so i finally got our new house on the go. but, when my concrete guy was puoring the footer they were unable to finish the pour in one shot. it wasnt planned out like that, just some unforseen problems accured. but any way im very concerned about the "cold jiont" in the footer. it has rebar in it all the way around, so there will be bar where the joint is. the walls on top of it are going to be styrofoam and theres going to be rock laid under the slab. the footer is about 6 foot below grade (its a full basement) and laid on 'hardpan". should i have any concerns? any input will be greatly appreciated.