chemsteer chem ical s creening t ool for e xposures & e nvironmental r eleases
DESCRIPTION
ChemSTEER Chem ical S creening T ool for E xposures & E nvironmental R eleases. Scott Prothero US EPA AIHCE May 25, 2000. What Will You Learn Today?. Background / Context Computer Requirements Premises / Methods Inputs / Outputs Applications Status / Availability. - PowerPoint PPT PresentationTRANSCRIPT
ChemSTEERChemical Screening Tool for Exposures & Environmental
Releases
Scott Prothero
US EPA
AIHCE
May 25, 2000
What Will You Learn Today?
Background / Context Computer Requirements Premises / Methods Inputs / Outputs Applications Status / Availability
What does ChemSTEER do?
In the absence of exposure data…
Estimates potential inhalation, dermal exposures to workers Estimates potential releases to air, water, land
... for a chemical in industrial and commercial operations.
Why Did EPA Develop ChemSTEER?
Initially developed for use in EPA New Chemicals Program risk screening process
Computerizes established methods and models
Tool for non-EPA use
What Do You Need to Run ChemSTEER?
Technical info and data on chemical and operation(s)
Understanding of methods
IBM- compatible computer 10 MB storage, 16 MB RAM
Windows 95 or newer
How Do You Use ChemSTEER?
Choose Operations
Input Data on Chemical
Input Site Data and Info
Choose default models and parameters or other options
What Methods Are in ChemSTEER? Vapor Generation Models for filling, open pools of liquid “Box Model” for Inhalation Dermal models Container/ equip. residuals
Non-ideal behavior Established exposure limits Industry- specific “generic scenarios”
Current
Future
What Are Some Example Inputs?
Volume Handled or Produced Operation Types (Uses) Molecular Weight, Vapor Pressure Weight Fractions Numbers of Sites, Workers Release Sources/Worker Activities Ventilation Rates Container Volumes
What Are Some Example Outputs?
Exposures LADD & mg/day inhaled, available for absorption through skin
Releases kg/day, kg/year to air, water, land, incineration
What Are Its Applications? Prevent Pollution / Reduce Exposure & Risk
Identify & Prioritize Process “Problems” (esp. pre-design)
Examine Tradeoffs: Occupational & Non-occupational Impacts
Link to E-FAST: Tool for Non-occupational Exposures beyond Plant Boundaries
What is Its Status & Availability?
Use now for Demos only User-defined operations only
Release Goal: Summer 2000 Add industry-specific operations, methods, user manual, user friendliness, peer review in 2000-01
EPA Exposure Homepage: www.epa.gov/opptintr/exposure
General info on ChemSTEER and other tools related to human and environmental exposures, fate, and risks Describes the exposure assessment process Download available tools