3' hole through my poured concrete foundation
I need to drill a 3" hole through my poured concrete foundation below grade.
It's a poured concrete foundation constructed back in 1954 with a sprayed membrane for waterproofing. I have been in this house for 14 yrs. and we've never had any water problems.
Ok, I think thats enough background on the subject.
The actual question is:
How close to the corner would be safe to drill this 3" hole without repercussions?
Of course I will seal the hole back up with a mortar and use something to waterproof it.
Any and all suggestions will be appreciated