Text

Annual Radiological Environmental Operating Report, 1 January Through 31 December 2006
	ML071410244
Person / Time
Site:	LaSalle
Issue date:	05/15/2007
From:	; Exelon Nuclear, Teledyne Brown Engineering
To:	; Office of Nuclear Reactor Regulation
References
	FOIA/PA-2010-0209, RA07-041
	Download: ML071410244 (224)
	v • d • e

Docket No: 50-373 50-374 LASALLE COUNTY STATION UNITS I and 2 Annual Radiological Environmental Operating Report 1 January Through 31 December 2006 Prepared By Teledyne Brown Engineering Environmental Services Nuclear LaSalle County Station Marseilles, IL61341 May 2007 1 of 23

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Table Of Contents I. Sum m ary and Conclusions ................................................................................................ 1 II. Introduction ........................................................................................................................ 2 A. Objectives of the REM P ................................................................................... 2 B. Im plem entation of the O bjectives ...................................................................... 2 III. Program Description ................................................................................................... 2 A. Sam ple Collection .............................................................................................. 2 B. Sam ple Analysis ................................................................................................ 5 C. Data Interpretation ........................................................................................... 5 D. Program Exceptions ........................................................................................ 7 E. Program Changes ............................................................................................. 8 IV. Results and Discussion ............................................................................................. 8 A. Aquatic Environm ent ........................................................................................ 8

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

2. Ground/well Water ................................................................................. 9

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

4. Sedim ent ................................................................................................. 9 B. Atm ospheric Environm ent .............................................................................. 10

1. Airbom e ................................................................................................ 10

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

b. Airbom e Iodine ........................................................................ 11

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

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

b. Food Products ........................................................................... 12 C. Ambient G am ma Radiation ........................................................................... 12 D. Land Use Survey ........................................................................................... 12 E. Summary of Results - Inter-laboratory Comparison Program ....................... 13 3 of 234

Appendices Appendix A Radiological Environmental Monitoring Report Summary Tables Table A-1 Radiological Environmental Monitoring Program Summary for the LaSalle County Station, 2006 Appendix B Location Designation, Distance & Direction, and Sample Collection &

Analytical Methods Tables Table B-I: Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, LaSalle County Station, 2006 Table B-2: Radiological Environmental Monitoring Program - Summary of Sample Collection and Analytical Methods, LaSalle County Station, 2006 Figures Figure B-I: Inner Ring TLD Locations of the LaSalle County Station, 2006 Figure B-2: Outer Ring TLD Locations of the LaSalle County Station, 2006 Figure B-3: Fixed Air Sampling Locations of the LaSalle County Station, 2006 Figure B-4: Ingestion and Waterborne Exposure Pathway Sample Locations of the LaSalle County Station, 2006 Appendix C Data Tables and Figures - Primary Laboratory tables Table C-1.1 Concentrations of Gross Beta in Surface Water Samples Collected in the Vicinity of LaSalle County Station, 2006.

Table C-1.2 Concentrations of Tritium in Surface Water Samples Collected in the Vicinity of LaSalle County Station, 2006.

Table C-1.3 Concentrations of Gamma Emitters in Surface Water Samples Collected in the Vicinity of LaSalle County Station, 2006.

Table C-11.1 Concentrations of Tritium in Ground/well Water Samples Collected in the Vicinity of LaSalle County Station, 2006 ii 4 of 234

Table C-1I.2 Concentrations of Gamma Emitters in Ground/well Water Samples Collected In the Vicinity of LaSalle County Station, 2006.

Table C-II1.1 Concentrations of Gamma Emitters in Fish Samples Collected in the Vicinity of LaSalle County Station, 2006.

Table C-IV.1 Concentrations of Gamma Emitters in Sediment Samples Collected in the Vicinity of LaSalle County Station, 2006.

Table C-V. 1 Concentrations of Gross Beta in Air Particulate Samples Collected in the Vicinity of LaSalle County Station, 2006.

Table C-V.2 Monthly and Yearly Mean Values of Gross Beta Concentrations (E-3 pCi/cu meter) in Air Particulate Samples Collected in the Vicinity of LaSalle County Station, 2006.

Table C-V.3 Concentrations of Gamma Emitters in Air Particulate Samples Collected in the Vicinity of LaSalle County Station, 2006.

Table C-VI.1 Concentrations of 1-131 in Air Iodine Samples Collected in the Vicinity of LaSalle County Station, 2006.

Table C-VII.1 Concentrations of 1-131 in Milk Samples Collected in the Vicinity of LaSalle County Station, 2006.

Table C-VII.2 Concentrations of Gamma Emitters in Milk Samples Collected in the Vicinity of LaSalle County Station, 2006.

Table C-VIII.1 Concentrations of Gamma Emitters in Vegetation Samples Collected in the Vicinity of LaSalle County Station, 2006.

Table C-IX.1 Quarterly TLD Results for LaSalle County Station, 2006.

Table C-IX.2 Mean Quarterly TLD Results for the Inner Ring, Outer Ring, Other and Control Locations for LaSalle County Station, 2006.

Table C-IX.3 Summary of the Ambient Dosimetry Program for LaSalle County Station, 2006.

Table C-X.1 Summary of Collection Dates for Samples Collected in the Vicinity of LaSalle County Station, 2006.

Figures Figure C-1 Surface Water - Gross Beta - Stations L-21 and L-40 Collected in the Vicinity of LCS, 2000 - 2006.

Figure C-2 Surface Water - Tritium - Stations L-21 (C) and L-40 Collected in the Vicinity of LCS, 2000 - 2006.

Figure C-3 Air Particulate - Gross Beta - Stations L-01 and L-03 Collected in the Vicinity of LCS, 2000 - 2006.

Figure C-4 Air Particulate - Gross Beta - Stations L-05 and L-06 Collected in the Vicinity of LCS, 2000 - 2006.

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Figure C-5 Air Particulate - Gross Beta - Station L-10 (C) Collected in the Vicinity of LCS, 2000 - 2006.

Figure C-6 Air Particulate - Gross Beta - Station L-04 and L-07 Collected in the Vicinity of LCS, 2006.

Figure C-7 Air Particulate - Gross Beta - Station L-08 and L-1 1 Collected in the Vicinity of LCS, 2006.

Appendix D Inter-Laboratory Comparison Program Tables Table D-1 Analytics Environmental Radioactivity Cross Check Program Teledyne Brown Engineering, 2006 Table D-2 ERA Environmental Radioactivity Cross Check Program Teledyne Brown Engineering, 2006 Table D-3 DOE's Mixed Analyte Performance Evaluation Program (MAPEP)

Teledyne Brown Engineering, 2006 Table D-4 ERA Statistical Summary Proficiency Testing Program Environmental, Inc., 2006 Table D-5 DOE's Mixed Analyte Performance Evaluation Program (MAPEP)

Environmental, Inc., 2006 Appendix E Effluent Data Appendix F Meteorological Data Appendix G Annual Radiological Groundwater Protection Program Report (ARGPPR) iv 6 of 234

I. 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 2006 through 31 December 2006. During that time period, 1,370 analyses were performed on 1,030 samples. In assessing all the data gathered for this report and comparing these results with preoperational data, it was concluded that the operation of LCS had no adverse radiological impact on the environment.

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

Fish (commercially and recreationally important species) and sediment samples were analyzed for concentrations of gamma emitting nuclides. No fission or activation products were detected in fish or sediment. Sediment samples had Cs-1 37 concentrations consistent with levels observed during the preoperational years. No plant produced fission or activation products were found in sediment.

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

High sensitivity 1-131 analyses were performed on bi-weekly air samples. All results were less than the minimum detectable activity.

Cow milk samples were analyzed for concentrations of 1-131 and gamma emitting nuclides. All 1-131 results were below the minimum detectable activity.

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

Food product samples were analyzed for concentrations of gamma emitting nuclides. No fission or activation products were detected.

Environmental gamma radiation measurements were performed quarterly using thermoluminescent dosimeters. Levels detected were consistent with those observed in previous years.

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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 2006 through 31 December 2006.

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.

II1. Program Description A. Sample Collection Samples for the LCS REMP were collected for Exelon Nuclear by 8 of 234

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 2006. Sample locations and descriptions can be found in Tables B-1 and B-2, and Figures B-1 through B-4, Appendix B.

Aqgiitir Fnvironment 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 two locations semiannually, L-40 and L-41.

Atmospheric Environment The atmospheric environment was evaluated by performing radiological analyses on samples of air particulate, airborne iodine, milk and food products. Airborne iodine and particulate samples were collected and analyzed weekly at nine locations (L-01, L-03, L-04, L-05, L-06, L-07, L-08, L-10 and L-11). The control location was L-10. Airbome 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 samples were replaced weekly and air iodine samples were replaced biweekly and sent to the laboratory for analysis.

On 04/13/06, 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 9 of 234

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

Ambient Gsmma Radiation Direct radiation measurements were made using CaF 2 thermoluminescent dosimeters (TLD). Each location consisted of 2 TLD sets. The TLD locations were placed on and around the LCS site as follows:

An innering consisting of 16 locations (L-101, L-102, L-103, L-104, L-105, L-106, L-107, L-108, L-109, L-110, L-111B, L-112, L-113A, L-114, L-1 15 and L-1 16) near and within the site perimeter representing fence post doses (i.e., at locations where the doses will be potentially greater than maximum annual off-site doses) from LCS release.

An outering 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 CaF 2 thermoluminescent phosphors enclosed in plastic - were placed at each location in a PVC conduit located approximately six feet above ground level. The TLDs were exchanged quarterly and sent to Global Dosimetry for analysis.)

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B. Sample Analysis This section describes the general analytical methodologies used by TBE and Environmental Inc (Midwest Labs) to analyze the environmental samples for radioactivity for the LCS REMP in 2006. 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 11 of 234

with the exception that the measurement is an after the fact estimate of the presence of activity.

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

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

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

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

For fish nine nuclides, Mn-54, Co-58, Fe-59, Co-60, Zn-65, Nb/Zr-95, Cs-1 34, Cs-1 37 and BaILa-140 were reported.

For sediment nine nuclides, Mn-54, Co-58, Fe-59, Co-60, Zn-95, Nb/Zr-95, Cs-134, Cs-137 and Ba/La-140 were reported.

For air particulate nine, Mn-54, Co-58, Fe-59, Co-60, Zn-65, Nb/Zr-95, Cs-1 34, Cs-1 37 and Ba/La-140 were reported.

For milk 10 nuclides, Mn-54, Co-58, Fe-59, Co-60, Zn-65, Nb/Zr-95, Cs-134, Cs-137, Ba-140 and La-140 were reported.

For food products 10 nuclides, Mn-54, Co-58, Fe-59, Co-60, Zn-65, Nb/Zr-95, 1-131, Cs-134, Cs-1 37 and Ba/La-140 were reported.

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

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D. Program Exceptions For 2006 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 ANOMALIFS Sample Location Collection Reason Type Code Date A/I L-10 05/25/06 Low reading of 160.8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> possibly due to storms in area.

M L-42 06-30-06 1-131 LLD missed due to problem with the filter paper used in the analysis.

A/I L-06 09/14/06 No electricity; Station Point of Contact notified.

WW L-28 10119/06 No one available at location; collected at City Hall.

Table D-2 LISTING OF MISSED SAMPI FS Sample Location Collection Reason Tvte Code Date TLD Other 06-30-6 TLD -103-1 found collected but not accounted for during scan-in process for reading. 3T quarter TLD was placed.

A/I L-04 07/13/06 Pump running but not pumping; collector removed pump for service; placed pump

640.

Each program exception was reviewed to understand the causes of the program exception. Sampling and maintenance errors were reviewed with the personnel involved to prevent recurrence. Occasional equipment breakdowns and power outages were unavoidable.

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

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E. Program Changes On 04/13/06, the air iodine sample collection was changed from biweekly to weekly sample collection.

A separate program was instituted to monitor groundwater in the surrounding environs during 2006. This program and any sampling and analysis results are discussed in the attached report, "Annual Radiological Groundwater Protection Program Report".

IV. Results and Discussion A. Aquatic Environment I. Surface Water Samples were taken weekly and composited monthly at two locations (L-21 and L-40). Of these locations only L-40 located downstream, could be affected by LaSalle's effluent releases. The following analyses were performed.

GrossBea Samples from all locations were analyzed for concentrations of gross beta (Table C-1.1, Appendix C). The values ranged from 5.1 to 10.5 pCi/l. Concentrations detected were consistent with those detected in previous years (Figure C-1, Appendix C). The required LLD was met.

Quarterly composites of weekly collections were analyzed for tritium activity (Table C-1.2, Appendix C). The values ranged from

<143 to <191 pCi/I. 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.

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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:

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

Gamma Spectrnmetry Samples from all locations were analyzed for gamma emitting nuclides (Table C-11.2, Appendix C). No nuclides were detected, and all required LLDs were met.

3. Fish Fish samples comprised 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 2,340 to 3,990 pCi/kg wet. No fission or activation products were found.

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

Gammn Spectrometry Sediment samples from both locations were analyzed for gamma 15 of 234

emitting nuclides (Table C-IV.1, Appendix C). Nuclides detected were naturally occurring K-40 and Cs-137.

Potassium-40 was found at both stations and ranged from 11,500 to 14,300 pCi/kg dry. Cs-137 was found in one sample at a concentration of 172 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.

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-1 0). The following analyses were performed:

GrossBeta 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 6 to 35 E-3 pCVm 3 with a mean of 20 E-3 pCi/m 3 . The results from the near site location (Group II) ranged from <5 to 37 E-3 pCi/mi3 with a mean of 20 E-3 pCi/m 3 . The results from the far field locations (Group Ill) ranged from 6 to 38 E-3 pCi/m 3 with a mean of 21 E-3 pCi/mi. The results from the Control location (Group IV) ranged from 8 to 38 E-3 pCVm 3 with a mean of 20 E-3 pCVm 3 . Comparison of the 2006 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 16 of 234

values for 2006 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 86 to 263 E-3 pCi/m 3 . Naturally occurring K-40 was detected in 2 samples at concentrations of 23 and 24 E-3 pCi/m3 . 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. The 1-131 LLD was missed on one sample. See the Program Exceptions section III.D for the explanation.

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

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Naturally occurring K-40 activity was found in all samples and ranged from 1,140 to 1,400 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:

Gamma Spectrompfty 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 19 to 41 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-10 were comparable.

D. Land Use Survey A Land Use Survey conducted during the August 2006 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 ft2 in each of the sixteen 22 % degree sectors around the site. The distance and direction of all locations from the LCS reactor buildings were positioned using Global Positioning System (GPS) technology. There were no changes required to the LCS REMP, as a result of this survey.

The results of this survey are summarized below.

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Distance in Miles from the LCS Reactor Buildings Sector Residence Livestock Milk Farm Miles Miles Miles AN 3.9 4.0 B NNE 1.6 1.7 CNE 2.1 3.5 D ENE 3.3 3.8 EE 3.2 - 14.2 F ESE 1.4 -

G SE 1.7 4.7 H SSE 1.8 4.7 JS 1.5 4.7 K SSW 0.7 - -

L SW 1.0 5.8 -

MWSW 1.5 1.5 -

NW 1.5 3.0 -

P WNW 0.9 3.0 Q NW 1.8 4.0 R NNW 1.7 4.6 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.

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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, 24 out of 28 analytes met the specified acceptance criteria. Four samples did not meet the specified acceptance criteria for the following reasons:

1. Teledyne Brown Engineering's MAPEP Series 15 January 2006 soil Cs-134 was evaluated as a false positive, although TBE considered the result a non-detect due to the peak not being identified by the gamma software. MAPEP suggests the Bi-214 is not being differentiated from the Cs-1 34 peak. When the ratio of activity to uncertainty exceeds 3, TBE will use a key line analysis rather than a weighted mean analysis when evaluating MAPEP non-detects.

2. Teledyne Brown Engineering's MAPEP Series 15 January 2006 Sr-90 in vegetation result of 2.22 Bq/kg exceeded the upper acceptance range of 2.029 Bq/kg. The samples were analyzed in triplicate and the results averaged. One high result of 2.43 Bq/kg biased the submitted results on the high side. TBE was unable to determine the cause for the higher result. The Sr-90 in vegetation results for MAPEP Series 14 and MAPEP Series 16 were acceptable. No client samples were analyzed during the MAPEP Series 14 time period.

3. Teledyne Brown Engineering's MAPEP Series 15 January 2006 Pu-238 and Pu-239/240 in vegetation result of 2.22 Bq/kg failed the required acceptance ranges. TBE was evaluating the current preparation method for vegetation samples, which proved insufficient for the analyses. TBE does not perform isotopic Pu on client's vegetation samples.

For the secondary laboratory, 20 out of 25 analytes met the specified acceptance criteria. Seven samples did not meet the specified 20 of 234

acceptance criteria for the following reasons:

1. Environmental Inc.'s ERA November 2006 water 1-131 result of 28.4 pCi/L exceeded the upper control limit of 27.3 pCi/L. The reported result was an average of three analyses, results ranged from 25.36 pCi/L to 29.23 pCi/L. A fourth analysis was performed, with a result of 24.89 pCi/L.

2. Environmental Inc.'s MAPEP January 2006 vegetation Pu-238 result of 0.08 Bq/sample exceeded the lower control limit of 0.10 Bq/sample due to incomplete dissolution of the sample.

3. Environmental Inc.'s MAPEP January 2006 air particulate Pu-238 result of 0.03 Bq/sample exceeded the lower control limit of 0.05 Bq/sample due to incomplete dissolution of the sample.

4. Environmental Inc.'s MAPEP January 2006 soil Pu-238, Pu-239/240, U-233/234 and U-238 results of 14.6, 14.6, 13.5 and 15.4 Bq/kg, respectively, exceeded the lower control limits of 42.81, 32.09, 25.9 and 27.2 Bq/kg, respectively, due to incomplete dissolution of the sample.

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

21 of 234

APPENDIX A RADIOLOGICAL ENVIRONMENTAL MONITORING REPORT QUARTERLY AND ANNUAL

SUMMARY

22 of 234

TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 1ST QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2006 NAME OF FACILITY: LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY: MARSEILLES, IL REPORTING PERIOD: 1ST QUARTER, 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS SURFACE WATER GR-B 6 4 8.3 7.7 8.3 L-40 INDICATOR 0 (PCI/LITER) (3/3) (3/3) (3/3) ILLINOIS RIVER - DOWNSTREAM (7.3/10.1) (6.8/8.7) (7.3/10.1) 5.2 MILES NNW OF SITE H-3 2 200 191 189 191 L-40 INDICATOR 0 (0/1) (0/1) (0/1) ILLINOIS RIVER - DOWNSTREAM

(<191) (<189) (<191) 5.2 MILES NNW OF SITE

>I GAMMA 6 MN-54 15 I 1 1 L-21 CONTROL (0/3) (0/3) (0/3) ILLINOIS RIVER AT SENECA - UPSTREAM

(<1/<2) (<I/<2) (<I/<2) 4.0 MILES NE OF SITE CO-58 15 2 2 2 L-21 CONTROL (0/3) (0/3) (0/3) ILLINOIS RIVER AT SENECA - UPSTREAM

(<I/<2) (<I/<3) (<I/<3) 4.0 MILES NE OF SITE FE-59 30 4 4 4 L-21 CONTROL (0/3) (0/3) (0/3) ILLINOIS RIVER AT SENECA - UPSTREAM

(<3/<6) (<3/<6) (<3/<6) 4.0 MILES NE OF SITE CO-60 15 1 2 2 L-21 CONTROL (0/3) (0/3) (0/3) ILLINOIS RIVER AT SENECA - UPSTREAM

(<1/<2) (<1/<2) (<I/<2) 4.0 MILES NE OF SITE ZN-65 30 3 3 3 L-21 CONTROL (0/3) (0/3) (0/3) ILLINOIS RIVER AT SENECA - UPSTREAM

(<2/<4) (<2/<5) (<2/<5) 4.0 MILES NE OF SITE NB-95 15 2 2 2 L-21 CONTROL (0/3) (0/3) (0/3) ILLINOIS RIVER AT SENECA - UPSTREAM

(<1/<3) (<1/<3) (<i/<3) 4.0 MILES NE OF SITE

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING BOTH THE MDAs AND THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F) 4ýL

TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 1ST QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2006 NAME OF FACILITY: LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY: MARSEILLES, IL REPORTING PERIOD: IST QUARTER, 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS SURFACE WATER ZR-95 30 3 3 3 L-21 CONTROL (PCI/LITER) (0/3) (0/3) (0/3) ILLINOIS RIVER AT SENECA - UPSTREAM

(<2/<4) (<2/<5) (<2/<5) 4.0 MILES NE OF SITE 1-131 15 11 11 11 L-21 CONTROL (0/3) (0/3) (0/3) ILLINOIS RIVER AT SENECA - UPSTREAM

(<8/<13) (<9/<13) (<9/<13) 4.0 MILES NE OF SITE CS-134 15 1 1 1 L-21 CONTROL t'3 (0/3) (0/3) (0/3) ILLINOIS RIVER AT SENECA - UPSTREAM

(<1/<2) (<1/<2) (<11<2) 4.0 MILES NE OF SITE CS-137 18 1 1 1 L-21 CONTROL (0/3) (0/3) (0/3) ILLINOIS RIVER AT SENECA - UPSTREAM

(<1/<2) (<11<2) (<I/<2) 4.0 MILES NE OF SITE BA-140 60 24 27 27 L-21 CONTROL (0/3) (0/3) (0/3) ILLINOIS RIVER AT SENECA -UPSTREAM

(<16/<40) (<17/<44) (<17/<44) 4.0 MILES NE OF SITE LA-140 15 8 9 9 L-21 CONTROL (0/3) (0/3) (0/3) ILLINOIS RIVER AT SENECA - UPSTREAM

(<5/<13) (<5/<15) (<51<15) 4.0 MILES NE OF SITE GROUND WATER H-3 2 200 167 N/A 168 L-28 INDICATOR (PCI/LITER) (0/2) (0/1) MARSEILLES WELL

(<1661<168) (<168) 7.0 MILES NW OF SITE GAMMA 2 MN-54 15 8 N/A 8 L-27 INDICATOR 0 (0/2) (0/1) LSCS ONSITE WELL

(<&/<8) (<8) 0 MILES AT STATION OF SITE

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING BOTH THE MDAS AND THE POSITIVE VALUES v

-'4 FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM IST QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2006 NAME OF FACILITY: LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY: MARSEILLES, IL REPORTING PERIOD: IST QUARTER, 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS GROUND WATER CO-58 15 8 N/A 8 L-28 INDICATOR 0 (PCIILrrER) (0/2) (0/1) MARSEILLES WELL

(<&/<8) (<8) 7.0 MILES NW OF SITE FE-59 30 15 N/A 18 L-27 INDICATOR (0/2) (0/1) LSCS ONSITE WELL

(<12/<18) (<18) 0 MILES AT STATION OF SITE

! CO-60 15 9 N/A 11 L-27 INDICATOR t*

(0/2) (0/1) LSCS ONSITE WELL

(<7/<11) (<11) 0 MILES AT STATION OF SITE ZN-65 30 18 N/A 22 L-27 INDICATOR (0/2) (0/1) LSCS ONSITE WELL

(<13/<22) (<22) 0 MILES AT STATION OF SITE NB-95 15 8 N/A L.27 INDICATOR (0/2) (0/1) LSCS ONSITE WELL

(<7/<8) (<8) 0 MILES AT STATION OF SITE ZR-95 30 12 N/A 14 L-27 INDICATOR (0/2) (o/1) LSCS ONSITE WELL

(<11/<14) (<14) 0 MILES AT STATION OF SITE 1-131 15 11 N/A 13 L-27 INDICATOR (0/2) (0/I) LSCS ONSITE WELL

(<9/<13) (<13) 0 MILES AT STATION OF SITE CS-134 15 8 N/A 8 L-28 INDICATOR (0/2) (0/1) MARSEILLES WELL

(<8/<8) (<8) 7.0 MILES NW OF SITE

" THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING BOTH THE MDAS AND THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F) 4N,

TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 1ST QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2006 NAME OF FACILITY: LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY: MARSEILLES, IL REPORTING PERIOD: 1ST QUARTER, 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS GROUND WATER CS-137 18 7 N/A 8 L-27 INDICATOR 0 (PCI/LrrER) (0/2) (0/1) LSCS ONSITE WELL

(<6/<8) (<8) 0 MILES AT STATION OF SITE BA-140 60 33 N/A 39 L-27 INDICATOR 0 (0/2) (0/1) LSCS ONSITE WELL

(<27/<39) (<39) 0 MILES AT STATION OF SITE 4* LA-140 15 13 N/A 13 L-27 INDICATOR 0 (0/2) (0/1) LSCS ONSITE WELL

(<12/<13) (<13) 0 MILES AT STATION OF SITE AIR PARTICULATE GR-B 117 10 19 19 20 L-04 INDICATOR 0 (E-3 PClICU.METER) (104/104) (13/13) (13/13) RTE. 170 (10&29) (11/28) (13/29) 3.2 MILES E OF SITE GAMMA 9 MN-54 N/A 4.9 5.7 6.8 L-08 INDICATOR 0 (0/8) (0/1) (0/1) MARSEILLES

(< 2.9/< 6.8) (< 5.7) (< 6.8) 6.0 MILES NNW OF SITE CO-58 N/A 11.5 12.1 18.5 L-08 INDICATOR 0 (0/8) (0/1) (0/1) MARSEILLES

(< 8.1/<18.5) (<12.1) (<18.5) 6.0 MILES NNW OF SITE FE-59 N/A 50.5 61.9 72.7 L-05 INDICATOR 0 (0/8) (0/1) (0/1) ONSITE 5

(<22/<72.7) (<61.9) (<72.7) 0.3 MILES ESE OF SITE CO-60 N/A 4.5 3.7 6.6 L-08 INDICATOR 0 (0/8) (0/1) (0/1) MARSEILLES

(< 3.3/< 6.6) (<3.7) (< 6.6) 6.0 MILES NNW OF SITE 0 THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING BOTH THE MDAS AND THE POSTVE VALUES

'-9, FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 1ST QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2006 NAME OF FACILITY: LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY: MARSEILLES, IL REPORTING PERIOD: 1ST QUARTER, 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS AIR PARTICULATE ZN-65 N/A 11.1 11.7 15.1 L-04 INDICATOR 0 (E-3 PCI/CU.METER) (0/8) (0/1) (0/1) RTE. 170

(<6.0/<15.1) (<11.7) (<15.1) 3.2 MILES E OF SITE ZRNB-95 N/A 12.9 12.6 16.1 L-03 INDICATOR 0 (0/8) (0/1) (0/1) ONSITE 3

(<9.6/<16.1) (<12.6) (<16.1) 1.0 MILES ENE OF SITE LA CS-134 50 4.8 4.2 6.5 L-08 INDICATOR 0 (0/8) (0/1) (0/1) MARSEILLES

(< 4.01< 6.5) (<4.2) (< 6.5) 6.0 MILES NNW OF SITE CS-137 60 3.9 3.6 4.9 L-05 INDICATOR 0 (0/8) (0/1) (0/1) ONSITE 5

(< 2.3/< 4.9) (<3.6) (<4.9) 0.3 MILES ESE OF SITE BALAI40 N/A 3062.5 1810 3740 L-04 INDICATOR 0 (0/8) (0/1) (0/1) RTE. 170

(<1850/<3740) (<1810) (<3740) 3.2 MILES E OF SITE AIR IODINE GAMMA 63 (E-3 PCI/CU.METER) 1-131 70 35 36 37 L-04 INDICATOR 0 (0/56) (0/7) (0/7) RTE. 170

(<19/<42) (<30/<41) (<261<42) 3.2 MILES E OF SITE MILK 1-131 3 I N/A 0.5 0.5 L-42 CONTROL 0 (PCI/LITER) (0/3) (0/3) BIROS FARM

(< 0.4/< 0.6) (< 0.4/< 0.6) 14.2 MILES E OF SITE ti THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING BOTH THE MDAs AND THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F) 4ý6

TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 1ST QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2006 NAME OF FACILITY: LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY: MARSEILLES, IL REPORTING PERIOD: 1ST QUARTER, 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS MILK GAMMA 3 (PCI/LITER) MN-54 N/A N/A 8 8 L-42 CONTROL (0/3) (0/3) BIROS FARM

(<6/<g) (<6/<8) 14.2 MILES E OF SITE CO-59 N/A N/A 8 8 L-42 CONTROL 0 (0/3) (0/3) BIROS FARM

(<7/<9) (<7/<9) 14.2 MILES E OF SITE a

FE-59 N/A N/A 18 18 L-42 CONTROL 0 (0/3) (0/3) BIROS FARM

(<16/<20) (<16/<20) 14.2 MILES E OF SITE CO-60 N/A N/A 8 8 L-42 CONTROL 0 (0/3) (0/3) BIROS FARM

(<7/<9) (<7/<9) 14.2 MILES E OF SITE ZN-65 N/A N/A 21 21 L-42 CONTROL 0 (0/3) (0/3) BIROS FARM

(<17/<24) (<17/<24) 14.2 MILES E OF SITE ZRNB-95 N/A N/A 8 8 L-42 CONTROL 0 (0/3) (0/3) BIROS FARM

(<7/<9) (<7/<9) 14.2 MILES E OF SITE CS-134 15 N/A 10 10 L-42 CONTROL 0 (0/3) (0/3) BIROS FARM

(<7/<l 1) (<7/<lI) 14.2 MILES E OF SITE CS-137 18 N/A 8 8 L-42 CONTROL 0 (0/3) (0/3) BIROS FARM

(<7/<9) (<7/<9) 14.2 MILES E OF SITE 00) 00

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

TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 1ST QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2006 NAME OF FACILITY: LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY: MARSEILLES, IL REPORTING PERIOD: 1ST QUARTER, 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS MILK BA-140 60 N/A 38 38 L-42 CONTROL 0 (PCI/LrTER) (0/3) (0/3) BIROS FARM

(<33/<44) (<33/<44) 14.2 MILES E OF SITE LA-140 15 N/A 10 10 L-42 CONTROL 0 (0/3) (0/3) BIROS FARM

(<8/<10) (<S/<10) 14.2 MILES E OF SITE DIRECT RADIATION TLD-QUARTERLY 82 N/A 29 26 33 L- 102-2 INDICATOR 0

!J (MILLI.ROENTGEN/QTR.) (80/80) (2/2) (1/I)

(21/33) (24/28) (33) 0.6 MILES NNE OF SITE t'3

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING BOTH THE MDAs AND THE POSITIVE VALUES 0* FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 2ND QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2006 NAME OF FACILITY: LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY: MARSEILLES, IL REPORTING PERIOD: 2ND QUARTER, 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS SURFACE WATER GR-B 6 4 6.8 7.8 7.8 L-21 CONTROL 0 (PCII/LITER) (3/3) (3/3) (3/3) ILLINOIS RIVER AT SENECA - UPSTREAM (5.1/9.2) (5.6/10.5) (5.6/10.5) 4.0 MILES NE OF SITE H-3 200 174 174 174 L-21 CONTROL 0 (0/1) (0/1) (0/1) ILLINOIS RIVER AT SENECA - UPSTREAM

(<174) (<174) (<174) 4.0 MILES NE OF SITE GAMMA 6 00 MN-54 15 2 2 2 L-21 CONTROL 0 (0/3) (0/3) (0/3) ILLINOIS RIVER AT SENECA - UPSTREAM

(<I/<2) (<I/<2) (<I/<2) 4.0 MILES NE OF SITE CO-58 15 2 2 2 L-40 INDICATOR 0 (0/3) (0/3) (0/3) ILLINOIS RIVER - DOWNSTREAM

(<2/<3) (<2/<3)

(<2/<3) 5.2 MILES NNW OF SITE FE-59 30 5 5 5 L-21 CONTROL 0 (0/3) (0/3) (0/3) ILLINOIS RIVER AT SENECA - UPSTREAM

(<4/<7) (<4/<7) (<4/<7) 4.0 MILES NE OF SITE CO-60 15 2 2 2 L-21 CONTROL 0 (0/3) (0/3) (0/3) ILLINOIS RIVER AT SENECA - UPSTREAM

(<1/<2) (<i/<3) (<11<3) 4.0 MILES NE OF SITE ZN-65 30 4 4 4 L-21 CONTROL 0 (0/3) (0/3) (0/3) ILLINOIS RIVER AT SENECA - UPSTREAM

(<3/<5) (<3/<5) (<3/<5) 4.0 MILES NE OF SITE NB-95 15 2 2 2 L-21 CONTROL 0 (0/3) (0/3) (0/3) ILLINOIS RIVER AT SENECA - UPSTREAM

(<21<3) (<2/<3) (<2/<3) 4.0 MILES NE OF SITE 0

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

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 2ND QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2006 NAME OF FACILITY: LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY: MARSEILLES, IL REPORTING PERIOD: 2ND QUARTER, 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS SURFACE WATER ZR-95 30 4 4 4 L-21 CONTROL 0 (PCI/LIrER) (0/3) (0/3) (0/3) ILLINOIS RIVER AT SENECA - UPSTREAM

(<3/<5) (<3/<5) (<3/<5) 4.0 MILES NE OF SITE 1-131 15 12 12 12 L.40 INDICATOR 0 (0/3) (0/3) (0/3) ILLINOIS RIVER - DOWNSTREAM

(<91<15) (<101<14) (<91<15) 5.2 MILES NNW OF SITE CS-134 15 2 2 2 L-40 INDICATOR 0

'0D (0/3) (0/3) (0/3) ILLINOIS RIVER - DOWNSTREAM

(<1/<2) (<I/<2) (<11<2) 5.2 MILES NNW OF SITE CS-137 18 2 2 2 L-21 CONTROL 0 (0/3) (0/3) (0/3) ILLINOIS RIVER AT SENECA - UPSTREAM

(<1/<2) (<1/<2) (<i/<2) 4.0 MILES NE OF SITE BA-140 60 34 35 35 L-21 CONTROL 0 (0/3) (0/3) (0/3) ILLINOIS RIVER AT SENECA - UPSTREAM

(<21/<41) (<20/<43) (<2o/<43) 4.0 MILES NE OF SITE LA-140 15 12 12 12 L-21 CONTROL 0 (0/3) (0/3) (0/3) ILLINOIS RIVER AT SENECA - UPSTREAM

(<7/<14) (<61<15) (<6/<15) 4.0 MILES NE OF SITE GROUND WATER H-3 2 200 174 N/A 176 L-28 INDICATOR 0 (PCI/LITER) (0/2) (0/1) MARSEILLES WELL

(<171/<176) (<176) 7.0 MILES NW OF SITE GAMMA 2 MN-54 15 3 N/A 3 L-28 INDICATOR 0 (0/2) (0/I) MARSEILLES WELL

(<2/1<3) (<3) 7.0 MILES NW OF SITE 0~

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

TABLE A-i RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 2ND QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2006 NAME OF FACILITY: LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY: MARSEILLES, IL REPORTING PERIOD: 2ND QUARTER, 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS GROUND WATER CO-58 15 3 N/A 3 L-28 INDICATOR 0 (PC*LrrER) (0/2) (0/1) MARSEILLES WELL

(<3/<3) (<3) 7.0 MILES NW OF SITE FE-59 30 6 N/A 6 L-28 INDICATOR 0 (0/2) (0/1) MARSEILLES WELL

(<5/<6) (<6) 7.0 MILES NW OF SITE CO-60 15 3 N/A 3 L-28 INDICATOR 0 0

(0/2) (0/1) MARSEILLES WELL

(<3/<3) (<3) 7.0 MILES NW OF SITE ZN-65 30 6 N/A 6 L-28 INDICATOR 0 (0/2) (0/1) MARSEILLES WELL

(<6/<6) (<6) 7.0 MILES NW OF SITE NB-95 15 3 N/A 3 L-28 INDICATOR 0 (0/2) (0/1) MARSEILLES WELL

(<3/<3) (<3) 7.0 MILES NW OF SITE ZR-95 30 5 N/A 5 L-28 INDICATOR 0 (0/2) (0/I) MARSEILLES WELL

(<4/<5) (<5) 7.0 MILES NW OF SITE 1-131 15 7 N/A 8 L-28 INDICATOR 0 (0/2) (0/1) MARSEILLES WELL

(<7/<8) (<8) 7.0 MILES NW OF SITE CS-134 15 3 N/A 3 L-28 INDICATOR 0 (0/2) (0/1) MARSEILLES WELL

(<3/<3) (<3) 7.0 MILES NW OF SITE

0.

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING BOTH THE MDAs AND THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F) 4*3

TABLE A-i RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 2ND QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2006 NAME OF FACILITY: LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY: MARSEILLES, IL REPORTING PERIOD: 2ND QUARTER, 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS GROUND WATER CS-137 18 3 N/A 3 L-28 INDICATOR 0 (PCI/LITER) (0/2) (0/1) MARSEILLES WELL

(<3/<3) (<3) 7.0 MILES NW OF SITE BA-140 60 17 N/A 18 L-28 INDICATOR 0 (0/2) (0/1) MARSEILLES WELL

(<16/<18) (<18) 7.0 MILES NW OF SITE

>t LA-140 15 6 N/A 6 L-28 INDICATOR 0 trot (0/2) (0/1) MARSEILLES WELL

(<5/<6) (<6) 7.0 MILES NW OF SITE FISH GAMMA 6 (PCI/KG WET) MN-54 130 70 67 73 L-34 INDICATOR 0 (0/4) (0/2) (0/2) LASALLE COOLING LAKE

(<45/<100) (<65/<69) (<45/<100) 2.0 MILES E OF SITE CO-58 130 80 76 84 L-35 INDICATOR 0 (0/4) (0/2) (0/2) MARSEILLES POOL OF ILLINOIS RIVER - DOWN

(<54/<108) (<73/<79) (<61/<108) 6.5 MILES NW OF SITE FE-59 260 170 147 172 L-35 INDICATOR 0 (0/4) (0/2) (0/2) MARSEILLES POOL OF ILLINOIS RIVER - DOWN

(<120/<218) (<1441<150) (<140/<203) 6.5 MILES NW OF SITE CO-60 130 73 68 73 L-34 INDICATOR 0 (0/4) (0/2) (0/2) LASALLE COOLING LAKE

(<58/<88) (<67/<68) (<58/<88) 2.0 MILES E OF SITE ZN-65 260 180 155 1983 L-34 INDICATOR 0 (0/4) (0/2) (0/2) LASALLE COOLING LAKE

(<128/<237) (<149/<160) (<128/<237) 2.0 MILES E OF SITE 0*

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

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 2ND QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2006 NAME OF FACILITY: LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY: MARSEILLES, IL REPORTING PERIOD: 2ND QUARTER, 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS FISH ZRNB-95 N/A 80 80 81 L-35 INDICATOR 0 (PCI/KG WETI) (0/4) (0/2) (0/2) MARSEILLES POOL OF ILLINOIS RIVER - DOWN

(<531<105) (<78/<S1) (<58/<103) 6.5 MILES NW OF SITE CS-134 130 74 64 78 L-35 INDICATOR 0 (0/4) (0/2) (0/2) MARSEILLES POOL OF ILLINOIS RIVER - DOWN

(<47/<93) (<60/<69) (<63/<93) 6.5 MILES NW OF SITE ka=t CS-137 150 74 70 82 L-35 INDICATOR 0 (0/4) (0/2) (0/2) MARSEILLES POOL OF ILLINOIS RIVER - DOWN

(<47/<98) (<59/<30) (<65/<98) 6.5 MILES NW OF SITE BALAI40 N/A 204 176 204 L-34 INDICATOR 0 (0/4) (0/2) (0/2) LASALLE COOLING LAKE

(<1331<275) (<1541<197) (<133/<275) 2.0 MILES E OF SITE SEDIMENT GAMMA 2 (PCI/KG DRY) MN-54 N/A 76 N/A 92 L-40 INDICATOR 0 (0/2) (0/1) ILLINOIS RIVER - DOWNSTREAM

(<60/<92) (<92) 5.2 MILES NNW OF SITE CO-58 N/A 78 N/A 89 L-40 INDICATOR 0 (0/2) (0/1) ILLINOIS RIVER - DOWNSTREAM

(<67/<89) (<89) 5.2 MILES NNW OF SITE FE-59 N/A 196 N/A 215 L-40 INDICATOR 0 (0/2) (0/1) ILLINOIS RIVER - DOWNSTREAM

(<176t<215) (<215) 5.2 MILES NNW OF SITE CO-60 N/A 77 N/A 81 L-40 INDICATOR 0 (0/2) (0/1) ILLINOIS RIVER - DOWNSTREAM

(<73/<81) (<81) 5.2 MILES NNW OF SITE 0)

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

TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 2ND QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2006 NAME OF FACILITY: LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY: MARSEILLES, IL REPORTING PERIOD: 2ND QUARTER, 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS SEDIMENT ZN-65 N/A 204 N/A 213 L-40 INDICATOR 0 (PCI/KG DRY) (0/2) (0/1) ILLINOIS RIVER - DOWNSTREAM

(<194/<213) (<213) 5.2 MILES NNW OF SITE ZRNB-95 N/A 87 N/A 97 L-40 INDICATOR 0 (0/2) (0/1) ILLINOIS RIVER - DOWNSTREAM

(<77/<97) (<97) 5.2 MILES NNW OF SITE t,,,,,,a CS-134 150 86 N/A 98 L-40 INDICATOR 0 taa (0/2) (0/1) ILLINOIS RIVER . DOWNSTREAM

(<75/<98) (<98) 5.2 MILES NNW OF SITE CS-137 180 85 N/A 97 L-40 INDICATOR 0 (0/2) (0/1) ILLINOIS RIVER - DOWNSTREAM

(<74/<97) (<97) 5.2 MILES NNW OF SITE BALA140 N/A 166 N/A 169 L-40 INDICATOR 0 (0/2) (0/1) ILLINOIS RIVER - DOWNSTREAM

(<162/<169) (<169) 5.2 MILES NNW OF SITE AIR PARTICULATE GR-B 117 10 16 15 17 L- 1IINDICATOR 0 (E-3 PCI/CU.METER) (103/104) (13/13) (13/13) RANSOM

(<5/25) (8/25) (8/24) 6.0 MILES S OF SITE GAMMA 9 MN-54 N/A 4.2 3.2 6.0 L-04 INDICATOR 0 (0/8) (0/i) (0/0) RTE. 170

(< 2.7/< 6.0) (< 3.2) (<6.0) 3.2 MILES E OF SITE CO-58 N/A 10.4 9.6 13.8 L-06 INDICATOR 0 (0/8) (0/1) (0/1) NEARSITE 6

(< 6.3/<13.8) (< 9.6) (<13.8) 0.4 MILES WSW OF SITE w

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

TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 2ND QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2006 NAME OF FACILITY: LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY: MARSEILLES, IL REPORTING PERIOD: 2ND QUARTER, 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS AIR PARTICULATE FE-59 N/A 29.2 30.2 35.8 L-04 INDICATOR 0 (E-3 PCI/CU.METER) (0/8) (0/1) (0/1) RTE. 170

(<12.1/<35.g) (<30.2) (<35.8) 3.2 MILES E OF SITE CO-60 N/A 3.5 4.8 4.8 L-10 CONTROL 0 (0/8) (0/1) (0/1) STREATOR

(< 2.9/< 4.5) (< 4.8) (< 4.8) 13.5 MILES SW OF SITE ZN-65 N/A 10.4 12.1 15.1 L-01 INDICATOR 0

-pa (0/8) (0/i) (0/1) NEARSITE 1

(< 6.3/<15.1) (<12.1) (<15.1) 1.5 MILES NNW OF SITE ZRNB-95 N/A 8.7 8.5 13.2 L-08 INDICATOR 0 (0/8) (0/1) (0/1) MARSEILLES

(<4.5/<13.2) (<8.5) (<13.2) 6.0 MILES NNW OF SITE CS-134 50 4.0 3.6 5.6 L-04 INDICATOR 0 (0/8) (0/1) (0/1) RTE. 170

(< 1.51< 5.6) (< 3.6) (< 5.6) 3.2 MILES E OF SITE CS-137 60 3.3 3.3 4.7 L-04 INDICATOR 0 (0/8) (0/1) (0/1) RTE. 170

(< 1.6/< 4.7) (< 3.3) (< 4.7) 3.2 MILES E OF SITE BALAI40 N/A 1305.4 303 2210 L-08 INDICATOR 0 (0/8) (0/1) (0/1) MARSEILLES

(<655/<2210) (<303) (<2210) 6.0 MILES NNW OF SITE AIR IODINE GAMMA 108 (E-3 PCI/CU.METER) 1-131 70 57 59 60 L-03 INDICATOR 0 (0/96) (0/12) (0/12) ONSITE 3

(<23/<70) (<43/<70) (<39/<68) 1.0 MILES ENE OF SITE 0*

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

TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 2ND QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2006 NAME OF FACILITY: LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY: MARSEILLES, IL REPORTING PERIOD: 2ND QUARTER, 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS MILK 1-131 6 I N/A 1.0 1.0 L-42 CONTROL 0 (PCI/LrrER) (0/6) (0/6) BIROS FARM

(< 0.3/< 2.9) (< 0.3/< 2.9) 14.2 MILES E OF SITE GAMMA 6 MN-54 N/A N/A 8 8 L-42 CONTROL 0 (0/6) (0/6) BIROS FARM

(<51<10) (<5/<10) 14.2 MILES E OF SITE I.A N/A N/A 8 8 L-42 CONTROL 0 CO-58 (0/6) (0/6) BIROS FARM

(<5/<9) (<5/<9) 14.2 MILES E OF SITE FE-59 N/A N/A 19 19 L-42 CONTROL 0 (0/6) (0/6) BIROS FARM

(<12/<23) (<12/<23) 14.2 MILES E OF SITE CO-60 N/A N/A 9 9 L-42 CONTROL 0 (0/6) (0/6) BIROS FARM

(<6/<12) (<6/<12) 14.2 MILES E OF SITE ZN-65 N/A N/A 20 20 L-42 CONTROL 0 (0/6) (0/6) BIROS FARM

(<12/<25) (<12/<25) 14.2 MILES E OF SITE ZRNB-95 N/A N/A 9 9 L-42 CONTROL 0 (0/6) (0/6) BIROS FARM

(<51<11) (<5/<11) 14.2 MILES E OF SITE CS-134 15 N/A 9 9 L-42 CONTROL 0 (0/6) (0/6) BIROS FARM

(<5/<13) (<5/<13) 14.2 MILES E OF SITE

-.4 THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING BOTH THE MDAS AND THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F) p4,

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 2ND QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2006 NAME OF FACILITY: LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY: MARSEILLES, IL REPORTING PERIOD: 2ND QUARTER, 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS MILK CS-137 18 N/A 8 8 L-42 CONTROL 0 (PCILITER) (0/6) (0/6) BIROS FARM

(<51<11) (<5/<11) 14.2 MILES E OF SITE BA-140 60 N/A 41 41 L-42 CONTROL 0 (0/6) (0/6) BIROS FARM

(<27/<51) (<27/<51) 14.2 MILES E OF SITE LA-140 15 N/A 13 13 L-42 CONTROL 0

-A (0/6) (0/6) BIROS FARM

(<9/<15) (<9/<15) 14.2 MILES E OF SITE DIRECT RADIATION TLD-QUARTERLY 81 N/A 24 19 29 L-210-2 INDICATOR 0 (MILLI-ROENTGEN/QTR.) (79/79) (2/2) (1/1)

(19/29) (19/19) (29) 3.3 MILES SW OF SITE 00

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING BOTH THE MDAs AND THE POSITIVE VALUES 0* FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 3RD QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2006 NAME OF FACILITY: LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY: MARSEILLES, IL REPORTING PERIOD: 3RD QUARTER, 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS SURFACE WATER GR-B 6 4 8.8 7.5 8.8 L-40 INDICATOR 0 (PCIlLITER) (3/3) (3/3) (3/3) ILLINOIS RIVER - DOWNSTREAM (8.2/9.4) (6.3/8.3) (8.2/9.4) 5.2 MILES NNW OF SITE H-3 2 200 178 175 178 L-40 INDICATOR 0 (0/1) (0/1) (0/1) ILLINOIS RIVER - DOWNSTREAM

(<178) (<175) (<178) 5.2 MILES NNW OF SITE

-J GAMMA 6 MN-54 15 1 1 1 L-40 INDICATOR 0 (0/3) (0/3) (0/3) ILLINOIS RIVER - DOWNSTREAM

(<O/<2) (<I/<I) (<0/<2) 5.2 MILES NNW OF SITE CO-58 15 1 1 1 L-40 INDICATOR 0 (0/3) (0/3) (0/3) ILLINOIS RIVER - DOWNSTREAM

(<1/<2) (<I/<I) (<i/<2) 5.2 MILES NNW OF SITE FE-59 30 3 3 3 L-40 INDICATOR 0 (0/3) (0/3) (0/3) ILLINOIS RIVER - DOWNSTREAM

(<2/<4) (<2/<3) (<2/<4) 5.2 MILES NNW OF SITE CO-60 15 1 1 1 L-40 INDICATOR 0 (0/3) (0/3) (0/3) ILLINOIS RIVER - DOWNSTREAM

(<o/<2) (<I/<I) (<0/<2) 5.2 MILES NNW OF SITE ZN-65 30 2 2 2 L-40 INDICATOR 0 (0/3) (0/3) (0/3) ILLINOIS RIVER - DOWNSTREAM

(<1/<3) (<1/<2) (<1/<3) 5.2 MILES NNW OF SITE NB-95 15 1 L-40 INDICATOR 0 (0/3) (0/3) (0/3) ILLINOIS RIVER - DOWNSTREAM

'C (<11<2) (<I/<2) (<i/<2) 5.2 MILES NNW OF SITE 0 THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING BOTH THE MDAs AND THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F) 4*3

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 3RD QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2006 NAME OF FACILITY: LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY: MARSEILLES, IL REPORTING PERIOD: 3RD QUARTER, 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS SURFACE WATER ZR-95 30 2 2 2 L-40 INDICATOR 0 (PCI/LrrER) (0/3) (0/3) (0/3) ILLINOIS RIVER - DOWNSTREAM

(<1/<3) (<1/<3) (<1/<3) 5.2 MILES NNW OF SITE 1-131 15 12 12 12 L-40 INDICATOR 0 (0/3) (0/3) (0/3) ILLINOIS RIVER - DOWNSTREAM

(<11/<14) (<71<15) (<11/<14) 5.2 MILES NNW OF SITE CS-134 15 1 1 1 L-40 INDICATOR 0 00 (0/3) (0/3) (0/3) ILLINOIS RIVER - DOWNSTREAM.

(<o/<1) (<i/<1) 5.2 MILES NNW OF SITE

(<O/<I)

CS-137 18 I 1 L-40 INDICATOR 0 (0/3) (0/3) (0/3) ILLINOIS RIVER - DOWNSTREAM

(<o/<2) (<O/<l) (<D/<2) 5.2 MILES NNW OF SITE BA-140 60 16 16 16 L-40 INDICATOR 0 (0/3) (0/3) (0/3) ILLINOIS RIVER - DOWNSTREAM

(<14/<18) (<13/<19) (<14/<18) 5.2 MILES NNW OF SITE LA-140 15 5 6 6 L-21 CONTROL 0 (0/3) (0/3) (0/3) ILLINOIS RIVER AT SENECA - UPSTREAM

(<4/<6) (<5/<6) (<5/<6) 4.0 MILES NE OF SITE GROUND WATER H-3 2 200 166 N/A 166 L-27 INDICATOR 0 (PCI/LITER) (0/2) (0/1) LSCS ONSITE WELL

(<165/<166) (<166) 0 MILES AT STATION OF SITE GAMMA 2 MN-54 15 3 N/A 3 L-27 INDICATOR 0 (0/2) (0/1) LSCS ONSITE WELL

(<2/<3) (<3) 0 MILES AT STATION OF SITE t

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

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 3RD QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2006 NAME OF FACILITY: LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY: MARSEILLES, IL REPORTING PERIOD: 3RD QUARTER, 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS GROUND WATER CO-58 15 3 N/A 3 L-27 INDICATOR (PCI/LITER) (0/2) (0/1) LSCS ONSITE WELL

(<2/<3) (<3) 0 MILES AT STATION OF SITE FE-59 30 6 N/A 7 L-27 INDICATOR (0/2) (0/1) LSCS ONSITE WELL

(<5/<7) (<7) 0 MILES AT STATION OF SITE CO-60 15 3 N/A 3 L-27 INDICATOR

%0 (0/2) LSCS ONSITE WELL

(<2/<3) (<3) 0 MILES AT STATION OF SITE ZN-65 30 6 N/A 6 L-27 INDICATOR (0/2) (0/1) LSCS ONSITE WELL

(<5/<6) (<6) 0 MILES AT STATION OF SITE NB-95 15 3 N/A 3 L-27 INDICATOR (0/2) (0/1) LSCS ONSITE WELL

(<3/<3) (<3) 0 MILES AT STATION OF SITE ZR-95 30 5 N/A 5 L-27 INDICATOR (0/2) (0/1) LSCS ONSITE WELL

(<4/<5) (<5) 0 MILES AT STATION OF SITE 1-131 15 8 N/A 9 L-27 INDICATOR (0/2) (0/1) LSCS ONSITE WELL

(<&/<9) (<9) 0 MILES AT STATION OF SITE CS-134 15 3 N/A 3 L-27 INDICATOR

.(0/2) (0/1) LSCS ONSITE WELL

(<2/<3) (<3) 0 MILES AT STATION OF SITE 40

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

TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 3RD QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2006 NAME OF FACILITY: LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY: MARSEILLES, IL REPORTING PERIOD: 3RD QUARTER, 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS GROUND WATER CS-137 18 3 N/A 3 L-27 INDICATOR 0 (PCI/LITER) (0/2) (0/1) LSCS ONSITE WELL

(<2/<3) (<3) 0 MILES AT STATION OF SITE BA-140 60 18 N/A 19 L-27 INDICATOR 0 (0/2) (0/1) LSCS ONSITE WELL

(<17/<19) (<19) 0 MILES AT STATION OF SITE LA-140 15 6 N/A 6 L-27 INDICATOR 0 0

(0/2) (0/I) LSCS ONSITE WELL

(<5/<6) (<6) 0 MILES AT STATION OF SITE AIR PARTICULATE GR-B 116 10 23 23 24 L-I I INDICATOR 0 (E-3 PCIICU.METER) (103/103) (13/13) (13/13) RANSOM (12/37) (17/34) (17/36) 6.0 MILES S OF SITE GAMMA 9 MN-54 N/A 2.1 1.5 2.9 L-08 INDICATOR 0 (0/8) (0/1) (0/1) MARSEILLES

(< 1.4/< 2.9) (< 1.5) (< 2.9) 6.0 MILES NNW OF SITE CO-58 N/A 5.3 3.7 6.0 L-11 INDICATOR 0 (0/8) (o/1) (0/1) RANSOM

(< 4.3/< 6.0) (<3.7) (<6.0) 6.0 MILES S OF SITE FE-59 N/A 22.2 25.4 30.5 L-08 INDICATOR 0 (0/8) (0/1) (0/1) MARSEILLES

(<12/<30.5) (<25.4) (<30.5) 6.0 MILES NNW OF SITE CO-60 N/A 1.8 1.2 3.3 L-08 INDICATOR 0 (0/8) (0/1) (0/1) MARSEILLES

(< 1.1/< 3.3) (< 1.2) (< 3.3) 6.0 MILES NNW OF SITE t

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

'4,

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 3RD QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2006 NAME OF FACILITY: LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY: MARSEILLES, IL REPORTING PERIOD: 3RD QUARTER, 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS AIR PARTICULATE ZN-65 N/A 5.5 4.7 6.9 L-08 INDICATOR 0 (E-3 PCI/CU.METER) (0/8) (0/1) (0/1) MARSEILLES

(< 3.9/< 6.9) (< 4.7) (< 6.9) 6.0 MILES NNW OF SITE ZRNB-95 N/A 7.3 5.1 11 L-08 INDICATOR 0 (0/8) (0/I) (0/1) MARSEILLES

(<5.7/<11) (< 5.1) (<11) 6.0 MILES NNW OF SITE I CS-134 50 1.8 1.5 2.1 L-08 INDICATOR (0/8) (0/1) (0/1) MARSEILLES

(< 1.6/< 2.1) (<2.1) 6.0 MILES NNW OF SITE

(< 1.5)

CS-137 60 1.9 1.4 2.4 L-03 INDICATOR 0 (0/8) (0/1) (0/1) ONSITE 3

(< 1.4/< 2.4) (<1.4) (<2.4) 1.0 MILES ENE OF SITE BALA140 N/A 1909.8 4020 4020 L-10 CONTROL 0 (0/8) (0/1) (0/1) STREATOR

(<9981<2520) (<4020) (<4020) 13.5 MILES SW OF SITE AIR IODINE GAMMA 116 (E-3 PCI/CU.METER) 1-131 70 55 59 59 L-10 CONTROL 0 (0/103) (0/13) (0/13) STREATOR

(<15/<70) (<27/<68) (<27/<68) 13.5 MILES SW OF SITE MILK 1-131 6 N/A 0.5 0.5 L-42 CONTROL 0 (PC[ILITER) (0/6) (0/6) BIROS FARM

(< 0.3/< 0.8) (< 0.3/< 0.8) 14.2 MILES E OF SITE THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING BOTH THE MDAs AND THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

-I.'

TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 3RD QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2006 NAME OF FACILITY: LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY: MARSEILLES, IL REPORTING PERIOD: 3RD QUARTER, 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS MILK GAMMA 6 (PC[/LITER) MN-54 N/A N/A 7 7 L-42 CONTROL 0 (0/6) (0/6) BIROS FARM

(<61<7) (<6/<7) 14.2 MILES E OF SITE cO-58 N/A N/A 7 7 L.-42 CONTROL 0 (0/6) (0/6) BIROS FARM

(<6/<8) (<6/<8) 14.2 MILES E OF SITE FE-59 N/A N/A 16 16 L-42 CONTROL 0 (0/6) (0/6) BIROS FARM

(<13/<18) (<13/<I) 14.2 MILES E OF SITE CO-60 N/A N/A 7 7 L-42 CONTROL 0 (0/6) (0/6) BIROS FARM

(<5/<7) (<5/<7) 14.2 MILES E OF SITE ZN-65 N/A N/A 16 16 L-42 CONTROL 0 (0/6) (0/6) BIROS FARM

(<12/<19) (<12/<19) 14.2 MILES E OF SITE ZRNB-95 N/A N/A 7 7 L-42 CONTROL 0 (0/6) (0/6) BIROS FARM

(<6/<9) (<6/<9) 14.2 MILES E OF SITE CS-134 15 N/A 6 6 L-42 CONTROL 0 (0/6) (0/6) BIROS FARM

(<4/<8) (<4/<8) 14.2 MILES E OF SITE CS-137 18 N/A 6 6 L-42 CONTROL 0 (0/6) (0/6) BIROS FARM

(<5/<8) (<51<8) 14.2 MILES E OF SITE

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

TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 3RD QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2006 NAME OF FACILITY: LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY: MARSEILLES, IL REPORTING PERIOD: 3RD QUARTER, 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMEN*) (LLD) MEASUREMENTS MILK BA-140 60 N/A 36 36 L-42 CONTROL 0 (PCI/LrTER) (0/6) (0/6) BIROS FARM

(<29/<44) (<29/<44) 14.2 MILES E OF SITE LA-140 15 N/A 11 11 L-42 CONTROL 0 (0/6) (0/6) BIROS FARM

(<S/<14) (<8/<14) 14.2 MILES E OF SITE bi VEGETATION GAMMA 10 w

(PCI/LTER) MN-54 N/A 11 13 14 L-QUAD 1 INDICATOR 0 (0/8) (0/2) (0/2) DIANE PARTRIDGE

(<7/<15) (<12/<14) (<13/<15) 4.5 MILES NE OF SITE CO-58 N/A 12 13 16 L-QUAD 1 INDICATOR (0/8) (0/2) (0/2) DIANE PARTRIDGE

(<10/<18) (<13/<14) (<14/<18) 4.5 MILES NE OF SITE FE-59 N/A 28 37 38 L-QUAD 1 INDICATOR 0 (0/8) (0/2) (0/2) DIANE PARTRIDGE

(<22/<40) (<33/<41) (<36/<40) 4.5 MILES NE OF SITE CO-60 N/A 12 12 16 L-QUAD I INDICATOR 0 (0/8) (0/2) (0/2) DIANE PARTRIDGE

(<a/<18) (<10/<14) (<15/<18) 4.5 MILES NE OF SITE N/A 24 33 33 L-CONTROL CONTROL ZN-65 0 (0/8) (0/2) (0/2) EUGENE CLEMENTS

(<18/<32) (<27/<38) (<27/<38) 10.0 MILES NW OF SITE ZRNB-95 N/A 12 15 16 L-QUAD I INDICATOR 0 (0/8) (0/2) (0/2) DIANE PARTRIDGE

(<8/<18) (<14/<15) (<14/<18) 4.5 MILES NE OF SITE THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING BOTH THE MDAs AND THE POSITIVE VALUES LA 0* FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 3RD QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2006 NAME OF FACILITY: LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY: MARSEILLES, IL REPORTING PERIOD: 3RD QUARTER, 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMD1 (LLD) MEASUREMENTS VEGETATION 1-131 60 53 48 56 L-QUAD 2 INDICATOR 0 (PCIALITER) (0/8) (0/2) (0/2) MIKE AND GINA WELBOURNE

(<42/<58) (<48/<49) (<551<58) 3.8 MILES ESE OF SITE CS-134 60 9 11 12 L-QUAD I INDICATOR 0 (0/8) (0/2) (0/2) DIANE PARTRIDGE

(<7/<13) (<10/<13) (<11/<13) 4.5 MILES NE OF SITE CS-137 80 11 13 14 L-QUAD I INDICATOR 0 (0/8) (0/2) (0/2) DIANE PARTRIDGE

(<8/<14) (<11/<14) (<14/<14) 4.5 MILES NE OF SITE BALA140 N/A 27 24 32 L-QUAD 2 INDICATOR 0 (0/8) (0/2) (0/2) MIKE AND GINA WELBOURNE

(<20/<33) (<22V<26) (<31/<33) 3.8 MILES ESE OF SITE DIRECT RADIATION TLD-QUARTERLY 82 N/A 26 24 41 L-102-2 INDICATOR 0 (MILLI-ROENTGEN/QTR.) (80/80) (2/2) (1/1)

(21/41) (22/25) (41) 0.6 MILES NNE OF SITE

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING BOTH THE MDAs AND THE POSITIVE VALUES 0O FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 4TH QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2006 NAME OF FACILITY: LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY: MARSEILLES, IL REPORTING PERIOD: 4TH QUARTER, 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS SURFACE WATER GR-B 6 4 8.1 6.7 8.1 L-40 INDICATOR 0 (PCI/LITER) (3/3) (3/3) (3/3) ILLINOIS RIVER - DOWNSTREAM (6.3/9.9) (5.7/8.5) (6.3/9.9) 5.2 MILES NNW OF SITE H-3 2 200 177 143 177 L-40 INDICATOR 0 (1/1) (0/I) (1/1) ILLINOIS RIVER - DOWNSTREAM (177) (<143) (177) 5.2 MILES NNW OF SITE GAMMA 6 MN-54 15 1 1 L-21 CONTROL 0 (0/3) (0/3) (0/3) ILLINOIS RIVER AT SENECA - UPSTREAM

(<I/<2) (<I/<2) (<I/<2) 4.0 MILES NE OF SITE CO-58 15 2 2 2 L-21 CONTROL 0 (0/3) (0/3) (0/3) ILLINOIS RIVER AT SENECA - UPSTREAM

(<I/<2) (<I/<2) (<1/<2) 4.0 MILES NE OF SITE FE-59 30 4 4 4 L-21 CONTROL 0 (0/3) (0/3) (0/3) ILLINOIS RIVER AT SENECA - UPSTREAM

(<3/<4) (<4/<5) (<41<5) 4.0 MILES NE OF SITE CO-60 15 2 1 2 L-40 INDICATOR 0 (0/3) (0/3) (0/3) ILLINOIS RIVER - DOWNSTREAM

(<I/<2) (<I/<2) (<I/<2) 5.2 MILES NNW OF SITE ZN-65 30 3 3 3 L-21 CONTROL 0 (0/3) (0/3) (0/3) ILLINOIS RIVER AT SENECA - UPSTREAM

(<2/<3) (<2/<4) (<21<4) 4.0 MILES NE OF SITE NB-95 15 2 2 2 L-21 CONTROL 0 (0/3) (0/3) (0/3) ILLINOIS RIVER AT SENECA - UPSTREAM

(<I/<2) (<1/<2) (<I/<2) 4.0 MILES NE OF SITE

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING BOTH THE MDAs AND THE POSITIVE VALUES

-J FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 4TH QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2006 NAME OF FACILITY: LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY: MARSEILLES, IL REPORTING PERIOD: 4TH QUARTER, 2006 INDICATOR CONTROL LOCATION WITH MGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS SURFACE WATER ZR-95 30 3 3 3 L-21 CONTROL (PCILITER) (0/3) (0/3) (0/3) ILLINOIS RIVER AT SENECA - UPSTREAM

(<2/<3) (<3/<4) (<3/<4) 4.0 MILES NE OF SITE 1-131 15 13 15 15 L-21 CONTROL (0/3) (0/3) (0/3) ILLINOIS RIVER AT SENECA - UPSTREAM

(<12/<14) (<151<15) (<151<15) 4.0 MILES NE OF SITE CS-134 15 1 1 1 L-21 CONTROL (0/3) (0/3) (0/3) ILLINOIS RIVER AT SENECA - UPSTREAM

(<1/<1) (<1/<2) (<1/<2) 4.0 MILES NE OF SITE CS-137 18 1 2 2 L-21 CONTROL (0/3) (0/3) (0/3) ILLINOIS RIVER AT SENECA - UPSTREAM

(<1/<2) (<1/<2) (<1/<2) 4.0 MILES NE OF SITE BA-140 60 18 21 21 L-21 CONTROL (0/3) (0/3) (0/3) ILLINOIS RIVER AT SENECA - UPSTREAM

(<18/<19) (<19/<23) (<19/<23) 4.0 MILES NE OF SITE LA-140 15 6 7 7 L-21 CONTROL (0/3) (0/3) (0/3) ILLINOIS RIVER AT SENECA - UPSTREAM

(<3/<6) (<6/<8) (<6/<8) 4.0 MILES NE OF SITE GROUND WATER H-3 200 176 N/A 181 L-27 INDICATOR (PCI/LITER) (0/2) (0/1) LSCS ONSITE WELL

(<170/<181) (<181) 0 MILES AT STATION OF SITE GAMMA 2 MN-54 15 1 N/A I L-28 INDICATOR 0 (0/2) (0/1) MARSEILLES WELL 06

(<i/<i) (<0) 7.0 MILES NW OF SITE 00

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

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 4TH QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2006 NAME OF FACILITY: LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY: MARSEILLES, IL REPORTING PERIOD: 4TH QUARTER, 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS GROUND WATER CO-59 15 1 N/A 2 L-28 INDICATOR 0 (PCI/LITER) (0/2) (0/1) MARSEILLES WELL

(<1/<2) (<2) 7.0 MILES NW OF SITE FE-59 30 3 N/A 4 L-28 INDICATOR 0 (0/2) (0/1) MARSEILLES WELL

(<3/<4) (<4) 7.0 MILES NW OF SITE

>! 1 CO-60 15 1 N/A L-28 INDICATOR 0 (0/2) (0/1) MARSEILLES WELL

(<I/<I) (<I) 7.0 MILES NW OF SITE ZN-65 30 3 N/A 3 L-28 INDICATOR 0 (0/2) (0/1) MARSEILLES WELL

(<2/<3) (<3) 7.0 MILES NW OF SITE NB-95 15 2 N/A 2 L-28 INDICATOR 0 (0/2) (0/I) MARSEILLES WELL

(<1/<2) (<2) 7.0 MILES NW OF SITE ZR-95 30 3 N/A 3 L-28 INDICATOR 0 (0/2) (0/1) MARSEILLES WELL

(<2/<3) (<3) 7.0 MILES NW OF SITE 1-131 15 8 N/A 9 L-28 INDICATOR 0 (0/2) (0/I) MARSEILLES WELL

(<8/<9) (<9) 7.0 MILES NW OF SITE CS- 134 15 1 N/A L-28 INDICATOR 0 (0/2) (0/I) MARSEILLES WELL

(<I/<I) (<I) 7.0 MILES NW OF SITE

'0

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

FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 4TH QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2006 NAME OF FACILITY: LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY: MARSEILLES, IL REPORTING PERIOD: 4TH QUARTER, 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS GROUND WATER CS-137 18 1 N/A L-28 INDICATOR 0 (PCILrER) (0/2) MARSEILLES WELL

(<I/<I) 7.0 MILES NW OF SITE BA-140 60 14 N/A 15

(<15) L-28 INDICATOR 0 (0/2) MARSEILLES WELL

(<13/<15) (<IS) 7.0 MILES NW OF SITE LA-140 15 4 N/A 5 L-28 INDICATOR 0 00 (0/2) (0/1) MARSEILLES WELL

(<4/<5) (<5) 7.0 MILES NW OF SITE FISH GAMMA 6 (PCI/KG) MN-54 130 63 58 72 L-34 INDICATOR 0 (0/4) (0/2) (0/2) LASALLE COOLING LAKE

(<46/<82) (<42/<75) (<62/<82) 2.0 MILES E OF SITE CO-58 130 76 63 90 L-34 INDICATOR 0 (0/4) (0/2) (0/2) LASALLE COOLING LAKE

(<53/<99) (<50/<77) (<82/<99) 2.0 MILES E OF SITE FE-59 260 196 148 236 L-34 INDICATOR 0 (0/4) (0/2) (0/2) LASALLE COOLING LAKE

(<136/<240) (<94/<201) (<231/<240) 2.0 MILES E OF SITE CO-60 130 64 53 67 L-34 INDICATOR 0 (0/4) (0/2) (0/2) LASALLE COOLING LAKE

(<45/<78) (<39/<67) (<61/<74) 2.0 MILES E OF SITE ZN-65 260 138 114 148 L-34 INDICATOR 0 (0/4) (0/2) (0/2) LASALLE COOLING LAKE

(<111 /<179) (<73/<156) (<116/<179) 2.0 MILES E OF SITE tA

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING BOTH THE MDAs AND THE POSITIVE VALUES 0p FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F) 4*

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 4TH QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2006 NAME OF FACILITY: LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY: MARSEILLES, IL REPORTING PERIOD: 4TH QUARTER, 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENI) (LLD) MEASUREMENTS FISH ZRNB-95 N/A 109 64 124 L-34 INDICATOR 0 (PCI/KG) (0/4) (0/2) (0/2) LASALLE COOLING LAKE

(<721<126) (<47/<82) (<122/<126) 2.0 MILES E OF SITE CS-134 130 61 56 66 L.34 INDICATOR 0 (0/4) (0/2) (0/2) LASALLE COOLING LAKE

(<42/<70) (<38/<73) (<63/<70) 2.0 MILES E OF SITE CS-137 150 67 54 80 L-34 INDICATOR 0 t'J (0/4) (0/2) (0/2) LASALLE COOLING LAKE

(<49/<84) (<36/<73) (<75/<84) 2.0 MILES E OF SITE BALAI40 N/A 329 297 350 L-34 INDICATOR 0 (0/4) (0/2) (0/2) LASALLE COOLING LAKE

(<238/<385) (<230/<364) (<314/<385) 2.0 MILES E OF SITE SEDIMENT GAMMA 2 (PCI/KG DRY) MN-54 N/A 50 N/A 60 L-40 INDICATOR 0 (o/2) (0/1) ILLINOIS RIVER - DOWNSTREAM

(<41/<60) (<60) 5.2 MILES NNW OF SITE CO-58 N/A 50 N/A 51 L-40 INDICATOR 0 (0/2) (0/1) ILLINOIS RIVER - DOWNSTREAM

(<49/<51) (<51) 5.2 MILES NNW OF SITE FE-59 N/A 146 N/A 173 L-40 INDICATOR 0 (0/2) (0/1) ILLINOIS RIVER - DOWNSTREAM

(<118/<173) (<173) 5.2 MILES NNW OF SITE CO-60 N/A 51 N/A 62 L-40 INDICATOR 0 (0/2) (o/I) ILLINOIS RIVER - DOWNSTREAM

(<39/<62) (<62) 5.2 MILES NNW OF SITE LA lt.)

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

TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 4TH QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2006 NAME OF FACILITY: LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY: MARSEILLES, IL REPORTING PERIOD: 4TH QUARTER, 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS SEDIMENT ZN-65 N/A 114 N/A 115 L-40 INDICATOR 0 (PCIVKG DRY) (0/2) (0/1) ILLINOIS RIVER - DOWNSTREAM

(<112/<115) (<115) 5.2 MILES NNW OF SITE ZRNB-95 N/A 67 N/A 75 L-40 INDICATOR 0 (0/2) (0/1) ILLINOIS RIVER - DOWNSTREAM

(<60/<75) (<75) 5.2 MILES NNW OF SITE CS-134 150 45 N/A 49 L40 INDICATOR 0 0

(0/2) (0/1) ILLINOIS RIVER - DOWNSTREAM

(<401<49) (<49) 5.2 MILES NNW OF SITE CS-137 180 109 N/A 172 L-40 INDICATOR 0 (1/2) (1/I) ILLINOIS RIVER - DOWNSTREAM

(<46/172) (172) 5.2 MILES NNW OF SITE BALAI40 N/A 152 N/A 156 L-41 INDICATOR 0 (0/2) (0/1) ILLINOIS RIVER - DOWNSTREAM

(<147/<156) (<156) 4.6 MILES NNW OF SITE AIR PARTICULATE GR-B 117 10 24 24 26 L-04 INDICATOR 0 (E-3 PCI/CU.METER) (104/104) (13/13) (13/13) RTE. 170 (10/38) (15/38) (16/38) 3.2 MILES E OF SITE GAMMA 9 MN-54 N/A 2.3 2.7 3.7 L-I I INDICATOR 0 (0/8) (0/1) (0/1) RANSOM

(< 1.1/<3.7) (<2.7) (<3.7) 6.0 MILES S OF SITE CO-58 N/A 4.0 6.1 6.1 L-10 CONTROL 0 (0/8) (0/1) (0/1) STREATOR

(< 2.6/< 5.0) (<6.1) (<6.1) 13.5 MILES SW OF SITE 0

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

LA

TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 4TH QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2006 NAME OF FACILITY: LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY: MARSEILLES, IL REPORTING PERIOD: 4TH QUARTER, 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMNT (LLD) MEASUREMlENTS AIR PARTICULATE FE-59 N/A 11.8 16.4 16.5 L-1 I INDICATOR 0 (E-3 PCI/CU.METER) (0/8) (0/I) (0/1) RANSOM

(< 7.61<16.5) (<16.4) (<16.5) 6.0 MILES S OF SITE CO-60 N/A 2.0 1.2 3.0 L-04 INDICATOR 0 (0/8) (0/1) (0/1) RTE. 170

(< 0.8/< 3.0) (< 1.2) (<3.0) 3.2 MILES E OF SITE t* ZN-65 N/A 6.0 5.4 9.9 L-I I INDICATOR 0 (0/8) (0/1) (0/1) RANSOM

(< 3.0/< 9.9) (< 5.4) (<9.9) 6.0 MILES S OF SITE ZRNB-95 N/A 4.3 6.2 6.2 L-10 CONTROL 0 (0/8) (0/1) (0/1) STREATOR

(< 2.7/< 6.1) (<6.2) (< 6.2) 13.5 MILES SW OF SITE CS-134 50 2.2 2.8 3.2 L-07 INDICATOR 0 (0/8) (0/1) (0/1) SENECA

(< 1.4/< 3.2) (< 2.8) (< 3.2) 5.2 MILES NNE OF SITE CS-137 60 2.1 2.5 3.0 L-i I INDICATOR 0 (0/8) (0/1) (0/1) RANSOM

(<1.1/< 3.0) (< 2.5) (< 3.0) 6.0 MILES S OF SITE BALAI40 N/A 180.6 262 262 L-10 CONTROL 0 (0/8) (0/1) (0/1) STREATOR

(<99.81<236) (<262) (<262) 13.5 MILES SW OF SITE AIR IODINE GAMMA 117 (E-3 PCI/CU.METER) 1-131 70 35 40 40 L-I0 CONTROL 0 (0/104) (0/13) (0/13) STREATOR

(<12/<65) (<20/<65) (<20/<65) 13.5 MILES SW OF SITE THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING BOTH THE MDAS AND THE POSITIVE VALUES 4Jm A.

FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-i RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 4TH QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2006 NAME OF FACILITY: LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY: MARSEILLES, IL REPORTING PERIOD: 4TH QUARTER, 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS MILK 1-131 4 1 N/A 0.5 0.5 L-42 CONTROL (PCI/LITER) (0/4) (0/4) BIROS FARM

(< 0.3/< 0.7) (< 0.3/< 0.7) 14.2 MILES E OF SITE GAMMA MN-54 N/A N/A 6 6 L-42 CONTROL (0/4) (0/4) BIROS FARM

(<5/<6) (<5/<6) 14.2 MILES E OF SITE I

CO-58 N/A N/A 6 6 L-42 CONTROL 0 (0/4) (0/4) BIROS FARM

(<5/<7) (<5/<7) 14.2 MILES E OF SITE FE-59 N/A N/A 15 15 L-42 CONTROL 0 (0/4) (0/4) BIROS FARM

(<14/<17) (<14/<17) 14.2 MILES E OF SITE CO-60 N/A N/A 6 6 L-42 CONTROL 0 (0/4) (0/4) BIROS FARM

(<5/<7) (<5/<7) 14.2 MILES E OF SITE ZN-65 N/A N/A 13 13 L-42 CONTROL 0 (0/4) (0/4) BIROS FARM

(<10/<16) (<10/<16) 14.2 MILES E OF SITE ZRNB-95 N/A N/A 6 6 L-42 CONTROL 0 (0/4) (0/4) BIROS FARM

(<6/<7) (<6/<7) 14.2 MILES E OF SITE CS-134 15 N/A 5 5 L-42 CONTROL 0 (0/4) (0/4) BIROS FARM

(<5/<6) (<5/<6) 14.2 MILES E OF SITE ILA THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING BOTH THE MDAS AND THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 4TH QUARTER

SUMMARY

FOR THE LASALLE COUNTY STATION, 2006 NAME OF FACILrY: LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACLITY: MARSEILLES, IL REPORTING PERIOD: 4TH QUARTER, 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS MILK CS-137 18 N/A 6 6 L-42 CONTROL 0 (PCI/LITER) (0/4) (0/4) BIROS FARM

(<5/<6) (<5/<6) 14.2 MILES E OF SITE BA-140 60 N/A 43 43 L-42 CONTROL 0 (0/4) (0/4) BIROS FARM

(<40/<49) (<40/<49) 14.2 MILES E OF SITE w LA-140 15 N/A 11 11 L-42 CONTROL 0 (0/4) (0/4) BIROS FARM

(<8/<14) (<8/<14) 14.2 MILES E OF SITE DIRECT RADIATION TLD-QUARTERLY 82 N/A 27 24 30 L-102-2 INDICATOR* 0 (MILLI-ROENTGEN/QTR.) (80/80) (2/2) (1/1)

(23/30) (23/24) (30) 0.6 MILES NNE OF SITE

L-105-1 also read 30 mrem.

LA tA

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING BOTH THE MDAS AND THE POSITIVE VALUES

0. 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, 2006 NAME OF FACILITY: LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY: MARSEILLES, IL REPORTING PERIOD: ANNUAL, 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS SURFACE WATER GR-B 24 4 8.0 7.4 8.0 L-40 INDICATOR (PCI/LITER) (12/12) (12/12) (12/12) ILLINOIS RIVER - DOWNSTREAM (5.1/10.1) (5.6/10.5) (5.1/10.1) 5.2 MILES NNW OF SITE H-3 8 200 180 170 180 L-40 INDICATOR 0 (1/4) (0/4) (1/4) ILLINOIS RIVER - DOWNSTREAM

(<174/<191) (<143/<189) (<174/<191) 5.2 MILES NNW OF SITE uo GAMMA 24 MN-54 15 1 1 1 L-21 CONTROL 0 (0/12) (0/12) (0/12) ILLINOIS RIVER AT SENECA - UPSTREAM

(<0/<2) (<1/<2) (<1/<2) 4.0 MILES NE OF SITE CO-58 15 2 2 2 L-21 CONTROL 0 (0/12) (0/12) (0/12) ILLINOIS RIVER AT SENECA - UPSTREAM

(<1/<3) (<1/<3) (<1/<3) 4.0 MILES NE OF SITE FE-59 30 4 4 4 L-21 CONTROL (0/12) (0/12) (0/12) ILLINOIS RIVER AT SENECA - UPSTREAM

(<2/<7) (<2/<7) (<2V<7) 4.0 MILES NE OF SITE CO-60 15 1 t 1 L-21 CONTROL 0 (0/12) (0/12) (0/12) ILLINOIS RIVER AT SENECA - UPSTREAM

(<0/<2) (<1/<3) (<1/<3) 4.0 MILES NE OF SITE ZN-65 30 3 3 3 L-21 CONTROL 0 (0/12) (0/12) (0/12) ILLINOIS RIVER AT SENECA - UPSTREAM

(<11<5) (<1/<5) (<11<5) 4.0 MILES NE OF SITE NB-95 15 2 2 2 L-21 CONTROL (0/12) (0/12) (0/12) ILLINOIS RIVER AT SENECA - UPSTREAM

(<I/<3) (<1/<3) (<I/<3) 4.0 MILES NE OF SITE

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING BOTH THE MDAs AND THE POSITIVE VALUES 0b 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, 2006 NAME OF FACILITY: LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY: MARSEILLES, IL REPORTING PERIOD: ANNUAL, 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMeNTS SURFACE WATER ZR-95 30 3 3 3 L-21 CONTROL (FrCrITER) (0/12) (0/12) (0/12) ILLINOIS RIVER AT SENECA - UPSTREAM

(<11<5) (<1/<5) (<11<5) 4.0 MILES NE OF SITE 1-131 15 12 12 12 L-21 CONTROL (0/12) (0/12) (0/12) ILLINOIS RIVER AT SENECA - UPSTREAM

(<&/<15) (<7/<15) (<7/<15) 4.0 MILES NE OF SITE CS-134 15 1 1 L-21 CONTROL LA (0/12) (0/12) ILLINOIS RIVER AT SENECA - UPSTREAM

(<0/<2) 1

(<1/<2) 4.0 MILES NE OF SITE (0/12)

CS-137 18 1 L-21 CONTROL (0/12) (0/12) (0/12) ILLINOIS RIVER AT SENECA - UPSTREAM

(<0/<2) (<0/<2) (<o/<2) 4.0 MILES NE OF SITE BA-140 60 23 25 25 L-21 CONTROL (0/12) (0/12) (0/12) ILLINOIS RIVER AT SENECA - UPSTREAM

(<14/<41) (<13/<44) (<13/<44) 4.0 MILES NE OF SITE LA-140 15 8 8 8 L-21 CONTROL (0/12) (0/12) (0/12) ILLINOIS RIVER AT SENECA - UPSTREAM

(<4/<14) (<51<15) (<51<15) 4.0 MILES NE OF SITE GROUND WATER H-3 8 200 170 N/A 171 L-27 INDICATOR (PCI/LITER) (0/8) (0/4) LSCS ONSITE WELL

(<165/<181) (<166/<181) 0 MILES AT STATION OF SITE GAMMA 8 MN-54 15 4 N/A 4 L-27 INDICATOR 0 (0/8) (0/4) LSCS ONSITE WELL

(<1/<S) (<1/<a) 0 MILES AT STATION OF SITE LA

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING BOTH THE MDAs AND 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, 2006 NAME OF FACILITY: LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY: MARSEILLES, IL REPORTING PERIOD: ANNUAL, 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS GROUND WATER CO-58 15 4 N/A 4 L-28 INDICATOR 0 (PCI/LITER) (0/8) (0/4) MARSEILLES WELL

(<I/<8) (<2/<8) 7.0 MILES NW OF SITE FE-59 30 7 N/A s L-27 INDICATOR (0/8) (0/4) LSCS ONSITE WELL

(<3/<18) (<3/<18) 0 MILES AT STATION OF SITE CO-60 15 4 N/A 4 L-27 INDICATOR (0/8) (0/4) LSCS ONSITE WELL

(<t/<iI) (<I/<II) 0 MILES AT STATION OF SITE ZN-65 30 8 N/A 9 L-27 INDICATOR (0/8) (0/4) LSCS ONSITE WELL

(<2/<22) (<2/<22) 0 MILES AT STATION OF SITE NB-95 15 4 N/A 4 L-27 INDICATOR (0/8) (0/4) LSCS ONSITE WELL

(<11<8) (<I/<8) 0 MILES AT STATION OF SITE ZR-95 30 6 N/A 6 L-27 INDICATOR (0/8) (0/4) LSCS ONSITE WELL

(<21<14) (<2/<14) 0 MILES AT STATION OF SITE 1-131 15 9 N/A 9 L-27 INDICATOR (0/8) (0/4) LSCS ONSITE WELL

(<7/<13) (<71<13) 0 MILES AT STATION OF SITE CS-134 15 4 N/A 4 L-28 INDICATOR (0/8) (0/4) MARSEILLES WELL

(<I/<8) (<1/<8) 7.0 MILES NW OF SITE L.A 00

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING BOTH THE MDAS AND THE POSITIVE VALUES 0R 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, 2006 NAME OF FACILITY: LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY: MARSEILLES, IL REPORTING PERIOD: ANNUAL, 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS GROUND WATER CS-137 18 3 N/A 4 L-27 INDICATOR 0 (PC[/LITER) (0/8) (0/4) LSCS ONSITE WELL

(<1/<4) (<1/<S) 0 MILES AT STATION OF SITE BA-140 60 20 N/A 22 L-27 INDICATOR 0 (0/8) (0/4) LSCS ONSITE WELL

(<13/<39) (<13/<39) 0 MILES AT STATION OF SITE LA-140 15 7 N/A 7 L-27 INDICATOR 0

-J (0/8) (0/4) LSCS ONSITE WELL

(<4/<13) (<4/<13) 0 MILES AT STATION OF SITE FISH GAMMA 12 (PCI/KG WET) MN-54 130 67 63 72 L-34 INDICATOR 0 (0/8) (0/4) (0/4) LASALLE COOLING LAKE

(<45/<100) (<42/<75) (<45/<100) 2.0 MILES E OF SITE CO-58 130 78 70 83 L-34 INDICATOR 0 (0/8) (0/4) (0/4) LASALLE COOLING LAKE

(<53/<108) (<50/<79) (<54/<99) 2.0 MILES E OF SITE FE-59 260 183 147 202 L-34 INDICATOR 0 (0/8) (0/4) (0/4) LASALLE COOLING LAKE

(<120/<240) (<94/<2o0) (<120/<240) 2.0 MILES E OF SITE CO-60 130 69 60 70 L-34 INDICATOR (0/8) (0/4) (0/4) LASALLE COOLING LAKE

(<45/<88) (<39/<68) (<58/08) 2.0 MILES E OF SITE ZN-65 260 159 134 165 L-34 INDICATOR 0 (0/8) (0/4) (0/4) LASALLE COOLING LAKE

(<111/<237) (<73/<160) (<116/<237) 2.0 MILES E OF SITE tA

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING BOTH THE MDAs AND 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, 2006 NAME OF FACILITY: LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY: MARSEILLES, IL REPORTING PERIOD: ANNUAL, 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS FISH ZRNB-95 N/A 94 72 102 L-34 INDICATOR 0.

(PCIKG WET) (0/8) (0/4) (0/4) LASALLE COOLING LAKE

(<53/<126) (<47/<82) (<53/<126) 2.0 MILES E OF SITE CS-134 130 67 60 68 L-34 INDICATOR (0/8) (0/4) (0/4) LASALLE COOLING LAKE

(<42/<93) (<38/<73) (<47/<93) 2.0 MILES E OF SITE CS-137 150 71 62 73 L-34 INDICATOR 00 (0/8) (0/4) (0/4) LASALLE COOLING LAKE

(<47/<98) (<36/<80) (<47/<M7) 2.0 MILES E OF SITE BALAI40 N/A 266 236 277 L-34 INDICATOR (0/8) (0/4) (0/4) LASALLE COOLING LAKE

(<133/<385) (<154/<364) (<133/<385) 2.0 MILES E OF SITE SEDIMENT GAMMA 4 (PCI/KG DRY) MN-54 N/A 63 N/A 76 L-40 INDICATOR (0/4) (0/2) ILLINOIS RIVER - DOWNSTREAM

(<41/<92) (<601<92) 5.2 MILES NNW OF SITE CO-58 N/A 64 N/A 70 L-40 INDICATOR (0/4) (0/2) ILLINOIS RIVER - DOWNSTREAM

(<49/<89) (<511<89) 5.2 MILES NNW OF SITE FE-59. N/A 171 N/A 194 L-40 INDICATOR (0/4) (0/2) ILLINOIS RIVER - DOWNSTREAM

(<118/<215) (<173/<215) 5.2 MILES NNW OF SITE CO-60 N/A 64 N/A 71 L-40 INDICATOR (0/4) (0/2) ILLINOIS RIVER - DOWNSTREAM

(<39/<81) (<62/<81) 5.2 MILES NNW OF SITE

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING BOTH THE MDAS AND THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F) 0ý

TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE LASALLE COUNTY STATION, 2006 NAME OF FACILITY: LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY: MARSEILLES, IL REPORTING PERIOD: ANNUAL, 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS SEDIMENT ZN-65 N/A 159 N/A 164 L-40 INDICATOR 0 (PCI/KG DRY) (0/4) (0/2) ILLINOIS RIVER - DOWNSTREAM

(<112/<213) (<115/<213) 5.2 MILES NNW OF SITE ZRNB-95 N/A 77 N/A 86 L-40 INDICATOR 0 (0/4) (0/2) ILLINOIS RIVER - DOWNSTREAM

(<60/<97) (<75/<97) 5.2 MILES NNW OF SITE CS-134 150 65 N/A 73 L-40 INDICATOR 0

'C (0/4) (0/2) ILLINOIS RIVER - DOWNSTREAM

(<40/<98) (<49/<98) 5.2 MILES NNW OF SITE CS-137 180 97 N/A 135 L-40 INDICATOR 0 (1/4) (1/2) ILLINOIS RIVER - DOWNSTREAM

(<46/172) (<97/172) 5.2 MILES NNW OF SITE BALA140 N/A 159 N/A 159 L-41 INDICATOR 0 (0/4) (0/2) ILLINOIS RIVER - DOWNSTREAM

(<147/<169) (<156/<162) 4.6 MILES NNW OF SITE AIR PARTICULATE GR-B 467 10 20 20 21 L-04 INDICATOR 0 (E-3 PCI/CU.METER) (414/415) (52/52) (51/51) RTE. 170

(<5/38) (8/38) (10/38) 3.2 MILES E OF SITE GAMMA 36 MN-54 N/A 3.4 3.2 4.3 L-08 INDICATOR 0 (0/32) (0/4) (0/4) MARSEILLES

(< 1.1/< 6.8) (< 1.5/< 5.7) (< 2.6/< 6.8) 6.0 MILES NNW OF SITE CO-58 N/A 7.8 7.9 9.9 L-08 INDICATOR 0 (0/32) (0/4) (0/4) MARSEILLES

(< 2.61<18.5) (<3.7/<12.1) (<4.3/<18.5) 6.0 MILES NNW OF SITE 0==t

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING BOTH THE MDAS AND THE POSITIVE VALUES 0* 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, 2006 NAME OF FACILITY: LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY: MARSEILLES, IL REPORTING PERIOD: ANNUAL, 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS AIR PARTICULATE FE-59 N/A 28.4 33.5 33.8 L-05 INDICATOR 0 (E-3 PCI/CU.METER) (0/32) (0/4) (0/4) ONSITE 5

(< 7.6/<72.7) (<16.41<61.9) (<10.9/<72.7) 0.3 MILES ESE OF SITE CO-60 N/A 2.9 2.8 3.6 L-08 INDICATOR 0 (0/32) (0/4) (0/4) MARSEILLES

(< 0.8/< 6.6) (< 1.2/< 4.8) (< 1.6/< 6.6) 6.0 MILES NNW OF SITE ZN-65 N/A 8.2 8.5 10.9 L-04 INDICATOR 0 (0/32) (0/4) (0/4) RTE. 170

(< 3.0/<15.1) (<4.7/<12.1) (<5.01<15.1) 3.2 MILES E OF SITE ZRNB-95 N/A 8.3 8.1 10.5 L-08 INDICATOR 0 (0/32) (0/4) (0/4) MARSEILLES

(<2.7/<16.1) (< 5.1/<12.6) (< 3.7/<14.1) 6.0 MILES NNW OF SITE CS-134 50 3.2 3.0 3.9 L-08 INDICATOR 0 (0/32) (0/4) (0/4) MARSEILLES

(< 1.4/< 6.5) (< 1.51< 4.2) (< 2.1/< 6.5) 6.0 MILES NNW OF SITE CS-137 60 2.8 2.7 3.3 L-03 INDICATOR 0 (0/32) (0/4) (0/4) ONSITE 3

(< IýI/< 4.9) (< 1.4/< 3.6) (< 2.4/< 4.2) 1.0 MILES ENE OF SITE BALAI40 N/A 1614.6 1598.8 2001.5 L-08 INDICATOR 0 (0/32) (0/4) (0/4) MARSEILLES

(<99.8/<3740) (<262/<4020) (<226/<3050) 6.0 MILES NNW OF SITE AIR IODINE GAMMA 404 (E-3 PC[/CU.METER) 1-131 70 46 5o 5o L-10 CONTROL 0 (0/359) (0/45) (0/45) STREATOR

(<12/<70) (<20/<70) (<20/<70) 13.5 MILES SW OF SITE 0%

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING BOTH THE MDAs AND THE POSITIVE VALUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F) 0:,

TABLE A-I RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE LASALLE COUNTY STATION, 2006 NAME OF FACILITY: LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY: MARSEILLES, IL REPORTING PERIOD: ANNUAL, 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS MILK 1-131 19 1 N/A 0.7 0.7 L-42 CONTROL 0.

(PCI/LITER) (0/19) (0/19) BIROS FARM

(< 0.3/< 2.9) (< 0.3/< 2.9) 14.2 MILES E OF SITE GAMMA 19 MN-54 N/A N/A 7 7 L-42 CONTROL 0 (0/19) (0/19) BIROS FARM

(<51<10) (<51<10) 14.2 MILES E OF SITE CO-58 N/A N/A 7 7 L-42 CONTROL 0 (0/19) (0/19) BIROS FARM

(<5/<9) (<5/<9) 14.2 MILES E OF SITE FE-59 N/A N/A 17 17 L-42 CONTROL 0 (0/19) (0/19) BIROS FARM

(<12/<23) (<12/<23) 14.2 MILES E OF SITE CO-60 N/A N/A 7 7 L-42 CONTROL 0 (0/19) (0/19) BIROS FARM

(<5/<12) (<5/<12) 14.2 MILES E OF SITE ZN-65 N/A N/A 17 17 L-42 CONTROL 0 (0/19) (0/19) BIROS FARM

(<10/<25) (<10/<25) 14.2 MILES E OF SITE ZRNB-95 N/A N/A 8 8 L-42 CONTROL 0 (0/19) (0/19) BIROS FARM

(<5/<11) (<51<I) 14.2 MILES E OF SITE CS-134 15 N/A 7 7 L-42 CONTROL 0 (0/19) (0/19) BIROS FARM

(<4/<13) (<4/< 13) 14.2 MILES E OF SITE thJ

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING BOTH THE MDAs AND THE POSITIVE VALUES 40 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, 2006 NAME OF FACILITY: LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY: MARSEILLES, IL REPORTING PERIOD: ANNUAL, 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (L.D) MEASUREMENTS MILK CS-137 18 N/A 7 7 L-42 CONTROL 0 (PCIrLITER) (0/19) (0/19) BIROS FARM

(<5/<Il) (<5/<11) 14.2 MILES E OF SITE BA-140 60 N/A 39 39 L-42 CONTROL 0 (0/19) (0/19) BIROS FARM

(<~27/<51) 14.2 MILES E OF SITE

(<27/<51)

LA-140 15 N/A 11 11 L-42 CONTROL 0 (0/19) (0/19) BIROS FARM

(<8/<15) (<&/<15) 14.2 MILES E OF SITE VEGETATION GAMMA 10 (PCl/LrrER) MN-54 N/A 11 13 14 L-QUAD I INDICATOR 0 (0/8) (0/2) (0/2) DIANE PARTRIDGE

(<7/<15) (<12/<14) (<13/<15) 4.5 MILES NE OF SITE CO-58 N/A 12 13 16 L-QUAD 1 INDICATOR 0 (0/8) (0/2) (0/2) DIANE PARTRIDGE

(<10/<18) (<13/<14) (<14/<18) 4.5 MILES NE OF SITE FE-59 N/A 28 37 38 L-QUAD IINDICATOR 0 (0/8) (0/2) (0/2) DIANE PARTRIDGE

(<22/<40) (<33/<41) (<36/<40) 4.5 MILES NE OF SITE CO-60 N/A 12 12 16 L-QUAD I INDICATOR 0 (0/8) (0/2) (0/2) DIANE PARTRIDGE

(<8/<18) (<10/<14) (<15/<18) 4.5 MILES NE OF SITE ZN-65 N/A 24 33 33 L-CONTROL CONTROL 0 (0/8) (0/2) (0/2) EUGENE CLEMENTS

(<181<32) (<27/<38) (<27/<38) 10.0 MILES NW OF SITE 0

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING BOTH THE MDAs AND 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, 2006 NAME OF FACILITY: LASALLE DOCKET NUMBER: 50-373 & 50-374 LOCATION OF FACILITY: MARSEILLES, IL REPORTING PERIOD: ANNUAL, 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATIONS # NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F) (F) (F) NAME NONROUTINE (UNIT OF PERFORMED PERFORMED OF DETECTION RANGE RANGE RANGE DISTANCE AND DIRECTION REPORTED MEASUREMENT) (LLD) MEASUREMENTS VEGETATION ZRNB-95 N/A 12 15 16 L-QUAD 1 INDICATOR 0 (PCI/LrrER) (0/8) (0/2) (0/2) DIANE PARTRIDGE

(<8/<18) (<14/<15) (<14/<18) 4.5 MILES NE OF SITE 1-131 60 53 48 56 L-QUAD 2 INDICATOR 0 (0/8) (0/2) (0/2) MIKE AND GINA WELBOURNE

(<42/<58) (<48/<49) (<55/<58) 3.8 MILES ESE OF SITE t

CS-134 60 9 II 12 L-QUAD I INDICATOR 0 (0/8) (0/2) (0/2) DIANE PARTRIDGE

(<7/<13) (<10/<13) (<11/<13) 4.5 MILES NE OF SITE CS-137 80 11 13 14 L-QUAD 1 INDICATOR 0 (0/8) (0/2) (0/2) DIANE PARTRIDGE

(<8/<14) (<11/<14) (<14/<14) 4.5 MILES NE OF SITE BALA140 N/A 27 24 32 L-QUAD 2 INDICATOR 0 (0/8) (0/2) (0/2) MIKE AND GINA WELBOURNE

(<20/<33) (<22/<26) (<31/<33) 3.8 MILES ESE OF SITE DIRECT RADIATION TLD-QUARTERLY 327 N/A 26 23 32 L- 102-2 INDICATOR 0 (MELLI-ROENTGEN/QTR.) (319/319) (8/8) (4/4)

(19/41) (19/28) (24/41) 0.6 MILES NNE OF SITE 0%

THE MEAN AND 2 STANDARD DEVIATION VALUES ARE CALCULATED USING BOTH THE MDAs AND THE POSmVE VALUES

0. FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

APPENDIX B LOCATION DESIGNATION, DISTANCE & DIRECTION, AND SAMPLE COLLECTION & ANALYTICAL METHODS 66 of 234

TABLE B-1: Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, LaSalle County Station, 2006 Location Location Description Distance & Direction From Site A qiirfafAWatfbr L-21 Illinois River at Seneca, Upstream (control) 4.0 miles NE L-40 Illinois River, Downstream (indicator) 5.2 miles NNW R Grond/Weil m Walar L-27 LSCS Onsite Well (indicator) 0 miles at station L-28 Marseilles Well (indicator) 7.0 miles NW r Milk - hl-waekly I monthly L-42 Biros Farm (control) 14.2 miles E n Air ParfrtidaIpq / Air InEdina L-01 Nearsite I (indicator) 1.5 miles NNW L-03 Onsite 3 (indicator) 1.0 miles ENE L-04 Rte. 170 (indicator) 3.2 miles E L-05 Onsite 5 (indicator) 0.3 miles ESE L-06 Nearsite 6 (indicator) 0.4 miles WSW L-07 Seneca (indicator) 5.2 miles NNE L-08 Marseilles (indicator) 6.0 miles NNW L-10 Streator (control) 13.5 miles SW

_-11 Ransom (indicator) 6.0 miles S F, Fsh L-34 LaSalle Cooling Lake (indicator) 2.0 miles E L-35 Marseilles Pool of Illinois River, Downstream (indicator) 6.5 miles NW L-36 Illinois River, Upstream of Discharge (control) 4.3 miles NNE F Rqdirnpnt L-40 Illinois River, Downstream (indicator) 5.2 miles NNW L-41 Illinois River, Downstream (indicator) 4.6 miles NNW

r. Food Prndtirfiq Quadrant I Diane Partridge 4.5 miles NE Quadrant 2 Mike and Gina Welboume 3.8 miles ESE Quadrant 3 Michael Olson 1.5 miles WSW Quadrant 4 Robert Eisers 4.5 miles NW Control Eugene Clements 10.0 miles NW II Hi ,nJrntin~ LEIiMPTof -. LI Ui InneLRinn L-101-1 and -2 0.5 miles N L-102-1 and -2 0.6 miles NNE L-103-1 and -2 0.7 miles NE L-104-1 end -2 0.8 miles ENE L-105-1 and -2 0.7 miles E L-106-1 and -2 1.4 miles ESE L-107-1 and -2 0.8 miles SE L-108-1 and -2 0.5 miles SSE L-109-1 and -2 0.6 miles S L-110-1 and -2 0.6 miles SSW L-11Ib-1 and -2 0.8 miles SW B-1 67 of 234

TABLE B-i: Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, LaSalle County Station, 2006 Location Location Description Distance & Direction From Site L-1 12-1 and -2 0.9 miles WSW L-113a-1 and-2 0.8 miles W L-1 14-1 and -2 0.9 miles WNW L-115-1 and-2 0.7 miles NW L-116-1 and-2 0.6 miles NNW Outpr Ring L-201-3 and -4 4.0 miles N L-202-3 and -4 3.6 miles NNE L-203-1 and -2 4.0 miles NE L-204-1 and -2 3.2 miles ENE L-205-1 and -2 3.2 miles ESE L-205-3 and -4 5.1 miles E L-206-1 and -2 4.3 miles SE L-207-1 and -2 4.5 miles SSE L-208-1 and -2 4.5 miles S L-209-1 and -2 4.0 miles SSW L-210-1 and -2 3.3 miles SW L-211-1 and -2 4.5 miles WSW L-212-1 and -2 4.0 miles WSW L-213-3 and -4 4.9 miles W L-214-3 and -4 5.1 miles WNW L-215-3 and -4 5.0 miles NW L-216-3 and -4 5.0 miles NNW L-01-1 and -2 Nearslte 1 (indicator) 1.5 miles NNW L-03-1 and -2 Onsite 3 (Indicator) 1.0 miles ENE L-04-1 and -2 Rte. 170 (indicator) 3.2 miles E L-05-1 and -2 Onsite 5 (Indicator) 0.3 miles ESE L-06-1 and -2 Nearsite 6 (indicator) 0.4 miles WSW L-07-1 and -2 Seneca (Indicator) 5.2 miles NNE L-08-1 and -2 Marseilles (indicator) 6.0 miles NNW L-1 1-1 and -2 Ransom 6.0 miles S Confrial and~pra Intpraqt L-10-1 and -2 Slreator 13.5 miles SW B-2 68 of 234

TABLE B-2: Radiological Environmental Monitoring Program - Summary of Sample Collection and Analytical Methods, LaSalle County Station, 2006 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 oamm* soectroscopy Surface Water Gross Beta Monthly composite TBE, TBE-2008 Gross Alpha and/or gross beta activity in from weekly grab various matrices samples.

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

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

Env. Inc., T-02 Determination of tritium Inwater (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 aamma spectroscoov 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 inwater (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* amma spectroscopy Sediment Gamma Spectroscopy Semi-annual grab TBE, TBE-2007 Gamma emitting radioisotope analysis samples Env. Inc., GS-01 Determination of gamma emitters by Gamma soect lc, 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 Darticulate 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 gamma s*ectroscopy Air Iodine Gamma Spectroscopy BE-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 amma spectroscopy (batch method)

Milk 1-131 Bi-weekly grab sample TBE, TBE-2012 Radioiodine Invarious matrices when cows are on pasture. Monthly all Env. Inc.. 1-131-01 Determination of 1-131 In milk by anion other times exchanqe Milk Gamma Spectroscopy Bi-weekly grab sample TBE, TBE-2007 Gamma emitting radioisotope analysis when cows are on pasture. Monthly all Env. Inc., GS-01 Determination of gamma emitters by other times Gamma SectroscopV Food Products Gamma Spectroscopy Annual grab samples. TBE, TBE-2007 Gamma emitting radioisotope analysis Env. Inc., GS-01 Determination of gamma emitters by gamma s-ectroscopy TLD Thermoluminescence Quarterly TLDs Global Dosimetry Dosimetry comprised of two Global Dosimetry CaF2 elements.

B-3 69 of 234

t ~0 3. 3U U ts p"U63U U tleaum X Un tbaar Figure B-1 Inner Ring TLD Locations of the LaSalle County Station, 2006 B-4 70 of 234

2%14 216-30 3M64 4 2154.

a24.34 a 04-3 0*205*4 205 awmd Fjdgf a11 I Volan a I1I8 Sam IMUmIn ftwmm blafI ccwj Lhington Comv TL tLDxuasai use $U%4bi

,=~=.u'5 UNo Figure B-2 Outer Ring TLD Locations of the LaSalle County Station, 2006 B-5 71 of 234

I. I

'S I L~7 4 I

Grnd fiado 11 *.&A"om OW tanto to # nM~dy Le OWl C*unty

- -. .- . . .r.

a Ak SampCik LOMUen UMOXIOU Courew

U 5 I U1 t 6I~l Figure B-3 Fixed Air Sampling Locations of the LaSalle County Station, 2006 B-6 72 of 234

Fish N Milk

Sediment

WAter Figure B-4 Ingestion and Waterbome Exposure Pathway Sample Locations of the LaSalle County Station, 2006 B-7 73 of 234

APPENDIX C DATA TABLES AND FIGURES PRIMARY LABORATORY 74 of 234

TABLE C-1.1 CONCENTRATIONS OF GROSS BETA IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2006 RESULTS IN UNITS OF PCIILITER

2 SIGMA COLLECTION PERIOD L-21 L-40 JAN 7.7 +/- 2.3 10 +/- 2.5 FEB 8.7

2.2 7.3 +/- 2.1 MAR 6.8 t 2.2 7.6 +/- 2.3 APR 11

2.6 5.1 +/- 2.3 MAY 5.6 +/- 2.3 6.3 +/- 2.4 JUN 7.2 +/- 2.1 9.2 +/- 2.3 JUL 8.0 +/- 2.4 9.4 +/- 2.5 AUG 8.3 +/- 2.2 8.2 +/- 2.2 SEP 6.3 +/- 2.0 8.8

2.2 OCT 5.7 +/- 1.9 6.3 +/- 1.9 NOV 8.5 +/- 2.3 9.9 +/- 2.4 DEC 5.8 t 2.2 8.2 +/- 2.4 MEAN 7.4 +/- 2.9 8.0 +/- 3.1 TABLE C-4.2 CONCENTRATIONS OF TRITIUM IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2006 RESULTS IN UNITS OF PCIILITER +/- 2 SIGMA COLLECTION PERIOD L-21 L-40 JAN-MAR

189

191 APR-JUN

174 <174 JUL-SEP

175 '178 OCT-DEC

143 177 +/- 97 MEAN 170 1 39 180 +/- 15 C-1 75 of 234

TABLE C4.3 CONCENTRATIONS OF GAMMA EMITTERS IN SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2006 RESULTS IN UNITS OF PCI/LITER *2 SIGMA STC COLLECTION MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 1-131 CS-134 CS-137 BA-140 LA-140 PERIOD L-21 JAN < 1 <1 <3 <1 <2 '1 '2

13 <1 <1 ' 20 '5

<1 '1 <3 <2 <3 '2 '3

12 <1 '1

17 <6 FEB MAR < 2 <3 <6 <2 <5 '3 '5 '9 '2 <2 '44 < 15

-c3 <5 < 11 <2 '2 ' 41 '15 APR <2 <7 '3 <5 '3

< 2 <1

43 <15 MAY I1 <2 <4 <1 '3 <2 '3

10 <1

<1

20 <6 JUN I1 <2 <4 <1 <3 '2 '3

14 <1

<1

19 <6 JUL <1 <1 <3 <1 '2 '3 ' 14 <1 I1 <1 <2 <1 <1 <1

15 <1 <0

17 <6 AUG

<1 <1 <7 '1 21

13 '5 SEP I1 <3 '2 <2

<1 <1 <1 <1 <6 OCT <1 <4 <2 '3

15 ' 19

'2

<2 '1 <1 NOV <1 <2 <4 '3 '3

15

21 <8

'2

<2 '2 <2 DEC < 2 <2 <5 '4 '4 <15 ' 23 <8 t% 3+/-2 12+/-5 1 +/-1 1 +/-1 25 +/- 22 8+/-8 MEAN 11 2+/-1 4+/-3 1+/-1 3+2 2:+/-:1 L-40 JAN <1 <1 '3 <1 '2 <1 '2 <13 <1 <1

17 '6

<1 <1 <1 <1 <11 <1 <1

16 '5 FEB '3 '3 <2 MAR <2 '2 <6 <2 <4 '3 '4 <8 <2 <2 <40 ' 13 APR '2 '3 '7 '2 '5 '3 <5 < 12 <2 '2

41 ' 14 MAY <1 <2 '4 <1 '3 <2 <3 <9 <1 <1

40

14

'1 <1 -c7 JUN <2 '4 '3 <2 '3

15 <1

21

<1 <1 <1 <2 <1 <2

12 <1 <17 <6 JUL '3

<1 <0 <1 <1 <1 ' 14 <0 '0 ' 14 '4 AUG '0 <2 SEP '2 <2 <4 <2 <3 <2 <3 <11 <1 <2

<0 <18 <6

<1 <3 <1 <2 21 <3 ' 14 <1 <1

< 2

<1 < 19 <6 OCT 21

<1 <1 <2 <1 <2

12 <1

18 '5 NOV <3 '2

'2 <2 <1 <2 ' 18 '6 DEC <2 <4 <2 <3 <3

12 MEAN 1 +/-1 2+/-1 4+/-3 1 +/-1 3+/-2 2+/-1 3+/-2 12+/-4 1+1 1+/-1 23+/-21 8+/-7

-t

TABLE C-II.1 CONCENTRATIONS OF TRITIUM IN GROUND/WELL WATER SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2006 RESULTS IN UNITS OF PCI/LITER 12 SIGMA COLLECTION PERIOD L-27 L-28 JAN-MAR

166

168 APR-JUN

171

176 JUL-SEP

166

165 OCT-DEC

181

170 MEAN 171 1 14 170 +/- 9 C-3 77 of 234

TABLE C-11.2 CONCENTRATIONS OF GAMMA EMITTERS IN GROUND/WELL WATER SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2006 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-27 01112/06 <8 '18 <11 <22 < 14 <8 <8

39 04113/06 '2 <3 <5 '3 <6 '4 '3 '3 ' 16 '5 07/13/06 <3 '3 <7 '3 <6 '5 '3 '3

19 <6 10/19/06 <1 <1 '3 <1 <2 <2 <1 <1

13 <4 MEAN 4+/-6 4+/-5 8+/-13 4+/-8 9:+/-:18 4+/-6 6+/-10 4+/-6 4+/-6 22 +/- 23 7+/-8 L-28 01/12/06 <8 <8 '12 '7 < 13 <11 <8 <6

27 ' 12 04/13/06 '3 <3 '6 '3 <6 <5 <3 '3

18 '6 07/13/06 '2 <2 '5 <2 '5 <4 <2 <2 '17 '5 10/19/06 <1 <2 '4 <1 <3 <3 <1 <1

15 <5 MEAN 4+/-6 4+/-5 7:+/-18 3+5 7:+/-:9 4+/-5 6+/-7 4+/-6 3+/-4 19 +/- 11 7:+/- 7

-j 00 01

TABLE C-111.1 CONCENTRATIONS OF GAMMA EMITTERS IN FISH SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY POWER STATION, 2006 RESULTS IN UNITS OF PCI/KG WET +/-2 SIGMA COLLECTION MN-54 CO-58 FE-59 CO-60 ZN-65 ZRNB-95 CS-134 CS-137 BALA-140 STC PERIOD L-34 Bluegill 05/04/06

100 < 98 < 218 <88

237 e 105 '93 <87

275 Channel Catfish 05/04106

45 <54 < 120 <58

128 < 53 '47 ' 47

133 Bluegill 10/02/06 <62

82

240

61 < 116 < 126 '63 <75

385 Channel Catfish 10/02/06 c 82 <99

231 <74 <179 < 122 <70 <84

314 MEAN 72 +/- 48 83 +/- 42 202 +/- 111 70 127 165 +/- 110 102 +/-67 68 +/- 39 73 +/- 37 277 +/- 212 L-35 Channel Catfish 05/04/06 <50 < 61

140 '59

144 ' 58 - 63 ' 65

152 Freshwater drum 05/04/06 '84

108

203 <86

209 ' 103

93

98

254 LA Channel Catfish 10/02106

46 ' 53

136 ' 45 < 111

72

42 ' 49

238 Smallmouth Buffalo 10/02/06

63

72 '176

78 < 145 ' 115 <70

59

379 MEAN 61 +/- 34 73 +/- 49 164 +/- 64 67 *37 152 +/-82 87 +/-53 67 +/-42 68 +/- 43 256 +/- 187 L-36 Channel Catfish 05/04/06

65 ' 73

144

67 < 149 ' 78 <60 '59 <154 Smallmouth Buffalo 05/04/06

69 ' 79

150 <68

160

81

69 '80

197 Channel Catfish 10/02/06

42

50 '94 ' 39 ' 73 ' 47

38 <36

230 Smallmouth Buffalo 10/02/06

75 <77

201 <67

156

82

73

73

364 MEAN 63 +/- 29 70 +/- 27 147 +/- 87 60 +/-28 134 +/-83 72 +/-33 60 +/-32 62 +/- 39 236 +/- 181

-J

TABLE C-IV.1 CONCENTRATIONS OF GAMMA EMITTERS IN SEDIMENT SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2006 RESULTS IN UNITS OF PCI/KG DRY 1 2 SIGMA STC COLLECTION MN-54 CO-58 FE-59 CO-60 ZN-65 ZRNB-95 CS-134 CS-137 BALA-140 PERIOD L-40 05104/06 < 92 < 89 < 215 < 81 <213 < 97 < 98 < 97 < 169 10/26/06 < 60 <51 < 173 < 62 < 115 < 75 < 49 172 +/- 51 < 147 MEAN 76 45 70 +/- 54 194 +/- 59 71 +/- 27 164 +/- 139 86 +/- 32 73 +/-170 135 +/- 106 158 +/- 31 L-41 05/04/06 < 60 < 67 < 176 < 73 < 194 < 77 < 75 < 74 < 162 10/26/06 < 41 < 49 < 118 < 39 < 112 < 60 < 40 < 46 < 156 MEAN 50 28 58 +/- 25 147 +/- 82 56 +/- 48 153 +/- 116 68 +/- 23 58 +/- 48 60 +/- 39 159 +/- 8.5 0

0*

00

TABLE C-V.1 CONCENTRATIONS OF GROSS BETA IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2006 RESULTS IN UNITS OF E-3 PCI/CU METER +/- SIGMA GROUPI I GROUPII I GROUP III L-11 I GRUP IV L-10 WEEK L-03 L-05 L-01 L-06 L-04 L-07 L-08 1 18 :l 10 +/-:14 20 15 1 :t04 1 t- 4 18 4 2U +/- 4 11+/-4 1++/-4 2 25+/-5 25+/-5 22+/-t 4 20+/-4 27+/-5 26 5 19 +/- 4 23+/-5 21 +/-4 20+/-5 24+/-5 20 +/-4 23 +/- 5 20+/-4 20+/-4 3 23 +5 21 +/- 5 23 +/-5 4 15+/-4 16+/-t 4 14+/-4 17+/-4 16+/-4 17 4 16 +/- 4 18+/-4 17+/-4 5 22+/-4 18+/-t 4 23+/-4 19+/-4 21 +/-4 19 +/-4 20 +/-4 19+/-4 22+/-4 6 19+/-4 18+/-14 18+/-4 18+/-t 4 19+/-4 19 +/-4 19 +/- 4 21 +/-5 19+/-4 7 17+/-4 18+/-4 17+/-4 14+/-14 18 +/-4 19 +/-4 18 +/- 4 19+/-4 17+/-4 29t5 26 t5 29+/-t5 28+/-5 28+/-5 8 24+/-5 28+/-5 28+/-5 27+/-5 9 22+/-4 27+/-5 24+/-4 22+/-4 26+/-5 23+4 25 +/- 4 23+/-4 24+/-4 16+/-4 16+/-4 16+/-4 13+/-4 16+/-4 14 +/- 4 16 +/-4 16 +/-4 15 4 10 11 15+/-4 21 +/-4 24+/-t 5 15+/-4 23 +/-5 19 +/- 4 16 +/- 4 17 +/-4 20 4 12 12 +/-4 12+/-t:4 12 +/-4 15+/-4 14+/-4 12 +/- 4 12 +/- 4 13 +/-4 16 +/-4 13 11+/-4 12+/-t 4 12+/-t4 12+/-4 13+/-4 10 +/- 4 9.8 +/- 4 12 4 11 +/-4 14 10+/-4 11+/-t 4 13+/-4 17+/-4 15+/-4 13 t 4 14 +/- 4 16+/-4 11 +/-4 15 20+/-4 23+/-t 5 25+/-5 20+/-5 24+/-5 21 +/- 5 21 +/-4 24+/-5 24+/-5 16 17+/-4 15+/-t4 15+/-4 12+/-4 15+/-4 16 +/- 4 12 +/- 4 16 +/-4 14 4 17 13+/-1 4 16+/-4 17+/-4 15+/-4 15+/-4 11 +/-4 14 +/- 4 15 +/-4 15 +/-4 18 13+/-t 4 16+/-4 15+/-4 20+/-5 14+/-4 14 4 16 +/- 4 13+/-4 13+/-4 19 12+/-4 15+/-4 15+/-4 16+/-4 14+/-4 16 +/-4 14 +/- 4 16+/-4 15+/-4 20 6+/-3 8+/-4 <5 7*4 10+/-4 6+/-4 6+/-3 8+/-4 914 10+/-4 9+/-4 16+/-4 13+/-4 12+/-4 14 +/-4 12 +/-4 14 +/-4 13 +/-4 21 22 24+/-4 24+/-4 24+/-4 23 +/- 4 20 +/- 4 22+/-4 19 +/-4 23 +/-4 25 +/-4 23 19+/-4 22+/-4 19+/-4 20+/-4 21 +/-4 15 +/-4 19 +/- 4 20+/-4 17+/-4 24 14+/-4 12+/-3 14+/-4 13+/-4 14+/-4 14 +/- 4 12 +/- 4 13 4 8+/- 4 24+/-5 23+/-5 21+/-4 18+/-4 23+/-5 22 +/- 4 19 +/-4 22+/-4 18+/-4 25 26 14+/-4 14+/-4 13+/-4 12+/-4 12+/-4 11 +/- 4 14 +/- 4 19+/-4 16+/-4 27 24+/-5 23*t 5 23+/-5 25 +/-5 17+/-4 24 +/- 5 24 t 5 25+/-5 30+/-5 28 19+/-5 16+/-t 4 16+/-4 13 4 (1) 18 +/- 4 14 1+/-4 17+/-4 18+/-4 29 29+/-5 31 +/-5 31 +/-5 30+/-5 25+/-4 34+/-5 28

5 3415 34+/-5 19+/-t 4 20+/-4 19+/-4 19+/-4 21 +/-4 21 +/-4 19 +/- 4 20 +/-4 18 +/-4 30 31 28+/-*5 28+/-5 24+/-5 26+/-5 26+/-5 27 +/- 5 25 +/- 5 25+/-5 29t5 32 23+/-5 19+/-5 26+/-5 20 5 25 +/- 5 28 +/- 5 29 +/- 5 23+/-5 24+/-5 33 23+/-5 22+/-4 23+/-5 19+/-4 23 +/-5 21 +/- 4 20 +/- 4 25 +/-5 23 +/-5 34 31+/-5 32+/-5 36+/-5 29+/-5 37*5 30t5 32 +/- 5 36 15 33 +5 35 24+/-5 19+/-4 24+/-*5 23+/-5 24+/-5 24 +/- 5 23 +/-5 2315 19+/-4 36 19+/-4 19+/-4 12+/-4 19+/-4 20+/-4 19 +/- 4 20 4 21 +/-4 19 +/-4 37 20 +/-4 19 +/-4 20 +/-4 24+/-5 2315 20 +/- 4 2315 20+/-4 18+/-4 38 15+/-4 16+/-4 19+/-4 17+/-4 20+/-5 21 +/- 5 15 +/-4 19 +/-5 18 +/-4 39 17+/-4 16+/-t 4 23+/-5 19+/-4 17+/-4 17 +/- 4 20+/-4 24 +/-5 17 +/-4 40 25+/-5 23+/-4 24+/-5 22+/-4 28+/-5 26 +/- 4 21 +/- 4 25 +/-4 25 +/-4 41 16+/-4 10+/-4 20+/-4 16+/-4 16+/-4 16 +/- 4 13 +/- 4 12 +/-4 15 +/-4 42 18+/-5 14+/-4 16+/-4 17+/-4 18+/-4 19 +/- 5 20 +/- 5 19+/-5 16+/-4 43 24+/-5 19+/-4 18+/-4 18+/-4 22+/-5 23+5 21 +/-4 16+/-4 19+/-4 44 19+/-4 17+/-4 17+/-4 18 4 24 +/- 5 23+4 20 +/-4 19 +/-4 19 +/-4 45 32+/-5 31+/-5 34*5 28 5 31 +/- 5 37 +/- 5 37 +/- 5 37 k5 27 +/-5 46 15+/-4 18+/-4 16+/-4 19+/-4 21 +/-4 21 t 4 20 +/- 4 18 +/-4 20 +/-4 47 33+/-6 27+/-5 29+/-6 32+/-6 35+/-6 33 +/- 6 36 +/- 6 28+/-1 6 38 +/- 6 48 20+/-4 21 +/-4 20+/-4 21 4 20 +/-4 22 +/- 4 21 +/-4 19 4 22 +/-4 49 33t5 30+/-5 3315 33+/-5 38+/-5 30 +/- 5 2915 30+/-5 29+/-5 50 35+/-6 26+/-5 29+/-5 31+/-5 32+/-6 34t5 32 +/- 5 32 5 32 5 51 27+/-5 25+/-5 25+/-5 25+/-5 24+/-5 21 +/- 4 20+/-4 26+/-5 21 4 52 30+/-5 27+/-5 33t5 26+/-5 33*5 32 +/- 5 27 +/-1S 2415 2715 MEAN 20 13 20 +/- 12 21 +/- 13 20 11 21 +/- 13 21 +/- 13 20 +/- 13 21 +/- 12 20 +/- 13 (1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION C-7 81 of 234

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, 2006 GROUP I - ONSITE LOCATIONS GROUP II- NEAR SITE LOCATIONS GROUP III- FAR FIELD LOCATIONS GROUP IV - CONTROL LOCATIONS COLLECTION MIN MAX MEAN + COLLECTION MIN MAX MEAN t COLLECTION MIN MAX MEAN+ COLLECTION MIN MAX MEAN +/-

PERIOD 2 SD PERIOD 2 SD PERIOD 2 SD PERIOD 2 SD U

12,'29/05 - 02/02106 15 25 20 +/- 8 12J29/05 - 02/02/06 14 23 19 +6 12/29/05 - 02J02106 16 27 20 +/- 6 12/29/05 - 02/02/06 12 22 18 +/- 8 02/I02/06 - 03/02/06 17 28 22 +/- 8 02/02/06 - 03/02/06 14 28 21 + 10 02/02/06 - 03/02/06 18 29 22 +/-8 02/02/06 - 03/02/06 17 28 22 +/- 11 Ozi 10 23 14 +/- 7 03/02/06 - 03/30/06 11 20 15 +/- 7 03 02/06 - 03/30106 11 21 14 t 7 03/02/06 - 03/30/06 12 24 15 1+/-8 03/02/06 - 03/30/06 03/30/06 - 04/27/06 12 25 17 t 8 03/30/06 - 04/27/06 11 24 16 +/- 8 03/30/06 - 04/27/06 11 24 16 +/- 11 04, 30/06 - 04/27/06 10 23 15 t 9 27/06 - 06/01/06 6 24 14

12 04/27/06 - 06/01/06 < 5 24 15 t 12 04/27/06 - 06/01/06 6 23 14 +/- 9 04/27/06 - 06/01/06 9 25 15 +/- 13 1)1/06 - 06/29/06 12 24 18 +/- 10 06/01/06 - 06/29/06 12 21 16 +/- 8 06/01/06 - 06/29/06 11 23 17 +/- 8 06/01/06 - 06/29/06 8 18 15 9 29/06 - 08/03/06 16 31 24 1 11 06/29/06 - 08/03/06 13 31 23 +/- 12 06/29/06 - 08/03/06 14 34 23 t 11 06/29/06 - 08/03/06 18 34 26 +/-15 08J03/06 - 08/31/06 19 32 24 +/- 10 08/03/06 - 08/31/06 19 36 25 +/- 11 08/03/06 - 08/31/06 20 37 26 +/- 10 08/03/06 - 08/31/06 19 33 25 12 31/06 - 09/28/06 15 20 18 +/- 4 08/31/06 - 09/28/06 12 24 19 +/- 7 08/31/06 - 09/28/06 15 24 20 +/- 5 08/31/06 - 09/28/06 17 19 18 1 09128/06 - 11/02/06 10 25 18 +/- 9 09/28/06 - 11/02/06 16 24 19 +/- 5 09/28/06 - 11/02/06 12 28 20 19 09/28/06 - 11/02/06 15 25 19 8 11/!/02/06 - 11/30/06 15 33 25 1 14 11/02106 - 11/30/06 16 34 25 +/- 13 11/02/06 - 11/30/06 18 37 27 +/- 15 11/02/06 - 11/30/06 20 38 27 15 11/i/30/06 - 12/28/06 25 35 29 +/- 7 11/30/06 - 12/28/06 25 33 29+/-8 11/30/06 - 12/28/06 20 38 29 +/- 10 11/30/06 - 12/28/06 21 32 27 9 12/29/05 - 12/28/06 6 35 20

9 12/29/05 - 12/28/06 < 5 36 20 +/- 9 12/29/05 - 12/28/06 6 38 21 1 10 12/29/05 - 12/28/06 8 38 20 +/- 10 00 00 b.

TABLE C-V.3 CONCENTRATIONS OF GAMMA EMITTERS IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 21 RESULTS IN UNITS OF E-3 PCI/CU METER

2 SIGMA STC COLLECTION MN-54 CO-58 FE-59 CO-60 ZN-65 ZRNB-95 CS-134 CS-137 BALA140 PERIOD L-01 03/30106 <6 < 10 < 48 <4 <9 < 10 <4 < 3020 06/29/06 <5 < 13 < 35 '3 <15 <11 <5 < 1830 09/28/06 <2 <5 < 30 <2 <7 <6 <2 < 2420 12/28/06 <2 <3 <9 <1 <3 <3 <1 < 101 MEAN 4 +/-4 8+/-9 31 33 3+/-3 9 10 7+/-8 3+/-3 2 +/-2 1843 2517 L-03 03/30/06 < 14 < 51 <3 <9 < 16 <5 <4 < 3680 06/29/06 <10 <34 <4 < 12 <11 <4 <4 < 1570 09/28/06 <6 < 17 <2 <4 <7 <2 <2 < 998 12/28/06 <5 <13 <2 <7 <5 <3 <2 < 200

'C MEAN 4+/-4 9 8 29 +/-35 3+/-2 8 6 10 10 3+3 3+/-2 1612 +/- 2977 L-04 03/30/06 <4 '11 < 62 <15 < 13 '4 '4 < 3740 06/29/06 <5 <9 < 15 < 13 <8 <4 <3 < 780 09/28/06 <1 <5 < 12 <5 <6 <2 '1 < 1700 12/28/06 <2 <4 < 12 <9 <5 <2 '2 <222 MEAN 3+3 7 7 25:49 3+/-2 11 +9 8+7 3+/-3 3+/-2 1611 +/-3090 L-05 03/30/06 <5 < 12 '73 <5 < 12 < 15 <5 < 2640 06/29/06 <3 <6 < 26 <3 <6 <5 <2 < 917 09/28/06 <2 <4 < 26 <2 <6 <6 <2 < 1530 12/28/06 <2 <3 <11 <2 <4 <3 <2 <153 MEAN 3+3 6+/-7 34+/-54 3+/-3 7:7 7+10 3 :3 3+/-3 1310 +/- 2101 00 w

TABLE C-V.3 CONCENTRATIONS OF GAMMA EMITTERS IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2006 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA STC COLLECTION MN-54 CO-58 FE-59 CO-60 ZN-65 ZRNB-95 CS-134 CS-137 BALA140 PERIOD L-06 03/30/06 <8 <41 <11 < 10 <5 <3 < 3500 06/29/06 < 14 <30 < 10 <9 <5 <5 < 1350 09/28/06 <6 < 27 <6 <9 <2 <2 < 2210 12/28/06 <3 <8 <3 <3 <2 <1 < 100 MEAN 3+3 8 9 26 +/-28 3+/-5 7+/-1:7 8+/-6 3+/-3 3 3 1790 +/-2864 L-07 03/30/06 <5 <9 < 52 < 14 < 13 <5 < 1850 06/29/06 <3 <9 < 12 <6 <5 <2 < 655 09/28/06 '2 <4 < 20 <4 <7 <2 < 2000 12/28/06 <2 <5 < 16 <5 <5 <3 < 207 0

MEAN 3+3 715 25 +/-36 3+/-2 7+9 7+/-8 3+/-3 3+/-3 1178 + 1768 L-08 03/30/06 < 14 < 49 <4 < 13 < 12 <6 '4 < 3050 06/29/06 <11 < 33 <3 < 12 < 13 <5 '4 < 2210 09/28/06 <6 < 31 <3 <7 '11 <2 <2 < 2520 12/28/06 <4 < 10 <2 <6 <4 <2 <2 '226 MEAN 4+/-3 9 +/-9 31 +/-32 3+/-2 10+/- 7 10+/- 9 4+/-4 3 +/- 2 2002 +/-2467 L-10 03/30/06 < 12 < 62 < 12 < 13 1 < 1810 06/29/06 <8 < 28 <11 <7 3 < 303 09/28/06 <4 < 25 <5 <5 1 < 4020 12/28/06 <6 <16 <5 <6 < 262 MEAN 3+/-4 7 +/- 7 33 +/-40 3+/-3 8+/-7 8+/-7 3+/-2 3 +/-2 1599 +/-3535 00 0p

TABLE C-V.3 CONCENTRATIONS OF GAMMA EMITTERS IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2006 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA STC COLLECTION MN-54 CO-58 FE-59 CO-60 ZN-65 ZRNB-95 CS-134 CS-137 BALA140 PERIOD L-11 03/30/06 <4411

22 '<4 <6 < 13 *4 2 < 3020 06/29/06 <3 < 10

28 <4 <7 <7

3 2 < 831 09/28106 <2 <6

16 2 <5 <7 <2 <2 <1900 12128/06 <17 <3 <10 '6 <3 <3 <236 MEAN 3+/-2 8+/-5 21 1 11 3+/-2 7+/-4 8+/-7 3+/-2 2+/-1 1497 +/- 2454 0

00

TABLE C-VI.1 CONCENTRATIONS OF 1-131 IN AIR IODINE SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2006 RESULTS IN UNITS OF E-3 PCI/CU METER + SIGMA GROUPI I GROUPII I GROUP III I GROUP IV WEEK L-UJ L~-u L-U1 L-U0 L-U4 L-U f L-UU L-1 1 L-1 U L-uq L-W L4JV L-1 11 L-10 1 <27 <36 < 35 <35 '35

35 2

3 <23

41

42

41 < 40 ' 41 < 41 ' 41 ' 41 4

<42

41 ' 41

27 <42 <38 '38 ' 37 ' 38

<23

35

35

35 ' 35 < 41 ' 41 ' 40

40

41 < 41 < 41 < 20

41 '30 ' 30 <30

30

37 ' 19 ' 37 ' 38 <37 <30

30 '30 '30

'28

27 < 27 ' 20 '26 <36 ' 36 ' 35 '35 (1)

<61 <62 '64 '64 ' 68 <56 '54 < 55 '55

' 59 '59 ' 58 ' 63 '60 <33 <64 '64 '64

' 39 '38 ' 39 ' 42 ' 39 < 41 ' 43 ' 23 ' 43

' 68 '68 ' 67 < 61 '67 < 63 '41 < 61 ' 62

<56 '56 ' 55 < 43 '55 <44 '33 '44 '44 568 '70 ' 68 ' 65 < 68 < 67 '68 < 36 ' 66

' 65 '68 ' 67 '67 ' 49

70 866 <64 ' 65

'62 '60 ' 61 < 31

61 < 51 < 51

51

51

'49 ' 49 ' 49 ' 32 ' 49 ' 61 '60 '60 ' 60

<67 ' 65 ' 67 '44 '68 <67 '69 ' 69 ' 69

<60 <59 '59

61 <33 <54 '57 '57

57

67 ' 65 '65 ' 63 <64 <68 <68 ' 45 ' 68

'68 ' 65 867 ' 37 ' 67 < 67 ' 67 '67

67

' 41 ' 38 <40 ' 33 (2) < 59 <58 '58 <58

'68 ' 65 '68 ' 36

65 <65 ' 65 '65 ' 65

< 67 ' 63 '64

51

64 <68 '68 '68 '68

'48

46 ' 47 ' 38 <47 <56 ' 55 '56 '56

70

65 '68 ' 37 '68 ' 68 ' 68 <68 '68

62 '58 '60

48 '60 '56 ' 59 '60 '59

'29 ' 28 '29

23 '28 <38 ' 36 ' 37 '37

' 65 8 62 '64 ' 63 <64 <36

63 ' 63 '63

29 <27 ' 28

15 '28 < 27 < 27 '26

27

' 68 <64 ' 67 ' 68 '67 <'6 '53 < 67

67

' 69 '67 ' 37 ' 69 '66 <69 ' 68 '68 '68

'57 '53 ' 41 '55 <54 <68 ' 68 ' 67 '68

32 '30

21

31 '31 < 32 ' 33 ' 33 ' 33

'34 '48 ' 49 ' 49 '48 <63 '60 ' 65 ' 65

' 45 '43

24 '44 '44 <44 ' 43 ' 43 '44

' 37 '35

36 '39 ' 36 ' 40 ' 39

22 ' 39

' 18 ' 17 < 17

17 <13 '36 '36 ' 36 ' 36

< 19 ' 17 < 18

13 -c18 '20 '20 ' 20 ' 20

'38 '36 ' 37 ' 20 '37 <36 '36 '35 ' 35

'49 '26 ' 49

48 ' 49 < 51 <48

51

51

'35 ' 33 '34 ' 29 ' 33 <37 '37 '37 ' 37

<24 '22 '22

12 '22 <40 <40

40

40

<24 ' 23 < 16 <24 '25 '24 ' 18 <24

24

<55 ' 51 ' 31 ' 53 ' 53 <47 <46 '46 <46

<50 ' 47 '46

46 <48 <46 ' 45 ' 45 ' 45 MEAN 48 133 46 133 45 133 41

33 47 1 32 48 1 29 48

30 47 130 50 1 29 (1) SEE PROGRAM CHANGES SECTION FOR EXPLANATION (2) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATI'LOI 12 86 of 234

TABLE C-VII.1 CONCENTRATIONS OF 1-131 IN MILK SAMPOLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2006 RESULTS IN UNITS OF PCI/LITER

2 SIGMA COLLECTION CONTROL DAIRY PERIOD L-42 01105/06 < 0.6

< 0.4 02/02/06 03/02/06 < 0.6 04/06/06 < 0.3 05/05/06 < 0.7 05/19106 < 0.6 06/02/06

0.7 06/16106 < 1.0 06130/06 < 2.9 (1) 07114/06 < 0.6 07128/06 < 0.8 08/10106 < 0.3 08/25/06 < 0.7 09/08/06 < 0.3 09/22/06 < 0.5 10/06/06 < 0.3 10119/06 < 0.7 11/03/06 < 0.7 12/07/06 < 0.3 MEAN 0.7 +/- 1.1 (1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION C- 13 87 of 234

TABLE C-VII.2 CONCENTRATIONS OF GAMMA EMITTERS IN MILK SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2006 RESULTS IN UNITS OF PCI/LITER +/-2 SIGMA STC COLLECTION MN-54 CO-58 FE-59 CO-60 ZN-65 ZRNB-95 CS-134 CS-137 BA-140 LA-140 PERIOD L-42 01/05/06 <8 <9 <19 <9 < 24 <9 <11 <9 < 38 < 10 02/02/06 <8 <9 <20 <9 < 23 <9 < 10 <9 <44 < 10 03/02/06 <6 <7 < 16 <7 < 17 <7 <7 <7 <33 <8 04/06/06 <8 <9 <17 <8 < 25 <10 < 13 <8 < 41 <13 05/05/06 <8 <8 <20 <9 < 21 < 10 <8 <8 < 51 <15

<9 <9 <9 < 10 < 43 < 13 05/19/06 <8 <9 < 21 < 24 06/02/06 <7 <8 < 19 <8 <18 <8 <8 <8 <44 < 14 06/16/06 <10 <9 < 23 < 12 <22 <11 < 10 <11 < 38 < 13 06/30/06 <5 <5 <12 <6 < 12 <5 <5 <5 < 27 <9 07/14/06 <6 <8 < 17 <7 < 17 <7 <7 <7 <44 < 14 07128/06 <6 <7 < 18 <6 < 19 <8 <8 <7 < 37 < 12 08/10/06 <7 <6 < 15 <7 < 15 <6 <6 <5 < 36 <9 08/25/06 <6 <6 < 13 <7 <12 <7 <5 <5 < 33 < 13

- 09/08/06 <6 <6 <16 <5 <17 <7 <4 <5 < 39 <13 "r* 09/22)06 <7 <7 < 15 <7 < 15 <9 <7 <8 <29 <8 10/06/06 <5 <6 < 16 <6 < 10 <7 <5 <5 < 49 < 12 10/19/06 <5 <7 < 14 <6 < 14 <6 <5 <6 < 40 < 14 11/03/06 <6 <5 < 14 <5 < 12 <6 <5 <6 < 43 <11 12/07/06 <6 <6 < 17 <7 < 16 <6 <6 <6 < 41 <8 MEAN 7+/-3 7+3 17+6 7 +/-4 17 +/-9 8+/-3 7 +/- 5 7 +/-4 39 +/- 12 11 +/-.5 00 00 20

TABLE C-VIII.1 CONCENTRATIONS OF GAMMA EMITTERS IN FOOD PRODUCT SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2006 RESULTS IN UNITS OF PCI/KG WET +/- 2 SIGMA STC COLLECTION MN-54 CO-58 FE-59 CO-60 ZN-65 ZRNB-95 1-131 CS-1 34 CS-137 BALA140 PERIOD L-QUAD 1 09109/06

13

14 (36 ( 18 <32 ( 14 (54 <11 < 14 < 24 Turnip greens L-QUAD 1 09/09106 (15

18

40 ( 15 (32 ( 18 (54 <13 < 14 (29 Turnips MEAN 14 +/- 3 16 +5 38+/-6 16+/- 4 32 +/- I 16 +/- 6 54+/-1 12+/- 2 14 1 26+/-8 L-QUAD 2 09/09=06 <9 <11 (24 <8 ( 19

12 ( 55 <8 (9 ( 31 Beet greens L-QUAD 2 09/09/06

10 < 12

24 < 11 ( 21

12

58 < 10 < 10 ( 33 I

Beets 9+3 20 +/- 2 56+5 9+/-2 10 1 32 +/- 3 MEAN 9 +/- 0.2 11 +/-1 24 +/- 0.0 12 +/- 0.3

10 <11 ( 24 (9 (20 <11 (54 <8 (9 ( 20 L-QUAD 3 09/09/06 Carrot greens

<11 (8 <9 (27 L-QUAD 3 09/09/06 <8 ( 10 (24 ( 12 ( 19 ( 56 Carrots MEAN 9+/-2 11 +2 24 +/- I 11 +5 19 +/- 2 11 +/- 0.1 55 +/- 3 8+/-0.1 9+/-1 23 +/- 10 L-QUAD 4 09/09/06 < 12

12 ( 31

14 ( 28 < 13 (42 (9 < 12 ( 27 Broccoli L-QUAD 4 09/09=08 <7 ( 10 <22 <8 ( 18 <8 ( 56 (7 <8 ( 23 Onions MEAN 9+6 11 +2 26 +/- 12 11 +9 23 +/- 15 10 +/- 6 49 +/- 19 8+/-3 10+/-5 25 +/- 5

< 10 < 14 ( 48 <1 0 <11 ( 22 L-QUAD C 09/09/06 < 12 <13

33 <27 Beets L-QUAD C 09/09/06 < 14 < 14 < 41 < 14 < 38 < 15 < 49 < 13 < 14 ( 26 00 Lettuce

ý0 48+/-1 11 +/-4 13 +/-4 24 +/-7 MEAN 13 +/- 4 13 +/- 3 37 +/- 11 12 +/- 6 33 +/- 15 15 +/- 1

TABLE C-IX.1 QUARTERLY TLD RESULTS FOR LASALLE COUNTY STATION, 2006 RESULTS IN UNITS OF MILLI-ROENTGEN/QUARTER +/- 2 STANDARD DEVIATIONS STATION MEAN JAN - MAR APR-JUN JUL-SEP OCT-DEC CODE *2S. D.

L-01-1 25.3 + 7.7 21 23 L-01-2 26.8 + 5.0 28 23 L-03-1 26.0 + 5.7 28 22 L-03-2 25.0 + 4.9 28 22 L-04-1 26.0 + 4.3 29 25 L-04-2 24.5 + 5.3 27 21 L-05-1 24.5 5.3 27 21 L-05-2 25.5 + 4.8 29 24 L-06-1 27.5:1 5.3 31 25 L-06-2 27.5 + 5.3 31 25 L-07-1 25.3 + 6.6 30 23 L-07-2 26.8 + 4.4 29 24 L-08-1 25.3 + 3.0 27 24 L-08-2 26.0 +/- 4.3 29 24 L-10-1 23.3 :17.5 28 19 L-10-2 22.0 + 4.3 24 19 L-101-1 27.5

6.2 31 24 L-101-2 26.8 + 5.5 30 24 L-102-1 28.0 + 5.4 29 24 L-102-2 32.0-* 14 33 24 L-103-1 27.3 + 5.0 30 (1)

L-103-2 27.0 + 6.7 31 23 L-104-1 25.3 + 6.2 27 21 L-104-2 26.3 + 5.7 30 24 I-105-1 27.5 +/- 5.3 29 24 L-105-2 27.8 : 5.7 32 26 1-106-1 27.8 + 3.4 30 26 L-106-2 26.3 + 1.9 27 25 L-107-1 26.3

7.2 31 24 L-107-2 26.5 + 6.2 31 25 L-108-1 28.0 - 5.9 32 25 L-108-2 23.8 +/- 5.7 28 22 L-109-1 26.0 +/-17.3 30 22 L-109-2 26.8 : 6.6 31 23 L-110-1 27.5 +/- 2.0 28 26 L-110-2 27.5 +/- 6.2 32 26 L-111B-1 27.0 +/- 5.9 31 26 L-1118-2 28.3 + 5.7 32 26 L-112-1 25.8 + 3.8 27 26 L-112-2 27.3

2.5 29 26 L-1 13A-1 27.8 +/- 6.2 32 25 L-1 13A-2 26.8 +/- 4A 29 26 L-114-1 27.5 +/- 3.8 30 26 L-114-2 27.5

2.6 29 26 L-115-1 23.8 t 4.4 27 23 L-115-2 23.8 +/- 5.3 26 21 L-116-1 25.3 +/- 1.9 26 24 L-116-2 24.3 +/- 2.5 26 24 (1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION C- 16 90 of 234

TABLE C-IX.1 QUARTERLY TLD RESULTS FOR LASALLE COUNTY STATION, 2006 RESULTS IN UNITS OF MILLI-ROENTGEN/QUARTER +/-2 STANDARD DEVIATIONS STATION MEAN JAN - MAR APR-JUN JUL-SEP OCT-DEC CODE

2 S. D.

L-201-3 22.5

6.2 26 19 21 24 L-201-4 26.8

5.0 30 24 26 27 L-202-3 24.3 1 5.7 28 22 22 25 L-202-4 24.3 : 4.7 26 21 24 26 L-203-1 26.0 +/- 4.9 29 23 26 26 L-203-2 25.3 +/- 5.7 29 22 25 25 1-204-1 28.3

5.7 32 26 26 29 L-204-2 26.3 +/- 4.4 27 23 27 28 L-205-1 26.3 +/- 3.0 28 25 25 27 L-205-2 25.8 +/- 6.6 29 22 24 28 L-205-3 26.3 +/- 6.6 31 26 24 24 L-205-4 26.3 +/- 4.4 27 24 25 29 L-206-1 27.5 +/- 5.8 31 24 27 28 L-206-2 27.3 +/- 4.4 30 25 26 28 L-207-1 26.5 +/- 6.8 30 22 26 28 L-207-2 25.3 +/- 7.2 30 22 23 26 L-208-1 25.5 +/- 2.6 26 24 25 27 L-208-2 26.3 +/- 4.7 28 23 26 28 1-209-1 26.5 +/- 6.2 31 24 25 26 L-209-2 26.8 +/- 7.5 31 22 26 28 L-210-1 28.8 +/- 5.0 32 29 28 26 L-210-2 26.5 +/- 3.5 28 24 27 27 L-211-1 27.0 +/- 3.3 29 25 27 27 L-211-2 27.8 +/- 6.8 32 25 25 29 L-212-1 27.0 +/- 2.8 28 25 27 28 L-212-2 26.5 +/- 4.8 28 23 27 28 L-213-3 24.0 +/- 5.9 27 21 22 26 L-213-4 25.0 +/- 7.8 29 20 24 27 L-214-3 24.8 +/- 5.0 28 22 25 24 L-214-4 26.8 +/- 8.5 32 22 25 28 L-215-3 26.8 +/- 6.6 31 23 26 27 L-215-4 27.5 +/- 6.6 32 24 27 27 L-216-3 27.8 +/- 6.0 32 25 27 27 L-216-4 26.5

6.2 31 24 26 25 C- 17 91 of 234

TABLE C-IX.2 MEAN QUARTERLY TLD RESULTS FOR THE INNER RING, OUTER RING, OTHER AND CONTROL LOCATIONS FOR LASALLE COUNTY STATION, 2006 RESULTS IN UNITS OF MILLI-ROENTGEN/QUARTER 12 STANDARD DEVIATIONS OF THE STATION DATA STATION INNER RING OUTER RING OTHER CONTROL CODE

2 S. D.

JAN-MAR 29.6 1:4.0 29.4

3.9 28.1 14.9 26.0 +/- 5.7 APR-JUN 24.4 1 3.1 23.4

3.8 23.3 +/- 2.8 19.0 +/- 0.0 JUL-SEP 26.0 1 6.9 25.4

3.3 25.6 +/- 3.9 23.5 +/- 4.2 OCT-DEC 26.9 1 3.4 26.9

2.8 26.4 +/- 2.3 23.5 +/- 1.4 TABLE C4X.3

SUMMARY

OF THE AMBIENT DOSIMETRY PROGRAM FOR LASALLE COUNTY STATION, 2006 RESULTS IN UNITS OF MILLI-ROENTGEN/QUARTER LOCATION SAMPLES PERIOD PERIOD PERIOD MEAN ANALYZED MINIMUM MAXIMUM +/-2S. D.

I INNER RING 127 21 41 26.7 1+/-5.9 OUTER RING 136 19 32 26.2 +/- 5.6 OTHER 56 21 31 25.8 +/- 5.0 CONTROL 8 19 28 23.0 +/- 6.0 INNER RING - L-101-1, L-101-2, L-102-1, L-102-2, L-103-1, L-103-2, L-104-1, L-104-2, L-105-1, L-105-2, L-106-1, L-106-2, L-107-1, L-107-2, L-108-1, L-108-2, L-109-1, L-109-2, L-110-1, L-110-2 L-111b-1, L-111b-2 OUTER RING - L-201-3, L-201-4, L-202-3, L-202-4, L-203-1, L-203-2, L-204-1, L-204-2, L-205-1, L-205-2, L-206-1, L-206-2, L-207-1, L-207-2, L-208-1, L-208-2, L-209-1, L-209-2, L-210-1, L-211-2 L-211-2, L-212-1, L-212-2, L-213-3, L-213-4, L-214-3, L-214-4, L-215-3, L-215-4, L-216-3, L-216-4 OTHER STATIONS - L-01-1, L-01-2, L-03-1, L-03-2, L-04-1, L-04-2, L-05-1, L-05-2, L-06-1, L-06-2 L-07-1, L-07-2, L-08-1, L-08-2, 1-11-1, L-1 1-2 CONTROL STATIONS = L-10-1, L-10-2 C- 18 92 of 234

TABLE C-X.1

SUMMARY

OF COLLECTION DATES FOR SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2006 SURFACE WATER (TRITIUM LIQUID SCINTILLATION)

COLLECTION PERIOD L-21 L-40

[ U JAN-MAR 01/05/06 - 03/30/06 01/05106 - 03/30/06 APR-JUN 04/06/06 - 06/29/06 04/06/06 - 06/29/06 JUL-SEP 07/06/06 - 09/28106 07/06/06 - 09/28106 OCT-DEC 10/05/06 - 12/28106 10/05/06 - 12/28/06 SURFACE WATER (GROSS BETA & GAMMA SPECTROSCOPY)

COLLECTION PERIOD L-21 L-40 JAN 01/05/06 - 01/26/06 01/05/06 - 01/26/06 FEB 02/02/06 - 02/23/06 02/02/06 - 02/23/06 MAR 03/02/06 - 03/30/06 03/02/06 - 03/30/06 APR 04406/06 - 04/27/06 04/06/06 - 04/27/06 MAY 05/04/06 - 05/25/06 05/04106 - 05/25/06 JUN 06/01/06 - 06/29/06 06/01/06 - 06/29/06 JUL 07/06/06 - 07/27/06 07/06106 - 07/27/06 AUG 08/03/06 - 08/31/06 08/03/06 - 08/31/06 SEP 09/07/06 - 09/28/06 09/07/06 - 09/28/06 OCT 10/05/06 - 10/26/06 10/05/06 - 10/26/06 NOV 11/02/06 - 11/30/06 11/02/06 - 11/30/06 DEC 12/07/06 - 12/28/06 12/07/06 - 12/28/06 GROUNDIWELL WATER (TRmUM & GAMMA SPECTROSCOPY)

COLLECTION PERIOD L-27 L-28 JAN-MAR 01112106 01112/06 APR-JUN 04/13/06 04/13/06 JUL-SEP 07/13/06 07/13/06 OCT-DEC 10/19/06 10/19/06 C- 19 93 of 234

TABLE C-X.1

SUMMARY

OF COLLECTION DATES FOR SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2006 AIR PARTICULATE (GAMMA SPECTROSCOPY)

COLLECTION L-01 L-03 L-04 L-05 L-06 PERIOD JAN-MAR 12/29/05 - 03/30/06 12/29105 - 03130/06 12/29/05 - 03/30/06 12/29/05 - 03/30/06 12/29/05 - 03/30/06 APR-JUN 03130/06 - 06/29/06 03)30/06 - 06/29/06 03130/06 - 06/29/06 03/30/06 - 06/29/06 03/30/06 - 06/29/06 JUL-SEP 06/26/06 - 09/28/06 06/26/06 - 09/28106 06/26/06 - 09/28/06 06/26/06 - 09/28/06 06/26/06 - 09/28/06 OCT-DEC 09/28/06 - 12/28/06 09128/06 - 12/28106 09/28/06 - 12/28/06 09/28/06 - 12/28/06 09/28/06 - 12/28/06 AIR PARTICULATE (GAMMA SPECTROSCOPY)

COLLECTION L-07 L-08 L-10 L-11 PERIOD JAN-MAR 12/29/05 - 03/30/06 12/29/05 - 03/30/06 12/29/05 - 03/30/06 12/29/05 - 03/30/06 APR-JUN 03/30106 - 06/29/06 03/30/06 - 06/29/06 03/30/06 - 06/29/06 03/30/06 - 06/29/06 JUL-SEP 06/26/06 - 09/28/06 06/26/06 - 09/28/06 06/26/06 - 09/28/06 06/26/06 - 09/28/06 OCT-DEC 09/28106 - 12/28/06 09/28/06 - 12/28/06 09/28106 - 12/28/06 09/28/06 - 12/28/06 C-20 94 of 234

TABLE C-X.1

SUMMARY

OF COLLECTION DATES FOR SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2006 AIR PARTICULATE (GROSS BETA & 1-131)

COLLECTION L-01 L-03 L-04 L-05 L-06 PERIOD

- u1,u~lu~

I IZ/Z91Ub - UIIUwub fz9/L/ub - U1I/U/Uo 12/he"IUb - UIlUw/Ub 1Z/;eIUb - UlIUDIUO 9IZ/IUD

- UliUOIUb

01/05/06 - 01/12/06 01/05/06 - 01/12/06 01/05/06 - 01/12/06 01105106 - 01/12/06 01/05/06 - 01/12/06 01/12/06 - 01/19/06 01/12/06 - 01/19/06 01/12/06 - 01119/06 01112/06 - 01/19/06 01/12/06 - 01/19/06

01/19/06 - 01/26/06 01/19/06 - 01/26/06 01/19/06 - 01/26/06 01/19/06 - 01/26/06 01/19/06 - 01/26/06 01/26/06 - 02/02/06 01/26/06 - 02/02/06 01/26/06 - 02/02/06 01/26/06 - 02/02/06 01/26/06 - 02/02/06

02/02/06 - 02/09/06 02/02/06 - 02/09/06 02/02/06 - 02/09/06 02/02/06 - 02/09/06 02/02/06 - 02/09/06 02/09/06 - 02/16/06 02/09/06 - 02/16/06 02/09/06 - 02/16/06 02/09/06 - 02/16/06 02/09/06 - 02/16/06

02/16/06 - 02/23/06 02/16/06 - 02/23/06 02/16/06 - 02/23/06 02/16/06 - 02123106 02/16/06 - 02/23/06 02/23/06 - 03/02/06 02/23/06 - 03/02/06 02/23/06 - 03/02/06 02/23106 - 03/02/06 02/23/06 - 03/02/06

03/02/06 - 03/09/06 03/02/06 - 03/09/06 03/02/06 - 03/09/06 03102/06 - 03/09106 03/02/06 - 03/09/06 03/09/06 - 03/16/06 03/09/06 - 03/16/06 03/09106 - 03/16/06 03/09/06 - 03116/06 03/09/06 - 03/16/06

03/16/06 - 03/23/06 03/16/06 - 03/23/06 03/16/06 - 03/23/06 03116/06 - 03/23/06 03/16/06 - 03/23/06 03/23/06 - 03/30/06 03/23/06 - 03/30/06 03/23/06 - 03/30/06 03/23/06 - 03/30/06 03/23/06 - 03/30/06

03130/06 - 04/06/06 03/30/06 - 04/06/06 03/30/06 - 04/06/06 03/30/06 - 04/06/06 03/30/06 - 04/06/06 04/06/06 - 04/13/06 04/06/06 - 04/13/06 04/06/06 - 04/13/06 04106/06 - 04113/06 04/06/06 - 04/13/06 04113/06 - 04/20/06 04/13/06 - 04/20/06 04/13/06 - 04/20/06 04113/06 - 04/20/06 04/13/06 - 04/20/06 04/20/06 - 04/27/06 04/20106 - 04/27/06 04/20/06 - 04/27/06 04120/06 - 04/27/06 04/20/06 - 04/27/06 04/27/06 - 05104/06 04/27/06 - 05/04/06 04/27106 - 05/04/06 04/27/06 - 05/04/06 04/27/06 - 05/04/06 05/04/06 - 05/11/06 05104/06 - 05/11/06 05/04/06 - 05/11/06 05/04/06 - 05/11/06 05/04/06 - 05111/06 05/11/06 - 05/18/06 05/11/06 - 05118/06 05/11/06 - 05118/06 05/11/06 - 05118/06 05/11/06 - 05/18/06 05/18/06 - 05/25/06 05118/06 - 05/25/06 05/18/06 - 05/25/06 05/18/06 - 05/25/06 05/18/06 - 05/25/06 05/25/06 - 06/01/06 05/25/06 - 06/01/06 05/25106 - 06/01/06 05/25/06 - 06/01/06 05/25/06 - 06/01/06 06101/06 - 06/08M06 06/01/06 - 06/08/06 06/01/06 - 06/08/06 06/01/06 - 06108/06 06/01/06 - 06/08/06 06/08/06 - 06/15/06 06/08/06 - 06/15/06 06/08/06 - 06/15106 06/08/06 - 06/15/06 06/08/06 - 06/15/06 06115/06 - 06/22/06 06/15/06 - 06/22/06 06/15/06 - 06/22/06 06115/06 - 06/22/06 06/15/06 - 06/22/06 06/22/06 - 06/29/06 06/22/06 - 06/29/06 06/22/06 - 06/29/06 06/22/06 - 06/29106 06/22/06 - 06/29/06 06/29/06 - 07/06/06 06129/06 - 07106/06 06/29/06 - 07/06/06 06/29/06 - 07/06106 06/29/06 - 07/06/06 07/06/06 - 07/13/06 07/06/06 - 07/13/06 (1) 07106/06 - 07113/06 07/06/06 - 07/13/06 07113/06 - 07/20/06 07/13/06 - 07/20/06 07113/06 - 07/20/06 07/13/06 - 07/20/06 07/13/06 - 07/20/06 07/20/06 - 07/27/06 07/20/06 - 07/27/06 07/20/06 - 07/27/06 07/20/06 - 07/27/06 07/20/06 - 07/27/06 07/27/06 - 08/03/06 07/27/06 - 08/03/06 07/27/06 - 08/03/06 07/27/06 - 08/03/06 07/27/06 - 08/03/06 08/03/06 - 08/09/06 08/03/06 - 08/09/06 08/03/06 - 08/09/06 08103/06 - 08/09106 08/03/06 - 08/09/06 08/09/06 - 08/16/06 08/09/06 - 08/16/06 08/09/06 - 08/16/06 08/09/06 - 08/16/06 08/09/06 - 08/16/06 08116/06 - 08/24/06 08/16/06 - 08/24/06 08/16/06 - 08/24/06 08/16/06 - 08/24/06 08/16/06 - 08/24/06 08/24/06 - 08/31/06 08/24/06 - 08/31/06 08/24106 - 08/31/06 08/24/06 - 08/31/06 08/24/06 - 08/31/06 08/31106 - 09107/06 08/31/06 - 09/07/06 08/31/06 - 09/07/06 08/31/06 - 09/07/06 08/31/06 - 09/07/06 09/07/06 - 09/14/06 09/07/06 - 09/14/06 09/07/06 - 09/14/06 09107/06 - 09114/06 09/07/06 - 09/14/06 09/14/06 - 09/21/06 09/14/06 - 09/21/06 09/14/06 - 09/21/06 09114/06 - 09/21/06 09/14/06 - 09/21/06 09/21/06 - 09/28/06 09/21/06 - 09/28/06 09/21106 - 09/28/06 09/21/06 - 09/28/06 09/21/06 - 09/28/06 09/28/06 - 10/05/06 09/28/06 - 10/05/06 09/28/06 - 10/05/06 09/28/06 - 10/05106 09/28/06 - 10/05/06 10/05/06 - 10/12/06 10/05/06 - 10/12/06 10/05/06 - 10/12/06 10/05/06 - 10112/06 10/05/06 - 10/12/06 10/12/06 - 10/19/06 10/12/06 - 10/19/06 10/12/06 - 10/19106 10112/06 - 10/19/06 10/12/06 - 10/19/06 10/19/06 - 10/26/06 10/19/06 - 10/26/06 10/19/06 - 10/26/06 10/19/06 - 10/26/06 10/19/06 - 10/26/06 10/26/06 - 11/02/06 10/26/06 - 11/02/06 10/26/06 - 11/02/08 10/26/06 - 11/02/06 10/26/06 - 11/02/06 11/02/06 - 11/09/06 11/02/06 - 11/09/06 11/02/06 - 11/09/06 11/02/06 - 11/09/06 11/02/06 - 11/09106 11/09/06 - 11/16/06 11/09/06 - 11/16/06 11/09/06 - 11/16/06 11/09106 - 11/16/06 11/09/06 - 11/16/06 11/16/06 - 11/22106 11/16/06 - 11/22/06 11/16/06 - 11/22/06 11116/06 - 11/22/06 11/16/06 - 11/22/06 11/22/06 - 11/30/06 11/22/06 - 11/30/06 11/22/06 - 11/30/06 11/22/06 - 11/30/06 11/22/06 - 11/30/06 11/30/06 - 12/07/06 11/30/06 - 12/07/06 11/30/06 - 12/07/06 11/30/06 - 12/07/06 11/30/06 - 12/07/06 12/07/06 - 12/14/06 12/07/06 - 12/14/06 12/07106 - 12/14/06 12/07/06 - 12/14/06 12/07/06 - 12/14/06 12/14/06 - 12/21/06 12/14/06 - 12/21/06 12/14/06 - 12/21/06 12/14/06 - 12121/06 12/14/06 - 12/21/06 12/21/06 - 12/28/06 12/21/06 - 12/28/06 12/21/06 - 12/28/06 12/21/06 - 12/28/06 12/21/06 - 12/28/06 (1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION

AIR IODINE SAMPLES COLLECTED BIWEEKLY C- 21 95 of 234

TABLE C-X.1

SUMMARY

OF COLLECTION DATES FOR SAMPLES COLLECTED IN THE VICINITY OF LASALLE COUNTY STATION, 2006 AIR PARTICULATE (GROSS BETA & 1-131)

COLLECTION L-07 L-08 L-10 L-1 1 PERIOD ~ ~d* ~**d ~ ~ .. ~ I*. ~

[ JL ~ ~ .~ .... ~ ~

- wqqwpgmmf4JL U29IU5 UO I

Id.21f/Ut - U iU/UWUb ./MIUt - U IIUwUO ,I.lUO - U IIUO/UO 1/ U-

01/05/06 - 01/12/06 01105/06 - 01/12/06 01/05/06 - 01/12/06 01/05/06 - 01/12/06 01/12/06 - 01/19/06 01/12/06 - 01/19/06 01/12/06 - 01/19/06 01/12/06 - 011/19/06

01/19/06 - 01/26/06 01/19/06 - 01/26/06 01/19/06 - 01/26/06 01/19/06 - 01/26/06 01/26/06 - 02102/06 01/26/06 - 02/02/06 01/26/06 - 02/02/06 01/26/06 - 02/02/06

02/02/06 - 02/09/06 02/02/06 - 02/09/06 02/02/06 - 02/09/06 02/02/08 - 02/09/06 02/09/06 - 02/16/06 02/09/06 - 02116/06 02/09/06 - 02/16/06 02/09/06 - 02/16/06

02/16/06 - 02/23/06 02/16/06 - 02/23/06 02/16/06 - 02/23/06 02/16/06 - 02/23/06 02/23/06 - 03/02/06 02/23/06 - 03/02/06 02/23/06 - 03/02/06 02/23/06 - 03/02/06

03/02/06 - 03/09/06 03/02/06 - 03/09/06 03/02/06 - 03/09/06 03/02/08 - 03/09/06 03/09/06 - 03/16/06 03/09/06 - 03/16/06 03/09/06 - 03/16/06 03/09/06 - 03/16/06

03/16/06 - 03/23/06 03/16/06 - 03/23/06 03/16/06 - 03/23/06 03116106 - 03/23/06 03/23/06 - 03/30/06 03/23/06 - 03/30/06 03/23/06 - 03/30/06 03/23/06 - 03/30/06

03/30/06 - 04/06/06 03/30/06 - 04/06/06 03/30/06 - 04/06/06 03/30/06 - 04/06/06 04/06/06 - 04/13/06 04/06/06 - 04/13/06 04/06/06 - 04/13/06 04/06106 - 04113/06 04/13/06 - 04/20/06 04/13/06 - 04/20106 04/13/06 - 04/20/06 04/13/06 - 04/20/06 04/20/06 - 04/27/06 04/20/06 - 04/27/06 04/20/06 - 04/27/06 04/20/06 - 04/27/06 04/27/06 - 05/04/06 04/27/06 - 05/04/06 04/27/06 - 05/04/06 04/27/06 - 05104/06 05/04/06 - 05/11/06 05/04/06 - 05/11/06 05/04/06 - 05/11/06 05/04/06 - 05/11/06 05/11/06 - 05/18/06 05/11/06 - 05/18/06 05/11/06 - 05/18/06 05/11/06 - 05/18/06 05/18/06 - 05/25/06 05/18/06 - 05/25/06 05/18/06 - 05/25/06 05/18/06 - 05/25/06 05/25106 - 06/01/06 05/25/06 - 06/01/06 05/25/06 - 06/01/06 05/25/06 - 06/01/06 06/01/06 - 06/08/06 06/01/06 - 06/08/06 06/01/06 - 06/08/06 06/01/06 - 06/08/06 06/08/06 - 06/15/06 06/08/06 - 06/15/06 06/08/06 - 06/15/06 06/08/06 - 06/15/06 06/15/06 - 06/22/06 06115/06 - 06/22/06 06/15/06 - 06/22/06 06/15/06 - 06/22/06 06/22/06 - 06/29/06 06/22/06 - 08/29/06 06/22/06 - 06129/06 06/22/06 - 06/29/06 06/29/06 - 07/06/06 06/29/06 - 07/06/06 06/29/06 - 07/06/06 06/29/06 - 07/06/06 07/06/06 - 07/13/06 07/06/06 - 07/13/06 07/06/06 - 07/13/06 07/06/06 - 07/13/06 07/13/06 - 07/20/06 07/13/06 - 07/20/06 07/13/06 - 07/20/06 07/13/06 - 07/20/06 07/20/06 - 07/27/06 07/20/06 - 07/27/06 07/20/06 - 07/27/06 07/20/06 - 07/27/06 07/27/06 - 08/03/06 07/27/06 - 08/03/06 07/27/06 - 08/03/06 07/27/08 - 08/03/06 08/03/06 - 08/09/06 08/03/06 - 08/09/06 08/03/06 - 08/09/06 08/03/08 - 08/09/08 08/09/06 - 08/16/06 08/09/06 - 08/16/06 08/09/06 - 08/16/06 08/09/06 - 08/16/06 08/16/06 - 08/24/06 08/16/06 - 08/24/06 08116/06 - 08/24/06 08/16/08 - 08/24/06 08/24/06 - 08/31/06 08/24/06 - 08/31/06 08/24/06 - 08/31/06 08/24/06 - 08/31/06 08/31/06 - 09/07/06 08/31/06 - 09/07/06 08/31/06 - 09/07/06 08/31/06 - 09/07/06 09/07/06 - 09/14/06 09/07/06 - 09114/06 09/07/06 - 09/14/06 09107/06 - 09/14/06 09/14/06 - 09/21/06 09/14/06 - 09/21/06 09/14/06 - 09/21/06 09114/06 - 09/21/06 09/21/06 - 09/28/06 09/21/06 - 09/28/06 09/21/06 - 09/28/06 09/21/06 - 09/28/06 09/28/06 - 10/05/06 09/28/06 - 10/05/06 09/28/06 - 10/05/06 09/28/06 - 10/05/06 10/05/06 - 10/12/06 10/05/06 - 10/12/06 10/05/06 - 10/12/06 10/05/06 - 10/12/06 10/12/06 - 10/19/06 10/12/06 - 10/19/06 10/12/06 - 10/19/08 10/12/06 - 10119/06 10/19/06 - 10/26/06 10/19/06 - 10/26/06 10119/06 - 10/26/06 10/19/06 - 10/26/06 10/26/06 - 11/02/06 10/26/06 - 11/02/06 10/26/06 - 11/02106 10/26/06 - 11/02/06 11/02/06 - 11/09/06 11/02/06 - 11/09/06 11/02/06 - 11/09/06 11/02/06 - 11/09/06 11/09/06 - 11/16/06 11/09/06 - 11/16/06 11/09/06 - 11/16/06 11/09/06 - 11/16/06 11/16/06 - 11/22/06 11116/06 - 11/22/06 11/16/06 - 11/22/06 11/16/06 - 11/22/06 11/22/06 - 11/30/06 11/22/06 - 11/30/06 11/22/06 - 11/30/06 11/22/06 - 11/30/06 11/30/06 - 12/07/06 11/30/06 - 12/07/06 11/30/06 - 12/07/08 11/30/06 - 12/07/06 12/07/06 - 12/14/06 12/07/06 - 12/14/06 12/07/06 - 12/14/08 12/07/06 - 12/14/06 12/14/06 - 12/21/06 12/14/06 - 12121/06 12/14/06 - 12/21/08 12/14/06 - 12/21/06 12/21/06 - 12/28/06 12/21/06 - 12128/06 12/21/06 - 12/28/06 12/21/06 - 12/28/06

AIR IODINE SAMPLES COLLECTED BIWEEKLY C-22 96 of 234

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 01-01-00 1241-0 12-1-01 12-31-02 12-31-03 12-30-04 L-40 Illinois River Downstream 8-0 101 4.0 2.0-01.0.-0 12-3"-0 12-314*1 12-31-02 12-31-03 12-ZO-04 97 of 234

FIGURE C-1 (cont.)

Surface Water - Gross Beta - Station L-21 and L-40 Collected in the Vicinity of LCS, 2005 - 2006 L-21 Illinois River at Seneca

-l U3 a.

01/27/05 09/18/05 05/10106 12/30/06 L-40 Illinois River Downstream 12.0 01-27-05 09-18-05 05-10-06 12-30-06 DUE TO VENDOR CHANGE IN 2005, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE 2005 AND MDC VALUES AFTER JUNE 2005 98 of 234

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 1400 1300 1100.

1000, looo SOO 100, 600, WOO 500 4 0 0 -

300 200 100-I I I 01-.01-00 12-31-00 12-31-1 121-02 12-31-03 12-304" L-40 Illinois River Downstream 1lo0 +

1400.

1200.

1000' 600, 600+

400+

200 Ut I I I 01-01"00 12-31-0 12-31-01 12-31-02 12-31-03 12-30-04 99 of 234

FIGURE C-2 (cont.)

Surface Water - Tritium - Station L-21 (C) and L-40 Collected in the Vicinity of LCS, 2005 - 2006 L-21 Illinois River at Seneca 1000 800 600 400 200 0 4-03/31/05 10/30/05 05/31/06 12/30/06 L-40 Illinois River Downstream 1000 800 60o C

a.

400 200 03-31-05 10-30-05 05-31-06 12-30-06 DUE TO VENDOR CHANGE IN 2005, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE 2005 AND MDC VALUES AFTER JUNE 2005 100 of 234

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. 1 10.01 6.0 1 4V0 2,0 0.0 ..

0141-,0 12-31-00 12-31-41 12-31-02 12-31-03 12-30-04 L-03 Onsite No. 3 100 6.0-4-0 2.01 0.01-01400 12-31-.0 12-31 -01 12,31 ,,02 12-31 .03 12-30 04 101 of 234

FIGURE C-3 (cont.)

Air Particulates - Gross Beta - Stations L-01 and L-03 Collected in the Vicinity of LCS, 2005 - 2006 L-01 Nearsite No. I 50.0 40.0 E 30.0 g20.0 10.0 0.0 m 01/06/05 07/06/05 01/03106 07/03/06 12/31/06 L-03 Onsite No. 3 50.0, 9

Bit 01-06-05 07-06-05 01-03-06 07-03-06 12-31-06 DUE TO VENDOR CHANGE IN 2005, THE REPORTED UNITS CHANGED FROM E-02 PCI/M3 TO E-03 PCI/M3 102 of 234

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 4,0 0.0 01-0140 1241t40 12-31401 12-3102 12-31-0 124-"4

-2.0 L-06 Nearsite No. 6 10.0 4.0 2.0 0.0 1-"

011-00a 12-31-00 12-3t-01 1241-C 12-31-93 12-"0-04 103 of 234

FIGURE C-4 (cont.)

Air Particulates - Gross Beta - Stations L-05 and L-06 Collected in the Vicinity of LCS, 2005 - 2006 L-05 Onsite No. 5 50.0 40.0

" 30.0 9 20.0 CD 10.0 0.0 14-01-06-05 07-06-05 01-03-06 07-03-06 12-31-06 L-06 Nearsite No. 6 9

CD 01-06-05 07-06-05 01-03-06 07-03-06 12-31-06 DUE TO VENDOR CHANGE IN 2005, THE REPORTED UNITS CHANGED FROM E-02 PCI/M3 TO E-03 PCI/M3 104 of 234

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

Collected in the Vicinity of LCS, 2000 - 2004 L-10 (C) Streator 10,0 -

6.0]

2.0 0.0 0 .. 1 01-01-00 12-3t-00 12-31-01 12-31,02 12-31-03 12-30D04 105 of 234

FIGURE C-5 (cont.)

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

Collected in the Vicinity of LCS, 2005 - 2006 L-10 (C) Streator 50.0 40.0

. 30.0 I.,

20.0 CD 10.0 0.0 I 01-06-05 07-06-05 01-03-06 07-03-06 12-31-06 DUE TO VENDOR CHANGE IN 2005, THE REPORTED UNITS CHANGED FROM E-02 PCI/M3 TO E-03 PCI/M3 106 of 234

FIGURE C-6 Air Particulates - Gross Beta - Stations L-04 and L-07 Collected in the Vicinity of LCS, 2005 - 2006 L-04 Rte. 170 E

9 uJ 07-07-05 01-04-06 07-04-06 01-01-07 L-07 Seneca 50.0.

E 30.0-

,,w 20.0-C, 07-07-05 01-04-06 07-04-06 01-01-07 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 107 of 234

FIGURE C-7 Air Particulates - Gross Beta - Stations L-08 and L-1 I Collected in the Vicinity of LCS, 2005 - 2006 L-08 Marseilles 9

'U 07-07-05 01-04-06 07-04-06 01-01-07 L-11 Ransom 60.0--

50.0 E 40.0 In 30.0 9

20.0-10.0 0.0 "

07-07-05 01-04-06 07-04-06 01-01-07 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 108 of 234

APPENDIX D INTER-LABORATORY COMPARISON PROGRAM 109 of 234

TABLE D-1 ANALYTICS ENVIRONMENTAL RADIOACTIVITY CROSS CHECK PROGRAM TELEDYNE BROWN ENGINEERING, 2006 (PAGE I OF 3)

Identification Reported Known Ratio (c)

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

March 2006 E4964-396 Milk Sr-89 pCVL 91.5 99.2 0.92 A Sr-90 pCi/L 12.2 10.8 1.13 A E4965-396 Milk 1-131 pCi/L 74.4 78.0 0.95 A Ce-141 pCi/L 95.1 104 0.91 A Cr-51 pCilL 278 280 0.99 A Cs-1 34 pCi/L 103 121 0.85 A Cs- 137 pCi/L 87.6 88.8 0.99 A Co-58 pCi/L 93.9 105 0.89 A Mn-54 pCi/L 90.0 93.3 0.96 A Fe-59 pCi/L 83.0 86.6 0.96 A Zn-65 pCiL. 178 176 1.01 A Co-60 pCi/. 118 128 0.92 A E4967-396 AP Ce-141 pCi 89.9 74 1.21 W Cr-51 PCi 253 200 1.27 W Cs-1 34 pCi 71.5 86.1 0.83 A Cs-1 37 pCi 67.5 63.3 1.07 A Co-58 PCi 79.7 74.6 1.07 A Mn-54 pCi 74.9 67 1.12 A Fe-59 pCi 75.5 61.8 1.22 W Zn-65 pCi 146 126 1.16 A Co-60 pCi 91.2 91 1.00 A E4966-396 Charcoal 1-131 pCi 87.4 86.2 1.01 A June 2006 E5018-396 Milk Sr-89 pCi/L 118 129 0.91 A Sr-90 pCi/L 9.29 9.74 0.95 A E5019-396 Milk 1-131 pCi/L 49.9 63.2 0.79 W Ce-141 pCi/L 174 184 0.95 A Cr-51 pCi/L 266 259 1.03 A Cs-134 pCi/L ill 127 0.88 A Cs-1 37 pCi/L 116 117 0.99 A Co-58 pCi/L 101 100 1.01 A Mn-54 pCi/L 144 146 0.98 A Fe-59 pCi/L 96.7 93.6 1.03 A Zn-65 pCi/L 182 185 0.98 A Co-60 pCi/L 126 129 0.98 A E5021-396 AP Ce-141 pCi 113 124 0.91 A Cr-51 pCi 176 174 1.01 A Cs-134 pCi 63.7 85.1 0.75 W Cs-137 pCi 76.8 79.0 0.97 A Co-58 pCi 63.1 67.4 0.94 A Mn-54 pCi 102 99 1.04 A Fe-59 pCi 64.6 62.9 1.03 A Zn-65 pCi 131 125 1.05 A Co-60 pCi 81.6 86.5 0.94 A E5020-396 Charcoal 1-131 pCi 65.4 65.9 0.99 A D-1 110 of 234

TABLE D-1 ANALYTICS ENVIRONMENTAL RADIOACTIVITY CROSS CHECK PROGRAM TELEDYNE BROWN ENGINEERING, 2006 (PAGE 2 OF 3)

Identification Reported Known Ratio (c)

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

September 2006 E5120-396 Milk Sr-89 pCi/L 90.3 89.2 1.01 A Sr-90 pCi/L 11.6 12.4 0.94 A E5121-396 Milk 1-131 pCi/L 67.8 73.8 0.92 A Ce-141 pCi/L 85.0 86.0 0.99 A Cr-51 pCi/L 263 282 0.93 A Cs-134 pCi/L 74.7 85.0 0.88 A Cs- 137 pCi/L 172 175 0.98 A Co-58 pCi/L 107 109 0.98 A Mn-54 pCi/L 110 113 0.98 A Fe-59 pCVL 46.6 43.7 1.07 A Zn-65 pCi/L 144 145 0.99 A Co-60 pCV1L 127 134 0.95 A E5123-396 AP Ce-141 pCi 67.1 66.4 1.01 A Cr-51 pCi 223 217 1.03 A Cs-1 34 pCi 51.7 65.6 0.79 W Cs-1 37 pCi 134 135.0 0.99 A Co-58 pCi 84.8 84.3 1.01 A Mn-54 pCi 95.2 87 1.10 A Fe-59 pCi 41.6 33.7 1.23 W Zn-65 pCi 123 112 1.10 A Co-60 pCi 98.9 103 0.96 A Co-57 pCi 0.922 (1) NA NA E5122-396 Charcoal 1-131 pCi 77.7 90.7 0.86 A December 2006 E5172-396 Milk Sr-89 pCi/L 72.4 72.0 1.01 A Sr-90 pCi/L 7.05 5.90 1.19 A E5173-396 Milk 1-131 pCi/L 71.9 70.8 1.02 A Ce-141 pCi/L 268 294 0.91 A Cr-51 pCi/L 420 433 0.97 A Cs-134 pCi/L 128 147 0.87 A Cs-137 pCll 231 237 0.97 A Co-58 pCVL 82.0 83.8 0.98 A Mn-54 pCiL 113 111 1.02 A Fe-59 pCi/L 79.8 79.7 1.00 A Zn-65 pCi. 170 164 1.04 A Co-60 pCif- 265 281 0.94 A E5175-396 AP Ce-141 pCi 220 210 1.05 A Cr-51 pCi 343 309 1.11 A Cs-134 pCi 90.8 105 0.86 A Cs-137 pCi 185 169.0 1.09 A Co-58 pCi 65.0 59.7 1.09 A Mn-54 pCi 90.6 79 1.15 A Fe-59 pCi 70.7 56.7 1.25 W Zn-65 pCi 136 117 1.16 'A Co-60 pCi 208 200 1.04 A D-2 111 of 234

TABLE D-1 ANALYTICS ENVIRONMENTAL RADIOACTIVITY CROSS CHECK PROGRAM TELEDYNE BROWN ENGINEERING, 2006 (PAGE 3 OF 3)

IIdentification Reported Known Ratio (c)

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

December 2006 E5174-396 Charcoal 1-131 pCi 77.4 85.4 0.91 A (1) Impurity detected but not measured by Analytics.

(a) Teledyne Brown Engineeringreported result.

(b) The Analytics known value Is equalto 100% of the parameterpresentin the standardas determined by gravimetricand/or volumetric measurementsmade duringstandardpreparation.

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

(d) Analycs evaluationbased on TBE InternalQC limits: A= Acceptable. Reported result falls within ratio limits of O.0-1.20.

W-Acceptable with warning. Reported resultfalls within 0.70-0.80 or 1.20-1.30. N = Not Acceptable. Reported result falls outsidethe ratio "lmits of < 0.70 and > 1.30.

D-3 112 of 234

TABLE D-2 ERA ENVIRONMENTAL RADIOACTIVITY CROSS CHECK PROGRAM TELEDYNE BROWN ENGINEERING, 2006 (PAGE 1 OF 1)

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

May 2006 Rad 65 Water Sr-89 pCi/L 30.2 32.4 23.6-41.1 Sr-90 pCi/L 8.74 9.00 0.340- 17.7 Ba-133 pCi/L 10.9 10.0 1.34-18.7 Cs-1 34 pCi/L 39.7 43.4 34.7-52.1 Cs-1 37 pCi/L 199 214 195-233 Co-60 pCi/L 111 113.0 103- 123 Zn-65 pCi/L 146 152 126- 178 Gr-A pCi/L 22.9 21.3 12.1 -30.5 Gr-B pCi/L 23.7 23.0 14.3-31.7 Ra-226 pCi/L 2.64 3.02 2.23 - 3.81 U-Nat pCi/L 74.9 69.1 57.1 -81.1 H-3 pCi/L 7950 8130 6720 - 9540 Rad 65 Water 1-131 pCi/L 18.2 19.1 13.9-24.3 November 2006 Rad 67 Water Sr-89 pCi/L 40.0 39.9 31.2-48.6 Sr-90 pCi/L 16.2 16.0 7.34-24.7 Ba-133 pCi/L 65.0 70.2 58.1 - 82.3 Cs-1 34 pCi/L 27.4 29.9 21.2-38.6 Cs-137 pCi/L 74.4 78.2 69.5 - 86.9 Co-60 pCi/L 61.6 62.3 53.6-71.0 Zn-65 pCi/L 277 277 229 - 325 Gr-A pCi/L 23.3 28.7 16.3-41.1 Gr-B pCi/L 22.0 20.9 12.2-29.6 U-Nat pCi/L 3.18 3.20 0.00 - 8.40 H-3 pCi/L 2930 3050 2430 - 3670 Water 1-131 pCi/L 19.8 22.1 16.9 - 27.3 (a) Teledyne Brown Engineering reportedresult.

(b) The ERA known value Is equal to 100%of the parameterpresent In the standardas determined by gravimetric and/or volumetrc measurementsmade during standard preparation.

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

D-4 113 of 234

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

TELEDYNE BROWN ENGINEERING, 2006 (PAGE 1 OF 3)

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

January 2006 06-MaW15 Water Am-241 Bq/L 1.29 1.30 0.91 -1.69 A Cs-134 79.2 95.1 66.57 - 123.63 A Bq1L A Cs-137 Bq/L -0.188 Co-57 Bq/L 151 166.12 116.28 - 215.96 A Co-60 141 153.50 107.45-199.55 A Bq/L 952.01 666.41 - 1237.61 A H-3 988 Bq/L 129.60 90.72- 168.48 A Fe-55 106.0 Bq/L 315.00 220.50 - 409.50 A Mn-54 297 BqIL 61.5 60.34 44.24 - 78.44 A Ni-63 BqIL Pu-238 0.961 0.91 0.64-1.18 A Bq/L (1) A Pu-239/240 0.00965 0.00710 Bq/L 12.6 13.16 9.21- 17.11 A Sr-90 Bq/L Bq/L 22.5 23.38 16.37 - 30.39 A Tc-99 Bq/L 2.20 2.09 1.46-2.72 A U-234/233 Bq/L U-238 Bq/L 2.23 2.17 1.52-2.82 A Zn-65 219 228.16 159.71 -296.61 A 06-GrWI5 Water Gr-A Bq/L 0.575 0.581 >0.0 - 1.162 A Gr-B Bq/L 1.52 1.13 0.56-1.70 A 06-MaS15 Soil Am-241 Bq/kg 48.8 57.08 39.96 - 74.20 A Cs-134 Bq/kg 15.9 N (2)

Cs-1 37 Bq/kg 370 339.69 237.78 - 441.60 A Co-57 Bq/kg 667 656.29 459.40 - 853.18 A Co-60 Bq/kg 478 447.10 312.97 - 581.23 A Mn-54 Bq/kg 384 346.77 242.74 - 450.80 A Ni-63 Bq/kg 394 323.51 226.46 - 420.56 W K-40 Bq/kg 667 604 423-785 A Sr-90 Bq/kg 253 314.35 220.04 - 408.66 A Tc-99 Bq/kg 146 154.76 108.33 - 201.19 A Zn-65 Bq/kg 740 657.36 460.15 - 854.57 A 06-RdF15 AP Am-241 Bqlsample 0.0850 0.093 0.065- 0.121 A Cs-134 Bq/sample 2.34 2.934 2.054 - 3.814 A Cs-1 37 Bq/sample 2.45 2.531 1.772 - 3.290 A Co-57 Bq/sample 3.87 4.096 2.867 - 5.325 A Co-60 Bq/sample 2.12 2.186 1.530 - 2.842 A SMn-54 Bq/sample 0.0206 not spiked A Pu-238 Bq/sample 0.0766 0.067 0.047 - 0.087 A Pu-239/240 Bq/sample 0.00520 0.00041 (1) A Sr-90 Bq/sample 0.761 0.792 0.554 - 1.030 A U-234/233 Bqlsample 0.0217 0.020 0.014 - 0.026 A U-238 Bq/sample 0.0220 0.021 0.015 - 0.027 A Zn-65 Bq/sample 3.86 3.423 2.396 - 4.450 A 06-GrF15 AP Gr-A Bq/sample 0.257 0.361 >0.0 - 0.722 A Gr-B Bq/sample 0.398 0.481 0.241 - 0.722 A D-5 114 of 234

TABLE D-3 DOES MIXED ANALYTE PERFORMANCE EVALUATION PROGRAM (MAPEP)

TELEDYNE BROWN ENGINEERING, 2006 (PAGE 2 OF 3)

F---- 7ý -

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

January 2006 06-RdV15 Vegetation Am-241 Bq/sample 0.156 0.156 0.109 - 0.203 A Cs-1 34 Bq/sample 0.369 not spiked A Cs-1i37 Bq/sample 3.15 3.074 2.152 - 3.996 A Co-57 Bq/sample 10.1 8.578 6.005 - 11.151 A Co-60 Bq/sample 4.69 4.520 3.164 - 5.876 A Mn-54 Bq/sample 6.53 6.247 4.373 -8.121 A Pu-238 Bq/sample 0.183 0.137 0.096 - 0.178 N (3)

Pu-2391240 Bq/sample 0.111 0.164 0.115-0.213 N (3)

Sr-90 Bq/sample 2.22 1.561 1.093-2.029 N (3)

U-234/233 Bq/sample 0.208 0.208 0.146 - 0.270 A U-238 Bq/sample 0.176 0.216 0.151 -0.281 A Zn-65 Bq/sample 10.5 9.798 6.859 - 12.737 A July 2006 06-MaW16 Water Am-241 Bq/L 2.09 2.31 1.62- 3.00 A Cs-1 34 Bq/L 99.8 112.82 78.98 - 146.66 A Cs-1 37 Bq/L 191 196.14 137.30 - 254.98 A Co-57 Bq/L 203 213.08 149.16 - 277.00 A Co-60 Bq/L 46.2 47.5 33.2-61.8 A H-3 Bq/L 471 428.85 300.20 - 557.50 A Fe-55 Bq/L 173 165.4 115.8-215.0 A Ni-63 Bq/L 109 118.62 83.03- 154.21 A Pu-238 BqoL 1.50 1.39 0.97 - 1.81 A Pu-239/240 Bq/L 2.01 1.94 1.36-2.52 A Sr-90 Bq/L 13.7 15.69 10.98- 20.40 A Tc-99 Bq/L 29.0 27.15 19.00 - 35.29 A U-234/233 BqIL 2.19 2.15 1.50-2.80 A U-238 Bq/L 2.25 2.22 1.55-2.89 A Zn-65 Bq/L 178 176.37 123.46 - 229.28 A 06-GrW16 Water Gr-A Bq/L 1.52 1.033 >0.0 - 2.066 A Gr-B Bq/L 1.18 1.03 0.52-1.54 A 06-MaS16 Soil Am-241 Bq/kg 83.6 105.47 73.83- 137.11 W Cs-134 Bqlkg 393 452.13 316.49 - 587.77 A Cs-1 37 Bqlkg 522 525.73 368.01 - 683.45 A Co-57 Bq/kg 636 676.33 473.43 - 879.23 A Co-60 Bq/kg 3.78 1.98 A (4)

Mn-54 Bq/kg 598 594.25 415.98 - 772.52 A Ni-63 Bq/kg 571 627.3 470.6 - 874.0 A Pu-238 Bq/kg 71.2 82 57-107 A Pu-239240 Bq/kg 0.487 0.93 A (4)

K-40 Bq/kg 615 604 423 - 785 A Sr-90 Bq/kg 178 223.3 156.3 - 290.3 W Tc-99 Bq/kg 175 218.01 152.61 - 283.41 A U-234/233 Bq/kg 119 152.44 106.71 - 198.17 W U-238 Bq/kg 115 158.73 111.11 -206.35 W Zn-65 Bq/kg 937 903.61 632.53- 1174.69 A D-6 115 of 234

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

TELEDYNE BROWN ENGINEERING, 2006 (PAGE 3 OF 3)

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

July 2006 06-RdF16 AP Am-241 Bq/sample 0.124 0.142 0.099 - 0.185 A Cs-1 34 Bq/sample 2.62 3.147 2.203 - 4.091 A Cs-1 37 Bqlsample 1.98 1.805 1.263 - 2.346 A Co-57 Bq/sample 2.65 2.582 1.807 - 3.357 A Co-60 Bq/sample 1.63 1.577 1.104 - 2.050 A Mn-54 Bq/sample 2.10 1.92 1.34-2.50 A Pu-238 Bq/sample 0.118 0.118 0.083 - 0.153 A Pu-239/240 Bq/sample 0.00822 not spiked A Sr-90 Bq/sample 0.549 0.62 0.43-0.81 A U-2341233 Bq/sample 0.140 0.134 0.094 - 0.174 A U-238 Bq/sample 0.136 0.139 0.097 - 0.181 A Zn-65 Bq/sample -0.163 not spiked A 06-GrF16 AP Gr-A Bq/sample 0.134 0.290 >0.0 - 0.580 A Gr-B Bq/sample 0.358 0.359 0.180 - 0.538 A (1) False positive test (2) Evaluated as a false positive by MAPEP although we consideredthe result a non-detect due to the peak not being Identifiedby the gamma software. ForCs-134, MA PEPsuggests the Bi-214 Is not being differentiated from the Cs-134 peak.

(3) Sr samples analyzed hn triphlcateand one high result of 2.43 pCikg biasedthe submittedresults on the high side.

We were unable to determine the cause for the higherresult. Since we do not analyze vegetation for isotpic Pu, no NCR was initiated for the Pu failure. MAPEPsuggest pyrosulfate fusion preparationpriorto analysis for isotopic PuIn vegetation samples.

(4) Not detected, reporteda statisticallyzero result. (Falsepositive test)

(a) Teledyne Brown Engineeringreported result.

(b) The MAPEPknown value is equal to 100% of the parameterpresentin the standardas determined by gravimetricand/or volumetric measurementsmade during standardpreparation.

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

D-7 116 of 234

TABLE D-4 ERA1`) STATISTICAL

SUMMARY

PROFICIENCY TESTING PROGRAM ENVIRONMENTAL, INC., 2006 (Page 1 of 2)

Concentration (pCi/L)

Lab Code Date Analysis Laboratory ERA Control Resultb Resultc Limits Acceptance STW-1078 01/16/06 Sr-89 49.9

3.5 50.2 41.5 -58.9 Pass STW-1078 01116/06 Sr-90 31.5

1.5 30.7 22.0 - 39.4 Pass STW-1079 01/16/06 Ba-133 86.5

4.1 95.0 78.6 -111.0 Pass STW-1079 01116/06 Co-60 96.3 + 4.1 95.3 86.6 - 104.0 Pass STW-1079 01/16/06 Cs-134 22.6 + 3.0 23.1 14.4 -31.8 Pass STW-1079 01/16/06 Cs-137 109.0 + 5.9 111.0 101.0 -121.0 Pass STW-1079 01116/06 Zn-65 198.0 + 11.2 192.0 159.0 - 225.0 Pass STW-1080 01/16/06 Gr. Alpha 10.8 + 1.4 9.6 1.0 -18.3 Pass STW-1080 01/16/06 Gr. Beta 56.9 + 1.9 61.9 44.6 -79.2 Pass STW-1081 01/16/06 Ra-226 4.3 +/-0.4 4.6 3A - 5.8 Pass STW-1081 01/16/06 Ra-228 7.1 +1.8 6.6 3.7 -9.5 Pass STW-1081 01/16/06 Uranium 20.7 +0.5 22.1 16.9 -27.3 Pass STW-1088 04/10/06 Sr-89 29.0 + 1.8 32.4 23.7 -41.1 Pass STW-1088 04110/06 Sr-90 8.7

1.0 9.0 0.3 - 17.7 Pass STW-1089 04/10/06 Ba-133 10.3

0.4 10.0 1.3 -18.7 Pass STW-1089 04110/06 Co-60 114.0 +2.8 113.0 103.0 - 123.0 Pass STW-1089 04110/06 Cs-134 41.9

1.4 43.4 34.7-52.1 Pass STW-1089 04110/06 Cs-137 208.0

1.1 214.0 195.0 - 233.0 Pass STW-1089 04110/06 Zn-65 154.0 +/- 0.8 152.0 126.0 - 178.0 Pass STW-1090 04/10/06 Gr. Alpha 13.4

1.1 21.3 12.1 -30.5 Pass STW-1090 04110/06 Gr. Beta 27.7 +/- 2.1 23.0 14.3 -31.7 Pass STW-1091 04/10/06 1-131 22.0

0.3 19.1 13.9 -24.3 Pass STW-1092 04/10/06 H-3 7960.0 +/- 57.0 8130.0 6720.0 - 9540.0 Pass STW-1092 04/10/06 Ra-226 2.9 + 0.4 3.0 2.2 -3.8 Pass STW-1092 04/10/06 Ra-228 20.9 + 1.2 19.1 10.8 - 27.4 Pass STW-1092 04/10/06 Uranium 68.6 + 3.4 69.1 57.1 -81.1 Pass STW-1094 07/10/06 Sr-89 15.9 +/-0.7 19.7 11.0 -28.4 Pass STW-1094 07/10/06 Sr-90 24.3 +/- 0.4 25.9 17.2 -34.6 Pass STW-1095 07/10/06 Ba-133 94.9 +/- 8.9 88.1 72.9 - 103.0 Pass STW-1095 07/10/06 Co-60 104.0 +/- 1.8 99.7 91.0 -108.0 Pass STW-1095 07/10/06 Cs-134 48.7 +/- 1.3 54.1 45.4 - 62.8 Pass STW-1095 07/10/06 Cs-137 236.0 +/- 3.0 238.0 217.0 - 259.0 Pass STW-1095 07/10/06 Zn-65 126.0 + 8.0 121.0 100.0 - 142.0 Pass STW-1096 07/10/06 Gr. Alpha 10.9 + 1.0 10.0 1.3 -18.6 Pass STW-1096 07/10/06 Gr. Beta 9.7 +/- 0.4 8.9 0.2 - 17.5 Pass STW-1097 07/10/06 Ra-226 11.0 +/-0.5 10.7 7.9 - 13.5 Pass STW-1097 07/10106 Ra-228 12.2 +/- 0.8 10.7 6.1 - 15.3 Pass STW-1097 07/10/06 Uranium 43.4 +/- 0.1 40.3 33.3 - 47.3 Pass D-8 117 of 234

TABLE D-4 ERA'a) STATISTICAL

SUMMARY

PROFICIENCY TESTING PROGRAM ENVIRONMENTAL, INC., 2006 (Page 2 of 2)

Concentration (pCi/L)

Lab Code Date Analysis Laboratory ERA Control Resultb Result' Limits Acceptance STW-1 104 10/06/06 Sr-89 38.4

1.3 39.9 31.2 -45.7 Pass STW-1 104 10/06/06 Sr-90 15.5 +/- 0.5 16.0 7.3 -24.7 Pass STW-1 105 10/06/06 Ba-133 64.9 1 2.8 70.2 58.1 -82.3 Pass STW-1 105 10/06/06 Co-60 61.6

1.0 62.3 53.6 -71.0 Pass STW-1 105 10106/06 Cs-134 29.0

0.9 29.9 21.2 -38.6 Pass STW-1 105 10/06/06 Cs-137 77.8 1 2.4 78.2 69.5 - 86.9 Pass STW-1 105 10106106 Zn-65 293.0 1 2.4 277.0 229.0 - 325.0 Pass STW-1 106 10/06/06 Gr. Alpha 23.9 +/- 2.5 28.7 16.3 -41.1 Pass STW-1 106 10/06106 Gr. Beta 23.7 +/- 1.4 20.9 12.2 - 29.6 Pass STW-1107 d 10106106 1-131 28.4 +/- 1.2 22.1 16.9 -27.3 Fail STW-1 108 10/06/06 Ra-226 14.5 +/- 0.5 14.4 10.7 - 18.1 Pass STW-1 108 10106106 Ra-228 6.6 +/- 0.4 5.9 3.3 -8.4 Pass STW-1 108 10/06/06 Uranium 2.9 +/-0.1 3.2 0.0 -8.4 Pass STW-1 109 10/06/06 H-3 3000.0 +/- 142.0 3050.0 2430.0 - 3670.0 Pass a Results obtained by Environmental, Inc., Midwest Laboratory as a participant in the crosscheck program for proficiency testing in drinking water conducted by Environmental Resources Associates (ERA).

b Unless otherwise indicated, the laboratory result is given as the mean

standard deviation for three determinations.

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

d The reported result was an average of three analyses, results ranged from 25.36 to 29.23 pCi/L.

A fourth analysis was performed, result of analysis, 24.89 pCi/L.

D-9 118 of 234

TABLE D-5 DOE'S MIXED ANALYTE PERFORMANCE EVALUATION PROGRAM (MAPEPf ENVIRONMENTAL, INC., 2006 (Page lof 3)

Concentration b Known Control Lab Codec Date Analysis Laboratory result Activity Limits d Acceptance STVE-1082 01/01/06 Am-241 0.16 +/- 0.06 0.16 0.11 -0.20 Pass STVE-1082 01/01/06 Co-57 10.40 +/- 0.20 8.58 6.00 -11.15 Pass STVE-1082 01101/06 Co-60 5.00 +/- 0.20 4.52 3.16 -5.88 Pass STVE-1082 01/01/06 Cs-134 < 0.20 0.00 Pass STVE-1 082 01/01/06 Cs-137 3.40 +/- 0.20 3.07 2.15 -4.00 Pass STVE-1082 01/01/06 Mn-54 6.90 +/- 0.20 6.25 4.37 -8.12 Pass STVE-1082 01/01/06 Pu-238 0.08 +/- 0.03 0.14 0.10 -0.18 Fail STVE-1082 01/01/06 Pu-239/40 0.17 +/- 0.03 0.16 0.11 -0.21 Pass STVE-1082 01/01/06 Sr-90 1.40 +/- 0.20 1.56 1.09 -2.03 Pass STVE-1082 01/01/06 U-233/4 0.24 +/- 0.05 0.21 0.15 -0.27 Pass STVE-1082 01/01106 U-238 0.19 +/- 0.04 0.22 0.15 -0.28 Pass STVE-1082 01/01/06 Zn-65 11.10 *0.50 9.80 6.86 - 12.74 Pass STSO-1083 01/01/06 Am-241 54.60 +/- 5.50 57.08 39.96 - 74.20 Pass STSO-1083 01/01/06 Co-57 762.90 +/- 12.70 656.29 459.40 - 853.18 Pass STSO-1083 01/01/06 Co-60 504.90 +/- 3.10 447.10 312.97 - 581.23 Pass STSO-1083 01/01/06 Cs-134 < 1.70 0.00 Pass STSO-1083 01/01/06 Cs-137 406.50 +/- 3.70 339.69 237.78 - 441.60 Pass STSO-1083 01/01/06 K-40 719.20 +/- 18.40 604.00 422.80 - 785.20 Pass STSO-1083 01/01/06 Mn-54 415.60 +/- 4.80 346.77 242.74 - 450.80 Pass STSO-1083 01/01106 Ni-63 261.40 +/- 14.70 323.51 226.46 - 420.56 Pass STVE-1083t 01/01/06 Pu-238 14.60 +/- 2.90 61.15 42.81 - 79.50 Fail STVE-1083 01/01/06 Pu-239/40 14.60 +/- 2.40 45.85 32.09 - 59.61 Fail STVE-1 083' 01/01/06 U-233/4 13.50 +/- 1.70 37.00 25.90 -48.10 Fail STVE-1083 01/01/06 U-238 15.40 +/- 1.80 38.85 27.20 - 50.50 Fail STSO-1083 01/01106 Zn-65 783.40 +/- 7.00 657.36 460.15 - 854.57 Pass STAP-1084 01/01/06 Gr. Alpha 0.26 +/- 0.02 0.36 0.00 - 0.72 Pass STAP-1084 01/01/06 Gr. Beta 0.51 +/- 0.03 0.48 0.24 -0.72 Pass STAP-1085 01/01/06 Am-241 0.12 +/- 0.02 0.09 0.07 -0.12 Pass STAP-1085 01/01/06 Co-57 4.32 +/- 0.10 4.10 2.87 - 5.32 Pass STAP-1085 01/01/06 Co-60 2.24 +/- 0.16 2.19 1.53-2.84 Pass STAP-1085 01/01/06 Cs-134 2.96 +/-0.19 2.93 2.05 - 3.81 Pass STAP-1085 01/01/06 Cs-137 2.64 +/- 0.20 2.53 1.77 -3.29 Pass STAP-1085 011/01/06 Pu-238 0.03 +/- 0.01 0.07 0.05 - 0.09 Fail STAP-1085 01/01/06 Pu-239/40 < 0.01 0.00 Pass STAP-1085 01/01/06 Sr-90 0.77 +/- 0.21 0.79 0.55-1.03 Pass STAP-1085 01/01/06 U-233/4 0.03 +/- 0.01 0.02 0.01 -0.03 Pass STAP-1085 01/01/06 U-238 0.02 +/- 0.01 0.02 0.01 -0.03 Pass STAP-1085 01/01/06 Zn-65 3.94 +/- 0.44 3.42 2.40 -4.45 Pass D- 10 119 of 234

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

ENVIRONMENTAL, INC., 2006 (Page 2 of 3)

Concentration b Known Control Lab Codec Date Analysis Laboratory result Activity Limits d Acceptance STW-1086 01/01/06 Am-241 1.29 + 0.05 1.30 0.91 -1.69 Pass STW-1086 01101/06 Co-57 177.10 +/- 1.00 166.12 116.28 -215.96 Pass STW-1086 01/01/06 Co-60 158.30 + 1.00 153.50 107.45 - 199.55 Pass STW-1086 01/01/06 Cs-134 96.40 + 1.50 95.10 66.57 - 123.63 Pass STW-1086 < 0.80 0.00 Pass a 01/01/06 Cs-137 ST1W-1086 01/01106 Fe-55 102.50 +/- 18.10 129.60 90.72 - 168.48 Pass STW-1086 01/01/06 H-3 956.60 +/- 16.50 952.01 666.41 - 1238.00 Pass STW-1086 01/01/06 Mn-54 335.30 +/- 2.20 315.00 220.50 - 409.50 Pass STW-1086 01/01/06 Ni-63 62.90

3.60 60.34 42.24 - 78.44 Pass STW-1086 01/01/06 Pu-238 0.96 +/- 0.07 0.91 0.70 - 1.30 Pass STW-1086 6 01101/06 Pu-239/40 < 0.20 0.00 Pass STW-1086 01/01/06 Sr-90 12.80 +/-1.60 13.16 9.21 -17.11 Pass STW-1086 01101/06 Tc-99 22.30 +/- 1.20 23.38 16.37 - 30.39 Pass STW-1086 01101/06 U-233/4 2.02 +/- 0.12 2.09 1.46 - 2.72 Pass STW-1086 01/01/06 U-238 2.03 +/- 0.12 2.17 1.52 -2.82 Pass STW-1086 01/01/06 Zn-65 249.50 +/- 3.40 228.16 159.71 - 296.61 Pass STW-1087 01/01/06 Gr. Alpha 0.59 +/- 0.10 0.58 0.00-1.16 Pass STW-1087 01/01/06 Gr. Beta 1.69 +/- 0.07 1.13 0.56 -1.70 Pass STVE-1 098 07/01/06 Co-57 <0.14 0.00 Pass STVE-1 098 g 07/01/06 Co-60 6.89 +/- 0.17 5.81 4.06-7.55 Pass STVE-1098 07/01/06 Cs-134 8A6 +/- 0.16 7.49 5.24 - 9.73 Pass STVE-1098 07/01/06 Cs-137 6.87 +/- 0.29 5.50 3.85 -7.14 Pass STVE-1098 07/01/06 Mn-54 10.36 +/- 0.29 8.35 5.85 - 10.86 Pass STVE-1098 07/01/06 Zn-65 7.46 +/- 0.50 5.98 4.19 -7.78 Pass STSO-1099 07/01/06 Am-241 130.00 +/- 11.60 105.47 73.83 - 137.11 Pass STSO-1099 07/01/06 Co-57 784.90 +/- 3.80 676.33 473.43 - 879.23 Pass STSO-1099 07/01/06 Co-60 2.10 +/- 0.90 1.98 0.00-5.00 Pass STSO-1099 07/01/06 Cs-134 500.70 +/- 7.40 452.13 316.49 - 587.77 Pass STSO-1099 07/01/06 Cs-137 624.20 +/- 4.90 525.73 368.01 - 683.45 Pass STSO-1099 07/01/06 K-40 701.30 +/- 3.40 604.00 423.00 - 785.00 Pass STSO-1099 07/01/06 Mn-54 699.20 +/- 5.20 594.25 415.98 - 772.52 Pass STSO-1099 07/01/06 Ni-63 614.40 + 17.10 672.30 470.60 - 874.00 Pass STSO-1099 07/01/06 Pu-238 79.90 + 5.80 82.00 57.00 - 107.00 Pass STSO-10996 07/01/06 Pu-239/40 < 0.70 0.00 Pass STSO-1099 07/01/06 U-233/4 150.50 +/- 5.90 152.44 106.71 - 198.17 Pass STSO-1099 07/01/06 U-238 151.60 +/- 6.00 158.73 111.11 - 206.35 Pass STSO-1099 07/01/06 Zn-65 1021.90 +/- 9.20 903.61 632.53 - 1175.00 Pass D-11 120 of 234

TABLE D-5 DOE'S MIXED ANALYTE PERFORMANCE EVALUATION PROGRAM (MAPEPT ENVIRONMENTAL, INC., 2006 (Page 3 of 3)

Concentration b Known Control Lab Code0 Date Analysis Laboratory result Activity Limits d Acceptance STAP-1 100 07/01/06 Am-241 0.16 +/- 0.03 0.14 0.10 -0.19 Pass STAP-1100 07/01106 Co-57 2.17 +/-0.06 2.58 1.81 - 3.36 Pass STAP-1 100 07/01/06 Co-60 1.38 +/- 0.07 1.58 1.10 -2.05 Pass STAP-1 100 07101/06 Cs-134 2.52 + 0.13 3.15 2.20 -4.09 Pass STAP-1 100 07101/06 Cs-137 1.64 +/-0.08 1.81 1.26 -2.35 Pass STAP-1 100 07/01/06 Mn-54 1.76 +/-0.18 1.92 1.34 -2.50 Pass STAP-1 100 07/01/06 Pu-238 0.09 + 0.02 0.12 0.08 -0.15 Pass STAP-1100 07/01/06 Sr-90 0.66 +/- 0.21 0.62 0.43 -0.81 Pass STAP-1 100 07101/06 U-233/4 0.15 + 0.02 0.13 0.09 -0.17 Pass STAP-1100 07/01/06 U-238 0.13 +/-0.02 0.14 0.10 -0.18 Pass STAP-1100* 07/01/06 Zn-65 < 0.07 0.00 Pass STAP-1 101 07/01/06 Gr. Alpha 0.08 +/- 0.03 0.29 0.00 - 0.58 Pass STAP-1101 07101/06 Gr. Beta 0.41 +/- 0.05 0.36 0.18 -0.54 Pass STW-1 102 07/01/06 Gr. Alpha 0.76 + 0.07 1.03 0.00 - 2.07 Pass STW-1 102 07/01/06 Gr. Beta 1.23 + 0.06 1.03 0.52 -1.54 Pass STW-1 103 07/01/06 Am-241 1.86 + 0.09 2.31 1.62 -3.00 Pass STW-1 103 07/01/06 Co-57 224.10 + 1.20 213.08 149.16 -277.00 Pass STW-1 103 07/01/06 Co-60 49.40 +/- 0.50 47.50 33.20 -61.80 Pass STW-1 103 07/01/06 Cs-134 112.70 +/- 0.90 112.82 78.97 - 146.66 Pass STW-1 103 07/01/06 Cs-137 206.60 +/- 1.40 196.14 137.30 - 254.98 Pass STW-1 103 07/01/06 Fe-55 138.40 +/- 5.40 165.40 115.80 - 215.00 Pass STW-1 103 07/01/06 H-3 446.50 +/- 11.80 428.85 300.20 - 557.50 Pass STW-1 103 07/01/06 Mn-54 < 0.30 0.00 Pass STW-1 103 07/01/06 Ni-63 116.70 +/- 3.60 118.62 83.03 - 154.21 Pass STW-1 103 07/01/06 Pu-238 1.27 +/- 0.07 1.39 0.97 -1.81 Pass STW-1 103 07/01/06 Pu-239/40 1.67 +/- 0.08 1.94 1.36 -2.52 Pass STW-1 103 07/01/06 Sr-90 16.40 +/- 1.90 15.69 10.98 -20.40 Pass STW-1 103 07/01/06 Tc-99 29.40 +/- 1.10 27.15 19.00 - 35.29 Pass STW-1 103 07/01/06 U-233/4 1.97 +/- 0.08 2.15 1.50 -2.80 Pass STW-1 103 07/01/06 U-238 1.97 +/- 0.08 2.22 1,55 -2.89 Pass STW-1 103 07/01/06 Zn-65 192.50 + 2.40 176.37 123.46 - 229.28 Pass 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, I determination) and control limits as defined by the MAPEP.

Included in the MAPEP as a false positive.

f Difficulties with the analyses for transuranics isotopes in solid samples (Filters, Soil and vegetation),

were attributed to incomplete dissolution of the samples. Soil samples were repeated, results of reanalyses:

Pu-238, 53.1

5.3 bq/kg. Pu-239/240, 42.4

4.7 bq/kg. U-233/4, 33.3

3.5 bq/kg. U-238, 35.5 +/- 3.6 bqlkg.

9 The July vegetation sample was provided in two separate geometries, (100 ml. and 500 ml.). Results reported here used the 500 ml. standard size geometry. Results for the 100 ml. geometry showed approximately a 15% higher bias.

D - 12 121 of 234

APPENDIX E EFFLUENT DATA 122 of 234

TABLE OF CONTENTS INTRO DUCTIO N .................................................................................................................... 1 SUM MARY ............................................................................................................................. 2 1.0. EFFLUENTS .................................................................................................. 3 1.1. G aseous Effluents to the Atm osphere ............................................... 3 1.2. Liquids Released to Illinois River ....................................................... 3 2.0. SO LID RADIOACTIVE W ASTE ..................................................................... 3 3.0. DO SE TO MAN .............................................................................................. 3 3.1. G aseous Effluent Pathways .............................................................. 3 3.1.1. Noble Gases ........................................................................ 3 3.1.1.1. Gam m a 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 Pathw ays ..................................................................... 5 3.3. Assessment of Dose to Member of Public .......................................... 5 4.0. SITE METEO RO LO GY ................................................................................. 6 i

123 of 234

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 124 of 234

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

Liquid effluents from LaSalle County Station are released to the Illinois River in controlled batches after radioassay of each batch. Gaseous effluents are released to the atmosphere after delay to permit decay of short-lived (noble) gases. Releases to the atmosphere are calculated on the basis of analyses of routine grab samples of noble gases as well as continuously collected composite samples of iodine and particulate radioactivity sampled during the course of the year. The results of effluent analyses are summarized on a monthly basis and reported to the Nuclear Regulatory Commission as required per Technical Specifications. Airborne concentrations of noble gases, 1-131, and particulate radioactivity in offsite areas are calculated using effluent and meteorological data.

Environmental monitoring is conducted by sampling at indicator and control (background) locations in the vicinity of LaSalle County Station to measure changes in radiation or radioactivity levels that may be attributable to station operations. If significant changes attributable to LaSalle County Station are measured, these changes are correlated with effluent releases. External gamma radiation exposure from noble gases and intemal 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.

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SUMMAAR~

Gaseous and liquid effluents for the period contributed to only a small fraction of the LaSalle County Station Technical Specification limits. Calculations of environmental concentrations based on effluent, Illinois River flow, and meteorological data for the period indicate that consumption by the public of radionuclides attributable to LaSalle County Station does not exceed regulatory limits. Radiation exposure from radionuclides releases to the atmosphere represented the critical pathway for the period with a maximum individual total dose estimated to be 1.60E-02 mrem for the year, where a shielding and occupancy factor of 0.7 is assumed. The assessment of radiation doses is performed in accordance with the Offsite Dose Calculation Manual (ODCM),

specifically, a comparison of preoperational studies with operational controls or with previous environmental surveillance reports and an assessment of the observed impacts of the plant operation on the environment. Control locations are basis for "preoperational data." Yeariy data comparisons are provided in Sections 5.1 and 5.2; five-year graphical trend data is provided in Appendix III, Section 7.0. The results of analysis confirm that the station is operating in compliance with 10CFR50 Appendix I, 10CFR20 and 40CFR190.

2 126 of 234

1.0 EFFLUENTS 1.1 Gaseous Fffluents to the Atmosphere Measured concentrations of noble gases, radiolodine, and particulate radioactivity released to the atmosphere during the year, are listed in Table 1.1-1. A total of 2.93E+03 curies of fission and activation gases were released with a maximum quarterly average release rate of 1.63E+02 pCi/sec.

A total of 4.43E-02 curies of 1-131 was released during the year with a maximum quarterly release rate of 2.68E-03 pCi/sec.

A total of 5.84E-03 curies of beta-gamma emitters was released as airborne particulate matter with a maximum quarterly average release rate of 1.55E-03 pCi/sec. Alpha-emitting radionuclides were below the lower limit of detection (LLD).

A total of 8.65E+01 curies of tritium was released with a maximum quarterly average release rate of 3.60E+00 pCi/sec.

1.2 Liquids Released to Illinois River There were no liquid batch releases in 2006. Continuous release path activity was below applicable Lower Limits of Detection.

2.0 SOLID RADIOACTIVE WASTE Solid radioactive wastes were shipped by truck to the Envirocare Disposal Facility or to a waste processor. For further detail, refer the LaSalle 2005 Radioactive Effluent Release Report. The submittal date of this report was April 30, 2007.

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

3.1.1 hkohle _Gase~s 3.1.1.1 Gamma Dose Rates Unit I and Unit 2 gaseous releases at LaSalle 3

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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 4.66E-02 mrem (Table 3.1-1) for the year, with an occupancy or shielding factor of 0.7 included. The maximum total body dose based on measured effluents and concurrent meteorological data would be 1.60E-02 mrem. (Table 3.4-1).

The maximum gamma air dose was 6.16E-02 mrad (Table 3.1-1) and 3.93E-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 "infiniten for purpose of calculating the dose from beta radiation incident on the skin.

However, the actual dose to sensitive skin tissues is difficult to calculate due to the effect of the beta particle energies, thickness of inert skin and clothing covering sensitive tissues. For purposes of this report the skin is taken to have a thickness of 7.0 mg/cm 2 and an occupancy factor of 1.0 is used. The skin dose from beta and gamma radiation for the year was 4.90E-02 (Table 3.1-1) and 1.90E-02 mrem (Table 3.4-1) based on concurrent meteorological data. The maximum offsite beta dose for the year was 2.03E-03 mrad (Table 3.1-1) and 4.38E-03 mrad (Table 3.4-1) based on concurrent meteorological data.

4 128 of 234

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 Thyrid 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 6.03E-02 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 O.OOE+00 for the year mrem (Table 3.2-1).

3.3 Assessment of 1lose to Member of Puhlic During the period January to December, 2006, 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

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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 99.6% during 2006 (Table 3.4-1).

Nuclear Regulatory Commission, Regulatory Guide 1.109 (Rev. 1) 6 130 of 234

APPENDIX E-1 DATA TABLES AND FIGURES E-1.1 131 of 234

Table 1.1-1 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2006)

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

UnI I 1st Qtr I 2nd Qtr 3rd Qtr I 4th Qtr ITotal Error %

A. Fission and Activation Gas Releases I. Total Release Activity Ci 1.27E+03 7.48E+02 4.70E+02 4.35E+02 3.50E+O1

3. Percent of Technical Specification % * * *

Limit B. Iodine Releases

1. Total 1-131 Activity Ci 2.08E-02 7.35E-03 8.14E-03 8.OOE-03 3.50E+01

2. Average Release Rate uCi/sec 2.68E-03 9.36E-04 1.02E-03 1.01E-03

3. Percent of Technical Specification % * * *

Limit C. Particulate (> 8 day half-life) Releases

1. Gross Activity Ci 1.55E-03 1.22E-03 1.82E-03 1.25E-03 3.30E+01

2. Average Release Rate uCi/sec 1.99E-04 1.55E-03 2.29E-04 1.57E-04

3. Percent of Technical Specification % * * *

Limit

3. Gross Alpha Activity Ci <1.OOE-I1 <1.OOE-I1 <1.OOE-11 <1.OOE-11 D. Tritium Releases

1. Total Release Activity Ci 2.01 E+01 1.76E+01 2.02E+01 2.86E+01 2.10E+01

2. Average Release Rate uCi/sec 2.59E+00 2.24E+00 2.55E+00 3.60E+00

3. Percent of Technical Specification % * * *

Limit

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

"<" Indicates activity of sample is less than LLD given in uCi/ml E - 1.2 132 of 234

Table 1.2-1 LASALLE COUNTY NUCLEAR POWER STATION EFFLUENT AND WASTE DISPOSAL ANNUAL REPORT (2006)

LIQUID RELEASES UNIT 1 and UNIT 2 SUMMATION OF ALL LIQUID RELEASES Estimated I Units I lstQtr I 2ndQtr I 3rd Qtr I 4th Qtr Total Error %

A. Fission and Activation Products

1. Total Activity Released Ci <LLD <LLD <LLD <LLD N/A

2. Average Concentration Released uCi/mI <LLD <LLD <LLD <LLD

3. Percent of Applicable Limit % * * *

B. Tritium

1. Total Activity Released Ci <LLD <LLD <LLD <LLD N/A

2. Average Concentration Released uCi/ml <LLD <LLD <LLD <LLD J

3. Percent of Applicable Limit % * * *

C. Dissolved Noble Gases

1. Total Activity Released Ci <LLD <LLD <LLD <LLD N/A I

2. Average Concentration Released uCi/ml <LLD <LLD <LLD <LLD

3. Percent of Applicable Limit %* * *

D. Gross Alpha

1. Total Activity Released (estimate) Ci <LLD <LLD <LLD <LLD N/A

2. Average Concentration Released uCi/ml <LLD <LLD <LLD <LLD

3. Percent of Applicable Limit % * * *

E. Volume of Liquid Waste to Discharge liters 0.00E+00 0.00E+00 0.OOE+00 0.00E+00 N/A IF. Volume of Dilution Water liters 0.OOE+00O0.OOE+O0 0.OOE+O0 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 - 1.3 133 of 234

Table 2.0-1 SOLID RADWASTE ANNUAL REPORT LaSalle County Station Table 2.0-1 had been deliberately deleted. For solid waste disposal detail, refer to the LaSalle County Station 2006 Effluent Report.

H- 1.4 134 of 234

Table 3.1-1 LASALLE STATION UNIT ONE ACTUAL 2006 MAXIMUM DOSES RESULTING FROM AIRBORNE RELEASES PERIOD OF RELEASE - 01/01/06 TO 12/31/06 CALCULATED 04/09/07 INFANT RECEPTOR 1ST 2ND 3RD 4TH TYPE QUARTER QUARTER QUARTER QUARTER ANNUAL JAN-MAR APR-JUN JUL-SEP OCT-DEC GAMMA AIR 2.63E-02 1.48E-02 1.31E-02 7.42E-03 6.16E-02 (MRAD) (WSW) (WSW) (WSW) (WSW) (WSW)

BETA AIR 9.56E-04 4.56E-04 4.OOE-04 2.22E-04 2.03E-03 (MRAD) (ESE) (ESE) (ESE) (ESE) (ESE)

TOT. BODY 1.99E-02 1.12E-02 9.90E-03 5.61E-03 4. 66E-02 (MREM) (WSW) (WSW) (WSW ) (WSW) (WSW)

SKIN 2.10E-02 1.17E-02 1.04E-02 5.88E-03 4.90E-02 (MREM) (WSW) (WSW) (WSW) (WSW) (WSW)

ORGAN 2. 07E-03 1.35E-02 2.16E-02 8.77E-03 4.59E-02 (MREM) (ESE) (ESE) (ESE) (ESE) (ESE)

THYROID THYROID THYROID THYROID THYROID THIS IS A REPORT FOR THE CALENDAR YEAR 2006 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 0.53 0.30 0.26 0.15 10.0 0.62 BETA AIR (MRAD) 10.0 0.01 0.00 0.00 0.00 20.0 0.01 TOT. BODY (MREM) 2.5 0.80 0.45 0.40 0.22 5.0 0.93 SKIN (MREM) 7.5 0.28 0.16 0.14 0.08 15.0 0.33 ORGAN (MREM) 7.5 0.03 0.18 0.29 0.12 15.0 0.31 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- 1.5 135 of 234

Table 3.1-1 (continued)

LASALLE STATION UNIT ONE ACTUAL 2006 MAXIMUM DOSES RESULTING FROM AIRBORNE RELEASES PERIOD OF RELEASE - 01/01/06 TO 12/31/06 CALCULATED 04/09/07 CHILD RECEPTOR 1ST 2ND 3RD 4TH TYPE QUARTER QUARTER QUARTER QUARTER ANNUAL JAN-MAR APR-JUN JUL-SEP OCT-DEC GAMMA AIR 2.63E-02 1.48E-02 1.31E-02 7.42E-03 6.16E-02 (MRAD) (WSW) (WSW) (WSW) (WSW) (WSW)

BETA AIR 9.56E-04 4.56E-04 4.0OE-04 2.22E-04 2.03E-03 (MRAD) (ESE) (ESE) (ESE) (ESE) (ESE)

TOT. BODY 1.99E-02 1.12E-02 9.90E-03 5.61E-03 4. 66E-02 (MREM) (WSW) (WSW) (WSW) (WSW) (WSW)

SKIN 2.10E-02 1.17E-02 1.04E-02 5.88E-03 4. 90E-02 (MREM) (WSW) (WSW) (WSW) (WSW) (WSW)

ORGAN 1.72E-03 1.82E-02 2.90E-02 1.13E-02 6.03E-02 (MREM) (NNE) (NNE) (NNE) (NNE) (NNE)

THYROID THYROID THYROID THYROID THYROID THIS IS A REPORT FOR THE CALENDAR YEAR 2006 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 0.53 0.30 0.26 0.15 10.0 0.62 BETA AIR (MRAD) 10.0 0.01 0.00 0.00 0.00 20.0 0.01 TOT. BODY (MREM) 2.5 0.80 0.45 0.40 0.22 5.0 0.93 SKIN (MREM) 7.5 0.28 0.16 0.14 0.08 15.0 0.33 ORGAN (MREM) 7.5 0.02 0.24 0.39 0.15 15.0 0.40 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 - 1.6 136 of 234

Table 3.1-1 (continued)

LASALLE STATION UNIT ONE ACTUAL 2006 MAXIMUM DOSES RESULTING FROM AIRBORNE RELEASES PERIOD OF RELEASE - 01/01/06 TO 12/31/06 CALCULATED 04/09/07 TEENAGER RECEPTOR 1ST 2ND 3RD 4TH TYPE QUARTER QUARTER QUARTER QUARTER ANNUAL JAN-MAR APR-JUN JUL-SEP OCT-DEC GAMMA AIR 2. 63E-02 1.48E-02 1.31E-02 7.42E-03 6.16E-02 (MRAD) (WSW) (WSW) (WSW) (WSW) (WSW)

BETA AIR 9.56E-04 4.56E-04 4.OOE-04 2.22E-04 2.03E-03 (MRAD) (ESE) (ESE) (ESE) (ESE) (ESE)

TOT. BODY 1. 99E-02 1.12E-02 9.90E-03 5.61E-03 4. 66E-02 (MREM) (WSW) (WSW) (WSW ) (WSW) (WSW)

SKIN 2.10E-02 1.17E-02 1.04E-02 5.88E-03 4. 90E-02 (MREM) (WSW) (WSW) (WSW) (WSW) (WSW)

ORGAN 1.27E-03 1.14E-02 1.80E-02 7.21E-03 3.80E-02 (MREM) (NNE) (NNE) (NNE) (NNE) (NNE)

THYROID THYROID THYROID THYROID THYROID THIS IS A REPORT FOR THE CALENDAR YEAR 2006 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 0.53 0.30 0.26 0.15 10.0 0.62 BETA AIR (MRAD) 10.0 0.01 0.00 0.00 0.00 20.0 0.01 TOT. BODY (MREM) 2.5 0.80 0.45 0.40 0.22 5.0 0.93 SKIN (MREM) 7.5 0.28 0.16 0.14 0.08 15.0 0.33 ORGAN (MREM) 7.5 0.02 0.15 0.24 0.10 15.0 0.25 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 - 1.7 137 of 234

Table 3.1-1 (continued)

LASALLE STATION UNIT ONE ACTUAL 2006 MAXIMUM DOSES RESULTING FROM AIRBORNE RELEASES PERIOD OF RELEASE - 01/01/06 TO 12/31/06 CALCULATED 04/09/07 ADULT RECEPTOR 1ST 2ND 3RD 4TH TYPE QUARTER QUARTER QUARTER QUARTER ANNUAL JAN-MAR APR-JUN JUL-SEP OCT-DEC GAMMA AIR 2. 63E-02 1.48E-02 1.31E-02 7.42E-03 6.16E-02 (MRAD) (WSW) (WSW) (WSW) (WSW) (WSW)

BETA AIR 9.56E-04 4.56E-04 4.OOE-04 2.22E-04 2.03E-03 (MRAD) (ESE) (ESE) (ESE) (ESE) (ESE)

TOT. BODY 1.99E-02 1.12E-02 9.90E-03 5.61E-03 4.66E-02 (MREM) (WSW) (WSW) (WSW) (WSW) (WSW)

SKIN 2.10E-02 1.17E-02 1.04E-02 5.88E-03 4. 90E-02 (MREM) (WSW) (WSW) (WSW) (WSW) (WSW1)

ORGAN 1.40E-03 1.14E-02 1.81E-02 7.32E-03 3.82E-02 (MREM) (NNE) (NNE) (NNE) (NNE) (NNE)

THYROID THYROID THYROID THYROID THYROID THIS IS A REPORT FOR THE CALENDAR YEAR 2006 COMPLIANCE STATUS - 10CFR 50 APP. I ADULT RECEPTOR

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

QTRLY IST 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 0.53 0.30 0.26 0.15 10.0 0.62 BETA AIR (MRAD) 10.0 0.01 0.00 0.00 0.00 20.0 0.01 TOT. BODY (MREM) 2.5 0.80 0.45 0.40 0.22 5.0 0.93 SKIN (MREM) 7.5 0.28 0.16 0.14 0.08 15.0 0.33 ORGAN (MREM) 7.5 0.02 0.15 0.24 0.10 15.0 0.25 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 - 1.8 138 of 234

Table 3.2-1 LASALLE STATION UNIT ONE ACTUAL 2006 MAXIMUM DOSES (MREM) RESULTING FROM AQUATIC EFFLUENTS PERIOD OF RELEASE - 01/01/06 TO 12/31/06 CALCULATED 04/13/07 INFANT RECEPTOR 1ST 2ND 3RD 4TH DOSE TYPE QUARTER QUARTER QUARTER QUARTER ANNUAL JAN-MAR APR-JUN JUL-SEP OCT-DEC TOTAL 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 BODY INTERNAL 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 ORGAN THIS IS A REPORT FOR THE CALENDAR YEAR 2006 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 3.0 0.00 CRIT. ORGAN(MREM) 5.0 0.00 0.00 0.00 0.00 10.0 0.00 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- 1.9 139 of 234

Table 3.2-1 (continued)

LASALLE STATION UNIT ONE ACTUAL 2006 MAXIMUM DOSES (MREM) RESULTING FROM AQUATIC EFFLUENTS PERIOD OF RELEASE - 01/01/06 TO 12/31/06 CALCULATED 04/13/07 CHILD RECEPTOR 1ST 2ND 3RD 4TH DOSE TYPE QUARTER QUARTER QUARTER QUARTER ANNUAL JAN-MAR APR-JUN JUL-SEP OCT-DEC TOTAL 0.00E+00 0.OOE+00 0.OOE+00 0.00E+00 0.OOE+00 BODY INTERNAL 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 ORGAN THIS IS A REPORT FOR THE CALENDAR YEAR 2006 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 3.0 0.00 CRIT. ORGAN(MREM) 5.0 0.00 0.00 0.00 0.00 10.0 0.00 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- 1.10 140 of 234

Table 3.2-1 (continued)

LASALLE STATION UNIT ONE ACTUAL 2006 MAXIMUM DOSES (MREM) RESULTING FROM AQUATIC EFFLUENTS PERIOD OF RELEASE - 01/01/06 TO 12/31/06 CALCULATED 04/13/07 TEENAGER RECEPTOR 1ST 2ND 3RD 4TH DOSE TYPE QUARTER QUARTER QUARTER QUARTER ANNUAL JAN-MAR APR-JUN JUL-SEP OCT-DEC TOTAL 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 BODY INTERNAL 0.OOE+00 0.OOE+00 0.00E+00 0.OOE+00 0.OOE+00 ORGAN THIS IS A REPORT FOR THE CALENDAR YEAR 2006 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 3.0 0.00 CRIT. ORGAN(MREM) 5.0 0.00 0.00 0.00 0.00 10.0 0.00 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- 1.11 141 of 234

Table 3.2-1 (continued)

LASALLE STATION UNIT ONE ACTUAL 2006 MAXIMUM DOSES (MREM) RESULTING FROM AQUATIC EFFLUENTS PERIOD OF RELEASE - 01/01/06 TO 12/31/06 CALCULATED 04/13/07 ADULT RECEPTOR 1ST 2ND 3RD 4TH DOSE TYPE QUARTER QUARTER QUARTER QUARTER ANNUAL JAN-MAR APR-JUN JUL-SEP OCT-DEC TOTAL 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 BODY INTERNAL 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 0.OOE+00 ORGAN THIS IS A REPORT FOR THE CALENDAR YEAR 2006 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 3.0 0.00 CRIT. ORGAN(MREM) 5.0 0.00 0.00 0.00 0.00 10.0 0.00 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 - 1.12 142 of 234

Table 3.3-1 LASALLE STATION UNIT ONE 10 CFR 20 COMPLIANCE ASSESSMENT PERIOD OF ASSESSMENT 01/01/06 TO 12/31/06 CALCULATED 04/09/07

1. 10 CFR 20.1301 (a) (1) Compliance Total Effective Dose Equivalent, mrem/yr 3.50E-01 10 CFR 20.1301 (a) (1) limit mrem/yr 100.0

% of limit 0.35 Compliance Summary - 10CFR20 ist 2nd 3rd 4th % of Qtr Qtr Qtr Qtr Limit TEDE 8.17E-02 1.01E-01 1.01E-01 6.70E-02 0.35 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 - 1.13 143 of 234

Table 3.3-1 (continued)

LASALLE STATION UNIT ONE 10 CFR 20 COMPLIANCE ASSESSMENT PERIOD OF ASSESSMENT 01/01/06 TO 12/31/06 CALCULATED 04/09/07

2. 10 CFR 20.1301 (d)/40 CFR 190 Compliance Dose Limit % of (mrem) (mrem) Limit Whole Body Plume 4. 66E-02 (DDE) Skyshi ne 2.94E-01 Ground 3.81E-04 Total 3.41E-01 25.0 1.36 Organ Dose Thyroi [d 3.12E-02 75.0 0.04 (CDE) Gonads 9.01E-03 25.0 0.04 Breast 9.OOE-03 25.0 0.04 Lung 9.01E-03 25.0 0.04 Marrow 9.01E-03 25.0 0.04 Bone 9.OOE-03 25.0 0.04 Remain der 9.03E-03 25.0 0.04 CEDE 9.68E-03 TEDE 3.50E-01 100.0 0.35 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 - 1.14 144 of 234

Table 3.3-1 (continued)

LASALLE STATION UNIT TWO 10 CFR 20 COMPLIANCE ASSESSMENT PERIOD OF ASSESSMENT 01/01/06 TO 12/31/06 CALCULATED 04/09/07

1. 10 CFR 20.1301 (a) (1) Compliance Total Effective Dose Equivalent, mrem/yr 3I.25E-01 10 CFR 20.1301 (a) (1) limit mrem/yr 100.0

% of limit 0.32 Compliance Summary - 10CFR20 ist 2nd 3rd 4th % of Qtr Qtr Qtr Qtr L:imit TEDE 8.80E-02 8.86E-02 8.85E-02 5.98E-02 0.3:2 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 - 1.15 145 of 234

Table 3.3-1 (continued)

LASALLE STATION UNIT TWO 10 CFR 20 COMPLIANCE ASSESSMENT PERIOD OF ASSESSMENT 01/01/06 TO 12/31/06 CALCULATED 04/09/07

2. 10 CFR 20.1301 (d)/40 CFR 190 Compliance Dose Limit % of (mrem) (mrem) Limit Whole Body Plume 0.OOE+00 (DDE) Skyshiine 3.25E-01 Groun i 0.OOE+00 Total 3.25E-01 25.0 1.30 Organ Dose Thyro:id 0.00E+00 75.0 0.00 (CDE) Gonads 0.OOE+00 25.0 0.00 Breast t 0.00E+00 25.0 0.00 Lung 0.OOE+00 25.0 0.00 Marroi 0.OOE+00 25.0 0.00 Bone 0.OOE+00 25.0 0.00 Remainider 0.OOE+00 25.0 0.00 CEDE 0.0GE+00 TEDE 3.25E-01 100.0 0.32 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 - 1.16 146 of 234

Table 3.4-1 LaSalle Station - Unit 1 MAXIMUM DOSES RESULTING FROM AIRBORNE RELEASES 2006 TYPE OF DOSE FIRST QUARTER SECOND QUARTER THIRD QUARTER FOURTH QUARTER ANNUAL GAMMA AIR (mrad) 1.790E-02( SE) 1.570E-02( SW) 7.500E-03(WSW) 4.405E-03( N ) 3.933E-02( SW)

BETA AIR (mrad) 2.755E-03( SE) 1.315E-03( SW) 6.650E-04( NE) 3.740E-04( NE) 4.380E-03( SE)

WHOLE BODY (mrem) 7.350E-03(SSW) 5. 700E-03 (SSW) 2.085E-03( W ) 1.310E-03(ESE) 1.596E-02(SSW)

SKIN (mrem) 8.850E-03(SSW) 6.750E-03 (SSW) 2.500E-03( SW) 1.740E-03(ESE) 1.903E-02(SSW)

ORGAN (mrem) 3.550E-04( SE) 1.775E-04( SW) 1.680E-04( NE) 1.170E-04( NE) 6.620E-04( SE)

CRITICAL PERSON Child Child Child Child Child CRITICAL ORGAN Thyroid Thyroid Thyroid Thyroid Thyroid COMPLIANCE STATUS 10 CFR 50 APP. I 10 CFR 50 APP.I TYPE OF DOSE QUARTERLY OBJECTIVE % OF APP. I YEARLY OBJECTIVE % OF APP. I GAMMA AIR (mrad) 5.0 0.36 10.0 0.39 BETA AIR (mrad) 10.0 0.03 20.0 0.02 WHOLE BODY (mrem) 2.5 0.29 5.0 0.32 SKIN (mrem) 7.5 0.12 15.0 0.13 ORGAN (mrem) 7.5 0.00 15.0 0.00 CRITICAL PERSON Child Child CRITICAL ORGAN Thyroid Thyroid Calculation used release data from the following:

Unit 0 - Chimney Date of calculation: 4/13/2007 E - 1.17 147 of 234

Table 3.4-1 (continued)

LaSalle Station - Unit 2 MAXIMUM DOSES RESULTING FROM AIRBORNE RELEASES 2006 TYPE OF DOSE FIRST QUARTER SECOND QUARTER THIRD QUARTER FOURTH QUARTER ANNUAL GAMMA AIR (mrad) 1.790E-02( SE) 1.570E-02( SW) 7.500E-03(WSW) 4.405E-03( N ) 3.933E-02( SW)

BETA AIR (mrad) 2.755E-03( SE) 1.315E-03( SW) 6.650E-04( NE) 3.740E-04( NE) 4.380E-03( SE)

WHOLE BODY (mrem) 7.350E-03(SSW) 5.700E-03(SSW) 2.085E-03( W ) 1.310E-03(ESE) 1.596E-02(SSW)

SKIN (mrem) 8.850E-03(SSW) 6.750E-03(SSW) 2.500E-03( SW) 1.740E-03(ESE) 1.903E-02(SSW)

ORGAN (mrem) 3.550E-04( SE) 1.775E-04( SW) 1.680E-04( NE) 1.170E-04( NE) 6.620E-04( SE)

CRITICAL PERSON Child Child Child Child Child CRITICAL ORGAN Thyroid Thyroid Thyroid Thyroid Thyroid COMPLIANCE STATUS 10 CFR 50 APP. I 10 CFR 50 APP.I TYPE OF DOSE QUARTERLY OBJECTIVE % OF APP. I YEARLY OBJECTIVE % OF APP. I GAMMA AIR (mrad) 5.0 0.36 10.0 0.39 BETA AIR (mrad) 10.0 0.03 20.0 0.02 WHOLE BODY (mrem) 2.5 0.29 5.0 0.32 SKIN (mrem) 7.5 0.12 15.0 0.13 ORGAN (mrem) 7.5 0.00 15.0 0.00 CRITICAL PERSON Child Child CRITICAL ORGAN Thyroid Thyroid Calculation used release data from the following:

Unit 0 - Chimney Date of calculation: 4/13/2007 E - 1.18 148 of 234

APPENDIX F METEOROLOGICAL 149 of 234

LaSalle Nuclear Station Period of Record: January - March 2006 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 2 0 0 0 N 0 0 2 2 0 0 0 NNE 0 1 3 2 0 0 0 NE 0 0 2 ENE 0 0 0 2 1 0 3 E 0 0 0 0 0 0 0 ESE 0 0 2 2 0 0 4 SE 0 0 0 1 0 0 1 SSE 0 0 2 2 2 0 6 S 0 0 1 2 2 1 6 SSW 0 0 0 5 2 0 7 SW 0 0 0 3 1 2 6 WSW 0 0 0 4 1 0 5 W 0 0 0 0 3 0 3 WNW 0 0 1 0 2 0 3 NW 0 0 2 0 0 0 2 NNW 0 0 0 2 0 0 2 Variable 0 0 0 0 0 0 0 Total 0 1 14 23 14 3 55 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: 0 150 of 234

LaSalle Nuclear Station Period of Record: January - March 2006 Stability Class - Moderately Unstable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 1 9 7 0 0 17 NNE 0 1 5 2 0 0 8 NE 0 0 0 1 0 0 1 ENE 0 0 1 1 0 0 2 E 0 0 1 0 0 0 1 ESE 0 0 0 0 0 0 0 SE 0 0 2 0 2 0 4 SSE 0 1 1 2 4 3 11 S 0 1 6 0 2 0 9 SSW 0 0 0 3 2 0 5 SW 0 5 2 2 1 1 11 WSW 0 0 0 2 3 2 7 W 0 2 2 2 4 0 10 WNW 0 1 5 16 4 2 28 NW 0 2 4 7 1 0 14 NNW 0 1 11 6 3 0 21 Variable 0 0 0 0 0 0 0 Total 0 15 49 51 26 8 149 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: 0 151 of 234

LaSalle Nuclear Station Period of Record: January - March 2006 Stability Class - Slightly Unstable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 4 18 4 0 0 26 NNE 0 4 11 5 0 0 20 NE 0 0 3 7 1 0 11 ENE 0 0 2 2 1 0 5 E 0 0 1 3 0 0 4 ESE 0 0 1 5 1 0 7 SE 0 1 5 2 0 0 8 SSE 0 2 4 6 6 0 18 S 0 0 3 6 1 0 10 SSW 0 1 4 1 1 0 7 SW 0 1 1 2 1 0 5 1 5 3 1 2 12 WSW 0 2 9 12 3 3 29 W 0 WNW 0 3 9 13 6 1 32 NW 0 3 7 13 1 0 24 NNW 0 1 6 15 6 0 28 Variable 0 0 0 0 0 0 0 Total 0 23 89 99 29 6 246 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: 0 152 of 234

LaSalle Nuclear Station Period of Record: January - March 2006 Stability Class - Neutral - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 14 39 10 0 63 NNE 26 23 3 0 52 NE 12 6 18 5 43 ENE 11 9 27 23 76 E 3 15 17 5 40 ESE 3 11 24 2 41 SE 2 10 9 1 22 SSE 3 7 12 5 27 S 3 8 6 5 22 SSW 1 5 9 8 23 SW 4 9 11 8 36 WSW 4 12 12 5 38 W 7 16 14 4 47 WNW 14 46 51 26 147 NW 7 29 29 11 76 NNW 9 43 52 20 125 Variable 0 0 0 0 0 Total 9 123 288 304 128 26 878 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 153 of 234

LaSalle Nuclear Station Period of Record: January - March 2006 Stability Class - Slightly Stable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 21 10 1 0 0 33 NNE 2 15 2 0 0 0 19 NE 3 5 1 1 0 0 10 ENE 3 1 7 4 0 0 15 E 5 12 18 5 0 0 40 ESE 0 8 11 5 0 0 24 SE 4 10 24 5 0 0 43 SSE 1 6 10 4 5 0 26 S 2 5 19 30 3 2 61 SSW 0 2 6 26 10 0 44 SW 1 2 12 14 3 0 32 WSW 0 3 12 2 1 0 18 W 0 7 7 1 4 7 26 WNW 6 12 19 2 8 12 59 NW 3 18 20 1 0 0 42 NNW 0 11 5 0 0 0 16 Variable 0 0 0 0 0 0 0 Total 31 138 183 101 34 21 508 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 154 of 234

LaSalle Nuclear Station Period of Record: January - March 2006 Stability Class - Moderately Stable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total 0 0 0 0 N 0 ii 11 0 0 0 0 1 NNE 0 1 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 6 0 0 0 E 4 6 16 5 0 0 0 ESE 1 6 12 2 0 0 0 SE 0 5 7 SSE 1 2 6 1 0 0 10 S 0 5 3 3 0 0 11 SSW 0 2 7 7 1 0 17 SW 0 5 13 4 1 0 23 WSW 0 6 24 2 0 0 32 W 1 4 11 1 0 0 17 WNW 0 18 9 1 0 0 28 NW 0 7 15 0 0 0 22 NNW 2 1 0 0 0 0 3 Variable 0 0 0 0 0 0 0 Total 9 79 101 19 2 0 210 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: 0 155 of 234

LaSalle Nuclear Station Period of Record: January - March 2006 Stability Class - Extremely Stable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total 0 0 0 0 N 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 2 0 2 0 0 0 0 ESE 1 0 1 4 0 0 0 SE 0 16 20 1 0 0 0 SSE 0 5 6 1 0 0 0 S 0 5 6 SSW 0 1 3 1 0 0 5 SW 1 2 5 0 0 0 8 WSW 0 0 11 3 0 0 14 W 0 6 1 1 0 0 8 WNW 1 9 3 0 0 0 13 NW 0 0 0 0 0 0 0 NNW 1 0 0 0 0 0 1 Variable 0 0 0 0 0 0 0 Total 6 44 29 5 0 0 84 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 class es: 0 156 of 234

LaSalle Nuclear Station Period of Record: January - March 2006 Stability Class - Extremely Unstable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total 0 0 0 0 N 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 S 0 0 0 0 1 0 0 SSW 0 0 1 0 0 0 0 SW 0 0 0 0 0 0 0 WSW 0 0 0 0 0 0 0 W 0 0 0 0 0 0 0 WNW 0 0 0 0 0 0 0 NW 0 0 0 0 0 0 0 NNW 0 0 0 0 0 0 0 Variable 0 0 0 Total 0 0 0 1 0 0 1 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 6 157 of 234

LaSalle Nuclear Station Period of Record: January - March 2006 Stability Class - Moderately Unstable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total 0 0 0 0 N 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 1 0 ESE 0 0 1 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 S 0 0 0 0 0 1 0 SSW 0 0 1 0 0 0 0 SW 0 0 0 0 0 0 0 WSW 0 0 0 0 0 0 0 W 0 0 0 0 0 0 0 WNW 0 0 0 0 2 0 0 NW 0 0 2 0 1 0 0 NNW 0 0 1 0 0 0 0 Variable 0 0 0 Total 0 0 0 3 2 0 5 Hours of calm in t:his stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 6 158 of 234

LaSalle Nuclear Station Period of Record: January - March 2006 Stability Class - Slightly Unstable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW Variable Total 0 0 6 9 17 9 41 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: 6 159 of 234

LaSalle Nuclear Station Period of Record: January - March 2006 Stability Class - Neutral - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 5 22 49 22 6 104 NNE 0 6 31 33 14 0 84 NE 0 6 10 9 24 13 62 ENE 1 7 10 8 26 23 75 E 0 1 8 6 16 3 34 ESE 0 1 2 8 5 6 22 SE 0 4 5 10 6 11 36 SSE 0 3 6 4 16 21 50 S 0 4 12 6 17 14 53 SSW 0 0 3 2 12 16 33 SW 0 9 5 10 11 15 50 WSW 1 1 6 13 12 13 46 W 0 8 15 20 14 24 81 WNW 0 2 21 46 39 47 155 NW 1 5 22 55 59 43 185 NNW 1 4 22 45 39 24 135 Variable 0 0 0 0 0 0 0 Total 4 66 200 324 332 279 1205 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 33 Hours of missing stability measurements in all stability classes: 6 160 of 234

LaSalle Nuclear Station Period of Record: January - March 2006 Stability Class - Slightly Stable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 4 7 15 3 0 30 NNE 1 1 7 12 4 1 26 NE 1 6 20 6 1 0 34 ENE 1 2 4 5 3 1 16 E 0 5 7 16 12 6 46 ESE 0 5 0 7 6 14 32 SE 0 1 4 7 9 15 36 SSE 0 3 4 11 16 21 55 S 1 6 1 6 7 24 45 SSW 0 3 1 6 9 77 96 SW 1 4 0 2 4 22 33 WSW 0 0 2 8 9 7 26 W 0 2 2 10 7 15 36 WNW 1 1 3 7 15 34 61 NW 0 2 9 11 21 4 47 NNW 1 4 5 11 12 0 33 Variable 0 0 0 0 0 0 0 Total 8 49 76 140 138 241 652 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: 6 161 of 234

LaSalle Nuclear Station Period of Record: January - March 2006 Stability Class - Moderately Stable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 5 4 0 0 9 1 1 1 1 0 0 4 NNE NE 0 0 1 1 0 0 2 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 1 4 6 1 12 SE 0 1 2 2 0 3 8 SSE 1 1 3 5 6 1 17 S 1 1 2 2 3 3 12 SSW 0 0 5 1 6 6 18 SW 0 1 2 3 5 10 21 WSW 0 0 1 2 4 3 10 W 1 1 1 1 15 9 28 WNW 0 3 0 4 7 1 15 NW 0 0 2 3 8 1 14 NNW 0 1 3 5 6 0 15 Variable 0 0 0 0 0 0 0 Total 4 10 29 38 66 38 185 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: 6 162 of 234

LaSalle Nuclear Station Period of Record: January - March 2006 Stability Class - Extremely Stable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total 0 0 0 0 N 0 1 1 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 1 ESE 0 1 1 0 0 0 1 SE 0 0 SSE 0 1 0 2 2 1 6 S 0 0 0 2 3 4 9 SSW 0 0 0 0 1 0 1 SW 0 1 0 1 1 2 5 WSW 0 0 0 0 0 1 1 W 0 0 0 0 1 1 2 WNW 0 0 0 0 0 1 1 NW 0 0 0 0 0 0 0 NNW 0 0 1 0 1 0 2 Variable 0 0 0 0 0 0 0 Total 0 4 2 5 9 10 30 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: 6 163 of 234

LaSalle Nuclear Station Period of Record: April - June 2006 Stability Class - Extremely Unstable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 NNE 0 1 0 NE 0 5 0 ENE 0 3 0 E 0 0 0 ESE 0 0 0 SE 0 0 0 SSE 0 0 S 0 0 SSW 0 0 SW 0 0 WSW 0 0 W 0 0 WNW 0 0 NW 0 0 NNW 0 0 Variable 0 0 Total 0 5 4 25 15 0 49 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 164 of 234

LaSalle Nuclear Station Period of Record: April - June 2006 Stability Class - Moderately Unstable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 9 1 12 NNE 0 12 0 12 NE 0 1 4 6 ENE 0 1 5 9 E 0 0 1 1 ESE 0 0 3 5 SE 0 0 0 1 SSE 0 1 3 6 S 0 1 8 10 SSW 0 4 9 14 SW 0 3 3 7 WSW 0 1 0 5 W 0 4 1 7 WNW 0 12 28 NW 0 10 5 18 NNW 0 5 5 10 Variable 0 0 0 0 Total 0 4 64 59 22 2 151 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 165 of 234

LaSalle Nuclear Station Period of Record: April - June 2006 Stability Class - Slightly Unstable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 7 6 1 0 0 14 NNE 0 5 11 2 1 0 19 NE 0 0 6 4 1 0 11 ENE 0 1 4 7 1 0 13 E 0 0 4 1 0 1 6 ESE 0 0 0 3 2 1 6 SE 0 0 0 2 0 1 3 SSE 0 0 0 3 3 3 9 S 0 0 2 5 3 1 11 SSW 1 0 11 8 0 0 20 SW 0 0 5 4 1 0 10 WSW 0 2 3 1 0 0 6 W 0 6 11 4 2 0 23 WNW 0 2 22 11 10 1 46 NW 0 5 8 4 3 0 20 NNW 0 8 4 0 1 0 13 Variable 0 0 0 0 0 0 0 Total 1 36 97 60 28 8 230 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 166 of 234

LaSalle Nuclear Station Period of Record: April - June 2006 Stability Class - Neutral - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 27 7 1 0 40 NNE 29 27 5 3 67 NE 26 43 30 6 107 ENE 16 12 17 1 47 E 10 19 6 6 41 ESE 7 5 20 11 52 SE 6 9 8 7 38 SSE 11 14 10 3 42 S 15 15 16 2 51 SSW 14 16 13 2 45 SW 7 9 9 2 27 WSW 8 10 13 1 33 W 8 11 7 4 30 WNW 4 19 11 25 65 NW 9 20 17 6 54 NNW 25 18 18 10 74 Variable 0 0 0 0 0 Total 16 222 254 201 89 31 813 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: 0 167 of 234

LaSalle Nuclear Station Period of Record: April - June 2006 Stability Class - Slightly Stable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 27 2 0 0 0 31 NNE 2 21 6 0 1 0 30 NE 0 7 7 3 0 0 17 ENE 1 10 13 8 0 0 32 E 1 13 25 10 4 0 53 ESE 0 8 5 11 8 0 32 SE 0 5 5 5 1 0 16 SSE 2 1 8 9 0 0 20 S 0 8 9 9 4 2 32 SSW 2 8 13 13 5 0 41 SW 1 8 12 6 1 0 28 WSW 1 5 9 2 1 0 18 W 1 5 13 0 2 0 21 WNW 1 10 8 2 0 0 21 NW 2 17 20 3 0 0 42 NNW 0 13 10 0 0 0 23 Variable 0 0 0 0 0 0 0 Total 16 166 165 81 27 2 457 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 168 of 234

LaSalle Nuclear Station Period of Record: April - June 2006 Stability Class - Moderately Stable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total 2 0 0 0 N 0 17 19 0 0 0 0 NNE 0 6 6 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 1 1 2 E 0 15 11 4 0 0 30 ESE 1 12 10 0 0 0 23 SE 0 10 4 0 0 0 14 SSE 3 9 9 0 0 0 21 S 2 8 22 4 0 0 36 SSW 2 9 10 0 1 0 22 SW 1 5 5 2 1 0 14 WSW 0 15 11 2 0 0 28 W 2 7 6 0 0 0 15 WNW 1 14 7 0 0 0 22 NW 0 18 9 0 0 0 27 NNW 0 6 1 0 0 0 7 Variable 0 0 0 0 0 0 0 Total 13 152 107 12 2 0 286 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: 0 169 of 234

LaSalle Nuclear Station Period of Record: April - June 2006 Stability Class - Extremely Stable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 1 NNE 0 0 0 NE 0 0 0 ENE 0 0 0 E 2 0 2 ESE 5 1 7 SE 23 1 25 SSE 16 20 37 S 6 19 26 SSW 7 2 9 SW 5 19 24 WSW 5 10 15 W 15 14 29 WNW 9 2 12 NW 2 0 2 NNW 3 0 3 Variable 0 0 0 Total 5 98 88 1 0 0 192 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: 0 170 of 234

LaSalle Nuclear Station Period of Record: April - June 2006 Stability Class - Extremely Unstable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 o o 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 S 0 0 0 0 0 0 0 SSW 0 0 0 0 0 0 0 SW 0 0 0 0 0 0 0 WSW 0 0 0 0 0 0 0 W 0 0 0 0 0 0 0 WNW 0 0 0 0 0 0 0 NW 0 0 0 0 0 0 0 NNW 0 0 0 0 0 0 0 Variable 0 0 0 Total 0 0 0 0 0 0 0 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 171 of 234

LaSalle Nuclear Station Period of Record: April - June 2006 Stability Class - Moderately Unstable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 0 0 0 NNE 0 0 0 0 1 1 2 NE 0 0 0 0 0 1 1 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 S 0 0 0 0 0 0 0 SSW 0 0 0 0 1 0 1 SW 0 0 0 0 0 2 2 WSW 0 0 0 0 0 0 0 W 0 0 0 0 0 0 0 WNW 0 0 0 0 0 0 0 NW 0 0 0 0 0 0 0 NNW 0 0 0 0 1 0 1 Variable 0 0 0 0 0 0 0 Total 0 0 0 0 3 4 7 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: 3 172 of 234

LaSalle Nuclear Station Period of Record: April - June 2006 Stability Class - Slightly Unstable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 4 NNE 6 NE 5 ENE 3 E 0 ESE 2 SE 0 SSE 1 S 3 SSW 10 SW 2 WSW 2 W 0 WNW 3 NW 3 NNW 3 Variable 0 Total 0 1 5 15 21 5 47 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 3 173 of 234

LaSalle Nuclear Station Period of Record: April - June 2006 Stability Class - Neutral - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 16 19 21 6 0 63 NNE 0 25 30 22 8 9 94 NE 1 19 24 47 42 16 149 ENE 0 13 11 26 19 7 76 E 0 6 4 21 3 4 38 ESE 0 5 2 11 14 32 64 SE 0 6 7 1 8 19 41 SSE 0 8 8 5 25 10 56 S 0 11 18 5 30 10 74 SSW 1 8 13 25 18 6 71 SW 0 3 6 15 21 0 45 WSW 0 4 11 12 10 4 41 W 1 4 13 20 6 9 53 WNW 1 0 23 37 28 34 123 NW 2 6 30 35 20 27 120 NNW 1 12 19 23 10 7 72 Variable 0 0 0 0 0 0 0 Total 8 146 238 326 268 194 1180 Hours of calm in this stability class: 0 class: 1 Hours of missing wind measurements in this stability Hours of missing stability measurements in all stability classes: 3 174 of 234

LaSalle Nuclear Station Period of Record: April - June 2006 Stability Class - Slightly Stable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 1 7 12 2 1 23 NNE 0 4 14 11 1 1 31 NE 1 7 12 17 1 0 38 ENE 0 7 17 18 2 2 46 E 0 5 13 13 6 12 49 ESE 0 5 5 9 2 19 40 SE 0 3 9 2 2 8 24 SSE 1 2 4 2 4 6 19 S 0 0 4 6 5 13 28 SSW 0 1 1 6 10 30 48 SW 1 1 6 6 8 16 38 WSW 0 1 5 10 5 4 25 W 0 2 5 7 8 3 25 WNW 0 2 3 10 15 9 39 NW 0 3 10 17 15 5 50 NNW 0 2 4 13 10 1 30 Variable 0 0 0 0 0 0 0 Total 3 46 119 159 96 130 553 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: 3 175 of 234

LaSalle Nuclear Station Period of Record: April - June 2006 Stability Class - Moderately Stable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 1 3 4 1 0 9 NNE 0 2 10 6 2 0 20 NE 0 4 0 0 0 0 4 ENE 0 2 1 0 0 0 3 E 0 1 4 1 4 0 10 ESE 0 2 7 6 1 2 18 SE 1 6 5 11 3 6 32 SSE 0 1 1 10 3 2 17 S 0 1 0 7 10 20 38 SSW 0 0 2 2 10 18 32 SW 0 2 1 4 3 11 21 WSW 0 2 2 4 6 5 19 W 0 0 4 3 5 2 14 WNW 0 2 4 10 8 6 30 NW 0 1 5 6 10 4 26 NNW 0 1 5 5 5 3 19 Variable 0 0 0 0 0 0 0 Total 1 28 54 79 71 79 312 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: 3 176 of 234

LaSalle Nuclear Station Period of Record: April - June 2006 Stability Class - Extremely Stable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 0 0 0 NNE 0 1 0 0 0 0 1 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 1 0 0 6 1 1 9 SSE 0 0 0 7 4 3 14 S 0 0 0 5 10 15 SSW 0 0 2 3 11 16 SW 0 1 1 2 5 9 WSW 0 1 0 1 2 4 W 0 1 0 0 0 1 WNW 0 1 0 2 4 7 NW 0 0 3 0 0 3 NNW 0 1 0 0 0 1 Variable 0 0 0 0 0 0 Total 1 5 19 18 36 80 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: 3 177 of 234

LaSalle Nuclear Station Period of Record: July - September 2006 Stability Class - Extremely Unstable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 1 1 0 0 0 2 NNE 0 0 0 0 0 0 0 NE 0 0 4 3 0 0 7 0 0 0 1 ENE 0 0 1 1 0 0 0 1 E 0 0 ESE 0 0 0 0 0 0 0 SE 0 2 3 0 0 0 5 SSE 0 1 1 0 0 0 2 S 0 1 1 4 0 0 6 SSW 0 1 5 3 0 0 9 SW 0 0 14 12 0 0 26 WSW 0 2 4 5 0 0 11 W 0 0 6 0 0 0 6 WNW 0 0 19 2 0 0 21 NW 0 0 2 0 0 0 2 NNW 0 2 6 1 0 0 9 Variable 0 0 0 0 0 0 0 Total 0 10 68 30 0 0 108 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 178 of 234

LaSalle Nuclear Station Period of Record: July - September 2006 Stability Class - Moderately Unstable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 7 0 0 0 7 NNE 0 4 8 0 0 0 12 NE 0 1 10 3 0 0 14 ENE 0 1 5 5 0 0 11 E 0 0 4 7 0 0 11 ESE 0 0 1 0 0 0 1 SE 0 3 4 1 1 0 9 SSE 0 0 4 1 1 0 6 S 0 2 1 4 0 0 7 SSW 1 2 10 2 0 0 15 SW 0 7 11 5 1 0 24 WSW 0 3 8 1 0 0 12 W 0 3 8 1 0 0 12 WNW 0 5 10 2 0 0 17 NW 0 1 3 0 0 0 4 0 3 0 0 0 3 NNW 0 0 0 0 0 Variable 0 0 0 1 32 97 32 3 0 165 Total Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 179 of 234

LaSalle Nuclear Station Period of Record: July - September 2006 Stability Class - Slightly Unstable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total 9 0 0 0 N 1 14 24 9 0 0 0 NNE 0 4 13 NE 0 4 16 3 0 0 23 ENE 0 1 12 8 0 0 21 E 0 5 5 3 0 0 13 ESE 0 1 2 0 0 0 3 SE 0 7 1 2 0 0 10 SSE 0 8 0 4 0 0 12 S 0 5 2 3 0 0 10 SSW 0 6 9 1 0 0 16 SW 0 3 10 6 2 0 21 WSW 0 9 8 2 0 0 19 W 0 10 6 3 0 0 19 WNW 0 5 8 3 0 0 16 NW 0 4 5 1 0 0 10 NNW 0 2 14 0 0 0 16 Variable 0 0 0 0 0 0 0 Total 1 88 116 39 2 0 246 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: 0 180 of 234

LaSalle Nuclear Station Period of Record: July - September 2006 Stability Class - Neutral - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 6 37 18 0 1 0 62 NNE 4 29 13 0 0 0 46 NE 1 11 40 5 0 0 57 ENE 1 12 33 30 0 0 76 E 2 12 28 3 0 0 45 ESE 3 15 6 0 0 0 24 SE 2 19 15 5 1 0 42 SSE 1 14 14 10 2 0 41 S 2 18 13 7 1 0 41 SSW 5 13 20 2 0 0 40 SW 2 11 19 10 1 0 43 WSW 3 16 11 2 1 0 33 W 0 17 12 12 2 0 43 WNW 0 17 11 13 1 0 42 NW 1 11 2 1 0 0 15 NNW 3 22 18 2 0 0 45 Variable 0 0 0 0 0 0 0 Total 36 274 273 102 10 0 695 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: 0 181 of 234

LaSalle Nuclear Station Period of Record: July - September 2006 Stability' Class - Slightly Stable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 15 0 0 0 0 15 NNE 2 15 2 0 0 0 19 NE 3 4 4 0 0 0 11 ENE 0 5 8 1 0 0 14 E 1 31 17 0 0 0 49 ESE 3 23 4 1 0 0 31 SE 3 8 7 8 1 0 27 SSE 1 11 12 1 0 0 25 S 2 10 14 0 0 0 26 SSW 1 19 35 0 0 0 55 SW 3 10 28 9 0 0 50 WSW 3 12 16 0 0 0 31 W 0 5 10 0 0 0 15 WNW 0 18 9 1 0 0 28 NW 0 7 4 0 0 0 11 NNW 2 10 3 0 0 0 15 Variable 0 0 0 0 0 0 0 Total 24 203 173 21 1 0 422 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: 0 182 of 234

LaSalle Nuclear Station Period of Record: July - September 2006 Stability Class - Moderately Stable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total 0 0 0 0 N 0 8 8 0 0 0 0 NNE 1 6 7 0 0 0 0 NE 0 2 2 0 0 0 0 ENE 2 0 2 9 0 0 0 E 0 10 19 0 0 0 0 ESE 1 19 20 3 0 0 0 SE 3 22 28 7 0 0 0 SSE 0 16 23 Ii 0 0 0 S 0 16 27 18 0 0 0 SSW 1 25 44 18 0 0 0 SW 1 13 32 8 0 0 0 WSW 0 14 22 7 0 0 0 W 3 10 20 0 0 0 0 WNW 3 11 14 0 0 0 0 NW 4 6 10 0 0 0 0 NNW 2 4 6 0 0 0 0 Variable 0 0 0 Total 21 182 81 0 0 0 284 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 183 of 234

LaSalle Nuclear Station Period of Record: July - September 2006 Stability Class - Extremely E;table - 200Ft-33Ft Delta-T (F)

Winds Measui ted at 33 Feet Winc Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Tot al N 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 1 0 0 0 0 0 1 E 1 7 2 0 0 0 10 ESE 1 21 0 0 0 0 22 SE 2 23 0 0 0 0 25 SSE 1 20 1 0 0 0 22 S 2 23 3 0 0 0 28 SSW 0 28 13 0 0 0 41 SW 1 27 9 0 0 0 37 WSW 3 21 8 0 0 0 32 W 1 23 3 0 0 0 27 WNW 2 28 0 0 0 0 30 NW 0 1 0 0 0 0 1 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 15 222 39 0 0 0 276 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: 0 184 of 234

LaSalle Nuclear Station Period of Record: July - September 2006 Stability Class - Extremely Unstable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total 0 0 0 0 N 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 S 0 0 0 0 0 0 0 SSW 0 0 0 0 0 0 0 SW 0 0 0 0 0 0 0 WSW 0 0 0 0 0 0 0 W 0 0 0 0 1 0 0 WNW 0 0 1 0 0 0 0 NW 0 0 0 0 0 0 0 NNW 0 0 0 0 0 0 0 Variable 0 0 0 Total 0 0 0 1 0 0 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 185 of 234

LaSalle Nuclear Station Period of Record: July - September 2006 Stability Class - Moderately Unstable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 0 0 0 0 0

NNE 0 0 0 0 0 0 0

NE 0 0 0 0 0 0 0

ENE 0 0 0 0 0 0 0

E 0 0 0 0 0 0 0

ESE 0 0 0 0 0 0 0

SE 0 0 1 0 0 0 1

SSE 0 0 0 0 0 0 0

S 0 0 0 0 0 0 0

SSW 0 0 0 0 0 0 0

SW 0 0 0 0 2 0 2 WSW 0 0 1 4 1 0 6 W 0 0 0 0 0 0 0 WNW 0 0 0 1 0 0 1 NW 0 0 0 0 0 0 0 NNW 0 0 0 1 4 0 5 Variable 0 0 0 0 0 0 0 Total 0 0 2 6 7 0 15 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: 0 186 of 234

LaSalle Nuclear Station Period of Record: July - September 2006 Stability Class - Slightly Unstable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 2 2 4 NNE 0 0 0 0 0 NE 0 0 0 5 7 ENE 0 0 0 2 2 E 0 0 0 0 0 ESE 0 1 0 0 1 0 1 0 1 2 SE SSE 0 0 0 0 0 S 0 0 0 1 5 SSW 0 0 1 0 3 SW 0 0 5 10 19 WSW 0 0 3 7 10 0 0 0 0 0 W

WNW 0 1 2 2 5 NW 0 0 2 1 3 NNW 0 0 1 1 2 Variable 0 0 0 0 0 Total 0 3 16 32 12 0 63 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: 0 187 of 234

LaSalle Nuclear Station Period of Record: July - September 2006 Stability Class - Neutral - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 11 40 29 1 84 NNE 5 24 15 5 52 NE 10 22 44 33 110 ENE 5 25 52 35 118 E 5 24 18 6 55 ESE 6 4 5 1 18 SE 13 15 9 6 47 SSE 12 28 11 8 65 S 7 24 9 12 61 SSW 10 18 16 8 54 SW 13 23 27 25 97 WSW 16 16 15 5 55 W 13 22 20 10 67 WNW 8 24 24 20 79 NW 5 15 21 6 47 NNW 10 16 15 2 44 Variable 0 0 0 0 0 Total 21 149 340 330 183 30 1053 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: 0 188 of 234

LaSalle Nuclear Station Period of Record: July - September 2006 Stability Class - Slightly Stable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 10 12 4 0 31 NNE 11 8 2 0 24 NE 17 10 7 0 37 ENE 6 16 8 0 37 E 15 18 6 0 46 ESE 6 5 11 0 26 SE 9 5 8 6 30 SSE 17 7 4 0 29 S 11 9 11 6 43 SSW 6 10 21 14 55 SW 4 20 16 30 74 WSW 13 8 11 4 42 W 4 9 18 3 38 WNW 5 7 8 3 25 NW 3 11 5 0 22 NNW 9 1 1 0 15 Variable 0 0 0 0 0 Total 9 56 146 156 141 66 574 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: 0 189 of 234

LaSalle Nuclear Station Period of Record: July - September 2006 Stability Class - Moderately Stable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total 0 0 N 1 2 4 2 9 0 0 NNE 1 0 0 0 1 1 0 NE 1 1 1 2 6 1 0 ENE 0 2 1 2 6 E 0 2 2 2 4 0 10 ESE 0 2 9 3 3 0 17 SE 0 4 7 6 4 0 21 SSE 0 1 5 7 5 7 25 S 1 3 4 14 7 15 44 SSW 3 2 1 7 12 23 48 SW 1 3 8 7 26 35 80 WSW 0 3 8 7 6 4 28 W 0 4 8 5 11 0 28 WNW 0 3 5 3 5 0 16 NW 0 2 4 11 13 0 30 NNW 0 3 0 1 1 0 5 Variable 0 0 0 0 0 0 0 Total 8 37 67 79 99 84 374 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: 0 190 of 234

LaSalle Nuclear Station Period of Record: July - September 2006 Stability Class - Extremely Stable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 1 0 0 1 NNE 0 0 0 0 0 NE 0 0 0 0 0 ENE 0 0 0 0 0 E 0 0 0 0 0 ESE 0 0 0 2 2 SE 0 0 3 10 14 SSE 0 1 6 4 11 S 0 0 3 7 10 SSW 0 1 6 9 18 SW 1 2 2 4 16 WSW 0 1 4 4 11 W 0 0 11 0 17 WNW 0 0 4 2 11 NW 0 0 2 7 9 NNW 0 1 2 0 3 Variable 0 0 0 0 0 Total 1 7 16 43 49 7 123 Hours of calm in this stability class: 0 Hours of missing wind measurements in this sta bility class: 0 Hours of missing stability measurements in all stability class es: 0 191 of 234

LaSalle Nuclear Station Period of Record: October - December2006 Stability Class - Extremely Unstable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 9 8 0 18 NNE 0 2 1 0 3 NE 0 0 5 0 5 ENE 0 1 2 0 3 E 0 4 8 0 13 ESE 0 1 1 2 6 SE 0 2 1 0 6 SSE 0 0 1 0 2 S 0 0 1 0 2 SSW 0 2 3 0 7 SW 0 5 1 0 8 WSW 0 1 0 1 6 W 0 0 0 14 2 0 16 WNW 0 0 0 0 0 1 1 NW 0 1 1 0 1 0 3 NNW 0 1 4 7 1 1 14 Variable 0 0 0 0 0 0 0 Total 0 8 32 53 15 5 113 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: 0 192 of 234

LaSalle Nuclear Station Period of Record: October - December2006 Stability Class - Moderately Unstable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 1 1 5 1 0 8 NNE 0 0 8 8 1 0 17 NE 0 0 1 2 1 0 4 ENE 0 0 0 0 0 0 0 E 0 0 8 2 0 0 10 ESE 0 0 5 0 0 0 5 SE 0 0 1 1 0 0 2 SSE 0 1 0 0 0 0 1 S 0 0 2 1 0 0 3 SSW 0 0 2 3 0 0 5 SW 0 0 2 0 1 0 3 WSW 0 1 3 0 1 0 5 W 0 0 0 4 6 2 12 WNW 0 2 2 1 1 1 7 NW 0 0 0 1 0 0 1 NNW 0 1 0 4 2 0 7 Variable 0 0 0 0 0 0 0 Total 0 6 35 32 14 3 90 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: 0 193 of 234

LaSalle Nuclear Station Period of Record: October - December2006 Stability Class - Slightly Unstable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 3 7 1 0 11 NNE 0 0 4 3 0 0 7 NE 0 0 2 4 1 0 7 ENE 0 0 2 4 0 0 6 E 0 0 7 2 0 0 9 ESE 0 1 3 6 0 0 10 SE 0 0 1 0 0 0 1 SSE 0 2 1 3 0 0 6 S 0 1 3 6 1 0 11 SSW 0 0 9 5 0 0 14 SW 0 0 5 5 2 0 12 WSW 0 0 1 1 2 0 4 W 0 0 1 7 3 2 13 WNW 0 2 2 9 3 0 16 NW 0 1 2 6 3 0 12 NNW 0 3 2 11 1 0 17 Variable 0 0 0 0 0 0 0 Total 0 10 48 79 17 2 156 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: 0 194 of 234

LaSalle Nuclear Station Period of Record: October - December2006 Stability Class - Neutral - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 21 8 12 7 0 50 NNE 1 9 13 9 1 0 33 NE 1 1 7 15 2 0 26 ENE 1 4 4 7 3 0 19 E 1 11 15 7 2 0 36 ESE 0 6 7 11 2 0 26 SE 1 10 5 10 2 0 28 SSE 1 9 18 10 0 0 38 S 1 6 17 17 5 0 46 SSW 0 7 27 28 5 0 67 SW 1 7 27 13 3 0 51 WSW 0 5 16 5 3 0 29 W 0 9 31 18 7 2 67 WNW 0 19 22 45 16 4 106 NW 0 9 17 9 4 1 40 NNW 1 15 43 26 6 0 91 Variable 0 0 0 0 0 0 0 Total 11 148 277 242 68 7 753 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: 0 195 of 234

LaSalle Nuclear Station Period of Record: October - December2006 Stability Class - Slightly Stable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 5 1 0 0 6 NNE 2 10 1 0 0 13 NE 1 0 3 1 0 5 ENE 1 3 1 8 0 13 E 2 13 7 2 0 24 ESE 3 7 1 1 0 12 SE 3 10 28 3 0 44 SSE 1 7 32 4 0 44 S 0 9 23 32 3 67 SSW 0 3 19 34 14 70 SW 0 13 13 28 13 67 WSW 1 10 21 18 1 51 W 2 6 17 9 1 36 WNW 2 5 7 17 5 39 NW 1 13 14 1 1 30 NNW 1 4 5 0 0 10 Variable 0 0 0 0 0 0 Total 20 118 193 158 38 4 531 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 196 of 234

LaSalle Nuclear Station Period of Record: October - December2006 Stability Class - Moderately Stable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total 0 0 0 0 N 0 2 2 0 0 0 0 NNE 1 1 2 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 4 0 0 0 E 0 4 8 5 0 0 0 ESE 1 5 11 12 0 0 0 SE 0 13 25 SSE 0 12 28 2 0 0 42 S 0 11 20 3 0 0 34 SSW 0 9 19 11 1 0 40 SW 1 4 7 16 2 0 30 WSW 0 5 18 3 0 0 26 W 0 2 27 9 0 0 38 WNW 0 7 7 0 0 0 14 NW 0 3 8 0 0 0 11 NNW 0 0 1 0 0 0 1 Variable 0 0 0 0 0 0 0 Total 3 78 156 44 3 0 284 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: 0 197 of 234

LaSalle Nuclear Station Period of Record: October - December2006 Stability Class - Extremely Stable - 200Ft-33Ft Delta-T (F)

Winds Measured at 33 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total 0 0 0 0 1 N 1 0 0 0 0 0 1 NNE 0 1 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 1 0 0 0 E 0 1 2 0 0 0 0 ESE 0 7 7 22 0 0 0 SE 0 26 48 22 0 0 0 SSE 0 14 36 S 0 18 19 0 0 0 37 SSW 0 16 11 1 0 0 28 SW 0 11 12 0 0 0 23 WSW 1 11 28 0 0 0 40 W 0 16 15 1 0 0 32 WNW 0 7 1 0 0 0 8 NW 0 0 0 0 0 0 0 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 2 128 131 2 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 class es: 0 198 of 234

LaSalle Nuclear Station Period of Record: October - December2006 Stability Class - Extremely Unstable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total 0 0 0 0 N 0 0 0 0 0 0 0 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 S 0 0 0 0 0 0 0 SSW 0 0 0 0 0 0 2 SW 0 0 2 0 0 0 0 WSW 0 0 0 0 0 0 0 W 0 0 0 0 0 0 0 WNW 0 0 0 0 0 0 0 NW 0 0 0 0 0 0 0 NNW 0 0 0 0 0 0 0 Variable 0 0 0 Total 0 0 0 0 0 2 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: 11 199 of 234

LaSalle Nuclear Station Period of Record: October - December2006 Stability Class - Moderately Unstable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 2 4 3 2 11 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 1 1 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 S 0 0 0 0 0 0 0 SSW 0 0 1 0 1 0 2 SW 0 0 0 0 0 0 0 WSW 0 0 0 0 0 1 1 W 0 0 0 0 0 0 0 WNW 0 0 0 0 0 0 0 NW 0 0 0 0 0 0 0 NNW 0 0 0 0 1 0 1 Variable 0 0 0 0 0 0 0 Total 0 0 3 4 5 4 16 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: 11 200 of 234

LaSalle Nuclear Station Period of Record: October - December2006 Stability Class - Slightly Unstable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total 0 0 2 4 0 N 0 6 0 0 4 0 0 NNE 0 4 0 0 0 5 0 NE 0 5 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 2 ESE 0 2 0 0 0 0 0 SE 0 0 0 0 0 0 0 SSE 0 0 0 0 0 0 0 s 0 0 SSW 0 0 0 1 1 0 2 SW 0 1 1 2 1 0 5 WSW 0 0 0 0 0 5 5 W 0 0 0 2 1 1 4 WNW 0 0 0 0 0 0 0 NW 0 0 0 0 0 0 0 NNW 0 0 0 1 1 0 2 Variable 0 0 0 0 0 0 0 Total 0 1 1 12 13 8 35 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 7 Hours of missing stability measurements in all stability classes: 11 201 of 234

LaSalle Nuclear Station Period of Record: October - December2006 Stability Class - Neutral - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 1 10 14 13 18 15 71 NNE 0 5 4 13 17 8 47 NE 1 2 1 16 14 8 42 ENE 0 4 5 9 8 6 32 E 1 0 8 20 9 5 43 ESE 0 2 3 11 22 9 47 SE 0 1 4 10 7 10 32 SSE 0 3 17 10 10 0 40 S 0 7 16 21 15 13 72 SSW 0 7 11 19 20 22 79 SW 1 3 18 23 9 17 71 WSW 0 3 11 2 10 8 34 W 0 0 11 25 11 26 73 WNW 0 8 14 25 31 17 95 NW 0 5 20 20 21 15 81 NNW 0 7 14 28 27 13 89 Variable 0 0 0 0 0 0 0 Total 4 67 171 265 249 192 948 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 50 Hours of missing stability measurements in all stability classes: 11 202 of 234

LaSalle Nuclear Station Period of Record: October - December2006 Stability Class - Slightly Stable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 1 2 2 0 8 NNE 1 2 6 0 1 14 NE 2 4 2 3 0 12 ENE 0 5 1 1 3 11 E 1 2 1 1 4 14 ESE 1 0 3 3 4 17 SE 2 1 8 0 1 21 SSE 0 2 27 21 9 66 S 0 5 20 23 47 99 SSW 1 3 5 12 69 94 SW 1 8 11 10 45 80 WSW 1 0 12 12 18 45 W 0 1 10 19 15 46 WNW 0 2 3 20 29 56 NW 0 1 6 7 6 22 NNW 2 1 17 9 0 30 Variable 0 0 0 0 0 0 Total 14 38 55 134 143 251 635 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 23 Hours of missing stability measurements in all stability classes: 11 203 of 234

LaSalle Nuclear Station Period of Record: October - December2006 Stability Class - Moderately Stable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 2 0 2 0 4 0 0 1 NNE 0 0 1 0 0 1 NE 0 ENE 0 0 0 0 0 E 0 0 1 0 2 ESE 0 0 0 0 2 SE 1 1 4 0 7 SSE 1 8 11 10 30 S 4 5 12 27 49 SSW 2 7 8 44 63 SW 3 12 9 23 47 WSW 3 3 7 4 17 W 1 5 7 22 35 WNW 2 13 24 8 47 NW 3 5 3 1 12 NNW 0 2 11 0 13 Variable 0 0 0 0 0 Total 1 7 22 62 99 139 330 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 4 Hours of missing stability measurements in all stability classes: 11 204 of 234

LaSalle Nuclear Station Period of Record: October - December2006 Stability Class - Extremely Stable - 375Ft-33Ft Delta-T (F)

Winds Measured at 375 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 3 0 0 3 NNE 0 0 0 0 0 NE 0 0 0 0 0 ENE 0 0 0 0 0 E 0 0 0 0 0 ESE 0 0 1 0 1 SE 0 0 3 0 3 SSE 0 0 4 7 16 S 0 0 13 23 37 SSW 1 0 13 20 36 SW 0 0 8 5 16 WSW 0 0 0 2 7 W 0 0 1 0 7 WNW 1 0 0 0 8 NW 0 2 0 0 4 NNW 0 0 0 0 0 Variable 0 0 0 0 0 Total 2 5 16 15 43 57 138 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 8 Hours of missing stability measurements in all stability classes: 11 205 of 234

APPENDIX G ANNUAL RADIOLOGICAL GROUNDWATER PROTECTION PROGRAM REPORT (ARGPPR) 206 of 234

Docket No: 50-373 50-374 LASALLE COUNTY STATION UNITS 1 and 2 Annual Radiological Groundwater Protection Program Report 1 January Through 31 December 2006 Prepared By Teledyne Brown Engineering Environmental Services Exel r nSM Nuclear LaSalle County Station Marseilles, IL 61341 May 2007 207 of 23 I

Table Of Contents I. Sum m ary and Conclusions ................................................................................................ 1 I1. Introduction ........................................................................................................................ 3 A. Objectives of the RGPP .................................................................................. 3 B. Im plem entation of the O bjectives ...................................................................... 3 C. Program Description ........................................................................................ 4 D. Characteristics of Tritium (H-3) ........................................................................ 5 IIl. Program Description ................................................................................................... 6 A. Sam ple 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 .................................................................................................. 11 G . Actions Taken ................................................................................................ 11 208 of 234

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

Appendix B Data Tables Tables Table B-I.1 Concentrations of Tritium in Groundwater and Surface Water Samples Collected in the Vicinity of LaSalle County Station, 2006.

Table B-1.2 Highest to Lowest Concentrations of Tritium in Groundwater and Surface Water Samples Collected in the Vicinity of LaSalle County Station, 2006.

Table B-I.3 Concentrations of Strontium in Groundwater and Surface Water Samples Collected in the Vicinity of LaSalle County Station, 2006.

Table B-1.4 Highest to Lowest Concentrations of Strontium in Groundwater and Surface Water Samples Collected in the Vicinity of LaSalle County Station, 2006.

Table B-1.5 Concentrations of Gamma Emitters in Groundwater and Surface Water Samples Collected in the Vicinity of LaSalle County Station, 2006.

Table B-1.6 Highest to Lowest Concentrations of Gamma Emitters in Groundwater and Surface Water Samples Collected in the Vicinity of LaSalle County Station, 2006.

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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 2006 are included in this report.

This is the first 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 2006. During that time period, 169 analyses were performed on 57 samples from 32 locations. The monitoring was conducted in two phases. Phase 1 of the monitoring was part of a comprehensive study initiated by Exelon to determine whether groundwater or surface water at and in the vicinity of LaSalle County Station had been adversely impacted by any releases of radionuclides. This phase was conducted by Conestoga Rovers and Associates (CRA) and the conclusions were made available to state and federal regulators as well as the public on an Exelon web site:

httpnllwww.exeloncom.r.com/ourcompaniestpowergen/nuclear/Tritium.htm].

Phase 2 of the RGPP was conducted by Exelon corporate and station personnel to initiate follow up of Phase I and begin long-term monitoring at groundwater and surface water locations selected during Phase 1. All analytical results from both the Phase 1 and Phase 2 monitoring are reported herein.

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.

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

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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.

Strontium-89/90 was not detected at a concentration greater than the LLD of 2.0 picoCuries per liter (pCVL) in any of the groundwater or surface water samples tested.

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 1 of 26 groundwater monitoring well locations. The tritium concentrations ranged from 776 +/- 153 pCi/L to 1,940 +/- 255 pCi/L. Additionally, low levels of tritium were detected at concentrations greater than the LLD of 200 pCi/L in 4 of 14 surface water samples. These samples were obtained from 6 surface water locations. The tritium concentrations in affected surface water samples ranged from 219 +/- 113 pCi/L to 721 +/- 147 pCi/L.

Elevated tritium levels (>200) observed in the single well location are believed to be associated with the 2001 CY tank rupture as documented in the station's 10CFR75g report. Surface water samples with measured tritium concentrations above 200 pCi/L are believed to be due to the Illinois River make-up water, as LaSalle Station is a zero liquid radwaste release plant. LaSalle's REMP analyses of Illinois River samples have historically shown periodic results above 200 pCi/L for tritium analysis. These values are believed to be related to contributions from plants up river from LaSalle.

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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 2006.

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:

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1. Exelon and its consultant identified locations as described in the Phase 1 study. Phase I 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&Iwww.p-xelonCorpnncom/ourcompanies/powergen/nucle;rfTritiu m.him

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-1, Appendix A.

Groundwater and Surface Water Samples of water are collected, managed, transported and analyzed in accordance with approved procedures following EPA methods. Both groundwater and surface 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.

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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.

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Ill. 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 2006.

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

1. Concentrations of gamma emitters in groundwater and surface water.

2. Concentrations of strontium in groundwater and surface water.

3. Concentrations of tritium in groundwater and surface water.

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. Lanoratory Mep;urements Uncertainty The estimated uncertainty in measurement of tritium in environmental samples is frequently on the order of 50% of the measurement value.

Statistically, the exact value of a measurement is expressed as a range with a stated level of confidence. The convention is to report results with a 95% level of confidence. The uncertainty comes from calibration standards, sample volume or weight measurements, sampling uncertainty and other factors. Exelon reports the uncertainty of a measurement created by statistical process (counting error) as well as all sources of error (Total Propagated 215 of 234

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.

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

For groundwater and surface water 11 nuclides, Mn-54, Co-58, Fe-59, Co-60, Zn-65, Nb-95, Zr-95, Cs-134, Cs-137, Ba-140 and La-140 were reported.

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.

I. 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, uCosmogenic" tritium is produced from the bombardment of stable nuclides and combines with oxygen to form tritiated water, which will then enter the hydrologic 216 of 234

cycle. Below ground, "lithogenic" tritium is produced by the bombardment of natural lithium present in crystalline rocks by neutrons produced by the radioactive decay of naturally abundant uranium and thorium. Lithogenic production of tritium is usually negligible compared to other sources due to the limited abundance of lithium in rock. The lithogenic tritium is introduced directly to groundwater.

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

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

RadNet provides tritium precipitation concentration data for samples collected at stations 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. However, LaSalle's 1981 pre-operational REMP report showed precipitation tritium concentrations in excess of 300 pCi/L at 2 of 4 sample locations. 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 subject to being affected by the surface 217 of 234

water from the 1960s that was elevated in tritium. Surface Water Data Tritium concentrations are routinely measured in large surface water bodies, including Lake Michigan and the Mississippi River. Illinois surface water data were typically less than 200 pCi/L. Illinois River tritium results have historically shown periodic results >200 pCi/L, not related to LaSalle plant operation, as evidenced in LaSalle's REMP program sample results.

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.

Tritum Samples from all locations were analyzed for tritium activity (Table B-1.1 and B-1.2, Appendix B). Tritium values were <LLD with the exception of the one on-site well location that showed a maximum concentration of 1940 pCi/l. Outside of the owner-controlled area, tritium concentrations were less than the detection limit. Based on 218 of 234

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.

Strontium Strontium-90 was detected in four samples at concentration of 0.9 to 1.9 pCi/liter. This was less than the required detection limit of 2.0 pCi/liter. (Table B-1.3 and B-1.4, Appendix B).

Gnmmn Fmitters and Strontium Naturally occurring Potassium-40 was detected in twenty of 57 samples. The concentrations ranged from 41 pCi/liter to 978 pCi/liter. No other gamma emitting nuclides were detected. (Table B-1.5 and B-1.6, Appendix B).

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.

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F. Investigations There were no anomalous result investigations conducted at for LaSalle RGPP sample results in 2006.

G. Actions Taken

1. Compensatory Actions There were no required compensatory actions as a result of RGPP monitoring at LaSalle in 2006.

2. Installation of Monitoring Wells No new monitoring wells were added beyond the initial phase for LaSalle in 2006.

3. Actions to Recover/Reverse Plumes 2006 LaSalle RGPP effort s resulted in no required actions.

Figure A-I: LaSalle County Station Map of Groundwater Monitoring Sample Locations

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APPENDIX A LOCATION DESIGNATION & DISTANCE 221 of 234

Table A-I 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-1 222 of 234

Location Current Well Sample No. Status MW-LS-109S Inactive Near BDG 33 MW-LS- 110S Inactive RSH Area by Valve Pit 16B MW-LS-l i11S West Permiter Road before pad mounted transformer Active (right hand side)

MW-LSI 12SInactive MW-LS-1 12S Between perimeter security fences near SE comer.

(Access via security gate east of 12 KV switchyard)

MW-LS-1 13S 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-2 223 of 234

FIGURE A-1 LASALLE COUNTY STATION MAP OF GROUNDATER MONITORING SAMPLE LOCATIONS A-3 224 of 234

RA07-041, Annual Radiological Environmental Operating Report, 1 January Through 31 December 2006

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