So there are more than one spot.
A human worker measures the radiation with the survey meter on the stick, August 1. Judging by the pale green color on the ground, workers must have been here, spraying the resin to suppress radioactive particles from flying:
Then, the photo taken with a gamma-ray camera on July 31 shows two spots with high radiation. The lower left one is the one measured by the human worker in the first photo.
Maybe it was not such a good idea to remove the debris. They may have shielded the workers from extreme radiation like these.