Text

Annual Radiological Environmental Operating Report
	ML071370157
Person / Time
Site:	Zion File:ZionSolutions icon.png
Issue date:	12/31/2006
From:	; Teledyne Brown Engineering Environmental Services
To:	; NRC/FSME
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NRC Docket No:

50-295 50-304 ZION NUCLEAR POWER STATION UNITS 1 and 2 Annual Radiological Environmental Operating Report 1 January Through 31 December 2006 Prepared By Teledyne Brown Engineering Environmental Services Nuclear Zion Nuclear Power Station Zion, IL 60099 April 2007

Table Of Contents I. Sum m ary and Conclusions..........................................................................................

1 I1. In tro d u c tio n........................................................................................................................

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

3 B. Im plem entation of the O bjectives....................................................................

3 Ill. Program Description.....................................................................................................

3 A. Sam ple Collection.............................................................................................

3 B. Sam ple Analysis..............................................................................................

5 C. Data Interpretation...........................................................................................

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

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

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

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

8

1. Public W ater..........................................................................................

8

2. Fish.........................................................................................................

8

3. Sedim ent.................................................................................................

9 B. Atm ospheric Environm ent..................................................................................

ý.. 9

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

9

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

9 C. Am bient G am m a Radiation............................................................................

10 D. Land Use Survey.............................................................................................

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

10

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

Table B-2:

Radiological Environmental Monitoring Program Quarterly and Annual Summaries for the Zion Nuclear Power Station, 2006

.Location Designation, Distance & Direction, and Sample Collection &

Analytical Methods Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, Zion Nuclear Power Station, 2006 Radiological Environmental Monitoring Program - Summary of Sample Collection and Analytical Methods, Zion Nuclear Power Station, 2006 Figures Figure B-1:

Figure B-2:

Appendix C Table Table C-1.1 Table C-1.2 Table 0-1.3 Table C-11.1 Inner Ring TLD Locations and Fixed Air Samplers of the Zion Nuclear Power Station, 2006 Fish, Water and Sediment Locations of the Zion Nuclear Power Station, 2006 Data Tables and Figures - Primary Laboratory Concentrations of Gross Beta in Public Water Samples Collected in the Vicinity of Zion Nuclear Power Station, 2006 Concentrations of Tritium in Public Water Samples Collected in the Vicinity of Zion Nuclear Power Station, 2006.

Concentrations of Gamma Emitters in Public Water Samples Collected in the Vicinity of Zion Nuclear Power Station, 2006.

Concentrations of Gamma Emitters in Fish Samples Collected in the Vicinity of Zion Nuclear Power Station, 2006.

ii

Table C-111.1 Table C-IV. 1 Table C-IV.2 Table C-IV.3 Table C-V. 1 Table C-V.2 Table C-V.3 Table C-VI.1 Concentrations of Gamma Emitters in Sediment Samples Collected in the Vicinity of Zion Nuclear Power Station, 2006.

Concentrations of Gross Beta in Air Particulate Samples Collected in the Vicinity of Zion Nuclear Power Station, 2006.

Monthly and Yearly Mean Values of Gross Beta Concentrations (E-3 pCi/cu meter) in Air Particulate Samples Collected in the Vicinity of Zion Nuclear Power Station, 2006.

Concentrations of Gamma Emitters in Air Particulate Samples Collected in the Vicinity of Zion Nuclear Power Station, 2006.

Quarterly TLD Results for Zion Nuclear Power Station, 2006.

Mean Quarterly TLD Results for the Inner and Other Locations for Zion Nuclear Power Station, 2006.

Summary of the Ambient Dosimetry Program for.Zion Nuclear Power Station, 2006.

Summary of Collection Dates for Samples Collected in the Vicinity of Zion Nuclear Power Station, 2006.

Eigjures Figure C-1 Figure C-2 Figure C-3 Figure C-4 Figure C-5 Figure C-6 Public Water-Gross Beta - Stations Z-14 and Z-15 Collected in the Vicinity of ZNPS, 2000 - 2006.

Public Water-Gross Beta - Stations Z-16 and Z-18 Collected in the Vicinity of ZNPS, 2000 - 2006.

Public Water - Tritium - Stations Z-1 4 and Z-1 5 Collected in the Vicinity of ZNPS, 2000 - 2006.

Public Water - Tritium - Stations Z-1 6 and Z-1 8 Collected in the Vicinity of ZNPS, 2000 - 2006.

Air Particulates - Gross Beta - Stations Z-01 and Z-02 Collected in the Vicinity of ZNPS, 2000 - 2006.

Air Particulate - Gross Beta - Station Z-03 Collected in the Vicinity of ZNPS, 2000 - 2006.

iii

Appendix D Inter-Laboratory Comparison Program Tables Table D-1 Table D-2 Table D-3 Table D-4 Table D-5 Analytics Environmental Radioactivity Cross Check Program Teledyne Brown Engineering, 2006 ERA Environmental Radioactivity Cross Check Program Teledyne Brown Engineering, 2006 DOE's Mixed Analyte Performance Evaluation Program (MAPEP)

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

Environmental, Inc., 2006 Effluent Data Meteorological Data Annual Radiological Groundwater Protection Program Report (ARGPPR)

Appendix E Appendix F Appendix G iv

Summary and Conclusions This report on the Radiological Environmental Monitoring Program conducted for the Zion Nuclear Power Station (ZNPS) by Exelon covers the period 1 January 2006 through 31 December 2006. During that time period, 422 analyses were performed on 250 samples. In assessing all the data gathered for this report and comparing these results with preoperational data, it was concluded that the operation of ZNPS had no adverse radiological impact on the environment.

Public water samples were analyzed for concentrations of gross beta, 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. Cs-1 37 activity was detected in fish. Sediment samples had Cesium-137 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.

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

Intentionally left blank II.

Introduction The Zion Nuclear Power Station (ZN PS), consisting of two 1100 MWt pressurized water reactor owned and operated by Exelon Corporation, is located in Zion, Illinois adjacent to Lake Michigan. Unit No. 1 went critical in December 1973. Unit No. 2 went critical in September 1974. The plant permanently ceased operation in January of 1998 and has been permanently defueled. The site is located in northeast Illinois on the western shore of Lake Michigan, approximately 50 miles north of Chicago, Illinois.

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.

Ill.

Program Description A.

Sample Collection Samples for the ZNPS REMP were collected for Exelon Nuclear by Environmental Inc. (Midwest Labs). This section describes the general collection methods used by Environmental Inc. (Midwest Labs) to obtain environmental samples for the ZNPS REMP in 2006. Sample locations and descriptions can be found in Table B-1 and Figures B-1 and B-2, Appendix B. The sampling methods used by Environmental Inc. (Midwest Labs) are listed in Table B-2.

Aquatic Environment The aquatic environment was evaluated by performing radiological analyses on samples of public water, fish, and sediment. Two gallon water samples were collected monthly from four public water locations (Z-14, Z-15, Z-16 and Z-18). Control locations were Z-14 and Z-18. All samples were collected in new unused plastic bottles, which were rinsed at least twice with source water prior to collection. Fish samples comprising the flesh of lake trout and burbot were collected semiannually at two locations, Z-26 and Z-27, both Control locations. Sediment samples composed of recently deposited substrate were collected at one location semiannually, Z-25.

Atmospheric Environment The atmospheric environment was evaluated by performing radiological analyses on samples of air particulates. Airborne particulate samples were collected and analyzed weekly at three locations (Z-01, Z-02 and Z-03). No control location was required. Airborne particulate samples were obtained at each location, using a vacuum pump with glass fiber filters attached. The pumps were run continuously and sampled air at the rate of approximately one cubic foot per minute. The filters were replaced weekly and sent to the laboratory for analysis.

Ambient Gamma Radiation Direct radiation measurements were made using 2 CaF 200 and 2 LiF 100 LiF 4-chip Harshaw thermoluminescent dosimeters (TLD). Each location consisted of 2 TLD sets. The TLD locations were placed on and around the ZNPS site at the following loations:

Z-101, Z-102, Z-103, Z-104, Z-105, Z-106, Z-107, Z-108, Z-110, Z-111, Z-112, Z-113, Z-114, Z-115, Z-301, Z-01, Z-02 and Z-03.

No control location was required.

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 ZNPS, if any, would be most significant;

3.

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

4.

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

(Two TLDs - each comprised of two CaF2 200 and 2 LiF 100 LiF 4-chip thermoluminescent phosphors enclosed in plastic - were placed at each location in a PVC conduit located approximately four to eight feet above ground level. The TLDs were exchanged quarterly and sent to Global Dosimetry for analysis.

B.

Sample Analysis This section describes the general analytical methodologies used by TBE and Environmental Inc. (Midwest Labs) to analyze the environmental samples for radioactivity for the ZNPS 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 public water and air particulates.

2.

Concentrations of gamma emitters in public water, air particulates, fish and sediment.

3.

Concentrations of tritium in public water.

4.

Ambient gamma radiation levels at various site environs.

C.

Data Interpretation The radiological and direct radiation data collected prior to Zion Nuclear Power Station becoming operational were used as a baseline with which these operational data were compared. For the purpose of this report, Zion Nuclear Power 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 ZNPS detection capabilities for environmental sample analysis.

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

2.

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

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

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

For sediment nine nuclides, Mn-54, Co-58, Fe-59, Co-60, Zn-95, Nb/Zr-95, Cs-1 34, Cs-1 37 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.

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

D.

Program Exceptions For 2006 the ZNPS REMP had a sample recovery rate in excess of 99%.

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

Table D-1 LISTING OF SAMPLE ANOMALIES Sample Location Collection Reason Type Code Date There were no anomalies for 2006.

Table D-2 LISTING OF MISSED SAMPLES Sample Location Collection Reason Type Code Date AP Z-03 08/31/06 AP was lost between sample collection and receipt at the laboratory.

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.

E.

Program Changes There were no changes to the normal REMP program in 2006. 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

1.

Public Water Samples were taken weekly and composited monthly at four locations (Z-14, Z-15, Z-16 and Z-18). The following analyses were performed.

Gross Beta Samples from all locations were analyzed for concentrations of gross beta (Table C-1.1, Appendix C). The values ranged from 2.0 pCi/I to 5.5 pCi/I. Concentrations detected were consistent with those detected in previous years (Figures C-1 and C-2, Appendix C).

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

<154 pCi/I to <187 pCi/I. Concentrations detected were consistent with those detected in previous years (Figures C-3 and C-4, Appendix C).

Gamma Spectrometry Samples from both locations were analyzed for gamma emitting nuclides (Table C-1.3, Appendix C). No nuclides were detected and all required LLDs were met.

2.

Fish Fish samples comprised of lake trout, coho salmon, burbot and longnose sucker were collected at two locations (Z-26 and Z-27) semiannually. The following analysis was performed:

Gamma Spectrometry The edible portion of fish samples from both locations was analyzed for gamma emitting nuclides (Table C-11.1, Appendix C).

Cesium-137 was detected in three samples. The values ranged from 59 to 144 pCi/kg wet. No other nuclides were detected and all required LLDs were met.

3.

Sediment Aquatic sediment samples were collected at one location (Z-25) semiannually. The following analysis was performed:

Gamma Spectrometry.

Sediment samples from Z-25 were analyzed for gamma emitting nuclides (Table C-111.1, Appendix C). No nuclides were detected and all required LLDs were met.

B.

Atmospheric Environment

1.

Airborne

a.

Air Particulates Continuous air particulate samples were collected from three locations on a weekly basis. The three locations were within the ZNPS site boundary (Z-01, Z-02 and Z-03). The following analyses were performed:

Gross Reta Weekly samples were analyzed for concentrations of beta emitters (Table C-IV.1 and C-IV.2, Appendix C).

Detectable gross beta activity was observed at all locations.

Comparison of results among the three groups aid in determining the effects, if any, resulting from the operation of ZNPS. The results from the On-Site locations ranged from

<4 E-3 pCi/m 3 to 40 E-3 pCi/m 3 with a mean of 17 E-3 pCi/m 3. Comparison of the 2006 air particulate data with previous years data indicate no effects from the operation of ZNPS. Concentrations detected were consistent with those detected in previous years.

Gamma Spectrometry.

Weekly samples were composited quarterly and analyzed for gamma emitting nuclides (Table C-IV.3, Appendix C). No nuclides were detected and all required LLDs were met.

C.

Ambient Gamma Radiation Ambient gamma radiation levels were measured utilizing Harshaw (CaF and LiF) thermoluminescent dosimeters. Thirty-six TLD locations were established around the site. Results of TLD measurements are listed in Tables C-V.1 to C-V.3, Appendix C.

Most TLD measurements were below 25 mR/quarter, with a range of 15.0 mR/quarter to 27.0 mR/quarter.

D.

Land Use Survey A Land Use Survey conducted during August 2006 around the Zion Nuclear Power Station (ZNPS) was performed by Environmental Inc.

(Midwest Labs) for Exelon Nuclear to comply with Chapter 3 of the Zion' 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 2 degree sectors around the site. There were no changes required to the ZNPS REMP, as a result of this survey. The results of this survey are summarized below.

Distance in Miles from the ZNPS Reactor Buildingis Sector Residence Livestock Milk Farm Miles Miles Miles AN 2.5 B NNE C NE D ENE EE F ESE G SE H SSE JS K SSW L SW M WSW NW P WNW Q NW R NNW 1.9 1.1 1.0 1.1 1.0 1.0 1.3 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 for (Appendix D). The PE samples, supplied by Analytics Inc.,

Environmental Resource Associates (ERA) and DOE's Mixed Analyte Performance Evaluation Program (MAPEP), were evaluated against the following pre-set acceptance criteria:

1.

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

2.

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

3.

DOE Evaluation Criteria MAPEP's evaluation report provides an acceptance range with associated flag values.

The MAPEP defines three levels of performance: Acceptable (flag =

"A"), Acceptable with Warning (flag = "W'), and Not Acceptable (flag = "N"). Performance is considered acceptable when a mean result for the specified analyte is +/- 20% of the reference value.

Performance is acceptable with warning when a mean result falls in the range from +/-20% to +/-30% of the reference value (i.e., 20% <

bias < 30%). If the bias is greater than 30%, the results are deemed not acceptable.

For the 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-1 34 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 plutonium 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 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.

APPENDIX A RADIOLOGICAL ENVIRONMENTAL MONITORING.

REPORT QUARTERLY AND ANNUAL

SUMMARY

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 1ST QUARTER

SUMMARY

FOR THE ZION NUCLEAR POWER STATION, 2006 Name of Facility:

ZION NUCLEAR POWER STATION DOCKET NUMBER:

50-295 & 50-304 Location of Facility: ZION, IL REPORTING PERIOD:

1ST QUARTER 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

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

MEAN(M)

STATION #

NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F)

(F)

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

(LLD)

MEASUREMENTS PUBLIC WATER (PCI/L)

GR-B 12 4

2.5 (6/6)

(2.3/2.9) 200 180 (0/2)

(<175/<185) 2.7 (6/6)

(2.2/3.2) 187 (0/2)

(<186/<187)

H-3 GAMMA MN-54 12 15 3

(0/6)

(<1/<5)

CO-58 FE-59 CO-60 ZN-65 15 3

(0/6)

(<1/<5)

N/A 7

(0/6)

(<3/<11) 15 3.

(0/6)

(<1/<6) 30 7

(0/6)

(<3/<12) 3 (0/6)

(<1/<5) 3 (0/6)

(< 1/<6) 7 (0/6)

(<3/<13) 3 (0/6)

(< 1/<6) 7 (0/6)

(<3/< 13) 2.8 (3/3)

(2.4/3.2) 187 (0/1)

(<187) 3 (0/3)

(<2/<5) 4 (0/3)

(<3/<6) 8 (0/3)

(<6/<13) 3 (0/3)

(<2/<6) 8 (0/3)

(<51<13)

Z-18 CONTROL LAKE FOREST WATER WORKS 12.9 MILES S OF SITE Z-18 CONTROL LAKE FOREST WATER WORKS 12.9 MILES S OF SITE Z-14 CONTROL KENOSHA WATER WORKS 10.0 MILES N OF SITE Z-14 CONTROL KENOSHA WATER WORKS 10.0 MILES N OF SITE Z-14 CONTROL KENOSHA WATER WORKS 10.0 MILES N OF SITE Z-14 CONTROL KENOSHA WATER WORKS 10.0 MILES N OF SITE Z-14 CONTROL KENOSHA WATER WORKS 10.0 MILES N OF SITE 0

0 0

ZRNB-95 15 3

3 4

Z-14 CONTROL (0/6)""

(0/6)

(0/3)

KENOSHA WATER WORKS THE MEAN AND 2 STANDARD DEVIATION VALUES AR L

CAPCULATEDUA'Ir BOTH THI1MAs AND TWAWIEOAuTs FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 1ST QUARTER

SUMMARY

FOR THE ZION NUCLEAR POWER STATION, 2006 Name of Facility:

ZION NUCLEAR POWER STATION DOCKET NUMBER:

50-295 & 50-304 Location of Facility: ZION, IL REPORTING PERIOD:

1ST QUARTER 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

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

MEAN(M)

STATION #

NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F)

(F)

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

(LLD)

MEASUREMENTS PUBLIC WATER (PCIIL)

CS-134 CS-137 BALA140 AIR PARTICULATE (E-3 PCI/CU.METER)

GR-B 39 15 3

(0/6)

(<1/<6) 18 3

(0/6)

(<1/<5)

N/A 9

(0/6)

(<5/<14) 10 15 (39/39)

(6/23)

N/A 5.8 (0/3)

(< 5.4/< 6.1)

N/A 9.1 (0/3)

(< 83/< 9.7)

N/A 27.3 (0/3)

(<21:5/<38.8) 3 (0/6)

(<1/<6) 3 (0/6)

(<1/<6) 9 (0/6)

(<5/<14)

N/A N/A N/A N/A 4

(0/3)

(<2/<6) 4 (0/3)

(<2/<6) 10 (0/3)

(<81<14) 16 (13/13)

(8/21) 6.1 (0/1)

(< 6. 1) 9.7 (0/1)

(< 9.7) 38.8 (0/1)

(<38.8)

Z-14 CONTROL KENOSHA WATER WORKS 10.0 MILES N OF SITE Z-14 CONTROL KENOSHA WATER WORKS 10.0 MILES N OF SITE Z-14 CONTROL KENOSHA WATER WORKS 10.0 MILES N OF SITE Z-03 INDICATOR ONSITE 3 0.2 MILES NNW OF SITE Z-02 INDICATOR ONSITE 2 0.2 MILES W OF SITE Z-02 INDICATOR ONSITE 2 0.2 MILES W OF SITE Z-01 INDICATOR ONSITE 1 0.3 MILES S OF SITE 0

0 0

0 GAMMviA MN-54 CO-58 FE-59 0

0 0

0 CO-60 N/A 4.6 N/A 5.8 Z-03 INDICATOR (0/3)

(0/1)

ONSITE 3 THE MEAN AND 2 STANDARD DEVIATION VALUES AR(EýUtC 5 ATED USING BOTH TIMIE546As AND TA IýWVR1IL FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 1ST QUARTER

SUMMARY

FOR THE ZION NUCLEAR POWER STATION, 2006 Name of Facility:

ZION NUCLEAR POWER STATION DOCKET NUMBER:

50-295 & 50-304 Location of Facility: ZION, IL REPORTING PERIOD:

1ST QUARTER 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN (M)

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

MEAN(M)

STATION #

NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F)

(F)

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

(LLD)

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

ZN-65 ZRNB-95 CS-134 CS-137 N/A 20.6 (0/3)

(<16.6/<27.4)

N/A 10.5 (0/3)

(<8.71<11.9) 10 7.6 (0/3)

(< 6.7/< 8.3) 10 4.9 (0/3)

(< 4.0/< 5.8)

N/A 301 (0/3)

(<223/<447)

N/A N/A N/A N/A N/A N/A 27.4 (0/1)

(<27.4) 11.9 (0/1)

(<11.9) 8.3 (0/1)

(< 8.3) 5.8 (0/1)

(< 5.8) 447 (0/1)

(<447) 25 (1/1)

(25)

Z-0 1 INDICATOR ONSITE 1 0.3 MILES S OF SITE Z-0 I INDICATOR ONSITE 1 0.3 MILES S OF SITE Z-0 1 INDICATOR ONSITE 1 0.3 MILES S OF SITE Z-01 INDICATOR ONSITE 1 0.3 MILES S OF SITE Z-03 INDICATOR ONSITE 3 0.2 MILES NNW OF SITE Z-110-1 INDICATOR*

0.2 MILES SSW OF SITE BALA140 0

0 0

DIRECT RADIATION (MILLI-ROENTGEN/QTR.)

TLD-QUARTERLY 36 N/A 22 (36/36)

,(19/25)

Z-301-2 also read 25 mreim

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 ZION NUCLEAR POWER STATION, 2006 Name of Facility:

ZION DOCKET NUMBER:

50-295 & 50-304 Location of Facility: ZION, IL REPORTING PERIOD:

2ND QUARTER 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN(M)

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

MEAN(M)

STATION #

NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F)

(F)

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

(LLD)

MEASUREMENTS PUBLIC WATER (PCI/L)

GR-B 12 H-3 4

GAMMA MN-54 12 CO-58 FE-59 CO-60 ZN-65 4

3.6.

(5/6)

(< 2.5/5.3) 200 173 (0/2)

(<173/<173) 15 2

(0/6)

(<1/<3) 15 3

(0/6)

(<1/<4)

N/A 6

(0/6)

(<4/<9) 15 2

(0/6)

(<11<3) 30 5

(0/6)

(<3/<7) 2 (0/6)

(<21<3) 3 (0/6)

(<2/<3) 6 (0/6)

(<4/<7) 2 (0/6)

(<2/<2) 5 (0/6)

(<4/<6) 3.0 (5/6)

(< 2.2/3.5) 172 (0/2)

(<171/<172) 4.3 (3/3)

(3.3/5.3) 173 (0/1)

(<173) 2 (0/3)

(<2/<2) 3 (0/3)

(<3/<3) 6 (0/3)

(<61<7) 2 (0/3)

(<2/<2) 5 (0/3)

(<51<6)

Z-16 INDICATOR WAUKEGAN WATER WORKS 6.1 MILES S OF SITE Z-15 INDICATOR LAKE COUNTY WATER WORKS 1.4 MILES NNW OF SITE Z-18 CONTROL LAKE FOREST WATER WORKS 12.9 MILES S OF SITE Z-18 CONTROL LAKE FOREST WATER WORKS 12.9 MILES S OF SITE Z-18 CONTROL LAKE FOREST WATER WORKS 12.9 MILES S OF SITE Z-18 CONTROL LAKE FOREST WATER WORKS 12.9 MILES S OF SITE Z-18 CONTROL LAKE FOREST WATER WORKS 12.9 MILES S OF SITE 0

0 0

0 ZRNB-95 15 3

3 3

Z-18 CONTROL (0/6)

(0/6)

(0/3)

LAKE FOREST WATER WORKS THE MEAN AND 2 STANDARD DEVIATION VALUES ARý 'ACULATED U2*1*

BOTH TWI'1AS AND T'1FI'ITS FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 2ND QUARTER

SUMMARY

FOR TLE ZION NUCLEAR POWER STATION, 2006 Name of Facility:

ZION DOCKET NUMBER:

50-295 & 50-304 Location of Facility: ZION, IL REPORTING PERIOD:

2ND QUARTER 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN(M)

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

MEAN(M)

STATION #

NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F)

(F)

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

(LLD)

MEASUREMENTS PUBLIC WATER (PCI/L)

CS-134 CS-137 BALA140 GAMMA MN-54 FISH (PCI/KG WET) 15 2

(0/6)

(<11<3) 18 2

(0/6)

(<1/<3)

N/A 8

(0/6)

(<5/<14) 130 72 (0/3)

(<58/<89) 130 99 (0/3)

(<85/<109) 260

.239 (0/3)

(<225/<255) 130 71 (0/3)

(<60/<87) 2 (0/6)

(<2/<3) 2 (0/6)

(<2/<3) 9 (0/6)

(<5/<12)

N/A N/A N/A N/A N/A 2

(0/3)

(<2/<3) 2 (0/3)

(<2/<2) 9 (0/3)

(<8/<12) 73 (0/2)

(<58/<89) 103 (0/1)

(<103) 240 (0/2)

(<225/<255) 74 (0/2)

(<60/<87)

Z-15 INDICATOR LAKE COUNTY WATER WORKS 1.4 MILES NNW OF SITE Z-18 CONTROL LAKE FOREST WATER WORKS 12.9 MILES S OF SITE Z-18 CONTROL LAKE FOREST WATER WORKS 12.9 MILES S OF SITE Z-27 INDICATOR LAKE MICHIGAN FARSITE 10.1 MILES N OF SITE Z-26 INDICATOR LAKE MICHIGAN NEARSITE AT STATION Z-27 INDICATOR LAKE MICHIGAN FARSITE 10.1 MILES N OF SITE Z-27 INDICATOR LAKE MICHIGAN FARSITE 10.1 MILES N OF SITE Z-26 INDICATOR LAKE MICHIGAN NEARSITE CO-58 FE-59 CO-60 ZN-65 260 183 (0/3) 198 (0/1)

THE MEAN AND 2 STANDARD DEVIATION VALUES AR

<L* )41PATED USING BOTH T"IE6As AND ATMp M"E 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 ZION NUCLEAR POWER STATION, 2006 Name of Facility:

ZION DOCKET NUMBER:

50-295 & 50-304 Location of Facility: ZION, IL REPORTING PERIOD:

2ND QUARTER 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN(M)

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

MEAN(M)

STATION #

NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F)

(F)

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

(LLD)

MEASUREMENTS FISH (PCI/KG WET)

ZRNB-95 CS-134 CS-137 BALA140 GAMMvfA MN-54 N/A 98 (0/3)

(<87/<114) 130 83 (0/3)

(<72/<91) 150 97 (2/3)

(71/144)

N/A 513 (0/3)

(<474/<538)

N/A 91 (0/1)

(<91)

N/A 121 (0/1)..,

(<121)

N/A 309 (0/1)

(<309)

N/A N/A N/A N/A N/A N/A N/A 101 (0/2)

(<87/<114) 91 (0/1)

(<91) 108 (2/2)

(71/144) 538 (0/1)

(<538) 91 (0/1)

(<91) 121 (0/1)

(<121) 309 (0/1)

(<309)

Z-27 INDICATOR LAKE MICHIGAN FARSITE 10.1 MILES N OF SITE Z-26 INDICATOR LAKE MICHIGAN NEARSITE AT STATION Z-27 INDICATOR LAKE MICHIGAN FARSITE 10.1 MILES N OF SITE Z-26 INDICATOR LAKE MICHIGAN NEARSITE AT STATION 0

0 0

0 SEDIMENT (PCI/KG DRY)

CO-58 FE-59 Z-25 INDICATOR 0

LAKE MICHIGAN - ILLINOIS BEACH STATE PRK 0.2 MILES S OF SITE Z-25 INDICATOR 0

LAKE MICHIGAN - ILLINOIS BEACH STATE PRK 0.2 MILES S OF SITE CO-60 N/A 66 N/A 66 Z-25 INDICATOR 0

(0/1)

LAKE MICHIGAN - ILLINOIS BEACH STATE PRK

THE MEAN AND 2 STANDARD DEVIATION VALUES ARM(E

-,LCULATED USING BOTH TI"IW DAS AND TMEMFLES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 2ND QUARTER

SUMMARY

FOR THE ZION NUCLEAR POWER STATION, 2006 Name of Facility:

ZION DOCKET NUMBER:

50-295 & 50-304 Location of Facility: ZION, IL REPORTING PERIOD:

2ND QUARTER 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN(M)

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

MEAN(M)

STATION #

NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F)

(F)

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

(LLD)

MEASUREMENTS SEDIMENT (PCI/KG DRY)

ZN-65 ZRNB-95 CS-134 CS-137 N/A 239 (0/1)

(<239)

N/A 151 (0/1)

(<151) 150 133 (0/1)

(<133) 180 115 (0/1)

(<115)

N/A 694 (0/1)

(<694) 10 12 (35/39)

(<4/18)

N/A 2.8 (0/3)

(< 2.7/< 3.1)

N/A N/A N/A N/A N/A N/A 239 (0/1)

(<239) 151 (0/1)

(<151) 133 (0/1)

(<133) 115 (0/1)

(<115) 694 (0/1)

(<694) 12 (12/13)

(<5/18) 3.1 (0/1)

(< 3.1)

Z-25 INDICATOR 0

LAKE MICHIGAN - ILLINOIS BEACH STATE PRK 0.2 MILES S OF SITE Z-25 INDICATOR 0

LAKE MICHIGAN - ILLINOIS BEACH STATE PRK 0.2 MILES S OF SITE BALA140 AIR PARTICULATE (E-3 PCI/CU.METER)

GR-B 39 Z-0 1 INDICATOR ONSITE 1 0.3 MILES S OF SITE Z-03 INDICATOR ONSITE 3 0.2 MILES NNW OF SITE 0

GAMMvtA MN-54 3

N/A CO-58 N/A 4.0 N/A 4.5 Z-01 INDICATOR (0/3)

(0/1)

ONSITE 1

THE MEAN AND 2 STANDARD DEVIATION VALUES ARý./C45.ATED USING BOTH TM E4.bAs AND T*T-**TAbES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 2ND QUARTER

SUMMARY

FOR THE ZION NUCLEAR POWER STATION, 2006 Name of Facility:

ZION DOCKET NUMBER:

50-295 & 50-304 Location of Facility: ZION, IL REPORTING PERIOD:

2ND QUARTER 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN(M)

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

MEAN(M)

STATION #

NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F)

(F)

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

(LLD)

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

FE-59 CO-60 ZN-65 ZRNB-95 N/A 11.7 (0/3)

(< 8.91<13.4)

N/A 26 (0/3)

(< 2.4/< 3.0)

N/A 8.7 (0/3)

(< 7.9/< 9.8)

N/A 4.4 (0/3).

(< 2.6/< 5.8) 10 3.3 (0/3)

(< 2.7/< 3.7) 10 2.5 (0/3)

(< 2.21< 2.9)

N/A 98.9 (0/3)

(<70.8/<126)

N/A 21 (36/36)

(18/26).

N/A N/A N/A N/A N/A N/A N/A N/A 13.4 (0/1)

(<13.4) 3.0 (0/1)

(< 3.0) 9.8 (0/1)

(< 9.8) 5.8 (0/1)

(< 5.8) 3.7 (0/1)

(< 3.7) 2.9 (0/1)

(< 2.9) 126 (0/1)

(<126)

Z-02 INDICATOR ONSITE 2 0.2 MILES W OF SITE Z-02 INDICATOR ONSITE 2 0.2 MILES W OF SITE Z-02 INDICATOR ONSITE 2 0.2 MILES W OF SITE Z-02 INDICATOR ONSITE 2 0.2 MILES W OF SITE Z-03 INDICATOR ONSITE 3 0.2 MILES NNW OF SITE Z-02 INDICATOR ONSITE 2 0.2 MILES W OF SITE Z-02 INDICATOR ONSITE 2 0.2 MILES W OF SITE Z-1 15-2 INDICATOR 0.4 MILES NW OF SITE 0

0 0

0 CS-134 CS-137 BALA140 DIRECT RADIATION (MILLI-ROENTGEN/QTR.)

TLD-QUARTERLY 36 26 (1/1)

(26)

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 ZION NUCLEAR POWER STATION, 2006 Name of Facility:

ZION DOCKET NUMBER:

50-295 & 50-304 Location of Facility: ZION, IL REPORTING PERIOD:

3RD QUARTER 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN(M)

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

MEAN(M)

STATION #

NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F)

(F)

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

(LLD)

MEASUREMENTS PUBLIC WATER (PCI/L)

GR-B 12 H-3 4

GAMMA MN-54 12 CO-58 FE-59 CO-60 ZN-65 4

2.7 (4/6)

(< 2.1/3.6) 200 165 (0/2)

(<154/<175) 15 1

(0/6)

(<1/<2) 15 2

(0/6)

(<i/<2)

N/A 4

(0/6)

(<2/<5) 15 1

.(0/6)

(<1/<2) 30 3

(0/6)

(<2/<4) 2 (0/6)

(<1/<3) 2 (0/6)

(<1/<3) 5 (0/6)

(<4/<9) 2 (0/6)

(<1/<3) 3 (0/6)

(<2/<7) 3.1 (6/6)

(2.4/5.5) 175 (0/2)

(<172/<178) 3.7 (3/3)

(2.7/5.5) 178 (0/1)

(<178) 2 (0/3)

(<1/<3) 2 (0/3)

(<1/<3) 6 (0/3)

(<4/<9) 2 (0/3)

(<11<3) 4 (0/3)

(<2/<7)

Z-18 CONTROL LAKE FOREST WATER WORKS 12.9 MILES S OF SITE Z-14 CONTROL KENOSHA WATER WORKS 10.0 MILES N OF SITE Z-18 CONTROL LAKE FOREST WATER WORKS 12.9 MILES S OF SITE Z-18 CONTROL LAKE FOREST WATER WORKS 12.9 MILES S OF SITE Z-18 CONTROL LAKE FOREST WATER WORKS 12.9 MILES S OF SITE Z-18 CONTROL LAKE FOREST WATER WORKS 12.9 MILES S OF SITE Z-18 CONTROL LAKE FOREST WATER WORKS 12.9 MILES S OF SITE 0

0 0

ZRNB-95 15 2

2 2

Z-18 CONTROL (0/6)

(0/6)

(0/3)

LAKE FOREST WATER WORKS

</

AN<WAM THE MEAN AND 2 STANDARD DEVIATION VALUES AR' 9A*CULATED UIA BOTH TIW1MAs AND TI IF EOVLUES FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F)

TABLE A-i RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 3RD QUARTER

SUMMARY

FOR THE ZION NUCLEAR POWER STATION, 2006 Name of Facility:

ZION DOCKET NUMBER:

50-295 & 50-304 Location of Facility: ZION, IL REPORTING PERIOD:

3RD QUARTER 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN(M)

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

MEAN(M)

STATION #

NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F)

(F)

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

(LLD)

MEASUREMENTS PUBLIC WATER (PCI/L)

CS-134 CS-137 BALA140 AIR PARTICULATE (E-3 PCI/CU.METER)

GR-B 38 15 1

(0/6)

(<1/<2) 18 1

(0/6)

(<11<2)

N/A 9

(0/6)

(<5/<13) 10 19 (38/38)

(10/40)

N/A 2.1 (0/3)

(< 1.8/< 2.3)

N/A 2.9 (0/3)

(< 2.6/< 3.2)

N/A 11.8 (0/3)

(< 8.8/<14) 1 (0/6)

(<1/<3) 2 (0/6)

(< 1/<3) 10 (0/6)

(<5/<13)

N/A N/A N/A N/A 2

(0/3)

(<1/<3) 2 (0/3)

(<11<3) 11 (0/3)

(<81<13) 20 (12/12)

(13/28) 2.3 (0/1)

(< 2.3) 3.2 (0/1)

(< 3.2) 14 (0/1)

(<14)

Z-18 CONTROL LAKE FOREST WATER WORKS 12.9 MILES S OF SITE Z-18 CONTROL LAKE FOREST WATER WORKS 12.9 MILES S OF SITE Z-18 CONTROL LAKE FOREST WATER WORKS 12.9 MILES S OF SITE Z-03 INDICATOR ONSITE 3 0.2 MILES NNW OF SITE Z-03 INDICATOR ONSITE 3 0.2 MILES NNW OF SITE Z-0 1 INDICATOR ONSITE 1 0.3 MILES S OF SITE Z-02 INDICATOR ONSITE 2 0.2 MILES W OF SITE GAMMA MN-54 CO-58 FE-59 CO-60 N/A 2.4 N/A 2.6 Z-02 INDICATOR

.(0/3)

(0/1)

ONSITE 2

THE MEAN AND 2 STANDARD DEVIATION VALUES ARME-'*/LTcZATED USING BOTH TIWIE2 6As AND TMILT1S*s FRACTION OF DETECTABLE MEASUREMENTS AT SPECIFIED LOCATIONS IS INDICATED IN PARENTHESES (F) 0

TABLE A-i RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM 3RD QUARTER

SUMMARY

FOR THE ZION NUCLEAR POWER STATION, 2006 Name of Facility:

ZION DOCKET NUMBER:

50-295 & 50-304 Location of Facility: ZION, IL REPORTING PERIOD:

3RD QUARTER 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN(M)

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

MEAN(M)

STATION #

NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F)

(F)

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

(LLD)

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

ZN-65 ZRNB-95 CS-134 CS-137 N/A 5.1 (013)

(< 4.91< 5.4)

N/A 4.1 (0/3)

(< 3.5/< 5.0) 10 1.6 (0/3)

(< 1:1/< 1.9) 10 1.7 (0/3)

(< 1.61< 1.9)

N/A 166 (0/3)

(<113/<218)

N/A 18 (36/36)

(15/22)

N/A N/A N/A N/A N/A N/A 5.4 (0/1)

(< 5.4) 5.0 (0/1)

(< 5.0) 1.9 (0/1)

(< 1.9) 1.9 (0/1)

(< 1.9) 218 (0/1)

(<218)

Z-01 INDICATOR ONSITE 1 0.3 MILES S OF SITE Z-03 INDICATOR ONSITE 3 0.2 MILES NNW OF SITE Z-02 INDICATOR ONSITE 2 0.2 MILES W OF SITE Z-02 INDICATOR ONSITE 2 0.2 MILES W OF SITE Z-02 INDICATOR ONSITE 2 0.2 MILES W OF SITE Z-301-2 INDICATOR 0.5 MILES NW OF SITE 0

0 0

0 BALA140 DIRECT RADIATION (MILLI-ROENTGEN/QTR.)

TLD-QUARTERLY 36 22 (1/1)

(22)

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 TIE ZION NUCLEAR POWER STATION, 2006 Name of Facility:

ZION DOCKET NUMBER:

50-295 & 50-304 Location of Facility: ZION, IL REPORTING PERIOD:

4TH QUARTER 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN(M)

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

MEAN(M)

STATION #

NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F)

(F)

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

(LLD)

MEASUREMENTS PUBLIC WATER (PCI/L)

GR-B 12 H-3 4

GAMMA MN-54 12 CO-58 FE-59 CO-60 ZN-65 4

3.1 (4/6)

(< 2.3/ 3.7) 200 178 (0/2)

(<177/<178) 15 3

(0/6)

(<2/<4) 15 3

(0/6)

(<2/<6)

N/A 8

(0/6)

(<5/<13) 15 3

(0/6)

(<2/<5) 30 6

(0/6)

(<3/<8) 15 4

(0/6)

(<2/<5) 3 (0/6)

(<21<4) 3 (0/6)

(<2/<5) 7 (0/6)

(<4/<10) 3 (0/6)

(<21<4) 5 (0/6)

(<3/<9) 3 (0/6)

(<2/<6) 2.9 (4/6)

(2.0/4.6) 180 (0/2)

(<179/<181) 3.2 (2/3)

(< 2.2/4.6) 181 (0/1)

(<181) 3 (0/3)

(<2/<4) 4 (0/3)

(<2/<6) 9 (0/3)

(<5/<13) 3 (0/3)

(<2/<5) 6 (0/3)

(<4/<8) 4 (0/3)

(<2/<5)

Z-18 CONTROL LAKE FOREST WATER WORKS 12.9 MILES S OF SITE Z-14 CONTROL KENOSHA WATER WORKS 10.0 MILES N OF SITE Z-16 INDICATOR WAUKEGAN WATER WORKS 6.1 MILES S OF SITE Z-16 INDICATOR WAUKEGAN WATER WORKS 6.1 MILES S OF SITE Z-16 INDICATOR WAUKEGAN WATER WORKS 6.1 MILES S OF SITE Z-16 INDICATOR WAUKEGAN WATER WORKS 6.1 MILES S OF SITE Z-16 INDICATOR WAUKEGAN WATER WORKS 6.1 MILES S OF SITE Z-16 INDICATOR WAUKEGAN WATER WORKS 6.1 MILES S OF SITE 0

0 0

0 ZRNB-95 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 4TH QUARTER

SUMMARY

FOR THE ZION NUCLEAR POWER STATION, 2006 Name of Facility:

ZION DOCKET NUMBER:

50-295 & 50-304 Location of Facility: ZION, IL REPORTING PERIOD:

4TH QUARTER 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN(M)

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

MEAN(M)

STATION #

NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F)

(F)

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

(LLD)

MEASUREMENTS PUBLIC WATER (PCI/L)

CS-134 CS-137 BALA140 GAMMA MN-54 FISH (PCI/KG WET) 3 15 3

(0/6)

(<21<4) 18 3

(0/6)

(<2/<5)

N/A 10 (0/6)

(<6/<13) 130 52 (0/3)

(<35/<74) 130 69 (0/3)

(<50/<100) 260 194 (0/3)

(<133/<235) 130 46 (0/3)

(<28/<74) 260 104 (0/3)

(<69/<156) 3 (0/6)

(<2/<4) 3 (0/6)

(<2/<4) 9 (0/6)

(<5/<15) 3 (0/3)

(<2/<4) 4 (0/3)

(<2/<5) 10 (0/3)

(<8/<13)

CO-58 FE-59 CO-60 ZN-65 N/A N/A N/A N/A N/A 74 (0/1)

(<74)

Z-16 INDICATOR WAUKEGAN WATER WORKS 6.1 MILES S OF SITE Z-16 INDICATOR WAUKEGAN WATER WORKS 6.1 MILES S OF SITE Z-16 INDICATOR WAUKEGAN WATER WORKS 6.1 MILES S OF SITE Z-26 INDICATOR LAKE MICHIGAN NEARSITE AT STATION Z-26 INDICATOR LAKE MICHIGAN NEARSITE AT STATION Z-26 INDICATOR LAKE MICHIGAN NEARSITE AT STATION Z-26 INDICATOR LAKE MICHIGAN NEARSITE AT STATION Z-26 INDICATOR LAKE MICHIGAN NEARSITE AT STATION 0

100 (0/1)

(<100) 235 (0/1)

(<235) 74 (0/1)

(<74) 156 (0/1)

(<156) 0 0

0 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 4TH QUARTER

SUMMARY

FOR THE ZION NUCLEAR POWER STATION, 2006 Name of Facility:

ZION DOCKET NUMBER:

50-295 & 50-304 Location of Facility: ZION, IL REPORTING PERIOD:

4TH QUARTER 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN(M)

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

MEAN(M)

STATION #

NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F)

(F)

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

(LLD)

MEASUREMENTS FISH (PCI/KG WET)

ZRNB-95 CS-134 CS-137 BALA140 GAMMA MN-54 N/A 77 (0/3)

(<58/<102) 130 41 (0/3)

(<29/<58) 150 53 (1/3)

(<41/<60)

N/A 764 (0/3)

(<532/<1020)

N/A 34 (0/1)

(<34)

N/A 39 (0/1)

(<39)

N/A 105 (0/1)

(<105)

N/A 46 (0/1)

(<46)*

N/A N/A N/A N/A N/A N/A N/A N/A 102 (0/1)

(<102) 58 (0/1)

(<58) 60 (0/1)

(<60) 1020 (0/1)

(<1020) 34 (0/1)

(<34) 39 (0/1)

(<39) 105 (0/I)

(<105) 46 (0/1)

(<46)

Z-26 INDICATOR LAKE MICHIGAN NEARSITE AT STATION 0

SEDIMENT (PCI/KG DRY) 1 Z-26 INDICATOR 0

LAKE MICHIGAN NEARSITE AT STATION Z-26 INDICATOR 0

LAKE MICHIGAN NEARSITE AT STATION Z-25 INDICATOR 0

LAKE MICHIGAN - ILLINOIS BEACH STATE PRK 0.2 MILES S OF SITE Z-25 INDICATOR 0

LAKE MICHIGAN - ILLINOIS BEACH STATE PRK 0.2 MILES S OF SITE

Z-25 INDICATOR 0

LAKE MICHIGAN - ILLINOIS BEACH STATE PRK 0.2 MILES S OF SITE Z-25 INDICATOR 0

LAKE MICHIGAN - ILLINOIS BEACH STATE PRK 0.2 MILES S OF SITE CO-58 FE-59 CO-60

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 ZION NUCLEAR POWER STATION, 2006 Name of Facility:

ZION DOCKET NUMBER:

50-295 & 50-304 Location of Facility: ZION, IL REPORTING PERIOD:

4TH QUARTER 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN(M)

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

MEAN(M)

STATION #

NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F)

(F)

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

(LLD)

MEASUREMENTS SEDIMENT (PCI/KG DRY)

ZN-65 ZRNB-95 CS-134 CS-137 BALA140 N/A 76 (0/1)

(<76)

N/A 47 (0/1)

(<47) 150 31 (0/1)

(<31) 180 32 (0/1)

(<32)

N/A 127 (0/1)

(<127) 10 21 (42/42)

(11/33)

N/A 1.9 (0/3)

(< 1.5/< 2.2)

N/A 2.5 (0/3)

(< 1.8/< 2.8)

N/A N/A N/A N/A N/A N/A 76 (0/1)

(<76) 47 (0/1)

(<47) 31 (0/1)

(<31) 32 (0/1)

(<32) 127 (0/1)

(<127) 22 (14/14)

(11/33) 2.2 (0/1)

(< 2.2) 2.8 (0/1)

(< 2.8)

Z-25 INDICATOR 0

LAKE MICHIGAN - ILLINOIS BEACH STATE PRK 0.2 MILES S OF SITE Z-25 INDICATOR 0

LAKE MICHIGAN - ILLINOIS BEACH STATE PRK 0.2 MILES S OF SITE AIR PARTICULATE (E-3 PCI/CU.METER)

GR-B 42 GAMMA MN-54 3

N/A N/A Z-02 INDICATOR ONSITE 2 0.2 MILES W OF SITE Z-0 1 INDICATOR ONSITE 1 0.3 MILES S OF SITE Z-02 INDICATOR ONSITE 2 0.2 MILES W OF SITE 0

0 0

CO-58 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 ZION NUCLEAR POWER STATION, 2006 Name of Facility:

ZION DOCKET NUMBER:

50-295 & 50-304 Location of Facility: ZION, IL REPORTING PERIOD:

4TH QUARTER 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN(M)

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

MEAN(M)

STATION #

NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F)

(F)

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

(LLD)

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

FE-59 CO-60 ZN-65 ZRNB-95 N/A 5.1 (0/3)

(< 3.41< 6.6)

N/A 2.1 (0/3)

(< 1.8/< 2.6)

N/A 4.5 (0/3)

(< 2.7/< 5.6)

N/A 2.3 (0/3)

(< 1.5/< 2 9) 10 1.8 (0/3)

(< 1.2/< 2.2) 10 1.8 (0/3)

(< 1.2/< 2.3)

N/A

" 15 (0/3)

(<13.1/<16.2)

N/A N/A N/A N/A N/A N/A N/A N/A 6.6 (0/1)

(< 6.6) 2.6 (0/1)

(< 2.6) 5.6 (0/1)

(< 5.6) 2.9 (0/1)

(< 2.9) 2.2 (0/1)

(< 2.2) 2.3 (0/1)

(< 2.3) 16.2 (0/1)

(<16.2)

Z-02 INDICATOR ONSITE 2 0.2 MILES W OF SITE Z-01 INDICATOR ONSITE 1 0.3 MILES S OF SITE Z-0 1 INDICATOR ONSITE 1 0.3 MILES S OF SITE Z-02 INDICATOR ONSITE 2 0.2 MILES W OF SITE Z-01 INDICATOR ONSITE 1 0.3 MILES S OF SITE Z-02 INDICATOR ONSITE 2 0.2 MILES W OF SITE Z-02 INDICATOR ONSITE 2 0.2 MILES W OF SITE Z-301-2 INDICATOR 0.5 MILES NW OF SITE 0

0 CS-134 CS-137 BALA140 0

0 0

DIRECT RADIATION (vIILLI-ROENTGEN/QTR.)

TLD-QUARTERLY 36 N/A 23 :ý (36/36)

(20/27) 27 (1/1)

(27)

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 ZION NUCLER POWER STATION, 2006 Name of Facility:

ZION DOCKET NUMBER:

50-295 & 50-304 Location of Facility: ZION, IL REPORTING PERIOD:

ANNUAL 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATION #

NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F)

(F)

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

(LLD)

MEASUREMENTS PUBLIC WATER (PCI/LITER)

GR-B H-3 48 16 48 GAMMA MN-54 CO-58 FE-59 CO-60 ZN-65 4

3.0 (19/24)

(< 2.1/ 5.3) 200 174 (0/8)

(<154/<185) 15 2

(0/24)

(<1/<5) 15 3

(0/24)

(<1/<6)

N/A 6

(0/24)

(<2/<13) 15 2

(Q/24)

(<1/<6) 30 5

(0/24)

(<2/<12) 15 3

(0/24)

(<1/<5) 2.9 (21/24)

(2.0/5.5) 178 (0/8)

(<171/<187) 2 (0/24)

(<1/<5) 3 (0/24)

(<1/<6) 6 (0/24)

(<3/<13) 2 (0/24)

(<1/<6) 5 (0/24)

(<2/< 13) 3 (0/24)

(<1/<6) 2 (0/12)

(<1/<5) 3 (0/12)

(<1/<6) 6 (0/12)

(<3/<13) 2 (0/12)

(<1/<6) 5 (0/12)

(<2/<12) 3 (0/12)

(<2/<6) 3.2 (11/12)

(< 2.3/ 5.3) 179 (0/4)

(<171/<186)

Z-16 INDICATOR WAUKEGAN WATER WORKS 6.1 MILES S OF SITE Z-14 CONTROL KENOSHA WATER WORKS 10.0 MILES N OF SITE Z-14 CONTROL KENOSHA WATER WORKS 10.0 MILES N OF SITE Z-16 INDICATOR WAUKEGAN WATER WORKS 6.1 MILES S OF SITE Z-16 INDICATOR WAUKEGAN WATER WORKS 6.1 MILES S OF SITE Z-14 CONTROL KENOSHA WATER WORKS 10.0 MILES N OF SITE Z-15 INDICATOR LAKE COUNTY WATER WORKS 1.4 MILES NNW OF SITE Z-14 CONTROL KENOSHA WATER WORKS 10.0 MILES N OF SITE 0

0 0

0 ZRNB-95

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 ZION NUCLER POWER STATION, 2006 Name of Facility:

ZION DOCKET NUMBER:

50-295 & 50-304 Location of Facility: ZION, IL REPORTING PERIOD:

ANNUAL 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATION #

NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F)

(F)

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

(LLD)

MEASUREMENTS PUBLIC WATER (PCI/LITER)

CS-134 CS-137 BALA140 GAMMA MN-54 FISH (PCI/KG WET) 6 15 2

(0/24)

(<1/<6) 18 2

(0/24)

(<1/<5)

N/A 9

(0/24)

(<5/<14) 130 62 (0/6)

(<35/<89) 130 84 (0/6)

(<50/<109) 260 216 (Q/6)

(<133/<255) 130 59 (0/6)

(<28/<87) 260 144 (0/6)

(<69/<204) 2 (0/24)

(<1/<6) 2 (0/24)

(<1/<6) 9 (0/24)

(<5/<15)

CO-58 FE-59 CO-60 ZN-65 N/A N/A N/A N/A N/A 2

(0/12)

(<1/<6) 2 (0/12)

(<1/<5) 9 (0/12)

(<5/<13) 73 (0/2)

(<7 1/<74) 101 (0/2)

(<100/<103) 236 (0/2)

(<235/<236) 70 (0/2)

(<67/<74) 177 (0/2)

(<156/<198)

Z-16 INDICATOR WAUKEGAN WATER WORKS 6.1 MILES S OF SITE Z-16 INDICATOR WAUKEGAN WATER WORKS 6.1 MILES S OF SITE Z-18 CONTROL LAKE FOREST WATER WORKS 12.9 MILES S OF SITE Z-26 INDICATOR LAKE MICHIGAN NEARSITE AT STATION Z-26 INDICATOR LAKE MICHIGAN NEARSITE AT STATION Z-26 INDICATOR LAKE MICHIGAN NEARSITE AT STATION Z-26 INDICATOR LAKE MICHIGAN NEARSITE AT STATION Z-26 INDICATOR LAKE MICHIGAN NEARSITE AT STATION 0

0 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-i RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR TUE ZION NUCLER POWER STATION, 2006 Name of Facility:

ZION DOCKET NUMBER:

50-295 & 50-304 Location of Facility: ZION, IL REPORTING PERIOD:

ANNUAL 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATION #

NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F)

(F)

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

(LLD)

MEASUREMENTS FISH (PCI/KG WET)

ZRNB-95 CS-134 CS-137 BALA140 GAMMA MN-54 N/A 87 (0/6)

(<58/<114) 130 62 (0/6)

(<29/<91) 150 75*

(3/6)

(<41/144)

N/A 639 (0/6)

(<474/<1020)

N/A 63 (0/2)

(<34/<91)

N/A 80 (0/2)

(<39/<121)

N/A 207 (0/2)

(<105/<309)

N/A 56 (0/2)

(<46/<66)

N/A N/A N/A N/A N/A N/A N/A N/A 98 (0/2)

(<93/<102) 75 (0/2)

(<58/<91) 79 (3/4)

(<41/144) 779 (0/2)

(<538/<1020) 63 (0/2)

(<34/<91) 80 (0/2)

(<39/<121) 207 (0/2)

(<105/<309) 56 (0/2)

(<46/<66)

Z-26 INDICATOR LAKE MICHIGAN NEARSITE AT STATION Z-26 INDICATOR LAKE MICHIGAN NEARSITE AT STATION Z-27 INDICATOR LAKE MICHIGAN FARSITE 10.1 MILES N OF SITE Z-26 INDICATOR LAKE MICHIGAN NEARSITE AT STATION 0

0 0

0 SEDIMENT (PCI/KG DRY)

CO-58 FE-59 CO-60 Z-25 INDICATOR 0

LAKE MICHIGAN - ILLINOIS BEACH STATE PRK 0.2 MILES S OF SITE Z-25 INDICATOR 0

LAKE MICHIGAN - ILLINOIS BEACH STATE PRK 0.2 MILES S OF SITE Z-25 INDICATOR 0

LAKE MICHIGAN - ILLINOIS BEACH STATE PRK 0.2 MILES S 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)

TABLE A-1 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM ANNUAL

SUMMARY

FOR THE ZION NUCLER POWER STATION, 2006 Name of Facility:

ZION DOCKET NUMBER:

50-295 & 50-304 Location of Facility: ZION, IL REPORTING PERIOD:

ANNUAL 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATION #

NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F)

(F)

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

(LLD)

MEASUREMENTS SEDIMENT (PCI/KG DRY)

ZN-65 ZRNB-95 CS-134 CS-137 BALA140 N/A 158 (0/2)

(<76/<239)

N/A 99 (0/2)

(<47/<151) 150 82 (0/2)

(<31/<133) 180 74 (0/2)

(<32/<115)

N/A 411 (0/2)

(<127/<694) 10 17 (1:54/158)

N/A 3.1 (0/12)

(< 1. 5/< 6. 1)

N/A 4.6 (0/12)

(< 1.8/< 9.7)

N/A N/A N/A N/A N/A N/A N/A N/A 158 (0/2)

(<76/<239) 99 (0/2)

(<47/<151) 82 (0/2)

(<3 1/< 133) 74 (0/2)

(<321<115) 411 (0/2)

(<127/<694) 17 (51/52)

(<5/31) 3.2 (0/4)

(< 1. 5/< 6. 1) 4.8 (0/4)

(< 2.8/< 9.7)

Z-25 INDICATOR 0

LAKE MICHIGAN - ILLINOIS BEACH STATE PRK 0.2 MILES S OF SITE Z-25 INDICATOR 0

LAKE MICHIGAN - ILLINOIS BEACH STATE PRK 0.2 MILES S OF SITE AIR PARTICULATE (E-3 PCI/CU.METER)

GR-B 158 GAMMA MN-54 CO-58 12 Z-03 INDICATOR ONSITE 3 0.2 MILES NNW OF SITE Z-03 INDICATOR

ONSITE 3 0.2 MILES NNW OF SITE Z-02 INDICATOR ONSITE 2 0.2 MILES W OF SITE 0

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 ANNUAL

SUMMARY

FOR THE ZION NUCLER POWER STATION, 2006 Name of Faciity-:

ZION DOCKET NUMBER:

50-295 & 50-304 Location of Facility: ZION, IL REPORTING PERIOD:

ANNUAL 2006 INDICATOR CONTROL LOCATION WITH HIGHEST ANNUAL MEAN LOCATIONS LOCATION MEDIUM OR TYPES OF NUMBER OF REQUIRED MEAN MEAN MEAN STATION #

NUMBER OF PATHWAY SAMPLED ANALYSES ANALYSES LOWER LIMIT (F)

(F)

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

(LLD)

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

FE-59 CO-60 ZN-65 ZRNB-95 CS-134 CS-137 BALA140 N/A 14 (0/12)

(< 3.4/<40)

N/A 2.9 (0/12)

(< 1.8/< 5.8)

N/A 9.7 (0/12)

(< 2.7/<27)

N/A 5.3 (0/12)

(< 1.5/<12) 10 3.6 (0/12)

(< 1.1/< 8.3) 10 2.7 (0/12)

(< 1.2/< 5.8)

N/A 145 (0/12)

(<13.1/<447)

N/A 21 (144/144)

(15/27)

N/A N/A N/A N/A N/A N/A N/A N/A 16.4 (0/4)

(< 5.31<40) 3.1 (0/4)

(< 2.0/< 5.8) 11.7 (0/4)

(< 5.4/<27) 5.7 (0/4)

(< 2.9/<11) 3.6 (0/4)

(< 1.9/< 6.7) 3.0 (0/4)

(< 1.9/< 4.9) 168 (0/4)

(<13.1/<447)

Z-01 INDICATOR ONSITE 1 0.3 MILES S OF SITE Z-03 INDICATOR ONSITE 3 0.2 MILES NNW OF SITE Z-0 1 INDICATOR ONSITE 1 0.3 MILES S OF SITE Z-02 INDICATOR ONSITE 2 0.2 MILES W OF SITE Z-02 INDICATOR ONSITE 2 0.2 MILES W OF SITE Z-02 INDICATOR ONSITE 2 0.2 MILES W OF SITE Z-03 INDICATOR ONSITE 3 0.2 MILES NNW OF SITE Z-301-2 INDICATOR 0.5 MILES NW OF SITE 0

0 0

DIRECT RADIATION (MILLI-ROENTGEN/QTR.)

TLD-QUARTERLY 144 25 (4/4)

(22/27) 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)

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

& ANALYTICAL METHODS

TABLE B-i:

Radiological Environmental Monitoring Program - Sampling Locations, Distance and Direction, Zion Nuclear Power Station, 2006 Location Location Description Distance & Direction From Site A-Public Water Z-1 4 Z-1 5 Z-1 6 Z-18 Kenosha Water Works (control)

Lake County Water Works (indicator)

Waukegan Water Works (indicator)

Lake Forest Water Works (control)

B-Air Particulates Z-0 I Z-02 Z-03 C-Z-26 Z-27 Onsite 1 (indicator)

Onsite 2 (indicator)

Onsite 3 (indicator)

Lake Michigan Nearsite (indicator)

Lake Michigan Farsite (indicator)

Lake Michigan, Illinois Beach State Park (indicator) 10.0 miles N 1.4 miles NNW 6.1 miles S 12.9 miles S 0.3 miles S 0.2 miles W 0.2 miles NNW At station 10.1 miles N 0.2 miles S n3 St-diment Z-25 E.

Environmental Dosimetry - TLD Inner Ring Z-101-1 and-2 Z-102-1 and -2 Z-103-1 and -2 Z-104-1 and -2 Z-105-1 and -2 Z-106-1 and -2 Z-107-1 and -2 Z-108-1 and -2 Z-1 10-1 and -2 Z-111-1 and-2 Z-1 12-1 and -2 Z-113-1 and-2 Z-114-1 and -2 Z-1 15-1 and -2 Z-301 -1 and -2 0.2 miles N 0.2 miles NNE 0.2 miles NE 0.1 miles ENE 0.1 miles E 0.1 miles ESE 0.1 miles SE 0.1 miles SSE 0.2 miles SSW 0.3 miles SW 0.7 miles WSW 0.6 miles W 0.6 miles WNW 0.4 miles NW 0.5 miles NW 0.3 miles S 0.2 miles W 0.2 miles NNW Other Z-01-1 and -2 Z-02-1 and -2 Z-03-1 and -2 Onsite 1 (indicator)

Onsite 2 (indicator)

Onsite 3 (indicator)

B-1

TABLE B-2: Radiological Environmental Monitoring Program - Summary of Sample Collection and Analytical Methods, Zion Nuclear Power Station, 2006 Sample Analysis Sampling Method Analytical Procedure Number Medium Public Water Gamma Spectroscopy Monthly composite from TBE, TBE-2007 Gamma emitting radioisotope weekly grab samples.

analysis Env. Inc., GS-01 Determination of gamma emitters by -gamma spectroscopy Public Water Gross Beta Monthly composite from TBE, TBE-2008 Gross Alpha and/or gross beta weekly grab samples.

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

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

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

Fish Gamma Spectroscopy Semi-annual samples TBE-2007 Gamma emitting radioisotope analysis collected via electroshocking or other techniques Env. Inc., GS-01 Determination of gamma emitters by gamma spectroscopy Sediment Gamma Spectroscopy Semi-annual grab samples TBE, TBE-2007 Gamma emitting radioisotope analysis Env. Inc., GS-01 Determination of gamma emitters by gamma spectroscopy Air Gross Beta One-week composite of TBE, TBE-2008 Gross Alpha and/or gross beta Particulates continuous air sampling activity in various matrices through glass fiber filter paper Env. Inc., AP-02 Determination of gross alpha and/or gross beta in air oarticulate filters Air Gamma Spectroscopy Quarterly composite of each TBE, TBE-2007 Gamma emitting radioisotope Particulates station analysis Env. Inc., GS-01 Determination of gamma emitters by gamma spectroscopy TLD Thermoluminescence Quarterly TLDs comprised of Global Dosimetry Dosimetry two CaF 200 and two LiF 100 LiF 4-chip Harshaw elements.

B-2

0 TtD Manbring LoccatOn A Ait Sampling L~Iotbri

~~oi ~

bo TwchurRf D7 Loceue~s and Ibc ir Upp 1cm IZ4 OsitrIva.~ I Scuthside 2iO Omiitz No, 2 Wetuide V-O3_gn ic No. 3 Non~iidc Figure B-1 Inner Ring TLD Locations and Fixed Air Samplers of the Zion Nuclear Power Station, 2006 B-3

Figure B-2 Fish, Water and Sediment Locations of the Zion Nuclear Power Station, 2006 B-4

APPENDIX C DATA TABLES' PRIMARY LABORATORY

TABLE C-I.1 CONCENTRATIONS OF GROSS BETA IN PUBLIC WATER SAMPLES COLLECTED IN THE VICINITY OF ZION NUCLEAR POWER STATION, 2006 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION PERIOD JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC MEAN Z-14 2.2 + 1.5 2.9 +/- 1.6 3.0 + 1.6 3.1 +/- 1.6 2.7 +/- 1.8

< 2.2 2.4 +/- 1.6 2.7 +/- 1.5 2.7 +/- 1.5 3.4 +/- 1.3 2.0 +/- 1.4

< 2.3 2.6 +/- 0.8 Z-15 2.4 +/- 1.5 2.3 +/- 1.5 2.9 +/- 1.6 2.8 +/- 1.6

< 2.5 3.3 +/- 1.7

< 2.2 2.6 +/- 1.5

< 2.1 3.2 +/- 1.3 3.6 +/- 1.5

< 2.3 2.7 +/- 1 Z-16 2.4 +/-

2.4 +/-

2.6 +/-

4.4 +/-

3.3 +/-

5.3 +/-

3.2 +/-

3.6 +/-

2.4 +/-

3.3 +/-

3.7 +/-

< 2.3 1.5 1.5 1.6 1.7 1.8 1.9 1.7 1.6 1.6 1.3 1.5 Z-18 3.2 +/- 1.5 2.7 +/- 1.5 2.4 +/- 1.6 2.9 +/- 1.6 3.4 +/- 1.8 3.5 +/- 1.7 2.8 +/- 1.6 2.7 +/- 1.5 5.5 +/- 2.1 4.6 +/- 1.4 2.8 +/- 1.5

< 2.2 3.2 +/- 1.9 3.2 +/- 1.8 TABLE C-1.2 CONCENTRATIONS OF TRITIUM IN PUBLIC WATER SAMPLES COLLECTED IN THE VICINITY OF ZION NUCLEAR POWER STATION, 2006 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION PERIOD JAN-MAR APR-JUN JUL-SEP OCT-DEC Z-14

< 186

< 171

< 178

< 181 Z-15 Z-1 6 Z-18

< 175

< 173

< 154

< 178

< 185

< 173

< 175

< 177

< 187

< 172

< 179 MEAN 179 +/- 13 170 +/- 22 178 +/- 11 178 +/- 14

TABLE C-1.3 CONCENTRATIONS OF GAMMA EMITTERS IN PUBLIC WATER SAMPLES COLLECTED IN THE VICINITY OF ZION NUCLEAR POWER STATION, 2006 RESULTS IN UNITS OF PCI/L +/- 2 SIGMA STC COLLECTION MN-54 CO-58 FE-59 CO-60 ZN-65 ZRNB-95 CS-134 CS-137 BALA140 PERIOD Z-14 JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC

<3

<5

<2

<3

<2

<1

<2

<3

<4

<3

<6

<3

<2

<3

<2

<3

<5

<6

< 13

<6

<5

<7

<4

<5

<6

< 10

<2

<6

<2

<1

<2

<3

<4

<6

< 13

<5

<6

<4

<3

<2

<3

<5

<7

<3

<6

<3

<2

<3

<2

<3

<6

<3

<6

<2

<3

<2

<1

<2

<4

<3

<6

<2

<3

<2

<1

<2

<3

<4

<8

< 14

<9

<8

<11

<5

< 12

<8

<5

<9

<5

< 15 MEAN-2+/-2 3+/-3 6+/-5 2+/-3 5+/-5 3+/-3 2+/-3 2+/-3 9+/-7 Z-15 JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC

<3

<5

<1

<2

<3

<2

<1

<2

<3

<4

<3

<4

<2

<3

<4

<2

<1

<2

<3

<4

<7

< 11

<4

<5

<9

<4

<2

<5

<7

<9

<3

<6

<1

<2

<3

<2

<1

<2

<3

<2

<8

< 12

<3

<5

<7

<4

<3

<2

<4

<3

<8

<3

<5

<2

<3

<4

<2

<1

<2

<3

<5

<4

<5

<1

<2

<3

<2

<1

<2

<3

<4

<3

<5

<1

<2

<3

<2

<1

<2

<3

<4

<9

< 14

<5

<8

< 14

<5

< 13

<7

<8

<6

< 12 MEAN 2 +/- 2 3+/-2 6+/-5 2+/-3 5+/-6 3+/-3 2+/-3 2 +/-2 9++/-6

TABLE C-1.3 CONCENTRATIONS OF GAMMA EMITTERS tN PUBLIC WATER SAMPLES COLLECTED IN THE VICINITY OF ZION NUCLEAR POWER STATION, 2006 RESULTS IN UNITS OF PCI/L +/- 2 SIGMA STC COLLECTION PERIOD Z-16 JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC MEAN Z-18 JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC MN-54 CO-58 FE-59 CO-60 ZN-65 ZRNB-95 CS-134 CS-137 BALA140

<3

<4

<1

<2

<1

<3

<1

<2

<4

<4 2+/-2

<2

<4

<1

<2

<1

<3

<2

<4

<2

<3

<5

<1

<3

<1

<3

<2

<1

<2

<4

<6 3+/-3

<2

<4

<1

<3

<2

<1

<3

<2

<4

<2

<7

< 11

<3

<6

<4

<7

<4

<5

<9

< 13

<3

<5

<1

<2

<1

<3

<2

<1

<2

<5

<4

<6

< 11

<3

<5

<3

<6

<3

<2

<3

<4

<6

<8

<3

<5

<1

<3

<1

<3

<2

<5

<3

<6

<1

<2

<1

<3

<1

<2

<4

<3

<5

<1

<2

<1

<3

<1

<2

<4

<5

< 9

< 13

<5

<8

<6

<8

< 12

< 10

<5

<8

<9

< 13 6+/-7 2+/-2 5+/-5 3+/-3 2+/-3 2+/-3 9+/-5

<5

<9

<3

<6

<7

<6

<5

<4

<9

<4

<8

<7

<2

<5

<1

<2

<1

<3

<2

<4

<3

<5

< 10

<3

<5

<6

<3

<2

<7

<3

<9

<5

<3

<5

<1

<3

<2

<1

<4

<2

<4

<3

<2

<5

<1

<2

<3

<2

<1

<3

<2

<4

<2

<5

<1

<2

<1

<3

<2

<4

<3

<8

< 10

<5

<8

< 12

<8

< 13

<8

< 12

<8

< 11

<9 MEAN 2 +/- 2 3+/-2 6+/-4 2+/-2 5+/-5 3+/-2 2 +/- 2 2 +/- 2 9 +/- 5

TABLE C-I1.1 CONCENTRATIONS OF GAMMA EMITTERS IN FISH SAMPLES COLLECTED IN THE VICINITY OF ZION NUCLEAR POWER STATION, 2006 RESULTS IN UNITS OF PCI/KG WET +/- 2 SIGMA COLLECTION PERIOD MN-54 CO-58 FE-59 CO-60 ZN-65 ZRNB-95 CS-1 34 CS-137 BALA-140 ST'*C Z-26 Lake Trout Coho Salmon 05/17/06 10/11/06

< 71

< 74

< 103

< 100

< 236

235

67

< 74

< 198

< 156

< 93

< 102

< 91

< 58

< 77

< 60

< 538

< 1020 MEAN 73 +/- 5 101 +/-5 236 +/- 1 70 +/- 11 177 +/- 59 98 +/- 12 75 +/- 47 Z-27 Lake Trout Burbot Lake Trout Longnose Sucker 05/17/06 05/17/06 10/24/06 10/24/06

< 89

< 58

< 35

< 47

< 109

< 85

50

< 58

< 255

< 225

< 133

< 213

< 87

< 60

< 28

< 36

< 204

< 148

< 69

< 86

< 114

87

< 58

< 69

< 86

< 72

< 29

< 35 69 +/- 25 779 +/- 682 144 +/- 54

< 526 71 +/- 31

< 474 59 +/- 29

< 741

< 41

< 532 50 +/- 25 637 +/- 296 MEAN 41 +/- 17 54 +/- 10 173 +/- 113 32 +/- 12 78 +/- 24 64 +/- 15 32 +/- 7

TABLE CII1.1 CONCENTRATIONS OF GAMMA EMITTERS IN SEDIMENT SAMPLES COLLECTED IN THE VICINITY OF ZION NUCLEAR POWER STATION, 2006 RESULTS IN UNITS OF PCI/KG DRY +/- 2 SIGMA STC COLLECTION MN-54 PERIOD Z-25 05/17/06

< 91 10/18/06

< 34 MEAN 63 +/- 80 CO-58 FE-59 CO-60 ZN-65 ZRNB-95 CS-1 34 CS-137 BALA-140

< 121

< 39 80 +/- 116

309

< 105 207 +/- 288

<66

46 56 +/- 27

239

76 158 + 230

151

< 47

< 133

< 31

115

32

694

127 99 +/- 147 82 +/- 145 74 +/- 117 411 +/- 802

TABLE C-IV.1 CONCENTRATIONS OF GROSS BETA IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF ZION NUCLEAR POWER STATION, 2006 RESULTS IN UNITS OF E-3 PCI/CU METER +/- SIGMA WEEK 2

3 4

5 6

7 8

9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 MEAN z-01 13 +/-4 18 +/-4 23 +/-4 17 +/-4 9+/-4 16 +/-4 16 +/-4 20 +/-4 14 +/-4 10 +/-4 15 +/-4 15 +/-4 10 +/-4 13 +/-4 14 +/-4 14 +/-4 13 +/-4 10 +/-4 16 +/-4

<5 7+/-3 18 +/- 4 15 +/- 4 9+/-3 15 +/-4 12 +/-4 16 +/-4 11 +/-3 24 +/-5 16 +/-4 23 +/-4 22 +/-5 18 +/-4 23 +/-4 23 +/-4 10 +/-4 40 +/-6 20 +/-4 13 +/-5 14 +/-3 13 +/-4 13 +/-4 14 +/-4 16 +/-4 27 +/-5 18 +/-4 28 +/-5 25 +/-5 27 +/-4 19 +/-5 28 +/-4 24 5

25 +/-5 GROUP I Z-02 13 +/-4 13 +/-4 17 +/-4 18 +/-4 12 +/-4 14 +/-4 10 +/-4 18 +/-4 21 +/-4 8+/-3 14 +/-4 13 +/-4 6+/-3 13 +/-4 13 +/-4 11 +/-4 9+/-3 11 +/-4 11 +/-4

< 5

< 4 17 +/-4 11 +/-4 7+/-4 12+/-4 8+/-3 13 +/- 4 12 +/- 4 17 +/- 4 15 +/- 4 21 +/- 4 20 +/- 5 21 +/-4 21+/-4 22 +/-4 11 +/- 5 20 +/- 4 21 +/- 5 16 +/- 5 17 +/- 4 11 +/-4 17 +/-4 16 +/-4 15 +/-4 31 +/-6 18 +/-4 23 +/-4 24 +/- 4 33 +/- 5 19 +/-5 31 +/-4 26 +/-5 24 +/-5 Z-03 15 +/- 4 18 +/- 4 19 +/-4 14 +/-4 10 +/-4 19 +/-4 15 +/-4 21 +/-4 19 +/- 4 14 +/- 4 16 +/- 4 14 +/- 4 8+/-3 10 +/-4 16 +/-4 16 +/-4 13 +/-4 9+/-4 13 +/-4

< 5 8

18 14 10 15 15 20 13 24 22 27 17 16 28

+/-3

+/-4

+/-3

+/-4

+/-5

+/-4

+/-5 (1) 15 +/- 5 24 +/- 5 20 +/- 5 17 +/-5 19 +/-4 15 +/-4 13 +/-4 15 +/-4 15 +/-4 31 +/-6 13 +/-4 19 +/- 4 24 +/- 4 26 +/- 4 22 +/- 5 29 +/- 4 24 +/- 5 28 +/- 5 17 +/-13 16 +/-13 17 +/-12 (1) SEE PROGRAM EXCEPTIONS SECTION FOR EXPLANATION

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

TABLE C-IV.2 MONTHLY AND YEARLY MEAN VALUES OF GROSS BETA CONCENTRATIONS (E-3 PCI/CU METER) IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF ZION NUCLEAR POWER STATION, 2006 ONSITE LOCATIONS COLLECTION PERIOD MIN.

MAX.

MEAN+

2SD 12/28/05 - 02/01/06 02/01/06 - 03/01/06 03/01/06 - 03/29/06 03/29/06 - 05/03/06 05/03/06 - 05/31/06 05/31/06 - 06/28/06 06/28/06 - 08/03/06 08/03/06 - 08/31/06 08/31/06 - 09/26/06 09/26/06 - 11/02/06 11/02/06 - 11/29/06 11/29/06 - 01/03/07 12/28/05 - 01/03/07 9

10 6

9

<4 7

11 16 10 11 13 19

<4 23 21 16 16 18 15 27 28 40 19 31 33 15 7

17 7

12 7

12-+/- 4 11 +/- 11 12 6

18 + 10 21 +/-7 19 +/- 16 15 +/- 4 23 +/- 11 26 +/- 9 40 17 +/- 10

TABLE C-IV.3 CONCENTRATIONS OF GAMMA EMITTERS IN AIR PARTICULATE SAMPLES COLLECTED IN THE VICINITY OF ZION NUCLEAR POWER STATION, 2006 RESULTS IN UNITS OF E-3 PCI/CU METER +/- 2 SIGMA STC COLLECTION PERIOD MN-54 CO-58 FE-59 CO-60 ZN-65 ZRNB-95 CS-134 CS-137 BALA140 Z-01 12/28 - 03/29/06 Z-01 03/29 - 06/28/06 Z-01 06/28 - 09/26/06 Z-01 09/26 - 01/03/07 MEAN

<5

<3

<2

<8

<4

<3

< 39

<13

<9

<5

<3

<2

<3

< 27

<8

<5

<6

< 12

<3

<4

<3 3+3 5+/-5 16 +/- 30 3+/-2 12 +/- 21 5+/-9

<8

<3

<1

<2

<7

<4

<2

<2 4+/-6

<6

<2

<5

<3

<2

<2 3+/-4

< 233

< 71

< 167

< 16 122 +/- 194 Z-02 Z-02 Z-02 Z-02 Z-03 Z-03 Z-03 Z-03 12/28 03/29 06/28 09/26 12/28 03/29 06/28 09/26

- 03/29/06

- 06/28/06

- 09/26/06

- 01/03/07

<6

<3

<2

< 10

<4

<3

< 22

< 13

< 14

<7

<3

<2

< 17

< 10

<5

< 11

<6

<3

< 223

< 126

218

16 MEAN 3+/-4 5+/-7 14 +/- 12 3+/-1 9 +/- 11 6+/-7 4+/-4 3+/-3 146 +/- 194

- 03/29/06

- 06/28/06

- 09/26/06

- 01/03/07

<6

<3

<2

<1

<9

<4

<3

<2

< 22

<9

< 13

<3

<6

<2

< 18

<8

<5

<3

<9

<5

<2

<8

<4

<2

<1

<4

<2

<1

< 447

< 100

< 113

< 13 MEAN 3 +/- 4 4 +/- 7 12 +/- 15 3 +/-4 8 +/- 13 5 +/-6 4 +/- 6 2 +/- 3 168 +/- 382

TABLE C-V.1 QUARTERLY TLD RESULTS FOR ZION NUCLEAR POWER 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.

Z-01o-1 21.3 +/- 3.0 23 20 20 22 Z-01-2 20.3 +/- 5.0 23 20 17 21 Z-02-1 20.3 +/- 3.4 21 20 18 22 Z-02-2 19.0 +/- 5.7 21 19 15 21 Z-03-1 20.3 +/- 5.0 23 20 17 21 Z-03-2 19.8 +/- 4.4 22 19 17 21 Z-101-1 20.3 +/- 3.4 20 21 18 22 Z-101-2 20.0 +/- 3.3 22 20 18 20 Z-102-1 21.8 +/- 5.0 23 23 18 23 Z-1 02-2 20.5 +/- 5.3 22 20 17 23 Z-103-1 20.5 +/- 3.8 22 20 18 22 Z-103-2 20.8 +/- 5.7 21 21 17 24 Z-104-1 19.8 +/- 4.4 21 19 17 22 Z-104-2 20.0 +/- 6.3 22 19 16 23 Z-105-1 20.5 +/- 6.2 21 22 16 23 Z-105-2 20.3 +/- 3.0 21 21 18 21 Z-106-1 19.8 +/- 3.0 21 19 18 21 Z-106-2 18.3 +/- 3.4 19 18 16 20 Z-107-1 20.5 +/- 3.5 22 21 18 21 Z-107-2 20.8 +/- 5.7 21 21 17 24 Z-108-1 20.0 +/- 4.3 22 20 17 21 Z-108-2 19.8 +/- 4.1 20 22 17 20 Z-110-1 21.8 +/- 6.8 25 22 17 23 Z-1 10-2 20.3 +/- 4.4 21 22 17 21 Z-111-1 21.0 +/- 3.3 21 21 19 23 Z-111-2 21.5 +/- 5.0 22 22 18 24 Z-112-1 23.3 +/- 3.4 24 23 21 25 Z-112-2 22.5 +/- 5.0 23 23 19 25 Z-113-1 22.0 +/- 4.3 22 23 19 24 Z-113-2 21.5 +/- 3.5 22 22 19 23 Z-114-1 21.8 +/- 5.0 21 22 19 25 Z-114-2 22.5 +/- 4.2 23 22 20 25 Z-115-1 22.5 +/- 5.8 23 22 19 26 Z-115-2 24.0 +/- 4.9 23 26 21 26 Z-301-1 23.8 +/- 3.8 24 25 21 25 Z-301-2 24.5 +/- 4.2 25 24 22 27

TABLE C-V.2 MEAN QUARTERLY TLD RESULTS FOR THE INNER RING AND OTHER LOCATIONS FOR ZION NUCLEAR POWER STATION, 2006 RESULTS IN UNITS OF MILLI-ROENTGEN/QUARTER +/- 2 STANDARD DEVIATIONS OF THE STATION DATA STATION CODE INNER RING

+/- 2 S. D.

OTHER JAN-MAR APR-JUN JUL-SEP OCT-DEC 22.0

+/- 2.8 21.5 +/- 3.6 18.2

+ 3.1 23.1

+/- 3.9 22.2 +/- 2.0 19.7 +/- 1.0 17.3 +/- 3.3 21.3 +/- 1.0 TABLE C-V.3

SUMMARY

OF THE AMBIENT DOSIMETRY PROGRAM FOR ZION NUCLEAR POWER STATION, 2006 RESULTS IN UNITS OF MILLI-ROENTGEN/QUARTER LOCATION INNER RING OTHER SAMPLES ANALYZED 120 24 PERIOD MINIMUM 16 15 PERIOD MAXIMUM 27 23 PERIOD MEAN

+/-2S. D.

21.2 +/- 4.9 20.1 +/- 4.2 INNER RING STATIONS - Z-101-1, Z-101-2, Z-102-1, Z-102-2, Z-103-1, Z-103-2, Z-104-1, Z-104-2, Z-105-1, Z-105-2, Z-106-1, Z-106-2, Z-107-1, Z-107-2, Z-108-1, Z-108-2, Z-110-1, Z-110-2, Z-111-1, Z-111-2, Z-112-1, Z-112-2, Z-113-1, Z-113-2, Z-114-1, Z-114-2, Z-115-1, Z-115-2, Z-301-1, Z-302-2 OTHER STATIONS - Z-01-1, Z-01-2, Z-02-1, Z-02-2, Z-03-1, Z-03-2

TABLE C-VI.1

SUMMARY

OF COLLECTION DATES FOR SAMPLES COLLECTED IN THE VICINITY OF ZION NUCLEAR POWER STATION, 2006 PUBLIC WATER (TRITIUM LIQUID SCINTILLATION)

COLLECTION PERIOD Z-14 Z-15 Z-16 Z-18 JAN-MAR 01/04/06 - 03/29/06 01/04/06 - 03/29/06 01/04/06 - 03/29/06 01/04/06 - 03/29/06 APR-JUN 04/05/06 - 06/28/06 04/05/06 - 06/28/06 04/05/06 - 06/28/06 04/05/06 - 06/28/06 JUL-SEP 07/05/06 - 09/26/06 07/05/06 - 09/26/06 07/05/06 - 09/26/06 07/05/06 - 09/26/06 OCT-DEC 10/04/06 - 12/27/06 10/04/06 - 12/27/06 10/04/06 - 12/27/06 10/04/06 - 12/27/06 PUBLIC WATER (GROSS BETA & GAMMA SPECTROSCOPY)

COLLECTION PERIOD Z-14 Z-15 Z-16 Z-18 JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC 01/04/06 - 01/25/06 02/01/06 - 02/22/06 03/01/06 - 03/29/06 04/05/06 - 04/26/06 05/03/06 - 05/31/06 06/06/06 - 06/28/06 07/05/06 - 07/26/06 08/03/06 - 08/31/06 09/06/06 - 09/26/06 10/04/06 - 10/25/06 11/02/06 - 11/29/06 12/07/06 - 12/27/06 01/04/06 - 01/25/06 02/01/06 - 02/22/06 03/01/06 - 03/29/06 04/05/06 - 04/26/06 05/03/06 - 05/31/06 06/06/06 - 06/28/06 07/05/06 - 07/26/06 08/03/06 - 08/31/06 09/06/06 - 09/26/06 10/04/06 - 10/25/06 11/02/06 - 11/29/06 12/07/06 - 12/27/06 01/04/06 - 01/25/06 01/04/06 - 01/25/06 02/01/06 - 02/22/06 02/01/06 - 02/22/06 03/01/06 - 03/29/06 03/01/06 - 03/29/06 04/05/06 - 04/26/06 04/05/06 - 04/26/06 05/03/06 - 05/31/06 05/03/06 - 05/31/06 06/06/06 - 06/28/06 06/06/06 - 06/28/06 07/05/06 - 07/26/06 07/05/06 - 07/26/06 08/03/06 - 08/31/06 08/03/06 - 08/31/06 09/06/06 - 09/26/06 09/06/06 - 09/26/06 10/04/06 - 10/25/06 10/04/06 - 10/25/06 11/02/06 - 11/29/06 11/02/06 - 11/29/06 12/07/06 - 12/27/06 12/07/06 - 12/27/06

TABLE C-VI.1

SUMMARY

OF COLLECTION DATES FOR SAMPLES COLLECTED IN THE VICINITY OF ZION NUCLEAR POWER STATION, 2006 AIR PARTICULATE (GAMMA SPECTROSCOPY)

COLLECTION Z-01 Z-02 Z-03 PERIOD JAN-MAR 12/28/05 - 03/29/06 12/28/05 - 03/29/06 12/28/05 - 03/29/06 APR-JUN 03/29/06 - 06/28/06 03/29/06 - 06/28/06 03/29/06 - 06/28/06 JUL-SEP 06/28/06 - 09/26/06 06/28/06 - 09/26/06 06/28/06 - 09/26/06 OCT-DEC 09/26/06 - 01/03/07 09/26/06 - 01/03/07 09/26/06 - 01/03/07 AIR PARTICULATE (GROSS BETA & 1-131)

COLLECTION Z-01 Z-02 Z-03 PERIOD 2

3 4

5 6

7 8

9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 I. LO U I

I/III 01/04/06 - 01/11/06 01/11/06 - 01/18/06 01/18/06 - 01/25/06 01/25/06 - 02/01/06 02/01/06 - 02/08/06 02/08/06 - 02/15/06 02/15/06 - 02/22/06 02/22/06 - 03/01/06 03/01/06 - 03/08/06 03/08/06 - 03/15/06 03/15/06 - 03/22/06 03/22/06 - 03/29/06 03/29/06 - 04/05/06 04/05/06 - 04/12/06 04/12/06 - 04/19/06 04/19/06 - 04/26/06 04/26/06 - 05/03/06 05/03/06 - 05/10/06 05/10/06 - 05/17/06 05/17/06 - 05/24/06 05/24/06 - 05/31/06 05/31/06 - 06/06/06 06/06/06 - 06/14/06 06/14/06 - 06/21/06 06/21/06 - 06/28/06 06/28/06 - 07/05/06 07/05/06 - 07/12/06 07/12/06 - 07/19/06 07/19/06 - 07/26/06 07/26/06 - 08/03/06 08/03/06 - 08/09/06 08/09/06 - 08/16/06 08/16/06 - 08/23/06 08/23/06 - 08/31/06 08/31/06 - 09/06/06 09/06/06 - 09/13/06 09/13/06 - 09/20/06 09/20/06 - 09/26/06 09/26/06 - 10/04/06 10/04/06 - 10/11/06 10/11/06 - 10/18/06

,10/18/06 - 10/25/06 10/25/08 - 11/02/06 11/02/06 - 11/08/06 11/08/06 - 11/15/06 11/15/06 - 11/22/06 11/22/06 - 11/29/06 11/29/06 - 12/07/06 12/07/06 - 12/13/06 12/13/06 - 12/21/06 12/21/06 - 12/27/06 12/27/06 - 01/03/07 01/04IU/

- 0U1/L/06 01/04/06 - 01/11/06 01/11/06 - 01/18/06

01/18/06 - 01/25/06 01/25/06 - 02/01/06 02/01/06 - 02/08/06 02/08/06 - 02/15/06 02/15/06 - 02/22/06 02/22/06 - 03/01/06 03/01/06 - 03/08/06 03/08/06 - 03/15/06 03/15/06 - 03/22/06 03/22/06 - 03/29/06 03/29/06 - 04/05/06 04/05/06 - 04/12/06 04/12/06 - 04/19/06 04/19/06 - 04/26/06 04/26/06 - 05/03/06 05/03/06 - 05/10/06 05/10/06 - 05/17/06 05/17/06 - 05/24/06 05/24/06 - 05/31/06 05/31/06 - 06/06/06 06/06/06 - 06/14/06 06/14/06 - 06/21/06 06/21/06 - 06/28/06 06/28/06 - 07/05/06 07/05/06 - 07/12/06 07/12/06 - 07/19/06 07/19/06 - 07/26/06 07/26/06 - 08/03/06 08/03/06 - 08/09/06 08/09/06 - 08/16/06 08/16/06 - 08/23/06 08/23/06 - 08/31/06 08/31/06 - 09/06/06 09/06/06 - 09/13/06 09/13/06 - 09/20/06 09/20/06 - 09/26/06 09/26/06 - 10/04/06 10/04/06 - 10/11/06 10/11/06 - 10/18/06 10/18/06 - 10/25/06 10/25/06 - 11/02/06 11/02/06 - 11/08/06 11/08/06 - 11/15/06 11/15/06 - 11/22/06 11/22/06 - 11/29/06 11/29/06 - 12/07/06 12/07/06 - 12/13/06 12/13/06 - 12/21/06 12/21/06 - 12/27/06 12/27/06 - 01/03/07 01/i04/l 0

/11/0u 01/04/06 - 01/11/06 01/111106 - 01/18/06 01/18/06 - 01/25/06 01/25/06 - 02/01/06 02/01/06 - 02/08/06 02/08/06 - 02/15/06 02/15/06 - 02/22/06 02/22/06 - 03/01/06 03/01/06 - 03/08/06 03/08/06 - 03/15/06 03/15/06 - 03/22/06 03/22/06 - 03/29/06 03/29/06 - 04/05/06 04/05/06 - 04/12/06 04/12/06 - 04/19/06 04/19/06 - 04/26/06 04/26/06 - 05/03/06 05/03/06 - 05/10/06 05/10/06 - 05/17/06 05/17/06 - 05/24/06 05/24/06 - 05/31/06 05/31/06 - 06/06/06 06/06/06 - 06/14/06 06/14/06 - 06/21/06 06/21/06 - 06/28/06 06/28/06 - 07/05/06 07/05/06 - 07/12/06 07/12/06 - 07/19/06 07/19/06 - 07/26/06 07/26/06 - 08/03/06 08/03/06 - 08/09/06 08/09/06 - 08/16/06 08/16/06 - 08123/06 08/23/06 - 08/31/06 08/31/06 - 09/06/06 09/06/06 - 09/13/06 09/13/06 - 09/20/06 09/20/06 - 09/26/06 09/26/06 - 10/04/06 10/04/06 - 10/11/06 10/11/06 - 10/18/06 10/18/06 - 10/25/06 10/25/06 - 11/02/06 11/02/06 - 11/08/06 11/08/06 - 11/15/06 11/15/06 - 11/22/06 11/22/06 - 11/29/06 11/29/06 - 12/07/06 12/07/06 - 12/13/06 12/13/06 - 12/21/06 12/21/06 - 12/27/06 12/27/06 - 01/03/07

TABLE C-VI.1

SUMMARY

OF COLLECTION DATES FOR SAMPLES COLLECTED IN THE VICINITY OF ZION NUCLEAR POWER STATION, 2006 TILD STATION CODE 36S2 3601 2E1 3S1 4E1 5S1 51-1 6C1 7S1 7E1 9C1 10S3 1OE1 1 0F3 l~is 1 3S2 1 3C1 1 3E1 14SI 1501l 16F1 17B13 18S2 1901 20D1 20F1 21 S2 2382 24D1 25S2 2501 26S3 2802 2981 29E1 3181 31D1 310D2 34S2 34EI JAN - MAR APR - JUN JUL - SEP OCT

- DEC 01/01/06 -04/01/06 01/01/06 -04/01/06 01/01/06

-04/01/06 01/01/06

- 04/01/06 01/01/06

- 04/01/06 01/01/06 - 04/01/06 01/01/06

- 04/01/06 01/01/06

- 04/01/06 01/01/06 - 04/01/06 01/01/06 - 04/01/06 01/01/06 - 04/01/06 01/01/06 - 04/01/06 01/01/06 - 04/0.1/06 01/01/06 - 04/01/06 01/01/06 - 04/01/06 01/01/06 - 04/01/06 01/01/06

- 04/01/06 01/01/06 - 04/01/06 01/01/06 - 04/01/06 01/01/06 - 04/01/06 01/01/06 - 04/01/06 01/01/06 - 04/01/06 01/01/06 - 04/01/06 01/01/06 - 04/01/06 01/01/06 -04/01/06 01/01/06 - 04/01/06 01/01/06 - 04/01/06 01/01/06 - 04/01/06 01/01/06 - 04/01/06 01/01/06 -04/01/06 01/01/06 - 04/01/06 01/01/06 - 04/01/06 01/01/06 - 04/01/06 01/01/06

- 04/01/06 04/01/06 -07/01/06 04/01/06 -07/01/06 04/01/06

-07/01/06 04/01/06 -07/01/06 04/01/06

-07/01/06 04/01/06

-07/01/06 04/01/06 -07/01/06 04/01/06

-07/01/06 04/01/06

-07/01/06 04/01/06 -07/01/06 04/01/06

-07/01/06 04/01/06

-07/01/06 04/01/06 -07/01/06 04/01/06

-07/01/06 04/01/06

-07/01/06 04/01/06 -07/01/06 04/01/06

-07/01/06 04/01/06 -07/01/06 04/01/06 -07/01/06 04/01/06

-07/01/06 04/01/06

-07/01/06 04/01/06 -07/01/06 04/01/06 -07/01/06 04/01/06 -07/01/06 04/01/06 -07/01/06 04/01/06

-07/01/06 04/01/06 -07/01/06 04/01/06 -07/01/06 04/01/06 -07/01/06 04/01/06

-07/01/06 07/01/06

-10/01/06 07/01/06

-10/01/06 07/01/06 -10/01/06 07/01/06

-10/01/06 07/01/06

-10/01/06 07/01/06 -

10/01/06 07/01/06 -

10/01/06 07/01/06 - 10/01/06 07/01/06

- 10/01/06 07/01/06

- 10/01/06 07/01/06 - 10/01/06 07/01/06

- 10/01/06 07/01/06

- 10/01/06 07/01/06 - 10/01/06 07/01/06 - 10/01/06 07/01/06

- 10/01/06 07/01/06 -

10/01/06 07/01/06 -

10/01/06 07/01/06 - 10/01/06 07/01/06 - 10/01/06 07/01/06 -

10/01/06 07/01/06 -

10/01/06 07/01/06 - 10/01/06 07/01/06 -

10/01/06 07/01/06 -

10/01/06 07/01/06 - 10/01/06 07/01/06 -

10/01/06 07/01/06 -

10/01/06 07101/06 - 10/01/06 10/01/06

-01/01/07 10/01/06 -01/01/07 10/01/06 -01/01/07 10/01/06

-01/01/07 10/01/06

-01/01/07 10/01/06 -01/01/07 10/01/06

-01/01/07 10/01/06 -01/01/07 10/01/06 -01/01/07 10/01/06

-01/01/07 10/01/06

-01/01/07 10/01/06 -01/01/07 10/01/06 -01/01/07 10/01/06

-01/01/07 10/01/06

-01/01/07 10/01/06 -01/01/07 10/01/06 -01/01/07 10/01/06

-01/01/07 10/01/06 -01/01/07 10/01/06

-01/01/07 10/01/06

-01/01/07 10/01/06 -01/01/07 10/01/06 -01/01/07 10/01/06 -01/01/07 10/01/06

-01/01/07 10/01/06 -01/01/07 10/01/06 -01/01/07 10/01/06 -01/01/07 10/01/06 -01/01/07 10/01/06

-01/01/07 10/01/06

-01/01/07 10/01/06 -01/01/07 10/01/06 -01/01/07 10/01/06

-01/01/07

FIGURE C-1 PUBLIC WATER - GROSS BETA - STATIONS Z-14 AND Z-15 COLLECTED IN THE VICINITY OF ZNPS, 2000-2004 7Z-14 Kenosha Water Works

'Io0 04 -ý

-3 2-0 w 01 -01 I

I HcM 12-31-00 12-31,01 t2-31Z2 I

12-31-W3 12-30-04 Z-1 5 Lake Couinty Water Works 10-0o C.

44, O.D 1241-03 Q-314n 12ý31,-W 12-30-04

FIGURE C-1 (cont.)

PUBLIC WATER - GROSS BETA - STATIONS Z-14 AND Z-15 COLLECTED IN THE VICINITY OF ZNPS, 2005 - 2006 Z-14 (C) Kenosha Water Works 5.0.

4.0, 3.0.

2.0.

1.0.

0 0-ý

,J 0.0 4-01/01/05 07/02/05 12/31/05 07/01/06 12/30/06 Z-15 Lake County Water Works 5.0-4.0 1 3.0+

0

-J C.)

0.

2.0 -

1.0 4 u-u.

I 01/01/05 07/02/05 12/31/05 07/01/06 12/30/06 DUE TO VENDOR CHANGE IN 2005, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE 2005 AND MDC VALUES AFTER JUNE 2005

FIGURE C-2 PUBLIC WATER - GROSS BETA - STATIONS Z-16 AND Z-18 COLLECTED IN THE VICINITY OF ZNPS, 2000 - 2004 ZAi6 Waukegan Water Works 4,0 ot-M.M.

12ýý3140 IZal,03 l2a0604 Z-18 Lake Forest Water Works 9L 2

12-3 I-cil

ýZ31-01 1-Zi3l,02 124,OwW

FIGURE C-2 (cont.)

PUBLIC WATER - GROSS BETA - STATIONS Z-16 AND Z-18 COLLECTED IN THE VICINITY OF ZNPS, 2005 - 2006 Z-16 Waukegan Water Works 6.0 a.

01-01-05 07-02-05 12-31-05 07-01-06 12-30-06 Z-1 8 (C) Lake Forest Water Works 6.0

.J a.

01-01-05 07-02-05 12-31-05 07-01-06 12-30-06 DUE TO VENDOR CHANGE IN 2005, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE 2005 AND MDC VALUES AFTER JUNE 2005

FIGURE C-3 PUBLIC WATER - TRITIUM - STATION Z-14 AND Z-15 COLLECTED IN THE VICINITY OF ZNPS, 2000 - 2004 Z-14 (C) Kenosha Water Worlks 400i 2001

-j I

01 1~Q12-3~Q1~4t; 12441-02 12421,03 1~ 12K004 Z-15 Lake County Water Works 500 S

400 100 100-

FIGURE C-3 (cont.)

PUBLIC WATER - TRITIUM - STATION Z-14 AND Z-15 COLLECTED IN THE VICINITY OF ZNPS, 2005 - 2006 Z-14 (C) Kenosha Water Works 300 -

200 4 0

-J003 100-U *I*

I I

I 03-31-05 09-30-05 03-29-06 09-26-06 01-03-07 300- 7 Z-15 Lake County Water Works 250 4-200 +

-J C.)a.

150+

100+

50-0 I

I I

l I

I I

03/31/05 06130/05 09/30/05 12/31/05 03/29/06 06/28/06 09/26/06 12/27/06 01/03/07 DUE TO VENDOR CHANGE IN 2005, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE 2005 AND MDC VALUES AFTER JUNE 2005

FIGURE C-4 PUBLIC WATER - TRITIUM - STATION Z-16 AND Z-18 COLLECTED IN THE VICINITY OF ZNPS, 2000 - 2004 Z-1 6 Waukegan Water Works 500 4W~

3001 200 9m 100 0

-100 4 W-140I-D i2-3~.oa ia~i~ai 1~DQ4m4 Z-18 (C) Lake Forest Water Works 300 -

200

-20G 01-01-00 1-34 1Z-31-O1

$2 1

31'.

I Z-W-041

FIGURE C-4 (cont.)

PUBLIC WATER - TRITIUM - STATION Z-16 AND Z-18 COLLECTED IN THE VICINITY OF ZNPS, 2005 - 2006 Z-16 Waukegan Water Works 250 -

200 -

0 150+

-J C) 100+

50+

0 03/31/05 06/30/05 09/30/05 12/31/05 03/29/06 06/28/06 09/26/06 12/27/06 01/03/07 Z-18 (C) Lake Forest Water Works 250,-

200-I 0

150+

-J C) 100+

50-0 03/31/05 06/30/05 09/30/05 12/31/05 03/29/06 06/28/06 09/26/06 12/27/06 01/03/07 DUE TO VENDOR CHANGE IN 2005, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE 2005 AND MDC VALUES AFTER JUNE 2005

FIGURE C-5 AIR PARTICULATES - GROSS BETA - STATIONS Z-01 AND Z-02 COLLECTED IN THE VICINITY OF ZNPS, 2000 - 2004 Z-0 Onsite No. 1., Southside Ua' qILJ 4.0~

2,0

'0.0-01-01-CO 12310 12-31,01

-Z 02 12-31 0 12-30104 Z-02 Onsite No. 2, Westside E

4.v ab I 12,1044

FIGURE C-5 (cont.)

AIR PARTICULATES - GROSS BETA - STATIONS Z-01 AND Z-02 COLLECTED IN THE VICINITY OF ZNPS, 2005 - 2006 Z-01 Onsite No. 1, Southside 50.0 40.0 30.0 0.

20.0 10.0 01/05/05 07/06/05 01/04/06 07/05/06 01/03/07 Z-02 Onsite No. 2, Westside 0o CLl coa 50.0 40.0 30.0 20.0 10.0 0.0 -

01-05-05 07-06-05 01-04-06 07-05-06 01-03-07 DUE TO VENDOR CHANGE IN 2005, < VALUES ARE LLD VALUES JANUARY THROUGH JUNE 2005 AND MDC VALUES AFTER JUNE 2005

FIGURE C-6 AIR PARTICULATES - GROSS BETA - STATIONS Z-03 COLLECTED IN THE VICINITY OF ZNPS, 2000 - 2004 Z-03 Onsite No. 3, Northside

4.

II 0.0 1 I IOV3 1-00 1131 1

2-:142 1-3-0 144444

FIGURE C-6 (cont.)

AIR PARTICULATES - GROSS BETA - STATIONS Z-03 COLLECTED IN THE VICINITY OF ZNPS, 2005 - 2006 Z-03 Onsite No. 3, Northside 50.0 40.0 E

30.0 C-)

20.0 0

10.0.

0.0 01-05-05 07-06-05 01-04-06 07-05-06 01-03-07 DUE TO VENDOR CHANGE IN 2005, <VALUES ARE LLD VALUES JANUARY THROUGH JUNE 2005 AND MDC VALUES AFTER JUNE 2005

APPENDIX D INTER-LABORATORY COMPARISON PROGRAM

TABLE D-1 ANALYTICS ENVIRONMENTAL RADIOACTIVITY CROSS CHECK PROGRAM TELEDYNE BROWN ENGINEERING, 2006 (PAGE 1 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 E4965-396 Milk E4967-396 AP E4966-396 Charcoal Sr-89 Sr-90 1-131 Ce-141 Cr-51 Cs-134 Cs-137 Co-58 Mn-54 Fe-59 Zn-65 Co-60 Ce-141 Cr-51 Cs-134 Cs-137 Co-58 Mn-54 Fe-59 Zn-65 Co-60 1-131 pCi/L 91.5 99.2 pCi/L 12.2 10.8 pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi pCi pCi pCi pCi pCi pCi pCi pCi 74.4 95.1 278 103 87.6 93.9 90.0 83.0 178 118 89.9 253 71.5 67.5 79.7 74.9 75.5 146 91.2 78.0 104 280 121 88.8 105 93.3 86.6 176 128 74 200 86.1 63.3 74.6 67 61.8 126 91 86.2 pCi 87.4 0.92 1.13 0.95 0.91 0.99 0.85 0.99 0.89 0.96 0.96 1.01 0.92 1.21 1.27 0.83 1.07 1.07 1.12 1.22 1.16 1.00 1.01 0.91 0.95 0.79 0.95 1.03 0.88 0.99 1.01 0.98 1.03 0.98 0.98 0.91 1.01 0.75 0.97 0.94 1.04 1.03 1.05 0.94 A

A A

A W

W A

A A

A W

A A

A W

A A

A W

A A

June 2006 E5018-396 Milk E5019-396 Milk E5021-396 AP Sr-89 Sr-90 pCi/L 118 129 pCi/L 9.29 9.74 1-131 Ce-141 Cr-51 Cs-134 Cs-137 Co-58 Mn-54 Fe-59 Zn-65 Co-60 Ce-141 Cr-51 Cs-134 Cs-137 Co-58 Mn-54 Fe-59 Zn-65 Co-60 pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi pCi pCi pCi pCi pCi pCi pCi pCi 49.9 174 266 111 116 101 144 96.7 182 126 113 176 63.7 76.8 63.1 102 64.6 131 81.6 63.2 184 259 127 117 100 146 93.6 185 129 124 174 85.1 79.0 67.4 99 62.9 125 86.5 E5020-396 Charcoal 1-131 pCi 65.4 65.9 0.99 A

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

Identification Reported Known Ratio (c)

MonthNear Number Matrix Nuclide Units Value(a)

Value (b)

TBE/Analytics Evaluation (d)

September 2006 E5120-396 Milk E5121-396 Milk E5123-396 AP Sr-89 Sr-90 1-131 Ce-141 Cr-51 Cs-134 Cs-137 Co-58 Mn-54 Fe-59 Zn-65 Co-60 Ce-141 Cr-51 Cs-134 Cs-137 Co-58 Mn-54 Fe-59 Zn-65 Co-60 Co-57 pCi/L 90.3 89.2 pCi/L 11.6 12.4 pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi pCi pCi pCi pCi pCi pCi pCi pCi pCi 67.8 85.0 263 74.7 172 107 110 46.6 144 127 67.1 223 51.7 134 84.8 95.2 41.6 123 98.9 0.922 73.8 86.0 282 85.0 175 109 113 43.7 145 134 66.4 217 65.6 135.0 84.3 87 33.7 112 103 (1) 1.01 0.94 0.92 0.99 0.93 0.88 0.98 0.98 0.98 1.07 0.99 0.95 1.01 1.03 0.79 0.99 1.01 1.10 1.23 1.10 0.96 NA 0.86 1.01 1.19 1.02 0.91 0.97 0.87 0.97 0.98 1.02 1.00 1.04 0.94 1.05 1.11 0.86 1.09 1.09 1.15 1.25 1.16 1.04 A

A A

A W

A A

A W

A A

NA A

E5122-396 Charcoal 1-131 December 2006 E5172-396 pCi 77.7 90.7 pCi/L 72.4 72.0 pCi/L 7.05 5.90 Milk E5173-396 Milk E5175-396 AP Sr-89 Sr-90 1-131 Ce-141 Cr-51 Cs-134 Cs-137 Co-58 Mn-54 Fe-59 Zn-65 Co-60 Ce-141 Cr-51 Cs-134 Cs-137 Co-58 Mn-54 Fe-59 Zn-65 Co-60 pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi pCi pCi pCi pCi pCi pCi pCi pCi 71.9 268 420 128 231 82.0 113 79.8 170 265 220 343 90.8 185 65.0 90.6 70.7 136 208 70.8 294 433 147 237 83.8 111 79.7 164 281 210 309 105 169.0 59.7 79 56.7 117 200 A

A A

A W

A A

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

Identification 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 Engineering reported result.

(b) The Analytics known value is equal to 100% of the parameter present in the standard as determined by gravimetric and/or volumetric measurements made during standard preparation.

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

(cO Analytics evaluation based on TBE internal QC limits: A= Acceptable. Reported result falls within ratio limits of 0.80-1.20.

W-Acceptable with warning. Reported result falls wthin 0.70-0.80 or 1.20-1.30. N = Not Acceptable. Reported result falls outside the ratio limits of < 0. 70 and > 1.30.

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

Identification Reported Known MonthNear Number Media Nuclide Units Value (a)

Value (b)

Control Limits Evaluation (c)

May 2006 Rad 65 Water Sr-89 Sr-90 Ba-133 Cs-134 Cs-137 Co-60 Zn-65 Gr-A Gr-B Ra-226 U-Nat H-3 Rad 65 Water 1-131 pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L pCi/L 30.2 8.74 10.9 39.7 199 111 146 22.9 23.7 2.64 74.9 7950 18.2 40.0 16.2 65.0 27.4 74.4 61.6 277 23.3 22.0 3.18 2930 32.4 9.00 10.0 43.4 214 113.0 152 21.3 23.0 3.02 69.1 8130 19.1 39.9 16.0 70.2 29.9 78.2 62.3 277 28.7 20.9 3.20 3050 23.6-41.1 0.340- 17.7 1.34-18.7 34.7-52.1 195 - 233 103-123 126-178 12.1 -30.5 14.3-31.7 2.23 - 3.81 57.1 -81.1 6720 - 9540 13.9-24.3 31.2-48.6 7.34 - 24.7 58.1 -82.3 21.2-38.6 69.5-86.9 53.6 -71.0 229 - 325 16.3 -41.1 12.2-29.6 0.00 - 8.40 2430 - 3670 16.9-27.3 A

A A

November 2006 Rad 67 Water Sr-89 Sr-90 Ba-133 Cs-134 Cs-137 Co-60 Zn-65 Gr-A Gr-B U-Nat H-3 Water 1-131 19.8 22.1 (a) Teledyne Brown Engineering reported result.

(b) The ERA known value is equal to 100% of the parameter present in the standard as determined by gravimetric and/or volumetric measurements made during standard preparation.

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

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 Cs-134 Cs-137 Co-57 Co-60 H-3 Fe-55 Mn-54 Ni-63 Pu-238 Pu-239/240 Sr-90 Tc-99 U-234/233 U-238 Zn-65 06-GrW15 Water Gr-A Gr-B Bq/L Bq/L Bq/L Bq/L Bq/L Bq/L Bq/L Bq/L Bq/L Bq/L Bq/L Bq/L Bq/L Bq/L Bq/L Bq/L 1.29 1.30 0.91 -1.69 79.2 95.1 66.57 - 123.63

-0.188 151 166.12 116.28-215.96 141 153.50 107.45-199.55 988 952.01 666.41 - 1237.61 106.0 129.60 90.72 - 168.48 297 315.00 220.50 - 409.50 61.5 60.34 44.24 - 78.44 0.961 0.91 0.64-1.18 0.00965 0.00710 (1) 12.6 13.16 9.21-17.11 22.5 23.38 16.37 - 30.39 2.20 2.09 1.46-2.72 2.23 2.17 1.52-2.82 219 228.16 159.71 - 296.61 Bq/L 0.575 0.581

>0.0 - 1.162 Bq/L 1.52 1.13 0.56-1.70 06-MaS15 Soil 06-RdF15 AP 06-GrF15 AP Am-241 Cs-134 Cs-137 Co-57 Co-60 Mn-54 Ni-63 K-40 Sr-90 Tc-99 Zn-65 Bq/kg Bq/kg Bq/kg Bq/kg Bq/kg Bq/kg Bq/kg Bq/kg Bq/kg Bq/kg Bq/kg 48.8 57.08 39.96 - 74.20 15.9 370 339.69 237.78 - 441.60 667 656.29 459.40 - 853.18 478 447.10 312.97 - 581.23 384 346.77 242.74 - 450.80 394 323.51 226.46 - 420.56 667 604 423-785 253 314.35 220.04 - 408.66 146 154.76 108.33-201.19 740 657.36 460.15 - 854.57 A

A A

N (2)

A A

W A

A A

A Am-241 Bq/sample 0.0850 0.093 0.065- 0.121 Cs-134 Bq/sample 2.34 2.934 2.054 - 3.814 Cs-137 Bq/sample 2.45 2.531 1.772 - 3.290 Co-57 Bq/sample 3.87 4.096 2.867 - 5.325 Co-60 Bq/sample 2.12 2.186 1.530 - 2.842 Mn-54 Bq/sample 0.0206 not spiked Pu-238 Bq/sample 0.0766 0.067 0.047 - 0.087 Pu-239/240 Bq/sample 0.00520 0.00041 (1)

Sr-90 Bq/sample 0.761 0.792 0.554 - 1.030 U-234/233 Bq/sample 0.0217 0.020 0.014 - 0.026 U-238 Bq/sample 0.0220 0.021 0.015- 0.027 Zn-65 Bq/sample 3.86 3.423 2.396 - 4.450 Gr-A Gr-B Bq/sample 0.257 0.361

>0.0 - 0.722 Bq/sample 0.398 0.481 0.241 - 0.722

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

TELEDYNE BROWN ENGINEERING, 2006 (PAGE 2 OF 3)

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

Value (b)

Range Evaluation (c)

January 2006 06-RdV15 Vegetation Am-241 Cs-134 Cs-137 Co-57 Co-60 Mn-54 Pu-238 Pu-239/240 Sr-90 U-234/233 U-238 Zn-65 Bq/sample Bq/sample Bq/sample Bq/sample Bq/sample Bq/sample Bq/sample Bq/sample Bq/sample Bq/sample Bq/sample Bq/sample July 2006 06-MaW16 Water Am-241 Cs-134 Cs-137 Co-57 Co-60 H-3 Fe-55 Ni-63 Pu-238 Pu-239/240 Sr-90 Tc-99 U-234/233 U-238 Zn-65 Bq/L Bq/L Bq/L Bq/L Bq/L Bq/L Bq/L Bq/L Bq/L Bq/L Bq/L Bq/L Bq/L Bq/L Bq/L 0.156 0.369 3.15 10.1 4.69 6.53 0.183 0.111 2.22 0.208 0.176 10.5 2.09 99.8 191 203 46.2 471 173 109 1.50 2.01 13.7 29.0 2.19 2.25 178 0.156 0.109-0.203 not spiked 3.074 2.152-3.996 8.578 6.005 - 11.151 4.520 3.164-5.876 6.247 4.373-8.121 0.137 0.096- 0.178 0.164 0.115- 0.213 1.561 1.093-2.029 0.208 0.146 - 0.270 0.216 0.151 -0.281 9.798 6.859 - 12.737 A

A A

A N (3)

N (3)

A A

A 2.31 112.82 196.14 213.08 47.5 428.85 165.4 118.62 1.39 1.94 15.69 27.15 2.15 2.22 176.37 1.62-3.00 78.98-146.66 137.30-254.98 149.16-277.00 33.2-61.8 300.20 - 557.50 115.8-215.0 83.03-154.21 0.97-1.81 1.36-2.52 10.98-20.40 19.00- 35.29 1.50-2.80 1.55-2.89 123.46 - 229.28 A

A A

06-GrW16 Water Gr-A Gr-B Bq/L 1.52 Bq/L 1.18 1.033

>0.0 - 2.066 1.03 0.52-1.54 06-MaS16 Soil Am-241 Cs-134 Cs-137 Co-57 Co-60 Mn-54 Ni-63 Pu-238 Pu-239240 K-40 Sr-90 Tc-99 U-234/233 U-238 Zn-65 Bq/kg Bq/kg Bq/kg Bq/kg Bq/kg Bq/kg Bq/kg Bq/kg Bq/kg Bq/kg Bq/kg Bq/kg Bq/kg Bq/kg Bq/kg 83.6 393 522 636 3.78 598 571 71.2 0.487 615 178 175 119 115 937 105.47 452.13 525.73 676.33 1.98 594.25 627.3 82 0.93 604 223.3 218.01 152.44 158.73 903.61 73.83-137.11 316.49 - 587.77 368.01 - 683.45 473.43 - 879.23 415.98 -772.52 470.6 - 874.0 57-107 423-785 156.3-290.3 152.61 -283.41 106.71 - 198.17 111.11 -206.35 632.53 - 1174.69 W

A A

A A (4)

A A

A A (4)

A W

W A

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 Cs-134 Cs-137 Co-57 Co-60 Mn-54 Pu-238 Pu-239/240 Sr-90 U-234/233 U-238 Zn-65 Bq/sample Bq/sample Bq/sample Bq/sample Bq/sample Bq/sample Bq/sample Bq/sample Bq/sample Bq/sample Bq/sample Bq/sample 0.124 2.62 1.98 2.65 1.63 2.10 0.118 0.00822 0.549 0.140 0.136

-0.163 0.142 3.147 1.805 2.582 1.577 1.92 0.118 0.62 0.134 0.139 0.099 - 0.185 2.203 - 4.091 1.263 - 2.346 1.807 - 3.357 1.104 - 2.050 1.34 -2.50 0.083 - 0.153 not spiked 0.43-0.81 0.094 - 0.174 0.097 - 0.181 not spiked A

A A

A 06-GrF16 AP Gr-A Gr-B Bq/sample 0.134 0.290

>0.0 - 0.580 Bq/sample 0.358 0.359 0.180 - 0.538 (1) False positive test (2) Evaluated as a false positive by MAPEP although we considered the result a non-detect due to the peak not being identified by the gamma software. For Cs-134, MAPEP suggests the Bi-214 is not being differentiated from the Cs-134 peak.

(3) Sr samples analyzed in triplicate and one high result of 2.43 pCifkg biased the submitted results on the high side.

We were unable to determine the cause for the higher result. Since we do not analyze vegetation for isotpic Pu, no NCR was initiated for the Pu failure. MAPEP suggest pyrosuffate fusion preparation prior to analysis for isotopic Pu in vegetation samples.

(4) Not detected, reported a statistically zero result. (False positive test)

(a) Teledyne Brown Engineering reported result.

(b) The MAPEP known value is equal to 100% of the parameter present in the standard as determined by gravimetric and/or volumetric measurements made during standard preparation.

(c) DOEIMAPEP evaluation: A =acceptable, W=acceptable with warning, N=not acceptable.

TABLE D-4 ERA(al 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-1 078 STW-1 078 STW-1 079 STW-1 079 STW-1 079 STW-1 079 STW-1 079 STW-1 080 STW-1080 STW-1 081 STW-1 081 STW-1 081 STW-1 088 STW-1 088 STW-1 089 STW-1 089 STW-1 089 STW-1 089 STW-1 089 STW-1 090 STW-1 090 STW-1091 STW-1 092 STW-1092 STW-1 092 STW-1 092 STW-1 094 STW-1 094 STW-1 095 STW-1 095 STW-1 095 STW-1 095 STW-1095 STW-1096 STW-1 096 STW-1097 STW-1097 STW-1 097 01/16/06 01/16/06 01/16/06 01/16/06 01/16/06 01/16/06 01/16/06 01/16/06 01/16/06 01/16/06 01/16/06 01/16/06 04/10/06 04/10/06 04/10/06 04/10/06 04/10/06 04/10/06 04/10/06 04/10/06 04/10/06 04/10/06 04/10/06 04/10/06 04/10/06 04/10/06 07/10/06 07/10/06 07/10/06 07/10/06 07/10/06 07/10/06 07/10/06 07/10/06 07/10/06 07/10/06 07/10/06 07/10/06 Sr-89 Sr-90 Ba-1 33 Co-60 Cs-1 34 Cs-1 37 Zn-65 Gr. Alpha Gr. Beta Ra-226 Ra-228 Uranium Sr-89 Sr-90 Ba-1 33 Co-60 Cs-134 Cs-137 Zn-65 Gr. Alpha Gr. Beta 1-131 H-3 Ra-226 Ra-228 Uranium Sr-89 Sr-90 Ba-1 33 Co-60 Cs-1 34 Cs-1 37 Zn-65 Gr. Alpha Gr. Beta Ra-226 Ra-228 Uranium 49.9 +/- 3.5 31.5 +/- 1.5 86.5 +/- 4.1 96.3 +/- 4.1 22.6 +/- 3.0 109.0 +/- 5.9 198.0 +/- 11.2 10.8 +/- 1.4 56.9 +/- 1.9 4.3 +/- 0.4 7.1 +/- 1.8 20.7 +/- 0.5 29.0 +/- 1.8 8.7 +/- 1.0 10.3 +/- 0.4 114.0 +/-2.8 41.9 +/- 1.4 208.0 +/- 1.1 154.0 +/- 0.8 13.4 +/- 1.1 27.7 +/- 2.1 22.0 +/- 0.3 7960.0 +/- 57.0 2.9 +/- 0.4 20.9 +/- 1.2 68.6 +/- 3.4 15.9 +/- 0.7 24.3 +/- 0.4 94.9 +/- 8.9 104.0 +/- 1.8 48.7 +/- 1.3 236.0 +/- 3.0 126.0 +/-8.0 10.9 +/- 1.0 9.7 +/- 0.4 11.0 +/-0.5 12.2 +/-0.8 43.4 +0.1 50.2 30.7 95.0 95.3 23.1 111.0 192.0 9.6 61.9 4.6 6.6 22.1 32.4 9.0 10.0 113.0 43.4 214.0 152.0 21.3 23.0 19.1 8130.0 3.0 19.1 69.1 19.7 25.9 88.1 99.7 54.1 238.0 121.0 10.0 8.9 10.7 10.7 40.3 41.5 -58.9 22.0 -39.4 78.6 -111.0 86.6 - 104.0 14.4 -31.8 101.0 -121.0 159.0 - 225.0 1.0 -18.3 44.6 -79.2 3.4 -5.8 3.7 -9.5 16.9 -27.3 23.7 -41.1 0.3 -17.7 1.3 -18.7 103.0 -123.0 34.7 -52.1 195.0 -233.0 126.0 -.178.0 12.1 -:'30.5 14.3 -'31.7 13.9 -24.3 6720.0 - 9540.0 2.2 - 3.8 10.8 -27.4 57.1 -81.1 11.0 -28.4 17.2 -34.6 72.9 -103.0 91.0 -108.0 45.4 - 62.8 217.0 - 259.0 100.0 -142.0 1.3 -18.6 0.2 -17.5 7.9 -13.5 6.1 -15.3 33.3 - 47.3 Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass' Pass' Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass D-8

TABLE D-4 ERA1 a, STATISTICAL

SUMMARY

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

Concentration (pCi/L)

Lab Code Date Analysis Laboratory ERA Control Resultb Resultc Limits Acceptance STW-1 104 STW-1104 STW-1 105 STW-1105 STW-1 105 STW-1 105 STW-1 105 STW-1 106 STW-1 106 STW-1107 STW-1 108 STW-1 108 STW-1 108 STW-1 109 10/06/06 10/06/06 10/06/06 10/06/06 10/06/06 10/06/06 10/06/06 10106106 10/06/06 10/06/06 10/06/06 10/06/06 10/06/06 10/06/06 Sr-89 Sr-90 Ba-1 33 Co-60 Cs-1 34 Cs-1 37 Zn-65 Gr. Alpha Gr. Beta 1-131 Ra-226 Ra-228 Uranium H-3 38.4 +/- 1.3 15.5 +/- 0.5 64.9 +/- 2.8 61.6 +/- 1.0 29.0 +/- 0.9 77.8 +/- 2.4 293.0 +/- 2.4 23.9 +/- 2.5 23.7 +/- 1.4 28.4 +/- 1.2 14.5 +/- 0.5 6.6 +/- 0.4 2.9 +/- 0.1 3000.0 +/- 142.0 39.9 16.0 70.2 62.3 29.9 78.2 277.0 28.7 20.9 22.1 14.4 5.9 3.2 3050.0 31.2 -45.7 7.3 -24.7 58.1 - 82.3 53.6 -71.0 21.2 -38.6 69.5 -86.9 229.0 -325.0 16.3 -41.1 12.2 -29.6 16.9 - 27.3 10.7 -18.1 3.3 -8.4 0.0 -8.4 2430.0 - 3670.0 Pass Pass Pass Pass Pass Pass Pass Pass Pass Fail Pass Pass Pass Pass a Results obtained by Environmental, Inc., Midwest Laboratory as a participant in the crosscheck program for proficiency testing in drinking water conducted by Environmental Resources Associates (ERA).

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

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

d 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

TABLE D-5 DOE'S MIXED ANALYTE PERFORMANCE EVALUATION PROGRAM (MAPEPf ENVIRONMENTAL, INC., 2006 (Page 1 of 3)

Concentration b Known Control Lab Codec Date Analysis Laboratory result Activity Limits d Acceptance STVE-1 082 STVE-1 082 STVE-1 082 STVE-1 082 STVE-1 082 STVE-1 082 STVE-1082 STVE-1 082 STVE-1 082 STVE-1 082 STVE-1 082 STVE-1 082 STSO-1 083 STSO-1 083 STSO-1 083 STSO-1 083 e STSO-1 083 STSO-1 083 STSO-1 083 STSO-1 083 STSO-1083 STSO-1 083 STSO-1 083 STSO-1083 STSO-1 083 01/01/06 01/01/06 01/01/06 01101/06 01/01/06 01/01/06 01/01/06 01/01/06 01/01/06 01/01/06 01/01/06 01/01/06 01/01/06 01/01/06 01/01/06 01/01/06 01/01/06 01/01/06 01/01/06 01/01/06 01/01/06 01/01/06 01/01/06 01/01/06 01/01/06 Am-241 Co-57 Co-60 Cs-1 34 Cs-1 37 Mn-54 Pu-238 Pu-239/40 Sr-90 U-233/4 U-238 Zn-65 Am-241 Co-57 Co-60 Cs-1 34 Cs-1 37 K-40 Mn-54 Ni-63 Pu-238 Pu-239/40 U-233/4 U-238 Zn-65 0.16 +/- 0.06 10.40 +/- 0.20 5.00 +/- 0.20

< 0.20 3.40 +/- 0.20 6.90 +/- 0.20 0.08 +/- 0.03 0.17 +/- 0.03 1.40 +/- 0.20 0.24 +/- 0.05 0.19 +/- 0.04 11.10 +/- 0.50 54.60 +/- 5.50 762.90 +/- 12.70 504.90 +/- 3.10

< 1.70 406.50 +/- 3.70 719.20 +/- 18.40 415.60 +/- 4.80 261.40 +/- 14.70 14.60 +/- 2.90 14.60 +/- 2.40 13.50 +/- 1.70 15.40 +/- 1.80 783.40 +/- 7.00 0.16 8.58 4.52 0.00 3.07 6.25 0.14 0.16 1.56 0.21 0.22 9.80 0.11 -0.20 6.00 -11.15 3.16 -5.88 2.15 -4.00 4.37 -8.12 0.10 -0.18 0.11 -0.21 1.09 - 2.03 0.15 -0.27 0.15 -0.28 6.86 -12.74 Pass Pass Pass Pass Pass Pass Fail Pass Pass Pass Pass Pass 57.08 656.29 447.10 0.00 339.69 604.00 346.77 323.51 61.15 45.85 37.00 38.85 657.36 39.96 - 74.20 459.40 - 853.18 312.97 -581.23 237.78 -441.60 422.80 - 785.20 242.74 - 450:80 226.46 - 420.56 42.81 -79.50 32.09 -59.61 25.90 -48.10" 27.20 - 50.50 460.15 -854.57 Pass Pass Pass Pass Pass Pass Pass L,

Pass Fail Fail Fail Fail Pass STAP-1 084 01/01/06 Gr. Alpha STAP-1084 01/01/06 Gr. Beta STAP-1 085 STAP-1 085 STAP-1 085 STAP-1 085 STAP-1 085 STAP-1085 t STAP-1 085 e STAP-1 085 STAP-1 085 STAP-1 085 STAP-1 085 01/01/06 01/01/06 01/01/06 01/01/06 01/01/06 01/01/06 01/01/06 01/01/06 01/01/06 01/01/06 01/01/06 Am-241 Co-57 Co-60 Cs-1 34 Cs-137 Pu-238 Pu-239/40 Sr-90 U-233/4 U-238 Zn-65 0.26 +/- 0.02 0.51 +/- 0.03 0.12 +/- 0.02 4.32 +/- 0.10 2.24 +/- 0.16 2.96 +/- 0.19 2.64 +/- 0.20 0.03 +/- 0.01

< 0.01 0.77 +/- 0.21 0.03 +/- 0.01 0.02 +/- 0.01 3.94 +/- 0.44 0.36 0.48 0.09 4.10 2.19 2.93 2.53 0.07 0.00 0.79 0.02 0.02 3.42 0.00 -0.72 0.24 -0.72 0.07 -0.12 2.87 - 5.32 1.53 -2.84 2.05 - 3.81 1.77 -3.29 0.05 - 0.09 0.55 - 1.03 0.01 - 0.03 0.01 - 0.03 2.40 - 4.45 Pass Pass Pass Pass Pass Pass Pass Fail Pass Pass Pass Pass Pass

TABLE D-5 DOE'S MIXED ANALYTE PERFORMANCE EVALUATION PROGRAM (MAPEPr ENVIRONMENTAL, INC., 2006 (Page 2 of 3)

Concentration b Known Control Lab Codec Date Analysis Laboratory result Activity Limits d Acceptance STW-1 086 STW-1 086 STW-1 086 STW-1 086 STW-1 086 e STW-1 086 STW-1 086 STW-1 086 STW-1 086 STW-1 086 STW-1 086 STW-1 086 STW-1 086 STW-1 086 STW-1 086 STW-1086 STW-1 087 STW-1 087 STVE-1 098 STVE-1 098 g STVE-1 098 STVE-1 098 STVE-1 098 STVE-1 098 STSO-1 099 STSO-1099 STS O-1099 STSO-1 099 STSO-1 099 STSO-1 099 STSO-1 099 STSO-1 099 STSO-1 099 STSO-1 099 e ST-SO-1099 STSO-1 099 STSO-1 099 01/01/06 01/01/06 01/01/06 01/01/06 01/01/06 01/01/06 01/01/06 01/01106 01/01/06 01/01/06 01/01/06 01/01/06 01/01/06 01/01/06 01/01/06 01/01/06 01/01/06 01/01/06 07/01/06 07/01/06 07/01/06 07/01/06 07/01/06 07/01/06 07/01/06 07/01/06 07/01/06 07/01/06 07/01/06 07/01/06 07/01/06 07/01/06 07/01/06 07/01/06 07/01/06 07/01/06 07/01/06 Am-241 Co-57 Co-60 Cs-1 34 Cs-1 37 Fe-55 H-3 Mn-54 Ni-63 Pu-238 Pu-239/40 Sr-90 Tc-99 U-233/4 U-238 Zn-65 Gr. Alpha Gr. Beta Co-57 Co-60 Cs-1 34 Cs-1 37 Mn-54 Zn-65 Am-241 Co-57 Co-60 Cs-1 34 Cs-1 37 K-40 Mn-54 Ni-63 Pu-238 Pu-239/40 U-233/4 U-238 Zn-65 1.29 +/- 0.05 177.10 +/- 1.00 158.30 +/- 1.00 96.40 + 1.50

< 0.80 102.50 +/- 18.10 956.60 +/- 16.50 335.30 +/- 2.20 62.90 +/- 3.60 0.96 +/- 0.07

< 0.20 12.80 +/- 1.60 22.30 +/- 1.20 2.02 +/- 0.12 2.03 +/- 0.12 249.50 +/- 3.40 0.59 +/- 0.10 1.69 +/- 0.07 6.89 8.46 6.87 10.36 7.46

< 0.14

+/- 0.17

+/- 0.16

+/- 0.29

+/- 0.50 1.30 166.12 153.50 95.10 0.00 129.60 952.01 315.00 60.34 0.91 0.00 13.16 23.38 2.09 2.17 228.16 0.58 1.13 0.00 5.81 7.49 5.50 8.35 5.98 105.47 676.33 1.98 452.13 525.73 604.00 594.25 672.30 82.00 0.00 152.44 158.73 903.61 0.91 - 1.69 116.28 - 215.96 107.45 - 199.55 66.57 - 123.63 90.72 - 168.48 666.41 - 1238.00 220.50 - 409.50 42.24 - 78.44 0.70 - 1.30 9.21 -17.11 16.37 - 30.39 1.46 - 2.72 1.52 - 2.82 159.71 - 296.61 0.00-1.16 0.56 - 1.70 Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass 130.00 +/- 11.60 784.90 +/- 3.80 2.10 +/- 0.90 500.70 +/- 7.40 624.20 +/- 4.90 701.30 +/- 3.40 699.20 +/- 5.20 614.40 +/- 17.10 79.90 +/- 5.80

< 0.70 150.50 +/- 5.90 151.60 +/- 6.00 1021.90 +/- 9.20 4.06 5.24 3.85 5.85 4.19 73.83 473.43 0.00 316.49 368.01 423.00 415.98 470.60 57.00 106.71 111.11 632.53

-7.55

-9.73

-7.14

-10.86

-7.78

-137.11

-879.23

-5.00

-587.77

-683.45

-785.00

-772.52

-874.00

-107.00

-198.17

-206.35

-1175.00

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

Concentration b Known Control Lab Codec Date Analysis Laboratory result Activity Limits d Acceptance STAP-1 100 STAP-1 100 STAP-1 100 STAP-1 100 STAP-1 100 STAP-1 100 STAP-1 100 STAP-1 100 STAP-1 100 STAP-1 100 STAP-1 100 e STAP-1 101 STAP-1 101 STW-1102 STW-1102 STW-1103 STW-1103 STW-1103 STW-1103 STW-1103'

STW-1103 STW-1 103 STW-1.103 e STW-1103 STW-1103 STW-1103 STW-1103 STW-1103 STW-1103 STW-1103 STW-1103 07/01/06 07/01/06 07/01/06 07/01/06 07/01/06 07/01/06 07/01/06 07/01/06 07/01/06 07/01/06 07/01/06 07/01/06 07/01/06 07/01/06 07/01/06 07/01/06 07/01/06 07/01/06 07/01/06 07/01/06 07/01/06 07/01/06 07/01/06 07/01/06 07/01/06 07/01/06 07/01/06 07/01/06 07/01/06 07/01/06 07/01/06 Am-241 Co-57 Co-60 Cs-1 34 Cs-1 37 Mn-54 Pu-238 Sr-90 U-233/4 U-238 Zn-65 Gr. Alpha Gr. Beta Gr. Alpha Gr. Beta Am-241 Co-57 Co-60 Cs-1 34 Cs-1 37 Fe-55 H-3 Mn-54 Ni-63 Pu-238 Pu-239/40 Sr-90 Tc-99 U-233/4 U-238 Zn-65 0.16 +/- 0.03 2.17 +/- 0.06 1.38 +/- 0.07 2.52 +/- 0.13 1.64 +/- 0.08 1.76 +/- 0.18 0.09 +/- 0.02 0.66 +/- 0.21 0.15 +/- 0.02 0.13 +/- 0.02

< 0.07 0.08 +/- 0.03 0.41 +/- 0.05 0.14 2.58 1.58 3.15 1.81 1.92 0.12 0.62 0.13 0.14 0.00 0.29 0.36 0.10 -0.19 1.81 - 3.36 1.10 -2.05 2.20 -4.09 1.26 -2.35 1.34 -2.50 0.08 -0.15 0.43 - 0.81 0.09 -0.17 0.10 -0.18 0.00 - 0.58 0.18 -0.54 Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass 0.76 +/- 0.07 1.23 +/- 0.06 1.86 +/- 0.09 224.10 +/- 1.20 49.40 +/- 0.50 112.70 +/- 0.90 206.60 +/- 1.40 138.40 +/- 5.40 446.50 +/- 11.80

< 0.30 116.70 +/- 3.60 1.27 +/- 0.07 1.67 +/- 0.08 16.40 +/- 1.90 29.40 +/- 1.10 1.97 +/- 0.08 1.97 +/- 0.08 192.50 +/- 2.40 1.03 1.03 2.31 213.08 47.50 112.82 196.14 165.40 428.85 0.00 118.62 1.39 1.94 15.69 27.15 2.15 2.22 176.37 0.00 - 2.07 0.52-1.54 1.62 - 3.00 149.16 - 277.00 33.20 - 61.80 78.97 - 146.66 137.30 - 254.98 115.80 - 215.0:

300.20 - 557.50; 83.03 - 154.21 0.97 - 1.81 1.36 - 2.52 10.98 - 20.40 19.00 - 35.29 1.50 - 2.80 1.55 - 2.89 123.46 - 229.28 Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass 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, 1 determination) and control limits as defined by the MAPEP.

e 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 bq/kg.

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.

APPENDIX E EFFLUENT DATA

TABLE OF CONTENTS IN T R O D U C T IO N....................................................................................................................

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

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

3 1.1. Gaseous Effluents to the Atmosphere...............................................

3 1.2. Liquids Released to Lake Michigan....................................................

3 2.0. SOLID RADIOACTIVE W ASTE....................................................................

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

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

3 3.1.1. Gaseous Releases................................................................

4 3.1.1.1. Gamma Dose Rates...............................................

4 3.1.1.2. Beta Air and Skin Dose Rate..................................

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

5 3.1.3. Dose to Thyroid....................................................................

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

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

5 4.0. SITE METEOROLOGY.................................................................................

6

Table of Contents (cont.)

APPENDIX E-1 DATA TABLES AND FIGURES.............................................................

E-1.1 Station Releases Table 2.0-1 Table 3.1-1 Table 3.2-1 Table 3.3-1 Table 3.4-1 Solid Radioactive W aste...........................................................

E-1.2 Maximum Doses Resulting from Airborne Releases................. E-1.3 Maximum Doses Resulting from Liquid Effluents......................

E-1.5 10CFR20 Compliance Assessment..........................................

E-1.6 Maximum doses Resulting from Airborne Releases Based On Concurrent Meteorological Data.........................................

E-1.7 ii

INTRODUCTION Units 1 and 2 of the Zion Station, located in Zion, Illinois adjacent to Lake Michigan, are 1100 MWe (3520 MWt) Westinghouse pressurized water reactors.

The plant permanently ceased operation in February of 1998 and has been permanently defueled.

The station was designed to keep releases to the environment at levels below those specified in the regulations. Historical data has been established that Zion, as a fully operational facility, did not contribute appreciable doses to the surrounding public. Sampling results for 2006 showed zero releases above background for a variety of monitored pathways, e.g. water, vegetation, air samples and TLIV.

Liquid effluents from Zion Station are released to Lake Michigan in controlled batches after radioassay of each batch and continuously through a monitored pathway. There are no routine noble gas releases. Due to decay, iodine is no longer present. The only noble gas that remains is Kr85 captured in the spent fuel assemblies stored in the fuel pool in the fuel building (1713). A new ventilation system for the FB has been installed to monitor possible releases. 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 was conducted by sampling at indicator and control (background) locations in the vicinity of the Zion Station to measure changes in radiation or radioactivity levels that may be attributable to the station. If significant changes attributable to Zion Station are measured, these changes are correlated with effluent releases.

1

SUMMARY

Gaseous and liquid effluents for the period contributed to only a small fraction of the Station Technical Specification limits. Calculations of environmental concentrations based on effluent and meteorological data for the period indicate that consumption by the public of radionuclides attributable to the Zion Station does not exceed regulatory limits. Radiation exposure from radionuclides released to the atmosphere represented the critical pathway for the period with a maximum individual total body dose estimated to be 9.04E-05 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 Exelon Offsite Dose Calculation Manual (ODCM). The results of analysis confirm that the station is operating in compliance with 1 OCFR50 Appendix 1, 1 OCFR20 and 40CFR1 90.

2

1.0 EFFLUENTS 1.1 Gaseous Effluents to the Atmosphere Measured concentrations and isotopic composition of noble gases, radioiodine, and particulate radioactivity released to the atmosphere during the year, are listed in Table 1.1-1. A total of 0.OOE+00 microcuries of fission and activation gases was released with a maximum average release rate of 0.OOE+00 pCi/sec during any one quarter period.

A total of 0.OOE+00 microcuries of 1-131 was released during the year with a maximum average quarterly release rate of 0.O0E+00 pICi/sec.

A total of 1.26E00 microcuries of beta-gamma emitters was released as airborne particulate matter with a maximum average quarterly release rate of 1.38E-07 pCi/sec. quarterly only.

Alpha-emitting radionuclides were not measurable. Also, 0.OOE+00 curies of tritium were released with a maximum average quarterly release rate of 0.OOE+00 pCi/sec.

1.2 Liquids Released to Lake Michigan A total of 2.08E07 liters of liquid waste containing 0.OOE+00 microcuries was discharged from the station via an approved pathway after dilution with a total of 3.97E10 liters of water. These wastes were released at a maximum quarterly average concentration of 0.OOE+00 pCi/ml. A total of 0.OOE-00 curies of tritium was released. Alpha activity released totaled 0.00 pCi for the year. Monthly release estimates and principal radionuclides in liquid effluents are given in Table 1.2-1.

2.0 SOLID RADIOACTIVE WASTE There were no solid radioactive waste shipments. For more detail, refer to Zion Station 2006 Effluent Report.

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

3

3.1.1 Gaseous Releases 3.1.1.1 Gamma Dose Rates Offsite Gamma air and whole (total) body dose rates are shown in Table 3.1-1 and were calculated based on measured release rates, isotopic composition of the gases, and meteorological data for the period. Based on measured effluents and average meteorological data, the maximum total body dose to an individual would be 9.02E-05 mrem (adult) for the year (Table 3.1-1), with an occupancy or shielding factor of 0.7 included, and based on measured effluents and concurrent meteorological data would be 9.02 E-05 mrem (Table 3.4-1). The maximum gamma air dose was 0.00E+00 mrad based on measured effluents and average meteorological data (Table 3.1-1), and 0.OOE+00 mrad based on measured effluents and concurrent meteorological data (Table 3.4-1).

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

consequently, plumes of gaseous effluents may be considered "infinite" for purpose of calculating the dose from beta radiation incident on the skin. However, the actual dose to sensitive skin tissues is difficult to calculate due to the effect of the beta particle energies, thickness of inert skin and clothing covering sensitive tissues. For purposes of this report the skin is taken to have a thickness of 7.0 mg/cm2 and an occupancy factor of 1.0 is used. The skin dose from beta and gamma radiation for the year was 0.OOE+00 mrem based on measured effluents and average meteorological data (Table 3.1-1), and 0.OOE+00 mrem based on measured effluents and concurrent meteorological data (Table 3.4-1).

4

The maximum offsite beta air dose for the year was O.OOE+00 mrad based on measured effluents and average meteorological data (Table 3.1-1), and O.OOE+00 mrad based on measured effluents and concurrent meteorological data (Table 3.4-1).

3.1.2 Radioactive Iodine The human thyroid exhibits a significant capacity to concentrate ingested or inhaled iodine. The radioiodine, 1-131, released during routine operation of the station, may be made available to man resulting in a dose to the thyroid.

The principal pathway of interest for this radionuclide is ingestion of radioiodine in milk. As Zion Station is not operational and 1-131 has decayed away, the maximum offsite concentration is estimated to be zero, as expected.

3.1.3 Doseto Thyrid The hypothetical thyroid dose to a maximum exposed individual living near the station via ingestion of milk was calculated. As Zion Station is not operational and 1-131 has decayed away, the maximum offsite concentration is estimated to be zero, as expected.

3.2 Liquid Fffluent 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 GI tracts, thyroid, bone, skin; specific parameters for use in the equations are given in the Exelon Offsite Dose Calculation Manual. The maximum whole body dose (total body) for the year was O.OOE+00 mrem (adult) and no organ dose exceeded O.OOE+00 mrem (teenage liver) (Table 3.2-1).

3.3 Assessment of Dose to Member of Public 5

During the period January to December, 2006, Zion Station did not exceed the below limits as shown in Table 3.1-1 and Table 3.2-1 (based on yearly average meteorological data), and Figure 3.1-1 (based on concurrent meteorological data):

0 The RETS limits on dose or dose commitment to an individual due to radioactive materials in liquid effluents from each reactor unit (3 mrem to the whole body or 10 mrem to any organ during any 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 (10 mrads for gamma radiation or 20 mrad for beta radiation during any calendar year).

The RETS limits on dose to a member of the public due to iodine-131, iodine-1 33, tritium, and radionuclides in particulate form 'with half-lives greater than eight days in gaseous effluents released from each reactor unit (15 mrem to any organ during any calendar year).

S]The 1 OCFR20limit 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 11. The data are presented as cumulative joint frequency

Nuclear Regulatory Commission, Regulatory Guide 1.109 (Rev. 1) distributions of the wind direction for the 250' level and wind speed class by atmospheric stability class determined from the temperature difference between the 250' and 35' levels. Data recovery for these measurements was 98.8% during 2006 (Table 3.4-1).

6

APPENDIX E-1 DATA TABLES AND FIGURES

Table 2.0-1 Solid Radioactive Waste Table 2.0-1 has been deliberately deleted. For details on solid waste disposal, see the Zion 2006 Annual Effluent Report E-1.2

Table 3.1-1 Maximum Doses Resulting from Airborne Releases RETA!S v3.63.3 eZ2XO>

VIS

1CFR3!9 up "IU)1 FUEL CYCLE

=CE APR I -..

....I Gru Organ fftLz~

I II, F

200.t3 1!M'N LIE 3A, 1.':ý0

3. 2,-MI1

- 0 20, -A=I.Sp. Total Body I-rLULT TECOCY

9. 02P-05

1. G5E403 8.5ga-04 Receptor: 5

ýwplt CrtKL.

Recetvc,ý IP D!

Fa~e 0.0

1 t t u?,

v1,!; Jo CoiltribLlt ~uz:

t1 qteate t6 to'1.13 CC-CO.

iY7F*0 E-1.3

Table 3.1-1 (continued)

Maximum Doses Resulting from Airborne Releases 4DCFR*90 URANIUM MEURL CYCLE DO=E RPOR Unit: P~qe -- FprI: I 2:

2

-NG N02 LIMIhT A.AL"2SI

- -. AlTAL 200f Dm me riAv t

.inx L of 206 -

V'2min.

Gammi D~zjYC 14 L

~ ~

oLý :n2 0.0 4iee 0.90E40i0 1i.509-01 D.GC*I+00 0t0ý0.SOC401 0 iCC'E 00 OA0.CýiýOG

1. 50Cý01 D.GO EC C 0O.GQE400 1.50E+401

0. Of, L00 E-1.4

Table 3.2-1 Maximum Doses Resulting from Liquid Effluents

~REDI, v2.E-3

'IC,>

VZSS I

~~Thit

'9 URA.S iŽ~

£1CR1 11JIUC L

O' IVART 9-1 Liv Thyr idO0 Kidney

~

0 2.0140 t,.0011 0

- - - - - ---2

ý',TTE ~

~

LIMI

-r -- - - -

W M

20D - - --- --

E-1.5

Table 3.3-1 10CFR20 Compliance Assessment ZION STATION 2006 Unit 1 10CFR20 Compliance Assessment

1.

10CFR 20.1301 (a) (1) Compliance Total Effective Dose Equivalent 10 CFR 20.1301 (a) (1) limit

% of the limit.

2.

Compliance Summary 10CFR2(

Ist Qtr.

2' Qtr.

3rd Q 4.5-4 mrem/year 100 mrem/year 0.0000045 Itr 3.58e-4 4' Qtr 9.20e-5

% of Limit 0.0000045 TEDE 0

0 E-1.6

Table 3.4-1 Maximum Doses Resulting from Airborne Released Based on Concurrent Meteorological Data Zion Sta~tion~.. Uni I

DUSEMSM 0iE0OLT.IrIG 112UM AIORNai R-'L-UISES e'2 Q.A4Eý S0*)Ht QOil.h0 ThDRI) (.UDILP LUI:H SIUC01 IDi ArNnUAL GAM A79

'*fl~if'IL AERS0,1 600 Eiri.o 1 ii t 6.fto=~L064 III 0 L 0it ii 00ý lB t

u.000E.00i N s O UCW I

CAWitu 1N0E-6 N I 0.C~0I U

ii or A

ilO CFP, OT 3NA11P. -*2 Y*AAI0y ANIVI AP -

IOA uN'TA AIR i~z.Ni w0lo-iXLVw

,ae 0 C.RS APT I

QOAýMIiELY OB2XIO'Vui 2 (10 2.001 2 urn oo 2 201 20.0

5. -

6.06 TeenagerO~

Lun CR00 (CAL Af0f10*AO 00110010200 CROO.OCAL CINOAN 2.zul 100000 opippOp NatO RICONO 0100 IOow top 001(0. 2 01000-2 DV0.~o tot C-10'01200YoO:

OI20,PŽ020 E-1.7

Table 3.4-1 (continued)

Maximum Doses Resulting from Airborne Released Based on Concurrent Meteorological Data Zio.n tH U

jn,.. Unit Z

CRITICL PIE-ON H>JH0-~

AdultH B01110 0~"'6O0 (JAW~gH C H

~.00 H

t ooo'oo ir C H OHIH ii 0 H~ ~HH H H (~~HH; H

AhR H

AIYHE 0 OH0,C H

.9 U0F-0.

9 H 0tH~CH H

0 OhE'00 rd0~ i" UA O.OEUC j,!

N 0 L00fl 1, 71'KOF ~

H--

011910A PPS01 13 ICR ~H ~

HOE ~!VE 44 0 0900

~

H HO

, SCR 0 "PP.'

0. 06 0

.00

()

0H0 0.c Oo ~

~ ~ ~ ~ ~ ~~fo H 4ttho

-ýiH,4H

":H 40 3I;:. 2" E-1.8

APPENDIX F METEOROLOGICAL DATA

Zion Nuclear Station Period of Record: January -

March 2006 Stability Class -

Extremely Unstable 250Ft-33Ft Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 N

0 NNE 0

NE 0

ENE 0

E 0

ESE 0

SE 0

SSE 0

S 0

SSW 0

SW 0

WSW 2

W 0

WNW 0

NW 0

NNW 0

Variable 0

Total 2

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

> 24 0

2 6

0 0

3 25 3

1 0

5 5

6 0

0 10 4

0 0

0 2

1 0

0 0

4 4

0 0

0 2

6 0

0 0

1 0

0 2

0 0

0 6

1 0

0 4

6 6

2 0

6 16 8

2 0

10 15 10 0

0 9

21 13 0

0 2

31 4

0 0

1 11 3

0 0

0 Total 8

32 16 14 3

8 8

2 2

7 18 34 35 43 37 15 0

61 153 61 5

0 282 Hours of calm in this stability class:

Hours of missing wind measurements in this Hours of missing stability measurements in 0

stability class:

0 all stability classes:

0

Zion Nuclear Station Period of Record: January -

Stability Class - Moderately Unstable March 2006 250Ft-33Ft Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW Variable Total 1-3 0

0 0

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

> 24 Total 1

2 7

2 2

3 4

0 0

0 11

0.

5 0

6 0

2 0

5 0

1 3

1 1

0 0

1 0

0 0

5 1

0 2

2 3

0 0

0 1

6 7

1 0

0 1

0 0

1 5

3 2

2 2

2 0

1 3

0 11 0

4 0

0 6

6 3

0 0

11 0

0 0

2 16 0

1 0

19 6

4 1

0 0

11 0

0 18 4

11 3

0 0

38 56 23 6

0 123 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

Zion Nuclear Station Period of Record: January -

March 2006 Stability Class - Slightly Unstable

- 250Ft-33Ft Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

NNE NE ENE 0

2 16 6

1 0

25 0

2 8

1 0

0 11 1

1 4

0 1

1 0

0 0

2 E

0 2

4 1

0 2

1 7

4 8

7 0

0 0

0 ESE 0

5 SE 0

5 5

2 0

0 0

12 0

27 SSE 1

6 14 S

0 4

2 1

2 6

0 0

5 SSW SW WSW W

1 0

1 8

11 11 0

0 2

0 0

5 7

23 1

4 0

13 9

WNW NW NNW Variable Total 0

19 25 0

0 2

19 29 10 0

0 30 0

34 0

26 0

44 0

60 0

42 0

0 0

347 0

0 0

8 27 0

0 7

0 52 0

0 4

7 108 176 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

Hours of missing stability measurements in all stability classes:

0

Zion Nuclear Station Period of Record: January -

March 2006 Stability Class - Neutral Winds Measured at 250Ft-33Ft Delta-T (F) 35 Feet Wind Speed (in mph)

Wind Direction N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW Variable 1-3 4-7 3

4 2

1 3

2 1

2 2

3 1

5 4

6 10 9

0 18 17 5

4 4

8 23 30 22 23 18 13 9

34 30 23 0

8-12 13-18 19-24

> 24 29 11 0

0 27 11 0

0 8

12 4

0 27 10 3

0 6

5 0

0 9

8 0

0 8

4 0

0 22 3

1 0

12 0

0 0

21 2

0 0

18 11 0

0 11 11 5

1 31 12 2

0 19 12 0

0 21 22 0

0 14 4

0 0

Total 61 59 31 45 18 27 36 58 36 49 48 46 58 71 83 50 0

Total 58 281 283 138 15 1

776 Hours of calm in this stability class:

Hours of missing wind measurements in this Hours of missing stability measurements in 0

stability class:

0 all stability classes:

0

Zion Nuclear Station Period of Record: January -

March 2006 Stability Class - Slightly Stable Winds Measured at 250Ft-33Ft Delta-T (F) 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 N

3 9

2 0

NNE 1

3 2

0 NE 2

2 4

1 ENE 3

2 7

3 E

1 3

3 1

ESE 0

0 5

1 SE 2

13 1

1 SSE 6

15 13 2

S 8

39 12 2

SSW 12 14 7

1 SW 11 8

2 0

WSW 12 15 7

0 W

5 12 2

1 WNW 7

24 0

0 NW 7

23 2

0 NNW 4

20 2

0 Variable 0

0 0

0 19-24

> 24 0

0 0

0.

0 0

Total 14 6

9 15 8

6 17 36 61 34 21 34 20 31 32 26 0

Total 84 202 71 13 0

0 370 0

Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

Hours of missing stability measurements in all stability classes:

0

Zion Nuclear Station Period of Record: January - March 2006 Stability Class - Moderately Stable

- 250Ft-33Ft Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

NNE 1

2 0

0 1

1 0

NE 0

0 ENE E

ESE 0

0 0

1 0

0 0

0 3

3 2

1 0

SE 0

0 1

1 4

1 1

0 0

2 5

SSE S

SSW 7

11 0

0 1

0 0

19 0

26 1

16 SW 3

5 8

0 4

2 8

0 0

1 0

0 0

4 9

WSW W

13 10 WNW NW NNW Variable Total 10 18 0

0 0

4 0

6 2

0 4

0 2

0 0

10 0

23 0

28 0

10 0

4 0

0 0

149 0

50 72 23 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

Hours of missing stability measurements in all stability classes:

0

Zion Nuclear Station Period of Record: January -

March 2006 Stability Class -

Extremely Stable 250Ft-33Ft Winds Measured at 35 Feet Delta-T (F)

Wind Speed (in mph)

Wind Direction N

NNE NE ENE E

ESE SE 1-3 0

0 0

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

> 24 Total 0

0 0

0 1

0 0

6 9

2 0

0 0

0 SSE S

SSW SW WSW W

0 1

6 6

1 1

0 0

3 4

2 0

0 4

3 0

0 0

4 0

0 0

6 1

0 0

10 WNW NW NNW Variable 0

0 4

0 0

1 0

0 0

0 Total 17 16 5

1 0

0 39 0

Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

Hours of missing stability measurements in all stability classes:

0

Zion Nuclear Station Period of Record: January - March 2006 Stability Class -

Extremely Unstable 250Ft-33Ft Winds Measured at 250 Feet Delta-T (F)

Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 1

6 3

5 2

17 NNE 0

0 7

14 1

3 25 NE 0

2 3

3 2

0 10 ENE 0

1 8

0 0

0 9

E 0

1 0

0 2

ESE 0

2 1

0 0

0 3

SE 0

1 7

2

.3 1

14 SSE 0

0 1

0 0

0 1

S 0

0 2

0 0

0 2

SSW 0

0 0

6 3

0 9

SW 0

1 3

5 4

2 15 WSW W

1 0

0 0

1 15 7

9 2

35 5

7 36 0

18 6

WNW 0

15 16 11 NW 0

NNW Variable 0

0 0

0 7

19 2

12 0

0 7

1 43 0

33 0

15 0

0 0

Total 1

10 95 94 51 18 269 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

14 Hours of missing stability measurements in all stability classes:

18

Zion Nuclear Station Period of Record: January -

March 2006 Stability Class - Moderately Unstable

- 250Ft-33Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 0

1 3

3 3

10 NNE 0

3 3

3 0

0 9

NE 0

1 0

3 0

0 4

ENE 0

0 0

E 0

0 0

1 0

1 2

ESE 0

0 1

0 0

0 1

SE 0

1 3

2 2

0 8

SSE 0

1 0

1 3

0 5

s 0

i 0

0 0

0 1

SSW 0

0 1

1 2

0 4

SW 0

0 5

2 1

2 10 WSW 0

0 0

4 1

1 6

W 0

2 5

2 2

2 13 WNW 0

0 2

14 2

1 19 NW 0

0 6

3 3

0 12 NNW 0

0 3

10 3

0 16 Variable 0

0 0

Total 0

9 30 49 22 10 120 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:

18

Zion Nuclear Station Period of Record: January - March 2006 Stability Class -

Slightly Unstable 250Ft-33Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 1

2 16 6

3 28 NNE 0

2 1

7 1

0 11 NE 0

5 0

0 0

2 7

ENE 1

1 1

1 0

0 4

E 0

0 0

2 2

1 5

ESE 0

2 3

0 0

1 6

SE 0

4 5

11 4

2 26 SSE 1

3 2

5 2

0 13 S

0 0

4 2

0 0

6 SSW 0

1 2

2 0

0 5

SW 1

3 6

5 8

4 27 WSW 1

2 5

18 8

2 36 W

0 2

8 9

11 1

31 WNW 0

2 19 26 11 0

58 NW 0

0 16 22 20 0

58 NNW 0

1 6

21 11 0

39 Variable 0

0 0

Total 4

29 80 147 84 16 360 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:

18

Zion Nuclear Station Period of Record: January - March 2006 Stability Class -

Neutral 250Ft-33Ft Winds Measured at 250 Feet Delta-T (F)

Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW Variable 16 14 5

9 2

4 21 21 10 17 15 9

6 18 18 21 0

16 30 5

16 3

6 12 13 15 16 21 13 26 21 29 22 0

12 19 11 12 9

7 10 4

3 10 11 9

9 16 17 3

0 5

10 7

9 2

3 2

0 0

1 1

15 9

4 10 1

0 56 79 31 50 16 23 50 44 30 49 50 49 53 65 78 59 0

Total 6

65 206 264 162 79 782 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

24 Hours of missing stability measurements in all stability classes:

18

Zion Nuclear Station Period of Record: January -

March 2006 Stability Class -

Slightly Stable 250Ft-33Ft Winds Measured at 250 Feet Delta-T (F)

Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW Variable 12 5

2 0

1 1

4 12 9

11 13 6

3 4

8 6

0 2

1 2

1 7

3 9

16 12 9

10 10 7

18 12 25 0

1 1

2 4

2 5

2 15 7

6 2

5 1

0 0

22 11 8

12 16 10 22 53 35 29 30 24 14 22 22 33 0

Total 8

47 97 144 53 14 363 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

11 Hours of missing stability measurements in all stability classes:

18

Zion Nuclear Station Period of Record: January -

March 2006 Stability Class - Moderately Stable

- 250Ft-33Ft Delta-T (F)

Winds Measured at 250 Feet Wind Direction N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW Wind Speed (in mph) 4-7 8-12 13-18 19-24

> 24 Total 1-3 0

0 2

1 1

2 6

2 2

0 0

1 0

0 0

1 0

0 8

6 3

8 5

0 1

2 1

1 2

1 0

1 2

4 0

10 3

7 25 1

11 W

1 1

0 0

1 1

3 0

0 2

3 0

2 2

4 1

2 2

6 6

4 3

2 2

3 0

1 13 0

0 0

8 5

5 1

15 NW NNW Variable 2

3 2

5 0

0 7

0 17 0

10 0

0 2

0 0

0 Total 14 26 35 46 11 11 143 Hours of calm in Hours of missing Hours of missing this stability class:

wind measurements in this stability measurements in 0

stability class:

6 all stability classes:

18

Zion Nuclear Station Period of Record: January -

March 2006 Stability Class -

Extremely Stable 250Ft-33Ft Winds Measured at 250 Feet Delta-T (F)

Wind Speed (in mph)

Wind Direction N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW Variable 1-3 4-7 0

0 0

0 1

0 0

0 1

0 0

1 0

0 0

3 1

1 I

0 2

0 8-12 13-18 19-24

> 24 1

0 0

0 1

1 2

1 5

0 2

3 1

0 1

0 0

0 1

0 0

0 2

1 0

0 0

0 Total 1

1 0

0 1

1 0

3 11 7

2 1

1 2

1 5

0 Total 2

12 10 5

7 1

37 Hours of calm in this stability class:

Hours of missing wind measurements in this Hours of missing stability measurements in 0

stability class:

3 all stability classes:

18

Zion Nuclear Station Period of Record: April -

June 2006 Stability Class -

Extremely Unstable 250Ft-33Ft Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW Variable 1-3 4-7 0

0 0

0 1

0 0

1 11 19 7

11 9

4 2

0 1

2 4

6 4

1 1

0 8-12 13-18 19-24

> 24 8

5 0

0 38 24 0

0 20 0

0 0

3 0

0 0

3 0

0 0

4 0

0 0

1 0

0 0

1 0

0 0

4 2

0 0

9 3

0 0

12 0

0 0

21 4

0 0

12 14 0

0 8

1 0

0 2

3 0

0 0

0 Total 14 73 39 10 15 13 5

3 0

7 14 16 31 30 10 6

0 Total 1

83 146 this stability class:

56 0

0 286 Hours of calm in Hours of missing 0

wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

0

Zion Nuclear Station Period of Record: April - June 2006 Stability Class - Moderately Unstable

- 250Ft-33Ft Delta-T (F)

Winds Measured at 35 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 1

7 3

2 3

4 1

0 2

0 0

6 4

0 0

15 0

0 0

4 3

0 0

2 0

3 0

1 SE SSE S

SSW SW WSW W

WNW NW NNW Variable 1

2 2

0 0

4 1

1 1

2 0

0 0

2 0

0 0

3 0

8 4

0 0

3 3

0 0

2 0

0 6

3 0

0 0

65 Total 0

30 27 8

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

wind measurements in this stability measurements in 0

stability class:

0 all stability classes:

0

Zion Nuclear Station Period of Record: April - June 2006 Stability Class - Slightly Unstable

- 250Ft-33Ft Delta-T (F)

Winds Measured at 35 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 12 9

1 1

0 1

0 4

0 1

1 3

3 3

3.

2 0

24 23 8

5 5

6 7

8 1

3 1

5 9

7 7

4 0

Total 4

58 44 10 7

0 123 Hours of calm in this stability class:

Hours of missing wind measurements in this 0

stability class:

0 all stability classes:

Hours of missing stability measurements in 0

Zion Nuclear Station Period of Record: April -

June 2006 Stability Class - Neutral Winds Measured at 250Ft-33Ft Delta-T (F) 35 Feet Wind Speed (in mph)

Wind Direction N

NNE NE ENE E

ESE SE SSE S

S SW SW WSW W

WNW NW NNW Variable N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

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

> 24 3

31 28 15 1

0 5

15 55 13 12 1

1 14 7

0 0

0 7

6 2

1 0

0 2

8 1

0 0

0 6

6 6

3 4

1 3

26 8

1 0

0 5

24 22 1

0 0

3 10 9

2 0

0 4

5 10 3

1 0

3 12 21 2

0 0

3 15 9

1 0

0 3

14 18 2

0 0

2 15 11 14 1

0 4

21 5

5 0

0 4

10 8

5 0

0 0

0 Total 78 101 22 16 11 26 38 52 24 23 38 28 37 43 35 27 0

Total 58 232 220 68 19 2

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

0 wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

0

Zion Nuclear Station Period of Record: April -

June 2006 Stability Class - Slightly Stable Winds Measured at 250Ft-33Ft Delta-T (F) 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW Variable Total 4

6 5

3 2

4 3

6 9

12 6

5 4

10 7

6 0

29 22 13 7

8 9

17 25 56 11 9

19 29 43 25 8

0 8-12 13-18 19-24

> 24 5

1 0

0 5

0 0

0 3

0 0

0 2

5 3

0 2

0 0

0 4

4 4

0 12 5

0 0

37 11 0

0 12 5

0 0

7 1

0 0

1 0

0 0

2 0

0 0

4 0

0 0

3 0

0 0

0 1

0 0

1 0

0 0

Total 39 33 21 20 12 25 37 79 82 31 16 26 37 56 33 15 0

92 330 100 33 7

0 562 Hours of calm in Hours of missing this stability class:

0 wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

0

Zion Nuclear Station Period of Record: April -

June 2006 Stability Class - Moderately Stable

- 250Ft-33Ft Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

5 4

3 0

0 0

12 NNE 1

5 2

0 0

0 8

NE 3

4 1

0 0

0 8

ENE 3

2 0

0 0

0 5

E 2

3 0

0 0

0 5

ESE 2

3 2

0 0

0 7

SE 1

5 4

3 0

0 13 SSE 6

16 26 0

0 0

48 S

9 27 5

1 0

0 42 SSW 14 13 1

0 0

0 28 SW 9

7 0

0 0

0 16 WSW 8

7 0

0 0

0 15 W

15 20 0

0 0

0 35 WNW 12 28 0

0 0

0 40 NW 9

1 0

0 0

0 10 NNW 6

4 0

0 0

0 10 Variable 0

0 0

Total 105 149 44 4

0 0

302 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

Zion Nuclear Station Period of Record: April -

June 2006 Stability Class - Extremely Stable Winds Measured at 250Ft-33Ft Delta-T (F) 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 N

3 1

0 0

NNE 0

0 0

0 NE 0

0 4

0 ENE 1

2 0

0 E

0 1

1 0

ESE 0

1 2

1 SE 3

5 2

0 SSE 0

9 10 0

S 7

29 3

0 SSW 5

4 0

0 SW 12 9

0 0

WSW 6

3 0

0 W

14 11 0

0 WNW 5

5 0

0 NW 3

0 0

0 NNW 3

0 0

0 Variable

.0 0

0 0

19-24

> 24 0

0 0

0 Total 4

0 4

3 2

4 10 19 39 9

21 9

25 10 3

3 0

Total 62 80 22 1

0 0

165 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

Zion Nuclear Station Period of Record: April -

June 2006 Stability Class -

Extremely Unstable 250Ft-33Ft Winds Measured at 250 Feet Delta-T (F)

Wind Speed (in mph)

Wind Direction N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW Variable 1-3 4-7 0

0 0

0 0

0 4

9 2

8 4

7 0

1 0

0 0

1 0

0 0

0 8-12 13-18 19-24

> 24 3

15 6

0 29 26 15 0

12 9

0 0

4 0

1 0

4 1

1 0

5 2

0 0

4 0

0 0

1 5

2 0

4 5

4 0

4 8

2 0

14 13 9

0 5

8 13 1

3 7

5 0

0 0

Total 24

.74 30 7

14 11 11 0

1 8

13 14 37 27 15 0

0 Total 0

36 92 99 58 1

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

0 wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

51

Zion Nuclear Station Period of Record: April - June 2006 Stability Class - Moderately Unstable

- 250Ft-33Ft Winds Measured at 250 Feet Delta-T (F)

Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW Variable Total 9

10 7

1 1

3 2

3 0

2 8

3 4

2 6

4 0

0 15 17 23 10 0

65 Hours of calm in this stability class:

Hours of missing wind measurements in this Hours of missing stability measurements in 0

stability class:

0 all stability classes:

51

Zion Nuclear Station Period of Record: April - June 2006 Stability Class - Slightly Unstable

- 250Ft-33Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 N

1 1

3 7

9 6

NNE 0

4 9

2 5

1 NE 0

3 1

2 0

0 ENE 0

5 0

0 0

0 E

0 3

0 0

1 0

ESE 0

4 4

0 0

0 SE 0

3 2

1 0

0 SSE 0

1 5

3 0

0 S

0 1

0 0

SSW 0

2 0

1 0

0 SW 0

0 0

.1 0

0 WSW 0

0 2

3 0

0 W

0 3

3 3

0 0

WNW 0

0 2

4 1

1 NW 0

1 2

2 0

2 NNW 0

0 2

1 0

0 Variable 0

0 0

0 Total 27 21 6

5 4

8 6

9 1

3 1

5 9

8 7

3 0

Total 1

31 35 30 16 10 123 Hours of calm in this stability class:

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

0 bility classes:

51

Zion Nuclear Station Period of Record: April - June 2006 Stability Class -

Neutral 250Ft-33Ft Winds Measured at 250 Feet Delta-T (F)

Wind Speed (in mph)

Wind Direction 1-3 4-7 N

1 NNE NE 0

ENE 0

E 2

ESE 1

SE 2

SSE 0

s 0

SSW 0

SW 1

WSW 0

W 1

WNW 0

NW 0

NNW 1

Variable 0

4 7

9 10 4

2 15 11 2

2 3

5 4

2 6

3 0

8-12 13-18 19-24

> 24 21 26 21 8

11 34 27 19 3

7 2

0 4

0 1

1 3

1 1

1 6

7 3

5 22 12 1

5 15 16 4

1 4

6 1

3 3

9 7

3 6

15 6

1 9

12 0

1 10 18 7

0 11 13 9

13 15 7

7 2

7 7

2 2

0 0

Total 81 99 21 16 12 24 57 47 16 24 32 27 40 48 37 22 0

Total 10 89 150 190 99 65 603 Hours of calm in this stability class:

Hours of missing wind measurements in this Hours of missing stability measurements in 0

stability class:

2 all stability classes:

51

Zion Nuclear Station Period of Record: April -

June 2006 Stability Class -

Slightly Stable 250Ft-33Ft Winds Measured at 250 Feet Delta-T (F)

Wind Speed (in mph)

Wind Direction 1-3 4-7 N

1 NNE 4

NE 0

ENE 1

E 0

ESE 0

SE 3

SSE 1

S 2

SSW 1

SW 0

WSW 0

W 0

WNW 0

3 10 13 5

4 1

3 8

4 4

4 6

0 6

2 3

0 8-12 13-18 19-24

> 24 Total 14 17 3

0 38 11 9

1 0

35 12 8

2 0

35 4

0 2

7 19 1

6 2

1 14 6

6 2

10 25 10 17 12 11 56 22 44 12 11 98 9

20 9

3 47 4

13 3

1 26 8

5 0

0 17 6

15 2

0 29 7

13 5

0 25 10 35 2

0 53 6

27 0

1 37 6

8 0

0 17 0

0 0

NW NNW Variable Total 0

0 14 76 136 243 57 45 571 Hours of calm in this stability class:

Hours of missing wind measurements in this Hours of missing stability measurements in 0

stability class:

2 all stability classes:

51

Zion Nuclear Station Period of Record: April -

June 2006 Stability Class - Moderately Stable

- 250Ft-33Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW Variable 1-3 4-7 1

0 2

0 0

2 1

1 2

0 1

0 0

0 1

0 0

3 4

5 0

1 1

2 6

6 1

0 2

1 2

2 2

0 8-12 11 1

5 2

1 2

6 9

16 7

11 14 3

5 6

8 0

13-18 19-24

> 24 Total 6

2 0

2 1

0 10 15 26 9

3 3

10 11 11 3

0 21 10 12 6

4 10 27 44 55 17 15 19 18 18 20 13 0

Total 11 38 107 112 35 6

309 Hours of calm in this stability class:

Hours of missing wind measurements in this Hours of missing stability measurements in 0

stability class:

0 all stability classes:

51

Zion Nuclear Station Period of Record: April -

June 2006 Stability Class -

Extremely Stable 250Ft-33Ft Winds Measured at 250 Feet Delta-T (F)

Wind Speed (in mph)

Wind Direction N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW Variable 1-3 4-7 8-12 13-18 19-24 0

0 0

1 1

3 1

0 1

0 0

2 1

0 0

1 2

2 1

2 0

2 5

0 2

1 5

3 1

2 0

0 3

3 0

1 0

0 1

2 8

12 5

0 3

4 1

3 0

0 0

0 1

0 2

1 4

31 10 8

1 1

2 2

0 0

0 1

0 2

1 10 11 0

0 0

0

> 24 0

0 0

2 0

3 1

1 0

0 0

Total 4

5 2

6 2

8 7

16 51 24 15 6

7 9

6 3

0 Total 10 29 46 63 16 7

171 Hours of calm in this stability class:

Hours of missing wind measurements in this Hours of missing stability measurements in 0

stability class:

1 all stability classes:

51

Zion Nuclear Station Period of Record: July -

September 2006 Stability Class -

Extremely Unstable 250Ft-33Ft Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW Variable 1-3 4-7 0

0 0

0 1

1 0

0 0

0 2

0 0

3 15 45 24 17 26 24 12 1

1 5

7 3

7 5

0 0

8-12 13-18 19-24

> 24 3

1 0

0 50 1

0 0

28 0

0 0

4 0

0 0

1 0

0 0

7 0

0 0

11 0

0 0

31 0

0 0

2 0

0 0

37 14 0

0 22 4

0 0

10 0

0 0

5 0

0 0

8 0

0 0

3 0

0 0

Total 7

66 73 28 19 34 35 43 3

1 56 33 15 12 13 3

0 Total 4

195 222 20 0

0 441 Hours of calm in this stability class:

Hours of missing wind measurements in this Hours of missing stability measurements in 0stability class:

0 all stability classes:

0

Zion Nuclear Station Period of Record: July - September 2006 Class - Moderately Unstable

- 250Ft-33Ft Delta-T (F)

Stability Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction N

1-3 0

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

> 24 Total 2

8 5

4 NNE NE ENE E

ESE SE SSE S

SSW 0

1 1

0 0

1 0

0 0

6 1

6 3

1 0

0 0

0 2

0 8

2 0

5 3

8 3

4 0

1 0

0 13 0

7 0

10 0

3 0

2 0

8 0

13 0

3 0

2 0

8 0

6 0

2 0

6 0

0 0

1 SW WSW W

WNW NW NNW Variable Total 1

2 3

1 1

0 0

4 5

3 1

5 0

3 1

0 0

4 50 39 6

0 99 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

Zion Nuclear Station Period of Record: July -

September 2006 Stability Class - Slightly Unstable

- 250Ft-33Ft Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW Variable 1-3 4-7 0

0 2

0 3

2 0

1 0

0 1

0 0

2 7

8 4

3 2

7 6

4 2

3 10 3

3 3

0 0

8-12 13-18 19-24

> 24 4

0 0

0 5

1 0

0 4

0 0

0 2

0 0

0 3

2 0

0 0

0 1

0 0

0 4

0 2

0 1

0 0

0 1

1 0

0 15 5

0 0

3 0

0 0

5 0

0 0

3 0

0 0

3 0

0 0

2 0

0 0

Total 6

13 14 6

11 4

8 13 5

4 24 13 8

6 6

2 0

Total 9

67 56 9

2 0

143 Hours of calm in this stability class:

Hours of missing wind measurements in this Hours of missing stability measurements in 0

stability class:

0 all stability classes:

0

Zion Nuclear Station Period of Record: July - September 2006 Stability Class - Neutral

- 250Ft-33Ft Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

7 30 17 1

0 0

55 NNE 7

29 32 0

0 0

68 NE 8

12 17 3

0 0

40 ENE 7

20 35 9

0 0

71 E

5 11 23 6

0 0

45 ESE 12 12 10 4

0 0

38 SE 3

27 12 5

0 0

47 SSE 3

21 30 9

3 0

66 S

6 35 9

2 0

0 52 SSW 1

25 10 0

0 0

36 SW 2

30 36 2

0 0

70 WSW 4

22 11 0

0 0

37 W

5 16 9

0 0

0 30 WNW 2

14 10 1

0 0

27 NW 9

17 1

0 0

0 27 NNW 6

17 13 0

0 0

36 Variable 0

0 0

Total 87 338 275 42 3

0 745 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

Zion Nuclear Station Period of Record: July -

Stability Class -

Slightly Stable Winds Measured at Wind Speed Wind September 2006 250Ft-33Ft Delta-T (F) 35 Feet (in mph)

Direction 1-3 4-7 N

9 NNE 4

NE 9

ENE 2

E 2

ESE 2

SE 8

SSE 12 S

10 SSW 17 SW 17 WSW 3

W 16 WNW 10 NW 11 NNW 4

Variable 0

13 4

6 2

0 1

5 13 32 36 26 26 18 17 30 19 0

248 8-12 13-18 19-24

> 24 1

0 0

0 3

0 0

0 5

0 0

0 6

0 0

0 3

0 0

0 5

1 0

0 10 1

0 0

2 0

0 0

Total 23 11 20 4

2 3

13 31 45 59 54 31 34 27 41 23 0

Total 136 35 2

0 0

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

0 wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

0

Zion Nuclear Station Period of Record: July -

September 2006 Stability Class -

Moderately Stable 250Ft-33Ft Winds Measured at 35 Feet Wind Speed (in mph)

Wind Delta-T (F)

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

> 24 N

4 2

0 0

NNE 0

1 0

0 0

0 NE 2

1 0

0 0

0 ENE 2

0 0

0 E

0 0

ESE 1

1 0

0 0

0 SE 0

1 0

0 0

0 SSE 2

3 0

0 0

0 S

5 6

0 0

SSW 23 9

0 0

SW 28 9

0 0

WSW 19 9

0 0

W 16 12 0

0 0

0 WNW 19 11 0

0 0

0 NW 2

7 0

0 0

0 NNW 4

3 0

0 0

0 Variable 0

0 0

0 Total 6

1 3

2 0

2 1

5 11 32 37 28 28 30 9

7 0

Total 127 75 0

0 0

0 202 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

Zion Nuclear Station Period of Record: July -

Stability Class - Extremely Stable Winds Measured at Wind Speed Wind September 2006 250Ft-33Ft 35 Feet Delta-T (F)

(in mph)

Direction N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW Variable N

NNE NE ENE E

ESE SE S SE S

S SW SW WSW W

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

> 24 0

0 0

0 1

0 0

0 6

0 0

0 10 6

0 0

20 15 0

0 0

0 20 26 0

0 0

0 23 6

0 0

2 0

0 0

1 0

0 0

Total 0

1 0

0 0

6 16 35 46 29 2

1 0

Total 83 53 0

0 0

0 136 0

Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

Hours of missing stability measurements in all stability classes:

0

Zion Nuclear Station Period of Record: July -

September 2006 Stability Class -

Extremely Unstable 250Ft-33Ft Winds Measured at 250 Feet Delta-T (F)

Wind Speed (in mph)

Wind Direction N

NNE 1-3 0

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

> 24 Total 3

2 1

2 4

30 34 NE ENE 1

14 34 16 2

1 16 11 E

ESE SE SSE S

SSW SW WSW W

WNW 0

0 0

0 1

0 0

8 8

8 14 7

44 2

16 0

1 1

1 3

1 1

7 7

1 0

0 3

1 0

0 0

7 0

70 0

67 0

32 0

17 0

23 0

61 0

26 0

0 2

2 2

28 15 9

19 11 2

2 1

1 0

0 2

48 1

42 0

13 0

13 2

6 6

5 6

3 1

NW NNW Variable Total 7

0 0

15 2

1 0

0 0

0 3

68 190 137 40 3

441 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

Zion Nuclear Station Period of Record: July - September 2006 Stability Class - Moderately Unstable

- 250Ft-33Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 N

0 NNE 0

NE 1

ENE 0

E 0

ESE 0

SE 0

SSE 0

S 0

SSW 0

SW 1

WSW 0

W 0

WNW 0

NW 0

NNW 0

Variable 0

1 3

4 3

3 4

0 4

0 1

0 0

0 1

0 0

0 8-12 13-18 19-24

> 24 4

2 0

1 5

3 0

0 1

2 0

0 2

1 1

0 0

1 0

0 1

0 0

0 4

1 1

0 8

2 0

0 1

1 0

0 0

1 0

0 1

3 3

1 2

4 2

0 3

3 0

0 0

3 0

0 1

3 0

0 0

1 0

0 0

0 Total 8

I1 8

7 4

5 6

14 2

2 9

8 6

4 4

1 0

Total 2

24 33 31 7

2 99 0

Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

Hours of missing stability measurements in all stability classes:

0

Zion Nuclear Station Period of Record: Jul' September 2006 Stability Class - Slightly Unstable

- 250Ft-33Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW Variable Total 1-3 0

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

> 24 Total 1

3 2

1 0

7 0

0 0

1 0

0 0

4 1

4 4

4 2

4 4

1 0

13 6

0 0

9 2

0 0

10 2

10 0

3 0

0 3

0 0

0 4

9 4

1 2

7 4

2 1

1 2

1 0

0 1

3 2

2 11 1

0 7

0 1

4 2

2 12 3

22 0

14 3

7 0

2 2

5 0

2 2

0 2

0 1

3 4

2 0

0 0

0 7

7 6

3 0

0 0

1 30 44 48 12 8

143 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

0 Hours of missing stability measurements in all stability classes:

0

Zion Nuclear Station Period of Record: July - September 2006 Stability Class - Neutral 250Ft-33Ft Delta-T (F),

Winds Measured at 250 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 8

10 8

13 10 7

6 3

7 3

2 5

6 1

6 2

0 17 15 9

11 6

5 24 20 22 9

17 7

9 5

11 17 0

14 28 21 24 19 7

14 16 18 19 45 29 10 16 6

15 0

9 12 3

7 23 11 11 8

3 0

7 4

4 4

0 1

0 49 67 43 59 68 31 61 52 53 32 71 45 29 27 23 35 0

Total 9

97 204 301 107 27 745 Hours of calm in Hours of missing this stability class:

wind measurements in this 0

stability class:

2 all stability classes:

Hours of missing stability measurements in 0

Zion Nuclear Station Period of Record: July -

September 2006 Stability Class -

Slightly Stable 250Ft-33Ft Winds Measured at 250 Feet Delta-T (F)

Wind Speed (in mph)

Wind Direction N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW Variable Total 1-3 1

0 2

0 0

2 0

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

> 24 Total 2

9 4

6 6

1 9

9 6

8 7

5 0

6 8

6 1

6 0

6 2

0 16 0

23 0

21 0

13 2

1 0

0 0

0 7

0 0

9 9

10 1

1 0

1 1

0 0

0 2

0 4

27 18 0

5 11 29 0

5 18 19 8

2 14 19 1

0 17 0

30 0

50 0

45 2

53 0

37 0

18 0

28 0

29 0

32 0

0 2

428 2

9 7

0 0

11 16 1

6 10 13 0

2 11 17 0

0 0

169 14 11 72 160 Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

1 Hours of missing stability measurements in all stability classes:

0

Zion Nuclear Station Stability Period of Record: July - September 2006 Class - Moderately Stable 250Ft-33Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW Variable 1-3 1

0 1

1 1

3 0

0 0

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

> 24 Total 3

0 2

2 2

8 4

4 2

4 0

1 4

1 0

0 0

1 0

0 0

0 9

2 8

4 4

1 0

0 0

0 15 1

1 0

0 0

6 3

10 5

9 3

0 1

5 12 8

0 0

.0 3

2 4

0 7

15 0

14 0

17 0

26 0

23 0

21 0

23 0

19 2

3 3

0 2

0 6

13 0

8 10 2

3 1

1 0

9 1

6 0

3 2

0 0

0 9

0 12 0

0 Total 17 45 73 72 5

0 212 Hours of calm in this stability class:

Hours of missing wind measurements in this Hours of missing stability measurements in 0

stability class:

1 all stability classes:

0

Zion Nuclear Station Period of Record: July - September 2006 Stability Class -

Extremely Stable 250Ft-33Ft Winds Measured at 250 Feet Delta-T (F)

Wind Speed (in mph)

Wind Direction N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

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

> 24 Total 1

2 5

0 1

1 1

0 4

0 5

1 4

1 7

0 2

6 3

6 0

0 0

0 2

0 8

1 0

3 0

6 0

2 0

1 0

5 0

8 0

7 0

8 0

11 0

15 0

21 0

19 0

12 0

5 0

2 0

0 0

132 2

4 1

10 2

10 6

4 1

4 2

0 0

1 0

0 7

0 6

1 3

0 0

7 41 46 32 6

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:

0

Zion Nuclear Station Period of Record: October -

December2006 Class -

Extremely Unstable 250Ft-33Ft Stability Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 0

1 1

3 0

0 2

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW 0

1 10 0

0 14 0

2 0

1 0

0 0

13 4

0 0

0 2

0 0

0 2

0 0

0 6

1 0

0 0

15 0

4 0

0 0

1 0

0 0

0 4

2 0

2 1

0 0

0 10 1

0 4

4 0

2 14 0

0 0

1 0

8 8

2 2

6 1

1 0

0 0

0 11 0

10 0

22 0

9 0

10 0

0 3

0 Variable Total 0

0 0

30 66 15 0

111 0

Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

Hours of missing stability measurements in all stability classes:

0

Zion Nuclear Station Period of Record: October -

December2006 Stability Class - Moderately Unstable Winds Measured at 3.

250Ft-33Ft Delta-T (F) 5 Feet Wind Speed (in mph)

Wind Direction N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW Variable Total 1-3 0

0 0

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

> 24 Total 1

0 2

3 1

1 0

0 0

0 3

0 0

1 0

0 0

1 0

5 0

2 0

0 0

3 0

1 0

5 0

1 0

3 0

7 0

12 0

10 2

3 0

1 0

3 1

1 3

1 1

5 6

6 1

5 1

0 0

7 1

0 0

17 35 0

61 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

Zion Nuclear Station Period of Record: October -

December2006 Stability Class -

Slightly Unstable 250Ft-33Ft Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

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

> 24 0

0 4

7 3

0 0

5 2

0 0

1 0

4 0

0 0

1 1

1 0

0 0

2 1

0 0

0 1

3 1

0 0

2 2

3 0

0 0

1 2

0 0

0 4

1 0

0 0

0 5

4 0

0 1

4 5

4 0

0 0

9 6

1 0

0 0

3 12 6

0 0

0 8

3 1

0 0

0 1

6 0

0 0

Total 14 7

5 3

0 3

5 7

3 5

9 14 16 21 12 7

0 2

40 54 32 3

0 131 0

Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

Hours of missing stability measurements in all stability classes:

0

Zion Nuclear Station Period of Record: October -

December2006 Stability Class -

Neutral 250Ft-33Ft Winds Measured at 35 Feet Wind Speed (in mph)

Wind Delta-T (F)

Direction N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW Variable Total 1-3 3

2 1

1 1

2 4

3 2

3 4

6 7

2 0

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

> 24 Total 3

6 10 10 11 13 6

19 25 40 34 21 35 34 28 19 0

17 19 15 14 9

13 5

26 28 56 45 29 57 45 37 55 0

470 15 24 14 9

2 14 6

15 0

13 27 31 3

3 10 8

0 194 44 59 43 34 23 42 21 62 57 112 108 84 99 88 82 84 0

47 314 1

1042 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

Zion Nuclear Station Period of Record: October -

December2006 Stability Class -

slightly Stable 250Ft-33Ft Winds Measured at 35 Feet Wind Speed (in mph)

Wind Delta-T (F)

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 3

5 7

2 0

3 2

4 7

15 18 15 5

9 5

3 0

103 7

14 9

3 2

3 6

22 53 52 26 37 65 23 17 2

0 341 3

3 2

1 3

8 3

21 27 15 22 10 13 15 2

0 0

148 0

0 0

0 1

0 2

1 0

1 3

3 0

0 0

11 13 22 18 6

6 14 13 48 87 83 69 65 83 47 24 5

0 0

0 603 Hours of calm in Hours of missing this stability class:

wind measurements in this 0

stability class:

0 all stability classes:

Hours of missing stability measurements in 0

Zion Nuclear Station Period of Record: October -

December2006 Stability Class - Moderately Stable

- 250Ft-33Ft Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

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

> 24 Total 3

2 0

0 0

1 1

6 11 12 5

6 6

1 1

0

.2 1

0 0

0 9

39 21 8

6 3

2 0

3 0

1 1

0 1

0 4

8 0

0 0

0 6

4 0

1 0

2 1

15 53 32 20 11 9

8 1

4 0

Total 57 94 16 0

0 0

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

wind measurements in this 0

stability class:

0 all stability classes:

Hours of missing stability measurements in 0

Zion Nuclear Station Period of Record: October -

December2006 Stability Class - Extremely Stable

- 250Ft-33Ft Delta-T (F)

Winds Measured at 35 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 0

0 0

2 5

3 3

4 11 2

1 0

0 1

0 0

4 7

3 4

8 18 4

1 0

0 Total 17 31 2

0 0

0 50 Hours of calm in Hours of missing this stability class:

wind measurements in this 0

stability class:

0 all stability classes:

Hours of missing stability measurements in 0

Zion Nuclear Station Period of Record: October -

December2006 Stability Class - Extremely Unstable 250Ft-33Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

0 0

0 1

2 0

3 NNE 0

1 3

7 2

0 13 NE 0

1 2

3 0

0 6

ENE 0

1 0

0 0

0 1

E 0

0 0

ESE 0

2 8

0 0

0 10 SE 0

1 10 0

0 0

11 SSE 0

0 0

S 0

0 0

SSW 0

0 0

1 0

0 1

SW 0

0 6

5 1

0 12 WSW 0

0 4

4 0

1 9

W 0

0 2

9 7

5 23 WNW 0

0 0

4 7

0 11 NW 0

0 3

7 1

0 11 NNW 0

0 0

Variable 0

0 0

Total 0

6 38 41 20 6

i1 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

Zion Nuclear Station Period of Record: October -

December2006 Stability Class - Moderately Unstable

- 250Ft-33Ft Winds Measured at 250 Feet Delta-T (F)

Wind Speed (in mph)

Wind Direction N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW Variable Total 1-3 0

0 0

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

> 24 Total 0

1 0

0 0

0 2

0 0

0 1

0 4

0 2

0 0

0 1

0 3

0 6

0 0

0 3

0 4

2 9

1 12 1

0 0

4 2

1 3

0 2

0 0

9 7

1 0

0 0

0 6

61 7

17 23 Hours of calm in this stability class:

Hours of missing wind measurements in this Hours of missing stability measurements in 0

stability class:

2 all stability classes:

3

Zion Nuclear Station Period of Record: October -

December2006 Stability Class -

Slightly Unstable 250Ft-33Ft Delta-T (F)

Winds Measured at 250 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

11 34 39 31 16 131 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

Zion Nuclear Station Period of Record: October -

December2006 Stability Class -

Neutral 250Ft-33Ft Winds Measured at 250 Feet Delta-T (F)

Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24

> 24 Total N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW Variable 2

I1 8

7 8

10 9

9 18 28 23 22 30 23 20 8

0 8

12 13 9

11 11 9

10 30 34 34 19 49 35 32 39 0

11 13 7

17 2

18 11 11 7

32 31 24 18 24 25 24 0

18 21 14 0

0 2

10 3

2 4

9 20 6

3 5

2 0

41 50 47 36 24 45 45 44 61 103 104 87 109 88 88 76 0

Total 6

67 226 355 275 119 1048 Hours of calm in Hours of missing this stability class:

wind measurements in this 0

stability class:

6 all stability classes:

Hours of missing stability measurements in 3

Zion Nuclear Station Stability Period of Record: October -

December2006 Class -

Slightly Stable 250Ft-33Ft Winds Measured at 250 Feet Delta-T (F)

Wind Direction N

NNE NE Wind Speed (in mph) 4-7 8-12 13-18 19-24

> 24 Total 1-3 0

3 1

2 0

0 0

1 10 1

2 8

8 1

10 1

ENE 1

0 0

2 1

4 3

0 E

7 0

2 6

3 6

ESE SE SSE S

SSW SW WSW W

WNW NW NNW Variable Total 1

3 3

10 11 3

14 12 13 0

12 0

18 0

14 1

13 7

22 3

31 1

43 0

71 0

77 2

71 2

48 0

92 0

53 1

27 4

9 40 18 3

22 43 9

4 15 31 18 5

18 15 8

6 23 55 8

1 12 28 12 4

5 0

0 4

0 0

0 3

48 165 7

10 2

0 0

6 0

0 17 605 265 107 Hours of calm in Hours of missing Hours of missing this stability class:

wind measurements in this stability measurements in 0

stability class:

10 all stability classes:

3

Zion Nuclear Station Period of Record: October -

December2006 Stability Class - Moderately Stable

- 250Ft-33Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction N

NNE NE ENE E

ESE SE SSE S

SSW SW WSW W

WNW NW NNW Variable Total Hours of calm in t Hours of missing v 1-3 4-7 8-12 13-18 19-24

> 24 1

1 0

3 0

0 0

0 2

1 0

0 0

3 0

0 0

0 2

0 0

0 2

0 0

0 1

1 0

0 0

1 0

1 1

0 1

0 9

7 3

0 0

0 8

29 13 0

1 4

14 17 3

0 0

2 7

2 1

0 0

2 1

4 1

0 1

2 4

6 0

0 1

1 0

0 0

1 0

1 1

0 0

2 0

0 0

0 Total 5

3 3

2 2

3 3

20 50 39 12 8

13 3

3 4

0 6

19 51 73 23 1

173 this stability class:

0 iind measurements in this stability class:

6 Hours of missing stability measurements in all stability classes:

3

Zion Nuclear Station Period of Record: October -

December2006 Stability Class - Extremely Stable

- 250Ft-33Ft Delta-T (F)

Winds Measured at 250 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 8-12 13-18 N

0 3

0 0

NNE 0

1 0

0 NE 0

0 0

0 ENE 0

0 0

0 E

0 0

ESE 0

1 0

0 SE 0

0 0

0 SSE 0

0 2

0 S

0 0

3 5

SSW 1

0 2

2 SW 1

0 0

1 WSW 1

1 1

0 W

1 2

0 6

WNW 1

0 0

3 NW 0

1 0

2 NNW 0

1 0

0 Variable 0

0 0

0 19-24

> 24 0

0 0

0 1

1 1

0 1

0 3

0 1

0 0

0 Total 3

1 0

0 0

1 0

3 10 6

3 6

10 4

3 1

0 Total 5

10 8

19 8

1 51 0

Hours of calm in this stability class:

0 Hours of missing wind measurements in this stability class:

Hours of missing stability measurements in all stability classes:

3

APPENDIX G ANNUAL RADIOLOGICAL GROUNDWATER PROTECTION PROGRAM REPORT (ARGPPR)

Table Of Contents I. Sum m ary and Conclusions..........................................................................................

1 II. In tro d u c tio n........................................................................................................................

4 A. O bjectives of the RG PP..................................................................................

4 B. Im plem entation of the O bjectives....................................................................

4 C. Program Description........................................................................................

5 D. Characteristics of Tritium (H-3).........................................................................

6 Ill. Program Description..........................................................................................................

6 A. Sam ple Analysis...............................................................................................

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

7 C. Background Analysis........................................................................................

8

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

9 A. G roundwater Results......................................................................................

11 B. Drinking W ater W ell Survey...........................................................................

12 C. Summary of Results - Inter-laboratory Comparison Program.......................

12 D. Leaks, Spills, and Releases............................................................................

12 E. Trends............................................................................................................

12 F. Investigations..................................................................................................

12 G. Actions Taken..................................................................................................

12

Appendices Appendix A Tables Table A-1:

Location Designation Radiological Groundwater Protection Program - Sampling Locations, Distance and Direction, Zion Nuclear Power Station, 2006 Figures Figure A-i:

Appendix B Tables Table B-1.1 Table B-1.2 Table B-1.3 Table B-1.4 Table B-1.5 Table B-1.6 Radiological Groundwater Protection Program Groundwater and Surface Water Locations of the Zion Nuclear Power Station, 2006 Data Tables Concentrations of Tritium in Groundwater and Surface Water Samples Collected in the Vicinity of Zion Nuclear Power Station, 2006.

Highest to Lowest Concentrations of Tritium in Groundwater and Surface Water Samples Collected in the Vicinity of Zion Nuclear Power Station, 2006.

Concentrations of Strontium in Groundwater and Surface Water Samples Collected in the Vicinity of Zion Nuclear Power Station, 2006.

Highest to Lowest Concentrations of Strontium in Groundwater and Surface Water Samples Collected in the Vicinity of Zion Nuclear Power Station, 2006.

Concentrations of Gamma Emitters in Groundwater and Surface Water Samples Collected in the Vicinity of Zion Nuclear Power Station, 2006.

Highest to Lowest Concentrations of Gamma Emitters in Groundwater and Surface Water Samples Collected in the Vicinity of Zion Nuclear Power Station, 2006.

ii

Table Of Contents I. Sum m ary and Conclusions................................................................................................

1 II. Introduction........................................................................................................................

4 A. O bjectives of the RG PP...................................................................................

4 B. Im plem entation of the O bjectives....................................................................

4 C. Program Description........................................................................................

5 D. Characteristics of Tritium (H-3)......................................................................

6 Ill. Program Description............................................................

............................................. 6 A. Sam ple Analysis................................................................................................

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

7 C. Background Analysis........................................................................................

8

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

9 A. G roundwater Results......................................................................................

11 B. Drinking W ater W ell Survey...........................................................................

12 C. Summary of Results - Inter-laboratory Comparison Program.......................

12 D. Leaks, Spills, and Releases............................................................................

12 E. Trends............................................................................................................

12 F. Investigations.................................................

,................................................ 12 G. Actions Taken.........................................

12

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 Zion Nuclear Power Station. This evaluation involved numerous station personnel and contractor support personnel. At Zion, 11 permanent groundwater monitoring wells and 4 temporarygroundwater monitoring wells were installed in 2006. Of these new monitoring locations, none were assigned to the station's Radiological Environmental Monitoring Program (REMP). The results for the monitoring wells 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 Zion Nuclear Power 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, 179 analyses were performed on 60 samples from 16 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 Zion Nuclear Power Station had been adversely impacted by any releases of radionuclides.

Phase 1 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 http:/Iwww exeloncorp com/ourcompanies/powergen/nuclearFiritium htm].

Phase 2 of the RGPP was conducted by Exelon corporate and station personnel; to initiate follow up of Phase 1 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 Zion Nuclear Power Station had no adverse radiological impact on the environment, and there are no known active releases into the groundwater at Zion Nuclear Power 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. In the case of tritium, Exelon specified that it's 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 (pCi/L) 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 15 groundwater monitoring locations. The tritium concentrations ranged from 261 +/- 124 pCi/L to 586 +/- 141 pCi/L. The tritium that was detected in groundwater at the Station is on the west side of the Turbine building and is believed to be the result of isolated historical releases and/or background from external sources greater than 200 pCi/L.

Intentionally left blank II.

Introduction The Zion Nuclear Power Station (ZNPS), consisting of two 1100 MWt pressurized water reactor owned and operated by Exelon Corporation, is located in Zion, Illinois adjacent to Lake Michigan. Unit No. 1 went critical in December 1973. Unit No. 2 went critical in September 1974. The plant permanently ceased operation in January of 1998 and has been permanently defueled. The site is located in northeast Illinois on the western shore of Lake Michigan, approximately 50 miles north 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 Zion Nuclear Power Station as discussed below:

1.

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

http7/lwww exeloncorp. com/ourcompanies/powergen/nuclear/Tritiu

m. htm

2.

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

3.

Zion Nuclear Power Station will continue to perform routine sampling and radiological analysis of water from selected locations.

4.

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

5.

Zion Nuclear Power 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 and Figures A-1 and A-2, 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.

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-r 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.

Ill.

Program Description A.

Sample Analysis This section describes the general analytical methodologies used by TBE and EIML to analyze the environmental samples for radioactivity for the Zion Nuclear Power 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 Zion Nuclear Power Station becoming operational were used as a baseline with which these operational data were compared. For the purpose of this report, Zion Nuclear Power Station was considered operational at initial criticality.

Several factors were important in the interpretation of the data:

1.

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

2.

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

Statistically, the exact value of a measurement is expressed as a range with a stated level of confidence. The convention is to report results with a 95% level of confidence. The uncertainty comes from calibration standards, sample volume or weight measurements, sampling uncertainty and other factors. Exelon reports the uncertainty of a measurement created by statistical process (counting error) as well as all sources of error (Total Propagated Uncertainty or TPU). Each result has two values calculated.

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

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

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

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-1 40 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, marine life, and foodstuffs. The results of the monitoring were detailed in the report entitled, Environmental Radiological Monitoring for Zion Nuclear Power Nuclear Power Station, Commonwealth Edison Company, Annual Report 1973, May 1974.

The pre-operational REMP contained analytical results from samples collected from the surface water and groundwater.

Tritium levels in Lake Michigan water were studied in the vicinity of Zion Station throughout 1970. The concentration of tritium in the surface water samples from the Lake at Zion ranged from approximately 311 +/- 20 pCi/L to 374 +/- 34 pCi/L and averaged 340 pCi/L. There was no statistical difference in average tritium concentrations among the stations (eight stations from Kenosha to Waukegan).

Prior to 1998, surface water samples were collected at the following six locations along Lake Michigan:

Kenosha, Wisconsin (intake located 10 miles north of the station)

Lake County Public Water District (intake located 1.1 miles north of the Station)

Waukegan, Illinois (intake located 6 miles south of the Station)

North Chicago, Illinois (intake located 10 miles south of the Station)

Great Lakes NTS (intake located 13 miles south of the Station)

Lake Forest, Illinois (intake located 16.5 miles south of the Station)

After 1998, surface water samples were collected at the following four locations along Lake Michigan:

Kenosha, Wisconsin (intake located 10 miles north of the station)

Lake County Public Water District (intake located 1.1 miles north of the Station)

" Waukegan, Illinois (intake located 6 miles south of the Station)

Lake Forest, Illinois (intake located 16.5 miles south of the Station)

Lake Michigan surface water data are collected as part of the REMP.

Tritium concentrations in surface water samples from Lake Michigan ranged from non-detect to 660 pCi/L.

Groundwater was collected from one off-site well on a quarterly basis.

Gamma isotopic, radiostrontium and tritium analyses were performed on all samples. Strontium-89, strontium-90, tritium and gamma emitters were below their respective LLDs.

1.

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

a.

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

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

b.

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

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

c.

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

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

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

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

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

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

IV.

Results and Discussion A.

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

Tritium Samples from all locations were analyzed for tritium activity (Table B-1.1 and B-1.2, Appendix B). Tritium values ranged from the detection limit to 586 pCi/l. Within the station boundary, concentrations of tritium in shallow groundwater reached 586 pCi/L.

.Zion Nuclear Power;Station does not have any off-site wells and therefore there is no risk to off-site users.

Concentrations detected were consistent with those detected in REMP samples OR some other wording (if graphs, then Figure B-1, Appendix C).

Strontium Strontium-90 was detected in four samples at concentrations of 1.3, 1.6, 1.8, and 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).

Gamma Emitters and Strontium Potassium-40 was detected in 15 of 60 samples. The concentrations ranged from 25 pCi/liter to 107 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 Zion Nuclear Power Station.

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 There were no leaks, spills or releases.

E.

Trends There are no previously identified plumes therefore there are no trends.

F.

Investigations Conclusions from the Phase 1 report have been made available to state and federal regulators as well as the public on an Exelon web site:

httpIllwww exeloncop. com/ourcom pan ies/powergen/nuclear/Triti um. htm.

G.

Actions Taken

1. Compensatory Actions There have been no station events requiring compensatory actions at the Zion Nuclear Power Station.

2. Installation of Monitoring Wells No new wells were required to be installed.

3. Actions to Recover/Reverse Plumes There have been no station events requiring actions to recover/reverse any plumes.

APPENDIX A LOCATION & DIRECTION

ATTACHMENT 1:

Sampling Locations for the Radiological Groundwater Protection Program, Zion Station, 2006.

Site MW-ZN-0IS MW-ZN-02S MW-ZN-03S MW-ZN-04S MW-ZN-05S MW-ZN-06S MW-ZN-07S MW-ZN-08S MW-ZN-09S MW-ZN-100 MW-ZN-101 MW-ZN-102 MW-ZN-103 MW-ZN-10S MW-ZN-11S SW-ZN-1 Site Type Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Monitoring Well Surface Water Temporary/Permanent Permanent Permanent Permanent Permanent Permanent Permanent Permanent Permanent Permanent Temporary Temporary Temporary Temporary Permanent Permanent Lake Michigan Distance On-Site On-Site On-Site On-Site On-Site On-Site On-Site On-Site On-Site On-Site On-Site On-Site On-Site On-Site On-Site On-Site A-I

Figure A-4 Radiological Ground Water Protection Program Groundwater and Surface Water Locations of the Zion Station, 2006 A-2

APPENDIX B DATA TABLES

TABLE B-I.1 CONCENTRATIONS OF TRITIUM IN GROUNDWATER AND SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF ZION NUCLEAR POWER STATION, 2006 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA SITE MW-ZN-01S(L)

MW-ZN-01S(L)

MW-ZN-01S(U)

MW-ZN-02S(L)

MW-ZN-02S(U)

MW-ZN-03S(L)

MW-ZN-03S(U)

MW-ZN-03S(U) DUP MW-ZN-03S(U)

MW-ZN-04S(L)

MW-ZN-04S(U)

MW-ZN-05S(L)

MW-ZN-O5S(U)

MW-ZN-05S(U)

MW-ZN-06S(L)

MW-ZN-06S(U)

MW-ZN-07S(L)

MW-ZN-07S(U)

MW-ZN-08S(L)

MW-ZN-08S(U)

MW-ZN-09S MW-ZN-09S DUP MW-ZN-09S MW-ZN-100 MW-ZN-100 MW-ZN-101 MW-ZN-101 MW-ZN-102 MW-ZN-102 MW-ZN-103 MW-ZN-103 MW-ZN-10S(L)

MW-ZN-10S(L)

COLLECTION DATE 05/26/06 10/26/06 10/26/06 05/26/06 10/26/06 10/26/06 05/26/06 10/26/06 05/26/06 10/26/06 05/25/06 10/26/06 Org 05/25/06 Dup 05/25/06 10/26/06 05/24/06 10/26/06 05/24/06 10/26/06 05/26/06 10/26/06 05/26/06 10/26/06 05/25/06 10/26/06 05/26/06 10/26/06 05/25/06 10/25/06 10/25/06 05/24/06 10/25/06 10/25/06 05/24/06 10/24/06 05/24/06 10/24/06 Org 05/26/06 Dup 05/26/06 10/27/06 07/17/06 10/25/06 07/17/06 10/25/06 07/17/06 10/24/06 07/17/06 10/25/06 07/28/06 10/27/06 586 +/- 141

< 180

< 190 261 +/- 124

185

182

173

182

168

190

162

186

174

166

183

170

175

176

165

176

169

174

173

173

179

174

175

168

180

183

171

177

182

170

182

178

189

133

177

188

185

175

182

197

182

171

< 183

< 177

< 183

< 190

t

INDICATES DISTILLED ANALYSIS

TABLE B-I.1 CONCENTRATIONS OF TRITIUM IN GROUNDWATER AND SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF ZION NUCLEAR POWER STATION, 2006 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA SITE MW-ZN-1OS(U)

MW-ZN-10S(U) DUP MW-ZN-iOS(U)

MW-ZN-11S(L)

MW-ZN-11S(U)

SW-ZN-1 SW-ZN-1 COLLECTION DATE Ong 07/28/06 Dup 07/28/06 10/27/06 07/28/06 10/24/06 07/28/06 10/24/06 05/26/06 10/25/06 178 183 182 179 192 182 187 174 185

INDICATES DISTILLED ANALYSIS

TABLE B-1.2 HIGHEST TO LOWEST CONCENTRATIONS OF TRITIUM IN GROUNDWATER AND SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF ZION NUCLEAR POWER STATION, 2006 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA SITE MW-ZN-01S(L)

MW-ZN-01iS(U)

MW-ZN-101 MW-ZN-11S(L)

MW-ZN-01S(L)

MW-ZN-02S(U)

MW-ZN-10S(L).

MW-ZN-08S(U)

MW-ZN-09S MW-ZN-11 S(U)

MW-ZN-03S(L)

MW-ZN-0IS(U)

MW-ZN-100 SW-ZN-1 MW-ZN-03S(U)

MW-ZN-07S(L)

MW-ZN-103 MW-ZN-IOS(L)

MW-ZN-10S(U) DUP MW-ZN-01 S(U)

MW-ZN-02S(L)

MW-ZN-07S(U)

MW-ZN-08S(L)

MW-ZN-101 MW-ZN-102 MW-ZN-10S(U)

MW-ZN-1 1iS(U)

MW-ZN-01 S(L)

MW-ZN-07S(L)

MW-ZN-06S(L)

MW-ZN-11S(L)

MW-ZN-08S(U)

MW-ZN-iOS(U)

MW-ZN-07S(U)

MW-ZN-09S DUP MW-ZN-103 MW-ZN-04S(U)

MW-ZN-05S(L)

MW-ZN-04S(L)

MW-ZN-06S(U)

MW-ZN-100 MW-ZN-03S(U)

MW-ZN-05S(U)

MW-ZN-06S(U)

SW-ZN-1 MW-ZN-02S(L)

MW-ZN-05S(U)

MW-ZN-06S(L)

MW-ZN-07S(U)

MW-ZN-102 COLLECTION DATE 05/26/06 05/26/06 10/25/06 10/24/06 10126106 10/26/06 10/27/06 10/24/06 10127/06 10/24/06 10/26/06 10/26/06 07/17/06 10/25/06 10/26/06 10/25/06 07/17/06 07128106 Dup 07/28/06 10/26/06 10/26/06 10/25/06 10/24/06 07/17/06 07/17/06 10/27/06 07/28106 10/26/06 10/25/06 10/26/06 07/28/06 05/24/06 Orig 07/28/06 10/25/06 Dup 05/26/06 10/25/06 05/24/06 05/26/06 10/26/06 10/26/06 10125/06 Orig 05/25/06 05/26/06 05/26106 05/26/06 05126/06 10/26/06 05/25/06 05/24/06 10/24/06 586 261

197

192

190

190

190

189

188

< 187

186

185

185

185

183

183

< 183

183

183

182

< 182

182

182

< 182

182

182

< 182

180

180

179

< 179

178

178

177

< 177

177

176

176

175

< 175

175

174

174

174

< 174

173

173

< 173

171

171

+/- 141

+/- 124

INDICATES DISTILLED ANALYSIS

TABLE B-1.2 HIGHEST TO LOWEST CONCENTRATIONS OF TRITIUM IN GROUNDWATER AND SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF ZION NUCLEAR POWER STATION, 2006 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION DATE SITE MW-ZN-04S(L)

MW-ZN-08S(L)

MW-ZN-05S(L)

MW-ZN-02S(U)

MW-ZN-07S(L)

MW-ZN-03S(U) DUP MW-ZN-04S(U)

MW-ZN-03S(L)

MW-ZN-09S 05/24/06 05/24/06 10/26/06 05/26/06 05/25/06 Dup 05/25/06 10/26/06 05/25/06 Orig 05/26/06

< 170

170

169

< 168

< 166

< 165

< 162

< 133

INDICATES DISTILLED ANALYSIS

TABLE B-I.3 CONCENTRATIONS OF STRONTIUM IN GROUNDWATER AND SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF ZION NUCLEAR POWER STATION, 2006 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA COLLECTION DATE SITE MW-ZN-05S(U)

MW-ZN-06S(L)

MW-ZN-07S(U)

MW-ZN-08S(L) 05/26/06 05/25/06 05/24/06 05/24/06 1.9 +/- 0.8 1.8 +/- 0.7 1.3 +/- 0.6 1.6 +/- 0.7

TABLE B-I,4 HIGHEST TO LOWEST CONCENTRATIONS OF STRONTIUM IN GROUNDWATER AND SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF ZION NUCLEAR POWER STATION, 2006 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA SITE MW-ZN-05S(U)

MW-ZN-06S(L)

MW-ZN-08S(L)

MW-ZN-07S(U)

COLLECTION DATE 05/26/06 05/25/06 05/24/06 05/24/06 1.9 +/- 0.8 1.8 +/- 0.7 1.6 +/- 0.7 1.3 +/- 0.6

TABLE B-I.5 CONCENTRATIONS OF GAMMA EMITTERS IN GROUNDWATER AND SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF ZION NUCLEAR POWER STATION, 2006 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA SITE MW-ZN-0IS(L)

MW-ZN-01S(L)

MW-ZN-02S(L)

MW-ZN-02S(U)

MW-ZN-04S(L)

MW-ZN-06S(L)

MW-ZN-06S(U)

MW-ZN-07S(L)

MW-ZN-08S(U)

MW-ZN-09S MW-ZN-101 MW-ZN-10S(U)

MW-ZN-iOS(U)

SW-ZN-1 COLLECTION DATE 05/26/06 10/26/06 05/26/06 05/26/06 10/26/06 05/24/06 10/26/06 10/26/06 10/25/06 05/24/06 ORIG 10/27/06 10/25/06 07/28/06 BE-7 K-40 53 +/- 34 67 +/- 31 81 +/- 43 74 +/- 45 38 +/- 38 86 +/- 44 48 +/- 27 25 +/- 21 32 +/- 32 69 +/- 46 45 +/- 35 53 +/- 28 7:1 84 +/- 42 ORIG 10/27/06 67 +/- 40 05/26/06 107 +/- 48

TABLE B-1.6 HIGHEST TO LOWEST CONCENTRATIONS OF GAMMA EMITTERS IN GROUNDWATER AND SURFACE WATER SAMPLES COLLECTED IN THE VICINITY OF ZION NUCLEAR POWER STATION, 2006 RESULTS IN UNITS OF PCI/LITER +/- 2 SIGMA SITE SW-ZN-1 MVV-ZN-04S(L)

MW-ZN-10S(U)

MW-ZN-02S(L)

MW-ZN-02S(U)

MW-ZN-08S(U)

MW-ZN-01S(L)

MW-ZN-10S(U)

MW-ZN-01 S(L)

MW-ZN-101 MW-ZN-06S(L)

MW-ZN-09S MW-ZN-02S(U)

MW-ZN-07S(L)

MW-ZN-06S(U)

COLLECTION DATE 05/26/06 05/24/06 07/28/06 05/26/06 05/26/06 05/24/06 10/26/06 K-40 107 +/- 48 86 +/- 44 84 +/- 42 81 +/- 43 74 +/- 45 69 +/- 46 67 +/- 31 67 +/- 40 53 +/- 34 53 +/- 28 48 +/- 27 45 +/- 35 38 +/- 38 32 +/- 32 25 +/- 21 ORIG 10/27/06 05/26/06 10/25/06 10/26/06 ORIG 10/27/06 10/26/06 10/25/06 10/26/06

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