Mandy Tulich, P.G.
Heather M. Summers
Erin Palko, P.G., LSRP
Ms. Erin Palko is a licensed geologist and site remediation professional with 20 years of consulting experience in the environmental field. Her primary focus is on soil and groundwater investigations and remediation, work at active chemical and manufacturing industrial sites, due diligence, and site investigation and remediation.
Manon Tanner-Dave
Craig Hutchings
Lisa Tolbert, E.I.T.
Steven O. Helgen
Mr. Steve Helgen is a consultant specializing in geochemistry, hydrogeology, and environmental forensics. He has more than 20 years of experience in contaminant fate and transport, geochemical fingerprinting, and apportionment in complex, multiparty environmental disputes involving sediments, groundwater, and industrial facilities. Mr. Helgen has provided expert testimony in both state and federal courts.
Judi L. Durda
Ms. Judi Durda is a toxicologist and ecologist with more than 30 years of experience in the health and environmental science fields, working on behalf of both government and private clients. She specializes in using science and science-based strategies to resolve issues related to the manufacture, use, or disposal of chemicals, consumer products, pharmaceuticals, and hazardous and nonhazardous wastes.
Russell E. Keenan, Ph.D.
Dr. Russ Keenan is a toxicologist with 25 years of experience specializing in chemical risk assessment focused on the potential human health and ecological risk of organic and inorganic chemicals and on time-dependent probabilistic risk assessment methods. He directs a team of scientists in evaluating risks associated with chemical exposures at a number of sites involving multiple exposure pathways.
Silvia Gianetti Barber
Patrick O. Gwinn
Mr. Patrick Gwinn has more than 25 years of experience applying his expertise in human health and ecological risk assessment, water quality, fate and transport dispersion modeling, product stewardship, air toxics sampling, and hazardous waste management. He has been instrumental in developing and leading projects aimed at establishing site-specific ambient water quality criteria and pollutant discharge limits.
Marcia Greenblatt, Ph.D., P.E.
Dr. Marcia Greenblatt is a water resources engineer with nearly 20 years of specialized experience in hydrodynamic, water quality, and sediment investigations. She has extensive involvement in CERCLA remedial investigations and feasibility studies at large sediment sites. Her responsibilities have included design of sediment, water column, and bathymetric data collection programs and field sampling plans.
Andrew Nicholson, Ph.D.
Avram Frankel, P.E.
Mr. Avram Frankel is a program manager with nearly 30 years of experience working on a wide range of commercial/industrial, municipal, state, and federal sites regulated under a variety of regulatory programs. Licensed in four states, he provides clients with strategic management and technical analysis of due diligence, redevelopment, technology evaluation, remediation, and litigation matters.
Bridgette R. DeShields
Ms. Bridgette DeShields has 27 years of experience and is a specialist in regulatory strategy, site investigation, site remediation, sediment and water quality management, and environmental toxicology. She has managed programs ranging from large site investigations to screening and quantitative ecological and human health risk assessments.
