For the first resubmittal on a supercharger, generally a month or two. It depends on how extensive the required revisions are. The thing you have to remember is that the engineering support isn't just working on this one location/project. The same team will have multiple locations, all in different stages of development, being worked on at the same time. While the actual time needed to do the work for this one permit might relatively short, that work still needs to be fit into their existing schedule.