ML18205A420

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Westinghouse Hematite Decommissioning Project - Request for NRC Review of Final Status Survey Final Report Volume 3, Chapter 23, Survey Area Release Record for Land Survey Area 03, Survey Units 01 and 02, LSA-03-02 FSS Plan
ML18205A420
Person / Time
Site: 07000036
Issue date: 05/15/2017
From:
Westinghouse
To:
Office of Nuclear Material Safety and Safeguards
References
HEM-17-35
Download: ML18205A420 (24)
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{{#Wiki_filter:LSA 03-02, 9128t2015 PageP-l of8 HDP-PR-FSS-701, Final Status Survey Plan Development @evision 8) APPENDIX P-3 F'SS PLAN Survey Area: LSA 03

== Description:== West Open Land Area (Plant SEA) Survey Unit: 02

== Description:== Adjacent to South Site PondA.{orth Site Creek ("Area 5") Overuiew: The Survey Unit (SU) identified as LSA 03-02 has been prepared for Final Status Survey (FSS) by the Hematite Decommissioning Project GDP). This appendix provides an overview of the proposed FSS implementation as well as general and specific instructions for the technicians responsible for performing the FSS. o l)ata Quality Objectives

l. Personnel performing FSS duties meet the qualifications listed in HDP-PR-HP-102, Health Plrysics Technician Troining and have received training and instruction commensurate with their duties. The RSO has approved all FSS personnel to perform work associated with their individual roles and responsibilities. Training records are documented in accordance with HDP-PR-GM-020, Training Material Development and Documentation of Training.
2. All HDP FSS procedures ('0700 series") have been reviewed, revised, and validated in order to ensure performance of actual FSS work activities reflect the requirements detailed in the individual FSS Procedures and the HDP Decommissioning Plan.
3. All FSS instrumentation has undergone a receipt inspection by HDP QA personnel, is within current calibration, and is determined to be functioning within acceptable ranges based on initial set-up and daily source checks in accordance with HDP-PR-HP-4I1, Radiological Instrumentation. Prior to field use, HP technicians will confirm that environmental conditions (e.g. operating temperature range, no standing water) are acceptable for use of FSS instrumentation.

o Location LSA 03-02 is designated Class 2 and is situated between the between the south end of the Site Pond and the surrounding Class 3 LSA 03-01 to the west. This SU is located within the Plant Soil Surrogate Evaluation Area (SEA), therefore the Plant SEA DCGLs were used only for Scan MDC calculations where the inferred Tc-99 DCGL for U-235 is 2.5 pCr/g. The surrogate DCGL for U-235 was used for the calculation of Scan MDC only. Laboratory analysis for Tc-99 will be performed on all final status survey samples and as such, the adjusted U-235 DCGL values will not be used to demonstrate compliance with the final status survey dose criteria. The two-dimensional areal extent of LSA 03-02 is 2,553 m2. The soil sampling locations within the SU have been designed on a triangular grid pattern with a random start point. Since remedial excavation was not necessary for this SU, the interior surface area (three-dimensional) is not needed for the purposes of sidewall sampling requirements. o Background The West Open Land Area between the Site Pond and State Road P (LSA 03) was designated a Class 3 area as described in the Hematite Radiological Characterization Report and the DP. After issuance of the DP and the subsequent Request for Additional Information (RAI) process, occasional Quality Record Westinghouse Non-Proprietary Class 3 HDP Satellite Site View: Area 5 in Red Outline; LSA 03-02 in Red Crosshatching

LSA 03-02, 912812015 Page P-2 of 8 HDP-PR-FSS-701, Final Status Survey Plan Development @evision 8) APPENDIX P.3 FSS PLAN flood events prompted HDP to conservatively upgrade a 2,553 m2 section adjacent to the southwest edge of the Site Pond and northwest edge of the northern section of the Site Creek - this new Class 2 SU was designated LSA 03-02. No restoration is planned for this SU; therefore the current grade will be the final as-left grade. LSA 03-02 was subject to final Remedial Action Support Surveys (RASS) during late June/early July 2015. RASS included a 50Yo gamma walkover survey (GWS) and systematic sampling. Since this LSA is a Class 2 SU already surrounded by the site perimeter fence and the existing Isolation and Control (I & C) postings for the Site Pond, additional I & C measures are not necessary and will not be installed. Since LSA 03 which includes LSA 03-02 was Nuclear Criticality Safety (NCS) exempt, no NCS borings were performed. o Criteria All FSS analytical results for samples collected within LSA 03-02 will be evaluated against the Uniform Stratum DCGLs. FSS sampling is implemented using the Three-Layer CSM, however analytical results will be conservatively evaluated using the Uniform Stratum DCGLs. Three-Layer CSM DCGLs may be utilized for FSS data evaluation if necessary. Radionuclide l1: -. -t t, $*r; i ;,:;" 1 Uniform Stratum (nCi/s) j',r.;t'iit::r' i-,.

1,

" l i.;I: i:l:; lul;.r It i ,c,r ii i':.i : ;: t,l i;l :.r,:;* l",t i ii :, t: ,i:ii l':.1{.':ii.st Radium-226+C" 195.4 Technetium-99 51.6 Thorium-232+C" i. 168.8 Uranium-234 25.1 Uranium-235+D" 2.0 Uranium-238+Du 1.9 "Table adapted from HDP FSS Procedure HDP-PR-FSS-701 Final Status Sumey Plan Developnenr, Revision 8, August 2015. bThe reported DCGL.s are the activities for the parent radionuclide as specified and were calculated to account for the dose contribution from insignifi cant radionuclides. "+D indicates the DCGL* includes shortJived (halfJife < 6 mo.) decay products. d +C indicates the DCGL* includes all radionuclides in the associated decay chain. o Implementation LSA 03-02 will undergo a minimum 50Yo gamma walkover survey (GWS) using an uncollimated 2" x 2" sodium iodide (NaI) detector. The GWS within the SU should be judgmentally targeted toward the easterly edges of the SU near the boundary with the adjacent Class I LSAs (02-02,02-03). Based on a statistical evaluation of the RASS dataset, an eight (8) point grid was developed for LSA 03-02. All locations were systematically distributed on a triangular grid pattem with a random start point. Eight (8) surface stratum, eight (8) root stratum composite, and eight (8) excavation stratum samples will be taken at the eight random sample locations. However, the excavation stratum samples will be archived and analyzed only if the overlying root stratum sample at as given location exceeds a SOF of 0.5. Consideration of residual Tc-99 "hot spots": As is expected for a Class 2 SU, previous soil and sediment characterization data collected prior to FSS indicate that residual radioactivity concentrations in LSA 03 "West Open Land Area" (in which LSA 03-02 is located) are well below the DCGLs for all samples (Hematite Radiological Characterization Report GIRCR), Westinghouse Quality Record Westinghouse Non-Proprietary Class 3

LSA 03-02, 912812015 Page P-3 of 8 HDP-PR-FSS-701, Final Status Survey Plan Development (Revision 8) APPEIIDTX P.3 FSS PLAI\\ 20Ar. Therefore, there is little potential for areas of residual Tc-99 activity, and the eight (8)-point systematic sampling pattern is appropriate. A minimum of one biased sample will be collected at the maximum GWS measurement within the SU. Biased samples may also be collected during GWS at the discretion of the IIP Technician, after a statistical review (e,g. greater than 3o above mean) of the entire GWS dataset, or at the discretion of the FSS Supervisor. A minimum of one QC duplicate per SU (or 5o/o of the total number of samples) will be collected. Since the total number of samples is expected to exceed 20, two QC duplicate samples will be collected within LSA 03-02. Supplemental Sidewall Sampling: Supplemental sidewall sampling is not applicable since this is an unremediated Class 2 SU. FSS IMPLEMENTATION

SUMMARY

TABLE Westinghouse Non-Proprietary Class 3 Quality Record

LSA 03-02, 9128/2015 page p-4 of 8 HDP-PR-FSS-701, Final Status Survey Plan Development (Revision 8) APPENDD( P.3 FSS PLAIY Gamma Walkover Survey (GWS): Scan Coverage Minimum 50% of LSA 03-02totalarca Scan MDC 40.9 pCr/gtotal Uranium; 0.87 pCilg Th-232; l.2l pCilgRa-226 (based on a 10,000 cpm backsround)* Investigation Action Level (IAL) 1,624 net cpm ** Systematic Sampling Locations: Depth Number of Samole Comments These samples will be taken on a systematic grid. ***Excavation stratum samples will be collected and archived, but will be analyzed only in the event the overlying root sffatum sample exceeds a SOF of 0.5 0 - 15 cm (Surface) 8 l5 cm - 1.5 m (Root) 8 > l.5m (Excavation) 8**,1. Biased Survey/Sampling Locations: Collect a minimum of one biased sample at the maximum GWS measurement within the SU. Biased samples may be collected during GWS at the discretion of the F{P Technician, after statistical analysis of the survey data, or at the direction of the FSS Supervisor. Sidewall Sampling Locations: Supplemental Sidewall Sampling: Not applicable; SU is an unremediated Class 2 area. Instrumentation: Ludlum 2221 with 44-10 (2y2 NaI) detector Used for GWS and to obtain static count rates at biased measurement locations.

  • Values based on information provided in HDP-TBD-FSS-002, "Evaluation and Documentation of the Scanning Minimum Detectable Concentrations (MDC) for Final Status Surveys (FSS).

The Scan MDC for total Uranium reflects a conservative assumption of 4%o enrichment. The actual RASS enrichment (1.5%) would result in Scan MDC values slightly less than those calculated for FSS planning purposes.

    • IAL is the net count per minute (ncpm) equivalent of an activity concentration less than the Uniform Stratum DCGLy derived from the technical bases presented in HEM-MEMO-15-021 and HDP-TBD-FSS-003 *Modeling and Calculation of Investigative Action Levels for Final Status Soil Survey Units", Westinghouse, March 2015.

Quality Record Westinghouse Non-Proprietary Class 3

LSA 03-02, 9/2812015 Page P-5 of8 HDP-PR-FSS-701, Final Status Survey Plan Development (Revision 8) APPENDIX P-3 FSS PLAN General Instructions:

l. Summarize daily work activities on the log sheets provided in Appendix P-6. Provide a description of site conditions, samples collected and the status of gamma walkover surveys for every shift that involves work in this survey unit. Document the surveyor name and instrumentation used for each GWS event (i.e., data file) in Appendix P-6 for reporting traceability. In the event that a situation arises where the survey instructions cannot be followed as written, stop work and contact the FSS Supervisor for resolution. All changes to the survey instructions shall be approved by the RSO before continuing work and be documented in the FSS Field Log.
2. tn accordance with HDP-PR-FSS-701, Final Status Survey Plan Development (Sec. 8.4.2),

documentation of activities performed, equipment used, and potential safety hazards that may be encountered during the performance of characterization activities (along with associated controls) will be documented using the FSS Daily Task Briefing log sheet.

3. Since this LSA is a Class 2 SU and is already surrounded by the site perimeter fence and the existing Isolation and Control (I & C) postings for the Site Pond, additional I & C measures rre not necessary and will not be installed.
4. Perform daily pre and post QC source checks in accordance with HDP-PR-HP-416.
5. A minimum 50o/o gamma walkover survey (GWS) of the total SU area will be performed using a2"x2" NaI (Tl) detector. Move the survey probe in a serpentine pattern approximately 6-inches off-set from centerline to the body (e.g., "shoulder-to-shoulder") with the probe as close to the surface as possible; maintaining the detector as close as possible to the surface (nominally 1", but not to exceed 3-in.

distance from the surface). The meter will be moved at a speed of approximately 0.3 meter (or 1.0 feet) per second or less. The gamma walkover survey will cover the percentage of the accessible surface areas within the area of interest as indicated in the table above. Notiff the FSS Supervisor of any areas, conditions or constraints where surveying (or subsequent sampling) may not be possible. Document the conditions and any resolutions in the FSS Field Log.

6. A GPS system and data logger should be interfaced with the meter. The downloaded information will then be used to prepare maps illustrating relative count rates and to perform statistical analysis of the data. If a GPS data logging system is not available, contact the FSS Supervisor to determine specific instructions for performing and documenting gamma walkover surveys.
7. LSA 03-02 is a Class 2 Survey Unit. Each sample location was systematically distributed and has associated GPS coordinates specified. In the case of inaccessible sampling locations, additional sample coordinates may be generated with the FSS Supervisor's and RSO's approval in order to identifu an acceptable sampling location.
8. A map of the survey unit showing predetermined sample locations with associated GPS coordinates will be generated. A copy of the sample map and survey locations will be attached to the survey instruction.
9. At each systematic soil sampling location, a composite soil sample will be collected from each location and depth as determined after the completion of excavation (and will be provided in Appendix P-4). The random sample locations will include eight (8) samples taken at a depth of 0 - 15 cm (surface), eight (8) samples collected at a depth of 15 cm - I.5 m (root), and 8 (eight) samples collected at a depth of 1.5 m to 1.65 m (excavation). The excavation stratum samples will be analyzed only if the overlying root stratum sample in a given location exceeds a SOF of 0.5.
10. Biased soil sampling locations may be determined at the discretion of the HP Technician during the performance of the GWS. Biased soil sampling locations may also be determined at the discretion of the FSS Supervisor based on statistical analysis of the survey/sampling data or process/historical knowledge Quality Record Westinghouse Non-Proprietary Class 3

LSA 03-02, 9/28/2015 Page P-6 of 8 HDP-PR-FSS-701, Final Status Survey Plan Development (Revision 8) APPENDD( P.3 FSS PLAI{ of the area. Biased soil samples will be collected in a manner similar to systematic soil sampling locations. The Radiological Engineer and/or the HP Technician will log the reason for collection of biased samples in the Field Log sheet and record the location of biased samples on Appendix P-4 of this survey instruction. NOTE: If trash, waste, or other non-native materials are observed during sample collection, stop sampling activities and notify IIP Supervision (or Radiological Engineering) before collecting samples at any sample location in the unit. 1 1. Supplemental Sidewall Sampling: Not applicable to this SU.

12. All samples collected as part of this survey will be analyzed at an off-site laboratory by gamma spectroscopy for radium, thorium, and uranium, and ICP-MS for Tc-99.

Specific Instructions: NOTE: Unless otherwise indicated, the performance of these specific instructions is the responsibility of the FIP Technician. Before Beginning Work

1. Rad. Engineer/IlP Technician: Verifu each shift that isolation controls (not applicable for LSA 03-02), established in accordance with HDP-PR-HP-602, are in place prior to the start of FSS using the Daily Task Briefing log sheet.
2. Rad. Engineering/IlP Technician: Prior to gamma walkover survey in the area to be surveyed, walk the area looking specifically for any debris material (e.g. asphalt, plastic, concrete, etc.) that may indicate further investigation is necessary.
3. Rad. Engineer/IlP Technician: Perform a daily task-specific briefing; documenting the attendants, planned work activities, anticipated hazards, and controls on the FSS Daily Task Briefing log sheet.

NOTE: If soil sampling to a depth greater than one foot is required, ensure HDP Safety & Health is aware of the activity, an Excavation Permit (Form IIDP-PR-EI{S-021-1) has been performed for the work area, and underground utilities have been identified and marked. Gamma Walkover Surveys (GWS)

1. Establish a general area background, in accordance with HDP-PR-FSS-71 1. Use this background level in conjunction with the Investigation Action Level (IAL) of 7,624 net counts per minute as a field guide to pause and, if necessary, flag locations for possible biased sampling (see following Steps 2 and 3 below for details).
2. Perform a gamma walkover of the survey unit holding the probe as close to the surface as possible (nominally 1", but not to exceed 3"), in accordance with HDP-PR-FSS-711. Preferentially perform GWS in the eastem section of the SU (near the boundary with Class I LSAs 02-02 and 02-03).
a. Look and/or listen for elevated count rates and then pause to determine locations that exhibit anomalous readings (e.g., count rates that exceed the IAL for this unit).
b. Mark the location(s) exhibiting anomalous readings to facilitate possible future investigations (for example, use a flag, stake, or other marking resistant to anticipated environmental conditions).
3. At each location where anomalous readings occur, perform a more detailed point survey of the area.

Pause and place the survey probe as close as possible to the surface to define and record the total count rate associated with the area of interest on the Field Log. Quality Record Westinghouse Non-Proprietary Class 3

LSA 03-02, 9t2812015 Page P-7 of 8 4. HDP-PR-FSS-701, Final Status Survey Plan I)evelopment (Revision 8) APPENDIX P.3 FSS PLAI\\ NOTE: If field conditions limit the ability to perform contact readings, collect readings as close as practical. Contact the FSS Supervisor (or Radiological Engineering) regarding the issue for each location. The FSS Technician, FSS Supervisor, and/or Radiological Engineer will log the issue (and resolution) for each Iocation in the FSS Field Log and on applicable HDP survey forms. GPS (and associated data logger) is the preferred method for performing GWS. When a GPS and data logger is used, download and provide the survey data to a GIS Specialist.

a. GIS Specialist: Provide colorimetric maps indicating survey coverage and measurements exceeding the IAL and send the survey data to the FSS Supervisor.
b. FSS Supervisor: Provide statistical analysis to determine population characteristics of the survey data set and identif,i any areas requiring additional surveys or sampling. Contact FSS Technician to mark additional locations requiring survey or sampling.

If a GPS and data logger cannot be used to perform GWS in any portion of this survey unit, the FSS Technician will contact the FSS Supervisor and RSO to determine compensatory survey methods. The FSS Supervisor will log the compensatory methods in the FSS Survey Log. Download the survey dataat the end of each shift. To minimize data loss, periodically save the GWS data set to backup drive(s). Soil Sampling Collect soil samples in accordance with HDP-PR-FSS-71I at locations identified in Appendix P-4. Note that additional biased sampling locations may also be listed as determined by the GWS or as determined by the FSS Supervisor. Any adjustments to sampling locations will be documented in the FSS Field Log. Collect a minimum of one duplicate sample for every 20 samples. Two duplicate samples are required for LSA 03-02. Collect and homogenize the entire volume from the specified depth interval prior to containerizing the sample. Vegetation and native debris/rocks with a diameter greater than I inch should be discarded. NOTE: If a discrete source of radiation (e.g., a fuel pellet) is discovered during the performance of sampling activities, contact the FSS Supervisor who will then notifu the RSO. Pause any additional characteization work in the immediate area and use a plastic bag to contain the material. Label the plastic bag per HDP-PR-HP-201, Section 8.2 "Labeling Radioactive Material" and transfer the material from the survey unit for controlled storage in the Building230 Sample Cage via physical turnover to the shift Sample Custodian. Monitor the count rates observed at all accessible surfaces within close proximity (e.g., 2 meter diameter) of each biased sampling location, as practical. Note any accessibility issues and discuss compensatory measures with supervision. Collect biased samples from the surface to a depth of 6 inches. Collect a minimum of one biased sample at the maximum GWS measurement location. Monitor the count rates within the depression created by the collection of biased soil samples. Inform the FSS Supervisor of the results obtained at monitored biased sample locations. Depending on the results, subsequent actions may include further investigation or additional remediation. Obtain and record the count rate on contact with features other than soil within the excavation. (e.g., native rock). Record the nature and extent of features other than soil found within the excavation in the l. 2. J. 4. 5. 6. 7. Quality Record Westinghouse Non-Proprietary Class 3

LSA 03-02, 9/28t2015 Page P-8 of8 HDP-PR-FSS-701, Final Status Survey PIan Development (Revision 8) APPENDIX P.3 FSS PLAN FSS Survey Log and contact the FSS Supervisor to determine additional characterization methods, if necessary.

8. Submit samples for analysis to TestAmerica following sample chain of custody requirements contained in HDP-PR-QA-006.

Prepared by: Brian A. Miller Q l>,1,+ (PrintName) (Date) qlu I,5 Peer Reviewed by: Ellen!,.{4\\q! Approved by (RSo): (PrintName) W. Clark Evers (PrintName) (Signature) (Signature) (Date) Quality Record Westinghouse Non-Propietary Class 3

Hematite I Procedure: HDP-PR-FSS-701, Final Status Survey Plan Development Westinghouse Non-Proprietary Class 3 Appendix P-1, Page I of 9 APPENDIX P.l FINAL STATUS SURVEY SAMPLING PLAN DEVELOPMENT CHECKLIST FOR SOIL SURVEY UNITS Survey Area: LSA 03 Survey Unit: 02

== Description:== Plant Area Open Land Area

== Description:== Class 2 LSA, west of Site Pond in "Area 5"

1. Veriff Survey Unit Isolation & Control Survey Unit properly isolated and/or controlled (indicated by outlining the area with green rope and posting the appropriate signage) as required by HDP-PR-HP-602, Data Package Development and Isolation and Control Measures to Support Finol Status Survey?

YesE NoX*

  • Since this LSA is a Class 2 SU and is already surrounded by the site perimeter fence and the existing Isolation and Control 0 A C) postings for the Site Pond, additional I & C measures are not necessary and will not be installed.

(If 'No", discontinue survey design until area turnover requirements have been met.)

2. Evaluate Final Remedial Action Support Suruey (RASS) Data Number of RASS Samples: 8 Record analytical results and
c. Are all RASS results less, or equal 701?

to the appropriate DCGLry from Appendix A of HDP-PR-FSS-

d. If "No", have remaining locations of elevated concentration been

([f o'No", discontinue survey design until investigation is complete.) YesX NoE evaluated? N/AX YesE NoE

e. Have elevated areas identified by gamma walkover surveys been investigated? N/AX Yesf Nof (If "No", then terminate survey design and perform additional investigation and repeat the planning process.)
f. Are the Initial Characterization and RASS data sufficient to support FSS Design? Yes[ NoE (If 'No", terminate survey design, perform additional characterization or remediation and repeat the planning process.)
3. Define the Survey Unit Classification Write a short description of the survey unit based on historical use and remedial activities:

The LSA 03-02 survey unit (SU) is classified as MARSSIM Class 2. LSA 03-02 is located directly west of the southern end of the site pond in the western end of the HDP. This SU along with LSA 03-01, LSA 01-01, LSA 0l-02, LSA 02-01, LSA 02-02, and LSA 02-03 are collectively referred to as 'oArea 5" for the LSA 03-02,91t6115 for a. b. results staflstrcs each RASS sam u-234 (oCi/s) u-235 /pCtls.\\ u-238 (pCi/e) Te-99 (oCi/si) Th-232 (oCi/s) Ra-226 (oCi/s) Minimum 1.390 0.073 0.784 O (<BKG) O (<BKG) O (<BKG) Maximum 2502 0.1 35 1.270 0.094 0.230 0.070 Mean 1.808 0.095 t.024 0.043 0.111 0.018 Median 1.682 0.087 1.035 0.042 0.115 0.000 Standard Deviation 0.378 0.02t 0.176 0.034 0.084 0.032

  1. of Samoles 8

8 8 8 8 8

Hematite I Procedure: HDP-PR-FSS-701, Final Status Survey Plan Development Westinghouse Non-Proprietary Class 3 Revision: 8 Appendix P-1, Page 2 of 9 APPENDIX P-l FINAL STATUS SURVEY SAMPLING PLAN DEYELOPMENT CHECKLIST FOR SOIL SURVEY UNITS purposes of remediation planning and work sequencing. Area 5 is primarily a wooded and grassy area. There has been no documented evidence of any radioactive materials being stored, buried, or handled within the LSAs comprising Area 5. Classification: 2 Survey Unit Area 1m21:2,553

a. Has the Classification changed from the Initial Classification as indicated in DP Ch. 14 Table 14-16 and Figures 14-14 through 14-t7?

YesX NoE (If "Yes", then include a copy of Appendix P-5, Survey Unit Classification Change Form.)

b. Is the Survey Unit area less than the maximum size for the Classification?

YesX NoE (If "No", then terminate survey design and evaluate dividing the survey unit into multiple survey units.)

4. Define the Surrogate Evaluation Area (SEA)

Select the appropriate SEA as input to calculating scan sensitivity and variability in the RASS SOF. Plant Soils SEA X Tc-99 SEA E Burial Pit SEA E

5. Define Final Survey Unit Conditions X No Excavations, Paved/Partially Paved or Excavated but not Backfilled Excavated and to be Backfilled f

Excavated and Backfilled Note: If a portion of a Survey Unit is paved, then Surface Soil Stratum begins at the bottom of the paved surface and extends 15 cm from that point below grade. The lower depth of the Root Stratum remains at 1.5 m below grade. The pavement is then treated as a separate structural Survey Unit within the Survey Area.

6. Define the Type of FSS Samples and Measurements Select the appropriate types of samples and measurements for FSS of this Survey Unit that corresponds to the final condition and survey classification of the Survey Unit.

Not Excavated. Paved/Partially Paved or Excavated but not Backfilled: X Surface Soil (<15cm) Samples. X Root Stratum Soil Samples composited from 15cm to 1.5m. Excavated and to be Backfilled: Surface Soil Samples taken from any remaining surface soil Stratum and Root Stratum Soil Samples taken at the same locations as Surface Samples, composited over the entire root stratum. Root Stratum Soil Samples composited from exposed grade to l.5m and Deep Stratum Soil Samples taken at the same locations as Root Samples of the top 15cm of the Deep Stratum. LSA 03-02,91t61t5 n tr

Hematite Decommissioning Project Procedure: HDP-PR-FSS-701, Final Status Survey Plan Development Westinghouse Non-Proprietary Class 3 Revision: 8 Appendix P-l, Page 3 of 9 APPENDIX P.l FINAL STATUS SURVEY SAMPLING PLAN DEVELOPMENT CHECKLIST FOR SOIL SURVEY UNITS X Deep Stratum Soil Samples of the top 15 cm n Deep Stratum Soil Samples of the top 15 cm of the of the Deep Stratum. (Analyzed if the Root exposed Deep Stratum. Stratum sample SOF > 0.5.) Note: If the SOF of the Root Stratum sample exceeds 0.5, a composite sample is collected from 1.5 meters to an appropriate depth (Deep Stratum). Excavated and Backfi lled tr Core through backfill layer to the lowest point where remediation occurred and composite a sample from a coring that extends one meter deeper than the lowest point where remediation occurred.

7. Define Derived Concentration Guideline Levels (DCGL)

Select the appropriate DCGL for each Radionuclide of Concern (ROC) based on the corresponding SEA and the Uniform Conceptual Site Model (CSM). o If Tc-99 was measured during the characterization/RASS survey, then the "Measure Tc-99" DCGLs will be used from Appendix A of HDP-PR-FSS-701. o If Tc-99 was not measured in the characterization/RASS survey, then the modified U-235 DCGL ("Infer Tc-99") will be used from Appendix A HDP-PR-FSS-701.

l. The Deep Stratum DCGLs correspond to the Excavation Scenario DCGL from Appendix A of HDP-PR-FSS-701.
8. Determine the Number of Samples in the Statistical Survey Population Note: The statistical survey population is routinely derived based on the Uniform DCGL.

o Alternatively, if the Survey Unit excavation extends into multiple CSMs (e.g. surface, root & deep), then the DCGL(s) from the most limiting strata can be used with the equations below; OR o If the excavation significantly extends into the Deep Stratum, then the alternate approach presented in Step 8.2.5 of HDP-PR-FSS-701 may be used for determining the mean SOF and weighted standard deviation that accounts for the reduced dose from the deeper surface, i.e., by LSA 03-02,9ll6lt5 Surface Stratufi (pCi/e) Root Stratum ',,'(,oCile) Deep Stratum ' (pCila) Unifonn '(oCils) u-234 195.4 u-235 51.6 u-238 r68.8 Tc-99 2s.1 Th-232 + C 2.0 Ra-226 + C 1.9

Hematite I Procedure: HDP-PR-FSS-701, Final Status Survey Plan Development Appendix P-l, Page 4 of 9 Revision: 8 Westinghouse Non-Proprietary Class 3 APPENDIX P.l FINAL STATUS SURVEY SAMPLING PLAN DEVELOPMENT CHECKLIST FOR SOIL SURVEY UNITS weighting the Root Stratum and Excavation DCGLIy values. o The values used in determining the following (SOF."un trnd osor) can be found in the tables from Section 2b and Section 7.

a. Determine a mean SOF for the characterization/RASS survey data set using the equation from Step 8.2.5a of HDP-PR-FSS-70 I.

Lower Bound of the Grey Region (LBGR) : SOFy.-:0.08

b. Determine the weighted standard deviation in the SOF for the characterization/RASS survey data set using the equation from Step 8.2.5b of HDP-PR-FSS-701.

Note: For the determination of SoFrraea,, and osop, include the concentration for Tc-99 if it was measured. If Tc-99 was not measured, include the modifiedU-235 DCGL and omit Tc-99 concentration term. / Larger of the two used in worksheet survey design Survey Unit osor: 0.05 tr Background osor': 0.14 X

c. Define the Decision Errors.

Type I Error:0.05 Type II Error = 0.10 Note: The Type II Error is set at 0.10 initially but it may be adjusted with RSO concurence.

d. Determine the Relative Shift using the equation in Step 8.2.5d of HDP-PR-FSS-701.

Relative Shift: 6.5*

  • Spreadsheet value may diffbr from hand-calculated results due to rounding.
e. Is the Relative Shift between 1 and 3?

Yesf] NoX o If "Yes", then continue to Step 8f. o If ooNo", then adjust the LBGR as necessary to achieve a relative shift between I and 3. In order to accomplish this, the LBGR may be set as low as the MDC for the analytical technique. Adjusted LBGR: 0.58 Adjusted Relative Shift : 3.0

f. Determine the Number of Samples (N/2) required corresponding to the Type I error, Type II Error and the Relative Shift from Appendix F or calculate using equation 5-l from MARSSIM.

No. of Samples (N/2):8

9. Determine the Scan MDC for Total Uranium

. When U-235 is reported as negative or zero and U-238 is reported as positive, set the sample enrichment to 0.72oh (natural uranium). LSA 03-02,9116115

Hematite Decommissioning Project Procedure: HDP-PR-FSS-701, Final Status Survey Plan Development Westinghouse Non-Proprietary Class 3 Revision: 8 Appendix P-l, Page 5 of 9 APPENDIX P.l FINAL STATUS SURVEY SAMPLING PLAN DEVELOPMENT CHECKLIST FOR SOIL SURVEY UNITS o When U-235 is reported as positive and U-238 is reported as negative or zero, set the sample enrichment to 100% (highly enriched). o When both U-235 and U-238 data are reported as positive, determine the U-2384J-235 rutio for each sample and use Appendix G of HDP-PR-FSS-701, to determine the uranium enrichment that corresponds to the mean U-238:U-235 ratio.

a. Record the average Uranium enrichment for the survey unit using the enrichment determined for each individual sample.

Average Enrichment (%) : 1.5 Note: The Activity Fractions (,f ) for each radionuclide corresponding to the mean enrichment used in the following calculations is obtained from Appendix G of HDP-PR-FSS-701. If the Uniform DCGL is not used, and the excavation extends into multiple CSMs (e.g. surface, root & deep), then the most conservative DCGLs should be used in the following calculation.

b. Determine a DCGLw for Total Uranium using the equation from Step 8.2.6b of HDP-PR-FSS-701.

DCGLwrotu for Total Uranium : 55.2 pCilg

c. Identify the Radiological Instrument that will be used for scanning.

N 2"x 2" NaI Detector tr FIDLER NaI Detector tr other

d. Determine the Scan MDC for the selected instrument using the equation in Step 8.2.6d of HDP-PR-FSS-701 or the calculations presented in the Open Land Area Gamma Scan MDCs section in Chapter 14 of the DP.

MDCsca,, for Total Uranium: 40.9 pCilg

10. Determine the Scan MDC forTh-232 and Ra-226
a. Select the appropriate DCGLw for Th-232 and Ra-226 corresponding to the soil strata that will be exposed at the time of FSS and the SEA where the survey unit is located.

Th-232 DCGLw : 2.0 pCr/g Ra-226 DCGLw : 1.9 pCilg Note: If the Uniform DCGL is not used, and the excavation extends into multiple CSMs (e.g. surface, root & deep), then the most conservative DCGL for the strata should be used. With RSO concurrence, the alternate approach as presented in DP Ch. 14, Section 14.4.3.1.10 may be used in lieu of using the most conservative.

b. Determine the Scan MDC for the selected instrument Note: HDP-TBD-FSS-002 documents the calculated MDCrr* of 0.87 pCi/g for Th-232 and I.21 pCilg for Ra-226 when using a2"x 2" NaI detector with a background of 10,000 cpm. If a different background is indicated, see Appendix C of HDP-TBD-FSS-002 for the appropriate MDCs"an.

Note: If the selected instrument is not a 2"x 2" NaI detector, then the MDCsca,, can be determined in accordance with the Open Land Area Gamma Scan MDCs section in DP Ch. 14. LSA 03-02,9116115

Hematite I Procedure: HDP-PR-FSS-701, Final Status Survey Plan Development Westinghouse Non-Proprietary Class 3 Revision: 8 Appendix P-l, Page 6 of 9 APPENDIX P.l FINAL STATUS SURVEY SAMPLING PLAN DEYELOPMENT CHECKLIST FOR SOL SURVEY UNITS MDCr.a,., for Th-232 : 0.87 pCilg MDC.cn, for Ra-226 : l.2l pCilg Note: If a value is not applicable, mark as N/A.

11. Adjust the Statistical Sample Population Size (N/2) for Scan MDC
a. Is the Scan MDC for the selected instrument less than the DCGLry that was determined for Total Uranium? (compare values from Step 9b and 9d)

YesX NoI Class 2 and 3 survey units - If "Yes", then proceed to Step 12, if oNo", then contact the RSO for direction as to changing parameters for scanning such as scanning speed, detector distance, different instrumentation, etc. Class 1 survey units, proceed to the next step.

b. Divide the total area of the survey unit by the Number of Samples Qrl/2) determined in Step 8f to determine the area bounded by the statistical sample population.

Area Bounded by the Statistical Sample Population (Asu) : NA ^' URANIUM

c. Was the Scan MDC for the selected instrument less than the DCGLyy that was determined for Total Uranium in Step I 1.a?

NAX YesE Nof (If "Yes", then proceed to Step 12, if 'No", then proceed to the next step).

d. Using the Area Factors in Appendix H of HDP-PR-FSS-701 and using the equation from Step 8.2.8d of HDP-PR-FSS-701, determine a Total Uranium AF for each listed area using the Activity Fractions

(/) for each radionuclide that corresponds to the mean enrichment from Appendix G of HDP-PR-FSS-70r. Note: The AFs for the Uniform Stratum will generally be used. The RSO may approve use of AFs from the Surface, Root or Deep CSMs, or the Excavation Scenario.

e. Find the Area Factor (AF1o1a1u) determined in the previous step that corresponds to the area bounded by the statistical sample population (Asu).

AFrotu for the Bounded Area (A5u) : NA

f. Multiply the DCGLw determined for Total Uranium by the Area Factor (AFro,u) to derive a DCGLErrac for Total Uranium.

DCGLeuc for Total Uranium : NA pCilg

g. Is the MDC.ca, for the selected instrument less than the DCGLErrac that was determined for Total Uranium?

NAX YesE NoE LSA 03-02,91t6115 Area (m") r53,375 10,000 3,000 1,000 300 100 30 10 aJ I AFro,rtt.l NA NA NA NA NA NA NA NA NA NA

Hematite I Procedure: HDP-PR-FSS-701, Final Status Survey Plan Development Westinghouse Non-Proprietary Class 3 Revision: 8 Appendix P-l, Page 7 of 9 FrNAL srArus suRvEy r"*r*iPJlHI ilirr"opMENr cHECKLrsr FoR SOIL SURVEY UNITS (If "Yes", then proceed to Step llk, if "No", then proceed to the next step.)

h. Determine a new AF (AFeuc) corresponding to the MDCr.r, for the selected instrument by dividing the MDC,.* by the DCGLw.

AFel,ac for U1o61 : NA

i.

Find the Area (A') that corresponds to the Area Factor (AFEruc). A' for Utota : NA

j.

Determine an Adjusted Number of Samples Clrr'ac) for the statistical sample population size that corresponds to the bounded Asvcusing the equation from Step 8.2.7j of HDP-PR-FSS-701. Nstrc corresponding to A' for U1s1al : NA TECHNETIUM (Tc-99)

k. Determine if the maximum reasonable result for Tc-99 from previous Characterization or RASS remaining within the area is greater than the DCGLry for the appropriate CSM and SEA?

N/AX Yes[ NoE (If o'No", then proceed to Step 12, if "Yes", then proceed to the next step.)

l.

Determine the area per sample station needed to account for potential Tc-99 hotspots by dividing the highest Tc-99 result obtained by the Tc-99 DCGLry for the appropriate CSM and compare that value to the Area Factor Tables in Appendix H. A' for potential Tc-99 hotspots: NA

m. Determine the number of samples needed by dividing the Asy by the A' for potential Tc-99 hotspots determined in Step 111.

N corresponding to A' for potential Tc-99 hotspots : NA

12. Determine the Grid Spacing
a. Larger of N/2 from Step 8f, the maximum value of Nsryr6 from Step 1lj, or N corresponding to A' for potential Tc-99 hotspots from Step l lm.

N/2, Nruc[max], or N corresponding to the potential Tc-99 hotspot : 8

b. Is the Survey Unit a Class 3 Survey Unit?

YesE NoX (If "Yes", then continue to Step 13, if 'No", then proceed to the next step).

c. Determine Grid Spacing (L) using the equation from Step 8.2.9 of HDP-PR-FSS-701.

Grid Spacing (L) for Survey Unit: 19.1 m

13. Generate a Survey Map
a. Assign a unique identification number to each sample in the statistical sample population using the LSA 03-02,9116115

Hematite I Procedure: HDP-PR-FSS-701, Final Status Survey Plan Development Westinghouse Non-Proprietary Class 3 Appendix P-1, Page 8 of 9 APPENDIX P.l FINAL STATUS SURVEY SAMPLING PLAN DEVELOPMENT CHECKLIST FOR SOIL SURVEY UNITS guidance and direction provided in Appendix M of HDP-PR-FSS-701.

b. Generate a graphic representation of the Survey Unit with dimensions and boundaries corresponding to the established reference coordinate system in accordance with Step 8.2.10 of HDP-PR-FSS-701.
c. Using the reference coordinate system, ascertain coordinates for each sample location.
d. Designate sample locations, and location coordinates on Appendix P-4, FS,S Sample & Measurement Locations & Coordinotes and attach a copy of that form to the FSSP.
e. Attach a copy of the developed Survey Map with sample locations to the FSSP.
14. QC, Biased & Discretionary Samples
a. Randomly choose 5oh of the statistical sample population as QC samples in accordance with HDP-PR-FSS-703, Final Status Survey Quality Control.
b. Designate QC sample locations, and location coordinates on attached Appendix P-4, FS',S Sample

& Measurement Locations & Coordinates.

c. Designate if any biased samples will be taken at the discretion of the HP Staff designing the survey and the basis for taking them. Necessary biased samples will be explained on Appendix P-3, FS',S Sampling Plan.
d. Using the reference coordinate system, determine coordinates for each biased sample location.
e. Designate biased sample locations, and location coordinates on attached Appendix P-4, F,S,S Sample &

Measurement Locations & Coordinates.

f. Include discretionary sidewall samples as applicable using guidance in Step 8.2.11. Are discretionary sidewall samples required?

(If "No", then proceed to Step 15, if "Yes", then proceed to the next step.) N/AE Yestr NoX

g. Determine the number of samples to be collected based on the sidewall surface area compared to the two dimensional systematic surface area.

Number of discretionary sidewall samples : 0 (maximum); may be reduced with FSS Supervisor approval if the actual sidewall surface area is significantly less than the CAD-calculated theoretical maximum.

h. Any discretionary sidewall samples will be taken at randomly chosen location(s) of the sidewall(s) (i.e.,

not based on radiological scans) selected at the discretion of the Health Physics Technician performing soil sampling. Necessary sidewall samples will be explained on Appendix P-3, FSS Sampling Plan.

15. Scan Coverage
a. The Survey Unit is:

E Chss 1 X Class 2 l) Class 3 LSA 03-02,9116115

Hematite I Procedure: HDP-PR-FSS-701, Final Status Survey Plan Development Westinghouse Non-Proprietary Class 3 Revision: 8 Appendix P-1, Page 9 of 9 APPENDIX P-l FINAL STATUS SURVEY SAMPLING PLAN DEVELOPMENT CHECKLIST FOR SOIL SURVEY UNITS

b. Based on the Survey Unit Classification, the scan coverage in this Survey Unit is; f]

IOO% Scan Coverage of exposed soil [] tO-tOO7o Scan Coverage of exposed soil

c. Designate any specific scan locations, as determined necessary, on Appendix P-3, FSS Sampling Plan.
16. Investigation Levels
a. The Survey Unit is: !

Class 3

1) Scan Investigation Levels are set at: NA cpm
2) Sample Investigation Levels are set at 50%o of the DCGLry when expressed as the SOF.
b. The Survey Unit is: X Chss 2
1) Scan Investigation Levels are set at:

I,624 net cpm

2) Sample Investigation Levels are set at the DCGLry when expressed as the SOF.
c. The Survey Unit is: f Class 1
1) Scan Investigation Levels are set at: NA cpm
2) Sample Investigation Levels are set at the DCGLy when expressed as the SOF.
17. Attachments Attach a copy of completed forms as appropriate:

I Appendix P-3, FSS Survey Sampling Plan, I Appendix P-4, FSS Sampte & Measurement Locations & Coordinates ffi Appendix P-5, FSS Unit Classification Change Form f Appendix P-6, FSS Field Log I Survey Unit Figure f, other:

18. FSSP Development Checklist Approval Prepared by:

W\\ qbol,e Ellen C. Jakub (Print Name) Brian A. Miller (Print Name) W. Clark Evers (Print Name) (Date) 1bol,,, (Signature) Peer Reviewed by: Approved by (RSO): (Date) ?/su /,5 (Sigrature) (Date) LSA 03-02,9116115

Hematite Decommissioning Project Procedure: HDP-PR-FSS-701, Final Status Survey Plan Development Westinghouse Non-Proprietary Class 3 I Revision: S I Appendix P-5, Page I of 1 APPENDIX P.5 FSS SURVEY UNIT CLASSIFICATION CHANGE FORM Survey Area: Survey Unit: No. No. LSA 03

== Description:== Plant Soil Area, Open Land Area 02

== Description:== Class 2 LSA, west of Site Pond in "Area 5" Initial Classification per DP Ch. 14: Classl f] Class2 Z Class3 X Non-Impacted tr New Classification: Class 1 f] Class 2 X C1ass 3 f] Date of Change: (pre-2014) Describe the proposed change and the reason for the change: The LSA 03-02 was created as a buffer area between Class 1 LSA 02-02 and LSA 02-03, and Class 3 03-01, due to the possibility of occasional flooding from the Class I Site Pond into the Class 3 area. area of LSA 03-01was initially stated as 10,879 m' in the Decommissioning Plan. It was reduced to 10,540 m2 and the new LSA 03-02 has an areaof 2,553 m2. LSA The Prepared by: Brian A. Miller W. Clark Evers Approved by (RSO): g"r/tl-!l-9-29-20ts (Signature) /,J TAL^ (Date) //tolr (Date) Quality Record (Print Nanre) (Signature) LSA 03-02,91t6115

Decommissioning Procedure: HDP-PR-FSS-701. Final Status Su Westinghouse Non-Proprietary Class 3 Appendix P-4, Page I of I APPENDIX P-4 FSS SAMPLE & MEASUREMENT LOCATIONS & COORDINATES Survey Area: Survey Unit: Survey Type: LSA 03

== Description:== == Description:== Classification: Plant Open Land Area 02 West of Site Pond in "Area 5" FSS Class 2 Elevations are in feet above mean sea level.

  • Missouri - East State Plane Coordinates [North American Datum (NAD) 1983] (Open Land Area) OR Sanrplers highlighted in red rvill bc collected and archired; radiological analvses perlirrnred oni-v if overir ing root sanrple has a SOF >0.5.

istance in feet liom lower left comer of the surface (Structures); each surface has ifs own (X,Y) = (0,0); OR piping the distance liom the beginning ofthe survey unit. Floor=F; Wall =W;Ceiling=g Roof:R M: Three-Layer (Surface-Root-Deep) or Uniform Systematic = S, Biased = B; QC =Q; Investigation = I Record L03-02-0 1 -P-S-S-00 l-03-02-03 -P-ti-S-00 .122 0 [.xcavation 6-inch srah L03-02-04-P-S-S-00 L03-02-06-l'-t1-S-()0 Excavation 6-inclr grab L03-02-07-P-S-S-00 I.03 09-P- [i-S-00 [:xcaration 6-inch L03-02-1 1-P-R-S-00 L03 I 2-P-Ft-S-00 Lrcavation 6-inch grab L03-02-1 4-P-R-S-00 I lnifbrnr 826721 I.03 I P-E-S-00 lixcavatron 6-inch srab L03-02-1 7-P-R-S-00 L03 r8-P-i-.-S-00 Lscuvation (r-inch qrah L03-02-20-P-R-S-00 L03-02-2 I -t'-E-S-00 Excavation 6-inch grab L03-02-23-P-R-S-00 L03 24-P-r,-S-00 826724 Excavation 6-inch L03-02-t I -P-R-Q-00

ffi ur ffi rq [d -i LSA 03-02 Systematic6ample Locati \\ / \\ \\ /\\\\/ r-oa-[z-or-p-s-s-oo \\ i 't-os-hz-02-P-R-s-oo \\ ( 103-12-03-P-E-s-00 \\ Lo3-02-04-p-sJs-oo t ( Lo3-02-os-p-RJs-oo \\ --+ Lo3-02-06-p-Els-oo l------^ -a f ons 103-02-06-P-E*S-00 \\ *=- I ' LSA 03-02 \\ 12,553 m' PIanar Arqa t\\ los-oh-oz-P-s-s-oo \\ r \\ \\ ,,\\)oI )0\\

-OO \\

r-oo 1

-OO I

!-08-P-R-S-00 \\-0e-P-E-s-00. L0s-02-13-P-S-S-00 103-02-10-p-s-s-bo L9+g?-11-i-E-!-00 r-os_02-ri-p-n_s-do 103\\02-15-p-E-S-00 L03-02-12.P-E-S-00 103-02-11-PIR-Q-0o P-S-S-00 P-R-S-00 \\ 103-0{-21-P-E-S-00 103-02-16-P-S-$00 103-02\\19-P-S-Q-00 L03-02-17-P-R-S-N0. o Lo3-02-18-p-r-s-ob L03-02-22-P-S-S-o0 L03-02-23-P-R-S-00 L03-02-24-P-E-S-00 \\a 0 2040 80 120 1 Feet \\ Easting (feet) Sample lD Start Depth (inches) End Depth (inches) Northing (feet) 103-02-01-P-S-S-00 0 6 864144 826693 103-O2{2-P-R-S-00 6 5S 864144 a26693 103-02-03-P-E-S-00 59 65 864744 826693 103-02-04-P-5-S-00 0 6 864089 826662 103-02-05-P-R-S-00 6 59 864089 826662 103-02-06-P-E-5-00 59 65 864089 826662 LO3-O2-07-P-S-S-OO 0 6 864035 826693 LO3-02-08-P-R-S-00 5 59 854035 826693 103-02-09-P-E-S-00 59 65 854035 825693 103-02-10-P-S-S-OO 0 6 863980 826662 103{2-11-P-R-S-00 6 59 863980 826662 103-02-12-P-E-S-00 59 65 863q80 42666) 103-02-13-P-S-S{0 0 6 863980 826724 103{2-14-P-R-S-00 6 59 863980 826724 103{2-15-P-E-S-00 59 65 863980 826724 LO3-O2-15-P-S-S-OO 0 6 863926 826693 103{2-17-P-R-5-00 6 59 853926 826693 103-02-18-P-E-S-00 59 65 863926 826693 LO3-02-19-P-S-S-00 0 6 863926 826756 LO3,O2-20-P-R-S-OO 6 59 863926 826756 103-02,2 1-P-E-S-00 59 65 863926 826756 103-02-22-P-5-5-00 0 6 863871 826724 103-02-23-P-R-5-00 6 59 86387I 426724 103-02-24-P-E-S-00 59 65 863871 426724 103-02-19-P-S-q-OO 0 6 863926 826756 103-02-11-P-R-Q-00 6 59 853980 825662

FSS.TRnNGULAR GRID SFACING CALC Enter Distance INPIJIS ,. Sri t lit Area 2553 m2 , r:.. rr,: :,r t : Mlnimum# Requrred,tqgions 8 indudes +207o .,:.:..,i SutuoI Unit llplrrb Conpass Limite Ymax (l.Iorthing) 864214 ft Ymin (Northing) 853845 t Xmax(Easting) 825788 ft )fiiln (Easting) 826637 fi l RANDOTIZER TOTXJLE Click ihis button b generate a nerv set.cf random coondinates 855267.0 Nortring (ft) 827147.0 Easting (ft) Entei,elgcter! Random Stafi Point (Origln) 864089 Northing (ft) 826787 Easiing(fi) ORID SPACING IiODIJLE t+orr 19,1 m 62.7 fr ,i. t6o{,v 16.6 m 54.5 t HDP-PR-FSS-701 Final Status Suruey Plan Development Appendix P-l Steps 12.14. Determine Grid Spacing and Sidewall Sample Number HDP LSA 03-02 FSSPD P-1 P-4 Worksheets/P-1 Step 12&14 Grid&Sidewall 913012015 from GlS. Randomization occurs at GlS. from GlS. (Appendix P-1 Step 12.c, in meters) between points. between rows. Sidewall sampling: 3D Area = 2553 m2 (From Site Engineer) 2DArea = 2553 m2 Difference = 0 m2 Number of Sidewall samples required: , - O, (Appendix P-1 Step 14.0 Page 1 of 1

HDP-PR-FSS.701 Flnal St tu8 Ssruey Plan Dev.lopmnt Appendix P-1 Step 2. Evaluate Final RASS Oat! a .!o I E -!E 9., ld a d g t i r E= t 8 oo .8 .9 l G E E= g o -0 o !E o o i! 2N-1ffi2$7{1 s I 070 0.163 0.076 0.000 0.wo 0 078 o o7E 0.1 15 o2m U t.070 o 192 0.1m o.o/o o o/o 004 0 57 om U 0 929 ou1 o 942 U 0 070 0.070 0 094 NA 0.230 0 230 2.502 NA NA I ,2LS1lwM7,na s o30 ooM -0.m0 0.om o o31 o03 o o31 oa3 tl lGO o 16C o 112 0.60 0.60 o oE7 n 245 l, NA 4 157 0.000 0.053 0.170 0 170 1.672 NA NA NA 23LqS-1!wM7-O5 s o 423 o 1r7 o6A -o.241 0.000 { ool 0.m0 oM7 om tl o 811 o1& oo& {.14! 0.oo0 o o73 orla U o 7)5 -0.030 0 000 0.m9 NA 0.180 0.180 I 610 NA NA NA I lt ,2i5-SS1s@tu7-O7 s olm o oao 0.070 o.070 -0 001 0.000 om7 n rt6 U o 11C 0.1tr 0.160 o ool o 253 tl 12( oqm 235-SSlm25ihn s o e7! o lm NA 4.0s1 0.m o ose 0.058 o oa6 nrp ll 1 0?o o 161 o 110 0.020 0.0r 2274 NA NA n 120 n a)7 6 116 tl a rTt n ar4 o7s om om om tm o o73 otu o o70 OM 6?m ?M o r33 tnn 0.018 o-oa:I 0,111 1.E06 0.@5 1.@4 1.5 t.s2 l 0.00? lL r.ss l

  • ShMad Deudion 0-632 o 094 o 08il 0.378 0.021 0.176 li$E fE, AilShmfi. mm6ENtsftc}9Br 1.07 D.6 Xo 8G So

{', t 11 2333' t9 07147 1 57721 4 19 071t-. Mage 6,lchmml l./at (Appendk P 1 Step 9.; (Appendfi P-1 Stlp 8.8) (ApFndix P-l Step 8.b) BackgrouM Refers@ Area Gr@ r6ulta in un(B ol pcllo ' Backoround wtth ingrMh tl.07 pcyg) oubtEcted from gr@ reEult -Backgroud {1.0 pCUg}sutlraded from g16 r6un (Appcndix P-'1 Step2.a) 8 (Aprndix P-1 Step 2.b) LH Mln, Ma, ltr@. iidis, Srdrd Oqtsllon r abq-Max Tc-99 = 0.094 Take e*a smpl6 for Tc-99? lB the max'fdg > DCGL? NO ll NO go no fudhr. lBSUCla$1? NO lfNOgonofudher IfYES: Tc-99 Mafrc-gg DCGL = 0.0U Appddn(P-l gep11.k AforpotentielTe99hdsfDb= 244,450 &fEidb. P-f $ep 11.1 N lor poEdjal Te99 hobpob = 8 {AwAe E!.i.nmd = Appendir P-1 Step La) O.14 os GeatqolRASSSoForBKGSoF (Appendix Pl Step 8 b) T.-S llntfnlfi AEr nr.inE AT Ihds 3.4 300 lo (Yn 0.0(X 244-450 HOP LSA 03-02 FSSPD P-1 P-4 WorlheetrP-l Step 2 RASS D& Eval 980/201 5 Page 1 of 1

HDP-PR-FSS-701 Final Status Survey Plan Development Appendix P-l Step 8. Calculate the Number of Samples in the Statistical Survey Population MARSSIM Table 5.{ MARSSIM Table 5.2, a.= 0.05, p = 0.10 ix P-1 Step 8.d) ix P-1 Step 8.0 A/o Pr 0.1 0.528182 0.2 0.556223 0.3 0.583985 o.4 0.61 1335 0.5 0.638143 0.6 0.664290 0.7 0.689665 0.8 0.7't4167 0.9 0.737710 1.0 0.760217 1.1 0.781627 1.2 0.801892 1.3 0.820978 1.4 0.838864 1.5 0.855541 1.6 o.871014 1.7 0.885299 't.8 0.898420 1.9 0.910413 2.1) 0.921319 2.25 o.944167 2.5 0.961428 2.75 0.974067 3.0 0.983039 3.5 0.993329 4.O 0.997658 4.01 1.000000 c (or 9) Z1*lor Z1-sl 0.005 2.576 0.01 2.326 0.015 2.241 0.025 1.960 1.645 1.282 0.15 1.036 0.2 0.842 0.25 0.674 0.30 0.524 N/2 Value Verification (Append lsotooe(s) SOF (Ra/Tc/Th/lso U) St. Dev. 0.14 DCGLSOF 1 LBGR (Mean) 0.08 shift 0.92 Relative Shift (A/o) 6.5 MARSSIM Table 5.1 (P,-) 1.000000 N 12 N+20% 14.4 N/2 I RASS N/2 8 "N/2" Corresponds to the number of survey unit measurement locations reouired for the WRS Test Hard input of Re!. Shift = 3 for Rel. Shift >3 above N/2 Value Verification lsotooe(s) SOF (Ra/Tc/Th/!so U) St. Dev. 0.14 DCGLsoF 1 LBGR (Adiusted) 0.58 shift 0.42 Adiusted Relative Shift (alo) 3.00 MARSSIM Table 5.1 (P,) 0.983039 N 13 N+20% 15.6 N/2 8 RASS N/2 8 "N/2" Corresponds to the number of survey unit measurement locations reouired for the WRS Test HDP LSA 03-02 FSSPD P-1 P4 Worksheets/P-1 Step 8 Sample Size 9t30t2015 Page 1 of 1

ix P-1 (Step 9.a.) ix P-1 (Step 9.b.) P-1 (Step 9.c.) P-1 (Step 9.d.) P-1 (Step 10) Select lnstrument 2" x 2" Nal SU Background = 10,000 cpm Scan MDC lTot U;.f pCi/g fu-zsc fu-egs fu-r.t 0.61473 o.03223 0.35304 1.0000 HDP LSA 03-02 FSSPD P-1 P4 Worksheets/P-'1 Steps 9-10 Scan MDCs 9t30t201s HDP-PR-FSS-701 Final Status Survey Plan Development Appendix P-{ Steps 9. - 10. Calculate the Scan MDCs DCGL U-235 (inferred Tc-99) Plant SEA HDP-TBD-FSS-002, Appendix C Scan MDCs at Various Backqround Levels BKG (cPM) Ra-226 Th-232 u-234 u-235 u-238 Tot U (4olo Enrich) 4000 0.76 0.55 2314 1.47 19.4 25.9 s000 0.85 0.61 2587 1.64 21.6 29.O 6000 0.93 0.67 2834 1.80 23.7 31.7 7000 1.01 0.72 3062 1.94 25.6 34.3 8000 1.08 0.77 3273 2.08 27.4 36.6 9000 1.14 0.82 3471 2.20 29.0 38.8 10000 1.21 0.87 3659 2.32 30.6 40.9 1 1000 1.26 0.91 3838 2.43 32.1 42.9 12000 1.32 0.95 4008 2.54 33.5 44.9 1 3000 1.37 0.99 4172 2.65 34.9 46.7 14000 1.43 1.02 4330 2.75 36.2 48.5 1 5000 1.48 1.06 4482 2.84 37.5 50.2 Assumes surveyor efficiency of 0.75, observation interval = 1.64 sec, and air qao of 2". Page 1 of 1}}

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