i would think if you took the sq meter surface drilling area of T1, T2A, T2B and multiplied by a depth of 75-100 meters you would get a pretty safe tonnage estimate?

example: if the 3 drilling areas work out to be a 500 X 500 meter sq.=250,000 meter sq

250,000 sq meter X 100M depth = 25Mil sq meter (25mil tons)

i believe the drilling areas are actually much larger, anybody know?