E910-05-035, Final Status Survey Report for Saxton Nuclear Experimental Corporation Open Land Area OL7

Final Status Survey Report for Saxton Nuclear Experimental Corporation Open Land Area OL7

ML052090269
Person / Time
Site:	Saxton File:GPU Nuclear icon.png
Issue date:	07/22/2005
From:	Kuehn G GPU Nuclear Corp
To:	Document Control Desk, Office of Nuclear Reactor Regulation
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E910-05-035
Download: ML052090269 (59)

Text

GPU Nuclear, Inc.

7mU Three Mile Island Nuclear Station NUCLEAR Route 441 South Post Office Box 480 July 22, 2005 Middletown, PA 17057-0480 E910-05-035 Tel 717-948-8461 U.S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, DC 20555 Gentlemen, Subject Saxton Nuclear Experimental Corporation (SNEC)

Operating License No., DPR-4 Docket No. 50-146 FSS Report for OL7 Soils The purpose of this letter is to submit for your review the attached FSS Report for OL7 Soils. One CD-ROM is included in this submission. The CD-ROM labeled: 'FSS Report - OL7 Soils - Publicly Available' contains the following 4 files:

Document Title File Name File Size (Mbytes)

Main Report 001 FSS Report-OL7.pdf 0.213 Appendix A (pages 1-9) 002 - Appendix A (1-9).pdf 45.3 Appendix A (attachments 1-1 to 9-1) 003 - Appendix A (attachments 1- 46.3 Appendix toAppendixD004_- Appendito 9-1).pdf toAppendix15.38 Appendix B to Appendix D 004 -Appendix B to Appendix 15.38

_________________________________In nfif_____________

If you have any questions on this information, please contact Mr. Art Paynter at (814) 635-4384.

Sincerely, SG .K hn Program Director, SNEC cc: NRC Project Manager NRC Project Scientist, Region I Mr. Tim Bauer, ORISE Project Leader

-AID0 4-Ao

Final Status Survey Report For Saxton Nuclear Experimental Corporation Open Land Area 0L7 Prepared by GPU Nuclear, Inc.

July, 2005

Table Of Contents Executive Summary

1.0 Purpose and Scope

2.0 Survey Area Description 3.0 Operating History 3.1 Plant Operations 3.2 Survey Area Remediation Status 4.0 Site Release Criteria 5.0 Final Status Survey Design I DQO Process 6.0 Final Status Survey Results 6.1 Summary for Survey Unit OL7-1 6.2 Summary for Survey Unit 0L7-2 6.3 Summary for Survey Unit OL7-3 7.0 Data Assessment 7.1 Assessment Criteria 7.2 Summary of Overall Results 7.3 Survey Variations 7.4 Quality Control Measurements 8.0 Final Status Survey Conclusions 9.0 References 10.0 Appendices i

Executive Summary This report presents the results and conclusions of the final status survey (FSS) of the Class 2 open land areas around the south and south central portion of the Saxton Nuclear Experimental Corporation (SNEC) facility designated as 0L7.

This FSS survey was conducted in May and June of 2005.

The FSS was performed in accordance with the SNEC License Termination Plan (LTP). The survey area (0L7) was divided into three survey units. Two of the three survey units had asphalt paving and/or concrete structures. Asphalt and concrete will be covered in a separate OL7 FSS Report. Each of the survey units in this report consisted of relatively flat open land.

Data were collected from each survey unit in accordance with the specific survey design data collection requirements. The following is a summary of the soil measurements:

1) Direct Nal(TI) scans of all or parts of 81 100-square meter grids covering about 49% of the actual land area

2) 33 soil samples collected and then analyzed by laboratory gamma spectroscopy The FSS survey data demonstrate that 13,958 square meters of open land in the 0L7 survey area meets the radiological release criteria for unrestricted use specified in 10CFR20.1402. Therefore, GPU Nuclear, Inc. concludes that the open land portion of the survey area meets the NRC requirements and may be released for unrestricted use.

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1.0 Purpose and Scope

This report presents the results and conclusions of the final status survey of the open land area designated OL7 of the SNEC facility. It provides the information required by 10CFR50.82(a)(11) and the SNEC license termination plan (LTP) to demonstrate that this area meets the radiological criteria for unrestricted use specified in 10CFR20.1402.

This report describes the radiological data collected in three Class 2 survey units of open land surface. This report only addresses the FSS performed on the specific area designated as OL7 on reference 9.1. The format of this report follows the guidance contained in reference 9.2.

2.0 Survey Area Description Survey Area OL7 is a Class 2 impacted area encompassing the south and south-central portions of the SNEC Site. The survey area contains about 17,900 square meters of horizontal surface area: divided into open land and paved surfaces and concrete. Because the area exceeds the size guidance in the SNEC LTP for Class 2 survey areas (10,000 square meters recommended maximum), the survey area was divided into three smaller survey units. Layout of the survey area and individual units, relative to the site layout, are shown in -1 of Appendix A. The three survey units are discussed below. The OL7 designation is taken from the drawing, reference 9.1.

Survey Unit 0L7-1 is located in the south-central portion of the site with OL3 to the north and both 0L8-3 and 0L8-4 to the south. The survey unit is approximately 6,200 square meters of which 3,761 square meters is soil, 1,556 square meters is asphalt, and 882 square meters is concrete.

Survey Unit 0L7-2 extends from the south-central to the southern portion of the site almost completely bisecting 0L8-3. The survey unit is approximately 4,200 square meters of which 2,696 square meters is soil and 1,503 square meters is asphalt. There are no concrete structures in this survey unit.

Survey Unit OL7-3 extends from the south to the south-central portion of the site with 0L8-4 to the west and 0L8-5 to the east. The survey unit is approximately 7,500 square meters. There is neither asphalt nor concrete structures in this survey unit.

3.0 Operating History 3.1 Plant Operation 2 of 13

The Saxton Nuclear Experimental Corporation (SNEC) facility included a pressurized water reactor (PWR), which was licensed to operate at 23.5 megawatts thermal (23.5 MWTh). The facility is owned by the Saxton Nuclear Experimental Corporation and is licensed by GPU Nuclear, Inc. The SNEC facility is maintained under a Title 10 Part 50 license and associated Technical Specifications. In 1972, the license was amended to possess but not operate the SNEC reactor.

The facility was built from 1960 to 1962 and operated from 1962 to 1972 primarily as a research and training reactor. After shutdown in 1972, the facility was placed in a condition equivalent to the current SAFSTOR status. Since then, it has been maintained in a monitored condition. The fuel was removed in 1972 and shipped to a (now DOE) facility at Savannah River, SC, who is now the owner of the fuel. As a result of this action, neither SNEC nor GPU Nuclear, Inc.

has any further responsibility for the spent fuel from the SNEC facility. The building and structures that supported reactor operation were partially decontaminated by 1974.

In the late 1980s and through the 1990s, additional decontamination and disassembly of the containment vessel and support buildings and final equipment and large component removal was completed. Final decontamination and dismantlement of the reactor support structures and buildings was completed in 1992. Large component structures, pressurizer, steam generator, and reactor vessel were removed in late 1998. Containment vessel removal (to below grade) and backfill was completed in late 2003. Decontamination, disassembly, and demolition of the SNEC facility buildings and equipment have been completed and the facility is in the process of Final Status Survey for unrestricted release and license termination.

3.2 Survey Area Remediation Status There has been no remediation performed in any of the three units in 0L7.

4.0 Site Release Criteria The site release criteria applied to the open land areas in OL7 correspond to the radiological dose criteria for unrestricted use per 10CFR20.1402. The dose criteria is met uif the residual radioactivity that is distinguishable from background radiation results in a Total Effective Dose Equivalent (TEDE) to an average member of the critical group that does not exceed 25 mremlyr, including that from groundwater sources of drinking water, and that the residual radioactivity has been reduced to levels that are as low as reasonably achievable (ALARA)".

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Levels of residual radioactivity that correspond to the allowable dose to meet the site or survey unit release criteria were derived by analyses using a resident farmer family scenario. The dose modeling for this scenario is explained in the SNEC LTP (reference 9.3). The derived concentration guideline levels (DCGL) shown in Table 5-1 of the SNEC LTP form the basis for satisfying the site release criteria.

Residual radioactivity sample results for the soils were used to calculate a surrogate Cs-137 DCGL. The adjusted surrogate DCGL was developed using the methodology described in the SNEC LTP section 5.2.3.2.3 based on nuclide specific DCGLs from Table 5-1 of the LTP.

An adjustment was made to the surrogate Cs-1 37 DCGL to address the de-listed radionuclides as described in the LTP section 6.2.2.3. SNEC has instituted an Administrative Limit of 75% of the DCGL for all measurement results. The de-listed radionuclides are conservatively accounted for in this 25% reduction since the de-listed radionuclides were only 4.7% of the dose contribution. These adjustment factors are discussed in section 6 of the SNEC LTP.

5.0 Final Status Survey Design I DQO Process The SNEC calculation providing the design of the survey for these survey units is provided in Appendix A. Since the survey units were all Class 2, scan measurements were conducted over 10% to 100% of the surface of each survey unit. Scans were conducted using an Nal detector with a narrow window optimized for Cs-137 to reduce background.

The number of soil sample points was determined by using the COMPASS computer program (reference 9.6, attachment 7 of appendix A). These points were located on survey maps using the Visual Sample Plan program (reference 9.7, attachment 6 of appendix A). Samples are collected to a depth of 1 meter to match the site surface dose model used in the SNEC LTP (reference 9.3).

The survey design uses a surrogate Cs-137 effective DCGL developed from a radionuclide mix analysis, from soil samples collected before the Final Status Survey, in the vicinity of the survey unit. The radionuclide mix (including the hard-to-detects listed in Table 5-1 of the LTP) for all three survey units, OL7-1 through OL7-3, was based on the CV Yard Soil data (attachment 2 of appendix A). CV Yard Soil data were chosen because they were generally greater than MDA, whereas most of the OL7 data were near to or less than the MDA which led to an unrealistic DCGL.

Cs-137, Co-60, H-3, and Sr-90 were positively detected in one or more of these samples and are accounted for in the adjusted surrogate DCGL. The following 4 of 13

table (Table 1) presents the Data Quality Objectives (DQO) and other relevant information from the survey design package.

Table I - DQO/Design DQO/Design OL7-1 OL7-2 OL7-3 Parameter SNEC Design Calc. E900 E900 E900 S CDegnac.# 022 022 022 MARSSIM Classification 2 2 2 6,200 total 4,200 total 7,500 total Survey Unit Area (m2) 3,761 soil 2,697 soil

• 7,500 soil Statistical Test Sign Sign Sign Type 1 decision error (a) 0.05 0.05 0.05 Type 2 decision error (P) 0.1 0.1 0.1 LBGR (pCi/gm) 3.6 3.3 3.5 Estimated a (pCi/gm) 0.27 0.35 0.28 Relative Shift (A/a) 2.64 2.83 2.87 Number of static points 11 11 11 DCGLw (Cs-137 5.73 5.73 5.73 PCi/gm)

Action Level (Cs-137 4.30 4.30 4.30 pCi/gm)

Scan MDC (pCi/gm) 5.67 5.67 5.67 SNEC Survey Request # SR221 SR222 SR223 Scan Survey Instrument L2350-1 w/ L2350-1 w/ L2350-1 wI Scan urveInstumen 44-10 44-10 44-10

• The remaining non-soil surface areas are described in 0L7 Paved Surfaces and Concrete FSS Report 6.0 Final Status Survey Results The following sections provide the survey summary results for each survey unit as required by the respective design. Summary data was taken from references 9.10, 9.11, and 9.12 which are filed in the SNEC history files.

6.1 Summary for Survey Unit OL7-1 6.1.1 Scan survey Scan measurements were made in 25 grids using a 2 inch by 2 inch Nal detector with an MDCscan of 5.67 pCi/gm (Table 2 on page 3 of appendix A). The 5 of 13

Administrative Limit was 4.30 pCi/gm (Table 1 on page 2 of appendix A) and the adjusted surrogate Cs-I 37 DCGLw for this survey unit was 5.73 pCi/gm (Table 1 on page 2 of appendix A). Since this is a Class 2 impacted survey unit, the EMC does not apply.

Of the 25 grids scanned, two grids had inaccessible regions due to scrub bushes, a tree, and an iron storm drain (see section 7.3.1 for yard drain explanation). Of the 25 grids, a total of about 4.9 square meters was not scanned due to interferences, resulting in approximately 2,082.25 square meters actually scanned in the 3,761 square meter survey unit. This is slightly greater than 55 percent of the soil surface area in this unit.

The scans conducted in all 25 grids did not identify any activity in the soils greater than the MDCscan. The Administrative Limit was >160 ncpm. No area greater than 160 ncpm was found in 0L7-1.

6.1.2 Soil samples A total of II random start, triangular grid, systematic soil sample locations were defined for the survey unit based on a conservative relative shift of about 2.64.

Using the typical LBGR of 50% of the DCGL, only 11 samples were required, which includes a 20% adjustment. Given the variability used for the survey design (0.27 pCi/gm) and the Administrative Limit of 4.30 pCi/gm, the LBGR used was conservative. No biased samples were required.

None of the design fixed point soil samples in OL7-1 showed activity in excess of the Administrative Limit. Table 2 below shows the Cs-137 results (no other licensed isotopes were detected) for each sample along with the mean, standard deviation, and range of the soil sample data. Results that are less than MDA are assumed to be positive at the MDA value for the statistics in the table thereby overestimating the mean.

The standard deviation of the samples collected from the survey unit was less than the variability assumed in the survey design, therefore the assessment of variability, relative shift, and number of samples required is consistent between the survey design and the survey results. Based on this assessment, neither changes to the survey design nor additional sampling is required.

Table 2 - Soil sample results for 0L7-1 Sample Cs-1 37 Number pCi/gm 1 0.09 2 <0.06 3 0.15 4 <0.18 6 of 13

5 0.19 6 0.09 7 <0.05 8 <0.10 9 1<0.12 10 0.12 11 <0.13 Mean 0.12 Std Dev 0.04 Min <0.05 Max 0.19 6.2 Summary for Survey Unit 0L7-2 6.2.1 Scan survey Scan measurements were made in 20 grids using a 2 inch by 2 inch Nal detector with an MDCscan of 5.67 pCi/gm (Table 2 on page 3 of appendix A). The Administrative Limit was 4.30 pCi/gm (Table 1 on page 2 of appendix A) and the adjusted surrogate Cs-137 DCGLw for this survey unit was 5.73 pCi/gm (Table 1 on page 2 of appendix A). Since this is a Class 2 impacted survey unit, the EMC does not apply.

Of the 20 grids scanned, nine grids had small inaccessible areas due to trees.

Of the 20 grids, a total of about 5.13 square meters was not scanned due to interferences, resulting in approximately 1,132.28 square meters actually scanned in the 2,697 square meter survey unit. This is slightly less than 42 percent of the soil surface area in this unit.

The scans conducted in all 20 grids did not identify any activity in the soils greater than the MDCscan. The Administrative Limit was >160 ncpm. No area greater than 160 ncpm was found in 0L7-2.

6.2.2 Soil samples A total of 11 random start, triangular grid, systematic soil sample locations were defined for the survey unit based on a conservative relative shift of about 2.83.

Using the typical LBGR of 50% of the DCGL, only 11 samples were required, which includes a 20% adjustment. Given the variability used for the survey design (0.35 pCi/gm) and the Administrative Limit of 4.30 pCi/gm, the LBGR used was conservative. No biased samples were required.

None of the design fixed point soil samples in OL7-2 showed activity in excess of the Administrative Limit. Table 3 below shows the Cs-137 results (no other licensed isotopes were detected) for each sample along with the mean, standard 7 of 13

deviation, and range of the soil sample data. Results that are less than MDA are assumed to be positive at the MDA value for the statistics in the table thereby overestimating the mean.

The standard deviation of the samples collected from the survey unit was less than the variability assumed in the survey design, therefore the assessment of variability, relative shift, and number of samples required is consistent between the survey design and the survey results. Based on this assessment, neither changes to the survey design nor additional sampling is required.

Table 3 - Soil sample results for 0L7-2 Sample Cs-137 Number pCi/gm 1 <0.09 2 <0.09 3 0.23 4 <0.17 5 <0.12 6 <0.21 7 0.10 8 0.38 9 <.17 10 <0.21 11 <0.21 Mean 0.18 Std Dev 0.09 Min <0.09 Max 0.38 6.3 Summary for Survey Unit 0L7-3 6.3.1 Scan survey Scan measurements were made in 36 grids using a 2 inch by 2 inch Nal detector with an MDCscan of 5.67 pCi/gm (Table 2 on page 3 of appendix A). The Administrative Limit was 4.30 pCi/gm (Table 1 on page 2 of appendix A) and the adjusted surrogate Cs-1 37 DCGLw for this survey unit was 5.73 pCVgm (Table 1 on page 2 of appendix A). Since this is a Class 2 impacted survey unit, the EMC does not apply.

Of the 36 grids scanned, portions of six grids were inaccessible due to either utility poles or trees. Of the 36 grids, a total of about 6.3 square meters was not scanned due to interferences, resulting in approximately 3,565.27 square meters actually scanned in the 7,500 square meter survey unit. This is slightly more than 47 percent of the soil surface area in this unit.

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The scans conducted in all 36 grids did not identify any activity in the soils greater than the MDCscan. The Administrative Limit was >160 ncpm. No area greater than 160 ncpm was found in 0L7-3.

6.3.2 Soil samples A total of 11 random start, triangular grid, systematic soil sample locations were defined for the survey unit based on a conservative relative shift of about 2.87.

Using the typical LBGR of 50% of the DCGL, only 11 samples were required, which includes a 20% adjustment. Given the variability used for the survey design (0.28 pCi/gm) and the Administrative Limit of 4.30 pCi/gm, the LBGR used was conservative. No biased samples were required.

None of the design fixed point soil samples in 0L7-3 showed activity in excess of the Administrative Limit. Table 4 below shows the Cs-137 results (no other licensed isotopes were detected) for each sample along with the mean, standard deviation, and range of the soil sample data. Results that are less than MDA are assumed to be positive at the MDA value for the statistics in the table thereby overestimating the mean.

The standard deviation of the samples collected from the survey unit was less than the variability assumed in the survey design, therefore the assessment of variability, relative shift, and number of samples required is consistent between the survey design and the survey results. Based on this assessment, neither changes to the survey design nor additional sampling is required.

Table 4 - Soil sample results for 0L7-3 Sample Cs-1 37 Number pCigm 1 0.36 2 <0.10 3 <0.13 4 <0.08 5 <0.13 6 <0.14 7 <0.14 8 <0.10 9 <0.17 10 <0.15 11 0.14 Mean 0.15 Std Dev 0.074 Min <0.08 Max 0.36 9 of 13

7.0 Data Assessment 7.1 Assessment Criteria The final status survey data has been reviewed to verify authenticity, appropriate documentation, quality, and technical acceptability. The review criteria for data acceptability are:

1) The instruments used to collect the data were capable of detecting the radiation of the radionuclide of interest at or below the investigation levels.

2) The calibration of the instruments used to collect the data was current and radioactive sources used for calibration were traceable to recognized standards or calibration organizations.

3) Instrument response was checked before and, when required, after instrument use each day data was collected.

4) Survey team personnel were properly trained in the applicable survey techniques and training was documented.

5) The MDCs and the assumptions used to develop them were appropriate for the instruments and the survey methods used to collect the data.

6) The survey methods used to collect the data were appropriate for the media and types of radiation being measured.

7) Special instrument methods used to collect data were applied as warranted by survey conditions, and were documented in accordance with an approved site Survey Request procedure.

8) The custody of samples that were sent for off-site analysis were tracked from the point of collection until final results were provided.

9) The final status survey data consists of qualified measurement results representative of current facility status and were collected in accordance with the applicable survey design package.

If a discrepancy existed where one or more criteria were not met, the discrepancy was reviewed and corrective action taken (as appropriate) in accordance with site procedures.

The statistical test does not need to be performed for this final status survey since the data clearly show that the survey unit meets the release criteria 10 of 13

because all measurements in the survey units are less than or equal to the DCGLw; however, the statistical tests (DQA Process) are shown in Appendices B, C, and D.

7.2 Summary of Overall Results-0L7-1 had no alarm points during scan surveys .of slightly greater than 55%. of the surface. Scan MDCs were adequate. Eleven soil samples were all less than the DCGLw. Both the scan fraction and number of soil samples meet the LTP and MARSSIM requirements.

OL7-2 had no alarm points during scan surveys of slightly less than 42% of the surface. Scan MDCs were adequate. Eleven soil samples were all less than the DCGLw. Both the scan fraction and number of soil samples meet the LTP and MARSSIM requirements.

0L7-3 had no alarm points during scan surveys of slightly greater than 47% of the surface. Scan MDCs were adequate. Eleven soil samples were all less than the DCGLw. Both the scan fraction and number of soil samples meet the LTP and MARSSIM requirements.

7.3 Survey Variations (Design, survey request, LTP) 7.3.1 Approximately 4.9 square meters of the grids scanned for OL7-1 was inaccessible. The remaining scanned portion constituted slightly greater than 55 percent of the survey unit area: well within coverage requirements for class 2 survey units.

The amount of soil surface area, per Appendix A of this report, was originally estimated to be about 4,120 square meters; however, the true area was closer to 3,761 square meters. A portion of the SSGS concrete pad was thought to be part of the OL7-1 soil survey unit until dirt covering the pad was removed, revealing the presence of concrete, prior to implementing the FSS.

Two sample points were moved to avoid interferences. Sample number one was moved from grid AP134 to AO134 to avoid hitting concrete. Sample number nine was moved approximately nine meters east and only cored to one-half meter to avoid underground communications cabling used by Penelec to control the Saxton sub-station. Earlier in the project, sub-station control was disrupted when the cabling was severed owing to its exact location and depth not being known.

The survey design engineer approved moving the sample points in accordance with Reference 9.8.

Section 6.1.1 makes reference to the existence of an iron storm drain and that it was not surveyed as part of this report. For more information on the site yard drains, see section 2.2.4.1.8.1 of the SNEC LTP, Reference 9.3.

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7.3.2 Approximately 5.13 square meters of the grids scanned for 0L7-2 was inaccessible. The remaining scanned portion constituted slightly less than 42 percent of the survey unit area: well within coverage requirements for class 2 survey units. Grid Al133 was inadvertently-scanned so-it was just added to-the total, thereby increasing surface area scanned in OL7-2.

7.3.3 Approximately 6.3 square meters of the grids scanned for 0L7-3 was inaccessible. The remaining scanned portion constituted slightly more than 47 percent of the survey unit area: well within coverage requirements for class 2 survey units.

7.4 QC comparisons 7.4.1 Scan surveys Numerous grids were partially rescanned as QC duplicates. The QC rescans did not identify any activity above alarm points and so are in agreement with the primary scans. QC rescans were conducted on 120 square meters, 100 square meters, and 200 square meters representing about 5.8, 8.8, and 5.6 percent of survey units 0L7-1, 0L7-2, and OL7-3, respectively. This exceeds the minimum 5% required.

7.4.2 Soil Samples One soil sample each from both 0L7-1 and OL7-3 and two soil samples from 0L7-2 received QC split gamma spectroscopy analyses. These duplicates had good agreement as shown in Table 5 below. Four QC splits out of 33 samples exceeds the 5% minimum criterion.

Table 5 - OL8 QC Split Comparison Sample Point Sample QC Result Result (pCigm)

_(pCi/gm) 0L7-1, SP9 <0.12 <0.12 0L7-2, SP3 .23 <0.21 0L7-2, SP7 I .10 <0.15 0L7-3, SPIO 1<0.15 <0.16 8.0 Final Survey Conclusions The Open Land Area 0L7-1, OL7-2, and 0L7-3 final status surveys were performed in accordance with the LTP, site procedures, design calculations, and Survey Request requirements. FSS data was collected to meet and/or exceed 12 of 13

the quantity specified or required for each survey unit design. The survey data for each survey unit meets the following conditions:

1) The average residual radioactivity in the soils is less than the derived surrogate DCGLw in all three survey units.-- -- -

2) All measurements in all survey units were less than the DCGLw. .

These conditions satisfy the release criteria established in the SNEC LTP and the radiological criteria for unrestricted use given in 10CFR20.1402.

Therefore it isconcluded that the SNEC Open Land Area designated OL7 is suitable for unrestricted release.

9.0 References 9.1 SNEC Facility Site area grid map Drawing number SNECRM-020 9.2 SNEC procedure E900-ADM-4500.60 'Final Status Survey Report" 9.3 SNEC License Termination Plan 9.4 NUREG 1575 Multi-Agency Radiation Survey and Site Investigation Manual" (MARSSIM), revision 1 August 2000 9.5 SNEC Calculation E900-05-022, 'Open Land FSS Design - OL7 Soils"_._.

9.6 COMPASS computer program, Version 1.0.0, Oak Ridge Institute for Science and Education 9.7 VISUAL SAMPLE PLAN computer program, Version 3.0, Battelle Memorial Institute 9.8 SNEC procedure E900-IMP-4500.59, "Final Site Survey Planning and DQA" 9.9 SNEC procedure E900-IMP-4520.04, 'Survey Methodology to Support SNEC License Termination" 9.10 SNEC SR221 for FSS of 0L7-1 9.11 SNEC SR222 for FSS of 0L7-2 9.12 SNEC SR223 for FSS of 0L7-3 10.0 Appendices Appendix A - SNEC Calculation E900-05-022, 'Open Land FSS Design -

OL7" (9 pages plus numerous attachments)

Appendix B - COMPASS DQA Surface Soil Report 0L7-1 (2 pages)

Appendix C - COMPASS DQA Surface Soil Report 0L7-2 (2 pages)

Appendix D - COMPASS DQA Surface Soil Report 0L7-3 (2 pages) 13 of 13

APPENDIX A SNEC Calculation E900-05-022 Open Land FSS Design - OL7 Soils

I , , . , . .; . -'-. *I -

rifinal SNEC CALCULATION COVER SHEET CALCULATION DESCRIPTION' Calculation Number Revision Number Effective Date Page Number E900-05-022 0 1 of 9 Subject Open Land FSS Design - OL7 Soils Question I - Is this calculation defined as 'in QA Scope'? Refer to definition 3.5. Yes 0 No O Question 2- Is this calculaton defined as a Design Calculation'? Refer to definitions 3.2 and 3.3. Yes 0 No a NOTES: If a 'Yes answer is obtained for Question 1, the calculation must meet the requirements of the SNEC Facility Decommissioning Quality Assurance Plan. If a 'Yes answer is obtained for Question 2, the Calculation Originators immediate supervisor should not review the calculation as the Technical Reviewer.

DESCRIPTION OF REVISION APPROVAL SIGNATURES Calculation Originator Technical Reviewer Additional Review Additional Review

Ar4..

• ~4- SNEC CAXLLtLATI't4 SHEET'<

Calculation Number Revision Number Page Number E90005022 0 Page 2 of 9 Subject Open Land FSS Design - OL7 Soils 1.0 PURPOSE  ?

1.1 The purpose of this calculation is to develop a final status survey design for open land area OL7 (soil only) at the Saxton Nuclear Experimental Corporation (SNEC) facility. The non-soil portions of OL7 will be surveyed under Open Land FSS Design - OL7 Paved Surfaces and Concrete, E900-05-028. The OL7 fence surveys will be performed under Miscellaneous Chain Link Fences - Survey Design, E900-05-023.

1.2 Survey Area OL7 is an Impacted Class 2 area which encompasses the old and new access roads, the current personnel office and break room complex, and the count room trailer on the SNEC facility decommissioning project. It covers approximately 17,900 square meters (179 10m x 10m grids). Of that surface area, a bit more than 14,300 square meters is soil and the remaining surface area is comprised of paved areas. Table 5-5 of the SNEC License Termination Plan (LTP) limits the physical size of Class 2 survey areas to between 2,000 and 10,000 square meters. Due to this area constraint, OL7 will be subdivided into three smaller survey units, namely OL7-1 through 0L7-3, containing 6200, 4200, and 7500 square meters, respectively. The corresponding soil areas are 4120, 2696, and 7500 square meters.

1.3 Previous soil samples have indicated that no detectable activity greater than the Administrative Limit (AL) exists in this entire survey area.

1.4 The general layout of the three survey units is shown on Attachment 1-1.

2.0

SUMMARY

OF RESULTS Below is information that should be used to develop a Survey Request (SR) for each of the three survey units.

The US NRC has reviewed and concurred with the methodology used to derive the effective DCGLw value listed below. See also Attachments 2-1 through 2-4 from Reference 3.13.

Table 1, DCGLw Values volumetric DCGLw (pCUg - Cs-137) I 5.73 (4.3 A.L) l NOTE: A.L Is the site Administrative Limit (75% of the effective DCGLw)

Of the 143 equivalent grids in OL7, 106 soil samples were taken from 47 of those grids. No sample exhibited activity greater than 35% of the A.L. The on-site sampling data was used to generate a sigma value (standard deviation) for determining the number of static measurements and soil samples to be taken during FSS. In addition, 21 samples from survey areas OL1 and OL2 were sent off site for "SNEC 11' analyses. OLI and OL2 data were used in this design because only one sample from OL7 was sent off-site for analysis. The expectation is that, by the very quantity of samples taken, the OL1/OL2 data would more accurately represent the ratios of radionuclides present in the soil.

2.1 Survey Design 2.1.1 Scanning of open lands shall be performed using a 2" dia. bv 2" long Na! detector with a Cs-1 37 window setting (Reference 3.1). The window will straddle the Cs-1 37 662 keV full energy peak width (see typical calibration information on Attachment 3-1).

• 1wx. A#

SNECECALCULATIONS

• Calculation Number Revision Number Page Number E900-05-022 0 Page 3 of 9 Subject Open Land FSS Design - OL7 Soils 2.1.2 The instrument conversion factor/efficiency shall not be less than that assumed on Attachment 4-1: 205.6 cpmluR/h - Cs-137.

2.1.3 Other instruments, of the type specified in Section 2.1.1 above, may be used during the final status survey (FSS), but they must demonstrate detection efficiencies at or above the value listed in Section 2.1.2.

Table 2, Soil Scanning Parameters MDCscan (pCUg) - Cs-137 Scan Speed (cml/sec) Maximum Distance from Surface Action Level  % Coverage 5.67 25 4' (gap between detector face & soil surface) > 160 ncpm up to 50%

See Attachment 4-1 2.1.4 If a count rate greater than the action level in Table 2 is encountered during the scanning process, then the surveyor shall stop and locate the boundary of the elevated area. The surveyor should then mark the elevated area with stakes or other appropriate marking methods. Sample the elevated areas(s) IAW SNEC procedure E900-IMP-4520.04 (Reference 3.2), Section 2.2 of this document, and the investigation design.

2.1.4.1 Class 2 soils should be scanned using a serpentine pattern that is -0.5 meters wide.

2.1.4.2As this is a Class 2 survey area, up to 50% of all accessible surfaces are required to be scanned. If all grids are accessible, then 49% of OL7-1, 41%

of OL7-2, and 48% of 0L7-3 surfaces will be scanned. See Attachment 1-1 for grid layouts for the three survey units. Attachment 6 shows 80 grids selected for scanning and provides the grid identification for each.

2.1.4.3 Portions of survey units which cannot be accessed should be clearly noted along with the reason for not completing the survey.

2.1.5 The minimum number of soil sampling points indicated by the COMPASS computer program (Reference 3.3) is 11 for each of the three survey units (see COMPASS output on Attachments 7-1 to 7-7). Sampling depth should be IAW Section 2.2.

The MDCscan (soil) exceeds the effective administrative DCGLw Cs.137 (5.67 pCi/g MDCscan @ 250 cpm background > 4.3 pClg AL); however, given the area factor for the assumed one meter squared elevated area, the scan MDC meets MARSSIM requirements.

2.1.6 VSP (Reference 3.4) is used to plot all sampling points on the included diagrams.

The actual number of random start systematically spaced measurement points may be greater than that required by the Compass computer code because of any or all of the following:

• placement of the initial random starting point (edge effects),

• odd shaped diagrams, and/or

• coverage concerns

-- S1NEC CALCULA-iON1 SHEET Calculation Number Revision Number Page Number E900-05-022 0 Page 4 of 9 Subjed Open Land FSS Design - OL7 Soils (see Attachments 6-1 through 6-6 for VSP sampling point locations) 2.1.7 The starting points for physically locating sample sites in the survey unit are-based.

on measurements from site grid pins (see diagram on Attachments 6-1, 6-3, and 6-5). Remaining soil sampling points are positioned using coordinates developed from these markers and listed on Attachments 6-2, 6-4, and 6-6.

2.1.8 Some sampling points may need to be adjusted to accommodate obstructions within the survey area. Contact the SR coordinator to report any difficulties encountered when laying out systematic grid sampling points.

2.1.9 When an obstruction is encountered that will not allow collection of a sample, contact the cognizant SR coordinatorfor permission to delete the sampling point.

NOTE If remediation actions are taken as a result of this survey, this survey design must be revised or re-written entirely.

2.2 Sample fixed point and elevated areas(s) IAW SNEC procedure E900-IMP-4520.04 (Reference 3.2) and the following.

NOTE Since the site surface dose model is 1 meter in depth, samples representative of the entire one meter thick dose model layer must be collected to satisfy the sampling requirements of Section 2.1.5 (of this document). This should be done by obtaining a well mixed sample of an entire one meter deep core. Sections 4.2.3, 4.2.6, or 4.2.7 of site procedure E900-IMP-4520.04 are applicable when satisfying Section 2.1.5 of this document. Sampling due to an instrument alarm condition should also be of the entire one meter of soil/material.

2.2.1 Clearly mark, identify and document all sample locations.

2.3.1 Sample any location that is above the action level cited in Table 2.

2.3.2 Maintain chain-of-custody requirements on all design fixed point and action level samples (Reference 3.12).

3.0 REFERENCES

3.1 SNEC Calculation No. E900-03-018, Optimize Window and Threshold Settings for the Detection of Cs-1 37 Using the Ludlum 2350-1 and a 44/10 Nal Detector", 817/03.

3.2 SNEC Procedure E900-IMP-4520.04, Survey Methodology to Support SNEC License Termination>.

3.3 COMPASS Computer Program, Version 1.0.0, Oak Ridge Institute for Science and Education.

3.4 Visual Sample Plan, Version 3.0, Copyright 2004, Battelle Memorial Institute.

3.5 SNEC Facility License Termination Plan.

3.6 SNEC Procedure E900-IMP-4500.59, "Final Site Survey Planning and DQA.

3.7 GPU Nuclear, SNEC Facility, "Site Area Grid Map", SNECRM-020, Sheet 1, Rev 4,1/18/05.

~4$~X~SISNEC CAK iiATION.SHEET" calculation Number Revision Number Page Number E900-05-022 0 Page 5 of 9 Subject Open Land FSS Design - OL7 Soils 3.8 SNEC Calculation No. E900-03-012, Effective DCGL Worksheet Verification.

3.9 SNEC Procedure E900-IMP-4520.06, "Survey Unit Inspection in Support of FSS Design".

3.10 NUREG-1575, "Multi-Agency Radiation Survey and Site Investigation Manual", August, 2000.

3.11 Microsoft Office Excel, Version 11.0.5612, Microsoft Corporation Inc., 1985-2003.

3.12 SNEC Procedure E900-ADM-4500.39 "Chain of Custody for Samples" 3.13 DCGL Calculation Logic- CV Yard Soil & Boulders, E900-04-006.

3.14 Personal conversation between Tristan Tritch and with Rob Marquette, 3/24105.

4.0 ASSUMPTIONS AND BASIC DATA 4.1 The COMPASS computer program is used to calculate the required number of random start systematic samples to be taken in the survey unit (Reference 3.3).

4.2 Characterization soil samples from this area are used as the initial estimate of variability.

These results are shown on Attachments 8-1 and 8-2.

4.3 The MARSSIM Sign Test will be applicable for this survey design. No background subtraction will be performed under this criterion during the DQA phase.

4.4 The Visual Sample Plan (VSP) computer code (Reference 3.4) locates the required number of fixed survey points, determined by COMPASS, on the survey map for each survey unit.

4.5 References 3.5 and 3.6 were used as guidance during the survey design development phase.

4.6 Background has been measured in the area and is approximately 250 crm (Reference 3.14).

4.7 The determination of the physical extent of this area is based on the drawing Reference 3.7.

4.8 There has been no known remediation in Area O07.

4.9 This survey design uses Cs-137 as a surrogate for all SNEC facility related radionuclides in the survey unit. The effective DCGLw is the Cs-137 DCGLw from the SNEC LTP (6.6 pCi/g) adjusted (lowered) to compensate for the presence (or potential presence) of other SNEC-related radionuclides. In addition, an administrative limit (75%) has been set that further lowers the permissible Cs-137 concentration to an effective surrogate DCGLw for this survey area.

4.10 The sample database contained only one sample, which was assayed both on site and off site, with which to determine the effective radionuclide mix for Area OL7. In order to obtain a more representative mix of expected radionuclides, data from OL1 and OL2 were used instead. This list is shown on Attachments 2-1 through 2-3 and includes 21 analyses.

The decayed set of sample results were input to the spreadsheet titled "Effective DCGL Calculator for Cs-1 37" (Reference 3.8) to determine the effective volumetric DCGLw values

-~SECLCULATION SHEET-_--

Calculation Number Revision Number Page Number E900-05-022 0 Page 6 of 9 Subject Open Land FSS Design - OL7 Soils for the three survey units. The output of this spreadsheetis-shown-on-Attachment-2-4 which is copied from Reference 3.13. The spreadsheet was previously reviewed.

The Nal detector scan MDC calculation is determined based on a 25 cm/sec scan rate, a 1.38 index of sensitivity (95% correct detection probability and 60% false positive) and a detector sensitivity of 205.6 cpm/uR/h for Cs-1 37. Additionally, the detection system incorporates a Cs-1 37 window that lowers sensitivity to background in the survey unit. The resulting background is approximately 250 cpm (Reference 3.14) for most locations in OL7.

4.11 The survey units described in this survey design were inspected. A copy of the OL7 specific portion of the SNEC facility post-remediation inspection report (Reference 3.9) is included as Attachment 9-1.

4.12 No special area characteristics including any additional residual radioactivity (not previously noted during characterization) have been identified in this survey area.

4.13 The decision error for this survey design is 0.05 for the a value and 0.1 for the P value.

4.14 'Special measurements", as described in the SNEC LTP sec 5.5.3.4, are not included in this survey design.

4.15 No additional sampling will be performed IAW this survey design beyond that described herein.

4.16 SNEC site radionuclides and their individual DCGLw values are listed on Exhibit 1 of this calculation.

4.17 The survey design checklist is listed in Exhibit 2.

4.18 Area factors are shown as part of COMPASS output (see Attachment 7-1) and are based on the Cs-137 area factors from the SNEC LTP.

5.0 CALCULATIONS 5.1 All calculations are performed internal to applicable computer codes or within an Excel spreadsheet.

6.0 APPENDICES 6.1 Attachment 1-1 is a diagram of survey units OL7-1 through OL7-3.

6.2 Attachments 2-1 through 2-4 show the DCGL Calculation Logic - CV Yard Soil & Boulders (Reference 3.13).

6.3 Attachment 3-1 is a copy of the calibration data from typical Nal radiation detection instrumentation that will be used in this survey area.

6.4 Attachment 4-1 is the MDCscan calculation sheet for volumetric materials in pCi/g.

6.5 Attachment 5-1 is the MicroShield dose rate calculation results for 6" thick soil used to determine the exposure rate from a 1 pCi/cM 3 Cs-137 source term in an end-cylinder geometry.

6.6 Attachments 6-1 through 6-6 show both the random soil sampling points and the biased scan locations and reference coordinates for Survey Units OL7-1 through OL7-3.

AlSNEC CALCULATION SHEET v Calculaton Number Revision Number Page Number E900-05-022 0 Page 7 of 9 Subjed Open Land FSS Design - 0L7 Soils 6.7 Attachments 7-1 through 7-7 are COMPASS outputs for Survey Units 0L7-1 through 0L7-3 showing area factors, the number of sampling points in each survey unit, and prospective power.

6.8 Attachments 8-1 and 8-2 show the soil variability results for samples from 0L7 based on all available data taken from the area.

6.9 Attachment 9-1 is a copy of the inspection report for 0L7.

Exhibit I SNEC Facility Individual Radionuclide DCGL Values (a) 25 mremly Limit 4 mrem/y Goal 25 mremly Limit (All Pathways) (Drinking Water)

Radionuclide Surface Area Open Land Areas Open Land Areas (b)

(dpml100cm2 ) (Surface & Subsurface) (Surface & Subsurface)

(pCUg) (pCUg)

Am-241 2.7E+01 9.9 2.3 C-14 3.7E+06 2 5.4 Co-60 7.1 E+03 3.5 67 Cs-137 2.8E+04 6.6 397 Eu-152 1.3E+04 10.1 1440 H-3 1.2E+08 132 31.1 Ni-63 1.8E+06 747 1.9E+04 Pu-238 3.OE+01 1.8 0.41 Pu-239 2.8E+01 1.6 0.37 Pu-241 8.8E+02 86 19.8 Sr-90 8.7E+03 1.2 0.61 NOTES:

(a)While drinking water DCGLs will be used by SNEC to meet the drinking water 4 mrem/y goal, only the DCGL values that constitute the 25 mrem/y regulatory limit will be controlled under this LUP and the NRC's approving license amendment.

(b) Usted values are from the subsurface model. These values are the most conservative values between the two models (i.e.,

surface & subsurface).

Calculation Number Revision Number Page Number E900-05-022 0 Page 9 of 9 Subject Open Land FSS Design - 0L7 Soils T Exhibit 2 Survev Desion Checklist Calculation No. Location Codes E900-05-022 OLT ITEMl REVIEW FOCUS Status Reviewer (Circle One) Initials & Date Has a survey design calculation number been assigned and is a survey design summary 1!g~W/A A, description provided? (I _______0/0/a 2 Are drawings/diagrams adequate for the subject area (drawings should have compass headings)? N____

3 Are boundaries properly identified and is the survey area classification clearly indicated? c6 3 N/A 4 Has the survey area(s) been properly divided into survey units LAW EXHIBIT 10 fs N/A ,

5 Are physical characteristics of the areallocation or system documented?

6 Is a remediation effectiveness discussion included? N/A 7 Have characterization survey and/or sampling results been converted to units that areA comparable to applicable DCGL values? N/A 8 Is survey and/or sampling data that was used for determining survey unit variance included? N4 /ip 9 Is a description of the background reference areas (or materials) and their survey and/or Yes, /A sampling results included along with a iustification for their selection? Ys 9X§/M6 10 Are applicable survey and/or sampling data that was used to determine variability included? e N/A -

11 Will the condition of the survey area have an impact on the survey design, and has the )s

//

probable impact been considered in the design?

Has any special area characteristic including any additional residual radioactivity (not previously noted during characterization) been identified along with its impact on survey 12 design? y NMA 13 Are all necessary supporting calculations and/or site procedures referenced or included? s N/A ,

14 Has an effective DCGLw been identified for the survey unit(s)? N/A 15 Was the appropriate DCGLEUc included In the survey design calculation? Yes, 16 Has the statistical tests that will be used to evaluate the data been identified? , N/A ZZ>1/V' -. 1 17 Has an elevated measurement comparison been performed (Class 1 Area)? Yes2, C/

18 Has the decision error levels been identified and are the necessary justifications provided? , N/A Ad j 19 Has scan instrumentation been identified along with the assigned scanning methodology? AO NMA 20 Has the scan rate been identified, and is the MDCscan adequate for the survey design? ________

21 Are special measurements e.g., in-situ gamma-ray spectroscopy required under this design,.

and is the survey methodology, and evaluation methods described? Yes__Adtt 22 Is survey instrumentation calibration data included and are detection sensitivities adequate? ,N/A 23 Have the assigned sample and/or measurement locations been dearly identified on a diagram N/A Y' 6 or CAD drawing of the survey area(s) along with their coordinates? (WM 24 Are investigation levels and administrative limits adequate, and are any associated actions (e NMA

____clearly indicated?

25 For sample analysis, have the required MDA values been determined.? oe WA 4/ 9//J 26 Has any special sampling methodology been identified other than provided in Reference 6.3? Yes,(e R ./

7 NOTE: a copy of this completed form or equivalent, shall be included within the survey design calculation.

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DCGL Calculation Logic-CV Yard Soil & Boulders Survey Unit: SNEC Containment Vessel (CV) Yard Soil and Boulders

11.

Description:

The purpose of this calculation is to determine a representative isotopic mix for the CV Yard Soil and associated Boulders from available sample analyses. The effective volumetric DCGLWs are then determined from the mean percent of applicable samples.

Ill. Data Selection Logic Tables: The radionuclide selection logic and subsequent DCGL calculations are provided in six (6) tables. These tables were developed using Microsoft Excel. Table explanation is as follows.

Table 1: Data Listing - This table, which has been extracted from a larger database, provides a list of the most representative sample analyses. Results are from scoping, characterization, and pre/post remediation surveys. The samples consist of soil media that was taken in support of the aforementioned surveys. As applicable, a sample number, sample location/description, radionuclide concentration, analysis date are provided for each sample. Positive nuclide concentrations are noted with yellow/shaded background fields while MDA values are noted in the gray shaded fields.

Table 2: Decayed Listing - This table decays the data from Table 1. Half-life values (days) are listed above each respective nuclide column. Samples are decayed from the respective analysis date to January 15, 2004. Positive results are denoted in a yellow background field while MDA values are noted in the gray shaded fields.

Table 3: Decayed Listing of Positive Nuclides & MDAs Removed - This table provides the best overall representation of the data. Non-positive nuclide columns have been removed as well as all the MDA values. Therefore, 11 nuclides have been reduced to four (4).

Table 4: Ratio to Cs-1 37 for Positive Nuclides - This table provides the calculation methodology for determining the surrogate ratio to Cs-137 for each radionuclide. From this information the mean, sigma, and mean % of total are calculated. The mean % of total values is used to calculate the volumetric DCGLW per MARSSIM equation 1-14. See Table 5. Note that the mean percent values were averaged using only the positive sample results in each column. In some cases only a single nuclide value (e.g. Sr-90) had a positive result. This value is listed as the value in the mean result field. This results in higher 'mean percent of total' values in the mix, which are conservative.

Note: From Table 4 only the "mean % of total" values are used as input to the "Effective DCGL Calculation Spreadsheet" as illustrated in Table 5.

Table 5: Effective DCGL Calculator for Cs-1 37 (in pCi/g) - This table provides the surrogate volumetric modified Cs-137 DCGLW calculation results from data derived from Table 4.

IV. Summary - Since the CV Yard and Boulders are volumes of soil or rock material, existing in place or in a pile, the release limit is primarily based on the volumetric DCGLW. Using the above data selection logic tables the calculated Cs-1 37 volumetric DCGLW is 5.73 pCi/g. This value will be reduced by 25% as part of SNEC's requirement to apply an administrative limit as discussed in the License Termination Plan (LTP).

1

TABLE 1 -Data Listing (pCUg)

Pu-23S I PuW241 F C-14 5f5 2AEM8 I :7E. 2.34E.0 I 4AREoO1I 1.30E-1 4A6E12 3.27E42 I VZE60 12*41 I 5 SXSLI115 North CV Yrrd SrOJAY-128,854'El, Samplet02 01 4JA40 I ;5.32 6 SXSLI122 SoIt CV YarMSoll AY-129,798'El, Sample 2,OL 3A&4E 0 5t 42 7 SXSL1130 North CV Yard Soil AX-129,503 El, Sample#4, 01.1 13" U*428 1 :tn T7111M3 to"E4 I 2ADEOR39" m CV. a00'El. OL1 ¶MIE4 I &.38E0 11.1 _ 1ME42 7-W31 E0 IJ 11 I SXSL2940 10Depth, 01.1 2."4 IME.OI 64m1 9.; E.03 13 SXSL2871 CVArea- 3M 6*2  : :TA:

14 SXSI.2872 CVArea - EastYard Dirt Pib - t)l 4 15 SXSL3140 EastCV Yard,Soil Pile a 6on West Side [8" Depth),OL1 41 I M3 0 J I0 M 1 396.0 0 I 3001.01 19 I SXS9.153 East CVY 6"Depthl. OL1. I11 21 SX9L;;42 ... 2W240 3.251 22 1 SXSL4143 _1 223140 I 316.2 3

23 SXSL4149 I 1 _1 2A2RS1; Z.77.1M2

_ TABLE 2 eDecayed LUstina (DCU I T 112 l T12 I T112 l T1V2 l T12 I T112 I Oecaytgte I I i1 5259.6 I 209282.5 1 36561.5251i -I I I P..241 I C-14 I 1463 I E I ET (I I i 13AE014 I 9-34E0 l 3.SE0 I .12E.01 14,200 11065 I I February KEY I _ IYellow Shaded Background - Positive Result IIGray Shaded Background = MDA 2

CO}

TABLE 3 - Decayed Listing of Posiive Nucildes & MDAs Removed (pCUg)

SHECSample No LocationlOescription H-3 Sr-90 Co-60 Cs-137 Total pCilg I CV Tunnel CV Tunnel Sediment Composite, OLI 9.01E-00 8.59E-M 1.17E403 1178.89 2 SX9SL99219 Subsutace Sample #29 (0-65),AY-128, OLI 0.54 3 SXSLI063 North CV Yard Soil BA-127, 812' El, Sample # 6, 0L2 4.2 0 8 .06 4 SXSLIO89 North CV Yard SodiAY-127, 810' El, Sample # 3, 0L1 2.70Ewo 124E.O 4.02 6 SXSLI1Ii North CV Yard Soil AY-128, 804' El, Sample #2, OLI t 74E. 0 0 6.21 6 SXSLI122 North CV Yard Soil AY-129, 798' El, Sample # 2, OL1 3.15E+oO 4 7.76 7 SXSL1I3O North CV Yard SoidAX-129, 803' El, Sample # 4, DL 4.0E _ _ 2.44E2 2. 1 26.42 8 SXSLI132 North CV Yard Soil AZ4130, Sample # 6, OLI 2.73E 250E 6.23 9 SXSL1270 AX-129, 3-3, Soil, CV SESide 5' From CV, 800' El., OLI 2 tE t 21.82 10 SXSL1281 AX-128, 3-1, Soil, CV Tunnel East 5' From CV, 800 El, OLI _4.14E+ I 4.14 11 SXSL2649 Anulus Well, A-2, to 10' Depth, OLI 5.74E*I 0.67 13 SXSL2871 CV Area - East Yard Dirt Pile - Middle, 112Way Up, OLI 5,3E41 0.54 14 SXSL2872 CV Area - East Yard Dirt Pile - Bottom (also top center), OLI 9.51E02 0.10 15 SXSL3140 East CV Yard, Soil Pile a 6' on West Side (6" Depth), OLI 7.93E 0.80 18 SXSL3142 Soil Pile, CV Yard, Three Feet on East Side, SR-37, OLI 5.SIE.41 0.58 17 SXSL3145 East CV Yard, Soil Pile 0 3' on East Side (6" Depth), OLi 1.00 1.22 18 SXSL3149 Soil Pile, CV Yard, Six Feet on East Side, SR-37,OLi 2 f 0.29 19 SXSL3153 East CV Yard, Soil Pile ia Top (6 Depth), OLI 2.DE1 0.29 21 SXSL4142 CV Yard Soil - West Side, API-7, DLI 8_ 0.89 22 SXSL4143 CV Yard Soil -West Side, API-7, OL1 4.97E 0.60 23 SXSL4149 CV Yard Soil - Vest Side, API-7, OLI 6.74E402 3I /E 3.94 TABLE 4 - Ratdo To Cs-137 for Positve Nuciides SNECSample No Locatlon/Description H-3 Sr-90 Co-60 Cs-137 Total I CV Tunnel CV Tunnel Sediment Composite, OLI 7.71E.03 7.35E.04 1 1.o1 2 SX95L99219 Subsuface Sample #29 I0C5'),AY-1228, OLI _ _ 10E4 1.00 3 SXSL1063 North CV Yard Soil BA-127, 812 El, Sample # 5, 0L2 4.91E+.0 1 00 4 6.91 4 SXSL1089 North CV Yard Soil AY-127, 810 El, Sample # 3, OLI 223E+ 1 3.23 5 SXSLIIS North CV Yard Soil AY-1 28,804' El, Sample #2, L1 2.57E+3 _ _ 1AOE' 3.67 6 SXSL1122 North CV Yard Soil AY-129, 798' El, Sample #2, OLI 6.85E.O1 t.OWEa 1.68 7 SXSLI130 North CV Yard Soil AX-129,803'El, Sample #4,OL1 2.IOE41 1.12E403 1.Eo 1.21 8 SXSL1132 North CV Yard Soil AZ-130, Sample # SLI 16 9E4LI 2.09 9 SXSL1270 AX.129, 33, Soil, CV SESide ' From CV, 800' El., OLI 1'C0 1.00 10 SXSL1281 AX-128, 3.1, Soil, CV Tunnel East S' From CV, 800 El, OLI 1.00 100 11 SXSL2649 Anulus Well, A-2, 6 to 10' Depth, DL1 1 0 1.00 13 SXSL2871 CV Are - East Yard Dirt Pile - Middle, 1t2 Way Up, OLI 100E4 1.00 14 SXSL2872 CV Area - East Yard Dirt Pile - Bottom (also top center), OLI lM 1.00 15 SXSL3140 East CV Yard, Soil Pile 0 6on West Side (6BDepth), OLI iAOE"0O 1.00 16 SXSL3142 Soil Pile, CV Yard, Three Feet on East Side, SR-37,OLI w  ! 1.00 17 SXSL3145 East CV Yard, Soil Pile 0 3' on East Side (6BDepth), OLI 1.00 18 SXSL3149 Soil Pile, CV Yard, Six Feet on East Side, SR-37, OLI 1.wE 1.00 19 SXSL3153 East CV Yard, Soil Pile @ Top (6" Depth), OLI t.00E400 1.OO 21 22 23 1 SXSL4142 SXSL4143 SXSL4149 I

I rV Yard Sait - W.at Sidt.. APi 7 fm I CV" CV',

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I 1.74E.02 j

I IJKW+M 1G 4' 1.+00 0 1 .n 1.00 1.02 Mean: 1.95E.00 7.71E-03 6.42E.03 1 2.96 Sigma= 1.708 i _ 0.010 0.000  : :v.>.::

Mean % of Total= 65.79% 1 0.26% 0.22% [ 33.74% 100.00%

3 co-n

Table 5 i . i I Ii l SNEC AL - 75D l Total Activity Limit DCGLw l AdminIstrative Limit I I I

Effective DCGL Calculator for Cs-137 (in pClig) 1 16.98 IpCiig 1 12.74 IpCI/g ]

! i I I II SAMPLE IlUMBER(s)=ICV YARD SOIL & BOULDER SAMPLES

! I i  !;: ,- Cs-137 Umit i! rr Cs-137 Administrativhe UmIt 17.45% 25.0 mrem,'y TEDE Limit I S.73 1pCI/g 1 4.30 IPCI/g 7.79%  ; 4.0 mremv Drinkina Water IDV) Limit iV Check for 25 mrem/y Sample Input (PClD, uCI, % 25 mremry TEDE 4 mremty DW A -Allowed pCl'g for B - Allowed pCilg Value Checked from This Sample I This Sample Isotope of Total, etc.) ' of Total Limits (pCi'g) Limits (pCI/g) 25 mremly TEDE for 4 mremty DW Column A or B mremy TEDE mremly DWV Am-241 0.000% 9.9 2.3 0.00 0.00 0.00 0.00 0.00 Am.241 2 C-14 0.000% 2.0 5.4 0.00 0.00 0.00 0.00 0.00 C.14 3 Co-60 0.0064 0.216% 3.5 67.0 0.04 0.08 0.04 0.05 0.00 Co-60 4 Cs-137 1.0000 33.738% 6.6 397 5.73 12.83 5.73 3.79 0.01 Cs.137 6 Eu.152 0.000% 10.1 1440 0.00 0.00 0.00 0.00 0.00 Eu.152 6 H.3 1.9499 65.786% 132 31.1 11.17 25.02 11.17 0.37 0.25 H.3 7 M-63 0.000% 747 19000 0.00 0.00 0.00 0.00 0.00 II-63 B Pu.238 0.000% 1.8 0.41 0.00 0.00 0.00 0.00 0.00 Pu.238 9 Pu.239 0.000% 1.6 0.37 0.00 0.00 0.00 0.00 0.00 Pu.239 10Pu.241 0.000% 86 19.8 0.00 0.00 0.00 0.00 0.00 Pu.241 II Sr-90 0.0077 0.260% 1.2 0.61 0.04 0.10 0.04 0.16 0.05 Sr-90 2.96E500 I 100.000% 16.98 38.03 16.98 4.364 0.312 Maximum Permissible Maximum To Use This Information, pCI/g Permissible pCifg Sample Input Units Must Be In

_____I (25 mremtyl-.- -- I (4 mremfvl L -

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4

2350 INSTRUMIENT AND PROBE EFICIENCY CHART 7101/04 (Typical 2" by 2" Nal (Cs-137 W) Conversion Factors)

Inst.' l Cal Due l AP l f Probe ; I Cal Due I cpmlmRlh 98625 'I I R211680I.05 Pk I 2 14.8 8 2 98b47  ! /1 91x(1 G &Y 1211667 Pk I 5i.Mg/o 218.80)7 I

I I I I _I 1i &Y. 21 2 687 -P 5!I9/0 I 2 I3.53' II7573 I 1 1674 Pk J 51 18/0. I 2... 17 3 l8/ / ~ Y I _ _ _ _I 2- - 51 8/ 0 5 I17566 419i05 G&R l l185852 Pk I 4/13/05 l 209.h2 126183 I 11/19/04 E3&R 20628() Pk 12l12/04 1 190,907 129429) 1I/3i04 4 _&_ 2u62-8X3 Pk 2_ 10/31/04 177185

- _ --1 -I_ --_ I _'_ 1 I _ _ _ _ _

126(198 11I10 3/0 R4N&-W _9621 Pk 5/25/05 209.1 L I_ _ _ I _ _ _ _ I 1 __ 1 _ 1_

126172 6/07/05 I CG&W l l 196022 6/07/05 l 208.302

_ _ _--__ _ I' _ -- _ - I '_ _ - _ '---_ 1 1 _ _ _ _ _ _

.1294(1 409/05 &wk _ 10938 Pk 4/14/05 J 205.603 120.588 6/08/05

_ 1

• B&W Ij _ _1j 1858441 Pk Ij 6/09/05 _ _ 1 _

216.654 953 , 1 I 6. 25;05 P& W I (I25o8f) ./2.8/05 L -rs I7.9))

2350 INSIRUMET AND PROBE EFF3KIENCY CHART 7/01/04 (Typica1 43-68 Beta Efficiency Factors)

F Ticent 'instrutmerntlPrebc Cnl Duc lI11:It . !141:,

INST 43-68 PROBE 4410 PROBE BET INST # C/ PROBE C/D PROBE C/D BET AIA 79037 04/05/05 122014 04/23/05 4 s..2.'. N/A 1 nA '1UVI 'Qi" nr ht I _--. I -4 I L.C.U I£00 I U5W91 m6 ln;7/U5 I7

_ .A 28.21/a

._ NIA-126218 01/08/0' 5 095' flfla

~su n I Ui/U'9I5

- . I 27 -9°/ WIA

- - . V I AI "A 4 ATT7*Aff9T - t.

Nal Scan MDC Calculation MDCscan 5.6740 pCi/g for Open Land Area OL7 b = background (cpm) bi = background counts in the observation interval (counts)

Conv = Nal detectorlmeter calibrated response (cpm per uRlhr) d = index of sensitivity from MARSSIM table 6.5 based on 95% detection and 60% false positive HSd = elevated measurement spot diameter (centimeters)

MDCscan = Minimum Detectable Concentration for scanning (pCVg)

MDCRi = Minimum Detectable Count Rate in (ncpm)

MDCRsurv = MDCRi adjusted for the human performance factor p (ncpm)

MDER = Minimum Detectable Exposure Rate (uR/hr)

MSoutput = MicroShield derived exposure rate for 1 pCig of contaminant (mR/hr)

Oi = Observation interval (seconds) p = human performance adjustment factor (unitless)

SR = Scanning movement rate (cm/sec)

DCDLeq = net count rate equivalent to the adjusted DCGL (ncpm) b= 250 cpm HSd = 56 cm SR = 25 cm Conv = 1 205.6 lcpm/uRlhr MSoutput = 1.369E-04 JmR/hr per pCVg DCGL= 4.3 pCilg HSd = 2.2400 = Oi (sec)

SR b*Oi = 9.3333 = bi (counts) 60 sec/min d'sqrt(bi)*60 = 112.9278 = MDCRi (ncpm)

Oi MDCRi = 159.7040 = MDCRsurv (ncpm) sqrt(p)

MDCRsurv = 0.7768 = MDER (uR/hr)

Conv MDER = 5.6740 = MDCscan (pc/g)

MSoutput*1000 uR/mR MDCsurv*DCGL = 121.0306 = DCGLeq (ncpm)

MDCscan ArAa#1fn7 4-(

MicrnShield v5.05 (5.0l5-00121)

GPU Nuclear Page :1 Fie Ref:

DOS FPe :MODELMS5 Date:

Rum Date  : September 23.2003 8y.

Rtu Time :243.26 PM Checked:

Dwiration :00.00o02 Case

Title:

Cs-1 37 Soil

Description:

Model for Scanning Geometry: n - Cylinder Volume - End Shields Source Dimensions rHeight 15.24 cm 6.0inl Radus 28.0cm 11.Oin Dose Points A I X I Y zZ t 1 0cm 25.4 cm 0 cm

.O.Oin 10.0in O.Oin Shields Shield tlame l Dimension l Matetial Density z

Sowuce 3.75eiO4 cn? Concaete 1.6 Ail Gap Ai 0.00122 Source Input Grouping Methodn: Actual Photon Energies flucdde l curie: l heceteiels l uCi/cmh l Bq/cmV Da*137m 5.6815e-008 2.1022c*003 1.5136e 006 . 5.6003e(002 Cs137 6.0050e00 2.2221e4003 1.60Oe-006 5.920e-)002 Buildup The material reference is: Source Integration Parameters Radal 50 Cikctuerential 50 Y Diection faxial) 50 Results Eneg Activiy Fluence Rate Fluence Rate Exposue Rate Exposure Rate MeV Iphotons/sec MeV/cdr/sec MeV/cm'?/sec rrJRAi mnR/h MeNo Bucip With BuOdup No Buildup With Buildup 0.0318 4.352etO1 7.617e-06 9.220e-06 6 345e-08 7.680e 08 0.0322 8.030e*01 1.465e05 1.784e-05 1.179e 07 1.436e-07 0 0364 2.922e*01 8.1le-06 1.160e-05 4 613e 08 6.024e 08 0 6616 1.892es03 7.060eO02 1.260e01 1.369e-04 2.443e-04 TOTALS: 2.045e+03 7.063e-02 1.261e-01 1.371e04 2446e-04 .Al.1.

.tp; -

I -

ArTrp4WNT

Survey Unit O1-7-1 (soil) hL>Q=W Fn0 0 0 0 0 OO ) 0gOi

/ ~AS121-

\' 0 0 0 O 0 0/'oooZ

-AQ~A128 /-

l 0 I 0 0 coDU/ AR118

,,. o 4Yo

) 0 ° 0 I' 0 0

+ ty/AN124

° - C 0 0 8770 ( 0 .

Sample Locations and Scan Survey Grids for Survey Unit 0L7-1 (soil)

VSP provides survey points using E scale relative to the southwestern comer of the survey unit. This is cumbersome as field personnel must measure over large distances (sometimes hundreds of meters) from the single reference point To remedy this situation, this spreadsheet provides the VSP survey points based on the actual location within each grid.

To identify soil sample locations, start at the grid identifier below left. Go east the number of meters under the "E" column and then move north the number of meters in the "N" column. For simplicity, all measurements have been rounded to thie nearest tenth of a meter.

To complete scan surveys, use the 25 scan locations listed below the soil sampling locations.

These grids and partial grid areas should be scanned 100%.

x Y Grid E N coordinate coordinate Location ID (meters) (meters) (meters) (meters) 1 AP134 8.3 4.7 28.3416 54.6667 2 AP132 9.1 4.7 49.1386 54.6667 3 AP130 9.9 4.7 69.9355 54.6667 4 AL130 9.9 8.6 69.9355 18.6454 5 AL127 0.7 8.6 90.7324 18.6454 6 AL125 1.5 8.6 111.5294 18.6454 7 AK124 1.9 0.6 121.9278 0.6347 8 AK122 2.7 0.6 142.7248 0.6347 9 AL121 3.1 8.6 153.1232 18.6454 10 AP121 3.1 4.7 153.1232 54.6667 11 AR120 3.5 2.7 163.5217 72.6774 Scan Grid Scan Grid Scan Grid Location ID Location ID Location ID 1 AP134 9 AL136 17 AL128 2 AP132 10 AL134 18 AL126 3 AP130 11 AL132 19 AK125 4 A0135 12 AM131 20 AK123 5 A0133 13 AM129 21 AK121 6 A0131 14 AM127 22 AM121 7 A0129 15 AM125 23 A0121 8 AN136 16 AL130 24 AQ121 25 AR120 AT34? (W' (O -

Survey Unit 0L7-2 (soil)

Z 0 , 2. 711271 ti 0 0 0 0 0 0 0 0 0  !----& 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 O o . 0 0 0 0 0 0 0 0 0 0 0 AJ135 + z AH130 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 G 0 0 0 0 0 G 0 Lv AF127 o o 0 0 0 0 2 0 0 0 0 0 i

+ 1 o o 0 0 0 0 0 0 0 , AD125 AF13; AD116 - ,

0 0 0 0 o o 0 0

/

Sample Locations and Scan Survey Grids for Survey Unit 0L7-2 (soil)

VSP provides survey points using ascale relative to the southwestern comer of the survey unit. This is cumbersome as field personnel must measure over large distances (sometimes hundreds of meters) from the single reference point To remedy this situation, this spreadsheet provides the VSP survey points based on the actual location within each grid.

To identify soil sample locations, start at the grid identifier below left. Go east the number of meters under the "E" column and then move north the number of meters in the "N" column. For simplicity, all measurements have been rounded to the nearest tenth of a meter.

To complete scan surveys, use the 19 scan locations listed below the soil sampling locations.

These grids and partial grid areas should be scanned 100%.

x Y Grid E N coordinate coordinate Location ID (meters) (meters) (meters) (meters) 1 AK135 0.7 3.9 0.7096 93.925 2 AK134 7.5 3.9 17.5317 93.925 3 A1133 5.9 9.4 25.9428 79.3566 4 AH134 7.5 4.8 17.5317 64.7883 5 AG133 5.9 0.2 25.9428 50.2199 6 AG131 2.8 0.2 42.7649 50.2199 7 AE129 8 5.7 67.9981 35.6515 8 AD130 9.6 1.1 59.587 21.0831 9 AD128 6.4 1.1 76.4091 21.0831 10 A8122 5.3 6.5 135.2865 6.5148 11 AB120 2.1 6.5 152.1086 6.5148 Scan Grid Scan Grid Scan Grid Location ID Location ID Location ID I AK134 7 AF131 13 AC124 2 AJ135 8 AE130 14 AC122 3 A1134 9 AE128 15 AC120 4 A1132 10 AD129 16 ACI 18 5 AH133 11 AD127 17 AB121 6 AG132 12 AC126 18 AB1 19 19 AB1 17 A-htM4MENTr (o-

Survey Unit 0L7-3 AZI19 AS121 o0 I

I i o110E/ 'I o o Tr9AENT- C 5

~.*

Soil Sample Locations and Scan Survey Grids for Survey Unit 0L7-3 VSP provides survey points using c'scale relative to the southwestern comer of the survey unit. This is cumbersome as field personnel must measure over large distances (sometimes hundreds of meters) from the single reference point To remedy this situation, this spreadsheet provides the VSP survey points based on the actual location within each grid.

To identify soil sample locations, start at the grid identifier below left. Go east the number of meters under the "E" column and then move north the number of meters in the "N" column. For simplicity, all measurements have been rounded to the nearest tenth of a meter.

To complete scan surveys, use the 36 scan locations listed below the soil sampling locations.

These grids should be scanned 100%.

x Y Grid E N coordinate coordinate Location ID (meters) (meters) (meters) (meters) 1 AC1I6 2.7 0.9 52.691 10.9047 2 AE1 15 6.7 5.2 66.7203 35.2042 3 AG113 0.7 9.5 80.7496 59.5037 4 AL1I3 0.7 8.1 80.7496 108.1027 5 AO1 15 6.7 2.4 66.7203 132.4022 6 AT120 0.6 1 10.603 181.0012 7 AT118 8.7 1 38.6617 181.0012 8 AT 15 6.7 1 66.7203 181.0012 9 AV119 4.6 5.3 24.6323 205.3006 10 AV116 2.7 5.3 52.691 205.3006 11 AX 18 8.7 9.6 38.6617 229.6001 Scan Grid Scan Grid Scan Grid Location ID Location ID Location ID 1 AC116 13 ALI13 25 AT119 2 AD115 14 AM1I4 26 AT117 3 AD113 15 AN 15 27 AT115 4 AEI16 16 AN113 28 AU118 5 AE114 17 A0114 29 AUM16 6 AF115 18 AP115 30 AU114 7 AF113 19 AQ114 31 AV119 8 AG114 20 AR115 32 AV117 9 AH113 21 AS120 33 AW118 10 A1114 22 AS118 34 AX119 11 AJ113 23 AS116 35 AX117 12 AKM14 24 AS114 36 AY118 iA7TAQ-¶4V&JT (' -'

Site Report Site Summary Site Name: OL7 Planner(s): Tristan M.Tritch Contaminant Summary NOTE: Surface soil DCGLw units are pClg.

Building surface DCGLw units are dpml1 00 cm2 .

Screening Contaminant Type DCGLw Value Used? Area (m') Area Factor Cs-I 37 Surface Soil 4.30 No 1 28.7 25 4.7 100 3.6 400 3 2,500 2.3 10,000 1 COMPASS v1.0.0 414/2005 Page 1 rAC*Mr-t 7-t

v: e '!,, .

Surface Soil Survey Plan Survey Plan Summary.

Site: 0L7 Planner(s): Tristan M. Tritch Survey Unit Name: 0L7-1 Comments: 0L7 western survey unit Area (M2 ): 6,200 Q.412.O S.i) Classification: 2 Selected Test: Sign - Estimated Sigma (pCi/g): 0.2653 DCGL (pCig): 4.30 Sample Size (N): 11 LBGR (pCi/g): 3.6 Estimated Conc. (pCi/g): 0.3 Alpha: 0.050 Estimated Power I Beta: 0.100 Prospective Power Curve I

0-0.8 P>.

0.7 r- 0.6 p-0.5 QI 0.4 r-03 02 0.1 0

0.0 0.5 1.0 1.5 2.0 26 3.0 3S 4.0 4.5 Soil Cocenfrtion pCi/g), including bckground

- Power - DCGL - - Estimated Power

- LBGR M 1-beta COMPASS v1.0.0 414/2005 Page 1 ATT-Ac"MlT 7-2

Surface Soil Survey Plan Contaminant Summary DCGLw Inferred Modified DCGLw Scan MDC Contaminant (pC11g) Contaminant Ratio (pCi/g) (pCItg)

Cs-137 4.30 N/A NMA N/A N/A Survey Unit Estimate Reference Area Estimate (Mean i 1-Sigma) (Mean +/- 1-Sigma)

Contaminant (pCiIg) (pC11g)

Cs-137 0.3331 i 0.2653 0.28 +/- 0.39 COMPASS v1.O.0 4!412005 Page 2 7AI 0 7 7-s

Surface Soil Survey Plan Survey Plan Summary.

Site: 0L7 Planner(s): Tristan M. Tritch Survey Unit Name: 0L7-2 Comments: 0L7 southern survey unit Area (m 2 ): 4,200 (7c700 5o; I) Classification: 2 Selected Test Sign Estimated Sigma (pCi/g): 0.353 DCGL (pCig): 4.30 Sample Size (N): 11 LBGR (pCi/g): 3.3 Estimated Conc. (pClg): 0.6 Alpha: 0.050 Estimated Power 1 Beta: 0.100 Prospective Power Curve W. Os I A.

0.8 -

P- 0.7 '

0.6 I Zr. 0.5 .t C

O'I e- 03 t ig 0.2 I V

4 0.1 t 0o 0s 1.0 1.5 2.0 2S 3.0 3.5 4.0 4.5 5.0 Soil Concentralion CiMg), ncluding backgrnud

- Pc )wer - DCGL - - Estimated Power

-U3 GR a 1-beta 4/4)2005 Page 1 v1..O COMPASS v1.0n0 414/2005 Page I

1. 7&REJfY 7-7-4

Surface Soil Survey Plan Contaminant Summary DCGLw Inferred Modified DCGLw Scan MDC Contaminant (pCIg) Contaminant Ratio (pCIg) (pC1g)

Cs-1 37 4.30 N/A N/A N/A NMA Survey Unit Estimate Reference Area Estimate (Mean +/- 1-Sigma) (Mean +/- 1-Sigma)

Contaminant (pCUg) (pCUg)

Cs-137 0.563 +/- 0.353 0.28 +/- 0.39 COMPASS Vl.0.0 4/412005 Page 2 ATTAC,4A/4V 7-'7*

,-:?- .

Surface Soil Survey Plan Survey Plan Summary, Site: 0L7 Planner(s): Tristan M. Tritch Survey Unit Name: 0L7-3 Comments: 0L7 northern and eastern survey unit Area (m2): 7,500 Classification: 2 Selected Test Sign Estimated Sigma (pCi/g): 0.2788 DCGL (pCVg): 4.30 Sample Size (N): 11 LBGR (pCilg): 3.5 Estimated Conc. (pCig): 0.3 Alpha: 0.050 Estimated Power I Beta: 0.100 Prospective Power Curve

.= I

_V. 0.9 . I I .t

_IC 0.8 t 0.7 F 0.6 I - -

Z 0.5

~0.4 . . I -- __

- -. - _ I

.S 0.3

. I I I--

S..

I =--=

ie 0.1 . l_

I 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 Soil Concenraiox (pCig), including background

- Power - DCGL - - Esthiated Power

- LBGR

• 1-beta COMPASS v1.0.0 41412005 Page I ATAWr1c~4FM 7-7-(o

Surface Soil Survey Plan Contaminant Summary DCGLw Inferred Modified DCGLw Scan MDC Contaminant (pCI/g) Contaminant Ratio (pCi/g) (pCUg)

Cs-137 4.30 N/A NIA N/A N/A Survey Unit Estimate Reference Area Estimate (Mean +/- 1-Sigma) (Mean + 1-Sigma)

Contaminant (pC11g) (pCi/g)

Cs-1 37 0.2632 +/- 0.2788 0.28 t 0.39 COMPASS vI.0.0 4/412005 Page 2 Axc$hff{/ -- 7

OL7-1 0L7-1 CONTINUED Cs-137 Cs-137 SR GRID DCvQ SR GRID pCVg 167 AM125-1 0.39 UNK AL125-2 0.6 AM125-2 0.45 UNK AL125-3 0.13 AM126-1I 0.27 UNK AL125-4 0.12 AM126-2 0.99 UNK AL125-5 0.1 AP129-1 0.17 UNK AL126 0.89 AP129-2 0.17 UNK AM125-1 0.39 AR119-1 0.13 UNK AM125-2 0.45 ARI19-2 0.16 UNK AM125-3 0.5 AR120-1 0.17 UNK AM125-1 0.8 AR120-2 0.15 UNK AM125-2 0.4 171 AL121-1 0.13 UNK AM125-3 0.55 AL121-2 0.13 UNK AM125-4 0.33 AL125-1 0.16 UNK AM125-5 0.35 AL125-2 0.15 UNK AM126-1 0.27 AL126-1 0.16 UNK AM126-2 0.99 AL126-2 0.78 UNK AM131 0.2 AM121-1 0.2 UNK A0131 0.08 AM121-2 0.17 UNK AP130-1 0.26 AM127 0.7 UNK AP130-2 0.1 AN121-1 0.13 UNK AP130-1 0.07 AN121-2 0.2 UNK AP130-2 0.09 A0121-1 0.17 UNK AP134 0.12 A0121-2 0.35 UNK AP135 0.16 UNK AL125 0.86 UNK AL125-1 0.7 TOTAL 15.99 MAX 0.99 MIN 0.07 MEDIAN 0.2000 AVG 0.3331 STD DEV 0.2653

<MDA UNK = UNKNOWN A7171~~7 g- I

0L7-2 0L7-3 Cs-137 Cs-1 37 SR GRID pCIq SR GRID pCig 129 AB122-1 0.5 111 AX118-Ll 0.2 AB122-2 0.9 AXI18-L2 0.09 AC122-1 1.5

• 167 AC116-1 0.43 AC122-2 0.6 ACI16-2 0.78 AC123-1 0.6 AE114-1 0.19 AC123-2 0.45 AE114-2 0.13 AC124-1 0.5 AT116-1 0.16 AC124-2 0.46 ATI16-2 0.18 AC125-1 0.6 AT117-1 0.16 AC125-2 1.01 ATI17-2 0.21 130 AG131-1 0.16 ATI18-1 0.18 AG131-2 1.1 AT118-2 0.08 167 AC117-1 0.45 AT119-1 0.12 AC117-2 0.6 AT119-2 0.27 AC118-1 0.74 169 ACI15-1 0.18 AC118-2 0.63 AC115-2 0.16 169 AE131-1 0.17 AD114-1 0.14 AE131-2 1.1 ADI14-2 0.16 AF132-1 0.27 171 AB116-1 0.14 AF132-2 1.2 AB1I6-2 0.11 AG133-1 0.13 AD1I15-1 0.06 AG133-2 0.46 AD115-2 0.17 AH134-1 0.64 AD116-1 0.9 AH134-2 0.45 AD116-2 1.2 171 AB117-1 0.13 UNK AY119 0.18 AB117-2 0.19 AB118-1 0.52 AB118-2 0.37 ABi19-1 0.92 AB119-2 0.82

.AC119-1_ 0.19 AC119-2 0.09 UNK AD128 0.13 TOTAL 18.58 TOTAL 6.58 MAX 1.5 MAX 1.2 MIN 0.09 MIN 0.06 MEDIAN 0.5000 MEDIAN 0.1700 AVG 0.5630 AVG 0.2632 STD DEV 0.3530 STD DEV 0.2788

.L:MDAK ' <MDA UNK = UNKNOWN UNK- UNKNOWN AVaMtN 8- z

=1 , ,

SM I;

l-0.4i~ B v Exhibit I Survey Unit Inspection

.; SECTION 1-SURVEY UNIT INSPECTION DESCRIPTION -'..-

Survey Unit #l OL7 X Survey Unit Location Stack Release Area (SS" Date 4/13/05 l Time l 1145 l Inspection Team Members R. Shepherd, K Lane SECTION 2 - SURVEY UNIT INSPECTION SCOPE Inspection Requiremrents (Check the appropriate Yes/No answer.) Yes No N/A

1. Have sufficient surveys (i.e.. post remediation, characterization, etc.) been obtained for the survey unit? X

2. Do the surveys (from Question 1) demonstrate that the survey unit will most likely pass the FSS? X

3. Is the physical work (I.e., remediatlon & housekeeping) in or around the survey unit complete? X

4. Have all tools, non-permanent equipment, and material not needed to perform the FSS been removed? X

5. Are the survey surfaces relatively free of loose debris (I.e., dirt, concrete dust, metal filings, etc.)? X

6. Are the survey surfaces relatively free of liquids (.e.. water, moisture, oil. etc.)? X

7. Are the survey surfaces free of all paint, which has the potential to shield radiation? X B. Have the Surface Measurement Test Areas (SMTA) been established? (Refer to Exhibit 2 for Instructions.) X

9. Have the Surface Measurement Test Areas (SMTA) data been collected? (Refer to Exhibit 2 for Instructions.) X

10. Are the survey surfaces easily accessible? (No scaffolding, high reach, etc. Is needed to perform the FSS) X

11. Is lighUng adequate to perform the FSS? X

12. Is the area Industrially safe to perform the FSS? (Evaluate potential fall & trip hazards, confined spaces, etc.) X

13. Have photographs been taken showing the overall condition of the area? X

14. Have all unsatisfactory conditions been resolved? X NOTE: If a No answer Is obtained above, the Inspector should Immediately correct the problem or Initiate corrective actions through the responsible site department, as applicable. Document actions taken and/oriustifications in the Comments section below. Attach additional sheets as necessary.

Comments:

Response to Question 3:

Intermodal shipping container is located within survey unit. Notified L. Shamenek.

Response to Question 4:

Miscellaneous building materials are stored thorough the survey unit. Notified L Shamenek.

Response to Question 5:

Roadway/concrete surfaces need to be cleaned off prior to FSS (as deemed by survey designer). Notified L Shamenek.

Response to Question 10/11:

A manhole located in grid AG-131 and storm drains in grids AN-134 and AO-131 may require access for FSS. Notified L. Shamenek Survey Unit Inspector (print/sign) I Ray Shepherd/ d-4-/Kevin Lane/// I Date l lL 4/13105 Survey Designer (print/sign) lTr- so.n lm -rv-A4 /jJA-,.y (5.)l Date l/1/4/'O 7

ATTAct¶M r-w 9-f

APPENDIX B COMPASS DQA Surface Soil Report OL7-1

DQA Surface Soil Report Assessment Summary Site: 0L7 Planner(s): Tristan M. Tritch Survey Unit Name: 0L7-1 Report Number 1 Survey Unit Samples: 11 Reference Area Samples: 0 Test Performed: Sign Test Result: Not Performed Judgmental Samples: 0 EMC Result: . Not Performed Assessment

Conclusion:

Reject Null Hypothesis (Survey Unit PASSES)

Retrospective Power Curve

- 1

" 0.9 .1* --.

= 0.8 .41 --

r 0.7 .11I -- __ --

't 0.6 II ___

• • Os 05 It

~ 0.4 It __

, 0.3 ii __

• It v 0.2 Jj ____

0.

iI -- ___ -- --

0.0 0. 1.0 1t5 2.0 25 3.0 3.5 4.0 4.5 Soil Concentration CiMg), including background

-. - Prospective Power

• 1-beta - ,- Actual Power

- LBGR - - Estimated Power

- DCGL --- Retrospective Power vl.0.0 7)812005 Page 1 COMPASS vt.0.0 COMPASS 712005 Page I

DQA Surface Soil Report Survey Unit Data NOTE: Type = 'S" indicates survey unit sample.

Type = 'R' indicates reference area sample.

Sample Number Type Cs- 137 (pCitg)

AO134SP1 S 0.09 AP132SP2 S 0.06 AP130SP3 S 0.15 AL130SP4 S 0.18 AL127SP5 S 0.19 AL125SP6 S 0.09 AK124SP7 S 0.05 AK122SP8 S 0.1 ALI12SP9 S 0.12 AP121SPI0 S 0.12 AR120SP11 S 0.13 Basic Statistical Quantities Summary Statistic Survey Unit Background DQO Results Sample Number 11 N/A N=1 1 Mean (pCVg) 0.12 N/A 0.33 Median (pCUg) 0.12 NtA N/A Std Dev (pCVg) 0.04 N/A 0.2653 High Value (pC/g) 0.19 N/A N/A Low Value (pCVg) 0.05 N/A N/A COMPASS v1.0.0 78/82005 Page 2

APPENDIX C COMPASS DQA Surface Soil Report OL7-2

DQA Surface Soil Report Assessment Summary Site: 0L7 Planner(s): Tristan M. Tritch Survey Unit Name: 0L7-2 Report Number: 1 Survey Unit Samples: 11 Reference Area Samples: 0 Test Performed: Sign Test Result: Not Performed Judgmental Samples: O EMC Result: Not Performed Assessment

Conclusion:

Reject Null Hypothesis (Survey Unit PASSES)

Retrospective Power Curve 1

0s .

• I I 'I C

. ~~

I___l ~ ~ ~ _ v A_-

1

._r-02 0.7 0.6

. IIT I!

Cr.  : .5. . -___ II =

o0

'S 0.4

r 0.3 5

0.2 -.-.i :_I -__ __I

_ ___ I _ _

0.1 0

0 1 2 3 4 5 Soil Concenftiox Cifg), including background

-. - Prospective Power

• 1-beta - - Actual Power

- LBGR - - Estinated Power

- DCGL --- Retrospective Power COMPASS v1.0.0 VW82005 Page I

DQA Surface Soil Report Survey Unit Data NOTE: Type = S Indicates survey unt sample.

Type = 'R" indicates reference area sample.

Sample Number Type Cs-137 (pCI~g)

AK135SP1 S 0.09 AK134SP2 S 0.09 A1133SP3 S 0.23 AH134SP4 S 0.17 AG133SP5 S 0.12 AG131SP6 S 0.21 AE129SP7 S 0.1 AD130SP8 S 0.38 AD128SP9 S 0.17 AB122SP10 S 0.21 AB120SP11 S 0.21 Basic Statistical Quantities Summary Statistic Survey Unit Background DQO Results Sample Number 11 N/A N=I 1 Mean (pClg) 0.18 N/A 0.56 Median (pCig) 0.17 N/A N/A Std Dev (pCig) 0.08 NIA 0.353 High Value (pCUg) 0.38 NIA NIA Low Value (pCig) 0.09 N/A N/A COMPASS v1.0.0 7/=/065 Page 2

APPENDIX D COMPASS DQA Surface Soil Report OL7-3

DQA Surface Soil Report Assessment Summary Site: OL7 Planner(s): Tristan M. Tritch Survey Unit Name: 0L7-3 Report Number 1 Survey Unit Samples: 11 Reference Area Samples: 0 Test Performed: Sign Test Result Not Performed Judgmental Samples: 0 EMC Result: Not Performed Assessment

Conclusion:

Reject Null Hypothesis (Survey Unit PASSES)

Retrospective Power Curve

.7.3- --- - - -

1. .son 4i - ______

= 0.8 .j]Z -__ __

41-4.-----

"0.7 I t.

i 0.6 .11-----

.7---- -

c 02 -- __ - ---- i -

.1.1--- - ____ ____ I _

a:

A 0.1

+1- ___ ___ - -

0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 Soil Concenmtfion MCifg), incluaing backgrund

-. - Prospective Power

• 1-beta -m y- Actual Power

- LBGR - Estiated Power

- DCGL --- Retrospective Power 71812005 Page 1 COMPASS vl.0.0 COMPASS v1.0.0 71/82005 Page I

J DQA Surface Soil Report Survey Unit Data NOTE: Type = S indicates survey unit sample.

Type = R' indicates reference area sample.

Sample Number Type Cs-137 (pCUg)

AC116SPI S 0.36 AE115SP2 S 0.1 AG113SP3 S 0.13 AL113SP4 S 0.08 AO1 15SP5 S 0.13 ATI20SP6 S 0.14 ATI18SP7 S 0.14 AT115SP8 S 0.1 AV119SP9 S 0.17 AV116SPI S 0.15 AX118SP1I S 0.14 Basic Statistical Quantities Summary Statistic Survey Unit Background DCO Results Sample Number 11 NUA N=11 Mean (pClg) 0.15 N/A 0.26 Median (pCUg) 0.14 N/A N/A Std Dev (pClg) 0.07 N/A 0.2788 High Value (pCig) 0.36 N/A N/A Low Value (pCUg) 0.08 N/A N/A 71812005 Page 2 COMPASS vl.0.0 COMPASS v1.0.0 7182005 Page 2