 ACo-60pCi/L 104 10291.8 - 114 AZn-65pCi/L 361 333300 - 389 AGr-ApCi/L29.542.822.2 - 54.3 AGr-BpCi/L30.132.220.8 - 39.9 AI-131pCi/L23.123.619.6 - 28.0 AU-NatpCi/L5.536.244.70 - 7.44 AH-3pCi/L 17650 1770015500 - 19500 AMRAD-19FilterGr-ApCi/filter33.083.027.8 - 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. (PAGE 1 OF 1)TABLE D-2 ERA ENVIRONMENTAL RADIOACTIVITY CROSS CHECK PROGRAMTELEDYNE BROWN ENGINEERING, 2013 IdentificationReportedKnownAcceptanceMonth/YearNumberMediaNuclideUnitsValue (a)Value (b)RangeEvaluation (c)March 201313-MaW28WaterCs-134Bq/L21.024.417.1 - 31.7 ACs-137Bq/L0.0446(1)ACo-57Bq/L28.330.921.6 - 40.2 ACo-60Bq/L18.219.5613.69 - 25.43 AH-3Bq/L 506 507355 - 659 AMn-54Bq/L25.727.419.2 - 35.6 AK-40Bq/L2.09(1)ASr-90Bq/L10.510.57.4 - 13.7 AZn-65Bq/L29.230.421.3 - 39.5 A13-GrW28WaterGr-ABq/L2.742.310.69 - 3.93 AGr-BBq/L15.613.06.5 - 19.5 A13-MaS28SoilCs-134Bq/kg 859 887621 - 1153 ACs-137Bq/kg 633 587411 - 763 ACo-57Bq/kg0.256(1)ACo-60Bq/kg 738 691484 - 898 AMn-54Bq/kg0.671(1)AK-40Bq/kg 714625.3437.7 - 812.9 ASr-90Bq/kg 442 628440 - 816 WZn-65Bq/kg 1057 995697 - 1294 A13-RdF28 APCs-134Bq/sample1.731.781.25 - 2.31 ACs-137Bq/sample2.732.601.82 - 3.38 ACo-57Bq/sample2.382.361.65 - 3.07 ACo-60Bq/sample0.0302(1)AMn-54Bq/sample4.364.262.98 - 5.54 ASr-90Bq/sample1.431.491.04 - 1.94 AZn-65Bq/sample3.143.132.19 - 4.07 A13-GrF28 APGr-ABq/sample0.7671.200.36 - 2.04 AGr-BBq/sample0.8710.850.43 - 1.28 A13-RdV28VegetationCs-134Bq/sample-0.197(1)ACs-137Bq/sample7.396.874.81 - 8.93 ACo-57Bq/sample9.878.686.08 - 11.28 ACo-60Bq/sample6.085.854.10 - 7.61 AMn-54Bq/sample-0.0104(1)ASr-90Bq/sample1.281.641.15 - 2.13 WZn-65Bq/sample6.846.254.38 - 8.13 ASeptember 201313-MaW29WaterCs-134Bq/L29.130.021.0 - 39.0 ACs-137Bq/L34.531.622.1 - 41.1 ACo-57Bq/L0.0358(1)ACo-60Bq/L24.623.5816.51 - 30.65 AH-3Bq/L2.45(1)AMn-54Bq/L0.0337(1)AK-40Bq/L0.193(1)ASr-90Bq/L9.127.225.05 - 9.39 WZn-65Bq/L38.134.624.2 - 45.0 A13-GrW29WaterGr-ABq/L1.130.7010.210 - 1.192 AGr-BBq/L7.615.942.97 - 8.91 ATABLE D-3 DOE'S MIXED ANALYTE PERFORMANCE EVALUATION PROGRAM (MAPEP)(PAGE 1 OF 2)TELEDYNE BROWN ENGINEERING, 2013 IdentificationReportedKnownAcceptanceMonth/YearNumberMediaNuclideUnitsValue (a)Value (b)RangeEvaluation (c)September 201313-MaS29SoilCs-134Bq/kg 1150 1172820 - 1524 ACs-137Bq/kg 1100 977684 - 1270 ACo-57Bq/kg 670(1)N (2)Co-60Bq/kg 502 451316 - 586 AMn-54Bq/kg 758 674472 - 876 AK-40Bq/kg 796 633443 - 823 WSr-90Bq/kg 664 460322 - 598 N (2)Zn-65Bq/kg 210(1)N (2)13-RdF29 APCs-134Bq/sample-0.570(1)N (2)Cs-137Bq/sample2.852.71.9 - 3.5 ACo-57Bq/sample3.303.42.4 - 4.4 ACo-60Bq/sample2.412.31.6 - 3.0 AMn-54Bq/sample3.653.52.5 - 4.6 ASr-90Bq/sample1.401.811.27 - 2.35 WZn-65Bq/sample2.902.71.9 - 3.5 A13-GrF29 APGr-ABq/sample0.8720.90.3 - 1.5 AGr-BBq/sample1.571.630.82 - 2.45 A13-RdV29VegetationCs-134Bq/sample5.295.203.64 - 6.76 ACs-137Bq/sample7.486.604.62 - 8.58 ACo-57Bq/sample0.0129(1)ACo-60Bq/sample0.0523(1)AMn-54Bq/sample8.787.885.52 - 10.24 ASr-90Bq/sample1.632.321.62 - 3.02 W (2)Zn-65Bq/sample3.182.631.84 - 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.(PAGE 2 OF 2)TABLE D-3 DOE'S MIXED ANALYTE PERFORMANCE EVALUATION PROGRAM (MAPEP)TELEDYNE BROWN ENGINEERING, 2013 TABLE D-4Lab CodeDateAnalysisERA Result (c)AcceptanceERW-159304/08/13Sr-8943.6+/- 4.341.3031.6- 48.4PassERW-159304/08/13Sr-9023.2+/- 1.723.9017.2- 28.0PassERW-159604/08/13Ba-13374.804.0082.1069.0090.30PassERW-159604/08/13Co-6065.503.4265.9059.3075.00PassERW-159604/08/13Cs-13441.103.4742.8034.2047.10PassERW-159604/08/13Cs-13742.304.0341.7037.0048.80PassERW-159604/08/13Zn-65200.3+/- 10.1189.0170.0- 222.0PassERW-159804/08/13Gr. Alpha34.301.9840.8021.1051.90PassERW-159804/08/13Gr. Beta18.700.9821.6013.0029.70PassERW-160004/08/13I-13123.00+/- 1.1023.8019.70- 28.30PassERW-160004/08/13I-131(Gamma)23.48+/- 9.4423.8019.70+/- 28.30PassERW-160604/08/13H-3 4041+/- 194 4050 3450- 4460PassERW-600910/07/13Sr-8922.002.8021.9014.4028.20PassERW-600910/07/13Sr-9017.102.5518.1012.8021.50PassERW-601210/07/13Ba-13348.204.2954.2044.7059.90PassERW-601210/07/13Co-60100.8+/- 4.7102.091.8- 114.0PassERW-601210/07/13Cs-13487.304.3586.7071.1095.40PassERW-601210/07/13Cs-137199.6+/- 7.4206.0185.0- 228.0PassERW-601210/07/13Zn-65356.2+/- 13.2333.0300.0- 389.0PassERW-601510/07/13Gr. Alpha30.7011.9042.8022.2054.30PassERW-601510/07/13Gr. Beta25.706.4832.2020.8039.90PassERW-601910/07/13I-13122.501.0123.6019.6028.00PassERW-602410/07/13H-3 18397 695 17700 15500 19500Passa 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.LimitsResult (b)ERA (a) STATISTICAL

SUMMARY

PROFICIENCY TESTING PROGRAMENVIRONMENTAL, INC., 2013(Page 1 of 1)Concentration (pCi/L)Laboratory Control TABLE D-5KnownLab Code (b)DateAnalysisLaboratory resultActivityAcceptanceMAAP-73802/01/13Co-572.58+/- 0.062.361.65- 3.07PassMAAP-73802/01/13Co-600.01+/- 0.030.000.00- 0.10PassMAAP-73802/01/13Cs-1341.82+/- 0.131.781.25- 2.31PassMAAP-73802/01/13Cs-1372.93+/- 0.102.601.82- 3.38PassMAAP-73802/01/13Mn-544.87+/- 0.134.262.98- 5.54PassMAAP-73802/01/13Sr-901.39+/- 0.141.491.04- 1.94PassMAAP-73802/01/13Zn-653.84+/- 0.203.132.19- 4.07PassMAAP-738 d02/01/13Gr. Alpha0.14+/- 0.031.200.36- 2.04Fail (1)MAAP-73802/01/13Gr. Beta0.93+/- 0.060.850.43- 1.28PassMAW-80602/01/13Co-5731.200.4030.9021.6040.20PassMAW-80602/01/13Co-6019.70+/- 0.3016.5613.69- 25.43PassMAW-80602/01/13Cs-13423.20+/- 0.5024.4017.10- 31.70PassMAW-80602/01/13Cs-1370.03+/- 0.120.000.00- 1.00PassMAW-80602/01/13Fe-5534.00+/- 3.3044.0030.80- 57.20PassMAW-80602/01/13H-3511.60+/- 12.50507.00355.00- 659.00PassMAW-80602/01/13K-402.20+/- 0.900.000.00- 5.00PassMAW-80602/01/13Mn-5427.60+/- 0.5027.4019.20- 35.60PassMAW-80602/01/13Sr-909.30+/- 0.8010.507.40- 13.70PassMAW-80602/01/13Zn-6531.60+/- 0.8030.4021.30- 39.50PassMAW-81102/01/13Gr. Alpha1.87+/- 0.092.310.69- 3.93PassMAW-81102/01/13Gr. Beta13.04+/- 0.1313.006.50- 19.50PassMASO-73902/01/13Co-570.60+/- 0.500.000.00- 5.00PassMASO-73902/01/13Co-60739.20+/- 28.50691.00484.00- 898.00PassMASO-73902/01/13Cs-134863.30+/- 34.10887.00621.00- 1153.00PassMASO-73902/01/13Cs-137661.80+/- 25.70587.00411.00- 763.00PassMASO-73902/01/13K-40745.80+/- 33.30625.30437.70- 812.90PassMASO-73902/01/13Mn-541.10+/- 1.000.000.00- 5.00PassMASO-73902/01/13Zn-651109.60+/- 44.10995.00697.00- 1294.00PassMASO-744 e02/01/13Sr-90408.40+/- 14.00628.00440.00- 816.00Fail (2)MAVE-74702/01/13Co-5710.37+/- 0.178.686.08- 11.28PassMAVE-74702/01/13Co-606.48+/- 0.175.854.10- 7.61PassMAVE-74702/01/13Cs-1340.02+/- 0.040.000.00- 0.10PassMAVE-74702/01/13Cs-1377.79+/- 0.216.874.81- 8.93PassMAVE-74702/01/13Mn-540.00+/- 0.050.000.00- 0.10PassMAVE-74702/01/13Zn-657.29+/- 0.336.254.38- 8.13PassMASO-5043 f08/01/13Co-57699.60+/- 3.900.000.00- 5.00Fail (3)MASO-504308/01/13Cs-1341191.70+/- 23.001172.00820.00- 1524.00PassMASO-504308/01/13Cs-1371072.00+/- 5.10977.00684.00- 1270.00PassMASO-504308/01/13K-40760.00+/- 16.20633.00443.00- 823.00PassMASO-504308/01/13Mn-54753.80+/- 4.90674.00472.000- 876.000PassConcentration (a)ControlDOE'S MIXED ANALYTE PERFORMANCE EVALUATION PROGRAM (MAPEP)ENVIRONMENTAL, INC., 2013(Page 1 of 2)Limits (c)

TABLE D-5KnownLab Code (b)DateAnalysisLaboratory resultActivityAcceptanceMASO-504308/01/13Sr-90383.90+/- 14.50460.00322.00- 598.00PassMASO-504308/01/13Zn-65-351.50+/- 5.500.000.00- 0.00PassMAW-509408/01/13Co-570.01+/- 0.090.000.00- 5.00PassMAW-509408/01/13Co-6023.20+/- 0.3223.5816.51- 30.65PassMAW-509408/01/13Cs-13427.60+/- 0.5830.4021.00- 39.00PassMAW-509408/01/13Cs-13732.31+/- 0.5231.6022.10- 41.10PassMAW-509408/01/13Fe-5539.20+/- 3.5053.3037.30- 69.30PassMAW-509408/01/13Gr. Alpha0.54+/- 0.050.700.21- 1.19PassMAW-509408/01/13Gr. Beta5.85+/- 0.095.942.97- 8.91PassMAW-509408/01/13H-31.20+/- 3.000.000.00- 5.00PassMAW-509408/01/13K-402.22+/- 0.900.000.00- 5.00PassMAW-509408/01/13Mn-540.010+/- 0.110.000.00- 5.00PassMAW-509408/01/13Sr-906.40+/- 0.607.225.05- 9.39PassMAW-509408/01/13Zn-6535.30+/- 0.9034.6024.20- 45.00PassMAVE-504608/01/13Co-570.01+/- 0.030.000.00- 0.00PassMAVE-504608/01/13Co-600.00+/- 0.040.000.00- 0.00PassMAVE-504608/01/13Cs-1345.71+/- 0.235.203.64- 6.76PassMAVE-504608/01/13Cs-1377.64+/- 0.206.604.62- 8.58PassMAVE-504608/01/13Mn-549.08+/- 0.247.885.52- 10.24PassMAVE-504608/01/13Zn-652.92+/- 0.252.631.84- 3.42PassMAAP-504608/01/13Co-573.48+/- 0.143.401.90- 3.50PassMAAP-504608/01/13Co-602.44+/- 0.083.401.60- 3.00PassMAAP-504608/01/13Cs-1340.01+/- 0.030.000.02- 0.04PassMAAP-504608/01/13Cs-1373.09+/- 0.132.701.90- 3.50PassMAAP-504608/01/13Gr. Alpha0.28+/- 0.040.900.27- 1.53PassMAAP-504608/01/13Gr. Beta1.90+/- 0.081.630.82- 2.45PassMAAP-504608/01/13Mn-543.95+/- 0.123.502.50- 4.60PassMAAP-504608/01/13Sr-901.69+/- 4.101.811.27- 2.35PassMAAP-504608/01/13Zn-653.27+/- 0.182.702.50- 4.60Passa 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.DOE'S MIXED ANALYTE PERFORMANCE EVALUATION PROGRAM (MAPEP)Limits (c)Concentration (a)ControlENVIRONMENTAL, INC., 2013(Page 2 of 2)

APPENDIX E EFFLUENT DATA i 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 ii 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

1 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 3 546 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 les s significant in terms of radiation protection.

2

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 1.0 5E+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.

3 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 1.0 7E+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 201 3. 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.

4 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/cm 2 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 5 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 i s 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 6 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)

APPENDIX E-1 DATA TABLES AND FIGURES Table 1.1-1 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (20

13) UNIT 1 AND UNIT 2 DOCKET NUMBERS 50

-373 AND 50

-374 GASEOUS EFFLUENTS SUMMATION OF ALL RELEASES A. Fission & Activation Gases Unit Quarter 1 Quarter 2 Quarter 3 Quarter4 Est. Total 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 Ci/sec4.02E+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 Ci/sec3.20 E-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 3.09 E-03 6.61 E-03 3.50E+01 2. Average release rate for the period Ci/sec5.66E-04 2.32E-04 3.89 E-04 8.32E-04 3. Percent of ODCM limit

* *

D. Tritium

1. Total Release Ci 2.41E-01 3.60 E-01 1.56E+00 3.59E+00 1.50E+01 2. Average release rate for the period Ci/sec1.30E+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 Ci/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 Ci/sec1.08E+00 1.0 7E+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

Table 1.2-1 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (20

13) LIQUID RELEASES UNIT 1 AND UNIT 2 SUMMATION OF ALL LIQUID RELEASES A. Fission & Activation Products Unit Quarter 1 Quarter 2 Quarter 3 Quarter4 Est. Total Error % 1. Total Release (not including tritium, gases & alpha)

Ci <LLD <LLD <LLD <LLD N/A 2. Average diluted concentration during period Ci/mL<LLD <LLD <LLD <LLD 3. Percent of applicable limit

% * * *

B. Tritium

1. Total Release Ci <LLD <LLD <LLD <LLD N/A 2. Average diluted concentration during period Ci/mL<LLD <LLD <LLD <LLD 3. Percent of applicable limit

% * * *

C. Dissolved & Entrained Gases

1. Total Release Ci <LLD <LLD <LLD <LLD N/A 2. Average diluted concentration during period Ci/mL<LLD <LLD <LLD <LLD 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 Ci/mL<LLD <LLD <LLD <LLD 3. Percent of ODCM limit

% * * *

E. Volume of Waste Released (prior to dilution) Liters 0.00E+00 0.00E+00 0.00E+00 0.00E+00 F. Volume of Dilution Water Used During Period Liters 0.00E+00 0.00E+00 0.00E+00 0.00E+00 "*" 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

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).

Table 3.1-1 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (20

13) RADIOLOGICAL IMPACT ON MAN MAXIMUM DOSES RESULTING FROM GASEOUS RELEASES AND COMPLIANCE STATUS Infant Receptor Quarterly Limit Units 1st Quarter % of Limit 2nd Quarter % of Limit 3 rd Quarter % of Limit 4th Quarter % of Limit Annual Limit % of 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 0.1 1 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 Child Receptor Quarterly Limit Units 1st Quarter % of Limit 2nd Quarter % of Limit 3 rd Quarter % of Limit 4th Quarter % of Limit Annual Limit % of 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 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 Teenager Receptor Quarterly Limit Units 1st Quarter % of Limit 2nd Quarter % of Limit 3 rd Quarter % of Limit 4th Quarter % of Limit Annual Limit % of 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 0.1 1 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 Adult Receptor Quarterly Limit Units 1st Quarter % of Limit 2nd Quarter % of Limit 3 rd Quarter % of Limit 4th Quarter % of Limit Annual Limit % of 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 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 (20

13) RADIOLOGICAL IMPACT ON MAN MAXIMUM DOSES RESULTING FROM LIQUID RELEASES AND COMPLIANCE STATUS Infant Receptor Quarterly Limit Units 1st Quarter % of Limit 2nd Quarter % of Limit 3 rd Quarter % of Limit 4th Quarter % of Limit Annual Limit % of 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 Child Receptor Quarterly Limit Units 1st Quarter % of Limit 2nd Quarter % of Limit 3 rd Quarter % of Limit 4th Quarter % of Limit Annual Limit % of 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 Teenager Receptor Quarterly Limit Units 1st Quarter % of Limit 2nd Quarter % of Limit 3 rd Quarter % of Limit 4th Quarter % of Limit Annual Limit % of 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 Adult Receptor Quarterly Limit Units 1st Quarter % of Limit 2nd Quarter % of Limit 3 rd Quarter % of Limit 4th Quarter % of Limit Annual Limit % of 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 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 1 st Quarter 2nd Quarter 3 rd Quarter 4th Quarter Annual Annual % Annual Dose Dose Dose Dose Dose Limit Limit (mRem) (mRem) (mRem) (mRem) (mRem) (mRem/yr) Unit 1 40CFR190 Compliance U1 D Ex 9.93E-02 8.53E-02 1.00E-01 1.03E-01 3.88E-01 25 1.55 10CFR20 Compliance U1 DTot 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 U2 D Ex 7.07E-02 8.37E-02 9.57E-02 9.86E-02 3.49E-01 25 1.39 10CFR20 Compliance U2 DTot 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

Table 3.4-1 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (20

13) RADIOLOGICAL IMPACT ON MAN MAXIMUM GAMMA AIR DOSE

APPENDIX F METEOROLOGICAL DATA LaSalle County Generating Station Per iod of Record: January - March 2013 Stabili ty 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

LaSalle County Generating Station Per iod of Record: January - March 2013 Stabili ty Class - Moderately Unstable - 200Ft-33 Ft Delta-T (F) Winds Measured a t 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

LaSalle County Generating Station Per iod of Record: January - March 2013

Stabili ty 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

LaSalle County Generating Station Pe riod of Record: January - March 2013 Stabili ty Class - Neutral - 200Ft-33Ft Delta

-T (F) Wind s 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

LaSalle County Generating Station Period of Record: January - March 2013 Stabili ty Class - Slightly Stable - 200Ft-33Ft Del ta-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

LaSalle County Generating Station Per iod of Record: January - March 2013 Stabili ty 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

LaSalle County Generating Station Per iod of Record: January - March 2013 Stabili ty 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 LaSalle County Generating Station Per iod of Record: January - March 2013 Stabili ty 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

LaSalle County Generating Station Per iod of Record: January - March 2013 Stabili ty 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

LaSalle County Generating Station Per iod of Record: January - March 2013 Stabili ty 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

ES E 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

LaSalle County Generating Station Per iod of Record: January - March 2013 Stabili ty Class - Neutral - 375Ft-3 3Ft 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

LaSalle County Generating Station Per iod of Record: January - March 2013 Stabili ty 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 Hou rs of missing wind measurements in this stability class: 6 Hours of missing stability measurements in all stability classes: 3

LaSalle County Generating Station Per iod of Record: January - March 2013 Stabili ty 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

LaSalle County Generating Station Per iod of Record: January - March 2013 Stabili ty 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

LaSalle County Generating Station P eriod of Record: April - June 2013 Stabili ty 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

LaSalle County Generating Station P eriod of Record: April - June 2013 Stabili ty Class - Moderately Unstable - 200Ft-33Ft Del ta-T (F) Winds Measured a t 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

LaSalle County Generating Station P eriod of Record: April - June 2013 Stabili ty 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

LaSalle County Generating Station P eriod of Record: April - June 2013 Stabili ty Class - Neutral - 200Ft-33Ft Delta

-T (F) Win d s 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

LaSalle County Generating Station P eriod of Record: April - June 2013 Stabili ty 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

LaSalle County Generating Station P eriod of Record: April - June 2013 Stabili ty 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

LaSalle County Generating Station P eriod of Record: April - June 2013 Stabili ty 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 T otal

----- ----- ----- ----- ----- ----- -----

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

LaSalle County Generating Station P eriod of Record: April - June 2013 Stabili ty 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

LaSalle County Generating Station P eriod of Record: April - June 2013 Stabili ty 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

LaSalle County Generating Station P eriod of Record: April - June 2013 Stabili ty 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

LaSalle County Generating Station P eriod of Record: April - June 2013 Stabili ty 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

LaSalle County Generating Station P eriod of Record: April - June 2013 Stabili ty 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

LaSalle County Generating Station P eriod of Record: April - June 2013 Stabili ty 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

LaSalle County Generating Station P eriod of Record: April - June 2013 Stabili ty 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

LaSalle County Generating Station Period of Record: July - September 2013 Stabili ty 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 13-1 8 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

LaSalle County Generating Station Period of Record: July - September 2013 Stabili ty Class - Moderately Unstable - 200Ft-33Ft Delta

-T (F) Winds Measured a t 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

LaSalle County Generating Station Period of Record: July - September 2013 Stabil ity Class - Slightly Unstable - 200Ft-33Ft Delta

-T (F) Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1

-3 4-7 8-1 2 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 H ours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

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

LaSalle County Generating Station Period of Record: July - September 2013 Stabili ty 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

LaSalle County Generating Station Period of Record: July - September 2013 Stabili ty 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 Ho urs of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0

LaSalle County Generating Station Period of Record: July - September 2013 Stabili ty 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

LaSalle County Generating Station Period of Record: July - September 2013 Stabili ty 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

LaSalle County Generating Station Period of Record: July - September 2013 Stabili ty Class - Slightly U nstable - 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

LaSalle County Generating Station Period of Record: July - September 2013 Stabili ty 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

LaSalle County Generating Station Period of Record: July - September 2013 Stabili ty Class - Slightly Sta ble - 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

LaSalle County Generating Station Period of Record: July - September 2013 Stabili ty 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

LaSalle County Generating Station Period of Record: July - September 2013 Stabili ty Class - Extrem ely 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

LaSalle County Generating Station Period of Record: October - December 2013 Stabili ty 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

LaSalle County Generating Station Period of Record: October - December 2013 Stabili ty Class - Moderately Unstable - 200Ft-33Ft Delta

-T (F) Winds Measured a t 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

LaSalle County Generating Station Period of Record: October - December 2013 Stabili ty 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

LaSalle County Generating Station Period of Record: October - December 2013 Stabili ty Class - Neutral - 200Ft-33Ft Delta

-T (F) Wind s 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

LaSalle County Generating Station Period of Record: October - December 2013 Stabili ty 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

ES E 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

LaSalle County Generating Station Period of Record: October - December 2013 Stabili ty Class - Moderately Sta ble - 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

LaSalle County Generating Station Period of Record: October - December 2013 Stabili ty 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

N NW 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

LaSalle County Generating Station Period of Record: October - December 2013 Stabili ty Class - Extre mely 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

LaSalle County Generating Station Period of Record: October - December 2013 Stabili ty Class - Moderately Unstable - 375Ft-33Ft Delta

-T (F) Winds Measured at 375 Feet Wind Speed (in mph)

Wind

Dir ection 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

LaSalle County Generating Station Period of Record: October - December 2013 Stabili t y 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

LaSalle County Generating Station Period of Record: October - December 2013 Stabili ty Class - Neutral - 375Ft-33Ft Delta

-T (F) Winds Measured at 375 Feet Wind Speed (in mph)

Wind

D irection 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 1 32 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

LaSalle County Generating Station Period of Record: October - December 2013 Stabil i ty 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

LaSalle County Generating Station Period of Record: October - December 2013 Stabili ty 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

LaSalle County Generating Station Period of Record: October - December 2 013 Stabili ty 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

APPENDIX G ERRATA DATA

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 15 th, 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.

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

* * * *Required LLDs were achieved.

2012 CLIENT ID START DATE END DATE MATRIX NUCLIDE REQUIRED MDC REVISED 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.

2013 CLIENT ID START DATE END DATE MATRIX NUCLIDE REQUIRED MDC REVISED 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.

APPENDIX H ANNUAL RADIOLOGICAL GROUNDWATER PROTECTION PROGRAM REPORT (ARGPPR)

LASALLE COUNTY STATION UNITS 1 and 2 Annual Radiological Groundwater Protection Program Report

1 January Through 31 December 2013 Prepared By May 2014 LaSalle County Station Marseilles, IL 61341 Docket No:

50-374 50-373 Teledyne Brown Engineering Environmental Services

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

Figures Appendix B Data 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. Tables 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.

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, LaSalle's Radiological Groundwater Protection Program

(RGPP) program now consists of the four surface water and eighteen groundwater well sampling locations. The results for LaSalle's 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 sample s 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 Station's 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 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.

Introduction The LaSalle County Station (L SCS), 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. Objective s 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 surface and shallow subsurface are updated based on ongoin g 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 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.

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 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 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 USEPA's 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. LaSalle's 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 LaSalle's REMP program sample results. This could be attributable to releases from Braidwood and Dresden upstream.

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-1 04 S. 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).

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 t he 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 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. Th e 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 o f

plant effluents (Table B

-1.3, Appendix B).

Hard-To-Detect All other hard

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

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).

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.

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.

APPENDIX A LOCATION DESIGNATION

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

APPENDIX A-1 LASALLE COUNTY STATION MAP OF GROUNDWATER MONITORING SAMPLE LOCATIONS

APPENDIX B DATA TABLES TABLE B-I.1CONCENTRATIONS OF TRITIUM, STRONTIUM, GROSS ALPHA, AND GROSSBETA IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2013RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMACOLLECTIONSITEDATEH-3 Sr-89 Sr-90Gr-A (Dis)Gr-A (Sus)Gr-B (Dis)Gr-B (Sus)HP-1003/27/13<168HP-1006/25/13<188HP-1009/25/13<173<3.9<0.6<4.22.0+/-1.3<7.0<4.1HP-1012/09/13<192<3.5<0.53.7+/-1.5<1.5HP-203/27/13<165HP-206/25/13<188HP-209/24/13<174<7.1<0.6<1.0<0.86.0+/-1.0<1.6HP-212/09/13<170HP-503/24/13<169HP-506/25/13<189HP-509/25/13<176<5.4<0.6<1.56.5+/-1.53.6+/-1.13.1+/-1.3HP-512/09/13<189HP-703/27/13<167HP-706/25/13<187HP-709/25/13<172<6.8<0.6<1.8<1.19.8+/-1.4<3.2HP-712/09/13<191MW-LS-104S03/27/13209000+/-20800MW-LS-104S06/25/13131000+/-13100<4.2<0.9MW-LS-104S09/25/13169000+/-16800<0.9<1.1<1.4<1.6MW-LS-104S12/06/13126000+/-12600MW-LS-105S03/27/13<179MW-LS-105S06/25/13269+/-130MW-LS-105S09/24/13223+/-118<3.4<0.6<0.72.8+/-1.53.9+/-0.98.3+/-1.9MW-LS-105S12/06/13329+/-137<8.1<0.5<1.25.5+/-2.52.4+/-1.434.9+/-3.7MW-LS-106S03/29/13<180MW-LS-106S06/26/13<189MW-LS-106S09/25/13<174MW-LS-107S03/27/13<178MW-LS-107S06/25/13<188MW-LS-107S09/24/13<163<5.1<0.7<5.612.6+/-3.016.5+/-6.252.6+/-4.8MW-LS-107S12/06/13<191<7.4<0.5<23.7<6.7<11.517.9+/-3.7MW-LS-111S03/29/13<166MW-LS-111S06/26/13<189MW-LS-111S09/25/13<176<3.5<0.5<11.54.2+/-1.420.6+/-6.516.2+/-3.0MW-LS-111S12/19/13<188<6.7<0.6<7.2<1.722.0+/-6.48.2+/-2.7OIL SEPARATOR03/27/135600+/-603OIL SEPARATOR06/25/132670+/-320OIL SEPARATOR09/26/1316300+/-1680OIL SEPARATOR12/06/1315500+/-1590RW-LS-10003/27/1369800+/-6100RW-LS-100S06/25/1325500+/-2600<4.6<0.9RW-LS-100S09/24/1349800+/-5000<2.9<0.8RW-LS-100S12/05/1349100+/-4940TW-LS-114S03/27/13<166TW-LS-114S06/25/13<190TW-LS-114S09/24/13<170TW-LS-114S12/06/13<192TW-LS-115S03/27/13<169TW-LS-115S06/25/13<189TW-LS-115S09/24/13<193TW-LS-115S12/06/13<191TW-LS-116S03/27/1311100+/-1150TW-LS-116S06/25/1316500+/-1690TW-LS-116S09/24/1311100+/-1160 TABLE B-I.1CONCENTRATIONS OF TRITIUM, STRONTIUM, GROSS ALPHA, AND GROSSBETA IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2013RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMACOLLECTIONSITEDATEH-3 Sr-89 Sr-90Gr-A (Dis)Gr-A (Sus)Gr-B (Dis)Gr-B (Sus)TW-LS-116S12/05/1311800+/-1220TW-LS-117S03/27/13<168TW-LS-117S06/25/13<189TW-LS-117S09/24/13<195TW-LS-117S12/06/13<185TW-LS-118S03/27/13114000+/-11400TW-LS-118S06/25/1371000+/-7110TW-LS-118S09/24/1367000+/-6730TW-LS-118S12/05/1352700+/-5290TW-LS-119S03/27/13<164TW-LS-119S06/25/136810+/-727TW-LS-119S09/24/1311000+/-1140TW-LS-119S12/05/1310100+/-1050TW-LS-120S03/27/13<165TW-LS-120S06/25/13<195TW-LS-120S09/24/13<196TW-LS-120S12/09/13<190TW-LS-121S03/27/13<167TW-LS-121S06/25/13<186TW-LS-121S09/24/13<193TW-LS-121S12/06/13<189 TABLE B-I.2CONCENTRATIONS OF GAMMA EMITTERS IN GROUNDWATERSAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2013RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMASITECOLLECTIONBe-7K-40Mn-54Co-58Fe-59Co-60Zn-65Nb-95Zr-95I-131Cs-134Cs-137Ba-140La-140DATEHP-1006/25/13<12<24<1<1<3<1<2<1<2<20<1<1<22<7HP-1009/25/13<17<14<2<2<4<1<3<2<3<14<1<2<23<7HP-206/25/13<12<9<1<1<3<1<2<1<2<18<1<1<21<7HP-209/24/13<18 45+/-25<2<2<5<2<4<2<3<11<2<2<20<6HP-506/25/13<14<9<1<1<3<1<2<1<2<20<1<1<23<7HP-509/25/13<17<13<2<2<4<1<3<2<3<10<1<2<17<5HP-706/25/13<12<25<1<1<4<1<2<1<2<18<1<1<22<8HP-709/25/13<19<18<2<2<4<2<3<2<4<11<2<2<18<6MW-LS-104S06/25/13<12<11<1<1<3<1<2<1<2<12<1<1<18<5MW-LS-104S12/06/13<45<53<5<5<10<5<9<6<8<15<4<6<34<10MW-LS-105S06/25/13<15 46+/-28<1<1<3<1<2<1<3<18<1<1<22<7MW-LS-105S09/24/13<17 52+/-24<1<2<4<2<3<2<3<10<1<2<17<5MW-LS-106S06/26/13<13<34<1<1<3<1<2<1<3<17<1<1<22<6MW-LS-106S09/25/13<22<21<2<2<5<2<5<2<4<13<2<2<22<8MW-LS-107S06/25/13<15<13<1<2<4<1<3<2<3<22<1<1<27<7MW-LS-107S09/24/13<18<17<2<2<5<2<4<2<4<12<2<2<20<7MW-LS-111S06/26/13<12<10<1<1<3<1<2<1<2<18<1<1<21<7MW-LS-111S09/25/13<23<21<2<3<6<2<4<3<5<14<2<2<24<8RW-LS-100S06/25/13<12 36+/-24<1<1<3<1<2<1<2<13<1<1<16<5RW-LS-100S12/05/13<53<98<5<5<10<5<11<6<10<14<4<5<35<10TW-LS-116S12/05/13<47<50<4<5<11<4<9<6<10<15<5<5<36<11TW-LS-118S12/05/13<33<80<4<4<7<4<8<4<8<12<4<4<25<8TW-LS-119S12/05/13<47<106<5<5<15<6<11<6<10<13<5<5<32<12BOLDED VALUES INDICATE LLD COULD NOT BE MET DUE TO AGE OF SAMPLE AT TIME OF RECEIPT AT THE LABORATORY TABLE B-I.3CONCENTRATIONS OF HARD TO DETECTS IN GROUNDWATER SAMPLES COLLECTED AS PART OFTHE RADIOLOGICAL GROUNDWATER PROTECTION PROGRAM, LASALLE COUNTY STATION, 2013RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMASITECOLLECTIONAm-241 Cm-242 Cm-243/244 Pu-238 Pu-239/240 U-234 U-235 U-238 Fe-55Ni-63DATEHP-512/09/13<0.09<0.04<0.02<0.11<0.130.49+/-0.24<0.120.61+/-0.26MW-LS-104S06/25/13<0.09<0.06<0.07<0.12<0.070.88+/-0.25<0.020.97+/-0.27<64<3.4MW-LS-105S12/06/13<0.08<0.06<0.09<0.06<0.121.86+/-0.53<0.100.96+/-0.36<148<5.0MW-LS-107S12/06/13<0.02<0.02<0.02<0.13<0.145.64+/-0.82<0.043.11+/-0.56<108<4.7MW-LS-111S12/19/13<0.09<0.07<0.02<0.11<0.1221.2+/-1.880.86+/-0.2611.6+/-1.17<137<4.1RW-LS-100S06/25/13<0.09<0.05<0.02<0.15<0.11<0.02<0.04<0.02<104<3.3RW-LS-100S09/24/13<0.14<0.08<0.09<0.09<0.16<0.14<0.10<0.20<82<3.9 TABLE B-II.1CONCENTRATIONS OF TRITIUM, STRONTIUM, GROSS ALPHA AND GROSSBETA IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OFLASALLE COUNTY STATION, 2013RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMACOLLECTIONSITEDATEH-3Sr-89Sr-90Gr-A (Dis)Gr-A (Sus)Gr-B (Dis)Gr-B (Sus)SW-LS-10103/29/13<173SW-LS-10106/26/13<190SW-LS-10109/25/13<173SW-LS-10112/05/13Original 263+/-129SW-LS-10112/05/13Recount 221+/-126SW-LS-10112/05/13Reanalysis 193+/-123SW-LS-10203/29/13 692+/-144SW-LS-10206/26/13<185SW-LS-10209/25/13 3290+/-375SW-LS-10212/05/13 1320+/-190SW-LS-10303/29/13 315+/-125SW-LS-10306/26/13 235+/-131SW-LS-10309/25/13 927+/-153<3.9<0.7<1.2<0.814.3+/-1.5<1.6SW-LS-10312/05/13 1020+/-173SW-LS-10603/29/13 283+/-124SW-LS-10606/25/13 284+/-133SW-LS-10609/25/13 1060+/-167<3.5<0.5<1.2<0.912.2+/-1.4<1.7SW-LS-10612/11/13 1050+/-177 TABLE B-II.2CONCENTRATIONS OF GAMMA EMITTERS IN SURFACE WATERSAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2013RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMASITECOLLECTIONBe-7K-40Mn-54Co-58Fe-59Co-60Zn-65Nb-95Zr-95I-131Cs-134Cs-137Ba-140La-140DATESW-LS-10106/26/13<20<17<2<2<5<2<4<2<4<23<2<2<29<10SW-LS-10109/25/13<19<15<2<2<4<2<3<2<4<9<2<2<18<5SW-LS-10206/26/13<10<8<1<1<2<1<2<1<2<13<1<1<15<5SW-LS-10306/26/13<13<26<1<1<4<1<2<1<2<18<1<1<22<8SW-LS-10309/25/13<20 49+/-28<2<2<5<2<4<2<4<10<2<2<19<5SW-LS-10606/25/13<16<31<1<1<3<1<2<1<3<25<1<1<25<6SW-LS-10609/25/13<25<19<2<3<5<2<5<3<5<13<2<2<22<7BOLDED VALUES INDICATE LLD COULD NOT BE MET DUE TO AGE OF SAMPLE AT TIME OF RECEIPT AT THE LABORATORY

@@ Line 3: / Line 3: @@
 | issue date = 05/15/2014
 | title = Annual Radiological Environmental Operating Report
-| author name = Karaba P J
+| author name = Karaba P
 | author affiliation = Exelon Generation Co, LLC
 | addressee name =

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