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RE: Elevated post-tensioned slab cracks

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Thanks Gail,
 
As I stated in my original post, the cracks are full depth and occur somewhere between column lines (middle strip areas, if you will, just to clarify location), and there has not been any repair work done on them. And, Yes, they are leaking with a lot of efflorescent on the bottom side of the slab. There is one place where water is dripping out of the plugged end of a tendon. We could not trace the source of this one, yet.
 
With regards to the "conventional wisdom", what if the cracks are fully open, essentially no pre-compression? Would you rely on the catenary action of the tendons? Which is another explanation I've heard in the past for ignoring the cracks.
 
Thanks again
 
Oshin Tosounian, S.E.
Los Angeles, CA