2001 Saturn L200 Leaking Engine coolant within cab.

Ive had this problem for a little while, but at random times, it seems that most to all of my engine coolant leaks onto the floor board of the passanger side. It floods the carpet with fluid. It only occurs on the passenger side upfront and it leaks pretty good. When I took it in to check it out, it doesnt seem to leak. A pressure cap was placed onto the engine coolant container within the engine to force a leak but still nothing. Because the leak seems to start on the right side of the floor bed toward the door I think it may be coming from underneath the carpet. There is no obvious trail of the fluid following it to any parts. Thanks

-Rico-