ML052140053

Rev 0 to Calculation E900-05-014, Snec Plant Area Open Land - OL1 - Survey Design, Appendix a to Final Status Survey Report for Saxton Nuclear Experimental Corp Open Land Area OL1.

ML052140053
Person / Time
Site:	Saxton File:GPU Nuclear icon.png
Issue date:	05/10/2005
From:	Cooper W FirstEnergy Corp
To:	Office of Nuclear Reactor Regulation
References
E900-05-014, Rev 0
Download: ML052140053 (90)

Text

Appendix A Open Land Survey Design

ORIGINAL SNEC CALCULATION COVER SHEET CALCULATION DESCRIPTION Calculation Number Revision Number Effective Date Page Number E900-05-014 o / I//t of 11 Subject SNEC Plant Area Open Land - OLI - Survey Design Question 1 - Is this calculation defined as in QA Scope? Refer to definition 3.5. Yes 0 'No D Question 2 - Is this calculation defined as a 'Design Calculation'? Refer to definitions 3.2 and 3.3. Yes 0 No El NOTES: If a 'Yes' answer Isobtained 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 Originatoes immediate supervisor should not review the calculation as the Technical Reviewer.

DESCRIPTION OF REVISION APPROVAL SIGNATURES:

Calculation Originator W. J. Cooper CHP Date Technical Reviewer R. Holmes/ Date Additional Review A. Paynterd Date 2,0jAu1Lf Additional Review Date

SNEC CALCULATION SHEET Calculation Number Revision Number Page Number E900-05-014 0 Page 2 of 11 Subject SNEC plant area open land - OL1 - Survey Design 1.0 PURPOSE 1.1 The purpose of this calculation is to develop a survey design for the Saxton Nuclear Experimental Corporation OL1 SNEC and SSGS open land" areas that are located in the original SNEC facility site and the site of the Saxton Steam Generating Station (SSGS). The area (OLI) is approximately 11600ssquaremeters, including the 1018 square meters in the existing east yard tank excavation. The area is a Class 1 survey area. Because the survey area exceeds the 2000 square meter limitation in Table 5-5 of the SNEC LTP (Reference 3.5) for maximum class 1 open land survey unit area, this survey area is subdivided into multiple survey units.

1.2 Multiple survey units of exposed concrete or macadam: MA8, DB1, PF1, and DB5 will be covered in a separate survey design (E900-05-015). This includes small concrete pads and monoliths, macadam driveways and parking areas, and the remaining pad footprint from the DSF building.

1.3 The OL1-8 area, which consists of the northern portion of the SSGS area is also not included in this design and will be covered by design E900-05-025. About one-third of OL1-8 is covered with a 'PRI pile'. This area is expected to contain both soil/rubble backfill and some residual concrete surfaces. Since layout of this area cannot be completed until the PRI pile is removed, a separate design will be used for the SSGS portion of OL1.

1.4 The Yard Storage Tank Excavation OL1-7 is covered in a separate design (E900-05-012).

1.5 This survey design includes five survey units:

1.5.1 OL1-9, consisting of the 1290 square meter area around and including the CV footprint between the SSGS footprint and the east yard excavation (Attachment 1-3).

1.5.1.1 This area has some exposed concrete NW of the CV.

1.5.1.2A driveway/parking area west of the CV (145 i 2) has a thin (about 4 to 6 inches) soil cover. The soil will be surveyed under this design, then removed to expose the pavement, which will then be separately surveyed under design E900-05-015.

1.5.1.3 A porti6n of OL1 in this vicinity is inside the switchyard (e.g. grid AZ131 and portions of others) and will be surveyed with the switchyard under another design.

1.5.1.4 There is a large 'PRI pile' in the CV area that must be removed prior to survey, so that the as-left soil surface at the CV area can be surveyed as part of OL1-9.

1.5.2 OLl-10 which consists of about 1200 square meters of the SNEC yard (RWST, RWDF, east yard excavation). This area must be surveyed after the east yard excavation is backfilled (Attachment 1-4) so that the as-left soil surface is surveyed.

1.5.3 OLI-1I the barrel bunker area about 1200 square meters (Attachment 1-5).

1.5.4 OL1-12, the line shack surrounding area of about 1575 square meters (Attachment 1-6) not including the line shack itself, which was previously surveyed.

1.5.4.1 Portions of this survey unit are gravel road.

A s SNEC CALCULATION SHEET Calculation Number Revision Number Page Number E900-05-014 l0 Page 3 of 11 Subject SNEC plant area open land - OL1 - Survey Design 1.5.4.2 There are a number of small concrete or macadam ramps and sidewalks around the line shack. These paved surfaces will be separately surveyed under design E900-05-015.

1.5.5 OL1-13, an odd shaped perimeter of soil of approximately 1480 square meters around the barrel bunker area and the DSB slab and pavement (Attachment 1-7).

1.6 The general layout of these survey units is shown in Attachment 1-1.

1.7 Fences in and/or bordering the area will be surveyed using a separate design E900-05-023.

2.0

SUMMARY

OF RESULTS The following information should be used to develop a survey request for this survey unit. The effective DCGLw value is listed below. The US NRC has reviewed and concurred with the methodology used to derive these values. See Attachment 2-1 to 2-4. These are copied from Reference 3.10 which was previously approved.

Table 1, DCGLw Values l volumetriccDcGLw-(pC/g-Cs-137) l 1 5.73 (4.3 A.L.)

NOTE: AL. is the site Administrative Limit (75% of effective DCGLw) 2.1 Survey Design 2.1.1 Scanning of soil (and fill materials) shall be performed using a 2" D by 2" L Nal detector with a Cs-137 window setting (Reference 3.1). The window will straddle the Cs-137 662 keV full energy peak width (see typical calibration information on Attachment 3-1).

2.1.2 The instrument conversion factor/efficiency shall not be less than that assumed on Attachment 4-1 as 205.6 cpmluRth - 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 must demonstrate detection efficiencies at or above the value listed in Section 2.1.2 above.

Table 2, Soil Scanning Parameters M)Cscan (pCllg) - Cs-13r Scan Speed (crnsec) Maximum Distance from Surface Action Level  % Coverage 6.2 25 4- (gap between detector face & soil surface) > 175 ncpm 100%

See Attachment 4 2.1.4 The action level specified is based on the MDCscan at a 300 cpm background. This is adequate since the MDCscan is expected to be less than the DCGLw times the area factor. Typical observed backgrounds are about 100 to 200 cpm (Attachment 8-3).

2.1.5 If a net count rate greater than the action level of Table 2 is encountered during the scanning process, the surveyor should stop and locate the boundary of the elevated

-_ . SNEC-CALCULATION SHEET Calculation Number Revision Number Page Number E900-05-014 0 l Page 4 of 11 Subject SNEC plant area open land - OLI - Survey Design area. The surveyor should then mark the elevated area with stakes or other appropriate marking methods. Continue the scan survey. Sample the elevated areas(s) IAW SNEC procedure E900-IMP-4520.04 (Reference 3.2), and Section 2.2 of this document following evaluation and investigation survey planning.

2.1.5.1 Class 1 soil should be scanned using a serpentine pattern that is -0.5 meters wide.

2.1.5.2 This is a class 1 survey area. All accessible surfaces are required to be 100%

scanned.

2.1.5.3 There is a large pile of 'PRI' soil in the south-central portion of OL1-9 on the CV cap. This pile should be removed prior to completion of the survey, so that the soils under the pile are subjected to the survey requirements of this design. No residual concrete surfaces are expected to be exposed by removal of this PRI pile.

2.1.5.4 The CV soil pile is an established PRI area, and was previously 100% scan surveyed and sampled during an automated conveyor measurement campaign in the summer of 2003 as SR186 and 190 (References 3.15 and 3.16). The results of this survey indicate that the soil pile meets LTP residual activity release requirements and the thoroughness of the survey is adequate to meet FSS measurement needs. One hundred and fifty-seven composite samples were collected of the scanned soil, all of which are less than 25 percent of the AL in this design. Additionally, the automated scanning (see Reference 3.17 for data on a previous scanning campaign) typically achieved an alarm setpoint less than 70% of the AL and detection limits substantially below the alarm setpoints. This soil pile is expected to be used as backfill elsewhere around the plant.

2.1.5.5 Areas that cannot be accessed should be clearly noted along with the reason for not completing the scan in that area.

2.1.6 The minimum number of soil sampling points indicated by the COMPASS computer program (Reference 3.3) is 11 for each of the survey units (see COMPASS output on Attachment 7-4 to 7-8). However, the number of samples is increased to 16 in OLl-13 to provide a more widely distributed layout of sample points in the unusual shape.

2.1.6.1 Sampling depth should be LAW Section 2.2.

2.1.6.2 The MDCscan (soil) exceeds the effective administrative DCGLw for Cs137 (6.2 pCi/g MDCscan @300cpm bkg > 4.3 pCi/g AL) but given the area factor for the assumed 1 meter squared elevated area (AF 28.7) and for the effective sample area (AF > 3), the scan MDC meets MARSSIM requirements.

2.1.7 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

. SNEC CALCULATION SHEET Calculation Number Revision Number . Page Number E900-05-014 I 0 Page 5 of 11 Subject SNEC plant area open land - OL1 - Survey Design 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 (see Attachment 6-3 to 6-12 for VSP sampling point locations) 2.1.8 The starting points for physically locating sample sites in the survey unit are based on measurements from site grid pins or other evident markers (see diagrams on Attachment 6-3, 6-5, 6-7, 6-9, and 6-11). Soil sampling points are positioned using coordinates developed from these markers and listed on Attachments 6-4, 6-6, 6-8, 6-10, and 6-12.

2.1.9 Because of the proximity to the RWDF and drum bunker, a biased sample location (BP-01) is placed in OLl-12 west of the line shack between the line shack wall and the fence.

2.1.10 Because of the potential for residual activity transfer through vehicle movement and post-shutdown topfill on the gravel, two biased samples locations (BP-02 and BP-03) are defined in the gravel areas north and south of the line shack in OL-12. See note below for sampling process for gravel areas.

2.1.11 A portion of the area of OL1--9 has a layer of old pavement underneath of a thin (4-6 inch) layer of soils. This area is indicated by the darker color on Attachment 6-3. The soil sample in this area should only be collected from the soils on top of the pavement. Cutting down through the pavement to obtain a deeper sample is not required. The soil will be removed after FSS of the soil so that the pavement can be separately surveyed under design E900-05-015.

2.1.12 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.

2.1.13 When an obstruction is encountered that will not allow collection of a sample, contact the cognizant SR coordinatorforpermission 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 the biased and random fixed points and any elevated areas(s) IAW SNEC procedure E900-IMP-4520.04 (Reference 3.2) and the following.

e< SNEC CALCULATION SHEET Calculation Number Revision Number Page Number E900-05-014 0 Page 6 of 11 Subject SNEC plant area open land - OLI - Survey Design 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 1 meter deep core. Section 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. Sampling due to an instrument alarm condition should also be of the entire 1 meter of soil/material.

The gravel samples in OLI-12 (including the two biased samples BP-02 and BP-03) should be sampled by collecting two well mixed samples of the layers, one of the gravel overburden layer, and a second of the underlying soil down to a total of 1 meter in depth.

This same process should be used whenever a random point lies on a gravel road or gravel parking area.

For the fixed point soil sample in OLI -9 over the pavement (FP-1 1), only the soil layer on top of the pavement is to be sampled under this design.

2.2.1 Clearly mark, identify and document all sample locations.

2.2.2 Sample any location that is above the action level cited if Table 2 based on specific investigation plan. A 2.2.3 Maintain chain-of custody requirements on all design fixed point and action level samples (Reference 3.14).

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", 817103.

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 SNEC survey Nal measurements in OL1 & OL2 3/8/05 3.8 GPU Nuclear, SNEC Facility, 'Site Area Grid Map", SNECRM-020, Sheet 1, Rev 4, 1/18/05.

3.9 SNEC Calculation No. E900-03-012, Effective DCGL Worksheet Verification.

3.10 SNEC Calculation No. E900-04-005 "CV Yard Survey Design - North West Side of CV" 3.11 SNEC Procedure E900-IMP-4520.06, 'Survey Unit Inspection in Support of FSS Design".

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

3.13 Microsoft Excel 97, Microsoft Corporation Inc., SR-1 and SR-2, 1985-1997.

r- SNEC CALCULATION SHEET Calculation Number Revision Number Page Number E900-05-014 I 0 1 Page 7 of 11 Subject SNEC plant area open land - OL1 - Survey Design 3.14 SNEC Procedure E900-ADM-4500.39 "Chain of Custody for Samples" 3.15 SNEC survey SR0186 3.16 SNEC survey SR0190 3.17 "Final Report for Survey of Debris Pile-, Revision 3 1/4/05 Shonka Research Associates 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 Scoping and post-remediation soil samples from this area are used as the initial estimate of variability. These results are shown on Attachment 8-1 and 8-2. The grid locations where these samples were taken are shown on Attachment 1-1.

4.3 The MARSSIM Sign Test (Reference 3.12) will be applicable for this survey design. No background subtraction will be performed under this criteria during the DQA phase. Normal environmental background of Cs1 37 will (conservatively) not be subtracted.

4.4 The required number of fixed survey points as determined by COMPASS are then located on the survey map for the survey unit by the Visual Sample Plan (VSP) computer code (Reference 3.4).

4.5 Reference 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 ranges from about 100 cpm to about 200 cpm (Reference 3.7). See Attachment 8-3.

4.7 The determination of the physical extent of this area is based on the drawing Reference 3.8 and numerous walkdowns and measurements.

4.8 Remediation History: OL1 is an open land area. Portions contained the original SNEC site facility and the Saxton Steam Generating Station. Extensive remediation has occurred in the survey area.

4.8.1 The SNEC Radwaste building (RWDF), Control and Auxiliary (C&A) building, Containment Vessel (CV), the SSGS, various buried pipe tunnels and underground tanks were all extensively remediated by removal, various decon methods and extensive concrete removal. The buildings were then demolished to grade or below.

The residual building portions have been previously surveyed and the release surveys have been accepted.

4.8.2 Extensive soil remediation (removal) was performed.

4.8.3 The SSGS was backfilled when it was permanently shut down. Subsequently, activity was found using core bores. The SSGS backfill was removed and surveyed through an automated conveyor system. Additional concrete surfaces in the SSGS basement were remediated and then the scanned backfill was replaced.

4.8.4 The underground tank excavation was backfilled after the tanks were removed early in the project. This backfill was removed. Portions were disposed of as radioactive

-. ISNEC CALCULATION SHEET Calculation Number Revision Number Page Number E900-05-014 0 Page 8 of 11 Subject SNEC plant area open land - OLI - Survey Design waste, while the remainder was scanned using a automated conveyor scanning system and is currently stored for re-use.

4.8.5 The barrel bunker was removed to below grade.

4.8.6 Underground drainage and sewerage systems have been removed.

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-1 37 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 used to determine the effective radionuclide mix for the OL1 area has been drawn from samples that were assayed at off-site laboratories. This list is shown on Attachment 2-1 through 2-3, and includes twenty-one analysis results. Review of the data shows several radionuclides were not positively identified at any significant concentration.

These radionuclides have been removed from the data set and are not considered further as any minor contribution is accounted for by the administrative reduction of the surrogate DCGLw to 75% of the surrogate DCGLw based on the identified nuclide ratios.

Radionuclides remaining include H-3, Co-60, Sr-90, and Cs-137. Additionally, the data shows Cs-137 to be the predominant radioactive contaminant (based on activity) found in the area.

4.11 The decayed set of sample results were input to the spreadsheet titled "Effective DCGL Calculator for Cs-1 37" (Reference 3.9) to determine the effective volumetric DCGLw values for the OL1 area. The output of this spreadsheet is shown on Attachment 2-4. This data is copied from Reference 3.10.

4.12 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-137. Additionally, the detection system incorporates a Cs-137 window that lowers sensitivity to background in the survey unit. The resulting range of background values varies from about 100 to 200 cpm (Attachment 8-3).

4.13 The survey unit described in this survey design was inspected after remediation efforts were shown effective. A copy of the OL1 specific portion of the SNEC facility post-remediation inspection report (Reference 3.11) is included as Attachment 9-1.

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

4.15 The decision error for this survey design is 0.05 for the a value and 0.1 for the 3value.

4.16 "Special measurements' (as described in the SNEC LTP sec 5.5.3.4) are included in this survey design. Section 5.5.3.4.4 discusses re-fill materials. Portions of this survey will include areas that consist of crushed structural materials and backfill. These will be treated as soil for scanning and sampling.

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

E n SNEC CALCULATION SHEET Calculation Number Revision Number Page Number E900-0514 I 0 l Page 9 of 11 Subject SNEC plant area open land - OLI - Survey Design 4.18 SNEC site radionuclides and their individual DCGLw values are listed on Exhibit I of this calculation based on Table 5-1 of Reference 3.5.

4.19 The survey design checklist is listed in Exhibit 2.

4.20 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 (Reference 3.13) spreadsheet.

6.0 APPENDICES 6.1 Attachment 1-1, is a diagram of survey unit OL1. Attachment 1-3 through 1-7 are the grid layouts for the five OL1 open land survey units included in this design.

6.2 Attachment 2-1 to 2-4 is the DCGLw calculation logic and sample results from the OLI and OL2 areas in addition to the DCGL calculation sheets (decayed to January 15, 2004).

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 a end-cylinder geometry.

6.6 Attachment 6-3 to 6-12, show the randomly picked scan locations (from VSP) and reference coordinates for the five OL1 open land survey units included in this design.

6.7 Attachment 7-1 is a COMPASS output showing the area factors used. Attachment 7-2 shows the variability used for all five survey units. Attachments 7-4 through 7-8, are the COMPASS output for the five OL1 open land survey units included in this design, showing the number of sampling points in the survey unit, area factors, and prospective power.

6.8 Attachment 8-1 and 8-2, is the soil variability results from selected recent soil samples from the OL1 area. Attachment 8-3 is the general area Nal detector backgrounds measured on 3/8105.

6.9 Attachment 9-1, is the results of the inspection report for the OL1 area.

at n SNEC CALCULATION SHEET Calculation Number Revision Number Page Number E900-05-014 I 0 { Page 10 of 11 Subject SNEC plant area open land - OL1 - Survey Design Exhibit I SNEC Facility Individual Radionuclide DCGL Values (a) 25 mremly Limit 4 mremly Goal 25 mremly Limit (All Pathways) (Drinking Water)

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

(dpmI100cm 2) (Surface & Subsurface) (Surface & Subsurface)

(pCug) (pCig)

Arn-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 mremly goal, only the DCGL values that constitute the 25 mremly regulatory limit will be controlled under this LTP and the NRC's approving license amendment (b) Listed values are from the subsurface model. These values are the most conservative values between the two models (i.e.,

surface & subsurface).

r_1 SNEC CALCULATION SHEET Calculation Number Revision Number Page Number E900-05-014 0 Page 11 of 11 Subject SNEC plant area open land - OL1 - Survey Design Exhibit 2 Survey Design Checklist Calculation No. l Location Codes E900-05-014 SNEC plant area open land - OLI - Survey Desn ITEM I REVIEW FOCUSStus Status Reviewer Rve& Date r R(Circle One) Initials I Has a survey design calculation number been assigned and is a survey design summary description provided? "

Are drawings/diagrams adequate for the subject area (drawings should have compass N/A 2r Adra ingsdiag ams dequ te~ headin gs)? \ . 0 3 Are boundaries properly identified and is the survey area classification clearly indicated? fes N/AWA 4 Has the survey area(s) been properly divided Into survey units IAW EXHIBIT 10 Is N/A 5 Are physical characteristics of the area/location or system documented? (

6 Is a remediation effectiveness discussion included? NIA 7 Have characterization survey andtor sampling results been converted to units that are N/A JI !od 5 comparable to applicable DCGL values? Ct 7 8 Is survey and/or sampling data that was used for determining survey unit variance included? iYes) N/A 9 Is a description of the background reference areas (or materials) and Iheir survey and/or Yes sampling results included along with a justification for their selection?

10 Are applicable survey and/or sampling data that was used to determine variability included? DiiN/A 11 Will the condition of the survey area have an impact on the survey design, and has the Yes, probable impact been considered in the design? D o S Has any special area characteristic including any additional residual radioactivity (not 12 previously noted during characterization) been identified along with its impact on survey Yes(G

______ ~~design? _ _ _ _ _

13 Are all necessary supporting calculations and/or site procedures referenced or Included? 6e NtA 14 Has an effective DCGLw been identified for the survey unit(s)? A 15 Was the appropriate DCGLEc included in the survey design calculation? Yes,/

16 Has the statistical tests that will be used to evaluate the data been identified?

17 Has an elevated measurement comparison been performed (Class 1 Area)? Yes,4N 7 q'A 18 Has the decision error levels been identified and are the necessary justifications provided? a WA 19 Has scan instrumentation been identified along with the assigned scanning methodology? e IA 20 Has the scan rate been identified, and is the MDCscan adequate for the survey design? Y N/A 21 Are special measurements e.g., In-situ gamma-ray spectroscopy required under this design. 4/ A and is the survey methodology, and evaluation methods described? \es,..

22 Is survey instrumentation calibration data included and are detection sensitivities adequate? NIA 23 Have the assigned sample and/or measurement locations been clearly identified on a diagram ~ N/A or CAD drawing of the survey area(s) along with their coordinates? ___?_EC?

24 Are investigation levels and administrative limits adequate, and are any associated actions i clearly indicated? As a 25 For sample analysis, have the required MDA values been determined.? Yes,(5 26 Has any special sampling methodology been identified other than provided in Reference 6.3? Yes, ()

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

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ATTACHMENT 1-7, E900-05-014

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-137 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 Omean 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 pCilg) - 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 DCGL,. Using the above data selection logic tables the calculated Cs-137 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).

Attachment 2-1 E900-05-014 1

TABLE I -Data Listing (pCl/g)

SIIEC S5mphNol Locaoion0'ecrlptin l -3 Sr.9O co-No Cs.137 Am.241 l Pu-238 Pu-239 Pu-241 C.14 111-3 Eu-152 t Cv Tunnel CVTunnelSediment Composite, OL1 9A.0E.0 9.I7E*08 1.2E+00 12 .03 1.80E.01 5.5OE.01 2.20E.01 WE.0 98.E.00 4.02E+00 130E401 2 SXSuSL9219 Subsuface Sampe 029n0'. AY.128. OLI 7.00E-02 5.90E41 3 sxs5I193 NorthCVYardSoilBA-127. 5120El, Sampie S, o02 4.5E.0 5.31E.02 192E402 itE41 9.hEt-2 4.6SE402 3.27E02 I3.77E.00 2.106.01 I1.09601 5.25E402 4 SXSL.1089 North CVYard SoilAY-127. 010El,SamPb 03, OL1 3.03E.00 6.95E4-2I 3.32E02 1.2SE+* 9.93E402 1.28E41 5.01E-024.97Eu002.10E4517,S4E-0 S.28-02 SXSL1II1S NorthCV oirdSoil AY.12.954 ,El Sample 2.O1 4.886E.0 5,36E.02 2.43-02 1.80.E00 2.40E-1 1.38E401 407E602 4.21E6002.10E461 71.00E- 5.71E.02 6 SX5L1122 NorthCVVardSoilAY.129, 70 El,Samplea 2,DLO 3.4E400 5.29E02 2.7#-02 4.77100 1ME,.1 8.94E402 4.0tEM2 3.68E60 2.06E41 875E.00 86E-02 7 SXSL1130 NorthCVYardSoilAX.129, s03'El.Sumple 4,DLO 4.99E+00 6.4-02 298-02 2, .01 1.49601 B.56E42 1.21FEE2 3 E55-0 2.31E-01 1.346.1 9.89E42 N I SXSL1132 Nornh CV Yord SoilAZ.130, SampleaS.DLO 2,98E0 I 7150E42 I 3-.5-02 [ 2.59L1u00 1.64E.1 7.46I42 6.46E-02 5.2?E00I 2.15E 4I 1.26E1 j 7.34E42 9 L SXSLt270 AX.12S, 3.3,Soil,CVSESides'FromCV,800El.,OL1 1.13E.01 2.0062 1.00E-02 2.316n01 I 3.70E-02I OE403 I 7.00E403I 210E00 3.3+00 1 S.61E100 I .E0-02 s FromCV,soo-El,DLO 1.15E+01 3.00E-02 436+00 3.10E402I 160E.02 I 7.-03 I 1,91.E00 4.OE+00 I 7.786+00 I 4.00E-42 7.00Eio2 I 9.7E803 I 1.33E02 I 1.10E-02I t17E40 I 1.83E.01I 1.75E.00 3,0-0E2 3.OOE-02 14 s 3.01DE42 6.00E.02 16 SXSL3i40 Son WestSide6I Death). OL1 I 1.20E-02 1s I SXSL3142 SoilPile,CVYard,ThoeeFeeton EastSide.SN.37, 01.1 I 17 SXSL3145 EastCVYard,SoilPile 3' onEastSide(6' D.pth),OLI 1.90E6- 1.70-E02 130E.02 1.26E6N0 4.NE43 5.NOE.03I 5.00E403I 3.76E601 I 8.30E-02 3,69E.0 I 3.8E4-02 37,OLI 2E97E02 .0E0-02 3,801 I I I 2.30E-02 I 3.08E01 I 3.00E-03I 5.01E403I 5.00E-03I 3.U4301 I 8,70E-02I 4.18E-0OI 5.10E402 22 23 SXS14149 CVY

_ __ _ _ __ __ __ __ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ TABLE 2 -Decoyed Listing I(pCugI _ _ _ _ _ _ _ _ _ _ _ _ _ I T1Q2 T 12 T112 T112 T12 T1(2 T12 T 1!2 T1Q2 T112 T1Q2 DeceaDate 10446.15I 1925.23275 11019.5925 T 157861.05 1 32050.6875 1 8813847.75 1 5259.61 2092882.5 1 36561.525 1 4967.4 S Sm mp 0l 0EC 1 _o

_t _

cvunnel CV1 I cvT 2 Xsss 4 SUbsUI .I I_ I_1 ]4.O E02 II I I I IflovnmberiiSt991 1520 NorthCVYard 912El.Sumpit:0,01.2 SoilBA.127. 4.20EeOO I 511ED0 1.M?I 1 . 5.s5EM

..1 . - I 005AED23

. A 83w03 I ...-

I_ -%7015 I 'N4155.4

.--. I s11.-

IM115 I. 4 F&5.,115 II I A MOM15

- I

.- , ". nn

-. I 457 North CVYardSoilAY.127. 610'El.Semple 03,OL1 2.78K+00 6.69642 I 2.71E-02 1246+00 I 9,91E.42 I t26E01 l S.002 1 4.61E-00 I 2J1E0601 I l.E-0 I 7165E-02 I June28,2002 l 566 NorthCVYard SoilAY.120,904 El,Sample 02,01. 4.47E-O NorthCVYardSoilAY.129, 79 El, Sample :2.01.1 3.156.-Oe 7 I SXSL1130 NorthCVYardSoi AX.129. 803El. SumaIe04.OL1 4.58E00 6 l SXSL1132 I Hor1CVY tL, aps*a # 2.73.00 9 SXSL1270 AX 129.5 3, Sol; S From CV,t00 El, OL1 9 )84.0 .IM4E.2 722E.03 2J1E+01 I 3.69E.02I 6.866E-3I 7.O8E.03 187E.00 I 3.836E0 I U t I 6.17E42 I July 25,2001 1 903 10 SX6L1281 AX 125,3-1,Sdl I it 6 From CV, 0WEl, OL 1.00E+01 2.83E-02 7.22E.03 414E*N I 3.09E2 T 1,57.02 I 7.86-43 I 1,69E0i 4100.0 I 7.65E+00 I 3.5302 I July 20,2801 i 903 11 SXSL28419 Amiuis O10SDepth, OLI 7.77E.02 I' 5.74E1 I 9.75E43 I 1.31E02 I 1.1SE4-02 I 1.71E-O I 1.83E01 I 1.73E60 February13,2002 1 701 13 SXSL2t71 CVArX2 Eat Y Aiddle,12 WayUp, OLI 14 SXSL872 CVAre EastYard om (also top center), OL is SXS1140 EastCV Yard Sdl Vest Side (6' Deathl. OL la SXSL342 SoilPb, CVY rd Ent Side,SR.37,OL1 2A5E.02 I 5.81E.O1I I ~ II I I I I Aluotst13, 2002 1520 17 I 0XSL3146 East CVYard, SoilPile @3 on East Sidefff- -. rthoL I 790515 I

I I US1I' l.rrn us 1 050J17 I.wcvL _ 1.22E-.0 I 3199E603 I 4.95E-03I 5.00E.03 I 3.52E.01 I 8,306.02 I 3.65E.-CO I 3,54E-02 I AuCuat3O.2002 I 503 to rJUp.w;I I t.lw SR.37, 0, OL1 2.876E2 .63E-02 2J.91*.11 I I I I I I I I Atiusut13,2002I 520 22 1 SXSL4143 23 [ SXSL4149 I CV KEY Yellow Shaded Back round = Positive Result Gray Shaded Background = rDA 2

TABLE 3 - Decayed Listing of Positive Nuclides & MDAs Removed (pCUg)

SNECSample No LocationlDescription H-3 Sr-90 Co-SO Cs-137 Total pCiIg I CV Tunnel CV Tunnel Sediment Composite, OL 9.01E+00 8.59E-41 1.17EF03 1178.89 2 SX9SL99219 Subsuface Sample #29 (0-6'), AY-128, 01. 5.36E-1 0.54 3 SXSL1063 North CV Yard Soil BA-127, 812 El, Sample 0 5, OL2 4.20E-e 00 8.55E-01 s.0o 4 SXSLI089 North CV Yard Soil AY-127, 810' El, Sample # 3, OL 2.78E+00 1.24E+00 4.02 S SXSLI111 North CV Yard Soil AY-128, 804' El, Sample 0 2, OLI 4.47E-00 1.74E+00 6.21 6 SXSL1122 North CV Yard Soil AY-129, 798' El, Sample 0 2, OLI 3.15E"O00 4.40E+0O 7.78 7 SXSL1130 North CV Yard Soil AX-129, 803' El, Sample 4, OLI 4.58E+00 2.44E.02 2.18E+01 26.42 8 SXSL1132 North CV Yard Soil AZ-130, Sample

• 5, OLI 2.73E+OO _ 2J0E+O0 5.23 9 SXSL1270 AX-129, 3-3, Soil, CV SESide 5' From CV, 600 El.,OL1 2.18E-01 21.82 10 SXSL1281 AX-128, 3-1, Soil, CV Tunnel East S From CV, 500' El,OLI _ 4.14E+00 4.14 11 SXSL2649 Anulus Well, A-2, S to 10' Depth, OL1 5.74E 01 0.57 13 SXSL2871 CV Area - East Yard Dirt Pile - Middle, 112Way Up, OL1 5.37E-1 0.54 14 SXSL2872 CV Area - East Yard Dirt Pile - sottom (also top center), OLI- 9.58E.02 0.10 15 SXSL3140 East CV Yard, Soil Pile @6' on West Side (S" Depth), OLI T. .O1 0.80 18 SXSL3142 Soil Pile, CV Yard, Three Feet on East Side. SR-37, OLI- 5.81E41 0.58 17 SXSL3145 East CV Yard, Soil Pile @ 3on East Side (6" Depth), OLI 1.22E4'O 1.22 18 SXSL3149 Soil Pile, CV Yard, Six Feet on East Side, SR-37,DLI. 2.90E411 0.29 I9 SXSL3163 East CV Yard, Soil Pile (MTop (68Depth), OLI 2.91E-O1 0.29 21 SXSL4142 CV Yard Soil - West Side, API-7, OLI 8.94E.01 0.89 22 SXSL4143 CV Yard Soil - West Side, API.7, OLI 4.97E.01 0.50 23 SXSL4149 CV Yard Soil - West Side, API-7. OLI I 6.74E402 3.87E+00 3.94 TABLE 4 - Ratio To Cs-137 for Positive Nucildes SNECSample No LocationlDescriptlon H-3 Sr-90 Co-60 Cs-137 Total I CV Tunnel CV Tunnel Sediment Composite, OLI 7.71E403 7.35E-04 1.00E-00 1.01 2 SX95L99219 Subsuface Sample 029 (0-5'), AY-128, OL1 1.OOE+00 1.o0 3 SXSL1063 North CV Yard Soil BA-127, 812 Ei,Sample 0 S, OL2 4.91E.00 1.QOE+00 s.91 4 SXSLI089 North CV Yard Soil AY-127, 810 El, Sample # 3, OL1 2.23E00 F 1.00E+00 3.23 6 SXSLI115 North CV Yard Soil AY-128, 804' El, Sample # 2, OLI 2.57E4-00 1I.00Ee00 3.57 6 SXSL1122 North CV Yard Soil AY-129, 798' El, Sample 0 2, OLI 6.85E41 1.0_0Ev0 1.68 7 SXSL1130 North CV Yard Soil AX-129, 803' El, Sample 0 4, OLI 2.10E401 1.12E-03 1.00E+00 1.21 8 SXSL1132 North CV Yard Soil AZ-130, Sample 0 5, OLI 1.09E+00 1.OOE+00 2.09 9 SXSLI270 AX-129, 3-3, Soil, CV SESide 5 From CV. 800' El., OLI _ 1.0E+00 1.00 10 SXSL1281 AX-128, 3-1, Soil, CV Tunnel East 5' From CV, 800 El, OLI 1.E+00 1.00 11 SXSL2649 Anulus Well, A-2, S to 10 Depth, OLI 1.OOE.00 1.00 13 SXSL2671 CV Area - East Yard OirtPle - Middle, I2 Way Up, OL1 _ _W _ 1.00 14 SXSL2872 CV Area - East Yard Dirt Pile - Bottom (also top center), OLI 1.00E00 1.00 15 SXSL3140 East CV Yard, Soil Pile Q06on West Side (6' Depth), OLI 1.OOE-'-00 1.00 16 SXSL3142 Soil Pile, CV Yard, Three Feet on East Side, SR-37, OLI 1.OOE+00 1.00 17 SXSL3145 East CV Yard, Soil Pile @ 3on East Side (6' Depth), OLI 0E+00 1.00 is I SXSL3149 Soil Pile, CV Yard, Six Feet on East Side, SR-37,OLI 1.00E+00 1.00 19 SX5L3153 East CV 1 ipth), DLI I _ _ _ _ _ .OOE400 1.OLO-700E.00 1.00 1.00 21 5X5L4142 CV Y*

22 SXSL4143 CV Y D,

Ll _ _ _ _ _ I _ _ __ _ _ _ _ _ _ _ 1.OOE+0 0 1.00 23 SXSL4149 CV Y D, LI Mean=

4 _ _ _

1.95E-00 I

7.71E-03 I

1.74E.02 6.42E.03 t.OOE-'00 1

1.02 2.96 Sigma= 1.708 1 [ 0.010 I 0.000 -:::I:;,::::.

.:::-?

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

3

Table 5 111IMMMAIRM 75%

Effective DCGL Calculator for Cs-137 (in pCi~g) l 16.98 IpCilg l 12.74 IpCiig I i

SAMPLE IIUMBER(s)=ICV YARD SOIL & BOULDER SAM.IPLES I 17.45% 25.0 mremiy TEDE Limit 1 5.73 IpCi!/ I 4.30 IpCilI 7.79% mm mremiy Orinkinn Wadter (DtW) IP Check for 25 Sample Input (pCilg, uCi, % 25 mremly TEDE This Sample l Isotope of Total, etc.) %of Total Limits (pCitg) 26 mromt TEDE r Column A or El Am-241 0 000% 9.9 Am-241 C-14 0 000% 2.0 C-14

.1 Co-60 0.0064 0.216% 3,5 Co-60 Cs-137 1.0000 33 738% 6.6 004 0401Xi0 00,00 Cs-137 Eu-152 0.000% 10.1 0 00 Eu-152 6

11-17 IIIl11,17 H-3 7 Ni.63 1.9499 65.786%

0 000%

132 747 I

OM H-3 Ni-63 8 Pu-238 0 000% 1.8 Pu-238 9 Pu-239 0 000% 1.6 o 00 1oo 0 00 Pu-239 1CPu.241 0.000% 86 oMo ll00 0 oo 0 00 Pu-241 I1I Sr-90 0.0077 0.260% 1.2 0-04 0.04 0.16 Sr-90 2.96E+00 I 100.000%1 16.98 38I 13 l 16.98 4.364 _U.31Z I Maximum Permissible Maximum l To Use This Information l pCitg Permissible pCitg Sample Input Units Must Be In (25 mrem@y) (4 mremly)l I cla not %of Total.

4 Co~g7

2350 INSIRUMENT AND PROBE EFFICIENCY CHART 7/01/04 (Typical 2" by 2" Nal (Cs-137 W) Conversion Factors)

Inst.# l Cal Due l APTr____ Probea l Cal Due cpm/mRih 9865 I5.8/5 I RK& Y 121 1680 Pk  !;'5I S0S 214.882 98647 18/05 IG&Y(i 2 1 1607 Pk !I 5/(10 2' S.187

_I 12923i 51 8,105 IP I &.Y.

_ __ _ I 221I1687 PI,

_ I _

'1 gi0-5 I 2S5 117573 I 5.iS/05 ()&Y l 21674Pk 2 l 5/18/05 .2I12.173 I _ I 1_._ i_ _ _ I _ I_ _ _

1 7566 4/9i/05- Ci&R l 185852 Pk 4/13/05 l 209.862 1261 83 11I/04 l &R l_ l_206280 Pk 12/12104 190,907 12942) I I'3-1104 Y&,W _______t2062831 Pk 10/31/04 j 177185

_ _ _ I _ _ I _ _ _ I _ _ _ I ._ _ _ I _ 1 l__

12 6 1981 I130(3/144 R&-w 1_960(2 1Pk I 5/25/05 I 209. 194 126172 6107/05 G&W l j 196022 l 6/07/05 208.302

. _ _ _ I _ _ _ I -_ _ 'I_ I __ _ i _ _ _ _

129440 4/09/05 lW ________ 10938 Pt, 4/14/05 2)5.603 0

120588I ______ I* I - 18584 Pk 60_ I 216_ I ___

120)588 6/08/05} 13& l_____ j 185844 Pl; I 6/09/05 j 216.6r54;

_ _ I _ _ I _ _ I __ I _ _ _ _ I __

9 7J i.1 0. _5()5 P& NW I02so8)6 6/281/0 5 1- 211.79 Q Attachment 3-1 E900-05-014

Nal Scan MDC Calculation MDCscan = 6.2 pCi / g b = background in counts per minute bi = background counts in observation interval Conv = Nal Detector I meter calibrated response in cpm/uR/hr d = Index of sensitivity from MARSSIM Table 6.5 based on 95% detection, 60% false positive HSd = Elevated measurement spot diameter in centimeters MDCscan = MinimumDetectable Concentration for scanning in pCi/g MDCRi = Minimum Detectable Count Rate in net counts per minute MDCRsurv = MDCRi adjusted for the human performance factor p - in net counts per minute MDER = Minimum Detectable Exposure Rate in uR / hr MSoutput = MicroShield derived exposure rate for I pCi/g contaminant in mR/hr O = Observation interval in seconds p = human performance adjustment factor- unitless SR = Scanning movement rate in centimeters per second DCGLeq = Net count rate equivalent to the Adjusted DCGL b= 300 cpm p= 0.5 HSd = 56 cm SR = 25 cm d= 1.38 Conv = l 205.6 lcpmluRlhr Msoutput = I1.37E-04 lmR/hr / pCi/g DCGL = 4.3 pCi/g HSd = 2.24 = Oi (sec) b*Oi = 11.2 = bi (counts)

SR 60 (sec/min) d*sart(bi)*60 = 123.7 = MDCRi (net counts per minute)

Oi MDCRi = 174.9 = MDCRsurv (net counts per minute) sqrt(p)

MDCRsurvevor = 0.851 = MDER (uR/hr)

Conv MDER = 6.21 = MDCscan pCilg MSoutput*1 000(uR/mR)

MDCsurv*DCGL = 121 = AL net cpm MDCscan Attachment 4-1 E900-05-014

MicroShield vi.115 (5.055-1101 21)

GPU Nucloar Page :1 Fie Rel:

DOS File  : MODELMSS Date:

/ Rim Date  : September 23. 200) Bhek B(in Tine : 2 43.26 Pl Checked Divation  : 00.00.02 Casa

Title:

Cs-1 37 Snil Descriptinn: Model for Scanning Geometry: n - Cylinder Volumo - End Shields Source Dimensions Height 15.24 cm 6.0 in y Radus 2B.0 cm 11.0in Dose Points 11C 4 ,

r., ; A - X I Y I Z 111 0cm 25.4 cm 0 cm

'...j 0.0in 100in 0.0in Shields Shield Name Dimension 1,atedalt Densitv z Souwce 3.75e404 cri Concrete 1.6 Ai Gap Ai 0.D0122 Source Input Grouping Method : Actual Photon Energies Ilucride ctzies becquerels I PCi/cmr Brcm' Ba-137m 5.6B15e000 2.1022ew0f3 1.5136e-006 5.6003e02 CsO137 6.0059e-009 22221e.003 1.6000e-006 5.9200e-002 0 Buildup The material reference Is: Source CD Integration Parameters 301 Radial 50 Cicturdeiential 50 Y Direction (axdal 50 m

CD Rnsultls Fkuence Rate Fluence Rate Expostue Rate Expostoe Rate 0 Eneg

• Activity I MeV/c'/tec MeV/crrd/sec mRA1r mR/hi 0 lieV photons/sec ftIo Buildup With Btaldup No Buidup With Buildup 0 O0310 4.352es01 7.617e-06 9.220e-06 6.345e 08 7.600e-01 01 0 00322 80 30et01 1.465e-05 1.704e-05 1.179e*07 1.436e-07

,N 0.0364 2.922e.01 0.11Be'06 1.060e-05 4.613e-08 6.024e-08 06616 1.892etO3 7.060e-02 1.260e*01 1.369e04 2.443e-04 TOTALS: 2045e+03 7.063e.02 1.261e-01 1.371e-04 2.446e-04

LEFT INTENTIONALLY BLANK Attachment 6-1 E900-05-014

LEFT INTENTIONALLY BLANK Attachment 6-2 E900-05-014

OL1-9 Open Land CV Area N

Origin Pin AX131 Attachment 6-3 E900-05-014

OL1-9 Fixed point Dimensions in METERS X Coord Y Coord Label Grid Type East North 20.63 3.52 FP-1 AX129 Systematic 0.6 3.5 32.27 3.52 FP-2 AX128 Systematic 2.3 3.5 43.91 3.52 FP-3 AX127 Systematic 3.9 3.5 14.81 13.60 FP-4 AY130 Systematic 4.8 3.6 26.45 13.60 FP-5 AY129 Systematic 6.5 3.6 38.09 13.60 FP-6 AY128 Systematic 8.1 3.6 49.73 13.60 FP-7 AY127 Systematic 9.7 3.6 20.63 23.68 FP-8 AZ129 Systematic 0.6 3.7 32.27 23.68 FP-9 AZ128 Systematic 2.3 3.7 43.91 23.68 FP-10 AZ127 Systematic 3.9 3.7 4.27 11.72 FP-11 AY131 Systematic 4.3 1.7 OL1-9 Fixed point Dimensions in FEET X Coord Y Coord Label Grid Type East North 67.67 11.55 FP-1 AX129 Systematic 2.1 11.5 105.85 11.55 FP-2 AX128 Systematic 7.5 11.5 144.03 11.55 FP-3 AX127 Systematic 12.8 11.5 48.59 44.61 FP-4 AY130 Systematic 15.8 11.8 86.76 44.61 FP-5 AY129 Systematic 21.2 11.8 124.94 44.61 FP-6 AY128 Systematic 26.5 11.8 163.11 44.61 FP-7 AY127 Systematic 31.9 11.8 67.67 77.67 FP-8 AZ129 Systematic 2.1 12.1 105.85 77.67 FP-9 AZ128 Systematic 7.5 12.1 144.03 77.67 FP-10 AZ127 Systematic 12.8 12.1 14.00 38.44 FP-11 AY131 Systematic 14.0 5.6 Xcoord and Ycoord values are from the origin pin AX1 31 East and North are from each grid ID pin Attachment 6-4 E900-05-014

OLl-10 SNEC Yard after backill N

m*u _

FP-1 =FP-1

• ~

PFP FFP-~

P-I 'FP- ' P PP, Origin Pin AX126 Attachment 6-5 E900-05-014

OL1-10 Fixed point Dimensions in METERS X Coord Y Coord Label GRID Type East North 2.87 3.64 FP-1 AX126 Systematic 2.87 3.64 14.09 3.64 FP-2 Ax125 Systematic 4.09 3.64 25.32 3.64 FP-3 Ax124 Systematic 5.32 3.64 36.54 3.64 FP-4 Ax123 Systematic 6.54 3.64 8.48 13.36 FP-5 AY126 Systematic 8.48 3.36 19.70 13.36 FP-6 AY125 Systematic 9.70 3.36 30.93 13.36 FP-7 AY123 Systematic 0.93 3.36 2.87 23.08 FP-8 AZ126 Systematic 2.87 3.08 14.09 23.08 FP-9 AZ125 Systematic 4.09 3.08 25.32 23.08 FP-10 AZ124 Systematic 5.32 3.08 36.54 23.08 FP-1 I AZ123 Systematic 6.54 3.08 OL -10 Fixed point Dimensions in FEET X Coord Y Coord Label GRID Type East North 9.41 11.95 FP-01 AX126 Systematic 9.4 12.0 46.22 11.95 FP-02 Ax125 Systematic 13.4 12.0 83.04 11.95 FP-03 Ax124 Systematic 17.4 12.0 119.85 11.95 FP-04 Ax123 Systematic 21.4 12.0 27.82 43.83 FP-05 AY126 Systematic 27.8 11.0 64.63 43.83 FP-06 AY125 Systematic 31.8 11.0 101.44 43.83 FP-07 AY123 Systematic 3.0 11.0 9.41 75.71 FP-08 AZ126 Systematic 9.4 10.1 46.22 75.71 FP-09 AZ125 Systematic 13.4 10.1 83.04 75.71 FP-10 AZ124 Systematic 17.4 10.1 119.85 75.71 FP-11 AZ123 Systematic 21.4 10.1 Xcoord and Ycoord values are from the origin pin AX126 East and North are from each grid ID pin Attachment 6-6 E900-05-014

OLI-11 Barrel Bunker Area N

Origin Pin AU126 Attachment 6-7 E900-05-014

OL1-1 I sample dimensions in METERS X Coord Y Coord Label Grid Type East North 2.50 6.95 FP-1 AU126 Systematic 2.5 7.0 13.72 6.95 FP-2 AU125 Systematic 3.7 7.0 24.95 6.95 FP-3 AU124 Systematic 4.9 7.0 36.17 6.95 FP-4 AU123 Systematic 6.2 7.0 8.11 16.67 FP-5 AV126 Systematic 8.1 6.7 19.33 16.67 FP-6 AV125 Systematic 9.3 6.7 30.56 16.67 FP-7 AV123 Systematic 0.6 6.7 2.50 26.39 FP-8 AW126 Systematic 2.5 6.4 13.72 26.39 FP-9 AW125 Systematic 3.7 6.4 24.95 26.39 FP-10 AW124 Systematic 4.9 6.4 36.17 26.39 FP-1 I AW123 Systematic 6.2 6.4 OL1-11 Fixed point Dimensions in FEET X Coord Y Coord Label Grid Type East North 8.20 22.80 FP-1 AU126 Systematic 8.2 22.8 45.01 22.80 FP-2 AU125 Systematic 12.2 22.8 81.82 22.80 FP-3 AU124 Systematic 16.2 22.8 118.64 22.80 FP-4 AU123 Systematic 20.2 22.8 26.60 54.68 FP-5 AV126 Systematic 26.6 21.9 63.42 54.68 FP-6 AV125 Systematic 30.6 21.9 100.23 54.68 FP-7 AV123 Systematic 1.8 21.9 8.20 86.56 FP-8 AW126 Systematic 8.2 21.0 45.01 86.56 FP-9 AW125 Systematic 12.2 21.0 81.82 86.56 FP-10 AW124 Systematic 16.2 21.0 118.64 86.56 FP-11 AW123 Systematic 20.2 21.0 Xcoord and Ycoord values are from the origin pin AU126 East and North are from each grid ID pin Attachment 6-8 E900-05-014

OLl-12 Line Shack Surrounding Area

/ Origin Pin AT122 Attachment 6-9 E900-05-014

OLl-12 Fixed point Dimensions in METERS X Coord Y Coord Label Grid Type East North 7.03 7.00 FP-1 AT122 Systematic 7.0 7.0 19.87 7.00 FP-2 AT121 Systematic 9.9 7.0 0.60 18.12 FP-3 AU122 Systematic 0.6 8.1 13.45 18.12 FP-4 AU121 Systematic 3.4 8.1 26.29 18.12 FP-5 AU120 Systematic 6.3 8.1 0.60 40.37 FP-6 AX122 Systematic 0.6 0.4 26.29 40.37 FP-7 AX120 Systematic 6.3 0.4 7.03 51.50 FP-8 AY122 Systematic 7.0 1.5 19.87 51.50 FP-9 AY121 Systematic 9.9 1.5 0.60 62.62 FP-10 AZ122 Systematic 0.6 2.6 13.45 62.62 FP-11 AZI21 Systematic 3.4 2.6 0.40 34.00 BP-01 AW122 Biased 0.4 4 15.00 45.00 BP-02 AX121 Biased 5 5 5.00 5.00 BP-03 AT122 Biased 5 5 OLl-12 Fixed point Dimensions in FEET X Coord Y Coord Label Grid Type East North 23.05 22.96 FP-1 AT122 Systematic 23.0 23.0 65.18 22.96 FP-2 AT121 Systematic 32.4 23.0 1.98 59.45 FP-3 AU122 Systematic 2.0 26.6 44.11 59.45 FP-4 AU121 Systematic 11.3 26.6 86.25 59.45 FP-5 AU120 Systematic 20.6 26.6 1.98 132.42 FP-6 AX122 Systematic 2.0 1.2 86.25 132.42 FP-7 AX120 Systematic 20.6 1.2 23.05 168.91 FP-8 AY122 Systematic 23.0 4.9 65.18 168.91 FP-9 AY121 Systematic 32.4 4.9 1.98 205.40 FP-10 AZI22 Systematic 2.0 8.6 44.11 205.40 FP-11 AZI21 Systematic 11.3 8.6 1.31 111.52 BP-01 AW122 Biased 1.3 13.1 49.20 147.60 BP-02 AX121 Biased 16.4 16.4 16.40 16.40 BP-03 AT122 Biased 16.4 16.4 Xcoord and Ycoord values are from the origin pin AT122 East and North are from each grid ID pin Attachment 6-1 0 E900-05-01 4

OLI-13 South and West SNEC Yard Perimeter N

0 3

CD

3 Old Macadam Parking lot I ..P

,- d~

F0.

m CD (0

0 I

01 0

JL Origin Pin AT131

OLl-13 Fixed point Dimensions in METERS X Coord Y Coord Label Grid Type East North 17.10 4.53 FP-1 AT130 Systematic 7.1 4.5 27.44 4.53 FP-2 AT129 Systematic 7.4 4.5 37.78 4.53 FP-3 AT128 Systematic 7.8 4.5 48.12 4.53 FP-4 AT127 Systematic 8.1 4.5 58.46 4.53 FP-5 AT126 Systematic 8.5 4.5 68.80 4.53 FP-6 AT125 Systematic 8.8 4.5 79.14 4.53 FP-7 AT124 Systematic 9.1 4.5 89.48 4.53 FP-8 AT123 Systematic 9.5 4.5 1.59 13.48 FP-9 AU131 Systematic 1.6 3.5 17.10 22.43 FP-10 AV130 Systematic 7.1 2.4 11.93 31.39 FP-11 AW130 Systematic 1.9 1.4 41.04 21.37 FP-12 AV127 Systematic 1.0 1.4 46.21 30.32 FP-13 AW127 Systematic 6.2 0.3 20.36 39.28 FP-14 AW129 Systematic 0.4 9.3 30.70 39.28 FP-15 AW128 Systematic 0.7 9.3 41.04 39.28 FP-16 AW127 Systematic 1.0 9.3 OL -13 Fixed point Dimensions in FEET X Coord Y Coord Label Grid Type East North 56.09 14.84 FP-1 AT130 Systematic 23.3 14.8 90.00 14.84 FP-2 AT129 Systematic 24.4 14.8 123.92 14.84 FP-3 AT128 Systematic 25.5 14.8 157.83 14.84 FP-4 AT127 Systematic 26.6 14.8 191.75 14.84 FP-5 AT126 Systematic 27.7 14.8 225.66 14.84 FP-6 AT125 Systematic 28.9 14.8 259.58 14.84 FP-7 AT124 Systematic 30.0 14.8 293.49 14.84 FP-8 AT123 Systematic 31.1 14.8 5.21 44.22 FP-9 AU131 Systematic 5.2 11.4 56.09 73.59 FP-10 AV130 Systematic 23.3 8.0 39.13 102.96 FP-11 AW130 Systematic 6.3 4.6 134.60 70.09 FP-12 AV127 Systematic 3.4 4.5 151.56 99.46 FP-13 AW127 Systematic 20.4 1.1 66.77 128.83 FP-14 AW129 Systematic 1.2 30.4 100.68 128.83 FP-15 AW128 Systematic 2.3 30.4 134.60 128.83 FP-16 AW127 Systematic 3.4 30.4 Xcoord and Ycoord values are from the origin pin AT131 East and North are from each grid ID pin Attachment 6-12 E900-05-014

Site Report Site Summary Site Name: SSGS and SNEC Open land Planner(s): WJCooper Contaminant Summary NOTE: Surface soil DCGLw unts are pCVg.

Building surface DCGLw units are dpm/100 cm2.

Screening Contaminant Type DCGI Lw Value Used? Area (m') Area Factor Cs-137 Surface Soil 4.3t2 No 400 3 100 3.6 25 4.7 I 28.7 Attachment 7-1 E900-05-014 OM PASS v1.0.0 313/2005 Page 1

Surface Soil Survey Plan Contaminant Summary SSGS and SNEC Open Land OLI DCGLw Inferred Modified DCGLw Scan MDC Contaminant (pCi~g) Contaminant Ratio (pCi/g) (pClg)

Cs-137 4.30 N/A N/A N/A 6.2 Survey Unit Estimate Reference Area Estimate (Mean i 1-Sigma) (Mean 1-Sigma)

A Contaminant (pCl/g) (pCUg)

Cs-137 0.32Ak 0.3 N/A Atffachment 7-2 F900-05S-014 COMPASS v1.0.0 312312005 Page 2

LEFT INTENTIONALLY BLANK Attachment 7-3 E900-05-014

Surface Soil Survey Plan Survey Plan Summary Site: SSGS and SNEC Open land Planner(s): WJCooper Survey Unit Name: Open Land ARea CV OLI-9 Comments:

Area (m2): 4I00'ThI Classification: 1 Selected Test: Sign 7' " Estimated Sigma (pCi/g): 0.3 DCGL (pCi/g): 4.30 Sample Size (N): 11 LBGR (pCi/g): 3.4 Estimated Conc. (pCi/g): 0.3 Alpha: 0.050 Estimated Power 1 Beta: 0.100 EMC Sample Size (N): 11 Scanning Instrumentation: Nal Prospective Power Curve o1 I - I~- I x i-

_ 09 1 I__ I

- 0.8

-I -

,., 0.7 ci r 0.6 - - - - - -- - -

I I r 0.5 II

-E 0.4 E

S' 0.2 S.. II c 0.1

=

-O .I I- I-0.0 0.5 1.0 1.5 2D0 2.5 3.0 3.5 4.0 4.5 5.0 Soil Concentraton (pCig), icludiAg backgrnund

- Power - DCGL - - Estinated Power

- LBGR

• 1Af¶chment 7-4 E900-05-014 C O M P A SS~~~~~ 1 31 0 5P . . g :

COMPASS v1.0.0 411312005 Page I

Surface Soil Survey Plan Survey Plan Summary Site: SSGS and SNEC Open land Planner(s): WJCooper Survey Unit Name: SNEC Yard Excavation After Backfill OLI-10 Comments:

Area (m2): 1,200 Classification: 1 Selected Test: Sign Estimated Sigma (pCi/g): 0.3 DCGL (pCi/g): 4.30 Sample Size (N): 11 LBGR (pCi/g): 3.4 Estimated Conc. (pCi/g): 0.3 Alpha: 0.050 Estimated Power: 1 Beta: 0.100 EMC Sample Size (N): 11 Scanning Instrumentatic on: Nal Prospective Power Curve

_ 1 V.

0.8 0.7

_z-o 0.8

. 0.5 IH H II D.4 t 0.6 - I1 1 I T 1 _ _.1_ 1 _ _

u: 0.5

= 0.4

. 03 I0..

to 0.1 1- T _

_ I G- 0 I _ _

0 1 2 3 4 S Soil Concentfrmon (pCifg), including backgrund

- Power - DCGL - - Estimated Power

- LBGR S l-beta Attachment 7-5 E900-05-014 COMPASS v1.0.0 3/312005 Page I

Surface Soil Survey Plan Survey Plan Summary Site: SSGS and SNEC Open land Planner(s): WJCooper Survey Unit Name: Barrrel Bunker Area OL1-11 Comments:

Area (M 2 ): ° K Classification: I Selected Test: Sign Estimated Sigma (pCilg): 0.3 DCGL (pCi/g): 4.30 Sample Size (N): 11 LBGR (pCi/g): 3.4 Estimated Conc. (pCilg): 0.3 Alpha: 0.050 Estimated Power: 1 Beta: 0.100 EMC Sample Size (N): 11 Scanning Instrumentation: Nal Prospective Power Curve W.

Ca

> 09

& 0.8

- 0.7

r. 0.6

.05 c 0.4 I 03 0.2 t 0.1 E

0 1 2 3 4 S Soil Concentfaion (pCi'g), including backgmuna

- Power - DCGL - - Estmated Power

- LBGR

• 1-beta Attachment 7-6 E900-05-014 COMPASS v1.0.0 V312DOS Page 1

' ' Surface Soil Survey Plan Survey Plan Summary Site: SSGS and SNEC Open land Planner(s): WJCooper Survey Unit Name: Line Shack Surrounding Area OLI-12 Comments: Not including line shack and ramp Area (in2 ): /s Classification: 1 Selected Test: Sign Estimated Sigma (pCi/g): 0.3 DCGL (pCi/g): 4.30 Sample Size (N): 11 LBGR (pCilg): 3.4 Estimated Conc. (pCi/g): 0.3 Alpha: 0.050 Estimated Power 1 Beta: 0.100 EMC Sample Size (N): 11 Scanning Instrumentation: Nal Prospective Power Curve

- 1

-- 1 \ I tos

_ 09

=A 0.8 C

- 0.7 t 0.6 0.5 I -_--

as.

r_0.4 I

. 03 TZ; _ __

6' 0.2 -4 _

0.1 O.

0 1 2 3 4 5 Soil Concenfration pCiMg), including background

- Power DCGL - - Estimated Power

- LBGR

• 1-beta Attachment 7-7 E900-05-014 COMPASS v1.0.0 3132005 Page I

Surface Soil Survey Plan Survey Plan Summary Site: SSGS and SNEC Open land Planner(s): WJCooper Survey Unit Name: South and West SNEC Yard Perimeter OL1 -13 Comments:

Area (m2 ): 4-Oge-a V f0 Classification: 1 Selected Test: Sign Estimated Sigma (pCilg): 0.3 DCGL (pCilg): 4.30 Sample Size (N): 11 LBGR (pCi/g): 3.4 Estimated Conc. (pCi/g): 0.3 Alpha: 0.050 Estimated Power. 1 Beta: 0.100 EMC Sample Size (N): 11 Scanning Instrumentation: Nal Prospective Power Curve I

W 0.9 I - a

-I _ __ I__ _ _ _ _ _ _ _

2c 0.9

0. -I

= 0.6 C

. 0.3

_ 0.6 -II 5

if. 03

-I __ _ _ __ _ _ _ _ _ __ _ _ _ _ _ _ _

vN_

go 0.1 E

0 2 2 3 4 5 Soil Concentrmtioi (p Mig), includinig backgzvuna

- Power -DCGL - -Estimated Power

- LOGR n 1-beta Attachment 7-8 E900-05-014 COMPASS vi.0.0 =t12005 Page 1

Recent OL1 Soil Sample Results G sd Cs137p( Date Mean 0.32 Fstd Dev 0.30 AT125 0.13 12/14/2004 AT125 0.27 1211412004 AT124 0.3 12/13/2004 AT124 0.42 12/13/2004 AT123 0.82 12/13/2004 AT123 0.8 12/13/2004 AT122 0.07 12114/2004 AT122 0.1 12/14/2004 AU125 0.13 12/14/2004 AU125 0.14 12/1412004 AU124 0.4 12/14/2004 AU124 0.4 12/14/2004 AU123 0.3 12/14/2004 AU123 0.5 12/14/2004 AU122 0.34 12/14/2004 AU122 0.84 12/14/2004 AV122 0.55 12/13/2004 AV122 0.16 12/13/2004 AW123 0.13 12/14/2004 AW123 0.16 12114/2004 AW123 0.13 12/14/2004 AW122 0.9 12/13/2004 AW120 0.33 1/26/2005 AX131 0.15 9/21/2004 AX131 0.13 9/21/2004 AX130 0.3 4/2212004 AX130 0.13 4/22/2004 AX130 0.15 4/22/2004 AX 30 0.3 4/22/2004 AX130 0.1 4/22/2004 AX129 0.4 4/22/2004 AX129 0.08 4/27/2004 AX129 0.1 4/27/2004 AX129 0.35 4/27/2004 AX128 0.08 4/26/2004 AX128 0.2 4/26/2004 AX128 0.08 4/26/2004 AX128 0.17 4/26/2004 Ax126 0.56 1/5/2005 Ax126 0.09 1/5/2005 AX124 0.06 1/4/2005 AX124 0.06 1/4/2005 Attachment 8-1 AZ122 0.22 10/20/2004 E900-05-014 AZ122 0.2 10/20/2004 AZ122 0.36 1/12/2005

T)0 ,!. 2,f///,f x-6-C/ r2 AZ122 0.24 1/12/2005 Recent OL1 soil results (con't)

AZ122 0.13 1/12/2005 AZ122 0.34 1/1212005 AZ122 0.2 1/12/2005 AZ121 0.5 10/20/2004 AZI21 0.15 10/20/2004 AZI21 0.28 1/12/2005 AZ121 0.1 1/12/2005 AZ121 0.08 1/12/2005 AZI21 0.08 1/12/2005 AZI 21 0.09 1/12/2005 AU121 0.15 1/26/2005 AU121 0.6 1/26/2005 AT121 0.24 1/26/2005 AT121 0.15 1/26/2005 AU120 0.4 1/26/2005 AU120 0.23 1/26/2005 AV121 0.66 1/26/2005 AV121 1.8 1/26/2005 AV120 0.66 1/2612005 AV120 0.3 1/26/2005 AW121 1 1/26/2005 AW121 0.9 1/26/2005 AW120 0.14 1/26/2005 Attachment 8-2 E900-05-014

&~.

16:55 1uu4 614b~b23I1ZiY WtU bNLU 1'04U 1 LI I Y KAVU-)N No~kr Us 03/08/2005 NORF/~ 3-i-S 8EYE ST.- 318/O'. 14:33 ":I7

• 8SCL COT I2E /80r ' 4414 - 1'" - eOSCL 3 110 60 ~S L MM A 14:553- ' -1SSCL~

...GS'S SWE: t ~150 - 0 '80SCL 20SS~E~~ ...

.80.151 4' -174 0St Attachment 8-3 E900-05-014

Exhibit I Survey Unit Inspection Check Sheet 04 RU "INAL G"'

,5 ,' SE TON SURVEYUONIT.INSiPECTION ESCRIP Survey Unit # OL-1 (Land) Survey Unit Location CV & SSGS Footprints / CV Yard Date l 4-1805 I Time l 1500 l Inspection Team Members I R. Shepherd

..4 II".

,, 7e ..,'

'.. tF....

• ... I - -SECTION 2-SURVEY UNITJINSPECTION -SCOPE.,,

I Inspection Requirements (Check the appropriate Yes/No answer.)

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

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

3. Is the physical work (i.e.. remediation & housekeeping) in or around the survey unit complete?

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

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

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

7. Are the survey surfaces free of all paint, which has the potential to shield radiation?

8. Have the Surface Measurement Test Areas (SMTA) been established? (Refer to Exhibit 2 for instructions.)

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

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

11. Is lighting adequate to perform the FSS?

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

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

14. Have all unsatisfactory conditions been resolved?

NOTE: If a 'No answer Is obtained above, the inspector should Immediately correct the problem or Initiate corrective actions through the responsible sie department, as applicable. Document actions taken and/or ustifications In the 'Comments section below. Attach additional sheets as necessary.

Comments:

Items # 3 and 4 - Shonka surveyed dirt piles cover the majority of the CV and SSGS footprint areas; also there are materials, tools and equipment stored within the survey unit south of the SSGS and line building that will require relocation. Lou Shamenek notified.

Item # 12 - Several grids and grid portions are located inside the switchyard fence presenting potential electrical hazard.

Item # 13 - Photographs of the survey unit were taken to show present existing conditions.

Attachment 9-1 E900-05-014 Survey Unit Inspector (print/sign) R. Shepherd r Date 4/19/05 Survey Designer (print/sign)IW. Cooper Date // -

Appendix B Open Land Survey-Design Revision 1

ORIGINAL SNEC CALCULATION COVER SHEET CALCULATION DESCRIPTION Calculation Number Revision Number Effective Date Page Number E900-05-014 I I of 11 Subject SNEC Plant Area Open Land - OL1 - Survey Design Question I - Is this calculation defined as 'in QA Scope? Refer to definition 3.5. Yes 0 No El Question 2-Is this calculation defined as a Design Calculation"? Refer to definitions 3.2 and 3.3. Yes 0E No I]

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 Originator's Immediate supervisor should not review the calculation as the Technical Reviewer.

DESCRIPTION OF REVISION I - Revision 1 adds the soils in the SSGS OL1-8 area. Text is changed and attachments added. The full revised text is provided, but only those attachments that have been added or revised are included here.

APPROVAL SIGNATURES Calculation Originator W. J. Cooper CHpftr-. Date Technical Reviewer T. Tritchl 4 6 ). Date Additional Review A. Paynteri Date Rk!Ny2005 Additional Review Date

1 .SNEC CALCULATION SHEET Calculation Number Revision Number Page Number E900-05-014 1 Page 2 of 11 Subject SNEC plant area open land - OL1 - Survey Design 1.0 PURPOSE 1.1 The purpose of this calculation is to develop a survey design for the Saxton Nuclear Experimental Corporation OL1 SNEC and SSGS open land" areas that are located in the original SNEC facility site and the site of the Saxton Steam Generating Station (SSGS). The area (OL1) is approximately 11600 square meters, including the 1018 square meters in the existing east yard tank excavation. The area is a Class 1 survey area for the soils. Because the survey area exceeds the 2000 square meter limitation in Table 5-5 of the SNEC LTP (Reference 3.5) for maximum class 1 open land survey unit area, this survey area is subdivided into multiple survey units.

1.2 Multiple survey units of exposed concrete or macadam: MA8, DB1, PF1, SS12, SS24, and DB5 will be covered in a separate survey design (E900-05-015). This includes small concrete pads and monoliths, macadam driveways and parking areas, and the remaining pad footprints from the DSF building and the SSGS.

1.3 The Yard Storage Tank Excavation OL1-7 is covered in a separate design (E900-05-012).

1.4 This survey design includes six survey units:

1.4.1 OL1-8, about 1448 square meters consisting of the soil and building debris filled areas in and around the SSGS (Attachment 1-2). The northwest portion of the area, about 4 grids, may have concrete under a soil layer. Sampling done in this area should go down to the concrete layer and stop if shallower than 1 meter.

1.4.2 OL1-9, consisting of the 1290 square meter area around and including the CV footprint between the SSGS footprint and the east yard excavation (Attachment 1-3).

1.4.2.1 This area has some exposed concrete NW of the CV.

1.4.2.2A driveway/parking area west of the CV (145 M2) has a thin (about 4 to 6 inches) soil cover. The soil will be surveyed under this design, then removed to expose the pavement, which will then be separately surveyed under design E900-05-015.

1.4.2.3 A portion of OL1 in this vicinity is inside the switchyard (e.g. grid AZI31 and portions of others) and will be surveyed with the switchyard under another design.

1.4.3 OLl-10 which consists of about 1200 square meters of the SNEC yard (RWST, RWDF, east yard excavation). This area must be surveyed after the east yard excavation is backfilled (Attachment 1-4) so that the as-left soil surface is surveyed.

1.4.4 OL1-1 1 the barrel bunker area about 1200 square meters (Attachment 1-5).

1.4.5 OL1-12, the line shack surrounding area of about 1575 square meters (Attachment 1-6) not including the line shack itself, which was previously surveyed.

1.4.5.1 Portions of this survey unit are gravel road.

1.4.5.2 There are a number of small concrete or macadam ramps and sidewalks around the line shack. These paved surfaces will be separately surveyed under design E900-05-015.

. rSNEC CALCULATION SHEET Calculation Number Revision Number Page Number E900-05-014 1 Page 3 of 11 Subject SNEC plant area open land - OL1 - Survey Design 1.4.6 OL1-13, an odd shaped perimeter of soil of approximately 1480 square meters around the barrel bunker area and the DSB slab and pavement (Attachment 1-7).

1.5 The general layout of these survey units is shown in Attachment 1-1.

1.6 Fences in and/or bordering the area will be surveyed using a separate design E900-05-023.

2.0

SUMMARY

OF RESULTS The following information should be used to develop a survey request for this survey unit. The effective DCGLw value is listed below. The US NRC has reviewed and concurred with the methodology used to derive these values. See Attachment 2-1 to 2-4. These are copied from Reference 3.10 which was previously approved.

Table 1, DCGLw Values IVolumetric DCGLw (pClg - Cs- 37) 5.73 (4.3 A.L.)

NOTE: A.L is the site Administrative Umit (75% of effective DCGLw) 2.1 Survey Design 2.1.1 Scanning of soil (and fill materials) shall be performed using a 2" D by 2" L Na!

detector with a Cs-137 window setting (Reference 3.1). The window will straddle the Cs-137 662 keV full energy peak width (see typical calibration information on Attachment 3-1).

2.1.2 The instrument conversion factor/efficiency shall not be less than that assumed on Attachment 4-1 as 205.6 cpm/uR/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 must demonstrate detection efficiencies at or above the value listed in Section 2.1.2 above.

Table 2, Soil Scanning Parameters MDCscan(pClIg)-Cs-13r Scan Speed (cmilsec) Maximum Distance from Surface Action Level  % Coverage 6.2 25 4'(gap betweendetectorface&soilsurface) >175ncpm 100%

See Attachment 4-1 2.1.4 The action level specified is based on the MDCscan at a 300 cpm background. This is adequate since the MDCscan is expected to be less than the DCGLw times the area factor. Typical observed backgrounds are about 100 to 200 cpm (Attachment 8-3).

2.1.5 If a net count rate greater than the action level of Table 2 is encountered during the scanning process, the surveyor should stop and locate the boundary of the elevated area. The surveyor should then mark the elevated area with stakes or other appropriate marking methods. Continue the scan survey. Sample the elevated areas(s) lAW SNEC procedure E900-IMP-4520.04 (Reference 3.2), and Section 2.2 of this document following evaluation and investigation survey planning.

am SNEC CALCULATION SHEET Calculation Number Revision Number l Page Number E900-05-014 I I Page 4 of 11 Subject SNEC plant area open land - OL1 - Survey Design 2.1.5.1 Class 1 soil should be scanned using a serpentine pattern that is -0.5 meters wide.

2.1.5.2This is a class 1 survey area. All accessible soil surfaces are required to be 100% scanned.

2.1.5.3 There is a large pile of 'PRI' soil in the south-central portion of OL1-9 on the CV cap and in the central portion of OL1-8 in the area of the SSGS turbine hall. These piles should be removed prior to completion of the survey, so that the soils under the piles are subjected to the survey requirements of this design. No significant areas of residual concrete surfaces are expected to be exposed by removal of the PRI soil piles.

2.1.5.4The soil piles are established PRI areas, and were previously 100% scan surveyed and sampled during an automated conveyor measurement campaign in the summer of 2003 as SR186 and 190 (References 3.15 and 3.16). The results of this survey indicate that the soil piles meet LTP residual activity release requirements and the thoroughness of the survey is adequate to meet FSS measurement needs. One hundred and fifty-seven composite samples were collected of the scanned soil, all of which are less than 25 percent of the AL in this design. Additionally, the automated scanning (see Reference 3.17 for data on a previous scanning campaign) typically achieved an alarm setpoint less than 70% of the AL and detection limits substantially below the alarm setpoints. The soil piles are expected to be used as backfill elsewhere around the plant.

2.1.5.5 Areas that cannot be accessed should be clearly noted along with the reason for not completing the scan in that area.

2.1.6 The minimum number of soil sampling points indicated by the COMPASS computer program (Reference 3.3) is 11 for most of the survey units (see COMPASS output on Attachment 7-3 to 7-8). However, the number of samples is increased to 16 in OLI-13 and 18 in OL1-8 to provide a more widely distributed layout of sample points in the unusual shapes.

2.1.6.1 Sampling depth should be lAW Section 2.2.

2.1.6.2 The MDCscan (soil) exceeds the effective administrative DCGLw for Cs137 (6.2 pCig MDCscan @300cpm bkg > 4.3 pCi/g AL) but given the area factor for the assumed 1 meter squared elevated area (AF 28.7) and for the effective sample area (AF > 3), the scan MDC meets MARSSIM requirements.

2.1.7 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

_- SNEC CALCULATION SHEET calculation Number Revision Number Page Number E900-05-014 1 Page 5 of 11 Subject SNEC plant area open land - OL1 - Survey Design

• coverage concerns (see Attachment 6-1 to 6-12 for VSP sampling point locations) 2.1.8 The starting points for physically locating sample sites in the survey unit are based on measurements from site grid pins or other evident markers (see diagrams on Attachment 6-1, 6-3, 6-5, 6-7, 6-9, and 6-11). Soil sampling points are positioned using coordinates developed from these markers and listed on Attachments 6-2, 6-4, 6-6, 6-8, 6-10, and 6-12.

2.1.9 Because of the proximity to the RWDF and drum bunker, a biased sample location (BP-01) is placed in OLl-12 west of the line shack between the line shack wall and the fence.

2.1.10 Because of the potential for residual activity transfer through vehicle movement and post-shutdown topfill on the gravel, two biased samples locations (BP-02 and BP-03) are defined in the gravel areas north and south of the line shack in OL1-12. See note below for sampling process for gravel areas.

2.1.11 A portion of the area of OL1-9 has a layer of old pavement underneath of a thin (4-6 inch) layer of soils. This area is indicated by the darker color on Attachment 6-3. The soil sample in this area should only be collected from the soils on top of the pavement. Cutting down through the pavement to obtain a deeper sample is not required. The soil will be removed after FSS of the soil so that the pavement can be separately surveyed under design E900-05-015.

2.1.12 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.

2.1.13 When an obstruction is encountered that will not allow collection of a sample, contact the cognizant SR coordinatorforpermission 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 the biased and random fixed points and any elevated areas(s) IAW SNEC procedure E900-IMP-4520.04 (Reference 3.2) and the following.

Mn SNEC CALCULATION SHEET Calculation Number Revision Number Page Number E900-05.014 I Page 6 of 11 Subject SNEC plant area open land - OL1 - Survey Design 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 1 meter deep core. Section 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. Sampling due to an instrument alarm condition should also be of the entire 1 meter of soil/material.

The gravel samples in OLI-12 (including the two biased samples BP-02 and BP-03) should be sampled by collecting two well mixed samples of the layers, one of the gravel overburden layer, and a second of the underlying soil down to a total of 1 meter in depth.

This same process should be used whenever a random point lies on a gravel road or gravel parking area.

For the fixed point soil samples in OLI-9 over the pavement (FP-11) and OL1-8 in the northwest (FP-13, 14, 16, 17, and 18), only the soil layer on top of the pavement (if pavement is present) is to be sampled under this design.

2.2.1 Clearly mark, identify and document all sample locations.

2.2.2 Sample any location that is above the action level cited is Table 2 based on specific investigation plan.

2.2.3 Maintain chain-of custody requirements on all design fixed point and action level samples (Reference 3.14).

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", 8/7/03.

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 SNEC survey Nal measurements in OL1 & OL2 3/8/05 3.8 GPU Nuclear, SNEC Facility, "Site Area Grid Map", SNECRM-020, Sheet 1, Rev 4, 1/18/05.

3.9 SNEC Calculation No. E900-03-012, Effective DCGL Worksheet Verification.

3.10 SNEC Calculation No. E900-04-005 OCV Yard Survey Design - North West Side of CV" 3.11 SNEC Procedure E900-IMP-4520.06, "Survey Unit Inspection in Support of FSS Design".

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

fMV SNEC CALCULATION SHEET Calculation Number Revision Number Page Number E900-05-014 1 Page 7 of 11 Subjed SNEC plant area open land - OLI - Survey Design 3.13 Microsoft Excel 97, Microsoft Corporation Inc., SR-1 and SR-2,1985-1997.

3.14 SNEC Procedure E900-ADM-4500.39 'Chain of Custody for Samples" 3.15 SNEC survey SR0186 3.16 SNEC survey SR0190 3.17 "Final Report for Survey of Debris Pile", Revision 3 1/4/05 Shonka Research Associates 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 Scoping and post-remediation soil samples from this area are used as the initial estimate of variability. These results are shown on Attachment 8-1 and 8-2. The grid locations where these samples were taken are shown on Attachment 1-1.

4.3 The MARSSIM Sign Test (Reference 3.12) will be applicable for this survey design. No background subtraction will be performed under this criteria during the DQA phase. Normal environmental background of Cs137 will (conservatively) not be subtracted.

4.4 The required number of fixed survey points as determined by COMPASS are then located on the survey map for the survey unit by the Visual Sample Plan (VSP) computer code (Reference 3.4).

4.5 Reference 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 ranges from about 100 cpm to about 200 cpm (Reference 3.7). See Attachment 8-3.

4.7 The determination of the physical extent of this area is based on the drawing Reference 3.8 and numerous walkdowns and measurements.

4.8 Remediation History: OL1 is an open land area. Portions contained the original SNEC site facility and the Saxton Steam Generating Station. Extensive remediation has occurred in the survey area.

4.8.1 The SNEC Radwaste building (RWDF), Control and Auxiliary (C&A) building, Containment Vessel (CV), the SSGS, various buried pipe tunnels and underground tanks were all extensively remediated by removal, various decon methods and extensive concrete removal. The buildings were then demolished to grade or below.

The residual building portions have been previously surveyed and the release surveys have been accepted.

4.8.2 Extensive soil remediation (removal) was performed.

4.8.3 The SSGS was backfilled when it was permanently shut down. Subsequently, activity was found using core bores. The SSGS backfill was removed and surveyed through an automated conveyor system. Additional concrete surfaces in the SSGS basement were remediated and then the scanned backfill was replaced.

.- ?_ SNEC CALCULATION SHEET Calculation Number Revision Number Page Number E900-05-014 1 Page 8 of 11 Subject SNEC plant area open land - OLI - Survey Design 4.8.4 The underground tank excavation was backfilled after the tanks were removed early in the project. This backfill was removed. Portions were disposed of as radioactive waste, while the remainder was scanned using a automated conveyor scanning system and is currently stored for re-use.

4.8.5 The barrel bunker was removed to below grade.

4.8.6 Underground drainage and sewerage systems have been removed.

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-1 37 DCGLw from the SNEC LTP (6.6 pCVg) 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 used to determine the effective radionuclide mix for the OL1 area has been drawn from samples that were assayed at off-site laboratories. This list is shown on Attachment 2-1 through 2-3, and includes twenty-one analysis results. Review of the data shows several radionuclides were not positively identified at any significant concentration.

These radionuclides have been removed from the data set and are not considered further as any minor contribution is accounted for by the administrative reduction of the surrogate DCGLw to 75% of the surrogate DCGLw based on the identified nuclide ratios.

Radionuclides remaining include H-3, Co-60, Sr-90, and Cs-137. Additionally, the data shows Cs-137 to be the predominant radioactive contaminant (based on activity) found in the area.

4.11 The decayed set of sample results were input to the spreadsheet titled "Effective DCGL Calculator for Cs-1 37" (Reference 3.9) to determine the effective volumetric DCGLw values for the OL1 area. The output of this spreadsheet is shown on Attachment 2-4. This data is copied from Reference 3.10.

4.12 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-137. Additionally, the detection system incorporates a Cs-137 window that lowers sensitivity to background in the survey unit. The resulting range of background values varies from about 100 to 200 cpm (Attachment 8-3).

4.13 The survey unit described in this survey design was inspected after remediation efforts were shown effective. A copy of the OL1 specific portion of the SNEC facility post-remediation inspection report (Reference 3.11) is included as Attachment 9-1.

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

4.15 The decision error for this survey design is 0.05 for the a value and 0.1 for the p value.

4.16 "Special measurements" (as described in the SNEC LTP sec 5.5.3.4) are included in this survey design. Section 5.5.3.4.4 discusses re-fill materials. Portions of this survey will include areas that consist of crushed structural materials and backfill. These will be treated as soil for scanning and sampling.

0- a SNEC CALCULATION SHEET Calculation Number Revision Number Page Number E900-05-014 I Page 9 of 11 Subject SNEC plant area open land - OLI - Survey Design 4.17 No additional sampling will be performed lAW this survey design beyond that described herein.

4.18 SNEC site radionuclides and their individual DCGLw values are listed on Exhibit I of this calculation based on Table 5-1 of Reference 3.5.

4.19 The survey design checklist is listed in Exhibit 2.

4.20 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 (Reference 3.13) spreadsheet.

6.0 APPENDICES 6.1 Attachment 1-1, is a diagram of survey unit OL1. Attachment 1-2 through 1-7 are the grid layouts for the six OL1 open land survey units included in this design.

6.2 Attachment 2-1 to 2-4 is the DCGLw calculation logic and sample results from the OL1 and OL2 areas in addition to the DCGL calculation sheets (decayed to January 15, 2004).

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/cm3 Cs-137 source term in a end-cylinder geometry.

6.6 Attachment 6-1 to 6-12, show the randomly picked scan locations (from VSP) and reference coordinates for the six OLI open land survey units included in this design.

6.7 Attachment 7-1 is a COMPASS output showing the area factors used. Attachment 7-2 shows the variability used for all six survey units. Attachments 7-3 through 7-8, are the COMPASS output for the six OL1 open land survey units included in this design, showing the number of sampling points in the survey unit, area factors, and prospective power.

6.8 Attachment 8-1 and 8-2, is the soil variability results from selected recent soil samples from the OL1 area. Attachment 8-3 is the general area Nal detector backgrounds measured on 3/8/05.

6.9 Attachment 9-1, is the results of the inspection report for the OL1 area.

e a s SNEC CALCULATION SHEET Calculation Number Revision Number Page Number E900-05-014 I I Page 10 of 11 Subject SNEC plant area open land - OL1 - Survey Design Exhibit I SNEC Facility Individual Radionuclide DCGL Values (a) 25 mremly Limit 4 mremly Goal 25 mremly Limit (All Pathways) (Drinking Water)

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

(dpm/100cm 2) (Surface & Subsurface) (Surface & Subsurface)

(pClIg) (pClIg)

Anm-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 mremly regulatory limit will be controlled under this LTP 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).

?-a SNEC CALCULATION SHEET Calculation Number Revision Number Page Number E900-05-014 I Page 11 of 11 Subject SNEC plant area open land - 011 - Survey Design Exhibit 2 Survev Deslan Checklist Calculation No. Location Codes E900-05-014 SNEC plant area open land - O1l - Survey Design ITEM lREVIEW ITMRVEWFCSStatus FOCUS Reviewer (Clrcle One) Initials & Date I Has a survey design calculation number been assigned and is a survey design summary /A?%\

._____ description provided?

2 Are drawings/diagrams adequate for the subject area (drawings should have compass N/A

____headings)? " /

3 Are boundaries properly Identified and is the survey area cdassification dearly indicated? e N/A 4 Has the survey area(s) been properly divided Into survey units IAW EXHIBIT 10 (e N/A 5 Are physical characteristics of the area/location or system documented? N/Aes a

6 Is a remnediation effectiveness discussion induded? N/A 7 Have characterization survey and/or sampling results been converted to units that are N/A comparable to applicable DCGL values? ' 1 . -r&

8 Issurvey and/or sampling data that was used for determining survey unit variance Induded? ed) N/A 7VT 9 Is a description of the background reference areas (or materials) and their survey and/or Y sampling results Induded along with a justification for their selection? I Air (,d 10 Are applicable survey and/or sampling data that was used to determine variability Included? N/A 11 Wiln the condition of the survey area have an Impact on the survey design, and has the Yes, probable Impact been considered in the design? ....

Yes, ..  :* i2 5 Has any special area characteristic including any additional residual radioactivity (not 12 previously noted during characterization) been Identified along with Its impact on survey YesNIA design? .8 13 Are all necessary supporting calculations and/or site procedures referenced or Included? N/A T 2 14 Has an effective DCGLw been identified for the survey unit(s)? 6 N/A 15 Was the appropriate DCGLEwC included in the survey design calculation? Y 1A) 16 Has the statistical tests that will be used to evaluate the data been identified? (Yes NA 17 Has an elevated measurement comparison been performed (Ciass 1 Area)? Yes, 18 Has the decision error levels been identified and are the necessary justifications provided? Yes N/A rI E 19 Has scan Instrumentation been Identified along with the assigned scanning methodology? es N/A 20 Has the scan rate been identified, and is the MDCscan adequate for the survey design? es) N/A I 21 Are special measurements e.g.. in-situ gamma-ray spectroscopy required under this design. Y N/A and Is the survey methodology, and evaluation methods described?

22 Is survey Instrumentation calibration data induded and are detection sensitivities adequate? Ye N/A 23 Have the assigned sample and/or measurement locations been dearly identified on a diagram Q N/A -M_ I or CAD drawing of the survey area(s) along with their coordinates?i 24 Are investgabon levels and administrative limits adequate, and are any associated actions N/ATi clearly indicated?

d 'J9 NAx 25 For sample analysis, have the required MDA values been determined.?Yes, 26 Has any special sampling methodology been Identified other than provided In Reference 6.3? N/A NOTE: a copy of this completed form or equivalent, shall be included within the survey design calculation.

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OL1-8 Fixed point Dimensions in METERS X Coord Y Coord Label Grid Type East North 0.36 3.22 FP-1 AT135 Systematic 0.4 3.2 38.92 3.22 FP-2 AT132 Systematic 8.9 3.2 0.36 19.92 FP-3 AU135 Systematic 0.4 9.9 5.18 28.26 FP-4 AV135 Systematic 5.2 8.3 14.82 28.26 FP-5 AV134 Systematic 4.8 8.3 24.46 28.26 FP-6 AV133 Systematic 4.5 8.3 34.10 28.26 FP-7 AV132 Systematic 4.1 8.3 0.36 36.61 FP-8 AW135 Systematic 0.4 6.6 10.00 36.61 FP-9 AW135 Systematic 9.999 6.6 19.64 36.61 FP-10 AW134 Systematic 9.6 6.6 29.28 36.61 FP-1 I AW133 Systematic 9.3 6.6 38.92 36.61 FP-12 AW132 Systematic 8.9 6.6 5.18 44.96 FP-13 AX135 Systematic 5.2 5.0 14.82 44.96 FP-14 AX134 Systematic 4.8 5.0 34.10 44.96 FP-15 AX132 Systematic 4.1 5.0 0.36 53.31 FP-16 AY135 Systematic 0.4 3.3 10.00 53.31 FP-17 AY135 Systematic 9.999 3.3 19.64 53.31 FP-18 AY134 Systematic 9.6 3.3 OL1-8 Fixed point Dimensions in FEET X Coord Y Coord Label Grid Type East North 1.18 10.56 FP-1 AT135 Systematic 1.2 10.6 127.65 10.56 FP-2 AT132 Systematic 29.2 10.6 1.18 65.32 FP-3 AU135 Systematic 1.2 32.5 16.99 92.70 FP-4 AV135 Systematic 17.0 27.1 48.61 92.70 FP-5 AV134 Systematic 15.8 27.1 80.22 92.70 FP-6 AV133 Systematic 14.6 27.1 1i1.84 92.70 FP-7 AV132 Systematic 13.4 27.1 1.18 120.08 FP-8 AW135 Systematic 1.2 21.7 32.80 120.08 FP-9 AW135 Systematic 32.8 21.7 64.41 120.08 FP-10 AW134 Systematic 31.6 21.7 96.03 120.08 FP-11 AW133 Systematic 30.4 21.7 127.65 120.08 FP-12 AW132 Systematic 29.2 21.7 16.99 147.47 FP-13 AX135 Systematic 17.0 16.3 48.61 147.47 FP-14 AX134 Systematic 15.8 16.3 111.84 147.47 FP-15 AX132 Systematic 13.4 16.3 1.18 174.85 FP-16 AY135 Systematic 1.2 10.8 32.80 174.85 FP-17 AY135 Systematic 32.8 10.8 64.41 174.85 FP-18 AY134 Systematic 31.6 10.8 Xcoord and Ycoord values are from the origin pin AT135 East and North are from each grid ID pin Attachment 6-2 E900-05-01 4

,WYSurface Soil Survey Plan Survey Plan Summary OL. I -

Site: SSGS and SNEC Open land Planner(s): WJCooper Survey Unit Name: Backfilled Land Area SSGS Comments: area appoximate after deletion of concrete area Area (m2): , Classification: 1 Selected Test: Sign Estimated Sigma (pCi/g): 0.3 DCGL (pCi/g): 4.30 Sample Size (N): 11 LBGR (pCi/g): 3.4 Estimated Conc. (pCi/g): 0.3 Alpha: 0.050 Estimated Power 1 Beta: 0.100 EMC Sample Size (N): 11 Scanning Instrumentation: Nal Prospective Power Curve

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• 1-beta Attachment 7-3 E900-05-014 COMPASS v1.0.0 31312005 Page 1

Appendix C Open Land Survey Design Revision 2

ORIGINAL SNEC CALCULATION COVER SHEET CALCULATION DESCRIPTION:.

Calculation Number Revision Number Effective Date Page Number E900-05-014 2 1 of 11 Subject SNEC Plant Area Open Land - OLI - Survey Design Question 1- Is this calculation defined as 'in QA Scope"? Refer to definition 3.5. Yes 0 No E]

Question 2 - Isthis calculation defined as a 'Design Calculation'? Refer to definitions 3.2 and 3.3. Yes ED No ]

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 Originator's immediate supervisor should not review the calculation as the Technical Reviewer.

DESCRIPTION OF REVISION 1 - Revision 1 adds the soils in the SSGS OL1-8 area. Text is changed and attachments added. The full revised text is provided, but only those attachments that have been added or revised are included here.

2- Revision 2 adds a new version of the fixed point sample layout for OL1 -11 as attachments 6-13 and 6-

14. Only the revised pages and the two new attachments are included here.

APPROVAL SIGNATURES Calculation Originator W. J. Cooper CHP /,Date Technical Reviewer B. Broseyl 3 Date 6 /O' Additional Review A. Paynterl Date Additional Review Date I

SNEC CALCULATION SHEET Calculation Number Revision Number Number E900-05-014 2 Page 5 of 11 Subject SNEC plant area open land - OLI - Survey Design

• coverage concerns (see Attachment 6-1 to 6-12 for VSP sampling point locations) 2.1.8 The starting points for physically locating sample sites in the survey unit are based on measurements from site grid pins or other evident markers (see diagrams on Attachment 6-1, 6-3, 6-5, 6-7, 6-9, 6-11 and 6-13).- Soil sampling points are positioned using coordinates developed from these markers and listed on Attachments 6-2, 6-4, 6-6, 6-8, 6-10, 6-12, and 6-14. Attachments 6-13 and 6-14 are to be used for OL1-1 1 in lieu of 6-7 and 6-8.

2.1.9 Because of the proximity to the RWDF and drum bunker, a biased sample location (BP-01) is placed in OLI-12 west of the line shack between the line shack wall and the fence.

2.1.10 Because of the potential for residual activity transfer through vehicle movement and post-shutdown topfill on the gravel, two biased samples locations (BP-02 and BP-03) are defined in the gravel areas north and south of the line shack in OL1 -12. See note below for sampling process for gravel areas.

2.1.11 A portion of the area of OL1-9 has a layer of old pavement underneath of a thin (4-6 inch) layer of soils. This area is indicated by the darker color on Attachment 6-3. The soil sample in this area should only be collected from the soils on top of the pavement. Cutting down through the pavement to obtain a deeper sample is not required. The soil will be removed after FSS of the soil so that the pavement can be separately surveyed under design E900-05-015.

2.1.12 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.

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

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

X-SNEC CALCULATION SHEET Caculation Number Revision Number Page Number E900-05-014 2 Page 9 of 11 subject SNEC plant area open land - OL1 - Survey Design 4.17 No additional sampling will be performed 1AW this survey design beyond that described herein.

4.18 SNEC she radionuclides and their individual DCGLw values are listed on Exhibit I of this calculation based on Table 5-1 of Reference 3.5.

4.19 The survey design checklist is listed in Exhibit 2.

4.20 Area factors are shown as part of COMPASS output (see Attachment 7-1) and are based on the Cs-1 37 area factors from the SNEC LTP.

5.0 CALCULATIONS 5.1 All calculations are performed internal to applicable computer codes or within an Excel (Reference 3.13) spreadsheet.

6.0 APPENDICES 6.1 Attachment 1-1, is a diagram of survey unit OL1. Attachment 1-2 through 1-7 are the grid layouts for the six OL1 open land survey units included in this design.

6.2 Attachment 2-1 to 2-4 is the DCGLw calculation logic and sample results from the OL1 and 0L2 areas in addition to the DCGL calculation sheets (decayed to January 15, 2004).

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/cm3 Cs-137 source term in a end-cylinder geometry.

6.6 Attachment 6-1 to 6-14, show the randomly picked scan locations (from VSP) and reference coordinates for the six OL1 .open land survey units included inthis design.

6.7 Attachment 7-1 is a COMPASS output showing the area factors used. Attachment 7-2 shows the variability used for all six survey units. Attachments 7-3 through 7-8, are the COMPASS output for the six OLI open land survey units included in this design, showing the number of sampling points in the survey unit, area factors, and prospective power.

6.8 Attachment 8-1 and 8-2, is the soil variability results from selected recent soil samples from the OL1 area. Attachment 8-3 is the general area Nal detector backgrounds measured on 3/8/05.

6.9 Attachment 9-1, is the results of the inspection report for the OL1 area.

OL1-1 Barrel Bunker Area Revision 6t16/OS N

Origin Pin AU126 AttocOtirh- 6'-I

' 17 Oo - O T-O I y

OL1-11 sample dimensions in METERS 6/16/05 X Coord Y Coord Label Grid Type East North 3.89 4.41 FP-1 AU126 Systematic 3.9 4.4 15.11 4.41 FP-2 AU125 Systematic 5.1 4.4 26.33 4.41 FP-3 AU124 Systematic 6.3 4.4 37.56 4.41 FP-4 AU123 Systematic 7.6 4.4 9.50 14.13 FP-5 AV126 Systematic 9.5 4.1 20.72 14.13 FP-6 AV125 Systematic 0.7 4.1 31.94 14.13 FP-7 AV123 Systematic 1.9 4.1 3.89 23.85 FP-8 AW126 Systematic 3.9 3.9 15.11 23.85 FP-9 AW125 Systematic 5.1 3.9 26.33 23.85 FP-10 AW124 Systematic 6.3 3.9 37.56 23.85 FP-1 1 AW123 Systematic 7.6 3.9 OL1-11 Fixed point Dimensions in FEET 6/16/05 X Coord Y Coord Label. Grid Type East North 12.74 14.47 FP-1 AU126 Systematic 12.7 14.5 49.56 14.47 FP-2 AU125 Systematic 16.8 14.5 86.37 14.47 FP-3 AU124 Systematic 20.8 14.5 123.18 14.47 FP-4 AU123 Systematic 24.8 14.5 31.15 46.35 FP-5 AV126 Systematic 31.2 13.5 67.96 46.35 FP-6 AV125 Systematic 2.4 13.5 104.78 46.35 FP-7 AV123 Systematic 6.4 13.5 12.74 78.23 FP-8 AW126 Systematic 12.7 12.6 49.56 78.23 FP-9 AW125 Systematic 16.8 12.6 86.37 78.23 FP-10 AW124 Systematic 20.8 12.6 123.18 78.23 FP-1 1 AW123 Systematic 24.8 12.6 Xcoord and Ycoord values are from the origin pin AU126 East and North are from each grid ID pin Attachment 6-14 E900-05-014

A

Appendix D COMPASS DQA Report Survey Unit OL1-8

DQA Surface Soil Report Assessment Summary Site: SSGS and SNEC Open land Planner(s): WJCooper Survey Unit Name: Backfilled Land Area SSGS Report Number 2 Survey Unit Samples: 18 -

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

0. 1

__ __ _ _ __ _ __ I-09

~ 0.8

" 0.7

= 0.6 :II -,--I1 _ _ _

I" 0.5

0.4

• i I _ _ _ _ _ _ _ _

0.3 I-I____ __ _

f c- 02

, 0.1 0 1 2 3 4 S Soil Concentation pCMfg), incluaing backgrouna

-. - Prospective Power

• 1-beta - H - Actual Power

- LBGR - - Estimated Power

- DCGL -- - Retrospective Power Appendix D OL1-8 711112005 Page 1 vl.0.0 COMPASS 01.0.0 711112005 Page I

%-JU DQA Surface Soil Report Survey Unit Data NOTE: Type =S" indicates sunrey unit sample.

Type = 'R" indicates reference area sample.

Sample Number Type Cs-137 (pCUg) 1 S 0.1 2 S 0.15 3 S 0.09 4 S 0.08 5 S 0.19 6 S 0.5

_-. 7 S 0.06 8 S 0.07 9 S 0.16 10 S 0.07 11 S 0.1 12 S 0.09 13 S 0.09 14 S 0.07 15 S 0.11 16 S 0.12 17 S 0.09 18 S 0.06 Basic Statistical Quantities Summary StatisUc Survey Unit Background DQO Results Sample Number 18 N/A N=1 1 Mean (pCVg) 0.12 N/A 0.32 Median (pCUg) 0.09 N/A N/A Std Dev (pC/g) 0.10 N/A 0.3 High Value (pC/g) 0.50 N/A N/A Low Value (pCi/g) 0.06 N/A N/A Appendix D OL1-8 COMPSS l.0. 7/1/205 Pge=

COMPASS v1.0.0 7/1 11200S Page 2

Appendix E COMPASS DQA Report Survey Unit OL1-9

DQA Surface Soil Report Assessment Summary Site: SSGS and SNEC Open land Planner(s): WJCooper Survey Unit Name: Open Land ARea CV OL1-9 Report Number 3 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 01 0.

I r-I

- l l1 e 09

= 0.8

' 0.3

.;i -I-

. I

& 0.6  : 11 1 ,

V! 0.5 . i!TiI.

I

-f 0.4

,I 03 _ _ _ _ _ __ _ _ _ _ I _

CZ 02 t, 0.1

._ _ I _

c 01 0 1 2 3 4 S Soil Concentration pCi/g), including background

- - Prospective Power U 1-beta - * - Actual Power

- LBGR - - Estirnated Power

- DCGL -- - Retrospective Power Appendix E OL1-9 COMPSS v.0.O7151005 age COMPASS v1.0.0 71512005 Page I

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

Type = 'R" indicates reference area sample.

Sample Number Type Cs-I 37 (pCUg) 1 S 0.07 2 S 0.08 3 S 0.09 4 S 1 5 S 0.11 6 S 0.14 7 S 0.26 8 S 0.13 9 S 0.12 10 S 0.11 11 S 0.45 Basic Statistical Quantities Summary Statistic Survey Unit Background DQO Results Sample Number 11 N/A N=1 1 Mean (pCig) 0.23 N/A 0.32 Median (pCVg) 0.12 NIA N/A Std Dev (pCUg) 0.28 NIA 0.3 High Value (pCig) 1.00 NIA NtA Low Value (pCig) 0.07 N/A N/A Appendix E OL1-9 COMPASS v1.0.0 715r2M0 Page 2

Appendix F COMPASS DQA Report -

Survey Unit OLl-10

DQA Surface Soil Report Assessment Summary Site: SSGS and SNEC Open land Planner(s): WJCooper Survey Unit Name: SNEC Yard Excavation After Backfill OLI-10 Report Number. 2 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

. Is . as

X I I I Cr

.: 1 i _ _ i I I -

C 0.6

.4zz _ _-

0.5

_ 0.4 .- . __ _ __.-

,; 0.6

. v1 _ _ __I-II_ =- i v 02 01

.i-- ____ - ___

03 0 l JEZ~__-_

0 1 2 3 4 Soil Concentration (pCifg), including backgrounw

-. - Prospective Power W 1-beta - - - Actual Power

- LBGR - - Estimated Power

- DCGL --- Retrospective Power Appendix F OLl-10 COMPASS v1.0.0 71512005 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 (pCUg) 1 S 0.33 2 S 0.17 3 S 0.17 4 S 0.31 5 S 0.25 6 S 026 7 S 0.12 8 S 0.21 9 S 0.25 10 S 0.06 11 S 1.3 Basic Statistical Quantities Summary Statistic Survey Unit Background DQO Results Sample Number 11 N/A N=1 1 Mean (pCVg) 0.31 N/A 0.32 Median (pCig) 0.25 N/A N/A Std Dev (pCig) 0.34 N/A 0.3 High Value (pCVg) 1.30 N/A N/A Low Value (pCVg) 0.06 N/A N/A Appendix F OL1-1 0 71512005 Page 2 COMPASS vI.0.0 COMPASS v1.0.0 715/2005 Page 2

Appendix G COMPASS DQA Report Survey Unit OL1-1 1

DQA Surface Soil Report Assessment Summary Site: SSGS and SNEC Open land Planner(s): WJCooper Survey Unit Name: Barrrel Bunker Area OLI-11 Report Number 2 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 S. 1 ra -I I ad 0.9

= 0.8

-DU.9

!I -

• , 05 3_ a .. I_

&0.4 i- 03 I_ _ _ __I_ _I_ _I _ _ _

H -_ _ _ _-

. 01 k:

4O I I I__

0 1 2 3 4 S Soil Concentration (pCi/g), including background

-. - Prospective Power

• 1-beta -fl- Actual Power

- LBGR - - Estimated Power

- DCGL -- - Retrospective Power Appendix G OLI-1 1 COMPASS v1.0.0 71512005 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 (pCUg)

I S 0.06 2 S 0.06 3 S 0.12 4 S 0.08 5 S 0.1 6 S 0.11 7 S 0.11 8 S 1.1 9 S 0.3 10 S 0.08 11 S 0.37 Basic Statistical Quantities Summary Statstic Survey Unit Background DQO Results Sample Number 11 NWA N=1 1 Mean (pCVg) 0.23 N/A 0.32 Median (pCiLg) 0.11 N/A NIA Std Dev (pC/g) 0.31 N/A 0.3 High Value (pCVg) 1.10 N/A NtA Low Value (pCVg) 0.06 NIA N/A Appendix G OL1-1 I COMPASS v1.0.0 7/512005 Page 2

Appendix H COMPASS DQA Report-Survey Unit OLI-12

DQA Surface Soil Report Assessment Summary Site: SSGS and SNEC Open land Planner(s): WJCooper Survey Unit Name: Line Shack Surrounding Area OLl-12 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 (Sufvey Unit PASSES)

Retrospective Power Curve I

. os c- r i -I I II _ _ _ i I 10 0.8

. I .

• 0.7

t. _ _

41-_ I: _ __ I__ L -__ _ __ _

C 0.5

.k.1 0 0.4 i! sC I _ _ _ _ _ _ _ _ .- - _

r- 03 c- 0.2 PC Q 0. 1 . !_ __

I'I_ I____

0 1 2 3 4 S Soil Concentration (pCi/g), izcluding background

- - Prospective Power

• 1-beta - * - Actual Power

- LBGR - - Estnated Power

- DCGL -- - Retrospectiye Power Appendix H OL1 -12 COMPASS V1.0.0 715r200 Page I

L/ DQA Surface Soil Report Survey Unit Data NOTE: Type = "S Indicates survey uni sample.

Type = 'R indicates reference area sample.

Sample Number Type Cs-137 (pCUg) 1 S 0.16 2 S 0.11 3 S 1.19 4 S 0.08 5 S 0.15 6 S 0.25 7 S 0.21 8 S 0.19 9 S 0.09 10 S 0.62 11 S 0.11 Basic Statistical Quantities Summary Statistic Survfey Unit Background DQO Results Sample Number 11 NIA N=1 1 Mean (pCVg) 0.29 N/A 0.32 Median (pCVg) 0.16 N/A NIA Std Dev (pC/g) 0.33 N/A 0.3 High Value (pCVg) 1.19 N/A NIA Low Value (pCVg) 0.08 N/A . N/A Appendix H OL1-12 COMPASS v1.0.0 715t2005 Page 2

Appendix I COMPASS DQA Report Survey Unit OLl-13

DQA Surface Soil Report Assessment Summary Site: SSGS and SNEC Open land Planner(s): WJCooper Survey Unit Name: South and West SNEC Yard Perimeter OL1-13 Report Number 1 Survey Unit Samples: 16 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 09 0.8 i, 0.7 t.4

, 0.6

• , 0.5

_0.4

,- 03 v1~ 02 I 0.1 C

0.0 0.5 1.0 15 2.0 25 3.0 35 4.0 45 5.0 Soil Concentmfron pCi/g), including background

- - Prospective Power

• I-beta -mu - Actual Power

- LBGR - - Estimated Power

- DCGL --- Retrospective Power Appendix I OLl -13 COMPASS v1.0.0 7/12005 Page I

e 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)

I S 0.25 2 S 0.09 3 S 0.08 4 S 0.3 5 S 0.4 6 S 0.55 7 S 0.54 8 S 0.36 9 S 0.19 10 S 0.12 11 S 0.12 12 S 0.08 13 S 0.12 14 S 0.11 15 S 0.08 16 S 0.08 Basic Statistical Quantities Summary Statistic Survey Unit Background DQO Results Sample Number 16 N/A N=1 t Mean (pCVg) 0.22 N/A 0.32 Median (pC/g) 0.12 N/A N/A Std Dev (pC/g) 0.17 N/A 0.3 High Value (pCUg) 0.55 N/A N/A Low Value (pCVg) 0.08 N/A N/A Appendix I OL1 -13 COMPASS v1.0.0 7/512005 Page 2