If I remember correct. The hazardous process of leaching takes roughly 1-month to leach and extract. With 2 pads at 42,000 tons. If they received .65 grams per ton,
.65 x 84,000 = 54,600 grams
54,600g x (1oz/28.35g) = 1,926 ounces
$1835 (gold price) x 1926 ounces =
$3,535,000/month gold
If that grams works out to be that.