Staff
Company Officers and Principals
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Lucinda Jacobs, Ph.D.
President, Principal Aquatic Scientist -
Betsy Day
Vice President, Principal Sediment Scientist -
Larry F. Marx
Vice President of Corporate Development -
Russell E. Keenan, Ph.D.
Vice President, Principal Toxicologist -
Judi L. Durda
Vice President, Corporate Secretary, Principal Toxicologist -
David Livermore, R.G., L.H.G.
Principal Hydrogeologist -
William Locke, P.E.
Principal Hydrologist -
Randi Wexler
Principal, Regulatory Affairs -
Damian V. Preziosi
Principal Environmental Scientist -
James Lape
Principal Environmental Scientist, Human Health Risk Assessor -
Michael V. Ruby
Principal Scientist -
Steven O. Helgen
Principal Geochemist -
William Cutler, Ph.D., P.G.
Principal -
Reid M. Carscadden, P.E.
Principal Engineer -
Edward P. Conti, C.E.G., C.H.G., P.G.
Principal Geologist
Senior Managing Scientists and Engineers
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Robert Pastorok, Ph.D.
Senior Science Advisor, Ecologist -
Scott Becker, Ph.D.
Senior Managing Ecotoxicologist -
R. Dreas Nielsen
Senior Managing Marine Scientist, Quantitative Analyst -
Les Williams, Ph.D.
Senior Science Advisor, Aquatic Ecologist -
Laura Jones
Senior Managing Scientist -
Todd Martin, P.E.
Senior Managing Engineer, Hydrogeochemist -
Jennifer Sampson
Senior Managing Ecologist -
Andrew Nicholson, Ph.D.
Senior Managing Scientist -
Gene Revelas
Senior Managing Scientist -
Kenneth E. Kolm, Ph.D., P.G., P.Hg.
Senior Science Advisor -
Patrick O. Gwinn
Senior Managing Scientist -
John Samuelian, Ph.D.
Senior Managing Scientist -
Marcia Greenblatt, Ph.D., P.E.
Senior Managing Hydrologist -
Ellen S. Ebert
Senior Managing Scientist -
Ramesh Venkatakrishnan, Ph.D., P.G.
Senior Science Advisor
William Locke, P.E.
Principal Hydrologist
Mr. William Locke is a hydrologist and registered civil engineer with more than 20 years of experience in environmental investigation, fate and transport assessments, remedy analysis and selection, and regulatory affairs. He specializes in designing physical and chemical investigations of complex environmental systems, including soil, groundwater, sediments, surface water, and biota. He advises a broad range of clients on scientific and technical issues, regulatory strategy, and management of environmental assets and liabilities. Mr. Locke has led numerous CERCLA, RCRA, and state-led environmental investigations and feasibility studies, and he has provided expert support for natural resource damage assessments (NRDAs) and other environmental litigation matters.
Recent highlights of Mr. Locke’s technical practice include the evaluation of groundwater-sediment-surface water interactions at several sites across the U.S., where he has developed and successfully implemented a multiple lines-of-evidence approach for differentiating impacts of historical releases to sediments from those caused by migration of upland groundwater plumes. He is well-versed in the environmental behavior of a wide array of inorganic chemicals (e.g., cyanide, arsenic, cadmium, lead, and other metals) and organic chemicals (e.g., PCBs, dioxins, PAHs, and chlorinated solvents), and he has designed and executed technical studies to differentiate site-related releases from natural and anthropogenic background chemical concentrations in soil, water, and sediments. Mr. Locke has also developed analytical and numerical models to assess chemical fate and transport in groundwater and surface water systems, predict the effects of mining on water quality and quantity, analyze the feasibility of environmental remediation projects, and address questions related to water resources quantity and quality.
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