BIOSCREEN

Screening model which simulates remediation through natural attenuation of dissolved hydrocarbons at petroleum fuel release sites

Version 1.4 - July 1997

BIOSCREEN is a screening model which simulates remediation through natural attenuation of dissolved hydrocarbons at petroleum fuel release sites. The 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. Includes three different model types: (1) solute transport without decay, (2) solute transport with biodegradation modeled as a first-order decay process (simple, lumped-parameter approach), and (3) solute transport with biodegradation modeled as an instantaneous biodegradation reaction with multiple soluble electron acceptors including dissolved oxygen, nitrate, and sulfate. The model is designed to simulate biodegradation by both aerobic and anaerobic reactions.

System Requirements

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

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

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 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.

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Developer: EPA