I hear that folks on the internet are asking this question. (Well, actually I hear that they are criticising it for not being run like one.) Here’s the answer: It is not a Title IX investigation. People seeking a Title IX investigation should contact the Office of Civil Rights. The site visit program uses a different methodology, that which the Physics Association has been using since 1990. Here’s information about this program.
And here’s a list of all the Physics Departments that have had site visits.