hrsc techniques: high-resolution hydrogeologic characterization
Post on 12-Apr-2017
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High-Resolution Site Characterization (HRSC)Techniques:
High-ResolutionHydrogeologic Characterization
Eric W. Garcia, PG, CEG, CHGPresident/Principal Hydrogeologist
Sacramento, CaliforniaGlobal Reach
Geologists with HRSC Tools
ASC Service Offerings
• MIP - Membrane Interface Probe
• HPT - Hydraulic Profiling Tool
• OIP – Optical image Profiler
• UVOST® - Ultra-Violet Optical Screening Tool
• CPT - Cone Penetration Testing
• PST - Pneumatic Slug Testing
• 3-Dimensional (3D) Modeling & GIS Integration
• New Technology Evaluation
• What is HRSC?
• DP HRSC Technology Overview• OIP – Optical Image Profiler
• HPT – Hydraulic Profiling Tool
• Typical Applications
High-Resolution Hydrogeologic CharacterizationPresentation Overview
• Enhanced Site Details (Scale Appropriate)
• Reduce Uncertainty (Better CSM’s)
• Best Management Practice (BMP)
• Applicable to all Sites
• Data Density– DQO (Data Quality Objective)
High-Resolution Site Characterization (HRSC)
Data Density Example30 Borings, 10 Wells, 10 Years
120 Soil & 400 GW Samples = 520 Data Points
10 DP Locations to 50 Feet (3 Days)10 Locations x 20 Samples/Foot x 7 Channels =
>70,000 Data Points
High-Resolution Site Characterization (HRSC)
HRSC Effectiveness
• Better Quality of Analytical Data (Selection)
• Better Definition of Analytical Data (Data Density)
• Reduction in Iterative Events (Project Time)
• No IDW’s
• Hydraulic Profiling Tool (HPT)
• UVIF (OIP/LIF/UVOST®/ROST, FFD)
• Membrane Interface Probe (MIP)
• Cone Penetration Testing (CPT)
High-Resolution Site Characterization (HRSC)Direct Push Technologies
Optical Image Profiler (OIP)
NEW Technology!
UVIF Technology for Hi-ResolutionReal-Time Hydrocarbon Detection
Purpose:• UV induced fluorescence of NAPL
hydrocarbons in soil.
Method:• High intensity UV light directed at the
soil • Hydrocarbons present fluoresce.• An Image of the soil is captured.• Analyzed for fluorescence.
Visible light images may also be obtained.
Light Source
Camera
EC Dipole
OpticalWindow
OIP Description
Hydraulic Profiling Tool (HPT)Key Features
• Fast, Continuous, Real-time Profiling– Hydrostratigraphic/Hydrogeologic Characteristics
– Formation Hydraulic Properties
– Soil Electrical Conductivity (EC)
• High Resolution – 0.05 ft (1.5 cm)
• Digital Output
Hydraulic Profiling Tool (HPT)
Primary Data Collected• Electrical Conductivity (EC)
• HPT Pressure
• HPT Flow Rate
Soil Electrical Conductivity (EC)
Soil EC (Fresh Water)
Low EC = Coarse-Grained SoilHigh EC = Fine-Grained Soils
Electrical Conductivity (EC) “fresh water formations”• Increase EC = Increasing Fine Content• Decrease EC = Coarser Grained
HPT Pressure (all formations)• Increasing P = Decreasing Permeability• Decreasing P = Increasing Permeability
HPT Principals of Operation
Relationships BetweenEC, Pressure, & Flow
Coarse-Grained Soils• Low EC• High Flow• Low Pressure
Fine-Grained Soils• High EC• Low Flow• High Pressure
HPT Principals of Operation
Low EC, High Pressure, Low Flow• Caliche• Silty/Clayey Gravels
High EC, Low Pressure, High Flow• Saline• High TDS Waters
HPT Principals of OperationExceptions to the Rules
HPT Applications
Hydrogeologic Characterization• High-Resolution Hydrostratigraphic Modeling
• Piezometric Head – Confined & Unconfined
Conditions
• Estimation of Hydraulic Conductivity (K)
• Infiltration/Permeability Studies
HPT Applications
CSM & Remedial Design/Implementation• Migratory Pathway Delineation
• Target Lithology/Zone Identification & Delineation
• Well Placement & Construction
• Remedial Injection Calculations - ROI
• Remedial Action QA/QC
HPT Applications
• Estimation of Hydraulic Conductivity (K)
• Migratory Pathway Delineation
• Target Lithology/Zone Identification & Delineation
• Remedial Action QA/QC
• Well Placement & Construction
• Infiltration/Permeability Studies
Estimating Hydraulic Conductivity (K)
Empirical ModelK = f(Q/PF)
*Model Limits ~0.1 to 75 ft/day
HPT Data needs to be corrected for:• Atmospheric Pressure• Column Height
PHPT = PATM + PH + PF
Estimating Hydraulic Conductivity (K)Correcting for Hydrostatic Pressure
Hydrostatic Pressure
2.31 ft = 1 psi0.433 psi/ft
ResourcesHPT SOP: Geoprobe Technical Bulletin MK3137Geoprobe Direct Imaging - http://www.geoprobe.com
HPT Standard Guide (ASTM D8037-16)“Standard Guide for Direct Push Hydraulic Logging for Profile Variations of Permeability in Soils”
Accelerated Site Characterization [ASC] (ASTM E1912)“Standard Guide for ASC for Confirmed or Suspected Petroleum Releases”
Expedited Site Characterization [ESC] (ASTM D6235)“Standard Practice for ESC of Vadose Zone and Ground Water Contamination at Hazardous
Waste Contaminated Sites”
US EPA ESA (EPA-510-B-97-001)“Expedited Site Assessment Tools for Underground Storage Tank Sites”
Resources
US EPA HRSC https://clu-in.org/characterization/technologies/hrsc/
US EPA Clu-In https://clu-in.org/characterization/
US EPA TRIAD http://www.triadcentral.org/
ASTM ESC http://www.astm.org/Standards/D6235.htm
ASTM ASC http://www.astm.org/Standards/E1912.htm
Brownfields https://brownfieldstsc.org/roadmap/contByInvTech.cfm
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