On Fri, 24 Jul 2009 22:16:51 -0400, "CraigT"
wrote:

Given that the crack is only 2 feet under grade I'd like to address the
crack from the outside, but all the flexible repair products seem to be
designed for use from the interior.

A butyl rubber membrane. Some types have adhesive on one side. A piece
a pond liner or shower pan liner with tar will stop the leak.

Sample pic:

http://www.selec****erproofingusa.co...20basement.jpg