1120 SW 5th Ave, Suite 613, Portland, OR 97204
The Presumptive Approach Calculator (PAC) has been rewritten to reflect the changes in the 2020 SWMM. It is available in a BETA form “test harness." It is an executable file with associated program files. In this form, reviewers may test facility configuration and sizing changes. The BETA version does not include the web interface or reporting functions currently available with the online PAC. These additional components will be completed before the SWMM goes into effect in fall 2020.
The technical background for the PAC is located in Appendix A.
Informational presentations on May 26 and 27 gave an overview of the changes to the PAC.