ML20205C076
| ML20205C076 | |
| Person / Time | |
|---|---|
| Site: | 07003085 |
| Issue date: | 03/15/1999 |
| From: | Orland0 D NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| To: | Rosenthal P AFFILIATION NOT ASSIGNED |
| References | |
| TAC-L51207, NUDOCS 9904010070 | |
| Download: ML20205C076 (2) | |
Text
I
.o l March 15, 1999 Mr. Philip Rosenthal, Senior Project Mananer BW)( Technologies, Inc.
P.O. Box 11165 Lynchburg, VA 24506-1165 j
SUBJECT:
N3C STAFF'r1EVIEW OF THE 1999 FIELD PROGRAM WORKPLAN FOR THE PARKS SHALLOW LAND DISPOSAL AREA (TAC L51207)
Dear Mr. Rosenthal:
I am responding to your letter, dated February 26,1999, which forwarded the 1999 Field Program Workplan for the Parks Shallow Land Disposal Area to Nuclear Regulatory Commission (NRC) staff for review. I have performed a non-technical review of the workplan and do not have any comments. However, please note that, when the results of the 1999 fisid woik is completed, and the results are forwarded to NRC staff, either as part of the decommissioning plan or via an alternative document, the NRC staff may have questions or comments on how the results were developed. Staff of the Pennsylvania Department of l Environmental Protection (PADEP) have indicated to NRC staff that they intend to perform a technical review of the workplan in the near future. Please forward a copy your responses to PADEPs comments on the workplan to me when they are sent to PADEP.
If you have any questions concerning the review of the workplan, please contact me at (301) 415-6749.
Sincerely,
[0riginal signed by:]
Dominick A. Orlando, Project Manager Low-Level Waste and Regulatory
' Issues Section Low-Level Waste and Decommissioning Projects Branch //
Division of Waste Management I Office of Nuclear Material Safety and Safeguards ,
License No. 'di4M-2001 1 Docket No. 70-3085 cc: SLDA Distribution List
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Ticktt #:NA j DISTRIBUTION: - Central File LLDP r/l DWM r/f NMSS r/l RJohnson PUBLIC SGagner TMadden TJackson,RI TDimitriatis, RI RBellamy, RI
- See previous concurrence
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' DOCUMENT NAME: SADWM%lepP\DAO\SLDA99WP.WPD m i
> lON LLDP* / Lb* LLDP* Dh* N NAME DOrlando \M '
JCopeland RNelson kckey DATE 3/12 /99 ' 3/15 /99 3/15 /99 3/15 /99 OFFICIAL RECORD COPY LSS: YES _ NO _X_ !
ACNW: YES _ NO _X_ j
-IG: YES _X_ NO _ Delete file after distribution YES _ NO _
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) Mr. Philip Rosenthat, Senior Project Manager BWX Technologies, Inc. '
P.'O. Box 1'1165 Lynchburg, VA 24506-1165
SUBJECT:
/
NRC STAFF REVIEW OF THE 1999 FIELD PROGRAM WORKPLAN FOR THE PARKS SHALLOW LAND DISPOSAL AREA (TAC L51207)
Dear Mr. Rosenthal:
/
l am responding to your letter, dated February 26,1999, which forwarded th 1999 Field Program Workplan for the Parks Shallow Land Disposal Area to Nuclear Regulatory Commission (NRC) staff for review. I have performed a non-technical review of the workplan and do not have any comments. However, please note that, when the results of the 1999 field work is completed, and the results are forwarded to NRC staff, either as part of the decommissioning plan or via an alternative document, the NRC staff may have questions or comments on how the results were developed.
/
If you have any questions conceming the review of the workplan, please contact me at (301)415-6749.
Sincerely',
/
kO dominick A. Orlando, Project Manager
/ Low-Level Waste and Regulatory
/ Issues Section
/ Low-Level Waste and Decommissioning
/
/ Projects Branch Division of Waste Management
! Office of Nuclear Material Safety and Safeguards License No. SNM-2001 Docket No. 70-3085 '
cc: SLDA Distribution t Tick;t #:NA DISTRIBUTION:
/
Central File LLDP r/f DWM r/f NMSS r/f RJohnson PUBLIC SGagner TMadden TJackson, RI TDimitriatis, Rl RBellamy, RI ,
DOCUMENT NAME: S:\DWM\LLDP\DAO\SLDA90wp.wpd OFC LLDP/ / _ LLDF7 / / LLhk 11 W N NAME DOrfando JCohan RN son ey DATE /3/[z /99 3/ / [/99 3/ l$ /99 3//[/99 OFFICIAL RECORD COPY
/ S:
ACNW:
YES YES NO NO X
_,,X_
1
1 BWX Technologies, Inc. l Babcock & Wdcox. a McDermott company B&W Services, Inc. '
PO Box 11165 Lynchburg. VA 245061105 (804)5.2 6000 February 26.1999 ,
R99-045 Mr. Dominick A. Orlando. Project Manager 1.ow Level Waste and Decommissioning License SNM-2001 Projects 13 ranch MC-T8F37 Docket No. 70-3085 Division of Waste Management IJ.S. Nuclear Regulatory Commission Washington. D.C. 20555 RE: Parks Shallow I and Disnosal Area (SI.DA) 1999 Field Program Work Plan
Dear Mr. Orlando:
Enclosed please find a copy of the Parks St.DA 1999 Field Program Work Plan. During our meeting of December 2,199813WXT and ARCO agreed to provide the NRC staff with a copy of the subject document for comment. If your comments are to be useful they must be received by me no later than \1 arch 15.1999. Your cooperation is appreciated.
If you have any questions concerning the enclosed, please do not hesitate to contact me.
Sincerely, G j $ kn a. .if, Philip R tosenthal Senior Project Manager
Enclosure:
Parks Shallow Land Disposal Area 1999 Field Program Work Plan, dated February 1999 cc:
T. J. Jackson - NRC Region I w/ encl.
J.J. Matviya - PA DEP wiencl. under separate cover R.J. Ilullock - ARCO w o/ encl.
., g a( i# g-- nC? -
1 PARKS Shallow Land Disposal Area 1999 Field Program Work Plan Date issued: February 1999
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TABLE OF CONTENTS 10 WORK PLAN OVERVIEW 1
1.1 INTRODUCTION
1
1.2 BACKGROUND
1 1.3 ORGANIZATION OF THIS WORK PLAN 1 1.4 POSSIBLE CHANGES TO THIS PLAN 1 2.0 OBJECTIVES 2
3.0 DESCRIPTION
OF THE FIELD ACTIVITIES 3 3.1 TEMPORARY PIEZOMETERS 3 3.1.1 Overview 3 3.1.2 Locations 3 3.1.3 Installation 3 3.2 GEOCHEMICAL TESTING 4 40 DATA ANALYSIS 6 50 HEALTH AND SAFETY PROCEDURES 7
TABLES Table i Summary of Proposed Piezameter and Staff Gauges (
)
Table 2 Proposed Locations for in-situ Eh and pH Measurements
{
FIGURES i Figure 1 Proposed Locations
e
! 1.0 WORK PLAN OVERVIEW
1.1 INTRODUCTION
This is a Work Plan for the 1999 6 eld data collection at the Parks Shallow Land Disposal Area (SLDA)in Armstrong County, Pe .*yhama.
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1.2 BACKGROUND
l The 6 eld work etTort is to be undertaken to proside data needed for the evaluation of remediation alternatises. The data will be utilized to refine the range of potential groundwater exposure scenarios used to calculate potential future dose.
1.3 ORGANIZATION OF THIS WORK PLAN The tasks presented in the following sections are organized into units based on technique.
location, schedule, or logistical considerations.
1.4 POSSIBLE CHANGES TO THIS PLAN Because the actual conditions encountered during ths field effort may vary from those anticipated, this Work Plan is intended as a guide for the data collection etTort. In addition to specifying the planned approach this Work Plan prosides the data objectives. This will allow the field personnel to modify the approach so that the objectives are met, esen if unanticipated conditions are encountered. All changes or modifications to the program will be documented and contained in the report of results.
All werk will be conducted under the control of B&W Sersices. Inc. (BWSI). All work will be 1 done under BWSI standard operating procedures for technical activities and the Site llealth and Safety Plan. All work will be subject to standard BWSI procedures for quality control and quality assurance.
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2.0 OBJECTIVES The primary objectise for the proposed 1999 data =llection etTort is to obtain the data needed to perform a fate and transport analysis. The specific information is needed to further define the groundwater flow paths. bydraulic characteristics, and geochemical conditions downgradient from the upper trenches.
Specific objectives include:
. Determining the direcuan of groundwater flow between Dry Run ar;d the soil zone at various locations along the section north of the upper trenches:
. Determining the direction of groundwater flow in the first shallow bedrock zone (FSB) below and north of Dry Run:
- Characterizing the geochemical conditions in the s arious hydrogeologic units dow ngradient of the upper trenches; and
. Evaluating the hydraulic conditions in the vicinity of existing well MW-42.
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3.0 DESCRIPTION
OF THE FIELD ACTIVITIES 3.1 TEMPORARY PIEZOMETERS 3.1.1 Overview A total of eight temporary piezometers (TPZ) are proposed (three in the overburden above the top of bedrock and five in the first shallow bedrock zone) to evaluate the groundwater flow paths. In addition, four staff gauges will be installed in Dry Run adjacent to TPZ locations to evaluate the groundwate flow direction between Dry Run and the adjacent soil zone or bedrock. Table i provides the estimated depth and target zone for each piezometer.
Most zones in the soil and bedrock at the SLDA site bas e low porosity and low permeability. A large diameter well will lag in responding to hydraulic head changes in the fonr.ation due to the storage capacity of the well. Therefore, the TPlf s are intended to be as small in diameter as practical. Six of the TPZ's will be constructed of 1. inch ID porous polyethylene t'ips and Winch ID PVC riser pipe. The two TP7/s scheduled for in-situ oxidation / reduction measurements (PZO4 and PZOS) will he constructed of 3 inch ID PVC screen and riser pipe. Because the TPZ's will be used only for water level and in-situ measurements, a protective steel casing and concrete pad will not be required. They will be completed at 'he surface with grout and a secure cap on the PVC riser. Detailed construction specifications for the piezameters are provided in Section 3.1.1 An experienced geologist uill log the cuttings of materials encountered during drilling operations to determine the appropriate depth for completion. Table I provides an estimate of the completion depth and screened zone for each piezometer. Because the estimates are believed to be reasonably close to the actual depths, cuttings will be sufticient to determine the completion depth and target zone for each TPZ. It will not be necessary to collect split-spoon or core samples other than those scheduled for geochemical testing (Table 1) 3.1.2 Locations The proposed locations for the temporary piezometers and staff gauges are intended to provide the characterization iniormation necessary to perform fate and transport analysis and are shown on Figure 1. The locations were selected to provide corrmlete coverage of the downgradient groundwater tiow paths from tne trenches.
3.1.3 Installation Temporarv Plezometers The TPZ's installed in the soil zone will be constructed by drilling to the top of bedrock using the hollow stem auger method. The maximum auger size will be 6-inch OD (4.5-inch OD is preferred). The soil piezometers will consist of a I foot long piezometer tip and %-inch ID riser pipe. The i.p vill be set at the bottom of the boring (top of rock) and sand will be placed in the annular space to the top of the target zone elevation specified in Table 1. A l-foot thick bentonite seal will be placed above the sand and the remaining annular space wn! be tremie grouted to the surface. A secured vented cap will be placed on the top of the riser pipe.
The bedrock TPZ's will be installed by first drilling with augers to the top of bedrock. A aeel casing will be placed in the auger boring and set into the top of becack. The casing v21 then be 3
.e tremie grouted in place to isolate groundwater m the soil zone from the bedrock. The he'drock' will then be drilled using either air-rotarv or air-percussion methods to the appropriate depth. The boring in rock will be between 4- and 6-inches ID. The projected depths for each TPZ are provided in Table 1. Where specified in fable 1. >amples will be obtained for geochemical testing.
Six of the TPZ's will co'sist of a 1-inch ID by 1.0 ori.5-foot long piezometer tip and Linch ID PVC riser pipe. The two IPZ's scheduled for in. situ testing (TPZO4 and TPZO5) will be constructed using 2-inch ID by 10 foot long 0.010-inch slotted, PVC screen and a 2 inch ID tlush joint PVC riser pipe. The length of the screened section will be adjusted to accommodate the actual depth and thickness of the target formation if different than estimated in Table 1.
Staff Gauaes fhe staff gauges will consist of ': to I-inch diameter steel rods securely drisen into the streambed of Dry Run. L'nless bedrock refusal is encountered sooner. the rods will be dris en a minimum of two feet into the streambed. If bedrock refusal is encountered. the rods u m be driven into a pilot hole drilled a minimum of I foot into the bedrock.
The loc:. tion and eles ations of each piezometer top of easing, ground surface and top of staff gauge will be suneyed to + - I foot for location ano to 0.01 foot for elevations.
3.2 GEOCHEMIC AL TESTING Geochemical testing will focus on the conditions downgradient of the upper trenches. The program will include the following activities:
. Collection of samples of smi and weathered bedrock for use in batch sorption experiments
. Collection of water samples for use in sorption experiments
. .\leasurement ofin-situ pil and Eh in downgradient wells and piezometers
. Batch sorption experiments to obtain sorption coefficients for uranium
. Calculations to obtain representatis e sorption coefficient values The collection of soils, weathered bedrock and waters will be governed by existing BWSI procedures. The measurement of in situ pil and Eh will follow standard procedures for pil and Eh measurement. The batch sorption esperiments uill be performed using a standard ASTM procedure.
The solid samples to be used in the batch experiments will be chosen from soil and weathered bedrock materials recoscred from piezometers located downgradient of the trenches. The wells and piezometers from which samples may be obtained are specified in Table I and the respective locations are shown on Figure 1. Soil samples will be collected from the auger borings used to install the soil piezometers. Particular emphasis will be placed on obtaining samples from the bottom of soil / top of bedrock transiti on zone. Previous efforts obtained soil samples by using a split-spoon abose the depth of auger refusal and core samples of bedrock below that depth. The transition zone consisted of bedrock fragments mixed uith clayey soil derived from weathering of the bedrock. The coring process washed away the soil materials resulting in samples consisting of only the bedrock fragments. During the 1999 tield program, esery effort will be made to ,
obtain split-spoon samples of the interface. This will allow accurate measurement of the l distribution coefficient (Kd) of this zone. Samples of competent bedrock (middle of the l 4
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- weathered bedrock zone and first shallow bedrock zone) specified in Table I will be collected by obtaining a 1 foot long core section during the drilling operation.
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( In-situ measurements of pH and Eh will be made in TPZO4 and TPZ05 and selected existing l t i lis. The existing wells proposed for in-situ measurements are listed in Table 2. These measurements are intended to characterize the water composition downgradient of the trenches in terms of parameters that are important to uranium mobility. Water samples for sorption tests w..'
be obtained from the TPZ's and existing wells used for in-situ measurements.
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4.0 DATA ANALYSIS .. ,-
The hydrologic data will be used to es ataate the downgradient groundwater flow paths from sarious locations aithin the trenches. The groundwater llow velocity groundwater flow solume and distance traseled will be calculated and used to des clop a conceptual model of groundwater flow. The resulting flow model will be used along with the data on geochemical conditions to calculate the potential rates of migration of uranium. The results of the calculations will be used to esaluate the relative perfonnance of the sarious options being considered.
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5.0 HEALTH AND SAFETY PROCEDURES l l
l Applicable BWSI standard operating procedures. including health and safety procedures. l prepared for presious site characterization efforts will be followed throughout the 1999 tield {
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T I
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R OE S S S E E S S S P E E U U U TT TT U U U - - -
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. TABLE 2 PROPOSED LOCATIONS FOR IN SITU Eh and pH MEASUREMENTS LOCATION ID FORMATION EXISTING MW11 D 2nd Shallow Bedrock MW-11S Soil MW-12D 1st Shallow Bedrock MW-17 2nd Shallow Bedrock MW-25 1st Shallow Bedrock MW-26 1st Shallow 8'-Irock MW-27 1st Shallow . ack MW-28 1st Shalo, MW-41 ist Shallow Bedrock MW-42 1st Shallow Bedrock PZ-01 Soil / Weathered bedrock PZ-02 Soil / Weathered bedrock DZ-03A Soil / Weathered bedrock NEW TPZ's TPZO4 1st Shallow Bedrock T"705 1st Shallow Bedrock l
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. Mr. Philip Rosenthal, Senior Project Manager BWX Technologies, Inc.
- P.O. Box 11165 Lynchburg, VA 24506-1165
SUBJECT:
NRC STAFF REVIEW OF THE 1999 FIELD PROGRAM WORKPLAN FOR THE PARKS SHALLOW LAND DISPOSAL AREA (TAC L51207)
Dear Mr. Rosenthal:
I am responding to your letter, dated February 26,1999, which forwarded the 1999 Field Program'Workplan for the Parks Shallow Land Disposal Area to Nuclear Regulatory Commission (NRC) staff for review. I have performed a non technical review of the workplan and do not have any comments. However, please note that, when the results of the 1999 field work is completed, and the results are forwarded to NRC staff, either as part of the decommissioning plan or via an alternative document, the NRC staff may have questions or comments on how the results were developed. Staff of the Pennsylvania Department of Environmental Protection (PADEP) have indicated to NRC staff that they intend to perform a technical review of the workplan in the near future. Please forward a copy your responses to ;
PADEPs comments on the workplan to me when they are sent to PADEP. l If you have any questions concerning the review of the workplan, please contact me at !
(301)415-6749, Sincerely, m
y %
W Dominick A. Orlando, Project Manager Low-Level Waste and Regulatory Issues Section Low-Level Waste and Decommissioning Projects Branch Division of Waste Management Office of Nuclear Material Safety and Safeguards License No. SNM-2001 Docket No. 70-3085 cc: SLDA Distribution List l
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