A power steering leak can be tricky to identify at at least initially. Depending on the type you use, it can be red, like transmission fluid. Or it can be clear, and seem like coolant.
One way to help identify it is the location of the drips. When your low pressure line leaks, it tends to drip down on to the driver's side motor mount heat shield. From there, it runs down the mount and on to the cross-member that runs under the engine. Eventually, it drips down at the center of this cross-member.