ML043500346
| ML043500346 | |
| Person / Time | |
|---|---|
| Site: | Maine Yankee |
| Issue date: | 12/07/2004 |
| From: | Cooper W, Pillsbury G Maine Yankee Atomic Power Co |
| To: | NRC/FSME |
| References | |
| FR-0110 FR-0110-04, Rev 0 | |
| Download: ML043500346 (23) | |
Text
MAINE YANKEE FINAL STATUS SURVEY RELEASE RECORD FR-Ol1O PAB ALLEYWAY SURVEY UNIT 4 Prepared By:
7--
Date:
2-FSS Engineer - Signature Prinfed Name Reviewed By:
Date:
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FSS Specialist - Si nature Reviewed By:
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Date:
/;7D 4isedent(c~v"ieotr P71rintedName Approved By:
Date:
Sre'intende ~t Sinature eS, MOP ignature Printed Name Approved By:
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_Date:
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/'FSS, MOP - Signature Printed Name Revision 0
MAINE YANKEE FINAL STATUS SURVEY RELEASE RECORD FR-0110 PAB ALLEYWAY SURVEY UNIT 4 A. SURVEY UNIT DESCRIPTION Survey Unit FR-01 10-04 is an excavated area that consists of soil and backfill. The excavation was made in order to remove buried pipes running between the PAB and the Containment Spray Building, located near grid coordinates 407,500 N and 623,800 E using the Maine State Coordinate System (West Zone) NAD 1927, as shown on Map FR 0110-00, Attachment 1.
The Alleyway was originally a paved area located above the pipe excavation within the Restricted Area, bordered on the west by the Personnel Hatch, Main Steam Valve House, Reactor Motor Control Center, and the Emergency Feedwater Pump Room, on the east by the Service Building, and by the PAB on the north. The survey unit is 205 m2.
B. SURVEY UNIT DESIGN INFORMATION The area was designated a Class 1 land survey unit per the LTP (Table 5-lC, R0100, RCA Yard West). The Alleyway excavation was begun in late 2002 and the removed soil was spread and surveyed for possible reuse. Nearly all of the removed soil was found to be acceptable for reuse. The soil survey effort was suspended when the ground froze, and upon returning to soil surveying in the spring of 2003, it was determined that radioactivity had migrated into the remaining soil from the open, abandoned pipes in the excavation.
Consequently, significant soil remediation had to be performed. Since the survey unit was already Class 1, no reassessment of classification was required.
The survey unit design parameters are shown in Table 1. Given a relative shift of 1.2, it was determined that 23 direct measurements wvere required for the Sign Test; however, the number of samples was increased because an additional sample point fell within the area when the locations were laid out. Twenty-four direct measurements were actually performed. Measurement locations wvere randomly determined, using a fixed grid with a randomly determined start point, and are illustrated on the map FR 0110-SS-04 (Attachment 1). All direct measurements consisted of soil samples obtained at the required locations. The samples are analyzed with laboratory gamma spectroscopy.
Forty-seven scan grids of approximately 4.4 rn2 were established, as indicated on survey map FR 0110-04. A 100% scan coverage of the area was required. The survey instruments used, their MDCs, and alarm setpoints are provided in Attachment 2. Since the design DCGLENMC is greater than the investigation level, no EMC sample size adjustment is required.
Background values were established for the scan measurements based on local scaler values in the survey unit. These background values were used to establish scan alarm setpoints, and to confirm the scan MDCs used were appropriate.
FR-OI 10-04, Revision 0 Page 2 of 23
TABLE I SURVEY UNIT DESIGN PARAMETERS Survey Unit Design Criteria Basis Area 205 m
< Class I limit per LTP Rev. 3 Based on an LBGR o0 1.6 Number of Direct 23 pCi/g, sigma of 1.33 pCi/g Measurements Required and a relative shift of 1.2 Type I = Type II = 0.05 Sample Area 8.9 m' 205mL/ 23 Sample Grid Spacing 2.9 m x 2.9 m (8.9)p2 Scan Grid Area 4.4 me Area Factor 2.3 (conservative)
LTP Rev, Table 3 6-12 Scan Survey Area 205 m; Class 1 Area-100%
Background
r W'
SSPA-3 (scan)
Average background +
DI 6-150, LTP Section 5 Scan Investigation Level 3 sigma of background EtC-009-0h
, See I)able 2-2 plus BKG (Attachment 2)
DCGL 3.2pCi/e L'I P, Rev 3 and Addenda pg (Reference 3, 4, and 5)
Design DCGLEMC 7.3 Area factor
- DCGL C. SURVEY RESULTS As required, 24 direct soil measurements were made and the results are presented in Table 2.
Two of the direct measurements (SO 17 and S023) were above the DCGL unity fraction. The maximum direct result was 2.28 times the DCGL unity fraction. These grids wvere both remediated, with subsequent resampling. The post-remediation sample results are used in Table 2. The original results are used in the Sign Test. The mean residual activity is 37% of the unity fraction.
Of the 47 grids scanned, 35 required investigation either due to a low background at the start of the scan (3), high background at the start of the scan (5), or because the scan setpoint was exceeded (27). A discussion of the investigation performed in the survey unit is contained in Section D.
It should be noted that the Co-60 DCGL is 0.86 pCi/g. This is an "adjusted DCGL" and can be derived from the unitized dose for surface soil, LTP Table 6-7 and the updated dose model in the activated concrete related license amendment (References 5 and 6). The Co-60 DCGL for surface soil is I pCi/g x 10/6.58 mrem/y (from LTP Table 6-7) or 1.5 pCi/g Co-60. This DCGL is further limited by the dose contribution allowed for surface soil only in the basement fill model per LTP Section 6 Attachment IX (revised LTP Table 6-1 1), in the activated concrete license amendment. Thus, the Co-60 adjusted DCGL is 1.5 pCi/g x 5.63/10 mrem/y or 0.86 pCi/g.
Design sigma from the LTP Rev 3 Table 5-IC for ROIOO, RCA Yard West.
2 Design initially used a DCGL of 3.2 pCi,,g Cs-137. The Cs-137 DCGL was reduced to 2.39 pCi/g (Reference 5).
FR-OI 10-04, Revision 0 Page 3 of 23
TABLE 2 DIRECT MEASUREMENTS SampleNumber Co-60' l Uncertainty l (Cs-3) J Uncertainty l tof Unit Rule FROI 10-04-SOOI
<4.67E-02 4.90E-02 2.OOE-02 0.07 FRO I10-04-S002 1.94E-01 2.51E-02 9.46E-01 7.45E-02 0.62 FRO I10-04-S003 5.79E-02 1.76E-02 1.54E-01 2.68E-02 0.13 FROI 10-04-S004 1.16E-01 2.59E-02 5.85E-01 6.61E-02 0.38 FROI 10-04-SO05 6.90E-02 l.99E-02 1.14E-01 2.65E-02 0.13 FRO I 10-04-S006
<4.01 E-02 6.77E-02 2.43E-02 0.07 FRO 110-04-S007 2.14E-01 2.49E-02 2.57E-01 3.20E-02 0.36 FRO I10-04-S008
<4.62E-02 9.49E-02 2.70E-02 0.09 FRO 110-04-S009 1.40E-01 2.21E-02 9.80E-01 7.51E-02 0.57 FRO 10-04-SO1O 5.09E-02 2.36E-02 7.57E-01 7.01E-02 0.38 FROI 10-04-SOI I
<4.49E-02 2.94E-01 3.67E-02 0.18 FROI 0-04-S012
<3.44E-02 1.O1E-01 2.44E-02 0.08 FRO I10-04-SO 13
<3.72E-02 1.52E-01 2.74E-02 0.11 FRO I10-04-S014
<4.59E-02 1.37E-01 2.62E-02 0.11 FRO I10-04-S015 5.22E-01 3.78E-02 7.63E-01 6.38E-02 0.93 FROI 10-04-SO 16 1.44E-01 2.50E-02 1.75E-01 3.28E-02 0.24
- XRO1 10-04-S030 2.11E-01 3.11E-02 1.65E-01 3.81E-02 0.31 FRO I10-04-SO 18
<4.30E-02 9.67E-02 2.49E-02 0.09 FRO I10-04-SO 19 5.31E-01 4.42E-02 6.33E-01 6.33E-02 0.88 FRO I10-04-S020 5.05E-01 4.20E-02 8.2 1E-01 7.29E-02 0.93 FRO I10-04-S021 2.18E-01 3.02E-02 3.67E-01 4.72E-02 0.41 FRO I10-04-S022 5.17E-01 3.70E-02 7.72E-01 6.24E-02 0.92
- XRO 10-04-S028 3.42E-01 3.50E-02 4.59E-01 5.18E-02 0.59 FROI 10-04-S024 1.46E-01 2.43E-02 1.37E-01 2.98E-02 0.23 Mean 1.80E-01 3.78E-01 0.37 Median I.28E-01 2.16E-01 0.28 Standard Deviation 1.74E-01 3.15E-01 0.30 Range 0.034 to 0.53 0.049 to 0.98 0.075 to 0.93
"<" indicates values less than the minimum detectable activity (MDA)
The sample results exceeded the unitized DCGL. The area was remediated and the post remediation sampling results are reported in the table. The Sign Test was performed using the original sample results (see Attachment 4).
FR-01 10-04, Revision 0 Page 4 of 23
D. SURVEY UNIT INVESTIGATIONS PERFORMED AND RESULTS Survey Unit 4 was partitioned into 47 grids as shown on map FR 0110-04 (Attachment 1).
Of the 47 grids, 35 required investigation either due to a low background at the start of the scan, high background at the start of the scan, or because the scan setpoint was exceeded. In addition, two direct measurements exceeded the DCGL. These were subsequently investigated and remediated as noted above.
Investigation of the scan grids consisted of a 100% scan with the SSPA-3. The highest reading in the grid 'was flagged and a soil or rock sample was collected for laboratory gamma analysis.
The results of the investigations are shown in Attachment 3. Detectable concentrations of Co-60 and/or Cs-137 were found in 24 of the investigated grids with four having sample activity exceeding the DCGL. Three of these four grids were resampled post-remediation. The post-remediation sample results are used for the Elevated Measurement Comparison test shown in Table 3-1. During bounding surveys following remediation, one additional grid (S024) was found to exceed the DCGL. These results are also included in Table 3-1. Samples from the other investigated grids did not show positive Co-60 or Cs-I 37, and so, for purposes of the EMC test, were assumed to be present at the observed MDA. The investigation results are summarized in Attachment 3 (Table 3-1).
E. SURVEY UNIT DATA ASSESSMENT An analysis of the direct sample measurement results, including the mean, median, standard deviation, and sample result range, are provided in Table 2. Of the 24 soil/rock samples, none had concentrations of Co-60 and Cs-137 that exceeded unity post-remediation. The average of the DCGL unity fractions was 0.37 and the maximum unity fraction (after remediation) was 0.93 times the DCGL. The Elevated Measurement Comparison unity limit test was applied to the investigation data. The EMC test was 78% of unity, passing the EMC test. Final sigma was less than the design sigma; therefore, no additional samples were required. It should be noted that although the two direct measurements with activity above the DCGL are not included in Table 2, the original results were used in the Sign Test.
For illustrative purposes, as indicated in LTP Section 5.9.3, a simplified general retrospective dose estimate can be calculated from the average residual contamination level by subtracting the established mean fallout Cs-137 background value3 (0.19 pCi/g) for disturbed soil from the survey unit sample mean Cs-137 activity (0.378 pCi/g). The result is a net value of 0.188 pCi/g. When the survey unit mean for Co-60 (0.180 pCi/g) is included, this would equate to an annual dose rate of 1.6 mrem/y4. However, for the purposes of demonstrating compliance with the radiological criteria for license termination and the enhanced State Criteria, background activity is not subtracted from the soil sample analysis activity values.
3 See Attachment E to Maine Yankee Procedure PMP 6.7.8 (Reference 2) 4 Based on 5.63 mrem/yat the DCGL per the LTP and Addenda (0.188/2.39 + 0.18010.86)
- 5.63.
FR-01 10-04, Revision 0 Page 5 of 23
F. ADDITIONAL DATA EVALUATION provides additional data evaluation associated with this Survey Unit, including relevant statistical information. Based on survey unit direct measurement data, this attachment provides the Sign Test Summary, Quantile Plot, Histogram, and Retrospective Power Curve.
- 1. The Sign Test Summary provides an overall summary of design input and resulting calculated values used to determine the required number (N) of direct measurements (per LTP Section 5.4.2). The Sign Test Summary is a separate statistical analysis that also calculates the mean, median, and standard deviation of the direct measurements.
The critical value and the result of the Sign Test are provided in the Sign Test Summary table, as well as a listing of the key release criteria. As is shown in the table, all of the key release criteria, except two samples had activity above the unitized DCGL, were satisfied for the FSS of this survey unit. The elevated measurements were appropriately evaluated and found acceptable. It should be noted that due to the change in the DCGL (2.39 pCi/g vs 3.2 pCi/g), the final Sign Test summary was evaluated with a type II error equal to 0.20.
- 2. The Quantile Plot was generated from direct measurement data listed in Table 2. The data set and plot are consistent with expectations for a Class I survey unit..The-survey unit average is well below the DCGLs of 0.86 pCi/g and 2.39 pCi/g for Co-60 and Cs-137 respectively.
- 3. A Histogram Plot was also developed based on the direct measurement values. This plot shows that the direct data were essentially a normal distribution with no outliers.
- 4. A Retrospective Power Curve was constructed, based on FSS results. The curve shows that this survey unit having a mean residual activity at a small fraction of the DCGL has a high probability ("power") of meeting the release criteria. Thus, it can be concluded that the direct measurement data support rejection of the null hypothesis, providing high confidence that the survey unit satisfied the release criteria and that the data quality objectives were met.
G. CHANGES IN INITIAL SURVEY UNIT ASSUMPTIONS ON EXTENT OF RESIDUAL ACTIVITY The survey was designed as a Class I area; the FSS results were consistent with that classification. The direct measurement sample standard deviation was less than the design sigma. Thus, no additional measurements wvere required. Since the DCGLs were changed (decreased) by addendum to the LTP to account for the activated containment concrete pathway the design of the survey unit was confirmed and data reviewed against the revised DCGLs.
FR-O 10-04, Revision 0 Page 6 of 23
H. LTP CHANGES SUBSEQUENT TO SURVEY UNIT FSS The FSS of Survey Unit 4 wvas designed and performed per the criteria LTP Rev. 3 with Addenda (Reference 3 and 4). The subsequent LTP change with potential impact to this FSS requiring evaluations was the LTP change related to the activated concrete license amendment (Reference 5 and 6) which reduced the DCGLs for soil inside the RA.
These changes were evaluated and found to have no impact on the FSS results or conclusions for this survey unit. The revised DCGLs were used for the evaluation of the results included herein.
I. CONCLUSION The FSS of this survey unit was designed based on the LTP designation as a Class 1 area.
The survey design parameters are presented in Table 1. The required number of direct measurements was determined for the Sign Test in accordance with the LTP. As presented in Table 2, the average of the direct measurements was %vell below the DCGL unity.
A Sign Test Summary analysis demonstrated that the Sign Test criteria were satisfied with type II error of 0.20. The direct measurement sigma was determined to be less than that used for design, thus indicating that a sufficient number of samples was taken.
The Retrospective Power Curve shown in Attachment 4 confirmed that sufficient samples were taken to support rejection of the null hypothesis, providing high confidence that the survey unit satisfied the release criteria and the data quality objectives were met. Attachment 4 also revealed that direct measurement data represented essentially a normal distribution with no outliers.
The scan survey design for this survey unit was developed in accordance with the LTP with significant aspects of the design discussed in Section B and Table 1. Verified alarms were investigated and the survey unit meets the Elevated Measurement Comparison unity rule per LTP methodology.
It is concluded that FROI 10 Survey Unit 4 meets the release criteria of IOCFR20.1402 and the State of Maine enhanced criteria.
FR-OI 10-04, Revision 0 Page 7 of 23
J. REFERENCES
- 1. Maine Yankee Calculation EC-009-01
- 2. Approach for Dealing with Background Radioactivity for Maine Yankee Final Status Surveys, Attachment E to Maine Yankee Procedure PMP 6.7.8, FSS Data Processing and Reporting
- 3. Maine Yankee License Termination Plan, Revision 3, Maine Yankee letter to the NRC, MN-02-048, dated October 15, 2002
- 4. Maine Yankee License Termination Plan, Revision 3 Addenda, Maine Yankee letter to the NRC, MN-02-061, dated November 26, 2002
- 5. Proposed License Amendment Related to Changes in the Activated Concrete Remediation Plans, Maine Yankee letter to the NRC, MN-03-049, dated September 11, 2003
- 6. Issuance of License Amendment No. 170, NRC letter to Maine Yankee, dated February 18, 2004 FR-OI 10-04, Revision 0 Page 8 of 23
Attachment I Survey Unit Maps FR-O1 10-04, Revision 0 Page 9 of 23
aine Yankee M
i ec Map ID#: FR 0110-00 Decommissioning Team Maine Yankee Decommissioning Project Surve Form Survey Type:
a Characterization El Turnover X Final Status Survey Survey Area Name: Alleyway Excavation Date: 625-03 623,000 E FOXBIRD ISLAND tAO NNEABA~Y POINTY 624,500 E POICNTI
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Z SCALE (f t) 0 400 800 1200 MN L--
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N FR-Ol 10-04, Revision 0 PEacye IO nf?
Final Status Survey Unit Reference Map Alleyway Piping Excavation Pit 0
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Containment MSvH Slab
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- Area to be surveyed at a later date Restricted Area Alleyway as part of FRO1I1, Survey Unit 14 Plan View
aine Yankee M
i S
Map ID #: FR 0110-04 Decommissioning Team MaIne YankeeIDecommissionigProjectSurve Form Survey Type:
0 Characterization 0 Tumover 1 Final Status Survey Survey Area Name: Alleyway Excavation IDate: 6-25-03 FR 0110-04: Alleyway Piping Excavation Pit Soil Area South of PAB Wall Survey Scan 01-47
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VZ C) 0 le I0-Q5 ZZ FR-01 10-04, Revision 0 Page 12 of 23 0
5m 1Gm 15m
_'IIIi
- I" This survey area unit is approximately 205 square meters
Maine Yankee Decommissioning Team Map ID#: FR 0110-SS-04 Maine Yankee Decommissioning Project Survej' Form Survey Unit 04 Survey Type:
0 Characterization 0 Turnover 1 Final Status Survey Survey Area Name: Alleyway Excavation IDate: 7-7-03 FR 01 1 0-SS-04, Direct Point Survey, Soil Survey Unit 04 Alleyway Piping Excavation Pit Soil Area South of PAB Wall
'*f~*-N 0.83m
-_If 0.40m 2.90m, TYP.
FR-Ol 10-04, Revision 0 Page 13 of 23 L=2.9, N=23 This survey area unit is approximately 205 square meters Survey Unit Instrumentation FR-OI 10-04, Revision 0 Pane 14 of 23
TABLE 2-1 INSTRUMENT INFORMATION E-600 S/N l
Probe SIN (type) 1929 725890 (SSPA-3) 1625
.725890 (SSPA-3) 1929 725328 (SSPA-3) 2489 725890 (SSPA-3) 2489 726560 (SSPA-3)
IHPGc Detectors for Lab Analysis of Volumetric Samples I
Detector Number I
MDC (pCi/g)
FSS-1 0.04 -0.10 FSS-2 0.04 -0.10 DET2 0.10 (nominal)
DET3 0.1O (nominal)
TABLE 2-2 INSTRUMENT SCAN MDC, DCGL, INVESTIGATION LEVEL, AND DCGLENIC Detector
[
SSPA-3 J
Comments Scan MDC Design Scan MDC, LTP (pCi/g)
Table 5-6 (Reference 4)
DCGL 2.39 Cs-137 Reference 5 (pCi/g) 0.86 Co-60 Investigation Level 3 sigma of Background (Alarm Setpoint) 17,050 to 18,890 plus Background cpm CpGLMC.
9.3 Cs-137 DCGL
- AF (3.9 as performed)
(pCilg) 3.3 Co-60 I
FR-O 1 10-04, Revision 0 Page 15 of 23 Investigation Table FR-0 I 10-04, Revision 0 Page 16 of 23
TABLE 3-1 INVESTIGATION TABLE*
INITIAL SURVEY INVESTIGATION RESULTS Alarm Alarm Max.1 Scan DCGLESICI Scan Are Area i
Co-60 lCs-137 DCGLrmc Grd epon Valu Value' a Factor UntA SmlFNme (pCi/g)
-~iig Unity
__ cpm cpm cpm A
_ _ III SOO1 17050 19000 17580 4.4 3.9 3.9 XR0 110041 S0O ISS 2.66E-01 3.24E-02 2.97E-01 4.45E-02
<DCGL S003 17050 17200 19450 4.4 3.9 3.9 XRO1 10041 S002SS 9.97E-02 2.05E-02 1.60E-01 2.85E-02
<DCGL S004 17050 17270 16390 4.4 3.9 3.9 XROI 10041SO03SS 5.97E-01 5.01E-02 8.68E-01 8.33E-02 0.18 S005 17050 17430 15300 4.4 3.9 3.9 XRO1 10041 S004SS 4.08E-01 3.44E-02 5.45E-01 5.27E-02
<DCGL S006 17050 17810 18460 4.4 3.9 3.9 XRO110041 S005SS 4.OOE-01 3.45E-02 6.51E-01 6.24E-02
<DCGL S007 17050 17650 17150 4.4 3.9 3.9 XRO 110041 S006SS 5.69E-02 2.41 E-02 5.50E-02 2.17E-02
<DCGL S008 18890 19450 20100 4.4 3.9 3.9 XRO110041 SOOI RS < 1.27E-01
< 1.04E-01
<DCGL S009 18890 19760 19660 4.4 3.9 3.9 XRO110041 S007SS 4.76E-01 3.75E-02 6.53E-01 5.88E-02
<DCGL S010 17050 17890 18740 4.4 3.9 3.9 XRO I 10041S029SS 8.81E-02 2.13E-02 1.63E-01 2.96E-02
<DCGL S013 17050 17690 19080 4.4 3.9 3.9 XRO1 10041 S009SS 6.04E-02 1.78E-02 6.49E-02 2.33E-02
<DCGL S014 18890 hb 22100 4.4 3.9 3.9 XRO110041S002RS < 1.24E-01
< 1.22E-01
<DCGL S015 18890 20400 19820 4.4 3.9 3.9 XRO 110041 S01OSS 1.03E-01 2.16E-02 1.17E-01 2.69E-02
<DCGL S016 18890 hb 20300 4.4 3.9 3.9 XRO1 10041 S003 RS < 1.05E-01
< 9.45E-02
<DCGL S017 18890 hb 22300 4.4 3.9 3.9 XR0110041 S004RS < 1.23E-01
< 9.96E-02
<DCGL S018 18890 21100 21400 4.4 3.9 3.9 XROI10041SO05RS < 1.131E-01
< 9.59E-02
<DCGL S019 18890 21000 19750 4.4 3.9 3.9 XROI 10041S011 SS 2.06E-01 2.69E-02 3.15E-01 3.86E-02
<DCGL S022 18890 20000 19580 4.4 3.9 3.9 XRO1 10041S006RS < 7.72E-02
< 7.07E-02
<DCGL S023 18890 19070 19270 4.4 3.9 3.9 XRO I 10041 S03 ISS 3.74E-01 3.38E-02 6.53E-01 6.10E-02
<DCGL S024 18890 20000 19770 4.4 3.9 3.9 XRO I 10041S032SS 7.70E-01 5.69E-02 9.77E-01 8.96E-02 0.24 S025 18890 hb 20700 4.4 3.9 3.9 XROI 10041S033SS 2.68E-01 3.06E-02 3.79E-01 4.32E-02
<DCGL S026 18890 23000 20700 4.4 3.9 3.9 XR0110041S007RS < 1.OOE-01
< 8.56E-02
<DCGL FR-01 10-04, Revision 0 Page 17 of 23
INITIAL SURVEY INVESTIGATION RESULTS Alarm Alarmn Max.I Scan DCGEI Grid Setpoint Value Scan Area Area UDLni SamleCNumber Co-60 Cs-137
+1-DCGLEMC p
p Value '
2 Factor UntA SmlFNme (pCi/g)
(pCilg)
I Unity cpm cpm I M
- A S027 18890 21600 19660 4.4 3.9 3.9 XRO1 10041 S008RS < 1.07E-01
< 9.62E-02
<DCGL S028 18890 19940 19060 4.4 3.9 3.9 XR0I 10041 S015SS 3.24E-01 3.16E-02 4.07E-01 4.40E-01
<DCGL S029 18890 19290 19250 4.4 3.9 3.9 XR0110041 SO14SS 4.42E-02 2.39E-02 1.36E-O1 2.66E-02
<DCGL S031 18890 lb 15400 4.4 3.9 3.9 XRO 110041 SOI7SS < 4.79E-02 6.08E-02 2.39E-02
<DCGL S032 18890 21000 19420 4.4 3.9 3.9 XR0110041S009RS < 8.90E-02
< 8.23E-02
<DCGL S033 18890 19420 20100 4.4 3.9 3.9 XRO1 10041 S018SS 2.73E-01 3.01E-02 3.41E-01 4.32E-02
<DCGL S035 18890 23400 21700 4.4 3.9 3.9 XRO1 10041 S019SS 1.55E-01 2.53E-02 5.42E-O1 5.71E-02
<DCGL S036 18890 19170 19090 4.4 3.9 3.9 XRO1 10041 S020SS 5.90E-02 1.90E-02 1.68E-01 3.35E-02
<DCGL S037 18890 lb 17350 4.4 3.9 3.9 XROI 10041S021SS 6.78E-02 2.89E-02 4.18E-01 5.28E-02
<DCGL S039 18890 lb 15370 4.4 3.9 3.9 XR0110041 S022SS < 4.71 E-02 1.05E-01 2.48E-02
<DCGL S040 18890 19220 19670 4.4 3.9 3.9 XR0110041 SO IORS < 1.16E-0
< I.05E-01
<DCGL S041 18890 19080 18800 4.4 3.9 3.9 XR0110041 SO IIRS < 9.91 E-02
< 8.96E-02
<DCGL S042 18890 19120 19540 4.4 3.9 3.9 XRO 110041 S023SS < 5.3 1 E-02 3.20E-O1 4.28E-02
<DCGL S043 18890 hib 20200 4.4 3.9 3.9 XRO1 10041 S024SS 1.09E-01 2.12E-02 5.OOE-U1 4.93E-02
<DCGL Unit mean 1.80E-01 3.78E-01 0.37 EMC Unity Sum 0.78
=
=
-=
=-
=
lb - investigated due to low background in the grid hib - investigated due to high background in the grid
"<" indicates values less than the minimum detectable activity (MDA)
FR-01 10-04, Revision 0 Page 18 of 23 Statistical Data FR-OI 10-04, Revision 0 Page 19 of 23
Survey Package FRO1I10 Unit 4 UNITY Soil Sign Test Summary a ao n
<mm.,
Survey Package:
FROI 10 Alleyway Excavation Survey Unit:
041 Evaluator:
WJC DCGL,:
1.00E+00 Based on 2.39 pCilg DCGL DCGLemc:
3.90E+00 LBGR:
5.00E-01 Sigma:
5.66E-01 Type I error 0.05 Type II error:
0.2 increased Type II error to 20%
Nuclide:
UNITY Soil Type:
N/A Z,,:
1.645 Za:
0.842 Sign p:
0.788145 Calculated Relative Shift:
0.8 Relative Shift Used:
0.8 Uses 3.0 if Relative Shift is >3 N-Value:
19 N-Value+20%:
23 Number of Samples:
24 Median:
2.99E-01 Uses pre-remediation data Mean:
4.76E-01 Uses pre-remediation data Net Sample Standard Deviation:
5.17E-01 Uses pre-remediation data Total Standard Deviation:
5.17E-01 Sum of samples and reference Maximum:
2.28E+00
.... s'.,<. \\}
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.o Adjusted N Value:
24 S+ Value:
22 Uses pre-remediation data Critical Value:
16 Sign test results:,
Pass
^, ; it-
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Sufficient samples collected:
Pass Maximum value <DCGL,:
Investigate Meanc1.0, sign test passes Median value <DCGL-:
Pass Mean value <DCGL,:
Pass Maximum value <DCGLem-:
Pass Total Standard Deviation <Sigma:
Pass Criteria comparison results:
Investigate Mean<1, sign test passes Thef' sure uit;;
prwmaFinaSses all i
s Invt e mean sign p es, S p IThe survey unit passes allconditions:l Investigat~emean<1, sign passes, SU passes FROI 10-SU4a-Soi1Sign-UN1TY.xis 12/7/04 10:57 AM FR-01 10-04, Revision 0 Page 20 of 23
FR-0110 SU-4 Quantile Plot 0.9 0.8
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0.5 t*Activity (unitized) 0
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-Median (unitized)l a, 0.3-.4
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25 50 75 100 Percent
Page/Date/Time Database Variable One-Sample T-Test Report 2
12/7/04 3:17:03 PM C:\\Program Files\\NCSS97\\FR01 1 OSU4.SO C2 Plots Section Histogram of FR-01 10, SU-4 0
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FR-OI 10-04, Revision 0 Page 22 of 23
One-Sample T-Test Power Analysis Page/Date/Time 2
1217/04 3:17:48 PM Chart Section I-a),
0a-1.0-0.8-0.6-0.4-0.2-0.00 Retrospective Power Curve I
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