Jonathan Loeffler, LG – Project Geologist

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Jonathan is a licensed geologist with professional experience in a wide variety of technical and task management roles. His areas of expertise include environmental subsurface investigations, geotechnical and environmental drilling oversight, geophysical surveying, groundwater monitoring, remedial excavation oversight, project planning coordination, and technical report writing. He enjoys occasionally kayaking to work!

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Chris Cass, LG – Senior Geologist

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Chris is a licensed geologist with extensive experience in subsurface contaminant investigations, environmental due diligence, and environmental cleanups and monitoring. He has provided client services in the areas of field support for environmental cleanup activities, groundwater and surface water studies and monitoring, and Phase I and Phase II Environmental Site Assessments. Chris also has experience coordinating with regulatory agencies to attain closure for cleanup sites.

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Tom Cammarata, LG, LHG – Principal Geochemist


Tom is a licensed geologist and hydrogeologist in Washington State with an advanced degree in the field of Geochemistry. He has extensive experience in environmental consulting includes evaluating freshwater and marine sediment quality under the SMS, performing aquifer testing, conducting natural attenuation studies, performing statistical analyses, modeling the fate and transport chemicals in soil, air, and water, conducting forensic studies, and providing expert witness services. Tom also has considerable experience in the regulatory closure of facilities under MTCA. Tom is bilingual with Arabic as his second language.

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Ryan Bixby, LG – Managing Principal

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Ryan has experience working on complex environmental projects and is a registered professional geologist specializing in due diligence and solutions for a variety of environmental problems. He has completed hundreds of Phase I and Phase II Environmental Site Assessments (ESAs), including more than 500 Phase I ESAs alone. Ryan has managed the evaluation of contamination sources and the extent of contamination associated with current and historical land uses on numerous remediation projects. He has worked closely with local, state, regulatory agencies to receive site closure and No Further Actions through the Voluntary Cleanup Program and Ecology’s formal programs. In addition, Ryan has provided litigation support to assign and direct cost recovery efforts for clients under the Washington State Model Toxics Control Act.

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Environmental Hydrogeology

Hydrogeology is relevant to nearly every service SoundEarth provides. Our hydrogeologists develop and interpret data to perform a range of services, such as dewatering analysis, settling during construction, thermal monitoring in sensitive receptors (trout streams), sophisticated numerical modeling and statistical analysis, and pinpointing the technical and regulatory issues for groundwater quality.

Our tools include the latest in geographic information and web-based data systems, including a suite of data interpretation products, ranging from ESRI’s Spatial Analyst to Rockworks. We also use geospatial data statistics to evaluate existing site information and identify remaining data gaps.

Modeling and assessing fate and transport of chemicals is a core expertise at SoundEarth. After gathering field data, we use software tools to characterize the hydrogeological conditions at contaminated sites and quantify environmental impacts to soil, air, and water. These software tools include our own models of chemical and groundwater fate and transport, as well as public domain codes such as ATRANS and MT3DMS (to simulate advection, dispersion, and chemical reactions of dissolved constituents and to develop 3-D solutions to transport), the USEPA’s HELP model (for use in landfill design and to predict leachate production), and Johnson-Ettinger’s indoor air model (to estimate vapor intrusion into buildings).