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Deposition Designation Station

Hydrology Expert Witnesses

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David Wilshaw, MS, PG
P.O. Box 783547
Winter Garden FL 34778
phone: 407-342-7737
David Wilshaw, MS, PG has over 31 years of experience in Engineering Geology, Geotechnics and Geo-environmental assessments. Established Britannia Solutions, LLC to provide Sinkhole Neutral Evaluation and expert litigation support service to insurance carriers, policyholders and their respective legal advisers. Mr. Wilshaw offers his services as an expert witness not only with respect to disputed sinkhole insurance claims but also in many other specialized areas of forensic engineering geology, especially Slope Failures, Underground Mining Subsidence and the Adequacy of Ground Investigations in relation to claims under construction contracts.

David Wilshaw has been a Florida DFS-certified Neutral Evaluator under §627.7074 Florida Statutes since 2011. He is licensed as a Professional Geologist in Florida and Tennessee and is registered as a Chartered Geologist and Fellow of the Geological Society in the United Kingdom. He is an Adjunct Professor of Earth Science. In the last 8 years, he has been Professional Geologist of Record for over 850 cause of subsidence investigations, carried out in accordance with Florida’s sinkhole insurance statutes, in relation to sinkhole loss claims across Florida, ranging from the Panhandle to the Florida Keys.

Litigation Services Include:
  • Testifying Expert at Deposition over 100 times.
  • Testifying Expert at Trial over 20 times.
  • Neutral Evaluation of over 135 Disputed Sinkhole Insurance Claims in accordance with Section 627.7074 Florida Statutes
  • Peer review and expert opinion to defense and plaintiff attorneys for over 1,000 cause of subsidence reports relating to claims for sinkhole loss
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James A. Jacobs, PG, CHG, CPG
229 Tewksbury Ave.
Point Richmond California 94801
phone: 510-590-1098
fax: 510-232-2823
James A. Jacobs, PG, CHG, CPG, has over 30 years of experience as a Geologist / Hydrogeologist and licensed contractor focused on answering geologic, environmental impairment, and forensic questions. He is a certified hydrogeologist in California and Washington and a Professional Geologist in California and several other states.

A Fulbright Senior Scholar with 4 awards in environmental engineering and science, his projects relate to collecting, describing, and analyzing Soil, Rock, Groundwater, Vapor, and Stormwater samples, summarizing the data and creating useful technical information and cost recovery statements for decision makers or settlements. His other projects relate to peer review and contractor evaluation projects.

Mr. Jacobs has provided litigation services in the investigation and analysis of cases involving contamination by hydrocarbon and solvent spills and leaks, erosion, flooding, and related issues. He has provided testimony assisting with many settlement conferences. Mr. Jacobs is qualified to testify in municipal, state, and Federal courts.

Litigation Support and Expert Witness:
  • Perform litigation and technical support for various environmental and engineering cases from evaluating remediation history to well damage to erosion control
  • Estimate reasonable and necessary remedial costs for settlement conferences
  • Serve as an objective peer reviewer
  • Expert witness testimony on environmental cases
Since 2002, Mr. Jacobs has been an elected director of two public agencies, a local sewer district, and a community services district. As such he is interested in I&I issues and sewer gas and volatile contaminant vapor intrusion into indoor air spaces via ineffective vapor seals on fixtures or dry P-traps in buildings. He performs cost allocations for environmental litigation, and also provides oil and gas production verification.

View James Jacobs' Consulting Profile.
James A. Jacobs, et. al (eds.)
Put together by a team of scientists, engineers, regulators, and lawyers, the Chromium(VI) Handbook consolidates the latest literature on this topic. The broad scope of this book fills the need for a comprehensive resource on chromium(VI), improving the knowledge of this contaminant at a time when the extent and degree of the problem is still being assessed. It addresses naturally occurring and anthropogenic sources, geology and geochemistry, toxicity, treatment, regulatory issues and legal cases, and recommendations.
James A. Jacobs, et al
Provides the tools needed to analyze and solve acid drainage problem. Featuring contributions from leading experts in science and engineering, this book explores the complex biogeochemistry of acid mine drainage, rock drainage, and acid sulfate soils. It describes how to predict, prevent, and remediate the environmental impact of acid drainage and the oxidation of sulfides, offering the latest sampling and analytical methods. Moreover, readers will discover new approaches for recovering valuable resources from acid mine drainage, including bioleaching.
James A. Jacobs, et al
The definitive guide to petroleum hydrocarbon fuel spill and leak causes, prevention, response, and cost recovery.It highlights the complex nature of petroleum hydrocarbon fuel extraction methods, the unintended consequences when disasters occur, spill behavior, and environmental impact mitigation. This practical resource discusses engineering techniques; long-term biological and environmental effects; dealing with insurance claims, litigation, and legislation in overlapping jurisdictions; and much more.
James A. Jacobs, et. al (eds.)
Written by an expert team of scientists, engineers, and toxicologists, MTBE: Effects on Soil and Ground-Water Resources provides complete in-depth coverage of the assessment and potential remediation strategies of methyl tertiary-butyl ether (MTBE).
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Design, Analysis, Expert, Trial, Forensic Witness
Counties of Westchester, Rockland, Queens, Putnam
Dutchess, Orange, Ulster, Nassau, Suffolk, Bronx, Statin Island
Richmond & Brooklyn / Kings County Long Island / NY City / Manhattan / White Plains
Shrub Oak NY 10588
phone: 914-245-6320
fax: 914-245-6335
Vincent A. Ettari, P.E., P.C. specializes in many fields of Civil, Structural, Site, Coastal, Safety & Environmental Engineering, including the Design & Analysis of:

  • Structures, Buildings, Houses, Dwellings
  • Foundations, Footings, Elevators, Retaining Walls, Dams
  • Development Plan & Plats for Sites, Properties, and Residences
  • Underground & Subsurface Chamber / Chambers
  • Scaffold, Scaffolds, Scaffolding
  • Site Plans & Subdivisions: Industrial, Commercial, Residential
  • Roads, Roadways, Ramps, Walks, & Man Hole Cover / Covers
  • Sidewalks, Walkways, Paths & Pathways
  • Lighting: Lamps, Lights, Lamp Poles, Light Levels
  • Luminaries & Illumination (Specifications)
  • Rock Cuts & Blasting (Topography, Specification)
  • Soil Slopes / Samples / Mechanics / Geotechnical Engineers
  • Sanitary Facilities, Septic Systems (Board of Health Septics Approval)
  • BOHA / DEP Approvals
  • Water, Drains, Drainage, Sewer & Sewage Lines & Mains
  • Culvert / Culverts, Manholes (Man Holes) & Catchbasins / Catch Basins
  • Inspection, Supervision, and Certification of Construction
  • House Inspector & Inspections
  • Road, Roadway, Walk & Sidewalk Premises Liability (e.g., Steep Slope)
  • Walkway, Path, Ramp & Pathway Premise Liability (e.g., Steep Grade)
  • Coefficient of Friction / Slip & Fall (Snowy & Icy Conditions)
  • Vertical Discontinuity / Discontinuities / Trip & Falls
  • Small Ports / Port, Marinas / Marina, Marine Dredging
  • Levees, Jetties, Dolphins, Piers, Sea & Flood Walls
  • Wharves, Breakwaters, Bulkheads, Weirs, & Revetments
  • Groins, Dikes and Waterfront Structures
  • Drainage Basin Analysis, Rainfall, Floods & Flood Plain / Plains
  • Flooding Controls & Control Devices
  • Storm Water Runoff (10, 25, 50 & 100 Year Storms)
  • Pressure & Pressures: Wind, Wave / Waves, Ice, Snow
  • Rain Fall Run Off & Storm Water Pollution Treatment
  • Excavation, Grading, Fills & Filling Operations (Swales, Berms, Silt Fence)
  • Erosion Control, Sediment Barriers, Sedimentation / Catch Basins (Hay Bales)
  • Pumps and Pump System Line & Main
  • Slope, Dam, Levee, Jetty, Dolphin, Pier, Wharf & Breakwater Collapse
  • Bulkhead, Weir, Revetment, Groin, Dike, Footing & Foundation Failures
  • Failure of Fire Containment Wall, Elevator or Water Front Structure
  • Tenement House Façade Collapses
  • Code History of Existing Multiple / Multi-Family Dwelling / Building
  • Application of Municipal Building, Fire & Property Maintenance Codes
  • City, Town & Village Zoning, Planning, Steep Slopes & Grades, Wetland & Wetlands Ordinances
  • Testimony at Board Meetings as a Design Forensics Engineer
  • 3/23/2009 · Engineering
    In many places of NYS, public water supply systems are available. If your site is situated in such a location, then the lots which will result from your contemplated subdivision will be required to draw their water supply from the municipal water system

    3/5/2009 · Construction
    As you enter into a contract to buy a piece of commercial or industrial property, you should always keep in mind that your new town and county have rules which you must abide by. With regard to the exterior areas of your premises, there are rules concerning your septic system, the maintenance of your building, the addition onto your structure, etc

    12/28/2006 · Construction
    In developing a vacant piece of land, steep slopes are often an issue. And, the more prevalent the steep slopes are on a site, the greater the likelihood that retaining walls will be part of the Approved Site Plan. Let us consider three municipalities which regulate the final allowable slopes for land which is filled, cut, or graded

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    David L. Mitchell
    P.O. Box 70
    Dayton TX 77535
    phone: 936-257-1633
    fax: 936-258-4237
    David MitchellGEO Associates provides litigation support services and expert witness testimony for civil and criminal investigations and insurance industry cases (both plaintiff and defendant) that involve Groundwater Pollution and Data Analysis, Forensic Geology and Geophysics, Hydrology Modeling, and Forensic Meteorology including Weather Event Re-Construction and Force Majeure cases. GEO Associates can assist attorneys and insurance claim professionals in obtaining, analyzing, modeling, and interpreting the correct geophysical/geological and meteorological data for their case.

    GEO Associates uses the latest approved Regulatory EPA and USGS numerical modeling software to map the concentration levels and transport of air and groundwater pollutants. GEO Associates numerical modeling expertise, combined with their advanced knowledge of meteorological, geophysical and geological data gathering and processing, provides strong support to the attorney and client for cases involving Air Pollution, Reduced Visibility, Severe Storms, Groundwater Contamination, Flooding, Wind Damage and Hazardous Material Spills and Releases to Air and/or Water, which result in accidents, contamination of aquifers, toxic air, property damage, personal injury and death.

    Services Include:
  • Forensic Geology
  • Industrial Groundwater Pollution
  • Toxic Tort Strategy
  • Environmental Surface and Groundwater Pollution
  • Mapping of Surface and Groundwater Contamination
  • Forensic Hydrology
  • Groundwater Computer Modeling
  • Aquifer Systems Analysis
  • Hazardous Spill Releases
  • Geological and Geophysical Data Acquisition, Processing and Analysis
  • Geological and Geophysical Mapping of Reservoirs
  • Observational Field Programs
  • Reflection and Refraction Seismology
  • Forensic Seismology
  • Seismic Investigations
  • Oil and Gas Operations and Operator Performance
  • Marine and Land Seismic Operations
  • Value Analysis of Proprietary Geophysical and Geological Data
  • 2D and 3D Reflection Seismology Modeling and Analysis
  • Fluid Dynamics and Reservoir Analysis
  • Toxic Fluid Migration
  • Class Action and Force Majeure Cases
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    Chuck Dutill, PE
    Expert Witness | Principal Consultant
    1240 West Chester Pike, Suite 213
    West Chester PA 19382
    phone: 610-701-5650
    For over 35 years, Chuck Dutill, P.E., has been performing Hydrology and Environmental Engineering nationwide. He has focused on wastewater, stormwater, flooding, sewers, septic systems, groundwater, drainage, runoff, hydrology, hydraulics, backups, drinking water, and air quality.

    Litigation Support - Mr. Dutill has spent approximately 25% of his professional time providing expert witness services nationwide for over 35 years. About 55% of his expert witness services have been for defendants, with approximately 45% for plaintiffs.

    He has issued more than 95 expert reports, been deposed over part or all of 25 to 30 days, and testified in court (including jury and non-jury trials) over part or all of 25 to 30 days. As indicated in feedback from attorneys on expert witness cases, some of his strengths include diligence, high standards, understandable input, responsiveness, timeliness, thoroughness, oral communications, effective report writing, listening skills, efficiency, professional demeanor, organization, and assistance to counsel.

    • Hydrology
    • Stormwater Management
    • Flooding
    • Drainage
    • Runoff
    • Sewer Systems
    • Sanitary Sewage
    • Wastewater Treatment
    • Septic Systems
    • Backups
    • Overflows
    • Surface Water
    • Groundwater
    • Hydrogeology
    • Erosion
    • Grading
    • Hydraulics
    • Floodplains
    • Piping Systems
    • Wells
    • Mold
    • Soils
    • Air Quality
    • Regulations
    • Combined Sewers
    • Detention
    • Maintenance
    • Inspections
    • Dams
    • Sinkholes
    • Hazardous Waste
    • Aquifers
    • Drinking Water
    • Hydraulic Fracturing
    • Health and Safety
    • Standard of Care
    • Toxicity
    • Contamination
    • Spills
    • Pollution
    • Remediation
    • Modeling
    • Storage
    • Sedimentation
    • Hydroplaning
    • Odors
    • Waste Management
    • Wetlands
    • Landfills
    • Water Quality
    • Monitoring
    • Storm Sewers
    • Infiltration/Inflow
    CV Available Upon Request

    View Mr. Dutill's Consulting Profile.
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    Lorne G. Everett, PhD, DSc
    3700 State Street. Suite 350
    Santa Barbara CA 93105
    phone: 805-880-9301 (Direct) or 805-880-9300 (Office)

    Lorne Everett Associates Expert Photo

    Lorne G. Everett, PhD, DSc, CGW, PH, PH-GW, BCES, HON.D.WRE, FASCE, FAWRA, FASTM, is an Environmental Consultant with over 40 years of experience in site characterization and remediation of Soils and Groundwater.

    Background - Dr. Everett served as the Chief Scientist at Haley & Aldrich, Shaw Environmental, ARCADIS, and Metcalf & Eddy Inc. He is a retired Professional Researcher (Level VII) in the Bren School of Environmental Science & Management at the University of California at Santa Barbara (UCSB) and Past Director of the Vadose Zone Monitoring Laboratory at UCSB. The University of California describes full professor Level VII as “reserved for scholars of great distinction.”

    Dr. Everett is an internationally recognized expert who has conducted extensive research on Subsurface Characterization and Remediation. He is Chairman of the ASTM Task Committee on Groundwater and Vadose Zone Monitoring. He also chaired the Remediation Session of the First USSR/USA Conference on Environmental Hydrogeology (Leningrad, 1990).

    Dr. Everett has received numerous awards, published over 150 technical papers and reports, holds several patents, developed 11 national ASTM Vadose Zone Monitoring standards and authored and edited over 10 books including: Vadose Zone Monitoring for Hazardous Waste Sites, and Subsurface Migration of Hazardous Waste. His book entitled, Groundwater Monitoring was endorsed by the Environmental Protection Agency (EPA) as establishing “the state-of-the-art used by industry today” and was recommended by the World Health Organization for all developing countries.

    Dr. Everett on Vapor Intrusion

    Litigation Support - Dr. Everett is an expert witness with an established track record in over 80 court cases involving over $2 billion dollars. He provides expert witness services for Toxic Tort Cases, when one or more parties allege health effects and/or property damage from chemicals released to the environment by another party, and Allocation Cases, in which two or more parties disagree over who caused a release to the environment and how much money each party should contribute toward to the cleanup.

    Areas of Expertise:
    • Vapor Intrusion
    • Class Action Lawsuit
    • Personal Injury
  • Toxic Tort
  • Remediation Cost Allocation
  • Property Devaluation
  • View Lorne Everett's Consulting Profile.
    Lorne G. Everett, PhD, et al
    This compilation of selected technical papers, contains peer-reviewed papers that were presented at a symposium sponsored by ASTM International Committee D18 on Soil and Rock and Subcommittee on Groundwater and Vadose Zone Investigations.
    Lorne G. Everett, PhD, et al
    The book covers subsurface water exchange between the land and sea as well as groundwater discharge to the seas. It also provides a review of experimental methods and numerical modeling that can be used for the evaluation of specific discharge data and the effect of groundwater on the salt balance of seas and oceans.
    Lorne G. Everett, PhD, et al
    This publication provides an international perspective on one of the most complex issues in hydrology: field and laboratory measurement of low permeability and dual porosity materials. Eleven peer-reviewed papers, written by an international group of experts, focus on the development of techniques to evaluate hydraulic conductivity and remediation of fine grained and dual porosity geologic materials.
    Lorne G. Everett, PhD, et al
    Compiled by experienced practitioners, this guide covers topics such as basic principles of vadose zone hydrology and prevalent monitoring techniques. Case studies present actual field experiences for the benefit of the reader. The Handbook provides practitioners with the information they need to fully understand the principles, advantages, and limitations of the monitoring techniques that are available.
    Lorne G. Everett, PhD
    This handbook contains specific information on the application of a widely accepted groundwater monitoring methodology, which has been applied to coal and oil shale development sites.
    Lorne G. Everett, PhD
    Guidelines and Methodology for Developing and Implementing a Groundwater Quality Monitoring Program
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    James Nelson
    4601 E. Mountain View Road
    Phoenix AZ 85028
    phone: (916) 801-3962 or (602) 639-0743
    James Nelson Storm Water Expert PhotoJames H. Nelson, PE is a Hydrologist and Civil Engineer with over 35 years of emphasized experience in the water resources field. Since beginning his professional practice in 1975, Mr. Nelson has completed or supervised the completion of over 2,500 relevant projects in the field of Water Resources.

    Prior to founding Storm Water Consulting, Inc., Mr. Nelson was a member of a large multi-disciplinary consulting firm for 27 years, functioning in a variety of roles, including Chief Hydrologist, Water Resources Manager, Principal, Branch Manager and Vice President. He is a Registered Civil Engineer in the States of California, Arizona, Nevada, and Hawaii.

    Mr. Nelson has provided expert witness services in over 20 lawsuits involving Storm Drainage and Flooding, representing plaintiffs and defendants about equally.

    Areas of Expertise:
    • Storm Drainage Master Plans
    • Floodplain Mapping
    • Regulatory Requirements for Flood Hazard Areas
    • Drainage Designs for Streets and Highways
    • Joint-use Flood Control / Recreation and Environmental Enhancement Projects
  • Hydrologic and Hydraulic Studies
  • Environmental Impact Reports
  • Floodplain Assessments
  • Storm Drainage Impact Fee Analyses
  • Flood Control Studies / Designs
  • Selected Litigation Support Cases
    • Heidrick/Schultz v. City of Davis - Increased and recurring flooding of agricultural properties downstream of a recently-constructed, large residential development project and accompanying storm drainage facilities, Yolo County, California. Hydrology consultation and expert witness
    • P&S Metals v. Whitton Corporation, et. Al. - Flooding caused by a downstream landowner’s construction of a CMU wall across the floodway for the North Branch Tropicana Wash, Las Vegas, Nevada. Hydrology consultation and expert witness
    • Moniz v. State of Hawaii - Intensified flooding and destruction of a residence in Waianae, Hawaii caused by upslope grading in State lands. Hydrology consultation and preparation of initial evaluation report
    • Maricopa County v. Allied Concrete. Sand and gravel operation along Agua Fria River near Indian School Road, Phoenix, Arizona. Hydrology consultation and expert witness
    View James Nelson's Consulting Profile.