I've been reading a lot about recovery systems and it seems like they all use a vac syatem. Can you build a simple setup with dams and a pump like this one?
http://www.google.com/products/cata...a=X&ei=_IEVUO7-B4io8gTin4GgBw&ved=0CGIQ8wIwAA
http://www.google.com/products/cata...a=X&ei=_IEVUO7-B4io8gTin4GgBw&ved=0CGIQ8wIwAA