ML21187A319
| ML21187A319 | |
| Person / Time | |
|---|---|
| Site: | Westinghouse |
| Issue date: | 10/25/2019 |
| From: | Joyner D Westinghouse |
| To: | Kuhn K Office of Nuclear Material Safety and Safeguards, State of SC, Bureau of Land and Waste Management, State of SC, Dept of Health & Environmental Control |
| Trefethen, JA | |
| References | |
| LTR-RAC-19-85 | |
| Download: ML21187A319 (6) | |
Text
5/37 Westinghouse Electric Company Nuclear Fuel Columbia FuelFabrication Facility 5801Bluff Road
[
- Hopkins, SouthCarolina 29061 USA OCT29 2019 SCDHEC,BLWM Direct tel:803.647.1920 KimKuhn Direct fax:803.695.3964 2600Bull Street gD E
e-mail:
joynerdp@westinghouse.com
- Columbia, SC29201 wag Yourref:
Ourref:LTR-RAC-19-85 October 25,2019
Subject:
RIWorkPlanSediment Transect Sampling Plan UpperSunset Lake,LowerSunset Lake,MillCreek Mrs.Kuhn:
Please find attached foryourconsideration aproposal toconductadditional sedimentsampling within Mill Creek (including UpperSunset LakeandLowerSunset Lake) tosupport theRemedial Investigation (RI)
WorkPlan.
Based upontheSeptember 30,2019meeting anddiscussions with the Department, theattached document proposes thelocations,
- methods, andsubsequent analysis ofthesediment samples.
Respectfully, c
Dian
, oyner Principal Environmental Engineer Westinghouse Electric
- Company, CFFF 803.497.7062 (m) cc:
E.Wills, EH&SManager N.Parr, Environmental Manager J.Grant, AECOMProject Manager ENOVIARecords Enc.:"Columbia FuelFabrication
- Facility, Sediment Sampling
- Plan, Consent Agreement CA-19-02-HW, AECOM,File
- 51377, dated October 25,2019.
C2019Westinghouse Electric Company LLC
/f9 AllRights Reserved
5877 r
AECOM (803)254-4400 101Research Drive (803)771-6676
- Columbia, SC29203 i
0CT2925 October 25,2019 SITEASSESSMENT Ms.Kimberly M.Kuhn, Project Manager REMEDiATION State Voluntary Cleanup Section RBWTAU2ATION Division ofSite Assessment, Remediation andRevitalization Bureau ofLandandWaste Management 2600Bull Street
- Columbia, S.C.29201
Subject:
Westinghouse Electric
- Company, LLC Columbia Fuel Fabrication Facility Sediment Sampling Plan Richland
- County, S.C.
Consent Agreement CA-19-02-HW File
- 51377
DearMs.Kuhn:
BasedupontheSeptember 30,2019meeting withtheSouthCarolina Department ofHealth and Environmental Control (SCDHEC)
Westinghouse Electric Company LLC (Westinghouse)
Columbia Fuel Fabrication Facility (CFFF) andAECOMTechnical
- Services, Inc.
(AECOM),
AECOM submits the following sediment sampling planforSCDHECreview andapproval.
Background
CFFFiscurrently conducting multi-media assessment oftheir facility forconstituents of potential concern (COPCs) basedupontheAECOMFinal Remedial Investigation WorkPlansubmitted inJune 2019. The Remedial Investigation (RI)
WorkPlanwassubmitted tosatisfy item1ofConsent Agreement CA-19 HWbetween Westinghouse andSCDHEC.
Theongoing assessment included thecollection of18sediment/sludge samples fromJuly15,2019 through July18,2019intheon-site stormwater
- ditches, twoofthewastewater treatment plant lagoons (sludge),
theGator Pond,UpperSunset LakeandLowerSunset Lake.
Sampleresults inonelocation in thestormwater
- ditches, fourlocations within thetwowastewater treatment
- lagoons, twolocations in UpperSunset Lakeandonelocation inLowerSunset Lakecontained uranium (U) concentrations above theresidential screening level (NUREG 1757,Vol.
2,Rev.1,Appendix H).
Fromthemeeting onSeptember 30,2019,itwasdecided thatadditional dataisneededtobetter understand theextent ofuranium aboveresidential standards onWestinghouse property.
Additional sediment sampling alongseveral transects within Mill Creekupstream,
- adjacent, anddownstream ofthe Westinghouse facility wereproposed.
Proposed Sediment Sampling Transect Locations Westinghouse proposes tentransects (Figure 1)with anadditional 24sediment sampling locations within Mill Creektoobtain additional sediment quality data.
Generally, there arethree samplelocations per transect:
twowithin afewfeet oftheedgesoftheMill Creekfloodplain andoneinthepresumed middle of Toenhance andsustain theworld's
- budt, natural andsocial environments
/27 Sediment Samphng PlanOctober 2019doc
AECOM Ms.Kimberly Kuhn Page2of4 the flow channel.
IncaseswhereMill' Creek issignWicantly wider duetoimpoundment, foursediment sample locations areproposed.
Toreduce thepotential ofcross contamination bysediment that isput into suspension bythesampling activities, sediment sampling will begin downstream andworkupstream.
DownstreamAreas Threeofthe sediment sampling transects (Figure 1)aredownstream oftheLowerSunset Lakedike.
This portion ofMill Creek isheavily forested,lowland swampwithminimal flow.
Themajority oftheflow inMill Creekthrough the Westinghouse property isbywayofthediversion canal along thesouthern property boundary.
During site reconnaissanceof the sediment sampling transect endpoints, AECOMpersonnel discovered that there isafourth dike (ExitDike) ontheWestinghouse property.
TheExit Dike(Figure 2)islocated just north ofthediversion canal and contains adrainage pipethat connects thewaterflowing fromthe section ofMill Creek that flows through Upper andLowerSunset Lakestothewaterflowing downthe man-made diversion canal.
Although not fully impounding, thedepth ofthesurface waterinMill Creek appears toincrease downstream closer tothe Exit Dike.
AECOMproposes touseamultistage sedimentsampler inareas ofthesampling transects withstanding water.
Amultistage sediment sampler issimilar toa direct pushmacrocoresampler andconsists ofatwo-foot longstainless steel tubewithanacetate sleeveinside. Useofthemultistage sampler will ensure that thesediment samples arefromthedesired depth inareas of standing waterwherevisibility ofthe borehole isobstructed orunable tobeseen.
Themultistage sediment sampler istypically attached toaslidehammer that isusedtodrive itinto the sediment.
Sediment samples fromthecorewill becollected atsix-inch intervals (i.e.
0-6inch, 6-12inch) withaminimum ofonefoot ofsediment corebeing collected.
During thesediment sampling transect reconnaissance, AECOMpersonnel conducted atestrunofa multistage sampler instanding water within Mill Creek toassess the effectiveness ofthis tool forsample collection atWestinghouse.
Asediment catcher wasinstalled inthemultistage sampler duringthefirst test runandwasremoved during thesecond test run.
AECOMpersonnel drove the multistage sampler approximately twofeet into thesediment ofMill Creeknearthefourth dike.
Theinitialtest run resulted in 6-8inches ofsediment recovery inthetubeandthesecond test runresulted inapproximately onefoot of sediment recovery.
Should morethanonefoot ofsediment berecovered atasample
- location, the sediment fromthedeeperinterval(s) will also besubmitted forlaboratory analysis.
Should root matter orother underground obstructions limit theability ofthemultistage sediment sampler toreach thedesired depth after multiple attempts within areasofstanding
- water, astainless steel hand auger will beusedtoattempt toextend thesediment sample borings totheonefoot total sampling depth.
During theJuly 2019sediment sampling
- event, AECOMusedastainless steel handauger that was decontaminated between sampling locations.
Attempts tousetheponargrabsampler wereunsuccessful inretrieving sediment fromLowerSunset Lake.
M Waterlevels inUpperandLowerSunset Lakes aredeeper thanthenon-impounded sections ofMill Creek.
InthecaseofLowerSunset Lake,aboat will betheprimary method toreacheachsampling location.
incaseswherewaterisshallow (i.e.
SED-34,Figure 1)andnotboat accessible, AECOMwill usehipwaders toaccess thesediment sampling location.
Previous sediment samples(SED-19 through SED-22) from this areaofthesite weresurficial only (top sixinches ofsediment).
AECOMproposes tocollect surficial sediment samples (0-6 inch) withahandauger ineachofthenew sediment sampling locations within UpperandLowerSunset Lakes with theunderstanding that itis possible that additional vertical sedimentquality profiling mayberequired inthefuture During the bathymetric survey ofUpperSunset Lake,itwasobserved that there areportions ofthis waterbodythat, Toenhance andsustain theworld's
- built, natural andsocial environments Sediment Sampling PlanOctober 2019doc
AECOM Ms.Kimberly Kuhn Page3of4 although forested, aretoodeeptoaccess withhipwaders so,itislikely that anon-motorized boat(i.e.
canoe)will beneeded toobtain someofthesediment samples inUpperSunset Lake.
Based upon AECOM's reconnaissance, theMill Creek floodplain inportions ofthewestern extent of Upper Sunset Lake andMill Creek abovetheEntrance Dikeiswell defined with
- walkable, soft(appears to becomprisedprimarily ofdecomposed organic matter atthesurface),
semi-dry landoutside theprimary flow channel thatextend hundreds offeet fromthefloodplain banktotheflowchannel.
A handauger will beused inthesemi-dryareas orwheresurface waterisshallow enough toensure that theaugering iscompleted in asingle borehole.Boreholes created withahandauger cancollapse asthe handaugerispulled outorpushed backinto theground.
Toensure that representative sediment samples arecollected fromthedesireddepths, AECOM personnel will useatapemeasure before andafter each advancement ofthehandauger bucket toassesshowmuchsediment within thebucket isfromthe desired sampling interval.
UJ2stream Areas Theportion ofMill Creek abovetheEntrance Dike isthemostvisibly channelized portion ofthesediment study area.
Sediment samples fromthis area are being collected toassess background sediment quality.
AECOMproposes touseastainless steel auger to collect sediment samples inthesemi-dry portion of Mill Creekandthemultistage sampling device inthechannelized portion ofMill Creek.
BaseduponAECOM'sreconnaissance, theflow channelin this portion ofthesite isapproximately 15feet wide.
Mill Creek's channel islocated onthenorthern side ofits floodplain nearproposed sediment sampling location SED-51andontheeastern sideofits floodplain near proposed sediment sampling locations SED-54.
Therefore, AECOMproposes using themultistage sampling device tocollect sediment samples SED-51 andSED-54(Figure 1)fromthecenter ofthechannel with theremainingtwo background samples per transect being collected with astainless steel handauger within thesemi-dry portion ofMill Creek's floodplain.
Sediment samples will becollected atsix-inch intervals (i.e.
0-6inch, 6-12 inch)witha minimum ofonefoot ofsediment corebeing collected.
Equipment Decontamination Sampling equipment will bedecontaminated between sampling locations asoutlined intheJune 2019 AECOMRIWorkPlan.
Sediment Analyses Sediment sample analytes andquality assurance andquality control (QA/QC) samples will becollected asoutlined intheJune2019AECOMRIWorkPlan.
TheQA/QCsamples will belabeled asdescribed in theJune2019AECOMRIWorkPlan.
Toenhance andsustain theworid's
- built, natural andsocial environments Sediment Sampling PlanOctober 2019doc
AECOM Ms.Kimberly Kuhn Page4of4 Sediment Sampling Schedule Additional sediment sampling will begin approximately oneweekafter approval oftheplanbySCDHEC.
AECOM and Westinghouse hopetohavetheanalytical datafromtheadditional sediment sampling in timefortheJanuary 2020meeting intherevised RIWorkPlanschedule asdocumented intheVertical Groundwater Profiling PlanShould all ofthedatanotbereceived intimefortheJanuary 2020meeting, a
separate meetingto discuss theresults will bescheduled.
Reporting Thesediment sampling analytical results will beincluded intheRIReport.
Should youhaveanyquestions regarding theinformationprovided inthis
- plan, please donothesitate to contact AECOMat(803) 254-4400.
Sincerely, ChuckSuddeth, P.G.
Jeremy
- Grant, P.G.
Project Geologist Project Manager Attachments:
Figure 1
- Sediment Sample Locations Cc:NancyParr, Westinghouse DianaJoyner, Westinghouse
- EdWills, Jr.,
Westinghouse Toenhance andsustain theworld's
- built, natural andsociaf environments Sediment Sampling PlanOctober 2019doc
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