I would ask them to find your peak before competing. Most shops charge like $5 for an extra or pre-run. Run a sweep to find your peak, then run your peak tone when you compete.
Just a note too, your peak changes when you open the door, so keep that in mind that you may have to run a couple sweeps at the same volume, one with door open, one closed, and take the higher SPL of the two to use as your burp in the respective orientation.