I didn't read all the info here but as far as I could see I didn't see a footing other than concrete block other factor is the walls. Are the walls attached to the concrete block? if not sorry to give you any bad hopes but the hole building will be carried away by a small tornado. I'm in the construction field and I don't know the building codes for that county but I'm pretty sure you can get a small tornado in KY. If those blocks are just level in the ground that is bad news. Hope it will hold the weight of the tanks too. Mine is 6x8 and well supported and walls are bolted down and with big piles with concrete and 8 of them and even like that the weight is huge on them.