HEC-ResSim Water Quality User's Manual - Working Draft for Review 11. Mass Injections Current: Mass Injection Dataset Editor PDF Download PDF Download page Mass Injection Dataset Editor. Current page Include child pages All pages Mass Injection Dataset Editor To open the Mass Injection Set Editor, follow these steps:From the ResSim main window, navigate to the Water Quality module.In the Water Quality menu, click on Mass Injections.This will open the Mass Injection Set Editor (Mass Injection Set Editor – Mass Injection Set Menu Commands).Mass Injection Set Editor – Mass Injection Set Menu Commands ×