Zebra - TRIAD-ES Joint Presentation

368 views

Published on

Published in: Technology
  • Be the first to comment

  • Be the first to like this

Zebra - TRIAD-ES Joint Presentation

  1. 1. High Resolution Site CharacterizationApplying Next Generation Tools to AccelerateSite ClosureWilliam M. DavisTriad Environmental Solutions, Inc.Brad CarlsonZEBRA
  2. 2. • Overview: Need for High Resolution SiteCharacterization• Tools for HR CharacterizationHigh Resolution Hydro-geologicMapping ToolsReal-time Analytical ToolsSemi-quantitativeQuantitative• Strategies for HRCharacterization• Case StudiesHigh Resolution Site Characterization Applying NextGeneration Tools
  3. 3. Why are there so many old NAPLsites and why are NAPL sourcesso hard to find?• Heterogeneity of subsurface geology andhydrogeology• The nature of NAPLtransport• Need high density datato design remedy• Need cost effective NAPLsource and plumecharacterization tools6283 ft MIP/DSITMS@ 83 locations6283 ft MIP/DSITMS@ 83 locationsHigh Resolution Site CharacterizationApplying Next Generation Tools
  4. 4. • Apply HR Characterization methods to map mass and hydrogeology• Knowing mass and hydraulic conductivity allows assessment of flux• Use flux-informed decision making to target moving mass Focus remedies to reduce volume of treatment and minimize risk Understand endpoints and duration before investing in remedy Reduce total life cycle costsReturn on investment from using HR Characterization– typically 5 to 10xHigh Resolution Site CharacterizationApplying Next Generation Tools
  5. 5. SHAREPOINT WEBSITE FOR DATA SHARING
  6. 6. Cross-section from a 2D ECD Fence Slice.Installed MW overlayECD Background SliceSampling Event DataLithologyOverlayECD Graph Overlay
  7. 7. 3D ECD Fence Model
  8. 8. Using 3D modeling software, we can generate true 3D Solid Models. This PlanView model was created using ECD data from a recent MIP project . Anyorientation can be displayed and cross-sections or fence diagrams can becreated.
  9. 9. HRSC Solid Model with Surface Objects
  10. 10. HRSC Model with SubSurface Objects
  11. 11. Electrical Conductivity EC
  12. 12. What is the Membrane Interface Probe?The Membrane Interface Probe (MIP) is rapid, high-resolution field screeningtechnology that provides information about relative concentrations of VOCs in thesubsurface, and the Electrical Conductivity of the soil.The MIP uses a thin film fluorocarbon polymermembrane approx. 6.35mm in diameter whichstays in direct contact with the soil during MIPlogging.•The thin film membrane is impregnated into astainless steel screen which serves as a rigidsupport for the fluorocarbon polymer.•The down-hole, permeable membrane servesas an interface to a detector at the surface.•Volatiles in the subsurface are gettingtransferred across the membrane and partitioninto a stream of carrier gas where they areswept to the detector. The membrane is heatedin order to facilitate VOC transfer and self-cleaning.
  13. 13. The MIP System
  14. 14. THE MIP PROBEEC DipoleMembraneHeater Block
  15. 15. FIDPIDECD
  16. 16. MIP Detection LimitsMIP DETECTORSContaminates Detection Limit Carrier GasPID BTEX 1 PPM Nitrogen, HeliumFID Methane, Butane NA Nitrogen, HeliumECD Chlorinateds 250PPB Nitrogen
  17. 17. MIP Log
  18. 18. Hydraulic Profiling Tool (HPT)
  19. 19. • Advance probe atconstant rate• Inject water at lowflow rate• Measure formationpressure response2 cm/secHydraulic Profiling Tool (HPT)
  20. 20. HPT LOGEC HPT Press Flow Corr HPTPressureEst K Abs HydroPressure
  21. 21. HPT Dissipation – Static Water Level24.4ft24.5ft
  22. 22. THE MiHPT PROBEEC DipoleMIP MembraneHeater Block HPT Screen
  23. 23. The MiHPT System
  24. 24. CPT & CPT/MIP
  25. 25. CPT
  26. 26. CPT LogSleeveFrictionTip ResistanceLithologyDescriptionFrictionRatioPorePressure
  27. 27. HPT-GWSA Combined HPT and Groundwater Sampler probe!
  28. 28. HPT-GWSA Combined HPT and Groundwater Sampler probe!
  29. 29. DAKOTA - UVOST/LIF
  30. 30. UVOST/LIF
  31. 31. Hydro-Geology– Cone Penetrometer– Direct-Push Technology– Hydraulic Profiling ToolAnalytical– In-Situ ProbesMIPUVOST– GC/MS EPA Method 8260b– DSITMS EPA Method 8265Examples of Real-TimeTechnologies for High ResolutionSite CharacterizationHigh Resolution Site Characterization Applying Next Generation Tools
  32. 32. Discrete sampling combined with ex-situ, on-site analysisGW and/or soil sampling with on-siteanalysis can produce high density datasets cost effectively.GW and soil data required to collaborateSemi-quantitative MIP resultsNumerous sampling methods includingdirect push and sonic drillingHigh through put, real-time analysesusing on-site EPA MethodsHigh Resolution Site Characterization Applying Next Generation Tools
  33. 33. On-site Analysis of Vapor, Soil and GW Using US EPA Method 8265Direct sampling ion trap mass spectrometer (DSITMS)MIPVery Rapid Analytical Turn AroundSoil and GW in 2-3 min.Vapor in 3-5 min.QuantitativeHigh level QC
  34. 34. Real-time Direct Sampling Ion Trap Mass Spectrometer(DSITMS) Analysis of VOCs in Soil, GW and Vapor• Basis for US EPA SW846 Method 8265• Quantitative VOC analysesLODs ug/kg, ug/L, ug/m3• Sample turn around timesof 2-3 min. (soil and GW)• Over 80 client samples perday plus QC• Can be used as MIPdetectorMethod 5035 MeOH Extract Method 8265 AnalysisHigh Resolution Site CharacterizationApplying Next Generation Tools
  35. 35. On-site Labs using EPA SW846 MethodsEPA SW 846MethodInstrument Daily ClientSampleThroughputAdvantages Disadvantages8021c PT/GC 20 NELAPavailable, canID isomers25 minute runtimes, subject tooverload8260b PT/GC/MS 20 NELAPavailable, canID isomers25 minute runtimes, subject tooverload8265 P/DSITMS 80 2-3 minute runtimes, veryrapid recoveryfrom overloadIsomers reportedas pair/groupHigh Resolution Site CharacterizationApplying Next Generation Tools
  36. 36. • Multiple lines of evidence (data)GeologicHydrogeologicContaminant• High density data setsplan view and vertical• Adaptive, flexible, dynamic…..sampling plan with clear DQOs• On-site, real-time analysis• On-site, real-time decisions• Evolving conceptual site modelStrategies for Cost Effective Site CharacterizationHigh Resolution Site CharacterizationApplying Next Generation Tools
  37. 37. ApproachTriad approach used with full systematic planning, active involvement ofLA DEQ during planning and executionReal-time geologic data collected using CPT with pore pressure sensorReal-time measurement of TCE and daughter products by combinedCPT/MIP w/ FID/PID/ECD and DSITMSDirect push soil and GW sampling with on-site soil and GW analysisby EPA Method 8265Off-site GW analysis by EPA Method 8260 for LA DEQ decisionquality dataDaily posting of field data to password protected, project specific websiteDaily updating of evolving Conceptual Site ModelCase StudyTCE Source and Plume Investigation NASA Michoud Assembly Facility
  38. 38. Case StudyTCE Source and Plume Investigation NASA Michoud Assembly FacilityProposed transects for 190 Tank Farm and RWI
  39. 39. Case StudyTCE Source and Plume Investigation NASA Michoud Assembly FacilityStratigraphic cross section RWI
  40. 40. Case StudyTCE Source and Plume Investigation NASA Michoud Assembly FacilityDNAPL with stratigraphy in the RWI Area
  41. 41. Case StudyTCE Source and Plume Investigation NASA Michoud Assembly Facility
  42. 42. Case StudyTCE Source and Plume Investigation NASA Michoud Assembly FacilityConclusionsProject objectives were met:DNAPL source areas were delineated in three dimensions and DNAPLmass was estimated for the three areas of interest:Building 103: 65,700 kg TCE, 44,900 L (11,800 gal)190 Tank Farm: 30,900 kg TCE, 21,200 L (5,600 gal)Rinse Water Imp: 41,900 kg TCE, 29,400 L (7,700 gal)Mapped boundaries of dissolved phaseTCE and daughter products exceedingLA DEQ standards were establishedTriad approach managed bothsampling and analytical uncertaintyCollaborative data sets createdstrong/defensible final CSMData used for evaluating InterimStabilization Measures and Final Remedies
  43. 43. High Resolution Site CharacterizationApplying Next Generation Tools
  44. 44. Summary• High density data (geologic, hydro-geologic andcontaminant distribution) are required to understandDNAPL sites• Having a full tool box (hydro-geologic and analytical)allows cost effective implementationof dynamic investigations• Experienced staff must beinvolved during fieldexecution, both on-siteand off-siteHigh Resolution Site Characterization Applying Next Generation Tools
  45. 45. Summary• Many tools are available to support high densitydata collection• Using available tools, complex NAPL sites can becharacterized cost effectively• The costs associated withcreating high density,accurate Conceptual SiteModels are repaidmultiple times over duringsite remediationHigh Resolution Site Characterization Applying Next Generation Tools
  46. 46. Stratigraphy Contaminant HydrogeologyCSM viewed as an instrumentTriadInstruments,Inc.TriadometerModel T2007OperationsManualModel T2007Operations Man.Table of Contents1. DQO process2. Historical info.3. SOPs/QC4. Decision logic5. Data Manag.6. Data Commun.TriadometerModel T2007
  47. 47. How do you know when enough (data) is enough?Using the Triadapproach allows thedecision to stoptaking data to bemade withconfidenceBEFORE youleave the site.High Resolution Site Characterization Applying Next Generation Tools

×