Ann: Orinoco Confirms Outstanding Grades of Gold in Tailings, page-42

There is a lot of description about security in this announcement. I think they have a very strong suspicion that the on-the-ground guys were not as incompetent as they appear.

After each sample the hammer mill was thoroughly cleaned to prevent contamination of the next sample. Heavy concentrates that are contained in the gold trap are then manually panned, whilst the carpets are folded and cleaned in a controlled environment. All final processing of the gold concentrate is carried out in the secure gold room.

The milling process is recorded with CCTV and monitored by senior staff to ensure process integrity. Final processing is carried out in the gold recovery room under rigid security controls and accompanied by the departmental manager.