New construction - can rebar penetrate into the ground??

[msm stl]

My pool builder says that we're almost ready to shoot gunite. As you can see from the picture, every other vertical rebar penetrates the underlying gravel & soil. Everything I read says that any contact of rebar to soil increases chances of concrete failure. Should I insist that my builder cut the rebar short so that the ends are completely encased in concrete? I need to figure this out before he shoots!

 

[msm stl]

try image again...

 

[heavyweight_4u]

It looks like he is supporting the vertical structure with the staked rebar. I see rebar staked into the ground daily in commercial construction. But other times I see it called for not allowing it to be touching the ground. I wouldn't think it would be to big an issue in this application but if there is a way to have him change it why not and avoid the entire chance of it being an issue.