Text

Annual Radiological Environ Operating Rept,Jan-Dec 1992
	ML20044E248
Person / Time
Site:	Rancho Seco
Issue date:	12/31/1992
From:	; SACRAMENTO MUNICIPAL UTILITY DISTRICT
To:	;
Shared Package
ML20044E244	List: ML20044E243; ML20044E248;
References
	NUDOCS 9305240102
	Download: ML20044E248 (95)
	v • d • e

._..

ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT l

l i

JANUARY - DECEMBER 1992 i

^~.

~

i c.

.c. -r,..

I

.-s t

4,o

%.[7 i

t 4 :-

l i

4 i

g-a

,l

.c

~ !

f*

i

.ie i

F 1

, gr.J l

qi r--a j

l

~

l i

l l

1 Rancho Seco Nuclear Station

)

Herald, California License Number DPR-54 i

i j

9305240102 930514 DR ADDCK 0500 2

4 2

j 1992 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT TABLE OF CONTENTS Section Title Pace TABLE OF CONTENTS i

LIST OF FIGURES

'ii LIST OF TABLES iii i

I.

EXECUTIVE

SUMMARY

1 II.

LAND USE CENSUS 2

?

III.

RADIOLOGICAL IMPACT EVALUATION 2

[

Predicted Potential Radiological Impact 2

Fuel Cycle Dose Evaluation 3

l i

Observed Potential Radiological Impact 4

IV.

PROGRAM ANALYSIS RESULTS

SUMMARY

7 A

Atmospheric Monitoring.

7 B

Direct Radiation Monitoring 8

C Terrestrial Monitoring 8

D Aquatic Life Monitoring 9

l E

Water Monitoring 10 V.

REFERENCES 19 7

VI.

APPENDICES 21 A

1992 Land Use Census A-1 B

Sample Site Descriptions and Maps B-1 C

Quality Control Sample Analysis Results C-1 D

Sample Collection and Analysis Methods D-1 l

E Environmental Monitoring Program Design E-1 F

Sample Analysis Raw Data Tables F-1 G

Missed Sample Report G-1 7

Rancho Seco i

1992 AREOR i

.., ~.. -

. _ ~. -

LIST OF FIGURES Ficure Title Pace l

1 B-1 Radiological Environmental Monitoring Sites l

- Site Locations (Storm Drain Locations)

B-3 j

B-2 Radiological Environmental Monitoring Sites

- 1 Mile Radius Map B-4 l

B-3 Radiological Environmental Monitoring Sites i

- 5 Mile Radius Map B-5 i

t i

B-4 Radiological Environmental Monitoring Sites j

- 25 Mile Radius Map B-6 l

i l

i I

t h

i l

l i

i i

Rancho Seco ii-1992 AREOR i

l d

LIST OF TABLES Table Title Pace 1

1992 Liquid Effluent Pathway Potential Dose Comparison (maximally exposed group analysis) 5 2

1992 Liquid Effluent Pathway Potential i

Dose Comparison (similarly exposed group analysis) 6 3

1992 Sample Analysis Results Summary 12 B-1 Radiological Environmental Monitoring Sites B-7 C-1 EPA Interlaboratory Comparison Program

- Statistical Summary C-8 E-1 Reporting Levels for Radioactivity Concentrations f

Found in Environmental Samples E-16 i

E-2 Maximum LLD Values for Environmental Samples E-17 I

F-1 1992 Annual Summary - Gross Beta Radioactivity in Air, Weekly Particulate F-2 F-2 1992 Annual Summary - Quarterly Exposure at TLD Locations F-4 i

F-3 1992 Annual Summary - Garden Vegetables F-6 F-4 1992 Annual Summary - Raw Milk F-7 F-5 1992 Annual Summary - Soil and Sediment F-12 F-6 1992 Annual Summary - Fish F-14 1

F-7 1992 Annual Summary - Algae F-15 j

F-8 1992 Annual Summary - Well Water F-16 l

F-9 1992 Annual Summary - Runoff Water F-17 i

F-10 1992 Annual Summary - Surface Water F-19 F-11 1992 Annual Summary - Drinking Water F-21 Rancho Seco lii 1992 AREOR

1992 ANNUAL RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT I.

EXECUTIVE

SUMMARY

This report contains results from the Radiological Environmental Monitoring Program (REMP) for the Rancho Seco Nuclear Station (RSNS) compiled for the period January 1, 1992 through December 31, 1992.

This program is conducted by the Radiction Protection e

Department at RSNS and is conducted in accordance with section D6.8.3.b of the RSNS Permanently Defueled Technical Specifications.

The results of the 1992 Radiological Environmental Monitoring Program showed that the operation of RSNS had no significant radiological impact on the environment.

On June 7,

1989, as mandated by public referendum, actions were taken to discontinue the operation of the Rancho Seco Nuclear Generating Station.

These actions included placing the Station in a cold shutdown condition and defueling the reactor which was completed in December 1989.

Current plans call for placing the Plant in a Custodial SAFSTOR condition and maintaining this status until the Spent Fuel is moved to an onsite dry storage facility.

The Proposed Decommissioning Plan is currently under review by the U.S. Nuclear Regulatory Commission and is expected to be approved in 1993.

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 and Station operations.

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 thermoluminescent dosimeters (TLDs).

Direct radiation measurements attributable to Station operations, based on control and indicator locations, were indistinguishable above background levels.

Isotopic identifications were consistent with known releases of radioactive material from the Station to the atmospheric and I

aquatic environments.

As expected, samples obtained from the aquatic environment of the Clay /

Hadselville/

Laguna Creeks contributed the majority of positive isotopic identifications.

Cobalt-60, Cesium-134, and Cesium-137 were the predominant nuclides identified in the aquatic environment.

Nuclides of Station origin were not detected in the gaseous effluent exposure pathways.

Rancho Seco 1

1992 AREOR

I.

EXECUTIVE SUKKARY(continued)

Due to the late submittal (late March 1993) of the final environmental sample data to Rancho Seco environmental monitoring personnel from the District's contract laboratory, the District was not able to include all the supplemental information it normally includes in the Appendices to the Rancho Seco Annual Radiological Environmental Operating Report (AREOR).

This AREOR includes supplemental information (Appendices C,D,F, and the Figures in Appendix B) not included in the 1992 AREOR that was submitted as an enclosure to District letter DAGM/NUC 93-099, dated April 30, 1992.

II.

LAND USE CENSUS The 1992 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.

The 1992 Land Use Census did not identify any changes in the use of the unrestricted areas that would require modification to the REMP for evaluating doses to individuals from principal pathways of exposure.

This evaluation and determination is in accordance with the requirements of 10CFR50, Appendix I, section IV.B.3.

III.

RADIOLOGICAL IMPACT EVALUATION PREDICTED POTENTIAL RADIOLOGICAL IMPACT Gaseous Effluent Exposure Pathways The maximum predicted potential annual organ dose commitment due to gaseous releases of tritium and particulate isotopes was 0.40 mrem (as calculated using Rancho Seco Offsite Dose Calculation Manual (ODCM)).

This predicted potential organ dose commitment was 2.7%

of the associated PDTS limit (10CFR50, Appendix I guideline).

Since no noble gas activity was released from RSNS during 1992, there is no predicted gamma or beta air dose calculation from the ODCM.

Therefore, the predicted air doses were within the applicable PDTS limits (10CFR50, Appendix I guidelines).

i l

Rancho Seco 2

1992 AREOR l

4 III.

RADIOLOGICAL IMPACT EVALUATION (continued)

PREDICTED POTENTIAL RADIOLOGICAL IMPACT Liauid Effluent Exoosure Pathways During 1992, 1.06 E+07 liters of waste water were released to the Clay Creek from the two onsite Retention Basins.

This volume of i

waste water was dispersed into 1.85 E+10 liters of dilution water.

The estimated error associated with determining these volumes was 5% and 10%, respectively.

The Liquid source term resulted in a predicted potential annual child total body dose commitment of 0.29 mrem and a predicted potential adult liver dose commitment of 0.32 mrem (as calculated using the ODCM).

These predicted potential dose commitments were i

9.6%

and 0.3%,

respectively, of the associated PDTS limits (10CFR50, Appendix I guidelines). The dose commitments reflect the age groups that could have received the highest annual dose commitment from the liquid source term.

I FUEL CYCLE DOSE EVALUATION i

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 i

real member of the public to 25 mrem to the total body or any i

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 1992 since no REMP measurement exceeded the established reporting levels.

Additionally, the Staticn effluent dosa predictions did not exceed twice the dose guidelines of 10CFR50, Appendix I [CFRc].

The i

station operated within the Appendix I guidelines envelope for radioactive effluents (a

condition supported by Program measurements);

therefore, determination of an actual dose l

commitment delivered to a real member of the public was not required.

i Rancho Seco 3

1992 AREOR

,.,_.m

III.

RADIOLOGICAL IMPACT EVALUATION (continued)

OBSERVED POTENTIAL RADIOLOGICAL IMPACT Gaseous Effluent Exposure Pathways Due to substantial atmospheric dispersion and deposition effects, it is not expected to be possible to correlate environmental sample (REMP) results with predictions made using the source terms determined from the gaseous effluent monitoring program (ODCM).

This expectation was realized during 1992 as none of the REMP gaseous effluent pathway gamma isotopic analysis results indicated the presence of nuclides of Station origin.

However, since the predicted effluent dose commitment calculations utilize conservative (default) parameters, it is anticipated that observed potential dose commitments determined using measured (gross beta) airborne particulate results would yield a dose commitment that is significantly less than the predicted potential organ dose commitment of approximately 0.40 mrem [RS92B].

Direct Radiation Exposure Pathway Based on thermoluminescent dosimeter (TLD) control and indicator locations measurement results obtained during 1992, the Station proper did not contribute an observable component to the recorded direct gamma radiation field.

This TLD data not only supports the Gaseous Effluent Exposure Pathway conclusions, but determines that the Plant has no direct radiation effect on the environment in the irrediate vicinity of the site.

Licuid Effluent Exoosure Pathways To evaluate more accurately the impact on the environment from the liquid effluent

pathway, dose commitment calculations were l

performed and compared with the annual dose commitment predictions reported in the July December 1992 Rancho seco Semiannual Radioactive Effluent Release Report [RS92B).

The observed results presented in Table 1 and Table 2 were obtained using the average, positive activity concentrations identified in fish (Appendix F, i

Table F-7),

default consumption quantities (ODCM) and nuclide-specific dose factors [NRC77].

The results obtained in these analysis compare favorably.

Considering the assumptions made in l

estimating observed potential doses noted below, it is evident that the Station's radioactive liquid effluents management program l

remained effective throughout 1992.

l i

l Rancho Seco 4

1992 AREOR l

i

III.

RADIOLOGICAL IMPACT EVALUATION (continued)

OBSERVED POTENTIAL RADIOLOGICAL IMPACT Licuid Effluent Exoosure Pathways The observed potential dose commitments listed in Table 1 and Table 2 are subject to uncertainty, principally due to the assumption that the predicted radioactivity was due to 1992 Station operations only and was not affected by radioactivity introduced into the environment prior to 1992.

A major portion of the activity identified by Program measurements in 1992 is attributable to historical releases documented in previous annual reports, as well l

as fallout.

Additionally, the observed dose commitment i

i calculations are based on conservative default consumption factors l

for fish.

The 1992 Land Use Census did not reveal any actual exposure

(

pathways other than the aquatic / fish pathway.

TABLE 1 1992 Liquid Effluent Pathway Potential Dose Comparison POTENTIAL DOSE COMMITMENT (based on the maximally exposed group)

Predicted Dose Commitment (a)

Observed Dose Commitment (b)

(mrem)

(mrem) 0.29 (child's total body) 0.34 (adult's total body) 0.32 (adult's liver) 0.52 (adult's liver)

Notes:

(a)

Estimated by the Offsite Dose Calculation Manual (ODCM)

(b)

Estimated by the REMP using Appendix F Table F-7 observed average positive values for fish samples i

Rancho Seco 5

1992 AREOR

l l

III.

RADIOLOGICAL IMPACT EVALUATION (continued)

OBSERVED POTENTIAL RADIOLOGICAL IMPACT t

Licuid Effluent Exoosure Pathways TABLE 2 1992 Liquid Effluent Pathway Potential Dose Comparison POTENTIAL DOSE COMMITMENT (based on similarly exposed groups) l l

l Predicted Dose Commitment (a)

Observed Dose Commitment (b)

(mrem)

(mrem) 0.29 (child's total body) 0.07 (child's total body) 0.32 (adult's liver) 0.52 (adult's liver)

Notes:

(a)

Estimated by the Offsite Dose Calculc. tion i

Manual (ODCM) i (b)

Estimated by the REMP using Appendix F Table F-7 observed average positive values for fish samples l

l l

l

?

s i

Rancho Seco 6

1992 AREOR i

6 4

?

IV.

PROGRAM ANALYSIS RESULTS

SUMMARY

This section compiles all Program data with corresponding i

evaluations.

Each of the following five subsections presents information about each of the principal environmental exposure pathways monitored by the Program:

Atmospheric (Section IV-A) f Direct Radiation (Section IV-B) f f

Terrestrial (Section IV-C)

Aquatic Life (Section IV-D)

Water (Section IV-E)

I Each of these sections contains a data evaluation subsection which encompass broad categories of information.

Table 3 is a comprehensive, all-media data summary presented in a i

format considered acceptable by the USNRC.

Information contained in Table 3 was derived from data presented in Appendix F.

l IV-A.

ATMOSPHERIC MONITORING i

DATA EVALUATION t

No radionuclides attributable to the operation of Rancho Seco were observed in gamma spectrometry analyses of the quarterly composites i

of the particulate filters.

No table is presented for this data

[

since all the data were reported as being below the associated i

minimum detectable activity for the nuclides of interest.

No radiciodine attributable to Rancho Seco operations was detected i

during the year.

The requirement for sampling for airborne radiciodine was removed with revision 5 of the REMP manual, effective 4/30/92.

All sample analysis results were at or below 8

the a priori LLD-equivalent value of 0.004 pCi/m.

The data statistics indicate that there was no measurable contribution to the airborne radioactivity inventory which could reasonably be attributable to Station operations.

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

l Rancho Seco 7

1992 AREOR

l l

IV-B.

DIRECT RADIATION MONITORING l

DATA EVALUATION l

A comparison review of all indicator and control TLD data acquired during 1992 showed that there was no observable direct radiation J

component due to Station operations (i.e., storage or utilization of licensed radioactive material within the restricted area l

(Industrial Area Boundary)).

The summary data for 1992 is presented in Table 3.

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

l

)

IV-C.

TERRESTRIAL MONITORING f

DATA EVALUATION i

19 routine garden vegetation samples were Garden Vegetation collected and analyzed for nuclides of interest during 1992. No fission or activation product nuclides were identified by gamma spectrometry analysis of garden vegetation samples.

l Milk - 179 routine milk samples were collected and analyzed for

{

nuclides of interest during 1992. No fission or activation product j

nuclides were identified by gamma spectrometry and radiochemical I-131 analysis of raw milk samples. Radiochemical I-131 analysis was discontinued for milk samples with revision 5 of the REMP manual, effective 4/30/92.

Soil (discharge canal) - 10 routine soil samples were collected and analyzed for nuclides of interest from the effluent discharge i

canal / downstream creeks during 1992.

Cs-137 (5 samples, 93 to 3484 pCi/kg, 1332 pCi/kg mean) and Co-60 (2 samples, 149 to 504 pCi/kg, 327 pCi/kg mean) were detected by the analyses.

The remaining nuclide identifications were - numerically below the required LLD-equivalent activity concentration.

The presence of the identified nuclides could be attributed to Station operations and Cs-137 fallout sources.

Rancho Seco 8

1992 AREOR

. = _. -

IV-C.

TERRESTRIAL MONITORING (continued)

DATA EVALUATION soil (storm drain outfall) - 24 soil samples were collected from 12 i

storm drain outfall locations during 1992.

These outfalls are located along the perimeter of the Industrial Area Boundary and receive site drainage flows.

Gamma spectrometry analysis of these samples revealed the presence of Cs-137 (7 samples, 51 to 154 l

pCi/kg, 103 pCi/kg mean). These levels are within the range of the

{

background Cs-137 activity levels detected in the vicinity of l

Rancho Seco.

The summary data for 1992 terrestrial monitoring is presented in Table 3.

Comprehensive data tables are given in the following l

Appendix F tables:

l F-3 (Garden Vegetables) l F-4 (Raw Milk) i F-5 (Soil and Sediment).

[

IV-D.

AQUATIC LIFE MONITORING I

I i

l t

i DATA EVALUATION l

Fish - 14 fish samples were collected during 1992 and analyzed for I

nuclides of interest by gamma spectrometry.

As expected, the 7

following nuclide was identified:

Cs-137 (3 samples, 81 to 264 pCi/kg, 171 pCi/kg mean).

f I

l The identification of Cesium nuclides in fish samples is attributed i

l mainly to permitted historical liquid effluent discharges.

Based

[

i upon calculated Cesium activity concentration ratios, and the fact that Cesium nuclides were not identified in effluent discharge l

canal or creek water samples, it appears that the observed Cesium l

l uptake in fish could ultimately be traced directly or indirectly to l

sediment sources.

The summary data for'1992 aquatic life consumption exposure pathway f

is presented in Table 3.

A comprehensive data table is given in the Appendix F, Table F-7.

l Rancho Seco 9

1992 AREOR i

IV-E.

WATER MONITORING

{

l DATA EVALUATION 16 samples of sediment were collected from the i

sediment Clay /Hadselville/ Laguna Creeks and control locations during 1992.

As expected, fission and activation product nuclides were detected j

by gamma spectrometry analysis in several of these samples:

Co-60 (3 samples, 43 to 200 pCi/kg, 99 pCi/kg mean), Cs-134 (3 samples, 15 to 37 pCi/kg, 27 pCi/kg mean), and Cs-137 (15 samples, 82 to i

1438 pCi/kg, 427 pCi/kg mean).

5 The presence of nuclides of interest in sediments is attributed to i

recent and historical permitted liquid effluent discharges with f

i some contribution from fallout sources.

Algae - Algae was sampled at 7 locations with a total of 12 samples being collected during 1992. The following nuclide was detected by r

gamma spectrometry analysis: Cs-137 (3 samples, 24 to 113 pCi/kg, j

61 pCi/kg mean).

The identification of nuclides of interest in the algae samples is l

attributed to permitted recent and historical liquid effluent discharges.

Additional contributions would be expected to have occurred from fallout sources and sediment desorption.

r r

Well Water - The analysis _of the 20 well water samples that were collected did not reveal detectable concentrations of nuclides of i

interest.

No nuclides of interest were detected in the control j

well water samples analyzed in 1992.

Runoff Water - No nuclides of interest were identified by gamma l

spectrometry or tritium analysis of the 50 samples collected in l

1992.

Surface Water - 5 locations were included in the surface water monitoring Program.

During 1992, 70 samples were collected and analyzed for nuclides of interest. No gamma-emitting nuclides were detected in any of the samples analyzed. Tritium was detected in two of the samples.

A grab sample taken on December 22,1992 indicated 7328 pCi/L and the monthly composite sample located at the Site Boundary indicated 6078 pCi/L.

This activity was attributed to a monitored release that occurred during the sample period.

Rancho Seco 10 1992 AREOR

l IV-E.

WATER MONITORING (continued) i DATA EVALUATION l

l Drinking Water - Water supplied from a local well is distributed in a potable water supply system for Station personnel consumption and use.

On a monthly frequency, a sample of this processed water was collected and analyzed for nuclides of interest, including Tritium and I-131(I-131 analysis was discontinued with_ revision 5 of the l

REMP manual, effective 4/30/92).

No nuclides of interest were found-to be present in the 12 samples collected in 1992.

The summary data for the water monitoring program is shown in Table 3.

Comprehensive data for all samples collected is given in-the following Appendix F Tables:

F-5 (Soil and Sediment)

F-7 (Algae)

F-8 (Well Water)

F-9 (Runoff Water)

F-10 (Surface Water)

F-11 (Drinking Water) l i

Rancho Seco 11 1992 AREOR

TABLE 3 l

l ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM

SUMMARY

l i

Name of Facility Rancho Seco Station Docket No. DPR-54 Location of Facility licra ld. CA.

Reporting Period Januarv - December 1992 l

All Indicatcr Locations l

Location with Highest Annual Mean l

Control locations Medium or Lower !

(Positive Values Only) l (Positive Values only) l (Positive Values Only)

Ntedar of Pzthway Totat Limit ofl...-*.. --..-. --

-.---.-l-~.~

l ----- -- *..----- --.--- lNon-Routine Samled Type of strber of Detection!

Range Fraction!

Distance Direc-Range Fraction!

Range Fractionj Reported (Units)

Analysis Analyses (LLD) l Mean from To Positivej Name Miles tion Mean From To PositivejMean from to Positive l Measurements AIR Particulstes Gross Beta 325 0.002 0.028 0.005 0.065 325/325

'RA50.1A0 0.1 N

0.024 0.008 0.059 52/52 0.025 0.006 0.065 46/46 0

weekly (pCi/m3)

ChIrcoat Radiochemical Ccrtridge 1 131 144 0.004

<LLD

<tLD 0

weekly (deleted, effective 4/30/92)

(pCl/m3)

Pcrticulste,

Comosite, quarttrly Gama Isotopic 27 Mn-54 0.001

<LLD

<tLD 0

(pCi/m3)

' Co 57 0.003

<lLD LLD 0

l<*LLD 0

' Co 58 0.002

<LLD Fe-59 0.005

<LLD

<LLD 0

Co-60 0.001

<LLD

<LLD 0

Zn-65 0.003

<LLD

<tLD 0

Zr,Nb-95 0.003

<LLD

<LLD 0

Ro,Rh-106 0.010

<LLD

LLD 0

1-131 0.120

<LLD

<LLD 0

Cs-134 0.001

<tLD

<tLD 0

Cs.137 0.001

<LLD

<lLD 0

i CIRECT RAD I".t ION TLD, 2 per 188 NA 17.2 9.2 21.6 125/125 RTL8.2K0 8.2 Ssw 20.7 19.9 21.6 3/4 17.6 13.8 26.0 21/21 0

gsartirly location.

(Mt/qtr.)

Panasonic type 804 ars) 814, 3 CaSO4 elements per

, badge.

l l

3 Rancho Seco 12 1992 AREOR

TABLE 3 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM

SUMMARY

Name of Facility Rancho Seco Station Docket No. DPR-54 Location of Facility licra ld. CA.

Reporting Period Januarv - December 1992_

l All Indicator Locations l

Location with Highest Armel Mean

)

Control Locations l

(Positive Values Only) l Ntrher of Medita or Lower !

(Positive Values only) l (Positive Values Only)

-" " " ---"-' l Mon-Routine L i m i t o f l - - " " " " - " - - - - - " - ~ - - l " - " - - - " " - - - " - - - - " " " " - " " " - - - " " " - - - "j l - - - - " " - - "R ang e P;thway l

Total Range Fraction!

Distance Direc.

Range Fraction Fraction] Reported Sarrpled Type of Ntrber of Detection]

(Units)

Analysis Analyses (LLD) l Mean From to Positive l Name Miles tion Mean From To Positive! Mean From To Positive jMessurements INEsittm G.rden Genma Isotopic 19 Vegetabits (pCl/kg)

Mn 54 29

<LLD

<LLD 0

ct lesst Fe-59 29

LLD

<LLD 0

temi-Co-58 63

<tLD

<LLD 0

ennualty, Co 60 28

<tLD

<tLD 0

monthly 2n-65 65

<LLD

<tLD 0

during Zr,Nb-95 32

<tLD

<LLD 0

growing I-131 48

<tto

<LtD 0

se: son Cs.134 26

<tLD

<LLD 0

Cs.137 29

<LLD

<tLD 0

Be,La.140 104

<LLD

<LLD 0

INEST I(M Cilk Radiochemical weekly 1-131 85 1

<LLD

<tLD 0

(pci/L)

' Genma Isotopic 179 (monthly Gffective 6/30/92)

Mn 54 6

<tLD I <LLD 0

Fe-59 6

<LLD

<LLD 0

Co 58 12

<LLD

<LLD 0

Co 60 5

<LLD

<LLD 0

Zn-65 12

<LLD

<LLD 0

Zr,Nb 95 6

<tLD

<LLD 0

Cs-134 5

<tLD

<LLD 0

, ts-137 6

<LLD

<LLD 0

l 8s,Le-140 14

<LLD

<LLD 0

Rancho Seco 13 1992 AREOR

i TABLE 3 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM

SUMMARY

Name of Facility Rancho Seco Station Docket No. DPR-54 December 1992 Location of Facility liera ld. CA.

Reporting Period January l

I All Indicator Locations l

Location with Highest Annual Mean Control Locations l

Medlun or Lower (Positive Values Only) l (Positive Values Only)

(Positive Values Only) l Nu @er of

-- l - - " * - - * - - - " "" " "" " - + - ! Non-R out i ne L imi t o f l - - - " - - - ~ ~ " " " " l - " " " " -- - - - - "" " - ~ ~ - - - - ~ ~ " " " " * - i on l Pathway Total Range Fraction!

Distance Direc-Range Fract Range Fraction l Reported samled Type of Nueer of Detection l (Units)

Analysis Analyses (LLD) l Mean From To Positive l Name Miles tion Mean From To Positivej Mean From To Positivejpessurements INGESil0W Game Isotopic 24 l

Soit Storm Dreln Mn 54 19

<LLD

<tLD

<tLD l

0 semi annust Fe 59 43

<LLD

<tLD

<LLD l

0

(;<i/kg)

Co 58 19

<tLD

LLD

<tLD 0

Co 60 24

<LLD

<ttD

<tLD 0

Zn-65 46

<tLD

<ttD

<tLD 0

. LLD

<tLD 0

Zr,Nb 95 22

<tLD l

0 I 131 31

<tLD

<LLD

' Cs.134 18

<LLD

<tLD l <tLD 0

Cs-137 24 103 51 154 7/24 RSLO.3MO 0.3 ESE 154 154 154 1/2

<tLD 0

Be,La 140 68

<LLD

<LLD 0

1 G

16 l

'l ImatSilou

! ame isotopic Sediment (Mud and silt)

Mn-54 19

<LLD

<tLD 0

s semi-annual Fe-59 43

<LLD j

LLD

<LLD 0

.(pCl/kg)

Co-58 19

<tLD f

<tLD

<LLD 0

Co 60 24 99 43 200 3/16 RM50.6MO 0.6 WsW 200 200 200 1/6

<LLD 0

,2n 65 46

<tLD l

<LLD '

<LLD 0

{2r,Nb-95 22

<tLD -

l

<LLD

<LLD 0

1 131 31

<LLD l

<LLD

<tLD 0

1.

Cs 134 18 27 15 37 3/16 RMso.6MO 0.6 WsW 37 37 37 1/6

<LLD 0

Cs 137 24 427 82 1638 15/16 RMso.6Mo 0.6 Wsw 460 174 1438 1/6

<lLD 0

Sa,La 140 68

<LLD

<tLD l <LLD 0

I i

Rancho Seco 14 1992 AREOR t

_ _ _ _ _ _ -. _... _ _,, - _. - - - -, ~.. ~ - - -.., _

,---.---,--.n.ew.

.~-.,.--....---.m.w-..-,~.,....--,..-~

.=

]

TABLE 3 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM

SUMMARY

Name of Fa,:llity Rancho Seco Station Docket No. DPR-54 l

Location of Facility Herald.

CA._

Reporting Period January December 1992 F

I r

i j

Att Indicator Locations j Location with Highest Annual Mean l

Control Locations Medlun or Lower l (Positive Values Only) l (Positive Values Only) l (Positive Values Only)

Nueer of j Non-Routine L i m i t o f l - - - - - - - - - " "- ~ - - - - ~ ~ j - - - - ~ - "

- - " - - - - - - - - - ~ ~ - - ~ ~ ~ ~ ~ ~ ~ ~ l ~ ~ * - - - - - - + ~ - ~ ~ ~ ~ ~ *! R epor t ed PathwIy l

Total Range Fraction l Distance Direc-Range Fraction l Range Fraction sappled Type of NuterofDetectionl (Units)

.l Analysis Analyses (LLD) { Mean From To Positive! Name Miles tion Mean From To Positive l Mean from To-Positive l Measurements testsitou-l l

l soll Gamme Isotopic 10 l

l semi ennuat l

(pCi/kg).

Mn-54 19 ~ <tLD

<LLD

<LLD 0

Fe-59 43

<LLD

<tLD

<tLD 0

l<<LLD l

0 co-58 19

<LLD

<tLD co-60 24 327 149 504 2/10 RsL1.8Mo 1.8 W

307 110 504 2/4 tLD 0

Zn 65 46

<tLD

<LLD 0

Zr.Nb-95 22

<LLD

<LLD 0

l

<tLD

. <tLD 0

1 131 31

<tLD

<tLD l <LLD 0

Cs 134 24

<LLD

'Cs*137 68 1332 93 3484 5/10 RsL1.8No 1.8 W

2697 1910 3484 3/4

' <LLD 0

Se,La 140 90

<LLD f

<tLD

<LLD 0

t l

9

~ tuuEsfl0N l

2 Fish Genue isotopic - 14 l

semi.emuel (pCl/kg)

Mn-54 17

<tLD l

<tLD

<LLD 0

-(edible Fe 59 38

<tLD l

<tLD

<LLD 0

l<LLD portion)

Co-58.

17

<tLD

<LLD 0

4-

<LLD 0

~

Co-60 17

<LLD

<LLD l<<LLD l

0

+

2n e5 39

<LLD

<LLD LLD l

0 Zr,Nb-95 19

<LLD

<LLD l-131 28

<LLD

<tLD

<LLD 0

lCs134 15

<LLD

<tLD 0

lCs.137 19 177 81 264 3/14 RFso.7NO 0.7 W

226 187 264 2/2

. <LLD 0

lOs,Le-140 61

<tLD

<LLD

<LLD 0

l.

I I

a n

Rancho Seco 15 1992 AREOR l-.. -..

l l

TABLE 3 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM

SUMMARY

Name of Facility Rancho Seco Station Docket No. DPR-54 Location of Facility Herald. CA.

Reporting Period Januarv - December 1992 i

l ALL Indicator Locations Location with Highest Annual Mean Contro! Locations Lower l (Positive Values Only)

(Positive Values Only)

Number of Medium or

.l Total L i mi t o f l - - ~ ~ ~ ~ ~ ~ ~ * ~ ~ ~ ~ ~ - - - l - - ~ ~ - - - - - - - - - - - - ~ ~ - ~ ~ ~ ~ " - ~ ~ - ~ ~ - ~ ~ - - l - ~ ~ - - - - ~ ~ - ~ ~ - - ~ ~ - ~ l Non-Rout i ne Pathway Sampled Type of Number of Detectionj Range Fraction!

Distance Direc*

Range fraction!

Range Fraction! Reported i

(Units) l Analysis Analyses (LLD) l Mean - From To Positivej Name Miles tion Mean From To Positivej Mean from To Positive l Measurements IINE5fl0N

?

l

' Algae Gansna isotopic 12 quarterly i (pCi/kg. wet).mn-54 17

<LLD

<tLD

<tLD 0

"Fe-59 38

<LLD

<LLD 0

17

<LLD

<LLD 0

2 17l'<LLD Co-58

<LLD

<LLD 0

j Co 60

<LLD

<LLD 0

39 '

'Zn-65 19 f <LLD 4

<LLD

<lLD l

0 Zr,Nb-95 1-131 28 l <tLD

<LLD

<LLD 0

Cs 134 15 l <LLD

LLD

<tLD 0

Cs.137 19 l 61 21 113 3/12 RAGO.6MO 0.6 WSW 113 113 113 1/2

<tLD 0

Ba,La 140 61 l <tLD

<LLD

<tLD 0

I IINESTIDW Well WIter Tritita 20 1000

LLD

<LLD 0

quartsrly (PCl/L)

Gansne f ootopic 20

?

e Mn 54 6

<tLD

<LLD 0

Fe 59 12 l <tLD

<LLD 0

Co 58 6

<LLD

<LLD 0

Co-60 5

<LLD

<LLD 0

Zn-65 12

<LLD

<LLD 0

Zr,Wb-95 6

<LLD

<LLD 0

1 131 10

<LLD

<LLD 0

Cs-134 4

<LLD

<tLD 0

1

,Cs-137 5l <tLD

<LLD 0

jBa,La 140 14j <LLD l

l *LLD l

C 2

l I

I I

I i

Rancho Seco 16 1992 AREOR I

Y m

m

_.____m_,__-,.mm...m,.n.,..-mm_.-_-,,,_...%.m.,,,_.

,,...%%.,.,.me_,

mm._,,,, _,, _,

,y

TABLE 3 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM

SUMMARY

Name of Facility Rancho Seco Station Docket No. DPR-54 Location of Facility Herald. CA.

Reporting Period January December 1992 l

Att Indicator Locations Location with Nighest Annual Mean Control Locations Medium or 8

Lower (Positive Values Only)

(Positive Values Only)

Number of Pathu2y l

Total Limit of l----------

--l-

-l *-- - - *--

-l Non Routine Senpled j

Type of Ntaber of Detection l Range Fraction!

Distance Direc-Range Fraction l Range Fraction l Reported (Units) l Anetysis Analyses (LLD) l Mean From To Positivej Name Miles tion Mean From To Positive lMean From To Positivejmeasurements luGEsitou l

l Runoff Water Tritita 50 1000

<LLD

<tLD 0

biweekly (pci/L)

- Gansne isotopic 50 t

'Mn-54 6

<LLD

<LLD 0

Fe-59 12

<tLD

<tLD 0

Co 6

<tLD

<tLD 0

Co-60 5

<tLD

<LLD 0

2n-65 12

<tLD

<tLD 0

a Zr,Nb-95 6

<LLD

<LLD 0

1 131 10

<LLD

<LLD 0

Cs 134 4l <LLD

<tLD 0

Cs 137 5

<LLD

<LLD 0

se,La 140 14

<LLD

<LLD 0

IEEESTION surface Water Tritite 70 1000 6703 6078 7328 2/70 RsWo.7NO 0.7 W

7328 7328 7328 1/12

<LLD 0

monthly

(pCI/L)

Gemme isotopic 70 0

Mn-54 6

<LLD

<LLD l

0 Fe-59 12

<LLD

<LLD co-58 6

<LLD

<LLD 0

Co-60 5

<LLD

<LLD 0

2n-65 12

<LLD

<LLD 0

Zr,Nb-95 6

LLD

<LLD 0

LLD 0

1 131 10

<LLD.

f<LLD O

Cs 134 4

<LLD l' <<tLD 0

Cs 137 5

<tLD LLD 0

se,La-140 14 j <LLD i

Rancho Seco 17 1992 AREOR

- - ~

- ~. -. - - - -. - -. -

TABLE 3 ENVI!L MENTAL RADIOLOGICAL MONITORING PROGRAM

SUMMARY

Name of Facility Rancho Seco Station Docket No. DPR-54 Location of Facility lierald. CA.

Reporting Period January - December 1992 l

All Indicator Locations l Location with Highest Annual Mean l

Control Locations l

Medium or Lower l (Positive Values Only) l (Positive Values Only) l (Positive Values Only) l Nw ber of Pathw1y l

Total Limit of l

-~~ - - ----- ----

l --------------*------- ---- - -- *-- ---- ---- ---- -j*------- ----- -*--

.-.*l Won-Routine Sanpled Type of Nw ber of Detection l Range Fraction!

Distance Direc-Range Fraction!

Range fraction! Reported (Units) fAnalysis Analyses (LLD) l Mean From to Positive l Name Miles tion Mean From To Positive lMean From To PositivejMeasurements INGL5fl0N Drinking fritita 12 1000

<LLD

<LLD 0

Wzter monthly Radiochemical 3

(pci/L)

Iodine-131 4

1

<LLD

<tLD 0

Gemma Isotopic 12 Mn-54 6

<tLD

<tLD 0

Fe 59 12

<tLD

<tLD 0

Co-58 6

<LLD

<LLD D

Co-60 5

<LLD

<tLD 0

Zn'65 12

<LLD

<LLD 0

Zr,Nb-95 6

<LLD

<LLD 0

Cs.134 4

<LLD

<LLD 0

cs-137 5

<LLD

<lLD 0

Ba,La.140 14

<LLD

<LLD 0

Rancho Seco 18 1992 AREOR

V.

REFERENCES l

i ANSI 75 American National Standards Institute, Inc., 1975,

" Performance, Testing and Procedural Specifications for Thermoluminescent Dosimetry," ANSI N545-1975.

CFRa Code of Federal Regulations,

1992,

" National Primary Drinking Water Regulations," Title 40, Part 141.

CFRb Code of Federal Regulations, 1992, " Standards for Protection Against Radiation," Title 10, Part 20.

CFRc Code of Federal Regulations,

1992,

" Domestic Licensing of Production and Utilization Facilities," Title 10, Part 50.

CFRd Code of Federal Regulations, 1992, " Environmental Radiation Protection Standards for Nuclear Power Operations," Title 40, Part 190.

NCRP76 National Council on Radiation Protection and Measurements,

1976, Environmental Radiation Measurements, NCRP Report No. 50.

j NRC7.

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).

NRC75 United States Nuclear Regulatory Commission, 1975,

" Programs for Monitoring Radioactivity in the Environs of Nuclear Power Plants," Regulatory Guide 4.1, Revision 1.

l NRC77 United States Nuclear Regulatory Commission, 1977, l

i

" 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.

l l

NRC79a United States Nuclear Regulatory Commission, 1979, "An Acceptable Radiological Environmental Monitoring Program,"

Branch Technical

Position, Revision 1.

Rancho Seco 19 1992 AREOR 4

)

V.

REFERENCES (continued)

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.

I 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 Ef fluent Technical Specifications f or 5

PWRs," NUREG-0472, Revision 2.

NUREG80a United States Nuclear Regulatory Commission, 1980,

" Methods for Demonstrating LWR Compliance with the i

EPA Uranium Fuel Cycle Standard (40CFR190)," NUREG-0543.

RS92A Rancho Seco Nuclear Generating

Station, 1992,

" Semiannual Radioactive Effluent Release Report, January - June 1992," Sacramento Municipal Utility District report.

RS92B Rancho Seco Nuclear Generating

Station, 1992,

" Semiannual Radioactive Effluent Release Report, July - December 1992," Sacramento Municipal Utility District report.

i i

I l

l l

Rancho Seco 20 1992 AREOR

I VI.

APPENDICES l

Rancho Seco 21 1992 AREOR

t APPENDIX A 1992 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 l

4.0,

" Land Use Census", an annual land use census was conducted from November 24, 1992 to February 18, 1993. The primary objective l

of the land use census was to identify the location of the nearest milk animal, the nearest residence and the nearest garden of greater than 500 square feet producing fresh leafy vegetation.

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

Census interest areas were identified through document searches and field observation.

Detailed information was subsequently gathered by individual interviews when possible.

Direct observation was l

used for locations where the resident was not available for i

interviewing.

All distances to interest areas were obtained by inspection of maps supplied by the SMUD Land Department.

Resident names have been replaced with letters in this Appendix.

The 1992 Land Use Census did not identify any changes in the use of the unrestricted areas that would require modifications in the l

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 10CFR50, Appendix I, section IV.B.3.

i l

l i

1 k

Rancho Seco A-1 1992 AREOR

A.

RESIDENT EXPOSURE PATHWAY

SUMMARY

Inhalation, Ground Plane and Water Consumption The 1992 census identified the eleven nearest residents living within the required five mile (8047 mete:r) radius of the Station as shown below:

Sector Distance Identification (meters)

(resident code)

A

>8047 N/A B

>8047 N/A C

4830 "A"

D 1128 "B"

E

>8047 N/A F

>8047 N/A G

2560 "C"

H

>8047 N/A J

6540 "D"

K 2210 "E"

L 2314 "F"

M 2195 "G"

N 2200 "H"

P 5608 "I"

Q 6340 "J"

R 7245 "K"

Of the eleven residents identified, 7 were interviewed. All of the interviewed residents indicated they use well water for consumption and other domestic purposes.

It is expected that all eleven residents use well water for consumption and other domestic purposes.

1 Rancho Seco A-2 1992 AREOR l

i i

I

B. DEPOSITION EXPOSURE PATHWAY

SUMMARY

Milk (goat or cow), Vegetation, and Beef Consumption l

The 1992 census identified potential deposition exposure pathways at the locations listed below:

Sector Distance Consumption Comment / Resident Code (meters)

Pathway l

A

>8047 Goat or cow milk A

>8047 Garden vegetation A

433 Beef Restricted Area Boundary B

>8047 Goat or cow milk B

>8047 Garden vegetation

(

B 430 Beef Restricted Area Boundary C

>8047 Goat or cow milk Garden vegetation C

>8047

C 430 Beef Restricted Area Boundary D

1128 Cow milk "B" residence D

>SO47

Garden vegetation r

D 448 Beef Restricted Area Boundary E

>8047 Goat or cow milk E

>8047 Garden vegetation E

472 Beef Restricted Area Boundary F

>8047 Goat or cow milk F

>8047 Garden vegetation F

667 Beef Restricted Area Boundary G

>8047 Goat or cow milk jg-den vegetation "L" residence G

7040

G 235 Beef Restricted Area Boundary H

>8047 Goat or cow milk H

>8047 Garden vegetation H

198 Beef Restricted Area Boundary Rancho Seco A-3 1992 AREOR

l

?

B.

DEPOSITION EXPOSURE PATHWAY

SUMMARY

Milk (goat or cow), vegetation, and Beef Consumption Sector Distance Consumption Comment / Resident Code (meters)

Pathway 1

J

>8047 Goat or cow milk J

>8047 Garden vegetation J

195 Beef Restricted Area Boundary K

2500 Goat milk "M" residence l

K 2210

Garden vegetation "E" residence K

198 Beef Restricted Area Boundary L

>8047 Goat or cow milk L

3600

Garden vegetation "N" residence L

286 Beef Restricted Area Boundary M

>8047 Goat or cow milk L

Garden vegetation M

>8047

M 405 Beef Restricted Area Boundary N

>8047

Cow milk N

3536 Garden vegetation N

509 Beef Restricted Area Boundary P

P

>8047 Goat or cow milk Garden vegetation P

>8047

P 442 Beef Restricted Area Boundary Q

>8047 Goat or cow milk Garden vegetation l

Q

>8047

Q 500 Beef Restricted Area Boundary R

>8047 Goat or cow milk R

>8047 Garden vegetation R

448 Beef Restricted Area Boundary 1

The distance to this potential consumption pathway

)

changed as a result of the 1992 Land Use Census

)

Rancho Seco A-4 1992 AREOR i

I I

i i

l B. DEPOSITION EXPOSURE PATHWAY

SUMMARY

l Milk (goat or cow), Vegetation, and Beef Consumption In 1992 The ODCM and REMP manuals were revised to reflect the i

minimal potential for significant airborne particulate or radiciodine releases.

The ODCM uses default dispersion and 3

deposition parameters for dose calculations performed for all i

airborne releases.

The requirement for sampling radioiodine was deleted from the ODCM and REMP manuals during 1992.

The number of air samplers required by the REMP manual was reduced to three.

l Currently, there.are two air samplers on site and one air sampler (control location) off site.

These three air samplers are primarily to monitor atmospheric releases not of station origin

}

(fallout) and to maintain a historical record of airborne activity.

j Identification of the nearest receptor for the milk and vegetation

[

]

pathuays is useful for continued evaluation of the utilization of i

the land surrounding Rancho Seco.

i Because of the extremely small amount of radioactive gaseous i

effluent released from the site, Deposition Exposure Pathway I

changes were considered inconsequential.

The changes indicated in i

the milk, vegetation, and beef consumption table do not necessitate j

modification of ODCM (r REMP practices.

i i

i I

i i

)

i t

i i

1 f

4 j

t F

a I

Rancho Seco A-5 1992 AREOR I

5 I

C.

IRRIGATED CROP EXPOSURE PATHWAY

SUMMARY

Laguna Creek Based on information stated in the Galt Irrigation District's 1992 Crop Report, 3,272.5 acre-feet (1.05 billion gallons) of Laguna Creek water was diverted for irrigation purposes during the 1991 crop production season (up to October 31,1992).

Laguna Creek was the sole source of irrigation water as the Galt Irrigation District did not receive Federal water from the Bureau of Reclamation.

A total land area of 1,043 acres was subject to irrigation as follows:

i l

l l

I i

Identification Acre Feet Acreage Crop l

(resident code)

"O" 340.2 124 Clover / Sudan "P"

21.8 40 Pasture "Q"

109.2 40 Clover "R"

771.1 196 Rice / Sudan / Clover "S"

124.1 100 Corn "T"

71.6 200 Clover "U"

90.9 40 Alfalfa "V"

347.8 95 Corn / Sudan / Alfalfa "W"

557.2 168 Pasture "X"

173.1 40 Alfalfa Considering the total acreage dedicated to crop production, clover was the predominant irrigated crop (372 acres), followed by pasture (208 acres), corn (165 acres), sudan (149 acres), alfalfa (95 acres), and rice (54 acres).

Crop production was not supplied directly for human consumption.

These crops may be indirectly supplied through the beef or milk consumption pathways.

The beef and milk pathways were evaluated by analyzing airborne releases for radioiodine and strontium.

Rancho Seco A-6 1992 AREOR

C.

IRRIGATED CROP EXPOSURE PATHWAY

SUMMARY

(continued)

Laguna Creek As discussed earlier, Rancho Seco no longer has the potential to release radioiodine (the decay of all Iodine 131 of plant origin has exceeded 10 half lives and no production mechanism exists).

Strontium was not identified as being released via the plant j

airborne release pathways.

Also, historical REMP results of beef sampling during both operational and pre-operational periods show that the beef pathway is not an actual exposure pathway.

For j

these reasons beef sampling was discontinued.

. Milk sampling is only being maintained to facilitate the State of California radiological environmental sampling program conducted under contract for the NRC and not because it has been identified as an i

actual exposure pathway.

j None of the interviewed residents identified in the deposition

}

exposure pathway (Section B) indicated that they utilized Laguna s

Creek water to irrigate their gardens.

Based on direct observation i

cattle consume water from the Clay, Hadselville and Laguna Creeks.

{

D. OTHER EXPOSURE PATHWAYS l

l The 1992 Land Use Census confirmed previous knowledge that the i

Clay / Laguna Creeks and the Rancho Seco Reservoir are utilized by some local residents and the general public for recreational and I

aquatic life consumption purposes.

A majority of the surveyed j

residents could not estimate with reasonable certainty i'

usage / occupancy factors for their consumption and/ or recreational activities. Therefore, insufficient data existed to justify ODCM usage factor modification.

i l

I i

Rancho Seco A-7 1992 AREOR

I l

E.

REMP EVALUATION An objective of the 1992 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.

l Resident Exposure Pathway i

The inhalation and ground plane exposure pathways, the principal l

components of the Resident Exposure Pathway, are monitored directly l

and indirectly by thermoluminescence dosimetry (TLD), air and soil sampling and analysis.

A review of existing REMP locations for these activities showed that the Resident Exposure (Section A) i pathways were being indirectly monitored at more conservative sites.

Well water was adequately monitored at five sites.

Therefore, 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 (Section B) is monitored directly within the Station Site Boundary through foodstuff (garden vegetation) sampling and analysis.

As discussed earlier, 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.

All pathways identified in Section B were monitored directly or indirectly at a more conservative sampling site.

Therefore, since the current REMP was representative and conservative with respect to Deposition Exposure Pathway monitoring, no changes were required.

1 Irricated Croo Exposure Pathway The existing REMP was effective with respect to monitoring the

~

identified irrigated crop exposure pathways.

This conclusion was based on the fact that the REMP included irrigated vegetation sampling.

REMP surface water surveillance activities adequately monitor irrigation water quality.

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

Rancho Seco A-8 1992 AREOR

i i

l i

4 i

s l

E. REMP EVALUATION (continued) l Other Exposure Pathways j

l Existing aquatic life, surface water and sediment sampling and l

analysis practices are effective in monitoring potential observable

,l effects associated with recreational activities occurring at the Clay Creek, Hadselville Creek, Laguna Creek, Folsom South Canal and Rancho Seco Reservoir.

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

g i

4 Considering the above, no REMP changes were required to monitor

]

other exposure pathways.

l 1

r h

a t

4 i

f 1

l I

i i

)

i w

F j

i i

Rancho Seco A-9 1992 AREOR f

f

i 1

F. ODCM EVALUATION Based on 1992 Land Use Census findings, the following potential exposure pathways exist at the indicated locations:

Exoosure Pathway Location Comment GASEOUS EFFLUENT Inhalation 1128 m ENE Resident location having the highest dispersion parameter Ground Plane 1128 m ENE Resident location having the highest deposition parameter Vegetation 2210 m SSW Resident location having the highest deposition parameter Goat Milk 2500 m SSW Resident location having the highest deposition parameter Cow Milk 1128 m ENE Resident location having the highest deposition parameter Beef 195 m SSE Cattle grazing within the Site Boundary location having the highest deposition parameter LIQUID EFFLUENT Freshwater Fish Clay Creek Recreation beyond the Site Boundary Swimming Clay Creek Recreation beyond the Site Boundary Shoreline Deposits Clay Creek Recreation beyond the Site Boundary Irrigated Forage Laguna Creek Milk animals grazing beyond the Site Boundary Irrigated Forage Clay Creek Catt! e grazing within or beyond the liite Boundary Drinking Water Clay Creek Cattle drinking water within or beyond the Site Boundary Rancho Seco A-10.

1992 AREOR

l l

F. ODCM EVALUATION (continued) l l

The GASEOUS EFFLUENT locations for inhalation, ground plane, and beef are inherently conservative since they are sited within the Station Site Boundary.

The vegetation and goat milk locations which are outside the site boundary are conservative due to the t

I fact

that, as stated

earlier, the potential for airborne particulate releases is minimal and the ODCM uses conservative i

default dispersion and deposition factors.

USNRC guidance (NUREG-0133) references ODCM calculations to locations at or beyond the Site Boundary.

l i

l Specifying the Laguna Creek location also provides additional l

conservatism since the beneficial effects of downstream dilution are not considered when specifying effluent release restrictions.

l l

As required by the 1992 Land Use Census the above information for l

exposure pathways and locations was submitted for incorporation in i

the ODCM for use during 1992.

l l

l t

i Rancho Seco A-11 1992 AREOR

t 1

I 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 Generating Station) followed by two letters to identify the sample media:

AS Air SL Soil RW Runoff Water FS Fish SW Surface Water LV Garden Vegetable DW Drinking Water AG Algae WW Well Water TL Direc' Gamma Radiation (TLD) j MS Mud and Silt MF Milk l

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.

l The next letter designates the sector in which the monitoring location is located.

The letters A through R are used for sector designators. The letters I and O are not used to prevent confusion with the numbers one and zero in the ID codes.

l Sector Letter Dearees Azimuth Compass Point-i 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 l

E 78.75 to 101.25 E

i l

F 101.25 to 123.75-ESE l

G 123.75 to 146.25 SE r

H 146.25 to 168.75 SSE l

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 j

N 258.75 to 281.25 W

P 281.25 to 303.75 WNW Q

303.75 to 326.25 NW I

R 326.25 to 348.75 NNW Rancho Seco B-1 1992 AREOR i

~.

4 i

i l

SAMPLE SITE DESCRIPTIONS AND MAPS i

j (continued) i i

}

The final letter designation indicates operational program ("O") or j

post-operational program ("P"),

s I

Table B-1 lists each site referencing the sample type and the i

location ID code to the map site number on one of the four Radiological Environmental Monitoring Site Maps included in this 2

Appendix.

i Figure B-1 shows the locations of the sample locations on and/or j

near the Site (including Storm Drain locations).

Figure B-2 is the One Mile Radius map.

Sampling locations within' i

one mile of the reactor building are shown on this map.

Figure B-3 is the Five Mile Radius map.

Sampling locations between one and five miles from the reactor building are shown on this map.

I Figure B-4 is the 25 Mile Radius map and it contains the locations I

from five to 25 miles from the reactor building.

i i

b 4

i I

h l

[

h 4

)

kj i

e

)

l i

+

7 i

i i

f Rancho Seco B-2 1992 AREOR i

4 4

~

i l

g e

1 } y ir as e yl i 3 i fI y8 I-I [I f I J W 3 97I-jdj 5 j# g e ~ 1 G A[fliiil1ht;tfiths'5.llh;tild sfil]hililiblHflhililnnhlllllidklt hl ilm i t ti D e a4444 de d dit tiliitididit t,in titiM A lfinitisidit titit itt i \\\\ j t,,,,_

p.,._._._.._._.._.._ _._.)

T.1 !V O n 1 % 1-I i .J l.g p._._. 3 If k I lab 3 r i i._.J._.J i f 8 E is G i ! C C s' = = l r ~ _q( s N U \\ I [ E

A R

z l g g t l_ l U._. I i 8 (*I i - FgP.,f[f,g -1 5 i a 1 i gg 3 r-g m._._._._ [ j i 's. g ,.J ' 8 L.:_ _) k. _. - a! o '-s. j f., ; s. 1 s, s s. ~ N'N [,

n

\\$ s s. s A;--........ O \\{ N g __,,____. n 05 Ne of 5 N e / y{ / ^.' - T-- _ _._.~. _._,_,,,./ Figure B-1. Radiological Environmental Sampling Locations on and/or near the Site (Storm Drain Location Numbers in parenthesis) Rancho Seco B-3 1992 AREOR

l \\ ~ i \\ N j i NNW NNE l NW NE ce / i / HWY 1N ENE WNW I' [ 23 00 i 0 0 ; '.'.ra c-s W 17. E 2. l 7 x. 4' ewn _. d l

13

+ i WSW l l ESE Y' 1 } 2"""

k s

SW SE i SSW SE I \\ g l i l Figure B-2. Radiological Environmental Sampling Locations within 1 mile from the Reactor Building I Rancho Seco B-4 1992 AREOR

= . = . ~. i l l I I l ~ t i N NNW NNE i erI NE i NW /p l l l /j ss~ l lse ENE WNW t l I I i 1 f I / / m l I ss. r j I t a w s u El n I a>"a== sa 1 st 2 _[ c \\ (( km x,! m 34. r p ea 1 43 ~ / I i ESE wsW j, 2 47 5 i l 3 I SW as SE ) I* SSE S --- sue ramm soumomr Figure B-3. Radiological Environmental Sample' Locations from 1.to 5 miles from the Reactor Building i l Rancho Seco B-S 1992 AREOR

^ ~ 1 4 l j l l N / NM NNE \\

b

/ NW NE

74 d

WNW ENE i / re. $~ /,, = so w l .I w L* .5 se l 'W y rt " "M E 77 a .no ~ p.-,3 ,an. e n-o. w

se g

I 7', a WSW II,,,,c, .,o= ESE j es l t 7 i I SW SE i ? ssw SSE i t t __ _ m %ry scuem I l i [ Figure B-4. Radiological Environmental Sample Locations 5 to 25 miles j from the Reactor Building i f Rancho Seco B-6 1992 AREOR

Table B-1 Radiological Environmental Monitoring Sites and Map Locations Map Sanple ID Location Cottection Type Code Class No. Frequency Description of Location Miles Sector AIR RASO.1CO INO 1 Weekly On Site. PAP BLDG 0.1 C AIR RAS 23.00 CON 74 Weekly SMUD Headquarters 23.0 0 AIR RASO.2KO IND 101 Weekly On Site South Perimeter 0.2 K AIR RASO.2PO INO 102 Weekly on Site. IOS Building 0.2 P AIR RASO.1A0 IND 103 Weekly On Site. East Cooling Tower 0.1 A AIR RASO.7EO IND 3a Weekly Meteortogical Tower 0.7 E AIR RA50.250 IND 104 Weekly Landscape Building 0.2 8 AIR RASO.3MO IMO 105 Weekly on Site. Effluent Discharge 0.3 M MILK RMFO.800 INO 3 Weekly Marclet Ranch 0.8 D MILK RMF5.8PO IND 75 Weekly Mederlos Dairy 5.8 P MILK RMF8.2KO INO 76 Weekly Angelo Dairy 8.2 K MILK RMF24.LO CON 78 Weekly De Snayer Dairy 24.0 L RUNOFF WATER RRWO.6MO INO 5 Biweekly site Boundary 0.6 M SURFACE WATER RSWD.7NO IND 6 Monthly Water Susp 0.7 N SURFACE WATER RSW1.3F0 INO 30 Monthly Rancho Seco Reservoir 1.3 F SURFACE WATER RSW3.7NO CON 31 Monthly Conposite ISCO Conposite Sanpler at Folsom South Canal 3.7 N SURFACE WATER RSWO.3M0 IND 4 Monthly Conposite ISCO Conposite Sanpler at Ef fluent Discharge 0.3 M DRINKING WATER RDWO.1GO IND 7 Monthly-Rancho seco Site 0.1 G WELL WATER RWWO.3E0 IND Ta Quarterly Site Welt 0.3 E WELL WATER RWWO.800 CON 3 Quarterly Marclet Ranch 0.8 D WELL WATER RWWO.8LO IND 9 Quarterly Clay Cattle Feedtot 0.8 L WELL WATER R W3.7MO IND 34 Quarterly ${tva Feed Lot Welt 3.7 N WELL WATER R W2.1M0 luo 37 ouarterly Clay Area Welt (Tipting's) 2.2 M MUD AND SILT RMSO.3MO INO 4 Quarterly Ef fluent Olscharge - 0.3 M MUD AND SILT RMSO.6MO IND 5 Ouarterly Site Bom dary 0.6 M MUD AND SILT RMSO.7NO IND 6 Quarterly Water Supp 0.7 N MUD AND SILT RMSt.8No INO 33 Ouerterly confluence of Clay and Hadselvitte Creeks 1.8 N MUD AND SILT RMS3.7NO INO 31 Quarterly Laguna Creek at Folsom South Canal 3.7 N FISH RFSO.3M0 INO 4 Querterly Ef fluent Discharge 0.3 M FISM RFS0.6MO IND 5 Quarterly Site soundery 0.6 M FISH RFt0.7No IND 6 Quarterly Water Supp 0.7 N FISM RFSt.5F0 CON 38 Ouarterly Rancho Seco Reservoir 1.5 F ALGAE RAGO.3MO IMO 4 Quarterly Effluent Discharge 0.3 M ALGAE RAGO.6MO IMO 5 Quarterly Site soundary 0.6 M ALGAE RAGO.7NO IMO 6 Quarterly Water Supp 0.7 N ALGAE RAG 1.8MO INO 33 Quarterly Confluence of Clay and Hadselvitte Creek 1.8 N ALGAE RAG 3.7No INO 31 Quarterly Hadselvitte Creek at Folsom South Canal 3.7 N ALGAE RAG 10.NO IND 77 Ouerterly Laguna Creek at McKentle Road 10.0 N ALGAE RAG 14.M0 IND 81 Quarterly Laguna Creek at Twin Cities Road 14.0 M Rancho Seco B-7 1992 AREOR

Table B-1 (Continued) Radiological Environmental Monitoring Sites and Map Locations Map Samle ID Location Cottection Type Code Ctess No. Frequency Description of Location Miles Sector Soll RSLO.2H01 IND 10e Guerterty Storm Drain No. 1 0.2 H Soll RSLO.2H02 IND 10e Quarterly Storm Drotn No. 2 0.2 H Soll RSLO.2Jo INO 11 Quarterly Storm Drain No. 3 0.2 J S0!L RSLO.2KO IND 12 Quarterly Storm Drain No. 4 0.2 K Soll - RSLO.3Lo IMO 13 Quarterly Storm Drain No. 5 0.3 L SOIL RSLO.2MO IND 10b Quarterly Storm Drain No. 6 0.2 N Soll RSLO.3M07 IND 4e Guerterly Storm Drain No. 7 0.3 M S0ll RSLO.3M08 IND 4b overterly Storm Drain No. 8 0.3 M Soll RSLO.3MO9 IND 4c Quarterly Storm Drain No. 9 0.3 M Soll RSLO.6MO IND 5 Quarterly Site Boundary 0.6 M Soll RSLO.7NO INO 6 Quarterly Silva Property 0.7 M Soll RSL1.5NO IND 32 Quarterly Silva Property 1.5 N Soll RSL1.8MO IND 33 Quarterly Silve Property. Hadselvitte Creek 1.8 N soll RSLO.390 IND 15 Quarterly Storm Drain No. 10 0.3 A SOIL RSLO.3NO IND 17 Ouarterly Storm Drain No. 12 0.3 N Soll RSLO.3R0 IND 16 Quarterly Storm Drain No. 11 0.3 0 i GARDEN VEGETABLES RLVO.5A0 IND 14 SemiaAnnual, MTGS* Site Garden North 0.5 A GARDEN VEGETABLES RLVO.6MO IND 22 Seml* Annual, MIGS

Site Boundary Garden irrigated with Clay Creek water 0.6 M

GARDEN VEGETABLES RLV18.K0 CON 73 Semi-Annual, MTGS* Lodi Area 18.0 K ' MIGS' means Monthly Throughout the Growing Season. TLD RTL23.100 CON 74 Quarterly Transit control Location (EOF), #0 23.1 0 TLD RTLO.3R0 IND 23 Quarterly NNW G Perimeter Fence N/O Spray Ponds, #1 0.3 R TLD RTLO.3C0 IND 24 Quarterly NE Perimeter Fence, parking lot, WE corner, #2 0.3 C TLD RTLO.3No IND 17 Quarterly W Perimeter Fence road, pole, top of hill, #3 0.3 N TLD RTLO.3LO IND 13 Quarterly SW Perimeter Fence Rd., a Rancho Seco Lake, #4 0.3 L TLD RTLO.3No IND 25 Quarterly Perimeter Fence, S/0 of Ada 5tdg #5 0.3 H ILD RTLO.4F0 IND 26 Quarterly Tech / Visitor's Center, (NRC), #6 0.4 F TLD RTLO.5C0 INO 27 Quarterly Rt. 104 entrance to Rancho Seco, #7 0.5 C TLD RTL6.200 IND 69 Ouerterly Mitter Residence - 12414 Kipper Kopper Ln., #8 6.2 0 TLD RTL23.000 CON 74 Ouerterly Snuo Headquarters, 6201 '58 Street. #9 23.0 0 TLD RTLO.8LO INO 2 Quarterly Tokey Substetton, #11 0.8 K TLD RTL8.8E0 IND 71 Quarterly lone Sewage Treatment Plant, #12 8.8 E TLD RTL10.No IMO 77 Ouerterly Wernerdem Dairy,12121 McKenzie Rd, #13 9.7 N TLD RTL10.N0 CON 72 Querterly Mokelume Fish Matchery a Cemenche Reservoir, #15 9.8 H TLD RTL2.7LO INO 41 Quarterly in Clay at Tipting's Residence 11633 Clay Station Rd, #16 2.1 M TLD R1L8.2KO IMO 76 Ouerterly Elliott Cemetery Near Angelo Dairy, #17 8.2 K TLD RTL7.8CO IMO 70 Quarterly Sam Jeber Residence, 601 Carbondete Rd, Ione, #18 7.8 C TLD RTLO.7GO INO 63 Quarterly Well pts 9 fence 3 reservoir, #19 1.7 G TLD RTL1.5MO INO 42 Guerterly Clay East & Kirkwood (NRC), #20 1.5 M TLD RTLI.7LO IND 43 Quarterly 11879 Kirkwood, #21 1.7 L TLD-RTL3.8LO IND 47 Quarterly Clay Station Rd N/0 Bennett Rd, #25 3.8 L TLD RTL3.9K0 IND 48 Ouerterly SSW of site on Borden Rd, #26 3.9 K TLD RTL3.6JO IMO 49 Quarterly S/0 Site on Borden Rd. #27 3.6 J TLD RTL7.4MO IND 88 Ouarterly Herald Fire Station #87

12746 Ivie Rd, #30 7.4 M

Rancho Seco B-8 1992 AREOR . - _.~.- -,- - -,. - - - -,, - -._- .- ~

Table B-1 (Continued) Radiological Environmental Monitoring Sites and Map Locations Map Sawte ID Location Cottection Type Code Class No. Frequency Description of Location Miles Sector TLD RTL3.7NO IND % ouarterly Folsom South Canal near Hobday Rd, #31 3.7 N TLD RTL4.8PO IND 52 cuarterly N/End of Woods Road, #32 4.8 P TLD RTL3.8Mo IND 53 ouarterly Feedlot a Hwy 104 & Folsom South Canal Pu ging Station, #33 3.8 M TLD RTL3.800 IND 54 overterly Clay Station Rd a Laguna Cr, #34 3.8 0 TLD RTL1.940 IND 55 Quarterly Hadselvitte Cr & Plant Effluent Cr, #35 1.9 N TLD RTL1.7FO IND 28 ouarterly Parks & Rec Dept Bldg at reservoir, #43 1.7 G TLD RTL1.7E0 IND 36 ouarterly 1st pote N/0 SMUD gate N/0 reservoir, #44 1.7 E TLD RTL2.3F0 IND 63 ouarterly ESE of Site. Pole E/0 reservoir, #45 2.3 F TLD RTL1.400 IND 29 ouarterly 0.9 Miles E/0 Site on Twin Cities Road, Rt 104, #46 1.4 D TLD RTL3.7DO IND 65 ouarterly S/0 104 near Hadselville Cr, #48 3.7 0 TLD RTL10.0E0 CON 89 Quarterly Preston School of Industry, lone, #51 10.0 E TLD RTL19.0E0 CON 90 Quarterly Jackson Potice Station, #52 19.0 E TLD RTL12.0Go CON 79 Quarterly Camanche Reservoir Entrance, #53 12.0 G TLD RTL8.0PO IND 91 Quarterly Dillard School, #55 8.0 P TLD RTL4.600 IND 68 Quarterly Morris Levy Residence - 9845 Clay Station Rd, #56 4.6 o TLD RTLO.8DO IND 3 ouarterly Marclet Ranch, 14626 Twin cities Rd, #63 0.8 D TLD RTLO.6MO IND 5 cuarterly Site soundary irrigated Garden, #65 0.6 M TLD RTLO.4No IND 4 ouarterly Depression a Clay Creek, #66 0.4 N TLD RTLO.41No IND 4 cuarterly Spoit Pile a Clay Creek, #67 0.4 N TLD RTLO.3PO IND 97 ouarterly West Fence, #68 0.3 P TLD RTLO.2Po IND 112 ouarterly Fence Behind IOS BLds, #70 0.1 N TLD RTL12.0MO IND 83 ouarterly N/E Easement Hwy 99 & 104 12.0 M TLD RTLO.2P01 Special 100 cuarterly Barret Farm, Outer Fence, west side, #72 0.2 P TLD RTLO.2P02 Special 100 ouarterly Barret Farm, Outer Fence, west side, #73 0.2 P TLD RTLO.2P03 Special 100 cuarterly Barret Farm, Outer Fence, north side, #74 0.2 P TLD RTLO.2PO4 Specist 100 ouarterly Barret Farm, Outer Fence, north side, #75 0.2 P TLD RTLO.2P05 Speclat 100 ouarterly Barret Farm, Outer Fence, east side, #76 0.2 P TLD RTLO.2PO6 Speclat 100 ouarterly Barret Farm, Outer Fence, east side, #77 0.2 P TLD RTLO.2P07 Special 100 cuarterly Barret Farm, Outer Fence, south side, #78 0.2 P TLD RTLO.2P08 Special 100 Quarterly Barret Farm, Outer Fence, south side, #19 0.2 P TLD RTLO.2P09 Speclat 100 .ouarterly Switchyard, northeast corner, #80 0.2 P TLD RTLO.2P010 Speclat 100 ouarterly Site Perimeter Road, west side near 105 Bldg., #81 0.2 P TLD RTLO.2P011 Specist 100 ouarterly 105 sullding Roof, northeast corner,'#82 0.2 P TLD RTLO.2P012 Special 100 cuarterly Diesel Fuel Storage Tank Area, north side, #83 0.2 P TLD RTLO.1MP Special 106 ouarterly Maintainance Building, #84 0.1 M TLD RTLO.1LP Specist 107 ouarterly Fabrication Shop, # 85 0.1 L TLD RTLO.2LP Speclat 108 ouarterly Material Storage Area, #86-0.2 L TLD RTLO.2MP Spectat 109 ouarterly Switchyard, #87 0.2 M Rancho Seco B-9 1992 AREOR .,_ _ _ _ _ _. _. _. _ _ ~__ _ _

l I APP,ENDIX C QUALITY CONTROL SAMPLE ANALYSIS RESULTS QUALITY ASSURANCE AND CONTROL Implementation of the Radiological Environmental Monitoring Program (REMP) consists of a number of discrete steps including: Sample collection, a Packaging, a Shipment and receipt, a Measurements of radioactivity, a Data evaluation, and a Reporting. a 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, Controls for Environmental Pollution, Inc. (CEP), and the results of their participation in the Interlaboratory Comparison Program conducted by the United States Environmental Protection Agency (EPA). The Interlaboratory Comparison Program and the CEP Quality Assurance Program provide information on the validity (accuracy and precision) of the REMP implementation steps listed above. f 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) and complements the Rancho Seco Quality Manual (RSQM). Rancho Seco C-1 1992 AREOR

INTERLABORATORY COMPARISON PROGRAM CEP participates in the Interlaboratory Comparison Program (ICP). The ICP is a radiological analysis quality control program sponsored by EPA's Environmental Monitoring Systems Laboratory in Las Vegas. Part.icipation in the ICP is a requirement of the Permanently Defueled Technical Specification (section D6.8.3.b.3). t 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 raterial in REMP samples by CEP and other laboratories. The extent of CEP participation in this program includes all of the environmental radioactivity determinations that are offered by the EPA and related to the analyses required by the REMP manual. The EPA 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 by the EPA, there is an implied precision requirement given in terms of the analysis requested to be performed. After all the labs provide the results of their analyses (three are required from each lab), the EPA publishes a statistical summary of all the results by all laboratories. This report includes the EPA 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 CEP in the ICP are outside the specified control limits or do not pass the outliers test, CEP must investigate and, if a problem is identified, take corrective action to prevent problem recurrence. l During 1992, CEP analyzed 44 ICP samples for isotopes that are directly or indirectly related to the analysis required by the REMP. Of these, 2 of the results were identified as outliers. In

addition, 6 of the analysis results were identified as being outside the control limits. The remaining 38 were within the control limits, passed the outliers test, and are considered acceptable by the EPA.

The CEP measurement results are presented in Table C-1 along with the acceptable EPA values for each test. t Rancho Seco C-2 1992 AREOR

INTERLABORATORY COMPARISON PROGRAM (Continued) As required by the CEP contract an investigation was conducted for the two results identified as outliers and for the 6 results identified as being outside the control limits. Results of the investigation and corrective action taken (if required) are as follows: l l Test Nuclide Known CEP Value j Value y Gamma in Tater Co-60 20.0 29 (Outlier 1) Intercomparison Gross Beta 53.0 90.0 B (Outlier 2) Gross Beta / Gross Beta 140.0 90.7 Gamma in Water (Below Limit 1) Radient clides I-131 78.0 60.0 in Milk (Below Limit 2) l Gamma in Water Ru-106 141.0 171.0 (Above Limit 1) Gamma in Water Zn-65 99.0 129.0 (Above Limit 2) Gross Alpha / Gross Beta 50.0 23.3 Beta in Water (Below Limit 3) Gamma in Water Ru-106 175.0 136.0 (Below Limit 4) o Outlier 1: Investication Results: Analysis results for Co-60 was high. The sample was counted on a detector that showed high bias. High results were obtained for other isotopes analyzed on the same detector. Corrective Action: The detector was recalibrated in January 1993 with 9 month old standards. New standards have been ordered, and the detectors will be recalibrated in March 1993. Rancho Seco C-3 1992 AREOR

INTERLABORATORY COMPARISON PROGRAM (Continued) o Outlier 2: Investication Results: Reported values were high, i but the raw data for the Gross Beta analysis was within control limits. The reported values could l not be traced to the raw data. Corrective Action: CEP personnel involved in f reporting of results will be instructed to review CEP-QA-104 and exercise caution when reporting data to EPA-EMSLV. o Below Limit 1: l Investication Results: Trend on cross-checks indicates low results for beta emitters. It is i believed that beta efficiencies are too high. Corrective Action: By the end of the first quarter of 1993 new beta absorption curves and efficiencies will be developed. { o Below Limit 2: Investication Results: I-131 is a beta emitter and is counted on the proportional counter. It is believed that the beta efficiencies were too high. Corrective Action: At the end of the first quarter i of 1993, new absorption curves and efficiencies i will be developed. i i o Above Limit 1: i Investication Results: Analysis results for Ru-106 l was high. The sample was counted on a detector i ( that showed high bias. High results were obtained l l for other isotopes analyzed on the same detector. l Corrective Action: The detector was recalibrated in January 1993 with 9 month old standards. New l standards have been ordered, and the detectors will be recalibrated in March 1993. ( l l Rancho Seco C-4 1992 AREOR i . - -. _, _. ~, - - - - 1 -

~ I INTERLABORATORY COMPARISON PROGRAM j (Continued) t o Above Limit 2: Investication Results: Analysis results for Zn-65 was high. The sample was counted on a detector that showed high bias. High results were obtained I for other isotopes analyzed on the same detector. f Corrective Action: The detector was recalibrated 1 in January 1993 with 9 month old standards. New standards have been ordered, and the detectors will be recalibrated in March 1993. t o Below Limit 3: j Investication Results: Gross. Beta results were reported low. Trend on cross-checks indicates low .results for beta emitters. It is believed that j beta efficiencies are too high. Corrective Action: By the end of the first quarter of 1993 new beta absorption curves _and efficiencies will be developed. o Below Limit 4: Investication Results: Analysis results for Ru-106 l was low. The sample was counted on a detector that l showed high bias. High results were obtained for ) other isotopes analyzed on the same detector for l the EPA samples analyzed in June 1992. Although the bias was high for the detectors used, the result fcr the Ru-106 was low. Corrective Action: The detector was recalibrated l ~ in January 1993 with 9 month old standards. New j standards have been ordered, and the detectors will ) be recalibrated in March 1993. INTRALABORATORY QUALITY ASSURANCE PROGRAM CEP also operates an Intralaboratory Comparison Program (Quality Assurance Program) to maintain an acceptable quality level.on a routine basis. i Rancho Seco C-5 1992 AREOR I l

1 l INTRALABORATORY QUALITY ASSURANCE PROGRAM (continued) As part of their Quality Assurance Program, CEP performs a 'l background count, an analysis of a spiked sample, and a duplicate sample count for every ten Rancho Seco REMP samples analyzed, i These quality control procedures are performed for all analyses I except gamma spectrometry, for which weekly energy and efficiency checks are performed. The spiked and duplicate samples are prepared by CEP personnel not directly involved with the analysis. i Spiked samples, as well as the radioactive sources used for -the i gamma spectrometer checks, are traceable to the National Institute l for Standards and Technology (NIST). { l In all cases during 1992, the duplicate analyses and the tritium i spikes were acceptable. EXTERNAL AUDIT AND SURVEILLANCE RESULTS As stated previously, the RSQM requires periodic compliance audits f of REMP activities, including CEP. During 1992, CEP's performance l was evaluated by the Rancho Seco QA Department. This evaluation r determined that CEP performed adequately. The Rancho Seco QA program requires an audit every three years. The next REMP l contract laboratory audit is due in 1993. l l l CONCLUSIONS Based on the results of interlaboratory and intralaboratory quality control measurements and reviews. made during 1992, it can be concluded that CEP provided valid measurements of radioactive i material in Rancho Seco REMP samples. The Co-60 (gamma in water) j ICP outlier (high result) did not result in an adverse impact on REMP sample results as indicated in Appendix F, Tables F-8 through j F-11. These results show that the REMP samples had no detectable Co-60. The other outlier and the above and below limit ICP results I did not result in a negative impact on the Rancho _ Seco REMP {

results, because the isotopes identified are not present in significant enough levels in plant effluent, based on their production mode and half-life.

The results of this review also l indicated CEP's internal quality control program was effective in maintaining their systems and procedures at an acceptable level of quality. The REMP technical staff continue to monitor the contractor laboratory and identify improvements in their Quality Assurance program. Rancho Seco C-6 1992 AREOR L

. - - -...,. - ~ -.- [ f DIRECT RADIATION (TLD) COMPARISON PROGRAM The TLD vendor, ICN Dosimetry Services, participates in a monthly i blind spike comparison testing program sponsored by the University l of Michigan. A review of ICN's results of the participation in this testing program indicates that ICN 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. l l l i l f i ? I t i I 1 l t I i i l-i 4 d Rancho Seco C-7 1992 AREOR i - 4 1 0 3 . - - ~,. _ _ -.

l ~ TABLE C-1 INTERLABRATORY COMPARISON PROGRAM 1992 Statistical Report Summary Data for Responding Lab "PV" (Controli for Environmental Pollution Inc.) Known PV Acceptable Study Date Nuclide Value Mean EFA Value Cmunent Gross Alpha-Beta in Water 1/31/92 Gross Beta 30.0 32.0 21.3 - 38.7 Gross Alpha-Beta in Water 1/31/92 Gross Alpha 30.0 16.7 16.1 - 43.9 todine in Water 2/07/92 1-131 59.0 61.0 48.6 - 69.4 l Gamma in Water 2/14/92 Ba-133 76.0 80.0 62.1 - 89.9 I Gamma in Water 2/14/92 Co-60 40.0 45.3 31.3 - 48.7 Gamne in Water 2/14/92 ts-134 31.0 32.0 22.3 - 39.7 GamFe in Water 2/14/92 Cs-137 49.0 55.0 40.3 - 57.7 Gamma in Water 2/14/92 Ru-106 203.0 208.3 168.3 - 237.7 Gamra in Water 2/14/92 2n-65 148.0 168.3 122.0 - 174.0 Tritium in Water 2/21/92 H-3 79D4.0 7913.0 6533.4 - 9274.6 Air Filter 3/27/92 Alpha 7.0 6.0 0.0 - 16.0 Air fitter 3/27/92 Beta 41.0 40.0 32.3 - 49.7 Air Filter 3/27/92 ts-137 10.0 17.3 1.3 - 18.7 Gross Beta / Gamma in Water 4/14/92 Gross Beta 140.0 90.7 103.6 - 176.4 Below Limit cross Beta / Gamma in Water 4/14/92 Co-60 56.0 61.7 47.3 - 64.7 Gross Beta / Gamma in Water 4/14/92 Cs-134 24.0 26.0 15.3 - 32.7 Cross Beta /Ganna in Water 4/14/92 Cs-137 22.0 28.3 13.3 - 30.7 Radionuclides in Nilk 4/24/92 Cs-137 39.0 43.3 30.3 - 47.7 madionuclides in Milk 4/24/92 1-131 78.0 60.0 64.1 - 91.9 Below Limit Gamma in Water 6/05/92 Co-60 20.2 29.0 11.3 - 28.7 Outlier Gamma in Water 6/05/92 Cs-134 15.0 15.0 6.3 - 23.7 Gamma in Water 6/05/92 ts-137 15.0 12.7 6.3 - 23.7 Gamma in Water 6/05/92 Ru-106 141.0 170.7 116.7 - 165.3 Above limit Gamma in Water 6/05/92 2n-65 99.0 128.7 81.7 - 116.3 Above limit tritium in Water 6/19/92 H-3 2125.0 2009.7 1523.0 - 2727.0 Air Fitter 8/28/92 Alpha 30.0 25.0 16.1 - 43.9 Air Filter 8/28/92 Beta 69.0 68.3 51.7 - 86.3 Air Filter 8/28/92 Cs-137 16.0 26.3 9.3 - 26.7 Gross Alpha \\ Beta in Water 9/18/92 Gross Beta 50.0 23.3 41.3 - 58.7 Below Limit Radionuclides in Milk 9/25/92 Cs-137 15.0 21.3 6.3 - 23.7 Gamns in Water 10/09/92 Co-60 10.0 15.0 1.3 - 18.7 Gamma in Water 10/09/92 Cs-134 8.0 9.0 0.0 - 17.0 Ganne in Water 10/09/92 Cs-137 8.0 B.O 0.0 17.0 Ganna in Water 10/09/92 Ru-106 1 75.0 136.0 144.0 - 206.0 Below limit Gamre in Water 10/09/92 2n-65 148.0 156.0 122.0 - 174.0 Intercomparison B 10/20/92 Co-60 15.0 14.6 6.3 - 23.7 Intercomparison B 10/20/92 Cs-134 5.0 8.0 0.0 - 13.7 Intercomparison B 10/20/92 Cs-137 8.0 8.0 0.0 - 16.7 Intercomparison B 10/20/92 Gross Beta 53.0 90.0 35.7 - 70.3 outlier Tritium in Water 10/23/92 H-3 5962.0 5876.7 4928.0 6996.0 1 i Rancho Seco C-8 1992 AREOR

l t APPENDIX D SANPLE 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 f I contract laboratory, Controls for Environmental Pollution (CEP). i l A brief description of these collection and analysis methods is [ included in this Appendix. l Samnle Media Collection / Analysis Method l AIR A mechanical air sampler continuously moves air I through two filters designed to capture particulates by filter paper impaction and i radiciodine by charcoal adsorption. The samplers t are equipped with a flow totalizer which measures the volume of air that has passed through the charcoal canister and filter paper. .An elapsed i l time meter is installed to identify pump motor l l malfunctions which cause discontinuous sampling events. l The charcoal canister and filter paper are exchanged weekly. At least one day is allowed to elapse between sample collection and counting to l reduce the interference of naturally occurring radon and thoron daughters on the sample analysis. i The charcoal canister is subjected to alkaline l leach extraction and the eluent is assayed for + radiciodines by thin-window gas flow proportional l counting.- The filter paper is assayed for gross beta radioactivity by placing the filter on a l 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. Rancho Seco D-1 1992 AREOR l i-i 1 -

I l Samule Media Collection / Analysis Method DIRECT RADIATION Thermoluminescent dosimeters (TLDs) are deployed in near and far-field areas. Two TLD's, each j containing three CaSO :Dy phosphors, are placed at 4 each monitoring location to assure adequate data' recovery and to improve measurement statistics. t The TLD field exposure cycle-is approximately three months. At the end of the field exposure cycle, the TLD's are exchanged with recently annealed ones j and returned to a contract laboratory for l processing.. The exposure reported by the l laboratory is the average of six values, corrected for non-field exposure cycle contributions. j SOIL & SEDIMENT Samples of sediment and soil are collected quarterly from the top three inches of the sampled material. Sediment samples are obtained i approximately two feet from the shoreline. Each j sample is assayed directly for gamma isotopic radioactivity by gamma spectroscopy. ,l i GARDEN PRODUCE Samples of leafy green and tuberous vegetables are collected during the growing season from gardens which are maintained at the Station. The vegetables are assayed directly for gamma isotopic l radioactivity by gamma spectroscopy. RAW MILK One gallon grab samples of unpasteurized milk are collected weekly from day tanks at local dairies. After the sample is assayed directly for gamma isotopic radioactivity by gamma spectroscopy, the sample is mixed with anion exchange resin and an iodine carrier. The iodine is eluted from the resin and precipitated as silver iodide.. The i filtered precipitate is dried and weighed to determine chemical recovery. The precipitate is then assayed for 1888 beta radioactivity by thin-i window gas flow proportional counting. l l l Rancho Seco D-2 -1992 AREOR

~. t 4 Sample Media Collection / Analysis Method FISH Several species of fish are col]ceted quarterly from the Clay Creek system and the Rancho Seco Reservoir (fish only). Collection efforts are continuous during each sampling interval until sufficient sample mass is obtained. The dissected I (edible) portion of each sample is assayed directly for gamma isotopic radioactivity by gamma spectroscopy. l ALGAE Pint samples of algae in the Clay Creek system and the Rancho Seco Reservoir are collected quarterly i and assayed directly for gamma isotopic radioactivity by gamma spectroscopy. l WATER One gallon grab samples of water from locations in the liquid effluent pathway and groundwater that i are collected as follows: surface water. and i drinking water are collected monthly, runoff water is collected biweekly, and well water is collected [ quarterly. At two locations, samples are i periodically obtained to provide a monthly i composite sample. All samples are assayed for i tritium by liquid scintillation counting and for gamma isotopic radioactivity by gamma spectroscopy. l l 4 I: Rancho Seco D-3 1992 AREOR u 7-

l ~ l i APPENDIX E ENVIRONMENTAL MONITORING PROGRAM DESIGN i PROGRAM BASIS l The Sacramento Municipal Utility District conducts a continuous Radiological Environmental Monitoring Program (REMP) at the Rancho l Seco Nuclear Station to assess the impact of Station operation on the surrounding environment. The current REMP is a continuation of l a similar program initiated prior to operation of the Station. l 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. The l California Department of Health Services conducts a parallel environmental monitoring program under contract from the USNRC. i i During 1992 the program was directed and executed by the Nuclear Radiation Protection / Environmental Monitoring / Emergency 7 Preparedness / Chemistry Manager. Sample collection is performed by Chem / Rad Decommissioning Technicians. Data review and Program maintenance are performed by the Radiological Health l Superintendent. The Program is operated with primary accountability and cognizance of the Deputy Assistant General { Manager, Nuclear. The Program is designed consistent with Title 10, Code of Federal Reculations, 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 106. These federal requirements are cited in the Rancho Seco Permanently Defueled Technical 'oecifications 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 Frocedures and Health Physics Implementing Procedures.

l Rancho Seco E-1 1992 AREOR

1 i i i PROGRAM BASIS (Continued) i 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 i monitoring the environs for radioactivity -sources. The radioactive sources which contribute to detectable radioactivity in the local environs are comprised of: naturally occurring background, releases during normal operations, world-wide weapons testing, and major global nuclear accidents r 2. Provide the means to verify the effectiveness of the Rancho Seco Nuclear Station Radiological Effluent Control Program. 3. Meet the minimum detectable limits for radioisotopes in l environmental samples. 4. Provide quantitative measurements in the gaseous, liquid and direct radiation exposure pathways for radionuclides. [ t 5. Provide indications of the largest potential radiation l exposure for individuals as a result of radionuclides in the principle exposure pathways. The Program is developed and conducted using recognized standards and practices [ ANSI 75, NRC75, NRC79a, NRC79b, NUREG79, NUREG80a, NCRP76]. REMP CHANGES j REMP Manual. Revision 5: On April 30, 1992, REMP Manual Revision 5 was issued. The revision consisted of: i 1. Incorporating the provisions of USNRC Generic Letter 89-l 01 to support the implementation of Rancho Seco Technical l Specification Amendment 118 (Removal of RETS from the Rancho Seco Technical Specification). 2. Incorporate administrative controls formerly found in the Rancho Seco Technical Specification. 3. Delete requirement for radioiodine sampling and analysis from all sample types. Rancho Seco E-2 1992 AREOR l

l I REMP CHANGES (continued) REMP Manual. Revision 5 (continued): 4. Delete requirement for invertebrate (crawfish) sampling. The following is a summary of changes made by this revision: Airborne: Deleted radioiodine requirement for airborne samples. Requirement not applicable when radioiodine analysis has been deleted. f Milk: Deleted radioiodine requirement for milk samples. Requirement not applicable when radioiodine analysis has been deleted. Invertebrates: Deleted requirement for sampling invertebrates (crawfish). Invertebrate species indigenous to the environs surrounding Rancho Seco are not recreationally or commercially important based on the results of the annual Land Use census. LLD Values: Deleted I-131 from Table of LLD values. Requirement not applicable when radioiodine analysis has been deleted. Reportina Values: Deleted I-131 from Table of Reporting Values. Requirement not applicable when radioiodine analysis has been deleted. REMP Manual Revision 6: On August 20, 1992, revision 6 to the REMP manual was issued. The revision was made in response to the issuance of the " Possession Only" license and the Permanently Defueled Technical Specifications for the Rancho Seco Nuclear Station. The revision to the REMP was made in accordance with the applicable regulatory guidance and based on the current plant conditions. The revision consisted of the following changes: 1. Reduced the number of sample locations for airborne particulate, milk, fish, vegetation, and TLDs. 2. Reduced the sample frequency for milk and fish sampling. 3. Reduced the radius for identification of land usage parameters from 10 miles to 5 miles. j Rancho Seco E-3 1992 AREOR D

- ~. ~ a i 2 i s i REMP CHANGES i (continued) i 1 1 f f REMP Manual Revision 6 (continued): 4. Increased the calibration frequency for environmental air ] monitors flow measuring devices from 18 months to 12 months. 1 l 5. Added the sample identification designator letter "P", to l I indicate a sample location that was instituted after the i issuance of the Possession Only License. l 6. Removal of isotopes from the LLD and Reporting Level Tables which are no longer applicable due to the g production mode and half-life of the isctope. l These changes were made to reflect the defueled condition of the f plant, the noted license amendments, non-operation of the reactor i since June 7, 1989, and the minimal potential for an airborne i release of particulate or gaseous isotopes. The revision consisted j of the following changes: [ i Land Use Census: The radius for the identification of land usage i parameters was reduced from 10 miles to 5 miles. This is consistent with the requirements of the USAR/ DSAR section 2.2.5, Land Use. Airborne:

1. Reduced the number of air sample locations from 8 to 3.-

This reduction in locations reflects the current plant conditions l and the reduced potential for an airborne release. The number l of air monitoring locations recommended in the regulatory l guidance (NRC79a) are based on an operating nuclear power plant. The worst case accident scenario evaluation for a release from the Spent Fuel Building after a fuel handling accident has been completed as part of the Decommissioning Plan submittal. This evaluation indicates that the dose at the site boundary in this worst case condition would not exceed 15 mrem and the primary isotope of concern for the dose calculation would be Kr-85. The Rancho Seco Emergency Plan zone has been reduced to the site boundary due to this dose calculation and accident scenario evaluation. The environmental air monitors only monitor particulate activity and therefore are ineffective in monitoring a gaseous release in the remote instance where a fuel handling accident were to occur. Rancho Seco E-4 1992 AREOR l i i

t i REMP CHANGES (continued) REMP Manual Revision 6 (continued): Airborne (continued): For these reasons the number of locations for air monitoring was reduced to three. l The air sampler indicator locations were selected based on: 1. Highest D/Q, X/Q sectors, and historical data (PAP Building location ) 2. Power supply reliability and distance from the PAP Building (Plant Effluent Discharge location). The control location (Meteorological Tower) was selected due to the distance from the site, power supply reliability, and historical data. 2. Increased the frequency for calibration of the air measuring devices on the environmental air monitors to 12 months from 18 months. This frequency is consistent with the guidance given in Regulatory Guide 8.25 [NRC92]. Vecetation: Changed the number of garden locations from 3 (two gardens on site plus the control location) to 2 (one garden on site plus the control location). This change in the number of gardens is based of the current plant conditions and the reduced potential for an airborne release. The garden location established north of the site was to monitor activity from the airborne pathway. This location was deleted due to this reduced potential for an airborne release. Direct Radiation: The number of TLD locations was reduced from 40 to 24. As discussed in the section on airborne monitoring, this reduction reflects the current plant conditions, the potential for an airborne release, and the minimal activities being conducted that could create an airborne release. The monitoring of direct l radiation by these 24 locations reflects the bases of the REMP to l monitor the direct radiation from the radioactive material on site l and also the direct radiation received by the general population l l surrounding the plant. Locations were selected to the southwest of l the plant plus the site reservoir to provide a representative evaluation of the site and the offsite population locations that are used for residential and recreational purposes. Rancho Seco E-5 1992 AREOR l \\

REMP CHANGES (continued) REMP Manual Revision 6 (continued): Direct Radiation (continued): Onsite locations will be maintained at several places along the site perimeter. Control locations greater than 5 miles were selected to provide the necessary statistical correlation. Milk: The number of milk sample locations was reduced to 1, and the frequency of collection was reduced to monthly. As discussed l in the previous section for the reduction in TLDs, the number and frequency of milk sampling was reduced to reflect current plant conditions and the reduced potential for an airborne release. The i primary function for sampling milk is to evaluate the airborne l iodine pathway to man. The iodine liquid pathway analysis i requirement was deleted with License Amendment No. 118. Fish: The number of fish location was reduced from 3 to 1, and the frequency of collection was reduced from quarterly to semiannually. Also changed was the requirement to collect both species (predator and scavenger) from the required sample locations. This change reflects the current conditions of the effluent discharge canal. Commencing with the second quarter 1992, a new type of sampling equipment was used to improve our ability to collect the required l sample mass. This new equipment consisted of a back-pack mounted electrofisher unit. Collection attempts at several locations along the effluent discharge canal showed that the required amounts and species remained difficult to collect, and the possibility of a negative impact on the fish population became a concern. Due to this concern, the frequency and required sample collection amount was reduced. The impact on the native fish population will continue to be evaluated during subsequent collection periods. The necessary adjustments will be made to the REMP to insure that the fish population is not impacted by the REMP collection requirements. Sample Identification: Wording was added to allow the use of the letter designation "P" to the sample identification coding process. This letter will designate a sample as one that is originated after the issuance of the Possession Only License. The current letter designation "O" is described as being used for samples originated during the operating phase of the site. 1 Rancho Seco E-6 1992 AREOR l

REMP CHANGES l (continued) l REMP Manual Revision 6 (continued): i LLD and ReDortina Level for REMP Measurements Chances: L Changes to the LLDs and Reporting Levels given in the Branch Technical Position (BTP) [NRC79a] were made due to the fact that the BTP is given as guidance for an operating plant. The current-plant conditions discussed earlier were evaluated to provide the [ basis for the following changes: i 1. The Gross Beta, Tritium (H-3), Mn-54, Co-60, Zn-65, Cs-134, and Cs-137 LLDs or Reporting Levels were not changed. 2. Fe-59 is produced only by activation. The half-life of Fe-59 is 44.5 days. Any Fe-59 that was present at shutdown has undergone >10 half-lives of decay and therefore is no longer present at a measurable level. The requirement to analyze and report Fe-59 was therefore deleted. 3. Co-58 is produced only by activation. The half-life of Co-58 is 71 days. Any Co-58 that was present at shutdown r has undergone >10 half-lives of decay and is no longer present at measurable levels. The requirement to analyze { and report Co-58 was therefore deleted. 4. Ba/La-140 are parent daughter isotopes that are combined t in the LLD and Reporting Level tables (Table E-1 and Table E-2) due to the decay relationship they share. La-140 is the daughter decay product which has an energy signature that is easier to detect than its parent isotope Ba-140. This fact produces the notation in some l isotope tables and in the REMP Tables as a combined l requirement for measuring (LLD value) and reporting the i isotopes. Ba-140, the parent isotope, is a fission i i product with a half-life of 12.8 days. Any Ba-140 that was present at shutdown has undergone >10 half-lives and therefore is no longer present. Ba-140 is also produced by the decay of other fission products. These fission l products are Xe-140,I-140, and Cs-140. The longest j half-life of these isotopes in the decay chain is 64 seconds. Any of these precursors to Ba-140 has therefore also undergone >10 half-lives of decay. l Rancho Seco E-7 1992 AREOR i l

REMP CHANGES (continued) REMP Manual Revision 6 (continued): LLD and Reportina Level for REMP Measurements Changes (continued):

4. (continued)

Since the presence of any Ba-140 or any of the precursors of Ba-140 have been reduced to levels that are not I measurable the LLD and reporting requirements were deleted for the Ba-140/ La-140 isotopes. l l S. Zr/Nb-95 are also parent-daughter isotopes that are fission products. The parent isotope Zr-95 has a 65 day half-life and the daughter Nb-95 has a 35 day half-life. l Any Zr-95 that was present at shutdown has undergone >10 half-lives as has the daughter isotope Nb-95. Since the levels of Zr-95 and Nb-95 are not measurable the LLD and l reporting requirements were deleted for the Zr/Nb-95 isotopes. 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 five mile radius of the plant site. Each of these three parameters is discussed below. 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. Rancho Seco E-8 1992 AREOR

EXPOSURE PATHWAYS (continued) Effluent Release Pathways (continued) Gaseous Effluents Gaseous ventilation and process effluents are-released, through particulate filtration units (requirement for charcoal filtration was deleted in 1992) to the environment from the Reactor Building, Auxiliary Building and Auxiliary Building Grade Level Vent stacks. Processed liquid effluents are released from two onsite Retention Basins into Clay Creek. 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. Liauid Effluents In the liquid exposure pathway, radioactive materials in surface waters can be ingested by humans 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 or otherwise drank 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 such as the Borated Water Storage Tank. 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. Rancho Seco E-9 1992 AREOR l l 1 i

LAND USE CENSUS On an annual basis, a land use census is conducted within a five 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 1992 is presented in Appendix A of this Report. From data obtained from the Land Use Census, exposure pathways are 3 analyzed through a systematic process which identifies.a sample medium or cenanfsm that is found to potentially contribute to an ~ individual's radi.ation exposure. Usage and bioaccumulation factors l (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 r samples obtained at indicator and control sites are routinely compared to identify potential exposures above background levels. i i MONITORING LOCATION SELECTION The REMP maintains the minimum monitoring sites required by the REMP manual, Table 6. This minimum program is supplemented with additional samples to compensate for changes in the radiological environment surrounding Rancho Seco. Some of the monitoring sites were also selected by the United States Nuclear Regulatory Commission and the California Department of Health Services 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 i 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 it's presence can be attributed to Rancho Seco operations. Moreover, especially with l most liquid effluent pathway samples, the detection of radioactive i 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 l (pre-1992) depositions. j i l Rancho Seco E-10 1992 AREOR t i l i I

MONITORING LOCATION SELECTION (continued) Control locations provide data that should not be influenced by the i 1 operation of Rancho Seco. These locations are selected based upon i 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 l 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 (such as the i 1986 Chernobyl accident) which may result in human exposure. 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 10CFR50, Appendix I dose guidelines. "No Name" Creek flows southerly into the Clay Creek. Without this dilution water flow, the Clay Creek would be in a dry state for most of the year. Beyond the Site Boundary at a point north of Highway 104, the Clay Creek empties into the Hadselville Creek. Hadselville Creek then empties into the Laguna Creek at a point west of North Clay Station Road near the Folsom South Canal. Shortly beyond this intersection, water supplied from the Folsom South Canal flows into the Laguna Creek. 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 passive devices (thermoluminescent dosimeters - TLD's) at monitoring sites distributed in sectors centered on the Station. The TLD's 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. Rancho Seco E-11 1992 AREOR

I MONITORING LOCATION SELECTION (continued) Some TLD's have been sited in special locations to record direct radiation resulting from known depositions of radioactive material i and to provide pre-operational data for the proposed Interim Spent l Fuel Storage Installation (ISFSI). Appendix B contains a detailed description and illustration of the REMP sample and monitoring sites. 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 coincide with one of the following exposure pathways: o Atmospheric o Direct radiation o Terrestrial o Aquatic life o Water Atmospheric monitoring is accomplished by filtering a volume of air using a mechanical air pump to collect particulates with a particulate filter paper. Three air sampler locations are used to collect weekly air samples. One location (Meteorological Tower) is i a control location and the remaining two locations are indicator locations on the plant site. Direct radiation monitoring is achieved by placing TLD's at above-ground sites. TLD's respond to, and record the amcunt of, gamma radiation exposure. The source of this gamma radiation expocure is varied and includes potential Station effluents and naturally-occurring terrestrial and cosmogonic radionuclides. The TLD's are also influenced by seasonal and global (fallout) radiation sources. Almost all the exposure recorded by a TLD could be traced to terrestrial radionuclides. l There are 24 sites which are monitored by thermoluminesence dosimetry within a 10-mile radius of the Station. The TLD's are placed at the Station Industrial Area Boundary, near the property boundary, locations of interest such as nearby residences, and also at control locations located beyond five miles of the Station. Rancho Seco E-12 1992 AREOR

I i f SAMPLE MEDIA l (continued) { i i Terrestrial monitoring is accomplished by obtaining samples of { sediment, soil, garden vegetation, and milk to measure the quantity of radioactive material deposited from gaseous and liquid effluents. There are 5 mud and silt, 19 soil, 2 garden vegetation, and 1 milk sites. l Aquatic monitoring includes the sampling of fish and algae. Algae is an excellent concentrator of radioactivity contained in water l and is sampled to provide an early indication of increased liquid j radioactive material concentration. There are 1 fish and 5 algae l sample sites. [ l Water monitoring includes samples of surface, runoff, drinking, and well sources from locations in the liquid effluent pathway and from l area wells. The 6 surface water sampling locations monitor site supply water (Folsom South Canal), runoff water and water i discharged from the Station. Drinking water is sampled from 5 i groundwater wells. d SAMPLE ANALYSIS & DATA HANDLING 1 i The laboratory which provides radio-analytical services for the i Program is Controls for Environmental Pollution (CEP) located in Santa Fe, New Mexico. Sample analysis results submitted by CEP are l reviewed for accuracy and completeness and then entered into a j computerized data base for evaluation and trending. [ ] Data comparisons are made between individual control and indicator sample sites to isolate potential Station influences on the j measurement results. l The summarized results of the 1992 Radiological Environmental l Monitoring Program are presented in Table 3. Individual (raw data) results are presented in Appendix F, Tables F-1 through F-11. REGULATORY REPORTING LEVELS CEP sample analysis data is promptly reviewed and evaluated by the Radiological Health Superintendent as the results are received. All sample analysis results are reviewen for correct sensitivity and anomalies. Rancho Seco E-13 1992 AREOR

J REGULATORY REPORTING LEVELS (continued) The activity concentration values listed in Table E-1 are the environmental Fuel Cycle Dose quantities that, if exceeded, require l a Special Report to be submitted to the USNRC. In accordance with l 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 j exceeded. In addition to the Fuel Cycle Dose reporting requirements, a Special Report is required to be submitted to the USNRC when more i than one of the radionuclides in Table E-1 are detected in the i 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 i the potential annual dose commitment exceeds the 10 CFR 50, i Appendix I guidelines. t No reports of the types described above were required to be i submitted during 1992, SENSITIVITY OF THE REMP MEASUREMENT PROCESS i All Program measurements must be performed at a sensitivit y which l meets USNRC requirements. This sensitivity is determined "before l the fact" (a oriori) for each radionuclide of interest and sample i analysis type. Typical controllable sensitivity parameters include: f i o Sample volume or mass o Sampling efficiency o Time from sample collection to measurement l o Instrument detection efficiency for the nuclides l l (energies) of interest o Background radiation levels-o Chemical recovery factors Rancho Seco E-14 1992 AREOR

SENSITIVITY OF THE REMP MEASUREMENT PROCESS (continued) By adjusting and controlling each of these parameters to maximize measurement process efficiency, a maximum sensitivity level (activity concentration) can be specified for each nuclide of interest and analysis type while maintaining an economic measurement process. The maximum sensitivities in the REMP are specified by the USNRC in the REMP Manual approved for Rancho Seco. These sensitivities are referred to as "LLD's", an acronym for " Lower Limit of Detection". LLD's are specified on an "a priori" basis and apply to routine measurement process capabilities when no other interfering radioactivity is present. The word " routine" is emphasized since occasional circumstances, such as limited sample mass, elevated levels of background radiation and interfering l nuclides can contribute to sensitivity degradation. l Such occurrences are normally noted and reported during the conduct of REMP activities. j 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 entablish 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 E-15 1992 AREOR

1 l t TABLE E-1 REPORTING LEVELS FOR RADIOACTIVITY CONCENTRATIONS IN ENVIRONMENTAL SAMPLES I f Analysis Water Airborne Fish Milk Food f (pCi/L) Particulate (pCi/kg, (pci/L) Products or Gases wat) (pCi/kg, 3 (pCi/m ) wat) H-3 2 x 10' I (a) l Mn-54 1 x 10 3 x 10" 5 Fe-59 4 x 10 1 x 10' 2 l 8 4 Co-58 1 x 10 3 x 10 2 Co-60 3 x 10 1 x 10" 2 Zn-65 3 x 10 2 x 10" Zr/Nb-95 4 x 10 l 2 (b) I 2 I-131 2 0.9 3 1 x 10 8 3 Cs-134 30 10 1 x 10 60 1 x 10 t Cs-137 50 20 2 x 10' 70 2 x 108 2 Ba/La-2 x 10 300 (b) t 140 (b) Gross 40 2 f Beta Notes: (a) For drinking water samples, this is a 40 CFR Part 141 value j (b) Total for parent and daughter Rancho Seco E-16 1992 AREOR i

TABLE E-2 MAXIMUM LLD VALUES FOR ENVIRONMENTAL SAMPLES I Analysis Water Airborne Fish Milk Food Sediment [ (d) (pci/L) Particulate (pci/kg, (pCi/L) Products (pci/kg, j or Gases wat) (pCi/kg, dry) (pCi/m') dry) f Gross 4 1 x 10 -2 Beta (b) l H-3 2000 (1000, b) Mn-54 15 130 Fe-59(a) 30 260 Co-58(a), 15 130 Co-60 Zn-65 30 260 Zr-95(a) 30 Nb-95(a) 15 I-131(a) 1 7 x 10 -2 1 60 (b) Cs-134 15 5 x 10 -2 130 15 60 150 (10, b) Cs-137 18 6 x 10 -2 150 18 80 180 l (10, b) Ba-140(a) 60 60 I i La-140(a) 15 15 l Notes: (a) Analysis requirement deleted in revision 6 of the REMP manual, j (b) LLD for water samples utilized for human consumption only. f (c) Composite analysis LLD is Shown; individual sample LLD is 0.05 i pCi /m'. (d) Other peaks which are measurable and identifiable, together with ! the nuclides in Table E-2, should be identified and reported [NRC79a). Rancho Seco E-17 1992 AREOR

APPENDIX F 1992 SAMPLE ANALYTICAL RESULTS ? i t I Rancho Seco F-1 1992 AREOR i l l

I I . M.iggggg~ggggggggggggggggggggggggg~gg 1 ir x

o. o. o. o. o. 8. o. o. o. o. o. o. o. O. O. O. o. o. o. o. O. O. O. O. O. O. o. o. o. o. o. 8. o. o.

o m +* m l i !.h.E;-e<m-~ N m*~~omR a ~o~~e<.mmeme a memo - ---~ ~ ~ 3 3. m mo. o..o.3.o.~.~. .m - ~ m -o o o o o.o.o. o.o.. o. . o. o. o. o. . o. c. o. 3. ~. 3. o. o m .g

c. o.

g

=

i

M oooooooooooooooooooooooooooooooooo

-~~~~--~-~~--~--~--------- --~---

f w D.o. O.O.O.o.o.o. o.o. o. o. o. o.o.o.o. o. o. o. o.O.O.o. o. o. o. o. o.O. O. o. o.o. 6 .. N. t +.

= l r

t g i N020 4 R 8; A2 4~ CN"R40 bu 232 0 80 *8.R"C Ab:0 i i. 5 o.o. o.o. o. o. o.o. o.o. o.o. o.o. o.o.o. o. o. o. o.o. o.o. o. o.

o. o. o. o. o. o. o.

r r 2 .-~~~~~--~-~~-~~~~~--~~---~----~-~~ e

ggggggggggggggggggg888888888888888 a

e

s I

L s = gy 3 i a t. E. s. s. 2. E. E. B. E. E. E. 5. 5. E. E. E. 9. 5. $. s. B. E. E. E. E. E. S. i. s a t . < c. N md. g m

'h l

OM *-eNNNN-eNeNN----NN---eee---e--NeN-Q > N. loooooooooooooooooooooooooooooooooo + . O. o.0 0.o.0 0 0 0 0.o.0 0 0 0 0 0 0. o.0 0 0.o.o. 0.o. 0 0. o. o.0 0 0. o. i w 4 o . o'. m c k.I:: mmmmmmmmm~m.m~~..~- 8 umm ms.~.m~ m 3 .~~m muo-m-~~--~-~~---. o.o.o.o. o.o. o.o. o.o. o.o.o.o.o.o. o.o. o.o.o.o.o.o. o. o. o.o

m-mm a

x 1 m a

s t :.

a m ~ e n E c A _I. :~~~~~~--~~~~--~-~~------------~-~-2.:888888888888888888888888888 e .g a m M o u w a H 8 2 i m 4 O

Su:

w s a e .m~~~..~.~.~.mmemse.mmsm-meo ..-~~m .~m84mmo- -~~--~-~m---o--------m-m~ g g ege: o.o.

0. o.o. o.o. o.o. o.o. o. o.o.o. o.o.o.o. o.o.o.o. o. o. o.o. o. o. o.o. o. o.

k g!---~~---~--------~---------------- e d ._8 ,8888888888888888888888888888888888 l e N m m m a

o :

.A.8.-~m -N8o*~e<~~mmmmenema-emmemommmo ..omm t H m mm m-~~-~~-~m---o--------~-~~ O . R, . o.o. o.o.o.o. o.o.o.o. o.o. o.o. o.o. o. o. o.o. o. o. o.o. o. o. o.o.o.o. o.o.o. o. 1 4 e

= ;

t .c

.l :.--~~~~--~--~-----~------------~---

M s l'g:8888888888888888888888888888888888 x, g t 3 6. .onesese<~-m4~oemm-mm.em-meees mse. i .NNmmmNoNM-NN-NNeNM---oe---ee--m-Ne t o.o. o.o.o.o.o.o.o.o. o. o. o.o. o.o. o.o. o. o. o.o. o.o.o. o. o.o.o.o.o.o. o.o. ..;g6 3 l5d: i, G . e-NNNNeeNeNe-eN-eNeeNNNe-e-e-eNeNe t 88888888888888888888888888888.88888 b j .c .W . o@4.domeMe=NNos44N@mNN. @~@m4MMMoM -G*-NNmm4mo-m-NN-NN-NN--N-v o--e---m-mN Q -. o. o. o.o. o.o.o.o.o.o.o.o. o. o. o.o. o.o. o.o. o. o. o.o. o.o. o.o. o.o. o.o. o.o. mp. E O i 0 t .-. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ o I. N G : RRRRRRRRRRRRRRERRRRRRRRERR*RRERRRR m -e.~.- -mmmes -~.- 8~..~8 mo k -m4-mm -. o-~~o--mo--mmo-~~ ~o -~mo-~~o--~ 06. %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% O l .W . -ee-NNNNMMMMmWW4wmmmm@@@c@N~~NmWWm + g l l o i i -~m4mesmoo-~m mmees.o-~m<neum.o-~m C i

~~~~~~~~~~mmmm e5 l

l

TABLE F-1 l (continued) t 1992 ANNUAL AIR SAMPLE

SUMMARY

i Weekly Gross Beta Radioactivitf in Air Particulate (b) (pci/m') i l i 7 Collect RASO.1CD site RASO.7E0 Met Tower ras 0.3ND Pit Eff Week Date site +-2S Net Tower +-2S Plt Eff +-2S [ 34 9/01/92 .023 .002 .021 .002 .016 .001 i 35 9/09/92 .032 .002 .029 .001 .033 .001 36 9/15/92 .035 .003 .034 .D03 .036 .003 i 37 9/22/92 .025 .001 .023 .001 .020 .001 l 38 9/29/92 .022 .001 .025 .001 .024 .001 39 10/D6/92 .020 .002 .014 .002 .015 .002 40 10/13/92 .059 .003 .D61 .003 .D65 .003 l 41 10/20/92 .022 .001 .026 .001 .026 .001 42 10/27/92 .024 . 002 .022 .002 .025 .002 { 43 11/02/92 .020 .001 .016 .001 .018 .001 44 11/09/92 .031 .002 .028 .002 .028 .002 l 9 45 11/16/92 .050- .002 .D61 .002 .053 .002 l l 46 11/23/92 .026 .001 .025 .001 - .025 .001 [ 47 12/01/92 .039 .001 (a) .032 .001 1 48 12/07/92 .035 .002 .029 .002 .030 .002 49 12/14/92 .014 .001 .014 .001 .011 .001 50 12/22/92 .D41 .002 .038 .002 .036 .002 f 51 12/29/92 .043 .002 .039 .002 .010 .001 4 l l kotes: l (a) Sanple not collected, air sarnpler not turned on during weekly change-out. [ i i J (b) Beginning with week 34 the number of air samplers was reduced from 8 to 3. j l 1 l t i E h 4 i r t i i I 1 i i 4 Rancho Seco F-3 1992 AREOR l

Tablo F-2 Direct Radiation (TLD), 1992 Quarterly (mram) TLD Indicator Location Control Location ID or 1992 1992 1992 1992 Number Number Special 1st Qtr 2nd Qtr 3rd Qtr 4th Qtr 0 RTL23.1QO C 9.2 (b) (b) (b) 1 RTLO.3RO I 16.8 18.0 15.6 18.5 2 RTLO.3CO I 15.7 18.3 16.5 18.0 3 RTLO.3NO I 16.8 18.1 16.4 18.6 4 RTLO.3LO I 17.2 19.1 19.2 17.4 5 RTLO.3HO I 18.3 18.4 17.3 16.4 6 RTLO.4FO I 15.7 17.0 15.6 19.7 7 RTLO.5CO I 16.4 17.5 (a) 18.9 8 RTL6.2QO C 16.5 19.4 17.6 (b) 9 RTL23.0QO C 14.5 16.3 14.4 (b) I 11 RTLO.6KO I 15.4 18.4 16.3 17.3 i 12 RTL9.0E0 C 17.6 21.3 15.6 (b) l 13 RTL10.ONO C 16.1 15.5 15.9 (b) 15 RTL10.0HO C 20.3 17.8 17.5 (b) f 16 RTL2.7MO I 14.3 15.4 14.3 14.7 l 17 RTL8.2KO C 20.8 21.8 20.1 20.6 l 18 RTL7.8CO C 18.3 16.6 14.4 15.0 19 RTL1.8FO I 16.4 17.7 15.1 16.8 l' 20 RTL1.5MO I 14.7 16.3 17.9 16.6 21 RTL1. 7LO I 15.6 16.8 16.1 (b) 25 RTL3.8LO I 15.8 18.9 15.8 (b) i 26 RTL3.9KO I 14.9 15.0 15.3 16.1 27 RTL3.6JO I 15.0 17.4 13.6 (b) 30 RTL7.4MO C 15.7 18.5 17.3 18.4 i 31 RTL3.7NO I 16.7 18.2 20.1 17.6 32 RTL4.8PO I 16.0 18.0 16.2-(b) j 33 RTL3.8MO I 16.4 18.2 16.6 16.0 l 34 RTL3.8QO I 17.5 17.9 18.7 (b) i 35 RTL1.9NO I' 18.3 20.7 (a) 20.0 l 43 RTL1.7GO I 14.5 19.6 14.5 15.4 44 RTL1.3FO I 14.7 20.9 14.3 (b) l 45 RTL1.8EO I 15.9 17.7 15.0 (b) l 46 RTL1.4DO I 17.1 19.7 18.7 20.4 48 RTL3.7DO I 18.9 21.1 21.1 (b) r i 1 l 1 l Rancho Seco F-4 1992 AREOR

~ Tablo F-2 ~ (Continued) Direct Radiation (TLD), 1992 Quarterly (area) TLD Indicator Location Control Location ID or 1992 1992 1992 1992 Number Number Special 1st Qtr 2nd Qtr 3rd Qtr 4th Qtr l i 51 RTL10.0E0 C 13.9 16.4 19.3 (b) l 52 RTL19.0E0 C 26.2 23.5 21.0 (b) l 53 RTL12.0GO C 20.7 21.1 18.8 (b) l 55 RTL8.0PO C 15.9 17.1 15.6 16.7 l 56 RTL4.6QO I 16.2 17.1 21.0 (b) 63 RTLO.8DO T 16.3 17.0 16.2 16.5 65 RTLO.6MO I 15.3 16.2 14.1 14.8 [ 66 RTLO.4NO S 40.1 42.5 46.6 45.5 l 67 RTLO.4NO1 S 18.9 20.5 18.7 18.4 i 68 RTLO.3PO I 21.1 21.7 16.2 17.7 70 RTLO.2PO S 17.8 20.4 (b) (b) 72 RTLO.2PO1 S 16.7 19.6 (b) (b) j l 73 RTLO.2PO2 S 16.9 20.9 (b). (b) 74 RTLO.2PO3 S 22.8 26.5 (b) (b) i 75 RTLO.2PO4 S 19.5 22.3 (b) (b) 76 RTLO.2POS S 18.3 21.7 (b) (b) 77 RTLO.2PO6 S 17.6 18.7 (b) (b) 78 RTLO.2PO7 S 17.5 19.4 (b) (b) 79 RTLO.2PO8 S 22.9 18.5 (b) (b) [ 80 RTLO.2PO9 S 15.7 19.6 (b) (b) 81 RTLO.2PO10 S 15.2 16.9 (b) (b) j 82 RTLO.2PO11 S 22.1 18.6 (b) (b) l 83 RTLO.2PO12 S 18.0 18.2 (b) (b) 84 RTLO.1MP S (c) (c) 17.0 18.8 l 85 RTLO.1LP S (c) (c) 15.9 22.5 i 86 RTLO.2LP S (c) (c) 16.9 19.8 87 RTLO.2MP S (c) (c) 18.9 20.6 ._______________== ? Notes: l (a) TLD missing from location at change-out { (b) Location inactivated j (c) New location added at 3rd quarter l l i 1 I l i t l Rancho Seco F-5 1992 AREOR l \\. I i . ~..

TABLE F-3 Garden Vegetables, 1992 (Pci/kg, wet) Sanple Collection Mn-54 Co-58 Fe-59 Co-d o Zn-65 Zr/Nt>-95 I-131 Cs-134 Cs-137 Ba-140 ID Location Nsume Type Date La-140 RLVO.5A0 site Garden North (Broadteaf #1) Cabbage 4/09/92 <54 <52 <105 <55 <122 <52 <60 <53 <58 <204 RLVO.6MO Irrigated Garden Vegetable Mustard Greens 4/09/92 <54 <54 <117 <55 <128 <58 <60 <51 <59 <217 RLV18.0KO Lodi Produce (Broedteaf #3) Lettuce 4/09/92 <56 <55 <110 <49 <119 <55 <60 <51 <55 <221 RLV18.0KO Lodi Produce (Broadteaf #1) Spinach 4/15/92 <51 <51 <123 <55 <110 <52 <60 <51 <54 <198 RLV18.0KO Lodi Produce (Broadleaf #2) Red onions 4/15/92 <53 <52 <109 <67 <122 <64 a60 <47 <60 <205 RLV18.0KO Lodi Produce (Broadleaf #3) Asparagus 4/15/92 <51 <53 <102 <50 <112 <54 <58 <47 <58 <202 RLV18.0KO Lodi Produce (Vegetable) Sugar Peas 4/15/92 <59 <52 <124 <63 <128 <54 <60 <49 <57 <198 RLVO.5A0 site Garden North (Brosdteaf #1) Broccoli 6/04/92 <47 <46 <102 <48 <139 <53 <60 <43 <49 <205 RLVO.5A0 site Garden North (Broadleaf #2) Collard Greens 6/04/92 <39 <39 <83 <44 <93 <44 <60 <36 <39 <186 RLVO.5A0 site Garden North (Broadleaf #3) Celery 6/04/92 <206 <207 <418 <218 <451 <223 <324 <186 <217 <1014 RLVO.540 Site Garden North (Broadleaf #3) Rhubarb 6/04/92 <41 <40 <90 <41 <92 <45 <67 <39 <43 <206 RLVO.6MO trrigated Garden Vegetable Beets 6/04/92 <42 <41 <89 <46 <93 <45 <60 <39 <43 <193 RLVO.6MO trrigated Garden Vegetable Greens 6/04/92 <48 <42 <85 <43 <102 <43 <60 <41 <42 <181 RLVO.6HO trrigated Garden Vegetable Rhubarb 6/04/92 <67 <66 <136 <T2 <152 <70 <92 <61 <70 <297 RLVO.6MO frrigated Garden Vegetable Onions 6/04/92 <37 <37 <78 <40 <87 <41 <60 <40 <41 <178 RLV18.0KO Lodi Produce (Broadleaf #1) Scallops 6/04/92 <35 <36 <77 <36 <79 <40 <59 <34 <41 <176 RLV18.0KO Lodi Produce (Broadleaf #2) Asparagus 6/04/92 <55 <47 <105 <66 <89 <49 <58 <50 <61 <278 RLV18.0KO Lodi Produce (Broadteaf #3) Celentro 6/04/92 <37 <37 <B5 <40 <89 <38 <59 <33 <35 <179 RLV18.0KO Lodi Produce (Vegetable) Cucwber 6/04/92 <45 <42 <109 <50 <82 <43 <59 <44 <50 <212 I l Rancho Seco F-6 1992 AREOR

TABLE F-4 RAW MILK, 1992 l [ Angelo Dairy j RMFS.2KO l Weekly Indicator j (Pci/L) t -=

== -............................................ = coltectinn Zr-95 Date nri-54 Co-58 Fe-59 Co-60 2n-65 ub-95 I-131 Cs-134 Cs-137 8a/La-140 .... = =__=......- ____=.............- 1/07/92 <5 <5 <10 <5 <11 <5 <0.5 <4 <5 <20 j 1/14/92 <4 <4 <8 <4 <8 <4 <0.4 <3 <4 <15 I 1/21/92 <6 <6 <13 <6 <13 <6 <0.4 <5 <6 <23 1/28/92 <6 <7 <14 <7 <14 <6 <0.4 <6 <7 <27 l 2/04/92 <9 <8 <19 <11 <21 <9 <0.6 <8 <10 <34 l 2/11/92 <5 <5 <11 <6 <13 <6 <0.5 <5 <6 <23 2/18/92 <12 <11 <29 <12 <25 <13 <1.0 <11 <13 <50 r 2/25/92 <6 <6 <12 <6 <14 <6 <0.4 <5 <6 <22 3/03/92 <3 <3 <7 <4 <8 <3 <0.8 ' <3 <4 <18 l 3/10/92 <7 <7 <14 <7 <15 <7 <0.6 <6 <7 <27 1 3/17/92 <7 <7 <15 <7 <18 <7 <0.6 <7 <7 c29 3/24/92 <12 <10 <22 <14 <28 <12 <0.5 <12 <12 <44 [ 3/31/92 <6 <6 <13 <7 <14 <6 <1.1 <6 <7 <25 j 4/07/92 <7 <7 <14 <6 <15 <7 <0.7 <6 <7 <27 4/14/92 <6 <6 <14 <6 <13 <6 <0.6 <6 <6 <25 4/21/92 <6 <5 <12 <7 <13 <6 <1.3 <5 <6 <22 4/28/92 <5 <5 <12 <6 <13 <6 <0.6 <5 <6 <22 5/06/92 <6 <6 <12 <7 <13 <6 <7 <5 <6 <24 5/12/92 <6 <6 <12 <6 <13 <6 <7 <5 <6 <23 l { 5/19/92 <3 <3 <7 <3 <7 <3 <6 <3 <3 <16 5/26/92 <6 <6 <14 <7 <15 <6 <8 <6 <7 <27 6/02/92 <6 <6 <13 <6 <13 <6 <8 <6 <6 <25 { 6/09/92 <5 <5 <12 <6 <12 <6 <7 <5 <6 <22 6/16/92 <5 <5 <11 <6 <12 <5 <7 <5 <5 <21 6/23/92 <5 <S <11 <5 <12 <5 <5 <4 <5 <19 i 6/30/92 <4 <4 <9 <5 <10 <4 <6 <4 <5 <19 [ 7/07/92 <5 <5 <10 <5 <11 <5 <6 <4 <5 <21 7/14/92 <5 <5 <11 <6 <12 <5 <7 <5 <5 <22 7/21/92 <4 <5 <15 <4 <10 <9 <142 <4- <4 <133 i 7/28/92 <4 <4 <8 <4 <8 <4 <5 <3 <4 <16 8/04/92 <8 <B <18 <8 <19 <9 <12 <7 <9 <38 8/11/92 <7 <7 <14 <7 <15 <7 <9 <6 <7 <29 ? 8/18/92 <4 <4 <8 <4 <9 <4 <5 <4 <4 <17 I i i I l 1 l l Rancho Seco F-7 1992 AREOR l k y., ew,, n

t TABLE F-4 I (Continued) l RAW MILK, 1992 l Marcial Ranch RMF0.8DO Weekly Indicator 3 (Pci/L) ........................................... = -- --- =......... Cottection Ir-95 pate mi-54 Co-58 Fe-59 Co-60 Zrt-65 utr-95 1-131 Cs-134 Cs-137 Ba/La-140 1 1/07/92 <7 <7 <15 <8 <16 <7 <0.5 <7 <7 <28 1/14/92 <3 <3 <7 <4 <8 <8 <0.4 <3 <3 <13 1/21/92 <6 <7 <14 <7 <16 <7 <0.6 <6 <7 <26 I 1/28/92 <6 <6 <13 <7 <14 <6 <0.4 c5 <7 <25 1 I 2/04/92 <7 <7 <17 <8 <18 <8 <0.5 <7 <8 <29 2/11/92 <6 <6 <12 <7 <14 <6 <n.4 <o <7 <26 2/18/92 <t2 <12 <24 <15 <30 <13 <1.1 <12 <12 <55 2/25/92 <6 <6 <13 <6 <14 <6 <0.4 <5 <6 <24 3/03/92 <7 <7 <15 <7 <17 <7 <0.9 <6 <7 <28 3/10/92 <6 <6 <13 <6 <14 <6 <0.6 <5 <6 <24 3/17/92 <6 <6 <13 <7 <15 <6 <0.6 <6 <7 <25 3/24/92 <5 <5 <12 <8 <12 <5 <0.6 <7 <7 <28 [ 3/31/92 <7 <7 <15 <8 <16 <7 <0.8 . <6 <B <29 j 4/07/92 <5 <5 <11 <5 <12 <5 <0.6 <5 <5 <21 4/14/92 <6 <6 <12 <6 <14 <6 <0.7 <5 <6 <24 4/21/92 <6 <6 <13 <7 <14 <6 <0.6 <6 <6 <24 i 4/28/92 <6 <6 <12 <7 <13 <6 <0.7 <6 <6 <24 j 5/06/92 <4 <4 <8 <4 <B <4 <5 <3 <4 <16 i 5/12/92 <6 <6 <12 <6 <13 <6 <7 <5 <6 <23 5/19/92 <3 <3 <7 <3 <7 <3 <6 <3 <3 <17 i 5/26/92 <7 <6 <13 <7 <13 <6 <8 <6 <7 <26 i i 6/02/92 <6 <5 <11 <6 <13 <6 <7 <5 <6 <23 f 6/09/92 <6 <6 <14 <7 <14 <6 <B <6 .T <24 6/16/92 <6 <6 <13 <6 <13 <6 <7 <5 <6 <24 i 6/23/92 <5 <5 <12 <6 <12 <5 <7 <5 <6 <23 j 6/30/92 <3 <3 <7 <4 <8 <4 <5 <3 <3 <13 \\ 7/07/92 <5 c5 <10 <5 <11 <5 <6 <4 <5 <20 l 7/14/92 <6 <6 <12 <6 <13 <5 <7 <5 <6 <23 j 7/21/92 <3 <4 <8 <4 <8 <4 <6 <3 <4 <16 7/28/92 <4 <4 <B <4 <9 <4 <5 <4 <4 <17 8/04/92 <6 <6 <13 <6 <13 <6 <7 <5 <6 <24 8/11/92 <6 <6 <13 <6 <14 <7 <8 <6 <7 <27 i 8/18/92 <4 <4 <9 <4 <10 <4 <6 <4 <4 <18 1 I Rancho Seco F-8 1992 AREOR i

i l 007LBLE IP-4 ) (Continued) RAW MILK, 1992 Maderios Dairy RMF5.8PO Weekly Indicator (PCi/L) Collection Zr-95 Date wn-54 co-58 Fe-59 co-60 zn-65 utr95 I-131 cs-134 cs-137 sa/La-140 =.................. 1/07/92 <6 <6 <13 <6 <13 <6 <0.5 <5 <6 <24 1/14/92 <7 <7 <16 <7 <17 <8 <0.4 <7 (8 <29 1/21/92 <6 <5 <12 <6 <13 c5 <0.4 <5 <6 <22 1/28/92 <5 <5 <11 <5 <12 <6 <0.6 <5 <6 <23 2/D4/92 <B <7 <16 (8 <17 <8 <0.6 <7 <9 <30 2/11/92 <3 <3 <7 <3 <7 <3 <0.7 <3 c4 <13 2/18/92 <12 <12 <25 <12 <29 <11 <0.6 <11 <13 <46 2/25/92 <B <B <17 <B <18 <8 <0.5 <7 <8 <32 3/03/94 <B <B <17 <8 <19 <8 <0.9 <7 <B <31 3/10/92 <4 <4 <10 <5 <10 <5 <0.6 <4 <5 <18 3/17/92 <7 <7 <15 <7 <17 <7 <0.6 <6 <7 <27 3/24/92 <12 <12 <27 <12 <30 <13 <0.5 <11 <12 <46 3/31/92 <3 <3 <7 <4 <7 <3 <0.8 </ <3 <18 4/07/92 <5 <5 <11 <5 <11 <5 <0.7 <4 <5 <21 4/14/92 <7 <7 <14 <7 <15 <7 <0.6 <6 <7 <27 4/21/92 <6 <6 <13 <6 <14 <6 <0.6 <6 <6 <26 4/21/92 <8 <7 <16 <7 <18 <8 <0.6 <7 <8 <30 4/28/92 <6 <6 <12 <7 <13 <7 <0.8 <6 <7 <26 5/06/92 <6 <6 <12 <6 <13 <6 <7 <5 <6 <24 5/12/92 <6 <5 <11 <6 <12 <5 <7 <5 <6 <23 5/12/92 <6 <6 <12 <6 <13 <6 <8 <6 <6 <24 5/19/92 <3 <3 <7 <4 <7 <4 <6 <3 <3 <18 5/26/92 <3 <3 <6 <3 <7 <3 <5 <3 <3 <14 6/02/92 <5 <5 <12 <6 <13 <6 <7 <5 <6 <24 6/09/92 <5 <5 <11 <5 <11 <5 <6 <5 <5 <20 6/16/92 <5 <5 <12 <6 <13 <5 <7 <5 <6 <23 6/23/92 <7 (6 <14 <7 <16 <7 <8 <6 <7 <27 6/30/92 <5 <5 <12 <6 <12 <5 <6 <5 <5 <22 7/07/92 <6 <6 <12 <7 <13 <6 <7 <6 <6 <24 7/14/92 <3 <3 <7 <3 <7 <3 <5 <3 <3 <15 7/21/92 <3 (4 <8 <4 <B <4 <6 <3 <4 <17 7/28/92 <4 <4 <8 <4 <8 <4 <5 <3 <4 <16 8/D4/92 <3 <3 <7 <3 <7 <3 <5 <3 <3 <14 8/11/92 <8 <9 <20 <9 <20 <10 <22 <8 <9 <60 8/18/92 <4 <4 <B <4 <8 <4 <5 <3 (4 <16 l 8/25/92 <4 <4 <8 <4 <9 <4 c5 <4 <4 <16 l 9/22/92 <4 (4 <8 <4 <B <4 <8 <3 <4 <20 ) 10/21/92 <8 <9 <20 <8 <19 <10 <25 <7 <8 <60 11/23/92 <4 <4 <8 <4 <8 <4 <B <3 c4 <21 12/22/92 <T <B <18 <8 <17 <9 <28 <7 <B <57 l Rancho Seco F-9 1992 AREOR l l i t

l TABLE F-4 ~ (Continued) RAW MILK, 1992 DeSnayer Dairy l RMF24.OLO i Weekly Control (PCi/L) { 'f coltaction Ir-95 Date nn-54 Co-58 Fe-59 Co-60 2n-65 Mb-95 I-131 CS-134 Cs-137 Ba/La-140 I .=- -=.........................................................=-- 1/07/92 <6 <6 <12 <6 <S <6 <0.7 <5 <6 <24 i 1/14/92 <5 <5 <10 <5 <11 <5 <0.4 <4 <5 <21 1/21/92 <5 <6 <12 <6 <12 <6 <0.5 <5 <6 <22 l 1/28/92 <6 <6 <13 <7 <15 <6 <0.5 <6 <7 <25 l 2/04/92 <11 <10 <25 <12 <23 <11 <0.8 <10 <12 <44 2/11/92 <6 <7 <14 <7 <16 <7 <0.4 <6 <7 <27 2/18/?2 ett <12 <29 <15 <28 <13 <0.6 <12 <15 <57 l 2/25/92 <6 <6 <12 <6 <14 <6 <0.4 <6 <6 <24 ) t 3/03/92 <7 <7 <14- <7 <15 <7 <1.8 <6 <7 <28 3/10/92 <5 <5 <10 <5 <11 <5 <0.6 <5 <5 <21 3/17/92 <8 <8 <16 <8 <18 <8 <0.6 <7 <8 <31 i 3/24/92 <12 <12 <25 <14 <16 <13 <0.5 <13 <13 - <51 3/31/92 <3 <3 <6 <4 <7 <3 <0.8 <3 4 <18 i 4/07/92 <4 <4 <9 <5 <10 <4 <1.1 <4 4 <18 4/14/92 <5 <5 <11 <5 <12 <5 <0.8 <5 <5 <22 l 4/21/92 <7 <7 <15 <7 <16 <7 <0.8 <6 <7 <26 4/28/92 (a) [ E 5/06/92 <6 <6 <12 <6 <13 <6 <7 <5 <6 <23 5/12/92 <5 <5 <12 <6 <12 <6 <7 <5 <6 <23 i 5/19/92 <6 <12 <26 <12 <28 <13 <20 <10 <12 <60 i 5/26/92 4 4 <8 <4 <8 <4 <6 <3 <3 <17 6/02/92 <5 <5 <11 <6 <12 <5 <6 <5 <6 <22. i 6/09/92 <3 <3 <7 <3 <B <3 <5 <3 <3 <15 l 6/16/92 4 <4 <8 <4 <9 <4 <7 <3 <4 <20 l 6/23/92 <5 <5 <11 <5 <11 <5 <7 <5 <6 <21 i 6/30/92 <4 <4 <9 <5 <10 <4 <6 <4 <5 <18 i 7/07/92 <6 <6 <13 <6 <13 <6 <7 <5 <6 <23 7/14/92 <7 <7 <14 <8 <15 <7 <8 <6 <7 <28 7/21/92 <4 <4 <8 <4 <S 4 <5 <3 4 <16 7/28/92 <3 <3 <7 <3 <7 <3 <5 <3 <3 <15 l 8/04/92 <3 <4 <8 ' <4 (B <4 <6 <3 4 <17 l 8/11/92 <3 <3 <7 <3 <7 <3 <5 <3 <3 <14 i 8/18/92 4 4 <8 <4 <8 4 <5- <3 4 <17 'l 1 Notes: (a) Sanple lost by vendor (CEP) daring analysis f 1 l Rancho Seco F-10 1992 AREOR t l l i <a e n .-w

-. _ _ = t TABLE F-4 l (Continued) 1 ( RAW MILK, 1992 i l i Maderios Dairy RMF5.8POQ i Weekly / Quarterly Quality control (PCi/L) _ _-............= Collection Zr-95 Date swi-54 Co-58 Fe-59 Co-60 2n-65 ub-95 I-131 Cs-134 Cs-137 Ea/La-140 1/07/92 <7 <7 <15 <7 <16 <7 <0.5 c6 <7 <27 1/14/92 <5 <5 <12 <6 <12 <6 <0.4 <5 <6 <23 1/21/92 <6 <6 <13 <6 <13 <6 <0.6 <5 <6 <24 i 1/28/92 <6 56 <12 <7 <13 <6 <0.4 <5 <6 <24 2/04/92 <10 <9 <21 <10 <20 <8 <0.9 <8 <9 <34 2/11/92 47 <7 <15 <8 <15 <8 <0.4 47 <8 <32 2/18/92 <14 <13 <25 <15 <28 <12 <1.0 <13 <12 <54 2/25/92 <7 <7 <15 <7 <16 <7 <0.5 <6 <7 <27 3/03/92 <6 <6 <13 <7 <14 <6 <1.0 <6 <7 <25 3/10/92 <8 <8 <17 <8 <18 <8 <0.6 <7 <8 <33 3/17/92 <6 <6 <13 <6 <14 <6 <0.6 <6 <6 <24 3/24/92 <5 <5 <12 <7 <11 <6 <0.4 <6 <7 <31 3/31/92 <6 <6 <13 <7 <14 <6 <1.2 <5 <6 <23 l i 4/07/92 <6 <6 <12 <7 <13 <6 <0.8 <5 <6 <24 4/14/92 <f <6 <12 <6 <13 <6 <0.6 <5 <6 <23 4/21/92 <8 <7 <16 <7 <18 <8 <0.6 <7 <8 <30 4/28/92 <5 <5 <11 <6 <12 <6 <1.3 c5 <6 <22 5/06/92 <5 <5 <11 <5 <11 <5 <7 <5 <6 <22 7 5/12/92 <6 <5 <11 <6 <12 <5 <7 <5 <6 <23 5/19/92 <7 <7 <16 <7 <15 <8 <12 <6 <7 <36 5/26/92 <3 <3 <7 <3 <7 <3 <5 <3 <3 <15 6/02/92 <5 <5 <10 <5 <11 <5 <7 <5 c5 <21 1 6/09/92 <3 <3 <7 <3 <7 <3 <4 <3 <3 <14 i 6/16/92 <4 <4 <8 <4 <9 <4 <5 <4 <4 <16 i 6/23/92 <15 <14 <31 <14 <34 <16 <18 <13 <15 <60 l 6/30/92 <4 <4 <9 <4 <9 <4 <5 <4 <4 <17 j a 7/07/92 c6 <6 <13 <7 <14 <6 <7 <6 <7 <25 i 7/14/92 <5 <5 <12 <6 <13 <6 <7 <5 <6 <23 i 7/21/92 <4 <4 <8 <4 <9 <4 <5 c4 <4 <17 7/28/92 <3 <3 <7 <3 <7 <3 <4 <3 <3 <14 l I 8/04/92 0 <3 <7 <3 <7 <3 <5 <3 <3 <15 ? l 8/11/92 <8 <8 <18 <8 <19 <9 <11 <7 <9 <36 l 8/18/92 <4 <4 <8 <4 <8 <4 <6 <3 <4 <17 I 8/25/92 <4 <4 <9 <4 <9 <3 <5 <4 <4 <17 i 11/23/92 <6 <7 <16 <6 <14 <8 <30 <6 <7 <57 i i l I I i Rancho Seco F-11 1992 AREOR l

TABLE F-5 SOIL AND SEDIMENT (Mud and Silt), 1992 Quarterly / semi-annual (Pci/kg) saapte Coltection Cs-137 10 Class Description of Location Date Mn-54 Co-58 Fe-59 Co-60 Zn-65 Zr/Ntr95 1-131 Cs-134 Cs-137 +-2s se/La-140 RSLO.2M01 IND Storm Drain #1 2/03/92 <82 <99 <256 <76 <195 <144 <1114 <69 <78 <1521 RSLO.2HO2 IND Storm Drain #2 2/03/92 <30 <36 <94 <29 <71 <52 <388 <26 <28 <525 RSLO 2Jo IND Storm Drain #3 2/03/92 <162 <2% <T22 <134 <350 <512 <19720 <148 <164 <11226 RSLO.2KO IND Storm Drain #4 2/03/92 <127 <225 <511 <185 <428 <397 <17807 <128 <176 <10826 RSLO.3Lo IND Storm Drain #5 2/03/92 <185 <255 <748 <170 <488 <505 <18486 <149 <165 <11909 R$LO.2HO IND Storm Drain #6 2/03/92 <58 <71 <198 <59 <139 <111 <1237 <49 79 36 <1402 RSLO.3M07 IND Storm Drain #7 2/03/92 <199 <258 <595 <171 <511 <511 <20978 <147 <175 <12690 RSLO.3M08 IND Storm Drain #8 2/03/92 <172 <232 <823 <195 <341 <493 <20041 <137 <176 <11652 RSLO.3M09 IND Storm Drain #9 2/03/92 <176 <302 <787 <147 <391 <416 <22674 <133 <177 <12040 RSLO.300 IND Storm Drain #10 2/03/92 <185 <283 <834 <152 <470 <523 <19339 <149 <170 <13012 j 'RSLO.380 IND Storm Drain #11 2/03/92 <171 <280 <711 <171 <386 <477 <16977 <150 <174 <11533 RSLO.340 IND Storm Drain #12 2/03/92 <168 <281 <856 <156 <393 <462 <15885 <132 <154 <11171 QSLO.6MO IND Site Boundary 2/03/92 <185 <269 <784 <167 <447 <509 <19155 <150 <177 <12366 RSLO.7No IND Silva Ranch (Water Smp) .2/03/92 <174 <245 <753 <166 <380 <465 <19557 <149 <153 <10259 RSL1.5NO IND Silva Ranch 2/03/92 <201 <267 <870 <178 <441 <549 <20297 <149 <170 <13668 RSLI.8NO IND Hadselville/ Clay Creeks 2/03/92 <154 <220 <687 <183 <390 <359 <13842 <147 <179 <9263 RMSO.6MO IND Site Boundary 2/19/92 <55 <60 <145 <63 <137 <74 <219 <51 267 67 <485 030.7No IND Water Sump 2/19/92 <66 <70 <166 <64 <149 <86 <223 <57 358 65 <528 RQSt.8No IND Clay and Madselvllte Creeks 2/19/92 <43 <48 <120 <53 <100 <56 <140 <40 814 65 <339 RQS3.7NO IND Laguna Creek at Folsom S. Canal 2/19/92 <83 <88 <211 <81 <198 <110 <282 <69 82 65 <657 RQSO.3MO IND Effluent Discharge 2/19/92 <39 <42 <96 <43 <86 <52 <155 <35 <43 <330 RQSO.3MO IND Effluent Discharge 5/20/92 <65 <65 <142 <66 <150 <T4 <114 <56 378 59 <335 RQSO.6MO IND Site Boundary 5/20/92 <37 <37 <81 <47 <82 <41 <T1 <35 314 41 <200 l L k Rancho Seco F-12 1992 AREOR J b

TABLE F-5 (Continund) SOIL AND SEDIMENT (Mud and Silt), 1992 Quarterly / Semi-annual (Pci/kg) Sasple Collection Co-60 Cs-137 13 Class Description of Location Date Mn-54 Co-58 Fe-59 Co-60 +-25 2n-65 Fr/utr95 I-131 Cs-134 Cs-137 +-25 Ba/Lo-140 RSLO.2M01 IND Storm Drain #1 8/10/92 <50 <45 <112 <50 <113 <58 <85 <41 138 48 <254 RSLO.2N02 IND Storm Drain #2 8/10/92 <32 <30 <T5 <34 < 72 <39 <68 <27 53 24 <172 RSLO.2Jo IND Sto.1n Drain #3 8/10/92 <27 <26 <62 <29 <61 <34 <56 <24 <28 <158 RSLO.2KO IND Storm Drain #4 8/10/92 <46 c47 <108 <47 <110 <54 <89 <40 125 45 <253 RSLO.3LO IND Storm Drain #5 8/10/92 <43 <43 <102 <42 <105 <51 <81 <37 51 31 <233 RSLO.2MO IND Storm Drain #6 8/10/92 <120 <143 <391 <158 <362 <194 <367 <147 <123 <846 RSLO.3M07 IND Storm Drain #7 8/10/92 <164 <132 <307 <152 <314 <176 <296- <112 <176 <860 RSLO.3M08 IND Storm Drain #8 8/10/92 <51 <50 <116 <55 <119 <60 <99 <45 154 45 <278 RSLO.3409 IND Storm Drain #9 8/10/92 <54 <55 <120 <54 <132 <60 <95 <47 122 49 <269 R$LO.300 IND Storm Drain #10 8/10/92 <39 <37 <81 <38 <88 <44 <57 <32 <39 <170 RSLO.3No IND Storm Drain #12 8/10/92 <28 <28 <65 <32 <63 <35 <58 <25 <30 <152 RSLO.3A0 IND North site Garden 8/10/92 <40 <39 <92 <40 <98 <46 <67 <34 <27 <202 RSLO.6MO IND Site Boundary 8/10/92 <46 <42 <87 149 45 <93 <49 <76 <40 874 55 <219 KSLO.7NO IND Silva Ranch (water sump) 8/10/92 <55 <56 <123 <56 <131 <65 <?3 <50 93 57 <286 RSLt.5NO IND Silva Ranch 8/10/92 <141 <188 <299 <207 <313 <192 <321 <116 301 231 <T85 l RSL1.8NO IND Madselville / Clay Creeks 8/10/92 <38 <37 <89 116 36 <89 <46 <80 <37 1034 63 <215 KM30.3MO IND Effluent Discharge 9/03/92 <18 <18 <43 43 19 <42 <22 <54 15+/-9 587 25 <126 KMSO.6Mo IND Site Boundary 9/03/92 <27 <28 <66 <29 <63 <35 <74 <29 174 28 <186 R;;SO.7NO IND Water Sunp 9/03/92 <14 <14 <31 53 14 <32 <l7 <37 28+/-10 87 3 <95 KMSt.BNO IND Madselville / Clay Creeks 9/03/92 <32 <34 <81 <34 <78 <42 <92 <29 739 40 <228 KMS3.7NO IND Folsom South Canal 9/03/92 <12 <12 <29 <13 <29 <15 <29 <11 219 16 <77 RSL1.8N01 IND Madselville/ Clay Creeks; resmple 9/22/92 <131 <138 <328 504 160 <359 <155 <405 <146 3484 301 <1001 RSL1.8N02 IND Madselville/ Clay Creeks; resmple 9/22/92 <157 <131 <374 <232 <337 <160 <386 <149 1910 258 <956 R;;SO.3MO IND Effluent Discharge 11/23/92 <15 <16 <39 200 19 <35 <24 <107 37+/-10 1438 28 <189 RXSO.6MO IND Site Boundary 11/23/92 <29 <32 <T9 <30 <T1 <43 <139 <26 257 30 <274 Rancho Seco F-13 1992 AREOR

TABLE F-6 FISH, 1992 Quarterly / semi-annual (Pci/kg, wet) Predstor Sample or Cottection Cs-137 ID Class Description of Location Scavenger Date m-54 Co-58 Fe-59 Co-60 Zn-65 2r/ub-95 I-131 Cs-134 Cs-137 +-25 sa/Le-140 RFS1.5F01 CON Rancho Seco Reservoir Predator 3/25/92 <26 <26 <87 <30 <67 <41 <137 <30 <31 <287 RFSt.5F01 CON Rancho seco Reservoir Predator 3/25/92 <88 <97 <198 <82 <232 <158 <431 <79 <111 <631 RFSt.5F02 CON Rancho Seco Reservoir Scavenger 3/25/92 <108 <117 <260 <100 <248 <145 <405 <97 <111 <908 RFSO.7N01 INO Water Sump Predator 3/27/92 <110 <108 <260 <113 <246 <139 <334 <103 264 87 <764 RFSO.7N02 IND Water surp Scavenger 3/27/92 <108 <115 <259 <105 <227 <141 <359 <108 187 95 <849 RFSO.3M01 IND Effluent Discharge Predator 6/25/92 <76 <90 <234 <100 <235 <115 <532 <T5 <105 <1207 RFSO.6M01 IND Site Boundary Scavenger 6/25/92 <92 <105 <247 <105 <256 <145 <697 <T8 <100 <1257 QFSO.6M02 IND Site Boundary Predator 6/25/92 <71 < T4 <238 <98 <207 <100 <562 <61 <113 <963 RFS1.5F01 CON Rancho Seco Reservoir Predator 6/30/92 <89 <103 <257 <91 <208 <122 <408 <86 <106 <824 RFS1.5F02 CON Rancho Seco Reservoir Scavenger 6/30/92 <600 <684 <1523 <568 <1388 <833 <2747 <538 <615 <5778 RFSO.3M01 IND Effluent Discharge Predator 12/14/92 <109 <95 <249 <108 <224 <107 <205 <89 <107 <534 RFSO.3M02 IND Effluent Discharge Scavenger 12/14/92 <121 <116 <258 <121 <258 <137 <225 <112 <122 <657 RFSO.6M01 IND Site Boundary Predator 12/14/92 <123 <i22 <259 <117 <249 <118 <202 <98 <117 <555 RFSO.6M02 IND Site Boundary Scavenger 12/14/92 <115 <119 <258 <129 <252 <129 <213 <100 81 100 <585 Rancho Seco F-14 1992 AREOR

TABLE F-7 ALGAE, 1992 Semi-annually (Pci/kg, wet) Sample Collection Cs-137 13 Class Description of Location Date Mn-54 Co-58 Fe-59 Co-60 2n-65 Zr/wb-95 1-131 Cs-134 Cs-137 +-2s Ba/La-140 CAGO.3MO IND Effluent Olscharge 3/04/92 <166 <221 <604 <183 <413 <386 <6603 <149 <178 <5913 RAGO.6MO IND !!te Bomdary 3/04/92 <176 <235 <694 <162 <397 <364 <5494 <149 <155 <5870 CAGO.7No IND Water SuFp 3/04/92 <189 <260 <T02 <177 <460 <412 <6715 <159 <178 <6312 RAG 1.BNO IND Clay / Madselville Creeks 3/04/92 <181 <241 <661 <176 <438 <391 <6312 <150 <175 <6108 _ 136 <6182 RAG 10.0No IND Laguna Creek at McKenzie Road 3/04/92 <145 <196 <556 <151 <331 <340 <T472 <135 RAG 94.0MO IND Laguna Creek at Twin Cities Road 3/04/92 <208 <278 <790 <206 <503 <443 <T746 <198 <201 <7267 QQG3.7No IND Laguna Creek at Folsom South Canal 3/04/92 <162 <215 <586 <148 <351 <335 <5724 <150 <154 <5423 RAGO.3MO IND Effluent Discharge 9/03/92 <43 <44 <100 <43 <93 <52 <116 <36 <45 <287 RAGO.6MO IND Site Boundary 9/03/92 <59 <63 <141 <62 <143 <76 <179 <52 113 49 <442 CAGO.7NO INO Water Sump 9/03/92 <42 <42 <94 <43 <93 <51 <113 <37 <44 <286 CAG1.8NO IND Hadselville / Clay Creeks 9/03/92 <21 <22 <48 <23 <47 <25 <60 <20 50 18 <146 CAG3.7NO IND Folsom South Canal 9/03/92 <21 <22 <51 <22 <47

2 -

<T2 <20 21 17 <162 Rancho Seco F-15 1992 AREOR

TABLE F-G l Well Water, 1992 Quarterly I l (pci/L) l l Susple Collection een-54 Co-58 Fe-59 Co-60 2n-65 Zr,Nb-95 1 131 Cs 134 Cs-137 se,La-140 Trititan ID Class Description of Location Date RWO.3E0 IND site Welt 1/02/92 <4 <4- <9 <5 <9 <4 <0.7 <4 <4 <18 <791 R W0.8DO CON Marciel Ranch 1/02/92 <3 <3 <6 <3 <6 <3 <0.7 <3 <3 <13 <785 RWO.8L IND Clay Cattle Feed Lot 1/02/92 <3 <3 <7 <3 <7 <4 <0.7 <3 <3 <15 <815 RW2.1M IND Clay Area Well(Tippling's) 1/02/92 <6 <6 <12 <5 <12 <6 <u.7 <5 <6 <24 <T85 RW3.7MO IND Silva Feed Lot 1/02/92 <6 <6 <13 <6 <14 <7 <0.6 <5 <6 <28 <T82 RWWO.3E0 IND Site Well 3/30/92 <6 <6 <12 <7 <13 <7 <0.6 <6 <7 <26 <T33 RWO.8DG CON Marciel Ranch 3/30/92 <1 <1 <3 <2 <3 <1 <0.6 <2 <2 <8 <T38 KWO.8LO IND Clay Cattle Feed Lot 3/30/92 <6 <6 <12 <6 <13 <6 <0.6 <5 <6 <23 <727 KW2.1MO IND Clay Area Well(Tippling's) 3/30/92 <6 <6 <13 <7 <15 <6 <0.7 <5 <6 <23 <706 KW3.7M0 IND Silva Feed Lot 3/30/92 <5 <5 <11 <6 <12 <6 <0.6 <5 <5 <22 <T27 RWO.3E0 IND Site Well 6/25/92 <3 <3 <6 <3 <6 <3 <5 <3 <3 <14 <852 RWO.8DO CON Marciel Ranch 6/25/92 <9 <8 <18 <9 ' <19 <9 <13 <8 <9 <39 <836 KWO.8LO IND Clay Cattle feed Lot 6/25/92 <3 <3 <7 <4 <7 <4 <5 <3 <4 <16 <858 'K W2.1Mo IND clay Aren Well(Tippling's) 6/25/92 <3 <3 <6 <3 <6 <3 <4 <3 <3 <14 <845 KW3.7MO IND Silva Feed Lot 6/25/92 <3 <3 <6 <3 <7 <3 <5 <3 <3 <14 <852 RWO.3E0 IND 5fte Welt 9/22/92 <2 <3 <6 <3 <7 <3 <5 <3 <3 <15 <827 KWO.800 CON Marcial Ranch 9/22/92 <3 <3 <7 <4 <T <4 <5 <3 <3 <16 <800 KWO.8t0 IND Clay Area Feed Lot 9/22/92 <3 <3 <7 <3 <7 <4 <6 <3 <3 <17 <816 R W2.1Mo IND Clay Area WeG tilppling's) 9/22/92 <3 <3 <7 <4 <7 <4 <7 <3 <3 <18 <835 .3 <3 <18 <812 KW3.7MO IND Silva Feed tot 9/22/92 <3 <3 <7 <3 <T <4 <T R WO.3E0 IND Site Welt 12/22/92 <4 <4 <8 <4 <8 <4 ' <8 <3 <4 <22 <836 RWO.8DO CON Marcial Ranch 12/22/92 <4 <4 <8 <4 <8 <4 <7 <3 <4 <19 <844 KWO.8to IND Clay Area Feed tot 12/22/92 <3 <3 <7 <3 <7 <4 <7 <3 <3 <18 <840 K W 2.1MO IND Clay Area Well (Tippling's) 12/22/92 <3 <3 <T <3 <6 <3 <6 <3 <3 <17 <831 RW3.7MO IND Silva Feed tot 12/22/92 <3 <3 <7 <3 <7 <4 <7 <3 <3 <18 <838 i Rancho Seco F-16 1992 AREOR - --~~v -n+ n a..----,---_..~.. -r, -v-v---.---w- - - - - - - ~ ~, .c

TA@LE F-9 Runoff Water, 1992 Biweekly (Pci/L) Sample collection H-3 Mn-54 Co-58 Fe-59 Co-60 Zn-65 Zr,ut>-95 I-131 Cs-134 Cs-137 sa,Le-140 ID Location Date .....w................................................................................................................................ RCWO.6MO site Boundary 1/06/92 <829 <6 <6 <12 <5 <13 <6 <6 <5 <6 <22 RCVO.6M00 Site Boundary;oA 1/06/92 <839 <7 <6 <13 <6 <14 <6 <7 <6 <T <26 i RRWD.6MO Site Boundary 1/20/92 <817 <6 <6 <12 <6 <12 <7 <5 <6 <22 RRWO.6M00 site Boundary;oA 1/20/92 <804 s4 <4 <9 <5 <10 <4 <6 <4 c5 <19 RRWO.6MO Site Boundary 2/03/92 < T72 <7 <7 <16 <7 <17 <8 <10 <7 <8 <33 RRWO.6M0Q Site Boundary;QA 2/03/92 <T84 <6 <6 <13 <6 <14 <6 <7 <5 <6 <25 RRWO.6MO Site Boundary 2/19/92 <783 <14 <13 <26 <14 <30 <14 <16 <11 <13 <56 GCVO.6M00 Site Boundary;oA 2/19/92 <789 <13 <14 <29 <14 <29 <13 <18 <13 <14 <59 RRWO.6MO site Boundary 3/02/92 <774 <6 <6 <12 <6 <12 <6 <7 <5 <6 <24 R;WO.6M00 Site Boundary;oA 3/02/92 <786 <6 <6 <11 <6 <13 <6 <T <6 <6 <23 RRWO.6MO Site Boundary 3/16/92 <850 <5 <5 <11 <6 <11 <6 <6 <5 <6 <22 GCVO.6M00 site Boundary;oA 3/16/92 <868 <6 <6 <13 <6 <15 <7 <8 <6 <7 <25 R;WO.6Mo site Boundary 3/30/92 <785 <5 <5 <9 <5 <11 <5 <5 <4 <5 <17 RRWO.6M00 Site Boundary;QA 3/30/92 <791 <4 <4 <8 <4 <9 <4 <5 <4 <4 <17 RRWO.6MO site Boundary 4/13/92 <T83 <6 <6 <12 <7 <13 <6 <7 <5 <6 <23 R0WO.6M00 site Boundary;oA 4/13/92 <T89 <3 <3 <6 <3 <7 <3 <4 <3 <3 <14 RRWO.6MO site Boundary 4/27/92 <790 <5 <5 <10 <5 <10 <5 <6 <4 <5 <20 RRWO.6M00 Site Boundary;QA 4/27/92 <757 <6 <6 <13 <6 <14 <7 <10 <6 <6 <30 QCWO.6MO Site Boundary 5/11/92 <816 <5 <5 <10 <5 <11 <5 <7 <5 <5 <20 QRWO.6M00 Site Boundary;QA 5/11/92 <832 <6 <6 <13 <6 <14 <6 <8 <6 <T <26 RRWO.6MO site somdary 5/21/92 <826 <3 <3 <7 <4 <7 <4 <6 <3 <3 <17 RRWO.6M00 Site Boundary;QA 5/21/92 <801 <8 <8 <17 <8 <18 <8 <13 <7 <8 <38 RRWO.6MO Site soundary 6/06/92 <821 <4 <4 <8 <4 <8 <4 <6 <3 <4 <18 RRWO.6M00 Site sourufery;oA 6/04/92 <809 <3 <3 <7 <3 <T <3 <5 <3 <3 <15 QDWO.6MO site Boundary 6/11/92 <796 <4 <4 <7 <4 <8 <4 <4 <3 <4 <14 RCVO.6M00 Site Boundary;oA 6/11/92 <793 <9 <9 <17 <10 <19 <10 <11 <9 <10 <35 QCWO.6MO site Boundary 6/22/92 <852 <3 <3 <6 <3 <6 <3 <4 <3 <3 <14 RGWO.6m00 Site Boundary;oA 6/22/92 <852 <3 <3 <6 <3 <6 <3 <4 <3 <3 <13 Rancho Seco F-17 1992 AREOR

L TABLE F-9 (Continued) Runoff Water, 1992 Biweekly (Pci/L) Sample collection N-3 ten-54 co-58 Fe-59 co-60 2n-65 2r,ub-95 I-131 Cs-134 cs-137 se,Le-140 ID Locotion Dete RRWO.6MO Site Boundary 7/06/92- <811 <4 <4 <9 <5 <9 <5 <6 <5 <19 RRWO.6M00 Site Boundary;0A 7/06/92 <811 <4 <4 <9 <5 <9 <4 <6 <4 <5 <19 RRWO.6MO Site soundary 7/21/92 <848 <6 <5 <12 <6 <13 <6 <7 <5 <6 <24 RIWO.6Moe Site Boundary:QA 7/21/92 <838 <4 <4 <9 <5 <10 <5 <6 <4 <5 <18 RIWO.6MO Site Boundary 8/06/92 <799 <3 <3 <7 <3 <7 <4 <5 <3 <3 <16 EWD.6 Moo site Boundary:oA 8/06/92 <814 <3 <3 <6 <3 <6 <3 <5 <3 <3 <13 liRWO.6MO Site Bourdery 8/18/92 <852 <3 <3 <7 <3 <7 <3 <5 <3 <3 <15 RRWo.6 Moo site soundary;oA 8/18/92 <862 <3 <3 <6 <3 <7 <3 <5 <3 <3 <15 RRWO.6MO Site Boundary 9/01/92 <868 <8 <9 <20 <8 <18 <10 <27 <8 <8 <60 RIWO.6M00 ' Site Boundary;oA 9/01/92 <845 <B <9 <19 <8 <19 <10 <26 <8 <8 <60 RRWO.6MO site Boundary 9/15/92 <840 <5 <5 <12 <6 <12 <6 <7 <5 <6 <24 RRWO.6MO Site soundary 9/29/92 <850 <4 <4 <9 <4 <? <4 <6 <4 <4 <17 RRWO.6 Moo site soundary;oA 9/29/92 <845 <4 <4 <8 <4 <9 <4 <6 <4 <4 <18 RIWO.6Mo site Boundary 10/13/92 < T58 <3 <3 <6 <3 <6 <3 <4 <3 <3 <12 RIWO.6Mo Site soundary 10/27/92 <818 <3 <3 <7 <3 <7 <4 <8 <3 <3 <20 RRWO.6M00 Site Boundary:QA 10/27/92 <815 <3 <3 <7 <3 <7 <4 <9 <3 <3 <21 RRWO.6MO Site Boundary 11/09/92 <358 <3 <3 <7 <3 <7 <3 <6 <3 <3 <16 RIWO.6Mo site Boundary 11/23/92 ' <829 <T <8 <19 <8 <18 <10 <27 <7 <8 <57 RRWO.6M0Q Site Boundary;oA 11/23/92 <839 <T <T <16 <6 <15 <8 <17 <6 <T <43 RT.WO.6Mo site Boundary 12/07/92 <837 <4 <4 <8 <4 <8 <4 <5 <4 <4 <17 RIWO.6MO site Boundary 12/22/92 <838 <3 <3 <7 <3 <6 <4 <8 <3 <3 <20 RRWo.seco site soundary;oA 12/22/92 <853 <3 <3 <7 <3 <7 <4 <9 <3 <3 <22 l-l 1 Rancho Seco F-18 1992 AREOR

TABLE F-10 SURFACE WATER, 1992 Monthly Grab, Monthly Composite (PCi/L) Sample Collection H-3 Mn-54 Co-58 Fe-59 Cc 60 Zn-65 Zr,mb-95 1-131 Cs-134 Cs-137 Ra,La-140 ID Class Location Type Date RSWO.7No IND Water Step Monthly grab 1/22/92 <773 <5 <5 <10 <6 <12 <6 <T <5 <6 <22 RSW9.3F0 CON Rancho Seco Reservoir Monthly grab 1/22/92 <817 <7 <6 <13 <7 <13 <6 <9 <6 <7 <26 R$W1.8NO IND Madselville/ Clay Creeks Monthly grab 1/22/92 <784 <5 <6 <12 <6 <12 <6 <7 <5 <6 <23 RSW1.8N00 IND Hadselville/ Clay Creeks Monthly grab;QA 1/22/92 <810 <6 <5 <12 <6 <13 <6 <7 <6 <6 <23 RSWO.3MO IND Effluent Discharge Conposite, Monthly 1/29/92 <778 <7 <8 <17 <7 <15 <9 <30 <6 <7 <60 RSM3.TNO CON Folsom South Canal Conposite, Monthly 1/29/92 <T72 <7 <8 <18 <7 <16 <10 <27 <6 <7 <60 QSWO.7No IND Water Supp Monthly grab 2/20/92 <845 <13 <12 <30 <13 <28 <15 <20 <11 <13 <52 RSW1.3F0 CON Rancho Seco Reservoir Monthly grab 2/20/92 <839 <12 <12 <26 <13 <26 <12 <19 <11 <14 <60 RSW1.ENO IND Hadselville/ Clay Creeks Monthly grab 2/20/92 <820 <13 <13 <26 <15 <27 <13 <19 <13 <12 <57 RSW1.8N00 IND Hadselville/ Clay Creeks Monthly grab;QA 2/20/92 <832 <13 <13 <29 <11 <26 <15 <20 <13 <14 <59 RSWO.3MO IND Effluent Discharge Conposite, Monthly 2/26/92 <805 <12 <13 <27 <14 <30 <11 <14 <13 <14 <45 RSW3.7NO CON Folsom South Canal Copposite, Monthly 2/26/92 <807 <12 <11 <22 <12 <26 <12 <12 <11 <12 <42 RSWO 7NO IND Water Step Monthly grab 3/26/92 <824 <2 <2 <4 <2 <4 <2 <7 <2 <2 <13 RSW1.3F0 CON Rancho Seco Reservoir Monthly grab 3/26/92 <818 <4 <4 <8 <4 <9 <4 <7 <4 <4 <20 RSW1.BNO IND Hadselville/ Clay Creeks Monthly grab 3/26/92 <872 <5 <5 <11 <5 <11 <6 <8 <4 <5 <24 RSW1.8N0Q IND Madselville/ Clay Creeks Monthly grab;QA 3/26/92 <812 <10 <10 <23 <11 <24 <12 <17 <10 <11 <50 RSWO.3MO IND Effluent Discharge Conposite, Monthly 3/26/92 <B% <3 <5 <12 <3 <7 <7 <150 <3 <3 <125 RSW3.7NO CON Folsom South Canal Conposite, Monthly 3/26/92 <842 <5 <5 <11 <5 <10 <5 <8 <4 <5 <22 RSWO.7NO IND Water Supp Monthly grab 4/22/92 <939 <3 <4 <7 <4 <8 <4 <1.5 <3 <4 <17 RSW1.3F0 CON Rancho Seco Reservoir Monthly grab 4/22/92 <963 <3 <3 <6 <3 <7 <3 <1.6 <3 <3 <14 RSW1.8NO IND Hadselville/ Clay Creeks Monthly grab 4/22/92 <961 <3 <3 <7 <3 <6 <3 <1.5 <3 <3 <14 RSW1.BN00 IND Hadselville/ Clay Creeks Monthly grab;QA 4/22/92 <953 <5 <5 <10 <5 <11 <5 <1.3 <4 <5 <72 QCWO.3MO IND Effluent Discharge Conposite, Monthly 4/27/92 <785 <6 s6 <14 <6 <15 <7 <10 <6 <7 <32 QSW3.7NO CON Folsom South Canal Conposite, Monthly 4/27/92 <780 <3 <3 <7 <3 <7 <4 <6 <3 <3 <17 RSWO.7No IND Water Strp Monthly grab 5/27/92 <820 <4 <4 <9 <4 <9 <4 <7 <4 <4 <20 RSW1.3F0 CON Rancho Seco Reservoir Monthly grab 5/27/92 <823 <3 <3 <7 <3 <6 <4 <8 <3 <3 <19 CtW1.8NO IND Hadselville/ Clay Creek Monthly grab 5/27/92 <808 <4 <4 <8 <4 <8 <4 <7 <3 <4 <18 QSW1.8N00 IND Hadselville/ Clay Creek Monthly grab;QA 5/27/92 <812 <3 <3 <7 <3 <7 <3 <8 <3 <3 <20 QSWO.3MO IND Effluent Discharge Composite, Monthly 5/27/92 <873 <6 <6 <14 <7 <13 <7 <12 <6 <7 <31 RSW3.7NO CON Folsom South Canal Conposite, Monthly 5/27/92 <863 <3 <3 <8 <3 <7 <4 <9 <3 <3 <22 RSWO.7NO IND Water Sunp Monthly grab 6/29/92 <817 <4 <4 <8 <4 <8 <4 <5 <3 <4 <16 RSW1.380 CON Rancho Seco Reservoir Monthly grab 6/29/92 <808 <3 <3 <7 <3 <6 <4 <9 <3 <3 <22 QSW1.BNO IND Madselville/ Clay Creek Monthly grab 6/29/92 <820 <3 <3 <7 <4 <7 <3 <5 <3 <4 <14 RSW1.8N00 IND Madselville/Cisy Creek Monthly grab;QA 6/29/92 <819 <4 <4 <8 <4 <8 <4 <5 <3 <4 <16 RSWO.3MO IND Effluent Discharge Conposite, Monthly 6/29/92 <T94 <6 <6 <15 <5 <12 <8 <32 <5 <6 <60 QSW3.7No CON Folsom South Canal conposite, Monthly 6/29/92 <815 <3 <4 <9 <3 <7 <5 <37 <3 <3 <52 Rancho Seco F-19 1992 AREOR

TABLE F-10 (Continued) SURFACE WATER, 1992 Monthly Grab, Monthly Composite (PCi/L) Sample Collection M-3 Mn-54 Co-58 Fe-59 Co-60 2n-65 Zr,ub-95 I-131 Cs-134 Cs-137 ma,La-140 10 Class Location Type Date RSWO.7NO IND Water Sw p Monthly grab 7/29/92 <792 <8 <8 <18 <8 <18 <10 <22 <7 <8 <53 RSW1.3F0 CON Rancho Seco Reservoir Monthly grab 7/29/92 <786 <6 <6 <14 <6 <12 <7 <13 <5 <6 <33 RSW1.BNO IND Hadselville/ Clay Creeks Monthly grab 7/29/92 <792 <6 <6 <14 <6 <13 <7 <16 <5 <6 <37 RSW1.8400 IND Hadselville/ Clay Creeks Monthly grab;QA 7/29/92 <786 <7 <7 <15 <6 <15 <8 <16 <6 <7 <44 RSWO.3MO IND Effluent Discharge Composite, Monthly 8/03/92 <794 <8 <8 <17 <8 <18 <9 <14 <7 <8 <38 i RSW3.7NO CON Folsom South Canal Composite, Monthly 8/03/92 <T91 <3 <3 <T <3 <7 <3 <6 <3 <3 <16 RSWO.7NO IND Water Swp Monthly grab 8/25/92 <959 <3 <3 <6 <3 <6 <3 <4 <3 3+-2 <12 RSW1.3F0 CON Rancho Seco Reservoir Monthly grab 8/25/92 <943 <3 <3 <6 <3 <6 <3 <4 <3 <3 <13 RSW1.8NO IND Hadselville/ Clay Creeks Monthly grab 8/25/92 <921 <3 <4 <T <4 <8 <4 <5 <3 <4 <16 RSW1.8400 IND Hadselville/ Clay Creeks Monthly grab;QA 8/25/92 <936 <3 <3 <7 <4 <8 <4 <5 <3 <4 <16 R!WO.3MO IND Effluent Discharge Conposite, Monthly 9/01/92 <838 <3 <3 <7 <3 <7 <4 <7 <3 <3 <20 ESW3.7No CON Folsom South Canal Composite, Monthly 9/01/92 <830 <3 <3 <6 <3 <6 <3 <7 <3 <3 <18 RSWO.7NO IND Water Sw p Monthly Grab 9/22/92 <896 <3 <3 <7 <4 <7 <4 <8 <3 <3 <20 RSW1.3F0 CON Rancho Seco Reservoir Monthly Grab 9/22/92 <905 <3 <3 <7 <3 <T <4 <7 <3 <3 <19 RSW1.8NO IND Hadselville/ Clay Creeks Monthly Grab 9/22/92 <907 <3 <3 <6 <3 <6 <3 <7 <3 <3 <18 RSWO.3MO IND Effluent Discharge Conposite, Monthly 9/29/92 <839 <3 <3 <7 <3 <7 <4 <8 <3 <3 <20 RSV3.7NO CON Folsom South Canal (greb) Composite, Monthly 9/29/92 <821 <3 <3 <7 <7 <3 <3 <6 <3 <3 <16 RSWO.7NO IND Water Sw p Monthly Grab 10/21/92 <871 <3 <3 <7 <3 <7 <4 <5 <3 <3 <15 RSW1.3F0 CON Rancho Seco Reservoir Monthly Grab 10/21/92 <851 <3 <3 <6 <3 <6 <3 <S <3 <3 <13 RSW1.8MO IND Hadselville/ Clay Creeks Monthly Grab 10/21/92 <850 <4 <4 <8 <4 <9 <4 <5 <4 <4 <17 RSW1.8N00 IND. Hadselville/ Clay Creeks Monthly Grab:QA 10/21/92 <871 <3 <3 <7 <3 <7 <3 <5 <3 <3 <14 RSWO.3MO IND Effluent Discharge Conposite, Monthly 10/27/92 <815 <3 <3 '<7 <3 <7 <4 <8 <3 <3 <20 RSW3.7No CON Folsom South Canet Composite, MontMy 10/27/92 <809 <3 <3 <7 <3 <T <4 <8 <3 <3 <19 RSWO.7No IND Water Swp Monthly Grab 11/23/92 <853 <8 <9 <19 <9 <18 <10 <30 <8 <9 <57 RSW1.3F0 CON Rancho Seco Reservoir Monthly Grab 11/23/92 <840 <3 <3 <7 <3 <T <4 <9 <3 <3 <20 RSW1.8NO IND Hadselville/ Clay Creeks Monthly Grab 11/23/92 <B48 <3 <3 <7 <3 <7 <4 <10 <3 <3 <22 RSWO.3MO IND Effluent Discharge Conposite, Monthly 12/01/92 <B40 <3 <4 <10 <3 <7 <6 <67 <3 <3 <T6 R$W3.7No CON Folsom South Canal Conposite, Monthly 12/01/92 <821 <3 <4 <11 <3 <T <6 <T3 <3 <3 <TT RSWO.7NO IND Water Sump Monthly Grab 12/22/92 7328/585 <3 <4 <8 <3 <7 <4 <12 <3 <4 <26 RSW1.3F0 CON. Rancho Seco Reservoir Monthly Grab 12/22/92 <807 <8 <8 <20 <8 <18 <9 <26 <7 <S <56 RSW1.8NO IND Hadselville/ Clay Creeks Monthly Grab 12/22/92 <802 <4 <4 <8 <4 <8 <4 <9 <3 <4 <22 RSW1.8NOQ IND Hadselville/ Clay creeks Monthly Grab;0A 12/22/92 <813 <3 <3 <7 <3 <7 <4 <8 <3 <3 <19 RSWO.3M0 IND Effluent Discharge Composite, Monthly 12/29/92 6078/565 <3 <3 <7 <3 <7 <3 <6 <3 <3 <18 RSW3.7NO CON Folsom South Canal Composite, Monthly 12/29/92 <799 <3 <3 <T <3 <7 <4 <8 <3 <3 <20 Rancho Seco F-20 1992 AREOR

e TABLE F-11 DRINKING WATER, 1992 Monthly (PC1/L) Sample Collection M-3 un-54 00-58 Fe-59 Co-60 Zn-65 Zr/uts-95 I-131 Cs-134 cm-137 se/La-140 0 Ctess Description of Lacetion Dete RDWO.1GO IND Rancho Seco Site Drinking Water 1/20/92 <804 <6 <6 <12 <T <13 <6 <2 <6 <6 <25 KDWO.1GO IND Rancho Seco Site Drinking Water-2/20/92 <807 <3 <3 <6 <3 <6 <3 <1 <3 <3 <14 RDWO.1GO IND Rancho Seco Site Drinking Water 3/26/92 <818 <6 <6 <13 <6 <14 <7 <0.9 <5 <6 <29 KDWO.1GO IND Rancho Seco Site Drinking Water 4/22/92 <953 <5 <5 <10 <5 <11 <5 <1.2 <4 <5 <22 RDWO.1GO IND Rancho Seco Site Drinking Water 5/27/92 <824 <4 <4 <8 <4 <8 <4 <5 <3 <4 <16 RDWO.1GO IND Rancho Seco Site Drinking Water 6/29/92 <823 <3 <3 <7 <3 <T <4 <10 <3 <3 <23 RDWO.1GO IND Rancho Seco Site Drinking Water 7/29/92 <T86 <9 <9 <19 <9 <17 <11 <29 <8 <9 <60 KDWO.1GO IND Rancho Seco Site Drinking Water 8/25/92 <T88 <3 <3 <7 <3 <7 <4 <6 <3 <3 <17 RDWO.1GO IND Rancho Seco Site Drinking Water 9/22/92 <837 <3 <3 <T <3 <6 <3 <9 <3 <3 <20 RDWO.1GO INO Rancho Seco Site Drinking Water 10/21/92 <790 <3 <3 <T <3 <T <3 <6 <3 <3 <17 KDWO.1GO IND Rancho Seco Site Drinking Water 11/23/92 <840 <6 <7 <15 <6 <14 <8 <30 <6 <7 <57 RDWO.1GO IND Rancho Seco Site Drinking Water 12/22/92 <826 <3 <3 <7 <3 <6 <4 <10 <3 <3 <23 i i Rancho Seco F-21 1992 AREOR --,,,.-m-..-_..--,.m..._...,..--.....--,-....-.---.e, .-...rrw., ,,,-,,..w..... a. r +.,. - - .--,e-mm ..w .--..~..,.,,-o.- m

? APPENDIX G MISSED SAMPLES In accordance with the REMP manual section 3.1, the following are samples that were not collected during 1992. ( TLD Location # 7, RTLO.5CO, Rancho Seco Entrance (Indicator) - This TLD was fcund missing during the 3rd quarter 1992 change-out. The TLD was replaced during the change-out. Location # 35, RTLI.9NO, Hadselville / Plant Effluent (Clay) Creeks (Indicator) - This TLD was missing during the 3rd quarter 1992 change-out. The TLD was replaced during the change-out. FISH Failure to collect required samples - The 1st quarter of 1992, fish were not available at the sampling locations listed in the REMP manual. This was due to seasonal unavailability. (PDQ 92-0023, CTS 50899) Failure to collect required samples - The 2nd quarter of 1992, fish j were not available at the sampling locations listed in the REMP i manual. This was due to seasonal unavailability. (PDQ 92-0041, CTS 50954) CRAWFISH Failure to collect required samples - The 1st quarter of 1992, crawfish were not available at the sampling locations listed in the REMP manual. This was due to seasonal unavailability. (PDQ 92-0023, CTS 50899) I AIR l RASO.7EO, Meteorological Tower (control), failed to operate continuously during the week of 11/16/92 - This occurred due to the air sampler not being turned on when the air sample was changed out on 11/16/92. The air sampler filter was changed-out and the air sampler was restarted. No air sample data was available for this i week. (PDQ 92-0074, CTS 51087) l Rancho Seco G-1 1992 AREOR i

MISSED SAMPLES (continued) Surface Water f i RSW3.7NO, Folsom South Canal, monthly composite (control) - Monthly j composite sample for the month of September 1992. There was insufficient sample volume to meet the required one gallon { collection volume due to composite sampler malfunction. j i RSW3.7NO, Folsom South Canal, monthly composite (control) - Monthly l composite sample for the month of October 1992. There was l insufficient sample volume to meet the required one gallon collection volume due to composite sampler malfunction. I I I l .I l ) 1 l l l I Rancho Seco G-2 1992 AREOR _ _ _,}}

ML20044E248

Contents

Text

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

Navigation menu

ML20044E248

Text

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

SUMMARY

Navigation menu

Search