ML062980314

Annual Radiological Environmental Operating Report

ML062980314
Person / Time
Site:	LaSalle
Issue date:	05/15/2006
From:	Landahl S Exelon Generation Co, Exelon Nuclear
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
FOIA/PA-2010-0209, RA06-35
Download: ML062980314 (204)

Text

Exelkn., Exelon Generation Company, LLC www.exeloncorp.com Nuclear LaSalle County Station 2601 North 21"Road Marseilles, I L 61341-9757 RA06-35 May 15, 2006 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-1 1 and NPF-18 NRC Docket Nos. 50-373 and 50-374

Subject:

2005 Annual Radiological Environmental Operating Report Enclosed is the Exelon Generation Company, LLC, LaSalle County Station 2005 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.Should you have any questions concerning this letter, please contact Mr. Terrence Simpkin, Regulatory Assurance Manager, at (815) 415-2800.Respectfully, SusanR. LandaSs R Site Vice President LaSalle County Station Attachment cc: Regional Administrator

-NRC Region III NRC Senior Resident Inspector

-LaSalle County Station

\Docket No: 50-373 50-374 LASALLE COUNTY STATION UNITS 1 and 2 Annual Radiological Environmental Operating Report 1 January Through 31 December 2005 Prepared By Teledyne Brown Engineering Environmental Services Nuclear LaSalle County Generating Station Marseilles, IL 61341 May 2006 1 ni&a J,./

Table Of Contents I. Sum m ary and Conclusions

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1 II. Introduction

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2 A. O bjectives of the REM P ...................................................................................

2 B. Im plem entation of the O bjectives

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2 Ill. Program Description

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2 A. Sam ple Collection

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2 B. Sam ple Analysis ................................................................................................

5'C. Data Interpretation

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5 D. Program Exceptions

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7 E. Program Changes .............................................................................................

8 IV. Results and Discussion

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8 A. Aquatic Environm ent ........................................................................................

8 1. Surface W ater .........................................................................................

8 2. G round/well W ater ..................................................................................

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

9 4. Sedim ent ..............................................................................................

10 B. Atm ospheric Environm ent ...............................................................................

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

10 a. Air Particulates

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10 b. Airborne Iodine ..........................................................................

11 2. Terrestrial

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12 a. Milk ............................................

12 b. Food Products ..........................................................................

12 C. Am bient Gam m a Radiation

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12 D. Land Use Survey ...........................................................................................

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

13 2 of 203 Appendices Appendix A Radiological Environmental Monitoring Report Summary Tables Table A-1 Appendix B Tables Table B-1: Table B-2: Radiological Environmental Monitoring Program Summary for the LaSalle County Station, 2005 Location Designation, Distance & Direction, and Sample Collection

&Analytical Methods Radiological Environmental Monitoring Program -Sampling Locations, Distance and Direction, LaSalle County Station, 2005 Radiological Environmental Monitoring Program -Summary of Sample Collection and Analytical Methods, LaSalle County Station, 2005 Fijur Figure B-1: Figure B-2: Figure B-3: Figure B-4: Appendix C Table C-1.1 Table C-l.2 Table C-1.3 Table C-11.1 Inner Ring TLD Locations of the LaSalle County Station, 2005 Outer Ring TLD Locations of the LaSalle County Station, 2005 Fixed Air Sampling Locations of the LaSalle County Station, 2005 Ingestion and Waterborne Exposure Pathway Sample Locations of the LaSalle County Station, 2005 Data Tables and Figures -Primary Laboratory Concentrations of Gross Betb in Surface Water Samples Collected in the Vicinity of LaSalle Countj Station, 2005.Concentrations of Tritium in Surface Water Samples Collected in the Vicinity of LaSalle County Station, 2005.Concentrations of Gamma Emitters in Surface Water Samples Collected in the Vicinity of LaSalle County Station, 2005.Concentrations of Tritium in Ground/well Water Samples Collected in the Vicinity of LaSalle County Station, 2005 3 of 203 11, AN Table C-11.2'Table C-111.1 Table C-IV.1 Table C-V.1 Table C-V.2 Table 'C-V.3 Table C-VI.1-Table C-VII.1 Table C-VII.2 Table C-VIIl.1 Table C-IX.1 Table C-IX.2 Table C-IX.3 Table C-X.1 Concentrations of Gamma Emitters in Ground/well Water Samples Collected in the Vicinity of LaSalle County Station, 2005.Concentrations of Gamma Emitters in Fish Samples Collected in the Vicinity of LaSalle County Station, 2005.Concentrations of Gamma Emitters in Sediment Samples Collected in the Vicinity of LaSalle County Station, 2005.Concentrations of Gross Beta in Air Particulate Samples Collected in the Vicinity of LaSalle County Station, 2005.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, 2005.Concentrations of Gamma Emitters in Air Particulate Samples Collected in the Vicinity of LaSalle County Station, 2005.Concentrations of 1-131 in Air Iodine Samples Collected in the Vicinity of LaSalle County Station, 2005.Concentrations of 1-131 in Milk Samples Collected in the Vicinity of LaSalle County Station, 2005.Concentrations of Gamma Emitters in Milk Samples Collected in the Vicinity of LaSalle County Station, 2005.Concentrations of Gamma Emitters in Vegetation Samples Collected in the Vicinity of LaSalle County Station, 2005.Quarterly TLD Results for LaSalle County Station, 2005.Mean Quarterly TLD Results for the Inner Ring, Outer Ring, Other and Control Locations for LaSalle County Station, 2005.Summary of the Ambient Dosimetry Program for LaSalle County Station, 2005.Summary of Collection Dates for Samples Collected in the Vicinity of LaSalle County Station, 2005.Figures Figure C-1 Figure C-2 Figure C-3 Figure C-4 Surface Water -Gross Beta T Stations L-21 and L-40 Collected in the Vicinity of LCS, 2000 -2005.j Surface Water -Tritium -Stations L-21 (C) and L-40 Collected in the Vicinity of LCS, 2000 -2005.j Air Particulate

-Gross Beta -Stations L-01 and L-03 Collected in the Vicinity of LCS, 2000 -2005.Air Particulate

-Gross Beta -Stations L-05 and L-06 Collected in the Vicinity of LCS, 2000 -2005.iii 4 of 203 Figure C-5 Figure C-6 Figure C-7 Appendix D Tables Table D-1 Table D-2 Table D-3 Table D-4 Table D-5 Appendix E Appendix F Air Particulate

-Gross Beta -Station L-1O (C) Collected in the Vicinity of LCS, 2000 -2005.Air Particulate

-Gross Beta -Station L-04 and L-07 Collected in the Vicinity of LCS, 2005.Air Particulate

-Gross Beta -Station L-08 and L-1 1 Collected in the Vicinity of LCS, 2005.Inter-Laboratory Comparison Program Analytics Environmental Radioactivity Cross Check Program Teledyne Brown Engineering, 2005 ERA Environmental Radioactivity Cross Check Program Teledyne Brown Engineering, 2005 DOE's Mixed Analyte Performance Evaluation Program (MAPEP)Teledyne Brown Engineering, 2005 ERA Statistical Summary Proficiency Testing Program Environmental, Inc., 2005 DOE's Mixed Analyte Performance Evaluation Program (MAPEP)Environmental, Inc., 2005 Effluent Data Meteorological Data iv 5 of 203

1. Summary and Conclusions This report on the Radiological Environmental Monitoring Program conducted for the LaSalle County Station (LCS) by Exelon covers the period 1 January 2005 through 31 December 2005. During that time period, 1,043 analyses were performed on 957 samples. In assessing all the data gathered for this report and comparing these results with preoperational data, it was concluded that the operation of LCS 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.

Sediment samples had Cs-1 37 concentrations consistent-with levels observed during the preoperational years. No plant produced fission or activation products were found in sediment.Air particulate samples were analyzed for concentrations of gross beta and gamma emitting nuclides.

No fission or activation products were detected.High sensitivity 1-131 analyses were performed on bi-weekly air samples. All results were less than the minimum detectable activity.Cow milk samples were analyzed for concentrations of 1-131 and gamma emitting nuclides.

All 1-131 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 thermoluminescent dosimeters.

Levels detected were consistent with those observed in previous years.6 of 203 II. Introduction The LaSalle County Station (LCS), consisting-of two boiling water reactors, each rated for 3489 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.A Radiological Environmental Monitoring Program (REMP) for LCS 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), Global Dosimetry, and Environmental Inc. (Midwest Labs) on samples collected during the period 1 January 2005 through 31 December 2005.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 tLose media before and during Station operation to assess Statidn radiological effects (if any) on man and the environment.

II1. Program Description A. Sample Collection Samples for the LCS REMP were collected for Exelon Nuclear by-2-7 of 203 Environmental Inc. (Midwest Labs). This section describes the general collection methods used by Environmental Inc. (Midwest Labs) to obtain environmental samples for the LCS REMP in 2005. Sample locations and descriptions can be found in Tables B-1 and B-2, and Figures B-1 through B-4, Appendix B.Aquatic Environment The aquatic environment was evaluated by performing radiological analyses on samples of surface water, ground/well water, fish, and sediment.

Two gallon water samples were collected weekly from two-surface water locations (L-21 and L-40) and composited for monthly and quarterly required analyses.

Control location was L-21. Two ground/well water locations (L-27 and L-28) werealso grab sampled quarterly.

All samples were collected in new unused plastic bottles, which were rinsed with source water prior to collection.

Fish samples comprising the flesh of largemouth bass, smallmouth bass, channel catfish, bluegill, carp, freshwater drum and smallmouth buffalo were collected semiannually at three locations, L-34, L-35 and L-36 (Control).

Sediment samples composed of recently deposited substrate were collected at two locations semiannually, L-40 and L-41.Atmospheric Environment The atmospheric environment was evaluated by performing radiological analyses on samples of air particulate, airborne iodine, milk and food products.

Airborne iodine and particulate samples were collected and analyzed weekly at nine locations (L-01, L-03, L-04, L-05, L-06, L-07, L-08, L-1 0 and L-1 1). The control location was L-1 0. Airborne iodine and particulate samples were obtained at each location, using a vacuum pump with charcoal and glass fiber filters attached.

The pumps were run continuously and sampled air at the rate of approximately one cubic foot per minute. The filters were replaced weekly and sent to the laboratory for analysis.

The air iodine samples were replaced biweekly and sent to the lab for analysis.Milk samples were collected biweekly at one location (L-42) from May through October, and monthly from November through April. The control location was L-42. All samples were collected in new unused two gallon plastic bottles from the bulk tank at each location, preserved with sodium bisulfite, and shipped promptly to the laboratory.

Food products were collected annually in September at five locations (L-Quad C, L-Quad 1, L-Quad 2, L-Quad 3, and L-Quad 4). The control-3-8 of 203 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 Direct radiation measurements were made using CaF 2 thermoluminescent dosimeters (TLD). Each location consisted of 2 TLD sets. The TLD locations were placed on and around the LCS 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-1 15 and L-1 16) 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 LCS release.An oute.r.ing 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, 1-215 and-L-216) extending to approximately 5 miles from the site designed to measure possible exposures to close-in population.

An other set consisting of eight locations (L-01, L-03, L-04, L-05, L-06, L-07, L-08 and L-1 1.The balance of one location (L-10) representing the control area.The specific TLD 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 LCS, 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 TLDs -each comprised of two CaF 2 thermoluminescent phosphors enclosed in plastic -were placed at each location in a PVC conduit located approximately six feet above ground level. The TLDs were exchanged quarterly and sent to Global Dosimetry for analysis.-4-9 of 203 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' LCS REMP in 2005. 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 1-131 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) was 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 was intended as a before the fact estimate of a system (including instrumentation, procedure and sample type) and not as an after the fact criteria for the presence of activity.

All analyses were designed to achieve the required LCS detection capabilities for environmental sample analysis.The minimum detectable concentration (MDC) is defined above-5-10 of 203 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 12 nuclides, Mn-54, Co-58, Fe-59, Co-60, Zn-65, Zr-95, Nb-95, 1-131, Cs-134, Cs-137, Ba-140, and La-140 were reported.For ground/well water 11 nuclides, Mn-54, Co-58, Fe-59, Co-60, Zn-65, Zr-95, Nb-95, Cs-1 34, Cs-1 37, Ba-140, and La-140 were reported.For fish nine nuclides, Mn-54, Co-58, Fe-59, Co-60, Zn-65, Nb/Zr-95, Cs-134, Cs-137 and Ba/La-140 were reported.For sediment nine nuclides, Mn-54, Co-58, Fe-59, Co-60, Zn-95, Nb/Zr-95, Cs-134, Cs-137 and Ba/La-140 were reported.For air particulate nine, Mn-54, Co-58, Fe-59, Co-60, Zn-65, Nb/Zr-95, Cs-134, Cs-137 and Ba/La-140 were reported.For milk 10 nuclides, Mn-54, Co-58, Fe-59, Co-60, Zn-65, Nb/Zr-95, Cs-134, Cs-137, Ba-140 and La-140 were reported.For food products 10 nuclides, Mn-54, Co-58, Fe-59, Co-60, Zn-65, Nb/Zr-95, 1-131, Cs-134, Cs-137 and Ba/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. 11 of 203 D. Program Exceptions For 2005 the LCS 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 AI L-07 01-27-05 No apparent reason for low reading of 148.9 hours1.041667e-4 days <br />0.0025 hours <br />1.488095e-5 weeks <br />3.4245e-6 months <br />; collector will check timer meter next collection period.A L-04 05-12-05 No vacuum due to pump malfunction; collector replaced pump.A/I L-06 08/10/05 Low reading of 109.1 hours1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> due to power outage; station Point of Contact notified.A L-06 08/17/05 Low reading of 144.6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> due to recent power restoration.

TLD Other 09/29/05 TLD-214-4 found with broken case; TLD plate present.Table D-2 LISTING OF MISSFD SAMPLES Sample Location Collection Reason Type Code Date TLD Other 09-29-05 TLD -214-3 found missing during quarterly exchange; collector placed new fourth quarter TLD.Each program exception was.reviewed to understand the causes of the program exception.

Sampling and maintenance errors were reviewed with the personnel involved to prevent recurrence.

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. 12 of 203 E. Program Changes Beginning the third quarter 2005, Teledyne Brown Engineering Environmental Services became the primary laboratory and Environmental Inc. (Midwest Labs) became the QC laboratory.

Due to the change, the data tables and summary table presented in this report will appear different from previously submitted reports. This year, only the detected and non-detected results will be presented in the data tables. As a result of this change, the first half of the year data tables will display LLD (Lower Limit of Detection) values for non-detected nuclides and the second half of the year-data tables will display MDC (Minimum Detectable Concentration) values for non-detected nuclides.

The summary table will include a longer list of gamma nuclides.

The data points for non-detects in the figures will consist of LLD values for the first half of the year and MDC values for the second half of the year.Far field air particulate filter samples are analyzed when the respective near field sample results are inconsistent with previous measurements and radioactivity is confirmed as having its origin in airborne effluents from the station, orat the discretion of the Radiological Environmental Monitoring Program (REMP) Coordinator.

Starting with the third quarter of 2005, all far-field air particulate samples were analyzed.The air iodine samples were replaced biweekly and sent to the lab for analysis.

Five locations were analyzed weekly (L-01, L-03, L-05, L-06 and L-10) for the first half of the year, per the Quad Cities ODCM. All nine locations were analyzed the second half of the year.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-1.1, Appendix C). The values ranged from-8-13 of 203

<4.0 to 10.4 pCi/I. Concentrations detected were consistent with those detected in previous years (Figure C-1, Appendix C). The required LLD was met.Tritum Quarterly composites of weekly collections were analyzed for tritium activity (Table C-1.2, Appendix C). The values ranged from<187 to 943 pCi/l. Concentrations detected were consistent with those detected in previous years (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-1.3, 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). These locations could be affected by LaSalle's effluent releases.

The following analyses were performed:

Titium Quarterly grab samples from the locations were analyzed for tritium activity (Table C-I1.1, 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-11.2, Appendix C). No nuclides were detected, and all required LLDs were met.3. Fish Fish samples comprised largemouth bass, smallmouth bass, channel catfish, bluegill, carp, freshwater drum and smallmouth buffalo 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: 14 of 203 Gamma Spectrometry The edible portion of fish samples from both locations was analyzed for gamma emitting nuclides (Table C-I11.1, Appendix C)., Naturally occurring K-40 was found at all stations and ranged from 2,690 to 4,200 pCi/kg wet. No fission or activation products were found.4. Sediment Aquatic sediment samples were collected at two locations (L-40 and L-41) semiannually.

Both locations, located downstream, could be affected by LaSalle's effluent releases.

The following analysis was performed:

Gamma Spectrometry Sediment samples from both locations were analyzed for gamma emitting nuclides (Table C-IV.1, Appendix C). Nuclides detected were naturally occurring K40, Ra-226 and Th-232.K-40 and Th-232 were found at both stations and ranged from 12,900 to 17,800 pCi/kg dry and 440 to 835 pCi/kg dry, respectively.

Ra-226 was found in one sample at a concentration of 3950 pCi/kg dry. 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 LCS site boundary (L-05 and L-06), Group II (near site) represents the locations near the LCS site (L-01 and L-06), Group III (far field) represents the control location at an intermediate distance from LCS (L-04, L-07, L-08 and L-1 1) and Group IV (Control) represents the control location at a remote distance (L-10). Far field samples are analyzed when the respective near field sample results are inconsistent with previous measurements and radioactivity is confirmed as having its origin in airborne-10-15 of 203 effluents from the station, or at the discretion of the Radiological Environmental Monitoring Program (REMP)Coordinator.

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 LCS. The results from the OnSite locations (Group I) ranged from 7 to 45 E-3 pCi/m 3 with a mean of 22 E-3 pCi/m 3.The results from the near site location (Group II) ranged from 9 to 43 E-3 pCi/m 3 with a mean of 23 E-3 pCi/m 3.The results from the far field locations (Group Ill) ranged from 7 to 48 E-3 pCi/m 3 with a mean of 23 E-3 pCi/mi. The results from the Control location (Group IV) ranged from 10 to 47 E-3 pCi/m 3 with a mean of 24 E-3 pCi/mn 3.Comparison of the 2005 air particulate data with previous years data indicate no effects from the operation of LCS (Figures C-3 through C-7, Appendix C). In addition a comparison of the weekly mean values for 2005 indicate no notable differences among the three groups.Gnmma 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 64 to 172 E-3 pCi/m 3.Naturally occurring K-40 was detected in 2 samples at concentrations of 19 and 25 E-3 pCi/in 3.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-07, L-08, L-10, L-14, and L-53)and analyzed weekly for 1-131 (Table C-VI.1, Appendix C).Far field samples are analyzed when the respective near field sample results are inconsistent with previous measurements and radioactivity is confirmed as having its origin in airborne effluents from the station, or at the discretion of the REMP Coordinator.

No nuclides were-11 -16 of 203 detected, and 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:

Jfldinefll3 Milk samples from the location were analyzed for concentrations of 1-131 (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 1,230 to 1,680 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 Panasonic 814 (CaF2) thermoluminescent dosimeters.

Forty-one TLD locations were established around the site. Results of TLD measurements are listed in Tables C-IX.1 to C-IX.3, Appendix C.-12-17 of 203 Most TLD measurements were below 30 mR/standard month, with a range of 19 to 34 mR/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-1 0 were comparable.

D. Land Use Survey A Land Use Survey conducted during the August 2005 growing season around the LaSalle County Station (LCS) 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 / degree sectors around the site. The distance and direction of all locations from the LCS reactor buildings were positioned using Global Positioning System (GPS) technology.

There were no changes required to the LCS REMP, as a result of this survey.The results of this survey are summarized below.Distance in Miles from the LCS Reactor Buildings Sector Residence Livestock Milk Farm Miles Miles Miles A N 3.9 4.0 B NNE 1.6 1.7 CNE 2.1 3.5 D ENE 3.3 3.8 -E E 3.2 -12.6 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 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. 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-13-18 of 203 Performance Evaluation Program (MAPEP), were evaluated against ttie 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 primary laboratory, 18 out of 19 analytes met the specified acceptance criteria.

One sample did not meet the specified acceptance criteria for the following reason: 1. Teledyne Brown Engineering's Analytics' September 2005 air particulate Fe-59 ratio of 1.35 exceeded the upper control limit of 1.30 due a new technician not counting the air particulate in a petri dish.For the secondary laboratory, 19 out of 23 analytes met the specified-14-19 of 203 acceptance criteria.

Four samples did not meet the specified acceptance criteria for the following reasons: 1. Environmental Inc.'s ERA's November 2005 water Gross Alpha result of 41.1 pCi/L exceeded the upper control limit of 33.4 pCi/L.This was due to using an Am-241 efficiency instead of a Th-232 efficiency when counting the sample. Using the correct efficiency gave a result of 27.0 pCi/L.2. Environmental Inc.'s ERA's November 2005 water Ra-228 result of 5.5 pCi/L exceeded the upper control limit of 5.0 pCi/L due to presence of radium daughters.

Delay in counting 100 minutes gave a result of 4.01 pci/L.3. Environmental Inc.'s MAPEP's January 2005 air particulate Sr-90 result of 2.2 exceeded the upper control limit of 1.76 Bq/kg.Reanalysis result was 1.56 Bq/kg.4. Environmental Inc.'s MAPEP's July 2005 soil Am-241 result of 48.4 exceeded the lower control limit of 56.77 Bq/kg due to incorrect sample weight being used in the calculation.

When recalculated with the correct sample weight, the result was 97.0 Bq/kg.The Inter-Laboratory Comparison Program provides evidence of "in control" counting systems and methods, and that the laboratories are producing accurate and reliable data.-15-20 of 203 APPENDIX A RADIOLOGICAL ENVIRONMENTAL MONITORING REPORT QUARTERLY AND ANNUAL

SUMMARY

21 of 203 1ý1 TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 1ST QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2005 NAME OF FACILITY:

LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY:

MARSEILLES, IL REPORTING PERIOD: 1ST QUARTER, 2005 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTIME (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS SURFACE WATER (PCI/LITER)

GR-B 6 2 H-3 GAMMA MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 6 4 5.2 (1/3)200 <LLD 15 -<LLD 15 <LLD 30 <LLD 15 <LLD 30 <LLD 15 <LLD 7.3 (2/3)(5.3/9.3)7.3 (2/3)(5.3/9.3)L-21 CONTROL ILLINOIS RIVER AT SENECA -UPSTREAM 4.0 MILES NE OF SITE<LLD 0 0<LLD<LLD<LLD<LLD<LLD<LLD 0 0 0 0 0 0 N, 0 AJJ MEAN AND RANGE BASED ON DETECTABLE MEASUREMENTS ONLY (M)FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 1ST QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2005 NAME OF FACILITY:

LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY:

MARSEILLES, IL REPORTING PERIOD: 1ST QUARTER, 2005 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) -NAME NONROUTIME (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS ZR-95 1-131 CS-134 CS-137 BA-140 LA-140 30 <LLD 15 <LLD 15 <LLD 18 <LLD 60 <LLD 15 <LLD 200 <LLD<LLD<LLD<LLD<LLD<LLD<LLD 0 0 0 0 0 0 GROUND/WELL WATER (PCI/LITER)

H-3 N/A 0 GAMMA MN-54 2 15 <LLD N/A 0 0 t'3 0 MEAN AND RANGE BASED ON DETECTABLE MEASUREMENTS ONLY (M)FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-i RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 1ST QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2005 NAME OF FACILITY:

LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY:

MARSEILLES, IL REPORTING PERIOD: 1ST QUARTER, 2005 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTIME (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 CS-134 CS-137 15 <LLD 30 <LLD 15 <LLD 30 <LLD 15 <LLD 30 <LLD 15 <LLD 18 <LLD N/A N/A N/A N/A N/A N/A N/A N/A 0 0 0 0 0 0 0 0 0 L-h MEAN AND RANGE BASED ON DETECTABLE MEASUREMENTS ONLY (M)FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 1ST QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2005 NAME OF FACILITY:

LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY:

MARSEILLES, IL REPORTING PERIOD: 1ST QUARTER, 2005 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTIME (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS BA-140 LA-140 AIR PARTICULATE (E-3 PCI/CU.METER)

GR-B 65 5 GAMMA MN-54 60 <LLD 15 <LLD 10 25 (52/52)(14/38)N/A <LLD N/A <LLD N/A <LLD N/A <LLD N/A <LLD N/A N/A 0 CO-58 FE-59 CO-60 ZN-65 27 (13/13)(18/42)<LLD<LLD<LLD<LLD<LLD 27 (13/13)(18/42)0 0 0 0 0 L-10 CONTROL STREATOR 13.5 MILES SW OF SITE 0 0 N)0 to3 0 MEAN AND RANGE BASED ON DETECTABLE MEASUREMENTS ONLY (M)FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 1ST QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2005 NAME OF FACILITY:

LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY:

MARSEILLES, IL REPORTING PERIOD: 1ST QUARTER, 2005 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTIME (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND.DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS ZRNB-95 CS-134 CS-137 BALA-140 N/A <LLD 50 <LLD 60 <LLD N/A <LLD 70 <LLD I N/A<LLD<LLD<LLD<LLD<LLD<LLD 0 0 0 AIR IODINE (E-3 PCI/CU.METER) 1-131 1-131 30 3 0 MILK (PCI/LITER) 0 GAMMA MN-54 CO-58 N/A N/A N/A N/A<LLD<LLD 0 0 t'j 0 t'j 0 (JJ MEAN AND RANGE BASED ON DETECTABLE MEASUREMENTS ONLY (M)FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 1ST QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2005 NAME OF FACILITY:

LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY:

MARSEILLES, IL REPORTING PERIOD: 1ST QUARTER, 2005 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTIME (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS FE-59 CO-60 ZN-65 ZRNB-95 CS-134 CS-137 BA-140 LA-140 N/A N/A N/A N/A N/A N/A N/A N/A 15 N/A 18 N/A 60 N/A 15 N/A<LLD<LLD<LLD<LLD<LLD<LLD<LLD<LLD 0 0 0 0 0>0 0 0-- 0 0 t-h C)0j MEAN AND RANGE BASED ON DETECTABLE MEASUREMENTS ONLY (M)FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 1ST QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2005 NAME OF FACILITY:

LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY:

MARSEILLES, IL REPORTING PERIOD: 1ST QUARTER, 2005 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTIME (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS DIRECT RADIATION (MILLI-ROENTGEN/STD.MO.

TLD-QUARTERLY 84 N/A 27.6 (82/82)(21/32)27.0 (2/2)(27/27)32.0 (1/1)L-102-2* INDICATOR 0.6 MILES NNE OF SITE 0 0* Locations L-105-1 & -2 and L-204-1 had identical results of 32.0 mR. Only L-102-2 is detailed in this summary.MEAN AND RANGE BASED ON DETECTABLE MEASUREMENTS ONLY (M)FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-i RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 2ND QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2005 NAME OF FACILITY:

LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY:

MARSEILLES, IL REPORTING PERIOD: 2ND QUARTER, 2005 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTIME (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS SURFACE WATER (PCI/LITER)

GR-B 6 2 H-3 GAMMA MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 4 5.1 (3/3)(4.1/6.6)200 244 (1/1)15 <LLD 15 <LLD 30 <LLD 15 <LLD 30 <LLD 15 <LLD 4.9 (2/3)(4.2/5.7)<LLD 5.1 (3/3)(4.1/6.6)244 (1/1)L-40 INDICATOR ILLINOIS RIVER -DOWNSTREAM 5.2 MILES NNW OF SITE L-40 INDICATOR ILLINOIS RIVER -DOWNSTREAM 5.2 MILES NNW OF SITE 0<LLD<LLD<LLD<LLD<LLD<LLD 0 0 0 0 0 0 0 0 MEAN AND RANGE BASED ON DETECTABLE MEASUREMENTS ONLY (M)FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 2ND QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2005 NAME OF FACILITY:

LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY:

MARSEILLES, IL REPORTING PERIOD: 2ND QUARTER, 2005 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTIME (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS ZR-95 1-131 CS-134 CS-137 BA-140 LA-140 30 <LLD 15 <LLD 15 <LLD 18 <LLD 60 <LLD 15 <LLD 200 <LLD<LLD<LLD<LLD<LLD<LLD<LLD 0 0 0 0 t'0 0 0 GROUND/WELL WATER (PCI/LITER)

H-3 2 2 N/A GAMMA MN-54 15 <LLD N/A 0 w 0 0 It-i 0 wO MEAN AND RANGE BASED ON DETECTABLE MEASUREMENTS ONLY (M)FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 2ND QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2005 NAME OF FACILITY:

LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY:

MARSEILLES, IL REPORTING PERIOD: 2ND QUARTER, 2005 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) -NAME NONROUTIME (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS CO-58 FE-59 CO-60 ZN-65 N13-95 ZR-95 CS-134 CS-137 15 <LLD 30 <LLD 15 <LLD 30 <LLD 15 <LLD 30 <LLD 15 <LLD 18 <LLD N/A N/A N/A N/A N/A N/A N/A N/A 0 0 0 0 0 0-- 0 w F-1 0 t-t I-ti 0 wO MEAN AND RANGE BASED ON DETECTABLE MEASUREMENTS ONLY (M)FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-i RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 2ND QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2005 NAME OF FACILITY:

LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY:

MARSEILLES, IL REPORTING PERIOD: 2ND QUARTER, 2005 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTIME (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS FISH (PCI/KG WET)BA-140 LA-140 GAMMA MN-54 CO-58 FE-59 CO-60 ZN-65 ZRNB-95 6 60 <LLD 15 <LLD 130 -<LLD 130 <LLD 260 <LLD 130 <LLD 260 <LLD N/A <LLD N/A N/A 0 0<LLD<LLD<LLD<LLD<LLD<LLD 0 0 0 0 0 0 uiA N)0 t-ti t)0 (Ai MEAN AND RANGE BASED ON DETECTABLE MEASUREMENTS ONLY (M)FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 2ND QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2005 NAME OF FACILITY:

LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY:

MARSEILLES, IL REPORTING PERIOD: 2ND QUARTER, 2005 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTIME (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS CS-134 CS-137 BALA-140 GAMMA MN-54 SEDIMENT (PCI/KG)2 130 <LLD 150 <LLD N/A <LLD N/A <LLD N/A <LLD N/A <LLD N/A <LLD N/A <LLD<LLD<LLD<LLD 0 0 0 CO-58 FE-59 CO-60 ZN-65 N/A N/A N/A N/A N/A 0 0 0 0 0 0 0 (A)MEAN AND RANGE BASED ON DETECTABLE MEASUREMENTS ONLY (M)FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 2ND QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2005 NAME OF FACILITY:

LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY:

MARSEILLES, IL REPORTING PERIOD: 2ND QUARTER, 2005 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTIME (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS ZRNB-95 CS-134 CS-137 BALA-140 N/A <LLD 150 <LLD 180 <LLD N/A <LLD 10 22 (52/52)(14/45)N/A <LLD N/A <LLD N/A <LLD N/A N/A N/A N/A 0 0 0 0 0 AIR PARTICULATE (E-3 PCI/CU.METER)

GR-B 65 GAMMA MN-54 CO-58 FE-59 5 23 (13/13)(13/47)<LLD<LLD<LLD 23 (13/13)(16/38)L-6 INDICATOR NEARSITE 6 0.4 MILES WSW OF SITE 0 0 0 0 t'3 MEAN AND RANGE BASED ON DETECTABLE MEASUREMENTS ONLY (M)FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 2ND QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2005 NAME OF FACILITY:

LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY:

MARSEILLES, IL REPORTING PERIOD: 2ND QUARTER, 2005 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) -NAME NONROUTIME (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS CO-60 ZN-65 ZRNB-95 CS-134 CS-137 BALA- 140 N/A <LLD N/A <LLD N/A <LLD 50 <LLD 60 <LLD N/A <LLD 70 <LLD 1 N/A<LLD<LLD<LLD<LLD<LLD<LLD<LLD<LLD 0 0 0 0 0 0 0 AIR IODINE (E-3 PCI/CU.METER) 1-131 1-131 35 5 MILK (PCI/LITER)

-- 0 0 I-h N)C0 ui-MEAN AND RANGE BASED ON DETECTABLE MEASUREMENTS ONLY (M)FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 2ND QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2005 NAME OF FACILITY:

LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY:

MARSEILLES, IL REPORTING PERIOD: -2ND QUARTER, 2005 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN 'STATIONS

1. NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTIME (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS GAMMA MN-54 CO-58 FE-59 CO-60 ZN-65, ZRNB-95 CS-134 CS-137 5 00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 15 N/A 18 N/A<LLD<LLD<LLD<LLD<LLD<LLD<LLD<LLD 0 0 0 0 0 0 0 0 0 wA MEAN AND RANGE BASED ON DETECTABLE MEASUREMENTS ONLY (M)FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 2ND QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2005 NAME OF FACILITY:

LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY:

MARSEILLES, IL REPORTING PERIOD: 2ND QUARTER, 2005 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTIME (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS BA-140 LA-140 60 N/A 15 N/A<LLD<LLD 21.5 (2/2)(21/22)0 0 DIRECT RADIATION (MILLI-ROENTGEN/STD.MO.

TLD-QUARTERLY 84 N/A 23.0 (82/82)(19/28)28.0 (I/1)L-105-1 INDICATOR 0.7 MILES E OF SITE 0'.0 0 0 uj MEAN AND RANGE BASED ON DETECTABLE MEASUREMENTS ONLY (M)FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 3RD QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2005 NAME OF FACILITY:

LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY:

MARSEILLES, IL REPORTING PERIOD: 3RD QUARTER, 2005 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTIME (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS SURFACE WATER (PCI/LITER)

GR-B H-3 GAMMA MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 2 6 4 8.5 (3/3)(6.7/10.4) 200 <LLD 15 <LLD 15 <LLD 30 <LLD 15 <LLD 30 <LLD 15 <LLD 8.5 (3/3)(8.1/8.7)8.5 (3/3)(8.1/8.7)L-21 CONTROL ILLINOIS RIVER AT SENECA -UPSTREAM 4.0 MILES NE OF SITE 0 0<LLD<LLD<LLD<LLD<LLD<LLD<LLD 0 0 0 0 0 0 ('00 0 1-h MEAN AND RANGE BASED ON DETECTABLE MEASUREMENTS ONLY (M)FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 3RD QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2005 NAME OF FACILITY:

LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY:

MARSEILLES, IL REPORTING PERIOD: 3RD QUARTER, 2005 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTIME (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS ZR-95 1-131 CS-134 CS-137 BA-140 LA-140 30 <LLD 15 <LLD 15 <LLD 18 <LLD 60 <LLD 15 <LLD 200 <LLD<LLD<LLD<LLD<LLD<LLD<LLD 0 0 0 0 0 0 0 GROUND/WELL WATER (PCI/LITER)

H-3 2 2 N/A GAMMA MN-54 15 <LLD N/A 0 t~o 0 t'o 0 twJ MEAN AND RANGE BASED ON DETECTABLE MEASUREMENTS ONLY (M)FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 3RD QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2005 NAME OF FACILITY:

LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY:

MARSEILLES, IL REPORTING PERIOD: 3RD QUARTER, 2005 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTIME (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 CS-134 CS-137 15 <LLD 30 <LLD 15 <LLD 30 <LLD 15 <LLD 30 <LLD 15 <LLD 18 <LLD N/A N/A N/A N/A N/A N/A N/A N/A 0 0 0 0 0 0 0 0 0 o w'MEAN AND RANGE BASED ON DETECTABLE MEASUREMENTS ONLY (M)FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 3RD QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2005 NAME OF FACILITY:

LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY:

MARSEILLES, IL REPORTING PERIOD: 3RD QUARTER, 2005 INDICATOR CONTROL. LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) -NAME NONROUTIME (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS BA-140 LA-140 AIR PARTICULATE (E-3 PCI/CU.METER)

GR-B 117 GAMMA MN-54 9 60 <LLD 15 <LLD 10 20 (104/104)(7/47)N/A <LLD N/A <LLD N/A <LLD N/A <LLD N/A <LLD N/A N/A CO-58 FE-59 CO-60 ZN-65 23 (13/13)(11/43)<LLD<LLD<LLD<LLD<LLD -23 (13/13)(11/43)0 0 0 0 0 0 L-10 CONTROL STREATOR 13.5 MILES SW OF SITE 0 F.-4 0 O MEAN AND RANGE BASED ON DETECTABLE MEASUREMENTS ONLY (M)FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 3RD QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2005 NAME OF FACILITY:

LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY:

MARSEILLES, IL REPORTING PERIOD: 3RD QUARTER, 2005 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTIME (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS ZRNB-95 CS-134 CS-137 BALA140 N/A <LLD 50 <LLD 60 <LLD N/A <LLD 70 <LLD I N/A<LLD<LLD<LLD<LLD<LLD<LLD 0 0 0 0 0 0 AIR IODINE (E-3 PCI/CU.METER) 1-131 1-131 63 6 MILK (PCI/LITER)

GAMMA MN-54 6 N/A N/A N/A N/A<LLD<LLD 0 CO-58 I-h.0 w MEAN AND RANGE BASED ON DETECTABLE MEASUREMENTS ONLY (M)FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 3RD QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2005 NAME OF FACILITY:

LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY:

MARSEILLES, IL REPORTING PERIOD: 3RD QUARTER, 2005 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) -NAME NONROUTIME (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS FE-59 CO-60 ZN-65 ZRNB-95 CS-134 CS-137 BA-140 LA-140 N/A N/A N/A N/A N/A N/A N/A N/A 15 N/A 18 N/A 60 N/A 15 <LLD<LLD<LLD<LLD<LLD<LLD<LLD<LLD<LLD 0 0 0 0 0 0-- 0 F0 I-h 0 w MEAN AND RANGE BASED ON DETECTABLE MEASUREMENTS ONLY (M)FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 3RD QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2005 NAME OF FACILITY:

LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY:

MARSEILLES, IL REPORTING PERIOD: 3RD QUARTER, 2005 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTIME (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS FOOD PRODUCTS (PCI/KG WET).GAMMA MN-54 CO-58 FE-59 CO-60 ZN-65 ZRNB-95 1-131 CS-134 10 N/A <LLD N/A <LLD N/A <LLD N/A <LLD N/A <LLD N/A <LLD 60 <LLD 60 <LLD<LLD<LLD<LLD<LLD<LLD<LLD<LLD<LLD 0 0 0 0 0 0 0 0&b 0 ('-w'MEAN AND RANGE BASED ON DETECTABLE MEASUREMENTS ONLY (M)FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 3RD QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2005 NAME OF FACILITY:

LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY:

MARSEILLES, IL REPORTING PERIOD: 3RD QUARTER, 2005 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTIME (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS CS-137 BALA140 80 <LLD N/A <LLD N/A 24.5 (81/81)(19/28)<LLD<LLD 20.0 (2/2)(20/20)0 DIRECT RADIATION (MILLI-ROENTGEN/STD.MO.

TLD-QUARTERLY 83 28.0 (1/1)L-102-2* INDICATOR 0.6 MILES NNE OF SITE 0 cc 41.0 (A)* Location L-210-2 had identical results of 28.0 mR. Only L-1 02-2 is detailed in this summary.MEAN AND RANGE BASED ON DETECTABLE MEASUREMENTS ONLY (M)FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 4TH QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2005 NAME OF FACILITY:

LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY:

MARSEILLES, IL REPORTING PERIOD: 4TH QUARTER, 2005 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTIME (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS SURFACE WATER (PCI/LITER)

GR-B 6 H-3 GAMMA MN-54 2 6 CO-58 FE-59 CO-60 ZN-65 NB-95 4 9.4 (3/3)(7.8/10.2) 200 821 (1/1)15 <LLD 15 <LLD 30 <LLD 15 <LLD 30 <LLD 15 <LLD 9 (3/3)(7.6/10.7) 9.4 (3/3)(7.8/10.2)

L-40 INDICATOR ILLINOIS RIVER -DOWNSTREAM 5.2 MILES NNW OF SITE L-21 CONTROL ILLINOIS RIVER AT SENECA -UPSTREAM 4.0 MILES NE OF SITE 943 (1/l)<LLD<LLD<LLD<LLD<LLD<LLD 943 (i/i)0 0 0 0 0 0 0 t-h K)0 1jl TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 4TH QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2005 NAME OF FACILITY:

LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY:

MARSEILLES, IL REPORTING PERIOD: 4TH QUARTER, 2005 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTIME (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS ZR-95 1-131 CS-134 CS-137 BA-140 LA-140 30 <LLD 15 <LLD 15 <LLD 18 <LLD 60 <LLD 15 <LLD 200 <LLD<LLD<LLD<LLD<LLD<LLD<LLD 0 0 0 Is)0 0 0 0 GROUND/WELL WATER (PCI/LITER)

H-3 2 N/A GAMMA MN-54 2 15 <LLD N/A 0 TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 4TH QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2005 NAME OF FACILITY:

LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY:

MARSEILLES, IL REPORTING PERIOD: 4TH QUARTER, 2005 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTIME (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 CS-134 CS-137 15 <LLD 30 <LLD 15 <LLD 30 <LLD 15 <LLD 30 <LLD 15 <LLD 18 <LLD N/A N/A N/A N/A N/A N/A N/A N/A 0 0 0 0 0 0 0 0 its 00 0 w TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 4TH QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2005 NAME OF FACILITY:

LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY:

MARSEILLES, IL REPORTING PERIOD: 4TH QUARTER, 2005 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTIME (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS FISH (PCI/KG WET)BA-140 LA-140 GAMMA MN-54 CO-58 FE-59 CO-60 ZN-65 ZRNB-95 60 <LLD 15 <LLD 130 <LLD 130 <LLD 260 <LLD 130 <LLD 260 <LLD N/A <LLD N/A N/A 0 0<LLD<LLD<LLD<LLD<LLD<LLD 0 0 0 0 0 0-t~i 0 w-.

TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 4TH QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2005 NAME OF FACILITY:

LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY:

MARSEILLES, IL REPORTING PERIOD: 4TH QUARTER, 2005 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTIME (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS CS-134 CS-137 BALAI40 GAMMA MN-54 SEDIMENT (PCI/KG DRY)2 130 <LLD 150 <LLD N/A <LLD N/A <LLD N/A <LLD N/A <LLD N/A <LLD N/A <LLD<LLD<LLD<LLD 0 0 0 CO-58 FE-59 CO-60 ZN-65 N/A N/A N/A N/A N/A 0 0 0 0 0 U, 0 0 t-h 1'3 K)=0 w TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 4TH QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2005 NAME OF FACILITY:

LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY:

MARSEILLES, IL REPORTING PERIOD: 4TH QUARTER, 2005 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTIME (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS ZRNB-95 CS-134 CS-137 BALA140 N/A <LLD 150 <LLD 180 <LLD N/A <LLD 10 23 (104/104)(9/48)N/A <LLD N/A <LLD N/A <LLD N/A N/A N/A N/A 0 0 0 0 0 AIR PARTICULATE (E-3 PCI/CU.METER)

GR-B 117 24 (13/13)(10/41)26 (13/13)(12/48)L-I I INDICATOR RANSOM 6.0 MILES S OF SITE GAMMA MN-54 CO-58 FE-59 9<LLD<LLD<LLD 0 0 0 I.-I 0 TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 4TH QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2005 NAME OF FACILITY:

LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY:

MARSEILLES, IL REPORTING PERIOD: 4TH QUARTER, 2005 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTIME (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE ANDDIRECTION

_ REPORTED MEASUREMENT) (LLD) MEASUREMENTS CO-60 ZN-65 ZRNB-95 CS-134 CS-137 BALA140 N/A <LLD N/A <LLD N/A <LLD 50 <LLD 60 <LLD N/A <LLD 70 <LLD<LLD<LLD<LLD<LLD<LLD<LLD<LLD<LLD 0 0 0 0 0 0 AIR IODINE (E-3 PCI/CU.METER) 1-131 1-131 54 MILK (PCI/LITER) 4 N/A 0 01 t't I-h 0 w TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 4TH QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2005 NAME OF FACILITY:

LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY:

MARSEILLES, IL REPORTING PERIOD: 4TH QUARTER, 2005 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTIME (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS GAMMA MN-54 CO-58 FE-59 CO-60 ZN-65 ZRNB-95 CS-134 CS-137 4 00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 15 N/A 18 N/A<LLD<LLD<LLD<LLD<LLD<LLD<LLD<LLD 0 0 0 0 0 0 0 (oF1 0 t-1 0 ('

TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 4TH QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2005 NAME OF FACILITY:

LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY:

MARSEILLES, IL REPORTING PERIOD: 4TH QUARTER, 2005 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTIME (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS BA-140 60 N/A<LLD 0 0 0 LA-140 TLD-QUARTERLY 15 84 N/A DIRECT RADIATION (MILLI-ROENTGEN/STD.MO.

N/A 29.5 (82/82)(24/34)<LLD 26.0 (2/2)(25/27)34.0 (1/1)L-102-1 INDICATOR 0.6 MILES NNE OF SITE 0 0 wA TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE LASALLE COUNTY STATION, 2005 NAME OF FACILITY:

LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY:

MARSEILLES, IL REPORTING PERIOD: ANNUAL, 2005 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) -NAME NONROUTIME (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS SURFACE WATER (PCI/LITER)

GR-B H-3 24 8 24 GAMMA MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 4 7.4 (10/12)(4.1/10.4) 200 533 (2/4)(244/821)15 <LLD 15 <LLD 30 <LLD 15 <LLD 30 <LLD Is <LLD 7.7 (10/12)(4.2/10.7) 943 (1/4)7.7 (10/12)(4.2/10.7) 943 (1/4)<LLD<LLD<LLD<LLD<LLD<LLD 0 0 0 L-21 CONTROL ILLINOIS RIVER AT SENECA -UPSTREAM 4.0 MILES NE OF SITE L-21 CONTROL ILLINOIS RIVER AT SENECA -UPSTREAM 4.0 MILES NE OF SITE 0 0 0 0 0 L, 0 cA)MEAN AND RANGE BASED ON DETECTABLE MEASUREMENTS ONLY (M)FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE LASALLE COUNTY STATION, 2005 NAME OF FACILITY:

LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY:

MARSEILLES, IL REPORTING PERIOD: ANNUAL, 2005 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTIME (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS ZR-95 1-131 CS-134 CS-137 BA- 140 LA-140 30 <LLD 15 <LLD 15 <LLD 18 <LLD 60 <LLD 15 <LLD 200 <LLD<LLD<LLD<LLD<LLD<LLD 0 0 0 0 0 GROUND/WELL WATER (PCI/LITER)

H-3 8 8 N/A GAMMA MN-54 15 <LLD N/A 0 I-" 0)gtj 0 MEAN AND RANGE BASED ON DETECTABLE MEASUREMENTS ONLY (M)FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE LASALLE COUNTY STATION, 2005 NAME OF FACILITY:

LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY:

MARSEILLES, IL REPORTING PERIOD: ANNUAL, 2005 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTIME (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 CS-134 CS-137 15 <LLD 30 <LLD 15 <LLD 30 <LLD 15 <LLD 30 <LLD 15 <LLD 18 <LLD N/A N/A N/A N/A N/A N/A N/A N/A 0 0 0 0 0 0 0-- 0 0 1-h t)C0 w MEAN AND RANGE BASED ON DETECTABLE MEASUREMENTS ONLY (M)FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE LASALLE COUNTY STATION, 2005 NAME OF FACILITY:

LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY:

MARSEILLES, IL REPORTING PERIOD: ANNUAL, 2005 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTIME (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS FISH (PCI/KG BA-140 LA-140 GAMMA MN-54 CO-58 FE-59 CO-60 ZN-65 ZRNB-95 12 60 <LLD 15 <LLD 130 <LLD 130 <LLD 260 <LLD 130 <LLD 260 <LLD N/A <LLD N/A N/A 0 0<LLD<LLD<LLD<LLD<LLD<LLD 0 0 0 0 0 0 0 0 (Aj MEAN AND RANGE BASED ON DETECTABLE MEASUREMENTS ONLY (M)FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE LASALLE COUNTY STATION, 2005 NAME OF FACILITY:

LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY:

MARSEILLES, IL REPORTING PERIOD: ANNUAL, 2005 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTIME (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS CS-134 CS-137 BALA-140 GAMMA MN-54 SEDIMENT (PCI/KG DRY)4 130 <LLD 150 <LLD N/A <LLD N/A <LLD N/A <LLD N/A <LLD N/A <LLD N/A <LLD<LLD<LLD<LLD 0 0 ,>I CO-58 FE-59 CO-60 ZN-65 N/A N/A N/A N/A N/A 0 0 0 0 0 U, 0 t'J 0 wA MEAN AND RANGE BASED ON DETECTABLE MEASUREMENTS ONLY (M)FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE LASALLE COUNTY STATION, 2005 NAME OF FACILITY:

LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY:

MARSEILLES, IL REPORTING PERIOD: ANNUAL, 2005 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTIME (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS ZRNB-95 CS-134 CS-137 BALA-140 N/A <LLD 150 <LLD 180 <LLD N/A <LLD 10 23 (312/312)(7/48)N/A <LLD N/A <LLD N/A <LLD N/A N/A N/A N/A 0 0 0 0 AIR PARTICULATE (E-3 PCI/CU.METER)

GR-B 364 28 GAMMA MN-54 CO-58 FE-59 24 (52/52)(10/47)<LLD<LLD<LLD 24 (52/52)(10/47)L-10 CONTROL STREATOR 13.5 MILES SW OF SITE 0 0 0 a%0 0 C)0j MEAN AND RANGE BASED ON DETECTABLE MEASUREMENTS ONLY (M)FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE LASALLE COUNTY STATION, 2005 NAME OF FACILITY:

LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY:

MARSEILLES, IL REPORTING PERIOD: ANNUAL, 2005 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTIME (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS CO-60 ZN-65 ZRNB-95 CS-134 CS-137 BALA 140 28 28 28 28 28 182 18 N/A <LLD N/A <LLD N/A <LLD 50 <LLD 60 <LLD N/A <LLD 70 <LLD I N/A<LLD<LLD<LLD<LLD<LLD<LLD<LLD<LLD 0 0 0 0 0 0 AIR IODINE (E-3 PCI/CU.METER) 1-131 1-131 MILK (PCI/LITER)

.--0 0 to 0 w MEAN AND RANGE BASED ON DETECTABLE MEASUREMENTS ONLY (M)FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE LASALLE COUNTY STATION, 2005 NAME OF FACILITY:

LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY:

MARSEILLES, IL REPORTING PERIOD: ANNUAL, 2005 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTIME (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS GAMMA MN-54 CO-58 FE-59 CO-60 ZN-65 ZRNB-95 CS-134 CS-137 18 00 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 15 N/A 18 N/A<LLD<LLD<LLD<LLD<LLD<LLD<LLD<LLD 0 0 0 0 0 0 0 0 0 Eli C)J 0j MEAN AND RANGE BASED ON DETECTABLE MEASUREMENTS ONLY (M)FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE LASALLE COUNTY STATION, 2005 NAME OF FACILITY:

LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY:

MARSEILLES, IL REPORTING PERIOD: ANNUAL, 2005 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) -NAME NONROUTIME (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS FOOD PRODUCTS (PCI/KG WET)BA-140 LA-140 GAMMA MN-54 CO-58 FE-59 CO-60 ZN-65 ZRNB-95 60 N/A 15 N/A<LLD<LLD 0 0 10 N/A <LLD N/A <LLD N/A <LLD N/A <LLD N/A <LLD N/A <LLD<LLD<LLD<LLD<LLD<LLD<LLD 0 0 0 0 0 0 0 I0 MEAN AND RANGE BASED ON DETECTABLE MEASUREMENTS ONLY (M)FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE LASALLE COUNTY STATION, 2005 NAME OF FACILITY:

LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY:

MARSEILLES, IL REPORTING PERIOD: ANNUAL, 2005 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTIME (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS 1-131 CS-134 CS-137 BALA 140 60 <LLD 60 <LLD 80 <LLD N/A <LLD N/A 26.1 (327/327)(19/34)<LLD<LLD<LLD<LLD 23.6 (8/8)(20/27)0 0 0 0 0>DIRECT RADIATION (MILLI-ROENTGEN/STD.MO.

TLD-QUARTERLY 335 30.0 (4/4)(27/33)L-105-1 INDICATOR 0.7 MILES E OF SITE 0 0 wA MEAN AND RANGE BASED ON DETECTABLE MEASUREMENTS ONLY (M)FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

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

& ANALYTICAL METHODS 65 of 203 Ps, TABLE B-1: Radiological Environmental Monitoring Program -Sampling Locations, Distance and Direction, LaSalle County Station, 2005 Location Location Description Distance & Direction From Site A Siirfane Water L-21 L-40 Illinois River at Seneca, Upstream (control).Illinois River, Downstream (indicator) 4.0 miles NE 5.2 miles NNW R Water L-27 LSCS Onsite Well (indicator)

L-28 Marseilles Well (indicator) 0 miles at station 7.0 miles NW Milk -h-weekly I mnnthly L42 Biros Farm (control)14.2 miles E p Air Partinrl~at I Air Indine L-01 L-03 L-04 L-05 L-06 L-07 L-08 L-10 L-1 1 Nearsite 1 (indicator)

Onsite 3 (indicator)

Rte. 170 (indicator)

Onsite 5 (indicator)

Nearsite 6 (indicator)

Seneca (indicator)

Marseilles (indicator)

Streator (control)Ransom (indicator)

LaSalle Cooling Lake (indicator)

Marseilles Pool of Illinois River, Downstream (indicator)

Illinois River, Upstream of Discharge (control)F Fish L-34 L-35 L-36 1.5 miles NNW 1.0 miles ENE 3.2 miles E 0.3 miles ESE 0.4 miles WSW 5.2 miles NNE 6.0 miles NNW 13.5 miles SW 6.0 miles S 2.0 miles E 6.5 miles NW 4.3 miles NNE 5.2 miles NNW 4.6 miles NNW 4.5 miles NE 3.8 miles ESE 1.5 miles WSW 4.5 miles NW 10.0 miles NW F SRdimmpnt L-40 L-41 Illinois River, Downstream (indicator)

Illinois River, Downstream (indicator)

G Fond Products Quadrant 1 Quadrant 2 Quadrant 3 Quadrant 4 Control Diane Partridge Mike and Gina Welboume Michael Olson Robert Eisers Eugene Clements H Fnvimnmental floqimetry

-TI D Ion~nering L-101-1 and -2 L-102-1 and -2 L-103-1 and -2 L-104-1 and -2 L-105-1 and -2 L-106-1 and -2 L-107-1 and -2 L-108-1 and -2 L-109-1 and -2 L-110-1 and -2 L-111b-1 and -2 0.5 miles N 0.6 miles NNE 0.7 miles NE 0.8 miles ENE 0.7 miles E 1.4 miles ESE 0.8 miles SE 0.5 miles SSE 0.6 miles S 0.6 miles SSW 0.8 miles SW B-I 66 of 203 TABLE B-1: Radiological Environmental Monitoring Program -Sampling Locations, Distance and Direction, LaSalle County Station, 2005 Location Location Description Distance & Direction From Site L-112-1 and -2 L-113a-1 and -2 LI-114-1 and -2 L-1 15-1 and -2 L-116-1 and -2 Outer Ring L-201-3 and -4 L-202-3 and -4 L-203-1 and -2 L-204-1 and -2 L-205-1 and -2 L-205-3 and -4 L-206-1 and -2 L-207-1 and -2 L-208-1 and -2 L-209-1 and -2 L-210-1 and -2 L-211-1 and -2 L-212-1 and -2 L-213-3 and -4 L-214-3 and -4 L-215-3 and -4 L-216-3 and -4 0.9 miles WSW 0.8 miles W 0.9 miles WNW 0.7 miles NW 0.6 miles NNW 4.0 miles N 3.6 miles NNE 4.0 miles NE 3.2 miles ENE 3.2 miles ESE 5.1 miles E 4.3 miles SE 4.5 miles SSE 4.5 miles S 4.0 miles SSW 3.3 miles SW 4.5 miles WSW 4.0 miles WSW 4.9 miles W 5.1 miles WNW 5.0 miles NW 5.0 miles NNW L-01-1 and -2 L-03-1 and -2 L-04-1 and -2 L-05-1 and -2 L-06-1 and -2 L-07-1 and -2 L-08-1 and -2 L-1 1-1 and -2 Nearsite I (indicator)

Onsite 3 (indicator)

Rte. 170 (indicator)

Onsite 5 (indicator)

Nearsite 6 (indicator)

Seneca (indicator)

Marseilles (indicator)

Ransom 1.5 miles NNW 1.0 miles ENE 3.2 miles E 0.3 miles ESE 0.4 miles WSW 5.2 miles NNE 6.0 miles NNW 6.0 miles S C.ntrnil and Rpna lntprpqt L-10-1 and -2 Streator 13.5 miles SW B-2 67 of 203 4J TABLE B-2: Radiological Environmental Monitoring Program -Summary of Sample Collection and Analytical Methods, LaSalle County Station, 2005 Sample Medium Analysis Sampling Method Analytical Procedure Number Surface Water Gamma Spectroscopy Monthly composite TBE, TBE-2007 Gamma emitting radioisotope analysis from weekly grab samples. Env. Inc., GS-01 Determination of gamma emitters by gamma soectroscopy Surface Water Gross Beta Monthly composite TBE, TBE-2008 Gross Alpha and/or gross beta activity in from weekly grab various matrices samples.Env. Inc., W(DS)-01 Determination of gross alpha and/or gross beta in water (dissolved solids or total residue)Surface Water Tritium Quarterly composite TBE, TBE-2011 Tritium analysis in drinking water by liquid from weekly grab scintillation samples.Env. Inc., T-02 Determination of tritium in water (direct method)Ground/Well Water Gamma Spectroscopy Quarterly grab TBE, TBE-2007 Gamma emitting radioisotope analysis samples.Env. Inc., GS-01 Determination of gamma emitters by_amma soectroscoov Ground/Well Water Tritium Quarterly grab TBE, TBE-2011 Tritium analysis in drinking water by liquid samples, scintillation Env. Inc., T-02 Determination of tritium in water (direct method)Fish Gamma Spectroscopy Semi-annual samples TBE-2007 Gamma emitting radioisotope analysis collected via electroshocking or Env. Inc., GS-01 Determination of gamma emitters by other technigues aamma sPectroscoov Sediment Gamma Spectroscopy Semi-annual grab TBE, TBE-2007 Gamma emitting radioisotope analysis samples Env. Inc., GS-01 Determination of gamma emitters by gamma soectroscoov Air Particulates Gross Beta One-week composite of TBE, TBE-2008 Gross Alpha and/or gross beta activity in continuous air various matrices sampling through glass fiber filter paper Env. Inc., AP-02 Determination of gross alpha and/or gross beta in air particulate filters Air Particulates Gamma Spectroscopy Quarterly composite of TBE, TBE-2007 Gamma emitting radioisotope analysis each station Env. Inc., GS-01 Determination of gamma emitters by qamma spectroscoov Air Iodine Gamma Spectroscopy Bi-weekly composite of TBE, TBE-2007 Gamma emitting radioisotope analysis continuous air sampling through Env. Inc., 1-131-02 Determination of 1-131 in charcoal charcoal filter canisters by gamma soectroscopy (batch method)Milk 1-131 Bi-weekly grab sample TBE, TBE-2012 Radioiodine in various matrices when cows are on pasture. Monthly all Env. Inc., 1-131-0% Determination of 1-131 in milk by anion other times exchanqe Milk Gamma Spectroscopy Bi-weekly grab sample TBE, TBE-2007 Gamma emitting radioisotope analysis when cows are on pasture. Monthly all Env. Inc., GS-01 Determination of gamma emitters by other times oamma spectroscopV Food Products Gamma Spectroscopy Annual grab samples. TBE, TBE-2007 Gamma emitting radioisotope analysis Env. Inc., GS-01 Determination of gamma emitters by gamma spectroscopv TLD Thermoluminescence Quarterly TLDs Global Dosimetry Dosimetry comprised of two Global Dosimetry CaF2 elements.B-3 68 of 203 6 ......6. 6 U on.K Tlwtaol Figure B-1 Inner Ring TLD Locations of the LaSalle County Station, 2005 B-4 69 of 203'A' 3 .1544 21340 41=4 a 2354* U54 I sowa I IKimta 8 11__ 1 TLC l MIMi Figure B-2 Outer Ring TLD Locations of the LaSalle County Station, 2005 B-5 70 of 203 6@6L1.rn_ l ?- j Oaazd sR"gu Ivanm wrogmmu lI 1 Ran*=o Iro I no*Le I SU 830 azP~ai La~jen I Omitdjr t~jlan co~zny a LAW S $1*Figure B-3 Fixed Air Sampling Locations of the LaSalle County Station, 2005 B-6 71 of 203 t" 1 Fish U Milk S Sedimem 0 Watr Figure B-4 Ingestion and Waterborne Exposure Pathway Sample Locations of the LaSalle County Station, 2005 B-7 72 of 203 APPENDIX C DATA TABLES AND FIGURES PRIMARY LABORATORY 73 of 203 TABLE C-I.1 CONCENTRATIONS OF GROSS BETA IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2005 RESULTS IN UNITS OF PCI/LITER

+/- 2 SIGMA COLLECTION PERIOD JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC L-21 L-40* 4:0 5.3 1.3 9.3 +/-,1.1.5.6 +/- 1.2< 4.0< 4.0 5.2 +/- 1.3< 4.0 4.7 +/- 1.3 6.6 +/- 1.6 4.2 8.7 8.1 8.7 11 8.7 7.6+/-1+/-+/-+/-++/-+/-0.8 2.3 2.3 2.1 2.2 2.1 2.6 4.1 6.7 8.3 10 10 10 7.8+/- 0.8+/- 2.2+/- 2.3+ 2.3+/- 2.2+/- 2.2+/- 2.6 TABLE C-1.2 CONCENTRATIONS OF TRITIUM IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2005 RESULTS IN UNITS OF PCI/LITER

+/- 2 SIGMA COLLECTION PERIOD JAN-MAR APR-JUN JUL-SEP OCT-DEC L-21 L-40< 200< 200< 187 943 +/- 120< 200 244 +/- 96< 192 821 +/- 116 DUE TO VENDOR CHANGE, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE AND MDC VALUES JULY THROUGH DECEMBER C-1 74 of 203 TABLE C-1.3 CONCENTRATIONS OF GAMMA EMITTERS IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2005 RESULTS IN UNITS OF PCI/LITER

+/- 2 SIGMA STC COLLECTION PERIOD L-21 JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 1-131 CS-134 CS-137 BA-140 LA-140< 15< 15* 15< 15< 15< 15<2<1<1<1<2<1< 15< 15< 15< 15< 15< 15<2<1<1<1<2<1<15< 15< 15< 15< 15< 15<2<1<1<1<2<1< 15< 15< 15< 15< 15< 15<3<1<2<2<2<2< 30< 30<30< 30< 30< 30<5<2<3<3<4<3< 30< 30< 30< 30< 30< 30<7<3<4<4<5<4< 15< 15< 15< 15< 15< 15<1<1<2<1<1<1< 15< 15< 15< 15< 15< 15<2<1<1<1<2<1< 30< 30< 30<30<30< 30<3<1<2<2<4<3< 30< 30< 30< 30< 30< 30<5<2<2<3<4<3< 15< 15< 15< 15< 15< 15<2<1<1<1<2<2< 15< 15< 15< 15< 15< 15<3<1<2<2<2<2< 30< 30< 30< 30< 30< 30<3<1<2<2<3<3< 30< 30< 30< 30< 30< 30<5<2<3<3<4<3< 15< 15< 15< 15< 15< 15< 11<6<9< 10< 13< 14< 15< 15< 15< 15< 15< 15< 14< 10< 11< 13< 15<3< 15< 15< 15< 15< 15< 15<1<1<1<2<1< 15< 15< 15< 15< 15< 15<2<1<1<1<2<1< 18< 18< 18< 18< 18< 18<2<1<1<1<2<1< 18< 18< 18< 18< 18< 18<2<1<1<1<2<1< 60< 60< 60< 60< 60< 60< 32<9< 14< 15< 20< 19< 60< 60_< 60< 60< 60< 60< 47< 16< 17< 19<24< 23< 15< 15< 15< 15< 15< 15< 12<3<5<5<7<7< 15< 15< 15< 15< 15< 15< 14<5<6<6<8<8 0 L40 JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC-, In 0 I-h t0 0 wd DUE TO VENDOR CHANGE, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE AND MDC VALUES JULY THROUGH DECEMBER TABLE C-4.1 CONCENTRATIONS OF TRITIUM IN GROUND/WELL WATER SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2005 RESULTS IN UNITS OF PCI/LITER

+/-2 SIGMA COLLECTION PERIOD, JAN-MAR APR-JUN JUL-SEP OCT-DEC L-27< 200< 200< 166< 186 L-28< 200< 200< 173< 160 DUE TO VENDOR CHANGE,< VALUES ARE LLD VALUES JANUARY THROUGH JUNE AND MDC VALUES JULY THROUGH DECEMBER C-3 76 of 203 TABLE C-11.2 CONCENTRATIONS OF GAMMA EMITTERS IN GROUNDIWELL WATER SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2005 RESULTS IN UNITS OF PCI/LITER

+/- 2 SIGMA STC COLLECTION PERIOD L-27 JAN APR 07/14/05 10113/05 MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 CS-134 CS-1 37 BA-140 LA-140< 15< 15* 15<4<6< 15<15<7<6< 30< 30<11<11< 15* 15<5<7< 30< 30<11<11< 15< 15<6<7< 30< 30< 11< 12* 15* 15<5<5<18<18<5<7< 60< 60< 29<36< 15 15<9<7 L-28 JAN APR 07/14/05 10/13/05< 15< 15<6<5* 15< 15<5<5< 30< 30< 12<11* 15* 15<7<5< 30< 30< 14<9* 15* 15<7<4<30< 30<11<8* 15* 15<5<4< 18 18<5<5< 60< 60< 32< 26 15 15 10 10 C)0 1h'.3 0 (~J DUE TO VENDOR CHANGE, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE AND MDC VALUES JULY THROUGH DECEMBER TABLE C-I11.1 CONCENTRATIONS OF GAMMA EMITTERS IN FISH SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY POWER STATION, 2005 RESULTS IN UNITS OF PCI/KG WET +/- 2 SIGMA COLLECTION PERIOD MN-54 CO-58 FE-59 CO-60 ZN-65 ZRNB-95 CS-134 CS-137 BALA-140 STC L-34 Largemouth Bass Smallmouth Bass Smallmouth Bass Bluegill 05117/05 05/17/05 10126105 10126/05* 130< 130< 26< 60< 130< 130< 25< 75< 260< 260< 71< 142< 130< 130< 32<76< 260< 260<94< 148< 200< 200< 33< 81< 100< 100<24-< 59< 100< 100< 39< 86< 300< 300<84< 120 01 L-35 Channel Catfish Smallmouth Buffalo Carp Channel Catfish L-36 Channel Catfish Freshwater Drum Carp Channel Catfish 05/17/05 05/17/05 10/26/05 10126/05 05/17/05 05/17105 10/26/05, 10/26/05< 130< 130< 55*<34< 130< 130< 62< 38< 130< 130< 59< 40< 130<. 130< 69< 34< 260< 260< 143< 69< 260< 260< 108< 97< 130< 130< 73< 24< 130< 130< 58<24< 260< 260< 113<64< 260< 260< 131< 75< 200< 200< 73< 31< 200< 200< 87< 47* 100< 100< 63< 31< 100< 100< 48< 36< 100< 100< 57< 42< 100< 100< 58< 39< 300< 300< 120< 102< 300< 300< 126< 71-j1 0 0 LA)DUE TO VENDOR CHANGE, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE AND MDC VALUES JULY THROUGH DECEMBER TABLE C-IV.1 CONCENTRATIONS OF GAMMA EMITTERS IN SEDIMENT SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2005 RESULTS IN UNITS OF PCI/KG DRY +/-:2 SIGMA STC COLLECTION PERIOD MN-54 CO-58 FE-59 CO-60 ZN-65 ZRNB-95 CS-1 34 CS-137 BALA-140 L-40 05/19/05 < 150 10/06105 < 53 L-41 05/19105 < 150 10/06/05 < 86< 100<50< 100<84< 600< 116< 600< 180< 100< 59< 100<84< 600* 130< 600< 147< 200< 90< 200< 144< 150 < 180< 43 < 59< 600< 81< 600< 135< 150< 79< 180< 100 C,'-3~0 0 I-ti 0 (A.)DUE TO VENDOR CHANGE, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE AND MDC VALUES JULY THROUGH DECEMBER TABLE C-V.1 CONCENTRATIONS OF GROSS BETA IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2005 RESULTS IN UNITS OF E-3 PCI/CU METER +/- SIGMA GROUP I I GROUP II GROUP III GRUP IV WEEK L-03 L-05 L-01 L-06 L-04 L-07 L-08 L-11 L-10 1 28+/-t 4 29 +/- 3 29 +/- 4 26 +/- 3 (1) (1) (1) (1) 27 4 2 29 +/-4 28+/-*:4 22 +/-4 24 +/-4 29+/-4 3 38+/-4 36 +/-:4 37+/-4 38 +/-14 42 4 4 25.+/- 3 27 +/-3 27 +/- 3 26 +/- 3 32+/-4 5 24 +/-4 22 +/-4 25 +/-4 26 +/-4 27 4 6 26 +/-4 29 +/-4 24 +/-4 24 +/-4 28 4 7 22:+/-13 22 +/-3 25 +/-4 25 +/-4 23 4 8 28 +/-4 26 +/-4 28 +/-4 30 +/-4 29 4 9 30+/-4 25+/-4 23+/-4 31 +/-4 29+/-4 10 29 +/-4 23 +/-4 36 +/-4 23 +/-4 25 +/-4 11 17+/-,3 19+/-3 16+/-3 22+/-3 23+/-3 12 15 +/-3 16 +/-3 17 +/-3 14 +/-3 18 3 13 19+/-3 22+/-3 22+/-3 27+/-3 23+/-3 14 24:+/- 4 27 +/-4 23 +/-4 23 +/-4 24 +/-4 15 20 +/-4 19 +/- 4 22 +/-4 21 +/- 4 19 3 16 23 +/-4 24 +/-4 23 +/-4 38 +/-4 30 +/-4 17 17 +/-3 14 +/-3 18 +/-4 16 +/-3 16 +/- 3 18 23 +/-4 21 +/-4 21 +/-4 22 +/-4 23 +/-4 19 31 +/-4 28 +/-4 32 +/-4 32 +/-4 30 +/-4 20 17 +/- 3 16 +/- 3 16 +/- 3 16 +/-3 20 +/- 3 21 18 +/- 3 14 +/- 3 15 +/-:3 18 +/-4 13 +/- 3 22 16+/-3 17+/-3 21 +/-3 18+/-3 22+/-4 23 25:+/-14 22 +/-4 24 +/-4 20 +/-4 22 +/-4 24 14 +/- 3 16 +/-3 17 +/-4 17 +/-3 15 +/-3 25 18+/-3 18+/-3 16+/-3 16+/-3 20+/-4 26 45 +/-4 43 +/-4 43+/-1:4 38 +/-4 47 +/-4 27 14+/-5 9+/-4 12+/-5 13+/-5 8+/-4 13+/-5 9+/-4 10+/-4 15+/-5 28 19+/- 5 20 +/-5 18 +/-5 24 +/-"5 18 +/- 5 22 +/- 5 21 +/-5 20 +/- 5 21 5 29 21+/-5 17+/-5 21+/-5 18+/-5 17+/-5 22+/-5 17+/-5 26+/-5 21+/-5 30 10+/- 4 17 +/-5 10 +/-4 15 +/-5 12 +/-5 12 +/- 5 10 +/-4 12 +/-t5 13 5 31 20+/- 5 19 +/-5 19 +/- 5 21 +/-5 20 5 23 5 14 +/- 5 22 +/- 5 21 +/-6 32 21+/- 5 24 +/-6 22 +/- 5 21 +/- 7 21 +/-5 27 6 27 +/-6 28 +/- 6 35 +/-6 33 23+/- 5 18 +/-5 23 +/-5 22 +/-:6 22 +/-5 20 5 21 +/- 5 27 +/- 5 21 +/- 5 34 7+/-4 11 +/- 4 11+/-4 9+/-4 11+/-4 7+/-4 9+/-4 10+/-4 11+/-4 35 21+/- 5 22 +/-5 22 +/- 5 27 +/-5 23 +/-5 27 +/-5 25 +/- 5 26 +/- 5 26 +/- 5 36 21+/- 5 25 +/-6 30 +/-6 26 +/-5 23 +/-5 25 +/-6 20 +/- 5 22+/-:t5 27 +/- 6 37 37+/- 5 42 +/-6 41 +/- 5 37 +/- 5 41 6 38 6 45 +/- 6 47 +/-6 43 +/-6 38 16+/-5 20+/-5 16+/-5 20+/-5 18+/-5 21+/-5 19+/-5 21+/-5 20+/-5 39 15-*-4 19 +/-5 18 +/-5 19 +/- 5 14 4 24 5 15 +/-4 19 +/- 5 26 +/- 5 40 19* 5 19+/-5 21 +/-5 23 +/-5 19+/-5 18+/-4 16+/-4 22+/-:t5 24+/-5 41 10+/-4 11+/-4 11+/-4 9+/-4 12+/-4 10+/-4 11+/-4 12+/-4 11+/-4 42 17+/- 5 21 +/- 5 18 +/- 5 18 +/- 4 26 +/- 5 20 +/- 5 21 +/- 5 24:t 5 21 +/- 5 43 10+/-4 12+/-4 12+/-4 14+/-4 13+/-4 10+/-4 15+/-4 18+/-4 10+/-4 44 27+/- 5 21 +/-4 19 +/-4 24 +/- 5 24 +/-5 27 +/-5 24 +/-4 21 +/-4 26 +/- 5 45 32+/-5 30+/-5 30+/-5 31+/-5 31+/-5 34+/-5 30+/-5 33+/-6 36+/-6 46 12+/-4 17+/-4 15+/-4 16+/-4 11+/-4 17+/-4 18+/-4 21+/-:t5 18+/-4 47 24+/- 5 22 +/-t5 21 +/- 5 23 +/- 5 23 +/- 5 28 +/-5 21 +/- 5 24 +/- 5 25 +/- 5 48 19+/-4 18+/-4 15+/-4 15+/-4 15+/-4 17+/-4 14+/-4 17+/-4 15+/-4 49 25+/- 5 27 +/-5 27 +/- 5 34 +/-5 27 +/- 5 32 +/- 5 29:+/-:5 31 +/- 5 26+/- 5 50 29+/- 5 27 +/-4 26 +/-4 33 +/-5 27 +/-4 29 +/-5 36 +/- 5 34 +/- 5 31 5 51 37+/- 5 42 +/-6 37 +/-5 42 +/-6 43 +/-6 45 +/-6 46 +/-6 48 +/-6 41 +/- 6 52 35+/- 5 25 +/-5 27 +/- 5 26 +/- 5 27 +/- 5 32 +/-5 35 +/-5 30 +/- 5 28 +/- 5 MEAN 22 +/-16 22 +/- 15 22 +/- 15 23 +/- 15 21 +/-17 23 +/- 18 22 +/- 20 24+/-:t19 24 +/- 16 (1) SEE PROGRAM CHANGES SECTION FOR EXPLANATION C-7 80 of 203 TABLE C-V.2 MONTHLY AND YEARLY MEAN VALUES OF GROSS BETA CONCENTRATIONS (E-3 PCIICU METER) IN AIR AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2005 GROUP I -ONSITE LOCATIONS GROUP II -NEAR SITE LOCATIONS GROUP III -FAR FIELD LOCATIONS GROUP IV -CONTROL LOCATIONS COLLECTION PERIOD 12/30/04 -02/03/05 02103/05 -03/03105 03103/05 -03/31/05 03131/05 -04/28/05 04/28/05 -06/02/05 06/02/05 -06/30/05 06/30/05 -07/28/05 07/28/05 -09101/05 09/01/05 -09/29/05 09/29/05 -11/03/05 11/03/05 -12/01/05 12/01/05 -12/29/05 MIN MAX MEAN +/-22 22 15 14 14 14 9 7 15 10 12 25 38 30 22 24 31 45 21 24 42 27 32 42 2 SD 29

• 10 26 +/- 6 18 1 5 20 1 7 20 1 11 25 +/- 24 16 +/- 9 18 +/- 11 24 +/- 20 17 +/- 12 22 +/- 13 31 1 12 12 02 03 03 04 06 06 07 09 09 11 COLLECTION MIN MAX MEAN +PERIOD 2 SD/30/04 -02/03/05 22 38 28 +/- 11/03/05 -03/03/05 23 31 27 +/- 6/03/05 -03/31/05 14 27 20 +/- 10/31/05 -04/28/05 16 38 23 +/- 16/28/05 -06/02/05 15 32 21 +/- 12/02105 -06/30/05 16 43 24 +/- 21/30/05 -07/28/05 10 24 16 +/- 10 7/28/05 -09/01105 9 27 20 +/- 11/01/05 -09/29/05 16 41 26 +/- 18 1/29/05 -11/03/05 9 24 17 +/- 11/03/05 -12/01/05 15 31 21 +/- 13/01/05 -12/29/05 26 42 31 +/- 12 COLLECTION MIN MAX MEAN +PERIOD 2 SD 12/30/04 -02/03/05 (1) (1) (1)02/03/05 -03/03/05 03/03/05 -03/31/05 03/31/05 -04/28/05 04/28/05 -06/02/05 06/02105 -06/30/05 06/30/05 -07/28/05 8 26 16 +/- 11 07/28/05 -09/01/05 7 28 21 +/- 13 09/01/05 -09/29/05 14 47 26 +/- 21 09129/05 -11/03/05 10 27 18 t 11 11/03/05 -12101/05 11 34 22 +/- 15 12/01/05 -12/29/05 27 48 34 +/- 15 COLLECTION PERIOD 12/30/04 -02/03/05 02/03/05 -03/03/05 03/03/05 -03/31/05 03/31/05 -04/28/05 04/28/05 -06/02/05 06/02/05 -06/30/05 06/30/05 -07/28/05 07/28/05 -09/01/05 09/01/05 -09/29/05 09/29/05 -11/03/05 11/03/05 -12/01/05 12101105 -12/29/05 MIN MAX MEAN +/-2 SD 27 42 31 +/- 13 23 29 27 +/- 7 18 23 21 +/- 6 16 30 22 +/- 15 13 30 22 +/- 12 15 47 26 +/- 29 13 21 17 +/- 9 11 35 23 +/- 18 20 43 29 +/- 19 10 26 18 +/- 15 15 36 24 +/- 19 26 41 32 +/- 13 12/30/04 -12/29/05 7 45 22 +/- 9 12/30/04 -12/29/05 9 43 23 +/- 9 12/30/04 -12/29/05 7 48 23 +/- 13 12/30/04 -12/29/05 10 47 24 +/- 9 C)OD 1-i O (1) SEE PROGRAM CHANGES SECTION FOR EXPLANATION 0 C-'h TABLE C-V.3 CONCENTRATIONS OF GAMMA EMITTERS IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2005 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA STC COLLECTION PERIOD L-01 03/31/05 06/30105 06/30105 09/29/05 MN-54 CO-58 FE-59 CO-60 ZN-65 ZRNB-95-CS-134 CS-137 BALA140< 10< 10* 0.8< 2.9< 10< 10< 2.1< 4.7< 15< 15< 8.8< 5.2< 10< 10< 3.4< 40< 40< 3.4< 6.6< 10_<10< 2.4< 4.7<- 50<50< 1.1< 2.6< 60< 60< 1.5< 2.6< 25< 25< 243< 70 L-03 03/31105 06130105 06130/05 09/29/05< 10< 10< 1.7< 2.4< 10< 10< 3.6< 3.4< 15< 15< 13< 14< 10< 10< 1.6< 2.7< 40< 40< 5.4< 6.9< 10< 10< 4.7< 4.3< 50<50< 1.4< 2.4< 60< 60< 1.8< 2.4< 25< 25< 432< 118 0 (b L-04 06/30/05 09/29105 L-05 03/31/05 06/30/05 06/30/05 09/29/05 (1)(1)<1.1< 2.9< 10< 10< 2.0< 3.2< 2.9< 4.1< 10< 10< 4.7< 3.2< 7.5< 13< 15< 15< 15< 16< 1.2< 2.0< 10< 10< 2.8< 3.4< 3.3< 9.0< 40< 40< 5.2< 7.4< 2.4< 4.5< 10< 10< 5.2< 6.0< 1.3< 2.5< 50<50< 1.8< 3.1< 1.1< 2.6< 60< 60< 2.0< 2.7< 326< 123< 25< 25< 406< 124 DUE TO VENDOR CHANGE, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE AND MDC VALUES JULY THROUGH DECEMBER (1) SEE PROGRAM CHANGES SECTION FOR EXPLANATION 0, to 0 ti 0 wA TABLE C-V.3 CONCENTRATIONS OF GAMMA EMITTERS IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2005 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA STC COLLECTION PERIOD L-06 03/31/05 06/30105 06/30105 09129105 MN-54 CO-58 FE-59 CO-60 ZN-65 ZRNB-95 CS-134 CS-137 BALA140<10< 10* 3.0< 3.1<10< 10< 6.4< 6.2< 15* 15* 13< 16< 10< 10< 4.5< 3.4< 40< 40< 8.5< 9.2< 10< 10< 5.4< 6.4<50< 50< 3.3< 3.5< 60< 60< 2.4< 3.3< 25< 25< 758* 165 0 L-07 12/31/04 04/01/05 06/30/05 09/29/05 L-08 (1)(1)< 2.0< 4.0< 2.8< 4.6<11< 17* 1.5* 2.5< 3.3< 8.1< 2.8< 5.0* 1.4< 2.4* 1.3< 2.9< 393* 168 (1)(1)* 1.7< 2.8 06/30/05 09/29/05< 2.3< 5.1< 12< 18* 15* 15* 16* 13< 1.1< 2.5* 10< 10< 1.3< 2.9< 2.6< 6.7< 40< 40< 5.8< 5.0< 2.8< 4.3< 10< 10< 5.8< 5.2* 1.3< 2.1< 50< 50< 1.9< 2.4< 1.2< 1.9< 60< 60< 2.3<2.1* 190< 77< 25< 25< 509* 116 L-10 03/31/05 06/30/05 06/30/05 09/29/05< 10* 10< 1.7< 2.6<10<10< 4.3< 4.1 DUE TO VENDOR CHANGE, <VALUES ARE LLD VALUES JANUARY THROUGH JUNE AND MDC VALUES JULY THROUGH DECEMBER (1) SEE PROGRAM CHANGES SECTION FOR EXPLANATION 00 0-ti 0"a TABLE C-V.3 CONCENTRATIONS OF GAMMA EMITTERS IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2005 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA STC COLLECTION PERIOD L-1 1 03/31/05 06/30/05 06/30/05 09/29/05 MN-54 CO-58 FE-59 CO-60 ZN-65 ZRNB-95 CS-1 34 CS-137 BALA140 (1)(1)< 1.7< 2.2< 2.9< 4.2< 14< 15< 2.6< 2.3< 5.6< 5.7< 2.9< 3.6< 1.0< 2.4< 1.2< 1.8< 385< 119 0 DUE TO VENDOR CHANGE, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE AND MDC VALUES JULY THROUGH DECEMBER (1) SEE PROGRAM CHANGES SECTION FOR EXPLANATION 0 I-h 0'(A

.TABLE C-VI.1 CONCENTRATIONS OF 1-131 IN AIR IODINE SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2005 RESULTS IN UNITS OF E-3 PCI/CU METER + SIGMA GROUP I I GROUP It I GROUP ii!I fROUPIV.... .I ... .I ... ....I G R... .. ..WEEK L-03 L-U5 L-u1 L-06 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52<7<7<7<7<7<7<7<7<7<7<7<7<7< 22< 26< 20< 25<34< 22< 24< 33< 19< 29< 60< 16< 22<7<7<7<7<7<7<7<7<7<7<7<7<7<22<26< 14< 25<34<22<24< 33<19<29< 60< 17< 22<7<7<7<7<7<.7<7'<7<7<7<7<7< 7< 22< 25< 17< 25< 34< 22< 23< 33< 19< 29< 60< 17< 22<7<7<7<7<7<7<7<7<7<7<7<7<7< 19< 14< 23< 18< 30< 16< 16< 32< 29< 16< 40< 13<15 L-04 (1)< 22< 25< 20< 25< 34< 22< 24< 33< 19< 28< 60< 17< 22 (1)(1)L-07 L-08 L-1 1 (1)L-10<7<7<7<7<7<7<7<7<7<7<7<7<7< 10< 21< 18< 23< 17< 30< 21< 32< 19< 33< 23< 10< 15< 19< 21< 20< 23< 31< 31< 12< 32< 29< 33< 23< 14< 15< 19< 20< 18< 23< 31< 30<21<32< 28< 33< 23< 13< 15 18 21 18 23 31 30 21 32 28 32 23 13 15 DUE TO VENDOR CHANGE, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE AND MDC VALUES JULY THROUGH DECEMBER (1) SEE PROGRAM CHANGES SECTION FOR EXPLANATION C-12 85 of 203 TABLE C-VII.1 CONCENTRATIONS OF 1-131 IN MILK SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2005 RESULTS IN UNITS OF PCI/LITER

+/- 2 SIGMA COLLECTION PERIOD'01/06/05 02/03/05 03/03/05 04/06/05 05/05/05 05/19/05 06/02/05 06/16105 07/01/05 07/29/05 08/10/05 08126/05 09/09/05 09123/05 10/07/05 10/21/05 11/04/05 12101/05 CONTROL DAIRY L-42< 1.0< 1.0< 1.0< 1.0< 1.0< 1.0< 1.0< 1.0< 1.0< 1.0< 0.3< 0.4< 0.8< 0.6< 0.5< 0.2< 0.5< 0.6 DUE TO VENDOR CHANGE, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE AND MDC VALUES JULY THROUGH DECEMBER C-13 86 of 203 TABLE C-VII.2 CONCENTRATIONS OF GAMMA EMITTERS IN MILK SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2005 RESULTS IN UNITS OF PCI/LITER

+/- 2 SIGMA STC COLLECTION PERIOD L-42 01/06/05 02/03105 03/03/05 04/06/05 05/05/05 05/19/05 06/02/05 06/16/05 07/01/05 07/29/05 08/10/05 08/26/05 09/09/05 09/23/05 9 10/07/05 10/21/05 11/04/05 12/01105 MN-54 CO-58 FE-59 CO-60 ZN-65 ZRNB-95 CS-134 CS-1 37 BA-140 LA-140< 10< 10< 10* 10< 10* 10< 10< 10< 10<4<5<4<6<5<4<7<6<4< 10< 10< 10< 10< 10< 10< 10< 10< 10<3<3<6<6<7<5<7<6<4<15< 15< 15<15<15< 15< 15< 15< 15<8<9<13<13* 14*13<12<11<11<10<10< 10<10* 10<10<10< 10< 10<4<4<4<6<7<4<7<8<4* 15* 15* 15* 15< 15<15* 15* 15* 15<8* 10* 12* 13* 15* 13* 15* 15<8< 10< 10< 10* 10* 10<10<10< 10< 10<4<4<5<6<7<5<6<6<4< 15<15<15<15<15<15<15<15< 15<3<4<4<5< 5<4<7<6<4* 18* 18* 18* 18< 18* 18* 18* 18* 18<4<4<5<5<7<5<8<7<4* 60* 60< 60* 60* 60< 60* 60* 60* 60< 20* 19< 33< 33< 38< 25< 31< 33< 23* 15* 15* 15* 15* 15* 15* 15* 15* 15<6<6<2* 10* 10<8<11< 10<6 0,-j 0 C)0 DUE TO VENDOR CHANGE, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE AND MDC VALUES JULY THROUGH DECEMBER TABLE C-VIII.1 CONCENTRATIONS OF GAMMA EMITTERS IN FOOD PRODUCT SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2005 RESULTS IN UNITS OF PCI/KG WET +/- 2 SIGMA STC L-QUAD 1 Cabbage L-QUAD I Onions L-QUAD 2 Onions L-QUAD 2 Swiss Chart L-QUAD 3 Beet Green L-QUAD 3 Beets COLLECTION PERIOD 09/17/05 09117/05 MEAN 09/17/05 09171705 MEAN 09110/05 a 09/10/05 MEAN 09/10/05 09/10/05 MN-54 CO-58 FE-59 CO-60< 18<9 13 +/- 13<15<8 12 +/- 10< 16< 10 13 8<11<9< 18<8 13 +/- 14< 17< 10 13 + 10< 18< 10 14 +/- 11<11<6 0< 38< 14 26 +/- 34< 38< 23 31 +/- 21< 45< 30 37 +/- 22< 26< 26 26 +/- 0< 48<34< 16< 13 15 +/- 5< 15< 11 13 +7< 15<9 12 9< 11<7 9+7< 27< 16 ZN-65<33< 19 26 1 20< 41< 26 33

• 21<38< 27 32 +/- 16< 26< 18 22 +/- 12< 59< 37 ZRNB-95< 19-< 11 15 +/- 12< 20< 11 15 +/- 12< 19< 11 15 + 11< 11< 10 1-131 CS-1 34<-42 < 15 < 19 < 28"<18 30 +34< 40< 21 30 +/- 28<56<36 46 ++/-29<36< 28 32 +/- 12<54< 32<8 11 +/- 10< 17< 10 14 +/- 10< 14<7 -11 +/- 10<9<7<8 13 + 15< 22< 11 16

• 15< 15< 11 13 +/- 7< 10<8< 18 23 +/- 14<38< 11 25 +/- 38< 32< 24 28 +/- 12< 18<9 13 +/- 12< 37< 26 CS-137 BALA140 L-QUAD 4 Cabbage L-QUAD 4 Onions L-QUAD C Broccoli L-QUAD C Potatoes MEAN 09/17/05 09/17/05 10 +/- 3< 21< 15 8+7< 24< 16 10 1 2< 25< 17 8+2< 22< 13 9+/-3< 24< 16 0, 00 0 MEAN 18 +/- 9 20 +/- 11 41 +/- 19 21 +/- 15 48 +/- 30 21 +/- 10 43 +/- 31 17 +/- 12 20 +/- 10 31 +/- 16 TABLE C-IX.1 QUARTERLY TLD RESULTS FOR LASALLE COUNTY STATION, 2005 RESULTS IN UNITS OF MILLI-ROENTGEN/QUARTER

+/-2 STANDARD DEVIATIONS STATION MEAN JAN -MAR APR-JUN JUL-SEP OCT-DEC CODE 12 S. D.L-01-1 26.8 1 11 31 22 22 32 L-01-2 26.8 +/- 7.9 30 22 25 30 L-03-1 26.5 +/- 7.0 30 23 24 29 L-03-2 27.0 +/- 6.3 31 25 24 28 L-04-1 26.0 +/- 7.1 29 24: 22 29 L-04-2 24.0 +/- 7.1 28 21 21 26 L-05-1 26.5 +/- 9.3 30 23 22 31 L-05-2 25.0 +/- 10 29 21 20 30 L-06-1 27.3 +/- 5.5 30 24 26 29 L-06-2 27.0 +/- 5.9 29 24 25 30 L-07-1 25.8 +/- 8.9 29 21 23 30 L-07-2 25.8 +/- 7.2 28 21 25 29 L-08-1 26.3 +/- 6.4 29 23 24 29 L-08-2 26.8 +/- 5.5 28 24 25 30 L-10-1 24.0 +/- 7.1 27 22 20 27 L-10-2 23.3 +/- 6.6 27 21 20 25 L-11-1 23.3 +/- 9.8 28 19 19 27 L-11-2 22.8 +/- 8.7 27 19 19 26 L-101-1 26.3 +/- 8.2 29 21 25 30 L-101-2 27.0 +/- 8.5 30 22 25 31 L-102-1 28.3 +/- 10 31 23 25 34 L-102-2 29.5 +/- 6.0 32 26 28 32 L-103-1 27.5 +/- 7.4 30 26 23 31 L-103-2 27.0 +/- 7.8 29 22 26 31 L-104-1 25.8 +/- 8.7 29 22 22 30 L-104-2 25.5 +/- 9.3 29 21 22 30 L-105-1 30.0 +/- 5.9 32 28 27 33 L-105-2 28.3 +/- 7.0 32 24 27 30 L-106-1 25.8 +/- 7.5 29 23 22 29 L-106-2 25.8 +/- 7.9 29 21 24 29 L-107-1 27.0 +/- 8.5 31 22 25 30 L-107-2 27.3 +/- 5.3 29 25 25 30 L-108-1 24.3 +/- 5.0 27 22 24 29 L-108-2 22.0 +/- 2.8 21 22 21 24 L-109-1 26.5 +/- 5.8 27 23 26 30 L-109-2 27.0

• 4.9 28 25 25 30 L-110-1 26.5 +/- 7.7 25 23 26 32 L-110-2 28.0 +/- 4.9 29 26 26 31 L-111B-1 27.5 +/- 6.2 25 27 26 32 L-111B-2 28.0 +/- 5.9 30 26 25 31 L-112-1 24.8 +/- 7.5 24 21 24 30 L-112-2 27.5 +/- 4.8 29 26 25 30 L-113A-1 28.0 +/- 4.3 28 26 27 31 L-1 13A-2 27.5 +/- 4.8 29 26 25 30 L-114-1 27.5 +/- 8.2 31 23 25 31 L-114-2 27.0 +/- 4.0 26 26 26 30 L-115-1 22.8 +/- 4.1 24 21 21 25 L-115-2 24.5 +/- 6.0 28 22 22 26 L-116-1 22.8 +/- 4.1 24 21 21 25 L-116-2 24.3 +/- 6.0 25 21 23 28 C-16 89 of 203 TABLE C-IX.1 QUARTERLY TLD RESULTS FOR LASALLE COUNTY STATION, 2005 RESULTS IN UNITS OF MILLI-ROENTGEN/QUARTER

+/- 2 STANDARD DEVIATIONS STATION CODE MEAN+/-2S.D.JAN -MAR APR-JUN JUL-SEP OCT-DEC 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-21 1-1 L-211-2 L-212-1 L-212-2 L-213-3 L-213-4 L-214-3 L-214-4 L-215-3 L-215-4 L-216-3 L-216-4 22.0 +/- 4.3 26.3 +/- 4.1 ,24.3 +/- 8.7 24.8 +/- 7.9 24.5 +/- 6.2 25.3 +/- 8.2 ,28.3 +/-8.2 27.3 +/- 8.2 27.0 +/- 8.5 27.8 +/- 6.6 27.8 +/- 5.5 26.0 +/- 5.9 27.0 +/- 4.9 25.8 +/- 6.0 25.0 +/- 5.9 23.8 +/- 4.4 25.8 +/- 6.0 25.8 +/- 8.2 25.5 +/- 7.4 26.0 +/- 6.7 27.5 +/- 5.0 28.0 +/- 5.9 26.3 +/- 5.0 26.5 +/- 6.6 27.5 +/- 5.3 26.5 +/- 7.4 24.8 +/- 6.6 24.5 +/- 7.4 26.0 +/- 5.3 25.0 +/- 2.8 26.0 +/- 7.5 27.8 +/- 5.0 27.0 + 5.7 24.5 +/- 2.6 21 26 28 28 24 28 32 31 30 31 29 27 29 25 28 23 25 25 25 30 27 25 26 24 28 25 24 22 24 24 25 28 25 23 22 24 20 20 23 20 23 22 22 24 25 22 24 23 21 21 23 21 21 22 25 27 23 24 25 25 21 21 25 24 22 25 25 24 20 26 21 23 22 24 27 26 25 26 26 26 26 25 25 25 25 26 26 25 27 28 27 27 26 24 25 26 (1)25 26 27 27 26 25 29 28 28 29 29 31 30 31 30 31 29 29 30 26 26 30 31 30 27 31 32 29 31 31 32 29 29 29 27 31 31 31 25 (1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION C-17 90 of 203 TABLE C-IX.2 MEAN QUARTERLY TLD RESULTS FOR THE INNER RING, OUTER RING, OTHER AND CONTROL LOCATIONS FOR LASALLE COUNTY STATION, 2005 RESULTS IN UNITS OF MILLI-ROENTGEN/QUARTER

+/- 2 STANDARD DEVIATIONS OF THE STATION DATA'STATION CODE INNER RING+/-2S. D.OUTER RING OTHER CONTROL JAN-MAR APR-JUN JUL-SEP OCT-DEC 28.2 + 5.4 23.5 + 4.4 24.5 + 3.8 32.0 + 4.4 26.3 +/- 5.5 22.9 +/- 3.6 25.3 +/- 3.5 29.3 +/- 3.8 29.1 +/- 2.3 22.3 +/- 3.6 22.9 +/- 4.5 29.1 +/- 3.3 27.0 +/- 0.0 21.5 +/- 1.4 20.0 +/- 0.0 26.0 +/- 2.8 TABLE C-IX.3

SUMMARY

OF THE AMBIENT DOSIMETRY PROGRAM FOR LASALLE COUNTY STATION, 2005 RESULTS IN UNITS OF MILLI-ROENTGEN/QUARTER LOCATION SAMPLES ANALYZED PERIOD MINIMUM PERIOD MAXIMUM PERIOD MEAN+/- 2S. D.INNER RING OUTER RING OTHER CONTROL 128 135 64 8 21 20 19 20 34 32 32 27 26.5

• 6.9 26.0 +/- 6.2 25.8 +/- 7.4 23.6 +/- 6.4 INNER RING -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 OUTER RING -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-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-211-2 L-211-2, L-212-1, L-212-2, L-213-3, L-213-4, L-214-3, L-214-4, L-215-3, L-215-4, L-216-3, L-216-4 OTHER STATIONS -L-01-1, L-01-2, L-03-1, L-03-2, L-04-1, L-04-2, L-05-1, L-05-2, L-06-1, L-06-2 L-07-1, L-07-2, L-08-1, L-08-2, L-11-1, L-11-2 CONTROL STATIONS = L-10-1, L-10-2 C-18 91 of 203 TABLE C-X.1

SUMMARY

OF COLLECTION DATES FOR SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2005 SURFACE WATER (TRITIUM LIQUID SCINTILLATION)

COLLECTION PERIOD L-21 L-40 JAN-MAR 01/06/05 -03/31/05 01/06/05 -03/31/05 APR-JUN 04/07/05 -06/30/05 04/07/05 -06/30/05 JUL-SEP 07/07/05 -09/29/05 07/07/05 -09/29/05 OCT-DEC 10/06/05 -12/29/05 10/06/05 -12/29/05 SURFACE WATER IGROSS BETA & GAMMA SPECTROSCOPY)

COLLECTION PERIOD L-21 L-40 JAN 01/06/05 -01/27/05 01/06/05 -01/27/05 FEB 02/03/05 -02/24/05 02/03/05 -02/24/05 MAR 03/03/05 -03/31/05 03/03/05 -03/31/05 APR 04/07/05 -04/28/05 04/07/05 -04/28/05 MAY 05/05/05 -05/26/05 05/05/05 -05/26/05 JUN 06102/05 -06/30/05 06/02/05 -06/30/05 JUL 07/07/05 -07/28/05 07/07/05 -07/28/05 AUG 08/04/05 -08/25105 08/04/05 -08/25/05 SEP 09/01/05 -09/29/05 09/01/05 -09/29/05 OCT 10/06/05 -10/27/05 10/06/05 -10/27/05 NOV 11/03/05 -11/23/05 11/03/05 -11/23/05 DEC 12/01/05 -12/29/05 12/01/05 -12/29/05 GROUND/WELL WATER (TRITIUM & GAMMA SPECTROSCOPY)

COLLECTION PERIOD L-27 L-28 JAN-MAR APR-JUN JUL-SEP OCT-DEC 01/13/05 04/13/05 07/14105 10/13/05 01/13/05 04/13/05 07/14/05 10/13/05 C-19 92 of 203 TABLE C-X.1

SUMMARY

OF COLLECTION DATES FOR SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2005 AIR PARTICULATE (GAMMA SPECTROSCOPY)

COLLECTION PERIOD L-01 L-03 L.04 L-05 L-06 JAN-MAR APR-JUN JUL-SEP OCT-DEC 12/30/04 -03/31/05 12/30104 -03/31/05 12130/04 -03/31/05 12/30/04 -03/31105 12/30/04 -03/31/05 03/31/05 -06130/05 03/31/05 -06/30/05 03/31/05 -06/30/05 03/31/05 -06/30/05 03/31/05 -06/30/05 06/30/05 -09/29/05 06/30/05 -09/29/05 06/30/05 -09/29/05 06/30/05 -09/29/05 06/30/05 -09/29/05 09/29/05 -12/29/05 09/29/05 -12/29/05 09/29/05 -12/29/05 09/29/05 -12/29/05 09/29/05 -12/29/05 AIR PARTICULATE (GAMMA SPECTROSCOPY)

COLLECTION PERIOD L-07 L-08 L-10 L-11 JAN-MAR APR-JUN JUL-SEP OCT-DEC 12/30/04 -03/31/05 12/30/04 -03/31/05 12/30/04 -03/31/05 12/30/04 -03/31/05 03/31/05 -06/30/05 03/31/05 -06/30/05 03/31/05 -06/30/05 03/31/05 -06/30/05 06/30/05 -09/29/05 06/30/05 -09/29/05 06/30/05 -09/29/05 06/30/05 -09/29/05 09/29/05 -12/29/05 09/29/05 -12/29/05 09/29/05 -12/29/05 09/29/05 -12/29/05 C-20 93 of 203 TABLE C-X.1

SUMMARY

OF COLLECTION DATES FOR SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2005 AIR PARTICULATE (GROSS BETA & 1-131)COLLECTION PERIOD L-01 L-03 L-04 L-05 L-06 1 2 3 4 5 6 7 8 9 10 11 12 13 14, 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 12i3U/U3 -U1iU)/Ub 01/06/05'-

01/13/05* 01/13/05 -01/20/05 01/20/05 -01/27/05* 01127/05'-

02/03/05 02/03/05 -02/09/05* 02/09/05 -02/17/05 02/17/05 -02/24/05* 02/24/05 -03/03/05 03/03/05 -03/09/05* 03/09/05 -03/17/05 03/17/05 -03/24/05.* 03/24/05 -03/31/05 03/31/05 -04/06/05* 04/06/05 -04/13/05 04/13/05 -04/21/05* 04/21/05 -04/28/05 04/28/05 -05/05/05* 05/05/05 -.05/12/05 05/12/05 -05/19/05* 05/19/05 -05/26/05 05/26/05 -06/02/05* 06/02/05 -06/09/05 06/09/05 -06/16/05* 06/16/05 -06/23/05 06123/05 -06/30/05* 06/30/05 -07/07/05 07107/05 -07/14/05* 07/14/05 -07/21/05 07/21/05 -07/28/05* 07/28/05 -08/04/05 08/04/05 -08/10/05* 08/10/05 -08/17/05 08/17/05 -08/25/05* 08/25/05 -09/01/05 09/01/05 -09/08/05* 09/08/05 -09/15/05 09/15/05 -09/22/05* 09/22/05 -09/29/05 09/29/05 -10/06/05* 10/06/05 -10/13/05 10/13/05 -10/20/05* 10/20/05 -10/27/05 10/27/05 -11/03/05* 11/03/05 -11/10/05 11/10/05 -11/17/05* 11/17/05 -11/23/05 11/23/05 -12/01/05* 12/01/05 -12/08105 12/08/05 -12/15/05* 12/15/05 -12/22/05 12/22/05 -12/29/05 12./U/Ub -Ul/Ub/Ub 121.UIUb -Ul/UblUb 01/06/05 -01/13/05 , 01/06/05 -01/13/05 01/13/05 -01/20/05 01/13/05 -01/20/05 01/20/05 -01/27/05 01/20/05 -01/27/05 01/27/05 -02/03/05 01/27/05 -02/03/05 02/03/05 -02/09/05 02/03/05 -02/09/05 02/09/05 -02/17/05 02/09/05 -02/17/05 02/17/05 -02/24/05 02/17/05 -02/24/05 02/24/05 -03/03/05 02/24/05 -03/03/05 03/03/05 -,03/09/05 03/03/05 -03/09/05 03/09/05 -03/17/05 03/09/05 -03/17/05 03/17/05 -03/24/05 03/17/05 -03/24/05 03/24/05 -03/31/05 03/24/05 -03/31/05 03/31/05 -04/06/05 03/31/05 -04/06/05 04/06/05 -04/13/05 04/06/05 -04/13/05 04/13/05 -04/21/05 04/13/05 -04/21/05 04/21/05 -04/28/05 04/21/05 -04/28/05 04128/05 -05/05/05 04/28/05 -05/05/05 05/05/05 -05/12/05 05/05/05 -05/12/05 05/12/05 -05/19/05 05/12/05 -05/19/05 05/19/05 -05/26/05 05/19105 -05/26/05 05/26/05 -06/02/05 05/26/05 -06/02/05 06/02/05 -06/09/05 06/02/05 -06/09/05 06/09/05 -06/16/05 06109/05 -06/16/05 06/16/05 -06/23/05 06/16/05 -06/23/05 06/23/05 -06/30/05 06/23/05 -06/30/05 06/30/05 -07/07/05 06/30/05 -07/07/05 07/07/05 -07/14/05 07/07/05 -07/14/05 07/14/05 -07/21/05 07/14/05 -07/21/05 07/21/05 -07/28/05 07/21/05 -07/28/05 07/28/05 -08/04/05 07/28/05 -08/04/05 08/04/05 -08/10/05 08/04/05 -08/10/05 08/10/05 -08/17/05' 08/10/05 -08/17/05 08/17/05 -08/25/05 08/17/05 -08/25/05 08/25/05 -09/01/05 08/25/05 -09/01/05 09/01/05 -09/08/05 09/01/05 -09/08/05 09/08/05 -09/15/05 09/08/05 -09/15/05 09/15/05 -09/22/05 09/15/05 -09/22/05 09/22/05 -09/29/05 09/22/05 -09/29/05 09/29/05 -10/06/05 09/29/05 -10/06/05 10/06/05 -10/13105 10/06/05 -10/13/05 10/13/05 -10/20/05 10/13/05 -10/20/05 10/20105 -10/27/05 10/20/05 -10/27/05 10/27/05 -11/03/05 10/27/05 -11/03/05 11/03/05 -11/10/05 11/03/05 -11/10/05 11/10/05 -11/17/05 11/10/05 -11/17/05 11/17/05 -11/23/05 11/17/05 -11/23/05 11123/05 -12/01105 11/23/05 -12/01/05 12/01/05 -12/08/05 12/01/05 -, 12/08/05 12/08/05 -12/15/05 12/08/05 -12/15/05 12/15/05 -12/22/05 12/15/05 -12/22/05 12/22/05 -12/29/05 12/22/05 -12/29/05 1ZIi;U/Ub

-UI/Ub/Ub 01/06/05 -01/13/05 01/13/05 -01/20/05 01/20/05 -01/27/05 01/27105 -02/03105 02/03/05 -02/09/05 02/09105 -02/17/05 02/17/05 -02/24/05 02/24/05 -03/03/05 03/03/05 -03/09/05 03/09/05 -03/17105 03/17/05 -03/24/05 03/24/05 -03/31/05 03/31/05 -04/06/05 04/06/05 -04/13/05 04/13/05 -04/21/05 04/21/05 -04/28/05 04/28/05 -05/05105 05/05/05 -05/12/05 05/12/05 -05/19/05 05/19/05 -05/26/05 05/26/05 -06/02/05 06/02/05 -06/09/05 06/09/05 -06/16/05 06/16/05 -06/23/05 06/23/05 -06/30/05 06/30/05 -07/07/05 07/07/05 -07/14/05 07/14/05 -07/21/05 07/21/05 -07/28/05 07/28/05 -08/04/05 08/04/05 -08/10/05 08/10/05 .- 08/17/05 08/17/05 -08/25/05 08/25/05 -09/01/05 09/01/05 -09/08/05 09/08/05 -09/15/05 09/15/05 -09/22/05 09/22/05 -09/29/05 09/29/05 -10/06/05 10/06/05 -10/13/05 10/13/05 -10/20/05 10/20/05 -10/27/05 10/27/05 -11103/05 11/03/05 -11/10/05 11/10/05 -11/17/05 11/17/05 -11/23/05 11/23/05 -12/01/05 12/01/05 -12/08/05 12/08/05 -12/15/05 12/15/05 -. 12/22/05 12/22/05 -12/29/05-U1/Ut/Ub 01/06/05 -01/13/05 01/13/05 -01/20/05 01/20/05 -01/27/05 01/27/05 -02103/05 02/03/05 -02/09/05 02/09/05 -02/17/05 02/17/05 -02/24/05 02/24/05 -03/03/05 03/03/05 -03/09/05 03/09/05 -03/17/05 03/17/05 -03/24/05 03/24/05 -03/31/05 03/31/05 -04/06/05 04/06/05 -04/13/05 04/13/05 -04/21/05 04/21/05 -04/28/05 04/28/05 -05/05/05 05/05/05 -05/12/05 05/12/05 -05/19/05 05/19/05 -05/26/05 05/26/05 -06/02/05 06/02/05 -06/09/05 06/09/05 -06/16/05 06/16/05 -06/23/05 06/23/05 -06130/05 06/30/05 -07/07/05 07/07/05 -07/14/05 07/14/05 -07/21/05 07/21/05 -07/28/05 07/28/O5 -08/04/05 08/04/05 -08/10/05 08/10/05 -08/17/05 08/17/05 -08/25/05 08/25/05 -09/01/05 09/01/05 -09/08/05 09/08/05 -09/15/05 09/15/05 -09/22/05 09/22/05 -09/29/05 09/29/05 -10/06/05 10/06/05 -10/13/05 10/13/05 -10/20/05 10/20/05 -10/27/05 10/27/05 -11/03/05 11/03/05 -11/10/05 11/10/05 -11/17/05 11/17/05 -11/23/05 11/23/05 -12/01/05 12/01/05 -12/08/05 12/08/05 -12/15/05 12/15/05 -12/22/05 12/22/05 -12/29/05* AIR IODINE SAMPLES COLLECTED BIWEEKLY C-21 94 of 203 TABLE C-X.1

SUMMARY

OF COLLECTION DATES FOR SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2005 AIR PARTICULATE (GROSS BETA & 1-1311 COLLECTION PERIOD L-07 L-08 L-10 L-11 I 121JUIUb -UllUb/Ub 12/30/U. -Ul/Ub/Ub 2 .01/06/05 -01/13/05 01/06/05 -.01/13/05 3 01/13/05 -01/20/05 01/13/05 -01/20/05 4

• 01/20/05 -01/27/05 01/20/05 -01/27/05 5 01/27/05 -02/03/05 01127105 -02/03/05 6

• 02/03/05 -02/09/05 02/03/05 -02/09/05 7 02/09105 -02/17/05 02/09/05 -02/17/05 8

• 02/17/05 -02/24/05 02/17/05 -02/24/05 9 02/24/05 -03/03/05 02/24/05 -03/03/05 10

• 03/03/05 -03/09/05 03/03/05 -03/09/05 11 03109105 -03/17/05 03/09/05 -03/17/05'- "07--- 05 -70372"750-317/05" W/2-04705-13 03/24/05 -03/31/05 03/24/05 -03/31/05 14

• 03/31/05 -04/06/05 03/31/05 -04/06/05 15 04/06/05 -04/13/05 04/06/05 -04/13/05 16

• 04113/05 -04/21/05 04/13/05 -04/21/05 17 04/21/05 -04/28/05 04/21/05 -04/28/05 18 .04/28/05 -05/05/05 04/28/05 -05/05/05 19 05/05/05 -05/12/05 05/05/05 -05/12/05 20

• 05/12/05 -05/19/05 05/12/05 -05/19/05 21 05/19/05 -05/26/05 05/19/05 -05/26/05 22

• 05/26/05 -06/02/05 05/26/05 -06/02/05 23 06/02/05 -06/09/05 06/02/05 -06/09/05 24

• 06/09/05 -06/16/05 06/09/05 -06/16/05 25 06/16/05 -06/23/05 06/16/05 -06/23/05 26

• 06/23/05 -06/30/05 06/23/05 -06/30/05 27 06/30105 -07/07/05 06/30/05 -07/07/05 28

• 07/07/05 -07/14/05 07/07/05 -07/14/05 29 07/14/05 -07/21/05 07/14/05 -07/21/05 30

• 07/21/05 -07/28/05 07/21/05 -07/28/05 31 07/28/05 -08/04/05 07/28/05 -08/04/05 32

• 08/04/05 -08/10/05 08/04/05 -08/10/05 33 08/10/05 -08/17/05 08/10/05 -08/17/05 34

• 08/17/05 -08125/05 08/17/05 -08/25/05 35 08/25/05 -09/01/05 08/25/05 -09/01/05 36

• 09/01/05 -09/08/05 09/01/05 -09/08105 37 09/08/05 -09/15/05 09/08/05 -09/15/05 38

• 09/15/05 -09/22/05 09/15/05 -09/22/05 39 09/22/05 -09/29/05 09/22/05 -09/29/05 40

• 09/29105 -10/06/05 09/29/05 -10/06/05 41 10/06/05 -10/13/05 10/06/05 -10/13/05 42

• 10113105 -10/20/05 10/13/05 -10/20/05 43 10/20/05 -10/27/05 10/20/05 -10/27/05 44

• 10/27/05 -11/03/05 10/27/05 -11/03/05 45 11/03/05 -11/10/05 11/03/05 -11/10/05 46-

• 11/10/05 -11/17/05 11/10/05 -11/17/05 47 11/17/05 -11/23/05 11/17/05 -11/23/05 48

• 11/23/05.-

12/01/05 11/23105 -12/01/05 49 12/01/05 -12/08/05 12/01/05 -12/08/05 50

• 12/08/05 -12/15/05 12/08/05 -12/15/05 51 12/15/05 -12/22/05 12/15/05 -12/22/05 52

• 12/22/05 -12/29/05 12/22/05 -12/29/05 12/3U/Ub -Ul/UOb/Ub 01/06/05 -01/13/05 01/13/05 -01/20/05 01/20/05 -01/27/05 01/27/05 -02/03/05 02/03105 -02/09/05 02/09/05 -02/17/05 02/17/05 -02/24/05 02/24/05 -03/03/05 03/03/05 -03/09/05 03/09/05 -03/17/05-/317/05-03124705 03/24/05 -03/31/05 03/31/05 -04/06/05 04/06/05 -04/13/05 04/13/05 -04/21/05 04/21/05 -04/28/05 04/28/05 -05/05/05 05/05/05 -05/12/05 05/12/05 -05/19/05 05/19/05 -05/26/05 05/26/05 -06/02/05 06/02/05 -06/09/05 06/09/05 -06/16/05 06/16/05 -06/23/05 06/23/05 -06/30/05 06/30/05 -07/07/05 07/07/05 -07/14/05 07/14/05 -07/21/05 07)21/05 -07/28/05 07/28/05 -08/04/05 08/04/05 -08/10/05 08/10/05 -. 08/17/05 08/17/05 -08/25/05 08/25/05 -09/01/05 09/01/05 -09/08/05 09/08/05 -09/15/05 09/15/05 -09/22/05 09/22/05 -09/29/05 09/29/05 -10/06/05 10/06/05 -10/13/05 10/13/05 -10/20/05 10/20/05 -10/27/05 10/27/05 -11/03/05 11/03/05 -11/10/05 11/10/05 -11/17/05 11/17/05 -11/23/05 11/23/05 -12/01/05 12/01/05 -12/08/05 12/08/05 -12/15/05 12/15/05 -12/22/05 12/22/05 -12/29/05 12/30/UU -UI/UbIU5 01/06/05 -01/13/05 01/13/05 -01/20/05 01/20/05 -01/27/05 01/27/05 -02/03/05 02/03/05 -02/09/05 02/09/05 -02/17/05 02/17/05 -02/24/05 02/24/05 -03/03/05 03/03/05 -03/09/05 03/09/05 -03/17/05 03/17/05 -03/24/05 03/24/05 -03/31/05 03/31/05 -04/06/05 04106/05 -04/13/05 04/13/05 -04/21/05 04/21/05 -04/28/05 04/28/05 -05/05/05 05/05/05 -05/12/05 05/12/05 -05/19/05 05/19/05 -05/26/05 05/26/05 -06/02/05 06/02/05 -06/09/05 06/09/05 -06/16/05 06/16/05 -06/23/05 06/23/05 -06/30/05 06/30/05 -07/07/05 07/07/05 -07/14/05 07/14/05 -07/21/05 07/21/05 -07/28/05 07/28/05 -08/04/05 08/04/05 -08/10/05 08/10/05 -08/17/05 08/17/05 -08/25/05 08/25/05 -09/01/05 09/01/05 -09/08/05 09/08/05 -09/15/05 09/15/05 -09/22/05 09/22/05 -09/29/05 09/29/05 -10/06/05 10/06/05 -10/13/05 10/13/05 -10/20/05 10/20/05 -10/27/05 10/27/05 -11/03/05 11/03/05 -11/10/05 11/10/05 -11/17/05 11/17/05 -11/23/05 11/23/05 -12/01/05 12/01/05 -12/08/05 12/08/05 -12/15/05 12/15/05 -12/22/05 12/22/05 -12/29/05* AIR IODINE SAMPLES COLLECTED BIWEEKLY C-22 95 of 203 FIGURE C-I Surface Water -Gross Beta -Station L-21 and L-40 Collected in the Vicinity of LCS, 2000 -2004 L-21 Illinois River at Seneca 10.0.-4.0 010" 01,.01-.00 12-31-00 12-31-01 12-3t-02 12-31-03 12-30-04 L-40 Illinois River Downstream 10,40 0.0 4 1.0 2,40 0OL L 12-31-00 12-31-01 12-31.02 12-31-03 12-0-04 96 of 203 FIGURE C-1 (cont.)Surface Water -Gross Beta -Station L-21 and L-40 Collected in the Vicinity of LCS, 2005 L-21 Illinois River at Seneca 12.0-10.0-8.0+a.6.0-4.0-2.0-0.0 I I I I I 12-01-04 02-01-05 04-01-05 06-01-05 08-01-05 10-01-05 12-01-05 L-40 Illinois River Downstream 12.0-10.0.8.0-a.6.0+4.0,+2.10-0.0 12-01-04 02-01-05 04-01-05 06-01-05 08-01-05 10-01-05 12-01-05 DUE TO VENDOR CHANGE, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE AND MDC VALUES JULY THROUGH DECEMBER 97 of 203 FIGURE C-2 Surface Water -Tritium -Station L-21 (C) and L-40 Collected in the Vicinity of LCS, 2000 -2004 L-21 (C) Illinois River at Seneca 1 400, 1300, 1200 1100 o0w.200-too-01-0-00 12-31-00 12-41-01 12-31-02 $2-31-03 12-304)4 L-40 Illinois River Downstream U 0.1600-1400 1200-1000.500-600.400.-200Ol~i I 01-01-0W 12-31-CO 12-31-01 124-3"2 12-3t-03 12340-04 98 of 203 FIGURE C-2 (cont.)Surface Water -Tritium -Station L-21 (C) and L-40 Collected in the Vicinity of LCS, 2005 L-21 Illinois River at Seneca 1000, 800+600 4-I U C.400+200 -0 03-31-05 06-30-05 09-30-05 12-31-05 L-40 Illinois River Downstream 1000 -800 +600+C.400+2004.0 03-31-05 06-30-05 09-30-05 12-31-05 DUE TO VENDOR CHANGE, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE AND MDC VALUES JULY THROUGH DECEMBER 99 of 203 4, FIGURE C-3 Air Particulates

-Gross Beta -Stations L-01 and L-03 Collected in the Vicinity of LCS, 2000 -2004 L-01 Nearsite No. I ,10.0-6,0-2)60 ,0 .01-41-00 12-31-00 12-31-01 12-31-02 12,-3-03 12-3-04 L-03 Onsite No. 3 0.06 -.010 1 014)1-.0 12-31-00 12-3.14)1 12-31.,02 121-0311 12-30..04 100 of 203 FIGURE C-3 (cont.)Air Particulates

-Gross Beta -Stations L-01 and L-03 Collected in the Vicinity of LCS, 2005 L-01 Nearsite No. 1 50.0 "r ul)C?0.0 I 12-30lJ I l l l l l-04 02-28-05 04-30-05 06-30-05 08-30-05 10-30-05 12-30-05 L-03 Onsite No. 3 50.0*40.0-C., 0.1 C*w 30,0 +20.0 +1 0.0t I V v 0.0 0 043-I I 0 12-30-04 02-28-05 04-30-05 06-30-05 08-30-05 10-30-05 12-30-05 DUE TO VENDOR CHANGE, THE REPORTED UNITS CHANGED FROM E-02 PCI/M3 TO E-03 PCI/M3 101 of 203 FIGURE C-4 Air Particulates

-Gross Beta -Stations L-05 and L-06 Collected in the Vicinity of LCS, 2000 -2004 L-05 Onsite No. 5*10-0 t0 6.0 I.1241-M 1241-1 124142 12-31-0 12-3004 L-06 Nearsite No. 6 10.0 5~0 6.0 I, 0.0~014140 12-3140 12.3141 124142 124t-Q3 12630" 102 of 203 FIGURE C-4 (cont.)Air Particulates

-Gross Beta -Stations L-05 and L-06 Collected in the Vicinity of LCS, 2005 L-05 Onsite No. 5 50.0 40.0 E 30.0 CL W920.0-10.0 0.0 I I I I I I 12-30-04 02-28-05 04-30-05 06-30-05 08-30-05 10-30-05 12-30-05 L-06 Nearsite No. 6 50.0-40.0 30.0 9 20.0--10.0 12-30-04 02-28-05 04-30-05 06-30-05 08-30-05 10-30-05 12-30-05 DUE TO VENDOR CHANGE, THE REPORTED UNITS CHANGED FROM E-02 PCI/M3 TO E-03 PCI/M3 103 of 203?I FIGURE C-5 Air Particulates

-Gross Beta -Station L-10 (C)Collected in the Vicinity of LCS, 2000 -2004 L-10 (C) Streator ,10.01 8.04 4.0 2.0 0.0 1 ......01414.0 12414-0 1241-01 12.31-02 12"31-0 12.404 104 of 203 FIGURE C-5 (cont.)Air Particulates

-Gross Beta -Station L-10 (C)Collected in the Vicinity of LCS, 2005 L-10 (C) Streator 50.0 T 40.0," E-30.0 0.U9 20.0'10.0.0.04I I I I I I 12-30-04 02-28-05 04-30-05 06-30-05 08-30-05 10-30-05 12-30-05 DUE TO VENDOR CHANGE, THE REPORTED UNITS CHANGED FROM E-02 PCI/M3 TO E-03 PCIIM3 105 of 203 4.

FIGURE C-6 Air Particulates

-Gross Beta -Stations L-04 and L-07 Collected in the Vicinity of LCS, 2005 L-04 Rte. 170 50.0 T 40.0+m E i30.0-9juP 20.'0.10.0-/ " 0.0 I 12-31-04 02-28-05 04-30-05 06-30-05 08-31-05 10-31-05 12-31-05 L-07 Seneca 50.0 T 40.0+A 9 0 we 30.0+20.0+10.0 -I 0.0I I I I I I 12-31-04 02-28-05 04-30-05 06-30-05 08-31-05 10-31-05 12-31-05 DUE TO VENDOR CHANGE, THE REPORTED UNITS CHANGED FROM E-02 PCI/M3 TO E-03 PCI/M3 AIR PARTICULATE GROSS BETA ANALYSES OF FAR FIELD LOCATIONS STARTED IN JULY 2005 106 of 203 FIGURE C-7 Air Particulates

-Gross Beta -Stations L-08 and L-1 I Collected in the Vicinity of LCS, 2005 L-08 Marseilles 50.0-40.0-E 30.0 9 20.0 CD 10.0 0.0 I I I I 12-31-04 02-28-05 04-30-05 06-30-05 08-31-05 10-31-05 12-31-05 L-11 Ransom 60.0 50.0 40.0" 30.0 9 C_ 20.0 10.0-0.0 I 12-31-04 02-28-05 04-30-05 06-30-05 08-31-05 10-31-05 12-31-05 DUE TO VENDOR CHANGE, THE REPORTED UNITS CHANGED FROM E-02 PCI/M3 TO E-03 PCI/M3 AIR PARTICULATE GROSS BETA ANALYSES OF FAR FIELD LOCATIONS STARTED IN JULY 2005 107 of 203 APPENDIX D INTER-LABORATORY COMPARISON PROGRAM 108 of 203 TABLE D-1 ANALYTICS ENVIRONMENTAL RADIOACTIVITY CROSS CHECK PROGRAM TELEDYNE BROWN ENGINEERING, 2005 (PAGE 1 OF 3)Identification Month/Year Number Matrix Nuclide Reported Known Ratio (c)Units Value (a) Value (b) TBE/Analytics Evaluation (d)March 2005 E4522-396 Milk E4523-396 Milk E4525-396 AP Sr-89 Sr-90 1-131 Ce-141 Cr-51 Cs-134 Cs-137 Co-58 Mn-54 Fe-59 Zn-65 Co-60 Ce-141 Cr-51 Cs-134 Cs- 137 Co-58 Mn-54 Fe-59 Zn-65 Co-60 pCi/L 96.9 107 pCi/L 16.9 17.9 pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi pCi pCi pCi pCi pCi pCi pCi pCi 82.7 217.314 123 125 110 158 118 191 140 150 278 105 95.6 84.4 112 92.8 162 102 92.3 229 334 139 130 115 160 111 198 144 172 250 104 97.1 86.3 120 83.2 148 108 E4524-396 Charcoal 1-131 pCi 67.4 60.7 pCi/L 89.4 88.1 pCi/L 11.6 11.4 0.91 0.94 0.90 0.95 0.94 0.89 0.96 0.96 0.99 1.06 0.96 0.97 0.87 1.11 1.01 0.98 0.98 0.93 1.12 1.09 0.94 1.11 1.01 1.02 0.95 0.99 0.92 0.85 0.95 0.99 0.96 1.01 0.94 1.23 1.25 1.05 1.03 1.09 1.09 1.11 1.03 0.96 June 2005 E4630-396 Milk E4631-396 Milk E4633-396 AP Sr-89 Sr-90 1-131 Ce-141 Cr-51 Cs- 134 Cs-137 Mn-54 Fe-59 Zn-65 Co-60 Ce-141 Cr-51 Cs-134 Cs- 137 Mn-54 Fe-59 Zn-65 Co-60 pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi pCi pCi pCi pCi pCi pCi pCi 82.3 91.6 278 81.1 180 124 61.1 156 136 79.2 263 69.7 135 94.9 48 120 104 86.9 92.4 303 95.0 189 125 63.9 155 145 64.2 210 66.1 131 87.0 44.4 108 101 A A A A A A A A A A A W W A A A A A A A E4632-396 Charcoal 1-131 pCi 88.9 92.5 D-1 109 of 203 TABLE D-1 ANALYTICS ENVIRONMENTAL RADIOACTIVITY CROSS CHECK PROGRAM TELEDYNE BROWN ENGINEERING, 2005 (PAGE 2 OF 3)Identification Reported Known Ratio (c)Month/Year Number Matrix Nuclide Units Value (a) Value (b) TBE/Analytics Evaluation (d)September 2005 E4766-396 Milk E4767-396 Milk E4769-396 AP Sr-89 Sr-90 1-131 Ce-141 Cr-51 Cs-134 Cs- 137 Co-58 Mn-54 Fe-59 Zn-65 Co-60 Ce-141 Cr-51 Cs-134 Cs-137 Co-58 Mn-54 Fe-59 Zn-65 Co-60 pCi/L 135.0 146.0 pCi/L .9.7 11.5 pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCV/L pCi/L pCi pCi pCi pCi pCi pCi pCi pCi pCi 87.5 203 279 102 178 55.3 81.8 59.9 120 146 193 267 78.4 166 53.7 81.6 59.6 107 133 94.3 233 338 122.0 195 63.4 92.0 61.0 123 167 169 246 88.8 142 46.0 66.8 44.3 89.6 122 E4768-396 Charcoal 1-131 pCi 63.9 64.2 pCi/L 114 128 pCi/L 11.6 10.3 0.92 0.84 0.93 0.87 0.83 0.84 0.91 0.87 0.89 0.98 0.98 0.87 1.14 1.09 0.88 1.17 1.17 1.22 1.35 1.19 1.09 1.00 0.89 1.13 1.07 0.90 0.96 0.86 0.94 0.95 1.00 1.18 1.05 0.92 1.10 1.13 0.87 1.14 1.12 1.25 1.27 1.25 1.10 A A A A A A A A A A A A A A A A A W N (1)A A A December 2005 E4766-396 Milk E4767-396 Milk E4633-396 AP Sr-89 Sr-90 1-131 Ce-141 Cr-51 Cs-134 Cs-137 Co-58 Mn-54 Fe-59 Zn-65 Co-60 Ce-141 Cr-51 Cs-134 Cs-137 Co-58 Mn-54 Fe-59 Zn-65 Co-60 pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi pCi pCi pCi pCi pCi pCi pCi pCi 79.6 202 185 74.9 177 73.9 152 97.5 161 102 221 195 68.4 194 77.4 171 94.2 173 109 74.6 224 193 87.3 189 77.5 152 82.4 154 111 201 173 78.3 170 69.4 137 73.9 138 99.1 A A A A A A A A A A A A A A A A A W W W A D-2 110 of 203/,

TABLE D-1 ANALYTICS ENVIRONMENTAL RADIOACTIVITY CROSS CHECK PROGRAM TELEDYNE BROWN ENGINEERING, 2005 (PAGE 3 OF 3)Identification Reported Known Ratio (c)Month/Year Number Matrix Nuclide Units Value (a) Value (b) TBE/Analytics Evaluation (d)December 2Q05 E4632-396 Charcoal 1-131 pci 73.3 73.3 1.00 A (1) New technician

-AP not counted in petri dish resulted in high Fe-59 activity.

Counting in petri dish, the Fe-59 would have been acceptable as evidenced by the 4Q05 AP recount data. NCR 06-01 (a) Teledyne Brown Engineering reported result.(b) The Analytics known value is equal to 100% of the parameter present in the standard as determined by gravimetric and/or volumetric measurements made during standard preparation.(c) Ratio of Teledyne Brown Engineering to Analytics results.(d) Analytics evaluation based on TBE internal QC limits: A= Acceptable.

Reported result falls within ratio limits of 0.80-1.20.

W-Acceptable with warning. Reported result falls within 0.70-0.80 or 1.20-1.30.

N = Not Acceptable.

Reported result falls outside the ratio limits of < 0. 70 and > 1.30.D-3 Ill of 203 TABLE D-2 ERA ENVIRONMENTAL RADIOACTIVITY CROSS CHECK PROGRAM TELEDYNE BROWN ENGINEERING, 2005 (PAGE 1 OF 1)Identification Reported Known Month/Year Number Media Nuclide Units Value (a) Value (b) Control Limits Evaluation (c)May 2005 Rad 61 Water Sr-89 Sr-90 Ba-133 Cs-134 Cs-137 Co-60 Zn-65 Gr-A Gr-B H-3 pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L 37.5 5.37 88.6 70.5 201 37.5 122 35.5 35.6 24600 41.3 5.92 88.4 78.6 201 37.0 118 37.0 34.2 24400 32.6-50.0 A 0.00-14.6 A 73.1-104 A 69.9 -87.3 A 184-218 A 28.3-45.7 A 97.6-138 A 21.0-53.0 A 25.5 -42.9 A 20200 -28600 A Rad 61 November 2005 Rad 63 Water 1-131 Water Sr-89 Sr-90 Ba-133 Cs-134 Cs- 137 Co-60 Zn-65 Gr-A Gr-B H-3 pCi/L 13.6 15.5 10.3-20.7 pCi/L pCVL pCi/L pCi/L pCi/L pCi/L pCi/L pCVL pCi/L pCi/L 18.0 16.6 31.7 30.8 26.8 83.9 109 19.5 34.0 12400 19.0 16.0 31.2 33.9 28.3 84.1 105 23.3 39.1 12200 10.3 -27.7 7.37 -24.7 22.5 -39.9 25.2 -42.6 19.6 -37.0 75.4 -92.8 86.8-123 13.2 -33.4 30.4 -47.8 10100- 14300 A A A A A A A A A A A Rad 63 Water 1-131 pCi/L 17.8 17.4 12.2 -22.6 A (a) Teledyne Brown Engineering reported result.(b) The ERA known value is equal to 100% of the parameter present in the standard as determined by gravimetric and/or volumetric measurements made during standard preparation.(c) ERA evaluation:

A=acceptable.

Reported result falls within the Warning Limits. NA=not acceptable.

Reported result falls outside of the Control Limits. CE=check for Error. Reported result falls within the Control Limits and outside of the Warning Limit.D-4 112 of 203?I TABLE D-3 DOE'S MIXED ANALYTE PERFORMANCE EVALUATION PROGRAM (MAPEP)TELEDYNE BROWN ENGINEERING, 2005 (PAGE I OF 2)Identification Reported Known Acceptance Month/Year Number Media Nuclide Units Value (a) Value (b) Range Evaluation (c)April2005 05-MaW1'3 Water Cs-134 Cs-137 Co-57 Co-60 H-3 Mn-54 Sr-90 Zn-65 Cs-134 Cs-137 Co-57 Co-60 Mn-54 K-40 Zn-65 Bq/L Bq/L Bq/L Bq/L Bq/L Bq/L Bq/L Bq/L Bq/L Bq/L Bq/L Bq/L Bq/L Bq/L Bq/L 108 305 215 241 283.314 0.093 509 127 332 227 251 280 331 88.90- 165.10 232.40- 461.60 158.90- 295.10 175.70- 326.30 196.00- 364.00 231.70-430.30 no range given (1)496 347.20 -644.80 MaS13 Soil 655 310 234 219 512 642 890 759 315 242 212 485 604 810 531.30-986.70 220.50 -409.50 169.40- 314.60 148.40 -275.60 339.50 -630.50 422.80 -785.20 567.00 -1053 A A A A A A A A A A A A A A A A A A A A A A A A A A GrW13 Water Gr-A Gr-B RdF13 AP Cs-134 Cs-137 Co-57 Co-60 Mn-54 Sr-90 Zn-65 GrF13 AP Gr-A Gr-B Bq/L 0.601 0.525 >0.0 -1.05 Bq/L 1.54 1.67 0.84-2.51 Bq/sample Sq/sample Bq/sample Bq/sample Bq/sample Bq/sample Bq/sample 3.26 2.05 4.78 3.02 3.31 1.15 3.14 3.51 2.26 4.92 3.03 3.33 1.35 3.14 2.46-4.56 1.58 -2.94 3.44-6.40 2.12-3.94 2.33-4.33 0.95- 1.76 2.20 -4.08 Sq/sample 0.0764 0.232 >0.0 -0.46 Bq/sample 0.305 0.297 0.15- 0.45 April 2005 RdV13 Vegetation Cs-1 34 Cs-137 Co-57 Co-60 Mn-54 Sr-90 Zn-65 Bq/kg Bq/kg Bqlkg Bq/kg Bq/kg Bq/kg Bq/kg 5.45 4.80 13.4 3.67 6.45 1.49 7.71 142 302 251 243 547 383 8.75 324 5 4.1 9.88 3.15 5.18 1.65 6.29 167 333 272 261 527 418 8.98 330 3,50 -6.50 2.88-5.34 6.92- 12.84 2.21 -4.10 3.63 -6.73 1.16-2.15 4.40-8.18 A A A A A A A October 2005 05-MaW14 Water Cs-134 Cs- 137 Co-57 Co-60 H-3 Mn-54 Sr-90 Zn-65 Bq/L Bq/L Bq/L Bq/L Bq/L BqlL Bq/L Bq/L 116.90- 217.10 233.10- 432.90 190.40- 353.60 182.70- 339.30 368.90 -685.10 292.60 -543.40 6.29-11.67 231.00 -429.00 A A A A A A A A D-5 113 of 203 TABLE D-3 DOE'S MIXED ANALYTE PERFORMANCE EVALUATION PROGRAM (MAPEP)TELEDYNE BROWN ENGINEERING, 2005 (PAGE 2 OF 2)Identification Reported Known Acceptance Month/Year Number Media Nuclide Units Value (a) Value (b) Range Evaluation (c)October 2005 MaS14 Soil Cs-134 Cs-I 37 Co-57 Co-60 Mn-54 K-40 Zn-65 Bq/L Bq/L Bq/L Bq/L Bq/L Bq/L Bq/L 494 446 506 289 460 626 889 568 439 524 287 439 604 823 397.60 -738.40 307.30 -570.70 366.80 -681.20 200.90 -373.10 307.30 -570.70 422.80 -785.20, 576.10- 1070 GrW14 RdF14 October 2005 Water Gr-A Gr-B AP Cs-1 34 Cs-137 Co-57 Co-60 Mn-54 Sr-90 Zn-65 AP Gr-A Gr-B Bq/L 0.858 0.79 Bq/L 1.22 1.35 Bq/sample Bq/sample Bq/sample Bq/sample Bq/sample Bq/sample Bq/sample 4.11 3.16 6.14 2.86 4.54 2.12 4.28 3.85 3.23 6.2 2.85 4.37 2.25 4.33 0.21 -1.38 0.85- 1.92 2.70 -5.01 2.26 -4.20 4.34-8.06 2.00 -3.71 3.06 -5.68 1.58-2.93 3.03 -5.63 A A A A A A A A A A A A A A A A A A A A W A A A A GrF14 Bq/sample 0.304 0.482 >0.0 -0.80 Bq/sample 0.858 0.827 0.55- 1.22 RdV13 Vegetation Cs-134 Cs- 137 Co-57 Co-60 Mn-54 Sr-90 Zn-65 Bq/kg Bq/kg Bq/kg Bq/kg Bq/kg Bq/kg Bq/kg 4.35 5.99 17.0 4.87 7.40 2.03 11.8 4.09 5.4 13.30 4.43 6.57 2.42 10.2 2.86 -5.32 3.80 -7.06 9.31 -17.29 3.10-5.76 4.60-8.54 1.69-3.15 7.14- 13.26* MAPEP reported the result as acceptable although the reported value of 13.4 is higher than the acceptance range upper limit of 12.84. The acceptance range was expanded to +- 40% bias due to confusion regarding preparation process. MAPEP did not corrected the acceptance range on the report.(1) The Sr-90 in water was a MAPEP false positive test. The TBE reported result of 0.093 +/- 0.0908 Bq/L was the forced Sr-9O activity and uncertainty, as required by MAPEP. The MDC for the sample was 0. 145 pCi/L.(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) DOEIMAPEP evaluation:

A=acceptable, W=acceptable with waming, N=not acceptable.

D-6 114 of 203?I TABLE D-4 ERA(a) STATISTICAL

SUMMARY

PROFICIENCY TESTING PROGRAM ENVIRONMENTAL, INC., 2005 (Page 1 of 2)Concentration (pCi/L)Lab Code Date Analysis Laboratory ERA Control ResultD Result' Limits Acceptance STW-1051 STW-1051 STW-1052 STW-1052 STW-1052 STW-1052 STW-1052 STW-1'053 STW-1053 STW-1054 STW-1054 STW-1054 STW-1055 STW-1055 STW-1056 STW-1056 STW-1056 STW-1056 STW-1056 STW-1057 STW-1057 STW-1058 STW-1059 STW-1059 STW-1059 STW-1060 STW-1067 STW-1067 STW-1068 STW-1068 STW-1068 STW-1068 STW-1068 STW-1069 STW-1069 STW-1070 STW-1070 STW-1070 02/15/05 02/15/05 02/15/05 02/15/05 02/15/05 02/15/05 02/15/05 02/15/05 02/15/05 02/15105 02/15/05 02/15/05 05/17/05 05/17/05 05/17/05 05/17/05 05/17/05 05/17/05 05/17/05 05/17/05 05/17/05 05/17/05 05/17/05 05/17/05 05/17/05 05/17/05 08/16/05 08/16/05 08/16/05 08/16/05 08/16/05 08/16/05 08/16/05 08/16/05 08/16/05 08/16/05 08/16/05 08/16/05 Sr-89 Sr-90 Ba-133 Co-60 Cs-134 Cs-1i37 Zn-65 Gr. Alpha Gr. Beta Ra-226 Ra-228 Uranium Sr-89 Sr-90 Ba-133 Co-60 Cs-134 Cs- 137 Zn-65 Gr. Alpha Gr. Beta 1-131 Ra-226 Ra-228 Uranium H-3 Sr-89 Sr-90 Ba-133 Co-60 Cs-134 Cs-137 Zn-65 Gr. Alpha Gr. Beta Ra-226 Ra-228 Uranium 28.0 +/- 1.2 25.1 +/- 0.7 52.9 +/- 2.8 54.4 +/- 0.4 67.7 +/- 1.8 39.6 +/- 1.8 159.7 +/- 3.0 55.1 +/- 1.8 46.8 +/- 1.3 13.7 +/- 1.5 13.3 +/-0.6 5.1 +/-0.2 29.4 24.4 53.4 56.6 64.9 40.2 161.0 67.9 51.1 14.1 13.7 5.0 20.7 -38.1 15.7 -33.1 44.2 -62.6 47.9 -65.3 56.2 -73.6 31.5 -48.9 133.0 -189.0 38.5 -97.3 38.5 -97.3 10.4 -17.8 7.8 -19.6 0.0 -10.2 45.1 +/- 4.1 7.5 +/- 0.9 87.1 +/- 2.0 38.4 +/- 0.8 75.3 +/- 0.7 201.0 +/- 8.4 130.0 +/- 6.7 42.7 +/- 2.9 34.0 +/- 0.4 14.7 +/- 0.5 6.6 +/-0.1 19.3 +/- 0.7 9.6 +/-0.1 24100.0 +/- 109.0 29.1 +/- 3.0 36.0 +/- 0.6 107.0 +/- 1.7 15.2 +/- 0.2 89.1 +/- 0.3 72.1 +/- 1.0.67.4 +/- 1.4 44.3 +/- 1.5 58.4 +/-2.1 16.6 +/- 1.5 6.2 +/-0.3 4.5 +/-0.1 41.3 5.9 88.4 37.0 78.6 194.0 118.0 37.0 34.2 15.5 7.6 18.9 10.1 24400.0 28.0 33.8 106.0 13.5 92.1 72.7 65.7 55.7 61.3 16.6 6.2 4.5 32.6 -50.0 0.0 -14.6 73.1 -104.0 28.3 -45.7 69.9 -87.3 184.0 -218.0 97.6 -138.0 21.0 -53.0 25.5 -42.9 10.3 -20.7 5.6 -9.5 10.7 -27.1 4.9 -15.3 20200.0 -28600.0 19.3 -36.7 25.1 -42.5 87.7 -124.0 4.8 -22.2 83.4 -101.0 64.0-81.4 54.3 -77.1 31.6 -79.8 44.0 -78.6 12.3 -20.9 3.5-8.9 0.0-9.7 Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass D-7 115 of 203 TABLE D-4 ERA(a) STATISTICAL

SUMMARY

PROFICIENCY TESTING PROGRAM ENVIRONMENTAL, INC., 2005 (Page 1 of 2)Concentration (pCi/L)Lab Code Date Analysis Laboratory ERA Control Result' Result' Limits Acceptance STW-1072 STW-1072 STW-1073 STW-1073 STW-1073 STW-1073 STW-1073 STW-1074 d STW-1074 STW-1075 STW-1076 STW-1076 e STW-1 076 STW-1077 11/15/05 11/15/05 11/15/05 11/15/05 11/15/05 11/15/05 11115/05 11115/05 11/15/05 11/15/05 11/15/05 11115/05 11/15/05 11/15/05 Sr-89 Sr-90 Ba-133 Co-60 Cs-134 Cs-137 Zn-65 Gr. Alpha Gr. Beta 1-131 Ra-226 Ra-228 Uranium H-3 20.6 +/- 0.4 15.0 +/- 0.3 31.8 +/- 1.8 85.0 +/- 1.4 37.2 +/- 2.1 27.8 +/- 0.7 109.0 +/- 1.0 41.1 +/- 1.2 42.7 +/- 0.5 20.5 +/- 0.6 7.8 +/- 0.6 5.5 +/- 0.6 15.5 +/- 0.3 12500.0 +/- 238.0 19.0 16.0 31.2 84.1 33.9 28.3 105.0 23.3 39.1 17.4 8.3 3.5 16.1 12200.0 10.3 -27.7 7.3 -24.7 22.5 -39.9 75.4 -92.8 25.2 -42.6 19.6 -37.0 86.8- 123.0 13.2 -33.4 30.4 -47.8 12.2 -22.6 6.2 -10.5 2.0 -5.0 10.9 -21.3 10100.0 -14300.0 Pass Pass Pass Pass Pass Pass Pass Fail Pass Pass Pass Fail Pass Pass o Results obtained by Environmental, Inc., Midwest Laboratory as a participant in the crosscheck program for proficiency testing in drinking water conducted by Environmental Resources Associates (ERA).b Unless otherwise indicated, the laboratory result is given as the mean +/- standard deviation for three determinations.

c Results are presented as the known values, expected laboratory precision (1 sigma, 1 determination) and control limits as provided by ERA.d The original samples were calculated using an Am-241 efficiency.

The samples were spiked with Th-232. Samples were recounted and calculated using the Th-232 efficiency.

Results of the recount: 27.01 : 2.35 pCi/L.Decay of short-lived radium daughters contributed to a higher counting rate. Delay of counting for 100 minutes provided better results.The reported result was the average of the first cycle of 100 minutes, the average of the second cycle counts was 4.01 pCi/L D-8 116 of 203/

TABLE D-5 DOE'S MIXED ANALYTE PERFORMANCE EVALUATION PROGRAM (MAPEPf ENVIRONMENTAL, INC., 2005 (Page 1 of 3)Concentration b Known Control Lab Code' Date Analysis Laboratory result Activity Limits a Acceptance STW-1045 01/01/05 Gr. Alpha STW-1045 01/01/05 Gr. Beta STW-1 046 STW-1046 STW-1046 STW-1046 STW-1046 STW-1046 STW-1046 STW-1046 STW-1046 STW-1046 STW-1 046 STW-1046 STW-1046 STW-1 046 STW-1046 STW-1046 STVE-1047 STVE-1047 STVE-1047 STVE-1047 STVE-1047 STVE-1047 STSO-1048 STSO-1048 STSO-1048 STSO-1048 STSO-1048 STSO-1048 STSO-1048 STSO-1048 STSO-1048 STSO-1048 STSO-1048 STSO-1048 STSO-1048 STSO-1048 STAP-1050 STAP-1050 01/01/05 01/01105 01/01/05'01/01/05 01/01/05 01/01/05, 01/01/05 01/01/05 01/01/05 01/01/05 01/01/05 01/01/05 01/01/05 01/01/05 01/01/05 01/01/05 01/01/05 01/01/05 01/01/05 01/01/05 01/01/05 01/01/05 Am-241 Co-57 Co-60 Cs-1 34 Cs-137 Fe-55 H-3 Mn-54 Ni-63 Pu-238 Pu-239/40 Sr-90 Tc-99 U-233/4 U-238 Zn-65 Co-57 Co-60 Cs-134 Cs-137 Mn-54 Zn-65 0.45 + 0.10 1.90 +/- 0.10 1.62 +/- 0.12 239.40 +/- 1.20 248.70 +/- 1.00 115.50 +/- 1.80 328.50 +/- 1.70 64.90 +/- 7.00 304.00 +/- 9.70 334.80 +/- 1.90 7.10 +/- 1.60 0.01 +/- 0.02 2.50 +/- 0.14 0.70 +/- 0.80 43.20 +/- 1.40 3.31 +/- 0.20 3.38 +/- 0.20 538.40 +/- 3.80 10.60 +/- 0.20 3.00 +/- 0.20 4.80 +/- 0.40 4.10 +/- 0.30 5.10 +/- 0.30 6.20 +/- 0.50 96.60 +/- 10.00 264.00 +/- 2.00 226.50 +/- 2.20 760.60 +/- 3.70 336.20 +/- 3.60 663.70 +/- 18.00 541.30 +/- 3.90 924.30 +/- 17.20 0.60 +/- 0.80 78.00 +/- 4.80 514.60 +/- 18.70 47.90 +/- 4.00 226.30 +/- 8.60 851.30 +/- 7.30 0.53 1.67 0.00 -1.05 0.84 -2.51 1.72 227.00 251.00 127.00 332.00 75.90 280.00 331.00 9.00 0.02 2.40 0.00 42.90 3.24 3.33 496.00 9.88 3.15 5.00 4.11 5.18 6.29 109.00 242.00 212.00 759.00 315.00 604.00 485.00 1220.00 0.48 89.50 640.00 62.50 249.00 810.00 1.20 -2.24 158.90 -295.10 175.70 -326.30 88.90 -165.10 232.40 -431.60 53.13 -98.67 196.00 -364.00 231.70 -430.30 0.00 -20.00 0.00 -1.00 1.68-3.12 0.00 -5.00 30.03 -55.77 2.27 -4.21 2.33 -4.33 347.20 -644.80 6.92 -12.84 2.21 -4.10 3.50 -6.50 2.88 -5.34 3.63 -6.73 4.40 -8.18 76.30 -141.70 169.40 -314.60 148.40 -275.60 531.30 -986.70 220.50 -409.50 422.80 -785.20 339.50 -630.50 854.00 -1586.00 0.00- 1.00 62.65 -116.35 448.00 -832.00 43.75 -81.25 174.30 -323.70 567.00 -1053.00 Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass 01/01/05 Am-241 01/01/05 Co-57 01/01/05 Co-60 01/01/05 Cs-134 01/01/05 Cs-137 01/01/05 K-40 01/01/05 Mn-54 01/01/05 Ni-63 01/01/05 Pu-238 01/01/05 Pu-239/40 01/01/05 Sr-90 01/01/05 U-233/4 01/01/05 U-238 01/01/05 Zn-65 01/01/05 Gr. Alpha 01/01/05 Gr. Beta 0.11 +/- 0.03 0.38 +/- 0.05 0.23 0.30 0.00 -0.46 0.15 -0.45 D-9 117 of 203 TABLE D-5 DOE'S MIXED ANALYTE PERFORMANCE EVALUATION PROGRAM (MAPEPT ENVIRONMENTAL, INC., 2005 (Page 2 of 3)Concentration b Known Control Lab Code' Date Analysis Laboratory result Activity Limits 0 Acceptance STAP-1049 STAP-1049 STAP-1049 STAP-1049 STAP-1049 STAP-1049 STAP-1049 STAP-1049 STAP-1049 STAP-1049 STAP-1049 STAP-1049 01/01/05 01/01/05'01/01/05 01/01/05 01101105 01/01/05 01/01/05 01/01/05 01/01/05 01/01/05 01/01/05 01/01/05 Am-241 Co-57 Co-60 Cs-1 34 Cs-I137 Mn-54 Pu-238 Pu-239/40 Sr-90 U-233/4 U-238 Zn-65 0.10 +/- 0.04 4.76 +/- 0.64 2.84 +/- 0.22 3.54 +/- 0.37 2.20 +/- 0.27 3.15 +/- 0.21 0.16 +/- 0.04 0.17 +/- 0.02 2.24 t 0.34 0.34 +/- 0.02 0.35 +/- 0.02 3.12 +/- 0.15 0.10 4.92 3.03 3.51 2.26 3.33 0.20 0.17 1.35 0.34 0.35 3.14 0.07 -0.13 3.44 -6.40 2.12 -3.94 2.46 -4.56 1.58 -2.94 2.33 -4.33 0.14 -0.25 0.14 -0.25 0.95 -1.76 0.24 -0A4 0.25 -0.46 2.20 -4.08 STW-1061 STW-1061 STW-1061 STW-1061 STW-1061 STW-1061 STW-1061 STW-1061 STW-1061 STW-1061 STW-1061 STW-1061 STW-1061 STW-1061 STW-1061 STW-1061 07/01/05 07/01/05 07/01/05 07/01/05 07/01/05 07/01/05 07/01/05 07/01/05 07/01/05 07/01/05 07/01/05 07/01/05 07/01/05 07/01/05 07/01/05 07/01/05 Am-241 Co-57 Co-60 Cs-1 34 Cs-137 Fe-55 H-3 Mn-54 Ni-63 Pu-238 Pu-239/40 Sr-90 Tc-99 U-233/4 U-238 Zn-65 STW-1062 07/01/05 Gr. Alpha STW-1062 07/01/05 Gr. Beta 2.21 +/- 0.13 293.20 +/- 7.30 275.70 +/- 1.30 171.80 +/- 4.00 342.10 +/- 2.20 167.80 +/- 9.30 514.20 +/- 12.60 437.00 +/- 2.50 105.10 +/- 3.60 1.64 +/- 0.12 2.32 +/- 0.13 9.20 +/- 1.30 72.30 +/- 2.30 4.11 +/- 0.18 4.14 +/- 0.18 364.60 +/- 4.90 0.57 +/- 0.05 1.36 +/- 0.05 48.40 +/- 3.90 608.30 +/- 2.80 322.70 +/- 2.40 632.10 +/- 5.20 512.40 +/- 4.20 720.50 +/- 19.00 516.80 +/- 5.10 366.50 +/- 13.30 68.80 +/- 15.00 0.00 +/- 0.00 602.90 +/- 17.20 61.50 +/- 1.00 164.50 +/- 16.70 874.70 +/- 8.40 2.23 272.00 261.00 167.00 333.00 196.00 527.00 418.00 100.00 1.91 2.75 8.98 66.50 4.10 4.26 330.00 0.79 1.35 81.10 524.00 287.00 568.00 439.00 604.00 439.00 445.00 60..80 0.00 757.00 52.50 168.00 823.00 1.56 -2.90 190.40 -353.60 182.70 -339.30 116.90 -217.10 233.10 -432.90 137.20 -254.80 368.90 -685.10 292.60 -543.40 70.00 -130.00 1.34-2.48 1.93 -3.58 6.29 -11.67 46.55 -86.45 2.87-5.33 2.98-5.54 231.00 -429.00 0.21 -1.38 0.85-1.92 56.77 -105.43 366.80 -681.20 200.90 -373.10 397.60 -738.40 307.30 -570.70 422.80 -785.20 307.30 -570.70 311.50 -578.50 42.56 -79.04 0.00 -0.00 529.90 -984.10 36.75 -68.25 117.60 -218.40 576.10 -1070.00 Pass Pass Pass Pass Pass Pass Pass Pass Fail Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Fail Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass STSO-1 063 f STSO-1063 STSO-1063 STSO-1063 STSO-1063 STSO-1063 STSO-1063 STSO-1063 STSO-1063 STSO-1063 STSO-1063 STSO-1063 STSO-1063 STSO-1063 07/01/05 07/01/05 07/01/05 07/01/05 07/01/05 07/01/05 07/01/05 07/01/05 07/01/05 07/01/05 07/01/05 07/01/05 07/01/05 07/01/05 Am-241 Co-57 Co-60 Cs-134 Cs- 137 K-40 Mn-54 Ni-63 Pu-238 Pu-239/40 Sr-90 U-233/4 U-238 Zn-65 D-10 118 of 203 TABLE D-5 DOE'S MIXED ANALYTE PERFORMANCE EVALUATION PROGRAM (MAPEPT ENVIRONMENTAL, INC., 2005 (Page 3 of 3)Concentration b Known Control Lab Code' Date Analysis Laboratory result Activity Limits a Acceptance STVE-1064 STVE-1064 STVE-1064 STVE-1064 STVE-1064 STVE-1064 STVE-1064 STVE-1064 STVE-1064 STVE-1064 STVE-1064 STVE-1064 07/01/05 07/01/05 07/01/05 07/01/05 07/01'/05 07/01/05 07/01/05 07/01/05 07/01/05 07/01/05 07/01/05 07/01/05 Am-241 Co-57 Co-60 Cs-1 34 Cs-1 37 Mn-54 Pu-238 Pu-239/40 Sr-90 U-233/4 U-238 Zn-65 STAP-1065 07/01/05 Gr. Alpha STAP-1065 07/01/05 Gr. Beta 0.18 +/- 0.03 15.90 +/- 0.20 4.80 +/- 0.10 4.60 +/- 0.20 5.90 +/- 0.30 7.20 +/- 0.20 0.04 +/- 0.02 0.13 +/- 0.02 2.80 +/- 0.30 0.28 +/- 0.03 0.33 +/- 0.04 11.00 +/- 0.50 0.30 +/- 0.04 0.97 +/- 0.06 0.14 +/- 0.03 5.81 +/- 0.17 2.79 +/- 0.14 3.67 +/- 0.12 2.93 +/- 0.23 4.11 +/- 0.26 0.11 +/- 0.02 0.10 +/- 0.01 2.25 +/- 0.29 0.28 +/- 0.02 0.28 +/- 0.02 4.11 +/- 0.26 0.23 13.30 4.43 4.09 5.43 6.57 0.00 0.16 2.42 0.33 0.35 10.20 0.48 0.83 0.16 -0.30 9.31 -17.29 3.10 -5.76 2.86 -5.32 3.80 -7.06 4.60 -8.54 0.00 -1.00 0.11 -0.21 1.69 -3.15 0.23 -0.43 0.24 -0.45 7.14 -13.26 0.00 -0.80 0.55 -1.22 0.11 -0.21 4.34 -8.06 2.00 -3.71 2.70 -5.01 2.26 -4.20 3.06 -5.68 0.07 -0.13 0.06 -0.12 1.58 -2.93 0.19 -0.35 0.20 -0.37 3.06 -5.68 Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass STAP-1066 STAP-1066 STAP-1066 STAP-1066 STAP-1066 STAP-1 066 STAP-1066 STAP-1066 STAP-1066 STAP-1066 STAP-1066 STAP-1066 07/01/05 07/01/05 07/01/05 07/01/05 07/01/05 07/01/05 07/01/05 07/01/05 07/01/05 07/01/05 07/01/05 07/01/05 Am-241 Co-57 Co-60 Cs-1 34 Cs-1 37 Mn-54 Pu-238 Pu-239/40 Sr-90 U-233/4 U-238 Zn-65 0.16 6.20 2.85 3.85 3.23 4.37 0.10 0.09 2.25 0.27 0.28 4.33 Results obtained by Environmental, Inc., Midwest Laboratory as a participant in the Department of Energy's Mixed Analyte Performance Evaluation Program, Idaho Operations office, Idaho Falls, Idaho b Results are reported in units of Bq/kg (soil), Bq/L (water) or Bq/total sample (filters, vegetation) as requested by the Department of Energy.c Laboratory codes as follows: STW (water), STAP (air filter), STSO (soil), STVE (vegetation).

d MAPEP results are presented as the known values and expected laboratory precision (1 sigma, 1 determination) and control limits as defined by the MAPEP.S The strontium carbonate precipitates were redissolved and processed.

The average of the three analyses was 1.34 pCi/L, although the recovery was only 30%. The result of a new analysis was 1.56 pCi/L.f Incorrect sample weight used in calculation.

Result of recalculation:

97.0 +/- 7.8 Bq/kg.D-11 119 of 203 APPENDIX E EFFLUENT DATA 120 of 203"I TABLE OF CONTENTS IN T R O D U C T IO N ....................................................................................................................

1 S U M M A R Y .............................................................................................................................

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

3 3.1.1.1. Gamma Dose Rates ...............................................

3 3.1.1.2. Beta Air and Skin Dose Rate ................................

4 3.1.2. Radioactive Iodine .................................................................

4 3.1.2.1. Dose to Thyroid .......................................................

5 3.2. Liquid Effluent Pathways .....................................................................

5 3.3. Assessment of Dose to Member of Public ..........................................

5 4.0. SITE METEOROLOGY

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

6 i 121 of 203 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 Liquid Effluents Summation of all 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-1.9 Table 3.3.1 10CFR20 Compliance Assessment

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

E-1.13 Table 3.4-1 Maximum Doses Resulting from Airborne Releases Based On Concurrent Meteorological Data .............................................

E-1.17 ii 122 of 203 INTRODUCTION LaSalle County Station, a two-unit BWR station, is located near Marseilles, Illinois in LaSalle county, 3.5 miles south the Illinois River. Both units are rated for 3489 MWt. Unit 1 loaded fuel in March 1982. Unit 2 loaded fuel in late December '1983. The station has been designed to keep releases to the environment at levels below those specified in the regulations.

Liquid effluents from LaSalle County Station are released to the Illinois River in controlled

'batches after radioassay of each batch. Gaseous effluents are released to the atmosphere after delay to permit decay of short-lived (noble),gases. Releases to the atmosphere are calculated on the basis of analyses of routine grab samples of noble gases as well as continuously collected composite samples of iodine and particulate radioactivity sampled during the course of the year. 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, 1-131, 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 1-131 in milk are the critical pathways at this site; however, an environmental monitoring program is conducted which also includes these and many other pathways which are less significant in terms of radiation protection.

123 of 203

SUMMARY

Gaseous and liquid effluents for the period contributed to only a small fraction of the LaSalle County Station Technical

'Specification limits. 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 releases to the atmosphere represented the critical pathway for the period with a maximum individual total dose estimated to be 1.14E-01 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." Yearly data comparisons are provided in Sections 5.1 and 5.2;- five-year graphical trend data is provided in Appendix III, Section 7.0. The results of analysis confirm that the station is operating in compliance with 10CFR50 Appendix I, 10CFR20 and 40CFR190.2 124 of 203 4 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 8.18E+03 curies of fission and activation gases were released with a maximum quarterly average release rate of 3.62E+02 pCi/sec.A total of 8.89E-02 curies of 1-131 were released during the year with a maximum quarterly release rate of 4.95E-03 pCi/sec.A total of 2.42E-02 curies of beta-gamma emitters was released as airborne particulate matter with a maximum quarterly average release rate of 1.36E-03 pCi/sec. Alpha-emitting radionuclides were below the lower limit of detection (LLD).A total of 6.17E+01 curies of tritium was released with a maximum quarterly average release rate of 2.58E+00 pCi/sec.1.2 Liquids Released to Illinois River There were no liquid batch releases in 2005. Continuous release path activity was below applicable Lower Limits of Detection.

2.0 SOLID RADIOACTIVE WASTE Solid radioactive wastes were shipped by truck to the Envirocare Disposal Facility or to a waste processor.

For further detail, refer the LaSalle 2005 Radioactive Effluent Release Report. The submittal date of this report was April 29, 2005.3.0 DOSE TO MAN 3.1 Gaseous Fffluient Pathways Table 3.1-1 summarizes the doses resulting from releases of airborne radioactivity via the different exposure pathways.3.1.1 3.1.1.1 Gamma Dose Rates Unit I and Unit 2 gaseous releases at LaSalle 3 125 of 203 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 bases on concurrent meteorological data are shown in Table 3.4-1. Bases on measured effluents and meteorological data, the maximum total body dose to an individual would be 1.14E-01 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 7.87E-02 mrem. (Table 3.4-1).The maximum gamma air dose was 1.51E-01 mrad (Table 3.1-1) and 2.76E-01 mrad based'on concurrent meteorological data (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 1.20E-01 (Table 3.1-1)and 9.34E-02 mrem (Table 3.4-1) based on concurrent meteorological data. The maximum offsite beta dose for the year was 5.45E-03 mrad (Table 3.1-1) and 2.55E-02 mrad (Table 3.4-1)based on concurrent meteorological data.3.1.2 Radioactive Iodine The human thyroid exhibits a significant capacity to 4 126 of 203 concentrate ingested or inhaled iodine. The radioidine, 1-131, 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 in 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 1-131 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 1-131 was 1.08E-01 mrem (child) for the year (Table 3.1-1).3.2 1 igild Fffluient 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 O.OOE+00 mrem and organ dose was 0.OOE+00 for the year mrem (Table 3.2-1).3.3 Assessment of Dose to Member of Public During the period January to December, 2005, LaSalle County Station did not exceed these limits as shown in Table 3.1-1 and 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 5 127 of 203 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 E. 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 99.5% during 2005 (Table 3.4-1).*Nuclear Regulatory Commission, Regulatory Guide 1.109 (Rev. 1)6 128 of 203 4 APPENDIX E-1 DATA TABLES AND FIGURES E-1.1 129 of 203 Table 1.1-1 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2005)UNITS ONE AND TWO DOCKET NUMBERS 50-373 AND 50-374 GASEOUS EFFLUENTS-SUMMATION OF ALL RELEASES Estimated 4th Qtr ITotal Error %I Units I lstQtr I 2ndQtr I 3rdQtr I I I I l I I I A. Fission and Activation Gas Releases 1. Total Release Activity Ci 2.82E+03 1.86E+03 1.76E+03 1.74E+03 3.50E+01 2. Average Release Rate uCi/sec 3.62E+02 2.3!E+02 2.21E+02 2.19E+02 2. Percent of Technical Specification

% 3 *

• 2 2 Limit B. Iodine Releases 1. Total 1-131 Activity Ci 3.85E-02 1.91E-02 1.80E-02 1.33E-02 3.50E+01 2. Average Release Rate uCi/sec 4.95E-03 2.43E-03 2.26E-03 1.67E-03 3. Percent of Technical Specification

% 4 * * * *Limit C. Particulate

(> 8 day half-life)

Releases 1. Gross Activity Ci 6.57E-03 1.07E-02 5.54E-03 1.35E-03 3.30E+01 2. Average Release Rate uCi/secj 8.45E-04 1.36E-03 6.97E-04 1.70E-04 3. Percent of Technical Specification

% *Limit 3. Gross Alpha Activity Ci <1.OOE-1 1 <1.00E-11

<I.00E-1I 1 <1.OOE-1 I D. Tritium Releases 1. Total Release Activity Ci 1.47E+01 1.16E+01 2.05E+01 1.49E+01 2.10E+01 2. Average Release Rate uCi/sec 1.89E+00 1.48E+00 2.58E+00 1.87E+00[3. Percent of Technical Specification

% * * * *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 uCi/ml E-1.2 130 of 203 Table 1.2-1 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2005)LIQUID RELEASES UNIT I and UNIT 2 SUMMATION OF ALL LIQUID RELEASES IEstimated Total Error %I Units I lstQtr I 2ndQtr I 3rdQtr I 4thQtr I I m ......A. Fission and Activation Products 1. Total Activity Released Ci <LLD <LLD <LLD <LLD N/A 2. Average Concentration Released uCi/ml <LLD <LLD <LLD <LLD 3. Percent of Applicable Limit % * * * *B. Tritium 1. Total Activity Released --Ci <LLD <LLD <LLD <LLD N/A 2. Average Concentration Released uCi/ml <LLD <LLD <LLD <LLD 3. Percent of Applicable Limit % * * * *C. Dissolved Noble Gases 1. Total Activity Released Ci <LLD <LLD <LLD <LLD N/A 2. Average Concentration Released uCi/ml <LLD <LLD <LLD <LLD 3. Percent of Applicable Limit % * * * *D. Gross Alpha 1. Total Activity Released (estimate)

Ci <LLD <LLD <LLD <LLD N/A 2. Average Concentration Released uCi/ml <LLD <LLD <LLD <LLD 3. Percent of Applicable Limit %_*_* * *[E. Volume of Liquid Waste to Discharge liters 0.00E+00 0.OOE+00 0.00E+00 0.00E+00 N/A IF. Volume of Dilution Water liters 0.OOE+00 0.OOE+00 0.00E+00 0.00E+00 1 N/A This information is contained in the Radiological Impact on Man section of the report."<" Indicates activity of sample is less than LLD given in uCi/mI E-1.3 131 of 203 Table 2.0-1 SOLID RADWASTE ANNUAL REPORT LaSalle County Station Table 2.0-1 had been deliberately deleted. For solid waste disposal detail, refer to the LaSalle County Station 2005 Effluent Report.E-1.4 132 of 203 Table 3.1-1 LASALLE STATION UNIT ONE ACTUAL 2005 MAXIMUM DOSES RESULTING FROM AIRBORNE RELEASES PERIOD Op RELEASE -01/o1/0S TO 12/31/05 CALCULATED 03/29/06 INFANT RECEPTOR 1ST TYPE QUARTER JAN-MAR GAMMA AIR 4.21-02 (MAD) (WSWC )BETA AIR 1.73E-03 (MAD) (ESE )TOT. BODY 3.11E-02 MEWtN (WSW SKIN 3.29E-02 Cimnrl (aWS)ORGAN 1.94E-03 (81M) ( )ESE THYROID THIS IS A REPORT FOR THE 2ND 3RD QUARTER QUARTER APR-JUN JUL-SEP 3.75E-02 3.60E-02 (wS ) (WWW)1.263-03 1.27E-03 (ESE ) (101 2.833-02 2.721-02 (MWSW) (WSW )2.99E-02 2.07E-02 (WSW) (we )3,723-02 4.61E-02 (ESE ) ,(ESE )THYROID THYROID CALENDAR YEAR 2005 4TH QUARTER OCT-DEC 3.63E-02 (wSW)1.20E-03 (BESE)2.75E-02 (WSW )2.89E-02 (WSW)1.32E-02 (ESE)THYROID 1.511-01 (WSW 8.45E-03 ,(ESE )1.24E- Ol (WSW )1.20E-01 9.84E-02 (ESE )THYROID GAMMA AIR BETA AIR (TOT. BODY SKIN (MM4;ORGAN (SRO1 QTRLY OBJ (NRA) S. C 4mAD) 10.0 (MRIM) 2.5 7.5 41 7.5 RESULTS BAS COMPLIANCE STATUS -10CFR 50 APP. I INFANT RECEPTOR------------

% OF APP I. -..........

IST QTR 2ND 0TR 3RD QTR 4TH QTR YRLY JAN-MAR, APR-JUN JUL-SEP OCT-DEC O9 0.62 0.75 0.72 0.73 10.0 0.02 0.01 0.01 0.01 20.0 1.24 1.13 1.09 1.10 5.0 0.44 0.40 0.38 0.39 15.0 0.03 0.50 0.61 0.18 15.0 THYROID THYROID THYROID THYROID T1 ED UPON: 0D04 ANNEX REVISION 3.0 MAY 2001 ODCM SOFTWARE VERSION 1.1 January 1995 ODCM DATABASE VERSION 1.1 January 1995% OF APP. I 1.51 0.03 2.28 0.80 0.66 1YROID E-1.5 133 of 203 Table 3.1-1 (continued)

IASAMLE STATION UNIT ONE ACTUAL 2005 NAXIL414 DOSES RESULTING FROM AIRBORNE RELEASES PERIOD OF RELEASE -01/01/05 TO 12/3X/05 CALCULATED 03129106 CHILD RECEPTOR TYPE GAMMAAIR I (MAD)BETA AIR (PlEAD)TOT. BODY (MREE)SKIN ORGAN (MME)1ST QUARTER JAN-KMR 4.11E-02 (NSw)1,73E-03 (ESE )3.11E-02 (WSW)3.29E-02 (wSW)1.68E-03 (NNE)2ND QUARTER APR-JUN 3.75E-02 1.26E-03 (ESE )2.832-02 (WSW)2.99E-02 (WSW )3.94E-02 (ESE5)3RD QUARTER JUL-SEP 3.60E-02 1.27E-03 2.72E-02 (WSW )2.87E-02 5.36E-02 (MNE)4TH QUARTER OCT-DEC 3.63E-02 (WSW )1.20E-03 (ES28)2.75E-02 (WSW) -2.89E-02.(WSW )1.31E-02 (ESE2)THYROID ANNUAL 1.51E-01 (WSW)5.45E-03 (ESE )1, 14E-01 (WSW )1.20E-01 TY08O-01 THYROID THYROID THYROID THYROID THIS IS A REPORT FOR THE CALENDAR YEAR 2005 GAMMA AIR BETA AIR (TOT. BODY ORGAN (MRZ OTRL1 oEJ (MiAD) S.C NRAD) 10.0 (HREN) 2.5) 7.5 4) 7.5 RESULTS HaS COMPLIANCE STATUS :- 1OCFR 50 APP. I CHILD RECEPTOR------------

% OF APP I. -------------

lOT QTR 2ND GTR 3RD QTR 4TH QTR YRLY JAN-MAR APR-JUN JUL-SEP OCT-DEC OBJ 0.82 0.75 0.72 0.73 10.0 0.02 0.01 0.01 0.01 20.0 1.24 1.13 1.09 1.10 5.0 0.44 0.40 0.38 0.39 15.0 0.02 0.53 0.72 0.18 15.0 THYROID THYROID THYROID THYROID TI ED UPON! ODCM ANNEX REVISION 3.0 MAY 2001 ODCM SOFTWARE VERSION 1.1 January 1995 ODCM DATABASE VERSION 1.1 January 1995 t OF APP. I 1.51 0 .03 2.28 0.80 0.72 MYROID E-1.6?I 134 of 203 Table 3.1-1 (continued)

LASALLE STATION UNIT ONE ACTUAL 2005 XMAIUM4 DOSES RESULTING FROM AIRBORNE RELEASES PERIOD OF RELEASE -TO 12/312/05 CALCULATED 03/29/06 TEENAGER RECEPTOR TYPE GAMMA AIR (MRAD)BETA AIR (MRAD)TOT. BODY SKIN MEAN)OROAN (NEEM)lET QUARTER JAN-MAR 4.*11E-02 (WSW)1 .73E-03 (ESE )3.11E-02 (WSW )3.29E-02 (WSW )1.32E-03 (NEN!)2ND QUARTER AMR-JUN 3. 75E-02 (WSW )1.2CE-03 (ESE 2.039-02 (WSW )2.99E-02 (NWS)2.45!- 02 (MEN)3RD QUARTER JUL-SEP 3. 60E-02 1.27E-03 (ESE)2.72E-02 (WSW )2. 87E-02 (WSW )3.32E-02 (ME )4TH QUARTER OCT-DEC 3.63E-02 (WSW)1.20E-03 (ESE )2.75E-02 (WSW )2. 69E-02 8.09E-03THYROID ANNUAL 1.51E_01 (NWS)5.45E-03 (ESE )1.142-01 (NWS)1.20E-01 (WSW)6.719-02 (mm )THYROID THYROID THYROID THYROID THIS I8 A REPORT FOR THE CALENDA YEAR 2005 GAMMAIR BETA AIR (I TOT. EODY SKIN (mm ORGAN (MM~OTRLY O&J (KEAD) 5.0 a=) 10.0 (KREX) 2.5 7.5'M) '7.S RESULTS S COMPLIANCE STATUS -1OCFR 50 APP. I TEENAGER RECEPTOR-...........

% OF APP .-------------

IST QTR 2ND OTR 3RD QTR 4TH QTR YRLY JAN-MAR. APR-JUN JUL-SEP OCT-DEC OBJ 0.'82 0.75 0.72 0.73 10.0 0.02 0.01 0.01 0.01 20.0 1.24 1.13 1.09 1.10 5.0 0.44 0.40 0.38 0.39 15.0 0.02 0.33 0.44 0.11 15.0 THYROID THYROID THYROID THYROID ED UPON: ODCM ANNEX REVISION 3.0 MAY 2001 ODCK SOFTWARE VERSION 1. 1 January 1995 ODCM DATABASE VERSION 1.1 January 1995% OF APP. I 1.51 0.03 2.28 0.80 0.45 RYROID E-1.7 135 of 203 Table 3.1-1 (continued)

LASALLE STATION UNIT ONE ACTUAL 2005 AXIKtN DOSES RESULTING FROM AIRBORE RELEASES PERIOD OF RELEASE -01/01/OS TO 12/31/OS CALCULATED 03/29106 ADULT RECEPTOR IST 2ND 3RD TYPE QUARTER QUARTER QUARTER JAN-MAR APR-JUN JUL-SEP GAMMA AIR 4.11E-02 3.75E-02 3.60E-02-IMAD) (WSW ) I(145W ) (WSW )BETA AIR 1.73E-03 1.26E-03 1.27E-03 (MRAD) (ESE. ) (ESE ) (ESE )TOT. BODY 3.11E-02 2.83E-02 2.72E-02 (MREM) (WSW ) (WSW I (WSW )SKIN 3.29E-02 2.99E-02 2.87k-02 (M1RE) (WSW ) ((WSW (WSW )ORGAN 1.38E-03 2.53E-02 3,38E-02 (MR124) (WNE) (mNE) (HNE )THYROID THYROID THYROID THIS IS A REPORT FOR THE CALENDAR YEAR 2005 4TH QUARTER OCT-DEC 3.63E-02 (WSW )1.20E-03 (ESE )2.75E-02 (WSW )2.89E-02 (WSW )8.48E-03 (MNE)THYROID ANNU1AL 1.51E-01 5.45E-03 (ESE )1.14E-01 (WSW )1.20E-01 (WSW)6.90E-02 (NE)THYROID GAMMA AIR BETA AIR (TOT. BODY SKIN (mM)ORGAN (IRE1 QTRL1 OBJ (MRAD) 5.A.a=) 10.0 (MREM) 2.5 7T 5) 7 .S RESULTS BAS COMPLIANCE STATUS -10CFR 50 APP. I ADULT RECEPTOR-- -OF APP I. -------------

IST QTR 2ND qR 3RD QTR 4TH QT YRLY JAN-MAR APR-JUN JUL-SEP OCT-DEC O9 0.82 0.75 0.72 0.73 10.0 0.02 0.01 0.01 0.01 20.0 1.24 1.13 1.09 1.10 5.0 0.44 0.40 0.38 0.39 15.0 0.02 0.34 0.45 0.11 15.0 THYROID THYROID THYROID THYROID ED UPON. ODCM ANNEX REVISION 3.0 MAY 2001 ODCM SOFTWARE VERSION 1.1 January 1999 ODCM DATABASE VERSION 1.1 January 1995% OF APP. I 1.52 0.03 2.28 0.80 0.46 FIYROID E-1.8 136 of 203 Table 3.2-1 DOSE']TOTAL BODY INTERN ORGAN LASALLE STATION UNIT ONE ACTUAL 2005 MAXIMUM DOSES (MM5) RESULTING FROM AQUATIC EFFLUENTS PERIOD OF RELEASE -01/01/os TO 12/31/05 CALCULATED 03/29/06 INFANT RECEPTOR 1ST 2ND 3RD 4TH WYPE QUARTER QUARTER QUARTER QUARTER AMl JAN-MAR APR-JUN -JUL- SEP OCT-DEC 0.00E0O 0.00E+00 0.00E+00 0.00E+00 0.4 lAL 0.OOE+00 0.00E+00 0.OOE+00 0.OOE+O0 0.OOE+O0 OOE÷O0 THIS 1 A 'REPORT FOR THE CALENMA YEAR 200S TOTAL BODY (KUM)CRIT. ORGAN(MREN)

OThI.5.COMPLIANCE STATUS -10 CFR 50 APP. I----------

t OF APP I --------------

LY 1ST TR 2ND QTR 3RD QTR 4T1 QTR 7 JAN-MAR APR-JUN JUL-SEP OCT-DEC.S 0.00 0.00 0,06 0.00 ,0 0.00 0.00 0.00 0.00 YRLY OJ 3.0 10.0 I OP APP. I 0.00 0.00 RESULTS BAED UPONt 0" ANNEX REVISION SODC'M SOFTWARE VERSION ODCM DATABASE VERSION 3.0 NAY 2001 1.1 January 1995 1.1 January 1995 E-1.9 137 of 203 Table 3.2-1 (continued)

LASALLE STATION MNIT ONE ACTUAL 2005 MAXIMUM DOSES (MME) RESUTING FROM AQUATIC EFFLUENTS PERIOD OF RELEASE -01/01/0S TO 12/31/05 CALCUIATED 03/29/06 CHILD RECEPTOR IST 2ND 3RD 4TH QUARTER QUARTER QUARTER QUARTER AM JAN-MAR APR-JUN JUL-:SEP OCT-DEC 0.ooE,+00 0.OOE÷00 0.OOE+00 0.00E+00 0.4 0.00E+00 0.O0E+00 0.OOE+00 0.00E+00 0.DOSE T TOTAL BODY INTERb ORGA=OOE+00 OOE+00 THIS IS A REPORT FOR THE CALENDAR YEAR 2005 COMPLIANCE STATUS -10 CFR 50 APP. I---------

% OF APP I. -------------

LY 1ST 0TR 2ND QTR 3RD QTR 4TH QTR T JAN-MAR APR-JUN JUL-SEP OCT-DEC.5 0.00 0.00 0.00 0.00 TOTAL BODY MREM)CRIT. ORGAN(KREM)

OTRIn.: 1 5.YRLY % OF OBJ APP. I 3.0 0.00 10.0 0.00 0" 0.00 0.00 0.00 0.00 RESULTS BASED UWON: ODCM ANNEX REVISION ODCM SOFTWARE VERSION ODCM DATABASE VERSION 3.0 MAY 2001 1.1 January 1995 1.1 January 1995 E-1.10 138 of 203 Table 3.2-1 (continued)

LASALLE STATION UNIT ONE ACTUAL 2005 MAXIMUM DOSES (MREM) RESULTING FROM AQUATIC EFFLUENTS PERIOD OF RELEAS E -01/01/05 TO 12/31/05 CALCULATED 03/29106 TEENAGER RECEPTOR DOSE TYPE TOTAL BODY-INTERNAL ORGAN IST QUARTER JAN-MAR O.OOE00 O. OOE÷O0 2ND QUARTER APR-JIUN 0. OOE+00 0. O0Ee00 3RD QUARTER JUL-SEP 0.00E+00 0.00E+00 4TH QUARTER OCT-DEC 0.00E+00 0.00E+00 0.00E+00 0.OOE+00 THIS IS A'REPORT FOR THE CALENDAR YEAR 2005 TOTAL BODY (MREV0 CRIT. ORGAN WMREN)1 5.COMPLIANCE STATUS -C PR 50 APP. IP I. -------------

IY 1ST rTR 2ND QTR 3RD QTR 4TH QT0 JAN-14AR APR-JUN~ JUL-SEP OCT-DEC 5 0.00 0.00 0.00 0.00 0 0.00 0.00 0.00 0.00 YRLY OBJ 3.0 10.0* OF APP. I 0.00 0.00 RESULTS BASED UPON: ODCM ANNEX REVISION ODCM SOFTWARE VERSION ODCM DATABASE VERSION 3.0 MAY 2001 1.1 January 1995 1.1 January 1995 E-1.11 139 of 203 Table 3.2-1 (continued)

LASALLE STATION UNIT ONE ACTUAL 2005 MAXIMUM DOSES (mREm) RESULTING FROM AQUATIC EFFLUENTS MERiOD OF RELEASE -01/01/05 TO 12/31/05 CALCULATED 03/29/06 ADULT RECEPTOR IST 2ND 3RD 4TH QPE QUARTER QUARTER QUARTER QUARTER ANNUAL JAN-MAR APR-JUN JUL-SEP OCT-DEC 0.00E÷00 0.00,E00 0.00E+00 0.00E+00 0.00g+AL 0.OO+00 0.00E+00 0.00E+00 0.00*E00 0.00E4 DOSE T TOTAL BODY INTERN ORGAN 00 00 THIS is A REPORT FOR TH= CALENDAR YEAR 2005 COMPLIANCE STATUS -10 CFR 50 APP. I----------

-% OF APP I. ------------

QTRLY IST 0TR 2ND 0TR 3RD QTR 4TH QTR OBJ JAN-KAR APR-JUN JUL-SEP OCT-DEC TOTAL BODY (MEEK) 1.5 0.00 0.00 0.00 0.00 CRIT. ORGAN(M(M) 5.0 0.00 0.00 0.00 0.00 YRLY Oaj 3.0 10.0 t Or APP. I 0.00 0.00 RESULTS BASED UPON;ODC! ANNEX REVISION ODCM SOFTWARE VERSION ODC1 DATABASE VERSION 3.0 MAY 2001 1.1 January 1995 1.1 January 1995 E- 1.12 140 of 203 A' Table 3.3-1 LSALLE STATION UNIT ONE 10 CFR 20 COMPLIANCE ASSESSMENT PERIOD OF ASSESSMENT 01/01/05 TO 12/31/OS CALCULKTED 03/29/06 1. 10 CFR 20.1301 (a) (11 Coml~iance Total Effective Dome Eqivalent, mrem/yr 4.75E-01 10 CFR 20.1301 (a)(1) limit Mrem/yr 100.0% of limit 0.47 Coapliance Summary -1OCPR20 lst 2nd 3rd 4th % of Qtr Qtr Qtr Qtr Limit TEDE 1.19E-O1 1.19E-01 1.19E-01 1.27B-01 0.47 RESULTS BASED UPON: OD04 ANNEX REVISION 3.0 MAY 2001 ODCM SOFTWARE VERSION 1.1 January 199S ODCM DATABASE VERSION 1.1 January 1995 E-1.13 141 of 203 Table 3.3-1 (continued)

LASALLE STATION UNIT ONE 10 CFR 20 COMPLIANCE ASSESSMENT PERIOD OF ASSESSMENT 01/01105 TO 12/31/05 CALCULATED 03/29/06 2. 10 CPA 20.130o (d)/40 CPR 190 Comoliaree whole Body (DDE)Organ Dose (CDE)Flume Skyshine Ground Total.Thyroid Gon~ads Breast MarroW Remainder CEDE TEDE Dose (mrem)1. 24E-01 3-.50E-01 2.05E-03 4.66E-01 S. 99E-02 6.75E-03 9-.719-03 6.71E-03 6.74V-0-3 6.741-0-3 9. 95E-03 8.39E-03 4.7SE-01 Limit % of (Mrem) Limit 25.0 i.86 75.0 0.08 25.0 0.03 25.0 0.03 29.0 0.03 25.0 0.03 25.0 0.03 25.0 0.03 100.0 0.47 RESU7LTS EASED UPON:z OtDCM ODCM ODCM ANNEX REVISION 3.0 MAY 2001 SOE-TARE VERSION 1.1 January 1995 DATABASE VERSION 1.1 January 1995 E-1.14 9, 142 of 203 Table 3.3-1 (continued)

LASAILE STATION UNIT TWO 10 CFR_ 20 COMPLIANCE ASSESSMENT PERIOD OF ASSESSM.ENT 01/01/05 10 12/31/05 CALCULATED 03/29/06 1. 10 CFR 20.1301 (a)(1) Compliance Total Effective Dome Eqivalent, mrem/yr 3.15E-01 10 CFR 20.1301 (a)(1) limit mrem/yr 100.0 t of limit 0.31 Coupliance Su'wmary -10CYR20 lot 2nd 3rd 4tb t of Qtr Qtr Qtr Qtr Limit TEDE S.00E-02 8.76E-02 8.74E-02 8.98E-02 0.31 RESULTS BASED UPON: 00CM ANNEX REVISION 3.0 MAY 2001 ODCM SOFTWARE VERSION 1.1 January 1995 ODCM DATABASE VERSION 1.1 January 1995 E-1.15 143 of 203 Table 3.3-1 (continued)

LASALLE STATION UNIT TWO 10 CPP. 20 COMPLIANCE ASSES&SNT PERIOD OF ASSESSMENT 01/01/05 TO 12/31/05 CALCULATED 03/29/06 2. 10 CFR 20.1301 Wd140 CPR 190 Compliance Whole Body (DDE)Organ Dose (CDE)Plume Skyehine Ground Total Thyroid Gonads Breast Lung Marrow Bone Remainder CEDE TEDE Dose 0.00E+QO 0. 00E+00 3.25E-01 0.O0E+00 0.OOE+00 0.OOE+00 0.00E+05 0. OOE+00 0.00E+00 0.005,00 Limit % of (toremo) Limit 25.0 1.29 75.0 0.00=5. 0 -O.oo 25.0 0.00 250 0.00 2S.0 0.00 25.0 0.00 100.0 0.31 RESULTS BASED UPON: ODCM ODCM OfX4 ANNEX REVISION 3.0 MAY 2001 SOFTWARE VERSION 1.1 January 1995 DATABASE VERSION 1.1 January 1995 E-1.16 144 of 203 Table 3.4-1 LaSalle Station -MAXIMUM DOSES RESULTING FROM 2005 Unit 1 AIRBORNE RELEASES TYPE OF DOSE GAMMA AIR (mrad)BETA AIR (mrad)WHOLE BODY (mrem)SKIN (mrem)ORGAN (mrem)CRITICAL PERSON CRITICAL ORGAN FIRST QUARTER SECOND QUARTER 4.630E-02(WSW) 3.520E-02(WSW) 6.850E-03( SE) 2.605E-03(WSW) 1.280E-02(SSW) 9.150E-03( SW)1.820E-02( SE) 1.190E-02( SW)9.800E-04( SE) 3.135E-04(WSW)

Child Child Thyroid Thyroid THIRD QUARTER FOURTH QUARTER 3.665E-02(WSW) 2.245E-02( SW)'3.340E-03( S ) 2.680E-03(ESE) 1.365E-02(SSW) 8.250E-03(ESE) 1.620E-02(SSW) 1.130E-02(ESE) 3.400E-04( S ) 2.120E-04(ESE)

Child Child Thyroid Thyroid ANNUAL 1.379E-01(WSW) 1.277E-02( SE)3.935E-02(SSW) 4.670E-02(SSW) 1.568E-03( SE)Child Thyroid TYPE OF DOSE GAMMA AIR (mrad)BETA AIR (mrad)WHOLE BODY (mrem)SKIN (mrem)ORGAN (mrem)CRITICAL PERSON CRITICAL ORGAN COMPLIANCE STATUS 10 CFR 50 APP. I 10 CFR 50 APP.I QUARTERLY OBJECTIVE

% OF APP. I YEARLY OBJECTIVE

% OF APP. I 5.0 0.93 10.0 1.38 10.0 0.07 20.0 0.06 2.5 0.55 5.0 0.79 7.5 0.24 15.0 0.31 7.5 0.01 15.0 0.01 Child Child Thyroid Thyroid Calculation used release data from the following:

Unit 0 -Chimney E- 1.17 145 of 203 Table 3.4-1 (continued)

LaSalle Station -Unit 2 MAXIMUM DOSES RESULTING FROM AIRBORNE RELEASES 2005 TYPE OF DOSE FIRST QUARTER SECOND QUARTER THIRD QUARTER FOURTH QUARTER ANNUAL GAMMA AIR (mrad)BETA AIR (mrad)WHOLE BODY (mrem)SKIN (mrem)ORGAN (mrem)CRITICAL PERSON CRITICAL ORGAN 4.630E-02(WSW) 6.850E-03( SE)1.280E-02 (SSW)1.820E-021 SE)9.800E-04( SE)3.520E-02(WSW) 2.605E-03(WSW) 9.150E-03( SW)1.190E-02( SW)3.135E-04(WSW) 3.665E-02(WSW) 3.340E-03( S )1.365E-02(SSW) 1.620E-02(SSW) 3.400E-04( S )2.245E-02( SW)2.680E-03(ESE) 8.250E-03(ESE) 1.130E-02(ESE) 2.120E-04(ESE) 1.379E-01(WSW) 1,.277E-02( SE)3.935E-02(SSW) 4.670E-02(SSW) 1.568E-03( SE)Child Thyroid Child Thyroid Child Thyroid Child Thyroid Child Thyroid COMPLIANCE STATUS 10 CFR 50 APP. I QUARTERLY OBJECTIVE

% OF APP. I 10 CFR 50 APP.I YEARLY OBJECTIVE TYPE OF DOSE% OF APP. I GAMMA AIR (mrad)BETA AIR (mrad)WHOLE BODY (mrem)SKIN (mrem)ORGAN (mrem)CRITICAL PERSON CRITICAL ORGAN 5.0 10.0 2.5 7.5 7.5 0.93 0.07 0.55 0.24 0.01 10.0 20.0 5.0 15.0 15.0 1.38 0.06 0.79 0.31 0.01 Child Thyroid Child Thyroid Calculation used release data from the following:

Unit 0 -Chimney Data Recovery 99.5%(Priority parameters)

E-1.18 146 of 203/

APPENDIX F METEOROLOGICAL 147 of 203 LaSalle Nuclear Station Period of Record: January -March 20.05 Stability Class -Extremely Unstable -200Ft-33Ft Delta-T (F)Winds Measured at, 33 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable Total 1-3 4-7 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 8-12 13-18 19-24 > 24 0 0 0 0 0 0 0 0 0 0 0 0.0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Total 0 0, 0 0 0 0 0 0 4 0 0 0 0 0 0 0 0 4 0 0 1 3 Hours of calm in this stability class: Hours of missing wind measurements in this Hours of missing stability measurements in 0 stability class: 0 all stability classes: 0 148 of 203 LaSalle Nuclear Station Period of Record: January -March 2005 Stability Class -Moderately Unstable -200Ft-33Ft Delta-T (F)Winds Measured at 33 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 4-7 8-12 13-18 19-24 > 24 Total Total 0 0 3 8 7 0 18 Hours of.calm in this stability class: Hours of missing wind measurements in this Hours of missing stability measurements in 0 stability class: 0 all stability classes: 0 149 of 203 LaSalle Nuclear Station Period of Record: January -March 2005 Stability Class -Slightly Unstable -200Ft-33Ft Winds Measured at, 33 Feet Delta-T (F)Wind Speed (in mph)Wind Direction N NNE NE 1-3 0 0 0 4-7 8-12 13-18 19-24 > 24 Total 0 0 6 1 3 0 3 2 0 2 2 8 0 0 0 0 7, 8 ENE 0 0 0 11 E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 0 0 0 0 1 0 0 0 0 3 5 1 2 6 1 4 7 5 0 15 0 11 0 0 7 0 Total 0 10 33 37 18 1 99 Hours of Hours of Hours of calm in missing missing this stability class: wind measurements in this stability measurements in 0 stability class: 0 all stability classes: 0 150 of 203?I LaSalle Nuclear Station Period of Record: January -March 2005 Stability Class -Neutral-200Ft-33Ft Delta-T (F)Winds Measured at 33 Feet Wind Speed (in mph)Wind Direction N NNE NF ENE E.ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 4-7 2 0 1 1 0 0 1 1 5 1 0 1 1 1 0 0 21 27 10 8 14 10 7 3 4 9 12 8 24 20 12 8 0 8-12 13-18 19-24 > 24 54 6 5 0 51 3 0 0 45 33 12 0 31 42 11 0 30 22 2 0 12 28 7 0 8 16 3 0 4 2 0 0 4 10 10 3 10 9 2 1 17 7 3 0 8 6 3 0 14 14 11 2 25 26 10 8 44 46 16 0 109 62 19 0 0 0 0 0 Total 88 81 101 93 69 57 34 10 32 36 40 25 66 90 119 198 0 Total 16 197 466 332 114 14 1139 Hours of.calm in this stability class: Hours of missing wind measurements in this Hours of missing stability measurements in 0 stability class: 0 all stability classes: 0 151 of 203 LaSalle Nuclear Station Period of Record: January -March 2005 Stability Class -Slightly Stable Winds Measured at--200Ft-33Ft Delta-T (F)33 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 4-7 8-12 13-18 19-24 > 24 Total 2 39 5 6 3 0 55 2 19 3 0 0 0 24.1 2 18 1 0 0. 22 0 3 12 13 0 0 28 2 12 41 8 0 0 63 3 6 21 8 0 0 38 2 4 7 1 0 0 14 2 7 11 3 0 0 23 2 7 14 1 3 0 27 0 7 13 8 8 0 36 1 3 15 11 6 4 40 1 2 8 10 6 0 27 0 3 8 7 3 2 23 1 9 5 7 8 3 33 2 9 25 5 1 0 42 1 17 10 2 0 0 30 0 0 0 0 0 0 0 Total 22 149 216 91 38 9 525 Hours of calm in this stability class: Hours of missing wind measurements in this Hours of missing stability measurements in 0 stability class: 0 all stability classes: 0 152 of 203 A LaSalle Nuclear Station Period of Record: January -March 2005 Stability Class -Moderately Stable Winds Measured at-200Ft-33Ft Delta-T (F)33 Feet Wind Speed (in mph)Wind Direction N NNE ENE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 4-7 8-12 13-18 19-24 > 24 Total 1 2 0 1 7 12 6 1 4 1 6 5 7 6 3 2 0 0 0 0 0 1 4 2 9 9 6 9 11 3 1 5 2 0 2 3 2 4 9 18 10 22 15 20 20 23 11 9 9 4 0 Total 20 64 62 32 3 0 181 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: 0 153 of 203 LaSalle Nuclear Station Period of Record: January -March 2005 Stability Class -Extremely Stable Winds Measured at--200Ft-33Ft Delta-T (F)33 Feet Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable Wind Speed (in mph)1-3 4-7 8-12 13-18 19-24 > 24 Total 0 0 0 0 0 0 0 0 0 0 0 0 0 0.0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 3 0 0 0 0 4 0 5 1 0 0 0 6 1 4 2 0 0 0 7 0 6 9 0 0 0 15 0 4 17 2 0 0 23 0 4 15 0 0 0 19 0 2 17 5 0 0 24 0 9 3 2 0 0 14 1 9 6 0 0 0 16 0 4 0 0 0 0 4 0 0 0 0 0 0 0 0 0 2 0 0 0 2 0 0 0 0 0 0 0 Total 3 50 72 9 0 0 134 Hours of calm in this stability class: Hours of missing wind measurements in this Hours of missing stability measurements in 0 stability class: all stability cl 0 asses: 0 154 of 203 LaSalle Nuclear Station Period of Record: January -March 2005 Stability Class -Extremely Unstable -375Ft-33Ft Winds Measured at 375 Feet Delta-T (F)Wind Speed (in mph)Wind Direction 1-3 4-7 8-12 13-18 x N 0 0 0 0 NNE 0 0 0 0 NE 0 0 0 0 ENE 0 0 0 0 E. 0 0 0 0 ESE 0 0 0 0 SE 0 0 0 0 SSE 0 0 0 0 SSE 0 0 0 0 SSW 0 0 0 0 SW 0 0 0 0 WSW 0 0 0 0 W 0 0 0 0 WNW 0 0 0 0 NW 0 0 0 0 NNW 0 0 0 0 rariable 0 0 0 0 19-24 > 24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Total 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Total 0 0 0 0 0 0 Hours of.calm in this stability class: Hours of missing wind measurements in this Hours of missing stability measurements in 0 stability class: 0 all stability classes: 2 155 of 203 LaSalle Nuclear Station Period of Record: January -March 2005 Stability Class -Moderately Unstable -375Ft-33Ft Delta-T (F)Winds Measured at' 375 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable Total 1-3 4-7 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 8-12 13-18 19-24 > 24 0 0 0 0 0 0 0 0 0 0 0 0.0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Total 0 0.0 0 0 0 0 0 2 0 0 0 0 0 0 0 0 2 0 0 0 0 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 A 156 of 203 LaSalle Nuclear Station Period of Record: January -March 2005 Stability Class -Slightly Unstable -375Ft-33Ft Delta-T (F)Winds Measured at 375 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E.ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 4-7 8-12 13-18 19-24 > 24 0 0 0 0 0 1 0 0 0 0 0 0 90 0 0 1 0 0 0 0 0 3 0 0 0 0 0 0 0 0 0 0 0 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Total I 0 1 3 0 2 0 0 2 1 0 0 0 0 1 0 0 Total 0 0 1 4 3 3 11 Hours of.calm in this stability class: Hours of missing wind measurements in this Hours of missing stability measurements in 0 stability class: 0 all stability classes: 2 157 of 203 LaSalle Nuclear Station Period of Record: January -March 2005 Stability Class -Neutral -375Ft-33Ft Delta-T (F)Winds Measured at' 375 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 4-7 0 1 0 1 0 0 1 0 0 0 1 0 0 1 3 0 12 9 5 4 4 9 2 5 6 2 7 6 6 5 9 5 0 8-12 13-18 19-24 > 24 26 44 11 8 22 41 3 1 13 49 28 16.26 32 32 20 11 13 14 4 11 8 18 15 4 6 7 4 0 4 5 4 7 3 6 17 7 4 5 5 13 10 3 6 2 11 5 10 21 14 12 10 26 18 18 24 47 83 50 45 32 50 21 9 0 0 0 0 Total 101 77, ill 115 46 61 24 18 39 23 40 35 63 91 235 120 0 Total 9 96 268 390 238 198 1199 Hours of calm in this stability class: Hours of missing wind measurements in this Hours of missing stability measurements in 0 stability class: 112 all stability classes: 2 158 of 203 LaSalle Nuclear Station Period of Record: January -March 2005 Stability Class -Slightly Stable -375Ft-33Ft Delta-T (F)Winds Measured at 375 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E, ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 4-7 0 1 0 7 ,i 1 0 19 0 6 0 6 0 6 0 1 0 5 1 1 1 2 0 2 3 3 0 3 0 0 1 0 0 0 8-12 13-18 19-24 > 24 Total 7 17 9 13 13 5 5 4 4 3 2 2 3 8 5 10 0 9 11 17 8 17 5 5 3 2 8 4 1 8 4 22 9 0 133 4 0 1 6 7 23 3 8 15 15 12 8 6 7 6 7 0 4 0 0 0 3 4 1 10 6 24 20 15 15 29 6 3 0 140 25 35 29 46 46 43 20 26 32 52 41 28 38 51 39 30 0 581 Total 7 63 110 128 Hoursof calm in this stability class: Hours of missing wind measurements in this Hours of missing stability measurements in 0 stability class: 19 all stability classes: 2 159 of 203 LaSalle Nuclear Station Period of Record: January -March 2005 Stability Class -Moderately Stable -375Ft-33Ft Winds Measured at, 375 Feet Delta-T (F)Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 4-7 0 0 0 0 1 1 0 0 1 0 0 0 0 0 0 0 0 1 0 0 0 1 3 2 1 3 2 2 0 1 1 2 0 0 8-12 13-18 19-24 > 24 1 2 0 0 1 2 0 0 0 0 0 0.0 0 1 0 1 1 0 0 1 0 0 1 5 1 0 3 4 0 0 6 3 3 6 15 1 2 1 4 1 2 2 8 0 5 4 15 4 2 3 3 6 1 2 2 5 4 2 0 0 1 1 0 0 0 0 0 Total 4 3.0 1 4 6 11 11 31 10 15 24 13 12 13 2 0 Total 3 19 33 26 22 57 160 Hours of calm in this stability class: Hours of missing wind measurements in this Hours of missing stability measurements in 0 stability class: 0 all stability classes: 2 160 of 203 LaSalle Nuclear Station Period of Record: January -March 2005 Stability Class -Extremely Stable -375Ft-33Ft Winds Measured at 375 Feet Delta-T (F)Wind Speed (in mph)Wind Direction N NNE NF ENE E.ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 4-7 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 8-12 13-18 19-24 > 24 0 0 1 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 2 2 1 1 1 1 0 1 3 7 0 6 3 7 2 2 5 16 0 0 0 9 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 Total 1 1 0 0 0 0 6 4 11 16 25 9 0 1 0 0 0 Total 0 0 4 12 15 43 74 Hours of.calm in this stability class: Hours of missing wind measurements in this Hours of missing stability measurements in 0 stability class: 0 all stability classes: 2 161 of 203 LaSalle Nuclear Station Period of Record: April -June 20.05 Stability Class -Extremely Unstable -200Ft-33Ft Delta-T (F)Winds Measured at, 33 Feet Wind Speed (in mph)Wind Direction 1-3 4-7 8-12 13-18 19-24 N 0 0 2 0 0 NNE 0 0 1 4 0 NE 0 0 2 0 1 ENE 0 0 0 1 0 E 0 0 0 0 0 ESE 0 0 0 0 0 SE 0 0 0 0 0 SSE 0 0 0 0 0 S 0 0 2 9 1 SSW 0 0 2 8 3 SW 0 0 3 5 2 WSW 0 0 3 12 3 W 0 0 1 13 2 WNW 0 0 0 7 0 NW 0 0 1 1 1 NNW 0 0 0 0 0 tariable 0 0 0 0 0> 24 0 0 0.0 0 0 0 0 0 1 0 0 0 0 0 0 0 Total 2 5, 3 I 0 0 0 0 12 14 10 18 16 7 3 0 0 Total 0 0 17 60 13 1 91 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: 0 162 of 203 LaSalle Nuclear Station Period of Record: April -June 2005 Stability Class -Moderately Unstable -200Ft-33Ft Delta-T (F)Winds Measured at 33 Feet Wind Speed (in mph)Wind Direction N NNE 1-3 0 0 4-7 8-12 13-18 19-24 > 24 Total 0 1 2 4 2 3 ENE E.ESE SE SSE S SSW SW WSW ,0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 2 1 1 5 2 1 0 0 0 0 10 4 8 0 0 0 0 0 0 7 2 0 0 9 7 0 11 0 11 0 10 0 11 1 18 0 10 W WNW NW NNW Variable Total 0 0 0 0 0 2 3 6 3 0 8 9 2 2 0 0 0 6 0 4 49 57 13 1 124 Hours of.Hours of Hours of calm in missing missing this stability class: wind measurements in this stability measurements in 0 stability class: 0 all stability classes: 0 163 of 203 LaSalle Nuclear Station Period of Record: April -June 2005 Stability Class -Slightly Unstable Winds Measured at,-200Ft-33Ft Delta-T (F)33 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 4-7 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 2 2 2 0 1 1 0 1 2 3 5 2 1 0 1 0 8-12 13-18 19-24 > 24 1 4 0 0 3 2 0 0 9 2 3 0 10 1 0 0 6 4 4 1 1 1 0 0 3 1 1 0 3 5 1 0 9 5 1 0 9 3 1 0 8 5 2 0 2 5 3 0 5 6 1 0 8 17 6 3 4 3 3 0 0 2 5 0 0 0 0 0 Total 6 7.16 13 15 3 6 9 16 15 18 15 14 35 10 8 0 Total 0 24 81 66 31 4 206 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: 0 164 of 203 LaSalle Nuclear Station Period of Record: April -June 2005 Stability Class -Neutral Winds Measured at-200Ft-33Ft Delta-T (F)33 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E,-ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 4-7 0 0 2 0 1 0 1 0 1 0 2 2 0 0 1 0 2 7 12 8 12 12 8.7 8 6 10 16 7 8 4 2 0 8-12 13-18 19-24 > 24 12 15 4 0 21 14 0 0 21 29 9 0 30 13 2 0 28 21 10 0 19 6 0 0 15 9 1 1 10 13 2 0 12 10 3 0 21 12 3 0 13 10 3 0 15 9 4 0 16 15 14 0 12 24 21 5 11 15 1 1 3 15 18 0 0 0 0 0 Total 33 42 72 55 71 38 34 33 33 43 36 46 54 70 32 39 0 Total 11 129 259 230 95 7 731 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: 0 165 of 203 LaSalle Nuclear Station Period of Record: April -June 2005 Stability Class -Slightly Stable Winds Measured atý-200Ft-33Ft Delta-T (F)33 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 4-7 3 0 1 1 2 1 2 0 0 1 1 1 1 2 0 2 0 10 24 9 4 16 11 7 6 7 4 3 8 7 10 6 1 0 8-12 13-18 19-24 > 24 1 0 0 0 8 2 0 0 19 5 0 0.17 17 1 0 29 9 3 0 9 7 8 0 7 1 1 0 7 6 0 0 15 9 1 0 15 10 0 0 10 12 0 0 20 2 2 0 16 13 3 0 10 15 4 0 4 0 0 0 3 2 1 0 0 0 0 0 Total 14 34.34 40 59 36 18 19 32 30 26 33 40 41 10 9 0 Total 18 133 190 110 24 0 475 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: 0 166 of 203?I LaSalle Nuclear Station Period of Record: April -June 2005 Stability Class -Moderately Stable -200Ft-33Ft Winds Measured at 33 Feet Delta-T (F)Wind Speed (in mph)Wind Direction N 1-3 2 4-7 8-12 13-18 19-24 0> 24 Total 5 NNE 2 11 0 0 0 1 Q 0 2 ENE 1 1 14 27 ESE SE SSE 0 6 6 0 0 0 1 0 3 1 3 2 2 1 0 0 0 0 0 0 0 0 0 0 0 1 10 11 7 0 0 0 13 0 5 1 11 6 9 S 2 7 0 42 0 15 0 23 0 21 0 20 0 33 0 22 0 25 0 16 0 23 SSW SW WSW 2 14 15 0 10 11 3 2 7 15 0 0 W WNW NW NNW Variable Total 9 1 15 2 2 0 3 5 0 5 7 3 0 0 116 0 0 0 0 0 13 0 0 0 0 0 0 0 0 0 8 7 0 22 129 0 280 Hours of.calm in Hours of missing Hours of missing this stability class: wind measurements in this stability measurements in 0 stability class: 0 all stability classes: 0 167 of 203 LaSalle Nuclear Station Period of Record: April -June 2005 Stability Class -Extremely Stable -200Ft-33Ft Delta-T (F)Winds Measured at- 33 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 4-7 0 0 0 0 0 0 0 0 1 2 0 1 0 0 0 0 0 0 0 0 0 4 17 20 25 16 21 8 13 12 8 2 0 0 8-12 13-18 19-24 > 24 0 0 0 0 0 0 0 0 0 0 0 0.0 0 0 0 6 0 0 0 15 0 0 0 5 0 0 0 14 1 0 0 11 1 0 0 16 2 0 0 20 0 0 0 21 0 0 0 5 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Total 0 0, 0 0 10 32 25 40 29 41 28 35 17 9 2 0 0 Total 4 146 114 4 0 0 268 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: 0 168 of 203 LaSalle Nuclear Station Period of Record: April -June 2005 Stability Class -Extremely Unstable -375Ft-33Ft Winds Measured at 375 Feet Delta-T (F)Wind Speed (in mph)Wind Direction 1-3 4-7 N 0 NNE 0 NE0 ENE 0 E. 0 ESE 0 SE 0 SSE 0 S 0 SSW 0 SW 0 WSW 0 W 0 WNW 0 NW 0 NNW 0 Variable 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 8-12 13-18 19-24 > 24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Total 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Total 0 0 0 0 0 Hours of.calm in this stability class: Hours of missing wind measurements in this Hours of missing stability measurements in 0 stability class: 0 all stability classes: 4 169 of 203 LaSalle Nuclear Station Period of Record: April -June 2005 Stability Class -Moderately Unstable -375Ft-33Ft Delta-T (F)Winds Measured at 375 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 4-7 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 8-12 13-18 19-24 > 24 0 0 0 0 0 1 0 0 0 1 0 0.0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 4 1 0 1 0 0 1 0 2 0 0 1 6 0 0 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Total 0 1 1 0 0 0 0 0 6 1 3 7 2 0 0 0 0 Total 0 0 1 5 14 1 21 Hours of calm in this stability class: Hours of missing wind measurements in this Hours of missing stability measurements in 0 stability class: 0 all stability classes: 4 170 of 203 LaSalle Nuclear Station Period of Record: April -June 2005 Stability Class -Slightly Unstable -375Ft-33Ft Winds Measured at 375 Feet Delta-T (F)Wind Speed (in mph)Wind Direction N NNE NF ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 4-7 0 0.0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 8-12 13-18 19-24 > 24 1 2 0 0 1 0 6 0 4 4 0 2 0 4 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 4 3 1 0 4 7 3 1 2 2 3 3 2 5 1 1 2 3 0 0 2 0 0 0 0 0 0 2 0 0 0 0 0 0 0 Total 3 7 10 4 1 0 0 1 8 14 8 11 6 2 0 2 0 Total 0 0 14 27 26 10 77 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: 4 171 of 203 LaSalle Nuclear Station Period of Record: April -June 2005 Stability Class -Neutral-375Ft-33Ft Delta-T (F)Winds Measured at, 375 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 4-7 0 0 1 2 0 2 0 0 0 0 0 1 1 0 1 0 0 2 5 6 8 5 9 6 2 5 8 2 16 5 4 3 1 0 8-12 13-18 19-24 > 24 Total 4 10 22 8 46 14 14 22 5 60.24 27 18 19. 95 30 31 13 3 87 23 26 17 12 83 16 11 4 5 47 15 16 5 3 45 11 18 14 1 46 16 21 15 3 60 24 26 12 12 82 16 21 12 5 56 12 15 16 7 67 13 21 30 14 84 14 25 41 22 106 13 14 22 14 67 1 2 11 22 37 0 0 0 0 0 Total 8 87 246 298 274 155 1068 Hours of calm in this stability class: Hours of missing wind measurements in this Hours of missing stability measurements in 0 stability class: 1 all stability classes: 4 172 of 203 4 LaSalle Nuclear Station Period of Record: April -June 2005 Stability Class -Slightly Stable -375Ft-33Ft Winds Measured at 375 Feet Delta-T (F)Wind Speed (in mph)Wind Direction N NNE NF ENE E.ESE SE SSE S SSW SW WSW W WNW NW NNW Variable Total 1-3 4-7 8-12 13-18 19-24 > 24 0 3 4 3 0 0 0 6 3 11 4 1 0 5 8 25 7 1 1 3 7 22 10 0 0 4 7 12 11 9 2 1 9 4 7 14 0 2 4 4 7 3 0 1 6 12 3 8 1 1 3 8 12 13 3 3 1 7 9 22 0 5 6 12 10 10 0 1 5 2 10 9 0 4 5 5 18 24 1 0 2 12 21 24 0 1 5 12 3 1 0 0 6 3 1 1 0 0 0 0 0 0 Total 10 25 46 43 43 37 20 30 38 45 43 27 56 60 22 11 0 556 8 40 81 154 133 140 Hours of.calm in this stability class: Hours of missing wind measurements in this Hours of missing stability measurements in 0 stability class: 3 all stability classes: 4 173 of 203 LaSalle Nuclear Station Period of Record: April -June 2005 Stability Class -Moderately Stable -375Ft-33Ft Delta-T (F)Winds Measured at 375 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 4-7 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 1 1 3 0 0 1 0 2 2 0 0 0 2 0 3 0 0 8-12 13-18 19-24 > 24 1 1 0 0 2 1 0 0 1 3 3 0.2 7 1 0 2 4 6 0 1 10 8 2 5 3 5 6 3 5 8 7 1 11 7 12 9 10 10 22 4 14 13 13 2 4 11 2 5 8 6 1 3 11 5 1 3 6 10 3 0 2 1 0 0 0 0 0 Total 3 4.10 10 12 22 19 26 33 51 44 19 22 20 25 3 0 Total 1 15 44 100 94 69 323 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: 4 174 of 203 4' LaSalle Nuclear Station Period of Record: April -June 2005 Stability Class -Extremely Stable -375Ft-33Ft Winds Measured at 375 Feet Delta-T (F)Wind Speed (in mph)Wind Direction N NNE NE ENE E.ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 4-7 0 0 ,0 0 0 0 0 0 0 1 2 0 0 0 0 0 0 0 0 0 0 0 1 1 2 0 2 0 1 0 0 0 0 0 8-12 13-18 19-24 > 24 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 2 0 0 0 11 6 2 5 10 5 3 5 11 1 6 2 7 1 5 11 4 1 2 4 0 0 2 5 1 0 1 1 4 0 1 0 0 0 0 0 0 0 0 0 0 Total 1 0 0 0 0 4 12 25 24 19 23 8 8 6 1 0 0 Total 3 7 14 23 34 50 131 Hours of calm in this stability class: Hours of missing wind measurements in this Hours of missing stability measurements in 0 stability class: 0 all stability classes: 4 175 of 203 LaSalle Nuclear Station Period of Record: July -September 2005 Stability Class -Extremely Unstable -200Ft-33Ft Delta-T (F)Winds Measured at- 33 Feet Wind Speed (in mph)Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 1 0 0 1 NNE 0 0 0 0 0 0 0.NE 0 0 3 0 0 0. 3 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 0 0 0 SSW 0 0 3 3 0 0 6 SW 0 0 7 2 0 0 9 WSW 0 1 0 3 0 0 4 W 0 0 3 6 0 0 9 WNW 0 0 3 8 0 0 11 NW 0 0 1 2 0 0 3 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 1 20 26 0 0 47 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: 0 176 of 203 LaSalle Nuclear Station Period of Record: July -September 2005 Stability Class -Moderately Unstable -200Ft-33Ft Delta-T (F)Winds Measured at 33 Feet Wind Direction N NNE NE ENE E, ESE SE SSE S SSW SW WSW W WNW NW NNW Variable Wind Speed (in mph)1-3 4-7 8-12 13-18 19-24 > 24 Total 3 3 1 3 1 2 0 2 3 14 9 5 4 10 5 0 0 5 7 2 3 1 2 1 2 4 15 19 7 7 15 6 3 0 Total 0 10 65 22 2 0 99 Hours of calm in Hours of missing this stability class: wind measurements in this 0 stability class: 0 all stability classes: Hours of missing stability measurements in 0 177 of 203 LaSalle Nuclear Station Period of Record: July -September 2005 Stability Class -Slightly Unstable Winds Measured at, Wind Speed Wind-200Ft-33Ft Delta-T (F)33 Feet (in mph)Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 4-7 9 9 2 2 4 3 6 3 0 2 5 8 11 7 1 2 0 8-12 13-18 19-24 > 24 6 0 0 0 2 0 0 0 4 1 0 0.9 0 0 0 5 1 0 0 6 1 0 0 4 0 0 0 5 0 0 0 5 0 0 0 12 5 0 0 6 3 0 0 7 6 0 0 4 1 0 0 6 3 0 0 11 0 0 0 7 3 0 0 0 0 0 0 Total 15 11, 7 11 10 10 10 8 5 19 14 21 16 16 12 12 0 Total 0 74 99 24 0 0 197 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: 0 178 of 203 p.

LaSalle Nuclear Station Period of Record: July -September 2005 Stability Class -Neutral -200Ft-33Ft Delta-T (F)Winds Measured at 33 Feet Wind Speed (in mph)Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 4 48 24 2 0 0 78 NNE 2 31 32 0 0 0 65 NE 21 28 11 0 0 61 ENE 1 11 16 11 0 0 39 E, 1 21 16 2 0 0 40 ESE 2 14 17 1 0 0 34 SE 3 24 10 0 0 0 37 SSE 6 17 14 1 0 0 38 S 5 11 17 4 0 0 37 SSW 2 10 16 5 0 0 33 SW 3 6 9 12 0 0 30 WSW 2 il 7 4 0 0 24 W 1 7 7 1 0 0 16 WNW 4 15 9 4 0 0 32 NW 1 10 23 2 1 0 37 NNW 0 17 29 7 3 0 56 Variable 0 0 0 0 0 0 0 Total 38 274 274 67 4 0 657 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: 0 179 of 203 LaSalle Nuclear Station Period of Record: July -September 2005 Stability Class -Slightly Stable Winds Measured at, Wind Speed-200Ft-33Ft 33 Feet (in mph)Delta-T (F)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 4-7 45 51 8 8 20 12 10 12 8 9 8 8 11 10 7 14 0 8-12 13-18 19-24 > 24 Total 6 0 0 0 53 6 1 0 0 59, 18 1 0 0. 27 29 2 0 0 39 19 0 0 0 39 7 0 0 0 22 8 1 0 0 20 11 0 0 0 25 18 2 0 0 31 27 1 0 0 39 21 4 0 0 33 9 2 0 0 21 8 0 0 0 20 7 0 0 0 20 8 0 0 0 16 6 0 0 0 20 0 0 0 0 0 Total 21 241 208 14 0 0 484 Hours of calm in this stability class: Hours of missing wind measurements in this Hours of missing stability measurements in 0 stability class: all stability cl 0 asses: 0 180 of 203 9; LaSalle Nuclear Station Period of Record: July -September 2005 Stability Class -Moderately Stable -200Ft-33Ft Delta-T (F)Winds Measured at 33 Feet Wind Speed (in mph)Wind Direction N NNE NE, ENE E, ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 4-7 2 0 1 2 0 3 0 4 4 0 0 1 0 3 1 2 0 24 15 2 1 38 26 19 16 15 12 6 9 12 14 6 7 0 8-12 13-18 19-24 > 24 0 0 0 0 0 0 0 0 0 0 0 0 2 0 0 0 17 0 0 0 2 0 0 0 1 0 0 0 8 0 0 0 17 0 0 0 15 1 0 0 4 1 0 0 2 1 0 0 6 0 0 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Total 26 15 3 5 55 31 20 28 36 28 11 13 18 19 7 9 0 Total 23 222 76 3 0 0 324 Hours of.calm in this stability class: Hours of missing Hours of missing wind measurements in this stability measurements in 0 stability class: 0 all stability classes: 0 181 of 203 LaSalle Nuclear Station Period of Record: July -Stability Class -Extremely Stable Winds Measured at, September 2005-200Ft-33Ft 33 Feet Delta-T (F)Wind Speed (in mph)Wind Direction N NNE 1-3 0 0 4-7 8-12 13-18 19-24 > 24 Total 7 0 0 0 0 0 0 0 0 0 0 0 0 0 7 0.0 0 NE ENE E ESE SE SSE S SSW SW WSW 0 0 0 0 0 0 11 0 35 1 33 3 51 0 3 1 2 7 0 0 0 0 0 0 0 0 0 0 2 57 11 0 38 10 1 22 20 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 14 0 36 0 36 0 61 0 70 0 48 0 43 0 22 0 18 0 17 2 9 11 W 1 13 1 16 4 WNW NW NNW Variable 0 0 0 0 0 0 0 4 4 0 0 0 0 0 0 0 0 0 4 4 0 Total 11 300 69 0 380 Hours of calm in Hours of missing Hours of missing this stability class: wind measurements in this stability measurements in 0 stability class: 0 all stability classes: 0 4 182 of 203 LaSalle Nuclear Station Period of Record: July -September 2005 Stability Class -Extremely Unstable -375Ft-33Ft Delta-T (F)Winds Measured at 375 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E, ESE SE SSE S SSW SW WSW W WNW NW NNW Variable Total 1-3 4-7 0 0 ,0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0*0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 8-12 13-18 19-24 > 24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Total 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 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: 0 183 of 203 LaSalle Nuclear Station Period of Record: July -September 2005 Stability Class -Moderately Unstable -375Ft-33Ft Delta-T (F)Winds Measured at 375 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable Total 1-3 4-7 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 8-12 13-18 19-24 > 24 0 0 0 0 0 0 0 0 0 0 0 0.0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 2 1 0 0 0 0 0 0 1 1 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Total 0 0.0 0 0 0 0 0 0 1 3 0 2 1 0 0 0 7 0 4 3 0 Hours of calm in this stability class: Hours of missing wind measurements in this Hours of missing stability measurements in 0 stability class: 0 all stability classes: 0 184 of 203 ti LaSalle Nuclear Station Period of Record: July -September 2005 Stability Class -Slightly Unstable -375Ft-33Ft Delta-T (F)Winds Measured at 375 Feet Wind Speed (in mph)Wind Direction N NNE NýE ENE E.ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 4-7 0 0.0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 8-12 13-18 19-24 > 24 0 0 1 0 1 3 0 0 0 1 1 0 0 1 0 0 1 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 3 5 0 0 2 2 2 2 0 3 0 0 1 0 2 0 2 4 1 0 0 4 0 0 0 1 1 0 0 0 0 0 Total 1 4 2 1 3 0 0 0 1 8 8 3 4 7 4 2 0 Total 0 1 10 27 8 2 48 Hours of. calm in this stability class: Hours of missing wind measurements in this Hours of missingstability measurements in 0 stability class: 0 all stability classes: 0 185 of 203 LaSalle Nuclear Station Period of Record: July -September 2005 Stability Class -Neutral-375Ft-33Ft Delta-T (F)Winds Measured at 375 Feet Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 Wind Speed (in mph)4-7 8-12 13-18 19-24 > 24 Total 31 38 15 4 1 90 20 21 30 5 1 78.13 11 28 21 3. 78 20 21 17 11 0 71 13 17 4 5 0 39 12 16 13 0 0 41 16 23 5 1 0 45 16 15 12 1 0 46 9 16 20 6 0 55 5 17 29 15 3 71 10 15 12 13 2 52 16 18 4 12 0 50 14 11 9 2 0 38 13 20 16 5 1 55 7 33 32 4 6 84 16 23 17 1 0 57 0 0 0 0 0 0 Total 18 231 315 263 106 17 950 3.Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: Hours of missing stability measurements in all stability classes: 0 186 of 203 LaSalle Nuclear Station Period of Record: July -September 2005 Stability Class -Slightly Stable -375Ft-33Ft Winds Measured at 375 Feet Delta-T (F)Wind Speed (in mph)Wind Direction 1-3 4-7 8-12 13-18 4 13 20 4 17 31 19-24 > 24 Total N NNE 1 1 P 4 6 2 14 28 13 ENE ES, ESE SE SSE 0 0 0 1 24 30 4 21 25 5 8 3 0 42 0 59 0 57 0 60 0 58 0 27 0 32 1 23 9 45 4 11 9 0 10 9 9 4 4 1 S SSW.SW WSW 3 0 1 0 0 0 0 4 6 4 0 0 7 7 3 2 11 6 14 7 9 28 55 6 12 16 38 8 10 W 2 11 WNW NW 2 1 5 0 7 8 9 8 7 8 1 4 6 4 0 2 28 0 23 0 21 0 22 0 28 NNW Variable 1 0 8 10 0 0 0 0 Total 8 53 170 this stability class: wind measurements in this stability measurements in 226 105 56 618 Hours of Hours of Hours of calm in missing missing 0 stability class: 0 all stability classes: 0 187 of 203 LaSalle Nuclear Station Period of Record: July -September 2005 Stability Class -Moderately Stable -375Ft-33Ft Winds Measured at 375 Feet Delta-T (F)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable Wind Speed (in mph)1-3 4-7 8-12 13-18 19-24 > 24 Total 1 2 7 1 6 19 10 18 20 6 4 5 12 8 8 1 0 1 0 0 0 11 18 7 2 12 9 1 6 2 4 6 3 0 0 0 0 0 0 5 2 3 17 19 3 1 0 0 0 0 0 10 8.16 7 19 53 24 35 66 47 14 14 16 18 19 6 0 Total 7 39 66 128 82 50 372 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: 0 188 of 203 4, LaSalle Nuclear Station Period of Record: July -September 2005 Stability Class -Extremely Stable -375Ft-33Ft Winds Measured at 375 Feet Delta-T (F)Wind Speed (in mph)Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 NNE 0 NF ,0 ENE 0 E, 0 ESE 0 SE 0 SSE 0 S 0 SSW 0 SW 0 WSW 0 W 0 WNW 0 NW 0 NNW 0 Variable 0 5 0 0 0 0 3 8 19 12 11 16 2 3 2 6 0 0 1 0 0 0 0 3 6 3 20 17 12 9 1 0 1 2 0 0 0 0 0 0 0 0 3 10 6 5 0 5 2 0 0 0 7 0 0 0 0 6 14 25 43 39 37 15 11 4 7 2 0 Total 0 3 14 87 75 31 210 Hours of calm in this stability class: Hours of missing wind measurements in this Hours of missing stability measurements in 0 stability class: 0 all stability classes: 0 189 of 203 LaSalle Nuclear Station Period of Record: October -December2005 Stability Class -Extremely Unstable -200Ft-33Ft Delta-T (F)Winds Measured atý33 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 4-7 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 8-12 13-18 19-24 > 24 0 0 0 0 0 0 0 0 0 1 0 0.0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 2 0 0 0 0 0 0 0 1 0 0 0 0 0 0 Total 0 0.1 0 0 0 0 0 0 0 1 0 0 2 0 1 0 Total 0 0 0 5 0 0 5 Hours of calm in this stability class: Hours of missing wind measurements in this Hours of missing stability measurements in 0 stability class: 0 all stability classes: 0 190 of 203 ,.

LaSalle Nuclear Station Period of Record: October -December2005 Stability Class -Moderately Unstable -200Ft-33Ft Delta-T (F)Winds Measured at 33 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 4-7 0 1 0 0 0 0 0 1 1 0 0 0 0 0 0 0 8-12 13-18 19-24 > 24 2 1 0 0 1 1 0 0 1 2 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 2 0 1 0 0 0 3 2 0 0 1 9 1 0 1 1 2 0 1 1 0 0 0 2 0 0 0 1 0 0 0 1 0 0 0 0 0 0 Total 4 2 4 1 0 1 0 2 2 6 11 4 2 2 1 1 0 Total 0 4 13 21 5 0 43 0 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: Hours of missing stability measurements in all stability classes: 0 191 of 203 LaSalle Nuclear Station Period of Record: October-,December2005 Stability Class -Slightly Unstable -200Ft-33Ft Delta-T (F)Winds Measured at- 33 Feet Wind Speed (in mph)Wind Direction 1-3 4-7 N 0 2 NNE 0 0 NE 0 0 ENE 0 0 E 0 0 ESE 0 1 SE 0 0 SSE 0 0 S 0 0 SSW 0 0 SW 0 0 WSW 0 0 W 0 0 WNW 0 1 NW 0 0 NNW 0 1 Variable 0 0 8-12 13-18 19-24 > 24 3 1 0 0 2 0 0 0 2 3 0 0.6 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 0 1 1 0 0 3 7 1 0 2 7 5 0 5 2 1 0 5 5 0 0 2 2 0 0 1 3 0 0 8 16 0 0 0 0 0 0 Total 6 2.5 8 0 1 0 2 2 11 14 8 10 5 4 25 0 Total 0 5 40 49 9 0 103 Hours of calm in this stability class: Hours of missing wind measurements in this Hours of missing stability measurements in 0 stability class: 0 all stability classes: 0 192 of 203 LaSalle Nuclear Station Period of Record: October Stability Class -Neutral Winds Measured at Wind Speed Wind-December2005

-200Ft-33Ft Delta-T (F)33 Feet (in mph)Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 4-7 1 0 ,1 0 0 0 4 0 0 3 1 1 0 3 0 1 0 16 12 4 2 5 6 4 1 1 2 6 4 16 16 7 10 0 8-12 13-18 19-24 > 24 25 26 1 0 16 1 0 0 20 1 0 0 22 22 6 0 17 33 1 0 8 4 0 0 9 10 8 0 3 3 1 0 13 9 0 0 15 21 9 0 24 14 14 0 25 12 1 3 35 30 12 13 31 30 7 8 40 20 10 1 30 29 7 6 0 0 0 0 Total 69 29 26 52 56 18 35 8 23 50 59 46 106 95 78 83 0 Total 15 112 333 265 0 77 31 833 Hours of calm in this stability class: Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 193 of 203 LaSalle Nuclear Station Period of Record: October -December2005 Stability Class -Slightly Stable Winds Measured at-Wind Speed Wind-200Ft-33Ft Delta-T (F)33 Feet (in mph)Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 4-7 1 2 2 0 1 1 2 1 2 1 2 1 0 0 1 0 0 11 22 9 1 13 7 8 2 5 4 7 4 12 12 11 7 0 8-12 13-18 19-24 > 24 10 7 0 0 4 0 0 0 12 0 0 0.7 3 0 0 15 8 0 0 2 4 0 0 5 6 8 0 12 12 0 0 17 10 1 3 23 18 12 2 15 26 15 2 14 8 3 0 21 13 8 4 30 10 18 16 28 9 1 1 10 6 0 0 0 0 0 0 Total 29 28.23 II 37 14 29 27 38 60 67 30 58 86 51 23 0 Total 17 135 225 140 66 28 611 Hours of calm in this stability class: 0 Hours of missing Hours of missing wind measurements in this stability class: 0 stability measurements in all stability classes: 0 194 of 203 LaSalle Nuclear Station Period of Record: October -December2005 Stability Class -Moderately Stable -200Ft-33Ft Delta-T (F)Winds Measured at 33 Feet Wind Speed (in mph)Wind Direction 1-3 4-7 N 2 NNE 1 NF .0 ENE 0 E 3 ESE 0 SE 1 SSE 0 S 0 SSW 0 SW 2 WSW 1 W 1 WNW 0 NW 0 NNW 0 Variable 0 12 8 1 0 3 6 7 1 12 3 4 6 17 20 15 7 0 8-12 13-18 19-24 > 24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 5 0 0 0 8 0 0 0 5 0 0 0 6 9 0 0 23 15 1 0 13 15 0 0 14 2 0 0 24 0 0 0 13 0 0 0 10 0 0 0 2 0 0 0 0 0 0 0 Total 14 9 1 0 7 11 16 6 27 42 34 23 42 33 25 9 0 Total 11 122 124 41 1 0 299 Hours of.calm in this stability class: Hours of missing wind measurements in this Hours of missing stability measurements in 0 stability class: 0 all stability classes: 0 195 of 203 LaSalle Nuclear Station Period of Record: October -.December2005 Stability Class -Extremely Stable Winds Measured atýWind Speed Wind-200Ft-33Ft Delta-T (F)33 Feet (in mph)Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 4-7 8-12 13-18 19-24 > 24 2 0 0 0 0 1 0 0 0 0 0 0 0 0 0.0 0 0 0 0 3 0 0 0 0 1 0 0 0 0 7 3 0 0 0 17 4 0 0 0 27 13 0 0 0 9 51 2 0 0 12 27 0 0 0 3 27 1 0 0 10 14 0 0 0 7 3 0 0 0 8 5 0 0 0 1 0 0 0 0 0 0 0 0 0 Total 2 1.0 0 4 1 10 22 40 64 39 31 24 10 13 1 0 Total 4 108 147 3 0 0 262 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: 0 196 of 203 LaSalle Nuclear Station Period of Record: October -December2005 Stability Class -Extremely Unstable -375Ft-33Ft Winds Measured at 375 Feet Delta-T (F)Wind Speed (in mph)Wind Direction N NNE NF ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable Total 1-3 4-7 8-12 13-18 19-24 > 24 Total 0 0 ,0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0----- ----- ----- -----0 0 Hours of calm in this stability class: Hours of missing wind measurements in this Hours of missing stability measurements in 0 stability class: 0 all stability classes: 1 197 of 203 LaSalle Nuclear Station Period of Record: October -,December2005 Stability Class -Moderately Unstable -375Ft-33Ft Delta-T (F)Winds Measured at 375 Feet Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable Total 1-3 4-7 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 8-12 13-18 19-24 > 24 0 0 0 0 0 0 0 0 0 0 0 0.0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Total 0 0.0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Hours of calm in this stability class: Hours of missing wind measurements in this Hours of missing stability measurements in 0 stability class: 0 all stability classes: 1 198 of 203 LaSalle Nuclear Station Period of Record: October -December2005 Stability Class -Slightly Unstable -375Ft-33Ft Winds Measured at 375 Feet Delta-T (F)Wind Speed (in mph)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable Total 1-3 4-7 8-12 13-18 19-24 > 24 Total 0 0 0 0 0 0 0 0 0 0 0 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: 1 199 of 203 LaSalle Nuclear Station Period of Record: October -,December2005 Stability Class -Neutral -375Ft-33Ft Winds Measured at, 375 Feet Delta-T (F)Wind Direction N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW Variable 1-3 Wind Speed (in mph)4-7 8-12 13-18 19-24 > 24 Total 11 8 19 31 7 76 3 3 18 3 0 28.2 16 29 8 0. 56 1 8 26 21 10 66 1 6 13 22 0 43 5 4 9 0 0 18 4 2 5 7 20 39 0 1 3 2 8 14 1 7 10 14 3 37 3 7 27 27 18 83 2 9 24 10 34 79 3 19 14 6 25 70 10 24 26 28 34 122 8 17 34 19 17 97 5 20 40 21 18 104 6 10 23 43 16 99 0 0 0 0 0 0 Total 13 65 161 Hours of calm in this stability class: Hours of missing wind measurements in this Hours of missing stability measurements in 320 262 210 1031 0 stability class: 3 all stability classes: 1 200 of 203 9, LaSalle Nuclear Station Period of Record: October -December2005 Stability Class -Slightly Stable -375Ft-33Ft Delta-T (F)Winds Measured at 375 Feet Wind Speed (in mph)Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 6 1 8 5 1 23 NNE 0 5 8 5 1 0 19 NF 1 4 21 6 7 0 39 ENE 0 4 9 10 1 0 24 E. 0 4 2 13 4 0 23 ESE 1 6 5 4 1 0 17 SE 0 2 3 8 4 10 27 SSE 2 0 3 5 10 14 34 S 0 2 0 1 9 21 33 SSW 0 2 4 7 12 56 81 SW 0 3 3 8 18 38 70 WSW 0 3 5 12 9 9 38 W 0 3 9 10 17 33 72 WNW 1 4 14 34 30 43 126 NW 0 3 8 14 28 8 61 NNW 0 4 5 1 6 7 23 Variable 0 0 0 0 0 0 0 Total 7 55 100 146 162 240 710 Hours of.calm in this stability class: 0 Hours of missing wind measurements in this stability class: 1 Hours of missing stability measurements in all stability classes: 1 201 of 203 LaSalle Nuclear Station Period of Record: October -,December2005 Stability Class -Moderately Stable -375Ft-33Ft Winds Measured at 375 Feet Delta-T (F)Wind Speed (in mph)Wind Direction N 1-3 0 4-7 8-12 13-18 19-24 > 24 Total 3 0 7 1 3 0 NNE NE ENE E ESE SE SSE S SSW SW WSW 7 4 0 2 1 3 1 0 2 0 0 1 3 4 0 11.0 0 0 0 0 1 9 6 7 3 7 8 3 11 9 29 3 18 55 78 8 6 17 33 W WNW NW NNW Variable Total 0 0 0 1 0 0 0 1 2 0 0 0 4 13 4 17 3 10 7 10 39 3 3 23 3 3 0 9 6 0 3 5 3 0 1 19 6 24 4 16 0 106 0 319 3 21 33 87 69 Hours of calm in Hours of missing Hours of missing this stability class: wind measurements in this stability measurements in 0 stability class: 0 all stability classes: 1 202 of 203 t, LaSalle Nuclear Station Period of Record: October -December2005 Stability Class -Extremely Stable -375Ft-33Ft Winds Measured at 375 Feet Delta-T (F)Wind Speed (in mph)Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N NNE NE ENE E.ESE SE SSE S SSW SW WSW W WNW NW NNW Variable Total.0 0 0 0 0 0 0 7 12 8 1 6 1 2 0 0 0 0 0 0 0 0 1 20 9 3 10 7 1 0 0 0 2 0 0 0 0 0 3 16 31 26 19 20 16 3 3 0 0 1 17 20 39 62 139 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: 1 203 of 205