Chemical Screening Tool For Exposures & Environmental Releases I OPPT I OPPTS I US. . . PRgI 1 of 2 

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You are here : EPA Home Prevention, Pesticides & Toxic Substances Pollution Prevention & 

Toxics Exposure Assessment Tools and Models Chemical Screening Tool For Exposures & 

Environmental Releases 

Chemical Screening Tool For Exposures & Environmental Releases 

What Does ChemSTEER Do ? 

. Estimates occupational inhalation and dermal exposure to a chemical during industrial and 

commercial manufacturing, processing, and use operations involving the chemical . 

. Estimates releases of a chemical to air, water, and land that are associated with industrial 

and commercial manufacturing, processing, and use of the chemical . 

How Does ChemSTEER Work ? 

. Allows users to select predefined industry-specific or chemical functional use-specific 

profiles or user-defined manufacturing, processing and use operations . Using these 

operations and several chemical-specific and case-specific parameters and general models, 

the ChemSTEER computer program estimates releases and occupational exposures . The 

methods in ChemSTEER were developed by the EPA Office of Pollution Prevention and Toxics 

(OPPT) ; Economics, Exposure, and Technology Division ; Chemical Engineering Branch . 

What Do I Need to Use ChemSTEER ? 

. Understanding of processes (for operations without industry-specific data) and of 

ChemSTEER methods (in HELP screens) . 

. Data and information on a chemical's : 

. Physical-chemical properties, including molecular weight, vapor pressure, and density . 

. Production or use volume, and if applicable, fractions devoted to multiple uses. 

. Weight fractions and physical states . 

. Case-specific parameters, when available : 

. Numbers of sites, operating days, and workers; batch amounts and durations . 

. Release sources and worker activities . 

. Workplace concentrations and release amounts and media . 

. Types and sizes of containers used to transport the chemical or mixture . 

How Are ChemSTEER Data Used ? 

. EPA's OPPT uses ChemSTEER methods in screening new and existing chemicals for the 

potential risk they may pose to workers and the environment. 

. ChemSTEER outputs can be used to identify potential pollution prevention and exposure 

reduction opportunities . 

What Type of Computer System Do I Need ? 

. Processor - mid-range Pentium or higher is recommended . 

. Memory - 64 MB or more recommended (or minimum recommended for your version of 

Windows) . 

. Hard disc space - 50 MB required . 

. Operating system - Windows 98 or higher. 

. Monitor resolution - 800 x 600 or higher . 

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What Is ChemSTEER's Status and Availability ? 

The May 2004 beta version of ChemSTEER is available . This beta was developed primarily for 

producing internal EPA reports on workplace releases and exposures . EPA has significantly 

improved reliability, transparency, clarity, completeness, and flexibility relative to the 

previous draft prototype, and these improvements continue the programming effort toward 

making ChemSTEER more user-friendly for non-EPA users. This beta version of ChemSTEER 

can be downloaded and installed using Download ChemSTEER. 

This beta version contains 34 models, which includes a complete set of models routinely used 

by EPA in the absence of data for workplace release and exposure assessment . This beta 

version also includes four industry-specific operations and a complete Help System with a full 

set of references. 

Updates to this beta version are planned to improve flexibility and versatility of model use 

and to include more of the 60 industry-specific operations (also called generic scenarios) for 

which data have been developed . These generic scenarios are documented in the Chemical 

Engineering Branch Compilation of Generic Scenarios, 1997, which is available as a zip file in 

the Human And Environmental Exposure Assessment Documents section of Exposure 

Assessment Guidance page . 

ChemSTEER Questions/Answers 

ChemSTEER Overview and Tutorial Sl ide Shows 

Who Can I Call for More Information ? 

For more information about the tool, contact : 

Jay Jon 

U .S . Environmental Protection Agency, Mail Code 7406M 

1200 Pennsylvania Avenue N .W . 

Washington, DC 20460 

Phone # (202) 564-8518 

E-mail : Jay Jon 

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