Well friends, the repairs worked. Seep has dried up as a result of fixing the cracked mortar collar with hydraulic cement and covering the face of the pipe penetration with 300 lbs of bentonite chips (coated gravel). I’ll be installing a small bubbler near the overflow so the ice won’t lift the pipe and re-open the leak in following winters.

A tip for using bentonite chips - mix 50-50 with dirt prior to spreading. The bentonite goes further and the dirt gives the swelled up bentonite “snot” more body.

Thanks for all the help!

Tony