GNRO-2010/00027, 2009 Annual Radiological Environmental Operating Report (AREOR)

2009 Annual Radiological Environmental Operating Report (AREOR)

ML101530580
Person / Time
Site:	Grand Gulf
Issue date:	04/20/2010
From:	Perino C Entergy Operations
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
GNRO-2010/00027
Download: ML101530580 (70)

Text

April 2010 Gulf Nuclear Annual Radiological Environmental Operating Report Grand Gulf Nuclear Station, Unit 1 Docket No. 50-416 License No. NPF-29 Sir or Madam:

In accordance with the Grand Gulf Nuclear Station Unit 1 Technical Specification 5.6.2, attached is the the period January 1 2009 through December 31, 2009.

This letter not contain any commitments.

If you have questions or require additional information concerning these reports, please contact Mr. Richard Scarbrough (601) 437-6978 or Michael Larson at (601) 437-6685.

Sincerely, for C.L. Perino (Corrected copy submitted on June 2, 2010 to correct only the date at the top of the letter. Original letter was submitted with April 20, 2009 date and is filed at NRC ML101130028.)

CLP/MJL

Attachment:

2009 Annual Radiological Environmental Operating Report cc: (See Next Page)

GNRO-2010/00027 Page 2 of 2 cc:

NRC Senior Resident Inspector Grand Gulf Nuclear Station Port Gibson, MS 39150 U.S. Nuclear Regulatory Commission ATTN: Mr. Elmo E. Collins, Jr. (w/2) 612 East Lamar Blvd, Suite 400 Arlington, TX 76011-4005 U. S. Nuclear Regulatory Commission ATTN: Mr. Carl F. Lyon, NRRlADRO/DORL (w/2)

Mail Stop OWFN/8 B1 Washington, DC 20555-0001

ENTERGY OPERATIONS, INC.

GRAND GULF NUCLEAR STATION ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT January 1, 2009-December 31, 2009 Prepared By Reviewed By Approved By

TABLE OF CONTENTS

SUMMARY

6

1.0 INTRODUCTION

11 1.1 Radiological Environmental Monitoring Program 11 1.2 Pathways Monitored 11 1.3 Land Use Census 12 2.0 INTERPRETATION AND TRENDS OF RESULTS 24 2.1 Air Particulate and Radioiodine Sample Results 24 2.2 Thermoluminescent Dosimetry (TLD) Sample Results 24 2.3 Water Sample Results 26 2.4 Sediment Sample Results 26 2.5 Milk Sample Results 26 2.6 Fish Sample Results 27 2.7 Food Product Sample Results 27 2.8 Land Use Census Results 27 2.9 Interlaboratory Comparison Results 34 3.0 RADIOLOGICAL ENVIRONMENTAL MONITORING PROGRAM

SUMMARY

35 3.1 Program Results Summary 35 2

LIST OF TABLES TABLE 1.1 RADIOLOGICAL ENVIRONMENTAL SAMPLING PROGRAM 13 TABLE 2.1 LAND USE CENSUS RESULTS 29 TABLE 3.1 RADIOLOGICAL ENVIRONMENTAL MONITORING 36 PROGRAM

SUMMARY

3

LIST OF FIGURES FIGURE 1-1 EXPOSURE PATHWAYS 21 FIGURE 1-2 SAMPLE COLLECTION SITES - NEAR FIELD 22 FIGURE 1-3 SAMPLE COLLECTION SITES - FAR FIELD 23 FIGURE 2-1 TLD READINGS 25 4

LIST OF ATTACHMENTS ATTACHMENT 1 RADIOLOGICAL MONITORING REPORT 41

SUMMARY

OF MONITORING RESULTS 5

Summary The Annual Radiological Environmental Operating Report presents data obtained through analyses of environmental samples collected for Grand Gulf Nuclear Station's (GGNS)

Radiological Environmental Monitoring Program (REMP) for the period January 1, 2009 through December 31, 2009. This report fulfills the requirements of GGNS Technical Specification 5.6.2.

To supplement the REMP, GGNS personnel collected duplicate surface water, vegetation, and fish samples during the reporting period. Special samples collected during the reporting period included surface water.

Radiological Environmental Monitoring Program GGNS established the REMP in 1978 prior to the station becoming operational (1985) to provide data on background radiation and radioactivity normally present in the area. GGNS has continued to monitor the environment by sampling air, water, sediment, fish and food products, as well as measuring radiation directly. GGNS also samples milk if commercial milk production is occurring within five miles of the plant.

The REMP includes sampling indicator and control locations within an I8-mile radius of the plant. The REMP utilizes indicator locations near the site to show any increases or buildup of radioactivity that might occur due to station operation, and control locations farther away from the site to indicate the presence of only naturally occurring radioactivity. GGNS personnel compare indicator results with control and preoperational results to assess any impact GGNS operation might have had on the surrounding environment.

In the current year, GGNS personnel collected environmental samples for radiological analysis. They compared results of indicator locations with control locations and previous studies, and concluded that overall no significant relationship exists between GGNS operation and effect on the plant environs. Their review of current year data, in many cases, showed undetectable radiation levels in the environment and near background level in significant pathways associated with GGNS.

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Harmful Effects or Irreversible Damage The REMP monitoring did not detect any harmful effects or evidence of irreversible damage in the current year. Therefore, no analysis or planned course of action to alleviate problems was necessary.

Reporting Levels GGNS' review indicates that no samples equaled or exceeded reporting levels for radioactivity concentration in environmental samples, as outlined in aDCM Specifications Table 6.12.1-2 when averaged over any calendar quarter, due to GGNS effluents. Therefore, results did not trigger any Radiological Monitoring Program Special Reports.

Radioactivity Not Attributable to GGNS In previous years, the GGNS REMP detected radioactivity attributable to other sources twice.

These include the Chinese nuclear test explosion in 1980, and the radioactive release due to reactor core degradation at the Chemobyl Nuclear Power Plant in 1986.

Comparison to Federal and State Programs GGNS personnel compared REMP data to federal and state monitoring programs as results became available. Historically, the programs used for comparison have included the U.S.

Nuclear Regulatory Commission (NRC) Thermoluminescent Dosimeter (TLD) Direct Radiation Monitoring Network and the Mississippi State Department of Health (MSDH),

Division of Radiological Health.

The NRC TLD Network Program was discontinued in 1998. Historically these results compared favorably to those from the GGNS REMP.

The MSDH and the GGNS REMP have similar radiological environmental monitoring program requirements. These programs include concurrent air sampling and sharing sample media such as water, sediment, fish and food products. Both programs have obtained similar results. The results of MSDH's monitoring program for the reporting period compared favorably with the GGNS REMP and did not indicate elevated levels of radiation or radioactivity build-up attributed to plant operations.

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Sample Deviations

• Milk The REMP did not include milk sampling within five miles (8 km) of GGNS in the current year due to unavailability. ODCM Specifications require collection of milk samples if available commercially within 8 km (5 miles) of the plant. GGNS personnel collected vegetation samples to monitor the ingestion pathway, as specified in ODCM Specifications Table 6.12.1-1, because of milk unavailability.

• Required Lower Limit of Detection (LLD) Values AS-1 PG did not meet the LLD requirement for the sample period of 3/24/09 - 3/25/09 due to the low sample collection time. Deviations in the Radiological Environmental Monitoring Program are addressed in ODCM Table 6.12.1-3. "Occasionally background fluctuations, unavoidable small sample size, the presence of interfering nuclides, or other uncontrollable circumstances may render these LLDs unachievable".

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• Air Samples The following air sample locations had reduced run times due to weather-related outages or mechanical problems. As described in footnote (a) to aDeM Specification Table 6.12.1-1, deviations from the required sampling schedule are permitted due to malfunction of sampling equipment and other legitimate reasons.

Sample Date In Date Out Run Time Out-of- Comments Location Hours service hours AS-1 PG 3/10/09 3/17/09 136.99 26 Equipment Failure AS-1 PG 3/17/09 3/24/09 14.70 157~57 Equipment Failure AS-1 PG 3/24/09 3/25/09 5.03 15.47 Equipment Failure AS-7 UH 3/24/09 3/31/09 162.93 2.65 Power Outaae AS-361VA 8/11/09 8/18/09 167.98 0.48 Power Outage AS-7 UH 10/13/09 10/20/09 166.98 5.55 Power Outaae AS-361VA 12/14/09 12/21/09 162.21 5.72 Power Outage AS-7 UH 12/22/09 12/29/09 160.41 7.3 Power Outaae AS-361VA 12/21/09 12/28/09 168.11 0.22 Power Outage Based on the sample collection period reductions, air samples were collected the following percentages of the available time:

AS-1 PG 97.7%

AS-361VA 99.9%

AS-7 UH 99.8%

• Missed Samples All required samples were collected in accordance with REMP requirements. No samples were missed.

• Unavailable Results GGNS received analytical results in adequate time for inclusion in this report. In addition, GGNS' review identified no missing results.

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Program Modifications No REMP modifications took place during this sampling period.

Attachments contains results of TLD, air, water, sediment, fish, food products and special samples collected. TLDs were analyzed by AREVA NP Inc.. All other samples were analyzed by River Bend Station's (RBS) Environmental Laboratory. Attachment 1 also contains RBS' results from participation in the interlaboratory comparison program.

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1.0 Introduction 1.1 Radiological Environmental Monitoring Program GGNS established the REMP to ensure that plant operating controls properly function to minimize any associated radiation endangerment to human health or the environment. The REMP is designed for:

• Analyzing important pathways for anticipated types and quantities of radionuc1ides released into the environment.

• Considering the possibility of a buildup of long-lived radionuc1ides in the environment and identifying physical and biological accumulations that may contribute to human exposures.

• Considering the potential radiation exposure to plant and animal life In the environment surrounding GGNS.

• Correlating levels of radiation and radioactivity In the environment with radioactive releases from station operation.

1.2 Pathways Monitored The airborne, direct radiation, waterborne and ingestion pathways, as seen in Figure 1-1, are monitored as required by GGNS aDeM Table 6.12.1-1. A description of the GGNS REMP utilized to monitor the exposure pathways is provided in Table 1.1 and shown in Figures 1-2 and 1-3. GGNS may supplement this program with additional sampling in order to provide a comprehensive and well-balanced program.

Section 2.0 of this report provides a discussion of sampling results with Section 3.0 providing a summary of results for the monitored exposure pathways.

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1.3 Land Use Census GGNS personnel conduct a land use census biannually, as required by aDCM Specification 6.12.2. Data for the most recent land use census is included. The purpose of this census is to identify changes in uses of land within five miles of GGNS that would require modifications to the REMP or the aDCM The most important criteria during this census are to determine location in each sector of the nearest:

1) Residence

2) Animal milked for human consumption 2 2 .

3) Garden of greater than 50 m (500 ft ) producIng broadleafvegetation.

GGNS personnel conduct the land use census by:

• Conducting Field surveys in each meteorological sector out to five miles in order to confirm:

~ Nearest permanent residence

~ Nearest unoccupied residence

~ Nearest garden and approximate size

~ Nearest milking animal.

• Identifying locations on maps, measuring distances to GGNS and recording results on surveillance data sheets.

• Comparing current land use census results to previous results.

• Contacting the Claiborne County Agent for verification of nearest dairy animals.

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Table 1.1 Radiological Environmental Sampling Program Exposure Requirement Sample Point Description, Sampling and Type and Frequency Pathway Distance and Direction Collection Frequency Of Analyses Airborne Radioiodine and Particulates 1 sample close to the SITE AS-7 UH (Sector H, Radius 0.5 Miles) - Continuous sampler operation Radioiodine Cannister 131; BOUNDARY having the highest South-southeast of GGNS at the IBEW with sample collection per 7 7 days calculated annual average Union Hall.

days or as required by dust groundlevel 0/0.

loading, whichever is more Particulate Sampler - Gross frequent beta radioactivity following filter change, composite (by location) for gamma isotopic; 92 days Radioiodine and Particulates 1 sample from the vicinity of a AS-1 PG (Sector G, Radius 5.5 Miles) -

community having the highest Southeast of GGNS at the Port Gibson City calculated annual average Barn.

groundlevel 0/0.

Radioiodine and Particulates AS-3 61VA (Sector B, Radius 18 Miles)-

1 sample from a control location 15 - North-northeast of GGNS on Hwy 61, 30 km (10 - 20 miles) distance. North of the Vicksburg Airport.

Direct TLDs Radiation An inner ring of stations in the M-16 (Sector A, Radius 0.9 Miles) - 92 days Gamma dose; 92 days general areas of the SITE Meteorological Tower.

BOUNDARY.

M-17 (Sector C, Radius 0.5 Miles) -

South Side, Grand Gulf Road.

M-19 (Sector E, Radius 0.5 Miles) -

Eastern SITE BOUNDARY Property line, North-northeast of HWSA.

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Table 1.1 Radiological Environmental Sampling Program Exposure Requirement Sample Point Description, Sampling and Type and Frequency Pathway Distance and Direction Collection Frequency Of Analyses Direct TLDs Radiation An inner ring of stations in the M-21 (Sector J, Radius 0.4 Miles) - Near 92 days Gamma dose; 92 days general areas of the SITE Former Training Center Building on Bald BOUNDARY. Hill Road.

M-22 (Sector G, Radius 0.5 Miles) -

Former RR Entrance Crossing On Bald Hill Road.

M-23 (Sector Q, Radius 0.5 Miles) - Gin Lake Road 50 Yards North of Heavy Haul Road on Power Pole.

M-25 (Sector N, Radius 1.6 Miles) -

Radial Well Number 1.

M-28 (Sector L, Radius 0.9 Miles) -

Former Residence.

M-94 (Sector R, Radius 0.8 Miles) -

Sector R Near Meteorological Tower.

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Table 1..1 Radiological Environmental Sampling Program Exposure Requirement Sample Point Description, Sampling and Type and Frequency Pathway Distance and Direction Collection Frequency Of Analyses Direct TLDs Radiation An inner ring of stations in the M-95 (Sector F, Radius 0.5 mi) - Spoils 92 days Gamma dose; 92 days general areas of the SITE Area, fence of old storage area, near BOUNDARY. entrance gate M-96 (Sector B, Radius 0.7 mi.) - North Gate Fence M-97 (Sector 0, Radius 0.8 mi.) - Grand Gulf Road entrance gate to spoils area M-98 (Sector H, Radius 0.5 mi.) - Bald Hill Road, across form Union Hall in curve M-99 (Sector K, Radius 0.4 mi.) - North Fence of old Ball Field near utility pole M-100 (Sector C, Radius 0.6 mi.) - Grand Gulf Road TLDs An outer ring approximately 3 to 5 M-36 (Sector P, Radius 5.0 Miles) -

miles from the site. Curve on HW 608, Point Nearest GGNS at Power Pole.

M-40 (Sector M, Radius 2.3 Miles) -

Headly Drive, Near River Port Entrance.

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Table 1.1 Radiological Environmental Sampling Program Exposure Requirement Sample Point Description, Sampling and Type and Frequency Pathway Distance and Direction Collection Frequency Of Analyses Direct TLDs Radiation An outer ring approximately 3 to 5 M-48 (Sector K, Radius 4.8 Miles) - 0.4 Miles 92 days Gamma dose; 92 days miles from the site. South on Mont Gomer Road on West Side.

M-49 (Sector H, Radius 4.5 Miles) - Fork in Bessie Weathers Road/Shaifer Road.

M-50 (Sector B, Radius 5.3 Miles) - Panola Hunting Club Entrance.

M-55 (Sector D, Radius 5.0 Miles) - Near Ingelside Karnac Ferry Road/Ashland Road Intersection.

M-57 (Sector F, Radius 4.5 Miles) - Hwy 61, Behind the Welcome to Port Gibson Sign at Glensdale Subdivision.

TLDs 8 stations in special interest areas M-01 (Sector E, Radius 3.5 Miles) - Across the such as population centers, nearby road from Lake Claiborne Entry Gate. (Special residences, schools, and in 1 or 2 Interest) areas to serve as control stations.

M-Q7 (Sector G, Radius 5.5 Miles) - AS-1 PG, Port Gibson City Barn. (Special Interest)

M-09 (Sector D, Radius 3.5 Miles) - Warner Tully V-Camp. (Special Interest)

M-10 (Sector A, Radius 1.5 Miles) - Grand Gulf Military Park. (Special Interest) 16

Table 1.1 Radiological Environmental Sampling Program Exposure Requirement Sample Point Description, Sampling and Type and Frequency Pathway Distance and Direction Collection Frequency Of Analyses Direct TLDs Radiation 8 stations in special interest areas M-14 (Sector B, Radius 18.0 Miles) - AS 92 days Gamma dose; 92 days such as population centers, nearby 61 VA, Hwy 61, North of Vicksburg Airport.

residences, schools, and in 1 or 2 (Control) areas to serve as control stations M-33 (Sector P, Radius 12.5 Miles) -

Newellton, Louisiana Water Tower. (Special Interest)

M-38 (Sector M, Radius 9.5 Miles) - Lake Bruin State Park, Entrance Road. (Special Interest)

M-39 (Sector M, Radius 13.0 Miles) - St.

Joseph, Louisiana, Auxiliary Water Tank.

(Special Interest) 17

Table 1.1 Radiological Environmental Sampling Program Exposure Requirement Sample Point Description, Sampling and Type and Frequency Pathway Distance and Direction Collection Frequency Of Analyses Waterborne Surface Water 1 sample upstream. MRUP (Sector R, Radius 1.8 Miles) - At least 4500 92 days Gamma isotopic and tritium ft upstream of the GGNS discharge point into the analyses; 92 days Mississippi River to allow adequate mixing of the Mississippi and Big Black Rivers.

1 sample downstream. MRDOWN (Sector N, Radius 1.6 Miles) - At least 5000 ft downstream of the GGNS discharge point into the Mississippi River near Radial Well No.1.

1 sample downstream during a Liquid MRDOWN (Sector P, Radius 1.3 Miles) - 366 days Gamma isotopic and tritium Radwaste Discharge. Downstream of the GGNS discharge point into the analyses; 366 days Mississippi River near Radial Well No.5.

1 sample from Outfall 007 OUTFALL 007 (Sector N, Radius 0.2 Miles) - Storm 31 days Tritium; 31 days Drain System 18

Table 1.1 Radiological Environmental Sampling Program Exposure Requirement Sample Point Description, Sampling and Type and Frequency Pathway Distance and Direction Collection Frequency Of Analyses Waterborne Groundwater Samples from 2 sources. PGWELL (Sector G, Radius 5.0 Miles) - 366 days Gamma isotopic and tritium Port Gibson Wells - Take from distribution analyses; 366 days system or one of the five wells.

CONSTWELL (Sector Q, Radius 0.4 Miles)

- GGNS Construction Water Well - Taken from distribution system or the well.

Sediment From Shoreline 1 sample from downstream area. SEDHAM (Sector N, Radius 1.6 Miles) - 366 days Gamma isotopic; 366 days Downstream of the GGNS discharge point in the Mississippi River near Hamilton Lake outlet.

1 sample from upstream area. SEDCONT (Minimum of 100 yds) -

Upstream of the GGNS discharge point in the Mississippi River.

Ingestion Milk 1 sample from milking animals within 8 Currently, no available milking animals within 92 days when required Gamma isotopic and 1-131; 92 km if milk is available commercially. 8 km ofGGNS.

days 1 control sample (only if indicator ALCONT (Sector K, Radius 10.5 Miles) -

exists) >8 km if milk is available. Located South-southwest of GGNS at Alcorn State University.

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Table 1.1 Radiological Environmental Sampling Program Exposure Requirement Sample Point Description, Sampling and Type and Frequency Pathway Distance and Direction Collection Frequency Of Analyses Ingestion Fish 1 sample in vicinity of GGNS FISHDOWN - Downstream of the GGNS 366 days Gamma isotopic on edible discharge point. discharge point into the Mississippi River portion; 366 days 1 sample uninfluenced by GGNS FISHUP - Upstream of the GGNS discharge discharge. point in the Mississippi River uninfluenced by plant operations.

Food Products 1 sample of broadleaf vegetation VEG-J (Sector J, Radius 0.4 Miles) - South 92 days when available Gamma isotopic and 1-131; 92 grown in one of two different offsite of GGNS near former Training Center on days locations with highest anticipated Bald Hill Road.

annual average ground level D/Q if milk sampling is not performed.

1 sample of similar vegetation grown VEG-CONT (Sector K, Radius 10.5 Miles) -

15 - 30 km distant if milk sampling is Alcorn State University south-southwest of not performed. GGNS when available, otherwise a location 15-30 km distant.

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FIGURE 1-1 Exposure Pathways

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~ ~ - -

--=--~ . - ----- - ~ ---

21

FIGURE 1-2 SAMPLE COLLECTION SITES - NEAR FIELD FIGURE 3.0-1 Collection Site Locations 0-4 Mile Area Map LEGEND P Fish o Air Sampler

) Surface Waler A Groond Waler o l?!Oadleaf Vegetation

• Sediment OTlO Ranney Wells

- . Milk ENTERGY GRANO GUlf NUClEAR STATION

(}."! Mile EfWiloomantlll SIlmpllng l.ocation Map I ~ 0 1

~ j SCAl.E IN MILES Grund Cl.III,Unil1 3.()'--7 Revision 37 02/09 22

FIGURE 1-3 SAMPLE COLLECTION SITES - FAR FIELD FIGURE 3.0-2 Collection Site Locations, General Area Map 4-10 Mile Area Map I

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• E fllTERCY GRANO GUlF NUClEAR STATtON 4-10 Milt) Enviroornental Sampling l.ocation Map Grand Gulf, Unit 1 3,(H3 Revision 35 0007 23

2.0 Interpretation and Trends of Results 2.1 Air Particulate and Radioiodine Sample Results GGNS did not detect any plant related gamma emitting radionuclides in the quarterly air particulate composites or Iodine-131 in the radioiodine cartridges during the reporting period, as has been the case in previous years. The REMP detected radioactivity in this pathway attributable to other sources twice. These include the Chinese nuclear test in 1980, and the radioactive release due to reactor core degradation at Chernobyl Nuclear Power Plant in 1986. Therefore, the airborne exposure pathway has been unaffected by the operation of GGNS and airborne concentrations continue to be at background levels.

Table 3.1, which includes gross beta concentrations, provides a comparison of the indicator and control means and ranges, further emphasizes that the airborne pathway continues to remain at background levels. In the absence of plant-related gamma radionuclides, gross beta activity is attributed to naturally occurring radionuclides.

Similar trends are present for control and indicator locations. This supports the presence of naturally occurring activity.

2.2 Thermoluminescent Dosimetry Sample Results GGNS calculates dose by subtracting shield readings from control and indicator location readings and reports measured dose as net exposure normalized to 92 days.

GGNS relies on comparison of the indicator locations to the control location as a measure of plant impact. Gamma radiation dose in the reporting period is compared to control location readings for previous years as shown in Figure 2-1.

GGNS' comparison of the indicator results to the control and to previous indicator results, as seen in Figure 2-1 and Table 3.1, indicates that plant operations had no significant impact on ambient radiation levels during the reporting period.

With the exception of TLD locations M-21 (Sector J, 0.4 miles), M-98 (Sector H 0.5 miles and M-99 (Sector K, 0.4 miles) direct radiation levels continue to remain at or near background. The dose rate at these three locations is a result of increased Nitrogen-16 levels associated with hydrogen injection. Hydrogen injection into the feedwater system provides protection against Intergranular Stress Corrosion of plant components.

Dose rates at locations M-21 [5.7 millirem per quarter], M-98 [2.0 millirem per quarter]

and M-99 [5.0 millirem per quarter] above Control location M-14 (sector B, 18.0 miles) remain well below the limitations of 10CFR20.1301(a)(2) and 10CFR 20. 1302(b)(2)(ii).

24

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2.3 Water Sample Results Surface water samples were collected from three indicator locations (Outfall 007, MRDOWN, and MRDOWN During Discharge) and one control location (MRUP) and analyzed for gamma emitting radionuclides and tritium. Plant related gamma emitting radionuclides and tritium remained undetectable in the upstream and downstream Mississippi River locations, which is consistent with preoperational and previous operational years. Storm waters contribute to Outfall 007 and can include tritium as a result of washout and entrainment of routine, previously monitored gaseous effluents.

As a result, tritium is occasionally observed. When detected, tritium was measured at an average (one sample) concentration of 902 +/- 258 pCi/L in the Outfall 007 (indicator) location.

In addition to the tritium samples required by the REMP, five special surface water samples for gamma were collected at the Outfall 007 location. Plant related gamma emitting radionuclides remained undetectable in these samples.

Based on review of results and historical data, GGNS concluded that plant operations had no significant impact on this pathway during the reporting period.

Groundwater samples were collected from two locations (indicator and control) and analyzed for gamma emitting radionuclides and tritium. GGNS did not detect any plant related gamma emitting radionuclides or tritium in groundwater samples during the reporting period.

Based on review of results and historical data, GGNS concluded that plant operations had no significant impact on this pathway during the reporting period.

2.4 Sediment Sample Results Sediment samples were collected from two ODCM Specification locations (indicator and control) and analyzed for gamma emitting radionuclides. In this reporting period, plant related gamma emitting radionuclides were below detectable concentrations in the upstream (control) and downstream (indicator) locations.

Based on review of results and historical data, GGNS concluded that plant operations had no significant impact on this pathway during the reporting period.

2.5 Milk Sample Results GGNS personnel did not collect milk samples within five miles of the site in the reporting period due to the absence of milking animals. Since there are no dairies within five miles of GGNS, and based on non-detectable radioiodine in air and vegetation samples, it is concluded GGNS' operation had no impact on this pathway.

26

2.6 Fish Sample Results Fish samples were collected from two locations (indicator and control) and analyzed for gamma emitting radionuclides. GGNS did not detect any plant related gamma emitting radionuclides in fish samples (edible portions) during the reporting period, as has been the case in preoperational and previous operational years. These results indicate that this pathway has not been affected by plant operations.

2.7 Food Product (Vegetation) Sample Results Food product samples were collected from control and indicator locations when available and analyzed for gamma emitting radionuclides. GGNS did not detect any plant related gamma emitting radionuclides in vegetation samples during the reporting period. Nuclides detected previously at the control and indicator locations are attributed to the Chernobyl release and atmospheric weapons testing. These results indicate that this pathway has not been affected by plant operations.

2.8 Land Use Census Results Results from the Land Use Census performed April 9-14, 2008 are included in this report. Methods utilized include: visual surveys, door to door surveys, telephone interviews, GPS, Aerial Photography, and consultation with the local county agent concerning dairy production in Claiborne County.

During the survey the following questions were asked:

1) Name of occupant

2) Address

3) Number of people residing at residence

4) Age group of occupants

5) Any farm animal raised for human consumption

6) Any dairy production

7) Maintain a garden Changes from the previous Land Use Census were evaluated in accordance with GGNS surveillance 06-EN-SOOO-0-0002. The differences were compared to the locations and assumptions used in calculations for compliance with the Offsite Dose Calculation Manual (ODCM), LCO 6.11.6. It was determined that the locations and assumptions currently used in ODCM are more conservative than any of the changes.

Determinations from the most recent Land Use Census results are:

27

• One unoccupied location in the previous land use census is now occupied, sector E (East) at 0.83 miles, which becomes the nearest occupied residence. Because of downwind location and/or distance from the site, the occupancy of an existing unoccupied residence will not cause any ODCM critical receptor calculation results to be less conservative.

• No additional sampling locations are required as the onsite vegetation sampling location (Sector J, 0.4 miles) is more conservative than changes identified in the land use census.

• Cattle are raised for human consumption (most notably Sector H, J, and K).

GGNS uses the Grass/Cow/Meat pathway.

• The milk pathway does not need to be activated because no commercial dairy production is occurring within 5 miles.

• Sectors M, N, P, and Q are remote areas in which the primary use is hunting.

Area was surveyed by vehicle and aerial photographs. Also, all areas in Louisiana within 5 miles belong to a private hunting club with no permanent residence or garden receptor.

• Gardens, regardless of size, were included in the census data.

28

Table 2.1 Land Use Census Results Parameter Sector A Sector B* Sector C Sector D I. Nearest Occupied a. Distance (mile) 0.98 0.83 0.67 2.57 Residence b. Number of Occupants 2 2 2 6

c. Degrees from true north 354.0 15.1 42.1 60.5 II. Nearest Unoccupied a. Distance (mile) 0.94 None None None Residence (closer than occupied residence)

III. Nearest Milk Animal a. Distance None None None None IV. Nearest Broadleaf a. Distance (mile) 1.78 1.52 0.67 2.86 Garden b. Garden size (ft2) ~ 1200 ~4050 ~ 1250 ~500

c. Degrees from true north 352.2 21.9 42.1 59.7 V. Census Comparison a. Is nearest occupied residence in same location as last census? Yes Yes Yes Yes

b. Is nearest milk animal in same location as last census? N/A N/A N/A N/A

c. Is nearest broadleaf garden in same location as last census? Yes Yes Yes Yes

• Change from last census, see attached table of Land Use Census Changes 29

Table 2.1 Land Use Census Results Parameter Sector E

• Sector F

• Sector G Sector H I. Nearest Occupied a. Distance (mile) 0.83 2.25 2.10 1.11 Residence b. Number of Occupants 1 1 3 6

c. Degrees from true north 95.1 101.5 129.7 152.5 II. Nearest Unoccupied a. Distance (mile) None None 1.93 1.08 Residence (closer than occupied residence)

III. Nearest Milk Animal a. Distance None None None None IV. Nearest Broadleaf a. Distance (mile) 0.89 4.05 3.81 1.11 Garden b. Garden size (ft2) ~1000 ~50 ~1600 ~500

c. Degrees from true north 86.9 114.3 129.1 152.5 V. Census Comparison a. Is nearest occupied residence in same location as last census? No Yes Yes Yes

b. Is nearest milk animal in same location as last census? N/A N/A N/A N/A

c. Is nearest broadleaf garden in same location as last census? Yes Yes Yes Yes

• Change from last census, see attached table of Land Use Census Changes 30

Table 2.1 Land Use Census Results Parameter Sector J Sector K Sector L SectorM I. Nearest Occupied a. Distance (mile) 3.16 2.23 0.89 None Residence b. Number of Occupants 2 1 2

c. Degrees from true north 174.3 196.9 219.7 II. Nearest a. Distance (mile) None None None None UnoccupiedResidence (closer than occupied residence)

III. Nearest Milk Animal a. Distance None None None None IV. Nearest Broadleaf a. Distance (mile) 3.16 2.23 0.89 None Garden b. Garden size (ft2) ~500 ~2500 ~300

c. Degrees from true north 174.3 196.9 219.7 V. Census Comparison a. Is nearest occupied residence in same location as last census? Yes Yes Yes N/A

b. Is nearest milk animal in same location as last census? N/A N/A N/A N/A

c. Is nearest broadleaf garden in same location as last census? Yes Yes Yes N/A

• Change from last census, see attached table of Land Use Census Changes 31

Table 2.1 Land Use Census Results Parameter Sector N Sector P Sector Q Sector R I. Nearest Occupied a. Distance (mile) None None None 1.11 Residence b. Number of Occupants 2

c. Degrees from true north 346.1 II. Nearest a. Distance (mile) 1.61 4.83 3.5 None UnoccupiedResidence (closer than occupied residence)

III. Nearest Milk Animal a. Distance None None None None IV. Nearest Broadleaf a. Distance (mile) None None None 1.46 Garden b. Garden size (ft2) ~4000

c. Degrees from true north 342.9 V. Census Comparison a. Is nearest occupied residence in same location as last census? N/A N/A N/A Yes

b. Is nearest milk animal in same location as last census? N/A N/A N/A N/A

c. Is nearest broadleaf garden in same location as last census? N/A N/A N/A Yes

• Change from last census, see attached table of Land Use Census Changes 32

Land Use Census Changes SECTOR PARAMETER Reason for Change B Nearest Broadleaf Garden Clarification of address E Nearest Occupied Residence Residence is now occupied E Nearest Unoccupied Residence is now occupied by different individual. No Residence house is unoccupied closer than occupied residence in this sector.

F Nearest Occupied Residence Residence is now occupied by different individual 33

2.9 Interlaboratory Comparison Results River Bend Station (RBS) Environmental Laboratory analyzed interlaboratory comparison samples to fulfill the requirements of the aDeM Specifications 6.12.1. , Radiological Environmental Monitoring Report, contains these results in Table 9.1. GGNS' review of RBS' interlaboratory comparison indicated that 100%

of results were within control limits for accuracy, and 100% of results were within control limits for precision.

34

3.0 Radiological Environmental Monitoring Program Summary 3.1 Program Results Summary Table 3.1 summarizes the REMP results. GGNS personnel did not use values reported as less than the lower limit of detection <<LLD) when determining ranges and means for indicator and control locations.

35

TABLE 3.1 Radiological Environmental Monitoring Program Summary Name of Facility: Grand Gulf Nuclear Station Docket No: 50-416 Location of Facility: Claiborne County, Mississippi Reporting Period: January - December 2009 Sample Type Type & Number LLDb Indicator Locations Location with Highest Annual Mean Control Locations Number of (Units) of Analyses a Mean (F) c Mean (F) c Nonroutine

[Range] [Range] Results e Mean (F) c Location d [Ranee]

Air Particulates GB 157 0.01 0.024 ( 1051 105 ) AS-3 VA 0.026 ( 52 152 ) 0.026 ( 52 152 ) 0 (pCi/m3 ) [ 0.009 - 0.049 ] (Sector B, 18 mi) [ 0.012 - 0.055 ] [ 0.012- 0.055 ]

GS 12 Cs-134 0.05 <LLD N/A N/A <LLD 0 Cs-137 0.06 <LLD N/A N/A <LLD 0 Airborne Iodine 1-131 157 0.07 <LLD N/A N/A <LLD 0 (pCi/m3 )

Inner Ring TLDs Gamma 56 (f) 10.9 ( 56/56 ) M-21 17.0 ( 4 ! 4 ) N/A 0 (mRlQtr) [ 5.6-18.4 ] (Sector K, 0.4 mi.) [ 15.7-18.4 ]

Outer Ring TLDs Gamma 28 (f) 10.2 ( 28 128 ) M-55 12.3 ( 4 14) N/A 0 (mRlQtr) [ 5.3 - 12.8 ] (Sector D, 5.0 mi.) [ 11.7-12.8 ]

Special Interest TLDs Gamma 28 (f) 9.9 (28/28) M-Ol 11.9(4/4) N/A 0 (mRlQtr) [7.9 -12.6] (Sector E, 3.5 mi. ) [ 11.3-12.6 ]

Control TLDs Gamma 4 (f) N/A N/A N/A 11.3(4/4) 0 (mRlQtr) [ 10.5-12.2]

36

TABLE 3.1 Radiological Environmental Monitoring Program Summary Name of Facility: Grand Gulf Nuclear Station Docket No: 50-416 Location of Facility: Claiborne County, Mississippi Reporting Period: January - December 2009 Sample Type Type & Number LLDb Indicator Location Location with Highest Annual Mean Control Locations Number of (Units) of Analyses a Mean (F) c Mean (F) c Nonroutine

[Range] [Range] Results e Mean (F) c Location d r Ra n 2 e ]

Surface Water H-3 28 3000 909 ( 1/23 ) Outfall 007 909 ( 1 / 15 ) <LLD 0 (pCi/l ) [909 ] ( Sector N, Radius 0.2 mi.) [909]

GS 13 1-131 15 <LLD N/A N/A <LLD 0 Mn-54 15 <LLD N/A N/A <LLD 0 Fe-59 30 <LLD N/A N/A <LLD 0 Co-58 15 <LLD N/A N/A <LLD 0 Co-60 15 <LLD N/A N/A <LLD 0 Zn-65 30 <LLD N/A N/A <LLD 0 Zr-95 30 <LLD N/A N/A <LLD 0 Nb-95 15 <LLD N/A N/A <LLD 0 Cs-134 15 <LLD N/A N/A <LLD 0 Cs-137 18 <LLD N/A N/A <LLD 0 Ba-140 60 <LLD N/A N/A <LLD 0 La-140 15 <LLD N/A N/A <LLD 0 37

TABLE 3.1 Radiological Environmental Monitoring Program Summary Name of Facility: Grand Gulf Nuclear Station Docket No: 50-416 Location of Facility: Claiborne County, Mississippi Reporting Period: January - December 2009 Sample Type Type & Number LLDb Indicator Locations Location with Highest Annual Mean Control Locations Number of (Units) of Analyses a Mean (F) c Mean(F) c Nonroutine

[Range] [Range] Results e Mean (F) c Location d [Ran2e]

Groundwater H-3 2 2000 <LLD N/A N/A <LLD 0 (pCi/1 )

1-131 2 1 <LLD N/A N/A <LLD 0 GS 2 Mn-54 15 <LLD N/A N/A <LLD 0 Fe-59 30 <LLD N/A N/A <LLD 0 Co-58 15 <LLD N/A N/A <LLD 0 Co-60 15 <LLD N/A N/A <LLD 0 Zn-65 30 <LLD N/A N/A <LLD 0 Zr-95 30 <LLD N/A N/A <LLD 0 Nb-95 15 <LLD N/A N/A <LLD 0 Cs-134 15 <LLD N/A N/A <LLD 0 Cs-137 18 <LLD N/A N/A <LLD 0 Ba-140 60 <LLD N/A N/A <LLD 0 La-140 15 <LLD N/A N/A <LLD 0 Sediment GS 2 (pCi/kg)

Cs-134 150 <LLD N/A N/A <LLD 0 Cs-137 180 <LLD N/A N/A <LLD 0 38

TABLE 3.1 Radiological Environmental Monitoring Program Summary Name of Facility: Grand Gulf Nuclear Station Docket No: 50-416 Location of Facility: Claiborne County, Mississippi Reporting Period: January - December 2009 Sample Type Type & Number LLDb Indicator Location Location with Highest Annual Mean Control Locations Number of (Units) of Analyses a Mean (F) c Mean (F) c Nonroutine

[Range] [Range] Results e Mean (F) c Location d [Ran2e]

Fish GS 4 (pCi/kg) Mn-54 130 <LLD N/A N/A <LLD 0 Fe-59 260 <LLD N/A N/A <LLD 0 Co-58 130 <LLD N/A N/A <LLD 0 Co-60 130 <LLD N/A N/A <LLD 0 Zn-65 260 <LLD N/A N/A <LLD 0 Cs-134 130 <LLD N/A N/A <LLD 0 Cs-137 150 <LLD N/A N/A <LLD 0 Food 1-131 10 60 <LLD N/A N/A <LLD 0 ProductsNegetation (pCilkg ) GS 10 Cs-134 60 <LLD N/A N/A <LLD 0 Cs-137 80 <LLD N/A N/A <LLD 0 39

TABLE 3.1 Radiological Environmental Monitoring Program Summary Name of Facility: Grand Gulf Nuclear Station Docket No: 50-416 Location of Facility: Claiborne County, Mississippi Reporting Period: January - December 2009 Sample Type Type & Number LLDb Indicator Location Location with Highest Annual Mean Control Locations Number of (Units) of Analyses a Mean (F) c Mean (F) c Nonroutine

[Range] [Range] Results e Mean (F) c Location d [Range]

Surface Water GS 5 (Special) 1-131 15 <LLD N/A N/A <LLD 0 (pCi/l ) Mn-54 15 <LLD N/A N/A <LLD 0 Fe-59 30 <LLD N/A N/A <LLD 0 Co-58 15 <LLD N/A N/A <LLD 0 Co-60 15 <LLD N/A N/A <LLD 0 Zn**(j5 30 <LLD N/A N/A <LLD 0 Zr-95 30 <LLD N/A N/A <LLD 0 Nb-95 15 <LLD N/A N/A <LLD 0 Cs-134 15 <LLD N/A N/A <LLD 0 Cs-137 18 <LLD N/A N/A <LLD 0 Ba-140 60 <LLD N/A N/A <LLD 0 La-140 15 <LLD N/A N/A <LLD 0 a GB = Gross beta; 1-131 = Iodine-131; H-3 = Tritium; GS = Gamma scan.

b LLD = Required lower limit of detection based on GGNS ODCM Table 6.12.1-3.

c Mean and range based upon detectable measurements only. Fraction of detectable measurements at specified locations is indicated in parenthesis (F).

d Where applicable, locations are specified by name, distance from reactor site and meteorological sector.

e Non-routine results are those which exceed ten times the control station value. If no control station value is available, the result is considered non-routine if it exceeds ten times the preoperational value for the location.

f LLD is not defined in GGNS ODCM Table 6.12.1-3.

40

Attachment 1 Radiological Monitoring Report Summary of Monitoring Results 41

TABLE OF CONTENTS TABLE 1.1 AIR PARTICULATE FILTER GROSS BETA AND 43 CHARCOAL CARTRIDGE IODINE*131 TABLE 1.2 AIR PARTICULATE FILTER GAMMA 52 TABLE 2.1 THERMOLUMINESCENT DOSIMETERS 53 TABLE 2.2 THERMOLUMINESCENT DOSIMETERS 54 TABLE 2.3 THERMOLUMINESCENT DOSIMETERS 55 TABLE 3.1 SURFACE WATER GAMMA 56 TABLE 3.2 SURFACE WATER TRITIUM 58 TABLE 4.1 GROUNDWATER GAMMA 59 TABLE 4.2 GROUNDWATER TRITIUM 60 TABLE 4.3 GROUNDWATER IODINE*131 61 TABLE 5.1 SEDIMENT 62 TABLE 6.1 FISH 63 TABLE 7.1 FOOD PRODUCTS 64 TABLE 8.1 SPECIAL SAMPLES 65 TABLE 9.1 INTERLABORATORY COMPARISON 66 42

Table 1.1 Sample Type: Air Particulate Filter and Radioiodine Cartridge Analysis: Gross Beta and 1-131 Units: pei/m3 AIR SAMPLE AS-! PG - GGNS Nearest Community LLD (pCilm"3) AS-l PG 0.07 0.01 LABID START DATE END DATE 1-131 GROSS BETA 20090003 12/3012008 116/2009 < 0.015 0.025 +/- 0.0010 20090057 11612009 1113/2009 < 0.024 0.034 +/- 0.001 20090063 111312009 112012009 < 0.017 0.029 +/- 0.0010 20090084 112012009 112712009 < 0.016 0.034 +/- 0.0011 20090098 1127/2009 2/312009 < 0.016 0.025 +1- 0.0011 20090126 2/312009 211012009 < 0.028 0.022 +1- 0.0010 20090130 2/1012009 211712009 < 0.020 0.025 +1- 0.0010 20090154 2117/2009 2/24/2009 < 0.020 0.035 +1- 0.0011 20090183 212412009 3/312009 < 0.020 0.029 +1- 0.00 10 20090213 3/312009 311012009 < 0.025 0.029 +1- 0.0010 20090222 311012009 3/1712009 < 0.024 0.018 +1- 0.0010 20090280 3/1712009 3/24/2009 < 0.066 0.029 +/- 0.0046 20090283 3/2412009 3/2512009 < 0.061 <0.012 20090309 3125/2009 3/3112009 < 0.026 0.014 +1- 0.0007 20090343 3/3112009 417/2009 < 0.023 0.018 +/- 0.0010 20090368 41712009 411412009 < 0.029 0.021 +1- 0.0009 20090398 4/1412009 412112009 < 0.026 0.017 +1- 0.0009 20090426 412112009 412812009 < 0.024 0.029 +1- 0.0011 43

LLD (pCilml\ 3) AS-l PG 0.07 0.01 LABID START DATE END DATE 1-131 GROSS BETA 20090466 4/2812009 5/512009 < 0.023 0.015 +/- 0.0008 20090492 5/512009 5/12/2009 < 0.025 0.015 +/- 0.0008 20090502 5/1212009 5/19/2009 < 0.020 0.016 +/- 0.0009 20090506 5/1912009 512612009 < 0.017 0.013 +/- 0.0008 20090560 512612009 6/212009 < 0.025 0.026 +/- 0.0010 20090571 6/2/2009 6/9/2009 < 0.026 0.021 +/- 0.0009 20090602 6/912009 6/1612009 < 0.032 0.027 +/- 0.0010 20090651 6/16/2009 6/2312009 < 0.022 0.030 +/- 0.0011 20090706 612312009 6/30/2009 < 0.031 0.030 +/- 0.0011 20090737 6/30/2009 7/7/2009 < 0.024 0.026 +/- 0.0010 20090755 7/712009 7/1412009 < 0.028 0.034 +/- 0.0011 20090825 7/14/2009 7/21/2009 < 0.033 0.021 +/- 0.0009 20090860 7121/2009 7/2812009 < 0.025 0.022 +/- 0.0010 20090847 7128/2009 8/412009 < 0.030 0.019 +/- 0.0008 20090873 8/412009 8/11/2009 < 0.020 0.022 +/- 0.0009 20090918 8/11/2009 8/1812009 < 0.034 0.016 +/- 0.0008 20090922 8/18/2009 8125/2009 < 0.028 0.022 +/- 0.0009 20090938 812512009 9/1/2009 < 0.023 0.029 +/- 0.0010 20090965 9/112009 9/812009 < 0.025 0.030 +/- 0.0010 20090998 9/812009 9/15/2009 < 0.023 0.020 +/- 0.0009 44

LLD (pCi/m"3) AS-l PG 0.07 0.01 LABID START DATE END DATE 1-131 GROSS BETA 20091019 9/15/2009 9/22/2009 < 0.036 0.020 +/- 0.0009 20091024 9/22/2009 9/29/2009 < 0.020 0.016 +/- 0.0009 20091065 9/29/2009 10/6/2009 < 0.030 0.020 +/- 0.0009 20091100 10/6/2009 10/13/2009 < 0.018 0.011 +/- 0.0007 20091130 10/13/2009 10/20/2009 < 0.023 0.016 +/- 0.0008 20091160 10/20/2009 10/27/2009 < 0.033 0.019 +/- 0.0009 20091164 10/27/2009 1113/2009 < 0.019 0.020 +/- 0.0009 20091174 1113/2009 11110/2009 < 0.019 0.037 +/- 0.0011 20091212 11/10/2009 11/17/2009 < 0.026 0.038 +/- 0.0011 20091237 11/17/2009 11124/2009 < 0.028 0.038 +/- 0.0012 20091257 11/24/2009 12/1/2009 < 0.017 0.030 +/- 0.0010 20091295 12/1/2009 12/8/2009 < 0.020 0.027 +/- 0.0010 20091344 12/8/2009 12/15/2009 < 0.026 0.030 +/- 0.0011 20091363 12/15/2009 12/22/2009 < 0.019 0.049 +/- 0.0013 20091379 12/22/2009 12/29/2009 < 0.026 0.030 +/- 0.0010 Average: 0.024 Maximum: 0.049 Minimum: 0.011 45

Table 1.1 Sample Type: Air Particulate Filter and Radioiodine Cartridge Analysis: Gross Beta and 1-131 Units: pCi/m3 AIR SAMPLE AS-3 61VA - GGNS - Control LLD (pCi/m A 3) AS-361VA 0.07 0.01 LABID START DATE END DATE 1-131 GROSS BETA 20090004 12/30/2008 1/6/2009 < 0.017 0.023 +/- 0.0009 20090058 1/6/2009 1/13/2009 < 0.027 0.034 +/- 0.0011 20090064 1/13/2009 1/20/2009 < 0.021 0.031 +/- 0.0011 20090085 1/20/2009 1/27/2009 < 0.018 0.036 +/- 0.0011 20090099 1/27/2009 2/3/2009 < 0.017 0.024 +/- 0.0010 20090127 2/3/2009 2/10/2009 < 0.035 0.023 +/- 0.0010 20090131 2/10/2009 2/17/2009 < 0.019 0.025 +/- 0.0010 20090155 2/17/2009 2/24/2009 < 0.014 0.038 +/- 0.0012 20090184 2/24/2009 3/3/2009 < 0.017 0.030 +/- 0.0010 20090214 3/3/2009 3/10/2009 < 0.027 0.033 +/- 0.0011 20090223 3/10/2009 3/17/2009 < 0.029 0.021 +/- 0.0010 20090281 3/17/2009 3/24/2009 < 0.033 0.029 +/- 0.0007 20090310 3/24/2009 3/31/2009 < 0.023 0.016 +/- 0.0006 20090344 3/31/2009 4/7/2009 < 0.024 0.020 +/- 0.0010 20090369 4/7/2009 4/14/2009 < 0.031 0.022 +/- 0.0009 20090399 4/14/2009 4/21/2009 < 0.027 0.022 +/- 0.0010 20090427 4/21/2009 4/28/2009 < 0.028 0.029 +/- 0.0011 20090467 4/28/2009 5/5/2009 < 0.019 0.014 +/- 0.0008 46

LLD (pCi/rn A 3) AS-361VA 0.07 0.01 LABID START DATE END DATE 1-131 GROSS BETA 20090493 5/5/2009 5/12/2009 < 0.027 0.015 +/- 0.0008 20090503 5/12/2009 5/19/2009 < 0.022 0.017 +/- 0.0010 20090507 5/19/2009 5/26/2009 < 0.020 0.013 +/- 0.0009 20090561 5/26/2009 6/2/2009 < 0.024 0.025 +/- 0.0009 20090572 6/2/2009 6/9/2009 < 0.028 0.021 +/- 0.0010 20090603 6/9/2009 6/16/2009 < 0.021 0.028 +/- 0.0010 20090652 6/16/2009 6/23/2009 < 0.025 0.030 +/- 0.0011 20090707 6/23/2009 6/30/2009 < 0.025 0.030 +/- 0.0011 20090738 6/30/2009 7/7/2009 < 0.025 0.030 +/- 0.0011 20090756 7/7/2009 7/14/2009 < 0.030 0.038 +/- 0.0012 20090826 7/14/2009 7/21/2009 < 0.035 0.022 +/- 0.0009 20090861 7/21/2009 7/28/2009 < 0.027 0.023 +/- 0.0010 20090848 7/28/2009 8/4/2009 < 0.025 0.022 +/- 0.0009 20090874 8/4/2009 8/11/2009 < 0.019 0.025 +/- 0.0010 20090919 8/11/2009 8/18/2009 < 0.025 0.020 +/- 0.0009 20090923 8/18/2009 8/25/2009 < 0.029 0.025 +/- 0.0009 20090939 8/25/2009 9/1/2009 < 0.024 0.034 +/- 0.0011 20090966 9/1/2009 9/8/2009 < 0.027 0.030 +/- 0.0010 20090999 9/8/2009 9/14/2009 < 0.027 0.022 +/- 0.0010 20091020 9/14/2009 9/22/2009 < 0.027 0.019 +/- 0.0008 47

LLD (pCi/m A 3) AS-361VA 0.07 0.01 LABID START DATE END DATE 1-131 GROSS BETA 20091025 9/22/2009 9/29/2009 < 0.021 0.017 +/- 0.0009 20091066 9/29/2009 10/6/2009 < 0.027 0.020 +/- 0.0009 20091101 10/6/2009 10/12/2009 < 0.020 0.012 +/- 0.0008 20091131 10/12/2009 10/19/2009 < 0.034 0.015 +/- 0.0008 20091161 10/19/2009 10/27/2009 < 0.030 0.021 +/- 0.0009 20091165 10/27/2009 11/3/2009 < 0.019 0.022 +/- 0.0009 20091175 11/3/2009 11/10/2009 < 0.016 0.038 +/- 0.0011 20091213 11/10/2009 11/16/2009 < 0.034 0.041 +/- 0.0012 20091238 11/16/2009 11/24/2009 < 0.025 0.035 +/- 0.0010 20091258 11/24/2009 12/1/2009 < 0.016 0.032 +/- 0.0011 20091296 12/1/2009 12/7/2009 < 0.019 0.029 +/- 0.0011 20091345 12/7/2009 12/14/2009 < 0.030 0.036 +/- 0.0011 20091364 12/14/2009 12/21/2009 < 0.019 0.055 +/- 0.0013 20091380 12/21/2009 12/28/2009 < 0.033 0.035 +/- 0.0011 Average: 0.026 Maximum: 0.055 Minimum: 0.012 48

Table 1.1 Sample Type: Air Particulate Filter and Radioiodine Cartridge Analysis: Gross Beta and 1-131 Units: pCilm3 AIR SAMPLE AS GGNS - Indicator LLD (pCilml\3) AS-7UH 0.07 0.01 LABID START DATE END DATE 1-131 GROSS BETA 20090005 12/3012008 1/612009 < 0.015 0.022 +/- 0.0009 20090059 1/612009 1113/2009 < 0.022 0.034 +/- 0.0011 20090065 111312009 112012009 < 0.016 0.030 +/- 0.00 10 20090086 112012009 112712009 < 0.017 0.031 +/- 0.0010 20090100 1127/2009 2/3/2009 < 0.022 0.024 +/- 0.0010 20090128 2/3/2009 2/10/2009 < 0.028 0.021 +/- 0.0010 20090132 2/1012009 2/1712009 < 0.019 0.025 +/- 0.0010 20090156 2/1712009 2/2412009 < 0.016 0.034 +/- 0.00 11 20090185 2124/2009 3/312009 < 0.022 0.031 +/- 0.0011 20090215 3/312009 3/1012009 < 0.029 0.027 +/- 0.0010 20090224 3/1012009 3/1712009 < 0.020 0.020 +/- 0.0009 20090282 3/1712009 312412009 < 0.024 0.029 +/- 0.0007 20090311 312412009 3/3112009 < 0.028 0.015 +/- 0.0006 20090345 3/3112009 41712009 < 0.025 0.020 +/-0.0010 20090370 41712009 4/14/2009 < 0.027 0.022 +/- 0.0010 20090400 4/14/2009 4/2112009 < 0.030 0.021 +/- 0.0009 20090428 412112009 4/2812009 < 0.023 0.028 +/- 0.0010 20090468 412812009 5/512009 < 0.026 0.015 +/- 0.0008 49

LLD (pCi/m"3) AS-7UH 0.07 0.01 LABID START DATE END DATE 1-131 GROSS BETA 20090494 5/5/2009 5/12/2009 < 0.029 0.016 +/- 0.0008 20090504 5/12/2009 5/19/2009 < 0.023 0.017 +/- 0.0010 20090508 5/19/2009 5/26/2009 < 0.017 0.012 +/- 0.0008 20090562 5/26/2009 6/2/2009 < 0.023 0.025 +/- 0.0009 20090573 6/2/2009 6/9/2009 < 0.029 0.021 +/- 0.0009 20090604 6/9/2009 6/16/2009 < 0.032 0.027 +/- 0.0010 20090653 6/16/2009 6/23/2009 < 0.023 0.030 +/- 0.0011 20090708 6/23/2009 6/30/2009 < 0.024 0.030 +/- 0.0011 20090739 6/30/2009 7/7/2009 < 0.030 0.029 +/- 0.0010 20090757 7/7/2009 7/14/2009 < 0.022 0.036 +/- 0.0011 20090827 7/14/2009 7/21/2009 < 0.031 0.020 +/- 0.0009 20090862 7/21/2009 7/28/2009 < 0.025 0.021 +/- 0.0010 20090849 7/28/2009 8/4/2009 < 0.022 0.018 +/- 0.0008 20090875 8/4/2009 8/11/2009 < 0.015 0.019 +/- 0.0009 20090920 8/11/2009 8/18/2009 < 0.026 0.016 +/- 0.0008 20090924 8/18/2009 8/25/2009 < 0.025 0.025 +/- 0.0009 20090940 8/25/2009 9/1/2009 < 0.028 0.027 +/- 0.0009 20090967 9/1/2009 9/8/2009 < 0.027 0.027 +/- 0.0010 20091000 9/8/2009 9/15/2009 < 0.023 0.018 +1-

+/- 0.0008 20091021 9/15/2009 9/22/2009 < 0.029 0.018 +/- 0.0009 50

LLD (pCi/m A 3) AS-7UH 0.07 0.01 LABID START DATE END DATE 1-131 GROSS BETA 20091026 9/2212009 9129/2009 < 0.029 0.014 +/- 0.0008 20091067 9/2912009 10/612009 < 0.025 0.019 +/- 0.0009 20091107 10/6/2009 10/1312009 < 0.018 0.009 +/- 0.0007 20091132 10/13/2009 10120/2009 < 0.023 0.015 +/- 0.0008 20091162 10/2012009 10/27/2009 < 0.031 0.017 +/- 0.0009 20091166 1012712009 11/3/2009 < 0.026 0.018 +/- 0.0009 20091176 11/312009 11/1012009 < 0.017 0.033 +/- 0.0011 20091214 11/10/2009 11/1712009 < 0.028 0.033 +/- 0.0011 20091239 11/17/2009 11/24/2009 < 0.026 0.032 +/- 0.0011 20091259 11/2412009 12/1/2009 < 0.016 0.025 +/- 0.0010 20091297 12/1/2009 12/812009 < 0.015 0.022 +/- 0.0009 20091346 12/812009 12/1512009 < 0.019 0.026 +/- 0.0010 20091365 12/1512009 1212212009 < 0.017 0.047 +/- 0.0012 20091381 1212212009 1212912009 < 0.026 0.026 +/- 0.0010 Average: 0.024 Maximum: 0.047 Minimum: 0.009 51

Table 1.2 Sample Type: Air Particulate Filter Analysis: Gamma Isotopic Units: pCi/m3 AIR PARTICULATE FILTER QUARTERLY COMPOSITES (GAMMA) - GGNS LLD (pCi/m A 3) 0.05 0.06 LABID LOCATION DATE CS-134 CS-137 20090355 AS-l PG 2/13/2009 < 0.006 < 0.004 20090356 AS-361VA 2/13/2009 < 0.002 < 0.004 20090357 AS-7UH 2/13/2009 < 0.004 < 0.004 20090724 AS-l PG 5/15/2009 < 0.005 < 0.003 20090725 AS-361VA 5/15/2009 < 0.005 < 0.003 20090726 AS-7UH 5/15/2009 < 0.005 < 0.003 20091061 AS-l PG 8/14/2009 < 0.005 < 0.004 20091062 AS-361VA 8/14/2009 < 0.005 < 0.004 20091063 AS-7 UH 8/14/2009 < 0.004 < 0.004 20091388 AS-l PG 11/13/2009 < 0.006 < 0.004 20091389 AS-361VA 11/13/2009 < 0.006 < 0.005 20091390 AS-7 UH 11/13/2009 < 0.006 < 0.005 52

Table 2.1 Sample Type: Thermoluminescent Dosimeters Analysis: Gamma Dose Units: mremlQtr Inner Ring - Within General Area of Site Boundary (ODCM Specifications)

Station 1st Qtr 2nd Qtr 3rd Qtr 4th Qtr Annual Mean M-16 11.0 9.8 lOA 10.7 10.5 M-19 10.3 lOA 11.2 10.7 10.6 M-21* 16.6 15.7 1804 1704 17.0 M-22 9.6 12.6 11.0 lOA 10.9 M-23 8.0 6.9 8.8 8.1 7.9 M-25 8.5 5.6 9.3 7.1 7.6 M-28 11.7 10.5 12.2 12.0 11.6 M-94 10.7 10.3 10.5 10.8 10.6 M-95 8.2 7.6 8.6 11.7 9.0 M-96 8.5 6.6 6.9 7.7 7.5 M-97 7.1 6.7 8.0 7.0 7.2 M-98 13.3 12.8 13.6 1304 13.3 M-99 15.8 15.5 17.3 1604 16.3 M-100 12.1 11.4 1204 11.7 11.9

• Location with highest annual mean Outer Ring - Approximately Three (3) to Five (5) Miles from the Site (ODCM Specifications)

Station 1st Qtr 2nd Qtr 3rd Qtr 4th Qtr Annual Mean M-36 8.0 8.7 9.0 8.2 8.5 M-40 5.9 5.3 6.3 604 6.0 M-48 10.8 9.9 11.1 lOA 10.5 M-49 11.6 10.9 12.2 11.7 11.6 M-50 10.2 9.7 10.9 10.6 10.3 M-55 12.3 12.3 12.8 11.7 12.3 M-55

• 11.1 1204 12.7 11.5 11.9

• Location with highest annual mean.

53

Table 2.2 Sample Type: Thermoluminescent Dosimeters Analysis: Gamma Dose Units: mremlQtr Special Interest Areas - Population Centers & Schools (ODCM Specifications)

Station 1st Qtr 2nd Qtr 3rd Qtr 4th Qtr Annual Mean M-01* 11.5 11.9 M-07 1204 10.9 M-09 10.7 lOA M-10 8.8 804 M-33 8.8 8.5 M-38 11.2 9.8 M-39 10.0 904

• Location with highest annual mean.

54

Table 2.3 Sample Type: Thermoluminescent Dosimeters Analysis: Gamma Dose Units: mremlQtr mrem/Qtr Special Interest Areas - Control (ODCM Specifications)

Station 1st Qtr 2nd Qtr 3rd Qtr 4th Qtr Annual Mean M-14 11.4 10.5 12.2 11.2 11.3 55

Table 3.1 Sample Type: Surface Water Analysis: Gamma Isotopic Units: pCill SURFACE WATER SAMPLES (GAMMA) - GGNS LLDILIQUID (pC ill) 15 15 30 15 30 15 30 15 15 18 60 15 LAB ID LOCATION DATE MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 1-131 CS-I34 CS-137 BA-140 LA-140 20090087 MRUP 1/27/2009 < 7.92 < 8.95 < 14.13 < 9.19 < 14.13 < 8.33 < 10.94 < 10.08 < 9.37 < 7.33 < 33.86 < 11.93 20090089 MRDOWN 1/27/2009 < 8.28 < 9.04 < 19.27 < 11.02 < 12.22 < 7.78 < 20.61 < 12.58 < 9.52 < 12.35 < 32.36 < 6.84 20090472 MRUP 5/7/2009 < 5.96 < 5.22 < 12.30 < 5.72 < 14.38 < 8.66 < 12.97 < 14.88 < 7.22 < 4.83 < 41.14 < 13.87 20090474 MRDOWN 5/712009 < 5.53 < 4.86 < 9.76 < 5.32 < 9.21 < 6.37 < 10.43 < 14.74 < 5.24 < 6.12 < 31.87 < 11.27 20090476 MRDOWN GG 5/712009 < 4.81 < 5.24 < 12.16 < 5.94 < 12.24 < 7.57 < 11.80 < 14.21 < 6.17 < 5.46 < 35.79 < 10.36 20090886 MRUP 8/13/2009 < 6.03 < 8.52 < 14.27 < 8.85 < 16.65 < 7.82 < 13.03 < 14.87 < 8.71 < 8.33 < 30.85 < 12.03 20090888 MRDOWN 8/13/2009 < 6.93 < 7.28 < 13.20 < 6.93 < 16.44 < 8.60 < 12.86 < 13.13 < 8.53 < 7.86 < 39.93 < 14.43 20091217 MRUP 11/1712009 < 10.98 < 11.13 < 15.34 < 5.13 < 19.12 < 10.38 < 12.66 < 14.88 < 11.30 < 9.19 < 51.07 < 11.10 20091219 MRUPGG 11/17/2009 < 9.01 < 7.43 < 16.78 < 8.98 < 13.89 < 10.06 < 14.82 < 13.36 < 9.70 < 9.23 < 33.75 < 14.06 20091221 MRDOWN 11/17/2009 < 6.40 < 8.63 < 19.60 < 10.04 < 18.86 < 10.01 < 15.53 < 14.79 < 7.68 < 9.43 < 49.78 < 13.28 56

LLDILIQUID (pCiII) 15 15 30 15 30 15 30 15 15 18 60 15 LABID LOCATION DATE MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 1-131 CS-I34 CS-137 BA-140 LA-140 20091223 MROOWNGG 11117/2009 < 8.39 < 9.05 < 12.48 < 9.06 < 15.25 < 8.22 < 12.19 < 14.63 < 6.81 < 6.85 < 34.38 < 14.45 20091366 MROOWN* 1212112009 < 8.30 < 7.35 < 15.02 < 9.04 < 16.02 < 8.19 < 12.44 < 11.73 < 9.44 < 9.01 < 39.08 < 12.70 20091367 MRDOWNGG* 1212112009 < 7.30 < 6.51 < 15.08 < 6.23 < 15.00 < 7.84 < 11.34 < 12.32 < 7.48 < 8.18 < 41.'\L1 < 11.95 "GG" - indicates duplicate sample.

• Annual Sample collected during liquid discharge 57

Table 3.2 Sample Type: Surface Water Analysis: Tritium Units: pCill SURFACE WATER SAMPLES (TRITIUM) - GGNS LLD (pCiII) SURFACE WATER B-3 3000 LABID LOCATION DATE TRITIUM 20090088 MRUP 1127/2009 < 560 20090090 MRDOWN 1127/2009 <560 20090473 MRUP 517/2009 < 547 20090475 MRDOWN 517/2009 < 552 20090477 MRDOWNGG 517/2009 < 551 20090887 MRUP 8/13/2009 <548 20090889 MRDOWN 8/13/2009 <549 20091216 MRUP 11/17/2009 <540 20091218 MRUPGG 11117/2009 < 545 20091220 MRDOWN 11117/2009 <542 20091222 MRDOWNGG 11/17/2009 <543 20091366 MRDOWN* 12/21/2009 < 631 20091367 MRDOWNGG* 12/2112009 <628 20090032 OUTFALL 007 1/12/2009 909+/- 258.14 20090129 OUTFALL 007 2/12/2009 <539 20090254 OUTFALL 007 3/13/2009 <550 20090401 OUTFALL 007 4/17/2009 <533 20090505 OUTFALL 007 5/19/2009 < 554 20090592 OUTFALL 007 6/12/2009 < 571 20090763 OUTFALL 007 7/16/2009 < 544 20090877 OUTFALL 007 8/17/2009 <560 20090900 OUTFALL 007 8/17/2009 <539 20090968 OUTFALL 007 9/8/2009 < 548 20091017 OUTFALL 007 9/17/2009 < 544 20091125 OUTFALL 007 10/19/2009 < 553 20091215 OUTFALL 007 11118/2009 < 540 20091355 OUTFALL 007 12/17/2009 <630 20091356 OUTFALL 007 GG 12/17/2009 < 629

• Annual Sample collected during liquid discharge "GG" - indicates duplicate sample.

58

Table 4.1 Sample Type: Groundwater Analysis: Gamma Isotopic Units: pei/l GROUND WATER SAMPLES (GAMMA) - GGNS LLD (PCill) 15 15 30 15 30 15 30 15 15 18 60 15 LABID LOCATION DATE MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 1-131 CS-134 CS-137 BA-140 LA-140 20091351 POWELL 12/15/2009 < 6.66 < 7.17 < 13.80 < 6.79 < 18.06 < 8.91 < 12.32 < 11.00 < 4.87 < 6.43 < 29.53 < 13.78 20091352 CONSTWELL 12/16/2009 < 10.92 < 10.92 < 19.22 < 4.36 < 21.64 < 14.76 < 17.66 < 13.79 < 8.99 < 11.70 < 47.08 < 14.64 59

Table 4.2 Sample Type: Groundwater Analysis: Tritium Units: pCi/l GROUND WATER SAMPLES ( TRITIUM) - GGNS LLD (pCi/l) 2000 LAB ID LOCATION DATE TRITIUM 20091351 PGWELL 12/15/2009 < 632.70 20091352 CONSTWELL 12/16/2009 < 629.57 60

Table 4.3 Sample Type: Groundwater Analysis: Iodine Units: pCi/l GROUND WATER SAMPLES (Iodine-131) - GGNS LLD(pCill) 1.0 LABID LOCATION DATE 1-131 20091351 PGWELL 12/15/2009 < 0.88 20091352 CONSTWELL 12/16/2009 < 0.97 61

Table 5.1 Sample Type: Sediment Analysis: Gamma Isotopic Units: pCilkg SEDIMENT SAMPLES (GAMMA) - GGNS LLD (pCilkg) 150 180 LABID LOCATION DATE CS-134 CS-137 20091353 SEDHAM 12/1612009 < 27.96 < 27.74 20091354 SEDCONT 12/1612009 < 24.83 < 23.85 62

Table 6.1 Sample Type: Fish Analysis: Gamma Isotopic Units: pCi/kg FISH SAMPLES (GAMMA) - GGNS LLD (pCi/kg) 130 130 260 130 260 130 150 LABID LOCATION DATE MN-54 CO-58 FE-59 CO-60 ZN-65 CS-134 CS-137 20091096 FISHUP 10/6/2009 < 21.01 < 20.71 < 45.35 < 27.87 < 41.48 < 17.14 < 18.89 20091097 FISHDOWN 10/6/2009 < 14.66 < 17.84 < 33.94 < 18.57 < 45.40 < 18.53 < 12.71 20091098 FISHUPGG 10/6/2009 < 18.26 < 15.85 < 55.19 < 21.06 < 48.26 < 17.40 < 21.01 20091099 FISHDOWNGG 10/612009 < 17.08 < 27.07 < 53.48 < 17.82 < 55.46 < 22.32 < 19.66 "GG" - indicates duplicate sample.

63

Table 7.1 Sample Type: Food Products Analysis: Iodine-I3I and Gamma Isotopic Units: pCi/kg VEGETATION SAMPLES (GAMMA) - GGNS LLD (pCi/kg) 60 60 80 LABID LOCATION DATE 1-131 CS-134 CS-137 20090124 VEG-CONT 2/912009 < 54.78 < 28.94 < 28.38 20090125 VEG-J 2/912009 < 58.87 < 47.39 < 48.63 20090552 VEG-CONT 5/27/2009 < 58.40 < 36.06 < 34.34 20090553 VEG-J 5/26/2009 < 59.98 < 35.52 < 30.07 20090912 VEG-J 8/18/2009 < 57.11 < 56.37 < 36.99 20090937 VEG-CONT 8/27/2009 < 59.99 < 29.23 < 18.66 20091224 VEG-CONT 11/1912009 < 58.08 < 50.78 < 42.93 20091225 VEG-CONTGG 11/19/2009 < 56.65 < 36.85 < 40.39 20091226 VEG-J 11/18/2009 < 52.84 < 35.40 < 41.28 20091227 VEG-JGG 11/19/2009 < 59.20 < 49.88 < 56.71 "GG" - indicates duplicate sample.

64

Table 8.1 Sample Type: Special Samples Analysis: Gamma Isotopic Units: pCi/kg SPECIAL SURFACE WATER SAMPLES (GAMMA) - GGNS LLD (pCi/l) 15 15 30 15 30 15 30 15 15 18 60 15 LAB ID LOCATION DATE MN-54 CO-58 FE-59 CO-60 ZN-65 NB-95 ZR-95 1-131 CS-134 CS-137 BA-140 LA-140 20090031 OUTFALL 007 1/12/2009 < 13.55 < 10.70 < 18.41 < 7.05 < 21.33 < 7.95 < 13.10 < 14.28 < 10.76 < 10.89 < 29.63 < 13.05 20090453 OUTFALL 007 5/1/2009 < 8.21 < 8.60 < 14.61 < 7.54 < 20.11 < 11.25 < 19.01 < 14.57 < 8.56 < 7.05 < 37.79 < 10.94 20090878 OUTFALL 007 8/17/2009 < 8.97 < 9.36 < 21.76 < 11.30 < 21.21 < 9.43 < 15.49 < 9.90 < 9.39 < 10.75 < 39.70 < 9.05 20090969 OUTFALL007 9/8/2009 < 11.52 < 10.84 < 18.09 < 9.48 < 14.81 < 12.31 < 16.61 < 13.95 < 9.34 < 8.53 < 40.24 < 12.97 20091355 OUTFALL 007 12/17/2009 < 6.52 < 6.67 < 17.39 < 6.83 < 15.15 < 9.21 < 11.31 < 13.65 < 7.27 < 8.81 < 40.57 < 9.15 65

Table 9.1 Sample Type: Interlaboratory Comparison Analysis: Gross Beta, Tritium, Iodine-13I and Gamma Isotopic RIVER BEND STATION ENVIRONMENTAL (CROSS-CHECK) PROGRAM PARTICIPATION RESULTS Analytics Gamma in E6674-125 Water March 19, 2009 RBS RBS Ref Lab Ref Lab Resolution RBS/Ref Lab Pass/

Nuclide Mean 1-s Value Uncertainty Ratio Fail 1-131 73.3 0.13 69.0 1.15 60 1.06 Pass Ce-141 126 2.54 120 2.01 59.7 1.05 Pass Cr-51 371 10.9 387 6.46 59.9 0.96 Pass Cs-134 118 2.11 119 1.98 60.1 0.99 Pass Cs-137 151 2.91 141 2.36 59.7 1.07 Pass Co-58 154 2.65 151 2.52 59.9 1.02 Pass Mn-54 173 4.05 162 2.70 60 1.07 Pass Fe-59 134 2.84 127 2.11 60.2 1.06 Pass Zn-65 199 2.71 197 3.30 59.7 1.01 Pass Co-60 189 0.31 180 3.01 59.8 1.05 Pass Analytics Gross E6675-125 Beta in March 19, 2009 Water RBS RBS Ref Lab Ref Lab Resolution RBS/Ref Lab Passl Nuclide Mean 1-s Value uncertainty Ratio Fail Cs-137 240 2.66 235 3.92 59.9 1.02 Pass Analytics 1-131 E6676-125 cartridge March 19,2009 RBS RBS Ref Lab Ref Lab Resolution RBS/Ref Lab Passl Nuclide Mean 1-s Value uncertainty Ratio Fail 1-131 76.0 2.75 78.6 1.31 60.0 0.97 Pass 66

RIVER BEND STATION ENVIRONMENTAL (CROSS-CHECK) PROGRAM PARTICIPATION RESULTS Analytics Gamma in E6677-125 Milk March 19, 2009 RBS RBS Ref Lab Ref Lab Resolution RBS/Ref Lab Pass/

Nuclide Mean 1-s Value uncertainty Ratio Fail 1-131 74.0 4.10 79.3 1.32 60.1 0.93 Pass Ce-141 91.2 3.91 94.9 1.58 60.1 0.96 Pass Cr-51 283 20.9 305 5.10 59.8 0.93 Pass Cs-134 95.5 2.04 93.7 1.57 59.7 1.02 Pass Cs-137 107 0.95 111 1.86 59.7 0.96 Pass Co-58 111 2.80 119 1.99 59.8 0.93 Pass Mn-54 136 3.79 128 2.13 60.1 1.06 Pass Fe-59 109 5.85 99.9 1.67 59.8 1.09 Pass Zn-65 159 6.00 156 2.60 60.0 1.02 Pass Co-60 143 1.22 142 2.38 59.7 1.01 Pass Analytics H-3 E6707-125 in water June 18,2009 RBS RBS Ref Lab Ref Lab Resolution RBS/Ref Lab Passl Nuclide Mean 1-s Value uncertainty Ratio Fail H-3 12591 368 13300 223 59.6 0.95 Pass Analytics Gross E6708-125 Beta filter June 18,2009 RBS RBS Ref Lab Ref Lab Resolution RBS/Ref Lab Passl Nuclide Mean 1-s Value uncertainty Ratio Fail Cs-137 91.6 0.59 86.5 1.44 60.1 1.06 Pass Analytics Gamma E6709-125 Filter June 18, 2009 RBS RBS Ref Lab Ref Lab Resolution RBS/Ref Lab Passl Nuclide Mean 1-s Value Uncertainty . Ratio Fail Ce-141 119 2.5 120 2.0 60 0.99 Pass Cr-51 172 11.1 169 2.82 59.9 1.02 Pass Cs-134 66.9 1.2 69.8 1.17 59.7 0.96 Pass Cs-137 83.3 0.8 80.8 1.35 59.9 1.03 Pass Co-58 40.1 0.6 38.7 0.646 59.9 1.03 Pass Mn-54 60.5 1.4 57.7 0.964 59.9 1.05 Pass Fe-59 55.5 1.3 51.5 0.860 59.9 1.08 Pass Zn-65 80.4 1.7 73.9 1.23 60.1 1.09 Pass Co-60 136 2.4 131 2.19 59.8 1.04 Pass 67

RIVER BEND STATION ENVIRONMENTAL (CROSS-CHECK) PROGRAM PARTICIPATION RESULTS Analytics Gamma E6710-125 Soil June 18, 2009 RBS RBS Ref Lab Ref Lab Resolution RBS/Ref Lab Pass/

Nuclide Mean 1-s Value Uncertainty Ratio Fail Ce-141 0.461 1.9ge-3 0.462 7.72e-3 59.8 1.00 Pass Cr-51 0.631 5.6ge-3 0.652 1.0ge-2 59.8 0.97 Pass Cs-134 0.269 1.32e-3 0.270 4.51e-3 59.9 1.00 Pass Cs-137 0.428 4.94e-3 0.406 6.78e-3 59.9 1.05 Pass Co-58 0.144 2.26e-3 0.150 2.51e-3 59.8 0.96 Pass Mn-54 0.231 1.9ge-3 0.223 3.72e-3 59.9 1.04 Pass Fe-59 0.201 1.50e-3 0.199 3.32e-3 59.9 1.01 Pass Zn-65 0.299 4.70e-3 0.286 4.78e-3 59.8 1.05 Pass Co-60 0.509 3.72e-3 0.507 8.47e-3 59.9 1.00 Pass 100% of interlaboratory crosscheck results were within control limits for accuracy and 100% were within control limits for precision.

68