I think it's still Bldg E1 for the base but someone will have to confirm...
DO NOT wear a skirt to clear in!! OK, I'm a girl, reported into Pet in 91 from Halifax (back when we still did it in DEUs), wore my skirt. BIG mistake, I had the SSF RSM yelling at me not 10 seconds after I walked in the door to HQ to clear. "What trade are you %&%!!" Well here you are a soldier first, a Sup Tech second and a $^$% woman LAST!!" "Do you understand me Pte?" I gave the NATO standard response of course.
By the time my sponser from my Unit showed up to take me over to the 2nd Circus, my new CSM had already been notified that I had 3 extras coming to me. Welcome to Pet I thought, but hey...it did manage to 'scare the Army' right into me!
Good luck in Pet, you'll enjoy it. I had a blast (and obviously racked up a 'few' extras). I miss it there.