E910-05-052, Rev. 0 to Calculation E900-04-027, Cv Yard Survey Design - Temporary Water Supply Trench in Cv Yard, Appendix A-1 to Final Status Survey Report for Saxton Nuclear Experimental Corporation Open Land Area Survey Unit OL1-6.

Rev. 0 to Calculation E900-04-027, Cv Yard Survey Design - Temporary Water Supply Trench in Cv Yard, Appendix A-1 to Final Status Survey Report for Saxton Nuclear Experimental Corporation Open Land Area Survey Unit OL1-6.

ML052140245
Person / Time
Site:	Saxton File:GPU Nuclear icon.png
Issue date:	03/11/2005
From:	Brosey B FirstEnergy Corp
To:	Office of Nuclear Reactor Regulation
References
-RFPFR, E910-05-052 E900-04-027, Rev. 0
Download: ML052140245 (32)

Text

APPENDIX A-1 SNEC Calculation No. E900-04-027

-I 0, 02A) I SNEC CALCULATION COVER SHEET-CALCULATION DESCRIPTION tAs7 e Calculation Number Revision Number Effective Date Page Number E900-04-027 0 1 ofJok Subject U a CV Yard Survey Design - Temporary Water Supply Trench in CV Yard Question 1 - Is this calculation defined as 'in QA Scope"? Refer to definition 3.5. Yes Z No El Question 2 - Is this calculation defined as a 'Design Calculation'? Refer to definitions 3.2 and 3.3. Yes Z No El 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 Onginator's immediate supervisor should not review the calculation as the Technical Reviewer.

DESCRIPTION OF REVISION APPROVAL SIGNATURES Calculation Originator IB. BroseyIB3 *3h Technical Reviewer IR. Holmesl Additional Review I A. Paynteri Additional Review

X-a SNEC CALCULATION SHEET Calculation Number Revision Number Page Number E900-04-027 0 l Page 2 of 8 Subject CV Yard Survey Design - Temporary Water Supply Trench in CV Yard 1.0 PURPOSE 1.1 The purpose of this calculation is to develop a survey design for one (1) 'Temporary Water Supply Trench" located in the CV Yard (OL1). This soil survey unit is shown on Attachment 1-1 and in the Attachment 1-2 photo. The trench is about 160 feet long, having an average width of about 46 inches and a mean depth of about forty (40) inches. It is a below grade Class 1 open land area and begins in site grid No. AS-1 27. This survey design is only valid for the section of trench depicted on Attachment 1-1 (beginning in grid AS-1 27 and ending in grid AW-125).

1.2 This survey unit lies in site area OLI and is designated OL1-6.

1.3 The total exposed soil surface area is -163 squaremeters which include the side walls.

2.0

SUMMARY

OF RESULTS The following information should be used to develop a survey request for this survey unit. The effective DCGLw values are listed below. The US NRC has reviewed and concurred with the methodology used to derive these values. See Attachment 2-1 to 2-6.

I Volumetric DCGLw (pCil/g - Cs-137)  !

5.75 (4.31 A.L.)

NOTE: A.L. 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. The window will straddle the Cs-137 662 keV full energy peak width (see calibration information on Attachment 3-1).

Soil Scanning Parameters MDCscan (pCig) - Cs-137 Scan Speed (cm/sec) Maximum Distance from Surface  % Coverage 3.3 25 4 (gap between detector face & soil surface) 100%

2.1.2 The instrument conversion factor/efficiency shall be not less than the lowest value reported on Attachment 3-1 (205 cpm/uR/h - Cs-137).

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

2.1.4 The MDCscan is determined using the MicroShield model of Attachment 4-1.

MDCscan calculations are shown on Attachments 4-2 and 4-3.

2.1.5 Background has been measured in the OL1 area over similar materials, and ranges from about 100 cpm to about 400 cpm (see Reference 3.1). If a count rate of greater than 300 gross cpm 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. Sample the elevated areas(s) IAW SNEC procedure E900-IMP-4520.04 (Reference 3.2).

6-- SNEC CALCULATION SHEET Calculation Number Revision Number Page Number E900-04-027 0 Page 3 of 8 Subject CV Yard Survey Design - Temporary Water Supply Trench in CV Yard NOTE This survey design must be revised if it is shown that the true background count rate (from natural occurring materials) is greater than -550 counts per minute.

2.1.6 Sampling points are to be clearly marked, identified and documented.

2.1.7 All survey personnel shall be trained to identify 300 gross cpm based on the audible instrument response.

2.1.8 Other instruments of the type specified in Section 2.1.1 above may be used during the FSS, but they must demonstrate a detection efficiency at or above the value listed in Section 2.1.2.

2.1.9 The minimum number of sampling points indicated by the Compass computer program for this survey unit (Reference 3.3) is 16 (see Compass output on Attachment 5-1 to 5-4). Sampling depth should be the first 6 inches (15 cm) of soil.

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

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

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

• odd shaped diagrams, and/or

• coverage concerns (see Attachment 6-1 for VSP sampling point locations) 2.1.11 The starting points for physically locating sample sites in the trench area are based on measurements from a local landmark (South end of trench well header and North end region - see diagram on Attachment 6-1). Soil sample points are positioned using coordinates developed from these landmarks.

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 coordinator for permission to delete the samplin, 2oint.

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

?SNEC CALCULATION SHEET Calculation Number Revision Number Page Number E90S-04-027 0 I Page4of 8 Subject CV Yard Survey Design - Temporary Water Supply Trench in CV Yard

3.0 REFERENCES

3.1 SNEC Calculation No. E900-03-018, 'Optimize Window and Threshold Settings for the Detection of Cs-137 Using the Ludlum'2350-1 and a 44/10 Nal Detector", 8/7/03.

3.2 SNEC Procedure E90G-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 2.0 (or greater), Copyright 2002, Battelle Memorial Institute.

3.5 Plan SNEC Facility License Termination Plan.

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

3.7 GPU Nuclear, SNEC Facility, 'Site Area Grid Map", SNECRM-020, Sheet 1, Rev 2,1/29/03.

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

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

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

3.11 Microsoft Excel 97, Microsoft Corporation Inc., SR-2, 1985-1997.

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 Post-remediation soil samples from this area are used as the initial estimate of variability for the OL1-6 area. These results are shown on Attachment 7-1.

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

4.4 The number of points chosen by Compass are 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 The site area drawing used to determine the physical extent of this area is listed as Reference 3.7.

4.7 Remediation History The Temporary Water Supply Trench in the OL1 area was installed to supply water to a trailer complex in the OL1 area. Clean materials were used to lay the water line (PVC pipe, etc.), but slightly contaminated soil was used to backfill the trench. SNEC site management decided to remediate these materials. The open trench area was selected to be surveyed IAW FSS methodology so that clean materials could be used to backfill the trench allowing closure. The open trench area is a safety hazard to site personnel. This final status survey

eAft SNEC CALCULATION SHEET Calculation Number Revision Number Page Number E900-04-027 l0 Page 5 of 8 Subject CV Yard Survey Design - Temporary Water Supply Trench in CV Yard only addresses the trench area starting in grid AS-127 and ending in AW-125 as shown on Attachment 1-1.

A review of pre-remediation survey data pertaining to this area was conducted in support of this survey design. Analysis of soil samples showed Cs-137 concentrations ranging from

-0.1 pCi/g to -43 pCi/g (see Attachment 7-1). After remediation to less than 2 pCi/g, post remediation samples show that the area has been reduced to an average concentration of 0.87 pCi/g (Cs-137) with a maximum value of 1.15 pCi/g (based on four (4) samples).

4.8 This survey design uses Cs-137 as a surrogate to bound the average concentration for all SNEC facility related radionuclides in the survey unit. The effective DCGLw is just the permitted Cs-137 concentration (6.6 pCi/g) 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 DCGLw for this radionuclide.

The impact of remediation must be considered in determining the effective Cs-137 DCGLw surrogate value. The initial remediation phase in the OL1 area was complete by about July of 2001. Most samples collected prior to this date have been disqualified. The final listing was decayed to December 15th, 2004. In all, twenty three (23) sample results were used to determine the best representative mix for OL1. Current remediation efforts in the trench area have been effective in lowering the average concentration of Cs-137 in the survey unit to less than 2 pCi/g (unprocessed) (see Attachment 7-1).

4.9 The sample database used to determine the effective radionuclide mix for the CV Yard area has been drawn from previous samples that were assayed at off-site laboratories. This list is shown on Attachment 2-1 to 2-6, and includes (23) analysis results. Review of the data shows several radionuclides have not been positively identified at any significant concentration. These radionuclides have been removed from the data set and will not be considered further. Radionuclides removed include Am-241, C-14, Eu-152, Ni-63, Pu-238, Pu-239 and Pu-41. Additionally, the data shows Cs-137 to be the predominant radioactive contaminant found in the area. Sr-90 on the other hand, was positively identified in only one (1) sample. H-3 was identified as a positive contaminant in six (6) samples, and Co-60 was identified in three (3) samples.

The decayed sample results were input to the spreadsheet titled "Effective DCGL Calculator for Cs-1 37" (Reference 3-8) to determine the effective volumetric DCGLw values for the OL1 area. The output of this spreadsheet is shown on Attachment 2-6.

The Nal 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 cpm/uRlh 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 cpm to -400 cpm, but for most locations in OL1 it lies between 100 and 200 cpm. The resulting MDCscan is -3.3 pCi/g (see Attachment 4-2 and 4-3). This value is based on a nominal background value of 200 cpm.

4.10 The survey unit described in this survey design was inspected after remediation efforts were shown effective. A copy of portions of the SNEC facility post-remediation inspection report (Reference 3.9), is included as Attachment 8-1.

eSNEC CALCULATION SHEET Calculation Number Revision Number Page Number E900-04-027 0 Page 6 of 8 Subject CV Yard Survey Design - Temporary Water Supply Trench in CV Yard 4.11 No special area characteristics including any additional residual radioactivity (not previously noted during characterization) have been identified in this survey area.

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

4.13 "Special measurements" (as described in the SNEC LTP) are not included in this survey design.

4.14 No additional sampling will be performed lAW this survey design beyond that described herein.

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

4.16 The survey design checklist is listed in Exhibit 2.

4.17 Area factors are not applicable in subsurface soil volumes (below 1 meter). Therefore, the area factor input requirement for soil in the Compass computer program is 1 for both a 10,000 square meter area as well as for a 1 square meter area (see Attachment 5-1).

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

6.0 APPENDICES 6.1 Attachment 1-1, is a diagram of survey unit OL1-6 in the OL1 area.

6.1.11 Attachment 1-2, is a photo of a section of the trench area.

6.2 Attachment 2-1 to 2-6 is the sample results from the OL1 area in addition to the DCGL calculation sheets (decayed to December 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.

6.4 Attachment 4-1, is a MicroShield model of a soil volume used to determine the exposure rate from a 1 pCi/g Cs-1 37 source term in a cylindrical geometry of six (6) inches in depth for an assumed density of 1.6 g/cc.

6.5 Attachment 4-2 and 4-3, is the MDCscan calculation sheets.

6.6 Attachment 5-1 to 5-4, is the Compass output for the OL1-6 soil survey unit.

6.7 Attachment 6-1, is the sample point locations with dimensions.

6.8 Attachment 7-1, is the soil variability results for selected soil samples from the OL1-6 area.

6.9 Attachment 8-1, is the inspection report for the OL1-6 survey area.

SNEC CALCULATION SHEET Calculation Number Revision Number Page Number E90-04-027 0 Page 7 of 8 Subject CV Yard Survey Design - Temporary Water Supply Trench in CV Yard Exhibit 1 SNEC Facility Individual Radionuclide DCGL Values (a 25 mrem/y Limit 4 mremly Goal 25 mremly Limit (All Pathways) (Drinking Water)

Radionuclide Surface Area Open Land Areas Open Land Areas l (dpm/1OOcm 2 ) (Surface & Subsurface) (Surface & Subsurface)

(pC!lg) (pcilg)

Am-241 2.7E+01 9.9 2.3 C-14 3.7E+06 2 5.4 Co-60 7.1 E+03 3.5 67 Cs-137 2.8E+04 6.6 397 Eu-152 1.3E+04 10.1 1440 H-3 1.2E+08 132 31.1 Ni-63 1.8E+06 747 - 1.9E+04 -.

Pu-238 3.OE+01 1.8 0.41 Pu-239 2.8E+01 1.6 0.37 Pu-241 8.8E+02 86 19.8 Sr-90 8.7E+03 1.2 0.61 NOTES:

(a) While drinking water DCGLs will be used by SNEC to meet the drinking water 4 mrem/y goal, only the DCGL values that constitute the 25 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).

E ach SNEC CALCULATION SHEET Calculation Number Revision Number Page Number E900-04-027 0 Page 8 of 8 Subject CV Yard Survey Design - Temporary Water Supply Trench in CV Yard Exhibit 2 Survey Design Checklist Calculation No. Location Codes E900-04-027 I OLI-6 (Temoorary Water Supply Trench)

ITEM REVIEW FOCUS 1 Has a survey design calculation number been assigned and is a survey design summary description provided?

2 Are drawings/diagrams adequate for the subject area (drawings should have compass headings)?

3 Are boundaries properly identified and is the survey area classification clearly indicated?

4 Has the survey area(s) been properly divided into survey units lAW EXHIBIT 10 5 Are physical characteristics of the area/location or system documented?

Hav Is a remediation effectiveness discussion included?

7 Have characterization survey and/or sampling results been converted to units that are -

comparable to applicable DCGL values?

8 Is survey and/or sampling data that was used for determining survey unit variance included?

Is a description of the background reference areas (or materials) and their survey and/or j sampling results included along with a justification for their selection?

10 J Are applicable survey and/or sampling data that was used to determine variability included?

II Will the condition of the survey area have an impact on the survey design, and has the probable impact been considered in the design?

Has any special area characteristic including any additional residual radioactivity (not 12 previously noted during characterization) been identified along with its impact on survey design?

13 Are all necessary supporting calculations and/or site procedures referenced or included?

14 Has an effective DCGLw been identified for the survey unit(s)?

15 Was the appropriate DCGL~mc included in the survey design calculation?

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

17 1 Has an elevated measurement comparison been performed (Class 1 Area)?

18 l Has the decision error levels been identified and are the necessary justifications provided?

19 l Has scan instrumentation been identified along with the assigned scanning methodology?

20 Has the scan rate been identified, and is the MDCscan adequate for the survey design?

21 Are special measurements e.g.. in-situ gamma-ray spectroscopy required under this design, and is the survey methodology, and evaluation methods descnbed?

22 Is survey instrumentation calibration data included and are detection sensitivities adequate?

23 Have the assigned sample and/or measurement locations been dearly identified on a diagram or CAD drawing of the survey area(s) along with their coordinates?

24 Are investigation levels and administrative limits adequate. and are any associated actions clearly indicated?

25 l For sample analysis. have the required MDA values been determined.? I Yes, 26 ( Has any special sampling methodology been identified other than provided in Reference 6.3? I Yes.

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

Trench in CV Yard AY

/ __ _ _ _ _ _ __------- -_----------

,1I 1 AW -

A V - _ _ __ ___ _ ___ _

An AU-127 AU Approximate Location of Trench AAT-127 AT 1 1 127 126 125 124

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 locationldescription, 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 z this information the mean, sigma, and mean % of total are calculated. The mean % of E 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) t had a positive result. This value is listed as the value in the mean result field. This results in higher "mean percent of total" values in the mix, which are conservative.

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

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

IV. Summary - Since the CV Yard and Boulders are volumes of soil or rock material, existing in place or in a pile, the release limit is primarily based on the volumetric DCGLW. Using the above data selection logic tables the calculated Cs-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).

I

TABLE I . Data LisUnc (pCUa I

.00 40

+00 3AM41 2 T 6.006E02 1 t.00Et I 3.0 1.8900 I 1.28E42 I 1.40E2 82M56 l 7.00.13 I .0E43 I 5.0E403 I 3.69E60 .60E.02I 3.41E. [2 iii17 SXSL314S I Ot SXSL3145 _ I, Si.i Ot I9 SXSL3163 East CVYard, Soil Pile & Too t6" eothi, O1. .94EdO CVYard Soil- West Side. API.7.?.1. 2.22E400 3.25E6l2 I 5.00E02 9.00E1 1 1* .7802 .V2E.02 VYard Soil -West Side,AP-7, OiL_ 2.23E40 3.6E-02 5.30E02 I L.00M1 I 221tE02 6.31E42 I 3.64E.02 Yard Soil- West Side, API-7. 01L 1 2.24E+00 l 2.77E40 7A-02 i 3ME-0 . I I M402 1 1 1 1 ABLE 2 - Dacaved LUstinc (DCUal J

_ET (d) i 1065 1520 561 566 565 561

_561 903 903 701 680 603 503

.00E03 I 345E01 8.60E.02 I 3.37E+00 I20E-02 August 30. 202 1.17E.02 6.98E03 I 4.95E03 I la SXSL3t4c _520 1r SX93145 EastCV arda.SoilPileS _503 18 SXSL3149 So9IPile, CVYard, Si.

1.;79h.O 4.16Ei02 4.14E. kuost 30, 2002 IS East CVYard,Soil Pile3 Top IS" Depth),01.1 sXsL3153 I CrIV '.Mtall.- W... t .A t-t I 4 r-v

-'4 Z

s. ItW t toW- 3ctober 2.2003 October 2. 2003 105 105 2.19E600 3.1702 4.BIE42 4.9gE41 I 221E.02I 6-062 I 36aK02 l2.75EO2 6.76E.02 I 3.81E00 I 2.77E421 I4.2902 I 3.04W02 I I October2.2003 [105 1 Il 22*40+0 KEY IYellow Shaded Background - Positive Result I lGray Shaded Background = MDA 2

cWo

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

LocationDescription H-3 Sr-90 Co-60 Cs-137 Total pCilg SNECSample No 1 CV Tunnel CV Tunnel Sediment Composite, OL1 9.01E OO 8.59E-01 1.17E+03 1178.S9 2 SX9SLSO219 Subsutace Sample .29 (0-6'), AY-128, 01 5.36E-01 0.64 3 SXSL1063 North CV Yard Soil BA-127, 812' El, Sample # 5, OL2 4.20E O00 8.55E.01 5.0o 4 SXSLt089 North CV Yard Soil AY-127, 810' El, Sample # 3, O11 2.78E+0 _ 1.24E+OO 4.02 5 SXSLI111 North CV Yard Soil AY-128, 804 El, Sample # 2. O1 4.47E+O0 1.74E+O0 6.21 o SXSL1122 North CV Yard Soil AY-129, 798 El, Sample 0 2, OL1 3.15E+OO 4.60E+00 7.76 7 SXSL1130 North CV Yard Soil AX-129, 803' El, Sample 0 4, OL1 4.58E+OO 2.44E-02 2.18E+01 28.42 8 SXSL1132 North CV Yard Soil AZ-130, Sample # 6, OL1 2.73E+o0 _ 2.50E+00 6.23 9 SXSL1270 AX-12S, 3-3, Soil, CV SESide 5 From CV, 800' El., OL1 2.18E+01 21.82 10 SXSL12S1 AX-128, 3-1, Soil, CV Tunnel East 6 From CV, 800 El,OL1 4.14EQ00 4.14 11 SXSL2649 Anulus Well, A-2, S to 10' Depth, 01 _ _ 5.74E.01 0.57 13 SXSL2S71 CV Area - East Yard Dirt Pile - Middle, 12 Way Up, 01 5.37E-01 0.54 14 SXSL2872 CV Area - East Yard Dirt Pile . Bottom (also top center), OL1 9.58E.02 0.10 16 SXSL3140 East CV Yard, Soil Pile p6' on West Side (6' Depth), OL1 7.99E.01 0.80 18 SXSL3142 Soil Pile, CV Yard, Three Feet on East Side, SR.37, OL1 __ 5.81E-01 0.68 17 SXSL3145 East CV Yard, Soil Pile 3' on East Side (8 Depth), OL1 1.22EO 1.22 1S SXSL3149 Soil Pile, CV Yard, Six Feet on East Side, SR-37,01U 2.90E.O1 0.29 19 SXSL3163 East CV Yard, Soil Pile pTop (6' Depth), OLI 2.91E.01 0.29 21 SXSL4142 CV Yard Soil -West Side, API-7, 01 _I 8.94E-01 0.89 22 SXSL4143 CV Yard Soil - West Side. APi-7, OL1 4.97E-01 0.50 23 SXSL4149 CV Yard Soil - West Side, API-7, OL1 6.74E.02 3.87E+00 3.94 TABLE 4 - Ratio To Cs- 137 for Positive Nuclides Location/Description H-3 Sr-g0 Co-60 Cs-137 Total SNIECSample No 1 CV Tunnel CV Tunnel Sediment Composite, OL1 7.71E.03 7.35E404 1..OOE00 1.01 2 SXSSL99219 Subsuface Sample 029 (0-8), AY-128, OL1 1.OOEO00 1.00 3 SXSL10S3 North CV Yard Soil BA-127, 812' El, Sample 0 6, OL2 4.91E.00 1.OOE+OO 8.91 4 SXSL10S9 North CV Yard Soil AY-127, S10'El, Sample 03, OL1 2.23EO00 _.0E4OO 3.23 8 SXSLIIIS North CV Yard Soil AY-128, 804' El, Sample 0 2,011 2.57E00 1.00E+00 3.87 8 SXSL1122 North CV Yard Soil AY-129, 798' El, Sample 2, OL1 6.85E.01 1.00E00 1.68 7 sXSL1130 North CV Yard Soil AX-129, 803' El, Sample 04, OL1 2.10E.01 1.12E403 1.0E+00 1.21 8 SXSL1132 North CV Yard Soil AZ-130, Sample 0 6, OL1 1,09E+00 1.O0E'i00 2.09 9 SXSL1270 AX-129,3.3, Soil, CV SESide 8 From CV, 800' El.,01 .0 1.OE+OO 1.00 10 SXSL1281 AX-128, 3.1, Soil, CV Tunnel East 8'From CV, 800' El, OL1 1.00E00 1.00 SX528649 Anulus Well, A-2, 5 to 10 Depth, OL1 1.OOE+00 1.00 11 1.00 13 SXSL2871 CV Area - East Yard Dirt Pile - Middle, 112Way Up, 011 O.OOE4I0 14 SXSL2872 CV Area - East Yard Dirt Pile- Bottom (also top center), OL1 1.OOE+00 1.00 18 SXSL3140 East CV Yard, Soil Pile gM6on West Side (68 Depth), OL _ 1 .O00E00 1.00 SXSL3142 Soil Pile, CV Yard, Three Feet on East Side, SR-37,OL1 1.0OE+N0 1.00 16 SXSL3145 East CV Yard, Soil Pile @3' on East Side (8 Depth), OL _ 1.OE+00 t___ 1.00 17 18 SXSL3149 Soil Pile, CV Yard, Six Feet on East Side, SR-37, OL1 _ 1.00E 01.00 19 SXSL3163 East CV Yard, Soil Pile a Top (6' Depth), 01 _ 1.O0E4 OO 100 21 SXS4142 CV Yard Soil - West Side, API-7, OL1 1.00E0O0 1.00 22 SXSW143 CV Yard Soil - West Side, APi-7, OL1 1O00 1.00 23 XSL4149 CV Yard Soil -West Side, API-?, OL1 .OEA 1.74E- 4 2 0_ 1.02

.9

.74E.02 100 A A A A

2 41 7.71E-03 1 2.96 Mean=* 1.9SE-00 6.4ZE.03 - ---

I... I I - -

Sigma=* 1.1100 U.U1U U.UtUU I I -

Mean % of Total=: 0.26% 0.22% 33.74% 100.00%

3

Table 5

' j Z jT I SNECAL-W~tI 75'% i Totat'Ac vLtDUmt W nwist*iatlve&ulrlt*

!Effective DCGL Calculator for Cs-137 (in pCUg) j 1 16.98 IpCiig 1 12.74 IpCi/g

!! iI I I. , ,I SAMPLE IIU BER(s) CVYARDSOIL&BOULDERSAMPLES l i i 17.45% 25.0 mremryTEDELimit  ! _ 5.73 lpCII9 4.30 lPCIIP 7.79% im mremfy Drlnkin2 Water (OW) Limit PChedcfor25mremlv j t

. _ 9  ! s s ie ww Lr .. , . _ .

Sample Input A . AllowedpCIV for isotope Am.241 (pClg,uci %

of Total, etc.) %of Total 0 000%

25 mremlTEDE Limits (pC~g) 9.9 y 25 mremj TEDE 000 This STmple T O 00 2 [C-14 0.000% 2.0 0.00 0 00 C.14 3 Co.60 0.0064 0 216% 3.5 0 04 0 05 ,QQCo.60 4 Cs.137 1.0000 33.738% 6.6 5.73 3.79 5 Eu-152 0 000% 10.1 000 0.00 I5LIEuV152 6 H.3 1.9499 65.786% 132 11.17 Am.241 0.37 7 tJi-63 0.000% 747 0 0 00 0 00 MJ163 B Pu.238 0 000% 1.8 0.00 0 00 IBPu.238 S Pu.239 0 000% 1.6 0 00 0 00 XPPti.239 I0 Pu.241 0 000% 86 0 00 0.00 r~lPu.241 II Sr-90 0.0077 0 260% 1.2 . . 0.04 0.16 XsSro9 2.96E&00 100.000% 16.98 4.364 Maximum Permissible Maximum To Use This Information, I pCilg Permissible pCiIg Sample Input Units Must Be In I (25 mremty) (4 mremly) . . pCIIq not %of Total, I ATTACHMEMr 2- 4.

CV YARD SOIL BOULDERS TABLE 5 . RATIO TO Cs-137 SNECSm.l. No LABNo l8O40tO.1410 14-2 M3 0,00 C.40 Cs.137 Toel I CVTu-l. OWIT.010203141 CV T-m S.&.50dC-is.CII a__I 770a03 66E504 1E0600 100 I 5s15 "99219 111014 S0utf SmaSe029 10S),AY-12S al 1E00

0. oo 00 2 SXSl1063 T.Idy064001:111114 I NohCYCVYad BA.12?.012 Et Sall'po 5. a 2 4 76E#00 I O0E000 re7 4 sxSI 1089 T.lMdyno.0SON t19164 2 NoetCVYudS04 AY-127.0IEt S," 2(

3 ll 216E600 - 00Eoa 236 5 - S5X0 MS T.d,...80020;L16l4-2 NoOOCVY.,dSo4AY.121. $04ELS..oOP.2. 011 250E6000 - OOE00 2s0 SSi 11722 T.ldy060021:t1411144 N~oICVY.d SodAY.129 tDVEl S.0010.i2 CXI 6a I 00ai00 toE+00 o 7 5x11120 T.Idy-o80022;11114S Nft CVY'dSo AJ.129 0004ElSw44I4.t111 203E-01 I1OE-03 1E06.00 120 a SxSI1132 Tl.ldy- *0023; t1194 S No CVYord Sol AZ.130. Sb.pl

• S a I 06E-00 -I I OOE-00 2o0

• S-St 1200 SWxT. 01001002 AX.129 3. So4 CV SElSt" S' 5FmCV S0WEl. a I OoE#00

- 104 10 SxSaml2S WoXT.010805541 Ax 124, 3-. Sod.CVT, faE~stFlomCV. SW Et Ck I I OoE*o00 00 II 0XS126049 T.ldy-7220; I160?7 I A.A.Wl. A.2. -la_ N Cp Ift.O_ I oOE06 I00 11 SXS12d;i Teledynoe100; 17113-101 CVAl.$ EFd Yld t(MPiIsE . lm V2 WayUp.COI It00E0t 100 14 SxSIS2802 16Fed-IEdC L11T3116U VW.

A-CV YO To S ot Ed(, 9 SR0 aX I Wp I OOEiO 00 Is 5XS12140 BWXT.1030402610 1d.0CVYSC d S0"P600ro".aWWad l W.4 Dr oh CAI I OE00 I00

'0 SXSE3149 T.-hy.,.:1203064354Pd. CVYud.SMoo"FMMES.dB. SR 3_O __ tII E0000 100 II BWXT.103000.10541 Ed0 CV Y.d. Se. P4e0@To(r.0Ptl Ca, OOE_ I 000 o 1I 5104147 T.-dy-. t2211 -2 CVYellSod. W-lSdW API.7a1 I10 0E.00t 22 SX654143 0oo T.I.do t 22103J CV YedlSol . Wall 0 AP1 .

AP 41 001

_ t OoEo I 23 SxSI414 Te*ldy5.: 122111-4 CV YAStdO.W.dSSW. API- . II I I STE 02-I 001.00i 102 U.... 18909911 0 0076991 0 005l08 i I 1 2 90 S0.9500 Wel % of Tdel . 651 # ____ % 0 00% 100 00 %Jj 2 So..' e....

5 20E470 7706 031 2 30 02 1 1.049I 6 23 50dl 1000 8347% 01t2% j0 37% 16 0J100 00%

KEY Y.11 w Bo 0 0 . o P 0040.* 40.S 61 Oa=l o 14 i 14 9 0 0 M I . . 0' t

• 1. 2 0 06 P. dw 1 1 05 .

2n2sn200 5-CV Yaro SOd & Bouolders ATTAC.YMENa ' Si od

E SNEC AL 1 75% Total Activty LImit DCGLw Administrative Limit Effective DCGL Calculator for Cs-137 (In pClg) 1 16.70 IpClig 1 12.53 IpCi1g I SAMPLE NUMBERislICV YARD SOIL & 130111 DElR SAMPI ES n.,uv ,Id4 12115104 I

I Csl137 Llmit I Cs137AdministtveLmit I 17.39% l 25.0 mremty TEDE Limit 1 5.75 TpCI/g 4.3 Ip I 7.60% M1 4.0mremty Drinking Water (DWI Limit El Check for 25 inrem/y l

Sample Inpui (pCi/g. uCI. % of 25 mremty TEDE 4 mrremnDW Limits A. Allowed pCilt for 25 B - Allowed pCi1 Value Checked from This Sample This Srmph -

solope Total, etc.)  % of Total Limits (pCIig l (pCig) mremty TEDE for 4 mremty DW Column A or B mremly TEDE mrYn DW.-:

Am-241 0.000% 9.9 i 2.3 0.00 0.00 0.00 0.00 0.00 &. Am-241 2 C-14 0000% 2.0 5.4 0.00 0.00 0.00 0.00 6;00i C-14 3 Co-60 0 0058 0.200% 3.5 I67.0 0.03 0.08 0.03 0.04 0 00 Co-60 4 Cs-137 1.0000 34.429% 6.6 !397 5.75 13.15 5.75 3.79 0.01 Cs- 137 6 Eu-152 0.000% 10.1 ,j 1440 0.00 0.00 0,00 0 00 . 0.00 Eu- 152 6 H-3 18910 65.106% 132 *t31.1 10.87 -24.87 10.87 0.36 024 V': H-3 7 Ni-63 0.000% 747 .819000 0.00 0.00 0.00 000 ° °° Al Ni-63 PN-238 0.000% 1.8 0.41 0.00 0 0.00 0.00 0.00 .0,0o0 PU-2J8 9 Pu-239 0.000% 1.6 0.37 0.00 0.00 0.00 0.00 .- 0b0o Pu.239 10 Pui-241 0.000% 86 19.8 0.00 0.00 0.00 00.000.' 66.i;' Pu.241 II Sr-90 0.0077 0.265% 1.2 0.61 0.04 0.10 0.04 0.16 0.05lŽs Sr-90 Z.90Eu+U IU0.UUU000 16.70 16.70 4.348 0.304 I Maximum Permissible Maximum To Use This Informmieon, Ssmple pCI/g Permissible pCU/9 Input Units Must Be In pCI/g noL (25 mremly) (4mremly) /. nfTrtal

______________________________________________________________ 5 .1. _____________

• L ATTACHMEN1- 2 G

2350 INSTRUMENT AND PROBE EFFICIENCY CHART 10106/04 Inst# Cal Due AP #

TYPICAL VALUES Probe # Cal Due I

cpm/mR/h 95361 6/25/05 P&W 25686 Pk 6/28/05 211,799 98625 5/18/05 R&Y 211680 Pk 5/18/05 214,882 98642 9/28/04 B&W 185844 9/28/04 209,771 98647 5/18/05 G &Y 211667 Pk 5/18/05 218,807 117566 4/09/05 G&R 185852 Pk 4/13/05 209,862 117573 5/18/05 O &Y 211674 Pk 5/18/05 212,173 126172 6/07/05 G&W 196022 Pk 6/07/05 208,302 126198 11/03/04 R&W 196021 Pk 5/25/05 209,194 129423 5/18/05 P &Y 211687 Pk 5/18/05 213,539 129440 4/09/05 O&W 210938 Pk 4/14/05 205,603 I2350 INSTRUMENT 1 8/26/04 AND PROBE EFFICIENCY CHART 1

INST 43-68 PROBE BETA ALPHA INST # C/D PROBE C/D EFF EFF 79037 04/06/05 122014 04/23/05 25.8% N/A 126188 1/27/05 099186 1/27/05 28.2% 10.7%

126218 01/08/05 095080 01/09/05 27.9% N/A

MicroShield v5.05 (5.05-00121)

GPU Nuclear

'age :1 File Ref:

)OS File: SOIL.MS5 Date:

Wun Date: October 20, 2004 By:

Zun Time: 12:54:38 PM Checked:

)uration : 00:00:01 Case

Title:

Soil

Description:

Soil Density 1.6 g/cc, 6" Deep Cylinder @ 5" from Surface

- Geometry: 8 - Cylinder Volume - End Shields Source Dimensions Height 15.24 cm 6.0 in Radius 28.21 cm 11.1 in Dose Points X Y z

1. 1 0 cm 27.94 cm 0 cm 0.0 in 11.0 in 0.0 in Shields Shield Name Dimension Material Density Source 3.81e+04 cm3 Concrete 1.6 Air Gap Air 0.00122 Source Input Grouping Method : Actual Photon Energies Nuclide curies becauerels UCi/cm 3 Bg/cm3 Ba-1 37m 5.7670e-008 2.1338e+003 1.5136e-006 5.6003e-002 Cs-1 37 6.0962e-008 2.2556e+003 1.6000e-006 5.9200e-002 Buildup The material reference is: Source Integration Parameters Radial 40 Circumferential 40 Y Direction (axial) 40 Results Energy Activity Fluence Rate Fluence Rate Exposure Rate Exposure Rate MeV photons/sec MeV/cm 2 /sec MeV/cm 2 /sec mR/hr mR/hr No Buildup With Buildup No Buildup With Buildup 0.0318 4.418e+01 6.794e-06 8.222e-06 5.659e-08 6.849e-08 0.0322 8.150e+01 1.306e-05 1.591 e-05 1.051e-07 1.280e-07 0.0364 2.966e+01 7.236e-06 9.448e-06 4.11 1e-08 5.368e-08 0.6616 1.920e+03 6.179e-02 1.091e-01 1.198e-04 2.115e-04

-OTALS: 2.075e+03 6.182e-02 1.091e-01 1.200e-04 2.118e-04

.4110

Nal Scan MDC Calculation- CV Trench.mcd Nal Scan MDC Calculation b := 200 p := 0.5 HS d := 56.42 SR := 25 d := 1.38 Conv := 205.603 MS output := 2.115-10-4 HS d

- = 2.257 Observation Interval (seconds)

SR HSd ObservationInterval (seconds)

SR bO°i b * := 0 60 60 hDCR; := d-,b

°i MDCR i = 100.629 net counts per minute MDCR i MDCR surveyor: r MDCR surveyor = 142.311 net counts per minute MDCR survevor MDER:=

Conv MDER = 0.692 iLR/h MDER MDC scan :=

MS output 110 MDC scan = 3.273 pCi/g 2/25/2005 4of 5 4t ',2-.

Na2 Scan MLDC Calculation- CV Trench.mcd where:

b = background in counts per minute b= background counts in observation interval Conv = Nal manufacturers reportedresponse to energy of contaminant (cpmluR/h) d = index of sensitivitv (Table 6.5 MIARSSIXM). 1.38 = 95% ofcorrect detection's. 60%false positives HSd = hot spot diameter (in centimeters)

MWDCscan = Minimum Detectable Concentrationforscanning (pCiWgV XMDCR, = Minimum Detectable Count Rate (ncpm)

A4DCRjz,,.0r, = MDCR) correctedbv human performancefactor(ncpm)

MDER = Minimum Detectable Exposure Rate ,uRg'h' X/Soutp, = UicroShieldoutput exposure rate/or I pCi/g of contaminant {rmnRh)

O0= obervation Interval (seconds) p = human performancefactor SR = scan rate in centimetersper second NOTE This is an example of an MDCscan calculation that is valid for a specific set of site conditions including the computer model used, soil density, soil moisture content, surveyor efficiency, ground cover, soil background and other variables that influence the calculated results.

However, this and similar scan MOC's have been deemed valid for survey planning.

5 of 5 2/25/2005 5 of 5

.! -Iac"'MEIN

Site Report Site Summary Site Name: TRENCH OLI-6 Planner(s): BHB Contaminant Summary NOTE: Surface soil DCGLw units are pCig.

Building surface DCGLw units are dpml100 cm=.

Screening Contaminant Type DCGLw Value Used? Area (mn) Area Factor Cs-137 Surface Soil 4.31 No 1 I 10,000 1

\el C-)

wzt 712612005 Page 1 COMPASS vl.0.0 COMPASS v11.0.0 712612005 Page I

Surface Soil Survey Plan Survey Plan Summary Site: TRENCH OL1-6 Planner(s): BHB Survey Unit Name: Temporary Water Supply Trench Comments: AS-127 to AW-125 Area (m2): 163 Classification: I Selected Test: Sign Estimated Sigma (pCVg): 0.39 DCGL (pCi/g): 4.31 Sample Size (N): 16 LBGR (pCig): 3.8 Estimated Conc. (pCUg): 0.9 Alpha: 0.050 Estimated Power 1 Beta: 0.100 EMC Sample Size (N): 16 Scanning Instrumentation: 2" by 2" Nal (Cs-137 w)

Prospective Power Curve

. -I I_\_ I I -

-I

'I

.- I - -I I I1 1I

_ 0.8 - - - -

- 0.7

. =_ = _ =- - _ -

r 0.6 c

_ 0.5 . I _

0.3

.t

-0.7 I _ _ I _I I= I_=

. _ I_= .i

?a 02 __ =_ ___I

p. 03 1Z

= 0.1 O

==-=-= _ _-I 03 1.0 1S 2.0 25 3.0 35 4.0 4.5 5.0 Soil Concentration (pCi/g), including background

- Power - DCGL - - Estinated Power

- LBGR

• 1-beta 7126/2005 Page 1 vl.O.O COMPASS v1.0.0 712612005 Page I

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

Cs-137 4.31 N/A N/A N/A 3.3 Survey Unit Estimate Reference Area Estimate (Mean +/- 1-Sigma) (Mean +/- 1-Sigma)

Contaminant (pCIlg) (pCI/g)

Cs-1 37 0.87 +/- 0.39 0.28 +/- 0.39 I'-.

2::

0L COMPASS vl.0.000 712612005 Page 2

trt.j - Fv--E S  : . . .

Noaditonl amle arIeurdbcueteata iElevated Measurement Comparison (E No additional samples are requiffed because the actual ecan MDC iclece than the DCGLw.

Enter ina description for the scanning instn measured contaminant Click the CALCUL, results. All entered and calculated scan MI w.O Scanninq Instrumentation

Description:

12' by 2' Nal (Cs-1 37 w)

Contaminant l Scan MDC I (Us-13/ 3.3 NUREG-1 507 Slutlisfic~til Desigrg Hut Spuul Desigrn N: l 16 Actual Scan MDC: F 3.3 Bounded Area (n12): I 10.2 AreaFactor NJA Ares Fact dor N/1 8oundodArea(m5: l NIA DCGLLw: 4.31 Poct-EMC N: I 16 Scan MDC RequirEed: F ~NIA 1W Ernable Trtirniriy Ctrd Helup DACK NDT AT7AC.HMENT

Main Section of Trench Side Wall _10 1

Curved Region of Trench END REGION END REGION End Region of Trench r-*~ Si-de Wa!V--

• - r~4hiFN 41h. G6, -

PRE-REMEDIATION RESULTS Samples of Soil from Trench Area Sample No. Survey or Assay No. pCUg (Cs-137)

SP-1 306-04-1530 22.6 SP-2 306-04-1530 13.5 SP-3 306-04-1530 12 SP-11 306-04-1539 0.10 SP-12 306-04-1539 0.55 SP4 306-04-1539 1.60 SP-5 306-04-1539 6.6 SP-6 306-04-1539 2.35 SP-7 306-04-1539 0.12 SP4 306-04-1557 42.6 SP-5 306-04-1557 11.1 SP-1 306-04-1557 3.9 SP-2 306-04-1557 12.1 SP-3 306-04-1557 6.9 SP-4 306-04-1557 12.2 SP-5 306-04-1557 4.3 SP-6 306-04-1557 7.9 SP-7 306-04-1557 7.4 SP-8 306-04-1557 7.8 SP-1 306-04-1557 20.3 SP-6 306-04-1555 1.30 SP-7 306-04-1555 4 SP-8 306-04-1555 1.18 SP-8 306-04-1529 39.24 SP-9 306-04-1529 12.46 SP-10 306-04-1529 10.85 SP-1 306-04-1529 5.27 SP-2 306-04-1529 7.68 SP-3 306-04-1529 4.54 POST-REMEDIATION RESULTS Samples of Soil from Trench Area Sample No. Survey or Assay No. pCUg (Cs-137)

SP-1 1-21168 1.15 SP-1 1-21170 0.88 SP-1 2-21169 1.12 SP-1 2-21171 0.32 Mean=> 0.87 STDEV=> 0.39 Max=> 1.15 Min=> 0.32 A{x .-C-?.'¢:-. . 4

in G `ni A1I-

,-r , a . E E.rvhlUnt Ib~

urvv Unt Iso~clonCheck Sheet ISurvey D)ate j L'nl :1 1211:31104 OL1-ITime SE-CTjCHAi -SURVSY I1100 U~ri I Suwve' Una.' Locaivrv:

1NEFECTiON D I Ins.-ection Team memoers ID.Sarge CIRF7ION Terripcrary MWete' 'Une Trenct!

culprnmer-.s (Chiec% Ile 3pcr:xnrt2 Ye; Fa-.-cr~ nswer I Yas 'N. N I w~vi.- suffcientriu-1jI-3, li cO.6rl-a~tQitflf Vq crnartocoir'vton. 4tc I been -itmi 'a'h, qurvoy urnrt'7 co rmecurvoys Ilrcm Cueatlon I) demonstr ate triat rMsSurlay unt? will most ttkety ppati nt FSS7 X I

-. ,~ al zots. icnaefrmar~ert aic.cmrnt. and material no? nMedadO to erforn the 7,3 been ranvd Are the rurtvoAy urfacea folativolv free of loose detla ft a. dirt. concrla, dusl, metal 11hlnricatc.17 X I Are th survey zu~ae retativety iree oi liqutas (i.e., water. moisture. cii, etc.p7 f7. Are t(no sj'rmy turl~acw'Ce~ -f ag ;arIm. "WI'.C, flMs V~I-potertimI a.nl:c ractetton?

9 -zv, the -urfac: Mez~urerriertt Test Areas SMTAI t~etn est3wilsl-.ej? C Exb ftZof lfizruc,!cjS)I Fe-'rt X I9 C.

Have the Surface Measurement Tee. Areas (SMTA) catz teen coil~eced? (Refer to Esnblt 2 for instructlen's.)

Ara :a Sura'ej rtaceas eaaSly aczS=- ju sr:wCtnx. N-Cnraacn. at:. is nescat:c.

gang a~ecusto to per!zrrnmhe --337 psric:':e MSS) lx A

I. Is the Wree induatrialiv cafe to verform the F857 (Evaluate potentila fall & 1t1c, hazarcs. confined soace3. 61c.) )t 13 Have ;nOtograprns ceen taxen snowing the overall coflottlon oi the, areM?7

14. Have ail uns -itwac-'crycnel:2nscee rsceO NOC.E: It a No answer is obtained above. the insiector should immediatelv correct the pronlen or Innllatr correctivre acons throug t the responsibie sne depertment, as appilcaole. 0ocument aCuons taken aniot juslifications in mie -comments' section Delow. Attacn aconicnaJ 3neets as necasarl.

!- t Comments:

1Motsia In tijaittion 1: The ;inljnrlnnrs fnr thn .survnv unit have nWt. at this lime, been established. Bamers definino I the trench area to be surveved for FSS will have to be placea orior to settina PRI.

Zl.onnane lin Q(se-tion A- Uecallnnp iiS rnatrnaI r meAn in lrerri, tron'. I SA B~ny nrskpt rnmtl Arlditinnailv a N !nie ercjon embeeided in concrete oart aoorny. 89 in length should be removed orior to FSS. Notified L.

i Shamenek. I I r < sn (!estgmn A WJtar it nrpoenf in lnu.lvinn arpoeq thrnmhnjit trpnrh. Nrifitif I1_d

. *Sharnefik.

aI I. :--rs ':Z~t !:4~ofrbo.. '.

I .

a ~esponse cu %;iuOasiunt iz. ~vaiia or iretwliare iot izacjisizeu coo pesnnoe, ,o trmncri £r.ouio oe dIfle 0(or 1, I1 U N

• I £

'.:r:'i r- .

i*

C; I

4IaaInd w

I* ', ,ncs, fcc innr Inrantleinnl

• Date -

.; _ ZZ_11 -I

• t,... .ii* tIt., 1vsjue' / v .i .. " 7I

APPENDIX A-2

• SR-0189 (OLl-6)

.U .E REQU.E$ C.NIUTO.SET g*SR UMB SR-0189 ARELOCATION East Yard Trench (with surface area of 163 m2 )

..... . .SPECi..C .M. N 'V- INSWuT N ' 4EN'S C a v. - .. d RESULTS

SUMMARY

FOR SR-0189 SR-0189 was issued to collect radiological survey and sample data (FSS) in the temporary water supply trench.

The survey unit covered under this SR is OL1-6 (grids are listed in the SR). The SR required the following radiological measurements:

• Surface Scan Measurements Using a 2' x 2' Sodium Iodide Detector (set to identify Cs-137) - 100% surface scan is required of the grids at a rate not exceeding 10 inches/second at a distance within 4 inches. The action level is 300 gross cpm. If any areas indicate activity exceeding 550 gross cpm, contact the SR Coordinator before proceeding with survey.

• Surface Soil Sampling - Obtain samples in the locations indicated in the SR. (20 total). In addition, obtain samples of areas indicating activity exceeding the action level. If only rock media is available in a sample location, obtain a sample by chipping the rock.

• QC Repeat Measurements - A minimum of 5% of all surface scan measurements and sampling will be re-performed using identical methodology.

• Additional sampling/surveys may be performed at the request of the RSO.

1. Summary of Results A. Surface Scan Measurements (2"x 2" Sodium Iodide Detector) 100% surface scan was performed on the trench walls and bottom.

Results: All areas indicated activity below action level with two exceptions. Static measurements were performed at these areas which indicated two areas exceeding the action level. The range of static measurement results was 312 to 362 gross cpm. Soil samples were obtained of these areas.

B. Surface Soil Sampling Twenty (20) samples were obtained in the locations indicated in the SR. In addition, two samples were obtained in areas indicating activity above the action level and one sample obtained of the sump area.

Results: The highest result indicated 4.1 +/- 0.4 pCig Cs-137, <0.08 pCi/g Co-60. This sample, SX-SL-9257 was obtained from Sample Point #10. Positive Cs-137 samples ranged from 0.09 to 4.1 pCi/g with a typical achieved Co-60 MDA of 0.1 pCi/g. The following table lists the samples and results:

Page 1 of 2

-S.URVEY REQUEST CONTINUTION SHEE R SR-0189 East Yard Trench (with surface area of 163 m2)

MPUNG

.SP.ECIFIC;

A,,P RVEYINS TIUCTONS CrOR E Sample Cs-137 Activity Cs-I 37 Co-60 Activity Location (PCi9g) Uncertainty (PCi9g)

SP-1 0.28 0.09 <0.14 SP-2 0.18 0.08 <0.12 SP-3 0.09 0.05 <0.07 SP-4 <0.1 N/A <0.1 SP-5 <0.13 NIA <0.14 SP-6 <0.1 N/A <0.1 SP-7 <0.08 NIA <0.08 SP-8 0.40 0.07 <0.08 SP-9 0.14 0.07 <0.13 SP-10 4.10 0.4 <0.08 SP-11 1.60 0.2 <0.07 SP-12 0.83 0.04 <0.09 SP-13 <0.1 N/A <0.1 SP-14 <0.1 NIA <0.1 SP-15 <0.1 N/A <0.1 SP-16 0.16 0.06 <0.08 SP-17 <0.14 N/A <0.1 SP-18 <0.14 N/A <0.1 SP-19 2.7 0.29 <0.1 SP-20 0.37 0.08 <0.08 Trench Sump 0.40 0.1 <0.13 AP-1 <0.1 2 NIA <0.1 AP-2 0.18 Mean 0.79 2 Standard Deviations 2.23 Max 4.10 Min 0.09 Median 0.37

2. Quality Control (QC) Measurements and Comparisons

. Repeat Scan/Static measurements and Soil samples were performed and met the applicable acceptance criteria established in Section 4.6 of E900-IMP-4520.04.

3. Exceptions and Discrepancies: Photographs of the surveying and sampling of the trench during FSS were not obtained. This was an oversight of the technicians and the GRCS. Photographs obtained prior to and after the FSS are included in this package as a substitute. Pre-FSS photographs indicate the types of soil and terrain and the post-FSS photographs indicate the sample points.

David Sarge (GRCS) (;zA,4, V

Date S 2b- 05 Page 2 of 2

EM0O-IMP-4520.04 EXHIBIT 10 ORIGIN2oL SURVEY DATA VERIFICATION AND VALIDATION FORM Survey Unit Number OL1-6 SR Number 0189 Check the appropriate answer for each question below. Yes No NIA

1. Was each radiological instrument capable of detecting the radiation of interest at or below the Investigation X level? If not, acceptable compensatory measures have been taken.

2. Did each radiological instrument have a current calibration and were radioactive sources used for calibration traceable to recognized standards or calibration organizations? X

3. Was each radiological instrument source checked daily (before and, where required, after use)? X

4. Were survey team personnel properly trained in the applicable survey techniques, and was the training X adequately documented? _

5. Were the MDCs and the assumptions used to develop them appropriate for the Instruments and survey X methods used to collect the data?

6. Were the survey methods appropriate for the media and types of radiation being measured? X

7. If special measurement methods were used to collect data, were they properly documented in accordance with X approved site procedures?

8. Were the samples adequately tracked from their collection point (Field Sample Collection Sheet) and through X the analysis process in accordance with the SNEC Sample Chain of Custody Program?

9. Were the data collected in accordance with the Survey Design Package and Survey Request? X

10. Were the data representative of current site conditions? X

11. If Survey Request Investigation levels were exceeded, was appropriate action taken? X 12 Were at least 5% of all survey and/or sample points randomly re-sampled and/or re-surveyed using Identical X methodology contained in the Survey Request per Section 4.6.2?

13. Were the samples analyzed In accordance with requirements contained in the Survey Request Sample X Analysis Sheet?

14. Did all sample analyses meet the MDA requirements contained in the Survey Request Sample Analysis Sheet X and Step 4.5.2 (10% of the applicable DCGLs)?

15. Were at least 5% of FSS samples obtained under the Survey Request re-analyzed? Were replicate analysis X calculations performed per Section 4.6.3?

16. Were documented Investigations performed for all survey and/or sample QA/QC non-agreements (Questions X 12 & 15 above) and were corrective actions Implemented as necessary?

17. Has the GRCS summary of surveying/sampling results been completed per Step 4.7.3? X NOTES: If the question does not apply to the survey package, check the N/A (not applicable) box. If a No answer Is obtained above, the GRCS should initiate corrective action in accordance with site procedures. Document actions taken and/or justifications in the 'Comments section below. Attach additional sheets as necessary.

GRCS (prnt/sign) D. Sarge / (i Z_ IDate 01/19/05