Is it possible to create a 4 inch by 4 inch channel through concrete using acid?

I'm trying to figure out a way to eat through concrete without damage pex tubing inside (its a radiant heated slab). Is there any way using some type of acid (hydrofluoric, muriatic ) to eat a 4 inch wide, 4 inch deep, and 71 foot long channel through the slab that could be tapped out with a blunt chisel? Pex tubing is resistant to most acids so it would not be damaged.


Also, this needs to be cost effective (under $1000).




Offhand, this seems dangerous to the structural integrity of the slab, because the acid would follow the pore structure of the concrete and weaken the wrong places.


However, *concrete cutting saw rental* is available; e.g. [United Rentals](http://www.unitedrentals.com/en/catalog/equipment-tools/concrete-masonry/concrete-saw-13-hp-propelled)
and <http://www6.homedepot.com/tool-truck-rental/Walk_Behind_Concrete_Saw_14/MK-CX3/index.html>. Two 45-degree cuts ~6" or deeper should do the job.


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