Text

Annual Radiological Environmental Operating Report
	ML081420473
Person / Time
Site:	LaSalle
Issue date:	05/15/2008
From:	Enright D; Exelon Generation Co, Exelon Nuclear
To:	; Document Control Desk, Office of Nuclear Reactor Regulation
References
	FOIA/PA-2010-0209, RA08-034
	Download: ML081420473 (190)
	v • d • e

Exelkn.

Exelon Generation Company, LLC www.exeloncorp.com Nuclear LaSalle County Station 2601 North 21' Road Marseilles, IL 61341-9757 RA08-034 10 CFR 50 Appendix I May 15, 2008 U. S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, D.C. 20555 LaSalle County Station, Units 1 and 2 Facility Operating License Nos. NPF-11 and NPF-18 NRC Docket Nos. 50-373 and 50-374

Subject:

2007 Annual Radiological Environmental Operating Report Enclosed is the Exelon Generation Company, LLC, LaSalle County Station 2007 Annual Radiological Environmental Operating Report, submitted in accordance with Technical Specification 5.6.2, "Annual Radiological Environmental Operating Report." This report contains the results of the Radiological Environmental and Meteorological Monitoring Programs. This report is enclosed as an Attachment.

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

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

,:Respectfully, Daniel J. Enright 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 2007 Prepared By Teledyne Brown Engineering Environmental Services Nuclear LaSalle County Station Marseilles, IL 61341 May 2008 1 of 189

Intentionally left blank 2 of 189

Table Of Contents

1. Summary and Conclusions....................................................................

1

11. Introduction.....................................................................................

2 A. Objectives of the REMP...............................................................

2 B. Implementation of the Objectives..................................................... 2 111. Program Description...........................................................................

2 A. Sample Collection......................................................................

2 B. Sample Analysis.......................................................................

4 C. Data Interpretation.....................................................................

5 D. Program Exceptions...................................................................

6 E. Program Changes.....................................................................

8 IV. Results and Discussion.......................................................................

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

8

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

8

2. Ground/well Water.............................................................

9

3. Fish............................................................................

10

4. Sediment......................................................................

10 B. Atmospheric Environment....................I........................................

11

1. Airborne.......................................................................

11

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

11

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

12

2. Terrestrial......................................................................

12

a. Milk....................................................................

12

b. Food Products......................................................... 12 C. Ambient Gamma Radiation..........................................................

13 D. Land Use Survey.....................................................................

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

14 3 of 189

Appendices Appendix A Radiological Environmental Monitoring Report Summary Tables Table A-i Appendix B Tables Table B-i:

Table B-2:

Radiological Environmental Monitoring Program Summary for the LaSalle County Station, 2007 Location Designation, Distance & Direction, and Sample Collection &

Analytical Methods Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, LaSalle County Station, 2007 Radiological Environmental Monitoring Program - Summary of Sample Collection and Analytical Methods, LaSalle County Station, 2007 F*Uure--

Figure B-i:

Figure B-2:

Figure B-3:

Figure B-4:

Appendix C Tables Table C-1.1 Table C-1.2 Table C-1.3 Table C-11.1 Inner Ring TLD Locations of the LaSalle County Station, 2007 Outer Ring TLD Locations of the LaSalle County Station, 2007 Fixed Air Sampling Locations of the LaSalle County Station, 2007 Ingestion and Waterborne Exposure Pathway Sample Locations of the LaSalle County Station, 2007 Data Tables and Figures - Primary Laboratory Concentrations of Gross Beta in Surface Water Samples Collected in the Vicinity of LaSalle County Station, 2007.

Concentrations of Tritium in Surface Water Samples Collected in the Vicinity of LaSalle County Station, 2007.

Concentrations of Gamma Emitters in Surface Water Samples Collected in the Vicinity of LaSalle County Station, 2007.

Concentrations of Tritium in Ground/well Water Samples Collected in the Vicinity of LaSalle County Station, 2007 ii 4 of 189

Table C-1I.2 Table C-I11.1 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-VIII.1 Table C-IX.1 Table C-IX.2 Table C-IX.3 Concentrations of Gamma Emitters in Ground/well Water Samples Collected in the Vicinity of LaSalle County Station, 2007.

Concentrations of Gamma Emitters in Fish Samples Collected in the Vicinity of LaSalle County Station, 2007.

Concentrations of Gamma Emitters in Sediment Samples Collected in the Vicinity of LaSalle County Station, 2007.

Concentrations of Gross Beta in Air Particulate Samples Collected in the Vicinity of LaSalle County Station, 2007.

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, 2007.

Concentrations of Gamma Emitters in Air Particulate Samples Collected in the Vicinity of LaSalle County Station, 2007.

Concentrations of 1-131 in Air Iodine Samples Collected in the Vicinity of LaSalle County Station, 2007.

Concentrations of 1-131 in Milk Samples Collected in the Vicinity of LaSalle County Station, 2007.

Concentrations of Gamma Emitters in Milk Samples Collected in the Vicinity of LaSalle County Station, 2007.

Concentrations of Gamma Emitters in Vegetation Samples Collected in the Vicinity of LaSalle County Station, 2007.

Quarterly TLD Results for LaSalle County Station, 2007.

Mean Quarterly TLD Results for the Inner Ring, Outer Ring, Other and Control Locations for LaSalle County Station, 2007.

Summary of the Ambient Dosimetry Program for LaSalle County Station, 2007.

Figures Figure C-1 Figure C-2 Figure C-3 Figure C-4 Figure C-5 Surface Water - Gross Beta - Stations L-21 (C) and L-40 Collected in the Vicinity of LCS, 2000 - 2007.

Surface Water - Tritium - Stations L-21 (C) and L-40 Collected in the Vicinity of LCS, 2000 - 2007.

Air Particulate - Gross Beta - Stations L-01 and L-03 Collected in the Vicinity of LCS, 2000 - 2007.

Air Particulate - Gross Beta - Stations L-05 and L-06 Collected in the Vicinity of LCS, 2000 - 2007.

Air Particulate - Gross Beta - Station L-10 (C) Collected in the Vicinity of LCS, 2000 - 2007.

iii 5 of 189

Figure C-6 Figure C-7 Appendix D Air Particulate - Gross Beta - Station L-04 and L-07 Collected in the Vicinity of LCS, 2007.

Air Particulate - Gross Beta - Station L-08 and L-1 1 Collected in the Vicinity of LCS, 2007.

Inter-Laboratory Comparison Program Tables Table D-1 Table D-2 Table D-3 Table D-4 Table D-5 Appendix E Appendix F Appendix G Analytics Environmental Radioactivity Cross Check Program Teledyne Brown Engineering, 2007 ERA Environmental Radioactivity Cross Check Program Teledyne Brown Engineering, 2007 DOE's Mixed Analyte Performance Evaluation Program (MAPEP)

Teledyne Brown Engineering, 2007 ERA Statistical Summary Proficiency Testing Program Environmental, Inc., 2007 DOE's Mixed Analyte Performance Evaluation Program (MAPEP)

Environmental, Inc., 2007 Effluent Data Meteorological Data Annual Radiological Groundwater Protection Program Report (ARGPPR) iv 6 of 189

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 2007 through 31 December 2007. During that time period, 1,545 analyses were performed on 1,352 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-i 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.

7 of 189

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 2007 through 31 December 2007.

A.

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

1.

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

2.

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

B.

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

1.

Identifying significant exposure pathways.

2.

Establishing baseline radiological data of media within those pathways.

3.

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

Ill.

Program Description A.

Sample Collection Samples for the LCS REMP were collected for Exelon Nuclear by 8 of 189

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 2007. Sample locations and descriptions can be found in Tables B-1 and B-2, and Figures B-1 through B-4, Appendix B.

Aquatic Environment The aquatic environment was evaluated by performing radiological analyses on samples of surface water, ground/well water, fish, and sediment. Two gallon water samples were collected weekly from two surface water locations (L-21 and L-40) and composited for monthly and quarterly required analyses. Control location was L-21. Two ground/well water locations (L-27 and L-28) were also grab sampled quarterly. All samples were collected in new unused plastic bottles, which were rinsed with source water prior to collection. Fish samples comprising the flesh of bluegill, channel catfish, 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 three locations semiannually, L-21 (Control), L-40 and L-41.

Atmospheric Environment The atmospheric environment was evaluated by performing radiological analyses on samples of 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 air filters and air iodine samples were replaced weekly and sent to the laboratory 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 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. 9 of 189

Ambient Gamma Radiation Direct radiation measurements were made using CaF2 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 ruing consisting of 16 locations (L-1 01, L-1 02, L-1 03, L-1 04, 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 outeruing consisting of 16 locations (L-201, L-202, L-203, L-204, L-205, L-206, L-207, L-208, L-209, L-210, L-211, L-212, L-213, L-214, L-215 and L-216) extending to approximately 5 miles from the site designed to measure possible exposures to 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 CaF2 thermoluminescent phosphors enclosed in plastic - were placed at each location approximately six feet above ground level. The TLDs were exchanged quarterly and sent to Global Dosimetry for analysis.)

B.

Sample Analysis This section describes the general analytical methodologies used by TBE 10 of 189

and Environmental Inc (Midwest Labs) to analyze the environmental samples for radioactivity for the LCS REMP in 2007. 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 with the exception that the measurement is an after the fact estimate of the presence of activity. 11I of 189

2.

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

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

For surface water and food product 12 nuclides, Mn-54, Co-58, Fe-59, Co-60, Zn-65, Zr-95, Nb-95, 1-131, Cs-134, Cs-137, Ba-140, and La-140 were reported.

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

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

D.

Program Exceptions For 2007 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 A/I L-08 01/18/07 No apparent reason for low timer reading of 162.1 hours1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months .

A/I L-10 02/23/07 No readings; pump did not start when electricity was turned back on. Pump running when collector left location.

A/I L-01 04/05/07 No electricity; station Point of Contact notified.

A/I L-01 04/12/07 Low timer reading of 136.8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months due to recent power restoration. 12 of 189

Table D-1 LISTING OF SAMPLE ANOMALIES (continued)

Sample Location Collection Reason Type Code Date A/I A/I A/I A/I A/I A/I A/I A/I L-05 L-07 L-1 1 L-05 L-06 L-06 L-08 L-07 07/19/07 Low reading of 135.1 hours1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months due to power outage.

07/19/07 Low reading of 137.8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months due to power outage.

07/19/07 No apparent reason for low reading of 140.0 hours0 days 0 hours 0 weeks 0 months ; possibly due to storms in area.

07/26/07 Low reading of 163.0 hours0 days 0 hours 0 weeks 0 months due to power outage/restoration.

08/08/07 Low reading of 75.7 hours8.101852e-5 days 0.00194 hours 1.157407e-5 weeks 2.6635e-6 months possibly due to storms in area.

08/15/07 Low reading of 13.2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months due to blown fuse; collector replaced fuse.

08/15/07 Low reading of 163.9 possibly due to storms in area.

09/13/07 Low reading of 91.6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months due to recent power restoration.

Table D-2 LISTING OF MISSED SAMPLES Sample Location Collection Reason Type Code Date All A/I AMl A/I AlI L-10 L-07 L-07 L-07 02/15/07 07/26/07 08/02/07 08/08/07 No electricity; ComEd working on line.

No sample due to power outage; problem traced to substation.

No sample; power out.

No sample; run time of 1.3 hours3.472222e-5 days 8.333333e-4 hours 4.960317e-6 weeks 1.1415e-6 months not enough for viable sample; power out. 13 of 189

Table D-2 LISTING OF MISSED SAMPLES (continued)

Sample Location Collection Reason Type Code Date A/I L-07 08/15/07 No sample; power out; unable to field check pump.

Al L-07 08/23/07 No sample; power out.

A/I L-07 08/30/07 No sample; power out.

A/l L-07 09/06/07 No sample; power out.

TLD L-215-4 12/27/07 4 th quarter TLD found missing during exchange; new utility pole erected.

Collector placed new 1st quarter TLD.

Each program exception was reviewed to understand the causes of the program exception. Occasional equipment breakdowns and power outages were unavoidable. The power outage associated with A/I sample location L-07 was due to a failed transformer, resulting in extensive efforts and the associated delay to restore power to L-07. Restoration efforts included a modification to provide a more reliable power supply from an overhead line.

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

E.

Program Changes Starting in 2007, the mean and two standard deviation values are calculated using the positive values only.

Sediment location L-21 was added as an upstream control location in the middle of 2007.

IV.

Results and Discussion A.

Aquatic Environment

1.

Surface Water Samples were taken weekly and composited monthly at two 14 of 189

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.

Samples from all locations were analyzed for concentrations of gross beta (Table C-1.1, Appendix C). The values ranged from 4.4 to 11.9 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). Tritium was detected in one sample with a concentration of 456 pCi/I. The affected sample location was L-21, the Station's Illinois River upstream control location, and not related to plant operation. 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:

TrhtiUn Quarterly grab samples from the locations were analyzed for tritium activity (Table C-11.1, Appendix C). No tritium was detected and the 2000 pCi/L OCDM and contractually required 200 pCi/L LLDs were met. 15 of 189

Gamma Spectrometry Samples from all locations were analyzed for gamma emitting nuclides (Table C-I1.2, Appendix C). No nuclides were detected, and all required LLDs were met.

3.

Fish Fish samples comprised bluegill, channel catfish, 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:

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 2,170 to 3,530 pCi/kg wet. No fission or activation products were found.

4.

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

Gamma Spectrometry Sediment samples from both locations were analyzed for gamma emitting nuclides (Table C-IV.1, Appendix C). Nuclides detected were naturally occurring K-40 and Cs-1 37.

Potassium-40 was found at all stations and ranged from 9,850 to 13,300 pCi/kg dry. Cs-137 was found in one sample at a concentration of 26 pCi/kg dry. The activity detected was consistent with those detected in previous years and is likely due to fallout from above-ground nuclear weapons testing. No LaSalle fission or activation products were found. 16 of 189

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). The following analyses were performed:

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 10 to 42 E-3 pCi/m 3 with a mean of 21 E-3 pCi/m 3.

The results from the near site location (Group II) ranged from 9 to 47 E-3 pCi/m 3 with a mean of 22 E-3 pCi/m 3. The results from the far field locations (Group III) ranged from 10 to 46 E-3 pCi/m 3 with a mean of 22 E-3 pCi/m 3. The results from the Control location (Group IV) ranged from 10 to 44 E-3 pCi/m3 with a mean of 22 E-3 pCi/m 3. Comparison of the 2007 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 2007 indicate no notable differences among the three groups.

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

Naturally occurring Be-7 due to cosmic ray activity was detected in all samples. These values ranged from 97 to 336 E-3 pCi/m 3. Naturally occurring K-40 was detected in 17 of 189

five samples at concentrations of 12 to 23 E-3 pCi/m 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).

No nuclides were 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:

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 1,150 to 1,360 pCi/I. 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: 18 of 189

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.

Most TLD measurements were below 30 mR/standard month, with a range of 17 to 30 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 2007 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 in each of the sixteen 22 1/2 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. 19 of 189

Distance in Miles from the LCS Reactor Buildinqs 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 GSE 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 Performance Evaluation Program (MAPEP), were evaluated against the following pre-set acceptance criteria:

1.

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

2.

ERA Evaluation Criteria ERA's evaluation report provides an acceptance range for control and warning limits with associated flag values. ERA's acceptance limits are established per the USEPA, NELAC, state specific PT program requirements or ERA's SOP for the Generation of Performance Acceptance Limits, as applicable. The acceptance limits are either determined by a regression equation specific to each analyte or a fixed percentage limit promulgated under the appropriate regulatory document. 20 of 189

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, 17 out of 19 analytes met the specified acceptance criteria. Two samples did not meet the specified acceptance criteria for the following reasons:

1.

Teledyne Brown Engineering's Analytics March 2007 1-131 in charcoal result of 34.7 pCi was lower than the known value of 71.3, resulting in a found to known ratio of 0.49. A new technician counted the charcoal cartridge on the back rather than the face side. Due to decay of the 1-131, recounting could not be performed.

Counting the 2nd quarter Analytics charcoal cartridge on the face and the back resulted in approximately 220% more activity on the face of the cartridge. This indicates that we would have had acceptable results (ratio approximately 1.07) if the cartridge had been counted on the face side. The investigation was documented by Nonconformance Report NCR 07-02.

2.

Teledyne Brown Engineering's ERA July 2007 Cs-1 34 result of 57.6 pCi/L exceeded the lower acceptance limit of 60.2 pCi/L. The high activity of the sample resulted in the lower acceptance limit of 8.66, although the ratio of found to known was 83.6%, which is considered acceptable by TBE. The investigation was documented by Nonconformance Report NCR 07-07.

For the secondary laboratory, 18 out of 19 analytes met the specified acceptance criteria. One sample did not meet the specified acceptance criteria for the following reasons:

1. Environmental Inc.'s ERA March 2007 air particulate Cs-137 result of 345.3 pCi/L exceeded the upper control limit of 336 pCi/L. The reported result was calculated using composite filter geometry rather than the single filter geometry. The recalculated result of 21 of 189

305.8 pCi/filter fell within the acceptance limits. This was entered into their June 2007 Program Deviation Report.

The Inter-Laboratory Comparison Program provides evidence of "in control" counting systems and methods, and that the laboratories are producing accurate and reliable data. 22 of 189

APPENDIX A RADIOLOGICAL ENVIRONMENTAL MONITORING REPORT QUARTERLY AND ANNUAL

SUMMARY

23 of 189

TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE LASALLE COUNTY STATION, 2007 NAME OF FACILITY:

LASALLE DOCKET NUMBER:

50-373 & 50-374 LOCATION OF FACILIT' MARSEILLES IL REPORTING PERIOD:

ANNUAL 2007 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN(M)

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN(M)

MEAN(M)

STATION #

NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F)

(F)

NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT)

(LLD)

MEASUREMENTS SURFACE WATER (PCI/LITER)

GR-B 24 H-3 GAMMA MN-54 8

4 8

(12/12)

(4.7/11.3) 200

<LLD 15

<LLD 7.5 (12/12)

(4.4/11.9) 8 (12/12)

(4.7/11.3)

L-40 INDICATOR ILLINOIS RIVER - DOWNSTREAM 5.2 MILES NNW OF SITE 0

24 CO-58 FE-59 CO-60 ZN-65 NB-95 15

<LLD 30

<LLD 15

<LLD 30

<LLD 15

<LLD 456 (1/4)

(456)

<LLD

<LLD 0

0 0

0 456 (1/4)

(456)

L-21 CONTROL 0

ILLINOIS RIVER AT SENECA - UPSTREAM 4.0 MILES NE OF SITE 0

00 tO

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

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE LASALLE COUNTY STATION, 2007 NAME OF FACILITY:

LASALLE DOCKET NUMBER:

50-373 & 50-374 LOCATION OF FACILIT' MARSEILLES IL REPORTING PERIOD:

ANNUAL 2007 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN(M)

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN(M)

MEAN(M)

STATION #

NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F)

(F)

NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT)

(LLD)

MEASUREMENTS SURFACE WATER (PCI/LITER)

ZR-95 I

to 1-131 CS-134 CS-137 BA-140 LA-140 30

<LLD 15

<LLD 18

<LLD 60

<LLD 15

<LLD 200

<LLD

<LLD 0

0

<LLD 0

<LLD

<LLD 0

0 0

0 GROUND WATER (PCI/LITER)

H-3 10 10 NA GAMMA MN-54 15

<LLD NA 0

I'J 0

00 110

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

TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE LASALLE COUNTY STATION, 2007 NAME OF FACILITY:

LASALLE DOCKET NUMBER:

50-373 & 50-374 LOCATION OF FACILIT MARSEILLES IL REPORTING-PERIOD:

ANNUAL 2007 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN(M)

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN(M)

MEAN(M)

STATION #

NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F)

(F)

NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT)

(LLD)

MEASUREMENTS GROUND WATER (PCI/LITER)

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 NA NA NA NA NA NA NA NA 0

0 0

0' 00

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

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE LASALLE COUNTY STATION, 2007 NAME OF FACILITY:

LASALLE DOCKET NUMBER:

50-373 & 50-374 LOCATION OF FACILITI MARSEILLES IL REPORTING PERIOD:

ANNUAL 2007 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN(M)

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN(M)

MEAN(M)

STATION #

NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F)

(F)

NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT)

(LLD)

MEASUREMENTS GROUND WATER (PCI/LITER)

BA-140 LA-140 GAMMA MN-54 FISH (PCI/KG WET) 12 CO-58 FE-59 CO-60 ZN-65 NB-95 60

<LLD 15

<LLD 130

<LLD 260

<LLD 130

<LLD 260

<LLD NA

<LLD NA NA

<LLD

<LLD 0

0 0

00 11

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

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE LASALLE COUNTY STATION, 2007 NAME OF FACILITY:

LASALLE DOCKET NUMBER:

50-373 & 50-374 LOCATION OF FACILITI MARSEILLES IL REPORTING PERIOD:

ANNUAL 2007 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN(M)

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN(M)

MEAN(M)

STATION #

NUMBEROF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F)

(F)

NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT)

(LLD)

MEASUREMENTS I

FISH (PCI/KG WET)

SEDIMENT (PCI/KG DRY)

ZR-95 CS-134 CS-137 BA-140 LA-140 GAMMA MN-54 NA

<LLD 130

<LLD 150

<LLD NA

<LLD

<LLD 0

0 0

<LLD

<LLD 5

<LLD CO-58 FE-59 NA

<LLD

<LLD 0

0 0

NA

<LLD

<LLD 00 0

00 100

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

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE LASALLE COUNTY STATION, 2007 NAME OF FACILITY:

LASALLE DOCKET NUMBER:

50-373 & 50-374 LOCATION OF FACILIT' MARSEILLES IL REPORTING PERIOD:

ANNUAL 2007 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN(M)

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN(M)

MEAN(M)

STATION #

NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F)

(F)

NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT)

(LLD)

MEASUREMENTS SEDIMENT (PCI/KG DRY) 0!

CO-60 ZN-65 NB-95 ZR-95 CS-134 CS-137 BA-140 LA-140 NA

<LLD NA

<LLD 150

<LLD 180 26 (1/4)

(26)

NA

<LLD NA

<LLD

<LLD 0

0 0

<LLD

<LLD 26 (1/2)

(26)

L-40 INDICATOR ILLINOIS RIVER - DOWNSTREAM 5.2 MILES NNW OF SITE 0

0 0

00 100

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

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE LASALLE COUNTY STATION, 2007 NAME OF FACILITY:

LASALLE DOCKET NUMBER:

50-373 & 50-374 LOCATION OF FACILIT' MARSEILLES IL REPORTING PERIOD:

ANNUAL 2007 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN(M)

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN(M)

MEAN(M)

STATION #

NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F)

(F)

NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT)

(LLD)

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

GR-B 468 GAMMA MN-54 36 CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 10 22 (416/416)

(9/47)

NA

<LLD NA

<LLD 22 (52/52)

(10/44)

<LLD

<LLD 23 (53/53)

(14/38)

L-I I INDICATOR RANSOM 6.0 MILES S OF SITE 0

0 0

0

<LLD

<LLD 0

0 0

NA

<LLD

<LLD 0

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

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE LASALLE COUNTY STATION, 2007 NAME OF FACILITY:

LASALLE DOCKET NUMBER:

50-373 & 50-374 LOCATION OF FACILITI MARSEILLES IL REPORTING PERIOD:

ANNUAL 2007 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN(M)

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN(M)

MEAN(M)

STATION #

NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F)

(F)

NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT)

(LLD)

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

CS-134 CS-137 BA-140 LA-140 50

<LLD 60

<LLD NA

<LLD

<LLD 0

0 0

I 00

<LLD 0

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

MILK (PCI/LITER)

GAMMA 1-131 1-131 GAMMA MN-54 468 70

<LLD I

NA

<LLD

<LLD 0

0 19 19 NA NA

<LLD 0

0 00 OO

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

TABLE A-i RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE LASALLE COUNTY STATION, 2007 NAME OF FACILITY:

LASALLE DOCKET NUMBER:

50-373 & 50-374 LOCATION OF FACILITF MARSEILLES IL REPORTING PERIOD:

ANNUAL 2007 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN(M)

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN(M)

MEAN(M)

STATION #

NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F)

(F)

NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT)

(LLD)

MEASUREMENTS MILK (PCI/LITER)

CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 CS-134 CS-137 NA NA NA NA NA NA NA NA NA NA NA NA 15 NA 18 NA

<LLD

<LLD 0

0 0

<LLD

<LLD 0

0 0

0 00 1-0

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

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE LASALLE COUNTY STATION, 2007 NAME OF FACILITY:

LASALLE DOCKET NUMBER:

50-373 & 50-374 LOCATION OF FACILIT' MARSEILLES IL REPORTING PERIOD:

ANNUAL 2007 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN(M)

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN(M)

MEAN(M)

STATION #

NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F)

(F)

NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT)

(LLD)

MEASUREMENTS MILK (PCI/LITER)

VEGETATION (PCI/KG WET)

BA-140 LA-140 GAMMA MN-54 10 CO-58 FE-59 CO-60 ZN-65 NB-95 60 NA 15 NA NA

<LLD NA

<LLD

<LLD 0

0 0

9

-J oc

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

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE LASALLE COUNTY STATION, 2007 NAME OF FACILITY:

LASALLE DOCKET NUMBER:

50-373 & 50-374 LOCATION OF FACILIT' MARSEILLES IL REPORTING PERIOD:

ANNUAL 2007 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN(M)

LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN(M)

MEAN(M)

STATION #

NUMBER OF PATHWAY SAMPLED ANALYSIS ANALYSIS LOWER LIMIT (F)

(F)

NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT)

(LLD)

MEASUREMENTS VEGETATION (PCI/KG WET)

ZR-95 1-131 CS-134 CS-137 BA-140 LA-140 NA

<LLD 60

<LLD 80

<LLD NA

<LLD NA 23.4 (328/328)

(18/30)

<LLD

<LLD 0

0 0

0

<LLD

<LLD 19.6 (8/8)

(17/23)

DIRECT RADIATION (MILLI-ROENTGEN/QTR.)

TLD-QUARTERLY 336 26.5 (4/4)

(25/27)

L-102-1 INDICATOR 0.6 MILES NNE 0

o0

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

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

& ANALYTICAL METHODS 35 of 189

TABLE B-1:

Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, LaSalle County Station, 2007 Location Location Description Distance & Direction From Site A

Sijrface Water L-21 L-40 Illinois River at Seneca, Upstream (control)

Illinois River, Downstream (indicator)

R Ground[Well Water 4.0 miles NE 5.2 miles NNW 0 miles at station 7.0 miles NW L-27 L-28 LSCS Onsite Well (indicator)

Marseilles Well (indicator)

C Milk - hi-weeklv / mnnnthly L-42 Biros Farm (control) 14.2 miles E D

Air Partic.idlteq / Air Indcine 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)

F Fish L-34 L-35 L-36 LaSalle Cooling Lake (indicator)

Marseilles Pool of Illinois River, Downstream (indicator)

Illinois River, Upstream of Discharge (control) 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 4.0 miles NE 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

Sediment L-21 L-40 L-41 Illinois River at Seneca, Upstream (control)

Illinois River, Downstream (indicator)

G Food Prnurlit.

Quadrant 1 Quadrant 2 Quadrant 3 Quadrant 4 Control Diane Partridge Mike and Gina Welbourne Michael Olson Robert Eisers Eugene Clements B -I 36 of 189

TABLE B-i:

Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, LaSalle County Station, 2007 Location Location Description Distance & Direction From Site H

Environmental Dosimetry_ - TLD Inner RInd 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-1 11 b-1 and -2 L-1 12-1 and -2 L-113a-1 and -2 L-1 14-1 and -2 L-115-1 and -2 L-1 16-1 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 OthL a 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 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 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 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 Nearsite 1 (indicator)

Onsite 3 (indicator)

Rte. 170 (indicator)

Onsite 5 (indicator)

Nearsite 6 (indicator)

Seneca (indicator)

Marseilles (indicator)

Ransom (lnntrnl and Spterial Interest L-10-1 and -2 Streator 13.5 miles SW B-2 37 of 189

TABLE B-2:

Radiological Environmental Monitoring Program - Summary of Sample Collection and Analytical Methods, LaSalle County Station, 2007 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

.qamma spectroscopy Surface Water Gross Beta Monthly composite TBE, TBE-2008 Gross Alpha and/or gross beta activity in from weekly grab various matrices samples.

Env. Inc., W(DS)-01 Determination of gross alpha and/or

_ross 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 gamma spectroscopy Ground/Well Water Tritium Quarterly grab TBE, TBE-2011 Tritium analysis in drinking water by liquid samples.

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

Fish Gamma Spectroscopy Semi-annual samples TBE-2007 Gamma emitting radioisotope analysis collected via electroshocking or Env. Inc., GS-01 Determination of gamma emitters by other techniques gamma spectroscopy Sediment Gamma Spectroscopy Semi-annual grab TBE, TBE-2007 Gamma emitting radioisotope analysis samples Env. Inc., GS-01 Determination of gamma emitters by qamma soectroscopy 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 soectroscoov 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 spectroscopy (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., 1-131-01 Determination of 1-131 in milk by anion other times exchange 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 gamma spectroscopv Food Products Gamma Spectroscopy Annual grab samples.

TBE, TBE-2007 Gamma emitting radioisotope analysis Env. Inc., GS-01 Determination of gamma emitters by

,qamma soectroscopy TLD Thermoluminescence Quarterly TLDs Global Dosimetry Dosimetry comprised of two Global Dosimetry CaF2 elements.

B-3 38 of 189

t U

u U

U km

1*.

K T LoMOOn Figure B-1 Inner Ring TLD Locations of the LaSalle County Station, 2007 B-4 39 of 189

2'*6-t '

21;6.4 0

218-3*

211-40 211-3.

V.214.4 0 214-3 213-40 a 211-,

Qmnd

]~dot 211-2 20314 6

Vemns au W lan.mIno at, La We Coun*

n orW LUflSXIO co@unty 4 TLC UcaUo S tASaflStaUtn Figure B-2 Outer Ring TLD Locations of the LaSalle County Station, 2007 B-5 40 of 189

L. -Proy I4 amnd WadsU i6"ammn II Rpan~om 10 GrU~d

!1U IIS

,,.LM.

OU 9 iIIIII~ AL. *-'fav

$MONO%~-_____

ou L m mmm-mn---

Figure B-3 Fixed Air Sampling Locations of the LaSalle County Station, 2007 41 of 189 B-6

To) L-41 I.-

Fish I

Milk Sediment 0

Water Figure B-4 Ingestion and Waterborne Exposure Pathway Sample Locations of the LaSalle County Station, 2007 B-?7 42 of 189

APPENDIX C DATA TABLES AND FIGURES PRIMARY LABORATORY 43 of 189

TABLE C-I.1 CONCENTRATIONS OF GROSS BETA IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2007 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION L-21 L-40 PERIOD UI/U4/U(

02/01/07 03/01/07 04/05/07 05/03/07 06/07/07 07/05/07 08/02/07 09/06/07 10/04/07 11/08/07 12/06/07 Ul/Zb/U(

02/23/07 03/29/07 04/26/07 05/31/07 06/28/07 07/26/07 08/30/07 09/27/07 10/31/07 11/29/07 12/27/07 4.4 6.4 6.6 5.7 6.5 7.6 6.5 8.3 9.9 7.8 9.0 12

+/- Z.O.

+ 2.3

+ 2.2

+/- 2.0

+/- 2.2

_ 2.3

_ 1.9

+ 2.2

+ 2.4

+ 2.1

+ 2.5

+/- 3.8

4. t 5.4 9.7 7.3 6.6 7.5 8.0 8.7 9.5 11 8.1 8.8

-+ 2.U

+ 2.0

+/- 2.4

+/- 2.1

+/- 2.2

+ 2.3

+/- 2.0

+/- 2.2

+/- 2.3

+ 2.3

+ 2.4

+/- 3.6 MEAN 7.5 +/- 4.1 8.0 +/- 3.7 TABLE C-1.2 CONCENTRATIONS OF TRITIUM IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2007 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION L-21 L-40 PERIOD 01/04/07 04/05/07 07/05/07 10/04/07 MEAN*

- 03/29/07

- 06/28/07

- 09/27/07

- 12/27/07

192

< 177

< 184 456 +/- 130

< 185

< 174

< 185

< 172 456 +/- 0

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES c-I 44 of 189

TABLE C-I.3 CONCENTRATIONS OF GAMMA EMITTERS IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2007 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA STC COLLECTION PERIOD L-21 01/04/07 - 01/25/07 02/01/07 - 02/23/07 03/01/07 - 03/29/07 04/05/07 - 04/26/07 05/03/07 - 05/31/07 06/07/07 - 06/28/07 07/05/07 - 07/26/07 08/02/07 - 08/30/07 09/06/07 - 09/27/07 10/04/07 - 10/31/07 11/08/07 - 11/29/07 12/06/07 - 12/27/07 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 1-131 Cs-134 Cs-137 Ba-140 La-140 2

2 1

2 2

12 2

MEAN

<3

<2

<1

<3

<2

<1

<2

<3

<2

<1

<2

<1

<2

<6

<5

<4

<5

<2

<3

<6

<4

<3

<4

<5

<8

<4.

<5

<3

<4

<2

<4

<5

<3

<2

<1

<2

<1

<2

<1

<2

<1

<2

<4

<2

<1

<2

<6

<4

<3

<1

<2

<5

<3

<4

<2

<3

<5

<3

<4

<2

<3

<2

<3

<4

<3

<2

<1

<3

<2

<1

<2

<3

<2

<1

<2

<1

<2

<6

<3

<4

<2

<5

<3

<2

<3

<5

<4

<3

<2

<3

<2

<3

<4

< 12

< 14

<12

< 14

14

< 14

< 15

<13

< 14

< 13

<14

<3

<1

<2

<1

<2

<1

<2

<1

<2

<3

<2

<1

<2

<1

<2

<3

<2

<1

<2

<1

<2

<1

<2

<1

<2

<3

<2

<1

<2

<1

<2

25

21

< 18

< 22

16

< 18

26

< 21

20

< 16

< 20

21

< 26

< 21

< 22

< 21

17

< 18

< 16

< 20

< 21

< 16

21

< 21

<8

<7

<6

<4

<6

<8

<7

<6

<7

<9

<6

<7

<5

<6

<5

<8

<5

<7

<6 L-40 01/04/07 02/01/07 03/01/07 04/05/07 05/03/07 06/07/07 07/05/07 08/02/07 09/06/07 10/04/07 11/08/07 12/06/07 MEAN

- 01/25/07

- 02/23/07

- 03/29/07

- 04/26/07

- 05/31/07

- 06/28/07

- 07/26/07

- 08/30/07

- 09/27/07

- 10/31/07

- 11/29/07

- 12/27/07

<2

<1

<2

<1

<2

<2 12 15 14 13 12 14 10 14 14 13 15 13 00 100

TABLE C-I1.1 CONCENTRATIONS OF TRITIUM IN GROUND/WELL WATER SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2007 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION PERIOD L-27 L-28 01/11/07 - 01/11/07 04/12/07 - 04/12/07 07/19/07 - 07/19/07 10/11/07 - 10/11/07 186 156 161 193

< 188

157

< 161

< 191 MEAN C -3 46 of 189

TABLE C-11.2 CONCENTRATIONS OF GAMMA EMITTERS IN GROUNDIWELL WATER SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2007 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA STC COLLECTION Mn-54 PERIOD L-27 01/11/07

< 4 04/12/07

< 3 07/12/07

< 5 10/11/07

< 4 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140 La-140 MEAN

<4

<3

<5

<4

<5

<4

< 12

<7

<9

< 10

<11

<9

< 10

< 11

<10

<6

<3

<5

<4

<5

<4

<5

<4

<5

<9

<6

<9

<11

<9

< 10

<9

<8

<4

<3

<5

<6

<5

<4

<5

<8

<5

<8

<9

< 10

<8

<9

<7

<8

<9

<3

<4

<5

<4

<3

<5

<4

<5

<4 32 17 29 28 32 28 29 19 29 32

<9

<5

<9

< 10

<7

<8

< 10

<6

< 11

<10 L-28 01/11/07 04/12/07 07/12/07 Well #4 07/19/07 Well #5 10/11/07 Well #6 10/11/07

<4

<5

<4

<5 MEAN 0

00

TABLE C-II.1 CONCENTRATIONS OF GAMMA EMITTERS IN FISH SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2007 RESULTS IN UNITS OF PC/KG WET +/- 2 SIGMA STC COLLECTION PERIOD Mn-54 C0-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140 La-140 L-34 Channel Catfish Common Carp Channel Catfish Largemouth Bass 05/09/07 05/09/07 10/16/07 10/16/07

< 54

< 46

28

< 37

< 58

< 49

< 41

< 55

< 145

< 122

103

< 122

< 48

< 46

32

< 39

< 84

< 82

< 76

< 82

84

< 53

< 50

< 48

< 127

< 89

< 74

< 113

52

< 38

< 32

< 34

< 56

< 41

29

< 36 1000 787 606 708 285 251 188 206 MEAN L-35 Channel Catfish Smallmouth Buffalo Channel Catfish Smallmouth Buffalo 05/09/07 05/09/07 10/16/07 10/16/07

< 44

< 40

38

< 45

< 49

< 53

< 47

< 55

< 104

127

123

< 139

< 34

< 33

< 44

< 36

< 83

< 95

< 99

< 53

< 47

< 55

< 82

98

< 76

< 104

< 41

< 35

38

< 39

< 43

< 36

< 45 738 781 677 855 245 185 271 297 MEAN L-36 Channel Catfish Smallmouth Buffalo Channel Catfish Smallmouth Buffalo 05/09/07 05/09/07 10/16/07 10/16/07

36

< 51

68

< 44

< 32

< 66

< 98

68

< 98

< 158

207

157

< 31

< 58

< 73

< 57

< 73

< 130

< 156

< 135

< 43

< 75

< 89

< 88

< 66

< 121

142

< 116

< 32

< 55

< 60

<61

< 32

< 55

< 73

< 57 585 1000 1380 1220 162 281 397 335 MEAN 00 00 IC

TABLE C-IV.1 STC COLLECTION PERIOD L-21 10/04/07 MEAN L-40 05/09/07 10/04/07 MEAN L-41 05/09/07 10/04/07 MEAN CONCENTRATIONS OF GAMMA EMITTERS IN SEDIMENT SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2007 RESULTS IN UNITS OF PC/KG DRY +/- 2 SIGMA Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs

< 94

< 68

< 216

< 83

< 163

< 114

< 170

< 61

< 25

< 27

< 67

< 25

< 65

< 32

< 55

< 20

< 75

< 64

< 219

< 63

< 202

< 92

< 132

< 51

-134 Cs-137

< 80 Ba-140

< 678 La-140

< 185

< 84

< 150 26 +/- 18 < 325

< 88

< 503 (I

< 26

< 27

< 72

< 29

< 67

< 78

< 91

< 213

< 83

< 165 26 +/-0

< 36

< 56

< 21

< 30

< 100

< 191

< 58

< 95

< 371

< 102

< 833

< 184

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING THE POSITIVE VALUES 0

00 IC

TABLE C-V.1 CONCENTRATIONS OF GROSS BETA IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2007 RESULTS IN UNITS OF E-3 PCI/CU METER +/-2 SIGMA GROUPI I

GROUPI 11 GROUP III IGROUP IV COLLECTION PERIOD L-03 L-05 L-01 L-06 L-04 L-07 L-08 L-1 1 L-10 12/28/06-01/04/07 21 +/-5 19 +/-4 23+/-t5 25 +/-5 25 +/-5 24 +/-5 22 +/-4 26 +/-5 25+/-5 01/04/07 -01/11/07 18 +/- 4 20 +/- 4 19 +/- 4 19 +/- 4 15 +/- 4 20 +/- 4 23 +/- 5 19 +/- 4 20 +/-4 01/11/07

-01/18/07 16 +/- 4 15 +/- 4 17 +/- 4 20 +/- 5 16 +/- 4 14 +/- 4 17 +/- 4 16 +/- 4 16 +/-4 01/18/07 -01/25/07 35 +/-5 34 +/-5 38 +/-6 31 +/-5 33 +/-5 33 +/-5 36 +/-5 36 +/-5 31+/-5 01/25/07-02/01/07 20 +/-5 20 +/-4 23 +/-5 22 +/-5 23+/-t5' 26 +/-5 26 +/-5 23 +/-5 21+/-4 02/01/07-02/08/07 20 +/-5 17 +/-4 18 +/-4 22 +/-5 20 +/-5 23 +/-5 17 +/-4 26 +/-5 25+/-5 02/08/07 -02/15/07 21 +/- 4 14 +/- 4 18 +/- 4 17 +/- 4 19 +/- 4 22 +/- 4 18 +/- 4 20 +/- 4 13 +/-4 02/15/07-02/23/07 27 +/-4 21+/-t4 25 +/-4 23 +/-4 25 +/-4 25 +/-4 24 +/-4 23 +/-4 (1) 02/23/07

-03/01/07 12 +/- 4 10 +/- 4 15 +/- 5 17 +/- 5 13 +/- 4 11 +/- 4 10 +/- 4 17 +/- 5 12 +/- 4 03/01/07 -03/07/07 18 +/- 5 17 +/- 4 16 +/- 5 19 +/- 5 20 +/- 5 18 +/- 5 18 +/- 5 19 +/- 5 18 +/-5 03/07/07 -03/15/07 15 +/- 4 18 +/- 4 17 +/- 4 20 +/- 4 22 +/- 4 15 +/- 4 19 +/- 4 19 +/- 4 21 +/-4 03/15/07 -03/22/07 19 +/- 5 19 +/- 4 18 +/- 4 17 +/- 4 17 +/- 4 16 +/- 4 19 +/- 4 19 +/- 4 16 +/-4 03/22/07 -03/29/07 12 +/- 4 10 +/- 4 10 +/- 4 9 +/- 4 12 +/- 4 14 +/- 4 13 +/- 4 16 +/- 4 10 +/-4 03/29/07

-04/05/07 17 +/- 4 14 +/- 4 22 +/- 5 14 +/- 4 19 +/- 4 18 +/- 4 16 +/- 4 15 +/- 4 20 +/-4 04/05/07 -04/12/07 17 +/- 4 13 +/- 4 13 +/- 5 18 +/- 4 11 +/- 4 14 +/- 4 20 +/- 4 17 +/-4 16 +/-4 04/12/07

-04/19/07 18 +/- 4 20 +/- 4 19 +/- 4 16 +/- 4 20 +/- 4 20 +/- 4 17 +/- 4 18 +/-4 19 +/-4 04/19/07

-04/26/07 12 +/- 4 14 +/- 4 15 +/- 4 16 +/- 4 16 +/- 4 13 +/- 4 12 +/- 4 15 +/-4 17 +/-4 04/26/07 -05/03/07 13 +/- 4 16 +/- 4 13 +/- 4 11 +/- 4 17 +/- 4 12 +/- 4 14 +/- 4 14 +/-4 16 +/-4 05/03/07 -05/09/07 19 +/- 5 17 +/- 4 18 +/- 5 19 +/- 5 19 +/- 4 19 +/- 5 21 +/- 5 19 +/-5 21 +/-5 05/09/07 -05/17/07 20 +/- 4 15 +/- 4 19 +/- 4 14 +/- 4 16 +/- 4 19 +/- 4 16 +/- 4 16 +/-4 13 +/-4 05/17/07-05/24/07 25 +/-5 21 +/-4 24 +/-5 23 +/-5 22 +/-5 21 +/-5 21 +/-5 23+/-5 19+/-4 05/24/07-05/31/07 19 +/-4 20 +/-4 20 +/-4 19 +/-4 19 +/-4 23 +/-5 21 +/-4 21+/-4 18+/-4 05/31/07 -06/07/07 14 +/- 4 14 +/- 4 16 +/- 4 11 +/- 4 16 +/- 4 13 +/- 4 12 +/- 4 16 +/-4 11 +/-4 06/07/07-06/14/07 23 +/-5 24 +/-5 17 +/-4 26 +/-5 24+/-t5 20 +/-4 17 +/-4 23+/-5 23+/-5 06/14/07-06/21/07 29 +/-5 24 +/-4 27 +/-5 27 +/-5 24 +/-4 26 +/-5 24 +/-4 26+/-5 28+/-5 06/21/07 -06/28/07 17 +/- 4 16 +/- 4 13 +/- 4 19 +/- 4 17 +/- 4 17 +/- 4 17 +/- 4 20 +/-4 19 +/-4 06/28/07 -07/05/07 10 +/- 4 11 +/- 4 17 +/- 4 12 +/- 4 15 +/- 4 12 +/- 4 11 +/- 4 14 +/-4 14 +/-4 07/05/07-07/12/07 22 +/-5 19 +/-5 20 +/-5 34 +/-8 21 +/-5 26 +/-5 26 +/-5 23+/-5 28+/-5 07/12/07 -07/19/07 15 +/- 4 16 +/- 5 17 +/- 4 18 +/- 4 16 +/- 4 12 t 4 14 +/- 4 16 +/-5 15 +/-4 07/19/07-07/26/07 23 +/-4 19 +/-4 18 +/-4 20 +/-4 23 +/-4 (1) 20 +/-4 24+/-5 20+/-4 07/26/07-08/02/07 26 +/-5 24 +/-5 30+/-t5 25 +/-5 27 +/-5 (1) 25 +/-5 29+/-5 26+/-5 08/02/07-08/08/07 26 +/-5 22 +/-5 27 +/-5 37 +/-9 26 +/-5 (1) 28 +/-5 28+/-5 31+/-5 08/08/07-08/15/07 24 +/-5 23 +/-5 26 +/-5 (1) 24 +/-5 (1) 14 +/-4 28+/-5 24+/-5 08/15/07 -08/23/07 19 +/- 4 17 +/- 4 16 +/- 4 15 +/- 4 18 +/- 4 (1) 16 +/- 4 16 +/- 4 20 +/-4 08/23/07-08/30/07 27 +/-5 22 +/-4 27 +/-5 23 +/-4 27 +/-5 (1) 23 +/-5 30 +/-5 24+/-5 08/30/07-09/06/07 25 +/-5 28 +/-5 26 +/-5 33 +/-5 29 +/-5 (1) 30 +/-5 30 +/-5 32+/-5 09/06/07 -09/13/07 16 +/- 4 18 +/- 4 16 +/- 4 13 t 4 14 +/- 4 11 +/- 6 15 +/- 4 16 +/- 4 13 +/-4 09/13/07-09/20/07 25 +/-5 26 +/-5 25 +/-5 26 +/-5 26 +/-5 28 +/-5 28 +/-5 34 +/-5 26+/-5 09/20/07-09/27/07 27 +/-5 26 +/-5 25 +/-5 28 +/-5 23 +/-5 20 +/-5 27 +/-5 30 +/-5 27+/-5 09/27/07-10/04/07 29 +/-5 28 +/-5 35 +/-6 36 +/-6 29 +/-5 31 +/-5 29 +/-5 34 +/-5 31+/-5 10/04/07 -10/11/07 16 +/- 4 16 +/- 4 16 +/- 4 17 +/- 4 15 +/- 4 17 +/- 4 20 +/- 4 20 +/- 4 18 +/-4 10/11/07 -10/18/07 22 +/- 5 21 +/- 5 22 +/- 5 24 +/- 5 20 +/- 5 23 +/- 5 20 +/- 5 21 +/- 5 17 +/-4 10/18/07-10/24/07 21 +/-5 22 +/-5 26 +/-5 21 +/-5 21 +/-5 23 +/-5 23 +/-5 26 +/-5 21+/-5 10/24/07 -10/31/07 19 +/- 4 17 +/- 4 21 +/- 5 20 +/- 5 21 +/- 5 20 +/- 5 21 +/- 5 22 +/- 5 17 +/-4 10/31/07

-11/08/07 20 +/- 4 17 +/- 4 18 +/- 4 17 +/- 4 18 +/- 4 18 +/- 4 20 +/- 4 20 +/- 4 16 +/-4 11/08/07

-11/15/07 31 +/- 5 31 +/- 5 35 +/- 5 29 +/- 5 27 +/- 5 30 +/- 5 33 +/- 5 31 +/- 5 34 +/-5 11/15/07

-11/21/07 20 +/- 5 24 +/- 5 27 +/- 6 31 t 6 24 +/- 5 28 +/- 6 30 +/- 6 28 +/- 6 22 +/-5 11/21/07

-11/29/07 27 +/- 4 26 +/- 4 28 +/- 4 22 +/- 4 28 +/- 4 27 +/- 4 26 +/- 4 27 +/- 4 24 +/- 4 11/29/07-12/06/07 23 +/-5 24 +/-5 26 +/-5 23 +/-5 22 +/-5 25 +/-5 28 +/-5 24 +/-5 26+/- 5 12/06/07-12/13/07 36 +/-5 41 +/-6 38 +/-5 40 +/-5 38 +/-5 40 +/-5 45 +/-6 29 +/-5 38+/- 5 12/13/07-12/20/07 42 +/-6 36 +/-5 35 +/-5 47 +/-6 43 +/-6 44 +/-6 46 +/-6 38+/-t5 44+/- 6 12/20/07-12/27/07 24 +/-5 30 +/-5 35 +/-6 33 +/-5 36+/-t6 36 +/-6 38 +/-6 37 +/-6 36+/-t6 12/27/07-01/03/08 25 +/-5 37 +/-5 39 +/-6 37 +/-5 35 +/-5 37 +/-5 39 +/-6 38 +/-6 39+/- 6 MEAN*

21 +/- 13 21 +/- 14 22 +/- 14 23 +/- 16 22 +/- 13 22 +/- 16 22 +/- 16 23 +/- 13 22 +/- 15 (1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION C - 7 C-7 50 of 189

TABLE C-V.2 MONTHLY AND YEARLY MEAN VALUES OF GROSS BETA CONCENTRATIONS (E-3 PCIICU METER) IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2007 GROUP I - NEAR-SITE LOCATIONS GROUP 11 - FAR-FIELD LOCATIONS GROUP III - FAR-FIELD LOCATIONS GROUP IV - CONTROL LOCATION COLLECTION PERIOD 12/28/06

-02/01/07 02/01/07

-03101/07 03/01/07

-03/29/07 03/29/07

-05/03/07 05/03/07

-05/31/07 05/31/07

-06/28/07 06/28/07

-08/02/07 08/02/07

-08/30/07 08/30/07

-09/27/07 09/27/07

-10/31/07 00 10/31/07

-11/29/07 11/29/07

-01/03/08 MIN MAX MEAN+/-

2SD 15 35 22 +/-14 10 27 18 +/-11 10 19 16 +/-7 12 20 15+/- 5 15 25 19+/- 6 14 29 20 +/-11 10 26 18 +/-11 17 27 22 +/-7 16 28 24+/- 9 16 29 21+/- 9 17 31 24 +/-11 23 42 32 +/-15 COLLECTION PERIOD 12/28/06

-02/01/07 02/01/07

-03/01/07 03/01/07

-03/29/07 03/29/07

-05/03/07 05/03/07

-05/31/07 05/31/07

-06/28/07 06/28/07

-08/02/07 08/02/07

-08/30/07 08/30/07

-09/27/07 09/27/07 -10/31/07 10/31/07

-11/29/07 11/29/07

-01/03/08 MIN MAX MEAN+/-

2SD 17 38 24 +/-13 15 25 19 +/-7 9

20 16+/- 8 11 22 16 +/-7 14 24 19+/- 6 11 27 19 +/-13 12 34 21 +/- 13 15 37 24 +/-15 13 33 24 +/-13 16 36 24 +/-14 17 35 26 +/- 12 23 47 35 +/-14 COLLECTION PERIOD 12/28/06

-02/01/07 02/01/07

-03/01/07 03/01/07

-03/29/07 03/29/07

-05/03/07 05/03/07

-05/31/07 05/31/07

-06/28/07 06/28/07

-08/02/07 08/02/07

-08/30/07 08/30/07

-09/27/07 09/27/07

-10/31/07 10/31/07

-11/29/07 11/29/07

-01/03/08 MIN MAX MEAN+/-

2SD COLLECTION PERIOD MIN MAX MEAN+/-

2SD 14 10 12 11 16 12 11 14 11 15 18 22 36 26 22 20 23 26 29 30 34 34 33 46 24 +/- 14 20 +/- 10 17 +/- 5 16 +/- 6 20 +/- 4 20 +/- 9 20 +/- 12 23 +/- 11 24 +/- 14 23 +/- 10 26 +/- 9 36 +/- 14 12/28/06 0 2/01/07 02/01/07

-03/01/07 03/01/07

-03/29/07 03/29/07

-05/03/07 05/03/07

-05/31/07 05/31/07

-06/28/07 06/28/07

-08/02/07 08/02/07

-08/30/07 08/30/07

-09/27/07 09/27/07

-10/31/07 10/31/07

-11/29/07 11/29/07

-01/03/08 l6 12 10 16 13 11 14 20 13 17 16 26 31 25 21 20 21 28 28 31 32 31 34 44 23 +/- 11 17 +/- 15 16 +/- 9 18 +/- 4 18 +/- 7 20 +/- 15 21 +/- 12 25 +/- 9 25 +/- 16 21 +/- 12 24 +/- 15 37 +/- 13 12/28/06

- 01/03/08 10 42 21 +/- 13 12/28/06 - 01/03/08 9

47 22 +/- 15 12/28/06 - 01/03/08 10 46 22 +/- 15 12/28/06 - 01/03/08 10 44 22 +/- 15 0

00

TABLE C-V.3 CONCENTRATIONS OF GAMMA EMITTERS IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2007 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA STC COLLECTION PERIOD L-01 12/28/06 - 03/29/07 03/29/07 - 06/28/07 06/28/07 - 09/27/07 09/27/07 - 01/03/08 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140 La-140

<1

<5

<3

<2

< 10

<5

<4

<5

< 37

< 19

< 13

<1

<4

<2

<9

<7

<6

<2

<11

<6

<2

< 20

<9

< 10

<1

<4

<2

<1

<2

<2 197 6740 873 594 90 2500 280 215 MEAN I-L-03 12/28/06 03/29/07 06/28/07 09/27/07 MEAN L-04 12/28/06 03/29/07 06/28/07 09/27/07 MEAN L-05 12/28[06 03/29/07 06/28/07 09/27/07 MEAN

- 03/29/07

- 06/28/07

- 09/27/07

- 01/03/08

<2

<5

<3

<9

<5

<4

< 14

< 35

< 27

< 20

<2

<3

<4

<3

<6

< 14

< 11

<9

<4

< 13

<8

<6

< 18

< 16

< 12

<2

<4

<3

<2

<3

<2 502 6570 967 700 185 3660 167 359

- 03/29/07

- 06/28/07

- 09/27/07

- 01/03/08

<2

<3

<5

<7

<6

<5

< 16

< 40

< 15

< 11

<2

<3

<7

< 10

<7

<5

< 12

<6

<4

<9

< 18

< 11

<9

<2

<4

<3

<2

<3

<2

<2 656 5210 835 597 279 2250 386 210

- 03/29/07

- 06/28/07

- 09/27/07

- 01/03/08

<2

<3

<5

<6

< 14

< 24

< 23

<1

<3

<4

<3

<5

<8

< 10

<6

<5

<7

<8

< 13

< 10

< 11

<2

<4

<3

<2

<3

<3 612 4780 1020 800 222 2670 428 233 0

00

\\Ch

TABLE C-V.3 CONCENTRATIONS OF GAMMA EMITTERS IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2007 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA STC COLLECTION PERIOD L-06 12/28/06 - 03/29/07 03/29/07 - 06/28/07 06/28/07 - 09/27/07 09/27/07 - 01/03/08 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-1 37 Ba-140 La-140 3

4 6

3 5

11 7

7

< 11

< 41

< 24

21

<2

<3

<6

<8

<11

<8

<5

<9

< 10

<6

<9

< 17

< 16

< 10

<2

<3

<6

<3

<2

<4

<3 689 5190 1320 812 251 2790 437 409 MEAN 0

L-07 12/28/06 03/29/07 06/28/07 09/27/07 MEAN L-08 12/28/06 03/29/07 06/28/07 09/27/07 MEAN L-10 12/28/06 03/29/07 06/28/07 09/27/07 MEAN 03/29/07 06/28/07

- 09/27/07

- 01/03/08

<3

<4

<8

<3

<5

<9

<13

<5

14

38

< 53

<14

<1

<3

<9

<2

<5

< 10

< 26

<8

<4

< 11

< 17

<5

<9

20

< 33

<8

<2

<5

< 11

<3

<2

<4

<7

<2 598 7110 2230 711 178 2650 878 240 03/29/07 06/28/07

- 09/27/07

- 01/03/08

<2

<5

<3

<5

< 11

<5

15

< 26

< 17

19

<2

<4

<2

<6

<10

<8

<6

<4

<11

<7

<5

<8

< 16

< 11

<8

<2

<4

<3

<2

<3

<2

<2 704 5360 895 722 232 1610 255 294 03/29/07

- 06/28/07

- 09/27/07

- 01/03/08

<3

<4

<3

<6

<7

<8

<5

< 14

< 25

22

< 18

<1

<2

<3

<6

<8

< 12

<10

<5

<8

<6

<7

< 14

<10

< 10

<2

<3

<4

<3

<2

<4

<2 578 6130 1000 826 215 1680 508 454 0*

00

TABLE C-V.3 STC COLLECTION PERIOD L-1 1 12/28/06 -

03/29/07 03/29/07 - 06/28/07 06/28/07 - 09/27/07 09/27/07 - 01/03/08 MEAN CONCENTRATIONS OF GAMMA EMITTERS IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2007 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137

<2

<4

<12

<2

<6

<4

<7

<2

<4

<11

<29

<4

< 14

< 10

< 16

<4

< 3

<3

<7

<14

<4

<9

<12

<5

<4

<3

< 6

<22

<4

<7

<6

<11

<3

<3 U

Ba-140

< 562

< 6730 1340

< 946 La-140

< 212

< 2160

< 395

291 0

00

ýc

TABLE C-VI.1 CONCENTRATIONS OF 1-131 IN AIR IODINE SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2007 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA GROUP I I

GROUP II GROUP III I GROUP IV COLLECTION PERIOD L-03 12/28/06

-01/04/07

< 19 01/04/07

-01/11/07

< 61 01/11/07 -01/18/07

< 36 01/18/07 -01/25/07

< 64 01/25/07 -02/01/07

< 57 02/01/07 -02/08/07

< 54 02/08/07 -02/15/07

< 62 02/15/07 -02/23/07

< 22 02/23/07 -03/01/07

< 41 03/01/07

-03/07/07

< 62 03/07/07

-03/15/07

< 24 03/15/07

-03/22/07

< 69 03/22/07

-03/29/07

< 63 03/29/07

-04/05/07

< 44 04/05/07

-04/12/07

< 54 04/12/07

-04/19/07

< 42 04/19/07

-04/26/07

< 25 04/26/07 -05/03/07

< 66 05/03/07 -05/09/07

< 69 05/09/07 -05/17/07

< 27 05/17/07

-05/24/07

< 26 05/24/07 -05/31/07

< 67 05/31/07 -06/07/07

< 16 06/07/07

-06/14/07

< 41 06/14/07 -06/21/07

< 41 06/21/07 -06/28/07

< 20 06/28/07 -07/05/07

< 32 07/05/07 -07/12/07

< 41 07/12/07 -07/19/07

< 33 07/19/07 -07/26/07

< 56 07/26/07 -08/02/07

< 55 08/02/07 -08/08/07

< 30 08/08/07 -08/15/07

< 53 08/15/07 -08/23/07

< 68 08/23/07

-08/30/07

< 42 08/30/07

-09/06/07

< 59 09/06/07 -09/13/07

< 53 09/13/07 -09/20/07

< 50 09/20/07

-09/27/07

< 62 09/27/07 -10/04/07

< 57 10/04/07 -10/11/07

< 68 10/11/07 -10/18/07

< 25 10/18/07 -10/24/07

< 63 10/24/07 -10/31/07

< 59 10/31/07 -11/08/07

< 26 11/08/07 -11/15/07

< 64 11/15/07 -11/21/07

< 51 11/21/07 -11/29/07

< 34 11/29/07 -12/06/07

< 54 12/06/07 -12/13/07

< 40 12/13/07 -12/20/07

< 28 12/20/07

-12/27/07

< 59 12/27/07 -01/03/08

< 43 L-05

18

57

34

60

54

< 51

56

48

39

57

23

65

60

34

51

40

23

63

64

25

24

63

15

41

41

21

32

< 41

39

59

55

31

33

68

<43

59

53

50

62

58

68

42

63

59

31

64

51

34

53

40

28

59

43 L-0 1

18

47

35

31

41

53

59

50

< 40

60

23

65

62

53

64

41

13

63

66

26

25

64

15

<41

< 41

20

32

41

32

57

55

19

53

68

43

59

53

33

52

35

54

42

63

58

26

64

50

34

23

30

15

33

24 L-0I

13

59

41

62

55

29

32

38

26

60

12

36

34

43

46

41

24

64

43

14

19

32

< 8

27

<41

< 11

17

66

16

44

64

61

68

41

54

41

50

62

58

67

42

45

58

32

43

25

23

54

< 40

27

59

< 44 6

L-04

18

59

35

62

55

53

59

49

39

56

23

65

64

42

52

41

24

63

64

26

25

64

15

41

22

20

32

41

32

56

55

31 (1)

< 53

67

43

59

53

50

62

57

67

42

63

32

26

64

50

34

54

40

27

59

44 L

L-08 L-1 1 L-10 I

< 29

<68

< 69

<40

< 43

<67

< 69

< 59

< 45

< 46

<62

< 62

< 39

< 38

<66

< 66

< 55

<30

< 30

<60

< 60

< 55

< 54

< 47

<31

< 40

< 48

< 49

<65

< 65

< 45

< 24

<24

< 24

<25

< 25

<48

< 48

<15

< 15

<36

< 37

< 34

<25

< 25

<46

< 49

<41

< 40

<29

< 24 (1)

< 68 (1) < 65 (1) < 57 (1) < 30 (1) < 69 (1)

< 43 (1)

< 54

<62

< 21

<46

< 46

<68

< 68

<67

< 66

<66

< 66

< 55

<68

< 68

< 33

< 32

< 33

< 30

<69

< 69

<59

< 59

<46

< 46

< 53

<31

< 47

<28

< 28

<52

< 52

<36

< 36

< 29

67

23

69

60

46

60

38

66

55

30

60

54

54

28

39

48

65

43

24

25

< 47

15

37

33

25

49

23

28

68

65

57

29

69

42

54

41

46

68

65

66

55

66

32

28

69

57

45

53

< 47

28

51

36

68

41

69

61

46

62

66

55

30

60

54

54

46

42

48

65

43

24

25

47

15

37

33

25

49

41

23

68

65

57

29

69

23

54

41

46

68

65

66

55

66

33

30

69

59

46

53

47

28

51

37 MEAN-(1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION C-12 C-1255 of 189

TABLE C-VII.1 CONCENTRATIONS OF 1-131 IN MILK SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2007 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA CONTROL DAIRY

. L-42 COLLECTION PERIOD 01/04/07 02/01/07 03/01/07 04/05/07 05/04/07 05/18/07 06/01/07 06/15/07 06/29/07 07/13/07 07/27/07 08/08/07 08/24/07 09/06/07 09/21/07 10/05/07 10/19/07 11/01/07 12/06/07

< 0.8

< 0.4

< 0.6

< 0.7

0.6

< 0.5

< 0.6

0.7

< 0.6

< 0.5

0.8

< 0.5

< 0.4

< 0.7

< 0.9

< 0.7 MEAN C-13 56 of 189

TABLE C-VII.2 CONCENTRATIONS OF GAMMA EMITTERS IN MILK SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2007 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA STC COLLECTION Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Cs-134 Cs-137 Ba-140 La-140 PERIOD L-42 01/04/07 02/01/07 03/01/07 04/05/07 05/04/07 05/18/07 06/01/07 06/15/07 06/29/07 07/13/07 07/27/07 08/08/07 08/24/07 09/06/07 09/21/07 10/05/07 10/19/07 11/01/07 12/06/07

<7

<6

<5

<4

<5

<4

<5

<6

<4

<8

<4

<7

<2

<7

< 6

<7

< 10

<5

<6

<5

<3

<6

<5

<6

<4

<9

<5

<8

<2

<7

<8

< 16

< 18

<13

< 11

14

<12

< 12

< 15

< 16

< 13

<11

< 22

< 11

< 17

<6

< 19

<9

<8

<5

<6

<5

<4

<5

<7

<6

<7

<3

<9

<5

<8

<2

<8

<6

< 17

< 21

<13

<12

< 10

< 11

<12

<10

< 14

< 13

<9

19

< 12

< 16

<5

< 17

<7

<8

<5

<6

<5

<7

<5

<7

< 5

<7

<2

<8

<11

<15

<8

<9

<8

<9

<11

<12

<11

<9

< 14

<9

< 10

<4

< 11

< 14

<6

<7

<4

<5

<4

<5

<4

<3

<5

<4

<7

<4

<7

<2

<6

<8

<6

<5

<4

<6

<3

<7

<5

<8

<2

<6

<7

29

< 39

< 23

< 29

< 31

< 23

< 40

< 44

< 35

< 38

38

< 35

< 37

< 43

27

< 45

<18

< 44

< 54

< 12

< 15

<7

<10

<7

<6

<12

<13

<9

< 13

< 12

<14

< 15

<7

< 13

<6

< 14

<13 MEAN 00 00

TABLE C-VIII.1 CONCENTRATIONS OF GAMMA EMITTERS IN FOOD PRODUCT SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2007 RESULTS IN UNITS OF PCI/KG WET +/- 2 SIGMA STC COLLECTION Mn-54 PERIOD Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 1-131 Cs-134 Cs-137 Ba-140 La-140 L-CONTROL Cabbage Onions L-QUAD 1 Horseradish C

Horseradish leaves tI L-QUAD 2 Beet greens Beets 09/08/07

< 11

< 7

< 31

< 16

< 28

< 12

< 15

< 23

< 10

< 16

< 59

< 23 09/08/07

< 19

< 15

< 44

< 27

< 45

< 25

< 48

< 59

< 20

< 133

< 23 MEAN 08/30/07

< 8

< 10

< 23

< 8

< 19

< 9

< 15

< 54

< 7

< 89

< 23 08/30/07

< 9

< 11

<29

< 10

< 24

< 10

< 18

<46

<8

< 9

< 80

< 25 MEAN 08/30/07

< 11

< 15

< 46

< 13

< 31

< 17

< 29

< 50

< 9

< 13

< 279

< 80 08/30/07

< 7

< 8

< 22

< 8

< 19

< 10

< 16

< 52

< 7

< 8

< 89

< 26 MEAN 08/30/07

< 11

< 12

< 34

< 10

< 27

< 13

< 22

< 57

< 9

< 11

< 99

< 31 08/30/07

< 10

< 12

< 31

< 11

< 26

< 12

< 21

< 60

< 9

< 10

< 110

< 31 MEAN L-QUAD 3 Beet greens Beets L-QUAD 4 Beets Cabbage 08/30/07

< 7 08/30/07

< 4

<8

<5

<18

<6

<13

<4

<16

<8

<10

<5

< 13

<50

<6

<8

<29

<3

<7

<4

< 79

< 23

< 44

< 13 MEAN 00 0

10

TABLE C-IX.1 QUARTERLY TLD RESULTS FOR LASALLE COUNTY STATION, 2007 RESULTS IN UNITS OF MILLI-ROETGEN/QUARTER +/-2 STANDARD DEVIATIONS STATION MEAN JAN - MAR APR - JUN JUL - SEP OCT - DEC CODE

+/-- 2 S.D.

L-01-1 24.0 +/- 3.7 26 22 23 25 L-01-2 23.8 +/- 4.4 26 21 23 25 L-03-1 23.3 +/- 3.4 24 21 23 25 L-03-2 23.5 +/- 3.5 23 22 23 26 L-04-1 22.8 +/- 3.0 22 22 22 25 L-04-2 21.0 +/- 2.8 21 20 20 23 L-05-1 22.8 +/- 4.4 25 20 22 24 L-05-2 22.3 +/- 6.4 21 20 21 27 L-06-1 23.3 +/- 3.0 22 24 22 25 L-06-2 22.3 +/- 3.8 21 21 22 25 L-07-1 22.8 +/- 4.4 24 22 20 25 L-07-2 23.0 +/- 5.2 22 20 24 26 L-08-1 22.5 +/- 4.2 23

22.

20 25 L-08-2 21.8 +/- 3.4 22 20 21 24 L-10-1 20.0 +/- 4.3 20 18 19 23 L-10-2 19.3 +/- 3.4 20 17 19 21 L-11-1 20.3 +/- 4.4 21 18 19 23 L-11-2 20.8 +/- 1.9 20 20 22 21 L-101-1 23.3 +/- 4.4 22 21 24 26 L-101-2 23.0 +/- 4.3 23 21 22 26 L-102-1 26.5 +/- 2.0 27 25 27 27 L-102-2 24.3 +/- 2.5 24 23 24 26 L-103-1 23.5 +/- 3.5 24 21 25 24 L-103-2 23.3 +/- 2.5 23 22 23 25 L-104-1 23.3 +/- 4.1 21 22 25 25 L-104-2 21.8 +/- 4.1 22 19 22 24 L-105-1 24.5 +/- 4.8 23 22 26 27 L-105-2 24.5 +/- 4.2 24 22 27 25 L-106-1 22.3 +/- 3.8 22 21 21 25 L-106-2 23.3 +/- 4.7 25 20 25 23 L-107-1 23.5 +/- 3.5 24 21 25 24 L-107-2 24.0 +/- 3.7 22 23 25 26 L-108-1 22.5 +/- 3.5 22 21 22 25 L-108-2 20.0 +/- 3.7 22 18 19 21 L-109-1 23.8 +/- 3.0 23 22 25 25 L-109-2 23.8 +/- 4.4 23 22 23 27 L-110-1 23.5 +/- 2.0 23 23 23 25 L-110-2 24.3 +/- 3.0 23 23 25 26 L-112-1 22.8 +/- 4.7 23 21 21 26 L-112-2 26.0 +/- 4.0 25 25 25 29 L-114-1 24.0 +/- 2.3 25 23 23 25 L-114-2 24.3 +/- 2.5 24 23 26 24 L-115-1 22.5 +/- 3.5 23 20 23 24 L-115-2 21.5 +/- 2.0 21 21 23 21 L-116-1 21.5 +/- 2.0 21 21 21 23 L-116-2 22.3 +/- 3.8 22 21 21 25 C-16 59 of 189

TABLE C-IX.1 QUARTERLY TLD RESULTS FOR LASALLE COUNTY STATION, 2007 RESULTS IN UNITS OF MILLI-ROETGEN/QUARTER +/-2 STANDARD DEVIATIONS STATION MEAN JAN - MAR APR - JUN JUL - SEP OCT - DEC CODE

+/-- 2 S.D.

L-201-3 20.8 +/- 4.4 22 18 20 23 L-201-4 24.3 +/- 1.9 24 23 25 25 L-202-3 21.8 +/- 5.3 24 19 20 24 L-202-4 20.8 +/- 4.4 20 19 20 24 L-203-1 23.0 +/- 3.7 25 22 21 24 L-203-2 23.5 +/- 3.5 21 24 25 24 L-204-1 25.3 +/- 3.8 24 25 28 24 L-204-2 23.0 +/- 2.8 23 22 22 25 L-205-1 23.8 +/- 3.0 22 23 25 25 L-205-2 25.3 +/- 4.1 23 25 25 28 L-205-3 23.8 +/- 2.5 24 22 25 24 L-205-4 22.3 +/- 3.0 24 21 21 23 L-206-1 23.0 +/- 2.8 21 23 24 24 L-206-2 24.0 +/- 6.3 22 21 25 28 L-207-1 24.8 +/- 5.5 26 22 23 28 L-207-2 23.8 +/- 3.4 26 23 22 24 L-208-1 24.8 +/- 1.9 25 24 26 24 L-208-2 24.0 +/- 3.7 23 22 26 25 L-209-1 23.3 +/- 4.1 22 21 25 25 L-209-2 23.5 +/- 2.6 22 24 23 25 L-210-1 24.8 +/- 4.4 24 22 27 26 L-210-2 25.8 +/- 4.4 29 25 24 25 L-211-1 24.5 +/- 6.0 23 23 23 29 L-211-2 26.0 +/- 3.7 27 24 25 28 L-212-1 24.8 +/- 4.1 25 22 25 27 L-212-2 24.0 +/- 2.8 24 22 25 25 L-213-3 22.3 +/- 2.5 22 21 22 24 L-213-4 27.5 +/- 25 21 21 22 24 L-214-3 25.3 +/- 6.8 22 30 25 24 L-214-4 27.8 +/- 18 23 21 26 28 L-215-3 25.8 +/- 1.0 26 26 26 25 L-215-4 25.0 +/- 1.6 24 25 25 26 L-216-3 24.0 +/- 4.3 24 23 22 27 L-216-4 22.5 +/- 6.8 26 24 22 18 L-111B-1 24.8 +/- 4.1 23 23 26 27 L-111B-2 24.0 +/- 3.7 23 22 26 25 L-113A-1 25.0 +/- 2.8 23 26 26 25 L-113A-2 24.0 +/- 2.3 23 23 25 25 C -17 60 of 189

TABLE C-IX.2 MEAN QUARTERLY TLD RESULTS FOR THE INNER RING, OUTER RING, OTHER AND CONTROL LOCATIONS FOR LASALLE COUNTY STATION, 2007 RESULTS IN UNITS OF MILLI-ROETGEN/QUARTER +/- 2 STANDARD DEVIATIONS OF THE STATION DATA COLLECTION PERIOD JAN-MAR APR-JUN JUL-SEP OCT-DEC INNER RING

+/-2 S.D.

23.1 +/- 2.6 21.9 +/- 3.3 23.9 +/- 4.0 25.0 + 3.3 OUTER RING OTHER CONTROL 23.6 +/- 3.9 22.7 +/- 4.5 23.8 +/- 4.2 25.1 +/- 4.1 22.7 +/- 3.7 20.9 +/- 2.8 21.7 +/- 2.8 24.6 +/- 2.8 20.0 +/- 0.0 17.5 +/- 1.4 19.0 +/- 0.0 22.0 +/- 2.8 TABLE C-IX.3

SUMMARY

OF THE AMBIENT DOSIMETRY PROGRAM FOR LASALLE COUNTY STATION, 2007 RESULTS IN UNITS OF MILLI-ROENTGEN/QUARTER LOCATION SAMPLES PERIOD ANALYZED MINIMUM PERIOD MAXIMUM INNER RING OUTER RING OTHER CONTROL 128 136 64 8

18 18 18 17 29 30 27 23 PERIOD MEAN

+/- 2 S.D.

23.5 +/- 4.0 23.8 +/- 4.5 22.5 +/- 4.1 19.6 +/- 3.7 INNER RING STATIONS - L-101-1, L-101-2, L-102-1, L-102-2, L-103-1, L-103-2, L-104-1, L-104-2, L-105-1, L-105-2, L-106-1, L-106-2, L-107-1, L-107-2, L-108-1, L-108-2, L-109-1, L-109-2, L-110-1, L-110-2, L-111B-1, L-111B-2, L-112-1, L-112-2, L-113A-1, L-113A-2, L-114-1, L-114-2, L-115-1, L-115-2, L-116-1, L-1 16-2 OUTER RING STATIONS-L-201-3, L-201-4, L-202-3, L-202-4, L-203-1, L-203-2, L-204-1, L-204-2, L-205-1, L-205-2, L-205-3, L-205-4, L-206-1, L-206-2, L-207-1, L-207-2, L-208-1, L-208-2, L-209-1, L-209-2, L-210-1, L-210-2, L-211-1, L-211-2, L-212-1, L-212-2, L-213-3, L-213-4, L-214-3, L-214-4, L-215-3, L-215-4, L-216-3, L-216-4 OTHER STATIONS - L-01-1, L-01-2, L-03-1, L-03-2, L-04-1, L-04-2, L-05-1, L-05-2, L-06-1, L-06-2, L-07-1, L-07-2, L-08-1, L-08-2, L-11-1, L-11-2 CONTROL STATIONS - L-10-1, L-10-2 C-18 61 of 189

FIGURE C-1 Surface Water - Gross Beta - Station L-21 and L-40 Collected in the Vicinity of LCS, 2000 - 2004 L-21 Illinois River at Seneca 4.0-2.0 01IJ1*0

1:2-31! -0,ý 12-131-02 1,21-31 -0:3 12-3--

.* 04 L-40 Illinois River Downstream

W10

-I U

0 1 -0 1:-L0 12-13 1-00 1,2.-3 4..O' 1 --

0 2z3t0

2* -'

C-19 62 of 189

FIGURE C-1 (cont.)

Surface Water - Gross Beta - Station L-21 and L-40 Collected in the Vicinity of LCS, 2005 - 2007 L-21 Illinois River at Seneca 14.0-10.0 8.0 A

C.)

nA v

01/27/05 07/23/05 01/16/06 07/12/06 01/05/07 07/01/07 12/25/07 L-40 Illinois River Downstream 12.0 10.0 8.0 C,_

0.

6.0 4.0 2.0 0.0 I

I I

I 01-27-05 07-23-05 01-16-06 07-12-06 01-05-07 07-01-07 12-25-07 DUE TO VENDOR CHANGE IN 2005, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE 2005 AND MDC VALUES AFTER JUNE 2005 C - 20 63 of 189

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 CJ 13073 120 1H0 20-302 I 2t' 0 (00 12-31 12-31-01 12-311-02 12-il-0.1 12-33)-04 L-40 lllinois River Downstream

-J U3 I '~3 4Y~3

~ 2C 3 20 f~ 4-O~0I-4~

7

/

12-31-cO 12-31-01 1Ž-31-02 12-31 -03 C -21 64 of 189

FIGURE C-2 (cont.)

Surface Water - Tritium - Station L-21 (C) and L-40 Collected in the Vicinity of LCS, 2005 - 2007 L-21 Illinois River at Seneca 10001 800 600--

(.

9 200 0o I

I I

I 03/31/05 10/17/05 05/05/06 11/21/06 06/09/07 12/26/07 L-40 Illinois River Downstream 1000 800 600 400 200

-J 0 i 03-31-05 10-17-05 05-05-06 11-21-06 06-09-07 12-26-07 DUE TO VENDOR CHANGE IN 2005, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE 2005 AND MDC VALUES AFTER JUNE 2005 C - 22 65 of 189

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 6.0 0

4,0 A 00 V 01 41401

'1. 31 -O 12-3 1 -Q1 12-3 1 02 L-03 Onsite No. 3 0

4,0 2,0 0,0 Q-.31-00

ý1

-11 1

23-3ý-02 12-31 -3 12-301J4 C - 23 66 of 189

FIGURE C-3 (cont.)

Air Particulates - Gross Beta - Stations L-01 and L-03 Collected in the Vicinity of LCS, 2005 - 2007 L-01 Nearsite No. 1 50.0 40.0 E 30.0 C.,

L 20.0 10.0 0.04 I

I I

I 01/06/05 07/07/05 01/05/06 07/06/06 01/04/07 07/05/07 01/03/08 L-03 Onsite No. 3 CL mU 40 50.0 40.0 30.0 20.0 10.0 0.0 4 I

I I

01-06-05 07-07-05 01-05-06 07-06-06 01-04-07 07-05-07 01-03-08 DUE TO VENDOR CHANGE IN 2005, THE REPORTED UNITS CHANGED FROM E-02 PCI/M3 TO E-03 PCI/M3 C - 24 67 of 189

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 8.0 13 kI 5!

4,0 12 -C-0 12.314*1 12-31 -02 1,2-31-03 t2-2,-04

-2.0 L-06 Nearsite No. 6 Uk 4;0 2ýO 12-31-01 12-31402 C - 25 68 of 189

FIGURE C-4 (cont.)

Air Particulates - Gross Beta - Stations L-05 and L-06 Collected in the Vicinity of LCS, 2005 - 2007 L-05 Onsite No. 5 50.0 40.0 3.300 CD) u* 20.0 10.0 0.0 I

I I

I 01-06-05 07-07-05 01-05-06 07-06-06 01-04-07 07-05-07 01-03-08 L-06 Nearsite No. 6 70.0 60.0 50.0 6 40.0 C.,

9 30.0 w

- 20.0 10.0 0.106 I

I I

I 0

0 01-06-05 07-07-05 01-05-06 07-06-06 01-04-07 07-05-07 01-03-08 DUE TO VENDOR CHANGE IN 2005, THE REPORTED UNITS CHANGED FROM E-02 PCI/M3 TO E-03 PCI/M3 C - 26 69 of 189

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

Collected in the Vicinity of LCS, 2000 - 2004 L-10 (C) Streator 100 8.0 2,0 0.0 CD14+01 I0 :-!+*

12+31 *1

2+21 -. 2 12*31*3D 43 C - 27 70 of 189

FIGURE C-5 (cont.)

Air Particulates - Gross Beta - Station L-10 (C)

Collected in the Vicinity of LCS, 2005 - 2007 L-1O (C) Streator 50.0 40.0 3 300-20.0 10.0 0.0 01-06-05 07-07-05 01-05-06 07-06-06 01-04-07 07-05-07 01-03-08 DUE TO VENDOR CHANGE IN 2005, THE REPORTED UNITS CHANGED FROM E-02 PCI/M3 TO E-03 PCI/M3 C-28 71 of 189

FIGURE C-6 Air Particulates - Gross Beta - Stations L-04 and L-07 Collected in the Vicinity of LCS, 2005 - 2007 L-04 Rte. 170 50.0 40.0 E

30.0 a.

20.0 1

10.0 0.0 07-07-05 01-05-06 07-06-06 01-04-07 07-05-07 01-03-08 L-07 Seneca 50.0 40.0 E

30.0

& 20.0 10.0 0.0 i 07-07-05 01-05-06 07-06-06 01-04-07 07-05-07 DUE TO VENDOR CHANGE IN 2005, 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 UNABLE TO COLLECT L-07 FROM 07/26/07 - 09/06/07 DUE TO ELECTRICAL PROBLEM C - 29 72 of 189

FIGURE C-7 Air Particulates - Gross Beta - Stations L-08 and L-1 1 Collected in the Vicinity of LCS, 2005 - 2007 L-08 Marseilles 50.0 40.0 E 30.0 C.)

9 20.0 0

10.0 0.04-07-07-05 01-05-06 07-06-06 01-04-07 07-05-07 01-03-08 L-1 1 Ransom E

C-)

0.

03 CL M

9 T-60.0 50.0 40.0 30.0 20.0-10.0 0.0 07-07-05 01-05-06 07-06-06 01-04-07 07-05-07 01-03-08 DUE TO VENDOR CHANGE IN 2005, 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 C-30 73 of 189

APPENDIX D INTER-LABORATORY COMPARISON PROGRAM 74 of 189

TABLE D-1 ANALYTICS ENVIRONMENTAL RADIOACTIVITY CROSS CHECK PROGRAM TELEDYNE BROWN ENGINEERING, 2007 (PAGE 1 OF 3)

Identification Reported Known Ratio (c)

Month/Year Number Matrix Nuclide Units Value (a)

Value (b)

TBE/Analytics Evaluation (d)

March 2007 E5255-396 Milk E5256-396 Milk E5258-396 AP Sr-89 Sr-90 1-131 Ce-141 Cr-51 Cs-1 34 Cs-1 37 Co-58 Mn-54 Fe-59 Zn-65 Co-60 Ce-141 Cr-51 Cs-1 34 Cs-1 37 Co-58 Mn-54 Fe-59 Zn-65 Co-60 pCi/L 125 pCi/L 10.8 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 107 269 244 98.1 227 92.5 182.0 108.0 985 143 252 204 74.9 190.0 79.7 156 99.1 894 122 E5257-396 Charcoal 1-131 pCi 34.7 pCi/L 98.3 pCi/L 16.1 137 10 85.2 297 245 112 234 98.8 182 106 1000 152 245 202 92.3 197.0 81.6 151 87.2 826 126 71.3 95.2 12.9 70.1 200 512 242 169 198 166 167 334 238 105 268 127 88.5 104.0 87 87.3 175 125 0.91 1.08 1.26 0.91 1.00 0.88 0.97 0.94 1.00 1.02 0.99 0.94 1.03 1.01 0.81 0.96 0.98 1.03 1.14 1.08 0.97 0.49 1.03 1.25 1.01 0.88 0.90 0.81 0.93 0.91 0.98 0.95 0.95 0.89 0.83 0.87 0.80 0.89 0.88 0.99 1.03 1.02 0.89 1.00 A

A W

A A

N (1)

June 2007 E5384-396 Milk E5385-396 Milk E5387-396 AP Sr-89 Sr-90 1-131 Ce-141 Cr-51 Cs-1 34 Cs-1 37 Co-58 Mn-54 Fe-59 Zn-65 Co-60 Ce-141 Cr-51 Cs-1 34 Cs-1 37 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 71.0 176 459 197 158 180 163 158 318 212 87.5 232 101 78.9 91.8 85.6 89.8 178 111 A

W A

A A

A E5386-396 Charcoal 1-131 pCi 79.3 79.1 D-I1.1 75 of 189

TABLE D-1 ANALYTICS ENVIRONMENTAL RADIOACTIVITY CROSS CHECK PROGRAM TELEDYNE BROWN ENGINEERING, 2007 (PAGE 2 OF 3)

Identification Reported Known Ratio (c)

Month/Year Number Matrix Nuclide Units Value (a)

Value (b)

TBE/Analytics Evaluation (d)

September 2007 E5492-396 Milk E5493-396 Milk E5495-396 AP Sr-89 Sr-90 1-131 Ce-141 Cr-51 Cs-1 34 Cs-1 37 Co-58 Mn-54 Fe-59 Zn-65 Co-60 Ce-141 Cr-51 Cs-1 34 Cs-137 Co-58 Mn-54 Fe-59 Zn-65 Co-60 pCi/L 99.0 94.9 pCi/L 13.9 13.1 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 pCi 81.9 200 271 131 131 114 171 117 212 143 128 181 85.9 83.2 69.4 112 79.6 159 92.0 85.2 211 289 147 131 114 168 111 202 148 136 186 94.7 83.9 73.3 108 71.1 130 95.2 E5494-396 Charcoal 1-131 70.8 69.5 1.04 1.06 0.96 0.95 0.94 0.89 1.00 1.00 1.02 1.05 1.05 0.97 0.94 0.97 0.91 0.99 0.95 1.04 1.12 1.22 0.97 1.02 0.93 1.02 1.00 0.97 0.97 0.85 1.00 0.91 1.00 1.01 0.99 0.94 0.95 1.04 0.93 1.01 0.98 1.07 1.21 1.11 0.97 December 2007 E5749-396 Milk E5750-396 Milk E5752-396 AP Sr-89 Sr-90 1-131 Ce-141 Cr-51 Cs-1 34 Cs-1 37 Co-58 Mn-54 Fe-59 Zn-65 Co-60 Ce-141 Cr-51 Cs-1 34 Cs-1 37 Co-58 Mn-54 Fe-59 Zn-65 Co-60 pCi/L 87.6 pCi/L 15.5 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 60.6 137 497 117 166 159 190 149 231 198 88.6 352 84.6 111 114 135 119 172 137 93.7 15.2 60.8 141 512 137 166 174 190 148 234 211 93.4 340 91.2 110.0 116.0 126 98.5 155 141 A

A A

A W

A A

D - 1.2 76 of 189

TABLE D-1 ANALYTICS ENVIRONMENTAL RADIOACTIVITY CROSS CHECK PROGRAM TELEDYNE BROWN ENGINEERING, 2007 (PAGE 3 OF 3)

Identification Reported Known Ratio (c)

Month/Year Number Matrix Nuclide Units Value (a)

Value (b)

TBE/Analytics Evaluation (d)

December2007 E5751-396 Charcoal 1-131 pCi 65.8 74.1 0.89 A

(1) New technician counted charcoal cartridge on the back rather than the face, resulting in low activity. If the charcoal cartridge had been counted on the face, the ratio would have been approximately 1.07, which is acceptable. NCR 07-02 (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 - 1.3 77 of 189

TABLE D-2 ERA ENVIRONMENTAL RADIOACTIVITY CROSS CHECK PROGRAM TELEDYNE BROWN ENGINEERING, 2007 (PAGE 1 OF 1)

Identification Reported Known Month/Year Number Media Nuclide Units Value (a)

Value (b)

Control Limits Evaluation (c)

July 2007 Rad 70 Water Sr-89 Sr-90 Ba-1 33 Cs-134 Cs-1 37 Co-60 Zn-65 Gr-A Gr-B 1-131 H-3 pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L 58.6 18.7 18.6 57.6 55.4 31.3 49.0 26.8 12 31.1 1700 58.2 19.0 19.4 68.9 61.3 33.5 54.6 27.1 11.5 26.5 1770 27.4 18.2 12.6 71.1 180 23.2 251 58.6 9.73 28.9 9700 49.5 - 66.9 10.3-27.7 10.7-28.1 60.2 - 77.6 52.6 - 70.0 24.8 - 42.2 45.2 - 64.0 15.4-38.8 2.84 - 20.2 21.3-31.7 1180-2360 19.3 - 33.9 12.9-21.6 8.64-15.5 58.0 - 78.2 162 - 200 19.9-28.3 226 - 294 30.6 - 72.9 4.26 - 18.2 24.0 - 33.8 8430-10700 A

A A

N (1)

A A

A October 2007 RAD 71 Water Sr-89 Sr-90 Ba-1 33 Cs-1 34 Cs-1 37 Co-60 Zn-65 Gr-A Gr-B 1-131 H-3 27.07 17.40 12.57 63.33 168 21.93 245.33 55.60 15.23 27.43 9263.3 A

A A

(1) The Cs-134 TBE found/ERA known ratio is 83.6%, which TBE considers acceptable. NCR 07-07 (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. N=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 - 1.4 78 of 189

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

TELEDYNE BROWN ENGINEERING, 2007 (PAGE 1 OF 1)

Identification Reported Known Acceptance Month/Year Number Media Nuclide Units Value (a)

Value (b)

Range Evaluation (c)

February 2007 07-MaW17 Water Cs-134 Cs-1 37 Co-57 Co-60 H-3 Mn-54 Sr-90 Zn-65 Bq/L Bq/L Bq/L Bq/L Bq/L Bq/L Bq/L Bq/L 74.5 162 140 27.9 346 125 8.90 117 83.5 163.0 143.7 26.9 283.0 123.8 8.87 114.8 58.5-108.6 114 211.9 100.6 - 186.8 18.8 - 35.0 198.1 - 367.9 86.7-160.9 6.21-11.53 80.4 - 149.2 07-GrW1 7 Water Gr-A Gr-B Bq/L 0.502 0.327

>0.0 - 0.654 Bq/L 0,975 0.851 0,426 - 1.277 07-MaS17 Soil 07-RdF17 AP Cs-1 34 Cs-137 Co-57 Co-60 Mn-54 K-40 Sr-90 Zn-65 Cs-1 34 Cs-1 37 Co-57 Co-60 Mn-54 Sr-90 Zn-65 Bq/kg Bq/kg Bq/kg Bq/kg Bq/kg Bq/kg Bq/kg Bq/kg Bq/sample Bq/sample Bq/sample Bq/sample Bq/sample Bq/sample Bq/sample 322 893 508.3 300.3 779 682 293 618.7 3.230 2.453 3.067 2.767 3.557 0.584 2.463 327.4 799.7 471.2 274.7 685.2 602 319.0 536.8 1.4960 2.5693 2.8876 2.9054 3.5185 0.6074 2.6828 229.2 - 425.6 559.8 - 1039.6 329.8 - 612.6 192.3 - 357.1 479.6 - 890.8 421 - 783 223.3 - 414.7 375.8 - 697.8 2.9372 - 5.4548 1.7985 - 3.3401 2.0213 - 3.7539 2.0338 - 3.7770 2.4630 - 4.5741 0.4252 - 0.7896 1.8780 - 3.4876 A

A A

A W

A A

A W

A A

W February 2007 07-GrF17 AP Gr-A Gr-B 07-RdV1 7 Vegetation Cs-1 34 Cs-1 37 Co-57 Co-60 Mn-54 K-40 Sr-90 Zn-65 Bq/sample 0.353 0.601

>0.0 - 1.202 Bq/sample 0.500 0.441 0.221 - 0.662 Bq/sample Bq/sample Bq/sample Bq/sample Bq/sample Bq/sample Bq/sample Bq/sample 6.207 7.80 8.64 6.10 9.41 63.5 1.51 7.15 6.2101 6.9949 8.1878 5.8215 8.4492 4.3471 - 8.0731 4.8964 - 9.0934 5.7315 - 10.6441 4.0751 - 7.5680 5.9144 - 10.9840 Not evaluated by MAPEP 1.5351 1.0746 - 1.9956 5.6991 3.9894 - 7.4088 (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 warning, N=not acceptable.

D-1.5 79 of 189

TABLE D-4 ERA(a) STATISTICAL

SUMMARY

PROFICIENCY TESTING PROGRAM ENVIRONMENTAL, INC., 2007 (Page 1 of 2)

Concentration (pCi/L)

Lab Code

Date Analysis Laboratory ERA Control Resultb Resultc Limits Acceptance STAP-1116 03/19/07 Gr. Alpha 34.64 +/- 2.56 STAP-1116 03/19/07 Gr. Beta 93.41 +/- 3.20 STAP-1l117 STAP-1117 STAP-1117 e STAP-1117 T STAP-1117 STAP-1117 STSO-1118 STSO-1118 STSO-1118 STSO-1118 STSO-1 118 STSO-1 118 STSO-1118 T STSO-1 118 STSO-1 118 STSO-1 118 STSO-1 118 STSO-1 118 t STVE-1119 STVE-1119 STVE-1119 STVE-1119 STVE-1119' STVE-1119 STVE-1119 STW-1 120 STW-1 120 STW-1 120 STW-1 120' STW-1 120 STW-1 120 03/19/07 03/19/07 03/19/07 03/19/07 03/19/07 03/19/07 03/19/07 03/19/07 03/19/07 03/19/07 03/19/07 03/19/07 03/19/07 03/19/07 03/19/07 03/19/07 03/19/07 03/19/07 03/19/07 03/19/07 03/19/07 03/19/07 03/19/07 03/19/07 03/19/07 03/19/07 03/19/07 03/19/07 03/19/07 03/19/07 03/19/07 Co-60 Cs-1 34 Cs-1 37 Mn-54 Sr-90 Zn-65 Ac-228 Bi-212 Co-60 Cs-134 Cs-1 37 K-40 Mn-54 Pb-212 Pb-214 Sr-90 Th-234 Zn-65 Co-60 Cs-134 Cs-137 K-40 Mn-54 Sr-90 Zn-65 Co-60 Cs-134 Cs-137 Mn-54 Sr-90 Zn-65 1610.00 +/- 8.40 1340.40 +/- 48.84 345.30 +/- 8.20

<5.0 156.10 +/- 6.60 363.80 +/- 11.90 3097.77 2467.87 7847.40 7910.60 4635.00 12201.60 2046.80 4142.80 6163.30 4329.40 0.00

+/- 94.96

+/- 114.33

+/- 86.60

+/- 356.88

+/- 99.10

+/- 423.20

< 34.0

+/- 127.20

+/- 110.40

+/- 791.60

+/- 569.10

+/- 0.00 25.8 79.5 1300.0 1120.0 255.0 0.0 156.0 245.0 2790.0 2500.0 7330.0 7560.0 4300.0 11100.0 0.0 1730.0 3330.0 7500.0 3590.0 0.0 2600.0 579.0 2920.0 37900.0 0.0 8890.0 366.0 536.0 1750.0 1850.0 0.0 989.0 1910.0 1010.0 - 1620 732.0 -1380 192.0 -336 66.6 - 246 208.0 -412 1790.0 -3930 658.0 - 3730 5340.0 - 9820 4850.0 - 9070 3290.0 - 5580 8050.0 - 15000 1120.0 -2430 1980.0 - 4980 2610.0 - 12400 2190.0 - 4560 0.0 - 0 1760.0 - 3720 308.0 - 822 2150.0 - 4060 27200.0 - 53600 4900.0 - 11800 267.0 - 500 467.0 - 631 1290.0 - 2020 1570.0 - 2220 630.0 - 1320 1600.0 - 2410 Pass Pass Fail 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 12.4 - 39 48.8-116 Pass Pass 2827.90 +/- 62.40 654.80 +/- 48.40 3307.30 +/- 58.80 40814.20 +/- 618.80

< 27.6 8999.70 +/- 580.90 474.30 +/- 45.70 541.40 +/- 9.00 1623.80 +/- 66.10 1839.10 +/- 17.90

< 8.1 949.40 +/- 16.70 2009.00 +/- 36.40 STW-1121 04/09/07 Sr-89 STW-1121 04/09/07 Sr-90 30.7 +/- 4.3 39.3 +/- 1.8 35.4 42.1 26.7 -44.1 33.4 -50.8 D - 1.6 80 of 189

TABLE D-4 ERA(B) STATISTICAL

SUMMARY

PROFICIENCY TESTING PROGRAM ENVIRONMENTAL, INC., 2007 (Page 2 of 2)

Concentration (pCi/L)

Lab Code

Date Analysis Laboratory ERA Control Resultb Resultc Limits Acceptance STW-1122 04/09/07 Ba-133 30.0 +/- 2.4 29.3 20.6 -38.0 Pass STW-1122 04/09/07 Co-60 118.5 +/- 3.9 119.0 109.0 - 129.0 Pass STW-1122 04/09/07 Cs-134 52.6 +/- 2.3 54.3 45.6 -63.0 Pass STW-1122 04/09/07 Cs-137 49.5 +/- 3.8 50.3 41.6 -59.0 Pass STW-1122 04/09/07 Zn-65 91.7 +/- 6.3 88.6 73.3-104.0 Pass STW-1123 04/09/07 Gr. Alpha 33.8 +/- 3.5 56.5 32.0-81.0 Pass STW-1123 04/09/07 Gr. Beta 24.2 +/- 2.3 25.3 16.6 -34.0 Pass STW-1124 04/09/07 1-131 19.2 +/- 1.2 18.9 13.7 -24.1 Pass STW-1 125 04/09/07 H-3 7540.0 +/- 255.0 8060.0 6660.0 - 9450.0 Pass STW-1127 07/09/07 Sr-89 51.7 +/- 5.0 58.2 49.5 -66.9 Pass STW-1127 07/09/07 Sr-90 21.4 +/- 2.3 19.0 10.3 -27.7 Pass STW-1128 07/09/07 Ba-133 19.4 +/- 2.2 19.4 10.7 -28.1 Pass STW-1128 07/09/07 Co-60 32.8 +/- 2.0 33.5 24.8 -42.2 Pass STW-1128 07/09/07 Cs-134 67.0 +/- 2.9 68.9 60.2 -77.6 Pass STW-1128 07/09/07 Cs-137 61.6 +/- 3.8 61.3 52.6 -70.0 Pass STW-1 128 07/09/07 Zn-65 55.6 +/- 7.5 54.6 45.2 - 64.0 Pass STW-1129 07/09/07 Gr. Alpha 19.2 +/- 1.6 27.1 15.4-38.8 Pass STW-1129 07/09/07 Gr. Beta 9.1 +/- 0.9 11.5 2.8 -20.2 Pass STW-1131 10/05/07 Sr-89 27.3 +/- 3.3 27.4 19.3 -33.9 Pass STW-1131 10/05/07 Sr-90 17.7 +/- 1.2 18.2 12.9 -21.6 Pass STW-1 132 10/05/07 Ba-133 12.2 +/- 3.3 12.6 8.6 - 15.5 Pass STW-1132 10/05/07 Co-60 23.8 +/- 1.4 23.2 19.9 -28.3 Pass STW-1132 10/05/07 Cs-134 70.5 +/- 4.2 71.1 58.0 -78.2 Pass STW-1132 10/05/07 Cs-137 178.2 +/- 3.3 180.0 162.0 - 200.0 Pass STW-1132 10/05/07 Zn-65 263.9 +/- 6.9 251.0 226.0 - 294.0 Pass STW-1 133 10/05/07 Gr. Alpha 54.7 +/- 2.1 58.6 30.6 - 72.9 Pass STW-1133 10/05/07 Gr. Beta 11.9 +/- 0.9 9.7 4.3-18.2 Pass STW-1134 10/05/07 1-131 33.0 +/- 1.5 28.9 24.0 -33.8 Pass STW-1 135 10/05/07 H-3 9965.0 +/- 250.0 9700.0 8430.0 - 10700.0 Pass Laboratory codes as follows: STW (water), STAP (air filter), STSO (soil), STVE (vegetation).

a Results obtained by Environmental, Inc., Midwest Laboratory as a participant in the crosscheck program for proficiency testing administered by Environmental Resources Associates, serving as a replacement for studies conducted previously by the Environmental Measurements Laboratory Quality Assessment Program (EML).

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

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

e A high bias (- 20%) was observed in gamma results for air filters. A composite filter geometry was used in the calculations vs. a single filter geometry. Result of recalculation. Cs-1 37, 305.8 +/- 6.0 pCi/filter.

f Included in the testing series as a "false positive". No activity expected.

D - 1.7 81 of 189

TABLE D-5 DOE'S MIXED ANALYTE PERFORMANCE EVALUATION PROGRAM (MAPEP)a ENVIRONMENTAL, INC., 2007 (Page 1 of 1)

Concentration b Lab Codec STW-1110 STW-1110 STW-1111 STW-1111 STW-1111 STW-1111 STW-1111 STW-1 111 STW-1 111 STSO-1 112 STSO-1 112 STSO-1 112 STSO-1 112 STSO-1 112 Date 01/01/07 01/01/07 01/01/07 01/01/07 01/01/07 01/01/07 01/01/07 01/01/07 01/01/07 01/01/07 01/01/07 01/01/07 01/01/07 01/01/07 Analysis Gr. Alpha Gr. Beta Co-57 Cs-134 Cs-137 H-3 Mn-54 Sr-90 Zn-65 Co-57 Co-60 Cs-134 Cs-137 Mn-54 Laboratory result 0.45 +/- 0.08 0.90 +/- 0.14 151.60 79.20 168.70 262.20 130.60 9.60 123.70 501.20 285.90 325.90 855.70 750.90

+/- 10.00

+/- 8.00

+/- 12.10

+/- 9.10

+/- 11.50

+/- 1.40

+/- 17.00

+/- 2.90

+/- 2.10

+/- 7.40

+/- 4.60

+/- 4.70 Known Activity 0.33 0.85 143.70 83.50 163.00 283.00 123.80 8.87 114.80 471.20 274.70 327.40 799.70 685.20 Control Limits d 0.00 -0.65 0.43-1.28 100.60 -186.1 58.50 -108.1 114.10 -211.!

198.10 -367.

86.70 -160.

6.21 -11.5:

80.40 -149.:

Acceptance Pass Pass 80 60 90 90 90 3

20 329.80 - 612.60 192.30 - 357.10 229.20 - 425.60 559.80 - 1039.60 479.60 - 890.80 STAP-1113 01/01/07 Gr. Alpha STAP-1113 01/01/07 Gr. Beta 0.27 +/- 0.04 0.57 +/- 0.05 STAP-1 114 STAP-1 114 STAP-1 114 STAP-1 114 STAP-1 114 STAP-1 114 STAP-1 114 STVE-1115 STVE-1115 STVE-1115 STVE-1115 STVE-1115 01/01/07 01/01/07 01/01/07 01/01/07 01/01/07 01/01/07 01/01/07 01/01/07 01/01/07 01/01/07 01/01/07 01/01/07 Co-57 Co-60 Cs-134 Cs-137 Mn-54 Sr-90 Zn-65 Co-57 Co-60 Cs-134 Cs-137 Mn-54 3.51 2.98 4.02 2.75 3.94 0.58 2.70 8.90 6.50 6.90 8.20 10.10

+/- 0.07

+/- 0.10

+/- 0.16

+/- 0.12

+/- 0.18

+/- 0.10

+/- 0.20

+/- 0.30

+/- 0.30 0.60 0.44 2.89 2.91 4.20 2.57 3.52 0.61 2.68 8.19 5.82 6.21 6.99 8.46 0.00-1.20 0.22 -0.66 2.02 -3.75 2.03 -3.78 2.94 -5.45 1.80 -3.34 2.46 -4.57 0.43 -0.79 1.88 -3.49 5.73 -10.64 4.08 -7.57 4.35 -8.07 4.90 -9.09 5.91 -10.98 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 a 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).

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.

D-1.8 82 of 189

APPENDIX E EFFLUENT DATA 83 of 189

TABLE OF CONTENTS IN T

R O

D U

C T

ION........................................................... 1

SUMMARY

2 1.0. EFFLUENTS...........................................................................

3

1. 1. Gaseous Effluents to the Atmosphere......................................

3 1.2. Liquids Released to Illinois River............................................

3 2.0. SOLID RADIOACTIVE WASTE.....................................................

3 3.0. DOSE TO MAN........................................................................

3 3.1. Gaseous Effluent Pathways..................................................

3 3.1.1. Noble Gases.........................................................

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

5 3.1.2. 1. Dose to Thyroid...........................................

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

5 3.3. Assessment of Dose to Member of Public.................................. 5 4.0. SITE METEOROLOGY...............................................................

6 84 of 189'

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 85 of 189

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, while no longer released from LaSalle County Station, were designed to be released to the Illinois River in controlled batches after radioassay of each batch. Gaseous effluents are released to the atmosphere after delay 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 and tritium 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, tritium, 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.

1 86 of 189

SUMMARY

Gaseous effluents for the period contributed to only a small fraction of the LaSalle County Station Technical Specification limits. Liquid effluents had no contribution to offsite dose, as no liquid radioactive discharges were conducted.

Calculations of environmental concentrations based on effluent, Illinois River flow, and meteorological data for the period indicate that consumption by the public of radionuclides attributable to LaSalle County Station does not exceed regulatory limits.

Radiation exposure from radionuclides releases to the atmosphere represented the critical pathway for the period with a maximum individual total dose estimated to be 1.47E-01 mremn 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 1ll, Section 7.0.

The results of analysis confirm that the station is operating in compliance with 1lOCFR50 Appendix 1, 100CFR20 and 4OCFR1 90.

2 87 of 189

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 2.63E+03 curies of fission and activation gases were released with a maximum quarterly average release rate of 8.34E+01pCi/sec.

A total of 8.01E-02 curies of 1-131 was released during the year with a maximum quarterly release rate of 2.54E-03 pCi/sec.

A total of 4.06E-02 curies of beta-gamma emitters was released as airborne particulate matter with a maximum quarterly average release rate of 1.29E-03 pCi/sec.

Alpha-emitting radionuclides were below the lower limit of detection (LLD).

A total of 9.52E+01 curies of tritium was released with a maximum quarterly average release rate of 3.02E+00 pCi/sec.

1.2 Liquids Released to Illinois River There were no liquid batch releases in 2007. 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 2007 Radioactive Effluent Release Report. The submittal date of this report was April 30, 2008.

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

3.1.1NolGae 3.1.1.1 Gamma Dose Rates Unit 1 and Unit 2 gaseous releases at LaSalle 3

88 of 189

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.

Based on measured effluents and meteorological data, the maximum total body dose to an individual would be 3.79E-02 mrem (Table 3.1-1) for the year, with an occupancy or shielding factor of 0.7 included. The maximum total body dose based on measured effluents and concurrent meteorological data would be 2.43E-02 mrem. (Table 3.4-1).

The maximum gamma air dose was 5.02E-02 mrad (Table 3.1-1) and 6.47E-02 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/cm2 and an occupancy factor of 1.0 is used. The skin dose from beta and gamma radiation for the year was 3.98E-02 (Table 3.1-1) and 2.87E-02 mrem (Table 3.4-1) based on concurrent meteorological data.

The maximum offsite beta dose for the year was 1.43E-03 mrad (Table 3.1-1) and 6.OOE-03 mrad (Table 3.4-1) based on concurrent meteorological data.

4 89 of 189

3.1.2 Radioactive Iodine The human thyroid exhibits a significant capacity to concentrate ingested or inhaled iodine.

The radioiodine, 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 1.47E-01 mrem (child) for the year (Table 3.1-1).

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

Not all of these pathways are significant or applicable at a given time but a reasonable approximation of the dose can be made by adjusting the dose formula for season of the year or type and degree of use of the aquatic environment.

NRC developed equations* were used to calculate the doses to the whole body, lower gastro-intestinal tracts, thyroid, bone and skin; specific parameters for use in the equations are given in the Offsite Dose Calculation Manual. The maximum whole body dose was 0.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, 2007, 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 5

90 of 189

radioactive materials in liquid effluents from each reactor unit (1.5 mrem to the whole body or 5 mrem to any organ during any calendar year; 3 mrem to the whole body or 10 mrem to any organ during the calendar year).

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

The RETS limits on dose to a member of the public due to iodine-131, iodine-133,

tritium, and radionuclides in particulate form with half-lives greater than eight days in gaseous effluents released from each reactor unit (7.5 mrem to any organ during any calendar quarter; 15 mrem to any organ during any calendar year).

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

4.0 SITE METEOROLOGY A summary of the site meteorological measurements taken during each calendar quarter of the year is given in Appendix 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 99.7% during 2007 (Table 3.4-1).

Nuclear Regulatory Commission, Regulatory Guide 1.109 (Rev. 1) 6 91 of 189

APPENDIX E-1 DATA TABLES AND FIGURES E-1.1 92 of 189

Table 1.1-1 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2007)

UNITS ONE AND TWO DOCKET NUMBERS 50-373 AND 50-374 GASEOUS EFFLUENTS-SUMMATION OF ALL RELEASES I Units I

I st Qtr I

2nd Qtr I

3rd Qtr Estimated 4th Qtr Total Error %

A. Fission and Activation Gas Releases

1. Total Release Activity Ci 6.23E+02 6.60E+02 6.26E+02 7.19E+02 3.50E+01

2. Average Release Rate ti Ci/sec 8.01E+01 8.40E+01 7.87E+01 9.04E+01

3. Percent of Technical Specification Limit B. Iodine Releases

1. Total 1-131 Activity Ci 1.56E-02 1.90E-02 2.76E-02 1.79E-02 3.50E+01

2. Average Release Rate uCi/sec 2.caE-03 2.42E-03 3.47E-03 2.26E-03

3. Percent of Technical Specification Limit C. Particulate (> 8 day half-life) Releases

1. Gross Activity Ci 3.07-02 3.05E-03 3.75E-03 3.14E-03 3.30E+01

2. Average Release Rate uCi/sec 3.94E-04 3.87E-04 4.71E-04 3.95E-04

3. Percent of Technical Specification Limit

3. Gross Alpha Activity Ci

<1.00E-I1

<1.00E-11

<I.OOE-11

<1.OOE-11 D. Tritium Releases

1. Total Release Activity Ci 2.27E+01 2.17E+01 2.21E+01 2.87E+01 2.1OE+OI

2. Average Release Rate uCi/sec 2.92E+00 2.76E+00 2.78E+00 3c61+00 A3v Percent of Technical Specification 6

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 93 of 189

Table 1.2-1 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2007)

LIQUID RELEASES UNIT I and UNIT 2 SUMMATION OF ALL LIQUID RELEASES Estimated 3rd Qtr I 4th Qtr Total Error %

I Units I

1st Qtr I 2nd Qtr I A. Fission and Activation Products

1. Total Activity Released Ci

<LLD

<LLD 5.08E-03 N/A

2. Average Concentration Released uCi/ml

<LLD

<LLD 8.02E-08

3. Percent of Applicable Limit B. Tritium I. Total Activity Released Ci

<LLD

<LLD N/A

2. Average Concentration Released uCi/mI

<LLD

3. Percent of Applicable Limit C. Dissolved Noble Gases

1. Total Activity Released Ci

<LLD

<LLD N/A

2. Average Concentration Released uCi/mI

<LLD

3. Percent of Applicable Limit D. Gross Alpha

1. Total Activity Released (estimate)

Ci

<LLD

<LLD N/A

2. Average Concentration Released uCi/mI

<LLD

3. Percent of Applicable Limit IE. Volume of Liquid Waste to Discharge liters 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 N/A IF. Volume of Dilution Water liters O.OOE+0O 0.OOE+00 0.OOE+00 0.OOE+00 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/ml E - 1.3 94 of 189

Table 2.1-1 SOLID RADWASTE ANNUAL REPORT LaSalle County Station Table 2.1-1 deliberately deleted. For solid waste disposal detail, refer to the LaSalle County Station 2007 Effluent Report.

E - 1.4 95 of 189

Table 3.1-1 LASALLE STATION UNIT ONE ACTUAL 2007 MAXIMUM DOSES RESULTING FROM AIRBORNE RELEASES PERIOD OF RELEASE -

01/01/07 TO 12/31/07 CALCULATED 03/24/08 INFANT RECEPTOR 1ST 2ND 3RD 4TH TYPE QUARTER QUARTER QUARTER QUARTER ANNUAL JAN-MAR APR-JUN JUL-SEP OCT-DEC GAMMA AIR 1.22E-02 1.27E-02 1.07E-02 1.45E-02 5.02E-02 (MRAD)

(WSW )

(WSW

)

(WSW

)

(WSW )

(WSW)

BETA AIR 3.63E-04 3.57E-04 3.25E-04 3.81E-04 1.43E-03 (MRAD)

(ESE )

(ESE)

TOT.

BODY 9.20E-03 9.63E-03 8.12E-03 1.10E-02 3.79E-02 (MREM)

(WSW )

(WSW

)

(WSW

)

(WSW )

(WSW)

SKIN 9.65E-03 1.01E-02 8.52E-03 1.15E-02 3.98E-02 (MREM)

(WSW )

(WSW

)

(WSW

)

(WSW )

(WSW)

ORGAN 2.32E-03 3.78E-02 6.94E-02 2.17E-02 1.31E-01 (MREM)

(ESE )

THYROID THYROID THYROID THYROID THYROID THIS IS A REPORT FOR THE CALENDAR YEAR 2007 COMPLIANCE STATUS -

10CFR 50 APP.

I INFANT RECEPTOR

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

QTRLY 1ST QTR 2ND QTR 3RD QTR 4TH QTR YRLY

% OF OBJ JAN-MAR APR-JUN JUL-SEP OCT-DEC OBJ APP.

I GAMMA AIR (MRAD) 5.0 0.24 0.25 0.21 0.29 10.0 0.50 BETA AIR (MRAD) 10.0 0.00 0.00 0.00 0.00 20.0 0.01 TOT.

BODY (MREM) 2.5 0.37 0.39 0.32 0.44 5.0 0.76 SKIN (MREM) 7.5 0.13 0.13 0.11 0.15 15.0 0.27 ORGAN (MREM) 7.5 0.03 0.50 0.93 0.29 15.0 0.87 THYROID THYROID THYROID THYROID THYROID RESULTS BASED UPON:

ODCM ANNEX REVISION 3.0 MAY 2001 ODCM SOFTWARE VERSION 1.1 January 1995 ODCM DATABASE VERSION 1.1 January 1995 E - 1.5 96 of 189

Table 3.1-1 (continued)

LASALLE STATION UNIT ONE ACTUAL 2007 MAXIMUM DOSES RESULTING FROM AIRBORNE RELEASES PERIOD OF RELEASE -

01/01/07 TO 12/31/07 CALCULATED 03/24/08 CHILD RECEPTOR 1ST 2ND 3RD 4TH TYPE QUARTER QUARTER QUARTER QUARTER ANNUAL JAN-MAR APR-JUN JUL-SEP OCT-DEC GAMMA AIR 1.22E-02 1.27E-02 1.07E-02 1.45E-02 5.02E-02 (MRAD)

(WSW

)

(WSW

)

(WSW )

(WSW

)

(WSW)

BETA AIR 3.63E-04 3.57E-04 3.25E-04 3.81E-04 1.43E-03 (MRAD)

(ESE )

TOT.

BODY 9.20E-03 9.63E-03 8.12E-03 1.10E-02 3.79E-02 (MREM)

(WSW

)

(WSW )

(WSW

)

(WSW

)

(WSW)

SKIN 9.65E-03 1.01E-02 8.52E-03 1.15E-02 3.98E-02 (MREM)

(WSW

)

(WSW )

(WSW

)

(WSW

)

(WSW)

ORGAN 1.94E-03 4.22E-02 7.71E-02 2.63E-02 1.47E-01 (MREM)

(NNE )

(NNE

)

(NNE )

(NNE)

THYROID THYROID THYROID THYROID THYROID THIS IS A REPORT FOR THE CALENDAR YEAR 2007 COMPLIANCE STATUS -

10CFR 50 APP.

I CHILD RECEPTOR

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

QTRLY 1ST QTR 2ND QTR 3RD QTR 4TH QTR YRLY

% OF OBJ JAN-MAR APR-JUN JUL-SEP OCT-DEC OBJ APP.

I GAMMA AIR (MRAD) 5.0 0.24 0.25 0.21 0.29 10.0 0.50 BETA AIR (MRAD) 10.0 0.00 0.00 0.00 0.00 20.0 0.01 TOT.

BODY (MREM) 2.5 0.37 0.39 0.32 0.44 5.0 0.76 SKIN (MREM) 7.5 0.13 0.13 0.11 0.15 15.0 0.27 ORGAN (MREM) 7.5 0.03 0.56 1.03 0.35 15.0 0.98 THYROID THYROID THYROID THYROID THYROID RESULTS BASED UPON:

ODCM ANNEX REVISION 3.0 MAY 2001 ODCM SOFTWARE VERSION 1.1 January 1995 ODCM DATABASE VERSION 1.1 January 1995 E-1.6 97 of 189

Table 3.1-1 (continued)

LASALLE STATION UNIT ONE ACTUAL 2007 MAXIMUM DOSES RESULTING FROM AIRBORNE RELEASES PERIOD OF RELEASE 01/01/07 TO 12/31/07 CALCULATED 03/24/08 TEENAGER RECEPTOR 1ST 2ND 3RD 4TH TYPE QUARTER QUARTER QUARTER QUARTER ANNUAL JAN-MAR APR-JUN JUL-SEP OCT-DEC GAMMA AIR 1.22E-02 1.27E-02 1.07E-02 1.45E-02 5.02E-02 (MRAD)

(WSW )

(WSW

)

(WSW )

(WSW)

BETA AIR 3.63E-04 3.57E-04 3.25E-04 3.81E-04 1.43E-03 (MRAD)

(ESE )

TOT.

BODY 9.20E-03 9.63E-03 8.12E-03 1.10E-02 3.79E-02 (MREM)

(WSW )

(WSW

)

(WSW )

(WSW)

SKIN 9.65E-03 1.01E-02 8.52E-03 1.15E-02 3.98E-02 (MREM)

(WSW )

(WSW

)

(WSW )

(WSW)

ORGAN 1.44E-03 2.60E-02 4.73E-02 1.64E-02 9.12E-02 (MREM)

(NNE )

(NNE

)

(NNE )

(NNE)

THYROID THYROID THYROID THYROID THYROID THIS IS A REPORT FOR THE CALENDAR YEAR 2007 COMPLIANCE STATUS -

10CFR 50 APP.

I TEENAGER RECEPTOR

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

QTRLY 1ST QTR 2ND QTR 3RD QTR 4TH QTR YRLY

% OF OBJ JAN-MAR APR-JUN JUL-SEP OCT-DEC OBJ APP.

I GAMMA AIR (MRAD) 5.0 0.24 0.25 0.21 0.29 10.0 0.50 BETA AIR (MRAD) 10.0 0.00 0.00 0.00 0.00 20.0 0.01 TOT.

BODY (MREM) 2.5 0.37 0.39 0.32 0.44 5.0 0.76 SKIN (MREM) 7.5 0.13 0.13 0.11 0.15 15.0 0.27 ORGAN (MREM) 7.5 0.02 0.35 0.63 0.22 15.0 0.61 THYROID THYROID THYROID THYROID THYROID RESULTS BASED UPON:

ODCM ANNEX REVISION 3.0 MAY 2001 ODCM SOFTWARE VERSION 1.1 January 1995 ODCM DATABASE VERSION 1.1 January 1995 E - 1.7 98 of 189

Table 3.1-1 (continued)

LASALLE STATION UNIT ONE ACTUAL 2007 MAXIMUM DOSES RESULTING FROM AIRBORNE RELEASES PERIOD OF RELEASE -

01/01/07 TO 12/31/07 CALCULATED 03/24/08 ADULT RECEPTOR 1ST 2ND 3RD 4TH TYPE QUARTER QUARTER QUARTER QUARTER ANNUAL JAN-MAR APR-JUN JUL-SEP OCT-DEC GAMMA AIR 1.22E-02 1.27E-02 1.07E-02 1.45E-02 5.02E-02 (MRAD)

(WSW )

(WSW

)

(WSW )

(WSW

)

(WSW)

BETA AIR 3.63E-04 3.57E-04 3.25E-04 3.81E-04 1.43E-03 (MRAD)

(ESE )

TOT.

BODY 9.20E-03 9.63E-03 8.12E-03 1.10E-02 3.79E-02 (MREM)

(WSW )

(WSW

)

(WSW )

(WSW)

SKIN 9.65E-03 1.01E-02 8.52E-03 1.15E-02 3.98E-02 (MREM)

(WSW )

(WSW

)

(WSW )

(WSW)

ORGAN 1.58E-03 2.67E-02 4.85E-02 1.67E-02 9.35E-02 (MREM)

(NNE )

(NNE

)

(NNE )

(NNE)

THYROID THYROID THYROID THYROID THYROID THIS IS A REPORT FOR THE CALENDAR YEAR 2007 COMPLIANCE STATUS -

10CFR 50 APP.

I ADULT RECEPTOR

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

QTRLY 1ST QTR 2ND QTR 3RD QTR 4TH QTR YRLY

% OF OBJ JAN-MAR APR-JUN JUL-SEP OCT-DEC OBJ APP.

I GAMMA AIR (MRAD) 5.0 0.24 0.25 0.21 0.29 10.0 0.50 BETA AIR (MRAD) 10.0 0.00 0.00 0.00 0.00 20.0 0.01 TOT.

BODY (MREM) 2.5 0.37 0.39 0.32 0.44 5.0 0.76 SKIN (MREM) 7.5 0.13 0.13 0.11 0.15 15.0 0.27 ORGAN (MREM) 7.5 0.02 0.36 0.65 0.22 15.0 0.62 THYROID THYROID THYROID THYROID THYROID RESULTS BASED UPON:

ODCM ANNEX REVISION 3.0 MAY 2001 ODCM SOFTWARE VERSION 1.1 January 1995 ODCM DATABASE VERSION 1.1 January 1995 E - 1.8 99 of 189

Table 3.2-1 LASALLE STATION UNIT ONE MAXIMUM DOSES (MREM)

RESULTING FROM AQUATIC EFFLUENTS PERIOD OF RELEASE -

01/01/07 TO 12/31/07 CALCULATED 03/24/08 INFANT RECEPTOR DOSE TYPE TOTAL BODY INTERNAL ORGAN 1ST QUARTER JAN-MAR 2ND QUARTER APR-JUN 3RD QUARTER JUL-SEP 4TH QUARTER OCT-DEC ANNUAL 0.00E+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 THIS IS A REPORT FOR THE CALENDAR YEAR 2007 COMPLIANCE STATUS -

10 CFR 50 APP.

I

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

QTRLY 1ST QTR 2ND QTR 3RD QTR 4TH QTR YRLY

% OF OBJ JAN-MAR APR-JUN JUL-SEP OCT-DEC OBJ APP.

I TOTAL 0.00 CRIT.

0.00 BODY (MREM) 1.5 ORGAN(MREM) 5.0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 3.0 10.0 RESULTS BASED UPON:

ODCM ANNEX REVISION 3.0 MAY 2001 ODCM SOFTWARE VERSION 1.1 January 1995 ODCM DATABASE VERSION 1.1 January 1995 E - 1.9 100 of 189

Table 3.2-1 (continued)

LASALLE STATION UNIT ONE ACTUAL 2007 MAXIMUM DOSES (MREM)

RESULTING FROM AQUATIC EFFLUENTS PERIOD OF RELEASE -

01/01/07 TO 12/31/07 CALCULATED 03/24/08 CHILD RECEPTOR DOSE TYPE TOTAL BODY INTERNAL ORGAN 1ST QUARTER JAN-MAR 2ND QUARTER APR-JUN 3RD QUARTER JUL-SEP 4TH QUARTER OCT-DEC ANNUAL 0.OOE+00 0.00E+00 0.OOE+00 0.00E+00 0.OOE+00 0.OOE+00 0.00E+00 0.OOE+00 0.OOE+00 0.OOE+00 THIS IS A REPORT FOR THE CALENDAR YEAR 2007 COMPLIANCE STATUS -

10 CFR 50 APP.

I

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

QTRLY 1ST QTR 2ND QTR 3RD QTR 4TH QTR YRLY

% OF OBJ JAN-MAR APR-JUN JUL-SEP OCT-DEC OBJ APP.

I TOTAL BODY (MREM) 1.5 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 3.0 10.0 CRIT.

0.00 ORGAN(MREM) 5.0 RESULTS BASED UPON:

ODCM ODCM ODCM ANNEX REVISION SOFTWARE VERSION DATABASE VERSION 3.0 MAY 2001 1.1 January 1995 1.1 January 1995 E - 1.10 101 of 189

Table 3.2-1 (continued)

LASALLE STATION UNIT ONE ACTUAL 2007 MAXIMUM DOSES (MREM)

RESULTING FROM AQUATIC EFFLUENTS PERIOD OF RELEASE -

01/01/07 TO 12/31/07 CALCULATED 03/24/08 TEENAGER RECEPTOR DOSE TYPE TOTAL BODY INTERNAL ORGAN 1ST QUARTER JAN-MAR 2ND QUARTER APR-JUN 3RD QUARTER JUL-SEP 4TH QUARTER OCT-DEC ANNUAL 0.OOE+00 0.OOE+00 0.OOE+00 0.00E+00 0.00E+00 0.00E+00 0.OOE+00 0.00E+00 0.00E+00 0.OOE+00 THIS IS A REPORT FOR THE CALENDAR YEAR 2007 COMPLIANCE STATUS -

10 CFR 50 APP.

I

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

QTRLY 1ST QTR 2ND QTR 3RD QTR 4TH QTR YRLY

% OF OBJ JAN-MAR APR-JUN JUL-SEP OCT-DEC OBJ APP.

I TOTAL BODY (MREM) 1.5 0.00 CRIT.

ORGAN(MREM) 5.0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 3.0 10.0 RESULTS BASED UPON:

ODCM ODCM ODCM ANNEX REVISION SOFTWARE VERSION DATABASE VERSION 3.0 MAY 2001 1.1 January 1995 1.1 January 1995 E -1.ll 102 of 189

Table 3.2-1 (continued)

LASALLE STATION UNIT ONE ACTUAL 2007 MAXIMUM DOSES (MREM)

RESULTING FROM AQUATIC EFFLUENTS PERIOD OF RELEASE -

01/01/07 TO 12/31/07 CALCULATED 03/24/08 ADULT RECEPTOR DOSE TYPE TOTAL BODY INTERNAL ORGAN 1ST QUARTER JAN-MAR 2ND QUARTER APR-JUN 3RD QUARTER JUL-SEP 4TH QUARTER OCT-DEC ANNUAL 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 THIS IS A REPORT FOR THE CALENDAR YEAR 2007 COMPLIANCE STATUS -

10 CFR 50 APP.

I

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

QTRLY 1ST QTR 2ND QTR 3RD QTR 4TH QTR YRLY

% OF OBJ JAN-MAR APR-JUN JUL-SEP OCT-DEC OBJ APP.

I TOTAL 0.00 CRIT.

0.00 BODY (MREM) 1.5 ORGAN(MREM) 5.0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 3.0 10.0 RESULTS BASED UPON:

ODCM ODCM ODCM ANNEX REVISION SOFTWARE VERSION DATABASE VERSION 3.0 MAY 2001 1.1 January 1995 1.1 January 1995 E - 1.12 103 of 189

Table 3.3-1 LASALLE STATION UNIT ONE 10 CFR 20 COMPLIANCE ASSESSMENT PERIOD OF ASSESSMENT 01/01/07 TO 12/31/07 CALCULATED 03/24/08

1.

10 CFR 20.1301 (a) (1) Compliance Total Effective Dose Eqivalent, mrem/yr 10 CFR 20.1301 (a) (1) limit mrem/yr

3. 95E-01 100.0 0.39

% of limit Compliance Summary -

10CFR20 1st Qtr 2nd Qtr 3rd Qtr 4th Qtr

% of Limit 0.39 TEDE 9.79E-02 9.95E-02 1.01E-01 9.66E-02 RESULTS BASED UPON:

ODCM ODCM ODCM ANNEX REVISION SOFTWARE VERSION DATABASE VERSION 3.0 MAY 2001 1.1 January 1995 1.1 January 1995 E - 1.13 104 of 189

Table 3.3-1 (continued)

LASALLE STATION UNIT ONE 10 CFR 20 COMPLIANCE ASSESSMENT PERIOD OF ASSESSMENT 01/01/07 TO 12/31/07 CALCULATED 03/24/08

2.

10 CFR.20.1301 (d)/40 CFR 190 Compliance Dose (mrem)

Limit

% of (mrem)

Limit Whole Body (DDE)

Plume Skysh Groun 3.79E-02 ine 3.43E-01 d

7.25E-04 Total 3.82E-01 id 8.22E-02 s

1.08E-02 t

1.08E-02 1.08E-02 25.0 1.53 Organ Dose (CDE)

Thyro Gonad Breas Lung 75.0 0.11 25.0 0.04 Marrow Bone Remainder CEDE TEDE

1. 08E-02

1. 09E-02 1.30E-02

3. 95E-01 25.0 25.0 25.0 25.0 25.0 100.0 0.04 0.04 0.04 0.04 0.04 0.39 RESULTS BASED UPON:

ODCM ODCM ODCM ANNEX REVISION 3.0 MAY 2001 SOFTWARE VERSION 1.1 January 1995 DATABASE VERSION 1.1 January 1995 E - 1.14 105 of 189

Table 3.3-1 (continued)

LASALLE STATION UNIT TWO 10 CFR 20 COMPLIANCE ASSESSMENT PERIOD OF ASSESSMENT 01/01/07 TO 12/31/07 CALCULATED 03/24/08

1.

10 CFR 20.1301 (a) (1) Compliance Total Effective Dose Eqivalent, mrem/yr

3. 31E-01 10 CFR 20.1301 (a) (1) limit mrem/yr 100.0 0.33

% of limit Compliance Summary -

10CFR20 Ist Qtr 2nd Qtr 3rd Qtr 4th Qtr

% of Limit 0.33 TEDE 6.50E-02 8.85E-02 8.76E-02 9.02E-02 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 - 1.15 106 of 189

Table 3.3-1 (continued)

LASALLE STATION UNIT TWO 10 CFR 20 COMPLIANCE ASSESSMENT PERIOD OF ASSESSMENT 01/01/07 TO 12/31/07 CALCULATED 03/24/08

2.

10 CFR 20.1301 (d)/40 CFR 190 Compliance Dose Limit

% of (mrem)

(mrem)

Limit Whole Body (DDE)

Plume Skyshi Grounc 0. OOE+00 ne 3.31E-01 i

0.OOE+00 Total 3.31E-01 id 0.OOE+00 0.OOE+00 0.OOE+00 0.00E+00 0.OOE+00 Organ Dose (CDE)

Thyroi Gonads Breast Lung Marrow 25.0 75.0 25.0 25.0 25.0 25.0 1.33 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.33 Bone Remainder CEDE TEDE 0.OOE+00 25.0 0.00E+00 0.OOE+00 3.31E-01 25.0 100.0 RESULTS BASED UPON: ODCM ODCM ODCM ANNEX REVISION 3.0 MAY 2001 SOFTWARE VERSION 1.1 January 1995 DATABASE VERSION 1.1 January 1995 E - 1.16 107 of 189

Table 3.4-1 LaSalle Station -

Unit 1 MAXIMUM DOSES RESULTING FROM AIRBORNE RELEASES 2007 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 7.350E-03(

SE) 8.650E-04 (ESE)

2. 565E-03 (ESE) 3.570E-03(ESE) 2.690E-04 (ESE) 1.345E-02(WSW) 9.300E-04 (ESE) 3.750E-03( W 4.470E-03( W 3.825E-04 (ESE) 1.085E-02( W )

8.450E-04(

NE) 4.025E-03(SSW) 4.700E-03(SSW) 5.500E-04(

NE) 8.450E-03(

SE) 7.900E-04(

SE) 3.200E-03(SSW) 3.710E-03(SSW) 2.740E-04(

SE)

3. 237E-02 (WSW)

3. OOOE-03 (ESE) 1.213E-02 (SSW) 1.437E-02(SSW) 1.258E-03(ESE)

Child Thyroid Child Thyroid Child Thyroid Child Thyroid Child Thyroid COMPLIANCE STATUS 10 CFR 50 APP.

I 10 CFR 50 APP.I QUARTERLY OBJECTIVE

% OF APP.

I YEARLY OBJECTIVE TYPE OF DOSE 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 0.27 0.01 0.16 0.06 0.01 10.0 20.0 5.0 15.0 15.0

% OF APP.

I 0.32 0.02 0.24 0.10 0.01 Child Thyroid Child Thyroid Calculation used release data from the following:

Unit 0 -

Chimney Date of calculation:

3/28/2008 E - 1.17 108 of 189

Table 3.4-1 (continued)

LaSalle Station -

Unit 2 MAXIMUM DOSES RESULTING FROM AIRBORNE RELEASES 2007 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 7.350E-03(

SE) 8.650E-04(ESE) 2.56SE-03(ESE) 3.570E-03(ESE) 2.690E-04(ESE) 1.345E-02(WSW) 9.300E-04(ESE) 3.750E-03(

W 4.470E-03( W 3.825E-04(ESE) 1.085E-02( W )

8.450E-04(

NE)

4. 025E-03 (SSW) 4.700E-03(SSW) 5.500E-04(

NE) 8.450E-03(

SE) 7.900E-04(

SE) 3.200E-03 (SSW) 3.710E-03(SSW) 2.740E-04(

SE) 3.237E-02(WSW) 3.OOOE-03(ESE) 1.213E-02(SSW) 1.437E-02(SSW) 1.258E-03(ESE)

Child Thyroid Child Thyroid Child Thyroid Child Thyroid Child Thyroid COMPLIANCE STATUS 10 CFR 50 APP.

I 10 CFR 50 APP.I QUARTERLY OBJECTIVE

% OF APP.

I YEARLY OBJECTIVE TYPE OF DOSE 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 0.27 0.01 0.16 0.06 0.01 10.0 20.0 5.0 15.0 15.0

% OF APP.

I 0.32 0.02 0.24 0.10 0.01 Child Thyroid Child Thyroid Calculation used release data from the following:

Unit 0 -

Chimney Date of calculation:

3/28/2008 E - 1.18 109 of 189

APPENDIX F METEOROLOGICAL 110 of 189

LaSalle County Generating Station Period of Record: January -

March 2007 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 1-3 4-7 0

0 0

0 1

0 0

4 8

1 3

7 3

0 0

0 1

3 2

1 1

1 3

0 8-12 13-18 19-24

> 24 13 2

0 0

12 3

2 0

10 20 6

2 4

24 3

1 5

15 17 2

5 22 4

2 6

1 3

0 4

1 1

0 1

5 0

0 6

7 5

1 8

12 7

0 4

7 9

0 11 13 12 1

10 16 16 4

15 6

4 0

23 13 0

0 0

0 Total 19 25 39 35 47 36 10 6

6 20 30 22 38 47 26 39 0

Total 1

38 137 167 89 13 445 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3 F-I F 111 of 189

LaSalle County Generating Station Period of Record: January -

March 2007 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 1

0 1

2 1

0 0

1 7

1 0

0 0

0 7

1 2

1 0

0 2

1 1

0 0

3 0

1 0

0 1

3 2

0 0

0 4

0 1

0 0

0 1

1 0

0 0

0 7

3 0

0 0

0 6

8 1

0 0

0 3

6 3

2 0

0 8

10 3

2 0

1 7

7 21 2

0 0

6 7

2 0

0 1

5 10 0

0 0

0 Total 5

9 11 4

4 6

5 0

2 10 15 14 23 38 15 16 0

Total 1

3 65 63 37 8

177 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3 F-2 112 of 189

LaSalle County Generating Station Period of Record: January -

March 2007 Stability Class - Slightly 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

0 0

2 0

0 1

0 0

1 0

1 2

2 1

2 3

1 0

0 8-12 13-18 19-24

> 24 2

0 2

0 5

0 0

0 1

5 4

0 2

3 3

0 2

7 2

0 3

5 2

0 1

1 0

0 0

1 1

0 9

3 0

0 5

5 0

0 7

5 1

0 2

6 2

4 12 18 6

0 7

3 20 1

5 5

1 0

1 3

0 0

Total 6

5 10 9

11 10 3

2 13 12 15 15 38 34 12 4

0 Total 0

16 64 70 44 5

199 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3 F-3 113 of 189

LaSalle County Generating Station Period of Record: January -

March 2007 Stability Class - Neutral 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 1-3 4-7 0

0 0

2 1

1 0

0 0

0 2

0 0

4 5

1 2

2 6

4 7

3 4

2 6

1 2

1 5

0 Wind Speed (in mph) 8-12 13-18 19-24

> 24 7

10 1

0 4

1 0

0 11 3

0 0

9 10 0

0 18 17 13 8

10 7

3 0

2 11 0

0 9

4 2

0 7

4 3

0 8

21 14 1

24 32 14 0

11 16 3

11 26 27 6

8 33 43 34 5

29 19 1

0 23 10 7

0 0

0 Total 22 10 15 23 59 27 17 22 17 48 74 47 68 117 50 45 0

Total 6

55 231 235 101 33 661 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

2 Hours of missing stability measurements in all stability classes:

3 F-4 114 of 189

LaSalle County Generating Station Period of Record: January -

March 2007 Stability Class - Slightly Stable Winds Measured at 200Ft-33Ft 33 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 7

3 2

7 2

0 0

4 0

1 5

0 2

11 0

4 4

3 1

2 0

3 2

5 4

4 12 2

10 25 6

20 26 2

16 4

7 22 10 9

28 15 11 26 7

1 7

1 0

0 0

19-24 0

0 0

2 8

14 12 3

1 7

0 0

0

> 24 0

0 0

0 2

2 2

0 0

Total 13 11 4

6 13 11 3

12 30 53 67 27 41 61 44 9

0 Total 9

67 166 110 47 6

405 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:

3 F -5 115 of 189

LaSalle County Generating Station Period of Record: January -

March 2007 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

0 NNE 0

NE 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

0 0

1 0

0 0

2 4

2 2

7 8

12 17 5

3 0

8-12 13-18 19-24

> 24 0

0 0

0 1

0 0

0 2

0 0

0 3

0 0

0 14 1

0 0

4 1

0 0

3 2

0 0

7 3

2 0

11 4

0 0

7 2

0 0

12 8

0 0

21 4

0 0

14 0

0 0

Total 0

0 2

3 17 9

7 14 22 17 32 42 19 3

0 Total 0

63 99 25 2

0 189 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:

3 F-6 116 of 189

LaSalle County Generating Station Period of Record: January -

March 2007 Stability Class - Extremely Stable Winds Measured at 200Ft-33Ft Delta-T (F) 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 N

0 NNE 0

NE 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

4 1

0 0

2 5

1 0

7 4

5 0

0 0

0 8-12 13-18 19-24

> 24 0

0 0

0 1

0 0

0 5

0 0

0 3

0 0

0 10 1

0 0

12 7

0 0

3 0

0 0

4 1

0 0

2 0

0 0

1 0

0 0

Total 4

1 0

0 0

0 3

10 4

11 26 7

10 2

1 0

0 Total 0

29 41 9

0 0

79 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:

3 F-7 117 of 189

LaSalle County Generating Station Period of Record: January - March 2007 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 19-24

> 24 Total N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW Variable Total 0

2 5

14 9

26 56 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

3 Hours of missing stability measurements in all stability classes:

8 F-8 118 of 189

LaSalle County Generating Station Period of Record: January -

March 2007 Stability Class - Moderately 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 1-3 4-7 0

0 0

0 1

0 0

0 8-12 13-18 19-24

> 24 1

5 0

0 4

2 1

0 0

3 3

1 1

1 11 0

0 3

2 3

0 1

0 4

2 0

0 0

0 2

0 0

2 1

0 0

0 1

4 1

0 2

0 3

0 0

1 5

2 0

0 5

1 0

0 7

0 0

Total 6

7 7

13 8

5 2

1 2

3 6

5 0

8 6

7 0

Total 0

1 11 38 24 12 86 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

24 Hours of missing stability measurements in all stability classes:

8 F -9 119 of 189

LaSalle County Generating Station Period of Record: January -

March 2007 Stability Class -

Slightly Unstable 375Ft-33Ft Winds Measured at 375 Feet Delta-T (F)

Wind Speed (in mph)

Wind Direction 1-3 4-N 0

NNE 0

NE 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

7 8-12 13-18 19-24

> 24 Tota.

0 1

1 0

0 2

0 4

1 0

1 6

0 0

2 1

8 11 0

0 0

3 0

3 1

1 0

2 6

10 0

3 3

5 5

16 0

1 1

0 0

2 0

0 0

0 1

0 0

1 0

1 4

2 6

13 0

1 1

0 1

3 0

0 2

3 2

7 0

2 7

12 1

22 0

1 8

4 1

14 0

2 11 1

3 17 0

5 3

0 0

8 0

0 0

0 1

22 45 33 34 135 1

Total 0

Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

19 Hours of missing stability measurements in all stability classes:

8 F-IO0 120 of 189

LaSalle County Generating Station Period of Record: January -

March 2007 Stability Class -

Neutral 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 2

0 0

2 5

4 0

1 4

2 1

3 3

3 2

3 3

5 2

0 8-12 13-18 19-24

> 24 3

19 4

9 10 20 1

5 3

18 13 12 7

18 9

4 3

15 13 36 8

25 15 8

7 9

4 7

8 3

3 3

6 13 4

9 9

9 26 34 7

15 35 30 4

12 22 33 7

42 37 32 11 27 54 60 12 38 34 20 4

16 8

0 0

0 Total 37 41 50 38 68 60 31 18 35 81 90 73 121 155 109 30 0

Total 2

43 109 299 282 302 1037 21 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:

F-I1 8

121 of 189

LaSalle County Generating Station Period of Record: January - March 2007 Stability Class -

Slightly 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 2

1 0

0 0

1 0

1 2

2 1

1 0

8-12 13-18 19-24

> 24

.5 7

5 4

1 7

1 0

1 2

0 0

0 4

0 0

0 3

1 0

1 4

16 5

3 3

1 6

4 2

2 8

3 4

3 19 3

2 5

66 2

6 14 56 1

13 19 12 9

16 10 23 5

13 23 58 3

25 21 16 7

9 9

1 0

0 0

0 Total 23 11 3

5 4

27 13 16 29 77 78 46 60 101 67 27 0

Total 2

13 48 120 130 274 587 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:

8 F-12 122 of 189

LaSalle County Generating Station Period of Record: January -

March 2007 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 1

0 0

0 1

0 0

2 1

0 0

0 8-12 13-18 19-24

> 24 3

0 1

1 1

0 0

0 1

0 0

1 0

0 0

0 1

2 0

0 2

2 0

1 1

4 1

5 2

3 1

7 1

9 0

3 4

11 1

2 5

4 9

2 7

0 1

0 9

7 0

1 5

2 4

6 10 0

0 0

Total 6

1 1

1 0

3 4

6 11 19 18 12 20 18 9

20 0

Total 1

5 22 28 48 45 149 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:

8 F-13 123 of 189

.LaSalle County Generating Station Period of Record: January -

March 2007 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 0

0 0

4-7 8-12 13-18 19-24

> 24 Total 8

12 2

4 3

5 0

10 11 0

0 0

0 1

0 0

Total 0

0 2

4 3

25 34 Hours of calm in Hours of missing Hours of missing this stability class:

0 wind measurements in this stability class:

0 stability measurements in all stability classes:

8 F - 14 124 of 189

LaSalle County Generating Station Period of Record: April - June 2007 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

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW Variable Total 0

0 3

4 8

0 0

1 7

21 12 13 5

9 5

2 0

2 11 32 31 14 90 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:

3 F-15 125 of 189

LaSalle County Generating Station Period of Record: April - June 2007 Stability Class - Moderately Unstable 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 N

0 NNE 0

NE 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

0 0

1 0

0 0

0 8-12 13-18 19-24

> 24 0

0 0

0 3

0 0

7 0

0 1

4 0

2 1

0 0

1 0

0 0

0 2

0 1

2 6

1 2

13 3

1 0

Total 0

3 7

7 2

0 3

2 13 13 8

10 8

26 11 1

0 Total 0

1 36 58 11 8

114 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3 F-16 126 of 189

LaSalle County Generating Station Period of Record: April - June 2007 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 8-12 13-18 19-24

> 24 0

1 3

0 0

1 4

1 0

0 0

4 4

7 0

0 0

0 4

4 4

3 0

0 2

0 1

1 0

0 3

1 0

0 0

0 2

0 0

0 6

5 1

0 0

2 9

11 3

0 0

0 1

3 1

0 0

7 5

3 0

0 0

1 4

4 1

1 0

1 2

4 0

0 0

1 8

19 3

0 0

3 4

2 7

0 0

1 4

2 1

0 0

0 Total 4

6 15 15 4

4 2

12 25 5

15 11 7

31 16 8

0 Total 0

22 65 66 22 5

180 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:

3 F-17 127 of 189

LaSalle County Generating Station Period of Record: April - June 2007 Stability Class - Neutral 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 22 19 15 25 15 10 9

4 2

8 4

8 6

14 4

5 0

11 24 20 26 28 23 21 5

17 16 21 12 15 31 29 9

0 1

1 27 23 44 15 9

5 8

5 7

7 11 21 21 34 0

0 0

1 11 10 4

1 0

3 10 3

5 5

18 9

5 0

35 45 63 94 101 58 40 14 32 40 40 33 38 93 63 53 0

Total 4

170 308 239 85 36 842 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:

3 F-18 128 of 189

LaSalle County Generating Station Period of Record: April -

June 2007 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 14 23 8

3 20 11 9

1 6

8 10 9

10 13 10 1

0 2

9 7

34 56 3

4 6

10 11 14 8

17 8

9 7

0 0

0 6

6 17 6

4 4

10 10 16 3

2 6

2 0

0 18 33 23 43 100 24 17 13 33 37 44 21 37 45 24 8

0 Total 16 156 205 92 32 19 520 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3 F-19 129 of 189

LaSalle County Generating Station Period of Record: April - June 2007 Stability Class - Moderately Stable Winds Measured at 200Ft-33Ft 33 Feet Delta-T (F)

Wind Speed (in mph)

Wind Direction N

NNE NE ENE E

ESE 1-3 1

0 0

1 4-7 8-12 13-18 19-24

> 24 Total 8

4 2

1 1

0 0

0 7

7 0

0 0

0 1

2 0

13 0

9 SE SSE 1

12 10 1

16 10 S

SSW 1

0 1

9 4

5 9

5 8

0 0

3 3

2 1

0 0

10 0

4 0

2 0

21 0

18 0

23 0

27 0

22 0

12 0

16 0

24 SW WSW 3

10 10 W

0 5

WNW NW NNW Variable 0

15 2

10 2

1 1

0 0

0 7

0 16 0

13 0

10 2

0 8

0 0

0 Total 13 131 71 12 0

227 Hours of calm in Hours of missing Hours of missing this stability class:

0 wind measurements in this stability class:

0 stability measurements in all stability classes:

3 F - 20 130 of 189

LaSalle County Generating Station Period of Record: April - June 2007 Stability Class -

Extremely 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 Total 1-3 4-7 0

0 0

1 2

1 1

0 1

0 0

3 0

0 0

5 8

12 18 14 7

4 3

14 14 7

3 0

8-12 13-18 19-24

> 24 0

0 0

0 1

0 0

0 2

0 0

0 5

0 0

0 18 0

0 0

18 0

0 0

13 0

0 0

21 0

0 0

8 0

0 0

1 0

0 0

1 0

0 0

2 0

0 0

Total 3

0 0

1 8

11 18 36 33 20 25 11 15 14 8

5 0

208 6

112 90 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:

3 F -21 131 of 189

LaSalle County Generating Station Period of Record: April -

June 2007 Stability Class - Extremely Unstable

- 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 Total Wind Speed (in mph) 1-3 4-7 8-12 13-18 19-24

> 24 Total 0

6 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:

3 F - 22 132 of 189

LaSalle County Generating Station Period of Record: April -

June 2007 Stability Class - Moderately 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 1-3 4-7 8-12 13-18 19-24

> 24 Total Total 0

0 0

2 3

13 18 Hours of calm in Hours of missing this stability class:

0 wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3 F - 23 133 of 189

LaSalle County Generating Station Period of Record: April -

June 2007 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 1-3 4-7 8-12 13-18 19-24

> 24 0

0 0

0 1

2 1

0 0

0 6

0 0

2 1

0 0

4 0

0 0

3 2

1 0

0 0

0 4

6 0

0 0

5 1

1 0

0 1

1 5

0 0

0 2

1 1

0 0

0 2

1 0

0 0

3 4

2 0

0 0

1 1

0 0

0.

0 0

Total 0

4 6

3 4

0 0

0 6

10 7

7 4

4 9

2 0

Total 0

0 6

19 26 15 66 Hours of calm in this stability class:

Hours of missing wind measurements in 0

this stability class:

0 Hours of missing stability measurements in all stability classes:

F -24 3

134 of 189

LaSalle County Generating Station Period of Record: April -

June 2007 Stability Class -

Neutral 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

2 1

0 0

1 0

0 0

3 8

13 12 7

6 6

1 0

1 5

3 3

12 5

1 0

8-12 13-18 19-24

> 24 15 10 2

0 19 27 6

1 11 27 39 7

18 32 20 30 18 30 39 12 19 14 9

15 15 16 6

2 7

12 3

0 11 32 15 10 10 21 5

22 21 10 9

10 11 20 21 9

10 14 10 7

25 50 36 32 32 18 32 35 6

7 19 3

0 0

Total 30 61 97 114 107 63 45 24 68 59 55 64 44 155 122 36 0

Total 4

86 248 340 271 195 1144 1

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:

3 F - 25 135 of 189

LaSalle County Generating Station Period of Record: April -

June 2007 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 1

0 1

1 0

1 1

0 0

2 1

1 2

3 1

3 2

0 0

0 1

1 7

3 5

0 8-12 13-18 19-24

> 24 6

4 0

0 4

23 4

1 10 8

0 0

14 30 11 0

9 23 17 20 8

21 10 9

9 6

4 2

3 5

3 4

4 3

9 18 5

5 12 25 5

10 15 24 7

11 6

2 7

11 10 9

8 14 14 20 9

10 11 1

9 8

3 0

0 0

Total 13 33 20 58 72 50 25 17 34 47 54 28 38 63 34 25 0

Total 32 117 192 129 135 611 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3 F - 26 136 of 189

LaSalle County Generating Station Period of Record: April -

June 2007 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 2

4 3

1 0

1 2

0 2

0 0

2 0

1 0

0 0

8-12 13-18 19-24

> 24 4

1 1

0 1

1 0

0 0

1 0

0 4

1 0

0 0

6 4

0 1

4 2

10 3

6 1

5 8

3 2

4 5

17 4

7 4

20 0

4 4

5 0

3 5

4 0

3 3

2 4

1 1

1 4

6 3

0 4

4 3

0 0

0 Total 9

6 5

6 10 13 23 17 31 35 13 14 8

9 14 11 0

Total 6

18 31 61 46 62 224 Hours of calm in this stability class:

1 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3 F - 27 137 of 189

LaSalle County Generating Station Period of Record: April -

June 2007 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 1

0 0

0 1

0 0

0 1

1 0

0 2

0 0

1 2

2 1

0 1

3 0

2 0

1 0

0 0

0 3

4 3

2 2

2 5

1 0

0 0

0 1

2 5

0 2

4 4

0 0

1 0

1 11 12 3

13 0

0 0

0 1

0 0

2 4

6 12 14 18 14 21 6

4 6

1 0

9 10 26 18 41 109 Hours of calm in Hours of missing this stability class:

1 wind measurements in this stability.class:

0 Hours of missing stability measurements in all stability classes:

3 F -28 138 of 189

LaSalle County Generating Station Period of Record: July -

September 2007 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 1-3 4-7 8-12 13-18 19-24

> 24 Total Total 0

1 10 15 5

0 31 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

0 F - 29 139 of 189

LaSalle County Generating Station Period of Record: July -

September 2007 Stability Class - Moderately Unstable 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Direction 1-3 Wind Speed (in mph) 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 1

1 0

0 1

1 0

0 0

10 19 6

7 16 4

0 0

2 1

0 0

1 2

0 0

2 17 28 13 13 19 6

0 0

Total U

3 66 33 0

104 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stabili Hours of missing stability measurements in all sta ty class:

bility cl, 0

asses:

0 F - 30 140 of 189

LaSalle County Generating Station Period of Record: July -

September 2007 Stability Class -

Slightly 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

0 0

3 10 4

0 3

1 0

1 1

0 9

8 6

8 3

1 0

8-12 13-18 19-24

> 24 5

1 0

0 6

0 0

0 7

0 0

0 8

0 0

0 1

0 0

0 1

1 0

0 1

0 0

0 4

4 0

0 6

6 2

0 17 6

0 0

10 4

0 0

6 4

1 0

13 1

0 0

4 3

0 0

8 0

0 0

Total 9

16 11 8

4 1

2 2

9 14 32 22 17 22 10 9

0 Total 0

58 97 30 3

0 188 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:

F -31 0

141 of 189

LaSalle County Generating Station Period of Record: July -

September 2007 Stability Class - Neutral 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW Variable 2

2 1

0 1

0 34 46 24 24 34 20 18 24 12 6

17 28 16 25 13 15 0

8-12 13-18 19-24

> 24 15 1

0 0

6 0

0 0

23 2

0 0

20 4

0 0

20 2

0 0

9 1

0 0

17 0

0 0

18 1

0 0

19 20 0

0 17 17 0

0 22 7

0 0

19 14 0

0 11 6

1 0

17 2

3 0

9 4

1 0

28 14 0

0 0

0 Total 52 54 50 48 57 30 36 44 54 42 47 61 34 48 27 58 0

Total 16 356 270 95 5

0 742 1

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 F -32 142 of 189

LaSalle County Generating Station Period of Record: July -

September 2007 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 8-12 13-18 19-24

> 24 Total 34 31 8

7 17 10 11 5

9 13 18 7

4 11 7

16 0

5 6

18 21 21 11 5

13 16 19 25 10 6

8 4

11 0

42 41 28 34 38 25 19 21 33 37 56 23 12 23 14 29 0

Total 35 208 199 28 5

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 F - 33 143 of 189

LaSalle County Generating Station Period of Record: July - September 2007 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 8-12 13-18 19-24

> 24 2

19 0

0 0

9 0

0 0

0 1

1 0

0 0

1 0

0 0

0 1

34 14 0

0 0

1 25 3

0 0

0 1

18 2

0 0

0 4

17 11 0

0 0

0 15 4

0 0

0 4

19 8

0 0

0 1

17 18 0

0 0

1 11 1

0 0

0 1

15 1

0 0

0 3

20 4

0 0

0 1

11 0

0 0

0 1

6 2

0 0

0 Total 21 9

2 1

49 29 21 32 19 31 36 13 17 27 12 9

0 Total 22 238 68 0

0 0

328 1

Hours of calm in this stability class:

2 Hours of missing wind measurements in this stability class:

Hours of missing stability measurements in all stability classes:

F -34 0

144 of 189

LaSalle County Generating Station Period of Record: July -

September 2007 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 8

5 0

1 9

29 45 37 21 23 22 20 11 8

6 3

0 8-12 13-18 19-24

> 24 0

0 0

0 4

0 0

0 6

0 0

0 8

0 0

0 15 0

0 0

2 0

0 0

12 0

0 0

16 0

0 0

11 0

0 0

1 0

0 0

Total 9

5 1

2 15 38 53 53 23 35 38 32 14 8

7 3

0 Total 13 248 75 0

0 0

336 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 F -35 145 of 189

LaSalle County Generating Station Period of Record: July -

September 2007 Stability Class -

Extremely 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 0

0 0

0 8-12 13-18 19-24

> 24 0

0 0

0 Total 0

0 0

0 U

0 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

0 F - 36 146 of 189

LaSalle County Generating Station Period of Record: July - September 2007 Stability Class - Moderately 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 0

0 0

0 8-12 13-18 19-24

> 24 0

0 0

1 0

0 0

1 0

0 0

0 Total 0

0 0

1 0

0 0

2 0

1 0

I Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

0 F-37 147 of 189

LaSalle County Generating Station Period of Record: July - September 2007 Class -

Slightly Unstable 375Ft-33Ft Winds Measured at 375 Feet Stability Delta-T (F)

Wind Speed (in mph)

Wind Direction N

NNE NE ENE E

ESE 1-3 0

0 0

4-7 8-12 13-18 19-24

> 24 Total 0

0 0

0 1

0 0

0 SE SSE S

SSW SW WSW W

0 0

0 WNW NW NNW 0

0 0

4 0

0 1

0 0

0 3

18 0

10 I

0 0

3 0

0 0

5 2

0 0

0 2

0 0

0 4

0 0

0 Variable Total 0

10 10 12 5

37 Hours of calm in Hours of missing Hours of missing this stability class:

0 wind measurements in this stability class:

0 stability measurements in all stability classes:

0 F-38 148 of 189

LaSalle County Generating Station Period of Record: July -

September 2007 Stability Class -

Neutral 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 2

0 1

0 0

1 3

0 0

0 1

0 0

20 20 15 11 17 10 14 16 4

1 13 6

7 14 11 9

0 8-12 13-18 19-24

> 24 24 9

2 0

44 10 0

0 24 26 4

0 22 26 0

0 26 7

1 0

10 9

2 0

11 8

3 0

10 7

0 0

8 22 17 4

12 36 17 15 29 37 16 4

41 10 19 4

21 14 5

3 30 30 5

3 23 21 11 1

14 17 10 0

0 0

Total 55 74 71 59 52 31 36 33 55 82 102 80 50 82 68 50 0

Total 8

188 349 289 112 34 980 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:

0 F - 39 149 of 189

LaSalle County Generating Station Period of Record: July - September 2007 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 8-12 13-18 19-24

> 24 Total 15 15 5

15 10 6

11 5

6 3

8 3

6 4

8 4

0 16 24 29 42 17 5

5 7

8 9

10 12 11 11 11 6

0 17 2

5 8

7 6

6 6

11 12 22 10 5

5 11 7

0 0

3 1

2 9

17 18 5

1 2

3 1

0 52 46 43 69 45 28 28 25 40 42 65 38 25 30 35 25 0

Total 11 76 124 223 140 62 636 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

0 F - 40 150 of 189

LaSalle County Generating Station Period of Record: July - September 2007 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 3

6 3

2 2

9 2

5 6

4 3

0 1

0 0

1 0

8-12 13-18 19-24

> 24 2

3 1

0 6

3 3

0 4

8 0

0 3

0 1

0 4

11 8

0 13 8

10 2

5 9

5 5

4 4

9 6

3 4

11 8

4 4

13 7

8 12 12 15 5

5 3

2 9

5 5

0 4

3 6

0 2

7 4

1 3

7 1

0 0

0 Total 10 18 15 7

25 43 26 28 32 32 50 15 20 13 14 12 0

Total 3

47 79 93 92 46 360 Hours of calm in this stability class:

1 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

0 F -41 151 of 189

LaSalle County Generating Station Period of Record: July - September 2007 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

1 0

0 0

0 1

1 0

2 0

0 0

0 8-12 13-18 19-24

> 24 0

o 0

0 0

1 0

0 0

5 3

2 0

4 8

15 0

0 13 22 3

4 3

16 6

5 5

9 5

7 5

12 2

4 2

5 2

6 2

0 0

0 3

0 0

0 Total 0

1 1

0 2

10 28 35 27 28 30 14 12 3

0 0

0 Total 1

11 18 36 44 81 191 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

0 F - 42 152 of 189

LaSalle County Generating Station Period of Record: October -

December2007 Class -

Extremely Unstable 200Ft-33Ft Stability 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 0

0 0

0 4-7 8-12 13-18 19-24

> 24 Total Hours of Hours of Hours of calm in missing missing this stability class:

0 wind measurements in this stability class:

0 stability measurements in all stability classes:

3 F - 43 153 of 189

LaSalle County Generating Station Period of Record: October -

December2007 Stability Class - Moderately Unstable

- 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Win 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

d Speed (in mph) 8-12 13-18 1

1 o

0 o

o 0

0 0

0 1

2 0

3 0

1 0

0 0

0 19-24 0

0 0

1 0

0 0

> 24 0

0 0

1 0

0 0

Total 2

0 0

5 3

1 1

0 0

Total 0

0 2

8 I

1 12 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:

3 F - 44 154 of 189

LaSalle County Generating Station Period of Record: October December2007 Stability Class -

Slightly 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 8-12 13-18 19-24

> 24 0

0 2

0 0

0 1

3 0

0 0

1 0

0 0

0 1

0 0

1 0

0 0

1 0

0 0

0 6

5 0

1 0

0 2

4 0

0 0

3 0

0 0

3 0

0 0

1 0

0 0

0 Total 2

4 1

1 0

0 0

1 1

12 6

3 3

0 1

0 0

35 0

0 0

11 19 1

4 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:

3 F - 45 155 of 189

LaSalle County Generating Station Period of Record: October December2007 Stability Class - Neutral 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

1 0

0 0

1 0

0 1

0 0

1 2

0 1

0 0

27 23 6

6 8

3 6

4 4

4 2

4 11 14 11 3

0 8-12 13-18 19-24

> 24 27 23 5

0 33 10 0

0 9

8 1

0 5

9 2

0 8

12 0

0 15 10 1

0 13 5

1 0

22 11 6

1 31 13 0

1 30 6

6 3

37 21 2

3 14 5

10 2

35 29 22 16 24 37 12 0

22 40 26 4

42 37 11 1

0 0

Total 84 67 24 22 28 30 25 44 50 49 65 36 115 87 104 94 0

Total 9

136 367 276 105 31 924 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:

F -46 3

156 of 189

LaSalle County Generating Station Period of Record: October -

December2007 Stability Class - Slightly 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 8-12 13-18 19-24

> 24 2

23 7

2 0

0 2

16 14 0

0 0

0 3

12 3

0 0

2 2

4 2

0 0

0 11 13 2

0 0

0 17 27 5

0 0

1 10 10 18 1

0 0

9 17 16 4

0 0

10 21 21 6

0 1

12 17 27 5

0 0

15 20 24 3

1 1

13 11 19 1

0 0

13 15 12 5

0 5

19 16 7

27 12 2

16 26 12 6

0 0

15 24 1

0 0

Total 34 32 18 10 26 49 40 46 58 62 63 45 45 86 62 40 0

Total 16 204 254 171 58 13 716 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3 F - 47 157 of 189

LaSalle County Generating Station Period of Record: October -

December2007 Stability Class -

Moderately Stable 200Ft-33Ft Winds Measured at 33 Feet Wind Speed (in mph)

Wind Delta-T (F)

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 1

1 0

0 0

2 0

1 0

0 0

1 1

0 0

1 0

5 2

0 1

5 3

5 14 14 6

0 10 13 12 0

0 2

0 0

1 5

5 9

9 19 14 24 13 8

6 14 1

0 0

0 7

14 11 1

1 0

0 0

8 3

0 2

6 12 12 15 40 42 41 15 20 19 26 2

0 Total 8

91 130 34 0

0 263 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3 F -48 158 of 189

LaSalle County Generating Station Period of Record: October December2007 Stability Class -

Extremely Stable 200Ft-33Ft Winds Measured at 33 Feet Wind Speed (in mph)

Wind Delta-T (F)

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 1

0 0

5 2

0 0

17 3

0 0

0 2

34 9

0 0

30 22 1

0 0

0 15 16 0

0 0

0 8

25 0

0 0

0 9

12 0

0 0

0 13 5

0 0

10 3

0 0

5 6

0 0

0 1

0 0

0 Total 0

0 0

0 1

7 20 45 53 31 33 21 18 13 11 1

0 Total 3

146 104 1

0 0

254 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:

3 F - 49 159 of 189

LaSalle County Generating Station Period of Record: October -

December2007 Stability Class -

Extremely 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 1-3 4-7 8-12 13-18 19-24

> 24 0

0 0

0 Total 0

0 0

0 Total 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:

3 F -50 160 of 189

LaSalle County Generating Station Period of Record: October -

December2007 Stability Class - Moderately 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 0

0 0

8-12 0

0 0

13-18 19-24

> 24 Total 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:

3 F -51 161 of 189

LaSalle County Generating Station Period of Record: October -

December2007 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 1

0 0

2 0

0 0

0 1

2 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3 F-52 162 of 189

LaSalle County Generating Station Period of Record: October -

December2007 Stability Class -

Neutral 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

0 0

2 0

10 6

4 5

1 4

0 0

1 2

6 2

2 6

7 4

0 8-12 13-18 19-24

> 24 12 12 25 10 16 20 23 4

3 13 10 5

7 12 6

1 7

8 7

1 3

12 6

4 7

9 7

1 8

10 6

11 15 26 8

5 14 32 13 15 15 32 15 7

14 7

6 38 22 23 23 22 11 18 23 31 27 18 39 35 11 23 20 12 0

0 0

0 Total 69 69 35 31 24 29 24 35 55 76 76 67 92 89 126 72 0

Total 3

60 192 275 237 202 969 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

5 Hours of missing stability measurements in all stability classes:

3 F -53 163 of 189

LaSalle County Generating Station Period of Record: October -

December2007 Stability Class -

Slightly Stable 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph) 8-12 13-18 19-24

> 24 Total Wind Direction N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW Variable 1-3 4-7 5

14 7

8 2

1 2

6 6

3 6

9 9

5 4

4 0

6 14 9

3 5

1 15 21 23 21 14 11 12 9

32 10 0

10 2

3 1

3 9

13 15 20 17 25 5

7 25 8

13 0

3 0

1 0

2 3

15 9

25 57 31 16 18 58 5

2 0

27 34 23 16 15 15 46 53 76 100 78 43 46 100 58 33 0

763 Total 7

38 91 206 176 245 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

27 Hours of missing stability measurements in all stability classes:

F

- 54 3

164 of 189

LaSalle County Generating Station Period of Record: October -

December2007 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

0 0

1 0

0 0

2 0

0 0

1 1

0 1

0 0

4 2

2 2

3 0

0 8-12 13-18 19-24

> 24 1

2 5

2 3

0 0

0 2

0 0

0 3

0 0

1 2

4 4

1 2

4 2

8 7

7 7

16 11 15 16 35 5

6 11 6

4 9

12 8

1 7

5 4

4 8

5 2

1 5

4 4

2 5

5 1

0 0

Total 12 3

2 3

1 8

11 17 38 77 32 36 19 22 17 13 0

Total 3

18 50 70 76 94 311 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:

F-55 3

165 of 189

LaSalle County Generating Station Period of Record: October -

December2007 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 N

NNE NE ENE E

ESE SE S SE S

SSW SW WSW W

WNW NW NNW Variable 1-3 4-7 8-12 13-18 19-24

> 24 0

1 1

0 0

0 1

0 0

0 2

3 0

0 1

12 2

4 0

0 1

9 5

5 0

0 1

3 12 13 0

0 2

2 19 21 0

0 0

1 0

0 0

0 1

1 0

0 0

1 3

0 0

0 Total 2

1 0

0 0

0 5

19 20 29 44 1

2 0

0 4

0 Total 0

1 7

27 44 48 127 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

3 F -56 166 of 189

APPENDIX G ANNUAL RADIOLOGICAL GROUNDWATER PROTECTION PROGRAM REPORT (ARGPPR) 167 of 189

Docket No:

50-373 50-374 LASALLE COUNTY STATION UNITS 1 and 2 Annual Radiological Groundwater Protection Program Report 1 January Through 31 December 2007 Prepared By Teledyne Brown Engineering Environmental Services Nuclear LaSalle County Station Marseilles, IL 61341 May 2008 168 of 189

Table Of Contents

1. Summary and Conclusions..................................................................1..

11. Introduction.....................................................................................

3 A. Objectives of the RGPP...............................................................

3 B. Implementation of the Objectives..................................................... 3 C. Program Description...................................................................

4 D. Characteristics of Tritium (H-3)....................................................... 5 Ill. Program Description...........................................................................

6 A. Sample Analysis.......................................................................

6 B. Data Interpretation.....................................................................

6 C. Background Analysis..................................................................

7

1. Background Concentrations of Tritium.......................................

7 IV. Results and Discussion.......................................................................

9 A. Groundwater Results..................................................................

9 B. Drinking Water Well Survey.........................................................

10 C. Summary of Results - Inter-laboratory Comparison Program.................... 10 D. Leaks, Spills, and Releases.........................................................

10 E. Trends.................................................................................

10 F. Investigations.........................................................................

10 G. Actions Taken........................................................................

10 169 of 189

Appendices Appendix A Tahles Table A-I:

Location Designation LaSalle County Station Groundwater Monitoring Sample Point List Figures Figure A-I:

Appendix B LaSalle County Station Map of Groundwater Monitoring Sample Locations.

Data Tables Concentrations of Tritium in Groundwater Samples Collected in the Vicinity of LaSalle County Station, 2007.

Concentrations of Tritium in Surface Water Samples Collected in the Vicinity of LaSalle County Station, 2007.

Tahles Table B-1.1 Table B-11.1 ii 170 of 189

I.

Summary and Conclusions In 2006, Exelon instituted a comprehensive program to evaluate the impact of station operations on groundwater and surface water in the vicinity of LaSalle County Station. This evaluation involved numerous station personnel and contractor support personnel. Baseline sampling efforts included the use of six surface water locations, two of which were already included in LaSalle's REMP sampling program, and seventeen groundwater well sampling locations.

Following baseline sampling and subsequent recommendations, LaSalle's RGPP program now consists of the six surface water and nine groundwater well sampling locations. The results for LaSalle's RGPP sampling efforts in 2007 are included in this report.

This is the second in a series of annual reports on the status of the Radiological Groundwater Protection Program (RGPP) conducted at LaSalle County Station.

This report covers groundwater and surface water samples, collected from the environment, both on and off station property in 2007. During that time period, 32 analyses were performed on 32 samples from 15 locations, (6 surface water and 9 ground water wells. The monitoring was conducted during two periods.

Period 1 of the monitoring was conducted in April 2007 by a vendor sample collector with LaSalle Station personnel in attendance. Period 2 was conducted in October 2007 by Station personnel with the vendor sample collector providing assistance. Future sampling will be conducted by Station personnel.

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

The Station's on-going monitoring program consists of analyzing for tritium semi-annually, with gamma emitters and Strontium-89/90 analyzed on a biennial basis.

As such, gamma emitting nuclides and Strontium-89/90 were not evaluated in 2007. These analyses are scheduled to be performed during 2008.

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

Tritium was not detected in any of the groundwater or surface water samples at concentrations greater than the United States Environmental Protection Agency (USEPA) drinking water standard (and the Nuclear Regulatory Commission Reporting Limit) of 20,000 pCi/L. Low levels of tritium were detected at concentrations greater than the LLD-of 200 pCi/L in lof 9 groundwater monitoring locations. The tritium concentrations ranged from 816 +/- 151 pCi/L to 826 +/- 166 pCi/L. No tritium was detected in the six surface water samples above specified 1

171 of 189

LLD. Elevated tritium levels (> 200 pCi/L) observed in the single well location are believed to be associated with the 2001 CY tank rupture as documented in the stations 10CFR75g report.

2 172 of 189

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.

This report covers those analyses performed by Teledyne Brown Engineering (TBE) and Environmental Inc. (Midwest Labs) on samples collected in 2007.

A.

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

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

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

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

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

5. Regularly assess analytical results to identify adverse trends.

6. Take necessary corrective actions to protect groundwater resources.

B.

Implementation of the Objectives The objectives identified have been implemented at LaSalle County Station as discussed below: 173 of 189

1.

Exelon and its consultant identified locations as described in the 2006 Phase 1 study. Phase 1 studies were conducted by Conestoga Rovers and Associates (CRA) and the results and conclusions were made available to state and federal regulators as well as the public on an Exelon web site in station specific reports.

http:/lwww.exelonCorp.com/ourcompanies/powergen/nuclear/Tritiu m.htm

2.

The LaSalle County Station reports describe the local hydrogeologic regime. Periodically, the flow patterns on the surface and shallow subsurface are updated based on ongoing measurements.

3.

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

4.

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

5.

LaSalle County Station staff and consulting hydrogeologist assess analytical results on an ongoing basis to identify adverse trends.

C.

Program Description 1.

Sample Collection Sample locations can be found in Table A--i, Appendix A.

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

Analytical laboratories are subject to internal quality assurance programs, industry cross-check programs, as well as nuclear industry audits. Station personnel review and evaluate all analytical data deliverables as data are received. 174 of 189

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

D.

Characteristics of Tritium (H-3)

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

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

Tritium is produced naturally in the upper atmosphere when cosmic rays strike air molecules. Tritium is also produced during nuclear weapons explosions, as a by-product in reactors producing electricity, and in special production reactors, where the isotopes lithium-7 and/or boron-10 are activated to produce tritium.

Like normal water, tritiated water is colorless and odorless. Tritiated water behaves chemically and physically like non-tritiated water in the subsurface, and therefore tritiated water will travel at the same velocity as the average groundwater velocity.

Tritium has a half-life of approximately 12.3 years. It decays spontaneously to helium-3 (3He). This radioactive decay releases a beta particle (low-energy electron). The radioactive decay of tritium is the source of the health risk from exposure to tritium. Tritium is one of the least dangerous radionuclides because it emits very weak radiation and leaves the body relatively quickly. Since tritium is almost always found as water, it goes directly into soft tissues and organs. The associated dose to these tissues is generally uniform and is dependent on the water content of the specific tissue. 175 of 189

1ll.

Program Description A.

Sample Analysis This section describes the general analytical methodologies used by TBE to analyze the environmental samples for radioactivity for the LaSalle County Station RGPP in 2007.

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

1.

Concentrations of gamma emitters in groundwater and surface water. (Biennially)

2.

Concentrations of strontium in groundwater and surface water.

(Biennially)

3.

Concentrations of tritium in groundwater and surface water. (Semi-annually)

B.

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

1.

Lower Limit of Detection and Minimum Detectable Concentration The lower limit of detection (LLD) is specified by federal regulation as a minimum sensitivity value that must be achieved routinely by the analytical parameter.

2.

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

Statistically, the exact value of a measurement is expressed as a range with a stated level of confidence. The convention is to report results with a 95% level of confidence. The uncertainty comes from calibration standards, sample volume or weight measurements, sampling uncertainty and other factors. Exelon reports the 176 of 189

uncertainty of a measurement created by statistical process (counting error) as well as all sources of error (Total Propagated Uncertainty or TPU). Each result has two values calculated.

Exelon reports the TPU by following the result with plus or minus +

the estimated sample standard deviation, as TPU, that is obtained by propagating all sources of analytical uncertainty in measurements.

Analytical uncertainties are reported at the 95% confidence level in this report for reporting consistency with the AREOR.

C.

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

1.

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

a.

Tritium Production Tritium is created in the environment from naturally occurring processes both cosmic and subterranean, as well as from anthropogenic (i.e., man-made) sources. In the upper atmosphere, "Cosmogenic" tritium is produced from the bombardment of stable nuclides and combines with oxygen to form tritiated water, which will then enter the hydrologic cycle. Below ground, "lithogenic" tritium is produced by the bombardment of natural lithium present in crystalline rocks by neutrons produced by the radioactive decay of naturally abundant uranium and thorium. Lithogenic production of tritium is usually negligible compared to other sources due to 177 of 189

the limited abundance of lithium in rock. The lithogenic tritium is introduced directly to groundwater.

A major anthropogenic source of tritium and strontium-90 comes from the former atmospheric testing of thermonuclear weapons. Levels of tritium in precipitation increased significantly during the 1950s and early 1960s, and later with additional testing, resulting in the release of significant amounts of tritium to the atmosphere. The Canadian heavy water nuclear power reactors, other commercial power reactors, nuclear research and weapons production continue to influence tritium concentrations in the environment.

b.

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

RadNet provides tritium precipitation concentration data for samples collected at stations through out the U.S. from 1960 up to and including 2006. Based on GNIP data for sample stations located in the U.S. Midwest, tritium concentrations peaked around 1963. This peak, which approached 10,000 pCi/L for some stations, coincided with the atmospheric testing of thermonuclear weapons. Tritium concentrations in surface water showed a sharp decline up until 1975 followed by a gradual decline since that time. Tritium concentrations in Midwest precipitation have typically been below 100 pCi/L since around 1980. LaSalle's 1979 or 1981 pre-operational REMP showed precipitation tritium concentrations >300.

Tritium concentrations in wells may still be above the 200 pCi/L detection limit from the external causes described above. Water from previous years and decades is naturally captured in groundwater, so some well water sources today are affected by the surface water from the 1960s that was elevated in tritium.

Surface Water Data Tritium concentrations are routinely measured in large surface water bodies, including Lake Michigan and the 178 of 189

Mississippi River. Illinois surface water data were typically less than 100 pCi/L. Illinois River H3 results have shown

>200 pCi/L, as evidenced in LaSalle's REMP program sample results. This could be attributable to release for Braidwood and Dresden upstream The USEPA RadNet surface water data typically has a reported 'Combined Standard Uncertainty' of 35 to 50 pCi/L.

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

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

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

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

IV.

Results and Discussion A.

Groundwater Results Groundwater Samples were collected from on and off-site wells throughout the year in accordance with the station radiological groundwater protection program. Analytical results and anomalies are discussed below.

Tritium Samples from all locations were analyzed for tritium activity (Table B-I.1, Appendix B). Tritium values were <LLD with the exception of the one on-site well location that showed a maximum concentration of 826 pCi/I. Outside of the owner-controlled area, tritium concentrations were less than the detection limit. Based on the hyrogeological study conducted at LaSalle, there is no feasible pathway into a drinking water supply. Based on established aquifer flow paths the location most representative of potential offsite release into groundwater was also less than the detection limit. 179 of 189

Strcontium Strontium-90 was not evaluated in 2007.

Gamma Emitters Gamma emitters were not evaluated in 2007.

B.

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

C.

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

D.

Leaks, Spills, and Releases No new leaks or spills were discovered through efforts conducted at LaSalle Station. Historical spills were captured in the CSA report as well as the Station's 10CFR75g reports.

E.

Trends Baseline data established at LaSalle revealed no current ground water issues. On-going monitoring through the RGPP will allow for early detection of any potential threats to groundwater on and around the site.

F.

Investigations There were no anomalous result investigations conducted at for LaSalle RGPP sample results in 2007.

G.

Actions Taken

1. Compensatory Actions There were no required compensatory actions as a result of RGPP 180 of 189

monitoring at LaSalle in 2007.

2. Installation of Monitoring Wells No new monitoring wells were added beyond the initial phase for LaSalle in 2007.

3. Actions to Recover/Reverse Plumes 2007 LaSalle RGPP efforts resulted in no required actions.

Figure A-i:

LaSalle County Station Map of Groundwater Monitoring Sample Locations 181 of 189

APPENDIX A LOCATION DESIGNATION & DISTANCE 182 of 189

Table A-1 LaSalle County Station Groundwater Monitoring Sample Point List Sample No.

Location Current Well Status SW-LS-101 North Storm Water Pond Active SW-LS-102 Active South Storm Water Pond SW-LS-103 Active Circ Water Discharge Canal SW-LS-104 Active Illinois River Upstream at Seneca (Boondocks)

"SW-LS-105 Active Illinois River Downstream at Marseilles (Illini State Park Boat Ramp)

SW-LS-106 Active Circ Water Intake Bay MW-LS-101S Iatv SW Comer of Perimiter Road Inactive MW-LS-102S Inactive OLD Parking Lot West (Lake) Side MW-LS-103S Inactive MAF South Centerline MW-LS-104S Active CY Storage Tanks MW-LS-105S Active Behind IRSF MW-LS-106S Active Spare Transformer Area-Back Toward Security Fence MW-LS-107S Active Old Service Building - Near Outage Trailers MW-LS-108S Inactive Near 12 KV Swithchyard A-1 183 of 189

Sample No.

Location Current Well Status MW-LS-1 09S Inactive Near BDG 33 MW-LS-11OS Inactive RSH Area by Valve Pit 16B MW-LS-111lS West Perimeter Road before pad mounted transformer Active (right hand side)

MW-LS-1 125 Inactive Between perimeter security fences near SE comer.

(Access via security gate east of 12 KV switchyard)

MW-LS-l113S Between perimeter security fences near CW intake Inactive bay. (Access via security gate east of 12 KV switchyard)

HP-2 North of tracks near Nuclear Fuel Lay-down Area Active HP-5 Active Near VQ LN2 Storage Tanks HP-7 Active Near UAT's HP-10 Active Near VQ LN2 Storage Tanks, South of HP-5 A-2 184 of 189

FIGURE A-1 LASALLE COUNTY STATION MAP OF GROUNDATER MONITORING SAMPLE LOCATIONS 185 of 189

4 LEGEND KEY PLAN f ;

0 FINAL DRAFT D AN N ~IN'AL A'T OR Nr5*Ctjr3r C ')

N-OACA ATT RN'*¥ WORKR ADDITIONAL MONITORING WELL LOCATION KEY PLAN 4

APPENDIX B DATA TABLES 187 of 189

TABLE B-1.1 CONCENTRATIONS OF TRITIUM IN GROUNDWATER SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2007 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA SITE HP-2 HP-2 HP-5 HP-5 HP-7 HP-7 HP-10 HP-10 MS-LS-104S MW-LS-104S MS-LS-105S MW-LS-105S MW-LS-105S MS-LS-106S MW-LS-106S MS-LS-107S MW-LS-107S MS-LS-111S MW-LS-111S MW-LS-1 11S COLLECTION DATE 04/10/07 10/02/07 04/10/07 10/02/07 04/10/07 10/02/07 04/10/07 10/02/07 04/10/07 10/02/07 04/10/07 EIML 10/02/07 TBE 10/02/07 04/11/07 10/02/07 04/10/07 10/02/07 04/11/07 EIML 10/02/07 TBE 10/02/07 H-3 174 194 169 192 169 192 168 191 171 190 816 534 826 171 192 168 192 165 145 192

+

151 95 166 B-1I 188 of 189

TABLE B-l.1 CONCENTRATIONS OF TRITIUM IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2007 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION DATE SITE SW-LS-101 SW-LS-101 SW-LS-102 SW-LS-102 SW-LS-103 SW-LS-103 SW-LS-104 SW-LS-104 SW-LS-105 SW-LS-105 SW-LS-106 SW-LS-106 H-3 04/11/07 10/01/07 04/11/07 10/01/07 04/11/07 10/01/07 04/11/07 10/01/07 04/11/07 10/01/07 04/11/07 10/01/07

< 172

< 192

< 165

< 194

< 169

< 195

< 170 181 + 114

< 170

< 191

< 167

< 191 B-2 189 of 189

RA08-034, Annual Radiological Environmental Operating Report

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RA08-034, Annual Radiological Environmental Operating Report

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