(Longview, WA)  --  A 70-year-old man is being treated for serious injuries after a concrete wall collapsed on top of him at a bark company in Longview.  The man, who's reported to be a company executive, had to undergo surgery.  Officials say workers were stacking three-thousand-pound barrier blocks on uneven ground, when the sand beneath the blocks gave way and caused them to fall on the victim's legs.