ML051220161

Submittal of 2004 Annual Radiological Environmental Operating Report

ML051220161
Person / Time
Site:	Zion  File:ZionSolutions icon.png
Issue date:	04/27/2005
From:	Daniels A Exelon Generation Co, Exelon Nuclear
To:	Document Control Desk, NRC/FSME
References
+kBR1SISP20051207
Download: ML051220161 (143)

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Exelkn.

Exelon Generation www.exeloncorp.com Nuclear Zion Station 101 Shiloh Boulevard Zion, IL 60099-2797 Tel 847-746-2084 April 27, 2005 U.S. Nuclear Regulatory Commission Attn: Document Control Washington D.C. 20555-0001 Zion Nuclear Power Station, Units 1 and 2 Facility Operating License Nos. DPR-39 and DPR-48 NRC Docket Nos. 50-295 and 50-304

Subject:

Submittal of Zion Nuclear Power Station, Unit 1 and 2 2004 Annual Radiological Environmental Operating Report.

In accordance with Technical Specification 5.7.2, "Annual Radiological Environmental Operating Report" Zion Station is submitting the 2004 Annual Radiological Environmental Operating Report for Unit 1 and 2.

Technical Specification 5.7.2 requires submittal of an Annual Radiological Environmental Operating Report before May 15 of each year. The attachment to this letter is the Annual Radiological Environmental Operating Report.

If you have any questions about this report, please contact Mr. Ron Schuster at 847-746-2084 extension 2700.

Respectfully, Artice Daniels Jr.

Decommissioning Plant Manager Zion Nuclear Station

Attachment:

2004 Annual Radiological Environmental Operating Report cc:

Regional Administrator - NRC Region III

ZION STATION ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT 2004 APRIL 2005 q]'

9,

TABLE OF CONTENTS Pace INTRODUCTION.............................................................................................................................. I SU MMA RY ....................................................................................................................................... ....................................

2 1.0 EFFLUENTS 1.1 Gaseous Effluents to the Atmosphere ................................. ...................................... 3 1.2 Liquid Released to Lake Michigan .............................  :.3 2.0 SOLID RADIOACTIVE WASTE .. 3 3.0 DOSE TO MAN 3.1 Gaseous Effluent Pathways . . .3 3.1.1 Noble Gases .. 3 3.1.1.1 GamaDoseRates .3 3.1.1.2 Beta Air and Skin Dose Rates .4 3.1.2 Radioactive Iodine .. 4 3.1.2.1 Dose to Thyroid .5 3.2 Liquid Effluent Pathways......................................................................................................... 5 3.3 Assessment of Dose to Member of Public . . .5 4.0 SITE METEOROLOGY .5 5.0 ENVIRONMENTAL MONITORING .6 5.1 Gamma Radiation .6 5.2 Airborne I-131 and Particulate Radioactivity .6 5.3 Aquatic Radioactivity .7 5.4 Sample Collections .7 5.5 Program Modifications .7 6.0 ANALYTICAL PROCEDURES .7 7.0 NEAREST RESIDENCE CENSUS .7 8.0 INTERLABORATORY COMPARISON PROGRAM RESULTS. 7 9.0 ERRATA DATA (if applicable)......................................................................................................... 8

TABLE OF CONTENTS (continued)

Page APPENDIX I - DATA TABLES AND FIGURES ............................................................................ 1-l Station Releases Table 1.1-1 Gaseous Effluents I-2 Table 1.2-1 Liquid Effluents .1-3 Table 2.0-1 Solid Radioactive Waste. I-4 Table 3.1-1 Maximum Doses Resulting from Airborne Releases .1-5 Table 3.2-1 Maximum Doses Resulting from Liquid Effluents............................................................................................... I-7 Table 3.3-1 10CFR20 Compliance Assessment .1-8 Table 3.4-1 Maximum Doses Resulting from Airborne Releases Based on Concurrent Meteorological Data. -9 Environmental Monitoring Figure 5.0-1 Inner Ring TLD and Fixed Air Sampling Stations .I-Il Figure 5.0-5 Fish, Water and Sediment Locations. I-12 Table 5.0-1 Radiological Environmental Monitoring Locations. I-13 Table 5.0-2 Radiological Environmental Monitoring Program Sample Location and Sample Collection Analyses ................................. 1-14 Table 5.0 Table 5.0-6 Radiological Environmental Monitoring Program Quarterly Summary .................................. I-17 APPENDIX II - METEOROLOGICAL DATA............................................................................................ II-1 APPENDIX III - 2004 REMP SAMPLE RESULTS ................... ......................................... III-1 APPENDIX IV - INTERLABORATORY COMPARISON PROGRAM RESULTS ................ .................. IV-1 APPENDIX V - ERRATA DATA (If applicable)......................................................................................... V-1 iii

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 2004 showed zero releases above background for a variety of monitored pathways, e.g. water, vegetation, air samples and TLDs.

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 (FB). 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, I-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 Zion 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 4.17E-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 I OCFR50 Appendix I, IOCFR20 and 40CFR190.

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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 0.00E+00 microcuries of fission and activation gases was released with a maximum average release rate of 0.OOE+00 [tCi/sec during any one quarter period.

A total of 0.00E+00 microcuries of 1-131 was released during the year with a maximum average quarterly release rate of O.00E+00 pCi/sec.

A total of 8.87E-Olmicrocuries of beta-gamma emitters was released as airborne particulate matter with a maximum average quarterly release rate of 5.64E-08 pCi/sec.,

quarterly only. Alpha-emitting radionuclides were not measurable. Also, 0.00E+00 curies of tritium were released with a maximum average quarterly release rate of O.OOE+00 gCi/sec.

1.2 Liquids Released to Lake Michigan A total of 2.95E+05 liters of radioactive liquid wastes containing 4.970E+03 microcuries (excluding tritium, noble gases and alpha) was discharged from the station after dilution with a total of 4.39E+10 liters of water. These wastes were released at a maximum quarterly average concentration of 3.62E-10 pCi/ml. A total of 4.07E-02 curies of tritium was released. Alpha activity released totaled 6.03 gCi 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 2004 Effluent Report.

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

3.1.1 Noble Gases 3.1.1.1 Gamma Dose Rates 3

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 noble 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 4.17E-05 mrem (child) 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 2.97E-06 mrem (Table 3.4-1). The maximum gamma air dose was O.OOE+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/cm and an occupancy factor of 1.0 is used. The skin dose from beta and gamma radiation for the year was O.OOE+00 mrem based on measured efflents and average meteorlogical data (Table 3.1-1), and 3.49E-06 mrem based on measured efflents and concurrent meteorlogical data (Table 3.4-1).

The maximum offsite beta air dose for the year was O.OOE+00 mrad based on measured effluents and average meteorlogical data (Table 3.1-1), and O.OOE+00 mrad based on measured effluents and concurrent meteorlogical 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 I-131 has decayed away, the maximum offsite concentration is estimated to be zero, as expected.

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

3.2 Liquid Effluent Pathways The three principal pathways through the aquatic environment for potential doses to man from liquid waste are ingestion of potable water, eating aquatic foods, and exposure while on the shoreline. Not all of these pathways are significant or applicable at a given time but a reasonable approximation of the dose can be made by adjusting the dose formula for season of the year or type and degree of use of the aquatic environment. NRC developed equations* were used to calculate the doses to the whole body, lower 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 1.90E-02 mrem (adult) and no organ dose exceeded 3.OOE-02 (teenage liver) mrem (Table 3.2-1).

3.3 Assessment of Dose to Member of Public During the period January to December, 2003, 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):

• 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-133, 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).

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

4.0 SITE METEOROLOGY A summary of the site meteorological measurements taken during each calendar quarter of the year is given in Appendix H. The data are presented as cumulative joint frequency

• Nuclear Regulatory Commission, Regulatory Guide 1.109 (Rev. 1) 5

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 99.4% during 2004 (Table 3.4-1).

5.0 ENVIRONMENTAL MONITORING Table 5.0-1 provides an outline of the Radiological Environmental Monitoring Program (REMP) as required in current Technical Specifications. Tables 5.0-1 and 5.0-2 provide program sampling locations, sample collection frequencies and analyses for all samples.

Figures 5.0-1 and 5.0-2 show current sampling locations. Tables 5.0-3 to 5.0-6 summarize data for the year. A detailed listing of all data is presented in Appendix III.

Specific findings for various environmental media are discussed below.

5.1 Gamma Radiation External radiation dose was measured using CaF2 thermoluminescent dosimeters (TLDs). Each location normally consists of 2 TLD sets. The quarterly average external radiation dose for the year was 18.3 mR at the indicator locations. There are no control locations at Zion. TLD locations are shown in Figure 5.0-1.

Quarterly external radiation dose at indicator air sampling locations averaged 17.2 mR and was similar to the levels measured in 1985 (14.7 mR), 1986 (15.5 mR), 1987 (15.2 mR), 1988 (14.3 mR), 1989 (14.1 mR), 1990 (14.8 mR), and similar to those in 1991 (12.5 mR), 1992 (11.6 mR), 1993 (12.5 mR), 1994 (12.5 mR), 1995 (12.7mR), 1996 (13.1 mR), 1997 (12.6 mR), 1998 (14.3 mR), 1999 (13.7 mR), 2000 (13.6 mR), 2001 (17.4 mR), 2002 (16.5 mR) and 2003 (19.2 mR). These differences are not statistically significant.

5.2 Airborne I-13 1 and Particulate Radioactivity Locations of the air samplers are shown in Figure 5.0-1.

Gross beta concentrations ranged from 0.009 to 0.046 pCi/mi and averaged 0.021 pCi/mi and were similar to those in 1985 (0.02 pCi/m ), 1986 (0.023 pCi/Mi , except for the period from May 13 through June 10 when it was influenced by the nuclear reactor accident at Chernobyl), 1987 (0.020 pCi/m ), 1988 (0.025 pCi/m ), 1989 (0.022 pCi/m ), 1990 (0.018 pCi/m3), 1991 (0.018 pCi/m ), 1992 (0.019 pCi/m ), 1993 (0.020 pCi/mi) , 1994 (0.019 pCi/m ), 1995 (0.018 pCi/mi), 1996 (0.020 pCi/m3), 1997 (0.021 pCi/mi), 1998 (0.022 pCi/m 3 ), 1999 (0.024 pCi/m 3 ), 2000 (0.025 pCi/m 3 ) 2001 (0.027 pCi/m3), 2002 (0.025 pCi/m 3 ) and 2003 (0.024 pCi/m3 ).

No activity attributable to station operation was detected in any sample.

6

5.3 Aquatic Radioactivity Water samples were collected weekly from four public water works that draw water from Lake Michigan. Monthly composites of the samples were analyzed for gross beta and gamma emitters and quarterly composites for tritium. Gross beta, gamma emitters and tritium were in all cases below the lower limits of detection for the program. Similar results were obtained in 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002 and 2003.

Fish samples were collected from the vicinity of the station, and the edible portions analyzed for gamma emitters. Concentrations of radioactivity in these samples were below the lower limits of detection for the program. Similar results were obtained in 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002 and 2003.

Sediment samples were collected near site of Illinois Beach State Park and analyzed for gamma emitters. Gamma radioactivity was below the limit of detection.

Fish, water and sediment locations are shown in Figure 5.0-2.

5.4 Sample Collections All samples were collected as scheduled except those listed in the Listing of Missed Samples, Appendix III.

5.5 Program Modifications There were no changes to the program in 2004.

6.0 ANALYTICAL PROCEDURES Procedures used during the period covered in this report remained unchanged. A summary of the procedures used for analyzing radioactivity in environmental samples is given in Appendix VII of the report for the period January - December 1993.

7.0 NEAREST RESIDENCE CENSUS A census of the nearest residences within a 6.2-mile radius was conducted by J. Rieter on August 30, 2004.

Results of the nearest residence census are presented page 26 of Appendix III.

8.0 INTERLABORATORY COMPARISON PROGRAM RESULTS Environmental Incorporated's Interlaboratory Comparison Program Results are presented in Appendix IV.

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9.0 ERRATA DATA There is no errata data for 2004.

8

ZION APPENDIX I DATA TABLES AND FIGURES I-I

Zion Station 2004 Stack-Effluent Totals Total Mkico Curies

. Feb Mar 1StOQt May Jun 2nd Ad Au_ Sep 3rd lOct Nov Dec 4th Total Alpha < LLD <LLD <LL 4LLLD <cL <LL LD < L D < LLD <LL < L L < LD LLD <LLLD cLLD Beta <L LLD L cL L<LLD cLLD c cLLD U D < LLD LILD <LLD LL S:

H-3 <cLLD -cLLD cLLD cL <cLLD -c <LW <LWL LL <LD <LLD <LLD <LLD LLLD < LLD 0 r"

O."

Partic T, Mn-54 <c <LUDfLLD L-LL <LLD <U LLD <LLD LLD <LL LLLDLLD L <LLD cLLD cLLD cU D OL CO-58 <LLD L LLD <U LLD L < LLD <LLD cLLD <LLD cL LD Lc LLD LLD LLD < LLD <LL <LcLUD Co.60 <LWD cLLD <cLLD <L LD 61E64E- <LLD &87E-0 cLLD <L <LL LD <LU D cLLLD <LLD 8.7EM-1 Zn;5 Lc OL LW <LWD <LLD c un <LLD cLLD <LLLD cLLD <Li cLLD <LLDf <L WD <LWD < LLD < LLD Sr-89 LLUD < LLD <LL -,LLD_~ c UcDLLD ,L~ U < LLD < LD, < LLD

• cLLD c LLD cLLD LLcLLD cLL LLD c Sr-9 cLLD cLLD cLLD <LLD <LLD < LLD < LWD <LLD cLLD <LLD <LLW <LLD <LLD - LLD <LLDW LLD cLLD

s-134 <LW < LLD <LW <LL <LW <LL <LW LL LW L <LWLD <LLD cLLD LLLD < LLD cLLD <LLDW o-137 <LLD <LLD <LLD <LLD cLLD < U L WD < LLD <LLD LcULD <LLD <LD LLD <LLD <LLD <LLD <LLD

e-141 cLLD cLLD <LLD xLLD cLLD < ULO LLD c LLD <cLLD c UD= MM LDcLD < LLD < LLD < LLD < LLD LLUD L- cLLD <LLD <LLD_- LU LLD <LLD -_ <LLD <LLD -

cLLD <LWD a <LLD a <LLD a -_

c<LLD < LD C.144 cLWD <LLD <LLD Kr-85 UD cLLD c UD <LL c <LLD <LD < cLD < LLD <LLD cLLD <LLW <LLD < LLD <LLD <LLD <LLD Kr-8mk Ic U LLD LLD c cLLD <cLLD c ULD cULD U O LLD< LL jc<LLD D LLD cLLD cLLD <cLLD <cLLD cLLD Kr-87 l< LLD cLLD <UL cLLD cLLD cULD cULD LLUD <:LLD <cLLD cLLD cLLD cLLD <ULO <cLLD <SLLD cULD Kr-8 cLUD cLL cUcLLD l<LLD cLLD l<LLD cLLD LLUD LLD <LLD <cLLD LL LL D LL < I. LLUD < LLD cLLD Xe-133 c LLD LLD c cLLD < LLD < U <cLLD LLD LLD : cLLD c LLD c U cLLD < UD <LL ceLLD cLLD e1 D cLWD _ <LD <LLD LLD cLLD < LLW WD LLD < LLD <LLD <LLD LLD <LLD <LLW <LLD <LLD <LLD Xe-13 cLLD cLLD < LD <LLD <LLD <cLD <LLD <LLD LLD <LLD <LLD LcWD c<

LD <LWD <LLD < LLD <ULD X-138 <LLD <LLD <LLD <LLD <LLD cLLD <LLD <LLD <LLD <LLDW <LLD <LLD cLLD cLLD <LLD <LLD l<LD

2004 AER Water Worksheet Total microCuries Jan Feb Mar s Otr Apr May Jun dQ 0 Jul Aug S ld Ot ct Nov _

C <iLLD u c LLD D I <LL LL ICICIC.03E+00 cLL <LL1 cLID cLLt 1.36E-01 5IC 6.03

_Beta _ L Icu cLLD cLLDLLLD Ic Ilc11 LLD LLD IL<I IcLLf I<c LLt~c LULDt c LLtl L)<

<LLt LLDLI 3c3 UD7+ LLD

)<LD H-3 731 E+03 It731E+03 < < LLD <LLD < LI <LLD <LL <LL <IL ID 7.60+232E0 .4+440E0 Pah. =_ D _

MnL54 c LID <LD_ LLc LLD Ic LLI < D- LLIc LLD <LID cLLI D< LD < LLD ICLLD Fe-O5 .Lu CLLD _DI Fs-6b cLIDLL IC IC_LLD <LL < <LI ~~~~~~~~~~LLD

- LI< _ ICLL L Il D < LU LU< LLD cc LU c cLIcLlcL L UcLIcLS<L UcL L LLD CO-58 ICLW <LIDICIC IC IC IC ICD ICT[ IC ICU. <IC L LD P-i Co-6D cL 423E+02 _ 423E+02 c LLIDc CLcLLD c LLI c LUc t IcLL1 <LUD LUt.65E+01 159E403 17E3 2-09E*03 to O* Zn-65 <I Ll < LLD c LLDtIc < LD

<Ic cLLc LLD c LLI

<L cLLLLtICD L cLLD < LLDc-0 (O I

w Mo-99 i < LLD cL<l C LLD Cut <L ILt < LLDUC ICLLt LLID L ID <LID < LLD -fL IcLLD r" aa4l 20EO I L.<I I LD<I < LI Lb15 <LD I.9EO 1.01E+02 193+212E0 W a

Sb-125 _ 2.06Ed01 _ 2E06iE+OO . < <IC <L~l cDI< < <L < <LID 2.73E400 2.73 6.58 CcLL3 85E+OO u 3.8-5E+00 c LLUc I cLULDtc Lc < Ic Cs-137 cLl 5.71 EtO2_ 5.71E-02t) c Ic cILU cL U CLU <cLI 5.:30Ei01 2.13E+03 2.18E03 2.75E+03 Ce 141_ c LLD _ml c LLD c IcLL<tu.c < LLt < c LU < L LU IcU I LLD L ICL <L WD Ce-144 <1I <CLL)- LL <C LD c cIL I Ic LU < < LL LLI I LLD LLD <LLD <LLD Sr-90 _c _ LLID LLD CLLDE+O c' <LIUD cIC - <IL

_ - 3.29E-01

- 1.42Ec01

-_ -1.45EcLLL 18

- =

Kr _ cLLD <LLc LD c U c Lt c LI c Uc I cLCcLIcL L L L Ar 8{ < LL D <LC LLt)D LJD < LLC1 <; c LLt c LU Ic LLt -c LL[ c LUc LL IUc: UD I I c LLD IrB -c LLD _ c LLD Ic LU ,cULI< < LLDI c LU Ic LLDIC c tc Ulc LUD Ic LLiD IU ICLD < LLD

-C- c -c-LLD LL-C IC LL c LL- - I Kr-81 Kr uu I cLLD LLD

<c LLD _ml

_ c LLD

-c <C

<C LU ctLLt c LL LIc c LLt Ic LUt

-c <c L LLIC- IcL <

< LLD LLD LLD IC Ic LLCI 13-cl - < LLt LLD _ c LID<LL ICLD<LLDIL LLD1 ICLLD <LLD ID LLD- - -

KrS I! LD<.<L<I<I L L I i L) LID DI II LLD Xe-135 <Ll < LLD Lau c LLD <c < LLt cLUtc LLD < LLI I <C1 LU c LU) IC <LD <ILID jXe-1353jLLc ID L LD u L <I.

IcLD I L<Ic L2< LD <L< LID LLD <I <IDCID <LD <I (r835 ILLD cD U LID <CcI <LDIC <LL < LLIC I <cLLD < LLD < LLD IcLLD

ZION Table 2.0-1 has been deliberately deleted. For details on solid waste disposal, see the Zion 2004 Effluent Report.

1-4

Table 3.1-1 RETDAS v3.6.3 <ZIO> VSSI 40CFR19D URANIUM FUEL CYCLE DOSE REPORT GASEOUS DOSE

SUMMARY

Report for: 2004 Unit Range - From: I To: 2

==- I&P DOSE LIMIT ANALYSIS ==l ANNUAL 2004

====~

Age Dose Limit Max % of Annual - Limit Group Organ (mrem) (mrem) Limit 2004 - Admin. Any Organ ADULT GILLI 4.73E-05 1.13E+01 4.21E-04 2004 - Admin. Total Body CHILD TBODY 4.17E-05 1.05E+01 3.97E-04 2004 - T.Spc. Any Organ ADULT GILLI 4.73E-05 1.50E+01 3.16E-04 Receptor: 5 Composite Crit. Receptor - IP Distance: 0.00 (meters) Compass Point: NA Critical Pathway: Ground Plane Deposition (GPD)

Major Contributors ( 0% or greater to total)

Nuclide Percentage CO-60 1.00E+02 2004 - T.Spc. Total Body CHILD TBODY 4.17E-05 1.50E+01 2.78E-04 Receptor: 5 Composite Crit. Receptor - IP Distance: 0.00 (meters) Compass Point: NA Critical Pathway: Ground Plane Deposition (GPD)

Major Contributors ( 0% or greater to total)

Nuclide Percentage CO-60 1.00E+02 1-5

Table 3.1-1 (continued)

RETDAS v3.6.3 <ZIO,> VSSI 40CFRl90 URANIUM FUEL CYCT.E DOSE REPORT GASEOUS DOSE

SUMMARY

Report for: 2004 Unit Range - From: 1 To: 2

== NG DOSE LIMIT ANALYSIS ANNUAL 2004 ~==== >=~

Dose Limit Max % of Annual - Limit (mrad) (mrad) Limit 2004 - Admin. Gamma O.00E+00 1.50E+01 0.00E+00 2004 - Admin. Beta 0.00E+00 1.50E+01 0.00E+00 2004 - T.Spc. Gamma 0.001I+00 1.50E+01 0.00E+00 Receptor:: 5 Composite Crit. Receptor - IP Distance: 0.00 (meters) Compass Point: NA Nuclide Percentage 2004 - T.Spc. Beta 0.00E+00 1.50E+01 0.00E+00 Receptor: S Composite Crit. Receptor - IP Distance: 0.00 (meters) Compass Point: NA Nuclide Percentage 1-6

Table 3.2-1 RETDAS v3.6.3 cZIO> VSSI 40CFRl90 URANIUM FUEl, CYCLE DOSE REPORT LIQUID DOSE

SUMMARY

__.________________Z Report for: 2004 Unit Ranqe - From: 1 To: 2 Liquid Receptor

PERIOD DOSE BY ORGAN AND AGE GROUP (mrem) =- ANNUAL 2004 ======

Agegrp Bone Liver Thyroid Kidney Lung GI-LLI Skin TB ADULT 2.13F-02 2.88E-02 2.18X-07 9.78E-03 3.25E-03 7.69E-04 0.00E+00 1.89E-02 TEEN 2.27E-02 3.00E-02 1.60E-07 1.02E-02 3.97E-03 5.74E-04 0.00E+00 1.05E-02 CHILD 2.86E-02 2.72E-02 2.19E-07 8.86E-03 3.19E-03 2.23E-04 0.00E+00 4.05E-03 INFANT 4.07E-05 3.58E-05 1.50E-07 9.60E-06 3.98E-06 1.47E-06 0.OOE+00 3.98E-06

SITE DOSE LIMIT ANALYSIS ==== ANNUAL 2004 == =

Age Dose Limit Max % of Annual - Limit Group Organ (mram) (mrem) Limit 2004 - Admin. Any Organ TEEN LIVER 3.00E-02 7.50E400 4.00E-01 2004 - Admin. Total Body ADULT TBODY 1.89E-02 2.25E+00 8.41E-01 2004 - T.Spc. Any Organ TEEN LIVER 3.00E-02 1.00E+01 3.00E-01 Critical Pathway: Fresh Water Fish - Sport (FFSP)

Major Contributors ( 0% or greater to total)

Nuclide Percentage H-3 5.33E-04 CO-60 3.64E-02 CS-134 3.15E-01 CS-137 9.96E+01 2004 - T.Spc. Total Body ADULT TBODY 1.89E-02 3.00E+00 6.31E-01 Critical Pathway: Fresh Water Fish - Sport (FFSP)

Major Contributors ( 0% or greater to total)

Nuclide Percentage H-3 1.15E-03 CO-60 1.27E-01 SR-90 2.47E-02 CS-134 4.03E-01 CS-137 9.94E+01

'-7

Table 3.3-1 ZION STATION 10CFR20 Compliance Assessment

1. 10CFR 20.1301 (a) (1) Compliance Total Effective Dose Equivalent, mremlyear 4.89E-2 10 CFR 20.1301 (a) (1) limit mrem/yr 100

% of the limit 0.0489

2. Compliance Summary IOCFR20 ISt Qtr. 2nd Qtr. 3d Qtr. 4th Qtr  % of Limit TEDE 1.02e-2 8.9E-5 0.0 3.88e-2 0.0489%

In mRem I-8

Table 3.4-1 Zion Station - Unit 1 MAXIMUM DOSES RESULTING FROM AIRBORNE RELEASES 2004 TYPE OF DOSE FIRST QUARTER SECOND WUARTER THIRD OUARTER FOURTH QUARTER ANNUAL GAMMA AIR (mrad) 0.OOOE+00c N ) 0.000E+OO( N ) O.OOOE+OOt N) 0.OOOE+00( N ) O.OOOE+OO( N )

BETA AIR (mrad) O.OOOE+O( N ) O.OOOE+00( N ) D.OO0E+00( N ) 0.000E+0O( N) O.OOOE+OD( N )

WHOLE BODY (mrem) 0.OOOE+OW( N ) 1.490E-06( W ) O.OOOE+O0( N ) 0.OOOE+OO( N ) 1.490E-06( W )

SKIN (mrem) O.000E+O0( N ) 1.750E-06( W ) 0.000E+OO( N) 0.000E+00( N ) 1.750E.06( W )

ORGAN (mrem) 0.000E+OO( N ) 1.700E 06(ENE) 0.00OE+t0( N) 0.000E+OO( N) 1.700E-06(ENE)

CRITICAL PERSON Adult Teenager Adult Adult Teenager CRITICAL ORGAN Bone Lung Bone Bone Lung COMPLIANCE STATUS 10 CFR 50 APP. I 10 CFR 50 APP.I TYPE OF DOSE WUARTERLY OBJECTIVE S OF APP. I YEARLY OBJECTIVE I OF APP. I GAMNA AIR (mrad) 5.0 0.00 10.0 0.00 BETA AIR (mrad) 10.0 0.00 20.0 0.00 ViOLE BODY (mrem) 2.5 0.00 5.0 0.00 SKIN (mrem) 7.5 0.00 15.0 0.00 ORGAN (mrem) 7.5 0.00 15.0 0.00 CRITICAL PERSON Teenager Teenager CRITICAL ORGAN Lung Lung Calculation used release data from the following:

Unit 1 - Ground Date of calculation: 3/30/2005 I-9

Table 3.4-1 (continued)

Zion Station - Unit 2 MAXIMUM DOSES RESULTING FROM AIRBORNE RELEASES 2004 TYPE OF DOSE FIRST QUARTER SECOND QUARTER THIRD QUARTER FOURTH CUARTER ANNUAL GAMMA AIR (mrad) O.OOOE+00( N ) O.OOOE+00( N ) O.OOOE+00( N ) O.OOOE+00( N ) 0.OOOE+00( N )

BETA AIR (mrad) 0.OOOE+0O( N ) 0.QOOE+00( N ) 0.OOOE+00( N ) O.OOOE+OOt N ) O.000E+OO( N )

WHOLE BOOY (mrem) D.DOOE+00( N ) 1.480E-06( W ) O.0OOE+O0C N ) O.OOOE+00( N ) 1.480E-06( W)

SKIN (mrem) O.OOOE+00( N ) 1.740E-06( W ) O.000E+00( N ) 0.OOOE+00( N ) 1.740E-06( W )

ORGAN (mrem) 0.OOOE+00( N ) 1.690E-06(ENE) O.COOE+00( N ) O.000E+0O( N ) 1.690E-06(ENE)

CRITICAL PERSON Adult Teenager Adult Adult Teenager CRITICAL ORGAN Bone Lung Bone Bone Lung COMPLIANCE STATUS 10 CFR 50 APP, I 10 CFR 5O APP.I TYPE OF DOSE QUARTERLY OBJECTIVE S OF APP. I YEARLY OBJECTIVE l OF APP. I GAMHA AIR (mrad) 5.0 0.00 10.0 0.00 BETA AIR (mrad) 10.0 0.00 20.0 0.00 iHOLE BODY (mrem) 2.5 0.00 5.0 0.00 SKIN (mrem) 7.5 0.00 15.0 0.00 ORGAN (mrem) 7.5 0.00 15.0 0.00 CRITICAL PERSON Teenager Teenager CRITICAL ORGAN Lung Lung Calculation used release data from the following: Data Recovery 99.4%

Unit 2 - Ground (priority parameters)

Date of calculation: 3/30/2005 I-10

ZION Figure 5.0-1

• TLD Monitoring Location Zion Station Inner Ring TLD Locations and l Fixed Air Samplers A Air Sampting Location 01 Onsitc No. I Southside

.02 Onsite No. 2 Westside 03 Onsite No. 3 Northside I-li

ZION Figure 5.0-2 ish, Water and Sediment Locations I Z-14 Kenosha Water Works Z-1 5 Lake County Water Works Z-1 6 Waukegan Water Works Z-1 8 Lake Forest Water Works Z-25 Illinois Beach State Park Z-26 Lake Michigan at Discharge Z-27 Lake Michigan I 0 mi. North (C) 1-12

TABLE 5.0-1 Zion Station Radiological Environmental Monitoring Locations

<:H v Z-01 Onsite No. 1 Southside Z-02 Onsite No. 2 Westside Z-03 Onsite No. 3 Northside V V Z-14 Kenosha Water Works . .

Z-15 Lake County Water Works . . .

Z- 16 Waukegan Water Works . . .

Z-18 Lake Forest Water Works . . .

Z-26 Lake Michigan Nearsite at Station . . v Z-25 Lake Michigan, Illinois Beach State Park . . .

Z-27 Lake Michigan Farsite . .

CENSUS Dairy Residence Livestock 1-13

TABLE 5.0-2 ZION STATION RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM, SAMPLING LOCATIONS

1. AIR SAMPLERS Distance Direction Sector Site Code Location (miles)

Z-01 Onsite No. 1 Southside 0.3 S J Z-02 Onsite No. 2 Westside 0.2 W N Z-03 Onsite No. 3 Northside 0.2 NNW R Distance Direction Sector a

Site Code Location (miles)

2. TLDs

a. Z-01 Onsite No. 1 Southside 0.3 S J Z-02 Onsite No. 2 Westside 0.2 W N Z-03 Onsite No. 3 Northside 0.2 NNW R

b. Special TLD Locations Distance Direction Sector Site Code (miles)

Inner Ring Z-101-1,2 0.2 N A Z-102-1,2 0.2 NNE B Z-103-1,2d 0.2 NE C Z-104-1,2 0.1 ENE D Z-105-1,2 0.1 E E Z- 106-1,2d 0.1 ESE F Z-107-1,2 0.1 SE G Z-108-1,2d 0.1 SSE H Z-l 10-1,2 0.2 SSW K Z- 111-1,2 0.3 SW L Z-l 12-1,2 0.7 WSW M Z-1 13-1,2 0.6 W N Z-1 14-1,2 0.6 WNW P Z-l 15-1,2 0.4 NW Q Q

3. PUBLIC WATER SUPPLY Distance Direction Sector a

Site Code Location (miles)

Z-14 (C) Kenosha Water Works 10.0 N A Z-15 Lake County Water Works 1.4 NNW R Z-16 Waukegan Water Works 6.1 S J Z-18 (C) Lake Forest Water Works 12.9 Si a

Control (background) locations are denoted by a "C" after site code. All other locations are indicators.

I-14

TABLE 5.0-2 (continued)

ZION STATION RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM, SAMPLING LOCATIONS

4. FISH Distance Direction Sector Site Code' Location (miles)

Z-26 Lake Michigan Nearsite At Station Z-27(C) Lake Michigan Farsite 10.0 mi. N A

5. SHORELINE SEDIMENTS Distance Direction Sector Site Code Location (miles)

Z-25 Lake Michigan, Illinois Beach 0.2 S J State Park Control (background) locations are denoted by a "C" after site code. All other locations are indicators.

1-15

TABLE 5.0-2 (continued)

ZION STATION RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM, SAMPLE COLLECTION AND ANALYSES Location Collection Type of Frequency Sample Media Code' Site Frequency Analysis of Analysis 1.Airborne Onsite. Nearfield and Control Filter exchange Gross Beta Weeklv Particulates weekly Gamma Isot. Quarterly Composite Z-01 Onsite No. I South side (or ifwecktygross beta ina Z-02 Onsite No. 2 WVest side sarnpleexceeds SX the Z03 Onsite No. 3 North side averageconcentration of preceding calendar quarter).

2. Air Sampling Z-01 Onsite No. I South side - Test and Weekly Train Z-02 Onsite No. 2 West side Maintenance Z-03 Onsite No. 3 North side

3. TLDs a. Z-01 Onsite No. I South side Gamma Quarterly Z-02 Onsite No. 2 West side Z-03 Onsite No. 3 North side (two TLDs per location)

b. Z-101-1,2 Inner Ring 102-1,2 103-1,2 104-1,2 105-1,2 106-1,2 107-1,2 108-1,2 110-1,2 111-1,2 112-1,2 113-1,2 114-1,2 115-1,2

4. Public Water Z-14 (C) Kenosha Water Weekly Gross Beta Monthly composite.

Works Gamma Isot. Monthly composite.

Z-15 Lake County Tritium Quarterly composite.

Water Works Z-16 Waukegan Water Works Z-I 8 (C) Lake Forest Water Works

5. Fish (at least Z-26 Lake Michigan Two times/year Gamma Isot. Two times/year on two species) Nearsite edible portions only.

Z-27 Lake Michigan Farsite

6. Sediments Z-25 Lake Michigan Semiannually Gamma Isot. Semiannually Illinois Beach State Park

7. Land Use Census Nearest In all sectors up to 6.2 miles. Annually during grazing Residence season.

aControl (background) locations are denoted by a "C" in this column. All other location are indicators.

1-16

Table 5.0-3 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM QUARTERLY

SUMMARY

Name of Facility Zion Generatine Station Docket No. 50-295. 50-304 Location of Facility Lake. Illinois Reporting Period 1stOuarter 2004 (County, State)

Sample Type and Indicator Location with Highest Control Number of Type Number of Locations Highest Meana Locations Non-routine (Units) Analyses LLD Meana Quarterly Mean Range Meana Results Range Range Air Gross 39 0.01 0.026 (39/39) Z-03, Zion Onsite No. 0.028 (13/13) None 0 Particulates Beta (0.013-0.046) 3 Northside, (0.016-0.045)

(pCi/m3) 0.25 mi. NNW, Sector 3 R Gamma Spec. None 0.01 <LLD 0 Cs-134 None 0.01 <LLD 0 Cs-137 None 0.01-0.04 <LLD 0 Other Gammas Public Water Gross Beta 12 4 <LLD - - <LLD 0 (pCi/L)

Gamma Spec. 12 Cs-134 10 <LLD - - <LLD 0 Cs-137 18 <LLD - - <LLD 0 Other ODCM-Required 15-30 <LLD - <LLD 0 Gammas Tritium 4 200 <LLD - - <LLD 0 Gamma Gamma Dose 34 9.7 15.8 (34/34) Z-01lb, 0.2 mi. S, 18.0 (1/1) None 0 Background (14.0-18.0) Sector J (TLDs)

(mR/Qtr.)

a Mean and range based on detectable measurements only. Fractions indicated in parentheses.

b Locations Z-01-1, 101-2,105-1 and 115-1 had identical results of 18.0 mR. OnlyZ-01-1 is detailed in this summary.

1-17

Table 5.0-4 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM QUARTERLY

SUMMARY

Name of Faciliy Zion Generatinz Station DocketNo. 50-295. 50-304 Location ofFacility Lake. Illinois ReportingPeriod 2nd Ouarter 2004 (County, State)

Sample Type and Indicator Location with Highest Highest Control Number of Type Number of Locations Quarterly Mean _ Meana Locations Non-routine (Units) Analyses LLD Meana I Range Meana Results Range Range Air Gross 39 0.01 0.016 (34139) Z OlbOnsiteNo. I, 0.017(12/13) None 0 Particulates Beta (0.010-0.029) Southside (0.010-0.026)

(pCi/rm3 ) 0.2 mi S. Sector J Gamma Spec. 3 Cs-134 0.01 <LLD <LLD 0 Cs-137 0.01 <LLD <LLD 0 Other Gammas 0.01-0.04 <LLD <LLD 0 Fish Gamma Spec. 3 (pCi/g wet)

Cs-134 0.10 <LLD - <LLD 0 Cs-I 37 0.10 <LLD -- <LLD 0 Other ODCM-Required 0.13-0.26 <LLD - <LLD 0 Gammas Other Gammas 0.20-0.30 <LLD -- LLD 0 Bottom Gamma Spec. I Sediments (pCi/g dry) Cs-134 0.15 <LLD - - None 0 Cs-137 0.18 <LLD - - None 0 Other Gammas 0.10-0.60 <LLD - - None 0 Public Water Gross Beta 12 4 <LLD - - <LLD 0 (pCi/L)

Gamma Spec. 12 Cs-134 15 <LLD - <LLD 0 Cs-137 18 <LLD - <LLD 0 Other ODCM-Required 15-30 <LLD - <LLD 0 Gammas Tritium 4 200 <LLD - - <LLD 0 Gamma Gamma Dose 34 9.7 19.9 (34/34) Z-1 12-1 23.0 (1/1) None 0 Background (18.0-23.0) 0.7 mi. WSW, Sector M (TLDs)

(mR/Qtr.)

a Mean and range based on detectable measurements only. Fractions indicated in parentheses.

b Locations Z-01 and Z-03 had identical means of 0.017 pCi/M3. Only Z-01 is detailed in this summary.

I-is

Table 5.0-5 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM QUARTERLY

SUMMARY

Name of Facility Zion Generating Station DocketNo. 50-295. 50-304 Location of Facility Lake. Illinois Reporting Period 3rd Ouarter 2004 (County, State)

Sample Type and Indicator Location vith Highest Highest Control Number of Type Number of Locations Quarterly Mean _ l Meana Locations Non-routine (Units) Analyses LLD Meana Range Meana Results Range Range Air Gross 39 0.01 0.020 (38/39) Z-01 Onsite No. 1 0.022 (13/13) None 0 Particulates Beta (0.010-0.032) Southside (0.014-0.032)

(pCi/m 3 ) Gamma Spec. 3 0.2 mi. S, Sector J Cs-134 0.01 <LLD - None 0 Cs-137 0.01 <LLD - None 0 Other Gammas 0.01-0.04 <LLD - None 0 Public Water Gross Beta 12 4 <LLD - <LLD 0 (pCiKL)

Gamma Spec. 12 Cs-134 10 <LLD - <LLD 0 Cs-137 18 <LLD - - <LLD 0 Other ODCM-Required 15-30 <LLD - - <LLD 0 Gammas Tritium 4 200 <LLD - - <LLD 0 Gamma Gamma Dose 34 9.7 15.1 (34/34) Z-1 12-1, 18.0 (1/1) None 0 Background (13.0-18.0) 0.7 mi. WSV, Sector (TLDs) M (mR/Qtr.)

a Mean and range based on detectable measurements only. Fractions indicated in parentheses.

b Locations Z-112-1 and Z-115-1 had identical results of 18.0 mR. Only Z-112-1 is detailed in this summary.

1-19

Table 5.0-6 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM QUARTERLY.

SUMMARY

Name of Facility Zion Generating Station Docket No. 50-295. 50-304 Location of Facility Lake. Illinois Reporting Period 4th Quarter 2004 (County, State)

Sample Type and Indicator Location with Highest Control Number of Type Number of Locations Highest Meana Locations Non-routine (Units) Analyses LLD Meana Quafterly Mean . Range Meana Results Range Range Air Particulates Gross Beta 39 0.01 0.024(39/39) Z-01,ZionOnsiteNo. I 0.025 (13/13) None 0 (pCi/m 3 ) (0.011-0.040) Southside (0.015-0.035)

Gamma Spec. 0.2 mi. S, Sector J 3

Cs-134 0.01 <LLD -None 0 Cs-137 0.01 <LLD None 0 Other Gammas 0.01-0.04 <LLD None 0 Fish Gamma Spec. 3 (pCi/g wet)

Cs-134 0.10 <LLD - <LLD 0 Cs-137 0.10 <LLD - <LLD 0 Other ODCM-Required 0.13-0.26 <LLD . <LLD 0 Gammas Other Gammas 0.20-0.30 <LLD - <LLD 0 Bottom Gamma Spec I Sediments Cs-134 0.15 <LLD None 0 Cs-137 0.18 <LLD - None 0 Other Gammas 0.10-0.60 <LLD - None 0 Public Water Gross Beta 12 4 <LLD - - <LLD 0 (pCi/L)

Gamma Spec. 12 Cs-134 15 <LLD - <LLD 0 Cs-137 18 <LLD - <LLD 0 Other ODCM-Required 15-30 <LLD - <LLD 0 Gammas Tritium 4 200 <LLD - <LLD 0 Gamma Gamma Dose 34 9.7 22.5 (34/34) Z-102-lb 26.0 (1/1) None 0 Background (20.0-26.0) 0.2 mi. NNE, Sector B (TLDs)

(mR/Qtr.)

a Mean and range based on detectable measurements only. Fractions indicated in parentheses.

b Locations Z-102-1, Z-112-l,Z-115-1 and 115-2 had identical means of 26 mR. Only Z-102-1 is detailed in this summary.

I-20

ZION APPENDIX II METEOROLOGICAL DATA H-1

Zion Nuclear Station Period of Record: January - March 2004 Stability Class - Extremely Unstable - 25OFt-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 0 7 2 2 0 11 NNE 0 5 7 0 0 12 NE 5 3 0 0 0 8 ENE 1 0 0 0 0 1 E 2 0 0 0 0 2 ESE 0 0 0 0 0 0 SE 0 0 0 0 0 0 SSE 0 0 0 0 0 0 S 1 0 1 0 0 2 SSW 0 1 3 0 0 4 SW 0 3 1 0 0 4 WSW 1 5 0 0 0 6 W 2 5 5 0 0 12 WNW 1 5 2 1 0 9 NW 0 3 1 0 0 4 NNW 0 4 2 0 0 6 Variable 0 0 0 0 0 0 Total 0 13 41 24 3 0 81 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 II-2

Zion Nuclear Station Period of Record: January - March 2004 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 1 *1 3 0 0 5 NNE 0 3 1 0 0 4 NE 3 2 0 0 0 5 ENE 2 3 0 0 0 5 E 0 0 0 0 0 0 ESE 1 o o 0 0 1 SE 0 0 0 0 0 0 SSE 0 0 1 0 0 1 S 0 0 0 0 0 0 SSW 0 1 1 0 0 2 SW 1 3 0 0 0 4 WSW 1 1 3 0 0 5 W 1 5 2 2 0 10 WNW 4 5 3 0 0 12 NW 0 4 1 0 0 5 NNW 0 1 1 0 0 2 Variable 0 0 0 0 0 0 Total 0 14 29 16 2 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 II-3

Zion Nuclear Station Period of Record: January - March 2004 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 0 2 9 0

NNE 1 1 4 0

NE 3 3 6 0

ENE 3 2 5 0

E 0 0 0 0

ESE 1 1 2 0

SE 0 0 0 0

SSE 0 3 7 0

S 1 0 2 0

SSW 0 5 7 0

SW 0 2 8 0

WSW 1 5 11 0

W 3 9 21 0

WNW 1 4 8 0

NW 3 7 10 NNW 1 0 0 1 Variable 0 0 0 0 Total 1 17 44 32 7 0 101 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 II-4

Zion Nuclear Station Period of Record: January - March 2004 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 16___

N 0 14 36 16 13 0 79 NNE 2 14 17 6 0 0 39 NE 2 6 14 15 2 0 39 ENE 2 11 14 19 14 2 62 E 1 9 7 25 11 0 53 ESE 0 6 11 7 1 0 25 SE 2 10 21 9 0 0 42 SSE 0 14 42 25 2 0 83 S 1 11 8 5 0 0 25 SSW 2 4 36 17 0 0 59 SW 3 16 31 24 1 0 75 WSW 1 13 35 14 6 1 70 W 1 30 43 19 8 0 101 WNW 1 28 61 22 4 0 116 NW 0 20 66 11 1 0 98 NNW 1 17 26 15 0 0 59 Variable 0 0 0 0 0 0 0 Total 19 223 468 249 63 3 1025 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 II-5

Zion Nuclear Station Period of Record: January - March 2004 Stability Class - Slightly 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 6 6 4 0 0 16 NNE 3 10 2 0 0 15 NE 3 5 6 4 0 18 ENE 1 13 2 0 0 16 E 2 13 2 0 0 17 ESE 2 6 0 0 0 8 SE 0 6 5 1 0 12 SSE 1 9 21 11 0 45 S 3 17 19 4 0 43 SSW 4 23 16 4 0 48 SW 11 24 18 10 0 63 WSW 4 29 50 8 0 91 W 10 47 50 6 0 113 WNW 9 32 25 1 0 67 NW 4 37 10 0 0 51 NNW 8 13 6 0 0 27 Variable 0 0 0 0 o 0 Total 71 290 236 49 0 650 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 II-6

Zion Nuclear Station Period of Record: January - March 2004 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 1 1 0 0 2 NNE 3 2 0 0 5 NE 2 1 0 0 2 ENE 0 2 0 0 2 E 0 2 0 0 2 ESE 2 0 0 0 2 SE 3. 4 1 0 8 SSE 2 10 11 0 23 S 7 10 8 0 25 SSW 8 8 0 0 16 SW 11 4 2 0 17 WSW 7 4 0 0 11 W 6 9 0 0 15 WNW 4 7 0 0 11 NW 3 4 0 0 7 NNW 0 2 0 0 2 Variable 0 0 0 0 0 Total 58 70 22 0 150 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 II-7

Zion Nuclear Station Period of Record: January - March 2004 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 1 0 0 0 0 0 1 NNE 0 0 0 0 0 0 0 NE 0 0 0 0 0 0 0 ENE 0 0 0 0 0 0 0 E 0 0 0 0 0 0 0 ESE 0 0 0 0 0 0 0 SE 1 0 1 0 0 0 2 SSE 2 5 4 0 0 0 11 S 6 19 1 0 0 26 SSW 2 1 1 0 0 4 SW 1 4 0 0 0 5 WSW 0 6 0 0 0 6 W 0 3 0 0 0 3 WNW 1 6 0 0 0 7 NW 1 1 0 0 0 2 0 1 0 0 0 1 Variable 0 0 0 0 0 0 Total 15 46 7 0 0 68 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 II-8

Zion Nuclear Station Period of Record: January - March 2004 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 16 NNE 0 10 NE 3 5 ENE 1 1 E 2 2 ESE 0 0 SE 0 0 SSE 0 0 S 0 1 SSW 0 4 SW 0 4 WSW 0 8 W 0 12 WNW 0 9 NW 0 4 NNW 1 5 Variable 0 0 Total 0 7 11 42 15 6 81 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: 4 II-9

Zion Nuclear Station Period of Record: January - March 2004 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 4 5 NNE 0 2 1 3 NE 0 4 0 4 ENE 1 1 3 5 E 1 0 0 1 ESE 0 0 0 0 SE 0 0 0 1 SSE 0 0 0 0 S 0 0 0 0 SSW 0 0 1 2 SW 1 0 3 7 WSW 1 0 2 3 W I 1 3 10 WNW 2 1 5 11 NW o 2 3 S NNW 1 0 2 4 Variable 0 0 0 0 Total 0 8 11 27 13 2 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 clasE;es: 4 II-10

Zion Nuclear Station Period of Record: January - March 2004 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 0 1 5 11 NNE 0 0 1 2 3 NE 0 2 2 0 4 0

ENE 3 0 2 5 0

E 0 0 0 0 0

ESE 1 1 0 2 0

SE 0 0 1 2 0

SSE 0 0 2 5 0

S 0 1 0 2 0

SSW 0 3 3 8 0

SW 0 0 2 8 0

WSW 1 2 8 18 W 1 2 3 3 15 WNW 0 1 1 4 10 NW 0 1 3 3 7 NNW 0 0 0 1 1 Variable 0 0 0 0 0 Total 1 11 18 36 22 13 101 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: 4 II-11

Zion Nuclear Station Period of Record: January - March 2004 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 0 3 17 25 21 15 81 NNE 0 1 13 11 14 3 42 NE 1 7 4 14 4 5 35 ENE 0 9 9 14 20 16 68 E 1 8 3 4 9 19 44 ESE 0 4 7. 3 9 1 24 SE 0 1 18 37 24 0 80 SSE 1 4 15 20 7 0 47 S 0 6 6 4 8 1 25 SSW 0 3 6 35 18 4 66 SW 1 10 10 28 21 9 79 WSW 0 6 11 32 12 14 75 W 0 6 27 26 19 14 92 WNW 0 5 31 52 31 10 129 NW 0 2 19 55 16 7 99 NNW 0 1 16 15 10 2 44 Variable 0 0 0 0 0 0 0 Total 4 76 212 375 243 120 1030 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: 4 II-12

Zion Nuclear Station Period of Record: January - March 2004 Stability Class - Slightly 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 19-24 > 24 Total N 4 5 6 1 0 16 NNE 2 3 1 0 0 9 NE 3 3 4 2 1 15 ENE 1 6 2 2 3 14 E 8 12 8 0 0 28 ESE 1 3 3 0 0 10 SE 4 4 6 14 3 31 SSE 0 10 9 13 11 44 S 2 10 20 7 0 39 SSW 3 14 19 7 3 47 SW 2 15 22 21 2 63 WSW 3 14 52 24 4 100 W 4 24 51 16 4 100 WNW 11 16 24 14 0 66 NW 7 14 25 3 0 49 NNW 5 9 14 0 0 28 Variable 0 0 0 0 0 0 Total 16 60 162 266 124 31 659 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 4 II-13

Zion Nuclear Station Period of Record: January - March 2004 Stability Class - Moderately 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 19-24 > 24 Total N 0 2 2 1 0 0 5 NNE 0 0 0 0 0 0 0 NE 0 0 1 0 0 0 1 ENE 0 1 2 0 0 0 3 E 0 3 5 1 0 0 9 ESE 0 1 2 0 1 0 4 SE 0 3 2 1 2 0 8 SSE 0 5 10 4 4 4 27 S 2 4 7 5 3 0 21 SSW 0 2 14 5 2 0 23 SW 1 5 7 4 0 0 17 WSW 1 2 2 2 0 0 7 W 1 1 4 4 0 0 10 WNW 1 3 7 2 0 0 13 NW 0 2 2 3 0 0 7 NNW 0 0 3 1 0 0 4 Variable 0 0 0 0 0 0 0 Total 6 34 70 33 12 4 159 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 6 Hours of missing stability measurements in all stability classes: 4 II-14

Zion Nuclear Station Period of Record: January - March 2004 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 19-24 > 24 Total N 0 2 3 0 0 5 NNE 1 1 0 0 0 2 NE 2 2 0 0 0 4 ENE 0 0 1 0 0 1 E 0 0 0 0 0 0 ESE 0 0 0 0 0 0 SE 0 0 0 0 0 0 SSE 0 0 3 3 0 11 S 0 2 9 11 1 25 SSW 0 1 6 1 1 9 SW 0 0 1 5 0 7 WSW 0 0 2 0 0 2 W 0 0 2 0 0 2 WNW 0 1 0 0 0 1 NW 0 0 0 0 0 0 NNW 0 1 0 0 0 1 Variable 0 0 0 0 0 0 Total 3 10 27 20 8 2 70 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 4 II-is

Zion Nuclear Station Period of Record: April - June 2004 Stability Class - Extremely 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 0 0 6 7 13 NNE 0 8 43 42 93 NE 0 10 16 4 30 ENE 0 3 0 0 3 E 1 8 6 1 16 ESE 0 7 7 0 14 SE 0 3 10 0 13 SSE 0 3 4 0 7 S 0 0 0 0 0 SSW 0 0 0 6 12 SW 0 0 12 9 22 WSW 1 2 22 6 32 W 0 3 10 5 19 WNOW 0 2 5 1 8 NW 0 1 4 3 8 NNW 0 0 3 1 4 Variable 0 0 0 0 0 Total 2 50 148 85 9 0 294 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 II-16

Zion Nuclear Station Period of Record: April - June 2004 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 0 0 4 1 0 0 5 NNE 0 1 3 1 0 0 5 NE 1 7 2 0 0 0 10 ENE 0 3 1 0 0 0 4 E 0 1 0 0 0 0 1 ESE 0 3 1 0 0 0 4 SE 0 0 1 0 0 0 1 SSE 0 1 0 0 0 0 1 S 0 0 0 0 0 0 0 SSW 0 1 1 1 0 0 3 SW 0 1 2 2 0 0 5 WSW 0 0 3 1 0 0 4 W 0 3 2 2 0 0 7 WNW 0 2 2 1 0 0 5 NW 0 0 2 0 0 0 2 NNW 0 0 1 0 0 0 1 Variable 0 0 0 0 0 0 0 Total 1 23 25 9 0 0 58 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 II-17

Zion Nuclear Station Period of Record: April - June 2004 Stability Class - Slightly Unstable - 250Ft-33Ft Delta-T (F)

Winds Measured at 35 Feet Wind Speed (in mph)

Wind Direction 1-3 4-7 B-12 13-18 19-24 > 24 Total N 1 13 NNE 13 27 NE 6 8 ENE 5 7 E 2 3 ESE 7 12 SE 2 3 SSE 5 11 S 0 0 SSW 0 6 SW 0 8 WSW 1 11 W 1 7 WNW 0 4 NW 1 4 NNW 0 2 Variable 0 0 Total 4 44 46 28 4 0 126 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 II-18

Zion Nuclear Station Period of Record: April - June 2004 Stability Class - Neutral - 25OFt-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 23 51 58 2 0 134 NNE 45 31 15 0 0 96 NE 23 4 5 0 0 36 ENE 14 2 1 0 0 20 E 14 1 1 0 0 21 ESE 8 6 0 0 0 16 SE 14 4 0 0 0 18 SSE 10 30 2 0 o 43 S 5 5 2 0 0 12 SSW 6 9 5 6 1 29 SW 1 19 11 7 0 39 WSW 9 14 5 1 0 30 W 14 11 2 0 0 27 WNW 7 13 3 0 0 25 NW 8 12 1 1 0 22 NNW 8 10 3 4 0 25 Variable 0 0 0 0 0 0 Total 26 209 222 114 21 1 593 Hours of calm in this stability class: 0 1 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability class ;es: 0 II-19

Zion Nuclear Station Period of Record: April - June 2004 Stability Class - Slightly Stable - 250Ft-33Ft Delta-T (F)

Winds Measured at 35 Feet Wind Spee,d (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 7 35 30 0 76 NNE 8 32 21 0 63 NE 11 30 3 0 44 ENE 4 6 3 0 14 E 7 9 10 0 26 ESE 14 13 12 0 40 SE 4 12 6 0 22 SSE 4 15 29 0 51 S 4 44 18 0 67 SSW 5 23 11 0 46 SW 8 26 22 0 68 WSW 8 16 12 0 37 W 4 20 6 0 30 WNW 7 20 5 0 32 NW 7 14 1 0 22 NNW 10 10 6 0 26 Variable 0 0 0 0 0 Total 112 325 195 20 12 0 664 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 II-20

Zion Nuclear Station Period of Record: April - June 2004 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 1 8 4 0 0 0 13 1 8 3 0 0 0 12 NE 3 2 0 0 0 0 5 ENE 4 3 3 0 0 0 10 E 2 0 0 0 0 0 2 ESE 1 1 1 1 0 0 4 SE 4 4 2 0 0 0 10 SSE 6 13 13 0 0 32 S 7 34 6 1 0 48 SSW 5 10 2 0 0 17 SW 9 11 0 0 0 20 WSW 12 14 0 0. 0 26 W 11 9 0 0 0 20 WNW 4 8 0 0 0 12 NW 6 5 0 0 0 11 NNW 2 0 0 0 10 Variable 0 0 0 0 0 0 Total 78 138 34 2 0 252 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 II-21

Zion Nuclear Station Period of Record: April - June 2004 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 0 2 0 0 2 0

NNE 1 0 1 0 2 0

NE 1 3 0 0 4 0

ENE 0 1 0 0 1 0

E 0 1 0 0 1 0

ESE 1 2 0 0 3 0

SE 1 0 0 0 1 0

SSE 3 8 23 0 34 0

S 8 21 9 0 0 38 0

SSW 9 4 0 0 13 0

SW 6 6 0 0 12 0

WSW 15 10 0 0 25 0

W 14 10 0 0 24 0

WNW 4 12 0 0 16 0

NW 3 0 0 0 3 0

NNW 3 0 0 0 3 0

Variable 0 0 0 o o Total 69 80 33 0 0 0 182 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 II-22

Zion Nuclear Station Period of Record: April - June 2004 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 7 17 23 48 NNE 3 28 29 11 73 NE 2 13 0 2 17 ENE 2 1 0 0 3 E 5 4 4 0 13 ESE 5 4 2 0 11 SE 3 13 5 0 21 SSE o 1 1 1 3 S 0 0 0 0 1 SSW 0 0 1 5 13 SW 0 2 11 3 22 WSW 1 3 22 3 31 W 0 4 6 1 16 WNW 1 0 6 1 8 NW 1 0 3 3 7 NNW 0 1 1 1 3 Variable o 0 0 0 0 Total 0 23 81 108 54 24 290 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: 4 II-23

Zion Nuclear Station Period of Record: April - June 2004 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 6 NNE 0 0 7 NE 0 0 6 ENE 1 0 5 E 0 0 1 ESE 0 3 SE 0 2 SSE 0 1 S 0 0 SSW 0 4 SW 0 4 WSW 1 4 W 2 6 WNW 0 5 NW 0 2 NNW 0 1 Variable 0 0 Total 1 15 14 17 7 3 57 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: 4 II-24

Zion Nuclear Station Period of Record: April - June 2004 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 10 28 NNE 0 3 16 NE 0 1 7 ENE 0 0 4 E 1 0 5 ESE 0 1 7 SE 0 2 8 SSE 0 3 9 S 0 0 0 SSW 0 3 8 SW 0 0 8 WSW 0 6 11 W 0 2 5 WNW 0 2 5 NW 0 0 3 NNW 0, 2 2 Variable 0 0 0 Total 1 21 36 35 17 16 126 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 4 II-25

Zion Nuclear Station Period of Record: April - June 2004 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 11 31 40 63 30 176 NNE 13 15 20 5 0 53 NE 12 12 4 3 0 34 ENE 5 4 2 0 0 12 E 8 14 2 2 0 27 ESE 5 9 0 3 1 19 SE 3 16 4 0 0 23 SSE 5 14 16 4 0 42 S 2 5 0 3 0 10 SSW 2 5 7 7 8 29 SW 1 3 19 9 9 41 WSW 2 8 10 2 3 25 W 2 8 7 7 0 24 WNW 1 8 16 5 1 31 NW 0 9 7 0 3 19 NNW 3 5 7 3 5 23 Variable 0 0 0 0 0 0 Total 10 75 166 161 116 60 588 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 6 Hours of missing stability measurements in all stability classes: 4 II-26

Zion Nuclear Station Period of Record: April - June 2004 Stability Class - Slightly 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 19-24 > 24 Total N 1 6 21 35 14 1 78 NNE 1 11 22 27 2 2 65 NE 1 11 22 1 0 0 35 ENE 0 9 2 3 1 1 16 E 1 12 3 6 6 4 32 ESE 1 11 11 7 11 6 47 SE 1 9 9 6 6 2 33 SSE 1 3 7 34 16 1 62 S 1 0 16 17 6 0 40 SSW 1 1 13 18 8 10 51 SW 0 2 12 28 5 6 53 WSW 0 3 9 18 7 0 37 W 0 6 15 12 1 0 34 WNW 0 4 14 13 3 0 34 NW 0 2 10 4 0 0 16 NNW 0 7 9 7 1 0 24 Variable 0 0 0 0 0 0 0 Total 9 97 195 236 87 33 657 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 12 Hours of missing stability measurements in all stability classes: 4 II-27

Zion Nuclear Station Period of Record: April - June 2004 Stability Class - Moderately 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 19-24 > 24 Total N 0 3 6 9 1 0 19 NNE 3 7 8 7 0 0 25 NE 1 0 7 1 0 0 9 ENE 2 4 3 0 0 0 9 E 0 2 1 1 1 0 5 ESE 1 1 2 1 0 2 7 SE 0 2 7 5 2 0 16 SSE 0 7 9 10 6 0 32 S 1 0 17 18 6 1 43 SSW 1 0 8 11 1 0 21 SW 0 1 6 7 1 0 15 WSW 0 1 2 18 0 0 21 W 1 1 4 6 0 0 12 WNW 0 0 1 6 1 0 8 NW 0 2 2 3 0 0 7 NNW 0 1 2 1 0 0 4 Variable 0 0 0 0 0 0 0 Total 10 32 85 104 19 3 253 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: 4 II-28

Zion Nuclear Station Period of Record: April - June 2004 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 19-24 > 24 Total N 3 3 0 0 0 0 6 NNE 1 4 0 0 0 0 5 NE 0 0 2 0 0 0 2 ENE 0 3 1 0 0 0 4 E 2 0 1 0 0 0 3 ESE 0 0 0 0 0 0 0 SE 0 2 4 . 0 2 0 8 SSE 1 2 1 5 4 1 14 S 0 1 6 23 15 0 45 SSW 1 2 7 6 2 0 18 SW 1 2 6 10 0 0 19 WSW 0 3 4 4 2 0 13 W 0 1 4 8 1 0 14 WNW 0 1 6 5 0 0 12 NW 0 2 2 6 0 0 10 NNW 1 3 5 2 0 0 11 Variable 0 0 0 0 0 0 0 Total 10 29 49 69 26 1 184 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: I Hours of missing stability measurements in all stability classes: 4 II-29

Zion Nuclear Station Period of Record: July - September 2004 Stability Class - Extremely 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 2 6 11 NNE 6 29 35 NE 14 8 22 ENE 6 0 6 E 3 . 0 3 ESE 6 1 7 SE 5 6 11 SSE 0 1 1 S 0 1 1 SSW 1 1 2 SW 0 11 11 WSW 3 2 8 W 6 14 21 WNW 3 3 6 NW 4 2 6 NNW 0 2 2 Variable 0 0 0 Total 0 59 87 7 0 0 153 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 II-30

Zion Nuclear Station Period of Record: July - September 2004 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 0 0 5 NNE 0 0 5 NE 0 5 11 ENE 0 3 4 E 0 2 2 ESE 0 1 1 SE 0 2 5 SSE 0 0 2 S 0 0 1 SSW 0 0 4 SW 0 2 10 WSW 0 1 5 W 0 3 5 WNW 0 0 0 NW 0 1 1 NNW 0 0 1 Variable 0 0 0 Total 0 20 38 4 0 0 62 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 II-31

Zion Nuclear Station Period of Record: July - September 2004 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 0 0 1 1 3 5 NNE 0 8 7 0 0 15 NE 0 12 3 0 0 15 ENE 0 8 1 0 0 9 E 0 7 0 0 0 7 ESE 0 6 3 0 0 9 SE 0 5 9 0 0 14 SSE 0 4 5 0 0 9 S 0 1 0 0 0 1 SSW 0 5 2 1 0 8 SW 0 4 10 2 0 16 WSW 0 3 9 3 0 15 W 1 1 2 0 0 4 WNW 0 5 1 0 0 6 NW 0 1 1 0 0 2 NNW 0 1 0 0 0 1 Variable 0 0 0 0 0 0 Total 1 71 54 7 3 0 136 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 II-32

Zion Nuclear Station Period of Record: July - September 2004 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 2 13 54 27 0 99 NNE 1 39 42 6 0 88 NE 3 39 9 10 0 61 ENE 0 10 2 1 0 13 E 4 11 0 0 0 15 ESE 0 26 4 0 0 30 SE 1 27 16 0 0 44 SSE 0 37 58 5 0 100 S 1 26 13 2 0 42 SSW 4 19 9 2 0 34 SW 0 13 9 5 0 27 WSW 1 14 17 3 0 35 W 1 26 30 0 0 57 WNW 0 12 13 0 0 25 NW 5 6 7 0 0 18 NNW 0 10 10 0 0 20 Variable 0 0 0 0 0 0 Total 23 328 293 61 0 708 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 II-33

Zion Nuclear Station Period of Record: July - September 2004 Stability Class - Slightly 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 30 12 1 0 48 NNE 8 21 15 5 0 49 NE 4 4 2 0 0 10 ENE 7 2 3 1 0 13 E 2 5 0 0 0 7 ESE 6 16 1 0 0 23 SE 4 27 12 1 0 44 SSE 5 26 29 6 0 66 S 21 76 14 0 0 111 SSW 15 57 3 0 0 75 SW 5 17 2 0 0 24 WSW 10 25 5 0 0 40 W 3 35 7 0 0 45 WNW 6 18 1 0 0 25 NW 5 26 2 0 0 33 NNW 3 18 2 0 0 23 Variable 0 0 0 0 0 0 Total 109 403 110 14 0 636 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 0 Hours of missing stability measurements in all stability classes: 0 II-34

Zion Nuclear Station Period of Record: July - September 2004 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 2 4 0 0 0 0 6 3 0 0 0 0 0 3 NE 1 0 0 0 0 0 1 ENE 0 0 0 0 0 0 0 E 0 1 0 0 0 0 1 ESE 0 0 0 0 0 0 0 SE 1 2 0 0 0 0 3 SSE 2 1 1 0 0 0 4 S 15 39 0 0 0 0 54 SSW 31 24 0 0 0 0 55 SW 23 7 0 0 0 0 30 WSW 21 6 0 0 0 0 27 W 16 12 0 0 0 0 28 WNW 7 13 0 0 0 0 20

.NW 4 16 0 0 0 0 20 NNW 8 6 0 0 0 0 14 Variable 0 0 0 0 0 0 0 Total 134 131 1 0 0 0 266 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 II-35

Zion Nuclear Station Period of Record: July - September 2004 Stability Class - Extremely Stable - 250Ft-33Ft Delta-T (F)

Winds Measured at 35 Feet Wind Spee d (in mph)

Wind Direction 1-3 4-7 8-12 13-18 19-24 > 24 Total N 0 0 .0 0 NNE 0 0 0 0 NE 0 0 0 0 ENE 0 0 0 0 E 0 0 0 0 ESE 0 0 0 0 SE 0 0 0 0 SSE 1 1 0 2 S 4 6 0 10 SSW 12 7 0 19 SW 23 6 0 29 WSW 22 16 0 38 W 27 44 0 71 WNW 16 14 0 30 NW 4 S 0 9 NNW 0 0 0 0 Variable 0 0 0 0 Total 109 99 0 208 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 II-36

Zion Nuclear Station Period of Record: July - September 2004 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 5 9 14 NNE 26 6 36 NE 9 6 19 ENE 0 0 3 E 2 0 6 ESE 5 0 6 SE 7 4 12 SSE 0 0 0 S 0 1 1 SSW 1 2 3 SW 2 6 11 WSW 1 2 9 W 7 10 21 WNW 4 1 6 NW 4 2 6 NNW 0 0 0 Variable 0 0 0 Total 0 22 73 49 9 0 153 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: 12 II-37

Zion Nuclear Station Period of Record: July - September 2004 Stability Class - Moderately Unstable - 25OFt-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 5 NNE 8 NE 8 ENE 5 E 1 ESE 0 SE 6 SSE 2 S 2 SSW 3 SW 10 WSW 6 W 4 WNW 0 NW 2 NNW 0 Variable 0 Total 0 7 24 22 9 0 62 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: 12 II-38

Zion Nuclear Station Period of Record: July - September 2004 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 5 NNE 18 20 NE 10 12 ENE 3 7 E 1 6 ESE 2 8 SE 9 22 SSE 0 3 S 1 2 SSW 6 7 SW 6 17 WSW 5 15 W 0 3 WNW 3 7 NW 1 1 NNW 1 1 Variable 0 0 Total 1 21 66 28 16 4 136 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: 12 II-39

Zion Nuclear Station Period of Record: July - September 2004 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 5 12 44 31 18 111 NNE 20 36 22 8 0 87 NE 10 19 2 12 3 47 ENE 4 4 1 1 1 11 E 5 4 0 0 0 12 ESE 12 13 3 0 0 29 SE 14 35 30 4 0 85 SSE 5 35 21 5 1 67 S 5 12 7 2 2 28 SSW 6 17 10 2 1 36 SW 4 14 10 5 0 33 WSW 4 7 23 6 1 41 W 3 21 27 5 0 57 WNW 4 8 13 0 0 25 NW 2 7 6 0 0 16 NNW 2 7 11 1 0 22 Variable 0 0 0 0 0 0 Total 12 105 251 230 82 27 707 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 stabil.ity classes: 12 II-40

• Zion Nuclear Station Period of Record: July - September 2004 Stability Class - Slightly 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 19-24 > 24 Total N 1 3 20 21 5 1 51 NNE 1 7 19 16 8 4 55 NE 3 6 2 0 2 0 13 ENE 1 6 1 3 2 0 13 E 2 3 4 3 0 0 12 ESE 2 10 9 8 2 0 31 SE 1 7 15 17 11 0 51 SSE 1 11 34 38 25 0 109 S 0 7 14 26 6 0 53 SSW 1 7 31 32 1 0 72 SW 1 2 23 9 0 0 35 WSW 2 5 14 16 0 0 37 W 0 1 14 32 0 0 47 WNW 0 3 4 15 1 0 23 NW 0 3 8 12 2 0 25 NNW 0 3 9 10 1 0 23 Variable 0 0 0 0 0 0 0 Total 16 84 221 258 66 5 650 Hours of calm in this stability class: 0 Hours of missing wind measurements in this stability class: 2 Hours of missing stability measurements in all stability classes: 12 II-41

Zion Nuclear Station Period of Record: July - September 2004 Stability Class - Moderately 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 19-24 > 24 Total N 4 7 0 0 12 NNE 5 10 0 0 15 NE 0 2 1 0 5 ENE 1 0 0 0 2 E 4 1 0 0 7 ESE 3 1 1 0 7 SE 4 9 6 0 20 SSE 8 11 21 0 42 S 4 21 17 0 43 SSW 4 9 20 0 33 SW 2 7 5 0 16 WSW 2 8 9 0 20 W 3 7 9 0 19 WNW 1 5 3 0 10 NW 0 3 3 0 6 NNW 1 7 8 0 16 Variable 0 0 0 0 0 Total 12 46 108 103 0 273 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: 12 II-42

Zion Nuclear Station Period of Record: July - September 2004 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 19-24 > 24 Total N 2 5 3 2 0 12 NNE 1 10 1 0 0 12 NE 2 5 1 0 0 8 ENE 1 2 0 1 0 4 E 1 2 0 0 0 3 ESE 0 4 0 0 0 4 SE 0 3 0 0 0 3 SSE 2 3 1 3 0 11 S 1 3 6 7 0 17 SSW 0 6 21 10 0 37 SW 0 8 6 8 0 22 WSW 0 5 15 7 0 30 W 0 2 4 12 0 25 WNW 0 4 2 5 0 11 NW 1 4 1 2 0 8 NNW 0 0 2 0 0 2 Variable 0 0 0 0 0 0 Total 11 66 63 57 12 0 209 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: 12 II-43

Zion Nuclear Station Period of Record: October - December2004 Stability Class - Extremely 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 Total 0 5 13 1 0 0 19 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 II-44

Zion Nuclear Station Period of Record: October - December2004 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 0 0

NNE 0 0

NE 0 0

ENE 1 0

E 0 0

ESE 1 0

SE 1 0

SSE 0 0

S 0 0 0

SSW 0 0

SW 0 0

WSW 0 0

W 0 0

WNW 0 0

NW 0 0

NNW 0 0

Variable 0 Total 0 3 14 7 0 0 24 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 II-45

Zion Nuclear Station Period of Record: October - December2004 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 0 0 0

NNE 1 7 0

NE 0 5 0

ENE 0 1 0

E 1 8 0

ESE 2 3 0

SE 0 0 0

SSE 1 2 0

S 0 2 0

SSW 0 3 0

SW 1 5 0

WSW 0 3 0

W 1 12 0

WNW 0 10 0

NW 1 10 0

NNW 0 2 0

Variable 0 0 Total 0 8 45 20 0 0 73 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 II-46

Zion Nuclear Station Period of Record: October - December2004 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 0 23 36 12 3 0 74 NNE 2 26 37 14 1 0 80 NE 1 25 27 10 6 0 69 ENE 1 8 24 22 5 0 60 E 1 8 26 22 0 0 57 ESE 2 15 21 16 8 0 62 SE 0 10 6 4 0 0 20 SSE 1 14 29 30 5 0 79 S 2 23 37 10 0 0 72 SSW 4 45 48 10 2 0 109 SW 2 42 45 37 1 1 128 WSW 4 29 32 26 2 0 93 W 4 26 58 22 1 0 111 WNW 7 34 56 24 3 0 124 NW 10 31 60 22 0 0 123 NNW 5 9 52 17 0 0 83 Variable 0 0 0 0 0 0 0 Total 46 368 594 298 37 1 1344 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 II-47

Zion Nuclear Station Period of Record: October - December2004 Stability Class - Slightly 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 3 8 2 0 0 13 NNE 1 2 0 1 0 4 NE 1 4 2 1 0 9 ENE 2 3 9 0 0 14 E 1 4 5 0 0 10 ESE 2 3 3 0 0 8 SE 7 7 0 0 0 14 SSE 4 13 6 5 0 30 S 4 23 16 0 0 43 SSW 5 34 19 4 0 62 SW 5 24 44 11 0 84 WSW 8 15 37 0 0 60 W 12 29 14 1 0 56 WNW 14 23 10 0 0 47 NW 14 32 6 0 0 52 NNW 4 23 9 0 0 36 Variable 0 0 0 0 0 0 Total 87 247 182 23 3 0 542 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 II-48

Zion Nuclear Station Period of Record: October - December2004 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 2 0 3 NNE 1 0 1 NE 0 0 2 ENE 1 0 2 E 0 0 0 ESE 0 0 1 SE 1 0 1 SSE 1 0 4 S 9 0 11 SSW 11 0 18 SW 5 0 12 WSW 4 0 5 W 9 0 16 WNW 16 0 20 NW 5 0 12 NNW 6 0 8 Variable 0 0 0 Total 40 71 0 116 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 II-49

Zion Nuclear Station Period of Record: October - December2004 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 1 3 NNE 0 0 NE 0 0 ENE 0 0 E 0 0 ESE 0 0 SE 0 0 SSE 0 0 S 2 3 SSW 4 8 SW 11 14 WSW 5 10 W 4 5 WNW 13 1s NW 3 5 NNW 0 5 Variable 0 0 Total 27 43 1 0 0 0 71 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 II-50

Zion Nuclear Station Period of Record: October - December2004 Stability Class - Extremely Unstable - 25OFt-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 0 10 8 1 0 19 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: 18 II-51

Zion Nuclear Station Period of Record: October - December2004 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 NNE 0 0 NE 0 1 ENE 0 0 E 0 1 ESE 0 0 SE 0 0 SSE 0 0 S 0 0 SSW 0 0 SW 0 0 WSW 0 0 W 0 0 WNW 0 0 NW 0 0 NNW 0 0 Variable 0 0 Total 0 2 6 8 6 2 24 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: 18 II-52

Zion Nuclear Station Period of Record: October - December2004 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 0 0

NNE 0 9 0

NE 0 3 0

ENE 0 2 0

E 0 8 0

ESE 0 2 0

SE 0 0 1 0

SSE 0 1 0

S 0 2 0

SSW 0 3 0

SW 0 5 0

WSW 2 S 0

W 1 11 WNW 0 0 1 7 3 1 12 NW 0 0 2 2 S 0 9 NNW 0 0 0 0 0 0 0 Variable 0 0 0 0 0 0 0 Total 0 1 22 28 18 4 73 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: 18 II-53

Zion Nuclear Station Period of Record: October - December2004 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 1____ - - - - - - - -

N 0 1 17 31 13 7 69 NNE 0 13 18 37 15 11 94 NE 0 2 19 24 3 7 55 ENE 1 1 11 21 18 12 64 E 0 0 16 20 14 9 59 ESE 0 5 15 11 8 9 48 SE 1 7 14 17 19 2 60 SSE 1 3 15 22 9 6 56 S 0 3 24 36 14 5 82 SSW 0 7 37 44 21 6 115 SW 0 9 35 36 31 7 118 WSW 2 9 22 22 24 11 90 W 2 11 18 37 38 13 119 WNW 2 10 30 54 15 19 130 NW 4 8 19 61 35 4 131 NNW 0 3 9 25 11 6 54 Variable 0 0 0 0 0 0 0 Total 13 92 319 498 288 134 1344 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: 18 II-54

Zion Nuclear Station Period of Record: October - December2004 Stability Class - Slightly 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 19-24 > 24 Total N 1 5 11 0 0 17 NNE 2 2 4 1 2 11 NE 2 1 5 0 0 8 ENE 1 2 11 1 0 15 E 2 2 2 2 0 8 ESE 4 6 2 2 0 14 SE 4 7 1 0 1 13 SSE 5* 10 12 5 6 39 S 4 15 16 8 1 45 SSW 1 17 22 18 1 59 SW 4 15 43 20 3 85 WSW 4 10 27 10 0 53 W 5 11 22 9 0 47 WNW 1 10 16 2 0 30 NW 6 21 22 4 0 54 NNW 7 27 9 2 0 45 Variable 0 0 0 0 0 0 Total 6 53 161 225 84 14 543 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: 18 II-55

Zion Nuclear Station Period of Record: October - December2004 Stability Class - Moderately 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 19-24 > 24 Total N 0 6 3 3 0 12 NNE 0 2 1 2 0 5 NE 1 0 2 0 0 3' ENE 0 1 2 1 0 4 E 0 1 1 0 0 2 ESE 2 1 0 0 0 3 SE 1 2 3 0 0 6 SSE 0 1 2 1 2 6 S 0 0 5 6 0 13 SSW 0 1 1 9 0 11 SW 0 0 2 4 0 8 WSW 0 0 2 5 0 7 W 1 2 0 1 0 4 WNW 0 0 2 10 0 12 NW 0 0 2 5 0 7 NNW 0 4 7 2 0 13 Variable 0 0 0 0 0 0 Total 5 21 35 49 4 2 116 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: 18 II-56

Zion Nuclear Station Period of Record: October - December2004 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 19-24 > 24 Total N 4 NNE 4 NE 4 ENE 7 E 3 ESE 1 SE 0 SSE 0 S 8 SSW 12 SW 13 WSW 5 W 0 WNW 0 NW 5 NNW 5 Variable 0 Total 1 21 23 21 4 1 71 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: 18 II-57

ZION APPENDIX III 2004 REMP SAMPLE RESULTS IH-1

ZION TABLE OF CONTENTS List of Tables ........................... 111-3

1.0 INTRODUCTION

............................. 111-4 2.0 LISTING OF MISSED SAMPLES ............................ 111-5 3.0 LISTING OF SAMPLE ANOMALIES ........................... 111-6 4.0 2004 ANALYSES DATA TABLES ............................................ 11I-7 5.0 LAND USE CENSUS ......................... 111-25 6.0 TLD DATA ......................... 111-27 7.0 GRAPHS OF DATA TRENDS ......................... 111-29 111-2

ZION LIST OF TABLES No. Title Page 1 Airborne Particulates .................................. 111-8 2 Airborne Particulates, Quarterly Composites ................................. 111-11 4 Fish, Edible Portions .................................. 111-13 5 Bottom Sediments ................................. 111-15 9 Public Water ................................. 111-16 I11-3

ZION

1.0 INTRODUCTION

The following constitutes the 2004 Progress Report for the Radiological Environmental Monitoring Program conducted at the Zion Nuclear Power Station, Zion, Illinois. Results of completed analyses are presented in the attached tables.

Data obtained in the program are well within the ranges previously encountered in the program and to be expected in the environmental media sampled.

For all gamma isotopic analyses, spectrum is computer scanned from 80 to 2048 keV. Specifically included are Mn-54, Fe-59, Co-58, Co-60,;Zn-65, Zr-95, Nb-95,1-131, Ba-140, La-140, Cs-134 and Cs-137. Naturally occurring gamma-emitters, such as K-40 and Ra daughters, are frequently detected but not listed here. The data is reported in the format of x+/-2s;2TPU, where "x" is the significant result, "s" is the one standard deviation counting uncertainty, and TPU is the total propagated uncertainty at the one sigma confidence level.

Locations denoted by a "(C)" after site code refer to control locations.

All concentrations, except gross beta, are decay corrected to the time of collection.

TLD data is provided by Exelon Generation Company.

Deviations from Scheduled Sampling and Corrective Actions Taken All samples were collected within the scheduled period unless noted otherwise in the Listing of Missed Samples.

Unusual Environmental Measurements None for 2004 Sample Type Location Collection Comments Code Date III-4

ZION 2.0 LISTING OF MISSED SAMPLES Location Expected Location Sample Type Collection Reason Code Date PW Z-18 05-19-04 Unable to collect sample; "raw water" tap disconnected due to construction.

PW Z-18 09-29-04 No sample; plant shut down due to construction.

PW Z-16 11-24-04 No sample due to maintanence work at location.

III-5

ZION 3.0 LISTING OF SAMPLE ANOMALIES Sample Type Location Clti Reason Code Date A Z-02 09-01-04 Low reading of 162.9 due to power outage possibly from storms in area.

A Z-03 09-01-04 Low reading of 162.9 due to power outage possibly from storms in area.

A Z-02 11-03-04 No apparent reason for low reading of 160.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br />; possibly due to storms in area.

A Z-03 11-03-04 No apparent reason for low reading of 160.4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />; possibly due to storms in area.

III-6

ZION 4.0 2004 ANALYSES DATA TABLES III-7

ZION Table I. Airborne Particulates Collection: Airborne Particulates - Continuous; weekly exchange ODCM-Required LLDs: 0.01 pCi/rn for Gross Beta Units: 10 .2 pCi/m3 Z-01 Onsite No. 1, Southside Date Volume Gross Date Volume Gross Collected (i 3 ) Beta Collected (m') Beta 01-07-04 327 3.3 +/-0.4;0.7 07-07-04 284 1.4

• 0.3; 0.4 01-14-04 285 3.5 +/- 0.4; 0.8 07-14-04 285 1.4 0.3; 0.4 01-21-04 285 1.9+/-0.3;0.5 07-21-04 285 2.2 0.3; 0.5 01-28-04 285 2.1 +/-0.4;0.5 07-28-04 286 2.1 +/-0.4 ;0.5 02-04-04 284 4.6 +/- 0.4; 0.9 08-04-04 285 3.2 +/- 0.4; 0.7 02-11-04 286 3.7 4 0.4; 0.8 08-11-04 285 2.1 +/-0.4;0.5 02-18-04 284 2.6+/-0.4;0.6 08-18-04 285 1.8 +/-0.3 ;0.4 02-25-04 285 2.6 +/- 0.4; 0.6 08-25-04 284 2.6 +/- 0.3; 0.6 03-03-04 285 1.9 4 0.3; 0.5 09-01-04 285 1.4 +/- 0.3; 0.4 03-10-04 285 2.2 +/-0.4 ;0.6 09-08-04 284 3.1 +/- 0.4 ;0.7 03-17-04 285 1.9 +/-0.3; 0.5 09-15-04 285 2.7 +/- 0.4 0.6 03-24-04 289 1.5 +/- 0.3; 0.4 09-22-04 295 2.7 +/- 0.4; 0.6 03-31-04 286 1.5 +/-0.3 0.4 09-29-04 279 2.5 +/- 0.3; 0.6 1st Qtr. Mean+/-s.d. 2.6+/-1.0 3rd Qtr. Mean+/-s.d. 2.2+/-0.6 04-07-04 283 2.4 +/- 0.4; 0.6 10-06-04 285 2.2 +/- 0.3 0.5 04-14-04 291 1.5 +/-0.3; 0.4 10-13-04 285 2.4 +/-0.3 ;0.5 04-21-04 283 2.6 +/- 0.3 0.6 10-20-04 283 1.5 +/- 0.3; 0.4 04-28-04 284 1.5 +/- 0.3 0.4 10-27-04 286 2.1 +/-0.3 ;0.5 05-05-04 285 1.6 4 0.3; 0.4 11-03-04 287 1.6 +/- 0.3; 0.4 05-12-04 283 2.5 +/-0.3;0.6 11-10-04 285 2.7 +/- 0.4; 0.6 05-19-04 287 1.1 +/-0.3;0.4 11-17-04 284 2.5 +/- 0.3; 0.5 05-26-04 285 0.9 +/- 0.3; 0.3 11-24-04 285 2.9 +/- 0.4; 0.6 06-02-04 284 1.0 +/- 0.3; 0.3 12-01-04 285 1.7 +/- 0.4; 0.5 06-09-04 285 1.7 +/- 0.3; 0.4 12-08-04 285 2.9 +/- 0.4; 0.7 06-16-04 284 1.0 +/- 0.3; 0.3 12-15-04 285 3.5+/-0.4;0.8 06-23-04 288 1.5 +/- 0.3 0.4 12-22-04 284 2.7 +/- 0.4 0.6 06-30-04 284 1.3 +/- 0.3 0.4 12-29-04 287 3.5 +/- 0.4 0.7 2nd Qtr. Mean+/-s.d. 1.6+0.6 4th Qtr. Meanis.d. 2.5+/-0.6 III -8

ZION Table 1. Airborne Particulates Collection: Aiirborne Particulates - Continuous; weekly exchange ODCM-Required LLDs: 0.01 pCi/m' for Gross Beta Units: 10 2 pCilm' Z-02 Onsite No. 2, Westside Date Volume Gross Date Volume Gross Collected (m') Beta Collected (m') Beta 01-07-04 327 3.1 40.4;0.7 07-07-04 284 1.1 +/-0.3;0.4 01-14-04 285 3.2 + 0.4; 0.7 07-14-04 285 0.9 +/- 0.2; 0.3 01-21-04 284 1.7 +0.3 ;0.4 07-21-04 285 1.4 +/- 0.3; 0.4 01-28-04 284 1.4 + 0.3; 0.4 07-28-04 286 1.1 +/- 0.3; 0.4 02-04-04 286 2.9 +/- 0.4; 0.6 08-04-04 285 2.3 A 0.3; 0.5 02-11-04 290 3.7 + 0.4; 0.8 08-11-04 285 1.3 4 0.3; 0.4 02-18-04 284 4.1 +0.4;0.9 08-18-04 285 1.6 +/- 0.3; 0.4 02-25-04 285 2.8 + 0.4; 0.6 08-25-04 284 1.7 +/- 0.3; 0.4 03-03-04 285 1.9 4 0.3 ;0.5 09-01-04 276' 1.140.3;0.3 03-10-04 285 3.4 +/- 0.4; 0.8 09-08-04 285 2.6 +/- 0.3; 0.6 03-17-04 285 2.0 +/- 0.4; 0.5 09-15-04 285 1.6 +/- 0.3; 0.4 03-24-04 284 1.3 +/- 0.3 0.4 09-22-04 290 2.2 +/- 0.4; 0.5 03-31-04 286 1.3 +/- 0.3; 0.4 09-29-04 280 1.9 +/- 0.3 0.5 Ist Qtr. Meanss.d. 2.5+/-1.0 3rd Qtr. Meanss.d. 1.6+/-0.5 04-07-04 283 1.6 + 0.3; 0.4 10-06-04 285 1.3 +/-0.3 ;0.4 04-14-04 287 1.2 + 0.3; 0.4 10-13-04 285 2.1 +/-0.3 ;0.5 04-21-04 283 2.1 +/-0.3;0.5 10-20-04 283 1.2 +/- 0.3 0.4 04-28-04 284 1.5 + 0.3 0.4 10-27-04 282 2.3 40.3 ;0.5 05-05-04 285 1.4 + 0.3; 0.4 11-03-04 268b 2.1 +/-0.3 ;0.5 05-12-04 280 2.0 +/- 0.3 0.5 11-10-04 281 2.4 +/-0.4 ;0.6 05-19-04 287 0.9 +/-0.3 ;0.3 11-17-04 280 2.8 +/- 0.3; 0.6 05-26-04 285 0.9 + 0.3; 0.3 11-24-04 281 3.3 4 0.4; 0.7 06-02-04 285 1.0 + 0.3 0.3 12-01-04 281 1.5 +/-0.4 ;0.4 06-09-04 284 1.6 4 0.3; 0.4 12-08-04 280 2.5 +/- 0.4; 0.6 06-16-04 284 0.9+/-0.3;0.3 12-15-04 280 3.6 0.4;0.8 06-23-04 287 0.9 +/- 0.3; 0.3 12-22-04 280 2.1 +/-0.4;0.5 06-30-04 285 1.2 4 0.3 0.3 12-29-04 282 3.8 0.4;0.8 2nd Qtr. Meanhs.d. 1.3 0.4 4th Qtr. Meanss.d. 2.4+/-0.8

'Volume low; meter reading of 162.9 hours1.041667e-4 days <br />0.0025 hours <br />1.488095e-5 weeks <br />3.4245e-6 months <br /> possibly due to storms in area.

' Volume low; meter reading of 160.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> possibly due to storms in area.

III -9

ZION Table 1. Airborne Particulates Collection: Aiirbome Particulates - Continuous; weekly exchange ODCM-Required LLDs: 0.01 pCi/m' for Gross Beta Units: 10 .2 pCi&m' Z-03 Onsite No. 3, Northside Date Volume Gross Date Volume Gross Collected (m') Beta Collected (m') Beta 01-07-04 327 3.8 +/- 0.4; 0.8 07-07-04 284 1.5 - 0.3; 0.4 01-14-04 285 3.6 +/- 0.4; 0.8 07-14-04 285 1.0 +/- 0.3; 0.3 01-21-04 285 2.4 0.3;0.5 07-21-04 285 2.0 +/- 0.3 0.5 01-28-04 284 2.4 +/- 0.4; 0.6 07-28-04 286 2.1 +/-0.4;0.5 02-04-04 286 3.7 + 0.4; 0.8 08-04-04 285 3.2 +/- 0.4; 0.7 02-11-04 280 3.5 + 0.4; 0.7 08-11-04 285 1.9 +/- 0.3; 0.5 02-18-04 285 4.5 +/-0.5 ;0.9 08-18-04 285 2.3 +/-0.3 ;0.5 02-25-04 285 2.6 +/- 0.4; 0.6 08-25-04 284 2.0 +/- 0.3; 0.5 03-03-04 285 1.8 +/- 0.3 0.5 09-01-04 276' 1.2 +/- 0.3 0.4 03-10-04 285 3.0 +/- 0.4; 0.7 09-08-04 285 3.2 +/- 0.4; 0.7 03-17-04 285 2.1 +/-0.4;0.5 09-15-04 285 2.2 +/- 0.4; 0.5 03-24-04 284 1.9 +/- 0.3; 0.5 09-22-04 290 2.2 +/- 0.4; 0.5 03-31-04 287 1.6 +/- 0.3; 0.4 09-29-04 280 2.7 +/- 0.3; 0.6 1st Qtr. Meanss.d. 2.8+/-0.9 3rd Qtr. Meanss.d. 2.1+/-0.7 04-07-04 282 2.9 +/- 0.4; 0.7 10-06-04 285 1.9 +/- 0.3; 0.5 04-14-04 287 1.5 +/- 0.3; 0.4 10-13-04 285 2.2 0.3; 0.5 04-21-04 283 2.6 +/- 0.3 0.6 10-20-04 283 1.1 I0.3;0.4 04-28-04 284 1.7 +/- 0.3; 0.5 10-27-04 287 2.4 4 0.3; 0.5 05-05-04 285 1.6 +/- 0.3; 0.5 11-03-04 272b 2.0

• 0.3; 0.5 05-12-04 280 2.3 +/- 0.3 0.5 11-10-04 285 2.0 0.3; 0.5 05-19-04 286 1.0 +/- 0.3; 0.4 11-17-04 284 2.5 *0.3; 0.5 05-26-04 285 1.0 +/- 0.3; 0.4 11-24-04 285 3.0 0.4;0.6 06-02-04 285 1.1 I0.3 ;0.3 12-01-04 286 1.6 0.4; 0.5 06-09-04 280 2.0 + 0.3; 0.5 12-08-04 285 2.7

• 0.4; 0.6 06-16-04 280 1.2 0.3 0.4 12-15-04 285 3.4 *0.4 ;0.7 06-23-04 282 1.3 d0.3 0.4 12-22-04 284 2.5 i0.4 0.6 06-30-04 280 1.5 0.3 0.4 12-29-04 287 4.0 *0.4 ;0.8 2nd Qtr. Mean~s.d. 1.7+/-0.6 4th Qtr. Meanss.d. 2.4+/-0.7

' Volume low; meter reading of 162.9 hours1.041667e-4 days <br />0.0025 hours <br />1.488095e-5 weeks <br />3.4245e-6 months <br /> possibly due to storms in area.

' Volume low; meter reading of 160.4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> possibly due to storms in area.

III -10

ZION Table 2. Airborne Particulates Collection: Quarterly composites of weekly collections ODCM-Required LLDs: Cs-134 = 0.01, Cs-137 = 0.01 pCi/m3 Other LLDs: Mn-54 = 0.01; Fe-59 = 0.015; Co-58, Co-60 = 0.01; Zn-65 = 0.04; Zr/Nb-95 = 0.01; Ba/La-140 = 0.025 pCi/r 3 Units: 104 pCi/rr?

Sample Description and Concentration Z-01 Onsite No. 1, Southside 2004 Collection Ist Qtr. 2nd Qtr. 3rd Qtr. 4th Qtr.

Period Lab Code ZAP-1988 ZAP-4339 ZAP-6557 ZAP-7846,7 Volume 3,759 3,715 3,714 3,713 Mn-54 -6.5 + 5.8 ; 5.9 -2.1 4 4.3 ; 4.3 0.9 +/-5.7 ;5.7 3.9*3.6;3.7 Fe-59 9.8 + 11.2 ; 11.3 3.7* 10.1 ; 10.1 -8.4 + 11.8 ; 11.9 0.6

• 7.6 ;7.6 Co-58 7.2*5.0;5.2 0.3*5.0;5.0 -11.4 +/-6.7 ;7.0 -3.6 +/- 3.7; 3.8 Co-60 -3.0

• 6.2; 6.2 2.6* 5.0; 5.0 0.1

• 4.2 ; 4.2 2.9 + 4.2 ; 4.2 Zn-65 10.2* 13.1 ; 13.3 -23.6* 14.9; 15.4 -14.6+ 13.0; 13.2 9.2

• 8.6 ;8.8 Nb/Zr-95 1.2 +/-4.9; 4.9 -12.1 +5.2; 5.7 -11.3 *6.3; 6.6 1.8 +/-3.7; 3.7 Cs-134 2.8*5.7 ;5.7 -2.2 + 6.7 ; 6.7 0.6* 6.4; 6.4 1.6*4.9 ;4.9 Cs-137 3.64 6.4 ; 6.4 -1.1 + 6.4 ; 6.4 4.1 *4.2 ;4.3 -0.8 +/- 4.5 ; 4.5 Ba/La-140 -9.4 +/- 7.2 ;7.4 -18.2 + 5.7;6.5 -1.6 +/- 5.4;5.4 41.1 +/- 5.2;9.0 Z-02 Onsite No. 2, Westside 2004 Collection Ist Qtr. 2nd Qtr. 3rd Qtr. 4th Qtr.

Period Lab Code ZAP-1989,90 ZAP-4340 ZAP-6558 ZAP-7848 Volume 3,758 3,706 3,701 3,655 Mn-54 2.844.7 ;4.8 -5.3 *4.9 ;5.0 -4.0 4 6.0 ; 6.0 -3.1

• 5.7 ; 5.7 Fe-59 -5.4+ 6.3 ;6.3 -9.2

• 7.5 ; 7.7 -10.9 + 11.6 ; 11.7 -29.6* 13.2; 14.2 Co-58 2.1+/-3.6 ;3.6 2.5 *4.1 ;4.1 -2.6 +/- 5.7; 5.7 1.8 *4.9 ;4.9 Co-60 4.5

• 4.5 ; 4.5 5.8*4.0 ;4.1 1.0* 4.5 ;4.5 7.3

• 6.5 ; 6.6 Zn-65 -1.6 + 8.7; 8.7 1.3

• 9.9; 9.9 4.1 + 12.1 ; 12.1 4.9

• 10.6; 10.6 Nb/Zr-95 -1.3 *4.2; 4.2 0.9 *4.6; 4.6 1.2 +5.3; 5.3 -14.6 *5.6; 6.2 Cs-134 2.9* 3.6 ;3.7 4.1* 5.0 ;5.1 4.0 4 6.6 ; 6.6 -2.7

• 6.5 ; 6.5 Cs-137 0.4*4.2 ;4.2 -2.3

• 5.3; 5.3 -2.4

• 6.2 ; 6.2 -2.2* 5.0 ;5.1 Ba/La-140 -1.0 + 3.7;3.7 -3.4

• 5.8 ;5.8 18.0

• 6.2;6.9 -26.9

• 8.6;9.8 III -11

ZION Table 2. Airborne Particulates Collection: Quarterly composites of weekly collections ODCM-Required LLDs: Cs-134 = 0.01, Cs-137 = 0.01 pCi/m' Other LLDs: Mn-54 = 0.01; Fe-59 = 0.015; Co-58, Co-60 = 0.01; Zn-65 = 0.04; Zr/Nb-95 = 0.01; Ba/La-140 = 0.025 pCi/m' Units: 104 pCi/r' Sample Description and Concentration Z-03 Onsite No. 3. Northside 2004 Collection I st Qtr. 2nd Qtr. 3rd Qtr. 4th Qtr.

Period Lab Code ZAP-1991 ZAP-4341 ZAP-6559 ZAP-7849 Volume 3,749 3,706 3,701 3,700 Mn-54 2.4 4 6.4 ; 6.4 -2.0 +/- 6.5 ; 6.5 3.4+/- 3.6 ;3.6 -0.9 +/- 6.5 ; 6.5 Fe-59 2.2+/- 8.4; 8.4 8.1+/- 8.8 ;8.9 -14.5 +/- 9.6 ; 9.9 17.2+/-9.1 ;9.6 Co-58 0.8+/-5.6 ;5.6 -2.0 +/- 6.0 ; 6.0 -3.3+/-5.1 ;5.2 0.3 +/-4.6 ; 4.6 Co-60 0.3 +/-5.9;5.9 0.2+/-8.9; 8.9 5.4+/-5.9;6.0 6.2 +/- 4.5 ; 4.6 Zn-65 -4.0+/- 10.1 ; 10.1 8.3 +/- 14.7; 14.8 3.2+/- 10.0; 10.0 -12.1 +/- 11.9 ; 12.1 Nb/Zr-95 5.4 +/-5.3 ; 5.4 9.2 +/-4.9; 5.1 -1.7 +/-6.3; 6.3 -0.4 +/-6.1; 6.1 Cs-134 -1.4+/-6.5 ;6.5 5.9+/- 7.3 ;7.4 3.7+/-4.7 ;4.7 4.1 +/-6.0;6.1 Cs-137 5.6 +/- 4.6; 4.7 0.2 +/- 7.3 ; 7.3 2.8 +/- 5.5 ; 5.5 1.8 +/-4.8; 4.8 Ba/La-140 22.9 +/- 3.7; 5.5 -13.9 +/- 8.4;8.8 19.7 +/- 3.0;4.6 -35.4 +/- 6.2;8.8 III -12

ZION Table 4. Fish, Edible Portions Collection: Semiannually ODCM-Required LLDs: Mn-54 = 0.13, Fe-59 = 0.26, Co-58 = 0.13, Co-60 = 0.13, Zn-65 = 0.26, Cs-134 = 0.1, Cs-137 = 0.1 pCi/g wet weight Other LLDs: Zr/Nb-95 = 0.20, BaILa-140 = 0.30 pCilg wet weight Units: 10 2 pCi/g wet weight Sample Description and Concentration Z-26 (C) Lake Michi-an Nearsite Date Collected 05-12-04 10-13-04 Lab Code ZF-2297 ZF-5936 Type Lake Trout Bass/Trout Mn-54 -1. I +/- .9 ; 19 -1.4 4 1.2; 1.2 Fe-59 4.9 +/-3.0 ;3.1 5.1 +2.3 ;2.4 Co-58 -1.4 +/- 1.4 ; 1.4 -0.3 +/- 1.1; 1.1 Co-60 -1.5 4 2.6 ;2.6 0.4k 1.1 ; 1.1 Zn-65 -2.5 + 3.8 ; 3.8 0.3 +/- 2.6 ; 2.6 Nb/Zr-95 0.54 1.4; 1.4 -1.1 + 1.2 ; 1.2 Cs-134 -0.1 + 1.9; 1.9 0.9k 1.4; 1.4 Cs-137 1.2d 1.7; 1.7 1.4+/- 1.4; 1.4 Ba/La-140 4.4 +/- 1.4 ; 1.5 4.3+/- 1.0; 1.2 III - 13

ZION Table 4. Fish, Edible Portions Collection: Semiannually ODCM-Required LLDs: Mn-54 = 0.13, Fe-59 = 0.26, Co-58 = 0.13, Co-60 = 0.13, Zn-65 = 0.26, Cs-134 = 0.1, Cs-137 = 0.1 pCi/g wet weight Other LLDs: Zr/Nb-95 = 0.20, Ba/La-140 = 0.30 pCi/g wet weight Units: 10 2 pCi/g wet weight Sample Description and Concentration Z-27 (C) Lake Michiuan Farsite Date Collected 05-26-04 05-26-04 10-13-04 10-13-04 Lab Code ZF-2522 ZF-2523 ZF-6342 ZF-6343 Type White Sucker Smallmouth Bass Lake Trout Burbot Mn-54 0.1 4 1.1 ; 1.1 -0.1 +/- 0.8 ; 0.8 0.1 4 1.1 ; 1.1 0.4 +/- 0.9 ; 0.9 Fe-59 0.2 + 2.7 ; 2.7 1.0k 1.7; 1.7 -0.4 4 1.8; 1.8 -2.7 +/- 1.9; 2.0 Co-58 1.1 +/- 1.0; 1.1 1.4 +/-0.7 ; 0.7 -0.4 +/- 1.1 ; 1.1 -0.8 +/- 1.0; 1.0 Co-60 -0.2 +/- 1.1; 1.1 0.2 +/- 0.9 ; 0.9 1.0 +/-1.2; 1.2 0.4 0.9 ;0.9 Zn-65 1.7 +/-3.1 ; 3.1 -2.2 +/- 2.5 ; 2.5 0.5 - 2.6 ; 2.6 2.1 +/- 2.3 ; 2.3 Nb/Zr-95 1.0d 1.0; 1.0 -0.9 +/- 0.8 ; 0.8 -1.0 +/- 0.8 ; 0.8 -1.5 +/- 0.8 ; 0.8 Cs-134 0.4 +/- 1.5 ; 1.5 -0.5 +/- 1.0 ; 1.0 0.3 +/- 0.9 ; 0.9 0.6+/- 1.1 ; 1.1 Cs-137 0.1 + 1.4; 1.4 2.1 +/-1.0; 1.0 6.6 +/- 1.9 ; 2.1 4.5+/- 1.9 ;2.0 Ba/La-140 0.7+ 1.7; 1.7 -7.3 4- 0.9 ; 1.3 -0.4 +/- 1.1; 1.1 -12.7+/-0.9; 1.9 III- 14

ZION Table 5. Bottom Sediments Collection: Semiannually ODCM-Required LLDs: 0.15 pCi/g for Cs-134 and 0.18 for Cs-137 Other LLDs: Mn-54 = 0.15; Fe-59 = 0.60; Co-58, Co-60 = 0.10; Zn-65 = 0.60; Zr/Nb-95 = 0.20; Ba/La = 0.60 pCi/g dry weight Units: 10 ' pCi/g dry weight Sample Description and Concentration Z-25 Lake Michigan. Illinois Beach State Park Date Collected 05-05-04 10-06-04 Lab Code ZBS-2072 ZBS-5709 Mn-54 0.1 +/- 1.0 ; 1.0 0.1 +/-0.8 ;0.8 Fe-59 5.3 2.8 ;2.9 0.4+ 1.6; 1.6 Co-58 -0.2 +/- 1.0; 1.0 -1.0 A 0.6 ; 0.7 Co-60 0.4 +/-1.6; 1.6 0.2 +/- 0.9 ; 0.9 Zn-65 -1.3 +/-2.9 ; 2.9 -0.3 + 1.8; 1.8 Nb/Zr-95 -1.8 +/- 1.2; 1.2 -0.6 + 0.8 ; 0.8 Cs-134 0.6 +/- 1.4 ; 1.4 0.7 + 0.9 ; 0.9 Cs-137 0.5 +/- 1.3 ; 1.3 0.5 +/- 0.8 ; 0.8 Ba/La-140 0.5 +/- 0.9 ; 0.9 -1.9 + 0.6 ; 0.6 111-15

ZION Table 9. Public Water Collection: Monthly composites of weekly collections ODCM- Gross Beta = 4; Mn-54 = 15; Fe-59 = 30; Co-58, Co-60 = 15; Zn-65, Zr/Nb-95 = 30; Required LLDs: Cs-134 = 15; Cs-137 = 18; Ba/La-140 = 15 pCi'L Units: pCi/L Sample Description and Concentration Z-14 (C) Kenosha Water Works 2004 Collection January February March Period Lab Code ZPW-396 ZPW-760 ZPW-1304 Gross Beta 2.1 +/- 1.3 ; 1.3 3.0+ 0.9; 1.0 1.7+/- 0.9 ;0.9 Mn-54 0.9+/-3.1 ;3.1 0.1 +/- 1.8 ; 1.8 2.3+/-3.5 ;3.6 Fe-59 0.8 +/- 4.5 ; 4.5 4.7+/-3.2 ;3.3 2.4+/-4.6 ;4.6 Co-58 -1.4+/-2.5 ;2.5 -0.3 +/- 1.5 ; 1.5 -0.4 + 3.2 ; 3.2 Co-60 4.4+/-3.5 ;3.6 0.2+/- 1.8; 1.8 -1.0 +/- 3.5; 3.5 Zn-65 1.6+/-4.8 ;4.9 2.3 44.7 ;4.7 -1.5 +/- 6.9 ; 6.9 Nb/Zr-95 -2.1 +/-2.8; 2.8 1.2+/-2.1; 2.1 -0.1 +/-3.6; 3.6 Cs-134 2.1+/-3.7 ;3.7 -0.6 + 2.3; 2.3 0.5+/-3.1 ;3.1 Cs-137 0.7+/-3.1 ;3.1 -0.9 +/- 2.2 ; 2.2 -1.1 +/- 2.7 ; 2.7 Ba/La-140 -4.5 +/- 4.1 ; 4.1 -1.7+/- 2.4; 2.4 -6.3 +/- 4.3; 4.4 2004 Collection April May June Period Lab Code ZPW-1905 ZPW-2772 ZPW-3455 Gross Beta 1.9+/- 0.9 ;0.9 2.3+/-0.9 ;1.0 1.9+0.9; 1.0 Mn-54 1.5 +/- 1.8 ; 1.8 -0.5 + 2.0 ; 2.0 -1.5 +/- 1.7; 1.7 Fe-59 -2.6 +/- 3.4; 3.4 2.4 +/-3.6 ;3.7 0.9+/- 3.2 ;3.2 Co-58 -1.8 +/- 1.9 ; 1.9 1.6+/- 1.6; 1.6 -1.9 + 1.9; 1.9 Co-60 0.2+/- 1.9; 1.9 1.4+/-2.0;2.0 1.6+/- 2.3; 2.3 Zn-65 -1.7 + 4.0; 4.0 0.4+3.8 ;3.8 -1.1 +/- 3.6 ; 3.6 NbfZr-95 0.1 +/-2.0; 2.0 -0.6+/-1.8; 1.8 -0.0 +/- 1.7; 1.7 Cs-134 -1.8+/- 2.3 ;2.4 0.2+/-2.3 ;2.3 -0.2 +/- 2.3 ; 2.3 Cs-137 -0.2 +/- 2.2 ; 2.2 0.9+2.4 ;2.4 0.6 +/- 2.2 ; 2.2 Ba/La-140 0.1 +/- 1.8; 1.8 0.4+/- 2.0; 2.0 0.4 +/- 2.3; 2.3 III - 16

ZION Table 9. Public Water Collection: Monthly composites of weekly collections ODCM- Gross Beta = 4; Mn-54 = 15; Fe-59 = 30; Co-58, Co-60 = 15; Zn-65, Zr/Nb-95 = 30; Required LLDs: Cs-134 = 15; Cs-137 = 18; Ba/La-140 = 15 pCi/L Units: pCi/L Sample Description and Concentration Z-14(C) Kenosha Water Works 2004 Collection July August September Period Lab Code ZPW-4439 ZPW-5088 ZPW-5874 Gross Beta 2.3 +/- 0.9 ; 1.0 2.240.9; 1.0 1.6+/-0.9 ;0.9 Mn-54 0.1 +/- 1.8 ; 1.8 0.443.1 ;3.1 -0.8+/-3.2 ;3.2 Fe-59 0.4 +/-3.4 ;3.4 -1.9+4.8 ;4.8 -2.2+/-6.1 ;6.1 Co-58 0.1 1.9; 1.9 1.142.7 ;2.7 -0.4+/-3.3 ;3.3 Co-60 -0.9+/- 1.7; 1.7 2.5+/-3.5 ;3.5 1.6+/-4.0 ;4.0 Zn-65 0.4+/-3.8 ;3.8 -3.2 +/- 4.4 4.4 -4.2 +/- 7.3 ; 7.3 Nb/Zr-95 0.7+/-1.9; 1.9 -1.7+/-2.8; 2.8 -1.3+/-3.8; 3.8 Cs-134 -0.1 +/- 1.7; 1.7 3.0+/-2.7; 2.8 0.3 +/-3.5;3.5 Cs-137 -2.6+/-2.1 ;2.1 1.0+/- 3.2 3.2 -0.2 +/- 3.0 ; 3.0 Ba/La-140 -1.3 +/- 2.2; 2.2 0.8 +/- 3.4; 3.4 1.1 +/- 4.7; 4.7 2004 Collection October November December Period Lab Code ZPW-6344 ZPW-7192 ZPW-7480 Gross Beta 1.9+/-0.8 ;0.9 0.7 + 0.8 ; 0.9 2.1+/-0.9 ;1.0 Mn-54 -2.4 +/- 1.9; 1.9 2.0+/- 2.1 ;2.1 1.1 +/- 1.8; 1.8 Fe-59 -2.0 + 3.6 ; 3.6 1.2I3.2 ;3.2 0.3 +/- 4.3 ; 4.3 Co-58 0.2 +/-1.5 ; 1.5 -1.3 +/-2.3 ;2.3 1.2+/- 2.0 ;2.0 Co-60 1.6+ 1.6; 1.6 0.8+/-1.8; 1.8 2.0+/- 1.9; 1.9 Zn-65 -2.6 +/- 3.6 ; 3.6 -1.3 +/- 5.4 ; 5.4 -1 1.1 +/-5.2 ; 5.5 Nb/Zr-95 -0.9 + 1.7; 1.7 -0.3 +/-2.0; 2.0 -1.0 +/-2.2; 2.2 Cs-134 1.9+ 1.7; 1.7 0.8 +/- 2.4 ; 2.4 -1.9+/- 2.6 ;2.6 Cs-137 -0.5+2.1 ;2.1 1.4+/- 2.3 ;2.3 0.7 +/- 2.3 ; 2.3 Ba/La-140 2.7+/- 1.8; 1.8 2.3 +/- 2.1 ; 2.1 1.1 +/- 1.6; 1.6 III - 17

ZION Table 9. Public Water Collection: Monthly composites of weekly collections ODCM- Gross Beta = 4; Mn-54 = 15; Fe-59 = 30; Co-58, Co-60 = 15; Zn-65, ZrfNb-95 = 30; Required LLDs: Cs-134 = 15; Cs-137 = 18; Ba/La-140 = 15 pCi/L Units: pCiL Sample Description and Concentration Z-15 Lake County Water Works 2004 Collection January February March Period Lab Code ZPW-397 ZPW-761 ZPW-1305 Gross Beta 2.8+/-0.9 ;1.0 1.8+/-0.9 ;0.9 3.5 1.0 ;1.1 Mn-54 -2.0 +/- 1.6 ; 1.6 1.7 + 2.7 ; 2.7 -1.7 3.4 ;3.5 Fe-59 -1.1+/- 3.0 ; 3.0 0.6 + 5.8 ; 5.8 -1.4+/-5.3 ;5.3 Co-58 0.3+/-1.5 ;1.5 1.7+/- 3.2; 3.2 2.0 3.4 ;3.4 Co-60 0.2+/- 1.6; 1.6 0.3+3.5 ;3.5 0.7+/-3.6 ;3.6 Zn-65 1.342.4 ;2.4 1.0+ 6.3; 6.3 -6.1 +/- 7.0; 7.0 Nb/Zr-95 0.1+/-1.7; 1.7 2.1 42.9; 2.9 -1.7 +/- 3.2; 3.2 Cs-134 -0.5+/-2.0 ;2.0 1.044.3 ;4.3 -2.5+/-3.7;3.7 Cs-137 -0.5+/-2.1 ;2.1 -0.3 4 2.7 ; 2.7 -0.6 + 3.7; 3.7 Ba/La-140 -0.2 +/- 1.9; 1.9 0.5 i 4.3; 4.3 -3.2 + 4.4; 4.4 2004 Collection April May June Period Lab Code ZPW-1906 ZPW-2773 ZPW-3456 Gross Beta 1.9+/-0.9 ;1.0 2.8 +/- 1.0 ; 1.1 0.4+/- 1.1 ;1.1 Mn-54 0.64 3.2 ;3.2 0.3 +/-2.4 ; 2.4 0.2 +/- 1.5 ; 1.5 Fe-59 -1.3+/-5.2;5.2 -3.6 X 4.9; 5.0 -1.8 + 2.5; 2.5 Co-58 1.8+/-2.9;2.9 -3.1 +/-2.6 ; 2.6 0.5+1.1 ; 1.1 Co-60 5.1 +/-4.1 ;4.2 0.2+/-2.9 ;2.9 -1.1 +/- 1.4 ; 1.4 Zn-65 -7.4 4 6.5 ; 6.6 1.2 +/-4.7 ;4.7 0.4+/- 2.7 ;2.7 Nb/Zr-95 0.4 +/-3.6; 3.6 0.1 +/-3.0; 3.0 -2.4 +/- 1.3; 1.4 Cs-134 -1.0+/- 3.7 ;3.7 0.7+/- 3.1 ;3.1 1.4+/-1.3; 1.3 Cs-137 1.4 +/-3.7 ;3.7 1.8+/-2.9 ;2.9 0.3 +/- 1.3 ; 1.3 Ba/La-140 -5.9+ 5.5; 5.6 -1.1 + 2.5; 2.5 0.1 + 1.6; 1.6 III - 18

ZION Table 9. Public Water Collection: Monthly composites of weekly collections ODCM- Gross Beta = 4; Mn-54 = 15; Fe-59 = 30; Co-58, Co-60 = 15; Zn-65, Zr/Nb-95 = 30; Required LLDs: Cs-134 = 15; Cs-137 = 18; Ba/La-140 = 15 pCi/L Units: pCi/L Sample Description and Concentration Z-15 Lake Countv Water Works 2004 Collection July August September Period Lab Code ZPW-4440 ZPW-5089 ZPW-5875,6 Gross Beta 1.6*0.9 ;0.9 1.6*0.9 ;0.9 2.0 4 0.6 ; 0.6 Mn-54 -0.3 +/- 3.2; 3.2 2.2* 1.7; 1.7 2.0+2.0;2.1 Fe-59 -1.7 + 6.2 ; 6.2 -0.1 +/- 3.5 ; 3.5 -1.9+ 2.7 ;2.7 Co-58 -1.5+/-2.8 ;2.8 -0.3*1.9;1.9 0.1 + 1.9; 1.9 Co-60 -1.3+/-3.4 ;3.4 -0.2 +/- 1.9; 1.9 -0.1

• 1.9; 1.9 Zn-65 2.7 +/- 6.4 ; 6.4 -3.6+/-4.3 ;4.4 3.2 +/-3.7 ;3.7 Nb/Zr-95 -0.4 + 2.9; 2.9 -2.1*1.8; 1.8 0.8+ 1.8; 1.8 Cs-134 3.9 + 3.8 ; 3.8 0.5

• 2.2 ; 2.2 1.2+/-2.5 ;2.5 Cs-137 0.6 + 3.0 ; 3.0 -1.2+/-2.0;2.0 0.8

• 2.0 ; 2.0 Ba/La-140 -0.4 + 4.1 ; 4.1 1.9+/- 2.2; 2.2 1.0

• 2.1 ; 2.1 2004 Collection October November December Period Lab Code ZPW-6345 ZPW-7193 ZPW-7481 Gross Beta 1.8*0.9 ;0.9 1.5 +/- 0.9 ;0.9 2.0* 0.9; 1.0 Mn-54 0.5

• 1.7 ; 1.7 0.1* 2.0; 2.0 -1.0

• 3.4; 3.4 Fe-59 2.7*3.9;3.9 -8.5

• 4.6 ; 4.8 2.9

• 5.2 ; 5.2 Co-58 0.6

• 1.8 ; 1.8 2.1* 2.0 ; 2.0 1.3*3.5 ;3.5 Co-60 0.2

• 1.8 ; 1.8 0.1 *2.3 ; 2.3 2.2* 3.1 ;3.2 Zn-65 5.9* 3.2 ;3.3 -5.5+/-5.0;5.1 2.7

• 6.2 ; 6.2 Nb/Zr-95 -2.2 42.2; 2.3 1.2 *2.0; 2.0 -3.6 *3.6; 3.6 Cs-134 -2.1*2.2 ;2.2 2.5 *2.1 ;2.1 -1.2*3.3 ;3.3 Cs-137 -1.6

• 2.5; 2.5 0.7*2.1 ;2.1 -0.5*3.1 ;3.1 Ba/La-140 -1.4

• 2.0; 2.1 1.0* 1.6; 1.6 -4.8 + 4.4; 4.5 III - 19

ZION Table 9. Public Water Collection: Monthly composites of weekly collections ODCM- Gross Beta = 4; Mn-54 = 15; Fe-59 = 30; Co-58, Co-60 = 15; Zn-65, Zr/Nb-95 = 30; Required LLDs: Cs-134 = 15; Cs-137 = 18; Ba/La-140 = 15 pCi/L Units: pCi/L Sample Description and Concentration Z-16 Waukegan Water Works 2004 Collection January February March Period Lab Code ZPW-398 ZPW-762 ZPW-1306 Gross Beta 2.7+/-0.9; 1.0 3.3 + 1.0 ; 1.1 3.7 + 1.0 ; 1.1 Mn-54 -0.4 +/- 1.7; 1.7 -1.0+ 1.9; 1.9 0.2+/- 2.9 ;2.9 Fe-59 -4.1 +/- 2.8 ; 2.8 0.5+/-3.3 ;3.3 2.4 +/- 4.9 ; 4.9 Co-58 1.3 +/- 1.4 ; 1.4 -2.0 +/- 2.0 ; 2.0 0.5 +/- 2.8 ; 2.8 Co-60 -0.4 +/- 1.7; 1.7 0.6 + 2.2 ; 2.2 0.5+/-2.4 ;2.4 Zn-65 -0.2 +/- 3.5 ; 3.5 3.7+/-3.3 ;3.4 -0.8 + 5.6 ; 5.6 Nb/Zr-95 0.11.8; 1.8 -0.8 +/- 1.9; 1.9 -0.1 +/-2.5; 2.5 Cs-134 0.3+/- 1.6; 1.6 -0.7 +/- 1.7 ; 1.7 1.3+/-3.3 ;3.3 Cs-137 -0.7 +/- 1.6 ; 1.6 -0.8 + 1.8; 1.8 -1.6+/- 3.1 ;3.1 BaILa-140 -2.6 +/- 2.1 ; 2.2 -1.6+/- 1.6; 1.7 1.3 +/- 3.1 ; 3.1 2004 Collection April May June Period Lab Code ZPW-1907 ZPW-2774 ZPWV-3457 Gross Beta 2.7+/-0.9; 1.0 2.7+/-0.9 ;1.0 3.3 +/- 1.1; 1.2 Mn-54 -0.1 +/- 1.7; 1.7 -1.0 +/-1.6; 1.6 -0.4 +/- 1.7 ; 1.7 Fe-59 2.4+/- 3.7 ;3.7 0.4+/- 3.3 ;3.3 4.2+/-3.6;3.6 Co-58 1.5+/-2.0;2.0 -0.4 +/- 1.7; 1.7 -0. 1 +/- 1.2 ; 1.2 Co-60 -0.2+ 2.1 ;2.1 -0.6+/- 1.1 ; 1.1 0.5 +/- 1.7 ; 1.7 Zn-65 -1.94 4.3 ;4.3 1.0+/-4.5 ;4.5 0.7 +/- 2.6 ; 2.6 Nb/Zr-95 -0.2+/-2.1; 2.1 1.0+/- 1.6; 1.6 -2.8 +/-2.0; 2.0 Cs-134 1.0+/- 2.3 ;2.3 -0.6 +/-2.2 ; 2.2 0.2 +/- 2.0 ; 2.0 Cs-137 -1.74 2.0 ;2.0 1.1 +/- 1.9 ; 1.9 -0.8 +/- 2.3 ; 2.3 Ba/La-140 -0.2 +/- 2.6; 2.6 -0.6 +/- 2.2; 2.2 2.2:+/- 1.6; 1.6 III -20

ZION Table 9. Public Water Collection: Monthly composites of weekly collections ODCM- Gross Beta = 4; Mn-54 = 15; Fe-59 = 30; Co-58, Co-60 = 15; Zn-65, Zr/Nb-95 = 30; Required LLDs: Cs-134 = 15; Cs-137 = 18; BatLa-140 =15 pCi/L Units: pCi/L Sample Description and Concentration Z-16 Waukegan Water Works 2004 Collection July August September Period Lab Code ZPW-4441 ZPW-5090 ZPW-5877 Gross Beta 2.5 +/- 0.9 ; 0.9 2.6* 1.0; 1.0 1.8*0.9 ;1.0 Mn-54 -0.4 + 2.5 ; 2.5 -1.1

• 2.1 2.1 0.8 + 1.9 ; 1.9 Fe-59 2.4 + 4.8 ; 4.8 1.2 +/- 2.8; 2.8 -0.3

• 4.4 ; 4.4 Co-58 0.3 + 2.8 ; 2.8 0.6* 1.6; 1.6 0.5 + 1.8 ; 1.8 Co-60 -0.5+3.4 ;3.4 -0.1 +/- 1.8; 1.8 -1.2* 2.1 ;2.1 Zn-65 4.2+ 5.3; 5.3 -1.8*3.8 ;3.8 -1.5 + 4.6; 4.6 Nb/Zr-95 1.8 *2.6; 2.6 -2.4*1.7; 1.8 0.3 *2.0; 2.0 Cs-134 -1.7 +/- 2.9; 2.9 -0.2*2.1 ;2.1 0.9

• 2.4 ; 2.4 Cs-137 0.9 +/- 2.9 ; 2.9 -1.0*2.3 ;2.3 0.2

• 2.5 ; 2.5 Ba/La-140 -3.3 + 3.1 ; 3.1 3.8 + 2.1; 2.2 -1.4* 1.8; 1.8 2004 Collection October November December Period Lab Code ZPW-6346 ZPW-7194 a ZPW-7482 Gross Beta 0.9

• 0.8 ; 0.8 2.1

• 0.9 ; 1.0 2.2+0.9; 1.0 Mn-54 -2.5

• 2.6 ; 2.6 -0.7

• 2.3 ; 2.3 0.7+ 2.3; 2.3 Fe-59 0.443.8 ;3.8 0.4 + 4.5 ; 4.5 1.7* 3.5 ;3.6 Co-58 1.6* 3.1 ;3.1 1.6* 2.3; 2.4 -1.3

• 1.9; 1.9 Co-60 -0.2* 3.5; 3.5 0.3

• 2.5 ; 2.5 1.4 +/- 1.9 ; 1.9 Zn-65 2.6

• 6.0 ; 6.0 -1.7

• 4.3; 4.3 -2.8 + 4.5; 4.5 Nb/Zr-95 -1.1 42.8; 2.8 1.9 *2.0; 2.0 -0.8 *2.2; 2.2 Cs-134 1.3*3.3 ;3.3 -0.1

• 2.6; 2.6 -1.0 + 2.4; 2.5 Cs-137 0.4*3.0;3.0 -0.6

• 2.2 ; 2.2 -0.5

• 2.4 ; 2.4 Ba/La-140 2.8* 2.6; 2.6 -7.1 +/- 2.5; 2.7 -1.5

• 2.2; 2.2

'Results reflect 3 collections for month; sample not available on 11-24-04 due to maintenance wvork.

III -21

ZION Table 9. Public Water Collection: Monthly composites of %veeklycollections ODCM- Gross Beta = 4; Mn-54 = 15; Fe-59 = 30; Co-58, Co-60 = 15; Zn-65, Zr/Nb-95 = 30; Required LLDs: Cs-134 =15; Cs-137 = 18; Ba/La-140 = 15 pCi/L Units: pCi/L Sample Description and Concentration Z-18 (C) Lake Forest Water Works 2004 Collection January February March Period Lab Code ZPW-399 ZPW-763 ZPW-1307 Gross Beta 2.2+/-0.9 ;0.9 2.0 +/- 0.9 ; 0.9 2.5+0.9 ;1.0 Mn-54 -0.7 +/- 2.9 ; 2.9 0.9+/-4.2 ;4.2 2.4 +/- 2.9 ; 2.9 Fe-59 -2.1 +/- 5.9 ; 5.9 -1.9+/-6.2 ;6.2 3.8+/-5.0;5.1 Co-58 1.1+/- 3.2 ; 3.2 0.4 +/-3.1 ;3.1 1.3+/-2.8 ;2.8 Co-60 -0.3 +/- 3.0 ; 3.0 -1.6 +/-3.5; 3.5 2.7+/- 3.0 ;3.0 Zn-65 -1.4+/-6.5 ;6.5 3.4+/-7.2 ;7.2 -0.5+/-5.7 ;5.7 Nb/Zr-95 1.1 +/-2.9; 2.9 -1.6+/-3.2; 3.2 0.4 +/-3.0; 3.0 Cs-134 4.2+/-3.2 ;3.3 -1.4 +/- 3.5; 3.5 0.8+/-3.2 ;3.2 Cs-137 0.6 +/- 2.9 ; 2.9 1.5+/-3.7;3.7 0.1 +/- 2.8 ; 2.8 Ba/La-140 3.0 + 3.1 ; 3.1 1.2+/- 3.0; 3.0 -0.1 + 3.3 ; 3.3 2004 Collection April May June Period Lab Code ZPW-1908 ZPW-2775a ZPW-3458 Gross Beta 2.6+/-0.9; 1.0 1.9+ 0.9 ;0.9 1.8+/- 1.0; 1.0 Mn-54 -2.1 + 2.3; 2.3 1.342.4 ;2.4 0.3+ 1.8; 1.8 Fe-59 -2.9+/- 3.3 ;3.4 -3.5+ 3.9 ;3.9 -0.8+/-3.5 ;3.5 Co-58 0.5 +/- 2.0 ;2.0 -0.6 + 1.7; 1.7 -0.4+/-2.1 ;2.1 Co-60 0.2 +/- 2.2 ; 2.2 0.4+ 2.1 ;2.1 -0.9 + 2.0 ; 2.0 Zn-65 -3.7+/-4.7 ;4.7 0.5+/-4.5 ;4.5 -1.3 +/-4.2 ;4.2 NbfZr-95 0.4+/- 1.7; 1.7 -1.4+/-2.1; 2.1 -1.0+/- 1.8; 1.8 Cs-134 -0.4 +/- 2.0 ;2.0 0.9+/-2.2 ;2.2 1.5+ 1.9; 1.9 Cs-137 1.0+/- 2.4 ;2.5 -0.1 +/- 2.2 ; 2.2 -0.6 +/-1.9; 1.9 Ba/La-140 1.4+/- 2.0; 2.0 -1.8+ 3.0; 3.0 -4.8 + 2.6; 2.7

' Results reflect 3 samples for month; water unavailable due to construction.

III -22

ZION Table 9. Public Water Collection: Monthly composites of weekly collections ODCM- Gross Beta =4; Mn-54 = 15; Fe-59 = 30; Co-58, Co-60 = 15; Zn-65, Zr/Nb-95 = 30; Required LLDs: Cs-134 = 15; Cs-137 = 18; Ba/La-140 = 15 pCi/L Units: pCi/L Sample Description and Concentration Z-1 8 (C) Lake Forest Water Works 2004 Collection July August September Period Lab Code ZPW-4442 ZPW-5091 ZPW-5878' Gross Beta 2.3+/-0.9 ;1.0 2.3 +/- 0.9 ; 0.9 2.5 +/-0.9; 1.0 Mn-54 -1.4 +/- 1.9 ;1.9 0.9+/- 2.7; 2.7 1.8+/-3.5 ;3.5 Fe-59 -3.9 4 3.5 ;3.5 -3.744.4 ;4.4 -0.8 +/- 7.0 ; 7.0 Co-58 0.2 +/- 1.5; 1.5 4.7+/-3.1 ;3.2 -3.9+/-3.1 ;3.2 Co-60 -1.0 +/- 1.8; 1.8 0.743.0;3.0 -1.1 +/- 3.8 ; 3.8 Zn-65 -0.8 +/- 3.6; 3.6 0.4 +/- 4.3 ; 4.3 2.1+/-6.1 ;6.1 Nb/Zr-95 -0.3 +/-1.9; 1.9 0.543.0; 3.0 0.5 +/-3.0; 3.0 Cs-134 -0.942.1 ;2.1 -0.6 +/- 3.3; 3.3 -2.5 +/- 4.7; 4.7 Cs-137 0.8 +/- 1.9; 1.9 2.3+/-3.0;3.1 -0.2+/-3.1 ;3.1 Ba!La-140 -0.8+/- 1.9; 1.9 0.8 + 3.4; 3.4 4.1 +/- 4.1 ; 4.1 2004 Collection October November December Period Lab Code ZPW-6347 ZPW-7195 ZPW-7483 Gross Beta 1.6+/-0.9 ;0.9 2.3+/-0.9 ;1.0 1.9 +/- 0.9 ;0.9 Mn-54 0.6 + 2.2 ; 2.2 2.4+/- 3.1 ;3.2 -0.2 + 1.7; 1.7 Fe-59 -0.6 + 3.5 ; 3.5 -5.0+ 6.1 ;6.1 1.5+/-3.8;3.8 Co-58 -0.4 +/-1.8; 1.8 -1.2 + 3.0; 3.0 0.8 +/-1.6 ; 1.6 Co-60 0.6+/- 1.9; 1.9 4.1+/- 2.6 ; 2.6 0.1+/-2.1 ;2.1 Zn-65 -4.2+/-4.1 ;4.1 -1.4+/- 6.9 ;6.9 -0.9 4 4.6 ; 4.6 Nb/Zr-95 -1.1 +/- 1.8; 1.8 2.1 +/-3.2; 3.2 -0.4 + 1.9; 1.9 Cs-134 0.4 +/- 1.8 ; 1.8 -0.9 + 3.6; 3.6 -0.5 +/- 2.3 ; 2.3 Cs-137 0.2+/- 1.9; 1.9 0.1+/- 2.8 ; 2.8 0.2 +/- 2.3 ; 2.3 Ba/La-140 -2.7 +/- 2.2; 2.2 7.9+ 4.2; 4.4 -1.1+/- 1.9;2.0

'Results reflect 3 samples for month; water unavailable due to construction.

III -23

ZION Table 9. Public Water Collection: Quarterly composites of weekly collections Required LLD: 200 pCiIL Units: pCi/L 2004 Sample Description and Concentration Collection Period Lab Code Tritium Z-14 (C) Kenosba Water Works 1st Quarter ZPWv- 1286 91 +/- 80 ;81 2nd Quarter ZPw- 3551 110+/- 85;86 3rd Quarter ZPw- 5792 127+/- 89;90 4th Quarter ZPW- 7680 73+/- 88;89 Z-15 Lake County Water Vorks Ist Quarter ZPW- 1287 136+/- 82 ;84 2nd Quarter ZPW- 3552 834 83 ;84 3rd Quarter ZPW- 5793 64+ 86;86 4th Quarter ZPW- 7681 70+ 88 ;89 Z-16 Waukezan Water Works 1st Quarter ZPW- 1288 70 4 79 ; 80 2nd Quarter ZPW- 3553 27+/- 81 ;81 3rd Quarter ZPW- 5794 126+/- 89 ;90 4th Quarter ZPW - 7682 53+/- 87;88 Z-1 8 (C) Lake Forest Water Works 1st Quarter ZP'v- 1289 80+ 79 ;80 2nd Quarter ZP'v- 3554 56+ 82 ;82 3rd Quarter ZPW- 5795 137+/- 89 ;91 4th Quarter ZPW - 7683 53+/- 87 ;88 III -24

ZION 5.0 NEAREST RESIDENCES CENSUS E-25

ZION NEAREST RESIDENCE CENSUS, 2004 Nearest resident of the Zion Station within a 6.2 mile radius.

Sector Direction Distance A N 2.5 miles J S None K SSW 1.9 miles L SW 1.1 miles M WSW 1.0 miles N W 1.1 miles p WNW 1.0 miles Q NW 1.0 miles R NNW 1.3 miles Census conducted by J. Rieter on August 30, 2004 III-26

ZION 6.0 TLD DATA*

• TLD Data provided by Exelon Nuclear.

m-27

Exelon Nuclear Environmental Site Report for Zion Gamma Radiation Measured In mR by TLDs Site Description Quarter 1 Quarter 2 Quarter 3 Quarter 4 2004 2004 2004 2004 I. INDICATOR LOCATIONS

a. Air Samplers Z-01-1 ONSITE NO. 1 18.0 20.0 16.0 21.0 Z-01-2 ONSITE NO. 1 17.0 21.0 15.0 21.0 Z-02-1 ONSITE NO. 2 14.0 19.0 13.0 20.0 Z-02-2 ONSITE NO. 2 14.0 17.0 13.0 20.0 Z-03-1 ONSITE NO. 3 15.0 18.0 14.0 20.0 Z-03-2 ONSITE NO. 3 14.0 18.0 14.0 21.0 Air Sampler Mean +/- S. D. 15.3 +/-1.8 18.8 +/-1.5 14.2 +/-1.2 20.5 +/-0.5 Annual Air Sampler Mean +/- S.D. 17.2 +/-2.9

b. Inner Ring (100 Series)

Z-1 01-1 17.0 18.0 14.0 20.0 Z-101-2 18.0 18.0 14.0 21.0 Z-102-1 16.0 19.0 17.0 26.0 Z-102-2 16.0 22.0 15.0 24.0 Z-1 03-1 16.0 22.0 15.0 21.0 Z-1 03-2 15.0 19.0 15.0 21.0 Z-104-1 15.0 18.0 14.0 22.0 Z-1 04-2 15.0 21.0 16.0 22.0 Z-1 05-1 18.0 20.0 14.0 21.0 Z-105-2 15.0 21.0 16.0 22.0 Z-106-1 15.0 20.0 13.0 23.0 Z-1 06-2 17.0 18.0 13.0 22.0 Z-1 07-1 16.0 18.0 16.0 25.0 Z-1 07-2 15.0 21.0 14.0 22.0 Z-1 08-1 15.0 20.0 16.0 21.0 Z-1 08-2 16.0 20.0 14.0 21.0 Z-110-1 15.0 22.0 14.0 22.0 Z-110-2 16.0 20.0 14.0 21.0 Z-111-1 15.0 19.0 15.0 24.0 Z-1 11-2 15.0 21.0 16.0 24.0 Z-112-1 17.0 23.0 18.0 26.0 Z-1 12-2 16.0 19.0 16.0 25.0 Z-1 13-1 15.0 20.0 17.0 24.0 Z-1 13-2 15.0 21.0 14.0 21.0 Z-1 14-1 15.0 22.0 17.0 25.0 Z-1 14-2 16.0 20.0 16.0 25.0 Z-1 15-1 18.0 22.0 18.0 26.0 Z-115-2 17.0 20.0 16.0 26.0 Inner Ring Mean +/- S.D. 15.9 +/-1.0 20.1 +/-1.5 15.3 +/-1.4 23.0 +/-2.0 Annual Inner Ring Mean +/- S.D. 18.6 +/-3.5 INDICATOR LOCATION MEAN +/- S.D. 15.8 +/-1.2 19.9 +/-1.5 15.1 +/-1.4 22.5 +/-2.0 Annual INDICATOR MEAN +/- S.D. 18.3 +/-3.4 III-28

ZION 7.0 GRAPHS OF DATA TRENDS III-29

Air Particulates - Gross Beta Z-01 Onsite No. 1, Southside 10.0 8.0 E 6.0 CM 9

CO 4.0 2.0 0.0 01-01-00 12-31-00 12-31-01 12-31-02 12-31-03 12-30-04 Figure 1. Continuous collection with weekly exchange of particulate filter.

Z-02 Onsite No. 2, Westside 10.0 -

8.0 6.0 C.

C) 4.0 2.0 0.0 01-01-00 12-31-00 12-31-01 12-31-02 12-31-03 12-30-04 Figure 2. Continuous collection with weekly exchange of particulate filter.

III-30

Air Particulates - Gross Beta Z-03 Onsite No. 3, Northside 10.0 -

8.0 -

.g 6.0-U a.

9 o

ilA Nt 4.0 2.0-J 'W 0.0 II 01-01-00 12-31-00 12-31-01 12-31-02 12-31-03 12-30-04 Figure 3. Continuous collection with weekly exchange of particulate filter.

III-31

Public Water-Gross Beta Z-14 Kenosha Water Works 10.0 8.0 6.0 G

C-,

4.0 2.0 0.0 -

01-01-00 12-31-00 12-31-01 12-31-02 12-31-03 12-30-04 Figure 4. Monthly composite of weekly collection.

Z-15 Lake County Water Works 10.0 8.0 6.0

-J C-,

4.0 2.0 0.0 1-01-01-00 12-31-00 12-31-01 12-31-02 12-31-03 12-30-04 Figure 5. Monthly composite of weekly collection.

IHI-32

Public Water-Gross Beta Z-1 6 Waukegan Water Works 10.0 8.0 6.0

-J U

CL.

4.0 2.0 01-01-00 12-31-00 12-31-01 12-31-02 12-31-03 12-30-04 Figure 6. Monthly composite of weekly collection.

Z-1 8 Lake Forest Water Works 10,-

8+

6+

a-4 U

4-2-

cO- i o i 01-01-00 12-31-00 12-31-01 12-31-02 12-31-03 12-30-04 Figure 7. Monthly composite of weekly collection.

IH-33

Public Water-Tritium Z-14 (C) Kenosha Water Works 400 -

300 -

200 o 100-r.

0 -

-100 -

-200 4-01-01-00 12-31-00 12-31-01 12-31-02 12-31-03 12-30-04 Figure 8. Quarterly composites of weekly collections.

Z-15 Lake County Water Works 500 400 300 5 200 100 0

-100 I-_

01-01-00 12-31-00 12-31-01 12-31-02 12-31-03 12-30-04 Figure 9. Quarterly composites of weekly collections.

III-34

Public Water-Tritium Z-16 Waukegan Water Works 500 -

400 -

300 -

-j

<,> 200 -

100 0

-1 00 .

01-01-00 12-31-00 12-31-01 12-31-02 12-31-03 12-30-04 Figure 10. Quarterly composites of weekly collections.

Z-1 8 (C) Lake Forest Water Works 400 -

300 -

200 -

-j

) 100-0

-100 -

-200 01-01-00 12-31-00 12-31-01 12-31-02 12-31-03 12-30-04 Figure 11. Quarterly composites of weekly collections.

III-35

ZION APPENDIX IV INTERLABORATORY COMPARISON PROGRAM RESULTS IV-1

- Environmental, Inc.

Mdw est Laboratory an Allghery Technlogies Co.

7058Landwetr Rod *Nothbrock IL a00ta (84 7)54 0700 t(847) 584-4517 APPENDIX IV INTERLABORATORY COMPARISON PROGRAM RESULTS NOTE: Environmental Inc., Midwest Laboratory participates in intercomparison studies administered by Environmental Resources Associates, and serves as a replacement for studies conducted previously by the U.S. EPA Environmental Monitoring Systems Laboratory, Las Vegas, Nevada. Results are reported in Appendix A. TLD Intercomparison results, in-house spikes, blanks, duplicates and mixed analyte performance evaluation program results are also reported. Appendix A Is updated four times a year; the complete Appendix is included in March, June, September and December monthly progress reports only.

January through December, 2004 IV-2

Appendix IV Interlaboratory Comparison Program Results Environmental, Inc., Midwest Laboratory, formerly Teledyne Brown Engineering Environmental Services Midwest Laboratory has participated in interlaboratory comparison (crosscheck) programs since the formulation of it's quality control program in December 1971. These programs are operated by agencies which supply environmental type samples containing concentrations of radionuclides known to the issuing agency but not to participant laboratories. The purpose of such a program is to provide an independent check on a laboratory's analytical procedures and to alert it of any possible problems.

Participant laboratories measure the concentration of specified radionuclides and report them to the issuing agency. Several months later, the agency reports the known values to the participant laboratories and specifies control limits. Results consistently higher or lower than the known values or outside the control limits indicate a need to check the instruments or procedures used.

Results in Table IV-1 were obtained through participation in the environmental sample crosscheck program administered by Environmental Resources Associates, serving as a replacement for studies conducted previously by the U.S. EPA Environmental Monitoring Systems Laboratory, Las Vegas, Nevada.

The results in Table IV-2 list results for thermoluminescent dosimeters (TLDs), via International Intercomparison of Environmental Dosimeters, when available, and internal laboratory testing.

Table IV-3 lists results of the analyses on in-house 'spiked' samples for the past twelve months. All samples are prepared using NIST traceable sources. Data for previous years available upon request.

Table IV-4 lists results of the analyses on in-house 'blank" samples for the past twelve months. Data for previous years available upon request.

Table IV-5 list results of the in-house "duplicate" program for the past twelve months. Acceptance is based on the difference of the results being less than the sum of the errors. Data for previous years available upon request.

The results in Table IV-6 were obtained through participation in the Mixed Analyte Performance Evaluation Program.

The results in Table IV-7 were obtained through participation in the Environmental Measurement Laboratory Quality Assessment Program.

Attachment A lists acceptance criteria for 'spiked' samples.

Out-of-limit results are explained directly below the result.

IV-3

Attachment A ACCEPTANCE CRITERIA FOR "SPIKED" SAMPLES LABORATORY PRECISION: ONE STANDARD DEVIATION VALUES FOR VARIOUS ANALYSES2 One standard deviation Analysis Level for single determination Gamma Emitters 5 to 100 pCi/liter or kg 5.0 pCiAiter

> 100 pCi/liter or kg 5% of known value Strontium_89b 5 to 50 pCi/liter or kg 5.0 pCi/liter

> 50 pCi/liter or kg 10% of known value Strontium_90b 2 to 30 pCi/liter or kg 5.0 pCi/liter

> 30 pCi/liter or kg 10% of known value Potassium-40 20.1 gAiter or kg 5% of known value Gross alpha *20 pCi/liter 5.0 pCi/liter

> 20 pCi/liter 25% of known value Gross beta *100 pCi/liter 5.0 pCi/liter

> 100 pCi/liter 5% of known value Tritium <4,000 pCi/liter l10 = (pCifiter) =

169.85 x (known) 0 033

> 4,000 pCi/liter 10% of known value Radium-226,-228 20.1 pCi/liter 15% of known value Plutonium 20.1 pCiAiter, gram, or sample 10% of known value lodine-131, **55 pCi/liter 6.0 pCi/liter Iodine-129b > 55 pCi/liter 10% of known value Uranium-238, *35 pCi/liter 6.0 pCi/liter Nickel-63b > 35 pCi/liter 15% of known value Technetium-99b Iron-55b 50 to 100 pCi/liter 10 pCi/liter

> 100 pCi/liter 10% of known value Othersb 20% of known value

' From EPA publication, 'Environmental Radioactivity Laboratory Intercomparison Studies Program, Fiscal Year, 1981-1982, EPA-60014-81-004.

b Laboratory limit.

IV-4

TABLE IV-1. Interlaboratory Comparison Crosscheck program, Environmental Resource Associates (ERA)a.

Concentration (pCi/L)

Lab Code Date Analysis Laboratory ERA Control Resultb Result' Umits I STW-1005 02/17/04 Sr-89 36.5 +/- 6.5 44.9 +/- 4.5 36.2 - 53.6 STW-1005 02/17/04 Sr-90 13.4 +/- 0.8 11.6 +/- 1.2 2.9 - 20.3 STW-1006 02/17/04 Ba-1 33 60.9 +/- 2.8 63.2 +/- 6.3 52.3 - 74.1 STW-1006 02/17/04 Co-60 95.2 +/- 1.5 96.4 +/- 9.6 87.7 - 105.0 STW-1006 02/17/04 Cs-1 34 71.2 +/- 5.4 75.8 +/- 7.6 67.1 - 84.5 STW-1006 02/17/04 Cs-1 37 157.0 +/- 6.5 155.0 +/- 15.5 142.0 - 168.0 STW-1006 02/17/04 Zn-65 103.0 +/- 1.1 102.0 +/- 10.2 84.4 - 120.0 STW-1007 02/17/04 Gr. Alpha 15.6 +/- 1.2 16.6 +/- 1.7 7.9 - 25.3 STW-1007 02/17/04 Gr. Beta 46.3 +/- 4.4 41.5 +/- 4.2 32.8 - 50.2 STW-1008 02/17/04 Ra-226 8.7 +/- 0.2 9.3 +/- 0.0 6.9 - 11.7 STW-1008 02/17/04 Ra-228 16.6 +/- 0.4 18.2 +/- 1.8 10.3 - 26.1 STW-1008 02/17/04 Uranium 34.2 +/- 0.8 33.0 +/- 3.3 27.8 - 38.2 STW-1 015 05/18/04 Sr-89 39.7 +/- 3.3 45.9 +/- 5.0 37.2 - 54.6 STW-1015 05/18/04 Sr-90 12.4 +/- 0.9 11.6 +/-5.0 2.9 - 20.3 STW-1 016 05/18/04 Ba-1 33 96.9 +/- 2.4 101.0 +/- 10.1 83.5 - 118.0 STW-1016 05/18/04 Co-60 39.9 +/- 0.5 41.6 +/- 5.0 32.9 - 50.3 STW-1016 05/18/04 Cs-134 48.8 +/- 0.8 50.5 +/- 5.0 41.8 - 59.2 STW-1016 05/18/04 Cs-137 82.6 +/- 2.3 82.5 +/- 5.0 73.8 - 91.2 STW-1016 05/18/04 Zn-65 77.5 +/- 1.5 75.2 +/- 7.5 62.2 - 88.2 STW-1017 05/18/04 Gr. Alpha 32.4 +/- 2.1 38.8 +/- 9.7 22.0 - 55.6 STW-1017 05/18/04 Gr. Beta 63.4 +/- 3.5 59.6 +/- 10.0 42.3 - 76.9 STW-1018 05/18/04 1-131 25.2 +/- 0.4 25.1 +/- 3.0 19.9 - 30.3 STW-1019 05/18/04 Ra-226 16.0 +/- 1.1 17.3 +/- 2.6 12.8 - 21.8 STW-1019 05/18/04 Ra-228 12.6 +/- 0.9 10.3 +/- 2.6 5.8 - 14.8 STW-1019 05/18/04 Uranium 13.0 +/- 0.0 12.7 +/- 3.0 7.5 - 17.9 STW-1020 05/18/04 H-3 32043 +/- 166 30900 +/- 3090 25600 -36200 STW-1028 08/17/04 Sr-89 16.1 +/-1.9 20.0 +/- 2.0 11.3 - 28.7 STW-1028 08/17/04 Sr-90 13.4 +/- 0.1 13.6 +/- 1.4 4.9 - 22.3 STW-1029 08/17/04 Ba-1 33 30.2 +/- 3.9 32.1 +/- 3.2 23.4 - 40.8 STW-1029 08/17/04 Co-60 24.9 +/- 1.9 24.0 +/- 2.4 15.3 - 32.7 STW-1029 08/17/04 Cs-1 34 21.4 +/- 3.4 21.6 +/-2.2 12.9 - 30.3 STW-1029 08/17/04 Cs-1 37 205.6 +/- 4.3 193.0 +/- 19.3 176.0 - 210.0 STW-1029 08/17/04 Zn-65 145.5 +/- 3.0 143.0 +/- 14.3 118.0 - 168.0 STW-1030 08/17/04 Gr. Alpha 47.7 +/- 9.1 57.0 +/- 5.7 32.3 - 81.7 STW-1030 08/17/04 Gr. Beta 28.1 +/-2.5 20.0 +/- 2.0 11.3 -28.7 STW-1030 08/17/04 Gr. Beta 28.1 +/-2.5 20.0 +/- 2.0 11.3 -28.7 STW-1031 08/17/04 Ra-226 6.9 +/- 0.5 6.3 +/- 0.6 4.6 - 7.9 STW-1031 08/17/04 Ra-228 13.1 +/-1.4 14.7 +/- 1.5 8.3 - 21.1 STW-1 031 08/17/04 Uranium 6.0 +/- 0.1 6.2 +/- 0.6 1.0 - 11.4 IV1-1

TABLE IV-1. Interlaboratory Comparison Crosscheck program, Environmental Resource Associates (ERA)".

Concentration (pCiIL)

Lab Code Date Analysis Laboratory ERA Control Resultb Result' Limits STW-1 037 11/15/04 Sr-89 42.2 +/-l3.5 45.7 +/- 5.0 37.0 - 51.5 STW-1037 11/15/04 Sr-90 37.3 + 1.3 36.6 +/- 5.0 27.9 - 45.3 STW-1038 11/15/04 Ba-133 75.5 +/- 0.8 78.4 +/- 7.8 64.8 - 92.0 STW-1 038 11/15/04 Co-60 12.2 +/-0.7 11.7 +/- 5.0 3.0 -20.4 STW-1 038 11/15/04 Cs-1 34 43.6 +/- 0.5 42.9 +/- 5.0 34.2 - 51.6 STW-1 038 11/15/04 Cs-1 37 59.5 +/- 2.9 60.1 +/- 5.0 51.4 - 68.8 STW-1 038 11/15/04 Zn-65 50.7 +/- 3.2 50.9 +/- 5.1 42.1 - 59.7 STW-1 039 11/15/04 Gr. Alpha 23.9 +/- 2.2 31.7 +/- 7.9 18.0 - 45.4 STW-1039 11/15104 Gr. Beta 35.8 +/- 1.3 36.3 +/- 5.0 27.6 -45.0 STW-1 040 11/15104 1-131 22.4 +/- 1.9 22.0 +/- 5.0 16.9 - 27.3 STW-1 041 11/15/04 Ra-226 9.8 +/- 0.4 9.2 +/- 1.4 6.8 - 11.6 STW-1041 11/15104 Ra-228 8.6 +/- 0.3 7.1 +/-1.8 7.0 - 10.2 STW-1041 11/15/04 Uranium 11.1 +/-0.3 11.4 +/- 3.0 6.2 - 16.6 STW-1042 11/15/04 H-3 21218.0 +/- 285.0 20700.0 +/- 2070.0 17100.0 - 24300.0

' 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 detenninatons.

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

IVI-2

TABLE IV-2. Crosscheck program results; Thermoluminescent Dosimetry, (TLDs).

mR Lab Code TLD Type Date Known Lab Result Control Description Value +/- 2 sigma Limits Environmental. Inc.

2003-1 CaSO4: Dy Cards 8/8/2003 Reader 1,120 4.69 4.74 +/- 0.54 3.28 - 6.10 2003-1 CaSO4: Dy Cards 8/8/2003 Reader 1,150 3.00 3.02 +/- 0.20 2.10 - 3.90 2003-1 CaSO4: Dy Cards 8/8/2003 Reader 1, 180 2.08 1.89 +/- 0.45 1.46 - 2.70 2003-1 CaSO4: Dy Cards 8/8/2003 Reader 1,180 2.08 2.11 +/- 0.22 1.46 - 2.70 2003-1 CaSO4: Dy Cards 8/8/2003 Reader 1,30 75.00 84.40 +/- 4.87 52.50 - 97.50 2003-1 CaSO4: Dy Cards 8/8/2003 Reader 1,60 18.75 19.11 +/- 1.86 13.13 - 24.38 2003-1 CaSO4: Dy Cards 8/8/2003 Reader 1,60 18.75 22.82 +/- 5.41 13.13 - 24.38 2003-1 CaSO4: Dy Cards 8/8/2003 Reader 1,90 8.33 9.05 +/- 1.17 5.83 - 10.83 2003-1 CaSO4: Dy Cards 8/8/2003 Reader 1,90 8.33 7.60 +/- 1.08 5.83 - 10.83 Environmental, Inc.

2003-2 CaSO4: Dy Cards 1/12/2004 Reader 1,30 61.96 73.50 i 2.58 43.37 - 80.55 2003-2 CaSO4: Dy Cards 1/12/2004 Reader 1,60 15.49 19.70 +/- 0.51 10.84 - 20.14 2003-2 CaSO4: Dy Cards 1/12/2004 Reader 1,60 15.49 16.93 +/- 1.37 10.84 - 20.14 2003-2 CaSO4: Dy Cards 1/12/2004 Reader 1,90 6.88 8.06 +/- 0.60 4.82 - 8.94 2003-2 CaSO4: Dy Cards 1/12/2004 Reader 1,90 6.88 6.64 +/- 0.58 4.82 - 8.94 2003-2 CaSO4: Dy Cards 1/12/2004 Reader 1,120 3.87 4.39 +/- 0.17 2.71 - 5.03 2003-2 CaSO4: Dy Cards 1/12/2004 Reader 1,150 2.48 2.34 +/- 0.18 1.74 - 3.22 2003-2 CaSO4: Dy Cards 1/12/2004 Reader 1,150 2.48 2.51 +/- 0.16 1.74 - 3.22 2003-2 CaSO4: Dy Cards 1/12/2004 Reader 1,180 1.72 2.01 +/- 0.13 1.20 - 2.24 Environmental. Inc.

2004-1 CaSO4: Dy Cards 7/12/2004 Reader 1, 30 cm 55:23 61.07 +/- 4.38 38.66 - 71.80 2004-1 CaSO4: Dy Cards 7/1212004 Reader 1, 30 cm 55.23 62.82 +/- 1.75 38.66 - 71.80 2004-1 CaSO4: Dy Cards 7/1212004 Reader 1, 60 cm 13.81 14.10 +/- 0.56 9.67 - 17.95 2004-1 CaSO4: Dy Cards 7/12/2004 Reader 1, 60 cm 13.81 14.03 +/- 0.48 9.67 - 17.95 2004-1 CaSO4: Dy Cards 7/12/2004 Reader 1, 90 cm 6.14 5.97 +/- 0.21 4.30 - 7.98 2004-1 CaSO4: Dy Cards 7/12/2004 Reader 1,90 cm 6.14 6.26 +/- 0.14 4.30 - 7.98 2004-1 CaSO4: Dy Cards 7/12/2004 Reader 1,120 cm 3.45 4.40 +/- 0.63 2.42 - 4.49 2004-1 CaSO4: Dy Cards 7/12/2004 Reader 1, 150 cm 2.21 2.34 +/- 0.12 1.55 - 2.87 2004-1 CaSO4: Dy Cards 7/12/2004 Reader 1,180 cm 1.53 1.65 +/- 0.02 1.07 - 1.99 IV2-1

TABLE IV-3. In-House"Spike'Samples Concentration (pCi/L)a Lab Code Sample Date Analysis Laboratory results Known Control Type 2s, n=1 b Activity Limitsc SPVE-707 Vegetation 2/20/2004 1-131 (G) 5.68 +/-0.15 4.93 2.96 - 6.90 SPCH-711 Charcoal 2/20/2004 1-131 (G) 6.35 i 0.11 6.94 0.00 - 16.94 SPW-721 water 2/20/2004 Ni-63 161.00 +/- 13.20 169.00 101.40 - 236.60 SPAP-733 Air Filter 2/25/2004 Gr. Beta 1.39 +/- 0.02 1.48 0.00 - 11.48 SPW-735 water 2/25/2004 Cs-1 34 41.59 +/- 7.02 39.10 29.10 - 49.10 SPW-735 water 2/25/2004 Cs-1 37 64.11 +/-7.39 64.56 54.56 - 74.56 SPW-735 water 2/25/2004 1-131 36.55 +/- 0.48 40.08 28.08 - 52.08 SPW-735 water 2/25/2004 1-131 41.97 +/- 8.93 40.08 28.08 - 52.08 SPMI-737 Milk 2/25/2004 Cs-1 34 37.40 +/- 5.40 39.10 29.10 - 49.10 SPMI-737 Milk 2/25/2004 Cs-1 37 69.13 +/- 9.58 64.56 54.56 - 74.56 SPMI-737 Milk 2/25/2004 1-131 45.03 +/- 0.53 40.08 28.08 - 52.08 SPMI-737 Milk 2/25/2004 1-131 44.43 +/- 9.22 40.08 28.08 - 52.08 SPW-1 109 water 3/18/2004 Fe-55 39.98 +/- 1.72 39.98 23.99 - 55.97 SPW-1496 water 4/7/2004 H-3 80006.60 +/- 776.00 83896.00 67116.80 - 100675.20 SPMI-1683 Milk 4/16/2004 Sr-90 42.80 +/- 1.81 43.43 34.74 - 52.12 SPW-1683 water 4/16/2004 1-131 54.47 +/- 0.73 66.60 53.28 - 79.92 SPW-1683 water 4/16/2004 1-131(G) 65.82 +/- 8.86 66.60 56.60 - 76.60 SPMI-1685 Milk 4/16/2004 Cs-134 33.60 +/- 4.24 37.29 27.29 - 47.29 SPMI-1685 Milk 4/16/2004 Cs-137 61.77 +/- 7.59 64.36 54.36 - 74.36 SPMI-1685 Milk 4/16/2004 1-131 65.85 +/- 0.79 66.60 53.28 - 79.92 SPMI-1685 Milk 4/16/2004 1-131 (G) 75.56 +/- 11.86 66.60 56.60 - 76.60 SPMI-1685 Milk 4/16/2004 Sr-90 42.56 +/- 1.66 43.43 34.74 - 52.12 SPW-1686 water 4/16/2004 Cs-134 39.31 +/- 4.35 37.29 27.29 - 47.29 SPW-1 686 water 4/16/2004 Cs-1 37 67.73 +/- 7.92 64.36 54.36 - 74.36 SPVE-1862 Vegetation 4/26/2004 1-131 (G) 1.32 +/- 0.03 1.12 0.67 - 1.57 SPCH-1886 Charcoal 4/26/2004 1-131 (G) 2.90 +/- 0.07 2.80 1.68 - 3.92 SPAP-1 888 Air Filter 4/27/2004 Gr. Beta 1.35 +/- 0.02 1.48 0.00 - 11.48 SPF-1917 Fish 4/29/2004 Cs-1 34 1.44 +/- 0.04 1.47 0.88 - 2.06 SPF-1917 Fish 4/29/2004 Cs-1 37 1.33 +/- 0.06 1.29 0.77 - 1.81 SPW-3151 water 6/24/2004 Fe-55 33.85 +/- 1.61 37.32 22.39 - 52.25 SPW-4232 water 8/4/2004 H-3 80225.00 +/- 785.00 82380.00 65904.00 - 98856.00 SPAP-4234 Air Filter 8/4/2004 Gr. Beta 1.63 +/- 0.02 1.46 0.00 - 11.46 SPW-5712 water 10/6/2004 Cs-1 34 61.04 +/- 2.51 63.61 53.61 - 73.61 SPW-5712 water 10/6/2004 Cs-I 37 62.01 +/- 2.76 63.66 53.66 - 73.66 SPW-5712 water 10/6/2004 Sr-90 48.40 +/- 2.00 42.94 34.35 - 51.53 SPMI-5714 Milk 10/6/2004 Sr-90 41.61 +/- 1.57 42.94 34.35 - 51.53 IV3-1

TABLE IV-3. In-House "Spike" Samples Concentration (pCi/L)

Lab Code Sample Date Analysis Laboratory results Known Control Type 2s, n=lb Activity Limitsc SPMI-7418 Milk 12/22/2004 Cs-1 34 59.09 +/- 2.59 59.25 49.25 -69.25 SPMI-7418 Milk 12/22/2004 Cs-1 37 65.45 +/- 5.61 63.35 53.35 - 73.35 SPW-7420 water 12/22/2004 Cs-134 58.42 +/- 1.99 59.25 49.25 - 69.25 SPW-7420 water 12/22/2004 Cs-137 64.26 +/-4.18 63.35 53.35 -73.35 SPW-7420 water 12122/2004 Sr-89 105.26 +/-4.21 103.47 82.78 - 124.16 SPW-7420 water 12/22/2004 Sr-90 48.24 +/- 1.70 42.72 34.18 - 51.26 SPAP-7437 Air Filter 12/22/2004 Gr. Beta 1.65 +/- 0.02 1.45 0.00 - 11.45 SPF-7524 Fish 12/2912004 Cs-134 1.11 +/- 0.03 1.27 0.76 -1.78 SPF-7524 Fish 12/29/2004 Cs-1 37 1.21 +/- 0.05 1.19 0.71 - 1.67 SPW-7526 water 12/29/2004 H-3 78615.70 +/- 773.70 80543.00 64434.40 - 96651.60 SPW-7532 water 12/29/2004 Fe-55 30894.00 +/- 1484.00 32752.00 26201.60 - 39302.40 SPW-7540 water 12/29/2004 Tc-99 30.28 +/- 1.11 32.98 20.98 - 44.98

' Liquid sample results are reported inpCi/Liter, air filters (pCVm3), charcoal (pCi/iM3), and solid samples (pCi/g).

b Results are based on single determinations.

C Control limits are based on Attachment A, Page A2 of this report.

NOTE: For fish, Jello is used for the Spike matrix. For Vegetation, cabbage is used for the Spike matrix.

IV3-2

TABLE IV-4. In-House "Blank" Samples Concentration (pCIL)a Lab Code Sample Date Analysis Laboratory results (4.66a) Acceptance Type LLD Activityb Criteria (4.66 a)

SPCH-712 Charcoal 2/20/2004 1-131(G) 2.24 9.6 SPW-722 Water 2/20/2004 Ni-63 2.64 -0.78 i 1.58 20 SPAP-734 Air Filter 2/25/2004 Gr. Beta 0.96 -1.02 +/- 0.42 3.2 SPW-736 Water 2/25/2004 Cs-1 34 2.47 10 SPW-736 Water 2/25/2004 Cs-1 37 1.91 10 SPW-736 Water 2/25/2004 1-131 0.15 -0.031 +/- 0.10 0.5 SPW-736 Water 2/25/2004 1-131(G) 3.24 20 SPMI-738 Milk 2/25/2004 Cs-1 34 2.54 10 SPMI-738 Milk 2/25/2004 Cs-1 37 5.34 10 SPMI-738 Milk 2/25/2004 1-131 0.16 -0.071 +/- 0.10 0.5 SPMI-738 Milk 2/25/2004 1-131 (G) 5.36 20 SPW-1110 Water 3/18/2004 Fe-55 772.70 168.4 +/- 480.90 1000 SPW-1497 Water 4/7/2004 H-3 152.30 81.4 +/- 79.40 200 SPW-1684 Water 4/16/2004 Cs-1 34 2.43 10 SPW-1684 Water 4/16/2004 Cs-1 37 2.53 10 SPW-1684 Water 4/16/2004 1-131 0.50 0.21 i 0.26 0.5 SPW-1684 Water 4/16/2004 1-131 (G) 4.49 20 SPW-1684 Water 4/16/2004 Sr-89 0.64 0.19 +/- 0.52 5 SPW-1684 Water 4/16/2004 Sr-90 0.64 0.13 +/- 0.31 1 SPMI-1686 Milk 4/16/2004 Cs-1 34 5.00 10 SPMI-1686 Milk 4/16/2004 Cs-1 37 4.16 10 SPMI-1686 Milk 4/16/2004 1-131 0.45 0.13 +/- 0.24 0.5 SPMI-1686 Milk 4/16/2004 1-131 (G) 6.53 20 SPMI-1686 Milk 4/16/2004 Sr-89 0.71 0.11 +/- 0.70 5 SPMI-1686 Milk 4/16/2004 Sr-90 0.71 0.66 +/- 0.40 1 SPVE-1 863 Vegetation 4/26/2004 1-131(G) 3.55 20 SPCH-1887 Charcoal 4/26/2004 1-131 (G) 7.04 9.6 SPAP-1 889 Air Filter 4/27/2004 Gr. Beta 0.74 -0.96 +/- 0.35 3.2 SPF-1918 Fish 4/29/2004 Cs-134 7.13 100 SPF-1918 Fish 4/29/2004 Cs-1 37 6.59 100 SPW-3152 Water 6/24/2004 Fe-55 790.30 -70.0 +/- 474.50 1000 SPW-4233 Water 8/4/2004 H-3 154.23 102.67 +/- 81.38 200 SPAP-4235 Air Filter 8/4/2004 Gr. Beta 0.96 -0.99 +/- 0.38 3.2 SPW-5711 Water 10/6/2004 Co-60 4.26 10 SPW-5711 Water 10/6/2004 Cs-134 6.02 10 SPW-5711 Water 10/6/2004 Cs-1 37 5.28 10 SPW-5711 Water 10/6/2004 Sr-90 0.61 -0.13 +/- 0.27 1 IV4-1

TABLE IV-4. In-House "Blank" Samples Concentration (pCi/L)8 Lab Code Sample Date Analysis Laboratory results (4.66a) Acceptance Type LLD Activityb Criteria (4.66 a)

SPMI-5713 Milk 10/6/2004 Cs-1 34 4.60 10 SPMI-5713 Milk 10/6/2004 Cs-1 37 5.81 10 SPMI-5713 Milk 10/6/2004 1-131 (G) 6.07 20 SPMI-5713 Milk 10/6/2004 Sr-90 0.68 1.4 i 0.45 1 SPMI-7419 Milk 12/22/2004 Cs-1 34 8.66 10 SPMI-7419 Milk 12/22/2004 Cs-137 5.61 10 SPMI-7419 Milk 12/22/2004 Sr-90 0.82 1.67 i 0.48 1 SPW-7421 Water 12/22/2004 Sr-89 1.21 0.58 i 0.94 5 SPW-7421 Water 12/22/2004 Sr-90 0.82 0.26 +/- 0.41 1 SPAP-7438 Air Filter 12/22/2004 Gr. Beta 0.93 -0.78 +/- 0.40 3.2 SPF-7525 Fish 12/29/2004 Cs-1 34 8.27 100 SPF-7525 Fish 12/29/2004 Cs-1 37 10.60 100 SPW-7526 Water 12/29/2004 H-3 164.80 -47.0 +/- 84.60 200 SPW-7533 Water 12/29/2004 Fe-55 753.00 118.6 +/- 465.80 1000 SPW-7535 Water 12/29/2004 Ni-63 13.10 4.3 +/- 8.10 20 SPW-7540 Water 12/29/2004 Tc-99 1.19 -0.036 +/- 0.72 10 8 Liquid sample results are reported In pCi/Liter, air filters( pCi/filter), charcoal (pCi/charcoal canister), and solid samples (pCI/kg).

b Activity reported Is a net activity result. For gamma spectroscopic analysis, activity detected below the LLD value is not reportec C 1-131(G); iodine-131 as analyzed by gamma spectroscopy.

d Low levels of Sr-90 are still detected In the environment. A concentration of (1-5 pCi/L) in milk is not unusual.

IV4-2

TABLE IV-5. In-House 'Duplicate' Samples Concentration (pCi/L)a Averaged Lab Code Date Analysis First Result Second Result Result E-30, 31 1/5/2004 Gr. Beta 1.27 i 0.06 1.26 +/- 0.05 1.27 +/- 0.04 E-30, 31 1/5/2004 K-40 1.33 i 0.21 1.11 +/- 0.20 1.22 +/- 0.15 WW-58, 59 1/5/2004 Gr. Beta 4.20 +/- 1.33 4.46 +/- 1.34 4.33 +/- 0.94 WW-58, 59 1/5/2004 K-40 2.30 +/- 0.23 2.70 +/- 0.27 2.50 +/- 0.18 TD-7889, 7890 1/5/2004 H-3 16582.00 +/- 366.00 16060.00 +/- 360.00 16321.00 +/- 256.69 MI-79, 80 1/72004 K-40 1451.50 +/- 125.90 1383.60 +/- 115.50 1417.55 +/- 85.43 MI-79, 80 17/2004 Sr-90 0.90 +/- 0.31 1.05 +/- 0.34 0.97 +/- 0.23 S-100, 101 1/13/2004 Cs-137 8.50 +/- 0.23 8.52 +/- 0.21 8.51 +/- 0.16 SW-225, 226 1/13/2004 Gr. Alpha 2.62 +/- 1.26 2.05 +/- 1.16 2.34 +/- 0.86 SW-225, 226 1/13/2004 Gr. Beta 6.37 +/- 1.15 4.92 +/- 1.06 5.65 +/- 0.78 U-304, 305 1/16/2004 Gr. Beta 5.18 +/- 1.38 7.04 +/- 1.53 6.11 +/- 1.03 SW-345, 346 1/27/2004 1-131 1.32 +/- 0.24 1.56 +/- 0.21 1.44 +/- 0.16 SWT-423,424 1/27/2004 Gr. Beta 2.34 +/- 0.54 2.38 i 0.52 2.36 +/- 0.38 SWU-469,470 1/27/2004 Gr. Beta 2.99 +/- 0.57 3.09 i 0.67 3.04 +/- 0.44 TD-545, 546 2/2/2004 H-3 658.40 +/- 104.60 712.30 i 106.60 685.35 +/- 74.67 MI-524, 525 2/4/2004 K-40 1240.00 i 147.90 1265.60 +/- 166,30 1252.80 +/- 111.28 MI-567, 568 2/9/2004 K-40 1322.90 +/- 105.50 1340.80 i 112.80 1331.85 +/- 77.22 MI-567, 568 2/9/2004 Sr-90 0.98 +/- 0.48 0.79 i 0.42 0.89 +/- 0.32 MI-588, 589 2/11/2004 K-40 1185.70 +/- 157.80 1337.70 i 160.00 1261.70 +/- 112.36 SWU-778,779 2/24/2004 Gr. Beta 2.55 +/- 0.54 2.53 +/- 0.56 2.54 +/- 0.39 LW-1014, 1015 3/1/2004 Gr. Beta 1.78 +/- 0.56 2.06 +/- 0.57 1.92 +/- 0.40 SW-966, 967 3/9/2004 Gr. Alpha 2.70 +/- 1.43 2.96 i 1.63 2.83 +/- 1.08 SW-966, 967 3/9/2004 Gr. Beta 8.06 +/- 1.20 7.33 +/- 1.21 7.69 +/- 0.85 SW-966, 967 3/9/2004 H-3 182.04 +/- 86.24 198.87 _ 86.97 190.45 +/- 61.24 SW-1249, 1250 3131/2004 Gr. Beta 4.71 +/- 1.11 5.25 +/- 1.10 4.98 +/- 0.78 LW-1464, 1465 3/31/2004 Gr. Beta 2.13 +/- 0.52 2.39 i 0.53 2.26 +/- 0.37 AP-1 633, 1634 3/31/2004 Be-7 0.05 +/- 0.02 0.05 +/- 0.02 0.05 +/- 0.01 AP-1714, 1715 3/31/2004 Be-7 0.04 +/- 0.01 0.05 i 0.01 0.05 +/- 0.01 TD-1489, 1490 4/1/2004 H-3 681.00 +/- 110.00 709.00 i 111.00 695.00 +/- 78.14 SWT-1299,1300 4/2/2004 Gr. Beta 3.13 +/- 0.57 3.64 i 0.60 3.39 +/- 0.41 DW-1420, 1421 4/2/2004 Gr. Beta 1.29 +/- 0.83 1.62 i 0.87 1.46 +/- 0.60 DW-1510,1511 4/2/2004 1-131 0.68 +/- 0.27 0.62 +/- 0.36 0.65 +/- 0.23 BS-1537, 1538 4/6/2004 Gr. Beta 6.81 +/- 1.20 6.76 +/- 1.23 6.78 +/- 0.86 WW-1654,1655 4/13/2004 Gr. Beta 6.83 +/- 1.17 5.60 +/- 1.12 6.21 +/- 0.81 LW-1680, 1681 4/13/2004 Gr. Beta 2.45 +/- 0.64 2.93 +/- 0.62 2.69 +/- 0.45 MI-1735, 1736 4/14/2004 K-40 1384.90 +/- 182.00 1408.20 +/- 187.90 1396.55 +/- 130.80 MI-1802, 1803 4/19/2004 K-40 1327.50 i 109.10 1206.30 +/- 113.30 1266.90 +/- 78.64 Ml-1802,1803 4/19/2004 Sr-90 0.72 +/- 0.40 0.77 i 0.41 0.74 +/- 0.28 U-1781, 1782 4/21/2004 Gr. Alpha 0.20 +/- 1.90 -0.30 +/- 2.40 -0.05 +/- 1.53 SWT-1 933,1934 4/27/2004 Gr. Beta 2.60 +/- 0.55 2.33 +/- 0.52 2.46 +/- 0.38 F-1912, 1913 4/29/2004 H-3 8875.00 +/- 250.00 9119.00 +/-253.00 8997.00 +/- 177.84 F-1912, 1913 4/2912004 K-40 3406.90 +/- 533.30 3550.60 +/- 581.40 3478.75 +/- 394.47 LW-1960, 1961 4129/2004 Gr. Beta 2.23 +/- 0.55 2.38 _ 0.57 2.31 +/- 0.40 IV5-1

TABLE IV-5. In-House 'Duplicate" Samples Concentration (pCi/L)a Averaged Lab Code Date Analysis First Result Second Result Result BS-2083, 2084 513/2004 Be-7 1.10 +/- 0.44 1.17 +/- 0.20 1.14 +/- 0.24 BS-2083, 2084 5/3/2004 Gr. Beta 28.44 +/- 2.27 25.56 +/- 2.04 27.00 +/- 1.53 BS-2083, 2084 513/2004 K-40 6.75 +/- 0.89 6.35 +/- 0.53 6.55 +/- 0.52 BS-2083, 2084 5/3/2004 Sr-90 0.12 +/-0.04 0.17 +/- 0.05 0.15 +/- 0.03 Ml-2225, 2226 5/1112004 K-40 1396.30 +/- 124.20 1227.60 +/- 125.40 1311.95 +/- 88.25 SW-2267, 2268 5/11/2004 Gr. Alpha 2.95 +/- 1.44 2.41 +/- 1.37 2.68 +/- 0.99 SW-2267, 2268 5/11/2004 Gr. Beta 6.80 +/- 1.18 7.25 +/- 1.21 7.03 +/- 0.84 MI-2437, 2438 5/17/2004 K-40 1549.00 +/- 123.40 1566.20 +/- 118.60 1557.60 +/- 85.58 MI-2437, 2438 5/17/2004 Sr-90 1.83 +/- 0.44 1.99 +/- 0.42 1.91 +/- 0.30 F-2413, 2414 5/20/2004 K-40 2844.60 +/- 550.40 2963.00 +/- 532.30 2903.80 +/- 382.85 SO-2578, 2579 5/26/2004 Cs-1 37 0.16 +/- 0.02 0.21 i 0.05 0.18 +/- 0.03 SO-2578,2579 5/26/2004 Gr. Beta 28.07 +/- 3.24 28.73 +/- 3.00 28.40 i 2.21 SO-2578, 2579 5/26/2004 K-40 19.41 +/- 0.78 18.93 +/- 1.04 19.17 +/-0.65 SS-2603, 2604 5/26/2004 Cs-1 37 0.06 +/- 0.02 0.06 +/- 0.02 0.06 +/- 0.02 SS-2603, 2604 5/26/2004 K-40 10.18 +/- 0.63 10.43 +/- 0.56 10.30 +/-0.42 G-2677, 2678 6/1/2004 Be-7 1.31 +/- 0.25 1.25 +/- 0.23 1.28 +/- 0.17 G-2677, 2678 6/1/2004 Gr. Beta 5.73 +/- 0.12 5.86 +/- 0.12 5.79 i 0.09 G-2677, 2678 6/1/2004 K-40 5.56 +/- 0.49 5.78 +/- 0.50 5.67 i 0.35 G-2677, 2678 6/1/2004 Sr-90 0.01 +/- 0.00 0.01 +/- 0.01 0.01 O0.00 DW-2700, 2701 6/1/2004 Gr. Beta 1.82 +/- 1.01 2.66 +/- 0.94 2.24 +/- 0.69 TD-2876, 2877 6/1/2004 H-3 13116.00 +/- 324.00 12746.00 +/- 320.00 12931.00 +/- 227.69 MI-2724, 2725 6/3/2004 K-40 1509.00 +/- 116.10 1489.20 +/- 126.10 1499.10 +/- 85.70 MI-2724, 2725 6/3/2004 Sr-90 1.64 +/- 0.46 1.81 +/- 0.44 1.73 +/- 0.32 BS-2921, 2922 6/3/2004 K-40 8.32 +/- 0.63 8.55 +/- 0.62 8.44 +/- 0.44 TD-2876, 2877 6/4/2004 H-3 13116.00 +/- 324.00 12746.00 +/- 320.00 12931.00 +/- 227.69 BS-2897, 2898 6/4/2004 Gr. Beta 9.31 +/- 1.43 8.82 +/- 1.39 9.06 +/- 1.00 SWU-3092, 3093 6/9/2004 Gr. Beta 1.95 +/- 0.71 2.55 +/- 0.76 2.25 +/- 0.52 CF-2986, 2987 6/14/2004 Be-7 0.69 +/- 0.12 0.84 +/- 0.19 0.76 +/- 0.11 CF-2986, 2987 6/14/2004 K-40 4.50 +/- 0.32 3.82 +/- 0.48 4.16 +/- 0.29 Ml-2977, 2978 6/15/2004 K-40 1486.70 +/- 120.10 1291.60 +/- 167.40 1389.15 +/- 103.01 MI-3007, 3008 6/15/2004 K-40 1333.90 +/- 121.30 1355.80 +/- 176.50 1344.85 +/- 107.08 W-3031, 3032 6/18/2004 H-3 642.00 +/- 108.00 562.00 +/- 105.00 602.00 +/- 75.31 W-3071, 3072 6/21/2004 H-3 273.00 i 94.00 203.00 +/- 92.00 238.00 +/- 65.76 SW-3145, 3 14 6 b 6/22/2004 1-131 0.97 +/- 0.20 1.43 +/- 0.20 1.20 +/- 0.14 DW-3278, 3279 6/25/2004 1-131 0.67 +/- 0.26 0.48 +/- 0.25 0.57 +/- 0.18 AP-3922, 3923 6/28/2004 Be-7 0.08 +/- 0.01 0.07 +/- 0.01 0.07 +/- 0.01 AP-3637, 3638 6/29/2004 Be-7 0.08 +/- 0.01 0.07 +/- 0.01 0.07 +/- 0.01 LW-3589, 3590 6/30/2004 Gr. Alpha 0.28 +/- 0.55 1.29 +/- 0.89 0.79 +/- 0.53 LW-3589, 3590 6/30/2004 Gr. Beta 1.91 +/-0.64 2.86 +/- 0.70 2.39 +/- 0.48 LW-3589, 3590 6/30/2004 H-3 8369.20 +/- 262.57 8226.01 +/- 260.51 8297.61 +/- 184.94 AP-3943, 3944 6/30/2004 Be-7 0.08 +/- 0.02 0.09 +/- 0.02 0.08 +/- 0.01 IV5-2

TABLE IV-5. In-House "Duplicate' Samples Concentration (pCi/L)9 Averaged Lab Code Date Analysis First Result Second Result Result E-3327, 3328 7/112004 Gr. Beta 1.21 +/- 0.06 1.35 +/- 0.07 1.28 +/- 0.05 E-3327, 3328 7/1/2004 K-40 1.08 +/- 0.20 1.30 +/- 0.22 1.19 +/- 0.15 G-3377, 3378 7/1/2004 Be-7 1.10 +/- 0.13 1.16 +/- 0.16 1.13 +/-0.10 G-3377, 3378 7/1/2004 Gr. Beta 6.42 +/- 0.19 6.28 +/- 0.19 6.35 +/- 0.13 G-3377, 3378 7/1/2004 K-40 5.26 +/- 0.31 5.36 +/- 0.28 5.31 +/- 0.21 VE-3681, 3682 7/13/2004 K-40 2.65 +/- 0.45 2.90 +/- 0.61 2.77 +/- 0.38 CF-3707, 3708 7/13/2004 Be-7 1.97 +/- 0.44 2.11 +/- 0.25 2.04 +/- 0.25 CF-3707, 3708 7/13/2004 K-40 5.39 +/- 0.44 4.98 +/- 0.42 5.19 +/- 0.30 SW-3773, 3774 7/14/2004 H-3 10697.20 +/- 295.70 10689.60 +/- 295.70 10693.40 +/- 209.09 LW-3849,3850 7/14/2004 Gr. Beta 2.21 +/- 0.54 2.32 +/- 0.65 2.27 +/- 0.42 SWU-4307, 4308 7/14/2004 Gr. Beta 3.49 +/- 0.57 3.68 +/- 0.61 3.59 i 0.42 MI-4051, 4052 7/28/2004 K-40 1190.70 +/- 204.60 1357.00 +/- 145.90 1273.85 +/- 125.65 VE-4079, 4080 7/28/2004 K-40 4.90 +/- 0.51 4.62 +/- 0.61 4.76 +/-0.40 MI-4163, 4164 7/28/2004 K-40 1422.40 +/- 186.50 1330.80 +/- 181.00 1376.60 +/- 129.95 MI-4163. 4164 7/28/2004 Sr-90 0.87 +/- 0.32 1.00 +/- 0.35 0.93 +/- 0.24 WW-4387,4388 8/3/2004 Gr. Beta 5.94 +/- 0.76 6.28 +/- 0.76 6.11 +/- 0.54 MI-4286, 4287 8/4/2004 K-40 1435.20 +/- 76.90 1404.70 +/- 80.54 1419.95 +/- 55.68 MI-4286, 4287 8/4/2004 Sr-90 1.88 +/- 0.40 1.31 +/- 0.35 1.59 + 0.26 VE-4370,4371 8/4/2004 H-3 0.54 +/- 0.08 0.62 +/- 0.08 0.58 +/- 0.06 VE-4408,4409 8/5/2004 K-40 2.03 +/- 0.39 2.12 +/- 0.32 2.08 +/- 0.25 VE-4467,4468 8/9/2004 K-40 6.28 +/- 0.76 6.11 +/-0.75 6.20 +/- 0.53 MI-4492, 4493 8/10/2004 K-40 1478.70 +/- 116.70 1472.50 +/- 105.10 1475.60 +/- 78.53 MI-4492, 4493 8/10/2004 Sr-90 1.35 +/- 0.40 1.08 +/- 0.42 1.22 +/- 0.29 MI-4518, 4519 8/11/2004 K-40 1197.30 +/- 158.50 1350.20 +/- 202.30 1273.75 +/- 128.50 VE-4748, 4749 8/25/2004 Gr. Beta 2.31 +/- 0.05 2.32 +/- 0.05 2.31 +/- 0.04 VE-4748, 4749 8/25/2004 K-40 1.70 +/- 0.25 1.94 +/- 0.31 1.82 +/- 0.20 LW-4769,4770 8/26/2004 Gr. Beta 2.00 +/- 0.58 2.07 +/- 0.58 2.04 +/- 0.41 ME-4905, 4906 9/1/2004 Gr. Beta 3.06 +/- 0.10 2.93 +/- 0.10 3.00 +/- 0.07 ME-4905, 4906 9/1/2004 K-40 2.33 +/- 0.67 3.26 +/- 0.58 2.80 +/- 0.44 MI-4926, 4927 9/1/2004 K-40 1316.20 +/- 115.40 1285.80 +/- 117.30 1301.00 +/- 82.27 MI-4926, 4927 9/1/2004 Sr-90 3.62 +/- 0.52 2.07 +/- 0.43 2.84 +/- 0.34 VE-5027, 5028 9/2/2004 Gr. Beta 2.43 +/- 0.07 2.39 +/- 0.06 2.41 +/- 0.05 VE-5027, 5028 9/2/2004 K-40 1.77 i 0.20 1.94 + 0.31 1.86 +/- 0.18 SW-5003, 5004 9/7/2004 1-131 1.69 +/- 0.23 1.50 + 0.25 1.59 +/- 0.17 MI-5050, 5051 9/7/2004 K-40 1559.40 +/- 131.80 1560.70 +/- 121.20 1560.05 +/- 89.53 MI-5050, 5051 9/7/2004 Sr-90 2.26 +/- 0.52 1.61 +/- 0.47 1.94 +/- 0.35 WW-5072, 5073 9/7/2004 Gr. Beta 4.31 i 0.70 4.11 +/-0.69 4.21 +/- 0.49 SW-5216, 5217 9/14/2004 Gr. Alpha 4.34 +/- 1.71 4.30 +/- 1.77 4.32 +/- 1.23 SW-5216, 5217 9/14/2004 Gr. Beta 7.97 +/- 1.24 8.58 +/- 1.29 8.27 +/- 0.89 IV5-3

TABLE IV-5. In-House "Duplicate' Samples Concentration (pC iL)a Averaged Lab Code Date Analysis First Result Second Result Result G-5237, 5238 9/15/2004 Be-7 1.18 +/- 0.23 1.28 i 0.24 1.23 +/- 0.17 G-5237, 5238 9/1512004 K-40 7.16 +/- 0.58 7.56 +/- 0.55 7.36 +/-040 LW-5316, 5317 9/16/2004 Gr. Beta 2.76 +/- 0.58 2.64 +/- 0.54 2.70 +/- 0.40 SS-5450, 5451 9/24/2004 K-40 10.33 +/- 0.66 10.10 +/- 0.74 10.22 +/- 0.50 AP-6308, 6309 9/27/2004 Be-7 0.08 +/- 0.01 0.08 +/- 0.01 0.08 +/- 0.01 SWU-5495, 5496 9/28/2004 Gr. Beta 3.38 +/- 1.78 4.41 +/- 1.94 3.90 +/- 1.32 AP-6070, 6071 9128/2004 Be-7 0.08 +/- 0.01 0.08 +/- 0.01 0.08 +/- 0.01 G-5516, 5517 9/29/2004 Be-7 1.81 +/- 0.29 1.74 +/- 0.30 1.77 +/- 0.21 G-5516, 5517 9/29/2004 K-40 7.35 +/- 0.70 7.43 +/- 0.62 7.39 +/- 0.47 AP-6258, 6259 9/29/2004 Be-7 0.07 +/- 0.01 0.07 +/- 0.01 0.07 +/- 0.01 F-7211, 7212 9/29/2004 Cs-1 37 0.04 i0.01 0.05 +/- 0.02 0.05 +/- 0.01 F-7211, 7212 9/29/2004 K-40 2.76 +/-0.27 3.07 +/- 0.26 2.92 +/- 0.19 BS-5902, 5903 10/1/2004 Co-60 0.25 +/- 0.05 0.26 +/- 0.03 0.25 +/- 0.03 BS-5902, 5903 10/1/2004 Co-60 2.53 +/- 0.11 2.52 +/- 0.06 2.52 +/- 0.06 E-5654, 5655 10/4/2004 Gr. Beta 1.40 i 0.06 1.32 +/- 0.06 1.36 +/- 0.04 E-5654, 5655 10/4/2004 K-40 1.32 i 0.26 1.22 +/- 0.24 1.27 +/- 0.18 MI-5676, 5677 10/4/2004 K-40 1311.00 +/- 122.00 1398.00 +/- 125.00 1354.50 +/- 87.33 S0-5756, 5757 10/4/2004 Gr. Alpha 7.12 i 3.09 6.69 +/- 2.92 6.91 +/- 2.13 SO-5756, 5757 10/4/2004 Gr. Beta 19.66 i 2.63 22.32 +/- 2.65 20.99 +/- 1.87 SO-5756, 5757 10/4/2004 K-40 16.45 +/- 0.86 17.52 +/-0.78 16.99 +/- 0.58 VE-6483, 6484 10/6/2004 K-40 9.35 +/- 0.55 9.88 i 0.23 9.61 +/- 0.30 MI-5923, 5924 10/12/2004 K-40 1333.60 +/- 183.50 1552.40 +/- 179.20 1443.00 +/- 128.24 SS-6046, 6047 10/13/2004 Cs-1 37 0.02 +/- 0.01 0.02 +/- 0.01 0.02 +/- 0.01 SS-6046, 6047 10/13/2004 Gr. Beta 7.93 +/- 1.72 9.57 i 1.88 8.75 +/- 1.27 SS-6046, 6047 10/13/2004 K-40 5.77 +/- 0.42 5.77 +/- 0.40 5.77 +/- 0.29 DW-6208, 6209 10/15/2004 1-131 0.89 i 0.26 0.65 +/- 0.27 0.77 +/- 0.19 BS-6694, 6695 10/1912004 K-40 11.84 +/- 0.67 12.75 +/- 0.79 12.29 +/- 0.52 VE-6354, 6355 10/25/2004 Gr. Beta 4.82 i 0.14 4.76 +/- 0.14 4.79 +/- 0.10 VE-6354, 6355 1012512004 K-40 4.71 +/- 0.54 4.82 +/- 0.61 4.77 +/- 0.41 DW-6462, 6463 10/27/2004 Gr. Beta 8.46 +/- 1.27 8.22 +/- 1.24 8.34 +/- 0.89 LW-6377, 6378 10/28/2004 Gr. Beta 2.18 +/- 0.54 2.33 +/- 0.53 2.25 +/- 0.38 SS-6504, 6505 10/29/2004 K-40 9.28 +/- 0.61 8.51 +/- 0.78 8.89 +/- 0.50 LW.6762. 6763 10/31/2004 Gr. Beta 1.85 +/- 0.66 1.69 +/- 0.64 1.77 +/- 0.46 BS-6576, 6577 11/1/2004 Gr. Beta 11.02 +/- 1.54 13.77 +/- 1.77 12.40 +/- 1.17 BS-6576, 6577 11/1/2004 K-40 9.43 +/- 0.71 8.84 +/- 0.68 9.14 +/- 0.49 SO-6715, 6716 11/2/2004 Cs-137 0.29 +/- 0.04 0.33 +/- 0.06 0.31 +/- 0.04 SO-6715, 6716 11/2/2004 Gr. Alpha 10.94 i3.95 14.72 +/- 4.16 12.83 +/- 2.87 SO-6715, 6716 11/2/2004 Gr. Beta 21.33 i 3.10 24.82 +/- 3.10 23.07 +/- 2.19 S0-6715, 6716 11/2/2004 K-40 10.42 00.71 12.16 +/- 1.06 11.29 +/- 0.64 VE-6673, 6674 11/8/2004 Gr. Alpha 0.07 +/- 0.04 0.14 +/- 0.05 0.11 +/- 0.03 VE-6673, 6674 11/8/2004 Gr. Beta 4.50 00.12 4.48 +/- 0.12 4.49 +/- 0.09 VE-6673, 6674 11/8/2004 K-40 4.05 +/- 0.49 4.65 +/- 0.55 4.35 +/- 0.37 IV5-4

TABLE IV-5. In-House "Duplicate" Samples Concentration (pCVL)m Averaged Lab Code Date Analysis First Result Second Result Result S0-6820, 6821 11/10/2004 K-40 14.41 +/- 1.03 15.01 +/- 1.09 14.71 +/-0.75 S0-6820, 6821 11/10/2004 Sr-90 0.04 +/- 0.02 0.07 +/- 0.02 0.06 +/- 0.02 SWU-7160, 7161 11/30/2004 Gr. Beta 4.39 +/- 1.98 3.09 +/- 1.77 3.74 +/- 1.33 MI-7062, 7063 12/1/2004 K-40 1456.00 +/- 124.80 1640.50 + 131.40 1548.25 +/- 90.61 Ml-7062, 7063 12/1/2004 Sr-90 1.13 +/-0.41 0.98 +/- 0.43 1.06 +/- 0.30 S-7281, 7282 1215/2004 Cs-137 0.82 +/- 0.15 1.16 +/- 0.20 0.99 +/- 0.12 VE-7343,7344 12/13/2004 Gr.Beta 5.25 +/-0.14 5.08 +/-0.14 5.16 +/- 0.10 VE-7343, 7344 12/13/2004 K-40 4.23 +/- 0.71 4.33 +/- 0.69 4.28 +/- 0.49 MI-7317, 7318 12/14/2004 K-40 1702.80 +/- 129.70 1536.80 +/- 115.10 1619.80 +/- 86.70 WW-7375,7376 12/14/2004 Gr. Beta 14.13 +/- 1.03 15.22 +/- 1.06 14.68 +/- 0.74 SWU-7507,7508 12/14/2004 Gr. Beta 4.48 +/- 0.66 5.31 +/- 0.69 4.89 +/- 0.48 DW-7563, 7564 12/27/2004 Gr. Beta 1.88 +/- 0.51 2.34 +/- 0.52 2.11 +/- 0.37 P-7698, 7699 12/27/2004 H-3 246.01 +/- 95.00 259.06 +/- 95.51 252.53 +/- 67.35 AP-7741, 7742 12/28/2004 Be-7 0.06 +/- 0.02 0.05 +/- 0.02 0.05 +/- 0.01 Note: Duplicate analyses are performed on every twentieth sample received in-house. Results are not listed for those analyses with activities that measure below the LLD.

a Results are reported in units of pCi/L, except for air filters (pCi/Filter), food products, vegetation, soil, sediment (pCi/g).

b 600 minute count time or longer, resulting in lower error.

IV5-5

TABLE IV-6. Department of Energy's Mixed Analyte Performance Evaluation Program (MAPEP)a.

Concentrationb Known Control Lab Code Type Date Analysis Laboratory result Activity Limitsc STSO-1022 soil 05/01/04 Am-241 65.90 i 4.50 66.97 +/- 6.70 46.88 - 87.06 STSO-1022 soil 05/01/04 Co-57 388.90 +/- 4.00 399.60 +/- 40.00 279.72 - 519.48 STSO-1022 soil 05/01/04 Co-60 524.80 +/- 7.10 518.00 +/- 51.80 362.60 - 673.40 STSO-1022 soil 05/01/04 Cs-134 403.40 +/- 4.60 414.40 +/- 41.40 290.08 - 538.72 STSO-1022 soil 05/01/04 Cs-137 829.10 +/- 7.60 836.20 +/- 83.62 585.34 - 1088.00 STSO-1022 soil 05/01/04 K-40 620.60 +/- 29.50 604.00 +/- 60.40 422.80 - 785.20 STSO-1022 soil 05/01/04 Ni-63 254.80 +/- 8.40 357.05 +/- 35.70 249.94 - 464.17 STSO-1 022 d. soil 05/01/04 Tc-99 59.00 +/- 6.00 117.66 +/- 11.78 82.36 - 152.96 STSO-1 022 d"'soil 05/01/04 U-233/4 24.70 i 3.60 37.00 +/- 3.70 25.90 - 48.40 STSO-1 022 d 'soil 05/01/04 U-238 24.20 +/- 3.50 38.85 +/- 3.90 27.20 - 50.51 STSO-1022 soil 05/01/04 Zn-65 743.00 t 13.10 699.30 +/- 69.90 489.51 - 909.09 STAP-1 023 Air Filter 05/01/04 Gr. Alpha 0.06 +/- 0.02 0.40 +/- 0.04 0.00 - 0.80 STAP-1 023 Air Filter 05/01/04 Gr. Beta 1.37 +/- 0.08 1.20 +/- 0.12 0.60 - 1.80 STAP-1 024 Air Filter 05/01/04 Am-241 0.08 +/- 0.03 0.10 +/- 0.01 0.07 - 0.13 STAP-1 024 Air Filter 05/01/04 Co-57 2.07 +/- 0.06 2.40 +/- 0.24 1.68 - 3.12 STAP-1 024 Air Filter 05/01/04 Co-60 2.11 +/- 0.08 2.30 +/- 0.23 1.61 - 2.99 STAP-1024 6 Air Filter 05/01/04 Cs-1 34 1.78 +/- 0.08 2.90 +/- 0.29 2.03 - 3.77 STAP-1 024 Air Filter 05/01/04 Cs-137 1.76 +/- 0.08 2.00 +/- 0.20 1.40 - 2.60 STAP-1 024 Air Filter 05/01/04 Mn-54 2.84 +/- 0.11 3.00 +/- 0.30 2.10 - 3.90 STAP-1024 Air Filter 05/01/04 Pu-238 0.12 +/- 0.01 0.13 +/- 0.01 0.09 - 0.17 STAP-1024 Air Filter 05/01/04 Pu-239/40 0.08 +/- 0.01 0.09 +/- 0.01 0.06 - 0.12 STAP-1024 Air Filter 05/01/04 Sr-90 0.66 +/- 0.19 0.80 +/- 0.08 0.56 - 1.04 STAP-1024 Air Filter 05/01/04 U-233/4 0.23 +/- 0.03 0.21 +/- 0.02 0.15 - 0.27 STAP-1 024 Air Filter 05/01/04 U-238 0.23 +/- 0.03 0.22 +/- 0.02 0.15 - 0.29 STAP-1 024 Air Filter 05/01/04 Zn-65 3.90 +/- 0.22 4.00 +/- 0.40 2.80 - 5.20 STW-1026 water 05/01/04 Am-241 0.56 +/- 0.07 0.60 +/- 0.06 0.42 - 0.78 STW-1 026 water 05/01/04 Co-57 184.10 +/- 13.50 185.00 +/- 18.50 129.50 - 240.50 STW-1026 water 05/01/04 Co-60 164.40 +/- 11.70 163.00 +/- 16.30 114.10 - 211.90 STW-1026 water 05/01/04 Cs-134 201.10 +/- 14.00 208.00 +/- 20.80 145.60 - 270.40 STW-1 026 water 05/01/04 Cs-1 37 245.50 +/- 15.80 250.00 +/- 25.00 175.00 - 325.00 STW-1026 water 05/01/04 Fe-55 37.60 +/- 25.30 33.00 +/- 3.30 23.10 - 42.90 S1W-1026 water 05/01/04 H-3 76.50 +/- 5.40 83.00 +/- 8.30 58.10 - 107.90 STW-1026 water 05/01/04 Mn-54 272.10 +/- 17.50 267.00 +/- 26.70 186.90 - 347.10 STW-1 026 water 05/01/04 Ni-63 94.40 +/- 3.20 100.00 +/- 10.00 70.00 - 130.00 STW-1 026 water 05/01/04 Pu-238 1.11 +/-0.09 1.20 +/- 0.12 0.84 - 1.56 STW-1026 water 05/01/04 Pu-239/40 0.01 +/- 0.01 0.00 +/- 0.00 0.00 - 0.10 STW-1026 water 05/01/04 Sr-90 6.20 i 1.10 7.00 +/- 0.70 4.90 - 9.10 STW-1026 water 05/01/04 Tc-99 10.70 +/- 1.00 10.00 +/- 1.00 7.00 - 13.00 IV6-1

TABLE IV-6. Department of Energy's Mixed Analyte Performance Evaluation Program (MAPEP)a.

Concentrationb Known Control Lab Code Type Date Analysis Laboratory result Activity Limits' STW-1 026 water 05/01104 U-233/4 0.14 +/- 0.02 0.12 +/- 0.01 0.08 -0.16 STW-1026 water 05/01/04 U-238 0.94 +/- 0.05 0.90 +/- 0.09 0.63 - 1.17 STW-1026 water 05/01/04 Zn-65 219.60 + 27.90 208.00 +/- 20.80 145.60 -270.40 STW-1027 water 05/01/04 Gr. Alpha 1.20 +/- 0.10 1.20 +/- 0.12 0.00 - 2.40 STW-1027 water 05/01/04 Gr. Beta 4.30 +/- 0.10 4.10 +/- 0.41 2.05 - 6.15 a Results obtained by Environmental, Inc. Midwest Laboratory as a participant in the Department of Energy's Mixed Analyte Performance Evaluation Program, Idaho Operations office, Idaho Falls, Idaho b All results are in Bq/kg or Bq/L as requested by the Department of Energy.

c MAPEP results are presented as the known values and expected laboratory precision (1 sigma, 1 determination) and control limits as defined by the MAPEP.

d The cause of the deviation seems to be incomplete dissolution of the sample.

' A spiked soil sample was prepared. Known activity; 32.98 pCi/g; laboratory result 33.47 pCi/g.

'The sample was reanalyzed with the same results. Investigation is in progress.

6 Based on the results of gamma emitting isotopes (Cs-1 37 and Co-60), the filter geometry appears to be biased by -10%. Addition of the summation peak at 1400 KeV results in a recalculation of 2.12 +/- 0.15 Bq/sample.

IV6-2

TABLE IV-7. Environmental Measurements Laboratory Quality Assessment Program (EML)

Concentration" EML Control Lab Code Type Date Analysis Laboratory results Resulte Limits' STW-1009 water 03/01/04 Am-241 1.21 +/- 0.02 1.31 0.66 - 1.56 STW-1009 water 03/01/04 Co-60 152.30 +/- 0.30 163.20 0.87 - 1.17 STW-1009 water 03/01/04 Cs-1 37 50.40 +/- 0.90 51.95 0.90 - 1.25 STW-1 009 water 03/01/04 H-3 263.50 +/- 10.00 186.60 0.69 - 1.91 STW-1 009 water 03/01/04 Pu-238 1.03 +/- 0.04 1.10 0.68 - 1.33 STW-1 009 water 03/01/04 Pu-239140 2.90 +/- 0.10 3.08 0.62 - 1.38 STW-1 009 water 03/01/04 Sr-90 5.20 +/- 0.30 4.76 0.73 - 1.65 STW-1009 water 03/01/04 Uranium 4.35 +/- 0.21 4.62 0.40 - 1.45 STW-1010 water 03/01/04 Gr. Alpha 208.00 +/- 20.70 326.00 0.55 - 1.31 STW-1010 water 03/01/04 Gr. Beta 1063.00 +/- 27.00 1170.00 0.75 - 1.65 STSO-1011 Soil 03/01/04 Am-241 14.10 i4.30 13.00 0.52 - 2.41 STSO-1011 Soil 03/01/04 Cs-1 37 1292.00 i 13.00 1323.00 0.74 - 1.40 STSO-1011 Soil 03/01/04 K-40 563.00 i 83.00 539.00 0.70 - 1.59 STSO-1011 Soil 03/01/04 Pu-239/40 20.70 +/- 1.10 22.82 0.62 - 1.99 STSO-1011 Soil 03/01t04 Sr-90 72.10 i 5.80 51.00 0.58 - 2.96 STSO-1011 Soil 03/01/04 Uranium 139.10 i 10.20 180.22 0.27 - 1.48 STVE-1012 Vegetation 03/01/04 Am-241 4.50 +/- 0.20 4.93 0.58 - 2.86 STVE-1012 Vegetation 03/01/04 Co-60 14.10 i 0.40 14.47 0.64 - 1.49 STVE-1012 Vegetation 03/01/04 Cs-1 37 573.90 +/- 6.00 584.67 0.75 - 1.48 STVE-1012 Vegetation 03/01/04 K-40 709.00 +/- 19.30 720.00 0.45 - 1.51 STVE-1012 Vegetation 03/01/04 Pu-239/40 6.60 +/- 0.50 6.81 0.60 - 1.98 STVE-1012 Vegetation 03/01/04 Sr-90 766.50 +/- 51.30 734.00 0.50 - 1.37 STAP-1013 Air Filter 03/01/04 Am-241 0.11 +/-0.01 0.10 0.62 - 1.93 STAP-1013 Air Filter 03/01/04 Co-60 30.90 +/- 1.08 35.40 0.74 - 1.25 STAP-1013 Air Filter 03/01/04 Cs-1 34 12.30 +/- 1.30 18.20 0.70 - 1.21 STAP-1013 Air Filter 03/01/04 Cs-1 37 24.90 +/- 0.60 26.40 0.72 - 1.32 STAP-1013 Air Filter 03/01/04 Pu-238 0.04 +/- 0.01 0.04 0.61 - 1.55 STAP-1013 Air Filter 03/01/04 Pu-239/40 0.17 +/- 0.02 0.16 0.67 - 1.58 STAP-1013 Air Filter 03/01/04 Sr-90 1.80 +/- 0.20 1.76 0.62 - 2.26 STAP-1013 Air Filter 03/01/04 Uranium 0.17 +/- 0.01 0.17 0.79 - 2.88 STAP-1014 Air Filter 03/01/04 Gr. Alpha 1.09 +/- 0.06 1.20 0.82 - 1.58 STAP-1014 Air Filter 03/01/04 Gr. Beta 2.68 +/- 0.05 2.85 0.75 - 1.94

' Results are reported In Bq/L with the following exceptions: Air Filters (Bq/Filter), Soil and Vegetation (Bq/kg).

b The EML result listed is the mean of replicate determinations for each nuclide +/- the standard error of the mean.

c Control limits are reported by EML as the ratio of Reported Value / EML value.,

d Probable effect of summation peaks and slight difference In filter geometry.

IV7-1