Sullivan Environmental

Sullivan Environmental Consulting, INC. provides air quality modeling services to various industries and government agencies. Located in the DC area, Sullivan Environmental provides a wide range of air quality consulting services nationwide and in some cases internationally. Specialization includes the development of innovative modeling methods / software, accident / emergency analysis, Monte Carlo modeling methods. The firm has extensive experience in urban-scale modeling in urban-scale modeling in the U.S. and Eastern Europe. Sullivan Environmental, located in Alexandria, Virginia, is in its 15th year of operation.

Company details

1900 Elkin St., Ste 240 , Alexandria , VA 22308 USA

Locations Served

Our Manufacturers

Business Type:
Service provider
Industry Type:
Air and Climate
Market Focus:
Nationally (across the country)

Sullivan Environmental offers the stability of a firm that has enjoyed profitable operations for 19 of 20 completed years of operation. We have been located at the same address and phone number since 1988, and will be here to meet your needs in the future. Operating as a small, specialty contractor in the niche area of exposures to toxic air pollutants, our company provides clients with the security using highly experienced analysts. Certified Consulting Meteorologists David Sullivan and Dennis Hlinka have over 50 years of combined professional experience, and have managed many of the U.S. Environmental Protection Agency’s largest studies of toxic air pollution in the U.S. and in Eastern Europe.

Incorporated in 1985 as a Virginia Corporation, Sullivan Environmental opened its doors for business in January 1987. From 1987 through the present time, the firm has been located at 1900 Elkin Street, Alexandria, VA 22308. This location is approximately one-half hour from the nation’s capitol.

During the 1980s and early 1990s, Sullivan Environmental served primarily as an EPA contractor. Our staff was responsible for managing and conducting approximately 10 urban-scale air quality studies, with 8 of these studies in U.S. metropolitan areas and 3 studies in Eastern Europe (Russia, Czech Republic, and Poland).

In 1987 – 1988, the staff of Sullivan Environmental provided extensive modeling support to the EPA Office of Solid Waste. This project was focused on evaluating exposures to metal releases from incineration. Modeling was conducted in 30 areas throughout the U.S. and methodology was developed to support EPA’s efforts in this area.

In 1989 during the EPA Kanawha Valley Study of Air Toxics, Sullivan Environmental developed the first prototype version of what eventually was named the EPA TOXST model, which employed Monte Carlo methods to more realistically model acute exposures in a heavily industrialized valley. This was a follow-up to the work of David Sullivan and Dennis Hlinka while employed at Versar, Inc. in the mid 1980s. The preceding study was initiated by the EPA Administrator, Lee Thomas, subsequent to the Bhopal tragedy in India. The primary area of review was cancer risk assessment associated with the major chemical industries in the Kanawha Valley of West Virginia (Charleston area).

During the mid 1990s, Sullivan Environmental was retained by Allegheny County, Pennsylvania (Pittsburgh), to provide assistance in the development of a State Implementation Plan (SIP) for coke oven operations in Allegheny County. Support included conducting meteorological studies, software development, and modeling assistance. The SIP was approved as the first model-based SIP for coke oven operations in the U.S.

In 1993, Sullivan Environmental developed the current version of the EPA TOXST model. Our firm was retained by EPA after developing a successful prototype under contract to a major chemical manufacturing organization. This model provides the opportunity to reduce the degree of conservatism when modeling short-term exposures to air toxics from sources that emit on a variable or infrequent basis. The new EPA model AERMOD has a link to create output to run with TOXST.

Starting in 1991, Sullivan Environmental has been providing expert witness depositions and in-court testimony for a wide range of cases involving exposures to toxic air pollution (class action and individual cases), odor / nuisance cases involving air pollution, as well as wrongful death and damage cases associated with meteorological events such as wind-induced injuries, tornado damage, slip-fall, visibility impairment (criminal and civil cases), etc.

From 1997 to the present time, the firm has been heavily involved with evaluating and managing exposures associated with pesticide use in the agricultural setting. Our staff has been conducting numerous large scale field studies that are composed of air sampling, meteorological sampling and analysis, air modeling analyses, and evaluating measures to reduce exposures from the application of the fumigants metam-sodium, chloropicrin, DMDS, and others. This work has resulted in the identification of methods to substantially reduce off-gassing rates and exposures for the major alternatives to replace the widely used methyl bromide fumigant which was phased out by the year 2005 as an ozone depleting substance.

Sullivan Environmental has provided modeling support to support air quality permits involving the chemical industry, hazardous waste incineration, a municipal incinerator, the cement industry, paint industry, iron & steel, smelters, mobile source-related impacts for major development projects, indirect exposure assessment for incineration impacts, and exposure assessment for numerous pesticide products. Permits included air quality permits to construct, Prevention of Significant Deterioration, indirect exposures, and permits involving hazardous waste incineration.

Throughout the operation of the company, David Sullivan has served as an expert witness for litigation, public hearings, workshops, and has delivered over 50 technical papers at technical conferences. In this context, Sullivan Environmental can provide both technical analysis and the effective communication of results by a widely recognized expert in the field of exposures to toxic air pollutants.