Soakaway Query over raft ?

[coxsox]

Just in process of digging out for a raft for foundations to my extension. I have discovered the soak away passes directly under the extension. I need to keep digging to see if it clears the extension and if it doesn't then I will need to relocate it. My only worry is that removing the soak away will change the ground conditions somewhat resulting in possible shrinkage of the ground.

What should I do about this ? I can relocate the soak away to another route away from the extension if need be, thanks

 

[coxsox]

Ok traced all drainage pipework and there is no soak away located under the proposed extension, its just the pipework runs below this. As the raft is appropx 500mm above this pipework I presume having the pipework below the extension is ok ?