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| number = ML090830313
| number = ML090830313
| issue date = 03/20/2008
| issue date = 03/20/2008
| title = Rancho Seco Final Status Survey Report for March 20, 2008, Industrial Area Central Yard - North and West of the Maintenance Building, Survey Unit F8000102
| title = Final Status Survey Report for March 20, 2008, Industrial Area Central Yard - North and West of the Maintenance Building, Survey Unit F8000102
| author name =  
| author name =  
| author affiliation = Sacramento Municipal Utility District (SMUD)
| author affiliation = Sacramento Municipal Utility District (SMUD)
Line 17: Line 17:


=Text=
=Text=
{{#Wiki_filter:Rancho Seco Final Status Survey Summary Report March 20, 2008 Industrial Area Central Yard -North and West of the Maintenance Building Survey Unit F8000102 Prepared ByQ Reviewed Approved Date:.__________
{{#Wiki_filter:Rancho Seco Final Status Survey Summary Report March 20, 2008 Industrial Area Central Yard - North and West of the Maintenance Building Survey Unit F8000102 Prepared ByQ         *      *.*          Date:.__________
Date:   4__ i Date: "_- --" Radiological (FINAL STATUS SURVEY  
Reviewed                                    Date: * *L 4__   i Date:   "_- - - "
Approved Radiological
 
(
FINAL STATUS SURVEY  


==SUMMARY==
==SUMMARY==
REPORT Survey Unit: F8000102, Industrial Area Central Yard -North and West of the Maintenance Building Survey Unit
REPORT Survey Unit:
F8000102, Industrial Area Central Yard - North and West of the Maintenance Building Survey Unit


== Description:==
== Description:==


Operating History: This area covers the majority of Industrial Area soils exclusive of the building footprints and rail line in this area. Operating records and the HSA document no specific release of radioactivity' in these survey areas however this area does border known contaminated areas. The HSA recorded no specific unplanned release events.Site Characterization:
Operating History: This area covers the majority of Industrial Area soils exclusive of the building footprints and rail line in this area. Operating records and the HSA document no specific release of radioactivity' in these survey areas however this area does border known contaminated areas. The HSA recorded no specific unplanned release events.
Soil and sediment samples were collected and analyzed for the presence of plant-derived radionuclides.
Site Characterization: Soil and sediment samples were collected and analyzed for the presence of plant-derived radionuclides. Cs-137 was the only detected nuclide of plant origin with a mean activity level of 0.062 pCi/g and a maximum value of 0.299 pCi/g.
Cs-137 was the only detected nuclide of plant origin with a mean activity level of 0.062 pCi/g and a maximum value of 0.299 pCi/g.(Site background levels of Cs-137 have been determined to be approximately 0.312 pCi/g.) As described in section 2 of the LTP, the area was evaluated using DSIP-0020 and was designated as Class 3.Survey Unit Design Information:
(Site background levels of Cs-137 have been determined to be approximately 0.312 pCi/g.) As described in section 2 of the LTP, the area was evaluated using DSIP-0020 and was designated as Class 3.
The Survey Unit Design Parameters'are presented in Table 1 below. The survey unit and measurement locations are depicted on the maps in Attachment  
Survey Unit Design Information:
: 1. Direct measurement locations were randomly determined and 414 m2 were scanned for approximately 23%coverage.
The Survey Unit Design Parameters'are presented in Table 1 below. The survey unit and measurement locations are depicted on the maps in Attachment 1. Direct measurement locations were randomly determined and 414 m2 were scanned for approximately 23%
Soil samples were collected at each direct measurement location and analyzed by HPGe detector.
coverage. Soil samples were collected at each direct measurement location and analyzed by HPGe detector. The instrumentation used for the survey along with the MDC values are listed in Tables 2-1 and 2-2 in Attachment 2.
The instrumentation used for the survey along with the MDC values are listed in Tables 2-1 and 2-2 in Attachment 2.Page 2 of 7 FSS Summary Report'F8000102 Table 1. Survey Unit Design Parameters Survey Design Parameter Value I Comment Survey Area: F800 Survey Unit: Class: SU Area (m2): Evaluator:
Page 2 of 7                         FSS Summary Report                           'F8000102
DCGL Cs137 surrogate (pCi/g): Area Factor: Design DCGLemc (pCi/g): LBGR (pCi/g): Design Sigma (pCi/g): Type I Error: Type II Error: Nuclide: Sample Area (m2): Total Area Scanned (m 2): Scan Coverage (%): Zl-a, : Sign P: Calculated Relative Shift: Relative Shift Used: N-Value: Design N-Value + 20%: Grid Spacing L: 0102 3 1800 Gary Frank 51.2 N/A N/A 25.6 0.01 0.05 0.05 Cs137 N/A 414 23%1.645 1.645 0.99865 2560 3 11 14 N/A Industrial Area Central Yard -North and West of the Maintenance Building Open Land Area LTP Table 5-4 Class 3 Class 3 Default = 50% DCGL DTBD-06-001, Table 5-4D Class 3 Class 3 Uses 3.0 if Rel Shift >3 NUREG-1575 Table 5-5 Class 3-Page 3 of 7 FSS Summary Report F8000102 Survey Results: A total of 14 direct measurements were made in F8000102.
 
The results including mean, median, standard deviation and range are shown in Table 2. All of the direct measurements were less than the DCGL. None of the scan measurements indicated areas of elevated activity above MDA with Cs-137 having a MDA from 0.245 to 0.313 pCi/g and Co-60 having an MDA from 0.156 to 0.237 pCi/g. Soil samples were counted to the MDC shown in Table 2-1 of Attachment 2.Table 2. Direct Measurement Results (all activity values in pCi/g)Measurement ID Cs137 MDA Cs137 Activity Uncertainty Mean: 5.45E-01 Median: I 7.86E-01 Standard Deviation: , : 3.82E-01 Range: 4.81E-02 to 9.15E-01 F8000102A0001GD 8.29E-01 < 8.29E-01 F8000102SOO01SS 5.09E-02 < 5.09E-02 F8000102A0002GD 9.15E-01 < 9.15E-01 F8000102S0002SS 6.04E-02 < 6.04E-02 F8000102A0003GD 7.89E-01 < 7.89E-01 F8000102S0003SS 4.8 1E-02 < 4.8 1E-02 F8000102A0004GD 7.82E-0 1 < 7.82E-0 1 F8000102S0004SS 5.35E-02 < 5.35E-02 F8000102A0005GD 7.59E-01 < 7.59E-01 F8000102S0005SS 5.13E-02 < 5.13E-02 F8000102A0006GD 7.99E-01 < 7.99E-01 F8000102A0007GD 8.34E-01 < 8.34E-01 FS000102A0008GD 8.02E-01 < 8.02E-01 F8000102A0009GD 8.50E-01 < 8.50E-01 Page 4 of 7 FSS Summary Report F8000102 Survey Unit Data Assessment:
Table 1. Survey Unit Design Parameters Survey Design Parameter               Value             I         Comment Survey Area:                     F800     Industrial Area Central Yard - North and West of the Maintenance Building Survey Unit:                     0102    Open Land Area Class:                           3  LTP Table 5-4 SU Area (m2):                     1800 Evaluator:               Gary Frank DCGL Cs137 surrogate (pCi/g):                       51.2 Area Factor:                       N/A    Class 3 Design DCGLemc (pCi/g):                         N/A    Class 3 LBGR (pCi/g):                     25.6    Default = 50% DCGL Design Sigma (pCi/g):                     0.01    DTBD-06-001, Table 5-4D Type I Error:                       0.05 Type II Error:                       0.05 Nuclide:                   Cs137 Sample Area (m2):                     N/A    Class 3 Total Area Scanned (m2):                       414 Scan Coverage (%):                       23%      Class 3 Zl-a, :                   1.645 1.645 Sign P:                 0.99865 Calculated Relative Shift:                     2560 Relative Shift Used:                           3  Uses 3.0 if Rel Shift >3 N-Value:                         11 Design N-Value + 20%:                             14  NUREG-1575 Table 5-5 Grid Spacing L:                       N/A     Class 3
The survey design required 14 direct measurements for the Sign Test. The critical value and the results of the Sign Test are presented in Table 3. The sample mean and median values were less than the DCGL. The sample standard deviation was greater than the design standard deviation, but both values of sigma resulted in a relative shift greater than three (3), no additional samples were required.Page 5 of 7 FSS Summary Report F8000102 Table 3. Data Assessment Results Survey Results Parameter Value Comment Actual Direct Measurements (N): 14 Median (pCi/g): 7.86E-01 Mean (pCi/g): 5.45E-01 Standard Deviation (pCi/g): 3.82E-01 Maximum (pci/g): 9.15E-01 Sign Test Final N Value: 14 S+ Value: 14 Critical Value: 9 Sufficient Samples Collected:
-Page 3 of 7                    FSS Summary Report                          F8000102
Yes Maximum Value < DCGL: Yes Median Value < DCGL: Yes Mean Value < DCGL: Yes Maximum Value < DCGLemc: N/A Class 3 Standard Deviation  
 
<= Sigma: Investigate  
Survey Results:
<0.5 DCGL Pass the Sign Test? Yes Reject the Null Hypothesis?
A total of 14 direct measurements were made in F8000102. The results including mean, median, standard deviation and range are shown in Table 2. All of the direct measurements were less than the DCGL. None of the scan measurements indicated areas of elevated activity above MDA with Cs-137 having a MDA from 0.245 to 0.313 pCi/g and Co-60 having an MDA from 0.156 to 0.237 pCi/g. Soil samples were counted to the MDC shown in Table 2-1 of Attachment 2.
Yes The survey unit passes all conditions?
Table 2. Direct Measurement Results (all activity values in pCi/g)
Investigate  
Measurement ID              Cs137 MDA                  Cs137 Activity    Uncertainty Mean:                  *''                5.45E-01 Median: I                    *.             7.86E-01 Standard Deviation:            ,:
<0.5 DCGL -Survey Passes Page 6 of 7 FSS Summary Report F8000102 Survey Unit Investigations and Results: No investigations were required for either direct or scan measurements and no investigation results are reported.ALARA Statement:
* 3.82E-01 Range:                              4.81E-02 to 9.15E-01 F8000102A0001GD                8.29E-01                    < 8.29E-01 F8000102SOO01SS                5.09E-02                    < 5.09E-02 F8000102A0002GD                9.15E-01                   < 9.15E-01 F8000102S0002SS                6.04E-02                   < 6.04E-02 F8000102A0003GD                7.89E-01                   < 7.89E-01 F8000102S0003SS                4.8 1E-02                   < 4.8 1E-02 F8000102A0004GD                7.82E-0 1                  < 7.82E-0 1 F8000102S0004SS                5.35E-02                   < 5.35E-02 F8000102A0005GD                7.59E-01                   < 7.59E-01 F8000102S0005SS                5.13E-02                   < 5.13E-02 F8000102A0006GD                7.99E-01                    < 7.99E-01 F8000102A0007GD                8.34E-01                    < 8.34E-01 FS000102A0008GD                8.02E-01                   < 8.02E-01 F8000102A0009GD                8.50E-01                    < 8.50E-01 Page 4 of 7                       FSS Summary Report                          F8000102
As stated in Chapter 4 of the LTP, as long as the residual activity within the survey unit is less than the DCGL, the ALARA criterion has been met.Changes in Initial Survey Unit Assumptions:
 
The survey unit was designed as a Class 3 land survey and the sample results are consistent with that classification.
Survey Unit Data Assessment:
The variability of the survey results was greater than the characterization data used for survey design. No potential areas of elevated activity were detected.Conclusion:
The survey design required 14 direct measurements for the Sign Test. The critical value and the results of the Sign Test are presented in Table 3. The sample mean and median values were less than the DCGL. The sample standard deviation was greater than the design standard deviation, but both values of sigma resulted in a relative shift greater than three (3), no additional samples were required.
The FSS of this survey unit was properly designed as a Class 3 survey based on Table 5-4 of the LTP. The required number of direct measurements was made and the scan coverage met the requirement of Table 5-6 of the LTP. All of the direct measurements were less than the DCGL. No investigations were required.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.It is concluded that survey unit F8000102 meets the release criteria of 1OCFR20.1402.
Page 5 of 7                        FSS Summary Report                            F8000102
Page 7 of 7 FSS Summary Report F8000102 Attachment 1 Maps March 20, 2008 Survey Unit F8000102 F8000102-Page 2 of 4 Att. 1 Maps F8000102 F8000102-M2 Page 3 of 4 Att. 1 Maps F8000102 F8000102 -M2A Page 4 of 4 Att. 1 Maps F8000102 Attachment 2 -Instrumentation March 20, 2008 Survey Unit F8000102 Table 2-1. Survey Unit Instrumentation Detector Detector Serial Instrument Model No. MDC No.HPGe N/A 05069128 Soil -0.0604 pCi/g Cs-137 Inspector N/A 08051294 Asphalt -0.915 pCi/g Cs- 137 Soil -0.272 pCi/g Cs-137 ISOCS N/A 2983947 Soil -0.178 pCi/g Co-60 Asphalt -0.313 pCi/g Cs- 137 Table 2-2. Investigation Criteria and DCGL Instrument Parameter Value Soil -26.3 pCi/g Cs-137 ISOCS Investigation Criteria -Scan Soil -6.3 pCi/g Co-60 Asphalt -26.3 pCi/g Cs- 137 Inspector Investigation Level -Asphalt -26.3 pCi/g Cs-137 Inspctor Direct HPGe Investigation Level Soil -26.3 pCi/g Cs-137 Soil -6.3 pCi/g Co-60 All DCGLw 51.2 Cs-137 12.6 Co-60 All DCGLEMC N/A Page 2 of 2 Att. 2 Instrumentation F8000102 Attachment 3 Investigation March 20, 2008 Survey Unit F8000102 (none required)
 
Table 3. Data Assessment Results Survey Results Parameter                Value            Comment Actual Direct Measurements (N):              14 Median (pCi/g):  7.86E-01 Mean (pCi/g):  5.45E-01 Standard Deviation (pCi/g):   3.82E-01 Maximum (pci/g):     9.15E-01 Sign Test Final N Value:           14 S+ Value:           14 Critical Value:           9 Sufficient Samples Collected:         Yes Maximum Value < DCGL:               Yes Median Value < DCGL:             Yes Mean Value < DCGL:             Yes Maximum Value < DCGLemc:                 N/A Class 3 Standard Deviation <= Sigma:     Investigate <0.5 DCGL Pass the Sign Test?         Yes Reject the Null Hypothesis?           Yes The survey unit passes all conditions?   Investigate <0.5 DCGL - Survey Passes Page 6 of 7                     FSS Summary Report                       F8000102
 
Survey Unit Investigations and Results:
No investigations were required for either direct or scan measurements and no investigation results are reported.
ALARA Statement:
As stated in Chapter 4 of the LTP, as long as the residual activity within the survey unit is less than the DCGL, the ALARA criterion has been met.
Changes in Initial Survey Unit Assumptions:
The survey unit was designed as a Class 3 land survey and the sample results are consistent with that classification. The variability of the survey results was greater than the characterization data used for survey design. No potential areas of elevated activity were detected.
 
==
Conclusion:==
 
The FSS of this survey unit was properly designed as a Class 3 survey based on Table 5-4 of the LTP. The required number of direct measurements was made and the scan coverage met the requirement of Table 5-6 of the LTP. All of the direct measurements were less than the DCGL. No investigations were required.
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.
It is concluded that survey unit F8000102 meets the release criteria of 10CFR20.1402.
Page 7 of 7                         FSS Summary Report                             F8000102
 
Attachment 1 Maps March 20, 2008 Survey Unit F8000102
 
F8000102-Page 2 of 4 Att. 1 Maps           F8000102
 
F8000102- M2 Page 3 of 4 Att. 1 Maps             F8000102
 
F8000102 - M2A Page 4 of 4 Att. 1 Maps             F8000102
 
Attachment 2 -
Instrumentation March 20, 2008 Survey Unit F8000102
 
Table 2-1. Survey Unit Instrumentation Detector     Detector Serial Instrument       Model               No.                             MDC No.
HPGe           N/A           05069128                 Soil - 0.0604 pCi/g Cs-137 Inspector       N/A           08051294               Asphalt - 0.915 pCi/g Cs- 137 Soil - 0.272 pCi/g Cs-137 ISOCS           N/A             2983947                 Soil - 0.178 pCi/g Co-60 Asphalt - 0.313 pCi/g Cs- 137 Table 2-2. Investigation Criteria and DCGL Instrument             Parameter                               Value Soil - 26.3 pCi/g Cs-137 ISOCS       Investigation Criteria - Scan           Soil - 6.3 pCi/g Co-60 Asphalt - 26.3 pCi/g Cs- 137 Inspctor Inspector     Direct Investigation Level -               Asphalt - 26.3 pCi/g Cs-137 HPGe       Investigation Level                   Soil - 26.3 pCi/g Cs-137 Soil - 6.3 pCi/g Co-60 All       DCGLw                                         51.2 Cs-137 12.6 Co-60 All       DCGLEMC                                           N/A Page 2 of 2                       Att. 2 Instrumentation                         F8000102
 
Attachment 3 Investigation March 20, 2008 Survey Unit F8000102 (none required)
 
Attachment 4 Data Assessment
Attachment 4 Data Assessment
* March 20, 2008 Survey Unit F8000102 CD)Ci)00j F8000102 Quantile Plot Cs137 DCGL = 51.2 pCi/g U)U.5 U 1.000 0.900 0.800 0.700 0.600 0.500 0.400 0.300 0.200 0.100 0.000 0.786 0 20 40 60 Percentile 80 100 , Activity -Median ---75th Percentile  
* March 20, 2008 Survey Unit F8000102
.... 50th Percentile CD CD 00 C)C: 42 C)F8000102 Scatter Plot Cs137 DCGL = 512 pClIg 2.00E+00-----------------------------------------------------------------.  
 
.69 1.50E+00 1.OOE+00 U0 0 0 0 0 CL 5.500 E-01 ................5 45" 0.OOE+00 0 0 o-5.00E-01 0.602-1.00E+00  
F8000102 Quantile Plot Cs137 DCGL = 51.2 pCi/g 1.000 0.900 0.800                                                                         0.786 0.700 U)
-i i i i I i i i i Measurement Locations I 0 ActIvftv -Averale" -"+3StDev"--  
U  0.600 0.500
"-3StDev'I 0I-TI 00 F8000102 Frequency Plot Cs1 37 DCGL = 51.2 pCi/g a-)C'I)2 LL C 0 a)0 10 9 8 7 6-5 4 3 0 N N Bins -Upper End Value (pCi/g)}}
    .5 U  0.400 CD) 0.300 0.200 0.100 0.000 Ci) 0             20           40               60             80       100 Percentile
                , Activity -     Median - - - 75th Percentile .... 50th Percentile 00j
 
CD F8000102 Scatter Plot Cs137 DCGL = 512 pClIg 2.00E+00
                  -----------------------------------------------------------------.           .69 CD      1.50E+00 1.OOE+00 U0                                       0                               0           0   0 CL 5.500 E-01   .     .   . .       .     .     .     .   .   .   . .     .     .   .   .5 45
    "   0.OOE+00       0                         0o
        -5.00E-01                                                                               0.602
      -1.00E+00 -   i     i     i           i         I   i       i i             i C:
42 C)
Measurement Locations I 0 ActIvftv -     Averale" - "+3StDev"-- "-3StDev'I 00 C)
 
0 F8000102 Frequency Plot Cs1 37 DCGL = 51.2 pCi/g 10 9
c.*  Ca-)
8 7
      'I)
LL2    6-C 0
5 4
a)   3 0
0 N                 N I-TI Bins - Upper End Value (pCi/g) 00}}

Latest revision as of 07:49, 14 November 2019

Final Status Survey Report for March 20, 2008, Industrial Area Central Yard - North and West of the Maintenance Building, Survey Unit F8000102
ML090830313
Person / Time
Site: Rancho Seco
Issue date: 03/20/2008
From:
Sacramento Municipal Utility District (SMUD)
To:
NRC/FSME
Shared Package
ML090830613 List: ... further results
References
DPG 09-097, F8000102
Download: ML090830313 (18)
v • d • e


Text

Rancho Seco Final Status Survey Summary Report March 20, 2008 Industrial Area Central Yard - North and West of the Maintenance Building Survey Unit F8000102 Prepared ByQ * *.* Date:.__________

Reviewed Date: * *L 4__ i Date: "_- - - "

Approved Radiological

(

FINAL STATUS SURVEY

SUMMARY

REPORT Survey Unit:

F8000102, Industrial Area Central Yard - North and West of the Maintenance Building Survey Unit

Description:

Operating History: This area covers the majority of Industrial Area soils exclusive of the building footprints and rail line in this area. Operating records and the HSA document no specific release of radioactivity' in these survey areas however this area does border known contaminated areas. The HSA recorded no specific unplanned release events.

Site Characterization: Soil and sediment samples were collected and analyzed for the presence of plant-derived radionuclides. Cs-137 was the only detected nuclide of plant origin with a mean activity level of 0.062 pCi/g and a maximum value of 0.299 pCi/g.

(Site background levels of Cs-137 have been determined to be approximately 0.312 pCi/g.) As described in section 2 of the LTP, the area was evaluated using DSIP-0020 and was designated as Class 3.

Survey Unit Design Information:

The Survey Unit Design Parameters'are presented in Table 1 below. The survey unit and measurement locations are depicted on the maps in Attachment 1. Direct measurement locations were randomly determined and 414 m2 were scanned for approximately 23%

coverage. Soil samples were collected at each direct measurement location and analyzed by HPGe detector. The instrumentation used for the survey along with the MDC values are listed in Tables 2-1 and 2-2 in Attachment 2.

Page 2 of 7 FSS Summary Report 'F8000102

Table 1. Survey Unit Design Parameters Survey Design Parameter Value I Comment Survey Area: F800 Industrial Area Central Yard - North and West of the Maintenance Building Survey Unit: 0102 Open Land Area Class: 3 LTP Table 5-4 SU Area (m2): 1800 Evaluator: Gary Frank DCGL Cs137 surrogate (pCi/g): 51.2 Area Factor: N/A Class 3 Design DCGLemc (pCi/g): N/A Class 3 LBGR (pCi/g): 25.6 Default = 50% DCGL Design Sigma (pCi/g): 0.01 DTBD-06-001, Table 5-4D Type I Error: 0.05 Type II Error: 0.05 Nuclide: Cs137 Sample Area (m2): N/A Class 3 Total Area Scanned (m2): 414 Scan Coverage (%): 23% Class 3 Zl-a, : 1.645 1.645 Sign P: 0.99865 Calculated Relative Shift: 2560 Relative Shift Used: 3 Uses 3.0 if Rel Shift >3 N-Value: 11 Design N-Value + 20%: 14 NUREG-1575 Table 5-5 Grid Spacing L: N/A Class 3

-Page 3 of 7 FSS Summary Report F8000102

Survey Results:

A total of 14 direct measurements were made in F8000102. The results including mean, median, standard deviation and range are shown in Table 2. All of the direct measurements were less than the DCGL. None of the scan measurements indicated areas of elevated activity above MDA with Cs-137 having a MDA from 0.245 to 0.313 pCi/g and Co-60 having an MDA from 0.156 to 0.237 pCi/g. Soil samples were counted to the MDC shown in Table 2-1 of Attachment 2.

Table 2. Direct Measurement Results (all activity values in pCi/g)

Measurement ID Cs137 MDA Cs137 Activity Uncertainty Mean: * 5.45E-01 Median: I *. 7.86E-01 Standard Deviation: ,:

  • 3.82E-01 Range: 4.81E-02 to 9.15E-01 F8000102A0001GD 8.29E-01 < 8.29E-01 F8000102SOO01SS 5.09E-02 < 5.09E-02 F8000102A0002GD 9.15E-01 < 9.15E-01 F8000102S0002SS 6.04E-02 < 6.04E-02 F8000102A0003GD 7.89E-01 < 7.89E-01 F8000102S0003SS 4.8 1E-02 < 4.8 1E-02 F8000102A0004GD 7.82E-0 1 < 7.82E-0 1 F8000102S0004SS 5.35E-02 < 5.35E-02 F8000102A0005GD 7.59E-01 < 7.59E-01 F8000102S0005SS 5.13E-02 < 5.13E-02 F8000102A0006GD 7.99E-01 < 7.99E-01 F8000102A0007GD 8.34E-01 < 8.34E-01 FS000102A0008GD 8.02E-01 < 8.02E-01 F8000102A0009GD 8.50E-01 < 8.50E-01 Page 4 of 7 FSS Summary Report F8000102

Survey Unit Data Assessment:

The survey design required 14 direct measurements for the Sign Test. The critical value and the results of the Sign Test are presented in Table 3. The sample mean and median values were less than the DCGL. The sample standard deviation was greater than the design standard deviation, but both values of sigma resulted in a relative shift greater than three (3), no additional samples were required.

Page 5 of 7 FSS Summary Report F8000102

Table 3. Data Assessment Results Survey Results Parameter Value Comment Actual Direct Measurements (N): 14 Median (pCi/g): 7.86E-01 Mean (pCi/g): 5.45E-01 Standard Deviation (pCi/g): 3.82E-01 Maximum (pci/g): 9.15E-01 Sign Test Final N Value: 14 S+ Value: 14 Critical Value: 9 Sufficient Samples Collected: Yes Maximum Value < DCGL: Yes Median Value < DCGL: Yes Mean Value < DCGL: Yes Maximum Value < DCGLemc: N/A Class 3 Standard Deviation <= Sigma: Investigate <0.5 DCGL Pass the Sign Test? Yes Reject the Null Hypothesis? Yes The survey unit passes all conditions? Investigate <0.5 DCGL - Survey Passes Page 6 of 7 FSS Summary Report F8000102

Survey Unit Investigations and Results:

No investigations were required for either direct or scan measurements and no investigation results are reported.

ALARA Statement:

As stated in Chapter 4 of the LTP, as long as the residual activity within the survey unit is less than the DCGL, the ALARA criterion has been met.

Changes in Initial Survey Unit Assumptions:

The survey unit was designed as a Class 3 land survey and the sample results are consistent with that classification. The variability of the survey results was greater than the characterization data used for survey design. No potential areas of elevated activity were detected.

==

Conclusion:==

The FSS of this survey unit was properly designed as a Class 3 survey based on Table 5-4 of the LTP. The required number of direct measurements was made and the scan coverage met the requirement of Table 5-6 of the LTP. All of the direct measurements were less than the DCGL. No investigations were required.

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.

It is concluded that survey unit F8000102 meets the release criteria of 10CFR20.1402.

Page 7 of 7 FSS Summary Report F8000102

Attachment 1 Maps March 20, 2008 Survey Unit F8000102

F8000102-Page 2 of 4 Att. 1 Maps F8000102

F8000102- M2 Page 3 of 4 Att. 1 Maps F8000102

F8000102 - M2A Page 4 of 4 Att. 1 Maps F8000102

Attachment 2 -

Instrumentation March 20, 2008 Survey Unit F8000102

Table 2-1. Survey Unit Instrumentation Detector Detector Serial Instrument Model No. MDC No.

HPGe N/A 05069128 Soil - 0.0604 pCi/g Cs-137 Inspector N/A 08051294 Asphalt - 0.915 pCi/g Cs- 137 Soil - 0.272 pCi/g Cs-137 ISOCS N/A 2983947 Soil - 0.178 pCi/g Co-60 Asphalt - 0.313 pCi/g Cs- 137 Table 2-2. Investigation Criteria and DCGL Instrument Parameter Value Soil - 26.3 pCi/g Cs-137 ISOCS Investigation Criteria - Scan Soil - 6.3 pCi/g Co-60 Asphalt - 26.3 pCi/g Cs- 137 Inspctor Inspector Direct Investigation Level - Asphalt - 26.3 pCi/g Cs-137 HPGe Investigation Level Soil - 26.3 pCi/g Cs-137 Soil - 6.3 pCi/g Co-60 All DCGLw 51.2 Cs-137 12.6 Co-60 All DCGLEMC N/A Page 2 of 2 Att. 2 Instrumentation F8000102

Attachment 3 Investigation March 20, 2008 Survey Unit F8000102 (none required)

Attachment 4 Data Assessment

  • March 20, 2008 Survey Unit F8000102

F8000102 Quantile Plot Cs137 DCGL = 51.2 pCi/g 1.000 0.900 0.800 0.786 0.700 U)

U 0.600 0.500

.5 U 0.400 CD) 0.300 0.200 0.100 0.000 Ci) 0 20 40 60 80 100 Percentile

, Activity - Median - - - 75th Percentile .... 50th Percentile 00j

CD F8000102 Scatter Plot Cs137 DCGL = 512 pClIg 2.00E+00

. .69 CD 1.50E+00 1.OOE+00 U0 0 0 0 0 CL 5.500 E-01 . . . . . . . . . . . . . . . .5 45

" 0.OOE+00 0 0o

-5.00E-01 0.602

-1.00E+00 - i i i i I i i i i C:

42 C)

Measurement Locations I 0 ActIvftv - Averale" - "+3StDev"-- "-3StDev'I 00 C)

0 F8000102 Frequency Plot Cs1 37 DCGL = 51.2 pCi/g 10 9

c.* Ca-)

8 7

'I)

LL2 6-C 0

5 4

a) 3 0

0 N N I-TI Bins - Upper End Value (pCi/g) 00

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