We've made some changes to EPA.gov. If the information you are looking for is not here, you may be able to find it on the EPA Web Archive or the January 19, 2017 Web Snapshot.

Walkthrough to Install and Operate the Hydrologic Evaluation of Landfill Performance (HELP) Model v3.07

HELP v3.07 is a DOS executable program, meaning it does not run in a Windows or iOS environment. The 16-bit program will not natively work with 64-bit systems (i.e., most Windows 7 and more recent systems). Therefore, a 3rd party emulator is required. This walkthrough will describe how to use a DOS emulator to install the HELP model. HELP v3.07 will run natively on 32-bit systems, through the Windows Command line. For 32-bit systems, unzip the program and double-click INSTALL.exe, following the walkthrough from Step 7. To check if your PC is 32 or 64-bit, navigate to the Start menu (may be a Windows icon), Click Computer, Click System Properties (or similar). A window with your Windows Edition and System Information will appear. System type will display either 32 or 64-bit Operating System.

You may need Adobe Reader to view files on this page. See EPA’s About PDF page to learn more.