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FOOTPRINT
Version 1.0 - June 2008
| Description System Requirements Downloads: Installation and Start-Up Technical Support |
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Important Information
Discussion of Domenico Approximation Used in BIOCHLOR, BIOSCREEN, FOOTPRINT, and REMChlor Models
Description Back to Top
FOOTPRINT is a simple and user-friendly screening model used to estimate the length and surface area of benzene, toluene, ethylbenzene, and xylene (BTEX) plumes in ground water, produced from a spill of gasoline that contains ethanol. Ethanol has a potential negative impact on the natural biodegradation of BTEX compounds in ground water. The primary objective of the software is to predict the increase in surface area of the plume of BTEX compounds or any other chemical of concern (COC) due to the presence of ethanol in ground water. FOOTPRINT estimates the area of a plume of particular BTEX compounds that are contained within two biodegradation zones: 1) a zone that is immediately adjacent to the source, where ethanol is present in high concentration and no biodegradation of the BTEX compounds (or other COC) is allowed, and 2) a second zone, where the ethanol concentration is negligible due to the natural biodegradation of ethanol in the first zone and biodegradation of the BTEX compound (or other COC) contributes to attenuation in concentration of the BTEX compounds. FOOTPRINT is based on the modified version of the Domenico model (1987) published by Martin-Hayden and Robbins (1997). This model is an approximate analytical solution of the advective-dispersive solute transport equation with first-order decay. The model of Martin-Hayden and Robbins (1997) was further modified in FOOTPRINT to allow zero-order decay as well (see Appendix B of the user’s manual for details). As a result, FOOTPRINT can independently describe the natural biodegradation of ethanol and/or the BTEX compound with either a zero-order rate constant or a first-order constant. FOOTPRINT can also be used to estimate the surface area of the plume and the concentration at any given point within the plume when the COC is decaying at a constant rate (first- or zero-order) in the absence of ethanol.
Minimum System Requirements Back to Top
To run FOOTPRINT, you will need the following:
IBM PC/AT or compatible
Windows 98 or higher
Microsoft .Net Framework
Microsoft Excel
Installation and Start-Up: Back to Top
Getting Started:
You will need Adobe Reader to view some of the files on this page.
See EPA's PDF page to learn more.
Installing the Program:
There is one file to download to install FOOTPRINT:
- FOOTPRINTsetup.exe (3.1 MB)
- Download the FOOTPRINTsetup.exe file onto your hard drive.
- Run the FOOTPRINTsetup.exe file. You will be guided through the installation process.
The FOOTPRINT User's Manual (PDF) (45pp, 385 KB, About PDF) comes with the installation and is accessible from within the program.