Found Leak! -2002 Venture

So today I went to run some errands. Low and behold there was a puddle of green stuff under my van. It was at the back (driver's side, directly behind the back wheel). So I take a peek underneath to see where it is coming from. There are three hoses/pipes that seem to run from the front to the back of the van. The one that is leaking is the hose closest to the back tire (driver's side). I hope I'm being clear in my explanation. I did take a pic because it doesn't seem to leak all the time and the last time I took it to the mechanic it had stopped and dried up and the mechanic couldn't see a thing. Does this still sound like a coolant leak coming out of a hose from the back of the van? Please help.

It's likely a rear A/C coolant line.

Seeing it's under pressure you may have to replace the line.

Was the green sticky/ oily if so then AC Oil, if it was watery like koolaid, then antifreeze and someone has switched you to the green stuff (look in radiator to confirm).

http://www.automotiveforums.com/vbulletin/showthread.php?t=1011673

I believe we have the same problem! See Photo....