TRJ Environmental

Jill Warnasch Mozier


  • B.S., Civil Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA: Graduated Magna Cum Laude, fourth in CE class. 1990.
  • M.A., Liberal Studies, Duke University, Durham, N.C. 1995.


  • Engineer-in-Training, Virginia, 1990.

Employment History

1995 - Present
TRJ Environmental, Inc., Chapel Hill, NC: Environmental Engineer responsible for conducting literature surveys designed to improve inputs to air pollution models. Surveys summarize current research pertaining to indoor and outdoor microenvironmental concentrations, sensitive subpopulations, indoor emission rates, personal exposures, as well as relevant regulatory approaches for a variety of contaminants of concern.
1993 - 1997
IT Corporation, Durham, NC: Environmental Engineer focused on improving and enhancing various EPA exposure models via input and output data acquisition, analysis, and summary. Worked closely with EPA researchers on the probabilistic version of the NAAQS (pNEM) exposure model as applied to ozone and the hazardous air pollutant exposure model as applied to mobile source pollutants (HAPEM-MS), as well the early research stages of the total risk integrated model (TRIM).
1991 - 1993
ENVIRON Corporation, Princeton, NJ: Environmental Engineer responsible for assisting in the soil and groundwater remediation of various contaminated industrial sites under the Superfund and other programs for clients including governing municipalities and private industries.
1990 - 1991
Information Support Systems Laboratory, Blacksburg, VA: Research Assistant responsible for digitizing surface water features from US Geological Survey maps.
CFM Associates, Branchburg, NJ: Assistant Engineer focused primarily on preparing the documentation necessary for wastewater treatment system permit applications.

Professional Qualifications

Ms. Mozier, currently an environmental engineer and analyst, joined TRJ Environmental Incorporated in October of 1995. Prior to this date she and Mr. Ted Johnson, the founder of TRJ, worked closely together for International Technology Corporation's Air Quality Services Division. Her training includes education as a civil engineer and experience as an environmental engineer dealing with a variety of air quality, soil, surface and ground water concerns, with an emphasis on air pollutant exposure modeling. She has experience in the design, implementation, and analysis of personal exposure monitoring studies, including the development and use of microenvironmental pollutant levels and human activity data bases. Her work has focused on enhancements to EPA's probabilistic version of the NAAQS (pNEM) exposure model, as applied to ozone, and EPA's Hazardous Air Pollutant Exposure Model, as applied to mobile source pollutants (HAPEM-MS). Related to EPA’s rule-making procedure, Ms. Mozier reviewed and summarized EPA guidance and background technical memorandums concerning the establishment of maximum achievable control technology (MACT) standards. Ms. Mozier was also heavily involved in the research phase of the development of EPA's Total Risk Integrated Model (TRIM). Her TRIM work primarily included reviewing and recommending multi-media models, approaches, and databases for use in assessing non-inhalation risks to both humans and ecosystems. More recently, Ms. Mozier has conducted a series of literature surveys relevant to air pollution modeling in various indoor and outdoor microenvironments. One of her literature surveys provided data useful in characterizing the time a child spends outdoors with a high ventilation rate, and to provide personal monitoring data that could be related to energy expenditure, oxygen uptake rate, and/or ventilation rate. She also conducted a literature survey pertaining to the effects of tropospheric ozone and particulates on ultraviolet-B radiation. Most recently, Ms. Mozier conducted a literature survey pertaining to indoor emissions of benzene, formaldehyde, PCE, and TCE. Ms. Mozier has worked on air pollutant exposure projects funded by EPA's Office of Air Quality Planning and Standards (OAQPS) and the Atmospheric Research and Exposure Assessment Laboratory (AREAL), as well as the Environmental and Occupational Health Sciences Institute (EOHSI), the International Life Sciences Institute (ILSI), the American Petroleum Institute (API), Health Canada, and RTI International.

Selected Publications

(See Publications Section for Complete Listing)

Ted Johnson, J. Capel, Jill Mozier, and M. McCoy. Estimation of Ozone Exposures Experienced by Outdoor Children in Nine Urban Areas Using a Probabilistic Version of NEM, prepared for the Air Quality Management Division of the USEPA under Contract No. 63-D-30094, August 1995.

Ted Johnson, Jill Mozier, and M. Weaver. Personal Exposure of Service Station Personnel to Oxygenated Fuel Compounds, American Petroleum Institute, December 1996.

Ted Johnson, Jill Mozier, M. McCoy, J. Capel, and M. Riley. Developmental Research for the Hazardous Air Pollutant Exposure Model (HAPEM) as Applied to Mobile Source Pollutants, prepared for the Human Exposure and Field Research Division under Contract 63-D-30094, February 1996.

Jill Mozier. Descriptions of Diaries Used in Selected Studies that Collected Time/Activity and/or Energy Expenditure Data. Prepared under U.S. Environmental Protection Agency under EPA STAR Grant No. RD-83154101-0, January 14, 2005.

Jill Mozier. Overview and Key Features of the Integrated Spatial Multimedia Compartmental Model (ISMCM) -- An Addendum to Evaluation of Existing Approaches for Assessing Non-Inhalation Exposure and Risk With Recommendations for Implementing T.R.I.M., prepared for the Office of Air Quality Planning and Standards of the USEPA under Contract No. 68-D-30094, April 1997.

Jill Mozier. Results of a Literature Survey Regarding UV-B and Its Relation to Tropospheric Ozone, Aerosols, and Particulates and Related Health Issues, American Petroleum Institute, April 21, 2003.

Jill Mozier and Ted R. Johnson. Evaluation of Existing Approaches for Assessing Non-Inhalation Exposure and Risk With Recommendations for Implementing T.R.I.M., prepared for the Office of Air Quality Planning and Standards of the USEPA under Contract No. 68-D-30094, April 1996.

S. J. Washburn, Jill Warnasch Mozier, and R. Harris. Risk Assessment in the Remediation of Hazardous Waste Sites - a Case Study in the Use of Monte Carlo Techniques. Handbook of Bioremediation. Trantolo and Wise, eds, Marcel Dekker, Publishers, 1992.