High Resolution Site Characterization for Contaminated ... · Included with MIP and HPT data...
Transcript of High Resolution Site Characterization for Contaminated ... · Included with MIP and HPT data...
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High Resolution Site Characterization for Contaminated Site
Remediation
Oregon Brownfields Conference
AndrewPunsoniNorthwestProgram
ManagerCascadeTechnicalServices
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What is HRSC ?
• Spatial structure of hydrogeologic variables controlling contamination distribution, transport, and fate is on the centimeter scale
• Remedies involving injection/extraction of fluids are controlled by the same variables at the same scales
Subsurfaceinves<ga<onappropriatetothescaleofheterogenei<esinthesubsurfacewhichcontrolcontaminantdistribu<on,transport,
andfate,attherequireddegreeofdetail
HRSC is not just “Direct Sensing”. It requires a suite of tools and approaches used in a strategic manner.
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Industry Past
Tradi&onalSiteAssessment=‘Shoo&ngfromthehip’
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Industry Evolution
HRSC=TargetedCharacteriza&on(andwelldesign)
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HRSC Addresses Two Critical Issues • Sampling Scale and Data Averaging
– Measurements must be made at a scale that is meaningful with respect to the variability of the quantity being measured
• Coverage – Profiles and Transects – Horizontal spacing – Vertical spacing
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~2
5 c
m
mm-Scale Textural Changes Control DNAPL Migration Poulsen&Kueper,1992
DNAPLdistribu&oniscontrolledbycapillarypressuresthatvaryatthemmscale.Distribu&onisverycomplex.
KeyPoint
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ToolBox Technology Purpose
ElectricalConduc<vity(EC) DetermineRela<veGrainSizeIncludedwithMIPandHPTdata
MembraneInterfaceProbe(MIP)
VOCDelinea<on,
HydraulicProfilingTool(HPT) Rela<veHydraulicConduc<vity
MiHPT CombinedSystemWaterlooProfiler HydraulicConduc<vity&SamplingUVOST/TarGOST FuelLNAPLDelinea<on/MPG&
CreosoteMobiLab ISO17025Cer<fiedLabData
CoreDFN Migra<onPathwayDetermina<on
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MiHPT–MembraneInterfaceHydraulicProfilingTool
• ProvidingtheWholePicture– Lithology:ElectricalConduc<vity(EC)
– VOCMass:MembraneInterfaceProbe(MIP)
– HydraulicConduc&vity:HydraulicProfilingTool(HPT)
• 3Tools–OneBoring
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WaterlooAPS™ Data Acquisition Configuration and Process
Notebook computer
Flow meter
Data acquisition electronics String potentiometer on drill rig/
Geoprobe® measures depth
Real-time Ik and water quality data
Pressure vacuum gauge
Reversible variable-speed peristaltic pump
or gas-drive pump Water quality sensor
Valve
Compressed nitrogen
Stainless steel pressure vessel with analyte-free
water
Pressure transducer
1/8” stainless steel tubing
Waterloo profiler tip with stainless steel screened inlet ports
Sample bottles with stainless steel holders
Onsite lab
Measures: § Specific conductance § pH § Dissolved O2 § Oxidation-reduction potential (ORP)
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UVOST Field Log
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Jet/KeroseneGasDieselOils
Jet/KeroseneGasDieselOils
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Fully Accredited Onsite Laboratories
NELAPAccreditedNJ,NY
ISO17025Cer<fied
Ouronsitelaboratoriesarefullyaccreditedandprovidethesamehighqualitydatathatyourconven<onallaboratorydoes,butwith:
• Rapidturnaround
• Onsiteconvenience(nopackingandshipping)
• Lowercost
• Flexibility
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Core DFN Conceptualization of Source Zone and Plume Evolution in Fractured Sedimentary Rock
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Transect Approach for Groundwater Contaminant Plumes
Flow DNAPL Layers
Solu
bilit
y
Profile SourceZone
SteveChapman–UniversityofGuelph
• Profiles– Closever<calspacingofsamplingpoints/measurementsatasingleloca<on
– Smallvolumeofsample/measurement
– Ver<calspacing?• Transects– Seriesofprofilesalongalineorientedatarightangletothedirec<onoftransport
– Horizontalspacing?• Notlongitudinalsec<onsOutside In Approach
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Thank You For Listening!
Andrew Punsoni Program Manager
925.768.8377 [email protected] Cascade Technical Services
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Have a Safe Day