BIOSCREEN

Important Information

Potential Limitations of the Domenico-based Fate and Transport Models

Description

BIOSCREEN is a screening model that simulates remediation through natural attenuation of dissolved hydrocarbons at petroleum fuel release sites. The model is designed to simulate biodegradation by both aerobic and anaerobic reactions.

This software, programmed in the Microsoft Excel spreadsheet environment and based on the Domenico analytical solute transport model, has the ability to simulate advection, dispersion, adsorption, and aerobic decay, as well as anaerobic reactions that have been shown to be the dominant biodegradation processes at many petroleum release sites. BIOSCREEN includes three different model types:

Solute transport without decay
Solute transport with biodegradation modeled as a first-order decay process (simple, lumped-parameter approach)
Solute transport with biodegradation modeled as an instantaneous biodegradation reaction with multiple soluble electron acceptors including dissolved oxygen, nitrate, and sulfate

Specifications

Version	1.4
Release Date	July 1997
Development Status	general release
Development Information
Operating System	Windows 95/98/NT, Excel
Development Language
Intended Audience
Key Words
Related Web Sites

Minimum System Requirements

Any computer system capable of running Microsoft Excel version 5.0 or later will be able to run BIOSCREEN. However, because of the intensive floating point calculations used in the model, GSI recommends that the following minimum requirements be observed to ensure a minimum standard of performance:

Hardware Requirements

An Intel 486 CPU, operating at 50 MHz or faster
8 MB Random Access Memory (16 MB or more will improve performance)
1 MB free hard drive space (for BIOSCREEN only - Excel will require substantially more)

Software Requirements

BIOSCREEN is designed to be run under Microsoft Excel. Your system must have Excel version 5.0 or later properly installed.
BIOSCREEN has been tested on Excel version 5.0 for Windows on systems running Windows 3.1, Windows for Workgroups 3.11, Windows 95, and Windows NT Version 3.51; Excel version 7.0 on Windows 95 and Windows NT 3.51; and Excel 97 on Windows NT Version 3.51. BIOSCREEN runs equally well under all of these configurations. BIOSCREEN also runs well on Power Macintosh (and compatibles) running Excel version 5.0 for Macintosh.

Downloads

Installation program, help files, and instructions (ZIP)(1.3 MB)

BIOSCREEN, Natural Attenuation Decision Support System – User’s Manual, Version 1.3 (PDF) (100 pp, 1.18 MB) (EPA/600/R-96/087) August 1996

Refer to the user's manual for further instructions.
Go to Windows Explorer and create a directory named BIOSCREEN.
Download the user’s manual and BIOSCRN.EXE to the new BIOSCREEN directory.
Run the installation program by selecting Run from the File menu in Program Manager or by double-clicking on the file Installation Program in File Manager (Windows 95/98 Explorer).
The installation process creates the C:\BIOSCRN directory on your hard drive and copies essential files to that directory.
To run BIOSCREEN after installation, start Microsoft Excel and open the BIOSCRN.XLS file. Loading from within Excel is preferred to double-clicking the file name in file manager.

You will need Adobe Reader to view some of the files on this page. See EPA's PDF page to learn more.

Office of Research & Development | National Risk Management Research Laboratory