From what I have been told, the problem is part drilling and part lab. The situation is that the deep drills were designed and built specifically for the ROF. Once in service they realized that since the material being drilled is so much denser ( and heavier) at these greater depths, the drills do not have the capacity to lift it out of the hole. This then creates a second problem as the lab they are using has everything calibrated to process material of much less density ( weight), and none of their assay results can be relied on.

Best regards

K

tfic