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Principals & Associates

Janet Knox, LG, Principal Environmental Geochemist
M.S. Geochemistry, 1983, University of Auckland
B.S. Geochemistry, 1980, Yale University
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Janet is an accomplished technical expert and project manager, bringing over 30 years of experience in the investigation and remediation of soil, sediment, surface water, groundwater, and air. A recognized leader in regulatory strategy, Janet has ushered simple and complex projects to closure, helping clients navigate federal, state, and local regulations. She has strong working relationships with agencies, focusing on the intent of regulations and identifying valid approaches to achieve that intent. She has been closely involved in every MTCA revision and worked to develop the TPH risk-based approach with the Science Advisory Board. Janet is innovative, using tools such as background and artifact studies, chemical forensics, contaminant loading calculations, remediation levels, presumptive remedies, containment, and property-specific No Further Actions. She closely evaluates site history as contamination and transport pathways strongly link to filling, paving, storage, and use. She has extensive experience in MTCA, Superfund, and Natural Resource Damage allocation, using attribution, statistics, NPDES, source, and fate and transport analyses. Janet is a responsive, clear communicator and enjoys working with large groups of stakeholders for project success.

Stephen Swope, LHG, RG, PG, Principal Hydrogeologist
M.S. Hydrology, 1990, University of Idaho
B.S. Geology, 1985, Claremont McKenna College
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For over 15 years, Steve has conducted hydrogeologic and environmental site assessments, developed water supplies, and managed multidisciplinary WRIA basin assessments — regional-scale studies of water use and availability, habitat, and water rights. He has also supervised Superfund investigations on the nature, extent, fate, and transport of contaminants. One of Steve’s specialties is developing data management systems for water resources information and statistical analysis plans for landfill monitoring. His experience also extends to the areas of groundwater modeling, wellhead protection, and expert witness / litigation support.

Peter Schwartzman, LHG, Principal Hydrogeologist
M.S. Hydrology (Hydrogeology), 1989, University of Arizona
B.A. Geology, 1984, University of Pennsylvania
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Peter has been involved in local hydrogeologic site assessments, regional groundwater resource evaluations, water supply development, and contaminant hydrology for over 20 years. His educational background in geology and hydrology is complemented by project experience in such areas as: characterization and computer modeling of groundwater flow systems; assessment of stream-aquifer interaction and saltwater intrusion; design/installation of water supply and monitoring wells; aquifer testing; stream gauging; and contaminant delineation. Peter has developed a variety of regional and local groundwater flow models, and is proficient in many computer applications to hydrogeology. He has modeled groundwater recharge based on climatic, soils and land-use factors; infiltration of recharge through the unsaturated zone; and a wide variety of saturated flow systems. In addition, he has co-instructed groundwater modeling courses and has contributed to the development of groundwater modeling software.

Glen Wallace, Ph.D., LG, Associate Geologist
Ph.D. Geological Sciences, 2004, University of Washington
M.S. Earth Science, 1999, University of California Santa Cruz
B.S. Earth Science, 1997, University of California Santa Cruz
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Glen has 15 years of experience in geology including consulting and academic experience. Glen has experience in contaminated site investigation and remedial design, contaminant fate and transport, groundwater modeling, monitoring well design and installation, structural geologic analysis, file review in support of legal action and expert witness testimony, environmental site assessment, landfill environmental monitoring and corrective action, and database management.

Dawn Chapel, Associate Hydrogeologist, LG, LHG
M.S. Geology, 2000, University of Wisconsin-Madison
B.A. Geology, 1998, Smith College-Massachusetts
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Dawn has over 15 years experience in hydrogeologic and water resources investigations. Ms. Chapel has extensive experience developing groundwater and contaminant transport computer models. She has successfully applied her modeling expertise to evaluate and quantify a number of groundwater problems: groundwater flux and flow paths; contaminant migration paths; delineation of recharge areas for wellhead protection programs; investigation of groundwater and surface water interactions; evaluation of aquifer storage and recovery; and groundwater impacts from proposed infiltration facilities. Ms Chapel also has considerable experience working on environmental sites, including assessment of sites contaminated with chlorinated solvents, state regulated landfills, and numerous sites regulated under MTCA. She has developed numerous remedial investigation plans and sampling and analysis plans for a variety of sites in accordance with regulatory requirements. Her field experience includes well installation and logging, soil and water sampling, aquifer pump tests, borehole geophysical logging, stream gaging, and geologic mapping. Ms. Chapel also works with spatial data in a Geographic Information System (GIS) and applying GIS to her investigations.