An Adaptive, Real-Time Approach to Comprehensive Site ... · hydrostratigraphic log, supporting...
Transcript of An Adaptive, Real-Time Approach to Comprehensive Site ... · hydrostratigraphic log, supporting...
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High Resolution Site CharacterizationAn Adaptive, Real-Time Approach to Comprehensive Site Assessment____________________________________________
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Real Time, Rapid & High Density Data
Collection
What is High Resolution Site Characterization
Adaptive Methods using the Right
Tools
Development of Mass Flux Based
CSM
Proper Data Interpretation Based
on Geology
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HRSC Tool Kit – picking the right tools for the job (many more than these!)
What is High Resolution Site Characterization
HPTUVOST CPT WCSS
MIP
MiHPT
TarGOST
DyeLIF
Waterloo APS
VAP
Field GC
FLUTe
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Linear Process
Iterative work plans
Soil and groundwater sampling
Geologic and hydrogeologic testing
Analysis of data
Reporting
Traditional Site Characterization
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Responsive to all four phases of contamination
Traditional Site Characterization
Poor contaminant phase differentiation and delineation
Methods
Soil Boring Investigation
Monitoring Well Network
Vapor Survey
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Traditional Soil Borings & SamplingUnreliable sample recovery
Relatively low daily production rates
Generates IDW
Ex-situ sample handling and analysis
Subjective interpretation of lithology
Contamination sampling commonly limited to vadose zone
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Monitoring Wells & NAPLIn-well NAPL thickness measurements can lead to significant overestimation or underestimation of true NAPL saturation
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Improving CSMs with Relative Mass Flux Data
Transport Zone(~80-90% of mass flux)
Storage(<1% of mass flux)
Slow Advection Zone(<10-20% of mass flux)
Moderate to low permeabilitye.g., Silts, Medium Sands
High permeabilitye.g., Coarse Grained Sands
Low permeabilitye.g., Fine Sands,Silty Clays, Clays
SourceZone
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MIP LIF HPT
• Vapor, Dissolved and Sorbedphase VOCs
• DNAPLs• CVOCs (PCE,
TCE, etc.)• BTEX• Methane
• NAPL• Residual
Petroleum• Diesel• Gasoline• Fuel Oil• Jet Fuel• Coal
Tars/Creosotes
• Formation Hydraulics
• Soil Lithology
• K Values• Water
Table Elevations
Laser Induced Fluorescence Hydraulic Profiling Tool
HRSC Down-Hole Tools
Membrane Interface Probe
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Laser-Induced Fluorescence – LIFDeveloped by Dakota Technologies, Fargo, ND
UVOST® TarGOST®
Tar-specific Green Optical Screening Tool
Detects coal tars/creosote (DNAPL) containing
moderate to heavy PAH concentrations
Ultra-Violet Optical Screening Tool
Detects fuels/oils (LNAPL) containing low to moderate
PAH concentrations
DyeLIFTM
Dye-enhanced Laser Induced Fluorescence
Detects chlorinated DNAPL at a variety of sites
such as former dry cleaners
Real-time data production, typically 300 to 500 feet per day using DPT
UVOST and TarGOST employ lasers for excitation of polycyclic aromatic hydrocarbons (PAHs) present in NAPL
DyeLIF combines LIF technology with the injection of fluorescent dye. Dye injection backpressure provides information on soil permeability
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New Combination LIF ToolsDeveloped by Dakota Technologies, Fargo, ND
UVOST-HP & TarGOST-HPHydraulic profiling component now available with all LIF technologies
Optimize LIF and hydrostratigraphic data correlation
Reduce time in field required for comprehensive assessment
Dual LIF provides simultaneous LNAPL and DNAPL data collection for commingled sites
Dual LIFCombines UVOST and TarGOST technologies
in single tool
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LIF Technology Description
Shock-resistant and water-tight SPOC is advanced with direct-push equipment.
UVOST and computer provide real-time data logging during assessment.
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LIF Technology Description – UVOST & TarGOST
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Representative UVOST-HP Log
UVOST-HP OutputDownhole hydraulic pressure
Changes in flowEstimated K
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Monitoring Wells & NAPLAnother look at our in-well NAPL thickness compared to LIF logging true NAPL thickness
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Monitoring Wells & NAPL
Laser-Induced Fluorescence
Another look at our in-well NAPL thickness compared to LIF logging true NAPL thickness
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Direct Image® TechnologiesDeveloped by Geoprobe Systems®, Salina, KS
MIP HPTHydraulic Profiling Tool
Produces a detailed hydrostratigraphic log,
supporting estimation of hydraulic conductivity
Membrane Interface Probe
Logs dissolved and vapor phase VOCs and soil EC
with depth
MiHptCombination MIP/HPT
Combines MIP and HPT technologies into single
tool
Real-time data production, typically 125 to 150 feet per day
MIP not the most effective tool for NAPL screening
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Membrane Interface Probe (MIP)Field screening/mapping tool
DPT deployment
Vapor, dissolved and sorbedphase VOCs
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MIP Log
CVOCs (PCE, TCE, etc.)
BTEX
Methane
Semi quantitative
Requires additional lines of evidence to interpret properly
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Hydraulic Profiling Tool (HPT)
In-situ lithologic and hydraulic properties
Electrical conductivity measurements indicate soil types (sand, silts, clays)
Relative subsurface hydraulic permeability
Water table elevations
Estimates K values
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Membrane Interface Probe / HPT (MiHpt)Est. K (ft/day)
HPT Press. Max (psi)EC (mS/m)
HPT Flow Max (mL/min) Combines MIP and HPT
data in single push
Prevents correlation ‘inconsistencies’ from adjacent borings
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Mapping LNAPL in 3D
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Mapping LNAPL in 3D
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Mapping LNAPL in 3D
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Thank you!
David J. HeicherSoutheast Regional Manager/HRSC Specialist
843.789.9095
www.dakotatechnologies.com