ML101120068

Submittal of Annual Radiological Environmental Operating Report for 2008

ML101120068
Person / Time
Site:	Rancho Seco, 07200011
Issue date:	04/15/2009
From:	Ronningen E Sacramento Municipal Utility District (SMUD)
To:	NRC Region 4
References
DPG 09-132
Download: ML101120068 (70)

Text

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P.O. Box 15830, Sacramento, CA 95852-1830; 1-888-742-SMUD (7683)

DPG 09-132 April 15, 2009 u.s. Nuclear Regulatory Commission Region IV Administrator 612 E. Lamar Blvd., Suite 400 Arlington, Texas 76011-4125 2009 Docket No. 50-312 Rancho Seco Nuclear Generating Station License No. DPR-54 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT FOR 2008 Attention: Region IV Administrator In accordance with Rancho Seco Quality Manual, Appendix A, Section 1.5.3, we are submitting the Rancho Seco 2008 Annual Radiological Environmental Operating Report for the period ofJanuary 1,2008 through December 31, 2008.

If you or members of your staff have questions requiring additional information or clarification, please contact me at (916) 732-4817.

ff Einar Ronningen Superintendent, Rancho Seco Assets Cc

NRC, Document Control Desk REGION IV RANCHO SECO NUCLEAR PLANT "14440 Twin Cities Road, Herald, CA 95638-9799; (209) 333-2935

ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT JANUARY - DECEMBER 2008 Rancho Seco Nuclear Station Herald, California 10 CFR Part 50 License Number DPR-54 10 CFR Part 72 License Number SNM 2510

Rancho Seco Nuclear Station ii 2008 AREOR 2008 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT TABLE OF CONTENTS TABLE OF CONTENTS.................................................................................................................................. ii LIST OF FIGURES........................................................................................................................................ iii LIST OF TABLES.......................................................................................................................................... iv I. EXECUTIVE

SUMMARY

............................................................................................................................ 1 II. LAND USE CENSUS................................................................................................................................. 3 III. RADIOLOGICAL IMPACT EVALUATION................................................................................................. 3 PREDICTED POTENTIAL RADIOLOGICAL IMPACT....................................................................... 3 FUEL CYCLE DOSE EVALUATION.................................................................................................. 3 OBSERVED POTENTIAL RADIOLOGICAL IMPACT....................................................................... 4 IV. PROGRAM ANALYSIS RESULTS

SUMMARY

....................................................................................... 7 IV-A. ATMOSPHERIC MONITORING............................................................................................. 7 IV-B. DIRECT RADIATION MONITORING..................................................................................... 8 IV-C. TERRESTRIAL MONITORING.............................................................................................. 8 IV-D. AQUATIC LIFE MONITORING.............................................................................................. 9 IV-E. WATER MONITORING.......................................................................................................... 9 V. REFERENCES.................................................................................................................................... 16 VI. APPENDICES..................................................................................................................................... 18 2009 LAND USE CENSUS RESULTS.......................................................................................... A-1 SAMPLE SITE DESCRIPTIONS AND MAPS................................................................................. B-1 QUALITY CONTROL SAMPLE ANALYSIS RESULTS................................................................... C-1 SAMPLE COLLECTION AND ANALYSIS METHODS.................................................................... D-1 ENVIRONMENTAL MONITORING PROGRAM DESIGN.............................................................. E-1 2008 SAMPLE ANALYSIS RAW DATA TABLES........................................................................... F-1 2008 MISSED SAMPLE REPORT................................................................................................ G-1

Rancho Seco Nuclear Station iii 2008 AREOR LIST OF FIGURES FIGURE TITLE PAGE FIGURE B-1 RADIOLOGICAL ENVIRONMENTAL SAMPLING LOCATIONS ON AND NEAR THE SITE --------------------------------------------------------------------------------------- B-3 FIGURE B-2 RADIOLOGICAL ENVIRONMENTAL SAMPLING LOCATIONS WITHIN 1 MILE FROM THE REACTOR BUILDING --------------------------------------------------------- B-4 FIGURE B-3 RADIOLOGICAL ENVIRONMENTAL SAMPLING LOCATIONS FROM 1 TO 5 MILES FROM THE REACTOR BUILDING ---------------------------------------------- B-5 FIGURE B-4 RADIOLOGICAL ENVIRONMENTAL SAMPLING LOCATIONS 5 TO 25 MILES FROM THE REACTOR BUILDING -------------------------------------------------------- B-6

Rancho Seco Nuclear Station iv 2008 AREOR LIST OF TABLES TABLE TITLE PAGE 1

2008 LIQUID EFFLUENT PATHWAY POTENTIAL DOSE COMPARISON 6

2 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM ANNUAL

SUMMARY

11 B-1 RADIOLOGICAL ENVIRONMENTAL MONITORING SITES AND MAP LOCATIONS B-7 C-1 2008 INTERLABORATORY COMPARISON PROGRAM C-4 E-1 REPORTING LEVELS FOR RADIOACTIVITY CONCENTRATIONS IN ENVIRONMENTAL SAMPLES E-9 E-2 MAXIMUM (REQUIRED) LLD VALUES FOR ENVIRONMENTAL SAMPLES E-10 F-1 2008 WEEKLY AIR SAMPLE

SUMMARY

F-2 F-2 2008 LUXEL BADGE

SUMMARY

(DIRECT RADIATION)

F-4 F-3 2008 GARDEN VEGETABLES F-6 F-4 2008 SEDIMENT F-6 F-5 2008 FISH F-7 F-6 2008 WELL WATER F-7 F-7 2008 RUNOFF WATER F-8 F-8 2008 SURFACE WATER F-9 F-9 2008 DRINKING WATER F-11

Rancho Seco Nuclear Station 1

2008 AREOR 2008 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT I.

EXECUTIVE

SUMMARY

This report contains results from the Radiological Environmental Monitoring Program (REMP) for the Rancho Seco Nuclear Station (RSNS) compiled for the period January 1, 2008 through December 31, 2008. The Radiation Protection/ Chemistry Group at RSNS conducts this program in accordance with the REMP manual. This report is compiled and submitted in accordance with the Rancho Seco Quality Manual, Appendix A, Section 1.5.2.3 [RS02].

The results of the 2008 Radiological Environmental Monitoring Program showed that the operation of Rancho Seco Nuclear Station had no significant radiological impact on the environment.

Currently, the Plant is undergoing Decommissioning. During 2008 the major project for Decommissioning was the removal of all remaining equipment and concrete from the Reactor Building. That project has been completed. Surveys have been conducted in the Reactor Building to complete the Final Site Survey. The Radiological Decommissioning Project was completed on December 31, 2008.

During 2007 the onsite liquid effluent Retention Basins were removed as part of the Decommissioning process. The Offsite Dose Calculation Manual was revised to indicate that there was no longer a major liquid source term and the retention basins were no longer required to be in place for the discharge of radioactive liquid effluents. The REMP was not revised to eliminate monitoring of the liquid effluent pathway to provide for post-operational data for this pathway. As part of the process of radiological decommissioning, all gaseous effluent pathways were eliminated in 2008. As of 2009, the REMP has been revised to reflect that the only remaining pathway for the Rancho Seco Nuclear Station is the direct radiation pathway from the ISFSI and Interim Onsite Storage Building (IOS Building)

During the reporting period, the atmospheric, terrestrial and aquatic environs adjacent to RSNS were monitored. The sample measurements showed that the levels of radioactivity in the sampled media were consistent with previous years evaluations. All detected nuclides (greater than minimum detected activity) were below the required Nuclear Regulatory commission (NRC) reporting levels. All Lower Limits of Detection (LLD) were at or lower than the maximum required by the NRC.

Doses resulting from ambient exposure to terrestrial and atmospheric direct radiation sources were measured through the placement and retrieval of Luxel monitoring badges. Direct radiation measurements attributable to Station operations, based on control and indicator locations, were indistinguishable above background levels. Two monitoring badge locations, placed in an area near the effluents discharge stream are being used to evaluate the higher than average soil activity.

Rancho Seco Nuclear Station 2

2008 AREOR I.

EXECUTIVE

SUMMARY

(Continued)

During 2008 the soil in this area was remediated to comply with the Final Site Survey requirements. The dose at this location does not exceed the regulatory limits of 10 CFR Part

20. Onsite Luxel badge locations near the ISFSI access road show higher readings, attributed to the ISFSI, and are within design calculations. Additional direct radiation monitoring locations were added administratively around the ISFSI in anticipation of revising the REMP at the completion of Radiological Decommissioning.

Isotopic identifications were consistent with known releases of radioactive material from the Station to the atmospheric and aquatic environments. As expected, fish and sediment samples obtained from the environment of the No Name and Clay Creeks contributed the majority of positive isotopic identifications. Cesium-137 and Cobalt-60 are the predominant nuclides identified in the aquatic environment.

Rancho Seco Nuclear Station 3

2008 AREOR II.

LAND USE CENSUS The 2008 Land Use Census was conducted in accordance with the Rancho Seco Quality Manual [RS02] Section 1.4.3.2 and the Radiological Environmental Monitoring Program (REMP) manual section 4.0. This evaluation is in accordance with the requirements of 10 CFR Part 50, Appendix I, section IV.B.3. The land use census is performed on a biennial schedule and was performed during 2007/ 2008 and then completed in 2009. See Appendix A for results from this Land Use Census. With the completion of the radiological decommissioning, the REMP has been revised in 2009 to delete the requirement to perform a Land Use Census.

III.

RADIOLOGICAL IMPACT EVALUATION PREDICTED POTENTIAL RADIOLOGICAL IMPACT Gaseous Effluent Exposure Pathways The maximum calculated annual organ dose due to gaseous releases of tritium and particulate isotopes was 1.22 E-01 mRem (as calculated using the Rancho Seco Offsite Dose Calculation Manual (ODCM)). This calculated organ dose was 8.13 E -01% of the associated Rancho Seco Quality Manual (RSQM) [RS02] limit (10CFR50, Appendix I guideline).

Noble gases were not released in 2008 and therefore no dose calculations for noble gases were necessary.

Liquid Effluent Exposure Pathways The onsite liquid effluent pathway was decommissioned in 2007; therefore there were no liquid effluent releases or dose calculations for 2008. The REMP offsite dose was calculated for 2008 and is summarized in Table 1.

FUEL CYCLE DOSE EVALUATION REMP Manual section 8.14 requires each Annual Radiological Environmental Operating Report (AREOR) to include information related to REMP manual section 5.0; Fuel Cycle Dose.

The Fuel Cycle Dose Specification limits the dose or dose commitment to any real member of the public to 25 mRem to the total body or any organ, except the thyroid which is limited to 75 mRem. This specification implements requirements promulgated by the United States Environmental Protection Agency [CFRd].

Consistent with REMP manual section 5.0, no fuel cycle dose evaluation was required to be performed during 2008 since no REMP measurement exceeded the established reporting levels. Additionally, the Station effluent dose predictions did not exceed twice the dose guidelines of 10 CFR Part 50, Appendix I [CFRc]. The station operated within the Appendix I guidelines envelope for radioactive effluents (a condition supported by Program measurements); therefore, determination of an actual dose commitment delivered to a real member of the public was not required.

Rancho Seco Nuclear Station 4

2008 AREOR III.

RADIOLOGICAL IMPACT EVALUATION (Continued)

OBSERVED POTENTIAL RADIOLOGICAL IMPACT Gaseous Effluent Exposure Pathways The calculated gaseous effluent dose of 1.22 E -01 mRem [RS01] is based on tritium and particulate activity. The observed dose calculation, if completed, using the gross beta data (which is primarily due to naturally occurring radioisotopes) would not provide an accurate correlation with the predicted tritium and particulate activity dose calculations. Also, none of indicator locations for the REMP quarterly air filter composite gamma isotopic analysis results for the airborne pathway indicated the presence of nuclides of Station origin. In the third quarter of 2008 the filter composite for the Control location (RAS0.7EO) indicated Cs-137 0.011 pCi/ m3. This result is considered an anomaly and will not be used for any evaluations.

Therefore, no dose comparison was completed.

Direct Radiation Exposure Pathway Based on Luxel control and indicator locations measurement results obtained during 2008, the Station proper did not contribute an observable component to the recorded direct gamma radiation field. This Luxel data supports the Gaseous Effluent Exposure Pathway conclusions and supports the conclusion that the Plant has no direct radiation effect on the environment.

Luxel monitoring badges placed near the effluent stream (No Name Creek) was used to evaluate the dose from this area. Dose levels at these locations are higher than the mean of the control and indicator locations reported. This above average dose is due to elevated soil activity due to historic liquid effluent releases. This area has been remediated as part of the Decommissioning process. After completion of the remediation the dose levels decreased.

Luxel badge locations around the ISFSI outside fence (required by the ISFSI 10 CFR 72 license) show higher readings, attributed to the fuel stored in the ISFSI, and are within design calculations.

Liquid Effluent Exposure Pathways To evaluate the impact on the environment from the liquid effluent pathway, dose calculations were performed for 2008. The observed results presented in Table 1 were obtained using the Cs-137 activity reported for the fish samples from 2008 (Appendix F, Table F-5), default consumption quantities for fish (ODCM), and nuclide-specific dose factors [NRC77].

As in past reports, the observed potential dose commitments listed in Table 1 are subject to uncertainty, principally due to the assumption that the observed radioactivity was due to 2008 Station operations only and was not affected by radioactivity introduced into the environment prior to 2008. A major portion of the activity identified by Program measurements in 2008 is attributable to historical releases documented in previous annual reports. Additionally, the observed dose commitment calculations are based on conservative default consumption factors for fish and garden.

Rancho Seco Nuclear Station 5

2008 AREOR III.

RADIOLOGICAL IMPACT EVALUATION OBSERVED POTENTIAL RADIOLOGICAL IMPACT (Continued)

The 2008 Land Use Census indicates the liquid/ fish pathway is a potential exposure pathway.

The fish pathway dose commitment calculation uses conservative default fish consumption factors instead of using actual Land Use Census data. Also, the dose commitment calculation uses fish sample analysis data derived from fish samples collected from the plant effluent stream.

Rancho Seco Nuclear Station 6

2008 AREOR III.

RADIOLOGICAL IMPACT EVALUATION (Continued)

OBSERVED POTENTIAL RADIOLOGICAL IMPACT TABLE 1 2008 Liquid Effluent Pathway Potential Dose Comparison POTENTIAL DOSE COMMITMENT (Based on the maximally exposed group)

PREDICTED DOSE COMMITMENT (a)

(mRem)

OBSERVED DOSE COMMITMENT (b) (c)

(mRem)

PERCENT OF THE 10 CFR PART 50 APPENDIX I DOSE LIMITS 0.00 0.037 (Adult Total Body) 1.2 %

Total Body (3 mRem guideline) 0.00 0.057 (Teen liver) 0.57 %

Organ (10 mRem guideline)

Notes:

(a)

Reported in the 2008 Annual Radiological Effluent Release Report (ARERR).

(b)

Calculated using Cs-137 activity for fish samples (Appendix F, Table F-5); consumption factors from the ODCM and Regulatory Guide 1.109 dose conversion factors.

(c)

The observed dose commitments reflect the age group that could have received the highest annual dose commitment from the liquid source term

Rancho Seco Nuclear Station 7

2008 AREOR IV.

PROGRAM ANALYSIS RESULTS

SUMMARY

This section compiles Program data with corresponding evaluations. Each of the following five subsections presents information about each of the principal environmental exposure pathways monitored by the Program:

Atmospheric (Section IV-A)

Direct Radiation (Section IV-B)

Terrestrial (Section IV-C)

Aquatic Life (Section IV-D)

Water (Section IV-E)

Each of these sections contains a data evaluation subsection, which provides a summary of the data collected.

Table 2 is a comprehensive, all-media data summary presented in a format considered acceptable by the US Nuclear Regulatory Commission. Information contained in Table 2 was derived from data presented in Appendix F.

IV-A. ATMOSPHERIC MONITORING DATA EVALUATION No radionuclides attributable to the operation of Rancho Seco were observed in gamma spectrometry analyses of the quarterly composites of the particulate filters for the indicator locations.

Therefore, since all data was reported as being below the associated minimum detectable activity (MDA) for the nuclides of interest, no table is presented for the composite air filter data. The data indicates that there was no measurable contribution to the airborne radioactivity inventory that could reasonably be attributable to Station operations.

The results of the gross beta analyses of the particulate samples are given in Appendix F, Table F-1.

Rancho Seco Nuclear Station 8

2008 AREOR IV-B. DIRECT RADIATION MONITORING DATA EVALUATION A comparison review of all Luxel data for the indicator and control locations during 2008 showed that there was no observable direct radiation component due to Station operations (i.e., storage or utilization of licensed radioactive material within the restricted area.)

Two Luxel locations are being used to evaluate the dose in areas next to the effluent stream.

The data from these locations indicates doses are within regulatory limits of 10 CFR Part

20.

Luxel badge locations on the outside fence of the ISFSI show higher readings, but this is expected due to the spent fuel storage in the ISFSI. The results are within the design criteria and no license or regulatory limits were exceeded.

The summary data for 2008 direct radiation monitoring is presented in Table 2.

Comprehensive data tables are given in Appendix F, Table F-2.

IV-C. TERRESTRIAL MONITORING DATA EVALUATION Garden Vegetation - Two (2) garden vegetation samples were collected and analyzed for nuclides of interest during 2008. Gamma spectrometry analysis of the samples indicated results less than LLD. A site boundary irrigated garden has been utilized as a conservative method for evaluating the liquid effluent pathway. This method meets the requirement of the Land Use Census for monitoring gardens.

The summary data for 2008 terrestrial monitoring is presented in Table 2. Comprehensive data tables are given in the following Appendix F table:

F-3 (Garden Vegetables)

Rancho Seco Nuclear Station 9

2008 AREOR IV-D. AQUATIC LIFE MONITORING DATA EVALUATION Sediment - Twelve (12) samples of sediment were collected from the onsite discharge canal during 2008. Gamma spectrometry analysis of these samples indicated the presence of Cs-137 (12 samples, 19.1 to 252.0 pCi/kg, 104.9 pCi/kg mean), and Co-60 (1 sample, 8.45 pCi/kg).

The presence of nuclides of interest in sediments is attributed to historical permitted liquid effluent discharges.

Fish - Three (3) fish samples were collected during 2008 and analyzed for nuclides of interest by gamma spectrometry. Samples were collected in the effluent creek at the Site Boundary. Gamma spectrometry analysis of these samples indicated the presence of Cs-137 (1 sample, 24.6 pCi/kg).

The summary data for the aquatic life-monitoring program is shown in Table 2.

Comprehensive data tables are given in the following Appendix F Tables:

F-4 Sediment F-5 Fish IV-E. WATER MONITORING DATA EVALUATION Well Water - Eight (8) well water samples were collected at indicator and control locations around the site during 2008. Tritium and gamma spectrometry analysis of the samples indicated results less than LLD. Gross beta activity levels for all samples were within regulatory limits.

Runoff Water - Twenty-nine (29) runoff water samples were collected at the site boundary during 2008. Tritium and gamma spectrometry analysis of the samples indicated results less than LLD.

Surface Water - Five locations (3 indicator and 2 control) were included in the surface water-monitoring program. Composite samplers located at the Plant Intake (Folsom South Canal) and Effluent Discharge provides monthly composite samples. During 2008, 64 samples were collected and analyzed for nuclides of interest. Tritium and gamma spectrometry analysis of the samples indicated results less than LLD

Rancho Seco Nuclear Station 10 2008 AREOR IV-E. WATER MONITORING DATA EVALUATION (continued)

Drinking Water - Water supplied from two site wells is distributed in a potable water supply system for Station personnel consumption and use. On a monthly frequency, samples were collected and analyzed for nuclides of interest. A sample from the Rancho Seco Reservoir Well is collected as a control location. No gamma emitting isotopes were found present in the 36 samples collected in 2008. Gross Beta analysis showed activity within regulatory limits.

The summary data for the water-monitoring program is shown in Table 2. Comprehensive data tables are given in the following Appendix F Tables:

F-4 Sediment F-6 Well Water F-7 Runoff Water F-8 Surface Water F-9 Drinking Water

Rancho Seco Nuclear Station 11 2008 AREOR TABLE 2 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM ANNUAL

SUMMARY

(NRC Format)

TABLE 2 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM ANNUAL

SUMMARY

Name of Facility Rancho Seco Nuclear Station Docket No. DPR-54/ SNM 2510 Location of Facility Sacramento, California. Reporting Period January - December 2008 (County, State)

Rancho Seco Nuclear Station 12 2008 AREOR Medium or Pathway Sampled (Unit of Measurement)

Type and Total Number of Analysis Performed Lower Limit of Detection (LLD)b All Indicator Locations Mean (f)a Range Location with Highest Annual Mean Name Mean (f) a Distance Range

& Direction Control locations Mean (f) a Range Number of Nonroutine Reported Measurements Air Particulates (pCi/M3)

Gross (153) 0.01 0.022 (102/102)

(0.008- 0.057)

RAS0.1CO 0.022 (51/51) 0.1 miles 45° (0.008-0.058) 0.021 (51/51)

(0.008-0.053) 0

-spec (12) 137Cs 0.01

<LLD

<LLD 0.011 134Cs 0.01

<LLD

<LLD

<LLD Direct Radiation (mRem/qtr.)

Luxel (136)

NA 19.2 (120-120)

(11-31)

RTL0.3N9 27.0 (1/1) 0.3 miles 270° (27-27) 19.3 (16/16)

(14-28) 0 Garden Vegetables (pCi/kg)

-spec (4) 60Co 60

<LLD

<LLD

<LLD 0

137Cs 60

<LLD

<LLD

<LLD 0

134Cs 60

<LLD

<LLD

<LLD 0

a Mean and Range based upon detectable measurements only. Fraction of detectable measurements at specified locations is indicated in parentheses. (f) b LLD values from Table E-2. See page E-8, SENSITIVITY OF THE REMP MEASUREMENT PROCESS, for information on determining LLD and Minimum Detectable Activity (MDA).

TABLE 2 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM ANNUAL

SUMMARY

Name of Facility Rancho Seco Nuclear Station Docket No. DPR-54/ SNM 2510 Location of Facility Sacramento, California. Reporting Period January - December 2008 (County, State)

Rancho Seco Nuclear Station 13 2008 AREOR Medium or Pathway Sampled (Unit of Measurement)

Type and Total Number of Analysis Performed Lower Limit of Detection (LLD) b All Indicator Locations Mean (f) a Range Location with Highest Annual Mean Name Mean (f) a Distance Range

& Direction Control locations Mean (f) a Range Number of Nonroutine Reported Measurements Sediment (pCi/kg)

-spec (12) 60Co 150 8.45 (1/12)

(8.45-8.45)

RMS0.6MO 8.45 (1/8) 0.6 miles 248° (8.45-8.45)

NA 0

137Cs 150 104.9 (12/12)

(19.1-252)

RMS0.6MO 138.5 (8/8) 0.6 miles 248° (50.7-252)

NA 0

134Cs 150

<LLD

<LLD NA 0

Fish (pCi/kg)

-spec (3) 54Mn 130

<LLD

<LLD NA 0

60Co 130

<LLD

<LLD NA 0

65Zn 260

<LLD

<LLD NA 0

137Cs 130 24.6 (1/3)

(<8.14 - 24.6)

RFS0.6NO 24.6 (1/3) 0.6 miles 270° (<8.14-24.6)

NA 0

134Cs 130

<LLD

<LLD NA 0

a Mean and Range based upon detectable measurements only. Fraction of detectable measurements at specified locations is indicated in parentheses. (f) b LLD values from Table E-2. See page E-8, SENSITIVITY OF THE REMP MEASUREMENT PROCESS, for information on determining LLD and Minimum Detectable Activity (MDA).

TABLE 2 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM ANNUAL

SUMMARY

Name of Facility Rancho Seco Nuclear Station Docket No. DPR-54/ SNM 2510 Location of Facility Sacramento, California. Reporting Period January - December 2008 (County, State)

Rancho Seco Nuclear Station 14 2008 AREOR Medium or Pathway Sampled (Unit of Measurement)

Type and Total Number of Analysis Performed Lower Limit of Detection (LLD) b All Indicator Locations Mean (f) a Range Location with Highest Annual Mean Name Mean (f) a Distance Range &

Direction Control locations Mean (f) a Range Number of Nonroutine Reported Measurements Well Water (pCi/L)

Gross (8) 4 3.51 (2/4)

(<2.28-3.51)

RWW0.3EO 3.51 (2/4) 0.3 miles 90°

(<2.28-3.51) 2.96 (2/4)

(<1.93-3.09) 0 Tritium (8) 1000

<LLD

<LLD

<LLD 0

-spec (8) 54Mn 15

<LLD

<LLD

<LLD 0

60Co 15

<LLD

<LLD

<LLD 0

65Zn 30

<LLD

<LLD

<LLD 0

137Cs 10

<LLD

<LLD

<LLD 0

134Cs 10

<LLD

<LLD

<LLD 0

Runoff Water (pCi/L)

Tritium (29) 2000

<LLD

<LLD NA 0

-spec (29) 54Mn 15

<LLD

<LLD NA 0

60Co 15

<LLD

<LLD NA 0

65Zn 30

<LLD

<LLD NA 0

137Cs 18

<LLD

<LLD NA 0

134Cs 15

<LLD

<LLD NA 0

a Mean and Range based upon detectable measurements only. Fraction of detectable measurements at specified locations is indicated in parentheses. (f) b LLD values from Table E-2. See page E-8, SENSITIVITY OF THE REMP MEASUREMENT PROCESS, for information on determining LLD and Minimum Detectable Activity (MDA).

TABLE 2 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM ANNUAL

SUMMARY

Name of Facility Rancho Seco Nuclear Station Docket No. DPR-54/ SNM 2510 Location of Facility Sacramento, California. Reporting Period January - December 2008 (County, State)

Rancho Seco Nuclear Station 15 2008 AREOR Medium or Pathway Sampled (Unit of Measurement)

Type and Total Number of Analysis Performed Lower Limit of Detection (LLD) b All Indicator Locations Mean (f) a Range Location with Highest Annual Mean Name Mean (f) a Distance Range

& Direction Control locations Mean (f) a Range Number of Nonroutine Reported Measurements Surface Water (pCi/L)

Tritium (64) 2000

<LLD

<LLD

<LLD 0

-spec (64) 54Mn 15

<LLD

<LLD

<LLD 0

60Co 15

<LLD

<LLD

<LLD 0

65Zn 30

<LLD

<LLD

<LLD 0

137Cs 18

<LLD

<LLD

<LLD 0

134Cs 15

<LLD

<LLD

<LLD 0

Drinking Water (pCi/L)

Gross (36) 4 3.55 (22/24)

(2.17-5.85)

RDW0.1GO 3.89 (11/12) 0.1 miles 135° (2.17-5.85) 4.07 (11/12)

(3.03-6.09) 0 Tritium (36) 1000

<LLD

<LLD

<LLD 0

-spec (36) 54Mn 15

<LLD

<LLD

<LLD 0

60Co 15

<LLD

<LLD

<LLD 0

65Zn 30

<LLD

<LLD

<LLD 0

137Cs 10

<LLD

<LLD

<LLD 0

134Cs 10

<LLD

<LLD

<LLD 0

a Mean and Range based upon detectable measurements only. Fraction of detectable measurements at specified locations is indicated in parentheses. (f) b LLD values from Table E-2. See page E-8, SENSITIVITY OF THE REMP MEASUREMENT PROCESS, for information on determining LLD and Minimum Detectable Activity (MDA).

Rancho Seco Nuclear Station 16 2008 AREOR V. REFERENCES CFRa Code of Federal Regulations, 2008, "National Primary Drinking Water Regulations," Title 40, Part 141.

CFRb Code of Federal Regulations, 2008, "Standards for Protection Against Radiation," Title 10, Part 20.

CFRc Code of Federal Regulations, 2008, "Domestic Licensing of Production and Utilization Facilities," Title 10, Part 50.

CFRd Code of Federal Regulations, 2008, "Environmental Radiation Protection Standards for Nuclear Power Operations," Title 40, Part 190.

CFRe Code of Federal Regulations, 2008, "Licensing Requirements for the Independent Storage of Spent Nuclear Fuel, High Level Radioactive Waste, and Reactor-Related Greater than Class C Waste," Title 10, Part 72.

NRC74 United States Nuclear Regulatory Commission, 1974, "Permanently Defueled Technical Specifications for the Rancho Seco Nuclear Station," Appendix A to Facility License No. DPR-54 (as amended).

NRC 00 United States Nuclear Regulatory Commission, 2000, Rancho Seco Nuclear Generating Station, "License for Independent Storage of Spent Nuclear Fuel and High Level Radioactive Waste," SNM-2510. (as amended)

NRC77 United States Nuclear Regulatory Commission, 1977, "Calculation of Annual Doses to Man from Routine Releases of Reactor Effluents for the Purpose of Evaluating Compliance with 10 CFR Part 50, Appendix I," Regulatory Guide 1.109, Revision 1.

NRC79a United States Nuclear Regulatory Commission, 1979, "An Acceptable Radiological Environmental Monitoring Program," Branch Technical Position, Revision 1.

NRC79b United States Nuclear Regulatory Commission, 1979, "Quality Assurance for Radiological Monitoring Programs (Normal Operations) -

Effluent Streams and the Environment," Regulatory Guide 4.15, Revision 1.

NRC92 United States Nuclear Regulatory Commission, "Air Sampling in the Workplace", Regulatory Guide 8.25, June 1992 NUREG79 United States Nuclear Regulatory Commission, 1979, "Radiological Effluent Technical Specifications for PWRs," NUREG-0472, Revision 2.

Rancho Seco Nuclear Station 17 2008 AREOR V.

REFERENCES (continued)

NUREG80a United States Nuclear Regulatory Commission, 1980, "Methods for Demonstrating LWR Compliance with the EPA Uranium Fuel Cycle Standard (40 CFR Part 190)," NUREG-0543.

RS01 Rancho Seco Nuclear Station, 2008, "Annual Radioactive Effluent Release Report, January -December 2008," Sacramento Municipal Utility District report.

RS02 Rancho Seco Quality Control Manual, Appendix A

Rancho Seco Nuclear Station 18 2008 AREOR VI. APPENDICES

Rancho Seco Nuclear Station A-1 2008 AREOR APPENDIX A 2007/2008 LAND USE CENSUS RESULTS In compliance with the Rancho Seco Quality Manual [RS02] and the REMP Manual, section 4.0, "Land Use Census", a land use census was completed in March 2009. The method of conducting the primary survey was to use an aerial survey that was conducted during June 2008. Evaluating the aerial photographs continues to provide an accurate method of determining locations and distances of the nearest residences. The aerial photos also provided a method to identify any changes in the agricultural, commercial, residential, or industrial use of the land surrounding the site. The use of conservative dose factors for the purpose of projected dose calculations still requires that we evaluate the use of the area surrounding the site. The information that is presented is to verify this assumption and validate the process.

The land use census covered an area bounded by each of the sixteen meteorological sectors out to a two-mile radius from the Reactor Building.

The 2007/ 2008 Land Use Census did not identify any changes in the use of the unrestricted areas that would require modifications in the Radiological Environmental Monitoring Program for evaluating doses to individuals from principal pathways of exposure. This evaluation and determination are in accordance with the requirements of 10 CFR Part 50, Appendix I, section IV.B.3.

Rancho Seco Nuclear Station A-2 2008 AREOR A.

RESIDENT EXPOSURE PATHWAY

SUMMARY

Inhalation, Ground Plane and Water Consumption The 2007/ 2008 census determined that seven of the 16 radial sectors have residences that are within the 2-mile (3219 meters) Land Use Census radius. The closest residence in each of the seven sectors is identified below:

Sector Distance (meters)

Ranking (Nearest to Farthest)

A

>3219 NA B

>3219 NA C

1432 3

D 1175 1

E

>3219 NA F

>3219 NA G

2381 6

H

>3219 NA J

>3219 NA K

2320 5

L 1207 2

M 2028 4

N 3181 7

P

>3219 NA Q

>3219 NA R

>3219 NA It is expected that all seven residences use well water for consumption and other domestic purposes.

Rancho Seco Nuclear Station A-3 2008 AREOR B.

DEPOSITION EXPOSURE PATHWAY

SUMMARY

Beef Consumption Based on conservative dose calculation parameters in use, the following is a summary for the 2003/ 2004 land use census of the potential deposition exposure pathways at the locations listed below:

Sector Distance (meters)

Consumption Pathway Comment A

433 Beef Unrestricted Area Boundary B

430 Beef Unrestricted Area Boundary C

531 Beef Unrestricted Area Boundary D

451 Beef Unrestricted Area Boundary E

483 Beef Unrestricted Area Boundary F

499 Beef Unrestricted Area Boundary G

579 Beef Unrestricted Area Boundary H

198 Beef Unrestricted Area Boundary J

195 Beef Unrestricted Area Boundary K

195 Beef Unrestricted Area Boundary L

286 Beef Unrestricted Area Boundary M

404 Beef Unrestricted Area Boundary N

514 Beef Unrestricted Area Boundary P

708 Beef Unrestricted Area Boundary Q

579 Beef Unrestricted Area Boundary R

448 Beef Unrestricted Area Boundary Due to the revision of the ODCM, which eliminated the gaseous effluent pathway (August 26, 2002), the Deposition Exposure Pathway is not considered a credible evaluation with current plant conditions.

Rancho Seco Nuclear Station A-4 2008 AREOR C.

OTHER EXPOSURE PATHWAYS The 2007/2008 Land Use Census confirmed previous knowledge that the Clay/ Laguna Creeks are utilized by the general public for aquatic life consumption purposes. Based on direct observation cattle consume water from the Clay, Hadselville, and Laguna Creeks.

D.

REMP EVALUATION An objective of the 2007/ 2008 Land Use Census was to compare census and current REMP Manual locations to ensure consistency exists between monitoring activities and actual land utilization. The following discussion is a summary of the comparison evaluation for each of the four exposure pathways.

Resident Exposure Pathway Luxel dosimetry and air particulate sampling and analysis monitor the inhalation and ground plane exposure pathways, the principal components of the Resident Exposure Pathway, directly and indirectly. Well water was monitored at two locations.

Since the existing REMP was more conservative with respect to Resident Exposure Pathway monitoring, no changes were required.

Deposition Exposure Pathway The Deposition Exposure Pathway is monitored directly within the Station Site Boundary through garden vegetation sampling and analysis. The potential for a deposition pathway has been evaluated by the ODCM and REMP programs and found to have little potential for the current plant status. Since the current REMP was representative and conservative with respect to Deposition Exposure Pathway monitoring, no changes were required.

Irrigated Crop Exposure Pathway The REMP was effective in monitoring the identified irrigated crop exposure pathways. This conclusion was because the REMP included irrigated vegetation sampling.

REMP surface water surveillance activities monitor irrigation water radiological quality.

Current ODCM calculations are conservative since dilution effects are not included when predicting potential dose delivered through downstream pathways.

Rancho Seco Nuclear Station A-5 2008 AREOR E.

REMP EVALUATION (continued)

Other Exposure Pathways Existing aquatic life, surface water and sediment sampling analysis practices are effective in monitoring potential observable effects associated with recreational activities occurring at the Clay Creek, Hadselville Creek, Laguna Creek, Folsom South Canal and Rancho Seco Lake.

With respect to availability and quantity of food sources, the other identified consumption activities were considered inconsequential for pathway monitoring purposes.

No REMP changes were required to monitor other exposure pathways.

F.

ODCM EVALUATION Based on 2007/2008 Land Use Census findings, the following potential exposure pathways exist at the indicated locations:

LIQUID EFFLUENT Exposure Pathway Location Comment Freshwater Fish Clay Creek Recreation beyond the Site Boundary Swimming Clay Creek Recreation beyond the Site Boundary Shoreline Deposits Clay Creek Recreation beyond the Site Boundary Irrigated vegetation Clay Creek Commercial vineyards and potential residences beyond the site boundary Irrigated forage Clay Creek Cattle grazing beyond the Site Boundary Drinking Water Clay Creek Cattle drinking water beyond the Site Boundary Specifying the Laguna Creek location also provides additional conservatism since the beneficial effects of downstream dilution are not considered when specifying effluent release restrictions.

Rancho Seco Nuclear Station B-1 2008 AREOR APPENDIX B SAMPLE SITE DESCRIPTIONS AND MAPS This appendix provides descriptive information about the sampling locations and maps of all the locations for the Radiological Environmental Monitoring Program sites.

Table B-1 provides information on sample type, identification codes, and map location references. The sample identification code is an alphanumeric string beginning with the prefix "R" (for Rancho Seco Nuclear Station) followed by two letters to identify the sample media:

AS Air MS Mud and Silt RW Runoff Water FS Fish SW Surface Water LV Garden Vegetable DW Drinking Water TL Direct Gamma Radiation (Luxel)

WW Well Water The numeric designations, which follow the letter designations, indicate the straight-line distance (in miles) from the center of the Reactor Building to the monitoring site.

The next letter designates the sector in which the monitoring location is located. The letters A through R are used for sector designators. The letters I and O are not used to prevent confusion with the numbers one and zero in the ID codes.

Sector Letter Degrees Azimuth Compass Point A

348.75 to 11.25 N

B 11.25 to 33.75 NNE C

33.75 to 56.25 NE D

56.25 to 78.75 ENE E

78.75 to 101.25 E

F 101.25 to 123.75 ESE G

123.75 to 146.25 SE H

146.25 to 168.75 SSE J

168.75 to 191.25 S

K 191.25 to 213.75 SSW L

213.75 to 236.25 SW M

236.25 to 258.75 WSW N

258.75 to 281.25 W

P 281.25 to 303.75 WNW Q

303.75 to 326.25 NW R

326.25 to 348.75 NNW

Rancho Seco Nuclear Station B-2 2008 AREOR SAMPLE SITE DESCRIPTIONS AND MAPS (Continued)

The final letter designation indicates if the location is part of the operational REMP program

("O") or post-operational REMP program ("P").

Table B-1 Lists each location referencing the sample type and the location ID code to the map site number on one of the four Radiological Environmental Monitoring Site Maps included in this Appendix.

Figure B-1 Site Location Map: Shows the locations of the sample locations on and/or near the Site (including Storm Drain locations).

Figure B-2 1 Mile Radius map: Sampling locations within one mile of the Reactor Building centerline are shown on this map.

Figure B-3 5 Mile Radius map: Sampling locations between one and five miles from the Reactor Building centerline are shown on this map.

Figure B-4 25 Mile Radius map: Sampling locations between five to 25 miles from the Reactor Building centerline are shown on this map.

Rancho Seco Nuclear Station B-3 2008 AREOR Figure B-1 Radiological Environmental Sampling Locations on and near the Site (Storm Drain location numbers are in parenthesis) 65 66 67 68 69

Rancho Seco Nuclear Station B-4 2008 AREOR Figure B-2 Radiological Environmental Sampling Locations within 1 mile from the Reactor Building

Rancho Seco Nuclear Station B-5 2008 AREOR Figure B-3 Radiological Environmental Sampling Locations from 1 to 5 miles from the Reactor Building

Rancho Seco Nuclear Station B-6 2008 AREOR Figure B-4 Radiological Environmental Sampling Locations 5 to 25 miles from the Reactor Building

Rancho Seco Nuclear Station B-7 2008 AREOR Table B-1 Radiological Environmental Monitoring Sites and Map Locations Sample Type ID Code Class Map Location No.

Collection Frequency Description. of Location Miles Sector AIR RAS0.1CO IND.

1 Weekly On Site-PAP BLDG.

0.1 C

AIR RAS0.7EO CON 2

Weekly Meteorological Tower 0.7 E

AIR RAS0.3MO IND.

3 Weekly Effluent Discharge 0.3 M

RUNOFF WATER RRW0.6MO IND.

5 Biweekly Site Boundary 0.6 M

SURFACE WATER RSW0.7NO IND.

6 Monthly Water Sump 0.7 N

SURFACE WATER RSW1.3FO CON 7

Monthly Rancho Seco Reservoir 1.3 F

SURFACE WATER RSW3.7NO CON 8

Monthly Composite ISCO Composite Sampler at Folsom South Canal 3.7 N

SURFACE WATER RSW0.3MO IND.

3 Monthly Composite ISCO Composite Sampler at Effluent Discharge 0.3 M

SURFACE WATER RSW1.8NO IND.

9 Monthly Confluence of Clay and Hadselville Creeks 1.8 N

DRINKING WATER RDW0.1GO IND.

10 Monthly Rancho Seco Site 0.1 G

DRINKING WATER RDW1.8FP CON 30 Monthly Rancho Seco Lake Well 1.8 F

DRINKING WATER RDW0.2PP IND 65 Monthly SAS Well 0.2 P

WELL WATER RWW0.3EO IND.

11 Quarterly Site Well 0.3 E

WELL WATER RWW0.8DO CON 12 Quarterly Marciel Ranch 0.8 D

Rancho Seco Nuclear Station B-8 2008 AREOR Table B-1 (Continued)

Radiological Environmental Monitoring Sites and Map Locations Sample Type ID Code Class Map location No.

Collection Frequency Description. of Location Miles Sector MUD AND SILT RMS0.3MO IND.

3 Quarterly Effluent Discharge 0.3 M

MUD AND SILT RMS0.6MO IND.

5 Quarterly Site Boundary 0.6 M

FISH RFS0.3MO IND.

3 Semi-Annual Effluent Discharge 0.3 M

FISH RFS0.6MO IND.

5 Semi-Annual Site Boundary 0.6 M

FISH RFS0.7NO IND.

6 Semi-Annual Water Sump 0.7 N

FISH RFS1.5FO CON 7

Semi-Annual Rancho Seco Reservoir 1.5 F

FISH RFS1.8NO IND.

9 Semi-Annual Confluence of Clay and Hadselville Creeks 1.8 N

GARDEN VEGETABLES RLV0.6MO IND.

5 Semi-Annual Site Boundary Garden irrigated with No-Name Creek water 0.6 M

GARDEN VEGETABLES RLVXX.XX CON NA Semi-Annual Truck Garden which provides local produce from the local area NA NA

Rancho Seco Nuclear Station B-9 2008 AREOR Table B-1 (Continued)

Radiological Environmental Monitoring Sites and Map Locations Sample Type ID Code Class Map Location No.

Collection Frequency Description of Location Miles Sector LUXEL RTL0.3RO IND.

31 Quarterly NNW @ Perimeter Fence N/O Spray Ponds; #1 0.3 R

LUXEL RTL0.3C0 IND.

32 Quarterly NE Perimeter Fence/ parking lot NE corner; #2 0.3 C

LUXEL RTL0.3NO IND.

17 Quarterly W Perimeter Fence road/ pole/ top of hill; #3 0.3 N

LUXEL RTL0.3LO IND.

20 Quarterly SW Perimeter Fence road near RS lake filters; #4 0.3 L

LUXEL RTL0.3HO IND.

33 Quarterly Perimeter Fence/ S/O of Admin. Bldg.; #5 0.3 H

LUXEL RTL0.4F0 IND.

34 Quarterly Photovoltaic Facility/ North Fence (NRC); #6 0.4 F

LUXEL RTL0.5CO IND.

35 Quarterly Rt. 104 entrance to Rancho Seco; #7 0.5 C

LUXEL RTL0.6KO IND.

36 Quarterly Tokay Substation; #11 0.8 K

LUXEL RTL2.7MO IND.

14 Quarterly In Clay at Tipling's Residence 11633 Clay Station Rd; #16 2.1 M

LUXEL RTL8.2KO CON.

37 Quarterly Elliott Cemetery Near Angelo Dairy; #17 8.2 K

LUXEL RTL7.8CO CON.

38 Quarterly Sam Jaber Residence/ 601 Carbondale Rd/ Ione; #18 7.8 C

LUXEL RTL0.7GO IND.

30 Quarterly Well pump fence @ reservoir; #43 1.7 G

LUXEL RTL1.5MO IND.

40 Quarterly Clay East & Kirkwood (NRC); #20 1.5 M

LUXEL RTL3.9KO IND.

41 Quarterly SSW of Site on Borden Rd; #26 3.9 K

LUXEL RTL7.4MO CON.

42 Quarterly Herald Fire Station #87/ 12746 Ivie Rd; #30 7.4 M

LUXEL RTL3.7NO IND.

43 Quarterly Folsom South Canal near Hobday Rd; #31 3.7 N

LUXEL RTL3.8MO IND.

44 Quarterly BLM entrance to Folsom South Canal Pumping Station; #33 3.8 M

LUXEL RTL1.9NO IND.

9 Quarterly Hadselville Cr. & Clay Cr.; #35 1.9 N

Rancho Seco Nuclear Station B-10 2008 AREOR Table B-1 (Continued)

Radiological Environmental Monitoring Sites and Map Locations Sample Type ID Code Class Map Location No.

Collection Frequency Description of Location Miles Sector LUXEL RTL1.8F0 IND.

45 Quarterly Rancho Seco Lake Maintenance Building, #19 1.8 F

LUXEL RTL1.4DO IND.

46 Quarterly 0.9 Miles E/O Site on Twin Cities Road/ Rt. 104; #46 1.4 D

LUXEL RTL8.0PO CON.

47 Quarterly Dillard School; #55 8.0 P

LUXEL RTL0.8DO IND.

12 Quarterly Marciel Ranch; 14626 Twin Cities Rd; #63 0.8 D

LUXEL RTL0.6MO IND.

5 Quarterly Site Boundary Irrigated Garden; #65 0.6 M

LUXEL RTL0.4NO IND.

29 Quarterly Depression @ Clay Creek; #66 0.4 N

LUXEL RTL0.4NO1 IND.

29 Quarterly Soil Pile @ Clay Creek; #67 0.4 N

LUXEL RTL0.3PO IND.

48 Quarterly West Fence; #68 0.3 P

LUXEL RTL0.3NP IND.

53 Quarterly West Garden, #88 0.3 N

LUXEL RTL0.4NP IND.

54 Quarterly Southwest ISFSI, #89 0.4 N

LUXEL RTL0.5NP IND.

55 Quarterly Northwest ISFSI, #90 0.5 P

LUXEL RTL0.3QP IND.

56 Quarterly Northeast ISFSI, #91 0.3 Q

LUXEL RTL0.7QP IND.

59 Quarterly Highway 104 at the rail spur on pole, #92 0.7 Q

LUXEL RTL0.7JP IND.

61 Quarterly Clay East Road on pole south of site boundary, #93 0.7 J

LUXEL RTL0.4PP IND.

62 Quarterly ISFSI ALARA fence north side, #94 0.4 P

LUXEL RTL0.2PP IND.

65 Quarterly SAS/ IOSB Well #95 0.2 P

LUXEL RTL0.2NP IND 66 Quarterly IOSB Electrical Transformer, SE corner #96 0.2 P

LUXEL RTL0.3NP IND 66 Quarterly IOSB roof access ladder, #97 0.3 P

LUXEL RTL0.2NP IND 67 Quarterly Switchyard Fence north side, #98 0.2 N

LUXEL RTL0.3NP IND 68 Quarterly ISFSI 100 meter fence, gate access, north gate corner, #99 0.3 N

LUXEL RTL0.3NP IND 69 Quarterly Access road NW of IOSB on fence, #100 0.3 N

Rancho Seco Nuclear Station C-1 2008 AREOR APPENDIX C QUALITY CONTROL SAMPLE ANALYSIS RESULTS QUALITY ASSURANCE AND CONTROL Implementation of the Radiological Environmental Monitoring Program (REMP) consists of a number of discrete steps including:

Sample collection, Packaging, Shipment and receipt, Measurements of radioactivity, Data evaluation, and Reporting.

These program elements are performed according to approved, written procedures to assure the validity of REMP results. This section discusses the internal quality control measurements made by the analysis laboratory, Eberline Services, and the results of their participation in the Interlaboratory Comparison Program implemented by the National Institute of Standards Testing (NIST). The Interlaboratory Comparison Program and the analysis laboratories Quality Assurance Programs provide information on the validity (accuracy and precision) of the REMP implementation steps listed above.

Because REMP measurement validity is important for evaluating protection of the health and safety of the public, RSNS has established an Environmental Quality Assurance Program (EQAP) for radiological environmental measurements. The Environmental QA Program implements the guidance provided in Regulatory Guide 4.15, (NRC79a).

INTERLABORATORY COMPARISON PROGRAM The ICP is a radiological analysis quality control program implemented by NIST and provided by vendor laboratories. Eberline Services participates in an ICP provided by Environmental Resources Associates (ERA). Eberline Services also participates in the Department of Energy (DOE) Mixed Analyte Performance Evaluation Program (MAPEP). Participation in an ICP is a requirement of the Rancho Seco Quality Manual (RS02), section 1.4.3.2. It provides for an independent check of the proficiency of the laboratory. It also provides information on the precision and accuracy of measurements of radioactive material in REMP samples by Eberline Services. The extent of Eberline Services participation in this program includes all of the environmental radioactivity determinations that are related to the analyses required by the REMP manual.

Rancho Seco Nuclear Station C-2 2008 AREOR INTERLABORATORY COMPARISON PROGRAM (Continued)

The Intercomparison Program consists of sample media spiked with known quantities of specific radioactive materials at levels normally found in environmental samples. Most samples require long counting times to determine if any activity is present, and the results may have large deviations from the mean. When the samples are distributed, there is an implied precision requirement given in terms of the analysis requested to be performed. After the labs provide the results of their analyses, an ERA laboratory provides a statistical summary of all the results by the participating laboratory. This report includes the acceptance control limits, the mean of all laboratories and the standard deviation of the results by all labs, among other statistics. The same process is applicable for the MAPEP samples.

If the results of a determination by Eberline Services in the ICP are outside the specified control limits or do not pass the outliers test, Eberline Services must investigate, evaluate why the outlier occurred, and take appropriate corrective action to prevent problem recurrence.

During 2008, Eberline Services analyzed 14 ICP samples (ERA RAD-74), 3 ICP samples (ERA RAD-75, corrective action), 14 ICP samples (MAPEP-07), and 13 ICP samples (MAPEP-19) related to the current REMP program.

In ERA RAD-74, Sr-89 (water) (CAR08-19) and Radium-228 (water) (CAR 08-20) were unacceptable. Eberline completed ERA RAD-75 as part of the CAR with acceptable results.

MAPEP-07 was completed with acceptable results.

In MAPEP-19, Am-241 (water (CAR 08-28) and Pu-239/240 (water) (CAR 08-29) were unacceptable. The CARs were completed with acceptable results.

The Eberline Services measurement results are presented in Table C-1 along with the acceptable values for each test.

INTRALABORATORY QUALITY ASSURANCE PROGRAM Eberline Services, by contract, also conducts an Intralaboratory Comparison Program (Quality Assurance Program) to maintain an acceptable quality level on a routine basis.

As part of their Quality Assurance Program, the laboratory performs background counts, an analysis of spiked samples, and duplicate sample counts for every ten Rancho Seco REMP samples analyzed. These quality control procedures are performed for all analyses except gamma spectrometry, for which weekly energy and efficiency checks are performed.

Personnel not directly involved with the analysis prepare the spiked and duplicate samples.

Spiked samples, as well as the radioactive sources used for the gamma spectrometer checks, are traceable to the National Institute for Standards and Technology (NIST).

Rancho Seco Nuclear Station C-3 2008 AREOR RANCHO SECO AUDIT AND SURVEILLANCE RESULTS The Rancho Seco Quality Program requires periodic audits of REMP activities, including Eberline Services. Contract laboratory performance is evaluated by the Rancho Seco QA Department and an Approved Vendor List is created from these audits. Audits are either conducted by Rancho Seco QA staff or by reviewing audits conducted by other facilities (NUPIC audit review). Eberline Services is currently on the approved suppliers list.

CONCLUSIONS The Intralaboratory and Interlaboratory results provided by Eberline Services indicate that Eberline Services performance was acceptable.

DIRECT RADIATION (Luxel) COMPARISON PROGRAM The monitoring badge vendor, Landauer participates in a comparison program provided by the Idaho National Environmental Laboratory (INEL). INEL did not conduct this comparison program in 2008; therefore no results from that program are available for this report. Landauer also maintains NVLAP certification with NIST. A review of Landauers NVLAP certification results indicates that Landauer has satisfactorily completed all of the required tests for the types of environmental radiation monitored at RSNS and is certified through December 31, 2008.

This comparison program satisfies the requirement of the REMP manual section 6.0.

Rancho Seco Nuclear Station C-4 2008 AREOR TABLE C-1 2008 INTERLABORATORY COMPARISON PROGRAM Sample Type (ERA RAD-74)

Report Date Assay Type ERA Result (pCi/L)

Eberline Result (pCi/L)

Control Limits (pCi/L)

Water 9/5/08 Sr-89 28.7 36.8

• 20.4-35.3 Water 9/5/08 Sr-90 40.0 32.9 29.4-46.0 Water 9/5/08 Ba-133 46.6 41.9 38.1-51.8 Water 9/5/08 Cs-134 93.2 101.1 76.6-102 Water 9/5/08 Cs-137 54.6 54.9 49.1-62.9 Water 9/5/08 Co-60 25.7 26.6 22.3-31.0 Water 9/5/08 Zn-65 98.8 108.8 88.9-118 Water 9/5/08 Gross Alpha 30.7 29.0 15.7-40.0 Water 9/5/08 Gross Beta 25.8 25.4 16.1-33.7 Water 9/5/08 Radium-226 8.08 8.37 6.07-9.51 Water 9/5/08 Radium-228 7.42 9.81

• 4.69-9.48 Water 9/5/08 Uranium(Nat) 11.3 11.2 8.85-13.0 Water 9/5/08 Uranium (Nat) mass 16.6 16.3 13.0-19.1 Water 9/5/08 Tritium 3720 3599 3160-4100 Water (RAD-75) 12/4/08 Sr-89 48.7 50.5 38.2-56.1 Water (RAD-75) 12/4/08 Sr-90 33.6 31.4 24.6-38.8 Water (RAD-75) 12/4/08 Radium-228 14.1 14.6 9.38-17.1

Rancho Seco Nuclear Station C-5 2008 AREOR TABLE C-1 (cont.)

2008 INTERLABORATORY COMPARISON PROGRAM Sample Type (MAPEP-07)

Report Date Assay Type INL Result (Bq/sample)

Eberline Result (Bq/sample)

Control Limits (Bq/sample)

Vegetation 8/08 Cs-134 5.5 5.03 3.9-7.2 Vegetation 8/08 Cs-137 0.25 Vegetation 8/08 Co-57 7.1 7.2 5.0-9.2 Vegetation 8/08 Co-60 4.7 4.21 3.3-6.1 Vegetation 8/08 Mn-54 5.8 5.42 4.1-7.5 Vegetation 8/08 Zn-65 6.9 6.93 4.8-9.0 Air Filter 8/08 Gross Alpha 0.006 Air Filter 8/0/

Gross Beta 0.525 0.572 0.263-0.788 Air Filter 8/08 Cs-134 2.63 2.97 1.84-3.42 Air Filter 8/08 Cs-137 0.8 Air Filter 8/08 Co-57 1.50 1.59 1.05-1.95 Air Filter 8/08 Co-60 0.83 Air Filter 8/08 Mn-54 2.64 3.0 1.85-3.43 Air Filter 8/08 Zn-65 0.94 1.05 0.66-1.22

Rancho Seco Nuclear Station C-6 2008 AREOR TABLE C-1 (cont.)

2008 INTERLABORATORY COMPARISON PROGRAM Sample Type (MAPEP-19)

Report Date Assay Type INL Result (Bq/L)

Eberline Result (Bq/L)

Control Limits (Bq/L)

Water 8/08 Gross Alpha

<0.56 0.10 Water 8/08 Gross Beta

<1.85 0.08 Water 8/08 Cs-134 19.5 20.7 13.7-25.4 Water 8/08 Cs-137 23.6 24.1 16.5-30.7 Water 8/08 Co-57 0.3 Water 8/08 Co-60 11.6 11.4 8.1-15.1 Water 8/08 Tritium 341 319.5 239-443 Water 8/08 Fe-55 46.2 55.8 32.3-60.1 Water 8/08 Ni-63 0.35 Water 8/08 Tc-99 3.76 3.42 2.63-4.89 Water 8/08 Zn-65 17.1 18.1 12.0-22.2 Water 8/08 Am-241 0.029 False positive Water 8/08 Pu-239/ 240 0.026 False positive

Rancho Seco Nuclear Station C-7 2008 AREOR TABLE C-1 (cont.)

2008 INTERLABORATORY COMPARISON PROGRAM Sample Type (MAPEP-19)

Report Date Assay Type INL Result (Bq/kg)

Eberline Result (Bq/kg)

Control Limits (Bq/kg)

Soil 8/08 Cs-134 581 581 407-755 Soil 8/08 Cs-137 2.8 5.6 Statistically zero result Soil 8/08 Co-57 333 351.9 233-433 Soil 8/08 Co-60 145 148.6 102-189 Soil 8/08 Fe-55 676 Not Reported 473-879 Soil 8/08 Mn-54 415 439.3 291-540 Soil 8/08 Ni-63 760 697 532-988 Soil 8/08 K-40 570 599.1 399-741 Soil 8/08 Tc-99 335 288 235-436 Soil 8/08 Zn-65 10 Soil 8/08 Pu-238 1.29

• False Positive

Rancho Seco Nuclear Station D-1 2008 AREOR APPENDIX D SAMPLE COLLECTION AND ANALYSIS METHODS For each of the sample media collected, the method of collection is documented in Rancho Seco Nuclear Station procedures. Detailed analysis methods are documented in procedures controlled by the contract laboratory, Eberline Services. A brief description of these collection and analysis methods is included in this Appendix.

Sample Media Collection/Analysis Method AIR An air sampler continuously moves air through a filter paper designed to capture particulates by filter paper impaction. The air samplers are equipped with an elapsed time meter and flow gauge, which are used to calculate the volume of air that has passed through the filter paper.

The filter paper is exchanged weekly. At least one day is allowed to elapse between sample collection and counting to reduce the interference of naturally occurring radon and thorium daughters on the sample analysis. The filter paper is assayed for gross beta radioactivity by placing the filter on a stainless steel planchet and counted with an internal gas flow proportional counter.

The individual particulate filter papers are saved over a calendar quarter and the composite collection is assayed for gamma isotopic radioactivity by gamma spectroscopy.

DIRECT RADIATION Monitoring badges, (Luxels), are located within a ten (10) mile radius of the site. The badges within a five (5) mile radius are considered indicator badges. Two (2) badges are placed at each monitoring location to assure adequate data recovery and to improve measurement statistics. The badge field exposure cycle is approximately ninety (90) days. At the end of the field exposure cycle, the badges are exchanged and returned to the contract laboratory for processing.

Rancho Seco Nuclear Station D-2 2008 AREOR Sample Media Collection/Analysis Method SEDIMENT Samples of sediment are collected from the top three inches of the sampled material on a quarterly schedule. Sediment samples are obtained approximately two feet from the shoreline. Each sample is assayed directly for gamma isotopic radioactivity by gamma spectroscopy.

GARDEN PRODUCE Samples of vegetables are collected semi-annually from a garden, which is maintained at the Station Site Boundary. Control location samples are collected from a local commercial vendor. The vegetables are assayed directly for gamma isotopic radioactivity by gamma spectroscopy.

FISH Fish are collected semi-annually from the Clay Creek system. The dissected (edible) portion of each sample is assayed directly for gamma isotopic radioactivity by gamma spectroscopy.

WATER 1-liter grab samples of water from locations in the liquid effluent pathway and groundwater are collected as follows:

Surface water and Drinking water are collected monthly Runoff water is collected biweekly Well water is collected quarterly.

At two locations, samples are obtained to provide a monthly composite sample. All samples are assayed for tritium by liquid scintillation counting and for gamma isotopic radioactivity by gamma spectroscopy.

Drinking and Well water samples are analyzed for Gross Beta activity.

Rancho Seco Nuclear Station E-1 2008 AREOR APPENDIX E ENVIRONMENTAL MONITORING PROGRAM DESIGN PROGRAM BASIS The Sacramento Municipal Utility District conducts a continuous Radiological Environmental Monitoring Program (REMP) at the Rancho Seco Nuclear Station to assess the impact of Station operation on the surrounding environment. The current Post-Operational REMP is a continuation of a similar program initiated prior to and during operation of the Station. Samples of the surrounding environment are collected on a routine basis and analyzed to determine the amount of radiation and radioactive materials present in the exposure pathways.

During 2008 the program was directed and executed by the Radiation Protection/ Chemistry Superintendent. Decommissioning Chemistry/ Radiation Protection Technicians perform sample collection. The Radiological Health Supervisor performs data review and Program maintenance/ oversight. The Program is operated with primary accountability and cognizance of the Manager, Plant Closure and Decommissioning.

The Program is designed consistent with Title 10, Code of Federal Regulations, Part 50, Appendix I - Section IV, B.2, B.3 and C, and Appendix A, "General Design Criteria for Nuclear Power Plants," Criterion 64. The program also complies with Title 10, Code of Federal Regulations, Part 20, "Standards for Protection Against Radiation," Section 1302. These federal requirements are cited in the Rancho Seco Quality Manual, Appendix A, and the REMP manual. REMP requirements are implemented through the review, approval and routine use of several documents, namely the REMP Manual, Offsite Dose Calculation Manual, Surveillance Procedures and Health Physics Implementing Procedures.

The programmatic elements of the REMP are based on regulatory requirements and associated guidelines. The objectives of the Program are to:

1.

Provide the technological basis and the instruction for monitoring the environs for radioactivity sources. The radioactive sources, which contribute to detectable radioactivity in the local environs, are comprised of:

Naturally occurring background, Releases during normal operations, World-wide weapons testing, and Major global nuclear accidents

Rancho Seco Nuclear Station E-2 2008 AREOR PROGRAM BASIS (Continued)

2.

Provide the means to verify the effectiveness of the Rancho Seco Nuclear Station Radiological Effluents Control Program.

3.

Meet the minimum detectable limits for radioisotopes in environmental samples.

4.

Provide quantitative measurements in the gaseous (airborne particulate), liquid, and direct radiation exposure pathways for radionuclides.

5.

Provide indications of the largest potential radiation exposure for individuals as a result of radionuclides in the principal exposure pathways.

The Program is developed and conducted using recognized standards and practices NRC79a, NRC79b, NUREG79, and NUREG80a.

REMP CHANGES The REMP manual and sampling program was not revised during 2008.

EXPOSURE PATHWAYS The fundamental parameters, which have been defined prior to monitoring the environs, are:

1.

Identification of the effluent release pathways

2.

Identification of the human exposure pathways

3.

Identification of the land use parameters by the population within a two-mile radius of the plant site.

Each of these three parameters is discussed below.

Effluent Release Pathways There are two principal pathways, which may result in human exposure to radiation and radioactive material originating from Station operation:

1. Liquid effluents and

2. Direct radiation from these effluents and onsite sources.

Rancho Seco Nuclear Station E-3 2008 AREOR Liquid Effluents In the liquid exposure pathway, humans can ingest radioactive materials in surface waters directly or indirectly through the consumption of aquatic foods such as fish and shellfish.

Humans can consume vegetation, which is irrigated with Clay Creek water, which may contain radioactive material. Another exposure pathway from liquid effluents results from the consumption of animal products such as meat and milk from animals, which have fed upon irrigated vegetation and/ or consumed Clay Creek water.

Direct Radiation In the direct radiation pathway, potential radiation exposure may occur from radioactive material storage areas, which are contained within the site boundary. People can potentially be exposed to direct radiation from ground deposition of particulates deposited on the ground from liquid effluents. With the off-loading of spent fuel to the ISFSI, the ISFSI has become part of the direct radiation pathway.

LAND USE CENSUS On a biennial basis, a land use census is conducted within a two-mile radius to identify any changes in the human exposure pathways. The Land Use Census is used to determine the changes needed for REMP monitoring activities. The results of the land use census conducted during 2007/ 2008 are presented in Appendix A of this Report. The land use census has been deleted from the current version of the REMP. From data obtained from the Land Use Census, exposure pathways are analyzed through a systematic process, which identifies a sample medium, or organism that is found to potentially contribute to an individual's radiation exposure. Usage and bioaccumulation factors (NRC77) are then specified which represent the magnitude of radioactive material transfer through the food chain to a receptor. The analysis of the effluent and exposure pathways enables monitoring sites to be identified as "indicator" (for sites at which the potential effects of Station effluents would be readily detected) or "control" (for those sites which are not expected to be influenced by Station operation). The analysis results of samples obtained at indicator and control sites are routinely compared to identify potential exposures above background levels.

Rancho Seco Nuclear Station E-4 2008 AREOR MONITORING LOCATION SELECTION The REMP maintains the monitoring sites required by the REMP manual, Table 6. This program is supplemented with additional samples to compensate for changes in the radiological environment surrounding Rancho Seco. The California Department of Health Services also selected some of the monitoring sites as part of their monitoring programs.

Indicator sites are placed in areas, which would be most sensitive to the effects of Station effluents such as downwind or downstream areas near the Station. If radioactive material is detected above background at any of these indicator sites, observed potential exposure and dose to humans can be estimated to verify the effectiveness of the Offsite Dose Calculation Manual in predicting potential exposures or doses. It is important to note that the detection of radioactive material in indicator samples does not necessarily mean that its presence can be attributed to Rancho Seco operations. Moreover, especially with liquid effluent pathway samples, the detection of radioactive material is difficult to interpret since it is unknown when the material was deposited. In many instances, the observed radioactive material could correctly be ascribed to historical (pre-2007) depositions.

Control locations provide data that should not be influenced by the operation of Rancho Seco.

These locations are selected based upon distance from the Station in the upwind or upstream direction of the effluent release pathways. Samples obtained from control locations should, upon analysis, reveal information about the presence and distribution of naturally occurring and man-made radioactive materials. Data from these locations are used to aid in the discrimination between the effects of Rancho Seco releases and other natural phenomena or accidental releases, which may result in human exposure.

Liquid radioactive effluents are discharged in batches from two onsite Retention Basins into "No Name" Creek located southwest of the Station. Dilution water, obtained from the Folsom South Canal, is discharged into "No Name" Creek to give reasonable assurance of compliance with the 10CFR50, Appendix I dose guidelines. "No Name" Creek flows southerly into the Clay Creek. Without this dilution water flow, the Clay Creek would be in a dry state for most of the year.

Beyond the Site Boundary at a point north of Highway 104, the Clay Creek empties into the Hadselville Creek. Hadselville Creek then empties into the Laguna Creek at a point west of North Clay Station Road near the Folsom South Canal. Finally, Laguna Creek flows into the Cosumnes River at a point located approximately 20 straight-line miles west of Rancho Seco.

Since this stream system is the only routine release pathway for liquid radioactive and non-radioactive effluents from the Station, the liquid exposure pathway indicator sites are located along these creeks and nearby land.

Rancho Seco Nuclear Station E-5 2008 AREOR MONITORING LOCATION SELECTION (continued)

The direct radiation pathway is monitored principally through a network of monitoring badges at sites distributed in sectors centered on the Station. The badges are located primarily at the site, residential, and recreational areas around the Rancho Seco location. This design provides the capability to easily detect Station-induced direct radiation contributions to the observed terrestrial and cosmic direct radiation background.

Some badges have been sited in special locations to record direct radiation resulting from known depositions of radioactive material, provide 10 CFR Part 72 license required data for the Interim Spent Fuel Storage Installation (ISFSI), and provide additional monitoring data for the IOSB.

Appendix B contains a detailed description and illustration of the REMP sample and monitoring locations.

SAMPLE MEDIA Samples are collected from predetermined monitoring sites at a specified frequency. The sample media chosen is a function of the type of monitoring desired and coincides with one of the following exposure pathways:

o Atmospheric o

Direct radiation o

Terrestrial o

Aquatic life o

Water Atmospheric monitoring is accomplished by filtering a volume of air using a mechanical air pump to collect particulates with a particulate filter paper. Three air sampler locations are used to collect weekly air samples. One location (Meteorological Tower) is a control location and the remaining two locations are indicator locations on the plant site.

Direct radiation monitoring is achieved by placing monitoring badges at aboveground sites.

The monitoring badges respond to, and record the amount of, gamma radiation exposure. The source of this gamma radiation exposure is varied and includes potential Station effluents, naturally occurring terrestrial, and cosmogonic radionuclides. The monitoring badges are also influenced by seasonal and global (fallout) radiation sources.

Rancho Seco Nuclear Station E-6 2008 AREOR SAMPLE MEDIA (Continued)

There are 39 sites, which are monitored within a 10-mile radius of the Station. The monitoring badges are placed at the Station Industrial Area Boundary, near the property boundary, locations of interest such as nearby residences, and at control locations located beyond five miles of the Station.

Terrestrial monitoring is accomplished by obtaining samples of sediment and garden vegetation to measure the quantity of radioactive material deposited from liquid effluents.

There are two mud and silt (sediment) and 2 garden vegetation locations.

Aquatic monitoring includes the sampling of fish. There are four fish sample locations that can be selected for sampling.

Water monitoring includes samples of surface, runoff, drinking, and well sources from locations in the liquid effluent pathway and from area wells. The six surface water sampling locations monitor site supply water (Folsom South Canal), runoff water and water discharged from the Station. Drinking water is sampled from two groundwater wells and three drinking water taps.

SAMPLE ANALYSIS & DATA HANDLING The laboratory, which provides radio-analytical services for the Program, is Eberline Services located in Richmond, California. Sample analysis results submitted by Eberline Services are reviewed for accuracy and completeness and then entered into a computerized database for evaluation.

Data comparisons are made between individual control and indicator sample sites to isolate potential Station influences on the measurement results.

The summarized results of the 2008 Radiological Environmental Monitoring Program are presented in Table 2.

Individual (raw data) results are presented in Appendix F, Tables F-1 through F-9.

REGULATORY REPORTING LEVELS Sample analysis data is reviewed and evaluated by the Radiological Health Supervisor as the results are received. All sample analysis results are reviewed for correct sensitivity and anomalies.

Rancho Seco Nuclear Station E-7 2008 AREOR REGULATORY REPORTING LEVELS (Continued)

The activity concentration values listed in Table E-1 are the environmental Fuel Cycle Dose quantities that, if exceeded, require a Special Report to be submitted to the USNRC. In accordance with the REMP Manual (Section 5, Fuel Cycle Dose), the Special Report must include an evaluation of any release conditions, environmental factors or other aspects, which caused the reporting limits to be exceeded.

In addition to the Fuel Cycle Dose reporting requirements, a Special Report is required to be submitted to the USNRC when more than one of the radionuclides in Table E-1 are detected in the sampling medium and the summed ratio of detected activity concentration to the respective Reporting Level concentration is greater than, or equal to, unity (1). When radionuclides other than those listed in Table E-1 are detected which are a result of Station effluents, a Special Report is required to be submitted if the potential annual dose commitment exceeds the 10 CFR 50, Appendix I guidelines.

No reports of the types described above were required to be submitted during 2008.

SENSITIVITY OF THE REMP MEASUREMENT PROCESS All Program measurements must be performed at a sensitivity, which meets USNRC requirements. This sensitivity is determined "before the fact" (a priori) for each radionuclide of interest and sample analysis type. Typical controllable sensitivity parameters include:

Sample volume or mass Sampling efficiency Time from sample collection to measurement Instrument detection efficiency for the nuclides (energies) of interest Background radiation levels Chemical recovery factors

Rancho Seco Nuclear Station E-8 2008 AREOR SENSITIVITY OF THE REMP MEASUREMENT PROCESS (continued)

By adjusting and controlling each of these parameters to maximize measurement process efficiency, a maximum sensitivity level (activity concentration) can be specified for each nuclide of interest and analysis type while maintaining an economic measurement process. The maximum sensitivities in the REMP are specified by the USNRC in the REMP Manual approved for Rancho Seco. These sensitivities are referred to as "LLD's", an acronym for "Lower Limit of Detection". LLD's are specified on an "a priori" basis and apply to routine measurement process capabilities when no other interfering radioactivity is present. The word "routine" is emphasized since occasional circumstances, such as limited sample mass, elevated levels of background radiation and interfering nuclides can contribute to sensitivity degradation.

Such occurrences are normally noted and reported during the conduct of REMP activities.

Meeting the LLD requirements is a quality control function shared by both REMP and the analytical laboratory personnel. Once the laboratory establishes values for the controllable parameters for each analysis type, sample chain of custody controls ensure that these parameters are upheld. If all parameters are upheld, then compliance with the LLD requirements has been demonstrated. The specific LLD values for Program measurements are included in Table E-2.

Since most of the samples analyzed result in the detection decision "activity not identified", a Minimum Detectable Activity (MDA) concentration value is calculated and reported. This value can be thought of as the LLD-at-the-time-of-counting since it is calculated using an equation, which is similar to the one, used to establish LLD parameters. The biggest difference is that actual (not "a priori") parameters are used, including interference from natural radioactive material in the sample. It is important to note that MDA's are reported only for those measurements where the "activity not identified" decision has already been made.

MDA values are used primarily to identify changes in the measurement process and to convey more information about the measurement itself. Without the use of the MDA concept, most Program measurements would be reported simply as "<LLD". With MDA used, Program measurements are reported as "< xxx " where "xxx" is the calculated MDA concentration.

Rancho Seco Nuclear Station E-9 2008 AREOR TABLE E-1 REPORTING LEVELS FOR RADIOACTIVITY CONCENTRATIONS IN ENVIRONMENTAL SAMPLES Analysis Water (pCi/L)

Airborne Particulate or Gases (pCi/m3)

Fish (pCi/kg, wet)

Food Products (pCi/kg, wet)

H-3 20000a Mn-54 1000 30000 Co-60 300 10000 Zn-65 300 20000 Cs-134 30 10 1000 1000 Cs-137 50 20 2000 2000 Gross Beta 40 b 2 c Notes: a For drinking water samples, this is a 40 CFR Part 141 value b Gross Beta activity in water of ten times the yearly mean of the control samples is indicated as the level that gamma isotopic analysis should be performed on the individual sample (NRC79a). Gamma isotopic analysis on each water sample is required by the REMP and therefore this requirement does not apply.

c Gross Beta activity in air of ten times the yearly mean of the control samples is indicated as the level that gamma isotopic analysis should be performed on the individual sample. The value indicated is Site specific.

Rancho Seco Nuclear Station E-10 2008 AREOR TABLE E-2 MAXIMUM (REQUIRED) LLD VALUES FOR ENVIRONMENTAL SAMPLESac (NRC79A)

Analysis (d)

Water (pCi/L)

Airborne Particulate or Gases (pCi/m3)

Fish (pCi/kg, wet)

Food Products (pCi/kg, dry)

Sediment (pCi/kg, dry)

Gross Beta 4b 0.01 H-3 2000 (1000, b)

Mn-54 15 130 Co-60 15 130 150e Zn-65 30 260 Cs-134 15 (10b) 0.01d 130 60 150 Cs-137 18 (10b) 0.01d 130 60 150 Notes:

(a)

Analysis requirements are those recommended in the BTP [NRC79A] and RETS [NUREG79].

(b)

LLD for water samples utilized for human consumption only [NUREG79].

(c)

Other peaks, which are measurable and identifiable, together with the nuclides in Table E-2, shall be identified and reported.

(d)

Composite analysis LLD is Shown; individual sample LLD is 0.05 pCi/m3 (Site-specific value).

(e)

LLD for Mud and Silt Co-60 is not required by RETS [NUREG79]. This value is consistent with the RETS required value for Cs-134 and Cs-137.

Rancho Seco Nuclear Station F-1 2008 AREOR APPENDIX F 2008 SAMPLE ANALYSIS RAW DATA TABLES

Rancho Seco Nuclear Station F-2 2008 AREOR TABLE F-1 2008 WEEKLY AIR SAMPLE

SUMMARY

Gross Beta Activity in Air Particulates (pCi/m3)

Collect Date RAS01CO 2 sigma RAS03MO 2 sigma RAS07EO 2 sigma 1/15/2008 0.016 0.001 0.017 0.001 0.020 0.001 1/22/2008 0.033 0.002 0.029 0.001 0.032 0.002 1/29/2008 0.008 0.001 0.007 0.001 0.008 0.001 2/5/2008 0.009 0.001 0.008 0.001 0.009 0.001 2/12/2008 0.023 0.001 0.022 0.001 0.024 0.001 2/19/2008 0.024 0.001 0.021 0.001 0.023 0.001 2/26/2008 0.009 0.001 0.008 0.001 0.008 0.001 3/4/2008 0.018 0.001 0.014 0.001 0.017 0.001 3/11/2008 0.025 0.001 0.023 0.001 0.026 0.001 3/18/2008 0.012 0.001 0.010 0.001 0.011 0.001 3/25/2008 0.019 0.001 0.017 0.001 0.019 0.001 4/1/2008 0.012 0.001 0.011 0.001 0.012 0.001 4/8/2008 0.017 0.001 0.015 0.001 0.017 0.001 4/15/2008 0.019 0.001 0.017 0.001 0.019 0.001 4/22/2008 0.017 0.001 0.015 0.001 0.017 0.001 4/29/2008 0.018 0.001 0.014 0.001 0.015 0.001 5/6/2008 0.014 0.001 0.015 0.001 0.015 0.001 5/13/2008 0.018 0.001 0.015 0.001 0.018 0.001 5/20/2008 0.016 0.001 0.013 0.001 0.014 0.001 5/27/2008 0.010 0.001 0.009 0.001 0.011 0.002 6/3/2008 0.014 0.001 0.012 0.001 0.013 0.001 6/10/2008 0.012 0.001 0.010 0.001 0.012 0.001 6/17/2008 0.017 0.001 0.015 0.001 0.015 0.001 6/24/2008 0.021 0.001 0.021 0.001 0.019 0.001

Rancho Seco Nuclear Station F-3 2008 AREOR TABLE F-1 2008 WEEKLY AIR SAMPLE

SUMMARY

(Continued)

Gross Beta Activity in Air Particulates (pCi/m3)

Collect Date RAS01CO 2 sigma RAS03MO 2 sigma RAS07EO 2 sigma 7/1/2008 0.012 0.002 0.011 0.001 0.010 0.001 7/8/2008 0.013 0.001 0.012 0.001 0.012 0.001 7/15/2008 0.019 0.001 0.017 0.001 0.017 0.001 7/21/2008 0.017 0.001 0.017 0.001 0.016 0.001 7/30/2008 0.014 0.001 0.015 0.001 0.013 0.001 8/5/2008 0.018 0.002 0.015 0.001 0.014 0.001 8/12/2008 0.017 0.001 0.016 0.002 0.016 0.001 8/19/2008 0.018 0.001 0.018 0.001 0.015 0.001 8/26/2008 0.011 0.001 0.011 0.001 0.010 0.001 9/2/2008 0.018 0.001 0.018 0.001 0.018 0.001 9/9/2008 0.025 0.001 0.028 0.002 0.026 0.001 9/15/2008 0.020 0.001 0.021 0.001 0.020 0.001 9/22/2008 0.020 0.001 0.021 0.001 0.020 0.001 9/30/2008 0.026 0.001 0.027 0.001 0.027 0.001 10/7/2008 0.015 0.001 0.015 0.001 0.014 0.001 10/14/2008 0.022 0.001 0.023 0.001 0.021 0.001 10/21/2008 0.042 0.002 0.043 0.002 0.042 0.002 10/28/2008 0.051 0.002 0.053 0.002 0.053 0.002 11/4/2008 0.038 0.002 0.040 0.002 0.038 0.002 11/11/2008 0.016 0.001 0.018 0.001 0.015 0.001 11/17/2008 0.038 0.002 0.042 0.002 0.037 0.002 11/25/2008 0.046 0.002 0.046 0.002 0.046 0.002 12/2/2008 0.058 0.003 0.055 0.002 0.051 0.002 12/9/2008 0.049 0.002 0.052 0.002 0.046 0.002 12/15/2008 0.053 0.002 0.048 0.002 0.052 0.002 12/23/2008 0.019 0.001 0.018 0.001 0.018 0.001 12/30/2008 0.014 0.001 0.015 0.001 0.015 0.001 1/6/2009 0.036 0.002 0.034 0.002 0.036 0.002 1/13/2009 0.380 0.004 0.038 0.002 0.039 0.001 1/20/2009 0.055 0.002 0.053 0.002 0.055 0.003

Rancho Seco Nuclear Station F-4 2008 AREOR Table F-2 2008 Luxel Summary (Direct Radiation)

Quarterly (mRem)

Location Number ID Description Type 2008-1 2008-2 2008-3 2008-4 1

RTL0.3RO Site fence north of spray ponds I

19 18 19 20 2

RTL0.3CO NE corner of parking lot I

17 18 18 22 3

RTL0.3NO Site fence west near south of rail spur I

22 19 23 27 4

RTL0.3LO Site fence south of canal pumps I

17 17 18 22 5

RTL0.3HO Site south of Admin Bldg.

I 17 17 18 23 6

RTL0.4FO NE corner of PV-1 I

16 16 16 22 7

RTL0.5CO RS entrance sign I

18 18 19 22 11 RTL0.6KO Tokay substation I

16 16 19 21 16 RTL2.7MO Tippling's residence I

15 14 16 19 17 RTL8.2KO Elliott Cemetery C

21 22 23 28 18 RTL7.8CO Sam Jaber residence C

15 14 15 19 19 RTL1.8FO RS Lake Maint. Bldg.

I Missing @

change out 11 15 19 20 RTL1.5MO Clay/ Kirkwood streets I

16 16 17 19 26 RTL3.9KO Borden Road I

15 16 17 18 30 RTL7.4MO Herald Fire Station C

19 19 18 23 31 RTL3.7NO Folsom South Canal back entrance I

18 18 18 21 33 RTL3.8MO Folsom South Canal/ Hwy 104 I

18 19 Missing @

change out 22 35 RTL1.9NO Hadselville/ Clay Creeks I

19 20 20 21 43 RTL1.7FO RS Lake Well Encl.

I 16 15 17 22 46 RTL1.4DO Hwy 104 mile marker 13.15 I

18 18 19 23 55 RTL8.0PO Dillard School C

16 18 18 20 63 RTL0.8DO Marcial Ranch I

14 16 16 18 65 RTL0.6MO Site Boundary Garden I

14 16 16 21 66 RTL0.4NO Soil depression area I

20 22 24 31 67 RTL0.4NO1 Dredge pile I

17 18 19 22 68 RTL0.3PO Site fence west by ISOB I

20 16 20 22 I = Indicator Location / C = Control Location

Rancho Seco Nuclear Station F-5 2008 AREOR Table F-2 (Continued) 2008 Luxel Summary (Direct Radiation)

Quarterly (mRem)

Location Number ID Description Type 2008-1 2008-2 2008-3 2008-4 88 RTL0.3NP ISFSI south fence I

18 19 21 23 89 RTL0.4NP ISFSI south fence I

18 20 20 21 90 RTL0.5NP ISFSI west fence I

22 23 21 30 91 RTL0.3QP Site fence NW corner I

18 18 17 21 92 RTL0.7QP Railroad spur I

16 16 17 19 93 RTL0.7JP Clay Rd east south of site I

16 15 17 21 94 RTL0.4PP ISFSI fence north I

21 20 23 28 95 RTL0.2PP IOSB Well/ new location 4th qtr I

26 96 RTL0.2NP Electrical Transformer/ new location 4th qtr I

24 97 RTL0.3NP Roof Access Ladder/ new location 4th qtr I

24 98 RTL0.2NP Switchyard Fence/ new location 4th qtr I

23 99 RTL0.3NP 100 meter Fence/ new location 4th qtr I

27 100 RTL0.3NP Access Road NW of IOSB/ new location 4th qtr I

22 I = Indicator Location / C = Control Location

Rancho Seco Nuclear Station F-6 2008 AREOR Table F-3 2008 Garden Vegetables Semi-annual (pCi/kg, wet)

Sample ID Collect Date Mn-54 Co-60 Zn-65 Cs-134 Cs-137 RLV0.6MO 3/31/2008 <4.79

<5.18

<11.9

<5.76

<5.50 RLV18.0KO 3/31/2008 <2.27

<2.79

<6.18

<3.20

<2.85 RLV0.6MO 9/22/2008 <5.21

<5.63

<12.7

<6.45

<5.43 RLV18.0KO 9/24/2008 <3.06

<3.59

<8.31

<3.47

<2.92 Table F-4 2008 SEDIMENT Quarterly (pCi/kg)

Sample ID Collect Date Mn-54 Co-60 Zn-65 Cs-134 Cs-137 sigma RMS0.6MOQ 1/16/2008 <11.2 8.45

<36.6 <9.07 51.4 5.9 RMS0.6MO 1/16/2008 <13.4

<8.11 <40.9 <18.0 58.8 9.1 RMS0.3MO 1/16/2008 <10.6

<6.76 <30.1 <8.22 23.5 5.6 RMS0.6MOQ 4/8/2008 <5.45

<5.92 <15.8 <9.49 252 8.6 RMS0.6MO 4/8/2008 <3.76

<4.32 <8.02 <5.33 235 7.2 RMS0.3MO 4/8/2008 <4.29

<7.47 <10.6 <5.76 19.1 4.3 RMS0.3MO 7/7/2008 <6.23

<7.05 <15.6 <11.1 79.1 7.7 RMS0.6MOQ 7/7/2008 <4.36

<10.9 <10.6 <5.29 73.4 6.1 RMS0.6MO 7/7/2008 <3.74

<7.60 <9.20 <5.39 50.7 5.2 RMS0.6MOQ 10/2/2008 <4.94

<9.38 <12.8 <6.60 181 7.9 RMS0.6MO 10/2/2008 <2.41

<6.33 <5.40 <3.63 206 5.2 RMS0.3MO 10/2/2008 <5.47

<5.15 <13.8 <8.73 28.3 6.5

Rancho Seco Nuclear Station F-7 2008 AREOR TABLE F-5 2008 FISH Semi-Annual (pCi/kg, wet)

Sample ID Collect Date Mn-54 Co-60 Zn-65 Cs-134 Cs-137 Cs-137 2S RFS0.6MO(1) 3/12/2008 <10.7

<12.2 <25.3 <12.7 24.6 11 RFS0.6MO(1) 9/4/2008 <3.23

<3.65 <8.14 <3.91

<8.14 RFS0.6MO(1) 11/18/2008 <7.68

<7.97 <15.9 <9.37

<21.8 Note: (1) =Predator Species TABLE F-6 2008 WELL WATER Quarterly (pCi/L)

Sample ID Collect Date Gross Beta Tritium Mn-54 Co-60 Zn-65 Cs-134 Cs-137 RWW0.3EO 2/5/2008 3.51

<156

<5.95 <6.34 <13.4

<7.73

<6.81 RWW0.8DO 2/5/2008

<1.93

<157

<7.64 <7.72 <18.1

<9.59

<7.32 RWW0.8DO 5/5/2008 2.82

<155

<8.74 <9.30 <21.6

<14.8

<9.13 RWW0.3EO 5/5/2008 3.51

<155

<3.48 <3.63 <7.54

<4.32

<4.06 RWW0.3EO 8/5/2008

<2.28

<134

<3.54 <3.34 <7.30

<4.88

<3.72 RWW0.8DO 8/5/2008

<2.33

<135

<7.53 <7.45 <15.9

<8.76

<7.68 RWW0.8DO 10/30/2008 3.09

<180

<9.64 <9.81 <25.3

<12.4

<9.92 RWW0.3EO 10/30/2008

<2.92

<180

<7.40 <7.91 <14.8

<8.92

<7.67

Rancho Seco Nuclear Station F-8 2008 AREOR TABLE F-7 2008 RUNOFF WATER Biweekly (pCi/L)

Sample ID Collect Date Tritium Mn-54 Co-60 Zn-65 Cs-134 Cs-137 RRW0.6MO 1/22/2008

<156

<6.99 <7.01 <14.1

<8.16

<6.39 RRW0.6MO 2/5/2008

<157

<8.91 <9.79 <25.0

<12.1

<9.13 RRW0.6MO 2/19/2008

<138

<8.50 <8.44 <22.7

<11.2

<8.71 RRW0.6MO 3/4/2008

<142

<6.39 <6.23 <14.6

<8.04

<6.64 RRW0.6MO 3/18/2008

<145

<6.70 <6.98 <14.2

<14.9

<7.39 RRW0.6MOQ 3/18/2008

<136

<8.49 <9.94 <22.0

<11.3

<8.63 RRW0.6MO 4/1/2008

<150

<9.18 <9.62 <21.9

<11.8

<9.50 RRW0.6MO 4/15/2008

<148

<4.49 <4.58 <9.57

<6.09

<4.53 RRW0.6MO 4/28/2008

<155

<8.73 <20.1 <9.80

<6.12

<4.31 RRW0.6MO 5/12/2008

<155

<3.84 <3.83 <7.26

<4.90

<4.23 RRW0.6MO 5/27/2008

<159

<4.14 <5.01 <9.56

<6.13

<4.83 RRW0.6MO 6/9/2008

<180

<5.45 <5.55 <13.1

<7.51

<6.38 RRW0.6MOQ 6/9/2008

<180

<7.52 <8.10 <18.4

<9.63

<7.72 RRW0.6MO 6/23/2008

<155

<4.53 <5.10 <10.0

<5.80

<4.25 RRW0.6MO 7/7/2008

<154

<9.42 <9.66 <24.2

<12.7

<9.28 RRW0.6MO 7/22/2008

<136

<4.15 <5.14 <9.10

<5.46

<4.59 RRW0.6MO 8/5/2008

<133

<4.26 <5.11 <8.89

<5.75

<4.33 RRW0.6MO 8/19/2008

<158

<5.06 <6.22 <9.20

<5.96

<5.03 RRW0.6MO 9/2/2008

<185

<10.1 <11.0 <21.4

<11.7

<10.8 RRW0.6MOQ 9/2/2008

<185

<9.33 <10.1 <24.9

<12.4

<9.82 RRW0.6MO 9/15/2008

<184

<6.80 <7.52 <15.9

<8.36

<7.85 RRW0.6MO 9/29/2008

<178

<4.85 <4.88 <9.46

<6.34

<4.82 RRW0.6MO 10/14/2008

<177

<8.02 <8.55 <19.2

<10.9

<7.94 RRW0.6MO 10/27/2008

<180

<6.84 <7.25 <14.2

<9.00

<7.60 RRW0.6MO 11/10/2008

<178

<7.98 <8.44 <19.6

<10.2

<7.71 RRW0.6MO 11/25/2008

<180

<4.26 <4.33 <8.58

<5.49

<4.18 RRW0.6MO 12/9/2008

<137

<7.78 <8.66 <19.3

<10.2

<7.95 RRW0.6MOQ 12/9/2008

<134

<4.66 <4.68 <9.07

<6.37

<4.36 RRW0.6MO 12/23/2008

<191

<8.59 <9.35 <22.0

<11.7

<8.88 RRW0.6MO 1/6/2009

<191

<6.17 <7.12 <16.1

<8.94

<6.44

Rancho Seco Nuclear Station F-9 2008 AREOR TABLE F-8 2008 SURFACE WATER Monthly Grab / Monthly Composite (pCi/L)

Sample ID Collect Date Tritiu m

Mn-54 Co-60 Zn-65 Cs-134 Cs-137 RSW0.3MO 1/23/2008

<157

<8.12 <8.88 <20.2

<10.2

<7.54 RSW0.7NO 1/23/2008

<155

<8.08 <8.52 <20.3

<10.1

<7.68 RSW1.3FO 1/23/2008

<155

<8.08 <8.52 <20.3

<10.1

<7.68 RSW1.8NO 1/23/2008

<156

<6.55 <6.70 <12.3

<8.13

<6.43 RSW1.8NOQ 1/23/2008

<155

<3.93 <3.90 <7.78

<5.05

<3.91 RSW3.7NO 1/23/2008

<164

<9.51 <4.61 <26.1

<7.19

<4.26 RSW0.3MO 2/25/2008

<143

<7.79 <8.70 <21.0

<10.4

<8.55 RSW1.8NO 2/25/2008

<144

<5.83 <6.98 <14.0

<7.60

<6.82 RSW1.3FO 2/25/2008

<142

<3.89 <5.31 <9.30

<5.07

<4.30 RSW3.7NO 2/26/2008

<144

<8.94 <9.68 <21.2

<15.3

<8.86 RSW0.7NO 2/26/2008

<145

<9.62 <10.1 <26.3

<13.0

<9.74 RSW1.3FO 3/24/2008

<149

<7.63 <8.05 <15.0

<8.71

<7.51 RSW0.7NO 3/25/2008

<148

<8.62 <8.75 <21.4

<12.8

<9.00 RSW1.8NO 3/25/2008

<147

<4.42 <5.22 <9.86

<5.95

<4.71 RSW0.3MO 3/25/2008

<153

<6.10 <6.74 <14.4

<8.41

<7.29 RSW3.7NO 3/25/2008

<148

<8.46 <9.47 <20.7

<11.7

<8.90 RSW0.7NO 4/21/2008

<186

<5.47 <5.48 <11.8

<7.22

<6.43 RSW1.3FO 4/21/2008

<187

<7.56 <8.46 <18.9

<10.4

<8.03 RSW1.8NO 4/22/2008

<187

<4.01 <4.33 <8.08

<5.15

<3.76 RSW0.3MO 4/22/2008

<187

<3.25 <3.76 <6.83

<4.76

<3.70 RSW3.7NO 4/22/2008

<188

<6.46 <6.97 <14.2

<7.73

<6.57 RSW1.8NOQ 4/22/2008

<187

<8.79 <9.65 <20.6

<20.9

<8.77 RSW0.7NO 5/27/2008

<158

<4.55 <4.82 <9.22

<5.82

<4.75 RSW0.3MO 5/27/2008

<160

<4.55 <5.19 <8.37

<5.85

<4.55 RSW3.7NO 5/27/2008

<158

<5.30 <6.37 <11.9

<10.5

<6.60 RSW1.3FO 5/27/2008

<155

<8.84 <9.28 <21.0

<11.3

<9.21 RSW1.8NO 5/27/2008

<159

<4.54 <4.70 <9.53

<6.11

<4.81 RSW3.7NO 6/24/2008

<154

<3.90 <3.54 <8.08

<4.85

<4.15 RSW1.8NO 6/24/2008

<155

<8.26 <8.65 <19.3

<10.9

<8.30 RSW0.3MO 6/25/2008

<155

<9.37 <10.1 <25.1

<15.3

<10.4 RSW1.3FO 6/25/2008

<154

<4.20 <4.85 <9.66

<5.43

<4.64 RSW0.7NO 6/25/2008

<154

<6.06 <6.44 <14.2

<8.18

<7.14

Rancho Seco Nuclear Station F-10 2008 AREOR TABLE F-8 (Continued) 2008 SURFACE WATER Monthly Grab/ Monthly Composite (pCi/L)

Sample ID Collect Date Tritium Mn-54 Co-60 Zn-65 Cs-134 Cs-137 RSW3.7NO 7/22/2008

<134

<7.35

<8.26

<15.2

<9.91

<7.78 RSW0.3MO 7/22/2008

<135

<4.46

<5.43

<10.9

<5.70

<4.88 RSW1.3FO 7/22/2008

<154

<6.91

<8.26

<15.8

<9.14

<7.69 RSW0.7NO 7/22/2008

<134

<3.85

<4.06

<7.44

<5.22

<3.99 RSW1.8NOQ 7/22/2008

<134

<5.76

<6.20

<12.6

<7.68

<7.49 RSW1.8NO 7/22/2008

<134

<7.94

<8.72

<20.9

<10.9

<8.30 RSW1.3FO 8/20/2008

<186

<5.99

<6.62

<13.9

<8.30

<7.04 RSW0.7NO 8/21/2008

<186

<8.65

<9.76

<23.0

<12.0

<8.70 RSW0.3MO 8/21/2008

<186

<4.85

<4.80

<10.1

<6.34

<4.79 RSW3.7NO 8/21/2008

<186

<6.73

<6.90

<15.0

<8.55

<7.44 RSW1.8NO 8/21/2008

<184

<9.17

<8.83

<22.6

<12.1

<9.38 RSW0.7NO 9/18/2008

<178

<4.56

<4.79

<9.05

<5.59

<4.87 RSW1.8NO 9/18/2008

<179

<4.71

<5.19

<11.0

<5.39

<5.17 RSW1.3FO 9/18/2008

<178

<6.16

<6.74

<15.2

<8.52

<7.23 RSW3.7NO 9/22/2008

<178

<3.93

<4.01

<7.87

<5.45

<4.49 RSW0.3MO 9/22/2008

<178

<4.34

<4.85

<10.3

<5.90

<4.84 RSW1.3FO 10/16/2008

<181

<8.10

<9.07

<20.3

<10.9

<8.68 RSW1.8NOQ 10/16/2008

<181

<5.74

<6.42

<12.3

<7.56

<6.76 RSW1.8NO 10/16/2008

<180

<6.72

<7.73

<17.2

<9.58

<7.15 RSW0.3MO 10/21/2008

<180

<8.70

<8.90

<19.8

<10.7

<7.93 RSW3.7NO 10/22/2008

<181

<7.19

<7.51

<14.3

<9.14

<6.84 RSW0.7NO 10/22/2008

<180

<7.13

<8.16

<18.4

<9.60

<7.82 RSW1.3FO 11/17/2008

<180

<5.78

<6.86

<13.6

<9.07

<7.26 RSW1.8NO 11/17/2008

<181

<7.45

<8.72

<18.1

<14.0

<8.34 RSW0.3MO 11/17/2008

<180

<4.32

<5.13

<8.83

<5.82

<4.83 RSW0.7NO 11/17/2008

<180

<10.0

<10.5

<24.8

<12.7

<10.4 RSW3.7NO 11/17/2008

<180

<7.76

<7.71

<17.2

<8.91

<7.53 RSW3.7NO 12/15/2008

<134

<7.88

<8.08

<18.9

<10.1

<15.3 RSW1.3FO 12/15/2008

<135

<3.81

<3.91

<7.97

<5.20

<5.47 RSW1.8NO 12/15/2008

<137

<7.19

<8.20

<15.2

<8.03

<7.68 RSW0.3MO 12/15/2008

<136

<4.84

<5.51

<10.1

<6.31

<4.72 RSW0.7NO 12/15/2008

<137

<10.1

<10.5

<24.1

<11.0

<10.3 RSW0.3MO 1/20/2009

<153

<4.33

<5.17

<10.6

<6.00

<4.77 RSW3.7NO 1/20/2009

<154

<7.99

<9.07

<18.7

<22.2

<8.41

Rancho Seco Nuclear Station F-11 2008 AREOR TABLE F-9 2008 Drinking Water Monthly (pCi/L)

Sample ID Collect Date Gross Beta Tritium Mn-54 Co-60 Zn-65 Cs-134 Cs-137 RDW1.8FP 1/23/2008 4.80

<158

<9.10 <9.42 <23.5

<13.0

<9.49 RDW0.1GO 1/23/2008 4.19

<157

<5.65 <6.05 <14.3

<14.0

<6.92 RDW0.2PP 1/23/2008 4.16

<154

<4.74 <4.76 <9.74

<5.38

<4.62 RDW0.1GO 2/25/2008 3.75

<142

<3.56 <3.49 <6.29

<8.93

<3.76 RDW0.2PP 2/25/2008 2.34

<143

<5.34 <6.30 <13.7

<8.11

<6.71 RDW1.8FP 2/25/2008 4.78

<144

<7.77 <7.90 <20.6

<10.1

<7.72 RDW0.2PP 3/24/2008 2.41

<150

<4.16 <5.13 <9.42

<5.58

<4.58 RDW0.1GO 3/24/2008 3.74

<149

<3.61 <3.50 <7.45

<4.71

<4.06 RDW1.8FP 3/25/2008 3.81

<146

<6.50 <7.54 <14.2

<7.95

<7.15 RDW1.8FP 4/21/2008 3.03

<187

<5.18 <5.08 <10.9

<7.14

<5.77 RDW0.2PP 4/21/2008 3.36

<187

<7.43 <8.20 <20.0

<10.1

<7.74 RDW0.1GO 4/21/2008 5.85

<187

<3.92 <5.03 <8.51

<5.10

<4.46 RDW1.8FP 5/27/2008 3.40

<159

<5.78 <6.50 <13.4

<7.79

<7.22 RDW0.2PP 5/27/2008 3.73

<159

<4.48 <4.42 <9.29

<5.78

<4.22 RDW0.1GO 5/27/2008 3.72

<159

<3.67 <4.18 <7.43

<5.21

<4.11 RDW1.8FP 6/25/2008 3.52

<156

<4.56 <4.83 <9.38

<5.98

<4.67 RDW0.1GO 6/25/2008 2.44

<154

<8.70 <8.68 <19.1

<11.2

<8.43 RDW0.2PP 6/25/2008 2.44

<154

<3.86 <3.78 <8.08

<4.90

<4.34 RDW0.1GO 7/22/2008 5.60

<134

<4.34 <4.89 <9.32

<5.67

<6.59 RDW1.8FP 7/22/2008 6.09

<135

<3.99 <3.75 <7.84

<5.12

<8.39 RDW0.2PP 7/22/2008 3.40

<138

<8.15 <9.29 <20.6

<30.9

<13.6 RDW1.8FP 8/20/2008

<2.85

<186

<4.08 <3.85 <14.6

<5.40

<4.36 RDW0.2PP 8/20/2008 3.07

<186

<7.23 <7.84 <16.9

<8.79

<8.06 RDW0.1GO 8/20/2008 2.17

<186

<10.2 <9.30 <25.2

<13.2

<10.1 RDW0.2PP 9/18/2008 3.55

<178

<6.46 <7.06 <15.4

<12.1

<7.42 RDW0.1GO 9/18/2008

<2.89

<178

<7.55 <7.79 <17.0

<9.00

<7.78 RDW1.8FP 9/18/2008 3.22

<178

<9.25 <9.33 <23.8

<11.7

<8.93 RDW1.8FP 10/16/2008 4.25

<181

<9.08 <9.66 <24.1

<12.1

<9.65 RDW0.2PP 10/16/2008 4.15

<180

<6.36 <7.15 <14.8

<9.31

<7.54 RDW0.1GO 10/16/2008 3.76

<181

<4.74 <5.58 <9.50

<5.84

<5.03 RDW1.8FP 11/17/2008 3.57

<180

<3.66 <3.76 <8.26

<5.16

<4.41 RDW0.2PP 11/17/2008 2.67

<181

<7.76 <8.20 <17.5

<10.3

<8.23 RDW0.1GO 11/17/2008 2.80

<181

<7.68 <7.70 <16.4

<8.41

<7.63 RDW0.2PP 12/15/2008

<3.03

<136

<4.66 <5.26 <9.81

<6.56

<5.64 RDW0.1GO 12/15/2008 4.80

<136

<4.18 <3.76 <7.61

<5.10

<4.44 RDW1.8FP 12/15/2008 4.25

<136

<4.65 <4.68 <9.72

<6.21

<8.96

Rancho Seco Nuclear Station G-1 2008 AREOR APPENDIX G 2008 MISSED SAMPLE REPORT In accordance with the requirements REMP manual section 3.1, the following samples are being reported as not being collected for the reasons indicated. Corrective action as required by the REMP manual is as indicated.

Air Sampler (Airborne Pathway)

RAS0.3MO, Plant Effluent (indicator) / RAS0.1CO, Security Bldg. (indicator)/ RAS0.7EO, Meteorological Station (indicator) - On January 5, 2008, it was found that the air sampler (RAS0.3MO) had been tipped over in a high wind and rain storm. Power was also lost during the storm to the other air sampler locations (RAS0.1CO and RAS0.7EO). The air sampler was up righted and the sample was changed out. Routine change occurred on January 8, 2008.

Two samples will be collected and reported for the air sampler at location RAS0.3MO. The minimum sample volume was achieved for all three air samples.

RAS0.3MO, Plant Effluent (indicator) / RAS0.1CO, Security Bldg. (indicator)/ RAS0.7EO, Meteorological Station (indicator) - On February 1, 2008 a power outage occurred on Site which prevented all three air samplers from running for a total of 98 minutes for the air sampling period of January 29, 2008 to February 5, 2008. All samples were collected and minimum sample volume was achieved.

RAS0.3MO, Plant Effluent (indicator) / RAS0.1CO, Security Bldg. (indicator)/ RAS0.7EO, Meteorological Station (indicator) - On February 13, 2008 it was determined that the REMP shipment on January 9, 2008 was misplaced by the shipper (UPS) and never arrived at Eberline for analysis. Air sampler results for all three locations will not be reported for this sampling period RAS0.1CO, Security Bldg. (indicator) - Loss of power for this location for a period of 45 minutes on June 12, 2008 for the sampling period of June 10, 2008 to June 17, 2008.

Minimum sample volume was obtained.

Rancho Seco Nuclear Station G-2 2008 AREOR APPENDIX G 2005 MISSED SAMPLE REPORT (Continued)

Direct Monitoring Pathway (Luxel Badge))

RTL1.8FO Rancho Seco Lake Maintenance Building (Indicator) - During badge change out for the 2nd quarter 2008, the monitoring badges at this location were not found. A search of the area was conducted and no evidence of the badges was found. 2nd quarter badges were placed at the location. No data will be available for this location for the 1st quarter 2008 results.

RAS3.8MO, Folsom South Canal/ HWY 104 (indicator) - During badge change out for the 4th quarter 2008, the monitoring badges at this location were not found. A search of the area was conducted and no evidence of the badges was found. 4th quarter badges were placed at the location. No data will be available for this location for the 3rd quarter 2008 results.