Cutting exposed PVC pipe conduit
 

What should I use when cutting exposed PVC pipe conduit that is buried in a ditch ?

you can use a cotton string instead of a hacksaw or a hand saw. Wrap the string (such as the kind contractors use for form lines) half-way around the conduit and see-saw the ends. The friction will cut the PVC cleanly as quickly as a hacksaw and does not require the space. Nylon string will not work because nylon and the PVC melt together.

What is in the pipe? You said conduit. If there are wires in the pipe you better talk to a sparky first.
(sparky = electrician)