Text

Annual Radiological Environmental Operating Report for 2001
	ML021230500
Person / Time
Site:	Rancho Seco
Issue date:	04/23/2002
From:	Redeker S; Sacramento Municipal Utility District (SMUD)
To:	Merschoff E; NRC Region 4
References
	-RFPFR, MPC&D 02-037
	Download: ML021230500 (82)
	v • d • e

SMUD SACRAMENTO MUNICIPAL UTILITY DISTRICT Z P. 0. Box 15830, Sacramento CA 95852-1830, (916) 452-3211 AN ELECTRIC SYSTEM SERVING THE HEART OF CALIFORNIA MIPC&D 02-037 April 23, 2002 U. S. Nuclear Regulatory Commission Attn.: E. W. Merschoff Harris Tower 611 Ryan Plaza Drive, Suite 400 Arlington, TX 76011-8064 Docket No. 50-312 Rancho Seco Nuclear Generating Station License No. DPR-54 RANCHO SECO ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT FOR 2001

Dear Mr. Merschoff:

Attached is the Rancho Seco Annual Radiological Environmental Operating Report (AREOR) for 2001. This report contains the information required by the Rancho Seco Permanently Defueled Technical Specification D6.9.2.3 "Annual Radiological Environmental Operating Report."

Members of your staff with questions requiring additional information or clarification may call Steve Nichols at (916) 732-4850.

Sincerely, Steve Redeker Manager, Plant Closure & Decommissioning Cc:

Document Control Desk, NRC, Washington DC J. Hickman, NRC, Rockville DISTRICT HEADQUARTERS El 6201 S Street, Sacramento CA 95817-1899

ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT JANUARY -- DECEMBER 2001 Rancho Seco Nuclear Station Herald, California License Number DPR-54

2001 ANNUAL RADIOLOGICAL EN4VIRONMENTAL OPERATING REPORT TABLE OF CONTENTS TABLE OF CONTENTS...................................................................................................................................

i LIST OF FIG URES.........................................................................................................................................

ii LIST OF TABLES..........................................................................................................................................

iii I. EXECUTIVE

SUMMARY

1 I1. LAND USE CENSUS..................................................................................................................................

2 111.

RADIO LOGICAL IM PACT EVALUATION.............................................................................................

2 PREDICTED POTENTIAL RADIOLOGICAL IMPACT.....

I.......................... 2 FUEL CYCLE DOSE EVALUATION.............................................................................................

3 OBSERVED POTENTIAL RADIOLOGICAL IMPACT.................................................................

3 IV. PROGRAM ANALYSIS RESULTS SUM MARY..................................................................................

6 IV-A. ATMOSPHERIC MONITORING......................................................................................

6 IV-B. DIRECT RADIATION M ONITO RING...............................................................................

7 IV-C. TERRESTRIAL MONITO RING........................................................................................

7 IV-D. AQUATIC LIFE M ONITO RING..............................................................................................

8 IV-E. W ATER MONITO RING....................................................................................................

9 V. REFERENCES....................................................................................................................................

19 VI.

APPENDICES.....................................................................................................................................

20 2000 LAND USE CENSUS RESULTS....................................................................................

A-1 SAM PLE SITE DESCRIPTIONS AND MAPS..........................................................................

B-1 QUALITY CONTROL SAM PLE ANALYSIS RESULTS.............................................................

C-1 SAM PLE COLLECTION AND ANALYSIS METHODS.............................................................

D-1 ENVIRONMENTAL MONITORING PROGRAM DESIGN........................................................

E-1 2001 SAMPLE ANALYSIS RAW DATA TABLES......................................................................

F-1 2001 M ISSED SAMPLE REPORT...........................................................................................

G-1 Rancho Seco Nuclear Station 2001 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 ii 2001 AREOR

LIST OF TABLES TABLE TITLE PAGE 1

2001 LIQUID EFFLUENT PATHWAY POTENTIAL DOSE COMPARISON --------------------------- 5 2

ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM ANNUAL

SUMMARY

11 B-1 RADIOLOGICAL ENVIRONMENTAL MONITORING SITES AND MAP LOCATIONS ----------

B-7 C-1 2001 INTERLABORATORY COMPARISON PROGRAM -----------------------------------------------

C-4 E-1 REPORTING LEVELS FOR RADIOACTIVITY CONCENTRATIONS IN ENVIRONMENTAL SAMPLES ------------------------------------------------------------------------------

E-10 E-2 MAXIMUM (REQUIRED) LLD VALUES FOR ENVIRONMENTAL SAMPLES -----

7 -------------

E-1 1 F-1 2001 WEEKLY AIR SAMPLE

SUMMARY

F-2 F-2 2001 LUXEL

SUMMARY

(DIRECT RADIATION) ----------------------------------------------------------

F-4 F-3 2001 GARDEN VEGETABLES --------------------------------------------------------------------------------

F-5 F-4 2001 SOIL AND SEDIMENT....... ----------------------------------------------------------------------------

F-6 F-5 2001 FISH..................................................--------------------------------------------------------

F-10 F-6 2001 ALGAE.................................................------------------------------------------------------

F-10 F-7 2001 WELL WATER --------------------------------------------------------------------------------------------

F-11 F-8 2001 RUNOFF WATER ----------------------------------------------------------------------------------------

F-12 F-9 2001 SURFACE WATER ---------------------------------------------------------------------------------------

F-14 F-10 2001 DRINKING WATER --------------------------------------------------------------------------------------

F-17 F-11 2001 RAINWATER ----------------------------------------------------------------------------------------------

F-18 Rancho Seco Nuclear Station iii 2001 AREOR

2001 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT

1.

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, 2001 through December 31, 2001. This program is conducted by the Radiation Protection/ Chemistry Group at RSNS and is conducted in accordance with section D6.8.3.b of the RSNS Permanently Defueled Technical Specifications.

The results of the 2001 Radiological Environmental Monitoring Program showed that the operation of RSNS had no significant radiological impact on the environment.

Currently, the Plant is (1) permanently shutdown, (2) in a SAFSTOR condition, and (3) undergoing Decommissioning. Fuel off-loading into dry storage is currently in progress and scheduled to be complete by the fourth quarter of 2002.

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 evaluations. All positively detected results were well below the reporting levels.

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 creek are being used to evaluate the higher than average soil activity.

This activity is a result of historic monitored liquid effluent releases during Station operation. One monitoring badge location in this area is indicating dose higher than the indicator average. The dose at this location does not exceed regulatory limits.

Isotopic identifications were consistent with known releases of radioactive material from the Station to the atmospheric and aquatic environments. As expected, algae, fish, soil, and sediment samples obtained from the environment of the No Name, Clay, Hadselville, and Laguna Creeks contributed the majority of positive isotopic identifications. Cesium-1 37 and Cobalt-60 are the predominant nuclides identified in the aquatic and soil environment. Mn-54 was detected in one of the storm drain soil samples. Tritium activity in Surface Water and Runoff Water samples was detected during periods of liquid effluent releases.

Rancho Seco Nuclear Station 2001 AREOR 1

11.

LAND USE CENSUS The 2000 Land Use Census was conducted in accordance with the Rancho Seco Permanently Defueled Technical Specification (PDTS) section D.6.8.3.b.2 and Radiological Environmental Monitoring Program (REMP) manual section 4.0. This evaluation is in accordance with the requirements of 1 OCFR50, Appendix 1, section IV.B.3. The land use census is performed on a biennial schedule and was performed during 2000 and completed in 2001. The next land use census is scheduled to be conducted in 2002 and completed in 2003.

Ill.

RADIOLOGICAL IMPACT EVALUATION PREDICTED POTENTIAL RADIOLOGICAL IMPACT Gaseous Effluent Exposure Pathways The maximum calculated annual organ dose commitment due to gaseous releases of tritium and particulate isotopes was 0.03 mRem (as calculated using the Rancho Seco Offsite Dose Calculation Manual (ODCM)). This calculated organ dose commitment was 0.2% of the associated PDTS limit (10CFR50, Appendix I guideline).

Noble gases were not released in 2001 and therefore no dose calculations for noble gases were necessary.

Liquid Effluent Exposure Pathways During 2001, 2.53 E+07 liters of waste water were released into "No Name" Creek from the two onsite Retention Basins. This volume of wastewater was dispersed into 1.58 E+1 0 liters of dilution water. The estimated error associated with determining these volumes were 5% and 20%, respectively.

The Liquid source term resulted in a calculated annual child total body dose commitment of 0.065 mRem and a calculated child liver dose commitment of 0.093 mRem (as calculated using the ODCM). These calculated dose commitments were 2.17% and 0.93%, respectively, of the associated PDTS limits (1 OCFR50, Appendix I guidelines). The dose commitments reflect the age groups that could have received the highest annual dose commitment from the liquid source term. This information is summarized in Table 1.

Rancho Seco Nuclear Station 2001 AREOR 2

Ill.

RADIOLOGICAL IMPACT EVALUATION (Continued)

FUEL CYCLE DOSE EVALUATION PDTS section D6.9.2.3 [NRC74] 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 2001 since no R MP measurement exceeded the established reporting levels.

Additionally, the Station effluent dose predictions did not exceed twice the dose guidelines of 1 OCFR50, 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.

OBSERVED POTENTIAL RADIOLOGICAL IMPACT Gaseous Effluent Exposure Pathways The calculated gaseous effluent dose commitment calculation activity, of 0.03 mRem [RS01] is based on tritium activity. No particulate isotopes of Station origin were released during 2001. The observed dose commitment 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 tritium activity dose calculations. Therefore, no dose comparison was completed.

This was also confirmed during 2001, as none of the REMP quarterly composite gamma isotopic analysis results for the airborne pathway indicated the presence of nuclides of Station origin.

Direct Radiation Exposure Pathway Based on Luxel control and indicator locations measurement results obtained during 2001, 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 were 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.

Rancho Seco Nuclear Station 2001 AREOR 3

!11.

RADIOLOGICAL IMPACT EVALUATION (Continued)

OBSERVED POTENTIAL RADIOLOGICAL IMPACT Liauid Effluent Exposure Pathways To evaluate the impact on the environment from the liquid effluent pathway, dose calculations were performed and compared with the annual dose commitment calculations reported in the January -December 2001 Rancho Seco Annual Radioactive Effluent Release Report [RS01]. The observed results presented in Table 1 were obtained using the Cs-1 37 activity reported for the fish samples from 2001 (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 2001 Station operations only and was not affected by radioactivity introduced into the environment prior to 2001. A major portion of the activity identified by Program measurements in 2001 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.

The 2000 Land Use Census indicates the potential for a liquid/ fish or liquid/ irrigated vegetation pathway. This potential will be updated in the 2002 Land Use Census. This potential is based on the possibility and not actual data supporting the use of the effluent streams for a source of fish.

Conservative consumption factors for fish were used for the observed dose commitment based on this potential.

Rancho Seco Nuclear Station 2001 AREOR 4

Ill.

RADIOLOGICAL IMPACT EVALUATION (Continued)

OBSERVED POTENTIAL RADIOLOGICAL IMPACT TABLE 1 2001 Liquid Effluent Pathway Potential Dose Comparison POTENTIAL DOSE COMMITMENT (Based on the maximally exposed group)

(a)

Reported in the 2001 Annual Radiological Effluents Report (b)

Calculated using Cs-1 37 activity for fish samples (Appendix F, Table F 5).

(c)

The observed dose commitments for doses reflect the age group that could have received the highest annual dose commitment from the liquid source term Rancho Seco Nuclear Station PREDICTED DOSE OBSERVED DOSE PERCENT OF THE COMMITMENT (a)

COMMITMENT (b) (c) 10CFR5O APPENDIX I DOSE LIMITS (mRem)

(mRem) 1.97%

0.065 0.059 Total Body (Child Total Body)

(Adult Total Body)

(3 mrem guideline) 0.93 %

0.093 0.093 Organ (Child-Liver)

(Teen Liver)

(10 mrem guideline)

Notes:

2001 AREOR 5

IV.

PROGRAM ANALYSIS RESULTS

SUMMARY

This section compiles all 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:

SAtmospheric (Section IV-A)

= Direct Radiation (Section IV-B)

Terrestrial (Section IV-C)

=> Aquatic Life (Section IV-D)

(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. No table is presented for this data since all the data was reported as being below the associated minimum detectable activity for the nuclides of interest.

The data indicates that there was no measurable contribution to the airborne radioactivity inventory, which 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-i.

Rancho Seco Nuclear Station 6

2001 AREOR

IV-B. DIRECT RADIATION MONITORING DATA EVALUATION A comparison review of all Luxel data for the indicator and control locations during 2001 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.

The summary data for 2001 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 -- Eleven garden vegetation samples and two grape samples were collected and analyzed for nuclides of interest during 2001. No gamma emitting isotopes were found in any of the samples analyzed. A site boundary irrigated garden has been evaluated to be a conservative method for evaluating the liquid effluent pathway. This method meets the requirement of the Land Use Census for monitoring gardens. This site boundary garden is used for the Land Use Census. The vineyard grape samples included a control location and an indicator location. These two samples were analyzed for gamma emitting isotopes and tritium activity. Tritium activity in the grape samples was less than detectable.

Soil (discharge canal) -- Eight soil samples were collected and analyzed for nuclides of interest from the effluent discharge canal and downstream creeks during 2001. Cs-137 (7 samples, 92 to 738 pCi/kg, 357 pCi/kg mean) and Co-60 (1 sample, 17 pCi/kg) was detected by the analyses. The remaining nuclide identifications were numerically below the required LLD equivalent activity concentration. The presence of the identified nuclides is attributed to historical Station operations. Sampling at these locations is within an approximately 10 m area. Random sampling in this area provides data to evaluate isotopic concentrations in the sample location. Due to the random nature of the samples, the data does not provide adequate statistical information to evaluate individual isotopic decay or overall migration information. Soil sampling at these locations is not required by the REMP (administratively controlled).

Soil (storm drain outfall) -- Thirty soil samples were collected from fifteen storm drain out-fall locations during 2001. These out-falls are located along the perimeter of the Industrial Area Boundary (Restricted Area) and the ISFSI. Gamma spectrometry analysis of these samples revealed the presence of Cs-1 37 (21 samples, 18 to 182 pCi/kg, 53 pCi/kg mean), Co-60 (2 samples, 65 to 134 pCi/kg, 100 pCi/kg mean), and Mn-54 (1 sample, 11 pCi/kg). Sampling at these locations is in the area of the storm drain discharge. Soil sampling at these locations is not required by the REMP (administratively controlled).

Rancho Seco Nuclear Station 2001 AREOR 7

IV-C. TERRESTRIAL MONITORING (Continued)

DATA EVALUATION Soil (depression area) -- Fourteen (14) soil samples at seven locations were collected in 2001.

Gamma spectrometry analysis of these samples indicated the presence of Cs-1 37 (14 samples, 34 to 32190 pCi/kg, 8637 pCi/kg mean) and Co-60 (7 samples, 70 to 959 pCi/kg, 449 pCi/kg mean). Sampling at these locations is within an approximately 3 m2 area. As stated for the soil locations along the effluent discharge, random sampling in this area provides data to evaluate isotopic concentrations in the individual sample location(s). Due to the random nature of the samples, the data does not provide adequate statistical information to evaluate individual isotopic decay or overall migration information. Soil sampling at these locations is not required by the REMP (administratively controlled).

The summary data for 2001 terrestrial monitoring is presented in Table 2. Comprehensive data tables are given in the following Appendix F tables:

SF-3 (Garden Vegetables)

=> F-4 (Soil and Sediment).

IV-D. AQUATIC LIFE MONITORING DATA EVALUATION Fish - Two fish samples were collected during 2001 and analyzed for nuclides of interest by gamma spectrometry. Gamma spectrometry analysis of these samples indicated the presence of Cs-i137 (2 samples, 21 to 57 pCi/kg, 50 pCi/kg mean).

Sediment - 24 samples of sediment were collected from the discharge canal and the Clay!

Hadselville/ Laguna Creeks during 2001. Gamma spectrometry analysis of these samples indicated the presence of Cs-1 37 (22 samples, 17.6 to 366 pCi/kg, 122.9 pCiikg mean) and Co 60 (5 samples, 9.8 to 25.9 pCi/kg, 17.5 pCi/kg mean).

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

Rancho Seco Nuclear Station 2001 AREOR 8

IV-E. WATER MONITORING DATA EVALUATION Algae - Five samples of algae were collected from the discharge canal and the Clay/

Hadselville/ Laguna creeks during 2001. Cs-1 37 (3 samples, 17.7 to 57 pCi/kg, 37.7 pCi/kg mean) was detected by gamma spectrometry analysis.

The identification of nuclides of interest in the algae samples is attributed to permitted historical liquid effluent discharges.

Well Water - 39 well water samples were collected at indicator and control locations around the site during 2001. 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 - 31 runoff water samples were collected at the site boundary durfing 2001. No nuclides of interest were identified by gamma spectrometry. Tritium analysis, when liquid effluent releases were in progress, indicated positive tritium results as expected. Tritium results in three samples indicated 793 pCi/L, 3600 pCi/L, and 62600 pCi/L.

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 provide monthly composite samples. During 2001, 64 samples were collected and analyzed for nuclides of interest. No gamma-emitting nuclides were detected in any of the samples analyzed. Tritium activity was detected in the samples collected during planned liquid effluent releases. The tritium activity was measured at 199 pCi/L-412 pCi/ L.

Tritium activity was detected in the composite and grab samples. One tritium result from the composite sampler at Folsom South Canal (RSW3.7NO, control location) indicated 412 pCi/L.

The State DHS sample result for the same location was <282 pCi/L. Reanalysis of the original sample confirmed the presence of tritium. The sample taken at RSWO.7NO (water sump, indicator location) collected on the same day indicated <200pCi/L. There had been an effluent release prior to the sample collection date and the sample should have indicated a positive result. Based on the investigation conducted, it can be concluded that the samples for RSW3.7NO and RSWO.7N0 were labeled incorrectly.

Drinking Water - Water supplied from the site well is distributed in a potable water supply system for Station personnel consumption and use. On a monthly frequency, a sample of this water was 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 24 samples collected in 2001. Gross Beta analysis showed activity within regulatory limits.

Rainwater - On a seasonal basis, rainwater is collected at an off site location. The sample is analyzed for gamma emitting isotopes and tritium. During 2001, 14 samples were collected at this location. No isotopes of interest were detected in these samples. Rainwater samples are not required to be collected by the REMP (administratively controlled).

Rancho Seco Nuclear Station 9

2001 AREOR

IV-E. WATER MONITORING DATA EVALUATION (continued)

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 Soil and Sediment

= F-6 Algae

=ý F-7 Well Water

= F-8 Runoff Water

F-9 Surface Water

= F-10 Drinking Water

-* F-11 Rain Water Rancho Seco Nuclear Station 2001 AREOR 10

TABLE 2 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM ANNUAL

SUMMARY

Rancho Seco Nuclear Station 11 2001 AREOR

TABLE 2 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM ANNUAL

SUMMARY

Name of Facility Rancho Seco Nuclear Station Docket No. DPR-54 Location of Facility Sacramento, California (County, State)

Reporting Period January - December 2001 Medium or Type and Lower All Indicator Location with Highest Annual Control locations Number of Pathway Total Limit of Locations Mean Mean (f) a Nonroutine Sampled Number of Detection Mean (f)b Name Mean (f) b Range Reported (Unit of Analysis (LLD)b Range Distance Range Measurements Measurement)

Performed

& Direction Air Particulates (pCi/M3)

Gross f3 0.01 0.022 (102/102)

RAS0.3MO 0.022 (50/50) 0.022 (102/102) 0 (203)

(0.010- 0.085) 0.3 miles 2470 (0.010-0.085)

(0.010-0.072) y-spec (12)

CS 0.01

<LLD

-,Cs 0.01

<LLD

<LLD Direct Radiation RTLO.4NO 32.8 (4/4)

(mRem/qtr.)

Luxel NA 16.5 (115-115) 0.4 miles 2700 (29-37) 14.7 (22/22) 0 (137)

(11-37)

(11-22)

Garden Vegetables y-spec (pCi/kg)

(6) b°Co 60

<LLD

<LLD 0

137Cs 60

<LLD

<LLD 0

__ 4Cs 60

<LLD

<LLD 0

Tritium (2) 1000

<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 12 2001 AREOR

TABLE 2 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM ANNUAL

SUMMARY

Name of Facility Rancho Seco Nuclear Station Docket No. DPR-54 Location of Facility Sacramento, California (County, State)

Reporting Period January - December 2001 Medium or Type and Lower All Indicator Location with Highest Annual Control locations Number of Pathway Total Limit of Locations Mean Mean (f) a Nonroutine Sampled Number of Detection Mean (f)b Name Mean (f) b Range Reported (Unit of Analysis (LLD)b Range Distance Range Measurements Measurement)

Performed

& Direction Soil Discharge Canal y-spec (pCi/kg)

(8) bCo 150 17 (1/8)

RSLO.6M0 17 (1/2)

(17-17) 0.6 miles 2480 (17-17)

NA 0

1 3'Cs 150 357 (7/8)

RSL1.5NO 580 (2/2)

(92-738) 1.5 miles 2700 (422-738)

NA 0

____ cS

_150

<LLD

<LLD NA 0

Soil y-spec Storm Drain (30)

(pCi/kg) 6UCo 150 100(2/30)

RSLO.2HO 134 (1/2)

NA 0

(65-134) 0.2 miles 1500 (<9-134)

Cs 150 53 (21/30)

RSLO.2HO2 132 (1/2)

(18-182) 0.2 miles 1500 (<11-182)

NA 0

Cs150

<LLD

<LLD NA 0

54Mn 150 11 (1/30)

RSLO.2HO2 11 (1/2)

(11-11) 0.2 miles 1500 (11-11)

NA 0

a Mean and Range based upon detectable measurements only.

in parentheses. (f)

Fraction of detectable measurements at specified locations is indicated 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 13 2001 AREOR

TABLE 2 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM ANNUAL

SUMMARY

Name of Facility Rancho Seco Nuclear Station Docket No. DPR-54 Location of Facility Sacramento. California (County, State)

Reporting Period January - December 2001 Medium or Type and Lower All Indicator Location with Highest Annual Control locations Number of Pathway Total Limit of Locations Mean Mean (f)a Nonroutine Sampled Number of Detection Mean (f)b Name Mean (f) b Range Reported (Unit of Analysis-(LLD) b Range Distance Range Measurements Measurement)

Performed

& Direction Soil Depression Area y-spec (pCi/kg)

(14)

WCo 150 449 (7/14)

RSL0.4MP1 908 (2/2)

(70-959) 0.4 miles 2480 (856-959)

NA 0

150 8637 (14/14)

RSLO.4MP1 31895 (2/2)

(34-32190) 0.4 miles 248°(31600-32190)

NA 0

4Cs 150

<LLD

<LLD NA 0

Sediment y-spec (pCi/kg)

(24)

"bCo 150 18 (5/24)

RMSO.6MO 18 (8/8)

NA 0

(14-26) 0.6 miles 2480 (10-26)

Cs 150 123 (22/24)

RMSO.6MO 224 (8/8) 134__

(18-366) 0.6 miles 2480 (102-366)

NA 0

_Cs 150

<LLD

<LLD NA 0

Mean and Range based upon detectable measurements only. Fraction of detectable measurements at specified locations is indicated in parentheses. (f) bLLD 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 2001 AREOR 14

TABLE 2 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM ANNUAL

SUMMARY

Name of Facility Rancho Seco Nuclear Station Docket No. DPR-54 Location of Facility Sacramento, California (County, State)

Reporting Period January - December 2001 Medium or Type and Lower All Indicator Location with Highest Annual Control locations Number of Pathway Total Limit of Locations Mean Mean (f) a Nonroutine Sampled Number of Detection Mean (f)b Name Mean (f) b Range Reported (Unit of Analysis (LLD) b Range Distance Range Measurements Measurement)

Performed

& Direction Fish (pCi/kg) y-spec b4Mn 130

<LLD

<LLD NA 0

6 Co 130

<LLD

<LLD NA 0

bZn 260

<LLD

<LLD NA 0

131Cs 130 39 (2/2)

RFSO.6MO 39 (2/2)

(21-57) 0.6 miles 2480 (21-57)

NA 0

1*Cs 130

<LLD

<LLD NA 0

Algae y-spec (pCi/kg)

(8) buCo 150

<LLD

<LLD NA 0

150 23.5 (7/12)

RAGO.6NO 33 (2/2)

(10-57) 0.6 miles 2700 (9-57)

NA 0

_-"_Cs 150

<LLD

<LLD NA 0

aMean 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 2001 AREOR 15

TABLE 2 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM ANNUAL

SUMMARY

Name of Facility Rancho Seco Nuclear Station Docket No. DPR-54 Location of Facility Sacramento. California (County, State)

Reporting Period January - December 2001 Medium or Type and Lower All Indicator Location with Highest Annual Control locations Number of Pathway Total Limit of Locations Mean Mean (f) b Nonroutine Sampled Number of Detection Mean (f)b Name Mean (f) b Range Reported (Unit of Analysis (LLD) b Range Distance Range Measurements Measurement)

Performed

& Direction Well Water Gross t3 4

3.6 (16/35)

RWW0.8LO 6.38 (2/4) 2.6 (2/4) 0 (pCi/L)

(35)

(2.1-8.7) 0.8 miles 2250 (4.08-8.68)

(2.4-2.9)

Tritium 1000

<LLD

<LLD 0

(39)

,-spec (35) 54Mn 15

<LLD

<LLD 0

-WCo 15

<LLD

<LLD 0

bZn 30

<LLD

<LLD 0

13/ Cs 10

<LLD

<LLD 0

134Cs 10

<LLD

<LLD 0

Runoff Water Tritium 2000 355 (3/31)

RRWO.6MO 3551 (3/31)

NA 0

(pCi/L)

(31)

(793-6260) 0.6 miles 2480 (793-6260) y-spec (31)

_4 Mn 15

<LLD

<LLD NA 0

bOCo 15

<LLD

<LLD NA 0

bbZn 30

<LLD

<LLD NA 0

Cs 18

<LLD

<LLD NA 0

134Cs 15

<LLD

<LLD NA 0

Mean and Range based upon detectable measurements only. Fraction of detectable measurement ' 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 December 2001 16 2001 AREOR

TABLE 2 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM ANNUAL

SUMMARY

Name of Facility Rancho Seco Nuclear Station Docket No. DPR-54 Location of Facility Sacramento, California

. Reporting Period January - December 2001 (County, State)

Medium or Type and Lower All Indicator Location with Highest Annual Control locations Number of Pathway Total Limit of Locations Mean b

Mean (f)a Nonroutine Sampled Number of Detection Mean (f)b Name Mean (

Reported (Unit of Analysis (LLD) b Range Distance Range Range Measurements Measurement)

Performed

& Direction Surface Water Tritium 2000 276 (5/64)

RSWO.7NO 338 (2/12)

<LLD (pCi/L)

(64)

(199-412) 0.7 miles 2700 (263-412) y-spec (64) b4Mn 15

<LLD

<1LILD_0 50Co 15

<LLD

<LLD 0

6bZn 30

<LLD

<LLD 0

131Cs 18

<LLD

<LLD 0

134cs 15

<LLD

<<LLD

<LLD Drinking Water Gross 13 4

3.3 (8/12)

RDW0.1GO 3.3 (8/12) 3.3 (8/12) 0 (pCi/L)

(24)

(2.5-4.4) 0.1 miles 1350 (2.5-4.4)

(2.3-4.1)

Tritium 1000

<LLD 0

(24) y-spec (24) b4Mn 15

<LLD

<LLD 0

bUCo 15

<LLD

<LLD 0

bbZn 30

<LLD

<LLD 0

Mic 10

<LLD

<LLD 0

1 4Cs 10

<LLD

<LLD 0

Mean and Range based upon detectable measurements only. Fraction of detectable measurements% at specified locations is indicated in parentheses. (f) bLLD 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).

Nuclear Station 17 onlA

ADIc, Rancho Seco I L.UU I tAnu-uIn

TABLE 2 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM ANNUAL

SUMMARY

. Name of Facility Rancho Seco Nuclear Station Docket No. DPR-54 Location of Facility Sacramento, California (County, State)

Reporting Period January - December 2001 Medium or Type and Lower All Indicator Location with Highest Annual Control locations Number of Pathway Total Limit of Locations Mean Mean (f) a Nonroutine Sampled Number of Detection Mean (f)b Name Mean (f) b Range Reported (Unit of Analysis (LLD) b Range Distance Range Measurements Measurement)

Performed

& Direction Rain Water Tritium 2000

<LLD

<LLD NA 0

(pCi/L)

(16) y-spec (16)

_Mn 15

<LLD

<LLD NA 0

bOCo 15

<LLD

<LLD NA 0

Zn 30

<LLD

<LLD NA 0

T3s 18

<LLD

<LLD NA 0

Cs 15

<LLD

<LLD NA 0

aMean 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 18 2001 AREOR

V. REFERENCES CFRa Code of Federal Regulations, 2000, "National Primary Drinking Water Regulations," Title 40, Part 141.

CFRb Code of Federal Regulations, 2000, "Standards for Protection Against Radiation," Title 10, Part 20.

CFRc Code of Federal Regulations, 2000, "Domestic Licensing of Production and Utilization Facilities," Title 10, Part 50.

CFRd Code of Federal Regulations, 2000, "Environmental Radiation Protection Standards for Nuclear Power Operations," Title 40, Part 190.

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).

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 10CFR50, 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," NU REG-0472, Revision 2.

NUREG80a United States Nuclear Regulatory Commission, 1980, "Methods for Demonstrating LWR Compliance with the EPA Uranium Fuel Cycle Standard (40CFR190)," NUREG-0543.

RS01 Rancho Seco Nuclear Station, 2001, "Annual Radioactive Effluent Release Report, January -December 2001," Sacramento Municipal Utility District report.

Rancho Seco Nuclear Station 19 2001 AREOR

VI.

APPENDICES Rancho Seco Nuclear Station 20 2001 AREOR

APPENDIX A 2000 LAND USE CENSUS RESULTS In compliance with the Rancho Seco Permanently Defueled Technical Specifications, section D6.8.3.b.2 and the REMP Manual, section 4.0, "Land Use Census", a land use census was completed on February 27, 2001. The method of conducting the primary survey was to use an aerial survey that was conducted during June 2000. Evaluating the aerial photographs continues to provide an accurate method of determining locations and distances of the nearest residences.

For the 2000 Land When the review of the survey photos indicated that an actual on-scene survey was needed to verify the use of identified structures; a visual observation was made. 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 2000 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 1 OCFR50, Appendix I, section IV.B.3.

The Land Use Census is completed on a biennial schedule. Aerial surveys will be conducted during 2002 and the Gait Irrigation report covering 2001 and 2002 will be requested during the last quarter of 2002. This information will be used to complete the 2002 census, which is scheduled to be completed in 2003.

Rancho Seco Nuclear Station A-1 2001 AREOR

A.

RESIDENT EXPOSURE PATHWAY

SUMMARY

Inhalation, Ground Plane and Water Consumption The 2000 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:

Distance to residence updated using GPS, no change in ranking from previous census It is expected that all seven residences use well water for consumption and other domestic purposes.

Rancho Seco Nuclear Station Sector Distance Ranking (meters)

(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 A-2 2001 AREOR

B.

DEPOSITION EXPOSURE PATHWAY

SUMMARY

Beef Consumption Based on conservative dose calculation parameters in use, the following is a summary for the 2000 land use census of the potential deposition exposure pathways at the locations listed below:

Sector Distance Consumption Pathway Comment (meters)

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 o

579*

Beef Unrestricted Area Boundary R

448 Beef Unrestricted Area Boundary

Distance updated using GPS Because of the extremely small amount of radioactive gaseous effluent released from the site, Deposition Exposure Pathway changes were considered inconsequential. The changes indicated in the beef consumption table do not necessitate modification of ODCM or REMP practices.

Rancho Seco Nuclear Station A-3 2001 AREOR

C.

IRRIGATED CROP EXPOSURE PATHWAY

SUMMARY

Laguna Creek Gait Irrigation District The Gait Irrigation District's 1999 Crop Report stated 3211.242 acre-feet of Laguna Creek water was diverted for irrigation purposes during the 1999 crop production season. Crops irrigated were sudan, clover, pasture, corn, and alfalfa over a total of 986 acres.

The Gait Irrigation District's 2000 Crop Report stated 2296.37 acre-feet of Laguna Creek water was diverted for irrigation purposes during the 2000 crop production season. Crops irrigated were corn, rice, clover, pasture sudan and alfalfa over a total of 1201 acres Clay Irrigation District The Clay Irrigation District's 1999 Irrigation Report stated 4513 acre-feet of Laguna Creek water was diverted for irrigation purposes during the 1999 season. The water diverted was reported to be used for pasturage. No acreage numbers were reported The Clay Irrigation District's 2000 Irrigation Report stated 4390 acre-feet of Laguna Creek water was diverted for irrigation purposes during the 2000 season. The water diverted was reported to be used for pasturage. No acreage numbers were reported This usage reported for 1999 and 2000 is reported as an estimate. The estimate was determined to be one third of the total discharge from Rancho Seco. The other two thirds is estimated to be used by Gait Irrigation District.

Rossini Farming Company In addition to the above, SMUD has contracted with Rossini Farming Co., the owners of the vineyards adjacent to Rancho Seco Station, to supply irrigation water from Clay Creek on an as needed basis.

The following information was reported by the Rancho Seco Quality Group, which monitors the usage. From January 14, 1999 to December 7, 2000 a total of 122.895 Acre-feet of water was used from the effluent creek for irrigating purposes for the vineyards.

Rancho Seco Nuclear Station A-4 2001 AREOR

D.

OTHER EXPOSURE PATHWAYS The 2000 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.

Past census evaluations have been unsuccessful in determining the usage/ occupancy factors for this consumption. Therefore, insufficient data existed to justify ODCM usage factor modification.

E.

REMP EVALUATION

/

An objective of the 2000 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 The inhalation and ground plane exposure pathways, the principal components of the Resident Exposure Pathway, are monitored directly and indirectly by Luxel dosimetry, air, and soil sampling and analysis. Well water was monitored at nine 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.

Irriqated Cron Exposure Pathway The REMP was effective in monitoring the identified irrigated crop exposure pathways. This conclusion was because the REMP included irrigated vegetation sampling. The commercial grape vineyards are being evaluated and a sample program has been established as the vineyards reached maturity.

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 2001 AREOR

E.

REMP EVALUATION (continued)

Other Exposure Pathways Existing aquatic life, surface water and sediment sampling and 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 2000 Land Use Census findings, the following potential exposure pathways exist at the indicated locations:

GASEOUS EFFLUENT Exposure Pathway Inhalation Ground Plane

updated using GPS LIQUID EFFLUENT Exposure Pathway Freshwater Fish Swimming Shoreline Deposits Irrigated vegetation Irrigated forage Drinking Water Location 1175* m ENE 1175* m ENE Location Clay Creek Clay Creek Clay Creek Clay Creek Clay Creek Clay Creek Comment Resident location having the highest dispersion parameter Resident location having the highest deposition parameter Comment Recreation beyond the Site Boundary Recreation beyond the Site Boundary Recreation beyond the Site Boundary Commercial vineyards and potential residences beyond the site boundary Cattle grazing beyond the Site Boundary Cattle drinking water beyond the Site Boundary Rancho Seco Nuclear Station A-6 2001 AREOR

F.

ODCM EVALUATION (continued)

The GASEOUS EFFLUENT locations for inhalation and ground plane used by the ODCM are conservative since they are located at the Station 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.

As required by the 2000 Land Use Census the above information for exposure pathways and locations was submitted for incorporation in the ODCM for use during 2001.

Rancho Seco Nuclear Station A-7 2001 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:

Air Runoff Water Surface Water Drinking Water Well Water Mud and Silt SL Soil FS Fish LV Garden Vegetable AG Algae TL Direct Gamma Radiation (Luxel)

RN Rainwater 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 0 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 AS RW SW DW WW MS B-1 2001 AREOR

SAMPLE SITE DESCRIPTIONS AND MAPS (continued)

The final letter designation indicates if the location is part of the operational REMP program ("0")

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.

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

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

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

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 Figure B-1 Figure B-2 Figure B-3 Figure B-4 B-2 2001 AREOR

- 22'I I

.20

'19

(#5)

(#4)

Figure B-1 Radiological Environmental Sampling Locations on and near tke Site (Storm Drain location numbers are in parenthesis)

Rancho Seco nuclear Station B-3 2001 AREOR

N S

Figure B-2 Radiological Environmental Sampling Locations within 1 mile from the Reactor Building Rancho Seco Nuclear Station B-4 2001 AREOR

-SMWPRCPERry OOUNORY Radiological Environmental Sampling Locations from 1 to 5 miles from the Reactor Building Rancho Seco Nuclear Station B-5 2001 AREOR Figure B-3

SUM Ph* PETY DOLNDR1' Radiological Environmental Sampling Locations 5 to 25 miles from the Reactor Building Rancho Seco Nuclear Station B-6 2001 AREOR Figure B-4

Table B-1 Radiological Environmental Monitoring Sites and Map Locations Sample Type ID Code Class Map Location Collection Frequency Description. of Location Miles Sector No.

AIR RASO.1CO IND.

1 Weekly On Site-PAP BLDG.

0.1 C

AIR RASO.7EO IND.

2 Weekly Meteorological Tower 0.7 E

AIR RASO.3MO IND.

3 Weekly Effluent Discharge 0.3 M

AIR RAS1.8FP CON 30 Weekly Rancho Seco Reservoir Well Enclosure 1.8 F

RUNOFF WATER RRWO.6MO IND.

5 Biweekly Site Boundary 0.6 M

SURFACE WATER RSWO.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 RSWO.3MO IND.

3 Monthly Composite ISCO Composite Sampler at Effluent Discharge 0.3 M

SURFACE WATER RSW1.8N0 IND.

9 Monthly Confluence of Clay and Hadselville Creeks 1.8 N

DRINKING WATER RDW0.1G0 IND.

10 Monthly Rancho Seco Site 0.1 G

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

WELL WATER RWWO.3EO IND.

11 Quarterly Site Well 0.3 E

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

WELL WATER RWW0.8L0 IND.

13 Quarterly Clay Cattle Feedlot 0.8 L

WELL WATER RWW3.7MO IND.

8 Quarterly Silva Feed Lot Well 3.7 M

WELL WATER RWW2.1M0 IND.

14 Quarterly Clay Area Well (Tipling's) 2.2 M

WELL WATER RWW1.5MP IND.

49 Quarterly Vineyard Well (west) 1.5 M

WELL WATER RWWO.7RP IND 60 Quarterly Vineyard Well (northwest of Hwy 104) 0.7 R

WELL WATER RWWO.6RP IND 59 Quarterly Vineyard Well (south of Hwy 104) 0.6 R

WELL WATER RWW0.9CP IND 63 Quarterly Vineyard Well (northeast of site) 0.9 C

RAIN WATER RRNO.8DO IND.

2 Seasonal Meteorological Tower 0.8 D

Rancho Seco Nuclear Station B-7 2001 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 RMSO.3MO IND.

3 Quarterly Effluent Discharge 0.3 M

MUD AND SILT RMSO.6MO IND.

5 Quarterly Site Boundary 0.6 M

MUD AND SILT RMSO.7NO IND.

6 Quarterly Water Sump 0.7 N

MUD AND SILT RMS1.8NO IND.

9 Quarterly Confluence of Cla and Hadselville Creeks 1.8 N

MUD AND SILT RMS3.7NO IND.

8 Quarterly Laguna Creek at Folsom South Canal 3.7 N

FISH RFSO.3MO IND.

3 Semi-Annual Effluent Discharge 0.3 M

FISH RFSO.6MO IND.

5 Semi-Annual Site Boundary 0.6 M

FISH RFSO,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 Cla and Hadselville Creeks 1.8 N

ALGAE RAGO.3MO IND.

3 Semi-Annual Effluent Discharge 0.3 M

ALGAE RAGO,6MO IND.

5 Semi-Annual Site Boundary 0.6 M

ALGAE RAG0.7NO IND.

6 Semi-Annual Water Sump 0.7 N

ALGAE RAGI.8NO IND.

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

ALGAE RAG3,7NO IND.

8 Semi-Annual Hadselville Creek at Folsom South Canal 3.7 N

SOIL RSLO.2H01 IND.

16 Semi-Annual Storm Drain No. 1 0.2 H

SOIL RSLO.2HO2 IND.

17 Semi-Annual Storm Drain No. 2 0.2 H

SOIL RSLO.2JO IND.

18 Semi-Annual Storm Drain No. 3 0.2 J

SOIL RSLO.2KO IND.

19 Semi-Annual Storm Drain No. 4 0.2 K

SOIL RSLO.3LO IND.

20 Semi-Annual Storm Drain No. 5 0.3 L

SOIL RSLO.2HO IND.

21 Semi-Annual Storm Drain No. 6 0.2 H

SOIL RSLO.3MO7 IND.

22 Semi-Annual Storm Drain No. 7 0.3 M

SOIL RSLO.3MO8 IND.

23 Semi-Annual Storm Drain No, 8 0.3 M

SOIL RSLO.3MO9 IND.

24 Semi-Annual Storm Drain No. 9 0.3 M

SOIL RSLO.3AO IND.

26 Semi-Annual Storm Drain No. 10 0.3 B

SOIL RSL0.3N0 IND.

27 Semi-Annual Storm Drain'No. 12 0.3 N

SOIL RSLO.3Q0 IND.

28 Semi-Annual Storm Drain No. 11 0.3 Q

Rancho Seco Nuclear Station 2001 AREOR B-8

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 SOIL RSLO.6MO IND.

5 Semi-Annual Site Boundary 0.6 M

SOIL RSLO.7NO IND.

6 Semi-Annual Water Sump 0.7 N

SOIL RSL1.5N0 IND.

25 Semi-Annual Silva Property 1.5 N

SOIL RSL1.8NO IND.

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

SOIL RSLO.4MP1 IND.

29 Semi-Annual Depression Area 0.4 M

SOIL RSLO.4MP2 IND.

29 Semi-Annual Depression Area 0.4 M

SOIL RSLO.4MP3 IND.

29 Semi-Annual Depression Area 0.4 M

SOIL RSL0.3NP!

IND.

50 Semi-Annual ISFSI north drainage 0.3 N

SOIL RSLO.3NP2 IND.

51 Semi-Annual ISFSI south drainage SOIL RSLO.3NP3 IND.

52 Semi-Annual ISFSI combined drainage SOIL RSLO.5MPAK IND.

5 Semi-Annual Site Boundary 0.5 M

SOIL RSL0.5MPAL IND.

5 Semi-Annual Site Boundary 0.5 M

SOIL RSLO.5MPAM IND.

5 Semi-Annual Site Boundary 0.5 M

SOIL RSLO.5MPAN IND.

5 Semi-Annual Site Boundary 0.5 M

GARDEN RLVO.6MO IND.

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

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

local area GRAPES GRAPES RLVO.7NO IND -

64 Annual Vineyard west of site 0.7 N

Rancho Seco Nuclear Station B-9 2001 AREOR

Table B-1 (Continued)

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

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

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

LUXEL RTLO.3C0 IND.

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

LUXEL RTLO.3NO IND.

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

LUXEL RTLO.3L0 IND.

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

LUXEL RTLO.3H0 IND.

33 Quarterly Perimeter Fence/ S/0 of Admin. Bldg.; #5 0.3 H

LUXEL RTLO.4F0 IND.

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

LUXEL RTLO.5CO IND.

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

LUXEL RTLO.6KO IND.

36 Quarterly Tokay Substation; #11 0.8 K

LUXEL RTL10.OHP CON 57 Quarterly Fish Hatchery at Comanche Lake, #15 10.0 H

LUXEL RTL2.7MO IND.

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

LUXEL RTL8.2KO IND.

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

LUXEL RTL7.8CO IND.

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

LUXEL RTLO.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 IND.

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

LUXEL RTL1.8F0 IND.

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

LUXEL RTL1 ADO IND.

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

LUXEL RTL10.OEP CON 58 Quarterly Preston School entrance on pole, #51 10.0 E

LUXEL RTL8.OPO IND.

47 Quarterly Dillard School; #55 8.0 P

LUXEL RTLO.8DO IND.

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

LUXEL RTLO.6MO IND.

5 Quarterly Site Boundary Irrigated Garden; #65 0.6 M

LUXEL RTLO.4NO IND.

29 Quarterly Depression @ Clay Creek; #66 0.4 N

LUXEL RTLO.4N01 IND.

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

LUXEL RTLO,3P0 IND.

48 Quarterly West Fence; #68 0.3 P

LUXEL RTLO.3NP IND.

53 Quarterly West Garden, #88 0.3 N

LUXEL RTLO.4NP IND.

54 Quarterly Southwest ISFSI, #89 0.4 N

LUXEL RTLO.5NP IND.

55 Quarterly Northwest ISFSI, #90 0.5 P

LUXEL RTLO.3QP IND.

56 Quarterly Northeast ISFSI, #91 0.3 Q

LUXEL RTLO.7QP IND.

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

LUXEL RTLO.7JP IND.

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

LUXEL RTLO.4PP IND.

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

Rancho Seco Nuclear Station B-10 2001 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:

SSample collection, SPackaging, SShipment and receipt, SMeasurements of radioactivity, SData evaluation, and SReporting.

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 (Thermo Nutech), 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 Eberline Services participates in the Interlaboratory Comparison Program (ICP). 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 the Department of Energy (DOE). Participation in an ICP is a requirement of the Permanently Defueled Technical Specification (section D6.8.3.b.3). 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, and other laboratories. 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-1 2001 AREOR

INTERLABORATORY COMPARISON PROGRAM (continued)

The Intercomparison Program consists of a variety of sample media spiked with known quantities of specific radioactive materials at levels normally found in environmental samples. These levels are generally quite low. 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, the laboratories provide 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.

If the results of a determination by Eberline Services in the lOP is outside the specified control limits or do not pass the outliers test, Eberline Services must investigate and, if a problem is identified, take corrective action to prevent problem recurrence.

From December 2000 to December 2001, Eberline Services analyzed 35 lOP samples related to the current REMP program. All sample results reported by Eberline Services were within the control limits.

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 operate 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-2 2001 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.

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

DIRECT RADIATION (Luxel) COMPARISON PROGRAM The monitoring badge vendor, Landauer (Luxel), participated in a blind spike comparison-testing programs. Landauer participated in a biennial program provided by the Idaho National Environmental Laboratory (INEL). The results from this study were not available for inclusion in this report. Landauer also maintains NVLAP certification with NIST. A review of Landauer's NVLAP certification results indicates that Landauer has satisfactorily completed all of the required tests for the types of environmental radiation monitored at RSNS.

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

Rancho Seco Nuclear Station C-3 2001 AREOR

TABLE C-1 2001 INTERLABORATORY COMPARISON PROGRAM Sample Type Sample Date Assay Type EML Result Eberline Result Control Limits (QAP 53)

Reported/Range Air Filter 12/00 Co-60 8.430+/-0.480 7.360 +/- 0.190 0.79-1.30 Air Filter 12/00 Cs-1 37 7.410 +/- 0.360 6.580 +/- 0.200 0.78-1.35 Air Filter 12/00 Gross Beta 1.520 +/-0.150 1.150 +/-0.050 0.76-1.52 Air Filter 12/00 Mn-54 43.200+/-1.300 38.570+/-0.360 0.80-1.36 Soil 12/00 Cs-1 37 1020.000 +/-51.000 1002.000 +/-8.000 0.80-1.29 Vegetation 12/00 Co-60 32.800 +/-1.300 31.050 +/-.2.780 0.75-1.51 Vegetation 12/00 Cs-137 867.000 +/-44.000 862.4000 +/-6.900 0.80-1.37 Water 12/00 Co-60 73.700 +/-2.900 73.650 +/-1.250 0.80-1.20 Water 12/00 Cs-1 37 67.000 +/-3.500 68.210 +/-1.040 0.80-1.24 Water 12/00 Gross Beta 950.000 +/-90.000 895.900 +/-21.100 0.56-1.50 Water 12/00 Tritium 93.100 +/-0.300 108.000 +/-7.000 0.74-2.29 Rancho Seco Nuclear Station C-4 2001 AREOR

TABLE C-1 (cont.)

2001 INTERLABORATORY COMPARISON PROGRAM Sample Type Sample Date Assay Type EML Result Eberline Result Control Limits (QAP 54)

Reported/ Range Air Filter 6/01 Co-60 19.440+/-0.500 17.880 +/- 0.560 0.79-1.30 Air Filter 6/01 Cs-1 34 2.830 +/- 0.160 3.168 +/- 0.453 0.74-1.21 Air Filter 6/01 Cs-1 37 8.760 +/- 0.340 8.510 +/- 0.373 0.78-1.35 Air Filter 6-/01 Gross Beta 2.580 +/-0.150 2.243 +/-0.045 0.76-1,52 Air Filter 6/01 Mn-54 6.520+/-1.280 5.997+/-0.393 0.80-1.36 Soil 6/01 Cs-1 37 1740.000 +/-90.000 1798.000 +/-20.000 0.80-1.29 Vegetation 6/01 Co-60 30.400 +/-1.200 25.700 +/-.4.400

.075-1.51 Vegetation 6/01 Cs-1 37 842.000 +/-42.000 836.800 +/-11.800 0.80-1.37 Water 6/01 Co-60.

98.200 +/-3.600 109.400 +/-1.500 0.80-1.20 Water 6/01 Cs-137 73.000 +/-3.700 81.900+/-1.180 0.80-1.24 Water 6/01 Gross Beta 1297.000 +/-100.000 1240.000 +/-25.000 0.56-1.50 Water 6/01 Tritium 79.300 +/-2.000 85.520 +/-6.890 0.74-2.29 Rancho Seco Nuclear Station C-5 2001 AREOR

TABLE C-1 (cont.)

2001 INTERLABORATORY COMPARISON PROGRAM Sample Type Sample Date Assay Type EML Result Eberline Result Control Limits (QAP 55)

Reported/ Range Air Filter 12/01 Co-60 17.500+/-0.470 15.540 +/- 0.350 0.79-1.30 Air Filter 12/01 Cs-1 34 12.950 +/- 0.362 14.090 +/- 0.660 0.74-1.21 Air Filter 12/01 Cs-1 37 17.100 +/- 0.580 15.550 +/- 0.350 0.78-1.35 Air Filter 12/01 Gross Beta 12.770 +/-1.277 11.750 +/-0.590 0.76-1.52 Air Filter 12/01 Mn-54 81.150+/-4.760 74.6100+/-0.620 0.80-1.36 Soil 12/01 Cs-1 37 612.330 +/-30.620 546.400 +/-4.600 0.80-1.29 Vegetation 12/01 Co-60 35.300 +/-1.436 30.950 +/-.1.410

.075-1.51 Vegetation 12/01 Cs-i137 1030.000 +/-51.800 928.000 +/-4.000 0.80-1.37 Water 12/01 Co-60 209.000 +/-7.590 228.400 +/-2.300 0.80-1.20 Water 12/01 Cs-137 45.133 +/-2.467 52.250+/-1.270 0.80-1.24 Water 12/01 Gross Beta 7970.000 +/-800.000 8125.000 +/-406.000 0.56-1.50 Water 12/01 Tritium 207000 +/-2.690 221.420 +/-9.690 0.74-2.29 Rancho Seco Nuclear Station C-6 2001 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 DIRECT RADIATION An air sampler continuously moves air through a filter paper designed to capture particulates by filter paper impaction. The air samplers are equipped with a flow totalizer, which measures 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.

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-1 2001 AREOR

Collection/Analysis Method SOIL &

SEDIMENT GARDEN PRODUCE FISH ALGAE WATER Samples of sediment and soil are collected from the top three inches of the sampled material. Sediment samples are obtained approximately two feet from the shoreline. Each sample is assayed directly for gamma isotopic radioactivity by gamma spectroscopy.

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. During 2001 samples were also collected from the vineyards near the site.

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.

Samples of algae in the Clay Creek system are collected semi-annually and assayed directly for gamma isotopic radioactivity by gamma spectroscopy.

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

0 0

RAIN WATER 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.

Samples of rainwater are collected on a seasonal basis. All samples are assayed for tritium by liquid scintillation and for gamma isotopic radioactivity by gamma spectroscopy.

Rancho Seco Nuclear Station Sample Media D-2 2001 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-Operation 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 2001 the program was directed and executed by the Radiation Protection/ Chemistry Superintendent. The Technical Staff and the Chem./Rad Decommissioning Technicians perform sample collection. The Radiological Health Supervisor performs data review and Program maintenance. 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 Permanently Defueled Technical Specifications 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:

occurring background, during normal operations, weapons testing, and major global nuclear accidents Rancho Seco Nuclear Station E-1

. 2001 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, 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 Permanently Defueled Technical Specifications administrative requirements for the REMP program were not revised during 2001. The REMP manual was revised during 2001. Revision 13 to the REMP manual was an editorial revision to change the word "position" to "positive" in footnote "a" of Table 2, located on page 23 of the manual.

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.

Rancho Seco Nuclear Station 2001 AREOR E-2

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

1. Gaseous effluents

2. Liquid effluents and

3. Direct radiation from these effluents and onsite sources.

Gaseous Effluents Gaseous ventilation and process effluents are released, through particulate filtration units to the environment from the Reactor Building and Auxiliary Building stacks.

In the gaseous pathway, airborne radioactive materials can be inhaled or ingested by humans.

Animals can inhale or ingest radioactive material present in the atmosphere, which are retained in animal food products (meat or milk). Radioactive materials, which are carried by air currents, can also be deposited on vegetation or water sources, which are in turn directly consumed by humans or animals.

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 vessels, which are contained within the site boundary. People can potentially be exposed to direct radiation from gaseous effluents or from ground deposition of particulates deposited on the ground from gaseous or liquid effluents. With the off-loading of spent fuel to the ISFSi, the ISFSI has become part of the direct radiation pathway.

Rancho Seco Nuclear Station E-3 2001 AREOR

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 2000 are presented in Appendix A of this Report. The next scheduled land use census will be conducted in 2002 and reported in the 2002 AREOR. 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.

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 United States Nuclear Regulatory Commission and 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-2001) 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.

Rancho Seco Nuclear Station E-4 2001 AREOR

MONITORING LOCATION SELECTION (continued)

Gaseous effluent indicator monitoring sites are generally placed in areas, which receive prevailing winds crossing the Rancho Seco site. 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 10CFR5O, 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.

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 and to provide operational data for the Interim Spent Fuel Storage Installation (ISFSI).

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

Rancho Seco Nuclear Station E-5 2001 AREOR

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. Four air sampler locations are used to collect weekly air samples. Two locations (Meteorological Tower and Rancho Seco Reservoir) are control locations 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.

There are 35 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, soil, and garden vegetation to measure the quantity of radioactive material deposited from gaseous and liquid effluents. There are five mud and silt, 26 soil, and 2 garden vegetation locations. Two vineyard sample locations were administrated added during 2001.

Aquatic monitoring includes the sampling of fish and algae. Algae is an excellent concentrator of radioactivity contained in water and is sampled to provide an early indication of increased liquid radioactive material concentration. There are four fish and five algae sample locations.

Rancho Seco Nuclear Station E-6 2001 AREOR

SAMPLE MEDIA (continued)

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 nine groundwater wells and two drinking water taps.

Rainwater is also collected at one location on a seasonal basis.

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 2001 Radiological Environmental Monitoring Program are presented in Table 2.

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

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.

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.

Rancho Seco Nuclear Station E-7 2001 AREOR

REGULATORY REPORTING LEVELS (continued)

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 200,1.

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 efficiency from sample collection to measurement detection efficiency for the nuclides (energies) of interest

= Background radiation levels

Chemical recovery factors 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.

Rancho Seco Nuclear Station E-8 2001 AREOR

SENSITIVITY OF THE REMP MEASUREMENT PROCESS (continued)

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 2001 AREOR

TABLE E-1 REPORTING LEVELS FOR RADIOACTIVITY CONCENTRATIONS IN ENVIRONMENTAL SAMPLES Water Airborne Fish Food Analysis (pCi/L)

Particulate or (pCi/kg, wet)

Products Gases (pCi/rn3)

(pCi/kg, wet)

H-3 2 0 00 0a Mn-54 1000 30000 Co-60 300 10000 Zn-65 300 20000 Cs-134 30 10 1000 1000 Cs-1 37 50 20 2000 2000 Gross Beta 4 0 b 2 c 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 is 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 Notes:

E-1 0 2001 AREOR

TABLE E-2 MAXIMUM (REQUIRED) LLD VALUES FOR ENVIRONMENTAL SAMPLESac (NRC79A)

Airborne Fish Food Sediment Analysis Water Particulate (pCi/kg, Products (pCi/kg, dry)

(d)

(pCi/L) or Gases wet)

(pCi/kg, dry)

S(pCilm

3)

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

Mn-54 15 130 Co-60 15 130 150e Zn-65 30 260 Cs-134 15(10")

0.01 d 130 60 150 Cs-137 18(10) 0.0 1d 130 60 150 (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/m 3 (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-1 34 and Cs-1 37.

Rancho Seco Nuclear Station Notes:

E-1 1 2001 AREOR

APPENDIX F 2001 SAMPLE ANALYSIS RAW DATA TABLES Rancho Seco Nuclear Station F-1 2001 AREOR

TABLE F-1 2001 WEEKLY AIR SAMPLE

SUMMARY

Gross Beta Activity in Air Particulates (pCi/m 3)

Collect Date RAS01CO 2 sigma RAS03MO 2 sigma RAS07EO 2 sigma RAS18FP 2sigma 1/2/2001 0.072 0.002 0.060 0.002 0.072 0.003 0.0651 0.002 1/8/2001 0.081 0.003 0.085 0.002 0.093 0.003 0.085 0.004 1/16/2001 0.014 0.001 0.014 0.001 0.015 0.001 0.014 0.001 1/23/2001 0.042 0.002 0.041 0.002 0.044 0.002 0.039 0.004 1/30/2001 0.014 0.001 0.015 0.001 0.016 0.001 0.015 0.001 2/6/2001 0.037 0.001 0.036 0.001 0.037 0.001 0.038 0.001 2/13/2001 0.012 0.001 0.012 0.001 0.012 0.001 0.012 0.001 2/20/2001 0.019 0.001 0.019 0.001 0.018 0.001 0.020 0.001 2/26/2001 0.010 0.002 0.000 0.000 0.008 0.001 0.008 0.001 3/6/2001 0.019 0.001 0.018 0.001 0.018 0.001 0.020 0.001 3/13/2001 0.017 0.001 0.014 0.002 0.017 0.001 0.016 0.001 3/20/2001 0.021 0.001 0.020 0.003 0.019 0.001 0.021 0.001 3/27/2001 0.017 0.001 0.016 0.002 0.017 0.001 0.017 0.001 4/2/2001 0.015 0.001 0.017 0.002 0.014 0.001 0.015 0.001 4/10/2001 0.011 0.001 0.012 0.001 0.012 0.001 0.010 0.001 4/16/2001 0.015 0.001 0.015 0.001 0.015 0.001 0.015 0.001 4/23/2001 0.013 0.001 0.013 0.001 0.013 0.001 0.012 0.001 4/30/2001 0.016 0.001 0.015 0.001 0.016 0.001 0.015 0.001 5/7/2001 0.019 0.001 0.019 0.001 0.018 0.001 0.018 0.001 5/15/2001 0.020 0.001 0.021 0.001 0.022 0.001 0.019 0.001 5/22/2001 0.018 0.001 0.018 0.001 0.018 0.001 0.018 0.001 5/29/2001 0.019 0.001 0.019 0.001 0.019 0.001 0.019 0.001 6/4/2001 0.018 0.001 0.017 0.001 0.018 0.001 0.017 0.001 6/11/2001 0.013 0.001 0.025 0.001 0.014 0.001 0.014 0.001 6/19/2001 0.016 0.001 0.027 0.001 0.016 0.001 0.022 0.001 6/25/2001 0.020 0.001 0.035 0.001 0.021 0.002 0.023 0.003 Rancho Seco Nuclear Station F-2 2001 AREOR

TABLE F-1 2001 WEEKLY AIR SAMPLE

SUMMARY

(continued)

Gross Beta Activity in Air Particulates (pCi/m 3)

Collect Date RAS01CO 2 sigma RAS03MO 2 sigma RAS07EO 2 sigma RAS18FP 2 sigma 7/3/2001 0.013 0.002 0.014 0.001 0.013 0.001 0.013 0.001 7/9/2001 0.022 0.002 0.024 0.002 0.024 0.001 0.026 0.002 7/23/2001 0.012 0.001 0.010 0.001 0.011 0.001 0.010 0.001 7/31/2001 0.012 0.001 0.013 0.001 0.012 0.001 0.013 0.001 8/7/2001 0.010 0.001 0.010 0.001 0.010 0.001 0.009 0.001 8/13/2001 0.014 0.002 0.015 0.001 0.014 0.001 0.014 0.001 8/21/2001 0.017 0.001 0.017 0.001 0.016 0.001 0.016 0.001 8/28/2001 0.014 0.001 0.015 0.002 0.014 0.002 0.014 0.002 9/4/2001 0.016 0.001 0.016 0.001 0.017 0.002 0.014 0.002 9/10/2001 0.017 0.001 0.017 0.002 0.016 0.001 0.016 0.002 9/17/2001 0.019 0.001 0.018 0.001 0.021 0.001 0.020 0.002 9/24/2001 0.028 0.001 0.027 0.002 0.027 0.001 0.027 0.002 10/2/2001 0.023 0.001 0.024 0.001 0.023 0.001 0.020 0.001 10/8/2001 0.029 0.002 0.028 0.002 0.027 0.002 0.024 0.002 10/16/2001 0.033 0.001 0.031 0.002 0.030 0.001 0.030 0.002 10/23/2001 0.034 0.002 0.034 0.002 0.033 0.001 0.031 0.002 10/30/2001 0.035 0.002 0.034 0.001 0.034 0.001 0.033 0.002 11/6/2001 0.033 0.001 0.033 0.001 0.035 0.002 0.031 0.002 11/14/2001 0.022 0.001 0.023 0.001 0.023 0.001 0.022 0.002 11/20/2001 0.046 0.002 0.042 0.001 0.043 0.002 0.043 0.002 12/4/2001 0.016 0.001 0.016 0.001 0.016 0.001 0.014 0.001 12/11/2001 0.017 0.001 0.016 0.001 0.015 0.001 0.015 0.001 12/18/2001 0.021 0.001 0.021 0.001 0.020 0.001 0.020 0.001 12/26/2001 0.015 0.001 0.014 0.001 0.015 0.001 0.014 0.001 1/2/2002 0.021 0.001 0.022 0.002 0.021 0.001 0.022 0.001 Rancho Seco Nuclear Station F-3 2001 AREOR

Table F-2 2001 Luxel Summary (Direct Radiation)

Quarterly (mRern)

ID Type 2001-1 2001-2 2001-3 2001-4 RTLO.3RO Indicator 20.0 15.0 17.0 16.0 RTLO.3CO Indicator 16.0 17.0 17.0 13.0 RTLO.3NO Indicator 19.0 18.0 17.0 15.0 RTLO.3L0 Indicator 18.0 15.0 17.0 20.0 RTLO.3HO Indicator 17.0 17.0 14.0 14.0 RTLO.4FO Indicator 15.0 18.0 14.0 17.0 RTLO.5CO Indicator 20.0 16.0 17.0 14.0 RTLO.6KO Indicator 15.0 16.0 12.0 15.0 RTL10.OHP Control 16.0 15.0 17.0 17.0 RTL2.7MO Indicator 15.0 13.0 13.0 12.0 RTL8.2KO Control 22.0 19.0 20.0 0.0 RTL7.8CO Control 14.0 0.0 14.0 15.0 RTL1.8FO Indicator 13.0 15.0 12.0 11.0 RTL1.5MO Indicator 21.0 16.0 18.0 15.0 RTL3.9KO Indicator 17.0 15.0 14.0 13.0 RTL7.4MO Control 17.0 15.0 17.0 22.0 RTL3.7NO Indicator 16.0 16.0 15.0 0.0 RTL3.8MO Indicator 17.0 16.0 16.0 13.0 RTL1.9NO Indicator 19.0 19.0 20.0 16.0 RTL1.7FO Indicator 17.0 14.0 14.0 12.0 RTL1.4DO Indicator 18.0 17.0 19.0 17.0 RTL1O.OEP Control 15.0 12.0 13.0 12.0 RTL8.OPO Control 16.0 18.0 15.0 11.0 RTLO.8DO Indicator 17.0 15.0 15.0 14.0 RTLO.6MO Indicator 17.0 15.0 13.0 10.0 RTLO.4NO Indicator 31.0 34.0 37.0 29.0 RTLO.4N01 Indicator 18.0 19.0 16.0 16.0 RTL0.3PO Indicator 17.0 15.0 15.0 14.0 RTLO.3NP Indicator 17.0 18.0 19.0 18.0 RTLO.4NP Indicator 18.0 17.0 17.0 18.0 RTLO.5NP Indicator 17.0 17.0 17.0 18.0 RTLO.3QP Indicator 16.0 16.0 14.0 14.0 RTLO.7QP Indicator 17.0 19.0 15.0 15.0 RTLO.7J,0 Indicator 19.0 16.0 15.0 13.0 RTLO.4PP Indicator 18.0 17.0 18.0 17.0 Rancho Seco Nuclear Station F-4 2001 AREOR

Table F-3 2001 Garden Vegetables Semi-annual (pCi/kg, wet)

Sample ID Collection Date Mn-54 Co-60 Zn-65 Cs-134 Cs-137 Tritium RLVO.6MO 2/20/2001

<7.9

<9.5

<20

<11

<7.9 RLV18.OKO 2/20/2001

<4.5

<5.6

<12

<5.8

<4.7 RLVO.6MO 4/2/2001

<9.2

<9.0

<20

<32

<10 RLV1 8.0KO 4/2/2001

<9.9

<24

<26

<13

<12 RLVO.6MO 8/7/2001

<12

<15

<29

<15

<11 RLV18.0KO 8/7/2001

<7.5

<8.6

<19

<9.2

<7.9 RLVO.6MO 9/10/2001

<11

<15

<29

<14

<11 RLVO.7NO 9/10/2001

<5.4

<5.9

<15

<6.2

<5.3 RLV18.0KO 9/10/2001

<13

<30

<16

<14 RLV18.0KO 9/10/2001

<6.3

<6.9

<15

<8.0

<6.2 RLVO.6BP 11/14/2001

<98 RLVO.6MO 11/15/2001

<13

<16

<30

<14

<12 RLV18.OKO 11/20/2001

<11

<27

<14

<11 Rancho Seco Nuclear Station F-5 2001 AREOR

Table F-4 2001 SEDIMENT Quarterly (pCi/kg)

Sample ID Collection Date Mn-54 Co-60 Zn-65 Cs-134 Cs-137 RMS1.8NO 2/5/2001

<11

<14

<35

<14 119 RMSO.6MO 2/5/2001

<8.2 14.2

<13

<9.3 177 RMSO.3MO 2/5/2001

<14

<13

<32

<17 72.4 RMS3.7NO 2/5/2001

<9.7

<9.2

<23

<12 22.6 RMSO.6MOQ 2/5/2001

<8.6 25.9

<22

<11 266 RMSO.7NO 2/5/2001

<4.7

<5.2

<11

<7.2 127 RMSO.6MOQ 5/7/2001

<4.5 9.84

<9.8

<8.3 225 RMSO.7NO 5/7/2001

<8.4

<9.1

<23

<16 48.9 RMS1.8NO 5/7/2001

<7.2

<8.9

<19

<10 122 RMSO.6MO 5/7/2001

<4.8

<18

<11

<16 267 RMSO.3MO 5/7/2001

<4.5

<4.6

<9.4

<12

<8.5 RMS3.7NO 5/7/2001

<3.8

<4.1

<8.4

<6.6

<5.3 RMSO.7NO 8/7/2001

<4.3

<4.5

<12

<5.7 44.7 RMS1.8NO 8/7/2001

<9.3

<10

<27

<12 64.0 RMSO.6MO 8/7/2001

<4.1

<8.4

<10

<9.4 119 RMSO.3MO 8/7/2001

<6.5

<8.5

<16

<8.2 37.4 RMS3.7NO 8/7/2001

<3.5

<4.5

<10

<6.1 47.2 RMSO.6MOQ 8/7/2001

<6.1

<14

<7.1 102 RMSO.3MO 11/6/2001

<4.4

<5.1

<9.7

<5.9 29.8 RMS3.7NO 11/6/2001

<8.4

<9.4

<25

<11 17.6 RMSO.6MOQ 11/6/2001

<6 15.0

<20

<8 268 RMSO.7N0 11/6/2001

<5

<10

<6 73.7 RMS1.8NO 11/6/2001

<8

<20

<10 87.3 RMSO.6MO 11/6/2001

<5.2 22.4

<15

<7.2 366 Rancho Seco Nuclear Station F-6 2001 AREOR

TABLE F-4 (continued) 2001 SOIL AND SEDIMENT Effluent Creek Soil Semi-Annual (pCi/kg)

Sample ID Description Collection Date Mn-54 Co-60 Zn-65 Cs-134 Cs-137 RSLO.5MPAK Site Boundary 5/1/2001 <19

<21

<42

<16 459 RSLO.5MPAK Site Boundary 10/18/2001 <15

<15

<30.1<13 351 RSLO.5MPAL Site Boundary 10/18/2001 <12

<9

<21

<9 273 RSLO.5MPAL Site Boundary 5/1/2001 <14

<15

<28

<12 322 RSLO.5MPAM Site Boundary 10/18/2001 <12 179

<30

<13 3949 RSLO.5MPAM Site Boundary 5/1/2001 <20 488

<43

<22 7600 RSLO.5MPAN Site Boundary 10/18/2001 <7

<8

<17

<6 34 RSLO.5MPAN Site Boundary 5/1/2001 <10

<8

<21

<9 259 RSLO.6MO Site Boundary 5/1/2001 <11 17

<25

<10 612 RSLO.6MO Site Boundary 11/1/2001 <8

<11

<19

<7 345 RSLO.7NO Water Sump 11/1/2001 <7

<9

<17

<7 92 RSLO.7NO Water Sump 5/1/2001 <15

<12

<33

<11 142 RSL1.5NO Silva Property 10/18/2001 <12

<15

<24

<10 422 RSL1.5NO Silva Property 5/1/2001 <17

<15

<34

<14 738 RSL1.8N0 Hadselville/ Clay Creeks 10/18/2001 <12

<14

<38

<10 145 RSL1.8NO Hadselville/ Clay Creeks 5/1/2001 <13

<15

<28

<13

<13 Rancho Seco Nuclear Station F-7 2001 AREOR

TABLE F-4 (continued) 2001 SOIL AND SEDIMENT Site Boundary Soil/ Depression Areas Soil Semi-Annual (pCi/kg)

Sample ID Description Collection Date Mn-54 Co-60 Zn-65 Cs-134 Cs-137 RSLO.5MPAK Site Boundary 5/1/2001

<19

<21

<42

<16 459 RSL0.5MPAK Site Boundary 10/18/2001

<15

<30

<13 351 RSLO.5MPAL Site Boundary 10/18/2001

<12

<9

<21

<9 273 RSLO.5MPAL Site Boundary 5/1/2001

<14

<15

<28

<12 322 RSLO.5MPAM Site Boundary 10/18/2001

<12 179

<30

<13 3949 RSLO.5MPAM Site Boundary 5/1/2001

<20 488

<43

<22 7600 RSLO.5MPAN Site Boundary 5/1/2001

<10

<8

<21

<9 259 RSLO.5MPAN Site Boundary 10/18/2001

<7

<8

<17

<6 34 RSL0.4MP1 Depression 10/18/2001

<20 856

<47

<33 32190 RSLO.4MP1 Depression 5/1/2001

<22 959

<53

<40 31600 RSLO.4MP2 Depression 5/1/2001

<14 336

<34

<23 14100 RSLO.4MP2 Depression 10/18/2001

<13 257

<27

<20 12930 RSLO.4MP3 Depression 10/18/2001

<11

<16

<26

<14 5145 RSLO.4MP3 Depression 5/1/2001

<12 70

<23

<21 11700 Rancho Seco Nuclear Station F-8 2001 AREOR

TABLE F-4 (continued) 2001 SOIL AND SEDIMENT Storm Drain Soil Semi-Annual (pCi/kg)

Sample ID Description Collection Date Mn-54 Co-60 Zn-65 Cs-134 Cs-137 RSLO.3NP1 ISFSI #1 5/1/2001

<13

<12

<27

<9 34 RSL0.3NP1 ISFSI #1 11/5/2001

<10

<11

<24

<8

<10 RSLO.3NP2 ISFSI #2 11/5/2001

<11

<9

<25

<8

<12 RSLO.3NP2 ISFSI #2 5/1/2001

<11

<10

<26

'<8 52 RSLO.3NP3 ISFSI #3 5/1/2001

<12

<10

<22

<9

<10 RSLO.3NP3 ISFSI #3 11/5/2001

<10

<9

<25

<8 36 RSL0.2H01 Storm Drain #1 5/1/2001

<8

<7

<18

<7 48 RSL0.2H01 Storm Drain #1 11/1/2001

<9

<8

<17

<7 18 RSLO.2HO2 Storm Drain #2 11/1/2001

<11

<9

<22

<8

<11 RSLO.2HO2 Storm Drain #2 5/1/2001

<18 134

<39

<14 182 RSLO.2J0 Storm Drain #3 5/1/2001

<9

<11

<25

<9 21 RSLO.2JO Storm Drain #3 11/1/2001

<11 65

<25

<10 156 RSLO.2KO Storm Drain #4 5/1/2001

<9

<21

<7 20 RSLO.2KO Storm Drain #4 11/1/2001

<11

<10

<21

<8

<12 RSLO.3LO Storm Drain #5 5/1/2001

<10

<26

<9 57 RSLO.3LO Storm Drain #5 11/1/2001

<8

<9

<20

<7 34 RSLO.2HO Storm Drain #6 5/1/2001 11

<9

<24

<8 60 RSLO.2HO Storm Drain #6 11/1/2001

<10

<26

<9 41 RSLO.3MO7 Storm Drain #7 5/1/2001

<9

<11

<24

<7 21 RSLO.3MO7 Storm Drain #7 11/1/2001

<8

<9

<18

<6 30 RSL0.3M08 Storm Drain #8 11/1/2001

<9

<7

<19

<7 35 RSLO.3MO8 Storm Drain #8 5/1/2001

<13

<30

<11 60 RSL0.3M09 Storm Drain #9 10/18/2001

<4

<8

<19

<8 28 RSL0.3M09 Storm Drain #9 5/1/2001

<12

<11

<24

<9 47 RSLO.3AO Storm Drain #10 10/18/2001

<7

<8

<20

<7 65 RSLO.3AO Storm Drain #10 5/1/2001

<7

<8

<24

<8 70 RSLO.3Q0 Storm Drain #11 10/18/2001

<9

<24

<8

<11 RSLO.3QO Storm Drain #11 5/1/2001

<9

<11

<26

<7

<12 RSLO.3NO Storm Drain #12 5/1/2001

<10

<22

<8

<11 RSLO.3NO Storm Drain #12 10/18/2001

<8

<9

<20

<7

<9 Rancho Seco Nuclear Station 2001 AREOR F-9

TABLE F-5 2001 FISH Semi-Annual (pCi/kg, wet)

Sample ID Collection Date Mn-54 Co-60 Zn-65 Cs-134 Cs-137 RFSO.6MO(1) 5/10/2001

<14

<17

<57

<15 56.8 RFSO.6MO(1) 11/15/2001

<4.8

<5.8

<14

<5.8 21.3 Note: (1)=Predator Species TABLE F-6 2001 ALGAE Semi-annual (pCi/kg, wet)

Sample ID Collection date Mn-54 Co-60 Zn-65 Cs-134 Cs-137 RAG1.3FO 5/22/2001

<5.4

<5.6

<11

<6.9

<5.9 RAGO.3MO 5/22/2001

<11

<13

<24

<14 38.3 RAG1.8NO 5/22/2001

<9.0

<11

<20

<12 17.7 RAGO.6MO 5/22/2001

<21

<25

<49

<26 57.0 RAGO.7N0 5/22/2001

<13

<22

<29

<17

<17 RAG1.3FO 8/28/2001

<7.3

<7.7

<17

<15

<7.9 RAGO.3MO 8/28/2001

<7.9

<11

<20

<9.3

<9.0 RAG1.8NO 8/28/2001

<5.9

<9.4

<14

<6.8 14.8 RAGO.6MO 8/28/2001

<6.9

<7.8

<17

<8.0 9.32 RAGO.7NO 8/28/2001

<7.8

<7.2

<16

<9.2

<7.6 RAGO.7NOQ 8/28/2001

<2.8

<3.3

<7.1

<3.7 10.1 RAG3.7NO 8/28/2001

<8.1

<9.4

<19

<10 17 Rancho Seco Nuclear Station F-10 2001 AREOR

TABLE F-7 2001 WELL WATER Quarterly Sample ID Collection Date Gross Tritium Mn-54 Co-60 Zn-65 Cs-134 Cs-137 Beta II RWWO.8LO 2/26/2001

<3.6

<200

<9.4

<10

<20

<11

<9.6 RWW0.8DO 2/26/2001 2.87

<190

<5.9

<6.4

<13

<7.2

<6.2 RWWO.9CP 2/26/2001 2.70

<190

<6.6

<7.4

<17

<8.5

<12 RWWO.7RP 2/26/2001 2.24

<200

<5.6

<5.7

<12

<7.6

<5.7 RWWO.6RP 2/26/2001 6.82

<190

<6.8

<7.5

<18

<16

<7.5 RWW3.7MO 2/26/2001 2.36

<190

<5.8

<5.9

<12

<5.8 RWW2.1MO 2/26/2001

<2.7

<200

<6.0

<7.0

<13

,<7.2

<6.2 RWW1.5MP 2/26/2001

<2.2

<210

<5.6

<6.0

<12

<6.6

<5.3 RWWO.3EO 2/26/2001

<3.6

<190

<9.7

<11

<19

<11

<9.8 RWWO.3EO 5/29/2001 2.05

<200

<4.8

<10

<9.9

<5.3 RWWO.8L0 5/29/2001

<2.2

<200

<8.1

<9.3

<18

<15

<9.2 RWW2.1 MO 5/29/2001

<2.3

<210

<8.3

<9.9

<20

<9.8

<8.0 RWW3.7MO 5/29/2001

<2.0

<200

<7.6

<8.0

<15

<8.1

<7.3 RWWO.6RP 5/29/2001 2.40

<200

<7.6

<10

<19

<10

<8.8 RWWO.7RP 5/29/2001 3.85

<200

<4.9

<5.3

<10

<5.3

<4.1 RWWO.9CP 5/29/2001

<2.7

<210

<4.6

<4.8

<9.8

<7.6

<10 RWW1.5MP 5/29/2001

<2.5

<200

<9.0

<11

<22

<11

<8.7 RWWO.8DO 5/29/2001

<3.0

<200

<8.2

<10

<21

<11

<9.3 RWWO.8DO 8/28/2001 2.40

<230

<5.3

<8.1

<11

<7.2

<6.3 RWWO.3EO 8/28/2001 2.81

<230

<4.5

<4.9

<9.2

<5.7

<4.3 RWWO.9CP 8/28/2001

<2.1

<230

<7.4

<7.6

<15

<8.0

<7.5 RWWO.7RP 8/28/2001 3.84

<230

<7.6

<12

<18

<9.8

<8.4 RWWO.6RP 8/28/2001 3.54

<230

<6.6

<7.4

<13

<6.7

<6.1 RWW3.7MO 8/28/2001

<2.9

<230

<7.8

<8.7

<18

<10

<8.5 RWW2.1MO 8/28/2001

<2.2

<230

<5.8

<8.5

<12

<6.3 RWWO.8LO 8/28/2001 4.08

<230

<4.8

<7.4

<9.9

<6.9

<5.5 RWW1.5MP 8/28/2001

<1.9

<230

<7.7

<9.2

<18

<10

<8.7 RWW3.7MO 11/28/2001

<200 RWW1.5MP 11/28/2001

<200 RWWO.8LO 11/28/2001

<200 RWWO.8DO 11/28/2001

<200 RWWO.6RP 12/4/2001 4.36

<190

<10

<20

<12

<10 RWWO.9CP 12/4/2001 2.38

<200

<8.1

<9.1

<17

<10

<8.2 RWWO.8LO 12/4/2001 8.68

<200

<6.7

<7.2

<16

<8.6

<7.2 RWW2.1MO 12/4/2001

<2.5

<200

<6.6

<7.0

<15

<7.0

<6.6 RWW3.7MO 12/4/2001 2.30

<190

<4.2

<4.5

<8.5

<5.2

<4.0 RWWO.8DO 12/4/2001

<1.8

<190

<9.3

<9.9

<18

<11

<8.9 RWW1.5MP 12/4/2001

<2.7

<190

<3.6

<4.3

<8.2

<4.6

<3.5 RWWO.3EO 12/4/2001 3.75

<190

<7.4

<8.7

<18

<9.2

<7.0 Rancho Seco Nuclear Station F-1 1 2001 AREOR

TABLE F-8 2001 RUNOFF WATER Biweekly (pCi/L)

Sample ID Collection Date Tritium Mn-54 Co-60 Zn-65 Cs-134 Cs-137 RRWO.6MO 1/8/2001

<170

<6.0

<6.3

<13

<8.1

<6.2 RRWO.6MO 1/23/2001

<200

<8.5

<9.2

<19

<11

<9.4 RRWO.6MO 2/5/2001

<170

<3.5

<3.8

<8.1

<4.4

<3.6 RRWO.6MO 2/20/2001

<200

<7.3

<7.7

<18

<9.4

<8.3 RRW0.6MOQ 2/20/2001

<200

<6.7

<7.6

<16

<8.7

<7.3 RRWO.6MO 3/6/2001

<200

<6.2

<6.6

<13

<6.6

<6.5 RRWO.6MO 3/20/2001

<190

<7.8

<9.2

<19

<11

<9.3 RRWO.6MO 4/2/2001

<200

<5.7

<5.9

<12

<9.1

<6.5 RRWO.6MO 4/16/2001

<190

<4.8

<4.9

<9.7

<12

<5.6 RRWO.6MO 4/30/2001

<190

<7.1

<8.4

<17

<9.6

<8.4 RRWO.6MO 5/15/2001

<200

<7.5

<8.9

<19

<10

<8.3 RRWO.6MOQ 5/15/2001

<200

<4.0

<4.5

<8.3

<4.8

<3.9 RRWO.6MO 5/30/2001 793

<10

<20

<11

<8.9 RRWO.6MO 6/11/2001

<210

<6.9

<7.3

<16

<7.6

<6.9 RRWO.6MO 6/25/2001

<210

<8.1

<9.3

<17

<10

<8.7 RRWO.6MO 12/18/2001 6260

<7.7

<7.8

<17

<9.9

<7.8 RRWO.6MO 12/26/2001

<190

<7.4

<16

<8.3

<7.6 Rancho Seco Nuclear Station F-1 2 2001 AREOR

TABLE F-8 2001 RUNOFF WATER (continued)

Biweekly (pCi/L)

Sample ID Collection Date Tritium Mn-54 Co-60 Zn-65 Cs-134 Cs-137 RRWO.6MO 7/9/2001

<220

<4.4

<5.2

<8.9

<5.3

<4.0 RRWO.6MO 7/23/2001

<200

<7.0

<8.6

<17

<9.6

<8.4 RRWO.6MO 8/7/2001

<180

<7.3

<8.3

<19

<9.6

<9.2 RRWO.6MOQ 8/7/2001

<180

<5.1

<5.8

<12

<7.4

<13 RRWO.6MO 8/21/2001

<240

<7.1

<8.7

<16

<9.3

<8.3 RRWO.6MO 9/4/2001

<210

<8.1

<9.7

<19

<8.8

<7.3 RRWO.6MO 9/10/2001

<190

<5.7

<6.5

<14

<6.8

<6.4 RRWO.6MO 9/25/2001

<200

<6.7

<13

<16

<8.6

<7.0 RRWO.6MO 10/8/2001

<200

<8.8

<12

<19

<11

<8.3 RRWO.6MO 10/23/2001 3600

<8.0

<11

<21

<11

<8.7 RRWO.6MOQ 11/6/2001

<200

<3.5

<4.0

<7.6

<5.8

<4.1 RRWO.6MO 11/6/2001

<210

<8.9

<11

<18

<11

<9.1 RRWO.6MO 11/20/2001

<200

<7.9

<8.3

<18

<8.8

<8.0 RRWO.6MO 12/4/2001

<200

<7.3

<7.4

<17

<8.2

<7.2 Rancho Seco Nuclear Station F-1 3 2001 AREOR

TABLE F-9 2001 SURFACE WATER Monthly Grab / Monthly Composite (pCi/L)

Sample ID Collection Date Tritium Mn-54 Co-60 Zn-65 Cs-134 Cs-137 RSW1.8NOQ 1/23/2001

<200

<6.7

<6.8

<15

<8.0

<6.9 RSW1.3FO 1/23/2001

<200

<5.1

<5.2

<11

<7.0

<5.2 RSWO.7NO 1/23/2001

<200

<8.3

<10

<17

<10,

<8.0 RSW0.3MO 1/23/2001

<200

<5.4

<9.5

<11

<7.0

<5.6 RSW3.7NO 1/23/2001

<200

<5.0

<5.1

<11

<6.4

<5.4 RSW1.8NO 1/23/2001

<200

<5.5

<6.3

<12

<6.3

<5.4 RSW1.8NO 2/26/2001

<220

<6.5

<6.7

<13

<11

<6.6 RSW3.7NO 2/26/2001

<210

<8.0

<9.0

<21

<11

<8.8 RSW1.3FO 2/26/2001

<200

<6.4

<6.6

<14

<15

<14 RSWO.7NO 2/26/2001

<230

<9.5

<11

<21

<11

<9.2 RSWO.3MO 2/26/2001

<210

<4.2

<4.7

<9.6

<5.5

<4.2 RSWO.3MO 3/27/2001

<160

<7.2

<8.6

<17

<16

<15 RSWO.7NO 3/27/2001

<160

<3.6

<4.6

<8.1

<5.2

<4.6 RSW1.8NO 3/27/2001

<160

<7.0

<8.4

<16

<8.2 RSW1.3FO 3/27/2001

<160

<8.5

<10

<19

<10

<9.0 RSW3.7NO 3/27/2001

<160

<5.3

<5.5

<11

<9.9

<6.0 RSWO.7N0 4/30/2001

<190

<5.0

<9.5

<11

<7.2

<5.7 RSW1.3FO 4/30/2001

<200 RSW1.8NOQ 4/30/2001

<200

<4.1

<4.8

<8.7

<5.8

<4.4 RSW3.7NO 4/30/2001

<190

<7.2

<8.2

<12

<7.6

<6.8 RSWO.3MO 4/30/2001

<200

<6.5

<4.6

<8.3

<5.3

<4.5 RSW1.8NO 4/30/2001

<200

<6.1

<13

<8.3

<6,8 RSW1.3FO 4/30/2001

<200

<5.7

<6.4

<12

<6.9

<5.9 Rancho Seco Nuclear Station 2001 AREOR F-1 4

TABLE F-9 (continued) 2001 SURFACE WATER Monthly Grab/ Monthly Composite

. (pCi/L)

Sample ID Collection Date Tritium Mn-54 Co-60 Zn-65 Cs-134 Cs-137 RSWO.3MO 5/29/2001 295

<6.0

<4.9

<8.9

<5.2

<4.3 RSWO.7NO 5/29/2001

<170

<6.4

<6.3

<14

<6.9

<6.4 RSW1.8NO 5/29/2001

<160

<4.4

<7.4

<9.7

<6.4

<5.3 RSW1.3FO 5/29/2001

<150

<4.2

<4.3

<8.8

<6.7

<4.7 RSW3.7NO 5/29/2001

<160

<9.3

<10

<20

<10

<9.5 RSW3.7NO (reanalyze) 6/25/2001 345 RSW3.7NO (new analysis) 6/25/2001 252 RSWO.3MO 6/25/2001 210

<4.6

<5.0

<9.5

<5.2

<4.3 RSW3.7NO (original) 6/25/2001 412

<7.8

<8.9

<17

<10

<9.1 RSW1.3FO 6/25/2001

<200

<4.7

<5.2

<11

<6.6

<5.4 RSWO.7NO 6/25/2001

<200

<5.1

<5.5

<12

<7.1

<5.9 RSW3.7NO (State) 6/25/2001

<282 RSW1.8NO 6/25/2001

<210

<4.2

<4.8

<8.6

<4.8

<4.2 RSWO.3MO 7/31/2001

<220

<8.8

<12

<19

<11

<8.0 RSWO.7NO 7/31/2001

<210

<4.5

<8.7

<5.6

<4.2 RSW1.8NO 7/31/2001

<210

<5.1

<5.5

<11

<7.0

<5.9 RSW3.7NO 7/31/2001

<220

<6.4

<8.3

<15

<8.3

<7.1 RSW1.8NOQ 7/31/2001

<210

<9.7

<10

<21

<12

<10 RSW1.3FO 7/31/2001

<210

<7.3

<8.6

<17

<9.7

<8.3 RSWO.7NO 8/28/2001 412

<9.4

<9.1

<19

<12

<11 RSW1.8NO 8/28/2001

<220

<7.3

<8.8

<17

<8.5

<7.5 RSWO.3MO 8/28/2001

<220

<9.0

<11

<21

<11

<9.7 RSW1.3FO 8/28/2001

<230

<4.4

<4.7

<9.5

<6.1

<4.5 RSW3.7NO 8/28/2001

<230

<9.2

<9.3

<17

<10

<8.1 Rancho Seco Nuclear Station IF-1 5 2001 AREOR

TABLE F-9 (continued) 2001 SURFACE WATER Monthly Grab/ Monthly Composite (pCi/L)

Sample ID Collection Date Tritium Mn-54 Co-60 Zn-65 Cs-134 Cs-137 RSWO.3MO 9/25/2001

<200

<4.4

<4.8

<9.7

<5.6

<4.0 RSWO.7NO 9/25/2001

<210

<8.7

<9.1

<18

<9.9

<8.2 RSW1.8NO 9/25/2001

<210

<7.2

<7.9

<17

<8.4'

<7.0 RSW3.7NO 9/25/2001

<210

<7.0

<7.1

<14

<8.1

<6.8 RSWO.7NO 10/30/2001 263

<5.8

<6.4

<13

<12

<6.7 RSWO.3MO 10/30/2001 199

<5.5

<6.3

<13

<6.7

<6.4 RSW1.8NOQ 10/30/2001

<170

<6.6

<7.8

<14

<8.4

<6.8 RSW1.3FO 10/30/2001

<160

<3.4

<3.7

<6.2

<4.2

<3.3 RSW3.7NO 10/30/2001

<160

<9.7

<13

<24

<12

<11 RSW1.8NO 10/30/2001

<170

<6.8

<8.0

<16

<7.1

<7.1 RSWO.3MO 11/28/2001

<200

<8.3

<8.5

<21

<11

<8.7 RSWO.7NO 12/4/2001

<170

<7.3

<7.7

<16

<7.5

<6.9 RSW1.8NO 12/4/2001

<170

<9.0

<11

<21

<10

<8.4 RSW1.3FO 12/4/2001

<170

<8.1

<8.6

<18

<11

<8.0 RSWO.7NO 12/26/2001

<200

<6.6

<6.8

<13

<7.5

<7.0 RSWO.3MO 12/26/2001

<190

<8.2

<8.3

<17

<9.6

<8.1 RSW1.8NO 12/26/2001

<190

<8.8

<9.8

<18

<11

<9.5 RSW1.3FO 12/26/2001

<190

<3.8

<4.3

<8.2

<4.4

<3.4 RSW3.7NO 12/26/2001

<190

<6.7

<7.0

<15

<8.5

<7.1 Rancho Seco Nuclear Station F-1 6 2001 AREOR

TABLE F-10 2001 Drinking Water Monthly (pCi/L)

Sample ID Collection Date Gross Beta Tritium Mn-54 Co-60 Zn-65j Cs-134 Cs-137 RDW1.8FP 1/23/2001

<2.7

<200

<6.5

<7.0

<13

<8.0

<6.5 RDWO.1GO 1/23/2001 3.04

<200

<3.8

<4.1

<7.4

<4.6

<4.1 RDW1.8FP 2/26/2001 3.25

<200

<6.2

<5.8

<13

<8.6

<6.8 RDWO.1GO 2/26/2001 4.42

<200

<6.8

<7.2

<15

<8.2

<7.1 RDW1.8FP 3/27/2001

<2.8

<200

<3.9

<4.6

<7.9

<4.7

<4.4 RDW0.1GO 3/27/2001

<2.9

<200

<6.7

<7.9

<14

<8.2

<7.2 RDW1.8FP 4/30/2001 4.11

<210

<9.7

<11

<20

<10

<9.2 RDWO.1GO 4/30/2001

<217

<200

<5.5

<6.8

<12

<6.7

<5.8 RDW1.8FP 5/29/2001

<2.5

<160

<4.6

<9.7

<6.4

<4.8 RDWO.1 GO 5/29/2001 2.5

<160

<7.0

<8.3

<16

<8.8

<7.1 RDW1.8FP 6/25/2001 3.41

<200

<6.3

<7.3

<16

<8.4

<7.4 RDWO.1 GO 6/25/2001

<2.4

<200

<5.3

<5.6

<11

<8.8

<5.9 RDWO.1GO 7/31/2001

<2.7

<210

<6.8

<6.9

<15

<8.0

<7.4 RDW1.8FP 7/31/2001

<3.6

<210

<9.1

<11

<20

<11

<8.5 RDWO.1GO 8/28/2001 3.55

<220

<8.6

<10

<22

<11

<9.5 RDW1.8FP 8/28/2001 3.27

<220

<7.3

<11

<15

<8.2

<7.3 RDWO.1GO 9/25/2001 3.12

<230

<7.4

<7.9

<17

<8.6

<7.6 RDW1.8FP 9/25/2001 2.29

<230

<6.2

<6.9

<13

<7.2

<6.3 RDW1.8FP 10/25/2001 2.53

<210

<8.0

<10

<20

<11

<8.5 RDWO.1GO 10/25/2001 3.93

<210

<9.3

<10

<20

<12

<11 RDW1.8FP 12/4/2001 3.37

<170

<4.4

<4.3

<9.6

<5.2

<4.1 RDWO.1 GO 12/4/2001 2.65

<170

<8.9

<20

<11

<8.7 RDWO.1GO 12/26/2001 3.44

<190

<5.2

<5.0

<9.5

<5.6

<4.5 RDW1.8FP 12/26/2001 3.78

<190

<7.2

<7.0

<16

<9.9

<7.3 Rancho Seco Nuclear Station 2001 AREOR F-1 7

TABLE F-11 2001 Rain Water Seasonal (pCi/L)

Sample ID Collection Date Tritium Mn-54 Co-60 Zn-65 Cs-134 Cs-137 RRNO.8DO 1/8/2001

<160

<8.2

<8.4

<19

<11

<8.8 RRNO.8D0 1/23/2001

<200

<3.0

<3.7

<6.1

<4.0

<3.1 RRNO.8DO 2/6/2001

<170

<5.0

<5.5

<11

<6.9

<5.5 RRN0.8DO 2/20/2001

<200

<6.2

<13

<18

<6.7 RRNO.8DO 3/13/2001

<210

<7.2

<8.0

<17

<9.8

<8.3 RRN0.8DO 3/27/2001

<160

<6.4

<7.4

<16

<12

<7.3 RRNO.8DO 4/10/2001

<200

<4.1

<4.8

<9.1

<5.6

<3.9 RRNO.8DO 4/23/2001

<190

<5.2

<6.0

<11

<6.4

<5.7 RRNO.8DO 7/3/2001

<220

<3.8

<4.2

<7.9

<4.8

<3.5 RRNO.8D0 9/26/2001

<200

<7.5

<8.3

<18

<13

<8.4 RRNO.8D0 10/30/2001

<160

<6.9

<9.4

<18

<8.2

<7.4 RRNO.8DO 11/14/2001

<200

<9.0

<12

<22

<9.5

<8.0 RRNO.8DO 12/4/2001

<190

<4.3

<5.0

<9.7

<5.7

<4.1 RRNO.8DO 12/26/2001

<190

<8.9

<10

<21

<11

<10 RRNO.8DO 1/8/2002

<200

<5.3

<6.8

<13

<7.2

<6.5 RRNO.8DO 1/29/2002

<180

<8.2

<10

<18

<9.5

<8.2 Rancho Seco Nuclear Station F-1 8 2001 AREOR

APPENDIX G 2001 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 during 2001. Corrective action as required by the REMP manual is as indicated.

Luxel (Direct radiation pathway)

Location # 18 RTL7.8CO, Sam Jaber Residence (control) -- On July 3, 2001, the monitoring badges at this location were missing during the routine changeout. Third Quarter 2001 monitoring badges were restored at this location. No data will be available for this location for~the second quarter 2001.

Location # 17 RTL8.2KO, Elliott Cemetary (control) -- On January 3, 2002, the monitoring badges at this location were missing during the routine change-out. First Quarter 2002 monitoring badges were restored at this location. No data will be available for this location for the fourth quarter 2001.

Location # 31 RTL3.7NO, Folsom South Canal (Indicator) -- On January 3, 2002, the monitoring badges at this location were missing during the routine change-out. First Quarter 2002 monitoring badges were restored at this location. No data will be available for this location for the fourth quarter 2001.

Surface Water (Waterborne Pathway)

RSW3.7NO, Folsom South Canal (control) - On November 29, 2001, the composite water sampler at this location did not collect a monthly composite sample. The sampler was replaced and the failed sampler was tested. No problems were found with the failed sampler. No sample data will be available from this location for the month of November 2001. PDQ 01-0138 was written to document this missed sample.

Algae (Waterborne Pathway)

Routine sampling of algae on May 22,2001 did not collect samples from RAG2.2NO andRAG3.7NO due to no samples being available due to excessive flow.

Air Sampler (Airborne Pathway)

RASO.3MO, Plant Effluent (indicator) - On February 26, 2001, during the weekly change-out, the air sampler at this location was found not running. The power control was found in the "off' position. The sampler was not started during the previous change-out. The sampler was started and the surveillance procedure was revised to leave the air samplers "on" during change-out. No sample date will be available for this location for the week of February 20, 2001 to February 26, 2001. PDQ 01-0020 was written to document the air sampler did not meet the continuous sampling requirement.

Rancho Seco Nuclear Station G-1 2001 AREOR.

APPENDIX G 2001 MISSED SAMPLE REPORT (Continued)

RASO.7EO, Meteorological Tower (control) - On July 16, 2001, during the weekly change-out, the air sampler at this location was found not running. The power cord for the air sampler was damaged, possible by animal damage (chewing) to the cord. The power cord was replaced and the air sampler was restarted. PDQ 01-0081 was written to document the air sampler did not meet the continuous sampling requirement RASO.1 CO, PAP/ Security Building (indicator), RASO.3MO, Plant Effluent (indicator)

RASO.7EO, Meteorological Tower (control), RASI.8FP Rancho Seco Reservoir (control)

Air filter samples were collected from all four locations on July 16, 2001. SP.841 was completed and the samples were shipped by UPS on July 16, 2001. The samples were picked up by UPS on July 16, 2001. The only REMP samples shipped was the air filters in a manila envelope. The sample shipment reached the UPS North Bay Hub, where the shipment was misplaced. The shipment was never found after UPS was contacted to trace the shipment. No data will be reported for this sampling period from all four locations.

Air Sampler (Airborne Pathway)/ Surface Water (Waterborne Pathway)/ Drinking Water (Waterborne Pathway)/ Well Water (Waterborne Pathway/ Rain Water (Waterborne Pathway On November 29, 2001, samples were collected for the weekly Air Filter, monthly Surface water and Drinking Water, Quarterly Well Water, and seasonal Rain Water. The samples were shipped by UPS. When the sample container arrived at Eberline Services, twenty eight (28) of the samples were missing. UPS was contacted and they reported that according to their records, no discrepancies were noted regarding this shipment. Samples from the drinking water, surface water grab samples, and well water were collected to replace the lost samples. The following samples were missing and no data will be reported for these locations for the indicated sample period:

1. Air Filter-RASO.1CO/RASO.3M0/RASO.7E0/RASI.8FP Week of 11/20/01 to 11/27/01

2. Rain Water-RRNO.8DO Seasonal sample collected on 11/28/01. No sample available for collection on 12/4/01.

3. Drinking Water-RDW1.8FP/ RDWO.1GO Monthly Sample for November 2001-Re-sampled on 12/4/01

4. Surface Water-RSWO.7NO/ RSW1.3FO/ RSW1.8NO Monthly sample for November 2001-Re-sampled on 12/4/01, the composite sample from RSWO.3MO was received in the original shipment. RSW3.7NO was not sampled due to failure of the sampler, see above.

Rancho Seco Nuclear Station 2001 AREOR G-2

APPENDIX G 2001 MISSED SAMPLE REPORT (Continued

5. Well Water-RWWO.8DO/ RWWO.9CP/ RWW0.6RPI RWW3.7MO/ RWW2.1 MO/

RWW1.5MPI RWWO.8LO/ RWWO.3EO Fourth Quarter 2001 sample. Tritium samples from locations RWWO.8DO, RWW3.7NO, RWW1.5MP, and RWWO.8L0 were received in the original shipment and were analyzed. All locations were re-sampled on 12/4/01 and analyzed.

Rancho Seco Nuclear Station G-3 2001 AREOR

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