LIC-02-0045, 2001 Radiological Environmental Operating Report

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2001 Radiological Environmental Operating Report
ML021070810
Person / Time
Site: Fort Calhoun Omaha Public Power District icon.png
Issue date: 04/12/2002
From: Ridenoure R
Omaha Public Power District
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
LIC-02-0045
Download: ML021070810 (41)
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Text

Omaha Public Power District 444 South 16th Street Mall Omaha NE 68102-2247 April 12, 2002 LIC-02-0045 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555

Reference:

Docket No. 50-285

SUBJECT:

2001 Fort Calhoun Station (FCS) Radiological Effluent Release Report and Radiological Environmental Operating Report Pursuant to FCS Unit No. 1 Technical Specifications (TS) 5.9.4.a and 5.9.4.b, the Omaha Public Power District (OPPD) provides the enclosed two reports. The first report is the Annual Radiological Effluent Release Report for January 1, 2001, through December 31, 2001. This report is submitted in accordance with TS Section 5.9.4.a and is presented in the format outlined in Regulatory Guide 1.21, Revision 1. The report provides the results of quarterly dose calculations performed in accordance with the Offsite Dose Calculation Manual (ODCM).

The second report is the Annual Radiological Environmental Operating Report for January 1, 2001, through December 31, 2001. This report is submitted in accordance with TS Section 5.9.4.b and is consistent with the objectives specified in Section 5 of the ODCM.

Please contact R. G. Haug at 402-533-7156 if you have any questions.

c: E. W. Merschoff, NRC Regional Administrator, Region IV A. B. Wang, NRC Project Manager (w/o Enclosures)

W. C. Walker, NRC Senior Resident Inspector T. J. Wolff, American Nuclear Insurers Winston & Strawn (w/o Enclosures)

(4-o Employment with Equal Opportunity 4171

Omaha Public Power District Fort Calhoun Radiological Environmental Report 2001 4 ,"

OMAHA PUBLIC POWER DISTRICT FORT CALHOUN STATION RADIOLOGICAL ENVIRONMENTAL OPERATING REPORT TECHNICAL SPECIFICATION 5.9.4b January 01, 2001 - December 31, 2001

Annual Radiological Environmental Operating Report This report is submitted in accordance with Section 5.9.4b of the Technical Specifications of Fort Calhoun Station Unit No. 1, Facility Operating License DPR-40 for the period January 01, 2001 through December 31, 2001.

In addition, this report provides any observations and anomalies that occurred during the monitoring period.

Reviewed by: Approved by:

Supervisor-System Chemistry Manager-Clemistry

Annual Radiological Environmental Operating Report In accordance with Technical Specification 5.9.4b, herein is the Fort Calhoun Station (FCS) Annual Radiological Environmental Operating Report for year 2001. The data provided is consistent with the objectives as specified in Section 5.2.2 of the Offsite Dose Calculation Manual (ODCM), "Annual Radiological Environmental Operating Report". The report is presented as follows:

1) An introductory discussion of the implementation of the Radiological Environmental Monitoring Program (REMP), including program observations and environmental impact relevant to the operation of FCS.
2) The sample class, sample collection frequency, number of sample locations, and the number of samples collected this reporting period for each parameter is delineated in Table 1.0.
3) A statistical evaluation of REMP data is summarized in Table 2.0, in accordance with Regulatory Guide 4.8, Table 1. For each type of sample media and analysis, Table 2.0 presents data separately for all indicator locations, all control (background) locations, and the location having the highest annual mean result. For each of these classes, Table 2.0 specifies the following:
a. The total number of analyses.
b. The fraction of analyses yielding detectable results (i.e., results above the highest Lower Limit of Detection (LLD) for this period.
c. The maximum, minimum, and average results.
d. Locations with the highest mean are specified along with their distance and direction from the center of plant containment.
4) Table 3.0 is a listing of missed samples and explanations.
5) Review of Environmental Inc. Quality Assurance Program
6) Appendix A describes the Interlaboratory Comparison Program
7) Appendix B describes the vendor Data Reporting Conventions utilized.
8) Appendix C reports the information required when primary coolant specific activity has exceeded the limits of Technical Specification 2.1.3.

Page 1 of 11

INTRODUCTION Radiological Environmental Monitoring Progqram (REMP) - 2001 The Fort Calhoun Station (FCS), owned and operated by Omaha Public Power District, conducts a stringent environmental radiological monitoring program.

This program was initiated prior to plant operation in 1973 and continues to be performed as a requirement of the facility-operating license. Pre-operational and operational environmental monitoring data generated have been recorded and will be archived for the duration of the plant's existence. This submittal contains the results of the Radiological Environmental Monitoring Program (REMP) and the operatives required for the FCS Annual Radiological Environmental Operating Report for year 2001.

The primary function of the REMP is to ensure the overall safety of the general public by monitoring plant liquid and gaseous discharges to the environment. The data accumulated is utilized to assess the overall impact of plant operation on the environment and to determine whether adjustments to plant operations or the REMP are needed.

Program objectives are accomplished by monitoring the potential radiation exposure pathways to the public including adsorption, inhalation, ingestion, and direct exposure. Both grab samples and composite samples are collected and analyzed to represent these exposure pathways including air, water, milk, vegetation, fish, sediment, and food crops. Direct exposure is monitored by utilizing thermoluminescent dosimeters (TLDs) that are installed in the field at several locations, including air monitoring stations. Samples are collected at both control (background) and indicator locations, which are selected based on radiological, meteorological, and geographical factors that are obtained from the Annual Effluent Release Report and the Environmental Land Use Survey.

Most monitoring is conducted within a five-mile radius circle centered on plant containment. However, some samples, typically control samples, are collected outside of five miles. This circle is divided into sixteen equal sectors of 22.5 degrees each. Each sector is assigned an identification letter "A" through "R" (note: letters "I"and "0"are not used as they may be mistaken for the numbers one and zero). Sector "A" is centered on North or zero degrees. Sectors are also given directional labels such as west-southwest ("WSW"). Sample locations are assigned a station number and their distance and direction from plant containment are listed in the Offsite Dose Calculation Manual (ODCM). Sample locations are also marked on sector maps maintained by the Environmental Group.

In interpreting the data, results due to plant operation are distinguished from those due to other sources by comparing control sample results (upwind, upstream, or distant) to indicator sample results (downstream, downwind, or nearby) for each type of sample collected. The program uses analysis Page 2 of 11

techniques that are sufficiently sensitive to detect radiation levels far below those that are considered hazardous to humans. A station attributable effect could be indicated if the sample results at an indicator location are significantly larger than those at the control location. The difference would have to be greater than that which could be accounted for by typical fluctuations in radiation from other sources. In year 2001, the activity present in some of the routinely sampled media was determined to be from plant sources, although any plant affects on the environment were considered negligible.

Results of completed analyses, as required by the FCS Offsite Dose Calculation Manual (ODCM), are presented in the attached statistical tables in accordance with Table 1 of Regulatory Guide 4.8, "Environmental Technical Specifications for Nuclear Power Plants." The plant chemistry and environmental staff conducted the environmental sampling required by the REMP. A contract vendor (Environmental Inc., Northbrook, Illinois) performed sample analyses, preparation of monthly progress reports, and the statistical evaluation of sample analyses.

Results for this reporting period were generally within expected ranges and compared favorably to historical trends. The following observations were documented during the monitoring period:

1) AMBIENT GAMMA RADIATION-TLD All environmental dosimeters were recovered and analyzed. A data comparison for years 2000 and 2001 indicated no overall increase in gamma radiation to the unrestricted area. The mean dose (mr/week) for all indicator locations for year 2001 was actually slightly lower than that for year 2000. Data was well within the expected range and no negative trend was identified. As a result, no observable environmental impact is indicated that would require changes or modifications to plant systems or operation.
2) MILK I VEGETATION Milk samples were available within the five-mile monitoring area for most of the grazing season (May to October). However, during the first part of the grazing season milk was not available at the indicator location.

Therefore, vegetation (pasture grass) was collected in lieu of milk at both the indicator and the control locations until milk was available. Results for 1-131 and other gamma emitting isotopes were all <LLD for both milk and vegetation. No adverse environmental effects were observed. One duplicate pasture grass sample (May 17, 2001) was inadvertently combined with the original sample from the same location by the vendor and analyzed as a composite sample, however, the results were <LLD. A reanalysis could not be performed because the vendor had disposed of the sample. A condition report was initiated to acknowledge the occurrence. It was determined that because the results of the sample Page 3 of 11

analysis were <LLD, there was no adverse environmental affect observed.

No plant systems or operational modifications are required as a result of these findings.

3) FISH Comparison of 2000 and 2001 analyses indicate no adverse trend. All indicator and control fish sample analyses were <LLD as expected.

During shipping to the vendor for analysis, one ice chest containing fish samples appeared to have been vandalized while enroute. However, the fish samples were ultimately recovered by the courier and delivered to the vendor intact for analysis. A condition report was initiated to acknowledge this occurrence. No plant systems or operational modifications are required as a result of these findings.

4) FOOD CROPS Garden vegetable samples were collected at the offsite indicator location (resident receptor) determined to have the highest potential for exposure as a result of plant operation. Vegetables were also collected at a control location outside of the five-mile monitoring area. Analyses were all <LLD.

Year 2001 data compared favorably with year 2000 data, as expected. No negative trend was identified. Therefore, no plant system or operational modifications will be implemented as a result of these findings.

5) SEDIMENT Bottom sediment sample analyses were all <LLD for both indicator and control locations for 2001. This compared favorably with results from 2000. No plant systems or operational modifications will be required.
6) AIR MONITORING Comparison of 2000 and 2001 air monitoring data indicates that results are consistent with data from previous years. There were no incidents of downtime or missed samples during 2001. One monitor experienced a brief timer malfunction when the timer was found to be intermittently running slow. Actual time elapsed was used to calculate results for that sample. A condition report was initiated to document this occurrence. No modifications are required as a result of this occurrence.
7) WATER Fourth quarter water results (tritium composite) were greater than analytical lower limit of detection (300 pCi/L). A condition report was initiated to acknowledge these results, which required plant staff to conduct a chemistry evaluation of effluent release data for the period in Page 4 of 11

which the activity was found. The following evaluation will look at plant effluents as a possible source and doses attributed to those positive samples versus theoretical dose calculated from chemistry software.

Downstream location OSW-B-I tritium was determined by the vendor (Environmental Inc.) to be 487 pCi/L for the fourth quarter. The vendor reanalyzed the sample, which confirmed original results. Additionally, each monthly composite sample for the fourth quarter was analyzed separately with the following results: October - 557 pCi/L, November 583 pCi/L, and December - 60 pCi/L. During the December sampling period (December 5-26, 2001) no monitor tanks were released.

Environmental samples were performed during monitor tank releases during October and November. A calculation of tritium concentration at site discharge during these monitor tank releases was performed. Using the low mixing value listed in the ODCM, the Missouri River was extremely low during the sampling period. The concentration at site discharge for Monitor Tank (MT) Release 2001156 was 1336 pCi/L and for MT 2001165 was 1127 pCi/L. Creating a composite for October and November using these calculated values and the sample volumes obtained from the environmental samples during periods of no release would result in composite values consistent with the Environmental Inc. findings. The average monitor tank tritium concentration for the quarter was 0.0969 ýtCi/ml. A dose calculation was performed using the quarterly discharged volume and this average tritium concentration using Genie software. The result was 4.9E-03 mrem. A dose estimate was also performed using the equations listed in the ODCM and the positive sample result. For the determination, an adult was assumed to drink water at 487 pCi/L for one quarter at the rate listed in Table 6. The dose from that calculation was 5.3E-03 mrem (487pCi/L

  • 730L/yr * .25yr
  • 5.99E-08 mrem/pCi).

In summation, no changes are required to the FCS effluent processes due to this positive environmental result. The dose attributed to the positive result is consistent with that estimated by LADTAP software. The level of this positive sample is well below the reporting level of 20,000 pCi/L. The dose estimated represents 0.16% of the annual limit of 3 mrem. A condition report was written. No plant system or operational modifications are required as a result of these findings.

Page 5 of 11

Table 1.0 Sample collection program Number of Number of Samples Collection Sample Collected Sample Class Frequency Locations This Period Background Radiation (TLD's) Quarterly 12 48 Air Particulates Weekly 5 260 Airborne Iodine Weekly 5 260 Milk Semimonthly 2 14 Pasture Grass (milk substitute) 2 10 Water Monthly 3 36 Fish Annually 2 5 Sediment Semiannually 2 4 Food Crops Annually 2 8 TOTAL 645 Page 6 of 11

Table 2.0 Radiological Environmental Monitoring Program Summary Name of Facility Fort Calhoun Nuclear Power Station - Unit I Docket No. 50-285 Location of Facility Washington, Nebraska Reporting Period January-December, 2001

( County, State)

Background Gamma 48 0.5 1.4 (40/40) OTD-J-(I), Onsite Stn. 1.6 (4/4) 1.4 (8/8) 0 Radiation (TLD) (1.2-1.7) 0.7 mi @ 250°/WSW (1.5-1.7) (1.1-1.6)

(mR/week)

Airborne GB 260 0.005 0.028 (208/208) OAP-B-(l) 0.029 (52/52) 0.028 (52/52) 0 Particulates (0.011-0.058) Old Plant Access Rd. (0.013-0.047) (0.011-0.046)

(pCi/m3) 0.6 mi @ 208°/SSW GS 20 Cs-134 0.001 < LLD - < LLD 0 Cs-137 0.001 < LLD - - < LLD 0 Other Gammas 0.001 < LLD - - < LLD 0 Airborne 1-131 260 0.07 < LLD - - < LLD 0 Iodine (pCi/m3)

Milk 1-131 14 0.5 < LLD - - < LLD 0 (pCi/L)

GS 14 K-40 150 1940 (7/7) OFM-F-(I), Bansen, 1940 (7/7) 1299 (7/7) 0 (1824-2049) 0.7 mi. @ 207°/SSW (1824-2049) (1147-1408)

Cs-134 15 < LLD - - < LLD 0 Cs-137 15 < LLD - - < LLD 0 Other Gammas 15 < LLD - - < LLD 0 Pasture Grass GS 10 (milk substitute) Mn-54 0.022 < LLD - - < LLD 0 pCi/g wet Co-58 0.026 < LLD - - < LLD 0 Co-60 0.024 < LLD - - < LLD 0 Fe-59 0.047 < LLD - - < LLD 0 Zn-65 0.066 < LLD - - < LLD 0 Zr-Nb-95 0.022 < LLD - - < LLD 0 1-131 0.052 < LLD - - < LLD 0 Cs-134 0.030 < LLD - - < LLD 0 Cs-1 37 0.029 < LLD - - < LLD 0 Ba-La-140 0.021 < LLD - - < LLD 0 Water GS 36 (pCi/L) Cs-134 15 < LLD - - < LLD 0 Cs-137 18 < LLD - - < LLD 0 Other Gammas 15 < LLD - < LLD 0 H3 12 300 487 (1/8) OSW-B-I, Downstream 487 (1/4) < LLD 0 0.5 mi. @ 106' /ESE Page 7 of 11

Table 2.0 Radiological Environmental Monitoring Program Summary Name of Facility Fort Calhoun Nuclear Power Station - Unit 1 Docket No. 50-285 Location of Facility Washinaton. Nebraska Reporting Period January-December, 2001

( County, State )

Fish GS 5 (pCi/g wet) Mn-54 0.012 < LLD - < LLD 0 Co-58 0.019 < LLD - < LLD 0 Co-60 0.015 < LLD - - < LLD 0 Zn-65 0.025 < LLD - - < LLD 0 Ru-103 0.022 < LLD - - < LLD 0 Cs-134 0.018 < LLD - - < LLD 0 Cs-137 0.015 < LLD - - < LLD 0 Sediment GS 4 pCi/g dry Mn-54 0.020 < LLD - - < LLD 0 Co-58 0.025 < LLD - - < LLD 0 Co-60 0.013 < LLD - - < LLD 0 Zn-65 0.077 < LLD - - < LLD 0 Cs-134 0.032 < LLD - - < LLD 0 Cs-137 0.025 < LLD - - < LLD 0 Food Crops GS 8 (pCi/g wet) Mn-54 0.009 < LLD - - < LLD 0 Co-58 0.011 < LLD - - < LLD 0 Co-60 0.012 < LLD - - < LLD 0 Fe-59 0.027 < LLD - - < LLD 0 Zn-65 0.020 < LLD - - < LLD 0 Zr-Nb-95 0.014 < LLD - - < LLD 0 Cs-134 0.011 < LLD - - < LLD 0 Cs-137 0.010 < LLD - - < LLD 0 Ba-La-140 0.026 < LLD - - < LLD 0

'GB = gross beta, GS = gamma scan.

bLLD = nominal lower limit of detection based on a 95% confidence level.

c Mean and range are based on detectable measurements only (i.e., >LLD) Fraction of detectable measurements at specified locations is indicated in parentheses (F).

dLocations are specified: (1) by code, (2) by name, and (3) by distance and direction relative to the Reactor Containment Building.

e Non-routine results are those which exceed ten times the control station value. If no control station value is available, the result is Considered non-routine ifit exceeds the typical pre-operational value for the medium or locationn.

Page 8 of 11

Table 3.0 Listing of missed samples (samples scheduled but not collected)

Sample Type Date Location Reason All required samples for the REMP were collected as scheduled for 2000.

Page 9 of 11

Review of Environmental Inc., Quality Assurance Program Fort Calhoun Station contracts with Environmental Inc., Midwest Laboratory (vendor) to perform radioanalysis of environmental samples. Environmental Inc. participates in interlaboratory comparison (crosscheck) programs, as part of its quality control program.

These programs are operated by agencies such as the Department of Energy which supply blind-spike environmental type samples such as milk or water containing concentrations of radionuclides unknown to the testing laboratory. This type of program provides an independent check of the testing laboratory's procedures and processes, and provides indication of possible weaknesses. In addition, Environmental Inc. has its own in-house QA program of blind-spike and duplicate analyses.

The plant staff reviewed the vendor's Interlaboratory Comparison Program for 2001 and noted that a total of seven standards analyzed did not meet the required acceptance criteria specifications. As a result, a chemistry evaluation was conducted to determine if these inconsistencies affected REMP sample analyses. The findings of the evaluation indicated that the vendor's explanations and corrective actions were appropriate and that the standards not meeting acceptance criteria did not affect REMP sample analyses.

During the year 2001, Environmental Inc. reported the following discrepancies:

Samole Code/Tvre Date Comments STW-921/Water July, 2001 Lab results for Sr-89 were 19.8 +/- 1.5 pCi/L; Control limits: 22.5 - 39.9. Delay in processing may have contributed to deviation. Reanalysis results were within limits, 35.3 +/- 4.4 pCi/L.

Results for OPPD water samples for gamma isotopes <LLD for the year.

SPW-483/Water Jan. 2001 Lab results for Ra-228 were 10.55 +/- 2.02 pCi/L; Control limits: 13.6 - 25.26. Insufficient sample available to perform reanalysis.

SPMI-1270/Milk Mar. 2001 Lab results for Cs-137 were 46.61 +/- 8.81 pCi/L; Control limits: 25.90 - 45.90. A new Cs-137 spike was prepared. Reference sample SPMI-3232, which was within limits. No OPPD milk samples were collected or analyzed during March.

SPMI-3233/Milk Apr. 2001 Lab results for Sr-90 were 1.18 +/- 0.35 pCi/L; Control limits: <1.0. Low levels of Sr-90 are detected in the environment. These results are not unusual for milk. No OPPD milk samples were collected or analyzed during April.

Page 10 of 11

Samole Code/Tvne SamleCod/TneDate Comments SPMI-6146/Milk July, 2001 Lab results for Sr-90 were 1.09 +/- 0.36 pCi/L; Control limits: <1.0. Low levels of Sr-90 are detected in the environment. These results are not unusual for milk. OPPD milk sample results for July were <LLD for all gamma emitters except K-40, which is naturally occurring.

STSO-923/Soil Jan. 2001 Lab results for Am-241 were <0.8 Bq/Kg; Control limits: 0.0 - 2.6. Results are considered a false positive as no activity was expected. OPPD does not at this time collect soil samples.

STSO-904/Soil Mar. 2001 Lab results for Bi-212 were 53.20 +/- 3.1 Bg/Kg; Control limits (which are determined by the ratio of Reported Value/EML value) were 0.45 - 1.23.

Naturally occurring radium and thorium daughters are present in the shield background and a probable cause of the higher bias seen for bismuth. OPPD does not collect soil samples at this time.

Additional Notes:

Sample STW-921/Water was provided by Environmental Resources Associates for the Interlaboratory Comparison program. Samples SPW-483/Water, and SPMI-1270/Milk, were in-house "spike" samples. Samples SPMI-3233/Milk,and SPMI-6146/Milk were in house "blank" samples. Sample STSO-923/Soil, was part of the Department of Energy's Mixed Analyte Performance Evaluation Program. Sample STSO-904/Soil was provided by the Environmental Laboratory Quality Assessment Program (EML).

Page 11 of 11

- " Environmental, Inc.

Midwest Laboratory an Allegheny Technologies Co.

700 Landwehr Road

  • Northbrook, IL 60062-2310 (847) 564-0700 fax (847) 564-4517 APPENDIX A INTERLABORATORY COMPARISON PROGRAM RESULTS NOTE: Environmental, Inc., Midwest Laboratory participates in intercomparison studies administered by Environmental Resources Associates, and serves as a replacement for studies conducted previously by the U.S. EPA Environmental Monitoring Systems Laboratory, Las Vegas, Nevada. Results are reported in Appendix A. TLD Intercomparison results, in-house spikes, blanks, duplicates and mixed analyte performance evaluation program results are also reported. Appendix A is updated four times a year; the complete Appendix is included in March, June, September and December monthly progress reports only.

January, 2001 through December, 2001

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

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

The results ir- Table A-1 were obtained through participation in the environmental sample crosscheck program for milk, water and air filters during the past twelve months. Data for previous years is available upon request.

This program was conducted by the U.S. Environmental Protection Agency Office of Research and Development National Exposure Research Laboratory Characterization Research Division-Las Vegas, Nevada.

The results in Table A-2 were obtained for Thermoluminescent Dosimeters (TLDs), via various International Intercomparisons of Environmental Dosimeters under the sponsorships listed in Table A-2. Results of crosscheck testing with Teledyne Brown Engineering are also listed.

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

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

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

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

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

Attachment A lists acceptance criteria for "spiked" samples.

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

Al

12-31-01 ATTACHMENT A ACCEPTANCE CRITERIA FOR "SPIKED" SAMPLES LABORATORY PRECISION: ONE STANDARD DEVIATION VALUES FOR VARIOUS ANALYSES' One Standard Deviation Analysis Level for single determinations Gamma Emitters 5 to 100 pCi/liter or kg 5.0 pCi/liter

> 100 pCi/liter or kg 5% of known value Strontium -89b 5 to 50 pCi/liter or kg 5.0 pCi/liter

> 50 pCi/liter or kg 10% of known value Strontium-90b 2 to 30 pCi/liter or kg 5.0 pCi/liter

> 30 pCi/liter or kg 10% of known value Potassium-40 > 0.1 g/liter or kg 5% of known value Gross alpha 20 pCi/liter 5.0 pCi/liter

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

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

169.85 x (known)"' 933

> 4,000 pCi/liter 10% of known value Radium-226,-228 0.1 pCi/liter 15% of known value Plutonium 0.1 pCi/liter, gram, or sample 10% of known value Iodine-131, 55 pCi/liter 6.0 pCi/liter Iodine-1 29b > 55 pCi/liter 10% of known value Uranium-238, 35 pCi/liter 6.0 pCi/liter Nickel-63' > 35 pCi/liter 15% of known value Technetium-99b Iron-55b 50 to 100 pCi/liter 10 pCi/liter

> 100 pCi/liter 10% of known value Others' 20% of known value From EPA publication, "Environmental Radioactivity Laboratory Intercomparison Studies Program, Fiscal Year, 1981-1982, EPA-600/4-81-004.

b Laboratory limit.

A2

Table A-1. Interlaboratory Comparison Crosscheck program, Environmental Resource Associates (ERA)a.

Concentration in pCi/L" Lab Sample Date Control Code Type Collected Analysis Laboratory resultc ERA Result' Limits STnW-897 WATER Jan, 2001 Gr. Alpha 31.9+/-2.1 45.7+/-11.4 25.9 - 65.5 N-897 WATER Jan, 2001 Gr. Beta 25.3+/-2.7 16.7+/- 5.0 8.0 - 25.4 STiW-900 WATER Feb, 2001 1-131 27.2+/- 0.8 28.3 +/- 3.0 23.1 - 33.5 ST\ W-902 WATER Feb, 2001 Ra-226 4.0+/- 0.1 4.7+/- 0.7 3.4 - 5.9 STVWV-902 WATER Feb, 2001 Ra-228 13.8+/- 0.4 14.4+/-3.6 8.2 - 20.6 ST\ W-902 WATER Feb, 2001 Uranium 17.0+/-0.3 20.4 +/- 3.0 15.2 - 25.6 STVN-903 WATER Mar, 2001 H-3 17,400.0+/-69.7 17,800.0 +/- 1,780.0 14,700. - 20,900.0 ST\V-917 WATER Apr, 2001 Gr. Alpha 57.4+/-3.5 56.0+/-14.0 31.8- 80.2 STI V-917 WATER Apr, 2001 Ra-226 13.5+/- 0.4 17.7+/-2.7 13.1 -22.3 ST' V-917 WATER Apr, 2001 Ra-228 10.1 +/-0.6 8.1 +/-2.0 4.6- 11.6 STmV-917 WATER Apr, 2001 Uranium 14.2+/-0.2 15.6 +/-3.0 10.4-20.8 STi V-918 WATER Apr, 2001 Co-60 27.9+/- 1.4 26.4 +/- 5.0 17.7-35.1 STVV-918 WATER Apr, 2001 Cs-134 16.0+/- 0.4 16.9_+/- 5.0 8.2 - 25.6 STVV-918 WATER Apr, 2001 Cs-1 37 195.4+/- 1.5 186.0+/-9.3 170.0 - 202.0 STVV-918 WATER Apr, 2001 Gr. Beta 340.0+/- 51.0 343.0 +/-1.7 252.0 - 428.0 STi V-918 WATER Apr, 2001 Sr-89 62.8+/- 5.7 64.1 +/-5.0 55.5 - 72.8 STvN-918 WATER Apr, 2001 Sr-90 34.2+/- 1.6 33.8 +/- 5.0 25.1 -42.5 STVN-919 WATER Jun, 2001 Ba-133 37.8+/- 1.2 36.0 +/- 5.0 27.3 - 44.7 STV/-919 WATER Jun, 2001 Co-60 49.9+/- 0.7 46.8+/- 5.0 38.1 - 55.5 STVV-919 WATER Jun, 2001 Cs-134 16.0+/-1.4 15.9+/-+5.0 7.2 - 24.6 STV N-919 WATER Jun, 2001 Cs-137 208.0+/- 1.7 197.0 +/- 9.9 180.0 - 214.0 STvV-919 WATER Jun, 2001 Zn-65 37.8+/-0.7 36.2 +/- 5.0 27.5 - 44.9 STV /-920 WATER Jun, 2001 Ra-226 14.6+/- 0.4 15.4+/-2.3 11.4- 19.4 STv /-920 WATER Jun, 2001 Ra-228 6.2 +/- 0.2 4.5+/-1.1 2.6 - 6.5 STV1-920 WATER Jun, 2001 Uranium 49.0+/- 1.0 55.7 +/- 5.6 46.1 - 65.3 STY1-921 WATER Jul, 2001 Sr-89 19.8+/- 1.5 31.2 +/- 5.0 22.5 - 39.9 Delay in processing may have attributed to deviation.

Result of reanalysis; Sr-89, 35.3 +/- 4.4 pCi/L. Sr-90, 25.0 +/- 2.8 pCi/L.

STm V-921 WATER Jul, 2001 Sr-90 26.3+/- 1.1 25.9 +/- 5.0 .17.2 - 34.6 STV/-922 WATER Jul, 2001 Gr. Alpha 23.3+/-1.9 17.8+/-5.0 9.1 - 26.5 STW/-922 WATER Jul, 2001 Gr. Beta 48.5+/-4.6 53.0 +/-10.0 35.7 - 70.3 STA V-924 WATER Aug, 2001 H-3 2,680.0+/-41.9 2,730.0 +/- 356.0 2,110.0 - 3,350.0 ST\AV-931 WATER Sep, 2001 Ra-226 10.9+/- 0.2 10.8+/- 1.6 8.0- 13.6 STWV-931 WATER Sep, 2001 Ra-228 9.7+/- 1.1 9.0+/- 2.2 5.1 - 12.8 STW\1-931 WATER Sep, 2001 Uranium 11.2+/- 0.1 13.1 +/-3.0 7.9 - 18.3 STW\1-932 WATER Oct, 2001 1-131 7.7+/-0.3 7.7+/- 2.0 4.2- 11.2 STW\1-933 WATER Oct, 2001 Gr. Alpha 82.2 +/-4.0 97.5 +/- 24.4 55.3 - 140.0 ST" '-933 WATER Oct, 2001 Ra-226 9.5+/- 1.2 10.8+/- 1.6 8.0 - 13.6 Al-i

Table A-1. Interlaboratory Comparison Crosscheck program, Environmental Resource Associates (ERA)a.

Concentration in pCi/Lb Lab Sample Date Control Code Type Collected Analysis Laboratory result' ERA Result8 Limits STW-933 WATER Oct, 2001 Ra-228 17.0+/- 0.8 15.6 +/- 3.9 8.9-22.4 STW-933 WATER Oct, 2001 Uranium 32.2 +/- 1.4 37.2 +/- 3.7 30.7 - 43.6 STW-934 WATER Oct, 2001 Co-60 82.4 +/- 0.9 78.4 +/- 5.0 69.7 - 87.1 STW-934 WATER Oct, 2001 Cs-1 34 52.2 +/- 1.3 54.1 +/- 5.0 45.4 - 62.8 STW-934 WATER Oct, 2001 Cs-137 39.4 +/- 0.6 37.9 +/- 5.0 26.3 - 43.7 STW-934 WATER Oct, 2001 Gr. Beta 166.0+/-7.1 192.0+/-28.8 142.0 - 242.0 STW-934 WATER Oct, 2001 Sr-89 12.8+/-0.8 16.7+/- 5.0 8.0-25.4 STW-934 WATER Oct, 2001 Sr-90 6.8+/- 0.7 7.7_+/-5.0 -1.0- 16.4 STW-935 WATER Oct, 2001 Gr. Alpha 63.5+/-2.5 64.0+/- 16.0 36.5-91.5 STW-935 WATER Oct, 2001 Gr. Beta 26.0+/- 1.2 21.5+/- 5.0 12.8-30.2 STW-938 WATER Nov, 2001 Ba-133 66.7+/- 1.2 69.3+/- 6.9 57.5-81.1 STW-938 WATER Nov, 2001 Co-60 59.3+/-0.6 59.7+/-5.0 51.0-68.4 STW-938 WATER Nov, 2001 Cs-134 86.7+/- 1.5 93.9+/-5.0 85.2 - 103.0 STW-938 WATER Nov, 2001 Cs-1 37 45.0+/- 1.0 42.0+/- 5.0 33.3-50.7 STW-938 WATER Nov, 2001 Zn-65 80.7 +/- 0.6 77.3 +/- 7.7 63.9 - 90.7 "Results obtained by Environmental, Inc., Midwest Laboratory as a participant in the environmental samples crosscheck program operated by Environmental Resources Associates (ERA).

'All results are in pCi/L, except for elemental potassium (K) data in milk, which are in mg/L; air filter samples, which are in pCi/Filter.

C Unless otherwise indicated, the laboratory result is given as the mean +/- standard deviation for three determinations.

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

Al -2

Table A-2. Crosscheck program results; Thermoluminescent Dosimeters. (TLDs).

mR Lab Known Lab result Code TLD Type Date Measurement Value +/- 2 Sigma Control Limits Teledyne Brown Engineering 2000-1 LiF-100 Chips Mar, 2000 Reader 1, #1 17.8 14.4 +/- 0.2 12.46 - 23.14 2000-1 LiF-100 Chips Mar, 2000 Reader 1, #2 35.5 32.4+/- 0.1 24.85 - 46.15 2000-1 LiF-100 Chips Mar, 2000 Reader 1, #3 62.2 61.8+/-0.9 43.54 - 80.86 Teledyne Brown Engineering 2000-2 CaSO,: Dy Cards Mar, 2000 Reader 1, #1 17.8 21.3 +/- 0.3 12.46 - 23.14 2000-2 CaSO,: Dy Cards Mar, 2000 Reader 1, #2 35.5 40.1 +/-1.9 24.85 - 46.15 2000-2 CaSO,: Dy-Cards Mar, 2000 Reader 1, #3 62.2 69.9 +/- 3.5 43.54 - 80.86 Chips and cards irradiated by Teledyne Brown Engineering, Westwood, New Jersey, in March of 2000.

12th International Intercomparison 022-1 CaSO,: Dy Cards Jun, 2000 Field 161.0 184.9+/- 1.9 112.70 - 209.30 022-1 CaSO4 : Dy Cards Jun, 2000 Field 1 548.0 502.2 +/- 1.7 383.60- 712.40 022-1 CaSO,: Dy Cards Jun, 2000 Field 2 391.0 412.0 +/- 2.9 273.70 - 508.30 022-1 CaSO4 : Dy Cards Jun, 2000 Field 3 623.0 643.2 +/- 2.9 436.10 - 809.90 022-1 CaSO4 : Dy Cards Jun, 2000 Lab, 1 391.0 442.8 +/- 2.5 273.70 - 508.30 Environmental, Inc.

2001-1 CaSO,: Dy Cards Dec, 2001 Reader 1, #1 4.0 3.7+/-0.1 2.79-5.17 2001-1 CaSO4 : Dy Cards Dec, 2001 Reader 1,#1 4.0 3.4 +/-0.1 2.79-5.17 2001-1 CaSO,: Dy Cards Dec, 2001 Reader 1, #2 7.1 7.9 +/- 0.2 4.95 -9.19 2001-1 CaSO,: Dy Cards Dec, 2001 Reader 1 #2 7.1 7.6+/- 0.3 4.95-9.19 2001-1 CaSO4 : Dy Cards Dec, 2001 Reader 1,#3 15.9 18.6+/-0.4 11.13 - 20.67 2001-1 CaSO,: Dy Cards Dec, 2001 Reader 1 #3 15.9 19.6+/-0.1 11.13 - 20.67 2001-1 CaSO,: Dy Cards Dec, 2001 Reader 1, #4 63.6 78.2 +/- 1.2 44.53 - 82.69 2001-1 CaSO,: Dy Cards Dec, 2001 Reader 1, #4 63.6 79.9+/- 2.5 44.53 - 82.69 A2-1

Table A-3. In-house "spike" samples.

Concentration in pCi/La Lab Sample Date Laboratory results Known Controlc Code Type Collected Analysis 2s, n=lb Activity Limits SPAP-477 Air Filter Jan, 2001 Cs-137 1.76+/- 0.02 1.68 1.01-2.35 SPW-479 Water Jan, 2001 H-3 54702.00 +/- 644.00 54549.1DO 43639.20 - 65458.80 SPW-481 Water Jan, 2001 Gr. Alpha 58.08+/-2.79 69.14 34.57 -103.71 SPW-481 Water Jan, 2001 Gr. Beta 213.83 +/- 3.07 220.216 198.23- 242.29 SPW-482 Water Jan, 2001 Gr. Alpha 51.77+/-2.18 69.14 34.57-103.71 SPW-482 Water Jan, 2001 Gr. Beta 202.48+/-2.98 220.2(6 198.23- 242.29 SPW-483 Water Jan, 2001 Ra-226 20.11 +/- 0.34 20.86 14.60- 27.12 SPW-483 Water Jan, 2001 Ra-228 10.55+/-2.02 19.43 13.60 - 25.26 Sample was lost during analysis. Insufficient sample available to perform reanalysis SPW-485 Water Jan, 2001 Co-60 33.53+/-3.40 31.13 21.13 -41.13 SPW-485 Water Jan, 2001 Cs-1 34 32.80+/-2.54 30.81 20.81 - 40.81 SPW-485 Water Jan, 2001 Cs-1 37 42.10+/- 5.60 36.00 26.00 - 46.00 SPW-485 Water Jan, 2001 Sr-90 154.34+/-3.49 137.6E 110.13-165.19 SPAP-754 Air Filter Jan, 2001 Gr. Beta 8.53 +/- 0.02 7.88 -2.12 - 17.88 SPW-1 037 Water Feb, 2001 U-233/4 3.74+/-0.10 4.17 2.50- 5.84 SPW-1 037 Water Feb, 2001 U-238 3.81 +/-0.10 4.17 -7.83- 16.17 SPW-1224 Water Feb, 2001 Ra-226 21.25+/-0.50 20.68 14.48 - 26.88 SPW-1224 Water Feb, 2001 Ra-228 21.76+/-2.65 19.27 13.49 - 25.05 SPW-1 225 Water Feb, 2001 Gr. Alpha 71.87+/-3.07 69.14 34.57 - 103.71 SPW-1225 Water Feb, 2001 Gr. Beta 36.30+/-1.47 28.75 18.75- 38.75 SPW-1272 Water Feb, 2001 1-131 56.82 +/-0.71 63.05 50.44 - 75.66 SPW-1272 Water Feb, 2001 1-131(g) 65.69+/- 10.21 63.05 53.05 - 73.05 SPVE-1274 Vegetation Feb, 2001 1-131(g) 0.78+/-0.05 0.76 0.45-1.06 SPCH-1276 Charcoal Feb, 2001 1-131(g) 1.57+/-0.05 1.58 0.95-2.21 SPM1-1270 Milk Mar, 2001 Cs-134 31.89+/-4.71 29.77 19.77 - 39.77 SPM1-1270 Milk Mar, 2001 Cs-137 46.61 +/- 8.81 35.90 25.90 - 45.90 The Cs 137 spike is suspect; A new cesium spike has been prepared. Reference to SPMI-3232.

SPMI-1270 Milk Mar, 2001 1-131(g) 81.92+/-10.80 81.95 71.95- 91.95 SPU-2901 Urine Mar, 2001 H-3 51512.00+/-1369.00 50189.0 0 40151.20-60226.80 SPW-2161 Water Mar, 2001 Ra-228 29.92+/- 5.13 31.75 22.23 - 41.28 SPU-3128 Urine Apr, 2001 H-3 2065.00+/-408.00 2008.OCP 1317.37- 2698.63 SPW-3129 Water Apr, 2001 Gr. Alpha 37.94+/-2.42 34.57 17.29-51.86 A3-1

Table A-3. In-house "spike" samples.

Concentration in pCi/LL Lab Sample Date Laboratory results Known Controlc Code Type Collected Analysis 2s, n=l b Activity Limits SPW-3129 Water Apr, 2001 Gr. Beta 117.83+/-2.37 109.46 98.51 - 120.41 SPAP-3508 Air Filter Apr, 2001 Gr. Beta 0.80 +/- 0.01 0.78 -9.22 - 10.78 SPMI-3232 Milk Apr, 2001 Cs-1 34 32.69 +/- 6.50 33.96 23.96 - 43.96 SPMI-3232 Milk Apr, 2001 Cs-1 37 44.20 +/- 9.08 35.79 25.79 - 45.79 SPMI-3232 Milk Apr, 2001 1-131 48.05 +/- 0.90 56.68 45.34 - 68.02 SPMI-3232 Milk Apr, 2001 1-131(g) 55.64+/-11.39 56.68 46.68 - 66.68 SPMI-3232 Milk Apr, 2001 Sr-90 143.77 +/- 3.04 136.82 109.46 - 164.18 SPSO-3356 Soil Apr, 2001 Co-60 18.49+/- 0.21 19.57 9.57 - 29.57 SPSO-3356 Soil Apr, 2001 Cs-137 18.71 +/-0.24 16.61 6.61 - 26.61 SPAP-3359 Air Filter Apr, 2001 Cs-1 37 1.80+/- 0.01 1.67 1.00-2.34 SPW-3376 Water Apr, 2001 Co-60 48.17+/-4.85 45.19 35.19 - 55.19 SPW-3376 Water Apr, 2001 Cs-1 34 37.14 +/- 3.90 33.96 23.96 - 43.96 SPW-3376 Water Apr, 2001 Sr-90 159.84 +/- 3.42 136.82 109.46 - 164.18 SPW-3377 Water Apr, 2001 1-131 68.60 +/- 2.63 85.02 68.02 - 102.02 SPW-3129/1 Water May, 2001 Gr. Alpha 37.94 +/- 2.42 34.57 17.29 - 51.86 SPW-3129/1 Water May, 2001 Gr. Beta 117.83+/-2.37 109.46 98.51 - 120.41 SPW-3129/2 Water Jun, 2001 Gr. Alpha 34.42 +/- 2.14 34.57 17.29 - 51.86 SPW-3129/2 Water Jun, 2001 Gr. Beta 119.99+/-2.45 109.46 98.51 - 120.41 SPVE-3303 Vegetation Jun, 2001 1-131(g) 0.81 +/- 0.03 0.86 0.51 -1.20 SPSO-5701 Soil Jul, 2001 Co-60 17.42+/-0.19 19.05 9.05 - 29.05 SPSO-5701 Soil Jul, 2001 Cs-1 37 16.03 +/- 0.22 16.52 6.52 - 26.52 SPW-5779 Water Jul, 2001 Co-60 250.05 +/- 18.63 233.26 209.93 - 256.59 SPW-5779 Water Jul, 2001 Cs-137 178.68+/- 19.89 175.91 158.32 - 193.50 SPW-5779 Water Jul, 2001 Sr-90 72.12 +/- 2.24 68.12 54.50 - 81.74 SPF-5781 Fish Jul, 2001 Co-60 1.87 +/- 0.08 1.79 1.07 - 2.51 SPF-5781 Fish Jul, 2001 Cs-1 37 1.43 +/- 0.07 1.39 0.83 - 1.95 SPW-5937 Water Jul, 2001 H-3 51177.00 +/- 631.00 50189.00 40151.20 - 60226.80 SPW-59441 Water Jul, 2001 Ra-226 36.62 +/-1.74 34.46 24.12 - 44.80 SPW-59441 Water Jul, 2001 Ra-228 41.46 +/- 6.44 36.06 25.24 - 46.88 SPAP-5703 Air Filter Jul, 2001 Cs-1 37 1.81 +/-0.02 1.67 1.00 -2.34 SPW-3129/3 Water Jul, 2001 Gr. Alpha 35.31 +/- 3.04 34.75 17.38 - 52.13 A3-2

Table A-3. In-house "spike" samples.

Concentration in pCi/La Lab Sample Date Laboratory results Known Control' Code Type Collected Analysis 2s, n=lb Activity Limits SPW-3129/3 Water Jul, 2001 Gr. Beta 113.28+/-3.65 109.46 98.51 - 120.41 SPMI-6145 Milk Jul, 2001 Cs-137 188.45+/- 19.10 175.91 158.32 - 193.50 SPW-6604 Water Jul, 2001 Gr. Alpha 35.36 +/- 1.94 34.57 17.29 - 51.86 SPW-6604 Water Jul, 2001 Gr. Beta 112.56+/-2.46 108.82 97.94- 119.70 SPW-9008 Water Oct, 2001 H-3 48285.00+/- 606.10 50189.00 40151.20 - 60226.80 SPAP-9010 Air Filter Oct, 2001 Cs-137 1.91 +/- 0.01 1.67 1.00-2.34 SPW-10723 Water Dec, 2001 U-233/4 40.12+/- 1.09 41.73 25.04 - 58.42 SPW-10723 Water Dec, 2001 U-238 40.16+/- 1.09 41.73 29.21 - 54.25 SPAP-11550 Air Filter Dec, 2001 Gr. Beta 1.58+/-0.02 1.56 -8.44- 11.56 SPW-11757 Water Dec, 2001 Co-60 43.82 +/- 3.14 41.36 31.36 - 51.36 SPW-11757 Water Dec, 2001 Cs-134 24.11 +/-2.42 22.59 12.59 - 32.59 SPW-11757 Water Dec, 2001 Cs-1 37 52.11 +/- 4.40 50.89 40.89 - 60.89 SPMI-11759 Milk Dec, 2001 Cs-134 28.03+/-2.64 27.10 17.10- 37.10 SPMI-1 1759 Milk Dec, 2001 Cs-1 37 54.59 +/- 5.08 50.89 40.89 - 60.89 SPF-11761 Fish Dec, 2001 Cs-134 0.94 +/- 0.02 0.90 0.54-1.26 SPF-11761 Fish Dec, 2001 Cs-137 1.43 +/- 0.04 1.43 0.86 -2.00 a All results are in pCi/L, except for elemental potassium (K) in milk, which are in mg/L.; air filter samples, which are in pCi/Filter; and food products, which are in pCi/kg.

'Results are based on single determinations.

' Control limits are based on Attachment A, Page A2 of t NOTE: For fish, Jello is used for the spike matrix. For vegetation, coleslaw is used for the spike matrix.

A3-3

Table A-4. In-house "blank" samples.

Concentration pCi/La.

Laboratory results Acceptance Lab Sample Sample (4.66 Sigma) Criteria samples.

Code Type "blank" Date Analysis LLD Activityb (4.66 Sigma)

A-4. In-house SPAP-478 Table AIR FILTER Jan 2001 Co-60 < 1.12 <100.0 SPAP-478 AIR FILTER Jan 2001 Cs-1 34 < 1.66 <100.0 SPAP-478 AIR FILTER Jan 2001 Cs-137 < 2.46 <100.0 SPW-480 WATER Jan 2001 H-3 < 162.00 -1.86 +/-80.40 <200.0 SPW-484 WATER Jan 2001 Gr. Alpha < 0.68 <1.0 SPW-484 WATER Jan 2001 Gr. Beta < 1.35 <3.2 SPW-484 WATER Jan 2001 Ra-226 < 0.02 0.03 +/-0.01 <1.0 SPW-484 WATER Jan 2001 Ra-228 < 0.97 0.43 +/- 0.50 <2.0 SPW-486 WATER Jan 2001 Co-60 < 2.68 <10.0 SPW-486 WATER Jan 2001 Cs-1 34 < 3.46 <10.0 SPW-486 WATER Jan 2001 Cs-137 < 5.43 <10.0 SPW-486 WATER Jan 2001 Sr-90 < 0.65 0.06 +/- 0.31 <1.0 SPAP-755 AIR FILTER Jan 2001 Gr. Beta < 1.60 0.16 +/- 0.90 <3.2 SPW-1 038 WATER Feb 2001 U-238 < 0.03 <1.0 SPW-1038 WATER Feb 2001 U-238 < 0.00 <1.0 SPW-1223 WATER Feb 2001 Gr. Alpha < 0.46 <1.0 SPW-1223 WATER Feb 2001 Gr. Beta < 1.50 <3.2 SPW-1223 WATER Feb 2001 Ra-226 < 0.02 0.03 +/-0.01 <1.0 SPW-1 223 WATER Feb 2001 Ra-228 < 0.95 0.45 +/- 0.49 <2.0 SPMI-1268 MILK Feb 2001 Cs-1 34 < 5.86 <10.0 SPMI-1268 MILK Feb 2001 Cs-1 37 < 3.02 <10.0 SPMI-1268 MILK Feb 2001 1-131(g) < 7.46 <20.0 SPW-1271 WATER Feb 2001 Co-60 < 1.06 <10.0 SPW-1 271 WATER Feb 2001 Cs-134 < 2.61 <10.0 SPW-1271 WATER Feb 2001 Cs-137 < 2.37 <10.0 SPVE-1273 VEGETATION Feb 2001 Cs-1 34 < 10.04 <100.0 SPVE-1273 VEGETATION Feb 2001 Cs-1 37 < 6.00 <100.0 SPCH-1275 CHARCOAL Feb 2001 1-131(g) < 0.01 <9.6 CANISTER SPW-2164 WATER Mar 2001 Ra-226 < 0.02 0.05 +/- 0.01 <1.0 SPU-3126 URINE Apr2001 H-3 < 642.00 -66.00 +/- 335.00 <200.0 2.0 ml. sample volume.

A4-1

Table A-4. In-house "blank" samples.

Concentration pCi/La.

Lab Laboratory results Acceptance Sample Sample (4.66 Sigma) Criteria Code Type Date Analysis LLD Activity' (4.66 Sigma)

SPDW-3130 WATER Apr2001 Gr. Alpha < 0.54 0.04 +/- 0.38 <1.0 SPDW-3130 WATER Apr 2001 Gr. Beta < 1.46 0.67 +/- 1.04 <3.2 SPMI-3233 MILK Apr2001 Cs-1 37 < 2.66 <10.0 SPMI-3233 MILK Apr2001 1-131 < 0.26 -0.06 +/-0.14 <0.5 SPMI-3233 MILK Apr2001 1-131(g) < 3.91 <20.0 SPMI-3233 MILK Apr2001 Sr-89 < 0.79 -0.32 +/- 0.79 <5.0 SPMI-3233 MILK Apr2001 Sr-90 1.18 +/-0.35 <1.0 Low levels of Sr-90 are still detected in the environment. A concentration of (1-5 pCi/L) in milk is not unusual.

SPSO-3357 SOIL Apr 2001 Cs-1 34 < 14.77 <100.0 SPSO-3357 SOIL Apr 2001 Cs-137 < 11.72 <100.0 SPAP-3358 AIR FILTER Apr 2001 Cs-137 < 0.55 <100.0 SPW-3375 WATER Apr 2001 Co-60 < 2.90 <10.0 SPW-3375 WATER Apr 2001 Cs-134 < 3.71 <10.0 SPW-3375 WATER Apr 2001 1-131 (g) < 0.39 0.02 +/- 0.22 <20.0 SPW-3375 WATER Apr 2001 Sr-90 < 0.56 0.05 +/- 0.27 <1.0 SPDW-3130 WATER May 2001 Gr. Alpha < 0.45 0.15 +/- 0.34 <1.0 SPDW-3130 WATER May 2001 Gr. Beta < 1.26 0.34 +/- 0.95 <3.2 SPDW-3130 WATER Jun 2001 Gr. Alpha < 0.44 0.09 +/- 0.32 <1.0 SPDW-3130 WATER Jun 2001 Gr. Beta < 1.46 0.66 +/- 1.04 <3.2 SPVE-3304 VEGETATION Jun 2001 Co-60 < 7.06 <100.0 SPVE-3304 VEGETATION Jun 2001 Cs-1 34 < 11.56 <100.0 SPVE-3304 VEGETATION Jun 2001 Cs-1 37 < 8.30 <100.0 SPSO-5702 SOIL Jul 2001 Co-60 < 12.80 <100.0 SPSO-5702 SOIL Jul 2001 Cs-134 < 13.96 < 100.0 SPSO-5702 SOIL Jul 2001 Cs-137 <8.10 <100.0 SPAP-5704 AIR FILTER Jul 2001 Co-60 < 0.79 <100.0 SPAP-5704 AIR FILTER Jul 2001 Cs-1 34 < 0.84 <100.0 SPAP-5704 AIR FILTER Jul 2001 Cs-137 < 0.60 <100.0 SPW-5780 WATER Jul 2001 Co-60 < 1.86 <10.0 SPW-5780 WATER Jul 2001 Cs-1 34 < 2.46 <10.0 SPW-5780 WATER Jul 2001 Cs-1 37 < 3.77 <10.0 A4-2

Table A-4. In-house "blank" samples.

Concentration pCi/La.

Lab Laboratory results Acceptance Sample Sample (4.66 Sigma) Criteria Code I ype uate Analysis LLD Activity' (4.66 Sigma)

SPF-5782 FISH Jul 2001 Co-60 <5.'64 <100.0 SPF-5782 FISH Jul 2001 Cs-1 34 < 7.,51

<100.0 SPW-5938 WATER Jul 2001 H-3 < 163. 22 -16.21 +/-85.07 <200.0 SPW-59451 WATER Jul 2001 Ra-226 < 0.C 01 0.04 +/-0.01 <1.0 SPW-59451 WATER Jul 2001 Ra-228 < 0.777 0.70 +/- 0.44 <2.0 SPDW-3130 WATER Jul 2001 Gr. Alpha < 0.554 0.36 +/- 0.40 <1.0 SPDW-3130 WATER Jul 2001 Gr. Beta < 2.2?7 -0.78 +/- 1.35 <3.2 SPMI-6146 MILK Jul 2001 Sr-90 < 0.550 1.09 +/- 0.36 <1.0 Low levels of Sr-90 are still detected in the environment. A concentrattion of (1-5 pCi/L) in milk is not unusual.

SPW-6605 WATER Jul 2001 Gr. Beta < 1-1334 0.55 +/- 1.01 <3.2 SPW-9009 WATER Oct 2001 H-3 < 160.0 )0 -56.70 +/- 76.50 <200.0 SPAP-9011 AIR FILTER Oct 2001 Co-60

  • 0.7 76

<100.0 SPAP-9011 AIR FILTER Oct 2001 Cs-137 <0.5i8 <100.0 SPW-5780 WATER Oct 2001 Sr-90

  • 0.5i4 0.36 +/- 0.30 <1.0 SPW-1 0724 WATER Dec 2001 U-238 <0.1 3 0.04 +/- 0.10 <1.0 SPAP-1 1549 AIR FILTER Dec 2001 Gr. Beta
  • 0.0)0 0.01 +/-0.00 <3.2 SPW-1 1756 WATER Dec 2001 Cs-1 37 < 2.6 2 <10.0 SPMI-1 1758 MILK Dec 2001 Cs-137 < 4.0 0 <10.0 SPMI-1 1758 MILK Dec 2001 1-131(g) < 16.5 7 <20.0 SPF-1 1760 FISH Dec 2001 Cs-1 37 < 7.96 <100.0

" Liquid sample results are reported in pCi/Liter, air filter sample results are in pCi/filter, charcoal sample results are in pCi/charcoal, and solid sample results are in pCi/kilogram.

b The activity reported is the net activity result.

A4-3

Table A-5. In-house "duplicate" samples.

Concentration in pCi/La Lab Sample First Second Averaged Codes Analysis NewtReultu eeSUSUlt AP-10675, 10676 Jan, 2001 Be-7 0.06 +/- 0.02 0.06 +/- 0.02 0.06 +/- 0.01 AP-10803, 10804 Jan, 2001 Be-7 0.04 +/- 0.01 0.04 +/- 0.01 0.04 +/- 0.01 AP-10833, 10834 Jan, 2001 Be-7 0.04 +/- 0.01 0.04 +/- 0.01 0.04 +/- 0.01 WW-51, 52 Jan, 2001 H-3 362.60 +/- 94.70 417.20 +/- 96.80 389.90 +/- 67.71 MI-72, 73 Jan, 2001 K-40 1,566.90 +/- 196.80 1,372.40 +/-152.50 1,469.65+/-124.49 MI-96, 97 Jan, 2001 K-40 1,418.30+/- 117.80 1,545.70 +/-162.50 1,482.00 +/-100.35 U-858, 859 Jan, 2001 Gr. Beta 2.17 +/-2.47 4.23 +/- 2.74 3.20 +/- 1.84 MI-389, 390 Jan, 2001 K-40 1,489.20+/-141.10 1,463.30+/- 168.20 1,476.25 +/- 109.77 DW-879, 880 Jan, 2001 Gr. Beta 2.63 +/- 0.52 2.37 +/- 0.50 2.50 +/- 0.36 SWU-813, 814 Jan, 2001 Gr. Beta 2.48 +/- 0.58 2.46 +/- 0.63 2.47 +/- 0.43 MI-708, 709 Feb, 2001 K-40 1,179.40+/-103.00 1,280.40 +/- 90.26 1,229.90 +/- 68.48 MI-740, 741 Feb, 2001 1-131 0.01 +/-0.26 -0.12+/- 0.26 -0.05+/-0.18 MI-740, 741 Feb, 2001 K-40 1,434.00 +/- 156.50 1,435.00+/- 126.10 1,434.50 +/- 100.49 MI-789, 790 Feb, 2001 K-40 1,584.30 +/- 158.80 1,390.70 +/- 136.50 1,487.50 +/- 104.70 DW-901, 902 Feb, 2001 Gr. Beta 4.67+/-1.08 5.54 +1.13 5.11 +/-0.78 SWU-1544, 1545 Feb, 2001 Gr. Beta 3.13+/- 0.63 2.33 +/- 0.52 2.73 +/- 0.41 DW-1426, 1427 Feb, 2001 Gr. Beta 2.05 +/- 0.92 2.34 +/- 0.93 2.20 +/- 0.65 DW-1426, 1427 Feb, 2001 H-3 42.60 +/- 94.23 131.31 +/- 95.34 86.96 +/- 67.02 WW-1476, 1477 Feb, 2001 H-3 53.06 +/- 65.79 53.06 +/- 93.03 53.06 +/- 56.97 MI-1523, 1524 Mar, 2001 1-131 -0.01 +/- 0.20 -0.10+/-0.37 -0.06 +/- 0.21 MI-1523, 1524 Mar, 2001 K-40 1,396.00 +/- 184.80 1,576.00 +/- 184.90 1,486.00+/- 130.71 MI-1572, 1573 Mar, 2001 K-40 1,499.20 +/-113.30 1,326.00+ 118.80 1,412.60 +/- 82.08 MI-1572, 1573 Mar, 2001 Sr-90 1.65 +/- 0.44 1.51 +/- 0.52 1.58 +/- 0.34 SW-1648, 1649 Mar, 2001 K-40 297.80 +/- 67.20 344.80 +/- 82.30 321.30 +/- 53.13 MI-1800, 1801 Mar, 2001 K-40 1,425.80 +/- 183.30 1,372.20 +/-119.70 1,399.00 +/-109.46 SW-1779, 1780 Mar, 2001 Gr. Alpha 2.22 +/- 0.73 2.14+/-0.69 2.18+/- 0.50 SW-1779, 1780 Mar, 2001 Gr. Beta 6.28 +/- 0.74 6.62 +/- 0.70 6.45 +/- 0.51 MI-1447, 1448 Mar, 2001 1-131 -0.65 +/- 0.27 0.13+/- 0.55 -0.26 +/- 0.31 MI-1447, 1448 Mar, 2001 K-40 1,496.20+/- 155.40 1,413.40+/- 169.60 1,454.80 +/- 115.01 WW-2115, 2116 Mar, 2001 H-3 540.04+/-111.84 500.85 +/-110.46 520.44 +/- 78.59 SW-1698, 1699 Mar, 2001 Gr. Beta 6.07 +/- 1.75 5.57 +/- 1.85 5.82 +/- 1.27 DW-2272, 2273 Mar, 2001 Gr. Beta 2.10 +/- 0.86 1.63 +/- 0.83 1.87 +/- 0.60 WW-2356, 2357 Mar, 2001 Gr. Beta 1.22 +/- 0.50 1.32 +/- 0.47 1.27 +/- 0.35 AP-2812, 2813 Mar, 2001 Be-7 0.07 +/- 0.02 0.05 +/- 0.01 0.06 +/- 0.01 AP-2812, 2813 Mar, 2001 Be-7 0.07 +/- 0.02 0.05 +/- 0.01 0.06 +/- 0.01 LW-2217, 2218 Mar, 2001 Gr. Beta 1.85 +/- 0.51 2.23 +/- 0.55 2.04 +/- 0.37 A5-1

Table A-5. In-house "duplicate" samples.

Concentration in pCi/La Lab Sample First n*÷4 Second Averaged Codes Mar, 2001 Analysis Result Result Result AP-2833, 2834 Mar, 2001 Be-7 0.04 +/- 0.01 0.06 +/- 0.02 0.05 +/- 0.01 AP-3038, 3039 Mar, 2001 Be-7 0.07 +/- 0.02 0.07 +/- 0.02 0.07 +/- 0.01 AP-3038, 3039 Mar, 2001 Be-7 0.06 +/- 0.02 0.07 +/- 0.01 0.07+/-0.01 DW-2398, 2399 Mar, 2001 Gr. Beta 1.58 +/- 0.89 1.81 +/-0.88 1.69 +/- 0.63 LW-2467, 2468 Mar, 2001 Gr. Beta 2.52 +/- 0.53 2.42 +/- 0.53 2.47 +/- 0.37 MI-2446, 2447 Apr, 2001 K-40 1,285.40+/-177.10 1,376.00 +/- 175.90 1,330.70+/-124.81 AP-3017, 3018 Apr, 2001 Be-7 0.05 +/- 0.01 0.05 +/- 0.01 0.05 +/- 0.00 SW-2423, 2424 Apr, 2001 K-40 255.60 +/- 59.80 268.40 +/- 65.40 262.00 +/- 44.31 BS-3103, 3104 Apr, 2001 Gr. Beta 7.99 +/- 1.80 8.17+/- 1.73 8.08 +/-1.25 SWU-3239, 3240 Apr, 2001 Gr. Beta 3.30 +/- 0.60 4.30 +/- 0.74 3.80 +/- 0.48 SS-3322, 3323 Apr, 2001 K-40 15.99 +/- 1.08 15.59+/- 1.01 15.79 +/- 0.74 W-3990, 3991 Apr, 2001 Sr-89 91.35+/- 18.94 85.29 +/- 23.99 88.32 +/- 15.28 BS-4347, 4348 Apr, 2001 K-40 3,982.40 +/- 489.60 3,255.80 +/-450.10 3,619.10+/- 332.53 BS-4347, 4348 Apr, 2001 K-40 3.26 +/- 0.45 3.98 +/- 0.49 3.62 +/- 0.33 MI-3364, 3365 May, 2001 K-40 1,325.90 +/- 160.20 1,453.20 +/- 163.00 1,389.55 +/- 114.27 SO-3385, 3386 May, 2001 Gr. Alpha 6.51 +/- 3.09 9.01 +/- 3.44 7.76 +/- 2.31 SO-3385, 3386 May, 2001 Gr. Beta 24.63+/-3.15 28.17+/-3.12 26.40 +/- 2.22 SO-3385, 3386 May, 2001 K-40 19.17+/-1.08 17.94 +/- 0.76 18.56 +/- 0.66 CL-4068, 4069 May, 2001 K-40 1.09 +/- 0.27 1.13+/--0.23 1.11 +/-0.18 MI-3475, 3476 May, 2001 Gr. Beta 1,297.10+/-114.60 1,433.60 +/-156.60 1,365.35 +/- 97.03 WW-3545, 3546 May, 2001 Gr. Beta 1.57 +/- 0.55 1.36 +/- 0.53 1.47 +/- 0.38 MI-3681, 3682 May, 2001 K-40 1,417.20+/- 125.70 1,496.20+/-124.50 1,456.70 +/- 88.46 SW-3702, 3703 May, 2001 Gr. Alpha 4.51 +/- 1.66 3.22+/- 1.55 3.87+/- 1.13 SW-3702, 3703 May, 2001 Gr. Beta 8.74+/- 1.36 7.11 +/- 1.38 7.93 +/- 0.97 BS-4021, 4022 May, 2001 Cs-137 224.30 +/- 30.20 205.90 +/- 43.00 215.10+/--26.27 BS-4021, 4022 May, 2001 H-3 842.00 +/- 47.00 860.00 +/- 48.00 851.00+/- 33.59 BS-4021, 4022 May, 2001 K-40 21,117.00+/- 953.00 21,629.00+/- 1,357.00 21,373.00 +/- 829.10 BS-4021, 4022 May, 2001 Pu-238 80.30 +/- 36.50 59.50 +/- 22.00 69.90 +/- 21.31 BS-4021, 4022 May, 2001 Pu-239/40 49.40 +/- 31.80 41.10+/- 19.60 45.25+/-18.68 BS-4021, 4022 May, 2001 Ra-226 7,436.00 +/- 577.90 9,126.00 +/- 751.90 8,281.00 +/- 474.16 BS-4021, 4022 May, 2001 Sr-90 10.60+/-2.71 16.80 +/- 3.22 13.70-+/-2.10 F-3813, 3814 May, 2001 K-40 2.10+/-0.17 2.30 +/- 0.26 2.20 +/-0.16 G-4158, 4159 May, 2001 Be-7 0.37+/- 0.13 0.41 +/--0.14 0.39+/- 0.10 SO-4179, 4180 May, 2001 Ac-228 0.45+/-0.13 0.52 +/-0.14 0.49+/-+0.10 SO-4179, 4180 May, 2001 Bi-214 0.31 +/- 0.06 0.41 +/- 0.06 0.36 +/- 0.04 SO-4179, 4180 May, 2001 Cs-137 0.46 +/- 0.05 0.47 +/- 0.04 0.47 +/- 0.03 A5-2

Table A-5. In-house "duplicate" samples.

Concentration in pCi/La Lab Sample First Second Averaged n"1*,. ~ . .il L* _ l Codes C1LU Analysis rmesuL Result result SO-4179, 4180 May, 2001 Gr. Beta 26.65 +/- 2.63 24.68 +/- 2.52 25.67 +/- 1.82 SO-4179, 4180 May, 2001 K-40 16.35 +/- 0.86 16.05 +/- 0.82 16.20 +/- 0.59 SO-4179, 4180 May, 2001 Pb-212 0.35 +/- 0.04 0.43 +/- 0.05 0.39 +/- 0.03 SO-4179, 4180 May, 2001 Ra-226 0.56 +/- 0.98 1.03 +/- 0.31 0.79 +/- 0.51 SO-4179, 4180 May, 2001 TI-208 0.14+/- 0.03 0.17+/- 0.03 0.15+/- 0.02 BS-4233, 4234 May, 2001 Cs-1 37 0.03 +/- 0.01 0.03 +/- 0.02 0.03 +/- 0.01 BS-4233, 4234 May, 2001 K-40 8.18+/- 0.48 7.80 +/- 0.58 7.99 +/- 0.38 SWU-4376, 4377 May, 2001 Gr. Beta 2.58 +/- 0.55 2.94 +/- 0.58 2.76 +/- 0.40 DW-4449, 4450 May, 2001 Gr. Beta 2.83 +/- 0.55 3.74 +/- 0.65 3.29 +/- 0.43 DW-4397, 4398 May, 2001 Gr. Beta 9.13++/-1.26 10.20 +/- 1.34 9.66 +/- 0.92 MI-4114, 4115 May, 2001 K-40 1,325.90 +/- 118.80 1,394.70+/-133.10 1,360.30 +/- 89.20 F-4284, 4285 May, 2001 K-40 2.23 +/- 0.32 2.12 +/-0.35 2.18+/- 0.24 DW-4326, 4327 Jun, 2001 Gr. Beta 2.60 +/- 0.97 1.47 +/- 0.83 2.04 +/- 0.64 MI-4470, 4471 Jun, 2001 K-40 1,514.50+/- 116.60 1,456.80 +/- 130.90 1,485.65 +/- 87.65 SW-4493, 4494 Jun, 2001 Gr. Beta 4.05+/- 1.23 4.64 +/-1.32 4.35 +/- 0.90 BS-4725, 4726 Jun, 2001 Co-60 112.00 +/- 24.30 84.50 +/- 8.70 98.25+/-12.91 BS-4725, 4726 Jun, 2001 Cs-137 3,083.10+/- 100.10 3,094.80 +/- 35.30 3,088.95 +/- 53.07 BS-4725, 4726 Jun, 2001 K-40 8,143.70 +/- 640.40 8,083.80 +/- 225.10 8,113.75 +/- 339.40 MI-4775, 4776 Jun, 2001 K-40 1,362.20 +/- 71.80 1,363.90 +/- 73.40 1,363.05 +/- 51.34 WW-5110, 5111 Jun, 2001 H-3 1,173.50+/- 129.10 1,046.80 +/- 125.20 1,110.15+/-89.92 G-5085, 5086 Jun, 2001 Be-7 0.89+/-0.17 1.14+/- 0.39 1.02 +/- 0.21 G-5085, 5086 Jun, 2001 K-40 5.13 +/- 0.39 5.22 +/- 0.70 5.17+/- 0.40 MI-5259, 5260 Jun, 2001 K-40 1,529.70 +/-122.70 1,406.20+/-123.80 1,467.95 +/- 87.15 MI-5259, 5260 Jun, 2001 Sr-90 1.69 +/- 0.42 1.71 +/- 0.44 1.70 +/- 0.30 SWU-5422, 5423 Jun, 2001 Gr. Beta 2.59 +/- 0.54 1.91 +/- 0.52 2.25 +/- 0.37 VE-5401, 5402 Jun, 2001 Gr. Beta 8.12+/-0.24 8.88 +/- 0.26 8.50+/-+0.18 VE-5401, 5402 Jun, 2001 K-40 6.55 +/- 0.52 6.26 +/- 0.65 6.40 +/- 0.42 AP-5830, 5831 Jun, 2001 Be-7 0.08 +/- 0.01 0.08 +/- 0.01 0.08 +/- 0.01 SW-5557, 5558 Jun, 2001 Gr. Beta 5.43 +/- 1.70 5.96 +/- 1.56 5.70 +/-1.15 AP-5851, 5852 Jun, 2001 Be-7 0.07 +/- 0.02 0.07 +/- 0.02 0.07 +/- 0.01 SW-5636, 5637 Jun, 2001 Gr. Beta 4.75 +/- 1.38 4.18+/- 1.34 4.47 +/- 0.96 LW-5681, 5682 Jun, 2001 Gr. Beta 2.42 +/- 0.37 2.18 +/-0.34 2.30 +/- 0.25 G-5535, 5536 Jul, 2001 Be-7 0.99 +/- 0.29 0.97 +/- 0.54 0.98 +/- 0.31 G-5535, 5536 Jul, 2001 Gr. Beta 7.62 +/- 0.12 7.72 +/-0.12 7.67 +/- 0.08 G-5535, 5536 Jul, 2001 K-40 7.26 +/- 1.03 7.64 +/- 0.93 7.45 +/- 0.69 AP-5788, 5789 Jul, 2001 Be-7 0.08 +/- 0.02 0.07 +/- 0.02 0.08 +/- 0.01 A5-3

Table A-5. In-house "duplicate" samples.

Concentration in pCGi/La Lab Sample First Second Averaged Codes 0 V Analysis R-esult Result Result AP-5872, 5873 Jul, 2001 Be-7 0.07 +/- 0.02 0.08 +/- 0.02 0.07 +/- 0.01 AP-5893, 5894 Jul, 2001 Be-7 0.08 +/- 0.02 0.08 +/- 0.01 0.08 +/- 0.01 AP-5809, 5810 Jul, 2001 Be-7 0.07 +/- 0.02 0.06 +/- 0.01 0.06 +/- 0.01 SW-5724, 5725 Jul, 2001 Gr. Alpha 2.95+/- 0.70 2.89 +/- 0.60 2.92 +/- 0.46 SW-5724, 5725 Jul, 2001 Gr. Beta 8.79 +/- 0.71 8.21 +/- 0.65 8.50 +/- 0.48 SW-5767, 5768 Jul, 2001 1-131 0.79 +/- 0.31 0.61 +/- 0.26 0.70 +/- 0.20 LW-5920, 5921 Jul, 2001 Gr. Beta 3.06 +/- 0.64 3.15+/--0.58 3.11 +/-+0.43 SO-6172, 6173 Jul, 2001 Cs-1 37 0.30 +/- 0.05 0.32 +/- 0.04 0.31 +/- 0.03 SO-6172, 6173 Jul, 2001 K-40 18.20+/-1.08 17.55 +/- 0.82 17.88 +/- 0.68 SO-6172, 6173 Jul 2001 Sr-90 0.03 +/- 0.01 0.05 +/- 0.02 0.04 +/- 0.01 MI-6353, 6354 Jul, 2001 K-40 966.35 +/- 82.28 986.31 +/-+91.91 976.33 +/- 61.68 SW-6376, 6377 Jul, 2001 1-131 0.58-+/-0.16 0.81 +/- 0.17 0.70+/--0.12 VE-6424, 6425 Jul, 2001 Gr. Beta 2.52 +/- 0.05 2.49 +/- 0.05 2.51 +/--0.03 VE-6424, 6425 Jul, 2001 K-40 3.04 +/- 0.26 3.12 +/- 0.37 3.08 +/- 0.23 MI-6445, 6446 Jul, 2001 K-40 1,407.40 +/- 97.10 1,442.20 +/- 189.60 1,424.80 +/-106.51 LW-6489, 6490 Jul, 2001 Gr. Beta 2.61 +/- 0.57 2.79 +/- 0.54 2.70 +/- 0.39 MI-6533, 6534 Jul, 2001 K-40 1,498.60 +/- 113.90 1,375.50 +/- 129.60 1,437.05 +/- 86.27 DW-6835, 6836 Jul, 2001 Gr. Beta 2.01 +/- 0.59 2.36 +/- 0.63 2.19 +/- 0.43 MI-6693, 6694 Aug, 2001 K-40 1,294.30+/- 118.70 1,417.30 +/- 176.50 1,355.80 +/-106.35 MI-6693, 6694 Aug, 2001 Sr-90 1.47 +/- 0.42 1.23 +/- 0.41 1.35+/- 0.29 WW-6952, 6953 Aug, 2001 Gr. Beta 5.49 +/- 0.69 5.80 +/- 0.69 5.64 +/- 0.49 MI-6906, 6907 Aug, 2001 K-40 1,613.80 +/- 218.50 1,532.70 +/- 135.80 1,573.25 +/-128.63 VE-6973, 6974 Aug, 2001 K-40 4.21 +/- 0.24 4.29 +/- 0.64 4.25 +/- 0.34 LW-7851, 7852 Aug, 2001 Gr. Beta 2.20 +/- 0.48 2.12 +/-0.42 2.16 +/-0.32 MI-7001, 7002 Aug, 2001 K-40 1,453.80 +/-148.10 1,285.30 +/- 190.50 1,369.55 +/-120.65 MI-7073, 7074 Aug, 2001 K-40 1,217.30 +/- 80.83 1,218.30 +/- 99.13 1,217.80 +/- 63.95 LW-7145, 7146 Aug, 2001 Gr. Beta 2.77 +/- 0.53 3.60 +/- 0.59 3.19 +/-0.39 MI-7221, 7222 Aug, 2001 K-40 1,192.90+/- 95.40 1,388.90 +/-132.70 1,290.90 +/- 81.72 MI-7221, 7222 Aug, 2001 Sr-90 2.10 +/-0.48 1.72 +/- 0.47 1.91 +/- 0.34 SWU-7527, 7528 Aug, 2001 Gr. Beta 17.51 +/- 3.06 20.36 +/- 3.31 18.93 +/- 2.25 VE-7485, 7486 Aug, 2001 K-40 2.12+/- 0.47 2.47 +/- 0.34 2.30 +/- 0.29 DW-7506, 7507 Aug, 2001 Gr. Beta 4.25+/-1.18 4.13-+/-1.12 4.19+/- 0.81 MI-7622, 7623 Sep, 2001 K-40 1,340.10 +/- 111.10 1,290.80 +/- 116.50 1,315.45 +/- 80.49 MI-7664, 7665 Sep, 2001 K-40 1,408.10 +/- 102.70 1,396.90+/-114.30 1,402.50 +/- 76.83 MI-7876, 7877 Sep, 2001 K-40 1,416.40+/-192.30 1,318.00 +/- 155.50 1,367.20 +/- 123.65 G-7960, 7961 Sep, 2001 Be-7 1.27 +/- 0.21 1.25 +/- 0.25 1.26 +/- 0.16 A5-4

Table A-5. In-house "duplicate" samples.

Concentration in pCi/L3 Lab Sample First Second Averaged nn *,

Codes Analysis rsult R~esult Result G-7960, 7961 Sep, 2001 K-40 5.21 +/- 0.57 5.70 +/- 0.63 5.45 +/- 0.43 F-8011, 8012 Sep, 2001 Cs-1 37 0.06 +/- 0.02 0.04 +/- 0.02 0.05 +/- 0.01 F-8011, 8012 Sep, 2001 Gr. Beta 3.68+/-0.12 3.50 +/- 0.11 3.59 +/- 0.08 F-8011, 8012 Sep, 2001 K-40 3.47 +/- 0.49 3.38 +/- 0.47 3.43 +/- 0.34 MI-8149, 8150 Sep, 2001 K-40 1,551.70 +/- 118.00 1,489.90+/-123.60 1,520.80 +/- 85.44 MI-8343, 8344 Sep, 2001 K-40 1,550.30+/-170.60 1,368.10+/-126.70 1,459.20 +/- 106.25 VE-8319, 8320 Sep, 2001 Gr. Beta 3.37 +/- 0.10 3.42 +/- 0.11 3.39 +/- 0.07 VE-8319, 8320 Sep, 2001 K-40 2.14 +/- 0.46 2.24 +/- 0.37 2.19 +/-0.29 AP-9069, 9070 Sep, 2001 Be-7 0.07 +/- 0.02 0.07 +/- 0.01 0.07 +/- 0.01 AP-9566, 9567 Sep, 2001 Be-7 0.08 +/- 0.02 0.09 +/- 0.03 0.09 +/- 0.02 VE-8700, 8701 Oct, 2001 Be-7 0.24+/-+0.10 0.19+/-0.10 0.22 +/- 0.07 VE-8700, 8701 Oct, 2001 K-40 2.03 +/- 0.24 2.03 +/- 0.21 2.03 +/- 0.16 VE-8700, 8701 Oct, 2001 Sr-90 0.01 +/- 0.00 0.01 +/- 0.00 0.01 +/- 0.00 AP-9048, 9049 Oct, 2001 Be-7 0.07 +/- 0.01 0.07 +/- 0.00 0.07 +/- 0.01 DW-8636, 8637 Oct, 2001 Gr. Beta 4.74 +/- 1.06 5.08 +/- 1.21 4.91 +/- 0.80 DW-8615, 8616 Oct, 2001 Gr. Beta 4.65 +/- 0.58 4.28 +/- 0.54 4.47 +/- 0.40 AP-9090, 9091 Oct, 2001 Be-7 0.07 +/- 0.01 0.07 +/- 0.01 0.07 +/- 0.01 AP-9166, 9167 Oct, 2001 Be-7 0.08 +/- 0.02 0.08 +/- 0.02 0.08 +/- 0.01 AP-9187, 9188 Oct, 2001 Be-7 0.07 +/- 0.01 0.05+/- 0.01 0.06 +/- 0.01 VE-10562, 10563 Oct, 2001 Be-7 309.90+/-158.80 348.30+/- 168.10 329.10+/-115.62 VE-10562, 10563 Oct, 2001 K-40 6,407.10 +/- 620.70 6,057.50 +/- 660.40 6,232.30 +/- 453.15 WW-8636, 8637 Oct, 2001 Gr. Beta 5.08 +/- 1.20 4.74+/-1.06 4.91 +/-0.80 DW-8894, 8895 Oct, 2001 Gr. Beta 4.28 +/- 0.89 3.40 +/- 0.90 3.84 +/- 0.63 MI-9232, 9233 Oct, 2001 K-40 1,440.70 +/- 46.60 1,424.80 +/- 76.40 1,432.75 +/- 44.75 VE-9518, 9519 Oct, 2001 K-40 1.91 +/- 0.22 1.97 +/- 0.39 1.94 +/- 0.22 WW-10257, 10258 Nov, 2001 H-3 755.90+/- 102.50 684.70 +/- 99.90 720.30 +/- 71.57 VE-10333, 10334 Nov, 2001 Be-7 0.68 +/- 0.26 0.99 +/- 0.26 0.84+/- 0.18 VE-10333, 10334 Nov, 2001 K-40 6.10+/-0.72 5.83 +/- 0.72 5.97 +/- 0.51 MI-10588, 10589 Nov, 2001 K-40 1,428.40 +/- 114.70 1,445.50+/-129.40 1,436.95 +/- 86.46 DW-10688, 10689 Nov, 2001 Gr. Beta 3.49 +/- 0.91 2.36+/-0.76 2.93 +/- 0.60 WW-10905, 10906 Dec, 2001 H-3 233.90 +/- 90.60 226.30 +/- 90.20 230.10 +/- 63.92 SS-10953, 10954 Dec, 2001 Ac-228 1.10+/-0.25 0.91 +/- 0.16 1.00 +/-0.15 SS-10953, 10954 Dec, 2001 Bi-214 0.69 +/- 0.08 0.75 +/- 0.08 0.72 +/- 0.06 SS-1 0953, 10954 Dec, 2001 Co-58 0.21 +/- 0.05 0.18+/- 0.04 0.19+/- 0.03 SS-10953, 10954 Dec, 2001 Co-60 0.93 +/- 0.06 0.94 +/- 0.06 0.93 +/- 0.04 SS-10953, 10954 Dec, 2001 Cs-137 0.13+/- 0.03 0.16 +/-0.03 0.14 +/-0.02 A5-5

Table A-5. In-house "duplicate" samples.

Concentration in pCi/La Lab Sample First Second Averaged Codes Date Analysis Result Result Result 10U94 3-IUUi, Dec, 2001 K-40 9.91 +/-_0.83 8.36_+/-0.80 9.13_+/-0.57 SS-10953, 10954 Dec, 2001 Pb-212 0.94_+/-0.05 0.91 +/-_0.06 0.92_+/-0.04 SS-10953, 10954 Dec, 2001 Pb-214 0.83_+/-0.08 0.82+/-0.07 0.83_+/-0.05 SS-10953, 10954 Dec, 2001 Ra-226 1.76+/- 0.37 1.67 +/- 0.37 1.72+/- 0.26 SS-10953, 10954 Dec, 2001 TI-208 0.34 +/-0.05 0.31 +/--0.05 0.32 +/-0.04 MI-11033, 11034 Dec, 2001 K-40 1,339.80+/- 128.70 1,435.80+/- 117.30 1,387.80+/-87.07 MI-11033, 11034 Dec, 2001 Sr-90 1.31 +/-0.41 1.38-+/-0.37 1.35+/--0.28 AP-11888, 11889 Dec, 2001 Be-7 0.06-+/-0.02 0.06+/-_0.02 0.06_+/-0.01 Duplicate analyses are performed on every twentieth sample received in-house. Results are not listed for those analyses with activities that measure below the LLD.

a Results are reported in units of pCi/L, except for elemental potassium (K) in milk (mg/L), air filters (pCi/Filter), food products and vegetation (pCi/g), soil and sediments (pCi/kg).

A5-6

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

Concentrationb Lab Sample Date MAPEP Resultd Control Code Type Collected Analysis Laboratory resultc 1s, N=1 Limits STSO-923 SOIL Jan, 2001 Am-241 0.0 - 2.6 Included in the testing series as a "false positive". No activity expected. Result of analysis; < 0.8 Bq/L.

STSO-923 SOIL Jan, 2001 Co-57 100.2 +/- 3.5 103.0+/- 10.3 72.1 -133.9 STSO-923 SOIL Jan, 2001 Co-60 1,285.1 +/- 5.3 1,270.0+/- 127.0 889.0 - 1,651.0 STSO-923 SOIL Jan, 2001 Cs-134 81.1 +/-1.8 91.1+/- 9.1 63.8- 118.4 STSO-923 SOIL Jan, 2001 Cs-1 37 1,210.6+/- 6.6 1,240.0+/- 124.0 868.0- 1,612.0 STSO-923 SOIL Jan, 2001 K-40 732.6+/- 21.2 652.0+/- 65.2 456.4 - 847.6 STSO-923 SOIL Jan, 2001 Mn-54 212.6+/-6.7 203.0+/- 20.3 142.1 - 263.9 STSO-923 SOIL Jan, 2001 Pu-238 110.7+/- 7.2 115.0+/- 11.5 80.5-149.5 STSO-923 SOIL Jan, 2001 Pu-239/40 79.6 +/- 5.9 83.4+/- 8.3 58.4- 108.4 STSO-923 SOIL Jan, 2001 Sr-90 159.8 +/- 9.5 209.0+/- 20.9 146.3- 271.7 STSO-923 SOIL Jan, 2001 U-233/4 45.0 +/- 3.9 60.0+/- 6.0 42.0- 78.0 STSO-923 SOIL Jan, 2001 U-238 165.6 +/- 7.4 191.0+/- 19.1 133.7 - 248.3 STSO-923 SOIL Jan, 2001 Zn-65 428.5 +/- 10.9 382.0+/- 38.2 267.4 - 496.6 a Results obtained by Environmental, Inc., Midwest Laboratory as a participant in the Department of Energy's Mixed Analyte Performance Evaluation Program, Idaho Operations office, Idaho Falls, Idaho.

b All results are in Bq/kg or Bq/L as requested by the Department of Energy.

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

A6-1

Table A-7. Environmental Measurements Laboratory Quality Assessment Program (EML)a.

ConcentrationI Lab Sample Date Control Code Type Collected Analysis Laboratory result EML Resultc Limits" STSO-904 SOIL Mar, 2001 Ac-228 45.60 +/- 4.0 42.70 0.80- 1.50 STSO-904 SOIL Mar, 2001 Am-241 14.40 +/- 0.5 14.80 0.63 - 2.64 STSO-904 SOIL Mar, 2001 Bi-212 53.20+/- 3.1 42.00 0.45- 1.23 Naturally-occurring radium and thorium daughters are present in the shield background, and a probable cause of the higher bias seen for isotopes of lead and bismuth.

STSO-904 SOIL Mar, 2001 Bi-214 42.10+/- 7.7 32.60 0.78- 1.50 STSO-904 SOIL Mar, 2001 Cs-1 37 1,772.60 +/- 79.8 1,740.00 0.80 - 1.29 STSO-904 SOIL Mar, 2001 K-40 583.80 +/- 52.6 468.00 0.80 - 1.37 STSO-904 SOIL Mar, 2001 Pb-212 46.60 +/- 8.5 41.50 0.74- 1.36 STSO-904 SOIL Mar, 2001 Pb-214 45.30 +/- 8.6 34.30 0.76-1.53 STSO-904 SOIL Mar, 2001 Pu-239/40 26.00 +/- 0.8 25.60 0.71 - 1.33 STSO-904 SOIL Mar, 2001 Sr-90 55.60 +/- 2.2 69.00 0.61 - 3.91 STW-905 WATER Mar, 2001 Am-241 2.15+/- 0.1 1.67 0.76 - 1.48 STW-905 WATER Mar, 2001 Co-60 97.00 +/- 0.8 98.20 0.80-1.20 STW-905 WATER Mar, 2001 Cs-1 37 70.10+/-4.0 73.00 0.80- 1.20 STW-905 WATER Mar, 2001 H-3 76.50 +/- 5.5 79.30 0.74 - 2.29 STW-905 WATER Mar, 2001 Pu-238 1.69 +/- 0.1 1.58 0.74- 1.22 STW-905 WATER Mar, 2001 Pu-239140 1.69+/- 0.1 1.64 0.75- 1.26 STW-905 WATER Mar, 2001 Sr-90 3.85+/-0.1 4.40 0.64-1.50 STW-905 WATER Mar, 2001 U-233/4 0.90 +/- 0.1 1.04 0.80- 1.40 STW-905 WATER Mar, 2001 U-238 0.88 +/- 0.1 1.04 0.80- 1.29 STW-906 WATER Mar, 2001 Gr. Alpha 1,724.60 +/- 141.7 1,900.00 0.58 - 1.26 STW-906 WATER Mar, 2001 Gr. Beta 1,246.40 +/- 31.1 1,297.00 0.56- 1.50 STAP-907 AIR FILTER Mar, 2001 Am-241 0.47 +/- 0.0 0.49 0.69 - 2.40 STAP-907 AIR FILTER Mar, 2001 Co-60 20.11 +/-0.2 19.44 0.79- 1.30 STAP-907 AIR FILTER Mar, 2001 Cs-134 2.71 +/-0.2 2.83 0.74- 1.21 STAP-907 AIR FILTER Mar, 2001 Cs-1 37 9.86 +/- 0.2 8.76 0.78- 1.35 STAP-907 AIR FILTER Mar, 2001 Mn-54 7.25 +/- 0.2 6.52 0.80- 1.36 STAP-907 AIR FILTER Mar, 2001 Pu-238 0.23 +/- 0.0 0.22 0.66-1.35 STAP-907 AIR FILTER Mar, 2001 Pu-239/40 0.12+/- 0.0 0.14 0.69-1.29 A7-1

Table A-7. Environmental Measurements Laboratory Quality Assessment Program (EML)a.

Concentration b Sample Lab Sample Date Control Code Type Collected Analysis Laboratory result EML Resultc Limits" STAP-907 AIR FILTER Mar, 2001 Sr-90 7.41 +/-0.2 7.10 0.55 - 2.05 STAP-907 AIR FILTER Mar, 2001 U-233/4 0.05 +/- 0.0 0.05 0.80- 1.92 STAP-907 AIR FILTER Mar, 2001 U-238 0.05 +/- 0.0 0.05 0.80-1.59 STAP-908 AIR FILTER Mar, 2001 Gr. Alpha 2.66 +/- 0.0 3.97 0.57-1.47 STAP-908 AIR FILTER Mar, 2001 Gr. Beta 2.30 +/- 0.0 2.58 0.76-1.52 STVE-909 VEGETATION Mar, 2001 Am-241 6.10+/-+0.2 6.17 0.72-2.34 STVE-909 VEGETATION Mar, 2001 Cm-244 3.50 +/- 0.5 3.69 0.61-1.61 STVE-909 VEGETATION Mar, 2001 Co-60 28.50+/- 2.1 30.40 0.75- 1.51 STVE-909 VEGETATION Mar, 2001 Cs-1 37 795.50 +/- 76.4 842.00 0.80- 1.37 STVE-909 VEGETATION Mar, 2001 K-40 592.60 +/- 42.5 603.00 0.78- 1.43 STVE-909 VEGETATION Mar, 2001 Pu-239/40 8.50 +/- 0.6 9.58 0.67- 1.49 STVE-909 VEGETATION Mar, 2001 Sr-90 1,239.60 +/-130.0 1,330.00 0.52- 1.23 STW-925 WATER Sep, 2001 Am-241 0.70 +/- 0.1 0.76 0.76-1.48 STW-925 WATER Sep, 2001 Co-60 206.70 +/- 4.7 209.00 0.80 - 1.20 STW-925 WATER Sep, 2001 Cs-1 37 46.60 +/- 0.8 45.13 0.80- 1.24 STW-925 WATER Sep, 2001 H-3 254.10 +/- 3.6 207.00 0.74 - 2.29 STW-925 WATER Sep, 2001 Ni-63 50.90 +/- 3.0 45.25 0.70- 1.30 STW-925 WATER Sep, 2001 Pu-238 1.10+/-0.1 1.09 0.74-1.22 STW-925 WATER Sep, 2001 Pu-239/40 1.60+/-0.1 1.63 0.75-1.26 STW-925 WATER Sep, 2001 Sr-90 4.10+/-0.3 3.73 0.64- 1.50 STW-925 WATER Sep, 2001 Uranium 2.20 +/- 0.2 2.37 0.73- 1.37 STW-926 WATER Sep, 2001 Gr. Alpha 1,220.00 +/- 32.0 1,150.00 0.58-1.26 STW-926 WATER Sep, 2001 Gr. Beta 8,461.00 +/- 206.0 7,970.00 0.56-1.50 STSO-927 SOIL Sep, 2001 Ac-228 68.10 +/-1.4 59.57 0.80- 1.50 STSO-927 SOIL Sep, 2001 Am-241 5.20 +/- 1.3 4.43 0.63 - 2.64 STSO-927 SOIL Sep, 2001 Bi-212 65.10+/-1.6 62.07 0.45- 1.23 STSO-927 SOIL Sep, 2001 Bi-214 47.30 +/- 4.7 36.90 0.78- 1.50 STSO-927 SOIL Sep, 2001 Cs-137 659.20+/- 10.8 612.33 0.80- 1.29 STSO-927 SOIL Sep, 2001 K-40 737.70+/-16.6 623.33 0.80 - 1.37 A7-2

Table A-7. Environmental Measurements Laboratory Quality Assessment Program (EML)a.

Concentration Lab Sample Date Control Code Type Collected Analysis Laboratory result EML Result' Limitsd STSO-927 SOIL Sep, 2001 Pb-212 64.70 +/- 3.8 58.33 0.74- 1.36 STSO-927 SOIL Sep, 2001 Pb-214 53.70 +/- 7.7 39.67 0.76- 1.53 STSO-927 SOIL Sep, 2001 Pu-239/40 9.30 +/- 2.9 8.95 0.71 - 1.33 STSO-927 SOIL Sep, 2001 Sr-90 27.40 +/- 6.3 30.60 0.61 - 3.91 STSO-927 SOIL Sep, 2001 Uranium 155.60 +/- 7.8 194.23 0.62- 1.35 STVE-928 VEGETATION Sep, 2001 Am-241 7.00 +/- 0.3 6.92 0.72 - 2.34 STVE-928 VEGETATION Sep, 2001 Cm-244 4.30 +/- 0.8 4.31 0.61 - 1.61 STVE-928 VEGETATION Sep, 2001 Co-60 40.20 +/- 0.9 35.30 0.75- 1.51 STVE-928 VEGETATION Sep, 2001 Cs-1 37 1,184.00 +/- 2.8 1,030.00 0.80- 1.37 STVE-928 VEGETATION Sep, 2001 K-40 1,023.00 +/- 44.1 898.67 0.78- 1.43 STVE-928 VEGETATION Sep, 2001 Pu-239/40 8.90+/- 1.4 11.02 0.67- 1.49 STVE-928 VEGETATION Sep, 2001 Sr-90 1,364.00 +/- 18.4 1,612.80 0.52- 1.23 STAP-929 AIR FILTER Sep, 2001 Am-241 0.09 +/- 30.0 0.09 0.69 - 2.40 STAP-929 AIR FILTER Sep, 2001 Co-60 16.90 +/- 0.3 17.50 0.79- 1.30 STAP-929 AIR FILTER Sep, 2001 Cs-134 11.80 +/- 0.2 12.95 0.74- 1.21 STAP-929 AIR FILTER Sep, 2001 Cs-137 18.30 +/-0.3 17.10 0.78- 1.35 STAP-929 AIR FILTER Sep, 2001 Mn-54 85.40 +/- 1.3 81.15 0.80- 1.36 STAP-929 AIR FILTER Sep, 2001 Pu-238 0.05 +/- 0.0 0.07 0.66- 1.35 STAP-929 AIR FILTER Sep, 2001 Pu-239/40 0.22 +/- 0.0 0.23 0.69- 1.29 STAP-929 AIR FILTER Sep, 2001 Sr-90 3.11 +/-0.1 3.48 0.55 - 2.05 STAP-929 AIR FILTER Sep, 2001 Uranium 0.24+/-0.1 0.22 0.80 - 2.54 STAP-930 AIR FILTER Sep, 2001 Gr. Alpha 6.30 +/- 0.1 5.36 0.57- 1.47 STAP-930 AIR FILTER Sep, 2001 Gr. Beta 13.80+/-0.1 12.77 0.76- 1.52 a The Environmental Measurements Laboratory provides the following nuclear species : Air Filters, Soil, Vegetation and Water.

b Results are reported in Bq/L with the following exceptions:

Air Filter results are reported in Bq/Filter, Soil results are reported in Bq/Kg, Vegetation results are reported in Bq/Kg.

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

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

A7-3

APPENDIX B DATA REPORTING CONVENTIONS B-1

Data Reporting Conventions 1.0. All activities, except gross alpha and gross beta, are decay corrected to collection time or the end of the collection period.

2.0. Single Measurements Each single measurement is reported as follows: x+/- s where: x = value of the measurement; s = 2s counting uncertainty (corresponding to the 95% confidence level).

In cases where the activity is less than the lower limit of detection L, it is reported as: <L, where L = the lower limit of detection based on 4.66s uncertainty for a background sample.

3.0. Duplicate analyses 3.1 Individual results: For two analysis results; x, +/- s, and x 2 +/- S2 Reported result: x +/- s; where x = (1/2) (xi + x 2) and s = (1/2) st +s2 3.2. Individual results: <LI, <L2 Reported result: <L, where L = lower of L, and L 2 3.3. Individual results: x +/- s, <L Reported result: x +/- s if x >_!L; <L otherwise.

4.0. Computation of Averages and Standard Deviations 4.1 Averages and standard deviations listed in the tables are computed from all of the individual measurements over the period averaged; for example, an annual standard deviation would not be the average of quarterly standard deviations. The average x and standard deviation s of a set of n numbers x,, x2 ... xn are defined as follows:

S-1X 2 n n-i 4.2 Values below the highest lower limit of detection are not included in the average.

4.3 If all values in the averaging group are less than the highest LLD, the highest LLD is reported.

4.4 If all but one of the values are less than the highest LLD, the single value x and associated two sigma error is reported.

4.5 In rounding off, the following rules are followed:

4.5.1. If the figure following those to be retained is less than 5, the figure is dropped, and the retained figures are kept unchanged. As an example, 11.443 is rounded off to 11.44.

4.5.2. If the figure following those to be retained is equal to or greater than 5, the figure is dropped and the last retained figure is raised by 1. As an example, 11.445 is rounded off to 11.45.

4.6 Composite samples which overlap the next month or year are reported for the month or year in which most of the sample is collected.

B-2

APPENDIX C TECHNICAL SPECIFICATION 2.1.3 REACTOR COOLANT DOSE EQUIVALENT IODINE ABOVE TECHNICAL SPECIFICATION LIMIT C-1

The following information is provided per Technical Specification 2.1.3(4).

On 3/16/2001 RCS Dose Equivalent Iodine (DEI) exceeded the Technical Specification Limit of 1.0 ýiCi/gm for approximately 23 hours2.662037e-4 days <br />0.00639 hours <br />3.80291e-5 weeks <br />8.7515e-6 months <br />.

On 3/17/2001 the limit was exceeded again for 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />.

Sum of ACTIVITY NUCLIDE DAY REACTOR POWER LETDOWN FLOW DEI 1-131 1-133 3/14/2001 7:33 30 73.7 3.61E-02 1.77E-02 3.80E-02 3/15/2001 20:43 11 69.2 4.11E-01 3.35E-01 2.07E-01 3/16/2001 0:55 0 72.8 1.77E+00 1.49E+00 8.30E-01 3/16/2001 6:55 0 75.6 2.91E+00 2.52E+00 1.24E+00 3/16/2001 11:23 0 73.4 2.34E+00 2.06E+00 8.96E-01 3/16/2001 12:53 0 70 1.79E+00 1.59E+00 6.68E-01 3/16/2001 15:35 0 65 1.59E+00 1.42E+00 5.39E-01 3/16/2001 19:00 0 78 1.07E+00 9.69E-01 3.26E-01 3/17/2001 1:00 0 16.7 7.15E-01 6.60E-01 1.83E-01 3/17/2001 4:43 0 74 9.86E-01 9.12E-01 2.42E-01 3/17/2001 6:46 0 75.4 8.15E-01 7.59E-01 1.87E-01 3/17/2001 10:27 0 74 1.06E+00 9.95E-01 2.24E-01 3/17/2001 12:33 0 74 9.40E-01 8.85E-01 1.87E-01 3/17/2001 14:29 0 74 8.08E-01 7.62E-01 1.57E-01 C-2

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