The tape can be found in Morgantown by entering the apartment building attached to Stash Room M-3 (immediately north of the Vault-Tec University campus) via the hole in the wall to the right of the terminal, then exiting through the hole above the one that the player character has entered on the monorail level, and walking to the next rooftop via the wooden plank bridges. It will be on the metal duct to the left of the shack on the roof.
Alisha Parker: Without RadAway, the effects of intense radiation were already taking their toll. Kids were falling over dead, their hair and skin were falling off. Only the most powerful student houses were able to keep order among their ranks. This was only possible by eradicating the smaller groups of student survivors and stealing their supplies. Every dose of RadAway kept the powerful elite at the top of the food chain. Even now, I'm in hiding. On a roof somewhere far away from most of the other kids. There's one guy on the roof next over that I sometimes talk to, but we usually keep to ourselves to not attract attention. I think his name is Victor.