STEPHEN G. ZEMBA, Ph.D., P.E.

Education:

1989.   Ph.D., Mechanical Engineering. Massachusetts Institute of Technology.  

1985.   M.S., Mechanical Engineering. Massachusetts Institute of Technology.  

1983.   B.S. with University Honors, Mechanical Engineering. Carnegie-Mellon University.

Professional Experience:

1989–Present. Senior Engineer, Cambridge Environmental Inc.

1992–Present. Adjunct Professor, University of Massachusetts–Lowell.

1995–Present. Adjunct Professor, Tufts University.

1995–Present. Registered Professional Engineer, Commonwealth of Massachusetts.

Selected Project Experience:

Conducted numerous risk characterizations of hazardous waste disposal sites in accordance with the original and revised Massachusetts Contingency Plans.

Developed risk assessments of contaminant releases to air, groundwater, and surface water associated with landfills in Massachusetts and New Hampshire.

Developed fate-and-transport models to assess groundwater contaminant volatilization into open trenches and indoor air environments.

Assessed health risk issues associated with emissions from proposed and existing asphalt plants, including critical evaluation of fugitive vapor emissions.

Performed air dispersion analyses of air toxics releases using conventional gaussian plume models, dense gas dispersion models, and other methods.

Performed multi-pathway risk assessments of stack emissions existing and proposed waste-to-energy plant in Akron, Ohio, East Bridgewater, Massachusetts and Green Island, New York, and a hazardous waste incinerator in Harriman, New York.

Analyzed and assessed ecological risks for a PCB-contaminated marsh on behalf of potentially responsible parties, and assisted a citizens’ group in providing input to EPA.

Conducted original research in the fields of acid rain, ground-level ozone transport, ocean disposal of carbon dioxide, and dispersion of dense (heavier-than-air) gases

Created user-friendly modeling tools for modeling time-dependent pollutant concentrations in indoor air.

Teach graduate-level courses in Air Quality Modeling and Air Pollution.

Researched atmospheric deposition of nitrogen-containing compounds, mercury, and polycyclic aromatic hydrocarbons to the Massachusetts Bays.

Publications and Reports:

A list of publications and reports will be provided upon request, and is also available at our web site (www.cambridgeenvironmental.com).