Third pass complete. Three layers of heavy-duty foil, standard fold, held the ambient RF flat at baseline for forty minutes, then a spike at 2.41GHz lasting eleven seconds, source undetermined, recurring on the half-hour.
Store-brand foil users: your single layer will not hold past twenty minutes in a structure this size. I have said this before. I will say it again in the report.
Classification, pending: not a haunting in the residual-emotional sense — no cold spots, no reported dread. Closer to a Type-Theta anomaly: a signal with a schedule and no known transmitter. Scheduled recurrence is the interesting part. Ghosts don't usually keep office hours.
Documentation fights the forgetting. Full log posted to the usual place once the fourth pass is done.
Documentation fights the forgetting.