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Will Fair

3D Geologic Visualization for Fractured Rock Aquifer Characterization

Fractured Rock Hydrogeology, Site Assessment and Characterization, Unique Analytical Methods, Visualization /

Used Advanced Visual Systems (AVS) software [not to be confused with EVS] to create a 3-D geologic model of a research site in Raymond, California. The model aided interpretation of borehole geophysical logging data. The research site was funded by the U.S. Department of Energy and U.S. Environmental Protection Agency.   When used judiciously, 3D […]

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Groundwater Flow Modeling for a Proposed Nuclear Waste Repository

Fate and Transport, Fractured Rock Hydrogeology, Modeling, Unique Analytical Methods /

Used the computer code TOUGH2 (Berkeley National Lab) to construct a 3-D groundwater model of the proposed nuclear waste repository at Yucca Mountain, Nevada. Model accurately represents faulted strata of variable thicknesses, orientations, and displacement along strike. Numerical simulations of the flow downstream from the region directly below the potential repository show that a high

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Conceptual Site Model of Fractured Rock Superfund Site

Chlorinated Solvents and DNAPL, Fate and Transport, Forensic Hydrogeology, Fractured Rock Hydrogeology, Site Assessment and Characterization, Visualization /

Analyzed historical site characterization data and TCE concentration trends to characterize fracture zones in fractured dolostone aquifer and the factors affecting pump and treat system performance. The revised Conceptual Site Model provided the basis for reducing extraction rates and remedial costs. This project exemplifies how a detailed reexamination of existing site data can provide a

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Soil and Sediment Assessment Calculator

Chlorinated Solvents and DNAPL, Sediment and Surface Water, Unique Analytical Methods /

Developed SPARGS (Stochastic Partitioning Groundwater-Surface water calculator), used to quantify groundwater plume discharge and subsequent surface water dilution, chemical partitioning in sediment, and assessment of residual NAPL in soil samples. The calculator is a spreadsheet-based program constructed as a stand-alone software application, and has an easy user interface, Monte Carlo analysis, and lookup tables.  

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DNAPL Assessment Toolbox

Chlorinated Solvents and DNAPL, Unique Analytical Methods /

Developed Excel-based VBA program used to assess if NAPL is present in the subsurface based on user-defined soil, groundwater, or soil gas concentrations. Program also performs estimates of NAPL mass distribution (free-phase, dissolved, vapor, and sorbed) and considers the uncertainty of chemical and field properties via Monte Carlo calculations.       The Excel-based tool

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Plume Degradation Analysis via CSIA and PFAS Evaluation

Chlorinated Solvents and DNAPL, Fate and Transport, Forensic Hydrogeology, PFAS, Site Assessment and Characterization /

Evaluated PCE, TCE, and cis-DCE concentration data via Compound Specific Isotope Analysis (CSIA) to provide additional line of evidence that a groundwater plume is degrading and that the VOCs detected in private wells originate from an upgradient landfill.   The CSIA method was used to analyze carbon (δ¹³C) and chlorine (δ³⁷Cl) isotopes in PCE, TCE,

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Hazardous Waste Landfill – Data Evaluation and Conceptual Site Model Development

Chlorinated Solvents and DNAPL, Fate and Transport, Forensic Hydrogeology, Site Assessment and Characterization /

Engaged to develop a Conceptual Site Model (CSM) for the Landfill Superfund Site. The CSM was constructed using a multiple lines-of-evidence approach, integrating historical and contemporary soil, groundwater, sediment, and surface water data to evaluate contaminant fate and transport.   Key Findings included Identification that a former sludge disposal area and 2,000 buried drums were

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High Resolution Site Characterization – Fractured Rock Aquifer

Chlorinated Solvents and DNAPL, Fate and Transport, Forensic Hydrogeology, Fractured Rock Hydrogeology, Site Assessment and Characterization, Visualization /

High-resolution site characterization of contaminated groundwater in fractured and faulted sandstone (Passaic Formation). Integration of large dataset including chemical and hydraulic data from 1,100 wells, 19,800 soil samples from 9,000+ locations, multiport wells (19 to 24 ports/well), surface and borehole geophysics (110 borings), rock coring, and integration of on-site and off-site historical records. Bedrock aquifer

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Author: Hydrogeologic Characterization of Fractured Rock Formations – A Guide for Groundwater Remediators

Communication and Education, Fractured Rock Hydrogeology, Site Assessment and Characterization /

By Andrew J.B. Cohen, 1995.   This guidance report describes, compares, and provides recommendations for using and integrating different characterization methodologies, including surface and subsurface fracture detection and measurement, well drilling, pumping, injection and tracer tests, geophysical logging, borehole flow logging, seismic imaging techniques, and computer visualization techniques.   Overview   A field site was

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