ML070030548

Yankee Nuclear, Final Status Survey Report, Appendix a - YNPS-FSSP-OOL-05, Final Status Survey Planning Worksheets

ML070030548
Person / Time
Site:	Yankee Rowe
Issue date:	11/08/2004
From:	Bisson J, Hummer J, Danni Smith Yankee Atomic Electric Co
To:	NRC/FSME
References
YNPS-FSS-OOL05-00, YNPS-FSSP-00L-05-01-00
Download: ML070030548 (76)

Text

Final Status Survey Planning Worksheet Page 1 of 5 GENERAL SECTION--

Survey Area #: 00L-05 Survey Unit #: 0 1 FSSP Number: YNPS-FSSP-00L-05-0 1-00 (CHAR)

PREPARATION FOR FSS ACTIVITIES -- A Check marks in the boxes below signify affirmative responses and completion of the action.

1.1 Files have been established for survey unit FSS records. El 1.2 ALARA review has been completed for the survey unit. d 1.3 The survey unit has been turned over for final status survey. E l

1.4 An initial DP-8854 walkdown has been performed and a copy of the completed Survey Unit Walkdown Evaluation is in the survey area file. El 1.5 Activities conducted within area since turnover for FSS have been reviewed.

Based on reviewed information, subsequent walkdown: not warranted warranted If warranted, subsequent walkdown has been performed and documented per DP-8854.

OR The basis has been provided to and accepted by the FSS Project Manager for not performing a subsequent walkdown.

1.6 A final classification has been performed.

Classification: CLASS 1 CLASS 2 CLASS 3 I l l DATA QUALITY OBJECTIVES (DQO) 1.0 Statement of problem:

Survey Area 00L-05 is an open land area with insufficient characterization data to begin a proper Final Status Survey. This will be a characterization survey, planned and performed with enough rigor that it could serve as the final status survey, depending upon the results.

Survey Unit 01 is the section of 00L-05, about 10,400 m2 in size, representing approximately the southern half of Survey Area 00L-05. It is primarily a heavily wooded, open land area, which has not been disturbed since plant construction, with the exception of an abandoned rail road bed and part of the access road. The problem at hand is to demonstrate that the years of plant operation did not result in an accumulation of plant-related radioactivity that exceeds the release criteria.

The planning team for this effort consists of the FSS Project Manager, FSS Radiological Engineer, FSS Field Supervisor, and FSS Technicians. The FSS Radiological Engineer will make primary decisions with the concurrence of the FSS Project Manager.

2.0 Identify the decision:

Does residual plant-related radioactivity, if present in the survey unit, exceed the release criteria?

Alternative actions that may be implemented in this effort are investigation, reclassification or resurvey, using these data as characterization data.

DPF-8856.1 Rev. Original Page 1 of 6

3.0 Identifv the inuuts to the decision:

Sample media: soil Types of measurements: soil samples and judgmental scans Applicable DCGLs: 3 .OO pCi Cs 137 per g (I 0-rnrern/y DCGL)

The characterization data in the HSA is insufficient to support FSS planning. None of the thirteen soil samples that were collected in Survey Area 00L-005 were actually from Survey Unit 01. No analysis for Hard-to-Detect (HTD) nuclides was done in this survey area.

Average Cs-137: Based upon the history of the area, it is expected that this nuclide will be at background concentrations. Pelham Lake data, decayed to October 2004 give an average value of 0.808 pCi/g for Cs- 137. This data may be updated when data is available from the reference area sampled in October 2004.

H~tandarddeviation: (o): o(Cs-137) = 0.339 pciig.

Surrogate DCGL: No surrogate DCGL will be used because the HTD nuclides were generally not produced by the plant in greater quantities (relative to their DCGLs) than the gamma emitters were.

Even though Sr-90 may be detectable in the samples, it is less likely to have been produced by the plant than several of the gamma-emitters. Two samples will be analyzed for HTD nuclides.

Investigation Level for soil samples: To be determined, based upon background reference area data. In general, the investigation level will be at 50% of the DCGL plus any background that has been established (Cs- 137 or Sr-90).

Il~nvesti~ation Level for scan: >background using an audible signal.

Expected background range for SPA-3 scan: 8,000 cpm to 15,000 cpm, depending on the presence of rock and boulders in the immediate vicinity of the measurement location.

Radionuclides for analysis: All LTP nuclides with the focus on Cs-137.

1MDCSfor gamma analysis of soil samples:

Nuclide 10 - 50% DCGL (vCi/d Co-60 0.14-0.70 Nb-94 0.25-1.3 Ag- 108m 0.25-1.3 Sb-125 1.1-5.5 CS-134 0.17-0.86 CS-137 0.30-1.5 Eu-152 0.35-1.7 Eu-154 0.33-1.7 Eu-155 14-70 I l ~ h edesired MDCs in the laboratory analyses of FSS soil samples will be the 10% DCGL values. If it is DPF-8856.1 Rev. Original Page 2 of 6

MDCs for HTD nuclides: In addition to the MDC values listed above, the following MDC values will also be transmitted to the outside laboratory via the chain-of-custody form accompanying the FSS soil samples:

Nuclide -

10 50% DCGL (pCi/g)

C-14 0.19-0.96 Fe-55 1000-5200 Ni-63 28-140 Sr-90 0.059-0.29 Tc-99 0.48-2.4 Pu-23 8 1.1-5.7 Pu-239 1.O-5.2 Pu-241 34- 170 Am-241 1.O-5.2 Cm-243 1.1-5.5 Scan coverage: SPA-3 scans will be performed over an approximate lm by l m area surrounding each soil sample, as permitted by terrain and treelbrush density. Two biased scans will also be performed:

one along the path of the old railway line which runs close to the south-east boundary of the unit; and the other near and parallel to the brook that is just north of the northern boundary of Unit 1. Each of these scans will cover an area approximately 10 m2 in size (1 m in width and 10 m in length). These locations were selected because they are the closest points in Survey Unit-01 to on-going plant decommissioning activities or activities that may have involved licensed material during plant operations.

1 MDCR for SPA-3:The accompanying Table 1 provides MDCR by various general area background levels.

I MDC@CGL) for SPA-3scans: The accompanying Table 1 provides MDC(fDCGL) by various general area background levels.

QC check and measurements: QC checks for the SPA-3 will be performed in accordance with DP-8540. Two QC split samples will be collected which is more than the 5% required by the LTP. This is being done in this early round survey in order to amass data on the HTD nuclides. The individual sample location numbers for split sampling have been chosen at random from the 17 random samples.

In addition, two samples will be counted twice in house and the results compared.

114.0 Define the boundaries of the survey:

Boundaries of Survey Unit 01 are as shown on the attached map. There are no structures present in the Survey Unit 01, with the exception of a large sign near the river which has partially fallen down. This sign had nothing to do with plant operations. There is an area within the unit where it appears that concrete was dumped and allowed to harden. This was apparently done during construction, so it is safe

'to assume that the soil under the concrete is not impacted by plant operations. Any of the sample locations that happen to fall on this concrete slag will be dealt with according to General Instructions,

1. 6. The survey will be performed under normal (fall) weather conditions and in daylight hours (allowing adequate daylight time for ingress and egress).

1 5.0 Develop a decision rule:

I (a) If all the sample data show that the soil concentrations of all plant-related nuclides are below the DCGL, reject the null hypothesis (i.e., Survey Unit 01 meets the release criteria).

(b) If the action levels are exceeded, then perform an investigation survey. This may include the use of a statistical test.

(c) If the average concentration of any individual nuclide exceeds the DCGL or if the sum of DPF-8856.1 YNPS-FSSP-00L05-01-00 Rev. Original Page 3 of 6

fractions exceeds one, then accept the null hypothesis (i.e., S w e y Unit 01 fails to meet the release criteria).

6.0 Specify tolerable limits on decision errors:

Null hypothesis: Residual plant-related radioactivity in Survey Unit 01 exceeds the release criteria.

Probability oftype I error: 0.05 Probability of type II error: 0.05 LBGR: (3.00 pCi/g)/2 = 1.5OpCi/g I

17.0 Optimize Design:

Type of statistical test: WRS Test PI Sign Test u Cs-137 is present in background due to fallout - Cs-137 in reference area (decay-corrected to October 2004): 0.81 pCi/g.

Basis including background reference location (if WRS test is specified): YA-REPT-00-006-03 Number of samples : 17 random samples plus five biased samples.

Note: 17 FSS soil samples will be collected in randomly selected locations, accounting for locations that cannot be sampled. This number has been chosen, based upon experience, with the expectation that the data will be useable for the FSS survey. No characterization data were available. In addition to the random samples, five biased samples will be taken.

Biased samples: Biased sample locations will be selected before, or at the time of sample collection and their locations will be added to the map, with the last letter "B". The addition of these samples and the relocation of any samples may be added to the map without requiring a revision. The coordinates of the biased sample locations will be determined and added to the record. The locations will be chosen, after the random locations, to include one or more soil samples in locations where runoff from the concrete slag may have concentrated any activity that may have fallen on the slag. In such a location, it would be no surprise if fallout nuclides, i.e., Cs-137 and Sr-90 were found in above average concentrations. Other biased sample locations will be selected to increase the sample density in areas that that would have been most readily accessible, and therefore, most easily impacted during plant operations.

GENERAL INSTRUCTIONS J

1. Collect 17 random 1-liter FSS soil samples and 5 biased 1-liter soil samples in accordance with DP-8120, using sampling equipment as stated in DP-8120. Two of the 17 FSS soil samples will be QC split samples.

1. 2. Soil sample designation: I 1(a) FSS soil samples: 00L-05-0 1-001-F through 00L-05-01-0 17-F. I 1 (b) Biased FSS soil sample: 00L-05-0 1-018-F-B through 00L-05-01-022-F-B. 1I (c) 2 QC split samples: 00L-05-01-001-F-S and 00L-05-01-015-F-S. These two will be analyzed for hard-to-detect nuclides, in addition to being analyzed by gamma spectroscopy. The results of the off-site gamma spec will be compared with the on-site results in accordance with DP-8864.

(d) 2 recount samples: 00L-05-01-007-F and 00L-05-011-F will be counted twice on site. The results will be compared in accordance with DP-8864.

1 3. All soil samples will be received and prepared in accordance with DP-88 13. 1I U4. Chain of Custody form will be used in accordance with DP-8123 for the two split samples since they 1 DPF-8856.1 Rev. Original Page 4 of 6

will be sent to an off-site laboratory.

5. The measurement locations will be identified using GPS. In cases where the location cannot be I

determined directly using GPS, an offset will be used to describe the distance and bearing from a known GPS location. Each location will be marked with a flag, either prior to or at the time of the sampling.

The FSS Radiological Engineer or FSS Field Supervisor will guide the FSS Technicians to the sample locations.

6. Any locations that are not suitable for soil sampling, for example, because of the presence of a rock or concrete slag, will be relocated to the nearest suitable location and documented in the log. In cases where concrete slag is the obstacle, at least one sample should be collected consisting of decayed and composted organic matter from a nearby pocket, if such a sample can be obtained with sufficient volume, even though it may not contain any mineral soil. This will be considered a "soil" sample for analysis purposes. Such a sample should be described in the sample log. The actual sample location will be marked. The coordinates of the actual sample location will be determined using GPS, or the sample location will be otherwise documented.

7. Survey instrument: Operation of the E-600 w/SPA-3 will be in accordance with DP-8535, with QC checks performed in accordance with DP-8540. The instrument response checks shall be performed before issue and after use.

Y 8. The job hazards associated with the FSS in Survey Unit 01 are addressed in the accompanying JHA for 00L-05-0 1.

9. All personnel participating in this survey shall be trained in accordance with DP-8868.

SPECIFIC INSTRUCTIONS

1. FSS Technicians will perform scans by moving the SPA-3 detector at a speed a . 5 mfs, keeping the probe less than 3 inches from the surface, and following a serpentine pattern that includes at least 3 passes across each square meter. When scanning and wallang, a slow pace (i.e., 1 step per second) shall be used. Scanning will be performed in the rate-meter mode with the audible feature on. Surveyors will listen for upscale readings, to which they will respond by slowing down or stopping the probe to distinguish between random fluctuations in the background and greater than background readings.

Location(s) where detectable-above-background scan readings are found will be investigated.

A first level investigation may be done with the SPA-3E-600 to determine if the observed increase in the scan measurement is due to the presence of rocks and boulders. SPA-3 scans performed in non-impacted areas have shown that rock formations accounted for increased count rates. If it can be demonstrated that the presence of rocks and boulders is the cause of an increased count rate during a SPA-3 scan, record that finding on form DPF-8856.2. If it is demonstrated that the rocks and boulders do not account for an above background S P A 3 measurement, a soil sample will be collected at the point of the highest S P A 3 reading in the scanned area. Detailed descriptions of investigation actions will be recorded on form DPF-8856.2 the location of the above background scan and sample will be recorded on the survey map. The location description must include sufficient detail to revisit the spot at a later time. If a soil sample is collected during the first level investigation, the sample designation will consist of the measurement location code plus the letter "I" (for investigation). For example, if a soil sample is collected during a first level investigation at measurement location 001, it will be designated 00L-05-01-00 1-F-I. If the investigation calls for more than one sample, sequentially number the investigation samples as "Il", "I2", etc.

1 2. Gamma analysis will be performed on all soil samples.

3. All sample analysis will achieve the MDC values stated in the DQO section of this plan.

DPF-8856.1 Rev. Original Page 5 o f 6

NOTIFICATION POINTS I I QA notification point(s) (y/n) y Specify: 1. Datehime of initial pre-survev briefing

2. Dateltime of commencement of soil sampling; 3. Dateltime of first soil scan measurement; 4.

Dateltime of the two biased soil scan measurements. NUTJF, FD

/

/w II FSI point(s) (yln) n Specify:

I+ U Prepared by . -41 Date 1 \ /B//O4 FSS Radiological Engineer Date b//#/uf Approved by Date PLY FSS Project Manager DPF-8856.1 Rev. Original Page 6 o f 6

Table 1 SPA3 Scan Inputs:

Scan speed: 0.5 mls MDCR = 1.38*sqrt(b)/sqrt(p)'t Where:

b= background counts in time t p= surveyor efficier 0.5 t= time the detector is above localized activity = 1.12 s = 0.0187 min Assume:

Localized contam diam = 56 cm AF= Area Factor Ei = Scanning instrument efficiency (YA-REPT-00-015-04) f = radionuclide fraction Cs-137 Co-60 Ei = 188 379 cpmlpcilg DCGL 3 1.4 f = 1 0 AF = 1 1

Table 1 (p 2 2)

SPA3 Scan Inputs:

Scan speed: 0.25 mls MDCR = I.38"sqrt(b)lsqrt(p)*t Where:

b = background counts in time t p = surveyor efficier 0.5 t = time the detector is above localized activity = 2.24 s = 0.0373 min Assume:

Localized contam diam = 56 cm AF= Area Factor Ei = Scanning instrument efficiency (YA-REPT-00-015-04) f = radionuclide fraction CS-137 CO-60 Ei = 188 379 cpm/pCi/g DCGL 3 I.4 f = I 0 AF = 1 1

Final Status Survey Planning Worksheet Page 1 of 4 1.1 Files have been established for survey unit FSS records. IZl 1.2 ALARA review has been completed for the survey unit. IZl (YA-REPT-00-003-05) 1.3 The survey unit has been turned over for final status survey. V the survey area file.

1.5 Activities conducted within area since turnover for FSS have b en reviewed. B/

Based on reviewed information, subsequent walkdown: 2 not warranted If warranted, subsequent walkdown has been performed and documented per DP-8854.

warranted OR The basis has been provided to and accepted by the FSS Project Manager for not performing a subsequent walkdown. I d 1.6 A final classification has been performed. E f Classification: CLASS 1 CLASS 2 El CLASS 3 DATA QUALITY OBJECTIVES (DQO) 1.0 Statement of uroblem:

The real estate associated with survey unit 00L-05-03 is owned by Trans-Canada. This parcel generally extends from the northern boundary of survey unit 00L-05-08 northward to the shoreline of the Deerfield River. The surface area of 00L 03 is 9772.9 m2. Approximately half of the southern portion of the survey unit is an open field, while the northern half is a significantly wooded region along the river. A road to the hydroelectric station traverses survey unit 00L-05-03.

Characterization soil samples indicate that the concentrations of plant-related radioactivity in soil are well below DCGLs.

However, since the survey unit may have been subject to low-level contamination resulting from minor inadvertent run-off from decommissioning activities conducted in nearby Class 1 units, survey unit 00L-05-03 has been assigned a Class 2 status.

The data collected under this plan will be used to determine whether or not residual plant-related radioactivity in soil of Survey Unit 00L05-03 meet LTP release criteria.

The planning team for this effort consists of the FSS Project Manager, FSS Radiological Engineer, FSS Field Supervisor, and FSS Technicians. The FSS Rad. Engineer will make primary decisions with the concurrence of the FSS Project Manager.

2.0 Identifv the decision:

Does residual plant-related radioactivity, if present in the survey unit, exceed LTP release criteria? Alternative actions that may be implemented in this effort are investigations and remediation followed by re-surveying.

3.0 p  :

Sample media: soil Types of measurements: soil samples and SPA-3 scans.

Radionuclide-of-concern: Cs- 137 DPF-8856.1 Page I of 4

Characterization data contained in the Yankee HSA were used in the FSS planning for unit 00L-05-03. Cesium-137 was the most frequently identified easy-to-detect plant-related radionuclide in the surface soil samples collected within the unit in mid to late 1990s. The decay-adjusted average Cs-137 concentration, 0.03 pCi/g, is well below the DCGL value for Cs-137 (3.0 PCU~).

a. Soil Sam~les:

For planning purposes, only Cs-137 was selected as the radionuclide-of-concern for the unit. However, the presence of all LTP-listed radionuclides (gamma-emitters, HTD beta-emitters, and TRUs) in the soil will be evaluated under this survey plan.

The YNPS Chemistry Dept. will analyze each soil sample for all LTP-listed gamma-emitting nuclides (excluding Am-241 and Cm-243). Two soil samples will be sent to an independent laboratory for analyses of gamma-emitters and HTD radionuclides (these analyses will include Am-24 1 and Cm-243).

Average concentration: Cs-137 = 0.03 pCilg Standard deviation (a): Cs- 137 = 0.09 pCilg Applicable DCGL: The DCGLs applied under this survey plan correspond to annual doses of 8.73 mremly (the 10-mremly DCGL adjusted for the dose contributions from sub-surface concrete structures and tritium in ground water). 'These DCGLs are presented in Table 1.

TABLE 1 Nuclide DCGL (pCi/g) Nuclide DCGL (pCi/g) Nuclide DCGL (pCi/g)

Co-60 1 1.4E+O I Eu-152 1 3.6E+O I 9-90 ( 6.OE-1 I Investigation Levelfor soil samples: Investigation levels for soil samples are 1) >DCGLw for any LTP-listed nuclide, or 2) a sum of DCGLw fractions >1 .O.

MDCs jbr gamma analysis ofsoil samples are listed in Table 2.

TABLE 2 Target MDC Target MDC Target MDC Nuclide ( P C ~ Nuclide ( P C ~ Nuclide (PCilg)

Co-60 1.4E-1 I Sb125 l.lE+O Eu-1 52 3.5E-1 Nb-94 2.5E-1 I Cs-134 1.7E-1 Eu-1 54 3.3E-1 AglO8m 2.5E-1 I Cs-137 3.OE-l Eu-155 1.4E+1 Note: If a target MDC value cannot be achieved in analysis, then a value no greater than 5X the listed value must be achieved in the analysis.

MDCsjbr analyses ofHTD nuclides are presented in Table 3.

TABLE 3 Target MDC Target MDC Target MDC Nuclide ( P C ~ Nuclide ( P C ~ Nuclide (PCilg)

H-3 1.3E+1 Sr-90 5.9E-2 Pu-24 1 3.4E+ 1 C-14 1.9E-1 Tc-99 4.8E-1 Am-241 1.OE+O Fe-55 1.OE+3 Pu-238 l.lE+O Cm-243/244 1.1E+O Ni-63 2.8E+1 Pu-2391240 1.OE+O Note: If a target MDC value cannot be achieved in analysis, then a value no greater than 5X the listed value must be achieved in the analysis.

U DPF-8856.1 YNPS-FSSP-00L05-03-00 U

Page 2 of 4

b. Scan Coverape:

A minimum of 10% of the surface area (i.e. 2977 m2) within 00L-05-03 will be scan surveyed using a S P A 3 detector.

Scan surveys will be biased to include: 1) areas adjacent to where the septic leach field had been excavated; 2) the boundary shared with survey unit 00L-05-08; 3) along the drainage ditch associated with the access roadway to the hydro-electric generating station; and 4) as directed by either the cognizant FFS Radiological Engineer or Field Supervisor. Boundaries of areas where scan surveys are performed should be marked such that the area can be plotted on a map and the surface area can be calculated via GPS technology (or similar). Increase coverage as necessary to ensure that at least 977 m1 has been scan surveyed.

Investigation Levelfor SPA -3 scan: >background indication using an audible signal with headphones MDCR for SPA-3: Attachment 1 provides MDCR values by various background levels.

MDCfor SPA-3 scans: Attachment 1 also provides MDC values by various background levels.

c. Q C checks and measurements:

QC checks for the SPA-3 will be performed in accordance with DP-8504.

QC checks for the GPS system will be performed in accordance with DP-8859.

Two QC split samples will be collected, and QC recounts for 2 soil samples will be performed by the YNPS Chemistry Lab.

4.0 Define the boundaries of the survey:

Boundaries of 00L05-03 are as shown on the attached map. The survey will be performed under appropriate weather conditions (as defined by instrumentation limitations and human tolerance). Surveys may be performed on any shift of work.

5.0 Decision Rules:

Upon review of the FSS data collected under this survey plan, determine the status of the survey unit and take actions as appropriate:

(a) If all the sample data show that the soil concentrations of LTP-listed nuclides are below the DCGL, and the sum of fractions of LTP-listed nuclides are below unity, then reject the null hypothesis (i.e., Survey Unit 00L-05-03 meets the release criteria).

(b) If the investigation levels are exceeded, then perform an investigation survey.

(c) If the average concentration of any LTP-listed nuclide exceeds its respective DCGL, or the average sum of fractions of LTP-listed nuclides exceeds unity, then accept the null hypothesis (i.e., Survey Unit 00L-05-03 fails to meet the release criteria).

(d) Alternate actions include investigations, reclassification, remediation and resurvey.

6.0 Specifv tolerable limits on decision errors:

Null hypothesis: Residual plant-related radioactivity in Survey Unit 00L05-03 exceeds the release criteria.

Probability of type I error: 0.05 Probability of type 11error: 0.05 LBGR: 1.5 7.0 Outimize Design:

Type of statistical test: WRS Test Sign Test Basis including background reference location (if WRS test is specified): NIA Number samples (per DP-8853): 18 (1 5 "required", plus 3 samples for added statistical power)

Biased samples: None DPF-8856.1 Page 3 of 4

GENERAL INSTRUCTIONS

1. Where possible, measurement locations will be identified using GPS in accordance with DP-8859. Each location will be marked to assist in identifying the location. Any locations that are not suitable for soil sampling will be relocated to the nearest suitable location and documented in the field log in accordance with DP-8856.

2. Standing water must be removed prior to the collection of any FSS measurement in that area.

3. Soil samples shall be collected in accordance with DP-8120.

4. Chain of Custody forms shall be used in accordance with DP-8123 for all soil samples sent to an off-site laboratory.

5. All soil samples shall be received and prepared in accordance with DP-8813. Note: Split samples to be sent to an off-site lab will not be dried prior to counting on site or shipping.

6. Survey instrument: Operation of the E-600 w/SPA-3 will be in accordance with DP-8535 with QC checks performed in accordance with DP-8504. The instrument response checks shall be performed before issue and after use.

7. All S P A 3 scans will be performed with the audible feature activated. FSS Technicians will listen for upscale readings to which they will respond by slowing down or stopping the probe to distinguish between random fluctuations in the background and greater than background readings.

8. The job hazards associated with the survey described in this package are addressed in the accompanying Job Hazard Assessment (JHA) for 00L-05-03.

All personnel participating in this survey shall be trained in accordance with DP-8868.

SPECIFIC INSTRUCTIONS

1. All designated measurement locations will be identified by GPS per DP-8859 or by use of reference points and tape measure as necessary. If a designated sample location is obstructed for any reason, the FSS Radiological Engineer or the FSS Field Supervisor will select an alternate location in accordance with DP-8856. A detailed description of the alternate location will be recorded on form DPF-8856.2, the survey unit map will be annotated appropriately, and the alternate location will be conspicuously marked to facilitate re-visiting to identify and record the coordinates with GPS in accordance with DP-8859 or by measurement from a known reference point when GPS is not available.

2. Sample Requirements:

Collect 18 (1-liter) soil samples in accordance with DP-8120. Two of the 18 soil samples will be analyzed as QC split samples to fulfill the QC requirement of DP-8852. The same QC split samples will also be analyzed for Hard-to-Detect nuclides in accordance with section 5.6.3.2.1 of the LTP and DP-8856.

3. Soil Sample Designations:

FSS soil samples: 00L-05-03-00 1-F through 00L-05-03-0 18-F corresponding to FSS sample locations 00 1 through 0 18 on the survey map.

QC split samples: 00L-05-03-009-F-S and 00L-05-03-018-F-S are to be designated as QC split samples. Do not dry these samples because they are to be shipped off-site for firther analysis.

Recount samples: 00L-05-03-003-F-RC and 00L-05-03-005-F-RC are to be counted twice on site. The results will be compared in accordance with DP-8864.

4. Sample Analysis:

Gamma analysis will be performed on all soil samples. If any of the gamma analyses show that an investigation level has been exceeded an investigation survey will be conducted under a revision to this survey plan.

YNPS Chemistry will analyze 00L-05-03-003-F and 00L-05-03-005-F as sample recounts. The recounted samples will be identified as 00L-05-03-003-F-RC and 00L-05-03-005-F-RC, respectively.

On-site gamma analysis of the FSS samples shall achieve the MDC values stated in the DQO section of this plan.

The off-site laboratory will analyze 00L-05-03-009-F-S and 00L-05-03-018-F-S for all LTP nuclides. The MDCs will be communicated to the laboratory using an attachment to the Chain-of- Custody form.Each sample will be prepared in accordance with DP-8813, "Sample Receipt and Preparation." These samples are not to be dried prior to shipment. Ensure that the lid of the container is secured and sealed with electrical tape to prevent loss of moisture during shipping.

DPF-8856.1 Page 4 o f 4

5. Scan Surveys:

SPA3 scan surveys are to be executed using a probe speed of no greater than 0.25mls (approximately 10 inchesls).

The location of scan surveys will be biased to include: 1) areas adjacent to where the septic leach field had been excavated; 2) the boundary shared with survey unit 00L-05-08; 3) along the drainage ditch associated with the access roadway to the hydro-electric generating station; 4) low lying areas where run-off water has potentially collected; and 5) as directed by either the cognizant FFS Radiological Engineer or Field Supervisor.

Boundaries of areas where scan surveys are performed should be marked such that the area can be plotted on a map and the surface area can be calculated via GPS technology (or similar). Increase coverage as necessary to ensure that at least 977 ma has been scan surveyed. Documentation should include the location of any non-perimeter SPA-3 scan and an estimate of the scanned area.

Scan speeds will be observed by the FSS Field Supervisor and documented on DPF-8856.2.

In the event that elevated instrument responses (above background) are observed, initial investigations should be conducted to determine if the increase is due to the presence of localized natural activity in rocks. SPA3 scan surveys performed in non-impacted areas have shown that rock formations generally account for increased count rates. If it can be demonstrated that the presence of rocks is the cause of an increased count rate, record that finding on form DPF-8856.2. If it is demonstrated that the rocks do not account for elevated instrument responses, a soil sample will be collected at the point of the highest response in the area being surveyed. Document detailed descriptions of investigation actions on form DPF-8856.2. The location of the elevated instrument response and associated sample shall be recorded on a map of the survey unit, including sufficient information to relocate the sample point. If a soil sample is collected during the first level investigation, the sample designation will continue the soil sample numbering sequence plus the letter "I" (for investigation).

Prepared by Date Reviewed b Date

&0.

4 Approved by Project ~ a n ' g e r DPF-8856.1 Page 5 of 4

YNPS-FSSP-OOL-05-03-0 Attachment 1 SPA-3 Scan Tables Max Backaround Scan Speed 1 lnlSec I mISec I BKG (corn) 1

h 1 ill I r .I, Final Status Survey Planning Worksheet GENERAL SECTION Survey Area #: 00L-05 I Survey Unit #: 04 Survey Unit Name: Unnamed Tributary Along Main Access Road FSSP Number: YNPS-FSSP-00L-05-04-03 PREPARATION FOR FSS ACTIVITIES Check marks in the boxes below signify affirmative responses and completion of the action.

1.1 Files have been established for survey unit FSS records.

1.2 ALARA review has been completed for the survey unit. El Refer to YA-REPT-003-05 1.3 The survey unit has been turned over for final status survey. El 1.4 An initial DP-8854 walkdown has been performed and a copy of the completed Survey Unit Walkdown Evaluation is in the survey area file. El 1.5 Activities conducted within area since turnover for FSS have been reviewed. Fl Based on reviewed information, subsequent walkdown: Fl not warranted warranted If warranted, subsequent walkdown has been performed and documented per DP-8854.

OR The basis has been provided to and accepted by the FSS Project Manager for not performing a subsequent walkdown.

1.6 A final classification has been performed. El Classification: CLASS 1 CLASS 2 El CLASS 3 1.0 Statement of problem:

Survey unit 04 includes some land owned by TransCanada and consists of the land between the access road and the Radwaste parking area. It contains a portion of the unnamed tributary (hereinafter called the brook) between the outflow of the two culverts that cross the access road near the gatehouse and the intake of the culverts that cross the road going down to the Radwaste parking area. The boundary between survey area 00L-05 and 0 0 L - 0 6 was stated to be along the boundary between US Gen (now TransCanada) property and Yankee property in the Historical Site Assessment (HSA). The original boundary (per the HSA) was adjusted just before this plan was written, so that the brook and its immediate surroundings would be in the same survey area. Survey unit 04 has a surface area of approximately 2,718 m2.

A final status survey for the area was performed in 2005. The 2005 survey focused only on the land that was to be covered with clean soils as part of an environmental restoration effort as the final step of a PCB remediation effort conducted in the unit. After that survey, the Final Status Survey group relinquished control of the unit because of the continuing impact from discharges from the West Storm Drain, the storm drains coming from the Radwaste parking area and the nearby access road where roll-off containers were staged for shipment. Release of the survey unit from FSS control was supported by the decision to perform a completely new FSS at a later time. Although this plan is identified as a revision of the 2005 survey plan, it represents a new FSSP.

This unit was reclassified from a Class 3 to a Class 2 at the beginning of the planning process, on the basis of its history and results of sampling since the HSA was written. The sample results from the 2005 survey support the reclassification of Survey Unit 04.

The objective of this final status survey plan is the collection of quality survey data in accordance with the LTP. The data collected under this plan will be used to determine whether or not residual plant-related radioactivity in soil of Survey Unit 00L-05-04 meet LTP release criteria.

The planning team for this effort consists of the FSS Project Manager, FSS Radiological Engineer, FSS Field DPF-8856.1 Page 1 of 5

Supervisor, and FSS Technicians. The FSS Radiological Engineer will make primary decisions with the concurrence of the FSS Project Manager.

2.0 Identify the decision:

Does residual plant-related radioactivity, if present in the survey unit, exceed the release criteria? Alternative actions that may be implemented in this effort are no action, investigation and/or remediation followed by a re-survey .

3.0 Identify the inputs to the decision:

Sample media: Soil Types of measurements: Soil samples and SPA-3 scans Applicable DCGLs: The DCGLs applied under this survey plan correspond to annual doses of 8.73mremly (the 10-mremly DCGL adjusted for the dose contributions from sub-surface concrete structures and tritium in ground water).

Radionuclides-of-concern: co60 and C S ' ~ ~

The data from 32 soil samples collected in the 2005 survey were used as the basis for this survey plan.

csI3' and co60 were identified at levels above their respective MDAs in several of those samples. One sample was sent to an offsite laboratory for analyses of the LTP HTD nuclides; none were identified.

Accordingly, ~s~~~and co60 were selected as the radionuclides of interest.

Surrogate DCGL: A surrogate DCGL is will not be used.

Investigation Level for soil samples: >DCGL, or a sum of DCGL fractions >1 .O.

Note: The investigation criteria apply to all LTP-listed nuclide identified in soil samples collected under this plan.

Radionuclidesfor analysis:

All LTP nuclides with the focus on co60 and C S ' ~ ~All . samples will be analyzed for all LTP gamma emitters that are not included in the HTD analysis. Two QC split samples will be sent off site for HTD MDCs for analysis of soil samples:

N S : MDC values will be transmitted to the outside laboratory via the chain-of-custody form accompanying the FSS soil samples.

DPF-8856.1 Page 2 of 5

~e~~ 1.oEfo3 ~u~~~ 1 .l E+OO ~ m ~ 1 .~l t+OO ~ ' ~ ~ ~

~i~~ 2.gE+O1 ~u~~~~~~~ 1.oE+OO Note: If a target MDC value cannot be achieved in analysis, then a value no greater than 5X the listed value must be achieved in the analysis.

J MC*~< %i\zqPb Scan coverage: SPA-3 scans will be performed over a m r wide path along the entire perimeter of the survey unit and for an area extending 3 meters perpendicular to the outfall flow direction and 3 meters in the downstream direction of each drain outfall.

Scan Investigation Level: Reproducible indication above background using S P A 3 and audible discrimination.

SPA-3 MDCWMDC: See Attachment 1.

QC checks and measurements: QC checks for the SPA-3 will be performed in accordance with DP-8504. QC checks for the Leica GPS will be performed in accordance with DP-8859. Two QC split samples will be collected, and QC recounts for 2 soil samples will be performed by the YNPS Chemistry Lab.

4.0 Define the boundaries of the survey:

Boundaries of 00L-05-04 are as shown on the attached map. The survey will be performed under appropriate weather conditions (as defined by instrumentation limitations and human tolerance). Surveys may be performed on any shift of work.

5.0 Decision Rules:

Upon review of the FSS data collected under this survey plan:

(a) If all the sample data show that the soil concentrations of LTP-listed nuclides are below the 8.73 mremlyear DCGLs and the sum of fractions of LTP-listed nuclides are below unity, then reject the null hypothesis (i.e., Survey Unit 00L-05-04 meets the release criteria).

(b) Ifthe investigation levels are exceeded, then perform an investigation survey.

(c) Lf the average concentration of any LTP-listed nuclide exceeds its respective DCGL, or the average sum of fractions of LTP-listed nuclides exceeds unity, then accept the null hypothesis (i.e., Survey Unit OOL-05-04 fails to meet the release criteria).

Note: Alternate actions include no action, investigations, reclassification, remediation and resurvey.

6.0 S ~ e c i f vtolerable limits on decision errors:

Null hypothesis: Residual licensed radioactive materials in Survey Unit 00L-05-04 exceed the LTP release criteria. Hypothesis testing is as follows:

Probability of type I error: 0.05 Probability oftype II error: 0.05 LBGR: Sum of Fractions 0.5; Adjusted = 0.83 7.0 Optimize Design:

Type of statistical test: WRS Test Sign Test Basis including background reference location (if WRS test is specified): NIA Number samples (per DP-8853): 15 Biased samples: Two (1 at the outfall of each storm drain).

GENERAL INSTRUCTIONS

1. Where possible, measurement locations will be identified using GPS in accordance with DP-8859. Each location will be marked to assist in identifying the location. Any locations that are not suitable for soil sampling will be relocated to the nearest suitable location and documented in the field log in accordance with DP-8856.

2. Soil samples shall be collected in accordance with DP-8120.

3. Chain of Custody forms shall be used in accordance with DP-8123 for all soil samples sent to an off-site DPF-8856.1 Page 3 of 5

laboratory.

4. All soil samples shall be received and prepared in accordance with DP-8813. Note: Split samples to be sent to an off-site lab will not be dried prior to counting on site or shipping.

5. Survey instrument: Operation of the E-600 w/SPA-3 will be in accordance with DP-8535 with QC checks performed in accordance with DP-8504. The instrument response checks shall be performed before issue and after use.

6. All SPA-3 scans will be performed with the audible feature activated. FSS Technicians will listen for upscale readings to which they will respond by slowing down or stopping the probe to distinguish between random fluctuations in the background and greater than background readings.

7. The job hazards associated with the survey described in this package are addressed in the Job Hazard Assessment (JHA) for 00L-05-04.

8. All personnel participating in this survey shall be trained in accordance with DP-8868.

SPECIFIC INSTRUCTIONS

1. If a designated sample location is obstructed for any reason, the FSS Radiological Engineer or the FSS Field Supervisor will select an alternate location in accordance with DP-8856. A detailed description of the alternate location will be recorded on form DPF-8856.2, the survey unit map will be annotated appropriately, and the alternate location will be conspicuously marked to facilitate re-visiting to identify and record the coordinates with GPS in accordance with DP-8859 or by measurement from a known reference point when GPS is not available.

2. Sample Requirements:

(a) Collect 15 (2-liter) systematic soil samples in accordance with DP-8120. Two of the soil samples will be analyzed as QC split samples. The same QC split samples will be sent to an offsite laboratory for analysis of all LTP-listed hard-to-detect nuclides.

(b) Collect 2 biased soil samples in accordance with DP-8120; 1 at the outfall for each of the storm drains that discharge to the unit. The FSS Field Supervisor is responsible for recording the sample location and sample number on the survey map and on DPF-8856.2.

3. Soil Sample Designations:

FSS soil samples 00L-05-04-070-F through 00L-05-04-084-F corresponding to FSS sample locations 070 through 084.

FSS biased soil samples 00L-05-04-085-F-B (from the West Storm Drain outfall) and OOL-05-04-086-F-B (from the parking lot storm drain outfall).

QC split samples: 00L-05-04-070-F-S and 00L-05-04-084-F-S are to be designated as QC split samples.

Recount samples: Recounts for samples 00L-05-04-076-F and 00L-05-04-08 1-F are to be designated 00L-05-04-076-F-RC and 00L-05-04-08 1-F-RC, respectively.

4. Sample Analysis:

Gamma analysis will be performed on all soil samples.

YNPS Chemistry will analyze 00L-05-04-076-F and 00L-05-04-081-F as sample recounts. The recounted samples will be identified as 00L-05-04-076-F-RC and 00L-05-04-08 1-F-RC, respectively.

On-site gamma analysis of the FSS samples shall achieve the MDC values stated in the DQO section of this plan. The MDCs will be communicated to the laboratory using an attachment to the Chain-of-Custody form.

YNPS Chemistry will analyze 00L-05-04-070-F-S and 00L-05-04-084-F-S for gamma-emitting nuclides prior to being sent to the off-site laboratory. These samples will be analyzed for gamma-emitting nuclides and HTD at the off-site laboratory. Ensure that the lid to the 1-liter Marinelli container is secured and sealed with electrical tape to prevent loss of moisture during shipping.

DPF-8856.1 Page 4 of 5

5. If the results for any FSS soil sample exceed an investigation level, an investigation survey will be performed under a revision to this plan.

6. S P A 3 scans, using a probe speed of no greater than 0.25mJs (approximately 10 inchesls), will be performed for the following areas:

A 1-meter wide path along the entire perimeter of the survey unit. It may be necessary to trim the vegetative growth for most of the area prior to scanning.

An area extending 3 meters perpendicular to the outfall flow direction and 3 meters in the downstream direction of each drain outfall.

7. For the S P A 3 scans, a first level investigation may be conducted to determine if the observed increase above background levels in the scan measurement is due to the presence of rocks. S P A 3 scans performed in non-impacted areas have shown that rock formations accounted for increased count rates. If it can be demonstrated that the presence of rocks is the cause of an increased count rate during a SPA-3 scan, record that finding on form DPF-8856.2. If it is demonstrated that the rocks do not account for an above background S P A 3 measurement, a soil sample will be collected at the point of the highest S P A 3 reading in the scanned area.

Detailed descriptions of investigation actions will be recorded on form DPF-8856.2 and the location of the above background scan and sample will be recorded on the survey map. The location description must include sufficient detail to revisit the spot at a later time. If a soil sample is collected during the first level investigation, the sample designation will continue the soil sample numbering sequence plus the letter "I" (for investigation).

Prepared by:

Reviewed by FSS Radiological Engineer

- c/,5/-

Approved by: ,,+

F ~ Project S

P-M a k r Date DPF-8856.1 Page 5 of 5

YNPS-FSSP-OOL-05-04-3 Attachment 1 SPA-3 Scan Tables Max Backaround V

Scan S ~ e e d BKG(cpm) MDCR MDC(fDCGL) InISec mlSec BKG (cpm) 4,000 639 1.15E+00 39 1.oo 0

YNPS-FSSP-OOL-05-04-3 Attachment 2 DCGL MDC Table

Final Status Survey Planning Worksheet Page I of 5 GENERAL SECTION Survey Area #: 00L-05 I Survey Unit #: 05 Survey Unit Name: Radwaste Paved Lot - East End FSSP Number: YNPS-FSSP-00L05-05-00 PREPARATION FOR FSS ACTIVITIES Check marks in the boxes below signify affirmative responses and completion of the action.

1.1 Files have been established for survey unit FSS records. 0 1.2 ALARA review has been completed for the survey unit. (YA-REPI-00-003-05) 1.3 The survey unit has been turned over for final status survey.  %

1.4 An initial DP-8854 walkdown has b en performed and a copy of the completed Survey Unit Walkdown Evaluation is in the survey area file.

YPg 1.5 Activities conducted within area since turnover for FSS have been reviewed.

Based on reviewed information, subsequent walkdown: )51not warranted warranted If warranted, subsequent walkdown has been performed and documented per DP-8854. 17 OR

'The basis has been provided to and accepted by the FSS Project Manager for not performing a subsequent walkdown. 17 1.6 A final classification has been performed.

Classification: CLASS 1 CLASS 2 CLASS 3 17 DATA QUALITY OBJECTIVES (DQO) 1.0 Statement of problem:

Survey Unit 00L-05-05 is the east inner section of 00L-05, approximately 16,362 ft2 (1 520 m2) in size. The unit is a portion of the US Gen-owned land that lies west of the industrial yard between the Yankee property and the Deerfield River It is currently part of the radioactive waste staging area parking lot. The staging of roll-offs has impacted the original classification (refer to the CR Action Item Response for items ti 2005-460-2 for details). As a result, the unit has been re-classified as Class 1.

The data collected under this plan will be used to determine whether or not residual plant-related radioactivity in soil of Survey Unit 00L05-05 meet LTP release criteria.

The planning team for this effort consists of the FSS Project Manager, FSS Radiological Engineer, FSS Field Supervisor, and FSS Technicians. The FSS Radiological Engineer will make primary decisions with the concurrence of the FSS Project Manager.

2.0 Identifv the decision:

Does residual plant-related radioactivity, if present in the survey unit. exceed LTP release criteria? Alternative actions that may be implemented in this effort are investigations and remediation followed by re-surveying.

3.0 Identify the inputs to the decision:

Sample media: soil Types of measurements: soil samples, lSOCS measurements, and supplemental SPA-3 scans.

Radionuclide-of-concern: Cs- 137 Soil sample data presented in the HSA were used in the planning for 00L-05-05. The concentration of plant-related radionuclides in most of those samples was below the detection sensitivity. Cs-137 was the only significant plant-related nuclide (identified at 0.41 1 pCi/g In 1 sample, all other concentrations were <MDA). However, those data were collected prior to use of the unit as a radioactive waste package staging area. Composite samples of soil from the comers and wheels of the staged roll-offs have identified both Co-60 and Cs-137.

The HSA data were used to obtain an estimate of Cs-137 variability, which was used to determine the number of systematic 3PF-8856.1

'age I of 5

soil samples required to support statistical. For added statistical power, 5 additional samples were added for a total number of 20 statistical soil samples.

Although the characterization data do not include analyses for hard-to-detect (HTD) nuclides such as H-3, Sr-90. and TRUs, these nuclides will be included in the assessment for Survey Unit 05. Two of the FSS soil samples will be sent to an independent laboratory for complete analyses (HTD nuclides and TRUs).

a. Soil Samoles:

For planning purposes, Cs-137 was selected as the radionuclide-of-concern for the unit. However, the presence of all LTP-listed radionuclides (gamma-emitters, HTD beta-emitters, and TRUs) in the soil will be evaluated under this survey plan. The YNPS Chemistry Dept. will analyze each soil sample for all LTP-listed gamma-emitting nuclides (excluding Am-241 and Cm-243). Two soil samples will be sent to an independent laboratory for analyses of gamma-emitters and HTD radionuclides (these analyses will include Am-241 and Cm-243).

Applicable DCGL: The DCGLs applied under this survey pIan correspond to annual doses of 8.73 mremly (the 10-mrem/y DCGL adjusted for the dose contributions from sub-surface concrete structures and tritium in ground water).

1 Nuclide ( DCGL (pCi!g) I Nuclide I DCGL (pCi/g) I Nuclide I DCG L (pCi/g) I Average concentration: Cs-137 = 0.0292 pCi/g Standard deviation (cr): Cs-137 = 0.0858 pCilg DCGLUH,:Cs-137 = 8.4 pCi!g (based on AF = 2.8)

Investigation Level for soil samples: (a) >DCGLEMcfor Cs- 137, or (b) a sum of DCGLEMcfractions >I .O, or (c) >DCGL for Cs-137 and a statistical outlier as defined in the LTP Note: the same criteria will be applied to any other LTP-listed if identified in the FSS soil samples.

MUCs for gamma unalysis ofsoil samples:

Nuclide Target MDC Nuclide Target MDC Nuclide Target MDC (pCi/s) (pCi/g) (pCi/g) t Co-60 1.4E-1 Sb125 l.IE+O Eu- 152 3.5E-1 Nb-94 2.5E-I CS- 134 1.7E- I Eu- 154 3.3E-1 I

Ag l O8m I I

2.5E-1 I

Cs-137 I I

3.OE-1 I

Eu-1 55 1 1.4E+1 Note: If a target MDC value cannot be achieved in analysis, then a value no greater than 5X the listed value must be achieved in the analysis.

MDCs for analyses of HTD nuclides:

Nuclide Target MDC Nuclide Target MDC Nuclide Target MDC (PC?~) (pCi/g) (pCi/g)

H-3 1.3E+1 Sr-90 5.9E-2 Pu-24 1 3.4E+ 1 C-14 1.9E-1 Tc-99 4.8E-1 Am-241 1.OE+O Fe-55 1.OE+3 Pu-238 1.1E+O Cm-2431244 1. I E+O N i-63 2.8E+1 Pu-2391240 1.OE+O Note: If a target MDC value cannot be achieved in analysis, then a value no greater than 5X the listed value must be achieved in the analysis.

b. Scan Coverage:

Scanning for 100% of the surface area within 00L05-05 will be accomplished through ISOCS measurements and supplemental SPA-3 scans. S P A 3 scans, as deemed necessary by the FFS Field Supervisor, will be performed to supplement ISOCS measurements or to provide scan coverage for surface area not included in the ISOCS measurements.

DPF-8856.1 YNPS-FSSP-00L05-05-00 Page 2 of 5

Investigation Level for lSOCS measurements: 0.7 pCi/g for Cs-137, or a sum of the fiactions for detected LTP nuclides > 1.0 N B : The investigation levels developed in this manner (in accordance with YA-EVAL-00-001-06) are sensitive enough to detect the DCGLEMcvalues based on the grid area.

MDCs for ISOCS measurements:

N a : The MDCs listed in the above table are equal to the investigation level for ISOCS measurements. Contact the FSSE if the MDC values in the above table cannot be achieved in a reasonable count time.

Investigation Level for SPA-3 scan: >background indication using an audible signal with headphones MDCR for SPA-3: Attachment 1 provides MDCR values by various background levels.

MDC@CGL,<M<.) for SPA-3 scans: Attachment 1 also provides MDC values by various background levels.

c. QC checks and measurements: QC checks for the SPA-3 will be performed in accordance with DP-8504. QC checks for ISOCS will be in accordance with DP-8869 and DP- 887 1 . QC checks for the Leica GPS will be performed in accordance with DP-8859. Two QC split samples will be collected, and QC recounts for 2 soil samples will be performed by the YNPS Chemistry Lab.

4.0 Define the boundaries of the survey:

Boundaries of 00L05-05 are as shown on the attached map. The survey will be performed under appropriate weather conditions (as defined by instrumentation limitations and human tolerance). Surveys may be performed on any shift of work.

5.0 Decision Rules:

Upon review of the FSS data collected under this survey plan:

(a) If all the sample data show that the soil concentrations of LTP-listed nuclides are below the 8.73 mremlyear DCGLs and the sum of fractions of LTP-listed nuclides are below unity, then reject the null hypothesis (i.e., Survey Unit 00L-05-05 meets the release criteria).

(b) lfthe investigation levels are exceeded, then perform an investigation survey.

(c) Lfthe average concentration of any LTP-listed nuclide exceeds its respective DCGL, or the average sum of fiactions of LTP-listed nuclides exceeds unity, then accept the null hypothesis (i.e., Survey Unit 00L-05-05 fails to meet the release criteria).

Note: Alternate actions include investigations, reclassification, remediation and resurvey.

6.0 Specifv tolerable limits on decision errors:

Null hypothesis: Residual plant-related radioactivity in Survey Unit 00L05-05 exceeds the release criteria.

Probability of type I error: 0.05 Probability of type I1 error: 0.05 LBGR: 1.5 7.0 Optimize Design:

Type of statistical test: WRS Test Cl Sign Test Basis including background reference location (if WRS test is specified): NIA Number samples (per DP-8853): 15 + 5 additional = 20 Biased samples: None GENERAL INSTRUCTIONS

1. Where possible, measurement locations will be identified using GPS in accordance with DP-8859. Each location will be marked to assist in identifying the location. Any locations that are not suitable for soil sampling will be relocated to the nearest suitable location and documented in the field log in accordance with DP-8856.

2 . Standing water must be removed prior to the collection of any FSS measurement in that area.

3. Soil samples shall be collected in accordance with DP-8120.

DPF-8856.1 Page 3 of 5

4.

5.

Chain of Custody forms shall be used in accordance with DP-8123 for all soil samples sent to an off-site laboratory.

All soil samples shall be received and prepared in accordance with DP-8813. Note: Split samples to be sent to an off-site X

lab will not be dried prior to counting on site or shipping.

I 6. Collect ISOCS measurements in accordance with DP-887 I to provide 100% scan coverage of the survey unit. Perform a 7.

SPA3 scan for 100% of any area excluded by the ISOCS measurements.

Survey instrument: Operation of the E-600 w/SPA-3 will be in accordance with DP-8535 with QC checks performed in I

accordance with DP-8504. The instrument response checks shall be performed before issue and after use.

8. All SPA-3 scans will be performed with the audible feature activated. FSS Technicians will listen for upscale readings to which they will respond by slowing down or stopping the probe to distinguish between random fluctuations in the background and greater than background readings.

I 9. The job hazards associated with the survey described in this package are addressed in the accompanying Job Hazard Assessment (JH A) for 00L-05-05.

All personnel participating in this survey shall be trained in accordance with DP-8868.

SPECIFIC INSTRUCTIONS

1. All designated measurement locations will be identified by GPS per DP-8859 or by use of reference points and tape measure as necessary. If a designated sample location is obstructed for any reason, the FSS Radiological Engineer or the FSS Field Supervisor will select an alternate location in accordance with DP-8856. A detailed description of the alternate location will be recorded on form DPF-8856.2, the survey unit map will be annotated appropriately, and the alternate location will be conspicuously marked to facilitate re-visiting to identify and record the coordinates with GPS in accordance with DP-8859 or by measurement from a known reference point when GPS is not available.

1 2. Sample Requirements: 1 I

Collect 20 (I-liter) soil samples in accordance with DP-8120. Two of the 20 soil samples will be analyzed as QC split samples to fulfill the QC requirement of DP-8852. The same QC split samples will also be analyzed for Hard-to-Detect nuclides in accordance with section 5.6.3.2.1 of the LTP and DP-8856.

1 3. Soil Sample Designations: 1 FSS soil samples: 00L-05-05-00 1 -F through 00L-05-05-020-F locations 00 1 through 020.

QC split samples: 00L-05-05-002-F-S and 00L-05-05-0 14-F-S are to be designated as QC split samples.

Recount samples: 00L-05-05-003-F-RC and 00L-05-05-0 1 3-F-RC are to be counted twice on site. The results will be compared in accordance with DP-8864.

1 4. Sample Analysis:

l Gamma analysis will be performed on all soil samples. If any of the gamma analyses show that an investigation level has been exceeded an investigation survey will be conducted under a revision to this survey plan.

H I YNPS Chemistry will analyze 00L-05-05-003-F and 00L-05-05-013-F as sample recounts. The recounted samples will be identified as 00L-05-05-003-F-RC and 00L-05-05-013-F-RC, respectively.

H R On-site gamma analysis of the FSS samples shall achieve the MDC values stated in the DQO section of this plan.

The MDCs will be communicated to the laboratory using an attachment to the Chain-of- Custody form.

The off-site laboratory will analyze 00L-05-05-002-F-S and 00L-05-05-014-F-S for all LTP nuclides. Each I

sample will be prepared in accordance with DP-8813, "Sample Receipt and Preparation," but are not to be dried prior to shipment.

Note: Ensure that the lid of the container is secured and sealed with electrical tape to prevent loss of moisture during shipping.

5. ISOCS Assays:

ISOCS investigation levels are based on specific spacing of ISOCS assays. ISOCS assays, when using the 180" collimator at I-meter, are restricted to:

DPF-8856.1 Page 4 of 5

(1 ) A maximum spacing of 4 meters between assay locations. A maximum spacing of 2 meters from any survey unit boundary.

ISOCS assays are designated as 00L-05-05-xxx-F-G where xxx corresponds to the 3-digit location indicated on survey map "ISOCS Scans".

QC checks shall be performed daily in accordance with DP-8869 and DP-8871. Resolve flags encountered prior to survey.

H ISOCS assays to be performed with 180' collimator at Im unless otherwise directed by the FSS Engineer. Make note on the daily survey journal (DPF-8856.2) if other geometries are used.

Designate additional assay locations in continuing sequence from the last number assigned to an FSS measurement.

Record detailed information about additional assay locations on the daily survey journal.

II If the results on any ISOCS assay exceed an investigation level, investigate the area within the field of view (7m diameter - 38.5m2 area for 180"-lm) for that assay as directed in Specific Instruction # 6 .

6. If the results of an ISOCS assay exceed an investigation level, perform a first level investigation as follows:

Note: Detailed descriptions of investigation actions shall be recorded in the daily survey journal (DPF-8856.2). Scan the ISOCS footprint with a SPA-3 in rate-meter mode moving the detector at a speed of 0.25m or less per second, keeping the probe at a distance of approximately 3" from the surface and following a serpentine path that includes at least 3 passes across each square meter.

Mark the boundaries around any detected elevated areas in the soil and identify the boundaries on a survey map.

! Measure the total area of each outlined area in square centimeters.

Mark the location of the highest identified activity for the elevated area in the soil and on the survey map.

1I At location of the highest identified activity area:

Perform and record a I-minute scaler mode SPA-3 measurement. Designate the reading as "00L-05-05-xxx-F-SC-1I I I" where "xxx" continues sequentially from the last number assigned to an FSS measurement.

I Obtain a soil sample at the location. Designate the sample as "00L-05-05-xxx-F-I" where "xxx" continues sequentially fiom the last number assigned to an FSS measurement.

Perform and record a post sample I-minute S P A 3 measurement. Designate the reading as described 1 above.

I

~ Re-perform the ISOCS assay. Designate the assay as "00L-05-05-xxx-F-G-I" where "xxx" continues sequentially from the last number assigned to an FSS measurement. I Date 7- a - o L Date 7/Zo/Ob FSQ ~ h d i o l o ~ i cEngineer,,

al ate zh,.A DPF-8856.1 Page 5 of 5

YNPS-FSSP-OOL-05-05-00 Attachment 1 SPA-3 Scan Tables Max Background Scan Speed BKG(cpm) MDCR MDC(fDCGLemc) InISec m1Sec BKG (cpm) 4,000 639 4.72E-01 39 1.OO 4,000

+ioll +m +019!

+D2 +kE3 +m +016/

+pj +m

+loosl +ioosl +pol +m +oosi +loloi

+oozi +m +E@

+pij

Area: Area 1 X Coord Y Coord Label Value TYPe Historical 271782.2510 3093601.4338 001 Systematic 271 766.8833 3093628.0514 002 Systematic 271 797.6187 3093628.0514 003 Systematic 271828.3540 3093628.0514 004 Systematic 271751.5157 3093654.6690 005 Systematic 271782.2510 3093654.6690 006 Systematic 271 812.9864 3093654.6690 007 Systematic 271 843.7217 3093654.6690 008 Systematic 271 874.4570 3093654.6690 009 Systematic 271 905.1924 3093654.6690 010 Systematic 271 766.8833 3093681.2866 01 1 Systematic 271797.6187 3093681.2866 012 Systematic 271828.3540 3093681.2866 013 Systematic 271 859.0894 3093681.2866 014 Systematic 271 889.8247 3093681.2866 015 Systematic 271920.5601 3093681.2866 016 Systematic 271 812.9864 3093707.9042 017 Systematic 271843.7217 3093707.9042 018 Systematic 271 874.4570 3093707.9042 019 Systematic 271859.0894 3093734.5218 020 Systematic

Final Status Survey Planning Worksheet Page 1 of 5 GENERAL SECTION Survey Area #: 00L-05 I Survey Unit #: 06 Survey Unit Name: Radwaste Paved Lot - East End FSSP Number: YNPS-FSSP-OOL05-05-00 PREPARATION FOR FSS ACTIVITIES Check marks in the boxes below signify affirmative responses and completion of the action.

1.1 Files have been established for survey unit FSS records. L3 1.2 ALARA review has been completed for the survey unit. I 3 (YA-REPT-00-003-05) 1.3 The survey unit has been turned over for final status survey.

a 1.4 An initial DP-8854 walkdown ha been performed and a copy of the completed Survey Unit Walkdown Evaluation is in the survey area file.

1.5 Activities conducted within area since turnover for FSS have been reviewed.

Based on reviewed information, subsequent walkdown: x n o t warranted warranted If warranted, subsequent walkdown has been performed and documented per DP-8854.

OR The basis has been provided to and accepted by the FSS Project Manager for not performing a subsequent walkdown.

R 1.6 A final classification has been performed. pd Classification: CLASS 1 CLASS 2 CLASS 3 DATA QUALITY OBJECTIVES (DQO) 1.0 Statement of problem:

Survey Unit 00L-05-06 is the west inner section of 00L-05, approximately 10,090ft2 (937 m') in size. The unit is a portion of the US Gen-owned land that lies west of the industrial yard between the Yankee propem and the Deerfield River. It is currently part of the radioactive waste staging area parking lot. The staging of roll-offs has impacted the original classification (refer to the CR Action Item Response for items # 2005-460-2 for details). As a result, the unit has been re-classified as Class 1 .

The data collected under this plan will be used to determine whether or not residual plant-related radioactivity in soil of Survey Unit 00L05-06 meet LTP release criteria.

The planning team for this effort consists of the FSS Project Manager, FSS Radiological Engineer, FSS Field Supervisor, and FSS Technicians. The FSS Radiological Engineer will make primary decisions with the concurrence of the FSS Project Manager.

2.0 Identifv the decision:

Does residual plant-related radioactivity, if present in the survey unit, exceed LTP release criteria? Alternative actions that may be implemented in this effort are investigations and remediation followed by re-surveying.

3.0 Identifv the inputs to the decision:

Sample media: soil Types ofmeasurements: soil samples, ISOCS measurements, and supplemental SPA-3 scans.

Radionuclide-of-concern: Cs- 137 Soil sample data presented in the HSA were used in the planning for 00L-05-06. The concentration of plant-related radionuclides in most of those samples was below the detection sensitivity. Cs-137 was the only significant plant-related nuclide (identified at 0.41 1 pCi/g in 1 sample, all other concentrations were <MDA). However, those data were collected prior to use of the unit as a radioactive waste package staging area. Composite samples of soil from the corners and wheels of the staged roll-offs have identified both Co-60 and Cs-137.

The HSA data were used to obtain an estimate of Cs-137 variability, which was used to determine the number of systematic A DPF-8856.1 Page I of 5

soil samples required to support statistical. For added statistical power, 5 additional samples were added for a total number of 20 statistical soil samples.

Although the characterization data do not include analyses for hard-to-detect (HTD) nuclides such as H-3, Sr-90, and TRUs, these nuclides will be included in the assessment for Survey Unit 06. Two of the FSS soil samples will be sent to an independent laboratory for complete analyses (HTD nuclides and TRUs).

1 a. soil Samples: I For planning purposes, Cs-137 was selected as the radionuclide-of-concern for the unit. However, the presence of all LTP-listed radionuclides (gamma-emitters, HTD beta-emitters, and TRUs) in the soil will be evaluated under this survey plan. The YNPS Chemistry Dept. will analyze each soil sample for all LTP-listed gamma-emitting nuclides (excluding Am-241 and Cm-243). Two soil samples will be sent to an independent laboratory for analyses of gamma-emitters and HTD radionuclides (these analyses will include Am-24 I and Cm-243).

Applicable DCGL: The DCGLs applied under this survey plan correspond to annual doses of 8.73 mrem!y (the 10 DCGL adjusted for the dose contributions from sub-surface concrete structures and tritium in ground water).

Nuclide DCGL (pCi/g) Nuclide DCGL (pCi/g) Nuclide DCGL (pCi/g)

Co-60 1.4E+O Eu- 152 3.5E+O Sr-90 5.9E-1 Nb-94 2.5E+O Eu-1 54 3.3E+O Tc-99 4.8E+O CS-134 1.7E+O C-14 1.9E+O Pu-24 1 3.4E+2 Cs- I37 3.0E+O Fe-55 1 .OE+4 Am-24 1 I .OE+ I Ni-63 2.8Et2 Cm-2431244 I . 1E+ 1 Average concentration: Cs- 137 = 0.0292 pCi/g Standard deviation (a): Cs- 137 = 0.0858 pCi/g DCGL,:,b+(.: Cs-I 37 = 9.3 pCi/g (based on AF = 3.1)

Investigation Level for soil samples: (a) >DCGLEMcfor Cs- 137, or (b) a sum of DCGLEMcfractions > 1 .O, or (c) >DCGL for Cs-137 and a statistical outlier as defined in the LTP Note: the same criteria will be applied to any other LTP-listed if identified in the FSS soil samples.

MDCsfor gamma analysis of soil samples:

Nuclide Target MDC Nuclide Target MDC Nuclide Target MDC (pCi/g) (pCi!g) (pCi!g)

Co-60 1.4E-1 Sbl25 1. I E+O Eu- 152 3.5E-1 Nb-94 2.5E-1 CS-134 1.7E- 1 Eu- 154 3.3E-1 Agl08m 2.5E- 1 CS-137 3.OE-1 Eu- 155 1.4E+ l L

Note: If a target MDC value cannot be achieved in analysis, then a value no greater than 5X the listed value must be achiel in the analysis.

MDCs for analyses of HTD nuclides:

! Nuclide Target MDC Nuclide Target MDC Nuclide Target MDC (pCi/g) (pCi/g> (pCi/g>

H-3 1.3E+ 1 Sr-90 5.9E-2 Pu-24 1 3.4E+1 1 C-14 1.9E-1 Tc-99 4.8E- 1 Am-24 1 I .OE+O I I

1 I I I I Ni-63 2.8E+1 I Pu-2391240 1 .OE+O Note: If a target MDC value cannot be achieved in analysis, then a value no greater than 5X the listed value must be achieved in the analysis.

6. Scan Coveraae:

Scanning for 100% of the surface area within 00L05-05 will be accomplished through ISOCS measurements and supplemental SPA-3 scans. SPA-3 scans, as deemed necessary by the FFS Field Supervisor, will be performed to supplement ISOCS measurements or to provide scan coverage for surface area not included in the lSOCS measurements.

DPF-8856. I Page 2 of 5

1lnvestigation Level for lSOCS measurements: 0.7 pCi/g for Cs-137, or a sum of the fractions for detected LTP nuclides > 1.0 1 Note: The investigation levels developed in this manner (in accordance with YA-EVAL-00-001-06) are sensitive enough to detect the DCGLFMcvalues based on the grid area.

MDCs for ISOCS measurements:

Note: The MDCs listed in the above table are equal to the investigation level for lSOCS measurements. Contact the FSSE if the MDC values in the above table cannot be achieved in a reasonable count time.

Investigation Level for SPA-3 scan: >background indication using an audible signal with headphones MDCR jor SPA-3: Attachment I provides MDCR values by various background levels.

MDC(fDCGL,lh,,,) for SPA-3 scans: Attachment 1 also provides MDC values by various background levels.

c. QC checks and measurements: QC checks for the S P A 3 will be performed in accordance with DP-8504. QC checks for ISOCS will be in accordance with DP-8869 and DP- 8871. QC checks for the Leica GPS will be performed in accordance with DP-8859. Two QC split samples will be collected, and QC recounts for 2 soil samples will be performed by the YNPS Chemistry Lab.

4.0 Define the boundaries of the survey:

Boundaries of 00L05-05 are as shown on the attached map. The survey will be performed under appropriate weather conditions (as defined by instrumentation limitations and human tolerance). Surveys may be performed on any shift of work.

H 5.0 Decision Rules:

Upon review of the FSS data collected under this survey plan:

H H (a) Hall the sample data show that the soil concentrations of LTP-listed nuclides are below the 8.73 mrem/year DCGLs and the sum of fractions of LTP-listed nuclides are below unity, then reject the null hypothesis (i.e., Survey Unit 001,-05-066meets the release criteria).

1 (b) lfthe investigation levels are exceeded, thenperform an investigation survey. 1 (c) If the average concentration of any LTP-listed nuclide exceeds its respective DCGL, or the average sum of fractions of LTP-listed nuclides exceeds unity, then accept the null hypothesis (i.e., Survey Unit 00L-05-06 fails to meet the release criteria).

Note: Alternate actions include investigations, reclassification, remediation and resurvey.

6.0 S ~ e c i f vtolerable limits on decision errors:

Null hypothesis: Residual plant-related radioactivity in Survey Unit 00L05-06 exceeds the release criteria.

Probability of type I error: 0.05 Probability o f type I/ error: 0.05 11 LBGR: 1.5 7.0 Optimize Design:

Type of statistical test: WRS Test C1 Sign Test Basis including background rejerence location (if WRS test is specified): N/A Number samples (per DP-8853): 15 + 5 additional = 20 Biased samples: None L

GENERAL INSTRUCTIONS u

1. Where possible. measurement locations will be identified using GPS in accordance with DP-8859. Each location will marked-to assist in identifying the location. Any locations that are not suitable for soil sampling will be relocated to nearest suitable location and documented in the field log in accordance with DP-8856.

112. Standing water must be removed prior to the collection of any FSS measurement in that area. 1

3. Soil samples shall be collected in accordance with DP-8120.

I DPF-8856.1 Page 3 of 5

4. Chain of Custody forms shall be used in accordance with DP-8123 for all soil samples sent to an off-site laboratory.

5. All soil samples shall be received and prepared in accordance with DP-88 13. Note: Split samples to be sent to an off-site n

lab will not be dried prior to counting on site or shipping.

6. Collect ISOCS measurements in accordance with DP-8871 to provide 100% scan coverage of the survey unit. Perform a SPA-3 scan for 100% of any area excluded by the ISOCS measurements.

7. Survey instrument: Operation of the E-600 w/SPA-3 will be in accordance with DP-8535 with QC checks performed in accordance with DP-8504. The instrument response checks shall be performed before issue and afier use.

8. All SPA-3 scans will be performed with the audible feature activated. FSS Technicians will listen for upscale readings to which they will respond by slowing down or stopping the probe to distinguish between random fluctuations in the background and greater than background readings.

9. The job hazards associated with the survey described in this package are addressed in the accompanying Job Hazard Assessment (JHA) for 00L-05-06.

1 All personnel participating in this survey shall be trained in accordance with DP-8868.

L 1

SPECIFIC INSTRUCTIONS

1. All designated measurement locations will be identified by GPS per DP-8859 or by use of reference points and tape measure as necessary. If a designated sample location is obstructed for any reason, the FSS Radiological Engineer or the FSS Field Supervisor will select an alternate location in accordance with DP-8856. A detailed description of the alternate location will be recorded on form DPF-8856.2, the survey unit map will be annotated appropriately, and the alternate 1 2.

location will be conspicuously marked to facilitate re-visiting to identify and record the coordinates with GPS in accordance with DP-8859 or by measurement from a known reference point when GPS is not available.

Sample Requirements:

HI 3.

Collect 20 (]-liter) soil samples in accordance with DP-8120. Two of the 20 soil samples will be analyzed as QC split samples to fulfill the QC requirement of DP-8852. The same QC split samples will also be analyzed for Hard-to-Detect nuclides in accordance with section 5.6.3.2.1 ofthe LTP and DP-8856.

Soil Sample Designations:

I FSS soil samples: 00L-05-06-00 1 -F through 00L-05-06-020-F corresponding to FSS sample locations 00 1 through 020.

QC split samples: 00L-05-06-009-F-S and 00L-05-06-019-F-S are to be designated as QC split samples.

Recount samples: 00L-05-06-006-F-RC and 00L-05-06-0 I I-F-RC are to be counted twice on site. The results will be compared in accordance with DP-8864.

4. Sample Analysis:

Gamma analysis will be performed on all soil samples. If any of the gamma analyses show that an investigation 1I level has been exceeded an investigation survey will be conducted under a revision to this survey plan.

YNPS Chemistry will analyze 00L-05-06-006-F and 001,-05-06-013-F as sample recounts. The recounted samples will be identified as 00L-05-06-006-F-RC and 00L-05-06-0 1 I -F-RC, respectively.

On-site gamma analysis of the FSS samples shall achieve the MDC values stated in the DQO section of this plan.

The MDCs will be communicated to the laboratory using an attachment to the Chain-of- Custody form.

I The off-site laboratory will analyze 00L-05-06-009-F-S and 00L-05-06-019-F-S for all LTP nuclides. Each sample will be prepared in accordance with DP-88 13, "Sample Receipt and Preparation," but are not to be dried prior to shipment.

@: Ensure that the lid of the container is secured and sealed with electrical tape to prevent loss of moisture during shipping.

5. ISOCS Assays:

lSOCS investigation levels are based on specific spacing of ISOCS assays. ISOCS assays, when using the 180" collimator at 1 -meter, are restricted to:

U 4 DPF-8856. I YNPS-FSSP-00L05-06-00 Page 4 o f 5

n (1) A maximum spacing of 4 meters between assay locations. A maximum spacing of 2 meters from any survey unit 1 I/ boundary.

l lSOCS assays are designated as OOL-05-06-xxx-F-G where xxx corresponds to the 3-digit location indicated on survey map "ISOCS Scans". I/

I QC checks shall be performed daily in accordance with DP-8869 and DP-8871. Resolve flags encountered prior to 1 I ISOCS assays to be performed with 180° collimator at Im unless otherwise directed by the FSS Engineer. Make note on the daily survey journal (DPF-8856.2) ifother geometries are used.

Designate additional assay locations in continuing sequence from the last number assigned to an FSS measurement.

H Record detailed information about additional assay locations on the daily survey journal.

If the results on any ISOCS assay exceed an investigation level, investigate the area within the field of view (7m diameter - 38.5m2 area for 180"-lm) for that assay as directed in Specific Instruction # 6.

1 6. If the results of an ISOCS assay exceed an investigation level, perform a first level investigation as follows:

I m: Detailed descriptions of investigation actions shall be recorded in the daily survey journal (DPF-8856.2). Scan the ISOCS footprint with a SPA-3 in rate-meter mode moving the detector at a speed of 0.25m or less per second, keeping the probe at a distance of approximately 3" from the surface and following a serpentine path that includes at least 3 passes across each square meter.

Mark the boundaries around any detected elevated areas in the soil and identify the boundaries on a survey map.

Measure the total area of each outlined area in square centimeters.

I Mark the location of the highest identified activity for the elevated area in the soil and on the survey map.

/I At location of the highest identified activity area:

H I

Perform and record a I -minute scaler mode SPA-3 measurement. Designate the reading as "00L-05-06-xxx-F-SC-I" where "xxx" continues sequentially from the last number assigned to an FSS measurement.

I Obtain a soil sample at the location. Designate the sample as "00L-05-06-xxx-F-I" where "xxx" continues sequentially from the last number assigned to an FSS measurement.

Perform and record a post sample 1 -minute S P A 3 measurement. Designate the reading as described above.

Re-perform the ISOCS assay. Designate the assay as "00L-05-06-xxx-F-G-I" where "xxx" continues I

sequentially from the last number assigned to an FSS measurement. d Prepared by g. Date 7-20-o~

R dio ic 1 E ineer Reviewed by Date FS R dialogical Engineer Approved by WY)d&

~ S Project S h6nager DPF-8856.1 Page 5 of 5

8 It I Ill ( 1 1 / 1 I l l l l l l l 4 I Final Status Survey Planning Worksheet GENERAL SECTION Survey Area #: 00L-05 I Survey Unit #: 07 Survey Unit Name: TransCanada / Deerfield River Frontage FSSP Number: YNPS-FSSP-00L-05-07-00 PREPARATION FOR FSS ACTIVITIES Check marks in the boxes below signify affirmative responses and completion of the action.

1.1 Files have been established for survey unit FSS records. El 1.2 ALARA review has been completed for the survey unit. El Refer to YA-REPT-003-05 1.3 The survey unit has been turned over for final status survey.

1.4 An initial DP-8854 walkdown has been performed and a copy of the completed Survey Unit Walkdown Evaluation is in the survey area file. El 1.5 Activities conducted within area since turnover for FSS have been reviewed. El Based on reviewed information, subsequent walkdown: not warranted warranted If warranted, subsequent walkdown has been performed and documented per DP-8854.

OR The basis has been provided to and accepted by the FSS Project Manager for not performing a subsequent walkdown.

1.6 A final classification has been performed. 0 Classification: CLASS 1 CLASS 2 CLASS 3 El 1.0 Statement of problem:

Survey unit 07 includes some land owned by TransCanada and is surrounding the west end of the unnamed tributary. This unit is bordered by survey unit 00L-05-03 to the north, survey unit 00L-05-01 to the south, survey unit 00L-05-08 to the east and the Deerfield River to the west. Unit 07 has an area of approximately 2468 m2.

This unit is classified as a Class 3 area at the beginning of the planning process on the basis of its history and results of sampling since the HSA was written.

The problem at hand is to determine if the years of plant operation and decommissioning activities resulted in an accumulation of plant-related radioactivity that exceed the LTP release criteria.

The planning team for this effort consists of the FSS Project Manager, FSS Radiological Engineer, FSS Field Supervisor, and FSS Technicians. The FSS Radiological Engineer will make primary decisions with the concurrence of the FSS Project Manager.

2.0 Identifi the decision:

Does residual plant-related radioactivity, if present in the survey unit, exceed the release criteria? Alternative actions that may be implemented in this effort are investigation, remediation and/or resurvey.

3.0 Identifi the inputs to the decision:

Sample media: soil L

DPF-8856.1 Page 1 of 6

Types of measurements: Soil samples and scan investigations will be done with a E600 w/SPA-3.

Applicable DCGL's: 1.4 pCi/g (Co-60), 3.0 pCi/g (Cs-137), 130.0 pCi/g (H-3). All DCGL's are based on the 8.73-mrem/y DCGL. ,%\doL Radionuclides-ofconcern:Co-60, Cs- 137, H-3-f NOTE: Sr-90 and Agl08m were mentioned as radionuclides-of-concern in the HSA for 00L-05 but there is no data to indicate that these nuclides were identified in this survey unit.

Characterization data include 12 sediment samples that were screened by gamma spectroscopy. These twelve samples and information from the spill history form the basis for FSS planning. There is no data for H-3 levels in this unit.

Average concentrations: Co-60: 0.073 pCi/g; Cs-137: 0.222 pCi/g Standard deviations(o): Co-60: 0.106 pCi/g; Cs-137 = 0.147 pCi/g Surrogate DCGL: The use of surrogate DCGL's is not anticipated, but can be implemented on the basis of HTD results which are not available at the time of this FSS but will be available at the time of data analysis.

Investigation Levelfor soil samples: 0.7pCiIg (Co-60) and 1.5pCiIg (Cs-137) (> 50% of the 8.73-mrem/y DCGL for Cs- 137)

Additionally if any other LTP listed nuclide is identified at a concentration greater than 50% of its respective 8.73-mremly DCGL, or if the sum of the fractions for all detected LTP listed nuclides exceeds 0.5, an investigation will be conducted.

Investigation Levelfor scan: Reproducible indication above background using SPA 3 and audible discrimination. The expected background range for SPA-3 scan is between 8,000 cpm and 15,000 cpm, and is dependent on the geology (rock composition) in the immediate vicinity of the scan.

Table 1 DCGLs for Gamma Emitters Nuclide Soil DCGL (pCi/a)

Co-60 1.4E+O Nb-94 2.5E+O Ag-108m 2.5E+O Sb-125 l.lE+S CS-134 1.7E+O Cs-137 3.OE+O Eu-1 52 3.6E+O Eu-1 54 3.3E+O Eu-155 1.4E+2 Radionuclides for analysis: All LTP nuclides with the focus on Co-60, Cs-137 and H-3. All samples will be analyzed for all LTP gamma emitters that are not included in the HTD and H-3 analysis. One sample will be sent off site for HTD analysis.

MDC S for gamma analysis of soil samples:

Nuclide 10% of DCGL (pCi/a)

Co-60 1.4E-1 Nb-94 2.5E-1 Ag-108m 2.5E-1 Sb-125 l.IE+O CS-134 1.7E-1 CS-137 3.OE-1 DPF-8856.1 Page 2 of 6

Eu-1 52 3.6E-1 Eu-1 54 3.3E-1 Eu-1 55 1.4E+1 The desired MDC's in the laboratory analyses of FSS soil samples will be the 10% DCGL values. If it is impractical to achieve those, the 50% DCGL values must be achieved in the laboratory analyses of the FSS soil samples.

MDC's for HTD nuclides: In addition to the MDC values listed above, the following MDC values will also be transmitted to the outside laboratory via the chain-of-custody form accompanying the FSS soil samples:

Nuclide 10% DCGL (pCi/g)

H-3 1.3E+1 C-14 1.9E-1 Fe-55 1.OE+3 Ni-63 2.8E+1 Sr-90 6.OE-2 Tc-99 5.OE-1 Pu-23 8 1.2E+O Pu-239 l.lE+O Pu-24 1 3.4E+1 Am-24 1 1.OE+O Cm-243 l.lE+O The MDC values for difficult to detect nuclides will be conveyed to the outside laboratory via the sample chain-of-custody form DPF-8823.1 which will accompany the soil samples. Again, these are the desired MDCs, if these are not practical to achieve, five times these values must be achieved.

Scan coverage: SPA-3 scans will be performed over an approximate l m by l m area surrounding each soil sample, as permitted by terrain. Four (4) judgmental SPA-3 scans will be performed in Survey Unit 00L 07, each of which will cover an area of approximately 10 m2 (1 m in width and 10 m in length).

The first scan area will be along the creek bed at the first bend.

The second area will be along the creek bed at the second bend.

The third area will be at the north end of the creeks outfall into the river.

The fourth area will be at the south end of the creeks outfall into the river.

MDCR for SPA-3: The accompanying table in Attachment 1 provides MDCR values by various background levels.

MDC r'jDCGL,,,ey,,.e,J for SPA-3 scans: The accompanying table in Attachment 1 provides MDC values by various background levels.

Note: Any radiation levels detected above background in a Class 3 Survey Unit should be investigated. A Class 3 Survey Unit is expected to have minimal contamination and not expected to have any hot spots.

MARSSIM recommends scanning in a Class 3 Survey Unit be performed to verify proper classification. Scan MDC is not tied to the DCGLw in a Class 3 Survey Area and therefore scanning to levels above background is a measure of due-diligence on the appropriateness of the classification.

(htt~://www.orau.gov/ddsc/expert/answers/marssi~i~.htm questionlanswer dated 2/4/2003)

QC checks and measurements: QC checks for the Leica GPS will be performed in accordance with DP-8859.

QC checks for the SPA-3 will be performed in accordance with DP-8504.

QC split sample will be collected (note: this is in accordance with DP-8852 requirements.)

DPF-8856.1 Page 3 of 6

m Q C recount for soil samples will be performed by the YNPS Chemistry Lab (note: This is in accordance with DP-8852 requirements.)

4.0 Define the boundaries of the survey:

Boundaries of Survey Unit 07 are as shown on the attached map. This area will be posted as an FSS area.

There are no structures present in the Survey Unit 07. The survey will be performed under conditions compatible with instrument operation and in daylight hours.

5.0 Develop a decision rule:

Null hypothesis: Residual licensed radioactive materials in Survey Unit 00L-05-07 exceeds the release criterion. Hypothesis testing is as follows:

(a) If all the sample data show that the soil concentrations of all plant-related nuclides are below the DCGL, reject the null hypothesis (i.e., Survey unit meets the release criteria).

(b) If any investigation level is exceeded, then perform an investigation.

(c) If the average concentration is below the DCGL, but individual measurements exceed the DCGL, then apply a statistical test to either accept or reject the null hypothesis.

(d) If the average concentration of any individual nuclide exceeds the DCGL or if the sum of fractions exceeds one, then accept the null hypothesis (i.e., Survey Unit 07 fails to meet the release criteria).

6.0 Specifv tolerable limits on decision errors:

Probability of type I error: 0.05 Probability of type II error: 0.05 LBGR: Unity12 = 0.5 7.0 Optimize Design:

Type of statistical test: WRS Test Sign Test Expected SPA-3 background: 8-13K cpm.

Basis including background reference location (if WRS test is specified): NIA Number of samples: Fifteen (1 5) random samples.

Fifteen (1 5) FSS random soil samples will be collected in randomly selected locations. This number has been chosen, based upon characterization data, using the process outlined in DP-8853.

Note:

~@s 004-F-S will be analyzed for ETD and HTD.

n addition, sample 00L-05 pat- 8tr&<,1q o~ FU-U Biased samples: A minimum of four (4) biased sample locations will be selected before, or at the time of sample collection and their locations will be added to the map, with the letter "B" added to the sample number.

The addition of these samples and the relocation of any samples may be added to the map without requiring a revision. The coordinates of the biased sample locations will be determined and added to the record.

DPF-8856.1 Page 4 of 6

GENERAL INSTRUCTIONS

1. Collect fifteen (1 5) 1 -liter FSS soil samples and four (4) biased 1-liter soil samples in accordance with DP-8120, using sampling equipment as stated in DP-8120. One (1) of the fifteen (1 5) FSS soil samples will be a QC split samples.

2. Soil sample designation:

(a) FSS soil samples: 00L-05-07-001-F through 00L-05-07-015-F corresponding to FSS sample locations 001 through 01 5.

00L-05-07-001 -F-H through 00L-05-07-015-F-H and 00L-05-07-016-F-B-H through 00L-05-07-019-F-B-H corresponding to the same nineteen (19) samples when analyzed off-site for tritium (H-3).

(b) Biased FSS soil sample: 00L-05-07-016-F-B through 00L-05-07-019-F-B.

(c) QC split sample: 00L-05-07-004-F-S. This sample will be analyzed for Hard-to-Detect (HTD) nuclides and H-3 in accordance with section 5.6.3.2.1 of the LTP and DP-8856.

(d) The off-site gamma spec will be compared with the on-site results in accordance with DP-8864.

(e) One (1) recount sample: 00L-05-07-002-F will be counted twice on site. The results will be compared in accordance with DP-8864.

3. All soil samples will be received and prepared in accordance with DP-8813, "Sample Receipt and Preparation."

4. Chain of Custody form will be used in accordance with DP-8123, "Sample Security and Chain of Custody" for all soil samples sent to an off-site laboratory.

5. The measurement locations have been identified using GPS, in accordance with DP-8859, "Operation of the Leica Geosystems GPS 1200 Global Positioning System for Identification of Final Status Survey Measurement Locations". In cases where the location cannot be determined directly using GPS, an offset will be used to describe the distance and bearing from a known GPS location or benchmark. Each location will be marked to assist in identifying the location. The FSS Radiological Engineer or FSS Field Supervisor will guide the FSS Technicians to the sample locations. Any locations that are not suitable for soil sampling will be relocated. A surplus of alternate random sample locations will be generated, the relocated sample location will be selected from the list of alternate sample locations in numeric order.

The alternate location will be documented in the field log in accordance with DP-8856, "Preparation of survey Plans."

6. Survey instrument: Operation of the E-600 w/SPA-3 will be in accordance with DP-8535, with QC checks performed in accordance with DP-8504. The instrument response checks shall be performed before issue and after use.

7. The job hazards associated with the FSS in Survey Unit 07 are addressed in the accompanying JHA for OOL-05-07.

8. All personnel participating in this survey shall be trained in accordance with DP-8868, "Final Status Survey Training Programs."

SPECIFIC INSTRUCTIONS

1. FSS Technicians will perform scans by moving the SPA-3 detector at a speed 5 0.5 mls, keeping the probe less than 3 inches from the surface, and following a serpentine pattern that includes at least 3 passes across each square meter. When scanning and walking, a slow pace shall be used. Scanning will be performed in the rate-meter mode with the audible feature on. Surveyors will listen for upscale readings, to which they will respond by slowing down or stopping the probe to distinguish between random fluctuations in the background DPF-8856.1 Page 5 of 6

and greater than background readings. Location(s) where detectable-above-background scan readings are found will be investigated.

A first level investigation may be done with the SPA-3lE-600 to determine if the observed increase in the scan measurement is due to the presence of rocks and boulders. S P A 3 scans performed in non-impacted areas have shown that rock formations accounted for increased count rates. If it can be demonstrated that the presence of rocks and boulders is the cause of an increased count rate during a SPA-3 scan, record that finding form DPF-8856.2. If it is demonstrated that the rocks and boulders do not account for an above background SPA-3 measurement, a soil sample will be collected at the point of the highest SPA-3 reading in the scanned area. Detailed descriptions of investigation actions will be recorded on form DPF-8856.2 and the location of the above background scan and sample will be recorded on the survey map. The location description must include sufficient detail to revisit the spot at a later time. If a soil sample is collected during the first level investigation, the sample designation will consist of the next available measurement location code plus the letter "I" (for investigation). For example, if a soil sample is collected during a first level investigation at measurement location 003, and the next available three digit sample location is 020 then the sample number would be 00L-05-07-020-F-I

2. All designated measurement locations have been already identified by GPS per DP-8859. If a designated sample location is obstructed for any reason, the FSS Radiological Engineer or the FSS Field Supervisor will select an alternate location in accordance with DP-8856. A detailed description of the alternate location will be recorded on form DPF-8856.2, survey unit map will be annotated appropriately, and the alternate location will be conspicuously marked to facilitate re-visiting to identify and record the coordinates with GPS in accordance with DP-8859.

1 3. All sample analysis will achieve the MDC values stated in the DQO section of this plan.

1 4. Soil Samples:

1 YNPS YNPS Chemistry will analyze all samples for gamma-emitting nuclides.

Chemistry will analyze 00L-05-07-002-F as a sample recount. The recounted sample will possess the naming convention 00L-05-07-002-F-RC.

1 Sample 00L-05-07-004-F-S will be analyzed for ETD and HTD.

5. On-site gamma analysis of the FSS samples shall achieve the MDC values stated in the DQO section of this plan. The MDC's will be communicated to the laboratory using an attachment to the Chain-of Custody form.

h I Prepared by 4 - - Date 3-f40b Reviewed by Date s'-v-Ob FS ~ d ~ l o g i cEngineer a l Approved b DPF-8856.1 Page 6 o f 6

Final Status Survey Planning Worksheet Page 1 of 5

~~GENERAL SECTION I Survey Area #: 00L-05 I Survey Unit #: 08 Survey Unit Name: Trans-Canada-Deerfield River Frontage - SW Region FSSP Number: YNPS-FSSP-00L05-08-01 REVISON CHANGES IN BOLD ITALICS PREPARATION FOR FSS ACTIVITIES Check marks in the boxes below signify affirmative responses and completion of the action.

1 1.I Files have been established for survey unit FSS records. El 1 1.2 ALARA review has been completed for the survey unit. El (YA-REPT-00-003-05) 1 1.3 The survey unit has been turned over for final status survey.

H1 1.4 An initial DP-8854 walkdown has been performed and a copy of the completed Survey Unit Walkdown Evaluation is in the survey area file.

1.5 Activities conducted within area since turnover for FSS have been reviewed. B

1) Based on reviewed information, subsequent walkdown: not warranted warranted If warranted, subsequent walkdown has been performed and documented per DP-8854.

OR The basis has been provided to and accepted by the FSS Project Manager for not performing a subsequent walkdown.

1.6 A final classification has been performed.

Classification: CLASS 1 CLASS 2 El CLASS 3 DATA OUALITY OBJECTIVES (DOO) 1.0 Statement of woblem:

Survey Unit 00L-05-08 is the southwest section of 00L-05, approximately 36,463 ft2(3388 m2) in size. The unit is a portion of the larger area of TransCanada-owned land that lies west of the industrial yard between the Yankee property and the Deerfield River. Due to the natural contour of the land, the unit receives run-off from an adjacent Class 1 survey unit (00L-05-09). For that reason, 00L-05-08 was established as a buffer zone for 00L-05-09 and has been classified as a Clasr 2 survey unit.

The data collected under this plan will be used to determine whether or not residual plant-related radioactivity in soil o Survey Unit 00L05-08 meet LTP release criteria.

T h e planning team for this effort consists of the FSS Project Manager, FSS Radiological Engineer, FSS Field Supervisor, an F S S Technicians. The FSS Radiological Engineer will make primary decisions with the concurrence of the FSS Projec 1 Manager.

2 . 0 Identifv the decision:

Does residual plant-related radioactivity, if present in the survey unit, exceed LTP release criteria? Alternative actions thl may be implemented in this effort are investigations and re-classification followed by re-surveying.

3.0 Identifv the inputs to the decision:

Sample media: soil

1) Types of measurements: soil samples and SPA-3 scans.

Radionuclide-of-concern: Cs- 137 Soil sample data presented in the HSA for area 00L-05 were used in the planning for 00L-05-08. The concentration of plant-related radionuclides in most of those samples was below the detection sensitivity. Cs-137 was the only significant plant-related nuclide (identified at 0.41 1 pCi/g in 1 sample, all other concentrations were <MDA). However, those data were collected prior to use of adjacent units as radioactive waste package staging areas. Composite samples of soil from the comers and wheels of the roll-offs that were staged in the adjacent units have identified both Co-60 and Cs-137.

DPF-8856.1 YNPS-FSSP-OOL05 Page 1 of 5

The HSA data were used to obtain an estimate of Cs-137 variability, which was used to determine the number of systematic soil samples required to support statistical. For added statistical power, 5 additional samples were added for a total number of 20 statistical soil samples.

Although the characterization data do not include analyses for hard-to-detect (HTD) nuclides such as H-3, Sr-90, and TRUs, these nuclides will be included in the assessment for Survey Unit 05. Two of the FSS soil samples will be sent to an independent laboratory for complete analyses (HTD nuclides and TRUs).

a. Soil Sarn~les:

For planning purposes, Cs-137 was selected as the radionuclide-of-concern for the unit. However, the presence of all LTP-listed radionuclides (gamma-emitters, HTD beta-emitters, and TRUs) in the soil will be evaluated under this survey plan. The YNPS Chemistry Dept. will analyze each soil sample for all LTP-listed gamma-emitting nuclides (excluding Am-241 and Cm-243). Two soil samples will be sent to an independent laboratory for analyses of gamma-emitters and HTD radionuclides (these analyses will include Am-241 and Cm-243).

Applicable DCGLs are presented in Table 1.: The DCGLs applied by this survey plan correspond to annual doses of 8.73 mremly (the 10-rnremiy DCGL adjusted for dose contributions from sub-surface concrete structures and tritium in ground water).

TABLE 1, Applicable DCGLs Nuclide DCGL (pCi/g) Nuclide DCCL (pCi/g) Nuclide DCCL (pCilg)

Average concentration: Cs-137 = 0.0292 pCi1g Standard deviation (0):Cs-137 = 0.086 pCi1g Investigation Level for soil samples: (a) >DCGL for Cs-137 (or any other detected LTP-listed nuclide), or (b) a sum of DCGL fractions >1 .O, or (c) a statistical outlier as defined in the LTP TABLE 2, MDCs for gamma analysis of soil samples Target MDC Target MDC Target MDC Nuclide (~ci/g) Nuclide (~cilg) Nuclide (pcilg)

Co-60 1.4E-1 1.1E+O Eu-1 52 3.5E-1 Nb-94 2.5E-1 CS-134 1.7E-1 Eu- 154 3.3E-1 Agl08m 2.5E-1 CS-137 3.OE-1 Eu- 155 1.4E+1 Note: If a target MDC value cannot be achieved in analysis, then a value no greater than 5X the listed value must be achieved in the analysis.

TABLE 3, MDCs for analyses of HTD nuclides Target MDC Target MDC Target MDC Nuclide (~cilg) Nuclide (~cilg) Nuclide (~cilg)

H-3 1.3Ei-I Sr-90 5.9E-2 Pu-24 1 3.4E+ 1 C-14 1.9E- 1 Tc-99 4.8E-1 Am-24 1 1.OE+O Fe-55 1.OE+3 Pu-23 8 Cm-2431244 1.1E+O Ni-63 2.8E+1 Pu-239/240 1.OE+O Note: If a target MDC value cannot be achieved in analysis, then a value no greater than 5X the listed value must be achieved in the analysis.

DPF-8856.1 Page 2 of 5

b. Scan Coveraze:

A minimum of 10% of the surface area (i.e. 2339 m2)within 00L-05-08 will be scan surveyed. Scan surveys will be biased to include: 1) the boundary shared with survey unit 00L-05-09; 2) likely drainage paths and collection points; and 3) as directed by either the cognizant FFS Radiological Engineer or Field Supervisor. Locations where scan surveys are performed shall be identified on a map and include background and observed instrument responses.. Documentation shall also include the dimensions of the area scanned so as to provide an estimate of the surface area covered. Increase coverage as necessary to ensure that at least 339 mZis scan surveyed.

Investigation Level for scan surveys: Instrument responses greater than background indication using an audible signal with headphones MDCR for SPA-3: Attachment 1 (2 pages) provides MDCR and MDC values by various background levels. Page 1 of Attachment 1 is applicable for a scan speed of 0.25 meters/second while page 2 addresses a scan speed of 0.1 meters/second.

MDC for in-situ gamma spectroscopy: MDC values for in-situ gamma spectroscopy are based on investigation levels applicable to Class 1 survey units. It has been determined (before-the-fact) that a count time of 10 minutes is sufficient to achieve the necessary detection sensitivity.

c. QC checks and measurements: QC checks for the SPA-3 will be performed in accordance with DP-8504. QC checks for the Leica GPS will be performed in accordance with DP-8859. Two QC split samples will be collected, and QC recounts for 2 soil samples will be performed by the YNPS Chemistry Lab.

4.0 Define the boundaries of the survev:

Boundaries of 00L05-08 are as shown on maps provided in the survey package. The survey will be performed under appropriate weather conditions (as defined by instrumentation limitations and human tolerance). Surveys may be performed on any shift of work.

5.0 Decision Rules:

Upon review of the FSS data collected under this survey plan:

(a) Ifall the sample data show that the soil concentrations of LTP-listed nuclides are below the 8.73 mremlyear DCGLs and the sum of fractions of LTP-listed nuclides are below unity, reject the null hypothesis (i.e., Survey Unit 00L-05-08 meets the release criteria).

(b) Ifthe investigation levels are exceeded, then perform an investigation survey.

(c) fthe average concentration of any LTP-listed nuclide exceeds its respective DCGL, or the average sum of fractions of LTP-listed nuclides exceeds unity, then accept the null hypothesis (i.e., Survey Unit 00L-05-08 fails to meet the release criteria).

Note: Alternate actions include investigations, reclassification, remediation and resurvey.

I 6.0 Specif? tolerable limits on decision errors:

Null hypothesis: Residual plant-related radioactivity in Survey Unit 00L05-08 exceeds the release criteria.

Probability of type I error: 0.05 1

Probability of type II error: 0.05 LBGR: 1.5 7.0 Optimize Design:

Type of statistical test: WRS Test C7 Sign Test Basis including background reference location (if WRS test is specified): NIA Number samples (per DP-8853): 15 + 5 additional = 20 Biased samples: 2 (Two)

This is Revision 01 to the original YNPS-FSSP-00L05-08. This revision provides guidance for determination of alternate sample locations for samples 00L-05-08-012-F, 00L-05-08-013-F and 00L-05-08-017-F. The physical locations of these samples are in a deep and unstable excavation. Site safety personnel determined there was no safe access to the sample locations or within 1 meter of the locations, therefore, they are considered not accessible for FSS. DP-8856 provides guidance for generating alternate sample locations. The guidance of DP-8856 is reflected in this revision. It is possible to obtain sample material from the original design locations of 00L-05-08-012-F and 00L-05-08-013-F using non-conventional means. Samplefrom these locations will be collected as biased samples.

DPF-8856.1 YNPS-FSSP-00L05-08-0 1 Page 3 of 5

GENERAL INSTRUCTIONS

1. Where possible, locations for the systematic soil samples will be identified using GPS in accordance with DP-8859. Each I location will be marked to assist in identifying the location. Any locations that are not suitable for soil sampling will be relocated to the nearest suitable location and documented in the field log in accordance with DP-8856.

112. Standing water must be removed prior to the collection of any FSS measurement in that area. 1 1 3. Soil samples shall be collected in accordance with DP-8120. 1

14. Chain of Custody forms shall be used in accordance with DP-8123 for all soil samples sent to an off-site laboratory.

1 5.

1 All soil samples shall be received and prepared in accordance with DP-8813. 1 I I m : Split samples to be sent to an off-site lab will not be dried prior to counting on site or shipping.

6. Survey instrument: Operation of the E-600 wlSPA-3 will be in accordance with DP-8535 with QC checks performed in 1I accordance with DP-8504. The instrument response checks shall be performed before issue and after use.

7. All SPA-3 scans will be performed with the audible feature activated. FSS Technicians will listen for upscale readings to which they will respond by slowing down or stopping the probe to distinguish between random fluctuations in the background and greater than background readings.

li 8. The job hazards associated with the survey described in this package are addressed in the accompanying Job Hazard Assessment (JHA) for 00L-05-08.

il All personnel participating in this survey shall be trained in accordance with DP-8868.

SPECIFIC INSTRUCTIONS 1I

1. All designated soil sample locations will be identified by GPS per DP-8859 or by use of reference points and tape measure as necessary. If a designated sample location is obstructed for any reason, the FSS ~ a d i o l o ~ i c a l ~ n ~ ior n ethe er FSS Field Supervisor will select an alternate location in accordance with DP-8856. A detailed description of the alternate location, if other than indicated below, will be recorded on form DPF-8856.2, the survey unit map will be annotated appropriately, and the alternate location will be conspicuously marked to facilitate re-visiting to identify and record the coordinates with GPS in accordance with DP-8859 or by measurement from a known reference point when GPS is not available.

a. Sample locations 00L-05-08-012-F, 00L-05-08-013-F and 00L-05-08-017-F are to be relocated using thefollowing:

I) As shown on map "Alternate Samples Location Map #I" identifl new locations for each sample starting with random location "a" and continuing alphabetically until an accessible location k determined. These random locations are within a box with dimensions of grid spacing "L" equal to approximately 14 meters.

2) If an accessible location cannot be determined as speccjied above then, as shown on map "Alternate Samples Location Map #217', identify new locations for each sample starting with random location "I" and continuing sequentially until accessible locations are determined. These random locations were generated across the entire survey unit.

Note: Indicate on form DPF-8856.2 and on the survey map which method was used to determine alternate locations and which random locations correspond to the chosen location. Map "FSS Samples" will be revised to show the actual location of samples.

1 2. Sample Requirements:

I Collect 22 (I-liter) soil samples in accordance with DP-8120 with exception as noted below in step 3. Two of the 20 soil samples will be analyzed as QC split samples to fulfill the QC requirement of DP-8852. The same QC split samples will also be analyzed for Hard-to-Detect nuclides in accordance with section 5.6.3.2.1 of the LTP and DP-8856.

3. Soil Sample Designations:

FSS soil samples: 00L-05-08-00 1-F through 00L-05-08-020-F corresponding to FSS sample QC split samples: L-05-08-0 16-F-S are to be designated as QC split samples. OC)~

DPF-8856.1 YNPS-FSSP-00L05-08-0 1 Page 4 of 5

Recount samples: 00L-05-08-004-F-RC and 00L-05-08-011 -F-RC are to be counted twice on site. The results will be compared in accordance with DP-8864.

Biased samples 00L-05-08-021-F-B through 00L-05-08-022-F-B are biased samples. These samples are to be obtained at the original design locations of 00L-05-08-012-F and 00L-05-08-013-F respectively. These samples will require non-conventional means for sample (e.g. use of earth moving equipment bucket).

Every effort should be made to collect only the lop 6" of soil.

I , 1

4. Sample Analysis:

Gamma analysis will be performed on all soil samples. If any of the gamma analyses show that an investigation level has been exceeded an investigation survey will be conducted under a revision to this survey plan.

YNPS Chemistry will analyze 00L-05-08-004-F and 00L-05-08-011-F as sample recounts. The recounted samples will be identified as 00L-05-08-004-F-RC and 00L-05-08-Ol l-F-RC, respectively.

On-site gamma analysis of the FSS samples shall achieve the MDC values stated in the DQO section of this plan.

The MDCs will be communicated to the labor t using an attachment to the Chain-of- Custody form.

/1rl~&b9 The off-site laboratory will analyze O O L - O ~ - O ~ ~and ~ F00L-05-08-016-F-S

-S for all LTP nuclides. Each sample will be prepared in accordance with DP-8813, "Sample Receipt and Preparation," but are not to be dried prior to shipment. Ensure that the lid of the container is secured and sealed with electrical tape to prevent loss of moisture during shipping.

5. Scan surveys may be performed with either a SPA-3 detector or in-situ gamma spectroscopy (ISOCS). A minimum of 10% of the surface area (i.e. 2339 m2) within 00L-05-08 will be scan surveyed. Scan surveys will be biased to include:

I) the boundary shared with survey unit 00L-05-09; 2) likely drainage paths and collection points; and 3) as directed by either the cognizant FFS Radiological Engineer or Field Supervisor. Ensure that standing water has been removed from the area being scanned. Locations where scan surveys are performed should be identified on a map. Increase coverage as necessary to ensure that at least 339 m2 is scan surveyed.

Scan surveys using a SPA-3 detector are to be performed with a probe speed of no greater than 0. l m/s (approximately 4 incheslsec). The SPA-3 scan speed will be observed by the FSS Field Supervisor and documented on DPF-8856.2.

Documentation should include the location and estimate of the area surveyed. If an investigation condition is encountered, a first level investigation may be conducted to determine if the observed increase above background levels in the scan measurement is due to the presence of rocks. SPA-3 scans performed in non-impacted areas have shown that rock formations accounted for increased count rates. If it can be demonstrated that the presence of rocks is the cause of an increased count rate during a SPA-3 scan, record that finding on form DPF-8856.2. If it is demonstrated that the rocks do not account for an above background instrument response, a soil sample will be collected at the point of the highest response in the area being scanned. Document detailed descriptions of investigatory actions on form DPF-8856.2. The location of the elevated response (and sample) will be recorded on a survey map. The location description must include sufficient detail to revisit the spot at a later time. If a soil sample is collected during the first level investigation, the sample designation will continue the soil sample numbering sequence plus the letter "I" (for investigation)

Scan surveys using in-situ gamma spectroscopy (ISOCS) are to be performed using either a 1-meter/l8O0 configuration or a 2-meter/90° configuration, applying a minimum spacing between scan survey locations of 4 meters or 3 meters respectively, ensuring that at least half of the applicable grid spacing is maintained at the boundaries of the survey unit.

For either configuration, investigation levels are associated with detectable plant-derived radioactive material. Operation of the in-situ gamma spectroscopy equipment shall be in accordance with DP-8871, with QC checks performed once per shift in accordance with DP-8869 and DP-8871 Ensure that the detector is positioned perpendicular to the surface being evaluated. Notify the cognizant engineer if unusual or problematic topography is encountered.

Date ,l&b Date ?47/0 6 r

Approved b DPF-8856.1 Page 5 of 5

Prospective Alternate Sample Locations for OOL-05-08-012-F,013-F, 017-F.

These samples were deemed inaccessible based on safety considerations. The samples could not be safely collected within l m of the original design location. In accordance with DP-8856, random locations are generated within a box of "L" dimensions centered over the original sample location.

= Sample Location Page 1 Page 1 Page 1 Page 1 Area: Area 1 X Coord Y Coord - Label Value TYpe Historical

.$ 271524.7896 3093569.1494 0 Random a) 271540.8199 3093565.6619 0 Random 3093548.7925 0 Random 271552.4289 3093537.7440 0 Random 4 271548.5036 3093544.4271 0 Random

$) 271548.6569 3093551.6286 0 Random 3093558.9617 0 Random 3093580.1826 0 Random 3093565.5480 0 Random i) 271530.8577 3093557.4823 0 Random

' I* I IYI il ii ~ r r r 8 t OOL-05-08-012 Prospective Alternate Sample Locat~ons Random locations within a box of "L" dimensions (L = 14m)

Area: Area I 0 Random 0 Random 0 Random 0 Random 0 Random 271585.3065 3093550.3609 271574.3611 3093581.4424

00L-05-08-013 Prospect~veAlternate Sample Locations Random locations within a box of "L" dimensions (L = 14m)

Area: Area 1 X Coord Y Coord Label Value Type Historical 4 271524.1741 3093626.5301 Random

6) 271555.3646 3093632.8642 Random 3093660.1360 Random 3093620.5410 Random 3093631.4626 Random F 271546.3649 3093651.7479 Random 271523.4905 3093654.3128 Random 3093645.2575 Random 3093634.1987 Random 271556.9112 3093657.4012 Random

00L-05-08-017 Prospective Alternate Sample Locations Random locations within a box of "L" dimensions (L = 14m)

o a - or-0s Area: Area 1 Label Value Type 0 Random 0 Random 0 Random 0 Random 0 Random

YNPS-FSSP-OOL-05-08-00 Attachment 1 (PAGE 1 )

1 _

SPA-3 Scan Tables Ydbe -'JIG .rr. ),/ ?'~<.t)i Max Background BKG(cpm) MDCR MDC(fDCGL) 4,000 639 1.13E+00

YNPS-FSSP-OOL-05-08-00 Attachment 1 ( PAGE 2)

SPAS Scan Tables ( , , r , r ~ , e -,i.-.- : '-;

Max Backaround V

BKG(cpm) MDCR MDC(fDCGL) 4,000 404 7.16E-01

To: 00L-05-08 File Date: September 7,2006 From: Greg Astrauckas

Subject:

Requested Enclosed are 2 soil samples packaged in 1-liter marinelli containers. Please perform radionuclide analyses as indicated below:

SAMPLE ID ANALYSIS REQUESTED 00L-05-03-009-F-S Gamma and HTD as shown below 00L-05-03-016-F-S Gamma and HTD as shown below Every attempt to should be made to achieve the target MDC listed below. In the event that the target MDC cannot be reasonably achieved, the required MDC must be achieved. Note the target MDC is at 10% of the applicable DCGL, and the required MDC is at 50% of the applicable DCGL,.

GAMMA-EMITTING NUCLIDES TARGET MDC REQUIRED MDC NUCLIDE (pCi/g) (pcilg) co60 1.4E-0 1 7.OE-01 HARD-TO-DETECT (HTD) NUCLIDES NUCLIDE TARGET MDC REQUIRED MDC Please email results to: astrauckas@yankeerowe.com

GENERAL SECTION Survey Area No.: 00L-05 Survey Unit No.: 09 Survey Unit Name: Alternate RW storage area in Radwaste FSSP NO.: YNPS-FSSP-00L-05-09-00 PREPARATION FOR FSS ACTIVITIES Check marks in the boxes below signify affirmative responses and completion of the action.

1.1 Files have been established for survey unit FSS records. X 1.2 ALARA review has been completed for the survey unit. X 1.3 The survey unit has been turned over for final status survey. X 1.4 An initial DP-5554 walk down has been performed and a copy of the completed Survey Unit Walk down Evaluation is in the survey area file. X 1.5 Activities conducted within area since turnover for FSS have been reviewed. X Based on reviewed information, subsequent walk down: X not warranted warranted If warranted, subsequent walk down has been performed and documented per DP-8854.

OR The basis has been provided to and accepted by the FSS Project Manager for not performing a subsequent walk down.

1.6 A final classitication has been performed. X Classification: Class I DATA QUALITY OBJECTIVES (DQO) 1.0 State the ~roblem:

Define the problem so that the focus of the survey will be unambiguous.

Members of the planning team: FSS Project manager, Radiological Engineer, Field Supervisor, and Technicians.

Primary decision rnaker/method: FSS Radiological Engineer with concurrence of the FSS Project Manager.

Available resotrrccs/deadliness NIA Concise descriplion ofproblem: Release of 00L-05-09 to demonstrate compliance with YNPS LTP release criterion.

2.0 Identify the decision:

Define the question that the survey will attempt to resolve and identify alternative actions that may be taken based on the outcome of the survey.

Principal study question: Is the residual radioactivity in 00L-05-09 below the 8.73 mr/yr release criterion?

Alternative actions: If residual radioactivity in 00L-05-09 exceeds the 8.73 mrlyr release criterion, investigations will be performed, potentially resulting in remediation, reclassification or resurveys.

Decision statement: Determine whether or not 00L-05-09 satisfies the 8.73 mrlyr release criterion.

3.0 Identifv the inputs to the decision:

Informational inputs needed to resolve the decision statement and environmental variables that will be measured.

Sources of information: 13 samples from historical data were sufficient to develop the DQOs for 00L-05-09.

20 new data measurements will be acquired to support DQAs.

Direct measurement technique: Soil samples will be collected and analyzed on site for all ETD LTP listed radionucluides, 2 samples will be sent to an independent lab for analyses of all LTP listed radionuclides.

Scan measurement technique: Surfaces will be scanned via a SPA-3 probe, andlor ISOCS Assays.

Sample matrix: Soil Radionuclide{s) o f concern: Based on a review of YNPS historical data, the following radionuclidcs are the only facility related radionuclides of concern: Cs- 137 Sample Quantity 15 (calculated) + 5 (added), for a total of 20 samples. (+2 QC)

Gridded Sample Area Size 83.1 m2 (Survey Unit Aream)

Sample Grid Spacing: Triangular: 9.8m DPF-8856.1 Page 1 of 5

Survey Area No.: 00L-05 Survey Unit No.: 09 Survey Unit Name: Alternate RW storage area in Radwaste FSSP NO.: YNPS-FSSP-00L-05-09-00 Detection Limits: For direct measurements and sample analyses, Minimum Detectable Concentrations (MDCs) less than 10% of the DCGL are prefered, while MDCs up to 50% of the DCGL are acceptable. See Attachment 2 for MDC Table.

MDC (jDCGLemc): The accompanying MDCRIMDC table in Attachment I provides MDC values, as a fraction of DCGLemc, for various background levels.

MDCR(surveyor): The accompanying MDCWMDC table in Attachment 1 provides MDCR values for various background levels.

Background Measurements: No reference area (background) measurements are required, the Sign Test will be used.

Release criteria DCGL based on: 8.73 mr/yr for Soil. See Attachment 2 for radionuclide specific breakdown of DCGLs.

4.0 Define the boundaries of the survey:

Define the spatial and temporal boundaries that will be covered by the decision statement so data can be easily interpreted.

Temporal boundaries: The data are used to reflect the condition of radionuclides leaching into the ground water over a period of 1,000 years. The survey may be performed under appropriate weather conditions (as defined by instrument tolerance and personnel safety) on any shift of work.

Spatial Boundaries: YNPS has been divided into multiple survey areas and units with relatively homogeneous characteristics based on information collected during the years of facility operation, the HSA, and post remediation activities. The area of interest has been named 00L-05, and the survey unit is 09. The medium of interest is described as Soil. The radiological characteristics of this unit classify it as a Class 1 area.

Which has 2,000 m2 as a surface area limit. The total surface area is 1662 m2, which is well within the 5 2,000 m2 limit. The maximum length is 88m, and the maximum width is 30.5m. Soil is surveyed to a depth of 15 cm.

See included GPS coordinates and maps that demonstrate the measurement locations, the survey unit boundaries and unit relationship to site.

Detailed description of unit: 00L-05-09 is an open land area located in the south western corner of the current Radwaste area owned by TransCanada. The Survey Unit is bordered by 00L-05-06 on the east, 00L-05-10 and 00L-05-08 on the south, 00L-05-08 on the west and north. Initial HSA classification of this Survey Unit identified a Class 3, however, subsequent activities and the relocation of an alternate Radwaste storage site prompted a reclassification of the unit to a Class 1 area. The Survey Unit is comprised of soils, small rocks and some turf. The terrain consists of level ground, slight grades and steep walled excavations.

5.0 Develor, a decision rule:

Define the parameter of interest, specify action levels, and the DCGL.

Investigation Levels: If an investigation level below is exceeded, then perform an investigation survey.

Direct measurements: > DCGLemc or > DCGLw + 3 Sigma Scan measurements: > DCGLemc or > Bkgd for SPA-3 Parameter of interest: If there are no investigation issues, and the the residual radioactivity in 00L-05-09 systematic samples is less than the DCGLw then the survey unit is in compliance with the release criterion (8.73 mr/yr).

Critical Value: If the average concentration is less than DCGLw, the sum of fractions is less than 1, and less than 6 of the 20 samples are above the DCGLw, the Survey Units passes. .

DPF-8856.1 Page 2 of 5

-Survey Area No.: 00L-05 Survey Unit No.: 09 Survey Unit Name: Alternate RW storage area in Radwaste FSSP NO.: YNPS-FSSP-00L-05-09-00 6.0 Specify limits on decision errors:

Specify the decision maker's limits on decision errors, used to establish performance goals for the data collection design.

Null Hypothesis (Ho): The residual radioactivity in the survey unit data is greater than the DCGLw Alternative Hypothesis (H ,): The residual radioactivity in the survey unit data is less than the DCGLw Tolerance for Error: Type I Error: 0.05 (probability of rejecting the null hypothesis when it is true.)

Type 11 Error: 0.05 (probability of accepting the null hypothesis when it is false.)

DCGLw: 3 (pciig)

LBGR: 2.8286 (Initial LBGR: 1.5)

Relative shift ( A h ) : 2 Sigma (D): 0.0857 Power of survey design: See attachment for prospective power curve.

7.0 Optimize Desi~n:

Type of statistical test: WRS Test Sign Test X (background will not be subtracted)

Design optimization is included in the DQO process, and reflected in the data published in this plan.

Number & Location ofsamples: 20 Soil samples will be collected at locations based on a random start, systematic Triangular grid (refer to accompanying DPF-8853.2). See map for specific locations.

GENERAL INSTRUCTIONS 1 Where possible, measurement locations will be identified using GPS in accordance with DP-8859. Each location will be marked to assist in identifying the location.

2 Soil samples will be collected in accordance with DP-8120.

3 Chain of Custody form will be used in accordance with DP-8123 for all soil samples sent to an off-site laboratory.

4 All soil samples will be received and prepared in accordance with DP-88 13. Note: Split samples to be sent to an off-site lab will not be dried prior to counting on site or shipping.

5 Survey instrument: Operation of the E-600 w/SPA-3 will be in accordance with DP-8535 with QC checks performed in accordance with DP-8504. The instrument response checks shall be performed before issue and after use.

6 All SPA-3 scans will be performed with the audible feature activated. Listen for upscale readings and respond by slowing down or stopping the probe to distinguish between random fluctuations in the background and greater than background readings. Investigate any reproducible upscale readings as described in the specific instructions.

7 The job hazards associated with the survey described in this package are addressed in the accompanying Job Hazard Assessment (JHA) for 00L-05-09.

8 All personnel participating in this survey shall be trained in accordance with DP-8868.

9 Collect ISOCS measurements in accordance with DP-8871 to provide 100% scan coverage of the survey unit.

SPECIFIC INSTRUCTIONS 1 SPA-3 Scans:

a Move the SPA-3 in rate-meter mode at a speed of 0.25m or less per second, keeping the probe at a distance of i 3" from the surface and following a serpentine path that includes at least 3 passes across each square meter. The maximum background a SPA-3 may be used in is 24000 cpm.

Perform supplimental/judgmental scans with SPA-3 in addition to ISOCS scans, as needed.

2 Scan Investigations:

If any of the ISOCS scan measurements show that an investigation level has been exceeded an investigation survey will be conducted of that ISOCS scan location as directed by the radiological engineer. Note: Detailed descriptions of investigation b

actions shall be recorded in the daily survey journal (DPF-8856.2) and locations marked on a map.

• DPF-8856.1 Page 3 of 5

'survey Area No.: 00L-05 Survey Unit No.: 09 Survey Unit Name: Alternate RW storage area in Radwaste FSSP NO.: YNPS-FSSP-00L-05-09-00 3 Sample Locations:

All designated measurement locations will be identified by GPS per DP-8859 or by use of reference points, tape measure and compass as necessary. If a designated sample location is obstructed for any reason, the FSS Radiological Engineer or the FSS Field Supervisor will select an alternate location in accordance with DP-8856. A detailed description of the alternate location will be recorded on form DPF-8856.2, the survey unit map will be annotated appropriately, and the alternate location will be conspicuously marked to facilitate re-visiting to identify and record the coordinates with GPS in accordance with DP-8859 or by measurement from a known reference point when a GPS is not available.

4 Sample Requirements: Collect 20 samples in accordance with DP-8 120. Document sample collection date, time and sample collector on DPF-8856.2 for each sample collected.

2 of the 20 samples collected will be analyzed as QC split samples to hlfill the QC requirement of DP-8852. The same QC split samples will be analyzed for HTD nuclides in accordance with section 5.6.3.2.1 of the LTP and DP-8856.

Biased samples: No biased samples will be collected.

5 Sample Designation:

FSS soil samples: 00L-05-09-001-F through 00L-05-09-020-F corresponding to FSS sample locations 00 1 through 020.

Biased soil samples: No biased samples will be collected.

QC split samples: 00L-05-09-007-F-S and 00L-05-09-013-F-S are to be designated as QC split samples. These samples will be sent to the off-site laboratory (do not dry).

Recount samples: 00L-05-09-006-F-RC will be counted twice on site. The results will be compared in accordance with DP-8864.

6 Sample Analysis:

Gamma analysis will be performed on all soil samples. If any of the gamma analyses show that an investigation level has been exceeded an investigation survey will be conducted at that sample location as directed by the radiological engineer.

YNPS Chemistry will analyze 00L-05-09-001 -F through 00L-05-09-020-F for gamma-emitting nuclides.

YNPS Chemistry will analyze 00L-05-09-006-F as a sample recount. The recounted sample will possess the naming convention 00L-05-09-006-F-RC.

YNPS Chemistry will analyze 00L-05-09-007-F-S and 00L-05-09-013-F-S for gamma-emitting nuclides prior to being sent to the off-site laboratory. These samples will be analyzed for gamma-emitting nuclides and HTD at the off-site All gamma analysis of the FSS samples shall achieve the MDC values stated in the DQO section of this plan. The MDC's will be communicated to the laboratory using an attachment to the Chain-of- Custody form.

7 ISOCS Assays:

Collect at least 44 ISOCS measurements in accordance with DP-8871 to provide 100% scan coverage of the survey unit.

ISOCS assays are designated as 00L-05-09-xxx -F-G where "xxx" starts at 101 and continues sequentially.

QC checks shall be performed at least once per shift in accordance with DP-8869 and DP-887 1. Resolve flags encountered prior to survey.

ISOCS assays to be performed with 1 SO0 collimator at lm unless otherwise directed by the FSS Engineer. Make note on the daily survey journal (DPF-8856.2) if other geometries are used.

For ISOCS assay locations shown on map titles "ISOCS Scans", position the detector downward facing keeping the detector perpendicular to the ground.

Designate additional assay locations in continuing sequence from the last number assigned to an FSS ISOCS measurement i

to ensure 100% scan coverage. Record detailed information about additional assay locations on the daily survey journal. "

DPF-8856.1 Page 4 of 5

Survey Area No.: 00L-05 Survey Unit NO.: 09 Survey Unit Name: Alternate RW storage area in Radwaste FSSP NO.: YNPS-FSSP-00L-05-09-00 I Remove standing water prior to performance of ISOCS assays. Contact the FSS Engineer for directions if conditions are such that standing water cannot be removed.

J Prepared by Ron Shippee .@&o/l~dAR, , .

Date September 6,2006 FSS ~ a d i o l o ~ i ~

c dn d h ~ e ?

Reviewed by Date f

DPF-8856.1 Page 5 of 5

YNPS-FSSP-OOL-05-09-00 Attachment 1 SPA-3 Scan Tables Max Background Scan Speed B K G b m ) I MDCR I MDC(fDCGLemc\ 1 IInISec I m1Sec I BKG (cpm) 1

Y NPS-FSSP-OOL-05-09-00 Attachment 2 DCGL MDC Table

GENERAL SECTION Survey Area No.: 00L-05 Survey Unit No.: 10 Survey Unit Name: Radwaste Roadway FSSP NO.: YNPS-FSSP-00L-05-10-00 PREPARATION FOR FSS ACTIVITIES Check marks in the boxes below signify affirmative responses and completion of the action.

1. I Files have been established for survey unit FSS records. X 1.2 ALARA review has been completed for the survey unit. X 1.3 The survey unit has been turned over for final status survey. X 1.4 An initial DP-5554 walk down has been performed and a copy of the completed Survey Unit Walk down Evaluation is in the survey area file. X 1.5 Activities conducted within area since turnover for FSS have been reviewed. X Based on reviewed information, subsequent walk down: X not warranted warranted If warranted, subsequent walk down has been performed and documented per DP-8854.

OR The basis has been provided to and accepted by the FSS Project Manager for not performing a subsequent walk down.

1.6 A final classification has been performed. X Classification: Class I DATA QUALITY OBJECTIVES (DQO) 1.0 State the ~roblem:

Define the problem so that the focus of the survey will be unambiguous.

Members of the planning team: FSS Project manager, Radiological Engineer, Field Supervisor, and Technicians.

Primary decision muker/method: FSS Radiological Engineer with concurrence of the FSS Project Manager.

Avuilable resources/deadlines: NIA Concise description ofproblem: Release of 00L-05-10 to demonstrate compliance with YNPS LTP release criterion.

2.0 ldentifv the decision:

Define the question that the survey will attempt to resoIve and identify alternative actions that may be taken based on the outcome of the survey.

Principal study question: Is the residual radioactivity in 00L-05-10 below the 8.73 mrlyr release criterion?

Alternative actions: If residual radioactivity in 00L-05-10 exceeds the 8.73 mrlyr release criterion, investigations will be performed, potentially resulting in remediation, reclassification or resurveys.

Decision statement. Determine whether or not 00L-05-10 satisfies the 8.73 rnrlyr release criterion.

3.0 Identify the inputs to the decision:

Informational inputs needed to resolve the decision statement and environmental variables that will be measured.

Sources of information: 13 samples from historical data was sufficient to develop the DQOs for 00L-05-10.

18 new data measurements will be acquired to support DQAs.

Direct measurement technique. Soil samples will be collected and analyzed on site for all ETD LTP listed radionucluides, I sample will be sent to an independent lab for analyses of all LTP Iisted radionuclides.

Scan measurement technique: Surfaces will be scanned via a SPA-3 probe, and/or ISOCS Assays.

Sample matrix: Soil radio nuclide(^) ofconcern: Based on a review of YNPS historical data, the following radionuclides are the only faciIity related radionuclides of concern: Cs-137 Sample Quantity 15 (calculated) + 3 (added), for a total of 18 samples. (+1 QC)

Gridded Sample Area Size 54.17 m2 (Survey Unit Aream)

J Sample Grid Spacing: Triangular: 7.9m DPF-8856.1 Page 1 of 5

w Survey Area No.: 00L-05 Survey Unit No.: 10 Survey Unit Name: Radwaste Roadway FSSP NO.: YNPS-FSSP-00L-05-10-00 Detection Limits: For direct measurements and sample analyses, Minimum Detectable Concentrations (MDCs) less than 10% of the DCGL are prefered, while MDCs up to 50% of the DCGL are acceptable. See Attachment 2 for MDC Table.

MDC WCGLemc): The accompanying MDCRJMDC table in Attachment 1 provides MDC values, as a fraction of DCGLemc, for various background levels.

MDCR(surveyor): The accompanying MDCRIMDC table in Attachment 1 provides MDCR values for various background levels.

Background Measurements: No reference area (background) measurements are required, the Sign Test will be used.

Release criteria DCGL based on: 8.73 mrlyr for Soil. See Attachment 2 for radionuclide specific breakdown of DCGLs.

4.0 Define the boundaries of the survey:

Define the spatial and temporal boundaries that will be covered by the decision statement so data can be easily interpreted.

Temporal boundaries: The data are used to reflect the condition of radionuclides leaching into the ground water over a period of 1,000 years. The survey may be performed under appropriate weather conditions (as defined by instrument tolerance and personnel safety) on any shifi of work.

Spatial Boundaries.. YNPS has been divided into multiple survey areas and units with relatively homogeneous characteristics based on information collected during the years of facility operation, the HSA, and post remediation activities. The area of interest has been named 00L-05, and the survey unit is 10. The medium of interest is described as Soil. The radiological characteristics of this unit classify it as a Class 1 area.

Which has 5 2,000 m2 as a surface area limit. The total surface area is 975 m2, which is well within the 5 2,000 m2 limit. The maximum length is 165.4m, and the maximum width is 8.1m. Soil is surveyed to a depth of 15 cm.

See included GPS coordinates and maps that demonstrate the measurement locations, the survey unit boundaries and unit relationship to site.

Detailed description of unit: 00L-05-10 is an asphalt roadway located in the Radwaste area on property owned by TransCanada. The roadway runs approximately east to west and is bordered on the north, east and west by units 00L-05-08,OOL-05-06 and 00L-05-05. Survey units 00L-06-02 and 00L-06-03 form the southern border, Initial classification of this survey unit was Class 3, however, during demolition the roadway has been used as a staging area for rolloffs and intermodals containing radioactive material awaiting shipment. Since, in effect, the unit was used as a radwaste storage area, the decision was made to reclassify this unit to a Class 1 area. 00L-05-10 is comprised almost entirely of asphalt and has a total area of 975 square meters.

5.0 Develor, a decision rule:

Define the parameter of interest, specify action levels, and the DCGL.

Investigation Levels: If an investigation level below is exceeded, then perform an investigation survey.

Direct measurements: > DCGLemc or > DCGLw + 3 Sigma Scan measurements: > DCGLemc Parameter of interest: If there are no investigation issues, and the the residual radioactivity in 00L-05-10 systematic samples is less than the DCGLw then the survey unit is in compliance with the release criterion (8.73 mr/yr).

Critical Value: If the average concentration is less than DCGLw, the sum of fractions is less than 1, i

and less than 5 of the 18 samples are above the DCGLw, the Survey Units passes. i DPF-8856.1 Page 2 of 5

.Survey Area No.: 00L-05 Survey Unit No.: 10 Survey Unit Name: Radwaste Roadway FSSP NO.: YNPS-FSSP-00L 10-00 6.0 S ~ e c i f vlimits on decision errors:

Specify the decision maker's limits on decision errors, used to establish performance goals for the data collection design.

Null Hypothesis (H,): The residual radioactivity in the survey unit data is greater than the DCGLw Alternative Hypothesis (H,). The residual radioactivity in the survey unit data is less than the DCGLw Tolerancefor Error: Type I Error: 0.05 (probability of rejecting the null hypothesis when it is true.)

Type 11 Error: 0.05 (probability of accepting the null hypothesis when it is false.)

DCGLw: 3 (~ci/g)

LBGRr 2.8286 (Initial LBGR: 1.5)

Relative shift (Ah): 2 Sigma (o): 0.0857 Power of survey design: See attachment for prospective power curve.

7.0 Optimize Design:

Type of statistical test: WRS Test Sign Test X (background will not be subtracted)

Design optimization is included in the DQO process, and reflected in the data published in this plan.

Number & Location of Samples: 18 Soil samples will be collected at locations based on a random start, systematic Triangular grid (refer to accompanying DPF-8853.2). See map for specific locations.

GENERAL INSTRUCTIONS 1 Where possible, measurement locations will be identified using GPS in accordance with DP-8859. Each location will be marked to assist in identifying the location.

2 Soil samples will be collected in accordance with DP-8120.

3 Chain of Custody form will be used in accordance with DP-8 123 for all soil samples sent to an off-site laboratory.

4 All soil samples will be received and prepared in accordance with DP-8813. Note: Split samples to be sent to an off-site lab will not be dried prior to counting on site or shipping.

5 Survey instrument: Operation of the E-600 w/SPA-3 will be in accordance with DP-8535 with QC checks performed in accordance with DP-8504. The instrument response checks shall be performed before issue and after use.

6 All SPA-3 scans will be performed with the audible feature activated. Listen for upscale readings and respond by slowing down or stopping the probe to distinguish between random fluctuations in the background and greater than background readings. Investigate any reproducible upscale readings as described in the specific instructions.

7 The job hazards associated with the survey described in this package are addressed in the accompanying Job Hazard Assessment (JHA) for 00L 10.

8 All personnel participating in this survey shall be trained in accordance with DP-8868.

9 Collect ISOCS measurements in accordance with DP-887 1 to provide 100% scan coverage of the survey unit.

SPECIFIC INSTRUCTIONS I SPA-3 Scans:

Move the SPA-3 in rate-meter mode at a speed of 0.25m or less per second, keeping the probe at a distance of < 3" fiom the surface and following a serpentine path that includes at least 3 passes across each square meter. The maximum background a SPA-3 may be used in is 26000 cpm.

Perform supplimentaWjudgmental scans with SPA-3 in addition to ISOCS scans, as needed.

2 Scan Investigations:

Note: Detailed descriptions of investigation actions shall be recorded in the daily survey journal (DPF-8856.2) and locations marked on a map.

Scan a lm radius footprint around the investigation location in accordance with the scan requirements above. The area of scan should be increased as necessary to bound any areas of elevated activity identified. Perform a sample investigation as

• noted below.

DPF-8856.1 Page 3 of 5

Survey Area No.: 00L-05 Survey Unit No.: 10 Survey Unit Name: Radwaste Roadway FSSP NO.: YNPS-FSSP-00L 10-00 3 Sample Locations:

All designated measurement locations will be identified by GPS per DP-8859 or by use of reference points, tape measure and compass as necessary. If a designated sample location is obstructed for any reason, the FSS Radiological Engineer or the FSS Field Supervisor will select an alternate location in accordance with DP-8856. A detailed description of the alternate location will be recorded on form DPF-8856.2, the survey unit map will be annotated appropriately, and the alternate location will be conspicuously marked to facilitate re-visiting to identify and record the coordinates with GPS in accordance with DP-8859 or by measurement from a known reference point when a GPS is not available.

4 Sample Requirements: Collect 18 samples in accordance with DP-8120. 1 of the 18 samples will be analyzed as a QC split sample to fulfill the QC requirement of DP-8852. The same QC split sample will be analyzed for HTD nuclides in accordance with section 5.6.3.2.1 of the LTP and DP-8856." If a sample point falls on asphalt, then a sample will be drawn for both the asphalt and the soil below.

Biased samples: No biased samples will be collected.

5 Sample Designation:

FSS soil samples: 00L 10-001 -F through 00L-05-10-0 18-F corresponding to FSS sample locations 001 through 018."Asphalt samples will have an A after the F Biased soil samples: No biased samples will be collected.

QC split samples: 00L-05-10-006-F-S is to be designated as QC split sample. This sample will be sent to the off-site laboratory (do not dry).

Recount samples: 00L-05-10-005-F-RC will be counted twice on site. The results will be compared in accordance with DP-8864.

6 Sample Analysis:

Gamma analysis will be performed on all soil samples. If any of the gamma analyses show that an investigation level has been exceeded an investigation survey will be conducted at that sample location as directed by the radiological engineer.

YNPS Chemistry will analyze 00L-05-10-001-F through 00L-05-10-018-F for gamma-emitting nuclides.

YNPS Chemistry will analyze 00L-05-10-005-F as a sample recount. The recounted sample will possess the naming convention 00L 10-005-F-RC.

YNPS Chemistry will analyze 00L 10-006-F-S for gamma-emitting nuclides prior to being sent to the off-site laboratory. These samples will be analyzed for gamma-emitting nuclides and HTD at the off-site laboratory.

All gamma analysis of the FSS samples shall achieve the MDC values stated in the DQO section of this plan. The MDC's will be communicated to the laboratory using an attachment to the Chain-of- Custody form.

7 ISOCS Assays:

Collect at least 26 lSOCS measurements, if lSOCS is used for scanning, in accordance with DP-8871 to provide 100% scan coverage of the survey unit.

ISOCS assays are designated as 00L-05-10-xxx -F-G where "xxx" continues sequentially from the last number assigned to an FSS measurement.

QC checks shall be performed at least once per shift in accordance with DP-8869 and DP-8871. Resolve flags encountered prior to survey.

ISOCS assays to be performed with 180' collimator at Im unless otherwise directed by the FSS Engineer. Make note on the daily survey journal (DPF-8856.2) if other geometries are used.

For ISOCS assay locations shown on map titles "ISOCS Scans", position the detector downward facing keeping the detector perpendicular to the ground.

Designate additional assay locations in continuing sequence from the last number assigned to an FSS measurement. Record detailed information about additional assay locations on the daily survey journal.

DPF-8856.1 Page 4 of 5

Survey Area No.: 00L-05 Survey Unit No.: 10 Survey Unit Name: Radwaste Roadway FSSP NO.: Y NPS-FSSP-00L 10-00 Remove standing water prior to performance of ISOCS assays. Contact the FSS Engineer for directions if conditions are such that standing water cannot be removed.

If the results on any ISOCS assay exceed an investigation level, investigate the area within the field of view (7m diameter, 38.5 m2 area) for that assay.

Note: Detailed information pertaining to additional assay locations will be provided on the Daily Survey Journal.

Prepared by Date September 8,2006 Reviewed by Date q!%\a~

Approved by Martin Erickson b / &;oh Date September 8, 2006 FSS ~roje'ct~ a n a s /

r DPF-8856.1 Page 5 of 5

YNPS-FSSP-00L-05-10-00 Attachment 1 SPA-3 Scan Tables Max Backaround Scan S ~ e e d BKG(cpm) MDCR MDC(fDCGLemc) 4.000 639 3.91E-01

YNPS-FSSP-OOL-05-10-00 Attachment 2 DCGL MDC Table